JP5649863B2 - Liquid spray dryer - Google Patents

Description

  The present invention relates to a liquid spray dryer that performs a drying process for volume reduction and recycling of liquid processed products such as waste liquid and sludge, or for manufacturing a dried product from water-soluble foods and chemicals. It is.

  Conventionally, liquid treatment products such as waste liquid and aqueous solution are dried to reduce the volume and recycling of sludge and waste liquid, or to produce dry products from water-soluble foods and chemicals. A liquid dryer is used to generate (hereinafter referred to as a dried product).

  Such a liquid dryer is a device that generates a dried processed product by flowing a liquid processed product to be processed into a heated drying means and evaporating moisture of the liquid processed product by heating. However, in order to dry the inflowed liquid processed material, the drying efficiency is low, and a liquid spray dryer for atomizing the liquid processed material and drying it is used for the purpose of improving the drying efficiency.

  Such a liquid spray dryer atomizes a liquid processed product with a spray nozzle and sprays it, and heats and sprays the sprayed processed product (hereinafter referred to as a sprayed processed product) to produce a dried processed product. can do.

For example, a liquid spray dryer using a two-fluid spray nozzle has been proposed as one of such liquid spray dryers (see Patent Document 1).
The liquid spray dryer shown in Patent Document 1 is composed of a two-fluid spray nozzle arranged at the upper part and a lower part of the two-fluid spray nozzle, and a drying tower whose inside is a high-temperature space. The spray-like processed product can be dried in a high-temperature space inside the drying tower and produced as a dried processed product.

  The two-fluid spray nozzle includes a bell-shaped nozzle body having an open lower end, a liquid spout that is disposed in an upper portion inside the nozzle body, and ejects a liquid treatment product in a thin line shape, and a liquid ejected from the liquid spout. It is comprised with the compressed air ejection port which ejects compressed air toward a processed material.

  By the two-fluid spray nozzle having such a configuration, the liquid treatment product ejected from the liquid ejection port is atomized by the compressed air ejected from the compressed air ejection port, and from the opening at the lower end of the bell-shaped nozzle body, It can spray toward the high temperature drying space inside the drying tower arrange | positioned below.

  Then, in the high-temperature drying space inside the drying tower, the dried processed product can be generated by evaporating the moisture of the spray-shaped processed product. As described above, in the liquid spray dryer, since the liquid processed product is recovered as a dried processed product, the processed product can be reduced in volume and recovered, and the recovered processed product can be recycled.

However, in the liquid spray dryer, the two-fluid spray nozzle is likely to be clogged, and maintenance is troublesome, and there is a possibility that satisfactory processing performance cannot be ensured.
Specifically, in the liquid spray dryer, the liquid processed product is discharged from the liquid jet outlet in the direction corresponding to the spraying direction of the sprayed processed product sprayed downward from the opening at the lower end of the nozzle body in the nozzle body. Erupt. On the other hand, since the compressed air ejection port ejects compressed air toward the liquid processed material ejected from the liquid ejection port, the compressed air is ejected in a direction crossing the spraying direction.

  Therefore, when the liquid treatment product ejected in the ejection direction coinciding with the spray direction and the compressed air ejected in the ejection direction intersecting the spray direction collide inside the nozzle body and atomize, the liquid treatment product is , Scattered inside the nozzle body and adheres to the inner surface of the nozzle body.

  The inner surface of the nozzle body to which the scattered liquid processing product adheres is close to a drying tower with a high-temperature drying space inside, so it is heated to a high temperature. Dry and adhere firmly.

  Once the processed material adheres to the inner surface of the nozzle body, the processed material accumulates on the adhered processed material and closes the opening of the nozzle body. Even if the opening is not completely closed, the accumulated cross-sectional area is reduced by the accumulated treatment, so that the spray amount of the spray-like treatment is reduced, or the accumulated liquid treatment is dripped and dried. The processing capacity will be reduced. In order to prevent such a reduction in the processing capacity of the drying process, that is, in order to maintain the processing capacity, it is necessary to frequently remove the processed material adhering to the inner surface of the nozzle body, and satisfactory processing performance can be obtained. There was a risk that it could not be secured.

JP 2007-330146 A

  Then, this invention aims at providing the liquid spray dryer which can dry-process stably, without a drying processing capacity falling.

The present invention is a liquid spray dryer for spraying and drying a liquid treatment product, the drying means for applying heat to the liquid treatment product for drying, and a position higher than the drying means. Discharging means for discharging , disposed at a position higher than the drying means, and provided with gas jetting means for jetting gas downward in the vertical direction toward the drying means, the drying means being heated at least on the outer peripheral surface, It consists of a columnar heating column with an inverted posture that rotates with respect to the central axis direction, and the discharge means is connected to the liquid processed material in which the shape of the hollow cross section through which the liquid processed material is connected is uniform in the conductive direction. constituted by a pipe, ejection of said gas ejection means, as well as arranged in a position for ejecting a vertically downward of the gas to the liquid treatment product discharged from said discharge means, the liquid treated in the discharge means The direction is a direction intersecting the ejecting direction of the vertically downward of the gas towards the heating cylinder from the gas ejection means, and a horizontal direction parallel to said central axis, in the dryer body interior, is ejected In addition, a collision portion where the gas and the discharged liquid processing object collide is an open space.

The discharge means, the liquid treated flows through the interior space, and a pipe or a pipe for flowing out from the opening end, and further, in the direction of flow of the liquid treated in the interior space, ejection detecting means space cross section Ru constant der It can be.

  The above-mentioned liquid treated product contains inclusions that are subject to disposal such as oil-impregnated sludge, water-based paint, water-based ink, activated sludge, washing water / detergent waste liquid, and dried foods such as coffee cake and potato. Use liquid processed products or dry processed products such as skim milk powder, instant coffee, powdered tea, seasoning, protein, powdered green juice, powder, pigment, ceramic material, catalyst support, cosmetics, or powder detergent It can be made into various aqueous solutions.

  The gas may be an appropriate gas according to the properties of the liquid treatment product, such as air or nitrogen gas, and the gas ejection means may be an ejection nozzle that ejects an appropriate gas in a predetermined direction.

By jetting the gas vertically downward with respect to the liquid processing object discharged from the discharging means by the gas jetting means, the gas is jetted to the liquid processing object in the vicinity of the discharge portion of the discharging means. That is, gas is ejected to the liquid processed material discharged from the discharging means and dispersed on the drying means, or gas is ejected to the liquid processed material between the discharge portion and the drying means. It is a concept that includes things.

  Therefore, the collision point where the above-mentioned jetted gas and the discharged liquid processing object collide includes the vicinity of the discharge portion of the discharge means, the position on the drying means or between the discharge portion and the drying means. It becomes.

  In the above-described dryer main body, the collision portion where the jetted gas and the ejected liquid processing product collide is an open space, which means that the gas jetted from the gas jetting means inside the dryer main body. And a space that does not include a partition that divides the interior of the dryer main body such as the nozzle main body and the periphery of the collision portion, for example, as described above, around the collision portion where the liquid processing product discharged from the discharge means collides It means a space opened inside the dryer body.

  The columnar heating column body in an inverted posture that rotates with respect to the horizontal center axis passes through the center of the cylinder cross section, rotates about the center axis that is the columnar height direction, and the center axis direction. Is a columnar body in a horizontal direction that intersects the vertical direction, and can be constituted by a so-called drum-type dryer.
  The horizontal direction can be a horizontal direction or a substantially horizontal direction.

  The above-mentioned liquid processed product conducting pipe in which the shape of the hollow cross section through which the liquid processed material is conducted is uniform in the conducting direction is such that the cross sectional shape of the hollow section through which the liquid treated product is conducted is the conducting direction of the liquid treated product, that is, the longitudinal direction. A pipe that does not change direction.

According to the present invention, it is possible to configure a liquid spray dryer that can stably perform a drying process without reducing the drying processing capacity.
Specifically, the case where the liquid processing object collides with the gas and splatters by making the collision portion where the jetted gas and the discharged liquid processing object collide with the open space inside the dryer body. However, for example, as in the case of a collision inside the nozzle body, the liquid processing object adheres to the inner surface of the nozzle body and closes the opening of the nozzle body, thereby reducing the spray amount of the spray-like processing object sprayed from the nozzle body. Such a problem can be prevented from occurring.

  In addition, since the discharge direction in the discharge means is a direction that intersects with the gas discharge direction from the gas discharge means to the drying means, the liquid processing material discharged from the discharge means is directed from the gas discharge means to the drying means. The liquid treatment product can be sprayed in the direction toward the drying means by the jetted gas. Therefore, for example, the discharge unit discharges the liquid processing object toward the drying unit, and the discharge unit includes a plurality of gas jetting units that discharge gas in a direction intersecting the discharge direction of discharging the liquid processing object. Compared with the case where the gas ejected from the ejection means is combined and the discharged liquid processed material is sprayed toward the drying means, the liquid processed material is surely atomized and sprayed toward the drying means. Can do.

  Specifically, the discharge means discharges the liquid processed material toward the drying means, and the discharge means includes a plurality of gas jetting means for jetting gas in a direction intersecting the discharge direction for discharging the liquid processed material. In the apparatus in which the gas ejected from the means is combined to spray the liquid processed material toward the drying means, the balance of the ejection pressure and the ejection amount of the gas ejected from each of the plurality of gas ejection means is lost. The gas ejection direction of the combined gas changes from the gas ejection means. Therefore, the spraying direction of the spray-like processed product is changed, and there is a possibility that the liquid processed product cannot be reliably sprayed as the spray-like processed product toward the drying means.

  On the other hand, the gas jetting means for jetting the gas toward the drying means is arranged at a position for jetting the gas to the liquid processed material discharged from the discharge means, and the discharge direction in the discharge means is changed from the gas jetting means. Since the gas jet direction from the gas jetting unit is directed to the drying unit by setting the direction to intersect with the gas jetting direction toward the drying unit, the liquid processing product discharged from the discharge unit is dried. It can spray reliably toward.

  Therefore, the sprayed processed material can be stably supplied to the drying means by the jetted gas, and the drying processing can be stably performed without lowering the drying processing capacity. In addition, for example, the liquid processing object and the jetted gas are collided inside the nozzle body as described above, and the sprayed processing object is sprayed from the nozzle body. Satisfaction and convenience can be improved.

  Further, by disposing the discharge unit and the gas ejection unit at a position higher than the drying unit, the spray-like processed product can be efficiently ejected toward the drying unit.

  Specifically, the liquid processing product discharged from the discharge means whose discharge direction intersects the vertical downward jet direction of the gas jet means falls to the drying means by its own weight. In other words, the direction in which the liquid treatment product falls due to its own weight and the gas ejection direction substantially coincide with each other, and gas is ejected to the liquid treatment material that falls toward the drying means due to its own weight. The sprayed processed product can be reliably sprayed toward the drying means.

  Further, the drying means is constituted by a columnar heating column body in an inverted posture in which at least the outer peripheral surface is heated and rotates with respect to the central axis direction, and the discharge direction in the discharge means is a horizontal direction, The liquid treatment product can be efficiently dried.
  Specifically, the outer peripheral surface is heated, and the drying unit is configured by a cylindrical heating columnar body in an inverted posture that rotates about the central axis, and the discharge direction in the discharge unit is set to be a horizontal direction, thereby forming a spray. A processed material can be spread over the wide range of the outer peripheral surface of a heating cylinder.

  Accordingly, the sprayed processed material is spread over a wider range compared to the case where the sprayed processed product is spread on the outer peripheral surface of the heated cylindrical body in a narrower range, so that the drying efficiency can be improved. In addition, when the sprayed processed material is spread on the outer peripheral surface of the heated cylindrical body, the sprayed processed product once becomes liquid on the outer peripheral surface of the heated cylindrical body and is liquidated along the outer peripheral surface of the heated cylindrical body. Although there is a risk of dripping and adhering to the already dried processed material, by spraying it over a wide range on the outer peripheral surface, it is possible to efficiently dry the sprayed liquid processed material and prevent liquid dripping from occurring.

  In addition, since the discharge means is constituted by a liquid processed material conducting pipe in which the shape of the hollow cross section through which the liquid processed material conducts is uniform in the conducting direction, the necessity for maintenance is low, and the drying process is stably performed. It can be carried out.
  Specifically, for example, when the discharge means is configured by a tapered conducting pipe whose diameter of the hollow cross section through which the liquid treatment product conducts decreases in diameter in the conduction direction, the solid contained in the liquid treatment product at the tip of the conduction pipe There is a risk that things will accumulate and become blocked. However, by using a liquid treatment product conducting pipe with a uniform cross-sectional shape in the conduction direction, there is a possibility that the void in the cross section may be clogged even when solid matter is contained in the liquid treatment product to be conducted. Absent. Accordingly, since the liquid processing object can be discharged with a desired discharge amount and discharge pressure, a stable drying process can be performed.

  As an aspect of the present invention, a discharge adjusting means for adjusting at least one of a discharge pressure and a discharge amount of the liquid processed material discharged from the discharge means, a discharge direction adjusting means for adjusting a discharge direction of the liquid processed material, and the gas There may be provided at least one of an ejection state adjusting means for adjusting at least one of an ejection pressure and an ejection flow rate of the gas ejected from the ejection means, and an ejection direction adjusting means for adjusting the ejection direction of the gas.

  According to the present invention, it is possible to adjust at least one of the discharge pressure and discharge amount of the liquid processing object, the gas ejection pressure and ejection amount, the discharge direction of the liquid processing object, and the gas ejection direction. Thereby, it is possible to set an appropriate discharge pressure, discharge amount and discharge direction, and ejection pressure, ejection amount and ejection direction according to various liquid processed products having different properties, depending on the properties of the liquid processed product. The spray state suitable for the drying process can be configured. Accordingly, even liquid processed products having various properties can be efficiently dried.

As an aspect of the present invention, the discharge means and the gas ejection means can be configured independently of each other.
According to the present invention, it is possible to improve the maintainability while configuring with a simple structure.

  Specifically, for example, when the discharge unit and the gas ejection unit are integrally configured, the structure of a liquid processing object and a gas pipe connected to the integrally configured discharge unit and the gas ejection unit is complicated. Further, for example, in the case of including a discharge direction adjusting means for adjusting the discharge direction in the discharge means and a jetting direction adjusting means for adjusting the jet direction in the gas jetting means, the direction adjusting means is included in the integrally configured discharge means and gas jetting means. Compared with the case where it comprises, direction adjustment means can be provided with a simple structure.

  Furthermore, for example, when one of the ejection unit and the gas ejection unit fails, if the ejection unit and the gas ejection unit are configured integrally, it is necessary to replace both, but a separate configuration is required. Therefore, it is only necessary to replace the faulty person, and maintenance work is facilitated.

  According to the present invention, it is possible to provide a liquid spray dryer capable of performing a stable drying process without reducing the drying processing capacity.

1 is an overall schematic diagram of a liquid spray dryer. Sectional drawing of a dryer main body. The perspective view inside a dryer main body. Explanatory drawing about a spray-like processed material. Sectional drawing of the dryer main body of another embodiment. Sectional drawing of the dryer main body of another embodiment.

An embodiment of the present invention will be described below with reference to the drawings.
1 shows an overall schematic diagram of the liquid spray dryer 1, FIG. 2 shows a sectional view of the dryer body 4, FIG. 3 shows a perspective view of the interior of the dryer body 4, and FIG. The explanatory view about processed material E 'is shown. 4 (a) shows an enlarged side view of the liquid treatment product conveying pipe 25 and the ejection nozzle 36, and FIG. 4 (b) shows an enlarged sectional view for explaining a process of drying the spray-like treatment product. Yes.

  As shown in FIG. 1, the liquid spray dryer 1 includes a liquid processed product drying unit 10 that dries the liquid processed product E, and a liquid processed product supply unit 20 that supplies the liquid processed product E to the liquid processed product drying unit 10. The compressed air supply unit 30 supplies compressed air to the liquid treatment product drying unit 10.

  In addition, the liquid treatment product E to be dried here is an oil-containing sludge, water-based paint, water-based ink, activated sludge, washing water / detergent waste liquid, coffee cake, potato and other foods such as skin and body. Liquid processed product containing inclusions to be disposed of, or skim milk powder, instant coffee, powdered tea, seasoning, protein, powdered green juice, powder, pigment, ceramic material, catalyst support, cosmetics, or Various aqueous solutions that can be used as a product can be dried products such as powder detergents.

  The liquid treatment product drying unit 10 includes a dryer body 4, a boiler 11 that generates high-temperature steam, a steam line 12 that supplies steam generated in the boiler 11 to the inside of the dryer body 4, and a steam drain cock 13a. A drain line 13 that discharges moisture accumulated inside the dryer body 4 to the outside, a steam separator 14 that separates exhaust gas containing evaporated vapor (vapor) that has been carried into evaporated vapor and exhaust gas, and a path A ventilation line 15 having a ventilation fan 15a in the middle and connecting the ventilation port 42a on the top of the dryer body 4 and the steam / water separator 14, and a treated product connecting the steam / water separator 14 and the liquid treated product tank 21. A circulation line 16 and an exhaust line 17 connected to the steam separator 14 and exhausting exhaust gas to the outside air are configured.

  The ventilation line 15 is configured to discharge the exhaust gas containing the vaporized vapor (vapor) evaporated from the liquid processing product E generated in the dryer main body 4 to the steam separator 14 by the ventilation fan 15a. The processed product circulation line 16 is configured to reduce the separated vaporized vapor to a liquid processed product tank 21 described later.

  The liquid processed product supply unit 20 includes a liquid processed product tank 21 for storing the liquid processed product E, a pressure feed pump 22 for pumping the liquid processed product E in the liquid processed product tank 21 toward the liquid processed product drying unit 10, and a liquid processing The liquid treatment product tank 21 and the liquid treatment product are dried via the liquid treatment product flow rate adjustment valve 23 for adjusting the flow rate of the liquid treatment product E supplied to the material drying unit 10, and the pressure feed pump 22 and the liquid treatment product flow rate adjustment valve 23. It is constituted by a liquid processed material transfer line 24 connecting the section 10.

Note that a liquid processed material transfer pipe 25 disposed inside the dryer body 4 is connected to the tip of the liquid processed material transfer line 24, and a liquid processed material discharge port 26 is formed at the tip of the liquid processed material transfer pipe 25. (See FIG. 3).
The liquid processing material transport pipe 25 is formed of a conductive pipe having a circular cross section in which a conductive space 25a is formed and the cross section does not change in the longitudinal direction.

  The compressed air supply unit 30 supplies a compressor 31 that generates compressed air A, a compressed air tank 32 that stores the compressed air A generated by the compressor 31, and supplies the compressed air A from the compressed air tank 32 toward the dryer body 4. The compressed air line 33 and the air flow rate adjusting valve 34 for adjusting the flow rate of the compressed air A supplied toward the dryer body 4 are configured. In addition, the compressed air conveyance pipe 35 arrange | positioned inside the dryer main body 4 is connected to the front-end | tip of the compressed air line 33, and the ejection nozzle 36 which ejects the compressed air A is provided in the front-end | tip of the compressed air conveyance pipe 35 (FIG. 3).

  The dryer main body 4, which is called a double drum dryer, is dried by the dryer housing 42 disposed on the work platform 41, the two dryer drums 43 disposed in an inverted position disposed inside the dryer housing 42, and the dryer drum 43. The scraper 44 peels off the dried processed product F from the drum surface, and the dried processed product recovery tank 45 collects the dried processed product F peeled off by the scraper 44.

  The dryer housing 42 has a substantially pyramid shape as viewed from the front and gradually decreases in a stepped manner from the bottom. The dryer housing 42 includes a ventilation port 42a at the upper end and forms a substantially closed internal space 42b.

  In the internal space 42b, as shown in FIGS. 2 and 3, two dryer drums 43 are installed so that their central axes L are parallel to each other at the same height, and the depth positions are also arranged. Yes. The two dryer drums 43 are configured to rotate outward from each other around a central axis L by a drive source (not shown) (see arrows in FIG. 2). In addition, although the outer peripheral surface is mutually touching the opposing part of the two dryer drums 43, you may provide a clearance slightly.

  The steam line 12 is connected to the center of the back side surface of the dryer drum 43, and the outer peripheral surface of the dryer drum 43 is heated by the high-temperature steam introduced into the interior of the dryer drum 43.

  The scraper 44 is provided on both outer lower portions of the liquid treatment product drying unit 10, and the tip end portion 44 a of the scraper 44 is in contact with the outer peripheral surface of the dryer drum 43 and slides on the outer peripheral surface of the dryer drum 43.

  Further, in the internal space 42 b, the liquid treatment product conducting pipe 25 and the compressed air conveying pipe 35 are provided above the dryer drum 43. In addition, the liquid processed material conducting pipe 25 is connected to the liquid processed material conveying line 24, and the compressed air conveying pipe 35 is connected to the compressed air line 33.

  The liquid treatment product conduction pipe 25 is provided horizontally so as to be parallel to the central axis L of the dryer drum 43 immediately above the facing portions of the two dryer drums 43. On the other hand, the compressed air conveyance pipe 35 is arranged so that the longitudinal direction thereof is vertical immediately above the facing portions of the two dryer drums 43.

  The compressed air conveyance pipe 35 has an inner diameter divided into two stages, and the inner diameter R2 of the pipe near the opening is smaller than the inner diameter R1 of the pipe farther from the opening, that is, when the compressed air conveyance pipe 35 approaches the opening, The inner diameter is reduced. The compressed air A is configured to reach the compressed air transport pipe 35 from the compressed air tank 32 through the compressed air line 33 and jet out from the opening of the compressed air transport pipe 35 toward the liquid treatment product drying unit 10. Since the compressed air transport pipe 35 has a structure in which the inner diameter of the pipe decreases as it approaches the opening, the compressed air A increases the flow velocity in the vicinity of the opening and the compressed air A toward the dryer drum 43 from the opening. Can be ejected vertically downward.

  As shown in FIG. 4A, the liquid processed product conducting pipe 25 is a cylinder having a uniform inner diameter R3, and can discharge the liquid processed product E substantially parallel to the central axis L of the dryer drum 43.

  Therefore, the liquid processed material E discharged horizontally from the liquid processed material conducting pipe 25 is atomized by the compressed air A ejected from the compressed air conveying pipe 35 to become the spray-shaped processed material E ′, and the dryer drum 43 is caused by its own weight and air pressure. Can be spread thinly and widely against the outer surface of

  In addition, the spray shape of the spray-like processed material E ′ in a front view is a fan shape having an injection angle D that is symmetric with respect to the vertical axis passing through the opening of the compressed air conveyance pipe 35 and about 60 degrees. Further, the spray shape of the spray-like processed material E ′ in a side view is a parabolic shape extending from the liquid processed material discharge port 26 of the liquid processed material conducting pipe 25 to the entire outer peripheral surface of the dryer drum 43.

  Further, as shown in FIGS. 2 and 3, the liquid processed material E discharged from the liquid processed material transport pipe 25 and the compressed air A ejected from the ejection nozzle 36 of the compressed air transport pipe 35 above the dryer drum 43. Is an open space in the internal space 42b, which is a substantially closed space, around the collision portion S that becomes a spray-like processed object E ′ by collision, and what is other than the liquid processed material conducting pipe 25 and the compressed air conveying pipe 35 Is not installed.

  The liquid processed product E (sprayed processed product E ′) thinly sprayed on the outer peripheral surface of the dryer drum 43 by the liquid processed product transport pipe 25 and the compressed air transport pipe 35 having such a configuration and arrangement is heated by the dryer drum 43. The water evaporates and the water evaporates and adheres to the outer peripheral surface of the dryer drum 43 as the dried processed product F. Then, due to the outward rotation of the dryer drum 43, the dry processed material F is peeled off from the outer peripheral surface of the dryer drum 43 by the scraper 44 that slides relative to the outer peripheral surface of the dryer drum 43, and is substantially powdery. Then, it is dropped and collected in a dried processed material recovery tank 45 disposed below.

  In this way, the dryer main body 4 that sprays and dries the liquid processed product E (sprayed processed product E ′), two dryer drums 43 that heat the liquid processed product E to dry, and the liquid processed product E A liquid processed material transport pipe 25 to be discharged and an ejection nozzle 36 for ejecting compressed air A toward the dryer drum 43 are provided, and the ejection nozzle 36 is applied to the liquid processed material E discharged from the liquid processed material transport pipe 25. The compressed air A is disposed at a position where the compressed air A is ejected, and the discharge direction of the liquid processed material transport pipe 25 is set to a direction intersecting the ejection direction of the compressed air A from the ejection nozzle 36 toward the dryer drum 43, and the internal space 42b. In the above, by making the collision location S where the ejected compressed air A and the ejected liquid processed product E collide into an open space, the drying processing capacity does not decrease, It can be constant to drying.

  Specifically, in the internal space 42b, the liquid treated product E is formed by setting the colliding portion S where the jetted compressed air A and the ejected liquid treated product E collide to become the spray-like treated product E ′ as an open space. Even when the liquid collides with the compressed air A and scatters, for example, as in the case of the collision inside the nozzle body, the liquid processed material E adheres to the inner surface of the nozzle body and closes the nozzle body. It is possible to prevent a problem that the spray amount of the spray-like processed product E ′ to be sprayed is reduced.

  In addition, since the discharge direction in the liquid processed material transport pipe 25 is set to the horizontal direction which is the direction in which the compressed air A is ejected from the ejection nozzle 36 toward the dryer drum 43, that is, the direction perpendicular to the vertical direction, the liquid processed material transport is performed. The liquid processed product E discharged from the pipe 25 can be sprayed as the sprayed processed product E ′ in the direction toward the dryer drum 43 by the compressed air A ejected from the ejection nozzle 36 toward the dryer drum 43.

  Therefore, for example, the liquid processing material transport pipe discharges the liquid processing material E toward the dryer drum, and the liquid processing material transport pipe ejects the compressed air A in a direction crossing the discharge direction in which the liquid processing material E is discharged. Compared with the case where a plurality of ejection nozzles are provided, and the compressed air A ejected from the plurality of ejection nozzles is combined to spray the ejected liquid treatment E toward the dryer drum, the liquid treatment E is surely It can be atomized and sprayed toward the dryer drum 43 as a spray-like processed product E ′.

  Specifically, the liquid processing material transport pipe discharges the liquid processing material E toward the dryer drum, and the liquid processing material transport pipe ejects the compressed air A in a direction intersecting the discharge direction of discharging the liquid processing material E. In a device that includes a plurality of nozzles and combines compressed air A ejected from a plurality of ejection nozzles to spray the liquid processed material E toward the dryer drum, ejection of compressed air A ejected from each of the plurality of ejection nozzles When the balance between the pressure and the ejection amount is lost, the ejection direction of the compressed air A that is ejected from a plurality of ejection nozzles changes, so that the spraying direction of the spray-like treated product E ′ changes, and the liquid treated product is removed from the dryer. There is a possibility that it is not possible to reliably spray toward the drum.

  On the other hand, the ejection nozzle 36 that ejects the compressed air A vertically downward toward the dryer drum 43 is disposed at a position where the compressed air A is ejected to the liquid processed material E discharged from the liquid processed material transport pipe 25. At the same time, the ejection direction of the compressed air A from the ejection nozzle 36 is set by setting the ejection direction in the liquid processing material transport pipe 25 to a horizontal direction intersecting the ejection direction of the compressed air A from the ejection nozzle 36 toward the dryer drum 43. Since the direction is toward the dryer drum 43, the liquid processed material E discharged from the liquid processed material transport pipe 25 can be reliably sprayed toward the dryer drum 43 as the sprayed processed material E ′.

  Accordingly, the sprayed processed product E ′ can be stably supplied to the dryer drum 43 by the jetted compressed air A, and the drying processing can be stably performed without lowering the drying processing capacity. In addition, for example, the liquid processed material E and the compressed air A ejected inside the nozzle body collide with each other, and the sprayed processed material E ′ is sprayed from the nozzle main body. Satisfaction and convenience can be improved.

  Further, the pressure pump 22 for adjusting the discharge pressure of the liquid processed material E discharged from the liquid processed material transport pipe 25, the liquid processed material flow rate adjusting valve 23 for adjusting the discharge amount, and the ejection of the compressed air A ejected from the ejection nozzle 36 Since the compressor 31 for adjusting the pressure and the air flow rate adjusting valve 34 for adjusting the jet flow rate are provided, the discharge pressure and the discharge amount of the liquid processed material E and the jet pressure and the jet amount of the compressed air A can be adjusted. .

  Thereby, it is possible to set appropriate discharge pressure and discharge amount and ejection pressure and ejection amount according to various liquid processed products E having different properties, and suitable for drying processing according to the properties of the liquid processed product E. A spray state can be configured. Therefore, even the liquid processed product E having various properties can be efficiently dried.

  Further, by arranging the liquid processed material transport pipe 25 and the ejection nozzle 36 at a position higher than the dryer drum 43, the liquid processed material E can be efficiently ejected toward the dryer drum 43 as the sprayed processed material E ′. it can.

  Specifically, the liquid processed material E discharged from the liquid processed material transport pipe 25 whose discharge direction intersects the discharge direction of the discharge nozzle 36 falls toward the dryer drum 43 by its own weight. That is, since the falling direction of the liquid processing object E due to its own weight and the jetting direction of the compressed air A substantially coincide with each other, the compressed air A is jetted out to the liquid processing object E falling toward the dryer drum 43 due to its own weight. The liquid processed product E can be reliably sprayed toward the dryer drum 43 as the spray-like processed product E ′ with a jet pressure or a small jet amount.

  In addition, the discharge direction of the liquid processing object E in the liquid processing object transport pipe 25 is set to the horizontal direction with respect to the cylindrical dryer drum 43 in an inverted posture in which the outer peripheral surface is heated and rotates about the central axis L as the rotation direction. Therefore, the liquid processed product E can be dried more efficiently.

  Specifically, the discharge direction of the liquid processed material E in the liquid processed material transport pipe 25 is the horizontal direction with respect to the cylindrical dryer drum 43 in an inverted posture in which the outer peripheral surface is heated and rotates about the central axis L. Thus, the sprayed processed product E ′ can be sprayed over a wide range of the outer peripheral surface of the heated cylindrical dryer drum 43.

  Therefore, compared with the case where the sprayed processed product E ′ has a narrow spray range on the outer peripheral surface of the dryer drum 43 and concentrates, the sprayed processed product E ′ is sprayed over a wide range, thereby improving the drying efficiency. Can do. Further, when the sprayed processed product E ′ has a narrow spray range on the outer peripheral surface of the dryer drum 43 and concentrates, the sprayed processed product E ′ becomes liquid on the outer peripheral surface of the dryer drum 43 and travels along the outer peripheral surface of the dryer drum 43. However, the sprayed processed product E ′ is efficiently dried by spraying over a wide area on the outer peripheral surface, and the liquid is dripped. Can be prevented.

In addition, since the liquid processed material transport pipe 25 and the ejection nozzle 36 are configured independently of each other, it is possible to improve the maintainability while configuring with a simple structure.
Specifically, for example, when the liquid processing material transport pipe and the ejection nozzle are integrally configured, structures such as a compressed air line 33 connected to the integrally configured liquid processing material transport pipe, a liquid processing material transport line 24 connected to the ejection nozzle, and the like. Is complicated. Furthermore, for example, when one of the liquid processing material transport pipe 25 and the ejection nozzle 36 fails, if the liquid processing material transport pipe 25 and the ejection nozzle 36 are integrated, it is necessary to replace both. By constructing the body, it is only necessary to replace the malfunctioning person, and the maintenance work is facilitated.

In addition, since the liquid processed material transport pipe 25 is formed of a conductive pipe having a uniform cross-sectional shape where the liquid processed material E conducts in the conductive direction, the necessity for maintenance is low, and the drying process is stably performed. be able to.
Specifically, for example, when the liquid processed material transport pipe 25 is configured by a tapered conductive pipe whose shape of a hollow cross section through which the liquid processed material E conducts is reduced in diameter in the conducting direction, the liquid treatment is performed at the end of the conducting pipe. There is a possibility that solids contained in the object E accumulate and block. However, by using a conducting pipe having a uniform cross-sectional shape in the conducting direction, there is no possibility that the conducting space 25a is blocked even when the liquid treatment product E that conducts contains solid matter. Accordingly, since the liquid processed material E can be discharged with a desired discharge amount and discharge pressure, a stable drying process can be performed.

  Further, a pressure feed pump 22 that adjusts the discharge pressure of the liquid processed material E discharged from the liquid processed material transport pipe 25, a liquid processed material flow rate adjustment valve 23 that adjusts the discharge amount of the liquid processed material E, and a compression discharged from the ejection nozzle 36. By including the compressor 31 for adjusting the jet pressure of the air A and the air flow rate adjusting valve 34 for adjusting the jet flow rate, the discharge pressure and the discharge amount of the liquid processed product E suitable for various liquid processed products E having different properties. The spray pressure of the compressed air A and the spray amount can be set, and the spray state suitable for the drying process can be configured according to the properties of the liquid processed product E. Therefore, even the liquid processed product E having various properties can be efficiently dried.

  In the above description, the dryer drum 43 and the liquid processed material transport pipe 25 are arranged horizontally. However, the dryer drum 43 and the liquid processed material transport pipe 25 may be slightly inclined. Any one of the object transport pipes 25 may be slightly inclined. For example, by inclining the dryer drum 43, the spray range on the outer peripheral surface of the dryer drum 43 can be expanded.

  Further, in the dryer main body 4, the spray-like processed product E ′ is sprayed and dried on the dryer drum 43 whose outer peripheral surface is heated by steam. For example, the outer peripheral surface of the dryer drum 43 is electrically heated. May be. Further, the sprayed processed material E ′ may be sprayed into a drying chamber or the like having a high-temperature atmosphere by blowing air into the inside of the hot air, heating with far infrared rays, or the like. Further, it may be configured to generate the dried processed product F by rotating and spraying the sprayed processed product E ′ on the heated disk.

  Further, in the above-described dryer main body 4, the compressed air A is ejected from the ejection nozzle 36 to the liquid processed material E discharged from the liquid processed material discharge port 26 of the liquid processed material transport pipe 25, thereby the liquid processed material discharge port. Compressed air A and liquid processing object E collide at a collision point S near 26 and sprayed on the dryer drum 43 as an atomized processing object E ′, but the liquid processing object discharge port 26 and the outer surface of the dryer drum 43 The compressed air A and the liquid processed material E may collide with each other at any position on the discharge parabola of the liquid processed material E in the meantime to form the sprayed processed material E ′.

  In this case, since the compressed air A collides with the liquid processing object E diffused as the collision point S is separated from the liquid processing object discharge port 26, the size of water droplets constituting the sprayed processing object E ′ is increased. The spraying range for the dryer drum 43 is expanded. Therefore, what is necessary is just to adjust the position of the collision location S used as a spray state with the relative position of the ejection nozzle 36 with respect to the liquid treatment material discharge port 26 according to the property of the liquid treatment material E. Thereby, even if it is the liquid processed material E of any property, the dry processing capability similar to the above-mentioned dryer main body 4 is securable.

  Further, the compressed air A is ejected from the ejection nozzle 36 to the liquid processed product E sprayed directly on the outer peripheral surface of the dryer drum 43, and the sprayed range of the liquid processed product E on the outer surface of the dryer drum 43 is diffused. May be. In this case, although the spray-like processed product E ′ is not generated, the spray-like processed product E ′ is in the same state as the state where the spray-like processed product E ′ is sprayed on the dryer drum 43. Can be secured. However, since the temperature of the outer surface of the dryer drum 43 may be lowered depending on the temperature of the liquid processed product E and the spray amount, it is more preferable to eject the heated compressed air A.

In addition, although the liquid processed material transport pipe 25 and the compressed air transport pipe 35 are separately configured, the maintenance performance may be slightly reduced, but of course, they may be integrally configured.
In addition, the liquid treatment product transport pipe 25 is formed of a conduction pipe having a circular cross section in which the internal conduction space 25a does not change in cross section in the longitudinal direction. For example, the liquid treatment product E flows in the conduction space 25a, that is, the longitudinal direction. It can consist of pipes that shrink or expand slightly in the direction. Thereby, the discharge speed of the liquid processed material E discharged from the liquid processed material discharge port 26 can be adjusted.

  Furthermore, a direction adjusting mechanism may be provided so that the discharge direction of the liquid processed material transport pipe 25 and the ejection direction of the compressed air transport pipe 35 can be adjusted. Thereby, according to the property of the liquid processed material E to be atomized, a discharge direction and a jetting direction can be adjusted and a more efficient drying process can be performed.

  Even in this case, since the liquid processed material transport pipe 25 and the compressed air transport pipe 35 are separated from each other as compared with the case where the liquid processed material transport pipe and the ejection nozzle are integrally configured, the direction adjustment is performed with a simple structure. Means may be provided.

  Further, the adjustment of the jet pressure of the compressed air A by the compressor 31, the adjustment of the jet amount of the compressed air A by the air flow rate adjusting valve 34, the adjustment of the discharge pressure of the liquid processed product E by the pressure pump 22, and the liquid processed product flow rate adjusting valve 23 The adjustment of the discharge amount of the liquid processed material E by the above, or the adjustment of the discharge direction of the liquid processed material transport pipe 25 and the adjustment of the ejection direction of the compressed air transport pipe 35 are controlled entirely by a controller constituted by a CPU or the like. May be adjusted.

  In the above description, the compressed air A is generated by the compressor 31 of the compressed air supply unit 30. However, the compressed air A is not limited to air, and an appropriate gas such as nitrogen gas may be compressed and ejected. Furthermore, although the spraying ability is reduced, an appropriate gas may be ejected vigorously without being compressed.

  Further, the dryer body 4 in the liquid spray dryer 1 described above includes two dryer drums 43 that rotate outward, and the dried processed product F dried on the outer peripheral surface of the dryer drum 43 is removed by the scraper 44 and collected. However, as shown in FIG. 5, a configuration may be adopted in which two dryer drums 43 that rotate inward are arranged.

  In this case, a slight clearance is provided between the two dryer drums 43. By configuring in this way, the liquid processed material E sprayed on the outer peripheral surface of the dryer drum 43 is heated by being sandwiched between the dryer drums 43 on both sides at the opposed portions of the dryer drums 43, thereby improving the drying efficiency. be able to. In this case, the scraper 44 is disposed on the outer upper portion of the dryer drum 43.

  Furthermore, as shown in FIG. 6, a dryer main body 4 having a single dryer drum 43 and so-called a single drum dryer may be used. In this case, the liquid processed material transport pipe 25 and the compressed air transport pipe 35 are disposed at the upper center of the dryer drum 43, and a sub roller 45 for preventing liquid processed material E from dripping is provided on the right shoulder of the dryer drum 43 in FIG. And a scraper 44 on the left shoulder. In the case of this dryer body 4, since there is one dryer drum 43, the dryer body 4 can be configured in a compact manner.

In correspondence between the configuration of the present invention and the above-described embodiment,
The liquid spray dryer of the present invention corresponds to the dryer body 4 in the liquid spray dryer 1,
Similarly,
The liquid treatment product corresponds to the liquid treatment product E and the spray-like treatment product E ′ in which the liquid treatment product E is atomized and sprayed.
The gas corresponds to the compressed air A,
The dryer body corresponds to the dryer housing 42,
The drying means and the heated cylinder correspond to the dryer drum 43,
The discharge means corresponds to the liquid processed material transport pipe 25 in the liquid processed material supply unit 20,
The gas jetting means corresponds to the jet nozzle 36 of the compressed air conveyance pipe 35 in the compressed air supply unit 30,
The discharge adjusting means corresponds to the pressure feed pump 22 and the liquid treatment flow rate adjusting valve 23,
The ejection state adjusting means corresponds to the compressor 31 and the air flow rate adjusting valve 34,
The liquid processing product conducting pipe corresponds to the conducting pipe,
The present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, a plurality of combinations of the liquid processed material transport pipe 25 and the compressed air transport pipe 35 may be provided at predetermined intervals in the direction of the central axis L of the dryer drum 43, and this configuration further improves the efficiency of the drying process. can do.

DESCRIPTION OF SYMBOLS 1 ... Liquid spray dryer 4 ... Dryer main body 20 ... Liquid processed material supply part 22 ... Pressure feed pump 23 ... Liquid processed material flow rate adjustment valve 25 ... Liquid processed material conveyance pipe 30 ... Compressed air supply part 31 ... Compressor 34 ... Air flow rate adjustment Valve 35 ... Pneumatic conveying pipe 36 ... Ejecting nozzle 42 ... Dryer housing 43 ... Dryer drum A ... Compressed air E ... Liquid material E '... Atomized material S ... Collision site

Claims (3)

A liquid spray dryer for spraying and drying a liquid treatment product,
Drying means for applying heat to the liquid processed product to dry the liquid processed product;
Disposing means for disposing the liquid processed material , disposed at a position higher than the drying means ;
A gas ejection means that is arranged at a position higher than the drying means, and ejects gas downward in the vertical direction toward the drying means;
The drying means is constituted by a columnar heating columnar body in an inverted posture in which at least the outer peripheral surface is heated and rotates with respect to the central axis direction,
The discharge means;
The shape of the hollow section of the cross section through which the liquid treatment product is conducted is constituted by a liquid treatment product conduction pipe that is uniform in the conduction direction,
The gas jetting unit is disposed at a position for jetting the gas downward in the vertical direction with respect to the liquid processing object discharged from the discharge unit,
The discharge direction of the liquid processed material in the discharge means is a direction that intersects the gas discharge direction in the vertical downward direction from the gas discharge means toward the heating cylinder , and is parallel to the central axis. age,
A liquid spray dryer having an open space where a collision occurs between the jetted gas and the discharged liquid process product inside the dryer body. A discharge adjusting means for adjusting at least one of a discharge pressure and a discharge amount of the liquid processed material discharged from the discharge means;
A discharge direction adjusting means for adjusting a discharge direction of the liquid treatment product;
An ejection state adjusting means for adjusting at least one of an ejection pressure and an ejection flow rate of the gas ejected from the gas ejection means;
The liquid spray dryer according to claim 1, further comprising at least one of jetting direction adjusting means for adjusting the jetting direction of the gas. Wherein the discharge means and the gas ejection means, the liquid spray dryer according to claim 1 or 2 was independent configuration.

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