CN110257171B

CN110257171B - Carclazyte mixing device for grease decolorization

Info

Publication number: CN110257171B
Application number: CN201910681806.4A
Authority: CN
Inventors: 彭冰冰; 彭学民; 徐清辰; 薛松涛
Original assignee: Shandong Lvdi Food Co ltd
Current assignee: Shandong Lvdi Food Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2023-11-24
Anticipated expiration: 2039-07-26
Also published as: CN110257171A

Abstract

The invention discloses a clay mixing device for grease decolorization, which comprises a stirring tank; a premixing tank is arranged at one side of the stirring tank; the top end of the premixing tank is provided with a clay metering cylinder; the top end and the bottom end of the clay metering cylinder are respectively communicated with the clay tank and the premixing tank; a conical diffusion plate is arranged at the communication part of the clay metering cylinder and the premixing tank; the bottom end of the premixing tank is provided with a conical hopper; one side of the premixing tank is provided with an oil injection pipe which is communicated with the premixing tank in a horizontal inscribed manner; the oil filling pipe and the clay metering cylinder are diagonally arranged; the premixing tank, the stirring tank, the conical diffusion plate and the blades are all provided with anti-adhesion coatings. The clay is changed into the prior diffusion type to be mixed and stirred in the premixing tank, so that the mixing and stirring effect is better and more thorough. The pressure of the oil is utilized to be injected into the premixing tank in a horizontal inscribed mode, and the stirring effect is improved by utilizing vortex. The anti-adhesion coating can prevent the adhesion of oil and clay, and the caking is always in a stirring motion state.

Description

Carclazyte mixing device for grease decolorization

Technical Field

The invention belongs to the technical field of grease decoloring devices, and particularly relates to a clay mixing device for peanut oil decoloring.

Background

Peanut oil can be decolorized in the processing process by adopting clay, namely clay is quantitatively put into a tank, the clay and grease are mixed by stirring, and pigments in the grease are adsorbed and removed by utilizing strong adsorbability of the clay.

The application of the decoloring mode is most common, but in a specific operation process, the prior art has a plurality of defects which are not improved effectively.

Firstly, peanut oil enters a tank body and is mixed with clay through a stirring shaft, and the clay is difficult to fully and completely diffuse and mix after entering the oil due to high viscosity of the oil, and the clay is columnar when entering, namely gathered together and falls into the tank body, and even under the stirring action, certain clay caking is generated, and the phenomenon is similar to caking generated when flour or protein powder is unevenly stirred with water and is stuck to the inner wall of a container. In a certain period of time, clay caking can be gradually increased, so that the inner wall of a conveying pipeline is blocked, and shutdown dredging is needed. The dredging process is very time-consuming, the clay caking is drawn out by the rod manually after the machine is disassembled, the pipe diameter of the pipeline is narrow, the blocking distance is long, and a large amount of time is occupied for each shutdown maintenance, so that the normal production progress is influenced. In addition, the generation of clay caking also has great influence on the decoloring effect, the clay is not fully mixed and the decoloring effect is low, the adding amount is required to be increased, and the generation of clay caking is increased while the adding amount is increased, so that the blockage is increased, and the use cost of clay is increased.

In order to change the current situation, the mixing effect is improved by adding a preamble mixing device for premixing, namely, clay is continuously thrown in a small amount for many times, but the structure of equipment is too complex, the cost is high, and many industries prefer to consume a large amount of time for shutdown maintenance and do not want to spend high cost for purchasing the equipment.

Secondly, the clay caking is mostly the included angle and the welding place of siltation in the jar at first, because of the space of included angle department is little, and the rough unevenness of welding place, this all does benefit to the absorption of clay caking and piles up, along with continuous production operation, piles up the volume and is increasingly big, can drop and then block up the pipeline after the volume is big to a certain extent. In addition, the equipment is mostly made of pure stainless steel, clay blocks are easy to adhere to the inner wall, when one part of the inner wall is adhered to the clay blocks, the rest clay blocks are adhered to the clay blocks again after collision, the volume is increased, and then the pipeline is blocked. At present, the traditional mixing mode needs to be stopped and cleaned twice every working day, and the stop is at least carried out for two hours each time, so that the blockage can not be seriously caused, and if the cleaning period is prolonged or reduced, the blockage situation is more serious, so that the production is greatly influenced.

The two problems are the key points of causing clay caking to block the pipeline, so the problems of uneven caking and mixing of clay and adhesion of grease clay to the inner wall are solved.

Disclosure of Invention

The invention aims to solve the technical problems of easy caking and adhesion of clay and blockage of a pipeline in the prior art, and provides a clay mixing device for grease decolorization, so as to overcome the defects in the prior art.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a clay mixing device for grease decolorization comprises a stirring tank; the bottom end of the stirring tank is provided with an oil outlet with a gate valve, and the top of the stirring tank is provided with an oil inlet; the stirring motor is arranged at the top end of the stirring tank and is in transmission connection with blades arranged in the stirring tank through a stirring shaft; the key points are as follows: a cylindrical premixing tank is arranged on one side of the stirring tank;

the top end of the premixing tank is provided with a clay metering cylinder; the top end and the bottom end of the clay metering cylinder are respectively communicated with the clay tank and the premixing tank through gate valves; a conical diffusion plate is arranged at the communication part of the clay metering cylinder and the premixing tank;

the bottom end of the premixing tank is provided with a conical hopper coaxial with the premixing tank, and the bottom end of the conical hopper is communicated with the lower part of the stirring tank through a pipeline;

one side of the premixing tank is provided with an oil injection pipe communicated with the premixing tank, and the oil injection pipe is communicated with the premixing tank in a horizontal inscribed manner; the oil injection pipe and the clay metering cylinder are arranged diagonally;

the premixing tank, the stirring tank, the conical diffusion plate and the blades are all provided with anti-adhesion coatings.

Further, the connection between the oil filling pipe and the premixing tank is set at the golden section ratio of 0.618 of the height of the premixing tank.

Further, the included angle between the conical hopper and the premixing tank is 110 degrees less than a less than 130 degrees.

Further, the height of the premix tank is higher than the height of the agitator tank, and the height of the premix tank is twice the height of the clay metering cylinder.

Further, the top end of the premixing tank is provided with an openable sealing cover.

As another invention point of the invention, the invention also relates to an improvement of the coating material, and the preparation method of the anti-adhesion coating comprises the following steps: and spraying the coating, and standing for 2-3d at normal temperature to obtain the anti-adhesion coating.

The coating is prepared from the following raw materials in parts by weight:

100 parts of epoxy resin, 20 parts of diethyl phthalate, 15 parts of nano titanium dioxide, 12 parts of nano graphite, 10 parts of kaolin, 5 parts of nano talcum powder, 8 parts of hexamethylcyclotrisiloxane, 1 part of emulsified silicone oil, 2 parts of propylene glycol butyl ether and 0.5 part of polydimethylsiloxane.

Further, the preparation method of the coating comprises the following steps:

1) Calcining kaolin at 600-700 ℃ for 60min, cooling to room temperature, grinding, and sieving with a 200-mesh sieve to obtain calcined kaolin;

2) Placing epoxy resin into a container, adding diethyl phthalate, magnetically stirring at 300rpm for 5min, sequentially adding nano titanium dioxide, nano graphite, kaolin, nano talcum powder and hexamethylcyclotrisiloxane, magnetically stirring at 500rpm for 10min, ultrasonically dispersing for 20min, adding emulsified silicone oil, propylene glycol butyl ether and polydimethylsiloxane, magnetically stirring at 500rpm for 10min, ultrasonically dispersing for 10min, stopping ultrasonic dispersion, and finally filtering by a 100-mesh filter screen to obtain the epoxy resin.

The beneficial effects of the invention mainly include, but are not limited to, the following aspects:

1. the method of clay mixing and stirring is thoroughly changed, and firstly, the traditional conventional injection type method of stirring in a stirring tank is changed into the traditional diffusion type method of stirring in a premixing tank, and then the mixed materials enter the stirring tank for secondary mixing and stirring, so that the mixing and stirring effect is better and more thorough. The clay is only contacted with the limited surface area of the oil after being injected in the traditional mode, and the clay is stirred after being piled up in the limited area, so that caking is easy to generate, and the effect is natural and bad.

2. The mode that fluid got into also takes place thoroughly change, and traditional fluid is in the injection agitator tank of nature formula, and in the present is in the injection of utilizing fluid self with horizontal inscribed formula premix tank, utilizes the vortex that produces to improve stirring effect, is V type vortex form in the fluid premix tank again, and carclazyte and the area of contact of fluid are bigger, and is mixed more evenly.

3. The coating can prevent the adhesion of oil and clay, even if clay has a small amount of caking, the coating can not adhere to the inner wall and can not cause the increase of sedimentation when being premixed in a premixing tank; the caking is in stirring motion state all the time, and the size of caking can reduce gradually along with continuous stirring removal volume.

4. In the raw material selection of the coating, the nano talcum powder and the nano graphite can reduce the friction force of the coating and improve the smoothness; the nano titanium dioxide can improve stability and ageing resistance, and avoid the paint from being damaged and falling off; calcined kaolin is used as a binder, and can also improve corrosion resistance; the epoxy resin has the advantages of good adhesive force, excellent corrosion resistance, high mechanical strength and the like; according to the invention, by adding the nano inorganic material, the nano inorganic material can be closely embedded with all organic raw materials, so that the surface layer of the coating is smoother and smoother; the coating is formed into a film at normal temperature, has permeability and adhesive force, can be directly sprayed on the surface of a base material, realizes the function of integrating the bottom surface, has small friction force, smooth surface and strong hydrophobic property, is not easy to be adsorbed by clay, and reduces the aggregation of clay; the coating also has the characteristics of high hardness, impact resistance, high temperature resistance, good flexibility and the like.

Drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

FIG. 2 is a schematic enlarged view of the structure of the premix run tank according to the present invention.

Fig. 3 is a schematic top view of the structure of fig. 2.

Fig. 4 is a schematic structural view of a conventional stirring manner.

In the figure, the stirring motor 2 is arranged on the stirring tank 3, the blades 4 is arranged on the oil outlet 5, the pipeline 6 is arranged on the premixing tank 7, the conical hopper 8 is arranged on the oil injection pipe 9, the clay metering cylinder 10 is arranged on the sluice valve 11, the conical diffusion plate 12 is arranged on the clay agglomeration 13, the oil inlet 14 is arranged on the clay inlet pipe.

Detailed Description

The technical solutions of the present invention will be clearly and completely described below with reference to fig. 1 to 4, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1 to 4, the present invention includes a stirring tank 2; the bottom end of the stirring tank 2 is provided with an oil outlet 4 with a gate valve, and the top of the stirring tank 2 is provided with an oil inlet 13; the stirring motor 1 is arranged at the top end of the stirring tank 2, and the stirring motor 1 is in transmission connection with the blades 3 arranged in the stirring tank 2 through a stirring shaft; a cylindrical premixing tank 6 is arranged on one side of the stirring tank 2;

the top end of the premixing tank 6 is provided with a clay metering cylinder 9; the top end and the bottom end of the clay metering cylinder 9 are respectively communicated with the clay tank and the premixing tank 6 through gate valves 10; a conical diffusion plate 11 is arranged at the communication part of the clay metering cylinder 9 and the premixing tank 6;

the bottom end of the premixing tank 6 is provided with a conical hopper 7 coaxial with the premixing tank, and the bottom end of the conical hopper 7 is communicated with the lower part of the stirring tank 2 through a pipeline 5;

one side of the premixing tank 6 is provided with an oil injection pipe 8 communicated with the premixing tank 6, and the oil injection pipe 8 is communicated with the premixing tank 6 in a horizontal inscribed manner; the oil filling pipe 8 and the clay metering cylinder 9 are arranged diagonally;

The connection between the filler pipe 8 and the premixing tank 6 is set at the golden section ratio of 0.618 of the height of the premixing tank 6. The oil can keep good vortex, the pressure of the oil is insufficient when the position is too high, the oil is easy to lose speed, and the stirring and mixing effects are poor and incomplete when the position is too low.

The included angle between the conical hopper 7 and the premixing tank 6 is 110 degrees and less than a is less than 130 degrees.

The height of the premix tank 6 is higher than the height of the agitator tank 2, and the height of the premix tank 6 is twice the height of the clay metering cylinder 9. If the height is too high, the stroke of the oil vortex is too long, and the speed is reduced rapidly, so that the mixing is not facilitated; if the height is too low, the stroke of the vortex is short, the clay mixing and stirring time is short, and the effect is poor.

The top of the premixing tank 6 is provided with an openable sealing cover, and the operation can be convenient during the later overhaul and maintenance.

Working principle: the pre-mixing tank is arranged in the former process of the stirring tank, the oil is made to rotate at a high speed in the pre-mixing tank in a rotational flow mode by utilizing the conveying pressure of the oil, clay is quickly sucked into the pre-mixing tank under the action of internal vacuum and is radially diffused through the collision conical diffusion plate, the clay is dispersed and then is contacted with the oil flowing at a high speed to be immediately mixed, and the mixed oil enters the stirring tank through a height difference to be subjected to secondary conventional stirring.

The beneficial effects of the invention are as follows:

1. the method of clay mixing and stirring is thoroughly changed, and firstly, the traditional method of mixing and stirring by entering a stirring tank through the conventional injection of a clay inlet pipe 14 is changed into the traditional diffusion type method of mixing and stirring in a premixing tank, and then the mixed and stirred materials enter the stirring tank for secondary mixing and stirring, so that the mixing and stirring effect is better and more thorough. The clay is only contacted with the limited surface area of the oil after being injected in the traditional mode, and the clay is stirred after being piled up in the limited area, so that caking is easy to generate, and the effect is natural and bad.

2. The mode that fluid got into also takes place thoroughly change, traditional fluid is in the injection agitator tank through fluid import 13 gravity flow, and now in for utilizing the pressure of fluid self with the horizontal inscribed injection premix jar, utilize the vortex that produces to improve stirring effect, be V type vortex form in the fluid premix jar again, carclazyte and the area of contact of fluid is bigger, and is mixed more even.

3. The coating can prevent the adhesion of oil liquid and clay, even if clay is slightly agglomerated, the coating can not adhere to the inner wall during premixing in the premixing tank, and the deposition can not be increased; the caking is in stirring motion state all the time, and the size of caking can reduce gradually along with continuous stirring removal volume.

Compared with the traditional clay mixing mode, the invention has the following distinguishing points:

1. the clay is sucked in a radial large-area manner, namely, the conical diffusion plate can diffuse and distribute the clay when the clay is sucked in, so that the diffusion area of the clay is increased, and the clay is uniformly distributed and diffused when the clay is sucked into the tank body. The traditional clay entering mode is directional suction similar to injection, clay is not fully diffused to be in contact with the limited area of oil, the stirring speed is very limited, and clay caking 12 is easy to generate and adhere to and deposit due to long clay dispersing time period.

2. The entering mode of the oil liquid is horizontal inscribed rotational flow entering, namely the oil liquid is in a V-shaped rotational flow state in the tank body, the contact area of clay and the oil liquid is enlarged, and the mixing uniformity is improved. The traditional oil liquid is in a conventional horizontal state in the tank body, the contact area of the clay and the oil liquid is limited, the later-stage mixing and stirring effect is limited only by virtue of the stirring blades, caking can be generated immediately due to the influence of small contact area and other reasons when the clay and the oil liquid are initially contacted, and the caking clay is difficult to break up by stirring of a stirring shaft with limited speed at the later stage, so that the stirring effect is poor.

3. The inner wall of the tank body is provided with a non-adhesive coating, oil and clay are difficult to adhere, and even if caking is generated in the mixing process, the caking volume of the clay is not only increased continuously but also gradually reduced along with the action of movement and stirring because the caking is always in a continuous movement and stirring state, so that the tank has a fundamental effect. The traditional inner wall not only can be adhered with a layer of grease, but also can be adhered with clay blocks, the clay blocks are static after being adhered with the inner wall, the collision adsorption volume of the clay blocks which move is increased until the clay blocks cannot be adhered with the moving clay blocks until the volume and the dead weight of the clay blocks are increased, and thus the phenomenon of siltation and blockage is caused.

4. The coating inside the tank body is also convenient for switching operation among different grease categories, namely when different grease (such as peanut oil, corn oil, rapeseed oil and the like) is produced, the inner wall is cleaned without disassembling the machine, grease and carclazyte can not adhere under the protection effect of the coating, a large amount of shutdown cleaning maintenance operation time is saved, and the efficiency is also improved. The traditional mode is to shut down manual cleaning, the incomplete cleaning can also cause poor quality of the initial oil product, and the low-cost treatment is often carried out.

The invention is based on the original equipment, and various indexes of production are obtained through the control of the production process, including energy consumption, the use amount of the decoloring agent and the color of the decoloring oil, so as to find out the improvement direction of the process. The invention can fully mix the clay, reduce the consumption of the clay and improve the quality of the dehydrated oil. By combining the principle of hydrodynamics, the to-be-decolorized oil and the decolorizing agent (carclazyte) are rapidly mixed in the shortest time, and the maximum efficacy of the decolorizing agent is exerted to generate physical adsorption, so that the pigment is fixed on the decolorizing agent particles. Experiments show that the water has an influence on decolorization, in order to avoid the influence of the water, the pretreatment needs to reduce the water of the oil to be decolorized to the maximum extent, and high vacuum (-0.1 MPa) and low-temperature dehydration (105 ℃) are adopted to prevent the influence of high temperature on the oil to be decolorized.

The energy consumption of the invention is reduced by 20% after the invention is put into use, the dosage of the decoloring agent is reduced by 30%, the color of the product of the decoloring oil is stable, the market demand is met, and the production cost is greatly reduced. Taking 2 ten thousand tons of refined salad oil produced in one year as an example, in the decoloring procedure, the energy consumption can be saved every year: 50 kg steam/ton oil 20% x20000 tons/year = 200 tons steam; saving decoloring agent (carclazyte): 1 ton of oil is 6% (the using amount of the decoloring agent) is 30% 20000 tons/year=360 tons of decoloring agent, and the economic benefit is quite remarkable.

Example 2

An anti-blocking high-performance coating is prepared from the following raw materials in parts by weight:

The preparation method of the coating comprises the following steps:

1) Calcining kaolin at 650 ℃ for 60min, cooling to room temperature, grinding, and sieving with a 200-mesh sieve to obtain calcined kaolin;

2) Taking epoxy resin (solid content is 40%), adding diethyl phthalate, magnetically stirring at 300rpm for 5min, sequentially adding nano titanium dioxide, nano graphite, kaolin, nano talcum powder and hexamethylcyclotrisiloxane, magnetically stirring at 500rpm for 10min, ultrasonically dispersing (ultrasonic frequency is 28 kHz) for 20min, then adding emulsified silicone oil, propylene glycol butyl ether and polydimethylsiloxane, magnetically stirring at 500rpm for 10min, ultrasonically dispersing (ultrasonic frequency is 28 kHz) for 10min, stopping ultrasonic dispersion, and finally filtering by a 100-mesh filter screen to obtain the epoxy resin.

The application method of the paint comprises the following steps: spraying onto a premixing tank, a stirring tank, a conical diffusion plate and blades, and standing for 2 days at normal temperature to obtain an anti-adhesion coating; the coating thickness was 40 microns.

Coating performance test method

1. The hardness of the coating is measured by a stroke method; the adhesive force of the coating is measured by a Q65-67 type adhesive force measuring instrument; the impact strength of the coating was measured using an impact tester type 0153-3K 1; coating flexibility was measured using QTX-1 flexibility tester; the release properties of the coating were measured by the drop method using a CA-A type contact angle meter. The specific data are shown in Table 1.

TABLE 1

Index (I)	Control group (conventional polytetrafluoroethylene coating)	The invention is that
			Film Forming Property	Film formation	Film formation
Adhesion/rating (GB 1720-79)	1	1
			Flexibility/mm (GB 1731-79)	1	1
Impact strength/kg×cm (GB 1732-79)	47	63
			Anti-sticking (250 ℃ C.)	106.5	108.0
Hardness of	6H	7H

2. The present invention also examined% clay blocking rate { (blocking amount/total addition amount) ×100% on the substrate surface, blank group: no paint spray, control: conventional polytetrafluoroethylene coating was used, experimental group: the coating of the invention is adopted. Under the same conditions, the specific test results are shown in Table 2.

TABLE 2

Group of	Blocking ratio%
		Blank control group	3.7
Control group	1.1
		Experimental group	0.4

Conclusion: the hardness and strength of the conventional polytetrafluoroethylene coating are slightly poor, the conventional polytetrafluoroethylene coating is easy to damage and fall off, clay is easy to adhere to the coating, the coating is deposited, the generation of clay caking is increased, the blocking is increased, the use cost of clay is increased, and the performance of the coating is superior to that of the conventional polytetrafluoroethylene coating.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention.

Claims

1. A clay mixing device for grease decolorization comprises a stirring tank (2); the bottom end of the stirring tank (2) is provided with an oil outlet (4) with a gate valve, and the top of the stirring tank (2) is provided with an oil inlet (13); the stirring motor (1) is arranged at the top end of the stirring tank (2), and the stirring motor (1) is in transmission connection with the blades (3) arranged in the stirring tank (2) through a stirring shaft;

the method is characterized in that: a cylindrical premixing tank (6) is arranged at one side of the stirring tank (2);

the top end of the premixing tank (6) is provided with a clay metering cylinder (9); the top end and the bottom end of the clay metering cylinder (9) are respectively communicated with the clay tank and the premixing tank (6) through gate valves (10); a conical diffusion plate (11) is arranged at the communication part of the clay metering cylinder (9) and the premixing tank (6);

the bottom end of the premixing tank (6) is provided with a conical hopper (7) coaxial with the premixing tank, and the bottom end of the conical hopper (7) is communicated with the lower part of the stirring tank (2) through a pipeline (5);

one side of the premixing tank (6) is provided with an oil injection pipe (8) communicated with the premixing tank, and the oil injection pipe (8) is communicated with the premixing tank (6) in a horizontal inscribed manner; the oil filling pipe (8) and the clay metering cylinder (9) are diagonally arranged;

the premixing tank, the stirring tank, the conical diffusion plate and the blades are all provided with anti-adhesion coatings;

the preparation method of the anti-adhesion coating comprises the following steps: spraying the coating, and standing for 2-3d at normal temperature to obtain an anti-adhesion coating;

the coating is prepared from the following raw materials in parts by weight:

100 parts of epoxy resin, 20 parts of diethyl phthalate, 15 parts of nano titanium dioxide, 12 parts of nano graphite, 10 parts of kaolin, 5 parts of nano talcum powder, 8 parts of hexamethylcyclotrisiloxane, 1 part of emulsified silicone oil, 2 parts of propylene glycol butyl ether and 0.5 part of polydimethylsiloxane;

the preparation method of the coating comprises the following steps:

2) Placing epoxy resin in a container, adding diethyl phthalate, magnetically stirring for 5min, sequentially adding nano titanium dioxide, nano graphite, kaolin, nano talcum powder and hexamethylcyclotrisiloxane, magnetically stirring for 10min, ultrasonically dispersing for 20min, adding emulsified silicone oil, propylene glycol butyl ether and polydimethylsiloxane, magnetically stirring for 10min at 500rpm, ultrasonically dispersing for 10min, stopping ultrasonic dispersion, and finally filtering by a 100-mesh filter screen.

2. Clay mixing device for fat decolorization according to claim 1, characterized in that the connection of the filler pipe (8) to the premix tank (6) is arranged at a ratio of 0.618 golden section of the height of the premix tank (6).

3. Clay mixing device for fat decolorization according to claim 1, characterized in that the angle between the conical hopper (7) and the premix tank (6) is 110 ° < a < 130 °.

4. Clay mixing device for grease decolorization according to claim 1, characterized in that the height of the premix tank (6) is higher than the height of the agitator tank (2) and the height of the premix tank (6) is twice the height of the clay metering cylinder (9).

5. Clay mixing device for grease decolorization according to claim 1, characterized in that the top end of the premix tank (6) is provided with an openable sealing cover.

6. The clay mixing device for fat decolorization according to claim 1 wherein the anti-blocking coating has a thickness of 30-50 microns.