WO2020017853A1 - Industrial dryer - Google Patents

Abstract

The present invention relates to an industrial dryer in which hot air heated through a radiator enters a drum such that drying is performed, and the injection/blockage of steam in/from the radiator is controlled according to the temperature value of the hot air released through an exhaust pipe provided at one side of the drum, so as to uniformly maintain the internal temperature of the drum, thereby minimizing heat loss and optimizing the operating time of a boiler so as to reduce the consumption of a heat source, and thus the objective of the present invention is to improve efficiency through drying optimization. To this end, the present invention relates to an industrial dryer comprising: a drum (10); a radiator (20) provided at the upper end portion of the drum (10), and receiving the steam provided from the boiler so as to heat the air entering the drum (10) such that the hot air is provided to the drum (10); a ventilation motor (32) provided at the lower end portion of the drum (10), and having an exhaust pipe (34) so as to discharge, to the outside, the hot air entering the drum (10); a temperature sensor (42) provided at one side of the exhaust pipe (34) so as to measure the temperature of the hot air released through the exhaust pipe (34); and a humidity sensor (44) provided at one side of the exhaust pipe (34) so as to measure the humidity of the hot air, thereby sensing, according to a measured humidity value, that drying is complete.

Description

Industrial dryer

The present invention relates to an industrial dryer, and more specifically, the heat heated through a radiator is configured to enter the drum to dry, and according to the temperature value of the heat exhausted through the exhaust pipe configured on one side of the drum By controlling the injection and blocking of steam to the radiator, the internal temperature of the drum is kept uniform, thereby minimizing heat loss and optimizing the operating time of the boiler to save heat source consumption, thereby improving efficiency by drying optimization. It relates to a dryer.

In general, drying equipment is essential for the drying of agricultural and industrial materials and waste.

In order to save drying energy, efforts are being made to recycle (or reuse) the hot waste wet air discharged from the drying apparatus.

In order to improve the drying efficiency of the drying apparatus, the relative humidity of the wet air discharged from the drying apparatus is to maintain almost 90% or more, but the dried materials discharged together are also discharged with humidity.

In order to reduce the moisture content of the dry matter, the temperature of the exhaust air is increased and the humidity of the exhaust air is lowered.

That is, when it is desired to minimize the moisture content of the dry matter (12% or less), the exhaust air is about 100 ° C, and the relative humidity is about 10%.

For example, in the case of a three-stage rotary drying apparatus (Andritsu Co., Austria), the temperature of hot air introduced is about 400 ° C, and the temperature of the exhaust air reaches 100% relative humidity of 10%.

The discharged air passes through the dust collector and passes through the condenser and the heat exchanger, and is preheated to about 40 to 60 ° C. and re-introduced into the hot air burner.

Such a facility for reuse of waste heat is complicated, and the investment cost is enormous, but only about 5 to 15% of the input energy is actually recycled.

Recently, in the case of organic sludge recycling technology of POSCO E & C, the waste air removed from the condenser and preheated in the heat exchanger was introduced into the secondary drying apparatus of the gravity type grain dryer to dry the sludge secondly.

The disk drying apparatus using steam as a heat source was developed by Mitsubishi, Japan, and the disk rotates while the high pressure steam passes inside the disk, causing friction with the dry object.

The heat source of steam is transferred to the dry goods through the disk heat transfer and the friction of the dry goods, and the wet air generated during the drying of the dry goods is removed by the blowing air introduced with the dry goods.

However, the kiln, three-stage or radial multi-stage rotary dryer, which is dried by direct contact with the hot air, has a high drying speed, but a large amount of contaminated high temperature wet air is generated during the drying process.

Recycling contaminated hot humid air using heat exchangers, coolers and condensers is not economical.

In addition, in the case of a steam disc dryer which indirectly dries a dry matter by heat conduction using a heat source by steam, there is no possibility of contamination of the dry matter by a heat source, but the drying speed is slow and a scale similar to Nurungji occurs on the disk surface. The drying efficiency is lowered.

A heat exchanger and a condenser were used to recycle the hot waste wet air discharged directly from the hot air dryer.

However, the energy recovery efficiency is low compared to the installation cost of the heat exchanger and the condenser, and it is difficult to obtain sufficient economics.

Comparison table of hot air and steam drying method

division	Radial Rotary Indirect Heater (Waste Heat, Steam) Dryer	Radial Rotary Direct Heat Dryer	Indirect heat source (steam) dryer
Waste Air Generation	medium	versus	Ha
Rolling efficiency (consideration of heat loss due to heat conduction of heat transfer surface)	Ha	Prize	Prize
Dry heat source (inlet temperature)	Waste heat or steam (30 ~ 200 ℃)	Hot air (200 ~ 400 ℃)	Steam (50 ~ 200 ℃)
Scale generation	none	none	none
Drying of the inside of the dryer	has exist	has exist	none
Building Contamination and Carbonization Potential	none	has exist	none
Drying below 10 ℃	possible	possible	possible
Drying speed	Slow	speed	Slow
Heat exchanger capacity	No heat exchanger required	versus	No heat exchanger required
Condenser capacity	medium	versus	medium

Meanwhile, the laundry dryer market is largely divided into the domestic dryer market and the industrial dryer market. The domestic dryer product is being released as a drum washing machine capable of handling washing, dehydration and drying at once and a drying-only product having a drying function. In most cases, it is released in the form of drying only.

The industrial drying market can be subdivided into small and large industries according to the size of the maximum drying volume once. The dryer used for the small industry processes about 15 to 25 kg of dry matter based on throughput, while The dryer used can process more than 50kg at a time, and most of them are released in the form of 50kg, 100kg, 120kg.

Small industrial dryers are mainly used in small laundries or coin-operated commercial laundries. Large industrial dryers are used for drying large laundries and industrial buildings.

In addition, most industrial dryers of large size (more than 120kg) are imported and used, and domestic development is inadequate, and most of the imported products emphasize only drying speed, so energy saving technology is insufficient in imported products.

Looking at the prior art of the dryer provided in the country, the external air circulation drying apparatus of the washing machine of the Patent No. 501995 and the method of drying the laundry by circulating the air by checking the humidity and temperature of the air circulated during the drying administration In order to improve the effect, the temperature sensor for measuring the drying air temperature in the drum, the humidity sensor for measuring the humidity of the air circulating circulating duct, is installed between the temperature sensor and the humidity sensor on the air flow path. On the basis of the signals measured by the humidity sensor and the temperature sensor, the outdoor air circulation drying apparatus of the washing machine including a flow control means for selectively controlling the air flow circulated inside the drum and the air flow flowing in to the drum Is disclosed.

It selectively controls the air flow circulating inside the drum and the air flow introducing the outside air into the drum, and simultaneously measures the temperature and the humidity to improve the drying effect of the washing machine by optimizing the humidity and temperature of the circulated dry air. When reusing the air used in the construction, however, since the air contains a large amount of moisture, it is evaporated with a dry heater in the circulation duct and then supplied into the drum, thereby wasting energy consumed and external air. If it is introduced there is a problem that waste of energy occurs by heating it with a dry heater to a certain temperature.

Looking at another example of the prior art, the drum type washing machine of Patent No. 939866 has a suction motor for sucking air in the dryer body, a vent air duct connected to the suction motor, and a damper provided at one side wall of the exhaust side of the air vent duct. A suction duct connected to the exhaust duct, a heater connected to the suction duct by a damper provided on the discharge side of the suction duct, a drum connected to the discharge side of the heater, and a temperature sensor for controlling the temperature in the drum. And a humidity sensor for controlling humidity and a controller for controlling all the components, wherein the drum dryer includes a heat recoverer between the air duct and the suction duct and is installed at one side of the heat recoverer so that external fresh air flows naturally. The suction hole formed and the air introduced from the suction hole heat the heat recovery unit and then return to the heater. It was reheated and fed to the drum.

Looking in more detail with respect to the conventional industrial dryer, as shown in Figure 1, the industrial dryer (1) is composed of a door that opens and closes at one end, to form a space to be stored by putting the object to be dried inside Drum 10.

In addition, the radiator 20 is configured on one side of the drum 10.

In addition, the radiator 20 includes an injection pipe 22 configured at one side including a control valve to inject steam into the radiator 20, and condenses steam injected at the other side to discharge water. A discharge pipe 24 including a control valve is configured.

In addition, the lower end of the radiator 20 is configured with a thermometer 40 to check the temperature of the heat passing through the radiator 20 to the drum 10.

In addition, the other side of the drum 10 is provided with a ventilation motor 32 for providing a suction force so that the heated heat passing through the radiator 20 can pass through the interior of the drum 10.

In addition, one side of the ventilation motor 32 is composed of an exhaust pipe 34 for supporting the heat passing through the drum 10 to be discharged to the outside through the ventilation motor 32.

The industrial dryer 1 is used while consuming heat. In this case, the heat source is a steam radiator using a boiler using gasoline, a case, kerosene, a steam radiator using a gas boiler, a steam radiator using an electric boiler, or electricity. It is composed of high efficiency and automation of dryer or dryer which is used by using steam radiator, thermal radiator using heat medium, steam and thermal radiator using incineration boiler, and all other heat.

The industrial dryer 1 generates steam in a boiler, stores the steam as a steam main tank, and provides the steam to the radiator 20 in the steam main tank.

In addition, by putting a dry matter into the drum 10 of the industrial dryer 1, the drum 10 is rotated in the left and right directions, the valve of the injection pipe 22 configured on one side of the radiator 20 When is opened, steam is supplied to the radiator 20 through the injection pipe 22.

Subsequently, the steam injected through the injection pipe 22 circulates the radiator 20 to discharge the discharge pipe 24, and air is generated by the action of the ventilation motor 32 configured downward during the circulation process. Heat that is heated while passing through the radiator 20 is introduced into the drum 10, thereby drying the dried material of the drum 10.

At this time, in the thermometer 40 configured at the bottom of the radiator 20 to display the heat temperature passed through the radiator 20.

In addition, since the timer is configured in the industrial dryer 1 and the operator has estimated and set the drying time in advance through the timer, the buzzer of the drying completed in the state in which the timer value set in the timer is reached but the dried product is not dried. Is working.

Then, the operator confirms the dry state through the touch of the dry state of the dry matter, and if a further dry operation is to be performed, the timer is re-inferred and set again to perform the dry operation again.

However, after completion of the first drying operation, the door of the drum 10 is opened to check the drying state of the building, and the heat of the drum 10 is heat-exchanged with the outside due to the opening of the door, resulting in heat loss. In some cases, there is a problem that a worker has a risk of a safety accident such as a burn due to the opening of the drum 10.

Looking more closely, for example, put the clothes in the drum (10) begins to dry at 110 ℃ ~ 120 ℃.

Then, the clothes start to dry after about 12 minutes, and when it is about 45 minutes to about 55 minutes, the drying takes place completely.

At this time, when the first clothes are put into the drum 10 and the drying temperature is to be made constant until the drying is completed, in order to maintain the internal temperature of the drum 10 in this way a radiator It is necessary to provide steam at a constant temperature to 20, and there is a problem in that the maintenance cost is high by increasing the consumption of a heat source for operating the boiler to equalize the steam temperature.

In addition, there is a problem that the shrinkage of the clothes, that is, decrease and decrease, as the drying operation put into the drum 10, that is, the clothes are dried at a high temperature from the beginning to the completion of drying.

In addition, when steam is generated and discharged outside, the steam is a waste heat that can not be used, there is a problem that increases the energy consumption.

As proposed in order to solve the above problems, an object of the present invention, the heat is heated through the radiator is configured to enter the drum to dry, the steam in the radiator in accordance with the temperature value of the heat exhausted to the exhaust pipe Provides an industrial dryer that controls the injection and blockage of the drum to maintain a uniform internal temperature of the drum to minimize heat loss, and to optimize the operating time of the boiler to save heat source consumption, thereby improving efficiency by drying optimization. There is.

The present invention for achieving the above object, in the industrial dryer, a drum; A radiator configured at an upper end of the drum and receiving steam provided by a boiler to heat air entering the drum to provide heat to the drum; A ventilation motor configured at a lower end of the drum, the exhaust pipe being configured to discharge the heat entering the drum to the outside; A temperature sensor configured at one side of the exhaust pipe to measure a temperature of the heat exhausted through the exhaust pipe; And a humidity sensor configured at one side of the exhaust pipe to measure the humidity of the heat and sense that the drying is completed according to the measured humidity value.

In the present invention, the radiator, the injection pipe is configured on one side so that the steam generated in the boiler is injected into the radiator; And a discharge pipe configured at the other side, the trap valve configured to discharge the condensed water generated in the radiator to the outside; One side of the exhaust pipe, the solenoid valve for supplying or blocking the steam is made in accordance with the control signal by the sensing value measured by the temperature sensor or the humidity sensor;

In the present invention, the temperature sensor, when the heat temperature exhausted to the exhaust pipe is 75 ℃ ~ 85 ℃, block the steam entering the radiator; When the hot air temperature exhausted to the exhaust pipe is 55 ℃ ~ 65 ℃, it is set so that the hot air temperature is increased by injecting steam into the radiator;

In the present invention, it is preferable that the temperature sensor is set to dry if the set time is reached from the lower limit temperature and the upper limit temperature to the upper limit temperature from 2 minutes to 3 minutes.

In the present invention, the humidity sensor is preferably set to complete the drying when the measured humidity value is maintained for 5 to 10% for 10 to 20 seconds.

In the present invention, the temperature sensor, at the set lower limit temperature, the upper limit temperature, the time to reach the upper limit temperature from the lower limit temperature is 2 minutes to 3 minutes drying completion condition; And the humidity sensor, when the measured humidity value is maintained for 5 to 10% for 10 to 20 seconds, it is determined that the drying is complete when all of the drying completion conditions are satisfied.

In the present invention, when the drying is completed through a temperature sensor or a humidity sensor, by performing a cooling process for a predetermined time, it is determined that the drying of the final dry is completed;

In the present invention, the temperature sensor is set to set the upper limit temperature and the lower limit temperature, so that when the hot air temperature outside the upper limit temperature or the lower limit temperature is measured, it is set to recognize that a failure occurs in the solenoid valve or trap valve; It is preferable.

In the present invention, the exhaust pipe, it is preferable to include an expansion pipe to reduce the flow rate of the heat exhausted from the drum to the exhaust pipe, to obtain accurate sensing values from the temperature sensor and humidity sensor configured on one side of the exhaust pipe; Do.

According to the invention, the heat heated through the radiator is configured to enter the drum to dry, and to control the injection and blocking of steam to the radiator in accordance with the temperature value of the heat exhausted to the exhaust pipe, the internal temperature of the drum By keeping it uniform within a certain range, minimizing heat loss, and optimizing the operating time of the boiler to save heat source consumption, it is effective to improve the efficiency by drying optimization.

1 is a schematic configuration diagram of a typical industrial dryer.

2 is a schematic configuration diagram of an industrial dryer according to the present invention.

Advantages and features of the present invention, and methods for achieving the same will be apparent with reference to the embodiments described below in detail with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Thus, in some embodiments, well known process steps, well known structures and well known techniques are not described in detail in order to avoid obscuring the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the text.

As used in the specification, inclusions and / or comprisings include the presence or addition of one or more other components, steps, operations and / or elements other than the components, steps, operations and / or elements mentioned. Use in the sense that does not exclude.

And, "and / or" includes each and all combinations of one or more of the items mentioned.

In addition, the embodiments described herein will be described with reference to cross-sectional and / or schematic diagrams, which are ideal illustrations of the invention.

Therefore, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in forms generated according to manufacturing processes.

In addition, each component in the drawings shown in the present invention may be shown to be somewhat enlarged or reduced in consideration of the convenience of description.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings (the same reference numerals are used for the same components as before), and detailed description thereof will be omitted.

As shown in FIG. 2, the industrial dryer 1 of the present invention includes a drum 10, a radiator 20, a ventilation motor 32, and a thermometer 40. It includes a temperature sensor 42 for measuring the temperature of the heat exhausted to one side.

The drum (10) serves to support the drying to be made by the input.

The radiator 20 receives the steam generated from the boiler, and performs a function of allowing the drying operation to be performed by allowing the air 10 heated from the outside to enter the drum 10.

In addition, the radiator 20 is configured with an injection pipe 22 and a discharge pipe 24 for injection of steam generated from the boiler and discharge of condensate.

In addition, the injection pipe 22 is configured with a solenoid valve 23 to be opened and closed in accordance with a control signal.

In addition, the discharge pipe 24 is configured to separate the water and condensate, the trap valve 25 for intermittent discharge so that the condensate generated in the radiator 20 is configured.

The solenoid valve 23 controls the injection amount and the blocking of steam injected into the injection pipe 22 according to a control signal, thereby controlling the amount of heat entering the drum 10. The internal temperature is controlled.

The trap valve 25 serves to discharge only the condensed water generated in the radiator 20 by steam entered through the solenoid valve 23.

The ventilation motor 32 is configured in the lower portion of the drum 10 to discharge the heat entered into the drum 10 to the outside to perform a function to smoothly perform the drying operation inside the drum 10 do.

In addition, one end of the ventilation motor 32 has an exhaust pipe 34 for supporting the internal air of the drum 10 sucked through the ventilation motor 32 to be discharged to the outside.

In addition, one side of the exhaust pipe 34, the temperature sensor 42 for measuring the temperature for the heat exhausted to the exhaust pipe 34 through the ventilation motor 32 is configured.

In addition, one side of the exhaust pipe 34 includes a humidity sensor 44 for measuring the humidity contained in the heat exhausted through the exhaust pipe (34).

In addition, one side of the exhaust pipe 34 is lowered the discharge rate of the heat discharged through the exhaust pipe 34 to more accurately measure the temperature and humidity for the exhaust heat through the temperature sensor 42 and the humidity sensor 44 Expansion portion 36 to be made.

As shown in FIG. 2, the expansion pipe 36 forms a section for inducing the diameter of the exhaust pipe configured at the ventilation motor 32 side to be larger than the exhaust pipe configured at the drum 10 side.

Accordingly, the expansion pipe 36 allows the speed of the heat discharged through the exhaust pipe having a small diameter to discharge the heat into the expanded exhaust pipe as the flow rate drops rapidly as the diameter of the expansion pipe 36 increases.

Therefore, the expansion of the exhaust pipe leads to a smooth measurement of temperature and humidity with respect to heat at which the flow rate is dropped.

That is, the exhaust pipe 34 is configured to sequentially expand the expansion portion 36, the temperature sensor 42, the humidity sensor 44 and the ventilation motor 32 from the front end, based on the exhaust direction of the heat, the ventilation The heat entering the inside of the drum 10 by the action of the motor 32 is discharged to the exhaust pipe 34.

In addition, the expansion pipe 36 reduces the flow rate of the heat rapidly through the exhaust pipe 34 to reduce the flow rate of the heat.

In addition, the heat flow rate is reduced by the expansion pipe 36 is measured by the temperature sensor 42 and the humidity sensor 44 configured on one side of the exhaust pipe 34 and the humidity included in the heat By improving the accuracy of the control, the control of injecting and blocking steam to the radiator 20 is more accurate.

Accordingly, when the injection and blocking of steam to the radiator 20 is made correctly, the internal temperature of the drum 10 is kept constant and uniform, minimizing heat loss and optimizing the operating time of the boiler to save heat source consumption. Thus, the efficiency is improved by drying optimization for the industrial dryer.

Looking at the operating state of the industrial dryer configured as described above are as follows.

First, the dry matter is put into the drum 10, and the door configured to the front of the drum 10 is closed to seal the inside of the drum 10.

Then, when the power is turned on (ON) through the control panel configured on one side of the industrial dryer 1, the drum 10 is rotated.

In addition, the steam generated in the boiler is injected through the injection tube 22 of the radiator 20.

In addition, by the action of the ventilation motor 32, the heated air while the outside air passes through the radiator 20 enters into the drum 10, and heat exchanges with the dry matter introduced into the drum 10. And the heat is lowered by passing through the dry matter is discharged to the outside through the exhaust pipe (34).

In addition, the temperature of the heat discharged through the temperature sensor 42 configured on one side of the exhaust pipe 34 of the ventilation motor 32 is measured.

Accordingly, at the upper limit temperature (80 ° C.) and the lower limit temperature (60 ° C.) set in the temperature sensor 42, the time for reaching the upper limit temperature from the lower limit temperature is calculated, and the time of arrival thus calculated is the drying time range If it reaches within (approximately 2 minutes 30 seconds), it is determined that drying is completed.

In addition, when the moisture content in the humidity value measured by the humidity sensor 44 configured on one side of the exhaust pipe 34 is maintained for more than 10 to 20 seconds (about 15 seconds) within 5 to 10% (about 8%), It is judged that drying is completed.

As a result, when the time from the lower limit temperature to the upper limit temperature in the temperature sensor 42 is maintained within approximately 2 minutes 30 seconds, and the humidity value of the humidity sensor 44 is maintained within 8% for 15 seconds or more, drying is completed. It is judged that the drying operation is automatically stopped.

Then, when it is determined that the drying operation is completed, a cooling time of 2 to 4 minutes (approximately 3 minutes) is picked up so that the operator can prevent the occurrence of a safety accident due to a burn or the like.

In addition, when the temperature value measured by the temperature sensor 42 reaches a predetermined range, the steam supplied to the radiator 20 is paused.

In this case, the temperature value at which steam supply is paused is 70 degreeC-90 degreeC (about 80 degreeC).

For example, when the temperature value measured by the temperature sensor 42 is 80 ° C., the solenoid valve 23 of the injection pipe 22 configured at one side of the radiator 20 is switched from the open to the intermittent direction and provided through the boiler. The steam to be provided to the radiator 20 is paused.

Subsequently, when the temperature value measured by the temperature sensor 42 is 60 ° C., a control signal is transmitted to the solenoid valve 23, and the solenoid valve 23 is switched from the intermittent to the open direction to stop. Allow steam to be resupplied.

Through such a process of blocking and resupplying the steam, the operation of the boiler is paused to minimize the heat source consumption.

To better understand the drying process, the clothes are put into the drum 10, and the solenoid valve 23 is opened by opening the solenoid valve 23 until the temperature of the heat is reached to 80 ° C through the temperature sensor 42. 20) allow the circulation of steam to occur.

When the temperature reaches 80 ° C., the solenoid valve 23 is interrupted to interrupt the supply of steam to the radiator 20.

When the temperature value of the heat measured by the temperature sensor 42 reaches 60 ° C., the intermittent solenoid valve 23 is opened to resupply steam.

division	time
Cycle No	Rise (80 ℃)	Lowering (60 ℃)
1st	22 minutes	2 minutes 30 seconds
2st	3 minute, 24 seconds	3 minute, 45 seconds
3st	2 minutes 3 seconds	2 minutes 13 seconds
4st	2 minutes 1 second	2 minute, 20 seconds
5st	2 minutes 2 seconds	2 minute, 22 seconds
6st	2 minutes 1 second	2 minutes 20 seconds

As can be seen from the table above, it can be seen that in the initial cycle, the time for raising the internal temperature of the initial drum 10 is inevitably long.

In addition, although there is a time difference until 2st and 3st, it can be seen that there is no difference in time because the amount of moisture contained in clothes.

Afterwards, the similar time difference from 4st to 6st indicates that the heat exchange between clothes and heat is loose as the clothes are dried.

Therefore, when the time to reach the upper limit temperature from the lower limit temperature of the temperature sensor 42 is within 2 minutes and 30 seconds, and the humidity rate of the humidity sensor 44 is maintained within 8% for 15 seconds or more, the drying is completed. In addition, the buzzer will sound so that the operator can recognize it.

As described above, both the drying completion condition by the time reached from the lower limit temperature set through the temperature sensor 42 to the upper limit temperature and the drying completion condition by the humidity rate and humidity rate maintenance time set by the humidity sensor 44 are both When it is satisfied, dry finish condition is used.

Of course, the present invention is not limited thereto, and even if only one of the drying completion conditions by the temperature sensor 42 or the drying completion conditions by the humidity sensor 44 is satisfied, the drying completion conditions can be set.

In the above-described drying conditions, the operator or the manager may set the setting value and set the drying conditions according to the kind of the dry matter.

On the other hand, it is possible to determine whether the control of the solenoid valve 23 and the trap valve 25 configured in the radiator 20 through the temperature sensor 42.

That is, a long time use may cause an opening or an interruption defect due to a foreign matter such as a scale in the solenoid valve 23 or the trap valve 25, and thus, the solenoid valve 23 or the trap valve 25 may When a defect occurs, the operator can be recognized through a buzzer, etc., so as to correct the defect early, thereby reducing the maintenance cost of the device.

For example, when the drying is completed, a continuous sound of "beep" is sent from the buzzer, and if a defect occurs, the buzzer of "beep ~ beep ~ beep ~" is transmitted from the buzzer.

In addition, referring to a method of determining whether the solenoid valve 23 or the trap valve 25 is defective, for example, when a failure occurs in the solenoid valve 23 to maintain an open state, As the steam is continuously provided to the radiator 20, when the hot air temperature measured by the temperature sensor 42 is measured to be higher than the upper limit, that is, 80 ° C. or higher and 90 ° C. or higher, it is recognized as a failure.

In addition, when the solenoid valve 23 is not opened properly, steam is not resupplied to the radiator 20, so that the temperature of the heat measured by the temperature sensor 42 is within a lower limit of 60 ° C. or less. If 50 ℃ is measured, it is recognized as bad.

In addition, even in the case of the trap valve 25, when the opening is poor, the temperature of the heat due to the condensed water generated in the radiator 20 is not discharged to recognize whether or not defective.

What has been described above is only one embodiment for implementing the industrial dryer, the present invention is not limited to the above-described embodiment. Those skilled in the art will appreciate that various modifications can be made without departing from the spirit of the invention.

Claims (11)

1. In the industrial dryer,

   Drum 10;

   A radiator (20) configured at an upper end of the drum (10) and receiving steam provided by a boiler to heat air entering the drum (10) so that heat is provided to the drum (10);

   A ventilation motor 32 configured at a lower end of the drum 10 and configured to have an exhaust pipe 34 configured to discharge heat entering the drum 10 to the outside;

   A temperature sensor (42) configured at one side of the exhaust pipe (34) to measure the temperature of the heat exhausted through the exhaust pipe (34); And

   A humidity sensor 44 configured at one side of the exhaust pipe 34 to measure humidity of the heat and sense that drying is completed according to the measured humidity value;

   Industrial dryer comprising a.
2. The method of claim 1, wherein the radiator 20,

   It is configured on one side, the injection pipe 22 to inject steam generated in the boiler to the radiator 20; And

   A discharge pipe (24) configured on the other side and configured with a trap valve (25) to discharge the condensed water generated in the radiator (20) to the outside;

   One side of the exhaust pipe 34, the solenoid valve 23 to supply or block steam in accordance with the control signal by the sensing value measured by the temperature sensor 42 or the humidity sensor 44;

   Industrial dryer comprising a.
3. The method according to claim 1, wherein the temperature sensor 42,

   Blocking the steam entering the radiator 20 when the heat temperature exhausted to the exhaust pipe 34 is 75 ° C. to 85 ° C .;

   Setting the hot air temperature to be increased by injecting steam into the radiator 20 when the hot air exhausted to the exhaust pipe 34 is 55 ° C. to 65 ° C .;

   Industrial dryer, characterized in that the
4. The method according to claim 1, wherein the temperature sensor 42,

   If the time to reach the upper limit temperature from the set lower limit temperature and the upper limit temperature from the lower limit temperature is 2 minutes to 3 minutes, the drying is completed;

   Industrial dryer, characterized in that the
5. The method of claim 1, wherein the humidity sensor 44,

   Setting to complete drying when the measured humidity value is maintained for 5 to 10% for 10 to 20 seconds;

   Industrial dryer, characterized in that the
6. The method according to claim 1,

   The temperature sensor 42, the drying completion condition if the time to reach the upper limit temperature from the lower limit temperature to the upper limit temperature is set to 2 minutes to 3 minutes; And

   The humidity sensor 44, when the measured humidity value is maintained for 5 to 10% for 10 to 20 seconds, determine that the drying is complete when all the drying completion conditions are satisfied;

   Industrial dryer characterized in that.
7. The method according to claim 4,

   When the drying is completed through the temperature sensor 42 or the humidity sensor 44, by performing a cooling process for a predetermined time, it is determined that the drying of the final drying is completed;

   Industrial dryer characterized in that.
8. The method according to claim 2,

   The temperature sensor 42 sets an upper limit temperature and a lower limit temperature, and when the heat temperature outside the upper limit temperature or the lower limit temperature is measured, it is recognized that a failure occurs in the solenoid valve 23 or the trap valve 25. Set to make;

   Industrial dryer characterized in that it is.
9. The exhaust pipe 34 of claim 1,

   The flow rate of the heat exhausted from the drum 10 to the exhaust pipe 34 is reduced, so that the accurate sensing value can be obtained from the temperature sensor 42 and the humidity sensor 44 configured on one side of the exhaust pipe 34. Pipe 36;

   Industrial dryer comprising a.
10. The method according to claim 5,

    When the drying is completed through the temperature sensor 42 or the humidity sensor 44, by performing a cooling process for a predetermined time, it is determined that the drying of the final drying is completed;

    Industrial dryer characterized in that.
11. The method according to claim 6,

    When the drying is completed through the temperature sensor 42 or the humidity sensor 44, by performing a cooling process for a predetermined time, it is determined that the drying of the final drying is completed;

    Industrial dryer characterized in that.

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