CN114279172A - Novel efficient energy-saving environment-friendly airflow drying system - Google Patents
Novel efficient energy-saving environment-friendly airflow drying system Download PDFInfo
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- CN114279172A CN114279172A CN202111608483.XA CN202111608483A CN114279172A CN 114279172 A CN114279172 A CN 114279172A CN 202111608483 A CN202111608483 A CN 202111608483A CN 114279172 A CN114279172 A CN 114279172A
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Abstract
The invention discloses a novel efficient, energy-saving and environment-friendly air flow drying system which comprises a feeder, a material throwing device, an air heating device, an air flow drying pipeline, a cyclone separator, a material receiving hopper, an induced draft fan, an air conveying system and a tail gas waste heat recovery device.
Description
Technical Field
The invention relates to the technical field of drying equipment for powder and particle loose materials, in particular to a novel efficient, energy-saving and environment-friendly airflow drying system.
Background
At present, a pipeline airflow conveying system is generally adopted for processing powder and particle loose materials, namely, airflow is utilized to carry the materials to flow in a pipeline, the drying, cooling, screening, grading and other processing of the materials can be realized in the flowing process, for example, when starch is produced, the moisture content of the starch must be reduced in order to ensure the starch quality in the subsequent transportation and storage, the produced starch needs to be dried, at present, an airflow drying system is generally adopted for drying the starch, the airflow drying system utilizes hot air to carry the starch to flow in the pipeline, the starch is dried in the flowing process, the starch and the hot air always flow in the pipeline in the whole process, the production environment cannot be influenced, the airflow drying has high drying efficiency and low energy consumption, the dried starch can be directly communicated with an air conveying pipeline for the starch conveying and the subsequent packaging, the production cost is low.
However, the existing airflow drying system has the following defects:
1. air directly gets into heating system heating, and the impurity in the air mixes in the starch material easily, causes black impurity to appear in the starch, influences starch quality.
2. When the air is heated by the existing airflow drying system, necessary temperature control measures are lacked, the dried starch is inflammable, the starch is easy to burn in a pipeline when meeting high-temperature air along with the rise of the temperature of the starch in the drying process, explosion hazards are generated, and the existing airflow drying system is lacked necessary fire extinguishing measures.
3. The moisture content of the dried starch is not easy to control and mainly depends on manual off-line detection, and the off-line detection time is long and not accurate enough, so that the moisture content of the dried starch is not uniform, and the product quality is not uniform.
4. The tail gas discharged after the starch is dried still contains a large amount of heat, the tail gas of the existing airflow drying system is directly discharged, energy waste is caused, and the tail gas containing the heat also pollutes the atmosphere.
5. Current air current drying system when utilizing steam to heat the air, produces a large amount of comdenstions water, and the comdenstion water contains a large amount of heats, and the comdenstion water directly discharges, causes the energy extravagant.
Disclosure of Invention
In summary, in order to overcome the defects of the prior art, the invention provides a novel efficient, energy-saving and environment-friendly air flow drying system, which preheats air by using waste heat of tail gas, realizes recycling of the waste heat of the tail gas after air flow drying, preheats air again by using waste heat of condensed water, realizes recycling of the waste heat of the condensed water, and preheats air by using the waste heat of the tail gas and the waste heat of the condensed water, thereby effectively saving steam required by the air flow drying system for heating air, reducing energy consumption of air flow drying, saving energy and reducing air flow drying cost.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a novel air current drying system of energy-efficient environmental protection, wherein: comprises a feeder, a thrower, an air heating device, an airflow drying pipeline, a cyclone separator, a receiving hopper, a draught fan, an air conveying system and a tail gas waste heat recovery device,
a feeder, wherein a feed inlet of the feeder is communicated with a material source to be dried, a discharge outlet of the feeder is communicated with a feed inlet of a thrower, a discharge outlet of the thrower is communicated with a feed inlet of an airflow drying pipeline, the feeder and the thrower send the material to be dried into the airflow drying pipeline,
an air heating device, the air inlet of which is communicated with the tail gas waste heat recovery device, the air outlet of which is communicated with the airflow drying pipeline, the medium inlet of which is communicated with a steam source, heats the air by utilizing steam to provide high-temperature air for the airflow drying,
an airflow drying pipeline, wherein high-temperature air and materials to be dried flow in the airflow drying pipeline, the materials are dried in the flowing process,
the cyclone separator is used for separating the dried material from air, a feed inlet of the cyclone separator is communicated with a discharge outlet of the airflow drying pipeline, a discharge outlet of the cyclone separator is communicated with a material receiving hopper, an air outlet of the cyclone separator is communicated with an air inlet of the pulse dust collector,
a material receiving hopper for collecting the dried material, a material inlet of the material receiving hopper is communicated with a material outlet of the cyclone separator, a material outlet of the material receiving hopper is communicated with an air conveying system,
the pulse dust collector is used for removing light and fine dust materials in the tail gas, an air inlet of the pulse dust collector is communicated with an air outlet of the cyclone separator, an air outlet of the pulse dust collector is communicated with an air inlet of the induced draft fan, a discharge port of the pulse dust collector is communicated with an air conveying system, and the air conveying system is used for conveying the dried materials;
the induced draft fan provides power for the flow of high-temperature air and materials;
the medium inlet of the tail gas waste heat recovery device is communicated with the air outlet of the draught fan, the air inlet of the tail gas waste heat recovery device is communicated with the atmosphere, the medium outlet of the tail gas waste heat recovery device is communicated with the atmosphere, the air outlet of the tail gas waste heat recovery device is communicated with the air inlet of the air heating device, and the tail gas waste heat recovery device is used for recovering waste heat in tail gas and utilizing the waste heat of the tail gas to preheat air.
The technical scheme of the invention can be realized by that the air heating device comprises a heating shell, a steam radiator and a condensation radiator, the heating shell is a conical cylindrical structure with openings at two ends, one end of the heating shell is large in opening, the other end of the heating shell is small in opening, the end with the small opening is an air outlet of the air heating device, the end with the large opening is an air inlet of the air heating device, the condensation radiator and the steam radiator are sequentially arranged in the heating shell from the air inlet to the air outlet, the air inlet of the steam radiator is communicated with a steam source, a condensed water outlet of the steam radiator is communicated with a water inlet of the condensation radiator through a pipeline, and a water outlet of the condensation radiator is communicated with a condensed water tank.
The technical scheme of the invention can also be realized by arranging a temperature sensor on the heating shell, wherein the temperature sensor is positioned at one end of the heating shell close to the air outlet of the air heating device, an air inlet regulating valve is arranged on a pipeline for communicating the steam source with the air inlet of the steam radiator, the temperature sensor is electrically connected with the air inlet regulating valve to realize the linkage control of the temperature sensor and the air inlet regulating valve, and the temperature sensor detects and displays the air flow temperature at the air outlet of the heating shell and controls the opening and closing of the air inlet regulating valve according to the air flow temperature.
The technical scheme of the invention can also be realized by connecting the steam source with a fire extinguishing air inlet on the heating shell through a fire extinguishing pipeline, wherein the fire extinguishing air inlet is positioned at one end of the heating shell close to an air outlet of the air heating device, the fire extinguishing pipeline is provided with a fire extinguishing valve, and the fire extinguishing valve is electrically connected with the temperature sensor to realize the linkage control of the arc extinguishing valve and the temperature sensor.
The technical scheme of the invention can also be realized in such a way that an air filter is arranged on an air inlet of the air heating device, the air filter comprises a plurality of filter screens arranged in the air inlet of the air heating device, and the plurality of filter screens are sequentially arranged along the flowing direction of the air in the heating shell.
The technical scheme of the invention can also be realized by adopting the feeding auger as the feeder, arranging a moisture detector on the discharge hole of the receiving hopper, electrically connecting the moisture detector with a power motor of the feeder, detecting the moisture content of the material flowing out of the discharge hole of the receiving hopper by the moisture detector, and controlling the on-off and the rotating speed of the power motor of the feeding auger according to the moisture content.
The technical scheme of the invention can also be realized by adopting a tubular heat exchanger, wherein a shell side air inlet of the tubular heat exchanger is communicated with an air outlet of an induced draft fan, a shell side air outlet of the tubular heat exchanger is communicated with the atmosphere, a tube side air inlet of the tubular heat exchanger is communicated with the atmosphere, and a tube side air outlet of the tubular heat exchanger is communicated with an air inlet of an air heating device.
The technical scheme of the invention can also be realized by arranging a tail gas dust detector on a pipeline for communicating an air outlet of the pulse dust collector with an air inlet of the induced draft fan, wherein the tail gas dust detector is respectively electrically connected with a power motor of the induced draft fan and a power motor of the feeder, the tail gas dust detector is used for detecting and displaying the powder content in the tail gas, and when the powder content in the tail gas is higher than a set value, the induced draft fan and the feeder are controlled to stop.
The technical scheme of the invention can also be realized in such a way that the receiving hopper is provided with a material level meter which displays and warns the material level of the receiving hopper.
The invention has the beneficial effects that:
1. the invention is provided with a tail gas waste heat recovery device, which utilizes the tail gas waste heat to heat cold air to realize primary air preheating, in cold winter, the temperature of the tail gas waste heat of an airflow drying system is usually about 50 ℃, the temperature of the air preheated by the tail gas waste heat can reach about 30 ℃, and the temperature of the air entering the air heating device can be effectively improved.
2. According to the air heating device, the air filter is arranged at the air inlet of the heating shell, the air preheated by the tail gas waste heat recovery device is filtered by the air filter and then enters the air heating device for heating, the air filter filters impurities in the air, so that the air impurities can be effectively prevented from entering an airflow drying pipeline, the starch material is prevented from being polluted by the air impurities, the number of black spots in the starch product is reduced, and the product quality is improved.
3. The heating shell at the air outlet of the air heating device is provided with a temperature sensor which is electrically connected with an air inlet regulating valve of a steam radiator, the air input of the steam radiator can be controlled according to the temperature of the air in the heating shell, when the temperature of the heated air is overhigh, the air input of the steam can be properly reduced, when the temperature of the heated air is overlow, the air input of the steam can be properly increased, thereby realizing the control of the air temperature required by air flow drying, the heating shell of the air heating device is provided with a fire extinguishing air inlet, a steam source is connected with the fire extinguishing air inlet through a fire extinguishing pipeline, the opening and closing of a fire extinguishing valve on the fire extinguishing pipeline is controlled through the temperature sensor on the heating shell, the temperature sensor sets the fire extinguishing temperature, when the temperature of the heated air in the heating shell reaches a set value, the fire extinguishing valve is opened, and the steam source introduces steam into the heating shell, steam enters the airflow drying pipeline along with airflow, and the moisture in the steam increases the air humidity, so that the starch is prevented from catching fire due to high-temperature drying, and the safety production of the system is ensured.
4. The moisture detector is arranged to detect the moisture content of the dried starch material on line, the moisture detector is electrically connected with the power motor of the feeder, the power motor of the feeder can be adjusted according to the moisture content of the discharged material of the receiving hopper, when the moisture content of the starch material flowing out of the receiving hopper is high, the rotating speed of the power motor can be reduced, and the starch amount in the airflow drying pipeline is reduced, so that the starch material with better high-temperature airflow is dried. Thereby effectively improving the product quality and the product yield.
5. The invention is provided with the pulse dust collector, the tail gas dust detector is arranged on the pipeline between the air outlet of the pulse dust collector and the air inlet of the induced draft fan, the powder content in the tail gas is reduced through the pulse dust collector, the recovery rate of starch products is improved, the tail gas can be discharged up to the standard, the dust pollution generated by the tail gas discharge is reduced, the powder content in the tail gas is detected and displayed on line through the tail gas dust detector, when the powder content in the tail gas is overhigh, the induced draft fan and the feeder can be automatically alarmed and closed, the system is stopped and then is checked and treated, so that the tail gas with overhigh dust is prevented from being discharged into the atmosphere, the atmospheric pollution is reduced, and the environment is protected.
6. The invention has simple structure, convenient use and low cost, can effectively reduce the energy consumption required by airflow drying of materials such as starch and the like, reduce the airflow drying cost of the materials, improve the production efficiency and effectively improve the quality of the dried materials.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in figure 1, a novel high-efficiency energy-saving environment-friendly air flow drying system comprises a feeder 1, a material throwing device 2, an air heating device 3, an air flow drying pipeline 4, a cyclone separator 5, a material receiving hopper 6, an induced draft fan 7, an air conveying system 8 and a tail gas waste heat recovery device 9, wherein the feeder 1 adopts a feeding auger, a feeding hole of the feeder 1 is communicated with a material source to be dried, a discharging hole of the feeder 1 is communicated with a feeding hole of the material throwing device 2, a discharging hole of the material throwing device 2 is communicated with a feeding hole of the air flow drying pipeline 4, the feeder 1 and the material throwing device 2 convey the material to be dried into the air flow drying pipeline 4, an air inlet of the air flow drying pipeline 4 is communicated with an air outlet of the air heating device 3, an air inlet of the air heating device 3 is communicated with an air outlet of the tail gas waste heat recovery device 9, a medium inlet of the air heating device 3 is communicated with a steam source 10, air heating device 3 utilizes steam to heat the air, provides high temperature air for the air current is dry, air heating device 3 including heating casing 31, steam radiator 32 and condensation radiator 33, heating casing 31 be both ends open-ended toper tubular structure, its one end opening is big, its other end opening is little, the little one end of its opening is air heating device 3's gas outlet, the big one end of its opening is air heating device 3's air inlet, air heating device 3's air inlet on be provided with air cleaner 17, air cleaner 17 including arranging a plurality of filter screens in air heater 3's air inlet, a plurality of filter screens are arranged in proper order along the flow direction of the air in the heating casing 31. The heating shell 31 is internally provided with a condensation radiator 33 and a steam radiator 32 from an air inlet to an air outlet in sequence, the air inlet of the steam radiator 32 is communicated with the steam source 10, a condensed water outlet of the steam radiator 32 is communicated with a water inlet of the condensation radiator 33 through a pipeline, and a water outlet of the condensation radiator 33 is communicated with a condensed water tank. Heating shell 31 on be provided with temperature sensor 12, temperature sensor 12 is located the one end that is close to 3 gas outlets of air heating device of heating shell 31, the pipeline of steam source 10 and steam radiator 32's air inlet intercommunication on be provided with air inlet regulating valve 13, temperature sensor 12 be connected with air inlet regulating valve 13 electricity, realize temperature sensor 12 and air inlet regulating valve 13's chain control, temperature sensor 12 detects and shows the air current temperature of heating shell 31's gas outlet department to according to opening and close and open the size of this air current temperature control air inlet regulating valve 13. Air heating device 3's heating casing 31 on be provided with air inlet 15 of putting out a fire, air inlet 15 of putting out a fire be located heating casing 31 the one end that is close to 3 gas outlets of air heating device, steam source 10 connect the air inlet 15 of putting out a fire on the heating casing 31 through fire-extinguishing pipe way 14, fire-extinguishing pipe way 14 on be provided with fire-extinguishing valve 16, fire-extinguishing valve 16 be connected with temperature sensor 12 electricity, realize fire-extinguishing valve 16 and temperature sensor 12's chain control.
The discharge port of the airflow drying pipeline 4 is communicated with the feed port of the cyclone separator 5, high-temperature air and materials to be dried flow in the airflow drying pipeline 4, the materials are dried in the flowing process, the airflow drying pipeline 4 is provided with an explosion venting port, the discharge port of the cyclone separator 5 is communicated with the feed port of the receiving hopper 6, the discharge port of the receiving hopper 6 is communicated with the air conveying system 8, the cyclone separator 5 is used for separating the dried materials from the air, the air outlet of the cyclone separator 5 is communicated with the air inlet of the pulse dust collector 11, the discharge port of the pulse dust collector 11 is communicated with the air conveying system 8, the pulse dust collector 11 is used for removing light and fine dust materials in tail gas, the air conveying system 8 is used for conveying the dried materials, the receiving hopper 6 is used for collecting the dried materials, the discharge port of the receiving hopper 6 is provided with a moisture detector 18, the moisture detector 18 is electrically connected with the power motor of the feeder 1 to realize the linkage control of the moisture detector 18 and the power motor of the feeder 1, the moisture detector 18 detects the moisture content of the material flowing out of the discharge hole of the receiving hopper 6, and controls the opening and closing and the rotating speed of the power motor of the feeding auger according to the moisture content. The material receiving hopper 6 is provided with a material level meter 20, and the material level meter 20 displays and warns the material level of the material receiving hopper 6.
The air outlet of the pulse dust collector 11 is communicated with the air inlet of the draught fan 7, and the air outlet of the draught fan 7 is communicated with the medium air inlet of the tail gas waste heat recovery device 9. The pipeline that the air outlet of pulse dust collector 11 and the air intake of draught fan 7 communicate on be provided with tail gas dust detector 19, tail gas dust detector 19 is connected with the driving motor electricity of draught fan 7 and feeder 1 respectively, utilizes tail gas dust detector 19 to detect and show the powder content in the tail gas, when tail gas powder content was higher than the setting value, control draught fan 7 and feeder 1 shut down. The air inlet of the tail gas waste heat recovery device 9 is communicated with the atmosphere, the medium outlet of the tail gas waste heat recovery device 9 is communicated with the atmosphere, the air outlet of the tail gas waste heat recovery device 9 is communicated with the air inlet of the air heating device 3, and the tail gas waste heat recovery device 9 is used for recovering waste heat in tail gas and preheating air by utilizing the waste heat of the tail gas. The tail gas waste heat recovery device 9 adopts a tubular heat exchanger, a shell side air inlet of the tubular heat exchanger is communicated with an air outlet of the draught fan 7, a shell side air outlet of the tubular heat exchanger is communicated with the atmosphere, a tube side air inlet of the tubular heat exchanger is communicated with the atmosphere, and a tube side air outlet of the tubular heat exchanger is communicated with an air inlet of the air heating device 3.
When the starch drying device is used, starch to be dried enters a feeding hole of the feeder 1, the induced draft fan 7 is started, the power motor of the feeder 1 is started, the starch to be dried is conveyed to the material throwing device 2 under the action of the feeding auger, and the starch to be dried is thrown into the air flow drying pipeline 4 under the action of the material throwing device 2.
Under the action of the induced draft fan 7, cold air firstly enters from a tube side air inlet of a tube side heat exchanger serving as a tail gas waste heat recovery device 9, the cold air exchanges heat with the tail gas in the tube side heat exchanger, the cold air is preheated and heated for the first time, the tail gas is discharged to the atmosphere from a shell side air outlet of the tube side heat exchanger after being cooled, the air after being preheated and heated enters from an air inlet of the air heating device 3, an air inlet adjusting valve 13 is opened, steam generated by a steam source 10 enters a steam radiator 32 of the air heating device 3, the steam is condensed, condensed water enters a condensing radiator 33, the air after being preheated and heated for the first time is firstly filtered by an air filter 17 arranged at an air inlet of the air heating device 3, impurities in the air are filtered, clean air enters into a heating shell 31 and firstly passes through the condensing radiator 33, and the condensed water in the condensing radiator 33 secondarily preheats the air, the air after secondary preheating passes through a steam radiator 32, the heat emitted by the steam radiator 32 is the largest, the air after secondary preheating is heated, the heated air flows out of an air outlet of the air heating device 3 and enters an airflow drying pipeline 4, high-temperature air and starch to be dried flow along the airflow drying pipeline 4 in the airflow drying pipeline 4, the high-temperature air exchanges heat with the starch, the starch is dried in the flowing process, the air and the dried starch flow out of a discharge port of the airflow drying pipeline 4 and enter a cyclone separator 5 through a feed port of the cyclone separator 5 for air-powder separation, the separated starch enters a receiving hopper 6 from the discharge port of the cyclone separator 5, the separated air enters a pulse dust collector 11 for dust removal, the pulse dust collector 11 collects the starch in tail gas, and the tail gas after dust removal enters a shell pass of a shell pass heat exchanger from an air outlet of a draught fan 7, in the shell-and-tube heat exchanger, the tail gas of the shell pass exchanges heat with the cold air of the tube pass, the cold air is preheated, and the tail gas is emptied after being cooled.
The heating shell 31 of the air heating device 3 is provided with the temperature sensor 12, the temperature sensor 12 detects and displays the temperature of the heated high-temperature air, the air inlet adjusting valve 13 can be adjusted according to the air temperature, the heated high-temperature air is lower than the set requirement, the air inlet adjusting valve 13 is adjusted to be large, the steam air inflow of the steam radiator 32 is increased, and when the heated high-temperature air is higher than the set requirement, the air inlet adjusting valve 13 is adjusted to be small, and the steam air inflow of the steam radiator 32 is reduced. When the heated high-temperature air is too high and the risk of starch combustion exists, the temperature sensor 12 controls the fire extinguishing valve 16 to be opened, the steam source 10 conveys steam into the heating shell 31 through the fire extinguishing pipeline 14, the steam enters the airflow drying pipeline 4 along with the high-temperature air, the moisture in the airflow drying pipeline 4 is increased, and therefore the risk of starch combustion and explosion is reduced.
A moisture detector 18 is arranged on a discharge port of a receiving hopper 6, the moisture detector 18 detects and displays the moisture content of starch flowing out of the receiving hopper 6, when the moisture content is higher than a set requirement, the moisture detector 18 controls the rotating speed of a power motor of a feeder 1 to be reduced, the starch which needs to be dried and enters an airflow drying pipeline 4 is reduced, the starch in the airflow drying pipeline 4 is reduced, high-temperature air in the airflow drying pipeline 4 is unchanged, the starch which needs to be dried is reduced, and therefore the starch is dried more thoroughly, and the moisture content of the starch at the discharge port of the receiving hopper 6 is reduced. When the moisture content of the starch at the discharge port of the receiving hopper 6 detected by the moisture detector 18 is lower than a set requirement, the moisture detector 18 controls the rotating speed of the power motor of the feeder 1 to be increased, the starch to be dried entering the airflow drying pipeline 4 is increased, the starch in the airflow drying pipeline 4 is increased, the high-temperature air in the airflow drying pipeline 4 is unchanged, the starch to be dried is increased, and therefore the moisture content of the starch at the discharge port of the receiving hopper 6 is increased.
The material level meter 20 is arranged on the material receiving hopper 6, the material level meter 20 meters and displays the material level of starch in the material receiving hopper 6, the rotating speed of a power motor of the feeder 1 can be adjusted according to the material level, when the material level is high, the rotating speed of the power motor is reduced, the starch entering the airflow drying pipeline 4 is reduced, when the material level is low, the rotating speed of the power motor is improved, the starch entering the airflow drying pipeline 4 is increased, and the arrangement of the material level meter 20 can effectively control the starch amount in the airflow drying pipeline 4, keep the system stably running and avoid the problem of pipeline blockage caused by overhigh material level in the material receiving hopper 6.
A tail gas dust detector 19 is arranged on a pipeline between an air outlet of the pulse dust collector 11 and an air inlet of the induced draft fan 7, the powder content in tail gas is detected by the tail gas dust detector 19, when the powder content in the tail gas is too high, an alarm can be automatically sent out, the induced draft fan 7 and the feeder 1 can be closed, the system can be checked and treated after being shut down, the tail gas with too high dust is prevented from being discharged to the atmosphere, the atmospheric pollution is reduced, and the environment is protected.
It should be noted that the above-mentioned embodiments illustrate rather than limit the technical solutions of the present invention, and that equivalent substitutions or other modifications made by those skilled in the art according to the prior art are all included within the scope of the claims of the present invention as long as they do not exceed the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a novel air current drying system of energy-efficient environmental protection which characterized in that: comprises a feeder (1), a thrower (2), an air heating device (3), an airflow drying pipeline (4), a cyclone separator (5), a receiving hopper (6), a draught fan (7), an air conveying system (8) and a tail gas waste heat recovery device (9),
a feed inlet of the feeder (1) is communicated with a material source to be dried, a discharge outlet of the feeder (1) is communicated with a feed inlet of the thrower (2), a discharge outlet of the thrower (2) is communicated with a feed inlet of the pneumatic drying pipeline (4), the feeder (1) and the thrower (2) send the material to be dried into the pneumatic drying pipeline (4),
an air inlet of the air heating device (3) is communicated with the tail gas waste heat recovery device (9), an air outlet of the air heating device is communicated with the airflow drying pipeline (4), a medium inlet of the air heating device is communicated with the steam source (10), the air is heated by utilizing steam to provide high-temperature air for airflow drying,
an airflow drying pipeline (4), wherein high-temperature air and materials to be dried flow in the airflow drying pipeline (4) and are dried in the flowing process,
a cyclone separator (5) for separating the dried material from the air, a feed inlet of the cyclone separator is communicated with a discharge outlet of the airflow drying pipeline (4), a discharge outlet of the cyclone separator is communicated with a material receiving hopper (6), an air outlet of the cyclone separator is communicated with an air inlet of the pulse dust collector (11),
a material receiving hopper (6) for collecting the dried material, a material inlet thereof is communicated with a material outlet of the cyclone separator (5), a material outlet thereof is communicated with an air conveying system (8),
the pulse dust collector (11) is used for removing light and fine dust materials in the tail gas, an air inlet of the pulse dust collector is communicated with an air outlet of the cyclone separator (5), an air outlet of the pulse dust collector is communicated with an air inlet of the induced draft fan (7), a discharge hole of the pulse dust collector is communicated with the air conveying system (8), and the air conveying system (8) is used for conveying the dried materials;
the induced draft fan (7) is used for providing power for the flow of high-temperature air and materials;
and a medium inlet of the tail gas waste heat recovery device (9) is communicated with an air outlet of the induced draft fan (7), an air inlet of the tail gas waste heat recovery device is communicated with the atmosphere, a medium outlet of the tail gas waste heat recovery device is communicated with the atmosphere, an air outlet of the tail gas waste heat recovery device is communicated with an air inlet of the air heating device (3), the tail gas waste heat recovery device (9) is used for recovering waste heat in tail gas, and the air is preheated by utilizing the waste heat of the tail gas.
2. The energy-efficient environmental protection novel pneumatic drying system of claim 1, characterized in that: air heating device (3) including heating casing (31), steam radiator (32) and condensation radiator (33), heating casing (31) be both ends open-ended toper tubular structure, its one end opening is big, its other end opening is little, the one end that its opening is little is the gas outlet of air heating device (3), the one end that its opening is big is the air inlet of air heating device (3), heating casing (31) in arrange condensation radiator (33) and steam radiator (32) from the air inlet to the gas outlet in proper order, the air inlet of steam radiator (32) intercommunication steam source (10), the comdenstion water export of steam radiator (32) passes through the water inlet of pipeline intercommunication condensation radiator (33), the delivery port intercommunication condensation water pitcher of condensation radiator (33).
3. The energy-efficient environmental protection's novel pneumatic drying system of claim 2 characterized in that: heating casing (31) on be provided with temperature sensor (12), temperature sensor (12) are located the one end that is close to air heating device (3) gas outlet of heating casing (31), the pipeline of the air inlet intercommunication of steam source (10) and steam radiator (32) on be provided with air intake regulating valve (13), temperature sensor (12) be connected with air intake regulating valve (13) electricity, realize the chain control of temperature sensor (12) and air intake regulating valve (13), temperature sensor (12) detect and show the air current temperature of the gas outlet department of heating casing (31) to according to opening and close and opening the size of this air current temperature control air intake regulating valve (13).
4. The energy-efficient environmental protection's novel pneumatic drying system of claim 2 characterized in that: steam source (10) connect fire extinguishing air inlet (15) on heating casing (31) through fire extinguishing pipe way (14), fire extinguishing air inlet (15) be located the one end that is close to air heating device (3) gas outlet of heating casing (31), fire extinguishing pipe way (14) on be provided with fire extinguishing valve (16), fire extinguishing valve (16) be connected with temperature sensor (12) electricity, realize arc extinguishing valve (16) and temperature sensor (12) interlocking control.
5. The energy-efficient environmental protection's novel pneumatic drying system of claim 2 characterized in that: the air inlet of the air heating device (3) is provided with an air filter (17), the air filter (17) comprises a plurality of filter screens arranged in the air inlet of the air heating device (3), and the plurality of filter screens are sequentially arranged along the flowing direction of the air in the heating shell (31).
6. The energy-efficient environmental protection novel pneumatic drying system of claim 1, characterized in that: feeder (1) adopt the feed auger, the discharge gate of receiving hopper (6) on be provided with moisture detector (18), moisture detector (18) be connected with the motor power of feeder (1) electricity, moisture detector (18) detect the moisture content of the material of the discharge gate outflow of receiving hopper (6) to open and close and the rotational speed of motor power according to this moisture content control feed auger.
7. The energy-efficient environmental protection novel pneumatic drying system of claim 1, characterized in that: the tail gas waste heat recovery device (9) adopts a tubular heat exchanger, a shell side air inlet of the tubular heat exchanger is communicated with an air outlet of an induced draft fan (7), a shell side air outlet of the tubular heat exchanger is communicated with the atmosphere, a tube side air inlet of the tubular heat exchanger is communicated with the atmosphere, and a tube side air outlet of the tubular heat exchanger is communicated with an air inlet of an air heating device (3).
8. The energy-efficient environmental protection novel pneumatic drying system of claim 1, characterized in that: the pipeline of the air outlet of pulse dust collector (11) and the air intake intercommunication of draught fan (7) on be provided with tail gas dust detector (19), tail gas dust detector (19) are connected with the motor power electricity of draught fan (7) and feeder (1) respectively, utilize tail gas dust detector (19) to detect and show the powder content in the tail gas, when the tail gas contains the powder content and is higher than the setting value, control draught fan (7) and feeder (1) and shut down.
9. The energy-efficient environmental protection novel pneumatic drying system of claim 1, characterized in that: the material receiving hopper (6) is provided with a material level meter (20), and the material level meter (20) displays and warns the material level of the material receiving hopper (6).
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| CN114857876A (en) * | 2022-06-01 | 2022-08-05 | 唐山市丰南区金翔化纤有限公司 | Raw material pre-drying device |
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