CN111023791B - Drying waste heat recycling integrated device - Google Patents
Drying waste heat recycling integrated device Download PDFInfo
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- CN111023791B CN111023791B CN201911337071.XA CN201911337071A CN111023791B CN 111023791 B CN111023791 B CN 111023791B CN 201911337071 A CN201911337071 A CN 201911337071A CN 111023791 B CN111023791 B CN 111023791B
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- heat exchanger
- gas
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- dryer
- compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The utility model provides a stoving used heat recycles integrated device, includes desicator (1), medium treater (2), compressor (3), spray thrower (4) and heat exchanger (6), desicator (1) upper portion is equipped with exhaust outlet (13), medium treater (2) is connected to exhaust outlet (13) one end, medium treater (2) back connection compressor (3), compressor (3) link to each other with heat exchanger (6) through the pipeline, the exit end of compressor (3) is connected with spray thrower (4), be connected with start-up heat source (5) on the pipeline between spray thrower (4) and heat exchanger (6), heat exchanger (6) link to each other with desicator (1), this system returns the desicator after compressing exhaust outlet (13) exhaust hot moisture, has realized the cyclic utilization of energy, and degree of automation is high, is green and environment-friendly.
Description
Technical Field
The invention relates to a novel energy-saving and environment-friendly technology in the technical field of drying, in particular to an integrated device for recycling drying waste heat.
Background
In the existing drying process, moisture in the materials is vaporized and escaped through drying the materials so as to obtain solid materials with specified moisture content. In the process, a large amount of waste gas (hot moisture) is generated, the waste gas contains a large amount of latent heat, and if the waste gas is directly discharged into the air, the atmospheric environment is polluted, and a large amount of energy is wasted. Some of the prior art also recovers some of the heat by spraying or heat exchange. For example, in a heat recovery device of exhaust gas discharged from a boiling drying device, which is called CN 202709697U, a heat recovery device is provided, in which a heat exchange surface is arranged, after the exhaust gas in the dryer enters the heat recovery device, the heat exchange surface absorbs the heat released by the exhaust gas, and then the exhaust gas is discharged into the atmosphere. The method can only recover part of heat, the recovered heat is less, and part of heat is still wasted. Moreover, after the heat exchange surface is used for a long time, the heat exchange performance is rapidly reduced, a large amount of waste gas cannot be recovered and is directly discharged into the air, and the problem of environmental pollution is caused.
In addition, a method for recycling saturated steam discharged from a conduction dryer is specially adopted in the prior art, but the method is large in limitation, can only be applied to a vacuum dryer, and is not wide in application range.
Disclosure of Invention
The invention mainly aims at the problems that the hot moisture generated in the drying process can only recover partial heat, the recovered heat is less, the recovered heat equipment is incomplete, the heat is wasted and the environment is polluted, and provides a novel drying waste heat recycling integrated device.
The technical scheme of the invention is as follows:
a drying waste heat recycling integrated device comprises a dryer, a medium processor, a compressor, a sprayer and a heat exchanger, wherein a waste gas outlet is formed in the upper portion of the dryer, one end of the waste gas outlet is connected with the medium processor, a filter is arranged in the medium processor and can filter impurities in waste gas, the compressor is connected to the back of the medium processor and is connected with the heat exchanger through a pipeline, the outlet end of the compressor is connected with the sprayer, a starting heat source is connected to a pipeline between the sprayer and the heat exchanger, the heat exchanger is connected with the dryer in an external connection mode or an embedded mode, high-temperature hot wet gas generated after the sprayer is condensed by the heat exchanger to release heat to dry materials in the dryer, waste gas generated in the drying process is discharged from the waste gas outlet, and one end of a liquid outlet of the heat exchanger is connected with a steam condensate pipeline, and the condensed water enters a secondary recovery unit for retreatment.
Further, the dryer includes, but is not limited to, the following categories: box dryer, vertical dryer, tunnel dryer, paddle dryer, mesh belt dryer, fluidized bed, double-cone rotary vacuum dryer, conduction dryer, rake dryer, disc dryer, drum dryer, pneumatic dryer, flash dryer, spray dryer, vibrated fluidized bed, microwave dryer, infrared dryer.
Further, the media processors include, but are not limited to, the following categories: cyclone dust collector, filter cartridge dust collector, bag-type dust collector, electrostatic dust collector, water film dust collector.
Further, the compressor includes, but is not limited to, the following categories: screw compressor, roots compressor, centrifugal compressor, scroll compressor, piston compressor.
Further, the compressor comprises a plurality of adjustable temperature sections, and at least comprises a temperature section below 80 ℃, and can be suitable for drying most materials. Preferably, the adjustable temperature section comprises the temperature below 80 ℃, between 80 and 100 ℃, between 100 and 120 ℃, between 120 and 140 ℃ and above 140 ℃, and can generate steam with different temperatures, thereby having wide application range.
Further, the sprayer includes a spray pump and water, and the water may use tap water, purified water, condensed water, recycled water, or the like.
Further, the starting heat source comprises one or more of a coal-fired boiler, a gas-fired boiler, an oil-fired boiler, a resistance boiler, valley electricity heat storage, an electromagnetic boiler, a heat pump or solar energy.
Further, the heat exchanger comprises a shell and tube heat exchanger or a finned tube heat exchanger and the like.
According to the drying waste heat recycling integrated device, one end of the liquid outlet of the heat exchanger is connected with the steam condensate water pipeline, the other end of the steam condensate water pipeline is connected with the gas-liquid separator, and hot condensate water generated in the heat exchanger can be recycled.
Furthermore, the heat exchanger is connected with a fan at one end far away from the dryer for quickening the outflow of high-temperature dry air in the heat exchanger, and one end of a gas outlet of the gas-liquid separator is connected with the fan to recycle hot air.
Furthermore, one end of a liquid outlet of the gas-liquid separator is connected with another heat exchanger, an inlet end of the heat exchanger is connected with an air source, and an outlet end of the heat exchanger is connected with a fan. The hot condensed water is changed into low-temperature condensed water after exchanging heat with air through the heat exchanger and flows out, and the low-temperature condensed water can be used in other production processes.
According to the drying waste heat recycling integrated device, one end of the heat exchanger is connected with the steam condensate water pipeline, and the rear end of the steam condensate water pipeline is connected with the flash tank.
Preferably, a pressure booster is connected between the steam condensate water pipeline and the flash tank, and hot steam in the steam condensate water pipeline is introduced into the flash tank after being pressurized.
Further, one end of a recovered steam outlet of the flash tank is connected to the medium processor.
Further, the flash tank is connected with a gas-liquid separator through a vacuum pumping pipeline, and the rear end of the gas-liquid separator is connected with a vacuum pump.
Further, desicator one end is connected with noncondensable gas pipeline, noncondensable gas pipeline links to each other with vapour and liquid separator, vapour and liquid separator's liquid outlet one end links to each other with steam condensate water pipeline.
The invention has the beneficial effects that:
1. according to the drying waste heat recycling integrated device disclosed by the invention, hot steam passes through the medium processor, the compressor and the heat exchanger and then returns to the dryer, low-grade heat energy is converted into high-grade heat energy, the cyclic utilization of energy is realized, the automation degree is high, the occupied area is small, and the high efficiency and the energy conservation are realized.
2. The drying waste heat recycling integrated device disclosed by the invention can be applied to various dryers, can dry all hot moisture (the content of water vapor is 0-100%) including saturated steam, and is wide in application range.
3. The drying waste heat recycling integrated device disclosed by the invention has the advantages that the adjustable temperature sections of the compressor comprise the temperature below 80 ℃, 80-100 ℃, 100-plus-120 ℃, 120-plus-140 ℃ and above 140 ℃, can generate steam with different temperatures, has wide application range, and can be widely applied to the heating and drying industries.
4. According to the drying waste heat recycling integrated device disclosed by the invention, the hot condensed water generated by the heat exchanger can be continuously recycled, all waste gas and waste heat can be recycled to the maximum extent, the disordered discharge of the dried hot and wet waste steam to the surrounding environment is reduced, the pollution discharge problem can be thoroughly solved particularly for materials with pollution factors, such as the materials can be subjected to closed utilization, and the environment can be better protected.
5. The drying waste heat recycling integrated device disclosed by the invention does not consume fuel gas and fuel oil in the whole recycling process, has no danger of combustion and explosion, is isolated from a water flow part by a charged part, has no danger of electric leakage, and is safe and reliable.
Drawings
The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
In the drawings:
fig. 1 is a schematic structural diagram of the drying waste heat recycling integrated apparatus in this embodiment 1;
fig. 2 is a schematic structural diagram of the drying waste heat recycling integrated apparatus in this embodiment 2;
the components represented by the reference numerals in the figures are:
1. the system comprises a dryer, 11, a material inlet, 12, a material outlet, 13, a waste gas outlet, 14, a non-condensable gas pipeline, 2, a medium processor, 3, a compressor, 4, a sprayer, 5, a starting heat source, 6, a heat exchanger, 61, a steam condensed water pipeline, 7, a gas-liquid separator, 71, a cold medium inlet, 72, a cold medium outlet, 73, a non-condensable gas outlet, 8, a flash tank, 81, a coil pipe heat exchanger, 82, a water outlet, 83, a recovered steam outlet, 84, a vacuumizing pipeline, 9, a supercharger, 10 and a fan.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided so that this disclosure can be more completely understood and fully conveyed to those skilled in the art, and the present disclosure may be implemented in various forms without being limited to the embodiments set forth herein.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of the drying waste heat recycling integrated device of the embodiment, and includes a dryer 1, a medium processor 2, a compressor 33, a sprayer 4 and a heat exchanger 6, where the upper portion of the dryer 1 is provided with a material inlet 11 and a waste gas outlet 13, and the lower portion is provided with a material outlet 12, and after the material in the dryer 1 is dried by high-temperature hot steam, the material is discharged from the waste gas outlet 13. The dryer 1 comprises a common box dryer, a vertical dryer and the like, all materials with the water content of 0-100% can be dried, and the water content of the dried materials can be adjusted between 0-100%.
Further, one end of the exhaust gas outlet 13 is connected to the media processor 2, a filter is disposed in the media processor 2, and the filter can filter impurities in the exhaust gas, and the media processor 2 includes, but is not limited to, the following types: cyclone dust collector, filter cartridge dust collector, bag-type dust collector, electrostatic precipitator.
Further, a compressor 3 is connected to the rear of the medium processor 2, the compressor 3 is connected with a heat exchanger 6 through a pipeline, and the compressor 3 can compress the filtered medium-low temperature hot humid gas into high-temperature high-pressure gas which is conveyed to the heat exchanger 6 for heat exchange.
Further, the compressor 3 includes, but is not limited to, the following categories: screw compressor, roots compressor, centrifugal compressor, scroll compressor, piston compressor.
In this embodiment, the compressor 3 includes 5 adjustable temperature sections, which are respectively below 80 ℃, 80-100 ℃, 100-.
Further, the outlet end of the compressor 3 is connected with a sprayer 4, the sprayer 4 comprises a spray pump and water, and the water can be tap water, purified water, condensed water, recycled water and the like. Since the hot and humid air generated after being compressed by the compressor 3 is superheated gas, the superheated gas can be converted into saturated gas for later use by spraying water through the sprayer 4.
Further, a starting heat source 5 is connected to a pipeline between the sprayer 4 and the heat exchanger 6, and the starting heat source 5 comprises one or more of a coal-fired boiler, a gas-fired boiler, an oil-fired boiler, a resistance boiler, valley electricity heat storage, an electromagnetic boiler, a heat pump or solar energy.
In this embodiment, the heat exchanger 6 is externally connected to the dryer 1, and the saturated steam enters the dryer 1 after heat exchange by the heat exchanger 6 to dry the material therein, and then is discharged from the exhaust gas outlet 13. The heat exchanger 6 can adopt a shell and tube heat exchanger or a finned tube heat exchanger and the like.
Furthermore, one end of the heat exchanger 6, which is far away from the dryer 1, is connected with a fan 10, and the fan 10 can accelerate the outflow of high-temperature dry air in the heat exchanger 6.
Furthermore, a steam condensate pipe 61 is connected to one end of a liquid outlet of the heat exchanger 6, and the other end of the steam condensate pipe 61 is connected to the gas-liquid separator 7, so that hot condensate generated in the heat exchanger 6 can be recycled.
Further, one end of a gas outlet of the gas-liquid separator 7 is connected with the fan 10, so that hot air is recycled. And one end of a liquid outlet of the gas-liquid separator 7 is connected with another heat exchanger 6, the inlet end of the heat exchanger 6 is connected with an air source, and the outlet end of the heat exchanger 6 is connected with a fan 10. The hot condensed water is changed into low-temperature condensed water after exchanging heat with air through the heat exchanger 6 and flows out, and the prepared low-temperature condensed water can be used in other production processes.
Example 2
The heat exchanger 6 in the embodiment 1 is externally connected to the dryer 1, the heat exchanger 6 in the embodiment is embedded in the dryer 1, and the recycling of the hot steam is realized by connecting a secondary steam recovery unit behind the heat exchanger 6.
Referring now to fig. 2, the secondary steam recovery unit in this embodiment includes a flash tank 8, and the heat exchanger 6 is connected to the flash tank 8 by a steam condensate conduit 61. Preferably, a pressure booster 9 is further connected between the steam condensate water pipeline 61 and the flash tank 8, and the pressure booster 9 pressurizes the hot steam in the steam condensate water pipeline 61 and introduces the pressurized hot steam into the flash tank 8.
Further, a coil heat exchanger 81 is arranged in the flash tank 8, heat carrying media such as steam, hot water or heat conducting oil are introduced into the coil heat exchanger 81, high-pressure saturated water introduced by the supercharger 9 enters the flash tank 8 and then is changed into low-pressure steam and saturated water due to sudden pressure reduction, the low-pressure steam is conveyed into the medium processor 2 from one end of a recovered steam outlet 83 above the flash tank 8 for circulation application, and the saturated water flows out from a water outlet 82 below the flash tank 8 and can be used in other processes.
Further, the flash tank 8 is connected with the gas-liquid separator 7 through a vacuum pumping pipe 84, and a vacuum pump is connected to the rear end of the gas-liquid separator 7 to maintain the vacuum degree in the flash tank 8.
Further, one end of the dryer 1 is connected with a noncondensable gas pipeline 14, the noncondensable gas pipeline 14 is connected with the gas-liquid separator 7, the gas-liquid separator 7 is provided with a cold medium inlet 71 and a cold medium outlet 72, noncondensable gas and saturated water can be separated, the separated noncondensable gas is discharged from a noncondensable gas outlet 73, and the separated saturated water flows into the steam condensed water pipeline 61 from one end of the liquid outlet.
Other features not mentioned in this embodiment can be the same as those in embodiment 1, and are not described again.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or additions or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. The drying waste heat recycling integrated device is characterized by comprising a dryer (1), a medium processor (2), a compressor (3), a sprayer (4) and a heat exchanger (6), wherein a waste gas outlet (13) is formed in the upper portion of the dryer (1), one end of the waste gas outlet (13) is connected with the medium processor (2), a filter is arranged in the medium processor (2) and can filter impurities in waste gas, the compressor (3) is connected to the rear of the medium processor (2), the compressor (3) is connected with the heat exchanger (6) through a pipeline, the compressor (3) comprises a plurality of temperature-adjustable sections and at least comprises temperature sections below 80 ℃, the outlet end of the compressor (3) is connected with the sprayer (4), and a starting heat source (5) is connected to a pipeline between the sprayer (4) and the heat exchanger (6), the heat exchanger (6) is connected with the dryer (1), high-temperature hot wet gas generated behind the sprayer (4) is condensed by the heat exchanger (6) to release heat to dry materials in the dryer (1), waste gas generated in the drying process is discharged from a waste gas outlet (13), one end of a liquid outlet of the heat exchanger (6) is connected with a steam condensate water pipeline (61), the other end of the steam condensate water pipeline (61) is connected with the gas-liquid separator (7), and condensate water enters the secondary recovery unit to be treated again; one end of the heat exchanger (6) far away from the dryer (1) is connected with a fan (10), and one end of a gas outlet of the gas-liquid separator (7) is connected with the fan (10);
dryer (1) one end is connected with noncondensable gas pipeline (14), noncondensable gas pipeline (14) link to each other with vapour and liquid separator (7), the liquid outlet one end of vapour and liquid separator (7) links to each other with steam condensate water pipeline (61).
2. The drying waste heat recycling integrated device as claimed in claim 1, wherein one end of the liquid outlet of the gas-liquid separator (7) is connected with another heat exchanger (6), the inlet end of the heat exchanger (6) is connected with an air source, and the outlet end of the heat exchanger is connected with a fan (10).
3. The drying waste heat recycling integrated device as claimed in claim 1, wherein a steam condensate pipe (61) is connected to one end of the heat exchanger (6), and a flash tank (8) is connected to the rear end of the steam condensate pipe (61).
4. The drying waste heat recycling integrated device as claimed in claim 3, wherein a supercharger (9) is connected between the steam condensate water pipeline (61) and the flash tank (8).
5. The drying waste heat recycling integrated device as claimed in claim 3, wherein one end of the recovery steam outlet (83) of the flash tank (8) is connected to the medium processor (2).
6. The drying waste heat recycling integrated device as claimed in claim 3, wherein the flash tank (8) is connected with a gas-liquid separator (7) through a vacuum pumping pipeline (84), and a vacuum pump is connected to the rear end of the gas-liquid separator (7).
7. The drying waste heat recycling integrated device as claimed in claim 6, wherein one end of the liquid outlet of the gas-liquid separator (7) is connected with a steam condensate water pipe (61).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911337071.XA CN111023791B (en) | 2019-12-23 | 2019-12-23 | Drying waste heat recycling integrated device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911337071.XA CN111023791B (en) | 2019-12-23 | 2019-12-23 | Drying waste heat recycling integrated device |
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| CN111023791A CN111023791A (en) | 2020-04-17 |
| CN111023791B true CN111023791B (en) | 2021-11-16 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111829324B (en) * | 2020-07-13 | 2021-10-01 | 天津乐科节能科技有限公司 | Heat pump drying system and method |
| CN113776318A (en) * | 2021-09-15 | 2021-12-10 | 青岛创客智造机械设备有限公司 | Green energy-saving gas direct-fired drying system |
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| CN103090642A (en) * | 2013-01-17 | 2013-05-08 | 聂红军 | Granular material regeneration type fixed bed drying technology and device |
| CN204268833U (en) * | 2014-10-29 | 2015-04-15 | 湖北诺鑫生物科技有限公司 | First sulfanilamide (SN) produces waste-heat recovery device |
| CN206207964U (en) * | 2016-09-06 | 2017-05-31 | 东莞市元山节能设备有限公司 | A kind of Split high-efficiency energy recovery heat pump dryer |
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2019
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| US3635455A (en) * | 1970-07-07 | 1972-01-18 | Total Energy Corp | Method of operating a drier |
| CN102889776A (en) * | 2012-11-07 | 2013-01-23 | 石家庄工大化工设备有限公司 | Cyclic utilization production device of waste gas and steam of dryer |
| CN102967134A (en) * | 2012-11-30 | 2013-03-13 | 山东科院天力节能工程有限公司 | Drying system and process for recovering heat from waste heat steam |
| CN103090642A (en) * | 2013-01-17 | 2013-05-08 | 聂红军 | Granular material regeneration type fixed bed drying technology and device |
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