CN218884613U - Take waste heat recovery's airtight circulation drying system - Google Patents
Take waste heat recovery's airtight circulation drying system Download PDFInfo
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- CN218884613U CN218884613U CN202223382525.5U CN202223382525U CN218884613U CN 218884613 U CN218884613 U CN 218884613U CN 202223382525 U CN202223382525 U CN 202223382525U CN 218884613 U CN218884613 U CN 218884613U
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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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Abstract
The utility model relates to a take waste heat recovery's airtight circulation drying system belongs to the dry technical field of industry. The drying system comprises a drying device, an air supply device and a tail gas treatment system, wherein the tail gas treatment system comprises a dry dust collector, a waste heat recovery device and a wet dust collector which are sequentially connected through pipelines, the waste heat recovery device is provided with two heat exchange pipelines which are respectively a cold air channel and a hot air channel, the air inlet end of the hot air channel is connected with the dry dust collector, the air outlet end of the wet dust collector is connected with the air inlet end of the cold air channel, the air outlet end of the cold air channel is connected with the air outlet end of the wet dust collector, and the air outlet end of the air supply device is connected with the pipeline. The utility model discloses an airtight circulation drying system increases waste heat recovery device in tail gas processing system, uses the heat of dry tail gas self to heat the tail gas of purifying back cyclic utilization, realizes waste heat recovery and utilizes.
Description
Technical Field
The utility model relates to an industrial drying technology field, concretely relates to take waste heat recovery's airtight circulation drying system.
Background
Drying is one of the important production links in the industrial fields of chemical industry, medicine and the like, and is mainly used for removing moisture contained in materials by fully mixing and exchanging heat between high-temperature airflow and moisture-containing materials so as to facilitate subsequent processing, storage and transportation. The drying system which is commonly used mainly comprises an air filter, a blower, a heater, a drying device, a dust removal and purification device, an induced draft fan and other equipment, namely, after the environmental air filtered by the air filter is pressurized and heated by the blower and the heater respectively, the environmental air is subjected to sufficient heat exchange with moisture-containing materials in the drying device to dry the materials; when the air current carries dry material to pass through dust removal purification device, the material is collected by dust removal purification device, and the air current then directly discharges under the draught fan effect.
At present, partial drying system recycles heat in the dry tail gas by arranging a waste heat exchanger, but because the dust removal and purification capacity of the system is limited, partial material dust is still carried in the dry tail gas entering the waste heat exchanger, and the dust is easy to accumulate on the heat exchange surface of the waste heat exchanger, so that the heat exchange efficiency is reduced, and the waste heat recycling effect is seriously influenced.
The existing drying system mainly has the following problems in industrial application:
(1) The open type drying system adopts pressurized and heated ambient air as drying gas, and is not suitable for reacting with air components or drying flammable and explosive materials;
(2) The dry tail gas still has higher temperature and is directly conveyed to a washing tower or discharged to the atmospheric environment or causes a large amount of energy waste, so that the energy consumption of the system is increased;
(3) To the part drying system that has adopted waste heat recovery device, the system is limited to dry tail gas dust removal purification ability, not only can lead to the waste of material, also makes the dust of carrying in the air current gather on the heat transfer surface simultaneously easily, influences heat exchange efficiency and waste heat recovery effect.
Disclosure of Invention
For solving the problem among the prior art, the utility model discloses a take waste heat recovery's airtight circulation drying system to solve the problem that current closed circulation drying system is not enough to tail gas waste heat utilization.
The utility model adopts the technical proposal that: the drying system includes drying device, air supply arrangement and tail gas processing system, air supply arrangement connects drying device's air inlet end, tail gas processing system connects drying device's air-out end and air supply arrangement's air inlet end, tail gas processing system includes dry dust collector, waste heat recovery device and the wet dust collector that connects gradually through the pipeline, waste heat recovery device is provided with two heat transfer passageways, is cold wind passageway and hot-blast passageway respectively, dry dust collector is connected to the air inlet end of hot-blast passageway, and the air inlet end of wet dust collector is connected to the air-out end of hot-blast passageway, the air-out end of wet dust collector is connected to the air inlet end of cold wind passageway, and air supply arrangement's air inlet end is connected to the air-out end pipeline of cold wind passageway.
Furthermore, the air supply device comprises a circulating fan and a steam heater which are connected through pipelines, and an air inlet end of the circulating fan is connected with an air outlet end of a cold air channel of the waste heat recovery device through a pipeline.
Furthermore, the dry dust collector of the tail gas treatment system comprises a cyclone dust collector and a bag-type dust collector which are sequentially connected through a pipeline.
Further, the wet dust collector is a spray washing tower.
Furthermore, a flushing port and a sewage draining port are formed in a shell of the waste heat recovery device, the flushing port and the sewage draining port are respectively formed in the upper end and the lower end of the hot air channel, and the flushing port is connected with a flushing water pipeline.
Furthermore, a discharge branch is arranged on a pipeline of the tail gas treatment system, the discharge branch is arranged at the downstream of the air outlet end of a cold air channel of the waste heat recovery device, and an air supply branch is arranged at the upstream of a circulating fan of the air supply device.
Compared with the prior art, the utility model discloses a take waste heat recovery's airtight circulation drying system's of taking progress part lies in:
(1) The application range is wide, a drying mode of closed circulation is adopted, air can be directly adopted as circulating gas for materials which do not react with air components and are non-flammable and non-explosive, and carbon dioxide or nitrogen and the like can be adopted as circulating gas for materials which react with air components or have flammable and explosive properties, so that the safety, stability and high efficiency of the operation of a drying system are ensured.
(2) By arranging the waste heat recovery device, the heat of the dry tail gas is used for preheating the circulating air flow, so that the heat in the dry tail gas can be effectively recovered, and the energy consumption of a heater is reduced, thereby realizing waste heat recovery and utilization, reducing the energy consumption of a system and reducing the production cost;
(3) The multi-stage purification device is adopted, and the cyclone dust collector and the bag-type dust collector are adopted for two-stage purification before the dry tail gas enters the waste heat recovery device, so that the dust content in the dry tail gas is effectively reduced, the waste of materials can be reduced, the dust accumulation in the waste heat recovery device can be reduced, and the heat exchange effect of the waste heat recovery device is ensured; in addition, a washing tower is arranged behind the waste heat recovery device to purify the circulating air flow, so that the cleanness of the circulating air flow is ensured;
(4) By adopting the waste heat recovery device with the self-cleaning function, the waste heat recovery device is automatically cleaned regularly through the spraying device, so that the situation that residual dust in circulating airflow is accumulated on a heat exchange surface of the waste heat recovery device to reduce the heat exchange efficiency is avoided, manual operation is reduced, and the heat exchange effect is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a closed cycle drying system with waste heat recovery.
Fig. 2 is a schematic sectional view of the waste heat recovery device.
In the figure, 1-circulating fan; 2-a heater; 3-a drying device; 4-cyclone dust collector; 5-bag dust collector; 6, a waste heat recovery device; 7-a washing tower; 8-a discharge branch; 9-branch of qi invigorating; 61 a housing; 62 heat exchange tubes; 63 a pipe box; 64 hot air channel air inlet end; 65 hot air channel air outlet end; 66 air inlet end of cold air channel; 67 cool wind passageway air-out end.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention are clearly and completely described, and the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative efforts shall fall within the protection scope of the present invention.
As shown in fig. 1, the utility model discloses a take waste heat recovery's an embodiment of airtight circulation drying system, drying system includes drying device 3 in this embodiment, air supply arrangement and tail gas processing system, the fluidized bed drying machine of mainstream among the 3 optional prior art of drying device, rotary drier etc, air supply arrangement connects drying device 3's air inlet end, carry dry hot-blast, tail gas processing system connects drying device 3's air-out end and air supply arrangement's air inlet end, send the air-back device after handling dry tail gas purification again, cyclic utilization carries out.
The tail gas treatment system comprises a cyclone dust collector 4, a bag-type dust collector 5, a waste heat recovery device 6 and a spraying washing tower 7 which are sequentially connected through pipelines. Two heat exchange passages are arranged in the waste heat recovery device 6, namely a cold air passage and a hot air passage, and the two pipelines carry out non-contact heat exchange.
As shown in fig. 2, the waste heat recovery device 6 is provided with a cold air channel and a hot air channel, wherein a space between the housing 61 of the waste heat recovery device 6 and the heat exchange pipe 62 is the hot air channel, and the interior of the heat exchange pipe 62 and the end headers 63 are the cold air channels. The hot air channel air inlet end 64 is connected with the air outlet end of the bag-type dust collector 5, and the hot air channel air outlet end 65 is connected with the air inlet end of the washing tower 7. The cold air channel air inlet end 66 is connected with the air outlet end of the washing tower 7, and the cold air channel air outlet end 67 is connected with the air inlet end of the air supply device through a pipeline. The dry tail gas discharged by the bag-type dust collector 5 is subjected to non-contact heat exchange by the air flows in the two channels in the space outside the shell 61 and the heat exchange tube 62 of the waste heat recovery device 6. In addition, casing 61 is equipped with respectively at hot air channel's top and bottom and washes mouthful 68 and drain 69, washes mouthful 68 and is provided with the ooff valve on the drain 69, washes mouthful 68 butt joint wash water pipeline, and the accessible lets in washing water regularly to the heat exchanger and washes heat exchange pipe and casing wall to get rid of the dust of gathering on waste heat recovery device heat transfer surface that carries in the circulating air current.
The air supply device comprises a circulating fan 1 and a steam heater 2 which are connected through a pipeline, an air inlet end of the circulating fan 1 is connected with an air outlet end pipeline of a cold air channel of the waste heat recovery device 6, and the purified and preheated tail gas is circularly sent back to the drying device.
A discharge branch 8 is arranged on a pipeline of the tail gas treatment system, the discharge branch 8 is arranged at the downstream of the air outlet end of a cold air channel of the waste heat recovery device, and part of tail gas is periodically exhausted. An air supplement branch 9 is arranged at the upstream of the circulating fan 1 of the air supply device, and new process air is supplemented periodically according to application requirements. The discharge branch 8 and the air supply branch 9 are respectively provided with a switch valve.
When the closed circulating drying system with waste heat recovery disclosed by the patent of the utility model is applied, the air flow is pressurized by the circulating fan 1 in sequence, the heater 2 is heated and then enters the drying device 3, and in the drying device 3, the high-temperature air flow and the wet material entering through the feed inlet of the drying device 3 are in full contact heat exchange to remove the moisture of the wet material; the dried air flow is discharged from the drying device 3 and enters the cyclone dust collector 4, most of powder carried by the air flow in the cyclone dust collector 4 is separated from the air flow and is discharged from a discharge hole at the bottom of the cyclone dust collector 4, a small part of materials are discharged from an air outlet at the top of the cyclone dust collector 4 along with the air flow and then enter the bag-type dust collector 5, and the bag-type dust collector 5 further removes dust and purifies the air flow; the materials separated by the bag-type dust collector 5 are discharged through a discharge hole and then enter the material collecting device together with the materials discharged by the cyclone dust collector 4, the airflow with higher temperature is discharged through an air outlet of the bag-type dust collector 5 and enters the washing tower 7 through a hot air channel of the waste heat recovery device 6, and is discharged through an air outlet at the top of the washing tower 7 after being finally purified by the washing tower 7 and enters a cold air channel of the waste heat recovery device 6 for preheating; an air outlet of a cold air channel of the waste heat recovery device 6 is connected with an air inlet of the circulating fan 1, and the preheated air enters the next cycle after being pressurized by the circulating fan 1.
The above description is only for the preferred embodiment of the present invention, and it should not be construed as limiting the scope of the invention, and all the equivalent changes and modifications made by the claims and the description of the invention are also included in the scope of the present invention.
Claims (6)
1. The utility model provides a take waste heat recovery's airtight circulation drying system, drying system includes drying device, air supply arrangement and tail gas processing system, air supply arrangement connects drying device's air inlet end, tail gas processing system connects drying device's air-out end and air supply arrangement's air inlet end, a serial communication port, tail gas processing system includes dry dust collector, waste heat recovery device and the wet dust collector who connects gradually through the pipeline, waste heat recovery device is provided with two heat transfer passageways, is cold wind passageway and hot-blast passageway respectively, the air-out end of dry dust collector is connected to the air inlet end of hot-blast passageway, and the air inlet end of wet dust collector is connected to the air-out end of hot-blast passageway, the air-out end of wet dust collector is connected to the air inlet end of cold wind passageway, and the air-out end pipe connection air supply arrangement's air inlet end of cold wind passageway.
2. The closed circulating drying system with the waste heat recovery function according to claim 1, wherein the air supply device comprises a circulating fan and a steam heater which are connected through a pipeline, and an air inlet end of the circulating fan is connected with an air outlet end of a cold air channel of the waste heat recovery device through a pipeline.
3. The closed circulation drying system with the waste heat recovery function according to claim 2, wherein the dry dust collector of the tail gas treatment system comprises a cyclone dust collector and a bag-type dust collector which are sequentially connected through a pipeline.
4. The closed cycle drying system with waste heat recovery of claim 3, wherein the wet dust collector is a spray scrubber.
5. The closed circulating drying system with the waste heat recovery function as claimed in claim 4, wherein a shell of the waste heat recovery device is provided with a flushing port and a sewage draining port, the flushing port and the sewage draining port are arranged at the upper end and the lower end of the hot air channel, and the flushing port is connected with a flushing water pipeline.
6. The closed circulating drying system with the waste heat recovery function according to claim 4, wherein a discharge branch is arranged on a pipeline of the tail gas treatment system, the discharge branch is arranged at the downstream of an air outlet end of a cold air channel of the waste heat recovery device, and an air supply branch is arranged at the upstream of a circulating fan of an air supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223382525.5U CN218884613U (en) | 2022-12-16 | 2022-12-16 | Take waste heat recovery's airtight circulation drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223382525.5U CN218884613U (en) | 2022-12-16 | 2022-12-16 | Take waste heat recovery's airtight circulation drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218884613U true CN218884613U (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223382525.5U Active CN218884613U (en) | 2022-12-16 | 2022-12-16 | Take waste heat recovery's airtight circulation drying system |
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| CN (1) | CN218884613U (en) |
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- 2022-12-16 CN CN202223382525.5U patent/CN218884613U/en active Active
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