CN221267636U - Non-condensable gas degree of depth recovery processing device - Google Patents
Non-condensable gas degree of depth recovery processing device Download PDFInfo
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- CN221267636U CN221267636U CN202323138298.6U CN202323138298U CN221267636U CN 221267636 U CN221267636 U CN 221267636U CN 202323138298 U CN202323138298 U CN 202323138298U CN 221267636 U CN221267636 U CN 221267636U
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- 238000011084 recovery Methods 0.000 title claims abstract description 62
- 238000012545 processing Methods 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 145
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 239000002912 waste gas Substances 0.000 claims abstract description 43
- 239000002699 waste material Substances 0.000 claims abstract description 32
- 239000007921 spray Substances 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims abstract description 31
- 238000010521 absorption reaction Methods 0.000 claims abstract description 30
- 238000000746 purification Methods 0.000 claims abstract description 27
- 238000007710 freezing Methods 0.000 claims description 23
- 230000008014 freezing Effects 0.000 claims description 23
- 239000002918 waste heat Substances 0.000 claims description 23
- 238000009833 condensation Methods 0.000 claims description 18
- 230000005494 condensation Effects 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000002609 medium Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000012595 freezing medium Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The utility model relates to a non-condensable gas deep recovery processing device which comprises a spray absorption tower and a non-condensable gas temporary storage tank for collecting temporary storage non-condensable gas, wherein an exhaust gas inlet of the spray absorption tower is connected with a feed pipe, an exhaust gas outlet of the non-condensable gas temporary storage tank is communicated with the feed pipe through a connecting pipe, and a one-way valve for enabling the gas of the non-condensable gas temporary storage tank to enter the feed pipe is arranged on the connecting pipe. According to the utility model, the non-condensable gas temporary storage tank collects the non-condensable gas generated by the NMP waste liquid rectification purification unit, the non-condensable gas is finally treated with the NMP waste gas of the NMP waste gas recovery unit in a unified way, the equipment investment is saved, the recoverable component in the non-condensable gas generated by the NMP waste liquid rectification purification unit can be subjected to advanced treatment and recovery through the spray absorption tower, and the technical problem that the device is repeatedly constructed because a tail gas treatment device is required to be arranged for treating the exhaust gas in the independent operation process of the existing NMP waste gas recovery unit and the existing NMP waste liquid rectification purification unit is solved.
Description
Technical Field
The utility model relates to the technical field of non-condensable gas treatment, in particular to a non-condensable gas deep recovery treatment device.
Background
The low-pressure distillation technology is a main technology for realizing the separation and purification of liquid phase materials at present, the temperature of liquid phase separation can be reduced through low pressure, but certain non-condensable gas can be generated due to the action of a vacuum pump, and the non-condensable gas can be discharged after reaching standards by proper disposal. At present, the tail gas treatment of materials with stronger water solubility such as NMP is mainly carried out by adopting a spraying technology. The spraying is mainly to spray the liquid after atomizing, so that the liquid is effectively dispersed, the contact area of the liquid and the gas is increased, and the heat transfer or reaction efficiency is improved. In the aspect of treating industrial waste gas, the collected waste gas is sucked into a spray absorption tower through a fan unit, and is fully contacted with atomized washing liquid through mixing with atomized washing liquid so as to adsorb impurities or recovery components contained in the waste gas, and then the washed gas enters a next-stage system or is discharged, so that the aim of purifying industrial tail gas is fulfilled. The waste gas treatment equipment of the spray absorption tower has the advantages of convenient operation, convenient installation and maintenance, high strength, long service life and small occupied area, and is the current ideal waste gas treatment equipment.
Although the tail gas treatment technologies such as spraying and the like can effectively remove impurity components in the noncondensable gas, due to the requirement of environmental protection, each tail gas discharge point is provided with a tail gas treatment device. Or uniformly planning all the noncondensable gases to a noncondensable gas system for uniform treatment. The equipment investment of the tail gas treatment mode commonly used at present is high, and the pertinence is poor. The adaptability to the actual requirements under special working conditions is poor. If the tail gas emission of multiple emission points is unified to the non-condensable gas system, all pipelines are required to be provided with a device for preventing countercurrent and a power driving device, and a targeted treatment scheme is not required to be adopted after the waste gas is concentrated.
The exhaust emission points in the NMP waste gas recovery and rectification purification processes are two, namely the exhaust emission point of the waste gas recovery unit and the non-condensable gas emission point of rectification purification. The main pollutant discharged by the tail gas of the recovery unit is NMP medium, the pollution medium contained by the tail gas discharged by the rectification and purification unit is NMP, and the concentration of NMP in the noncondensable gas in the rectification and purification part is higher but the total discharge amount is less. If two sets of tail gas treatment devices are adopted for treatment respectively, two sets of tail gas treatment devices are required to be built, the treatment capacity of the rectification and purification unit is smaller, and the cost performance of equipment is lower.
Disclosure of utility model
Based on this, it is necessary to provide a deep recovery processing device for noncondensable gas to solve the technical problem that the existing NMP waste gas recovery unit and rectification purification unit need to be provided with a tail gas processing device to process the exhaust gas in the independent operation process, thereby causing repeated construction of the device.
The utility model provides a non-condensable gas deep recovery processing device which comprises a spray absorption tower and a non-condensable gas temporary storage tank for collecting temporary storage non-condensable gas, wherein an exhaust gas inlet of the spray absorption tower is connected with a feed pipe, an exhaust gas outlet of the non-condensable gas temporary storage tank is communicated with the feed pipe through a connecting pipe, and a one-way valve for enabling gas of the non-condensable gas temporary storage tank to enter the feed pipe is arranged on the connecting pipe.
According to the utility model, the non-condensable gas temporary storage tank collects the non-condensable gas generated by the NMP waste liquid rectification purification unit, the non-condensable gas is finally treated with the NMP waste gas of the NMP waste gas recovery unit in a unified way, the equipment investment is saved, the recoverable component in the non-condensable gas generated by the NMP waste liquid rectification purification unit can be subjected to advanced treatment and recovery through the spray absorption tower, and the technical problem that the device is repeatedly constructed because a tail gas treatment device is required to be arranged for treating the exhaust gas in the independent operation process of the existing NMP waste gas recovery unit and the existing NMP waste liquid rectification purification unit is solved.
As a further improvement of the above-described aspect of the present utility model, the check valve is a differential pressure check valve, and is opened to allow the gas of the non-condensable gas temporary storage tank to enter the feed pipe through the connecting pipe when the pressure P1 in the feed pipe is smaller than the pressure P2 in the non-condensable gas temporary storage tank.
As a further improvement of the scheme, the non-condensable gas deep recovery treatment device further comprises a condensation freezing unit, an air outlet of the condensation freezing unit is communicated with one end of the feeding pipe, which is far away from the spray absorption tower, an air inlet of the condensation freezing unit is used for receiving NMP waste gas from the coating machine, and NMP waste gas subjected to condensation freezing treatment by the condensation freezing unit enters the spray absorption tower from the feeding pipe.
As a further improvement of the scheme, the condensing and freezing unit comprises a condenser and a freezer, wherein the condenser is provided with a condensing component, the condensing component adopts cooling water as a condensing medium, the freezer is provided with a freezing component, the freezing component adopts chilled water as a freezing medium, an air outlet of the condenser is communicated with an air inlet of the freezer, and an air outlet of the freezer is communicated with a feeding pipe.
As a further improvement of the scheme of the utility model, the non-condensable gas deep recovery processing device also comprises a waste heat recovery heat exchanger and a return pipe; the waste heat recovery heat exchanger is provided with a heat exchange assembly, a hot gas inlet, a hot gas outlet, a cold gas inlet and a cold gas outlet, wherein the hot gas inlet is communicated with the cold gas outlet, the cold gas inlet is communicated with the hot gas outlet, the hot gas inlet of the waste heat recovery heat exchanger is communicated with the coating machine and is used for receiving NMP waste gas from the coating machine, and the cold gas outlet of the waste heat recovery heat exchanger is communicated with the air inlet of the condenser; one end of the feed back pipe is communicated with the air outlet of the refrigerator, the other end of the feed back pipe is communicated with the cold air inlet of the waste heat recovery heat exchanger, and the hot air outlet of the waste heat recovery heat exchanger is communicated with the coating machine.
As a further improvement of the scheme, the non-condensable gas deep recovery treatment device further comprises an NMP waste liquid rectification purification unit, wherein a non-condensable gas collecting pipe is connected to an exhaust gas inlet of the non-condensable gas temporary storage tank, and air outlets of vacuum pumps of the NMP waste liquid rectification purification unit are all communicated with the non-condensable gas collecting pipe.
As a further improvement of the scheme, the non-condensable gas deep recovery treatment device further comprises an NMP waste liquid tank, and the NMP waste liquid tank is communicated with liquid draining ports of the condenser and the refrigerator through a waste liquid collecting pipe.
Compared with the prior art, the utility model has the following beneficial effects:
1. According to the utility model, the non-condensable gas temporary storage tank collects the non-condensable gas generated by the NMP waste liquid rectification purification unit, the non-condensable gas and the NMP waste gas of the NMP waste gas recovery unit are subjected to spray treatment uniformly, the equipment investment is saved, and the recoverable component in the non-condensable gas generated by the NMP waste liquid rectification purification unit can be subjected to advanced treatment recovery through the spray absorption tower.
2. According to the utility model, the pressure difference type one-way valve is arranged on the connecting pipe, and synchronous advanced treatment of noncondensable gas generated by the NMP waste liquid rectifying and purifying unit is realized under the running state of the spray absorption tower of the NMP waste gas recovering unit.
3. The utility model has the remarkable characteristics of simple operation, low cost, small occupied area, environmental friendliness and the like, and has good engineering application prospect.
Drawings
Fig. 1 is a schematic structural diagram of a deep recovery processing device for noncondensable gas according to an embodiment of the present utility model.
Reference numerals: 1. spraying an absorption tower; 2. a temporary storage tank for non-condensable gas; 3. a feed pipe; 4. a connecting pipe; 5. a one-way valve; 6. a condenser; 7. a freezer; 8. a waste heat recovery heat exchanger; 9. a non-condensable gas collecting pipe; 10. a vacuum pump; 11. a light component removing rectifying tower; 12. a dehydration rectifying tower; 13. a heavy-removal rectifying tower; 14. NMP waste liquid tank; 15. and a feed back pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
This embodiment is to current NMP waste gas recovery unit and rectification purification unit in independent operation in-process, all need set up tail gas treatment device and handle exhaust gas, cause the technical problem of device repeated construction, provide a noncondensable gas degree of depth recovery processing device for the noncondensable gas of NMP waste liquid rectification purification unit's production can be unified with NMP waste gas of NMP waste gas recovery unit and handle, saving equipment investment, recoverable component accessible spray absorption tower among the noncondensable gas of NMP waste liquid rectification purification unit production realizes degree of depth treatment recovery.
Referring to fig. 1, the non-condensable gas deep recovery processing device of the present embodiment includes a spray absorption tower 1, a non-condensable gas temporary storage tank 2, a condensation freezing unit, a waste heat recovery heat exchanger 8, an NMP waste liquid tank, and an NMP waste liquid rectification purification unit.
The waste heat recovery heat exchanger 8 is provided with a heat exchange assembly and is provided with a hot gas inlet, a hot gas outlet, a cold gas inlet and a cold gas outlet. The hot gas inlet and the hot gas outlet of the waste heat recovery heat exchanger 8 are communicated with the coating machine, NMP waste gas with higher temperature generated by coating enters the waste heat recovery heat exchanger 8 through the hot gas inlet, the temperature is reduced after heat exchange is performed through the heat exchange component, and the waste gas is discharged from the cold gas outlet, so that the waste heat of the NMP waste gas can be utilized; and the cold air enters the waste heat recovery heat exchanger 8 from the cold air inlet, undergoes heat exchange through the heat exchange component, and then is increased in temperature, and is discharged from the hot air outlet and returns to the coating machine again. In this embodiment, the heat recovery heat exchanger 8 is a vacuum brazing plate heat exchanger in the prior art, and will not be described in detail here.
The condensing and freezing unit comprises a condenser 6 and a freezer 7. The condenser 6 is provided with a condensing component, the condensing component adopts cooling water as condensing medium, and an air inlet of the condenser 6 is communicated with a cold air outlet of the waste heat recovery heat exchanger 8. The freezer 7 is provided with a freezing component, and the freezing component adopts chilled water as a freezing medium, and an air inlet of the freezer 7 is communicated with an air outlet of the condenser 6. NMP waste gas subjected to heat exchange through the waste heat recovery heat exchanger 8 is sequentially condensed through the condenser 6 and the refrigerator 7 to form NMP waste liquid. The NMP waste liquid tank 14 is communicated with the liquid discharge ports of the condenser 6 and the refrigerator 7 through waste liquid collecting pipes, so that NMP waste liquid is collected.
One end of a feed back pipe 15 is communicated with an air outlet of the refrigerator 7, and the other end of the feed back pipe 15 is communicated with a cold air inlet of the waste heat recovery heat exchanger 8. One end of the feeding pipe 3 is communicated with an air outlet of the freezer 7, and the other end of the feeding pipe 3 is communicated with an air inlet of the spray absorption tower 1. NMP waste gas discharged from the coater contains about 2000ppm of NMP, the NMP content in the NMP waste gas after condensation freezing treatment is reduced to 200ppm, the NMP waste gas can not meet the environmental protection standard of the discharged atmosphere, and most (about 95%) of NMP waste gas after condensation freezing treatment enters a waste heat recovery heat exchanger 8 through a material return pipe 15 for heat exchange and temperature rise and then returns to the coater; in order to control the coater to achieve micro negative pressure, a small part (about 5%) of NMP waste gas after condensation and freezing treatment is sent into the spray absorption tower 1 through the feed pipe 3, NMP in the NMP waste gas contacts atomized liquid in the spray absorption tower 1 to form NMP liquid, and the NMP liquid is directly discharged after reaching the external discharge atmospheric environmental protection standard.
The waste gas outlet of the non-condensable gas temporary storage tank 2 is communicated with the feed pipe 3 through a connecting pipe 4, and a one-way valve 5 which enables the gas of the non-condensable gas temporary storage tank 2 to enter the feed pipe 3 is arranged on the connecting pipe 4. The waste gas inlet of the non-condensable gas temporary storage tank 2 is connected with a non-condensable gas collecting pipe 9. The check valve 5 is a differential pressure type check valve 5, when the spray absorption tower 1 is in an operating state, and when the pressure P1 in the feed pipe 3 is smaller than the pressure P2 in the connecting pipe 4 due to Bernoulli effect generated by medium flow in the feed pipe 3, the check valve 5 is opened to enable the gas of the non-condensable gas temporary storage tank 2 to enter the feed pipe 3.
The NMP waste liquid rectification and purification unit comprises a light-removal rectifying tower, a dehydration rectifying tower and a heavy-removal rectifying tower, and NMP waste liquid is sequentially treated by the light-removal rectifying tower 11, the dehydration rectifying tower 12 and the heavy-removal rectifying tower 13 to realize separation and purification of liquid phase materials. Due to the action of the vacuum pump 10, a certain amount of non-condensable gas is collected by the non-condensable gas collecting pipe 9 and finally stored in the non-condensable gas temporary storage tank 2.
In this embodiment, the non-condensable gas generated by the vacuum pump 10 of the NMP waste liquid rectification and purification unit is directly sent to the non-condensable gas temporary storage tank 2, and is finally treated with the tail gas of the NMP waste gas recovery unit in a unified way, so that the equipment investment is saved, and the recoverable component in the non-condensable gas generated by the NMP waste liquid rectification and purification unit can be recovered through the spray absorption tower 1. The non-condensable gas temporary storage tank 2 is connected with the spray absorption tower 1 through the pressure opening type one-way valve 5, the pressure P1 of the feed pipe 3 is reduced due to the Bernoulli effect generated by medium flow in the feed pipe 3 only under the condition of the operation state of the spray absorption tower 1, the pressure P2 in the connecting pipe 4 is smaller than the pressure P1, the one-way valve 5 is opened at the moment, and the non-condensable gas and NMP waste gas enter the spray absorption tower 1 together for unified treatment, so that the deep treatment recovery of recoverable components is realized, and the material recovery efficiency is improved. When the spray absorption tower 1 is not operated, the one-way valve 5 cannot generate pressure difference at two sides of the one-way valve 5 due to no medium in the air inlet pipeline of the spray absorption tower 1, namely the valve is in a cut-off state, and the non-condensable gas cannot enter the non-operated spray absorption tower 1 and is stored in the non-condensable gas temporary storage tank 2.
It is noted that when an element is referred to as being "mounted to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (7)
1. The utility model provides a non-congealing gas degree of depth recovery processing device, its characterized in that includes spray absorption tower (1) and is used for collecting temporary storage non-congealing gas temporary storage jar (2), and the waste gas import of spray absorption tower (1) is connected with inlet pipe (3), and the waste gas export of non-congealing gas temporary storage jar (2) is through connecting pipe (4) and inlet pipe (3) intercommunication and have on connecting pipe (4) to make the check valve (5) that the gas of non-congealing gas temporary storage jar (2) got into inlet pipe (3).
2. The non-condensable gas deep recovery processing device according to claim 1, wherein the check valve (5) is a differential pressure type check valve, and when the pressure P1 in the feed pipe (3) is smaller than the pressure P2 in the non-condensable gas temporary storage tank (2), the check valve (5) is opened to allow the gas in the non-condensable gas temporary storage tank (2) to enter the feed pipe (3) through the connecting pipe (4).
3. The non-condensable gas deep recovery processing device according to claim 1, further comprising a condensation freezing unit, wherein an air outlet of the condensation freezing unit is communicated with one end of the feed pipe (3) far away from the spray absorption tower (1), an air inlet of the condensation freezing unit is used for receiving NMP waste gas from the coater, and the NMP waste gas subjected to condensation freezing processing by the condensation freezing unit enters the spray absorption tower (1) from the feed pipe (3).
4. The non-condensable gas deep recovery processing device according to claim 3, wherein the condensation freezing unit comprises a condenser (6) and a freezer (7), the condenser (6) is provided with a condensation component, the condensation component adopts cooling water as a condensation medium, the freezer (7) is provided with a freezing component, the freezing component adopts chilled water as a freezing medium, an air outlet of the condenser (6) is communicated with an air inlet of the freezer (7), and an air outlet of the freezer (7) is communicated with the feed pipe (3).
5. The non-condensable gas deep recovery processing device according to claim 4, further comprising a waste heat recovery heat exchanger (8) and a feed back pipe (15); the waste heat recovery heat exchanger (8) is provided with a heat exchange assembly, a hot gas inlet, a hot gas outlet, a cold gas inlet and a cold gas outlet, wherein the hot gas inlet is communicated with the cold gas outlet, the cold gas inlet is communicated with the hot gas outlet, the hot gas inlet of the waste heat recovery heat exchanger (8) is communicated with the coating machine and is used for receiving NMP waste gas from the coating machine, and the cold gas outlet of the waste heat recovery heat exchanger (8) is communicated with the air inlet of the condenser (6); one end of a feed back pipe (15) is communicated with an air outlet of the refrigerator (7) and the other end of the feed back pipe is communicated with a cold air inlet of the waste heat recovery heat exchanger (8), and a hot air outlet of the waste heat recovery heat exchanger (8) is communicated with the coating machine.
6. The non-condensable gas deep recovery processing device according to claim 1, further comprising an NMP waste liquid rectification purification unit, wherein the waste gas inlet of the non-condensable gas temporary storage tank (2) is connected with a non-condensable gas collecting pipe (9), and the air outlets of the vacuum pumps (10) of the NMP waste liquid rectification purification unit are all communicated with the non-condensable gas collecting pipe (9).
7. The deep non-condensable gas recovery processing device according to claim 4, further comprising an NMP waste liquid tank (14), wherein the NMP waste liquid tank (14) is communicated with liquid discharge ports of the condenser (6) and the freezer (7) through a waste liquid collecting pipe.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221267636U true CN221267636U (en) | 2024-07-05 |
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| GR01 | Patent grant |