CN214308270U - Heat exchanger for NMP waste gas recovery system - Google Patents
Heat exchanger for NMP waste gas recovery system Download PDFInfo
- Publication number
- CN214308270U CN214308270U CN202120204184.9U CN202120204184U CN214308270U CN 214308270 U CN214308270 U CN 214308270U CN 202120204184 U CN202120204184 U CN 202120204184U CN 214308270 U CN214308270 U CN 214308270U
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- nmp
- gas
- heat exchanger
- gas cooling
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- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 239000002912 waste gas Substances 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 69
- 238000001816 cooling Methods 0.000 claims abstract description 40
- 239000002826 coolant Substances 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 32
- 239000007921 spray Substances 0.000 description 29
- 238000010521 absorption reaction Methods 0.000 description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to a heat exchanger for NMP waste gas recovery system, it include the casing with set up in a plurality of gas cooling pipeline inside the casing, it is a plurality of gas cooling pipeline's outer wall encloses into the coolant passageway each other, the coolant passageway comprises a plurality of subchannels, the subchannel is the hexagon structure, arbitrary adjacent two gas cooling pipeline symmetric distribution and reciprocal anchorage enclose into a plurality of subchannels. The utility model discloses a set up the gas cooling pipeline of curved structure, make NMP high-temperature gas's flow velocity slow down, prolonged the time that NMP high-temperature gas stops in gas cooling pipeline inside, make NMP high-temperature gas and the outer condensing medium of gas cooling pipeline fully carry out the heat transfer in order to improve heat exchange efficiency.
Description
Technical Field
The utility model relates to a waste gas recovery equipment field, in particular to a heat exchanger for NMP waste gas recovery system.
Background
N-methyl pyrrolidone (1-methyl-2-pyrrolidone, NMP for short) is colorless transparent liquid, the boiling point is 204 ℃, the flash point is 95 ℃, the viscosity is low, the liquid has ammonia smell, the chemical stability and the thermal stability are good, the polarity is high, the volatility is low, and the liquid can be mutually dissolved with water in any ratio.
NMP is the main component of waste gas discharged in the production of lithium ion batteries, is a toxic gas and has the content of 0.06% -0.5%. If NMP is not recycled, not only is environmental pollution caused, but also a great deal of waste of raw materials is caused, so that the recycling of NMP is an important link influencing environmental protection in the production process of green batteries.
Chinese patent No. CN206930193U discloses a heat exchanger and NMP waste gas recovery system, the heat exchanger includes a housing, a condensed medium passage and a condensed medium passage disposed inside the housing, the condensed medium passage includes a flow channel disposed inside the housing, the inner wall of the flow channel is provided with a plurality of baffle teeth, and the baffle teeth are disposed along the flow direction of the condensed medium in a reverse inclination manner. By utilizing the heat exchanger and the NMP waste gas recovery system, the problem of low recovery efficiency caused by poor heat exchange effect of the heat exchanger in the prior art can be solved, and the technical effect of improving the recovery efficiency is achieved. However, the heat exchanger has the disadvantages that a plurality of flow blocking teeth are required to be arranged on the inner wall of the flow pipeline, the equipment structure is complex, the production process is complicated, and the manufacturing cost is increased.
Therefore, it is required to provide a heat exchanger for NMP waste gas recovery system to solve the above problems of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a heat exchanger for NMP waste gas recovery system to it is complicated to solve the existing equipment structure, and the production process is loaded down with trivial details, problem that the cost of manufacture is high.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a heat exchanger for NMP waste gas recovery system, its includes the casing with set up in a plurality of gas cooling pipeline inside the casing is a plurality of gas cooling pipeline's outer wall encloses into the coolant passageway each other, the coolant passageway comprises a plurality of subchannels, the subchannel is the hexagon structure, arbitrary adjacent two gas cooling pipeline symmetric distribution and reciprocal anchorage enclose into a plurality of subchannels.
The gas cooling conveying pipeline comprises a plurality of groups of bent sections, every two adjacent bent sections are connected through a vertical section, and the bent sections, the vertical sections and the gas cooling conveying pipelines on the two sides form small channels in a surrounding mode.
The bending section comprises a first inclined section, a first vertical section and a second inclined section which are sequentially connected, and the first inclined section and the second inclined section are symmetrical to each other.
The gas cooling conveying pipelines are fixed together through a winding belt, and the winding mode of the winding belt is S-shaped.
The shell comprises an upper section, a middle section and a lower section, wherein the upper section is provided with a first outlet, and the lower section is provided with a first inlet and a recovery port.
The middle section is the cuboid structure, and its cross section is the square, gas cooling pipeline's cross section is the rectangle, and is a plurality of gas cooling pipeline sets up the inside in middle section.
And a second inlet and a second outlet are formed in the side wall of the middle section.
Compared with the prior art, the beneficial effects of the utility model are that: the heat exchanger makes the flow speed of NMP high-temperature gas slow down through the gas cooling pipeline who sets up curved structure, has prolonged the time of NMP high-temperature gas at the inside dwell of gas cooling pipeline, makes NMP high-temperature gas and the outer condensing medium of gas cooling pipeline fully carry out the heat transfer in order to improve heat exchange efficiency.
Drawings
FIG. 1 is a block diagram of the NMP waste gas recovery system of the present invention;
FIG. 2 is a schematic diagram of the heat exchanger of FIG. 1;
FIG. 3 is a front view of the gas-cooled delivery conduit of FIG. 2;
FIG. 4 is a top view of the gas-cooled delivery conduit of FIG. 3;
FIG. 5 is a schematic view of the adsorption column of FIG. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1 to 5, the utility model relates to a NMP waste gas recovery system, it is including the coating machine 10 that connects gradually, coating machine exhaust fan 20, heat exchanger 30, main fan 40 and the combination of spray absorption tower, the combination of spray absorption tower is including the one-level that connects gradually sprays absorption tower 51, second grade sprays absorption tower 52 and tertiary spray absorption tower 53, one-level sprays absorption tower 51, second grade sprays absorption tower 52, the bottom of tertiary spray absorption tower 53 all has the liquid storage area (not shown), the recovery liquid in the liquid storage area discharges through a drainage pump 60, the exit end of drainage pump 60 is connected with transfer liquid storage pot 70, tertiary spray absorption tower 53 is connected with heat exchanger 30 through return air pipe 80, heat exchanger 30 still is connected with return air fan 90, return air fan 90's air-out end is connected with coating machine 10.
Referring to fig. 1, the first-stage spray absorption tower 51, the second-stage spray absorption tower 52 and the third-stage spray absorption tower 53 are respectively connected with a spray pump 100, a second heat exchanger 110 is arranged between the first-stage spray absorption tower 51 and the spray pump 100, and a third heat exchanger 120 is arranged between the second-stage spray absorption tower 52 and the spray pump 100.
Specifically, when the primary spray absorption tower 51 performs the spraying operation, the spray pump 100 provides chilled water to the primary spray absorption tower 51, the chilled water absorbs heat in the primary spray absorption tower 51, the temperature rises, the water with higher temperature is discharged from the primary spray absorption tower 51 to the second heat exchanger 110, heat exchange is performed in the second heat exchanger 110, the water with higher temperature is changed into cold water, the spray pump 100 continues to provide chilled water to the primary spray absorption tower 51, and then the heat generated by the heat exchange is recovered. The heat exchanger 30 is arranged to primarily recover the heat of the NMP waste gas; a second heat exchanger 110 is arranged between the first-stage spray absorption tower 51 and the spray pump 100, and waste heat in NMP waste gas is recovered, so that heat is completely recovered.
The end of giving vent to anger of tertiary spray absorption tower 53 still is connected with adsorption tower 130 for carry out adsorption treatment to remaining waste gas in the NMP waste gas, the gas after adsorption tower 130 handles can be discharged to the atmosphere, effectively avoids residual gas to cause the pollution to the atmosphere.
The NMP waste gas recovery system also includes a purified water make-up source 140 for providing purified water to the spray absorber combination.
In this embodiment, referring to fig. 2, the heat exchanger 30 includes a housing 31 and a plurality of gas cooling delivery pipelines 32 disposed inside the housing 31, outer walls of the plurality of gas cooling delivery pipelines 32 mutually enclose a cooling medium channel 33, the cooling medium channel 33 is composed of a plurality of small channels 331, the small channels 331 are in a hexagonal structure, and any two adjacent gas cooling delivery pipelines 32 are symmetrically distributed and mutually fixed and enclose the plurality of small channels 331.
Specifically, referring to fig. 3, the gas cooling conveying pipe 32 includes a plurality of sets of curved sections 321, two adjacent curved sections 321 are connected by a vertical section 322, and the curved sections 321, the vertical section 322 and the gas cooling conveying pipe 32 on two sides all enclose a small channel 331.
The bending section 321 includes a first inclined section 3211, a first vertical section 3212 and a second inclined section 3213, which are connected in sequence, and the first inclined section 3211 and the second inclined section 3213 are symmetrical to each other.
The plurality of gas cooling conveying pipelines 32 are fixed together through the winding belt, the winding mode of the winding belt is S-shaped, the plurality of gas cooling conveying pipelines 32 are prevented from loosening, and the deformation of the cooling medium channel 33 is avoided.
Referring to fig. 4, the gas-cooled delivery conduit 32 is rectangular in cross-section, the upper end of the gas-cooled delivery conduit 32 has an inlet 323, and a plurality of gas-cooled delivery conduits 32 are distributed within the housing 31.
Referring to fig. 2, the housing 31 includes an upper section 311, a middle section 312 and a lower section 313, the upper section 311 is provided with a first outlet 3111, the lower section 313 is provided with a first inlet 3131 and a recovery port 3132, the NMP high-temperature gas enters the gas cooling conveying pipeline 32 from the first inlet 3131 and then is output outwards through the first outlet 3111, and the recovery port 3132 is used for recovering the condensed and refluxed NMP liquid. The heat exchanger 30 in this embodiment is used vertically, that is, NMP high temperature gas enters from the first inlet 3131 at the bottom and moves upward in the gas cooling transfer pipe 32, uncondensed NMP gas flows out from the first outlet 3111, and the condensed NMP gas forms NMP liquid, flows downward, and flows out through the recovery port 3132.
Referring to fig. 2, the middle section 312 is a rectangular parallelepiped structure with a square cross section, a plurality of gas cooling ducts are provided inside the middle section, and the side wall of the middle section 312 is provided with a second inlet 3121 and a second outlet 3122. After the condensed medium, for example, air, enters from the second inlet 3121, flows through the cooling medium passage 33 in the middle section 312, exchanges heat with the NMP gas in the gas cooling transfer pipe 32, and then flows out from the second outlet 3122.
The utility model discloses the heat exchanger 30 that sets up makes NMP high-temperature gas's flow velocity slow down through the gas cooling pipeline 32 that sets up curved structure, has prolonged the time of NMP high-temperature gas at the inside dwell of gas cooling pipeline 32, makes NMP high-temperature gas and the outer condensing medium of gas cooling pipeline 32 fully carry out the heat transfer in order to improve heat exchange efficiency.
Referring to fig. 5, the adsorption tower 130 includes a tower body 131, a plurality of groups of activated carbon adsorption assemblies 132 are vertically disposed in the tower body 131, each activated carbon adsorption assembly 132 includes a fixing frame 1321 for accommodating activated carbon, each fixing frame 1321 is formed by assembling a left net plate 13211 and a right net plate 13212 which are symmetrical to each other, each of the left net plate 13211 and the right net plate 13212 is a wave-shaped structure, and in addition, two adjacent fixing frames 1321 enclose an air channel 133.
The upper end of the tower body 131 is provided with a gas inlet 134, the lower end of the tower body 131 is provided with a gas outlet 135, gas exhausted from the three-stage spray absorption tower 53 enters the gas channel 133 through the gas inlet 134, and clean gas is exhausted from the gas outlet 135 after being adsorbed by the activated carbon of the activated carbon adsorption component 132.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A heat exchanger for an NMP waste gas recovery system, characterized by: the gas cooling system comprises a shell and a plurality of gas cooling conveying pipelines arranged in the shell, wherein the outer walls of the plurality of gas cooling conveying pipelines mutually enclose a cooling medium channel, the cooling medium channel is composed of a plurality of small channels, the small channels are of hexagonal structures, and any two adjacent gas cooling conveying pipelines are symmetrically distributed, mutually fixed and enclose a plurality of small channels.
2. The heat exchanger for an NMP effluent gas recovery system according to claim 1, wherein: the gas cooling conveying pipeline comprises a plurality of groups of bent sections, every two adjacent bent sections are connected through a vertical section, and the bent sections, the vertical sections and the gas cooling conveying pipelines on the two sides form small channels in a surrounding mode.
3. The heat exchanger for an NMP effluent gas recovery system according to claim 2, wherein: the bending section comprises a first inclined section, a first vertical section and a second inclined section which are sequentially connected, and the first inclined section and the second inclined section are symmetrical to each other.
4. The heat exchanger for an NMP off-gas recovery system according to claim 2 or 3, characterized in that: the gas cooling conveying pipelines are fixed together through a winding belt, and the winding mode of the winding belt is S-shaped.
5. The heat exchanger for an NMP effluent gas recovery system according to claim 1, wherein: the shell comprises an upper section, a middle section and a lower section, wherein the upper section is provided with a first outlet, and the lower section is provided with a first inlet and a recovery port.
6. The heat exchanger for an NMP effluent gas recovery system according to claim 5, wherein: the middle section is the cuboid structure, and its cross section is the square, gas cooling pipeline's cross section is the rectangle, and is a plurality of gas cooling pipeline sets up the inside in middle section.
7. The heat exchanger for an NMP effluent gas recovery system according to claim 6, wherein: and a second inlet and a second outlet are formed in the side wall of the middle section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120204184.9U CN214308270U (en) | 2021-01-25 | 2021-01-25 | Heat exchanger for NMP waste gas recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120204184.9U CN214308270U (en) | 2021-01-25 | 2021-01-25 | Heat exchanger for NMP waste gas recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214308270U true CN214308270U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120204184.9U Expired - Fee Related CN214308270U (en) | 2021-01-25 | 2021-01-25 | Heat exchanger for NMP waste gas recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214308270U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116573843A (en) * | 2023-07-13 | 2023-08-11 | 张家港市锦明机械有限公司 | Annealing kiln capable of recycling waste heat |
-
2021
- 2021-01-25 CN CN202120204184.9U patent/CN214308270U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116573843A (en) * | 2023-07-13 | 2023-08-11 | 张家港市锦明机械有限公司 | Annealing kiln capable of recycling waste heat |
| CN116573843B (en) * | 2023-07-13 | 2023-09-12 | 张家港市锦明机械有限公司 | Annealing kiln capable of recycling waste heat |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210928 |