CN219983946U - NMP solvent refining and concentrating device - Google Patents
NMP solvent refining and concentrating device Download PDFInfo
- Publication number
- CN219983946U CN219983946U CN202321085422.4U CN202321085422U CN219983946U CN 219983946 U CN219983946 U CN 219983946U CN 202321085422 U CN202321085422 U CN 202321085422U CN 219983946 U CN219983946 U CN 219983946U
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- solvent
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- 239000002904 solvent Substances 0.000 title claims abstract description 240
- 238000007670 refining Methods 0.000 title claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 37
- 238000000197 pyrolysis Methods 0.000 claims description 9
- 150000001345 alkine derivatives Chemical class 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 10
- 229920000642 polymer Polymers 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 abstract description 5
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 abstract description 5
- 239000003345 natural gas Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000008676 import Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model relates to the technical field of acetylene production by natural gas, in particular to an NMP solvent refining and concentrating device, which comprises a dirty solvent storage tank, a stripping tower, a first solvent processor, a second solvent processor, a fresh solvent storage tank and a solvent buffer tank, wherein a dirty solvent inlet pipeline is communicated between the dirty solvent storage tank and the stripping tower, a raw solvent input pipeline is communicated between the stripping tower and the first solvent processor, a first fresh solvent output pipeline is communicated with the first solvent processor, a new solvent input pipeline is communicated between the raw solvent input pipeline and the second solvent processor, and a fresh solvent storage pipeline is communicated between the second solvent processor and the fresh solvent storage tank. The utility model has reasonable and compact structure and convenient use, reduces the accumulated attachment time of polymers in the system, can effectively reduce the blockage problem of equipment and the frequency of starting and stopping, saves the running cost, reduces the environmental protection pressure, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.
Description
Technical Field
The utility model relates to the technical field of acetylene production by natural gas, and discloses an NMP solvent refining and concentrating device.
Background
The dry distillation slag is generated about 300t each year in the process of preparing acetylene from natural gas, and directly enters into the coal blended by a power plant to be burnt in a boiler, wherein about 20% of NMP solvent is attached to the dry distillation slag, so that the loss of the NMP solvent remained in the dry distillation slag is caused, and the production cost is increased. In addition, the process for preparing acetylene from natural gas needs to be thoroughly overhauled once every year, and all towers, pipelines, fillers and the like need to be washed with water before and after overhauling, and polymers attached to the towers, the pipelines, the fillers and the like and NMP solvents are washed with water.
On the one hand, the washing work recycles the residual NMP solvent of the system, and on the other hand, the polymer attached to the tower, the pipeline and the filler is washed, so that the safety risk and the environmental protection pressure in the overhaul process are reduced. The mixture of water and NMP solvent generated in the process can not be recycled timely through the existing solvent recycling device, so that NMP solvent consumption is increased continuously, and production cost is increased. And the polymer contained in the mixed solution is gradually accumulated in the system after being recovered, and the polymer in the solvent is deposited and blocked in the towers, equipment and pipelines, so that secondary blocking and pollution of the system are easily caused, and long-term operation of the system is severely restricted.
Disclosure of Invention
The utility model provides an NMP solvent refining and concentrating device, which overcomes the defects of the prior art, and can effectively solve the problems that the system is blocked due to continuous accumulation of polymers in the existing production of acetylene by natural gas, and the NMP solvent consumption is increased due to the fact that mixed liquid cannot be recycled in time.
The technical scheme of the utility model is realized by the following measures: the utility model provides a refined enrichment facility of NMP solvent, including dirty solvent storage tank, the stripper, first solvent treater, the second solvent treater, fresh solvent storage tank and solvent buffer tank, stripper top export fixed intercommunication has senior alkyne gas pipeline, fixed intercommunication has dirty solvent to advance the tower pipeline between dirty solvent storage tank lower part export and the stripper upper portion import, fixed intercommunication has former solvent input pipeline between stripper bottom export and the first solvent treater lower part import, fixed intercommunication has first fresh solvent output line at first solvent treater top export, fixed intercommunication has new solvent input pipeline between former solvent input pipeline and the second solvent treater lower part import, fixed intercommunication has fresh solvent storage pipeline between second solvent treater top export and the fresh solvent storage tank upper portion import, fixed intercommunication has solvent buffer pipeline between fresh solvent storage pipeline and the solvent buffer tank upper portion import, first solvent treater and second solvent treater bottom all are provided with the drain.
The following are further optimizations and/or improvements to the above-described inventive solution:
the original solvent input pipeline between the stripping tower and the new solvent input pipeline is fixedly provided with a solvent input pump, the original solvent input pipeline between the first solvent processor and the new solvent input pipeline is fixedly provided with a first valve, and the new solvent input pipeline is fixedly provided with a second valve.
And a solvent circulating pipeline is fixedly communicated with an original solvent input pipeline between the first solvent processor and the new solvent input pipeline, and a third valve is fixedly arranged on the solvent circulating pipeline.
The solvent circulating pipeline is fixedly communicated with a solvent discharge pipeline, and a fourth valve is fixedly arranged on the solvent discharge pipeline.
A fifth valve is fixedly arranged on a fresh solvent storage pipeline between the solvent buffer pipeline and the fresh solvent storage tank, and a sixth valve is fixedly arranged on the solvent buffer pipeline.
And a second fresh solvent output pipeline is fixedly communicated with a fresh solvent storage pipeline between the solvent buffer pipeline and the second solvent processor, and a seventh valve is fixedly arranged on the second fresh solvent output pipeline.
And a new solvent input pipeline between the second solvent processor and the second valve is fixedly communicated with a dirty solvent input pipeline, and an eighth valve is fixedly arranged on the dirty solvent input pipeline.
And a dry distillation residue solvent input pipeline is fixedly communicated with the dirty solvent input pipeline between the eighth valve and the dirty solvent input pipeline inlet.
The utility model has reasonable and compact structure and convenient use, reduces the accumulated attachment time of polymers in the system, can effectively reduce the blockage problem of equipment and the frequency of starting and stopping, saves the running cost, reduces the environmental protection pressure, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.
Drawings
FIG. 1 is a schematic diagram of the process flow of the utility model.
The codes in fig. 1 are respectively: 1 is a dirty solvent storage tank, 2 is a stripping tower, 3 is a first solvent processor, 4 is a second solvent processor, 5 is a fresh solvent storage tank, 6 is a solvent buffer tank, 7 is a high-grade alkyne gas pipeline, 8 is a dirty solvent inlet pipeline, 9 is an original solvent input pipeline, 10 is a first fresh solvent output pipeline, 11 is a new solvent input pipeline, 12 is a fresh solvent storage pipeline, 13 is a solvent buffer pipeline, 14 is a solvent input pump, 15 is a first valve, 16 is a second valve, 17 is a solvent circulation pipeline, 18 is a third valve, 19 is a solvent discharge pipeline, 20 is a fourth valve, 21 is a fifth valve, 22 is a sixth valve, 23 is a second fresh solvent output pipeline, 24 is a seventh valve, 25 is a dirty solvent input pipeline, 26 is an eighth valve, and 27 is a dry distillation residue solvent input pipeline.
Detailed Description
The present utility model is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present utility model.
In the present utility model, unless otherwise specified, the devices and apparatuses used are all known and commonly used in the art.
In the present utility model, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The utility model is further described below with reference to examples and figures:
example 1: as shown in figure 1, the NMP solvent refining and concentrating device comprises a dirty solvent storage tank 1, a stripping tower 2, a first solvent processor 3, a second solvent processor 4, a fresh solvent storage tank 5 and a solvent buffer tank 6, wherein an outlet at the top of the stripping tower 2 is fixedly communicated with a high-grade alkyne gas pipeline 7, a dirty solvent inlet pipeline 8 is fixedly communicated between an outlet at the lower part of the dirty solvent storage tank 1 and an inlet at the upper part of the stripping tower 2, an original solvent input pipeline 9 is fixedly communicated between an outlet at the bottom of the stripping tower 2 and an inlet at the lower part of the first solvent processor 3, a first fresh solvent output pipeline 10 is fixedly communicated with an outlet at the top of the first solvent processor 3, a new solvent input pipeline 11 is fixedly communicated between the original solvent input pipeline 9 and an inlet at the lower part of the second solvent processor 4, a fresh solvent storage pipeline 12 is fixedly communicated between the outlet at the top of the second solvent processor 4 and the inlet at the upper part of the fresh solvent storage tank 5, a solvent buffer pipeline 13 is fixedly communicated between the fresh solvent storage pipeline 12 and the inlet at the upper part of the solvent buffer tank 6, and drain outlets are arranged at the bottoms of the first solvent processor 3 and the second solvent processor 4.
The NMP solvent refining and concentrating device can be further optimized or/and improved according to actual needs:
example 2: which differs from example 1 in that: as shown in fig. 1, a solvent input pump 14 is fixedly installed on the raw solvent input pipeline 9 between the stripping tower 2 and the new solvent input pipeline 11, a first valve 15 is fixedly installed on the raw solvent input pipeline 9 between the first solvent processor 3 and the new solvent input pipeline 11, and a second valve 16 is fixedly installed on the new solvent input pipeline 11.
According to the requirement, the solvent with high polymer content at the bottom of the stripping tower 2 is input into the second solvent processor 4, so that the operation period of the first solvent processor 3 can be effectively relieved, and the first solvent processor 3 can be stopped, switched and overhauled if necessary.
Example 3: which differs from examples 1 to 2 in that: as shown in fig. 1, a solvent circulation pipeline 17 is fixedly connected to the original solvent input pipeline 9 between the first solvent processor 3 and the new solvent input pipeline 11, and a third valve 18 is fixedly arranged on the solvent circulation pipeline 17.
Example 4: which differs from examples 1 to 3 in that: as shown in fig. 1, a solvent discharge line 19 is fixedly connected to the solvent circulation line 17, and a fourth valve 20 is fixedly installed on the solvent discharge line 19.
Example 5: which differs from examples 1 to 4 in that: as shown in fig. 1, a fifth valve 21 is fixedly arranged on the fresh solvent storage pipeline 12 between the solvent buffer pipeline 13 and the fresh solvent storage tank 5, and a sixth valve 22 is fixedly arranged on the solvent buffer pipeline 13.
According to the requirement, mechanical sealing is provided for the running pump in the production of the device, and the fresh solvent treated by the second solvent processor 4 is led out to the solvent buffer tank 6 to be reused as the mechanical sealing.
Example 6: which differs from examples 1 to 5 in that: as shown in fig. 1, a second fresh solvent output line 23 is fixedly connected to the fresh solvent storage line 12 between the solvent buffer line 13 and the second solvent processor 4, and a seventh valve 24 is fixedly installed on the second fresh solvent output line 23.
According to the requirement, the solvent with the purity reaching 98% after being processed by the second solvent processor 4 enters a downstream system for supplementary use, part of the solvent enters the solvent buffer tank 6 to be used as a mechanical sealing flushing liquid of a running machine pump, and the rest of the solvent enters the fresh solvent storage tank 5 to be used in abnormal production.
Example 7: which differs from examples 1 to 6 in that: as shown in fig. 1, a dirty solvent input pipeline 25 is fixedly connected to the new solvent input pipeline 11 between the second solvent processor 4 and the second valve 16, and an eighth valve 26 is fixedly installed on the dirty solvent input pipeline 25.
Example 8: which differs from examples 1 to 7 in that: as shown in fig. 1, a dry distillation residue solvent input pipeline 27 is fixedly communicated with the dirty solvent input pipeline 25 between the eighth valve 26 and the inlet of the dirty solvent input pipeline 25.
If necessary, the second solvent processor 4 may perform flash separation treatment of the mixture liquid having a high water content generated by the apparatus and the NMP solvent mixture liquid precipitated from the dry distillation residue.
According to the requirement, each pipeline of the NMP solvent refining and concentrating device can be provided with a common hand valve, a thermometer, a pressure gauge, a liquid level gauge and the like which are known in the art, so that the normal production of the device is ensured.
According to the utility model, through the first solvent processor 3, the second solvent processor 4, the pipeline, the first valve 15, the second valve 16, the third valve 18, the fourth valve 20, the fifth valve 21, the sixth valve 22, the seventh valve 24 and the eighth valve 26, NMP solvent extraction, separation, distillation and recovery of NMP solvent attached to dry distillation residues can be realized, NMP solvent with high water content can be purified and recycled, NMP solvent with high polymer content in the dirty solvent storage tank 1 can be led out to the second solvent processor 4 for refining treatment, polymer accumulation and attachment time in a system can be reduced, and the blockage problems of equipment, pipelines, towers, fillers and the like can be effectively reduced. And the device can be switched with the original device to operate, so that the frequency of starting and stopping can be reduced to a great extent, the operating cost is saved, the environmental protection pressure is reduced, the long-period operation of the device is ensured, and the green sustainable development target is realized.
The technical characteristics form the embodiment of the utility model, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (8)
1. The NMP solvent refining and concentrating device is characterized by comprising a dirty solvent storage tank, a stripping tower, a first solvent processor, a second solvent processor, a fresh solvent storage tank and a solvent buffer tank, wherein an outlet at the top of the stripping tower is fixedly communicated with a high-grade alkyne gas pipeline, a dirty solvent inlet pipeline is fixedly communicated between an outlet at the lower part of the dirty solvent storage tank and an inlet at the upper part of the stripping tower, an original solvent input pipeline is fixedly communicated between an outlet at the bottom of the stripping tower and an inlet at the lower part of the first solvent processor, a first fresh solvent output pipeline is fixedly communicated with an outlet at the top of the first solvent processor, a new solvent input pipeline is fixedly communicated between the original solvent input pipeline and an inlet at the lower part of the second solvent processor, a fresh solvent storage pipeline is fixedly communicated between an outlet at the top of the second solvent processor and an inlet at the upper part of the fresh solvent storage tank, and a solvent buffer pipeline is fixedly communicated between the fresh solvent storage pipeline and an inlet at the upper part of the solvent buffer tank, and drain outlets are arranged at the bottoms of the first solvent processor and the second solvent processor.
2. The NMP solvent refining and concentrating apparatus of claim 1 wherein the solvent input pump is fixedly mounted on an original solvent input line between the stripper and the new solvent input line, a first valve is fixedly mounted on the original solvent input line between the first solvent processor and the new solvent input line, and a second valve is fixedly mounted on the new solvent input line.
3. The NMP solvent refining and concentrating apparatus according to claim 1 or 2, characterized in that a solvent circulation line is fixedly connected to an original solvent input line between the first solvent processor and the new solvent input line, and a third valve is fixedly installed on the solvent circulation line.
4. The NMP solvent refining and concentrating apparatus according to claim 3, wherein the solvent circulation line is fixedly connected with a solvent discharge line, and the solvent discharge line is fixedly provided with a fourth valve.
5. The NMP solvent refining and concentrating apparatus according to claim 1, 2 or 4, characterized in that a fifth valve is fixedly installed on a fresh solvent storage line between the solvent buffer line and the fresh solvent storage tank, and a sixth valve is fixedly installed on the solvent buffer line.
6. The NMP solvent refining and concentrating apparatus according to claim 1, 2 or 4, characterized in that a second fresh solvent output line is fixedly connected to the fresh solvent storage line between the solvent buffer line and the second solvent processor, and a seventh valve is fixedly installed on the second fresh solvent output line.
7. The NMP solvent refining and concentrating apparatus according to claim 2 or 4, characterized in that a dirty solvent input line is fixedly connected to a new solvent input line between the second solvent processor and the second valve, and an eighth valve is fixedly installed on the dirty solvent input line.
8. The NMP solvent refining and concentrating apparatus according to claim 7, characterized in that a dry distillation residue solvent input line is fixedly connected to the dirty solvent input line between the eighth valve and the dirty solvent input line inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321085422.4U CN219983946U (en) | 2023-05-08 | 2023-05-08 | NMP solvent refining and concentrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321085422.4U CN219983946U (en) | 2023-05-08 | 2023-05-08 | NMP solvent refining and concentrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219983946U true CN219983946U (en) | 2023-11-10 |
Family
ID=88604364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321085422.4U Active CN219983946U (en) | 2023-05-08 | 2023-05-08 | NMP solvent refining and concentrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219983946U (en) |
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2023
- 2023-05-08 CN CN202321085422.4U patent/CN219983946U/en active Active
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