CN218290448U - Purge gas recovery system for nitrous gas - Google Patents
Purge gas recovery system for nitrous gas Download PDFInfo
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- CN218290448U CN218290448U CN202221659478.1U CN202221659478U CN218290448U CN 218290448 U CN218290448 U CN 218290448U CN 202221659478 U CN202221659478 U CN 202221659478U CN 218290448 U CN218290448 U CN 218290448U
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Abstract
The utility model relates to a relax gassing recovery system for containing nitrous gas, including absorption cycle liquid storage tank, relax gassing import pipeline, absorption cycle liquid storage tank diluted acid export pipeline and absorption cycle liquid storage tank unloading pipeline, still include absorption cycle liquid storage tank desalted water filling pipeline, absorption cycle liquid storage tank backflow pipeline, circulation liquid import pipeline and absorption liquid circulating pump, the well lower part of absorption cycle liquid storage tank is linked together with absorption cycle liquid storage tank backflow pipeline one end, the absorption liquid circulating pump import links to each other with absorption cycle liquid storage tank diluted acid export pipeline other end, and the export of absorption liquid circulating pump links to each other with absorption cycle liquid storage tank backflow pipeline other end and circulation liquid import pipeline one end respectively, and the circulation liquid import pipeline other end is linked together with absorption cycle liquid storage tank. Through the technical scheme, the nitrous gas in the purge gas can be effectively recovered, the empty discharge of the nitrous gas is avoided, and the generated dilute nitric acid can be recovered to a system for recycling.
Description
Technical Field
The utility model relates to a purge gas recovery system in the chemical industry field, in particular to a purge gas recovery system for containing nitrous gas.
Background
In the existing production process of dilute nitric acid in chemical industry, the purge gas of the normal-pressure acid storage tank contains nitrous gas, which is directly discharged from high altitude and seriously pollutes the environment.
SUMMERY OF THE UTILITY MODEL
In view of this, the main object of the utility model is to provide a purge gassing recovery system for containing nitrous gas, through this technical scheme, can effectually retrieve the nitrous gas in the purge gassing, avoided the empty emission of nitrous gas, the rare nitric acid of production still can be retrieved to the system and is recycled.
In order to achieve the above purpose, the technical solution of the present invention is realized as follows: a purge gas recovery system for nitrous gases comprises an absorption circulating liquid storage tank, a purge gas inlet pipeline, an absorption circulating liquid storage tank dilute acid outlet pipeline and an absorption circulating liquid storage tank emptying pipeline, wherein the purge gas inlet pipeline is communicated with the absorption circulating liquid storage tank, the absorption circulating liquid storage tank emptying pipeline is communicated with the top of the absorption circulating liquid storage tank, one end of the absorption circulating liquid storage tank dilute acid outlet pipeline is communicated with the bottom of the absorption circulating liquid storage tank, the purge gas recovery system further comprises an absorption circulating liquid storage tank desalted water adding pipeline, an absorption circulating liquid storage tank backflow pipeline, a circulating liquid inlet pipeline and an absorption liquid circulating pump, the absorption circulating liquid storage tank desalted water adding pipeline is communicated with the middle of the absorption circulating liquid storage tank, the middle lower part of the absorption circulating liquid storage tank is communicated with one end of the absorption circulating liquid storage tank backflow pipeline, an absorption liquid circulating pump inlet is connected with the other end of the absorption circulating liquid storage tank diluted acid outlet pipeline, an outlet of the absorption circulating pump is respectively connected with the other end of the absorption circulating liquid storage tank backflow pipeline and one end of the circulating liquid inlet pipeline, and the other end of the circulating liquid inlet pipeline is communicated with the absorption circulating liquid storage tank.
The absorption ejector is connected with the upper end of the circulating liquid outlet pipeline, the gas phase inlet of the absorption ejector is connected with the purge gas inlet pipeline, and the liquid phase inlet of the absorption ejector is connected with the other end of the circulating liquid inlet pipeline.
As a further technical scheme, the absorption liquid cooling device further comprises an absorption liquid cooling device, wherein a tube pass inlet of the absorption liquid cooling device is connected with the upper end of an outlet pipeline of the absorption liquid circulating pump, a tube pass outlet of the absorption liquid cooling device is connected with a circulating liquid inlet pipeline, the lower end of the outlet pipeline of the absorption liquid circulating pump is connected with an outlet of the absorption liquid circulating pump, the other end of a return pipeline of an absorption circulating liquid storage tank is connected with the outlet pipeline of the absorption liquid circulating pump in an intersecting manner, and a shell pass inlet of the absorption liquid cooling device and a shell pass outlet of the absorption liquid cooling device are respectively connected with a circulating water inlet pipeline and a circulating water outlet pipeline.
As a further technical scheme, the device also comprises a liquid level meter, a pressure gauge and a temperature monitor, wherein the liquid level meter and the temperature monitor are respectively arranged on the side wall of the lower part of the absorption circulation liquid storage tank, and the pressure gauge is arranged on the outer wall of the top part of the absorption circulation liquid storage tank.
As a further technical scheme, the device also comprises a flow monitor, wherein the flow monitor is arranged on an outlet pipeline of the absorption liquid circulating pump connected with an inlet of a tube pass of the absorption liquid cooler.
As a further technical scheme, the device also comprises a desalted water adding valve and a check valve, wherein the desalted water adding valve and the check valve are respectively arranged on a desalted water adding pipeline of the absorption circulating liquid storage tank.
As a further technical scheme, the device also comprises a dilute acid delivery pipeline and a dilute acid delivery valve, wherein the dilute acid delivery pipeline is arranged on an outlet pipeline of the absorption liquid circulating pump after the other end of a backflow pipeline of the absorption circulating liquid storage tank is in intersection connection with an outlet pipeline of the absorption liquid circulating pump, and the dilute acid delivery valve is arranged on the dilute acid delivery pipeline.
As a further technical proposal, the device also comprises a return valve which is arranged on a return pipeline of the absorption cycle liquid storage tank.
The beneficial effect after adopting above-mentioned technical scheme is: a purge gas recovery system for containing nitrous gases can effectively recover the nitrous gases in the purge gas through the technical scheme, so that the air discharge of the nitrous gases is avoided, and the generated dilute nitric acid can be recovered to the system for reuse.
Drawings
Fig. 1 is a schematic view of the overall connection structure of the present invention.
In the figure, 1 absorption circulating liquid storage tank, 2 purge gas inlet pipeline, 3 absorption circulating liquid storage tank dilute acid outlet pipeline, 4 absorption circulating liquid storage tank emptying pipeline, 5 absorption circulating liquid storage tank desalted water adding pipeline, 6 absorption circulating liquid storage tank backflow pipeline, 7 circulating liquid inlet pipeline, 8 absorption liquid circulating pump, 9 absorption ejector, 10 circulating liquid outlet pipeline, 11 absorption liquid cooler, 12 absorption liquid circulating pump outlet pipeline, 13 circulating water inlet pipeline, 14 circulating water outlet pipeline, 15 liquid level meter, 16 pressure gauge, 17 temperature monitor, 18 flow monitor, 19 desalted water adding valve, 20 check valve, 21 dilute acid outward-feeding pipeline, 22 dilute acid outward-feeding valve and 23 backflow valve.
Detailed Description
The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model relates to a purge gas recovery system for containing nitrous gas, including absorption cycle liquid storage tank 1, purge gas inlet pipeline 2, absorption cycle liquid storage tank diluted acid outlet pipeline 3 and absorption cycle liquid storage tank blowdown pipeline 4, purge gas inlet pipeline 2 is linked together with absorption cycle liquid storage tank 1, absorption cycle liquid storage tank blowdown pipeline 4 is linked together with absorption cycle liquid storage tank 1 top, absorption cycle liquid storage tank diluted acid outlet pipeline 3 one end is linked together with absorption cycle liquid storage tank 1 bottom, still includes absorption cycle liquid storage tank desalted water filling pipe 5, absorption cycle liquid storage tank backflow pipeline 6, circulation liquid import pipeline 7 and absorption liquid circulating pump 8, absorption cycle liquid storage tank desalted water filling pipe 5 is linked together with absorption cycle liquid storage tank 1 middle part, the well lower part of absorption cycle liquid storage tank 1 is linked together with absorption cycle liquid storage tank backflow pipeline 6 one end, absorption cycle liquid circulating pump 8 import links to each other end with the absorption cycle liquid storage tank diluted acid outlet pipeline 3, and absorption cycle liquid storage tank backflow pipeline 8 export links to each other end with the absorption cycle liquid storage tank inlet pipeline 6 other end and circulation liquid storage tank import pipeline 7 one end respectively, and circulation liquid circulating pump 7 import pipeline are linked together with the absorption cycle liquid circulating pump 1 other end.
As a further embodiment, the absorption tower further comprises an absorption ejector 9 and a circulating liquid outlet pipeline 10, the lower end of the circulating liquid outlet pipeline 10 penetrates through the top of the absorption circulating liquid storage tank 1 and extends into the lower part in the absorption circulating liquid storage tank 1, a liquid phase outlet of the absorption ejector 9 is connected with the upper end of the circulating liquid outlet pipeline 10, a gas phase inlet of the absorption ejector 9 is connected with the purge gas inlet pipeline 2, and a liquid phase inlet of the absorption ejector 9 is connected with the other end of the circulating liquid inlet pipeline 7.
As a further embodiment, the absorption liquid cooling device further comprises an absorption liquid cooler 11, wherein a tube pass inlet of the absorption liquid cooler 11 is connected with an upper end of an absorption liquid circulating pump outlet pipeline 12, a tube pass outlet of the absorption liquid cooler 11 is connected with a circulating liquid inlet pipeline 7, a lower end of the absorption liquid circulating pump outlet pipeline 12 is connected with an outlet of an absorption liquid circulating pump 8, the other end of a return pipeline 6 of an absorption circulating liquid storage tank is connected with an outlet pipeline 12 of the absorption liquid circulating pump in an intersecting manner, and a shell pass inlet of the absorption liquid cooler 11 and a shell pass outlet of the absorption liquid cooler 11 are respectively connected with a circulating water inlet pipeline 13 and a circulating water outlet pipeline 14.
As a further embodiment, the absorption cycle liquid storage tank further comprises a liquid level meter 15, a pressure gauge 16 and a temperature monitor 17, wherein the liquid level meter 15 and the temperature monitor 17 are respectively arranged on the side wall of the lower part of the absorption cycle liquid storage tank 1, and the pressure gauge 16 is arranged on the outer wall of the top of the absorption cycle liquid storage tank 1.
As a further embodiment, a flow monitor 18 is further included, and the flow monitor 18 is provided on the absorption liquid circulating pump outlet line 12 connected to the tube-side inlet of the absorption liquid cooler 11.
As a further embodiment, a desalted water adding valve 19 and a check valve 20 are further included, and the desalted water adding valve 19 and the check valve 20 are respectively arranged on the desalted water adding line 5 of the absorption cycle liquid storage tank.
As a further embodiment, the device further comprises a dilute acid delivery line 21 and a dilute acid delivery valve 22, wherein the dilute acid delivery line 21 is arranged on the outlet pipeline 12 of the absorption liquid circulating pump after the other end of the return pipeline 6 of the absorption circulating liquid storage tank is in intersection connection with the outlet pipeline 12 of the absorption liquid circulating pump, and the dilute acid delivery valve 22 is arranged on the dilute acid delivery line 21.
As a further embodiment, a return valve 23 is further included, and the return valve 23 is provided on the return line 6 of the absorption cycle liquid storage tank.
The utility model discloses at the during operation, open desalinized water valve 19 earlier and make 1 liquid level in absorption cycle liquid storage tank keep about 50%, open absorption liquid circulating pump 8, dilute acid in the absorption cycle liquid storage tank 1 steps up to 0.6MPa, flow 20m manhour, send to absorption sprayer 9 liquid phase import after absorption liquid cooler 11 cools off to about 47 ℃, thereby make and absorb and form the vacuum in the sprayer 9, the gas phase import that will contain nitrous gas inhales absorption sprayer 9 in through absorbing sprayer 9 gas phase import, along with absorbing sprayer 9, get into absorption cycle liquid storage tank 1 lower part through circulation liquid outlet pipeline 10, so constantly circulate, absorb, dilute acid concentration constantly increases in the absorption cycle liquid storage tank 1, when concentration reaches 20%, open dilute acid outward send pipeline 21 to system's acid accumulator, send dilute acid outward and lead to the interior liquid level decline of absorption cycle liquid storage tank 1, open the valve in time to replenish the desalinized water, guarantee the absorption liquid volume.
The utility model discloses flow monitor 18, diluted acid on 16, the absorption liquid circulating pump outlet line 12 of manometer of well absorption cycle liquid storage tank 1, absorption liquid circulating pump export pipeline 22, desalinized water valve 19, check valve 20 are prior art product and need not further be elaborated on in detail.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (8)
1. The utility model provides a purge gas recovery system for containing nitrous gas, includes absorption circulation liquid storage tank, purge gas inlet line, absorption circulation liquid storage tank diluted acid outlet pipeline and absorption circulation liquid storage tank blowdown pipeline, purge gas inlet line is linked together with absorption circulation liquid storage tank, absorption circulation liquid storage tank blowdown pipeline is linked together with absorption circulation liquid storage tank top, absorption circulation liquid storage tank diluted acid outlet pipeline one end is linked together with absorption circulation liquid storage tank bottom, its characterized in that still includes absorption circulation liquid storage tank desalted water filling pipeline, absorption circulation liquid storage tank return line, circulation liquid inlet pipeline and absorption liquid circulating pump, absorption circulation liquid storage tank desalted water filling pipeline is linked together with absorption circulation liquid storage tank middle part, the middle and lower part of absorption circulation liquid storage tank is linked together with absorption circulation liquid return line one end, absorption liquid circulating pump import links to each other with absorption circulation liquid storage tank diluted acid outlet pipeline, and absorption circulation liquid storage tank return line other end and circulation liquid inlet pipeline one end are linked together respectively to the absorption circulation liquid storage tank return line other end, and the circulation liquid inlet pipeline other end is linked together with absorption circulation liquid storage tank.
2. A purge gas recovery system for nitrous gases as claimed in claim 1, further comprising an absorption eductor and a recycle liquid outlet line, wherein a lower end of said recycle liquid outlet line extends into a lower portion of the interior of the absorption recycle liquid tank through a top portion of the absorption recycle liquid tank, a liquid phase outlet of said absorption eductor is connected to an upper end of the recycle liquid outlet line, a gas phase inlet of the absorption eductor is connected to the purge gas inlet line, and a liquid phase inlet of the absorption eductor is connected to the other end of the recycle liquid inlet line.
3. The system for recycling purge gas containing nitrous gases as claimed in claim 1, further comprising an absorption liquid cooler, wherein said absorption liquid cooler has a tube pass inlet connected to an upper end of an outlet pipeline of the absorption liquid circulating pump, an outlet of the tube pass of the absorption liquid cooler is connected to an inlet pipeline of the circulating pump, a lower end of the outlet pipeline of the absorption liquid circulating pump is connected to an outlet of the absorption liquid circulating pump, another end of a return pipeline of the absorption circulating liquid storage tank is connected to an outlet pipeline of the absorption liquid circulating pump, and a shell pass inlet of the absorption liquid cooler and a shell pass outlet of the absorption liquid cooler are connected to a circulating water inlet pipeline and a circulating water outlet pipeline, respectively.
4. A purge gas recovery system for nitrous gases as claimed in claim 1, further comprising a level gauge, a pressure gauge and a temperature monitor, wherein said level gauge and said temperature monitor are respectively disposed on a lower side wall of said absorption cycle liquid storage tank, and said pressure gauge is disposed on an outer wall of a top portion of said absorption cycle liquid storage tank.
5. A purge gas recovery system for nitrous gases according to claim 3, further comprising a flow monitor, said flow monitor being disposed in an absorbent liquid circulating pump outlet line connected to the inlet of the absorbent liquid cooler tube side.
6. A purge gas recovery system for nitrous gases as claimed in claim 1, further comprising a valve for adding desalinated water and a check valve, said valve for adding desalinated water and check valve being respectively disposed on the pipeline for adding desalinated water to the absorption cycle liquid storage tank.
7. A purge gas recovery system for nitrous gases according to claim 3, further comprising a dilute acid delivery line and a dilute acid delivery valve, wherein the dilute acid delivery line is disposed on an outlet line of the absorption liquid circulating pump after the other end of the return line of the absorption circulating liquid storage tank is connected to the outlet line of the absorption liquid circulating pump in a crossing manner, and the dilute acid delivery valve is disposed on the dilute acid delivery line.
8. A purge gas recovery system for nitrous gases as claimed in claim 1 further comprising a return valve, said return valve being disposed in a return line of the absorption cycle liquid tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221659478.1U CN218290448U (en) | 2022-06-30 | 2022-06-30 | Purge gas recovery system for nitrous gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221659478.1U CN218290448U (en) | 2022-06-30 | 2022-06-30 | Purge gas recovery system for nitrous gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218290448U true CN218290448U (en) | 2023-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221659478.1U Active CN218290448U (en) | 2022-06-30 | 2022-06-30 | Purge gas recovery system for nitrous gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218290448U (en) |
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2022
- 2022-06-30 CN CN202221659478.1U patent/CN218290448U/en active Active
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