CN219502390U - Concentrated nitric acid tail gas recovery device - Google Patents
Concentrated nitric acid tail gas recovery device Download PDFInfo
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- CN219502390U CN219502390U CN202320662314.2U CN202320662314U CN219502390U CN 219502390 U CN219502390 U CN 219502390U CN 202320662314 U CN202320662314 U CN 202320662314U CN 219502390 U CN219502390 U CN 219502390U
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- nitric acid
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- water
- concentrated nitric
- separator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The utility model belongs to the technical field of concentrated nitric acid tail gas recovery, and particularly relates to a concentrated nitric acid tail gas recovery device. The concentrated nitric acid tail gas recovery device comprises: the device comprises a separator (1), wherein the separator (1) is connected with a tower tail water circulation tank (2), the separator (1) is connected with a separation water seal tank (3), the tower tail water circulation tank (2) is connected with a circulation water seal tank (4), the separation water seal tank (3) is connected with a water supply pipe network (11), and the circulation water seal tank (4) is connected with the water supply pipe network (11); the tower tail water circulation tank (2) is connected with the concentrated nitric acid cooler (8); the tower tail water circulation tank (2) is connected with the dilute nitric acid low-pressure reaction water cooler (9), and a compressor (5) is arranged between the tower tail water circulation tank (2) and the dilute nitric acid low-pressure reaction water cooler (9). The concentrated nitric acid tail gas recovery device provided by the utility model is energy-saving, consumption-reducing and emission of nitrogen oxides is reduced.
Description
Technical Field
The utility model belongs to the technical field of concentrated nitric acid tail gas recovery, and particularly relates to a concentrated nitric acid tail gas recovery device.
Background
Nitric acid has strong oxidizing property and strong acidity, and is often applied to organic chemistry and used as a nitrifying reagent. At present, nitrogen oxide tail gas of each acid tank of a concentrated nitric acid device is pumped to a tail gas absorption tank in vacuum before the process is implemented, and is subjected to unstructured emission after being absorbed by water, so that the environment is affected, and resource waste is caused. Although the existing treatment schemes for nitric acid tail gas are more, most of the treatment schemes are complex in treatment system, and the single equipment is improved, so that the recovery effect is difficult to achieve.
CN211537191U discloses a concentrated nitric acid tail gas recovery device, which comprises a first absorption part, wherein the first absorption part comprises a first absorption tower and a first storage tank, the outer side of the bottom of the first absorption tower is connected with a first air inlet pipe, the outer side of the top of the first absorption tower is connected with a first air outlet pipe, and a first spray system is arranged in the first absorption tower; the first storage tank is connected with the first spraying system through a first return pipe, and a first return pump is arranged between the first return pipe and the first storage tank; the bottom of the first absorption tower is connected with the top of the first storage tank through a first liquid outlet pipe. The tail gas generated in the production process of the concentrated nitric acid can be recovered to generate nitrate, and the discharged tail gas does not contain toxic components.
CN203678227U discloses a tail gas treatment system for concentrated nitric acid production, which comprises a dilute nitric acid intermediate tank, a tower tail water tank, a magnesium tail water tank, a concentrated magnesium nitrate storage tank, a dilute magnesium nitrate storage tank, a vent separation pipe, a vent main pipe, an acid water pump, a magnesium tail water pump, a primary vacuum ejector and a secondary vacuum ejector. The two vacuum ejectors are arranged on the magnesium tail water tank, the negative pressure suction ports of the vacuum ejectors are connected with the emptying main pipe, so that the emptying main pipe is always kept in a negative pressure state, discharged gas is sucked into the magnesium tail water tank, and the magnesium tail water in the magnesium tail water tank is circulated through the acid water pump and the magnesium tail water pump to absorb NOX in the gas, so that the environment pollution is avoided, nitric acid produced by NOX is recovered, and the magnesium tail water tank has good environmental benefit and economic benefit.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a concentrated nitric acid tail gas recovery device which is energy-saving, consumption-reducing and emission of nitrogen oxides.
The utility model is realized by adopting the following technical scheme:
the concentrated nitric acid tail gas recovery device comprises: the device comprises a separator, wherein the separator is connected with a tower tail water circulation tank, the separator is connected with a separation water seal tank, the tower tail water circulation tank is connected with a circulation water seal tank, the separation water seal tank is connected with a water supply network, and the circulation water seal tank is connected with the water supply network;
the tower tail water circulation tank is connected with the concentrated nitric acid cooler;
the tower tail water circulation tank is connected with the dilute nitric acid low-pressure reaction water cooler, and a compressor is arranged between the tower tail water circulation tank and the dilute nitric acid low-pressure reaction water cooler. The dilute nitric acid low-pressure reaction water cooler is 10 ten thousand tons of dilute nitric acid, and the compressor automatically stops after receiving a 10 ten thousand tons of dilute nitric acid stop signal.
Preferably, the separator is connected to a raw gas absorption system.
Preferably, the separator is connected to a loading pipeline.
Preferably, the separator is connected with the concentrated nitric acid tank; the separator is connected with the dilute nitric acid tank; the separator is connected with the mixed acid tank.
Preferably, a waste water pipe is arranged on the tower tail water circulation tank, and a circulation pump is arranged on the waste water pipe for connection.
Preferably, the tower tail water circulation tank is connected with the concentrated nitric acid cooler and the dilute nitric acid low-pressure reaction water cooler through compressors respectively.
The utility model discloses a concentrated nitric acid tail gas recovery device, which is characterized in that tail gas from a concentrated nitric acid tank, a dilute nitric acid tank, a mixed acid tank and a loading pipeline enters a separator, separated gas continuously enters a tower tail water circulation tank, a separation water seal tank and a circulating water seal tank are respectively arranged on the separator and the tower tail water circulation tank, the treated gas enters a dilute nitric acid low-pressure reaction water cooler, and the gas is compressed by a compressor and then is sent to a dilute nitric acid production system for recovery.
The beneficial effects of the utility model are as follows:
the concentrated nitric acid tail gas recovery device provided by the utility model saves water after the tail gas absorption tank is removed, does not generate nitrogen oxides any more, reduces the emission of the nitrogen oxides, generates good environmental benefits, improves the automation level, and reduces the occurrence of production accidents.
Drawings
FIG. 1 is a schematic diagram of a concentrated nitric acid tail gas recovery apparatus of the present utility model;
in the figure: 1. a separator; 2. a tower tail water circulation tank; 3. separating a water seal groove; 4. a circulating water seal tank; 5. a compressor; 6. a circulation pump; 7. a waste pipe; 8. concentrated nitric acid cooler; 9. a dilute nitric acid low-pressure reaction water cooler; 10. a raw gas absorption system; 11. a water supply network; 12. a loading pipeline; 13. a concentrated nitric acid tank; 14. a dilute nitric acid tank; 15. and a mixed acid tank.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1, the concentrated nitric acid tail gas recovery device of the utility model comprises: the device comprises a separator 1, wherein the separator 1 is connected with a tower tail water circulation tank 2, the separator 1 is connected with a separation water seal tank 3, the tower tail water circulation tank 2 is connected with a circulation water seal tank 4, the separation water seal tank 3 is connected with a water supply pipe network 11, and the circulation water seal tank 4 is connected with the water supply pipe network 11;
the tower tail water circulation tank 2 is connected with a concentrated nitric acid cooler 8;
the tower tail water circulation tank 2 is connected with the dilute nitric acid low-pressure reaction water cooler 9, and a compressor 5 is arranged between the tower tail water circulation tank 2 and the dilute nitric acid low-pressure reaction water cooler 9. The dilute nitric acid low-pressure reaction water cooler 9 is 10 ten thousand tons of dilute nitric acid, and the compressor 5 is automatically stopped after receiving a 10 ten thousand tons of dilute nitric acid stop signal.
The separator 1 is connected to a raw gas absorbing system 10.
The separator 1 is connected with a loading pipeline 12.
The separator 1 is connected with a concentrated nitric acid tank 13; the separator 1 is connected with a dilute nitric acid tank 14; the separator 1 is connected with a mixed acid tank 15.
The tower tail water circulation tank 2 is provided with a waste water pipe 7, and the waste water pipe 7 is provided with a circulation pump 6 for connection.
The tower tail water circulation tank 2 is respectively connected with a concentrated nitric acid cooler 8 and a dilute nitric acid low-pressure reaction water cooler 9 through a compressor 5.
In the concentrated nitric acid tail gas recovery device, tail gas from a concentrated nitric acid tank 13, a dilute nitric acid tank 14, a mixed acid tank 15 and a loading pipeline 12 enters a separator 1, separated gas continuously enters a tower tail water circulation tank 2, a separation water seal tank 3 and a circulating water seal tank 4 are respectively arranged on the separator 1 and the tower tail water circulation tank 2, and the treated gas enters a dilute nitric acid low-pressure reaction water cooler 9, is compressed by a compressor 5 and is sent to a dilute nitric acid production system for recovery.
After the tail gas absorption tank is removed, the water consumption is saved by 500m 3 And/a, the cost is saved by 1 ten thousand yuan/a (calculated according to a 10 ten thousand ton concentrated nitric acid device). The production link does not generate nitrogen oxides any more, and the emission of the nitrogen oxides is reduced by 0.02t each year, so that good environmental benefit is generated.
Of course, the foregoing is merely preferred embodiments of the present utility model and is not to be construed as limiting the scope of the embodiments of the present utility model. The present utility model is not limited to the above examples, and those skilled in the art will appreciate that the present utility model is capable of equally varying and improving within the spirit and scope of the present utility model.
Claims (6)
1. The utility model provides a concentrated nitric acid tail gas recovery unit which characterized in that: the device comprises a separator (1), wherein the separator (1) is connected with a tower tail water circulation tank (2), the separator (1) is connected with a separation water seal tank (3), the tower tail water circulation tank (2) is connected with a circulation water seal tank (4), the separation water seal tank (3) is connected with a water supply pipe network (11), and the circulation water seal tank (4) is connected with the water supply pipe network (11);
the tower tail water circulation tank (2) is connected with the concentrated nitric acid cooler (8);
the tower tail water circulation tank (2) is connected with the dilute nitric acid low-pressure reaction water cooler (9), and a compressor (5) is arranged between the tower tail water circulation tank (2) and the dilute nitric acid low-pressure reaction water cooler (9).
2. The concentrated nitric acid tail gas recovery device according to claim 1, wherein: the separator (1) is connected with a raw gas absorption system (10).
3. The concentrated nitric acid tail gas recovery device according to claim 1, wherein: the separator (1) is connected with a loading pipeline (12).
4. The concentrated nitric acid tail gas recovery device according to claim 1, wherein: the separator (1) is connected with the concentrated nitric acid tank (13); the separator (1) is connected with the dilute nitric acid tank (14); the separator (1) is connected with the mixed acid tank (15).
5. The concentrated nitric acid tail gas recovery device according to claim 1, wherein: the tower tail water circulation tank (2) is provided with a waste water pipe (7), and the waste water pipe (7) is provided with a circulation pump (6) for connection.
6. The concentrated nitric acid tail gas recovery device according to claim 1, wherein: the tower tail water circulation tank (2) is connected with a concentrated nitric acid cooler (8) and a dilute nitric acid low-pressure reaction water cooler (9) through a compressor (5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320662314.2U CN219502390U (en) | 2023-03-27 | 2023-03-27 | Concentrated nitric acid tail gas recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320662314.2U CN219502390U (en) | 2023-03-27 | 2023-03-27 | Concentrated nitric acid tail gas recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219502390U true CN219502390U (en) | 2023-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320662314.2U Active CN219502390U (en) | 2023-03-27 | 2023-03-27 | Concentrated nitric acid tail gas recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219502390U (en) |
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2023
- 2023-03-27 CN CN202320662314.2U patent/CN219502390U/en active Active
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