CN219272644U - Nitrogen oxide under-pressure absorbing device - Google Patents
Nitrogen oxide under-pressure absorbing device Download PDFInfo
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- CN219272644U CN219272644U CN202223612682.0U CN202223612682U CN219272644U CN 219272644 U CN219272644 U CN 219272644U CN 202223612682 U CN202223612682 U CN 202223612682U CN 219272644 U CN219272644 U CN 219272644U
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- absorption tower
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model belongs to the technical field of waste gas treatment equipment, and particularly relates to a nitrogen oxide pressurized absorption device which comprises an oxidation tower, a primary absorption tower, a secondary absorption tower, a tertiary absorption tower, an alkaline washing tower, a circulating dilute nitric acid tank and a dilute nitric acid storage tank, wherein an air inlet at one side of the oxidation tower is provided with an air blower, a cooler, a knockout and a compressor are arranged between the oxidation tower and the primary absorption tower, an exhaust port of the oxidation tower is communicated with an air inlet port of the cooler through a pipeline, and an output port of the cooler is communicated with an input port of the knockout through a pipeline. According to the utility model, through the oxidation tower, the primary absorption tower, the secondary absorption tower, the tertiary absorption tower, the alkaline washing tower, the circulating dilute nitric acid tank and the dilute nitric acid storage tank, nitrogen oxides can be fully absorbed, the nitric acid recovery rate is improved, the amount of waste brine is reduced, the labor intensity of workers can be reduced, and the problems of incomplete nitrogen oxide absorption and low nitric acid recovery rate in the current stage are solved.
Description
Technical Field
The utility model relates to the technical field of waste gas treatment equipment, in particular to a nitrogen oxide pressurized absorption device.
Background
Nitrogen oxides mainly comprising nitric oxide and nitrogen dioxide are an important reason for forming photochemical smog and acid rain, and the nitrogen oxides in automobile exhaust react with hydrocarbon to form toxic smog through ultraviolet irradiation, namely photochemical smog, which has special smell, stimulates eyes, hurts plants, reduces the atmospheric visibility, causes pollution to the environment and has great social hazard, so that the nitrogen oxide exhaust is necessary to be treated.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the utility model provides the nitrogen oxide absorber with pressure, which can fully absorb nitrogen oxides, improve the recovery rate of nitric acid, reduce the amount of waste brine, reduce the labor intensity of staff and solve the problems of incomplete nitrogen oxide absorption and low recovery rate of nitric acid in the prior art through an oxidation tower, a primary absorption tower, a secondary absorption tower, a tertiary absorption tower, an alkaline washing tower, a circulating dilute nitric acid tank and a dilute nitric acid storage tank.
(II) technical scheme
The utility model adopts the following technical scheme for realizing the purposes:
the nitrogen oxide absorption device under pressure comprises an oxidation tower, a first-stage absorption tower, a second-stage absorption tower, a third-stage absorption tower, an alkaline washing tower, a circulating dilute nitric acid tank and a dilute nitric acid storage tank, wherein an air blower is arranged at an air inlet at one side of the oxidation tower, a cooler, a liquid separator and a compressor are arranged between the oxidation tower and the first-stage absorption tower, an exhaust port of the oxidation tower is communicated with an air inlet port of the cooler through a pipeline, an output port of the cooler is communicated with an input port of the liquid separator through a pipeline, an output port of the liquid separator is communicated with an input port of the compressor, and the compressor is arranged at an air inlet port of the first-stage absorption tower.
Further, the primary absorption tower is communicated with the secondary absorption tower through a pipeline, the secondary absorption tower is communicated with the tertiary absorption tower through a pipeline, cooling water inlets and cooling water outlets are formed in the primary absorption tower, the secondary absorption tower and the tertiary absorption tower, and valves and pure water pumps are arranged at the cooling water inlets and the cooling water outlets of the primary absorption tower, the secondary absorption tower and the tertiary absorption tower.
Further, the exhaust port of the three-stage absorption tower is communicated with the air inlet port of the alkaline washing tower through a pipeline.
Further, the liquid discharge port of the primary absorption tower is communicated with the circulating dilute nitric acid tank through a pipeline, and the liquid discharge port of the circulating dilute nitric acid tank is communicated with the dilute nitric acid storage tank through a pipeline.
Further, the liquid discharge port of the circulating dilute nitric acid tank is respectively communicated with the primary absorption tower, the secondary absorption tower and the tertiary absorption tower through pipelines.
(III) beneficial effects
Compared with the prior art, the nitrogen oxide under-pressure absorption device provided by the utility model has the following beneficial effects:
according to the utility model, through arranging the oxidation tower, the first-stage absorption tower, the second-stage absorption tower, the third-stage absorption tower, the alkaline washing tower, the circulating dilute nitric acid tank and the dilute nitric acid storage tank, during operation, the nitrogen oxide tail gas and air are mixed and oxidized in the oxidation tower, oxidized gas enters the compressor to be compressed to about 1.2MPa after being cooled and separated, and sequentially enters the three absorption towers to be absorbed by water and dilute nitric acid to generate dilute nitric acid with the concentration of about 50%, wherein the final tail gas is decompressed by the third-stage absorption tower and then is discharged after the alkaline washing tower is alkaline washed and reaches the standard, so that the nitrogen oxide treatment is realized.
Drawings
FIG. 1 is a schematic illustration of the process flow of the present utility model.
In the figure: 1. an air blower; 2. an oxidation tower; 3. a cooler; 4. a knockout; 5. a compressor; 6. a first-stage absorption tower; 7. a secondary absorption tower; 8. a three-stage absorption tower; 9. an alkaline washing tower; 10. circulating a dilute nitric acid tank; 11. a dilute nitric acid storage tank.
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.
Examples
As shown in fig. 1, the nitrogen oxide absorber with pressure provided by one embodiment of the utility model comprises an oxidation tower 2, a first-stage absorption tower 6, a second-stage absorption tower 7, a third-stage absorption tower 8, an alkaline washing tower 9, a circulating dilute nitric acid tank 10 and a dilute nitric acid storage tank 11, wherein an air blower 1 is arranged at an air inlet at one side of the oxidation tower 2, the air blower 1 can discharge outside air and nitrogen oxide tail gas into the oxidation tower 2, an air mixture and nitrogen oxide are oxidized in the oxidation tower 2, a cooler 3, a knockout drum 4 and a compressor 5 are arranged between the oxidation tower 2 and the first-stage absorption tower 6, the cooling of gas after oxidation can be realized by the cooler 3, an exhaust port of the oxidation tower 2 is communicated with an air inlet port of the cooler 3 through a pipeline, an output port of the cooler 3 is communicated with an input port of the knockout drum 4, the knockout drum 4 can perform gas-liquid separation, an output port of the knockout drum 4 is communicated with an input port of the compressor 5 through a pipeline, the compression of discharged gas can be realized, the compressor 5 is arranged at an air inlet port of the first-stage absorption tower 6, and then the compressed gas is discharged into the absorption tower 6 for processing.
As shown in fig. 1, in some embodiments, the primary absorption tower 6 is communicated with the secondary absorption tower 7 through a pipeline, the secondary absorption tower 7 is communicated with the tertiary absorption tower 8 through a pipeline, the gas circulation treatment can be performed, cooling water inlets and cooling water outlets are formed in the primary absorption tower 6, the secondary absorption tower 7 and the tertiary absorption tower 8, pure water can be added into the primary absorption tower 6, the secondary absorption tower 7 and the tertiary absorption tower 8, valves and pure water pumps are mounted at the cooling water inlets and the cooling water outlets of the primary absorption tower 6, the secondary absorption tower 7 and the tertiary absorption tower 8, the pure water inlet and the pure water outlet are controlled, and the mode can be matched with nitric acid to realize the gas absorption treatment.
As shown in fig. 1, in some embodiments, the exhaust port of the three-stage absorption tower 8 is communicated with the air inlet port of the alkaline washing tower 9 through a pipeline, so that the gas after the absorption treatment can be discharged into the alkaline washing tower 9 for alkaline washing of the gas, and the gas can be discharged after reaching the qualified standard, thereby increasing the treatment effect.
As shown in fig. 1, in some embodiments, the liquid discharge port of the primary absorption tower 6 is communicated with the circulating dilute nitric acid tank 10 through a pipeline, and the liquid discharge port of the circulating dilute nitric acid tank 10 is communicated with the dilute nitric acid tank 11 through a pipeline; the mode can realize recycling of nitric acid and avoid unnecessary waste.
As shown in fig. 1, in some embodiments, the liquid discharge ports of the circulating dilute nitric acid tank 10 are respectively communicated with the primary absorption tower 6, the secondary absorption tower 7 and the tertiary absorption tower 8 through pipelines; nitric acid can be discharged into the first-stage absorption tower 6, the second-stage absorption tower 7 and the third-stage absorption tower 8 through pipelines, so that gas is pickled, and waste gas is absorbed.
Process parameters
| Sequence number | Name of the name | |
| 1 | Compressor outlet pressure | 1.15MPa～1.25 |
| 2 | Cooler outlet temperature | 25±2℃ |
| 3 | Recovery of nitric acid concentration | 50％±2％ |
| 4 | Absorption tower temperature | 30～70℃ |
| 5 | Pressure of absorption tower | 0.9MPa～1.2MPa |
The application method comprises the following steps:
s1, setting and putting an interlock;
s2, placing liquid alkali into the alkaline washing tower 9 until the liquid level is 30%, discharging the liquid alkali and industrial water into a wastewater pool when the pH is less than 8 and the processing industry water reaches 70%;
s3, starting a pure water pump filling level, pumping pure water into the secondary absorption tower 7 when the liquid level of the tertiary absorption tower 8 reaches 30%, pumping pure water into the primary absorption tower 6 when the liquid level of the secondary absorption tower 7 reaches 30%, and closing the pure water pump when the liquid level of the primary absorption tower 6 reaches 30%;
s4, starting an air blower 1 at one side of the oxidation tower 2, introducing outside air and nitrogen oxide tail gas into the oxidation tower 2 for oxidation treatment, starting a compressor 5, and starting valves on cooling water inlets and outlets of the primary absorption tower 6, the secondary absorption tower 7 and the tertiary absorption tower 8 after the operation of the compressor 5 is stable;
s5, when the nitrogen oxides enter the oxidation tower 2, pure water is started, so that pure water is ensured to exist in the primary absorption tower 6, the secondary absorption tower 7 and the tertiary absorption tower 8;
s6, when the dilute nitric acid in the circulating dilute nitric acid tank 10 enters three absorption towers, the pure water quantity is adjusted according to the absorption condition of nitrogen oxides, and the pure water quantity is reduced on the premise that the tail gas reaches the standard, so that the acid concentration required by recycling the dilute nitric acid is achieved;
s7, pumping the qualified recovered dilute nitric acid into a dilute nitric acid storage tank 11.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (5)
1. Nitrogen oxide area presses absorbing device, its characterized in that: including oxidation tower (2), one-level absorption tower (6), second grade absorption tower (7), tertiary absorption tower (8), caustic wash tower (9), circulation dilute nitric acid groove (10) and dilute nitric acid storage tank (11), air blower (1) are installed to the air inlet of oxidation tower (2) one side to be provided with cooler (3), knockout (4) and compressor (5) between oxidation tower (2) and one-level absorption tower (6), the exhaust port of oxidation tower (2) passes through the inlet port intercommunication of pipeline and cooler (3), and the output port of cooler (3) passes through the inlet port intercommunication of pipeline and knockout (4), and the inlet port department at one-level absorption tower (6) is installed in compressor (5).
2. The nitrogen oxide pressure absorption device according to claim 1, wherein: the primary absorption tower (6) is communicated with the secondary absorption tower (7) through a pipeline, the secondary absorption tower (7) is communicated with the tertiary absorption tower (8) through a pipeline, and a cooling water inlet and a cooling water outlet are formed in the primary absorption tower (6), the secondary absorption tower (7) and the tertiary absorption tower (8), and a valve and a pure water pump are arranged at the cooling water inlet and the cooling water outlet of the primary absorption tower (6), the secondary absorption tower (7) and the tertiary absorption tower (8).
3. The nitrogen oxide pressure absorption device according to claim 1, wherein: the exhaust port of the three-stage absorption tower (8) is communicated with the air inlet port of the alkaline washing tower (9) through a pipeline.
4. The nitrogen oxide pressure absorption device according to claim 1, wherein: the liquid discharge port of the primary absorption tower (6) is communicated with the circulating dilute nitric acid tank (10) through a pipeline, and the liquid discharge port of the circulating dilute nitric acid tank (10) is communicated with the dilute nitric acid storage tank (11) through a pipeline.
5. The nitrogen oxide pressure absorption device according to claim 1, wherein: the liquid discharge port of the circulating dilute nitric acid tank (10) is respectively communicated with the primary absorption tower (6), the secondary absorption tower (7) and the tertiary absorption tower (8) through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223612682.0U CN219272644U (en) | 2022-12-30 | 2022-12-30 | Nitrogen oxide under-pressure absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223612682.0U CN219272644U (en) | 2022-12-30 | 2022-12-30 | Nitrogen oxide under-pressure absorbing device |
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| Publication Number | Publication Date |
|---|---|
| CN219272644U true CN219272644U (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223612682.0U Active CN219272644U (en) | 2022-12-30 | 2022-12-30 | Nitrogen oxide under-pressure absorbing device |
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| Country | Link |
|---|---|
| CN (1) | CN219272644U (en) |
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- 2022-12-30 CN CN202223612682.0U patent/CN219272644U/en active Active
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