CN216537715U - Nitrogen oxide tail gas degassing device - Google Patents
Nitrogen oxide tail gas degassing device Download PDFInfo
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- CN216537715U CN216537715U CN202122900250.9U CN202122900250U CN216537715U CN 216537715 U CN216537715 U CN 216537715U CN 202122900250 U CN202122900250 U CN 202122900250U CN 216537715 U CN216537715 U CN 216537715U
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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
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Abstract
The utility model discloses a nitrogen oxide tail gas degassing device, wherein the top of a degassing tower is connected with a gas inlet of a tower kettle of a first tail gas absorption tower through a first conveying pump, a gas outlet at the top of the first tail gas absorption tower is connected with a gas inlet of a tower kettle of a second tail gas absorption tower through a second conveying pump, a gas outlet at the top of the second tail gas absorption tower is connected with a gas inlet of a Roots blower through a third conveying pump, and a gas outlet of the Roots blower is connected with a gas inlet of a third tail gas absorption tower. And a gas outlet at the top of the second tail gas absorption tower is also connected with a gas inlet at the middle part of the gas-liquid separator through a third conveying pump, and a gas outlet at the top of the gas-liquid separator is connected with a gas inlet of the Roots blower. Leading to in the degasser nitrogen gas when exploding gas and utilizing the fan to take out degasser top of the tower tail gas for degasser tail gas absorbs and forms the slight negative pressure, and nitrogen oxide, nitrogen gas among the degasser tail gas can be more smooth the circulation and get into the absorption tower and absorb, thereby tail gas gets into the absorption tower and carries out multistage absorption recovery nitrogen oxide and make nitric acid or nitrate liquid.
Description
Technical Field
The utility model belongs to the field of energy conservation and consumption reduction, and particularly relates to a device for removing nitrogen oxides or other insoluble gases blown out of a solution by using micro-negative pressure, which can reduce the acid value of a crude product, reduce the generation of byproducts, and improve the yield and the quality.
Background
The degassing capacity of the degassing tower is poor, a large amount of nitrogen oxide is dissolved in dimethyl sulfoxide and is brought to the next process (neutralization process), so that a large amount of liquid alkali is required to be added in the neutralization process to consume the nitrogen oxide for neutralization regulation, and finally a large amount of sulfone salt is generated, wherein firstly, the consumption and energy sources are increased in the production control process, and secondly, the generated sulfone salt has large post-treatment burden and is uneconomical.
Disclosure of Invention
The utility model provides a nitrogen oxide tail gas degassing device, which is characterized in that nitrogen is introduced into a degassing tower to be subjected to aeration, and simultaneously a fan is used for pumping out tail gas at the top of the degassing tower, so that the tail gas of the degassing tower is absorbed to form micro negative pressure, and nitrogen oxide and nitrogen in the degassed tail gas can smoothly circulate and enter an absorption tower to be absorbed. The method can increase the capability of the degassing tower for removing nitrogen oxide, greatly reduce the acid value of the degassing tower, reduce the alkali consumption of the neutralization tower, reduce the generation of sulfone salt and improve the yield.
The utility model provides a nitrogen oxide tail gas degassing unit, the degasser top of the tower is connected through first delivery pump and first tail gas absorption tower cauldron air inlet, and first tail gas absorption tower top gas outlet is connected through second delivery pump and second tail gas absorption tower cauldron air inlet, and second tail gas absorption tower top gas outlet is connected with roots's fan air inlet through the third delivery pump, and roots's fan gas outlet is connected with third tail gas absorption tower air inlet.
The degassing tower is provided with a nitrogen supplementing pipe.
And a gas outlet at the top of the second tail gas absorption tower is also connected with a gas inlet at the middle part of the gas-liquid separator through a third conveying pump, and a gas outlet at the top of the gas-liquid separator is connected with a gas inlet of the Roots blower.
The method of the utility model is that under the condition of constant feeding quantity of the degassing tower and constant nitrogen feeding, a tail gas fan is added at the outlet of the tail gas absorption tower, the fan continuously pumps tail gas to enable the inlet of the fan, namely the degassing tower and the corresponding tail gas absorption tower to form negative pressure, the negative pressure is controlled within 10kpa, and nitrogen oxide and nitrogen continuously enter the next stage of absorption after being pressurized by the fan under the negative pressure condition.
Nitrogen is blown to remove nitrogen oxide under a micro-negative pressure system, so that the nitrogen oxide can escape from a solution more easily and enter a tail gas system, and the method for improving the degassing capacity comprises the following technical processes:
under the unchangeable condition of degasser feed volume, nitrogen gas throw the material, increase a tail gas fan at the export of tail gas absorption tower, constantly take out tail gas through the fan and make the fan import promptly degasser tower and its tail gas absorption tower that corresponds form the negative pressure, the negative pressure control is within 10kpa, nitrogen oxide and nitrogen gas enter next grade absorption after the fan pressurization under the negative pressure condition.
The acid value of the crude sulfoxide after the nitrogen oxide is removed by the degassing tower is reduced, so that the yield is improved, and the consumption is reduced. When the tail gas fan operates normally, the operation frequency is adjusted and the bypass valve is controlled, so that the pressure of the gas-liquid separation tank at the inlet of the fan and the pressure of the degassing tower are always kept under the condition of micro negative pressure, and the capability of the degassing tower for removing nitrogen oxide is improved; in addition, the tail gas fan is provided with a bypass valve, so that the inlet pressure of the fan can be controlled, the overpressure condition of the degassing tower can be prevented, when the tail gas fan breaks down or stops running, part of tail gas can enter the next stage from the bypass passage to be absorbed, the bypass valve is fully opened before the fan is started, and the fluctuation of the pressure of the whole tail gas system for oxidation can be reduced by slowly adjusting the bypass valve after the fan runs normally.
Drawings
FIG. 1 is a simplified block diagram of the apparatus employed in the process of the present invention.
1. The system comprises a degassing tower, 2, a first tail gas absorption tower, 3, a second tail gas absorption tower, 4, a gas-liquid separator, 5, a third tail gas absorption tower, 6-1, a first delivery pump, 6-2, a second delivery pump, 6-3, a third delivery pump, 6-4, a Roots blower and 7, a nitrogen supplementing pipe.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
example 1: a nitrogen oxide tail gas degassing device is characterized in that a tower top of a degassing tower 1 is connected with a tower kettle air inlet of a first tail gas absorption tower 2 through a first conveying pump 6-1, a tower top air outlet of the first tail gas absorption tower 2 is connected with a tower kettle air inlet of a second tail gas absorption tower 3 through a second conveying pump 6-2, a tower top air outlet of the second tail gas absorption tower 3 is connected with a gas inlet of a Roots blower 6-4 through a third conveying pump 6-3, and a gas outlet of the Roots blower 6-4 is connected with a gas inlet of a third tail gas absorption tower 5.
The degassing column 1 is provided with a nitrogen-supplementing pipe 7.
The gas outlet at the top of the second tail gas absorption tower 3 is also connected with the gas inlet at the middle part of the gas-liquid separator 4 through a third delivery pump 6-3, and the gas outlet at the top of the gas-liquid separator 4 is connected with the gas inlet of the Roots blower 6-4. The Roots blower 6-4 is provided with a bypass valve, so that the tail gas absorbed by the degassing tower 1 is absorbed by the first tail gas absorption tower and then enters the second tail gas absorption tower for absorption, and the absorbed tail gas directly enters the third tail gas absorption tower. And the Roots blower 6-4 is also provided with an inlet and outlet valve.
When the fan is not put into operation: fully opening a Roots blower bypass valve, and closing an inlet valve and an outlet valve of the blower; the tail gas absorbed by the degassing tower 1 is absorbed by the first tail gas absorption tower and then enters the second tail gas absorption tower for absorption, and the absorbed tail gas directly enters the third tail gas absorption tower for absorption.
When the fan is put into use: the method comprises the following steps of (1) fully opening a fan bypass valve, fully opening a fan outlet valve and slightly opening a fan inlet valve, wherein the starting frequency of the fan is set to be about 35HZ, slowly opening the fan, observing the pressure of a degassing tower and an oxidation tower system, only fully opening the valve under the condition that the pressure does not obviously fluctuate, then slowly closing the bypass to adjust the inlet pressure of the fan, and finally keeping the opening degree of the valve at 1/2 without fully closing the valve; the pressure change of the fan inlet and the degassing tower is observed, the running frequency of the fan can be properly adjusted to control the pressure of the fan inlet, and the pressure is maintained at about-3 kpa. And in the running process, the inspection is carried out on time, and the liquid drainage operation is carried out on the fan.
Claims (3)
1. The utility model provides a nitrogen oxide tail gas degassing unit, a serial communication port, degasser (1) top of the tower is connected through first delivery pump (6-1) and first tail gas absorption tower (2) tower cauldron air inlet, first tail gas absorption tower (2) tower top gas outlet is connected through second delivery pump (6-2) and second tail gas absorption tower (3) tower cauldron air inlet, second tail gas absorption tower (3) tower top gas outlet is connected with roots's fan (6-4) air inlet through third delivery pump (6-3), roots's fan (6-4) gas outlet is connected with third tail gas absorption tower (5) air inlet.
2. The nitrogen oxide tail gas degassing device according to claim 1, characterized in that the degassing tower (1) is provided with a nitrogen gas supplementing pipe (7).
3. The nitrogen oxide tail gas degassing device according to claim 1, wherein the gas outlet at the top of the second tail gas absorption tower (3) is further connected with the gas inlet at the middle part of the gas-liquid separator (4) through a third delivery pump (6-3), and the gas outlet at the top of the gas-liquid separator (4) is connected with the gas inlet of the Roots blower (6-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122900250.9U CN216537715U (en) | 2021-11-24 | 2021-11-24 | Nitrogen oxide tail gas degassing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122900250.9U CN216537715U (en) | 2021-11-24 | 2021-11-24 | Nitrogen oxide tail gas degassing device |
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| Publication Number | Publication Date |
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| CN216537715U true CN216537715U (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122900250.9U Active CN216537715U (en) | 2021-11-24 | 2021-11-24 | Nitrogen oxide tail gas degassing device |
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| CN (1) | CN216537715U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115611784A (en) * | 2022-09-20 | 2023-01-17 | 张怀有 | Method for removing nitrogen dioxide in dimethyl sulfoxide |
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2021
- 2021-11-24 CN CN202122900250.9U patent/CN216537715U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115611784A (en) * | 2022-09-20 | 2023-01-17 | 张怀有 | Method for removing nitrogen dioxide in dimethyl sulfoxide |
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