CN111644019A - Production method of nitrogen oxide gas full-automatic pressure absorption process - Google Patents
Production method of nitrogen oxide gas full-automatic pressure absorption process Download PDFInfo
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- CN111644019A CN111644019A CN202010523788.XA CN202010523788A CN111644019A CN 111644019 A CN111644019 A CN 111644019A CN 202010523788 A CN202010523788 A CN 202010523788A CN 111644019 A CN111644019 A CN 111644019A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
Abstract
The invention discloses a production method of a nitrogen oxide gas full-automatic pressurizing and absorbing process, wherein the used nitrogen oxide gas full-automatic pressurizing and absorbing device system comprises: the invention relates to the technical field of chemical engineering, in particular to an absorption water regulating valve tower top pressure transmitter, an absorption water reflux valve tower top pressure transmitter, a tower bottom liquid level regulating valve tower top pressure transmitter, a tail gas regulating valve tower top pressure transmitter and a separator gas phase outlet regulating valve tower top pressure transmitter. The production method of the nitrogen oxide gas full-automatic pressurization absorption process can realize one-key starting of the device, can automatically operate according to set parameters without manual intervention, can automatically operate according to the set parameters, keeps the liquid level of the circulation cavity of the liquid ring compressor separator constant, keeps the liquid ring of the compressor constant, adopts DCS full-automatic control, does not need daily field operators, can stably control the concentration of dilute nitric acid, stably controls the concentration of tail gas to reach the standard, and reduces four field full-time operators.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a production method of a nitrogen oxide gas full-automatic pressurizing and absorbing process.
Background
The nitrogen oxide gas pressure absorption technology is the advanced nitrogen oxide waste gas treatment technology at present, the general operation pressure is 0.65mPa, and the content of nitrogen oxide in tail gas is 240mg/m3Hereinafter, the usual column type is a bubble-cap absorption column (in terms of nitrogen dioxide).
The prior art is as follows: the nitrogen oxide pressurizing and absorbing device consists of a liquid ring compressor unit and a nitrogen oxide absorbing tower, wherein the absorption water is pressurized to be more than 0.7mPa by a plug-assist pump, the last tower plate is added from the top of the nitrogen oxide absorbing tower, the absorption water is manually adjusted from the top to the bottom of the last tower plate to be subjected to absorption reaction with the nitrogen oxide gas from the bottom of the nitrogen oxide absorbing tower, and after the nitrogen oxide gas is absorbed by water, the tail gas reaches 240mg/m3Then (calculated by nitrogen dioxide) is discharged into the atmosphere through the top of the tower; dilute nitric acid with the concentration of 25-35% is obtained at the bottom of the tower; the dilute nitric acid with the concentration of 25% -35% enters a liquid ring compressor unit to be circularly increased to the concentration of 45% -50%, the dilute nitric acid with the concentration of 45% -50% is used as circulating working liquid of the liquid ring compressor unit, the liquid level of the liquid ring compressor unit is controlled by an outlet regulating valve of a gas-liquid separator, and the dilute nitric acid with the concentration of 45% -50% which exceeds the liquid level is discharged out of a nitrogen oxide absorption system by the regulating valve; meanwhile, the raw material nitric oxide gas to be treated works through a nitric oxide compressor unit, the pressure is increased to over 0.65mPa from the normal pressure, and the concentration of the finished product dilute nitric acid is manually adjusted.
The existing nitrogen oxide pressure absorption technology has defects in automatic operation:
1. the absorption water pump is a metering pump, the installation position is generally at a position with a height of 30m, and when the water quantity of the device needs to be adjusted, manual adjustment is needed;
2. the liquid level of a tower plate in the bubble cap absorption tower is unstable, and the delay between the change of the liquid level at the bottom of the tower and the change of the absorbed water amount at the top of the tower is longer, which is more than several hours;
3. the liquid level of the nitric oxide pressurized absorption liquid ring compressor separator is controlled by a common regulating valve, and the liquid level of the separator cannot be controlled due to damage of the regulating valve or the problem of liquid level flow balance delay;
4. nitric acid which is a nitrogen oxide absorption product cannot realize automatic concentration adjustment;
5. after the flow of the nitric oxide gas is changed, the parameters need to be manually adjusted.
When the nitrogen oxide compressor is started, an operator operates the compressor unit to the nitrogen oxide gas manual valve of the nitrogen oxide absorption tower; one employee operates the manual balancing valve of the nitrogen oxide compressor unit, one employee operates the power switch, and four full-time operators need to be equipped with knowledge to carry out production operation.
Through years of experiments and improvement, the device process route and the production method are designed by self, break through the traditional technical idea and are a brand new process system and method for realizing the full-automatic pressurized absorption of the nitrogen oxide gas and eliminating full-time operators.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a production method of a nitrogen oxide gas full-automatic pressurizing and absorbing process, which realizes one-key starting of the device by adopting a nitrogen oxide absorbing full-automatic process technology and matching with a DCS system.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a production method of a nitrogen oxide gas full-automatic pressurized absorption process, wherein the used nitrogen oxide gas full-automatic pressurized absorption device system comprises: absorption water regulating valve, absorption water reflux valve, tower bottom liquid level regulating valve, tail gas regulating valve, separator gas phase outlet regulating valve, separator outlet liquid phase regulating valve, compressor unit gas phase balance valve, compressor unit liquid supplementing valve, absorption water tank level gauge, tower bottom level gauge, separator level gauge, absorption water flowmeter, dilute nitric acid concentration meter, tower top pressure transmitter, separator pressure transmitter, compressor unit inlet pressure transmitter, absorption water tank, nitric oxide absorption tower, separator, circulating acid cooler and liquid ring compressor, the production method specifically comprises the following steps:
s1, firstly, detecting the pressure of nitric oxide gas from a waste acid treatment device and a nitration device through a compressor unit inlet pressure transmitter, then sequentially entering a liquid ring compressor, a circulating acid cooler, a dilute nitric acid concentration meter and a separator 19, and then changing the opening of a compressor unit gas phase balance valve according to the pressure detected by the compressor unit inlet pressure transmitter;
s2, adjusting the opening of a liquid replenishing valve of the compressor unit according to the concentration parameter detected by the dilute nitric acid concentration meter, and controlling the liquid replenishing amount;
s3, determining the parameters of a liquid level meter at the bottom of the nitrogen oxide absorption tower by the opening degree of a liquid replenishing valve of a compressor set, wherein the parameters of the liquid level meter at the top of the nitrogen oxide absorption tower are not lower than a set lower limit, the absorption water of the nitrogen oxide absorption tower comes from the absorption water of an absorption water flowmeter, and when the parameters of the liquid level meter at the bottom of the nitrogen oxide absorption tower are lower than the set lower limit, a liquid level regulating valve at the bottom of the;
s4, the flow of the absorption water flow meter automatically drops, the flow meter feeds back signals, the absorption water return valve automatically adjusts to meet the numerical value of the absorption water flow meter, the change of the absorption water amount acts on the absorption water tank liquid level meter, and the absorption water adjusting valve automatically adjusts the water inflow amount;
s5, because of the arrangement of the liquid level control board, the liquid level of the circulating cavity of the separator is constant, redundant liquid in the separator overflows to the liquid storage cavity of the separator, the liquid level in the liquid storage cavity is displayed by the liquid level meter of the separator, the liquid level value is fed back to the liquid phase regulating valve at the outlet of the separator, and the finished product dilute nitric acid is conveyed out of the nitric oxide absorption device;
s6, when the pressure of the pressure transmitter of the separator reaches a specified value, the gas automatically enters the tower bottom of the nitrogen oxide absorption tower through the gas phase outlet regulating valve of the separator, and the data of the pressure transmitter at the top of the tower is fed back to the tail gas regulating valve to discharge the tail gas reaching the standard into the atmosphere.
Preferably, the circulating acid cooler in the step S1 is a dilute nitric acid circulating condenser.
Preferably, in step S1, the pressure at the inlet and the outlet of the liquid ring compressor is adjusted by the opening of a gas phase balance valve of the compressor unit, the inlet pressure is 95 to 97KPa, and the outlet pressure is 0.6 to 0.7 mPa.
Preferably, an automatic regulating valve is arranged from the liquid ring compressor to the nitrogen oxide absorption tower, and the opening degree is controlled by a pressure transmitter of the separator.
Preferably, the dilute nitric acid concentration meter is arranged on a unit circulating pipe communicated with the liquid ring compressor and used for measuring the concentration of the circulating finished dilute nitric acid and feeding back a signal to a liquid replenishing valve of the compressor unit to control the concentration of the dilute nitric acid.
Preferably, the separator of the compressor unit is respectively provided with a liquid level limiting plate and a constant liquid level damping plate for keeping the liquid level of the circulating dilute nitric acid constant.
Preferably, the absorption water increases a liquid replenishing valve of the compressor unit to the bottom of the nitric oxide absorption tower, and the liquid replenishing valve is used for replenishing the liquid level of the bottom of the nitrogen oxide absorption tower in real time when the liquid level of the bottom of the nitrogen oxide absorption tower is lower than the lower limit.
Preferably, the amount of water added to the top of the absorption water column is set constantly.
(III) advantageous effects
The invention provides a production method of a nitrogen oxide gas full-automatic pressurizing and absorbing process. Compared with the prior art, the method has the following beneficial effects:
(1) the production method of the full-automatic pressurized absorption process of the nitrogen oxide gas comprises the following steps: absorption water regulating valve, absorption water reflux valve, tower bottom liquid level regulating valve, tail gas regulating valve, separator gas phase outlet regulating valve, separator outlet liquid phase regulating valve, compressor unit gas phase balance valve, compressor unit liquid supplementing valve, absorption water tank level gauge, tower bottom level gauge, separator level gauge, absorption water flowmeter, dilute nitric acid concentration meter, tower top pressure transmitter, separator pressure transmitter, compressor unit inlet pressure transmitter, absorption water tank, nitrogen oxide absorption tower, separator, circulation acid cooler and liquid ring compressor, can realize through adopting the full-automatic technology of nitrogen oxide absorption, cooperate the DCS system, realize that the device starts by key, can move according to setting for the parameter automatically, do not need manual intervention.
(2) The production method of the full-automatic pressurized absorption process for the nitrogen oxide gas, disclosed by the invention, can automatically run according to set parameters, the liquid level of a circulating cavity of a liquid ring compressor separator is constant, the liquid ring of the compressor is kept constant, DCS (distributed control system) full-automatic control is adopted, daily field operators are not needed, and the concentration of the dilute nitric acid of the product is stable.
(3) The production method of the nitrogen oxide gas full-automatic pressurized absorption process can stably control the concentration of the dilute nitric acid, stably control the concentration of the tail gas to reach the standard, reduce four field full-time operators, save labor cost by about 40 ten thousand yuan per year and generate a large amount of economic benefits.
Drawings
FIG. 1 is a schematic diagram of a fully automatic pressurized absorption process of nitric oxide gas according to the present invention.
In the figure, 1, an absorption water regulating valve; 2. an absorption water reflux valve; 3. a tower bottom liquid level regulating valve; 4. a tail gas regulating valve; 5. a separator gas phase outlet regulating valve; 6. a separator outlet liquid phase regulating valve; 7. a gas phase balance valve of the compressor unit; 8. a compressor unit liquid replenishing valve; 9. an absorption water tank level gauge; 10. a liquid level meter at the bottom of the tower; 11. a separator level gauge; 12. an absorbed water flow meter; 13. a dilute nitric acid concentration meter; 14. a tower top pressure transmitter; 15. a separator pressure transmitter; 16. an inlet pressure transmitter of the compressor unit; 17. an absorption water tank 18 and a nitrogen oxide absorption tower; 19. a separator; 20. a circulating acid cooler, 21 and a liquid ring compressor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a technical solution: a production method of a nitrogen oxide gas full-automatic pressurized absorption process, wherein the used nitrogen oxide gas full-automatic pressurized absorption device system comprises: absorption water regulating valve 1, absorption water reflux valve 2, tower bottom liquid level regulating valve 3, tail gas regulating valve 4, separator gas phase outlet regulating valve 5, separator outlet liquid phase regulating valve 6, compressor unit gas phase balance valve 7, compressor unit liquid supplementing valve 8, absorption water tank level gauge 9, tower bottom level gauge 10, separator level gauge 11, absorption water flowmeter 12, dilute nitric acid concentration meter 13, tower top pressure transmitter 14, separator pressure transmitter 15, compressor unit inlet pressure transmitter 16, absorption water tank 17, nitric oxide absorption tower 18, separator 19, circulating acid cooler 20 and liquid ring compressor 21, the production method specifically comprises the following steps:
s1, firstly, detecting pressure of nitric oxide gas from a waste acid treatment device and a nitration device through a compressor unit inlet pressure transmitter 16, then sequentially entering a liquid ring compressor 21, a circulating acid cooler 20, a dilute nitric acid concentration meter 13 and a separator 19, then opening a compressor unit gas phase balance valve 7 according to pressure change detected by the compressor unit inlet pressure transmitter 16, wherein the circulating acid cooler 20 adopts a dilute nitric acid circulating condenser, pressure of an inlet and an outlet of the liquid ring compressor 21 is adjusted by the opening of the compressor unit gas phase balance valve 7, inlet pressure is 95-97KPa, and outlet pressure is 0.6-0.7 mPa;
s2, adjusting the opening of a compressor unit liquid supplementing valve 8 according to the concentration parameter detected by the dilute nitric acid concentration meter 13, and controlling the liquid supplementing amount;
s3, determining parameters of a tower bottom liquid level meter 10 of the nitrogen oxide absorption tower 18 by the opening degree of a compressor set liquid supplementing valve 8, wherein the parameters of the tower top liquid level meter are not lower than a set lower limit, the absorption water of the nitrogen oxide absorption tower 18 comes from the absorption water of the absorption water flow meter 12, and when the parameters of the tower bottom liquid level meter 10 are lower than the set lower limit, the tower bottom liquid level regulating valve 3 automatically opens for supplementing water;
s4, the flow of the absorption water flow meter 12 automatically drops, the flow meter feeds back signals, the absorption water reflux valve 2 automatically adjusts to meet the numerical value of the absorption water flow meter 12, the change of the absorption water amount acts on the absorption water tank liquid level meter 9, and the absorption water adjusting valve 1 automatically adjusts the water inflow amount;
s5, because a liquid level control plate is arranged, the liquid level of a circulation cavity of the separator 19 is constant, redundant liquid in the separator 19 overflows to a liquid storage cavity of the separator, a liquid level meter 11 of the separator displays the liquid level in the liquid storage cavity, the liquid level value is fed back to a liquid phase regulating valve 6 at the outlet of the separator, and the finished product dilute nitric acid is conveyed out of the nitric oxide absorption device;
s6, when the pressure of the pressure transmitter 15 of the separator reaches a specified value, the gas automatically enters the tower bottom of the nitrogen oxide absorption tower 18 through the gas phase outlet regulating valve 5 of the separator, and the data of the pressure transmitter 14 at the top of the tower is fed back to the tail gas regulating valve 4 to discharge the tail gas reaching the standard into the atmosphere.
The upper part of a liquid ring compressor 21 is connected with a compressor unit inlet pressure transmitter 16, a compressor unit liquid supplementing valve 8 and a compressor unit gas phase balance valve 7, the right side of the liquid ring compressor 21 is connected with a circulating acid cooler 20, the right side of the circulating water cooler 20 is connected with a dilute nitric acid concentration meter 13, the right side of the dilute nitric acid concentration meter 13 is connected with a separator 19, the separator 19 is connected with a separator liquid level meter 11, a separator outlet liquid phase regulating valve 6, the upper part of the separator 19 is connected with a separator pressure transmitter 15, a separator gas phase outlet regulating valve 5, the upper right part of the separator 19 is connected with a nitrogen oxide absorption tower 18, the lower left side of the nitrogen oxide absorption tower 18 is connected with a tower bottom liquid level regulating valve 3, the lower right side of the nitrogen oxide absorption tower 18 is connected with a tower bottom liquid level meter 10, the upper left side of the nitrogen oxide absorption tower 18 is connected with an, the absorption water reflux valve 2 is connected on the left side of the absorption water flowmeter 12, the absorption water tank 17 is arranged on the left side of the nitric oxide absorption tower 18, the absorption water tank liquid level meter 9 is arranged on the left side of the absorption water tank 17, the absorption water regulating valve 1 is connected above the absorption water tank 17, and other connecting pipelines are a plurality of.
In the invention, the gas phase balance valve 7 of the compressor set is an automatic regulating valve.
In the invention, the dilute nitric acid concentration meter 13 is a density tester and is used for detecting the dilute nitric acid concentration to be 45-50%.
In the invention, the separator 19 comprises a shell, a circulating cavity, a liquid storage cavity, a liquid level control plate and a constant liquid damping plate, and is used for keeping the constant liquid level of the separator 19;
in the invention, a tower bottom liquid supplementing regulating valve is arranged for keeping the liquid level at the bottom of the nitric oxide absorption tower 18 at a normal value in real time and ensuring that the concentration of a dilute nitric acid finished product is automatically controlled at 45-50%.
In the invention, an absorption water reflux valve 2 is arranged for keeping the flow of nitrogen oxide absorption water at a constant value, ensuring that the liquid level of a tower plate of a nitrogen oxide full tower is normal, and the content of nitrogen oxide in air tail gas is lower than 240Mg/m3。
In the invention, the pipelines of the separator 19 of the liquid ring compressor 21 and the nitrogen oxide absorption tower 18 are provided with automatic regulating valves for realizing that the pressure of the liquid ring compressor 21 quickly reaches the specified pressure and quickly establishing the internal circulation of the working liquid of the liquid ring compressor 21.
In conclusion, the invention can realize that the device is started by one key by adopting a nitrogen oxide absorption full-automatic process technology and matching with a DCS system, can automatically operate according to set parameters without manual intervention, can automatically operate according to the set parameters by using the production method of the nitrogen oxide gas full-automatic pressurization absorption technology disclosed by the invention, can keep the liquid level of a 19 circulation cavity of a separator 21 of a liquid ring compressor constant, keeps the liquid ring of the compressor constant, adopts DCS full-automatic control without daily field operators, has stable concentration of the product dilute nitric acid, can stably control the concentration of the dilute nitric acid, stably controls the concentration of tail gas to reach the standard, reduces four field dedicated operators, saves labor cost by about 40 ten thousand yuan per year, and generates a great amount of economic benefit.
And those not described in detail in this specification are well within the skill of those in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A production method of a nitrogen oxide gas full-automatic pressure absorption process is characterized by comprising the following steps: the used nitrogen oxide gas full-automatic pressurizing and absorbing device system comprises: absorption water regulating valve (1), absorption water reflux valve (2), tower bottom liquid level regulating valve (3), tail gas regulating valve (4), separator gas phase outlet regulating valve (5), separator outlet liquid phase regulating valve (6), compressor unit gas phase balance valve (7), compressor unit liquid supplementing valve (8), absorption water tank liquidometer (9), tower bottom liquidometer (10), separator liquidometer (11), absorption water flowmeter (12), dilute nitric acid concentration meter (13), tower top pressure transmitter (14), separator pressure transmitter (15), compressor unit inlet pressure transmitter (16), absorption water tank (17), nitric oxide absorption tower (18), separator (19), circulating acid cooler (20) and liquid ring compressor (21), the production method specifically comprises the following steps:
s1, firstly, detecting the pressure of nitric oxide gas from a waste acid treatment device and a nitration device through a compressor unit inlet pressure transmitter (16), then sequentially entering a liquid ring compressor (21), a circulating acid cooler (20), a dilute nitric acid concentration meter (13) and a separator 19, and then changing the opening of a compressor unit gas phase balance valve (7) according to the pressure detected by the compressor unit inlet pressure transmitter (16);
s2, adjusting the opening of a compressor unit liquid supplementing valve (8) according to the concentration parameter detected by the dilute nitric acid concentration meter (13), and controlling the liquid supplementing amount;
s3, determining parameters of a tower bottom liquid level meter (10) of the nitrogen oxide absorption tower (18) by the opening degree of a compressor set liquid supplementing valve (8), wherein the parameters of the tower top liquid level meter are not lower than a set lower limit, absorption water of the nitrogen oxide absorption tower (18) comes from absorption water of an absorption water flow meter (12), and when the parameters of the tower bottom liquid level meter (10) are lower than the set lower limit, a tower bottom liquid level regulating valve (3) automatically opens water supplementing;
s4, the flow of the absorption water flow meter (12) automatically drops, the flow meter feeds back signals, the absorption water return valve (2) automatically adjusts to meet the numerical value of the absorption water flow meter (12), the change of the absorption water amount acts on the absorption water tank liquid level meter (9), and the absorption water adjusting valve (1) automatically adjusts the water inflow amount;
s5, because a liquid level control plate is arranged, the liquid level of a circulation cavity of the separator (19) is constant, redundant liquid in the separator (19) overflows to a liquid storage cavity of the separator, a liquid level meter (11) of the separator displays the liquid level in the liquid storage cavity, the liquid level value is fed back to a liquid phase regulating valve (6) at the outlet of the separator, and the finished product dilute nitric acid is conveyed out of the nitric oxide absorption device;
s6, when the pressure of the separator pressure transmitter (15) reaches a specified value, the gas automatically enters the tower bottom of the nitrogen oxide absorption tower (18) through the separator gas-phase outlet regulating valve (5), and the data of the tower top pressure transmitter (14) is fed back to the tail gas regulating valve (4) to discharge the tail gas reaching the standard into the atmosphere.
2. The production method of the full-automatic pressurized absorption process of nitrogen oxide gas according to claim 1, characterized in that: the circulating acid cooler (20) in the step S1 adopts a dilute nitric acid circulating condenser.
3. The production method of the full-automatic pressurized absorption process of nitrogen oxide gas according to claim 1, characterized in that: and in the step S1, the pressure of the inlet and the outlet of the liquid ring compressor (21) is adjusted by the opening of a gas phase balance valve (7) of the compressor unit, the inlet pressure is 95-97KPa, and the outlet pressure is 0.6-0.7 mPa.
4. The production method of the full-automatic pressurized absorption process of nitrogen oxide gas according to claim 1, characterized in that: and automatic regulating valves are arranged from the liquid ring compressor (21) to the nitrogen oxide absorption tower (18), and the opening degree is controlled by a separator pressure transmitter (15).
5. The production method of the full-automatic pressurized absorption process of nitrogen oxide gas according to claim 1, characterized in that: the dilute nitric acid concentration meter (13) is arranged on a unit circulating pipe communicated with the liquid ring compressor (21) and used for measuring the concentration of the circulating finished dilute nitric acid and feeding back a signal to the compressor unit liquid supplementing valve (8) to control the concentration of the dilute nitric acid.
6. The production method of the full-automatic pressurized absorption process of nitrogen oxide gas according to claim 1, characterized in that: and a separator (19) of the compressor unit is respectively provided with a liquid level limiting plate and a constant liquid level damping plate for keeping the liquid level of the circulating dilute nitric acid constant.
7. The production method of the full-automatic pressurized absorption process of nitrogen oxide gas according to claim 1, characterized in that: and absorbing water, and increasing a liquid replenishing valve (8) of a compressor unit to the bottom of the nitrogen oxide absorption tower (18) for replenishing the liquid level at the bottom of the tower in real time when the liquid level at the bottom of the tower is lower than the lower limit.
8. The production method of the full-automatic pressurized absorption process of nitrogen oxide gas according to claim 1, characterized in that: the water adding amount at the top of the absorption water tower is constantly set.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112783114A (en) * | 2020-12-09 | 2021-05-11 | 万华化学(宁波)氯碱有限公司 | Method and system for one-key starting hydrogen pump sequential control of hydrogen water-ring compressor |
| CN113477036A (en) * | 2021-07-24 | 2021-10-08 | 四川永祥股份有限公司 | Industrial hydrochloric acid absorption system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872668A (en) * | 2006-06-09 | 2006-12-06 | 天脊煤化工集团有限公司 | Method and equipment for transporting dilute nitric acid in procedure of producing nitric acid through dual compression method |
| CN107814365A (en) * | 2017-10-31 | 2018-03-20 | 湖北东方化工有限公司 | A kind of juice circulation method of dust technology produced by processing nitrotoleune Waste Sulfuric Acid |
| CN107875833A (en) * | 2017-12-29 | 2018-04-06 | 西安长庆科技工程有限责任公司 | It is a kind of that automatic cycle, discharge opeing and the system of fluid infusion are realized based on desulfuration absorbing tower |
| CN107892285A (en) * | 2017-10-31 | 2018-04-10 | 湖北东方化工有限公司 | A kind of method of dust technology produced by nitrotoleune Waste Sulfuric Acid using absorption tower processing |
| CN108295643A (en) * | 2018-04-08 | 2018-07-20 | 山东钢铁股份有限公司 | The washing tail gas purification system of desulfurization regeneration tower |
| CN208526255U (en) * | 2018-05-30 | 2019-02-22 | 淄博真空设备厂有限公司 | VOCs gas treatment booster system complexes |
-
2020
- 2020-06-10 CN CN202010523788.XA patent/CN111644019A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872668A (en) * | 2006-06-09 | 2006-12-06 | 天脊煤化工集团有限公司 | Method and equipment for transporting dilute nitric acid in procedure of producing nitric acid through dual compression method |
| CN107814365A (en) * | 2017-10-31 | 2018-03-20 | 湖北东方化工有限公司 | A kind of juice circulation method of dust technology produced by processing nitrotoleune Waste Sulfuric Acid |
| CN107892285A (en) * | 2017-10-31 | 2018-04-10 | 湖北东方化工有限公司 | A kind of method of dust technology produced by nitrotoleune Waste Sulfuric Acid using absorption tower processing |
| CN107875833A (en) * | 2017-12-29 | 2018-04-06 | 西安长庆科技工程有限责任公司 | It is a kind of that automatic cycle, discharge opeing and the system of fluid infusion are realized based on desulfuration absorbing tower |
| CN108295643A (en) * | 2018-04-08 | 2018-07-20 | 山东钢铁股份有限公司 | The washing tail gas purification system of desulfurization regeneration tower |
| CN208526255U (en) * | 2018-05-30 | 2019-02-22 | 淄博真空设备厂有限公司 | VOCs gas treatment booster system complexes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112783114A (en) * | 2020-12-09 | 2021-05-11 | 万华化学(宁波)氯碱有限公司 | Method and system for one-key starting hydrogen pump sequential control of hydrogen water-ring compressor |
| CN113477036A (en) * | 2021-07-24 | 2021-10-08 | 四川永祥股份有限公司 | Industrial hydrochloric acid absorption system |
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Application publication date: 20200911 |