CN108654532A - The device and technique of two sodium conversion production sodium nitrate - Google Patents
The device and technique of two sodium conversion production sodium nitrate Download PDFInfo
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- CN108654532A CN108654532A CN201810184472.5A CN201810184472A CN108654532A CN 108654532 A CN108654532 A CN 108654532A CN 201810184472 A CN201810184472 A CN 201810184472A CN 108654532 A CN108654532 A CN 108654532A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
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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
- B01D53/1406—Multiple stage absorption
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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
- B01D53/18—Absorbing units; Liquid distributors therefor
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/06—Preparation with gaseous nitric acid or nitrogen oxides
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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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
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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
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Inorganic Chemistry (AREA)
- Agronomy & Crop Science (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses devices and technique that a kind of two sodium converts production sodium nitrate, belong to sodium nitrate production field.Solves the problem of prior art cost of investment height, low yield.The device of the two sodium conversion production sodium nitrate, including converter, converter and absorption tower, it further include ammonium oxidation apparatus, the ammonium oxidation apparatus is directly connected with converter, converter top is connected with absorption tower, converter bottom end is connected with converter, and converter top is connected with sub- mother liquid of sodium input pipe.The processing step is：Sub- mother liquid of sodium in sub- mother liquid of sodium input pipe is continuously introduced into the pre-inversion section on converter top, by distributor spray and under, ammonium oxidation apparatus generate NOXValve regulation is blown by gas access in converter gas after the adjustment, sub- mother liquid of sodium and NOXBack flow of gas haptoreaction, conversion fluid is exported by conversion fluid to flow out and squeezes into converter；Tail gas is by being discharged into absorption tower absorption processing at the top of converter.The present invention can be used for producing sodium nitrate.
Description
Technical field
The present invention relates to devices and technique that a kind of two sodium converts production sodium nitrate, belong to sodium nitrate production field.
Background technology
Dust technology and sodium nitrite mother liquor conversion (being also nitrification) method is generally used to produce nitric acid in modern industrial production
Sodium.Main process is：The nitrogen oxides that ammoxidation generates is directly entered alkali adsorption tower after waste heat boiler absorbs heat, produces original
Feed liquid obtains sodium nitrate and sodium nitrite mixed solution, and sodium nitrite is made through processes such as pervaporation, crystallization and separation；Sub- sodium is female
Liquid converts sodium nitrite to sodium nitrate by conversion process.Sodium nitrite mother liquor conversion reaction equation be：
3NaNO2+2HNO3=3NaNO3+2NO+H2O
The process that mother liquor Sodium Nitrite adds nitric acid oxidation to produce sodium nitrate is known as converting, the conversion of sodium nitrite mother liquor is
Produce the master operation of sodium nitrate.Conventional reformat device has brought a large amount of water into due to adding dust technology and has caused conversion fluid concentration
It is relatively low, it is realized since dust technology needs the nitric acid plant to pass through acid absorption column, causes that equipment investment is big, high energy consumption.Alkali absorption by
It causes NO oxygenation efficiency higher in the bad control of oxidizability, influences to neutralize liquid proportional, finally influence product proportion.
Invention content
It is an object of the invention to overcome disadvantages mentioned above to provide a kind of device of two sodium conversion production sodium nitrate, equipment is reduced
Input saves operating cost.
The present invention additionally provides a kind of technique of two sodium conversion production sodium nitrate simultaneously, reduces the NO oxidations in tail gas
Rate improves the ratio and sodium nitrate yield of neutralizer.
The device of the two sodium conversion production sodium nitrate, including converter, converter and absorption tower, further include ammoxidation
Device, the ammonium oxidation apparatus are directly connected with converter, and converter top is connected with absorption tower, converter bottom end and converter
It is connected, converter top is connected with sub- mother liquid of sodium input pipe.
Cooling device is equipped between the ammonium oxidation apparatus and converter.
The absorption tower includes alkali adsorption tower and Alkali absorption vent gas treatment tower, and the alkali adsorption tower is equipped with two or more,
The offgas outlet of converter is directly connected with Alkali absorption vent gas treatment tower.
Absorbing separator is equipped between the converter and absorption tower, absorbing separator top is connected with alkali adsorption tower,
Bottom end is connected with the separating liquid entrance of converter.
It is defeated that the converter is divided into top pre-inversion section, middle part conversion absorber portion and lower part liquid storing section, sub- mother liquid of sodium
The entrance for entering pipe is located at top pre-inversion section, and converting absorber portion adjacent position with middle part on the liquid storing section of lower part is equipped with gas access,
Separating liquid entrance is located at lower part liquid storing section.
It is equipped between the converter and converter and converts continuous liquid relief pump.
The technique of the two sodium conversion production sodium nitrate, includes the following steps：
Sub- mother liquid of sodium in sub- mother liquid of sodium input pipe is continuously introduced into the pre-inversion section on converter top, by distributor spray
Under, the NO of ammonium oxidation apparatus generationXValve regulation is blown by gas access in converter gas after the adjustment, sub- mother liquid of sodium and NOXGas
Counter current contacting is reacted, and conversion fluid is exported by conversion fluid to flow out and squeeze into converter；Tail gas at the top of converter by being discharged into absorption
Tower absorption is handled.
The NO that the ammonium oxidation apparatus generatesXGas first passes through cooling device cooling before being blown into converter.
It is 1.0-2.5g/L that the conversion fluid adjusts acid-base value to acidity in converter.
The tail gas being discharged at the top of converter initially enters absorbing separator, and nitric acid drop returns to conversion after absorption and separation
Tower, tail gas then enters alkali adsorption tower, and is passed through the NOx gases from two sodium ammonium oxidation apparatus into alkali adsorption tower simultaneously.
Compared with prior art the beneficial effects of the invention are as follows：
In existing nitre process for producing sodium, sodium nitrite is converted with nitric acid, and dust technology is needed through ammoxidation and acid
Two procedures are absorbed to be produced.The present invention uses the high concentrate NOx gas from ammoxidation, by the generation that cools rapidly
A large amount of NO2Gas is sent into converter and is converted, and dust technology is substituted.
PH value can be controlled by NOx gas temperatures in converter of the present invention, sub- mother liquid of sodium continuous charging, liquid in tower
Position realizes nitre sodium continuous production, is conducive to automation control, expand by converting the continuous shifting material control of liquid relief pump, the present invention
Big production capacity.
It is further to enter back into absorbing separator after the washing of top pre-inversion section for high concentrate NOx gas from ammoxidation
Separation removes the sodium nitrate carried secretly in tail gas, solves the problems, such as that tail gas carrying liquid influences postorder Alkali absorption effect, the tail after separation
The alkali adsorption tower of pneumatic transmission toward Alkali absorption process continues to be absorbed and utilized.
It is a large amount of to generate a large amount of NO gas consumptions after conversion reaction for the tail gas that the present invention is come out due to inverting tower
Oxygen so that the NO oxygenation efficiency in tail gas is extremely low (being reduced to 5% by traditional 30%).By the way that tail gas is passed through alkali adsorption tower
NOx gas mixings interior and from two sodium ammonium oxidation apparatus, reduce the oxygenation efficiency of entire mixed gas (by traditional indirectly
20% is reduced to the ratio for 12%) improving neutralizer (by traditional 15:1 is increased to 18:1).PH in converter in the present invention
Value is controlled by high concentration nitrogen oxide gas device (ammonium oxidation apparatus) by adjusting NOx gas temperatures control NOX oxidation degree
System.The present invention substantially increases conversion rate of products, it is made to be increased to close to 100% by traditional 70%.
Description of the drawings
Fig. 1 is the apparatus structure schematic diagram of two sodium conversion production sodium nitrate of the invention；
Wherein, 1, ammonium oxidation apparatus；2, cooling device；3, absorbing separator；4, converter；5, Alkali absorption vent gas treatment
Tower；6, alkali adsorption tower；7, separating liquid entrance；8, gas access；9, conversion fluid exports；10, continuous liquid relief pump is converted；11, it converts
Device；11-1, air intake；11-2, nitric acid entrance；11-3, alkali liquor inlet；11-4, offgas outlet；12, sub- mother liquid of sodium input pipe；
13, regulating valve.
Specific implementation mode
With reference to specific embodiment, the present invention will be further described.
Embodiment 1
The device of the two sodium conversion production sodium nitrate, including converter 4, converter 11 and absorption tower, further include ammonia
Oxidation unit 1, the ammonium oxidation apparatus 1 are directly connected with converter 4, and 4 top of converter is connected with absorption tower, 4 bottom of converter
End is connected with converter 11, and 4 top of converter is connected with sub- mother liquid of sodium input pipe 12.
Embodiment 2
The device of the two sodium conversion production sodium nitrate, including converter 4, converter 11 and absorption tower, further include ammonia
Oxidation unit 1, the ammonium oxidation apparatus 1 are directly connected with converter 4, and 4 top of converter is connected with absorption tower, 4 bottom of converter
End is connected with converter 11, and 4 top of converter is connected with sub- mother liquid of sodium input pipe 12.The ammonium oxidation apparatus 1 and converter 4 it
Between be equipped with cooling device 2.The absorption tower includes alkali adsorption tower 6 and Alkali absorption vent gas treatment tower 5, and the alkali adsorption tower 6 is equipped with
The offgas outlet 11-4 of two or more, converter 11 is directly connected with Alkali absorption vent gas treatment tower 5.4 He of converter
Absorbing separator 3 is equipped between absorption tower, 3 top of absorbing separator is connected with alkali adsorption tower 6, the separation of bottom end and converter 4
Liquid entrance 7 is connected.The converter 4 divides converts absorber portion and lower part liquid storing section for top pre-inversion section, middle part, and sub- sodium is female
The entrance of liquid input pipe 12 is located at top pre-inversion section, and converting absorber portion adjacent position with middle part on the liquid storing section of lower part is equipped with gas
Entrance 8, separating liquid entrance 7 are located at lower part liquid storing section.It is equipped between the converter 4 and converter 11 and converts continuous liquid relief pump
10。
Embodiment 3
The technique of the two sodium conversion production sodium nitrate, includes the following steps：
Sub- mother liquid of sodium in sub- mother liquid of sodium input pipe 12 is continuously introduced into the pre-inversion section on 4 top of converter, is sprayed by distributor
Leaching and under, ammonium oxidation apparatus 1 generate NOXGas is adjusted after the cooling of apparatus for supercooling 2 through regulating valve 13 to be blown by gas access 8
Enter in converter 4, sub- mother liquid of sodium and NOXBack flow of gas haptoreaction, conversion fluid are flowed out by conversion fluid outlet 9 and squeeze into converter
11, it is 1.0-2.5g/L that conversion fluid adjusts acid-base value to acidity in converter 11；The tail gas that the top of converter 4 is discharged first into
Enter absorbing separator 3, nitric acid drop returns to converter 4 after absorption and separation, and tail gas then enters alkali adsorption tower 6, and simultaneously to alkali
The NOx gases from two sodium ammonium oxidation apparatus are passed through in absorption tower 6.
NOXGas temperature is lower, NO2Generation ratio is higher, the NO that ammonium oxidation apparatus 1 generates in the present inventionXGas passes through drop
Low temperature controls NO2This gas is blown into converter 4 80% or more and replaces dust technology, sub- mother liquid of sodium and NO by ratioXGas
Counter current contacting is reacted, sub- mother liquid of sodium continuous charging, and liquid level continuously moves material control by converting continuous liquid relief pump 10 in tower, realizes
Nitre sodium continuous production, is conducive to automation control, expands production capacity.
Converter 11 is equipped with air intake 11-1, nitric acid entrance 11-2 and alkali liquor inlet 11-3, can be used for adjusting and turns
Change liquid acid-base value, it is qualifying liquid that conversion fluid adjusting acid-base value to the acidity for being transferred to converter 11, which is 1.0-2.5g/L,.
NOx gases carry out conversion reaction with sub- mother liquid of sodium and circulation fluid on filler surface：
3NO2+H2O==2HNO3+NO
3NaNO2+2HNO3==3NaNO3+H2O+2NO↑
2NO+O2==2NO2
Three above reaction alternately and is carried out at the same time in converter, and sub- sodium is converted to nitre sodium.
Total reaction equation
NaNO2+NO2==NaNO3+NO↑
It is a large amount of to generate a large amount of NO gas consumptions after conversion reaction for the tail gas that the present invention is come out due to inverting tower
Oxygen so that the NO oxygenation efficiency in tail gas is extremely low (being reduced to 5% by traditional 30%).By the way that tail gas is passed through alkali adsorption tower
NOx gas mixings interior and from two sodium ammonium oxidation apparatus, reduce the oxygenation efficiency of entire mixed gas (by traditional indirectly
20% is reduced to the ratio for 12%) improving neutralizer (by traditional 15:1 is increased to 18:1).PH in converter in the present invention
Value is controlled by high concentration nitrogen oxide gas device (ammonium oxidation apparatus) by adjusting NOx gas temperatures control NOX oxidation degree
System.The present invention substantially increases conversion rate of products, it is made to be increased to close to 100% by traditional 70%.
Claims (10)
1. a kind of device of two sodium conversion production sodium nitrate, including converter (4), converter (11) and absorption tower, feature exist
In：Further include ammonium oxidation apparatus (1), the ammonium oxidation apparatus (1) is directly connected with converter (4), converter (4) top and suction
It receives tower to be connected, converter (4) bottom end is connected with converter (11), and converter (4) top is connected with sub- mother liquid of sodium input pipe (12).
2. the device of two sodium conversion production sodium nitrate according to claim 1, it is characterised in that：The ammonium oxidation apparatus
(1) cooling device (2) is equipped between converter (4).
3. the device of two sodium conversion production sodium nitrate according to claim 2, it is characterised in that：The absorption tower includes alkali
Absorption tower (6) and Alkali absorption vent gas treatment tower (5), the alkali adsorption tower (6) are equipped with two or more, the tail gas of converter (11)
Outlet (11-4) is directly connected with Alkali absorption vent gas treatment tower (5).
4. the device of two sodium conversion production sodium nitrate according to claim 3, it is characterised in that：The converter (4)
Absorbing separator (3) is equipped between absorption tower, absorbing separator (3) top is connected with alkali adsorption tower (6), bottom end and converter
(4) separating liquid entrance (7) is connected.
5. the device of two sodium conversion production sodium nitrate according to claim 4, it is characterised in that：The converter (4)
It is divided into top pre-inversion section, middle part conversion absorber portion and lower part liquid storing section, the entrance of sub- mother liquid of sodium input pipe (12) is positioned at upper
Portion's pre-inversion section is equipped with gas access (8) on the liquid storing section of lower part, separating liquid entrance (7) with middle part conversion absorber portion adjacent position
Positioned at lower part liquid storing section.
6. the device of two sodium conversion production sodium nitrate according to claim 5, it is characterised in that：The converter (4)
It is equipped between converter (11) and converts continuous liquid relief pump (10).
7. a kind of technique of two sodium conversion production sodium nitrate, it is characterised in that include the following steps：
Sub- mother liquid of sodium in sub- mother liquid of sodium input pipe (12) is continuously introduced into the pre-inversion section on converter (4) top, is sprayed by distributor
Leaching and under, ammonium oxidation apparatus (1) generate NOXValve (13) adjusting is blown into converter (4) to gas by gas access (8) after the adjustment
In, sub- mother liquid of sodium and NOXBack flow of gas haptoreaction, conversion fluid are flowed out by conversion fluid outlet (9) and squeeze into converter (11)；Tail
Gas is by being discharged into absorption tower absorption processing at the top of converter (4).
8. the technique of two sodium conversion production sodium nitrate according to claim 7, it is characterised in that：The ammonium oxidation apparatus
(1) NO generatedXIt is cooling that gas first passes through cooling device (2) before being blown into converter (4).
9. the technique of two sodium conversion production sodium nitrate according to claim 8, it is characterised in that：The conversion fluid is turning
It is 1.0-2.5g/L to change adjusting acid-base value to acidity in device (11).
10. the technique of two sodium conversion production sodium nitrate according to claim 9, it is characterised in that：Row at the top of converter (4)
The tail gas gone out initially enters absorbing separator (3), and nitric acid drop returns to converter (4) after absorption and separation, and tail gas then enters alkali
Absorption tower (6), and simultaneously the NOx gases from two sodium ammonium oxidation apparatus are passed through into alkali adsorption tower (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810184472.5A CN108654532A (en) | 2018-03-07 | 2018-03-07 | The device and technique of two sodium conversion production sodium nitrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810184472.5A CN108654532A (en) | 2018-03-07 | 2018-03-07 | The device and technique of two sodium conversion production sodium nitrate |
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| Publication Number | Publication Date |
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| CN108654532A true CN108654532A (en) | 2018-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810184472.5A Pending CN108654532A (en) | 2018-03-07 | 2018-03-07 | The device and technique of two sodium conversion production sodium nitrate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109573969A (en) * | 2018-11-07 | 2019-04-05 | 襄阳泽东化工集团有限公司 | A kind of process units of sodium nitrite |
| CN113663495A (en) * | 2021-06-22 | 2021-11-19 | 襄阳泽东化工集团有限公司 | System and process for improving nitrite ratio in production of sodium-sodium product |
| CN115155277A (en) * | 2022-06-16 | 2022-10-11 | 西安明时工程技术有限责任公司 | Method for reducing nitrogen oxides in tail gas in nitrate production |
| CN115557476A (en) * | 2022-09-20 | 2023-01-03 | 成都德美工程技术有限公司 | Nitrogen dioxide preparation device and preparation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0754651A1 (en) * | 1995-07-18 | 1997-01-22 | BASF Aktiengesellschaft | Surface treatment of crystalline sodium nitrite or sodium nitrate |
| CN105236451A (en) * | 2015-09-30 | 2016-01-13 | 临沂鲁光化工集团有限公司 | Method and apparatus for continuous conversion production of sodium nitrate |
-
2018
- 2018-03-07 CN CN201810184472.5A patent/CN108654532A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0754651A1 (en) * | 1995-07-18 | 1997-01-22 | BASF Aktiengesellschaft | Surface treatment of crystalline sodium nitrite or sodium nitrate |
| CN105236451A (en) * | 2015-09-30 | 2016-01-13 | 临沂鲁光化工集团有限公司 | Method and apparatus for continuous conversion production of sodium nitrate |
Non-Patent Citations (2)
| Title |
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| 唐文骞: "亚硝酸钠连续转化工艺", 《化工设计》 * |
| 锡秀屏: "亚硝酸钠、硝酸钠生产工艺的改进和污染防治", 《小氮肥设计技术》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109573969A (en) * | 2018-11-07 | 2019-04-05 | 襄阳泽东化工集团有限公司 | A kind of process units of sodium nitrite |
| CN109573969B (en) * | 2018-11-07 | 2022-01-18 | 襄阳泽东化工集团股份有限公司 | Sodium nitrite production device |
| CN113663495A (en) * | 2021-06-22 | 2021-11-19 | 襄阳泽东化工集团有限公司 | System and process for improving nitrite ratio in production of sodium-sodium product |
| CN113663495B (en) * | 2021-06-22 | 2023-11-24 | 襄阳泽东化工集团有限公司 | System and process for improving nitrite ratio in production of two sodium products |
| CN115155277A (en) * | 2022-06-16 | 2022-10-11 | 西安明时工程技术有限责任公司 | Method for reducing nitrogen oxides in tail gas in nitrate production |
| CN115557476A (en) * | 2022-09-20 | 2023-01-03 | 成都德美工程技术有限公司 | Nitrogen dioxide preparation device and preparation method |
| CN115557476B (en) * | 2022-09-20 | 2024-03-26 | 成都德美工程技术有限公司 | Nitrogen dioxide preparation device and preparation method |
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Application publication date: 20181016 |