CN105236451B - Method and apparatus for continuous conversion production of sodium nitrate - Google Patents
Method and apparatus for continuous conversion production of sodium nitrate Download PDFInfo
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- CN105236451B CN105236451B CN201510641667.4A CN201510641667A CN105236451B CN 105236451 B CN105236451 B CN 105236451B CN 201510641667 A CN201510641667 A CN 201510641667A CN 105236451 B CN105236451 B CN 105236451B
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Abstract
The invention discloses a method and an apparatus for continuous conversion production of sodium nitrate, and belongs to the technical field of production of inorganic chemical engineering products. The method mainly comprises the processes of mother liquor pre-conversion, conversion absorption and tail gas separation. The system of the apparatus mainly comprises a conversion absorption tower, a converter, an absorption separator, a matching pump and a matching pipeline, and the conversion absorption tower is a packed tower, and comprises an upper portion pre-conversion segment, a middle portion conversion absorption segment and a lower portion solution storage tank; and a conversion solution obtained after pre-conversion and conversion reactions of a mixed mother liquor and a circulating solution enters the solution storage tank, parts of the conversion solution returns to the conversion absorption tower through a conversion circulating pump, the remaining conversion solution is pumped into the converter in order to produce solid sodium nitrate, and generated tail gas is sent to a 4# alkali absorption tower, and is absorbed to produce sodium nitrite. The method and the apparatus optimize technological operation, improve the sodium nitrite conversion rate and the qualified rate of sodium nitrate, enlarge the productivity, reduce the production cost, realize continuous and automatic production of sodium nitrate and are in favor of realizing energy saving and emission reduction.
Description
Technical field
The present invention relates to a kind of method and apparatus of producing sodium nitrate through continuous conversion, belongs to inorganic chemical product production technology
Field.
Background technology
Typically using conversion (being also nitrification) method production sodium nitrate of sodium nitrite mother solution in modern industry production.Main mistake
Cheng Shi：The nitrogen oxides that ammoxidation is produced are directly entered alkali adsorption tower Jing after waste heat boiler absorbs heat, produce material liquid and obtain
Sodium nitrate and sodium nitrite mixed solution, are obtained sodium nitrite through processes such as evaporation, crystallization and separation；Sodium nitrite mother solution Jing
Cross conversion process and sodium nitrite is converted into into sodium nitrate.Sodium nitrite mother solution conversion reaction equation be：
3NaNO2+2HNO3=3NaNO3+2NO+H2O
The conversion of sodium nitrite mother solution is the master operation for producing sodium nitrate, adds nitric acid oxidation to produce mother solution Sodium Nitrite
The process of sodium nitrate is referred to as converted.The mixing flow quantity that traditional intermittent conversion device enters converter is little, and sprays in tower
Density is little, causes that mother solution oxidation reaction is insufficient, and transformation time is long, and production capacity is low, and conversion ratio and conversion terminal are wayward,
The low qualified of sodium nitrate product, the acid containing condensation of converter tail gas, the problems such as causing band liquid, emit liquid and superpressure.Patent No.
2009100758210 Chinese patent discloses a kind of " method without stirring producing sodium nitrate through continuous conversion ", the sodium nitrite
Mother solution conversion system is mainly made up of converter, pre-inversion tower, absorption tower, mother liquid tank and supporting pump and pipeline, this
It is bright to realize sodium nitrite and continuously convert production, good effect is achieved, but the patent needs three towers, technique behaviour
Make comparisons complexity, occupation area of equipment is big, and cost of investment is higher, equipment easily receives high temperature acid corrosion, as conversion continuously exists
Carry out in converter, so there are problems that control not precisely, affects to a certain extent by the conversional solution quality of circulation pumped
Sodium nitrate qualification rate.
The content of the invention
It is an object of the invention to provide a kind of method of producing sodium nitrate through continuous conversion, this method substantially increases conversion
Rate, shortens the response time, improves sodium nitrate qualification rate, realizes sodium nitrate serialization automated production, is conducive to expanding
Production capacity, while greatly reduce production cost.
The present invention also provides a kind of equipment of the method for producing sodium nitrate through continuous conversion simultaneously.
The method of described producing sodium nitrate through continuous conversion is comprised the following steps：
(1) pre-inversion：
A, open conversion cycles pump, by circulation fluid by valve regulated get to conversion absorption tower middle part circulation fluid entrance and
Top circulation fluid entrance, and Jing distributors are uniformly distributed liquid；
The mixing mother solution Jing mother liquid flow rate regulating valves of b, sodium nitrite and sodium nitrate are respectively fed to convert the middle part on absorption tower
Mother solution entrance and top mother solution entrance, Jing distributors are uniformly distributed；
C, mix mother solution in the pre-inversion section of top and circulation fluid absorbs the tail gas for coming inverting absorption tower bottom in filler
The reverse contact of layer carries out pre-inversion reaction, and the nitric acid carried secretly in washing tail gas and sodium nitrate；
(2) transformation stage：
D, dust technology deliver to dust technology entrance Jing in the middle part of conversion absorption tower through dust technology regulating valve and dust technology effusion meter
Distributor in the tower spray and under, carry out conversion reaction with mother solution and circulation fluid mix on filler surface, conversional solution is flowed into and is converted
Tower bottom hopper is absorbed, an inverted circulating pump part is back to conversion absorption tower, and the qualified conversional solution of another part is squeezed into and turned
After change device dust technology and alkali liquor are finely adjusted, evaporization process production sodium nitrate is sent into.
A kind of method of described producing sodium nitrate through continuous conversion, it is further comprising the steps of：
(3) the separate absorbent stage：
The tail gas Jing offgas outlets produced in e, conversion process are separated into absorbing separator, and tail gas enters 4# alkali adsorption towers
Absorb, after condensed fluid is separated, Jing condensate outlets flow out return conversion absorption tower.
The tail gas of the next inverting absorption tower bottom described in step c has two sources：The tail gas that converter is produced is through turning
The offgas outlet for changing device is discharged, and enters conversion absorption tower by gas inlet；Tail gas from nitration mixture tower is through nitration mixture gas inlet
Into conversion absorption tower.
Temperature control is at 90～100 DEG C in the described pre-inversion and transformation stage conversion absorption tower, operating pressure
For 0.03～0.04Mpa.
Dust technology mass concentration described in step d is 30～40%.
Preferably, the dust technology mass concentration described in step d is 35%.
Alkali liquor described in step d is sodium carbonate liquor, and alkali liquor mass concentration is 10～20%.
Preferably, the alkali liquor mass concentration described in step d is 15%.
The equipment of the described method for realizing producing sodium nitrate through continuous conversion, including conversion absorption tower, converter and absorption
Separator, described conversion absorption tower are packed tower, including top pre-inversion section, middle part conversion absorber portion and bottom reservoir
Groove；The pre-inversion section on described conversion absorption tower is provided with top mother solution entrance and top circulation fluid entrance, middle part conversion absorber portion
Middle part mother solution entrance, middle part circulation fluid entrance and dust technology entrance is provided with, bottom hopper is provided with conversional solution outlet, and tail gas enters
Mouthful, nitration mixture gas inlet, condensate inlet；The conversional solution entrance and top circulation fluid of described conversional solution outlet connection converter
Entrance, middle part circulation fluid entrance, described gas inlet connect the offgas outlet of converter, described condensate inlet and absorption
The condensate outlet connection of separator, is provided with offgas outlet at the top of conversion absorption tower and is connected with absorbing separator gas inlet.
Described hopper is provided with heating tube.
Compared with prior art the invention has the beneficial effects as follows：
The present invention only set one conversion absorb tower, optimize technological operation, save floor space, reduce pump and
The components such as pipeline, reduce investment cost；Present invention conversion absorption tower point top pre-inversion section, middle part conversion absorber portion, bottom
Liquid storing section, it is ensured that mother solution is fully oxidized, substantially increases conversion ratio, shortens the response time, improves sodium nitrate qualification rate,
Sodium nitrate serialization automated production is realized, is conducive to expanding production capacity.
The present invention passes through dust technology effusion meter and dust technology governor valve control converts pH value in absorption tower, by mother liquid flow rate
Liquid level in governor valve control conversion absorption tower, realizes sodium nitrate continuous prodution, is conducive to Automated condtrol, expanding production energy
Power.
The two sections of circulations of conversional solution circulation fluid, promote the nitrogen oxide gas for dissolving in a liquid to discharge in time；Carry out inverting suction
The tail gas of tower bottom is received Jing after the pre-inversion section washing of top, absorbing separator is entered back into and is further separated, carry secretly in removing tail gas
Condensation acid, solve the problems, such as tail gas carrying liquid affect postorder Alkali absorption effect.
Within battery limit is out obtained tail gas to the nitration mixture top of tower for preparing finite concentration dust technology by the present invention, inverting with next
A small amount of NO of deviceXGas Jing exhaust pipes are respectively fed to conversion and absorb tower bottom, and one side tail gas is entered from bottom and is sufficiently stirred for
Circulation fluid, the NO gases accelerated in liquid are discharged in time, are accelerated conversion reaction speed, have on the other hand fully been recycled tail
Gas produces sodium nitrate, reduces environmental pollution；The tail gas that conversion absorption tower produces Jing after absorbing separator separation is sent into 4# alkali and is inhaled
Receive tower to absorb for producing sodium nitrite, realize energy-saving and emission-reduction.
Conversion is provided with converter behind absorption tower, the conversional solution quality that come inverting absorption tower further can be finely tuned, with essence
Quasi- control conversional solution quality, improves nitre sodium qualification rate.
As in existing conversion absorption tower, operating temperature is more than 80 DEG C, if there is peracid situation and can accelerate to set in solution in tower
Standby corrosion, so for avoiding the occurrence of peracid situation in whole pre-conversion process, in alkalescence, pH setting values are 8 to the control of bottom of towe solution
～9, beyond setting value when acid adding regulating valve be automatically switched off, stop the acid adding into absorption tower.
Conversion absorbs tower bottom hopper heating tube, can be passed through saturated vapor to adjust solution temperature.
This invention ensures that mother solution is fully oxidized, greatly reduce transformation time, transformation time is shortened by original 50min
Within for 10min, conversion ratio is improve, sodium nitrate yield can flexibly be improved according to production requirement, its yield is relative to original
Technique can improve 2～3 times.
Description of the drawings
Fig. 1 is a kind of equipment of the method for realizing producing sodium nitrate through continuous conversion.
Wherein, 1, converter；2nd, conversion cycles pump；3rd, conversional solution outlet；4th, gas inlet；5th, middle part circulation fluid entrance；
6th, middle part mother solution entrance；7th, top circulation fluid entrance；8th, top mother solution entrance；9th, offgas outlet；10th, dust technology effusion meter；11、
Dust technology regulating valve；12nd, convert absorption tower；13rd, distributor；14th, pre-inversion section；15th, dust technology entrance；16th, convert absorber portion；
17th, nitration mixture gas inlet；18th, condensate inlet；19th, hopper；20th, the offgas outlet of converter；21st, conversional solution entrance；22、
Mother liquid flow rate regulating valve；23rd, absorbing separator；24th, absorbing separator gas inlet；25th, condensate outlet.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the invention will be further described.
Embodiment 1
A kind of equipment of the method for realizing producing sodium nitrate through continuous conversion, including conversion absorption tower 12, converter 1 and absorption
Separator 23, described conversion absorption tower 12 are packed tower, including top pre-inversion section 14, middle part conversion absorber portion 16 and under
Portion's hopper 19；The pre-inversion section 14 on described conversion absorption tower 12 is provided with top mother solution entrance 8 and top circulation fluid entrance 7,
Middle part conversion absorber portion 16 is provided with middle part mother solution entrance 6, middle part circulation fluid entrance 5 and dust technology entrance 15, bottom hopper
19 are provided with conversional solution outlet 3, gas inlet 4, nitration mixture gas inlet 17, condensate inlet 18；Described conversional solution outlet 3 connects
The conversional solution entrance 21 of converter 1 and top circulation fluid entrance 7, middle part circulation fluid entrance 5, the described connection of gas inlet 4 turns
Change the offgas outlet 20 of device, described condensate inlet 18 is connected with the condensate outlet 25 of absorbing separator 23, conversion absorbs
It is provided with offgas outlet 9 to be connected with absorbing separator gas inlet 24 at the top of tower 12, described hopper 19 is provided with heating tube.
Embodiment 2
1st, a kind of method of producing sodium nitrate through continuous conversion, comprises the following steps：
(1) pre-inversion：
A, unlatching conversion cycles pump 2, circulation fluid is entered by the middle part circulation fluid that valve regulated gets to conversion absorption tower 12
Mouthfuls 5 and top circulation fluid entrance 7, and Jing distributors 13 are uniformly distributed liquid；
The mixing mother solution Jing mother liquid flow rates regulating valve 22 of b, sodium nitrite and sodium nitrate is respectively fed to convert absorption tower 12
Middle part mother solution entrance 6 and top mother solution entrance 8, Jing distributors 13 are uniformly distributed；
C, mixing mother solution and circulation fluid absorb and carry out the tail gas of 12 bottom of inverting absorption tower and exist in the top pre-inversion section 14
Inversely contact carries out pre-inversion reaction to packing layer, and the nitric acid carried secretly in washing tail gas and sodium nitrate；
(2) transformation stage：
D, dust technology deliver to conversion 12 middle part dust technology of absorption tower through dust technology regulating valve 11 and dust technology effusion meter 10
15 Jing distributors 13 of entrance in the tower spray and under, carry out conversion reaction with mother solution and circulation fluid mix on filler surface, conversion
Liquid flows into conversion 12 bottom hopper 19 of absorption tower, and 2 part of inverted circulating pump is back to conversion absorption tower 12, another part
After qualified conversional solution squeezes into the dust technology of converter 1 and alkali liquor is finely adjusted, evaporization process production sodium nitrate is sent into.
Embodiment 3
1st, it is a kind of the method for producing sodium nitrate through continuous conversion (conversion absorption tower temperature is 90 DEG C, and pressure is 0.03Mpa), bag
Include following steps：
(1) pre-inversion：
A, unlatching conversion cycles pump 2, circulation fluid is entered by the middle part circulation fluid that valve regulated gets to conversion absorption tower 12
Mouthfuls 5 and top circulation fluid entrance 7, and Jing distributors 13 are uniformly distributed liquid；
The mixing mother solution Jing mother liquid flow rates regulating valve 22 of b, sodium nitrite and sodium nitrate is respectively fed to convert absorption tower 12
Middle part mother solution entrance 6 and top mother solution entrance 8, Jing distributors 13 are uniformly distributed；
C, mixing mother solution and circulation fluid absorb and carry out the tail gas of 12 bottom of inverting absorption tower and exist in the top pre-inversion section 14
Inversely contact carries out pre-inversion reaction to packing layer, and the nitric acid carried secretly in washing tail gas and sodium nitrate；
(2) transformation stage：
D, mass concentration are that 30% dust technology delivers to conversion suction through dust technology regulating valve 11 and dust technology effusion meter 10
Receive 12 middle part dust technology entrance of tower, 15 Jing distributors 13 in the tower spray and under, enter on filler surface with mother solution and circulation fluid is mixed
Row conversion reaction, conversional solution flow into conversion 12 bottom hopper 19 of absorption tower, and 2 part of inverted circulating pump is back to conversion and inhales
Tower 12 is received, it is 10% that the qualified conversional solution of another part squeezes into the dust technology that the mass concentration of converter 1 is 30% and mass concentration
After sodium carbonate is finely adjusted, evaporization process production sodium nitrate is sent into；
(3) the separate absorbent stage：
The tail gas Jing offgas outlets 9 produced in e, conversion process are separated into absorbing separator 23, and tail gas is inhaled into 4# alkali
Receive tower to absorb, after condensed fluid is separated, Jing condensate outlets 25 flow out return conversion absorption tower 12.
Embodiment 4
It is 1st, a kind of the method for producing sodium nitrate through continuous conversion (conversion absorption tower temperature is 95 DEG C, and pressure is 0.035Mpa),
Comprise the following steps：
(1) pre-inversion：
A, unlatching conversion cycles pump 2, circulation fluid is entered by the middle part circulation fluid that valve regulated gets to conversion absorption tower 12
Mouthfuls 5 and top circulation fluid entrance 7, and Jing distributors 13 are uniformly distributed liquid；
The mixing mother solution Jing mother liquid flow rates regulating valve 22 of b, sodium nitrite and sodium nitrate is respectively fed to convert absorption tower 12
Middle part mother solution entrance 6 and top mother solution entrance 8, Jing distributors 13 are uniformly distributed；
C, mixing mother solution and circulation fluid absorb and carry out the tail gas of 12 bottom of inverting absorption tower and exist in the top pre-inversion section 14
Inversely contact carries out pre-inversion reaction to packing layer, and the nitric acid carried secretly in washing tail gas and sodium nitrate；
(2) transformation stage：
D, mass concentration are that 35% dust technology delivers to conversion suction through dust technology regulating valve 11 and dust technology effusion meter 10
Receive 12 middle part dust technology entrance of tower, 15 Jing distributors 13 in the tower spray and under, enter on filler surface with mother solution and circulation fluid is mixed
Row conversion reaction, conversional solution flow into conversion 12 bottom hopper 19 of absorption tower, and 2 part of inverted circulating pump is back to conversion and inhales
Tower 12 is received, it is 15% that the qualified conversional solution of another part squeezes into the dust technology that the mass concentration of converter 1 is 35% and mass concentration
After sodium carbonate is finely adjusted, evaporization process production sodium nitrate is sent into；
(3) the separate absorbent stage：
The tail gas Jing offgas outlets 9 produced in e, conversion process are separated into absorbing separator 23, and tail gas is inhaled into 4# alkali
Receive tower to absorb, after condensed fluid is separated, Jing condensate outlets 25 flow out return conversion absorption tower 12.
Embodiment 5
It is 1st, a kind of the method for producing sodium nitrate through continuous conversion (conversion absorption tower temperature is 100 DEG C, and pressure is 0.04Mpa),
Comprise the following steps：
(1) pre-inversion：
A, unlatching conversion cycles pump 2, circulation fluid is entered by the middle part circulation fluid that valve regulated gets to conversion absorption tower 12
Mouthfuls 5 and top circulation fluid entrance 7, and Jing distributors 13 are uniformly distributed liquid；
The mixing mother solution Jing mother liquid flow rates regulating valve 22 of b, sodium nitrite and sodium nitrate is respectively fed to convert absorption tower 12
Middle part mother solution entrance 6 and top mother solution entrance 8, Jing distributors 13 are uniformly distributed；
C, mixing mother solution and circulation fluid absorb and carry out the tail gas of 12 bottom of inverting absorption tower and exist in the top pre-inversion section 14
Inversely contact carries out pre-inversion reaction to packing layer, and the nitric acid carried secretly in washing tail gas and sodium nitrate；
(2) transformation stage：
D, mass concentration are that 40% dust technology delivers to conversion suction through dust technology regulating valve 11 and dust technology effusion meter 10
Receive 12 middle part dust technology entrance of tower, 15 Jing distributors 13 in the tower spray and under, enter on filler surface with mother solution and circulation fluid is mixed
Row conversion reaction, conversional solution flow into conversion 12 bottom hopper 19 of absorption tower, and 2 part of inverted circulating pump is back to conversion and inhales
Tower 12 is received, it is 20% that the qualified conversional solution of another part squeezes into the dust technology that the mass concentration of converter 1 is 40% and mass concentration
After sodium carbonate is finely adjusted, evaporization process production sodium nitrate is sent into；
(3) the separate absorbent stage：
The tail gas Jing offgas outlets 9 produced in e, conversion process are separated into absorbing separator 23, and tail gas is inhaled into 4# alkali
Receive tower to absorb, after condensed fluid is separated, Jing condensate outlets 25 flow out return conversion absorption tower 12.
Claims (10)
1. a kind of method of producing sodium nitrate through continuous conversion, it is characterised in that comprise the following steps：
(1) pre-inversion：
A, unlatching conversion cycles pump (2), circulation fluid is entered by the middle part circulation fluid that valve regulated gets to conversion absorption tower (12)
Mouth (5) and top circulation fluid entrance (7), and Jing distributors (13) are uniformly distributed liquid；
Mixing mother solution Jing mother liquid flow rate regulating valves (22) of b, sodium nitrite and sodium nitrate is respectively fed to convert absorption tower (12)
Middle part mother solution entrance (6) and top mother solution entrance (8), Jing distributors (13) are uniformly distributed；
C, the tail gas for absorbing next inverting absorption tower (12) bottom in the interior mixing mother solution in top pre-inversion section (14) and circulation fluid exist
Inversely contact carries out pre-inversion reaction to packing layer, and the nitric acid carried secretly in washing tail gas and sodium nitrate；
(2) transformation stage：
D, dust technology deliver to dilute nitre in the middle part of conversion absorption tower (12) through dust technology regulating valve (11) and dust technology effusion meter (10)
Sour entrance (15) Jing distributors (13) in the tower spray and under, carry out converting instead on filler surface with mother solution and circulation fluid mix
Should, conversional solution flows into conversion absorption tower (12) bottom hopper (19), and inverted circulating pump (2) part is back to conversion and absorbs
Tower (12), the qualified conversional solution of another part are squeezed into after converter (1) is finely adjusted with dust technology and alkali liquor, send into evaporization process life
Produce sodium nitrate.
2. the method for a kind of producing sodium nitrate through continuous conversion according to claim 1, it is characterised in that also including following step
Suddenly：
(3) the separate absorbent stage：
Tail gas Jing offgas outlets (9) produced in e, conversion process is separated into absorbing separator (23), and tail gas is inhaled into 4# alkali
Receive tower to absorb, after condensed fluid is separated, Jing condensate outlets (25) flow out return conversion absorption tower (12).
3. a kind of method of producing sodium nitrate through continuous conversion according to claim 2, it is characterised in that coming described in step c
The tail gas of inverting absorption tower (12) bottom has two sources：Offgas outlet of the tail gas that converter (1) is produced through converter
(20) discharge, conversion absorption tower (12) is entered by gas inlet (4)；Tail gas from nitration mixture tower is through nitration mixture gas inlet (17)
Into conversion absorption tower (12).
4. the method for a kind of producing sodium nitrate through continuous conversion according to claim 3, it is characterised in that：In described prerotation
, at 90～100 DEG C, operating pressure is 0.03～0.04Mpa for change stage and transformation stage conversion absorption tower (12) interior temperature control.
5. the method for a kind of producing sodium nitrate through continuous conversion according to claim 1, it is characterised in that：Described in step d
Dust technology mass concentration is 30～40%.
6. the method for a kind of producing sodium nitrate through continuous conversion according to claim 5, it is characterised in that：Described in step d
Dust technology mass concentration is 35%.
7. the method for a kind of producing sodium nitrate through continuous conversion according to claim 6, it is characterised in that：Described in step d
Alkali liquor is sodium carbonate liquor, and alkali liquor mass concentration is 10～20%.
8. the method for a kind of producing sodium nitrate through continuous conversion according to claim 7, it is characterised in that：Described in step d
Alkali liquor mass concentration is 15%.
9. a kind of equipment of the method for realizing producing sodium nitrate through continuous conversion, including conversion absorption tower (12), converter (1) and inhales
Receive separator (23), it is characterised in that：Described conversion absorption tower (12) be packed tower, including top pre-inversion section (14), in
Portion's conversion absorber portion (16) and bottom hopper (19)；The pre-inversion section (14) on described conversion absorption tower (12) is provided with top
Mother solution entrance (8) and top circulation fluid entrance (7), middle part conversion absorber portion (16) are provided with middle part mother solution entrance (6), middle part circulation
Liquid entrance (5) and dust technology entrance (15), bottom hopper (19) are provided with conversional solution outlet (3), gas inlet (4), nitration mixture
Gas inlet (17), condensate inlet (18)；The conversional solution entrance (21) of described conversional solution outlet (3) connection converter (1)
With middle part circulation fluid entrance (5), top circulation fluid entrance (7), described gas inlet (4) connects the offgas outlet of converter
(20), described condensate inlet (18) is connected with the condensate outlet (25) of absorbing separator (23), is converted absorption tower (12)
Top is provided with offgas outlet (9) and is connected with absorbing separator gas inlet (24).
10. the equipment of a kind of method for realizing producing sodium nitrate through continuous conversion according to claim 9, it is characterised in that：
Described hopper (19) is provided with heating tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510641667.4A CN105236451B (en) | 2015-09-30 | 2015-09-30 | Method and apparatus for continuous conversion production of sodium nitrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510641667.4A CN105236451B (en) | 2015-09-30 | 2015-09-30 | Method and apparatus for continuous conversion production of sodium nitrate |
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| CN105236451B true CN105236451B (en) | 2017-03-22 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106698483B (en) * | 2017-01-19 | 2018-09-21 | 青海盐湖工业股份有限公司 | A method of producing fused salt grade sodium nitrate |
| CN108380018B (en) * | 2018-03-05 | 2020-04-03 | 西陇科学股份有限公司 | Nitrogen oxide absorption device and method for realizing absorption product separation by using same |
| CN108654532A (en) * | 2018-03-07 | 2018-10-16 | 临沂鲁光化工集团有限公司 | The device and technique of two sodium conversion production sodium nitrate |
| CN115155287A (en) * | 2022-06-16 | 2022-10-11 | 西安明时工程技术有限责任公司 | Process for improving gas conversion efficiency in sodium sulfate production device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4574075A (en) * | 1984-12-06 | 1986-03-04 | Olin Corporation | Purification of alkali metal nitrates |
| CN101696024A (en) * | 2009-10-30 | 2010-04-21 | 石家庄凤山化工有限公司 | Stirring-free method and device for producing sodium nitrate through continuous conversion |
-
2015
- 2015-09-30 CN CN201510641667.4A patent/CN105236451B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4574075A (en) * | 1984-12-06 | 1986-03-04 | Olin Corporation | Purification of alkali metal nitrates |
| CN101696024A (en) * | 2009-10-30 | 2010-04-21 | 石家庄凤山化工有限公司 | Stirring-free method and device for producing sodium nitrate through continuous conversion |
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