CN105236451A - 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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- CN105236451A CN105236451A CN201510641667.4A CN201510641667A CN105236451A CN 105236451 A CN105236451 A CN 105236451A CN 201510641667 A CN201510641667 A CN 201510641667A CN 105236451 A CN105236451 A CN 105236451A
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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, belong to inorganic chemical product production technical field.
Background technology
In modern industry is produced, the general Sodium Nitrite mother liquor that adopts transforms (also crying nitrated) method production SODIUMNITRATE.Main process is: the oxynitride that ammonia oxidation produces absorbs after heat through waste heat boiler and directly enters Alkali absorption tower, produces stock liquid and obtains SODIUMNITRATE and Sodium Nitrite mixing solutions, obtains Sodium Nitrite through pervaporation, crystallization and the process such as to be separated; Sodium Nitrite is converted into SODIUMNITRATE through conversion process by Sodium Nitrite mother liquor.The reaction formula that Sodium Nitrite mother liquor transforms is
:
3NaNO
2+2HNO
3＝3NaNO
3+2NO+H
2O
The conversion of Sodium Nitrite mother liquor is the master operation of production SODIUMNITRATE, and process mother liquor Sodium Nitrite being added nitric acid oxidation production SODIUMNITRATE is called conversion.The mixed solution flow that traditional interval conversion system enters converter is little, and specific liquid rate is little in tower, cause mother liquor oxidizing reaction insufficient, transformation time is long, throughput is low, transformation efficiency and inversion end-point wayward, the low qualified of SODIUMNITRATE product, converter tail gas, containing condensation acid, causes band liquid, emits the problem such as liquid and superpressure.The patent No. be 2009100758210 Chinese patent disclose one " without stirring the method for producing sodium nitrate through continuous conversion ", this Sodium Nitrite mother liquor conversion system is primarily of converter, pre-inversion tower, absorption tower, mother liquid tank and supporting pump and pipeline composition, this invention achieves Sodium Nitrite and transforms production continuously, achieve good effect, but this patent needs three towers, technological operation more complicated, occupation area of equipment is large, cost of investment is higher, equipment easily corrodes by high-temperature acid, carry out in converter continuously owing to transforming, so the conversion fluid quality of being extracted out by recycle pump exists control not precisely problem, affect SODIUMNITRATE qualification rate to a certain extent.
Summary of the invention
The object of the present invention is to provide a kind of method of producing sodium nitrate through continuous conversion, present method substantially increases transformation efficiency, shortens the reaction times, improve SODIUMNITRATE qualification rate, achieve SODIUMNITRATE serialization automatic production, be conducive to expanding production capacity, greatly reduce production cost simultaneously.
The present invention also provides a kind of equipment of method of producing sodium nitrate through continuous conversion simultaneously.
The method of described producing sodium nitrate through continuous conversion comprises the following steps:
(1) pre-inversion:
A, unlatching conversion cycles pump, got to the middle part circulation fluid entrance and top circulation fluid entrance that transform absorption tower, and be uniformly distributed liquid through sparger by valve regulated by circulation fluid;
The mixing mother liquor of b, Sodium Nitrite and SODIUMNITRATE sends into the middle part mother liquor entrance and top mother liquor entrance that transform absorption tower respectively through mother liquid flow rate variable valve, be uniformly distributed through sparger;
C, the tail gas mixed in the pre-inversion section of top bottom mother liquor and the next inverting absorption tower of circulation fluid absorption carry out pre-inversion reaction in the reverse contact of packing layer, and wash the nitric acid and SODIUMNITRATE carried secretly in tail gas;
(2) transformation stage:
D, dust technology through dust technology variable valve and dust technology under meter deliver to transform in the middle part of absorption tower dust technology entrance through sparger spray in tower and under, with mix mother liquor and circulation fluid carries out conversion reaction at filling surface, conversion fluid flows into and transforms stationary tank bottom absorption tower, be back to through a conversion cycles pump part and transform absorption tower, the qualified conversion fluid of another part is squeezed into after convertor dust technology and alkali lye finely tunes, and sends into evaporization process production SODIUMNITRATE.
The method of described a kind of producing sodium nitrate through continuous conversion, further comprising the steps of:
(3) the separate absorbent stage:
The tail gas produced in e, conversion process enters absorbing separator through offgas outlet and is separated, and tail gas enters 4# Alkali absorption tower and absorbs, and flows out to return to transform absorption tower after phlegma is separated through condensate outlet.
Tail gas bottom next inverting absorption tower described in step c has two sources: the tail gas that convertor produces is discharged through the offgas outlet of convertor, is entered transform absorption tower by gas inlet; Tail gas from nitration mixture tower enters conversion absorption tower through nitration mixture gas inlet.
Transforming temperature in absorption tower at described pre-inversion and transformation stage controls at 90 ~ 100 DEG C, and working pressure is 0.03 ~ 0.04Mpa.
Dust technology mass concentration described in steps d is 30 ~ 40%.
Preferably, the dust technology mass concentration described in steps d is 35%.
Alkali lye described in steps d is sodium carbonate solution, and alkali lye mass concentration is 10 ~ 20%.
Preferably, the alkali lye mass concentration described in steps d is 15%.
The described equipment realizing the method for producing sodium nitrate through continuous conversion, comprise and transform absorption tower, convertor and absorbing separator, described conversion absorption tower is packing tower, comprises top pre-inversion section, middle part transforms absorber portion and bottom stationary tank; The pre-inversion section on described conversion absorption tower is provided with top mother liquor entrance and top circulation fluid entrance, and middle part transforms absorber portion and is provided with middle part mother liquor entrance, middle part circulation fluid entrance and dust technology entrance, bottom stationary tank is provided with conversion fluid outlet, gas inlet, nitration mixture gas inlet, condensate inlet; Described conversion fluid outlet connects conversion fluid entrance and top circulation fluid entrance, the middle part circulation fluid entrance of convertor, described gas inlet connects the offgas outlet of convertor, described condensate inlet is connected with the condensate outlet of absorbing separator, and conversion top, absorption tower is provided with offgas outlet and is connected with absorbing separator gas inlet.
Described stationary tank is provided with heating tube.
Compared with prior art the invention has the beneficial effects as follows:
The present invention only establishes one to transform absorption tower equipment, optimizes technological operation, saves floor space, decrease the assembly such as pump and pipeline, reduce investment cost; The present invention transforms absorption tower point top pre-inversion section, middle part transforms absorber portion, bottom liquid storing section, ensure that mother liquor is fully oxidized, substantially increases transformation efficiency, shorten the reaction times, improve SODIUMNITRATE qualification rate, achieve SODIUMNITRATE serialization automatic production, be conducive to expanding production capacity.
The present invention transforms pH value in absorption tower by dust technology under meter and dust technology governor valve control, transforms liquid level in absorption tower, achieve SODIUMNITRATE continuous prodution, be conducive to Automated condtrol, expand production capacity by mother liquid flow rate governor valve control.
Conversion fluid circulation fluid two sections circulation, impels dissolving nitrogen oxide gas in a liquid to discharge in time; Carry out tail gas bottom inverting absorption tower after the washing of top pre-inversion section, then enter absorbing separator and be separated further, the condensation acid of carrying secretly in removing tail gas, solves the problem that tail gas carrying liquid affects postorder Alkali absorption effect.
Within battery limit is out obtained tail gas, with a small amount of NO from convertor in order to the nitration mixture top of tower preparing finite concentration dust technology by the present invention
xgas is sent into respectively through exhaust pipe and is transformed bottom absorption tower, tail gas enters abundant agitation cycle liquid from bottom on the one hand, and the NO gas accelerated in liquid is discharged in time, accelerates conversion reaction speed, fully recycle End gas production SODIUMNITRATE on the other hand, decrease environmental pollution; The tail gas transforming absorption tower generation sends into the absorption of 4# Alkali absorption tower for the production of Sodium Nitrite after absorbing separator is separated, and achieves energy-saving and emission-reduction.
Be provided with convertor after transforming absorption tower, can the conversion fluid quality coming inverting absorption tower be finely tuned further, precisely to control conversion fluid quality, improve nitre sodium qualification rate.
Because in existing conversion absorption tower, working temperature is greater than 80 DEG C, if solution occurs that peracid situation can accelerate equipment corrosion in tower, so there is peracid situation for avoiding in whole pre-conversion process, solution at the bottom of tower controls in alkalescence, pH set(ting)value is 8 ~ 9, when exceeding set(ting)value, acid adding variable valve cuts out automatically, stops acid adding in absorption tower.
Bottom transforming absorption tower, stationary tank has heating tube, can pass into saturation steam and carry out regulator solution temperature.
This invention ensures that mother liquor is fully oxidized, greatly reduce transformation time, transformation time improves transformation efficiency within shortening to 10min by original 50min, can improve SODIUMNITRATE output flexibly according to production requirement, its output can improve 2 ~ 3 times relative to original technique.
Accompanying drawing explanation
Fig. 1 is a kind of equipment realizing the method for producing sodium nitrate through continuous conversion.
Wherein, 1, convertor; 2, conversion cycles pump; 3, conversion fluid outlet; 4, gas inlet; 5, middle part circulation fluid entrance; 6, middle part mother liquor entrance; 7, top circulation fluid entrance; 8, top mother liquor entrance; 9, offgas outlet; 10, dust technology under meter; 11, dust technology variable valve; 12, absorption tower is transformed; 13, sparger; 14, pre-inversion section; 15, dust technology entrance; 16, absorber portion is transformed; 17, nitration mixture gas inlet; 18, condensate inlet; 19, stationary tank; 20, the offgas outlet of convertor; 21, conversion fluid entrance; 22, mother liquid flow rate variable valve; 23, absorbing separator; 24, absorbing separator gas inlet; 25, condensate outlet.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
Embodiment 1
A kind of equipment realizing the method for producing sodium nitrate through continuous conversion, comprise and transform absorption tower 12, convertor 1 and absorbing separator 23, described conversion absorption tower 12 is packing tower, comprises top pre-inversion section 14, middle part transforms absorber portion 16 and bottom stationary tank 19; The pre-inversion section 14 on described conversion absorption tower 12 is provided with top mother liquor entrance 8 and top circulation fluid entrance 7, middle part transforms absorber portion 16 and is provided with middle part mother liquor entrance 6, middle part circulation fluid entrance 5 and dust technology entrance 15, bottom stationary tank 19 is provided with conversion fluid outlet 3, gas inlet 4, nitration mixture gas inlet 17, condensate inlet 18; Described conversion fluid outlet 3 connects conversion fluid entrance 21 and top circulation fluid entrance 7, the middle part circulation fluid entrance 5 of convertor 1, described gas inlet 4 connects the offgas outlet 20 of convertor, described condensate inlet 18 is connected with the condensate outlet 25 of absorbing separator 23, conversion top, absorption tower 12 is provided with offgas outlet 9 and is connected with absorbing separator gas inlet 24, and described stationary tank 19 is provided with heating tube.
Embodiment 2
1, a method for producing sodium nitrate through continuous conversion, comprises the following steps:
(1) pre-inversion:
A, unlatching conversion cycles pump 2, got to the middle part circulation fluid entrance 5 and top circulation fluid entrance 7 that transform absorption tower 12, and be uniformly distributed liquid through sparger 13 by valve regulated by circulation fluid;
The mixing mother liquor of b, Sodium Nitrite and SODIUMNITRATE sends into the middle part mother liquor entrance 6 and top mother liquor entrance 8 that transform absorption tower 12 respectively through mother liquid flow rate variable valve 22, be uniformly distributed through sparger 13;
C, the tail gas mixed in top pre-inversion section 14 bottom mother liquor and the next inverting absorption tower 12 of circulation fluid absorption carry out pre-inversion reaction in the reverse contact of packing layer, and wash the nitric acid and SODIUMNITRATE carried secretly in tail gas;
(2) transformation stage:
D, dust technology through dust technology variable valve 11 and dust technology under meter 10 deliver to transform in the middle part of absorption tower 12 dust technology entrance 15 through sparger 13 spray in tower and under, with mix mother liquor and circulation fluid carries out conversion reaction at filling surface, conversion fluid flows into and transforms stationary tank 19 bottom absorption tower 12, be back to through conversion cycles pump 2 part and transform absorption tower 12, the qualified conversion fluid of another part is squeezed into after convertor 1 dust technology and alkali lye finely tunes, and sends into evaporization process production SODIUMNITRATE.
Embodiment 3
1, a kind of method (transforming absorption tower temperature is 90 DEG C, and pressure is 0.03Mpa) of producing sodium nitrate through continuous conversion, comprises the following steps:
(1) pre-inversion:
A, unlatching conversion cycles pump 2, got to the middle part circulation fluid entrance 5 and top circulation fluid entrance 7 that transform absorption tower 12, and be uniformly distributed liquid through sparger 13 by valve regulated by circulation fluid;
The mixing mother liquor of b, Sodium Nitrite and SODIUMNITRATE sends into the middle part mother liquor entrance 6 and top mother liquor entrance 8 that transform absorption tower 12 respectively through mother liquid flow rate variable valve 22, be uniformly distributed through sparger 13;
C, the tail gas mixed in top pre-inversion section 14 bottom mother liquor and the next inverting absorption tower 12 of circulation fluid absorption carry out pre-inversion reaction in the reverse contact of packing layer, and wash the nitric acid and SODIUMNITRATE carried secretly in tail gas;
(2) transformation stage:
D, mass concentration be 30% dust technology through dust technology variable valve 11 and dust technology under meter 10 deliver to transform in the middle part of absorption tower 12 dust technology entrance 15 through sparger 13 spray in tower and under, with mix mother liquor and circulation fluid carries out conversion reaction at filling surface, conversion fluid flows into and transforms stationary tank 19 bottom absorption tower 12, be back to through conversion cycles pump 2 part and transform absorption tower 12, the qualified conversion fluid of another part squeeze into convertor 1 mass concentration be 30% dust technology and mass concentration be after 10% sodium carbonate is finely tuned, send into evaporization process production SODIUMNITRATE;
(3) the separate absorbent stage:
The tail gas produced in e, conversion process enters absorbing separator 23 through offgas outlet 9 and is separated, and tail gas enters 4# Alkali absorption tower and absorbs, and flows out to return to transform absorption tower 12 after phlegma is separated through condensate outlet 25.
Embodiment 4
1, a kind of method (transforming absorption tower temperature is 95 DEG C, and pressure is 0.035Mpa) of producing sodium nitrate through continuous conversion, comprises the following steps:
(1) pre-inversion:
A, unlatching conversion cycles pump 2, got to the middle part circulation fluid entrance 5 and top circulation fluid entrance 7 that transform absorption tower 12, and be uniformly distributed liquid through sparger 13 by valve regulated by circulation fluid;
The mixing mother liquor of b, Sodium Nitrite and SODIUMNITRATE sends into the middle part mother liquor entrance 6 and top mother liquor entrance 8 that transform absorption tower 12 respectively through mother liquid flow rate variable valve 22, be uniformly distributed through sparger 13;
C, the tail gas mixed in top pre-inversion section 14 bottom mother liquor and the next inverting absorption tower 12 of circulation fluid absorption carry out pre-inversion reaction in the reverse contact of packing layer, and wash the nitric acid and SODIUMNITRATE carried secretly in tail gas;
(2) transformation stage:
D, mass concentration be 35% dust technology through dust technology variable valve 11 and dust technology under meter 10 deliver to transform in the middle part of absorption tower 12 dust technology entrance 15 through sparger 13 spray in tower and under, with mix mother liquor and circulation fluid carries out conversion reaction at filling surface, conversion fluid flows into and transforms stationary tank 19 bottom absorption tower 12, be back to through conversion cycles pump 2 part and transform absorption tower 12, the qualified conversion fluid of another part squeeze into convertor 1 mass concentration be 35% dust technology and mass concentration be after 15% sodium carbonate is finely tuned, send into evaporization process production SODIUMNITRATE;
(3) the separate absorbent stage:
The tail gas produced in e, conversion process enters absorbing separator 23 through offgas outlet 9 and is separated, and tail gas enters 4# Alkali absorption tower and absorbs, and flows out to return to transform absorption tower 12 after phlegma is separated through condensate outlet 25.
Embodiment 5
1, a kind of method (transforming absorption tower temperature is 100 DEG C, and pressure is 0.04Mpa) of producing sodium nitrate through continuous conversion, comprises the following steps:
(1) pre-inversion:
A, unlatching conversion cycles pump 2, got to the middle part circulation fluid entrance 5 and top circulation fluid entrance 7 that transform absorption tower 12, and be uniformly distributed liquid through sparger 13 by valve regulated by circulation fluid;
The mixing mother liquor of b, Sodium Nitrite and SODIUMNITRATE sends into the middle part mother liquor entrance 6 and top mother liquor entrance 8 that transform absorption tower 12 respectively through mother liquid flow rate variable valve 22, be uniformly distributed through sparger 13;
C, the tail gas mixed in top pre-inversion section 14 bottom mother liquor and the next inverting absorption tower 12 of circulation fluid absorption carry out pre-inversion reaction in the reverse contact of packing layer, and wash the nitric acid and SODIUMNITRATE carried secretly in tail gas;
(2) transformation stage:
D, mass concentration be 40% dust technology through dust technology variable valve 11 and dust technology under meter 10 deliver to transform in the middle part of absorption tower 12 dust technology entrance 15 through sparger 13 spray in tower and under, with mix mother liquor and circulation fluid carries out conversion reaction at filling surface, conversion fluid flows into and transforms stationary tank 19 bottom absorption tower 12, be back to through conversion cycles pump 2 part and transform absorption tower 12, the qualified conversion fluid of another part squeeze into convertor 1 mass concentration be 40% dust technology and mass concentration be after 20% sodium carbonate is finely tuned, send into evaporization process production SODIUMNITRATE;
(3) the separate absorbent stage:
The tail gas produced in e, conversion process enters absorbing separator 23 through offgas outlet 9 and is separated, and tail gas enters 4# Alkali absorption tower and absorbs, and flows out to return to transform absorption tower 12 after phlegma is separated through condensate outlet 25.
Claims (10)
1. a method for producing sodium nitrate through continuous conversion, is characterized in that comprising the following steps:
(1) pre-inversion:
A, unlatching conversion cycles pump (2), circulation fluid is got to middle part circulation fluid entrance (5) and top circulation fluid entrance (7) that transform absorption tower (12) by valve regulated, and be uniformly distributed liquid through sparger (13);
The mixing mother liquor of b, Sodium Nitrite and SODIUMNITRATE sends into middle part mother liquor entrance (6) and top mother liquor entrance (8) that transform absorption tower (12) respectively through mother liquid flow rate variable valve (22), be uniformly distributed through sparger (13);
C, the tail gas mixed in top pre-inversion section (14) bottom mother liquor and the next inverting absorption tower (12) of circulation fluid absorption carry out pre-inversion reaction in the reverse contact of packing layer, and wash the nitric acid and SODIUMNITRATE carried secretly in tail gas;
(2) transformation stage:
D, dust technology through dust technology variable valve (11) and dust technology under meter (10) deliver to transform absorption tower (12) middle part dust technology entrance (15) through sparger (13) spray in tower and under, with mix mother liquor and circulation fluid carries out conversion reaction at filling surface, conversion fluid flows into and transforms bottom stationary tank, absorption tower (12) (19), be back to through conversion cycles pump (2) part and transform absorption tower (12), the qualified conversion fluid of another part is squeezed into after convertor (1) dust technology and alkali lye finely tunes, send into evaporization process production SODIUMNITRATE.
2. the method for a kind of producing sodium nitrate through continuous conversion according to claim 1, characterized by further comprising following steps:
(3) the separate absorbent stage:
The tail gas produced in e, conversion process enters absorbing separator (23) through offgas outlet (9) and is separated, tail gas enters 4# Alkali absorption tower and absorbs, and flows out to return to transform absorption tower (12) after phlegma is separated through condensate outlet (25).
3. the method for a kind of producing sodium nitrate through continuous conversion according to claim 2, it is characterized in that the tail gas of the bottom, next inverting absorption tower (12) described in step c has two sources: the tail gas that convertor (1) produces is discharged through the offgas outlet (20) of convertor, is entered transform absorption tower (12) by gas inlet (4); Tail gas from nitration mixture tower enters conversion absorption tower (12) through nitration mixture gas inlet (17).
4. the method for a kind of producing sodium nitrate through continuous conversion according to claim 3, it is characterized in that: transform temperature in absorption tower (12) at described pre-inversion and transformation stage and control at 90 ~ 100 DEG C, working pressure is 0.03 ~ 0.04Mpa.
5. the method for a kind of producing sodium nitrate through continuous conversion according to claim 1, is characterized in that: the dust technology mass concentration described in steps d is 30 ~ 40%.
6. the method for a kind of producing sodium nitrate through continuous conversion according to claim 5, is characterized in that: the dust technology mass concentration described in steps d is 35%.
7. the method for a kind of producing sodium nitrate through continuous conversion according to claim 6, is characterized in that: the alkali lye described in steps d is sodium carbonate solution, and alkali lye mass concentration is 10 ~ 20%.
8. the method for a kind of producing sodium nitrate through continuous conversion according to claim 7, is characterized in that: the alkali lye mass concentration described in steps d is 15%.
9. one kind realizes the equipment of the method for producing sodium nitrate through continuous conversion, comprise and transform absorption tower (12), convertor (1) and absorbing separator (23), it is characterized in that: described conversion absorption tower (12) is packing tower, comprise top pre-inversion section (14), middle part and transform absorber portion (16) and bottom stationary tank (19); The pre-inversion section (14) on described conversion absorption tower (12) is provided with top mother liquor entrance (8) and top circulation fluid entrance (7), middle part transforms absorber portion (16) and is provided with middle part mother liquor entrance (6), middle part circulation fluid entrance (5) and dust technology entrance (15), bottom stationary tank (19) is provided with conversion fluid outlet (3), gas inlet (4), nitration mixture gas inlet (17), condensate inlet (18); Described conversion fluid outlet (3) connects the conversion fluid entrance (21) of convertor (1) and middle part circulation fluid entrance (5), top circulation fluid entrance (7), described gas inlet (4) connects the offgas outlet (20) of convertor, described condensate inlet (18) is connected with the condensate outlet (25) of absorbing separator (23), and conversion absorption tower (12) top is provided with offgas outlet (9) and is connected with absorbing separator gas inlet (24).
10. a kind of equipment realizing the method for producing sodium nitrate through continuous conversion according to claim 9, is characterized in that: described stationary tank (19) is provided with heating tube.
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| 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 |
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| 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 CN105236451B (en) | 2017-03-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106698483A (en) * | 2017-01-19 | 2017-05-24 | 青海盐湖工业股份有限公司 | Method for producing molten salt-grade sodium nitrate |
| CN108380018A (en) * | 2018-03-05 | 2018-08-10 | 西陇科学股份有限公司 | The absorption plant of nitrogen oxides and the method for realizing absorption product separation using the device |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106698483A (en) * | 2017-01-19 | 2017-05-24 | 青海盐湖工业股份有限公司 | Method for producing molten salt-grade sodium nitrate |
| CN108380018A (en) * | 2018-03-05 | 2018-08-10 | 西陇科学股份有限公司 | The absorption plant of nitrogen oxides and the method for realizing absorption product separation using the device |
| 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 |
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