CN106745061B - The method and apparatus that a kind of ammonia alkali, connection alkali industry ammonium chloride directly thermally decompose - Google Patents
The method and apparatus that a kind of ammonia alkali, connection alkali industry ammonium chloride directly thermally decompose Download PDFInfo
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- CN106745061B CN106745061B CN201710103535.5A CN201710103535A CN106745061B CN 106745061 B CN106745061 B CN 106745061B CN 201710103535 A CN201710103535 A CN 201710103535A CN 106745061 B CN106745061 B CN 106745061B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/026—Preparation of ammonia from inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/03—Preparation from chlorides
- C01B7/05—Preparation from ammonium chloride
- C01B7/055—Preparation of hydrogen chloride from ammonium chloride
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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
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention discloses a kind of ammonia alkalis, the method and apparatus that connection alkali industry ammonium chloride directly thermally decomposes, the preheating of air preheat vacuum drying oven is added in ammonium chloride, pass through preheating, the mode of vacuumizing enters dore furnace after removing moisture removal and air, it is decomposed rapidly at 350 DEG C, ammonia is separated by 30-70 ° of inclination of separator, ammonia after decomposition enters Ammonia recovery system from top, hydrogen chloride enters hydrogen chloride collection system by separator lower part, the ammonium chloride solution that the present invention generates ammonia alkali reaction is concentrated, it is purified to chloride solid, directly resolve into ammonia and hydrogen chloride, realize the ammonia of ammonia alkali industry recycles problem, neither generate waste liquid, waste residue；Again successfully recycled hydrogen chloride resource, saved calcium hydroxide resource, it can be achieved that ammonia alkali industry zero-emission Green Development；Not only there is economic benefit, but also there is social effect.
Description
Technical field
The present invention relates to a kind of decomposition method of ammonium chloride more particularly to a kind of ammonia alkali, connection alkali industry ammonium chloride are directly hot
The method and apparatus of decomposition.
Background technique
Ammonium chloride is a kind of quick-acting nitrogen chemical fertilizer, and nitrogen content is 24%~25%, belongs to physiological acidic fertilizer, it is suitable for
The crops such as wheat, rice, corn, rape especially have reinforcing fiber toughness and pulling force to cotton crudefiber crop and improve the function of quality
Effect.But if some bad shadows often are brought to soil and crops since the property of ammonium chloride determines that application is not satisfied the need
It rings, generally all uses ammonium nitrate.Due to joining a large amount of side product sodium chlorides of alkali industry, keen competition is formed with urea, leads to ammonium chloride
Lower than the situation of cost sales.
The end of the year 2014,14,130,000 t of China's ammonia alkali production capacity, every production 1t ammonia alkali will discharge 10m3Waste liquid, wherein solid content
About 3%, 141,300,000 t of waste liquid is at least discharged every year, and 423.9 ten thousand t of waste residue not only pollutes environment, but also waste resource.The end of the year 2014,
China joins 15,890,000 t of alkali production capacity, and 1618.98 ten thousand t of side product sodium chloride, production capacity is seriously superfluous, occurs being lower than the fierceness of cost sales
Disorderly competition situation.
In recent decades, some countries, the world successively decompose ammonium chloride indirectly carried out research work, some progress
Type approval test achieves certain achievement；Such as: magnesium oxide method, manganese oxide method, iron oxide process, sodium bisulfate fusant method, height
Warm adduct process, fusion electrolysis method, lead chloride method.Currently, NH4There are no heavy industrializations in the world for C1 decomposition technique
Using only a small amount of patent and document are to decomposition NH4The technique of C1 proposes some imaginations and has carried out desk study.
Summary of the invention
In order to solve the above technical problems, the ammonium chloride solution that the present invention generates ammonia alkali reaction is concentrated, it is purified to chlorination
Ammonium solid, directly resolves into ammonia and hydrogen chloride, realizes the problem that recycles of the ammonia of ammonia alkali industry, neither generation waste liquid,
Waste residue；Hydrogen chloride resource has successfully been recycled again, has saved calcium hydroxide resource, it can be achieved that the green of ammonia alkali industry zero-emission is sent out
Exhibition.
To reach above-mentioned technical purpose, this invention takes following technical solutions:
A kind of method that ammonia alkali, connection alkali industry ammonium chloride directly thermally decompose, comprising the following steps:
A, the ammonium chloride saturated solution for generating ammonia alkali, send to cooler crystallizer, is cooled to 30~45 DEG C, and satiety is precipitated
The ammonia chloride crystal of sum send crystallizer top ammonium chloride solution to air cooler and is cooled and recycled to crystallizer；Lower part magma warp
It is centrifugated again after thickener thickening, chlorination ammonium product is made；
B, by step a ammonium chloride be added air preheat vacuum drying oven preheating, by preheating, the mode of vacuumizing remove moisture removal and sky
Gas；
C, the ammonium chloride after going moisture removal to vacuumize step b is led to by the revolving plow reclaimer of air preheat vacuum drying oven lower part
It crosses feeding system and enters dore furnace；
D, ammonium chloride decomposes rapidly at 350 DEG C in dore furnace, and ammonia enters Ammonia recovery system by separator top
System, hydrogen chloride enter hydrogen chloride collection system by separator lower part.
The ammonium chloride of step b is evacuated to 1300Pa after being preheated with 110 DEG C of hot-airs.
The present invention also provides a kind of ammonia alkalis, the connection direct pyrolysis device of alkali industry ammonium chloride, including feeding system, heat point
Solution system, separation system, feeding system include air vacuum preheating furnace, and lower part passes through revolving plow reclaimer A connection feed bin, hot-air
Inlet vacuum preheater lower part connects revolving plow reclaimer B under feed bin, and revolving plow reclaimer B is fed cylinder by connecting tube connection annular,
Annular connects revolving plow reclaimer C to barrel lower part to vacuum pump C, annular is equipped on the outside of barrel, and revolving plow reclaimer C passes through feed pipe
It is connect with dore furnace, air vacuum preheating furnace, feed bin and annular are respectively mounted vacuum valve to barrel；Thermal decomposition system is dore furnace,
Filter is housed between separator and dore furnace；Separation system is the separator for tilting 30-70 °, and separator interior is equipped with molecule
Vacuum valve is installed in sieve, separator outside, and both ends fill ball valve connection ammonia and hydrogen chloride collection system, and filter is high temperature plate mistake
Filter, molecular sieve are JMT-1 type zeolite molecular sieve.
Above-mentioned annular is 3 to barrel, and annular is identical as the curvature of dore furnace to the curvature of barrel,
Feeding system is 2, is symmetrically distributed in dore furnace two sides, and the angle of feed pipe and dore furnace is 45 °.
Above-mentioned Membrane Separator Cylinder for CFB Boiler is three-decker, is made of the protective layer in outside, intermediate heating layer and heat-conducting layer；It decomposes
Furnace tube is three-decker, is made of the protective layer in outside, intermediate heating layer and heat-conducting layer.
Air vacuum preheating furnace lower impeller batcher A is 5, is arranged in X-shaped；Feed bin lower impeller batcher B is 3
It is a, it arranges in equilateral triangle, is correspondingly connected with by connecting tube and 3 annular feed pipes；Annular gives barrel lower impeller batcher C
It is 3, fan-shaped arrangement.
Ammonium chloride is heated to starting to decompose at 180 DEG C, and 337.8 DEG C of whens can be completely decomposed into ammonia and hydrogen chloride gas.
Ammonium chloride thermal decomposition be it is feasible, only decompose after ammonia and HCl separation solution never, to the cold after change again
Symphysis is rendered as white dense smoke at the minimum ammonium chloride of particle, is not easy, also pole is not easy to be re-dissolved in water, so leading to chlorine
Changing ammonium thermal decomposition could not industrialization.The present invention is to be protected using the special 30-70 ° of separator of inclination of one kind of oneself invention in temperature
350 DEG C are held, using two kinds of gas density differences of ammonia and hydrogen chloride, and viscosity difference is separated in decomposition temperature.It is marking
When quasi- situation, the density of ammonia is 0.771g/L(25 DEG C)；The density of hydrogen chloride is 1.447g/L(25 DEG C).Two kinds of gas when heated
The density of body becomes smaller simultaneously, but the density of hydrogen chloride is still far greater than ammonia density；And at 338 DEG C, the viscosity of ammonia is
0.015mpas, hydrogen chloride 0.021mpas.According to the essentially identical principle of the molar volume of gas of identical molal quantity, in
Portion forms turbulent area, and the density and viscosity according to two kinds of gas is different, gradually generates layering, this allows for two kinds of gas escape sides
To different, ammonia is discharged from top, and hydrogen chloride is discharged from bottom, is successfully effectively separated two kinds of gases, thus
Ammonium chloride is realized directly to thermally decompose.Successfully define that middle part forms the following of turbulent area using JMT-1 type zeolite molecular sieve
Boundary passes through hydrogen chloride sinking, and ammonia cannot sink to passing through.
The present invention utilizes air preheat vacuum drying oven, the first moisture in removal ammonium chloride, and being then evacuated makes reactant
Become pure, there is no side reaction, then thermally decomposed under vacuum conditions, the ammonia and hydrogen chloride of generation can be directly sharp
With.
Air preheat vacuum furnace bottom batcher A of the present invention is 5, is arranged in X-shaped,；Feed bin lower impeller batcher B is
It 3, arranges in equilateral triangle, is correspondingly connected with by connecting tube and 3 annular feed pipes；Annular gives barrel lower impeller batcher
C is 3, fan-shaped arrangement.
The present invention is successfully realized using air preheat vacuum drying oven, feed bin, annular to barrel, feed pipe, revolving plow reclaimer
Full furnace even feeding gives barrel there are three annular using each under two sets feeding system feed bins, annular to barrel curvature and
The curvature of dore furnace is identical, and annular is to, respectively there are three feed pipe, 9 feed pipes can realize 180 ° of feeds, and dore furnace is every under barrel
Just there is a feed pipe every 20 °, the angle of each feed pipe and dore furnace is 45 °.Air preheat vacuum drying oven, feed bin, annular are given
Barrel, separator are respectively arranged with the external vacuum pump of vacuum valve, realize system vacuum state, and can safe blow-on and blowing out.Feed system
All using revolving plow reclaimer, putty problem is not present in system, and successfully solves and decompose gas from feed pipe anti-channeling problem.It is flat
Board-like high-temperature resistant filter prevents undecomposed flying dust from entering separator.
The ammonium chloride solution for being generated ammonia alkali reaction using the present invention is concentrated, is purified to chloride solid, directly decomposes
At ammonia and hydrogen chloride, the problem that recycles of the ammonia of ammonia alkali industry is realized, neither generation waste liquid, waste residue；It successfully returns again
Received hydrogen chloride resource, saved calcium hydroxide resource, it can be achieved that ammonia alkali industry zero-emission Green Development；Both there is economic effect
Benefit, and there is social effect.
Solves the problems, such as connection alkali industry ammonium chloride lower than cost sales using technical solution of the present invention；Connection alkali industry is expanded production
It can no longer mating ammonia synthesis unit.
Detailed description of the invention
Fig. 1 is a kind of ammonia alkali of the present invention, the structural schematic diagram for joining the direct pyrolysis device of alkali industry ammonium chloride；
Fig. 2 is a kind of ammonia alkali of the present invention, the main view for joining the direct pyrolysis device of alkali industry ammonium chloride；
Fig. 3 is a kind of ammonia alkali of the present invention, the right view for joining the direct pyrolysis device of alkali industry ammonium chloride；
Fig. 4 is a kind of ammonia alkali of the present invention, the top view for joining the direct pyrolysis device of alkali industry ammonium chloride；
Fig. 5 is a kind of ammonia alkali of the present invention, the direct pyrolysis device thermal decomposition system of connection alkali industry ammonium chloride and separation system
Structural schematic diagram；
Wherein 1- air vacuum preheating furnace, 2- charging slide valve, 3- vacuum pump A, 4- revolving plow reclaimer A, 5- hot-air enter
Mouth, 6- vacuum pump B, 7- feed bin, 8- revolving plow reclaimer B, 9- annular are to barrel, 10- vacuum pump C, 11- revolving plow reclaimer C, 12-
Feed pipe, 13- dore furnace, 131- dore furnace protective layer, 132- dore furnace heating layer, 133 dore furnace heat-conducting layers, 134- charging
Mouth, 14- separator, 141- separator thermal insulation layer, 142- separator heating layer, 143- separator heat-conducting layer, 15- bracket, 16- mistake
Filter, 17- molecular sieve, 18- vacuum pump D, 19- ball valve, 20- connecting tube.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing, to realize that ammonium chloride directly thermally decomposes, using following steps:
A, the ammonium chloride saturated solution for generating ammonia alkali, send to cooler crystallizer, is cooled to 30~45 DEG C, and satiety is precipitated
The ammonia chloride crystal of sum send crystallizer top ammonium chloride solution to air cooler and is cooled and recycled to crystallizer；Lower part magma warp
It is centrifugated again after thickener thickening, chlorination ammonium product is made；
B, by step 1) ammonium chloride be added air preheat vacuum drying oven 1, by preheating, the mode of vacuumizing remove moisture removal and sky
Gas；
C, the ammonium chloride after going moisture removal to vacuumize step 2 passes through the revolving plow reclaimer of 1 lower part of air preheat vacuum drying oven
4 enter dore furnace 13 by feeding system；
D, ammonium chloride decomposes rapidly at 350 DEG C in dore furnace 13, and ammonia enters Ammonia recovery by 14 top of separator
System, hydrogen chloride enter hydrogen chloride collection system by 14 lower part of separator.
The ammonium chloride of step b is evacuated to 1300Pa after being preheated with 110 DEG C of hot-airs.
The direct pyrolysis device of ammonium chloride, including feeding system, thermal decomposition system, separation system, feeding system include sky
Gas vacuum preheating furnace 1,1 lower part of air vacuum preheating furnace is by revolving plow reclaimer A4 connection feed bin 7, and hot air inlet 5 is in vacuum
1 lower part of preheating furnace, feed bin 7 lower connection revolving plow reclaimer B 8, revolving plow reclaimer B 8 connect annular feed cylinder by connecting tube 20
9, annular connects revolving plow reclaimer C11, revolving plow reclaimer C11 to 9 lower part of barrel to vacuum valve C10, annular is equipped on the outside of barrel 9
It is connect by feed pipe 12 with dore furnace 13, equipped with installation vacuum valve B6 outside vacuum valve C3, feed bin 7 outside air vacuum preheating furnace 1；
Thermal decomposition system is dore furnace 13, and filter 16 is housed between dore furnace 13 and separator 14；Separation system is 30-70 ° of inclination
Separator 14, molecular sieve 17 is equipped with inside separator 14, vacuum valve 19 is installed outside separator 14, both ends fill ball valve 20 and connect ammonia
Gas and hydrogen chloride collection system, filter 16 are high temperature flat-panel filter, and molecular sieve 17 is JMT-1 type zeolite molecular sieve.
Above-mentioned annular is 3 to barrel 9, and annular is identical as the curvature of dore furnace 13 to the curvature of barrel 9,
Feeding system is 2 sets, is symmetrically distributed in 13 two sides of dore furnace, feed pipe 12 and the angle of dore furnace 13 are 45 °
13 cylinder of dore furnace is three-decker, by the protective layer 131 in outside, intermediate heating layer 132 and 133 groups of heat-conducting layer
At；14 cylinder of separator is three-decker, is made of the protective layer 141 in outside, intermediate heating layer 142 and heat-conducting layer 143.
1 lower impeller batcher A4 of air vacuum preheating furnace is 5, is arranged in X-shaped；7 lower impeller batcher B8 of feed bin
It is 3, arranges in equilateral triangle, be correspondingly connected with by connecting tube 20 and 3 annular to barrel 9；Annular gives 9 lower impeller of barrel
Batcher C11 is 3, fan-shaped arrangement.
In specific production process, the ammonium chloride saturated solution that ammonia alkali is generated is sent to cooler crystallizer, it is cooled to 30~
45 DEG C, oversaturated ammonia chloride crystal is precipitated, crystallizer top ammonium chloride solution is sent to air cooler and is cooled and recycled to crystallization
Device；Lower part magma is centrifugated again after thickener thickens, and chlorination ammonium product is made；
System is evacuated to 1300Pa by the vacuum pump that respective vacuum valve connects by air preheat vacuum drying oven, feed bin, separator
Vacuum, air preheat vacuum drying oven 1, feed bin 7, annular form vacuum systems to barrel 9, dore furnace 14, separator 14；
Feed: chlorination ammonium product enters air preheat vacuum drying oven by the flashboard type inlet valve 2 of air preheat furnace upper end,
110 DEG C of air are passed through air vacuum preheating furnace from hot air inlet 5, and ammonium chloride is preheated, when feed opening air themperature is 105 DEG C
Afterwards, stop being passed through hot-air, air preheat vacuum drying oven is then evacuated to 1300Pa, using 5 revolving plow reclaimers 4 by ammonium chloride
It is quickly discharged into feed bin 7, the feed bin revolving plow reclaimer 8 of 7 bottom three is opened after 5min, three annulars feeds to barrel 9 to 90%；It is empty
The pre- heating vacuum furnace 1 of gas closes 5 revolving plow reclaimers 4 after emptying, and opens the feed of flashboard type inlet valve 2 and repeats the step；
Thermal decomposition: annular is added to point having warmed up to 350 DEG C to the ammonium chloride in barrel 9 by revolving plow reclaimer 11
Heat resolve is carried out in solution furnace 13, the ammonia and hydrogen chloride gas after decomposition enter separator by high temperature flat-panel filter 16
14, JMT-1 type zeolite molecular sieves 17 successfully define that middle part forms the lower boundary of turbulent area, pass through hydrogen chloride sinking, ammonia
It cannot sink to passing through, open the ball valve at separator both ends, ammonia enters Ammonia recovery system from top, and hydrogen chloride enters from lower part
Hydrogen chloride collection system completes entire production process.
Claims (10)
1. a kind of method that ammonia alkali, connection alkali industry ammonium chloride directly thermally decompose, it is characterised in that the following steps are included:
A, the ammonium chloride saturated solution for generating ammonia alkali, send to cooler crystallizer, is cooled to 30~45 DEG C, is precipitated oversaturated
Ammonia chloride crystal send crystallizer top ammonium chloride solution to air cooler and is cooled and recycled to crystallizer；Lower part magma is through stiff
It is centrifugated again after device thickening, chlorination ammonium product is made；
B, by step a ammonium chloride be added air preheat vacuum drying oven preheating, by preheating, the mode of vacuumizing remove moisture removal and air；
C, the ammonium chloride after going moisture removal to vacuumize step b passes through confession by the revolving plow reclaimer of air preheat vacuum drying oven lower part
Material system enters dore furnace；
D, ammonium chloride decomposes rapidly at 350 DEG C in dore furnace, and the ammonia and hydrogen chloride gas after decomposition pass through high temperature plate
Filter enters separation system, and separation system is the separator for tilting 30-70 °, and separator interior is equipped with molecular sieve, outside separator
Vacuum pump is installed in side, and both ends fill ball valve connection ammonia and hydrogen chloride collection system；Separator interior is equipped with molecular sieve, molecular sieve energy
Enough restriction middle parts form the lower boundary of turbulent area, pass through hydrogen chloride sinking, and ammonia cannot sink to passing through, and final ammonia is by dividing
Enter Ammonia recovery system from device top, hydrogen chloride enters hydrogen chloride collection system by separator lower part.
2. a kind of ammonia alkali according to claim 1, the connection direct thermolysis process of alkali industry ammonium chloride, it is characterised in that step
The ammonium chloride of b is evacuated to 1300Pa after being preheated with 110 DEG C of hot-airs.
3. a kind of ammonia alkali, the connection direct pyrolysis device of alkali industry ammonium chloride, including feeding system, thermal decomposition system, separation system,
It is characterized in that feeding system includes air preheat vacuum drying oven, lower part by revolving plow reclaimer A connection feed bin, hot air inlet by
Pre- heating vacuum furnace lower part enters, and revolving plow reclaimer B is connected under feed bin, connects annular feed cylinder by connecting tube, annular gives barrel
Lower part connects revolving plow reclaimer C, and revolving plow reclaimer C is connect by feed pipe with dore furnace, air preheat vacuum drying oven, feed bin and ring
Shape is respectively mounted vacuum pump to barrel；Thermal decomposition system is dore furnace, fixed filter between separator and dore furnace；Separation system is
The separator of 30-70 ° of inclination, separator interior are equipped with molecular sieve, vacuum pump are installed on the outside of separator, and both ends fill ball valve and connect ammonia
Gas and hydrogen chloride collection system.
4. a kind of ammonia alkali according to claim 3, the connection direct pyrolysis device of alkali industry ammonium chloride, it is characterised in that described
Feeding system annular is 3 to barrel.
5. a kind of ammonia alkali according to claim 3, the connection direct pyrolysis device of alkali industry ammonium chloride, it is characterised in that feed
System is 2 sets, is symmetrically distributed in dore furnace two sides.
6. a kind of ammonia alkali according to claim 3, the connection direct pyrolysis device of alkali industry ammonium chloride, it is characterised in that described
Membrane Separator Cylinder for CFB Boiler is three-decker, is made of the protective layer in outside, intermediate heating layer and heat-conducting layer；Decomposing furnace tube is three layers
Structure is made of the protective layer in outside, intermediate heating layer and heat-conducting layer.
7. a kind of ammonia alkali according to claim 3 or 4, the connection direct pyrolysis device of alkali industry ammonium chloride, it is characterised in that
The air preheat vacuum drying oven lower impeller batcher A is 5, is arranged in X-shaped；Feed bin lower impeller batcher B is 3, is in
Equilateral triangle arrangement, annular are 3 to barrel lower impeller batcher C, fan-shaped arrangement.
8. a kind of ammonia alkali according to claim 3, the connection direct pyrolysis device of alkali industry ammonium chloride, it is characterised in that described
Filter be high temperature flat-panel filter, molecular sieve be JMT-1 type zeolite molecular sieve.
9. a kind of ammonia alkali according to claim 3 or 4, the connection direct pyrolysis device of alkali industry ammonium chloride, it is characterised in that
The annular is identical as the curvature of dore furnace to the curvature of barrel.
10. a kind of ammonia alkali according to claim 3 or 4, the connection direct pyrolysis device of alkali industry ammonium chloride, it is characterised in that
The angle of each feed pipe and dore furnace is 45 °.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935128A (en) * | 2010-07-22 | 2011-01-05 | 上海西恩化工设备有限公司 | Process for treating wastewater comprising high-concentration ammonium salt and sodium salt |
| CN105753016A (en) * | 2016-02-29 | 2016-07-13 | 浙江大学 | Multi-tube moving bed reaction device for preparing ammonia and hydrogen chloride by virtue of pyrolysis separation of ammonium chloride |
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| US6844273B2 (en) * | 2001-02-07 | 2005-01-18 | Tokyo Electron Limited | Precleaning method of precleaning a silicon nitride film forming system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935128A (en) * | 2010-07-22 | 2011-01-05 | 上海西恩化工设备有限公司 | Process for treating wastewater comprising high-concentration ammonium salt and sodium salt |
| CN105753016A (en) * | 2016-02-29 | 2016-07-13 | 浙江大学 | Multi-tube moving bed reaction device for preparing ammonia and hydrogen chloride by virtue of pyrolysis separation of ammonium chloride |
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