CN108840386A - A kind of ammonia steaming system - Google Patents
A kind of ammonia steaming system Download PDFInfo
- Publication number
- CN108840386A CN108840386A CN201811013946.6A CN201811013946A CN108840386A CN 108840386 A CN108840386 A CN 108840386A CN 201811013946 A CN201811013946 A CN 201811013946A CN 108840386 A CN108840386 A CN 108840386A
- Authority
- CN
- China
- Prior art keywords
- ammonia
- steaming system
- outlet
- still
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 328
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 164
- 238000010025 steaming Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 230000004087 circulation Effects 0.000 claims abstract description 38
- 238000007701 flash-distillation Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000009833 condensation Methods 0.000 claims abstract description 6
- 230000005494 condensation Effects 0.000 claims abstract description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 68
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 59
- 239000002351 wastewater Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 19
- 239000000908 ammonium hydroxide Substances 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a kind of ammonia steaming system, which includes ammonia still, reboiler, circulation heat exchanger, compressor and flash distillation plant；Wherein, circulation heat exchanger has ammonia steam inlet, circulating condensing water inlet and circulating condensing water out, is connected at the top of ammonia steam inlet and ammonia still, circulating condensing water inlet and circulating condensing water out are connected with flash distillation plant；Wherein, reboiler has material inlet, material outlet, steam inlet and condensation-water drain, and material inlet and material outlet are connected with ammonia still, and steam inlet is connected by compressor with flash distillation plant, and condensation-water drain is connected with flash distillation plant.The ammonia steaming system makes full use of the ammonia latent heat of the steam escaped at the top of ammonia still, make it eventually as the heat source of reboiler, make no longer to need to be passed through live steam in system operation, also a large amount of cooling water condensation ammonia steam is no longer needed, therefore there is preferable energy-saving and water-saving performance, meet the energy-saving and emission-reduction demand of user.
Description
Technical field
The present invention relates to ammonia still process technical fields, more particularly to a kind of ammonia steaming system.
Background technique
Ammonia still process is that separation waste water and remained ammonia that coking process generates are passed through ammonia still and are distilled.It is a kind of common
Ammonia still process mode is water vapour ammonia still process.
The working principle of water vapour ammonia still process is：Using water vapour as heating agent, make the balance for recycling ammonia in water level
Vapour pressure is greater than the partial pressure of ammonia in heat carrier, and vehicle repair major counter current contacting carries out mass-and heat-transfer, to make ammonia gradually from following
It is released in ring water, obtains the mixture of ammonia steam and water vapour in tower top.
During water vapour ammonia still process, ammonia still process tower section material (weak aqua ammonia) returns again to ammonia still process after being passed through reboiler heating
Tower.
Existing ammonia steaming system is the production process using fresh low-pressure steam as reboiler heat source, needs to consume a large amount of
Low-pressure steam, cause the energy consumption of whole system very big, energy-efficient performance is poor.
In view of this, developing a kind of ammonia steaming system, it is made to evade above-mentioned drawback, there is preferable energy-efficient performance, be ability
Field technique personnel's technical issues that need to address.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of ammonia steaming system, the ammonia steaming system includes ammonia still, boils again
Device, circulation heat exchanger, compressor and flash distillation plant；
Wherein, the circulation heat exchanger has ammonia steam inlet, circulating condensing water inlet and circulating condensing water out, described
Be connected at the top of ammonia steam inlet and the ammonia still, the circulating condensing water inlet and the circulating condensing water out with
The flash distillation plant is connected；
Wherein, the reboiler has material inlet, material outlet and steam inlet, the material inlet and the material
Outlet is connected with the ammonia still, and the steam inlet is connected by the compressor with the flash distillation plant.
When system starts, live steam is passed through to ammonia still.During ammonia still process, ammonia still process is passed through after raw material weak aqua ammonia is preheated
Tower, in ammonia still, live steam heats weak aqua ammonia, and steam containing ammonia (context abbreviation ammonia steam) is made to escape from the top of ammonia still
Out, the ammonia steam of evolution flows into circulation heat exchanger.
Moreover, the circulating condensing water in flash distillation plant also flows into circulation heat exchanger, and in circulation heat exchanger, the heating of ammonia steam
Circulating condensing water, the circulating condensing water after being heated flow into flash distillation plant and are evaporated, and the steam evaporated is through compressor boost
After be passed through reboiler.
Moreover, the material (weak aqua ammonia) in ammonia still can also be passed through reboiler after system behaves, in reboiler,
Steam heats this partial material, so that this partial material is heated up, again returns to ammonia still later, so on circulate.
As it can be seen that the ammonia steaming system makes it eventually as reboiler using the ammonia latent heat of the steam escaped at the top of ammonia still
Heat source makes system only be passed through live steam on startup, no longer needs to be passed through live steam in operational process, also no longer needs big
The cooling water condensation ammonia steam of amount reduces the demand to external heating resource and cooling resource, mentions compared to existing technologies
The high energy-saving and water-saving performance of system, reduces energy consumption, meets the energy-saving and emission-reduction demand of user, and can save and be produced into
This.
Optionally, the ammonia steaming system further includes reheater, and the circulating condensing water out of the circulation heat exchanger is logical
The reheater is crossed to be connected with the flash distillation plant；There is the reheater distilled ammonia wastewater entrance and distilled ammonia wastewater to export, institute
Distilled ammonia wastewater entrance is stated to be connected with the bottom of the ammonia still.
Optionally, the ammonia steaming system further includes preheater, and the preheater has raw material weak aqua ammonia entrance and raw material dilute
Ammonium hydroxide outlet, the raw material weak aqua ammonia outlet are connected with the ammonia still；Also, the steaming of the preheater and the reheater
Ammonia waste water outlet is connected.
Optionally, the ammonia steaming system further includes preheater, and the preheater has raw material weak aqua ammonia entrance and raw material dilute
Ammonium hydroxide outlet, the raw material weak aqua ammonia outlet are connected with the ammonia still；And the bottom of the preheater and the ammonia still
Portion is directly connected to, to introduce distilled ammonia wastewater.
Specifically, the reboiler also has condensation-water drain, and the condensation-water drain is connected with the flash distillation plant.
Optionally, the ammonia steaming system further includes condenser, and the circulation heat exchanger also has ammonium hydroxide outlet；The ammonium hydroxide
Outlet is connected with the condenser and the ammonia still.
Optionally, the ammonia steaming system further includes aqua ammonia pump；The ammonium hydroxide outlet of the circulation heat exchanger passes through described
Aqua ammonia pump is connected with the condenser and the ammonia still.
Optionally, gas-liquid separator is provided between the circulation heat exchanger and the aqua ammonia pump.
Optionally, the ammonia steaming system further includes condenser, and the circulation heat exchanger also has ammonium hydroxide outlet；The ammonium hydroxide
Outlet is connected with the condenser and the outlet of the concentrated ammonia liquor of the condenser is connected with the ammonia still.
Optionally, the ammonia steaming system further includes aqua ammonia pump；The concentrated ammonia liquor outlet of the condenser passes through the aqua ammonia pump
It is connected with the ammonia still.
Detailed description of the invention
Fig. 1 is the schematic diagram of the first specific embodiment of ammonia steaming system provided by the invention.
Fig. 2 is the schematic diagram of the second specific embodiment of ammonia steaming system provided by the invention.
The reference numerals are as follows in Fig. 1-Fig. 2：
101 ammonia stills, 102 reboilers, 103 circulation heat exchangers, 104 flash distillation plants, 105 compressors, 106 circulations
Condensate pump, 107 reheaters, 108 preheaters, 109 condensers, 110 aqua ammonia pumps, 111 gas-liquid separators.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, with reference to the accompanying drawing and have
Body embodiment is described in further detail technical solution of the present invention.
Fig. 1-Fig. 2 is please referred to, Fig. 1 is the schematic diagram of the first specific embodiment of ammonia steaming system provided by the invention；Fig. 2 is this
The schematic diagram of the second specific embodiment of ammonia steaming system provided is provided.
As shown, the ammonia steaming system include ammonia still 101, it is reboiler 102, circulation heat exchanger 103, compressor 105, pre-
Hot device 108 and flash distillation plant 104.
Wherein, circulation heat exchanger 103 has ammonia steam inlet, circulating condensing water inlet and circulating condensing water out, and ammonia steams
Vapour entrance is connected with the top of ammonia still 101, circulating condensing water inlet and circulating condensing water out with 104 phase of flash distillation plant
Connection.
Wherein, reboiler 102 has material inlet, steam inlet and a material outlet, material inlet and material outlet with
Ammonia still 101 is connected, and steam inlet is connected by compressor 105 with flash distillation plant 104.
Wherein, preheater 108 includes that raw material weak aqua ammonia entrance and raw material weak aqua ammonia export, raw material weak aqua ammonia entrance and ammonia still process
Tower 101 is connected.
Wherein, internal in 104 operational process of flash distillation plant to be able to maintain that certain vacuum degree, so as to make water due to pressure
Power declines and rapid evaporation is steam.
When system starts, live steam is passed through to ammonia still 101.During ammonia still process, the preheated device 108 of raw material weak aqua ammonia is pre-
Ammonia still 101 is passed through after heat, in ammonia still 101, live steam heats weak aqua ammonia, and making steam containing ammonia, (context abbreviation ammonia steams
Vapour) it is escaped from the top of ammonia still 101, the ammonia steam of evolution flows into circulation heat exchanger 103.
Moreover, the circulating condensing water in flash distillation plant 104 also flows into circulation heat exchanger 103, in circulation heat exchanger 103,
Ammonia steam heat cycles condensed water, the circulating condensing water after being heated flow into flash distillation plant 104 and are evaporated, the steam evaporated
Reboiler 102 is passed through after the pressurization of compressor 105.
Moreover, the material (weak aqua ammonia) in ammonia still 101 can also be passed through reboiler 102 after system behaves, boiling again
In device 102, steam heats this partial material, so that this partial material is heated up, again returns to ammonia still 101 later, and so on
Circulation.
As it can be seen that the ammonia steaming system makes it eventually as reboiler using the ammonia latent heat of the steam escaped at the top of ammonia still 101
102 heat source makes system only be passed through live steam on startup, no longer needs to be passed through live steam in operational process, also no longer
A large amount of cooling water condensation ammonia steam is needed, compared to existing technologies, is reduced to external heating resource and cooling resource
Demand improves the energy-saving and water-saving performance of system, reduces energy consumption, meets the energy-saving and emission-reduction demand of user, and can save
About production cost.
Specifically, as shown, ammonia steaming system further includes circulating condensing water pump 106, the circulating condensing of circulation heat exchanger 103
Water inlet is connected by circulating condensing water pump 106 with flash distillation plant 104, and the circulating condensing water in flash distillation plant 104 is through recycling
Condensate pump 106 is pumped in circulation heat exchanger 103.
Specifically, as shown, reboiler 102 also has condensation-water drain, and condensation-water drain and 104 phase of flash distillation plant
Connection.It can be condensed into condensed water after the material in steam heated reboiler 102 being passed through in reboiler 102, this partial condensation water
It is evaporated to steam again after condensation-water drain flows into flash distillation plant 104, and again returns to reboiler 102, as reboiler 102
Heat source.That is, the condensed water for being passed through flash distillation plant 104 has two parts, a part comes from reboiler 102, and another part comes
Self circulation heat exchange device 103 (i.e. above-mentioned circulating condensing water).
Specifically, as shown, ammonia steaming system further includes condenser 109, moreover, circulation heat exchanger 103 also has ammonium hydroxide
Outlet.
In the first specific embodiment, as shown in Figure 1, circulation heat exchanger 103 ammonium hydroxide outlet by aqua ammonia pump 110 with it is cold
Condenser 109 and ammonia still 101 are connected.The circulation being passed through in the ammonia steam heat cycles heat exchanger 103 in circulation heat exchanger 103
Ammonium hydroxide can be condensed into after condensed water.A part in this partial ammonia water is exported through ammonium hydroxide flows into condenser 109, in condenser 109
It is interior through cooling water condensation be concentrated ammonia liquor, later except discharge system；Another part enters ammonia still 101 through ammonium hydroxide outlet return, then
Secondary input coefficient circulation.
Moreover, also setting up gas-liquid separator between circulation heat exchanger 103 and aqua ammonia pump 110 in the first specific embodiment
111, the liquid phase medium isolated through gas-liquid separator 111 flows into aqua ammonia pump 110, and the gas phase media isolated flows into condenser
109.So set, can evade gas enters aqua ammonia pump 101, conducive to the stable operation of aqua ammonia pump 101.
In the second specific embodiment, as shown in Fig. 2, the ammonium hydroxide outlet of circulation heat exchanger 103 is connected with condenser 109
It is logical, also, the concentrated ammonia liquor outlet of condenser 109 is connected by aqua ammonia pump 110 with ammonia still.Ammonia in circulation heat exchanger 103
Water is all passed through condenser 109, and concentrated ammonia liquor is cooled in condenser 109, and later, part concentrated ammonia liquor is expelled to except system,
Part concentrated ammonia liquor passes back into ammonia still 101, and input coefficient recycles again.
Further, as shown, the ammonia steaming system further includes reheater 107, the circulating condensing water of circulation heat exchanger 103
Outlet is connected by reheater 107 with flash distillation plant 104.There is the reheater 107 distilled ammonia wastewater entrance and distilled ammonia wastewater to go out
Mouthful, distilled ammonia wastewater entrance is connected with the bottom of ammonia still 101.
So set, the distilled ammonia wastewater of 101 bottom of ammonia still discharge is passed through reheater 107.Circulating condensing water is in circulating picture-changing
In hot device 103 after the heating of ammonia steam, it is passed through reheater 107, heats in reheater 107 through distilled ammonia wastewater, is passed through again later
Flash distillation plant 104 is evaporated.
As it can be seen that so set, effectively having recycled the part of evaporating waste water using evaporating waste water reheating circulating condensing water
Sensible heat further improves the energy-efficient performance of system, but also improves the temperature of circulating condensing water, so as to improve evaporation
Efficiency promotes the efficiency of whole system.
Further, the preheater 108 of above-mentioned preheating material weak aqua ammonia is connected with the outlet of the distilled ammonia wastewater of reheater 107
It is logical.The distilled ammonia wastewater for having heated circulating condensing water is passed through preheater 108 again and heats raw material weak aqua ammonia, so set, being classified back
The sensible heat for receiving distilled ammonia wastewater, keeps the utilization rate of the sensible heat of distilled ammonia wastewater higher, so as to the energy saving of further lifting system
Energy.
It should be noted that preheater 108 can also be made directly to be connected with the bottom of ammonia still 101, under this set,
The distilled ammonia wastewater being discharged from ammonia still 101 directly heats raw material weak aqua ammonia without reheater 107.
From above-mentioned analysis it is found that ammonia steaming system provided by the invention takes full advantage of the ammonia steaming escaped at the top of ammonia still 101
The sensible heat of the latent heat of vapour and the distilled ammonia wastewater of 101 bottom of ammonia still discharge meets to have preferable energy-saving and water-saving performance
The energy-saving and emission-reduction demand of user, and production cost can be saved.
A kind of ammonia steaming system provided by the invention is described in detail above.Specific case used herein is to this
The principle and embodiment of invention is expounded, method of the invention that the above embodiments are only used to help understand and
Its core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection of the claims in the present invention
In range.
Claims (10)
1. a kind of ammonia steaming system, which is characterized in that the ammonia steaming system includes ammonia still (101), reboiler (102), circulating picture-changing
Hot device (103), compressor (105) and flash distillation plant (104)；
Wherein, the circulation heat exchanger (103) has ammonia steam inlet, circulating condensing water inlet and circulating condensing water out, institute
It states and is connected at the top of ammonia steam inlet and the ammonia still (101), the circulating condensing water inlet and the circulating condensing water
Outlet is connected with the flash distillation plant (104)；
Wherein, the reboiler (102) has material inlet, material outlet and steam inlet, the material inlet and the object
Material outlet is connected with the ammonia still (101), and the steam inlet passes through the compressor (105) and the flash distillation plant
(104) it is connected.
2. ammonia steaming system according to claim 1, which is characterized in that the ammonia steaming system further includes reheater (107), institute
The circulating condensing water out for stating circulation heat exchanger (103) passes through the reheater (107) and the flash distillation plant (104) phase
Connection；There is the reheater (107) distilled ammonia wastewater entrance and distilled ammonia wastewater to export, the distilled ammonia wastewater entrance and the ammonia still process
The bottom of tower (101) is connected.
3. ammonia steaming system according to claim 2, which is characterized in that the ammonia steaming system further includes preheater (108), institute
It states preheater (108) to export with raw material weak aqua ammonia entrance and raw material weak aqua ammonia, the raw material weak aqua ammonia outlet and the ammonia still process
Tower (101) is connected；Also, the preheater (108) is connected with the outlet of the distilled ammonia wastewater of the reheater (107).
4. ammonia steaming system according to claim 1 or 2, which is characterized in that the ammonia steaming system further includes preheater
(108), there is the preheater (108) raw material weak aqua ammonia entrance and raw material weak aqua ammonia to export, the raw material weak aqua ammonia outlet with
The ammonia still (101) is connected；And the preheater (108) is directly connected to the bottom of the ammonia still (101), to draw
Enter distilled ammonia wastewater.
5. ammonia steaming system according to claim 1-3, which is characterized in that the reboiler (102) also has cold
Condensate outlet, the condensation-water drain are connected with the flash distillation plant (104).
6. ammonia steaming system according to claim 5, which is characterized in that the ammonia steaming system further includes condenser (109), institute
Stating circulation heat exchanger (103) also has ammonium hydroxide outlet；The ammonium hydroxide outlet and the condenser (109) and the ammonia still
(101) it is connected.
7. ammonia steaming system according to claim 6, which is characterized in that the ammonia steaming system further includes aqua ammonia pump (110)；Institute
The ammonium hydroxide for stating circulation heat exchanger (103) is exported through the aqua ammonia pump (110) and the condenser (109) and the ammonia still process
Tower (101) is connected.
8. ammonia steaming system according to claim 7, which is characterized in that the circulation heat exchanger (103) and the aqua ammonia pump
(110) gas-liquid separator (111) are provided between.
9. ammonia steaming system according to claim 5, which is characterized in that the ammonia steaming system further includes condenser (109), institute
Stating circulation heat exchanger (103) also has ammonium hydroxide outlet；The ammonium hydroxide outlet is connected with the condenser (109) and the condensation
The concentrated ammonia liquor outlet of device (109) is connected with the ammonia still (101).
10. ammonia steaming system according to claim 9, which is characterized in that the ammonia steaming system further includes aqua ammonia pump (110)；
The concentrated ammonia liquor outlet of the condenser (109) is connected by the aqua ammonia pump (110) with the ammonia still (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013946.6A CN108840386A (en) | 2018-08-31 | 2018-08-31 | A kind of ammonia steaming system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013946.6A CN108840386A (en) | 2018-08-31 | 2018-08-31 | A kind of ammonia steaming system |
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| Publication Number | Publication Date |
|---|---|
| CN108840386A true CN108840386A (en) | 2018-11-20 |
Family
ID=64233885
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811013946.6A Pending CN108840386A (en) | 2018-08-31 | 2018-08-31 | A kind of ammonia steaming system |
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| Country | Link |
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| CN (1) | CN108840386A (en) |
Cited By (4)
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| CN110566302A (en) * | 2019-09-25 | 2019-12-13 | 昆山三一环保科技有限公司 | device of low-temperature waste heat recovery system |
| CN112717938A (en) * | 2020-12-30 | 2021-04-30 | 江苏凯美普瑞工程技术有限公司 | Preparation method, application method and device of catalyst for preparing methyl glycolate from dimethyl oxalate |
| CN113800700A (en) * | 2020-06-11 | 2021-12-17 | 应城市新都化工有限责任公司 | High-efficient waste liquid ammonia still |
| CN114212850A (en) * | 2021-12-27 | 2022-03-22 | 中冶焦耐(大连)工程技术有限公司 | High-efficiency energy-saving thermal coupling ammonia distillation process |
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| CN114212850A (en) * | 2021-12-27 | 2022-03-22 | 中冶焦耐(大连)工程技术有限公司 | High-efficiency energy-saving thermal coupling ammonia distillation process |
| CN114212850B (en) * | 2021-12-27 | 2024-04-26 | 中冶焦耐(大连)工程技术有限公司 | Efficient energy-saving type thermal coupling ammonia distillation process |
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