CN107162084A - A kind of salt water treating system and its method with preposition heat exchanger and rear end deduster - Google Patents
A kind of salt water treating system and its method with preposition heat exchanger and rear end deduster Download PDFInfo
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- CN107162084A CN107162084A CN201710457317.1A CN201710457317A CN107162084A CN 107162084 A CN107162084 A CN 107162084A CN 201710457317 A CN201710457317 A CN 201710457317A CN 107162084 A CN107162084 A CN 107162084A
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- tower
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- spray evaporation
- flue gas
- desulfurization wastewater
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- 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
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of salt water treating system and method with preposition heat exchanger and rear end deduster, wherein, salt water treating system includes boiler, air preheater, electric cleaner, desulfurizing tower, dehydration enrichment facility and the spray evaporation tower being sequentially communicated by pipeline, and the pipeline between boiler and air preheater is provided with denitrification apparatus；The bypass flue as heating medium extraction channel is provided between denitrification apparatus and air preheater, the end of bypass flue is connected in the pipe of a shell-and-tube heat exchanger, hot-air after heat transfer outside a tube is passed through spray evaporation tower, and the high-temperature flue gas mixed with internal desulfurization wastewater atomized drop after precipitation salts substances, intraductal heat exchange is passed through electric cleaner；The top of spray evaporation tower is provided with rotary atomizer, and sidepiece is provided with the recovery channel connected with desulfurizing tower, and the recovery channel is provided with sack cleaner.Pure air is heated using high-temperature flue gas, reusable heat air is evaporated to desulfurization wastewater atomized drop, it is possible to achieve desulfurization wastewater zero-emission.
Description
Technical field
The present invention relates to field of waste water treatment, specifically, it is related to a kind of with preposition heat exchanger and rear end deduster
Salt water treating system and its method.
Background technology
China is the country based on thermal power generation, wherein more than 90% power plant is de- using Gypsum Wet flue gas
Sulphur technique, in flue gas desulphurization system running, can produce and contain substantial amounts of calcium in a certain amount of desulfurization wastewater, desulfurization wastewater
Ion, sulfate ion, chlorion, heavy metal ion and suspension, in addition desulfurization wastewater also have acid big and biochemical oxygen demand
Measure the features such as (COD) is exceeded.
Thermal power plant is mainly traditional method of chemical treatment to the processing method of desulfurization wastewater, but method of chemical treatment has work
Skill is complicated, and cost is high, and inefficient to the chlorion in waste water, fluoride ion removing, and discharge can cause secondary pollution problems.
Current existing desulfurization wastewater treatment technology scheme has following several：
(1) multiple-effect evaporation technique, the process treatment process energy consumption is high, limits using for it and promotes.
(2) easy fouling on MVR evaporative crystallization techniques, thin film evaporator, the operation of influence equipment and efficiency, and the technology investment
It is high with operating cost.
(3) during fluidized bed process, processing waste water, chlorion removal efficiency is low.
(4) membrane separation technique, high to water quality requirement, the water quality of recycle-water is low.
(5) fume afterheat processing desulfurization wastewater, sprays into flue by desulfurization wastewater atomization, makes desulfurization wastewater using flue gas heat
Evaporative crystallization, crystalline material is collected by deduster and separated, and be there is easy accumulated ash into lump and is blocked flue, evaporation is incomplete, and corrosion is follow-up
The problems such as equipment.
Publication No. discloses a kind of power plant desulfurization wastewater treatment system and technique for CN105668669A patent document,
The first desulfurization wastewater atomising device is set in boiler furnace, evaporates waste water using fuel combustion heat, in air preheater and electricity
Flue sets the second desulfurization wastewater atomising device between deduster, evaporates waste water using high-temperature flue gas, the solid-state of remaining after evaporation
Material is removed by deduster.The problem of patent is present is that flue is narrow, evaporates the easy dust stratification knot of solid matter produced
Block, blocks flue, when evaporating incomplete, and corrosion can be caused to the device on flue by taking guttiferous flue gas.
Publication No. be CN103982903A patent documents disclose a kind of fume afterheat processing tail end wastewater system and its
Method, the pipeline extension heat smoke between economizer and air preheater is passed through waste water spray evaporator heating evaporation and given up
Water drop.The problem of patent is present is to contain dust in flue gas, directly handles desulfurization wastewater using heat smoke, is also easy to produce product
Grey agglomeration problems, and electric cleaner trapping is dust and the mixture for separating out salt, is unfavorable for the recovery of salt precipitate
Utilize.
The content of the invention
The purpose of the present invention is provides a kind of salt water treating system with preposition heat exchanger and rear end deduster, to solve
The problem of desulfurization wastewater spray evaporation process accumulated ash into lump and not high recovery crystallization purity salt.
Another object of the present invention is a kind of salt water treating system with preposition heat exchanger and rear end deduster of offer
Saline treatment method.
To achieve these goals, the salt water treating system with preposition heat exchanger and rear end deduster that the present invention is provided
Including the boiler being sequentially communicated by pipeline, air preheater, electric cleaner, desulfurizing tower, dehydration enrichment facility and spray evaporation
Tower, the pipeline between boiler and air preheater is provided with denitrification apparatus；It is provided between denitrification apparatus and air preheater as heating
The bypass flue of medium extraction channel, the end of bypass flue is connected in the pipe of shell-and-tube heat exchanger, the heat after heat transfer outside a tube
Air is passed through spray evaporation tower, and is mixed with the desulfurization wastewater atomized drop in tower, and atomized drop is separated out salt thing by thermal evaporation
High-temperature flue gas after matter, intraductal heat exchange is passed through electric cleaner；The top of spray evaporation tower be provided with rotary atomizer, sidepiece be provided with
The recovery channel of desulfurizing tower connection, the recovery channel is provided with sack cleaner.
In above-mentioned technical proposal, pure air is heated using high-temperature flue gas, reusable heat air is to desulfurization wastewater atomized drop
It is evaporated, the crystal salt after evaporation is recycled by follow-up sack cleaner, air is free of any dust in the system, from
Fundamentally solve desulfurization wastewater spray evaporation process accumulated ash into lump and reclaim the problem of crystallization purity salt is not high.Utilize rotation spray
Mist evaporates strong brine processing system, it is possible to achieve desulfurization wastewater " zero-emission " truly.
Specific scheme is spray evaporation tower in ash bucket of the bottom provided with collection salts substances.Ash bucket and sack cleaner one
Rise and reclaim the crystal salt after evaporation, increase the rate of recovery.
Another specific scheme is to be provided with two passes in parallel, two passes to be all provided between denitrification apparatus and desulfurizing tower
There is the electric cleaner that the high-temperature flue gas after air preheater and electric cleaner, intraductal heat exchange is passed through in wherein one passage.
In order to realize at another above-mentioned purpose, the salt solution with preposition heat exchanger and rear end deduster that the present invention is provided
The saline treatment method of reason system comprises the following steps：
Step 1：After the high-temperature flue gas of desulfurizing tower processing boiler discharge, obtained desulfurization wastewater is pre- in dehydration enrichment facility
Processing, is then sent in spray evaporation tower；
Step 2：Desulfurization wastewater after concentrated is atomized into 20~50 μm in spray evaporation top of tower by rotary atomizer
Droplet；
Step 3：Shell-and-tube heat exchanger is passed through using high-temperature flue gas of the part between denitrification apparatus and air preheater
Pipe in heating be passed through the air of spray evaporation tower, hot-air is mixed with the atomized drop in spray evaporation tower, atomized drop by
Thermal evaporation, separate out salts substances, a part of salts substances by evaporating column bottom ash bucket collect, remainder salt precipitate with
Air is discharged from spray evaporation tower side；
Step 4：Another part high-temperature flue gas discharged by denitrification apparatus passes through air preheater and electric cleaner progress
Reason, the flue gas feeding desulfurizing tower desulfurization after processing, the desulfurization wastewater feeding dehydration enrichment facility of generation；
Step 5：The high-temperature flue gas feeding electric cleaner processing discharged in the pipe of shell-and-tube heat exchanger；Step 3 cloth bag is removed
The flue gas that the air of dirt device discharge is discharged with step 4 electric cleaner, which converges, is passed through desulfurizing tower processing, is discharged after processing by chimney；
Repeat step 1~5 realizes that fume afterheat is utilized, and desulfurization wastewater processing, salt precipitate is recycled, realize de-
Sulphur wastewater zero discharge.
Specific scheme be it is concentrated described in step 2 after desulfurization wastewater enter spray evaporation tower using being vortexed, then lead to
Cross the droplet that rotary atomizer is atomized into 20~50 μm.
Another specific scheme is that pure air is 170~300 by shell-and-tube heat exchanger temperature after heating in step 3
℃。
Compared with prior art, beneficial effects of the present invention are：
(1) present invention is under hot air, the desulfurization wastewater droplet evaporating completely in spray evaporator, produces solid
Crystal, solid crystal thing is handled by base of evaporator ash bucket and the sack cleaner being separately provided and recycled, so as to realize
Desulfurization wastewater zero-emission, it is to avoid the secondary pollution that desulfurization wastewater is brought.
(2) present invention is atomized using rotary atomizer to desulfurization wastewater, and waste water atomizing effect is good, and evaporation is rapid.
(3) present invention utilizes the waste-heat air of the flue gas before air preheater, and reusable heat air heating evaporation takes off
Sulphur waste water, while waste recycling is realized, also makes the energy obtain Multi-class propagation, so as to effectively save the energy and reduce
Cost.
(4) present invention is atomized in desulfurization wastewater, air using hot air and is free of flue dust, will not produce accumulated ash into lump
Problem, and the purity of crystal salt is improved, beneficial to the recycling of crystal salt.
Brief description of the drawings
Fig. 1 is the structural representation of inventive embodiments.
Wherein：1st, boiler；2nd, high temperature bypass flue；3rd, shell-and-tube heat exchanger；4th, spray evaporation tower；5th, rotary atomizer；
6th, sack cleaner；7th, water pump；8th, it is dehydrated enrichment facility；9th, chimney；10th, desulfurizing tower；11st, electric cleaner；12nd, air preheat
Device；13rd, denitrification apparatus.
Embodiment
With reference to embodiments and its accompanying drawing the invention will be further described.
Embodiment
Referring to Fig. 1, the salt water treating system with preposition heat exchanger and rear end deduster includes being sequentially communicated by pipeline
Boiler 1, denitrification apparatus 13, air preheater 12, electric cleaner 11, desulfurizing tower 10, dehydration enrichment facility 8, water pump 7 and spraying
Evaporating column 4, in addition to shell-and-tube heat exchanger 3, sack cleaner 6 and chimney 9.Wherein, denitrification apparatus 13 and desulfurizing tower 10 it
Between provided with two passes in parallel, be equipped with air preheater 12 and electric cleaner 11 on every passage.
The bypass flue 2 as heating medium extraction channel, shell are provided between denitrification apparatus 13 and air preheater 12
The former smoke inlet of formula heat exchanger 3 is connected with the end of bypass flue 2, the former exhanst gas outlet of shell-and-tube heat exchanger 3 and air preheat
The outlet of device 12.The side of shell-and-tube heat exchanger 3, which is provided with, is used for passage and connection spray evaporation tower 4 that air enters
High temperature channel.Ash-laden gas in shell-and-tube heat exchanger 3 is in Bottomhole pressure, air transversal flow outside pipe, spray evaporation tower 4
In air and desulfurization wastewater spray direct contact heat transfer.Rotary atomizer 5 is provided with the top of spray evaporation tower 4, bottom is set
There is the ash bucket for collecting salts substances, sidepiece is provided with the recovery channel connected with desulfurizing tower 10, and sack cleaner 6 is arranged on the recovery
On pipeline.
The step of saline treatment method of salt water treating system with preposition heat exchanger and rear end deduster, is as follows：
Step 1：After the high-temperature flue gas of the processing boiler discharge of desulfurizing tower 10, obtained desulfurization wastewater is in dehydration enrichment facility
Pretreatment, is then delivered to waste water in spray evaporation tower 4 by water pump 7；
Step 2：Desulfurization wastewater after concentrated enters spray evaporation tower 4 using being vortexed, at the top of spray evaporation tower 4 by revolving
Turn the droplet that atomizer 5 is atomized into 20~50 μm；
Step 3：Shell-and-tube is passed through using high-temperature flue gas of the part between denitrification apparatus 13 and air preheater 12 to change
Heating is passed through the air of spray evaporation tower 4 in the pipe of hot device 3, and hot-air is mixed with the atomized drop in spray evaporation tower 4, is atomized
Drop is separated out salts substances by thermal evaporation, and a part of salts substances are collected by the bottom ash bucket of spray evaporation tower 4, remainder salt
Class precipitate is collected processing as air is discharged into sack cleaner 6 from the side of spray evaporation tower 4；
Step 4：Another part high-temperature flue gas discharged by denitrification apparatus 13 passes through air preheater 12 and electric cleaner 11
Handled, the flue gas feeding desulfurization of desulfurizing tower 10 after processing, the desulfurization wastewater feeding dehydration enrichment facility 8 of generation；
Step 5：The high-temperature flue gas feeding electric cleaner 11 discharged in the pipe of shell-and-tube heat exchanger 3 is handled, cloth in step 3
The flue gas discharged with electric cleaner in step 4 11 of air that bag dust collector 6 is discharged, which converges, to be passed through desulfurizing tower 10 and handles, logical after processing
Cross chimney discharge.
Repeat step 1~5 realizes that fume afterheat is utilized, and desulfurization wastewater processing, salt precipitate is recycled, realize de-
Sulphur wastewater zero discharge.Waste water in the present embodiment can give up for reluctant saliferous in heat-engine plant desulfurized waste water or other industry
Water.
Claims (6)
1. a kind of salt water treating system with preposition heat exchanger and rear end deduster, including the boiler being sequentially communicated by pipeline
(1), air preheater (12), electric cleaner (11), desulfurizing tower (10), dehydration enrichment facility (8) and spray evaporation tower (4), its
It is characterised by：
Pipeline between the boiler (1) and the air preheater (12) is provided with denitrification apparatus (13)；
The bypass flue as heating medium extraction channel is provided between the denitrification apparatus (13) and the air preheater (12)
(2)；
The end of the bypass flue (2) is connected in the pipe of a shell-and-tube heat exchanger (3), and the hot-air after heat transfer outside a tube is passed through
Described spray evaporation tower (4), and mixed with internal desulfurization wastewater atomized drop after precipitation salts substances, the intraductal heat exchange
High-temperature flue gas be passed through described electric cleaner (11)；
The top of the spray evaporation tower (4) is provided with rotary atomizer (5), and sidepiece is provided with time connected with the desulfurizing tower (10)
Closed tube road, the recovery channel is provided with sack cleaner (6).
2. the salt water treating system told according to claim 1, it is characterised in that：
Described spray evaporation tower (4) is in bottom provided with the ash bucket for collecting salts substances.
3. salt water treating system according to claim 1, it is characterised in that：
It is provided with two passes in parallel, two passes and is equipped between described denitrification apparatus (13) and described desulfurizing tower (10)
Described air preheater (12) and described electric cleaner (11)；
High-temperature flue gas after the intraductal heat exchange is passed through the electric cleaner (11) in wherein one passage.
4. the saline treatment method of system according to claim 1, it is characterised in that comprise the following steps：
Step 1：The desulfurization wastewater obtained after the high-temperature flue gas of desulfurizing tower (10) processing boiler discharge is in dehydration enrichment facility (8)
Pretreatment, is then sent in spray evaporation tower (4)；
Step 2：Desulfurization wastewater after concentrated is atomized into 20~50 μm at the top of spray evaporation tower (4) by rotary atomizer (5)
Droplet；
Step 3：Shell-and-tube is passed through using part from the high-temperature flue gas between denitrification apparatus (13) and air preheater (12) to change
Heating is passed through the air of spray evaporation tower (4) in the pipe of hot device (3), and hot-air is mixed with the atomized drop in spray evaporation tower (4)
Close, atomized drop is separated out salts substances by thermal evaporation, and a part of salts substances are collected by evaporating column bottom ash bucket, remainder
Salt precipitate is discharged with air from spray evaporation tower (4) side；
Step 4：Another part high-temperature flue gas discharged by denitrification apparatus (13) passes through air preheater (12) and electric cleaner
(11) handled, described desulfurizing tower (10) desulfurization of the flue gas feeding after processing, the desulfurization wastewater feeding of generation is described to be taken off
Water enrichment facility (8)
Step 5：Entered by the high-temperature flue gas of discharge in the pipe of the shell-and-tube heat exchanger (3) after electric cleaner (11) dedusting and sent into
Desulfurizing tower (10) desulfurization, the flue gas of spray evaporation tower (4) side discharge is also fed into institute after sack cleaner (6) dedusting
Desulfurizing tower (10) desulfurization stated.
5. saline treatment method according to claim 4, it is characterised in that：
Described in step 2 it is concentrated after desulfurization wastewater enter spray evaporation tower (4) using being vortexed, then pass through rotary atomizer
(5) it is atomized into 20~50 μm of droplet.
6. saline treatment method according to claim 4, it is characterised in that：
Pure air is 170~300 DEG C by described shell-and-tube heat exchanger (3) temperature after heating in step 3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710457317.1A CN107162084B (en) | 2017-06-16 | 2017-06-16 | Saline water treatment system with front heat exchanger and rear dust remover and method thereof |
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| CN201710457317.1A CN107162084B (en) | 2017-06-16 | 2017-06-16 | Saline water treatment system with front heat exchanger and rear dust remover and method thereof |
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| CN107162084B CN107162084B (en) | 2023-04-07 |
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Cited By (16)
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|---|---|---|---|---|
| CN107697967A (en) * | 2017-10-11 | 2018-02-16 | 江苏中建材环保研究院有限公司 | A kind of Desulphurization for Coal-fired Power Plant wastewater zero discharge system and method |
| CN107963683A (en) * | 2017-12-26 | 2018-04-27 | 上海双骏环保科技有限公司 | A kind of desulfurization wastewater zero-emission complexes |
| CN108178217A (en) * | 2018-01-08 | 2018-06-19 | 华电水务工程有限公司 | A kind of high slat-containing wastewater is evaporated system and technique |
| CN108479088A (en) * | 2018-03-02 | 2018-09-04 | 东南大学 | Salty organic waste liquid desalination pyrolysis treating method and system |
| CN108585091A (en) * | 2018-03-21 | 2018-09-28 | 国家能源投资集团有限责任公司 | A kind of Waste water concentrating system and method that hot-air Natural Circulation water is in line |
| CN108793557A (en) * | 2018-06-14 | 2018-11-13 | 龙净科杰环保技术（上海）有限公司 | A kind of desulfurization wastewater bypass flue evaporation treatment process and system |
| CN109019734A (en) * | 2018-08-28 | 2018-12-18 | 盛发环保科技（厦门）有限公司 | A kind of system of desulfurization wastewater zero-emission |
| CN109133237A (en) * | 2018-08-01 | 2019-01-04 | 华电电力科学研究院有限公司 | A kind of thermal power plant end high-salinity wastewater zero-emission processing system and its working method |
| CN109455867A (en) * | 2018-12-28 | 2019-03-12 | 大唐环境产业集团股份有限公司 | A kind of flexibly adjustable thermal power plant's full load high-salinity wastewater zero-emission system and method |
| CN110759407A (en) * | 2019-11-07 | 2020-02-07 | 北京博奇电力科技有限公司 | Two-stage energy-saving evaporation system with zero discharge of desulfurization wastewater |
| CN111270077A (en) * | 2020-03-02 | 2020-06-12 | 长沙中硅环保科技有限公司 | System and method for treating dust collection ash of steel plant by chain plate type high-temperature reduction furnace |
| CN111729459A (en) * | 2020-07-21 | 2020-10-02 | 西安热工研究院有限公司 | Full-load dust remover efficiency improving and wastewater evaporating system |
| CN112239242A (en) * | 2020-09-28 | 2021-01-19 | 中国华能集团清洁能源技术研究院有限公司 | Desulfurization wastewater zero-discharge system for gradient utilization of flue gas waste heat and working method thereof |
| CN113003786A (en) * | 2021-03-26 | 2021-06-22 | 马鞍山钢铁股份有限公司 | Combined treatment process for industrial gas dust removal water of CCPP unit |
| CN113104915A (en) * | 2021-03-23 | 2021-07-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Evaporating system for sewage and wastewater |
| CN114275836A (en) * | 2021-12-17 | 2022-04-05 | 中石化节能技术服务有限公司 | Method and device for treating salt-containing sewage by using flue gas waste heat |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107697967A (en) * | 2017-10-11 | 2018-02-16 | 江苏中建材环保研究院有限公司 | A kind of Desulphurization for Coal-fired Power Plant wastewater zero discharge system and method |
| CN107963683A (en) * | 2017-12-26 | 2018-04-27 | 上海双骏环保科技有限公司 | A kind of desulfurization wastewater zero-emission complexes |
| CN108178217A (en) * | 2018-01-08 | 2018-06-19 | 华电水务工程有限公司 | A kind of high slat-containing wastewater is evaporated system and technique |
| CN108479088B (en) * | 2018-03-02 | 2020-12-11 | 东南大学 | Desalting and pyrolysis treatment method and system for salt-containing organic waste liquid |
| CN108479088A (en) * | 2018-03-02 | 2018-09-04 | 东南大学 | Salty organic waste liquid desalination pyrolysis treating method and system |
| CN108585091A (en) * | 2018-03-21 | 2018-09-28 | 国家能源投资集团有限责任公司 | A kind of Waste water concentrating system and method that hot-air Natural Circulation water is in line |
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