CN105833700A - Ammonia process-gypsum process desulfurization technique - Google Patents

Ammonia process-gypsum process desulfurization technique Download PDF

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Publication number
CN105833700A
CN105833700A CN201610259860.6A CN201610259860A CN105833700A CN 105833700 A CN105833700 A CN 105833700A CN 201610259860 A CN201610259860 A CN 201610259860A CN 105833700 A CN105833700 A CN 105833700A
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China
Prior art keywords
ammonia
ammonium sulfate
gypsum
ammonium
solid content
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Inventor
蒋远华
李元海
杨晓勤
周志江
王洪林
张立武
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Hubei Shuanghuan Science and Technology Stock Co Ltd
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Hubei Shuanghuan Science and Technology Stock Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/73—After-treatment of removed components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/96—Regeneration, reactivation or recycling of reactants

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses an ammonia process-gypsum process desulfurization technique and belongs to a desulfurization technique for boiler exhaust gas. The ammonia process-gypsum process desulfurization technique comprises the following steps: (1) inputting the boiler exhaust gas to a desulfurization tower; (2) spraying ammonia from the bottom of the desulfurization tower, performing ammonia washing, cooling and SO2 absorption on the exhaust gas and then forming net exhaust gas, and enabling the exhaust gas to react with SO2, thereby generating an ammonium sulfite solution; (3) blowing in air from the bottom of the desulfurization tower, oxidizing the ammonium sulfite solution into an ammonium sulfate solution, reducing the temperature of the exhaust gas through the ammonium sulfate solution, and concentrating the ammonium sulfate solution into the ammonium sulfate slurry in solid content of 5%-15%; (4) dehydrating the ammonium sulfate slurry in solid content of 5%-15% through a whirlcone and then forming the ammonium sulfate slurry in solid content of 40%; (5) enabling the ammonium sulfate slurry in solid content of 40% to react with calcium chloride effluent to generate gypsum and ammonium chloride, separating, washing and drying, thereby acquiring gypsum products; and (6) feeding the ammonium chloride into a distilling apparatus for recycling ammonia. According to the invention, the ammonia process is combined with the gypsum process, and thus the defects of high production cost of the ammonia process and low desulfurization efficiency of the gypsum process are overcome.

Description

A kind of ammonia process gypsum sulfur removal technology
Technical field
The present invention relates to SO in a kind of boiler smoke2Abjection and recovery method, more particularly to A kind of ammonia process gypsum sulfur removal technology.
Background technology
The ultimate principle of flue gas desulfurization is to absorb acid sulfur dioxide with alkaline matter.Cigarette at present Desulfurization technology can be divided into wet method, dry method according to the existence of desulphurization reaction thing and desulfurization product And semidry method.Wet Flue Gas Desulfurization Technique mainly include limestone-gypsum method, Dual alkali, magnesium processes, Ammonia process, seawater method etc.；Desulfurization by dry method mainly includes recirculating fluidized bed desulfurization technology, humidification Ash circulating flue gas desulfurization technology (NID), electronic beam method etc.；Semidry method mainly includes that circulation suspends Formula semidry method, spray drying, in-furnace calcium spraying/humidification activation desulfurization technology etc..
Limestone-gypsum method is current Application comparison technique widely the most in the world, accounts for whole cigarette More than the 90% of desulfurization device, is characterized in technical maturity, absorbent wide material sources, but is somebody's turn to do Technique is not strong to coal adaptability, and its by-product disposes more difficulty simultaneously, and operating cost is the most inclined High；Recirculating fluidized bed and NID technique are commonly available to medium and small unit and old Transformation of Unit, mesh Front unit heap(ed) capacity is 300MW, but needs to use highly active Calx, and absorbent is difficult to Obtain, at SO2When concentration is higher, its desulfuration efficiency it cannot be guaranteed that；And electronic beam method is the most still Immature；Seawater desulfurizing process is only applicable to the power plant using middle low-sulfur coal of coastal area；Magnesium Method sulfur removal technology is the most ripe, and desulfuration efficiency is secure, but its absorbent price is higher, simultaneously By-product recovery difficulty.
Ammonia desulfurizing process is with the SO in liquefied ammonia or ammonia absorption flue gas2, generate bisulfite Ammonium, ammonium bisulfite is reoxidised into ammonium sulfate, and reaction principle is as follows:
Absorb: SO2+H2O+xNH3=(NH4)xH2-xSO3(ammonium sulfite)
Oxidation: (NH4)XH2-XSO3+1/2O2+(2-x)NH3=(NH4)2SO4(sulfur ammonium)
After oxidation, sulfate sends into desulfurizing tower enriching section, utilizes the heat of high-temperature flue gas by molten for sulfur ammonium Liquid concentrates, and send crystallization, centrifugal, dry, obtains finished product sulfur ammonium.
Chinese invention patent (publication number: 1408464, publication date: 2003-04-09) is reported The abjection of SO2 and recovery method and the document of device in entitled flue gas, the document is open Low sulfur-containing smoke gas first with the reactant aqueous solution of ammonia, sound field ammonium sulfite solution, ammonia/sulfur ratio =1.3～1.8, mol ratio, gas/liquid ratio is 2000～5000, volume ratio；(2) sulfurous acid generated Ammonium salt solution and air carry out oxidation reaction and obtain ammonium sulfate, the ammonium sulfate that (3) generate Contacting with heat smoke, the ammonium sulfate having evaporated moisture is sent to sulfur crystalline ammonium device, is processed into business Product thiamine fertilizer.SO in the method collection flue gas2Absorption, sulfite oxidation, ammonium sulfate Concentrate, wash and remove mist (foam) function in integrally, easy to operate, investment cost and prior art Compare, under conditions of identical treating capacity, it is possible to decrease 10～30%, and energy consumption be relatively low, The waste heat of high-temperature flue gas obtains sufficiently utilization, and steam consumption can reduce by 90%.And, de- Sulphur efficiency is the highest, wherein SO in flue gas2Concentration can be down to 10～below 100ppm, and obtain The quality of the ammonium sulfate obtained meets the chemical fertilizer grade standard of country, and nitrogen content is 20.5～21%, can As agricultural chemical fertilizer.
Chinese invention patent (application publication number: CN102343211A, Shen Qing Publication day: 2012-02-08) reporting entitled a kind of method for desulfurizing flue gas of combustion boiler, the document is open By boiler induced-draft fan, flue gas is inputted desulfurizing tower, ammonia is sprayed into by bottom desulfurizing tower, Flue gas absorbs SO through ammonia scrubbing cooling2, except the neat stress after mist is arranged by tower top Wet chimney Put, SO in ammonia absorption flue gas2The ammonium sulfite formed, is blasted bottom desulfurizing tower Air oxygen chemical conversion ammonium sulfate, while ammonium sulfate makes flue-gas temperature reduce, self obtains dense Contracting, and obtain solid content 5-15% ammonium sulfate serosity, solid content is that the serosity of 5-15% is through sulphuric acid Ammonium sulfate operation delivered to by ammonium excavationg pump, forms the ammonium sulfate of solid content 40% after cyclone is dehydrated Serosity, the ammonium sulfate serosity of solid content 40% enters centrifuge and carries out solid-liquid separation, formed aqueous The wet ammonium sulfate of 4%, cyclone and centrifuge mother solution all return absorption tower, the wet sulfur of aqueous 4% Acid ammonium drying machine is dried, and obtains the ammonium sulfate product of moisture ＜ 1%.
Above two method all uses ammonia-process desulfurization technique, and the feature of the ammonia process of desulfurization is to turn waste into wealth, Do not produce secondary pollution, but products obtained therefrom sulfur ammonium quality is low, purposes is few, price is the lowest, and make Price for the ammonia of desulfurizing agent is the highest, and therefore operating cost is higher, and the sulfur ammonium generated Solubility with temperature raises and raises, and easily crystallizes wall built-up, and crystal deposition blocks reflux line, Cause circulating slot liquid level to drastically reduce, feed liquid may be caused to flow to flue, serious threat system Safety.
Summary of the invention
The present invention solves the problems referred to above, disclose a kind of ammonia process gypsum sulfur removal technology, connection Close ammonia process and gypsum, it is therefore an objective to while ensureing high desulfurization rate, twice laid, reduces and produces Cost, reaches environmental protection and produces.
The ammonia process gypsum sulfur removal technology of the present invention, comprises the steps:
(1) by boiler induced-draft fan, flue gas is inputted desulfurizing tower；
(2) being sprayed into by bottom desulfurizing tower by ammonia, flue gas absorbs SO through ammonia stripping cooling2 After become neat stress, described neat stress except after mist by tower top wet stack；In described flue gas SO2Reacting generation ammonium sulfite solution with ammonia, described ammonia is ammonia or liquefied ammonia；
(3) it is molten that ammonium sulfite solution is oxidized to ammonium sulfate by the air blasted bottom desulfurizing tower Liquid, ammonium sulfate makes flue-gas temperature reduce, and meanwhile, self being condensed into solid content is 5%～15% Ammonium sulfate serosity；
(4) described solid content be 5%～15% ammonium sulfate serosity excavationg pump deliver to ammonium sulfate work Sequence, forms the ammonium sulfate serosity that solid content is 40% after cyclone is dehydrated；
(5) described solid content be 40% ammonium sulfate serosity react with waste solution of calcium chloride, generate Gypsum Fibrosum and ammonium chloride, separate, wash and be dried to obtain gypsum product；
(6) described ammonium chloride is sent to distilling apparatus and reclaims ammonia.
Further, the waste solution of calcium chloride in described step (5) is that work prepared by ammonia-soda process soda Skill produces.
Further, the gypsum product in described step (5) is processed obtains commercialization Gypsum Fibrosum.
Further, the ammonium chloride in described step (6) is sent in distilling apparatus, with hydrogen-oxygen Change calcium reaction and generate ammonia, and reclaim ammonia.
For realizing technical scheme, specifically, distilling apparatus in described step (6) For ammonia-soda process ammonia still.
Further, the washing in described step (5) is for using fresh water (FW) washing.
For realizing technical scheme, specifically, described fresh water (FW) be use for laboratory from the beginning Water.
For realizing technical scheme, need to ensure SO2Dissolubility with pH reduction, The rising of temperature and raise, the pH=4～8 of desulfurizing tower run duration to be ensured.
For realizing technical scheme, it is ensured that the aqueous solution of ammonia and SO2It is fully contacted reaction, Regulating liquefied ammonia flow in desulfurizing tower and be less than 0.454t/h, the gas speed that control flue gas is passed through is at 5m | and s is left Right.
For realizing technical scheme, the liquefied ammonia concentration of employing is not less than 99.6%.
The escape of liquefied ammonia to be controlled in engineering, uses the C pump spray-head of primary pump to control to first-class The escape of liquefied ammonia processed.
Ammonia-soda process in the present invention, (generates raw with Sal (sodium chloride), limestone through calcining Calx and carbon dioxide), ammonia be that raw material carrys out preparing soda, first make ammonia be passed through saturated common salt Water forms ammonial brine, then be passed through carbon dioxide generate the less sodium bicarbonate precipitation of dissolubility and Ammonium chloride solution.Chemical principle: NaCl+NH3+H2O+CO2=NaHCO3↓+ NH4Cl
By the NaHCO through filtering, washing obtains3Tiny crystals, reheats calcining and prepares soda Product.
Chemical principle: 2NaHCO3=Na2CO3+H2O+CO2↑
The recyclable recycling of carbon dioxide released.Filtrate containing ammonium chloride and Calx Breast [Ca (OH)2] Hybrid Heating, the recyclable recycling of ammonia released.
Chemical principle: CaO+H2O=Ca (OH)2,
2NH4Cl+Ca(OH)2=CaCl2+2NH3↑+2H2O。
Beneficial effect: the invention discloses ammonia process gypsum sulfur removal technology, associating ammonia process and stone Cream method, compensate for ammonia process production cost high, and the shortcoming that gypsum desulfuration efficiency is low has desulfurization The efficiency advantage higher than 99%, produces by-product ammonium sulfate with ammonia-soda process process for preparing calcined soda simultaneously CaCl2Waste water reaction generates ammonium chloride and calcium sulfate, and calcium sulfate can be processed further producing For industrial goods as take-away, ammonium chloride can reclaim prepares ammonia, and ammonia can be used to supplement Ammonia in desulfurizing tower, thus reach the cyclic utilization of waste, environmental protection produces, and reduces and produces into This, the most whole operating procedure do not scabs, also can remove 20%NOx, floor space is little, resistance The advantages such as power is little, power consumption is low, energy-conservation compared with limestone-gypsum method more than 40%.
Accompanying drawing explanation
Fig. 1 is ammonia process gypsum desulfurization process figure of the present invention；
Detailed description of the invention
In order to preferably realize technical scheme, below in conjunction with specific embodiment and attached The present invention is further illustrated for figure.
Embodiment 1
As it is shown in figure 1, the present invention is, by boiler induced-draft fan, flue gas is inputted desulfuration absorbing tower, Being sprayed into by bottom desulfurizing tower by liquefied ammonia, the concentration controlling liquefied ammonia is 99.6%, controls flue gas Gas speed is 5m/s, it is ensured that the pH=4 of desulfurizing tower run duration solution, water-soluble through ammonia of flue gas Liquid washing cooling absorbs SO2, except the neat stress after mist is by tower top wet stack, the water of ammonia Solution absorbs SO in flue gas2The ammonium sulfite formed, the air blasted bottom desulfurizing tower It is oxidized to ammonium sulfate, while ammonium sulfate makes flue-gas temperature reduce, self is concentrated, And to obtain solid content be 5% ammonium sulfate serosity, solid content be 5% serosity discharge through ammonium sulfate It is pumped to ammonium sulfate operation, after cyclone is dehydrated, forms the ammonium sulfate serosity of solid content 40%； The chloride containing calcium wasting liquid that the ammonium sulfate serosity of solid content 40% produces with ammonia-sode process anhydrous sodium carbonate process again React, generate Gypsum Fibrosum and ammonium chloride, by filtering by Separation of gypsum out, use for laboratory The Gypsum Fibrosum washing separated is dried by tap water, and purity reaches 95%, packs gypsum product Obtain commercialization Gypsum Fibrosum, as taking out commodity, more remaining for above-mentioned filtration ammonium chloride is sent to ammonia Alkaline process distilling apparatus, reacts generation ammonia with Calx, adds hot preparation ammonia, be recovered to desulfurization In ammonia before tower, thus reach to recycle, reduce production cost, in this technical process Desulfuration efficiency has reached 99.0%.
Embodiment 2
As it is shown in figure 1, the present invention is, by boiler induced-draft fan, flue gas is inputted desulfuration absorbing tower, Being sprayed into by bottom desulfurizing tower by liquefied ammonia, the concentration controlling liquefied ammonia is 99.8%, controls flue gas Gas speed is 5m/s, it is ensured that the pH=6 of desulfurizing tower run duration, and flue gas is washed through the aqueous solution of ammonia Wash cooling and absorb SO2, except the neat stress after mist is by tower top wet stack, the aqueous solution of ammonia Absorb SO in flue gas2The ammonium sulfite formed, the air oxidation blasted bottom desulfurizing tower Become ammonium sulfate, while ammonium sulfate makes flue-gas temperature reduce, self concentrated, and Being 10% ammonium sulfate serosity to solid content, solid content is that the serosity of 10% is through ammonium sulfate excavationg pump Deliver to ammonium sulfate operation, after cyclone is dehydrated, forms the ammonium sulfate serosity of solid content 40%； The chloride containing calcium wasting liquid that the ammonium sulfate serosity of solid content 40% produces with ammonia-sode process anhydrous sodium carbonate process again React, generate Gypsum Fibrosum and ammonium chloride, by filtering by Separation of gypsum out, use laboratory Being dried, with tap water, the Gypsum Fibrosum washing separated, purity reaches 93.8%, to gypsum product It is packaged to be commercialization Gypsum Fibrosum, as taking out commodity, remaining for above-mentioned filtration ammonium chloride is sent to Ammonia-soda process distilling apparatus, reacts generation ammonia with Calx, adds hot preparation Ammonia recovery to desulfurization In ammonia before tower, reach to recycle, thus reduce production cost, right in this technical process SO2The response rate reached 99.5%
Embodiment 3
As it is shown in figure 1, the present invention is by boiler induced-draft fan, flue gas to be inputted desulfuration absorbing tower, by liquid Ammonia sprays into by bottom desulfurizing tower, and the concentration controlling liquefied ammonia is 99.6%, controls the gas speed of flue gas For 5m/s, it is ensured that the pH=6 of desulfurizing tower run duration, flue gas drops through the solution washing of ammonia Temperature absorbs SO2, except the neat stress after mist is absorbed by tower top wet stack, the aqueous solution of ammonia SO in flue gas2The ammonium sulfite formed, the air oxygen blasted bottom desulfurizing tower chemical conversion sulfur Acid ammonium, while ammonium sulfate makes flue-gas temperature reduce, self is concentrated, and is consolidated Content is 15% ammonium sulfate serosity, solid content be 15% serosity deliver to through ammonium sulfate excavationg pump Ammonium sulfate operation, forms the ammonium sulfate serosity of solid content 40% after cyclone is dehydrated；Solid content The chloride containing calcium wasting liquid that the ammonium sulfate serosity of 40% produces with ammonia-sode process anhydrous sodium carbonate process again is carried out instead Should, generate Gypsum Fibrosum and ammonium chloride, by filtering by Separation of gypsum out, with use for laboratory from the beginning The Gypsum Fibrosum washing separated is dried by water, and purity reaches 95.6%, packs gypsum product To commercialization Gypsum Fibrosum, as taking out commodity, remaining for above-mentioned filtration ammonium chloride is sent to ammonia-soda process Distilling apparatus, reacts generation ammonia with Calx, adds hot preparation Ammonia recovery to before desulfurizing tower In ammonia, reach to recycle, thus reduce production cost, to SO in this technical process2 The response rate reached 99.8%.

Claims (6)

1. an ammonia process gypsum sulfur removal technology, it is characterised in that: comprise the steps:
(1) by boiler induced-draft fan, flue gas is inputted desulfurizing tower；
(2) being sprayed into by bottom desulfurizing tower by ammonia, flue gas absorbs SO through ammonia stripping cooling2 After become neat stress, described neat stress except after mist by tower top wet stack；In described flue gas SO2Reacting generation ammonium sulfite solution with ammonia, described ammonia is ammonia or liquefied ammonia；
(3) it is molten that ammonium sulfite solution is oxidized to ammonium sulfate by the air blasted bottom desulfurizing tower Liquid, ammonium sulfate makes flue-gas temperature reduce, and meanwhile, self being condensed into solid content is 5%～15% Ammonium sulfate serosity；
(4) described solid content be 5%～15% ammonium sulfate serosity deliver to ammonium sulfate through excavationg pump Operation, forms the ammonium sulfate serosity that solid content is 40% after cyclone is dehydrated；
(5) described solid content be 40% ammonium sulfate serosity react with waste solution of calcium chloride, generate Gypsum Fibrosum and ammonium chloride, separate, wash and be dried to obtain gypsum product；
(6) described ammonium chloride is sent to distilling apparatus and reclaims ammonia.
Ammonia process gypsum sulfur removal technology the most according to claim 1, it is characterised in that: Waste solution of calcium chloride in described step (5) is that ammonia-soda process soda preparation technology produces.
Ammonia process gypsum sulfur removal technology the most according to claim 1 and 2, its feature It is: gypsum product in described step (5) is processed obtains commercialization Gypsum Fibrosum.
Ammonia process gypsum sulfur removal technology the most according to claim 1 and 2, its feature It is: the ammonium chloride in described step (6) is sent in distilling apparatus, with calcium hydroxide reaction Generate ammonia, heating recovery ammonia.
Ammonia process gypsum sulfur removal technology the most according to claim 4, it is characterised in that: In described step (6), distilling apparatus is ammonia-soda process ammonia still.
Ammonia process gypsum sulfur removal technology the most according to claim 1 and 2, its feature It is: the washing in described step (5) is for using fresh water (FW) washing.
CN201610259860.6A 2016-04-25 2016-04-25 Ammonia process-gypsum process desulfurization technique Pending CN105833700A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108686477A (en) * 2018-07-14 2018-10-23 邢台润天环保科技有限公司 A kind of sulfur removal technology and equipment reducing ammonia and doctor solution escape
CN110787604A (en) * 2019-11-29 2020-02-14 湖南绿脉环保科技有限公司 Comprehensive treatment method of sulfur-containing waste flue gas and carbide slag
CN114950116A (en) * 2022-04-08 2022-08-30 邢台润天环保科技有限公司 Method and system for regenerating circulating ammonia and by-product active calcium by ammonia calcium desulfurization

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WO2000007697A1 (en) * 1998-08-06 2000-02-17 Delores Pircon Method for desulfurizing gas and minimizing plume formation
CN102343211A (en) * 2011-10-08 2012-02-08 湖北双环科技股份有限公司 Method for desulfurizing flue gas of combustion boiler
CN102794100A (en) * 2012-07-25 2012-11-28 淮南市明月环保科技有限责任公司 Technology of desulphurization by regenerated ammonia with combined production of calcium sulfate whisker
CN104355326A (en) * 2014-10-16 2015-02-18 中国中轻国际工程有限公司 Thermal circulation technology of utilizing sodium sulfate solution or carrier to cogenerate sodium carbonate and ammonium sulfate
CN104528765A (en) * 2014-12-24 2015-04-22 湖北双环科技股份有限公司 Ammonia-soda-combined-soda cyclic production process and application thereof
TW201612112A (en) * 2014-09-22 2016-04-01 Recycle Technology Entpr Ltd Method of recycling ammonia from wastewater and preparing solid calcium sulfate and calcium chloride solution

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WO2000007697A1 (en) * 1998-08-06 2000-02-17 Delores Pircon Method for desulfurizing gas and minimizing plume formation
CN102343211A (en) * 2011-10-08 2012-02-08 湖北双环科技股份有限公司 Method for desulfurizing flue gas of combustion boiler
CN102794100A (en) * 2012-07-25 2012-11-28 淮南市明月环保科技有限责任公司 Technology of desulphurization by regenerated ammonia with combined production of calcium sulfate whisker
TW201612112A (en) * 2014-09-22 2016-04-01 Recycle Technology Entpr Ltd Method of recycling ammonia from wastewater and preparing solid calcium sulfate and calcium chloride solution
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108686477A (en) * 2018-07-14 2018-10-23 邢台润天环保科技有限公司 A kind of sulfur removal technology and equipment reducing ammonia and doctor solution escape
CN108686477B (en) * 2018-07-14 2023-12-01 邢台润天环保科技有限公司 Desulfurization process and equipment for reducing ammonia and desulfurizing liquid escape
CN110787604A (en) * 2019-11-29 2020-02-14 湖南绿脉环保科技有限公司 Comprehensive treatment method of sulfur-containing waste flue gas and carbide slag
CN114950116A (en) * 2022-04-08 2022-08-30 邢台润天环保科技有限公司 Method and system for regenerating circulating ammonia and by-product active calcium by ammonia calcium desulfurization

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Application publication date: 20160810