CN105498503A - Novel dual-alkali flue gas desulfurization method and flue gas desulfurization system - Google Patents
Novel dual-alkali flue gas desulfurization method and flue gas desulfurization system Download PDFInfo
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- CN105498503A CN105498503A CN201610062430.5A CN201610062430A CN105498503A CN 105498503 A CN105498503 A CN 105498503A CN 201610062430 A CN201610062430 A CN 201610062430A CN 105498503 A CN105498503 A CN 105498503A
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
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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
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention provides a novel dual-alkali flue gas desulfurization method and flue gas desulfurization system, and relates to the technical field of flue gas purification. The method comprises the following steps of absorbing SO2 in flue gas to generate an absorption solution containing sodium sulfite and sodium bisulfite by taking sodium hydroxide or sodium carbonate as an absorbent, enabling the absorption solution to enter a regenerated reactor, regenerating the absorption solution in the regenerated reactor by using magnesium oxide or magnesium hydroxide, performing precipitation separation by virtue of a solid-liquid separator, enabling sodium sulfite or sodium hydroxide formed by regeneration to return to a desulfurization tower for flue gas absorption for recycling, enabling magnesium sulfite precipitates obtained by solid-liquid separation to enter a desulfurization product treatment system, and directly discharging magnesium sulfite or preparing magnesium sulfate. According to the method and the system, a sodium and magnesium dual-alkali method is adopted for flue gas desulfurization, so that a good desulfurization effect is achieved, oxidation is not required by the system, accumulation of sodium sulfate is avoided, and the system can run for a long time; moreover, the materials in the system can be regenerated and recycled, therefore alkali consumption is reduced, and the cost is reduced.
Description
Technical field
The present invention relates to Chemical Manufacture and field of Environment Protection, relate to flue gases purification field, relate to the desulfurizer and auxiliary device that use in desulfurization, particularly relate to a kind of Novel dual-alkali method flue gas desulphurization system, be specifically related to a kind of Novel dual-alkali method fume desulphurization method and flue gas desulphurization system.
Background technology
The sulfur dioxide contained in flue gas can produce very serious pollution to atmospheric environment, serious destroys the ecological balance, and great harm is created to the health of animals and plants and the mankind, also can there is acid rain to a great extent, carry out corroding to building and destroy, serious affects ecological environment and living environment.So in order to effectively reduce the harm that sulfur dioxide produces, relevant departments constantly research and develop relevant Treatment process.Present stage, flue gas desulfurization is mainly to the technological means that sulfur dioxide pollution is administered, and in the industry, is mainly Wet Flue Gas Desulfurization Technique.Wherein Wet Flue Gas Desulfurization Technique possesses the advantages such as the high and reaction speed of desulfuration efficiency is fast, is therefore widely used at desulfuration field.
Wet process of FGD mainly refers to the desulfurization process and desulfurization product process that pulpous state absorbent and liquid-absorbant etc. carry out under wet condition.This sulfur method possesses the advantages such as the high and reaction speed of desulfuration efficiency is fast, but in the process of development, should solve the problem such as smoke temperature drop and fouling timely.The Wet Flue Gas Desulfurization Technique of comparative maturity is mainly sea water desulfuration, double alkali method desulfurizing, calcium-based desulfurization, the ammonia process of desulfurization and Mg-basic desulphuration etc.
Calcium-based desulfurization: the general calcium-based desulfurization technology (lime stone--gypsum) used absorbs the sulfur dioxide contained in flue gas often by lime stone slurry, and react generation calcium sulfite, then become calcium sulfate by the dioxygen oxidation in air.Present stage, calcium-based desulfurization technology is a kind of comparatively ripe sulfur removal technology, and its desulfurization degree has exceeded 90%.Meanwhile, calcium-based desulfurization technology is while possessing the advantages such as the high and efficiency of operational reliability is high, and it also also exists that discharge of wastewater is many, floor space is large, initial investment is large and the drawback such as equipment easy fouling.
Mg-basic desulphuration: Mg-basic desulphuration technology generally selects the magnesia possessing abundant source and good chemical activity to be used as raw material, it is made into slurries, then is absorbed the sulfur dioxide in flue gas by magnesium hydroxide slurry.But magnesium processes desulfur technology possess costly with the drawbacks such as complex process.
The ammonia process of desulfurization: ammonia-process desulfurization technique is generally divided into two steps, i.e. scrubbing CO_2 and oxidative hydrogen ammonium.One, the sulfur dioxide that the object of scrubbing CO_2 is mainly containing in flue gas washs, and flue gas is purified, thus generates ammonium sulfite solution.Its two, the object of oxidative hydrogen ammonium is mainly an ammonium sulfite solution and in atmosphere oxidation reaction occurs, and generates ammonium sulfate, then makes its drying crystalline.Ammonia-process desulfurization technique possesses that desulfuration efficiency is high, technique simple and accessory substance ammonium sulfate can be used as the advantage of chemical fertilizer.But in the process of carrying out desulfurization, when being oxidized ammonium sulfite, then need a large amount of additional energies, thus cause the operating cost of system and energy resource consumption to increase to some extent; And ammonia also possesses volatility, the phenomenons such as the ammonia loss caused therefrom and tail gas pollution, both can impel the utilization rate of ammonia to decrease, and also can cause occurring secondary pollution.These drawbacks more than existed all create restriction to the high-efficient development of ammonia-process desulfurization technique and suppress.
Double alkali method desulfurizing: the advantage that double alkali method desulfurizing technology possesses is mainly and utilizes alkaline absorption solution to realize desulfurization, then generate new absorbing liquid by limestone powder and milk of lime etc.But during operation, sodium sulfite there will be oxidation reaction and generates sodium sulphate, and sodium sulphate is difficult to regeneration, so need to add NaOH or sodium sulfite in system always, this just makes the consumption of alkali increase to a large extent, thus produces serious influence to gypsum quality.
Summary of the invention
(1) technical problem solved
Not enough for prior art, the present invention discloses a kind of Novel dual-alkali method fume desulphurization method and flue gas desulphurization system, solve the Problem of Failure of traditional double alkaline process, system operation time is long, the sodium magnesium dual alkali scrubbing FGD process system that cost of investment is low, desulfurized effect is good, desulfuration efficiency reaches more than 97%.
(2) technical scheme
For realizing above object, the present invention is achieved by the following technical programs:
A kind of Novel dual-alkali method fume desulphurization method, comprises the following steps:
S1, desulfurizing tower absorb SO
2: sulfur-containing smoke gas enters desulfurizing tower, uses NaOH or sodium carbonate as absorbent to the SO in flue gas in desulfurizing tower
2absorb, generate the absorbing liquid containing sodium sulfite and sodium hydrogensulfite;
S2, regenerated reactor absorbing liquid sodium base alkali regenerate: the absorbing liquid that step S1 generates enters regenerated reactor, magnesia or magnesium hydroxide is used to regenerate absorbing liquid in regenerated reactor, magnesia or magnesium hydroxide and sodium sulfite and sodium hydrogensulfite react, the sodium sulfite generated, NaOH, magnesium sulfite carry out precipitate and separate through solid-liquid separator, the sodium sulfite that regeneration is formed or NaOH return desulfurizing tower and carry out smoke absorption again, recycle;
S3, absorbent supplement: to step S1 consume NaOH or sodium carbonate supplement, and step S2 consume magnesia or magnesium hydroxide supplement;
S4, desulfurization product process: enter desulfurization product treatment system to the precipitation magnesium sulfite that step S2 Separation of Solid and Liquid obtains, magnesium sulfite directly discharges or preparing magnesium sulfate.
Preferably, desulfurizing tower described in step S1 is single tower desulfurizing tower or double tower desulfurizing tower, and described double tower desulfurizing tower is divided into first grade desulfurizing tower and two-grade desulfurizing tower.
A kind of Novel dual-alkali method flue gas desulphurization system, described desulphurization system comprises desulfurizing tower, chimney, regenerated reactor, magnesia dissolving tank, lye tank (vat), solid-liquid separator, clear liquid groove and desulfurization product treatment system, the exhanst gas outlet of described desulfurizing tower is connected with described chimney, the liquid outlet of described desulfurizing tower is connected by pipeline with the inlet of regenerated reactor, the described liquid outlet of magnesia dissolving tank is connected by pipeline with the inlet of regenerated reactor, the liquid outlet of described regenerated reactor is connected by pipeline with the inlet of described solid-liquid separator, the liquid outlet of described solid-liquid separator is connected with described clear liquid groove entrance by pipeline, described clear liquid groove purified liquor outlet is connected with the absorbing liquid entrance of described desulfurizing tower by pipeline, described lye tank (vat) inlet is connected by pipeline with described clear liquid groove entrance, the outlet of described solid-liquid separator is connected by pipeline with described desulfurization product treatment system entrance.
Preferably, the liquid outlet place of described desulfurizing tower is provided with metrological service, described metrological service comprises control unit and pH value detecting unit, pH value signal is also delivered to control unit by the liquid pH value in pH value detecting unit signal piping, and control unit receives pH value signal and control and regulation input magnesium hydroxide slurries flow quantity.
(3)
beneficial effect
The present invention discloses a kind of Novel dual-alkali method fume desulphurization method and flue gas desulphurization system, adopts NaOH or sodium carbonate as absorbent to the SO in flue gas in desulfurizing tower
2absorb, generate the absorbing liquid containing sodium sulfite and sodium hydrogensulfite, to SO in flue gas
2absorption efficiency is high, and desulfurized effect is good;
The calcium oxide using magnesia or magnesium hydroxide to substitute in regenerated reactor to use in traditional double alkaline process or calcium hydroxide come sodium sulfite in regenerable absorbent liquid and sodium hydrogensulfite, produce magnesium sulfite, magnesium sulfite can be separated by Direct precipitation, system does not need oxidation, and then the sodium sulfite in system would not be oxidized to sodium sulphate, and sodium sulphate can not be caused to accumulate, system operation time is long, active ingredient in absorbing liquid improves, and then improves absorption efficiency, and desulfuration efficiency reaches more than 97%;
Slurries after regeneration after precipitation, NaOH and Na
2sO
3and the MgSO of oligodynamical
3clear liquid is sent desulfurizing tower back to and is recycled, and material of the present invention can regenerate and recycle, and consumes alkali few, reduce costs NaOH or metabisulfite solution.
Accompanying drawing explanation
Fig. 1 is sodium magnesium double alkali method flue gas desulfurization technology flow chart of the present invention
Fig. 2 is structural representation of the present invention
Fig. 3 is the embodiment of the present invention 2 implementation process schematic diagram
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the embodiment of the present invention and accompanying drawing, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
embodiment 1:
See Fig. 1 and Fig. 2, a kind of Novel dual-alkali method flue gas desulphurization system, comprise desulfurizing tower, chimney, regenerated reactor, magnesia dissolving tank, lye tank (vat), solid-liquid separator, clear liquid groove and desulfurization product treatment system, the exhanst gas outlet of desulfurizing tower is connected with described chimney, the liquid outlet of desulfurizing tower is connected by pipeline with the inlet of regenerated reactor, the liquid outlet of magnesia dissolving tank is connected by pipeline with the inlet of regenerated reactor, the liquid outlet of regenerated reactor is connected by pipeline with the inlet of described solid-liquid separator, the liquid outlet of solid-liquid separator is connected with clear liquid groove entrance by pipeline, clear liquid groove purified liquor outlet is connected with the absorbing liquid entrance of desulfurizing tower by pipeline, lye tank (vat) inlet is connected by pipeline with clear liquid groove entrance, the outlet of solid-liquid separator is connected by pipeline with described desulfurization product treatment system entrance.
A kind of Novel dual-alkali method fume desulphurization method, comprises the following steps:
S1, desulfurizing tower absorb SO
2: sulfur-containing smoke gas enters desulfurizing tower, uses NaOH or sodium carbonate as absorbent to the SO in flue gas in desulfurizing tower
2absorb, generate the absorbing liquid containing sodium sulfite and sodium hydrogensulfite;
S2, regenerated reactor absorbing liquid sodium base alkali regenerate: the absorbing liquid that step S1 generates enters regenerated reactor, magnesia or magnesium hydroxide is used to regenerate absorbing liquid in regenerated reactor, magnesia or magnesium hydroxide and sodium sulfite and sodium hydrogensulfite react, the sodium sulfite generated, NaOH, magnesium sulfite carry out precipitate and separate through solid-liquid separator, the sodium sulfite that regeneration is formed or NaOH return desulfurizing tower and carry out smoke absorption again, recycle;
S3, absorbent supplement: to step S1 consume NaOH or sodium carbonate supplement, and step S2 consume magnesia or magnesium hydroxide supplement;
S4, desulfurization product process: enter desulfurization product treatment system to the precipitation magnesium sulfite that step S2 Separation of Solid and Liquid obtains, magnesium sulfite directly discharges or preparing magnesium sulfate.
Wherein the liquid outlet place of desulfurizing tower is provided with metrological service, metrological service comprises control unit and pH value detecting unit, pH value signal is also delivered to control unit by the liquid pH value in pH value detecting unit signal piping, and control unit receives pH value signal and control and regulation input magnesium hydroxide slurries flow quantity.
embodiment 2:
See Fig. 1 and Fig. 2, a kind of Novel dual-alkali method flue gas desulphurization system, comprise single tower desulfurizing tower, chimney, regenerated reactor, magnesia dissolving tank, lye tank (vat), solid-liquid separator, clear liquid groove and desulfurization product treatment system, the exhanst gas outlet of single tower desulfurizing tower is connected with chimney, the liquid outlet of single tower desulfurizing tower is connected by pipeline with the inlet of regenerated reactor, the liquid outlet of magnesia dissolving tank is connected by pipeline with the inlet of regenerated reactor, the liquid outlet of regenerated reactor is connected by pipeline with the inlet of described solid-liquid separator, the liquid outlet of solid-liquid separator is connected with clear liquid groove entrance by pipeline, clear liquid groove purified liquor outlet is connected with the absorbing liquid entrance of desulfurizing tower by pipeline, lye tank (vat) inlet is connected by pipeline with clear liquid groove entrance, the outlet of solid-liquid separator is connected by pipeline with described desulfurization product treatment system entrance.
A kind of Novel dual-alkali method fume desulphurization method, comprises the following steps:
S1, single tower desulfurizing tower absorb SO
2: sulfur-containing smoke gas enters single tower desulfurizing tower, uses NaOH or sodium carbonate as absorbent to the SO in flue gas in single tower desulfurizing tower
2absorb, generate the absorbing liquid containing sodium sulfite and sodium hydrogensulfite;
S2, regenerated reactor absorbing liquid sodium base alkali regenerate: the absorbing liquid that step S1 generates enters regenerated reactor, magnesia or magnesium hydroxide is used to regenerate absorbing liquid in regenerated reactor, magnesia or magnesium hydroxide and sodium sulfite and sodium hydrogensulfite react, the sodium sulfite generated, NaOH, magnesium sulfite carry out precipitate and separate through solid-liquid separator, the sodium sulfite that regeneration is formed or NaOH return single tower desulfurizing tower and carry out smoke absorption again, recycle;
S3, absorbent supplement: to step S1 consume NaOH or sodium carbonate supplement, and step S2 consume magnesia or magnesium hydroxide supplement;
S4, desulfurization product process: enter desulfurization product treatment system to the precipitation magnesium sulfite that step S2 Separation of Solid and Liquid obtains, magnesium sulfite directly discharges or preparing magnesium sulfate.
Wherein the liquid outlet place of single tower desulfurizing tower is provided with metrological service, metrological service comprises control unit and pH value detecting unit, pH value signal is also delivered to control unit by the liquid pH value in pH value detecting unit signal piping, and control unit receives pH value signal and control and regulation input magnesium hydroxide slurries flow quantity.
embodiment 3:
The present embodiment utilizes novel sodium magnesium dual alkali scrubbing FGD process system to carry out desulfurization, and desulfurizing tower is double tower desulfurizing tower, and sulfur-containing smoke gas enters first grade desulfurizing tower, through two-grade desulfurizing tower, and qualified discharge after desulfurizing agent washing in desulfurizing tower, as shown in Figure 3.
Comprise first grade desulfurizing tower, two-grade desulfurizing tower, chimney, regenerated reactor, magnesia dissolving tank, lye tank (vat), solid-liquid separator and desulfurization product treatment system, two-grade desulfurizing tower entrance is exported with first grade desulfurizing tower and is connected by pipeline, two-level absorption tower outlet is connected with blowdown stack, the liquid outlet of first grade desulfurizing tower is connected by pipeline with the inlet of regenerated reactor, the liquid outlet of magnesia dissolving tank is connected by pipeline with the inlet of regenerated reactor, the liquid outlet of regenerated reactor is connected by pipeline with the inlet of solid-liquid separator, the upper liquid outlet of solid-liquid separator is connected with two-grade desulfurizing tower absorbing liquid entrance by pipeline, lye tank (vat) inlet is connected with two-grade desulfurizing tower absorbing liquid entrance pipe, the lower liquid outlet of solid-liquid separator is connected by pipeline with desulfurization product treatment system entrance.
The liquid outlet place of first grade desulfurizing tower is provided with metrological service, metrological service comprises control unit and pH value detecting unit, pH value signal is also delivered to control unit by the liquid pH value in pH value detecting unit signal piping, and control unit receives pH value signal and control and regulation input magnesium hydroxide slurries flow quantity.
Adopt sodium hydroxide solution as desulfurizing agent, first sulfur-containing smoke gas enters first grade desulfurizing tower and carries out pre-desulfurization, and flue gas, desulfurization product and sodium hydroxide solution enter two-grade desulfurizing tower, to SO in two-grade desulfurizing tower
2carry out double absorption, form the sodium hydroxide solution of sodium sulfite solution and non-complete reaction, directly send into first grade desulfurizing tower, absorb SO further
2, form sodium sulfite solution, the sodium sulfite slurries that the reaction of first grade desulfurizing tower generates are through being pumped into regenerated reactor, magnesia or magnesium hydroxide is used to regenerate absorbing liquid in regenerated reactor, magnesia or magnesium hydroxide and sodium sulfite and sodium hydrogensulfite react, the sodium sulfite generated, NaOH, magnesium sulfite carries out precipitate and separate through solid-liquid separator, because pH value is lower herein, ensure that regeneration efficiency, then enter filter and be separated magnesium sulfite, the clear liquid produced enters two-grade desulfurizing tower, regulate purified liquor outlet pH value by supplementary alkali simultaneously, ensure the absorption efficiency of the second desulfurizing tower, regenerated reactor outlet pump amount is controlled by detecting two-grade desulfurizing tower circulating-pump outlet PH, the sodium sulfite that regeneration is formed or NaOH return single tower desulfurizing tower and carry out smoke absorption again, recycle, the precipitation magnesium sulfite that Separation of Solid and Liquid obtains enters desulfurization product treatment system, magnesium sulfite directly discharges or preparing magnesium sulfate is sold.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit, although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a Novel dual-alkali method fume desulphurization method, is characterized in that, comprises the following steps:
S1, desulfurizing tower absorb SO
2: sulfur-containing smoke gas enters desulfurizing tower, uses NaOH or sodium carbonate as absorbent to the SO in flue gas in desulfurizing tower
2absorb, generate the absorbing liquid containing sodium sulfite and sodium hydrogensulfite;
S2, regenerated reactor absorbing liquid sodium base alkali regenerate: the absorbing liquid that step S1 generates enters regenerated reactor, magnesia or magnesium hydroxide is used to regenerate absorbing liquid in regenerated reactor, magnesia or magnesium hydroxide and sodium sulfite and sodium hydrogensulfite react, the sodium sulfite generated, NaOH, magnesium sulfite carry out precipitate and separate through solid-liquid separator, the sodium sulfite that regeneration is formed or NaOH return desulfurizing tower and carry out smoke absorption again, recycle;
S3, absorbent supplement: to step S1 consume NaOH or sodium carbonate supplement, and step S2 consume magnesia or magnesium hydroxide supplement;
S4, desulfurization product process: enter desulfurization product treatment system to the precipitation magnesium sulfite that step S2 Separation of Solid and Liquid obtains, magnesium sulfite directly discharges or preparing magnesium sulfate.
2. Novel dual-alkali method fume desulphurization method according to claim 1, is characterized in that, desulfurizing tower described in step S1 is single tower desulfurizing tower or double tower desulfurizing tower, and described double tower desulfurizing tower is divided into first grade desulfurizing tower and two-grade desulfurizing tower.
3. a Novel dual-alkali method flue gas desulphurization system, it is characterized in that, described desulphurization system comprises desulfurizing tower, chimney, regenerated reactor, magnesia dissolving tank, lye tank (vat), solid-liquid separator, clear liquid groove and desulfurization product treatment system, the exhanst gas outlet of described desulfurizing tower is connected with described chimney, the liquid outlet of described desulfurizing tower is connected by pipeline with the inlet of regenerated reactor, the described liquid outlet of magnesia dissolving tank is connected by pipeline with the inlet of regenerated reactor, the liquid outlet of described regenerated reactor is connected by pipeline with the inlet of described solid-liquid separator, the liquid outlet of described solid-liquid separator is connected with described clear liquid groove entrance by pipeline, described clear liquid groove purified liquor outlet is connected with the absorbing liquid entrance of described desulfurizing tower by pipeline, described lye tank (vat) inlet is connected by pipeline with described clear liquid groove entrance, the outlet of described solid-liquid separator is connected by pipeline with described desulfurization product treatment system entrance.
4. Novel dual-alkali method flue gas desulphurization system according to claim 3, it is characterized in that, the liquid outlet place of described desulfurizing tower is provided with metrological service, described metrological service comprises control unit and pH value detecting unit, pH value signal is also delivered to control unit by the liquid pH value in pH value detecting unit signal piping, and control unit receives pH value signal and control and regulation input magnesium hydroxide slurries flow quantity.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108380034A (en) * | 2018-05-14 | 2018-08-10 | 大唐环境产业集团股份有限公司 | A kind of the dual alkali scrubbing FGD process system and technique of tower outer circulation |
| CN112961710A (en) * | 2021-03-15 | 2021-06-15 | 中原工学院 | Novel blast furnace gas desulfurization method |
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| US3873532A (en) * | 1973-04-23 | 1975-03-25 | Envirotech Corp | Sulfur dioxide scrubbing process |
| CN101607173A (en) * | 2008-06-17 | 2009-12-23 | 陆泳凯 | The sulfur removal technology of using external regenerative cycle magnesium sulfate method flue gas or waste gas |
| CN103239982A (en) * | 2013-05-24 | 2013-08-14 | 上海交通大学 | Method for dedusting and desulfurizing catalytic-cracking oil refining regenerated flue gas |
| CN205461742U (en) * | 2016-01-29 | 2016-08-17 | 上海鸣泰环保工程有限公司 | Novel dual alkali scrubbing FGD process system |
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2016
- 2016-01-29 CN CN201610062430.5A patent/CN105498503B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873532A (en) * | 1973-04-23 | 1975-03-25 | Envirotech Corp | Sulfur dioxide scrubbing process |
| CN101607173A (en) * | 2008-06-17 | 2009-12-23 | 陆泳凯 | The sulfur removal technology of using external regenerative cycle magnesium sulfate method flue gas or waste gas |
| CN103239982A (en) * | 2013-05-24 | 2013-08-14 | 上海交通大学 | Method for dedusting and desulfurizing catalytic-cracking oil refining regenerated flue gas |
| CN205461742U (en) * | 2016-01-29 | 2016-08-17 | 上海鸣泰环保工程有限公司 | Novel dual alkali scrubbing FGD process system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108380034A (en) * | 2018-05-14 | 2018-08-10 | 大唐环境产业集团股份有限公司 | A kind of the dual alkali scrubbing FGD process system and technique of tower outer circulation |
| CN112961710A (en) * | 2021-03-15 | 2021-06-15 | 中原工学院 | Novel blast furnace gas desulfurization method |
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| CN105498503B (en) | 2018-07-20 |
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