CN105498503B - A kind of dual alkali scrubbing FGD process method and flue gas desulphurization system - Google Patents
A kind of dual alkali scrubbing FGD process method and flue gas desulphurization system Download PDFInfo
- Publication number
- CN105498503B CN105498503B CN201610062430.5A CN201610062430A CN105498503B CN 105498503 B CN105498503 B CN 105498503B CN 201610062430 A CN201610062430 A CN 201610062430A CN 105498503 B CN105498503 B CN 105498503B
- Authority
- CN
- China
- Prior art keywords
- liquid
- desulfurizing tower
- sodium
- magnesium
- sulfite
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (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
A kind of novel dual-alkali method fume desulphurization method of present invention offer and flue gas desulphurization system, are related to flue gases purification field, using sodium hydroxide or sodium carbonate as absorbent to the SO in flue gas2It is absorbed, generate the absorbing liquid containing sodium sulfite and sodium hydrogensulfite, absorbing liquid enters regenerated reactor, absorbing liquid is regenerated using magnesia or magnesium hydroxide in regenerated reactor, precipitation separation is carried out using solid-liquid separator, it regenerates the sodium sulfite formed or sodium hydroxide returns to desulfurizing tower and carries out smoke absorption again, it recycles, it is separated by solid-liquid separation obtained precipitation magnesium sulfite and enters desulfurization product processing system, magnesium sulfite direct emission or preparing magnesium sulfate, the present invention uses sodium magnesium dual alkali scrubbing FGD process, desulfurization effect is good, system need not aoxidize, sodium sulphate accumulation is not had, system operation time is long, and material can be regenerated and be recycled in system, reduce the consumption of alkali, reduce cost.
Description
Technical field
The present invention relates to Chemical Manufactures and field of environment protection, are related to flue gases purification field, are related to using in desulfurization de-
Sulphur device and auxiliary device, more particularly to a kind of novel dual-alkali method flue gas desulphurization system, and in particular 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 generate atmospheric environment very serious pollution, and the serious ecology that destroys is put down
Weighing apparatus, and great harm is produced to the health of animals and plants and the mankind, acid rain can also largely occur, to building
Corroded and is destroyed, it is serious to affect ecological environment and living environment.So being generated to effectively reduce sulfur dioxide
Harm, relevant departments constantly research and develop relevant Treatment process.At this stage, sulfur dioxide pollution is administered
Technological means is mainly flue gas desulfurization, and in the industry, predominantly Wet Flue Gas Desulfurization Technique.Wherein Wet Flue Gas Desulfurization Technique has de-
The advantages that sulphur efficiency is high and reaction speed is fast, therefore be widely used in desulfuration field.
Wet process of FGD generally refers to the desulfurization that pulpous state absorbent and liquid-absorbant etc. carry out under wet condition
Processing and desulfurization product processing.This sulfur method has the advantages such as desulfuration efficiency is high and reaction speed is fast, but is sending out
During exhibition, it should timely be solved to the problems such as smoke temperature drop and fouling.The Wet Flue Gas Desulfurization Technique of comparative maturity
Predominantly sea water desulfuration, double alkali method desulfurizing, calcium-based desulfurization, the ammonia process of desulfurization and Mg-basic desulphuration etc..
Calcium-based desulfurization：The calcium-based desulfurization technology generally used（Lime stone -- gypsum）Often by lime stone slurry pair
The sulfur dioxide contained in flue gas is absorbed, and reacting generates calcium sulfite, then becomes sulphur by the dioxygen oxidation in air
Sour calcium.At this stage, calcium-based desulfurization technology is a kind of more mature sulfur removal technology, and desulfurization degree has been over 90%.Meanwhile
Calcium-based desulfurization technology while having the advantages such as operational reliability is high and efficient, that there is also discharge of wastewater is more,
It takes up a large area, initial investment is big and the drawbacks such as the easy fouling of equipment.
Mg-basic desulphuration：Mg-basic desulphuration technology be typically chosen have abundant source and the active magnesia of good chemical as
Raw material is fabricated to it in slurries, then is absorbed to the sulfur dioxide in flue gas by magnesium hydroxide slurry.But magnesium processes desulfurization
Technology has the drawbacks such as costly and complex process.
The ammonia process of desulfurization：Ammonia-process desulfurization technique is broken generally into two steps, i.e. scrubbing CO_2 and oxidative hydrogen
Ammonium.First, the purpose of scrubbing CO_2 predominantly washs the sulfur dioxide contained in flue gas, flue gas is made to obtain only
Change, to generate ammonium sulfite solution.Second, the purpose of oxidative hydrogen ammonium predominantly ammonium sulfite solution in air
Oxidation reaction occurs, generates ammonium sulfate, then make it dry crystallization.Ammonia-process desulfurization technique has desulfuration efficiency height, technique
Simple and by-product ammonium sulfate can be used as the advantage of chemical fertilizer.But it during carrying out desulfurization, is carried out to ammonium sulfite
When oxidation, then a large amount of additional energy is needed, increased so as to cause the operating cost and energy consumption of system；And ammonia is also
Have volatility, therefrom caused by ammonia loss and phenomena such as tail gas pollution, both the utilization rate of ammonia can be promoted to decrease,
It also results in and secondary pollution occurs.Present on these drawbacks all to the high-efficient development of ammonia-process desulfurization technique produce restriction with
Inhibit.
Double alkali method desulfurizing：The advantage that double alkali method desulfurizing technology has predominantly realizes desulfurization using alkaline absorption solution, then leads to
Cross the new absorbing liquid of the generations such as limestone powder and milk of lime.But when operating, sodium sulfite will appear oxidation reaction generation
Sodium sulphate, and sodium sulphate is difficult regeneration, so needing to add sodium hydroxide either sodium sulfite into system always, this just exists
Increase the consumption of alkali in prodigious degree, to produce serious influence to gypsum quality.
Invention content
（One）The technical issues of solution
In view of the shortcomings of the prior art, the invention discloses a kind of novel dual-alkali method fume desulphurization method and flue gas desulfurization systems
System, solves the Problem of Failure of traditional Dual alkali, and system operation time is long, the double alkali of the sodium magnesium that cost of investment is low, desulfurization effect is good
Method flue gas desulphurization system, desulfuration efficiency reach 97% or more.
（Two）Technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：
A kind of novel dual-alkali method fume desulphurization method, includes the following steps：
S1, desulfurizing tower absorb SO2：Sulfur-containing smoke gas enters desulfurizing tower, and sodium hydroxide or sodium carbonate conduct are used in desulfurizing tower
Absorbent is to the SO in flue gas2It is absorbed, generates the absorbing liquid containing sodium sulfite and sodium hydrogensulfite；
S2, the regeneration of regenerated reactor absorbing liquid sodium base alkali：The absorbing liquid that step S1 is generated enters regenerated reactor, and oxygen is used in regenerated reactor
Change magnesium or magnesium hydroxide regenerates absorbing liquid, magnesia or magnesium hydroxide are reacted with sodium sulfite and sodium hydrogensulfite, raw
At sodium sulfite, sodium hydroxide, magnesium sulfite carry out precipitation separation by solid-liquid separator, regenerate formation sodium sulfite or
Sodium hydroxide returns to desulfurizing tower and carries out smoke absorption again, recycles；
S3, absorbent supplement：The sodium hydroxide or sodium carbonate of step S1 consumption are supplemented and the oxygen of step S2 consumption
Change magnesium or magnesium hydroxide is supplemented；
S4, desulfurization product processing：Desulfurization product processing system is entered to the precipitation magnesium sulfite that step S2 is separated by solid-liquid separation
System, magnesium sulfite direct emission or preparing magnesium sulfate.
Preferably, desulfurizing tower described in step S1 is single column desulfurizing tower or double tower desulfurizing tower, and the double tower desulfurizing tower is divided into one
Grade desulfurizing tower and two-grade desulfurizing tower.
A kind of novel dual-alkali method flue gas desulphurization system, the desulphurization system include desulfurizing tower, chimney, regenerated reactor, magnesia
Dissolving tank, lye tank (vat), solid-liquid separator, liquid tank and desulfurization product processing system, the exhanst gas outlet of the desulfurizing tower with it is described
Chimney connects, and the liquid outlet of the desulfurizing tower is connected with the inlet of regenerated reactor by pipeline, the magnesia dissolving tank
Liquid outlet is connected with the inlet of regenerated reactor by pipeline, the feed liquor of the liquid outlet of the regenerated reactor and the solid-liquid separator
Mouth is connected by pipeline, and the liquid outlet of the solid-liquid separator is connected by pipeline with the liquid tank entrance, described clear
Liquid bath purified liquor outlet is connect by pipeline with the absorbing liquid entrance of the desulfurizing tower, the lye tank (vat) inlet and the liquid tank
Entrance is connected by pipeline, and the outlet of the solid-liquid separator is connected with the desulfurization product processing system entrance by pipeline
It connects.
Preferably, be provided with metrological service at the liquid outlet of the desulfurizing tower, the metrological service include control unit and
PH value signal is simultaneously delivered to control unit, controlled by pH value detection unit, liquid pH value in pH value detection unit signal piping
Unit receives pH value signal and controls to adjust input magnesium hydroxide slurries flow quantity.
（Three）Advantageous effect
The invention discloses a kind of novel dual-alkali method fume desulphurization method and flue gas desulphurization system, hydrogen-oxygen is used in desulfurizing tower
Change sodium or sodium carbonate as absorbent to the SO in flue gas2It is absorbed, generates the suction containing sodium sulfite and sodium hydrogensulfite
Liquid is received, to SO in flue gas2Absorption efficiency is high, and desulfurization effect is good；
The calcium oxide used in traditional Dual alkali is substituted using magnesia or magnesium hydroxide or calcium hydroxide comes in regenerated reactor
Sodium sulfite in regenerable absorbent liquid and sodium hydrogensulfite, produce magnesium sulfite, magnesium sulfite can Direct precipitation separation, system
It need not aoxidize, and then the sodium sulfite in system would not be oxidized to sodium sulphate, sodium sulphate will not be caused to accumulate, system fortune
The row time is long, and the active ingredient in absorbing liquid improves, and then improves absorption efficiency, and desulfuration efficiency reaches 97% or more；
Slurries after regeneration after precipitation, NaOH and Na2SO3And the MgSO of oligodynamical3Clear liquid, which sends desulfurizing tower cycle back to, to be made
With material of the present invention can be regenerated and be recycled, few to sodium hydroxide or metabisulfite solution consumption alkali, reduce cost.
Description of the drawings
Fig. 1 is sodium magnesium double alkali method flue gas desulfurization technology flow chart of the present invention
Fig. 2 is schematic structural view of the invention
Fig. 3 is 2 implementation process schematic diagram of the embodiment of the present invention
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
And attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
The every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment 1：
Referring to Fig. 1 and Fig. 2, a kind of novel dual-alkali method flue gas desulphurization system, including desulfurizing tower, chimney, regenerated reactor, magnesia
Dissolving tank, lye tank (vat), solid-liquid separator, liquid tank and desulfurization product processing system, the exhanst gas outlet of desulfurizing tower and the chimney
Connection, the liquid outlet of desulfurizing tower are connected with the inlet of regenerated reactor by pipeline, the liquid outlet of magnesia dissolving tank and regeneration
The inlet in pond is connected by pipeline, and the liquid outlet of regenerated reactor is connected with the inlet of the solid-liquid separator by pipeline
It connects, the liquid outlet of solid-liquid separator is connected by pipeline with liquid tank entrance, and liquid tank purified liquor outlet passes through pipeline and desulfurization
The absorbing liquid entrance of tower connects, and lye tank (vat) inlet is connected with liquid tank entrance by pipeline, the outlet of solid-liquid separator and
The desulfurization product processing system entrance is connected by pipeline.
A kind of novel dual-alkali method fume desulphurization method, includes the following steps：
S1, desulfurizing tower absorb SO2：Sulfur-containing smoke gas enters desulfurizing tower, and sodium hydroxide or sodium carbonate conduct are used in desulfurizing tower
Absorbent is to the SO in flue gas2It is absorbed, generates the absorbing liquid containing sodium sulfite and sodium hydrogensulfite；
S2, the regeneration of regenerated reactor absorbing liquid sodium base alkali：The absorbing liquid that step S1 is generated enters regenerated reactor, and oxygen is used in regenerated reactor
Change magnesium or magnesium hydroxide regenerates absorbing liquid, magnesia or magnesium hydroxide are reacted with sodium sulfite and sodium hydrogensulfite, raw
At sodium sulfite, sodium hydroxide, magnesium sulfite carry out precipitation separation by solid-liquid separator, regenerate formation sodium sulfite or
Sodium hydroxide returns to desulfurizing tower and carries out smoke absorption again, recycles；
S3, absorbent supplement：The sodium hydroxide or sodium carbonate of step S1 consumption are supplemented and the oxygen of step S2 consumption
Change magnesium or magnesium hydroxide is supplemented；
S4, desulfurization product processing：Desulfurization product processing system is entered to the precipitation magnesium sulfite that step S2 is separated by solid-liquid separation
System, magnesium sulfite direct emission or preparing magnesium sulfate.
Metrological service is wherein provided at the liquid outlet of desulfurizing tower, metrological service includes that control unit and pH value detection are single
PH value signal is simultaneously delivered to control unit by member, liquid pH value in pH value detection unit signal piping, and control unit receives PH
Value signal simultaneously controls to adjust input magnesium hydroxide slurries flow quantity.
Embodiment 2：
Referring to Fig. 1 and Fig. 2, a kind of novel dual-alkali method flue gas desulphurization system, including single column desulfurizing tower, chimney, regenerated reactor, oxygen
Change magnesium dissolving tank, lye tank (vat), solid-liquid separator, liquid tank and desulfurization product processing system, the exhanst gas outlet of single column desulfurizing tower with
Chimney connects, and the liquid outlet of single column desulfurizing tower is connected with the inlet of regenerated reactor by pipeline, and magnesia dissolving tank goes out liquid
Mouth is connected with the inlet of regenerated reactor by pipeline, and the liquid outlet of regenerated reactor and the inlet of the solid-liquid separator pass through pipe
Road is connected, and the liquid outlet of solid-liquid separator is connected by pipeline with liquid tank entrance, and liquid tank purified liquor outlet passes through pipeline
It is connect with the absorbing liquid entrance of desulfurizing tower, lye tank (vat) inlet is connected with liquid tank entrance by pipeline, solid-liquid separator
Outlet is connected with the desulfurization product processing system entrance by pipeline.
A kind of novel dual-alkali method fume desulphurization method, includes the following steps：
S1, single column desulfurizing tower absorb SO2：Sulfur-containing smoke gas enters single column desulfurizing tower, and sodium hydroxide is used in single column desulfurizing tower
Or sodium carbonate as absorbent to the SO in flue gas2It is absorbed, generates the absorbing liquid containing sodium sulfite and sodium hydrogensulfite；
S2, the regeneration of regenerated reactor absorbing liquid sodium base alkali：The absorbing liquid that step S1 is generated enters regenerated reactor, and oxygen is used in regenerated reactor
Change magnesium or magnesium hydroxide regenerates absorbing liquid, magnesia or magnesium hydroxide are reacted with sodium sulfite and sodium hydrogensulfite, raw
At sodium sulfite, sodium hydroxide, magnesium sulfite carry out precipitation separation by solid-liquid separator, regenerate formation sodium sulfite or
Sodium hydroxide returns to single column desulfurizing tower and carries out smoke absorption again, recycles；
S3, absorbent supplement：The sodium hydroxide or sodium carbonate of step S1 consumption are supplemented and the oxygen of step S2 consumption
Change magnesium or magnesium hydroxide is supplemented；
S4, desulfurization product processing：Desulfurization product processing system is entered to the precipitation magnesium sulfite that step S2 is separated by solid-liquid separation
System, magnesium sulfite direct emission or preparing magnesium sulfate.
Metrological service is wherein provided at the liquid outlet of single column desulfurizing tower, metrological service includes control unit and pH value detection
PH value signal is simultaneously delivered to control unit by unit, liquid pH value in pH value detection unit signal piping, and control unit receives
PH value signal simultaneously controls to adjust input magnesium hydroxide slurries flow quantity.
Embodiment 3：
The present embodiment carries out desulfurization using novel sodium magnesium dual alkali scrubbing FGD process system, and desulfurizing tower is double tower desulfurizing tower, is contained
Sulphur flue gas enters first grade desulfurizing tower, by two-grade desulfurizing tower, the qualified discharge after desulfurizing agent washing in desulfurizing tower, such as Fig. 3 institutes
Show.
Including first grade desulfurizing tower, two-grade desulfurizing tower, chimney, regenerated reactor, magnesia dissolving tank, lye tank (vat), solid-liquid separator
With desulfurization product processing system, two-grade desulfurizing tower entrance is exported with first grade desulfurizing tower to be connected by pipeline, two-level absorption tower outlet
It is connect with blowdown stack, the liquid outlet of first grade desulfurizing tower is connected with the inlet of regenerated reactor by pipeline, magnesia dissolving tank
Liquid outlet be connected by pipeline with the inlet of regenerated reactor, the liquid outlet of regenerated reactor and the inlet of solid-liquid separator pass through
Pipeline is connected, and the upper liquid outlet of solid-liquid separator is connected by pipeline with two-grade desulfurizing tower absorbing liquid entrance, lye tank (vat) into
Liquid mouth is connected with two-grade desulfurizing tower absorbing liquid entrance pipe, and lower liquid outlet and the desulfurization product processing system of solid-liquid separator enter
Mouth is connected by pipeline.
Metrological service is provided at the liquid outlet of first grade desulfurizing tower, metrological service includes that control unit and pH value detection are single
PH value signal is simultaneously delivered to control unit by member, liquid pH value in pH value detection unit signal piping, and control unit receives PH
Value signal simultaneously controls to adjust input magnesium hydroxide slurries flow quantity.
Using sodium hydroxide solution as desulfurizing agent, sulfur-containing smoke gas initially enters first grade desulfurizing tower and carries out pre- desulfurization, flue gas,
Desulfurization product and sodium hydroxide solution enter two-grade desulfurizing tower, and two-grade desulfurizing tower is interior to SO2Double absorption is carried out, sulfurous is formed
Acid sodium solution and the sodium hydroxide solution not reacted completely, are sent directly into first grade desulfurizing tower, further absorb SO2, formed sub-
Metabisulfite solution, the sodium sulfite slurries that the reaction of first grade desulfurizing tower generates use oxidation by being pumped into regenerated reactor in regenerated reactor
Magnesium or magnesium hydroxide regenerate absorbing liquid, and magnesia or magnesium hydroxide are reacted with sodium sulfite and sodium hydrogensulfite, generate
Sodium sulfite, sodium hydroxide, magnesium sulfite carry out precipitation separation by solid-liquid separator, since pH value is relatively low herein, ensure
Regeneration efficiency detaches magnesium sulfite subsequently into filter, and the clear liquid of generation enters two-grade desulfurizing tower, while passing through and supplementing alkali
Adjust purified liquor outlet pH value, ensure the absorption efficiency of the second desulfurizing tower, by detect two-grade desulfurizing tower circulating-pump outlet PH come
Regenerated reactor outlet pump amount is controlled, the sodium sulfite of formation is regenerated or sodium hydroxide returns to single column desulfurizing tower and carries out smoke absorption again,
Recycle, the precipitation magnesium sulfite being separated by solid-liquid separation enters desulfurization product processing system, magnesium sulfite direct emission or
Preparing magnesium sulfate is sold.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations, although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (4)
1. a kind of dual alkali scrubbing FGD process method, which is characterized in that include the following steps：
S1, desulfurizing tower absorb SO2：Sulfur-containing smoke gas enters desulfurizing tower, uses sodium hydroxide or sodium carbonate as absorbent in desulfurizing tower
To the SO in flue gas2It is absorbed, generates the absorbing liquid containing sodium sulfite and sodium hydrogensulfite；
S2, the regeneration of regenerated reactor absorbing liquid sodium base alkali：The absorbing liquid that step S1 is generated enters regenerated reactor, and magnesia is used in regenerated reactor
Or magnesium hydroxide regenerates absorbing liquid, magnesia or magnesium hydroxide are reacted with sodium sulfite and sodium hydrogensulfite, generation
Sodium sulfite, sodium hydroxide, magnesium sulfite carry out precipitation separation by solid-liquid separator, regenerate the sodium sulfite or hydrogen-oxygen of formation
Change sodium return desulfurizing tower and carry out smoke absorption again, recycles；
S3, absorbent supplement：The sodium hydroxide or sodium carbonate of step S1 consumption are supplemented and the magnesia of step S2 consumption
Or magnesium hydroxide is supplemented；
S4, desulfurization product processing：Desulfurization product processing system is entered to the precipitation magnesium sulfite that step S2 is separated by solid-liquid separation, it is sub-
Magnesium sulfate direct emission or preparing magnesium sulfate.
2. dual alkali scrubbing FGD process method according to claim 1, which is characterized in that desulfurizing tower described in step S1 is single column
Desulfurizing tower or double tower desulfurizing tower, the double tower desulfurizing tower are divided into first grade desulfurizing tower and two-grade desulfurizing tower.
3. a kind of dual alkali scrubbing FGD process system, which is characterized in that the desulphurization system includes desulfurizing tower, chimney, regenerated reactor, oxygen
Change magnesium dissolving tank, lye tank (vat), solid-liquid separator, liquid tank and desulfurization product processing system, the exhanst gas outlet of the desulfurizing tower with
The chimney connection, the liquid outlet of the desulfurizing tower are connected with the inlet of regenerated reactor by pipeline, the magnesia dissolving
The liquid outlet of slot is connected with the inlet of regenerated reactor by pipeline, the liquid outlet of the regenerated reactor and the solid-liquid separator
Inlet is connected by pipeline, and the liquid outlet of the solid-liquid separator is connected by pipeline with the liquid tank entrance, institute
Liquid tank purified liquor outlet is stated to connect with the absorbing liquid entrance of the desulfurizing tower by pipeline, the lye tank (vat) inlet with it is described clear
Liquid bath entrance is connected by pipeline, and the outlet of the solid-liquid separator passes through pipeline with the desulfurization product processing system entrance
It is connected.
4. dual alkali scrubbing FGD process system according to claim 3, which is characterized in that set at the liquid outlet of the desulfurizing tower
It is equipped with metrological service, the metrological service includes control unit and pH value detection units, in pH value detection unit signal pipings
Liquid pH values and pH value signals are delivered to control unit, control unit receives pH value signals and simultaneously controls to adjust input hydrogen
Magnesia slurry flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610062430.5A CN105498503B (en) | 2016-01-29 | 2016-01-29 | A kind of dual alkali scrubbing FGD process method and flue gas desulphurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610062430.5A CN105498503B (en) | 2016-01-29 | 2016-01-29 | A kind of dual alkali scrubbing FGD process method and flue gas desulphurization system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105498503A CN105498503A (en) | 2016-04-20 |
| CN105498503B true CN105498503B (en) | 2018-07-20 |
Family
ID=55707036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610062430.5A Expired - Fee Related CN105498503B (en) | 2016-01-29 | 2016-01-29 | A kind of dual alkali scrubbing FGD process method and flue gas desulphurization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105498503B (en) |
Families Citing this family (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 |
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 |
-
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105498503A (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102755823B (en) | Method for desulfurizing high-sulphur boiler flue gas to prepare high-purity ammonium bisulfite | |
| CN102160960A (en) | Soda wet desulphurization process and system for sintering flue gas | |
| CN101637685A (en) | Comprehensive treatment method of sulfur-containing flue gas | |
| CN105457477A (en) | Sodium-calcium dual-alkali flue gas desulfurization method and system | |
| CN102357337A (en) | Desulphurization technology through sodium-calcium dual-alkali method | |
| CN106178896A (en) | The desulfurizer of a kind of ammonia circulation utilization and method | |
| CN103977689A (en) | Device and method for removing sulfur dioxide in smoke by two-step alkalifying reproducing and sodium sulfite method | |
| CN106512678A (en) | Flue gas desulfurization and decarbonization device and flue gas desulfurization and decarbonization method | |
| CN105080327A (en) | Method for desulfurizing and recovering NOx with alkali liquor | |
| CN205461742U (en) | Novel dual alkali scrubbing FGD process system | |
| CN102284238A (en) | Bialkali-method flue-gas desulphurization process | |
| CN106512697A (en) | Limestone-lime combined flue gas desulfurization device | |
| CN102228783B (en) | Process for removing sulfur dioxide in smoke by using white mud and its apparatus | |
| CN105498503B (en) | A kind of dual alkali scrubbing FGD process method and flue gas desulphurization system | |
| CN103861426B (en) | A kind of flue gas desulfurization and dedusting also reclaims the method for sodium sulfite | |
| CN2845897Y (en) | Liquid-column tower smoke desulfurizing device | |
| CN105251336B (en) | Sodalime double alkali method double circulation desulphurization technique and system | |
| CN201132104Y (en) | Desulfurizing device via method for oxidizing lime/carbide mud residue -gypsum out of the tower | |
| CN201578988U (en) | Double circulation double alkali method flue gas desulfurization device | |
| CN202700350U (en) | Device for desulfurizing flue gas by using sodium-calcium dual alkali method | |
| CN103585875A (en) | Compound desulphurization process for paper-making middle-stage wastewater and white mud | |
| CN210814688U (en) | Tail gas treatment system in sulfuric acid preparation process | |
| CN106994292A (en) | A kind of desulfurizing agent and its application, and using the desulphurization system of the desulfurizing agent | |
| CN211487169U (en) | Sodium-alkali method desulphurization device | |
| CN220878343U (en) | Flue gas desulfurization by sodium-alkali method and absorption liquid regeneration system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210209 Address after: 244000 No.105, building 37, world garden, Tongguanshan District, Tongling City, Anhui Province Patentee after: Liu Anming Address before: 201713 room 314, area E, 3rd floor, No.98, Lane 901, KANGYE Road, Zhujiajiao Town, Qingpu District, Shanghai Patentee before: Shanghai Mingtai Environmental Protection Engineering Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180720 Termination date: 20220129 |