CN112138520A - Novel membrane method flue gas desulfurization method and desulfurization device - Google Patents
Novel membrane method flue gas desulfurization method and desulfurization device Download PDFInfo
- Publication number
- CN112138520A CN112138520A CN201910564479.4A CN201910564479A CN112138520A CN 112138520 A CN112138520 A CN 112138520A CN 201910564479 A CN201910564479 A CN 201910564479A CN 112138520 A CN112138520 A CN 112138520A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- magnesium
- cloth bag
- powder
- neutralizer
- 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.)
- Pending
Links
Images
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
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
-
- 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)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a novel membrane method flue gas desulfurization method and a desulfurization device.A layer of reaction film is formed by attaching magnesium-based composite neutralizer dry powder to the surface of a cloth bag; the magnesium-based composite neutralizer comprises magnesium oxide, a free radical initiator and active silicon powder; the flue gas is subjected to desulphurization treatment through a cloth bag. A powder bin is arranged at the smoke inlet of the cloth bag filter, and a Roots blower is arranged on a pipeline connecting the powder bin and the smoke inlet. The magnesium-based composite neutralizer has strong adsorbability and can adsorb sulfur dioxide and supersaturated water vapor in flue gas in the reaction process of the free radical initiator and the active silicon powder to ensure that magnesium oxide is bonded with water and sulfur dioxide molecules to generate a combination reaction, thereby achieving the aim of desulfurization.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization, in particular to a novel membrane method flue gas desulfurization method and a desulfurization device.
Background
At present, increasingly serious atmospheric pollution threatens the health of people, and the main pollutants in the air comprise sulfur dioxide, nitrogen oxide, particulate pollutants and acid rain. Sulfur dioxide is primarily produced by the combustion of sulfur-containing materials such as coal and fuel oil, and secondarily from nature, such as volcanic eruption and forest fires. Sulfur dioxide has strong irritation to conjunctiva and upper respiratory mucosa, and can damage respiratory organs and cause bronchitis, pneumonia, and even pulmonary edema and respiratory paralysis. The death rate of the old or chronic patients who are exposed to the air with the sulfur dioxide concentration of 0.5 mg/cubic meter in a short time is increased, and the disease condition of the patients with respiratory diseases can be worsened if the concentration is higher than 0.25 mg/cubic meter. Respiratory disorders increase in people exposed to concentrations of 0.1 mg/cubic meter of air over time. In addition, sulfur dioxide is easy to corrode metal materials, house buildings, cotton spinning chemical fabrics, leather paper and other products, so that the products are peeled off and faded to be damaged, and plant leaves can turn yellow and even die.
With the national environmental emphasis, a plurality of emission standards for flue gas desulfurization are proposed in sequence. Under the increasingly strict requirements of the atmospheric pollutant emission standard, the desulphurization device constructed before can not meet the current standard, and the single desulphurization device can hardly meet the ultralow emission requirement, so that the desulphurization technology needs to be modified, and the requirement of ultralow emission of sulfur dioxide is met at the cost-saving condition.
Disclosure of Invention
The invention aims to solve the problems and provides a novel membrane-method flue gas desulfurization method and a novel membrane-method flue gas desulfurization device, which can be used for flue gas desulfurization treatment and improve the desulfurization effect.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a novel flue gas desulfurization method by a membrane method is characterized in that magnesium-based composite neutralizer dry powder is attached to the surface of a cloth bag to form a layer of reaction film;
the magnesium-based composite neutralizer comprises magnesium oxide, a free radical initiator and active silicon powder;
the flue gas is subjected to desulphurization treatment through a cloth bag.
Further, the radical initiator is a water-soluble azo initiator.
Further, the mass ratio of the magnesium oxide, the free radical initiator and the active silicon powder in the magnesium-based composite neutralizer is (7-8): 1-2): 1, and the magnesium oxide, the free radical initiator and the active silicon powder are uniformly mixed and then ground to 325 meshes and sieved.
The desulfurizing device using the membrane method flue gas desulfurization method is characterized in that a powder bin is arranged at the smoke inlet of the cloth bag filter, and a Roots blower is arranged on a pipeline connecting the powder bin and the smoke inlet.
Compared with the prior art, the invention has the following beneficial effects:
the invention has the characteristics of improved desulfurization efficiency, stable operation, short construction period and low cost.
The invention is a membrane desulfurization method, and is suitable for flue gas temperature of 45-140 ℃. Firstly, spraying magnesium-based composite neutralizer dry powder into a flue to mix and react with flue gas, then enabling the flue gas and the dry powder mixture to enter a cloth bag filter together to form a layer of reaction film through a powder suspension fluidization process, enabling the dry powder to be attached to the surface of a cloth bag, enabling the flue gas to pass through the surface of the cloth bag through the film to be discharged into next equipment, fully reacting sulfur dioxide in the flue gas with a desulfurizer in the film in the process to complete a desulfurization process, and finally filtering and collecting reaction products by a special cloth bag collection reactor to meet the requirement of removing the sulfur dioxide.
The magnesium-based composite neutralizer has strong adsorbability and can adsorb sulfur dioxide and supersaturated water vapor in flue gas in the reaction process of the free radical initiator and the active silicon powder to ensure that magnesium oxide is bonded with water and sulfur dioxide molecules to generate a combination reaction, thereby achieving the aim of desulfurization.
The reaction principle is as follows:
SO2+H2O=H2SO3
H2SO3+MgO=MgSO3+H2O
2MgSO3+O2=2MgSO4
the invention is characterized in that: the method has the advantages of high desulfurization efficiency, low investment, low energy consumption, short construction period, wide fuel application, suitability for the transformation of large, medium and small boilers and low operation and maintenance cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a structural diagram of a flue gas desulfurization device by a membrane method.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
The first embodiment is as follows: novel membrane method flue gas desulfurization method
In the specific embodiment, the free radical initiator is azodiisobutyramidine hydrochloride (AIBA), and the magnesium oxide, the free radical initiator and the active silicon powder are mixed according to the mass ratio of 7:2:1, ground to 325 meshes and sieved to prepare the magnesium-based composite neutralizer dry powder.
Spraying magnesium-based composite neutralizer dry powder into a flue to mix and react with the flue gas, then enabling the flue gas and the dry powder mixture to enter a cloth bag filter together to form a layer of reaction film through a powder suspension fluidization process, enabling the dry powder to be attached to the surface of the cloth bag, enabling the flue gas to pass through the surface of the cloth bag through the film to be discharged into next equipment, fully reacting sulfur dioxide in the flue gas with a desulfurizing agent in the film in the process to complete a desulfurization process, and finally filtering and collecting reaction products by the cloth bag filter to meet the requirement of removing the sulfur dioxide.
In the preparation process of the active silicon powder according to the embodiment, the active silicon powder is prepared by adding negatively charged colloidal particles generated by the reaction of a sodium silicate solution and an acidic substance into water to form a long-chain inorganic polymer and then concentrating.
The second embodiment is as follows: novel membrane method flue gas desulfurization method
In the specific embodiment, the free radical initiator is azobisisobutyrimidazoline hydrochloride (AIBI), and the magnesium oxide, the free radical initiator and the active silicon powder are mixed according to the mass ratio of 8:1:1, ground to 325 meshes and sieved to prepare the magnesium-based composite neutralizer dry powder.
Spraying magnesium-based composite neutralizer dry powder into a flue to mix and react with the flue gas, then enabling the flue gas and the dry powder mixture to enter a cloth bag filter together to form a layer of reaction film through a powder suspension fluidization process, enabling the dry powder to be attached to the surface of the cloth bag, enabling the flue gas to pass through the surface of the cloth bag through the film to be discharged into next equipment, fully reacting sulfur dioxide in the flue gas with a desulfurizing agent in the film in the process to complete a desulfurization process, and finally filtering and collecting reaction products by the cloth bag filter to meet the requirement of removing the sulfur dioxide.
The third concrete embodiment: novel embrane method flue gas desulfurization device
Referring to the attached figure 1 of the specification, a powder bin 2 is arranged on a smoke inlet pipeline of a cloth bag filter 1, a Roots blower 3 is arranged on a pipeline connected with the smoke inlet and the powder bin 2, the powder bin 2 is in threaded connection with the pipeline, the powder bin is convenient to disassemble, powder is contained, the Roots blower 3 is blown into the cloth bag filter 1 along with smoke, magnesium-based composite neutralizer dry powder is attached to the surface of a cloth bag to form a layer of reaction film, the smoke must pass through the surface of the cloth bag through the film to be discharged into next equipment, sulfur dioxide in the smoke fully reacts with a desulfurizer in the film to complete a desulfurization process, and finally reaction products are filtered and collected by the cloth bag filter to meet the requirement of removing the sulfur dioxide.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, that the preferred embodiments of the present invention are described above and the present invention is not limited to the preferred embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the present invention and these changes and modifications are within the scope of the invention as claimed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A novel flue gas desulfurization method by a membrane method is characterized in that magnesium-based composite neutralizer dry powder is attached to the surface of a cloth bag to form a layer of reaction film;
the magnesium-based composite neutralizer comprises magnesium oxide, a free radical initiator and active silicon powder;
the flue gas is subjected to desulphurization treatment through a cloth bag.
2. The novel membrane method flue gas desulfurization method as defined in claim 1, wherein the radical initiator is a water-soluble azo initiator.
3. The novel membrane-process flue gas desulfurization method as claimed in claim 1, wherein the mass ratio of the magnesium oxide, the radical initiator and the active silicon powder in the magnesium-based composite neutralizer is (7-8): 1-2): 1, and the magnesium oxide, the radical initiator and the active silicon powder are uniformly mixed and then ground to 325 meshes and sieved.
4. The desulfurizing device using the membrane method flue gas desulfurization method is characterized in that a powder bin is arranged at the smoke inlet of the cloth bag filter, and a Roots blower is arranged on a pipeline connecting the powder bin and the smoke inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910564479.4A CN112138520A (en) | 2019-06-27 | 2019-06-27 | Novel membrane method flue gas desulfurization method and desulfurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910564479.4A CN112138520A (en) | 2019-06-27 | 2019-06-27 | Novel membrane method flue gas desulfurization method and desulfurization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112138520A true CN112138520A (en) | 2020-12-29 |
Family
ID=73868478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910564479.4A Pending CN112138520A (en) | 2019-06-27 | 2019-06-27 | Novel membrane method flue gas desulfurization method and desulfurization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112138520A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604269A (en) * | 1985-03-22 | 1986-08-05 | Conoco Inc. | Flue gas desulfurization process |
| CN207413005U (en) * | 2017-09-28 | 2018-05-29 | 山东日丽环保科技有限公司 | A kind of dust pelletizing system of alkaline process filter aid |
| CN109529461A (en) * | 2018-11-21 | 2019-03-29 | 江苏瑞洁环境工程科技有限责任公司 | A kind of filter bag internal layer desulfurization treatment process |
-
2019
- 2019-06-27 CN CN201910564479.4A patent/CN112138520A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604269A (en) * | 1985-03-22 | 1986-08-05 | Conoco Inc. | Flue gas desulfurization process |
| CN207413005U (en) * | 2017-09-28 | 2018-05-29 | 山东日丽环保科技有限公司 | A kind of dust pelletizing system of alkaline process filter aid |
| CN109529461A (en) * | 2018-11-21 | 2019-03-29 | 江苏瑞洁环境工程科技有限责任公司 | A kind of filter bag internal layer desulfurization treatment process |
Non-Patent Citations (1)
| Title |
|---|
| 俞勇梅 等: "静电除尘器前喷吹纳米微孔活性硅对二噁英的去除作用", 《宝钢技术（第5期）》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208372814U (en) | A kind of dry method desulfuration system | |
| Graedel et al. | The changing atmosphere | |
| CN101732977B (en) | Device and method for enhancing removal of fine particle substances in flue gas desulfurization process of fire coal | |
| WO2015161671A1 (en) | Polluted air purification system and working method therefor | |
| CN101219333A (en) | Method and device for cooperation-removal of PM2,5 in flue gas wet desulphurization | |
| CN102430478A (en) | Device and method for removing PM 2.5 from smoke | |
| CN110016374B (en) | Method and equipment for directly separating H2S in natural gas by hydrate method at well head | |
| CN107617319A (en) | A kind of ultra-clean environment protection treating island of coal-fired boiler tail gas | |
| CN201105202Y (en) | Device for synergetic removing fine grains in flue gas wet desulfurization | |
| CN203955012U (en) | The system of boiler completing combustion decarburization and flue gas desulfurization and dedusting | |
| CN206793410U (en) | A kind of power plant's denitrification apparatus | |
| CN109663432A (en) | A kind of city bubble clarifier | |
| CN105771531B (en) | A kind of chemical agglomeration promotor | |
| CN114229852A (en) | Method for removing SO in flue gas by using steel slag2Method for synergistically extracting silica gel | |
| WO2020258588A1 (en) | Heterogeneous coagulation adsorbent for heavy metal adsorption, preparation method and application thereof | |
| CN103933813A (en) | Combined dust removing and defogging device for smoke | |
| CN112138520A (en) | Novel membrane method flue gas desulfurization method and desulfurization device | |
| CN202270577U (en) | Device for removing PM2.5 (particle matter less than 2.5 micrometers in diameter) in smoke | |
| CN206295800U (en) | A kind of semi-dry flue gas desulfurization device | |
| CN109028982A (en) | A kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system and sulfur method | |
| CN109621694A (en) | The treatment process of amino acid fermentation generation tail gas | |
| CN205979845U (en) | Coal -fired mercury control system | |
| CN109432998A (en) | A kind of flue gas disappears white system and method | |
| CN202289838U (en) | Tail gas treatment device for sebacic acid | |
| CN207680334U (en) | A kind of ultra-clean environment protection treating island of coal-fired boiler tail gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201229 |