CN107297144B - Desulfurization and denitrification agent and preparation method and application thereof - Google Patents
Desulfurization and denitrification agent and preparation method and application thereof Download PDFInfo
- Publication number
- CN107297144B CN107297144B CN201710709491.0A CN201710709491A CN107297144B CN 107297144 B CN107297144 B CN 107297144B CN 201710709491 A CN201710709491 A CN 201710709491A CN 107297144 B CN107297144 B CN 107297144B
- Authority
- CN
- China
- Prior art keywords
- desulfurization
- parts
- denitrification
- dissolving
- agent
- 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.)
- Active
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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8637—Simultaneously removing sulfur oxides and nitrogen 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
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen 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
- B01D53/74—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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8634—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/70—Organic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
-
- 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
Abstract
The invention discloses a desulfurization and denitrification agent, which comprises, by weight, 1-15% of cyanuric acid, 1-15% of cosolvent, 1-20% of catalyst, 0-10% of chelating agent, 1-20% of stabilizer and 50-95% of water, wherein the catalyst is one or more of sodium hypochlorite, calcium hypochlorite, trichloroisocyanuric acid, sodium dichloroisocyanurate, sodium chlorite, sodium chlorate and dibromohydantoin. The invention also discloses a method for desulfurization and denitrification by using the desulfurization and denitrification agent. The desulfurization and denitrification agent disclosed by the invention is low in cost, simple and easy to obtain, can realize efficient desulfurization and denitrification at low temperature, avoids the problem of secondary pollution caused by denitrification by gas generated by pyrolysis, and is suitable for large-scale application.
Description
Technical Field
The invention relates to the field of waste gas desulfurization and denitration, in particular to a desulfurization and denitration agent and a preparation method and application thereof.
Background
With the development of economy in China, environmental pollution caused by energy consumption is more and more serious. Among them, the destruction of atmospheric smoke, acid rain, greenhouse effect and ozone layer has become four killers harmful to the survival of people. Harmful substances such as smoke dust, sulfur dioxide, nitrogen oxides and the like contained in waste gas generated by industrial combustion are main sources of air pollution, acid rain and greenhouse effect. Therefore, dust removal, desulfurization and denitrification become the subjects of the exhaust gas treatment nowadays. At present, most of the technologies are to separately treat desulfurization and denitrification, so that the investment of fixed equipment is increased, and the operation cost is also increased. In addition, for denitration, the existing denitration technology is mainly SCR and SNCR technology, ammonia and oxynitride are used for reacting to remove oxynitride, so that ammonia is involved in the using process, potential safety hazards are easily generated under the high-temperature condition, the fixed investment and the running cost of the two technologies are high, key equipment, catalysts and other raw materials are required to be imported, the denitration cost is severely restricted by the factors, and the atmospheric treatment cost in China is severely restricted.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a catalyst which is low in cost, simple and easy to obtain and can realize efficient desulfurization and denitrification.
The technical scheme is as follows: the invention provides a desulfurization and denitrification agent, which comprises cyanuric acid, a cosolvent, a catalyst, a chelating agent, a stabilizer and water; the catalyst is one or more of sodium hypochlorite, calcium hypochlorite, trichloroisocyanuric acid, sodium dichloroisocyanurate, sodium chlorite, sodium chlorate and dibromohydantoin.
The catalyst in the scheme has the function of oxidizing a large amount of nitric oxide actually existing in the flue gas into hydrophilic nitrogen dioxide, and then the nitrogen dioxide reacts with cyanuric acid under an alkaline condition; cyanuric acid is easy to open a ring and react with nitrogen dioxide under alkaline conditions, and the desulfurization and denitrification agent can realize high-efficiency denitrification of flue gas by the principle.
The desulfurization and denitrification agent comprises the following components in parts by weight: 1-15% of cyanuric acid, 1-15% of cosolvent, 1-20% of catalyst, 0-10% of chelating agent, 1-20% of stabilizer and 50-95% of water.
The cosolvent is one or more of sodium carbonate, sodium hydroxide and potassium hydroxide.
The chelating agent is one or more of EDTA (ethylene diamine tetraacetic acid) and ethylenediamine.
The stabilizer is one or more of sodium dihydrogen phosphate, disodium hydrogen phosphate and trisodium phosphate.
The water is purified water.
The preparation method of the desulfurization and denitrification agent comprises the following steps: dissolving the cosolvent in water, heating to 50-100 ℃, adding cyanuric acid for dissolving, cooling, adding a catalyst, a chelating agent and a stabilizer, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
The invention also provides a method for desulfurization and denitrification by using the desulfurization and denitrification agent, which is characterized in that the denitrification agent is directly sprayed into flue gas and reacts at the temperature of 20-90 ℃ to realize high-efficiency desulfurization and denitrification.
Compared with the prior art, the desulfurization and denitrification agent disclosed by the invention has the following beneficial effects:
1. can realize high-efficient SOx/NOx control, SOx/NOx control efficiency all reaches more than 90%, can reach the zero release even.
2. Can realize low temperature SOx/NOx control, can realize SOx/NOx control even normal atmospheric temperature.
3. The problem of secondary pollution caused by denitration by gas generated by pyrolysis can be avoided; no matter ammonia gas or gas generated by pyrolysis of urea and cyanuric acid is used for denitration, the problem of secondary pollution of unreacted ammonia gas cannot be avoided, and the method can well solve the problem without subsequent pollution.
Detailed Description
Example 1
Dissolving 15 parts of sodium carbonate in 50 parts of water, heating to 75 ℃, adding 15 parts of cyanuric acid for dissolving, cooling to room temperature, adding 9 parts of sodium hypochlorite, 1 part of EDTA and 10 parts of sodium dihydrogen phosphate, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
Example 2
Dissolving 10 parts of sodium hydroxide in 45 parts of water, heating to 60 ℃, adding 10 parts of cyanuric acid for dissolving, cooling to room temperature, adding 20 parts of calcium hypochlorite, 5 parts of EDTA and 10 parts of sodium dihydrogen phosphate, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
Example 3
Dissolving 1 part of potassium hydroxide in 95 parts of water, heating to 50 ℃, adding 1 part of cyanuric acid for dissolving, cooling to room temperature, adding 1 part of trichloroisocyanuric acid, 1 part of ethylenediamine and 1 part of disodium hydrogen phosphate, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
Example 4
Dissolving 10 parts of sodium hydroxide in 69 parts of water, heating to 70 ℃, adding 8 parts of cyanuric acid for dissolving, cooling to room temperature, adding 5 parts of sodium dichloroisocyanurate, 3 parts of EDTA and 5 parts of trisodium phosphate, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
Example 5
Dissolving 5 parts of sodium hydroxide in 77 parts of water, heating to 75 ℃, adding 5 parts of cyanuric acid for dissolving, cooling to room temperature, adding 3 parts of sodium chlorite, 5 parts of trisodium phosphate and 5 parts of sodium dihydrogen phosphate, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
Example 6
Dissolving 15 parts of sodium hydroxide in 61 parts of water, heating to 90 ℃, adding 5 parts of cyanuric acid for dissolving, cooling to room temperature, adding 9 parts of sodium chlorate and 10 parts of sodium dihydrogen phosphate, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
Example 7
Dissolving 5 parts of sodium hydroxide in 50 parts of water, heating to 80 ℃, adding 10 parts of cyanuric acid for dissolving, cooling to room temperature, adding 15 parts of dibromohydantoin, 10 parts of ethylenediamine and 10 parts of sodium dihydrogen phosphate, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
Comparative example 1
Dissolving 5 parts of sodium hydroxide in 50 parts of water, heating to 80 ℃, adding 25 parts of cyanuric acid for dissolving, cooling to room temperature, adding 10 parts of ethylenediamine and 10 parts of sodium dihydrogen phosphate, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
Example 8
The desulfurization and denitrification agents of examples 1 to 7 and comparative example 1 were prepared into 500ml of a solution with 1% cyanuric acid concentration with water, the prepared solution was directly sprayed into flue gas artificially prepared at 80 ℃, the flue gas contained 200ppm of sulfur dioxide and 800ppm of nitrogen oxides, and then the outlet flue gas was monitored on line, so as to observe the effects of the desulfurization and denitrification agents, as shown in table 1.
TABLE 1
Example 9
The desulfurization and denitrification agents of examples 1 to 7 and comparative example 1 were prepared into 500ml of a solution with 1% cyanuric acid concentration with water, the prepared solution was directly sprayed into flue gas artificially prepared at 50 ℃, the flue gas contained 200ppm of sulfur dioxide and 800ppm of nitrogen oxides, and then the outlet flue gas was monitored on line, thereby observing the effects of the desulfurization and denitrification agents, as shown in table 2.
TABLE 2
Example 10
The desulfurization and denitrification agents of examples 1 to 7 and comparative example 1 were prepared into 500ml of a solution with 1% cyanuric acid concentration with water, the prepared solution was directly sprayed into a flue gas artificially prepared at 20 ℃, the flue gas contained 200ppm of sulfur dioxide and 800ppm of nitrogen oxides, and then the outlet flue gas was monitored on line, thereby observing the effects of the desulfurization and denitrification agents, as shown in table 3.
TABLE 3
Note: the parts of each substance in the examples of the present invention refer to parts by mass.
Claims (2)
1. The desulfurization and denitrification agent is characterized by comprising the following components in parts by weight: the desulfurization and denitrification agent comprises, by weight, 10% of cyanuric acid, 5% of sodium hydroxide, 15% of dibromohydantoin, 10% of ethylenediamine, 10% of sodium dihydrogen phosphate and 50% of water, and the preparation method of the desulfurization and denitrification agent comprises the following steps: dissolving 5 parts of sodium hydroxide in 50 parts of water, heating to 80 ℃, adding 10 parts of cyanuric acid for dissolving, cooling to room temperature, adding 15 parts of dibromohydantoin, 10 parts of ethylenediamine and 10 parts of sodium dihydrogen phosphate, stirring for dissolving, and filtering to obtain the desulfurization and denitrification agent.
2. A method for desulfurization and denitrification by using the desulfurization and denitrification agent as described in claim 1, which comprises directly spraying the desulfurization and denitrification agent into flue gas, and performing desulfurization and denitrification at 20-90 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710709491.0A CN107297144B (en) | 2017-08-17 | 2017-08-17 | Desulfurization and denitrification agent and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710709491.0A CN107297144B (en) | 2017-08-17 | 2017-08-17 | Desulfurization and denitrification agent and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107297144A CN107297144A (en) | 2017-10-27 |
| CN107297144B true CN107297144B (en) | 2020-06-12 |
Family
ID=60131888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710709491.0A Active CN107297144B (en) | 2017-08-17 | 2017-08-17 | Desulfurization and denitrification agent and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107297144B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108654311A (en) * | 2018-04-26 | 2018-10-16 | 德施普科技发展温州有限公司 | A kind of high-efficiency desulfurization denitration absorbent and preparation method thereof |
| CN109701380A (en) * | 2018-12-28 | 2019-05-03 | 山东大明消毒科技有限公司 | Application of the cyanuric acid in SCCR denitration and the SCCR denitrating technique method based on cyanuric acid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843574A (en) * | 2006-03-29 | 2006-10-11 | 华北电力大学 | Liquid phase flue gas desulfurizing and denitrifying purification method and apparatus |
| CN101352647A (en) * | 2008-09-08 | 2009-01-28 | 环境保护部华南环境科学研究所 | Simultaneous desulfuration and denitration technique by wet flue gas method |
| CN102350208A (en) * | 2011-06-30 | 2012-02-15 | 华北电力大学（保定） | Flue gas absorbent which simultaneously has functions of desulphurization and denitration and preparation method and application thereof |
| CN103816789A (en) * | 2014-02-14 | 2014-05-28 | 山东紫晶光电新材料有限公司 | Alkaline denitration absorbent |
-
2017
- 2017-08-17 CN CN201710709491.0A patent/CN107297144B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843574A (en) * | 2006-03-29 | 2006-10-11 | 华北电力大学 | Liquid phase flue gas desulfurizing and denitrifying purification method and apparatus |
| CN101352647A (en) * | 2008-09-08 | 2009-01-28 | 环境保护部华南环境科学研究所 | Simultaneous desulfuration and denitration technique by wet flue gas method |
| CN102350208A (en) * | 2011-06-30 | 2012-02-15 | 华北电力大学（保定） | Flue gas absorbent which simultaneously has functions of desulphurization and denitration and preparation method and application thereof |
| CN103816789A (en) * | 2014-02-14 | 2014-05-28 | 山东紫晶光电新材料有限公司 | Alkaline denitration absorbent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107297144A (en) | 2017-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102489149B (en) | Flue-gas purification handling method | |
| CA2990085C (en) | Method and apparatus for removing nitrogen oxide and sulfur dioxide from gas streams | |
| CN105289228B (en) | A kind of industrial smoke coordinated desulfurization method of denitration | |
| CN107297144B (en) | Desulfurization and denitrification agent and preparation method and application thereof | |
| CN107261805B (en) | Hydrazine solution special for chimney flue gas desulfurization and denitrification and preparation method thereof | |
| CN105126608A (en) | Method for treating nitrogen oxides | |
| CN102716647A (en) | Method for treating NOx-containing waste gas and system thereof | |
| CN110404404A (en) | A kind of high chlorine incineration flue gas synergistic purification technique of high-sulfur | |
| CN212369892U (en) | System for incinerating byproduct hydrochloric acid in flue gas desulfurization and denitrification | |
| CN104857998A (en) | Efficient regenerating method for As-poisoned denitration catalyst | |
| WO2021134927A1 (en) | Dry process of integrated flue gas desulfurization and denitration | |
| CN102806083B (en) | Catalyst for removing nitrogen oxide in high-temperature flue gas containing sulfur oxide and preparation method | |
| CN210171198U (en) | Flue gas wet denitration system based on physical adsorption pre-oxidation | |
| CN111249873A (en) | Device and method for dry desulfurization and SCR low-temperature denitration of lime kiln flue gas SDS | |
| CN204093282U (en) | A kind for the treatment of apparatus utilizing ozonization to remove nitrogen oxide | |
| CN107096578B (en) | Regeneration method of arsenic poisoning SCR denitration catalyst | |
| CN111359398B (en) | Method for denitration and whitening of flue gas | |
| CN114887475A (en) | Tail gas treatment method for lithium battery material production | |
| CN104548877A (en) | Preparation method of compound absorbent capable of realizing desulfurization and denitrification simultaneously | |
| CN111715050B (en) | Method for improving urea denitration efficiency by adopting alkaline alcohol solution | |
| CN202725025U (en) | Waste gas purifying treatment device | |
| CN103341306B (en) | A kind of method of poor ammonia SNCR reduction and oxidative absorption combined denitration demercuration | |
| CN208526306U (en) | One kind being based on minimum discharge fume treatment running gear | |
| CN104959145A (en) | Solid catalyst used for denitration of coal-fired flue gas | |
| CN104998488A (en) | Method for treating coal-fired flue gas pollutant |
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 | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shao Teng Inventor after: Sun Guoxin Inventor after: Shao Changyin Inventor after: Qin Zhenyi Inventor after: Ekuyoshi Hiroshi Inventor after: Li Junhua Inventor after: Yang Qilei Inventor after: Jin Zhiju Inventor before: Shao Teng Inventor before: Sun Guoxin Inventor before: Shao Changyin Inventor before: Qin Zhenyi Inventor before: Zhai Yandong |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |