CN109499326A - A kind of method of flue gas desulfurization and denitrification - Google Patents
A kind of method of flue gas desulfurization and denitrification Download PDFInfo
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- CN109499326A CN109499326A CN201811524290.4A CN201811524290A CN109499326A CN 109499326 A CN109499326 A CN 109499326A CN 201811524290 A CN201811524290 A CN 201811524290A CN 109499326 A CN109499326 A CN 109499326A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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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
- B01D53/007—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 by irradiation
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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
- B01D53/507—Sulfur oxides by treating the gases with other liquids
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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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
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- 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
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- 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
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- 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
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
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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
Abstract
The present invention relates to a kind of method of flue gas desulfurization and denitrification, raw material and its removal methods are prepared the following steps are included: S1, sorting: selects distilled water, boiling is boiled；S2 is selected: selecting FeCl3Solution；S3, FeCl3Solution instills in boiling water, and continues to boil to bronzing liquid is generated, and desulfurizing agent can be obtained；S4 in the desulfurizing agent being passed through, carries out desulphurization reaction through heat exchanger by flue gas cool-down to 50 DEG C~100 DEG C；S5 in the denitrfying agent for being passed through flue gas, carries out denitration reaction；S6 carries out ultraviolet light irradiation and electron beam irradiation simultaneously to first time desulphurization denitration flue gas, obtains second of desulphurization denitration flue gas；S7, water spray processing；S8 discharges the coke oven flue gas after denitration through air-introduced machine.The present invention is high by the method removal efficiency of desulphurization denitration twice, can be by the SO in flue gas2And NOxEqual pollutant removals, reduce the pollution to air, the injury to the mankind are reduced, so that the mankind are more healthy.
Description
Technical field
The present invention relates to coke oven flue gas processing technology field more particularly to a kind of methods of flue gas desulfurization and denitrification.
Background technique
Currently, the SO that coal as main energy sources, discharges in combustion process2And NOxThe equal total amount of pollutant are very big, can make
At serious atmosphere pollution, human health is endangered, with the rapid development of our country's economy, the increase of industrial pollution source and corresponding
Legislations of environmental protection is increasingly stringenter, while having pushed the progress of environmental improvement science and technology, is produced large quantities of environomental pollution sources and is controlled
Reason technology, wherein the technology in relation to flue gas scrubbing CO_2, nitrogen oxides has developed a variety of techniques.
Existing flue gas desulfurization and denitration technique has the following problems: removal efficiency is low, cost of investment is high, for this purpose, we mention
A kind of method of flue gas desulfurization and denitrification out.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of flue gas desulfurization and denitrification proposed
Method.
In order to achieve the above objectives, the technical scheme adopted by the invention is as follows: a kind of method of flue gas desulfurization and denitrification, preparation
Raw material and its removal methods the following steps are included:
Sorting: S1 selects distilled water, boiling is boiled；
S2 is selected: selecting FeCl3Solution；
S3, FeCl3Solution instills in boiling water, and continues to boil to bronzing liquid is generated, and desulfurizing agent can be obtained；
S4 in the desulfurizing agent being passed through, carries out desulphurization reaction through heat exchanger by flue gas cool-down to 50 DEG C~100 DEG C；
S5 in the denitrfying agent for being passed through flue gas, carries out denitration reaction；
S6 carries out ultraviolet light irradiation and electron beam irradiation simultaneously to first time desulphurization denitration flue gas, it is de- to obtain second of desulfurization
Smoke of gunpowder gas；
S7, water spray processing；
S8 discharges the coke oven flue gas after denitration through air-introduced machine.
Optimally, in the desulfurizing agent that the flue gas is passed through, desulphurization reaction is carried out, specific desulphurization reaction is as follows,
2Fe(OH)3·XH2O+3H2S→Fe2S3·XH2O+6H2O；Fe2O3·XH2O+3H2S→Fe2S3·XH2O+3H2O, removing 80~
85%.
Optimally, the main component of the denitrfying agent is CaCO3, CaCO3Wet Flue Gas Desulfurization Technique as desulfurizing agent, which combines, to be made
With the reaction product of desulfurization is but also as NO2Reducing agent, the denitrification rate of wet flue gas denitration agent, and can be simultaneously up to 95%
Secondary desulfuration, so that desulfuration efficiency is higher.
Optimally, the S6 ultraviolet light irradiation is two beam ultraviolet light relative exposures, and electron beam irradiation is two beam electrons beam phases
To irradiation.
Optimally, in the S7, water spray processing using atomizing spray, spray be mass concentration be 30% it is double
The aqueous solution of oxygen water.
Due to the above technical solutions, the present invention has the following advantages over the prior art:
For the present invention by the way that flue gas is cooled down by heat exchanger, heat exchanger is that the partial heat of hot fluid is passed to cold fluid
Equipment, also known as heat exchanger.Heat exchanger occupies importantly in chemical industry, petroleum, power, food and other many industrial productions
Position, heat exchanger can be used as heater, cooler, condenser, evaporator and reboiler etc. in Chemical Manufacture, be widely used,
Then in the desulfurizing agent flue gas after heat exchange being passed through, so that flue gas comes into full contact with desulfurizing agent, desulphurization reaction is carried out,
Removal efficiency is high, Sulfur capacity is big, price is low, can at normal temperature air regenesis the features such as and receive praises from customers, desulfuration efficiency is high, in conjunction with
Ultraviolet light irradiation and electron beam irradiation, the ultraviolet luminous energy of this wavelength promote the SO in flue gas2It absorbs and reacts, then by drawing
Blower removes, and electron beam irradiation, except nitre has good effect, promotes the oxygenolysis of sulfur dioxide and nitrogen oxides to sulphur removal,
Realize desulphurization denitration simultaneously, using desulphurization denitration method twice, desulfurization off sulfide effect is very good, in this way can be by the SO in flue gas2
And NOxEqual pollutant removals, reduce the pollution to air, the injury to the mankind are reduced, so that the mankind are more healthy.
Specific embodiment
It is described in detail below in conjunction with to the preferred embodiment of the invention.
Embodiment one
A kind of method of flue gas desulfurization and denitrification proposed by the present invention, prepares raw material and its removal methods include following step
It is rapid:
Sorting: S1 selects distilled water, boiling is boiled；
S2 is selected: selecting FeCl3Solution；
S3, FeCl3Solution instills in boiling water, and continues to boil to bronzing liquid is generated, and desulfurizing agent can be obtained；
S4 in the desulfurizing agent being passed through, carries out desulphurization reaction through heat exchanger by flue gas cool-down to 50 DEG C；
S5 in the denitrfying agent for being passed through flue gas, carries out denitration reaction；
S6 carries out ultraviolet light irradiation and electron beam irradiation simultaneously to first time desulphurization denitration flue gas, it is de- to obtain second of desulfurization
Smoke of gunpowder gas；
S7, water spray processing；
S8 discharges the coke oven flue gas after denitration through air-introduced machine.
In the desulfurizing agent that flue gas is passed through, desulphurization reaction is carried out, specific desulphurization reaction is as follows, 2Fe (OH)3·
XH2O+3H2S→Fe2S3·XH2O+6H2O (desulfurization)；Fe2O3·XH2O+3H2S→Fe2S3·XH2O+3H2O (desulfurization), desulfurization
Effect is good, Sulfur capacity is big, price is low, can at normal temperature air regenesis the features such as and receive praises from customers, desulfuration efficiency is high.
The denitrfying agent is CaCO3(lime stone), CaCO3(lime stone) is combined as the Wet Flue Gas Desulfurization Technique of desulfurizing agent to be made
With the reaction product of desulfurization is but also as NO2Reducing agent, and can simultaneously secondary desulfuration so that desulfuration efficiency is higher, in flue gas
Contained flue dust, sulfur dioxide, nitrogen oxides (NOx) etc. harmful substances be to cause the environment such as atmosphere pollution, acid rain, greenhouse effects
How the main contributor of problem effectively removes the SO in flue gas2And NOxCause the attention of countries in the world researcher.In the world today
Apply widest desulfurization technology is flue gas desulfurization technique (FGD), wherein wet FGD has very high desulfuration efficiency, but difficult
To be used to denitration.This is because NO in flue gasxMain component be NO, account for about 90% of total amount or more, it is a kind of colourless, nothing
No matter smelly, inactive gas is all hardly absorbed in water or in lye other than generating complex compound.
The S6 ultraviolet light irradiation is two beam ultraviolet light relative exposures, and electron beam irradiation is two beam electrons beam relative irradiations,
Ultraviolet wavelength is 220nm, and power is 20~30W, and the temperature of electron beam irradiation reaction is 120 DEG C, the ultraviolet light of this wavelength
It can promote the SO in flue gas2It absorbs and reacts, then removed by air-introduced machine, electron beam irradiation is good except nitre has to sulphur removal
Effect, removal efficiency is high, while electron beam irradiation sterilization process principle is to generate electron beam using electron accelerator, by ionizing spoke
It penetrates and acts on by organism (microorganism etc.) on irradiated material, is made by expendable damage and destruction, reach desinsection, anti-
Mould, insect prevention, disinfection, sterilize, extend the shelf life, is fresh-keeping, sprout inhibition the effects of.This method is more quick, environmental protection, safety, nothing
It remains, is pollution-free；The sterilization method of cold working and the environmentally protective sterilization method of international endorsement.
In the S7, using atomizing spray, spray is hydrogen peroxide that mass concentration is 30% for water spray processing
Aqueous solution, hydrogen peroxide are commonly called as hydrogen peroxide.Appearance is colourless transparent liquid, is a kind of strong oxidizer, and aqueous solution is suitable for doctor
With wound disinfection and environment disinfected and food sterilization；Chemical industry is used as production sodium perborate, SODIUM PERCARBONATE, Peracetic acid, Asia
The raw material of sodium chlorate, thiourea peroxide etc., the oxidant of tartaric acid, vitamin etc..Medical industry is used as fungicide, disinfectant,
And the oxidant of production thiram insecticide and 401 antibacterial agents.Printing and dyeing industry is used as the bleaching agent of cotton fabric, reducing dye dye
Colour former after color.De-iron and other heavy metals are removed when for producing metallic salt or other compounds.It is also used for electroplate liquid, it can
Inorganic impurity is removed, plating quality is improved.It is also used to the bleaching of wool, raw silk, ivory, paper pulp, fat etc..The peroxide of high concentration
Changing hydrogen can be used as rocket-powered fuel, and sterilizing thoroughly, can kill the helminth and pathogenic bacteria for colonizing in product, prevent product thin
Bacterium is exceeded, improves the hygienic quality of product；Nutritive loss is few, and being processed food, internal temperature varies less in process,
The loss of flavour of food products is not will cause；Guarantee food safety, machined article can first pass through packaging, canning sealing is irradiated again
Sterilization treatment avoids secondary pollution.
Embodiment two
A kind of method of flue gas desulfurization and denitrification proposed by the present invention, prepares raw material and its removal methods include following step
It is rapid:
Sorting: S1 selects distilled water, boiling is boiled；
S2 is selected: selecting FeCl3Solution；
S3, FeCl3Solution instills in boiling water, and continues to boil to bronzing liquid is generated, and desulfurizing agent can be obtained；
S4 in the desulfurizing agent being passed through, carries out desulphurization reaction through heat exchanger by flue gas cool-down to 100 DEG C；
S5 in the denitrfying agent for being passed through flue gas, carries out denitration reaction；
S6 carries out ultraviolet light irradiation and electron beam irradiation simultaneously to first time desulphurization denitration flue gas, it is de- to obtain second of desulfurization
Smoke of gunpowder gas；
S7, water spray processing；
S8 discharges the coke oven flue gas after denitration through air-introduced machine.
In the desulfurizing agent that flue gas is passed through, desulphurization reaction is carried out, specific desulphurization reaction is as follows, 2Fe (OH)3·
XH2O+3H2S→Fe2S3·XH2O+6H2O (desulfurization)；Fe2O3·XH2O+3H2S→Fe2S3·XH2O+3H2O (desulfurization), desulfurization
Effect is good, Sulfur capacity is big, price is low, can at normal temperature air regenesis the features such as and receive praises from customers, desulfuration efficiency is high.
Denitrfying agent is CaCO3(lime stone), CaCO3(lime stone) is used in combination as the Wet Flue Gas Desulfurization Technique of desulfurizing agent, takes off
The reaction product of sulphur is but also as NO2Reducing agent, and can simultaneously secondary desulfuration contain in flue gas so that desulfuration efficiency is higher
Flue dust, sulfur dioxide, nitrogen oxides (NOx) etc. harmful substances cause the environmental problems such as atmosphere pollution, acid rain, greenhouse effects
How main contributor effectively removes the SO in flue gas2And NOxCause the attention of countries in the world researcher.It is applied in the world today
Widest desulfurization technology is flue gas desulfurization technique (FGD), and wherein wet FGD has very high desulfuration efficiency, but be difficult to for
Denitration.This is because NO in flue gasxMain component be NO, account for about 90% of total amount or more, it is a kind of colourless, odorless, no
No matter active gas is all hardly absorbed in water or in lye other than generating complex compound.
The irradiation of S6 ultraviolet light is two beam ultraviolet light relative exposures, and electron beam irradiation is two beam electrons beam relative irradiations, ultraviolet
Line wavelength is 220nm, and power is 45~50W, and the temperature of electron beam irradiation reaction is 180 DEG C, and the ultraviolet luminous energy of this wavelength promotees
Into the SO in flue gas2It absorbs and reacts, then removed by air-introduced machine, electron beam irradiation is to sulphur removal except nitre has good work
With removal efficiency is high, while electron beam irradiation sterilization process principle is to generate electron beam using electron accelerator, passes through ionising radiation
Act on by organism (microorganism etc.) on irradiated material, is made by expendable damage and destruction, reach desinsection, it is mould proof,
Insect prevention, disinfection, sterilize, extend the shelf life, is fresh-keeping, sprout inhibition the effects of.This method is more quick, environmental protection, safety, without residual
It stays, is pollution-free；The sterilization method of cold working and the environmentally protective sterilization method of international endorsement.
In S7, using atomizing spray, spray is the water-soluble of hydrogen peroxide that mass concentration is 30% for water spray processing
Liquid, hydrogen peroxide are commonly called as hydrogen peroxide.Appearance is colourless transparent liquid, is a kind of strong oxidizer, and aqueous solution is suitable for medical wound
Mouth disinfection and environment disinfected and food sterilization；Chemical industry is used as production sodium perborate, SODIUM PERCARBONATE, Peracetic acid, chlorous acid
The raw material of sodium, thiourea peroxide etc., the oxidant of tartaric acid, vitamin etc..Medical industry is used as fungicide, disinfectant, and
Produce the oxidant of thiram insecticide and 401 antibacterial agents.Printing and dyeing industry is used as the bleaching agent of cotton fabric, after reducing dye dyeing
Colour former.De-iron and other heavy metals are removed when for producing metallic salt or other compounds.It is also used for electroplate liquid, can be removed
Inorganic impurity improves plating quality.It is also used to the bleaching of wool, raw silk, ivory, paper pulp, fat etc..The hydrogen peroxide of high concentration
It can be used as rocket-powered fuel, sterilizing thoroughly, can kill the helminth and pathogenic bacteria for colonizing in product, prevent product bacterium super
Mark, improves the hygienic quality of product；Nutritive loss is few, and being processed food, internal temperature varies less in process, will not
Cause the loss of flavour of food products；Guarantee food safety, machined article can first pass through packaging, canning sealing and carry out irradiation sterilization again
Processing, avoids secondary pollution.
For the present invention by the way that flue gas is cooled down by heat exchanger, heat exchanger is that the partial heat of hot fluid is passed to cold fluid
Equipment, also known as heat exchanger.Heat exchanger occupies importantly in chemical industry, petroleum, power, food and other many industrial productions
Position, heat exchanger can be used as heater, cooler, condenser, evaporator and reboiler etc. in Chemical Manufacture, be widely used,
Then in the desulfurizing agent flue gas after heat exchange being passed through, so that flue gas comes into full contact with desulfurizing agent, desulphurization reaction is carried out,
Removal efficiency is up to 80~85%, Sulfur capacity is big, price is low, can at normal temperature air regenesis the features such as and receive praises from customers, desulfurization
High-efficient, in conjunction with ultraviolet light irradiation and electron beam irradiation, the ultraviolet luminous energy of this wavelength promotes the SO in flue gas2It absorbs and anti-
It answers, is then removed by air-introduced machine, electron beam irradiation, except nitre has good effect, promotes sulfur dioxide and nitrogen oxidation to sulphur removal
The oxygenolysis of object, while realizing desulphurization denitration, using desulphurization denitration method twice, the removal efficiency of nitrogen oxides and sulfur dioxide
99.5% or more, desulfurization off sulfide effect is very good, in this way can be by the SO in flue gas2And NOxEqual pollutant removals, are reduced
Pollution to air reduces the injury to the mankind, so that the mankind are more healthy.
Embodiment three
A kind of method of flue gas desulfurization and denitrification proposed by the present invention, prepares raw material and its removal methods include following step
It is rapid:
Sorting: S1 selects distilled water, boiling is boiled；
S2 is selected: selecting FeCl3Solution；
S3, FeCl3Solution instills in boiling water, and continues to boil to bronzing liquid is generated, and desulfurizing agent can be obtained；
S4 in the desulfurizing agent being passed through, carries out desulphurization reaction through heat exchanger by flue gas cool-down to 90 DEG C；
S5 in the denitrfying agent for being passed through flue gas, carries out denitration reaction；
S6 carries out ultraviolet light irradiation and electron beam irradiation simultaneously to first time desulphurization denitration flue gas, it is de- to obtain second of desulfurization
Smoke of gunpowder gas；
S7, water spray processing；
S8 discharges the coke oven flue gas after denitration through air-introduced machine.
In the desulfurizing agent that flue gas is passed through, desulphurization reaction is carried out, specific desulphurization reaction is as follows, 2Fe (OH)3·
XH2O+3H2S→Fe2S3·XH2O+6H2O (desulfurization)；Fe2O3·XH2O+3H2S→Fe2S3·XH2O+3H2O (desulfurization), desulfurization
Effect is good, Sulfur capacity is big, price is low, can at normal temperature air regenesis the features such as and receive praises from customers, desulfuration efficiency is high.
Denitrfying agent is CaCO3(lime stone), CaCO3(lime stone) is used in combination as the Wet Flue Gas Desulfurization Technique of desulfurizing agent, takes off
The reaction product of sulphur is but also as NO2Reducing agent, and can simultaneously secondary desulfuration contain in flue gas so that desulfuration efficiency is higher
Flue dust, sulfur dioxide, nitrogen oxides (NOx) etc. harmful substances cause the environmental problems such as atmosphere pollution, acid rain, greenhouse effects
How main contributor effectively removes the SO in flue gas2And NOxCause the attention of countries in the world researcher.It is applied in the world today
Widest desulfurization technology is flue gas desulfurization technique (FGD), and wherein wet FGD has very high desulfuration efficiency, but be difficult to for
Denitration.This is because NO in flue gasxMain component be NO, account for about 90% of total amount or more, it is a kind of colourless, odorless, no
No matter active gas is all hardly absorbed in water or in lye other than generating complex compound.
The irradiation of S6 ultraviolet light is two beam ultraviolet light relative exposures, and electron beam irradiation is two beam electrons beam relative irradiations, ultraviolet
Line wavelength is 220nm, and power is 35~40W, and the temperature of electron beam irradiation reaction is 150 DEG C, and the ultraviolet luminous energy of this wavelength promotees
Into the SO in flue gas2It absorbs and reacts, then removed by air-introduced machine, electron beam irradiation is to sulphur removal except nitre has good work
With removal efficiency is high, while electron beam irradiation sterilization process principle is to generate electron beam using electron accelerator, passes through ionising radiation
Act on by organism (microorganism etc.) on irradiated material, is made by expendable damage and destruction, reach desinsection, it is mould proof,
Insect prevention, disinfection, sterilize, extend the shelf life, is fresh-keeping, sprout inhibition the effects of.This method is more quick, environmental protection, safety, without residual
It stays, is pollution-free；The sterilization method of cold working and the environmentally protective sterilization method of international endorsement.
In S7, using atomizing spray, spray is the water-soluble of hydrogen peroxide that mass concentration is 30% for water spray processing
Liquid, hydrogen peroxide are commonly called as hydrogen peroxide.Appearance is colourless transparent liquid, is a kind of strong oxidizer, and aqueous solution is suitable for medical wound
Mouth disinfection and environment disinfected and food sterilization；Chemical industry is used as production sodium perborate, SODIUM PERCARBONATE, Peracetic acid, chlorous acid
The raw material of sodium, thiourea peroxide etc., the oxidant of tartaric acid, vitamin etc..Medical industry is used as fungicide, disinfectant, and
Produce the oxidant of thiram insecticide and 401 antibacterial agents.Printing and dyeing industry is used as the bleaching agent of cotton fabric, after reducing dye dyeing
Colour former.De-iron and other heavy metals are removed when for producing metallic salt or other compounds.It is also used for electroplate liquid, can be removed
Inorganic impurity improves plating quality.It is also used to the bleaching of wool, raw silk, ivory, paper pulp, fat etc..The hydrogen peroxide of high concentration
It can be used as rocket-powered fuel, sterilizing thoroughly, can kill the helminth and pathogenic bacteria for colonizing in product, prevent product bacterium super
Mark, improves the hygienic quality of product；Nutritive loss is few, and being processed food, internal temperature varies less in process, will not
Cause the loss of flavour of food products；Guarantee food safety, machined article can first pass through packaging, canning sealing and carry out irradiation sterilization again
Processing, avoids secondary pollution.
Comparative example one
This example provides a kind of method of coke oven flue gas desulphurization denitration, it refers to the middle promulgated by the State Council of Publication No. CN106823725A
Bright patent, specifically: 260 DEG C or so of coke oven flue gas being drawn, coke oven flue gas temperature is reduced to 150 DEG C through heat exchanger, warp
After crossing processing, NOxRemoval efficiency be 89%, SO2Removal efficiency is 98%, dust content 14.9mg/m3。
Comparative example two
This example provides a kind of method of coke oven flue gas desulphurization denitration, it with it is almost the same in embodiment three, unlike:
S4 and S5 step is not carried out.
Comparative example three
This example provides a kind of method of coke oven flue gas desulphurization denitration, it with it is almost the same in embodiment three, unlike:
S6 step is not carried out.
To embodiment one to embodiment three, comparative example one to comparative example three, treated that flue gas detects, testing result
Shown in table 1.
1 embodiment one of table is to embodiment three, comparative example one to comparative example three treated flue gas inspection table
| Group | Desulphurizing ratio (%) | Except nitre rate (%) | Dust content (mg/m3) |
| Embodiment one | 98.5 | 95.5 | 10.2 |
| Embodiment two | 98.8 | 96.8 | 10.3 |
| Embodiment three | 99.2 | 98.5 | 10.1 |
| Comparative example one | 98.0 | 89.0 | 14.9 |
| Comparative example two | - | - | 12.5 |
| Comparative example three | 97.0 | 91.3 | 10.4 |
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of method of flue gas desulfurization and denitrification, which is characterized in that its prepare raw material and its removal methods the following steps are included:
Sorting: S1 selects distilled water, boiling is boiled；
S2 is selected: selecting FeCl3Solution；
S3, FeCl3Solution instills in boiling water, and continues to boil to bronzing liquid is generated, and desulfurizing agent can be obtained；
S4 in the desulfurizing agent being passed through, carries out desulphurization reaction through heat exchanger by flue gas cool-down to 50 DEG C~100 DEG C；
S5 in the denitrfying agent for being passed through flue gas, carries out denitration reaction；
S6 carries out ultraviolet light irradiation and electron beam irradiation simultaneously to first time desulphurization denitration flue gas, obtains second of desulphurization denitration cigarette
Gas；
S7, water spray processing；
S8 discharges the coke oven flue gas after denitration through air-introduced machine.
2. a kind of method of flue gas desulfurization and denitrification according to claim 1, which is characterized in that the flue gas was passed through
In desulfurizing agent, desulphurization reaction is carried out, specific desulphurization reaction is as follows, 2Fe (OH)3·XH2O+3H2S→Fe2S3·XH2O+
6H2O；Fe2O3·XH2O+3H2S→Fe2S3·XH2O+3H2O, removing 80~85%.
3. a kind of method of flue gas desulfurization and denitrification according to claim 1, which is characterized in that the denitrfying agent it is main at
It is divided into CaCO3, CaCO3Wet Flue Gas Desulfurization Technique as desulfurizing agent is used in combination, and the reaction product of desulfurization is but also as NO2Also
Former agent, the denitrification rate of wet flue gas denitration agent up to 95%, and can simultaneously secondary desulfuration so that desulfuration efficiency is higher.
4. a kind of method of flue gas desulfurization and denitrification according to claim 1, which is characterized in that the S6 ultraviolet light, which irradiates, is
Two beam ultraviolet light relative exposures, electron beam irradiation are two beam electrons beam relative irradiations.
5. a kind of method of flue gas desulfurization and denitrification according to claim 1, which is characterized in that in the S7, at water spray
Reason using atomizing spray, spray be the hydrogen peroxide that mass concentration is 30% aqueous solution.
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