CN109012123A - A kind of flue gas purifying method - Google Patents
A kind of flue gas purifying method Download PDFInfo
- Publication number
- CN109012123A CN109012123A CN201811119243.1A CN201811119243A CN109012123A CN 109012123 A CN109012123 A CN 109012123A CN 201811119243 A CN201811119243 A CN 201811119243A CN 109012123 A CN109012123 A CN 109012123A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- reaction tower
- gas purifying
- purifying method
- deduster
- 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
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
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/68—Halogens or halogen compounds
-
- 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
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of flue gas purifying method, purification method includes the following steps: to react Step 1: flue gas is imported reaction tower with lime white in a reverse direction；Step 2: treated flue gas through gas pipeline is oriented to deduster in reaction tower, and absorbent is injected in gas pipeline；It is oriented in atmosphere Step 3: deduster treated flue gas passes through chimney.Purification method of the invention is relatively easy, investment is low, operating cost is not high；It is reliable for operation, fouling and blocking will not be generated；Final product is easily handled；The advantages that not high for the corrosivity of equipment.
Description
Technical field
The invention belongs to garbage incinerating tail gas processing technology fields, and in particular to a kind of flue gas purifying method.
Background technique
There is the method for many desulfurization at present, most common is exactly two kinds of dry and wet.By to domestic and international desulfurization technology
And domestic electrical industry introduces the analysis and research of sulfur removal technology pilot factory situation condition, sulfur method can generally be divided into burning at present
3 classes such as desulfurization after desulfurization and burning in preceding desulfurization, burning.Desulfurization can be divided into following five kinds of methods after wherein burning: with CaCO3
Calcium method based on (lime stone), the magnesium processes based on MgO, with Na2SO3Based on sodium method, with NH3Based on ammonia process,
Organic alkaline process based on organic base.The commercial technologies generally used in the world are calcium methods, and proportion is 90% or more.
Desulfurization technology can be divided into wet process, dry method and half-dried (half again by the dry and wet state of absorbent and desulfurization product in sweetening process
It is wet) method.
In the flue gas generated after consumer waste incineration pollutant can be divided into particulate matter (dust), sour gas (HCL, HF,
SOX, NOX), heavy metal (HG, PB, CR etc.) and organic hypertoxicity pollutant (dioxin, furans etc.) four major class.Rubbish in order to prevent
Secondary pollution is generated to environment in rubbish burning process, it is necessary to adopt rigid measures, burn using flue gas purification system control rubbish
Burn the discharge of harmful substances from flue gases.
Summary of the invention
Present invention seek to address that the technical problems existing in the prior art.For this purpose, the present invention provides a kind of gas cleaning side
Method, it is therefore an objective to remove the harmful substance in flue gas.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
A kind of flue gas purifying method, includes the following steps:
It is reacted Step 1: flue gas is imported reaction tower with lime white in a reverse direction；
Step 2: treated flue gas through gas pipeline is oriented to deduster in reaction tower, and injects and inhale in gas pipeline
Receive agent；
It is oriented in atmosphere Step 3: deduster treated flue gas passes through chimney.
Lime white is sprayed into reaction tower by the rotary atomizer at the top of reaction tower in the step 1.
The revolving speed of the rotary atomizer is 15000-20000r/min, and the partial size of droplet is less than 100 μm after atomization.
Solid in the step 1 in reaction tower is discharged from bottom discharge outlet, is conveyed later to ash cellar.
Absorbent described in step 2 is active carbon.
Deduster described in step 2 is sack cleaner.
Solid in the step 2 in deduster is discharged from bottom discharge outlet, is conveyed later to ash cellar.
The method also includes being monitored by flue gas of the measuring instrument to smoke stack emission.
The step of the method also includes the exit region injection reducing agents to incinerator to reduce nitrogen oxides in effluent.
A kind of flue gas purification system, including reaction tower, the top of the reaction tower are equipped with the rotary-atomizing of atomization lime white
Device, the side wall of reaction tower are equipped with gas inlet, and the system also includes deduster, adsorbent syringe, chimneys and for that will remove
Treated in dirt device, and gas is oriented to the blower of chimney, and reaction tower is connect by gas pipeline with deduster, the adsorbent note
Emitter is set on the gas pipeline between reaction tower and deduster.
The system also includes the measuring instruments being monitored to the flue gas of smoke stack emission.
The system also includes the ash cellars for the solid for collecting reaction tower and deduster discharge.
Spray dryer flue gas desulfurization chemical process is as follows in the present invention:
CaO+H2O→Ca(OH)2
SO2+H2O→H2SO3
2HCl+Ca(OH)2→CaCl2+2H2O
2HF+Ca(OH)2→CaF2+2H2O
Ca(OH)2+H2SO3→CaSO3+2H2O
CaSO3(liquid)→CaSO3(solid)
CaSO3(liquid)+1/2O2→CaSO4
Beneficial effects of the present invention: purification method of the invention is relatively easy, investment is low, operating cost is not high；Operation can
It leans on, fouling and blocking will not be generated；Final product is easily handled；The advantages that not high for the corrosivity of equipment, is suitable for medium and small
Type power plant and burning power plant.System work process cleaning, no waste water generate；Product is solid-state, is easily processed；Process
Simply, equipment is reliable, easy to run and safeguard.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively:
Fig. 1 is purification system structural schematic diagram of the invention.
In the figure, it is marked as
1, incinerator, 2, half dry type reaction tower, 3, lime white preparing device, 4, rotary atomizer, 5, sack cleaner, 6, work
Property charcoal syringe, 7, blower, 8, chimney, 9, ash cellar, 10, measuring instrument.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to design of the invention, technical solution
Solution, and facilitate its implementation.
As shown in Figure 1, a kind of flue gas purification system, including incinerator 1 and reaction tower 2, the side wall of reaction tower are equipped with flue gas
Import, the gas that incinerator generates after burning import reaction tower, and the top of reaction tower 2 is equipped with the rotary atomizer of atomization lime white
4, atomization lime white is (main through curing the white lime for becoming to have preferable respond by quick lime by lime white preparation system
Ingredient is Ca (OH)2) slurries, which further includes deduster, adsorbent syringe, chimney 8 and for by dedusting
Treated in device, and gas is oriented to the blower 7 of chimney, and reaction tower 2 is connect by gas pipeline with deduster, adsorbent syringe
On gas pipeline between reaction tower 2 and deduster.Reaction tower preferably uses half dry type reaction tower, and deduster preferably uses
Sack cleaner 5, adsorbent syringe preferably use active carbon syringe 6, and the gas of incinerator discharge enters reaction tower progress
Cooling is simultaneously contacted with lime white droplet, and fraction coarse granule flue dust, reaction product (solid-state) and the lime not reacted completely exist
The bottom of reaction tower removes, and major part enters sack cleaner with flue gas and is captured down.Reaction tower and sack cleaner it
Between spray into activated carbon absorbent, microcellular structure ensures the absorption of dioxin and mercury vapour.
For the ease of collect reaction after solid, above system further include collect reaction tower 2 and deduster discharge consolidate
The ash cellar 9 of state object.Solid in reaction tower includes solid-state reaction product and the lime that does not react completely.
For the ease of the flue gas discharged in monitoring chimney, above system further includes being monitored to the flue gas of smoke stack emission
Measuring instrument 10.
It is as follows using method of the above system to gas cleaning:
It is reacted Step 1: flue gas is imported reaction tower with lime white in a reverse direction；
Step 2: treated flue gas through gas pipeline is oriented to deduster in reaction tower, and injects and inhale in gas pipeline
Receive agent；
It is oriented in atmosphere Step 3: deduster treated flue gas passes through chimney.
Wherein, the solid in reaction tower (reaction product and the lime not reacted completely) is discharged from bottom discharge outlet,
It is conveyed later to ash cellar.Solid in deduster is discharged from bottom discharge outlet, is conveyed later to ash cellar.
Specifically, flue gas rotates into reaction tower, white lime slurries pass through the high speed rotation atomization at the top of absorption tower
Device is injected into uniform droplet to be up to the revolving speed of 15000-20000r/min, and mist particle diameter is smaller than 100 μm.These atomizations
Lime white and flue gas are reacted with opposite direction of rotation mixing, generate solid product.Since lime white particle has after atomization
Very big specific surface area will occur strong heat exchange and chemical reaction, promptly steam most of moisture with smoke contacts
Hair forms the few solid lime-ash of water content.Effective control to evaporation process avoids forming deposition in spray drying tower being ten
It is point important, in operation, the concentration of lime white and the amount of penetrating are controlled, when the tail gas finally discharged does not meet discharge standard, adjusted
The straying quatity and concentration of arthrolith mortar, make final emission reach standard, and the deposit in tower can pass through bottom discharge outlet
Discharge.The dioxin-like chemical that rubbish generates during burning has stronger toxicity and carcinogenicity to human body.Two bad habit English
Substance has the characteristics that start to decompose at 800 DEG C of environment temperature or more, therefore its production quantity can be by reasonably organizing to burn
Process is controlled, i.e., the ignition temperature in incinerator is controlled in burning process at 800 DEG C or more.Burn the flue gas of outlet of still
Rated temperature is 200 DEG C, carries out cooling into reaction tower and contacts with lime white droplet, and the two carries out reaction removal sour gas
(HCL, SOX, HF) and heavy metal etc..Fraction coarse granule flue dust, reaction product (solid-state) and the lime not reacted completely exist
The bottom of reaction tower is removed down, and major part enters sack cleaner with flue gas and is captured down.Reaction tower and sack cleaner it
Between spray into activated carbon absorbent, microcellular structure ensures the absorption of dioxin and mercury vapour.If absorbent granules are not complete
It is dry, then it may continue to the chemical reaction that sulfur dioxide absorption occurs in the flue and deduster after absorption tower.
The present invention is exemplarily described in conjunction with attached drawing above.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out；Or not
It is improved, above-mentioned conception and technical scheme of the invention are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (9)
1. a kind of flue gas purifying method, which comprises the steps of:
It is reacted Step 1: flue gas is imported reaction tower with lime white in a reverse direction；
Step 2: treated flue gas through gas pipeline is oriented to deduster in reaction tower, and absorbent is injected in gas pipeline；
It is oriented in atmosphere Step 3: deduster treated flue gas passes through chimney.
2. flue gas purifying method according to claim 1, which is characterized in that lime white passes through reaction tower top in the step 1
The rotary atomizer in portion sprays into reaction tower.
3. flue gas purifying method according to claim 2, which is characterized in that the revolving speed of the rotary atomizer is 15000-
20000r/min, the partial size of droplet is less than 100 μm after atomization.
4. flue gas purifying method according to claim 1, which is characterized in that solid in the step 1 in reaction tower from
Bottom discharge outlet discharge, conveys later to ash cellar.
5. flue gas purifying method according to claim 1, which is characterized in that absorbent described in step 2 is active carbon.
6. flue gas purifying method according to claim 1, which is characterized in that deduster described in step 2 is bag-type dusting
Device.
7. flue gas purifying method according to claim 1, which is characterized in that solid in the step 2 in deduster from
Bottom discharge outlet discharge, conveys later to ash cellar.
8. flue gas purifying method according to claim 1, which is characterized in that the method also includes passing through measuring instrument to cigarette
The flue gas of chimney discharge is monitored.
9. flue gas purifying method according to claim 1, which is characterized in that the method also includes the outlet areas to incinerator
Spray the step of reducing agent is to reduce nitrogen oxides in effluent in domain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119243.1A CN109012123A (en) | 2018-09-25 | 2018-09-25 | A kind of flue gas purifying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119243.1A CN109012123A (en) | 2018-09-25 | 2018-09-25 | A kind of flue gas purifying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109012123A true CN109012123A (en) | 2018-12-18 |
Family
ID=64618339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811119243.1A Pending CN109012123A (en) | 2018-09-25 | 2018-09-25 | A kind of flue gas purifying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109012123A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026058A (en) * | 2019-04-19 | 2019-07-19 | 漳州环境再生能源有限公司 | A kind of smoke reaction tower |
| CN111434372A (en) * | 2019-01-15 | 2020-07-21 | 沈阳铝镁设计研究院有限公司 | Method and device for treating flue gas generated by roasting of prebaked anode |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203635061U (en) * | 2013-11-27 | 2014-06-11 | 万斌 | Tail gas purification device |
| CN206343076U (en) * | 2016-12-30 | 2017-07-21 | 安徽海螺川崎工程有限公司 | Dry method injection equipment is used in flue gas of refuse burning processing |
| CN107617317A (en) * | 2017-09-19 | 2018-01-23 | 北京首科兴业工程技术有限公司 | A kind of ultra-clean cleaning system of flue gas |
| JP2018065063A (en) * | 2016-10-17 | 2018-04-26 | 日立造船株式会社 | Fly ash treatment equipment and fly ash treatment method |
-
2018
- 2018-09-25 CN CN201811119243.1A patent/CN109012123A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203635061U (en) * | 2013-11-27 | 2014-06-11 | 万斌 | Tail gas purification device |
| JP2018065063A (en) * | 2016-10-17 | 2018-04-26 | 日立造船株式会社 | Fly ash treatment equipment and fly ash treatment method |
| CN206343076U (en) * | 2016-12-30 | 2017-07-21 | 安徽海螺川崎工程有限公司 | Dry method injection equipment is used in flue gas of refuse burning processing |
| CN107617317A (en) * | 2017-09-19 | 2018-01-23 | 北京首科兴业工程技术有限公司 | A kind of ultra-clean cleaning system of flue gas |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111434372A (en) * | 2019-01-15 | 2020-07-21 | 沈阳铝镁设计研究院有限公司 | Method and device for treating flue gas generated by roasting of prebaked anode |
| CN111434372B (en) * | 2019-01-15 | 2022-04-29 | 沈阳铝镁设计研究院有限公司 | Method and device for treating flue gas generated by roasting of prebaked anode |
| CN110026058A (en) * | 2019-04-19 | 2019-07-19 | 漳州环境再生能源有限公司 | A kind of smoke reaction tower |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102120130B (en) | Complete set of device and method for treating tail gas from sludge incineration through semidry method | |
| CN206652386U (en) | A kind of minimum discharge purifier of burning city domestic garbage flue gas | |
| AU2007258119B2 (en) | Integrated dry and wet flue gas cleaning process and system | |
| CN109569228A (en) | The exhaust system and technique of flue gas of garbage furnace | |
| CN101648099B (en) | Purifying treatment device and purifying treatment method for flue gas multicomponent pollutant generated by incinerating refuse | |
| CN207486806U (en) | Hazardous waste three-stage is burned and exhaust treatment system | |
| CN202289839U (en) | House refuse incineration smoke purifying system | |
| CN103185346B (en) | Combined purification system for waste incineration smoke and technology of combined purification system | |
| CN103432887B (en) | A kind of waste incinerated smoke purification system and technique | |
| CN105289248B (en) | Wet-type purification treatment method and device for flue gas of household garbage incineration power plant | |
| CN105080310A (en) | Waste incineration flue gas purification system and integral solution process | |
| CN101249378A (en) | Method for eliminating dioxins in flue gas | |
| US5965095A (en) | Flue gas humidification and alkaline sorbent injection for improving vapor phase selenium removal efficiency across wet flue gas desulfurization systems | |
| CN108043210A (en) | A kind of desulfurization of coke oven flue gas and dedusting denitrification integral system | |
| CN100363088C (en) | Method for removing hydrargyrum from coal burning boiler flue gas by ozone oxidation | |
| CN109603462A (en) | A kind of technique using plasma purification flue gas of garbage furnace | |
| KR20160116771A (en) | Exhaust gas treatment system for abatement of white plume | |
| EP1399695A1 (en) | Flue gas purification device for an incinerator | |
| CN201899980U (en) | Complete device for treating sludge incineration tail gas in semidry method | |
| CN203635060U (en) | Tail gas purification system in circulating treatment manner | |
| CN109012123A (en) | A kind of flue gas purifying method | |
| CN208809774U (en) | A kind of ultra-clean purification system of flue gas | |
| CN203635061U (en) | Tail gas purification device | |
| CN105536461A (en) | Domestic garbage incineration flue gas treatment process | |
| CN110841447A (en) | Wet-method-SCR combined purification method and system for waste incineration flue 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 |
Application publication date: 20181218 |
|
| RJ01 | Rejection of invention patent application after publication |