CN110180389A - Flue gas treating process and its device in waste alumina regenerative process - Google Patents
Flue gas treating process and its device in waste alumina regenerative process Download PDFInfo
- Publication number
- CN110180389A CN110180389A CN201910482247.4A CN201910482247A CN110180389A CN 110180389 A CN110180389 A CN 110180389A CN 201910482247 A CN201910482247 A CN 201910482247A CN 110180389 A CN110180389 A CN 110180389A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- waste
- regenerative process
- alumina
- heat boiler
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- 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
- B01D46/04—Cleaning filters
-
- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/06—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 adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
- B01D53/10—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 adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents
-
- 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
- B01D53/346—Controlling the process
-
- 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
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic 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
- B01D53/77—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
- B01D53/8625—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
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
Abstract
The present invention relates to the flue gas treating process and its device in a kind of waste alumina regenerative process, belong to technical field of waste gas treatment.Flue gas treating process in waste alumina regenerative process of the present invention, it is burned the following steps are included: the flue gas in waste alumina regenerative process is passed through dual firing chamber by (1), enters back into waste heat boiler and cool down, subsequently into chilling tower cooler, active carbon injection, dedusting；(2) flue gas after dedusting enters waste heat boiler and exchanges heat, subsequently into SCR denitration reaction device denitration；(3) flue gas after denitration enters alkali adsorption tower processing, discharge after flue gas is up to standard.Flue gas treating process in waste alumina regenerative process of the present invention, at low cost, the period is short, and low energy consumption, without secondary pollution, safety and environmental protection；The present invention provides a kind of flue gas processing devices of the simple science of design simultaneously.
Description
Technical field
The present invention relates to the flue gas treating process and its device in a kind of waste alumina regenerative process, belong to exhaust-gas treatment skill
Art field.
Background technique
Activated alumina is one of the principal item of catalyst carrier and adsorbent, and there is purity is high, raw material to be easy to get, add for it
The advantages that work is convenient, physico-chemical property is adjustable.With the development of industry, the dosage of countries in the world industrial catalyst increases sharply, mountain
East saves Hydrogen Peroxide Production amount at 100,000 tons or more, needs about 6,000,000 tons of activated alumina, in the industrial production, activated alumina year
It is used to adsorb these anthraquinone degradation products.
The organic matters such as anthraquinone, the pungent rouge of sulfuric acid three, aromatic hydrocarbons are mainly contained in activated alumina after use, there are also lye, water
Point and other micro substances.These substances block activating oxide internal gutter partly or entirely, and internal structure occurs huge
Big variation is formd than originally finer and close structure, and internal aperture disappears or becomes smaller, and activated alumina specific surface area is caused to drop
Low, but with the extension of use time, the activity of these aluminium oxide can gradually decrease, until not being able to satisfy production requirement and more
It changes.Replaced aluminium oxide is handled as a kind of Industrial Solid Waste, is not only resulted in waste of resources and is also caused greatly to environment
Pollution.
The flue gas generated in waste alumina regenerative process mainly contains sour gas (sulfur dioxide, oxynitrides, chlorination
Hydrogen), flue dust, volatile heavy metal, the substances such as dioxin, handled by existing flue gas treating process and device, still up to not
To the discharge standard of national requirements, it is also easy to cause secondary pollution during processing.
Summary of the invention
The object of the present invention is to provide the flue gas treating process in a kind of waste alumina regenerative process, at low cost, periods
Short, low energy consumption, without secondary pollution, safety and environmental protection；The present invention provides a kind of flue gas processing devices of the simple science of design simultaneously.
Flue gas treating process in waste alumina regenerative process of the present invention, comprising the following steps:
(1) flue gas in waste alumina regenerative process is passed through dual firing chamber to burn, enters back into waste heat boiler and cool down, so
Enter chilling tower cooler, active carbon injection, dedusting afterwards；
(2) flue gas after dedusting enters waste heat boiler and exchanges heat, subsequently into SCR denitration reaction device denitration；
(3) flue gas after denitration enters alkali adsorption tower processing, discharge after flue gas is up to standard.
Preferably, the flue gas treating process in the waste alumina regenerative process, specifically includes the following steps:
The flue gas generated in waste alumina regenerative process is passed through dual firing chamber, flue gas in dual firing chamber >=1100 DEG C of temperature
Lower stop 3-4s goes out the substances such as heavy metal in flue gas using the high temperature incineration of dual firing chamber, cools down subsequently into waste heat boiler, flue gas
After cooling to≤600 DEG C enter chilling tower, spray water into chilling tower, make flue-gas temperature be rapidly decreased within 1s 200 DEG C hereinafter,
Active carbon jetting device is arranged in chilling tower exiting flue gas pipeline, dirty for adsorbing dioxin and volatile heavy metal in flue gas etc.
Object is contaminated, subsequently into bag filter dedusting, the flue gas after dedusting enters waste heat boiler and high-temperature flue gas exchanges heat, and temperature is risen to
Enter SCR denitration reaction device from gas outlet after 220 DEG C or more, installs two layers of catalyst additional, while configured dilute urea solution is logical
It crosses spray ammonia grid and enters SCR denitration reaction device, the flue gas after denitration is sent into alkali adsorption tower and removes qualified discharge after acidic materials.
Flue gas processing device in the waste alumina regenerative process, including sequentially connected dual firing chamber, waste heat boiler,
Chilling tower and bag filter, bag filter are connected with waste heat boiler, waste heat boiler and SCR denitration reaction device and alkali adsorption tower
It is sequentially connected；Active carbon jetting device is set on the flue of chilling tower outlet；SCR denitration reaction device and spray ammonia grid phase
Even.
Compared with prior art, the invention has the following advantages:
The present invention is directed to the characteristics of flue gas in waste alumina regenerative process, and scientific and reasonable devises a set of integrated treatment
Technique and device utilize a whole set of cigarette of " chilling tower+active carbon injection+cleaner+flue gas reheat+SCR denitration+alkali adsorption tower "
Gas purification process and device, make flue gas emission be up to state standards, and do not have secondary pollution generation in treatment process.
Detailed description of the invention
Fig. 1 is the flue gas processing device in the waste alumina regenerative process；
In figure: 1, dual firing chamber；2, waste heat boiler；3, chilling tower；4, active carbon jetting device；5, bag filter；6, alkali
Absorption tower；7, SCR denitration reaction device；8, ammonia grid is sprayed.
Specific embodiment
Embodiment 1
As shown in Figure 1, the flue gas processing device in the waste alumina regenerative process, including sequentially connected dual firing chamber
1, waste heat boiler 2, chilling tower 3 and bag filter 5, bag filter 5 are connected with waste heat boiler 2, and waste heat boiler 2 and SCR are de-
Nitre reactor 7 and alkali adsorption tower 6 are sequentially connected；Active carbon jetting device 4 is set on the flue that chilling tower 3 exports；SCR is de-
Nitre reactor 7 is connected with spray ammonia grid 8.
Flue gas treating process in the waste alumina regenerative process, comprising the following steps:
(1) calcined flue gas (500 DEG C) enters dual firing chamber 1 from kiln tail, and flue gas stops 3s at 1150 DEG C, to decompose
Dioxin-like chemical easily generated, subsequently into waste heat boiler 2, after flue gas is down to 600 DEG C in waste heat boiler 2, into chilling tower
3, it sprays water into chilling tower 3, water mist directly carries out mass-and heat-transfer with flue gas and exchanges, and drops to flue-gas temperature rapidly in 0.7s
180 DEG C, the temperature section that dioxin synthesizes again can be avoided, to achieve the purpose that inhibit dioxin；
(2) flue gas after chilling enters active carbon jetting device 4, active powdered carbon is sprayed into device, to inhale as much as possible
It is attached not yet to decompose and the dioxin-like chemical that synthesizes again, through active carbon injection apparatus treated flue gas subsequently into bag-type dust
5 dedusting of device, bag filter 5 use line pulse deashing, guarantee efficiency of dust collection up to 99.5%；
(3) flue gas enters waste heat boiler 2 after dedusting and high-temperature flue gas exchanges heat, and flue-gas temperature is risen to 240 DEG C, which can
To prevent the Crystallization Plugging catalyst of the ammonium sulfate substance in SCR technique, then flue gas enters SCR denitration reaction device 7, using choosing
The catalytic-reduction denitrified method of selecting property, while configured dilute urea solution is entered into denitration SCR reactor by spray ammonia grid 8；Cigarette
Nitrogen oxides in gas is reduced into nitrogen and water by ammonia under the action of catalyst, while part dioxin can also be destroyed at this；
(4) in order to further remove the sour gas and harmful substance in flue gas, the flue gas after denitration is sent into alkali adsorption tower
6, in order to guarantee the washing effect of lye, automatic control system is set, liquid volume added is automatically adjusted according to the variation of pH value, makes to wash
Effect reaches most preferably, and 6 wet process depickling of alkali adsorption tower designs deacidification efficiency > 95%, and alkali adsorption tower 6 sets a washes circulation
Pond, lye internal circulating load are 100t/h, return the recycling of alkali adsorption tower 6 again after adjusting pH value, periodically exclude.
After the smoke emissioning concentration of series of process processing meets discharge standard of air pollutants, from 50m high
Smoke stack emission.
Embodiment 2
Device used is identical as in embodiment 1.
Flue gas treating process in the waste alumina regenerative process, comprising the following steps:
(1) calcined flue gas (500 DEG C) enters dual firing chamber 1 from kiln tail, and flue gas stops 4s at 1100 DEG C, to decompose
Dioxin-like chemical easily generated, subsequently into waste heat boiler 2, after flue gas is down to 550 DEG C in waste heat boiler 2, into chilling tower
3, it sprays water into chilling tower 3, water mist directly carries out mass-and heat-transfer with flue gas and exchanges, and drops to flue-gas temperature rapidly in 0.9s
160 DEG C, the temperature section that dioxin synthesizes again can be avoided, to achieve the purpose that inhibit dioxin；
(2) flue gas after chilling enters active carbon jetting device 4, active powdered carbon is sprayed into device, to inhale as much as possible
It is attached not yet to decompose and the dioxin-like chemical that synthesizes again, through active carbon injection apparatus treated flue gas subsequently into bag-type dust
5 dedusting of device, bag filter 5 use line pulse deashing, guarantee efficiency of dust collection up to 99.6%；
(3) flue gas enters waste heat boiler 2 after dedusting and high-temperature flue gas exchanges heat, and flue-gas temperature is risen to 230 DEG C, which can
To prevent the Crystallization Plugging catalyst of the ammonium sulfate substance in SCR technique, then flue gas enters SCR denitration reaction device 7, using choosing
The catalytic-reduction denitrified method of selecting property, while configured dilute urea solution is entered into denitration SCR reactor by spray ammonia grid 8；Cigarette
Nitrogen oxides in gas is reduced into nitrogen and water by ammonia under the action of catalyst, while part dioxin can also be destroyed at this；
(4) in order to further remove the sour gas and harmful substance in flue gas, the flue gas after denitration is sent into alkali adsorption tower
6, in order to guarantee the washing effect of lye, automatic control system is set, liquid volume added is automatically adjusted according to the variation of pH value, makes to wash
Effect reaches most preferably, and 6 wet process depickling of alkali adsorption tower designs deacidification efficiency > 96%, and alkali adsorption tower 6 sets a washes circulation
Pond, lye internal circulating load are 110t/h, return the recycling of alkali adsorption tower 6 again after adjusting pH value, periodically exclude.
After the smoke emissioning concentration of series of process processing meets discharge standard of air pollutants, from 50m high
Smoke stack emission.
Claims (6)
1. the flue gas treating process in a kind of waste alumina regenerative process, it is characterised in that the following steps are included:
Flue gas in waste alumina regenerative process is passed through dual firing chamber (1) and burned by ((1)), is entered back into waste heat boiler (2) and is dropped
Temperature, active carbon injection cooling subsequently into chilling tower (3), dedusting；
Flue gas after ((2)) dedusting enters waste heat boiler (2) and exchanges heat, subsequently into SCR denitration reaction device (7) denitration；
Flue gas after ((3)) denitration enters alkali adsorption tower (6) processing, discharge after flue gas is up to standard.
2. the flue gas treating process in waste alumina regenerative process according to claim 1, it is characterised in that: flue gas is two
Fire room (1) in >=1100 DEG C at a temperature of stop 3~4s.
3. the flue gas treating process in waste alumina regenerative process according to claim 1, it is characterised in that: flue gas enters
Waste heat boiler (2) is cooled to≤600 DEG C.
4. the flue gas treating process in waste alumina regenerative process according to claim 1, it is characterised in that: flue gas is in urgency
200 DEG C or less are down within 1s in cold tower (3).
5. the flue gas treating process in waste alumina regenerative process according to claim 1, it is characterised in that: step (4)
In, for flue gas after exchanging heat, temperature enters SCR denitration reaction device (7) after rising to 220 DEG C or more.
6. the flue gas processing device in a kind of any waste alumina regenerative process of claim 1-5, it is characterised in that: packet
Include sequentially connected dual firing chamber (1), waste heat boiler (2), chilling tower (3) and bag filter (5), bag filter (5) with it is remaining
Heat boiler (2) is connected, and waste heat boiler (2) is sequentially connected with SCR denitration reaction device (7) and alkali adsorption tower (6)；Chilling tower (3) goes out
Active carbon jetting device (4) are set on the flue of mouth；SCR denitration reaction device (7) is connected with spray ammonia grid (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910482247.4A CN110180389A (en) | 2019-06-04 | 2019-06-04 | Flue gas treating process and its device in waste alumina regenerative process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910482247.4A CN110180389A (en) | 2019-06-04 | 2019-06-04 | Flue gas treating process and its device in waste alumina regenerative process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110180389A true CN110180389A (en) | 2019-08-30 |
Family
ID=67720315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910482247.4A Withdrawn CN110180389A (en) | 2019-06-04 | 2019-06-04 | Flue gas treating process and its device in waste alumina regenerative process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110180389A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495143A (en) * | 2020-05-13 | 2020-08-07 | 东南大学 | SCR denitration system and method suitable for hazardous waste incinerator |
| CN113797728A (en) * | 2021-09-30 | 2021-12-17 | 灌南县同益金属有限公司 | Treatment method for smoke generated in valuable secondary material treatment process |
| CN116272302A (en) * | 2023-03-30 | 2023-06-23 | 北京市弘洁蓝天科技股份有限公司 | System and method for treating waste activated carbon regenerated tail gas |
-
2019
- 2019-06-04 CN CN201910482247.4A patent/CN110180389A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495143A (en) * | 2020-05-13 | 2020-08-07 | 东南大学 | SCR denitration system and method suitable for hazardous waste incinerator |
| CN113797728A (en) * | 2021-09-30 | 2021-12-17 | 灌南县同益金属有限公司 | Treatment method for smoke generated in valuable secondary material treatment process |
| CN116272302A (en) * | 2023-03-30 | 2023-06-23 | 北京市弘洁蓝天科技股份有限公司 | System and method for treating waste activated carbon regenerated tail gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104941423A (en) | Ammonia desulfurization and denitrification dedusting method and device utilizing catalytic cracking regeneration flue gas | |
| CN107376639B (en) | Hazardous waste incineration flue gas purification method | |
| CN110180389A (en) | Flue gas treating process and its device in waste alumina regenerative process | |
| CN203494378U (en) | SCR (Selective Catalytic Reduction) denitration device for controlling NOx of rotary cement kiln | |
| CN109806740A (en) | The method of coke oven flue gas desulphurization denitration | |
| CN102909104A (en) | Thermal regeneration method and device of SCR (selective catalytic reduction) denitration catalyst | |
| CN109499313A (en) | The low-temp desulfurization method of denitration of sintering flue gas | |
| CN108654363A (en) | Couple waste heat of coke-oven flue gas and amounts of sulphur contaminants acid-making process | |
| CN210051174U (en) | Flue gas treatment device in waste alumina regeneration process | |
| CN109513341A (en) | Pelletizing flue gas low-temperature desulfurization denitration method | |
| CN110194477A (en) | The regeneration and treatment technique and its device of waste alumina | |
| CN202725025U (en) | Waste gas purifying treatment device | |
| CN210159628U (en) | Regeneration treatment device for waste alumina | |
| CN105289299A (en) | SCR flue gas denitration process | |
| CN109499307A (en) | The desulfurization denitration method of pelletizing flue gas | |
| CN204724012U (en) | A kind of Dual alkali absorption plant purifying nox contained waste gas | |
| CN203316001U (en) | Boiler flue gas denitration device | |
| CN215863435U (en) | Industrial waste's processing apparatus | |
| CN216924371U (en) | Flue gas purification system for medical waste incineration | |
| CN109569277A (en) | The desulfurization denitration method of sintering flue gas | |
| CN109569276A (en) | The desulfurization denitration method of pelletizing flue gas | |
| CN111036072A (en) | Flue gas treatment system | |
| CN109569278A (en) | The desulfurization denitration method of sintering flue gas | |
| CN203525548U (en) | Equipment used for flue gas desulfurization and denitrification | |
| CN109569282A (en) | The desulfurization denitration method of pelletizing 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190830 |
|
| WW01 | Invention patent application withdrawn after publication |