CN203123802U - System for eliminating dioxin and heavy metals in incineration gas - Google Patents
System for eliminating dioxin and heavy metals in incineration gas Download PDFInfo
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- CN203123802U CN203123802U CN2013200339064U CN201320033906U CN203123802U CN 203123802 U CN203123802 U CN 203123802U CN 2013200339064 U CN2013200339064 U CN 2013200339064U CN 201320033906 U CN201320033906 U CN 201320033906U CN 203123802 U CN203123802 U CN 203123802U
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- dioxin
- extracting tower
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- tower
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Abstract
The utility model provides a system for eliminating dioxin and heavy metals in incineration gas. The system aims at solving the problem that in a medical waste incineration gas purification device disclosed in CN201253533Y, the incineration gas enters a bag-type dust collector directly after passing through a half-drying deacidification tower, the step of adsorbing the dioxin in the incineration gas is omitted, so that the effect of treatment of the dioxin in the incineration gas is reduced. The key points of the system are as follows: a fluidized absorption bed and an electricity-bag dust collector are sequentially arranged between the half-drying deacidifiction tower and a wet deacidification tower, a waste water treatment device is arranged in back of the wet deacidificaiton tower, a water outlet of the waste water treatment device is accessed into a water inlet of the half-dry deacidification tower, and all the devices are connected through pipelines. The system has the beneficial effects of remarkably improving the treatment effect of the dioxin in the incineration gas, and being capable of dedusting and purifying with high efficiency, recycling waste water, and not generating outwards discharged process waste water.
Description
Technical field
The utility model relates to a kind of equipment of removing dioxin (Dioxin) and heavy metal in incineration flue gas simultaneously.
Background technology
CN201253533Y discloses a kind of medical refuse burning exhaust gas cleaner, and it is that incineration tail gas is handled through half dry type extracting tower, sack cleaner and the depickling of wet scrubbing tower successively.Its defective is: directly enter sack cleaner after through the half dry type extracting tower, lack the processing links of the dioxin in the absorption incineration tail gas, weakened the treatment effect to the dioxin in the incineration tail gas; Secondly, sack cleaner does not have filtration substantially for the flying dust that system produces; At last, for the waste water non-processor that produces in the system and the link of recycling.
Summary of the invention
In order to solve the problems of the technologies described above, the purpose of this utility model is to provide a kind of system of removing dioxin and heavy metal in incineration flue gas.
The purpose of this utility model is achieved in that it comprises half dry type extracting tower and wet type extracting tower, it is characterized in that: between half dry type extracting tower and wet type extracting tower, set gradually fluidisation adsorbent bed and electricity bag two-step filter (being electrostatic precipitator and sack cleaner), after the wet type extracting tower, wastewater treatment equipment is set, the delivery port of wastewater treatment equipment inserts the water inlet of half dry type extracting tower, is connected by pipeline between above-mentioned each device; Wherein the pipeline between half dry type extracting tower and fluidisation adsorbent bed arranges the silica absorbent funnel that feeds intake; Said fluidisation adsorbent bed is, two exhaust gases passes about the bed body of fluidisation adsorbent bed is, interlace at each road, exhaust gases passes left and right sides wall one group of fluidization distribution grid is set, every group of fluidization distribution grid that the fluidization distribution grid has several to be parallel to each other, downward-sloping 45 ° of each fluidization distribution grid (with 45 ° of horizontal line angles), about two exhaust gases passes the passway down; About discharge apparatus is installed under two exhaust gases passes mouths, seal between discharge apparatus and the fluidisation adsorbent bed.
The flue gas (200 ℃) that comes out from the half dry type extracting tower enters the fluidisation adsorbent bed, in flue gas, inject silica absorbent by the silica absorbent funnel that feeds intake simultaneously, enter the fluidisation adsorbent bed with flue gas, pass through left exhaust gases passes, discharge apparatus and right exhaust gases passes successively, through the left and right sides exhaust gases passes time, pass between two groups of fluidization distribution grids, flue gas and silica absorbent are fully mixed, can effectively adsorb the dioxin in the flue gas.The two-stage electric field dust collection section that the flue gas (180 ℃) that comes out from the fluidisation adsorbent bed enters electric bag dust collector carries out pre-dedusting, removes the flying dust of 80-90%.The flue gas that contains residue 10-20% flying dust enters the filter bag dust collection section of electric bag dust collector, further degree of depth udst separation again.
The waste water that the wet type extracting tower produces as alkaline water, is sent into the half dry type extracting tower after wastewater treatment equipment is removed heavy metal, the lime used with the half dry type extracting tower is mixed with milk of lime, and waste water recycles, and does not produce efflux technology waste water.
Compared with prior art, the beneficial effects of the utility model are: significantly improved the treatment effect to the dioxin in the incineration tail gas, and degree of depth dedusting, purification, waste water recycles, and does not produce efflux technology waste water.
Description of drawings
Further specify the utility model below in conjunction with accompanying drawing.
Fig. 1 is schematic diagram of the present utility model.
The specific embodiment
Between half dry type extracting tower 1 and wet type extracting tower 6, set gradually fluidisation adsorbent bed 3 and electricity bag two-step filter 4, wastewater treatment equipment 7 is set after the wet type extracting tower, the delivery port of wastewater treatment equipment inserts the water inlet of half dry type extracting tower, is connected by pipeline between above-mentioned each device; Wherein the pipeline between half dry type extracting tower and fluidisation adsorbent bed arranges the silica absorbent funnel 2 that feeds intake; Said fluidisation adsorbent bed is, the bed body of fluidisation adsorbent bed is left exhaust gases passes 31 and right exhaust gases passes 32, interlace at each road, exhaust gases passes left and right sides wall one group of fluidization distribution grid is set, every group of fluidization distribution grid 33 that the fluidization distribution grid has several to be parallel to each other, downward-sloping 45 ° of each fluidization distribution grid, present embodiment arranges 14 fluidization distribution grids altogether, about two exhaust gases passes the passway down; About discharge apparatus 8 is installed under two exhaust gases passes mouths, seal between discharge apparatus and the fluidisation adsorbent bed.
The course of work of the present utility model is:
1, contains HCL, SO
2Incineration flue gas (400-600 ℃) in sour gas, dioxin and heavy metal, at first enter the semidry method extracting tower, in tower, spray into alkaline matters such as milk of lime, milk of lime is atomized into fine particle through atomizer and fully contacts with high-temperature flue gas, the soda acid chemical reaction takes place, and removes the HCl more than 95%, SO in the gas
2, sour gas such as HF, simultaneously with about flue gas cool-down to 180 ℃.Water in the milk of lime is all vaporized.
2, the flue gas that comes out from the half dry type extracting tower (200 ℃) enters the fluidisation adsorbent bed, in flue gas, inject silica absorbent by the silica absorbent funnel that feeds intake simultaneously, enter the fluidisation adsorbent bed with flue gas, pass through left exhaust gases passes, discharge apparatus and right exhaust gases passes successively, through the left and right sides exhaust gases passes time, pass between two groups of fluidization distribution grids, flue gas and silica absorbent are fully mixed, can effectively adsorb the dioxin in the flue gas.
3, the flue gas that comes out from fluidisation adsorbent bed 3 (180 ℃) the two-stage electric field dust collection section that enters electric bag dust collector carries out pre-dedusting, removes the flying dust of 80-90%.The flue gas that contains residue 10-20% flying dust enters the filter bag dust collection section of electric bag dust collector, further degree of depth udst separation again.Before the filter bag dust collection section entrance of electric bag dust collector, in flue gas, inject activated carbon by given quantity feeding device 5, harmful substances such as the dioxin in the absorption flue gas and heavy metal.Owing to reduced the flying dust concentration in the bag dust collector, not only improved the content of activated carbon in the filtering layer of filter bag surface, and with the blowback time lengthening to 120 of filter bag minute.Therefore, realize the stage purification of flue gas Zhong bioxin, reduced the vibration frequency of cloth bag adsorption filtration layer, improved the stability of flue gas dioxin adsorption effect; Prolong the service life of cloth bag, and improved the service efficiency of active carbon greatly.Guarantee that the discharging of bioxin is less than 0.1ng TEQ/Nm
3Simultaneously, improved the removal efficient of heavy metal, can reach more than 95%.
3, enter a bag dedusting again from the electric field deduster flue gas that comes out, remaining flying dust in the flue gas is removed in further degree of depth udst separation.In bag dedusting entrance forward direction flue gas, inject activated carbon, harmful substances such as the dioxin in the absorption flue gas and heavy metal.Owing to reduced the flying dust concentration in the bag dust collector, not only improved the content of activated carbon in the filtering layer of filter bag surface, and with the reverse gas cleaning time lengthening to 120 of filter bag minute.Therefore, realize dioxin stage purification in the flue gas, reduced the vibration frequency of cloth bag adsorption filtration layer, improved the stability of dioxins in flue gas adsorption effect; Prolong the service life of cloth bag, and improved the service efficiency of active carbon greatly.Guarantee that the discharging of dioxin is less than 0.1ng TEQ/Nm
3Simultaneously, improved the removal efficient of heavy metal, can reach more than 95%.
4, the flue gas (160 ℃) after the dedusting enters wet type extracting tower 6, sprays into the aqueous solution of materials such as containing NaOH, mercury-removing reagent in tower, and the aqueous solution fully mixes with flue gas and contacts, and concurrent biochemical reaction further removes HCl, SO in the flue gas
2, heavy metal such as sour gas such as HF and mercury.
5, the waste water that produces of wet type extracting tower 6, as alkaline water, the lime used with half dry type extracting tower 1 is mixed with milk of lime after wastewater treatment equipment 7 is removed heavy metals, and waste water recycles, and does not produce efflux technology waste water.
Flue gas after being purified can satisfy revised " dangerous waste incineration pollution control criterion " (GB18484-2001) emission request.
Claims (1)
1. system of in incineration flue gas, removing dioxin and heavy metal, it comprises half dry type extracting tower and wet type extracting tower, it is characterized in that: between half dry type extracting tower and wet type extracting tower, set gradually fluidisation adsorbent bed and electricity bag two-step filter, after the wet type extracting tower, wastewater treatment equipment is set, the delivery port of wastewater treatment equipment inserts the water inlet of half dry type extracting tower, is connected by pipeline between above-mentioned each device; Wherein the pipeline between half dry type extracting tower and fluidisation adsorbent bed arranges the silica absorbent funnel that feeds intake; Said fluidisation adsorbent bed is, two exhaust gases passes about the bed body of fluidisation adsorbent bed is, interlace at each road, exhaust gases passes left and right sides wall one group of fluidization distribution grid is set, every group of fluidization distribution grid that the fluidization distribution grid has several to be parallel to each other, downward-sloping 45 ° of each fluidization distribution grid, about two exhaust gases passes the passway down; About discharge apparatus is installed under two exhaust gases passes mouths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200339064U CN203123802U (en) | 2013-01-23 | 2013-01-23 | System for eliminating dioxin and heavy metals in incineration gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200339064U CN203123802U (en) | 2013-01-23 | 2013-01-23 | System for eliminating dioxin and heavy metals in incineration gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203123802U true CN203123802U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200339064U Expired - Lifetime CN203123802U (en) | 2013-01-23 | 2013-01-23 | System for eliminating dioxin and heavy metals in incineration gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN203123802U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500105A (en) * | 2016-09-30 | 2017-03-15 | 江西东江环保技术有限公司 | The incineration treatment method of waste |
| CN106975305A (en) * | 2017-04-18 | 2017-07-25 | 宁波大学 | A kind of Bed Filtration dust pelletizing system |
-
2013
- 2013-01-23 CN CN2013200339064U patent/CN203123802U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500105A (en) * | 2016-09-30 | 2017-03-15 | 江西东江环保技术有限公司 | The incineration treatment method of waste |
| CN106975305A (en) * | 2017-04-18 | 2017-07-25 | 宁波大学 | A kind of Bed Filtration dust pelletizing system |
| CN106975305B (en) * | 2017-04-18 | 2022-07-15 | 宁波大学 | Granular bed filtering and dust removing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ENVIRONMENT PROT DANGEROUS ART Assignor: SHENYANG ACADEMY OF ENVIRONMENTAL SCIENCES Contract record no.: 2014210000089 Denomination of utility model: System for eliminating dioxin and heavy metals in incineration gas Granted publication date: 20130814 License type: Exclusive License Record date: 20141209 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: ENVIRONMENT PROT DANGEROUS ART Assignor: SHENYANG ACADEMY OF ENVIRONMENTAL SCIENCES Contract record no.: 2014210000089 Date of cancellation: 20150407 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ENVIRONMENT PROT DANGEROUS ART Assignor: SHENYANG ACADEMY OF ENVIRONMENTAL SCIENCES Contract record no.: 2015210000021 Denomination of utility model: System for eliminating dioxin and heavy metals in incineration gas Granted publication date: 20130814 License type: Exclusive License Record date: 20150407 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |