CN205340542U - Low low temperature dust removal SOx/NOx control system - Google Patents
Low low temperature dust removal SOx/NOx control system Download PDFInfo
- Publication number
- CN205340542U CN205340542U CN201620068948.5U CN201620068948U CN205340542U CN 205340542 U CN205340542 U CN 205340542U CN 201620068948 U CN201620068948 U CN 201620068948U CN 205340542 U CN205340542 U CN 205340542U
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- heat exchanger
- low temperature
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- removal
- dust
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- 239000000428 dust Substances 0.000 title abstract description 13
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 30
- 239000003546 flue gas Substances 0.000 claims abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000023556 desulfurization Effects 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- 230000003009 desulfurizing effect Effects 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 235000019738 Limestone Nutrition 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 6
- 239000012717 electrostatic precipitator Substances 0.000 abstract description 4
- 231100000572 poisoning Toxicity 0.000 abstract description 3
- 230000000607 poisoning effect Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model provides a low low temperature dust removal SOx/NOx control system, includes first heat exchanger (1), electrostatic precipitator (2), desulfurization absorption tower (3), second heat exchanger (4), low temperature SCR reactor (5), pipeline (6), flue (7), its characterized in that: first heat exchanger (1), electrostatic precipitator (2), desulfurization absorption tower (3), second heat exchanger (4), low temperature SCR reactor (5) loop through flue (7) and link to each other, first heat exchanger (1), second heat exchanger (4) are connected through pipeline (6). The utility model discloses gas temperature is adjusted to make full use of gas - liquid heat exchanger, and heat exchange efficiency is high, combines together low temperature electric precipitation, wet flue gas desulfurization, low temperature SCR denitration technique, is favorable to getting rid of of SO3, reduces dust specific resistance, reduces low temperature SCR catalyst poisoning probability, improves flue gas dust removal, desulfurization, denitration efficiency. Utilized two heats that the heat exchanger was displaced out, the further improvement hangs down low temperature electrostatic precipitator efficiency.
Description
Technical field
This utility model relates to a kind of flue-gas dust-removing and desulfurization denitrating system, particularly low low-temperature flue gas dust-removal and desulfurizing denitration.
Background technology
Low temperature SCR denitration, be core with low-temperature SCR catalyst a kind of denitration technology, after being normally at dust-removing desulfurating apparatus, for reducing agent, NOx in flue gas can be reduced to N with ammonia at 100-200 DEG C2, so that denitrating flue gas.Its shortcoming is the SO contained in flue gas2/SO3Easily react generation ammonium sulfate with reducing agent ammonia, cause catalyst poisoning；And flue gas is after wet desulphurization, owing to temperature is too low, it is necessary to reheating could denitration.
The patent No. is that CN105169942A " flue gas of glass melting furnace dust-removal and desulfurizing denitration is collaborative to be processed and processing method and application " provides a kind of flue-gas dust-removing and desulfurization denitration and works in coordination with the scheme of process, program structure is complex, adopt bag type dust removing technology, compared with electrostatic precipitation technology, the process of inapplicable big exhaust gas volumn, and dedusting drag losses is big.The patent No. is that CN204841382U " a kind of glass furnace low-temperature denitration device " provides a kind of glass furnace low-temperature denitration device, desulfurization chamber, electric cleaner, low temperature SCR denitration room are sequentially connected with by this device, adopt the technology that dry desulfurization combines with electric precipitation, but there is SO3The shortcoming that clearance is low.Patent No. CN203494378U " SCR denitration device that cement rotary furnace NOx controls " provides a kind of cement rotary furnace NOx SCR denitration device controlled, this device utilizes flue gas to carry out gas-gas heat exchange, there is the shortcoming that heat exchange efficiency is low, utilize flue gas recirculation heat exchange can increase boiler induced-draft fan load.
Low low temp. electric cleaner unit is a kind of new high-efficient electrostatic precipitator, and its principle is to increase heat-exchange system before electric cleaner to make ash-laden gas temperature reach below dew point (85-90 DEG C), the SO in flue gas3Formation sulfuric acid mist can be condensed because temperature reduces, be adsorbed on dust, it is possible to effectively remove SO3Reduce the ratio resistance of dust, improve efficiency of dust collection, reduce energy consumption.The many employings of heat exchanger of low low temp. electric cleaner unit with water be medium GGH or low-level (stack-gas) economizer, its heat displaced, if effectively utilizing, can improve low low temp. electric cleaner unit technology further.
Utility model content
For solving the problems referred to above, this utility model provide a kind of there is simple in construction, the scheme that compact, the suitability is strong.
This utility model adopts following scheme: a kind of low temperature dust-removal and desulfurizing denitrating system, including First Heat Exchanger 1, electric cleaner 2, desulfuration absorbing tower the 3, second heat exchanger 4, low-temperature SCR reactor 5, wherein First Heat Exchanger 1, electric cleaner 2, desulfuration absorbing tower the 3, second heat exchanger 4, low-temperature SCR reactor 5 pass sequentially through flue 7 and are connected；First Heat Exchanger the 1, second heat exchanger 4 is connected by pipeline 6.
Preferably, First Heat Exchanger 1, second heat exchanger 4 of a kind of low temperature dust-removal and desulfurizing denitrating system is gas-liquid heat-exchange.
Preferably, the liquid medium of a kind of low temperature dust-removal and desulfurizing denitrating system is recycled by First Heat Exchanger the 1, second heat exchanger 4 and pipeline 6.
Preferably, the liquid medium in First Heat Exchanger 1, second heat exchanger 4 of a kind of low temperature dust-removal and desulfurizing denitrating system is water.
Preferably, the flue gas of a kind of low temperature dust-removal and desulfurizing denitrating system enters electric cleaner 2 after dropping to 85 DEG C 90 DEG C by temperature after First Heat Exchanger 1.
Preferably, the desulfuration absorbing tower 3 of a kind of low temperature dust-removal and desulfurizing denitrating system is wet-type absorption tower.
Preferably, Wet Limestone Desulfurization, double alkali method desulfurizing or magnesium processes desulfurization are adopted in the wet-type absorption tower of a kind of low temperature dust-removal and desulfurizing denitrating system..
Preferably, the flue gas of a kind of low temperature dust-removal and desulfurizing denitrating system enters low-temperature SCR reactor 5 after being increased to 120 DEG C 200 DEG C by temperature after the second heat exchanger 4.
Preferably, the low-temperature SCR reactor 5 of a kind of low temperature dust-removal and desulfurizing denitrating system includes low temperature SCR denitration catalyst.
By the enforcement of technique scheme, this utility model provides the benefit that, flue gas is lowered the temperature by First Heat Exchanger 1, make it can enter electric cleaner below dew point temperature, thus high-effective dust-removing, through desulfurizing tower desulfurization, flue gas is heated up by the second heat exchanger 4, enter low temperature SCR denitration reactor, NO_x Reduction by Effective can be reached in suitable temperature window, turn avoid catalyst SO simultaneously2/SO3Poisoning.This utility model purpose is in that making full use of gas-liquid heat-exchange regulates cigarette temperature, and heat exchange efficiency is high, low temp. electric dedusting, wet desulphurization, low temperature SCR denitration technology is combined, makes flue gas dedusting at low temperatures, desulfurization, denitration under preference temperature, be conducive to SO3Removal, reduce dust specific resistance, reduce the poisoning probability of low-temperature SCR catalyst, improve flue gas ash removal, desulphurization and denitration efficiency.This utility model effectively takes full advantage of the heat that two heat exchangers displace, and improves low low temp. electric dust collector efficiency further.
Accompanying drawing explanation
Fig. 1 is a kind of low temperature dust-removal and desulfurizing denitrating system schematic diagram of this utility model；
Wherein: 1 First Heat Exchanger, 2 electric cleaners, 3 desulfuration absorbing towers, 4 second heat exchangers, 5 low-temperature SCR reactors, 6 pipelines, 7 flues.
Detailed description of the invention
The technical solution of the utility model is carefully set forth below in conjunction with accompanying drawing:
A kind of low temperature dust-removal and desulfurizing denitrating system, including First Heat Exchanger 1, electric cleaner 2, desulfuration absorbing tower the 3, second heat exchanger 4, low-temperature SCR reactor 5, wherein First Heat Exchanger 1, electric cleaner 2, desulfuration absorbing tower the 3, second heat exchanger 4, low-temperature SCR reactor 5 pass sequentially through flue 7 and are connected；First Heat Exchanger the 1, second heat exchanger 4 is connected by pipeline 6.
First Heat Exchanger 1 entrance is connected with flue 7, First Heat Exchanger 1 outlet is connected with electric cleaner 2 entrance, electric cleaner 2 outlet is connected with desulfuration absorbing tower 3 entrance, desulfuration absorbing tower 3 outlet is connected with the second heat exchanger 4 entrance, second heat exchanger 4 outlet is connected with low temperature SCR denitration reactor 5 entrance, and low temperature SCR denitration reactor 5 outlet can be connected with chimney.Described First Heat Exchanger 1 and the second heat exchanger 4 are all gas-liquid heat-exchange, and in two heat exchangers, liquid medium is water, and be can be recycled by pipeline 6 connection.The built-in low temperature SCR denitration catalyst of low-temperature SCR reactor 5, its reaction temperature 120-200 DEG C.Described desulfuration absorbing tower 3 can be Wet Limestone Desulfurization, double alkali method desulfurizing or magnesium processes desulfurization.
Its operation principle is as follows:
Former flue gas enters after First Heat Exchanger 1, by making flue-gas temperature reduce with the heat exchange of WATER AS FLOW MEDIUM, reaches dew point temperature 85 DEG C-90 DEG C, WATER AS FLOW MEDIUM from the second heat exchanger 4, the SO in flue gas at this temperature3, because condensation forms sulfuric acid mist, being adsorbed on dust, reduce the ratio resistance of dust, after entering electric cleaner, the dust in flue gas by efficient paved set, can reduce electric cleaner energy consumption to a certain extent.Flue gas after dedusting is then through entering the second heat exchanger 4 after desulfurization adsorption tower desulfurization, WATER AS FLOW MEDIUM in First Heat Exchanger can make flue-gas temperature bring up to 120-200 DEG C, described second heat exchanger 4 medium hydro-thermal amount comes from First Heat Exchanger 1, flue gas after intensification finally enters back into low-temperature SCR reactor, under low-temperature SCR catalyst effect, with ammonia for reducing agent by the removal of nitrogen oxide in flue gas.Finally realize the low temperature dedusting of flue gas, desulphurization and denitration.
Claims (9)
1. a low temperature dust-removal and desulfurizing denitrating system, including First Heat Exchanger (1), electric cleaner (2), desulfuration absorbing tower (3), the second heat exchanger (4), low-temperature SCR reactor (5), pipeline (6), flue (7), it is characterised in that: described First Heat Exchanger (1), electric cleaner (2), desulfuration absorbing tower (3), the second heat exchanger (4), low-temperature SCR reactor (5) pass sequentially through flue (7) and are connected；Described First Heat Exchanger (1), the second heat exchanger (4) are connected by pipeline (6).
2. one low temperature dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that: described First Heat Exchanger (1), the second heat exchanger (4) they are gas-liquid heat-exchange.
3. one low temperature dust-removal and desulfurizing denitrating system according to claim 2, it is characterised in that: the liquid medium in described gas-liquid heat-exchange is recycled by First Heat Exchanger (1), the second heat exchanger (4) and pipeline (6).
4. one low temperature dust-removal and desulfurizing denitrating system according to claim 3, it is characterised in that: described liquid medium is water.
5. one low temperature dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that: flue gas enters electric cleaner (2) after dropping to 85 DEG C 90 DEG C by First Heat Exchanger (1) temperature afterwards.
6. one low temperature dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that: described desulfuration absorbing tower (3) is wet-type absorption tower.
7. one low temperature dust-removal and desulfurizing denitrating system according to claim 6, it is characterised in that: adopt Wet Limestone Desulfurization, double alkali method desulfurizing or magnesium processes desulfurization in described wet-type absorption tower.
8. one low temperature dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that: flue gas enters low-temperature SCR reactor (5) after being increased to 120 DEG C 200 DEG C by the second heat exchanger (4) temperature afterwards.
9. one low temperature dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that: described low-temperature SCR reactor (5) includes low temperature SCR denitration catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620068948.5U CN205340542U (en) | 2016-01-25 | 2016-01-25 | Low low temperature dust removal SOx/NOx control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620068948.5U CN205340542U (en) | 2016-01-25 | 2016-01-25 | Low low temperature dust removal SOx/NOx control system |
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| Publication Number | Publication Date |
|---|---|
| CN205340542U true CN205340542U (en) | 2016-06-29 |
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|---|---|---|---|
| CN201620068948.5U Active CN205340542U (en) | 2016-01-25 | 2016-01-25 | Low low temperature dust removal SOx/NOx control system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106139900A (en) * | 2016-08-30 | 2016-11-23 | 重庆泰克环保科技股份有限公司 | Glass high temperature kiln flue gas energy-saving and emission-reduction cleaning system and purification method |
| CN106540529A (en) * | 2016-12-23 | 2017-03-29 | 大连海事大学 | A kind of gas pollutant integrated treatment unit |
| CN107261820A (en) * | 2017-06-12 | 2017-10-20 | 北京科技大学 | A kind of denitrating system of the anti-poisoning of low temperature manganese-based catalyst |
| CN108176511A (en) * | 2018-01-10 | 2018-06-19 | 上海电力学院 | A kind of system with low-low temperature ESP based on thermo-electric generation |
| CN109173649A (en) * | 2018-05-28 | 2019-01-11 | 柏美迪康环境科技（上海）股份有限公司 | A kind of coke oven exhaust gas processing method and system |
| CN109173655A (en) * | 2018-10-31 | 2019-01-11 | 山东师范大学 | A kind of SCR denitration process of sintering flue gas |
| CN109621661A (en) * | 2018-12-10 | 2019-04-16 | 北京科技大学 | A kind of system and method for boiler smoke minimum discharge |
| CN111569559A (en) * | 2020-05-23 | 2020-08-25 | 河北化工医药职业技术学院 | Waste gas purification dust-free environment-friendly gas leakage monitoring system of dihydrate gypsum production line |
| CN113058405A (en) * | 2021-04-28 | 2021-07-02 | 华能南京金陵发电有限公司 | Boiler flue gas co-processing system and flue gas processing technology |
-
2016
- 2016-01-25 CN CN201620068948.5U patent/CN205340542U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106139900A (en) * | 2016-08-30 | 2016-11-23 | 重庆泰克环保科技股份有限公司 | Glass high temperature kiln flue gas energy-saving and emission-reduction cleaning system and purification method |
| CN106139900B (en) * | 2016-08-30 | 2019-06-21 | 重庆泰克环保科技股份有限公司 | Glass high temperature kiln flue gas energy-saving and emission-reduction purification method |
| CN106540529A (en) * | 2016-12-23 | 2017-03-29 | 大连海事大学 | A kind of gas pollutant integrated treatment unit |
| CN107261820A (en) * | 2017-06-12 | 2017-10-20 | 北京科技大学 | A kind of denitrating system of the anti-poisoning of low temperature manganese-based catalyst |
| CN108176511A (en) * | 2018-01-10 | 2018-06-19 | 上海电力学院 | A kind of system with low-low temperature ESP based on thermo-electric generation |
| CN109173649A (en) * | 2018-05-28 | 2019-01-11 | 柏美迪康环境科技（上海）股份有限公司 | A kind of coke oven exhaust gas processing method and system |
| CN109173655A (en) * | 2018-10-31 | 2019-01-11 | 山东师范大学 | A kind of SCR denitration process of sintering flue gas |
| CN109621661A (en) * | 2018-12-10 | 2019-04-16 | 北京科技大学 | A kind of system and method for boiler smoke minimum discharge |
| CN111569559A (en) * | 2020-05-23 | 2020-08-25 | 河北化工医药职业技术学院 | Waste gas purification dust-free environment-friendly gas leakage monitoring system of dihydrate gypsum production line |
| CN111569559B (en) * | 2020-05-23 | 2022-03-25 | 河北化工医药职业技术学院 | Waste gas purification dust-free environment-friendly gas leakage monitoring system of dihydrate gypsum production line |
| CN113058405A (en) * | 2021-04-28 | 2021-07-02 | 华能南京金陵发电有限公司 | Boiler flue gas co-processing system and flue gas processing technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tan Yue Inventor after: Zhang Xiaolong Inventor after: Du Xianchao Inventor after: Li Qingmin Inventor before: Zhang Xiaolong Inventor before: Tan Yue Inventor before: Du Xianchao Inventor before: Li Qingmin |
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| COR | Change of bibliographic data |