CN205032040U - Integrated clean system of dry -type flue gas - Google Patents
Integrated clean system of dry -type flue gas Download PDFInfo
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- CN205032040U CN205032040U CN201520595445.9U CN201520595445U CN205032040U CN 205032040 U CN205032040 U CN 205032040U CN 201520595445 U CN201520595445 U CN 201520595445U CN 205032040 U CN205032040 U CN 205032040U
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- flue gas
- flue
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model provides an integrated clean system of dry -type flue gas. Boiler, dust pelletizing system, flue, milling machine, filtration system and cigarette including installing SNCR deNOx systems are steamed, boiler, dust pelletizing system, filtration system and the cigarette bittern of installing SNCR deNOx systems connect gradually through the flue, dust pelletizing system and the flue between the filtration system on be provided with the import of dry powder absorbent, the import of dry powder absorbent is through the exit linkage of pipeline with the milling machine, the milling machine on be equipped with absorbent entry and steam conduit. This clean system is absolutely dry formula desulfurization, denitration and the integration clean system that removes dust, and water consumption not reduces corrosion of equipment's risk.
Description
Technical field
The utility model belongs to flue gas desulfurization and denitrification technical field, is specifically related to a kind of integrated purification system of dry type flue gas.
Background technology
In view of the long-term existence of the energy resource structure of China based on coal, and process of industrialization high speed development in recent years, oxysulfide and nitrogen oxide have become China's Air Pollutants, and with the various ways such as acid rain, haze, heavy damage is caused to ecological environment, great negative effect is caused to whole national economy life.
Flue gas desulfurization and denitrification is the main measure of air contaminant treatment.Flue gas desulfurization technique is a lot of both at home and abroad at present, as limestone-gypsum method, ammonia process, Dual alkali, rotary spraying technique etc., wherein from the desulfur technology of industrialization, though have that floor space is large, operating cost is high, easy blocking, desulfurizing byproduct difficulty put, secondary pollution problems, and and be unwell to China's national situation, but due to history, what account for absolute leading position is still limestone-gypsum method.And in gas denitrifying technology, then selective catalytic reduction method (SCR), SNCR method (SNCR), electron beam irradiation method, impulse electric corona plasma method, red-hot carbon reduction method, low temperature normal atmosphere plasma decomposition methods etc. are wherein general with SCR method denitration application again.
And at present, in the world Application comparison widely flue gas desulfurization and denitrification technology be then utilize above-mentioned traditional flue gas desulfurization technique and SCR denitration technology combined, can the object of desulphurization denitration to reach.This technology can remove the oxysulfide of more than 90% and the nitrogen oxide of more than 80%, but SCR is high compared to SNCR investment, and operating cost is high; And the catalyst of inactivation is toxic, difficult treatment, changes new pollution sources into.
201410487170.7, name is called the utility application of " a kind of circulating fluid bed boiler desulfurization denitrating system ", the ammonia process of desulfurization and SNCR denitration technique is adopted to carry out desulphurization denitration, comprise CFBB, with the coal supply system of CFBB by pipeline communication, with the dreg removing system that the slag delivery outlet of CFBB is communicated with, with the dust pelletizing system that the exhanst gas outlet of CFBB is communicated with, with the induced draught system that the exhanst gas outlet of dust pelletizing system is communicated with, with the ammonia method desulfurizing system that the exhanst gas outlet of induced draught system is communicated with, the flue gas aftertreatment systems be communicated with the exhanst gas outlet of ammonia method desulfurizing system, with the sulphur ammonium treatment system of the sulphur ammonium outlet of ammonia method desulfurizing system, also comprise ammoniacal liquor and prepare storage system, ammoniacal liquor is prepared storage system and is communicated with SNCR denitration system with ammonia method desulfurizing system by ammoniacal liquor outlet, SNCR denitration system is communicated with CFBB by ammoniacal liquor outlet.Patent adopts SNCR denitration, and its denitration efficiency is only 20-70%, cannot reach at present the NO that " coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-2020) " proposes
xfor 50mg/nm
3" minimum discharge " standard.
201120500833.6, name is called the utility model patent of " coal fire discharged pollutant integration removes device ", comprise boiler, sack cleaner and wet desulfurizer, also comprise ammonia district, SNCR device and SCR device, ammonia district is located at the side of boiler, SNCR device is communicated with ammonia district by the first water influent pipeline, SNCR device is communicated with boiler by first row liquid pipeline, and the end of first row liquid pipeline extends in boiler, SCR device is communicated with boiler with time cigarette flue by exit flue, ammonia district is communicated with exit flue by the second air inlet pipeline, boiler is communicated with sack cleaner by the 3rd gas exhaust piping, sack cleaner is communicated with wet type desulfurizing tower apparatus by the 4th gas exhaust piping, 4th gas exhaust piping is provided with booster fan, wet type desulfurizing tower apparatus is provided with the exhaust outlet be connected with chimney.This patent adopts SNCR and SCR coupling, although can reach the environmental protection index requirement of country, investment and operating cost, apparently higher than being used alone SNCR, are simply piling up of traditional handicraft.
201410094300.0, name is called the utility application of " flue gas pollutant control integrated purification system ", concrete steps are as follows: A, flue gas and sodium bicarbonate powder are sent into circulating fluid bed reactor continuously, flue gas makes sodium bicarbonate powder be fluidisation state and reacts with it, or sodium bicarbonate powder is directly sprayed into flue and smoke reaction, tentatively removes sulfur and nitrogen oxides; B, the flue gas after the preliminary desulphurization denitration of step A is sent into the desulfurization section on absorption tower, utilize sodium bicarbonate aqueous solution to spray from top as absorbing liquid, contact with the flue gas adverse current entered from bottom, remove the oxysulfide in flue gas and other acidic components; Flue gas after C, desulfurization enters the denitration section on absorption tower, and utilize the oxidizing agent solution containing sodium acid carbonate to spray from top as absorbing liquid, remove the nitrogen oxide in flue gas further, the flue gas after purification is discharged from the top on absorption tower.The absorption tower denitration section of this patent adopts oxidizing process, and the corrosivity of oxidizing agent solution is very strong, so can increase considerably the cost on absorption tower and reduce the service life on absorption tower.In addition, because oxidant is usually expensive, its operating cost is also higher.
Utility model content
For above-mentioned technical problem, the utility model provides a kind of integrated purification system of dry type flue gas.This cleaning system is dry type desulphurization and denitration and dust removal integrated cleaning system, not water consumption, reduces the risk of equipment corrosion.
For achieving the above object, the utility model adopts following technical scheme:
An integrated purification system for dry type flue gas, is characterized in that: comprise the boiler, dust pelletizing system, flue, flour mill, filtration system and the cigarette halogen that are provided with SNCR denitration system; Described boiler, dust pelletizing system, the filtration system being provided with SNCR denitration system is connected by flue successively with cigarette halogen, flue between described dust pelletizing system and filtration system is provided with the import of dry powder absorbent, the import of dry powder absorbent is connected with the outlet of flour mill by pipeline, and described flour mill is provided with absorbent entrance and jet chimney.
Fire coal boiler fume first realizes entering flue after preliminary denitration through SNCR denitration system, dust in dust pelletizing system removing flue gas, after dry powder absorbent is ground into absorbent granules by flour mill, mixed with the flue gas in flue by the import of dry powder absorbent, realize the double purification of flue gas, the flue gas after purification after filtration system passes through smoke stack emission after filtering.Flour mill is provided with jet chimney.The spatial dispersion utilizing air-flow to drive absorbent in flour mill and turbulence, can realize the pulverizing of absorbent equally, operate very flexible.
Dry type flue gas desulfurizing denitrating system of the present utility model adopts SNCR system to NO
xremoval efficiency be 40-70%, making S/N in flue gas than increasing, contributing to the denitration efficiency improving dry powder jet segment; Most of dust again in dust pelletizing system removing flue gas, avoids dust to affect the desulphurization denitration of dry powder jet segment, improves the denitrification efficiency of dry powder jet segment further, make total denitration efficiency of native system be greater than 75%.In flue gas, spray dry powder absorbent by the dry powder absorbent import of flue and remove SO in flue gas
x, Hg, HCl, HF, H
2sO
4deng impurity and part NO
x, to SO
x, Hg, HCl, HF, H
2sO
4deng removal efficiency be greater than 95%.Siccative after desulphurization denitration is collected by the filtration system of postorder, so that subsequent treatment; Also can time of staying of prolong smoke, make the dry powder absorbent in flue gas be attached to filter course surface, define the desulfurized effect of fixed bed, make total desulfuration efficiency of native system reach more than 95%.
The mixed powder that filtration system described in the utility model is collected comprises the siccatives such as sodium sulphate, sodium nitrate, sodium sulfite, natrium nitrosum, niter cake, sodium hydrogensulfite and dust, as the raw materials for production of soda, chemical fertilizer, is convenient to collect, transport.
The reducing agent of SNCR system is carbonic hydroammonium or urea, the danger that there is not liquefied ammonia burning, blast and corrode.
Dust pelletizing system described in the utility model is electric dust removing system, electric bag composite dedusting system, bag-type dust removing system or Mobile pole plate electrostatic precipitation system.
Filtration system described in the utility model is filter bag type film filter or pulsed jet cloth filter.
Dry powder absorbent import department in flue of the present invention is provided with static mixer, make dry powder absorbent and flue gas mix evenly, the abundant mixing improving primary mixture and flue gas with contact.Described static mixer form is venturi type, diffusion tubular type, spiral, grating type, baffle-type etc.
Chimney import described in the utility model is provided with booster fan.
Flour mill described in the utility model is airflow milling, and airflow milling disposal ability is large, dry powder absorbent particle diameter can be milled to and be less than 1 μm, be beneficial to raising denitrification efficiency.
The water content of dry powder absorbent described in the utility model is 1%, and particle diameter is not more than 40 μm.Dry powder water content is low, and particle diameter is little, and the mobility of material is better.
The beneficial effects of the utility model are:
1, the utility model system is by SNCR and Dry denitration coupling, and the simple superposition of unconventional process, and after SNCR denitration, the sulphur nitrogen ratio in flue gas increases considerably, improve greatly dry powder jet segment denitration efficiency; Most of dust again in dust pelletizing system removing flue gas, avoids dust to affect the desulphurization denitration of dry powder jet segment, improves the denitrification efficiency of dry powder jet segment further; Simultaneously filtration system can time of staying of prolong smoke, and make the dry powder absorbent in flue gas be attached to filter course surface, define the desulfurized effect of fixed bed, achieve further desulfurization, make native system under anhydrous condition, denitration efficiency is greater than 75%.Desulfuration efficiency reaches more than 95%.
2, the powder after the desulfurization of the utility model system is siccative, is convenient to collect, transport and focus on, and full technical process produces without waste water.Traditional wet desulphurization needs spray cooling to be humidified, and outlet purifying smoke is saturated flue gas, and in former flue gas, water content is usually not enough, thus needs to consume a large amount of water resources for technique moisturizing.Native system technique is pure dry method, does not have the process that spray cooling is humidified, and does not need additionally to supplement fresh water (FW), not water consumption, reduces the risk of equipment corrosion.
3, because the temperature of most of flue gas is 120 ~ 180 DEG C, traditional wet desulphurization absorption operation requires that (about 60 DEG C) carry out just reaching higher desulfuration efficiency at a lower temperature; The purifying smoke of the desulfurization method discharge of the utility model system is dry flue gas, and with former Gas phase Smoke ratio, temperature can not reduce too much, just can reach good desulfurized effect, being beneficial to rising and the diffusion of flue gas without the need to carrying out cooling to flue gas, favourable to atmospheric environment.
4, the utility model system realize dust emission concentration≤10mg/Nm in purifying smoke
3, SO
2concentration of emission≤35mg/Nm
3, NO
xconcentration of emission≤50mg/Nm
3, desulfuration efficiency is greater than 95%, and denitration efficiency is greater than 75%.Remove the SO of more than 95% simultaneously
3, HCl, HF, H
2sO
4deng acidic materials and Hg, chimney breast dust emission concentration≤10mg/Nm that " coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-2020) " proposes can be reached
3, SO
2concentration of emission≤35mg/Nm
3, NOx emission concentration≤50mg/Nm
3" minimum discharge " standard.
Accompanying drawing explanation
Fig. 1 is the structure chart of the integrated purification system of dry type flue gas.
Be labeled as in figure: 1, SNCR boiler, 2, dust pelletizing system, 3, static mixer, 4, filtration system, 5, cigarette halogen, 6, exhanst gas outlet, 7, auxiliary flue, 8, flour mill, 9, flue, 10, jet chimney.
Detailed description of the invention
Below in conjunction with detailed description of the invention, essentiality content of the present utility model is described in further detail.
Embodiment 1
An integrated purification system for dry type flue gas, comprises the boiler 1, dust pelletizing system 2, flue 9, flour mill 8, filtration system 4 and the chimney 5 that are provided with SNCR denitration system; Described boiler 1, dust pelletizing system 2, the filtration system 4 being provided with SNCR denitration system is connected by flue 9 successively with chimney 5, flue between described dust pelletizing system 2 and filtration system 4 is provided with the import of dry powder absorbent, the import of dry powder absorbent is connected by the outlet of pipeline with flour mill 8, and described flour mill 8 is provided with absorbent entrance and jet chimney 10.
Embodiment 2
An integrated purification system for dry type flue gas, comprises the boiler 1, dust pelletizing system 2, flue 9, flour mill 8, filtration system 4 and the chimney 5 that are provided with SNCR denitration system; Described boiler 1, dust pelletizing system 2, the filtration system 4 being provided with SNCR denitration system is connected by flue 9 successively with chimney 5, flue between described dust pelletizing system 2 and filtration system 4 is provided with the import of dry powder absorbent, the import of dry powder absorbent is connected by the outlet of pipeline with flour mill 8, and described flour mill 8 is provided with absorbent entrance and jet chimney 10.
Described dust pelletizing system 2 is electric dust removing system.
Embodiment 3
An integrated purification system for dry type flue gas, comprises the boiler 1, dust pelletizing system 2, flue 9, flour mill 8, filtration system 4 and the chimney 5 that are provided with SNCR denitration system; Described boiler 1, dust pelletizing system 2, the filtration system 4 being provided with SNCR denitration system is connected by flue 9 successively with chimney 5, flue between described dust pelletizing system 2 and filtration system 4 is provided with the import of dry powder absorbent, the import of dry powder absorbent is connected by the outlet of pipeline with flour mill 8, and described flour mill 8 is provided with absorbent entrance and jet chimney 10.
Described dust pelletizing system 2 is electric bag composite dedusting system.
Described filtration system 4 is filter bag type film filter.
Embodiment 4
An integrated purification system for dry type flue gas, comprises the boiler 1, dust pelletizing system 2, flue 9, flour mill 8, filtration system 4 and the chimney 5 that are provided with SNCR denitration system; Described boiler 1, dust pelletizing system 2, the filtration system 4 being provided with SNCR denitration system is connected by flue 9 successively with chimney 5, flue between described dust pelletizing system 2 and filtration system 4 is provided with the import of dry powder absorbent, the import of dry powder absorbent is connected by the outlet of pipeline with flour mill 8, and described flour mill 8 is provided with absorbent entrance and jet chimney 10.
Described dust pelletizing system 2 is bag-type dust removing system.
Described filtration system 4 is pulsed jet cloth filter.
Described chimney import is provided with booster fan.
Embodiment 5
An integrated purification system for dry type flue gas, comprises the boiler 1, dust pelletizing system 2, flue 9, flour mill 8, filtration system 4 and the chimney 5 that are provided with SNCR denitration system; Described boiler 1, dust pelletizing system 2, the filtration system 4 being provided with SNCR denitration system is connected by flue 9 successively with chimney 5, flue between described dust pelletizing system 2 and filtration system 4 is provided with the import of dry powder absorbent, the import of dry powder absorbent is connected by the outlet of pipeline with flour mill 8, and described flour mill 8 is provided with absorbent entrance and jet chimney 10.
Described dust pelletizing system 2 is Mobile pole plate electrostatic precipitation system.
Described filtration system 4 is pulsed jet cloth filter.
Described chimney import is provided with booster fan.
Described flour mill 8 is airflow milling.
Embodiment 6
An integrated purification system for dry type flue gas, comprises the boiler 1, dust pelletizing system 2, flue 9, flour mill 8, filtration system 4 and the chimney 5 that are provided with SNCR denitration system; Described boiler 1, dust pelletizing system 2, the filtration system 4 being provided with SNCR denitration system is connected by flue 9 successively with chimney 5, flue between described dust pelletizing system 2 and filtration system 4 is provided with the import of dry powder absorbent, the import of dry powder absorbent is connected by the outlet of pipeline with flour mill 8, and described flour mill 8 is provided with absorbent entrance and jet chimney 10.
Described dust pelletizing system 2 is bag-type dust removing system.
Described filtration system 4 is filter bag type film filter.
Described chimney import is provided with booster fan.
Described flour mill 8 is airflow milling.
Dry powder absorbent import department in described flue 9 is provided with static mixer 3.
Dry powder absorbent described in the utility model is Na
2cO
3, NaHCO
3, one or more in NaOH.
Dry powder absorbent described in the utility model is CaCO
3, CaO, Ca (OH)
2in one or more.
Dry powder absorbent described in the utility model is for containing Na
2cO
3, NaHCO
3, NaOH, CaCO
3, CaO, Ca (OH)
2in one or more salkali waste.
Claims (6)
1. an integrated purification system for dry type flue gas, is characterized in that: comprise the boiler (1), dust pelletizing system (2), flue (9), flour mill (8), filtration system (4) and the chimney (5) that are provided with SNCR denitration system; Described boiler (1), dust pelletizing system (2), the filtration system (4) being provided with SNCR denitration system is connected by flue (9) successively with chimney (5), flue between described dust pelletizing system (2) and filtration system (4) is provided with the import of dry powder absorbent, the import of dry powder absorbent is connected by the outlet of pipeline with flour mill (8), and described flour mill (8) is provided with absorbent entrance and jet chimney (10).
2. the integrated purification system of a kind of dry type flue gas according to claim 1, is characterized in that: described dust pelletizing system (2) is electric dust removing system, electric bag composite dedusting system, bag-type dust removing system or Mobile pole plate electrostatic precipitation system.
3. the integrated purification system of a kind of dry type flue gas according to claim 1, is characterized in that: described filtration system (4) is filter bag type film filter or pulsed jet cloth filter.
4. the integrated purification system of a kind of dry type flue gas according to claim 1, is characterized in that: described chimney import is provided with booster fan.
5. the integrated purification system of a kind of dry type flue gas according to claim 1, is characterized in that: described flour mill (8) is airflow milling.
6. the integrated purification system of a kind of dry type flue gas according to claim 1, is characterized in that: the dry powder absorbent import department in described flue (9) is provided with static mixer (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520595445.9U CN205032040U (en) | 2015-08-10 | 2015-08-10 | Integrated clean system of dry -type flue gas |
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|---|---|---|---|
| CN201520595445.9U CN205032040U (en) | 2015-08-10 | 2015-08-10 | Integrated clean system of dry -type flue gas |
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|---|---|
| CN205032040U true CN205032040U (en) | 2016-02-17 |
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ID=55290975
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772487A (en) * | 2016-04-29 | 2016-07-20 | 义马环保电力有限公司 | Chromium slag pollutant, environmental protection processing method of soil polluted by chromium slag pollutant, obtained product and application |
| CN105964648A (en) * | 2016-04-29 | 2016-09-28 | 义马环保电力有限公司 | Environmentally-friendly treatment method for heavy-metal-included sludge of sewage treatment plant |
-
2015
- 2015-08-10 CN CN201520595445.9U patent/CN205032040U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772487A (en) * | 2016-04-29 | 2016-07-20 | 义马环保电力有限公司 | Chromium slag pollutant, environmental protection processing method of soil polluted by chromium slag pollutant, obtained product and application |
| CN105964648A (en) * | 2016-04-29 | 2016-09-28 | 义马环保电力有限公司 | Environmentally-friendly treatment method for heavy-metal-included sludge of sewage treatment plant |
| CN105964648B (en) * | 2016-04-29 | 2019-01-01 | 义马环保电力有限公司 | The environment-friendly treatment method of sludge containing heavy metal in sewage treatment plant |
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