CN208465583U - A kind of biomass flue gas dust-removal and desulfurizing denitrating system - Google Patents
A kind of biomass flue gas dust-removal and desulfurizing denitrating system Download PDFInfo
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- CN208465583U CN208465583U CN201820924607.2U CN201820924607U CN208465583U CN 208465583 U CN208465583 U CN 208465583U CN 201820924607 U CN201820924607 U CN 201820924607U CN 208465583 U CN208465583 U CN 208465583U
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- flue gas
- active carbon
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- dust
- gas outlet
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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
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The utility model discloses a kind of biomass flue gas dust-removal and desulfurizing denitrating systems, including bag filter, active carbon denitrification apparatus and desulfurizer, bag filter air inlet is connected to by mixed smoke-box with biomass boiler flue gas input pipe, and the gas outlet that flue gas after desulfurization feeds back pipe is connected to mixed smoke-box；It is equipped with dust-removal cloth-bag in the air-purifying chamber of bag filter, gas outlet is equipped at the top of air-purifying chamber, air-purifying chamber bottom end is equipped with ash bucket；The gas outlet of air-purifying chamber, ammonia input pipe pass through delivery pipe respectively and are connected to the air inlet of mixer, the gas outlet of mixer is connected to by delivery pipe with the air inlet of active carbon denitrification apparatus, the gas outlet of active carbon denitrification apparatus is connected to smoke stack emission pipe, the air inlet of active carbon denitrification apparatus is connected to flue gas regeneration delivery pipe, the gas outlet of active carbon denitrification apparatus is connected to the air inlet of desulfurizer, and the gas outlet of desulfurizer feeds back pipe with flue gas after desulfurization and is connected to.The system cost is low, denitrating flue gas is more efficient, can achieve minimum discharge standard requirements.
Description
Technical field
The utility model relates to gaseous contamination processing units, are exactly a kind of biomass flue gas dust-removal and desulfurizing denitration systems
System.
Background technique
Biomass boiler is a kind of using biomass energy as the boiler of fuel, and fuel biomass is a kind of renewable
Using the energy, bio-energy pellet fuel is to utilize stalk, rice stalk, yule logs, sawdust, peanut shell, melon seed cases, beet pulp, tree
The crops of all wastes such as skin are pulverized and mixed the techniques such as extruding drying, are eventually fabricated granular fuel.In its original of China
Material is widely distributed, and processing technology is advanced, and biomass energy particle material is famous with green coal, is a kind of clear energy sources, raw simultaneously
The price of substance boiler is lower and fuel cost is also low, is the new energy of both economical environmental protection.But biomass is in combustion process
In, it still can generate a large amount of dust, SO2And NOx pollutant, simultaneously because its dust, SO2, NOx and temperature problem so that
Biomass boiler dedusting, desulphurization and denitration are difficult, and cost is very high, and the mode of the processing of gas cleaning at present mainly has:
Flue gas ash removal process: due to biomass boiler, its water-in-fuel rate is higher, and ash content has very high viscosity, therefore
It is difficult to handle flue gas using common bag filter, technique more mature at present is removed using cyclone dust removal+cloth bag
The process of dirt removes a large amount of lightweight dust first with cyclone dust removal, while taking away the moisture in flue gas, recycles filtration velocity
Lower bag filter carries out gas cleaning processing.To reach the qualified discharge of dust.
Flue gas desulfurization course: since its primary combustion medium of biomass boiler is biomass, sulfur content in flue gas
It changes greatly, and overall sulfur content is lower, the SO in general flue gas2In 100~400mg/Nm3Between, content is low, at present state
The biomass boiler of interior installation flue gas desulfurization is less, and more mature technique is to utilize lime using limewash method flue gas desulfurization
Alkalinity, by the SO in flue gas2Purification generates by-product gypsum.Due to SO in flue gas2Concentration is very low, thus overall investment compared with
It is high.
Denitrating flue gas process: due to biomass boiler, its dust viscosity is higher, and contains the alkalinous metals such as Na, K in dust,
It is affected to denitrating catalyst, and after dedusting, flue-gas temperature is low, do not have the temperature range of construction SCR denitration system, because
Domestic biomass boiler denitrating flue gas process generally uses SNCR to carry out gas cleaning at present for this, but its denitration of SNCR system is imitated
Rate is low, and the escaping of ammonia is high, be easy to cause secondary pollution.And by after dedusting, then if carrying out flue gas heating SCR denitration, the energy disappears
Consumption is too high, and economy is very poor, therefore biomass boiler denitrating flue gas process is currently without good solution.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of biomass flue gas dust-removal and desulfurizing denitrating system, the systems
Flue gas ash removal, desulphurization and denitration process are all completed after furnace, and the influence to boiler is effectively reduced, simultaneously because SO2It obtains
Enrichment, desulphurization system cost substantially reduce, and exhaust gas dust property is improved, and dust pelletizing system cost can also reduce.Denitration system
Activated carbon catalysis reduction principle is utilized in system, and no coupling product generates, and the escaping of ammonia is low, active carbon no consumption itself, therefore running cost
With lower, and denitrating flue gas is more efficient, can achieve minimum discharge standard requirements.
In order to solve the above technical problems, the utility model uses following technological means:
A kind of biomass flue gas dust-removal and desulfurizing denitrating system, including bag filter, active carbon denitrification apparatus and desulfurization dress
It sets, bag filter air inlet is connected to by mixed smoke-box with biomass boiler flue gas input pipe, and flue gas after desulfurization feeds back going out for pipe
Port is connected to mixed smoke-box；It is equipped with dust-removal cloth-bag in the air-purifying chamber of bag filter, is equipped with gas outlet, air-purifying chamber at the top of air-purifying chamber
Bottom end is equipped with ash bucket；The gas outlet of air-purifying chamber, ammonia input pipe pass through delivery pipe respectively and are connected to the air inlet of mixer, mixer
Gas outlet be connected to the air inlet of active carbon denitrification apparatus by delivery pipe, the gas outlet of active carbon denitrification apparatus and chimney row
Put pipe connection, the air inlet of active carbon denitrification apparatus is connected to flue gas regeneration delivery pipe, the gas outlet of active carbon denitrification apparatus and
The air inlet of desulfurizer is connected to, and the gas outlet of desulfurizer feeds back pipe with flue gas after desulfurization and is connected to.
The utility model by adopting the above technical scheme, compared with prior art, the feature protruded is:
Flue gas ash removal, desulphurization and denitration process are all completed after furnace, and the influence to boiler is effectively reduced, simultaneously because
SO2It is enriched with, desulphurization system cost substantially reduces, and exhaust gas dust property is improved, and dust pelletizing system cost can also drop
It is low.Activated carbon catalysis reduction principle is utilized in denitrating system, and no coupling product generates, and the escaping of ammonia is low, active carbon no consumption itself, because
This operating cost is lower, and denitrating flue gas is more efficient, can achieve minimum discharge standard requirements.
Further optimal technical scheme is as follows:
Biomass boiler original flue gas is mixed by the flue gas after feeding back the desulfurization of pipe conveying with flue gas after desulfurization first, makes cigarette
Dust in gas is modified, while flue gas moisture content sharp fall, is conducive to remove, mixed flue gas is removed by cloth bag
Dirt device, bag filter use offline van-type pulse dust collector, and flue gas enters bag filter, filtration velocity control by raising middle flask
Major part exhaust gas dust can remove by the filtration of dust-removal cloth-bag in 0.8m/s, clean flue gas is collected from air-purifying chamber
Into junior's purification system, ashes point is collected by ash bucket and regular outlet.
Top in the air-purifying chamber is equipped with pressure stabilizing gas bag, and compressed air input pipe passes through pressure stabilizing gas bag and dust-removal cloth-bag
Connection.
After a period of work, impulse soot blowing is carried out to dust-removal cloth-bag using compressed air input pipe, with 4 pressure stabilizing gas bags
Pressure stabilizing is carried out, the ash that dust-removal cloth-bag is assembled is blown off into ash bucket, realizes entire dust subtractive process.
The active carbon denitrification apparatus is equipped with the activated charcoal unit that can work independently connected side by side, each active carbon list
There is the work of separate valve control activated charcoal unit before and after the unit process case of member.
Above-mentioned setting is, it can be achieved that any one activated charcoal unit works online, or stops working offline, convenient for according to flue gas
Actual conditions carry out cooperating.
Multilayer active carbon filler is set in the activated charcoal unit.
In each activated charcoal unit, 8 active carbon filler of multilayer is set by processing capacity, active carbon is to SO2There is extremely strong suction
Attached effect, can be to low concentration SO in flue gas2It is adsorbed, reaches very low discharge standard, while active carbon can be used as and urge
Agent utilizes the NH in flue gas3NO in flue gas is restored.Its temperature is just in activated carbon catalysis reduction denitration most
Good reaction temperature section, desulfurization and denitration efficiency are higher.Desulfurization and the dust removal process of flue gas may be implemented.
Flow straightening grid is arranged in front end in the unit process case of each activated charcoal unit.
Flow straightening grid is arranged in front end in unit process case, and flue gas is rectified, and stablizes flue gas flow field, overall activity charcoal
Squarely or original shape reactor, vertical or horizontal installation is arranged in unit.
Temperature and pressure sensor is set before and after the unit process case of the activated charcoal unit.
By the way that temperature and pressure sensor is arranged, it is monitored convenient for the parameter to gas.
It is connected to before the unit process case of the activated charcoal unit with flue gas regeneration delivery pipe.
Since active carbon is to SO2There is Preferential adsorption effect, so excessive absorption SO2It is de- to will lead to activated carbon catalysis reduction
Therefore the decline of nitre efficiency after a period of time, needs to carry out active carbon case one by one flue gas regeneration, flue gas regeneration uses 350 DEG C of cigarettes
Gas regenerates 6 activated charcoal units, the SO adsorbed in active carbon2It can be parsed, SO in the flue gas after parsing2Content can be rich
30 times of collection or more, concentration is up to 6000mg/Nm3More than, parsing exhaust gas volumn is small, therefore the desulfurizing tower of very little is only needed to can be realized
Flue gas desulfurization course, the desulfuration efficiency of flue gas desulfurization course do not require too high yet, can effectively reduce Ca/S ratio in this way, reduce desulfurization
System building and operating cost.
Active layer, spraying layer are equipped in the desulfurizer, active layer is set to above spraying layer, active layer, spraying
Layer is connected to technique water inlet pipe, liquid alkaline input pipe respectively.
Lye (urea, milk of lime, sodium carbonate) is sprayed into desulfurizing tower, it is by spraying layer, alkalinity is molten in desulfurizing tower
Liquid carries out injection and carries out Dry FGD；The active layer of upper layer setting, active layer are activated using process water, are further dropped
Low reaction temperatures promote desulfuration efficiency.After regenerated flue gas is by purification, SO2Concentration can be reduced to 200~400mg/Nm3Left and right,
Identical as the original smoke density of biomass boiler, regenerated flue gas is incorporated to purification system front end later, and dust pelletizing system efficiency can be improved,
Simultaneously as regenerated flue gas temperature is higher, it can also be improved the flue-gas temperature into bag filter, make flue gas in dew-point temperature
More than, reduce the failures such as bag filter cloth bag knot ash.
The air inlet of the desulfurizer is connected to by inlet cooling device with the gas outlet of active carbon denitrification apparatus.
The sweetening process of regenerated flue gas, using semi-dry process flue gas desulphurization process, some processes water is sprayed into because temperature is higher
Desulfurizing tower carries out flue gas and cools down and activate in advance, to improve treatment effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Description of symbols: 1- bag filter；2- ash bucket；3- dust-removal cloth-bag；4- air-purifying chamber；Cigarette after 5- desulfurization
Gas feeds back pipe；6- smoke stack emission pipe；7- inlet cooling device；8- desulfurizer；9- is sprayed layer；10- active layer；11-
Active carbon filler；12- activated charcoal unit；13- flow straightening grid；14- mixer；15- pressure stabilizing gas bag；The input of 16- process water
Pipe；17- liquid alkaline input pipe；18- flue gas regenerates delivery pipe；19- ammonia input pipe；20- compressed air input pipe；21- biology
Matter boiler smoke input pipe；22- mixes smoke-box.
Specific embodiment
Below with reference to embodiment, the utility model is further illustrated.
Referring to Fig. 1 it is found that a kind of biomass flue gas dust-removal and desulfurizing denitrating system of the utility model, by bag filter 1,
Active carbon denitrification apparatus and desulfurizer 8 form；1 air inlet of bag filter is defeated by mixed smoke-box 22 and biomass boiler flue gas
Enter the connection of pipe 21, the gas outlet that flue gas after desulfurization feeds back pipe 5 is connected to mixed smoke-box 22；It is equipped in the air-purifying chamber 4 of bag filter 1
Dust-removal cloth-bag 3, gas outlet is equipped at the top of air-purifying chamber 4, and 4 bottom end of air-purifying chamber is equipped with ash bucket 2；The gas outlet of air-purifying chamber 4, ammonia input pipe
19 are connected to by delivery pipe with the air inlet of mixer 14 respectively, and the gas outlet of mixer 14 passes through delivery pipe and active carbon denitration
The air inlet of device is connected to, and the gas outlet of active carbon denitrification apparatus is connected to smoke stack emission pipe 6, the air inlet of active carbon denitrification apparatus
Mouth is connected to flue gas regeneration delivery pipe 18, and the gas outlet of active carbon denitrification apparatus is connected to the air inlet of desulfurizer 8, desulfurization dress
It sets 8 gas outlet and flue gas after desulfurization feeds back pipe 5 and is connected to.
Biomass boiler original flue gas is mixed by the flue gas after feeding back the desulfurization of the conveying of pipe 5 with flue gas after desulfurization first, is made
Dust in flue gas is modified, while flue gas moisture content sharp fall, is conducive to remove, mixed flue gas passes through cloth bag
Deduster 1, bag filter 1 use offline van-type pulse dust collector, and flue gas enters bag filter 1 by raising middle flask, filter wind
Speed control is in 0.8m/s, by the filtration of dust-removal cloth-bag 3, can remove major part exhaust gas dust, and clean flue gas is from net
Gas chamber 4, which is collected, enters junior's purification system, and ashes point is collected by ash bucket 2 and regular outlet.
Top in air-purifying chamber 4 is equipped with pressure stabilizing gas bag 15, and compressed air input pipe 20 passes through pressure stabilizing gas bag 15 and dust removing cloth
Bag 3 is connected to.
After a period of work, impulse soot blowing is carried out to dust-removal cloth-bag 3 using compressed air input pipe 20, with 4 pressure stabilizings
Gas bag 15 carries out pressure stabilizing, and the ash that dust-removal cloth-bag 3 is assembled is blown off into ash bucket 2, realizes entire dust subtractive process.
Active carbon denitrification apparatus is equipped with the activated charcoal unit 12 that can work independently connected side by side, each activated charcoal unit 12
Unit process case before and after have the work of separate valve control activated charcoal unit 12.
Above-mentioned setting is, it can be achieved that any one activated charcoal unit 12 works online, or stops working offline, convenient for according to cigarette
The actual conditions of gas carry out cooperating.
Multilayer active carbon filler 11 is set in activated charcoal unit 12.
In each activated charcoal unit 12,8 active carbon filler 11 of multilayer is set by processing capacity, active carbon is to SO2Have extremely strong
Suction-operated, can be to low concentration SO in flue gas2It is adsorbed, reaches very low discharge standard, while active carbon can be made
For catalyst, the NH in flue gas is utilized3NO in flue gas is restored.Its temperature is just in activated carbon catalysis reduction denitration
Optimal reaction temperature section, desulfurization and denitration efficiency are higher.Desulfurization and the dust removal process of flue gas may be implemented.
Flow straightening grid 13 is arranged in front end in the unit process case of each activated charcoal unit 12.
Flow straightening grid 13 is arranged in front end in unit process case, and flue gas is rectified, and stablizes flue gas flow field, overall activity
Squarely or original shape reactor, vertical or horizontal installation is arranged in charcoal unit 12.
Temperature and pressure sensor is set before and after the unit process case of activated charcoal unit 12.
By the way that temperature and pressure sensor is arranged, it is monitored convenient for the parameter to gas.
It is connected to before the unit process case of activated charcoal unit 12 with flue gas regeneration delivery pipe 18.
Since active carbon is to SO2There is Preferential adsorption effect, so excessive absorption SO2It is de- to will lead to activated carbon catalysis reduction
Therefore the decline of nitre efficiency after a period of time, needs to carry out active carbon case one by one flue gas regeneration, flue gas regeneration uses 350 DEG C of cigarettes
Gas regenerates 6 activated charcoal units 12, the SO adsorbed in active carbon2It can be parsed, SO in the flue gas after parsing2Content can
30 times of enrichment or more, concentration is up to 6000mg/Nm3More than, parsing exhaust gas volumn is small, therefore only needs the desulfurizing tower of very little can be real
Existing flue gas desulfurization course, the desulfuration efficiency of flue gas desulfurization course do not require too high yet, can effectively reduce Ca/S ratio in this way, reduce de-
Sulphur system building and operating cost.
Active layer 10, spraying layer 9 are equipped in desulfurizer 8, active layer 10 is set to spraying 9 top of layer, active layer 10, spray
Mist layer 9 is connected to technique water inlet pipe 16, liquid alkaline input pipe 17 respectively.
Lye (urea, milk of lime, sodium carbonate) is sprayed into desulfurizing tower, it, will be alkaline by spraying layer 9 in desulfurizing tower
Solution carries out injection and carries out Dry FGD；The active layer 10 of upper layer setting, active layer 10 are activated using process water, into
One step reduces reaction temperature, promotes desulfuration efficiency.After regenerated flue gas is by purification, SO2Concentration can be reduced to 200~400mg/Nm3
Left and right, identical as the original smoke density of biomass boiler, regenerated flue gas is incorporated to purification system front end later, and dust pelletizing system can be improved
Efficiency can also be improved the flue-gas temperature into bag filter 1, revealing flue gas simultaneously as regenerated flue gas temperature is higher
More than point temperature, reduce the failures such as 1 cloth bag knot ash of bag filter.
The air inlet of desulfurizer 8 is connected to by inlet cooling device 7 with the gas outlet of active carbon denitrification apparatus.
The sweetening process of regenerated flue gas, using semi-dry process flue gas desulphurization process, some processes water is sprayed into because temperature is higher
Desulfurizing tower carries out flue gas and cools down and activate in advance, to improve treatment effect.
The present embodiment, flue gas ash removal, desulphurization and denitration process are all completed after furnace, and the influence to boiler is effectively reduced,
Simultaneously because SO2It is enriched with, desulphurization system cost substantially reduces, and exhaust gas dust property is improved, and dust pelletizing system is made
Valence can also reduce.Activated carbon catalysis reduction principle is utilized in denitrating system, and no coupling product generates, and the escaping of ammonia is low, active carbon itself
No consumption, therefore operating cost is lower, and denitrating flue gas is more efficient, can achieve minimum discharge standard requirements.
The above is only the preferred feasible embodiment of the utility model, not thereby limits to the power of the utility model
Sharp range, it is all with the variation of equivalent structure made by the utility model specification and accompanying drawing content, it is both contained in the utility model
Interest field within.
Claims (9)
1. a kind of biomass flue gas dust-removal and desulfurizing denitrating system, including bag filter, active carbon denitrification apparatus and desulfurizer,
It is characterized by: the bag filter air inlet is connected to by mixed smoke-box with biomass boiler flue gas input pipe, after desulfurization
The gas outlet that flue gas feeds back pipe is connected to mixed smoke-box；It is equipped with dust-removal cloth-bag in the air-purifying chamber of bag filter, is set at the top of air-purifying chamber
There is gas outlet, air-purifying chamber bottom end is equipped with ash bucket；The gas outlet of air-purifying chamber, ammonia input pipe pass through respectively delivery pipe and mixer into
The gas outlet of port connection, mixer is connected to by delivery pipe with the air inlet of active carbon denitrification apparatus, active carbon denitrification apparatus
Gas outlet be connected to smoke stack emission pipe, the air inlet of active carbon denitrification apparatus be connected to flue gas regeneration delivery pipe, and active carbon takes off
The gas outlet of nitre device is connected to the air inlet of desulfurizer, and the gas outlet of desulfurizer feeds back pipe with flue gas after desulfurization and is connected to.
2. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that: in the air-purifying chamber
Top be equipped with pressure stabilizing gas bag, compressed air input pipe is connected to by pressure stabilizing gas bag with dust-removal cloth-bag.
3. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that: the active carbon is de-
Nitre device is equipped with the activated charcoal unit that can work independently connected side by side, has before and after the unit process case of each activated charcoal unit
The work of separate valve control activated charcoal unit.
4. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 3, it is characterised in that: the active carbon list
Multilayer active carbon filler is set in first.
5. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 3, it is characterised in that: each activity
Flow straightening grid is arranged in front end in the unit process case of charcoal unit.
6. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 3, it is characterised in that: the active carbon list
Temperature and pressure sensor is set before and after the unit process case of member.
7. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 3, it is characterised in that: the active carbon list
It is connected to before the unit process case of member with flue gas regeneration delivery pipe.
8. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that: the desulfurizer
Interior to be equipped with active layer, spraying layer, active layer is set to above spraying layer, active layer, spraying layer respectively with technique water inlet pipe, liquid
The connection of alkali input pipe.
9. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that: the desulfurizer
Air inlet be connected to the gas outlet of active carbon denitrification apparatus by inlet cooling device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820924607.2U CN208465583U (en) | 2018-06-14 | 2018-06-14 | A kind of biomass flue gas dust-removal and desulfurizing denitrating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820924607.2U CN208465583U (en) | 2018-06-14 | 2018-06-14 | A kind of biomass flue gas dust-removal and desulfurizing denitrating system |
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| CN208465583U true CN208465583U (en) | 2019-02-05 |
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ID=65213774
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| CN201820924607.2U Expired - Fee Related CN208465583U (en) | 2018-06-14 | 2018-06-14 | A kind of biomass flue gas dust-removal and desulfurizing denitrating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108499344A (en) * | 2018-06-14 | 2018-09-07 | 河北星耀环境科技有限公司 | A kind of biomass flue gas dust-removal and desulfurizing denitrating system |
| CN110743318A (en) * | 2019-12-11 | 2020-02-04 | 广东风和洁净工程有限公司 | Purification system combining hollow fiber membrane dust collector and activated carbon gas treatment device |
-
2018
- 2018-06-14 CN CN201820924607.2U patent/CN208465583U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108499344A (en) * | 2018-06-14 | 2018-09-07 | 河北星耀环境科技有限公司 | A kind of biomass flue gas dust-removal and desulfurizing denitrating system |
| CN110743318A (en) * | 2019-12-11 | 2020-02-04 | 广东风和洁净工程有限公司 | Purification system combining hollow fiber membrane dust collector and activated carbon gas treatment device |
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