CN105588450A - Wet electric precipitation technique for comprehensive treatment of smoke of smelting furnace and heat preserving furnace for aluminum - Google Patents
Wet electric precipitation technique for comprehensive treatment of smoke of smelting furnace and heat preserving furnace for aluminum Download PDFInfo
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- CN105588450A CN105588450A CN201510972760.3A CN201510972760A CN105588450A CN 105588450 A CN105588450 A CN 105588450A CN 201510972760 A CN201510972760 A CN 201510972760A CN 105588450 A CN105588450 A CN 105588450A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/124—Liquid reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
- B01D2267/40—Different types of filters
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Electrostatic Separation (AREA)
Abstract
The invention discloses a wet electric precipitation technique for comprehensive treatment of the smoke of a smelting furnace and a heat preserving furnace for aluminum. The wet electric precipitation technique comprises the steps of pre-treatment, deep treatment, draining, and treatment of corresponding sewage and sludge. According to the step of pre-treatment, discharged wet electric precipitation sewage is used for a smoke regulation tower again after being treated, and the smoke is humidified, cooled, neutralized and pre-dedusted through the smoke regulation tower. According to the step of deep treatment, the pretreated smoke is delivered into a wet electric precipitator through an induced draft fan, a large number of electrons and positive ions are generated through ionization of high-voltage direct currents so that dust particles suspended in smoke flow can be electrified, and the electrified dust particles are adsorbed on the positive electrode under the action of electric field force. According to the technique, supporting sewage and sludge treatment facilities are arranged, and thus the problem of secondary sewage caused by wet electric precipitation is reasonably solved. The technological process is reasonable and compact, and strong corrosion of the smoke is effectively prevented; the wet electric precipitator is used as the main treatment device, and thus the wet electric precipitation technique has the characteristics that the system operation resistance is small, the operation cost is low, operation is stable, and the deacidification and precipitation efficiency is high.
Description
Technical field
The present invention is mainly concerned with smoke comprehensive and administers field, especially a kind of smelting furnace of aluminium, the wet-esp technique of holding furnace smoke comprehensive processing.
Background technology
Aluminium is carried out to melting and leave standstill in fuel (as natural gas, coal gas or light diesel fuel etc.) burning in the production process of (or insulation), flue-gas temperature, up to 450 DEG C, contains fuel combustion product (as H in flue gas2O and CO2), sour gas is (as HF, HCl, SO2、NO2And a small amount of Cl2Deng), the dust such as refining and coverture (as KCl, KF and ice crystal etc.), aluminium oxide and reduction carbon.
In aluminium founding processing enterprise production process, can produce a large amount of sour dust-laden high-temperature flue gas that contains, if do not processed, will be to environment. These have flue dust particle diameter containing sour dust-laden high-temperature flue gas, and little (0.5 ~ 50 μ m), exhaust gas volumn vary within wide limits, water content is large, dew-point temperature is high, the feature of complicated component, severe corrosive.
At present, the treatment process of traditional aluminium melting, holding furnace smoke gas treatment mainly adopts following several mode:
1, the dust in low temperature sack cleaner (150 DEG C of heatproofs are following) smoke treatment in use.
2, with the dust in high temperature cloth bag dust collector (heatproof is more than 150 DEG C) smoke treatment.
3, the dust in deacidification (method of feeding lime powder, spray alkali lye before sack cleaner)+sack cleaner smoke treatment.
4, with the dust in dry electric precipitation device smoke treatment.
5, with the dust in wet type water film dedusting smoke treatment.
Although above-mentioned conventional process mode still, using, all exists some problems, cannot realize the long-term stability operation under smoke gas treatment system high treatment efficiency.
Low temperature sack cleaner in wherein using (150 DEG C of heatproofs are following), the middle hydrogenesis of flue gas, causes multiple sour gas to dissolve in and becomes mixed acid, and corrosivity is strong, is difficult to prevention, easily sticks with paste bag, and system is short service life.
With high temperature cloth bag dust collector (heatproof is more than 150 DEG C), system control requires high, control bad, easily burning bag or stick with paste bag, running resistance is large, soot cleaning system unmanageable, easily produces reentrainment of dust, high temperature cloth bag price is high, needs periodic replacement, operating cost is high.
Deacidification (method of feeding lime powder, spray alkali lye before sack cleaner)+sack cleaner, because temperature is too high, drystone ashes and sour gas are difficult to neutralization reaction occurs, and efficiency is low, and feeding lime amount is large, causes Dust Capacity to increase.
Use the method for spray alkali lye, spray amount is difficult to control, and in high-temperature flue gas, shower nozzle is short service life. Sack cleaner deashing need be used compressed air in addition, when the compressed air deashing of normal temperature, easily cause moment flue gas lower than flue gas dew point temperature dewfall, and produce and stick with paste bag and corrosion.
Use dry electric precipitation device, flue-gas temperature is too high, and dust is difficult to charged, and concentration of emission is difficult to guarantee, and particularly steel electrode is very easily corroded and efficiency of dust collection is reduced greatly. Use wet type water film dedusting, efficiency of dust collection is low, and concentration of emission is difficult to ensure, produces secondary wastewater.
Summary of the invention
In order to solve the problem in above-mentioned flue gas processing procedure, the object of the invention is to provide the wet-esp technique of a kind of smelting furnace for aluminium, the processing of holding furnace smoke comprehensive, and wet-esp is applied in processing procedure; Requirement in conjunction with wet electrical dust precipitator to import flue gas characteristic and operating mode institute smoke discharging characteristic, and adopt flue gas adjusting tower as pretreatment unit.
In conjunction with wet electrical dust precipitator purge mode and flue gas adjusting tower operation principle, appropriate design sewage-treatment plant by waste water recycling after treatment, and supporting sludge treatment equipment, guarantee system high efficiency stable operation, realizes zero-emission.
The technical solution adopted for the present invention to solve the technical problems is:
For the smelting furnace of aluminium, a wet-esp technique for holding furnace smoke comprehensive processing, specific as follows:
Whole technological process comprises pretreatment, advanced treating and discharge, and supporting sewage, sludge handling process.
Described pretreatment is treated smoke treatment by flue gas adjusting tower and is carried out humidification, cooling, neutralization and pre-dust removal process simultaneously.
Adopt flue gas adjusting tower, multi-layer high-voltage atomizer is set in tower, utilize high-pressure circulation pump that upper strata after treatment circulating water pool alkali lye is delivered to shower nozzle in tower, alkali lye after high-pressure atomization drips and sprays into from top to down in flue gas, and lean on moisture evaporation to absorb the heat of flue gas, flue-gas temperature is down to below 80 DEG C, increases dry flue gas humidity simultaneously.
Shower water is from circulating water pool, and its pH value, between 8-10, is alkalescence, and the sour gas in alkali and flue gas in shower water carries out neutralization reaction, can make smoke pH be adjusted between 5 ~ 6.
Drop after atomization is to the particle diameter in flue gas > dust of 20 μ m tackles removal, can make exhaust gas dust concentration be down to 150mg/m3To be issued to the effect of the pre-dedusting of flue gas.
Described advanced treating is to be delivered to and in wet electrical dust precipitator, to carry out advanced treating via air-introduced machine through pretreated flue gas, utilize the high voltage direct current of 50-100kv being just added to deduster, negative pole, wherein negative electrode is discharge electrode, anode is dust collector pole, corona ionization produces a large amount of electronics and cation, be suspended in that grit in smoke gas flow is subject to launching the effect of ion and charged, the attraction of electrode surface that charged grit is subject to opposed polarity is under the effect of electric field force and be attracted on dust collector pole, the grit being attracted on electrode surface is collected removal by water spray mode.
Exhaust gas dust concentration through pretreatment and advanced treating can be down to 10mg/m3Below, in sour gas and after up to standard through entering atmosphere by chimney.
Described sewage disposal is that whole technique is arranged containing sour dust-laden sewage and concentrated and enter circulating water pool, regularly carry out neutralization precipitation sewage is processed to adding alkali lye in pond, make maintenance meta-alkalescence in pond simultaneously, upper strata after treatment alkali lye is delivered to and in flue gas adjusting tower, is carried out reuse by high-pressure pump, lower floor's mud by sludge pumping to sludge treating system.
Described Treatment of Sludge is to utilize sludge pump that lower sediment mud in circulating water pool is delivered in sludge concentrating pot, and then the mud after concentrated is dewatered with screw extruder, guarantees the rear outward transport of moisture content < 30%.
Beneficial effect of the present invention is:
With respect to the processing mode of electric cleaner and sack cleaner, the present invention changes conventional processes, reelect wet-esp as main treating apparatus, there is system running resistance little (2000pa), without compressed air, the feature such as operating cost is low, stable, depickling efficiency of dust collection high (exit concentration < 10mg/m3), far below existing technique exit concentration; The present invention has the reasonable compactness of flow process, can effectively prevent the deep-etching of such flue gas.
Technique of the present invention arranges flue gas adjusting tower as pretreatment unit, utilization regularly adds alkali neutralization precipitation the sewage of wet electrical dust precipitator discharge is processed, and alkaline supernatant after treatment is passed through to high-pressure pump reuse to flue gas adjusting tower, in tower, utilize high speed atomizer that alkaline supernatant is sprayed in flue gas, when making flue gas cool-down, neutralize the sour gas such as HF and HCl in flue gas, utilize the problem that solves smoothly high-temperature flue gas depickling difficulty.
Process matching sewage of the present invention, sludge treating system, and rationally by reusing sewage after treatment, when guaranteeing the operation of wet electrical dust precipitator efficient stable, rationally solve secondary effluent problem, realize whole system sewage zero-discharge.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is further elaborated.
Fig. 1 is process chart of the present invention, and as shown in Figure 1, the present invention mainly comprises flue gas adjusting tower, wet-esp system, sewage disposal system, sludge treating system for the wet-esp system of aluminium melting furnace, the processing of holding furnace flue gas.
Wet-esp system comprises blower fan, wet electrical dust precipitator, high voltage source and control system, flushing water system and chimney.
Wet electrical dust precipitator and flue gas adjusting tower produce sewage, screw extruder effluent sewerage directly enters circulating water pool by pipeline, and the supernatant in circulating water pool after neutralization precipitation is delivered in flue gas adjusting tower by supernatant delivery pump.
Sewage disposal system comprises circulating water pool, alkali lye throwing device, pH monitoring, supernatant delivery pump.
Sludge treating system comprises sludge delivery pump, sludge concentrating pot, screw extruder. Wherein wet electrical dust precipitator and flue gas adjusting tower produce sewage, screw extruder effluent sewerage directly enters circulating water pool by pipeline, and the supernatant in circulating water pool after neutralization precipitation is delivered in flue gas adjusting tower by supernatant delivery pump.
The concrete handling process of smoke processing system of the present invention is as follows:
The high-temperature flue gas (up to 450 DEG C) that aluminium melting furnace, holding furnace are produced is delivered to and in flue gas adjusting tower, is carried out humidification, cooling, neutralization, dedusting in advance by flue (band insulation), flue gas is sent into by tower bottom, upper strata alkali lye in circulating water pool from top to bottom sprays in flue gas by high-pressure atomization nozzle, in adjusting tower, flue gas and the alkali lye after atomization drip and reversely fully mix, moisture evaporation absorbs flue gas heat reduces flue-gas temperature, HCl, SO in alkali and flue gas in drop2Deng acid ingredient generation neutralization reaction, particle diameter > dust of 20 μ m is removed after being adsorbed by droplet, and the flue-gas temperature after spray is down to below 80 DEG C simultaneously, to meet the requirement of wet electrical dust precipitator to input gas temperature.
Flue gas after cooling is delivered in wet electrical dust precipitator by blower fan, in wet electrical dust precipitator, apply high-tension electricity by DC high-voltage power supply (50 ~ 100kv) to corona discharge electrode, provide dust charged and for collecting dust required electric energy, low voltage control system comprises all the electricity consumption facilities beyond high voltage power supply device, it is a kind of multifunctional self-regulating system of rinsing deashing, insulator heating and safety interlocking control that comprises, mainly contain programme-control, operation demonstration and low-voltage distribution etc., guarantee the effective stable operation of deduster. The processes such as dusty gas is charged through corona discharge, gas ionization, particle under the effect of high voltage electric field, particle deposition, deashing are carried out degree of depth depickling, dedusting. The dust being collected on collecting plate is removed by flushing water, flushing water system is made up of water pump, water tank, pipe network, valve and nozzle, point corona discharge electrode is interrupted independently water spray unit of two of water spray and collecting plate continuous water sprays, and the flow of water spray, cycle are by control system control. Clean flue gas after treatment (concentration < 10mg/m3) enters in atmospheric environment through chimney.
Because adopting, wet electrical dust precipitator rinses deashing, the sewage disposal of this process matching and sludge treating system, and whole process equipment sewage effluent directly enters circulating water pool by pipeline, regularly carries out neutralization precipitation by alkali lye throwing device to adding alkali lye in circulating water pool; Alkali lye throwing device forms by adding tank, measuring pump, valve, pipeline, and mixer and pH value on-line monitoring instrument are set in circulating water pool, makes its pH value remain on 8 ~ 10, according to the variation control alkali lye dosage of pH value in circulating water pool. Supernatant after neutralization precipitation sprays by high-pressure pump reuse to flue gas adjusting tower, lower floor's mud is in sludge pump enters sludge concentrating pot, recycling screw extruder carries out sludge dewatering, make moisture percentage in sewage sludge be less than 30% rear outward transport, the sewage that screw extruder is discharged directly enters circulating water pool by pipeline.
Claims (10)
1. for the smelting furnace of aluminium, a wet-esp technique for holding furnace smoke comprehensive processing, it is characterized in that, comprise the steps:
Pretreatment: treat smoke treatment by flue gas adjusting tower and carry out humidification, cooling, neutralization and pre-dust removal process;
Advanced treating: be delivered in wet electrical dust precipitator via air-introduced machine through pretreated flue gas, utilization is added to the high voltage direct current of the positive and negative electrode of deduster, corona ionization produces a large amount of electronics and cation, make to be suspended in the dust particles in smoke gas flow and under the effect of electric field force, be adsorbed on the dust collector pole of deduster, and removing by water spray mode;
Discharge: by above-mentioned two step flue gas after treatment, through detection up to standard after through directly entering atmosphere by chimney.
2. the wet-esp technique of a kind of smelting furnace for aluminium according to claim 1, the processing of holding furnace smoke comprehensive, it is characterized in that: the humidification in described preprocessing process, cooling, neutralization are to utilize circulating pump that the upper strata alkali lye of circulating water pool is delivered in flue gas adjusting tower, through multiple layer high speed atomizer spray flue gas, and evaporate the heat that absorbs flue gas by moisture.
3. the wet-esp technique of a kind of smelting furnace for aluminium according to claim 2, the processing of holding furnace smoke comprehensive, it is characterized in that: be down to below 80 DEG C through pretreated flue-gas temperature, shower water has carried out adding wet process to import dry flue gas simultaneously.
4. the wet-esp technique of a kind of smelting furnace for aluminium according to claim 2, the processing of holding furnace smoke comprehensive, it is characterized in that: atomizer shower water used is from circulating water pool, its pH value is between 8-10, sour gas in alkaline water and flue gas in shower water carries out neutralization reaction, and smoke pH is adjusted between 5 ~ 6.
5. the wet-esp technique of a kind of smelting furnace for aluminium according to claim 1, the processing of holding furnace smoke comprehensive, its feature exists: when the pre-dust removal process in described pre-treatment step is drop after the atomization of flue gas adjusting tower inner high voltage spray flue gas to the particle diameter in flue gas > dust of 20 μ m tackles removal, makes exhaust gas dust concentration be down to 150mg/m3Below.
6. the wet-esp technique of a kind of smelting furnace for aluminium according to claim 1, the processing of holding furnace smoke comprehensive, its feature exists: described advanced treating is using vertical tube rotating vane type electric cleaner as main treating apparatus, the port of export arranges chimney, supporting sewage, the sludge treating system of arranging.
7. the wet-esp technique of a kind of smelting furnace for aluminium according to claim 6, the processing of holding furnace smoke comprehensive, its feature exists: described sewage disposal is that institute's sewage effluent in whole process system is concentrated in circulating water pool, regularly adding alkali lye carries out neutralization precipitation and keeps meta-alkalescence, upper strata after treatment alkali lye reuse is to flue gas adjusting tower, and lower floor's mud enters sludge treating system.
8. the wet-esp technique of a kind of smelting furnace for aluminium according to claim 6, the processing of holding furnace smoke comprehensive, its feature exists: described Treatment of Sludge be by circulating water pool lower sediment mud in sludge pump is delivered to sludge concentrating pot, and then utilize screw extruder to dewater, make the rear outward transport of moisture content < 30%.
9. the wet-esp technique of a kind of smelting furnace for aluminium according to claim 1, the processing of holding furnace smoke comprehensive, its feature exists: the exhaust gas dust concentration after advanced treating is down to below 10mg/m3.
10. the wet-esp technique of a kind of smelting furnace for aluminium according to claim 1, the processing of holding furnace smoke comprehensive, its feature exists: the high voltage direct current that uses is 50-100kv.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510972760.3A CN105588450A (en) | 2015-12-23 | 2015-12-23 | Wet electric precipitation technique for comprehensive treatment of smoke of smelting furnace and heat preserving furnace for aluminum |
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| CN201510972760.3A CN105588450A (en) | 2015-12-23 | 2015-12-23 | Wet electric precipitation technique for comprehensive treatment of smoke of smelting furnace and heat preserving furnace for aluminum |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106474851A (en) * | 2016-08-20 | 2017-03-08 | 苏州舒跃碳吸附剂有限公司 | A kind of coal-burning utilities cleaner |
| CN109621613A (en) * | 2019-01-11 | 2019-04-16 | 山东名邦环保科技有限公司 | A kind of dry tail gas minimum discharge method of wood-based plate |
| CN109647109A (en) * | 2019-01-11 | 2019-04-19 | 山东名邦环保科技有限公司 | A kind of dry tail gas minimum discharge equipment of wood-based plate |
| CN110052106A (en) * | 2019-05-15 | 2019-07-26 | 开平市新龙回收加工厂有限公司 | Cupric industrial sludge comprehensive administration of three wastes system and method |
| CN111804438A (en) * | 2020-06-30 | 2020-10-23 | 南通江山农药化工股份有限公司 | Wet-type electric dust removal device for waste gas treatment and use method thereof |
| CN117258442A (en) * | 2023-11-23 | 2023-12-22 | 湖南洁滤环保科技有限公司 | A prevent sticking with paste bag control system for sack cleaner |
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| KR20110045691A (en) * | 2009-10-27 | 2011-05-04 | 김철미 | The Noxious gas cleaning system |
| CN103276141A (en) * | 2013-06-07 | 2013-09-04 | 中冶赛迪工程技术股份有限公司 | Converter primary flue gas wet type classification dust removing apparatus |
| CN104056723A (en) * | 2014-06-06 | 2014-09-24 | 浙江南源环境工程技术有限公司 | Recirculating water treatment system for ash removal spraying water of wet electrostatic dust collector |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106474851A (en) * | 2016-08-20 | 2017-03-08 | 苏州舒跃碳吸附剂有限公司 | A kind of coal-burning utilities cleaner |
| CN109621613A (en) * | 2019-01-11 | 2019-04-16 | 山东名邦环保科技有限公司 | A kind of dry tail gas minimum discharge method of wood-based plate |
| CN109647109A (en) * | 2019-01-11 | 2019-04-19 | 山东名邦环保科技有限公司 | A kind of dry tail gas minimum discharge equipment of wood-based plate |
| CN110052106A (en) * | 2019-05-15 | 2019-07-26 | 开平市新龙回收加工厂有限公司 | Cupric industrial sludge comprehensive administration of three wastes system and method |
| CN110052106B (en) * | 2019-05-15 | 2024-04-19 | 开平市新龙回收加工厂有限公司 | Comprehensive treatment system and method for three wastes of copper-containing industrial sludge |
| CN111804438A (en) * | 2020-06-30 | 2020-10-23 | 南通江山农药化工股份有限公司 | Wet-type electric dust removal device for waste gas treatment and use method thereof |
| CN117258442A (en) * | 2023-11-23 | 2023-12-22 | 湖南洁滤环保科技有限公司 | A prevent sticking with paste bag control system for sack cleaner |
| CN117258442B (en) * | 2023-11-23 | 2024-02-02 | 湖南洁滤环保科技有限公司 | A prevent sticking with paste bag control system for sack cleaner |
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