CN104138711A - Ceramic kiln flue gas semidry-method and dry-method defluorination technological method - Google Patents
Ceramic kiln flue gas semidry-method and dry-method defluorination technological method Download PDFInfo
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- CN104138711A CN104138711A CN201410339355.3A CN201410339355A CN104138711A CN 104138711 A CN104138711 A CN 104138711A CN 201410339355 A CN201410339355 A CN 201410339355A CN 104138711 A CN104138711 A CN 104138711A
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Abstract
The invention relates to a ceramic kiln flue gas semidry-method and dry-method defluorination technological method. According to the technological method, the semidry-method process based on a fixed spraying reaction tower and the dry-method process based on a bag-type dust collector cooperate to handle fluoride in ceramic kiln flue gas. The technological method has the advantages that efficiency is high, the environment is protected, handling capacity is large, the operating cost is low, and operation and maintenance are convenient, and therefore the technological method has high application value in handling of the fluoride in the ceramic kiln flue gas.
Description
Technical field
The invention belongs to environmental protection technical field, particularly a kind of semidry method-dry method defluorinating process method of ceramic kiln flue gas.
Background technology
According to GB 25464-2010 " ceramic industry pollutant emission standard " requirement, the newly-built enterprise of ceramic industry from 1 day October in 2010, existing enterprise from 1 day January in 2012, all need to carry out more strict Air Pollutant Emission concentration limit.Specific standards is as shown in table 1.
the newly-built enterprise of table 1 Air Pollutant Emission concentration limit
Unit: mg/m
3
As shown in Table 1, in ceramic kiln flue gas, the concentration of emission limit value of fluoride is 3.0mg/m
3, require very strict.At present, to treatment process and the method for fluoride in ceramic kiln flue gas, the general Wet-type spray treatment technology that adopts, weak solution by absorbent sprays in flue gas, fluorine in flue gas reacts with absorbent solution and removes, its shortcoming is: fluorine removing rate is low, even if stable operation is also difficult to reach the requirement of aforementioned national standard.By current defluorinating process and method, fluoride concentration of emission can be stablized and is controlled at 4.0mg/m
3left and right, with actual concentrations limit value 1.0mg/m in GB 25464-2010 " ceramic industry pollutant emission standard "
3(normal concentration limit value is 3.0mg/m
3, by the conversion of benchmark excess air coefficient, actual concentrations limit value is 1.0mg/m
3) require to differ greatly; In addition, equipment operation maintenance complexity, processing cost is high, larger to equipment and personnel's corrosivity in processing procedure, and the sewage, the mud handling capacity that after processing, produce are large.Chinese patent CN103316581A discloses a kind of hydrogen fluoride flue-gas purification equipment and processing method, its treating apparatus is dry adsorption filter plant, although avoided discharge fluoride waste, but its processing method adopts the limestone solid defluorination reaction adsorbent defluorination that granularity is 4 ~ 8mm, cause the contact area of adsorption reaction less, flue gas treating capacity is little.When exhaust gas volumn is large, to reach higher treatment effeciency, must strengthen Cell processor structure or increase Cell processor number, thereby causing its complex structure, complex operation.
In prior art, sack cleaner is mainly used to remove the particle in flue gas.Applicant of the present invention finds by a large amount of research, excessive absorbent is attached on filter bag of dust collector surface, fluoride in flue gas is continued and filter bag of dust collector surface filter cake in excessive absorbent granules react, can make fluorine removing rate further improve, obtained beyond thought effect.
Because evaporate, outlet flue gas carries etc. discharged moisture outside system, can a part of water of loss in the fixing spray reaction Tower System of semidry method.For keeping the normal operation of reaction tower, must adding technology water to compensate above-mentioned loss.What need supply fresh water (FW) is water injection system and the absorbent emulsion preparation system of the fixing spraying reaction tower of semidry method of operation continuously.Fresh water (FW) system is made up of technique water tank, technique water pump and relevant connection pipeline etc.
Compressed air system is mainly equipment compressed air is provided, mainly for compressed air blowback system of absorbent spraying system, water injection system and sack cleaner etc.
Beneficial effect of the present invention is as follows:
1, the defluorinating process of ceramic kiln flue gas of the present invention and method are semidry method-dry method associated treatment technique, and flue gas is without pre-cooled, and flue gas treating capacity is large, and flow process is relatively simple, convenient operation management; The present invention adopts structurized treatment process and method, and equipment is simple, compact, is convenient to manufacture, installation, maintenance and expansion; Systematic running cost is low, energy consumption is low, easy care;
2, absorbent lime hydrate emulsion utilization rate is high, removal efficiency to fluoride is high, can reach more than 99.9%, stable operation can reach the middle actual concentrations limit value 1.0mg/m3 of GB 25464-2010 " ceramic industry pollutant emission standard ", and (normal concentration limit value is 3.0mg/m3, press the conversion of benchmark excess air coefficient, actual concentrations limit value is 1.0mg/m3) requirement;
3, in the process of the further defluorination in sack cleaner surface, the particle in flue gas is adsorbed by sack cleaner, and particle concentration also can reach the concentration limit requirement in GB 25464-2010 " ceramic industry pollutant emission standard ";
4, hot flue gas moves in the treating apparatus of additional heat-insulation layer, and in processing procedure, thermal loss is little, reaches energy-conserving and environment-protective effect;
5, in flue gas processing procedure, do not discharge fluoride waste, avoided secondary pollution; Discarded object amount after treatment is little, easily processes.
In a word, technical scheme of the present invention has advantages of efficiently, environmental protection, treating capacity is large, operating cost is low, convenient operating maintenance, in ceramic kiln flue gas, aspect the processing of fluoride, is with a wide range of applications.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of efficient, environmental protection, ceramic kiln flue gas semidry method-dry method defluorinating process method that treating capacity is large for the deficiencies in the prior art.
Technical problem to be solved by this invention is achieved by the following technical solution:
Ceramic kiln flue gas semidry method-dry method defluorinating process method of the present invention adopt to fix spraying reaction tower be basic semidry process and taking sack cleaner the fluoride in basic dry process associated treatment ceramic kiln flue gas.
Ceramic kiln flue gas semidry method-dry method defluorinating process method of the present invention is mainly made up of following system: fixing spray reaction Tower System and sack cleaner system, then coordinate the accessory systems such as absorbent emulsion preparation system, fresh water (FW) system and compressed air system.
Ceramic kiln flue gas semidry method-dry method defluorinating process method of the present invention comprises the steps:
(1) semidry method defluorinating process: semidry method defluorinating process is mainly to fix spray reaction Tower System as basis.Fixing spray reaction Tower System mainly comprises fixing spraying reaction tower, absorbent spraying system and water injection system and relevant connection flue, wherein fixes spray reaction inner wall of tower and is provided with some deflectors.Ceramic kiln outlet flue gas is by horizontal flue through tangentially entering fixing spray reaction tower bottom, and reaction tower bottom is provided with Venturi, smoke gas flow through time accelerated.Absorbent sprays into reaction tower by absorbent spraying system through reaction tower bottom absorbent nozzle and middle part absorbent nozzle.Mixing at acidic materials such as the absorbent of reaction tower bottom absorbent nozzle place's atomization and fluorides in flue gas, there is neutralization reaction in solution-air contact, and the moisture in absorbent emulsion droplet is evaporated, and flue gas obtains cooling simultaneously.Outlet at Venturi is provided with water injection system, and the atomized water spraying into makes flue gas further be down to 100 DEG C of left and right, and flue gas at a high speed makes the further atomization of water.The flue gas of humidification rises in reaction tower spiral, under the abundant stirring rotary-cut effect of the deflector of arranging through regional, form an abundant range of atomization with the absorbent spraying into from reaction tower middle part absorbent nozzle large area, in range of atomization flue gas and the abundant mixing and contacting reaction of absorbent.Due to the appropriate design of deflector, flue gas produces air swirl in tower, powerful upper spin and impulsive force are stirred absorbent is fierce, obtain best stirring and atomizing effect, thousands of times of the long-pending increases of absorbent surface of unit volume, absorbent and the fluoride of atomization fully stir, and reach optimal contact area and mode, absorb and dissolve and fully reaction.Under low-temperature condition, absorbent more easily reacts with the fluoride in flue gas, generates calcirm-fluoride etc.The oarse-grained solid of part that reaction generates can fall into reaction tower cone, is arranged outward by reaction tower cone base rotation flapper.Flue gas with a large amount of solid particles is discharged from the flue on reaction tower top, then enters sack cleaner.
The absorbent adopting in the present invention is the lime hydrate emulsion that powdery calcium hydroxide is made by absorbent emulsion preparation system.After spraying from the weak solution of absorbent in Wet-type spray treatment technology, be still that solution state is different, the lime hydrate emulsion concentration in the present invention is high, after atomization, can form the solid granulates of certain moisture content, therefore be called semidry method defluorinating process.Absorbent emulsion preparation system comprises absorbent emulsion preparation tank and corresponding agitator, absorbent emulsion hold-up tank and corresponding agitator, absorbent emulsion pumps and is connected the pipeline etc. of each equipment.In the absorbent emulsion preparation system that the present invention arranges, the above purity of calcium hydroxide powder 90% using, the above fineness of 200 order, in preparation tank, adding suitable quantity of water, to be mixed with mass fraction be 5% ~ 35% lime hydrate emulsion, the mass fraction of preferred lime hydrate emulsion is 30%.Delivered in the absorbent spraying system of fixing spraying reaction tower by absorbent emulsion pumps through the lime hydrate emulsion stirring.
The principles of chemistry of semidry process be fluoride in flue gas etc. in the situation that moisture exists, the liquid phase surface of Ca in lime hydrate emulsion (OH) 2 particles reacts.Following reaction equation has been described the defluorination reaction occurring in fixing spraying reaction tower within the scope of 80 ~ 100 DEG C.
Ca(OH)2+2HF=CaF2+2H2O
The present invention is according to the feeding coal of absorbent in the Flow-rate adjustment absorbent spraying system of fixing spraying reaction tower import flue gas, to ensure to meet the requirements of fluorine removing rate.
The present invention directly controls the injection flow rate of fixing spraying reaction tower bottom water spraying system according to the flue-gas temperature in fixing spraying reaction tower exit, to guarantee that temperature in reaction tower is in approaching as much as possible within the scope of the optimal reaction temperature of dew point, can make flue-gas temperature be controlled within the scope of 80 ~ 100 DEG C, make equipment and flue be unlikely to produce cold end corrosion, this is also that fixing spraying reaction tower does not need corrosion-resistant reason place.Water injection system nozzle of the present invention adopts to reflux and regulates nozzle, and injection flow rate is by regulating backflow hydraulic pressure to regulate.
It is independent mutually that the present invention above-mentioned two overlaps control systems, do not produce and influence each other, and when this ensures that fixing spraying reaction tower can change in load 40% ~ 100% scope, obtains stable fluorine removing rate.
(2) dry method defluorinating process: second important step of semidry method-dry method defluorinating process method of the present invention is exactly for further defluorination and filters the fly ash granule in flue gas, the sack cleaner of accessory substance.
Sack cleaner is long-bag low-pressure pulse structure, adopts pulse bag type dust collector.Deduster is made up of parts such as upper box, middle housing, import and export flue, ash bucket, compressed air blowback system, filter bag and bag cages.Wherein upper box orifice plate adopts the method processing of laser cutting to ensure precision, imports and exports flue and is furnished with smoke entrance valve, and compressed air blowback system is furnished with blowing valve.
Enter sack cleaner from the flue gas with flying dust and various dust of fixing spraying reaction tower.In sack cleaner, flue gas enters from filter bag outside, discharge from the exhaust pass at compartment top, various particles, absorbent and product, heavy metal of condensing etc. are all attached to filter bag surface, form one deck filter cake, excessive absorbent granules reaction in fluoride continuation in flue gas and filter bag of dust collector surface filter cake, further improves fluorine removing rate.Various particles (comprising the flue dust in flue gas, the heavy metal condensing, reaction product) are attached to sack cleaner filter bag outer surface, and compressed air blowback enters sack cleaner ash bucket.Ash bucket is provided with electric heater unit, can prevent that the flying dust moisture absorption from causing bonding or obstruction and sour dewing corrosion.Leaking ash arranges outward through electric lock pneumatic device.Flue gas after purification enters chimney by air-introduced machine, and in flue gas, fluoride concentration is pressed after benchmark excess air coefficient conversion lower than 1.0mg/m3, particle concentration press benchmark excess air coefficient and convert after lower than 10.0mg/m3.
The deashing of sack cleaner is pulse backblowing mode.Sack cleaner is designed to online and off-line ash-clearing, and can off-line maintenance.In the time running well, deashing carried out according to pressure drop and the time imported and exported, and PLC system is controlled automatically.In the time that Automatic clearance cannot meet the demands, also can adopt off-line cleaning.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Fig. 1 is process chart of the present invention.As shown in Figure 1, ceramic kiln flue gas semidry method-dry method defluorinating process method of the present invention comprises the steps:
(1) semidry method defluorinating process: semidry method defluorinating process is mainly to fix spray reaction Tower System 1 as basis.Fixing spray reaction Tower System 1 mainly comprises fixing spraying reaction tower 2, absorbent spraying system 3 and water injection system 4 and relevant connection flue 5,6.Ceramic kiln outlet flue gas is by horizontal flue 5 through tangentially entering fixing spraying reaction tower 2 bottoms, and reaction tower bottom is provided with Venturi 7, smoke gas flow through time accelerated.Absorbent sprays into reaction tower by absorbent spraying system 3 through reaction tower bottom absorbent nozzle 3.1 and middle part absorbent nozzle 3.2.Mixing at acidic materials such as the absorbent of reaction tower bottom absorbent nozzle 3.1 places atomization and fluorides in flue gas, there is neutralization reaction in solution-air contact, and the moisture in absorbent emulsion droplet is evaporated, and flue gas obtains cooling simultaneously.Be provided with water injection system 4 in the outlet of Venturi 7, the atomized water spraying into makes flue gas further be down to 100 DEG C of left and right, and flue gas at a high speed makes the further atomization of water.The flue gas of humidification rises in reaction tower spiral, under the abundant stirring rotary-cut effect of the deflector 8 of arranging through regional, form an abundant range of atomization with the absorbent spraying into from reaction tower middle part absorbent nozzle 3.2 large area, in range of atomization flue gas and the abundant mixing and contacting reaction of absorbent.Due to the appropriate design of deflector 8, flue gas produces air swirl in tower, powerful upper spin and impulsive force are stirred absorbent is fierce, obtain best stirring and atomizing effect, thousands of times of the long-pending increases of absorbent surface of unit volume, absorbent and the fluoride of atomization fully stir, and reach optimal contact area and mode, absorb and dissolve and fully reaction.Under low-temperature condition, absorbent more easily reacts with the fluoride in flue gas, generates calcirm-fluoride etc.The oarse-grained solid of part that reaction generates can fall into reaction tower cone 9, by the outer row of reaction tower cone 9 bottom rotation flapper 10.Flue gas with a large amount of solid particles is discharged from the flue 6 on reaction tower top, then enters sack cleaner 11.
The absorbent adopting in the present invention is the lime hydrate emulsion that powdery calcium hydroxide is made by absorbent emulsion preparation system 12.Absorbent emulsion preparation system 12 comprises absorbent emulsion preparation tank 13 and corresponding agitator 13.1, absorbent emulsion hold-up tank 14 and corresponding agitator 14.1, absorbent emulsion pumps 15 and is connected the pipeline 16.1,16.2 etc. of each equipment.In the absorbent emulsion preparation system 12 that the present invention arranges, the above purity of calcium hydroxide powder 90% of use, the above fineness of 200 order, in preparation tank 13, adding suitable quantity of water, to be mixed with mass fraction be 30% lime hydrate emulsion.Delivered in the absorbent spraying system 3 of fixing spraying reaction tower 2 by absorbent emulsion pumps 15 through the lime hydrate emulsion stirring.
The principles of chemistry of semidry process be fluoride in flue gas etc. in the situation that moisture exists, react on the liquid phase surface of calcium hydroxide Ca (OH) 2 particles.Following reaction equation has been described the defluorination reaction of fixing spraying reaction tower 2 interior generations within the scope of 80 ~ 100 DEG C.
Ca(OH)2+2HF=CaF2+2H2O
The present invention is according to the feeding coal of absorbent in the Flow-rate adjustment absorbent spraying system 3 of fixing spraying reaction tower 2 import 5.1 flue gases, to ensure to meet the requirements of fluorine removing rate.
The flue-gas temperature that the present invention exports 6.1 places according to fixing spraying reaction tower 2 is directly controlled the injection flow rate of fixing spraying reaction tower 2 bottom water spraying systems 4, to guarantee that temperature in reaction tower is in approaching as much as possible within the scope of the optimal reaction temperature of dew point, can make flue-gas temperature be controlled within the scope of 80 ~ 100 DEG C, make equipment and flue be unlikely to produce cold end corrosion, this is also that fixing spraying reaction tower 2 does not need corrosion-resistant reason place.Water injection system 4 nozzles of the present invention adopt to reflux and regulate nozzle, and injection flow rate is by regulating backflow hydraulic pressure to regulate.
It is independent mutually that the present invention above-mentioned two overlaps control systems, do not produce and influence each other, and when this ensures that fixing spraying reaction tower 2 can change in load 40% ~ 100% scope, obtains stable fluorine removing rate.
(2) dry method defluorinating process: second important step of semidry method-dry method defluorinating process method of the present invention is exactly for further defluorination and filters the fly ash granule in flue gas, the sack cleaner 11 of accessory substance.
Sack cleaner 11 is long-bag low-pressure pulse structure, adopts pulse bag type dust collector.Deduster 11 is made up of parts such as upper box 17, middle housing 18, import and export flue 6 and 19, ash bucket 20, compressed air blowback system 21, filter bag 22 and bag cages 23.Wherein upper box 17 orifice plates adopt the method processing of laser cutting to ensure precision, import and export flue and are furnished with smoke entrance valve 6.2 and 19.1, and compressed air blowback system is furnished with blowing valve 21.1.
Enter sack cleaner 11 from the flue gas with flying dust and various dust of fixing spraying reaction tower 2.In sack cleaner 11, flue gas enters from filter bag 22 outsides, discharge from the exhaust pass 19 at compartment top, various particles, absorbent and product, heavy metal of condensing etc. are all attached to filter bag 22 surfaces, form one deck filter cake, in fluoride continuation in flue gas and the surperficial filter cake of filter bag of dust collector 22, excessive absorbent granules reacts, and fluorine removing rate is further improved.Various particles (comprising the flue dust in flue gas, the heavy metal condensing, reaction product) are attached to sack cleaner filter bag 22 outer surfaces, and compressed air blowback enters sack cleaner ash bucket 20.Ash bucket 20 is provided with electric heater unit, can prevent that the flying dust moisture absorption from causing bonding or obstruction and sour dewing corrosion.Leak ash through the outer row of electric lock pneumatic device 24.Flue gas after purification enters chimney 26 by air-introduced machine 25, and in flue gas, fluoride concentration is pressed after benchmark excess air coefficient conversion lower than 1.0mg/m3, particle concentration press benchmark excess air coefficient and convert after lower than 10.0mg/m3.
The deashing of sack cleaner 11 is pulse backblowing mode.Sack cleaner is designed to online and off-line ash-clearing, and can off-line maintenance.In the time running well, deashing carried out according to pressure drop and the time imported and exported, and PLC system is controlled automatically.In the time that Automatic clearance cannot meet the demands, also can adopt off-line cleaning.
Because evaporate, outlet flue gas carries etc. discharged moisture outside system, can a part of water of loss in the fixing spray reaction Tower System 2 of semidry method.For keeping the normal operation of reaction tower, must adding technology water to compensate above-mentioned loss.What need supply fresh water (FW) is water injection system 4 and the absorbent emulsion preparation system 12 of the fixing spraying reaction tower 2 of semidry method of operation continuously.Fresh water (FW) system 27 is made up of technique water tank 28, technique water pump 29 and relevant connection pipeline 30 etc.
Compressed air system 21 and 31 is mainly equipment provides compressed air, mainly for compressed air blowback system 21 of absorbent spraying system 3, water injection system 4 and sack cleaner 11 etc.
Although embodiment has been described in detail the present invention, those of ordinary skill in the art should be appreciated that still and can modify and be equal to replacement technical scheme of the present invention, within it all should be encompassed in claim scope of the present invention.
Claims (7)
1. ceramic kiln flue gas semidry method-dry method defluorinating process method, comprises fixing spray reaction Tower System, sack cleaner system and accessory system; Described accessory system comprises absorbent emulsion preparation system, fresh water (FW) system and compressed air system; It is characterized in that, adopt taking fix spraying reaction tower as basic semidry process and taking sack cleaner the fluoride in basic dry process associated treatment ceramic kiln flue gas.
2. ceramic kiln flue gas semidry method-dry method defluorinating process method according to claim 1, it is characterized in that, described fixing spray reaction Tower System mainly comprises fixing spraying reaction tower, absorbent spraying system and water injection system and relevant connection flue, wherein fixes spray reaction inner wall of tower and is provided with some deflectors; Described semidry process comprises following steps:
A) ceramic kiln outlet flue gas is by horizontal flue through tangentially entering fixing spray reaction tower bottom, and reaction tower bottom is provided with Venturi, and smoke gas flow is accelerated in the time of this device;
B) absorbent sprays into reaction tower through reaction tower bottom absorbent nozzle and middle part absorbent nozzle; The acidic materials hybrid reactions such as the fluoride in absorbent and the flue gas of the absorbent nozzle place's atomization of reaction tower bottom, the moisture in absorbent emulsion droplet is evaporated, and flue gas obtains cooling simultaneously; The outlet of Venturi is provided with water injection system, and the atomized water spraying into makes flue gas further be down to 100 DEG C of left and right, and flue gas at a high speed makes the further atomization of water; The flue gas of humidification rises in reaction tower spiral, under the process abundant stirring rotary-cut effect of described deflector, form an abundant range of atomization with the absorbent spraying into from reaction tower middle part absorbent nozzle large area, in range of atomization flue gas and the abundant mixing and contacting reaction of absorbent;
C) solid particle that reaction generates falls into reaction tower cone, is arranged outward by reaction tower cone base rotation flapper.
3. ceramic kiln flue gas semidry method-dry method defluorinating process method according to claim 1 and 2, is characterized in that, described absorbent is the lime hydrate emulsion that powdery calcium hydroxide is made by absorbent emulsion preparation system; In described absorbent emulsion preparation system, the calcium hydroxide powder purity of use is more than 90%, and more than fineness 200 orders, in preparation tank, adding water and being mixed with mass fraction is 5% ~ 35% lime hydrate emulsion.
4. ceramic kiln flue gas semidry method-dry method defluorinating process method according to claim 3, is characterized in that, described lime hydrate emulsion mass fraction is 30%.
5. ceramic kiln flue gas semidry method-dry method defluorinating process method according to claim 2, it is characterized in that, directly control the injection flow rate of fixing spraying reaction tower bottom water spraying system according to the flue-gas temperature in fixing spraying reaction tower exit, to guarantee that temperature in reaction tower is in approaching as much as possible within the scope of the optimal reaction temperature of dew point, can make flue-gas temperature be controlled within the scope of 80 ~ 100 DEG C, make equipment and flue be unlikely to produce cold end corrosion.
6. ceramic kiln flue gas semidry method-dry method defluorinating process method according to claim 1 and 2, is characterized in that, described dry process is used for further defluorination and filter fly ash granule, the accessory substance in flue gas; Described dry process is:
Flue gas through described semidry process processing is introduced to sack cleaner, in sack cleaner, flue gas enters from filter bag outside, discharge from the exhaust pass at compartment top, various particles, absorbent and product, heavy metal of condensing etc. are all attached to filter bag surface, form one deck filter cake, excessive absorbent granules reaction in the fluoride continuation in flue gas and filter bag of dust collector surface filter cake, further improves fluorine removing rate; Various particles (comprising the flue dust in flue gas, the heavy metal condensing, reaction product) are attached to sack cleaner filter bag outer surface, and compressed air blowback enters sack cleaner ash bucket; Leaking ash arranges outward through electric lock pneumatic device; Flue gas after purification enters chimney by air-introduced machine.
7. ceramic kiln flue gas semidry method-dry method defluorinating process method according to claim 6, is characterized in that, the deashing of described sack cleaner is pulse backblowing mode; Sack cleaner is designed to online and off-line ash-clearing, and can off-line maintenance; In the time running well, deashing carried out according to pressure drop and the time imported and exported, and PLC system is controlled automatically; In the time that Automatic clearance cannot meet the demands, also can adopt off-line cleaning.
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| CN107008089A (en) * | 2017-04-08 | 2017-08-04 | 安徽盛运重工机械有限责任公司 | A kind of tail cigarette processing compound type dust remover |
| CN111452217A (en) * | 2020-04-08 | 2020-07-28 | 吴圣丁 | Fly ash treatment device suitable for waste incineration power plant |
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