CN108786409A - A kind of high temperature desulfurizing denitration flue gas dust collecting system - Google Patents

A kind of high temperature desulfurizing denitration flue gas dust collecting system Download PDF

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Publication number
CN108786409A
CN108786409A CN201810938549.3A CN201810938549A CN108786409A CN 108786409 A CN108786409 A CN 108786409A CN 201810938549 A CN201810938549 A CN 201810938549A CN 108786409 A CN108786409 A CN 108786409A
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China
Prior art keywords
white lime
denitration
outlet
flue gas
catalyst filter
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CN201810938549.3A
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Chinese (zh)
Inventor
刘科
李金虎
谷化强
汤红运
李华东
吴飞
张立凯
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China Triumph International Engineering Co Ltd
Shenzhen Triumph Technology Engineering Co Ltd
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China Triumph International Engineering Co Ltd
Shenzhen Triumph Technology Engineering Co Ltd
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Priority to CN201810938549.3A priority Critical patent/CN108786409A/en
Publication of CN108786409A publication Critical patent/CN108786409A/en
Withdrawn legal-status Critical Current

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    • 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
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • 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
    • B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/508—Sulfur oxides by treating the gases with solids
    • 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
    • B01D53/75—Multi-step processes
    • 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
    • B01D53/81—Solid phase processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

The present invention discloses a kind of high temperature desulfurizing denitration flue gas dust collecting system, portion, desulfurization subsidence part, catalyst filter house, denitration portion, ammonia supply department, white lime circulation portions and by-product collection portion are transported including lime storage, each part, which cooperates, constitutes organic whole, and flue gas of glass melting furnace administers SO2Control use dry desulfurizing tower and white lime recycle utilization, in high circulation ratio and Ca/S lower, make SO2Emission compliance completes desulfurization process in conjunction with catalyst filter collector in high temperature section；Meanwhile the by-product after desulfurization enters catalyst filter collector and is dusted, and reduces the particle concentration of flue gas, protects rear end SCR denitration reactor；The control of nitrogen oxides uses SCR denitration reactor, protects catalyst, meanwhile, denitration reaction has no the generation of particulate matter, will not increase the particle concentration of flue gas emission.

Description

A kind of high temperature desulfurizing denitration flue gas dust collecting system
Technical field
The present invention relates to Flat Glass Furnace smoke gas treatment field, specifically a kind of high temperature desulfurizing denitration flue gas ash removal system System.
Background technology
The improvement of the nitrogen oxides of glass industry is usually that SCR denitration reactor is arranged after hot electrostatic precipitator at present, Meanwhile the technological process of desulfurization is to use semidry method or Wet Flue Gas Desulfurization Technique after waste heat boiler cools down.Technological process is complicated, takes up an area Area is big, difficult management.
Preliminary Applications have the characteristics that high temperature resistant is resistant to chemical etching, high dust collection efficiency in market for ceramic filter dedusting, Domestic at present and external existing finished product listing.Ceramic filter dedusting is divided into appendix catalyst and not two kinds of forms of appendix catalyst.Its In, the ceramic filter dedusting of appendix catalyst is provided simultaneously with the function of denitration, and application market is more extensive.It is attached due to being limited by catalyst The limitation of load technology, price is far above no catalyst ceramic filter unit.
Invention content
The purpose of the present invention is to provide a kind of high temperature desulfurizing denitration flue gas dust collecting system, which can overcome biography Unite desulfurizing and denitrifying process long flow path, complex management defect, the advantages of using ceramic filter dedusting high temperature resistant and high dust collection efficiency, Simplification of flowsheet improves efficiency.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of high temperature desulfurizing denitration flue gas dust collecting system, including：
A, lime storage transports portion,
The lime storage portion of transporting includes white lime storage warehouse, and the first deduster is equipped at the top of white lime storage warehouse；White lime stores Orlop portion is equipped with the first rotary valve, and the weighing cabin being sequentially communicated, screw conveyor, the are from top to bottom equipped with below the first rotary valve Two rotary valves and gas-solid mixing storehouse；The entrance in gas-solid mixing storehouse is separately connected the outlet of conveying fan and the second rotary valve；
B, desulfurization subsidence part,
Desulfurization subsidence part includes dry desulfurizing tower and expansion chamber, is equipped with venturi accelerator in dry desulfurizing tower, and flue gas is from dry method The smoke inlet of desulfurizing tower inputs, and the outlet in the gas-solid mixing storehouse is connected to the desulfurizing agent entrance of dry desulfurizing tower, and dry method is de- The outlet of sulphur tower is connected to the entrance of expansion chamber；
C, catalyst filter house,
Catalyst filter house includes catalyst filter collector, and catalyst filter collector entrance connects the outlet of expansion chamber；
D, denitration portion,
Denitration portion includes denitration SCR reactors, is passed through between the entrance and the outlet of catalyst filter collector of denitration SCR reactors Denitration pipe is connected；Denitration SCR reactor outlets are connected with air-introduced machine；
E, ammonia supply department,
Ammonia supply department includes ammonia input pipe, gas mixing storehouse and dilution air, and the pipeline of ammonia input pipe is equipped with successively to close Disconnected valve, flowmeter, regulating valve and pressure gauge, the two entrances in gas mixing storehouse are separately connected the outlet and dilution of ammonia input pipe The outlet of wind turbine, gas mixing storehouse is connected with denitration pipe；
F, white lime circulation portions,
White lime circulation portions include that third rotary valve, white lime fluidisation Lower Hold, fluidized air blower and batcher, third rotary valve are set to The ash bucket of catalyst filter collector exports, and white lime fluidizes Lower Hold and is set to below third rotary valve and rotates valve outlet phase with third Connection, the outlet of fluidized air blower are connected to white lime fluidisation Lower Hold and are used to flow the white lime in white lime fluidisation Lower Hold Change；The ash bucket that the batcher is set to expansion chamber exports, and the outlet that white lime fluidizes Lower Hold also exports phase with the ash bucket of expansion chamber Connection；
G, by-product collection portion,
By-product collection portion includes Pneumatic ash conveying machine and by-product storage warehouse, and Pneumatic ash conveying machine entrance fluidizes Lower Hold phase with white lime Even, Pneumatic ash conveying machine outlet is connected with by-product storage warehouse, and the top of by-product storage warehouse is equipped with the second deduster.
The invention has the advantages that
One, flue gas of glass melting furnace administers SO2Control use dry desulfurizing tower and white lime recycle utilization, in high circulation ratio With Ca/S in the case that lower, make SO2Emission compliance；In conjunction with catalyst filter collector technique, completed at desulfurization in high temperature section Reason；Meanwhile the by-product after desulfurization enters catalyst filter collector and is dusted, and reduces the particle concentration of flue gas, protects Rear end SCR denitration reactor is protected；The control of nitrogen oxides uses SCR denitration reactor, because of the catalyst dust removal by filtration of its front end Particle concentration can be down to very low level by device, protect catalyst, meanwhile, denitration reaction has no the generation of particulate matter, will not Increase the particle concentration of flue gas emission.
Two, catalyst filter collector can not only be used for the rear end dust collect plant of desulfurization, while but also as the collection of denitration front end Dirt device, compared to the mode of traditional semi-dry desulphurization+sack cleaner and hot electrostatic precipitator+SCR denitration reactor, section Occupation of land has been saved, technological process is simplified.
Three, using white lime circulating technology, by the cycle multiple for improving white lime, it is ensured that the stone in dry desulfurizing tower Ash concentration is improved to 100g/m3, ensure that outlet SO2Concentration is up to standard；Meanwhile the repeatable utilization of white lime, improve white lime Utilization rate reduces Ca/S, reduces material consumption.
Four, conventional high-temperature electric precipitator is replaced using catalyst filter collector, efficiency of dust collection higher, system is more stable.
Five, the form being combined using catalyst filter collector+SCR denitration reactor is filtered out than being crossed using catalyst merely The service life is longer for dirt device, saves replacement cost.
Six, flue gas can meet glass melter minimum discharge requirement after this system process.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples：
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the enlarged diagram that lime storage of the present invention transports portion；
Fig. 3 is the enlarged diagram of inventive desulfurization subsidence part；
Fig. 4 is the enlarged diagram of catalyst filter house of the present invention；
Fig. 5 is the enlarged diagram in denitration portion of the present invention；
Fig. 6 is the enlarged diagram of ammonia supply department of the present invention；
Fig. 7 is the enlarged diagram of white lime circulation portions of the present invention；
Fig. 8 is the enlarged diagram of by-product collection portion of the present invention.
Specific implementation mode
As shown in Figure 1, the present invention provides a kind of high temperature desulfurizing denitration flue gas dust collecting system, including：
A, lime storage transports portion,
In conjunction with shown in Fig. 2, the lime storage portion of transporting includes white lime storage warehouse 12, and 12 top of white lime storage warehouse is removed equipped with first Dirt device 11；12 bottom of white lime storage warehouse is equipped with the first rotary valve 13, and 13 lower section of the first rotary valve is from top to bottom equipped with to be connected successively Logical weighing cabin 14, screw conveyor 15, the second rotary valve 16 and gas-solid mixing storehouse 17；The two entrances in gas-solid mixing storehouse 17 point Not Lian Jie conveying fan 18 and the second rotary valve 16 outlet；
B, desulfurization subsidence part,
In conjunction with shown in Fig. 3, desulfurization subsidence part includes dry desulfurizing tower 31 and expansion chamber 41, and venturi is equipped in dry desulfurizing tower 31 Accelerator 32, flue gas are inputted from the smoke inlet of dry desulfurizing tower 31, and the outlet in the gas-solid mixing storehouse 17 is connected to dry method and takes off The desulfurizing agent entrance of sulphur tower 31, the outlet of dry desulfurizing tower 31 are connected to the entrance of expansion chamber 41；
C, catalyst filter house,
In conjunction with shown in Fig. 4, catalyst filter house includes catalyst filter collector 51, and 51 entrance of catalyst filter collector connects expansion chamber 41 outlet；
D, denitration portion,
In conjunction with shown in Fig. 5, denitration portion includes denitration SCR reactors 61, entrance and the catalyst dust removal by filtration of denitration SCR reactors 61 It is connected by denitration pipe 62 between the outlet of device 51；The outlet of denitration SCR reactors 61 is connected with air-introduced machine 63；
E, ammonia supply department,
In conjunction with shown in Fig. 6, ammonia supply department includes that ammonia input pipe 27, gas mixing storehouse 25 and 26 machine of dilution air, ammonia are defeated The pipeline for entering pipe 27 is equipped with shut-off valve 21, flowmeter 22, regulating valve 23 and pressure gauge 24 successively, and two of gas mixing storehouse 25 enter Mouth is separately connected outlet and the dilution air 26 of ammonia input pipe 27,
The outlet in gas mixing storehouse 25 is connected with denitration pipe 62；
F, white lime circulation portions,
In conjunction with shown in Fig. 7, white lime circulation portions include third rotary valve 71, white lime fluidisation Lower Hold 72, fluidized air blower 73 and give Material machine 74, the ash bucket that third rotary valve 71 is set to catalyst filter collector 51 export, and white lime fluidizes Lower Hold 72 and revolved set on third 71 lower section of rotary valve is simultaneously connected with third rotation valve outlet, and the outlet of fluidized air blower 73 is connected to white lime fluidisation Lower Hold 72 and is used for White lime in white lime fluidisation Lower Hold is fluidized；The ash bucket that the batcher 74 is set to expansion chamber 41 exports, white lime The outlet of fluidisation Lower Hold 72 is also connected with the outlet of the ash bucket of expansion chamber 41；
G, by-product collection portion,
In conjunction with shown in Fig. 8, by-product collection portion includes Pneumatic ash conveying machine 81 and by-product storage warehouse 82,81 entrance of Pneumatic ash conveying machine Be connected with white lime fluidisation Lower Hold 72, Pneumatic ash conveying machine 81, which is exported, is connected 82 with by-product storage warehouse, by-product storage warehouse 82 Top is equipped with the second deduster 83.
In use, white lime is poured into white lime storage warehouse 12, the first deduster 11 can when pouring into white lime into Row dedusting；The first rotary valve 13 and the second rotary valve 16 are opened, white lime powder enters helical feed after being weighed by weighing cabin 14 White lime powder is sent into gas-solid mixing storehouse 17 by machine 15, screw conveyor 15, and conveying fan 18 inputs sky to gas-solid mixing storehouse 17 Gas enters dry desulfurizing tower 31 with the mixed white lime powder of air；Into dry desulfurizing tower 31 flue gas in hydrated lime in powder Desulfurization under the action of end enters expansion chamber 41 later, and the flue gas after desulfurization enters catalyst filter collector 51, clean after dedusting Neat stress enters denitration SCR reactors 61, and the ammonia after dilution air 26 dilutes inputs denitration SCR reactors by denitration pipe 62 61, to carry out denitration to flue gas, the flue gas after denitration is discharged through air-introduced machine 63；The ash bucket discharge of catalyst filter collector 51 is ripe Lime enters white lime through third rotary valve 71 and fluidizes Lower Hold 72, and white lime is fluidized wind turbine in white lime fluidisation Lower Hold 72 White lime is sent into the cycle that dry desulfurizing tower 31 realizes white lime by 73 fluidisations, batcher 74；A part of white lime is by pneumatic transporting Grey machine 81 is sent into by-product storage warehouse 82 and is recycled.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form；Appoint What those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the side of the disclosure above Method and technology contents make many possible changes and modifications to technical solution of the present invention, or are revised as the equivalent reality of equivalent variations Apply example.Therefore, every content without departing from technical solution of the present invention, according to the technical essence of the invention does above example Any simple modification, equivalent replacement, equivalence changes and modification, still fall within technical solution of the present invention protection in the range of.

Claims (1)

1. a kind of high temperature desulfurizing denitration flue gas dust collecting system, which is characterized in that including：
A, lime storage transports portion,
The lime storage portion of transporting includes white lime storage warehouse, and the first deduster is equipped at the top of white lime storage warehouse；White lime stores Orlop portion is equipped with the first rotary valve, and the weighing cabin being sequentially communicated, screw conveyor, the are from top to bottom equipped with below the first rotary valve Two rotary valves and gas-solid mixing storehouse；The entrance in gas-solid mixing storehouse is separately connected the outlet of conveying fan and the second rotary valve；
B, desulfurization subsidence part,
Desulfurization subsidence part includes dry desulfurizing tower and expansion chamber, is equipped with venturi accelerator in dry desulfurizing tower, and flue gas is from dry method The smoke inlet of desulfurizing tower inputs, and the outlet in the gas-solid mixing storehouse is connected to the desulfurizing agent entrance of dry desulfurizing tower, and dry method is de- The outlet of sulphur tower is connected to the entrance of expansion chamber；
C, catalyst filter house,
Catalyst filter house includes catalyst filter collector, and catalyst filter collector entrance connects the outlet of expansion chamber；
D, denitration portion,
Denitration portion includes denitration SCR reactors, is passed through between the entrance and the outlet of catalyst filter collector of denitration SCR reactors Denitration pipe is connected；Denitration SCR reactor outlets are connected with air-introduced machine；
E, ammonia supply department,
Ammonia supply department includes ammonia input pipe, gas mixing storehouse and dilution air, and the pipeline of ammonia input pipe is equipped with successively to close Disconnected valve, flowmeter, regulating valve and pressure gauge, the two entrances in gas mixing storehouse are separately connected the outlet and dilution of ammonia input pipe The outlet of wind turbine, gas mixing storehouse is connected with denitration pipe；
F, white lime circulation portions,
White lime circulation portions include that third rotary valve, white lime fluidisation Lower Hold, fluidized air blower and batcher, third rotary valve are set to The ash bucket of catalyst filter collector exports, and white lime fluidizes Lower Hold and is set to below third rotary valve and rotates valve outlet phase with third Connection, the outlet of fluidized air blower are connected to white lime fluidisation Lower Hold and are used to flow the white lime in white lime fluidisation Lower Hold Change；The ash bucket that the batcher is set to expansion chamber exports, and the outlet that white lime fluidizes Lower Hold also exports phase with the ash bucket of expansion chamber Connection；
G, by-product collection portion,
By-product collection portion includes Pneumatic ash conveying machine and by-product storage warehouse, and Pneumatic ash conveying machine entrance fluidizes Lower Hold phase with white lime Even, Pneumatic ash conveying machine outlet is connected with by-product storage warehouse, and the top of by-product storage warehouse is equipped with the second deduster.
CN201810938549.3A 2018-08-17 2018-08-17 A kind of high temperature desulfurizing denitration flue gas dust collecting system Withdrawn CN108786409A (en)

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CN201810938549.3A CN108786409A (en) 2018-08-17 2018-08-17 A kind of high temperature desulfurizing denitration flue gas dust collecting system

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109364736A (en) * 2018-12-15 2019-02-22 深圳市凯盛科技工程有限公司 Electronic glass total oxygen melting furnaces production line flue gas collaboration processing integrated apparatus
CN111921355A (en) * 2020-08-26 2020-11-13 深圳市凯盛科技工程有限公司 Flue gas dust removal system and dust removal process for high borosilicate glass industrial melting furnace
CN112263901A (en) * 2020-10-23 2021-01-26 深圳市凯盛科技工程有限公司 Titanium white powder production line flue gas waste heat utilization system
CN112263900A (en) * 2020-10-20 2021-01-26 深圳市凯盛科技工程有限公司 Flue gas desulfurization, denitrification and dust removal device for industrial kiln

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CN108176204A (en) * 2017-12-26 2018-06-19 四川大学 Flue gas and desulfurizing and denitrifying integrated purification system and purification method

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CN204469514U (en) * 2015-01-09 2015-07-15 无锡市神陆液压机件有限公司 A kind of boiler smoke denitration in the stove device
CN204933241U (en) * 2015-09-01 2016-01-06 中冶焦耐工程技术有限公司 A kind of coke oven dust Refining Equipmeut for Desulfuration in Gas
CN105169942A (en) * 2015-09-23 2015-12-23 广州创能环保科技有限公司 Glass melter flue gas dust removal, desulfurization and denitrification synergetic treatment system, treatment method and application
CN205288082U (en) * 2015-11-16 2016-06-08 陈灵燕 Msw incineration tail gas cleanup unit
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109364736A (en) * 2018-12-15 2019-02-22 深圳市凯盛科技工程有限公司 Electronic glass total oxygen melting furnaces production line flue gas collaboration processing integrated apparatus
CN111921355A (en) * 2020-08-26 2020-11-13 深圳市凯盛科技工程有限公司 Flue gas dust removal system and dust removal process for high borosilicate glass industrial melting furnace
CN112263900A (en) * 2020-10-20 2021-01-26 深圳市凯盛科技工程有限公司 Flue gas desulfurization, denitrification and dust removal device for industrial kiln
CN112263901A (en) * 2020-10-23 2021-01-26 深圳市凯盛科技工程有限公司 Titanium white powder production line flue gas waste heat utilization system

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