CN101837239A - System for dehydration of acid mist dust of plaster and dust removal and desulfurization of fluidized bed furnace by baking by using residual heat - Google Patents

System for dehydration of acid mist dust of plaster and dust removal and desulfurization of fluidized bed furnace by baking by using residual heat Download PDF

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Publication number
CN101837239A
CN101837239A CN201010134823A CN201010134823A CN101837239A CN 101837239 A CN101837239 A CN 101837239A CN 201010134823 A CN201010134823 A CN 201010134823A CN 201010134823 A CN201010134823 A CN 201010134823A CN 101837239 A CN101837239 A CN 101837239A
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dust
fluidized bed
bed furnace
settling compartment
acid mist
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CN101837239B (en
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杨朴
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LIXIAN JINHUI GYPSUM PRODUCTS CO Ltd
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LIXIAN JINHUI GYPSUM PRODUCTS CO Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

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  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention discloses a system for the dehydration of acid mist dust of plaster and the dust removal and desulfurization of fluidized bed furnace by baking by using residual heat. The system consists of an air inlet pipe, a dust settling chamber, an exhaust pipe, a valve, an auger, a dust-settling bucket at the tail of the fluidized bed boiler, a double cyclone dust collector, a secondary cyclone dust collector, a draught fan, a water film desulphurization device, a chimney, and a scraper conveyor and is characterized in that the dust settling chamber is arranged at the top of the fluidized bed boiler; the moisture of the dusty airflow through the dust settling chamber is evaporated on a stainless steel plate of the dust settling chamber under the action of the residual heat; dry powder slides into the auger at the bottom from the stainless steel plate of the dust settling chamber to be output from the dust settling chamber for recycling; the air inlet pipe of the dust settling chamber is connected with a burner hood of a drier; an air outlet pipe is connected with the dust-settling bucket of an induced duct of the fluidized bed boiler; and the clean air at the tail of the dust settling chamber is sucked into a dust-removal system at the tail of the fluidized bed boiler by using the suction force of the draught fan and then discharged from the chimney. The system of the invention solves the problem of environmental pollution caused by the direct discharge of sulfur-bearing gas and water-bearing acid mist dusts during production of plaster powder, can recycle a large amount of plaster dusts and is suitable for plaster powder manufacturing enterprises.

Description

A kind of waste heat that utilizes bakes gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system
[technical field] patent of the present invention relates to a kind ofly to be utilized waste heat to bake acid mist dirt and reaches the dehydration of acid mist dirt, depositing dust, recycling and fluidized bed furnace dedusting and dust removal with desulfurization by water film system, belongs to environmental technology field.
[background technology] is well-known, a large amount of sulfurous gas and acid mist dirt is arranged directly to airborne release in the land plaster production process, and this sulfurous gas and acid mist dirt are quite big to the destruction of trees, vegetation, and not even a blade of grass grows in the place of arrival; And there is a large amount of land plasters to drop to around the chimney on the soil in the number kilometer range or on the building, destroy local ecological environment, have a strong impact on local resident's production, life and healthy, though relevant department and manufacturer have taked a lot of measures, but still have many land plasters manufacturer still to have the problems referred to above at present, tracing it to its cause is also not have a cover can thoroughly solve the equipment of sulfurous gas and acid mist dirt at present.
[summary of the invention] directly will destroy local ecological environment to airborne release sulfurous gas and acid mist dirt in order to solve in the existing land plaster production process, have a strong impact on local resident's production, life and healthy problem, the invention provides a kind of profit utilizes waste heat to bake gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system, with eliminate or when alleviating land plaster and producing to the pollution of ecological environment, to the influence of people's productive life, and recycle a large amount of land plasters, reduce production costs.
For solving its technical problem, the technical solution used in the present invention is: design one cover comprises air inlet pipe, dust-settling compartment, blast pipe and valve, auger, fluidized bed furnace afterbody depositing dust bucket, double-cyclone dust collector, second cyclone dust extractor, air-introduced machine, moisture film desulfurizer and chimney, the waste heat that utilizes of drag conveyor bakes gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system, described dust-settling compartment is installed in the fluidized bed furnace top, be provided with a plurality of stainless steel separators in the dust-settling compartment, the bottom of dust-settling compartment is provided with the auger of major axis, utilize the waste heat of fluidized bed furnace to act on the interior a plurality of stainless steel separators of dust-settling compartment, will be by the water evaporates in the dust-contained airflow of dust-settling compartment, dry powder slides into output dust-settling compartment recycling the auger of bottom from the corrosion resistant plate of dust-settling compartment; The air inlet pipe of dust-settling compartment is connected with the kiln hood cover of dryer, and the escape pipe of dust-settling compartment is connected with the induced duct depositing dust bucket of fluidized bed furnace, utilizes air-introduced machine suction with dust-settling compartment afterbody pure qi (oxygen) inspiration fluidized bed furnace afterbody dust pelletizing system, arranges in atmosphere through chimney again.The blast pipe of dust-settling compartment is provided with the valve of control flow, and the size of valve opening is with not excessive being as the criterion of dryer kiln hood cover junction surface gas;
Compared with prior art, the present invention has following characteristics and progress:
1, solved in the land plaster production process sulfurous gas and aqueous acids spray dust directly discharging cause environmental pollution problems, help implementing of national energy-saving and emission-reduction policy, help ecological environment and be not damaged.
2, UTILIZATION OF VESIDUAL HEAT IN, energy savings.Fluidized bed furnace is in dryer gypsum dehydration process, and the top has a large amount of waste heats to distribute, and utilizes the waste heat roasting to examine acid cloud and dewaters, and waste heat has obtained good utilization.
3, dust recycling.A land plaster factory that produces 30000 tons per year, annual recyclable 200-300 ton land plaster can be saved the production cost of ten thousand yuan of 5-7.
4, the deduster energy consumption is low.Each system needs only a U150 auger, and this auger only needs the 1.5KW-2.2KW motor, and the system airflow operation needs only the fluidized bed furnace air-introduced machine of a 11KW, so system operation cost is extremely low.
5, save the labour.As long as debug, operation needs the workman to operate hardly.
[description of drawings] the present invention is further described below in conjunction with the drawings and specific embodiments
Fig. 1 is a dust-settling compartment structural representation of the present invention,
Fig. 2 is an overall structure schematic diagram of the present invention,
Among the figure: 1, gypsum dehydration acid mist dirt air inlet pipe, 2, dust-settling compartment, 3, dust-settling compartment demarcation strip, 4, steam brick, 5 alumina silicate heat-preservation cotton, 6, China fir plate, 7, blast pipe, 8, fluidized bed furnace, 9, auger (conveying worm), 10, row's dust pipe, 11, double-cyclone dust collector, 12, exhaust valve, 13, fluidized bed furnace afterbody depositing dust bucket, 14, second cyclone dust extractor, 15, air-introduced machine, 16, the dust removal with desulfurization by water film device, 17, chimney, 18, dust hopper, 19, relay valve, 20, drag conveyor.
[specific embodiment] is with reference to accompanying drawing: a kind of waste heat that utilizes bakes gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system, bag is mainly by air inlet pipe 1, dust-settling compartment 2, blast pipe 7, exhaust valve 12, auger 9, fluidized bed furnace afterbody depositing dust bucket 13, double-cyclone dust collector 11, second cyclone dust extractor 14, air-introduced machine 15, moisture film desulfurizer 16 and chimney 17, drag conveyor 20 is formed, dust-settling compartment 2 is installed in the top of boiling body of heater 8, the body of heater exterior wall is increased two meters, be beneficial to insulation, U150 type auger 9 (conveying worm) is installed in the middle of the furnace roof, the auger length long 0.5-0.6m of body of heater that seethes with excitement, one end of auger is connected with motor, the other end is provided with row's dust pipe 10, in order to discharge dust.Auger top is 60 degree with ∠ 40 angle steel weldering grid, two sides angle, high 1.7m, and oblique wide 1.95m, the corrosion resistant plate staking is on the grid of ∠ 40 angle steel welding.In the dust-settling compartment is the elongated skewed slot, be divided into four chambers with three trapezoidal dust-settling compartment demarcation strips 3 in this skewed slot, each chamber width is about 1.5m, dividing plate is welded into trapezoidal with angle bar, riveting corrosion resistant plate (thickness 0.6mm-0.8mm), dividing plate has ventilation of going up and two kinds of ventilations down, and when Inlet Manifold Design during in last air inlet, gas outlet, a Room is following; Gas outlet, two Room is last; Gas outlet, three Room is following; Gas outlet, four Room is last, and last gas outlet, chamber must be last.The flow direction of air-flow is a undaform, can increase gas channel length and increases and the corrosion resistant plate contact area.The top of dust-settling compartment 2 covers completely with China fir plate 6,30 millimeters of the thickness of China fir plate, and pad one deck alumina silicate heat-preservation cotton 5 on the China fir plate, the top of China fir plate paved with steam brick 4, and dust-settling compartment is close and not tight, and favourable steam distributes.Tail gas and fluidized bed furnace flue gas that dust-settling compartment is discharged are compiled in the dust hopper 18, and most of dust is just fallen into dust hopper, by relay valve 19 automatic removing dusts to drag conveyor 20.Drag conveyor is installed to outside the workshop by the fluidized bed furnace bottom always, ashes is delivered to the ash material with strength handles the field.Mist after turning is upwards entered in the bispin wind deduster 11 in parallel through pipeline by dust hopper, because the air-flow basal area multiplication that bispin wind deduster in parallel is passed through, wind speed lowers, won a good depositing dust time, 80% dust is down into the bottom of this deduster thus, and row is in drag conveyor 20 automatically by relay valve, and the double-cyclone dust collector intended diameter is 1.2m, height 4.2m crosses air quantity and is 6000 to 8000m 3/ h; The top 11 of double-cyclone dust collector is communicated with second cyclone dust extractor 14 air inlet pipe, and gas enters second cyclone dust extractor depositing dust once more, has 15% left and right sides flue dust to be lowered again, and is arranged in the scraper plate machine automatically by the relay valve of deduster bottom; Second cyclone dust extractor 14 is designed to diameter design 1.4m, height 4.8m-5.2m, and crossing air quantity is 10000-20000m 3/ h.The top of secondary whirlwind links to each other with air-introduced machine 15 by pipeline, the exhaust air rate 8000m of this air-introduced machine 3/ h-10000m 3/ h, blast is 5000-7000KPa, the flow velocity that contain the mist of a small amount of flue gas this moment increases rapidly, blast increases, the outlet of air-introduced machine links to each other with dust removal with desulfurization by water film device 16 by pipeline, gas blows in the moisture film depositing dust desulfurizer, hydrogen sulfide content after water is taken a shower, sulfur dioxide, pernicious gases such as carbon dioxide are adsorbed with water, the Purge gas of band water smoke is arranged to atmosphere through chimney 17, water quality in the simple and easy wet desulphurization device for reducing dust of moisture film is acid can constantly to be increased, and is equipped with soda ash, the quick lime adding neutralizes in the pond, adjusts acid-base value, with the test of PH test paper is neutral, can outwards discharge.

Claims (5)

1. utilize waste heat to bake gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system, by air inlet pipe, dust-settling compartment, blast pipe and valve, auger, fluidized bed furnace afterbody depositing dust bucket, double-cyclone dust collector, second cyclone dust extractor, air-introduced machine, moisture film desulfurizer and chimney, drag conveyor is formed, it is characterized in that: described dust-settling compartment is installed in the fluidized bed furnace top, be provided with a plurality of stainless steel separators in the dust-settling compartment, the bottom of dust-settling compartment is provided with the auger of major axis, utilize the waste heat of fluidized bed furnace to act on the interior a plurality of stainless steel separators of dust-settling compartment, will be by the water evaporates in the dust-contained airflow of dust-settling compartment, dry powder slides into output dust-settling compartment recycling the auger of bottom from the corrosion resistant plate of dust-settling compartment; The air inlet pipe of dust-settling compartment is connected with the kiln hood cover of dryer, and the escape pipe of dust-settling compartment is connected with the induced duct depositing dust bucket of fluidized bed furnace, utilizes air-introduced machine suction with dust-settling compartment afterbody pure qi (oxygen) inspiration fluidized bed furnace afterbody dust pelletizing system, arranges in atmosphere through chimney again.
2. bake gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system according to the described waste heat that utilizes of claim 1, it is characterized in that: be the elongated skewed slot in the dust-settling compartment, be divided into four chambers with three trapezoidal dividing plates in this skewed slot, each chamber width is 1.4~1.6m, dividing plate is welded into trapezoidal with angle bar, and riveting thickness is the corrosion resistant plate of 0.6mm~0.8mm, dividing plate has the ventilation of going up and ventilates two kinds down, when Inlet Manifold Design during in last air inlet, gas outlet, one Room is following, and gas outlet, two Room is last, and gas outlet, three Room is following, gas outlet, four Room is last, and last gas outlet, chamber must be last; The top of dust-settling compartment covers completely with the China fir plate, 25~35 millimeters of the thickness of China fir plate, and pad one deck alumina silicate heat-preservation cotton on the China fir plate, the top of China fir plate paved with the steam brick, and dust-settling compartment is close and not tight.
3. bake gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system according to claim 1 or the 2 described waste heats that utilize, it is characterized in that the blast pipe of dust-settling compartment is provided with the valve of control flow, this valve can be regulated the size of aperture.
4. bake gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system according to claim 1 or the 2 or 3 described waste heats that utilize, it is characterized in that: tail gas and fluidized bed furnace fume pipe that dust-settling compartment is discharged are parallel in the blast pipe, the lower end of blast pipe is provided with relay valve, the exhaust pipe mouth below is provided with drag conveyor, and drag conveyor is handled the field by the ash material that the fluidized bed furnace bottom is installed to outside the workshop always.
5. bake gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system according to the described waste heat that utilizes of claim 1, it is characterized in that: the diameter of double-cyclone dust collector is 1.1~103m, height 4.1~403m, and crossing air quantity is 6000~8000m 3/ h; The top of double-cyclone dust collector is provided with tracheae with the top of second cyclone dust extractor and is communicated with, and the deduster bottom is provided with relay valve, and the below of relay valve is provided with the scraper plate machine.
6, bake gypsum dehydration acid mist dirt and fluidized bed furnace dusting and desulfuring system according to the described waste heat that utilizes of claim 1, it is characterized in that: the diameter of second cyclone dust extractor is 1.3~1.5m, height 4.8m~5.2m, and crossing air quantity is 10000~20000m 3/ h, the top of secondary whirlwind links to each other with air-introduced machine by pipeline, and this exhaust air rate of going into air-introduced machine is 000m 3~10000m 3, blast is 5000~7000KPa
Figure FSA00000045458500011
CN2010101348235A 2010-03-25 2010-03-25 System for dehydration of acid mist dust of plaster and dust removal and desulfurization of fluidized bed furnace by baking by using residual heat Expired - Fee Related CN101837239B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104550127A (en) * 2015-01-19 2015-04-29 郑州佑飞机电科技有限公司 Novel environmentally-friendly particular and powdered material surface cleaning system
CN104791806A (en) * 2015-04-22 2015-07-22 福建龙岩尔彬农业发展有限责任公司 Efficient dedusting and deodorizing garbage incinerator
CN105731843A (en) * 2016-01-23 2016-07-06 澧县方石坪镇杨朴矿山机械厂 Dustless production method of building gypsum powder
CN110038369A (en) * 2019-04-28 2019-07-23 镇江江南化工有限公司 A kind of method that eddy flow combination ultrafiltration membrane removes ultra tiny droplet in industrial gasses
CN113952817A (en) * 2020-07-15 2022-01-21 桃源县平安机械设备制造有限公司 Multistage adjustable dust removal equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2176818Y (en) * 1992-07-13 1994-09-14 陈洪俊 Dusting device
CN2230615Y (en) * 1995-07-28 1996-07-10 魏忠武 Wet desulfurizing and dust collecting apparatus
JPH1057743A (en) * 1996-08-14 1998-03-03 Mitsubishi Heavy Ind Ltd Dust removing device
CN2283513Y (en) * 1996-08-30 1998-06-10 卜秋芝 Adsorption boiler dust remover
JPH10314623A (en) * 1997-05-15 1998-12-02 Ishikawajima Harima Heavy Ind Co Ltd Cyclone dust collector and circulating fluidized bed boiler using same
CN2496541Y (en) * 2001-08-23 2002-06-26 东北大学 Dust-precipitating and desulfurizing integration apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2176818Y (en) * 1992-07-13 1994-09-14 陈洪俊 Dusting device
CN2230615Y (en) * 1995-07-28 1996-07-10 魏忠武 Wet desulfurizing and dust collecting apparatus
JPH1057743A (en) * 1996-08-14 1998-03-03 Mitsubishi Heavy Ind Ltd Dust removing device
CN2283513Y (en) * 1996-08-30 1998-06-10 卜秋芝 Adsorption boiler dust remover
JPH10314623A (en) * 1997-05-15 1998-12-02 Ishikawajima Harima Heavy Ind Co Ltd Cyclone dust collector and circulating fluidized bed boiler using same
CN2496541Y (en) * 2001-08-23 2002-06-26 东北大学 Dust-precipitating and desulfurizing integration apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104550127A (en) * 2015-01-19 2015-04-29 郑州佑飞机电科技有限公司 Novel environmentally-friendly particular and powdered material surface cleaning system
CN104791806A (en) * 2015-04-22 2015-07-22 福建龙岩尔彬农业发展有限责任公司 Efficient dedusting and deodorizing garbage incinerator
CN105731843A (en) * 2016-01-23 2016-07-06 澧县方石坪镇杨朴矿山机械厂 Dustless production method of building gypsum powder
CN110038369A (en) * 2019-04-28 2019-07-23 镇江江南化工有限公司 A kind of method that eddy flow combination ultrafiltration membrane removes ultra tiny droplet in industrial gasses
CN113952817A (en) * 2020-07-15 2022-01-21 桃源县平安机械设备制造有限公司 Multistage adjustable dust removal equipment

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