CN201666719U - Coal dust hot-air furnace system of spray dryer - Google Patents

Coal dust hot-air furnace system of spray dryer Download PDF

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Publication number
CN201666719U
CN201666719U CN2009202372889U CN200920237288U CN201666719U CN 201666719 U CN201666719 U CN 201666719U CN 2009202372889 U CN2009202372889 U CN 2009202372889U CN 200920237288 U CN200920237288 U CN 200920237288U CN 201666719 U CN201666719 U CN 201666719U
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CN
China
Prior art keywords
coal
hot
air furnace
drying tower
dust
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Application number
CN2009202372889U
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Chinese (zh)
Inventor
霍丰源
赵占东
郝光恒
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霍丰源
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Priority to CN2009202372889U priority Critical patent/CN201666719U/en
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Publication of CN201666719U publication Critical patent/CN201666719U/en

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Abstract

The utility model discloses a coal dust hot-air furnace system of a spray dryer, which comprises a crushing conveyer, a fixed type magnetic separating screen, a hopper type hoister, a coal storing bin, a coal grinder, a coal conveying pipe, a pre-burning combustor, a combustion-supporting air blower, a boiling hot air furnace and a drying tower, wherein a hot-air dust collector and a dust-collecting air blower are arranged between the drying tower and the boiling hot air furnace. The hot-air dust collector is arranged between the drying tower and the boiling hot air furnace, therefore, the coal dust hot-air furnace system of the spray dryer further removes dust caused by insufficient combustion, thus further reducing the dust in the drying tower and guaranteeing the quality of products, and further reducing the dust discharged into air and less polluting the environment.

Description

Spray dryer pulverized coal hot air furnace system

Technical field

The utility model relates to a kind of hot blast stove system, relates in particular to a kind of spray dryer pulverized coal hot air furnace system.

Background technology

Spray-drying is the big power consumer of industries such as pottery.According to statistics, the energy of its consumption accounts for 30%~40% of heat energy total burn-off.At present, be used for spray-dired coal-fired hot-blast stove and mainly contain 4 kinds, be i.e. water-coal-slurry mode, chain furnace mode, handwarmer mode and coal-fired powder mode.

Estimate the quality of hot-blast stove, topmost standard mainly is energy-conserving and environment-protective, cuts operating costs, and guarantees the quality of dry products, for the user brings economic interests.

The water-coal-slurry hot-blast stove is simple in structure, easy operating, and the efficiency of combustion height can reach 90%.Its shortcoming is: water-coal-slurry preparation, transportation and storage process are complicated, and the igniting baker needs oil firing, must build oil storage tank, lay oil pipeline, and this has just increased construction cost.Coal-water slurry nozzle easily stops up, quick abrasion, owing to after water-coal-slurry sprays in the stove, under the photothermal effect of furnace flame water evaporates is ignited, its ignition point is far away.Thereby the easy coking of burner hearth, thereby influence atomizing and combustion efficiency make not burn coal ash in a large number and enter drying tower with hot blast and sneak into powder, influence properties of powder.

The traveling-grate stoker hot-blast stove raw coal that directly burns, so simple in structure, heat supply is stable, automaticity height, small investment.Its shortcoming is: coal is had requirement, and low calorific value coal is not suitable for this stove, and efficiency of combustion is lower, is generally about 75%; If coal ash fusion temperature is lower, then easily coking.

It also is the raw coal that directly burns that hand burns hot-blast stove, is the simplest in several coal-fired hot-blast stoves, and power consumption is minimum, and it all adopts manually-operated, and equipment investment is few.Its shortcoming is, floor space is big, and dust is big, the heat supply instability, open fire door intermittently coal, intermittently during scarfing cinder, a large amount of cold wind enter in the stove, make fire box temperature sharply descend, influence burning and heat supply.At this moment, the soot amount in the hot blast sharply increases, and enters drying tower with hot blast, influences the quality and the performance of powder.

Pulverized coal hot air furnace automaticity height, heat supply is stable, is most effective in several coal furnaces, if the very thin efficiency of combustion of coal powder size can reach more than 95%.The fire box temperature height is strong to the adaptability of coal.Because burning fully, so the entrained flying dust of hot blast pollutes little to the powder of drying tower.Its shortcoming is: still have dust and enter the drying tower polluted product, and be discharged into contaminated environment in the environment.

The utility model content

In view of the problems referred to above of prior art, the purpose of this utility model provides a kind of to environment and the few spray dryer pulverized coal hot air furnace system of contamination of products.

To achieve these goals, the utility model provides a kind of spray dryer pulverized coal hot air furnace system, comprise broken conveyer, fixed magnetic separation sieve, bucket elevator, coal store, coal pulverizer, coal chute, preheating type burner, combustion-supporting air blast, boiling hot-blast stove and drying tower, be provided with hot blast deduster and dedusting air blast between described drying tower and the described boiling hot-blast stove.

As preferably, also be provided with fume extractor on the described drying tower, described fume extractor comprises cyclone dust collectors, fountain hydrofilter and chimney.

As preferably, described coal pulverizer is a fan-type.

As preferably, also be provided with the UTILIZATION OF VESIDUAL HEAT IN passage around the described boiling hot-blast stove.

As preferably, also be provided with sealing ash storage chamber between described drying tower and the described boiling hot-blast stove, the dust that the described hot blast deduster of described sealing ash storage chamber's collection process disposes.

The beneficial effects of the utility model are, by between drying tower and described boiling hot-blast stove, the hot blast deduster being set, further removed the dust that may produce because burning is insufficient, the dust that enters in the drying tower further reduces, and has guaranteed the quality of product.And being discharged into also minimizing thereupon of dust in air, environmental pollution is littler.

Description of drawings

Fig. 1 is a spray dryer pulverized coal hot air furnace system architecture schematic diagram of the present utility model.

Fig. 2 is a spray dryer pulverized coal hot air furnace system works flow process schematic diagram of the present utility model.

The specific embodiment

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.

Spray dryer pulverized coal hot air furnace system architecture schematic diagram of the present utility model as shown in Figure 1, it comprises broken conveyer 1, fixed magnetic separation sieve 2, bucket elevator 3, coal store 4, coal pulverizer 5, coal chute 6, preheating type burner 7, combustion-supporting air blast 8, boiling hot-blast stove 9 and drying tower 12, drying tower 12 and seethe with excitement and be provided with hot blast deduster 10 and dedusting air blast 11 between hot 9 wind furnaces.In order to make full use of heat energy, around the boiling hot-blast stove, be provided with the UTILIZATION OF VESIDUAL HEAT IN passage.

Spray dryer pulverized coal hot air furnace system works flow process schematic diagram of the present utility model as shown in Figure 2, raw coal is through coarse crushing and be dried to (the H that meets the requirements 2O% ≯ 6%), this benefit that will do is the air dry that is beneficial to coal, meets the coal of moisture requirement for the northern area of China, and this operation can be omitted.In broken after through magnetic separation, screening, coal-grinding, burning, the dust after the burning is got rid of, send into drying tower.

The utility model formally designs based on this flow process.To add fragmentation at coal yard coarse crushing, dried raw coal and be input into machine 1, and be crushed to granularity ≯ 10mm, after fixed magnetic separation sieve 2 automatic magnetic separation and screening, it is standby to deliver to coal store 4 by bucket elevator 3 again.Coal store 4 is communicated with the hopper of coal pulverizer 5 (preferred fan-type), and the coal amount can be replenished automatically.When system moved, coal pulverizer 5 was worn into granularity ≮ 120 purpose coal dusts with coal, transported to preheating type burner 7 with a wind that self produces automatically by coal chute 6; Coal dust behind high-temp combustion and gasification reaction, tangentially sprays into realization completing combustion in the boiling hot-blast stove 9 with half vaporized state in burner; The flyash that combustion process produces, major part is discharged voluntarily by the bottom, and part is discharged under the cooperation of dedusting air blast 11 through hot blast deduster 10 with flue gas; Enter in the drying tower with flue gas on a small quantity in addition.

This system architecture compactness, cost is low.Preheating type burner 7 can burn hot-blast stove as oil or gas, with the oily cotton yarn point free adjustment furnace temperature of fighting.The design of burner hearth slagging device of Boiling Combustion stove 9 and selecting for use of fan mill make the fuel of system all finish automatically continuously under closed state from the overall processes such as burning, deslagging that join of coal cinder.

During operation, combustion air tangentially enters preheating type burner 7, fully mixes with wind and coal dust and strengthens its swirl strength, causes local decompression at the precombustion chamber center, forms the recirculating zone, sets up igniting and steady flame condition; Simultaneously, eddy flow increases the coal dust time of staying, at high temperature finishes required burning and gasification reaction, and the semi-coal gas mixture that forms about 1200 ℃ sprays in the boiling hot-blast stove 9.

Table one be do in order to verify the utility model contrived experiment data (moving 20 days continuously), as can be seen from the table, the utlity model has good stable and enough production capacity.

Table one: contrived experiment data

Owing to be provided with hot blast deduster 10, can remove the dust more than 60%.Analysis data shows, not only granularity is relatively large through dust that hot blast deduster 10 is removed, and the Unit Weight phosphorus content also is to enter 2 times of dust in the drying tower, and glaze for glazed tile burn till be afraid of most be exactly in the raw material phosphorus content too high.As seen, hot blast deduster 10 not only can be removed most dust in the hot blast, and bigger to the product quality influence exactly high larger particles of removing of phosphorus content.As seen, the effect that hot blast deduster 10 is set is fairly obvious, has further guaranteed product quality, and has reduced the possibility of pollution on the environment.

Also be provided with sealing ash storage chamber between drying tower 12 and the boiling hot-blast stove 9, the dust that disposes through described hot blast deduster is collected by sealing ash storage chamber, can carry out the secondary utilization, such as being used for doing flyash brick.

In order further to reduce influence to environment, on drying tower 12, also be provided with fume extractor, it comprises cyclone dust collectors, fountain hydrofilter and chimney.

According to record and data analysis, during normal ignition, have approximately the not combustion of 6-8kg or not fully the coal dust of after-flame discharge from chimney, but because the number of times few (average month is no more than twice) of pulverized coal hot air furnace cold conditions igniting, therefore, influence that can be very not big to environment structure.

When the pulverized coal hot air furnace system normally moves, the flue gas that burning produces will be discharged through following path, that is: droplet mixed flow collision heat exchange → cyclone dust collectors → fountain hydrofilter → chimney of flue gas → hot blast deduster of producing of burning → form with a large amount of ceramic raw materials in drying tower is discharged.So far, the flue gas of discharge had not both had a little black smoke, nitrogen oxide (NO3) also seldom, its dust emissions amount drops to minimum, reaches the national environmental protection requirement.

Above embodiment is an exemplary embodiment of the present utility model only, is not used in restriction the utility model, and protection domain of the present utility model is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the utility model in essence of the present utility model and protection domain, this modification or be equal to replacement and also should be considered as dropping in the protection domain of the present utility model.

Claims (5)

1. spray dryer pulverized coal hot air furnace system, comprise broken conveyer, fixed magnetic separation sieve, bucket elevator, coal store, coal pulverizer, coal chute, preheating type burner, combustion-supporting air blast, boiling hot-blast stove and drying tower, it is characterized in that, be provided with hot blast deduster and dedusting air blast between described drying tower and the described boiling hot-blast stove.
2. spray dryer pulverized coal hot air furnace according to claim 1 system is characterized in that also be provided with fume extractor on the described drying tower, described fume extractor comprises cyclone dust collectors, fountain hydrofilter and chimney.
3. spray dryer pulverized coal hot air furnace according to claim 1 system is characterized in that described coal pulverizer is a fan-type.
4. according to the described spray dryer pulverized coal hot air furnace of one of claim 1 to 3 system, it is characterized in that, also be provided with the UTILIZATION OF VESIDUAL HEAT IN passage around the described boiling hot-blast stove.
5. according to the described spray dryer pulverized coal hot air furnace of one of claim 1 to 3 system, it is characterized in that, also be provided with sealing ash storage chamber between described drying tower and the described boiling hot-blast stove, the dust that the described hot blast deduster of described sealing ash storage chamber's collection process disposes.
CN2009202372889U 2010-07-30 2010-07-30 Coal dust hot-air furnace system of spray dryer CN201666719U (en)

Priority Applications (1)

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CN2009202372889U CN201666719U (en) 2010-07-30 2010-07-30 Coal dust hot-air furnace system of spray dryer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202372889U CN201666719U (en) 2010-07-30 2010-07-30 Coal dust hot-air furnace system of spray dryer

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102705854A (en) * 2012-05-23 2012-10-03 中材高新材料股份有限公司 Energy conversation and environment friendly combustion heating system
CN104759464A (en) * 2015-03-18 2015-07-08 江苏盖亚环境工程有限公司 Polluted soil thermal-desorption repairing system
CN105090939A (en) * 2015-08-11 2015-11-25 湖南华银能源技术有限公司 Hot blast heater recycling low-heating-value gas and combustion method
CN106017053A (en) * 2016-07-28 2016-10-12 合肥三伍机械有限公司 Drying-machine heat supplying system with biofuel
CN107462028A (en) * 2017-07-21 2017-12-12 河南科威阻燃新材料有限公司 A kind of drying system and technique of dustless microcapsule coated red phosphorus combustion inhibitor
CN108105798A (en) * 2017-12-15 2018-06-01 宁夏科豪陶瓷有限公司 A kind of spray drying Tower System
WO2019236071A1 (en) * 2018-06-05 2019-12-12 Economy Mud Products Company Process for making and using a composition of matter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102705854A (en) * 2012-05-23 2012-10-03 中材高新材料股份有限公司 Energy conversation and environment friendly combustion heating system
CN104759464A (en) * 2015-03-18 2015-07-08 江苏盖亚环境工程有限公司 Polluted soil thermal-desorption repairing system
CN105090939A (en) * 2015-08-11 2015-11-25 湖南华银能源技术有限公司 Hot blast heater recycling low-heating-value gas and combustion method
CN106017053A (en) * 2016-07-28 2016-10-12 合肥三伍机械有限公司 Drying-machine heat supplying system with biofuel
CN107462028A (en) * 2017-07-21 2017-12-12 河南科威阻燃新材料有限公司 A kind of drying system and technique of dustless microcapsule coated red phosphorus combustion inhibitor
CN108105798A (en) * 2017-12-15 2018-06-01 宁夏科豪陶瓷有限公司 A kind of spray drying Tower System
WO2019236071A1 (en) * 2018-06-05 2019-12-12 Economy Mud Products Company Process for making and using a composition of matter

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Granted publication date: 20101208

Termination date: 20130730