CN203757745U - Waste heat boiler ash removal device for iron alloy submerged arc furnace - Google Patents
Waste heat boiler ash removal device for iron alloy submerged arc furnace Download PDFInfo
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- CN203757745U CN203757745U CN201420167399.8U CN201420167399U CN203757745U CN 203757745 U CN203757745 U CN 203757745U CN 201420167399 U CN201420167399 U CN 201420167399U CN 203757745 U CN203757745 U CN 203757745U
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- steel ball
- ash
- waste heat
- dust
- heat boiler
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Abstract
The utility model provides a waste heat boiler dust removal device for an iron alloy submerged arc furnace. The waste heat boiler dust removal device comprises a steel ball dust removal device and a solution cleaning device. The steel ball dust removal device comprises a steel ball spreading device, a steel ball separating collecting device, a material receiving device and a steel ball mechanical conveying device. The steel ball spreading device comprises a spreading collecting bucket, an air cooling spreading ball, a bead dust separating screen and a dust bin. The steel ball separating collecting device comprises a cone-shaped collecting bucket, a dust and bead separation section and an inlet air pipe. The solution cleaning device comprises a solution preparation pool, a water pump, a steel pipe, a rotating spray head and a material receiving device. Two dust removal devices are combined and supplement each other, the waste heat boiler dust removal device is simple in structure, runs reliably and can effectively eliminate dust which is light in density, thin in particle size, high in electrostatic adsorption, large in specific surface area and high in intermolecular adsorption force, and accordingly the goal of enabling a waste heat boiler to run stably and automatically and effectively removing the dust is achieved.
Description
Technical field
The utility model belongs to ferroalloy and produces flue gas heat recovery field, relates to ash cleaner for exhaust-heating boiler in a kind of mineral hot furnace afterheat generating system.
Background technology
Mineral hot furnace is occupied very important status in industrial furnace system, and China is the first in the world ferroalloy big producing country, and within 2013, national ferroalloy output breaks through 3,000 ten thousand tons, accounts for the over half of World Ferroalloy total output.China's the ferroalloy industry 90% left and right product adopts mineral hot furnace electrothermal way to produce, and energy resource consumption is higher, is the key industry that national energy-saving reduces discharging.The power consumption of mineral hot furnace accounts for 2% of national generating capacity, and power consumption receives much concern.Mineral hot furnace cogeneration technology is that a country actively encourages the power-saving technology of wideling popularize, and not only saves the energy, is more conducive to environmental protection.
Mineral hot furnace, claim again by " burried arc furnace ", it mainly refers to the electric furnace for the production of products such as metallic silicon, Antaciron, silicomangan, calcium carbides, the flue-gas temperature of this mineral hot furnace waste heat boiler fluctuates within the scope of 300-800 DEG C, dust content is large, most of dust diameter is less than 0.5 μ m, and dust has that density is little, high adsorption capacity between Electrostatic Absorption, particulate and the characteristic of free settling not, in addition owing to containing SiO in ash
2, MgO, CaO, Fe
2o
3, Al
2o
3, the nano_scale particle such as C, these particulates present different caking property under different humidity provinces and humidity, are very easily attached on the heat exchanger tube in boiler, cause the heat exchange efficiency of heat-transfer surface sharply to reduce, and have a strong impact on the heat recovery of flue gas.The at present deashing device of mineral hot furnace waste heat boiler heating surface, mainly contains vibration dust-cleaning, brusher deashing, steam (air) and blow ash and shock-wave ash-clearing etc., but every kind of ash removal method has certain limitation:
1, brusher deashing
In order to remove the dust stratification on heat exchanger tube, notch cuttype ash disposal brush is set between heat-exchanging tube bundle, these ash disposal brushes move around and carry out deashing between heat exchanger tube, but the easily wearing and tearing of ash disposal brush, service life is short, need to often change.So not only cost is high, also has a strong impact on the operating efficiency of whole waste heat boiler.
2, mechanical rapping cleaning dust
Its operation principle is periodically to impact and the bar that shakes of heating surface close contact by beater, makes heating surface tube group form body vibration, and vibrating machine ripple is along heating surface pipe transfers to each geometric point, thereby reaches dedusting object.Its advantage be mechanical wave generation, be delivered on time and Spatial Dimension and be evenly distributed, for the ash of larger particulate, loose class, as the cement dust in kiln heat recovery boiler, there is extremely good dust removing effects, be widely used, shortcoming is high adsorption capacity between, Electrostatic Absorption good to nanoscale, bonding capacity and particulate, free settling class dust ash-removal effect is not poor.
3, compressed air or high steam purge deashing
Purge to heating surface space input compressed-air or high steam at set intervals, reach the effect of removing fouling of heating surface.Its shortcoming is: deashing continuously, and very large in the different parts dust removing effects difference of heating surface, there are a lot of blind areas; Input a large amount of cold air or steam, had a strong impact on the thermal efficiency of boiler; Wind at a high speed or steam are to pressing close to the active force that has compacting to compress in the above-mentioned ash of tube wall; A large amount of compressed air or steam are by consuming a large amount of energy, very uneconomical.
4, sound wave ashing
To the sound wave of heating surface space input certain frequency, give smoke gas flow with stronger disturbance at set intervals, reach the effect of removing fouling of heating surface.Its shortcoming is: deashing continuously, and very large in the different parts dust removing effects difference of heating surface, there are a lot of blind areas, and because boiler negative pressure is larger, when input sound wave, can bring a large amount of cold airs into, have a strong impact on the thermal efficiency of boiler; The heating surface of different parts differs greatly because vibrating the applied stress value causing, its anti-fatigue life difference.
5, explosion, shock-wave ash-clearing
Its principle and sound wave ashing are similar, just produce outburst shock wave with the explosive combustion of a certain amount of fuel and replace sound wave, have equally above-mentioned shortcoming, and the more difficult control of explosive force, and local heating's face is easily damaged.
Chinese invention patent " residual heat boiler of steel ball dedusting type ore heat furnace ", publication number is 101701775A, adopts furnace roof to be furnished with a steel ball and disseminates device, steel ball separated and collected device is set below furnace bottom ash bucket and carries out deashing.The weak point of this invention is: the irregular dust stratification skewness easily causing on heating surface of steel ball sowing of this device, and can there is local dust stratification and form bulk in long-play, and steel ball is bonded in dust stratification and stays in boiler, causes heating surface actual effect.In addition, it is to control keying by negative pressure and steel ball lock wind apparatus that steel ball is collected the set air door of separator, this design causes air door intermittent starting, the cleaning air quantity that enters segregation section can not enter continuously, cause the enrichment of pearl ash segregation section ash, when serious, can stop up outlet, affect the operation of steel ball deashing device.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a kind of impact to clean as auxiliary soot cleaning system and device as main, liquid solution taking steel ball solve the fouling of heating surface problem of mineral hot furnace waste heat boiler, thereby realize continuously, stable, economic, deashing reliably and effectively.
For realizing above object, the utility model is taked following technical scheme:
In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler, comprise steel ball deashing device and solution cleaning device, steel ball deashing device comprises steel ball spreading gear, steel ball separated and collected device, material collecting device and steel ball mechanical transport device, and described steel ball spreading gear comprises sows collection bucket, air-cooled ball, pearl ash bolter and the ash bin sowed; Pearl ash bolter is arranged on to be sowed between collection bucket and ash bin; Described steel ball separated and collected device comprises cone-shaped collection bucket, grey pearl segregation section and blast pipe, and blast pipe is arranged on grey pearl segregation section, and the bottom of grey pearl segregation section connects material collecting device; Solution cleaning device comprises solution preparation pond, water pump, steel pipe, rotary nozzle and described material collecting device, described solution preparation pond, water pump, steel pipe and rotary nozzle connect successively, and described rotary nozzle is arranged on the top of each section of snakelike heat exchange tube in waste heat boiler.
Described material collecting device is steel ball lock wind device for discharging or lixivium collecting pit.
Described blast pipe is arranged on the tube wall surrounding of pearl ash segregation section, and tube bank is arranged obliquely along cone-shaped collection bucket outer wall.
Between the water pump of described solution cleaning device and rotary nozzle, be provided with control valve.
Described steel ball separated and collected device also comprises baffle plate, and baffle plate is arranged on the smoke outlet of waste heat boiler.
Compared with prior art, this combined type deashing device can remove that this density is light to the utility model reliably, effectively, fine size, Electrostatic Absorption is strong, specific area is large, intermolecular absorption affinity is strong dust.Steel ball deashing device is simple in structure, reliable, whole ash disposal system is only under the effect of a motor, can complete steel ball circulation transport, automatic discharging, automatic overturning steel ball, automatically pearl ash content from, automatically sow, automatically clean steel ball, can realize the object of waste heat boiler automatic ash-removing, but the irregular dust stratification skewness easily causing on heating surface of steel ball sowing of device, can there is local dust stratification and form bulk in long-play, steel ball is bonded in dust stratification and stays in boiler, causes heating surface to lose efficacy; Solution cleaning device has well made up waste heat boiler and has turned round for a long time and unavoidably occur that inner dust stratification is difficult to the situation of removing, and cleans by blowing out, can realize thorough removing boiler internal dust stratification.Two kinds of deashing device combinations, complement each other, thereby reach the object of waste heat boiler steady-state operation, automatic and effective deashing.This utility model is implemented in engineering project is done by our company, and ash-removal effect is remarkable.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model device.
Detailed description of the invention
As shown in Figure 1, the utility model is mainly made up of waste heat boiler, steel ball deashing device and three of the solution cleaning devices three large parts that are mutually related.
Waste heat boiler: comprise housing 1, snakelike heat exchange tube 2, to flow through shaft 3, drum 4, gas approach 5, exhanst gas outlet 6, support 7 and flange 8.Support 7 is the frameworks that are made up of column and crossbeam.On support 7, be provided with drum 4, in support 7, be provided with flow through shaft 3, flow through shaft 3 is made up of housing 1, gas approach 5, exhanst gas outlet 6.Wherein, be furnace wall to the housing 1 of flow through shaft 3, in the middle of inside and outside two-layer backplate, establish insulation material, as calcium silicate board, alumina silicate fiber felt or rock wool etc., the side of inner casing in furnace wall is provided with refractory concrete.Flow through shaft housing one end is connected to gas approach 5, and the other end connects exhanst gas outlet 6.Snakelike heat exchange tube 2 is arranged in flow through shaft 3 according to heat exchange designing requirement.
Steel ball deashing device: formed by steel ball mechanical transport device A, steel ball spreading gear B, steel ball separated and collected device C and steel ball lock wind device for discharging D tetra-parts.Wherein, steel ball mechanical transport device A described in the utility model comprises driving wheel A1, driven pulley A2, double strand chain A3, horizontal guide rail A4, steel ball totebox A5, mechanical discharging gear wheel A6, chain stretching device A7 and steel ball A8; Steel ball spreading gear B comprises and sows collection bucket B1, air-cooled ball B2, pearl ash bolter (net) B3 and the ash bin B4 of sowing; Steel ball separated and collected device C comprises cone-shaped collection bucket C1, grey pearl segregation section C2, blast pipe C3 and baffle plate C4.
Steel ball deashing device is arranged in inside and outside waste heat boiler framework, steel ball spreading gear B is arranged on furnace roof, steel ball separated and collected device C is arranged on furnace bottom ash bucket below, is provided with circulating steel ball mechanical transport device A between steel ball spreading gear B and steel ball separated and collected device C.Especially, on steel ball spreading gear B, increase on the one hand pearl ash bolter (net) B3, pearl ash bolter (net) B3 is arranged on furnace roof and sows on a sidewall of collection bucket B1, steel ball is toppled over to broadcast sowing to fall along pearl ash bolter from steel ball totebox A5 with floating ash and is separated gradually, what steel ball impacted exit sends out ball (cone), thereby sowed and throw to boiler heating surface, and floating ash leaks down from pearl ash bolter (net) B3, falls into the ash bin B4 that is arranged on bottom.On the other hand, be provided with blast pipe C3 at the grey pearl segregation section C2 of steel ball separated and collected device C, to ensure that cleaning wind enters continuously.Blast pipe C3 is arranged on the tube wall surrounding of pearl ash segregation section C2, and tube bank is arranged obliquely along cone-shaped collection bucket C1 outer wall, prevents that steel ball collision from rolling out from blast pipe.Solution cleaning device E: comprise solution preparation pond E1, water pump E2, withstand voltage steel pipe E3, opening/shutting valve E4, rotary nozzle E5, drain pipe E6 and lixivium collecting pit E7.Solution preparation pond E1, lixivium collecting pit E7 and water pump E2 are arranged near vacant lot boiler, by withstand voltage steel pipe E3, prepared solution is transported to the rotary nozzle E5 that is arranged on each section of snakelike heat exchange tube top in boiler through water pump E2, withstand voltage steel pipe E2 is routed to each design attitude along boiler outside support 7, and every layer of rotary nozzle E5 arranges opening/shutting valve E4 outward at boiler respectively.When boiler rinses, the steel ball lock wind feeding device D connecting by flange 8 is pulled down, replace with drain pipe E6, the lixivium producing discharges into lixivium collecting pit E7 by drain pipe E6.
Operation principle of the present utility model is: mineral hot furnace high-temperature dust-containing flue gas enters boiler to flow through shaft 3 from gas approach 5, passes through successively each section of heat exchanger from top to bottom, flue gas heat is passed to water or the steam of heating surface, finally discharges by exhanst gas outlet 6.In this process, ash-laden gas can pollute heating surface, and the outer surface bonding ash of heating surface is removed on the effective operation ground of steel ball deashing device, ensures waste heat boiler ground steady production.Steel ball deashing device is a large mechanical transport circulatory system, system is constantly collect isolated steel ball from boiler bottom, be transported to the top of boiler, screening out floating grey steel ball through pearl ash bolter evenly sows on boiler heating surface by spreading gear, steel ball is beated from top to bottom between heating surface, constantly decline, final sum part soot particle falls into the steel ball separated and collected device C of boiler bottom, the air being sucked by blast pipe C3 is taken out of soot particle under boiler suction function by exhanst gas outlet 6, through pearl ash content from after steel ball enter bottom steel ball lock wind feeding device D, be loaded in the steel ball totebox A5 hanging on chain, again be transported to furnace roof, dust on circulation cleaning boiler heating surface like this.
Waste heat boiler is through operation for a long time, on heating surface, dust stratification aggravates gradually unavoidably, steel ball cannot fall because of the gap that dust stratification can more or less be deposited between heat exchanger tube in addition, cause residual heat boiler for exchanging heat effect to reduce, inner flue gas of the stove resistance obviously increases, and now just needs blowing out and steel ball deashing device out of service to clean.Be reduced to after room temperature until temperature in stove, start solution cleaning device, before startup, need first the steel ball lock wind feeding device D under flange 8 to be unloaded, change drain pipe E6; In solution preparation pond, prepare chemical solution, open water pump E2 and open and close valve 4, solution just can rinse out the dust stratification on heat exchanger tube through rotary nozzle E5, clean and must first successively clean from bottom to top, successively clean from top to bottom again, until clean and just can finish after the clean clean liquid solution of the lasting outflow of bottom drain pipe E6.
Clean and finish, after waste heat boiler inner drying, just can move steel ball deashing device and open stove.
Claims (5)
1. In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler, comprise steel ball deashing device and solution cleaning device, it is characterized in that, steel ball deashing device comprises steel ball spreading gear, steel ball separated and collected device, material collecting device and steel ball mechanical transport device, and described steel ball spreading gear comprises sows collection bucket, air-cooled ball, pearl ash bolter and the ash bin sowed; Pearl ash bolter is arranged on to be sowed between collection bucket and ash bin; Described steel ball separated and collected device comprises cone-shaped collection bucket, grey pearl segregation section and blast pipe, and blast pipe is arranged on grey pearl segregation section, and the bottom of grey pearl segregation section connects material collecting device; Solution cleaning device comprises solution preparation pond, water pump, steel pipe, rotary nozzle and described material collecting device, described solution preparation pond, water pump, steel pipe and rotary nozzle connect successively, and described rotary nozzle is arranged on the top of each section of snakelike heat exchange tube in waste heat boiler.
2. In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler according to claim 1, is characterized in that, described material collecting device is steel ball lock wind device for discharging or lixivium collecting pit.
3. In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler according to claim 1, is characterized in that, described blast pipe is arranged on the tube wall surrounding of pearl ash segregation section, and tube bank is arranged obliquely along cone-shaped collection bucket outer wall.
4. In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler according to claim 1, is characterized in that, between the water pump of described solution cleaning device and rotary nozzle, is provided with control valve.
5. according to the In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler one of claim 1 to 4 Suo Shu, it is characterized in that, described steel ball separated and collected device also comprises baffle plate, and baffle plate is arranged on the smoke outlet of waste heat boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167399.8U CN203757745U (en) | 2014-04-08 | 2014-04-08 | Waste heat boiler ash removal device for iron alloy submerged arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167399.8U CN203757745U (en) | 2014-04-08 | 2014-04-08 | Waste heat boiler ash removal device for iron alloy submerged arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203757745U true CN203757745U (en) | 2014-08-06 |
Family
ID=51253013
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420167399.8U Withdrawn - After Issue CN203757745U (en) | 2014-04-08 | 2014-04-08 | Waste heat boiler ash removal device for iron alloy submerged arc furnace |
Country Status (1)
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| CN (1) | CN203757745U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939925A (en) * | 2014-04-08 | 2014-07-23 | 南京凯盛开能环保能源有限公司 | Waste heat boiler dust removal device of ferroalloy submerged arc furnace |
-
2014
- 2014-04-08 CN CN201420167399.8U patent/CN203757745U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939925A (en) * | 2014-04-08 | 2014-07-23 | 南京凯盛开能环保能源有限公司 | Waste heat boiler dust removal device of ferroalloy submerged arc furnace |
| CN103939925B (en) * | 2014-04-08 | 2016-07-06 | 南京凯盛开能环保能源有限公司 | In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140806 Effective date of abandoning: 20160706 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |