CN103939925B - In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler - Google Patents
In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler Download PDFInfo
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- CN103939925B CN103939925B CN201410141135.XA CN201410141135A CN103939925B CN 103939925 B CN103939925 B CN 103939925B CN 201410141135 A CN201410141135 A CN 201410141135A CN 103939925 B CN103939925 B CN 103939925B
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Abstract
The invention discloses a kind of In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler, including steel ball deashing device and solution rinser.Steel ball deashing device includes steel ball spreading gear, steel ball separates and collects device, material collecting device and steel ball mechanical transport device, and steel ball spreading gear includes sowing collection bucket, air-cooled sows ball, pearl ash bolter and ash bin；Steel ball separates and collects device and includes cone-shaped collection bucket, ash pearl segregation section and blast pipe；Solution rinser includes solution preparation pond, water pump, steel pipe, rotary nozzle and material collecting device.Two kinds of deashing devices are combined by the present invention, complement each other, its apparatus structure is simple, reliable, can effectively remove the dust that density is light, fine size, Electrostatic Absorption are strong, specific surface area is big, intermolecular absorption affinity is strong, thus reaching the purpose of waste heat boiler steady-state operation, automatic and effective deashing.
Description
Technical field
The invention belongs to ferroalloy and produce flue gas heat recovery field, relate to ash cleaner for exhaust-heating boiler in a kind of mineral hot furnace afterheat generating system.
Background technology
Mineral hot furnace occupies very important status in industrial furnace system, and China is the first in the world ferroalloy big producing country, and within 2013, national ferroalloy yield breaks through 30,000,000 tons, accounts for World Ferroalloy total output more than half.China's the ferroalloy industry about 90% product adopts mineral hot furnace electrothermal way to produce, and energy resource consumption is higher, is the key industry of national energy-saving reduction of discharging.The power consumption of mineral hot furnace accounts for the 2% of national generating capacity, and power consumption receives much concern.Mineral hot furnace cogeneration technology is the power-saving technology that a country actively encourages to widely popularize, and not only saves the energy, is more beneficial for environmental conservation.
Mineral hot furnace, also known as " burried arc furnace ", it is primarily referred to as the electric furnace for producing the products such as metallic silicon, Antaciron, silicomangan, carbide, the flue-gas temperature of this mineral hot furnace waste heat boiler fluctuates within the scope of 300-800 DEG C, dust content is big, major part dust diameter is less than 0.5 μm, and dust has that density is little, the characteristic of high adsorption capacity between Electrostatic Absorption, microgranule and not free settling, additionally, due in ash containing SiO2、MgO、CaO、Fe2O3、Al2O3, the nano_scale particle such as C, these microgranules 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 dramatic drop-off of heat-transfer surface, have a strong impact on the heat recovery of flue gas.The deashing device of current mineral hot furnace waste heat boiler heating surface, mainly has vibration dust-cleaning, brusher deashing, steam (air) soot blowing 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, arranging notch cuttype ash disposal brush between heat-exchanging tube bundle, these ash disposal brushes move back and forth between heat exchanger tube and carry out deashing, but ash disposal brush easily weares and teares, and service life is short, it is necessary to often change.So not only cost is high, also has a strong impact on the work efficiency of whole waste heat boiler.
2, mechanical rapping cleaning dust
Its operation principle is periodically to be impacted by beater and the bar that shakes of heating surface close contact, makes heating surface tube group form body vibration, and vibrating machine ripple is along heating surface pipe transfers to each geometric point, thus reaching dedusting purpose.Its advantage is the generation of mechanical wave, is delivered on time and Spatial Dimension and is evenly distributed, ash for bigger microgranule, loose class, cement dust in kiln heat recovery boiler, there is extremely good dust removing effects, being widely used, shortcoming is the high adsorption capacity between nanoscale, bonding capacity is good, Electrostatic Absorption and microgranule, free settling class dust ash-removal effect is not poor.
3, compression air or high steam purge deashing
Purge to heating surface space input compression air or high steam at set intervals, reach to remove the effect of fouling of heating surface.Its shortcoming is: can not deashing continuously, very big in the different parts dust removing effects difference of heating surface, there is a lot of blind area；Input substantial amounts of cold air or steam, have a strong impact on the thermal efficiency of boiler；Wind at a high speed or steam are to pressing close to the active force having compacting to compress in the above-mentioned ash of tube wall；Substantial amounts of compression air or steam will consume the substantial amounts of energy, very uneconomical.
4, sound wave ashing
Input the sound wave of certain frequency at set intervals to heating surface space, to flue gas stream with stronger disturbance, reach to remove the effect of fouling of heating surface.Its shortcoming is: can not deashing continuously, very big in the different parts dust removing effects difference of heating surface, there is a lot of blind area, and owing to boiler negative pressure is relatively big, a large amount of cold air can be brought into during input sound wave, have a strong impact on the thermal efficiency of boiler；The heating surface of different parts differs greatly because vibrating the applied stress value caused, and its anti-fatigue life is different.
5, explosion, shock-wave ash-clearing
Its principle is similar with sound wave ashing, simply produces outburst shock wave with the explosive combustion of a certain amount of fuel and replaces sound wave, equally exists disadvantages mentioned above, and the more difficult control of explosive force, local heating 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 provided with a steel ball spreading device, is arranged below steel ball at furnace bottom ash bucket and separates and collects device and carry out deashing.This invention is disadvantageous in that: the irregular dust stratification skewness easily caused on heating surface of the steel ball sowing of this device, and long-play can occur local dust stratification to form bulk, and steel ball is bonded in dust stratification and stays in boiler, cause heating surface actual effect.Additionally, the air door set by segregation apparatus collected by steel ball is control to open and close by negative pressure and steel ball lock wind apparatus, this design causes air door intermittent starting, the cleaning air quantity entering segregation section can not continuously enter, pearl ash segregation section ash is caused to be enriched with, outlet can be blocked time serious, affect steel ball deashing device and run.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, and provide a kind of clean based on steel ball impact, liquid solution be auxiliary soot cleaning system and device to solve the fouling of heating surface problem of mineral hot furnace waste heat boiler, thus realizing continuous, stable, economic, reliably and effectively deashing.
For realizing object above, the present invention takes techniques below scheme:
In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler, including steel ball deashing device and solution rinser, steel ball deashing device includes steel ball spreading gear, steel ball separates and collects device, material collecting device and steel ball mechanical transport device, and described steel ball spreading gear includes sowing collection bucket, air-cooled sows ball, pearl ash bolter and ash bin；Pearl ash bolter is arranged on to be sowed between collection bucket and ash bin；Described steel ball separates and collects device and includes cone-shaped collection bucket, ash pearl segregation section and blast pipe, and blast pipe is arranged on ash pearl segregation section, and the bottom of ash pearl segregation section connects material collecting device；Solution rinser includes solution preparation pond, water pump, steel pipe, rotary nozzle and described material collecting device, and described solution preparation pond, water pump, steel pipe and rotary nozzle are sequentially connected with, the top that described rotary nozzle is arranged in waste heat boiler each section of snakelike heat exchange tube.
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.
It is provided with adjustment valve between water pump and the rotary nozzle of described solution rinser.
Described steel ball separates and collects device and also includes baffle plate, and baffle plate is arranged on the smoke outlet of waste heat boiler.
Compared with prior art, this combination type deashing device can reliably and efficiently remove the dust that this density is light, fine size, Electrostatic Absorption are strong, specific surface area is big, intermolecular absorption affinity is strong to the present invention.Steel ball deashing device simple in construction, 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, automatic pearl ash from, automatically sow, automatically clean steel ball, the purpose of waste heat boiler automatic ash-removing can be realized, but the irregular dust stratification skewness easily caused on heating surface of the steel ball sowing of device, long-play can occur local dust stratification to form bulk, steel ball is bonded in dust stratification and stays in boiler, cause that heating surface lost efficacy；Solution rinser well compensate for waste heat boiler and operates for a long time and the situation that internal dust stratification is difficult to clean off unavoidably occur, and is cleaned by blowing out, it may be achieved thoroughly remove boiler internal dust stratification.The combination of two kinds of deashing devices, complements each other, thus reaching the purpose of waste heat boiler steady-state operation, automatic and effective deashing.This invention is implemented in the done engineering project of our company, and ash-removal effect is notable.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention.
Detailed description of the invention
As it is shown in figure 1, the present invention is mainly made up of waste heat boiler, steel ball deashing device and solution rinser three the three big parts that are mutually related.
Waste heat boiler: include 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 framework being made up of column and crossbeam.Support 7 is provided with drum 4, is provided with flow through shaft 3 in support 7, flow through shaft 3 is made up of housing 1, gas approach 5, exhanst gas outlet 6.Wherein, the housing 1 to flow through shaft 3 is furnace wall, namely sets insulation material in the middle of inside and outside two-layer backplate, and such as calcium silicate board, alumina silicate fiber felt or rock wool etc., inner casing is provided with refractory concrete towards the side in furnace wall.Flow through shaft shell one end is connected 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: by steel ball mechanical transport device A, steel ball spreading gear B, steel ball separates and collects device C and steel ball lock wind device for discharging D tetra-part is constituted.Wherein, steel ball mechanical transport device A of the present invention includes drivewheel 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 includes sowing collection bucket B1, air-cooled sows ball B2, pearl ash bolter (net) B3 and ash bin B4；Steel ball separates and collects device C and includes cone-shaped collection bucket C1, ash 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 separates and collects device C and is arranged on below furnace bottom ash bucket, separates and collects at steel ball spreading gear B and steel ball and is provided with circulating steel ball mechanical transport device A between device C.Especially, pearl ash bolter (net) B3 is added on the one hand on steel ball spreading gear B, pearl ash bolter (net) B3 is arranged on furnace roof and sows on a sidewall of collection bucket B1, steel ball and floating ash are toppled over to broadcast sowing to fall from steel ball totebox A5 and are gradually disengaged along pearl ash bolter, steel ball impact exit send out ball (cone), thrown to boiler heating surface thus sowing, and floating ash leaks down from pearl ash bolter (net) B3, falls into the ash bin B4 being arranged on bottom.On the other hand, the grey pearl segregation section C2 separating and collecting device C at steel ball is provided with blast pipe C3, to ensure that cleaning wind continuously enters.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, it is prevented that steel ball collision rolls out from blast pipe.Solution rinser E: include solution preparation pond E1, water pump E2, pressure 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 on the vacant lot near boiler, by pressure steel pipe E3 by the solution prepared rotary nozzle E5 above water pump E2 is transported to and is arranged in boiler each section of snakelike heat exchange tube, pressure steel pipe E2 is routed to each design attitude along boiler exterior support 7, and every layer of rotary nozzle E5 arranges opening/shutting valve E4 respectively outside boiler.When boiler rinses, being pulled down by the steel ball lock wind feeding device D connected by flange 8, replace with drain pipe E6, produced lixivium is discharged into lixivium collecting pit E7 by drain pipe E6.
The operation principle of the present invention is: mineral hot furnace high-temperature dust-containing flue gas enters boiler convection vertical shaft 3 from gas approach 5, sequentially passes through each section of heat exchanger from top to bottom, flue gas heat passes to water or the steam of heating surface, discharges finally by exhanst gas outlet 6.Ash-laden gas can pollute heating surface in the process, 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 big mechanical transport blood circulation, system is constantly collecting isolated steel ball from boiler bottom, transport is to the top of boiler, the steel ball screening out floating ash through pearl ash bolter is uniformly sowed 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 of lower portion thereof and separates and collects device C, soot particle is taken out of by exhanst gas outlet 6 by the air sucked by blast pipe C3 under boiler suction function, through pearl ash from after steel ball then enter bottom steel ball lock wind feeding device D, it is loaded in the steel ball totebox A5 hung on chain, again it is transported to furnace roof, so dust on circulation cleaning boiler heating surface.
Waste heat boiler is through running for a long time, on heating surface, dust stratification aggravates gradually unavoidably, the gap that additionally steel ball can more or less be deposited between heat exchanger tube because of dust stratification cannot fall, cause that residual heat boiler for exchanging heat effect reduces, inner flue gas of the stove resistance substantially increases, and is now accomplished by blowing out and steel ball deashing device out of service is carried out.It is reduced to after room temperature until in-furnace temperature, starts solution rinser, need before startup first to be unloaded by the steel ball lock wind feeding device D under flange 8, change drain pipe E6；Solution preparation pond prepares chemical solution, open water pump E2 and open and close valve E4, dust stratification on heat exchanger tube just can be rinsed out by rotated shower nozzle E5 by solution, clean and must first successively clean from bottom to top, successively clean from top to bottom again, just can terminate until bottom drain pipe E6 cleans after continuing to flow out the liquid solution of clean cleaning.
Cleaning terminates, and just can run steel ball deashing device and open stove after waste heat boiler inner drying.
Claims (5)
1. In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler, including steel ball deashing device and solution rinser, it is characterized in that, steel ball deashing device includes steel ball spreading gear, steel ball separates and collects device, material collecting device and steel ball mechanical transport device, and described steel ball spreading gear includes sowing collection bucket, air-cooled sows ball, pearl ash bolter and ash bin；Pearl ash bolter is arranged on to be sowed between collection bucket and ash bin；Described steel ball separates and collects device and includes cone-shaped collection bucket, ash pearl segregation section and blast pipe, and blast pipe is arranged on ash pearl segregation section, and the bottom of ash pearl segregation section connects material collecting device；Solution rinser includes solution preparation pond, water pump, steel pipe, rotary nozzle and described material collecting device, and described solution preparation pond, water pump, steel pipe and rotary nozzle are sequentially connected with, the top that described rotary nozzle is arranged in waste heat boiler each section of snakelike heat exchange tube.
2. In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler according to claim 1, it is characterised 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, it is characterised 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, it is characterised in that be provided with adjustment valve between water pump and the rotary nozzle of described solution rinser.
5. according to the In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler one of Claims 1-4 Suo Shu, it is characterised in that described steel ball separates and collects device and also includes baffle plate, and baffle plate is arranged on the smoke outlet of waste heat boiler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410141135.XA CN103939925B (en) | 2014-04-08 | 2014-04-08 | In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler |
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| CN201410141135.XA CN103939925B (en) | 2014-04-08 | 2014-04-08 | In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler |
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| CN103939925B true CN103939925B (en) | 2016-07-06 |
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| CN105976943B (en) * | 2016-04-28 | 2017-08-29 | 杭州富通电线电缆有限公司 | A kind of coaxial cable production technology |
| CN107166351A (en) * | 2017-06-27 | 2017-09-15 | 四川东华锅炉工程技术有限公司 | A kind of heat recovery boiler device with vertical well gas flue structure |
| CN108006674A (en) * | 2017-11-20 | 2018-05-08 | 江苏太湖锅炉股份有限公司 | The device of boiler ash removal |
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| CN102441307A (en) * | 2011-11-09 | 2012-05-09 | 铜陵康达铝合金制品有限责任公司 | Smelting furnace exhaust gas filtering system |
| CN203757745U (en) * | 2014-04-08 | 2014-08-06 | 南京凯盛开能环保能源有限公司 | Waste heat boiler ash removal device for iron alloy submerged arc furnace |
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2014
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH043233U (en) * | 1990-04-24 | 1992-01-13 | ||
| JPH07158825A (en) * | 1993-12-02 | 1995-06-20 | Tokyo Gas Co Ltd | Apparatus for cleaning thermal storage bodies of alternate combustion burner |
| CN1186546A (en) * | 1995-05-30 | 1998-07-01 | 克莱德-贝格曼有限公司 | Water jet blast with shortened water lance |
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