CN101514871A - Heat accumulated type lead-melting furnace - Google Patents
Heat accumulated type lead-melting furnace Download PDFInfo
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- CN101514871A CN101514871A CNA2009101339356A CN200910133935A CN101514871A CN 101514871 A CN101514871 A CN 101514871A CN A2009101339356 A CNA2009101339356 A CN A2009101339356A CN 200910133935 A CN200910133935 A CN 200910133935A CN 101514871 A CN101514871 A CN 101514871A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a heat accumulated type lead-melting furnace, which includes a furnace body, a heat accumulated type combustion system and a automatic combustion control system, wherein the heat accumulated type combustion system mainly includes heat accumulated type burners, a combustion gas pipeline, a smoke evacuation system and a air supplying system, the heat accumulated type burners are arranged at one side of the furnace body in pair, a main pipeline of the combustion gas pipeline extends to heat accumulated type burner tips of the two heat accumulated type burners through a combustion gas reversing valve and two branch pipelines, heat accumulated bodies of the heat accumulated type burners are respectively connected with a blower exhaust pipeline of the air supplying system and a draught fan smoking pipeline of the smoke evacuation system through the pipeline and a triple valve, and the triple valve is used for controlling air inlet or smoke evacuation. The invention can reduce fuel consumption, save energy, reasonably control combustion status in the furnace and increase operation security performance of the furnace.
Description
Technical field
The present invention relates to metal melting equipment, exactly is the heat accumulated type lead-melting furnace that uses in plumbous smelting process.
Background technology
The main technique flow process of existing plumbous smelting process is as follows: the lead ore is smelted---lead bullion---refining of lead bullion prepares anode---electrolysis---founding of negative electrode lead flake---lead pig.At present, the domestic main plumbous producer that smelts all uses market pot to come melting in processes such as the refining of lead bullion, the founding of negative electrode lead flake, negative electrode manufacturing, according to the difference of purposes, can be divided into anode pot, negative electrode pot, electric lead pan, alloy pot etc., at this unified market pot that is referred to as.Its form is the use steel crucibles, by solid, gas, liquid fuel heat crucible, and fusing indirectly.Above-mentioned market pot in use, the defective that ubiquity that exhaust gas temperature height, temperature uniformity are poor, incomplete combustion, control device fall behind, thus cause the energy consumption height, problems such as the thermal efficiency is low, pot life is short, operating environment difference.The index of smelting the plumbous smeltery of group with the Zhuzhou is described as follows:
1) gas unit consumption height, the plumbous gas unit consumption of electricity per ton is about 180~240m
3
2) thermal efficiency is low, only is about 10%;
3) lead pan is short service life, and the life-span generally has only 3~6 months;
4) flue gas loss is big, and the sensible heat loss that flue gas is taken away is up to 50%~60%;
5) loss of the inadequacy burning for chemistry mechanics reason is up to 20%~30%.
Summary of the invention
For overcoming the above problems and defective, the present invention aims to provide a kind of heat accumulated type lead-melting furnace, with reduce fuel consumption, energy savings, rationally control stove internal combustion situation, improve the handling safety performance of stove.
The technical solution used in the present invention is:
A kind of heat accumulated type lead-melting furnace, comprise body of heater, regenerative combustion system and automatic burner control system, described regenerative combustion system is mainly by heat-storage type burner, fuel gas pipeline, smoke evacuation system, air feed system is formed, wherein heat-storage type burner is mounted in pairs in body of heater one side, the trunk line of fuel gas pipeline leads to the heat-accumulating burner of two heat-storage type burners through combustion gas reversal valve and two laterals, the heat storage of heat-storage type burner is respectively through pipeline and triple valve and the air blast wind pipe of air feed system separately, the air-introduced machine smoking pipeline of smoke evacuation system is connected, by triple valve control air inlet or smoke evacuation.
Described smoke evacuation system is made up of main smoke evacuation pipeline, auxiliary smoke evacuation pipeline, flue gas return pipeline three parts, flue gas is extracted out by air-introduced machine in the smoke evacuation pipeline, directly be discharged into chimney, flue gas is directly discharged by auxiliary flue in the auxiliary smoke evacuation pipeline, without heat storage, flue gas is extracted out by air-introduced machine in the flue gas return pipeline, returns in the stove by blower inlet again.
The air supply line of described air blast is provided with flowmeter, Pressure gauge, differential pressure transmitter, electric control valve and hand-operated valve, and the Gas Pipe of fuel gas pipeline is provided with gate valve, eyes valve, flowmeter, Pressure gauge, steam blowing interface, differential pressure transmitter and electric control valve.
Each heat-accumulating burner of described heat-storage type burner all is equipped with a little burner of electronic ignition and detects safety guard by the flame that ultraviolet flame detector and flame relay etc. is formed, and heat storage adopts the aluminium oxide ceramics bead.
Described body of heater outside is a steel construction, mainly is made of column, pull bar, furnace shell and furnace roof operation steel platform.
Described body of heater outside is square, and is inner circular, and home position design castable refractory pot seat is used for supporting the pot body.
The inner setting of described body of heater led the flame wall.
Be provided with two combustion chambers independently mutually in the described body of heater.
Described bottom of furnace body is provided with the lead discharging mouth.
Described automatic burner control system is made up of Programmable Logic Controller and upper industrial computer, and Programmable Logic Controller is connected with upper machine communication, and the working of a furnace information detecting element of lead melting furnace, control element are connected with Programmable Logic Controller.
Described automatic burner control system disposes the execute-in-place case, and upper industrial computer is operated from a distance, and dual mode can be changed mutually.
Heat accumulated type lead-melting furnace of the present invention adopts collection stove internal combustion, flows, diabatic process optimization and waste heat recovery are the regenerative combustion technology of one, the hot physicochemical properties of strict control furnace gas, eliminate localized hyperthermia district in the stove, even fire box temperature, optimize the gas stream in the stove motion, improve the flame degree of filling, strengthen convection current and radiant heat transfer, reduce exhaust gas temperature, reduce the scaling loss of crucible simultaneously.
Description of drawings
Fig. 1 is the fundamental diagram of heat accumulated type lead-melting furnace of the present invention;
Fig. 2 is the structure diagram of heat accumulated type lead-melting furnace of the present invention.
The specific embodiment
The present invention is further detailed explanation below in conjunction with embodiment and accompanying drawing.
Description of reference numerals is as follows:
1---body of heater 2---pot seat
3---crucible 4---combustion gas reversal valve
5,5 '---burner 6,6 '---heat storages
7---triple valve 8---air blast
9---air-introduced machines 10---are assisted flue
11---return flue
As shown in Figure 1, this heat accumulated type lead-melting furnace mainly is made of body of heater 1, regenerative combustion system and automatic burner control system, the outside of body of heater 1 is a steel construction, be made of column, pull bar, furnace shell and furnace roof operation steel platform etc., body of heater 1 outside is square, and is inner rounded, home position design castable refractory pot seat 2 is used for support crucible 3, the inner setting of body of heater led the flame wall, effectively organizes gas stream in the stove, strengthens the heat-transfer effect of flue gas and pot body; Be provided with two combustion chambers independently mutually in the body of heater, fully burn, can avoid flame directly to wash away a pot body simultaneously to guarantee combustion gas; Bottom of furnace body is provided with the lead discharging mouth, and leaking lead can in time discharge out of the furnace; Regenerative combustion system is mainly by heat-storage type burner, fuel gas pipeline, smoke evacuation system, air feed system is formed, wherein heat-storage type burner is mounted in pairs in body of heater one side, can make burning more abundant, fuel savings to greatest extent, the trunk line of fuel gas pipeline leads to the heat-accumulating burner 5 of two heat-storage type burners through combustion gas reversal valve 4 and two laterals, combustion gas reversal valve 4 adopts the single pneumatic actuator that drives of import, drive medium is a compressed air, the machining accuracy height, good airproof performance, be adapted to contain dust, the non-clean fuel gas of tar and the occasion of frequent movement, long service life, having a power failure or stopping compressed-air actuated the time suddenly, can (generation of serious accident be prevented in the supply of 1~2s) fast shut-off combustion gas in advance in the extremely short time; The heat storage 6 of heat-storage type burner is connected with the wind pipe of air feed system air blast 8 separately, the smoking pipeline of smoke evacuation system air-introduced machine 9 through pipeline and triple valve 7 respectively, by triple valve 7 control air inlet or smoke evacuations, the three-way diverter valve heatproof is 200 ℃, the switching interval time is 1~2min/ time, have timing and forced commutation function, long service life; Smoke evacuation system is made up of main smoke evacuation pipeline, auxiliary smoke evacuation pipeline, flue gas return pipeline three parts, flue gas is extracted out by air-introduced machine 9 in the smoke evacuation pipeline, directly be discharged into chimney, flue gas is directly discharged by auxiliary flue 10 in the auxiliary smoke evacuation pipeline, without heat storage, mainly play the effect of alleviating furnace pressure big ups and downs in the commutation process, exhaust smoke level accounts for the 10%-30% of total cigarette amount.The aperture of auxiliary smoke evacuation pipeline is regulated by electronic flue shutter, flue gas is extracted out by air-introduced machine in the flue gas return pipeline, is returned in the stove by blower inlet by returning flue 11 again, plays and reduces the combustion air oxygen content, suppress too high flame combustion temperature, reduce effect pot body scaling loss.
Each heat-accumulating burner of heat-storage type burner all is equipped with an igniting little burner (being ever-burning flame), is used for the startup repeatedly of the big burner of low temperature, and the assurance system normally moves, and adopts electronic ignition mode, can guarantee a fire safety; Flame detects safety guard mainly to be made up of ultraviolet flame detector and flame relay etc., is used for the supervision to flame, when occurring sending control instruction when loss of ignition or fault are stopped working, cuts off the supply of coal gas; Heat storage adopts the aluminium oxide ceramics bead, this heat storage have the dustproof anti-slagging scorification of automatically cleaning, resistance little, be convenient to pull down cleaning, function such as use repeatedly, the heat storage efficiency height, ordinary life guarantees more than 1 year.
The air supply line of air blast is provided with flowmeter, Pressure gauge, differential pressure transmitter, electric control valve and hand-operated valve, the Gas Pipe of fuel gas pipeline is provided with gate valve, the eyes valve, flowmeter, Pressure gauge, differential pressure transmitter and electric control valve, contain dust for use, the occasion of the non-clean fuel gas of tar, in order to improve the dependability of valve on the Gas Pipe, the steam blowing interface is housed on pipeline, regularly purge in managing, remove tar and dust, gate valve and eyes valve are used for the manual by cutting off of combustion gas, electric control valve is used for the motorized adjustment of gas flow, flow-through orifice and differential pressure transmitter are used for the detection of gas flow, and pressure transmitter is used for the detection of gaseous-pressure.
Automatic burner control system adopts import Programmable Logic Controller (PLC) to realize logic control, has disposed industrial computer simultaneously as host computer, and PLC and host computer carry out communication.Control core and on-the-spot detection, executive component have been formed the DCS control system, and the detected element collections of working of a furnace information such as temperature, pressure, flow, valve position are transported to PLC, and show on host computer.Can show instantaneous data, simultaneously also can show and write down cumulative data, set up the configuration picture of stove, react the operation conditions of stove intuitively by software.Operational factor that simultaneously can online adjustment stove is controlled the stove operation easily, is operating as operated from a distance on the host computer in the control room, and simultaneity factor has disposed the execute-in-place case, is used for operating personnel's local operation at the scene.Dual mode can be changed mutually, is convenient to produce actual needs, default automatic running status and manual operation two states.
As shown in Figure 2, when burner 5 work, burner 5 ' play and discharge fume and the accumulation of heat effect; Switch after a period of time, burner 5 ' work, burner 5 play smoke evacuation and accumulation of heat effect.In the course of the work, the mode of 1000 ℃ high-temperature flue gas by radiation and convection heat transfer' heat-transfer by convection in the quite short time, rapidly heat is passed to heat storage 6 ', temperature is reduced to about 150 ℃ and is discharged through cross valve behind the flue gas heat release; Then, by switching, air under the room temperature by rightabout enter burner 5 ', heat storage 6 ' in the mode of heat convection heat is passed to air rapidly again, heat storage 6 ' be cooled, air is preheating to more than 800 ℃, after hot-air after the preheating enters burner hearth, because high velocity jet, form a low-pressure area, take out and draw low speed on every side or static combustion product and form one and contain the oxysome volume concentrations and be significantly less than 21% oxygen deprivation high temperature gas flow, gaseous fuel in nozzle sprays into stove after, the diffusion of high-temperature low-oxygen air-flow mixes therewith, takes place and the diverse high-temperature and low-oxygen combustion of traditional combustion.The triple valve that operating temperature is not high switches with certain frequency, can produce high temperature air continuously in this way, realizes high-temperature and low-oxygen combustion.
The key of this combustion technology is efficient (or claiming the limit) accumulation of heat (utilize the sensible heat preheated burning air of stove combustion gas, can make it to reach more than 800 ℃) and hypoxemia (the combustion zone oxygen concentration is low to moderate 2 ~ 8%) burning.The fuel formed flame that burns in this high-temperature low-oxygen atmosphere is compared and is had following advantage with the formed flame of burning under conventional conditions:
Energy-conservation remarkable: energy-conservation more than 30% with reduction of discharging;
Reduce greenhouse gas emission: reduce discharging more than the CO230%, the NOx concentration of emission is reduced to 30~50ppm;
The fire box temperature uniformity improves greatly.
Heat accumulated type lead-melting furnace of the present invention is compared with market pot is arranged, and effects of energy conservation and environmental protection is very remarkable:
1, energy saving economy remarkable benefit, gas consumption reduces significantly, the plumbous coal gas 120m that saves per ton
3(save 55%, see Table 1);
2, the thermal efficiency increases substantially, and the thermal efficiency is increased to about 50%;
3, heat loss due to exhaust gas reduces significantly, and the tail gas discharge temperature is reduced to 130~170 ℃;
4, complete combustibility improves, and CO content is lower than 50ppm in the tail gas;
5, environment protecting is remarkable, significantly reduces greenhouse gas emission, and the CO2 discharge capacity reduces more than 50%, and tail gas NOX concentration of emission is lower than 80ppm;
6, automatic control level promotes, and labour intensity reduces, and processing safety improves;
7, pot life prolongs 1 times.
Table 1 heat accumulated type lead-melting furnace energy-saving benefit
Sequence number | Content and explanation | Before the transformation | After the transformation | The saving amount |
1 | The plumbous average gas unit consumption of ton | 180~220Nm 3/h | 100Nm 3/h | 120Nm 3/ h, (saving 55%) |
2 | Annual production | 40000t/a | 40000t/a | ___________ |
3 | Year gas consumption amount | 880×10 4Nm 3/h | 400×10 4Nm 3/h | 480×10 4Nm 3/ h (saving 55%) |
4 | The coal gas unit price | 0.3 unit/Nm 3 | 0.3 unit/Nm 3 | ___________ |
5 | Year gas charge is used | 2,640,000 yuan | 1,200,000 yuan | 1,440,000 yuan |
The present invention is not limited to above-mentioned preferred forms, and anyone can draw other various forms of products under enlightenment of the present invention.Though but on its shape or structure, do any variation, every identical with the present invention or akin technical scheme is all within its protection domain.
Claims (10)
1, a kind of heat accumulated type lead-melting furnace, it is characterized in that, comprise body of heater, regenerative combustion system and automatic burner control system, described regenerative combustion system is mainly by heat-storage type burner, fuel gas pipeline, smoke evacuation system, air feed system is formed, wherein heat-storage type burner is mounted in pairs in body of heater one side, the trunk line of fuel gas pipeline leads to the heat-accumulating burner of two heat-storage type burners through combustion gas reversal valve and two laterals, the heat storage of heat-storage type burner is respectively through pipeline and triple valve and the air blast wind pipe of air feed system separately, the air-introduced machine smoking pipeline of smoke evacuation system is connected, by triple valve control air inlet or smoke evacuation.
2, heat accumulated type lead-melting furnace according to claim 1, it is characterized in that, described smoke evacuation system is made up of main smoke evacuation pipeline, auxiliary smoke evacuation pipeline, flue gas return pipeline three parts, flue gas is extracted out by air-introduced machine in the smoke evacuation pipeline, directly be discharged into chimney, flue gas is directly discharged by auxiliary flue in the auxiliary smoke evacuation pipeline, without heat storage, flue gas is extracted out by air-introduced machine in the flue gas return pipeline, returns in the stove by blower inlet again.
3, heat accumulated type lead-melting furnace according to claim 2, it is characterized in that, the air supply line of described air blast is provided with flowmeter, Pressure gauge, differential pressure transmitter, electric control valve and hand-operated valve, and the Gas Pipe of fuel gas pipeline is provided with gate valve, eyes valve, flowmeter, Pressure gauge, steam blowing interface, differential pressure transmitter and electric control valve.
4, heat accumulated type lead-melting furnace according to claim 3; it is characterized in that; each heat-accumulating burner of described heat-storage type burner all is equipped with a little burner of electronic ignition and detects safety guard by the flame that ultraviolet flame detector and flame relay etc. is formed, and heat storage adopts the aluminium oxide ceramics bead.
5, heat accumulated type lead-melting furnace according to claim 4 is characterized in that, described body of heater outside is a steel construction, mainly is made of column, pull bar, furnace shell and furnace roof operation steel platform.
6, heat accumulated type lead-melting furnace according to claim 5 is characterized in that, described body of heater outside is square, and is inner circular, and home position design castable refractory pot seat is used for supporting the pot body.
7, heat accumulated type lead-melting furnace according to claim 6 is characterized in that, described body of heater is inner to be provided with and to lead flame wall and two combustion chamber independently mutually.
8, heat accumulated type lead-melting furnace according to claim 7 is characterized in that, described bottom of furnace body is provided with the lead discharging mouth.
9, according to the arbitrary described heat accumulated type lead-melting furnace of claim 1 to 7, it is characterized in that, described automatic burner control system is made up of Programmable Logic Controller and upper industrial computer, Programmable Logic Controller is connected with upper machine communication, and the working of a furnace information detecting element of lead melting furnace, control element are connected with Programmable Logic Controller.
10, heat accumulated type lead-melting furnace according to claim 9 is characterized in that, described automatic burner control system disposes the execute-in-place case, and upper industrial computer is operated from a distance, and dual mode can be changed mutually.
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CNA2009101339356A CN101514871A (en) | 2009-04-10 | 2009-04-10 | Heat accumulated type lead-melting furnace |
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CNA2009101339356A CN101514871A (en) | 2009-04-10 | 2009-04-10 | Heat accumulated type lead-melting furnace |
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Cited By (13)
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CN102444910A (en) * | 2011-12-31 | 2012-05-09 | 杭州杭真真空工程技术有限公司 | Combustion control system |
CN102549339A (en) * | 2009-10-23 | 2012-07-04 | 株式会社Ihi | Combustion facility using heat accumulation type burners and combustion method for heat accumulation type burners |
CN102679731A (en) * | 2012-05-29 | 2012-09-19 | 无锡格莱德科技有限公司 | Heat storage type smelting furnace |
CN103398592A (en) * | 2013-08-19 | 2013-11-20 | 佛山市广旭节能自动化科技有限公司 | Heat recovery system of aluminum homogeneous furnace |
CN103968666A (en) * | 2014-05-26 | 2014-08-06 | 苏州卡迪亚铝业有限公司 | Smelting furnace for producing aluminium or aluminium alloy |
CN103968379A (en) * | 2013-01-29 | 2014-08-06 | 中外炉工业株式会社 | Combustion apparatus and combustion control method for combustion apparatus |
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CN104456616A (en) * | 2013-09-24 | 2015-03-25 | 湖南巴陵炉窑节能股份有限公司 | Control method of regenerative combustion equipment |
CN104456618B (en) * | 2014-11-26 | 2017-01-04 | 中国联合工程公司 | A kind of heat storage type combustion control system and control method thereof |
CN109579523A (en) * | 2018-11-29 | 2019-04-05 | 大余明发矿业有限公司 | A kind of modified natural gas heat accumulated type lead-melting furnace |
CN111088427A (en) * | 2018-10-23 | 2020-05-01 | 江西瑞林稀贵金属科技有限公司 | Fan control system and control method based on electronic waste and complex copper-based solid waste |
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2009
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Cited By (19)
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CN102549339B (en) * | 2009-10-23 | 2015-07-22 | 株式会社Ihi | Combustion facility using heat accumulation type burners and combustion method for heat accumulation type burners |
CN102444910A (en) * | 2011-12-31 | 2012-05-09 | 杭州杭真真空工程技术有限公司 | Combustion control system |
CN102679731A (en) * | 2012-05-29 | 2012-09-19 | 无锡格莱德科技有限公司 | Heat storage type smelting furnace |
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CN104456617B (en) * | 2013-09-24 | 2017-01-25 | 湖南巴陵炉窑节能股份有限公司 | Control method of regenerative combustion device |
CN104456616A (en) * | 2013-09-24 | 2015-03-25 | 湖南巴陵炉窑节能股份有限公司 | Control method of regenerative combustion equipment |
CN104456616B (en) * | 2013-09-24 | 2017-01-25 | 湖南巴陵炉窑节能股份有限公司 | Control method of regenerative combustion equipment |
CN104006406A (en) * | 2014-05-21 | 2014-08-27 | 江苏华德工业炉有限公司 | Regenerative heating furnace |
CN103968666A (en) * | 2014-05-26 | 2014-08-06 | 苏州卡迪亚铝业有限公司 | Smelting furnace for producing aluminium or aluminium alloy |
CN104456618B (en) * | 2014-11-26 | 2017-01-04 | 中国联合工程公司 | A kind of heat storage type combustion control system and control method thereof |
CN111088427A (en) * | 2018-10-23 | 2020-05-01 | 江西瑞林稀贵金属科技有限公司 | Fan control system and control method based on electronic waste and complex copper-based solid waste |
CN109579523A (en) * | 2018-11-29 | 2019-04-05 | 大余明发矿业有限公司 | A kind of modified natural gas heat accumulated type lead-melting furnace |
CN111560526A (en) * | 2020-06-16 | 2020-08-21 | 云南锡业股份有限公司锡业分公司 | Fuel gas burning tin refining equipment |
CN111928244A (en) * | 2020-07-30 | 2020-11-13 | 武汉钢铁有限公司 | Heat-storage reversing flameless combustion device |
CN111928244B (en) * | 2020-07-30 | 2022-07-12 | 武汉钢铁有限公司 | Heat-storage reversing flameless combustion device |
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Application publication date: 20090826 |