CN101093140A - Heat storage type vertical metal magnesium reducing furnace - Google Patents

Heat storage type vertical metal magnesium reducing furnace Download PDF

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Publication number
CN101093140A
CN101093140A CN 200610093387 CN200610093387A CN101093140A CN 101093140 A CN101093140 A CN 101093140A CN 200610093387 CN200610093387 CN 200610093387 CN 200610093387 A CN200610093387 A CN 200610093387A CN 101093140 A CN101093140 A CN 101093140A
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CN
China
Prior art keywords
heat
furnace
regenerator
gas
burner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 200610093387
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Chinese (zh)
Inventor
辛卫亚
李文胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hengtuo Energy & Environment Engineering Tech Co Ltd Beijing
NINGXIA HUAYUAN METALLURGICAL INDUSTRIAL Co Ltd
Original Assignee
Hengtuo Energy & Environment Engineering Tech Co Ltd Beijing
NINGXIA HUAYUAN METALLURGICAL INDUSTRIAL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hengtuo Energy & Environment Engineering Tech Co Ltd Beijing, NINGXIA HUAYUAN METALLURGICAL INDUSTRIAL Co Ltd filed Critical Hengtuo Energy & Environment Engineering Tech Co Ltd Beijing
Priority to CN 200610093387 priority Critical patent/CN101093140A/en
Publication of CN101093140A publication Critical patent/CN101093140A/en
Pending legal-status Critical Current

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Abstract

This invention relates to a Mg recovery furnace with a vertical recovery tank composed of a hearth, a roof, a wall, burners, a recovery tank, bottom storage chambers and a fan charactering in arranging several pairs of double-storage burners along the bottom of two ends on the furnace width direction, forming storage chamber1 and 2 on the bottom of the two ends, installing two directional valves at either end, the directional valves, the storage chamber 1 and 2 and the fan are connected with a directional control system by exterior pipelines, applying a vertical mode to arrange the recovery tank in the hearth and feeding from the top and discharging from the bottom, which costs less energy, temperature in the furnace is the uniform and burning mode is exclusive.

Description

Heat storage type vertical metal magnesium reducing furnace
Technical field
The present invention relates to a kind of metal magnesium reduction furnace, especially relate to a kind of jar that reduces and be vertical heat storage type vertical metal magnesium reducing furnace.
Background technology
The general employing of conventional metals magnesium reducing furnace returned the structure that heat adds the thermal reduction jar, flame in the reduction furnace of this traditional structure and flue gas climb over firebreak and enter burner hearth, from top to bottom through the reduction jar, very fast discharges burner hearth by inhaling fire hole, exhaust gas temperature up to 1200 ℃ about, can not well recycle, energy waste is serious.In addition, traditional metal magnesium reduction furnace is a fuel with the raw coal, and efficiency of combustion is low, seriously polluted, and this combustion system causes temperature inequality in the metal magnesium reduction furnace burner hearth, and ignition temperature control is dumb, cause the service life of reduction jar short, the finished product magnesium metal quality of producing is not high.
Wasted space is big in the existing metal magnesium reduction furnace stove, and the knee wall of reduction jar occupies than large space, the conduction of influence heat; Body of heater adopts refractory brick to build by laying bricks or stones, and directly smoke evacuation, and thermal loss is huge; Reduction jar horizontal positioned easily deforms under the long term high temperature high vacuum condition, makes to take on to expect to be obstructed, and finally influences service life: the level filling, and very difficult that the material dress is real, often the uniformity that unreal influence is heated is loaded in appearance, thereby influences reaction uniformity; In refining magnesium process, the reduction jar easy laying dust in top uses laying dust serious for a long time, the conduction of influence heat; Main coal or the producer gas of adopting of reduction furnace heating directly burns, and do not have dust removal installation; Coal gas adopts the simple and easy burner of low technical content, and fuel combustion is insufficient, produces a large amount of pernicious gas and industrial dust, contaminated environment.When filling with substance, the workman pushes reaction mass with stock, during discharging, with stock material is bit by bit drawn out again, and the loading and unloading material all carries out at a reduction jar end, and the operating time is long, and environment is abominable, and labour intensity is big, and personnel concentrate, and are prone to security incident.
Summary of the invention
The present invention overcomes the deficiencies in the prior art, the service life that provide that a kind of energy consumption is low, temperature homogeneous in the stove, combustion system uniqueness, environment protecting are good, has prolonged stove, improve efficiency of combustion, reduced flue gas thermal loss, improve production capacity, reduce cost, safe and reliable heat storage type vertical metal magnesium reducing furnace.
The present invention realizes in the following way:
A kind of heat storage type vertical metal magnesium reducing furnace, form by burner hearth, furnace roof, furnace wall, burner, reduction jar, furnace bottom regenerator and blower fan, it is characterized in that: some to two heat-accumulating burners along being furnished with of bottom, the two ends on stove cross direction correspondence, form regenerator I and regenerator II at the two ends furnace bottom, two reversal valves are respectively installed at two ends, and reversal valve is connected with reversing control system by the outer pipeline of stove with blower fan with regenerator I, regenerator II;
Reduction jar in the described burner hearth adopts vertical mode to arrange, the top charging, and slag tap in the bottom;
The method of operation of reduction furnace is, the heat-accumulating burner in left side is in burning, the gas that participates in burning has been held the ceramic bead that heat is arranged through in the regenerator, spray into the stove internal combustion after being heated, the heat absorption of discharging fume of the ceramic bead of right side regenerator, the recovery waste heat in its flue gas of flowing through, after system's commutation, the regenerator on right side is operated in the heat release state, flow through its gas of heating, the left side regenerator is operated in the heat absorption state, absorbs the sensible heat in the left side heat storage flue gas of flowing through, by the continuous switch operating state of exchange system, the regenerator of the left and right sides can be given working gas the sensible heat transfer in the flue gas;
Reduction jar in the described burner hearth is equally divided into four rows, and every row reduces tank body and keeps at a certain distance away;
Along correspondence on the two ends furnace wall on the stove cross direction two pairs of described air, coal gas integral type heat-accumulating burner are being set;
Along the igniter burner that two be used for lighting a fire baker and low temperature ever-burning flames are set on the two ends furnace wall on the stove cross direction, each burner is provided with the gas flow valve that this burner can be freely regulated/be cut off in an independent manual adjustments/cut-out;
Described reversal valve is an air--flue gas and coal gas--two position three way directional control valve of-flue gas, this valve directly is connected with air, the gas regenerator of described pair of heat-accumulating burner, links to each other with extraneous air, coal gas source and air smoke evacuation, coal gas smoke discharging pipe simultaneously;
The material of described reduction jar is Cr25Ni20.
The present invention has following effect:
1) combustion system uniqueness, environment protecting is good, prolonged the service life of stove: in traditional combustion, fuel and air spray in the burner hearth by a burner, fuel and air have blending preferably, the mixed combustible gas body forms flame in burner hearth, this flame combustion has the high point of temperature and heat flow in distance spout a distance, and in the heat storage type combustion provided by the invention, if the fuel preheat temperature is very high, adopt the blending burning of fuel and air will cause flame high temperature dot temperature too high, the furnace temperature inequality, therefore heat storage type combustion of the present invention adopts diverse burning organizational form, allow air and coal gas spray into burner hearth respectively by spout separated by a distance, avoid flame high temperature dot to occur, make the oxygen content of combustion zone remain on low-level simultaneously always, suppress the generation of NOX pollutant, this special combustion system with burner hearth integral body as a reactor, the oxidation reaction of fuel and air spreads all over whole burner hearth, visible flame and its distinctive flame high-temperature region of not having the traditional combustion mode to be had, temperature is very even in the whole stove, this combustion system has thoroughly solved the high pollution problem of burning and being caused under the high preheat temperature, simultaneously, the all even elimination of furnace temperature localized hyperthermia has improved heating process, improve the quality of products, prolonged the service life of stove.
2) improve efficiency of combustion, reduced flue gas thermal loss, improve the quality of products: the present invention adopts the heat storage type combustion mode, space gas is the curtain wall formula and sprays into, fully mix then and burn, temperature is very even in the stove, full combustion of fuel, pernicious gas significantly reduces, and greatly reduce exhaust gas temperature, by original being reduced to more than 900 ℃ below 150 ℃, fully reclaiming heat, and improve and produce and surrounding enviroment, not only improve the combustion rate of burning, and reduced the thermal loss of flue gas, and improved the quality of product, prolonged the service life of stove.
3) structure uniqueness, reduction jar long service life: the type of furnace of the present invention adopts brand-new structure, two ends heat accumulating type heating, the curtain wall formula sprays into burning, a reduction jar employing is arranged vertically, the top charging, slag tap in the bottom, and reduction jar material is used Cr25Ni20, strengthen the intensity and the wearability of condition of high temperature lower tank, and increase substantially the service life of tank body.
4) improve production capacity, reduce cost: reduction furnace provided by the invention is that the coal gas of 3400kcal/Nm3 is fuel with the calorific value, and with behind the high temperature more than the air, gas double pre-heating to 900 ℃, spray in the burner hearth again and burn, can under hypoxemia, burn rapidly, reaction spreads all over whole burner hearth, does not have the localized hyperthermia district.Can make fire box temperature be elevated to reaction temperature fast like this, and be stabilized in the technological requirement scope, save the coal energy in a large number, therefore not only can improve the production capacity of magnesium reducing furnace.And reduce cost.
5) safe and reliable: the present invention adopts the heat-accumulating burner form, and the coal gas heat-accumulating burner is parallel with the air heat-accumulating burner to spray in the stove, and the possibility that coal gas and air are not met outside burner hearth has reduced potential safety hazard; The employing ceramic bead is a heat storage, and the commutation cycle is long, the coal gas less wastage, thus make the gas content in the flue gas low; Adopted and concentrated and distributed mixed type commutation form, the trouble point is few, and is easy to maintenance, and the stove internal combustion is safe and reliable.
6) the present invention adopts the two heat-accumulating burners on the furnace wall of two ends to carry out heat supply, and whole reduction furnace is along six heat supply points are set on the stove cross direction.Reduction furnace is provided with two igniter burners be used for lighting a fire baker and low temperature ever-burning flame, and each burner is provided with independent manual adjustments/stop valves, can freely regulate/cut off the gas flow of this burner, also provides convenience for safeguarding simultaneously.Electric control valves are set in coal gas, air header road, can regulate the gas flow of trunk line.A coal gas is set above the coal gas trunk line cuts valve soon, guarantee that coal gas is safe in utilization.
7) very convenient, the high insulating effect of site operation, good seal performance: integral type heat-accumulating burner of the present invention adopts built-in, heat storage is placed on furnace wall inside, each two gas regenerator of every side, two air regenerators, full stove is totally 8 regenerator, regenerator and the cast of furnace wall one, site operation is very convenient, burner all is embedded in the furnace wall, high insulating effect, good seal performance.
8) energy-conservation: body of heater of the present invention adopts high insulation material, and it is minimum that the heat energy consumption of holding stage is dropped to, and significantly reduced because the heat that body of heater dispels the heat and loses.The more traditional magnesium metal reduction process of uniformity of temperature improves greatly in the stove, has eliminated localized hyperthermia's point, has prolonged the service life of stove and reduction jar.Adopt the heat storage type combustion mode, exhaust gas temperature has reduced about 1000 ℃, presses the heater heat Balance Calculation, can save 50% fuel at least.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
A kind of heat storage type vertical metal magnesium reducing furnace, by burner hearth 1, furnace roof 2, furnace wall 3, burner 4, reduction jar 5, furnace bottom regenerator 6 and blower fan 7 are formed, as shown in Figure 1: some to two heat-accumulating burners 4 along being furnished with of bottom, the two ends on stove cross direction correspondence, form regenerator I8 and regenerator II9 at the two ends furnace bottom, two reversal valves 13 are respectively installed at two ends, reversal valve 13 and regenerator I8, regenerator II9 is connected with reversing control system 11 by the outer pipeline 10 of stove with blower fan 7, reduction jar 5 in the burner hearth 1 adopts vertical mode to arrange, the top charging, slag tap in the bottom, reduction jar 5 in the burner hearth 1 is equally divided into four rows, every row reduces jar 5 bodies and keeps at a certain distance away, along correspondence on the two ends furnace wall 3 on the stove cross direction two pairs of described air are being set, coal gas integral type heat-accumulating burner 4, along the igniter burner that two be used for lighting a fire baker and low temperature ever-burning flames are set on the two ends furnace wall 3 on the stove cross direction, each burner is provided with the gas flow valve 12 that this burner can be freely regulated/be cut off in an independent manual adjustments/cut-out, reversal valve 13 is an air--flue gas and coal gas--two position three way directional control valve of-flue gas, the air of this valve and two heat-accumulating burners 4, the gas regenerator directly connects, while and extraneous air, coal gas source and air smoke evacuation, the coal gas smoke discharging pipe links to each other, and the material of reduction jar 5 is Cr25Ni20.
As shown in Figure 1: the method for operation of reduction furnace is, the heat-accumulating burner in left side is in burning, the gas that participates in burning has been held the ceramic bead that heat is arranged through in the regenerator, spray into the stove internal combustion after being heated, the heat absorption of discharging fume of the ceramic bead of right side regenerator, the recovery waste heat in its flue gas of flowing through, after system's commutation, the regenerator on right side is operated in the heat release state, flow through its gas of heating, the left side regenerator is operated in the heat absorption state, absorbs the sensible heat in the left side heat storage flue gas of flowing through, by the continuous switch operating state of exchange system, the regenerator of the left and right sides can be given working gas the sensible heat transfer in the flue gas.

Claims (8)

1. heat storage type vertical metal magnesium reducing furnace, form by burner hearth (1), furnace roof (2), furnace wall (3), burner (4), reduction jar (5), furnace bottom regenerator (6) and blower fan (7), it is characterized in that: some to two heat-accumulating burners (4) along being furnished with of bottom, the two ends on stove cross direction correspondence, form regenerator I (8) and regenerator II (9) at the two ends furnace bottom, two reversal valves (13) are respectively installed at two ends, and reversal valve (13) is connected with reversing control system (11) by the outer pipeline (10) of stove with blower fan (7) with regenerator I (8), regenerator II (9).
2. heat storage type vertical metal magnesium reducing furnace as claimed in claim 1 is characterized in that: the reduction jar (5) in the described burner hearth (1) adopts vertical mode to arrange, the top charging, and slag tap in the bottom.
3. heat accumulating high efficiency green metal magnesium reduction furnace as claimed in claim 1 or 2, it is characterized in that: the method for operation of reduction furnace is, the heat-accumulating burner in left side is in burning, the gas that participates in burning has been held the ceramic bead that heat is arranged through in the regenerator, spray into the stove internal combustion after being heated, the heat absorption of discharging fume of the ceramic bead of right side regenerator, the recovery waste heat in its flue gas of flowing through, after system's commutation, the regenerator on right side is operated in the heat release state, flow through its gas of heating, the left side regenerator is operated in the heat absorption state, sensible heat on the left of absorption is flowed through in the heat storage flue gas, by the continuous switch operating state of exchange system, the regenerator of the left and right sides can be given working gas the sensible heat transfer in the flue gas.
4. heat storage type vertical metal magnesium reducing furnace as claimed in claim 1 or 2 is characterized in that: the reduction jar (5) in the described burner hearth (1) is equally divided into four rows, and every row reduces jar (a 5) body and keeps at a certain distance away.
5. heat storage type vertical metal magnesium reducing furnace as claimed in claim 1 or 2 is characterized in that: along the last correspondence of the two ends furnace wall (3) on the stove cross direction two pairs of described air, coal gas integral type heat-accumulating burner (4) are being set.
6. heat storage type vertical metal magnesium reducing furnace as claimed in claim 1 or 2, it is characterized in that: along the igniter burner that two be used for lighting a fire baker and low temperature ever-burning flames are set on the two ends furnace wall (3) on the stove cross direction, each burner is provided with the gas flow valve (12) that this burner can be freely regulated/be cut off in an independent manual adjustments/cut-out.
7. heat storage type vertical metal magnesium reducing furnace as claimed in claim 1 or 2, it is characterized in that: described reversal valve (13) is air--flue gas and coal gas--two position three way directional control valve of-flue gas, this valve directly is connected with air, the gas regenerator of described pair of heat-accumulating burner (4), links to each other with extraneous air, coal gas source and air smoke evacuation, coal gas smoke discharging pipe simultaneously.
8. heat storage type vertical metal magnesium reducing furnace as claimed in claim 1 or 2 is characterized in that: the material of described reduction jar (5) is Cr25Ni20.
CN 200610093387 2006-06-21 2006-06-21 Heat storage type vertical metal magnesium reducing furnace Pending CN101093140A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200610093387 CN101093140A (en) 2006-06-21 2006-06-21 Heat storage type vertical metal magnesium reducing furnace

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Application Number Priority Date Filing Date Title
CN 200610093387 CN101093140A (en) 2006-06-21 2006-06-21 Heat storage type vertical metal magnesium reducing furnace

Publications (1)

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CN101093140A true CN101093140A (en) 2007-12-26

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101457305B (en) * 2008-12-31 2011-01-12 邓小宝 Double-burning and double thermal heat storing type energy-saving high efficiency furnace and tank integrated reducing furnace system
CN101942574A (en) * 2010-09-28 2011-01-12 北京沃克能源科技有限公司 Pulse-combustion heat accumulating type metal magnesium reduction furnace
CN102235817A (en) * 2010-04-30 2011-11-09 于思静 Vertical heat accumulating type reduction furnace
CN103743237A (en) * 2013-12-30 2014-04-23 苏州市层燃炉窑科技有限公司 Heating furnace
CN107014212A (en) * 2017-04-19 2017-08-04 项玮 Heat storage type combustion and furnace gas forced circulation industrial furnace

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101457305B (en) * 2008-12-31 2011-01-12 邓小宝 Double-burning and double thermal heat storing type energy-saving high efficiency furnace and tank integrated reducing furnace system
CN102235817A (en) * 2010-04-30 2011-11-09 于思静 Vertical heat accumulating type reduction furnace
CN101942574A (en) * 2010-09-28 2011-01-12 北京沃克能源科技有限公司 Pulse-combustion heat accumulating type metal magnesium reduction furnace
CN103743237A (en) * 2013-12-30 2014-04-23 苏州市层燃炉窑科技有限公司 Heating furnace
CN107014212A (en) * 2017-04-19 2017-08-04 项玮 Heat storage type combustion and furnace gas forced circulation industrial furnace
CN107014212B (en) * 2017-04-19 2019-03-15 项玮 Heat storage type combustion and furnace gas forced circulation industrial furnace

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