CN100395359C - Heating pipe built-in magnesium reducing furnace - Google Patents
Heating pipe built-in magnesium reducing furnace Download PDFInfo
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- CN100395359C CN100395359C CNB2006100910619A CN200610091061A CN100395359C CN 100395359 C CN100395359 C CN 100395359C CN B2006100910619 A CNB2006100910619 A CN B2006100910619A CN 200610091061 A CN200610091061 A CN 200610091061A CN 100395359 C CN100395359 C CN 100395359C
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a built-in warming pipe magnesium reducing furnace, which is characterized by the following: loading warming pipe in the hearth; extending two ends of warming pipe out of furnace to connect heat accumulating mouth separately; connecting each heat accumulating mouth and fuel channel and air pipe; cascading block cutting valve on the fuel channel; connecting air pipe with induced fan and blower through switch valve; making heat accumulating mouth combust or vent alternatively; transmitting heat into raw material in the hearth; setting crystallizing device on the exterior of furnace; connecting one end of crystallizing device; setting loading hole and slag discharge hole on the upper and lower ends of furnace separately.
Description
Technical field
The present invention relates to the magnesium reduction device, specifically is a kind of heating pipe built-in magnesium reducing furnace, is mainly used in nonferrous metallurgy and the relevant industries reducing process to magnesium.
Background technology
Traditional magnesium reduction technology, adopt following reducing apparatus: fuel burns at burner hearth, adds the thermal reduction jar by thermal radiation and thermal conduction in stove.Material is contained in the reduction jar, by reduce magnesium from reduction tank skin absorption heat.In this technology, reduction jar is indispensable auxiliary facility, and to the requirement of reduction jar than higher, price is higher; To the raw material indirect heating, increase energy consumption and labour intensity by the reduction jar, reduced work efficiency; Above factor has increased the reduction cost of magnesium greatly.
Summary of the invention
Purpose of the present invention just provides a kind of heating pipe built-in magnesium reducing furnace, to solve highly energy-consuming that existing technology exists, magnesium reduction cost height, problem that labor force is big.
In order to achieve the above object, the present invention takes following technical scheme: adopt heating pipe built-in magnesium reducing technology, comprise body of heater, heating tube, gas line, air line, heat-accumulating burner, reversing valve, gas blower, induced draft fan, chimney, crystallizer, vacuum extractor.Built-in heating tube is set on body of heater, is connected with the heat-accumulating burner of outside respectively,, rely on coal gas,, pass to heated raw material by thermal radiation at the heat that the heating tube the inside produces by reversing valve.Whole technology does not need the reduction jar, and thermosteresis is also littler relatively, and labour intensity is littler.
Air is through gas blower, enters reversing valve, the air heat-accumulating burner enters heating tube then and participates in burning.Combustion gases are by heating tube, carry out heat release from the air heat-accumulating burner of an other side, go out after the air heat-accumulating burner, and temperature can be reduced to about 150 ℃, by reversing valve, is discharged in the atmospheric environment through induced draft fan then.
Coal gas is cut valve soon through main valve, enters reversing valve, the coal gas heat-accumulating burner enters heating tube then and participates in burning.Combustion gases are by heating tube, carry out heat release from the coal gas heat-accumulating burner of an other side, go out after the coal gas heat-accumulating burner, and temperature can be reduced to about 150 ℃, by reversing valve, is discharged in the atmospheric environment through induced draft fan then.
If the caloric power of gas height can save the coal gas heat-accumulating burner, directly from main valve, cut valve soon and enter heating tube and participate in burning.Gas after the burning is by heating tube, and after the heat transferred material, all flue gases cool to about 150 ℃ all from air heat-accumulating burner process, by reversing valve, is discharged in the atmospheric environment through induced draft fan then.
Described heat-accumulating burner is by housing and place the accumulation of heat honeycomb (or accumulation of heat bead) in it to constitute, and the liner of housing is mould material and fiberboard.
Described reversing valve and cut valve soon and be pneumavalve.
The present invention takes one-sided burning offside smoke evacuation, both sides to replace the mode of reversing combustion/smoke evacuation, thereby guarantees that heating tube is in the state of continous-stable continuous high temperature, and heating tube two ends temperature is even.
The present invention has the following advantages:
1. produce high-effect: freezing air (or coal gas) is through the temperature of temperature behind the heat-accumulating burner near the heating tube the inside, can fully burn rapidly after entering heating tube, the heat energy that discharges is passed to the intravital material of stove by heating tube, through the heat-accumulating burner of opposite side, discharges with lower temperature.And whole body of heater is the device of a sealing, and heat radiation outward is according to very littler than conventional oven, and all heat energy utilization rates are higher, and the operation at high temperature of whole Working environment promotes the material reaction condition greatly, shortens the production cycle, has improved productive efficiency.
2. energy low consumption: high-temperature flue gas is passed to freezing air (or coal gas) by heat-accumulating burner with most heats, has significantly reduced heat loss due to exhaust gas; And, reduce excess air loss on heating because the incendiary high efficiency can reduce excess air ratio as much as possible; When reducing all kinds of thermosteresis, just improve furnace thermal efficiency, greatly reduced the gas consumption amount equally.
3. reduce tangible production cost: adopt the present invention, directly cancelled the indispensable magnesium reduction tank arrangement of original magnesium reduction technology.The magnesium reduction jar is to account for the very running stores of large portion of production cost in the middle of original production engineering.Adopt after the present invention, saved the cost of ton magnesium.
4. reduce invisible production cost: adopt the present invention, the manpower that needs is according to saving over half than traditional technology.
5. productivity improves: adopt the present invention, volume is little, and floor space is little, and installs removablely, not limited by external conditions such as factory building, and unit occupied area productivity height is realized high yield easily.
6. help intelligent control: can remote real-time monitoring can be carried out very intuitively to stove production process and every operating parameter by control device, break down and to report to the police and emergency processing is done in some accident.Strengthen efficient administration like this, saved manpower, ensured production security.
Description of drawings
Fig. 1 is an overall structure cross-sectional schematic of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Working state schematic representation when Fig. 3 is the burning of the present invention left side, right side smoke evacuation;
Working state schematic representation when Fig. 4 is right side of the present invention burning, left side smoke evacuation;
Fig. 5 is the formation synoptic diagram of the present invention that has automatic control device;
Fig. 6 is the formation synoptic diagram of control device of the present invention.
Embodiment
Referring to Fig. 1 and Fig. 2, the present invention includes heat-accumulating burner 1, heating tube 2, receiving opening 3, body of heater 4, rush down cinder hole 5, crystallization apparatus 6, gas line 7, reversing system 8, air line 9 and cut valve 10 soon.In the burner hearth in described body of heater 4 U-shaped heating tube 2 is housed, the two ends of this heating tube 2 are extended body of heater and are connected a heat-accumulating burner 1 respectively, each heat-accumulating burner 1 is connected with air line 9 with gas line 7, be in series with on this gas line 7 and cut valve 10 soon, this air line 9 is connected with gas blower 12 with induced draft fan 11 respectively by reversing valve 8.Cut valve 10 and reversing valve 8 soon by conversion, make two described heat-accumulating burner 1 alternate combustion or exhaust, the heat that relies on gas-fired to produce in heating tube 2 the insides is passed to heat the heated raw material that places in body of heater 4 burner hearths by thermal radiation and thermal conduction.Be provided with crystallization apparatus 6 outside described body of heater 4, an end of this crystallization apparatus 6 communicates with described burner hearth, and the other end connects vacuum extractor.Top and bottom at described burner hearth are respectively equipped with receiving opening 3 and rush down cinder hole 5.
Heat-accumulating burner 1 internal configuration heat-storing material.Cryogenic gas enters described heat-accumulating burner 1 through described reversing system 8, gas line 7, air line 9, is heated to the condition of high temperature.Fully burning in described heating tube 2 is to body of heater 4 inner heat releases.The later waste gas that burns advanced the heat-accumulating burner 1 of opposite side, and heat is retained down, and discharges through reversing system with low-temperature condition.After the time cycle, commutation repeats this process.In general, only differ about 100 ℃ through gas temperature and described heating tube 2 inner flue-gas temperatures behind the heat-accumulating burner 1, temperature efficiency is up to more than 85%.Can reduce to below 150 ℃ through the funnel temperature behind the heat-accumulating burner 1.
Starting material are put into body of heater 4 by described receiving opening 3, and by radiation and conduction heating, temperature maintenance is in the temperature range of material reaction by described heating tube 2.Raw material is heated the magnesium steam of back generation by described crystallization apparatus 6, is collected, and crystallizes into magnesium ingot.After all material reaction was finished, waste residue was discharged by the described cinder hole 5 that rushes down.This process unit has saved these high flow rate product of reduction jar in the middle of the original process.
Described heat-accumulating burner 1 is by housing and place accumulation of heat honeycomb or accumulation of heat bead in it to constitute, and the liner of housing is mould material and fiberboard.
Described reversing valve 8 and cut valve 10 soon and be pneumavalve.
Referring to Fig. 3 and Fig. 4, heat-accumulating burner 1 of the present invention, heating tube 2 and reversing system 8 can be realized the alternately function of reversing combustion of both sides heat-accumulating burner 1 by manually or automatically controlling the operation of harmonious orderly ground.When promptly burning in the left side (as shown in Figure 3), gas, after air, coal gas are heated, fully burns in heating tube 2 the insides behind left side heat-accumulating burner 1 by reversing system 8, and release of heat is passed to the material of body of heater 4 inside by heat conduction.The heat-accumulating burner 1 of flue gas by the right side, cool to low-temperature condition after, discharge by reversing system 8; When burning on the right side (as shown in Figure 4), gas, after air, coal gas are heated, fully burns in heating tube 2 the insides behind right side heat-accumulating burner 1 by reversing system 8, and release of heat is passed to the material of body of heater 4 inside by heat conduction.The heat-accumulating burner 1 of flue gas by the left side, cool to low-temperature condition after, discharge by reversing system 8.
Referring to Fig. 5 and Fig. 6, reversing valve 8 of the present invention reaches the action of cutting valve 10 soon and is controlled by PLC, and overtemperature alarm is also adjusted a series of functions such as turnaround time automatically.Two heat-accumulating burners 1 are two different working ordeies forever, a burning, another accumulation of heat of discharging fume; The state of the state of reversing valve 8 and burner 1 is consistent, and promptly a burner 1 is a state of combustion, and when another burner 1 was the smoke evacuation state, the state of definition reversing valve 8 this moment was a state of combustion; A burner 1 is for smoke evacuation, when another burner 1 is state of combustion, and reversing valve 8 is the smoke evacuation state.Cut valve 10 soon when a burner 1 goes to smoke evacuation state always first turn out the gas of moment by state of combustion, again reversing valve 8 is switched to the smoke evacuation state.Always earlier reversing valve 8 is switched to state of combustion being gone to state of combustion moment by the smoke evacuation state on the contrary, turn on the gas is cut valve 10 soon again; The conversion regime that another burner 1 and coal gas are cut valve 10 soon is identical.It is wrong to occur certain valve event in commutation process, and Controlling System can be cut valve 10 soon with coal gas immediately and be placed closing condition, and reversing valve 8 places the air feed state, takes place to prevent the gas leaking accident.
Composition and the principle of work of controller C of the present invention are described as follows:
One, system function
1) the PLC system finishes the collection to various supplemental characteristics in the production process, and the conversion of input/output signal is handled, and shows record, accumulation, computing, chain warning, functions such as loop control.
2) mode that adopts CRT to show shows that each monitors the necessary various operations of control, monitoring image.
3) operator pass through the overview panel to CRT, the flow process picture, and trend record is reported to the police, and the observation analysis of pictures such as operation uses operator's keyboard special and mouse to operate.
4) can carry out class's newspaper by printer, daily paper is printed, for production management provides reliable data.
5) field instrument has higher performance, and measuring accuracy and reliability are for the reliability service of Controlling System provides safeguard.
Two, system's characteristics
1) Controlling System is a collective and distributive type control system.
2) control accuracy height, system stability, easy to operate.
3) safeguard easily.
The major control loop
1) Control for Kiln Temperature: Control for Kiln Temperature adopts PID to regulate, and the air of furnace temperature inner loop, gas flow are regulated and adopted deviation formula PI to regulate air, and it is the computing of air-fuel ratio that the coal gas proportioning is regulated.
2) furnace pressure control: the system monitoring furnace pressure, furnace pressure vacuumizes control valve opening by the pi regulator change and realizes.
3) commutation heat-accumulation combustion control:
1.: timing reversing: when system is in auto state, reversing valve is finished the commutation action at a certain time interval, comprises the motion of spool and the switch that space gas is cut valve soon.
2.: constant temperature commutates when funnel temperature is too high, and system is with the commutation of forced commutation valve, in funnel temperature drops to the scope of setting.
3.: when manual reverse of direction is in manual state when system, can cuts valve soon to each valve rod of the reversing valve in the system and coal gas and control respectively, so that each moving parts is checked.
4.: remarkable action is reported to the police and to be worked as reversing valve, and the valve position of cutting valve soon is unusual, or moves for a long time when not in place, and the system alarm pilot lamp can be pointed out the place, trouble spot, and makes corresponding emergency reaction.
The groundwork process of controller C is as follows:
This commutation Regenerative Combustion System adopts two position and four-way reversing valves, and the valve position pilot lamp is arranged on the housing panel.System is in starting position before starting: air reversing valve is in a certain stationary state (being A condition).System is divided into " automatically " " manually " two states, if " automatically " operation is chosen in " automatically " with " automatic/hand ", presses " startup " and gets final product.If " automatic/hand " gets to " manually ", then automatic reverse stops, and can carry out manual reverse of direction.Auto reversive process is: open and cut valve soon, delayed time t1 minute, after the time arrives, close and cut valve soon, after valve position put in place, air reversing valve was changed to state B from state A, after valve position puts in place, open and cut valve soon, delayed time t1 minute ..., so circulation, when transmitter monitors funnel temperature when too high, or when pressing " forced commutation " button, reversing valve commutates pressure, drops to below the permissible value up to funnel temperature; Definite each time valve position is not in place or valve position unusual (long-time valve position is not in place) all will report to the police (the corresponding warning light on the panel is bright, indication fault valve position while buzzer warning), and prompting operation person handles.
4) safety interlocking and warning:
A. when coal gas, air, instrument origin hypotony, all provide and report to the police and implementation gas relief valve emergency switching-off;
B. when funnel temperature is too high, sends guard signal and provide passive contact signal to reversing control system;
5) energy measurement: gas consumption is carried out cummulative metering.
Claims (4)
1. heating pipe built-in magnesium reducing furnace, comprise body of heater, it is characterized in that: in the intravital burner hearth of described stove, heating tube is housed, the two ends of this heating tube are extended body of heater and are connected a heat-accumulating burner respectively, each this heat-accumulating burner also is connected with air line with gas line, on this gas line, be in series with and cut valve soon, this air line is connected with gas blower with induced draft fan respectively by reversing valve, make two described heat-accumulating burner alternate combustion or exhaust, rely on the heat of gas-fired, by thermal radiation and thermal conduction heat is passed to and placed the intravital heated raw material of stove in the generation of heating tube the inside; Be provided with crystallization apparatus outside described body of heater, an end of this crystallization apparatus communicates with described burner hearth; Top and bottom at described burner hearth are respectively equipped with receiving opening and rush down cinder hole.
2. heating pipe built-in magnesium reducing furnace according to claim 1 is characterized in that: described heating tube is the U-shaped pipe.
3. heating pipe built-in magnesium reducing furnace according to claim 1 is characterized in that: described heat-accumulating burner is by housing and place accumulation of heat honeycomb or accumulation of heat bead in it to constitute, and the liner of housing is mould material and fiberboard.
4. heating pipe built-in magnesium reducing furnace according to claim 1 is characterized in that: described reversing valve and cut valve soon and be pneumavalve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100910619A CN100395359C (en) | 2006-07-13 | 2006-07-13 | Heating pipe built-in magnesium reducing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100910619A CN100395359C (en) | 2006-07-13 | 2006-07-13 | Heating pipe built-in magnesium reducing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101012516A CN101012516A (en) | 2007-08-08 |
| CN100395359C true CN100395359C (en) | 2008-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100910619A Expired - Fee Related CN100395359C (en) | 2006-07-13 | 2006-07-13 | Heating pipe built-in magnesium reducing furnace |
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| CN (1) | CN100395359C (en) |
Families Citing this family (2)
| 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 |
| CN106439814A (en) * | 2016-11-22 | 2017-02-22 | 北京神雾环境能源科技集团股份有限公司 | Radiant heater and industrial furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437886A (en) * | 1981-05-06 | 1984-03-20 | Toyota Jidosha Kabushiki Kaisha | Process for manufacture of metallic magnesium |
| CN2576723Y (en) * | 2002-11-08 | 2003-10-01 | 纪振邦 | Metal magnesium reduction furnace |
| WO2005103309A1 (en) * | 2004-04-26 | 2005-11-03 | Fos International S.A. | Metallothermic process for magnesium production and vacuum-induction furnace thereto |
| CN1710364A (en) * | 2005-06-30 | 2005-12-21 | 北京科技大学 | Heat-accumulating type metal magnesium reduction stove |
-
2006
- 2006-07-13 CN CNB2006100910619A patent/CN100395359C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437886A (en) * | 1981-05-06 | 1984-03-20 | Toyota Jidosha Kabushiki Kaisha | Process for manufacture of metallic magnesium |
| CN2576723Y (en) * | 2002-11-08 | 2003-10-01 | 纪振邦 | Metal magnesium reduction furnace |
| WO2005103309A1 (en) * | 2004-04-26 | 2005-11-03 | Fos International S.A. | Metallothermic process for magnesium production and vacuum-induction furnace thereto |
| CN1710364A (en) * | 2005-06-30 | 2005-12-21 | 北京科技大学 | Heat-accumulating type metal magnesium reduction stove |
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| Publication number | Publication date |
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| CN101012516A (en) | 2007-08-08 |
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