CN204007104U - A kind of energy-efficient heat accumulating type diecasting alloys smelting furnace - Google Patents
A kind of energy-efficient heat accumulating type diecasting alloys smelting furnace Download PDFInfo
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- CN204007104U CN204007104U CN201420285786.1U CN201420285786U CN204007104U CN 204007104 U CN204007104 U CN 204007104U CN 201420285786 U CN201420285786 U CN 201420285786U CN 204007104 U CN204007104 U CN 204007104U
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Abstract
The utility model discloses a kind of energy-efficient heat accumulating type diecasting alloys smelting furnace, it is high that it mainly solves existing alloy for die casting smelting furnace energy consumption, heat up slow, and melting pan short problem in service life.Utilizing HTAC to change conventional furnaces cannot Mist heat recovering, smelting furnace self-radiating amount is large, masonry of burner hearth accumulation of heat is high, the problem of the large grade of heat loss, solve conventional resistance furnace smelting furnace simultaneously and cannot be rapidly heated in conjunction with melting pan is improved, use restriction that generally cannot blowing out, break through conventional furnaces and used graphite crucible, bad mechanical property, the limitation of cracky.This new furnace has been used Regenerative Combustion Technology, is provided with ad valorem class igniter, and burner can be started working from low temperature.Compact equipment, smelting furnace energy-saving effect is obvious, easy to use, and economic performance and serviceability are better than traditional various firing equipment, and emission is little to ambient influnence.
Description
Technical field
The utility model relates to a kind of diecasting alloys smelting furnace, is specifically related to a kind of energy-conservation smelting furnace of heat-accumulation combustion of melting aluminum (zinc) alloy for die casting.
Background technology
China's five metals manufacturing industry, through accumulation and development since reforming and opening up to the outside world, has now become five metals output the first big country of the world, and the diecasting alloys goods such as aluminium, zinc are the major product types of traditional hardware industry.
Because oil, gas hold at high price, to add conventional furnaces and use combustor to heat, the thermal efficiency is very low, makes production cost too high, cannot meet market competition requirement.Traditional fuel oil or combustion gas alloy melting furnace have lost competitive advantage.
Resistance electric furnace is current the most widely used alloy melting furnace.Resistance furnace generally adopts the heating element heater such as heating wire or Elema, this class electric furnace automatic controlling level is higher, simple in structure, produces easy, owing to not producing flue gas, smelting furnace thermal losses is lower, but its shortcoming is also more outstanding: one, conduct by heat radiation because of main, heat transfer rate is slower, so burn-off rate is very slow, simultaneously general graphite pincers pot has also limited a programming rate for smelting furnace, and the ratio that causes produced heat energy to be absorbed by aluminium alloy is low, and electric energy effective rate of utilization is actual only has 40% left and right; Two, because heating element heater adstante febre self temperature is very high, can reach degree more than 1000, original paper at high temperature autoxidation is very fast, easily aging; Three, alloy molten solution has heavy damage power to heating element heater, will rupture once heating element heater touches molten metal, causes fault; Four, the graphite pincers pot that smelting furnace uses is at present fragile article, and service life is short, is easy to cause a pot body breakage in use procedure; Five, also can be subject to the restriction of electric power increase-volume when enterprise's expanding production.
Than resistance electric furnace, biomass fuel stove, because fuel cost is low, has higher economic benefit, but the bad control of its temperature, and smoke evacuation has larger pollution to surrounding environment.Simultaneously this kind equipment is due to cannot recovery waste heat, and the thermal efficiency is also very low.Along with the regulation of country's lifting environmental pollution, the use of this kind equipment also can be subject to further restriction.
Utility model content
The HTAC that the energy-efficient heat storage type combustion diecasting alloys of the utility model smelting furnace adopts is a brand new technical in gas heating field, this technology utilizes the ceramic heat storage body limit to reclaim the waste heat of high-temperature flue gas in heating process, and it is used for to warm-up combustion-supporting air, combustion air temperature after preheating can approach the temperature of combustion chamber, the preheat temperature that can reach far above common heat exchanger.Heat storage high-efficiency compact, can be integrated in burner.Heat-accumulation combustion effectively solves the problem that this type of smelting furnace cannot Mist heat recovering.
The utility model proposes following technical scheme: a kind of energy-efficient heat accumulating type diecasting alloys smelting furnace, comprise heat resisting steel melting pan (1), heat-accumulating burner (2) and the combustion gas spout (4) and the igniter burner on duty (5) that are connected with heat-accumulation combustion passage (3), it is characterized in that: the melting pan (1) of smelting furnace is by heat-resistance stainless steel machine-shaping, be provided with burning gallery (3) in its bottom, at burning gallery (3) two ends, a pair of supporting heat-accumulating burner (2) be installed; Combustion gas is burning in half built-in burning gallery (3), the heat energy major part producing is absorbed by melting pan (1) wall, remaining using waste heat from tail gas is absorbed by the inner heat storage of heat-accumulating burner (2), and smelting furnace outer wall directly adopts insulation material (6) insulation; Smelting furnace ancillary equipment has comprised air blast, reversal valve, induced-draft fan, PLC central controller; The supply of combustion air is by blower variable frequency speed governing and regulating butterfly valve composition control; Smoke discharge amount is by regulating butterfly valve and induced-draft fan variable frequency regulating speed control; Reversal valve enable possition and burner combustion gas break-make are controlled automatically by automatic controls; Safety control system is by inductor and executing agency's synergistic combination such as the monitoring of burning, automatic ignition, monitoring temperature and motion positions monitoring; The supply of combustion gas is made up of air accumulator, gasification installation, filter, pressure regulator valve, magnetic valve and stainless steel pipes; When work, light igniter burner on duty (5) by automatic ignition watch-dog, and be responsible for its smooth combustion of monitoring.
Further, diecasting alloys smelting furnace has used heat-accumulating burner, has adopted the know-why of high-temperature air burning (HTAC) to carry out combustion heating; It is heat storage that heat-accumulating burner uses ceramic honeycomb material.
Further, alloy melting pan uses heat-resistance stainless steel machine-shaping.
Further, burning gallery (3) is directly made up of heat resisting steel melting pan (1) wall body, and combustion gas only, in burning gallery (3) burning, has reduced the external area of dissipation of burner hearth, has saved fuel consumption.
Further, heating fuel kind both liquefied petroleum gas also use pipe natural gas.
Further, the reversal valve of being responsible for combustion air and flue gas commutation switching can be rotating type change valve, can be also the pipeline reversal valve of pipe interior UNICOM; Executing agency can be electronic, pneumatic or hydraulic drive.
310S heat-resistance stainless steel machine-shaping for the melting pan of the utility model device, the graphite pincers pot that replaces tradition to adopt, has improved firing rate greatly, has reduced preheating time, has promoted production efficiency.Melting pan has good mechanical performance, long service life.Smelting furnace can be rapidly heated to melt and also solve the conventional furnaces problem of uninterrupted insulation for a long time under a lot of operating modes.
Combustion chamber is placed in the semi-enclosed burning gallery in melting pan bottom and has effectively reduced the heat loss such as burner hearth heat radiation, masonry accumulation of heat.Smelting furnace outer wall can directly be filled heat-preservation cotton insulation.
When system works, one of them heat-accumulating burner is for warm-up combustion-supporting air, and pass into fuel gas buring heating, another corresponding burner does not burn, high-temperature flue gas in burning gallery after burning is flowed through after this heat-accumulating burner and is discharged, high-temperature flue gas at short notice by sensible heat transfer to the heat storage in burner, temperature is discharged through reversal valve after reducing, latter two burner working condition exchange of certain hour, previously the burner of burning stops burning, allow smoke gas flow cross for accumulation of heat, the burner of previously accumulation of heat passes into combustion air and burns, in heating work process, reversal valve switches with certain frequency, heat storage in burner also alternate cycles carries out accumulation of heat and heat release.Exhaust gas temperature is general low 150 DEG C.
compared with prior art, advantage of the present utility model is:
The utility model has been realized such smelting furnace and in the time producing combustion product gases, has been carried out the thermoae limit recovery of waste heat, waste-heat recovery device compactness.Comparing traditional combustion mode of heating has realized significantly energy-conservation.
Adopt the melting pan of heat-resistance stainless steel to realize the melted alloy that is rapidly heated, improve die casting efficiency, reduce energy loss.The heat shock resistance of steel melting pan, has good mechanical performance, and the life-span is long.
Traditional combustion chamber is changed in the built-in burning gallery of smelting furnace half, reduced to greatest extent the heat radiation of smelting furnace body of heater.
Safety running control mechanism is perfect, effectively guarantees production safety.
Brief description of the drawings
Fig. 1, Fig. 2 are the process chart of two kinds of running statuses.
Fig. 3 is the profile of melting pan.
Description of reference numerals in figure: 1, heat resisting steel melting pan; 2, heat-accumulating burner; 3, burning gallery (combustion chamber); 4, combustion gas spout; 5, igniter on duty; 6, insulation material.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, the following description is only for explaining the utility model, and is not used in restriction the utility model.
The utility model relates to a kind of heat storage type combustion alloy melting furnace, as shown in Figure 1, mainly but not only, for existing and the supporting alloy melting furnace of die casting machine, this smelting furnace includes heat resisting steel melting pan 1, heat-accumulating burner 2, burning gallery (combustion chamber) 3, combustion gas spout 4 and igniter on duty 5 and supplies with combustion air the pipeline, fuel gas supply and the automation control system that are connected with fume extractor.
Melting pan is processed by 310S heat-resistance stainless steel, cross sectional shape as shown in Figure 3, one semi-enclosed burning gallery 3 is arranged at bottom, heat-accumulating burner is installed on passage two ends, channel bottom is built flame retardant coating, and reserved combustion gas spout and igniter on duty installation site, smelting furnace surrounding is filled out insulation material, and housing is welded by steelframe.
Heat storage can adopt thermal storage ceramic bead or ceramic honeycomb body, and because ceramic honeycomb body has higher specific area, comprehensive heat storage performance is higher than ceramic bead, therefore preferentially select ceramic honeycomb body material.
The supply of combustion gas is made up of air accumulator, gasification installation, filter, pressure regulator valve, magnetic valve and stainless steel pipes.The air supply pipe of pipe natural gas accessible equipment after filter, pressure regulator valve.Combustion gas divides to entering burner 2 by solenoid control break-make.
The preferred rotary-type four-way change-over valve of reversing arrangement, driving can adopt pneumatic, electronic or hydraulic means.Positioning inductor is installed, to confirm the switching position of valve on reversing arrangement.The smoke evacuation outlet of valve is provided with temperature inductor, can provide when guaranteeing that exhaust gas temperature is abnormal and reports to the police and start emergent control.Combustion-supporting air quantity and exhaust smoke level are regulated by the control valve of installing on frequency conversion fan and pipeline.
Igniter on duty is responsible for control by automatic ignitor and flame monitor.
Before opening of device running, first check the safety of gas supply circuit, after confirming, connect combustion gas, unlatching air blast and induced-draft fan carry out the purging of combustion chamber, are confirming, after igniter steady operation on duty, can to open gas control valve, ascending regulating gas amount.
Technological process: with reference to figure 1.Combustion air after reversal valve by the heat-accumulating burner on the left side, the temperature increase after heat storage of flowing through, meanwhile, the combustion gas spout on the left side passes into combustion gas, and combustion gas is lighted and burnt by the igniter on duty of uninterruptedly burning, and directly heats melting pan, the burner on the right is in smoke evacuation operating mode, flue gas heats heat storage in the time flowing through the heat storage on the right, after temperature reduces, by reversal valve, discharges through induced-draft fan.Exhaust gas temperature general control is below 150 DEG C.At next cycle, with reference to figure 2, reversal valve switching direction, electromagnetism cuts off the combustion gas on the left side, and combustion air is by the heat-accumulating burner on the right, temperature increase after the heat storage of flowing through, the combustion gas spout on the right passes into combustion gas burning, and now the burner on the left side is in smoke evacuation operating mode, so periodic duty.
Sensor and controller that smelting furnace is installed are connected to PLC, by its integrated responsible logic control.Safety control system can be at igniter combustion instability, and reversal valve enable possition is not in place, automatically implements emergent control in the abnormal situation of exhaust gas temperature.
Be more than that the typical case who the utility model is done in conjunction with concrete preferred embodiment uses introduction, can not assert that the utility model is confined to these concrete practicing, according to design of the present utility model, can also make some conversion or deduction.
Claims (6)
1. an energy-efficient heat accumulating type diecasting alloys smelting furnace, comprise heat resisting steel melting pan (1), heat-accumulating burner (2) and the combustion gas spout (4) and the igniter burner on duty (5) that are connected with heat-accumulation combustion passage (3), it is characterized in that: the melting pan (1) of smelting furnace is by heat-resistance stainless steel machine-shaping, be provided with burning gallery (3) in its bottom, at burning gallery (3) two ends, a pair of supporting heat-accumulating burner (2) be installed; Combustion gas is burning in half built-in burning gallery (3), the heat energy major part producing is absorbed by melting pan (1) wall, remaining using waste heat from tail gas is absorbed by the inner heat storage of heat-accumulating burner (2), and smelting furnace outer wall directly adopts insulation material (6) insulation; Smelting furnace ancillary equipment has comprised air blast, reversal valve, induced-draft fan, PLC central controller; The supply of combustion air is by blower variable frequency speed governing and regulating butterfly valve composition control; Smoke discharge amount is by regulating butterfly valve and induced-draft fan variable frequency regulating speed control; Reversal valve enable possition and burner combustion gas break-make are controlled automatically by automatic controls; Safety control system is by inductor and executing agency's synergistic combination such as the monitoring of burning, automatic ignition, monitoring temperature and motion positions monitoring; The supply of combustion gas is made up of air accumulator, gasification installation, filter, pressure regulator valve, magnetic valve and stainless steel pipes; When work, light igniter burner on duty (5) by automatic ignition watch-dog, and be responsible for its smooth combustion of monitoring.
2. the energy-efficient heat accumulating type diecasting alloys of one according to claim 1 smelting furnace, is characterized in that, diecasting alloys smelting furnace has used heat-accumulating burner, has adopted the know-why of high-temperature air burning (HTAC) to carry out combustion heating; It is heat storage that heat-accumulating burner uses ceramic honeycomb material.
3. the energy-efficient heat accumulating type diecasting alloys of one according to claim 1 smelting furnace, is characterized in that, alloy melting pan uses heat-resistance stainless steel machine-shaping.
4. the energy-efficient heat accumulating type diecasting alloys of the one smelting furnace described in one of them according to claim 1-3, it is characterized in that, burning gallery (3) is directly made up of heat resisting steel melting pan (1) wall body, combustion gas is only burnt at burning gallery (3), reduce the external area of dissipation of burner hearth, saved fuel consumption.
5. the energy-efficient heat accumulating type diecasting alloys of one according to claim 1 smelting furnace, is characterized in that, heating fuel kind both liquefied petroleum gas also use pipe natural gas.
6. the energy-efficient heat accumulating type diecasting alloys of one according to claim 1 smelting furnace, is characterized in that, the reversal valve of being responsible for combustion air and flue gas commutation switching can be rotating type change valve, can be also the pipeline reversal valve of pipe interior UNICOM; Executing agency can be electronic, pneumatic or hydraulic drive.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420285786.1U CN204007104U (en) | 2014-05-30 | 2014-05-30 | A kind of energy-efficient heat accumulating type diecasting alloys smelting furnace |
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| CN201420285786.1U CN204007104U (en) | 2014-05-30 | 2014-05-30 | A kind of energy-efficient heat accumulating type diecasting alloys smelting furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212689A (en) * | 2020-10-13 | 2021-01-12 | 济南海德热工有限公司 | Heat accumulating type gas crucible furnace |
| CN112682949A (en) * | 2019-10-17 | 2021-04-20 | 芜湖美的厨卫电器制造有限公司 | Combustor, combustion assembly and gas water heater |
-
2014
- 2014-05-30 CN CN201420285786.1U patent/CN204007104U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682949A (en) * | 2019-10-17 | 2021-04-20 | 芜湖美的厨卫电器制造有限公司 | Combustor, combustion assembly and gas water heater |
| CN112212689A (en) * | 2020-10-13 | 2021-01-12 | 济南海德热工有限公司 | Heat accumulating type gas crucible furnace |
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