CN220230106U - Waste heat recycling device of oxygen-enriched smelting furnace - Google Patents
Waste heat recycling device of oxygen-enriched smelting furnace Download PDFInfo
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- CN220230106U CN220230106U CN202321223099.2U CN202321223099U CN220230106U CN 220230106 U CN220230106 U CN 220230106U CN 202321223099 U CN202321223099 U CN 202321223099U CN 220230106 U CN220230106 U CN 220230106U
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- 238000003723 Smelting Methods 0.000 title claims abstract description 71
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000001301 oxygen Substances 0.000 title claims abstract description 48
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 48
- 239000002918 waste heat Substances 0.000 title claims abstract description 28
- 238000004064 recycling Methods 0.000 title abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 93
- 229910052802 copper Inorganic materials 0.000 claims abstract description 91
- 239000010949 copper Substances 0.000 claims abstract description 91
- 238000001035 drying Methods 0.000 claims abstract description 53
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000428 dust Substances 0.000 claims abstract description 37
- 239000003546 flue gas Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims abstract description 7
- 238000013329 compounding Methods 0.000 claims abstract description 5
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 4
- 238000011068 loading method Methods 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims description 29
- 239000007789 gas Substances 0.000 claims description 22
- 238000009529 body temperature measurement Methods 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000011449 brick Substances 0.000 abstract description 25
- 239000002699 waste material Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000007787 solid Substances 0.000 abstract description 12
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
- Y02P10/25—Process efficiency
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model belongs to the technical field of copper production equipment for recycling copper by taking copper-containing solid dangerous waste as a raw material, and particularly relates to a waste heat recycling device of an oxygen-enriched smelting furnace. The device is including the material loading compounding device, brickmaking device, tunnel kiln drying device, feed arrangement, oxygen boosting smelting furnace, high temperature cyclone dust remover, surface cooler, cloth bag dust collector, desulfurizing tower, flue gas draught fan and the chimney that communicate in proper order and set up, high temperature cyclone dust remover the surface cooler with cloth bag dust collector communicates in proper order and sets up, the surface cooler tunnel kiln drying device and axial fan communicate in proper order and set up. For copper-containing solid dangerous waste, the oxygen-enriched smelting furnace waste heat recycling device provided by the utility model is used for production, the surface cooler and cold air are used for indirect heat exchange, the preheated air is used for drying copper-containing bricks, and meanwhile, part of the preheated air enters the furnace, so that heat is recycled.
Description
Technical Field
The utility model belongs to the technical field of copper production equipment for recycling copper by taking copper-containing solid dangerous waste as a raw material, and particularly relates to a waste heat recycling device of an oxygen-enriched smelting furnace.
Background
The treatment method of copper resources in China mainly comprises smelting and processing, about 38% of copper is directly processed into copper products, and about 62% of copper can be indirectly forged into various additional products by factories through smelting. The regenerated copper raw material is divided into a high-grade smelting process and a low-grade smelting process in the actual smelting process, smelting equipment is relatively backward, and the smelting process still adopts a first-stage smelting method, a second-stage smelting method and a third-stage smelting method. The traditional one-stage smelting method aims at high-grade waste copper and scrap copper, and when the copper content is 90% or more, the high-grade waste copper and scrap copper can be directly refined into anode copper by using a fire refining furnace. The secondary smelting method and the tertiary smelting method mainly aim at low-grade waste copper, electronic fertilizer waste, slag with higher copper content and the like, when the copper content is below 90%, the copper content is firstly treated by using a smelting furnace, and if the copper content of the treated material is above 80%, the secondary smelting method is adopted, and the treated material is directly put into a refining furnace to smelt anode copper; if the copper content is 80% or less, a three-stage smelting method is adopted, and the copper is firstly blown and then refined.
The traditional matte smelting process comprises a blast furnace, a reverberatory furnace and an electric furnace smelting, wherein air is used as an oxidant in the process to produce low-grade matte, the degree of oxidative desulfurization is very low, only a small part of heat required for smelting is from oxidation reaction heat, and the rest of heat needs to be additionally supplied. Because of the problems of high energy consumption, heavy pollution and the like, most of the processes are thoroughly eliminated.
Flash smelting and bath smelting are the two most prominent matte smelting processes for copper smelting. In the flash smelting process, copper concentrate powder is dried and then uniformly mixed with flux, and the mixture is sprayed into a reaction tower through a concentrate nozzle by using oxygen-enriched air. In the high-temperature oxidizing atmosphere, the mineral powder rapidly completes the smelting reaction in a falling suspension state, and the generated liquid drop-shaped copper matte and slag fall into a sedimentation tank to be separated. During bath smelting, copper concentrate is typically thrown with the flux from a feed port into the bath surface in the furnace or directly into the melt by a lance without drying. Oxygen and nitrogen are blown into a molten pool in the furnace to provide power for stirring the molten pool, the oxygen and the melt in the bubbles are subjected to mass transfer, concentrate particles are rapidly melted and reacted in the surrounding of the melt, and most of heat required for maintaining the continuous smelting operation is generated. The molten pool smelting method can be divided into three types of top blowing, side blowing and bottom blowing according to different blowing positions.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides a waste heat recycling device of an oxygen-enriched smelting furnace. The technology provided by the utility model can be applied to a waste heat utilization device for producing black copper and matte by using copper-containing solid dangerous waste as a raw material and adopting an oxygen-enriched smelting furnace, and achieves the effects of energy conservation, environmental protection and low production cost.
The technical scheme provided by the utility model is as follows:
the utility model provides an oxygen boosting smelting furnace waste heat recovery utilizes device, includes material loading compounding device, brickmaking device, tunnel kiln drying device, feed arrangement, oxygen boosting smelting furnace, high temperature cyclone dust remover, surface cooler, cloth bag dust collector, desulfurizing tower, flue gas draught fan and chimney that communicate in proper order and set up, the surface cooler has high temperature flue gas import, low temperature flue gas export, low temperature air inlet and high temperature air export, tunnel kiln drying device has hot air inlet and dry back gas outlet, high temperature cyclone dust remover high temperature flue gas import low temperature flue gas export with cloth bag dust collector communicates in proper order and sets up, high temperature air outlet the hot air inlet with dry back gas outlet communicates in proper order and sets up, dry back gas outlet intercommunication is provided with axial fan.
For copper-containing solid dangerous waste, the oxygen-enriched smelting furnace waste heat recycling device provided by the utility model is used for production, the surface cooler and cold air are used for indirect heat exchange, the preheated air is used for drying copper-containing bricks, and meanwhile, part of the preheated air enters the furnace, so that heat is recycled. Thereby reaching the heating range of 40-80 ℃ of cold air, and the water content of the dried copper-containing brick is reduced to below 8 percent from about 30 percent of the original water content. After preheating, the air enters the oxygen-enriched smelting furnace, and the carbon quantity for entering the furnace can be reduced by about 1-3%. According to actual operation, the method can be easily controlled, has good labor conditions, greatly shortens the drying time, improves the yield, has obvious energy-saving effect, is suitable for industrialized mass production, and can be used for treating copper-containing solid dangerous waste to produce black copper and matte.
Specifically, two sides of the furnace body of the oxygen-enriched smelting furnace are respectively provided with a slag hole and a copper outlet, a slag cover is arranged above the slag hole, the slag cover is provided with a slag cover air inlet and a slag cover air outlet, and the slag cover air outlet, the first dust removing net, the first induced draft fan and the hot air inlet are sequentially communicated; and/or be provided with out the copper cover above the copper outlet, it is provided with out copper cover air inlet and out the copper cover gas outlet to go out the copper cover, go out copper cover gas outlet, second dust removal net, second draught fan with the hot air inlet communicates in proper order and sets up.
Based on the technical scheme, the heat of the slag outlet and the copper outlet can be provided to the tunnel kiln drying device for utilization.
Further, the first dust removing net is provided with a dust removing vibration device.
Further, the second dust removing net is provided with a dust removing vibration device.
Specifically, the surface cooler includes:
the sealed box body is provided with the low-temperature air inlet and the high-temperature air outlet on two sides respectively, and the high-temperature air outlet is communicated with a heat exchange induced draft fan;
the serpentine heat exchange tube penetrates through the box body and is provided with the high-temperature flue gas inlet and the low-temperature flue gas outlet, the low-temperature air inlet is provided with an air filter, and the low-temperature air inlet and the low-temperature flue gas outlet are on the same side;
and two exhaust air guide plates fixedly arranged on the tank walls at two sides of the serpentine heat exchange tube.
The oxygen-enriched smelting furnace provides a flue gas heat source with the temperature of 1200-1000 ℃, indirect heat exchange is carried out between the flue gas heat source and air through a surface cooler, and the air after temperature rise is sent to a tunnel drying kiln for copper-containing brick drying.
The surface cooler pipeline and air exchange heat indirectly, and the air inlet is provided with an air filter screen.
The surface cooler pipeline and air indirect heat exchange, the heat exchange box adopts the air heat exchange guide plate of many places installation, increases heat exchange efficiency.
The air after heat exchange can be directly sent to an oxygen-enriched smelting furnace blower and enter the furnace for combustion assistance, thereby achieving the purposes of heat recycling and energy saving.
Further, spiral cooling fins are arranged on the pipe wall of the serpentine heat exchange pipe in a surrounding mode, the width of each spiral cooling fin is 5-15cm, the inclination angle of each spiral cooling fin is 120-150 degrees, and the middle-position distance of each spiral cooling fin is 20-80cm.
The surface cooler and air indirectly exchange heat, the heat exchange radiating fins are uniformly welded on the outer side of the pipeline of the surface cooler, the spiral radiating fins are made of common carbon steel and are spirally wound on the pipeline of the surface cooler, and the heat exchange effect is greatly improved
Further, the lower end face of the serpentine heat exchange tube is provided with a plurality of dust collecting outlets.
Further, the two exhaust air guide plates are arranged in a staggered mode.
Furthermore, a thermocouple temperature measurement control is arranged at the high-temperature flue gas inlet.
Furthermore, a thermocouple temperature measurement control is arranged at the low-temperature flue gas outlet.
Further, a thermocouple temperature measurement control is arranged at the low-temperature air inlet.
Further, a thermocouple temperature measurement control is arranged at the high-temperature air outlet.
Based on the technical scheme, the temperature measurement can be carried out in a segmented mode.
Specific:
a drying trolley is arranged in the tunnel kiln drying device;
a row of tunnel kiln guide plates are respectively arranged on kiln walls at two sides of a channel of the drying trolley;
the top wall of the tunnel kiln drying device is provided with a plurality of dried gas outlets, and each dried gas outlet is communicated with the axial flow fan;
and a row of hot air inlets are respectively arranged at the bottoms of two sides of the channel of the drying trolley, and the hot air inlets of each row are communicated with a hot air main pipe.
Specifically, the distance between the tunnel kiln guide plates is 2-6m, and the tunnel kiln guide plates on two sides are arranged in a staggered way;
specifically, the distance between the hot air inlets is 0.5-2.5m, and the hot air inlets on two sides are staggered;
specifically, the distance between the gas outlets after drying is 5-10m;
further, a hot air valve is disposed between the hot air manifold and each of the hot air inlets.
Specifically, material loading compounding device includes breaker, screening plant and compounding device.
The oxygen-enriched smelting furnace waste heat recycling device is adopted for recycling the oxygen-enriched smelting furnace waste heat, and comprises the following steps: copper-containing solid dangerous waste, lime, iron powder and water are mixed according to a proportion to be used as mixed raw materials, the mixed materials are pressed into copper bricks through a brick making device, the copper bricks are sent into a tunnel drying kiln to be dried, the dried copper bricks, quartz stone, lump coal and limestone are added into a furnace from a charging port at the top of an oxygen-enriched smelting furnace through a quantitative belt conveyor, oxygen-enriched air blown into the furnace enables furnace burden and melt to be vigorously stirred, and the materials fed into the furnace are dried, decomposed and melted to finish slag making and sulfonium making reactions, so that copper melt is produced.
The technical scheme is used for disposing copper-containing solid dangerous waste to produce black copper and matte, indirect heat exchange is carried out between the surface cooler and cold air, preheated air is used for drying copper-containing bricks, and meanwhile, part of preheated air enters a furnace, so that heat is recycled. Thereby reaching the heating range of 40-80 ℃ of cold air, and the water content of the dried copper-containing brick is reduced to below 8 percent from about 30 percent of the original water content. After preheating, the air enters the oxygen-enriched smelting furnace, and the carbon quantity for entering the furnace can be reduced by about 1-3%.
Specifically, after the air is heated by the surface cooler, the air enters the tunnel kiln drying device to heat and dry the copper brick, so that the waste heat is utilized, the energy is saved, the environment is protected, and the production cost is reduced.
Specifically, after the air is heated by the slag cover, the air enters the tunnel kiln drying device to heat and dry the copper brick, so that the waste heat is utilized, the energy is saved, the environment is protected, and the production cost is reduced.
Specifically, after being heated by the copper outlet cover, the air enters a tunnel kiln drying device to heat and dry copper bricks, so that waste heat is utilized, energy is saved, environment is protected, and production cost is reduced.
Drawings
FIG. 1 is a block diagram of a system for oxygen-enriched smelting furnace waste heat recovery and utilization apparatus provided by the utility model.
Fig. 2 is a vertical sectional view of the surface cooler.
Fig. 3 is a side view of a serpentine heat exchange tube.
Fig. 4 is a vertical cross-sectional view of a serpentine heat exchange tube.
Fig. 5 is an internal plan view of the tunnel kiln drying apparatus.
Fig. 6 is an external plan view of the tunnel kiln drying device.
In fig. 1, 2, 3, 4, 5, and 6, the structures represented by the reference numerals are listed below:
1. the surface cooler, 2, tunnel kiln drying device, 3, the drying trolley, 4, axial fan, 5, air filter, 6, hot air inlet, 7, high temperature flue gas inlet, 8, hot air valve, 9, air header pipe, 10, dust collecting outlet, 11, spiral fin, 12, snakelike heat exchange tube, 13, air deflector, 14, tunnel kiln deflector, 15, heat exchange induced draft fan, 16, low temperature flue gas outlet.
Detailed Description
The principles and features of the present utility model are described below with examples only to illustrate the present utility model and not to limit the scope of the present utility model.
In a specific embodiment, as shown in fig. 1, the waste heat recycling device of the oxygen-enriched smelting furnace comprises a crushing device, a screening device, a mixing device, a brick making device, a tunnel kiln drying device 2, a feeding device, the oxygen-enriched smelting furnace, a high-temperature cyclone dust collector, a surface cooler 1, a bag dust collector, a desulfurizing tower, a flue gas induced draft fan and a chimney which are sequentially communicated.
The surface cooler 1 is provided with a high-temperature flue gas inlet 7, a low-temperature flue gas outlet 16, a low-temperature air inlet and a high-temperature air outlet, the tunnel kiln drying device 2 is provided with a hot air inlet 6 and a dried gas outlet, the high-temperature cyclone dust collector, the high-temperature flue gas inlet 7, the low-temperature flue gas outlet 16 and the cloth bag dust collector are sequentially communicated, the high-temperature air outlet, the hot air inlet 6 and the dried gas outlet are sequentially communicated, and the dried gas outlet is communicated and provided with an axial flow fan 4.
For copper-containing solid dangerous waste, the waste heat recycling device of the oxygen-enriched smelting furnace is adopted for production, indirect heat exchange is carried out between the oxygen-enriched smelting furnace and cold air, preheated air is used for drying copper-containing bricks, meanwhile, part of preheated air enters the furnace, heat is recycled, and the oxygen-enriched smelting furnace can be used for treating copper-containing solid dangerous waste to produce black copper and matte.
Example 1
On the basis of the specific embodiment, as shown in fig. 1, two sides of a furnace body of the oxygen-enriched smelting furnace are respectively provided with a slag outlet and a copper outlet, a slag cover is arranged above the slag outlet, the slag cover is provided with a slag cover air inlet and a slag cover air outlet, and the slag cover air outlet, a first dust removing net, a first induced draft fan and a hot air inlet 6 are sequentially communicated; and/or a copper outlet cover is arranged above the copper outlet, the copper outlet cover is provided with a copper outlet cover air inlet and a copper outlet cover air outlet, and the copper outlet cover air outlet, the second dust removing net, the second induced draft fan and the hot air inlet 6 are sequentially communicated. The first dust removing net and the second dust removing net are provided with dust removing vibration devices. Based on the technical scheme, the heat of the slag outlet and the copper outlet can be provided to the tunnel kiln drying device for utilization.
Example 2
In addition to the above embodiment, as shown in fig. 2, the surface cooler 1 includes: the sealed box body is provided with a low-temperature air inlet and a high-temperature air outlet on two sides respectively, and the high-temperature air outlet is communicated with a heat exchange induced draft fan 15; a serpentine heat exchange tube 12 which penetrates through the box body and is horizontally arranged and is provided with a high-temperature flue gas inlet 7 and a low-temperature flue gas outlet 16, wherein an air filter 5 is arranged at the low-temperature air inlet, the low-temperature air inlet and the low-temperature flue gas outlet 16 are arranged on the same side, and a plurality of dust collecting outlets 10 are arranged on the lower end face of the serpentine heat exchange tube 12; and two exhaust air guide plates 13 fixedly arranged on the tank walls at two sides of the serpentine heat exchange tube 12, wherein the two exhaust air guide plates 13 are arranged in a staggered manner. The box body can be correspondingly provided with an ash discharge port.
In the technical scheme, the surface cooler pipeline and air exchange heat indirectly, and the air inlet is provided with an air filter screen in countercurrent heat exchange; the surface cooler pipeline and the air indirectly exchange heat, and the heat exchange box body adopts a plurality of air heat exchange guide plates, so that the heat exchange efficiency is improved; the air after heat exchange can be directly sent to an oxygen-enriched smelting furnace blower and enter the furnace for combustion assistance, thereby achieving the purposes of heat recycling and energy saving. The oxygen-enriched smelting furnace provides a flue gas heat source with the temperature of 1200-1000 ℃, indirect heat exchange is carried out between the flue gas heat source and air through a surface cooler, and the air after temperature rise is sent to a tunnel drying kiln for copper-containing brick drying.
Example 3
On the basis of embodiment 2, as shown in fig. 3 and 4, spiral cooling fins 11 are circumferentially arranged on the pipe wall of the serpentine heat exchange pipe 12, and the width of the spiral cooling fins 11 is 5-15cm, preferably 10cm. The helical fins 11 are inclined at an angle of 120-150 deg., preferably 135 deg.. The median distance of the spiral fins 11 is 20-80cm, preferably 55cm. The surface cooler and air indirectly exchange heat, heat exchange radiating fins are uniformly welded on the outer side of a pipeline of the surface cooler, the spiral radiating fins are made of common carbon steel, and the heat exchange radiating fins are in a spiral surrounding surface cooler pipeline mode, so that the heat exchange effect is greatly improved.
Example 4
On the basis of the embodiment 2, the thermocouple temperature measurement control is arranged at the high-temperature flue gas inlet 7, the thermocouple temperature measurement control is arranged at the low-temperature flue gas outlet 16, the thermocouple temperature measurement control is arranged at the low-temperature air inlet, and the thermocouple temperature measurement control is arranged at the high-temperature air outlet. Based on the technical scheme, the temperature measurement can be carried out in a segmented mode.
Example 5
On the basis of the above specific embodiment, as shown in fig. 5 and 6, a drying trolley 3 is arranged in the tunnel kiln drying device 2; a row of tunnel kiln guide plates 14 are respectively arranged on kiln walls at two sides of a channel of the drying trolley 3; the top wall of the tunnel kiln drying device 2 is provided with a plurality of dried gas outlets, and each dried gas outlet is communicated with an axial flow fan 4; the bottoms of two sides of the channel of the drying trolley 3 are respectively provided with a heat extraction air inlet 6, each row of hot air inlets 6 are communicated with a hot air main pipe 9, and a hot air valve 8 is arranged between the hot air main pipe 9 and each hot air inlet 6.
The distance between the tunnel kiln guide plates 14 is 2-6m, preferably 4m, and the tunnel kiln guide plates 14 on two sides are staggered. The distance between the hot air inlets 6 is 0.5-2.5m, preferably 1.8m, and the hot air inlets 6 on two sides are staggered. The distance between the gas outlets after drying is 5-10m, preferably 7m.
Application example
The oxygen-enriched smelting furnace waste heat recycling device adopting the embodiments carries out oxygen-enriched smelting furnace waste heat recycling, and comprises the following steps: copper-containing solid hazardous waste, lime, iron powder and water are mixed according to a ratio of 77:5:3:15, pressing the mixture into copper bricks by a brick making device, as shown in figure 1, sending the copper bricks into a tunnel drying kiln for drying, adding the dried copper bricks, quartz stone, lump coal and limestone into an oxygen-enriched smelting furnace from a charging port at the top of the oxygen-enriched smelting furnace by a quantitative belt conveyor, blowing oxygen-enriched air into the furnace to severely stir the furnace burden and the melt, and drying, decomposing and melting the materials in the furnace to finish slag making and sulfonium making reactions to produce copper melt.
In the production process, after the air is heated by the surface cooler 1, the air enters the tunnel kiln drying device 2 to heat and dry the copper brick; after being heated by a slag cover, the air enters a tunnel kiln drying device 2 to heat and dry copper bricks; after being heated by the copper outlet cover, the air enters the tunnel kiln drying device 2 to heat and dry copper bricks, so that the waste heat is utilized, and the energy is saved, the environment is protected, and the production cost is reduced.
In the process of producing the copper-containing solid dangerous waste which is treated to produce black copper and matte, the surface cooler and the cold air are used for indirect heat exchange, the preheated air is used for drying copper-containing bricks, and meanwhile, part of the preheated air enters a furnace, so that heat is recycled. Thereby reaching the heating range of 40-80 ℃ of cold air, and the water content of the dried copper-containing brick is reduced to below 8 percent from about 30 percent of the original water content. After preheating, the air enters the oxygen-enriched smelting furnace, and the carbon quantity for entering the furnace can be reduced by about 1-3%.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (8)
1. The utility model provides an oxygen boosting smelting furnace waste heat recovery utilizes device, includes material loading compounding device, brickmaking device, tunnel kiln drying device (2), feed arrangement, oxygen boosting smelting furnace, high temperature cyclone dust remover, surface cooler (1), cloth bag dust collector, desulfurizing tower, flue gas draught fan and the chimney of intercommunication setting in proper order, its characterized in that: the surface cooler (1) is provided with a high-temperature flue gas inlet (7), a low-temperature flue gas outlet (16), a low-temperature air inlet and a high-temperature air outlet, the tunnel kiln drying device (2) is provided with a hot air inlet (6) and a dried gas outlet, the high-temperature cyclone dust collector is sequentially communicated with the high-temperature flue gas inlet (7), the low-temperature flue gas outlet (16) and the cloth bag dust collector, the high-temperature air outlet is sequentially communicated with the hot air inlet (6) and the dried gas outlet, and the dried gas outlet is communicated with an axial flow fan (4).
2. The oxygen-enriched smelting furnace waste heat recovery and utilization device according to claim 1, wherein: the two sides of the furnace body of the oxygen-enriched smelting furnace are respectively provided with a slag hole and a copper outlet, a slag cover is arranged above the slag hole, the slag cover is provided with a slag cover air inlet and a slag cover air outlet, and the slag cover air outlet, the first dust removing net, the first induced draft fan and the hot air inlet (6) are sequentially communicated; and/or be provided with out the copper cover above the copper outlet, it is provided with out copper cover air inlet and out the copper cover gas outlet to go out the copper cover, go out copper cover gas outlet, second dust removal net, second draught fan with hot air inlet (6) intercommunication in proper order sets up.
3. The oxygen-enriched smelting furnace waste heat recovery and utilization device according to claim 2, wherein:
the first dust removing net is provided with a dust removing vibration device;
the second dust removing net is provided with a dust removing vibration device.
4. The oxygen-enriched smelting furnace waste heat recovery and utilization device according to claim 1, wherein the surface cooler (1) comprises:
the sealed box body is provided with the low-temperature air inlet and the high-temperature air outlet on two sides respectively, and the high-temperature air outlet is communicated with a heat exchange induced draft fan (15);
a serpentine heat exchange tube (12) penetrating the box body and provided with the high-temperature flue gas inlet (7) and the low-temperature flue gas outlet (16), wherein the low-temperature air inlet is provided with an air filter (5), and the low-temperature air inlet and the low-temperature flue gas outlet (16) are on the same side;
and two exhaust air guide plates (13) fixedly arranged on the tank walls at two sides of the serpentine heat exchange tube (12).
5. The oxygen-enriched smelting furnace waste heat recovery and utilization device according to claim 4, wherein:
spiral radiating fins (11) are arranged on the pipe wall of the serpentine heat exchange pipe (12) in a surrounding mode, the width of each spiral radiating fin (11) is 5-15cm, the inclination angle of each spiral radiating fin (11) is 120-150 degrees, and the middle-position distance of each spiral radiating fin (11) is 20-80cm;
the lower end face of the serpentine heat exchange tube (12) is provided with a plurality of dust collection outlets (10);
the two exhaust air guide plates (13) are arranged in a staggered way.
6. The oxygen-enriched smelting furnace waste heat recovery and utilization device according to claim 4, wherein:
a thermocouple temperature measurement control is arranged at the high-temperature flue gas inlet (7);
a thermocouple temperature measurement control is arranged at the low-temperature flue gas outlet (16);
a thermocouple temperature measurement control is arranged at the low-temperature air inlet;
and a thermocouple temperature measurement control is arranged at the high-temperature air outlet.
7. The oxygen-enriched smelting furnace waste heat recovery and utilization device according to claim 1, wherein:
a drying trolley (3) is arranged in the tunnel kiln drying device (2);
a row of tunnel kiln guide plates (14) are respectively arranged on kiln walls at two sides of a channel of the drying trolley (3);
the top wall of the tunnel kiln drying device (2) is provided with a plurality of dried gas outlets, and each dried gas outlet is communicated with the axial flow fan (4);
a row of hot air inlets (6) are respectively arranged at the bottoms of two sides of the channel of the drying trolley (3), and the hot air inlets (6) of each row are communicated with a hot air main pipe (9).
8. The oxygen-enriched smelting furnace waste heat recovery and utilization device according to claim 7, wherein:
the distance between the tunnel kiln guide plates (14) is 2-6m, and the tunnel kiln guide plates (14) on two sides are arranged in a staggered way;
the distance between the hot air inlets (6) is 0.5-2.5m, and the hot air inlets (6) on two sides are staggered;
the distance between the gas outlets after drying is 5-10m;
a hot air valve (8) is arranged between the hot air main pipe (9) and each hot air inlet (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321223099.2U CN220230106U (en) | 2023-05-19 | 2023-05-19 | Waste heat recycling device of oxygen-enriched smelting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321223099.2U CN220230106U (en) | 2023-05-19 | 2023-05-19 | Waste heat recycling device of oxygen-enriched smelting furnace |
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