CN111154981A - Comprehensive recovery treatment furnace - Google Patents
Comprehensive recovery treatment furnace Download PDFInfo
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- CN111154981A CN111154981A CN202010082988.6A CN202010082988A CN111154981A CN 111154981 A CN111154981 A CN 111154981A CN 202010082988 A CN202010082988 A CN 202010082988A CN 111154981 A CN111154981 A CN 111154981A
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- 238000011084 recovery Methods 0.000 title claims abstract description 61
- 238000012545 processing Methods 0.000 claims description 39
- 239000002893 slag Substances 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011819 refractory material Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 13
- 230000007613 environmental effect Effects 0.000 abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 18
- 239000003546 flue gas Substances 0.000 description 18
- 239000003345 natural gas Substances 0.000 description 16
- 239000002699 waste material Substances 0.000 description 15
- 239000002920 hazardous waste Substances 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 13
- 150000002739 metals Chemical class 0.000 description 13
- 229910052760 oxygen Inorganic materials 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 229910052745 lead Inorganic materials 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a comprehensive recovery treatment furnace, which comprises a hearth, an expansion section hearth, a straight hearth, a furnace top and a flue, wherein the hearth comprises a hearth side wall and a hearth bottom wall; the expanded section hearth comprises an expanded section hearth side wall, an expanded section hearth is limited by the expanded section hearth side wall, the lower end of the expanded section hearth side wall is connected with the upper end of the hearth side wall, the horizontal inner diameter of the expanded section hearth is gradually expanded from bottom to top, and the expanded section hearth is divided into a first expanded section hearth and a second expanded section hearth; the straight hearth comprises a straight hearth side wall, a straight furnace chamber is defined by the straight hearth side wall, and the lower end of the straight hearth side wall is connected with the upper end of the enlarged-section hearth side wall; the furnace top comprises a first furnace top and a second furnace top, and a feed opening is arranged on the second furnace top; the flue is arranged on the second furnace top. The comprehensive recovery treatment furnace has the advantages of high recovery treatment efficiency, good recovery treatment effect, high economy and good environmental protection effect.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment, in particular to a comprehensive recovery treatment furnace.
Background
The low-carbon economy is advocated in the current nonferrous metal industry, and secondary resource recovery is developed while comprehensive utilization in the production process is enhanced. The "secondary resource" is solid, liquid and gas waste with reuse value discharged by industrial enterprises which take mineral resources as raw materials and fuels. Strengthen the comprehensive recycling of 'secondary resources', effectively reduce the pollution generated by the nonferrous metal industry, and also be an important measure for solving the shortage of mineral resources. At present, the technical field generally uses a blast furnace for production, but the blast furnace has the inherent defects of low efficiency and poor environmental protection performance.
The "hazardous waste" refers to a waste which is classified in the national hazardous waste list or identified according to the national hazardous waste identification standard and method, and has one of the hazardous properties such as explosiveness, inflammability, oxidizability, toxicity, corrosiveness, and infectious diseases.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a comprehensive recycling furnace, which can recycle and treat secondary resources and hazardous wastes, and has high recycling efficiency, good recycling effect, high economy and good environmental protection effect.
The comprehensive recovery processing furnace according to the embodiment of the invention comprises:
the furnace hearth comprises a furnace hearth side wall and a furnace hearth bottom wall, the furnace hearth side wall and the furnace hearth bottom wall jointly define a furnace outlet cavity, and a plurality of spray gun ports are arranged on the furnace hearth side wall;
the expanded section hearth comprises an expanded section hearth side wall, an expanded section furnace chamber is limited by the expanded section hearth side wall, the lower end of the expanded section hearth side wall is connected with the upper end of the hearth side wall, the horizontal inner diameter of the expanded section furnace chamber is gradually expanded from bottom to top, and the expanded section furnace chamber is divided into a first expanded section furnace chamber and a second expanded section furnace chamber which are communicated with each other in the horizontal direction;
the straight hearth comprises a straight hearth side wall, the straight hearth side wall defines a straight furnace chamber, and the lower end of the straight hearth side wall is connected with the upper end of the expanded section hearth side wall corresponding to the second expanded section furnace chamber;
the furnace top comprises a first furnace top covering the top of the first expansion section furnace chamber and a second furnace top covering the top of the straight furnace chamber, and a feed opening is formed in the second furnace top;
a flue vertically disposed on the second roof and adjacent to the first roof.
According to the comprehensive recovery treatment furnace provided by the embodiment of the invention, the working process is as follows: slagging agent, reducing agent and secondary resources such as copper-containing sludge, copper-containing solid waste, surface treatment substances and the like are added into the comprehensive recovery treatment furnace through a feed opening arranged on a second furnace top after being proportioned, a plurality of spray guns spray high-speed oxygen-enriched air and natural gas into the molten pool, the oxygen-enriched air and the natural gas are vigorously combusted in the molten pool to provide heat sources for melting the added materials, meanwhile, the reaction atmosphere of the molten pool is controlled by controlling the input amount of the natural gas to accelerate the reduction of valuable metals, CO and the like which are not completely combusted in the molten pool are combusted in an expansion section furnace chamber and a straight furnace chamber, flue gas generated by combustion enters a waste heat boiler through a flue, the valuable metals such as Cu, Pb and the like are enriched and periodically recovered at the bottom of a furnace cylinder chamber, and volatile valuable metals such as Zn and the like enter the flue.
According to the comprehensive recovery processing furnace provided by the embodiment of the invention, the horizontal inner diameter of the furnace chamber of the expansion section is gradually enlarged from bottom to top, the horizontal inner diameter of the furnace chamber of the furnace cylinder is the same as the bottom of the furnace chamber of the expansion section, the horizontal inner diameter of the straight furnace chamber is the same as the top of the furnace chamber of the expansion section, a mixture added from the feed opening is melted in the furnace chamber of the furnace cylinder to form a molten pool, a spray gun sprays high-speed oxygen-enriched air and natural gas into the molten pool, the oxygen-enriched air and the natural gas are vigorously combusted in the molten pool to supplement heat for the molten pool, meanwhile, the input amount of the natural gas is controlled to control the reaction atmosphere of the molten pool, combustible dangerous waste, CO which is not completely combusted in the molten pool and the like are combusted in the furnace chamber of the expansion section and the furnace chamber of; valuable metals such as Cu, Pb and the like are enriched at the bottom of the hearth cavity and are periodically recovered, and volatile valuable metals such as Zn and the like enter the flue and are recovered by the flue gas system, so that the environmental pollution is reduced, and the environment-friendly effect is good. In conclusion, the comprehensive recovery treatment furnace provided by the embodiment of the invention can be used for recovering and treating secondary resources and hazardous wastes, and has the advantages of high recovery treatment efficiency, good recovery treatment effect, high economy and good environmental protection effect.
According to an embodiment of the invention, the second enlarged segment furnace chamber has a height higher than a height of the first enlarged segment furnace chamber.
According to one embodiment of the invention, the inner bottom surface of the hearth cavity is a concave arc-shaped surface, a V-shaped surface, an inclined surface or a horizontal surface.
According to an embodiment of the present invention, the hearth chamber is horizontally divided into a first hearth chamber and a second hearth chamber connected to each other, wherein the first hearth chamber is vertically communicated with the first expansion-section furnace chamber, the second hearth chamber is vertically communicated with the second expansion-section furnace chamber, and an inner bottom surface of the first hearth chamber is higher than an inner bottom surface of the second hearth chamber.
According to a further embodiment of the invention, the hearth side wall is provided with a first slag discharge opening at one end of the first hearth cavity.
According to a further embodiment of the present invention, a second slag discharging port is further disposed on one end of the hearth side wall located in the first hearth cavity, and the height of the second slag discharging port is lower than that of the first slag discharging port.
According to a still further embodiment of the present invention, the hearth side wall is provided with two valuable metal tapping holes at one end of the second furnace chamber.
According to one embodiment of the invention, the hearth is in the form of a structure lined with high-quality refractory material in the teeth of a tooth-shaped cast copper water jacket.
According to one embodiment of the invention, the enlarged-segment hearth is in a structure form that the groove of the dovetail groove type casting copper water jacket is lined with high-quality refractory materials.
According to one embodiment of the invention, the straight hearth, the flue and the furnace top are all in the structural form of ramming mass lined in a steel plate water jacket.
According to one embodiment of the invention, the furnace roof is a full-cast water-cooled roof.
According to one embodiment of the invention, the outer periphery of the hearth and the outer periphery of the expanded-segment furnace are provided with furnace shell coamings, and the outer peripheries of the furnace shell coamings and the straight furnace are correspondingly connected with a plurality of columns distributed on the outer periphery of the furnace body through a plurality of girts.
According to an embodiment of the invention, further comprising a bottom beam located below the hearth bottom wall, the hearth bottom wall being supported on the bottom beam for ventilating below the hearth bottom wall.
According to an embodiment of the present invention, the furnace further comprises an electrode assembly, wherein the electrode assembly is mounted on the first furnace top, and one end of the electrode assembly extends into the first enlarged furnace chamber and the furnace hearth chamber.
According to an embodiment of the present invention, the second furnace ceiling has an inclined portion extending downward from a distance to a distance within a range near the outer periphery of the flue, with respect to the lower inlet of the flue, so that the height of the portion of the straight furnace chamber within the range near the outer periphery of the flue is gradually reduced from the distance to the distance.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of an integrated recovery processing furnace according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view taken along line a-a in fig. 1.
Fig. 3 is a schematic cross-sectional view taken along line B-B in fig. 1.
Reference numerals:
comprehensive recovery processing furnace 1000
Hearth 1
Hearth chamber 103 first hearth chamber 1031 second hearth chamber 1032
First slag discharge opening 104 and second slag discharge opening 105, spray gun opening 106 and valuable metal discharge opening 107
Expanding section hearth 2
Expanded section hearth side wall 201
Extended zone oven cavity 202 first extended zone oven cavity 2021 second extended zone oven cavity 2022
Straight hearth side wall 301 and straight furnace chamber 302
Furnace roof 4
First stove top 401 and second stove top 402 blanking mouth 403
Flue 5
Tooth-shaped casting copper water jacket 6
Dovetail groove type casting copper water jacket 7
Steel plate water jacket 8
Ramming mass 10
High-quality refractory material 11
Surrounding beam 15
Pull rod 17
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention.
An integrated recovery processing furnace 1000 according to an embodiment of the present invention will be described with reference to fig. 1 to 3.
As shown in fig. 1 to 3, the comprehensive recovery processing furnace 1000 according to the embodiment of the invention comprises a hearth 1, an enlarged-section hearth 2, a straight hearth 3, a furnace top 4 and a flue 5, wherein the hearth 1 comprises a hearth side wall 101 and a hearth bottom wall 102, the hearth side wall 101 and the hearth bottom wall 102 jointly define a hearth outlet cavity 103, and a plurality of spray gun ports 106 are arranged on the hearth side wall 101; the expanded section hearth 2 comprises an expanded section hearth side wall 201, the expanded section hearth side wall 201 defines an expanded section hearth 202, the lower end of the expanded section hearth side wall 201 is connected with the upper end of the hearth side wall 101, the horizontal inner diameter dimension of the expanded section hearth 202 is gradually expanded from bottom to top, and the expanded section hearth 202 is horizontally divided into a first expanded section hearth 2021 and a second expanded section hearth 2022 which are communicated with each other; the straight hearth 3 comprises a straight hearth side wall 301, the straight hearth side wall 301 defines a straight hearth cavity 302, and the lower end of the straight hearth side wall 301 is connected with the upper end of the expanded section hearth side wall 201 corresponding to the second expanded section hearth 2022; the furnace roof 4 comprises a first furnace roof 401 covering the top of the first expanded furnace chamber 2021 and a second furnace roof 402 covering the top of the straight furnace chamber 302, and a feed opening 403 is arranged on the second furnace roof 402; the flue 5 is arranged vertically above the second roof 402 and adjacent to the first roof 401.
Specifically, the hearth 1 comprises a hearth side wall 101 and a hearth bottom wall 102, the hearth side wall 101 and the hearth bottom wall 102 jointly define a hearth outlet cavity 103, and a plurality of spray gun ports 106 are arranged on the hearth side wall 101; it can be understood that the slag former, the reducing agent and the secondary resource such as copper-containing sludge, copper-containing solid waste, surface treatment substances and the like are mixed in the hearth cavity 103 and melted to form a molten pool, the spray gun is inserted into a plurality of spray gun ports 106 arranged on the side wall 101 of the hearth, and high-speed oxygen-enriched air and natural gas are sprayed into the molten pool, so that the molten pool can be vigorously stirred, the mass and heat transfer process of the molten pool is enhanced, the comprehensive recovery of the secondary resource and the harmless treatment process of dangerous waste are accelerated, the oxygen-enriched air and the natural gas are combusted in the molten pool to supplement heat for the molten pool, the melting of the materials is accelerated, the reaction atmosphere of the molten pool is controlled by controlling the input amount of the natural gas, and the reduction of valuable metals is promoted. It should be noted that the lance may also inject other more economical solids such as coal dust, semi coke, petroleum coke, etc. into the molten bath.
The expansion section hearth 2 comprises an expansion section hearth side wall 201, the expansion section hearth side wall 201 defines an expansion section hearth 202, the lower end of the expansion section hearth side wall 201 is connected with the upper end of the hearth side wall 101, the horizontal inner diameter of the expansion section hearth 202 is gradually expanded from bottom to top, and the expansion section hearth 202 is divided into a first expansion section hearth 2021 and a second expansion section hearth 2022 which are communicated with each other in the horizontal direction; it can be understood that the enlarged segment furnace chamber 202 is communicated with the furnace chamber 103, so that CO and the like which are not completely combusted in the molten pool can be combusted in the enlarged segment furnace chamber 202, and the horizontal inner diameter of the enlarged segment furnace chamber 202 is gradually enlarged from bottom to top, so that the volume of the enlarged segment furnace chamber 202 is large, and the combustion of the combustible gas is more sufficient.
The straight hearth 3 comprises a straight hearth side wall 301, the straight hearth side wall 301 defines a straight hearth cavity 302, and the lower end of the straight hearth side wall 301 is connected with the upper end of the expanded section hearth side wall 201 corresponding to the second expanded section hearth 2022; it can be understood that the straight furnace chamber 302, the enlarged furnace chamber 202 and the cylinder chamber 103 are communicated, when the combustible gas CO and the like are insufficiently combusted in the enlarged furnace chamber 202, the combustible gas CO and the like can be continuously combusted in the straight furnace chamber 302, and the horizontal inner diameter of the straight furnace chamber 302 is the same as that of the upper part of the enlarged furnace chamber 202, so that the straight furnace chamber 302 has large volume and the combustible gas is more sufficiently combusted; the straight furnace chamber 302 is higher than the first enlarged end furnace chamber, and a high-low furnace chamber is formed in the comprehensive recovery processing furnace 1000, so that the emission of flue gas is more organized, the collection and the emission of flue gas are convenient, and the heat loss in the first enlarged section furnace chamber 2021 caused by the overlarge volume of the first enlarged section furnace chamber 2021 is avoided, and the resource waste is caused.
The furnace roof 4 comprises a first furnace roof 401 covering the top of the first expanded furnace chamber 2021 and a second furnace roof 402 covering the top of the straight furnace chamber 302, and a feed opening 403 is arranged on the second furnace roof 402; it is understood that the slag former, the reducing agent and the secondary resources such as copper-containing sludge, copper-containing solid waste, surface treatment substances and the like are added into the comprehensive recovery processing furnace 1000 through the feed opening 403 arranged on the second furnace top 402 after being proportioned.
The flue 5 is arranged vertically above the second roof 402 and adjacent to the first roof 401. It can be understood that the flue 5 is vertically arranged on the second furnace top 402 and is adjacent to the first furnace top 401, so that the collection and the discharge of flue gas can be facilitated, combustible substances can be combusted to generate flue gas, the flue gas enters the waste heat boiler through the flue 5, waste heat is recovered, and volatile valuable metals such as Zn enter the flue gas system for recovery.
According to the comprehensive recovery processing furnace 1000 of the embodiment of the invention, the working process is as follows: slagging agent, reducing agent and secondary resources such as copper-containing sludge, copper-containing solid waste, surface treatment substances and the like are added into the comprehensive recovery treatment furnace 1000 through a feed opening 403 arranged on a second furnace top 402 after being proportioned, a plurality of spray guns spray high-speed oxygen-enriched air and natural gas into a molten pool, the oxygen-enriched air and the natural gas are vigorously combusted in the molten pool to provide a heat source for melting of the added materials, meanwhile, the reaction atmosphere of the molten pool is controlled through controlling the input amount of the natural gas, the reduction of valuable metals is accelerated, CO and the like which are not completely combusted in the molten pool are combusted in an enlarged segment furnace chamber 202 and a straight furnace chamber 302, flue gas generated by combustion enters a waste heat boiler through a flue 5, the valuable metals such as Cu, Pb and the like are enriched and periodically recovered at the bottom of a furnace cylinder chamber 103, and volatile valuable metals such as Zn and the like enter.
According to the comprehensive recovery processing furnace 1000 of the embodiment of the invention, the horizontal inner diameter of the expansion section furnace chamber 202 is gradually expanded from bottom to top, the horizontal inner diameter of the furnace hearth cavity 103 is the same as the bottom of the expansion section furnace chamber 202, the horizontal inner diameter of the straight furnace chamber 302 is the same as the top of the expansion section furnace chamber 202, the mixture fed from the feed opening 403 is melted in the furnace hearth cavity 103 to form a molten pool, the spray gun sprays high-speed oxygen-enriched air and natural gas into the molten pool, the oxygen-enriched air and natural gas are vigorously combusted in the molten pool to supplement heat to the molten pool, meanwhile, the reaction atmosphere of the molten pool is controlled by controlling the input quantity of natural gas, combustible dangerous waste, CO which is not completely combusted in the molten pool and the like are combusted in the enlarged-section hearth 2 and the straight hearth 3, therefore, the secondary resources and the hazardous wastes can fully react in the comprehensive recovery processing furnace 1000, and the recovery processing efficiency is high; valuable metals such as Cu, Pb and the like are enriched at the bottom of the hearth cavity 103 and are periodically recovered, and volatile valuable metals such as Zn and the like enter the flue 5 and are recovered by a flue gas system, so that the environmental pollution is reduced, and the environment-friendly effect is good. In conclusion, the comprehensive recovery processing furnace 1000 of the embodiment of the invention can recover and process the secondary resources and the hazardous wastes, and has the advantages of high recovery processing efficiency, good recovery processing effect, high economy and good environmental protection effect.
As shown in fig. 1, according to an embodiment of the present invention, the second enlarged section furnace chamber 2022 has a height higher than that of the first enlarged section furnace chamber 2021. It can be understood that the height of the first expanded section furnace chamber 2021 is lower than the height of the second expanded section furnace chamber 2022, a high-low hearth is formed in the comprehensive recovery processing furnace 1000, so that the emission of flue gas is more organized, the collection and emission of flue gas are convenient, the first expanded section furnace chamber 2021 has lower height, the heat loss is small, the temperature is higher, the fluidity of waste residues generated after the reduction of secondary resources, hazardous wastes and the like is higher, and the slag discharge is convenient.
As shown in fig. 2, according to an embodiment of the present invention, the inner bottom surface of the hearth cavity 103 is a concave arc-shaped surface, a V-shaped surface, an inclined surface, or a horizontal surface. It can be understood that when the inner bottom surface of the hearth cavity 103 is a concave arc surface, a V-shaped surface or an inclined surface, the valuable metal can move from high to low along the inner bottom surface of the hearth cavity 103 and accumulate, thereby facilitating the discharge and recovery of the valuable metal.
As shown in fig. 1 and 2, according to an embodiment of the present invention, the hearth chamber 103 is horizontally divided into a first hearth chamber 1031 and a second hearth chamber 1032 connected to each other, wherein the first hearth chamber 1031 is in up-and-down communication with the first enlarged segment furnace chamber 2021, the second hearth chamber 1032 is in up-and-down communication with the second enlarged segment furnace chamber 2022, and an inner bottom surface of the first hearth chamber 1031 is higher than an inner bottom surface of the second hearth chamber 1032. It can be understood that the secondary resources are submerged and combusted in the second hearth chamber 1032, the metal phase generated by the reaction is concentrated on the inner bottom surface of the second hearth chamber 1032, so as to facilitate the discharge and recovery of valuable metals, the inner bottom surface of the first hearth chamber 1031 is higher than the inner bottom surface of the second hearth chamber 1032, and the waste slag is accumulated in the first hearth chamber 1031 and is conveniently discharged.
It should be noted that, the hearth side wall 101 is provided with a plurality of lance holes 106 at two sides of the second hearth cavity 1032, the lances are inserted into the plurality of lance holes 106 at one end of the second hearth cavity 1032, and high-speed oxygen-enriched air and natural gas are injected into the second hearth cavity 1032, so that the molten pool can be vigorously stirred, thereby enhancing the mass and heat transfer process of the molten pool, enabling the secondary resources and hazardous wastes to react more fully in the second hearth cavity 1032, accelerating the comprehensive recovery of the secondary resources and the process of harmless treatment of the hazardous wastes,
according to a further embodiment of the present invention, the hearth side wall 101 is provided with a first slag discharge opening 104 at an end located in the first hearth chamber 1031. Thereby, the slag can be periodically discharged from the first slag discharge port 104.
As shown in fig. 1 and 2, according to a still further embodiment of the present invention, the hearth side wall 101 is further provided with a second slag discharge opening 105 at an end located in the first hearth chamber 1031, and the second slag discharge opening 105 has a height lower than that of the first slag discharge opening 104. It can be understood that when the comprehensive recovery processing furnace 1000 is in normal operation, the slag level is stable, and the waste slag is discharged through the first slag discharge port 104, when the conditions of lance maintenance, emergency shutdown and the like occur, the liquid level of the molten pool needs to be lowered, the slag level is lowered, and at this time, the waste slag needs to be discharged through the second slag discharge port 105 as soon as possible.
According to a still further embodiment of the invention, the side wall of the hearth 1 is provided with two valuable metal tapping openings 107 at one end located in the second furnace chamber. It is understood that the two valuable-metal discharging ports 107 are positioned in parallel and are spare to each other, and when one of the valuable-metal discharging ports 107 is damaged or repaired, the other valuable-metal discharging port 107 can be used to discharge valuable metal in the furnace in time.
According to one embodiment of the invention, the hearth 1 is in the form of a structure lined with high-quality refractory material 11 inside the teeth of the tooth-shaped cast copper water jacket 6. Therefore, the hearth 1 can effectively resist physical scouring caused by high-speed airflow sprayed by the spray gun to the inner wall of the hearth 1 and chemical erosion caused by violent chemical reaction in a molten pool to the inner wall of the hearth 1, the service life of the hearth 1 can be prolonged, the temperatures of the side wall 101 and the bottom wall 102 of the hearth are reduced, overhigh temperature of the furnace body of the comprehensive recovery processing furnace 1000 is avoided, and the working environment is improved.
It should be noted that the hearth 1 may adopt other water-cooling element structural forms, such as a vertical copper water jacket and the like.
According to one embodiment of the invention, the enlarged hearth 2 is constructed by lining the slot of the dovetail casting copper water jacket 7 with high-quality refractory material 11. From this, expand section furnace 2 can keep out the physics that the slag surface fluctuation caused to expand section furnace 2 to erode and the chemical attack that compound in the sediment caused to expand section furnace 2 effectively, can increase the life of expanding section furnace 2, reduce the temperature of expanding section furnace lateral wall 201, avoid synthesizing recovery processing stove 1000 shaft high temperature, improved operational environment.
It should be noted that the enlarged-segment hearth 2 may adopt other water-cooling element structural forms, such as a toothed copper water jacket and the like.
According to one embodiment of the invention, the straight furnace chamber 3, the flue 5 and the furnace roof 4 are all in the form of a steel plate water jacket 8 lined with ramming mass 10. Therefore, the straight hearth 3, the flue 5 and the furnace top 4 can effectively resist the influence of combustible gas combustion on the straight hearth side wall 301, the flue 5 and the furnace top 4, the service lives of the straight hearth 3, the flue 5 and the furnace top 4 can be prolonged, the temperatures of the straight hearth side wall 301, the flue 5 and the furnace top 4 are reduced, the overhigh temperature of the furnace body of the comprehensive recovery processing furnace 1000 is avoided, and the working environment is improved.
It should be noted that gaps among the hearth 1, the expanded section hearth 2 and the straight hearth 3 are reinforced and sealed in a steel plate sealing strip composite packing mode, so that harmful smoke gas is prevented from escaping in the recovery treatment process of hazardous wastes. A flat water jacket 9 is arranged between the side wall 201 of the expanded section hearth and the side wall 301 of the straight hearth, and plays a role in bearing.
According to one embodiment of the invention, the furnace roof 4 is a fully-cast water-cooled furnace roof 4. It can be understood that the integrally-cast water-cooled furnace top 4 can prevent the temperature of the furnace top 4 from being too high, the service life of the furnace top 4 is prolonged, the sealing performance of the integrally-cast water-cooled furnace top 4 is good, harmful dangerous gas in the furnace is prevented from overflowing through gaps of the furnace top 4, and the safety and the environmental protection performance of the comprehensive recovery processing furnace 1000 are improved.
It should be noted that, a nozzle (not shown in the figure) is disposed on the second furnace top 402 for injecting the combustible hazardous waste and the secondary resource such as waste activated carbon, waste organic solvent, etc. into the furnace, and combusting in the expansion furnace chamber 202 and the straight furnace chamber 302 together with the combustible gas such as CO, etc. escaping from the molten pool; the second furnace top 402 is also provided with a secondary air port 18, and a large amount of secondary air such as oxygen-enriched air or compressed air is blown into the secondary air port, so that the combustible hazardous waste is intensively and violently combusted in the expansion section furnace chamber 202 and the straight furnace chamber 302, and the purpose of harmless treatment of the combustible hazardous waste is achieved.
As shown in fig. 1 to 3, according to an embodiment of the present invention, a furnace shell boarding 14 is provided on the outer peripheral side of the hearth 1 and the outer peripheral side of the enlarged-segment hearth 2, and the outer peripheral side of the furnace shell boarding 14 and the outer peripheral side of the straight hearth 3 are correspondingly connected to a plurality of pillars 16 distributed on the outer periphery of the furnace body through a plurality of girts 15. It can be understood that the furnace body includes furnace hearth 1, enlarge section furnace 2, straight furnace 3 and furnace roof 4, stove outer covering bounding wall 14 can strengthen the overall stability of furnace body, avoid the wholeness to reduce when the furnace body is too big, profile of tooth casting copper water jacket 6 and dovetail casting copper water jacket 7 can the direct mount on stove outer covering bounding wall 14, simple to operate is swift, stove inner covering bounding wall 14 can guarantee furnace hearth 1 and the leakproofness of enlarging section furnace 2 part, prevent that harmful hazardous gas in the stove from overflowing through furnace roof 4 gap, improve the security and the feature of environmental protection of comprehensive recovery processing stove 1000. A plurality of girts 15 and a plurality of stand 16 correspond to be connected and form skeleton texture in the furnace body periphery, have improved the rigidity of furnace body.
Preferably, the upright columns 16 at the symmetrical positions are connected through the pull rods 17, the upright columns 16, the surrounding beams 15 and the upright columns 16 are correspondingly connected at the periphery of the furnace body to form an elastic framework structure, and the pull rods 17 have a certain adjustability in the length direction, so that the rigidity of the furnace body is ensured, and meanwhile, certain elasticity is provided, and the stability of the structure of the furnace body after being heated and expanded is ensured.
As shown in fig. 1, according to an embodiment of the present invention, there is further included a bottom beam 12, the bottom beam 12 being located below a hearth bottom wall 102, the hearth bottom wall 102 being supported on the bottom beam 12 to ventilate below the hearth bottom wall 102. Thereby, overheating of the furnace cylinder bottom wall 102 is avoided.
Preferably, the bottom beam 12 is an I-shaped bottom beam 12, and the hearth bottom wall 102 is supported on the I-shaped bottom beam 12, so that the ventilation effect is good, and the hearth bottom wall 102 is prevented from being overheated.
According to an embodiment of the present invention, the furnace further comprises an electrode assembly 13, the electrode assembly 13 is mounted on the first furnace top 401, and one end of the electrode assembly 13 extends into the first enlarged furnace chamber 2021 and the furnace chamber 103. It can be understood that the electrode assembly 13 is used for heating the waste slag when the operation is needed, so that the temperature of the waste slag is increased, the fluidity of the waste slag is good, and the waste slag is convenient to discharge from a slag discharge port.
It should be noted that the heating device is not limited to the electrode assembly 13, and a device for heating the slag may be selected according to actual conditions.
According to an embodiment of the present invention, the second ceiling 402 has an inclined portion extending downward from the far side to the near side toward the lower inlet of the flue 5, with the lower inlet of the flue 5 as a reference, within the vicinity of the outer periphery of the flue 5, so that the height of the portion of the straight cavity 302 within the vicinity of the outer periphery of the flue 5 is gradually reduced from the far side to the near side. It can be understood that the second furnace top 402 is a contraction type furnace top 4, the flue gas enters the flue 5 along the second furnace top 402 and the first furnace top 401, the exhaust organization of the flue gas is good, the collection and the exhaust of the flue gas are convenient, and the comprehensive recovery of valuable elements entering the flue gas is facilitated.
It should be noted that the secondary air port 18 is provided at the flue 5, and a large amount of secondary air such as oxygen-enriched air or compressed air is blown in, so that the combustible gas which is not fully combusted in the enlarged furnace chamber 202 and the straight furnace chamber 302 is vigorously combusted at the flue 5. The flue 5 is a water-cooling large flue 5, so that combustible gas can be fully combusted at the flue 5, the space heat load is controlled, and the influence on the service life of the flue 5 caused by overheating of the flue 5 is avoided. The connecting part of the flue 5 and the furnace top 4 is the throat 501, the design of the strong cooling water-cooling structure beam is adopted at the throat 501, the integral structure strength of the furnace body is ensured, the cooling effect is enhanced, the service life of the comprehensive recovery treatment furnace 1000 is prolonged, and the equipment cost is effectively reduced while the flue gas collection effect is ensured. The periphery of the flue 5 is provided with an independent supporting framework, and the flue 5 is in a relationship with the elastic framework structure through means such as a column 16, a pull rod 17 and the like, so that the structure of the flue 5 can be kept independent to a certain degree, and is tightly combined with the whole furnace body, and the stability of the whole structure of the comprehensive recovery processing furnace 1000 is ensured.
The shape of the flue gas outlet may be square, rectangular, circular or oblong, and the shape of the comprehensive recovery processing furnace 1000 may be rectangular, circular, oblong or bullet-shaped.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (15)
1. An integrated recovery processing furnace, comprising:
the furnace hearth comprises a furnace hearth side wall and a furnace hearth bottom wall, the furnace hearth side wall and the furnace hearth bottom wall jointly define a furnace outlet cavity, and a plurality of spray gun ports are arranged on the furnace hearth side wall;
the expanded section hearth comprises an expanded section hearth side wall, an expanded section furnace chamber is limited by the expanded section hearth side wall, the lower end of the expanded section hearth side wall is connected with the upper end of the hearth side wall, the horizontal inner diameter of the expanded section furnace chamber is gradually expanded from bottom to top, and the expanded section furnace chamber is divided into a first expanded section furnace chamber and a second expanded section furnace chamber which are communicated with each other in the horizontal direction;
the straight hearth comprises a straight hearth side wall, the straight hearth side wall defines a straight furnace chamber, and the lower end of the straight hearth side wall is connected with the upper end of the expanded section hearth side wall corresponding to the second expanded section furnace chamber;
the furnace top comprises a first furnace top covering the top of the first expansion section furnace chamber and a second furnace top covering the top of the straight furnace chamber, and a feed opening is formed in the second furnace top;
a flue vertically disposed on the second roof and adjacent to the first roof.
2. The integrated recovery processing furnace of claim 1, wherein the second enlarged segment furnace chamber has a height greater than a height of the first enlarged segment furnace chamber.
3. The integrated recovery processing furnace of claim 1, wherein the inner bottom surface of the hearth cavity is a concave arc-shaped surface, a V-shaped surface, an inclined surface or a horizontal surface.
4. The integrated recovery processing furnace according to claim 1, wherein the hearth chamber is horizontally divided into a first hearth chamber and a second hearth chamber connected to each other, wherein the first hearth chamber is vertically communicated with the first expansion section furnace chamber, the second hearth chamber is vertically communicated with the second expansion section furnace chamber, and an inner bottom surface of the first hearth chamber is higher than an inner bottom surface of the second hearth chamber.
5. The integrated recovery processing furnace of claim 4, wherein the hearth side wall is provided with a first slag discharge port at an end located in the first hearth chamber.
6. The integrated recovery processing furnace according to claim 5, wherein the hearth side wall is further provided with a second slag discharge port at one end of the first hearth cavity, and the second slag discharge port is lower than the first slag discharge port.
7. The integrated recovery processing furnace of claim 4, wherein the hearth side wall is provided with two valuable metal tapping ports at an end located in the second furnace chamber.
8. The integrated recovery processing furnace of claim 1, wherein the hearth is in the form of a refractory lining the teeth of a toothed cast copper water jacket.
9. The integrated recovery processing furnace of claim 1, wherein the enlarged hearth is constructed by lining the trough of a dovetail casting copper jacket with a high quality refractory material.
10. The integrated recovery processing furnace of claim 1, wherein the straight furnace chamber, the flue and the furnace top are all in the form of a steel plate water jacket lined with ramming mass.
11. The integrated recovery processing furnace of claim 1, wherein the furnace roof is a full-cast water cooled roof.
12. The integrated recovery processing furnace according to claim 1, wherein the outer peripheral side of the hearth and the outer peripheral side of the expanded-section hearth are provided with furnace shell coamings, and the outer peripheral sides of the furnace shell coamings and the outer peripheral side of the straight hearth are correspondingly connected with a plurality of columns distributed on the outer periphery of the furnace body through a plurality of peripheral beams.
13. The integrated recovery processing furnace of claim 1, further comprising a bottom beam positioned below the hearth bottom wall, the hearth bottom wall being supported on the bottom beam for ventilating below the hearth bottom wall.
14. The integrated recovery processing furnace of claim 1, further comprising an electrode assembly mounted on the first roof, one end of the electrode assembly extending into the first expanded section furnace chamber and the hearth chamber.
15. The integrated recovery processing furnace according to claim 1, wherein the second furnace top has an inclined portion extending downward from a distance to a distance within a range near an outer periphery of the flue based on a lower inlet of the flue, so that a height of a portion of the straight furnace chamber within the range near the outer periphery of the flue is gradually reduced from the distance to the distance.
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