CN113416853A - High-temperature steam waste heat recovery treatment process for lead plaster smelting - Google Patents
High-temperature steam waste heat recovery treatment process for lead plaster smelting Download PDFInfo
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- CN113416853A CN113416853A CN202110695441.8A CN202110695441A CN113416853A CN 113416853 A CN113416853 A CN 113416853A CN 202110695441 A CN202110695441 A CN 202110695441A CN 113416853 A CN113416853 A CN 113416853A
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- 238000003723 Smelting Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 title claims abstract description 33
- 239000011505 plaster Substances 0.000 title claims abstract description 30
- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 239000002918 waste heat Substances 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 133
- 238000010438 heat treatment Methods 0.000 claims abstract description 117
- 239000007789 gas Substances 0.000 claims abstract description 81
- 238000001035 drying Methods 0.000 claims abstract description 69
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000013078 crystal Substances 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 31
- 239000000843 powder Substances 0.000 claims description 20
- 238000004140 cleaning Methods 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 17
- 238000007790 scraping Methods 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 238000002425 crystallisation Methods 0.000 claims description 7
- 230000008025 crystallization Effects 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000008236 heating water Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 244000309464 bull Species 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 239000005355 lead glass Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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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
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
- C22B13/025—Recovery from waste materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a high-temperature steam waste heat recovery treatment process for lead plaster smelting, which relates to the technical field of smelting furnace high-temperature steam utilization, and comprises a smelting furnace, a gas collecting box and a negative pressure fan, wherein a feeding device is arranged on one side of the smelting furnace, the negative pressure fan is arranged on one side of the gas collecting box and is communicated with the gas collecting box through a gas pipe, the high-temperature steam waste heat recovery treatment process also comprises a heating pipe sleeve, a heating pipe group and a drying box, and the gas outlet end of the heating pipe sleeve is communicated with the gas inlet end of the heating pipe group through a gas pipe; according to the invention, the heating pipe sleeves are arranged to respectively heat the cold water in the ring sleeve type water tank and the powdery crystalline lead in the tubular shaftless spiral conveyor, and the cold water in the ring sleeve type water tank and the powdery crystalline lead are used for cooling the high-temperature steam, so that the high-temperature steam containing the lead steam is liquefied and re-enters the smelting furnace through the feed back box, and the high-temperature steam is used for evaporating and crystallizing the lead plaster or the lead liquid in the drying box, thereby enhancing the utilization efficiency of the high-temperature steam.
Description
Technical Field
The invention relates to the technical field of smelting furnace high-temperature steam utilization, in particular to a high-temperature steam waste heat recovery treatment process for diachylon smelting.
Background
Since a large amount of waste lead-acid storage batteries enter illegal recovery channels with low processing cost, the phenomena of raw material shortage and no rice coming into a pot of a secondary lead enterprise are frequently reported by media, but statistical data of enterprises in the industry show that the secondary lead enterprise has excess problems along with continuous expansion of scale in recent years besides raw material shortage, and compared with original lead, the secondary lead has high recovery rate, low energy consumption and cost and large resource potential;
in application No. CN 201822051115. The utility model of X provides a secondary lead oxygen-enriched smelting furnace, which mainly comprises a waste heat recovery shell, a waste heat recovery device, a second motor, a second fixed rod, a second rotating shaft, a second bearing, a barrier net, a through hole and a helical blade, the heat in the gap between the waste heat recovery shell and the smelting furnace body is pumped into the conveying cylinder through the waste heat recovery pipeline by the negative pressure exhaust fan, so that the drying of the materials is ensured, however, in the process, because the outer wall of the smelting furnace mainly collects the heat energy outside the smelting furnace and dries the materials in a heat conduction mode, the preheating effect is poor, and when the smelting furnace continuously carries out smelting work, high temperature and high pressure are generated inside the furnace, and the common method is to introduce cold water into an exhaust port of the furnace, because the high-temperature steam inside the furnace contains toxic lead steam, the boiling point of the lead is 1749 ℃, and the melting point of the lead is 327. At the temperature of 5 ℃, lead steam is introduced into water to be cooled, crystallized and filtered, but a large amount of water pollution is generated in the process, high-temperature steam is wasted, and the utilization of energy is wasted;
in view of the above technical drawbacks, a solution is proposed.
Disclosure of Invention
The invention aims to: according to the invention, the heating pipe sleeves are arranged to respectively heat the cold water in the annular water tank and the powdery crystalline lead in the tubular shaftless spiral conveyor, and the cold water in the annular water tank and the powdery crystalline lead are simultaneously utilized to cool the high-temperature steam, so that the high-temperature steam containing lead steam is liquefied and re-enters the smelting furnace through the feed back box, and then the high-temperature steam still carrying a large amount of heat energy after cooling is used for evaporating and crystallizing the lead plaster or lead liquid in the drying box.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-temperature steam waste heat recovery treatment process for lead plaster smelting comprises a smelting furnace, a gas collecting box and a negative pressure fan, wherein a feeding device is arranged on one side of the smelting furnace, the negative pressure fan is arranged on one side of the gas collecting box and is in through connection with the gas collecting box through a gas pipe, the high-temperature steam waste heat recovery treatment process further comprises a heating pipe sleeve, a heating pipe group and a drying box, the gas outlet end of the heating pipe sleeve is in through connection with the gas inlet end of the heating pipe group through a gas pipe, the gas inlet end of the heating pipe sleeve is in through connection with the gas outlet end of the smelting furnace through a gas pipe, the gas outlet end of the heating pipe group is in through connection with the gas inlet end of the gas collecting box through a gas pipe, a tubular shaftless spiral conveyor is fixedly abutted to the inner end of the heating pipe sleeve, the outer end of the heating pipe sleeve is abutted to a loop type water tank, feed back ports are symmetrically arranged on two sides of the heating pipe sleeve, a feed back port of the heating pipe sleeve is in through connection with a feed back box, the feed back box is fixedly arranged at the bottom of the loop type water tank, a feed back port is formed in one side, close to the smelting furnace, of the feed back box, a feed back control switch is fixedly arranged at the feed back port of the feed back box, and the feed back control switch is in through connection with the smelting furnace through a pipeline;
the drying box is internally provided with a partition plate, the heating pipe group is abutted against the lower end of the partition plate, a discharge hole is formed in one side of the drying box, a feeding control switch is arranged at the discharge hole of the drying box, the upper end of the partition plate is in sliding abutting connection with a material pushing assembly, the discharge hole of the feeding control switch is in through connection with a crushing device through a discharge pipe, the discharge end of the crushing device is in through connection with a feed hole of a tubular shaftless spiral conveyor through the discharge pipe, a driving unit is fixedly arranged on one side of the tubular shaftless spiral conveyor, which is far away from the smelting furnace, and the driving unit is in transmission connection with the tubular shaftless spiral conveyor and the crushing device respectively;
the gas pipe between the smelting furnace and the heating pipe sleeve and the gas pipe between the heating pipe sleeve and the heating pipe group are both provided with gas one-way valves, the gas pipe between the negative pressure fan and the gas collecting box is provided with a gas control valve, the top of the annular sleeve type water tank is provided with a water inlet valve, a water replenishing valve and a gas outlet one-way valve, the bottom of the annular sleeve type water tank is provided with a water outlet valve, and the drying box is provided with a feeding control valve and a gas outlet control valve.
Further, the reducing mechanism rotates the initiative bull stick that sets up at crushing incasement including smashing the case and passing through the bearing, the fixed cover in initiative bull stick outer end is equipped with initiative crushing roller and driving gear, the roller bilateral symmetry butt is smashed in the initiative has driven crushing roller, driving gear meshing is connected with the toothed chain, and the meshing of toothed chain both ends is connected with two driven gears, the driven bull stick of driven gear fixedly connected with, the outer end of driven bull stick is located to driven crushing roller fixed cover, the roller is smashed in the initiative and all is equipped with the side leakage prevention baffle with driven crushing roller both sides, side leakage prevention baffle lower extreme through connection has out the hopper, go out hopper and crushing case fixed connection.
Further, the material pushing assembly comprises a first servo motor and a first lead screw fixedly connected with an output shaft of the first servo motor, a material pushing plate penetrates through the first lead screw in a threaded manner, a first slide rod is connected in the material pushing plate in a sliding manner, the first slide rod is fixedly arranged in the drying box, the material pushing plate is abutted against the inner wall of the drying box and is connected with the inner wall of the drying box in a sliding manner, the first lead screw is rotatably arranged in the drying box, and one end of the first lead screw penetrates through a side plate of the drying box to extend to the outside of the drying box and is fixedly connected with the output shaft of the first servo motor.
Further, the drive unit includes second servo motor and the drive bull stick of fixed connection second servo motor output shaft, the fixed cover in drive bull stick outer end is equipped with first gear, first gear engagement is connected with the toothed chain, the toothed chain engagement is connected with the second gear.
Furthermore, the driving rotating rod fixes a rotating shaft of the connecting pipe type shaftless screw conveyor through a bearing, and the second gear is sleeved at the outer end of the driving rotating rod and is fixedly connected with the driving rotating rod.
Further, a cleaning component for cleaning the inner wall of the heating pipe sleeve is arranged in the heating pipe sleeve.
Further, clean subassembly is including the clean second slide bar of scraping the cover and the clean cover of scraping of sliding connection that scrapes of slip setting in the heating pipe cover, and the second slide bar is fixed to be located in the heating pipe cover, clean cover and the butt of heating pipe cover inner wall of scraping, and clean cover threaded connection of scraping has the second lead screw, the second lead screw runs through inside the heating pipe cover and extends to its outside and fixedly connected with third servo motor.
The high-temperature steam waste heat recovery treatment process for lead plaster smelting comprises the following specific process steps:
the method comprises the following steps: feeding, namely conveying solid or powdery raw materials into a smelting furnace through a feeding device, melting the additives by high temperature generated by the working of the smelting furnace, opening a water inlet valve and a water replenishing valve of a ring-shaped water tank, closing a water outlet valve, enabling external water to flow into the ring-shaped water tank through the water inlet valve and the water replenishing valve, then closing the water inlet valve and the water replenishing valve of the ring-shaped water tank, opening a gas outlet one-way valve, opening a feeding control valve of a drying box and closing a feeding control switch to enable lead paste or lead liquid to enter the drying box, and closing the feeding control valve of the drying box after the lead paste or the lead liquid is in a proper amount;
step two: heating water, when the air pressure in the smelting furnace is too high, a gas control valve between a negative pressure fan and a gas collecting box is opened, then the negative pressure fan is opened to generate negative pressure, high-temperature steam in the smelting furnace sequentially enters a heating pipe sleeve, a heating pipe group and a collecting box, the high-temperature steam sequentially heats the heating pipe sleeve and the heating pipe group in the process, the heating pipe sleeve is heated and then respectively heats a tubular shaftless spiral conveyor and a ring-shaped water tank which are abutted against the heating pipe sleeve, the ring-shaped water tank is heated and then heats water in the ring-shaped water tank, a water outlet valve of the ring-shaped water tank is opened after the water in the ring-shaped water tank is heated and is connected into a hot water pipeline system through a pipeline, and then a water replenishing valve is opened to replenish cold water in real time;
step three: heating crystallization, wherein the heating pipe group is heated and then preheats a drying partition plate abutted against the heating pipe group, the drying partition plate is preheated and then heats, dries and evaporates lead plaster or lead liquid in the drying box to form lead block crystallization, the lead plaster or the lead liquid generates water vapor under the action of high temperature, and the water vapor is discharged from a gas outlet control valve of the drying box;
step four: crushing, crystallizing and transporting the lead plaster or lead liquid, after drying and crystallizing, turning on a feeding control switch and a pushing assembly, pushing the lead block crystals to the feeding control switch by the pushing assembly, enabling the lead block crystals to enter a crushing device through the feeding control switch, crushing the lead block crystals into powder by the crushing device, enabling the powder lead block crystals to enter an inner cavity of a tubular shaftless spiral conveyor under the action of gravity, and conveying the powder lead block crystals into a smelting furnace by the operation of the tubular shaftless spiral conveyor;
step five: preheating crystal powder, wherein in the process of conveying the powdery lead block crystals, the tubular shaftless screw conveyor is abutted and heated by the heating pipe sleeve, and the powdery lead block crystals are rotationally dispersed in the conveying process, so that the powdery lead block crystals are in continuous contact with the inner wall of the tubular shaftless screw conveyor, and the powdery lead block crystals are uniformly heated;
step six: the cold water or the lead block crystallized powder is heated by the high-temperature steam firstly, so that the temperature of the high-temperature steam is reduced, lead steam contained in the high-temperature steam is condensed and flows back to be gathered in the material returning box, then the material returning control switch at the material returning box is opened, and the liquefied lead water enters the smelting furnace again.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
(1) according to the invention, the heating pipe sleeves are arranged to respectively heat cold water in the annular water tank and powdered crystalline lead in the tubular shaftless spiral conveyor, and meanwhile, the cold water in the annular water tank and the powdered crystalline lead are used for cooling high-temperature steam, so that the high-temperature steam containing lead steam is liquefied and re-enters the smelting furnace through the feed back box, and then the high-temperature steam still carrying a large amount of heat energy after cooling is used for evaporating and crystallizing lead plaster or lead liquid in the drying box, thus the waste heat recovery treatment of the high-temperature steam is realized, the waste heat is recycled for multiple times, and the utilization efficiency of the high-temperature steam is enhanced;
(2) according to the invention, the cleaning component is arranged to scrape and clean the condensate attached to the inner wall of the heating pipe sleeve and simultaneously actively push the condensate inside the heating pipe sleeve into the feed back box, so that the inside of the heating pipe sleeve is kept clean, and the heating pipe sleeve is more durable.
Drawings
FIG. 1 is a schematic diagram illustrating a high temperature steam treatment process provided according to the present invention;
FIG. 2 shows a schematic view of a heating pipe sleeve provided according to the present invention;
FIG. 3 shows a cross-sectional view of a drying box and a crushing device provided according to the present invention;
fig. 4 shows a schematic view of the internal structure of the crushing apparatus provided according to the present invention.
Illustration of the drawings: 1. a furnace; 101. a feeding device; 2. heating the pipe sleeve; 3. a heating pipe group; 4. a collection box; 401. a negative pressure fan; 5. a drying box; 501. drying the partition board; 502. a feeding control switch; 6. a material pushing assembly; 7. a crushing device; 8. a tubular shaftless screw conveyor; 9. a loop type water tank; 10. returning the material tank; 1001. a feed back control switch; 11. a drive unit; 12. a cleaning assembly; 601. a first servo motor; 602. a material pushing plate; 603. a first lead screw; 604. a first slide bar; 701. a crushing box; 702. an active rotating rod; 703. an active crushing roller; 704. a driving gear; 705. a driven gear; 706. a driven pulverizing roller; 707. a driven rotating rod; 708. a side leakage prevention baffle; 709. a discharge hopper; 1101. a second servo motor; 1102. driving the rotating rod; 1103. a first gear; 1104. a second gear; 1201. cleaning the scraping sleeve; 1202. a second slide bar; 1203. a second lead screw; 1204. and a third servo motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1-4, a high-temperature steam waste heat recovery treatment process for lead plaster smelting comprises a smelting furnace 1, a gas collecting tank, a negative pressure fan 401, a heating pipe sleeve 2, a heating pipe group 3 and a drying tank 5, wherein a feeding device 101 is arranged on one side of the smelting furnace 1, the feeding device 101 is used for feeding solid raw materials, the solid raw materials are lead powder or metal powder or a mixture of lead and metal powder, the smelting furnace 1 is used for smelting the solid raw materials, the negative pressure fan 401 is arranged on one side of the gas collecting tank and is in through connection with the gas collecting tank through a gas pipe, the negative pressure fan 401 is used for actively absorbing high-temperature steam in the smelting furnace 1, the gas outlet end of the heating pipe sleeve 2 is in through connection with the gas inlet end of the heating pipe group 3 through a gas pipe, the gas inlet end of the heating pipe sleeve 2 is in through connection with the gas pipe of the gas collecting tank through a gas pipe, a shaftless screw conveyor 8 is fixed at, the outer end of the heating pipe sleeve 2 is fixedly sleeved with a ring sleeve type water tank 9, the outer end of the heating pipe sleeve 2 is abutted against the ring sleeve type water tank 9, and the heating pipe sleeve 2 is used for simultaneously heating the ring sleeve type water tank 9 and the tubular shaftless spiral conveyor 8 and respectively heating cold water and lead crystal powder in the pipe sleeve type water tank and the tubular shaftless spiral conveyor;
the two sides of the heating pipe sleeve 2 are symmetrically provided with feed back ports, a feed back port of the heating pipe sleeve 2 is in through connection with a feed back box 10, the feed back box 10 is fixedly arranged at the bottom of the outer end of the ring sleeve type water tank 9, one side of the feed back box 10 close to the smelting furnace 1 is provided with the feed back port, the feed back port of the feed back box 10 is fixedly provided with a feed back control switch 1001, the feed back control switch 1001 is in through connection with the smelting furnace 1 through a pipeline, when high-temperature steam transfers heat energy to cold water and lead crystal powder in a heat conduction mode, the cold water and the lead crystal powder are heated, at the moment, the heat energy carried by the high-temperature steam is reduced, the temperature is reduced, then lead in the high-temperature steam containing lead steam is condensed into liquid, then the high-temperature steam cooled to a certain temperature enters the heating pipe group 3 and is evaporated and crystallized for lead paste or lead liquid which is subjected to desulfurization treatment, and solidified lead crystals are obtained;
a partition board is arranged in the drying box 5, the heating pipe group 3 is abutted against the lower end of the partition board, a discharge port is formed in one side of the drying box 5, a feeding control switch 502 is arranged at the discharge port of the drying box 5, a material pushing assembly 6 for pushing lead block crystals to the discharge port of the drying box 5 is abutted against the upper end of the partition board in a sliding manner, a crushing device 7 for crushing the lead block crystals is connected to the discharge port of the feeding control switch 502 through a discharge pipe in a penetrating manner, the discharge end of the crushing device 7 is connected with a feed port of a tubular shaftless screw conveyor 8 through a discharge pipe in a penetrating manner, a driving unit 11 is fixedly arranged on one side of the tubular shaftless screw conveyor 8 far away from the smelting furnace 1, the driving unit 11 is respectively in transmission connection with the tubular shaftless screw conveyor 8 and the crushing device 7, the driving unit 11 is used for driving the tubular shaftless screw conveyor 8 and the crushing device 7 simultaneously, and the crushing device 7 is used for crushing the solidified lead crystals, the tubular shaftless screw conveyor 8 is used for conveying crushed lead crystals;
a gas one-way valve is arranged on a gas pipe between the smelting furnace 1 and the heating pipe sleeve 2 and a gas pipe between the heating pipe sleeve 2 and the heating pipe group 3, the gas one-way valve prevents gas from flowing back, a gas control valve is arranged on a gas pipe between the negative pressure fan 401 and the gas collecting tank, the gas control valve controls the gas collecting tank to be communicated with external air, the top of the ring-shaped water tank 9 is provided with a water inlet valve, a water replenishing valve and a gas outlet one-way valve, the bottom of the ring-shaped water tank 9 is provided with a water outlet valve, the water inlet valve is used for quickly supplying water into the ring-shaped water tank 9, the water outlet valve is used for controlling the circulation with a hot water pipeline system, the gas outlet one-way valve is used for discharging gas from the inside of the ring-shaped water tank 9 when water is supplied or heated, the gas outlet one-way valve is used for discharging gas from the inside and is not communicated with the external air, the drying box 5 is provided with a feeding control valve and a gas outlet control valve, the feeding control valve is used for controlling feeding and stopping feeding, the air outlet control valve controls the exchange of the drying box 5 and the outside air;
the material pushing assembly 6 comprises a first servo motor 601 and a first screw 603 fixedly connected with an output shaft of the first servo motor 601, a material pushing plate 602 penetrates through the first screw 603 in a threaded manner, a first slide bar 604 is connected in the material pushing plate 602 in a sliding manner, the first slide bar 604 is fixedly arranged in the drying box 5, the material pushing plate 602 is abutted against and is connected with the inner wall of the drying box 5 in a sliding manner, the first screw 603 is rotatably arranged in the drying box 5, and one end of the first screw 603 penetrates through a side plate of the drying box 5 and extends to the outside of the drying box and is fixedly connected with the output shaft of the first servo motor 601;
when lead plaster or lead liquid in the drying box 5 is dried, crystallized and solidified, the external control component controls the first servo motor 601 to work, the output shaft of the first servo motor 601 works to rotate in the forward direction to drive the first lead screw 603 fixed with the first servo motor to rotate, the first lead screw 603 rotates to drive the material pushing plate 602 in threaded connection with the first lead screw to move, the material pushing plate 602 moves to push the crystallized lead on the partition plate in the drying box 5 into the crushing device 7 through the material loading control switch 502, and then the external control component controls the first servo motor 601 to work to enable the output shaft of the first servo motor to rotate in the reverse direction and drive the first lead screw 603 fixed with the first servo motor to rotate in the reverse direction, so that the material pushing plate 602 resets;
the crushing device 7 comprises a crushing box 701 and a driving rotating rod 702 which is rotatably arranged in the crushing box 701 through a bearing, a driving crushing roller 703 and a driving gear 704 are fixedly sleeved at the outer end of the driving rotating rod 702, driven crushing rollers 706 are symmetrically abutted to two sides of the driving crushing roller 703, a toothed chain is meshed with the driving gear 704, two driven gears 705 are meshed with two ends of the toothed chain, a driven rotating rod 707 is fixedly connected with the driven gear 705, the driven crushing rollers 706 are fixedly sleeved at the outer end of the driven rotating rod 707, side leakage prevention baffles 708 are respectively arranged at two sides of the driving crushing roller 703 and the driven crushing rollers 706, a discharge hopper 709 is connected at the lower end of each side leakage prevention baffle 708 in a penetrating way, the discharge hopper 709 is fixedly connected with the crushing box 701, a driving unit 11 comprises a second servo motor 1101 and a driving rotating rod 1102 fixedly connected with an output shaft of the second servo motor 1101, a first gear 1103 is fixedly sleeved at the outer end of the driving rotating rod 1102, and a toothed chain is meshed with the first gear 1103, the toothed chain is engaged with a second gear 1104, the driving rotating rod 1102 is fixedly connected with a rotating shaft of the shaftless spiral conveyor 8 through a bearing, and the second gear 1104 is sleeved at the outer end of the driving rotating rod 702 and is fixedly connected with the driving rotating rod;
when the crystalline lead enters the crushing box 701, the external control component controls a second servo motor 1101 to work, the second servo motor 1101 works to enable an output shaft of the second servo motor to drive a driving rotating rod 1102 fixed with the second servo motor to rotate, the driving rotating rod 1102 rotates to drive a tubular shaftless screw conveyor 8 fixed with a rotating shaft of the second servo motor to work, meanwhile, the rotating rod rotates to drive a first gear 1103 fixedly sleeved with the rotating rod to rotate, the first gear 1103 drives a second gear 1104 to rotate through a toothed chain, the second gear 1104 rotates to drive a driving rotating rod 702 fixed with the second gear 1104 to rotate, the driving rotating rod 702 rotates to drive a driving crushing roller 703 and a driving gear 704 fixed with the driving rotating rod to rotate, the driving gear 704 rotates to drive two driven gears through the toothed chain, the driven gears 705 rotate to drive driven crushing rollers 706 to rotate, the driven crushing rollers 706 rotate to be matched with the driving crushing roller 703 to crush the crystalline lead into powder 705, then the powdery crystalline lead enters the tubular shaftless screw conveyor 8, and then the powdery crystalline lead is heated and conveyed in the tubular shaftless screw conveyor 8;
the process comprises the following steps: when the drying box is used, solid or powder raw materials (additives are solid metal or lead crystals or a mixture of the solid metal or the lead crystals) are conveyed into the melting furnace 1 through the feeding device 101, the melting furnace 1 generates high temperature when working to melt the additives, a water inlet valve and a water replenishing valve of the loop-shaped water tank 9 are opened, a water outlet valve is closed, external water flows into the loop-shaped water tank 9 through the water inlet valve and the water replenishing valve at the moment, then the water inlet valve and the water replenishing valve of the loop-shaped water tank 9 are closed, an air outlet one-way valve is opened, a feeding control valve of the drying box 5 is opened, a feeding control switch 502 is closed, lead plaster or lead liquid after desulfurization treatment enters the drying box 5, and the feeding control valve of the drying box 5 is closed after a proper amount of the lead plaster or;
heating water, when the air pressure in the smelting furnace 1 is too high, a gas control valve between a negative pressure fan 401 and a gas collecting tank is opened, then the negative pressure fan 401 is opened to generate negative pressure, high-temperature steam in the smelting furnace 1 sequentially enters a heating pipe sleeve 2, a heating pipe group 3 and a collecting tank 4, the heating pipe sleeve 2 and the heating pipe group 3 are sequentially heated by the high-temperature steam in the process, the heating pipe sleeve 2 is heated and then respectively heats a tubular shaftless spiral conveyor 8 and a ring-shaped water tank 9 which are abutted against the heating pipe sleeve 2, the ring-shaped water tank 9 is heated and then heats water in the ring-shaped water tank, after the water in the ring-shaped water tank is heated, an outlet valve of the ring-shaped water tank 9 is opened, the hot water pipeline system is connected into the ring-shaped water tank through a pipeline, and then a water replenishing valve is opened to replenish cold water in the ring-shaped water in real time;
heating crystallization, wherein the heating pipe group 3 is heated and then preheats the drying partition plate 501 abutted against the heating pipe group, the drying partition plate 501 is preheated and then heats, dries and evaporates lead plaster or lead liquid in the drying box 5 to form lead block crystallization, the lead plaster or lead liquid generates steam under the action of high temperature, and the steam is discharged from a gas outlet control valve of the drying box 5;
crushing crystals and conveying the crystals, wherein after drying and crystallizing lead plaster or lead liquid, a feeding control switch 502 and a pushing assembly 6 are turned on, the pushing assembly 6 pushes lead block crystals to the feeding control switch 502, the lead block crystals enter a crushing device 7 through the feeding control switch 502, then the lead block crystals are crushed into powder by the crushing device 7, the powdery lead block crystals enter an inner cavity of a tubular shaftless spiral conveyor 8 under the action of gravity, and the tubular shaftless spiral conveyor 8 works to convey the powdery lead block crystals into a smelting furnace 1;
preheating crystal powder, wherein in the process of conveying the powdery lead block crystals, the tubular shaftless screw conveyor 8 is already abutted and heated by the heating pipe sleeve 2, and the powdery lead block crystals are rotationally dispersed in the conveying process, so that the powdery lead block crystals are in continuous contact with the inner wall of the tubular shaftless screw conveyor 8, and the powdery lead block crystals are uniformly heated;
the working principle is as follows: the cold water of the ring sleeve type water tank 9 and the powdery crystalline lead in the tubular shaftless spiral conveyor 8 are respectively heated by arranging the heating pipe sleeve 2, meanwhile, the cold water of the ring sleeve type water tank 9 and the powdery crystalline lead are utilized to cool the high-temperature steam, the high-temperature steam containing the lead steam is liquefied and re-enters the smelting furnace 1 through the material return box 10, then the high-temperature steam still carrying a large amount of heat energy after cooling is evaporated and crystallized for lead plaster or lead liquid in the drying box 5, the waste heat recovery treatment of the high-temperature steam is realized, the waste heat is recycled for multiple times, and the utilization efficiency of the high-temperature steam is enhanced.
Example 2:
in example 1, the waste heat recovery process of the high temperature steam of the melting furnace 1 at the time of melting the lead paste was completed, but in this process, lead vapor is contained in the high temperature steam, lead which is a toxic substance cannot be directly discharged to the air, so cold water and the powdered lead nugget crystals are heated by the high temperature steam containing lead vapor, so that the temperature of the high temperature steam is lowered, and the lead vapor is liquefied and then collected in the return bin 10, and then the return control switch at the return bin 10 is opened, and the liquefied lead water is re-introduced into the melting furnace 1, but in this process, due to liquefaction of the lead vapor, the lead water is easily attached to the inner wall of the heating mantle 2, and is not easily flowed by the lead water, and when the apparatus is cooled, the lead water is solidified on the inner wall of the heating mantle 2 to be used next time, the efficiency of the heat conduction thereof is lowered, and when it is solidified on the inner wall of the heating mantle 2 many times, the inner wall thereof may be internally blocked, the equipment is difficult to use, so that the equipment needs to be replaced, and the operation cost of enterprises is increased;
as shown in fig. 2, a cleaning assembly 12 for cleaning the inner wall of the heating pipe casing 2 is provided therein. The cleaning assembly 12 comprises a cleaning scraping sleeve 1201 arranged in the heating pipe sleeve 2 in a sliding mode and a second sliding rod 1202 connected with the cleaning scraping sleeve 1201 in a sliding mode, the second sliding rod 1202 is fixedly arranged in the heating pipe sleeve 2, the cleaning scraping sleeve 1201 is abutted to the inner wall of the heating pipe sleeve 2, the cleaning scraping sleeve 1201 is in threaded connection with a second screw rod 1203, and the second screw rod 1203 penetrates through the inside of the heating pipe sleeve 2, extends to the outside of the heating pipe sleeve 2 and is fixedly connected with a third servo motor 1204;
the working principle is as follows: during the use, the work of third servo motor 1204 is controlled to external control subassembly, the output shaft of third servo motor 1204 drives and rotates rather than fixed second lead screw 1203, second lead screw 1203 threaded connection is clean scrape the cover 1201 and connect and clean scraping the cover 1201 butt heating pipe box 2 inner wall, make clean scraping the cover 1201 reciprocal slip in heating pipe box 2 and scrape the inner wall of heating pipe box 2, thereby with the unliquefied lead liquid attaching to the inner wall of heating pipe box 2, and with it promote in feed back box 10, strengthen the heat-conducting efficiency of heating pipe box 2.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (8)
1. A high-temperature steam waste heat recovery treatment process for lead plaster smelting comprises a smelting furnace (1), a gas collecting tank and a negative pressure fan (401), wherein a feeding device (101) is arranged on one side of the smelting furnace (1), the negative pressure fan (401) is arranged on one side of the gas collecting tank and is in through connection with the gas collecting tank through a gas pipe, the high-temperature steam waste heat recovery treatment process is characterized by further comprising a heating pipe sleeve (2), a heating pipe group (3) and a drying tank (5), the gas outlet end of the heating pipe sleeve (2) is in through connection with the gas inlet end of the heating pipe group (3) through a gas pipe, the gas inlet end of the heating pipe sleeve (2) is in through connection with the gas outlet end of the smelting furnace (1) through a gas pipe, the gas outlet end of the heating pipe group (3) is in through connection with the gas inlet end of the gas collecting tank through a gas pipe, a tubular shaftless spiral conveyor (8) is fixedly abutted to the inner end of the heating pipe sleeve (2), and an annular water tank (9) is abutted to the outer end of the heating pipe sleeve (2), feed back ports are symmetrically formed in two sides of the heating pipe sleeve (2), a feed back port of the heating pipe sleeve (2) is connected with a feed back box (10) in a penetrating mode, the feed back box (10) is fixedly arranged at the bottom of the outer end of the annular sleeve type water tank (9), a feed back port is formed in one side, close to the smelting furnace (1), of the feed back box (10), a feed back control switch (1001) is fixedly arranged at the feed back port of the feed back box (10), and the feed back control switch (1001) is connected with the smelting furnace (1) in a penetrating mode through a pipeline;
a partition plate is arranged in the drying box (5), the heating pipe group (3) is abutted against the lower end of the partition plate, a discharge hole is formed in one side of the drying box (5), a feeding control switch (502) is arranged at the discharge hole of the drying box (5), a material pushing assembly (6) is slidably abutted against the upper end of the partition plate, the discharge hole of the feeding control switch (502) is in through connection with a crushing device (7) through a discharge pipe, the discharge end of the crushing device (7) is in through connection with a feed hole of a tubular shaftless spiral conveyor (8) through a discharge pipe, a driving unit (11) is fixedly arranged on one side, away from the smelting furnace (1), of the tubular shaftless spiral conveyor (8), and the driving unit (11) is in transmission connection with the tubular shaftless spiral conveyor (8) and the crushing device (7) respectively;
the air pipe between the smelting furnace (1) and the heating pipe sleeve (2) and the air pipe between the heating pipe sleeve (2) and the heating pipe group (3) are provided with air one-way valves, the air pipe between the negative pressure fan (401) and the air collecting box is provided with an air control valve, the top of the annular water tank (9) is provided with a water inlet valve, a water supplementing valve and an air outlet one-way valve, the bottom of the annular water tank (9) is provided with a water outlet valve, and the drying box (5) is provided with a feeding control valve and an air outlet control valve.
2. The high-temperature steam waste heat recovery treatment process for lead plaster smelting as claimed in claim 1, wherein the crushing device (7) comprises a crushing box (701) and a driving rotating rod (702) rotatably arranged in the crushing box (701) through a bearing, a driving crushing roller (703) and a driving gear (704) are fixedly sleeved at the outer end of the driving rotating rod (702), driven crushing rollers (706) are symmetrically abutted against two sides of the driving crushing roller (703), a toothed chain is engaged and connected with the driving gear (704), two ends of the toothed chain are engaged and connected with two driven gears (705), the driven gears (705) are fixedly connected with driven rotating rods (707), the driven crushing rollers (706) are fixedly sleeved at the outer ends of the driven rotating rods (707), side leakage prevention baffles (708) are arranged at two sides of the driving crushing roller (703) and the driven crushing roller (706), the lower end of the side leakage prevention baffle (708) is connected with a discharge hopper (709) in a penetrating way, and the discharge hopper (709) is fixedly connected with the crushing box (701).
3. The high-temperature steam waste heat recovery treatment process for lead plaster smelting according to claim 1, wherein the material pushing assembly (6) comprises a first servo motor (601) and a first lead screw (603) fixedly connected with an output shaft of the first servo motor (601), a material pushing plate (602) penetrates through the first lead screw (603), a first sliding rod (604) is connected in the material pushing plate (602) in a sliding manner, the first sliding rod (604) is fixedly arranged in the drying box (5), the material pushing plate (602) is abutted against and connected with the inner wall of the drying box (5) in a sliding manner, the first lead screw (603) is rotatably arranged in the drying box (5), and one end of the first lead screw (603) penetrates through a side plate of the drying box (5) to extend to the outside of the drying box and is fixedly connected with the output shaft of the first servo motor (601).
4. The high-temperature steam waste heat recovery treatment process for lead plaster smelting is characterized in that the driving unit (11) comprises a second servo motor (1101) and a driving rotating rod (1102) fixedly connected with an output shaft of the second servo motor (1101), a first gear (1103) is fixedly sleeved at the outer end of the driving rotating rod (1102), the first gear (1103) is in meshed connection with a toothed chain, and the toothed chain is in meshed connection with a second gear (1104).
5. The high-temperature steam waste heat recovery treatment process for lead plaster smelting as claimed in claim 1, wherein the driving rotating rod (1102) is fixedly connected with a rotating shaft of the tubular shaftless screw conveyor (8) through a bearing, and the second gear (1104) is sleeved on the outer end of the driving rotating rod (702) and is fixedly connected with the driving rotating rod.
6. The high-temperature steam waste heat recovery treatment process for lead plaster smelting according to claim 1, characterized in that a cleaning component (12) for cleaning the inner wall of the heating pipe sleeve (2) is arranged in the heating pipe sleeve.
7. The high-temperature steam waste heat recovery treatment process for the lead plaster smelting according to claim 6, characterized in that the cleaning assembly (12) comprises a cleaning scraping sleeve (1201) which is slidably arranged in the heating pipe sleeve (2) and a second sliding rod (1202) which is slidably connected with the cleaning scraping sleeve (1201), the second sliding rod (1202) is fixedly arranged in the heating pipe sleeve (2), the cleaning scraping sleeve (1201) is abutted to the inner wall of the heating pipe sleeve (2), the cleaning scraping sleeve (1201) is in threaded connection with a second lead screw (1203), and the second lead screw (1203) penetrates through the inside of the heating pipe sleeve (2) and extends to the outside of the heating pipe sleeve and is fixedly connected with a third servo motor (1204).
8. The high-temperature steam waste heat recovery treatment process for diachylon smelting according to claim 1, which is characterized by comprising the following specific process steps:
the method comprises the following steps: feeding, namely conveying solid or powder raw materials into a smelting furnace (1) through a feeding device (101), melting the additives by the high temperature generated by the operation of the smelting furnace (1), opening a water inlet valve and a water replenishing valve of an annular water tank (9), closing a water outlet valve, enabling external water to flow into the annular water tank (9) through the water inlet valve and the water replenishing valve, then closing the water inlet valve and the water replenishing valve of the annular water tank (9) and opening a gas outlet one-way valve, opening a feeding control valve of a drying box (5) and closing a feeding control switch (502), enabling lead paste or lead liquid to enter the drying box (5), and closing the feeding control valve of the drying box (5) after a proper amount of the lead paste or the lead liquid;
step two: heating water, when the air pressure in the smelting furnace (1) is too high, a gas control valve between a negative pressure fan (401) and a gas collecting box is opened, then the negative pressure fan (401) is opened to generate negative pressure, high-temperature steam in the smelting furnace (1) sequentially enters a heating pipe sleeve (2), a heating pipe group (3) and a collecting box (4), the heating pipe sleeve (2) and the heating pipe group (3) are sequentially heated by the high-temperature steam in the process, the heating pipe sleeve (2) is heated and then respectively heats a tubular shaftless spiral conveyor (8) and a ring sleeve type water tank (9) which are abutted against the heating pipe sleeve, the water in the ring sleeve type water tank (9) is heated, a water outlet valve of the ring sleeve type water tank (9) is opened after the water in the ring sleeve type water tank is heated, the hot water pipeline system is connected into the ring sleeve type water tank through a pipeline, and then a water replenishing valve is opened to replenish cold water in the ring sleeve in real time;
step three: heating crystallization, wherein the heating pipe set (3) is heated and then preheats the drying partition plate (501) abutted against the heating pipe set, the drying partition plate (501) is preheated and then heats, dries and evaporates lead plaster or lead liquid in the drying box (5) to form lead block crystallization, the lead plaster or lead liquid generates water vapor under the action of high temperature, and the water vapor is discharged from a gas outlet control valve of the drying box (5);
step four: crushing and crystallizing and transporting the lead plaster or lead liquid, after the drying and crystallization of the lead plaster or the lead liquid are finished, opening a feeding control switch (502) and a pushing assembly (6), pushing the lead block crystals to the feeding control switch (502) by the pushing assembly (6), enabling the lead block crystals to enter a crushing device (7) through the feeding control switch (502), crushing the lead block crystals into powder by the crushing device (7), enabling the powder lead block crystals to enter an inner cavity of a tubular shaftless spiral conveyor (8) under the action of gravity, and conveying the powder lead block crystals into a smelting furnace (1) by the tubular shaftless spiral conveyor (8) in a working mode;
step five: preheating crystal powder, wherein in the process of conveying the powdery lead block crystals, the tubular shaftless screw conveyor (8) is abutted and heated by the heating pipe sleeve (2), and the powdery lead block crystals are rotationally dispersed in the conveying process, so that the powdery lead block crystals are in continuous contact with the inner wall of the tubular shaftless screw conveyor (8), and the powdery lead block crystals are uniformly heated;
step six: because the high-temperature steam firstly heats the cold water or the lead block crystallized powder, the temperature of the high-temperature steam is reduced, lead steam contained in the high-temperature steam is condensed and flows back to the material returning box (10), then the material returning control switch (1001) at the material returning box (10) is opened, and the liquefied lead water enters the smelting furnace (1) again.
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| CN212538850U (en) * | 2020-07-21 | 2021-02-12 | 贵溪三元金属有限公司 | Waste heat utilization device in secondary lead smelting process |
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| GB812837A (en) * | 1957-01-14 | 1959-05-06 | Nat Smelting Co Ltd | Improvements in or relating to cooling arrangements for molten lead |
| US4878654A (en) * | 1986-09-02 | 1989-11-07 | Snamprogetti S.P.A. | Method for cooling gases and/or vapors from non-ferrous metal treatment plants, and the relative apparatus |
| JP2005233542A (en) * | 2004-02-20 | 2005-09-02 | Nippon Electric Glass Co Ltd | Exhaust heat recovery-type melting furnace |
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Denomination of invention: A high-temperature steam waste heat recovery process for lead paste smelting Granted publication date: 20220722 Pledgee: Anhui Taihe rural commercial bank Limited by Share Ltd. Pledgor: TAIHE DAHUA ENERGY TECHNOLOGY CO.,LTD. Registration number: Y2024980029615 |
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