CN216954090U

CN216954090U - Alumina calcination waste heat recovery utilizes device

Info

Publication number: CN216954090U
Application number: CN202220495400.4U
Authority: CN
Inventors: 于水波; 刘吉; 岳玲; 邢苗苗; 周庆伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-07-12
Anticipated expiration: 2032-03-09

Abstract

The utility model discloses an alumina roasting waste heat recycling device which comprises a roasting furnace, a waste heat utilization box and a water storage tank, wherein the upper end of the roasting furnace is provided with the waste heat utilization box through a smoke conveying pipe in a communicating mode, the waste heat utilization box is composed of a waste heat absorption cavity, a heat exchange mechanism, a smoke dust filtering drawer and a smoke exhaust pipe, the waste heat absorption cavity is formed in the waste heat utilization box, the heat exchange mechanism is arranged in the waste heat absorption cavity, the smoke dust filtering drawer is installed at the upper end of the inner portion of the waste heat utilization box in a pulling and embedding mode, the side end of the waste heat absorption cavity is provided with the smoke exhaust pipe in a communicating mode, and the smoke exhaust pipe is provided with a smoke discharge valve. The utilization rate of the flue gas waste heat in the furnace is high, the flue gas waste heat can be fully recycled, the energy utilization rate is improved, the flue gas generated by burning in the roasting furnace can be purified and filtered, and the environmental protection efficiency is high.

Description

Alumina calcination waste heat recovery utilizes device

Technical Field

The utility model relates to the technical field of industrial production, in particular to an alumina roasting waste heat recycling device.

Background

Aluminum hydroxide crystals are calcined to produce alumina, which is a conventional way of producing alumina. Large scale alumina production sites often have large production facilities. Although these large-scale production facilities can meet the requirements for mass production of alumina, the manufacturing, operation and maintenance costs of the large-scale facilities are enormous, which is not conducive to miniaturization and flexible production methods. When the demand of alumina production is reduced, the miniaturized alumina production equipment can be more suitable for the market demand. In addition, the production cost of small-scale alumina is not required to be too large, small enterprises can pay for the production, the development of the small enterprises is facilitated, a large amount of waste heat is generated in the roasting process of the alumina, the waste heat is not utilized, a large amount of heat energy is wasted, and energy conservation and emission reduction are not facilitated.

Patent No. CN211527128U discloses an alumina roasting waste heat recycling device, which comprises a roasting furnace, wherein the top of the roasting furnace is provided with an exhaust port, the exhaust port is connected with one end of an air inlet pipeline, the other end of the exhaust pipeline is connected with a piston chamber, a piston is embedded in the piston chamber, the piston is rotatably connected with a support rod, the support rod is rotatably connected with a driving wheel, the driving wheel is rotatably connected with a generator, the generator is electrically connected with a heating device, the top of the piston chamber is connected with one end of a circulating pipeline, the circulating pipeline penetrates through the heating device, the tail end of the circulating pipeline is connected with one side of the piston chamber, the bottom of the piston chamber is provided with an exhaust pipeline, one-way valves are arranged in the exhaust pipeline and the air inlet pipeline, a large amount of smoke dust and hot steam can be generated in the roasting process, heat energy is converted into electric energy through the utility model, the electric energy is transferred to the roasting furnace, the energy consumption of the roasting furnace is greatly reduced, the waste heat in the roasting furnace is utilized when in the roasting process, not only is environment-friendly, but also reduces the waste of energy.

This aluminium oxide calcination waste heat recovery utilizes device has following drawback: 1. the utilization rate of the flue gas waste heat in the furnace is low, the flue gas waste heat cannot be fully recycled, and the energy utilization rate is reduced; 2. the flue gas generated by burning in the roasting furnace can not be purified and filtered, and the environmental protection efficiency is low. Therefore, the device for recycling the waste heat generated by roasting the alumina is provided.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an alumina roasting waste heat recycling device which can effectively solve the problems in the background technology.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides an alumina calcination waste heat recovery utilizes device, includes the burning furnace of burning, still includes waste heat utilization case and water storage tank, the burning furnace upper end is burned and still installs the waste heat utilization case through defeated tobacco pipe intercommunication, the waste heat utilization case specifically is filtered the steamer tray and is discharged fume the pipe by waste heat absorption chamber, heat transfer mechanism ware, smoke and dust and constitute, the waste heat absorption incasement portion has seted up the waste heat absorption chamber, the inside heat transfer mechanism ware of installing of waste heat absorption chamber, the inside upper end pull of waste heat utilization incasement portion is inlayed and is installed the smoke and dust and filter the steamer tray, waste heat absorption chamber side end intercommunication is installed and is discharged fume the pipe, discharge fume and install on the pipe and put the smoke valve.

Furthermore, a rotating machine shaft is arranged in the center of the inside of the water storage tank, a spiral rack is arranged on the rotating machine shaft, the upper end of the rotating machine shaft is connected and arranged with a rotating motor outside the top end of the water storage tank, and the upper end and the lower end of the left side wall of the water storage tank are respectively provided with a water conveying port and a water inlet; the water storage tank is used for mixing cold water and hot water in a meeting manner and carrying out heat preservation and temporary storage.

Further, a temperature return furnace top is welded at the top end of the roasting furnace, a smoke conveying pipe is communicated with the upper end of the temperature return furnace top, a smoke exhaust pipe communicated with the waste heat utilization box is embedded into the smoke purification box, a certain amount of purification washing liquid is injected into the smoke purification box, the purification washing liquid is not controlled by the smoke exhaust pipe, and a smoke exhaust port is formed in the right side of the smoke purification box; the back-temperature furnace top adopts the inverted cone design, can accumulate the flue gas waste heat and back-heat in the roasting furnace, and improves the energy utilization rate.

Furthermore, a plurality of communicated heat and water drawing pipes are arranged on the heat exchange mechanism, water liquid circulating pipe openings are formed in the upper end and the lower end of the right side of the heat exchange mechanism, the water liquid circulating pipe openings are respectively communicated with a circulating drainage pump and a circulating water conveying pump, and the circulating drainage pump and the circulating water conveying pump are both communicated with a water storage tank; the heat exchange mechanism is used for drawing waste heat in the flue gas to heat the water liquid inside, and energy consumption is reduced.

Furthermore, a pump rotary shaft is arranged in the center of the interior of the circulating water discharge pump, a pump rotary vane is arranged on the pump rotary shaft, two ends of the circulating water discharge pump are communicated with pump pipes, and the circulating water delivery pump and the circulating water discharge pump are identical in structure; the circulating water discharge pump and the circulating water conveying pump are used for circularly conveying and heating the water liquid in the water storage tank.

Furthermore, a drawer frame is mounted on the smoke dust filtering drawer, a stainless steel dust collecting net is mounted inside the drawer frame, a frame plate is mounted at the right end of the drawer frame, and a drawer handle is mounted on the frame plate; the smoke and dust filter steamer tray is arranged in filtering the accumulation to the smoke and dust that contains in the flue gas, is convenient for concentrate the clearance, has improved clean efficiency.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model is provided with the temperature return furnace top, the waste heat utilization box and the water storage tank, when the roasting furnace is used for roasting alumina raw materials, smoke can be generated and rises, the temperature return furnace top is arranged at the upper end of the roasting furnace, the temperature return furnace top adopts an inverted cone design, part of smoke waste heat can be accumulated and heated in the roasting furnace, the energy utilization rate is improved, the smoke can be input into the waste heat utilization box through the smoke transmission pipe, the heat exchange mechanism is arranged in the waste heat absorption cavity of the waste heat utilization box, the heat exchange mechanism is communicated with the water storage tank through the circulating water discharge pump and the circulating water delivery pump, the circulating water discharge pump and the circulating water delivery pump are electrified to work, water in the water storage tank is circularly delivered and flows to the water suction pipe of the heat exchange mechanism, the water suction pipe absorbs the smoke waste heat in the waste heat utilization box, and the circulating water in the heating pipe flows due to the circulating delivery of the circulating water discharge pump and the circulating water delivery pump, can carry out cold and hot interaction to the water liquid in the water storage tank, the rapid heating absorbs the flue gas waste heat, so, to flue gas waste heat utilization rate height in the stove, can make full use of flue gas waste heat, improved energy utilization.

2. According to the utility model, the smoke dust filtering drawer and the smoke purifying box are arranged, when smoke in the roasting furnace is conveyed into the waste heat utilization box through the smoke conveying pipe, large-particle smoke dust substances contained in the smoke are firstly filtered through the smoke dust filtering drawer, then the smoke discharging valve is unscrewed, the smoke filtered in the waste heat utilization box is conveyed into the smoke purifying box through the smoke discharging pipe, a certain amount of purifying washing liquid is injected into the smoke purifying box, the pipe opening of the smoke discharging pipe is immersed into the purifying washing liquid, the smoke is firstly washed through the purifying washing liquid, and toxic gases and substances contained in the smoke are removed, so that the smoke generated by combustion of the roasting furnace can be purified and filtered, and the environment-friendly efficiency is high.

Drawings

FIG. 1 is a schematic view of the overall structure of an alumina calcination waste heat recovery device according to the present invention;

FIG. 2 is a schematic structural view of a water storage tank of the device for recycling waste heat generated in the roasting of alumina according to the present invention;

FIG. 3 is a schematic diagram of a recycling pump of the waste heat recycling device for alumina calcination according to the present invention;

FIG. 4 is a schematic structural view of a heat exchange mechanism of the device for recycling waste heat from alumina calcination according to the present invention;

FIG. 5 is a schematic structural view of a smoke and dust filter drawer of the device for recycling waste heat generated by roasting alumina.

In the figure: 1. roasting furnace; 2. the furnace top is warmed; 3. a smoke conveying pipe; 4. a waste heat utilization box; 5. a waste heat absorption cavity; 6. a heat exchange mechanism; 7. a smoke dust filter drawer; 8. a flue gas purification box; 9. a smoke outlet; 10. purifying the washing liquid; 11. a circulating draining pump; 12. a smoke exhaust pipe; 13. a smoke discharge valve; 14. a circulating water delivery pump; 15. a water storage tank; 16. a water discharge faucet; 17. a water delivery port; 18. a water inlet; 19. a rotating electric machine; 20. a rotating machine shaft; 21. a spiral frame; 22. a pump vane; 23. a pump tube; 24. a pump rotating shaft; 25. a hot water drawing pipe; 26. a water liquid flow pipe orifice; 27. a stainless steel dust collecting net; 28. a drawer frame; 29. a drawer handle; 30. a frame plate.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

As shown in fig. 1-5, an alumina roasting waste heat recycling device comprises a roasting furnace 1, and further comprises a waste heat utilization box 4 and a water storage tank 15, wherein the waste heat utilization box 4 is installed at the upper end of the roasting furnace 1 through a smoke conveying pipe 3 in a communicating manner, the waste heat utilization box 4 specifically comprises a waste heat absorption cavity 5, a heat exchange mechanism 6, a smoke filtering drawer 7 and a smoke exhaust pipe 12, the waste heat absorption cavity 5 is formed inside the waste heat utilization box 4, the heat exchange mechanism 6 is installed inside the waste heat absorption cavity 5, the smoke filtering drawer 7 is installed at the upper end inside the waste heat utilization box 4 in a pulling and embedding manner, the smoke exhaust pipe 12 is installed at the side end of the waste heat absorption cavity 5 in a communicating manner, and a smoke exhaust valve 13 is installed on the smoke exhaust pipe 12.

A rotating machine shaft 20 is installed at the center inside the water storage tank 15, a spiral rack 21 is installed on the rotating machine shaft 20, the upper end of the rotating machine shaft 20 is connected with a rotating motor 19 outside the top end of the water storage tank 15, and a water delivery port 17 and a water inlet port 18 are respectively formed in the upper end and the lower end of the left side wall of the water storage tank 15; the water storage tank 15 is used for mixing cold water and hot water in a meeting way and preserving heat for temporary storage.

The top end of the roasting furnace 1 is welded with a temperature return furnace top 2, the upper end of the temperature return furnace top 2 is communicated with a smoke conveying pipe 3, a smoke exhaust pipe 12 communicated with the waste heat utilization box 4 is embedded into a smoke purification box 8, a certain amount of purification washing liquid 10 is injected into the smoke purification box 8, the purification washing liquid 10 is not controlled by the smoke exhaust pipe 12, and the right side of the smoke purification box 8 is provided with a smoke exhaust port 9; the back-temperature furnace top 2 adopts an inverted cone design, so that the residual heat of the flue gas can be accumulated and the temperature can be returned in the roasting furnace 1, and the energy utilization rate is improved.

The heat exchange mechanism 6 is provided with a plurality of connected heat absorption and extraction water pipes 25, the upper and lower ends of the right side of the heat exchange mechanism 6 are respectively provided with a water liquid flow pipe opening 26, the water liquid flow pipe openings 26 are respectively communicated with the circulating water discharge pump 11 and the circulating water delivery pump 14, and the circulating water discharge pump 11 and the circulating water delivery pump 14 are both communicated with the water storage tank 15; the heat exchange mechanism 6 is used for drawing the waste heat in the flue gas to heat the water liquid inside, and reduces energy consumption.

A pump rotating shaft 24 is installed at the center inside the circulating water discharge pump 11, a pump rotating vane 22 is installed on the pump rotating shaft 24, both ends of the circulating water discharge pump 11 are communicated with pump pipes 23, and the circulating water conveying pump 14 and the circulating water discharge pump 11 have the same structure; the circulating water pump 11 and the circulating water pump 14 are used for circulating and conveying the water inside the water storage tank 15 for heating.

A drawer frame 28 is installed on the smoke dust filtering drawer 7, a stainless steel dust collecting net 27 is installed inside the drawer frame 28, a frame plate 30 is installed at the right end of the drawer frame 28, and a drawer handle 29 is installed on the frame plate 30; the smoke dust filtering drawer 7 is used for filtering and accumulating smoke dust contained in smoke gas, is convenient for centralized cleaning, and improves the cleaning efficiency.

It should be noted that, the utility model is an alumina roasting waste heat recycling device, when in use, by providing a temperature return furnace top 2, a waste heat utilization tank 4 and a water storage tank 15, when a roasting furnace 1 is roasting alumina raw materials, flue gas is generated and rises, the temperature return furnace top 2 is installed at the upper end of the roasting furnace 1, the temperature return furnace top 2 adopts an inverted cone design, a part of flue gas waste heat can be accumulated and heated in the roasting furnace 1, the energy utilization rate is improved, the flue gas can be input into the waste heat utilization tank 4 through a smoke transmission pipe 3, a heat exchange mechanism 6 is installed in a waste heat absorption cavity 5 of the waste heat utilization tank 4, the heat exchange mechanism 6 is communicated with the water storage tank 15 through a circulating drainage pump 11 and a circulating water transmission pump 14, the circulating drainage pump 11 and the circulating water transmission pump 14 are powered on to work, water in the water storage tank 15 is circularly conveyed and flowed, the flue gas waste heat in the waste heat utilization box 4 is absorbed by the hot water absorption pipe 25 after entering the hot water absorption pipe 25 of the heat exchange mechanism 6, and the water in the water storage tank 15 can be subjected to cold and hot interaction, rapid heating and flue gas waste heat absorption due to the circulating conveying flow of the circulating water discharge pump 11 and the circulating water conveying pump 14, so that the utilization rate of the flue gas waste heat in the furnace is high, the flue gas waste heat can be fully recycled, and the energy utilization rate is improved; through being equipped with smoke and dust filter steamer tray 7 and gas cleaning box 8, carry the waste heat utilization case 4 through defeated tobacco pipe 3 when the flue gas in the burning furnace 1 of burning, at first through smoke and dust filter steamer tray 7 filter the large granule smoke and dust material that contains in the flue gas, then unscrew and open smoke valve 13, the flue gas after the filtration in the waste heat utilization case 4 will be carried to gas cleaning box 8 through discharging fume pipe 12, inject a certain amount of purification washing liquid 10 in gas cleaning box 8, the mouth of pipe of discharging fume pipe 12 does not go into in the purification washing liquid 10, the flue gas can wash through purification washing liquid 10 earlier, get rid of the poisonous gas and the material that contain, so, can purify and filter the flue gas that the burning of burning furnace 1 produced, the environmental protection efficiency is high.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an alumina roasting waste heat recovery utilizes device, includes roaster (1), its characterized in that still includes waste heat utilization case (4) and water storage tank (15), roaster (1) upper end is installed waste heat utilization case (4) through defeated tobacco pipe (3) intercommunication, waste heat utilization case (4) specifically comprises waste heat absorption chamber (5), heat transfer mechanism ware (6), smoke and dust filter steamer tray (7) and exhaust pipe (12), waste heat utilization case (4) inside has seted up waste heat absorption chamber (5), waste heat absorption chamber (5) internally mounted has heat transfer mechanism ware (6), waste heat utilization case (4) inside upper end pull is inlayed and is installed smoke and dust filter steamer tray (7), waste heat absorption chamber (5) side intercommunication is installed and is discharged smoke pipe (12), it puts smoke valve (13) to install on exhaust pipe (12).

2. The alumina roasting waste heat recycling device according to claim 1, characterized in that: a rotating machine shaft (20) is installed at the center of the interior of the water storage tank (15), a spiral rack (21) is installed on the rotating machine shaft (20), the upper end of the rotating machine shaft (20) is connected with a rotating motor (19) outside the top end of the water storage tank (15), and a water conveying port (17) and a water inlet (18) are formed in the upper end and the lower end of the left side wall of the water storage tank (15) respectively.

3. The alumina roasting waste heat recycling device of claim 1, characterized in that: the flue gas purification device is characterized in that a tempering furnace top (2) is welded at the top end of the roasting furnace (1), a flue gas conveying pipe (3) is communicated with the upper end of the tempering furnace top (2), a flue gas discharging pipe (12) communicated with the waste heat utilization box (4) is embedded into a flue gas purification box (8), a certain amount of purification washing liquid (10) is injected into the flue gas purification box (8), the purification washing liquid (10) does not pass through the control of the flue gas discharging pipe (12), and a flue gas discharging port (9) is formed in the right side of the flue gas purification box (8).

4. The alumina roasting waste heat recycling device according to claim 1, characterized in that: the heat exchange mechanism (6) is provided with a plurality of communicated heat absorption and heat pipes (25), the upper end and the lower end of the right side of the heat exchange mechanism (6) are respectively provided with a water liquid circulating pipe orifice (26), the water liquid circulating pipe orifices (26) are respectively communicated with a circulating drainage pump (11) and a circulating water conveying pump (14), and the circulating drainage pump (11) and the circulating water conveying pump (14) are respectively communicated with a water storage tank (15).

5. The alumina roasting waste heat recycling device according to claim 4, characterized in that: the internal center of the circulating drainage pump (11) is provided with a pump rotary shaft (24), the pump rotary shaft (24) is provided with a pump rotary vane (22), two ends of the circulating drainage pump (11) are communicated with pump pipes (23), and the circulating water conveying pump (14) and the circulating drainage pump (11) are identical in structure.

6. The alumina roasting waste heat recycling device according to claim 1, characterized in that: install steamer tray frame (28) on smoke and dust filter steamer tray (7), steamer tray frame (28) internally mounted has stainless steel collection dirt net (27), frame board (30) are installed to steamer tray frame (28) right-hand member, install steamer tray hand (29) on frame board (30).