Heat storage and supply system for industrial kiln waste heat recovery

Abstract

The utility model relates to the technical field of industrial kiln waste heat recovery, in particular to a heat storage and supply system for industrial kiln waste heat recovery, which comprises an industrial kiln body. The water outlet pipeline and the water inlet pipeline are respectively communicated with the water outlet end and the water inlet end of the waste heat recoverer; the underground buried pipe heat exchange assembly is communicated with the water outlet pipeline and the water inlet pipeline; the soil source heat pump is communicated with the water outlet pipeline; the circulating pipeline is communicated with the soil source heat pump; the building heating system is communicated with the circulating pipeline; the water supplementing system is communicated with the soil source heat pump and the water outlet pipeline; the system can collect and store waste heat emitted by the industrial kiln body, when winter comes, the system can call the stored heat energy, the winter heating requirement of a building is met, and cyclic utilization and efficient configuration of energy are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial kiln waste heat recovery technical field, concretely is the heat storage heating system for industrial kiln waste heat recovery. BACKGROUND

[0002] Waste heat recovery is the problem that cannot be ignored in the rational use of energy, energy saving, energy utilization rate improvement etc. At present, in each department of industrial production, there are a large number of heating furnaces, kilns, industrial boilers etc., and the surface radiation temperature is between 200~500°C, and the radiation waste heat has not been fully utilized, causing serious waste of energy, therefore, developing effective waste heat recovery device is the effective way of energy rational utilization. At present, industrial kiln produces a large amount of heat dissipation to the outside world, causing serious waste of energy, which indirectly leads to the difficulty of building a circulation system through integration of industrial waste heat for building heating in winter, and energy allocation is difficult to realize high efficiency, further affecting the sustainable development of economy and environment. SUMMARY

[0003] The utility model aims at providing the heat storage heating system for industrial kiln waste heat recovery, to solve the problem of energy consumption waste and heating cycle building difficulty of industrial kiln during production, resulting in low efficiency of energy allocation and affecting the sustainable development of economy and environment.

[0004] To realize the above-mentioned purpose, the utility model provides the following technical scheme: the heat storage heating system for industrial kiln waste heat recovery, including industrial kiln body, still including waste heat recovery device that covers in the outside of industrial kiln body, water outlet pipeline and water inlet pipeline that communicate with the water outlet end and water inlet end of waste heat recovery device respectively, underground buried pipe heat exchange component that communicates with water outlet pipeline and water inlet pipeline, soil source heat pump that communicates with water outlet pipeline, circulating pipeline that communicates with soil source heat pump, building heating system that communicates with circulating pipeline, water supplement system that communicates with soil source heat pump and water outlet pipeline.

[0005] Further, the waste heat recovery device includes two symmetrical mobile cover bodies, a serpentine heat absorption coil pipe arranged on the outer wall of the mobile cover body, and a guide rail type electric sliding mechanism connected to the lower side of the mobile cover body. The two mobile cover bodies are horizontally moved along the two sides of the industrial kiln body through the two guide rail type electric sliding mechanisms, and can be driven to butt joint. The water inlet end and the water outlet end of the serpentine heat absorption coil pipe are communicated with one end of the water inlet pipeline and the water outlet pipeline respectively.

[0006] Further, the mobile cover body includes a cover shell, a bottom plate arranged on the lower side of the cover shell, and a plurality of reinforcing rib plates arranged between the upper side of the bottom plate and the outer side of the cover shell. The plurality of reinforcing rib plates are equally spaced along the length direction of the cover shell. The cross section of the two cover shells after butt joint forms an inverted U shape.

[0007] Further, the guide rail type electric sliding mechanism comprises an electric sliding rail, a sliding block in sliding cooperation with the electric sliding rail, guide rails located at two sides of the electric sliding rail respectively, and walking wheels in sliding cooperation with the guide rails, the sliding block and the two walking wheels are connected with the lower side of the bottom plate.

[0008] Further, the water inlet pipeline comprises a sixth conveying pipe, two second metal bellows in communication with one end of the sixth conveying pipe through a three-way joint, and a waste heat recovery circulating pump arranged on a pipe section of the sixth conveying pipe and close to one side of a water inlet port of the three-way joint.

[0009] Further, the water outlet pipeline comprises a fifth conveying pipe, two first metal bellows in communication with one end of the fifth conveying pipe through a three-way joint, and a soil source evaporator circulating pump arranged on a pipe section of the fifth conveying pipe and close to one side of a water inlet port of the soil source heat pump, one end of each of the two first metal bellows is in communication with a water outlet port of the two serpentine heat absorbing coils, and the other end of the fifth conveying pipe is in communication with a water inlet port of the soil source heat pump.

[0010] Further, the water supplementing system comprises a water softener, a fourth conveying pipe and a first conveying pipe in communication with the water softener respectively, a softened expansion water tank in communication with one end of the first conveying pipe, and a second conveying pipe and a third conveying pipe in communication with one side of the softened expansion water tank and arranged longitudinally and at intervals, a water inlet port of the second conveying pipe is in communication with a water outlet port of the soil source heat pump, and a water outlet port of the third conveying pipe is in communication with a pipe wall of the fifth conveying pipe.

[0011] Further, the underground buried pipe heat exchange assembly is composed of a plurality of soil source buried pipes arranged horizontally and at intervals, and two ends of each of the soil source buried pipes are in communication with a pipe wall of the sixth conveying pipe and the fifth conveying pipe respectively.

[0012] Further, the circulating pipeline comprises two seventh conveying pipes in communication with the soil source heat pump, and a heating circulating pump arranged on a pipe section of one of the seventh conveying pipes.

[0013] Compared with the prior art, the utility model has the advantages as follows:

[0014] 1. The utility model discloses a heat storage and heat supply system for industrial kiln waste heat recovery which comprises a waste heat recovery device, a water outlet pipeline, a water inlet pipeline, an underground buried pipe heat exchange assembly, a soil source heat pump, a circulating pipeline and a building heating system. The system can collect and store the waste heat emitted by the industrial kiln body. When winter comes, the system can call the stored heat energy to meet the winter heating demand of the building, realize the recycling and efficient allocation of energy, and actively promote the sustainable development of economy and environment.

[0015] 2. The utility model discloses when the maintenance work of industrial kiln body is needed, make two cover casings away from industrial kiln body, provide sufficient operating space for the maintenance personnel of industrial kiln body, facilitate the smooth development of various maintenance operations, improve maintenance efficiency BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the structure schematic drawing of the heat storage and supply system for industrial kiln waste heat recovery of the utility model;

[0017] Fig. 2 It is the structure schematic drawing of the waste heat recovery device of the utility model.

[0018] In the drawing: 1, industrial kiln body;2, waste heat recovery device;3, soil source ground -buried pipe;4, soil source heat pump;5, building heating system;6, softening expansion tank;7, water softener;8, first conveying pipe;9, second conveying pipe;10, third conveying pipe;11, fourth conveying pipe;12, fifth conveying pipe;13, soil source evaporator circulating pump;14, first metal bellows;15, sixth conveying pipe;16, waste heat recovery circulating pump;17, second metal bellows;18, seventh conveying pipe;19, heating circulating pump;20, cover casing;21, serpentine heat absorption coil;22, bottom plate;23, reinforcing rib plate;24, electric sliding rail;25, sliding block;26, guide rail;27, travelling wheel. DETAILED DESCRIPTION

[0019] Please refer to Figs. 1-2 , the heat storage and supply system for industrial kiln waste heat recovery, including industrial kiln body 1, still include the cover casing of waste heat recovery device 2 that sets up in industrial kiln body 1 outside, the water outlet line and water inlet line that respectively with the water outlet end and water inlet end of waste heat recovery device 2 communication, with water outlet line and water inlet line communication's underground buried pipe heat exchange subassembly, with water outlet line communication's soil source heat pump 4, with soil source heat pump 4 communication's circulating pipeline, with circulating pipeline communication's building heating system 5, with soil source heat pump 4 and water outlet line communication's water replenishing system.

[0020] The waste heat recovery device 2 comprises two symmetrical moving cover bodies, a serpentine heat absorption coil 21 arranged on the outer wall of the moving cover body, and a guide rail type electric sliding mechanism connected to the lower side of the moving cover body. The two moving cover bodies are respectively moved horizontally along the two sides of the industrial kiln body 1 through the two guide rail type electric sliding mechanisms, and the two moving cover bodies can be driven to be butted and spliced. The water inlet end and the water outlet end of the serpentine heat absorption coil 21 are respectively communicated with one end of the water inlet pipeline and the water outlet pipeline. The moving cover body comprises a cover shell 20 made of carbon steel, a bottom plate 22 connected to the lower side of the cover shell 20, and a plurality of reinforcing rib plates 23 connected between the upper side of the bottom plate 22 and the outer side of the cover shell 20. The plurality of reinforcing rib plates 23 are arranged at equal intervals along the length direction of the cover shell 20, and the cross section of the two cover shells 20 after butting and splicing forms an inverted U shape. The triangular structure formed between the reinforcing rib plate 23, the bottom plate 22 and the cover shell 20 improves the connection strength of the bottom plate 22 and the cover shell 20 and enhances the stability therebetween. The guide rail type electric sliding mechanism comprises an electric sliding rail 24 mounted on the workshop floor, a sliding block 25 in sliding cooperation with the electric sliding rail 24, guide rails 26 respectively located on both sides of the electric sliding rail 24 and mounted on the workshop floor, and traveling wheels 27 in sliding cooperation with the guide rails 26. The sliding block 25 and the two traveling wheels 27 are connected to the lower side of the bottom plate 22.

[0021] The water inlet pipeline comprises a sixth conveying pipe 15, two second metal corrugated pipes 17 communicated with one end of the sixth conveying pipe 15 through a tee joint, and a waste heat recovery circulating pump 16 arranged on the pipe section of the sixth conveying pipe 15 and close to one side of the water inlet port of the tee joint. One end of each of the two second metal corrugated pipes 17 is communicated with the water inlet port of each of the two serpentine heat absorption coils 21. The water outlet pipeline comprises a fifth conveying pipe 12, two first metal corrugated pipes 14 communicated with one end of the fifth conveying pipe 12 through a tee joint, and a soil source evaporator circulating pump 13 arranged on the pipe section of the fifth conveying pipe 12 and close to one side of the water inlet port of the soil source heat pump 4. One end of each of the two first metal corrugated pipes 14 is communicated with the water outlet port of each of the two serpentine heat absorption coils 21, and the other end of the fifth conveying pipe 12 is communicated with the water inlet port of the soil source heat pump 4. The first metal corrugated pipe 14 and the second metal corrugated pipe 17 solve the pipeline interference problem that may occur during the moving away or splicing of the two cover shells 20, ensure smooth movement of the cover shells 20, and avoid the inconvenience caused by pipeline obstruction.

[0022] The water supplement system comprises a water softener 7, a fourth conveying pipe 11 and a first conveying pipe 8 in communication with the water softener 7 respectively, a softened water expansion tank 6 in communication with one end of the first conveying pipe 8, a second conveying pipe 9 and a third conveying pipe 10 in communication with one side of the softened water expansion tank 6 and arranged longitudinally at intervals, a water inlet port of the second conveying pipe 9 in communication with a water outlet port of the soil source heat pump 4, and a water outlet port of the third conveying pipe 10 in communication with a pipe wall of a fifth conveying pipe 12; the softened water treated by the water softener 7 enters the softened water expansion tank 6 through the first conveying pipe 8, and is dynamically supplemented to the fifth conveying pipe 12 through the third conveying pipe 10, so as to maintain the system pressure at 0.2-0.3 MPa.

[0023] The underground buried pipe heat exchange assembly is composed of a plurality of soil source ground buried pipes 3 arranged horizontally at intervals, and the two ends of the soil source ground buried pipe 3 are in communication with a pipe wall of the sixth conveying pipe 15 and the fifth conveying pipe 12 respectively.

[0024] The circulating pipeline comprises two seventh conveying pipes 18 in communication with the soil source heat pump 4, and a heating circulating pump 19 installed on a pipe section of one seventh conveying pipe 18.

[0025] Valves for regulating the flow and flow direction of the fluid in the pipes are installed on the plurality of soil source ground buried pipes 3, the two first metal corrugated pipes 14, the two second metal corrugated pipes 17, the fifth conveying pipe 12, the third conveying pipe 10, the second conveying pipe 9, and the other seventh conveying pipe 18.

[0026] Working process and principle: In the production and operation stage of the industrial kiln body 1, the control cabinet configured in the workshop is started to drive the continuous circulation of the heat medium water, and the two serpentine heat absorption coils 21 on the two shells 20 absorb the waste heat emitted by the outer wall of the industrial kiln body 1 through heat conduction and radiation, and the heat medium water is heated to 85-90℃ in the serpentine heat absorption coil 21. Subsequently, the high-temperature heat medium water is collected into the fifth delivery pipe 12 through the two first metal corrugated pipes 14, and then flows into the soil source pipe 3 of the underground buried pipe heat exchange assembly. In the soil source pipe 3, the heat medium water exchanges heat with the soil, rock stratum and underground water, stores heat in the underground, and raises the ground temperature gradient to above 25℃. The backwater that completes heat exchange is again distributed to the two serpentine heat absorption coils 21 through the sixth delivery pipe 15 and the two second metal corrugated pipes 17 under the boosting action of the waste heat recovery circulating pump 16, forming a closed loop heat absorption-heat storage cycle. In winter, after the industrial kiln body 1 stops production, the control cabinet will start the soil source heat pump 4, the evaporation side circulating pump 13 and the heating circulating pump 19. At this time, the heat energy stored in the underground is exchanged through the buried pipe 3, so that the water temperature flowing through the fifth delivery pipe 12 rises to above 10℃, and then the hot water enters the evaporator side of the soil source heat pump 4. The soil source heat pump 4 converts low-grade heat energy into high-grade heat energy by relying on the work of the compressor, and the water temperature at the output end of the condenser can reach 55-60℃, and the coefficient of performance (COP) is not less than 3.5. These high-temperature hot water is transported to the building heating system 5 through the seventh delivery pipe 18 to meet the heating demand of the building in winter. Thus, the system can collect and store the waste heat emitted by the industrial kiln body 2, and when winter comes, the system can call the stored heat energy to meet the heating demand of the building in winter, achieving the recycling and efficient allocation of energy, and playing a positive role in promoting the sustainable development of economy and environment.

[0027] In the system water replenishment link, the fourth delivery pipe 11 is connected to the water pipe, and the tap water first enters the water softener 7 and is treated by ion exchange resin to reduce the water hardness to the specified standard. The softened water flows into the softening expansion tank 6 through the first delivery pipe 8, and is continuously supplemented to the fifth delivery pipe 12 through the third delivery pipe 10. At the same time, part of the backwater flows back to the softening expansion tank 6 after passing through the soil source heat pump 4 through the second delivery pipe 9. The softening expansion tank 6 is provided with a 200-mesh stainless steel filter screen for impurity filtration of the heat medium water, so as to realize continuous softening and purification of the heat medium water.

[0028] When the industrial kiln body 1 needs to be maintained, the operator starts the two electric sliding rails 24 through the control cabinet. After the electric sliding rails 24 are operated, the two sliding blocks 25 drive the two bottom plates 22 to move away from each other, and then the two cover shells 20 are separated from each other. In this process, the walking wheels 27 slide along the guide rails 26 synchronously, drive the two cover shells 20 to move away from the industrial kiln body 1, and provide sufficient space for the maintenance work of the industrial kiln body 1. The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A heat storage and heating system for waste heat recovery from industrial kilns, comprising an industrial kiln body (1), characterized in that, It also includes a waste heat recovery unit (2) installed outside the industrial kiln body (1), an outlet water pipe and an inlet water pipe connected to the outlet water end and the inlet water end of the waste heat recovery unit (2) respectively, an underground buried pipe heat exchange component connected to the outlet water pipe and the inlet water pipe, a soil source heat pump (4) connected to the outlet water pipe, a circulation pipe connected to the soil source heat pump (4), a building heating system (5) connected to the circulation pipe, and a water replenishment system connected to the soil source heat pump (4) and the outlet water pipe.

2. The thermal storage and heating system as described in claim 1, characterized in that, The waste heat recovery unit (2) includes two symmetrically arranged movable covers, a serpentine heat absorption coil (21) on the outer wall of the movable covers, and a guide rail electric sliding mechanism connected to the lower side of the movable covers. The two movable covers move horizontally along both sides of the industrial kiln body (1) through the two guide rail electric sliding mechanisms, and can drive the two movable covers to dock and assemble. The water inlet end and the water outlet end of the serpentine heat absorption coil (21) are respectively connected to one end of the water inlet pipe and the water outlet pipe.

3. The thermal storage and heating system as described in claim 2, characterized in that, The movable cover includes a cover (20), a base plate (22) located on the lower side of the cover (20), and a plurality of reinforcing ribs (23) located on the upper side of the base plate (22) and the outer side of the cover (20). The plurality of reinforcing ribs (23) are arranged at equal intervals along the length direction of the cover (20), and the cross section of the two covers (20) is formed by joining them together to form an inverted U shape.

4. The thermal storage and heating system as described in claim 3, characterized in that, The guide rail type electric sliding mechanism includes an electric slide rail (24), a slider (25) that slides with the electric slide rail (24), guide rails (26) located on both sides of the electric slide rail (24), and a traveling wheel (27) that slides with the guide rail (26). The slider (25) and the two traveling wheels (27) are all connected to the lower side of the base plate (22).

5. The thermal storage and heating system as described in claim 2, characterized in that, The water inlet pipeline includes a sixth delivery pipe (15), two second metal corrugated pipes (17) connected to one end of the sixth delivery pipe (15) via a tee, and a waste heat recovery circulation pump (16) installed on the pipe section of the sixth delivery pipe (15) and close to the water inlet port of the tee. One end of each of the two second metal corrugated pipes (17) is connected to the water inlet port of two serpentine heat absorption coils (21).

6. The thermal storage and heating system as described in claim 5, characterized in that, The water outlet pipeline includes a fifth delivery pipe (12), two first metal corrugated pipes (14) connected to one end of the fifth delivery pipe (12) via a tee, and a soil source evaporator circulation pump (13) installed on the pipe section of the fifth delivery pipe (12) and close to the water inlet port of the soil source heat pump (4). One end of the two first metal corrugated pipes (14) is connected to the water outlet port of two serpentine heat absorption coils (21) respectively, and the other end of the fifth delivery pipe (12) is connected to the water inlet port of the soil source heat pump (4).

7. The thermal storage and heating system as described in claim 6, characterized in that, The water replenishment system includes a water softener (7), a fourth delivery pipe (11) and a first delivery pipe (8) respectively connected to the water softener (7), a softening expansion tank (6) connected to one end of the first delivery pipe (8), a second delivery pipe (9) and a third delivery pipe (10) connected to one side of the softening expansion tank (6) and arranged longitudinally at intervals. The inlet port of the second delivery pipe (9) is connected to the outlet port of the soil source heat pump (4), and the outlet port of the third delivery pipe (10) is connected to the pipe wall of the fifth delivery pipe (12).

8. The thermal storage and heating system as described in claim 6, characterized in that, The underground buried pipe heat exchange assembly is composed of multiple horizontally spaced soil source buried pipes (3), and the two ends of the soil source buried pipes (3) are respectively connected to the pipe walls of the sixth delivery pipe (15) and the fifth delivery pipe (12).

9. The thermal storage and heating system as described in claim 1, characterized in that, The circulation pipeline includes two seventh delivery pipes (18) connected to the soil source heat pump (4) and a heating circulation pump (19) installed on a section of one of the seventh delivery pipes (18).

Images