Waste heat recovery device

Abstract

A waste heat recovery device is used to solve the technical problem that the waste heat recovery device of the prior art mentioned in the background technology does not treat flue gas and water, impurities in the untreated flue gas are easily adhered to the inner wall of the steam pipe, and untreated water is easy to produce scale during the heat exchange process. After long-term use, a large amount of impurities adhere to the inner and outer walls of the steam pipe, which prolongs the heat exchange time between the flue gas and water and reduces the working efficiency. The device comprises a waste heat recovery box, one side of the waste heat recovery box is connected to a first filter component for filtering flue gas, the other side of the waste heat recovery box is connected to a second filter component for filtering liquid, a motor is fixedly provided on the top of the waste heat recovery box, a stirring rod for stirring liquid is provided in the waste heat recovery box, and the stirring rod is fixedly connected to the output end of the motor, a heat conduction pipe is provided in the waste heat recovery box, and the heat conduction pipe is wound around the outside of the stirring rod, one end of the heat conduction pipe passes through the waste heat recovery box and extends to the outside, and the heat conduction pipe is conductively connected to the first filter component.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery device. Background Art

[0002] Waste heat recovery usually refers to the technology of reusing the high-temperature exhaust gas generated during industrial processing. It is generally used in the textile printing and dyeing, chemical, petrochemical and other industries to recover the waste heat from the waste hot steam generated, thereby improving the utilization rate of resources.

[0003] The waste heat recovery device of the prior art, such as the utility model patent document with the authorization announcement number of "CN212747412U" and the patent name of "A Waste Heat Recovery and Utilization Device for Industrial Steam Thermal Energy", discloses a waste heat recovery device, including a base, a column is fixedly provided on the upper surface of the base, a support plate is fixedly provided on the upper end of the column, waste heat recovery boxes are fixedly provided on the left and right sides of the upper surface of the support plate, steam pipes are fixedly provided inside the two waste heat recovery boxes, the lower ends of the two steam pipes are both extended to the bottom of the corresponding waste heat recovery box and are jointly fixed with a three-way pipe, and a first valve is provided on the pipe wall of the steam pipe, the upper ends of the two steam pipes are both extended to the outside of the corresponding waste heat recovery box, the tops of the two waste heat recovery boxes are connected with a water inlet pipe, the bottoms of the side walls of the two waste heat recovery boxes are connected with a drain pipe, and the pipe wall of the drain pipe is provided with a second valve.

[0004] The above patent does not treat flue gas and water. Impurities in untreated flue gas are easy to adhere to the inner wall of the steam pipe. Untreated water is easy to produce scale during the heat exchange process and the scale is easy to adhere to the outer wall of the steam pipe. After long-term use, a large amount of impurities are adhered to the inner and outer walls of the steam pipe, which prolongs the heat exchange time between flue gas and water and reduces work efficiency. Utility Model Content

[0005] The utility model aims to solve the technical problems that the waste heat recovery device of the prior art mentioned in the background technology does not treat flue gas and water, impurities in the untreated flue gas are easily adhered to the inner wall of the steam pipe, and the untreated water is easy to produce scale during the heat exchange process and the scale is easy to adhere to the outer wall of the steam pipe. After long-term use, a large amount of impurities are adhered to the inner and outer walls of the steam pipe, which leads to a prolonged heat exchange time between the flue gas and water and reduces the working efficiency.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A waste heat recovery device comprises a waste heat recovery box, one side of the waste heat recovery box is conductively provided with a first filter component for filtering smoke, the other side of the waste heat recovery box is conductively provided with a second filter component for filtering liquid, a motor is fixedly provided on the top of the waste heat recovery box, a stirring rod for stirring liquid is provided in the waste heat recovery box, and the stirring rod is fixedly connected to the output end of the motor, a heat conduction pipe is provided in the waste heat recovery box, and the heat conduction pipe is wound around the outside of the stirring rod, one end of the heat conduction pipe passes through the waste heat recovery box and extends to the outside, and the heat conduction pipe is conductively connected to the first filter component, and a drain pipe is conductively provided at the bottom of the waste heat recovery box.

[0008] Working principle:

[0009] First, the operator introduces the water that needs to be heat exchanged into the second filter component. The second filter component will filter the water to reduce impurities in the water. The filtered water can be introduced into the waste heat recovery box. Then the operator will guide the flue gas into the first filter component. The first filter component will filter the flue gas. The filtered flue gas will be guided into the heat transfer pipe through the first filter component. Then the operator starts the motor, and the motor drives the stirring rod to rotate. The stirring rod accelerates the flow of water in the waste heat recovery box. The flue gas produces a heat exchange reaction with the water in the heat transfer pipe. Finally, the flue gas that has completed the heat exchange is discharged to the outside through the heat transfer pipe. The operator can discharge the water that has completed the heat exchange to the outside space through the drain pipe.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] First, a first filter assembly is provided, which will reduce dust and impurities in the flue gas, and then the filtered flue gas is introduced into the heat conduction pipe to prevent impurities in the flue gas from adhering to the inner wall of the heat conduction pipe.

[0012] Secondly, a second filter assembly is provided, which can filter the introduced water to reduce impurities in the water, and then the filtered water is introduced into the waste heat recovery box to reduce the impurities in the water from adhering to the outer wall of the heat pipe during the heat exchange process.

[0013] Third, a stirring rod is provided, which can speed up the fluidity of water in the waste heat recovery box, speed up the heat exchange between the water flow and the heat pipe, and shorten the heat exchange time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure at the center is enlarged;

[0016] Figure 3Schematic diagram of the assembly structure of the partition and the support rod.

[0017] Explanation of the reference numerals: waste heat recovery box 1, motor 2, stirring rod 3, heat conduction pipe 4, drain pipe 5, first filter box 6, first filter screen 7, mounting plate 8, sealing gasket 9, slide 10, second filter box 11, partition 12, support rod 13, second filter screen 14, sealing ring 15, threaded hole 16, water inlet hole 17, smoke inlet pipe 18, smoke outlet pipe 19, fan 20, first valve 21, water inlet pipe 22, first water pump 23, water outlet pipe 24, second water pump 25, second valve 26, reflux pipe 27, smoke exhaust pipe 28. DETAILED DESCRIPTION

[0018] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Example:

[0020] like Figure 1 and Figure 2 As shown, a waste heat recovery device includes a waste heat recovery box 1, and one side of the waste heat recovery box 1 is connected to a first filter assembly for filtering smoke, the first filter assembly includes a first filter box 6, a first filter screen 7, a mounting plate 8 and a sealing gasket 9, the first filter box 6 is located on one side of the waste heat recovery box 1, a slide groove 10 is opened in the first filter box 6, the first filter screen 7 is slidably arranged in the slide groove 10, the first filter screen 7 is fixed in the frame, and the movement of the slide groove 10 and the frame facilitates the operator to replace the first filter screen 7, the mounting plate 8 is fixed to the end of the first filter screen 7 and the mounting plate 8 is clamped with the first filter box 6, the mounting plate 8 can be fixed by clamping the mounting plate 8 with the first filter box 6, and the sealing gasket 9 is fixed On the mounting plate 8 and the sealing gasket 9 is located between the mounting plate 8 and the first filter box 6, the gap between the mounting plate 8 and the first filter box 6 can be sealed by the sealing gasket 9 to prevent smoke leakage, a smoke inlet pipe 18 is provided on one side of the bottom of the first filter box 6, a smoke outlet pipe 19 is provided on the top of the first filter box 6, and the smoke outlet pipe 19 is connected to the heat conduction pipe 4, the external smoke can be introduced into the first filter box 6 through the smoke inlet pipe 18 for filtration and flow into the heat conduction pipe 4 through the smoke outlet pipe 19, a fan 20 is provided on the smoke outlet pipe 19 and a first valve 21 is provided on the smoke outlet pipe 19, the fan 20 can accelerate the smoke so that the smoke outlet pipe 19 flows into the heat conduction pipe 4, and the first valve 21 can control the smoke output of the smoke outlet pipe 19.

[0021] like Figure 1 and Figure 3As shown, the other side of the waste heat recovery box 1 is connected to a second filter assembly for filtering liquid, and the second filter assembly includes a second filter box 11, a partition 12, a hollow support rod 13, a second filter screen 14 and a sealing ring 15. The second filter box 11 is located on one side of the waste heat recovery box 1, and the partition 12 is fixed in the second filter box 11 and a threaded hole 16 is provided on the partition 12. The end of the support rod 13 is threadedly connected to the threaded hole 16 and a plurality of water inlet holes 17 are provided on the support rod 13. The second filter screen 14 is coated on the support rod 13. The water in the second filter box 11 flows to the water inlet holes 17 on the support rod 13 through the second filter screen 14. The filtered water can flow to the bottom of the partition 12 through the hollow support rod 13. The outer wall of one end of the support rod 13 has a threaded section that can be threaded with the threaded hole 16 on the partition 12 The sealing ring 15 is provided between the second filter screen 14 and the partition 12, and the gap between the support rod 13 and the partition 12 can be sealed by the sealing ring 15 to prevent unfiltered water from flowing into the bottom of the partition 12 through the gap. A water inlet pipe 22 is provided on one side of the top of the second filter box 11, and a first water pump 23 is provided on the water inlet pipe 22. The external water source can be introduced into the second filter box 11 through the water inlet pipe 22 through the first water pump 23. A water outlet pipe 24 is provided on one side of the bottom of the second filter box 11, and the water outlet pipe 24 is located below the partition 12. The water outlet pipe 24 is connected to the inside of the waste heat recovery box 1 and a second water pump 25 is provided on the water outlet pipe 24. The water in the second filter box 11 can be guided to the waste heat recovery box 1 through the water outlet pipe 24 through the second water pump 25.

[0022] like Figure 1 As shown, a motor 2 is fixedly arranged on the top of the waste heat recovery box 1, and a stirring rod 3 for stirring the liquid is arranged in the waste heat recovery box 1, and the stirring rod 3 is fixedly connected to the output end of the motor 2. The stirring rod 3 can be driven to rotate by the motor 2. The rotation of the stirring rod 3 can accelerate the fluidity of the water flow in the waste heat recovery box 1, and accelerate the heat exchange between the water and the heat conducting pipe 4. A heat conducting pipe 4 is arranged in the waste heat recovery box 1, and the heat conducting pipe 4 is wound around the outside of the stirring rod 3. The heat conducting pipe 4 is arranged around the outside of the stirring rod 3 in a ring shape, so as to increase the contact surface between the heat conducting pipe 4 and the water in the waste heat recovery box 1, and accelerate the heat exchange between the water and the flue gas inside the heat conducting pipe 4. One end of the heat conducting pipe 4 extends to the outside through the waste heat recovery box 1, and the heat conducting pipe 4 is conductively connected to the first filter assembly. A drain pipe 5 is conductively arranged at the bottom of the waste heat recovery box 1, and the water after the heat exchange can be discharged to the outside through the drain pipe 5.

[0023] like Figure 1As shown, a smoke exhaust pipe 28 is provided on the heat conduction pipe 4 and a second valve 26 is provided on the smoke exhaust pipe 28. A return pipe 27 is provided on the smoke exhaust pipe 28 and the return pipe 27 is connected to the smoke outlet pipe 19. The return pipe 27 is located between the fan 20 and the first valve 21. A temperature sensor is provided in the smoke exhaust pipe 28. When the smoke temperature in the smoke exhaust pipe 28 is high, the smoke is redirected to the smoke outlet pipe 19 through the return pipe 27.

[0024] Working principle:

[0025] First, the operator introduces the water that needs to be heat exchanged into the second filter box 11 through the first water pump 23 on the water inlet pipe 22. The water in the second filter box 11 moves to the water inlet hole 17 on the support rod 13 through the second filter screen 14, so that the filtered water flows in the hollow support rod 13 to the bottom of the partition 12. Then the operator starts the second water pump 25, and the second water pump 25 introduces the filtered water in the second filter box 11 into the waste heat recovery box 1 through the water outlet pipe 24.

[0026] Then the operator guides the flue gas into the first filter box 6 through the smoke inlet pipe 18, and the flue gas with heat flows from the bottom of the first filter box 6 to the top of the first filter box 6. During the flow of the flue gas, the first filter screen 7 will adsorb impurities in the flue gas, thereby completing the filtering operation of the flue gas. Then the operator starts the fan 20, and the fan 20 guides the flue gas in the smoke outlet pipe 19 into the heat transfer pipe 4. Then the operator starts the motor 2, and the motor 2 drives the stirring rod 3 to rotate. The stirring rod 3 accelerates the flow of water in the waste heat recovery box 1, and the flue gas produces a heat exchange reaction with the water in the heat transfer pipe 4. Finally, the flue gas after the heat exchange is completed is discharged to the outside through the smoke exhaust pipe 28, and the operator can discharge the water after the heat exchange to the outside space through the drain pipe 5.

[0027] When the smoke temperature at the smoke exhaust pipe 28 is still high, the operator closes the second valve 26 and the first valve 21, and the smoke flows back to the smoke outlet pipe 19 through the reflux pipe 27, and the smoke is heat exchanged again.

[0028] When the operator needs to replace the first filter screen 7 , the operator pulls the mounting plate 8 , the mounting plate 8 is disengaged from the first filter box 6 , the first filter screen 7 slides out of the slide groove 10 , and then the operator can replace the first filter screen 7 .

[0029] When the operator needs to replace the second filter screen 14 , the operator rotates the support rod 13 , and the support rod 13 is disengaged from the threaded connection with the threaded hole 16 on the partition 12 . The operator can remove the support rod 13 from the second filter box 11 to replace the second filter screen 14 on the support rod 13 .

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A waste heat recovery device, characterized in that: The invention comprises a waste heat recovery box (1), wherein one side of the waste heat recovery box (1) is provided with a first filter assembly for filtering smoke, and the other side of the waste heat recovery box (1) is provided with a second filter assembly for filtering liquid. A motor (2) is fixedly arranged on the top of the waste heat recovery box (1), a stirring rod (3) for stirring liquid is arranged inside the waste heat recovery box (1), and the stirring rod (3) is fixedly connected to the output end of the motor (2), a heat conduction pipe (4) is arranged inside the waste heat recovery box (1), and the heat conduction pipe (4) is wound around the outside of the stirring rod (3), one end of the heat conduction pipe (4) passes through the waste heat recovery box (1) and extends to the outside, and the heat conduction pipe (4) is conductively connected to the first filter assembly, and a drainage pipe (5) is conductively arranged on the bottom of the waste heat recovery box (1).

2. A waste heat recovery device according to claim 1, characterized in that: The first filter assembly comprises a first filter box (6), a first filter screen (7), a mounting plate (8) and a sealing gasket (9); the first filter box (6) is located at one side of the waste heat recovery box (1); a slide groove (10) is provided in the first filter box (6); the first filter screen (7) is slidably arranged in the slide groove (10); the mounting plate (8) is fixed to the end of the first filter screen (7) and the mounting plate (8) is snap-connected with the first filter box (6); the sealing gasket (9) is fixed on the mounting plate (8) and is located between the mounting plate (8) and the first filter box (6).

3. A waste heat recovery device according to claim 1, characterized in that: The second filter assembly comprises a second filter box (11), a partition (12), a hollow support rod (13), a second filter screen (14) and a sealing ring (15); the second filter box (11) is located on one side of the waste heat recovery box (1); the partition (12) is fixed in the second filter box (11) and a threaded hole (16) is provided on the partition (12); the end of the support rod (13) is threadedly connected to the threaded hole (16) and a plurality of water inlet holes (17) are provided on the support rod (13); the second filter screen (14) is covered on the support rod (13); and the sealing ring (15) is provided between the second filter screen (14) and the partition (12).

4. A waste heat recovery device according to claim 2, characterized in that: A smoke inlet pipe (18) is provided on one side of the bottom of the first filter box (6), a smoke outlet pipe (19) is provided on the top of the first filter box (6), and the smoke outlet pipe (19) is connected to the heat conduction pipe (4), a fan (20) is provided on the smoke outlet pipe (19), and a first valve (21) is provided on the smoke outlet pipe (19).

5. A waste heat recovery device according to claim 3, characterized in that: A water inlet pipe (22) is provided on one side of the top of the second filter box (11), and a first water pump (23) is provided on the water inlet pipe (22); a water outlet pipe (24) is provided on one side of the bottom of the second filter box (11), and the water outlet pipe (24) is located below the partition (12); the water outlet pipe (24) is connected to the inside of the waste heat recovery box (1), and a second water pump (25) is provided on the water outlet pipe (24).

6. A waste heat recovery device according to claim 4, characterized in that: The heat conduction pipe (4) is provided with a smoke exhaust pipe (28) and the smoke exhaust pipe (28) is provided with a second valve (26); the smoke exhaust pipe (28) is provided with a return pipe (27) and the return pipe (27) is connected to the smoke outlet pipe (19); the return pipe (27) is located between the fan (20) and the first valve (21).

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