Waste heat utilization device of gas absorption heat pump

Abstract

The utility model provides a gas absorption heat pump waste heat utilization device in the technical field of gas waste heat utilization, which comprises an absorption heat pump, a gas outlet pipe of the absorption heat pump is connected with a negative pressure fan, a gas inlet pipe of the absorption heat pump is connected with a smoke outlet pipe of a heat exchanger, the heat exchanger comprises a first water outlet pipe, and the first water outlet pipe is connected with a first water storage tank. The first water storage tank is connected with the mixed water tank, the absorption heat pump comprises a second water outlet pipe, the second water outlet pipe is connected with a second water storage tank, and the second water storage tank is connected with the mixed water tank. The heat exchanger conducts primary recovery on boiler flue gas heat, the absorption heat pump conducts secondary recovery on the boiler flue gas heat, primary hot water generated by the heat exchanger enters the first water storage tank to be stored, and secondary hot water generated by the absorption heat pump enters the second water storage tank to be stored. And hot water in the first water storage tank and the second water storage tank is injected into the mixed water tank, so that the water temperature in the mixed water tank meets user requirements.

Description

Technical Field

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

[0002] A gas-fired absorption heat pump waste heat recovery device utilizes the heat energy generated by gas combustion to drive a heat pump cycle, thereby recovering and utilizing waste heat from flue gas. This device typically includes key components such as a flue gas waste heat recovery heat exchanger, an absorption heat pump unit, a condenser, an evaporator, a solution heat exchanger, and a solution pump. These components work together to effectively convert the high-temperature flue gas generated by gas combustion into usable heat energy for heating, hot water supply, or industrial production processes.

[0003] However, the hot water generated by the gas absorption heat pump is lower in temperature than that of the heat exchanger. For example, in the efficient trigeneration system mentioned in the patent with authorization announcement number CN 104421044 B, when the two devices are used simultaneously, the temperature difference will occur, which is not conducive to heating for users.

[0004] Therefore, in view of the above problems, a gas absorption heat pump waste heat utilization device is proposed to solve the above problems. Utility Model Content

[0005] Aiming at the deficiencies of the prior art, the utility model develops a gas absorption heat pump waste heat utilization device, which can reduce the temperature difference between the gas absorption heat pump and the heat exchanger.

[0006] The technical solution to the technical problem solved by the utility model is: a gas absorption heat pump waste heat utilization device, including an absorption heat pump, the outlet pipe of the absorption heat pump is connected to the negative pressure fan, the air inlet pipe of the absorption heat pump is connected to the smoke outlet pipe of the heat exchanger, the heat exchanger includes a first water outlet pipe, the first water outlet pipe is connected to the first water storage tank, the first water storage tank is connected to the mixing water tank, the absorption heat pump is provided with a second water outlet pipe, the second water outlet pipe is connected to the second water storage tank, and the second water storage tank is connected to the mixing water tank.

[0007] The heat exchanger recovers the heat of the boiler flue gas for the primary time, and the absorption heat pump recovers the heat of the boiler flue gas for the secondary time, making full use of the heat of the boiler flue gas. The primary hot water generated by the heat exchanger is stored in the first water tank, and the secondary hot water generated by the absorption heat pump is stored in the second water tank. According to the water temperature required by the user, the hot water in the first water tank and the second water tank is injected into the mixed water tank so that the water temperature in the mixed water tank meets the user's requirements, and then it is transported to prevent the water temperature difference caused by the separate transportation of hot water from the heat exchanger and the absorption heat pump.

[0008] Preferably, the mixing water tank includes a tank shell, a support frame, a first water injection pipe, a second water injection pipe, a first water injection valve, a second water injection valve, a water supply pipe and a water supply valve. The tank shell is mounted on the support frame. The first water injection pipe and the second water injection pipe are arranged on the upper part of the tank shell. The first water injection pipe is connected to the first water storage tank, and the second water injection pipe is connected to the second water storage tank. The first water injection pipe is provided with a first water injection valve, and the second water injection pipe is provided with a second water injection valve. A water supply pipe is arranged at the lower end of the tank shell, and the water supply pipe is provided with a water supply valve.

[0009] The mixing water tank is injected with hot water from the first water storage tank and the second water storage tank respectively through the first water injection pipe and the second water injection pipe, and the flow of the hot water flowing in is controlled by the first water injection valve and the second water injection valve.

[0010] Preferably, the mixing water tank also includes a motor, a reducer, a main shaft, bearings and spiral blades. The output end of the motor is connected to the reducer, the output end of the reducer is connected to the main shaft, the main shaft is vertically arranged in the box shell, the lower end of the main shaft is connected to the reducer, the upper end of the main shaft is connected to the bearing, the bearing is arranged on the box shell, and the spiral blades are arranged on the outer wall of the main shaft, and the spiral blades are located in the box shell.

[0011] The motor drives the reducer and the main shaft to rotate, and the main shaft drives the spiral blades to rotate. During the rotation of the spiral blades, the hot water of different temperatures in the mixing water tank is quickly mixed.

[0012] Preferably, the heat exchanger includes a heat exchange chamber, a smoke inlet pipe, a smoke inlet chamber and a coil. The smoke inlet chamber is arranged in the heat exchange chamber, the upper end of the smoke inlet chamber is connected to the smoke inlet pipe, and the lower end of the smoke inlet chamber is connected to the coil. The coil is arranged in the heat exchange chamber and is connected to the smoke outlet pipe.

[0013] The hot flue gas from the boiler first enters the flue gas inlet chamber, and is then diverted to the coil through the flue gas inlet chamber. The coil exchanges heat with the water in the heat exchange chamber to heat the water inside.

[0014] Preferably, the heat exchanger further includes a first water inlet pipe, a first water outlet valve and a first water outlet pump. The first water inlet pipe is arranged on the heat exchange chamber, the first water outlet pipe is arranged at the lower part of the heat exchange chamber, and the first water outlet pipe is provided with a first water outlet valve and a first water outlet pump.

[0015] Preferably, a first water supply pipe is provided on the first water storage tank, a first water supply valve is provided on the first water supply pipe, the first water supply pipe is connected to the first water outlet pipe of the heat exchanger, a first water supply pipe is provided at the lower part of the first water storage tank, the first water supply pipe is provided with a first water supply valve and a first water supply pump, the first water supply pipe is connected to the first water injection pipe, a second water supply pipe is provided on the second water storage tank, a second water supply pipe is provided with a second water supply valve, the second water supply pipe is connected to the second water outlet pipe of the absorption heat pump, a second water supply pipe is provided at the lower part of the second water storage tank, the second water supply pipe is provided with a second water supply valve and a second water supply pump, and the second water supply pipe is connected to the second water injection pipe.

[0016] The effects provided in the content of the utility model are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solution has the following advantages or beneficial effects:

[0017] The heat exchanger recovers the heat of the boiler flue gas for the primary time, and the absorption heat pump recovers the heat of the boiler flue gas for the secondary time, making full use of the heat of the boiler flue gas. The primary hot water generated by the heat exchanger is stored in the first water tank, and the secondary hot water generated by the absorption heat pump is stored in the second water tank. According to the water temperature required by the user, the hot water in the first water tank and the second water tank is injected into the mixed water tank so that the water temperature in the mixed water tank meets the user's requirements, and then it is transported to prevent the water temperature difference caused by the separate transportation of hot water from the heat exchanger and the absorption heat pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the mixing water tank of the utility model.

[0021] Figure 3 This is a cross-sectional schematic diagram of the mixing water tank of the present utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the heat exchanger of the utility model.

[0023] Figure 5 This is a cross-sectional schematic diagram of the heat exchanger of the present utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the absorption heat pump of the utility model.

[0025] Figure 7 This is a flow chart of the present invention (the hollow arrows represent the direction of the flue gas, and the solid arrows represent the direction of the waterway).

[0026] In the figure, 1, absorption heat pump; 2, exhaust pipe; 3, intake pipe; 4, smoke exhaust pipe; 5, heat exchanger; 6, first water outlet pipe; 7, first water storage tank; 8, mixing water tank; 9, second water outlet pipe; 10, second water storage tank; 11, box shell; 12, support frame; 13, first water injection pipe; 14, second water injection pipe; 15, first water injection valve; 16, second water injection valve; 17, water delivery pipe; 18, water delivery valve; 19, motor; 20, reducer; 21, main shaft; 2 2. Bearing; 23. Spiral blade; 24. Heat exchange chamber; 25. Smoke inlet pipe; 26. Smoke inlet chamber; 27. Coil; 28. First water inlet pipe; 29. First water outlet valve; 30. First water outlet pump; 31. First water supply pipe; 32. First water supply valve; 33. First water delivery pipe; 34. First water delivery valve; 35. First water delivery pump; 36. Second water supply pipe; 37. Second water supply valve; 38. Second water delivery pump; 39. Second water delivery pipe; 40. Second water delivery valve. DETAILED DESCRIPTION

[0027] To clearly illustrate the technical features of this solution, the present invention is described in detail below using specific embodiments and accompanying drawings. The following disclosure provides numerous different embodiments or examples for implementing various configurations of the present invention. To simplify the disclosure of the present invention, the following descriptions focus on components and configurations of specific examples. Furthermore, the present invention may repeat reference numerals and / or letters across different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or configurations discussed. It should be noted that the components illustrated in the accompanying drawings are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted to avoid unnecessarily limiting the present invention. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] like Figures 1 to 7 As shown, a gas absorption heat pump waste heat utilization device includes an absorption heat pump 1, the air outlet pipe 2 of the absorption heat pump 1 is connected to the negative pressure fan, the air inlet pipe 3 of the absorption heat pump 1 is connected to the smoke outlet pipe 4 of the heat exchanger 5, the heat exchanger 5 includes a first water outlet pipe 6, the first water outlet pipe 6 is connected to the first water storage tank 7, the first water storage tank 7 is connected to the mixing water tank 8, the absorption heat pump 1 is provided with a second water outlet pipe 9, the second water outlet pipe 9 is connected to the second water storage tank 10, and the second water storage tank 10 is connected to the mixing water tank 8. The heat exchanger 5 performs the primary recovery of the heat of the boiler flue gas, and the absorption heat pump 1 performs the secondary recovery of the heat of the boiler flue gas, making full use of the heat of the boiler flue gas. The primary hot water generated by the heat exchanger 5 enters the first water storage tank 7 for storage, and the secondary hot water generated by the absorption heat pump 1 enters the second water storage tank 10 for storage. According to the water temperature required by the user, the hot water in the first water storage tank 7 and the second water storage tank 10 is injected into the mixing water tank 8 so that the water temperature in the mixing water tank 8 meets the user's requirements, and then it is transported to prevent the water temperature difference caused by the separate transportation of hot water from the heat exchanger 5 and the absorption heat pump 1.

[0029] The mixing water tank 8 includes a housing 11, a support frame 12, a first water injection pipe 13, a second water injection pipe 14, a first water injection valve 15, a second water injection valve 16, a water delivery pipe 17, and a water delivery valve 18. The housing 11 is mounted on the support frame 12. The first and second water injection pipes 13, 14 are disposed at the top of the housing 11. The first water injection pipe 13 communicates with the first water storage tank 7, while the second water injection pipe 14 communicates with the second water storage tank 10. The first water injection pipe 13 is provided with a first water injection valve 15, while the second water injection pipe 14 is provided with a second water injection valve 16. A water delivery pipe 17 is disposed at the bottom of the housing 11, and the water delivery pipe 17 is provided with a water delivery valve 18. Hot water from the first and second water storage tanks 7, 10 is injected into the mixing water tank 8 through the first and second water injection pipes 13, 14, respectively. The flow rate of the hot water flowing into the mixing water tank 8 is controlled by the first and second water injection valves 15, 16.

[0030] The mixing water tank 8 also includes a motor 19, a reducer 20, a main shaft 21, a bearing 22, and a spiral blade 23. The output end of the motor 19 is connected to the reducer 20, and the output end of the reducer 20 is connected to the main shaft 21. The main shaft 21 is vertically arranged in the box shell 11. The lower end of the main shaft 21 is connected to the reducer 20, and the upper end of the main shaft 21 is connected to the bearing 22. The bearing 22 is arranged on the box shell 11. The outer wall of the main shaft 21 is provided with a spiral blade 23, and the spiral blade 23 is located in the box shell 11. The motor 19 drives the reducer 20 and the main shaft 21 to rotate, and the main shaft 21 drives the spiral blade 23 to rotate. During the rotation of the spiral blade 23, the hot water of different temperatures in the mixing water tank 8 is quickly mixed.

[0031] Heat exchanger 5 includes a heat exchange chamber 24, a smoke inlet pipe 25, a smoke inlet chamber 26, and a coil 27. Heat exchange chamber 24 includes smoke inlet chamber 26, the upper end of which is connected to smoke inlet pipe 25, and the lower end of which is connected to coil 27. Coil 27 is located within heat exchange chamber 24 and is connected to smoke outlet pipe 4. Hot flue gas from the boiler first enters smoke inlet chamber 26, where it is diverted to coil 27. Coil 27 then exchanges heat with the water in heat exchange chamber 24, heating the water.

[0032] The heat exchanger 5 also includes a first water inlet pipe 28, a first water outlet valve 29 and a first water outlet pump 30. The first water inlet pipe 28 is arranged on the heat exchange chamber 24, and the first water outlet pipe 6 is arranged at the lower part of the heat exchange chamber 24. The first water outlet pipe 6 is provided with a first water outlet valve 29 and a first water outlet pump 30.

[0033] A first water supply pipe 31 is provided on the first water storage tank 7, and a first water supply valve 32 is provided on the first water supply pipe 31. The first water supply pipe 31 is connected to the first water outlet pipe 6 of the heat exchanger 5. A first water supply pipe 33 is provided at the lower part of the first water storage tank 7, and a first water supply valve 34 and a first water supply pump 35 are provided on the first water supply pipe 33. The first water supply pipe 33 is connected to the first water injection pipe 13. A second water supply pipe 36 is provided on the second water storage tank 10, and a second water supply valve 37 is provided on the second water supply pipe 36. The second water supply pipe 36 is connected to the second water outlet pipe 9 of the absorption heat pump 1. A second water supply pipe 39 is provided at the lower part of the second water storage tank 10, and a second water supply valve 40 and a second water supply pump 38 are provided on the second water supply pipe 39. The second water supply pipe 39 is connected to the second water injection pipe 14.

[0034] Working principle: The hot flue gas from the boiler first enters the heat exchanger 5 for heat exchange, and the hot water generated by the heat exchanger 5 enters the first water tank 7. After passing through the heat exchanger 5, the hot flue gas enters the absorption heat pump 1 for secondary heat exchange. The hot water from the second heat exchange enters the second water tank 10. The first water tank 7 and the second water tank 10 are both connected to the mixing water tank 8. The main shaft 21 and the spiral blades 23 of the mixing water tank 8 rotate under the drive of the motor 19, so that hot water of different temperatures are quickly mixed.

[0035] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it does not limit the scope of protection of the utility model. On the basis of the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the utility model.

Claims

1. A gas absorption heat pump waste heat utilization device, comprising an absorption heat pump (1), characterized in that: The air outlet pipe (2) of the absorption heat pump (1) is connected to the negative pressure fan, the air inlet pipe (3) of the absorption heat pump (1) is connected to the smoke outlet pipe (4) of the heat exchanger (5), the heat exchanger (5) includes a first water outlet pipe (6), the first water outlet pipe (6) is connected to the first water storage tank (7), the first water storage tank (7) is connected to the mixing water tank (8), the absorption heat pump (1) includes a second water outlet pipe (9), the second water outlet pipe (9) is connected to the second water storage tank (10), and the second water storage tank (10) is connected to the mixing water tank (8).

2. A gas absorption heat pump waste heat utilization device according to claim 1, characterized in that: The mixing water tank (8) comprises a tank shell (11), a support frame (12), a first water injection pipe (13), a second water injection pipe (14), a first water injection valve (15), a second water injection valve (16), a water delivery pipe (17) and a water delivery valve (18). The tank shell (11) is mounted on the support frame (12). The first water injection pipe (13) and the second water injection pipe (14) are provided on the upper portion of the tank shell (11). The first water injection pipe (13) is connected to the first water storage tank (7), and the second water injection pipe (14) is connected to the second water storage tank (10). The first water injection pipe (13) is provided with a first water injection valve (15), and the second water injection pipe (14) is provided with a second water injection valve (16). The lower end of the tank shell (11) is provided with a water delivery pipe (17), and the water delivery pipe (17) is provided with a water delivery valve (18).

3. A gas absorption heat pump waste heat utilization device according to claim 2, characterized in that: The mixing water tank (8) further comprises a motor (19), a reducer (20), a main shaft (21), a bearing (22) and a spiral blade (23), wherein the output end of the motor (19) is connected to the reducer (20), and the output end of the reducer (20) is connected to the main shaft (21), and the main shaft (21) is vertically arranged in the box shell (11), the lower end of the main shaft (21) is connected to the reducer (20), and the upper end of the main shaft (21) is connected to the bearing (22), and the bearing (22) is arranged on the box shell (11), and the spiral blade (23) is arranged on the outer wall of the main shaft (21), and the spiral blade (23) is located in the box shell (11).

4. The gas absorption heat pump waste heat utilization device according to claim 1, characterized in that: The heat exchanger (5) comprises a heat exchange chamber (24), a smoke inlet pipe (25), a smoke inlet chamber (26) and a coil (27). The smoke inlet chamber (26) is provided in the heat exchange chamber (24). The upper end of the smoke inlet chamber (26) is connected to the smoke inlet pipe (25). The lower end of the smoke inlet chamber (26) is connected to the coil (27). The coil (27) is provided in the heat exchange chamber (24) and is connected to the smoke outlet pipe (4).

5. A gas absorption heat pump waste heat utilization device according to claim 4, characterized in that: The heat exchanger (5) further comprises a first water inlet pipe (28), a first water outlet valve (29) and a first water outlet pump (30); the first water inlet pipe (28) is provided on the heat exchange chamber (24); a first water outlet pipe (6) is provided at the lower portion of the heat exchange chamber (24); and the first water outlet pipe (6) is provided with a first water outlet valve (29) and a first water outlet pump (30).

6. The gas absorption heat pump waste heat utilization device according to claim 1, characterized in that: A first water supply pipe (31) is provided on the first water storage tank (7), a first water supply valve (32) is provided on the first water supply pipe (31), and the first water supply pipe (31) is connected to the first water outlet pipe (6) of the heat exchanger (5). A first water delivery pipe (33) is provided at the lower part of the first water storage tank (7), a first water delivery valve (34) and a first water delivery pump (35) are provided on the first water delivery pipe (33), and the first water delivery pipe (33) is connected to the first water injection pipe (13). A second water supply pipe (36) is provided on the second water storage tank (10), a second water supply valve (37) is provided on the second water supply pipe (36), and the second water supply pipe (36) is connected to the second water outlet pipe (9) of the absorption heat pump (1). A second water delivery pipe (39) is provided at the lower part of the second water storage tank (10), a second water delivery valve (40) and a second water delivery pump (38) are provided on the second water delivery pipe (39), and the second water delivery pipe (39) is connected to the second water injection pipe (14).

Images