Sewage heat exchange device and sewage cooling system

Abstract

The utility model discloses a sewage heat exchange device and a sewage cooling system.The sewage heat exchange device is provided with a heat exchanger, a heating medium feeding module, a heating medium discharging module, a filter and a backwashing module, the heating medium feeding module and the heating medium discharging module are connected with the heat exchanger, and the heating medium feeding module can convey sewage in a sewage pool to the heat exchanger and then filter the sewage in the sewage pool; the filter is arranged on the heating medium feeding module, the sewage can be filtered through the filter before entering the heat exchanger for heat exchange, then the slag content entering the heat exchanger is reduced, the backwash module is connected with the heating medium discharging module, and the backwash module is connected with the backwash module; the heat exchanger can be reversely washed regularly, so that residues in the heat exchanger are taken away, the heat exchanger is cleaned, the heat exchanger does not need to be disassembled and cleaned, and convenience is provided for use of the heat exchanger and cooling of sewage.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage heat exchange device and a sewage cooling system. Background Art

[0002] In order to avoid high temperatures in the biochemical system of the sewage treatment plant in summer or overheating of the system after deodorization and covering, it is necessary to use a plate heat exchanger such as the one with announcement number CN218846970U to exchange heat and cool the sewage.

[0003] Although sewage can be cooled by installing a heat exchanger, the heat exchanger is easily clogged by the residue in the sludge in the sewage. At that time, the heat exchanger needs to be frequently disassembled and cleaned, which causes inconvenience to the use of the heat exchanger. Utility Model Content

[0004] The purpose of the present invention is to overcome the above technical deficiencies and to provide a sewage heat exchange device to solve the technical problem in the prior art that the heat exchange device needs to be frequently disassembled and cleaned.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a sewage heat exchange device, comprising:

[0007] Heat exchanger, for heat exchange;

[0008] A heat medium supply module, connected to the heat exchanger, for supplying heat medium to the heat exchanger;

[0009] A heat medium outlet module is connected to the heat exchanger and is used to outlet the heat medium after heat exchange in the heat exchanger;

[0010] a filter, installed in the heat medium supply module, for filtering the heat medium supplied by the heat medium supply module; and

[0011] A backwash module is connected to the heat medium outlet module and is used for backwashing the heat exchanger.

[0012] In some embodiments, the backwash module includes a flushing unit and a drainage unit. The flushing unit is connected to the heat medium outlet module and is used to reversely pass fluid into the heat exchanger through the heat medium outlet module. The drainage unit is connected to the heat medium supply module and is used to discharge the fluid passed into the flushing unit.

[0013] In some embodiments, the flushing unit includes a water supply pipe and a water inlet control valve. The water supply pipe is connected to the heat medium outlet module and is used to connect to a water supply device to supply water to the heat medium outlet module through the water supply device. The water inlet control valve is installed on the water supply pipe to control the on and off of the water supply pipe.

[0014] In some embodiments, the flushing unit also includes an air supply pipe and an air intake control valve. The air supply pipe is connected to the heat medium outlet module and is used to connect to the air supply equipment to supply compressed air to the heat medium outlet module through the air supply equipment. The air intake control valve is installed on the air supply pipe to control the on and off of the air supply pipe.

[0015] In some embodiments, the drainage unit includes a backwash drain pipe and a backwash control valve. The backwash drain pipe is connected to the heat medium supply module. The backwash control valve is installed on the backwash drain pipe to control the on / off of the backwash drain pipe.

[0016] In some embodiments, the heat medium supply module includes a heat medium water inlet pipe and a heat medium water inlet valve. The heat medium water inlet pipe is connected to the heat medium inlet of the heat exchanger. The heat medium water inlet valve is installed on the heat medium water inlet pipe to control the on-off of the heat medium water inlet pipe.

[0017] In some embodiments, the heat medium outlet module includes a heat medium outlet pipe and a heat medium outlet valve. The heat medium outlet pipe is connected to the heat medium outlet of the heat exchanger. The heat medium outlet valve is installed on the heat medium outlet pipe to control the on and off of the heat medium outlet pipe.

[0018] In some embodiments, the sewage heat exchange device further includes a refrigerant inlet pipe and a refrigerant outlet pipe, and the refrigerant inlet pipe and the refrigerant outlet pipe are respectively connected to the refrigerant inlet and the refrigerant outlet of the heat exchanger.

[0019] In the second aspect, the utility model provides a sewage cooling system, including a sewage pool, a sewage conveying module, a cooling module and the sewage heat exchange device, the sewage conveying module is connected to the sewage pool and the heat medium supply module, and is used to convey the sewage in the sewage pool to the heat medium supply module, the heat medium outlet module is connected to the sewage pool, and is used to pass the sewage after heat exchange into the sewage pool, and the cooling module is connected to the heat exchanger, and is used to pass cold water into and out of the heat exchanger.

[0020] In some embodiments, the sewage cooling system further includes an air supply module, which is connected to the heat medium water inlet pipe and the air supply pipe and is used to supply air to the heat medium water inlet pipe and the air supply pipe.

[0021] Compared with the prior art, the sewage heat exchange device provided by the present invention is provided with a heat exchanger, a heat medium supply module, a heat medium outlet module, a filter and a backwash module. The heat medium supply module and the heat medium outlet module are connected to the heat exchanger. The heat medium supply module can transport the sewage from the sewage pool to the heat exchanger, and then pass it out through the heat medium outlet module. The heat exchange of the heat exchanger is used to cool the sewage. The filter is installed on the heat medium supply module. Before the sewage enters the heat exchanger for heat exchange, it can be filtered through the filter first, thereby reducing the amount of residue entering the heat exchanger. The backwash module is connected to the heat medium outlet module, and the heat exchanger can be backwashed regularly to take away the residue inside the heat exchanger, thereby cleaning the heat exchanger. There is no need to disassemble the heat exchanger for cleaning, which provides convenience for the use of the heat exchanger and the cooling of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a sewage heat exchange device provided by an embodiment of the present utility model;

[0023] Figure 2 It is a structural diagram of a sewage cooling system provided by an embodiment of the present utility model.

[0024] Reference numerals in the figures:

[0025] 10—heat exchanger 11—heat medium inlet 12—heat medium outlet

[0026] 13—Refrigeration medium inlet 14—Refrigeration medium outlet 20—Heat medium supply module

[0027] 21 - Heat medium inlet pipe 22 - Heat medium inlet valve 30 - Heat medium outlet module

[0028] 31 - Heat medium outlet pipe 32 - Heat medium outlet valve 40 - Filter

[0029] 50—Backwash module 51—Flush unit 52—Drainage unit

[0030] 53 - Air supply module 54 - Flushing water supply module 60 - Sewage tank

[0031] 61-Aerobic tank 62-Anaerobic tank 70-Sewage transport module

[0032] 80—Cooling module 81—Refrigerant water inlet pipe 82—Refrigerant water outlet pipe

[0033] 83—Cooling tower 511—Water supply pipe 512—Water inlet control valve

[0034] 513—Air supply pipe 514—Air intake control valve 521—Backwash drain pipe

[0035] 522—Backwash control valve. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] In order to solve the technical problem in the prior art that heat exchange devices need to be frequently disassembled and cleaned, an embodiment of the utility model provides a sewage heat exchange device, which can filter sewage before heat exchange and, by regularly backwashing the heat exchanger, eliminates the need to disassemble and clean the heat exchanger.

[0038] In order to achieve the above technical objectives, the sewage heat exchange device provided by the embodiment of the present invention is as follows: Figure 1-2 As shown, it includes a heat exchanger 10, a heat medium supply module 20, a heat medium outlet module 30, a filter 40 and a backwash module 50. The heat exchanger 10 is used for heat exchange; the heat medium supply module 20 is connected to the heat exchanger 10 and is used to supply heat medium to the heat exchanger 10; the heat medium outlet module 30 is connected to the heat exchanger 10 and is used to discharge the heat medium after heat exchange in the heat exchanger 10; the filter 40 is installed on the heat medium supply module 20 and is used to filter the heat medium supplied by the heat medium supply module 20; the backwash module 50 is connected to the heat medium outlet module 30 and is used to backwash the heat exchanger 10.

[0039] Specifically, the sewage heat exchange device is provided with a heat exchanger 10, a heat medium supply module 20, a heat medium outlet module 30, a filter 40 and a backwash module 50. The heat medium supply module 20 and the heat medium outlet module 30 are connected to the heat exchanger 10. The heat medium supply module 20 can transport sewage from the sewage pool 60 to the heat exchanger 10, and then pass it out through the heat medium outlet module 30. The heat exchange of the heat exchanger 10 is used to cool the sewage. The filter 40 is installed on the heat medium supply module 20. Before the sewage enters the heat exchanger 10 for heat exchange, it can be filtered through the filter 40, thereby reducing the amount of slag entering the heat exchanger 10. The backwash module 50 is connected to the heat medium outlet module 30, and can regularly backwash the heat exchanger 10, thereby removing the slag inside the heat exchanger 10 and cleaning the heat exchanger 10. There is no need to disassemble the heat exchanger 10 for cleaning, which provides convenience for the use of the heat exchanger 10 and the cooling of sewage.

[0040] It is understandable that the radiator can be any heat exchange device that can cool sewage, such as an air-cooled heat exchanger 10 or a water-cooled heat exchanger 10.

[0041] In this embodiment, the heat exchanger 10 is a plate heat exchanger 10, such as Figure 1-2As shown, the heat exchanger 10 is provided with a heat medium inlet 11, a heat medium outlet 12, a refrigerant inlet 13 and a refrigerant outlet 14. Cold water enters the heat exchanger 10 through the refrigerant inlet 13 and then passes out through the refrigerant outlet 14. The heat medium supply module 20 passes the high-temperature sewage into the heat exchanger 10 from the heat medium inlet 11, exchanges heat with the cold water in the heat exchanger 10, and then passes out from the heat medium outlet 12 and is discharged through the heat medium outlet module 30.

[0042] In one embodiment, Figure 1-2 As shown, the heat medium supply module 20 includes a heat medium water inlet pipe 21 and a heat medium water inlet valve 22. The heat medium water inlet pipe 21 is connected to the heat medium inlet 11 of the heat exchanger 10. The heat medium water inlet valve 22 is installed on the heat medium water inlet pipe 21 to control the on / off of the heat medium water inlet pipe 21. Specifically, when performing sewage heat exchange operation, the heat medium water inlet valve 22 is opened, and sewage flows into the heat exchanger 10 through the heat medium water inlet pipe 21, thereby realizing the supply of sewage to the heat exchanger 10. When the heat exchanger 10 is backwashed, the heat medium water inlet valve 22 is closed.

[0043] In one embodiment, Figure 1-2 As shown, the heat medium outlet module 30 includes a heat medium outlet pipe 31 and a heat medium outlet valve 32. The heat medium outlet pipe 31 is connected to the heat medium outlet 12 of the heat exchanger 10. The heat medium outlet valve 32 is installed on the heat medium outlet pipe 31 to control the on / off of the heat medium outlet pipe 31. Specifically, when performing sewage heat exchange operation, the heat medium outlet valve 32 is opened, and sewage flows into the heat medium outlet pipe 31 through the heat exchanger 10, thereby achieving sewage discharge to the heat exchanger 10. When the heat exchanger 10 is backwashed, the heat medium outlet valve 32 is closed.

[0044] It can be understood that the backwash module 50 can be a water pipe connected to the heat medium inlet 11 and the heat medium outlet 12. The flushing water enters the heat exchanger 10 from the heat medium outlet 12 and then flows out from the heat medium inlet 11, so that the flow direction of the flushing water is opposite to the flow direction during sewage heat exchange, thereby backwashing the heat exchanger 10 to effectively remove the residue attached to the heat exchanger 10.

[0045] In one embodiment, Figure 1-2 As shown, the backwash module 50 includes a flushing unit 51 and a drainage unit 52. The flushing unit 51 is connected to the heat medium outlet module 30 and is used to reversely pass fluid into the heat exchanger 10 through the heat medium outlet module 30. The drainage unit 52 is connected to the heat medium supply module 20 and is used to discharge the fluid passed by the flushing unit 51. Specifically, the backwash module 50 is provided with the flushing unit 51 and the drainage unit 52. When backwashing the heat exchanger 10, the flushing unit 51 passes fluid into the heat medium outlet module 30. The fluid enters the heat exchanger 10 through the heat medium outlet module 30 to flush the heat exchanger 10. The passed fluid enters the heat medium supply module from the heat exchanger 10 and is finally discharged from the drainage module.

[0046] In this embodiment, the fluid may be a fluid substance such as air or water that can flush the heat exchanger.

[0047] In one embodiment, Figure 1-2 As shown, the flushing unit 51 includes a water supply pipe 511 and a water inlet control valve 512. The water supply pipe 511 is connected to the heat medium outlet module 30 and is used to connect to a water supply device to supply water to the heat medium outlet module 30 through the water supply device. The water inlet control valve 512 is installed on the water supply pipe 511 and is used to control the on-off of the water supply pipe 511. Specifically, when performing sewage heat exchange operation, the water inlet control valve 512 is closed. When performing backwashing operation of the heat exchanger 10, the water inlet control valve 512 is opened, and flushing water enters the heat exchanger 10 from the water supply pipe 511 and the heat medium outlet module 30 in sequence to flush the heat exchanger 10. The flushing water is finally discharged through the drainage module.

[0048] In one embodiment, Figure 1-2 As shown, the flushing unit 51 further includes an air supply pipe 513 and an air intake control valve 514. The air supply pipe 513 is connected to the heat medium outlet module 30 and is used to connect to an air supply device so as to supply compressed air to the heat medium outlet module 30 through the air supply device. The air intake control valve 514 is installed on the air supply pipe 513 and is used to control the on-off state of the air supply pipe 513. Specifically, when performing sewage heat exchange operation, the air intake control valve 514 is closed. When performing backwashing operation of the heat exchanger 10, the air intake control valve 514 is opened, and compressed air enters the heat exchanger 10 from the air supply pipe 513 and the heat medium outlet module 30 in sequence, thereby flushing the heat exchanger 10 with the compressed air.

[0049] In this embodiment, the heat exchanger 10 can be backwashed with water alone, compressed air alone, or a combination of water and compressed air. The flushing water supply pressure is 0.2-0.6 MPa, and the compressed air supply pressure is 0.4-1.0 MPa. Water flushing alone is performed continuously for 5-30 minutes, with the color and transparency of the water at the outlet visually consistent with the flushing water. For both compressed air flushing alone and backwashing with water and compressed air, the air inlet control valve 514 is opened intermittently, with a compressed air flow rate of ≥20 m / s, and the intermittent flushing time is 20-60 seconds.

[0050] In one embodiment, Figure 1-2As shown, the drainage unit 52 includes a backwash drain pipe 521 and a backwash control valve 522. The backwash drain pipe 521 is connected to the heat medium supply module 20. The backwash control valve 522 is installed on the backwash drain pipe 521 to control the on / off of the backwash drain pipe 521. Specifically, when performing sewage heat exchange operation, the backwash control valve 522 is closed. When performing backwash operation of the heat exchanger 10, the backwash control valve 522 is opened, and water and compressed air enter the heat medium supply module and are then discharged through the backwash drain pipe 521.

[0051] In one embodiment, the filter 40 is a basket-type filter 40, and the filter mesh accuracy of the filter 40 is 1 to 10 mm. The purpose is to reduce the fouling rate of the plate heat exchanger 10, intercept the fibrous fouling in the mud-water mixture of the biochemical system in advance, and reduce the backwashing frequency and disassembly and cleaning frequency of the plate heat exchanger 10.

[0052] In one embodiment, Figure 1-2 As shown, the sewage heat exchange device further includes a refrigerant inlet pipe 81 and a refrigerant outlet pipe 82, which are respectively connected to the refrigerant inlet 13 and the refrigerant outlet 14 of the heat exchanger 10. Specifically, cold water enters the heat exchanger 10 through the refrigerant inlet pipe 81, exchanges heat with the sewage, and then exits through the refrigerant outlet pipe 82, achieving water cooling of the sewage.

[0053] The present invention also provides a sewage cooling system. Figure 2 As shown, it includes a sewage pool 60, a sewage conveying module 70, a cooling module 80 and a sewage heat exchange device. The sewage conveying module 70 is connected to the sewage pool 60 and the heat medium supply module 20, and is used to convey the sewage in the sewage pool 60 to the heat medium supply module 20. The heat medium outlet module 30 is connected to the sewage pool 60, and is used to pass the sewage after heat exchange into the sewage pool 60. The cooling module 80 is connected to the heat exchanger 10, and is used to pass cold water into and out of the heat exchanger 10.

[0054] Specifically, when cooling the sewage in the sewage pool 60, the sewage conveying module 70 conveys the sewage to the heat medium supply module 20, and then passes it into the heat exchanger 10 for heat exchange. After heat exchange, it is discharged from the heat medium outlet module 30 to the sewage pool 60, thereby achieving the cooling of the sewage. The cooling module 80 can cool the cold water after heat exchange in the heat exchanger 10.

[0055] In this embodiment, the sewage pool 60 is provided with an aerobic pool 61 and an anaerobic pool 62 , and the sewage in the aerobic pool 61 is cooled and then introduced into the anaerobic pool 62 .

[0056] In this embodiment, Figure 2As shown, the sewage transport module 70 includes a pump body and a pipe. The pipe is connected to the aerobic tank 61 and the heat medium inlet pipe 21. The pump body is installed on the pipe and can pump sewage from the aerobic tank 61 to the heat medium inlet pipe 21. The heat medium outlet pipe 31 is connected to the anaerobic tank 62.

[0057] In this embodiment, Figure 2 As shown, the cooling module 80 is connected to the refrigerant water inlet pipe 81 and the refrigerant water outlet pipe 82 , and can cool the cold water flowing out of the refrigerant water outlet pipe 82 before flowing into the refrigerant water inlet pipe 81 .

[0058] In this embodiment, Figure 2 As shown, the cooling module 80 includes a cooling tower 83 and a circulation pump. The cold water output from the refrigerant outlet pipe 82 enters the cooling tower 83 for cooling and is then pumped to the refrigerant inlet pipe 81 through the circulation pump.

[0059] In one embodiment, Figure 2 As shown, the sewage cooling system further includes an air supply module 53, which is connected to the heat medium water inlet pipe 21 and the air supply pipe 513 and is configured to supply air to the heat medium water inlet pipe 21 and the air supply pipe 513. Specifically, in addition to supplying compressed air for backwashing to the air supply pipe 513, the air supply module 53 can also supply compressed air to the heat medium water inlet pipe 21, thereby enabling forward flushing of the heat exchanger 10.

[0060] In one embodiment, Figure 2 As shown, the sewage cooling system also includes a flushing water supply module 54, which is connected to the heat medium water inlet pipe 21 and the air supply pipe 513, and is used to supply air to the heat medium water inlet pipe 21 and the air supply pipe 513, and is connected to the cooling tower 83 and the water supply pipe 511. Specifically, in addition to providing flushing water required for backwashing to the water supply pipe 511, the flushing water supply module 54 can also flow water into the heat medium water inlet pipe 21 to achieve forward flushing of the heat exchanger 10, and can also supply water to the cooling tower 83 to facilitate cooling of the cold water and replenish cold water for the heat exchanger 10.

[0061] In order to better understand the present invention, the following Figures 1 to 2The technical solution of the utility model is described in detail: when cooling the sewage, the cold water is pumped to the refrigerant inlet pipe 81 through the cooling tower 83, and then enters the heat exchanger 10, and finally enters the cooling tower 83 from the refrigerant outlet pipe 82 for cooling. The sewage from the aerobic pool 61 is transported to the heat medium inlet pipe 21 through the sewage transport module 70, and then filtered through the filter 40 and enters the heat exchanger 10. After heat exchange and cooling with the cold water of the heat exchanger 10, it is passed through the heat medium outlet pipe 31 and then enters the anaerobic pool 62, achieving When cooling the sewage and cleaning the heat exchanger 10, the air supply module 53 or the flushing water supply module 54 supplies compressed air or flushing water to the air supply pipe 513 or the water supply pipe 511 respectively. After the compressed air or flushing water enters the heat exchanger 10, it is finally discharged from the backwash drain pipe 521 to perform reverse flushing on the heat exchanger 10. At the same time, the air supply module 53 or the flushing water supply module 54 can also pass compressed air or flushing water into the heat medium inlet pipe 21 to perform forward flushing on the heat exchanger 10.

[0062] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A sewage heat exchange device, characterized in that: include: Heat exchanger, for heat exchange; A heat medium supply module, connected to the heat exchanger, for supplying heat medium to the heat exchanger; A heat medium outlet module is connected to the heat exchanger and is used to outlet the heat medium after heat exchange in the heat exchanger; a filter, installed in the heat medium supply module, for filtering the heat medium supplied by the heat medium supply module; and A backwash module is connected to the heat medium outlet module and is used for backwashing the heat exchanger.

2. The sewage heat exchange device according to claim 1, characterized in that: The backwash module includes a flushing unit and a drainage unit. The flushing unit is connected to the heat medium outlet module and is used to reversely pass fluid into the heat exchanger through the heat medium outlet module. The drainage unit is connected to the heat medium supply module and is used to discharge the fluid passed into the flushing unit.

3. The sewage heat exchange device according to claim 2, characterized in that: The flushing unit includes a water supply pipe and a water inlet control valve. The water supply pipe is connected to the heat medium outlet module and is used to connect to a water supply device to supply water to the heat medium outlet module through the water supply device. The water inlet control valve is installed on the water supply pipe to control the on and off of the water supply pipe.

4. The sewage heat exchange device according to claim 2, characterized in that: The flushing unit also includes an air supply pipe and an air intake control valve. The air supply pipe is connected to the heat medium outlet module and is used to connect to the air supply equipment to supply compressed air to the heat medium outlet module through the air supply equipment. The air intake control valve is installed on the air supply pipe to control the on and off of the air supply pipe.

5. The sewage heat exchange device according to claim 2, characterized in that: The drainage unit includes a backwash drainage pipe and a backwash control valve. The backwash drainage pipe is connected to the heat medium supply module. The backwash control valve is installed on the backwash drainage pipe to control the on and off of the backwash drainage pipe.

6. The sewage heat exchange device according to any one of claims 1 to 5, characterized in that: The heat medium supply module includes a heat medium water inlet pipe and a heat medium water inlet valve. The heat medium water inlet pipe is connected to the heat medium inlet of the heat exchanger. The heat medium water inlet valve is installed on the heat medium water inlet pipe to control the on and off of the heat medium water inlet pipe.

7. The sewage heat exchange device according to any one of claims 1 to 5, characterized in that: The heat medium outlet module includes a heat medium outlet pipe and a heat medium outlet valve. The heat medium outlet pipe is connected to the heat medium outlet of the heat exchanger. The heat medium outlet valve is installed on the heat medium outlet pipe to control the on and off of the heat medium outlet pipe.

8. The sewage heat exchange device according to any one of claims 1 to 5, characterized in that: The sewage heat exchange device also includes a refrigerant inlet pipe and a refrigerant outlet pipe, and the refrigerant inlet pipe and the refrigerant outlet pipe are respectively connected to the refrigerant inlet and the refrigerant outlet of the heat exchanger.

9. A sewage cooling system, characterized in that: It includes a sewage pool, a sewage conveying module, a cooling module and the sewage heat exchange device according to any one of claims 1 to 8, the sewage conveying module is connected to the sewage pool and the heat medium supply module, and is used to convey the sewage in the sewage pool to the heat medium supply module, the heat medium outlet module is connected to the sewage pool, and is used to pass the sewage after heat exchange into the sewage pool, and the cooling module is connected to the heat exchanger, and is used to pass cold water into and out of the heat exchanger.

10. The sewage cooling system according to claim 9, characterized in that: The sewage cooling system further includes an air supply module, which is connected to the heat medium water inlet pipe and the air supply pipe and is used to supply air to the heat medium water inlet pipe and the air supply pipe.

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