Online cleaning device for landfill leachate plate heat exchanger

Abstract

The utility model belongs to the technical field of heat exchanger cleaning, and particularly relates to a landfill leachate plate heat exchanger online cleaning device which comprises a plate heat exchanger and a cleaning assembly, the cleaning assembly comprises a cleaning water tank and a cleaning pump, and a first water inlet end and a first water outlet end are arranged on one side of the plate heat exchanger. A second water inlet end and a second water outlet end are arranged on the other side of the plate heat exchanger; the side, close to the first water inlet end, of the plate heat exchanger is in pipeline connection with a third water inlet valve. The side, close to the first water outlet end, of the plate heat exchanger is in pipeline connection with a third water outlet valve. The side, close to the second water inlet end, of the plate heat exchanger is in pipeline connection with a fourth water inlet valve. The side, close to the second water outlet end, of the plate heat exchanger is in pipeline connection with a fourth water outlet valve. By arranging the third water inlet valve, the third water outlet valve, the fourth water inlet valve and the fourth water outlet valve, the two sides of the plate heat exchanger can be cleaned, and the plate heat exchanger can be better cleaned.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchanger cleaning, and in particular relates to an online cleaning device for a landfill leachate plate-type heat exchanger. Background Art

[0002] During microbial degradation, the temperature in the biochemical pool continues to rise due to the metabolism of microorganisms and the blowing effect of the aeration fan. When the temperature exceeds the optimal growth temperature of microorganisms, it will affect the metabolism of microorganisms, thereby reducing the degradation of pollutants by microorganisms in the pool. The plate heat exchanger is a heat exchanger with a small footprint and its own flow channel advantages. In leachate treatment, the plate heat exchanger and cooling device are preferably used to exchange hot and cold media in the biochemical pool, which can effectively reduce the temperature in the biochemical pool.

[0003] With the extension of the operation time of the plate heat exchanger in summer or the long-term idleness of the plate heat exchanger in winter, a large amount of activated sludge and scaling will accumulate in the flow channel of the plate heat exchanger, which will reduce the heat exchange efficiency of the plate heat exchanger and affect the metabolism of microorganisms in the biochemical pool. At present, the plate heat exchangers in most leachate treatment projects are disassembled for maintenance and cleaning. The sludge attached to the plates is then washed off with external industrial water pipes, and the scaling is cleaned by immersion in chemicals. The disassembly process of this method generally has the problems of high labor consumption, time-consuming and labor-intensive, environmental problems such as sludge scattering, sewage splashing, acid and alkali corrosion, and leakage caused by poor sealing during the secondary assembly of the heat exchanger plates. Utility Model Content

[0004] The purpose of the utility model is to provide an online cleaning device for a landfill leachate plate heat exchanger to solve the technical problem that the plate heat exchanger is blocked by sludge during the heat exchange process for a biochemical pool, and the heat exchanger needs to be disassembled for flushing, which has high labor and time costs and reduces the heat exchange efficiency of the biochemical pool. The utility model achieves the purpose of cleaning without disassembling the heat exchanger, reducing manpower and material resources and improving the heat exchange efficiency of the biochemical pool.

[0005] In order to solve the above technical problems, the utility model provides an online cleaning device for a landfill leachate plate heat exchanger, comprising: a plate heat exchanger and a cleaning assembly, wherein the plate heat exchanger is connected to the cleaning assembly via a pipeline;

[0006] The cleaning assembly includes a cleaning water tank and a cleaning pump, the cleaning water tank is connected to the input end of the cleaning pump through a steel hose, and the output end of the cleaning pump is connected to the plate heat exchanger through the steel hose;

[0007] A first water inlet and a first water outlet are provided on one side of the plate heat exchanger, and the first water inlet and the first water outlet are respectively provided at both ends of the plate heat exchanger; a second water inlet and a second water outlet are provided on the other side of the plate heat exchanger, and the second water inlet and the second water outlet are respectively provided at both ends of the plate heat exchanger;

[0008] The pipe on one side of the plate heat exchanger close to the first water inlet end is connected to a third water inlet valve, and the pipe on one side of the plate heat exchanger close to the first water outlet end is connected to a third water outlet valve; the pipe on one side of the plate heat exchanger close to the second water inlet end is connected to a fourth water inlet valve, and the pipe on one side of the plate heat exchanger close to the second water outlet end is connected to a fourth water outlet valve.

[0009] Furthermore, the first water inlet pipe is connected to a biochemical pool, the third water inlet valve is arranged between the plate heat exchanger and the biochemical pool, one end of the third water inlet valve is connected to the plate heat exchanger and the biochemical pool, and the other end of the third water inlet valve is used to connect to the cleaning water tank.

[0010] Furthermore, the second water inlet pipe is connected to a cooling tower, and the fourth water inlet valve is arranged between the plate heat exchanger and the cooling tower. One end of the fourth water inlet valve is connected to the plate heat exchanger and the cooling tower, and the other end of the fourth water inlet valve is used to connect to the cleaning water tank.

[0011] Furthermore, the pipes on both sides of the plate heat exchanger are connected with a heat exchange component, and the heat exchange component includes a hot water pump, a first water inlet valve, a cold water pump, a second water inlet valve, several thermometers and several pressure gauges.

[0012] Furthermore, the biochemical pool is sequentially provided with the hot water pump, the thermometer, the pressure gauge and the first water inlet valve along the water flow direction, and the third water inlet valve is provided between the first water inlet valve and the first water inlet end.

[0013] Furthermore, the cooling tower is provided with the cold water pump, the thermometer, the pressure gauge and the second water inlet valve in sequence along the water flow direction, and the fourth water inlet valve is provided between the second water inlet valve and the second water inlet end.

[0014] Furthermore, the first water outlet pipe is connected to a first water outlet valve, the third water outlet valve is arranged between the first water outlet valve and the first water outlet, one end of the third water outlet valve is connected to the first water outlet valve and the first water outlet, and the other end of the third water outlet valve is used to connect to the wastewater tank.

[0015] Furthermore, the other end of the first water outlet valve is connected to the biochemical pool, and the pressure gauge and the thermometer are sequentially provided at the first water outlet along the water flow direction, and the pressure gauge and the thermometer are arranged between the first water outlet valve and the biochemical pool.

[0016] Furthermore, the second water outlet pipe is connected to a second water outlet valve, the fourth water outlet valve is provided between the second water outlet valve and the second water outlet, one end of the fourth water outlet valve is connected to the second water outlet valve and the second water outlet, and the other end of the fourth water outlet valve is used to connect to the wastewater tank;

[0017] The second water outlet valve is sequentially provided with the pressure gauge and the thermometer along the water flow direction.

[0018] Furthermore, cleaning agents are placed inside the cleaning water tank, and a number of universal wheels are installed at the bottom end of the cleaning water tank; the steel wire hose is connected to the cleaning water tank and the cleaning pump respectively through flange joints.

[0019] The beneficial effects of the utility model are:

[0020] By setting a third water inlet valve and a third water outlet valve, a steel wire hose is used to connect the cleaning water tank, the cleaning pump and the third water inlet valve. The third water inlet valve and the third water outlet valve are opened, and the other valves are closed. The cleaning pump flows the cleaning agent in the cleaning water tank into the plate heat exchanger from the first water inlet end through the third water inlet valve. The cleaning agent rinses one side of the plate heat exchanger and flows out from the first water outlet end through the third water outlet valve to the wastewater pool. Similarly, the steel wire hose is connected to the fourth water inlet valve, the fourth water inlet valve and the fourth outlet valve are opened, and the other valves are closed. The cleaning agent flows into the plate heat exchanger from the second water inlet end through the fourth inlet valve to rinse the other side of the plate heat exchanger, and the waste liquid flows from the fourth water outlet end through the fourth outlet valve to the wastewater pool. The utility model discharges the sludge accumulated between the heat exchange plates without disassembling the plate heat exchanger, greatly reducing personnel input and labor intensity, and avoiding environmental problems such as sludge scattering and sewage splashing when disassembling the heat exchanger.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 The utility model is a structural schematic diagram of an online cleaning device for a landfill leachate plate heat exchanger.

[0024] In the figure: 1. Plate heat exchanger; 11. First water inlet end; 111. Third water inlet valve; 12. First water outlet end; 121. First water outlet valve; 122. Third water outlet valve; 13. Second water inlet end; 131. Fourth water inlet valve; 14. Second water outlet end; 141. Second water outlet valve; 142. Fourth water outlet valve; 2. Cleaning component; 21. Cleaning water tank; 22. Cleaning pump; 3. Biochemical pool; 4. Cooling tower; 5. Heat exchange component; 51. Hot water pump; 511. First water inlet valve; 52. Cold water pump; 521. Second water inlet valve; 53. Thermometer; 54. Pressure gauge. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0026] Example:

[0027] like Figure 1 As shown, an online cleaning device for a landfill leachate plate heat exchanger includes: a plate heat exchanger 1 and a cleaning component 2, the plate heat exchanger 1 and the cleaning component 2 are connected by a pipeline; the cleaning component 2 includes a cleaning water tank 21 and a cleaning pump 22, the cleaning water tank 21 is connected to the input end of the cleaning pump 22 through a steel hose, and the output end of the cleaning pump 22 is connected to the plate heat exchanger 1 through the steel hose; a cleaning agent is placed inside the cleaning water tank 21, and a plurality of universal wheels are installed at the bottom end of the cleaning water tank 21; the steel hose is respectively connected to the cleaning water tank 21 and the cleaning pump 22 through a flange joint; the cleaning agent mainly consists of aminosulfonic acid and sodium hydroxide, and the cleaning pump 22 and the steel hose have strong corrosion resistance to prevent corrosion by the cleaning agent; the cleaning agent flows into the plate heat exchanger 1 through the cleaning pump 22 to react with the sludge and is discharged outside the plate heat exchanger 1.

[0028] Among them, a first water inlet end 11 and a first water outlet end 12 are provided on one side of the plate heat exchanger 1, and the first water inlet end 11 and the first water outlet end 12 are respectively provided at both ends of the plate heat exchanger 1; a second water inlet end 13 and a second water outlet end 14 are provided on the other side of the plate heat exchanger 1, and the second water inlet end 13 and the second water outlet end 14 are respectively provided at both ends of the plate heat exchanger 1; the pipe on the side of the plate heat exchanger 1 close to the first water inlet end 11 is connected to the third water inlet valve 111, and the pipe on the side of the plate heat exchanger 1 close to the first water outlet end 12 is connected to the third water outlet valve 122; the pipe on the side of the plate heat exchanger 1 close to the second water inlet end 13 is connected to the fourth water inlet valve 131, and the pipe on the side of the plate heat exchanger 1 close to the second water outlet end 14 is connected to the fourth water outlet valve 142.

[0029] In this embodiment, the first water inlet end 11 is connected to the biochemical pool 3 through a pipeline, and the third water inlet valve 111 is provided between the plate heat exchanger 1 and the biochemical pool 3. One end of the third water inlet valve 111 is communicated between the plate heat exchanger 1 and the biochemical pool 3, and the other end of the third water inlet valve 111 is used to communicate with the cleaning water tank 21; when the cleaning component 2 is connected to the third water inlet valve 111, the cleaning agent enters the plate heat exchanger 1 through the third water inlet valve 111 and the first water inlet end 11; the second water inlet end 13 is connected to the cooling tower 4 through a pipeline, and the fourth water inlet valve 131 is provided between the plate heat exchanger 1 and the cooling tower 4. One end of the fourth water inlet valve 131 is communicated between the plate heat exchanger 1 and the cooling tower 4, and the other end of the fourth water inlet valve 131 is used to communicate with the cleaning water tank 21; when the cleaning component 2 is connected to the fourth water inlet valve 131, the cleaning agent enters the plate heat exchanger 1 through the fourth water inlet valve 131 and the second water inlet end 13.

[0030] In this embodiment, the pipes on both sides of the plate heat exchanger 1 are connected to the heat exchange assembly 5, which includes a hot water pump 51, a first water inlet valve 511, a cold water pump 52, a second water inlet valve 521, several thermometers 53 and several pressure gauges 54; the biochemical pool 3 is sequentially provided with a hot water pump 51, a thermometer 53, a pressure gauge 54 and a first water inlet valve 511 along the water flow direction, and the third water inlet valve 111 is provided between the first water inlet valve 511 and the first water inlet end 11; the cooling tower 4 is sequentially provided with a cold water pump 52, a thermometer 53, a pressure gauge 54 and a second water inlet valve 521 along the water flow direction, and the fourth water inlet valve 131 is provided between the second water inlet valve 521 and the second water inlet end 13; the first water outlet end 12 is connected to the first water outlet valve 121 by a pipe, and the third water outlet valve 122 is provided between the first water outlet valve 121 and the first water outlet end 12 One end of the third water outlet valve 122 is connected to the first water outlet valve 121 and the first water outlet end 12, and the other end of the third water outlet valve 122 is used to connect to the wastewater tank; the other end of the first water outlet valve 121 is connected to the biochemical pool 3, and the first water outlet end 12 is sequentially provided with a pressure gauge 54 and a thermometer 53 along the water flow direction, and the pressure gauge 54 and the thermometer 53 are arranged between the first water outlet valve 121 and the biochemical pool 3; the second water outlet end 14 is connected to the second water outlet valve 141 by a pipeline, and the fourth water outlet valve 142 is arranged between the second water outlet valve 141 and the second water outlet end 14, one end of the fourth water outlet valve 142 is connected to the second water outlet valve 141 and the second water outlet end 14, and the other end of the fourth water outlet valve 142 is used to connect to the wastewater tank; the second water outlet valve 141 is sequentially provided with a pressure gauge 54 and a thermometer 53 along the water flow direction.

[0031] In summary, open the first water inlet valve 511, the first water outlet valve 121, the second water inlet valve 521 and the second water outlet valve 141, and close other valves. The heat medium in the biochemical pool 3 enters the plate heat exchanger 1 from the first water inlet end 11 through the hot water pump 51 and the first water inlet valve 511, and the cooling water in the cooling tower 4 enters the plate heat exchanger 1 from the second water inlet end 13 through the cold water pump 52 and the second water inlet valve 521. After heat exchange in the plate heat exchanger 1, the heat medium flows back from the first water outlet end 12 through the first water outlet valve 121 to the biochemical pool 3 for further degradation; when the pressure difference between the inlet and outlet ends of the plate heat exchanger 1 exceeds the allowable pressure difference, the heat exchange is suspended, and at this time, the cleaning operation is started; use a steel hose to connect the cleaning water tank 21, the cleaning pump 22 and the third water inlet valve 111 Connect, open the third water inlet valve 111 and the third water outlet valve 122, close other valves, and the cleaning pump 22 will flow the cleaning agent in the cleaning water tank 21 into the plate heat exchanger 1 through the third water inlet valve 111 and the first water inlet end 11. The cleaning agent rinses one side of the plate heat exchanger 1 and flows out from the first water outlet end 12 through the third water outlet valve 122 to the wastewater tank; similarly, connect the steel wire hose to the fourth water inlet valve 131, open the fourth water inlet valve 131 and the fourth water outlet valve 142, and close other valves. The cleaning agent flows from the second water inlet end 13 through the fourth water inlet valve 131 into the plate heat exchanger 1, and rinses the other side of the plate heat exchanger 1. The waste liquid flows from the second water outlet end 14 through the fourth water outlet valve 142 to the wastewater tank, completing the cleaning of the plate heat exchanger 1.

[0032] The various devices selected in this application are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0033] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An online cleaning device for a landfill leachate plate heat exchanger, characterized in that: include: A plate heat exchanger (1) and a cleaning assembly (2), wherein the plate heat exchanger (1) and the cleaning assembly (2) are connected by a pipeline; The cleaning assembly (2) comprises a cleaning water tank (21) and a cleaning pump (22), wherein the cleaning water tank (21) is connected to the input end of the cleaning pump (22) via a steel hose, and the output end of the cleaning pump (22) is connected to the plate heat exchanger (1) via the steel hose; A first water inlet (11) and a first water outlet (12) are provided on one side of the plate heat exchanger (1), and the first water inlet (11) and the first water outlet (12) are respectively provided at two ends of the plate heat exchanger (1); a second water inlet (13) and a second water outlet (14) are provided on the other side of the plate heat exchanger (1), and the second water inlet (13) and the second water outlet (14) are respectively provided at two ends of the plate heat exchanger (1); The pipe on one side of the plate heat exchanger (1) close to the first water inlet end (11) is connected to a third water inlet valve (111), and the pipe on one side of the plate heat exchanger (1) close to the first water outlet end (12) is connected to a third water outlet valve (122); the pipe on one side of the plate heat exchanger (1) close to the second water inlet end (13) is connected to a fourth water inlet valve (131), and the pipe on one side of the plate heat exchanger (1) close to the second water outlet end (14) is connected to a fourth water outlet valve (142).

2. The on-line cleaning device for a landfill leachate plate heat exchanger according to claim 1, characterized in that: The first water inlet end (11) is connected to the biochemical pool (3) through a pipeline. The third water inlet valve (111) is provided between the plate heat exchanger (1) and the biochemical pool (3). One end of the third water inlet valve (111) is connected to the plate heat exchanger (1) and the biochemical pool (3). The other end of the third water inlet valve (111) is used to connect to the cleaning water tank (21).

3. The on-line cleaning device for a landfill leachate plate heat exchanger according to claim 2, characterized in that: The second water inlet end (13) is connected to a cooling tower (4) through a pipeline. The fourth water inlet valve (131) is provided between the plate heat exchanger (1) and the cooling tower (4). One end of the fourth water inlet valve (131) is connected to the plate heat exchanger (1) and the cooling tower (4), and the other end of the fourth water inlet valve (131) is connected to the cleaning water tank (21).

4. The on-line cleaning device for a landfill leachate plate heat exchanger according to claim 3, characterized in that: The pipes on both sides of the plate heat exchanger (1) are connected to a heat exchange assembly (5), and the heat exchange assembly (5) comprises a hot water pump (51), a first water inlet valve (511), a cold water pump (52), a second water inlet valve (521), a plurality of thermometers (53), and a plurality of pressure gauges (54).

5. The on-line cleaning device for a landfill leachate plate heat exchanger according to claim 4, characterized in that: The biochemical pool (3) is provided with the hot water pump (51), the thermometer (53), the pressure gauge (54) and the first water inlet valve (511) in sequence along the water flow direction, and the third water inlet valve (111) is provided between the first water inlet valve (511) and the first water inlet end (11).

6. The on-line cleaning device for a landfill leachate plate heat exchanger according to claim 4, characterized in that: The cooling tower (4) is provided with the cold water pump (52), the thermometer (53), the pressure gauge (54) and the second water inlet valve (521) in sequence along the water flow direction, and the fourth water inlet valve (131) is provided between the second water inlet valve (521) and the second water inlet end (13).

7. The on-line cleaning device for a landfill leachate plate heat exchanger according to claim 4, characterized in that: The first water outlet end (12) is connected to a first water outlet valve (121) through a pipeline, and the third water outlet valve (122) is provided between the first water outlet valve (121) and the first water outlet end (12). One end of the third water outlet valve (122) is connected to the first water outlet valve (121) and the first water outlet end (12), and the other end of the third water outlet valve (122) is used for connecting to a wastewater tank.

8. The on-line cleaning device for a landfill leachate plate heat exchanger according to claim 7, characterized in that: The other end of the first water outlet valve (121) is in communication with the biochemical pool (3), and the pressure gauge (54) and the thermometer (53) are sequentially arranged at the first water outlet end (12) along the water flow direction. The pressure gauge (54) and the thermometer (53) are arranged between the first water outlet valve (121) and the biochemical pool (3).

9. The on-line cleaning device for a landfill leachate plate heat exchanger according to claim 4, characterized in that: The second water outlet end (14) is connected to a second water outlet valve (141) through a pipeline, and the fourth water outlet valve (142) is provided between the second water outlet valve (141) and the second water outlet end (14). One end of the fourth water outlet valve (142) is connected to the second water outlet valve (141) and the second water outlet end (14), and the other end of the fourth water outlet valve (142) is used to connect to a wastewater tank. The second water outlet valve (141) is provided with the pressure gauge (54) and the thermometer (53) in sequence along the water flow direction.

10. The on-line cleaning device for a landfill leachate plate heat exchanger according to claim 1, characterized in that: The cleaning agent is placed inside the cleaning water tank (21), and a plurality of universal wheels are installed at the bottom end of the cleaning water tank (21); the steel wire hose is connected to the cleaning water tank (21) and the cleaning pump (22) respectively through flange joints.

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