Online chemical cleaning device for leachate conveying pipeline

Abstract

The utility model discloses an online chemical cleaning device for a percolate conveying pipeline, which comprises the percolate conveying pipeline, a running inlet valve is arranged at the inlet end of the percolate conveying pipeline, a running outlet valve is arranged at the outlet end of the percolate conveying pipeline, and the tail section of the percolate conveying pipeline is connected with a cleaning box through a return pipe; an outlet of the cleaning box is connected with a cleaning centrifugal pump, the cleaning centrifugal pump is connected with the head section of the leachate conveying pipeline through an outlet pipe, a cleaning inlet valve is arranged at the end, close to the leachate conveying pipeline, of the outlet pipe, and a cleaning outlet valve is arranged at the end, close to the leachate conveying pipeline, of the backflow pipe. The on-line chemical cleaning device can be used for regularly carrying out on-line chemical cleaning on the percolate conveying pipeline by using cleaning liquid, is simple in structure and easy to operate, can greatly shorten the maintenance time, reduces the descaling maintenance cost of the percolate conveying pipeline, and simultaneously prolongs the service life of the pipeline.

Description

TECHNICAL FIELD

[0001] The present application relates to leachate treatment system technical field, especially to a kind of on-line chemical cleaning device of leachate conveying pipeline. BACKGROUND

[0002] In the leachate treatment process, due to its process characteristics, water pump and pipeline are usually used to transport leachate to each treatment system, and the conveying pipeline is an indispensable fluid conveying carrier in the leachate treatment process. In actual production process, on the one hand, due to the characteristics of leachate, such as high ammonia nitrogen content, high organic pollutant concentration, high salt content, complex composition, large fluctuation range of water quality and quantity, on the other hand, affected by external temperature, pipeline flow rate and other factors, leachate conveying pipeline is prone to scale formation, such as containing a large amount of calcium, magnesium and other ions in leachate. These ions are prone to scale formation in the pipeline after pH, temperature and other changes. When the leachate pipeline is scaled, the pipeline conveying flow is reduced, which affects the production load and the service life of the pipeline.

[0003] The existing leachate conveying pipeline is usually disassembled into 2-3 meters per section after being blocked. After the pipeline is disassembled, manual knocking and descaling are carried out using iron hammer, metal rod and other tools. This method has low descaling efficiency, and may seriously affect production. In addition, the leachate flowing out of the pipeline during disassembly may also pollute the ground and produce odor, affecting the production site environment. Another measure is to replace the whole pipeline by purchasing the original model pipeline. This method has the disadvantages of long pipeline replacement time and high overall procurement cost. Therefore, the present application provides an on-line chemical cleaning device for leachate conveying pipeline. CONTENT OF THE PRESENT INVENTION

[0004] The present application provides an on-line chemical cleaning device for leachate conveying pipeline, which can periodically use cleaning liquid to carry out on-line chemical cleaning of leachate conveying pipeline. The device has simple structure and easy operation, can greatly shorten the maintenance time, reduce the maintenance cost and prolong the service life of the pipeline.

[0005] Therefore, the present application provides an on-line chemical cleaning device for leachate conveying pipeline, which includes a leachate conveying pipeline.

[0006] An operating inlet valve is arranged at the inlet end of the leachate conveying pipeline.

[0007] An operating outlet valve is arranged at the outlet end of the leachate conveying pipeline.

[0008] A cleaning tank is connected to the tail section of the leachate conveying pipeline through a backflow pipe.

[0009] A cleaning centrifugal pump is connected to the outlet of the cleaning tank.

[0010] The cleaning centrifugal pump is connected with the first section of the leachate conveying pipeline through an outlet pipe;

[0011] The outlet pipe is provided with a cleaning inlet valve near one end of the leachate conveying pipeline;

[0012] The return pipe is provided with a cleaning outlet valve near one end of the leachate conveying pipeline.

[0013] Optionally, the leachate conveying pipeline is provided with a first connecting end and a second connecting end;

[0014] The first connecting end and the second connecting end are both located between the running inlet valve and the running outlet valve;

[0015] The first connecting end is located near the running outlet valve;

[0016] The second connecting end is located near the running inlet valve;

[0017] One end of the return pipe is connected with the first connecting end, and the other end is connected with the inlet of the cleaning tank;

[0018] One end of the outlet pipe is connected with the second connecting end, and the other end is connected with the outlet of the cleaning centrifugal pump.

[0019] Optionally, the outlet of the cleaning tank is connected with the cleaning centrifugal pump through an inlet pipe.

[0020] Optionally, the inlet of the cleaning centrifugal pump is provided with a cleaning pump inlet valve;

[0021] The outlet of the cleaning centrifugal pump is provided with a cleaning pump outlet valve.

[0022] Optionally, the return pipe is provided with a pH detection device.

[0023] Optionally, the cleaning tank is provided with a tap water supplement inlet;

[0024] The tap water supplement inlet is provided with a tap water supplement valve.

[0025] Optionally, the bottom of the cleaning tank is provided with a drain outlet;

[0026] The drain outlet is provided with an emptying valve.

[0027] Optionally, the cleaning tank is provided with a cleaning liquid.

[0028] Optionally, the inlet end of the leachate conveying pipeline is further provided with a pressure sensor.

[0029] Optionally, the outlet end of the leachate conveying pipeline is further provided with a flow meter.

[0030] From the above technical solutions, the present application has the following advantages: the leachate conveying pipeline online chemical cleaning device can periodically use cleaning liquid to perform online chemical cleaning on the leachate conveying pipeline by adding the online chemical cleaning device on the leachate conveying pipeline, has simple structure, easy operation, can greatly shorten the maintenance time, reduce the leachate conveying pipeline descaling maintenance cost, and prolong the pipeline service life. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A use schematic view of the leachate conveying pipeline online chemical cleaning device in the present application embodiment;

[0032] In the drawings, the reference signs are as follows:

[0033] 1 - running inlet valve, 2 - running outlet valve, 3 - cleaning outlet valve, 4 - cleaning inlet valve, 5 - cleaning centrifugal pump, 6 - cleaning pump outlet valve, 7 - cleaning pump inlet valve, 8 - cleaning tank, 9 - outlet pipe, 10 - leachate conveying pipeline, 11 - backflow pipe, 12 - emptying valve, 13 - inlet pipe, 14 - pH detection device, 15 - tap water replenishment valve. DETAILED DESCRIPTION

[0034] In order to enable personnel in the art to better understand the present application, the technical solutions in the present application will be described clearly and completely in conjunction with the drawings in the present application embodiment. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] Unless otherwise defined, the terms "mounting", "connected", "connecting" are to be construed as broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0037] The present application provides an embodiment of an online chemical cleaning device for leachate conveying pipeline, please refer to Figure 1 .

[0038] The online chemical cleaning device for leachate conveying pipeline in the embodiment comprises a leachate conveying pipeline 10, a running inlet valve 1 is arranged at an inlet end of the leachate conveying pipeline 10, a running outlet valve 2 is arranged at an outlet end of the leachate conveying pipeline 10, a cleaning tank 8 is connected to a tail section of the leachate conveying pipeline 10 through a backflow pipe 11, an outlet of the cleaning tank 8 is connected to a cleaning centrifugal pump 5, the cleaning centrifugal pump 5 is connected to a head section of the leachate conveying pipeline 10 through an outlet pipe 9, a cleaning inlet valve 4 is arranged at one end of the outlet pipe 9 close to the leachate conveying pipeline 10, and a cleaning outlet valve 3 is arranged at one end of the backflow pipe 11 close to the leachate conveying pipeline 10.

[0039] It should be noted that the online chemical cleaning device for leachate conveying pipeline can periodically use cleaning liquid to perform online chemical cleaning on the leachate conveying pipeline 10 by adding the online chemical cleaning device on the leachate conveying pipeline 10, the structure is simple, the operation is simple, the maintenance time can be greatly shortened, the descaling maintenance cost of the leachate conveying pipeline 10 is reduced, and the service life of the pipeline is prolonged.

[0040] The above is an embodiment one of the online chemical cleaning device for leachate conveying pipeline provided by the embodiment of the present application, and the following is an embodiment two of the online chemical cleaning device for leachate conveying pipeline provided by the embodiment of the present application, please refer to Figure 1 .

[0041] The online chemical cleaning device for leachate conveying pipeline in the embodiment comprises a leachate conveying pipeline 10, a running inlet valve 1 is arranged at an inlet end of the leachate conveying pipeline 10, a running outlet valve 2 is arranged at an outlet end of the leachate conveying pipeline 10, a cleaning tank 8 is connected to a tail section of the leachate conveying pipeline 10 through a backflow pipe 11, an outlet of the cleaning tank 8 is connected to a cleaning centrifugal pump 5, the cleaning centrifugal pump 5 is connected to a head section of the leachate conveying pipeline 10 through an outlet pipe 9, a cleaning inlet valve 4 is arranged at one end of the outlet pipe 9 close to the leachate conveying pipeline 10, and a cleaning outlet valve 3 is arranged at one end of the backflow pipe 11 close to the leachate conveying pipeline 10.

[0042] Specifically, the leachate conveying pipeline 10 is provided with a first connecting end and a second connecting end, both of which are located between the running inlet valve 1 and the running outlet valve 2, the first connecting end is arranged close to the running outlet valve 2, and the second connecting end is arranged close to the running inlet valve 1; one end of the backflow pipe 11 is connected with the first connecting end, and the other end is connected with the inlet of the cleaning tank 8; one end of the outlet pipe 9 is connected with the second connecting end, and the other end is connected with the outlet of the cleaning centrifugal pump 5.

[0043] The outlet of the cleaning tank 8 is connected with the cleaning centrifugal pump 5 through the inlet pipe 13.

[0044] The inlet of the cleaning centrifugal pump 5 is provided with a cleaning pump inlet valve 7, and the outlet of the cleaning centrifugal pump 5 is provided with a cleaning pump outlet valve 6.

[0045] The backflow pipe 11 is provided with a pH detection device 14.

[0046] The cleaning tank 8 is provided with a tap water supplementing opening, and the tap water supplementing opening is provided with a tap water supplementing valve 15.

[0047] The bottom of the cleaning tank 8 is provided with a drainage opening, and the drainage opening is provided with an emptying valve 12.

[0048] The cleaning tank 8 is provided with cleaning liquid.

[0049] The inlet end of the leachate conveying pipeline 10 can also be provided with a pressure sensor, and the pressure of the inlet end of the leachate conveying pipeline 10 is detected through the pressure sensor, so as to determine whether the leachate conveying pipeline 10 needs to be cleaned (when it is found that the pressure of the inlet end of the leachate conveying pipeline 10 is increased, it means that scaling occurs in the leachate conveying pipeline 10).

[0050] The outlet end of the leachate conveying pipeline 10 can also be provided with a flow meter, and the flow of the leachate at the outlet end of the leachate conveying pipeline 10 is detected through the flow meter, so as to determine whether the leachate conveying pipeline 10 needs to be cleaned (when it is found that the flow of the leachate is reduced, it means that scaling occurs in the leachate conveying pipeline 10).

[0051] In specific implementation, during normal operation, the leachate of the previous system flows into the leachate conveying pipeline 10 through the running inlet valve 1, and then flows into the next treatment system through the running outlet valve 2; during the operation, when it is found that the flow of the leachate at the outlet end of the leachate conveying pipeline 10 is reduced and / or the pressure of the inlet end of the leachate conveying pipeline 10 is increased, the online chemical cleaning is started. It can be understood that after the online chemical cleaning device is installed, a maintenance cleaning can also be performed on the pipeline periodically (every two months).

[0052] The specific cleaning steps are as follows:

[0053] Valve operation: when the pipeline is found to be blocked or regular online chemical cleaning is taken, the running inlet valve 1 and the running outlet valve 2 are closed, and the cleaning inlet valve 4, the cleaning outlet valve 3, the cleaning pump inlet valve 7 and the cleaning pump outlet valve 6 are opened.

[0054] Configuration of cleaning solution: the cleaning solution is configured in the cleaning tank 8, the volume of the cleaning tank 8 is 3 times the total volume of the pipeline, and the formula is: 50 kg of citric acid, and 31% industrial hydrochloric acid is added to adjust the pH value of the cleaning solution to 2-3 (the data of the pH value is crucial, and the pH value of the cleaning solution must be between 2-3).

[0055] Circulating cleaning I: after the cleaning solution is configured, the cleaning centrifugal pump 5 is started to transport the cleaning solution, the cleaning solution enters the cleaning centrifugal pump 5 through the inlet pipe 13 and the cleaning pump inlet valve 7, and is thrown into the cleaning pump outlet valve 6 under the action of centrifugal force, and then is transported to the leachate conveying pipeline 10 through the outlet pipe 9 and the cleaning inlet valve 4. Since the running inlet valve 1 and the running outlet valve 2 are in the closed state, the cleaning solution will flow back to the cleaning tank 8 through the cleaning outlet valve 3 and the backflow pipe 11. When the value detected by the pH detection device 14 is between 2-3, the operation of the cleaning centrifugal pump 5 is stopped, and the cleaning solution is allowed to soak in the leachate conveying pipeline 10.

[0056] Soaking: the cleaning solution is soaked in the leachate conveying pipeline 10 for 2 hours, and no operation is performed during this period.

[0057] Circulating cleaning II: after 2 hours of soaking, the cleaning centrifugal pump 5 is restarted to operate, and the pipeline is subjected to circulating cleaning according to the process of "circulating cleaning I". During this period, the value of the cleaning solution is detected by the pH detection device 14. When the pH detection device 14 detects that the pH value of the cleaning solution is constant at 2-3, the cleaning is completed. When the pH value of the cleaning solution is greater than 2-3, 31% industrial hydrochloric acid is added to adjust the pH value to between 2-3, and the circulating cleaning and soaking are continued until the circulating cleaning pH value is constant at 2-3, and the cleaning is completed.

[0058] Flushing: the emptying valve 12 at the bottom of the cleaning tank 8 is opened, the cleaning solution is recovered to the system for treatment, then the tap water replenishment valve 15 is opened, the liquid level of the cleaning tank 8 is replenished to 2 / 3, the cleaning centrifugal pump 5 is started to flush the pipeline, and when the pH detection device 14 detects that the pH value of the flushing liquid is between 6-7, the flushing is stopped, the running inlet valve 1 and the running outlet valve 2 are opened, and the cleaning inlet valve 4, the cleaning outlet valve 3, the cleaning pump inlet valve 7 and the cleaning pump outlet valve 6 are closed, then the pipeline operation is restored, and the step of the maintenance chemical cleaning is completed.

[0059] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An apparatus for on-line chemical cleaning of leachate transport pipes, characterized in that The utility model relates to a leachate conveying pipeline for leachate treatment system, which comprises: a leachate conveying pipeline; an operating inlet valve arranged at an inlet end of the leachate conveying pipeline; an operating outlet valve arranged at an outlet end of the leachate conveying pipeline; a cleaning tank connected to a tail section of the leachate conveying pipeline through a backflow pipe; a cleaning centrifugal pump connected to an outlet of the cleaning tank; the cleaning centrifugal pump connected to a head section of the leachate conveying pipeline through an outlet pipe; a cleaning inlet valve arranged at one end of the outlet pipe close to the leachate conveying pipeline; a cleaning outlet valve arranged at one end of the backflow pipe close to the leachate conveying pipeline.

2. The on-line chemical cleaning device for leachate transfer pipes according to claim 1, characterized in that, The leachate conveying pipeline is provided with a first connecting end and a second connecting end; the first connecting end and the second connecting end are both located between the operating inlet valve and the operating outlet valve; the first connecting end is arranged close to the operating outlet valve; the second connecting end is arranged close to the operating inlet valve; one end of the backflow pipe is connected to the first connecting end, and the other end is connected to an inlet of the cleaning tank; one end of the outlet pipe is connected to the second connecting end, and the other end is connected to an outlet of the cleaning centrifugal pump.

3. The on-line chemical cleaning apparatus for leachate transfer piping according to claim 1, characterized by, The outlet of the cleaning tank is connected to the cleaning centrifugal pump through an inlet pipe.

4. The on-line chemical cleaning apparatus for leachate transfer piping according to claim 1, characterized by, A cleaning pump inlet valve is arranged at an inlet of the cleaning centrifugal pump; a cleaning pump outlet valve is arranged at an outlet of the cleaning centrifugal pump.

5. The on-line chemical cleaning apparatus for leachate transfer piping according to claim 1, characterized by, A pH detection device is arranged on the backflow pipe.

6. The on-line chemical cleaning apparatus for leachate transfer piping according to claim 1, characterized by, A tap water supplementing port is arranged on the cleaning tank; a tap water supplementing valve is arranged at the tap water supplementing port.

7. The on-line chemical cleaning apparatus for leachate transfer piping according to claim 1, characterized by, A drain port is arranged at the bottom of the cleaning tank; an emptying valve is arranged at the drain port.

8. The on-line chemical cleaning apparatus for leachate transfer piping according to claim 1, characterized by, Cleaning liquid is arranged in the cleaning tank.

9. The on-line chemical cleaning apparatus for leachate transfer piping according to claim 1, characterized by, A pressure sensor is further arranged at the inlet end of the leachate conveying pipeline.

10. The on-line chemical cleaning apparatus for leachate transfer piping according to claim 1, characterized by, A flow meter is further arranged at the outlet end of the leachate conveying pipeline.

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