Ultrafiltration, flushing and cleaning integrated device

Abstract

The utility model belongs to the technical field of landfill leachate treatment, and particularly relates to an ultrafiltration, flushing and cleaning integrated device. A water adding pipe, a chemical adding pipe, a produced water inlet pipe used for receiving produced water of an ultrafiltration device, a concentrated water return pipe used for receiving concentrated water of the ultrafiltration device and a delivery pump are connected to a water storage tank of the ultrafiltration, flushing and cleaning integrated device, wherein the water outlet end of the delivery pump is connected with a flushing and cleaning water inlet pipe communicated with the ultrafiltration device; the ultrafiltration device can be flushed through the cooperation of the produced water inlet pipe, the delivery pump and the flushing and cleaning water inlet pipe, and the ultrafiltration device can be cleaned through the cooperation of the water adding pipe, the chemical adding pipe, the produced water inlet pipe, the concentrated water return pipe and the delivery pump; in other words, the ultrafiltration, flushing and cleaning integrated device disclosed by the utility model has the functions of ultrafiltration, flushing and cleaning at the same time, so that the number and idleness of equipment are reduced, and the occupied area of the equipment is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of landfill leachate treatment, and particularly relates to an integrated ultrafiltration flushing and cleaning device. Background Art

[0002] Small landfill leachate refers to the comprehensive and complex wastewater generated by domestic waste through extraction, hydrolysis and fermentation during stacking and disposal. It is small in scale and low in output, and has the characteristics of high ammonia nitrogen concentration, high organic pollutant concentration, high SS and high salt. At present, the conventional process for small leachate adopts "pretreatment system + anaerobic system + biochemical system + external tubular ultrafiltration membrane system + nanofiltration system + reverse osmosis system".

[0003] Since the treatment scale of the small landfill leachate system is ≤ 100 t / d, considering the investment and operation costs, usually a set of external tubular ultrafiltration membrane system is selected. Most of the external tubular ultrafiltration membrane systems have an ultrafiltration flushing pump and an ultrafiltration cleaning pump respectively arranged beside the ultrafiltration product water tank and the ultrafiltration cleaning tank to avoid the situation that the two ultrafiltration membranes in the leachate station are respectively flushed and cleaned at the same time, resulting in the situation that the ultrafiltration membrane tubes are not flushed in time and the membrane tubes are blocked. The external ultrafiltration membrane system is generally designed according to a single line. Since the flushing device and the cleaning device of a single ultrafiltration system do not operate at the same time, and the cleaning device is used about once every 1 - 2 months, the usage frequency is relatively low.

[0004] Therefore, the separate design of the ultrafiltration flushing device and the cleaning device not only occupies a large area of equipment, but also causes the equipment to be idle. Content of the Utility Model

[0005] The purpose of the utility model is to provide an integrated ultrafiltration flushing and cleaning device to solve the technical problems in the prior art that the ultrafiltration flushing device and the cleaning device are separately designed, which not only occupies a large area of equipment, but also causes the equipment to be idle.

[0006] The present application provides an integrated ultrafiltration flushing and cleaning device, which includes:

[0007] A water storage tank, which is provided with a water inlet pipe and a medicine adding pipe, and a drain valve is arranged at its bottom;

[0008] A product water inlet pipe communicated with the water storage tank, which is used for receiving the product water of the ultrafiltration device;

[0009] A concentrated water return pipe communicated with the water storage tank, which is used for receiving the concentrated water of the ultrafiltration device;

[0010] A delivery pump, whose water inlet end is communicated with the water storage tank, and the water outlet end is connected with the flushing and cleaning inlet pipe communicating with the ultrafiltration device.

[0011] In an embodiment of the present application, the water outlet end of the delivery pump is also communicated with the water storage tank through a cleaning return pipe.

[0012] In an embodiment of the present application, a water production inlet valve is provided on the water production inlet pipe;

[0013] A pump inlet valve is provided at the inlet end of the delivery pump, and a flushing and cleaning inlet valve is provided on the pipe section between the outlet end and the ultrafiltration device.

[0014] In an embodiment of the present application, a concentrated water return valve is provided on the concentrated water return pipe;

[0015] A water addition valve is provided on the water addition pipe;

[0016] A chemical addition valve is provided on the chemical addition pipe.

[0017] In an embodiment of the present application, the integrated ultrafiltration flushing and cleaning device further includes a control module;

[0018] The water production inlet valve, the concentrated water return valve, the water addition valve, the flushing and cleaning inlet valve, the chemical addition valve, and the delivery pump are all electrically connected to the control module.

[0019] In an embodiment of the present application, a liquid level gauge electrically connected to the control module is further provided on the water storage tank.

[0020] In an embodiment of the present application, a cleaning return valve is provided on the cleaning return pipe.

[0021] The beneficial effects of the present utility model are as follows: A water addition pipe, a chemical addition pipe, a water production inlet pipe for receiving the produced water of the ultrafiltration device, a concentrated water return pipe for receiving the concentrated water of the ultrafiltration device, and a delivery pump are connected to the water storage tank of the integrated ultrafiltration flushing and cleaning device of the present utility model. The outlet end of the delivery pump is connected to the flushing and cleaning inlet pipe communicating with the ultrafiltration device; the ultrafiltration device can be flushed through the cooperation of the water production inlet pipe, the delivery pump, and the flushing and cleaning inlet pipe, and the ultrafiltration device can be cleaned through the cooperation of the water addition pipe, the chemical addition pipe, the water production inlet pipe, the concentrated water return pipe, and the delivery pump; in other words, the integrated ultrafiltration flushing and cleaning device of the present utility model simultaneously has the functions of ultrafiltration flushing and cleaning, reduces the number of devices and device idleness, and reduces the floor area occupied by the devices.

[0022] Other features and advantages of the present utility model will be described in the following description, and, in part, will be obvious from the description, or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the description and the drawings.

[0023] To make the above objectives, features, and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given in conjunction with the accompanying drawings and described in detail as follows. Brief Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of an integrated ultrafiltration flushing and cleaning device of a preferred embodiment of the present utility model.

[0026] In the figure:

[0027] Water storage tank 1, water adding pipe 101, chemical adding pipe 102, product water inlet pipe 103, concentrated water return pipe 104, cleaning return pipe 105, flushing and cleaning inlet pipe 106, transfer pump 2, concentrated water return valve 3, water adding valve 4, product water inlet valve 5, pump inlet valve 6, flushing and cleaning inlet valve 7, cleaning return valve 8, drain valve 9, chemical adding valve 10, liquid level gauge 11, receiving ultrafiltration device 200. Detailed Description of the Embodiments

[0028] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0029] Professional Terms and Glossary:

[0030] Small-scale landfill leachate: It refers to the secondary pollutants generated during the stacking and disposal of garbage through extraction, hydrolysis, and fermentation, with a scale ≤ 100 t / d, mainly sourced from the internal water content of the garbage itself and the wastewater generated by the biochemical reaction of the garbage.

[0031] External tubular ultrafiltration membrane: It refers to an integrated device that replaces the traditional secondary sedimentation tank. Through a mixed liquor circulation pump, the treated water is discharged externally after passing through the membrane module, and the microorganisms are completely retained in the biochemical system through the retention effect of the ultrafiltration membrane.

[0032] Ultrafiltration flushing: During the use of the ultrafiltration membrane, it will be affected by various pollutants, resulting in problems such as decreased flux, reduced rejection rate, and degraded performance. Ultrafiltration flushing refers to using physical forces such as water flow or air flow to scour or vibrate the surface or inside of the ultrafiltration membrane, so that the pollutants are peeled off or washed away from the ultrafiltration membrane.

[0033] Ultrafiltration cleaning: It refers to using chemical agents such as acids, alkalis, or redox agents to dissolve or oxidize the pollutants on the ultrafiltration membrane, so that they are separated from the ultrafiltration membrane. The purpose is to remove or reduce the pollutants on the ultrafiltration membrane, restore or improve the flux and rejection rate of the ultrafiltration membrane, and extend the service life of the ultrafiltration membrane.

[0034] This application provides an integrated ultrafiltration flushing and cleaning device, which will be described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of this application. And in the following embodiments, each embodiment has its own focus. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0035] Please refer to Figure 1 , in an embodiment of this application, the integrated ultrafiltration flushing and cleaning device includes: a water storage tank 1, which is provided with a water inlet pipe 101 and a chemical dosing pipe 102, and a drain valve 9 is arranged at its bottom; a product water inlet pipe 103 communicated with the water storage tank 1, which is used to receive the product water of the ultrafiltration device 200; a concentrated water return pipe 104 communicated with the water storage tank 1, which is used to receive the concentrated water of the ultrafiltration device 200; a delivery pump 2, whose water inlet end is communicated with the water storage tank 1, and the water outlet end is connected to the flushing and cleaning inlet pipe 106 communicating with the ultrafiltration device 200.

[0036] In this embodiment, in order to adjust the cleaning flow rate, the water outlet end of the delivery pump 2 is also communicated with the water storage tank 1 through a cleaning return pipe 105; during cleaning, part of the cleaning water flows into the ultrafiltration device 200 from the flushing and cleaning inlet pipe 106, and part of the cleaning water can flow back into the water storage tank 1 through the cleaning return pipe 105, which can be adjusted as needed.

[0037] Furthermore, a product water inlet valve 5 is arranged on the product water inlet pipe 103, which can control the opening and closing of the product water inlet pipe 103; in addition, a pump inlet valve 6 is arranged at the water inlet end of the delivery pump 2, and a flushing and cleaning inlet valve 7 is arranged on the pipe section between the water outlet end and the ultrafiltration device 200.

[0038] Furthermore, a concentrated water return valve 3 is arranged on the concentrated water return pipe 104; a water inlet valve 4 is arranged on the water inlet pipe 101; a chemical dosing valve 10 is arranged on the chemical dosing pipe 102.

[0039] Furthermore, a cleaning return valve 8 is arranged on the cleaning return pipe 105.

[0040] In this embodiment, optionally, the water inlet pipe 101 can be connected to the municipal tap water pipe network; the chemical dosing pipe 102 can be connected to a chemical dosing device.

[0041] In this embodiment, optionally, control valves such as the concentrated water reflux valve 3, the water addition valve 4, the product water inlet valve 5, the pump inlet valve 6, the flushing and cleaning water inlet valve 7, the cleaning reflux valve 8, the drain valve 9, and the chemical dosing valve 10 can be electric, pneumatic, or manual valves.

[0042] In some embodiments, specifically, the concentrated water reflux valve 3, the water addition valve 4, the product water inlet valve 5, the flushing and cleaning water inlet valve 7, and the chemical dosing valve 10 can be pneumatic valves, and the pump inlet valve 6, the cleaning reflux valve 8, and the drain valve 9 can be manual valves.

[0043] In this embodiment, in order to achieve automatic control, optionally, the ultrafiltration flushing and cleaning integrated device further includes a control module; the product water inlet valve 5, the concentrated water reflux valve 3, the water addition valve 4, the flushing and cleaning water inlet valve 7, the chemical dosing valve 10, and the transfer pump 2 are all electrically connected to the control module.

[0044] Furthermore, a liquid level gauge 11 electrically connected to the control module is also provided on the water storage tank 1.

[0045] In this embodiment, the control module can be a PLC; the control module can control the opening and closing of the corresponding valves and the start and stop of the transfer pump 2 according to the liquid level height of the water storage tank 1 detected by the liquid level gauge 11.

[0046] In a specific application scenario, the working process of the ultrafiltration flushing and cleaning integrated device is as follows:

[0047] When the ultrafiltration device is operating normally, the ultrafiltration flushing and cleaning integrated device does not operate, belonging to a static state with no water flow.

[0048] Ultrafiltration flushing process:

[0049] When the ultrafiltration device needs to be flushed, first open the pump inlet valve 6 and the product water inlet valve 5. The product water of the ultrafiltration device flows from the ultrafiltration device to the water storage tank 1 through the product water inlet pipe 103, and the liquid level gauge 11 can detect the liquid level in the water storage tank 1;

[0050] When the liquid level in the water storage tank 1 reaches the required level, the transfer pump 2 operates, and the flushing and cleaning water inlet valve 7 opens to perform ultrafiltration flushing on the ultrafiltration device; during ultrafiltration flushing, the membrane product water of the ultrafiltration device still flows from the ultrafiltration device to the water storage tank 1 through the product water inlet pipe 103, and the membrane concentrated water of the ultrafiltration device enters the front-end system of leachate treatment through concentrated water reflux;

[0051] After 60 s of ultrafiltration flushing of the ultrafiltration device, the ultrafiltration flushing ends. The transfer pump 2, the product water inlet valve 5, the flushing and cleaning water inlet valve 7, and the pump inlet valve 6 are closed, and the drain valve 9 is opened. The sewage in the water storage tank 1 can be discharged to the trench to complete the ultrafiltration flushing process.

[0052] Ultrafiltration cleaning process:

[0053] When the ultrafiltration device needs to be cleaned, open the pump inlet valve 6 and the water filling valve 4. Tap water flows into the water storage tank 1 through the water filling pipe 101, and the liquid level gauge 11 can detect the liquid level in the water storage tank 1;

[0054] After the liquid level in the water storage tank 1 reaches the required level, close the water filling valve 4, open the transfer pump 2, the concentrated water reflux valve 3, the product water inlet valve 5, the flushing and cleaning inlet valve 7, and the chemical dosing valve 10. The cleaning reflux valve 8 can be opened or closed according to the flow rate requirement during cleaning; when the ultrafiltration device is being cleaned, the membrane product water flows into the water storage tank 1 through the product water inlet pipe 103, and the membrane concentrated water flows into the water storage tank 1 through the concentrated water reflux pipe 104;

[0055] After 2 minutes of ultrafiltration cleaning, end the ultrafiltration cleaning, close the transfer pump 2, the concentrated water reflux valve 3, the product water inlet valve 5, the flushing and cleaning inlet valve 7, the chemical dosing valve 10, and the pump inlet valve 6, open the drain valve 9, and the sewage in the water storage tank 1 can be discharged to the trench to complete the ultrafiltration cleaning process.

[0056] In summary, in view of the small scale of small - scale landfill leachate, the ultrafiltration flushing and cleaning integrated device of the present utility model adopts a single - line design for the external ultrafiltration membrane system, and there will be no situation where ultrafiltration flushing and cleaning occur simultaneously. The ultrafiltration flushing and cleaning functions are integrated into one device; with the same functional effects, the number of required devices of this device is small. For example, one ultrafiltration flushing pump and one ultrafiltration flushing pump water diversion tank can be reduced, while reducing the equipment occupation space, the civil engineering foundation project quantity, and the installation project quantity; it is convenient for automatic control, and can perform fully automatic ultrafiltration flushing and cleaning, reducing the daily operation and inspection of the ultrafiltration system operators.

[0057] Each device (components without specific structures described) selected in this application is a general standard component or a component known to those skilled in the art, and its structure and principle can be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0058] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" shall 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0059] Inspired by the above-described ideal embodiments of the present utility model, through the above description, relevant staff can fully make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An integrated device for ultrafiltration rinsing and cleaning, characterized in that, Comprising: A water storage tank (1) with a water filling pipe (101) and a chemical adding pipe (102), and a drain valve (9) is arranged at its bottom; A product water inlet pipe (103) communicated with the water storage tank (1) for receiving the product water of the ultrafiltration device (200); A concentrated water return pipe (104) communicated with the water storage tank (1) for receiving the concentrated water of the ultrafiltration device (200); A transfer pump (2), whose water inlet end is communicated with the water storage tank (1), and the water outlet end is connected to a flushing and cleaning inlet pipe (106) communicating with the ultrafiltration device (200).

2. The integrated ultrafiltration flushing and cleaning device according to claim 1, wherein The water outlet end of the transfer pump (2) is also communicated with the water storage tank (1) through a cleaning return pipe (105).

3. The integrated ultrafiltration flushing and cleaning device according to claim 1, wherein A product water inlet valve (5) is arranged on the product water inlet pipe (103); A pump inlet valve (6) is arranged at the water inlet end of the transfer pump (2), and a flushing and cleaning inlet valve (7) is arranged on the pipe section between the water outlet end and the ultrafiltration device (200).

4. The integrated ultrafiltration flushing and cleaning device according to claim 3, wherein A concentrated water return valve (3) is arranged on the concentrated water return pipe (104); A water filling valve (4) is arranged on the water filling pipe (101); A chemical adding valve (10) is arranged on the chemical adding pipe (102).

5. The integrated ultrafiltration flushing and cleaning device according to claim 4, wherein The integrated ultrafiltration flushing and cleaning device further comprises a control module; The product water inlet valve (5), the concentrated water return valve (3), the water filling valve (4), the flushing and cleaning inlet valve (7), the chemical adding valve (10), and the transfer pump (2) are all electrically connected to the control module.

6. The integrated ultrafiltration flushing and cleaning device according to claim 5, wherein A liquid level gauge (11) electrically connected to the control module is further arranged on the water storage tank (1).

7. The integrated ultrafiltration flushing and cleaning device according to claim 2, wherein A cleaning return valve (8) is arranged on the cleaning return pipe (105).

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