CN201776088U - Flat membrane cleaning system - Google Patents

Abstract

A flat membrane cleaning system relates to a cleaning system for a sewage treatment device, in particular to a flat membrane cleaning system for a sewage treatment device. The utility model consists of a clean water tank, a U-shaped aeration pipe, water production, The clean water tank is located in the upper part of the system, and there is a cleaning water inlet at the bottom, which is connected with the production water and the cleaning pipeline through pipe fittings to form a circulation loop. The loop is equipped with a cleaning valve and a water inlet valve, and U-shaped aeration The tube is located in the lower part outside the flat membrane. The utility model simplifies the operation of the whole cleaning process, makes the appearance and layout of the equipment more reasonable and beautiful, prolongs the service life of the flat membrane, and ensures the water production and water quality of the equipment.

Description

A flat membrane cleaning system

technical field

The utility model relates to a cleaning system for a sewage treatment device, in particular to a cleaning system for a flat membrane of a sewage treatment device. the

technical background

MBR-membrane technology sewage processor is an intelligent treatment device integrating sewage treatment and reclaimed water reuse. The main feature of this equipment is the perfect combination of activated sludge method and membrane technology, and membrane modules replace the traditional sewage biological treatment process. The secondary sedimentation tank, under the high-efficiency retention of the membrane module, completely separates the mud and water; due to the high-concentration activated sludge in the membrane filtration area, the biochemical reaction rate is improved, the excess sludge production is reduced, and the traditional sewage is solved. Biological treatment processes generally have outstanding problems such as unstable effluent quality, large footprint, complex operation and maintenance, and prone to sludge bulking. the

MBR is a high-efficiency water treatment system developed by introducing membrane separation technology into the wastewater biological treatment system and utilizing the respective advantages of membrane separation technology and biological reaction technology. It has the advantages of small footprint, high solid-liquid separation rate, high activated sludge concentration, high treatment efficiency, good effluent quality, low sludge yield, and simple operation and management. However, it also has some problems that need to be solved, such as relatively high equipment cost, relatively easy pollution of the membrane, and short service life of the membrane. the

Contents of the invention

The purpose of the utility model is to overcome the defects of the prior art, and provide a flat membrane cleaning system with small footprint, good cleaning effect and simple maintenance. the

The flat membrane cleaning system described in the utility model is mainly composed of a clean water tank, a U-shaped aeration pipe, water production and cleaning pipelines. 1. The cleaning pipeline is connected to form a circular loop. The loop is equipped with a cleaning valve and a water inlet valve. The U-shaped aeration tube is located at the lower part of the flat membrane. the

In the flat membrane cleaning system described in the utility model, a cleaning water inlet is connected to the bottom of the clean water tank, and an overflow port, a water outlet and an air inlet are arranged in the clean water tank. The distance from the liquid level of the cleaning solution in the clean water tank to the membrane water collection pipe is less than 100cm. A produced water pump is connected to the produced water and cleaning pipelines. A flow meter, a sterilizer and a water meter are connected on the pipeline between the produced water, the cleaning pipeline and the water inlet of the clean water tank. the

The utility model is mainly composed of three parts: a clean water tank that can also be used as a cleaning tank, water production, cleaning pipelines and a U-shaped aeration tube installed at the bottom of the flat membrane. Using the clean water tank on the upper part of the equipment, a cleaning water inlet is added at the bottom , use the pipe fittings to short-circuit the water production pipeline to form a circulation loop to form a complete water production and cleaning pipeline system; and set a cleaning valve and a water inlet valve on the circuit; through the opening or closing of the cleaning and water inlet valves , to realize the two functions of controlling water production and cleaning the flat membrane filter membrane respectively; the outside of the flat membrane is washed through the U-shaped aeration tube arranged at the lower part. After the improvement of the pipeline, the clean water tank has both the functions of the dosing tank and the cleaning tank, and the water production and cleaning pipelines are combined into one, realizing the regular cleaning of the polluted flat membrane. If the degree of pollution is high, you can choose to add chemicals to clean or wash directly with water. The utility model simplifies the operation of the whole cleaning process, makes the appearance and layout of the equipment more reasonable and beautiful, prolongs the service life of the flat membrane, and ensures the water production and water quality of the equipment. the

Description of drawings

Figure 1 is a structural schematic diagram of the utility model flat membrane cleaning system. the

Fig. 2 is a structural schematic diagram of the utility model flat membrane cleaning system. the

In the figure, 1-product water pump, 2-water inlet valve, 3-cleaning valve, 4-overflow port, 5-clean water tank, 6-product water and cleaning pipeline, 7-flat membrane, 8-U type exposure Air pipe, 9-flow meter, 10-sterilizer, 11-water meter, 12-clean water tank water inlet, 13-air inlet, 14-membrane water collection pipe, 15-water outlet. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described further, but not limited to embodiment. the

Example 1

As shown in Figure 1 and Figure 2, the SINAP (SINAP) flat membrane 7 is placed vertically in the aerobic reaction tank, the activated sludge mixture passes through the protective membrane, is filtered through the filter membrane, and passes through the produced water and the cleaning pipe Road 6 is sucked out from the flat film member 7 by the produced water pump 1, and enters the clean water tank 5 through the sterilizer 10, the flow meter 9, the water meter 11, and flows out from the water outlet 15 through the overflow port 4. Because the structure of SINAP flat plate membrane is different from that of hollow fiber membrane, the outer surface of the filter membrane is protected by a layer of protective film, the outside can bear a large scouring force, but the inside cannot withstand a large scouring force, otherwise the filter membrane and the outside will be damaged. The protective membrane, causing the filter membrane to directly contact with the activated sludge mixture. At the same time, under the action of the gas scouring force of the U aeration pipe 8, it is very easy to cause damage and damage to the filter membrane, and eventually the flat membrane is scrapped, and the filtering effect cannot be realized, which directly affects the operation of the entire equipment. the

In order to avoid damage to the filter membrane of the flat membrane element 7 due to excessive cleaning water pressure; it is required to strictly control the distance from the cleaning liquid level in the clean water tank 5 to the membrane water collection pipe 14 within 100 cm, preferably about 80 cm, otherwise the filter membrane will be damaged. cause injury and damage. In order to meet the cleaning requirements of the filter membrane, we designed the clean water tank 5 to be placed on the top of the equipment room. Using the weight of the water in the tank, it flows freely from the bottom and slowly enters the filter membrane of the flat membrane element 7, from the inside to the outside. The filter membrane is washed, and the outer surface of the flat membrane is washed by the U-shaped aeration tube 8 at the bottom of the flat membrane 7, so that the surface dirt enters the membrane pool, and after sedimentation, it is discharged from the sewage pipeline to complete the entire cleaning process of the flat membrane. . The clean water tank 5 bottom is connected with a clean water tank water inlet 12, and an overflow port 4, a water outlet 15, and an air inlet 13 are arranged in the clean water tank. the

The cleaning cycle of the filter membrane depends on the degree of pollution of the filter membrane. Generally, the cleaning cycle of domestic sewage is once every 5 to 6 months. At the beginning of cleaning, first stop the production water pump 1 and close the water inlet valve 2; when the membrane pollution is serious, add the cleaning agent into the clean water tank 5, ventilate and stir, so that the cleaning agent and clean water are evenly mixed; When it is relatively light, it is not necessary to add cleaning agent and stir without ventilation; open the cleaning valve 3, so that the water in the clean water tank 5 will automatically and slowly flow into the flat membrane 7, and rinse from the inside to the outside. The type aeration pipe 8 is ventilated to wash and clean, so that the dirt seeping out of the surface of the flat membrane 7 enters the membrane tank, and is discharged from the sewage pipeline after sedimentation. After all the water in the clean water tank is emptied; close the cleaning valve 3, open the water inlet valve 2, start the water production pump 1, restore the flat membrane filtration function, and the equipment enters the normal working state to complete the entire cleaning process. the

Through cleaning, the cleanliness and service life of the flat membrane are greatly improved, the water production volume and water quality of the equipment are ensured, and the economic effect is maximized. the

Claims (6)

1. A flat membrane cleaning system, consisting of clean water tank, U-shaped aeration pipe, water production and cleaning pipeline, is characterized in that the clean water tank is located at the top of the system, and there is a cleaning water inlet at its bottom, through pipe fittings and production water The water and cleaning pipelines are connected to form a circulation loop. The loop is equipped with a cleaning valve and a water inlet valve. The U-shaped aeration tube is located at the lower part of the flat membrane. 2. The flat membrane cleaning system according to claim 1, characterized in that, the bottom of the clean water tank is connected with a cleaning water inlet, and the clean water tank is provided with an overflow port, a water outlet and an air inlet. 3. The flat membrane cleaning system according to claim 1, characterized in that the distance from the liquid level of the cleaning solution in the clean water tank to the membrane water collection pipe is less than 100cm. 4. The flat membrane cleaning system according to claim 3, characterized in that the distance from the liquid level of the cleaning solution in the clean water tank to the membrane water collection pipe is 80cm. 5. The flat membrane cleaning system according to claim 1, characterized in that a water production pump is connected to the water production and cleaning pipelines. 6. The flat membrane cleaning system according to claim 2, characterized in that a flow meter, a sterilizer and a water meter are connected on the pipeline between the water production, the cleaning pipeline and the water inlet of the clean water tank.

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