CN211570182U - Immersed ultrafiltration membrane water purification system - Google Patents

Abstract

The utility model discloses an submergence formula milipore filter water purification system. The utility model discloses a raw water tank is through the tube coupling self-cleaning filter of installation intake pump, and the raw water entry of self-cleaning filter below the intake pipe connection ultrafiltration membrane core pressure vessel through setting gradually inlet valve and intake pressure table, the delivery port of ultrafiltration membrane core pressure vessel top is through setting gradually the product water pipe connection product water tank of producing water manometer, product water flowmeter and product water valve. General submergence formula milipore filter filtration system unit area design flux is on the low side than continuous membrane filtration technology, the utility model discloses can be totally according to continuous membrane filtration technology flux design, general flux can improve 1/3 flux than prior art.

Description

Submerged ultrafiltration membrane water purification system

technical field

The utility model relates to the field of small-scale water purification, in particular to a novel submerged ultrafiltration membrane water purification system.

Background technique

In the fields of municipal water supply, industrial water, seawater desalination, surface water, groundwater and other small-scale purification and drinking, the submerged ultrafiltration membrane filtration system needs to design civil structures as filtration membrane pools, which greatly increases the investment cost and land occupation of the project.

The original technology submerged ultrafiltration membrane equipment completes the membrane filtration process through negative pressure suction of a centrifugal pump. During the process, the submerged ultrafiltration membrane equipment is immersed in the membrane tank, and the water surface level is higher than the membrane equipment to filter. The original technology can only use the negative pressure suction of centrifugal pump to complete the membrane filtration process, and requires a lot of work such as civil construction of membrane pools.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a submerged ultrafiltration membrane water purification system.

The utility model of the immersed ultrafiltration membrane water purification system is realized by the following technical solutions: the raw water tank is connected to the self-cleaning filter through the pipeline installed with the water inlet pump, and the self-cleaning filter is provided with the water inlet valve and the water inlet pressure gauge in turn. The water inlet pipeline is connected to the raw water inlet under the pressure vessel of the ultrafiltration membrane core, and the water outlet above the pressure vessel of the ultrafiltration membrane core is connected to the water production tank through the water production pipeline which is provided with a water production pressure gauge, a water production flowmeter and a water production valve in sequence;

The air storage tank is connected to the aeration port under the pressure vessel of the ultrafiltration membrane core through the air path provided with the intake valve, and the exhaust port at the top of the pressure vessel of the ultrafiltration membrane core is connected to the return line provided with the upper exhaust valve. The discharge port at the bottom of the pressure vessel is connected to the drainage pipeline provided with the lower discharge valve; the return pipeline is connected to the raw water tank through the return branch provided with a return pressure gauge, a return valve and a return flow meter;

Below the backwash tank is connected the production water pipeline through the backwash pipeline with the backwash pump, the backwash pressure gauge, the backwash flowmeter and the backwash valve in sequence; Can;

The cleaning pump is respectively connected to the cleaning tank and the dosing pipeline provided with the cleaning drug inlet valve. The dosing pipeline is connected to the water inlet pipeline and enters the cleaning water of the membrane module. The return line is connected to the cleaning branch with a cleaning return valve. The cleaning tank is connected to the cleaning tank through a pipeline provided with a product water return valve.

The hollow fiber ultrafiltration membrane core is installed in the ultrafiltration membrane core pressure vessel and is sealed with the ultrafiltration membrane core pressure container through the sealing ring of the hollow fiber ultrafiltration membrane core core. It consists of an upper cover and a supporting mechanism. The main body of the pressure vessel is provided with a sealing and fixing structure with the hollow fiber ultrafiltration membrane filter element, a water production pipeline, a water inlet pipeline, an upper drain pipeline, a lower drain pipeline, an exhaust system, an air distribution system, and a filter. As the main body of the pressure vessel, the cartridge is provided with a supporting mechanism at the bottom and a removable upper cover at the upper end. The upper cover is connected and fixed by bolts and nuts, the bottom of the filter cartridge is provided with a water inlet pipe, which communicates with the inside of the filter cartridge; the bottom of the filter cartridge is provided with a lower drain pipe, which communicates with the inside of the filter cartridge; There is an upper discharge pipe at the upper end of the side; the water production pipe is arranged on the side of the filter cartridge near the upper end, and the water production pipe is guided by the pipeline inside the filter element; the lower part of the filter cartridge is provided with an air distribution system, which is detachable The top of the upper cover is provided with an exhaust system, and the gas in the container needs to be discharged during the positive flushing process of the entire device during operation.

Compared with the prior art, the beneficial effects of the present utility model are:

In the prior art, the submerged hollow fiber ultrafiltration membrane module needs to be designed with a centrifugal pump negative pressure suction to complete the membrane filtration process during the application process, and the submerged hollow fiber ultrafiltration membrane core involved in the present invention is provided by designing a centrifugal pump. The positive pressure drives the pressure and acts on the pressure vessel to complete the membrane filtration process.

1. The present utility model is different from the existing submerged ultrafiltration membrane filtration technology. The existing submerged ultrafiltration membrane filtration technology uses centrifugal pump negative pressure suction to complete the membrane filtration process, and the present utility model can use centrifugal pump positive pressure to complete the membrane. Filtration process, while existing surface water or groundwater as drinking water are equipped with booster pump or remote delivery pump, the utility model can also be completed by using the pressure provided by the existing booster pump or remote delivery pump without a centrifugal pump membrane filtration process.

2. The prior art treatment of surface water or groundwater as drinking water generally adopts submerged ultrafiltration membrane filtration technology, and submerged membrane filtration technology needs to carry out soil structures as membrane pools, and the utility model is to insert submerged ultrafiltration membranes into special The pressure vessel is used as a membrane tank to complete the membrane filtration process, eliminating the need for civil engineering design and construction of the original technology.

3. Generally, the design flux per unit area of the submerged ultrafiltration membrane filtration system is lower than that of the continuous membrane filtration technology. The present utility model can be completely designed according to the continuous membrane filtration technology flux, and the general flux can be increased by 1/3 compared with the prior art. quantity.

Description of drawings

Figure 1 is a schematic diagram of the principle of the present invention.

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings and specific 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.

As shown in Figure 1, the raw water tank is connected to the self-cleaning filter through the pipeline installed with the water inlet pump, and the self-cleaning filter is connected to the pressure vessel under the ultrafiltration membrane core through the water inlet pipeline where the water inlet valve 1 and the water inlet pressure gauge are arranged in turn. The raw water inlet and the water outlet above the pressure vessel of the ultrafiltration membrane core are connected to the production water tank through the production water pipeline which is provided with the produced water pressure gauge, the produced water flowmeter and the water production valve in turn;

The air storage tank is connected to the aeration port under the filter membrane pressure vessel through the air path provided with the intake valve 6, and the exhaust port at the top of the filter membrane pressure vessel is connected to the return line provided with the upper discharge valve. The discharge port at the bottom is connected to the drainage pipeline provided with the lower discharge valve; the return pipeline is connected to the raw water tank through the return branch provided with a return pressure gauge, a return valve and a return flow meter;

Below the backwash tank is connected the production water pipeline through the backwash pipeline with the backwash pump, the backwash pressure gauge, the backwash flowmeter and the backwash valve in sequence; Can;

The cleaning pump is respectively connected to the cleaning tank and the dosing pipeline provided with the cleaning drug inlet valve. The dosing pipeline is connected to the water inlet pipeline and enters the cleaning water of the membrane module. The return line is provided with a cleaning return valve 10 to clean the branch. The cleaning tank is connected, and the water production pipeline is connected to the cleaning tank through the pipeline provided with the produced water return valve 11 .

The purification process of this system is described in detail below:

1. Water making:

First open the upper drain valve 7, then open the water inlet valve 1, and then turn on the inlet water pump. After filling the membrane system with water, close the upper drain valve 7, open the backwashing water supply valve 3 and the return valve 4, and a small part of the raw water Return to the raw water tank through the return valve, and most of the product water is injected into the backwash tank. When the backwash tank is full, open the product water valve 2, close the backwash water replenishment valve 3, and transport the product water to the product water tank. The membrane system is cross-flow filtration (closing the return valve 4 is full-flow filtration).

According to the quality of raw water, set a reasonable water production time. In this state, according to the requirements of raw water quality or product water quality, the oxidizing bactericide can be directly added to the membrane filtration raw solution system from the dosing point II through the metering pump.

2. Air scrubbing:

After the water making cycle is over, enter the gas scrubbing stage, first close the inlet water pump, then close the water inlet valve 1, and then close the return valve 4 and the water production valve 2. After that, open the upper exhaust valve 7 first, and then open the intake valve 6 to let the compressed air enter the membrane module.

When the compressed air is introduced, the membrane filaments oscillate due to the action of the updraft, so that the membrane filaments rub and collide with each other, so that the contaminants attached to the membrane filament wall are peeled off.

3. Gas-water backwash

After the gas scrubbing is completed, it enters the gas-water backwashing stage. The upper discharge valve 7 and the intake valve 6 are kept open, then the backwash valve 5 is opened, and then the backwash pump is started to allow the backwash water and compressed air to enter the membrane module, and adjust the reasonable backwash water flow (the backwash pump is The frequency conversion pump is realized by adjusting the operating frequency of the backwash pump), and the reasonable gas flow and cleaning time are controlled.

When the compressed air is introduced, the membrane filaments oscillate due to the action of the updraft, so that the membrane filaments rub and collide with each other, so that the contaminants attached to the membrane filament wall are peeled off. At this time, the purpose of backwashing water is to loosen the deposits on the membrane surface and keep the membrane module filled with liquid, so as to maximize the effect of air oscillation.

4. Sewage

After air-water backwashing, the system empties the membrane module, first close the backwash pump, then close the backwash valve 5 and the intake valve 6, keep the upper discharge valve 7 open and the lower discharge valve 8 open, and connect the membrane module to the membrane device pipe. The concentrated sewage remaining in the road is discharged.

Another advantage of the lower row is that it can play the role of scouring and entrainment through the instantaneous large flow of the lower row.

5. Maintenance chemical cleaning

Maintenance chemical cleaning is to clean the membrane module after a certain degree of pollution, and the performance of the membrane module will be greatly restored after cleaning.

Maintenance chemical cleaning CEB (using backwash channel):

① Before cleaning, try to clean the membrane module by physical backwashing, open the upper row valve 7 and the lower row valve 8, and close the valve after emptying the entire membrane system.

② First open the upper discharge valve 7 and the backwash valve 5, then turn on the backwash pump, and at the same time, inject the appropriate amount of chemicals required for cleaning through the metering pump at the dosing point I, so that the cleaning chemicals and backwash water penetrate the inside of the membrane wire At the same time, it enters the membrane module, and the gas is discharged from the membrane module through the upper discharge valve 7. After filling the membrane module, first close the backwash pump, then close the backwash valve 5 and the upper discharge valve 7. Soak the membrane module for an appropriate time.

③ After soaking, carry out the steps of air scrubbing and air water washing, then open the upper exhaust valve 7 and the lower exhaust valve 8, and after emptying the entire membrane system, close the valve and the cleaning is over.

Maintenance chemical cleaning EFM: (using the cleaning channel)

① Before cleaning, try to clean the membrane module by physical backwashing, open the upper row valve 7 and the lower row valve 8, and close the valve after emptying the entire membrane system.

② The cleaning tank is filled with an appropriate amount of water, first open the cleaning water inlet valve 9, then open the cleaning return valve 10 and the product water return valve 11, and finally turn on the cleaning pump, and at the same time, the metering pump at the dosing point II is used for cleaning. The cleaning agent and the cleaning water enter the membrane shell at the same time, and the cleaning water entering the membrane module, part of which is returned to the cleaning tank through the cleaning return valve 10, and part of which is returned to the cleaning tank through the membrane wire through the product water return valve 11. The tank is cleaned to form a cross-flow cycle.

③Close the cleaning pump and valve to soak the entire membrane system for an appropriate time.

④ After soaking, carry out the steps of air scrubbing and air-water washing, and then open the upper exhaust valve 7 and the lower exhaust valve 8. After emptying the entire membrane system, close the valve and the cleaning is over.

6. Stop

Shutdown/Maintenance Shutdown Instructions

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principles of the present invention. Improvement and modification should also be regarded as the protection scope of the present invention.

Claims (2)

1. An immersed ultrafiltration membrane water purification system is characterized in that a raw water tank is connected with a self-cleaning filter through a pipeline provided with a water inlet pump, the self-cleaning filter is connected with a raw water inlet below an ultrafiltration membrane core pressure vessel through a water inlet pipeline sequentially provided with a water inlet valve and a water inlet pressure gauge, and a water outlet above the ultrafiltration membrane core pressure vessel is connected with a water production tank through a water production pipeline sequentially provided with a water production pressure gauge, a water production flow meter and a water production valve;

the air storage tank is connected with an aeration port below the ultrafiltration membrane core pressure container through an air passage provided with an air inlet valve, an air outlet at the top of the ultrafiltration membrane core pressure container is connected with a return pipeline provided with an upper discharge valve, and a discharge port at the bottom of the ultrafiltration membrane core pressure container is connected with a drain pipeline provided with a lower discharge valve; the return pipeline is connected with the raw water tank through a return branch provided with a return pressure gauge, a return valve and a return flowmeter;

a backwashing pipeline which is sequentially provided with a backwashing pump, a backwashing pressure gauge, a backwashing flow meter and a backwashing valve is connected with a water production pipeline below the backwashing tank; the water production pipeline is connected with a backwashing tank through a pipeline provided with a backwashing water replenishing valve;

the cleaning pump is respectively connected with the cleaning tank and a dosing pipeline provided with a cleaning medicine inlet valve, the dosing pipeline is connected with the water inlet pipeline and enters cleaning water of the membrane assembly, the return pipeline is connected with the cleaning tank through a cleaning return valve cleaning branch, and the water production pipeline is connected with the cleaning tank through a water production return valve pipeline.

2. The immersed ultrafiltration membrane water purification system as claimed in claim 1, wherein the hollow fiber ultrafiltration membrane core is installed in an ultrafiltration membrane core pressure vessel and sealed with the ultrafiltration membrane core pressure vessel through a sealing ring of the hollow fiber ultrafiltration membrane core, the ultrafiltration membrane core pressure vessel body is composed of a filter cartridge, a detachable upper cover and a support mechanism, a sealing and fixing structure, a water production pipeline, a water inlet pipeline, an upper discharge pipeline, a lower discharge pipeline, an exhaust system and an air distribution system are arranged in the pressure vessel body, the filter cartridge is used as the pressure vessel body, the bottom of the pressure vessel body is provided with the support mechanism, the upper end of the pressure vessel body is provided with the detachable upper cover, the sealing ring is arranged between the filter cartridge and the detachable upper cover to ensure the sealing property in the vessel, the filter cartridge and the detachable upper cover are connected and fixed through bolts and nuts, the bottom of, the water inlet pipeline is communicated with the interior of the filter cylinder; the bottom of the filter cylinder is provided with a lower row of pipelines which are communicated with the inside of the filter cylinder; an upper row of pipelines are arranged at the position close to the upper end of the side part of the filter cylinder; a water production pipeline is arranged at the position close to the upper end of the side part of the filter cylinder and is guided by a pipeline in the filter core; the lower part of the filter cylinder is provided with an air distribution system, the top of the detachable upper cover is provided with an exhaust system, and the positive flushing link of the whole device in the operation process needs to discharge the air in the container.

Images