CN211752927U - Internal backwash system for laminated filter - Google Patents

Abstract

The utility model relates to an endogenous backwash system of lamination filter, including producing water pipe and backwash pipe, parallel connection multiunit essence is strained the control assembly between producing water pipe and backwash pipe, and the essence is strained the control assembly and is included first valve, lamination filter unit and the three-way valve of establishing ties, and each essence is strained the three-way valve of control assembly and still is passed through pipeline and inlet tube intercommunication jointly, still passes through pipeline and backwash pump's export intercommunication on the inlet tube, and backwash pump's import intercommunication backwash water tank still sets up the backwash valve on backwash pump and water piping connection's pipeline. The utility model discloses an increase backwash pump and backwash water tank, save the system of the extra backwash pipeline of traditional external source backwash and control flap, need not to increase investment cost and take up an area of to ultrafiltration and reverse osmosis system, reduce the cost and the down time of technical improvement, because backwash pressure does not receive water processing system's restriction, under the big rivers scouring of high pressure, the backwash is effectual, and can add chemical reagent and promote greatly the ability of getting rid of biomembrane and scale deposit.

Description

Internal backwash system for laminated filter

technical field

The utility model relates to the field of water treatment equipment, in particular to an internal source backwashing system of a laminated filter.

Background technique

As a fine filtration equipment, the laminated filter is easily contaminated by microorganisms. Algae and bacteria will accumulate in the filter holes between the laminations and secrete mucus to block the filter holes. In order to solve the above problems, the online external source backwashing or self-sourced backwashing method has been developed, but the above-mentioned backwashing methods all have the following problems:

(1) External backwashing uses a backwashing pump to achieve backwashing, but external backwashing requires additional backwashing pumps, backwashing water tanks, backwashing pipelines and an extra set of backwashing control valves, so the equipment investment is high, accounting for The land area is large.

(2) The pressure and flow of the backwash from the source are not enough to thoroughly clean the laminations. It is necessary to disassemble the module and take out the laminations for manual cleaning, which requires the water treatment equipment to be shut down for a long time, which seriously affects the safety of water supply.

(3) The internal backwashing structure is simple, the equipment investment is less, and the land occupation is small, but the backwashing pressure and flow are limited by the system pressure, which may cause incomplete and uneven washing.

Utility model content

In view of the above existing problems, the applicant has carried out research and improvement to provide an internal source backwashing system for a laminated filter, which does not require increased investment costs and land occupation, and does not require artificial input of ozone by using the utility model and the system. Save water.

The technical scheme adopted by the utility model is as follows:

The internal source backwashing system of the laminated filter includes a water production pipe and a backwashing pipe. Between the water production pipe and the backwashing pipe, multiple sets of fine filtration control assemblies are connected in parallel, and the fine filtration control assembly includes a series-connected first valve. , laminated filter unit and three-way valve, the three-way valve of each fine filter control assembly is also communicated with the water inlet pipe through the pipeline, and the water inlet pipe is also connected with the outlet of the backwash pump through the pipeline. The inlet of the washing pump is connected to the backwashing water tank, a backwashing valve is also set on the pipeline connecting the backwashing pump and the water inlet pipe, a water production valve and an exhaust valve are also set on the water production pipe, and a water production valve and an exhaust valve are also arranged on the water inlet pipe. A water inlet valve is also arranged, and a blowdown valve is also arranged on the backwashing pipe.

The beneficial effects of the present utility model are as follows:

By adding a backwashing pump and a backwashing water tank, the utility model omits the traditional external backwashing extra backwashing pipeline and control valve system, does not need to increase investment cost and land occupation for ultrafiltration and reverse osmosis systems, and reduces the cost of technical transformation. Cost and downtime, because the backwashing pressure is not limited by the water treatment system, the backwashing effect is good under the high pressure and large water flow, and the removal capacity of biofilm and scaling can be greatly improved by adding chemical reagents.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

Among them: 1. Fine filter control assembly; 101, first valve; 102, laminated filter unit; 103, three-way valve; 2, water production valve; 3, exhaust valve; 4, water production pipe; 5, backwash pipe; 6, water inlet pipe; 7, backwash water tank; 8, backwash pump; 9, backwash valve; 10, water inlet valve; 11, drain valve.

Detailed ways

Specific embodiments of the present invention will be described below.

As shown in Figure 1, the internal source backwash system of the laminated filter includes a water production pipe 4 and a backwash pipe 5. Between the water production pipe 4 and the backwash pipe 5, multiple sets of fine filtration control components 1 are connected in parallel. The fine filtration control components 1 includes the first valve 101, the laminated filter unit 102 and the three-way valve 103 connected in series. The three-way valve 103 of each fine filter control assembly 1 is also communicated with the water inlet pipe 6 through the pipeline, and the water inlet pipe 6 also passes through the pipe. The road is connected to the outlet of the backwash pump 8, the inlet of the backwash pump 8 is connected to the backwash water tank 7, a backwash valve 9 is also set on the pipeline connecting the backwash pump 8 and the water inlet pipe 6, and a production water pipe 4 is also set. The water valve 2 and the exhaust valve 3 are also provided with a water inlet valve 10 on the water inlet pipe 6, and a drain valve 11 is also provided on the backwash pipe 5. The backwash pump 8 is a corrosion-resistant centrifugal pump.

As shown in FIG. 1 , the daily water production process of the present utility model is as follows: the backwash valve 9 is closed, the backwash pump 8 is stopped, the water inlet valve 10 is opened, each three-way valve 103 points to the water inlet, and the inlet water is filtered by each lamination. After the filter unit 102 filters out the large suspended solids, each first valve 101 is opened at this time, so that the produced water is discharged from the water production valve 2, and the exhaust valve 3 can automatically discharge the free gas in the system. The inlet water pressure is 2.5-3 kg, the production water pressure is about 2.5 kg, and the pressure difference between the front and rear ends of the laminated filter unit 102 is 0.1-0.5 kg. When it reaches 0.5 kg, it will automatically start backwashing.

The process of backwashing by the internal source backwashing system of the laminated filter is as follows:

Close the production line, close the water inlet valve 10 and the water production valve 2, and add sodium hypochlorite, sodium hydroxide or hydrochloric acid to the backwash water tank to adjust to the required concentration and temperature. Turn on the backwash pump 8, the backwash valve 9 and the blowdown valve 11, and adjust the backwash pressure to 4-5 kg as required. The automatic backwash procedure is started. As shown in FIG. 1 , when there is one laminated filter unit 102 performing backwashing, the other two laminated filter units 102 keep producing water normally. In the unit 102, the flow direction of the three-way valve 103 connected to the laminated filter unit 102 is communicated with the backwash pipe 5, and is discharged through the blowdown valve 11. Since the water inlet is cut off, the pressure at the output end of the first valve 101 is high ( 2.5 kg), the pressure at the discharge end is low (0 kg), so the water flow changes direction and flows from the water production end to the sewage end, thereby realizing backwashing. After the backwashing is completed, the three-way valve 103 connected to the laminated filter unit 102 is re-directed to the water inlet pipe 6, so that the laminated filter unit 102 can return to the water production process. The backwashing process of the other laminated filter units 102 is the same as the above. The steps are the same. When all the lamination filter units have been backwashed, turn off the backwash pump, make the laminations in the lamination filter unit soak for 5-6 hours under pressure and then turn on the backwash pump, and repeat the third step again.

Close the backwash pump 8 and the backwash valve 9, and discharge the residual backwash water. Open the production line, open the water inlet valve 10 and the water production valve 2.

The above-mentioned backwashing only needs to be shut down when the laminated filter unit 102 is seriously polluted. When the pollution is not serious, the production line does not need to be shut down. It is only necessary to replace the three-way valve 103 under the laminated filter unit 102 that needs to be cleaned. It is connected to the backwashing pipe 5 to make the water flow from the water production end to the sewage end to realize backwashing.

By adding a backwashing pump and a backwashing water tank, the utility model omits the traditional external backwashing extra backwashing pipeline and control valve system, does not need to increase investment cost and land occupation for ultrafiltration and reverse osmosis systems, and reduces the cost of technical transformation. Cost and downtime, because the backwashing pressure is not limited by the water treatment system, the backwashing effect is good under the high pressure and large water flow, and the removal capacity of biofilm and scaling can be greatly improved by adding chemical reagents.

The above description is an explanation of the present utility model, not a limitation of the utility model. For the limited scope of the present utility model, refer to the claims. The present utility model can be modified in any form without violating the basic structure of the present utility model.

Claims (1)

1. Endogenous backwash system of lamination filter which characterized in that: comprises a water production pipe (4) and a back flushing pipe (5), a plurality of groups of fine filtration control components (1) are connected in parallel between the water production pipe (4) and the back flushing pipe (5), the fine filtration control assembly (1) comprises a first valve (101), a lamination filter unit (102) and a three-way valve (103) which are connected in series, the three-way valve (103) of each fine filtration control assembly (1) is also communicated with the water inlet pipe (6) through a pipeline, the water inlet pipe (6) is also communicated with the outlet of the backwashing pump (8) through a pipeline, the inlet of the backwashing pump (8) is communicated with the backwashing water tank (7), a back washing valve (9) is also arranged on a pipeline connecting the back washing pump (8) and the water inlet pipe (6), a water production valve (2) and an exhaust valve (3) are also arranged on the water production pipe (4), a water inlet valve (10) is further arranged on the water inlet pipe (6), and a blowdown valve (11) is further arranged on the backwashing pipe (5).

Images