CN110975383A - Endogenous backwashing system and process of laminated filter - Google Patents
Endogenous backwashing system and process of laminated filter Download PDFInfo
- Publication number
- CN110975383A CN110975383A CN201911357073.5A CN201911357073A CN110975383A CN 110975383 A CN110975383 A CN 110975383A CN 201911357073 A CN201911357073 A CN 201911357073A CN 110975383 A CN110975383 A CN 110975383A
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- CN
- China
- Prior art keywords
- backwashing
- valve
- water
- pipe
- pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011001 backwashing Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 claims abstract description 37
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 238000011010 flushing procedure Methods 0.000 claims abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000003475 lamination Methods 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001223 reverse osmosis Methods 0.000 abstract description 3
- 238000000108 ultra-filtration Methods 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 210000003097 mucus Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
- B01D29/46—Edge filtering elements, i.e. using contiguous impervious surfaces of flat, stacked bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/92—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
- B01D37/025—Precoating the filter medium; Addition of filter aids to the liquid being filtered additives incorporated in the filter
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Abstract
The invention relates to an endogenous backwashing system of a laminated filter, which comprises a water production pipe and a backwashing pipe, wherein a plurality of groups of fine filtration control components are connected between the water production pipe and the backwashing pipe in parallel, each fine filtration control component comprises a first valve, a laminated filter unit and a three-way valve which are connected in series, the three-way valves of the fine filtration control components are also communicated with a water inlet pipe through a pipeline together, the water inlet pipe is also communicated with the outlet of a backwashing pump through a pipeline, the inlet of the backwashing pump is communicated with a backwashing water tank, and a backwashing valve is also arranged on the pipeline connecting the backwashing pump and the water inlet pipe. The process of the invention omits a system of an extra backwashing pipeline and a control valve of the traditional external backwashing by adding the backwashing pump and the backwashing water tank, does not need to increase investment cost and occupation area aiming at an ultrafiltration and reverse osmosis system, reduces the cost of technical improvement and the downtime, has good backwashing effect under the high-pressure and large-water-flow flushing because the backwashing pressure is not limited by a water treatment system, and can greatly improve the capacity of removing the biomembrane and the scale by adding a chemical reagent.
Description
Technical Field
The invention relates to the field of water treatment equipment, in particular to a laminated filter internal source backwashing system and a process thereof.
Background
The laminated filter used as a fine filtering device is easily polluted by microorganisms, algae and bacteria can be accumulated in the filtering holes between the laminated sheets and secrete mucus to block the filtering holes. The invention provides an online exogenous backwashing or self-sourced backwashing mode for solving the problems, but the backwashing mode has the following problems:
the external source back washing utilizes a back washing pump to realize back washing, but the external source back washing needs to additionally increase a back washing pump, a back washing water tank, a back washing pipeline and a set of back washing control valves, so the equipment investment is higher, and the occupied area is larger.
And (II) the pressure and flow of self-source backwashing are not enough to thoroughly clean the lamination, and the module needs to be disassembled and the lamination needs to be taken out for manual cleaning, so that the water treatment equipment needs to be stopped for a long time, and the water supply safety is seriously influenced.
And (III) the internal source backwashing structure is simple, the equipment investment is less, the occupied area is small, but the backwashing pressure and the flow are limited by the system pressure, and the phenomena of incomplete and uneven flushing are possible to occur.
Disclosure of Invention
The applicant researches and improves aiming at the existing problems, and provides an endogenous backwashing system of a laminated filter and a process thereof, which do not need to increase investment cost and occupy land, and do not need to artificially input ozone by utilizing the process and the system, so that water resources are saved.
The technical scheme adopted by the invention is as follows:
the laminated filter internal source backwashing system comprises a water production pipe and a backwashing pipe, wherein a plurality of groups of fine filtration control assemblies are connected between the water production pipe and the backwashing pipe in parallel, each fine filtration control assembly comprises a first valve, a laminated filter unit and a three-way valve which are connected in series, the three-way valves of the fine filtration control assemblies are communicated with a water inlet pipe through pipelines, the water inlet pipe is communicated with the outlet of a backwashing pump through a pipeline, the inlet of the backwashing pump is communicated with a backwashing water tank, a backwashing valve is arranged on the pipeline connecting the backwashing pump and the water inlet pipe, a water production valve and an exhaust valve are arranged on the water production pipe, a water inlet valve is arranged on the water inlet pipe, and a drain valve is arranged on the backwashing pipe.
The process for backwashing by utilizing the internal source backwashing system of the laminated filter comprises the following steps:
the first step is as follows: closing the production line, and closing the water inlet valve and the water production valve;
the second step is that: starting a backwashing pump, a backwashing valve and a drain valve;
the third step: starting an automatic backwashing program, wherein at least one laminated filter unit performs backwashing, and the rest laminated filter units keep normal water production until all laminated filter units are subjected to backwashing in sequence;
the fourth step: closing the backwashing pump and the backwashing valve and discharging residual backwashing water;
the fifth step: opening the production line, and opening a water inlet valve and a water production valve;
in the first step, sodium hypochlorite, sodium hydroxide or hydrochloric acid is added into the backwashing water tank;
and after all the laminated filter units are back flushed, closing the back flushing pump, keeping the pressure of the laminated sheets in the laminated filter units for soaking for 5-6 hours, then opening the back flushing pump, and repeating the third step again.
The invention has the following beneficial effects:
the process of the invention omits a system of an extra backwashing pipeline and a control valve of the traditional external backwashing by adding the backwashing pump and the backwashing water tank, does not need to increase investment cost and occupation area aiming at an ultrafiltration and reverse osmosis system, reduces the cost of technical improvement and the downtime, has good backwashing effect under the high-pressure and large-water-flow flushing because the backwashing pressure is not limited by a water treatment system, and can greatly improve the capacity of removing the biomembrane and the scale by adding a chemical reagent.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein: 1. a fine filtration control assembly; 101. a first valve; 102. a lamination filter unit; 103. a three-way valve; 2. a water production valve; 3. an exhaust valve; 4. a water production pipe; 5. a backwash pipe; 6. a water inlet pipe; 7. a backwash water tank; 8. a backwash pump; 9. a back flush valve; 10. a water inlet valve; 11. a blowoff valve.
Detailed Description
The following describes specific embodiments of the present invention.
As shown in fig. 1, the laminated filter internal source backwashing system comprises a water production pipe 4 and a backwashing pipe 5, a plurality of groups of fine filtration control assemblies 1 are connected between the water production pipe 4 and the backwashing pipe 5 in parallel, each fine filtration control assembly 1 comprises a first valve 101, a laminated filter unit 102 and a three-way valve 103 which are connected in series, the three-way valves 103 of the fine filtration control assemblies 1 are communicated with a water inlet pipe 6 through pipelines, the water inlet pipe 6 is communicated with an outlet of a backwashing pump 8 through pipelines, an inlet of the backwashing pump 8 is communicated with a backwashing water tank 7, a backwashing valve 9 is arranged on the pipeline connecting the backwashing pump 8 and the water inlet pipe 6, a water production valve 2 and an exhaust valve 3 are arranged on the water production pipe 4, a water inlet valve 10 is arranged on the water inlet pipe 6, a blowdown valve 11 is arranged on the backwashing pipe 5, and the backwashing pump 8 adopts a corrosion-.
As shown in figure 1, the daily water production process of the invention is as follows: the backwashing valve 9 is closed, the backwashing pump 8 is stopped, the water inlet valve 10 is opened, each three-way valve 103 points to the inlet water, the inlet water passes through each laminated filter unit 102 and then filters out large-particle suspended matters, at the moment, each first valve 101 is opened, so that the produced water is discharged from the water production valve 2, and the exhaust valve 3 can automatically discharge free gas in the system. The water inlet pressure is 2.5-3 kilograms, the water production pressure is about 2.5 kilograms, the pressure difference of the front end and the rear end of the laminated filter unit 102 is 0.1-0.5 kilogram, and the back washing can be automatically started when the pressure reaches 0.5 kilogram.
The backwashing process of the laminated filter internal source backwashing system comprises the following steps:
the first step is as follows: and closing the production line, closing the water inlet valve 10 and the water production valve 2, adding sodium hypochlorite, sodium hydroxide or hydrochloric acid into the backwashing water tank, and adjusting to the required concentration and temperature.
The second step is that: and (4) starting a backwashing pump 8, a backwashing valve 9 and a blow-down valve 11, and adjusting backwashing pressure to 4-5 kg as required.
The third step: starting an automatic backwashing program, as shown in figure 1, when one laminated filter unit 102 performs backwashing, the other two laminated filter units 102 keep normal water production, in the laminated filter unit 102 performing backwashing, the flow direction of a three-way valve 103 connected with the laminated filter unit 102 is communicated with a backwashing pipe 5 and is discharged through a blowdown valve 11, and as the inflow water is cut off, the pressure of the water outlet end of a first valve 101 is high (2.5 kg), and the pressure of the blowdown end is low (0 kg), so that the water flow changes direction and flows from the water outlet end to the sewage end, thereby realizing backwashing. After the backwashing is finished, the three-way valve 103 connected with the laminated filter unit 102 is redirected to the water inlet pipe 6, so that the laminated filter unit 102 is recovered to the water production flow, and the backwashing process of the rest laminated filter units 102 is consistent with the steps.
And after all the laminated filter units are back flushed, closing the back flushing pump, keeping the pressure of the laminated sheets in the laminated filter units for soaking for 5-6 hours, then opening the back flushing pump, and repeating the third step again.
The fourth step: and closing the backwashing pump 8 and the backwashing valve 9 and discharging residual backwashing water.
The fifth step: the production line is opened and the water inlet valve 10 and the water production valve 2 are opened.
The backwashing only needs to be stopped when the laminated filter unit 102 is seriously polluted, does not need to close the production line when the pollution condition is not serious, and only needs to change the three-way valve 103 below the laminated filter unit 102 to be cleaned to be communicated with the backwashing pipe 5, so that water flows from the water production end to the sewage end to realize backwashing.
The process of the invention omits a system of an extra backwashing pipeline and a control valve of the traditional external backwashing by adding the backwashing pump and the backwashing water tank, does not need to increase investment cost and occupation area aiming at an ultrafiltration and reverse osmosis system, reduces the cost of technical improvement and the downtime, has good backwashing effect under the high-pressure and large-water-flow flushing because the backwashing pressure is not limited by a water treatment system, and can greatly improve the capacity of removing the biomembrane and the scale by adding a chemical reagent.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure thereof.
Claims (4)
1. Lamination filter external source backwash system, its 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).
2. A backwash process using the externally powered backwash system for a laminated filter of claim 1, comprising the steps of:
the first step is as follows: closing the production line, and closing the water inlet valve and the water production valve;
the second step is that: starting a backwashing pump, a backwashing valve and a drain valve;
the third step: starting an automatic backwashing program, wherein at least one laminated filter unit performs backwashing, and the rest laminated filter units keep normal water production until all laminated filter units are subjected to backwashing in sequence;
the fourth step: closing the backwashing pump and the backwashing valve and discharging residual backwashing water;
the fifth step: and opening the production line, and opening the water inlet valve and the water production valve.
3. The backwash process of the external backwash system of the lamination filter as defined in claim 2, wherein: in the first step, sodium hypochlorite, sodium hydroxide or hydrochloric acid is added into the backwashing water tank.
4. The backwash process of the external backwash system of the lamination filter as defined in claim 2, wherein: and after all the laminated filter units are back flushed, closing the back flushing pump, keeping the pressure of the laminated sheets in the laminated filter units for soaking for 5-6 hours, then opening the back flushing pump, and repeating the third step again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357073.5A CN110975383A (en) | 2019-12-25 | 2019-12-25 | Endogenous backwashing system and process of laminated filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357073.5A CN110975383A (en) | 2019-12-25 | 2019-12-25 | Endogenous backwashing system and process of laminated filter |
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| Publication Number | Publication Date |
|---|---|
| CN110975383A true CN110975383A (en) | 2020-04-10 |
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|---|---|---|---|
| CN201911357073.5A Pending CN110975383A (en) | 2019-12-25 | 2019-12-25 | Endogenous backwashing system and process of laminated filter |
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Application publication date: 20200410 |
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