CN108483520A - Interaction cleaning seawater filtering device - Google Patents
Interaction cleaning seawater filtering device Download PDFInfo
- Publication number
- CN108483520A CN108483520A CN201810170364.2A CN201810170364A CN108483520A CN 108483520 A CN108483520 A CN 108483520A CN 201810170364 A CN201810170364 A CN 201810170364A CN 108483520 A CN108483520 A CN 108483520A
- Authority
- CN
- China
- Prior art keywords
- valve
- filter
- water inlet
- down blow
- inlet line
- Prior art date
- 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
- 239000013535 sea water Substances 0.000 title claims abstract description 34
- 238000001914 filtration Methods 0.000 title claims abstract description 28
- 238000004140 cleaning Methods 0.000 title claims abstract description 24
- 230000003993 interaction Effects 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000010865 sewage Substances 0.000 claims abstract description 16
- 238000005192 partition Methods 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims 1
- 229910052755 nonmetal Inorganic materials 0.000 claims 1
- 239000013618 particulate matter Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
-
- 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
- B01D29/94—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 the filter cake, e.g. chutes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The present invention relates to a kind of interaction cleaning seawater filtering devices.It is including water inlet, water outlet, upper sewage draining exit, down blow mouth, upper water inlet line, upper inlet valve, scum valve, upper filter, flange partition board, lower filter, outlet valve, shell, lower water inlet line, lower inlet valve and down blow valve, basic principle：Using double filter cartridge constructions, seawater enters upper filter and lower filter simultaneously from both direction, when normal work, two filter cores filtering sea simultaneously；When blowdown, one filter core normal work is to provide the filtering sea successively flowed, back flush is carried out to another filter core, will be discharged with the particulate matter of attachment strainer inner surface inside the filter core, achieved the purpose that realize blowdown automatically, need not manually clean, extend strainer service life.
Description
Technical field
The invention belongs to marine survey technology fields, and in particular to a kind of interaction cleaning seawater filtering device, it can be to strainer
Cleaning is interacted, the large-volume particulates objects such as planktonic organism and the silt on attachment strainer are removed, to ensure marine exploration equipment
It works reliably and with long-term.
Background technology
Seawater filtering device is an indispensable key equipment for ensureing marine exploration equipment normal work, can will be extra large
The large-volume particulates objects such as impurity, silt, planktonic organism in water filter out.There is various planktonic organisms and other in ocean
Sundries, when seawater filtering device is placed in Yu Haiyang for a long time, above-mentioned planktonic organism and other sundries etc. will be trapped within
Interior is attached to screen surface, and so continuous cycle, the particle being retained down is more and more, and the rate of filtration also can
It is slower and slower, to make accuracy of measurement and reliability decrease, the working performance of marine exploration equipment is reduced, or even its funeral can be made
Lose ability to work.
To solve the above problems, through just needing to be purged the attachment of screen surface after a period of time, to ensure instrument
The normal use of device.According to manpower sweep-out method, a series of operations such as recycling salvaging are carried out, not only maintenance cost can increase
Add, and very inconvenient.Therefore, there is an urgent need to can effectively remove the equipment and technology of attachment for marine exploration equipment.This
Invention can clean strainer, and interior and the attachment on surface are removed, to extend the usage time of detecting devices, carried
The accuracy and reliability that high detecting devices measures for a long time reduce attachment and are adversely affected caused by detecting devices performance.
Invention content
The purpose of the present invention is to provide a kind of interaction cleaning seawater filtering devices.The device can match with marine exploration equipment
Set uses, and the large-volume particulates objects such as impurity, silt, planktonic organism in seawater are filtered out, and can be interacted to strainer clearly
It washes, extends the usage time of strainer, provide safeguard for marine exploration equipment long-term work.
A kind of interaction cleaning seawater filtering device proposed by the present invention, including water inlet, water outlet, upper sewage draining exit, lower row
Dirty mouth, upper water inlet line 1, upper inlet valve 2, scum valve 3, upper filter 4, flange partition board 5, lower filter 6, outlet valve 7, shell 8,
Lower water inlet line 9, lower inlet valve 10 and down blow valve 11, wherein：Upper filter 4 and lower filter 6 are cylinder-shaped, are set in shell 8
Upper filter 4 and lower filter 6 are set, flange partition board 5 is set between upper filter 4 and lower filter 6,8 middle part of shell is connected by outlet valve 7
Water outlet；Water inlet is divided into two-way, connects upper water inlet line 1 all the way, the lower water inlet line 9 of another way connection, upper water inlet line 1 according to
Secondary that upper filter 4 is connected with scum valve 3 and pipeline by upper inlet valve 2, lower water inlet line 9 passes sequentially through 10 He of lower inlet valve
Down blow valve 11 and pipeline connect lower filter 6, and using double filter cartridge constructions, seawater enters upper filter device simultaneously from both direction
Filter core 4 and lower filter 6, when normal work, upper filter 4 and lower filter 6 filtering sea simultaneously；When blowdown, a normal work of filter core
Make to provide the filtering sea successively flowed, another filter core then carries out back flush.
In the present invention, scum valve 3 and down blow valve 11 are cut using automatically controlled bi-bit bi-pass shut-off valve or automatically controlled two-position three way
Only valve, scum valve 3 and down blow valve 11, which are powered, to be opened, and power-off is closed；After scum valve 3, which is powered, to be opened, blowdown in connection
Mouthful, so that water inlet line 1 is connected with upper sewage draining exit；Down blow valve 11 is powered after unlatching, connects down blow mouth, makes lower water inlet line
9 connect with down blow mouth.
In the present invention, flange partition board 5 separates upper filter 4 and lower filter 6, forms two filtering vessels；Flange partition board 5
Material be seawater corrosion resistance metal or nonmetallic materials.Flange partition board 5 separates the inner cavity of upper filter 4 and lower filter 6,
Two filtering vessels are formed, filter capacity is also increased；Filtered seawater is along the channel outside strainer, i.e. shell 8 and upper
Channel between filter core 4 and shell 8 and lower filter 6, the connection of the two channels flow to water outlet behind the interflow of outlet valve 7；
The material of shell 8 is the metal or nonmetallic materials of seawater corrosion resistance.
In the present invention, outlet valve 7 is arranged in water outlet, and outlet valve 7 is automatically controlled bi-bit bi-pass shut-off valve or two three automatically controlled
Logical shut-off valve, must be electrically turn off, and dead electricity is opened.
When the present invention works normally, upper inlet valve 2 and lower inlet valve 10 are powered and open, scum valve 3 and down blow valve 11
Dead electricity is closed, sewage draining exit and down blow mouth in cut-out；7 dead electricity of outlet valve is opened simultaneously, connects water outlet；Seawater passes through upper respectively
Filter core 4 and lower filter 6 filter simultaneously, and particulate matter is trapped within interior；Filtered seawater, flows out to outside strainer, warp
After crossing outlet valve 7, flowed out from water outlet；Outlet valve 7 is automatically controlled bi-bit bi-pass shut-off valve or automatically controlled two-position three way shut-off valve, is powered
It closes, power-off is opened to connect water outlet；
Interaction cleaning is divided into two operating modes：Upper filter cleans and lower filter cleaning.Upper filter cleans and lower filter cleans operating mode
Alternately, it can be achieved that the cleaning of upper filter 4 and lower filter 6, reaches automatic and realize blowdown, without the purpose manually cleaned；
Upper filter cleans operating mode：2 dead electricity of upper inlet valve is closed, water inlet line 1 in cut-out；Scum valve 3, which is powered, simultaneously opens
Sewage draining exit in connection；Outlet valve 7 must be electrically turn off simultaneously, cut off water outlet；Lower water inlet line 9 keeps normal operating conditions, i.e., under
The energization of inlet valve 10 is opened, 11 dead electricity of down blow valve is closed；In this way, upper filter can only be flowed to through 6 filtered seawater of lower filter
4, it is flowed counterflow through from the outside of upper filter 4（Enter inside from outside through strainer）, by 4 inside of upper filter and its strainer inner surface
The particulate matter of upper accumulation is taken away, and is flowed out through upper sewage draining exit, to realize the purpose for carrying out self-cleaning to upper filter 4；
Lower filter cleans operating mode：Lower 10 dead electricity of inlet valve is closed, and lower water inlet line 9 is cut off；The energization of down blow valve 11 simultaneously is opened
It opens and connects down blow mouth；Outlet valve 7 must be electrically turn off simultaneously, cut off water outlet；Upper water inlet line 1 keeps normal operating conditions, i.e.,
The energization of upper inlet valve 1 is opened, 3 dead electricity of scum valve is closed；In this way, lower filter can only be flowed to through 4 filtered seawater of upper filter
6, it is flowed counterflow through from the outside of lower filter 6（Enter inside from outside through strainer）, by 6 inside of lower filter and its strainer inner surface
The particulate matter of upper accumulation is taken away, and is flowed out through down blow mouth, to realize the purpose for carrying out self-cleaning to lower filter 6；
The beneficial effects of the present invention are：The present invention in such a way that interaction is rinsed, realize upper filter to the flushing of lower filter and
Flushing of the lower filter to upper filter is discharged by sewage draining exit and is filled to take away the particulate matter of interior and strainer inner surface
It sets, achievees the purpose that realize blowdown automatically, need not manually clean, extend strainer service life.
Description of the drawings
Fig. 1 is the principle of the present invention structural schematic diagram.
Figure label：1 is upper water inlet line, and 2 be upper inlet valve, and 3 be scum valve, and 4 be upper filter, and 5 be flange partition board,
6 be lower filter, and 7 be outlet valve, and 8 be shell, and 9 be lower water inlet line, and 10 be lower inlet valve, and 11 be down blow valve.
Specific implementation mode
It is further illustrated the present invention below by embodiment combination attached drawing.
Embodiment 1：Double filter core normal seawater filterings
As shown in Figure 1, interaction cleaning seawater filtering device, using double filter cartridge constructions, seawater enters upper filter simultaneously from both direction
4 and lower filter 6, when normal work, two filter cores filtering sea simultaneously also increases filtration yield；Interaction cleaning sea water filter dress
It sets including water inlet, water outlet, upper sewage draining exit, down blow mouth, upper water inlet line 1, upper inlet valve 2, scum valve 3, upper filter
4, flange partition board 5, lower filter 6, outlet valve 7, shell 8, lower water inlet line 9, lower inlet valve 10 and down blow valve 11.
The seawater flowed into from water inlet is divided into upper and lower two-way, is flowed into respectively by upper water inlet line 1 and lower water inlet line 9
Upper filter 4 and lower filter 6；According to water inlet flow direction, inlet valve 2 and scum valve 3 are set gradually in upper water inlet line 1,
Lower inlet valve 10 and down blow valve 11 are set gradually in lower water inlet line 9；Upper inlet valve 2 and lower inlet valve 10,3 He of scum valve
Down blow valve 11 is automatically controlled bi-bit bi-pass shut-off valve or automatically controlled two-position three way shut-off valve, is powered and opens, and power-off is closed；Scum valve
3 are powered after unlatching, and sewage draining exit in connection makes water inlet line 1 be connected with upper sewage draining exit；Down blow valve 11 is powered after unlatching, connects
Logical down blow mouth, makes lower water inlet line 9 be connected with down blow mouth.
Flange partition board 5 separates the inner cavity of upper filter 4 and lower filter 6, forms two filtering vessels, also increases filtering
Ability；Filtered seawater is along the channel outside strainer, i.e., between shell 8 and upper filter 4 and shell 8 and lower filter 6
Channel, two channel connections, water outlet is flowed to behind the interflow of outlet valve 7.
When normal work, upper inlet valve 2 and lower inlet valve 10 are powered and open, and scum valve 3 and 11 dead electricity of down blow valve are closed
It closes, sewage draining exit and down blow mouth in cut-out；7 dead electricity of outlet valve is opened simultaneously, connects water outlet；Seawater passes through upper filter 4 respectively
It is filtered simultaneously with lower filter 6, particulate matter is trapped within interior；Filtered seawater, flows out to outside strainer, by water outlet
After valve 7, flowed out from water outlet.
Embodiment 2：Interaction cleaning operating mode
Interaction cleaning is divided into two operating modes：Upper filter cleans and lower filter cleaning.Upper filter cleans and lower filter cleans operating mode
Alternately, it can be achieved that the self-cleaning of upper filter 4 and lower filter, reaches automatic and realize blowdown, without the purpose manually cleaned.
Upper filter cleans operating mode：2 dead electricity of upper inlet valve is closed, water inlet line 1 in cut-out；Scum valve 3 is powered simultaneously
It opens and connects upper sewage draining exit；Outlet valve 7 must be electrically turn off simultaneously, cut off water outlet；Lower water inlet line 9 keeps normal operating conditions,
The energization of inlet valve 10 is descended to open, the closing of 11 dead electricity of down blow valve；In this way, can only be flowed to through 6 filtered seawater of lower filter
Filter core 4 is flowed counterflow through from the outside of upper filter 4, and the particulate matter accumulated on 4 inside of upper filter and its strainer inner surface is taken away,
It is flowed out through upper sewage draining exit, to realize the purpose for carrying out self-cleaning to upper filter 4.
Lower filter cleans operating mode：Lower 10 dead electricity of inlet valve is closed, and lower water inlet line 9 is cut off；Down blow valve 11 is logical simultaneously
Electric-opening connects down blow mouth；Outlet valve 7 must be electrically turn off simultaneously, cut off water outlet；Upper water inlet line 1 keeps normal work shape
State, i.e., the upper energization of inlet valve 1 is opened, 3 dead electricity of scum valve is closed；In this way, can only be flowed to down through 4 filtered seawater of upper filter
Filter core 6 is flowed counterflow through from the outside of lower filter 6, and the particulate matter accumulated on 6 inside of lower filter and its strainer inner surface is taken away,
It is flowed out through down blow mouth, to realize the purpose for carrying out self-cleaning to lower filter 6.
Claims (4)
1. a kind of interaction cleaning seawater filtering device, including water inlet, water outlet, upper sewage draining exit, down blow mouth, upper water inlet line
（1）, upper inlet valve（2）, scum valve（3）, upper filter（4）, flange partition board（5）, lower filter（6）, outlet valve（7）, shell
（8）, lower water inlet line（9）, lower inlet valve（10）With down blow valve（11）, it is characterised in that：Upper filter（4）And lower filter（6）
It is cylinder-shaped, shell（8）Interior setting upper filter（4）And lower filter（6）, upper filter（4）And lower filter（6）Between flange is set
Partition board（5）, shell（8）Middle part passes through outlet valve（7）Connect water outlet；Water inlet is divided into two-way, connects upper water inlet line all the way
（1）, the lower water inlet line of another way connection（9）, upper water inlet line（1）Pass sequentially through inlet valve（2）And scum valve（3）And
Pipeline connects upper filter（4）, lower water inlet line（9）Pass sequentially through lower inlet valve（10）With down blow valve（11）And pipeline connection
Lower filter（6）, filter device is using double filter cartridge constructions, and seawater is from both direction simultaneously into upper filter（4）And lower filter（6）,
When normal work, upper filter（4）And lower filter（6）Filtering sea simultaneously；When blowdown, a filter core normal work is continuous to provide
The filtering sea not stopped, another filter core then carry out back flush.
2. interaction cleaning seawater filtering device according to claim 1, it is characterised in that scum valve（3）With down blow valve
（11）Using automatically controlled bi-bit bi-pass shut-off valve or automatically controlled two-position three way shut-off valve, scum valve（3）With down blow valve（11）It is powered
It opens, power-off is closed；Work as scum valve（3）It is powered after opening, sewage draining exit in connection makes water inlet line（1）With upper sewage draining exit
It connects；Down blow valve（11）It is powered after opening, connects down blow mouth, make lower water inlet line（9）It is connected with down blow mouth.
3. interaction cleaning seawater filtering device according to claim 1, it is characterised in that flange partition board（5）By upper filter
（4）And lower filter（6）It separates, forms two filtering vessels；Flange partition board（5）Material be seawater corrosion resistance metal or non-
Metal material.
4. interaction cleaning seawater filtering device according to claim 1, it is characterised in that outlet valve is arranged in water outlet
（7）, outlet valve（7）It is automatically controlled bi-bit bi-pass shut-off valve or automatically controlled two-position three way shut-off valve, must be electrically turn off, dead electricity is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170364.2A CN108483520A (en) | 2018-03-01 | 2018-03-01 | Interaction cleaning seawater filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170364.2A CN108483520A (en) | 2018-03-01 | 2018-03-01 | Interaction cleaning seawater filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108483520A true CN108483520A (en) | 2018-09-04 |
Family
ID=63341029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810170364.2A Pending CN108483520A (en) | 2018-03-01 | 2018-03-01 | Interaction cleaning seawater filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108483520A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835182A (en) * | 2019-11-26 | 2020-02-25 | 浙江兴兴新能源科技有限公司 | Treatment process and treatment device for low BC ratio wastewater |
| CN115163247A (en) * | 2022-05-31 | 2022-10-11 | 中国北方发动机研究所(天津) | Self-cleaning double-filter-element oil filter device |
| WO2023231277A1 (en) * | 2022-05-31 | 2023-12-07 | 天津国投津能发电有限公司 | Automatic backwashing filtration apparatus and method for low-temperature multi-effect distillation seawater desalination system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068274A (en) * | 1991-07-06 | 1993-01-27 | 赵万富 | Filter |
| US20140263106A1 (en) * | 2013-03-14 | 2014-09-18 | Filtration Technology Corporation | Filtration system and method |
| CN104383737A (en) * | 2014-11-24 | 2015-03-04 | 同济大学 | Device with self-cleaning function for filtering in-situ seawater and using method thereof |
| CN204952418U (en) * | 2015-09-11 | 2016-01-13 | 新疆力邦科技有限责任公司 | Differential back flush filter equipment in many cabins |
| CN105854379A (en) * | 2016-06-16 | 2016-08-17 | 宿州市皖竹食品有限公司 | Bidirectional water filtering device |
-
2018
- 2018-03-01 CN CN201810170364.2A patent/CN108483520A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068274A (en) * | 1991-07-06 | 1993-01-27 | 赵万富 | Filter |
| US20140263106A1 (en) * | 2013-03-14 | 2014-09-18 | Filtration Technology Corporation | Filtration system and method |
| CN104383737A (en) * | 2014-11-24 | 2015-03-04 | 同济大学 | Device with self-cleaning function for filtering in-situ seawater and using method thereof |
| CN204952418U (en) * | 2015-09-11 | 2016-01-13 | 新疆力邦科技有限责任公司 | Differential back flush filter equipment in many cabins |
| CN105854379A (en) * | 2016-06-16 | 2016-08-17 | 宿州市皖竹食品有限公司 | Bidirectional water filtering device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835182A (en) * | 2019-11-26 | 2020-02-25 | 浙江兴兴新能源科技有限公司 | Treatment process and treatment device for low BC ratio wastewater |
| CN115163247A (en) * | 2022-05-31 | 2022-10-11 | 中国北方发动机研究所(天津) | Self-cleaning double-filter-element oil filter device |
| WO2023231277A1 (en) * | 2022-05-31 | 2023-12-07 | 天津国投津能发电有限公司 | Automatic backwashing filtration apparatus and method for low-temperature multi-effect distillation seawater desalination system |
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| PB01 | Publication | ||
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Application publication date: 20180904 |