CN101934163B - Method and device for backwashing filter by using liquid assisted with gas - Google Patents
Method and device for backwashing filter by using liquid assisted with gas Download PDFInfo
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- CN101934163B CN101934163B CN2010102551655A CN201010255165A CN101934163B CN 101934163 B CN101934163 B CN 101934163B CN 2010102551655 A CN2010102551655 A CN 2010102551655A CN 201010255165 A CN201010255165 A CN 201010255165A CN 101934163 B CN101934163 B CN 101934163B
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- 239000007788 liquid Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000011001 backwashing Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims description 47
- 239000012530 fluid Substances 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 8
- 230000009467 reduction Effects 0.000 description 8
- 210000000664 rectum Anatomy 0.000 description 4
- 238000005273 aeration Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a method and a device for backwashing a filter by using liquid assisted with gas. The method comprises the following steps of: 1) arranging a liquid inlet valve and a blow-off valve at the bottom of a filter of which the middle is provided with a pipe plate and the top is provided with a liquid outlet valve and a gas inlet valve, wherein the pipe plate is provided with a plurality of tubular filter materials; and a front filter cavity and a back filter cavity are arranged above and below the pipe plate; and 2) closing the liquid inlet valve and the liquid outlet valve in a backwashing process, pre-introducing gas into the front filter cavity firstly, opening the gas inlet valve and driving liquid in the back filter cavity to reversely pass through the tubular filter material through high-pressure gas so as to realize backwashing of the tubular filter material. The device of the invention is characterized in that: the opening time of the gas inlet valve and the blow-off valve are less than 0.5 seconds and the opening drift diameter of the blow-off valve is more than 200 millimeters; or an air bag is arranged in the front filter cavity and the front filter cavity is provided with a liquid outlet and a charging port communicated with the air bag; or the outer side of the front filter cavity is provided with a blind pipe communicated with the front filter cavity and the front filter cavity is provided with the liquid outlet and the charging port communicated with the blind pipe.
Description
Technical field
The present invention relates to a kind of method and device of backwash filter, particularly about a kind of method and device that adopts the gas auxiliary liquid backwash filter of pre-admission technology.
Background technology
Along with development of technology, from utilizing liquid deadweight backwash,, arrive gas auxiliary liquid backwashing technology again to the pump pressure backwashing technology, the backwash clearance improves constantly, but in physical device, the solidity particle that adhere to filter material is removed quite difficulty fully.The clearance of solidity thing has directly determined the life-span and the maintenance period of filter in the backwash process, and the height of filter material both sides backwash peak value pressure reduction directly determines the height of clearance, therefore improves the key technology that backwash peak value pressure reduction has become filter plant.Existing gas auxiliary liquid backwash filter at first will be filtered back cavity and link to each other with high-pressure air source in backwash process; This moment, the filter internal pressure rapidly increased to identical with bleed pressure; After pressure balance, open blowoff valve again; Utilize gases at high pressure to promote the filter back reverse high speed of liquid and pass filter material, adhere to surface of filter medium and the inner solidity particle of filter opening thereby wash away.This backwash mode makes filter material both sides pressure reduction only depend on the pressure of gases at high pressure, is not affected by other factors, and it is more reliable and stable than before to work, and the backwash clearance is also higher.
The part but existing gas auxiliary liquid backwash filter still comes with some shortcomings; Its backwash process begins along with the unlatching of blowoff valve; Existing all kinds of valves all can have bigger resistance when some just opening; Especially for opening slower heavy caliber blowoff valve, its slowly breakdown action can seriously undermine recoil peak value pressure reduction, and then cause clearance very low.For example in research process of the present invention, the researcher is with 8kg/cm
2Gases at high pressure the filter of 150 tons/hour of certain metered flows is carried out backwash, the peak value pressure reduction that records the filter material both sides has only 1～2kg/cm
2, all the other power all are lost in along the journey water resistance, especially open on the blowoff valve under the total state not.
Summary of the invention
To the problems referred to above, the objective of the invention is to propose a kind of method and device that improves the gas auxiliary liquid backwash filter of backwash efficient through the pre-admission technology.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of method of gas auxiliary liquid backwash filter; It may further comprise the steps: 1) in the middle of one, be provided with tube sheet; Tube sheet is provided with some tubulose filter materials, and one feed liquor valve is set the upper and lower filter bottom that is provided with filter ante-chamber and filter back cavity of tube sheet and a blowoff valve, top are provided with a liquid valve and an air inlet; 2) during backwash; Close said feed liquor valve and liquid valve, at first said intake valve is opened in pre-admission in said filter ante-chamber then; Liquid at high speed through gases at high pressure promote in the said filter back cavity is oppositely passed said tubulose filter material, realizes the backwash to said tubulose filter material.
The mode of said pre-admission can adopt: 1) select the opening time less than 0.5 second valve as intake valve and blowoff valve, and the perforate latus rectum of said blowoff valve is greater than 200 millimeters; When 2) carrying out backwash, after the unlatching blowoff valve gets into the gas of scheduled volume earlier, open intake valve again.
The gas of said scheduled volume depend on through calculate or experiment obtains, get into the filter ante-chamber from blowoff valve and arrive the gas flow before the tubulose filter material lower surface.
The mode of said pre-admission also can adopt: 1) in said filter ante-chamber, an air bag is set, a leakage fluid dram is set on the wall of said filter ante-chamber; When 2) carrying out backwash, predetermined amounts inflation in air bag earlier, and open said leakage fluid dram the liquid of being extruded by said air bag is discharged, stop inflation then and close leakage fluid dram, open intake valve and blowoff valve again.
The mode of said pre-admission can also adopt: the blind pipe that 1) is communicated with it in said filter ante-chamber arranged outside one is provided with a leakage fluid dram on the wall of said filter ante-chamber; When 2) carrying out backwash, predetermined amounts inflation in said blind pipe earlier, and open said leakage fluid dram the liquid of being extruded by gas is discharged, stop inflation then and close said leakage fluid dram, open intake valve and blowoff valve again.
The order of said unlatching intake valve and blowoff valve is opened blowoff valve again for opening or open earlier intake valve simultaneously.
Working flow when said filter filters is greater than 100 tons/hour.
Realize the device of a kind of gas auxiliary liquid backwash filter of said method; It is characterized in that: it comprises a filter ante-chamber and filter back cavity through the tube sheet separation; Said tube sheet is provided with some tubulose filter materials, and said filter ante-chamber bottom is provided with feed liquor valve and blowoff valve, and top of chamber is provided with liquid valve and intake valve after the said filter; The opening time of said intake valve and blowoff valve was less than 0.5 second, and the perforate latus rectum of said blowoff valve is greater than 200 millimeters.
Realize the device of the another kind of gas auxiliary liquid backwash filter of said method; It is characterized in that: it comprises a filter ante-chamber and filter back cavity through the tube sheet separation; Said tube sheet is provided with some tubulose filter materials, and said filter ante-chamber bottom is provided with feed liquor valve and blowoff valve, and top of chamber is provided with liquid valve and intake valve after the said filter; Be provided with an air bag in the said filter ante-chamber, said filter ante-chamber is provided with the inflation inlet that a leakage fluid dram and is communicated with said air bag.
Realize the device of another gas auxiliary liquid backwash filter of said method; It is characterized in that: it comprises a filter ante-chamber and filter back cavity through the tube sheet separation; Said tube sheet is provided with some tubulose filter materials, and said filter ante-chamber bottom is provided with feed liquor valve and blowoff valve, and top of chamber is provided with liquid valve and intake valve after the said filter; Said filter ante-chamber arranged outside has the blind pipe that is communicated with it, and said filter ante-chamber is provided with the inflation inlet that a leakage fluid dram and is communicated with said blind pipe.
The present invention is owing to take above technical scheme, and it has the following advantages: 1, the inventive method is owing to take the pre-admission measure, when backwash process is begun on filter; Earlier charge into a certain amount of gas, and discharge corresponding liquid, so that the high-impedance state for backwash pressure reduction peak value during no longer because of inlet open is weakened to the filter ante-chamber; Therefore under the situation of equal recoil bleed pressure; Can effectively reduce the energy loss of other position of pipeline, the more effective pressure reduction that will recoil concentrates on the filter material both sides, significantly promotes the peak value pressure reduction of filter material both sides; Thereby improve backwash efficient, prolong filter life and maintenance period.2, apparatus of the present invention are owing to taking intake valve and the blowoff valve of opening time less than 0.5 second; The perforate latus rectum of blowoff valve is set to greater than 200mm simultaneously, therefore when the recoil operation, can open blowoff valve earlier fast; Treat that extraneous gas gets into the filter ante-chamber; But be no more than in the tubulose filter material lower surface, open intake valve more fast, the resistance that this moment, air inlet valve position caused gas flow is much smaller than the liquid flow resistance; The motive force that gases at high pressure produced is concentrated to act on and is promoted filtrating and pass the tubulose filter material, has ensured backwash efficient effectively.3, apparatus of the present invention are owing to be provided with an air bag or blind pipe in the filter ante-chamber; Therefore the gas outlet that on the filter ante-chamber, is provided with leakage fluid dram and is communicated with air bag or blind pipe when the recoil operation, can inflate to air bag or blind pipe earlier; The filtrating of cleaning for recoil is reserved in the filter ante-chamber can the compressed gas compartment; Like this when opening intake valve, the motive force that gases at high pressure produced also can be concentrated acting on and promote filtrating and pass the tubulose filter material, has ensured backwash efficient effectively.The present invention can be widely used in the backwash process of various filters.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is another embodiment of the present invention structural representation
Fig. 3 is yet another embodiment of the invention structural representation
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
Embodiment 1:
As shown in Figure 1, the present invention includes a filter ante-chamber 1 and a filter back cavity 2, to separate through a tube sheet 3 between filter ante-chamber 1 and the filter back cavity 2, tube sheet 3 is provided with some tubulose filter materials 4.The inlet of filter ante-chamber 1 bottom is provided with feed liquor valve 5, and sewage draining exit is provided with blowoff valve 6.The liquid outlet at filter back cavity 2 tops is provided with liquid valve 7, and air inlet is provided with intake valve 8.
In the foregoing description, the liquid outlet of filter back cavity 2 is arranged on the peak of filter back cavity 2 or near the peak place, the perforate latus rectum of the sewage draining exit of filter ante-chamber 1 is greater than 200 millimeters.The blowoff valve 6 of filter ante-chamber 1 and the intake valve 8 of filter back cavity 2 should select time from full-shut position to complete opening state less than 0.5 second.
In the foregoing description, when carrying out forward filter, liquid gets into filter ante-chamber 1 from inlet 5, after 4 filtrations of tubulose filter material, gets into the filter back cavity 2 of tube sheet 3 tops, discharges from liquid outlet, filters ante-chamber 1 this moment and all is full of liquid with filtering in the back cavity 2.When the beginning backwash; At first close feed liquor valve 5 and liquid valve 7, open blowoff valve 6, filter this moment in ante-chamber 1 and the filter back cavity 2 pressure rapidly with blowoff valve 6 outside pressure balance; Blowoff valve 6 outer gases begin to get into filter ante-chamber 1; Open intake valve 8 then, the liquid at high speed that gases at high pressure will promote in the filter back cavity 2 is oppositely passed tubulose filter material 4, realizes the backwash to tubulose filter material 4.
In the above-mentioned backwash process, after guaranteeing that blowoff valve 6 is opened, extraneous gas can not get into filter back cavity 2, and unlatching intake valve 8 and the time difference of opening blowoff valve 6 depend on before gas arrival tubulose filter material 4 lower surfaces through blowoff valve 6 entering filter ante-chambers 1.
Embodiment 2:
As shown in Figure 2, the difference of present embodiment and embodiment 1 is in filter ante-chamber 1, to be provided with an air bag 9, and air bag 9 can connect extraneous low-pressure gas through an inflation inlet 10, on filter ante-chamber 1, a leakage fluid dram 11 is set.Present embodiment is to the opening time difference no requirement (NR) of the intake valve 8 and the blowoff valve 6 of filter ante-chamber 1 of filter back cavity 2.
In the present embodiment, when stopping to filter preparation beginning backwash, at first close feed liquor valve 5 and liquid valve 7; Inflation inlet 10 through being arranged on the filter ante-chamber 1 is inflated to air bag 9, opens the leakage fluid dram 11 that is arranged on filter ante-chamber 1 simultaneously, and the liquid that air bag 9 expansions squeeze out is discharged; Until reaching predetermined aeration quantity; Stop inflation and close leakage fluid dram 11, open intake valve 8 and blowoff valve 6, the liquid at high speed that gases at high pressure will promote in the filter back cavity 2 is oppositely passed tubulose filter material 4; With air bag 9 compressions, and then realize of the backwash of the quick flowing liquid of high pressure to tubulose filter material 4.
In the foregoing description; Intake valve 8 can be opened with blowoff valve 6 simultaneously, after also can opening intake valve 8 earlier and carrying out backwash, opens blowoff valve 6 effluent discharges again; Key is an inflatable air bag 9, for highly pressurised liquid provides the space that can compress through tubulose filter material 4 fast.
Embodiment 3:
As shown in Figure 3; Present embodiment and embodiment 2 are similar; It is the blind pipe 12 that is communicated with it in the arranged outside one of filtering ante-chamber 1, and extraneous low-pressure gas can be inflated to blind pipe 12 through the inflation inlet 13 that is arranged on the blind pipe 12, on filter ante-chamber 1, also is provided with a leakage fluid dram 11.
In the present embodiment, when carrying out forward filter, all be full of liquid in filter ante-chamber 1, filter back cavity 2 and the blind pipe 12; When stopping to filter preparation beginning backwash; At first close feed liquor valve 5 and liquid valve 7, inflate in blind pipe 12 through inflation inlet 13 then, and open leakage fluid dram 11 liquid that is extruded is discharged; Until reaching predetermined aeration quantity, stop inflation and close leakage fluid dram 11; Open intake valve 8 and blowoff valve 6, the liquid at high speed that gases at high pressure will promote in the filter back cavity 2 is oppositely passed tubulose filter material 4, with the compression of the gas in the blind pipe 11, and then realizes the backwash of the quick flowing liquid of high pressure to tubulose filter material 4.
In the foregoing description; Intake valve 8 also can be opened with blowoff valve 6 simultaneously, or after unlatching intake valve 8 carries out backwash earlier, opens blowoff valve 6 effluent discharges again; Key is the inflation of blind pipe top, for highly pressurised liquid provides the space that can compress through tubulose filter material 4 fast.
In the foregoing description 2,3, concrete aeration quantity is passed through tubulose filter material 4 needed spaces fast according to the confession highly pressurised liquid that is provided with in advance, through calculating or the experiment decision.
Among above-mentioned each embodiment, the working flow when filter of the present invention filters is greater than 100 tons/hour,
The present invention only describes with the foregoing description; The structure of each parts, the position is set and connects and all can change to some extent; On the basis of technical scheme of the present invention; All improvement and equivalents of individual component being carried out according to the principle of the invention all should not got rid of outside protection scope of the present invention.
Claims (10)
1. the method for a gas auxiliary liquid backwash filter, it may further comprise the steps:
1) in the middle of one, be provided with tube sheet, tube sheet is provided with some tubulose filter materials, and one feed liquor valve is set the upper and lower filter bottom that is provided with filter ante-chamber and filter back cavity of tube sheet and a blowoff valve, top are provided with a liquid valve and an intake valve;
2) during backwash; Close said feed liquor valve and liquid valve, at first said intake valve is opened in pre-admission in said filter ante-chamber then; Liquid at high speed through gases at high pressure promote in the said filter back cavity is oppositely passed said tubulose filter material, realizes the backwash to said tubulose filter material; The mode of said pre-admission is following:
1. in said filter ante-chamber, an air bag is set, a leakage fluid dram is set on the wall of said filter ante-chamber;
When 2. carrying out backwash, predetermined amounts inflation in air bag earlier, and open said leakage fluid dram the liquid of being extruded by said air bag is discharged, stop inflation then and close leakage fluid dram, open intake valve and blowoff valve again.
2. the method for a kind of gas auxiliary liquid backwash filter as claimed in claim 1 is characterized in that: the order of said unlatching intake valve and blowoff valve is for open simultaneously.
3. the method for a kind of gas auxiliary liquid backwash filter as claimed in claim 1 is characterized in that: the order of said unlatching intake valve and blowoff valve is opened blowoff valve again for opening intake valve earlier.
4. like the method for claim 1 or 2 or 3 described a kind of gas auxiliary liquid backwash filters, it is characterized in that: the working flow when said filter filters is greater than 100 tons/hour.
5. the method for a gas auxiliary liquid backwash filter, it may further comprise the steps:
1) in the middle of one, be provided with tube sheet, tube sheet is provided with some tubulose filter materials, and one feed liquor valve is set the upper and lower filter bottom that is provided with filter ante-chamber and filter back cavity of tube sheet and a blowoff valve, top are provided with a liquid valve and an intake valve;
2) during backwash; Close said feed liquor valve and liquid valve, at first said intake valve is opened in pre-admission in said filter ante-chamber then; Liquid at high speed through gases at high pressure promote in the said filter back cavity is oppositely passed said tubulose filter material, realizes the backwash to said tubulose filter material; The mode of said pre-admission is following:
1. the blind pipe that is communicated with it in said filter ante-chamber arranged outside one is provided with a leakage fluid dram on the wall of said filter ante-chamber;
When 2. carrying out backwash, predetermined amounts inflation in said blind pipe earlier, and open said leakage fluid dram the liquid of being extruded by gas is discharged, stop inflation then and close said leakage fluid dram, open intake valve and blowoff valve again.
6. the method for a kind of gas auxiliary liquid backwash filter as claimed in claim 5 is characterized in that: the order of said unlatching intake valve and blowoff valve is for open simultaneously.
7. the method for a kind of gas auxiliary liquid backwash filter as claimed in claim 5 is characterized in that: the order of said unlatching intake valve and blowoff valve is opened blowoff valve again for opening intake valve earlier.
8. like the method for claim 5 or 6 or 7 described a kind of gas auxiliary liquid backwash filters, it is characterized in that: the working flow when said filter filters is greater than 100 tons/hour.
9. the device of the gas auxiliary liquid backwash filter of a realization such as claim 1 or 2 or 3 said methods; It is characterized in that: it comprises a filter ante-chamber and filter back cavity through the tube sheet separation; Said tube sheet is provided with some tubulose filter materials, and said filter ante-chamber bottom is provided with feed liquor valve and blowoff valve, and top of chamber is provided with liquid valve and intake valve after the said filter; Be provided with an air bag in the said filter ante-chamber, said filter ante-chamber is provided with the inflation inlet that a leakage fluid dram and is communicated with said air bag.
10. the device of the gas auxiliary liquid backwash filter of a realization such as claim 5 or 6 or 7 said methods; It is characterized in that: it comprises a filter ante-chamber and filter back cavity through the tube sheet separation; Said tube sheet is provided with some tubulose filter materials; Said filter ante-chamber bottom is provided with feed liquor valve and blowoff valve; Said filter back top of chamber is provided with liquid valve and intake valve, and said filter ante-chamber arranged outside has the blind pipe that is communicated with it, and said filter ante-chamber is provided with the inflation inlet of a leakage fluid dram and the said blind pipe of a connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102551655A CN101934163B (en) | 2010-08-16 | 2010-08-16 | Method and device for backwashing filter by using liquid assisted with gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102551655A CN101934163B (en) | 2010-08-16 | 2010-08-16 | Method and device for backwashing filter by using liquid assisted with gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101934163A CN101934163A (en) | 2011-01-05 |
| CN101934163B true CN101934163B (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102551655A Expired - Fee Related CN101934163B (en) | 2010-08-16 | 2010-08-16 | Method and device for backwashing filter by using liquid assisted with gas |
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| Country | Link |
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| CN (1) | CN101934163B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921227A (en) * | 2012-11-09 | 2013-02-13 | 大连山元机械制造有限公司 | Waste acid treatment device and waste acid treatment method |
| CN104785001A (en) * | 2015-04-10 | 2015-07-22 | 深圳市阿尔法特网络环境有限公司 | Liquid filtering device |
| CN107626145A (en) * | 2017-09-30 | 2018-01-26 | 东莞安默琳机械制造技术有限公司 | Glass grinding fluid ultra-filtration system and its method |
| CN107670398A (en) * | 2017-11-27 | 2018-02-09 | 山东赛恩环保设备有限公司 | A kind of sewage water filtration tank |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139849Y (en) * | 1992-11-24 | 1993-08-11 | 陈聪海 | Automatic countercurrent washing water strainer |
| CN2661288Y (en) * | 2003-11-14 | 2004-12-08 | 安泰科技股份有限公司 | Indirection type gas assisted back flushing and purifying liquid filtering device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5534128A (en) * | 1978-08-31 | 1980-03-10 | Ito Tekkosho:Kk | Back wash type filtering device by air |
| JPH10244135A (en) * | 1997-03-07 | 1998-09-14 | Hitachi Ltd | Back-washing method of filter, its operation, method of estimating service life of filter element, and regeneration of filter element |
| CN2629799Y (en) * | 2003-08-05 | 2004-08-04 | 唐志芳 | Water purifier with back-flush device |
| CN2841134Y (en) * | 2005-11-19 | 2006-11-29 | 岳阳市新科环保设备工程有限公司 | On-line back kicking device for inorganic film separation |
| CN201260911Y (en) * | 2008-05-09 | 2009-06-24 | 大连广汇化学有限公司 | Filtering equipment for sewage disposal |
-
2010
- 2010-08-16 CN CN2010102551655A patent/CN101934163B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139849Y (en) * | 1992-11-24 | 1993-08-11 | 陈聪海 | Automatic countercurrent washing water strainer |
| CN2661288Y (en) * | 2003-11-14 | 2004-12-08 | 安泰科技股份有限公司 | Indirection type gas assisted back flushing and purifying liquid filtering device |
Non-Patent Citations (2)
| Title |
|---|
| JP昭55-34128A 1980.03.10 |
| JP特开平10-244135A 1998.09.14 |
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