CN103550966A - Operation method of diaphragm pressure filter - Google Patents

Operation method of diaphragm pressure filter Download PDF

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Publication number
CN103550966A
CN103550966A CN201310530086.4A CN201310530086A CN103550966A CN 103550966 A CN103550966 A CN 103550966A CN 201310530086 A CN201310530086 A CN 201310530086A CN 103550966 A CN103550966 A CN 103550966A
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blowback
filter plate
pressure
time
squeezing
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CN201310530086.4A
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CN103550966B (en
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蔡小龙
杨海英
黄新颖
魏玉芹
洪昭锐
杨超
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Guangzhou Xinzhi Environmental Protection Industry Co., Ltd.
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GUANGZHOU NEWEARTH ENVIRONMENTAL PROTECTION INDUSTRY Co Ltd
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Abstract

The invention discloses an operation method of a diaphragm pressure filter. The operation method comprises the following steps of: A, compressing a filter plate, and feeding material from a feeding center pipe to the filter plate; B, at the end of the material feeding, carry out back flushing on the feeding center pipe with high-pressure air for the first time; C, at the end of the first-time back flushing, starting a squeezing water pump to fill squeezing water in the filter plate to carry out squeezing operation; D, keeping the pressure of the squeezing water, and carrying out back flushing on the feeding center pipe with high-pressure air for the second time; E, at the end of the second-time back flushing, closing the high pressure air and the squeezing water pump, and returning the squeezing water from the filter plate; and F, loosening the filter plate, discharging, and cleaning filter cloth. The operation method provided by the invention has the advantages that a diaphragm can keep a plump state in back flushing, the back flushing efficiency is high, an energy source is saved, the surface moisture content of a mud cake is low, the squeezing effect is good, and the filter cloth is easy to clean.

Description

A kind of method of operating of diaphragm filter press
Technical field
The invention belongs to technical field of sludge treatment, especially relate to a kind of method of operating of diaphragm filter press.
Background technology
The processing of municipal sludge is disposed has become urgent problem, however traditional sludge treatment device, and as centrifuge and belt filter press etc., mud extraction moisture content can only reach 78% left and right.Conditioning Technology in Pressing is that current municipal sludge is processed one of topmost technology, and mud enters filter press again and processes after chemical conditioning, and moisture content can reach below 60%, reaches the basic demand that country disposes for Sludge landfill.
Diaphragm filter press is one of nucleus equipment of sludge conditioning Technology in Pressing, and its groundwork flow process is: filter plate compression, charging, a blowback, squeezing, secondary blowback, cake discharge and cleaning filter cloth etc.Each filter plate comprises a fixed head and the diaphragm being oppositely arranged, and cavity between the two can enter mud, and the opposite side of diaphragm is provided with high-pressure intake pipe, can pass into water under high pressure and make diaphragm to fixed head Direction distortion.Filter plate pumps into the mud in conditioner in filter press by feed pump after compressing, and mud is introduced into central feed channel, then disperses to be pressed in each filter plate to surrounding.After charging completes, carry out a blowback, the remaining mud blowback in central feed channel is returned to conditioner, restart squeezing water pump, by the squeeze water of high pressure, diaphragm distortion is heaved, force filter cake attenuation, thereby the water extruding in filter cake is leached.Squeezing finish after, between filter plate part mud be extruded in central feed channel, the extruding that is no longer stressed, moisture content is still very high.Therefore need to be after squeezing finishes, need to carry out secondary blowback, the pressure-air providing by air compressor, fast the mud blowback not being squeezed in central feed channel is got back in conditioner through anti-blowpipe, avoid the mud of high-moisture percentage to pollute the mud cake having squeezed in the middle of filter plate, make pipeline cleaner, prevent line clogging.
But the secondary blowback after finishing for squeezing, traditional method of operating is release blowback, i.e. blowback again after squeeze water backflow, the diaphragm of heaving while now squeezing resiles, and produces a plenum chamber between filter plate and mud cake.The secondary blowback meeting of now carrying out brings following problem: the remaining mud that 1, the partially aqueous rate in central feed channel is very high can be brought in plenum chamber by pressure-air when secondary blowback, causes moisture content of the cake to raise; 2, the remaining mud in central feed channel directly from the filter cloth of diaphragm side spray through, thereby pollute filter cloth and filtrate; 3, part pressure-air, through plenum chamber, from the ejection of pressing filtrate delivery port, and does not concentrate on central feed channel blowback, causes blowback inefficiency, wastes energy.
Summary of the invention
The method of operating that the object of this invention is to provide a kind of effective raising squeezing effect, diaphragm filter press that efficiency is higher.
Technical solution of the present invention is: a kind of method of operating of diaphragm filter press, comprises the following steps: A, filter plate compress, from central feed channel to filter plate charging; After B, charging finish, open pressure-air central feed channel is carried out blowback for the first time: C, after blowback finishes for the first time, started squeezing water pump and squeeze to injecting squeeze water in filter plate; D, maintenance squeeze water pressure, open pressure-air central feed channel carried out to blowback for the second time; E, after blowback finishes for the second time, close pressure-air and squeezing water pump, the squeeze water in backflow filter plate; F, unclamp filter plate, discharging, cleans filter cloth.
Owing to keeping the pressure of squeeze water when the blowback for the second time, make the diaphragm of filter cloth keep the state of heaving, overwhelming majority pressure-air can be blown over by central feed channel, improved the efficiency of blowback, and avoided the remaining mud in central feed channel to enter on the mud cake in filter plate, the moisture content of mud cake reduces, and has improved the effect of squeezing.
In step B, blowback duration is 4-10s for the first time, and blowback pressure is 0.74-0.80MPa.When guaranteeing to blow out fast remaining mud, reduce the consumption of pressure-air.
The duration of blowback for the second time in step D is 4-10s, and blowback pressure is 0.74-0.80MPa.When guaranteeing to blow out fast remaining mud, reduce the consumption of pressure-air.
In step D, squeeze water pressure remains on 1.20-1.80MPa.Can guarantee that enough pressure squeezes and pressurize, improve the efficiency of blowback.
Advantage of the present invention is: during blowback, diaphragm keeps the state of heaving, and blowback efficiency is high, saves the energy, and mud cake surface moisture content is lower, squeezing better effects if, and filter cloth easily cleans.
Accompanying drawing explanation
Accompanying drawing 1 relates to the diaphragm filter press structural representation of use for the inventive method;
Accompanying drawing 2 is that in pressure-filtering process, each stage filter plate changes schematic diagram;
1, sludge conditioning pond, 2, filter press, 3, sludge pump, 4, feed pipe, 5, inlet valve, 6, central feed channel, 7, filter plate, 8, cavity, 9, squeezing water tank, 10, squeezing water pump, 11, squeezing water valve, 12, squeeze water return valve, 13, squeeze water water inlet pipe, 14, filtrate water leg, 15, air compression system, 16, high-pressure air tube, 17, blowback intake valve, 18, back-flushing valve, 19, anti-blowpipe, 20 diaphragms, 21, fixed head, 22, mud.
The specific embodiment
Embodiment 1
Consulting Fig. 1-2, is a kind of structural representation of Chamber Type Diaphragm Filter Press, and the filter plate 7 of a plurality of vertical placements is set in the main body of filter press 2, and the centre of filter plate 7 is provided with central feed channel 6.Mud in sludge conditioning pond 1 is extracted out through sludge pump 3, by being provided with the feed pipe 4 of inlet valve 5, is connected on one end of central feed channel 6.Every filter plate 7 comprises a fixed head 21 and the diaphragm 20 being oppositely arranged, cavity 8 between the two can enter mud 22, the opposite side of diaphragm 20 is provided with squeeze water water inlet pipe 13, can pass into high-pressure compressing water makes diaphragm 20 to the Direction distortion of fixed head 21, thereby extruding is positioned at the mud 22 of cavity 8, moisture in mud 22 is appeared by the filter cloth on diaphragm 20 surfaces, be pooled in filtrate water leg 14, realize the dehydration of mud.On every filter plate 7, be equipped with a squeeze water water inlet pipe 13, many squeeze water water inlet pipes 13 are connected in parallel on the export pipeline of squeezing water pump 10, the squeeze water return valve 12 that is provided with squeezing water valve 11 thereon and refluxes for bypass.The other end of central feed channel 6 connects air compression system 15 by high-pressure air tube 16, is provided with blowback intake valve 17 on high-pressure air tube 16.A side in the central feed channel 6 being connected with inlet valve 5 is provided with the anti-blowpipe 19 communicating with sludge conditioning pond 1, which is provided with back-flushing valve 18.
Consult Fig. 2, the partial enlarged drawing of filter plate 7 of take is example, and the situation of change of filter plate 7 in charging and expressing process is described.Before charging, between diaphragm 20 and fixed head 21, be provided with cavity 8, now not conducting of squeeze water water inlet pipe 13; When charging, mud 22 is from central feed channel 6 enters, and therefrom mind-set peripheral direction is filled in cavity 8, and now blowback for the first time only blows out the remaining mud in central feed channel 6, can not affect filter plate; While starting to squeeze, from squeeze water water inlet pipe 13, to diaphragm 20 1 sides, send into high-pressure compressing water, diaphragm 20 is to fixed head 21 Direction distortions, and the mud 22 in extruding cavity, flows out the moisture filter cloth that sees through diaphragm 20 surfaces, and mud 22 is squeezed.When squeeze water refluxes, diaphragm 20 restores to the original state, and itself and mud cake surface can produce space, if now carry out blowback for the second time, are easy to muddy water to be blown in this gap, cause water content to rise, and air consumption also can increase.If keep squeeze water pressure when squeezing, diaphragm 20 surfaces are close on mud cake surface, and while carrying out blowback for the second time, muddy water can not enter on mud cake surface, and air consumption also can decline.
The squeezing that " Jing Jin " board Chamber Type Diaphragm Filter Press that the model of same structure of take is XAZGFSDP400-1500-UB is carried out mud as example is processed, its filter plate number is 104, surface area is 1500 * 1500mm, it is the municipal sludge after chemical conditioning that object is processed in squeezing, and after conditioning, moisture content is 93.8%.
A method of operating for diaphragm filter press, comprises the following steps:
A, charging, open inlet valve 5, starts sludge pump 3, quantitative feeding 40.0m 3;
After B, charging finish, close inlet valve 5, start air compression system 15, make compressed air pressure reach 0.78MPa, open back-flushing valve 18 and blowback intake valve 17, after blowback 7s, close for the first time back-flushing valve 18 and blowback intake valve 17;
C, startup squeezing water pump 10, squeeze pressure 1.40MPa, opens squeezing water valve 11, squeezing time 30min;
D, startup air compression system 15, make compressed air pressure reach 0.78MPa, opens back-flushing valve 18 and blowback intake valve 17, closes for the second time back-flushing valve 18 and blowback intake valve 17 after blowback 10s;
E, stop squeezing water pump 10, close squeezing water valve 11, open squeeze water return valve 12, release;
F, unclamp filter plate, discharging, cleans filter cloth.
During blowback for the second time, compressed air pressure drops to 0.73MPa from 0.78MPa, mud cake dry tack free, and without obvious moisture, the average moisture content of mud cake is 54.21%; During discharging operation, automatically falling cake rate is 73.08%, and work slightly reduces, and the SS in filtrate is 421.46mg/L, and cleaning the filter cloth time is 103min.
Embodiment 2:
The XAZGS210/1250-UF type diaphragm filter press of Shandong Zhongda-Bright Filter Press Co., Ltd. of take is processed as the squeezing that object carries out mud, the filter plate number of this machine is 76, surface area is 1250 * 1250mm, it is the municipal sludge after chemical conditioning that object is processed in squeezing, and after conditioning, moisture content is 93.0%.A method of operating for diaphragm filter press, comprises the following steps:
A, charging, open inlet valve 5, starts sludge pump 3, quantitative feeding 16.0m 3;
After B, charging finish, close inlet valve 5, start air compression system 15, make compressed air pressure reach 0.77MPa, open back-flushing valve 18 and blowback intake valve 17, after blowback 5s, close for the first time back-flushing valve 18 and blowback intake valve 17;
C, startup squeezing water pump 10, squeeze pressure 1.50MPa, opens squeezing water valve 11, squeezing time 25min;
D, startup air compression system 15, make compressed air pressure reach 0.77MPa, opens back-flushing valve 18 and blowback intake valve 17, closes for the second time back-flushing valve 18 and blowback intake valve 17 after blowback 7s;
E, stop squeezing water pump 10, close squeezing water valve 11, open squeeze water return valve 12, release;
F, unclamp filter plate, discharging, cleans filter cloth.
During blowback for the second time, compressed air pressure drops to 0.73MPa from 0.77MPa, mud cake dry tack free, and without obvious moisture, the average moisture content of mud cake is 53.18%; During discharging operation, automatically falling cake rate is 69.74%, and work slightly reduces, and the SS in filtrate is 383.73mg/L, and cleaning the filter cloth time is 83min.
By comparative tests, further illustrate beneficial effect of the present invention below:
Comparative example 1: employing equipment is identical with embodiment 1, and a kind of method of operating of diaphragm filter press, comprises the following steps:
A, charging, open inlet valve 5, starts sludge pump 3, quantitative feeding 40.0m 3;
After B, charging finish, close inlet valve 5, start air compression system 15, make compressed air pressure reach 0.78MPa, open back-flushing valve 18 and blowback intake valve 17, after blowback 7s, close for the first time back-flushing valve 18 and blowback intake valve 17;
C, startup squeezing water pump 10, squeeze pressure 1.40MPa, opens squeezing water valve 11, after squeezing time 30min, stops squeezing water pump 10, closes and squeezes water valve 11, opens squeeze water return valve 12, and squeeze water refluxes;
D, startup air compression system 15, make compressed air pressure reach 0.78MPa, opens back-flushing valve 18 and blowback intake valve 17, closes for the second time back-flushing valve 18 and blowback intake valve 17 after blowback 10s;
E, unclamp filter plate, discharging, cleans filter cloth.
During blowback for the second time, compressed air pressure drops to 0.71MPa from 0.78MPa, and there is obvious moisture on mud cake surface, and the average moisture content of mud cake is 55.13%; During discharging operation, automatically falling cake rate is 67.03%, and the SS in filtrate is 480.62, mg/L, and cleaning the filter cloth time is 115min.
Embodiment 1 compares with comparative example 1, and what blowback declined with compressed air pressure lacks, and backflowing gas amount reduces, moisture content of the cake reduces by 0.92%, automatically falls cake rate and has improved 5.78%, and the SS of pressing filtrate has reduced by 12.31%, illustrate that squeezing efficiency is higher, scavenging period is corresponding shortening 10.43% also.
Comparative example 2: employing equipment is identical with embodiment 2, and a kind of method of operating of diaphragm filter press, comprises the following steps:
A, charging, open inlet valve 5, starts sludge pump 3, quantitative feeding 16.0m 3;
After B, charging finish, close inlet valve 5, start air compression system 15, make compressed air pressure reach 0.77MPa, open back-flushing valve 18 and blowback intake valve 17, after blowback 5s, close for the first time back-flushing valve 18 and blowback intake valve 17;
C, startup squeezing water pump 10, squeeze pressure 1.50MPa, opens squeezing water valve 11, and squeezing time 25min, stops squeezing water pump 10, closes and squeezes water valve 11, opens squeeze water return valve 12, release;
D, startup air compression system 15, make compressed air pressure reach 0.77MPa, opens back-flushing valve 18 and blowback intake valve 17, closes for the second time back-flushing valve 18 and blowback intake valve 17 after blowback 7s;
E; Unclamp filter plate, discharging, cleans filter cloth.
During blowback for the second time, compressed air pressure drops to 0.72MPa from 0.77MPa, and there is obvious moisture on mud cake surface, and the average moisture content of mud cake is 53.66%; During discharging operation, automatically falling cake rate is 63.16%, and the SS in filtrate is 462.15mg/L, and cleaning the filter cloth time is 90min.
Embodiment 2 compares with comparative example 2, and what blowback declined with compressed air pressure lacks, and backflowing gas amount reduces, moisture content of the cake reduces by 0.48%, automatically falls cake rate and has improved 6.58%, and the SS of pressing filtrate has reduced by 16.97%, illustrate that squeezing efficiency is higher, scavenging period is corresponding shortening 7.78% also.
Above-listed detailed description is for the illustrating of possible embodiments of the present invention, and this embodiment is not in order to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or change, all should be contained in the scope of the claims of this case.

Claims (4)

1. a method of operating for diaphragm filter press, is characterized in that: comprise the following steps:
A, filter plate compress, from central feed channel to filter plate charging;
After B, charging finish, open pressure-air central feed channel is carried out to blowback for the first time;
C, after blowback finishes for the first time, start squeezing water pump and squeeze to injecting squeeze water in filter plate;
D, maintenance squeeze water pressure, open pressure-air central feed channel carried out to blowback for the second time;
E, after blowback finishes for the second time, close pressure-air and squeezing water pump, the squeeze water in backflow filter plate;
F, unclamp filter plate, discharging, cleans filter cloth.
2. the method for operating of a kind of diaphragm filter press according to claim 1, is characterized in that: in step B, blowback duration is 4-10s for the first time, and blowback pressure is 0.74-0.80MPa.
3. the method for operating of a kind of diaphragm filter press according to claim 1, is characterized in that: the duration of blowback for the second time in step D is 4-10s, and blowback pressure is 0.74-0.80MPa.
4. according to the method for operating of a kind of diaphragm filter press described in claim 1 or 2 or 3, it is characterized in that: in step D, squeeze water pressure remains on 1.20-1.80MPa.
CN201310530086.4A 2013-10-30 2013-10-30 A kind of method of operating of diaphragm filter press Active CN103550966B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104147821A (en) * 2014-08-19 2014-11-19 佛山市金凯地过滤设备有限公司 Filter press one-piece discharging and draining structure
CN106430899A (en) * 2016-10-26 2017-02-22 扬州精泽汽配有限公司 Sludge filter-pressing system and filter-pressing method
CN108992983A (en) * 2018-09-27 2018-12-14 景津环保股份有限公司 A kind of chamber filter plate and application method of single chamber charging
CN110092552A (en) * 2018-01-30 2019-08-06 辽宁德智环保技术有限公司 A method of processing sludge conditioning excessive concentration
WO2020088071A1 (en) * 2018-10-30 2020-05-07 杨作星 Solid-liquid separation system for pneumatic conveying fluid bidirectional mixed pressing
CN111499150A (en) * 2020-05-11 2020-08-07 同臣环保装备科技(苏州)有限公司 Application process for improving performance of plate-and-frame type presser
CN112156510A (en) * 2020-09-30 2021-01-01 株洲时代新材料科技股份有限公司 Automatic operation control method and system for diaphragm type filter press
CN114344966A (en) * 2021-12-24 2022-04-15 格林美（江苏）钴业股份有限公司 Method for washing hydroxyl cobalt particles

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JPH07116409A (en) * 1993-10-25 1995-05-09 D & C Ltd Filter plate pressing apparatus
CN1460532A (en) * 2003-06-18 2003-12-10 罗英铭 Strong expression blade type filter
CN1762533A (en) * 2004-10-18 2006-04-26 宋家骏 Filter plate of filter press
CN101456656A (en) * 2008-12-30 2009-06-17 杭州兴源过滤机有限公司 Filtrating and squeezing process and system for desulphurization wastewater
CN101708390A (en) * 2009-11-07 2010-05-19 核工业烟台同兴实业有限公司 Vertical full-automatic diaphragm filter press
KR20100134900A (en) * 2009-06-16 2010-12-24 크라텍주식회사 Filter press having multi-functional filter plate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07116409A (en) * 1993-10-25 1995-05-09 D & C Ltd Filter plate pressing apparatus
CN1460532A (en) * 2003-06-18 2003-12-10 罗英铭 Strong expression blade type filter
CN1762533A (en) * 2004-10-18 2006-04-26 宋家骏 Filter plate of filter press
CN101456656A (en) * 2008-12-30 2009-06-17 杭州兴源过滤机有限公司 Filtrating and squeezing process and system for desulphurization wastewater
KR20100134900A (en) * 2009-06-16 2010-12-24 크라텍주식회사 Filter press having multi-functional filter plate
CN101708390A (en) * 2009-11-07 2010-05-19 核工业烟台同兴实业有限公司 Vertical full-automatic diaphragm filter press

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104147821A (en) * 2014-08-19 2014-11-19 佛山市金凯地过滤设备有限公司 Filter press one-piece discharging and draining structure
CN104147821B (en) * 2014-08-19 2016-01-20 佛山市金凯地过滤设备有限公司 A kind of filter press integral type discharging and discharge structure
CN106430899A (en) * 2016-10-26 2017-02-22 扬州精泽汽配有限公司 Sludge filter-pressing system and filter-pressing method
CN110092552A (en) * 2018-01-30 2019-08-06 辽宁德智环保技术有限公司 A method of processing sludge conditioning excessive concentration
CN108992983A (en) * 2018-09-27 2018-12-14 景津环保股份有限公司 A kind of chamber filter plate and application method of single chamber charging
WO2020088071A1 (en) * 2018-10-30 2020-05-07 杨作星 Solid-liquid separation system for pneumatic conveying fluid bidirectional mixed pressing
CN111499150A (en) * 2020-05-11 2020-08-07 同臣环保装备科技(苏州)有限公司 Application process for improving performance of plate-and-frame type presser
CN112156510A (en) * 2020-09-30 2021-01-01 株洲时代新材料科技股份有限公司 Automatic operation control method and system for diaphragm type filter press
CN112156510B (en) * 2020-09-30 2022-03-15 株洲时代新材料科技股份有限公司 Automatic operation control method and system for diaphragm type filter press
CN114344966A (en) * 2021-12-24 2022-04-15 格林美（江苏）钴业股份有限公司 Method for washing hydroxyl cobalt particles

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