CN1264592C - Technique of accurate micropores film for filterning salt water in use for making alkali - Google Patents
Technique of accurate micropores film for filterning salt water in use for making alkali Download PDFInfo
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- CN1264592C CN1264592C CN 200410033167 CN200410033167A CN1264592C CN 1264592 C CN1264592 C CN 1264592C CN 200410033167 CN200410033167 CN 200410033167 CN 200410033167 A CN200410033167 A CN 200410033167A CN 1264592 C CN1264592 C CN 1264592C
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- filter
- filtration
- filtering
- filter cake
- blowback
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- 239000003513 alkali Substances 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 150000003839 salts Chemical class 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 title abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 63
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000012065 filter cake Substances 0.000 claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000005422 blasting Methods 0.000 claims abstract description 5
- 239000012266 salt solution Substances 0.000 claims description 23
- 238000001471 micro-filtration Methods 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 claims description 13
- 239000000706 filtrate Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 10
- 230000008929 regeneration Effects 0.000 claims description 9
- 238000011069 regeneration method Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract 2
- 238000011946 reduction process Methods 0.000 abstract 1
- 239000012267 brine Substances 0.000 description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 5
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 150000001447 alkali salts Chemical class 0.000 description 2
- 238000011118 depth filtration Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 230000003260 anti-sepsis Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The present invention provides a filtration technique of a precise micropore thin layer of salt water for preparing alkali, which has the following steps: raw material salt water is loaded in a precise micropore filtering machine to be filtered, and filtering liquor enters a storage chamber on the filtering machine by a pattern plate to be delivered outside the machine; when the thickness of a filter cake reaches 0.5 to 2mm, compressed air is pressed in from the upper part of the storage chamber on the filtering machine to be formed into an air-liquid mixing liquid body with the partial filter liquor to blow a filter tube back in a fast blasting type, the filtration and the back blowing are orderly circulated, the back blowing time is less than 2 to 10 seconds, the filter cake is eliminated, and the precise micropore thin layer is regenerated chemically. The present invention has the advantages that because a filter cake layer is blown back and is fallen off when the thickness of the filter cake layer only is 0.5 to 2mm and the resistance of the filter cake is smaller during the filtration, an average filtering speed reduction process is greatly prolonged; that is to say, the average filtering speed can also be fast during the filtration by adopting the precise micropore thin layer to filter under the condition that a filtering aid is not utilized to coat in advance, and the present invention has the advantages of simple operation and low cost.
Description
Technical field
The present invention relates to a kind of alkali made from the filtering technique of salt solution, the common blowback of gas-liquid makes the come off accurate micropore thin bed filtration technology of thickening of thin cake layer during particularly a kind of blowback.
Background technology
The production of alkali or basic salt needs to make raw material with salt solution, and the quality good or not of salt solution directly influences quality, yield and the cost of finished product.Impurity in the salt solution can use and remove by heterogeneous partition method, equal phase separation method series connection.Heterogeneous partition method mainly contains methods such as filtration, sedimentation, air supporting; All phase separation method mainly contains methods such as absorption, ion-exchange.Wherein filtering is an essential very crucial again step.
The heterogeneous separation equipment of raw material salt solution is gravitational settling bucket and deep layer particle decentralized filter vat in the production of tradition alkali.Gravitational settling bucket equipment is huge, generally can only remove the fast coarse granule of sinking speed, and fine grained is difficult to efficient separation, and as some fluctuation of upstream technology, the filtrate air-teturning mixed phenomenon takes place the gravitational settling bucket easily, causes operation to worsen.At present, it is still very huge during alkali is produced at a large amount of deep layer particle decentralized filter vat equipment that adopt, its separative efficiency force of gravity settling vat is much higher, but the filter process of in-depth filtration bucket all occurs in deep layer inside, along with the particulate that deep layer inside accumulates is on the increase, the constantly displacement forward in deep layer inside of part fine grained easily takes place, wear filter at last, cause the brine quality variation:, often need carry out secondary filter in order to guarantee brine quality.In order to overcome above-mentioned deficiency, developed the tubular filter and the flexible microporous barrier pipe filter of flexible filter cloth over past ten years, and rigidity sintering charcoal plain pipe filter and the sintered microporous PE pipe of rigidity filter.More than these are also adopted in brine filter on a small quantity, the filtration metal surface of tubular filter filters, fine grain filtration occurs in the screen pipe outer surface, rather than the deep layer of screen pipe.Because the diameter of general screen pipe is all little, thereby unit filter volume inner filtration area is very big, filter the filtered fluid of equal volume, tubular filter is littler than the floor space of in-depth filtration bucket.Flexible filter cloth tubular filter pipe, because its capillary aperture can be very not little, to the very difficult efficient filtering of the solia particle of some submicron orders, brine quality is difficult to guarantee.The filtering accuracy of flexible microporous barrier tubular filter is very high, can efficiently filter sub-micron particulate, but because microporous barrier tensile strength is lower, can not carry out efficient pulse cleaning with the gas of elevated pressures, easily obstruction, fragile makes its service life lower, and use cost is quite high; The rigidity microfiltration tube mainly is plain pipe of sintering charcoal and sintered microporous PE pipe at present, the micropore size of the plain pipe of sintering charcoal is bigger, must adopt chemical cellulose to carry out precoating as filter aid, need long-time circulation during precoating, otherwise filtering accuracy and filter efficiency are not high, the price of chemical cellulose is very expensive, and running cost is higher, and operation quite bothers; The plain pipe of charcoal worsens strainability also easily for oxidant oxidation in the salt solution destroys microcellular structure; The microporous PE pipe is a kind of novel screen pipe, mechanical strength and antioxygenic property are all better, price is also lower, helps filter as adopting chemical cellulose, then filtering accuracy and filter efficiency height, filtering velocity is very fast, but running cost obviously increases, and operation is trouble, as helping filter without chemical cellulose, the capillary aperture of microporous pipe must be little, can be with Mg (OH)
2The isocolloid filter is lived, but particulates such as these colloids are very big at the resistance of filter cake that the screen pipe surface forms, and cause average rate of filtering lower.
Summary of the invention
Without the filter aid precoating, also can make and filter the average rate of filtering maintenance comparatively fast when the purpose of this invention is to provide a kind of system alkali with brine filter, and simple to operate, the accurate micropore thin bed filtration technology that cost is low again.
In order to achieve the above object, the technical solution used in the present invention is as follows:
A kind of accurate micropore thin bed filtration technology of making alkali with salt solution, it may further comprise the steps:
1. raw material salt solution is filtered by the rigidity microfiltration tube with being pumped into precise microporous filter, filtrate enters the storage chamber that is positioned at filter top through card and sends outside the machine again;
2. when filter cake thickness reaches 0.5-2mm, the top that to store up the chamber through the compressed air that purifies from precise microporous filter top is pressed into, make in compressed air and the storage chamber part filtrate form gas-liquid mixture fluid all rigidity microfiltration tubes are carried out the blasting type blowback, filter cake is come off, and the bubble floating in the blowback rear filtrate is discharged from evacuation port to card;
3. above-mentioned filtration, blowback circulate successively and carry out, and the blowback time was less than 10 seconds;
4. the filter cake under the blowback is deposited to filter bottom force feed to the filter residue storage tank;
5. when filtering velocity decline can not be satisfied technological requirement, stop to filter, unfiltered raw material salt solution in the machine is pushed back in the raw material salt water pot with compressed air;
6. chemical regeneration: regenerated liquid is carried out the circulating filtration formula and dynamically regenerates with being pumped in the filter, by compressed air regenerated liquid is pushed back the regenerated liquid storage tank behind the regeneration ending, again with the running water cleaning that recoils.
Described rigidity microfiltration tube is made of the layer structure that the several layers micropore size successively reduces from the inside to the outside.
The present invention is owing to adopted above-mentioned technology, in the filtration, filtrate is sent outside the machine through storage chamber, filter top earlier again, blowback when filter cake thickness reaches 0.5-2mm, during blowback, compressed air can form gas-liquid mixture fluid with part filtrate in the storage chamber rigidity microfiltration tube is carried out quick blasting type backwash, and filter cake was come off, screen pipe is to a certain degree regenerated, filtering velocity is recovered.Filtration, blowback circulation are carried out, the blowback time was less than 10 seconds, making whole filtration is the equal of continuous filtration, just come off and formed cake layer is very thin, resistance of filter cake is less relatively when making filtration, thereby average rate of filtering decline process is greatly prolonged, also promptly under situation without the filter aid precoating, adopt the accurate micropore thin bed filtration of this technology can make equally that average rate of filtering keeps very fast when filtering, and simple to operate, and cost is low again.Because the rigidity microfiltration tube is a layer structure, the aperture of each filter course successively reduces from the inside to the outside, and filtration resistance is reduced, and filter efficiency improves, and regeneration easily.
Description of drawings
Fig. 1 is the accurate micropore thin bed filtration process flow diagram of embodiment of the invention system alkali with salt solution.
The specific embodiment
As shown in Figure 1, embodiment of the invention system alkali comprises with lower device with the accurate micropore thin bed filtration technology of salt solution: regenerated liquid basin 1, salt solution stoste basin 2, air cleaner 3, air compressor 4, air reservoir 5, precise microporous filter 6, thickening filter residue basin 7, centrifugal pump 8, and PLC interlocking full autocontrol device.Precise microporous filter 6 is capital equipments of this technology, and it is made up of three parts, and its top is one to have the cylindrical housings of ellipse arc end socket, as filtrate or compressed-air actuated in the middle of the storage chamber; The middle part is a cylindrical housings, last, central enclosure connects by a pair of flange, the card of folder one porous between the last lower flange, and the sintered microporous screen pipe of rigidity is fixedly connected on the card hole wall, present embodiment rigidity microfiltration tube constitutes by two layers, and outer field micropore size is littler than the micropore size of internal layer; Present embodiment filter bottom is an awl bottom shell body, to also available dish of large-scale filter or ellipse arc housing.Precise microporous filter 6 inner all with feed liquid contact site and pipeline, valve, accessory all should in be coated with certain thickness anticorrosive coat, all measuring instruments should have antisepsis protector.To large-scale filter, must join the filter residue basin in addition, the size of basin depends primarily on the disposal ability of back filter residue pressing device, and the cone cornerite of tank bottom should be not more than 30 °, gets rid of smoothly in order to filter residue.Air cleaner 3 is used for the airborne oil of filtration, purification, water and dust, and 0.3 micron filter efficiency should surpass 99%; Air gas tank 5 should keep 0.6Mpa pressure; The pressure of air compressor 4 only needs 0.7Mpa; The filter area size of air throughput, air cleaner, the volume of compressed air cylinder cylinder all depend on the filter area of precise microporous filter, also depend on the filtering accuracy of filter.Each pump of this filter, valve utilize the PLC interlocking to realize full autocontrol operation.
The system alkali of present embodiment is as follows with the technological process of the accurate micropore thin bed filtration of salt solution: the raw material salt solution in the salt solution stoste basin 2 is sent in the precise microporous filter 6 by centrifugal pump 8, insoluble solid particulate in the salt solution is all by the outer surface of cut-off filter at all microfiltration tubes, filtrate enters central duct by the micro porous filtration tube wall and upwards enters storage chamber, filter top in the hole on card, sends outside the machine by pipeline again.When filter cake thickness reaches 0.5-2mm, concrete thickness can be definite through testing according to the raw material salt water-based, promptly carry out the compressed air blowback after filtering end, the storage chamber top of compressed air from precise microporous filter is pressed into, it carries out quick blasting type backwash with the part filtrate formation gas-liquid mixture fluid that stores up in the chamber to all rigidity microfiltration tubes, with accumulate that thin layer filter cake blowback at the micro porous filtration tube outer surface comes off, is deposited in the filter bottom or by force feed to thickening filter residue basin 7, more regularly dispatch to outside filter residue pressing device.After the blowback, have the air in certain amount bubble floating to discharge from evacuation port below card in the filtrate, the blowback deslagging has the microfiltration tube palingenesis concurrently, and after the blowback, screen pipe can the overwhelming majority recover its original rate of filtration.The blowback time is usually less than 10 seconds, blowback is filtered after finishing again, the blowback circulation is carried out again, and therefore filtering is the equal of continuous filtration, but after each the filtration, the resistance of microfiltration tube has certain increase, with filtering increased frequency, the resistance of microporous pipe also constantly increases, and it increases the general index of coincidence curve law of rule, be that resistance progressively slightly is increased to after the certain value, resistance can produce the sudden change formula and suddenly increase.This moment, filtering velocity obviously descended, can't satisfy technological requirement, must stop the filter operation of filter, the inner unfiltered raw material salt solution of filter housing is pushed back in the salt solution stoste basin with compressed air, if any many precise microporous filter parallel operations, the interior surplus hydraulic pressure that also this can have been stopped filter is delivered to the feed system of the filter of another continuation filtration, carries out chemical regeneration then.
The Main Ingredients and Appearance of chemical regeneration liquid should be that the solia particle that is blocked in the microporous pipe pore is dissolved fast, or fast reaction generates solable matter, or degraded rapidly, make it to become very tiny and very little particulate with the microporous pipe adhesiveness, can be developed in pore by current, chemical regeneration can make the pore of microporous pipe recover substantially.Renovation process is that regenerated liquid is passed through anticorrosion centrifugal pump force feed to precise microporous filter, carry out the dynamic regenerative process of circulating filtration formula, after chemical regeneration finishes, should utilize compressed air with in the precise microporous filter, comprise that the regenerated liquid in the pipeline partly pushes back the regenerated liquid storage tank, utilize running water with all microporous pipe then, comprise that filter inner housing and device and pipeline that all contact with regenerated liquid carry out backwash, wash no regenerated liquid residual till.
Claims (2)
1, a kind of accurate micropore thin bed filtration technology of making alkali with salt solution is characterized in that this technology may further comprise the steps:
1. raw material salt solution is filtered by the rigidity microfiltration tube with being pumped into precise microporous filter, filtrate enters the storage chamber that is positioned at filter top through card and sends outside the machine again;
2. when filter cake thickness reaches 0.5-2mm, the top that to store up the chamber through the compressed air that purifies from precise microporous filter top is pressed into, make in compressed air and the storage chamber part filtrate form gas-liquid mixture fluid all rigidity microfiltration tubes are carried out the blasting type blowback, filter cake is come off, and the bubble floating in the blowback rear filtrate is discharged from evacuation port to card;
3. above-mentioned filtration, blowback circulate successively and carry out, and the blowback time was less than 10 seconds;
4. the filter cake under the blowback is deposited to filter bottom force feed to the filter residue storage tank;
5. when filtering velocity decline can not be satisfied technological requirement, stop to filter, unfiltered raw material salt solution in the machine is pushed back in the raw material salt water pot with compressed air;
6. chemical regeneration: regenerated liquid is carried out the circulating filtration formula and dynamically regenerates with being pumped in the filter, by compressed air regenerated liquid is pushed back the regenerated liquid storage tank behind the regeneration ending, again with the running water cleaning that recoils.
2, system alkali according to claim 1 is characterized in that with the accurate micropore thin bed filtration technology of salt solution described rigidity microfiltration tube is made of the layer structure that the several layers micropore size successively reduces from the inside to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410033167 CN1264592C (en) | 2004-04-08 | 2004-04-08 | Technique of accurate micropores film for filterning salt water in use for making alkali |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410033167 CN1264592C (en) | 2004-04-08 | 2004-04-08 | Technique of accurate micropores film for filterning salt water in use for making alkali |
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| Publication Number | Publication Date |
|---|---|
| CN1562439A CN1562439A (en) | 2005-01-12 |
| CN1264592C true CN1264592C (en) | 2006-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410033167 Expired - Lifetime CN1264592C (en) | 2004-04-08 | 2004-04-08 | Technique of accurate micropores film for filterning salt water in use for making alkali |
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Families Citing this family (7)
| 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 |
| CN103111243A (en) * | 2013-02-28 | 2013-05-22 | 浙江东瓯过滤机制造有限公司 | Continuous solution production device |
| CN104645709A (en) * | 2014-03-24 | 2015-05-27 | 宋志黎 | Liquid clarification filtering machine with large treatment amount |
| CN110170192A (en) * | 2019-04-23 | 2019-08-27 | 萍乡市华星环保工程技术有限公司 | Garbage transfer station penetrating fluid filter device |
| CN112779046B (en) * | 2020-11-06 | 2022-07-05 | 中国石油天然气股份有限公司 | Device and method for preventing salt deposition corrosion of stripping tower of oil refining device |
| CN114058469B (en) * | 2021-11-24 | 2022-10-25 | 泰山恒信有限公司 | Continuous and efficient ultrasonic vinegar pouring method |
| CN114892022B (en) * | 2022-05-07 | 2024-05-28 | 赣州寒锐新能源科技有限公司 | Treatment system and process for separating fine matters from wet smelting cobalt-copper solution |
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2004
- 2004-04-08 CN CN 200410033167 patent/CN1264592C/en not_active Expired - Lifetime
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| Publication number | Publication date |
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| CN1562439A (en) | 2005-01-12 |
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Owner name: WENZHOU CITY DONGOU MICROPORE FILTER CO., LTD. Free format text: FORMER OWNER: SONG ZHIJI Effective date: 20061208 |
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Effective date of registration: 20061208 Address after: Wenzhou City, Zhejiang province 325003 Yangfushan Tu village industrial zone south Patentee after: Wenzhou Dong'ou Micropore Filtration Co.,Ltd. Address before: Wenzhou City, Zhejiang province 325003 Yangfushan Tu village industrial zone south of Wenzhou donou micro filtration Ltd. Patentee before: Song Zhiji |
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Owner name: ZHEJIANG DONG'OU FILTERING MACHINERY MANUFACTURING Effective date: 20120815 Owner name: SHANGHAI HONGLI PURIFYING TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: DONGOU MICROPOROUS FILTERING CO. LTD., WENZHOU CITY Effective date: 20120815 |
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Effective date of registration: 20210329 Address after: No.85-2, Shiniu Road, Shuige Industrial Park, Lishui City, Zhejiang Province 323000 Patentee after: ZHEJIANG DONGOU FILTER MANUFACTURING Co.,Ltd. Address before: Room 286, area I, 2nd floor, Shunpu building, 99 Gongyuan Road, Qingpu District, Shanghai, 201799 Patentee before: SHANGHAI HONGLI PURIFICATION TECHNOLOGY Co.,Ltd. Patentee before: ZHEJIANG DONGOU FILTER MANUFACTURING Co.,Ltd. |
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