CN102847373A - Waste liquid filtering method - Google Patents
Waste liquid filtering method Download PDFInfo
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- CN102847373A CN102847373A CN2011101892498A CN201110189249A CN102847373A CN 102847373 A CN102847373 A CN 102847373A CN 2011101892498 A CN2011101892498 A CN 2011101892498A CN 201110189249 A CN201110189249 A CN 201110189249A CN 102847373 A CN102847373 A CN 102847373A
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- waste liquid
- activated carbon
- filter method
- filter
- filter cloth
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Abstract
A waste liquid filtering method comprises the following steps: allowing a liquid containing an assisted filter material to go through a filter cloth to make the assisted filter material stack cover the surface of the filter cloth in order to form an assisted filter layer, and allowing a waste liquid to be filtered to go through the filter cloth covered with the assisted filter layer to filter the waste liquid. Most solids or impure substances in the waste liquid can be effectively filtered out through the method, so the recovery liquid obtained after the filtration can be recycled, thereby the method extremely has economic benefits.
Description
Technical field
The present invention relates to a kind of liquid waste processing, particularly a kind ofly can filter out in the waste liquid most waste liquid filter methods that admittedly contain thing or foreign body.
Background technology
In the process of general industry technique; usually can produce and contain the waste liquid that admittedly contains thing; the program of for example cutting silicon crystal block in the photoelectricity industry semiconductor technology; can use line style blade and collocation to be mixed with the cutting fluid of diamond or carborundum (being commonly called as diamond dust) abrasive particle; under the blade High Rotation Speed, silicon crystal block is cut into silicon; and the fragmentation and the chip that in the process of cutting silicon crystal block, produce; will be mingled in the cutting fluid and build up; cause cutting and liquid-solidly contain that thing content is too high can't to be continued to utilize and become waste liquid; finally can only abandon, not only not environmental protection and do not meet economic benefit.
Although there is the dealer that aforementioned waste liquid is passed through filter cloth, attempt removing consolidating in the waste liquid and contain thing, can block filter cloth because admittedly containing thing, cause filter effect not remarkable, the waste liquid after the filtration still can't reach reusable economic benefit.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of and can effectively removes the filter method that admittedly contains thing in the waste liquid.
Another object of the present invention is to provide a kind of waste liquid filter method, can effectively with the waste liquid purifying, avoid contaminated environment or recyclable.
For achieving the above object, waste liquid filter method provided by the present invention includes the following step:
The liquid that (a) will contain the drainage material is by a filter cloth, and make drainage material storehouse be covered in this filter cloth surface and form a drainage layer, and
(b) waste liquid that wish is filtered is coated with the filter cloth of this drainage material by storehouse.
Above-mentioned waste liquid filter method, wherein, this drainage material is diatomite, activated carbon, snake stone flour, ion exchange resin, quartz sand, manganese sand or its mixture in step (a).
Above-mentioned waste liquid filter method, wherein, this drainage material includes at least activated carbon powder of 50wt% in step (a).
Above-mentioned waste liquid filter method, wherein, the particle diameter of this activated carbon powder of 80wt% is between 50～200 μ m at least.
Above-mentioned waste liquid filter method, wherein, the particle diameter of this activated carbon powder of 80wt% is between 61～165 μ m at least.
Above-mentioned waste liquid filter method, wherein, the iodine number of this activated carbon powder is between 0～500mg/g.
Above-mentioned waste liquid filter method, wherein, the thickness of this drainage layer is not less than 0.8mm.
Above-mentioned waste liquid filter method, wherein, this activated carbon is the ature of coal activated carbon.
Above-mentioned waste liquid filter method, wherein, this waste liquid includes and admittedly contains thing, and this particle diameter that admittedly contains thing more than the 80wt% obtains admittedly to contain the recovery liquid that thing is lower than 0.5wt% between 1～15 μ m afterwards in step (b) at least.
Above-mentioned waste liquid filter method, wherein, the air permeability of this filter cloth is between 0.1～1c.c./cm in step (a)
2Min.
By this, consolidating in the waste liquid contains thing and can effectively be stopped by the drainage material of storehouse, and therefore can effectively remove consolidating in the waste liquid contains thing, can avoid contaminated environment and recyclable.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the schematic diagram of the employed device of a preferred embodiment of the present invention; And
Fig. 2 is the schematic diagram of the filter method of this preferred embodiment of the present invention.
Wherein, Reference numeral
The specific embodiment
In order more to understand feature of the present invention, below enumerate a preferred embodiment and cooperate description of drawings in rear.
See also Fig. 1, the employed device 10 of the waste liquid filter method of this preferred embodiment of the present invention, mainly include a drainage material accommodating barrel 20, splendid attire includes the liquid 23 of drainage material 21 such as the silicon crystal block cutting fluid in it, this drainage material accommodating barrel 20 is connected in an entrance that is provided with the plate and frame type filter-press 40 of filter cloth 41 via a drainage material injection road 30, in addition, one waste liquid accommodating barrel 50 is connected in the entrance of this plate and frame type filter-press that is provided with filter cloth 41 40 via a waste liquid pipeline 31, these waste liquid accommodating barrel 50 interior splendid attires include the waste liquid 53 that admittedly contains thing 51, the outlet of this plate and frame type filter-press 40 then reclaims liquid pipeline 33 with one respectively and a return line 35 is connected, this recovery liquid pipeline 33 is communicated in one and reclaims liquid storage barrel 60, and this return line 35 is communicated in this drainage material accommodating barrel 20.In following examples, be to illustrate with the employed silicon crystal block cutting fluid of photoelectricity industry semiconductor technology, yet in fact be not limited to this.
Waste liquid filter method of the present invention, such as Fig. 1 and shown in Figure 2, mainly be to contain first the liquid 23 of drainage material 21 by a filter cloth 41, make drainage material 21 storehouses be covered in this filter cloth 41 surfaces and form a drainage layer 43, the waste liquid 53 that again wish is filtered afterwards is coated with the filter cloth 41 of this drainage layer 43 by storehouse, stop that by this drainage layer 43 consolidating in the waste liquid 53 contains thing 51, to obtain to reclaim liquid 61.
Employed drainage material 21 can be diatomite, activated carbon, snake stone flour, ion exchange resin, quartz sand, manganese sand or its mixture in the waste liquid filter method of the present invention.And, if when the waste liquid that wish is filtered was the silicon crystal block cutting fluid, then this drainage material 21 was preferably activated carbon.Secondly, in the present embodiment, should include at least activated carbon powder of 50wt% in this drainage material 21.Moreover, in this activated carbon powder, should have at least the activated carbon powder of 80wt% to have the particle diameter of 50～200 μ m, preferably have the particle diameter of 61～165 μ m.If the particle diameter of activated carbon powder is less, as less than 50 μ m, just need the collocation air permeability lower but expensive filter cloth 41 is not inconsistent economic benefit; If the particle diameter of activated carbon powder is larger, as greater than 200 μ m, then needing to form thicker drainage layer just can have better filter effect, is not inconsistent equally economic benefit.In addition, this activated carbon is the ature of coal activated carbon of the about 200mg/g of iodine number in present embodiment, and the iodine number of this activated carbon powder also can between 0～500mg/g.If the iodine number of activated carbon powder is higher than 500mg/g, then may change the ion component that reclaims in the liquid 61, make and reclaim the function that liquid 61 loses script.
Employed filter cloth 41 preferably has 0.1～1c.c./cm in the waste liquid filter method of the present invention
2The air permeability of min.If the air permeability of filter cloth 41 is lower than 0.1c.c./cm
2Min, the frictional force when then expensive and liquid passes through is larger, and filter efficiency is poor; If the air permeability of filter cloth 41 is higher than 1c.c./cm
2Min, then drainage material 21 can pass filter cloth 41 and can't be attached to filter cloth 41 by storehouse, causes forming drainage layer 43, in present embodiment is to adopt 0.8c.c./cm
2The filter cloth of min.
In addition, in present embodiment, this waste liquid 53 contains Silicon Wafer (silicon chip) cutting fluid of thing 51 admittedly for including silicon (Si) and carborundum (SiC) particle etc., admittedly the content that contains thing in the silicon crystal block cutting fluid is about 40wt%, and has at least above the consolidating of 80wt% to contain the particle diameter that thing 51 has 1～15 μ m.
Then referring again to Fig. 1 and Fig. 2, before beginning to filter, make first the clean cutting fluid 23 that is added with drainage material 21 inject the plate and frame type filter-press 40 that is provided with this filter cloth 41 via this drainage material injection road 30, make cutting fluid 23 flow back to this drainage material accommodating barrel 20 by filter cloth 41 and via this return line 35, after repeatedly circulating, drainage material 21 in this cutting fluid 23 gradually storehouse is covered in this filter cloth 41 surfaces, form the drainage layer 43 that thickness is not less than 0.8mm, formed drainage layer 43 thickness namely are about 0.8mm in the present embodiment, after the liquid that is refluxed by return line 35 gradually becomes supernatant liquid, can stop aforementioned circulation, and begin to carry out step (b).During filtration, make and contain the useless silicon crystal block cutting fluid 53 that admittedly contains thing 51, inject the filter cloth 41 that storehouse is coated with drainage layer 43 via this waste liquid pipeline 31, stop by drainage layer 43 and admittedly to contain thing 51, contain thing 51 effectively to filter consolidating in the waste liquid 53, what need special instruction is, activated carbon powder itself as drainage material 21 in the present embodiment namely has most holes, therefore, not only the slit between each activated carbon powder can tackle that larger the consolidating of particle diameter contains thing 51 in the waste liquid 53, the hole of each activated carbon powder itself also can be tackled less the consolidating of particle diameter and contain thing 51, at last, and consolidating of acquisition contains the recovery liquid 61 that thing 51 content are lower than 0.5wt% and can flow to this recovery liquid storage barrel 60 via this recovery liquid pipeline 33.
In sum, because filter method of the present invention can utilize the drainage material that is stacked over the filter cloth surface to stop that consolidating in the waste liquid contains thing, therefore can get rid of efficiently that most consolidating contains thing in the waste liquid, and can not cause filter cloth to block, make recovery liquid can repeat recycling, therefore have economic benefit and have environment-friendly advantage concurrently.Utilize filter method of the present invention, as select the drainage material of variable grain size or heterogeneity, can reach different filter effects, for example select ion exchange resin or iodine number to be higher than the activated carbon of 500mg/g as the drainage material, specific ion in the waste liquid can be removed, namely change the chemical composition of waste liquid or with the waste liquid purifying, avoid contaminated environment or returnable effect to reach.
Certainly; the present invention also can have other various embodiments; in the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. a waste liquid filter method is characterized in that, includes following steps:
The liquid that (a) will contain the drainage material is by a filter cloth, makes drainage material storehouse be covered in this filter cloth surface and forms a drainage layer; And
(b) waste liquid that wish is filtered is coated with the filter cloth of this drainage layer by storehouse.
2. waste liquid filter method according to claim 1 is characterized in that, this drainage material is diatomite, activated carbon, snake stone flour, ion exchange resin, quartz sand, manganese sand or its mixture in step (a).
3. waste liquid filter method according to claim 1 is characterized in that, this drainage material includes at least activated carbon powder of 50wt% in step (a).
4. waste liquid filter method according to claim 3 is characterized in that, the particle diameter of this activated carbon powder of 80wt% is between 50～200 μ m at least.
5. waste liquid filter method according to claim 3 is characterized in that, the particle diameter of this activated carbon powder of 80wt% is between 61～165 μ m at least.
6. the described waste liquid filter method of any one in 5 according to claim 3 is characterized in that the iodine number of this activated carbon powder is between 0～500mg/g.
7. the described waste liquid filter method of any one in 5 according to claim 1 is characterized in that the thickness of this drainage layer is not less than 0.8mm.
8. the described waste liquid filter method of any one in 5 according to claim 2 is characterized in that this activated carbon is the ature of coal activated carbon.
9. the described waste liquid filter method of any one in 5 according to claim 3, it is characterized in that, this waste liquid includes and admittedly contains thing, and this particle diameter that admittedly contains thing more than the 80wt% obtains admittedly to contain the recovery liquid that thing is lower than 0.5wt% between 1～15 μ m afterwards in step (b) at least.
10. the described waste liquid filter method of any one in 5 according to claim 1 is characterized in that the air permeability of this filter cloth is between 0.1～1c.c./cm in step (a)
2Min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101892498A CN102847373A (en) | 2011-06-30 | 2011-06-30 | Waste liquid filtering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101892498A CN102847373A (en) | 2011-06-30 | 2011-06-30 | Waste liquid filtering method |
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| Publication Number | Publication Date |
|---|---|
| CN102847373A true CN102847373A (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101892498A Pending CN102847373A (en) | 2011-06-30 | 2011-06-30 | Waste liquid filtering method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736308A (en) * | 2013-12-31 | 2014-04-23 | 湖北纽太力环境科技有限公司 | Filter cake filtering method for filter press and filter press easy to clean |
| CN104466143A (en) * | 2013-09-16 | 2015-03-25 | 友达晶材股份有限公司 | Battery silicon material and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4344846A (en) * | 1973-03-16 | 1982-08-17 | Max Klein | Filtration using expanded styrene-polymer and polyolefin micro-bits |
| CN101244847A (en) * | 2007-02-13 | 2008-08-20 | 中芯国际集成电路制造(上海)有限公司 | Wastewater treatment system and method |
| CN101298006A (en) * | 2008-01-09 | 2008-11-05 | 上海凡清环境工程有限公司 | Intensive filtration method |
| CN102031193A (en) * | 2010-11-02 | 2011-04-27 | 薛荣秀 | Method for recovering silicon carbide and polyglycol cutting solution from silicon slice cutting waste mortar |
-
2011
- 2011-06-30 CN CN2011101892498A patent/CN102847373A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4344846A (en) * | 1973-03-16 | 1982-08-17 | Max Klein | Filtration using expanded styrene-polymer and polyolefin micro-bits |
| CN101244847A (en) * | 2007-02-13 | 2008-08-20 | 中芯国际集成电路制造(上海)有限公司 | Wastewater treatment system and method |
| CN101298006A (en) * | 2008-01-09 | 2008-11-05 | 上海凡清环境工程有限公司 | Intensive filtration method |
| CN102031193A (en) * | 2010-11-02 | 2011-04-27 | 薛荣秀 | Method for recovering silicon carbide and polyglycol cutting solution from silicon slice cutting waste mortar |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466143A (en) * | 2013-09-16 | 2015-03-25 | 友达晶材股份有限公司 | Battery silicon material and manufacturing method thereof |
| US9905845B2 (en) | 2013-09-16 | 2018-02-27 | Auo Crystal Corporation | Method for manufacturing silicon flakes, silicon-containing negative electrode and method for manufacturing the same |
| CN103736308A (en) * | 2013-12-31 | 2014-04-23 | 湖北纽太力环境科技有限公司 | Filter cake filtering method for filter press and filter press easy to clean |
| CN103736308B (en) * | 2013-12-31 | 2016-02-10 | 湖北纽太力环境科技有限公司 | A kind of filter press filter cake filter method and easy cleaning filter press |
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Application publication date: 20130102 |