CN104016457B - A kind of flocculation agent processing ceramic tile polishing waste water - Google Patents
A kind of flocculation agent processing ceramic tile polishing waste water Download PDFInfo
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- CN104016457B CN104016457B CN201410268364.8A CN201410268364A CN104016457B CN 104016457 B CN104016457 B CN 104016457B CN 201410268364 A CN201410268364 A CN 201410268364A CN 104016457 B CN104016457 B CN 104016457B
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Abstract
The present invention relates to wastewater processing technology, particularly relate to a kind of flocculation agent processing ceramic tile polishing waste water.Process a flocculation agent for ceramic tile polishing waste water, it comprises following component: quality is the attapulgite of 10% ~ 20%; Quality is the porous adsorbent of 15% ~ 25%; Quality is the aluminium salt of 50% ~ 55%, and quality is 10% ~ 15% plastic clay, and quality is 3% ~ 5% silicon ash, and quality is the calcium oxide of 1% ~ 2%, the sodium bicarbonate of above-mentioned calcium oxide quality 0.5 ~ 2 times.Use its process ceramic tile polishing waste water, ceramic tile polishing waste water can be allowed to clarify rapidly, and can, by the cotton-shaped resin isolation in ceramic tile polishing waste water, make polishing brick sludge have good suspension and plasticity, in addition, the waste water after process be neutral substantially.
Description
Technical field
The present invention relates to wastewater processing technology, particularly relate to a kind of flocculation agent processing ceramic tile polishing waste water.
Background technology
In ceramic tile producing process, in order to allow brick surface just have good planeness and glossiness, need to carry out rubbing down process more." throwing " refers to polishing, namely carries out polishing with grinding head for polishing to ceramic brick surface, and object repairs ceramic brick surface defect, obtains higher glossiness; " mill " refers to edging, namely carries out edging with bistrique to ceramic tile side plate, and object is in order to the maintenance of ceramic tile sideline is straight, specification is consistent with setting.In the above rubbing down course of processing, need to lower the temperature lubrication with water, water also can fall the chip that rubbing down produces and takes away simultaneously, avoids airborne dust more.Therefore, the process of ceramic tile rubbing down can produce a large amount of waste water.At present, the method processing above waste water is: be first introduced in wastewater disposal basin and precipitate; Then bleed off supernatant liquid, the mud of lower floor then inputs in pressure filter and carries out press filtration process, obtains sludge cake.Usual in the industry above-mentioned sludge cake is called polishing brick sludge, formerly usually it can be used as garbage loading embeading; And at present, people then utilize the components such as the silicon carbide wherein contained can produce the characteristic of gas foaming when high temperature sintering, can produce porous light building materials, but need to carry out secondary treatment to polishing brick sludge.
In addition, in existing process ceramic tile polishing waste water process, in order to allow waste water High-speed clarification, need to use some medicaments, such as flocculation agent.
Building pottery field, usually inorganic flocculating agent is used for sewage disposal.
Inorganic flocculating agent comprises Tai-Ace S 150, aluminum chloride, ferric sulfate, iron(ic) chloride etc., and wherein Tai-Ace S 150 is developed by the U.S. the earliest, and a kind of important inorganic flocculating agent always used till today.Conventional aluminium salt has Tai-Ace S 150 Al
2(SO
4)
318H
2o and alum Al
2(SO
4)
3k
2sO
424H
2o, another kind of is that molysite has Iron trichloride hexahydrate FeCl
36H
2o. ferrous sulfate hydrate FeSO
417H
2o and ferric sulfate.
In above-mentioned flocculation agent, usually use AlSnSi alloy, iron-based flocculating agent seldom uses, because utilizing it to process containing ferro element in the polishing brick sludge obtained, in order to be easy to as raw material production building material product occur look dirty defect.
In addition, because mostly ceramic tile polishing/edge grinding head is to use high-temperature resin as caking agent, therefore in ceramic tile polishing waste water, a lot of cotton-shaped high-temperature resin is contained, these cotton-shaped high-temperature resins can be agglomerating rapidly after running into flocculation agent, and the chip that absorbent ceramic brick rubbing down gets off, can rapid precipitation, but this also make the polishing brick sludge suspension that obtains and plasticity all very poor, be unfavorable for second stage employ.
Summary of the invention
The object of the invention is to propose a kind of flocculation agent, it can allow ceramic tile polishing waste water clarify rapidly, and can, by the cotton-shaped resin isolation in ceramic tile polishing waste water, make polishing brick sludge have good suspension and plasticity, in addition, the waste water after process is roughly in neutral.
For reaching this object, the present invention by the following technical solutions: a kind of flocculation agent processing ceramic tile polishing waste water, it comprises following component: quality is the attapulgite of 10% ~ 20%; Quality is the porous adsorbent of 15% ~ 25%; Quality is the aluminium salt of 50 ~ 55%, and quality is 10% ~ 15% plastic clay, and quality is 3% ~ 5% silicon ash, and quality is the calcium oxide of 1% ~ 2%; Sodium bicarbonate wherein also containing above-mentioned calcium oxide quality 0.5 ~ 2 times.
Above-mentioned porous adsorbent is one in diatomite, gac or both combinations.
Above-mentioned aluminium salt is one or more combinations in Tai-Ace S 150, aluminum chloride, alum.
Above-mentioned plastic clay can be one or more combinations in wilkinite, kaolin, mud washing.
In addition, the present invention also provides a kind of method processing ceramic tile polishing waste water, and it comprises the steps:
Step 1): reclaim waste water; By ceramic tile polishing waste water reclamation to wastewater disposal basin, after stirring, ceramic tile polishing waste water is put into treating pond;
Step 2): add flocculation agent; The ratio being 100:0.5 ~ 1 according to the quality of ceramic polished brick waste water and flocculation agent adds flocculation agent, and the component of described flocculation agent comprises: quality is the attapulgite of 10% ~ 20%; Quality is the porous adsorbent of 15% ~ 25%; Quality is the aluminium salt of 50 ~ 55%, and quality is 10% ~ 15% plastic clay, and quality is 3% ~ 5% silicon ash, and quality is the calcium oxide of 1% ~ 2%, the sodium bicarbonate of above-mentioned calcium oxide quality 0.5 ~ 2 times;
Step 3) clarification; Ceramic polished brick waste water in treating pond is left standstill >=12 hours, then bleeds off supernatant liquid, obtain lower floor's mud;
Step 4) press filtration; By step 3) mud that obtains carries out press filtration process and obtains polishing brick sludge.
Further, in step 2) described in porous adsorbent be one in diatomite, gac or both combinations.
Further, in step 2) described in aluminium salt be in Tai-Ace S 150, aluminum chloride, alum one or more combination.
Further, in step 2) described in plastic clay can be in wilkinite, kaolin, mud washing one or more combination.
Increase suspension and precipitate rapidly clarification and have certain contradiction, but well solve this problem in the present invention program.Aluminium salt in flocculation agent can allow the nonsoluble in ceramic polished brick waste water condense rapidly, porous adsorbent then can adsorb above-mentioned coagulum and precipitate, and the attapulgite added has: soil property is fine and smooth, has oily soapy, light weight, property are crisp, fracture is conchoidal or irregular shape, and water-absorbent is strong, tool viscosity and plasticity-time wet, dry post shrinkage is little, little aobvious crackle, water soaking collapses loose, and suspension meets the dielectric medium not characteristic such as flocculation sediment; The mud added in rear flocculation agent after making precipitation is suspension liquid, and has certain mobility, so just well alleviates above contradiction.
In addition, because silicon ash is comparatively light, and the light porous material in flocculation agent combines, and under the pectisation of calcium oxide, it can well adsorb cotton-shaped high-temperature resin, and because it is comparatively light, sedimentation speed is comparatively slow, after bleeding off supernatant liquid like this, the high-temperature resin contained at the top of mud layer is more, after being struck off, remaining mud, without the need to carrying out subsequent disposal, namely can be used as one of raw material of ceramic wall and floor bricks production.Remove the mud of cotton-shaped high-temperature resin, directly can add clay, feldspar, the raw materials such as sand carry out ball milling as ceramic wall and floor bricks raw material; Press filtration step can also be saved like this, can direct ball milling in suction ball grinder, and also the waste water of clarification can the reuse when ball milling, both saves man-hour like this, again conservation.
In addition, with the alkalescence of calcium oxide in the sodium bicarbonate energy added in flocculation agent, the waste water after process is made to be neutral substantially.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of the settling tank that the embodiment of the present invention 12 provides;
Fig. 2 is the cross section structure schematic diagram of the settling tank that the embodiment of the present invention 13 provides;
Fig. 3 is the cross section structure schematic diagram of the settling tank that the embodiment of the present invention 15 provides;
Fig. 4 is the settling tank cross section structure schematic diagram that the improvement project of the embodiment of the present invention 15 provides.
Label declaration: 1---settling tank; 2---ceramic tile polishing waste water; 3---filter screen; 31---the first filter screen; 32---the second filter screen; 4---water outlet; 5---support.
Embodiment
Technical scheme of the present invention is further illustrated below by embodiment.Need illustratively embodiment to be exemplary, only explanation illustration played to the present invention program, but be not construed as limiting, and wherein for those skilled in the art known knowledge have certain omission.(the embodiment 1-13 provided below is the base case for content of the present invention is described)
Embodiment 1-5
Following table 1 is for implementing 1-5 flocculant component formula (mass percent).
Table 1
In order to obtain good treatment effect, the various components in above-mentioned table are powdery granule, and particle diameter is preferably≤2mm.In above embodiment 1-5, attapulgite particle diameter≤1mm, porous adsorbent particle diameter is 0.5 ~ 2mm, and aluminium salt is buy the industrial raw material obtained; Casual clay particle diameter≤1.5mm.Plastic clay is needed to illustrate, selects the raw ore pug of exploitation also can realize the present invention, but containing more impurity in raw ore pug, be unfavorable for later use, what therefore provide in embodiments of the present invention is optimal way.
Embodiment 5-10
The present invention also provides a kind of method using above-mentioned flocculation agent process ceramic tile polishing waste water, the flocculation agent process ceramic tile polishing waste water that embodiment 6-10 provides for using embodiment 1-5, and treatment process is as follows:
Step 1): reclaim waste water; By ceramic tile polishing waste water reclamation to wastewater disposal basin, after stirring, ceramic tile polishing waste water is put into treating pond;
Step 2): add flocculation agent; The ratio being 100:0.5 according to the quality of ceramic polished brick waste water and flocculation agent adds flocculation agent;
Step 3) clarification; Ceramic polished brick waste water in treating pond is left standstill, then bleeds off supernatant liquid, obtain lower floor's mud;
Step 4) press filtration; By step 3) mud that obtains carries out press filtration process and obtains polishing brick sludge.
For in aforesaid method, step 2) in flocculation agent addition be minimum proportioning, can add some more in actual use, but will consider corresponding cost, the mass ratio of ceramic polished brick waste water and flocculation agent is be advisable in 100:0.5 ~ 1 under normal conditions.
Following table 2 is the test result of embodiment 6-10.
Table 2: test result
| Sequence number | 6 | 7 | 8 | 9 | 10 |
| Settling time (h) | 15 | 15 | 16 | 18 | 15 |
| Mud suspension | Difference | Difference | In | Excellent | Excellent |
Mud suspension index explanation: poor, refer to mud moisture content 20% ~ 23%, in mud, indissolvable component seldom suspends; In, refer to that mud moisture content is 23% ~ 25%, indissolvable component partial suspended in mud; Goodly refer to that mud moisture content is 25% ~ 27%, in mud, indissolvable component major part suspends; Excellently refer to mud moisture content 27% ~ 30%, in mud, indissolvable component suspends substantially.
Containing more high-temperature resin in ceramic tile polishing waste water, these cotton-shaped high-temperature resins are a kind of harmful components in the later use process of polishing brick sludge, and it can cause following detrimentally affect:
1, plasticity and the drying property of pug is affected; More cotton-shaped high-temperature resin can expand when drying, and this likely can drawing crack adobe;
When 2, burning till, may bubble; High-temperature resin can produce certain gas when burning till, in base substrate, form pore, and this can be used for producing light porous material, but builds fictile that this is disadvantageous, because it can reduce intensity for common.
Embodiment 11
In the present embodiment, a kind of scheme that can be separated these cotton-shaped high-temperature resins is provided.In this programme, with reference to the embodiment 5 that provides above and embodiment 10 (other embodiment is applicable equally), by being 3% ~ 5% silicon ash containing being added with mass fraction in flocculation agent, mass fraction is the calcium oxide of 1% ~ 2%.Silicon ash is lighter, combine with the light porous material in flocculation agent, and under the pectisation of calcium oxide, it can well adsorb cotton-shaped high-temperature resin, and because it is lighter, sedimentation speed is slower, after bleeding off supernatant liquid like this, the high-temperature resin contained at the top of mud layer is more, after being struck off, remaining mud, without the need to carrying out subsequent disposal, namely can be used as one of raw material of ceramic wall and floor bricks production.Remove the mud of cotton-shaped high-temperature resin, directly can add clay, feldspar, the raw materials such as sand carry out ball milling as ceramic wall and floor bricks raw material.And press filtration step can also be saved like this, and can direct ball milling in suction ball grinder, and the waste water of clarification can the reuse when ball milling, both saves man-hour like this, conservation.
Embodiment 12
In embodiment 11, mention by being 3% ~ 5% silicon ash containing being added with mass fraction in flocculation agent, and mass fraction is the calcium oxide of 1% ~ 2%.For this scheme, conventional settling tank can use at present, but in precipitation clarifying process, still have the cotton-shaped high-temperature resin of part can sink at the bottom of pond, and the high-temperature resin layer on top layer is also difficult to strike off after precipitation, a kind of special settling tank of this programme design for this reason, to overcome the above problems.With reference to Fig. 1, the settling tank that the present embodiment provides has following structure: a kind of settling tank, its degree of depth >=3m, be embedded with one deck filter screen therein, filter screen is apart from the height >=2.5m of Chi Kou, and below described filter screen≤pool side of 0.2m is provided with at least one water outlet, water outlet is connected with reuse wastewater disposal basin, on described filter screen, the aperture of filter opening is 2 ~ 5mm, is preferably 3mm.
Above design is crossed in clearance, and the cotton-shaped high-temperature resin of light porous material in flocculation agent and the absorption of silicon ash can be tackled by filter screen, and the ceramic tile chip that rubbing down gets off then majority can fall at the bottom of pond.
Like this, after a sedimentation cycle, the water outlet in opened filter tank, the waste water of clarification can enter reuse wastewater disposal basin, and then mostly on filter screen is that cotton-shaped high-temperature resin can be recycled.Then seldom containing cotton-shaped high-temperature resin in mud at the bottom of pond, can directly be used as ceramic wall and floor bricks raw material.
In such scheme, filter screen is preferably steel alloy prepared material, and settling tank is also unsuitable excessive, otherwise filter screen easily damages because of gravity deformation, by our continuous test experiments, when selecting alloy steel filter screen, filter screen thickness is not less than 5mm, is preferably 12-15mm, and the area of settling tank also unsuitable > 8m
2, design alternative≤8m
2be advisable.
In addition, for the shape of filter screen, preferably there is the arch of intermediate projections.Such supporting effect is better, and more easily removable and washable.
The aperture of filter screen, best with aperture, median pore radius > edge.
Certain filter screen can also be asymmetrical design.
In the present embodiment, have boss (not drawing in Fig. 1) at the pool wall of settling tank, filter screen carries on boss.In use also can adopt the modes such as lifting, these can suitably adjust according to specific circumstances.
In use, the filter screen in above-mentioned settling tank often because of clogging deposits filter opening, and makes the treatment time increase, and for overcoming the above problems, the present invention also provides following improvement project embodiment 13.
Embodiment 13
With reference to Fig. 2, a kind of settling tank, its degree of depth >=3m, be embedded with two-layer filter screen therein, first filter screen is apart from the height >=2.5m of Chi Kou, second filter screen is under the first filter screen, between the two every >=0.1mm, below described second filter screen≤pool side of 0.2m is provided with at least one water outlet, water outlet is connected with reuse wastewater disposal basin, on described first filter screen, the aperture of filter opening is 3 ~ 8mm, and on described second filter screen, the aperture of filter opening is 2 ~ 5mm, and on the second filter screen, the aperture of filter opening is less than the aperture of filter opening on the first filter screen.
All the other structures can be similar with embodiment 12, adopt double-layer leaching net structure, and the aperture of bottom screen is less than the aperture of top screen, larger flocculent precipitate just can be tackled by top layer filter screen, avoids the problem causing filtration efficiency to reduce because of larger flocculent precipitate blocking bottom screen.
Here explanation is needed, the structure of filter mesh layer is except the bilayer structure described in embodiment 13, it can also be multilayered structure, such as three layers, four layers and even more multi-layered, only need ensure the spacing >=0.1m of interlayer, the aperture of filter opening in its upper sieve of aperture < being in filter opening in bottom screen.Interval too small, the easy adhesion of interlayer, not easy cleaning, certainly, and also should not be too large, otherwise the laid down cost of settling tank can increase, and be difficult to lignin-sludge.
Embodiment 14
In embodiment 11, give the scheme of the cotton-shaped high-temperature resin harm of process, but wherein added calcium oxide is alkaline matter, has certain corrodibility, and water quality can be made to be alkalescence, need extra other neutralizing agents that add to process.
Present method provides a preferred scheme for this reason.Process a method for polishing waste water, it comprises the steps,
Step 1): reclaim waste water; By ceramic tile polishing waste water reclamation to wastewater disposal basin, after stirring, ceramic tile polishing waste water is put into treating pond;
Step 2): add the flocculation agent disclosed in embodiment 11; The ratio being 100:0.5 according to the quality of ceramic polished brick waste water and flocculation agent adds flocculation agent;
Step 3): in step 2) add flocculation agent after 0.5 ~ 1 hour, add the sodium bicarbonate of calcium oxide quality 1.5 times in flocculation agent;
Step 3) clarification; Ceramic polished brick waste water in treating pond is left standstill, then bleeds off supernatant liquid, obtain lower floor's mud;
Step 4) press filtration; By step 3) mud that obtains carries out press filtration process and obtains polishing brick sludge.
The waste water that waste water after the process of mensuration this method and embodiment 11 process compares.The pH value of the present embodiment processed waste water is 7.2 ~ 7.8; And the pH value of embodiment 11 processed waste water is 9 ~ 10.
Embodiment 15
In embodiment 12 and 13, describe a kind of settling tank, the known deformation induced by gravity being limited to filter screen in description therefrom, its specification has a definite limitation, if desired the above waste water of a large amount of process, then need to build multiple settling tank, high expensive, the present invention also provides following solution for this reason:
With reference to Fig. 3, a kind of settling tank, its degree of depth >=3m, be embedded with one deck filter screen therein, filter screen apart from the height >=2.5m of Chi Kou, below described filter screen≤pool side of 0.2m is provided with at least one water outlet, water outlet is connected with reuse wastewater disposal basin, on described filter screen, the aperture of filter opening is 2 ~ 5mm, is provided with multiple support at the bottom of settling tank and between filter screen, and described filter screen holds up by described support.
The cylinder being supported for cement described in the present embodiment (can have multiple change in shape, such as square column, ovallized column), detachable structure can certainly be designed to, such as some movable buckles are set sinking to the bottom at the bottom of pond, during use, support is blocked, clean or taken apart during mud in pond for recovering; In addition, can also be maybe can splitting of one with filter screen by supported design, it be more convenient to use like this.
Certainly for the scheme in embodiment 13, with reference to Fig. 4, between the first filter screen and the second filter screen, also can be provided with support, described support can be arranged on the first filter screen, also can be arranged on the second filter screen.
Here need to illustrate that the add-on of sodium bicarbonate is that 0.5 ~ 2 times of calcium oxide quality in flocculation agent is advisable.
In addition, when processing waste water, preferably, while ceramic tile polishing waste water flows into settling tank, flocculation agent is added.
In the design of settling tank, a blocking apparatus can also be set up under filter screen, when waste water flows into settling tank, blocking apparatus be closed, be flocculated after agent is caught until cotton-shaped high-temperature resin and open blocking apparatus again.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (8)
1. one kind processes the flocculation agent of ceramic tile polishing waste water, it comprises following component: mass percent is the attapulgite of 10% ~ 20%, mass percent is the porous adsorbent of 15% ~ 25%, mass percent is the aluminium salt of 50% ~ 55%, mass percent is 10% ~ 15% plastic clay, mass percent is 3% ~ 5% silicon ash, and mass percent is the calcium oxide of 1% ~ 2%, the sodium bicarbonate of above-mentioned calcium oxide quality 0.5 ~ 2 times.
2. flocculation agent as claimed in claim 1, is characterized in that, described porous adsorbent is one in diatomite, gac or both combinations.
3. flocculation agent as claimed in claim 1, is characterized in that, described aluminium salt is one or more combinations in Tai-Ace S 150, aluminum chloride, alum.
4. flocculation agent as claimed in claim 1, is characterized in that, described plastic clay is one or more combinations in wilkinite, kaolin, mud washing.
5. process a method for ceramic tile polishing waste water, it comprises the steps:
Step 1): reclaim waste water; By ceramic tile polishing waste water reclamation to wastewater disposal basin, after stirring, ceramic tile polishing waste water is put into treating pond;
Step 2): add flocculation agent; The ratio being 100:0.5 ~ 1 according to the quality of ceramic polished brick waste water and flocculation agent adds flocculation agent, the component of described flocculation agent comprises: mass percent is the attapulgite of 10% ~ 20%, mass percent is the porous adsorbent of 15% ~ 25%, mass percent is the aluminium salt of 50 ~ 55%, mass percent is 10% ~ 15% plastic clay, mass percent is 3% ~ 5% silicon ash, and mass percent is the calcium oxide of 1% ~ 2%, the sodium bicarbonate of above-mentioned calcium oxide quality 0.5 ~ 2 times;
Step 3) is clarified; Ceramic polished brick waste water in treating pond is left standstill >=12 hours, then bleeds off supernatant liquid, obtain lower floor's mud;
Step 4) press filtration; Mud step 3) obtained carries out press filtration process and obtains polishing brick sludge.
6. the method for process ceramic tile polishing waste water as claimed in claim 5, is characterized in that, step 2) described in porous adsorbent be one in diatomite, gac or both combinations.
7. the method for process ceramic tile polishing waste water as claimed in claim 5, is characterized in that, step 2) described in aluminium salt be one or more combinations in Tai-Ace S 150, aluminum chloride, alum.
8. the method for process ceramic tile polishing waste water as claimed in claim 5, is characterized in that, step 2) described in plastic clay be one or more combinations in wilkinite, kaolin, mud washing.
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Effective date of registration: 20170424 Address after: 528031 Chancheng, Foshan District, Jiangwan, No. three, No., layer 8, layer two Co-patentee after: Guangdong Dongpeng Holdings Co., Ltd. Patentee after: Foshan Dongpeng Ceramic Co., Ltd. Co-patentee after: Qingyuan Nafuna Ceramics Co.,Ltd. Address before: Chancheng District of Jiangwan city of Foshan province Guangdong three road 528031 No. 8 two Foshan city Eastroc Ceramics Co. Ltd Co-patentee before: Guangdong Dongpeng Holdings Co., Ltd. Patentee before: Foshan Dongpeng Ceramic Co., Ltd. Co-patentee before: Qingyuan Nafuna Ceramics Co.,Ltd. Co-patentee before: Guangdong Dongpeng Ceramic Co., Ltd. |