CN111115906A - Silicon dioxide production sewage treatment system and treatment method - Google Patents
Silicon dioxide production sewage treatment system and treatment method Download PDFInfo
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- CN111115906A CN111115906A CN202010053578.9A CN202010053578A CN111115906A CN 111115906 A CN111115906 A CN 111115906A CN 202010053578 A CN202010053578 A CN 202010053578A CN 111115906 A CN111115906 A CN 111115906A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 239000010865 sewage Substances 0.000 title claims abstract description 143
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 72
- 235000012239 silicon dioxide Nutrition 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims description 25
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 134
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims abstract description 122
- 239000000391 magnesium silicate Substances 0.000 claims abstract description 122
- 229910052919 magnesium silicate Inorganic materials 0.000 claims abstract description 122
- 235000019792 magnesium silicate Nutrition 0.000 claims abstract description 122
- 238000004062 sedimentation Methods 0.000 claims abstract description 74
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 32
- 239000002253 acid Substances 0.000 claims abstract description 22
- -1 fluorine ions Chemical class 0.000 claims abstract description 21
- 150000005837 radical ions Chemical class 0.000 claims abstract description 21
- RZTAMFZIAATZDJ-UHFFFAOYSA-N felodipine Chemical compound CCOC(=O)C1=C(C)NC(C)=C(C(=O)OC)C1C1=CC=CC(Cl)=C1Cl RZTAMFZIAATZDJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011737 fluorine Substances 0.000 claims abstract description 13
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 34
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000004064 recycling Methods 0.000 claims description 10
- 239000002244 precipitate Substances 0.000 claims description 9
- 238000013268 sustained release Methods 0.000 claims description 9
- 239000012730 sustained-release form Substances 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 235000019738 Limestone Nutrition 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 239000008213 purified water Substances 0.000 claims description 6
- 229910052604 silicate mineral Inorganic materials 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 230000003472 neutralizing effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 claims 7
- 238000011085 pressure filtration Methods 0.000 claims 3
- 239000000378 calcium silicate Substances 0.000 claims 1
- 229910052918 calcium silicate Inorganic materials 0.000 claims 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004883 computer application Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
A silicon dioxide production sewage treatment system comprises a rapid neutralization channel, a calcium carbonate slow-release tank, a first sedimentation tank, a magnesium silicate pre-slow-release tank, a second sedimentation tank, a plurality of magnesium silicate treatment tanks and a third sedimentation tank which are sequentially communicated, wherein calcium carbonate blocks for removing acid radical ions in silicon dioxide production sewage are respectively contained in the rapid neutralization channel and the calcium carbonate slow-release tank, magnesium silicate blocks for removing fluorine ions in the silicon dioxide production sewage are respectively contained in the magnesium silicate pre-slow-release tank and each magnesium silicate treatment tank, and flowing water gaps convenient for flowing of the silicon dioxide production sewage are respectively reserved between the calcium carbonate blocks and between the magnesium silicate blocks. The system has reasonable design, simple use, convenience and effectiveness, can ensure that the silicon dioxide production sewage reaches the discharge standard through the two-step treatment of calcium carbonate and magnesium silicate, can be recycled and reused, and effectively solves the problem of treating the silicon dioxide production sewage.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a silicon dioxide production sewage treatment system and a silicon dioxide production sewage treatment method.
Background
The chemical formula of the silicon dioxide is SiO2, the silicon dioxide has crystalline state and amorphous state, the silicon dioxide existing in nature such as quartz, quartz sand and the like is generally called as silica, pure quartz is colorless crystal, and the silicon dioxide has wide application range and is mainly used for manufacturing glass, water glass, pottery, enamel, refractory materials, aerogel felt, silicon iron, molding sand, simple substance silicon, cement and the like.
At present, along with the development of science and technology, intelligent chips are increasingly applied, chips are mainly made of monocrystalline silicon, and the monocrystalline silicon is made of high-purity silicon dioxide, so that more and more companies are researching how to purify silicon dioxide to prepare high-purity silicon dioxide with higher precision, and the existing main technical means is to perform acid washing and purification on low-purity quartz sand to prepare high-purity quartz sand, so that high-purity silicon dioxide is obtained.
In the purification process of silicon dioxide, a large amount of sewage is generated, the sewage contains a large amount of acid radical ions and fluoride ions and is difficult to remove, calcium hydroxide is generally adopted to treat the silicon dioxide production sewage in the prior art, but the calcium hydroxide is slightly soluble in water, the addition amount and the addition time are difficult to control, the consumption of the calcium hydroxide is large, the treatment cost is high, and at present, a more effective and reasonable silicon dioxide sewage treatment mode is lacked.
Disclosure of Invention
The invention aims to solve the technical problem of providing a silicon dioxide production sewage treatment system which is reasonable in design, convenient, effective, low in cost and good in treatment effect and aims at overcoming the defects of the prior art.
The invention also provides a treatment method of the silicon dioxide production sewage treatment system.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a silicon dioxide production sewage treatment system which comprises a rapid neutralization channel, a calcium carbonate slow-release tank, a first sedimentation tank, a magnesium silicate pre-slow-release tank, a second sedimentation tank, a plurality of magnesium silicate treatment tanks and a third sedimentation tank which are sequentially communicated, wherein calcium carbonate blocks for removing acid radical ions in silicon dioxide production sewage are respectively filled in the rapid neutralization channel and the calcium carbonate slow-release tank, magnesium silicate blocks for removing fluorine ions in the silicon dioxide production sewage are respectively filled in the magnesium silicate pre-slow-release tank and each magnesium silicate treatment tank, and flowing water gaps which are convenient for the silicon dioxide production sewage to flow are respectively reserved among the calcium carbonate blocks and among the magnesium silicate blocks.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the silicon dioxide production sewage treatment system, 3 magnesium silicate treatment tanks are arranged, wherein the 3 magnesium silicate treatment tanks are a magnesium silicate primary slow-release tank, a magnesium silicate secondary slow-release tank and a magnesium silicate tertiary slow-release tank in sequence.
The technical problem to be solved by the invention can be further solved by the following technical scheme that for the above-mentioned silicon dioxide production sewage treatment system, the system further comprises a filtering device for recycling water in the third sedimentation tank, the filtering device comprises a plurality of filtering tanks for processing water in the third sedimentation tank and a water pump for supplying water to the filtering tanks, and the water pump is arranged in the third sedimentation tank.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the silicon dioxide production sewage treatment system, 4 filter tanks are arranged, and the 4 filter tanks sequentially comprise a first-stage high-pressure filter tank, a second-stage activated alumina filter tank, a third-stage high-pressure filter tank and a fourth-stage high-pressure filter tank.
The technical problem to be solved by the invention can be further solved by adopting the following technical scheme that for the silicon dioxide production sewage treatment system, the quick neutralization channel is communicated with the top of the calcium carbonate slow-release tank, the bottom of the calcium carbonate slow-release tank is communicated with the bottom of the first sedimentation tank, the top of the first sedimentation tank is communicated with the top of the magnesium silicate pre-slow-release tank, the bottom of the magnesium silicate pre-slow-release tank is communicated with the bottom of the second sedimentation tank, the top of the second sedimentation tank is communicated with the top of the magnesium silicate treatment tank, the bottom of the magnesium silicate treatment tank is communicated with the bottom of the third sedimentation tank, and the bottoms of the adjacent magnesium silicate treatment tanks are communicated with each other.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the silicon dioxide production sewage treatment system, the calcium carbonate blocks are blocky limestone, and the magnesium silicate blocks are blocky silicate minerals containing magnesium silicate.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the silicon dioxide production sewage treatment system, the system also comprises a water quality on-line monitoring system for monitoring the water in the third sedimentation tank in real time.
The technical problem to be solved by the invention can be further realized by the following technical scheme, and for the above silicon dioxide production sewage treatment system, a silicon dioxide production sewage treatment method comprises the following steps:
the method comprises the steps of firstly treating the silicon dioxide production sewage through calcium carbonate to remove acid radical ions in the sewage, then treating the silicon dioxide production sewage through magnesium silicate to remove fluorine ions in the sewage, finally filtering the treated sewage through a filtering device, and outputting the filtered water to the outside for recycling.
The technical problem to be solved by the invention can be further realized by the following technical scheme, and the method for treating the silicon dioxide production sewage comprises the following steps:
(1) continuously discharging the discharged silicon dioxide production sewage into a rapid neutralization channel, and rapidly neutralizing acid radical ions in the sewage and calcium carbonate in the rapid neutralization channel in the process of flowing the sewage in the rapid neutralization channel;
(2) continuously flowing the sewage subjected to rapid neutralization treatment into a calcium carbonate slow-release tank, further reacting acid radical ions in the sewage with calcium carbonate in the calcium carbonate slow-release tank, continuously flowing the sewage subjected to reaction into a first sedimentation tank, and carrying out sedimentation separation on precipitates generated by the reaction in the sewage in the first sedimentation tank;
(3) overflowing the sewage settled in the first settling tank into a magnesium silicate pre-sustained release tank, reacting fluoride ions in the sewage with magnesium silicate in the magnesium silicate pre-sustained release tank, continuously flowing the sewage after reaction into a second settling tank, and settling and separating precipitates generated by the reaction in the sewage in the second settling tank;
(4) overflowing the sewage settled in the second settling tank into a magnesium silicate treatment tank, further reacting fluorine ions in the sewage with magnesium silicate in the magnesium silicate treatment tank, continuously flowing the sewage after reaction into a third settling tank, and settling and separating precipitates generated by the reaction in the sewage in the third settling tank;
(5) and filtering the water in the third sedimentation tank by using a filtering device to obtain purified water, and outputting the purified water outwards for recycling.
Compared with the prior art, the method has the advantages that calcium carbonate in the rapid neutralization channel and the silicon dioxide production sewage are subjected to neutralization reaction to rapidly neutralize acid radical ions in the sewage, and then the calcium carbonate in the calcium carbonate slow-release tank is utilized to further neutralize the acid radical ions in the sewage so as to possibly remove the acid radical ions in the sewage, so that the acid radical ions of the treated sewage meet the standard; then, the magnesium silicate is utilized to treat the fluoride ions in the sewage treated by the calcium carbonate, and the treatment modes of slow release, sedimentation, slow release and re-sedimentation are adopted, so that the fluoride ions of the treated sewage meet the standard, and the sewage treated by the method meets the discharge standard; secondly, this application still sets up filter equipment behind the third sedimentation tank to in filter the water after handling, realize recycling, both practiced thrift the environmental protection, reduce cost again. The system has reasonable design, simple use, convenience and effectiveness, can ensure that the silicon dioxide production sewage reaches the discharge standard through the two-step treatment of calcium carbonate and magnesium silicate, can be recycled and reused, and effectively solves the problem of treating the silicon dioxide production sewage.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a silicon dioxide production sewage treatment system comprises a rapid neutralization channel 3, a calcium carbonate slow-release tank 4, a first sedimentation tank 5, a magnesium silicate pre-slow-release tank 6, a second sedimentation tank 7, a plurality of magnesium silicate treatment tanks and a third sedimentation tank 11 which are sequentially communicated, wherein calcium carbonate blocks 12 for removing acid radical ions in silicon dioxide production sewage are respectively contained in the rapid neutralization channel 3 and the calcium carbonate slow-release tank 4, magnesium silicate blocks 13 for removing fluorine ions in the silicon dioxide production sewage are respectively contained in the magnesium silicate pre-slow-release tank 6 and each magnesium silicate treatment tank 8, and flowing water gaps which are convenient for the silicon dioxide production sewage to flow are respectively reserved between the calcium carbonate blocks 12 and between the magnesium silicate blocks 13. One end of the rapid neutralization channel 3 is communicated with a calcium carbonate slow-release tank 4, the other end is communicated with a buffer tank 2 which is used for being matched with an external silicon dioxide production sewage drainage pipeline 1 and is used for containing discharged sewage, calcium carbonate blocks 12 are filled in the rapid neutralization channel 3 and the calcium carbonate slow-release tank 4 to ensure that sufficient calcium carbonate is provided, magnesium silicate blocks 13 are filled in the magnesium silicate pre-slow-release tank 6 and the magnesium silicate treatment tank 8 to ensure that sufficient magnesium silicate is provided, so that the sewage entering the buffer tank 2 continuously flows outwards, sequentially flows through the rapid neutralization channel 3, the calcium carbonate slow-release tank 4, the first settling tank 5, the magnesium silicate pre-slow-release tank 6, the second settling tank 7 and the magnesium silicate treatment tank 8, and finally enters a third settling tank 11, acid radical ions in the sewage react with calcium carbonate in the flowing process of the sewage, fluorine ions in the sewage react with magnesium silicate, and dynamic treatment of the sewage is realized, not only ensures the treatment effect, but also improves the treatment efficiency;
the sizes of the calcium carbonate slow-release tank 4, the first sedimentation tank 5, the magnesium silicate pre-slow-release tank 6, the second sedimentation tank 7, the magnesium silicate treatment tanks and the third sedimentation tank 11 are determined according to the daily sewage discharge amount and the required sewage retention time, and the system is generally adopted to require sewage to be retained for about two days, so that if 200 cubic meters of sewage is discharged every day, the total volume of the calcium carbonate slow-release tank 4, the first sedimentation tank 5, the magnesium silicate pre-slow-release tank 6, the second sedimentation tank 7, the magnesium silicate treatment tanks and the third sedimentation tank 11 is 400 cubic meters, specifically, the volume sum of the calcium carbonate slow-release tank 4 and the first sedimentation tank 5 is 200 cubic meters, and the volume sum of the magnesium silicate pre-slow-release tank 6, the second sedimentation tank 7, the magnesium silicate treatment tanks and the third sedimentation tank 11 is 200 cubic meters, so that the sewage treatment time can be ensured; of course, corresponding adjustment can be carried out according to the actual sewage treatment effect, and the method is not limited to the data listed in the application;
the calcium carbonate slow-release tank 4, the first sedimentation tank 5, the magnesium silicate pre-slow-release tank 6, the second sedimentation tank 7, the magnesium silicate treatment tanks and the third sedimentation tank 11 are formed by separating a cuboid tank, the structure is compact, the occupied area is reduced, and the arrangement is convenient.
The magnesium silicate treatment pool 8 is provided with 3 magnesium silicate treatment pools 8, wherein the 3 magnesium silicate treatment pools 8 are a magnesium silicate primary slow-release pool 8, a magnesium silicate secondary slow-release pool 9 and a magnesium silicate tertiary slow-release pool 10 in sequence. The 3 magnesium silicate treatment tanks 8 are communicated with each other and are used for sequentially carrying out three times of treatment on magnesium silicate through magnesium silicate contained in the tanks, so that the magnesium silicate can fully react with fluoride ions in the sewage to remove the fluoride ions in the sewage to the maximum extent; in practice, the number of magnesium silicate treatment tanks 8 can be adjusted according to the effect of sewage treatment, and can be increased or decreased as appropriate.
The system also comprises a filtering device for recycling the water in the third sedimentation tank 11, the filtering device comprises a plurality of filtering tanks for treating the water in the third sedimentation tank 11 and a water pump 14 for supplying water to the filtering tanks, and the water pump 14 is arranged in the third sedimentation tank 11. The water in the third sedimentation tank 11 reaches the discharge standard, the ppm concentration is less than 1ppm, and a filtering device is added for further filtering the water, so that the treated water can be recycled, the zero discharge is great, the energy is saved, the environment is protected, and the cost is reduced.
The filter tank is provided with 4, and 4 filter tanks are one-level high-pressure filter tank 15, second grade active alumina filter tank 16, tertiary high-pressure filter tank 17 and level four high-pressure filter tank 18 in proper order. The first-stage high-pressure filter tank 15, the third-stage high-pressure filter tank 17 and the fourth-stage high-pressure filter tank 18 are all filter tanks in the prior art, layered anthracite, sand, finely-divided garnet or other materials are used as a bed layer, the top layer of the bed is composed of lightest and coarsest grade materials, and the heaviest and finest grade materials are placed at the bottom of the bed, and the principle of the method is that filtering is carried out according to depth, namely, larger particles in water are removed at the top layer, and smaller particles are removed at a deeper part of a filter medium, so that the SDI value of the water is reduced, the requirement of deep purification on the water quality is met, and the equipment has the advantages of low manufacturing cost, low operating cost and simple operation; the filter material can be used for many times after backwashing, and has long service life; the secondary activated alumina filtering tank 16 is an activated alumina filtering tank in the prior art, and is mainly used for removing fluorine by using activated alumina; the treated water is filtered for four times through a first-stage high-pressure filtering tank 15, a second-stage activated alumina filtering tank 16, a third-stage high-pressure filtering tank 17 and a fourth-stage high-pressure filtering tank 18, so that the water quality is ensured to be greatly standard, and the water can be recycled.
The rapid neutralization channel 3 is communicated with the top of the calcium carbonate slow-release pool 4, the rapid neutralization channel 3 has a certain inclination angle, the inclination angle is about 15 degrees, so that sewage entering the rapid neutralization channel 3 can automatically flow to the calcium carbonate slow-release pool 4, the bottom of the calcium carbonate slow-release pool 4 is communicated with the bottom of the first sedimentation pool 5, and the sewage entering the calcium carbonate slow-release pool 4 is reacted with calcium carbonate and then enters the first sedimentation pool 5 for sedimentation, and the reaction and the sedimentation are carried out simultaneously; the top of the first sedimentation tank 5 is communicated with the top of the magnesium silicate pre-sustained release tank 6, so that sewage in the first sedimentation tank 5 can enter the magnesium silicate pre-sustained release tank 6 only by overflowing, and sediments generated by reaction are prevented from entering the magnesium silicate pre-sustained release tank 6; the bottom of the magnesium silicate pre-slow release pool 6 is communicated with the bottom of the second sedimentation pool 7, so that sewage and magnesium silicate react and settle at the same time, and the reaction efficiency is improved; the top of the second sedimentation tank 7 is communicated with the top of the magnesium silicate treatment tank 8, so that sewage in the second sedimentation tank 7 can enter the magnesium silicate treatment tank 8 only by overflowing, and sediments generated by reaction are prevented from entering the magnesium silicate treatment tank 8; the bottom of the magnesium silicate treatment tank 8 is communicated with the bottom of the third sedimentation tank 11, and the bottoms of the adjacent magnesium silicate treatment tanks 8 are communicated with each other, so that the sewage entering the magnesium silicate treatment tank 8 can react with the magnesium silicate again, and the reacted sewage is settled in the third sedimentation tank 11.
The calcium carbonate blocks 12 are blocky limestone, and the magnesium silicate blocks 13 are blocky silicate minerals containing magnesium silicate, so that the cost is low, the service life is long, and the replacement and the cleaning are convenient; the main component of the limestone is calcium carbonate which is common, and the calcium carbonate is improved by adopting the massive limestone, so that the limestone is convenient to replace and clean; the magnesium silicate is low in natural content and generally exists in a large amount of silicate minerals, so that the magnesium silicate is provided by the silicate minerals, and the method is simple and convenient and is convenient to replace and clean.
The system also comprises an online water quality monitoring system 19 for monitoring the water in the third sedimentation tank 11 in real time. The water quality on-line monitoring system 19 is a water quality on-line monitoring system 19 in the prior art, is a set of comprehensive on-line automatic monitoring system which takes an on-line automatic analyzer as a core, applies the modern sensing technology, the automatic measurement technology, the automatic control technology, the computer application technology, the related special analysis software and the communication network, is used for monitoring the water in the third sedimentation tank 11 in real time, has main monitoring parameters of COD, ppm and pH value, and is convenient for checking whether the sewage is qualified in treatment and can be discharged or recycled according to the water quality on-line monitoring system 19; if the water quality is qualified, the system can be adjusted according to unqualified parameters.
A method for treating silicon dioxide production sewage comprises the following steps:
the method comprises the steps of firstly treating the silicon dioxide production sewage through calcium carbonate to remove acid radical ions in the sewage, then treating the silicon dioxide production sewage through magnesium silicate to remove fluorine ions in the sewage, finally filtering the treated sewage through a filtering device, and outputting the filtered water to the outside for recycling.
The method comprises the following steps:
(1) continuously discharging the discharged silicon dioxide production sewage into a rapid neutralization channel, and rapidly neutralizing acid radical ions in the sewage and calcium carbonate in the rapid neutralization channel in the process of flowing the sewage in the rapid neutralization channel;
(2) continuously flowing the sewage subjected to rapid neutralization treatment into a calcium carbonate slow-release tank, further reacting acid radical ions in the sewage with calcium carbonate in the calcium carbonate slow-release tank, continuously flowing the sewage subjected to reaction into a first sedimentation tank, and carrying out sedimentation separation on precipitates generated by the reaction in the sewage in the first sedimentation tank;
(3) overflowing the sewage settled in the first settling tank into a magnesium silicate pre-sustained release tank, reacting fluoride ions in the sewage with magnesium silicate in the magnesium silicate pre-sustained release tank, continuously flowing the sewage after reaction into a second settling tank, and settling and separating precipitates generated by the reaction in the sewage in the second settling tank;
(4) overflowing the sewage settled in the second settling tank into a magnesium silicate treatment tank, further reacting fluorine ions in the sewage with magnesium silicate in the magnesium silicate treatment tank, continuously flowing the sewage after reaction into a third settling tank, and settling and separating precipitates generated by the reaction in the sewage in the third settling tank;
(5) and filtering the water in the third sedimentation tank by using a filtering device to obtain purified water, and outputting the purified water outwards for recycling.
The innovation of the application is as follows:
1. acid radical ions in the production sewage of the silicon dioxide treated by the calcium carbonate and fluoride ions in the production sewage of the silicon dioxide treated by the magnesium silicate are utilized, and the calcium carbonate and the magnesium silicate are insoluble in water and can be added in large quantities without considering the problems of insufficient or redundant addition of the calcium carbonate and the magnesium silicate;
2. calcium carbonate is provided by calcium carbonate blocks, magnesium silicate is provided by magnesium silicate blocks, and flowing water gaps which are convenient for flowing of silicon dioxide production sewage are formed between the calcium carbonate blocks and between the magnesium silicate blocks, so that the flowing of the sewage is not influenced, and the calcium carbonate blocks and the magnesium silicate blocks can react with acid radical ions and fluorine ions in the sewage to realize dynamic sewage treatment;
3. the rapid neutralization channel is arranged, so that rapid neutralization is performed in the sewage discharge process, and the sewage treatment efficiency is improved.
Claims (9)
1. The utility model provides a silicon dioxide production sewage treatment system which characterized in that: the system comprises a rapid neutralization channel, a calcium carbonate slow-release pool, a first sedimentation pool, a magnesium silicate pre-slow-release pool, a second sedimentation pool, a plurality of magnesium silicate treatment pools and a third sedimentation pool which are sequentially communicated, wherein calcium carbonate blocks for removing acid radical ions in the silicon dioxide production sewage are respectively contained in the rapid neutralization channel and the calcium silicate slow-release pool, magnesium silicate blocks for removing fluorine ions in the silicon dioxide production sewage are respectively contained in the magnesium silicate pre-slow-release pool and each magnesium silicate treatment pool, and flowing water gaps which are convenient for the silicon dioxide production sewage to flow are respectively reserved between the calcium carbonate blocks and between the magnesium silicate blocks.
2. The silica production wastewater treatment system according to claim 1, wherein: the magnesium silicate treatment pool is provided with 3 magnesium silicate treatment pools, wherein the 3 magnesium silicate treatment pools are a magnesium silicate primary slow-release pool, a magnesium silicate secondary slow-release pool and a magnesium silicate tertiary slow-release pool in sequence.
3. The silica production wastewater treatment system according to claim 1, wherein: the system also comprises a filtering device for recycling the water in the third sedimentation tank, wherein the filtering device comprises a plurality of filtering tanks for processing the water in the third sedimentation tank and a water pump for supplying water to the filtering tanks, and the water pump is arranged in the third sedimentation tank.
4. The silica production wastewater treatment system according to claim 3, wherein: the filtration jar is provided with 4, and 4 filter the jar and be one-level high pressure filtration jar, second grade active alumina filter jar, tertiary high pressure filtration jar and level four high pressure filtration jar in proper order.
5. The silica production wastewater treatment system according to claim 1, wherein: the rapid neutralization channel is communicated with the top of the calcium carbonate slow-release pool, the bottom of the calcium carbonate slow-release pool is communicated with the bottom of the first sedimentation pool, the top of the first sedimentation pool is communicated with the top of the magnesium silicate pre-slow-release pool, the bottom of the magnesium silicate pre-slow-release pool is communicated with the bottom of the second sedimentation pool, the top of the second sedimentation pool is communicated with the top of the magnesium silicate treatment pool, the bottom of the magnesium silicate treatment pool is communicated with the bottom of the third sedimentation pool, and the bottoms of the adjacent magnesium silicate treatment pools are communicated with each other.
6. The silica production wastewater treatment system according to claim 1, wherein: the calcium carbonate blocks are blocky limestone, and the magnesium silicate blocks are blocky silicate minerals containing magnesium silicate.
7. The silica production wastewater treatment system according to claim 1, wherein: the system also comprises a water quality on-line monitoring system for monitoring the water in the third sedimentation tank in real time.
8. A method for treating silicon dioxide production sewage is characterized by comprising the following steps: the method uses the silicon dioxide production sewage treatment system of any one of claims 1 to 7, and comprises the following processes:
the method comprises the steps of firstly treating the silicon dioxide production sewage through calcium carbonate to remove acid radical ions in the sewage, then treating the silicon dioxide production sewage through magnesium silicate to remove fluorine ions in the sewage, finally filtering the treated sewage through a filtering device, and outputting the filtered water to the outside for recycling.
9. The silica production wastewater treatment system according to claim 8, wherein: the method comprises the following steps:
(1) continuously discharging the discharged silicon dioxide production sewage into a rapid neutralization channel, and rapidly neutralizing acid radical ions in the sewage and calcium carbonate in the rapid neutralization channel in the process of flowing the sewage in the rapid neutralization channel;
(2) continuously flowing the sewage subjected to rapid neutralization treatment into a calcium carbonate slow-release tank, further reacting acid radical ions in the sewage with calcium carbonate in the calcium carbonate slow-release tank, continuously flowing the sewage subjected to reaction into a first sedimentation tank, and carrying out sedimentation separation on precipitates generated by the reaction in the sewage in the first sedimentation tank;
(3) overflowing the sewage settled in the first settling tank into a magnesium silicate pre-sustained release tank, reacting fluoride ions in the sewage with magnesium silicate in the magnesium silicate pre-sustained release tank, continuously flowing the sewage after reaction into a second settling tank, and settling and separating precipitates generated by the reaction in the sewage in the second settling tank;
(4) overflowing the sewage settled in the second settling tank into a magnesium silicate treatment tank, further reacting fluorine ions in the sewage with magnesium silicate in the magnesium silicate treatment tank, continuously flowing the sewage after reaction into a third settling tank, and settling and separating precipitates generated by the reaction in the sewage in the third settling tank;
(5) and filtering the water in the third sedimentation tank by using a filtering device to obtain purified water, and outputting the purified water outwards for recycling.
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