CN112723567A - Rapid clarification device and method for white carbon black production wastewater by precipitation method - Google Patents
Rapid clarification device and method for white carbon black production wastewater by precipitation method Download PDFInfo
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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
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- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
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- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention discloses a device for quickly clarifying white carbon black production wastewater by a precipitation method, which comprises a cylindrical device body, wherein a clarifying agent liquid inlet pipe, a waste liquid inlet pipe and a quick-setting liquid outlet pipe are arranged on the device body, the clarifying agent liquid inlet pipe and the quick-setting liquid outlet pipe are respectively arranged at the top and the bottom of the device body, the waste liquid inlet pipe is arranged at one side of the device body, the central axis of the clarifying agent liquid inlet pipe is coincided with the central axis of the device body, and the central axis of the waste liquid inlet pipe is vertical to the central axis of the device body. The device disclosed by the invention has the advantages of simple structure, convenience in operation, equipment investment saving, production energy consumption reduction, high efficiency in waste liquid treatment, excellent effect and low cost, realizes rapid aggregation and agglomeration between basic white carbon black particles and hydroxyl groups of basic white carbon black particles of a clarifier, and increases the opportunity of contact and collision between the clarifier and suspended particles containing white carbon black.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a device and a method for quickly clarifying wastewater produced by precipitated white carbon black.
Background
In the production process of white carbon black by precipitation method, the core reaction is usually carried out by hydrochloric acid or sulfuric acid and sodium silicatePerforming neutralization reaction, wherein white carbon black (SiO) exists in a mixed system after the reaction is finished2·nH2O hydrated silica), sodium chloride (NaCl in the hydrochloric acid process) or sodium sulfate (Na in the sulfuric acid process)2SO4) And process water (H)2O). Carrying out solid-liquid separation on the mixed system by using solid-liquid separation equipment to obtain a filtrate (mother liquor) and a filter cake, wherein the filtrate contains the following substances: trace white carbon black with a content of about 130mg/L, sodium chloride with a content of about 50-70g/L, or sodium sulfate with a content of about 60-90 g/L.
The filter cake contains white carbon black and trace sodium chloride with content of about 0.25%, or sodium sulfate with content of about 0.3%, and the balance of process water. And washing the filter cake with clear water (industrial water), wherein the components in the washed filter cake comprise white carbon black and process water, and conveying the water-containing white carbon black filter cake to continue pulping, spray drying, dry powder collecting, metering and packaging to obtain a white carbon black product.
The washed salt-containing (5 g/L sodium chloride, 20mg/L white carbon black or 6g/L sodium sulfate and 20mg/L white carbon black) washing water and the filtrate generated by the previous filtering unit form production wastewater, and the production wastewater is discharged after reaching the standard or recycled to obtain mirabilite or sodium chloride and industrial-grade process water after being recycled; or, obtaining sulfuric acid, caustic soda or sodium chloride and industrial-grade process water; or hydrochloric acid, caustic soda and industrial grade process water.
The traditional method is that the filtered filtrate is directly conveyed to an evaporation concentration system, sodium sulfate is crystallized out through supersaturation, condensed water is discharged, and salt-containing (sodium chloride or sodium sulfate) washing water is directly discharged.
The problems of the method in the treatment process are as follows: firstly, directly sending the mother liquor to evaporation concentration, wherein the salt concentration (5-7% of sodium chloride or 6-9% of sodium sulfate) is too low, the steam consumption of evaporation concentration is huge, and the sale price of the obtained sodium sulfate product is less than the concentration cost, so that the loss is caused; secondly, the mother liquor contains 130mg/L of white carbon black, pipelines in the evaporator are easily blocked after the mother liquor is sent into an evaporation concentration system, and an evaporation concentration heater needs to be replaced or maintained after the mother liquor is used for a period of time, so that the use cost is increased, and the use efficiency is reduced. The salt content in the washing water is lower, and the production enterprises can only directly discharge the washing water, so that the discharged wastewater cannot reach the standard.
Disclosure of Invention
Aiming at the problems, the invention provides a device and a method for quickly clarifying white carbon black production wastewater by a precipitation method, which have the advantages of simple structure, convenient operation, safe use, investment saving, lower production energy consumption and the like, can quickly and efficiently precipitate and recover white carbon black in filtrate, reduce the use cost and enable the discharge of the wastewater to meet the requirements.
The technical scheme of the invention is as follows:
the utility model provides a quick clarification device of white carbon black waste water of precipitation method, is including being cylindric device body, be equipped with clarifier feed liquor pipe, waste liquid inlet pipe and rapid hardening liquid drain pipe on the device body, the top and the bottom of device body are located respectively to clarifier feed liquor pipe and rapid hardening liquid drain pipe, one side of device body is located to the waste liquid inlet pipe, the central axis of clarifier feed liquor pipe coincides with the central axis of device body, the central axis of waste liquid inlet pipe is perpendicular with the central axis of device body.
In a further technical scheme, the clarifying agent liquid inlet pipe is a conical pipe, the large-caliber end of the clarifying agent liquid inlet pipe extends into the device body, one end of the clarifying agent liquid inlet pipe extending into the device body is provided with a spherical crown-shaped liquid spraying surface, and the liquid spraying surface is provided with a plurality of nozzles.
In a further technical scheme, a plurality of nozzles are arranged on the same circumference, the included angle between the central axis of each nozzle and the central axis of a clarifying agent liquid inlet pipe is 36 degrees, the inner diameter of each nozzle is 4.2 unit lengths, the height difference between the central axes of the liquid spraying surface and the waste liquid inlet pipe is 350 unit lengths, and the inner diameter of the device body is 300 unit lengths.
In a further technical scheme, the waste liquid inlet pipe is the loudspeaker form, the big aperture end and the this body coupling of device of waste liquid inlet pipe, the extending direction of the central axis of waste liquid inlet pipe is the same with the tangential of device body, and the cross-section is asymmetric ellipsoid.
The working principle of the technical scheme is as follows:
the waste liquid containing white carbon black particles enters a special structure of a waste liquid feeding pipe on the device body, and a clarifying agent enters a nozzle on a spherical-crown-shaped liquid spraying surface through a conical pipe, formed clarifying agent microbeads are uniformly distributed on the cross section of the whole device body and are mixed with the waste liquid containing the white carbon black particles in the device body, the mixed liquid forms shear flow and turbulent flow, so that the white carbon black particles and basic particles of the clarifying agent have sufficient opportunity to collide at high speed, the white carbon black particles are agglomerated and then flow into a collecting tank from the device body to be rapidly settled, solid-liquid separation is carried out by using a plate-and-frame filter press, filtrate, namely sodium sulfate (or sodium chloride) saline water without white carbon black suspended matters enters a next production unit for concentration, and filter cakes are white carbon black waste residues which are sent to a brick.
The device disclosed by the invention has the advantages of simple structure, convenience in operation, equipment investment saving, production energy consumption reduction, high efficiency in waste liquid treatment, excellent effect and low cost, realizes rapid aggregation and agglomeration between basic white carbon black particles and hydroxyl groups of basic white carbon black particles of a clarifier, and increases the opportunity of contact and collision between the clarifier and suspended particles containing white carbon black.
The invention also provides a method for quickly clarifying the precipitated white carbon black production wastewater by applying the device, which adopts the technical scheme as follows:
a method for quickly clarifying wastewater produced by precipitated silica white comprises the following steps:
s1, directly conveying the salt-containing mother liquor filtered from the solid-liquid separation filter press to a precipitation-process white carbon black production wastewater rapid clarification device by a conveying pump after the white carbon black production neutralization reaction;
s2, conveying the prepared clarifying agent to a precipitation-process white carbon black production wastewater rapid clarifying device through a metering pump, and rapidly settling the white carbon black in the salt-containing mother liquor;
and S3, after 30 minutes, observing that the water in the wastewater tank is obviously layered in color, the upper part is clear and transparent, the lower part is precipitated and whitened, after 1 hour, starting a filter press delivery pump, delivering the precipitated wastewater to a plate-and-frame filter press for filter pressing and separation, wherein a filter cake and other silicon-containing waste residues generated in the production process of the white carbon black are delivered to a brick making factory for brick making, the filtrate is delivered to a first-stage reverse osmosis stage and a second-stage reverse osmosis stage for further desalination and concentration, and the first-stage reverse osmosis concentrated water and the second-stage reverse osmosis concentrated water are returned as process water to be recycled to.
S4, concentrating sodium sulfate into 150g/L by using the electrodialysis concentrated solution, performing electrodialysis by using a bipolar membrane to obtain sulfuric acid and sodium hydroxide, returning the dilute brine of the bipolar membrane to the electrodialysis system, reusing the sulfuric acid in the production system, selling the sodium hydroxide, and returning clear water to the production system or discharging the clear water.
In a further embodiment, in step S2, the fining agent is a 2.8% aluminum-iron-phosphate-containing liquid formulated from an aluminum-iron-phosphate fining agent.
The invention utilizes silanol bonds and hydrogen bond bonding force on the basic particle structure of the white carbon black, the selected clarifying agent is ferric aluminum phosphate, the higher polymerization capacity of hydroxylation of the clarifying agent has a bridging function, the white carbon black particles are agglomerated together, the white carbon black agglomerates are adsorbed into agglomerates, and the suspended white carbon black particles are agglomerated, adsorbed into agglomerates and settled down.
The invention has the beneficial effects that:
1. the device disclosed by the invention has the advantages that the structure is simple, the operation is convenient, the equipment investment is saved, the production energy consumption is reduced, the rapid aggregation and agglomeration between the basic white carbon black particles and the hydroxyl groups of the basic white carbon black particles are realized, the contact collision chance between the clarifying agent and the suspended particles containing the white carbon black is increased, the waste liquid treatment capacity is high, the effect is excellent, and the cost is low;
2. the invention utilizes silanol bonds and hydrogen bond bonding force on the basic particle structure of the white carbon black, the selected clarifying agent is ferric aluminum phosphate, the higher polymerization capacity of hydroxylation of the clarifying agent has a bridging function, the white carbon black particles are agglomerated together, the white carbon black agglomerates are adsorbed into agglomerates, and the suspended white carbon black particles are agglomerated, adsorbed into agglomerates and settled down.
Drawings
FIG. 1 is a schematic structural diagram of a device for rapidly clarifying wastewater from precipitated silica production according to an embodiment of the present invention.
Description of reference numerals:
10. a device body; 20. a clarifier feed liquor pipe; 30. a waste liquid feeding pipe; 40. and a quick-setting liquid outlet pipe.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
Example (b):
as shown in figure 1, a quick clarification device of white carbon black waste water of precipitation method, including being cylindric device body 10, be equipped with clarifier feed liquor pipe 20 on the device body 10, waste liquid inlet pipe 30 and rapid hardening liquid drain pipe 40, the top and the bottom of device body 10 are located respectively to clarifier feed liquor pipe 20 and rapid hardening liquid drain pipe 40, one side of device body 10 is located to waste liquid inlet pipe 30, the central axis of clarifier feed liquor pipe 20 and the central axis coincidence of device body 10, the central axis of waste liquid inlet pipe 30 is perpendicular with the central axis of device body 10.
In another embodiment, as shown in fig. 1, the clarifier inlet pipe 20 is a conical pipe, the large-caliber end of the clarifier inlet pipe 20 extends into the apparatus body 10, the end of the clarifier inlet pipe 20 extending into the apparatus body 10 is provided with a spherical-crown-shaped liquid spraying surface, and the liquid spraying surface is provided with a plurality of nozzles.
In another embodiment, the nozzles are located on the same circumference, the included angle between the central axis of each nozzle and the central axis of the clarifier liquid inlet pipe 20 is 36 degrees, the inner diameter of each nozzle is 4.2cm, the height difference between the liquid spraying surface and the central axis of the waste liquid inlet pipe 30 is 3.5m, and the inner diameter of the device body 10 is 3m, so that the clarifier liquid beads sprayed from the nozzles can cover the section of the whole device body 10 and cannot collide with the inner wall of the device body 10.
In another embodiment, as shown in fig. 1, the waste liquid feeding pipe 30 is in a shape of a horn, a large-diameter end of the waste liquid feeding pipe 30 is connected to the apparatus body 10, a central axis of the waste liquid feeding pipe 30 extends in the same direction as a tangential direction of the apparatus body 10, and a cross section of the waste liquid feeding pipe is an asymmetric ellipsoid.
The waste liquid containing white carbon black particles enters the special structure of the waste liquid feeding pipe 30 on the device body 10, and the clarifying agent enters the spray nozzle on the spherical-crown-shaped liquid spraying surface through the conical pipe, formed clarifying agent microbeads are uniformly distributed on the cross section of the whole device body 10 and are mixed with the waste liquid containing the white carbon black particles in the device body 10, the mixed liquid forms existing shear flow and turbulent flow, so that the white carbon black particles and basic particles of the clarifying agent have full opportunity to collide at high speed, the white carbon black particles are agglomerated and then flow into the collecting tank from the device body 10 to be rapidly settled, solid-liquid separation is carried out by using a plate-and-frame filter press, filtrate, namely sodium sulfate (or sodium chloride) saline water without white carbon black suspended matters enters a next production unit for concentration, and filter cakes are white carbon black waste residues which are sent.
The device disclosed by the invention has the advantages of simple structure, convenience in operation, equipment investment saving, production energy consumption reduction, high efficiency in waste liquid treatment, excellent effect and low cost, realizes rapid aggregation and agglomeration between basic white carbon black particles and hydroxyl groups of basic white carbon black particles of a clarifier, and increases the opportunity of contact and collision between the clarifier and suspended particles containing white carbon black.
The embodiment also provides a method for quickly clarifying wastewater produced by precipitated silica by using the device, which comprises the following steps:
s1, after the white carbon black is produced and subjected to neutralization reaction, filtering salt-containing mother liquor (or washing water) from a solid-liquid separation filter press by a delivery pump (an anti-corrosion chemical pump with the flow rate of 70 m)3Per hour, the lift is 30m) is directly conveyed to a device for quickly clarifying the wastewater produced by the white carbon black by the precipitation method;
s2, conveying the prepared clarifying agent to a precipitation-process white carbon black production wastewater rapid clarifying device through a metering pump (the flow of the metering pump is 50L/h, and the discharge pressure is 1.5MPa), and rapidly settling the white carbon black in the salt-containing mother liquor;
s3, after 30 minutes, observing water in the wastewater tank, wherein the water is obviously layered in color, the upper part is clear and transparent, the lower part is precipitated and whitened, and after 1 hour, starting a filter press delivery pump (an anti-corrosion pump with the flow rate of 150 m)3Hour, 50m of lift) and conveying the wastewater containing the precipitateAnd (3) conveying the mixture to a plate-and-frame filter press for filter pressing separation, wherein a filter cake and other silicon-containing waste residues generated in the production process of the white carbon black are conveyed to a brick making factory for making bricks, filtrate is conveyed to enter a first-stage reverse osmosis and a second-stage reverse osmosis for further desalting and concentrating, and first-stage reverse osmosis concentrated water and second-stage reverse osmosis concentrated water are returned as process water to be recycled to a white carbon black washing water recycling section.
S4, concentrating sodium sulfate (or sodium chloride) by using the electrodialysis concentrated solution to 150g/L, performing bipolar membrane electrodialysis to obtain sulfuric acid (or hydrochloric acid) and sodium hydroxide, returning the bipolar membrane dilute saline to an electrodialysis system, converting the sodium sulfate into sulfuric acid (98g/L) and sodium hydroxide (80g/L) by using the bipolar membrane electrodialysis, reusing the sulfuric acid in a production system, selling the sodium hydroxide, and returning clear water to the production system or discharging the clear water.
In this example, the fining agent is a 2.8% ferroaluminum phosphate containing liquid formulated from an ferroaluminum phosphate fining agent in a fining agent formulation tank (with stirrer) in step S2.
The invention utilizes silanol bonds and hydrogen bond bonding force on the basic particle structure of the white carbon black, the selected clarifying agent is ferric aluminum phosphate, the higher polymerization capacity of hydroxylation of the clarifying agent has a bridging function, the white carbon black particles are agglomerated together, the white carbon black agglomerates are adsorbed into agglomerates, and the suspended white carbon black particles are agglomerated, adsorbed into agglomerates and settled down.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. The utility model provides a quick clarification device of white carbon black waste water of precipitation method, a serial communication port, including being cylindric device body, be equipped with clarifier feed liquor pipe, waste liquid inlet pipe and rapid hardening liquid drain pipe on the device body, the top and the bottom of device body are located respectively to clarifier feed liquor pipe and rapid hardening liquid drain pipe, one side of device body is located to the waste liquid inlet pipe, the central axis of clarifier feed liquor pipe coincides with the central axis of device body, the central axis of waste liquid inlet pipe is perpendicular with the central axis of device body.
2. The device for quickly clarifying white carbon black production wastewater through precipitation according to claim 1, wherein the clarifier liquid inlet pipe is a conical pipe, the large-caliber end of the clarifier liquid inlet pipe extends into the device body, one end of the clarifier liquid inlet pipe extending into the device body is provided with a spherical crown-shaped liquid spraying surface, and the liquid spraying surface is provided with a plurality of nozzles.
3. The device for rapidly clarifying wastewater produced by precipitated silica according to claim 2, wherein the plurality of nozzles are located on the same circumference, the included angle between the central axis of each nozzle and the central axis of the clarifier liquid inlet pipe is 36 degrees, the inner diameter of each nozzle is 4.2 unit lengths, the height difference between the liquid spraying surface and the central axis of the waste liquid inlet pipe is 350 unit lengths, and the inner diameter of the device body is 300 unit lengths.
4. The device for rapidly clarifying white carbon black production wastewater by precipitation according to claim 1, wherein the waste liquid feeding pipe is horn-shaped, a large-caliber end of the waste liquid feeding pipe is connected with the device body, and the extending direction of the central axis of the waste liquid feeding pipe is the same as the tangential direction of the device body.
5. The method for quickly clarifying the wastewater produced by the precipitated white carbon black is characterized by comprising the following steps of:
s1, directly conveying the salt-containing mother liquor filtered from the solid-liquid separation filter press to a precipitation-process white carbon black production wastewater rapid clarification device by a conveying pump after the white carbon black production neutralization reaction;
s2, conveying the prepared clarifying agent to a precipitation-process white carbon black production wastewater rapid clarifying device through a metering pump, and rapidly settling the white carbon black in the salt-containing mother liquor;
and S3, after 30 minutes, observing that the water in the wastewater tank is obviously layered in color, the upper part is clear and transparent, the lower part is precipitated and whitened, after 1 hour, starting a filter press delivery pump, delivering the precipitated wastewater to a plate-and-frame filter press for filter pressing and separation, wherein a filter cake and other silicon-containing waste residues generated in the production process of the white carbon black are delivered to a brick making factory for brick making, the filtrate is delivered to a first-stage reverse osmosis stage and a second-stage reverse osmosis stage for further desalination and concentration, and the first-stage reverse osmosis concentrated water and the second-stage reverse osmosis concentrated water are returned as process water to be recycled to.
S4, concentrating sodium sulfate into 150g/L by using the electrodialysis concentrated solution, performing electrodialysis by using a bipolar membrane to obtain sulfuric acid and sodium hydroxide, returning the dilute brine of the bipolar membrane to the electrodialysis system, reusing the sulfuric acid in the production system, selling the sodium hydroxide, and returning clear water to the production system or discharging the clear water.
6. The method for rapidly clarifying wastewater produced in white carbon black precipitation according to claim 5, wherein in step S2, the clarifying agent is a 2.8% aluminum-iron-phosphate-containing liquid prepared from an aluminum-iron-phosphate clarifying agent.
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| CN2295519Y (en) * | 1996-11-22 | 1998-10-28 | 高敏 | Water treating apparatus for clarification by self-excition reaction |
| US20080135478A1 (en) * | 2006-12-12 | 2008-06-12 | Otv Sa S.A. | Method for Treating Wastewater or Produced Water |
| CN103539281A (en) * | 2013-02-05 | 2014-01-29 | 金能科技股份有限公司 | White carbon black production wastewater treatment technology |
| CN104724873A (en) * | 2015-03-04 | 2015-06-24 | 四川理工学院 | Method for realizing zero discharge and resource utilization of production waste water of white carbon black |
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| CN109437213A (en) * | 2018-12-10 | 2019-03-08 | 四川绿沃创新环保工程有限公司 | A kind of process for reclaiming producing white carbon black using rice hull ash as raw material |
| CN209797631U (en) * | 2019-01-11 | 2019-12-17 | 多氟多（昆明）科技开发有限公司 | white carbon black waste liquid sedimentation separation device adopting precipitation method |
| CN111635060A (en) * | 2020-04-30 | 2020-09-08 | 安徽进化硅纳米材料科技有限公司 | Method and device for treating silicon dioxide production wastewater |
-
2020
- 2020-12-28 CN CN202011584682.7A patent/CN112723567A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2295519Y (en) * | 1996-11-22 | 1998-10-28 | 高敏 | Water treating apparatus for clarification by self-excition reaction |
| US20080135478A1 (en) * | 2006-12-12 | 2008-06-12 | Otv Sa S.A. | Method for Treating Wastewater or Produced Water |
| CN103539281A (en) * | 2013-02-05 | 2014-01-29 | 金能科技股份有限公司 | White carbon black production wastewater treatment technology |
| CN104724873A (en) * | 2015-03-04 | 2015-06-24 | 四川理工学院 | Method for realizing zero discharge and resource utilization of production waste water of white carbon black |
| CN108744614A (en) * | 2018-06-08 | 2018-11-06 | 南京易洁环保科技有限公司 | A kind of vertical sedimentation basin of industrial organic waste water |
| CN109437213A (en) * | 2018-12-10 | 2019-03-08 | 四川绿沃创新环保工程有限公司 | A kind of process for reclaiming producing white carbon black using rice hull ash as raw material |
| CN209797631U (en) * | 2019-01-11 | 2019-12-17 | 多氟多（昆明）科技开发有限公司 | white carbon black waste liquid sedimentation separation device adopting precipitation method |
| CN111635060A (en) * | 2020-04-30 | 2020-09-08 | 安徽进化硅纳米材料科技有限公司 | Method and device for treating silicon dioxide production wastewater |
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Application publication date: 20210430 |