CN217230415U

CN217230415U - Kaolin acid wastewater treatment system

Info

Publication number: CN217230415U
Application number: CN202123305935.5U
Authority: CN
Inventors: 代滇; 王志国; 李坤; 代雷孟; 陈帝龙; 梁锡治; 吴国豪
Original assignee: China Africa Kaolin Maoming New Material Co ltd
Current assignee: China Africa Kaolin Maoming New Material Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-08-19
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses a kaolin acid wastewater treatment system, with kaolin acid wastewater through oil interceptor and grit chamber detach the oil and the large granule residue that mechanical equipment carried after, through reaction tank, sedimentation tank, clean water basin in proper order, the high-efficient full salt content that reduces kaolin acid wastewater fast obtains the water that can produce the retrieval and utilization. Activated carbon feeder and CaO feeder are installed to the top of reaction tank, and waste water after the reaction of reaction tank carries to the sedimentation tank, so can conveniently throw activated carbon and quick lime, and CaO and the synergism of activated carbon in the reaction process for the reaction is high-efficient and need not to set up the flocculation and precipitation, does not add PAM and PAC, and reduction technology reduces the waste residue treatment capacity, and the water after the processing is used for producing reducible influence to the ecological environment again.

Description

Kaolin acid wastewater treatment system

Technical Field

The utility model relates to a waste water treatment technical field especially relates to a kaolin acid wastewater treatment system.

Background

Along with the gradual realization of overall health, the quality of the living environment of people is more emphasized, and the development of industry and the speed of urbanization make China face a very severe water pollution situation. Kaolin ore dressing is used in the traditional ore dressing manufacturing industry, a large amount of acidic wastewater is generated in the production process, and the main pollutants in the acidic wastewater are pH and Fe ²⁺ SS and chroma. The traditional acidic wastewater treatment method adopts a neutralization precipitation method that quicklime is used as a neutralizer for wet addition, the neutralization reaction achieves the best effect when the pH value is 10-11, the stirring is carried out, the oxidation aeration is carried out by air, then a flocculating agent PAM is added, the solid-liquid separation is carried out, and the pH value of the effluent after the reaction is 6-8. The traditional treatment method can just reach the vicinity of a discharge standard line, but the treated water still contains a large amount of anions and cations, has high total salt content, can generate certain influence on the index of a kaolin product when used for production and recycling, and can generate certain destructive influence on the surrounding ecological environment when discharged on site.

For example, chinese patent publication No. CN 110282777 a discloses a method for treating kaolin wastewater, in which the kaolin wastewater is subjected to caustic adjustment with NaOH, and then sequentially subjected to water washing, a microfiltration membrane, a high-pressure RO membrane and a low-pressure NF/RO membrane to obtain an ultrafine kaolin product. The micro-nano membrane, the RO membrane and the NF/RO membrane adopted by the treatment method are easy to block, need to be replaced and maintained regularly, have higher cost and are not beneficial to long-term investment. Also, for example, chinese patent publication No. CN 108793558A discloses a method for treating wastewater from activated carbon production by a phosphoric acid activation method, which comprises the steps of: performing membrane distillation on rinsing wastewater to obtain fresh water and concentrated water, recycling the concentrated water to an activated carbon production process as an activating agent, recycling the fresh water to the activated carbon production process as spray water of a gas washing tower, performing wet oxidation on the waste water of the gas washing tower, adjusting the pH value by adopting CaO, flocculating, filtering, performing biochemical treatment on filtrate, and adsorbing biochemical effluent by using adsorption resin. The treatment system used in cooperation with the process has a complex structure, membrane distillation is adopted, a flocculating agent needs to be added to increase the waste residue treatment capacity, resin biochemical treatment needs to be carried out, the implementation difficulty is high, the operation cost is high, and the membrane distillation adopted by the method is not suitable for treating the kaolin acid wastewater.

Therefore, in order to solve the problems in the prior art, the development of a kaolin acid wastewater treatment technology with simple structure, low investment cost and good sewage treatment effect is urgently needed.

Disclosure of Invention

The utility model aims to avoid the defects in the prior art and provide a kaolin acid wastewater treatment system with simple structure, low investment cost and good sewage treatment effect.

The purpose of the utility model is realized through the following technical scheme:

provides a kaolin acid wastewater treatment system, which comprises an oil separation tank, a grit chamber, a reaction tank, a sedimentation tank, a fan room, a clean water tank and a water outlet metering tank,

the bottom of the oil separation tank is communicated with the grit chamber, the bottom of the oil separation tank is higher than the bottom of the grit chamber, and the acid wastewater in the middle of the oil separation tank is conveyed to the reaction tank;

an activated carbon feeder and a CaO feeder are arranged above the reaction tank, and the wastewater after the reaction in the reaction tank is conveyed to a sedimentation tank;

conveying the clear liquid precipitated in the sedimentation tank to a clear water tank, and discharging and recycling the clear liquid through a water outlet metering tank;

and conveying the sediment precipitated by the grit chamber and the inclined plate to a fan room.

Preferably, the oil separation tank is arranged in a horizontal flow manner.

Preferably, the oil collecting area at the upper end of the oil separation pool is connected with an oil collecting pipe; and the oil scraper is also arranged and pushes the light oil in the oil separation pool to the oil collecting pipe, and the oil outlet end of the oil collecting pipe is communicated with the oil collecting barrel.

Preferably, the bottom of the oil separation tank is connected with the grit chamber, and a communication port is formed in the shared side wall.

Preferably, the reaction cell is equipped with a stirring device.

Preferably, the sedimentation tank is a sloping plate sedimentation tank, a slag discharge hopper is arranged at the bottom of the sloping plate sedimentation tank, and the slag discharge hopper conveys sediments to the fan room through a pipeline.

Preferably, a sludge concentration tank is further arranged, and sludge discharged by the fan room is conveyed to the sludge concentration tank.

Preferably, the sludge concentration tank is arranged in a radial flow manner.

Preferably, the bottom of the sludge concentration tank is provided with a sludge hopper, and the inclination angle of the sludge hopper and the horizontal plane is 80 degrees.

Preferably, a sludge dewatering room is further arranged, and the sludge concentrated by the sludge concentration tank is conveyed to the sludge dewatering room for treatment.

The utility model has the advantages that:

(1) the utility model discloses a kaolin acid wastewater treatment system gets rid of the oil and the large granule residue back that mechanical equipment carried with kaolin acid wastewater through oil interceptor and grit chamber, through reaction tank, sedimentation tank, clean water basin in proper order, and the full salt content of high-efficient quick reduction kaolin acid wastewater obtains the water that can produce the retrieval and utilization.

(2) An activated carbon feeder and a CaO feeder are arranged above the reaction tank, and the wastewater after reaction in the reaction tank is conveyed to a sedimentation tank, so that the activated carbon and the quicklime can be conveniently added. Activated carbon and quicklime (CaO) are added into the reaction tank in a dry method, the acidic wastewater can carry out secondary activation on the activated carbon, dredge the micro-mesoporous structure of the activated carbon, increase the pore volume and the specific surface area and improve the pollutant adsorption capacity of the activated carbon. And when the activated carbon completely reacts with the wastewater, adding CaO by a dry method, reacting the CaO with water to release a large amount of heat energy to activate the activated carbon for three times, and promoting the forward reaction by the heat generated by the reaction. CaReaction of O with water to form Ca (OH) ₂ Then a sedimentation tank is arranged to flow to the clear water tank for water outlet, and the total salt content is rapidly reduced from 4500-6000ppm to 200-500 ppm. The synergistic effect of CaO and active carbon in the reaction process ensures that the reaction is fast and efficient. And flocculation precipitation is not needed to be arranged, PAM and PAC are not added, the process is reduced, the waste residue treatment capacity is reduced, and the influence on the ecological environment can be reduced by reusing the treated water for production.

(3) The sediment settled in the grit chamber and the inclined plate is conveyed to a fan room, and the sludge treated in the fan room can be directly or further concentrated and dehydrated to be made into a sludge block serving as a raw material in other fields, such as planting nutrient soil and the like.

Drawings

The present invention is further explained by using the attached drawings, but the content in the attached drawings does not constitute any limitation to the present invention.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

Included in fig. 1 and 2 are:

1-oil separation tank, 2-grit chamber, 3-reaction tank, 4-sedimentation tank, 5-fan room,

6-clean water pool, 7-effluent metering tank, 8-sludge concentration pool, 9-sludge dewatering room,

10-CaO feeder, 11-active carbon feeder.

Detailed Description

The present invention will be further illustrated with reference to the following examples.

Example 1

Referring to fig. 1, the kaolin acidic wastewater treatment system of the embodiment includes an oil separation tank 1, a grit chamber 2, a reaction tank 3, a sedimentation tank 4, a fan room 5, a clean water tank 6 and a water outlet metering tank 7, and after oil and large-particle residues carried by mechanical equipment are removed from kaolin acidic wastewater through the oil separation tank 1 and the grit chamber 2, the kaolin acidic wastewater sequentially passes through the reaction tank 3, the sedimentation tank 4 and the clean water tank 6, so that the total salt content of the kaolin acidic wastewater is efficiently and rapidly reduced, and water capable of being produced and recycled is obtained.

In this embodiment, the bottom of oil interceptor 1 and grit chamber 2 intercommunication and the bottom of oil interceptor 1 is higher than the bottom of grit chamber 2, and specifically, the bottom of oil interceptor 1 meets and the lateral wall of sharing is equipped with the intercommunication mouth with grit chamber 2. And the sediment at the bottom of the oil separation tank 1 flows into the grit chamber 2 through a communication port. The acid wastewater in the middle of the oil separation tank 1 is conveyed to the reaction tank 3. The oil separation tank 1 and the grit chamber 2 remove oil and large-particle residues carried by mechanical equipment, and the oil separation grit chamber 2 achieves the purpose of separation by utilizing the difference of specific gravity of suspended matters and water in wastewater. The structure of the oil separation tank 1 is a horizontal flow type, oily wastewater enters the oil separation tank 1, an oil product floats up to the water surface in the flow, and an oil collection area at the upper end of the oil separation tank 1 is connected with an oil collection pipe; and the oil scraper is also arranged and used for pushing the light oil in the oil separation pool 1 to the oil collecting pipe, and the oil outlet end of the oil collecting pipe is communicated with the oil collecting barrel. Heavy oil and other residues settled in the flow into the bottom of the grit chamber 2, and sludge accumulated at the bottom of the chamber is conveyed out through a sludge pipe.

In order to conveniently add activated carbon and CaO, an activated carbon feeder 11 and a CaO feeder 10 are installed above the reaction tank 3 in this embodiment, the activated carbon and quicklime (CaO) are added into the reaction tank 3 by a dry method, and acid water is used to perform secondary activation on the activated carbon, so as to dredge the micro-mesoporous structure of the activated carbon and increase the pore volume and the specific surface area. And when the activated carbon and the wastewater completely react, adding CaO by a dry method, wherein the CaO reacts with water to release a large amount of heat energy to activate the activated carbon for three times, and the heat energy promotes the forward reaction. Reaction of CaO with water to form Ca (OH) ₂ Is a neutralization reagent for the traditional water treatment, then an inclined plate sedimentation tank 4 is arranged to flow to a clear water tank 6 for water outlet, and the total salt content is rapidly reduced from 4500-6000ppm to 200-500 ppm. The synergistic effect of CaO and active carbon in the reaction process ensures that the reaction is rapid and efficient. And flocculation precipitation is not needed to be arranged, PAM and PAC are not added, the process is reduced, the waste residue treatment capacity is reduced, and the influence on the ecological environment can be reduced by reusing the treated water for production.

The waste water after the reaction in the reaction tank 3 is conveyed to a sedimentation tank 4, the sedimentation tank 4 is an inclined plate sedimentation tank 4, a slag discharge hopper is arranged at the bottom of the inclined plate sedimentation tank 4, and the slag discharge hopper conveys the precipitate to a fan room 5 through a pipeline. In the embodiment, the inclined plate sedimentation tank 4 utilizes the principle of 'shallow sedimentation', every two parallel inclined plates are mutually provided with a very shallow sedimentation tank 4, the plates and the horizontal plane form an angle of 50 degrees, the sedimentation distance of particles is shortened, the sedimentation time is shortened, the sedimentation area of the sedimentation tank 4 is increased, and the treatment efficiency is improved.

Clear liquid precipitated in the sedimentation tank 4 is conveyed to a clear water tank 6 and is discharged and recovered through a water outlet metering tank 7; and conveying the sediment precipitated by the grit chamber 2 and the inclined plate to a fan room 5.

Example 2

In order to improve the efficiency of sewage treatment, the reaction tank 3 of the present embodiment is equipped with a stirring device.

The main technical solution of this embodiment is substantially the same as that of embodiment 1, and the features that are not explained in this embodiment adopt the explanations in embodiment 1, and are not described herein again.

Example 3

Referring to fig. 2, the kaolin acid wastewater treatment system of the embodiment is further provided with a sludge concentration tank 8 and a sludge dewatering room 9, and sludge discharged from the fan room 5 is conveyed to the sludge concentration tank 8. The sludge concentration tank 8 is arranged in a radial flow type and can be operated intermittently, and simultaneously, the bottom of the sludge concentration tank 8 is provided with a sludge bucket, and the inclination angle between the sludge bucket and the horizontal plane is 80 degrees.

The sludge concentrated by the sludge concentration tank 8 is conveyed to a sludge dewatering room 9 for treatment. And (3) utilizing a drainage or filtration method to dewater the wet sludge to obtain the residual solid residue. After various dehydration treatments, the water content is reduced from about 99 percent to 65 percent to 85 percent, and the sludge becomes wet soil-like sludge.

The main technical solution of this embodiment is substantially the same as that of embodiment 1 or embodiment 2, and the features that are not explained in this embodiment adopt the explanations in embodiment 1 or embodiment 2, which are not described herein again.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and do not limit the protection scope of the claims. It will be understood by those skilled in the art that various modifications and substitutions can be made to the preferred embodiment without departing from the spirit and scope of the invention.

Claims

1. Acid effluent disposal system of kaolin, its characterized in that: comprises an oil separation tank, a grit chamber, a reaction tank, a sedimentation tank, a fan room, a clean water tank and a water outlet metering tank,

an activated carbon feeder and a CaO feeder are arranged above the reaction tank, and the wastewater after reaction in the reaction tank is conveyed to a sedimentation tank;

the clear liquid after the sedimentation in the sedimentation tank is conveyed to a clear water tank and is discharged and recovered through a water outlet metering tank;

2. The kaolin acidic wastewater treatment system of claim 1, wherein: the oil separation tank is arranged to be in a horizontal flow type.

3. The kaolin acidic wastewater treatment system according to claim 2, wherein: an oil collecting region at the upper end of the oil separation pool is connected with an oil collecting pipe; the oil separator is characterized by also comprising an oil scraper which pushes the light oil in the oil separation pool to an oil collecting pipe, and the oil outlet end of the oil collecting pipe is communicated with the oil collecting barrel.

4. The kaolin acidic wastewater treatment system according to claim 1, wherein: the bottom of the oil separation tank is connected with the grit chamber, and a communication port is formed in the shared side wall.

5. The kaolin acidic wastewater treatment system according to claim 1, wherein: the reaction tank is equipped with a stirring device.

6. The kaolin acidic wastewater treatment system according to claim 1, wherein: the sedimentation tank is an inclined plate sedimentation tank, a slag discharge hopper is arranged at the bottom of the inclined plate sedimentation tank, and the slag discharge hopper conveys sediments to the fan room through a pipeline.

7. The kaolin acidic wastewater treatment system according to claim 1, wherein: and a sludge concentration tank is also arranged, and sludge discharged by the fan room is conveyed to the sludge concentration tank.

8. The kaolin acidic wastewater treatment system of claim 7, wherein: the sludge concentration tank is arranged in a radial flow mode.

9. The kaolin acidic wastewater treatment system according to claim 8, wherein: the bottom of the sludge concentration tank is provided with a sludge bucket, and the inclination angle of the sludge bucket and the horizontal plane is 80 degrees.

10. The kaolin acidic wastewater treatment system according to claim 7, wherein: and a sludge dewatering room is also arranged, and the sludge concentrated by the sludge concentration tank is conveyed to the sludge dewatering room for treatment.