CN216236408U

CN216236408U - Beneficiation wastewater treatment system

Info

Publication number: CN216236408U
Application number: CN202122838958.6U
Authority: CN
Inventors: 兰晓平; 李志华; 黄迅; 刘振兴
Original assignee: Yueyang Yide Environmental Protection Technology Co ltd
Current assignee: Yueyang Yide Environmental Protection Technology Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-04-08
Anticipated expiration: 2031-11-18

Abstract

The utility model discloses a beneficiation wastewater treatment system, which comprises a first filtering tank, a homogenizing tank, a first reaction tank, a second reaction tank, a third reaction tank, a sedimentation tank, a second filtering tank, a clean water tank and an outward discharge pasteurization tank; wherein the first filtering tank, the homogenizing tank, the first reaction tank, the second reaction tank, the third reaction tank, the sedimentation tank, the second filtering tank, the clean water tank and the outer discharge pasteurization tank are communicated through pipelines in sequence; the sedimentation tank is respectively communicated with the second reaction tank and the first filtering tank. The COD of the wastewater treated by the system and the process is less than 70mg/L, the wastewater meets the requirement of the first-class A discharge standard of Integrated wastewater discharge Standard (GB8978-1996), sodium chlorate and other hidden COD components are not contained in the treatment process, secondary pollution is not generated, the treated sludge can be reused, and the use cost of customers is reduced.

Description

Beneficiation wastewater treatment system

Technical Field

The utility model belongs to the technical field of sewage treatment, and particularly relates to a beneficiation wastewater treatment system.

Background

The main harmful substances in the mineral processing wastewater are various insoluble ultrafine particles such as bauxite and tungsten-molybdenum ore, the particles can block gills of fish and influence photosynthesis of algae to interfere living conditions of aquatic organisms when being suspended in water, if the concentration of suspended matters is too high, river channels can be silted, soil can be hardened when the river channels are irrigated by the particles, and if the particles are used as living water, the suspended matters are substances which cause discomfort in appearance and are harmful to human bodies. The beneficiation wastewater is difficult to reduce COD in the wastewater by polyaluminium chloride, polyferric coagulate or sodium hypochlorite and hydrogen peroxide oxidation because a plurality of foaming agents, trapping agents, inhibitors, vulcanizing agents and other components are used in the beneficiation process.

At present, the COD reduction method is mainly achieved by adding a sodium chlorate type oxidant, normal-temperature neutrality does not directly play a role in oxidizing organic matters and reducing substances in sewage, and only the organic matters and the reducing substances in the sewage are oxidized before potassium dichromate when the COD value is measured in a high-temperature acidic environment, so that the oxidant cannot truly reduce the COD in the sewage, the wastewater still needs to be naturally degraded after being discharged into a natural water body, and secondary pollution can be caused.

Therefore, the technical personnel in the field need to solve the problem that the system for treating the mineral processing wastewater and the treatment process thereof do not use sodium chlorate and do not have a COD screening effect.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a beneficiation wastewater treatment system and a treatment process thereof, COD of wastewater treated by the system and the process is less than 70mg/L, water meeting the requirement of the first-level A discharge standard of Integrated wastewater discharge Standard (GB8978-1996) is achieved, sodium chlorate and other hidden and cheated COD components are not contained in the treatment process, secondary pollution is not generated, the treated sludge can be reused, and the use cost of customers is reduced.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a beneficiation wastewater treatment system comprises a first filtering tank, a homogenizing tank, a first reaction tank, a second reaction tank, a third reaction tank, a sedimentation tank, a second filtering tank, a clean water tank and an outward discharge pasteurization tank;

wherein the first filtering tank, the homogenizing tank, the first reaction tank, the second reaction tank, the third reaction tank, the sedimentation tank, the second filtering tank, the clean water tank and the outer discharge pasteurization tank are communicated through pipelines in sequence; the sedimentation tank is respectively communicated with the second reaction tank and the first filtering tank.

In the traditional treatment process, a water purification flocculating agent is added into each reaction tank for destabilization; adding a hidden-defect-type COD degrading agent into the second reaction tank; and (3) adding flocculation precipitation and sludge-water separation into the third reaction tank, wherein the separation of sludge and water can not be carried out after the beneficiation reagent containing oil and the complexing agent is dissolved in water, and the hidden defect type COD (chemical oxygen demand) degradation agent does not directly improve the characteristics of the sewage after being added into the sewage. In the process, a water purification flocculant is also added into the first reaction tank for destabilization, and a nano-type composite COD degrading agent (adsorbable and ion exchange oil and mineral dressing agent with complexing agent) without hidden additives is added into the second reaction tank for reducing the concentration and chromaticity of organic matters in the sewage; and the third reaction tank is added with flocculation and sedimentation, mud and water are separated, and pollutants can be transferred into sludge for separation, concentration and centralized treatment, so that the pollutants in the mineral processing wastewater are really reduced.

Preferably, the second filter tank is a D-type fiber filter tank.

The D-type fiber filter tank adopted by the utility model is a gravity type deep filter tank, adopts comet type fiber filter materials, small-resistance water distribution cloth, air-water back flushing and variable water level or constant water level filtering modes, is the most efficient filtering technology for removing suspended matters in the conventional deep filter tank, and has the advantages of high filtering speed, high filtering precision, large pollutant interception capacity, small occupied area, low average use cost and long service life.

Preferably, the water purification flocculant is added into the first reaction tank, and the stirring time is 2-5 min.

After the utility model is fully stirred, colloid pollutants in the sewage are destabilized to form fine alum flocs suspended in the water after the action of a water purification flocculating agent on a compressed double electric layer and a bridge frame is about 3 min.

Preferably, the water purification flocculant is a composite aluminum ferric salt flocculant.

The water purifying flocculant is prepared by compounding polyaluminium chloride and polyferric chloride according to a certain proportion, the polyaluminium chloride and the polyferric chloride are large in size, but the polyferric chloride has a heavy molecular weight and is easy to precipitate and separate.

Preferably, the COD degradation agent is added into the second reaction tank, and the stirring time is 5-10 min.

The utility model needs to be fully stirred for at least 5min, and the solid powder substances of the nano composite COD degradant can effectively collide with the pollutants in the sewage and are mutually attracted and combined to reach a balanced concentration.

Preferably, the COD degrading agent is a nano-type composite COD degrading agent.

Safe and environment-friendly, does not produce secondary pollution, and can really reduce the concentration of the beneficiation reagent in the wastewater.

Preferably, the decolorizing flocculant is added into the third reaction tank, and the stirring time is 2-10 min.

Preferably, the decolorizing flocculant is a polymeric flocculant.

The polymer flocculant of the utility model mainly plays a role of net capture, and polymers are fully combined with destabilized alum floc and solid particles for adsorbing pollutants, slowly grow into large floc and precipitate to achieve the effects of separating mud from water and decoloring.

Preferably, the method comprises the following specific steps:

(1) after adding composite iron salt into the plant selection wastewater, precipitating and filtering in a first filtering tank, and then homogenizing in a homogenizing tank;

(2) sequentially passing the wastewater homogenized in the step (1) through a first reaction tank, a second reaction tank and a third reaction tank to obtain a mud-water mixture;

(3) and after the mud-water mixture enters a sedimentation tank, settling to obtain sludge and supernatant, recycling the sludge to the second reaction tank and the first filtering tank, and filtering the supernatant by the second filtering tank to flow into a clean water tank and an effluent pasteurization tank.

The sludge contains unsaturated nano-composite COD degrading agents and is recycled to the second reaction tank and the first filtering tank, so that pollutants in part of the original sewage can be reduced, and the using amount of the nano-composite COD degrading agents is saved; and after the second supernatant is filtered by a second filtering tank, the non-precipitated completely black suspended particles can be removed, and the standard-reaching discharge is realized.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a beneficiation wastewater treatment system and a treatment process thereof, COD of wastewater treated by the system and the process is less than 70mg/L, water meeting the requirement of the first-class A discharge standard of Integrated wastewater discharge Standard (GB8978-1996) is reached, sodium chlorate and other hidden COD components are not contained in the treatment process, secondary pollution is not generated, the treated sludge can be reused, and the use cost of customers is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a beneficiation wastewater treatment system of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.

Example 1

Referring to fig. 1, the beneficiation wastewater treatment process comprises the following preparation steps:

(1) adding a composite iron salt (the composite iron salt manufacturer is Hunan Yide chemical Co., Ltd., the total iron content is not less than 21%, and the solid mass addition amount is 0.00015 ton/cubic tailing wastewater) into 20ml of plant selection wastewater, precipitating and filtering in a first filtering tank, and then feeding into a homogenizing tank for homogenizing;

(2) after the homogenized wastewater in the step (1) enters a first reaction tank, 0.024ml of a water-purifying flocculant YD-01 (Yueyangyide environmental protection science and technology Limited company, the main component of which is a composite aluminum-iron salt, the raw materials comprise 90 mass percent of a 10% concentration polyaluminum chloride solution and 10 mass percent of a 32% concentration polyferric chloride solution, the pH value of a mixed solution after compounding is 3.2, and the mixed solution mainly plays a role in destabilization), and after stirring for about 2min, destabilizing to generate small alum flocs; then the mixture enters a second reaction tank, 0.05g of nano biomass COD (chemical oxygen demand) degradant YD-06 (research and development manufacturer, Yueyangyide environmental protection science and technology Co., Ltd., components: 8% of polyaluminium chloride solution with the concentration of 10%; 300 meshes of solid powder, 22% of rice hull active carbon with the iodine value of not less than 1200, 5% of 98% concentrated sulfuric acid, and the balance of water are added, and the pH value of the mixed solution is 4.5 after compounding, wherein the preparation method of the rice hull active carbon comprises the steps of firstly carbonizing rice hulls at the high temperature of 600 ℃ for 40h under the condition of air isolation, then carrying out oxidation and activation with steam for 10h under the condition of 400 ℃) to mainly act as a large amount of mineral dressing agents with ion exchange and coagulation adsorption and sink in mud, stirring for about 5min, and then combining with stably producing small alum flowers to form flocculation cores; finally, the mixture enters a third reaction tank, 1.5ml of decolorizing flocculant YD-03 (a main component polymeric flocculant (a manufacturer is produced by France Edison, 926 is an anionic type, and the molecular weight is 1600 ten thousand)) is added, and after stirring for about 2min, the decolorizing flocculant YD-03 is combined with destabilization generated small alum flocs to form large flocs, and the large alum flocs mutually collide to adsorb smaller and finer colloidal particles in water, so that the aim of separating mud from water is fulfilled, and a mud-water mixture is obtained;

(3) and finally, after the mud-water mixture enters a sedimentation tank, settling to obtain sludge and supernatant, recycling the sludge to a second reaction tank, overflowing the excess sludge to the first filtering tank, filtering the supernatant by a second filtering tank, reducing turbidity, flowing into a clean water tank to reach the beneficiation recycling standard, and discharging the excess wastewater to an externally-discharged Pasteur tank.

Examples 2 to 3

The addition amount of the nano biomass COD degrading agent YD-06 is different from that of the nano biomass COD degrading agent YD-06 in the embodiment 1, the rest steps are completely the same, and the related addition amount and the experimental result are shown in a table 1;

comparative example 1

The results are shown in table 1 for the data of the supernatant of the mineral processing waste liquid;

comparative example 2

The data result of the supernatant of the mineral processing waste liquid filtered by the step 1 is shown in a table 1;

TABLE 1 TABLE of the amounts of reagents used in examples 1-3 and comparative examples 1-2 and results

Serial number	YD-01 dosage	Using amount of YD-06	YD-03 dosage	COD value	COD degradation rate
						Comparative example 1	--	--	--	207	---
Comparative example 2	--	--	--	207	0％
						Example 1	0.024mL	0.05g	1.5mL	154.3	25.46％
Example 2	0.024mL	0.01g	1.5mL	98.2	52.56％
						Example 3	0.024mL	0.2	1.5mL	71.7	65.54％

As can be seen from the data in the table above, the COD of the wastewater treated by the technical scheme of the utility model can reach 70mg/L, the wastewater meets the requirements of the first-class A discharge standard of Integrated wastewater discharge Standard (GB8978-1996), sodium chlorate and other hidden COD components are not contained in the treatment process, secondary pollution is not generated, the treated sludge can be reused, the use cost of customers is reduced, and the method has remarkable progress.

The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A beneficiation wastewater treatment system is characterized by comprising a first filtering tank, a homogenizing tank, a first reaction tank, a second reaction tank, a third reaction tank, a sedimentation tank, a second filtering tank, a clean water tank and an outward discharge pasteurization tank;

2. The beneficiation wastewater treatment system according to claim 1, wherein the second filter tank is a D-type fiber filter tank.

3. The beneficiation wastewater treatment system according to claim 1, wherein a pure water flocculant is added into the first reaction tank, and the stirring time is 2-5 min.

4. The beneficiation wastewater treatment system according to claim 3, wherein the water purification flocculant is a composite aluminum iron salt flocculant.

5. The beneficiation wastewater treatment system according to claim 1, wherein a COD degradation agent is added into the second reaction tank, and the stirring time is 5-10 min.

6. The beneficiation wastewater treatment system according to claim 5, wherein the COD degrader is a nano-type composite COD degrader.

7. The beneficiation wastewater treatment system according to claim 1, wherein a decolorizing flocculant is added into the third reaction tank, and the stirring time is 2-10 min.

8. The beneficiation wastewater treatment system according to claim 7, wherein the decolorizing flocculant is a polymeric flocculant.