Efficient reaction device with coagulation, clarification and filtration effects

Abstract

The utility model relates to an efficient reaction device with coagulation, clarification and filtration effects, which comprises an aeration combined reactor, a coagulation, clarification and precipitation reactor, a defluorination reactor, a filtration reactor and a water outlet device, and a plurality of groups of first reaction tanks and aeration tanks are arranged in the aeration combined reactor; a sludge reflux device is arranged in the coagulation clarification precipitation reactor, one end of the sludge reflux device is connected with the front end of the aeration combined reactor, and the other end of the sludge reflux device is connected with the coagulation clarification precipitation reactor; and the defluorination reactor comprises a second reaction tank and a sedimentation tank. The efficient reaction device is integrated equipment, the treatment process flow is smooth, the power cost is low, the treatment effect can be improved, the chemical sludge yield is reduced, the agent cost and the equipment operation and maintenance cost are reduced, the treatment effect is stable, and the purposes of protecting the ecological environment of a water body and achieving standard discharge of acid wastewater of industrial and mining enterprises can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of iron sulfate acid wastewater treatment in industrial wastewater, and in particular relates to a high-efficiency reaction device with coagulation, clarification and filtration functions. Background Art

[0002] A large amount of wastewater generated during the mining of mineral resources, especially acidic wastewater from pyrite mines, seriously pollutes the water environment due to its high acidity (pH value is generally 1.5~2.5) and contains a variety of high-concentration heavy metal ions (such as Cu, Zn, Cd, As, Mn, etc.). Toxic substances in water (such as heavy metal ions Cd, etc.) will be absorbed by the human body and organisms and poison the body; a large amount of organic and inorganic substances (such as sulfide, sulfite and other reducing substances) discharged into the water body will significantly reduce the dissolved oxygen in the water, or even completely lack of oxygen, thus affecting the life of aquatic organisms; wastewater containing certain inorganic substances discharged into the water body will increase the hardness or salt content in the water. If such wastewater is used to irrigate farmland, it will cause soil salinization. If this type of acidic wastewater is not treated and directly discharged, it will pose a great threat to the health and safety of local people. In order to protect the ecological environment of water bodies and achieve the standard discharge of acidic wastewater from industrial and mining enterprises, the demand for economically feasible acidic wastewater treatment project technology is growing. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems. The present application proposes a high-efficiency reaction device with coagulation, clarification and filtration functions, which is an integrated device and can effectively solve the problem of acidic wastewater treatment.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-efficiency reaction device with coagulation, clarification and filtration functions, comprising an aeration combination reactor, a coagulation, clarification and sedimentation reactor, a defluorination reactor, a filtration reactor and a water outlet device connected in sequence, wherein a plurality of first reaction tanks and aeration tanks are arranged in the aeration combination reactor; a sludge return device is arranged in the coagulation, clarification and sedimentation reactor, one end of the sludge return device is connected to the front end of the aeration combination reactor, and the other end is connected to the sludge area in the coagulation, clarification and sedimentation reactor; the defluorination reactor comprises a second reaction tank and a sedimentation tank, and the sedimentation tank adopts an inclined plate sedimentation tank.

[0005] Furthermore: the coagulation, clarification and sedimentation reactor adopts a concentrated sludge scraper, which is used in conjunction with a sludge return device.

[0006] Furthermore: the filtering reactor and the water outlet device adopt a rapid filter device.

[0007] Furthermore: the first reaction tank is used for adding reagents, and air is introduced into the aeration tank for aeration.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] The utility model device is composed of an aeration combined reactor, a coagulation clarification sedimentation reactor, a defluorination reactor, a filtration reactor, and a water outlet device. A plurality of first reaction tanks and aeration tanks are arranged in the aeration combined reactor for adding lime milk to adjust the pH of the influent water, and then introducing air for aeration to make Fe 2+ Converted to Fe 3+ Finally, flocculants are added to the coagulation tank to improve the removal effect, and Fe, Cd, Cu, Ni, manganese, etc. are converted into insoluble solid precipitation. Then, the sludge return device in the coagulation clarification sedimentation reactor is used to improve the use effect of the agent and optimize the precipitation effect. The second reaction tank and sedimentation tank are set in the defluorination reactor. The sedimentation tank adopts an inclined plate sedimentation tank for static sedimentation, so that the sludge obtained by the reaction can be efficiently precipitated. The supernatant effluent of the sedimentation tank enters the filtration and effluent device, and the concentrated sludge at the bottom is discharged to the sludge tank by gravity. This high-efficiency reaction device is an integrated integrated equipment, which can save a lot of equipment maintenance costs and greatly improve the utilization rate of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for more clearly illustrating the embodiments of the utility model or the technical solutions in the prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0011] Figure 1 It is a top view of the overall structural schematic diagram of the utility model;

[0012] Figure 2 A cross-sectional view showing the overall structure of the utility model;

[0013] In the figure: 1- aeration combined reactor, 2- coagulation clarification sedimentation reactor, 3- defluorination reactor, 4- filtration reactor, 5- sludge return device, 6- water outlet device. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand and implement the technical solution of the utility model, the utility model is further described below in conjunction with specific embodiments. However, the embodiments are only used as an explanation of the utility model and are not intended to limit the utility model.

[0015] like Figure 1~2The shown high-efficiency reaction device with coagulation, clarification and filtration functions is an integrated device consisting of an aeration combination reactor 1, a coagulation, clarification and sedimentation reactor 2, a defluorination reactor 3, a filtration reactor 4, a sludge return device 5 and a water outlet device 6. No pipeline connection is required between the aeration combination reactor 1, the coagulation, clarification and sedimentation reactor 2, the defluorination reactor 3, the filtration reactor 4 and the water outlet device 6, and the wastewater flows by itself through the pressure head in the system.

[0016] The aeration combined reactor 1 is provided with a plurality of first reaction tanks for adding lime milk to adjust the pH of the influent water, and then introducing air for aeration to make Fe 2+ Converted to Fe 3+ Finally, flocculants are added to the coagulation, clarification and sedimentation reactor 2 to improve the removal effect and convert Fe, Cd, Cu, Ni, manganese, etc. into insoluble solid precipitates.

[0017] A sludge return device 5 is provided in the coagulation, clarification and sedimentation reactor 2, one end of the sludge return device 5 is connected to the front end of the aeration combination reactor 1, and the other end is placed in the sludge area in the coagulation, clarification and sedimentation reactor 2; the coagulation, clarification and sedimentation reactor 2 adopts a concentrated sludge scraper, which is used in conjunction with the sludge return device to improve the use effect of the agent and optimize the sedimentation effect.

[0018] The defluorination reactor 3 comprises a second reaction tank and a sedimentation tank. The sedimentation tank adopts an inclined plate sedimentation tank for static sedimentation, so that the sludge obtained by the reaction is efficiently precipitated. The supernatant water of the sedimentation tank enters the filtration and water outlet device, and the concentrated sludge at the bottom is gravity discharged to the sludge tank.

[0019] The filtering reactor 4 and the water outlet device 6 adopt a rapid filter device to reduce the residual pollutants in the outlet water.

[0020] Workflow

[0021] Industrial wastewater is pumped into the aeration combined reactor 1, lime milk is added to adjust the pH value to 8.5-9.0, and air is introduced into the aeration tank to aerate Fe 2+ Converted to Fe 3+ Finally, flocculants are added to the coagulation, clarification and sedimentation reactor to improve the removal effect and convert Fe, Cd, Cu, Ni, manganese, etc. into insoluble solid precipitates.

[0022] According to the reaction principle of aeration iron removal:

[0023]

[0024] Removal of 1g of Fe 2+ , requiring 0.143g of oxygen.

[0025] The effluent flows by gravity to the coagulation, clarification and sedimentation reactor 2, where a large amount of suspended solids are precipitated. The effluent after sedimentation enters the second reaction tank of the defluorination reactor 3, where the defluorination agent: PAM is added. The effluent then enters the sedimentation tank of the defluorination reactor to remove excess fluoride. The effluent enters the filtration reactor 4 to filter out excess suspended solids before meeting the discharge standards.

[0026] Part of the sludge from the coagulation, clarification and sedimentation reactor 2 is returned to the front end of the aeration combination reactor 1 through the sludge return device 5 to mix with the incoming water to improve the treatment efficiency and the reaction efficiency of the lime. The remaining sludge and the sludge generated in the sedimentation tank of the defluorination reactor 3 enter the sludge system for treatment.

[0027] This high-efficiency integrated reaction device has a smooth treatment process and low power cost, which can improve the treatment effect, reduce the output of chemical sludge, reduce the cost of reagents and equipment operation and maintenance costs, and has a stable treatment effect. It can protect the ecological environment of the water body and achieve the purpose of meeting the discharge standards of acidic wastewater from industrial and mining enterprises.

[0028] The contents not described in detail in the present invention are all prior art.

[0029] The above is only a preferred embodiment of the utility model, and is not limited to the description in the specification and implementation. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the utility model patent application should be included in the scope of the utility model patent application.

Claims

1. A high-efficiency reaction device with coagulation, clarification and filtration functions, characterized in that: The invention comprises an aeration combined reactor (1), a coagulation, clarification and sedimentation reactor (2), a defluorination reactor (3), a filtration reactor (4) and a water outlet device (6) which are connected in sequence. The aeration combined reactor (1) is provided with a plurality of first reaction tanks and aeration tanks. The coagulation, clarification and sedimentation reactor (2) is provided with a sludge return device (5). One end of the sludge return device (5) is connected to the front end of the aeration combined reactor (1), and the other end is connected to the coagulation, clarification and sedimentation reactor (2). The defluorination reactor (3) comprises a second reaction tank and a sedimentation tank. The sedimentation tank adopts an inclined plate sedimentation tank.

2. A high-efficiency reaction device with coagulation, clarification and filtration functions according to claim 1, characterized in that: The coagulation, clarification and sedimentation reactor (2) adopts a concentrated sludge scraper, which is used in conjunction with a sludge return device (5).

3. The high-efficiency reaction device with coagulation, clarification and filtration function according to claim 1, characterized in that: The filtering reactor (4) and the water outlet device (6) adopt a rapid filter device.

4. The high-efficiency reaction device with coagulation, clarification and filtration function according to claim 1, characterized in that: The first reaction tank is used for adding reagents, and air is introduced into the aeration tank for aeration.

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