A system for backwater

Abstract

The utility model discloses a system for backwater, including water storage unit and with water storage unit series connection setting front -end processing unit, front -end processing unit series connection setting pre -processing unit, still including with the reagent adding device of pre -processing unit connection, the export of reagent adding device is transversely set up on pre -processing unit, front -end processing unit includes biological membrane anaerobic pool and drum grating, pre -processing unit includes flocculator, filter tank, treatment pond, flocculator, filter tank, treatment pond head -tail series connection, flocculator includes flocculator for underground steel concrete structure, including two single grids, all be provided with agitator in each single grid, the agitator is submersible agitator, submersible agitator model QJB small -size stainless steel submersible agitator.

Description

Technical Field

[0001] This utility model belongs to the field of recycled water treatment technology, and specifically relates to a recycled water system. Background Technology

[0002] Paper production often uses waste paper, straw, and wood pulp as raw materials. The pulping and papermaking process generally consists of pulping and washing, bleaching, and papermaking. Pulping in the paper industry includes alkaline pulping, chemimechanical pulping, and mechanical pulping. Papermaking generates wastewater. Direct discharge of this wastewater pollutes the environment and is detrimental to environmental protection. Furthermore, the lack of recycling wastewater wastes water resources. Wastewater must be treated to meet standards before discharge. The lack of recycling results in large volumes of wastewater, wasting water resources. Additionally, the papermaking process involves many types of equipment and requires numerous mechanical seals, lubrication, and cooling points; using only clean water would lead to significant waste.

[0003] In view of the above factors, this utility model provides a water return system that utilizes the effluent from the secondary sedimentation tank of sewage treatment to achieve the mechanical seal water requirements and replace clean water. Utility Model Content

[0004] The purpose of this invention is to provide a water recycling system to solve the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved through the following technical solution: a water return system, including a water storage unit and a pre-treatment unit connected in series with the water storage unit, wherein a pre-treatment unit is connected in series with the pre-treatment unit;

[0006] It also includes a reagent addition device connected to the pretreatment unit, the outlet of which is laterally disposed on the pretreatment unit;

[0007] The pretreatment unit includes a biofilm anaerobic tank and a rotary drum screen, and the pretreatment unit includes a flocculation tank, a filtration tank, and a treatment tank, which are connected in series.

[0008] Furthermore, the flocculation tank is an underground reinforced concrete structure, comprising two individual compartments, each equipped with an agitator, which is a submersible agitator, specifically a QJB small stainless steel submersible agitator.

[0009] Furthermore, the reagent addition device is arranged along the surface of the flocculation tank. The reagent addition device includes a reagent storage bin, the outlet of which is connected to a buffer chamber. The bottom of the buffer chamber is fixedly connected to a discharge pipe, which is connected to the feeding end.

[0010] The discharge pipe is provided with at least three sets that are connected to the feeding end, and each discharge pipe is provided with an electromagnetic valve.

[0011] Furthermore, the reagent addition device is supported by a steel structure truss, the end of the feeding end is fixed on the flocculation tank, and at least four sets of the reagent addition device are provided.

[0012] Furthermore, the filter pool is an underground reinforced concrete structure, designed as two independent groups, each group divided into four compartments, and the filter pool is equipped with elastic three-dimensional packing material.

[0013] Furthermore, the treatment tank is an underground reinforced concrete structure. The front end of the treatment tank is connected to the end of the filtration tank, and it is designed as two independent groups, each group being divided into 5 compartments. The first three compartments of the treatment tank are equipped with elastic three-dimensional packing material, and the last two compartments are equipped with mineral filter media, namely SVA filter media.

[0014] Furthermore, a sand filter tank and an activated carbon tank are installed at the outlet of the water storage unit at the front end of the pretreatment unit, with the sand filter tank installed in front and the activated carbon tank installed behind, and the activated carbon tank is connected to the pretreatment unit.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model includes a water storage unit and a pretreatment unit connected in series with the water storage unit, and a pretreatment unit connected in series with the pretreatment unit; it also includes a reagent addition device connected to the pretreatment unit, and the outlet of the reagent addition device is horizontally arranged on the pretreatment unit.

[0017] The feeding end of this utility model includes a conveying pipe, and a conveying spiral tube is installed inside the conveying pipe. One end of the conveying spiral tube is open, and the other end is connected to a control motor. The rotation of the motor drives the conveying spiral tube to rotate. The discharge pipe is connected to the feeding end so that sulfuric acid, hydrogen peroxide, ferrous sulfate and flocculant are pushed out of the conveying pipe through the conveying spiral tube.

[0018] This invention utilizes the effluent from the secondary sedimentation tank of wastewater treatment to achieve the required level of mechanical seal water, thus replacing clean water. After the pretreatment unit and the series-connected pretreatment unit operate for a certain period of time, the water meets the standards for use as mechanical seal water, replacing clean water. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the connection between the pre-processing unit and the pre-processing unit of this utility model;

[0020] Figure 2 This is a schematic diagram showing the connection between the sand filter tank and the activated carbon tank of this utility model;

[0021] Figure 3This is a schematic diagram of the flocculation tank of this utility model;

[0022] Figure 4 This is a schematic diagram showing the connection between the pretreatment unit and the reagent addition device of this utility model;

[0023] Figure 5 This is a schematic diagram of the treatment tank of this utility model;

[0024] Figure 6 This is a schematic diagram of the filter tank of this utility model with packing material;

[0025] Figure 7 This is a front view schematic diagram of the pharmaceutical addition device of this utility model;

[0026] Figure 8 This is a schematic diagram of the treatment tank of this utility model;

[0027] Figure 9 This is a schematic diagram showing the connection between the first three compartments and the last three compartments of the treatment tank of this utility model;

[0028] Figure 10 This is a schematic diagram of the treatment tank of this utility model with packing material. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] like Figure 1-10 As shown, a water recycling system includes a water storage unit 1 and a pre-treatment unit 2 connected in series with the water storage unit 1, wherein a pre-treatment unit 3 is connected in series with the pre-treatment unit 2.

[0033] It also includes a reagent addition device 4 connected to the pretreatment unit 3. The outlet of the reagent addition device 4 is horizontally arranged on the pretreatment unit 3. A submersible pump is installed in the water storage unit 1 to pump water to the forward treatment unit 2.

[0034] The pretreatment unit 2 includes a biofilm anaerobic tank 21 and a rotary drum screen 22. The pretreatment unit 3 includes a flocculation tank 31, a filtration tank 32, and a treatment tank 33, which are connected in series.

[0035] To facilitate the collection of suspended particles in the water through a flocculation tank during use, thereby improving water quality and increasing subsequent treatment efficiency, the flocculation tank 31 is an underground reinforced concrete structure, comprising two individual compartments 34. Each individual compartment 34 is equipped with an agitator 35, which is a submersible agitator, specifically a QJB small stainless steel submersible agitator.

[0036] The water in the flocculation tank has a retention time of 4-5 hours. Multiple submersible pumps are installed in the flocculation tank to pump the water from the flocculation tank into the inclined plate sedimentation tank and then into the filtration tank 32.

[0037] In use, sulfuric acid, hydrogen peroxide, ferrous sulfate and flocculants are added to the flocculation tank to improve water quality. Aeration pipes are installed in both the filter tank 32 and the treatment tank 33. A blower supplies oxygen to the filter tank 32 and the treatment tank 33. The pretreatment unit 2 and the pretreatment unit 3 adopt bottom inlet and top outlet water.

[0038] To facilitate the addition of sulfuric acid, hydrogen peroxide, ferrous sulfate, and flocculant to the flocculation tank 31 via a reagent addition device 4 during use, the reagent addition device 4 is arranged along the surface of the flocculation tank 31. The reagent addition device 4 includes a storage tank 41, the outlet of which is connected to a buffer chamber 42. The bottom of the buffer chamber 42 is fixedly connected to a discharge pipe 43, which is connected to a feeding end 44.

[0039] At least three sets of discharge pipes 43 are provided and connected to the feeding end 44, and each discharge pipe 43 is equipped with an electromagnetic valve.

[0040] The feeding end 44 includes a conveying pipe, in which a conveying spiral tube is installed. One end of the conveying spiral tube is open, and the other end is connected to a control motor. The rotation of the motor drives the conveying spiral tube to rotate. The discharge pipe 43 is connected to the feeding end 44 so that sulfuric acid, hydrogen peroxide, ferrous sulfate and flocculant are pushed out of the conveying pipe through the conveying spiral tube.

[0041] The reagent addition device 4 is supported by a steel structure truss, and the end of the feeding end 44 is fixed on the flocculation tank 31. At least four sets of the reagent addition device 4 are provided.

[0042] To facilitate improved subsequent water treatment during operation, an inclined plate settler can be installed between the flocculation tank 31 and the filtration tank. The inclined plate settler can adopt the structure disclosed in the existing technology, that is, the inclined plate (tube) is at a 60-degree angle to the horizontal plane, the length is usually about 1.0m, the net distance between the inclined plates (or the diameter of the inclined tube) is generally 80-100mm, the water depth in the clear water zone above the inclined plate (tube) area is 0.7-1.0m, and the bottom buffer layer height is 1.0m.

[0043] To facilitate further water treatment during use, the filter tank 32 is an underground reinforced concrete structure, designed as two independent groups, each group divided into four compartments, and the filter tank 32 is equipped with elastic three-dimensional packing material.

[0044] The hydraulic retention time of the filter tank 32 is 2-3 hours. The filter tank 32 is equipped with a grid support, and packing is placed above the grid support. An aeration pipe is fixed below the grid and is connected to a blower for aeration treatment.

[0045] Electromagnetic valves and pipeline pumps are installed on the pipes connecting the flocculation tank 31, the filter tank 32, and the treatment tank 33. The water output of the filter tank 32 and the treatment tank 33 is controlled by the bottom water inlet and the upper end connecting pipe and pipeline pump.

[0046] The treatment tank 33 is an underground reinforced concrete structure. The front end of the treatment tank 33 is connected to the end of the filter tank 32. It is designed as two independent groups, each group is divided into 5 compartments. The first three compartments of the treatment tank 33 are equipped with elastic three-dimensional packing material, and the last two compartments are equipped with mineral filter media. The mineral filter media is SVA filter media. The first three compartments are connected. The treated water is pumped into the last two compartments through pipelines for further treatment.

[0047] The treatment tank 33 is equipped with a grid support, and packing is placed above the grid support. An aeration pipe is fixed below the grid and is connected to a blower for aeration treatment.

[0048] To facilitate primary filtration of reclaimed water during use, a sand filter tank 11 and an activated carbon tank 12 are installed at the outlet of the water storage unit 1 at the front end of the pretreatment unit 2. The sand filter tank 11 is installed in front, and the activated carbon tank 12 is installed behind. The activated carbon tank 12 is connected to the pretreatment unit 2.

[0049] The turbidity of water is reduced by using a sand filter canister and a quartz sand filter to remove colloidal and large particulate matter. The activated carbon filter canister can adsorb residual chlorine that cannot be removed by the pre-filtration stage, as well as small molecule organic pollutants. It has a significant adsorption and removal effect on odors, colloids, pigments, and heavy metal ions in water, and also has the effect of reducing COD.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A water recycling system, characterized in that: It includes a water storage unit (1) and a pre-treatment unit (2) connected in series with the water storage unit (1), wherein a pre-treatment unit (3) is connected in series with the pre-treatment unit (2). It also includes a drug addition device (4) connected to the pretreatment unit (3), the outlet of the drug addition device (4) being arranged laterally on the pretreatment unit (3); The pretreatment unit (2) includes a biofilm anaerobic tank (21) and a rotary drum screen (22). The pretreatment unit (3) includes a flocculation tank (31), a filtration tank (32), and a treatment tank (33). The flocculation tank (31), the filtration tank (32), and the treatment tank (33) are connected in series.

2. The water return system according to claim 1, characterized in that: The flocculation tank (31) is an underground reinforced concrete structure, including two single cells (34). Each single cell (34) is equipped with a stirrer (35). The stirrer (35) is a submersible stirrer, and the submersible stirrer model is QJB small stainless steel submersible stirrer.

3. The water return system according to claim 2, characterized in that: The agent addition device (4) is arranged along the surface of the flocculation tank (31). The agent addition device (4) includes a drug storage bin (41). The outlet of the drug storage bin (41) is connected to a buffer chamber (42). The bottom of the buffer chamber (42) is fixedly connected to a discharge pipe (43). The discharge pipe (43) is connected to the feeding end (44). The discharge pipe (43) is provided with at least three sets that are connected to the feeding end (44), and each discharge pipe (43) is provided with an electromagnetic valve.

4. The water return system according to claim 3, characterized in that: The agent addition device (4) is supported by a steel structure truss, and the end of the feeding end (44) is fixed on the flocculation tank (31). The agent addition device (4) is provided in at least four sets.

5. The water return system according to claim 4, characterized in that: The filter pool (32) is an underground reinforced concrete structure, designed as two independent groups, each group divided into two compartments, and the filter pool (32) is equipped with elastic three-dimensional packing.

6. The water return system according to claim 5, characterized in that: The treatment tank (33) is an underground reinforced concrete structure. The front end of the treatment tank (33) is connected to the end of the filter tank (32). It is designed as two independent groups, each group is divided into 5 compartments. The first three compartments of the treatment tank (33) are equipped with elastic three-dimensional packing, and the last two compartments are equipped with mineral filter media. The mineral filter media is SVA filter media.

7. The water return system according to claim 6, characterized in that: The pretreatment unit (2) has a sand filter tank (11) and an activated carbon tank (12) installed at the outlet of the water storage unit (1). The sand filter tank (11) is installed in front and the activated carbon tank (12) is installed behind. The activated carbon tank (12) is connected to the pretreatment unit (2).

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