Backflushing filtering type phosphorus removal agent adding system

Abstract

The utility model relates to a back-flushing filtering type phosphorus removal agent adding system, and belongs to the technical field of sewage treatment. The system comprises a sewage sedimentation tank, a dosing tank, a dosing tank, a phosphorus removal agent pump, a backwashing filter and the like, a filter screen and fiber filter cloth are arranged in the backwashing filter, and the backwashing filter is divided into a to-be-filtered cavity and a filter cavity. And when the backwashing filter is communicated with the phosphorus removal agent inlet pipe and the phosphorus removal agent outlet pipe, the phosphorus removal agent is crystallized or impurities are filtered, so that an inlet and an outlet of the phosphorus removal agent pump are prevented from being blocked. When the backwashing filter is communicated with the backwashing inlet pipe and the backwashing outlet pipe, water enters the filter cavity from the backwashing inlet pipe, the fiber filter cloth and the filter screen mesh are reversely washed, and sewage after washing is discharged from the backwashing outlet pipe. According to the system, a backwashing inlet pipe is regularly opened at equal time intervals to clean a backwashing filter, or backwashing is manually started when a flowmeter monitors that the flow is lower than a threshold value. The system is simple in structure and has a wide application prospect.

Description

Technical Field

[0001] The utility model relates to a backwashing and filtering type phosphorus remover dosing system, which belongs to the technical field of sewage treatment. Background Technique

[0002] Phosphorus is one of the key limiting factors for water eutrophication. When phosphorus in sewage enters natural water bodies (such as rivers, lakes, and seas), it will cause a large number of plankton such as algae in the water to multiply. This is because phosphorus is an essential nutrient element for the growth of algae. Under sufficient light and suitable temperature conditions, algae will use phosphorus and other nutrients (such as nitrogen) in the water for rapid growth.

[0003] In order to protect the environment and public health, strict sewage discharge standards have been formulated, and there are clear restrictions on the discharge concentration of phosphorus. In the "Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants" (GB18918 - 2002) in China, the first - level A standard stipulates that the discharge concentration of phosphate (calculated as P) shall not exceed 0.5 mg / L.

[0004] With the enhancement of environmental awareness and the continuous development of water treatment technology, the requirements for water quality are increasing day by day. Phosphorus removal, as an important link in water treatment, is of great significance for preventing water eutrophication and protecting the water environment. However, impurities in the phosphorus remover or crystallization during storage may block the inlet and outlet pipes or the internal flow channels of the pump, making it impossible to transport the phosphorus remover normally. Content of the Utility Model

[0005] To solve the problems existing in the prior art, the utility model provides a backwashing and filtering type phosphorus remover dosing system, in which a backwashing filter is set to prevent the inlet and outlet of the pump from being blocked during the dosing process of the phosphorus remover.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a backwashing and filtering type phosphorus remover dosing system, which connects a sewage sedimentation tank to a chemical dosing tank. The chemical dosing tank is connected to a backwashing filter through a phosphorus remover inlet pipe, and then connected to a phosphorus remover pump through a filtered phosphorus remover outlet pipe, and then connected to the chemical dosing tank through a phosphorus remover pipe; a filter screen and a fiber filter cloth are arranged in the backwashing filter; the filter screen and the fiber filter cloth divide the backwashing filter into a to - be - filtered cavity and a filtered cavity; a backwashing inlet pipe is arranged on the filtered cavity, and a backwashing inlet valve is arranged on the backwashing inlet pipe. A backwashing outlet pipe is arranged on the to - be - filtered cavity, and a backwashing outlet valve is arranged on the backwashing outlet pipe.

[0007] Further, a stirrer is arranged in the chemical dosing tank.

[0008] Further, a phosphorus remover inlet valve is arranged on the phosphorus remover inlet pipe, and a filtered phosphorus remover outlet valve is arranged on the filtered phosphorus remover outlet pipe.

[0009] Furthermore, a flowmeter is provided on the phosphorus remover pipe.

[0010] The beneficial effects of the present utility model are as follows: The system includes a sewage sedimentation tank, a chemical dosing tank, a chemical dosing tank, a phosphorus remover pump, a backwash filter, etc. A filter screen and a fiber filter cloth are provided in the backwash filter, dividing the backwash filter into a to-be-filtered chamber and a filtered chamber. When the backwash filter connects the phosphorus remover inlet pipe and the phosphorus remover outlet pipe, it filters the crystallization or impurities of the phosphorus remover to prevent blockage of the inlet and outlet of the phosphorus remover pump. When the backwash filter connects the backwash inlet pipe and the backwash outlet pipe, water enters the filtered chamber from the backwash inlet pipe, reversely flushing the fiber filter cloth and the filter screen, and the flushed sewage is discharged from the backwash outlet pipe. The system regularly opens the backwash inlet pipe at equal time intervals to clean the backwash filter, or manually opens the backwash when the flowmeter monitors that the flow rate is lower than the threshold. The system is widely used in fields such as urban sewage treatment, industrial wastewater treatment, and drinking water treatment. At the same time, with the continuous tightening of environmental protection policies and the continuous progress of water treatment technologies, the market demand for this product will continue to grow, and it has broad development prospects. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of a backwash filtration type phosphorus remover dosing system.

[0012] In the figure: 1. Chemical dosing tank, 2. Phosphorus remover inlet pipe, 2a. Phosphorus remover inlet valve, 3. Backwash filter, 3a. Filter screen, 3b. Fiber filter cloth, 3c. To-be-filtered chamber, 3d. Filtered chamber, 4. Filtered phosphorus remover outlet pipe, 4a. Filtered phosphorus remover outlet valve, 5. Backwash inlet pipe, 5a. Backwash inlet valve, 6. Backwash outlet pipe, 6a. Backwash outlet valve, 7. Phosphorus remover pump, 7a. Phosphorus remover pipe, 8. Flowmeter, 9. Chemical dosing tank, 9a. Agitator, 10. Sewage sedimentation tank. Specific Embodiments

[0013] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0014] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0015] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components and / or their combinations.

[0016] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0017] In the description of the present invention, it should be understood that the orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. generally indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the scope of protection of the present invention. The orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0018] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations during use or operation in addition to the orientation described in the figure for the device. For example, if the device in the attached drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0019] In addition, it should be noted that the use of terms such as "first", "second", etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, so they should not be construed as limiting the protection scope of the present invention.

[0020] Figure 1 A backwash filtration type phosphorus removal agent dosing system is shown. This system has a sewage sedimentation tank 10 connected to a chemical dosing tank 9. A chemical dosing tank 1 is connected to a backwash filter 3 through a phosphorus removal agent inlet pipe 2, and then connected to a phosphorus removal agent pump 7 through a filtered phosphorus removal agent outlet pipe 4, and then connected to the chemical dosing tank 9 through a phosphorus removal agent pipe 7a. A flow meter 8 is provided on the phosphorus removal agent pipe 7a; the flow meter 8 is used to monitor the flow rate of the backwash filter 3, and backwashing is started when the outlet flow rate is lower than the threshold. At the same time, a stirrer 9a is provided in the chemical dosing tank 9 to increase the mixing of the phosphorus removal agent and sewage, so that the mixture is uniform to achieve a better phosphorus removal effect.

[0021] A filter screen 3a and a fiber filter cloth 3b are provided in the backwash filter 3; the filter screen 3a and the fiber filter cloth 3b divide the backwash filter 3 into a to-be-filtered chamber 3c and a filtered chamber 3d. Such as stainless steel wire mesh, fiber filter cloth, etc. The filter screen 3a uses stainless steel wire mesh with high strength and corrosion resistance, which is suitable for filtering larger particles and water with a certain impact force; the fiber filter cloth 3b can filter finer particles with high filtering accuracy. The combination of the two can meet the filtering requirements of the phosphorus removal agent.

[0022] A backwash inlet pipe 5 is provided on the filtered chamber 3d, and a backwash inlet valve 5a is provided on the backwash inlet pipe 5. A backwash outlet pipe 6 is provided on the to-be-filtered chamber 3c, and a backwash outlet valve 6a is provided on the backwash outlet pipe 6. A phosphorus removal agent inlet valve 2a is provided on the phosphorus removal agent inlet pipe 2, and a filtered phosphorus removal agent outlet valve 4a is provided on the filtered phosphorus removal agent outlet pipe 4.

[0023] When the dephosphorizing agent inlet valve 2a and the dephosphorizing agent outlet valve 4a are opened, and the backwash inlet valve 5a and the backwash outlet valve 6a are closed, the backwash filter 3 is connected to the dephosphorizing agent inlet pipe 2 and the dephosphorizing agent outlet pipe 4. The backwash filter 3 filters the crystallization or impurities of the dephosphorizing agent to avoid blocking the inlet and outlet of the dephosphorizing agent pump. When the dephosphorizing agent inlet valve 2a and the dephosphorizing agent outlet valve 4a are closed, and the backwash inlet valve 5a and the backwash outlet valve 6a are opened, the backwash filter 3 is connected to the backwash inlet pipe 5 and the backwash outlet pipe 6. Water enters the filter chamber 3d from the backwash inlet pipe 5, reversely flushing the fiber filter cloth 3b and the filter wire mesh 3a, and the flushed sewage is discharged from the backwash outlet pipe 6. During the backwashing process, the valve will adjust the water flow direction so that the backwash water can effectively flush the filter screen. After the flushing is completed, the backwash inlet valve 5a and the backwash outlet valve 6a are closed, the dephosphorizing agent inlet valve 2a and the dephosphorizing agent outlet valve 4a are opened, and then it returns to the normal chemical dosing working state.

[0024] This system uses regular opening of the backwash inlet pipe at equal time intervals to clean the backwash filter, or manually opens the backwash when the flowmeter monitors that the flow rate is lower than the threshold. This system is widely used in urban sewage treatment, industrial wastewater treatment, drinking water treatment and other fields. At the same time, with the continuous tightening of environmental protection policies and the continuous progress of water treatment technologies, the market demand for this product will continue to grow, with broad development prospects.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A backflush filtration type phosphorus removal agent dosing system, which connects a sewage sedimentation tank (10) to a chemical dosing tank (9), is characterized in that: The chemical dosing tank (1) is connected to the backwashing filter (3) through the dephosphorizing agent inlet pipe (2), and then connected to the dephosphorizing agent pump (7) through the filtered dephosphorizing agent outlet pipe (4), and then connected to the chemical dosing tank (9) through the dephosphorizing agent pipe (7a); A filter screen (3a) and a fiber filter cloth (3b) are arranged in the backwashing filter (3); the filter screen (3a) and the fiber filter cloth (3b) divide the backwashing filter (3) into a to-be-filtered chamber (3c) and a filtering chamber (3d); a backwashing inlet pipe (5) is arranged on the filtering chamber (3d), a backwashing inlet valve (5a) is arranged on the backwashing inlet pipe (5), a backwashing outlet pipe (6) is arranged on the to-be-filtered chamber (3c), and a backwashing outlet valve (6a) is arranged on the backwashing outlet pipe (6).

2. The dosing system for a backwash filtration type phosphorus remover according to claim 1, wherein: A stirrer (9a) is arranged in the chemical dosing tank (9).

3. The recoil filtration type phosphorus remover dosing system according to claim 1, wherein: A dephosphorizing agent inlet valve (2a) is arranged on the dephosphorizing agent inlet pipe (2), and a filtered dephosphorizing agent outlet valve (4a) is arranged on the filtered dephosphorizing agent outlet pipe (4).

4. A backwash filtration type phosphorus removal agent dosing system according to claim 1, characterized in that: A flowmeter (8) is arranged on the dephosphorizing agent pipe (7a).

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