Tubular decrement filtering device

Abstract

A tubular decrement filtering device belongs to the technical field of water treatment and is characterized in that a raw water feeding pipe is hermetically communicated with a feeding and discharging pipe of a first filtering unit through a water inlet flowmeter and a pressure gauge, and a water outlet connecting pipe orifice of the first filtering unit is serially and hermetically communicated with the following filtering units in sequence; the water outlet connecting pipe orifice of the last filter unit is hermetically communicated with a concentrated water connecting pipe through a concentrated water flowmeter, a backwashing pipe orifice is mounted on the filter pipe wall of each filter unit, backwashing pipes are hermetically communicated in parallel in sequence through the backwashing pipe orifices of the filter units, and a clean water discharging pipe orifice is mounted below the filter pipe wall of each filter unit. And the clean water discharge pipe orifices are sequentially connected in parallel and are hermetically communicated with the clean water discharge pipe through a clean water flowmeter. The method has the beneficial effects that the wastewater can be subjected to decrement treatment without using a flocculating agent; the problem that other filtering systems cannot run continuously is solved, and the situation that the filtering flow is changed from large to small and the filtering medium is finally cleaned by shutdown like a filter press and other filters is not needed.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment. Background Art

[0002] Traditional wastewater pre-treatment technology: Some wastewater with very low suspended solids concentration needs to be reduced first. It mainly uses sedimentation (flotation) tanks to reduce the amount, and the clean water is discharged when it meets the standards. The concentrated water is then filtered out by the filter press, and the water discharged from the press returns to the sedimentation (flotation) tank.

[0003] Disadvantages of traditional technology: A large amount of flocculants need to be added to the sedimentation tank (flotation tank) during the wastewater treatment process to make the suspended matter in the wastewater settle (float) and separate from the water to achieve the purpose of reducing the amount of wastewater. The use of flocculants increases the harmful components in the wastewater, making the later treatment of the wastewater (reuse of recycled water or zero discharge) more difficult, and also increases the cost of wastewater treatment. Utility Model Content

[0004] The utility model aims to provide a tubular reduction filtering device which can reduce the amount of waste water without using flocculants.

[0005] The technical solution of the utility model is:

[0006] The raw water feed pipe is tightly connected to the inlet and outlet pipes of the first filter unit through a water inlet flowmeter and a pressure gauge; the outlet water connecting pipe port of the first filter unit is tightly connected in series with the following filter units in sequence; the outlet water connecting pipe port of the last filter unit is tightly connected to the concentrated water connecting pipe through a concentrated water flowmeter; a backwash pipe port is installed on the filter tube wall of each filter unit; the backwash pipe is tightly connected in parallel through the backwash pipe ports of each filter unit in sequence; a clean water discharge pipe port is installed under the filter tube wall of the filter unit; the clean water discharge pipe ports are tightly connected to the clean water discharge pipe in sequence in parallel through a clean water flowmeter.

[0007] In the filter unit, the raw water feed pipe is connected to the filter medium mesh pipe, a filter unit backwash pipe is arranged outside the filter medium mesh pipe, a backwash pipe port is installed on the filter pipe wall of the filter unit, and a clean water discharge pipe port is installed under the filter pipe wall of the filter unit.

[0008] The filtering unit is an array.

[0009] The beneficial effects of the utility model are: wastewater can be reduced without using flocculants; the problem that other filtering systems cannot operate continuously is solved, and there is no need to filter the flow from large to small and then stop the machine to clean the filter medium like a filter press and other filters. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model.

[0011] Figure 2 It is a cross-sectional view of the filter unit structure of the utility model. DETAILED DESCRIPTION

[0012] The utility model is further described below in conjunction with the accompanying drawings:

[0013] like Figure 1 As shown, 1 is the raw water feed pipe, 2 is the water inlet flow meter, 3 is the pressure gauge, 4 is the water outlet connecting pipe, 5 is the backwash connecting pipe, 6 is the filter unit, 7 is the clean water pipe, 8 is the concentrated water connecting pipe, 9 is the concentrated water flow meter, and 10 is the clean water flow meter.

[0014] like Figure 2 As shown, 6-1 is the inlet and outlet pipe, 6-2 is the inlet and outlet pipe end plate, 6-3 is the end plate sealing gasket, 6-4 is the filter tube flange, 6-5 is the sealing ring, 6-6 is the backwash pipe opening, 6-7 is the filter tube, 6-8 is the filter medium mesh pipe, 6-9 is the filter medium, 6-10 is the filter medium skeleton, and 6-11 is the clean water outlet pipe opening.

[0015] Multiple filter units 6 are connected in series by pipelines. When wastewater passes through the filter unit 6, clean water without suspended matter can pass through the filter medium to enter the clean water side and be discharged. Suspended matter in the wastewater cannot pass through the filter medium and remains on the concentrated water side, and the concentration continues to increase to achieve the purpose of reducing wastewater. Suspended matter will continue to gather on the filter unit medium to form a filter cake and reduce the amount of clean water permeable. At this time, a pneumatic shock backwash is applied to the clean water side to make the filter cake on the filter unit medium fall off and enter the concentrated water, and the water permeability of the filter medium is restored. This process is cyclically scheduled, and the filter medium does not need to be shut down for cleaning, and the filter system can operate continuously. Wastewater is reduced without adding flocculants, and the reduction ratio can reach 80%.

[0016] Filter unit:

[0017] (1) The filter medium 6-9 is placed on the filter medium skeleton 6-10, and the filter media 6-9 and 6-10 are placed in the filter medium mesh tube 6-8, and the filter medium 6-9 is tightly connected to the filter medium mesh tube 6-8. The filter medium mesh tube 6-8, the filter medium 6-9, and the filter medium skeleton 6-10 are placed in the filter tube 6-7;

[0018] (2) The end of the inlet and outlet pipe 6-1 is equipped with a sealing ring 6-5 which is inserted into the filter medium 6-9 to achieve a sealed connection with 6-8, 6-9, and 6-10;

[0019] (3) The inlet and outlet pipe end plate 6-2 is connected to the filter pipe flange 6-4, and the end plate sealing gasket 6-3 is placed in the middle;

[0020] (4) The clean water discharge pipe port 6-11 and the backwash pipe port 6-6 are placed on the filter tube 6-7 and are tightly connected.

[0021] (5) Wastewater enters from one end of the inlet and outlet pipe 6-1, and clean water passes through the filter medium 6-9 and enters the filter pipe 6-7, and exits from the clean water outlet pipe 6-11. Suspended matter remains in the wastewater to form concentrated water, which is discharged from the other inlet and outlet pipe 6-1, and the wastewater is concentrated and reduced.

[0022] (6) As the concentration increases, the suspended matter in the wastewater gathers on the filter medium 6-9 to form a filter cake layer that prevents clean water from passing through, and the water output decreases.

[0023] (7) Using the backwash nozzle 6-6 to perform oscillation backwashing, the filter medium 6-9 is deformed on the filter medium skeleton 6-10, and the suspended matter filter cake layer attached thereto falls off and enters the wastewater, and the water production is restored.

[0024] (8) The filtration unit can operate continuously and produce stable water without stopping for slag cleaning.

[0025] Tubular reduction filter device:

[0026] (1) Multiple filter units 6 are connected in series and sealed by the outlet connection pipe 4. The raw water feed pipe 1 equipped with the water inlet flow meter 2 and the pressure gauge 3 is sealed connected to the first filter unit, and the concentrated water connection pipe 8 equipped with the outlet flow meter 9 is sealed connected to the last filter unit.

[0027] (2) The clean water outlets of the plurality of filter units are connected in parallel and sealed to the clean water pipe 7 equipped with a clean water flow meter 10 .

[0028] (3) The backwash pipe openings of the plurality of filter units are connected in parallel and sealed to the backwash connecting pipe 5 .

[0029] (4) Wastewater enters from the raw water feed pipe 1, exits from the concentrated water connecting pipe 8, and clean water exits from the clean water pipe 7. The sum of the clean water flowmeter 10 and the outlet water flowmeter 9 is equal to the flow value of the inlet water flowmeter 2. The inlet water pressure is adjusted, and the pressure gauge 3 is displayed to adjust the wastewater reduction ratio to 70-80%. That is, the concentrate outlet flow rate is 70-80% of the inlet water flow rate.

Claims

1. A tubular reduction filter device, characterized in that: The raw water feed pipe is tightly connected to the inlet and outlet pipes of the first filter unit through a water inlet flowmeter and a pressure gauge; the outlet water connecting pipe port of the first filter unit is tightly connected in series with the following filter units in sequence; the outlet water connecting pipe port of the last filter unit is tightly connected to the concentrated water connecting pipe through a concentrated water flowmeter; a backwash pipe port is installed on the filter tube wall of each filter unit; the backwash pipe is tightly connected in parallel through the backwash pipe ports of each filter unit in sequence; a clean water discharge pipe port is installed under the filter tube wall of the filter unit; the clean water discharge pipe ports are tightly connected to the clean water discharge pipe in sequence in parallel through a clean water flowmeter.

2. A tubular filter device according to claim 1, characterized in that: In the filter unit, the raw water feed pipe is connected to the filter medium mesh pipe, a filter unit backwash pipe is arranged outside the filter medium mesh pipe, a backwash pipe port is installed on the filter pipe wall of the filter unit, and a clean water discharge pipe port is installed under the filter pipe wall of the filter unit.

3. A tubular filter device according to claim 1, characterized in that: The filtering unit is an array.

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