Forced cleaning quicksand filter

Abstract

According to the powerful cleaning quicksand filter, the filter is of a closed structure, and fluid enters from the bottom and flows out from the top; a combination of a water pump and a water ejector is adopted for conveying and cleaning a filter material to provide power, mixed water is firstly adopted for conveying, cleaning and desorption of the filter material, and then filtered clean water is adopted for rinsing in a separator; due to the fact that a plurality of combination modes are adopted for strongly cleaning the filter material, the cleaning effect is guaranteed. Therefore, a 0.1-0.3 mm micro sand filter material can be adopted, the filtering precision is greatly improved, and the use of viscous suspended matter water can be met.

Description

Technical Field

[0001] This invention belongs to the field of solid-liquid separation and relates to a powerful cleaning fluidized bed filter. It is widely used in devices for removing suspended solids and achieving high-precision filtration in wastewater treatment, water purification, and liquid treatment. This invention can solve the problem that existing fluidized bed filters cannot use micro-filter media due to inadequate cleaning, resulting in low filtration accuracy. Background Technology

[0002] Existing sand filters all use airlift sand conveying to circulate and clean the filter media. This method has the following drawbacks: it cannot use small filter media, resulting in limited filtration accuracy; and it has poor cleaning effect on viscous suspended solids, resulting in low filtration efficiency. Summary of the Invention

[0003] To address the aforementioned problems of existing moving bed filters, this invention provides a powerful cleaning fluidized bed filter that perfectly solves these issues. The main design concept of this invention is to utilize a combination of a water pump, ejector, and piping to create a powerful flow of water mixed with filter media and suspended solids. This results in intense friction and contact between filter media, between filter media and piping, and between filter media and the water flow, achieving desorption of suspended solids and colloids from the filter media. The filtered water then separates the filter media from the suspended solids. By employing this method, the problems of existing fluidized bed filters can be completely resolved.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] The present invention relates to a powerful cleaning sand filter, comprising a tank 1, filter media 2, sand guide 3, water distribution pipe 4, water inlet pipe 5, sand outlet pipe 6, water outlet pipe 7, separator 8, cleaning pump 9, water jet 10, mixing and conveying pipe 11, sewage outlet 12, mixing and return pipe 13, and a control system.

[0006] The powerful cleaning sand filter is characterized by: the filter having a closed structure and being able to withstand internal pressure; the fluid entering from the bottom and exiting from the top; and the filter media moving from the top to the bottom.

[0007] The powerful cleaning sand filter is characterized in that: the conveying and cleaning of the filter media is powered by a combination of a water pump and a water jet, and the filter media is desorbed and separated from suspended solids in the jet, pipeline and separator.

[0008] The powerful cleaning sand filter is characterized by the following: the filter media is conveyed and the cleaning and desorption are first carried out using mixed water, and then rinsed in the separator using the filtered water; the flow rate and velocity of the mixed water and the rinsing water are adjusted respectively. Attached Figure Description

[0009] The attached figure is a schematic diagram of the overall structure of a powerful cleaning sand filter according to the present invention.

[0010] The present invention will be further described below with reference to the accompanying drawings.

[0011] As shown in the attached figure, the present invention provides a powerful cleaning sand filter, comprising a tank 1, filter media 2, sand guide 3, water distribution pipe 4, water inlet pipe 5, sand outlet pipe 6, water outlet pipe 7, separator 8, cleaning pump 9, water jet 10, mixing conveying pipe 11, sewage outlet 12, mixing return pipe 13, and control box.

[0012] The filter workflow is as follows:

[0013] Main filtration process: The liquid to be treated enters the tank 1 through the inlet pipe 5, then passes through the filter layer 2 via the distribution pipe 4 and finally reaches the outlet pipe 7, thus completing the main filtration process.

[0014] Filter media cleaning process: Open the bottom outlet control valve of the tank, open the sewage outlet valve, open the valves on the mixing conveying pipe and the mixing return pipe, and start the cleaning pump 9; Cleaning pump 9

[0015] After being pressurized by the mixing return pipe 13 on separator 8, water is pumped into water jet 10. Under the action of the water jet, the filter media containing suspended solids and impurities at the bottom of the moving bed enters the cleaning jet through the sand outlet 6 and mixes with the water flow in the jet. After strong stirring, friction, and contact, they enter the mixing conveying pipe 11 together. In the mixing conveying pipe 11, the filter media, suspended solids and impurities, and water are once again strongly stirred, contacted, and rubbed. The suspended solids and impurities are desorbed from the filter media and enter the mixing conveying pipe 11 together. In separator 8, the filter media falls downwards into tank 1 due to inertia and gravity to participate in the next cycle. Water containing suspended solids and impurities is partially discharged from the tank through drain port 12, while the remaining mixed water enters the cleaning pump 9 through mixing return pipe 13. Due to the internal pressure of the tank, the filter media is rinsed by the upward-flowing filtered water as it falls into tank 1. The rinsed water, along with the remaining mixed water, enters the mixing return pipe 13 and then the cleaning pump 9. The amount of rinsing water is controlled by the internal pressure of the tank and the drain valve 12.

[0016] This invention discloses a powerful cleaning sand filter, which can powerfully clean the filter media by using one or more of the following methods in combination, depending on the particle size of the filter media and the viscosity and content of suspended solids in the water: first, by controlling the flow rate and pressure of the cleaning pump to enhance the cleaning of the filter media; second, by setting a static mixer and a turbulence generator in the mixing and conveying pipe 13 section to enhance the cleaning of the filter media; and third, by controlling the amount of clean water for rinsing by controlling the drain valve 12 to enhance the cleaning effect.

[0017] The present invention provides a powerful cleaning sand filter with the following advantages: it can use micro-filter media to improve filtration accuracy; it can solve the problem of cleaning viscous suspended solids and widely meet the needs of difficult-to-treat industrial wastewater.

Claims

1. A high-powered cleaning sand filter, comprising a tank, filter media, sand guide, water distribution pipe, water inlet pipe, sand outlet pipe, water outlet pipe, separator, cleaning pump, water jet, mixing and conveying pipe, wastewater outlet, mixing and return pipe, and control system, characterized in that: The filter is a closed structure and withstands internal pressure. Fluid flows from bottom to top, and the filter media moves from top to bottom. The transport and cleaning of the filter media are powered by a combination of water pumps and water jets. The filter media undergoes desorption and separation from suspended solids through the water jets, pipelines, and separators. The transport, cleaning, and desorption of the filter media first uses mixed water, then rinses with filtered water in the separator. Based on the particle size of the filter media and the viscosity and content of suspended solids in the water, one or more of the following methods are used for intensive cleaning: 1) Intensifying filter media cleaning by controlling the flow rate and pressure of the cleaning pump; 2) Intensifying filter media cleaning by installing a static mixer and turbulence generator in the mixing and transport pipeline section; 3) Enhancing the cleaning effect by controlling the amount of purified water used for rinsing through the drain valve.

2. The powerful cleaning sand filter according to claim 1, characterized in that: There are two ways to clean filter media: one is continuous online cleaning, and the other is periodic cleaning.

3. The powerful cleaning sand filter according to claim 1, characterized in that: The tank has a closed structure and is subjected to internal pressure during operation, with a pressure of 0.1-0.3 MPa.

4. The powerful cleaning sand filter according to claim 1, characterized in that: Homogeneous filter media with a particle size range of 0.1-2mm is used.

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