Particle medium filtering device

Abstract

The utility model provides a granular medium filtering device which comprises a water tank, the water tank consists of a vertical tank wall and a conical tank wall, the bottom of the conical tank wall is funnel-shaped, and the conical tank wall comprises a filtering bed consisting of loose granular filtering media; the water inlet pipeline is connected to a series of radially distributed water outlets and is used for introducing dirty washing water into the filter bed; grid control balls are concentrically distributed in the filter bed; the purified water with pollutants removed flows out of the top of the filter bed and flows through a washing weir, the washing weir is connected with an outlet pipeline, and the outlet pipeline conveys the purified water out of the water tank; the bottom of the water tank is connected to a transport pipeline, the transport pipeline takes the filter medium combined with the dirt out of the water tank and then is connected to an inline shear, the inline shear is subsequently connected with a transport pump, and when the dirt filter medium passes through the transport pump, pollutants combined with the filter medium partially fall off under the action of the transport pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to a granular medium filtering device. BACKGROUND

[0002] In the traditional liquid purification process, a commonly adopted method is to use a filter to remove solid particles suspended in the liquid. This process involves allowing the liquid to flow through a filter media layer in a vertically downward direction (i.e. from the top in, from the bottom out). As the liquid passes through the pores of these media, solid particles, due to their larger size, are unable to pass through the interstices of the filter media, and are thus captured by the surface or internal structure of the media. In this way, solid particles are effectively separated from the liquid, thereby achieving the purpose of purifying the liquid. The core component of the filter is the filter media layer, which is composed of particles with a specific pore size. These filter media can be sand, activated carbon, ceramic, metal mesh, etc., which achieve the interception of particles of different sizes through different pore sizes. As the filtration process progresses, the media layer captures more and more solid particles until it reaches a saturated state. At this point, the media bed will be unable to capture more suspended solids, and the resistance to water flow through the filter layer will increase, and the filter will be unable to continue normal operation. In order to restore the filtration performance, the filter must be backwashed. The backwashing process usually has gas washing, water washing and gas-water combined washing, and the gas-water combined washing is the most common in engineering. The process of gas-water combined washing is to first introduce compressed gas to wash the media layer, so that the impurities in the media layer are loosened. After a period of gas washing, water flow is introduced at the same time to remove solid impurities for a period of time (usually more than ten minutes). Before the filter is put into formal use, it will also be subjected to maturation operation, which will carry out a series of operations such as wetting the filter media, circulating operation, preliminary backwashing, etc. Thus the filter can achieve the best filtration effect and state.

[0003] However, the traditional liquid filtration and purification technology has some significant drawbacks. First, the traditional filtration efficiency is limited by the filter media, such as sand filtration, activated carbon filtration, etc., which usually cannot effectively remove small particles and dissolved substances in water, especially for particles with a particle size of less than 1 μm, the filtration effect is poor. Second, the traditional filtration technology can cause an increase in the content of microorganisms in the filtered water, because as the use time increases, more and more bacteria grow inside the filtration equipment. If the filter cartridge of the water purifier is not replaced in time, it may become a "dirty water purifier", causing secondary pollution of the water quality, which requires regular manual disassembly and cleaning to ensure normal operation of the machine. This causes the normal filtration work to be suspended, reducing the productivity of the filtration system.

[0004] To solve these problems, some new patents have proposed the design of continuous filtration devices. For example, by making the liquid flow countercurrent through the filter, the dirty sand is sent to a washing device for cleaning using an air pump. These innovative designs have solved the limitations of traditional equipment to some extent and have been commercially applied worldwide. However, there are still some shortcomings in the cases of these patent implementations, such as the inability of the cleaning device to completely clean the filter medium, resulting in relatively poor filtration effect.

[0005] In summary, traditional liquid purification techniques have played an important role in achieving solid particle and liquid separation, but at the same time, they also face challenges such as discontinuous filtration process, high maintenance cost, and limited filtration effect. Practical new type content

[0006] The purpose of the present application is to provide a granular medium filtration device that realizes a more continuous and efficient liquid purification process.

[0007] To solve the above technical problems, the present application provides a granular medium filtration device, comprising: a water tank composed of a vertical tank wall and a conical tank wall, the bottom of the conical tank wall being funnel-shaped, containing a filter bed composed of loose granular filter medium;

[0008] The water inlet pipe is connected to a series of radially distributed drainage outlets for introducing dirty washing water into the filter bed; the grid control balls are concentrically distributed in the filter bed;

[0009] The clean water that removes pollutants flows out from the top of the filter bed, flows through a washing weir, and the washing weir is connected to an outlet pipe that delivers the clean water out of the water tank;

[0010] The bottom of the water tank is connected to a transport pipe that takes the filter medium that has combined with the contaminants out of the water tank, and is subsequently connected to an inline shear that breaks the combination between the filter medium and the contaminants and discharges the contaminants from the filter medium, the inline shear is subsequently connected to a transport pump, and when the dirty filter medium passes through the transport pump, the contaminants combined with the filter medium partially fall off under the action of the transport pump; the mixture of the filter medium and the contaminants is discharged from the transport pump and transported to a separation device.

[0011] In a preferred embodiment: the radially distributed drainage outlets are concentrically located at the vertical bottom of the filter bed.

[0012] In a preferred embodiment: the separation device is a hydrocyclone or a cyclone separator.

[0013] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0014] The utility model provides a kind of granular medium filtering device, more continuous, more efficient liquid purification process can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the vertical section view of the filter involved in the first embodiment.

[0016] Legend: 51 - water tank; 52 - water inlet pipe; 53 - radially distributed drainage; 54 - filter bed; 55 - transport pipe; 56 - transport pump; 57 - inline shear; 58 - hydrocyclone inlet; 59 - hydrocyclone overflow outlet; 60 - hydrocyclone discharge pipe; 61 - wash water weir; 62 - outlet pipe; 63 - hydrocyclone discharge waste (i.e. sludge); 64 - hydrocyclone discharge filter media; 65 - filter media; 66 - clean water; 67 - hydrocyclone; 68 - tank wall; 69 - dirty wash water; 70 - filter media bound to dirt; 71 - grid control ball;

[0017] → arrow indicates the direction of liquid or dirty material flow DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model; Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0019] In the description of the utility model, it should be explained that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be wall-mounted connection, can be detachable connection, or integrally connected, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through intermediate medium, can be the communication between two elements, and those skilled in the art can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0021] Figure 1 A granular media filter designed according to one embodiment of the present application is shown, comprising a water tank 51, the water tank 51 is composed of vertical tank walls and conical tank walls, the bottom of the conical tank walls is funnel-shaped, containing a filter bed composed of loose granular filter media. After washing, the washing water enters through the water inlet pipe 52, the water inlet pipe 52 is connected to a series of radially distributed drainage outlets 53, which introduce the dirty washing water 69 into the filter bed 54. The radially distributed drainage outlets 53 are concentrically located at the vertical bottom of the filter bed 54, which can ensure that the dirty washing water 69 is evenly distributed in the filter bed 54. The filter media layers in the conical tank wall are in close contact, the closer to the bottom, the tighter the filter media layer, the flowing liquid penetrates downward and is blocked, and the concentrically distributed grid control balls 71 are controlled in the filter bed 65. The function of the grid control ball 71 is to separate the filter media, so that there is a certain space between the filter media 65, and the filter media bed cannot be in close contact. Therefore, the dirty washing water 69 can break through the blockade of the filter bed 54, which makes the dirty washing water 69 discharged by the distributed drainage outlet flow upward. The dirty washing water 69 flows upward while the filter media particles move downward to the bottom of the water tank 51, and the pollutants in the dirty washing water 69 are effectively removed by the filter media in this countercurrent motion. The clean water 66 after removing the pollutants flows out from the top of the filter bed 54, flows through a washing weir 61, and the washing weir 61 is connected with an outlet pipe 62, and the outlet pipe 62 delivers the clean water 66 out of the water tank 51.

[0022] During the countercurrent motion, the dirty washing water 69 contacts the filter media at the vertical bottom of the filter bed 54, the filter media combines with the dirty substances in the water to separate them from the water, so the filter media becomes dirty. The bottom of the water tank is connected to a transport pipe 55. The transport pipe 55 takes out the filter media 70 that has combined with the stains from the water tank 51. Subsequently connected to an inline shear 57, the inline shear 57 breaks the combination between the filter media and the pollutants, and discharges the pollutants from the filter media, improving the subsequent cleaning efficiency of the filter media, and the inline shear 57 is subsequently connected with a transport pump 56, and when the dirty filter media passes through the transport pump 56, the pollutants combined with the filter media are partially detached under the action of the transport pump 56. After the mixture of filter media and pollutants is discharged from the transport pump 56, it is delivered into a hydrocyclone 67.

[0023] The mixture of filter media and pollutants enters from the hydrocyclone inlet 58, and then under the action of the hydrocyclone 67, the filter media and the pollutants will be more thoroughly separated. The waste 63 discharged by the hydrocyclone is discharged from the hydrocyclone outlet pipe 62, and the filter media flows down from the overflow outlet 59 of the hydrocyclone and enters the hydrocyclone discharge pipe 60, and then the filter media that has recovered the filtering function is refilled into the filter bed to start the next stage of filtration.

[0024] The above merely describes preferred specific embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent transformation using the content of the present application specification shall fall within the protection scope of the present application.

Claims

1. A particulate media filter apparatus, characterized by Comprising: a water tank comprised of vertical tank walls and conical tank walls, the bottom of the conical tank walls being funnel shaped, containing a filter bed comprised of loose granular filter media; an inlet pipe connected to a series of radially distributed drain ports for introducing dirty water into the filter bed; a concentrically distributed grid within the filter bed; clean water, free of contaminants, flows out of the top of the filter bed, through a wash water weir, the wash water weir being connected to an outlet pipe that delivers the clean water out of the water tank; the bottom of the water tank is connected to a transport pipe that removes the filter media that has bound with the contaminants out of the water tank, followed by a connection to an inline shear that breaks the bond between the filter media and the contaminants and expels the contaminants from the filter media, the inline shear being followed by a connection to a transport pump, the contaminants that are bound with the dirty filter media being partially dislodged by the transport pump as the filter media passes through the transport pump; the mixture of filter media and contaminants is discharged from the transport pump and delivered to a separation device.

2. A particulate media filter apparatus according to claim 1, wherein: the radially distributed drain ports are concentrically located at the vertical bottom of the filter bed.

3. A particulate media filter apparatus as claimed in claim 1, wherein: the separation device is a hydrocyclone or a cyclonic separator.

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