Diatomite filter bag and filter device

Abstract

The utility model belongs to the field of filtration, and particularly relates to a diatomite filter bag and a filter device. The diatomite filter bag comprises a bag body and a flow guide pipe arranged in the bag body; the bag body comprises a diatomite protective layer, a filter layer and a runner layer which are connected in sequence; the diameter of meshes of the diatomite protection layer is smaller than the particle size of diatomite; and a plurality of holes are formed in the outer wall of the flow guide pipe and are communicated with the flow channel layer. The bag body is simple in preparation method, capable of achieving double-face filtering, large in filtering area and easy and convenient to install; when the precoating is too thick and external pressure is not enough to complete filtration, the bag body can be taken down, the diatomite precoating on the surface is scraped off, and the bag body can be continuously used after being cleaned, so that the bag body can be recycled.

Description

Technical Field

[0001] The utility model belongs to the field of filtration, and in particular relates to a diatomaceous earth filter bag and a filter device. Background Art

[0002] Diatomaceous earth filter refers to a filtering device that uses diatomaceous earth as the main medium and utilizes the fineness and porosity of diatomaceous earth particles to remove suspended particles, colloids and other impurities in swimming pool water.

[0003] Diatomaceous earth filtration refers to a coating filter with diatomaceous earth coating as the filter layer, which mainly uses mechanical screening to treat water containing tiny suspended solids. The core part of the filter is composed of three parts: filter screen, support screen and outer frame. Each filter element is a perforated tube as the skeleton, with wire wrapped on the outer surface and diatomaceous earth coating on the wire. The filter element is fixed on the partition, and the upper and lower parts of the partition are the raw water chamber and the clean water chamber.

[0004] The diatomaceous earth filter in the prior art is composed of a plurality of groups of filter frames arranged in combination. The filter plate assembly includes filter plate frames at both ends and filter materials stacked in the filter plate frames. The filter plate frames include two clamping plates arranged in parallel and spaced relation and a screw connected between the two clamping plates. The screw applies a pulling force to the two clamping plates to clamp the filter materials between the clamping plates for filtering. However, the screw is usually heavy and inconvenient to install. Utility Model Content

[0005] The utility model aims to overcome the defects in the prior art and provide a diatomaceous earth filter bag and a filter device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A diatomaceous earth filter bag comprises a bag body and a flow guide tube arranged in the bag body; the bag body comprises a diatomaceous earth protective layer, a filter layer and a flow channel layer connected in sequence; the mesh diameter of the diatomaceous earth protective layer is smaller than the particle size of the diatomaceous earth; a plurality of holes are arranged on the outer wall of the flow guide tube to communicate with the flow channel layer.

[0008] The pore sizes of the diatomite protective layer, the filter layer and the flow channel layer are in the following relationship: filter layer < diatomite protective layer < flow channel layer;

[0009] The bag body is provided with sutures.

[0010] The top of the bag body is provided with a mounting piece.

[0011] The upper part and the lower part of the bag body are provided with hanging parts.

[0012] The utility model also comprises a filtering device, comprising a filtering pool and a plurality of diatomaceous earth filtering bags arranged in the filtering pool; a mixture of liquid to be filtered and diatomaceous earth is arranged in the filtering pool.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The solution of the utility model uses a diatomaceous earth protective layer, a filter layer and a flow channel layer to be sewn together to preform a bag body, and a guide tube is added to the bag body; when in use, it is hung in a filter pool, and a mixture of the liquid to be filtered and the diatomaceous earth in the filter pool flows out through the bag body and the guide tube under the action of external pressure, completing the pre-coating of diatomaceous earth on the diatomaceous earth protective layer, and dynamically forming a diatomaceous earth pre-coating layer on the surface of the bag body. The diatomaceous earth pre-coating layer is firm, and the preparation method of the bag body is simple, and double-sided filtering can be achieved, the filtering area is large, and the installation is simple and convenient; when the pre-coating layer is too thick and the external pressure is insufficient to complete the filtering, the bag body can be removed, the diatomaceous earth pre-coating layer on the surface can be scraped off, and the bag body can be continuously used after cleaning, so that the bag body can be recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the diatomaceous earth filter bag of the utility model;

[0016] Figure 2 , 3 They are respectively cross-sectional views of the diatomaceous earth filter bag of the utility model. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment.

[0018] Figure 1-3 A diatomaceous earth filter bag is shown, comprising a bag body and a flow guide tube 4 arranged in the bag body; the bag body comprises a diatomaceous earth protective layer 3, a filter layer 2 and a flow channel layer 1 connected in sequence; the diameter of the holes of the diatomaceous earth protective layer is smaller than the particle size of the diatomaceous earth so that the diatomaceous earth can be pre-coated on the diatomaceous earth protective layer 3;

[0019] As one of the implementation forms, the pore size relationship of the mesh of the diatomite protective layer, the filter layer and the flow channel layer is: filter layer < diatomite protective layer < flow channel layer; the diatomite protective layer of the present application adopts polyester single-sided velvet cloth to ensure that the diatomite is firmly attached and prolong the service life. The air permeability of the polyester single-sided velvet cloth used in the diatomite protective layer is 74 liters / square meter / minute. The filter layer adopts polypropylene long fiber cloth to achieve good permeability, and the air permeability of the filter layer adopts polypropylene long fiber filter cloth is 15 liters / square meter / minute. The flow channel layer adopts honeycomb mesh cloth, and the pore size of the mesh cloth is 0.5*0.55mm.

[0020] The outer wall of the guide pipe is provided with a plurality of holes which are connected with the flow channel layer to form a water flow channel.

[0021] The bag body is provided with sutures 9, which sew the diatomaceous earth protective layer 3, the filter layer 2 and the flow channel layer 1 together to form the bag body.

[0022] A mounting member 7 is provided on the top of the bag body.

[0023] The upper and lower parts of the bag body are provided with hanging parts 8.

[0024] The utility model also comprises a filtering device, comprising a filtering pool and a plurality of diatomaceous earth filtering bags arranged in the filtering pool; a mixture of filtering liquid and diatomaceous earth is arranged in the filtering pool.

[0025] The application principle of the present invention is as follows: when in use, multiple diatomaceous earth filter bags are hung in the filter pool through the mounting member 7, and the mixture of the liquid to be filtered and the diatomaceous earth in the filter pool flows out through the bag body and the guide pipe under the action of external pressure, and the diatomaceous earth adheres to the surface of the diatomaceous earth protective layer, completing the pre-coating of the diatomaceous earth on the diatomaceous earth protective layer. This method can dynamically form a diatomaceous earth pre-coating on the surface of the bag body, and the diatomaceous earth pre-coating is firm; coupled with the bottom-up clean liquid recovery principle, not only the smooth recovery of the clean liquid is guaranteed, but also the pressure difference is stable during the entire filtering process. The filtering effect is better.

[0026] In addition, the bag body is simple to prepare, can be used for double-sided filtration, has a large filtration area, and is easy and convenient to install; when the pre-coating layer is too thick and the external pressure is insufficient to complete the filtration, the bag body can be removed, the diatomaceous earth pre-coating layer on the surface can be scraped off, and it can be continued to be used after cleaning, so that the bag body can be recycled.

[0027] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A diatomaceous earth filter bag, characterized in that: It comprises a bag body and a flow guide tube arranged in the bag body; the bag body comprises a diatomaceous earth protective layer, a filter layer and a flow channel layer connected in sequence; the mesh size of the diatomaceous earth protective layer is smaller than the particle size of the diatomaceous earth; a plurality of holes are arranged on the outer wall of the flow guide tube to communicate with the flow channel layer.

2. The diatomaceous earth filter bag according to claim 1, characterized in that: The relationship between the pore sizes of the diatomaceous earth protective layer, the filter layer and the flow channel layer is: filter layer < diatomaceous earth protective layer < flow channel layer.

3. The diatomaceous earth filter bag according to claim 1, characterized in that: The bag body is provided with sutures.

4. The diatomaceous earth filter bag according to claim 1, characterized in that: The top of the bag body is provided with a mounting piece.

5. The diatomaceous earth filter bag according to claim 1, characterized in that: The upper part and the lower part of the bag body are provided with hanging parts.

6. A filtering device, characterized in that: It comprises a filter pool and a plurality of diatomaceous earth filter bags according to any one of claims 1 to 5 arranged in the filter pool; a mixture of liquid to be filtered and diatomaceous earth is arranged in the filter pool.

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