JPH04106695U - Filtration device - Google Patents

Abstract

(57) [Summary] [Purpose] Using fibrous activated carbon as a filter medium, it also serves as a filter for preventing clogging of a filtration membrane, and further reduces clogging of the entire filter medium, thereby extending its life. [Structure] The fibrous activated carbon layer 2 is characterized in that it has a multilayer structure such as a felt-like material 3 and a molded material 4, the mesh size of which gradually decreases from the upstream side to the downstream side.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to filtration devices used in water purifiers, etc., and particularly relates to activated carbon layers and filters. It relates to a combination with a membrane.

0002

[Conventional technology]

As a conventional filtering device of this kind, there is one shown in FIG. 2, for example. figure The configuration shown is an example of a water purifier. Normally, water purifiers remove off-taste and odors such as chlorine (residual chlorine). Activated carbon layer 101 for filtering and filter membrane 100 for removing particulate components such as suspended matter and bacteria. It is common to use two types of filter materials. Generally determines the lifespan of the water purifier As a factor, activated carbon may become saturated and it may become impossible to remove off-flavors such as limescale. However, there is a serious problem of flow rate reduction due to clogging of the filtration membrane 100 and activated carbon layer 101. , a separate filter is installed to capture solids to reduce flow rate reduction due to clogging. It was clear.

0003

[Problem that the idea aims to solve]

However, in the case of the above-mentioned conventional technology, it is necessary to provide a filter, and the structure Problems arise, such as the structure becoming more complex and the flow path resistance increasing.

0004 On the other hand, the activated carbon layer 101 is made of high-performance fiber with the aim of downsizing water purifiers. The use of fibrous activated carbon is increasing. This fibrous activated carbon is dense, so In addition to the function of removing off-flavors such as limescale, it also has the function of filtering solid particle components. If we focus on hyperfunction, it may be possible to use it as a filter, but fibrous active The flow rate also decreased due to clogging of the charcoal itself, which caused problems in terms of extending the service life.

[0005] There are roughly three types of fibrous activated carbon.

[0006] The first type is made of fibrous activated carbon fibers made into fluff, and the second type is as shown in Figure 3(a). Sea urchin fibers were molded into a felt shape, and the third one was molded as shown in Figure 3(b). It is something.

[0007] Among these, the first cotton-like material is difficult to make into a cartridge, so it is not easy to use. The felt-like material 102 in FIG. 3(a) and the material in FIG. 3(b) are A mold 103 is used.

[0008] In FIG. 4, a felt-like material 102 of fibrous activated carbon is used as the activated carbon layer 101. The water flow characteristics of the water purifier using the molded product 103 and the case of using the molded product 103 are compared. The characteristic curve A when the felt-like material 102 is used is better than the characteristic curve A when the molded material 103 is used. It can be seen that the flow rate is less likely to decrease than in characteristic curve B. This is the molded product 103. In this case, the pore size of the filtration pores is small and most of the particle components are captured, so molded product Table 103 While the degree of increase in particle components deposited on the surface is large, in the case of the felt-like material 102 Although the pore diameter of the filter pores is larger than that of the molded product 103 and captures some particulate components, A considerable portion passes through and is captured by the filter membrane 100, and the captured particle components are This is considered to be because the particles are dispersed in the funnel-like material 102 and the filter membrane 100. However, this frame In the case of the belt-like material 102, the damage to the filtration membrane 100 is large, and the However, there was a problem with its durability.

[0009] The present invention has the above structure and function, and its purpose is to Fibrous activated carbon is used as a filter to prevent clogging, and We are developing a filtration device that can reduce clogging of the entire filtration material, including the filtration membrane, and extend its service life. It is about providing.

0010

[Means to solve the problem]

In order to achieve the above purpose, the present invention eliminates turbidity and fine particles in the fluid to be filtered. A filtration device with a fibrous activated carbon layer on the upstream side of a filtration membrane that removes particulate components such as bacteria. The fibrous activated carbon layer is made so that the mesh size gradually decreases from the upstream side to the downstream side. It is characterized by a multi-layered structure that becomes thinner.

[0011] This fibrous activated carbon layer consists of a felt-like material made of fibrous activated carbon and a molded material. It has a two-layer structure, with the felt-like material placed on the upstream side, and the felt-like material placed on the upstream side. It is effective to arrange the molded product as a stage on the downstream side.

0012

[Effect]

In the filtration device with the above configuration, the fluid to be filtered passes through the fibrous activated carbon layer. In between, particle components are captured in order from coarse particles, and the particle components are dispersed in the fibrous activated carbon layer. captured. Therefore, the particles embedded in each layer of the fibrous activated carbon layer and the filtration membrane The degree of component accumulation is reduced and clogging is reduced.

[0013]

【Example】

The present invention will be explained below based on the illustrated embodiments. Figure 1 shows the filtration device of the present invention. This shows a water purifier according to an embodiment, and schematically shows a filtration membrane 1 and an upstream side of this filtration membrane 1. and a fibrous activated carbon layer 2 arranged in series.

[0014] The structure of the filtration membrane 1 is, for example, a hollow fiber made by bundling a large number of hollow fiber membranes as shown in the figure. A membrane module may be used, and various other filtration membranes may be applied.

[0015] The fibrous activated carbon layer 2 has a filtration function, and the fibrous activated carbon layer 2 has a filtering function, and the fibrous activated carbon layer 2 has a filtering function. It has a multi-layered structure whose size gradually decreases.

[0016] In this example, the fibrous activated carbon layer 2 is made of a felt-like material 3 similar to that shown in FIG. It has a two-layer structure consisting of a molded article 4 and a molded article 4 formed by molding. Then put felt-like material 3 on top. The molded product 4 is placed on the downstream side as the next step.

[0017] Therefore, as a filter material, from the upstream side, the felt material 3, the molded material 4, and the filter material are The filter membranes are arranged in the order of 1, and the size of the mesh, that is, the size of the filter holes, is The molded material 3 is the coarsest, and the molded material 4 and the filter membrane 1 are finer in that order.

[0018] In this example, a two-layer structure is used, but a multi-layer structure of three or more layers is used from the upstream side. It is also possible to have a structure in which the meshes are arranged in order of increasing coarseness.

[0019] Furthermore, as the fibrous activated carbon, the cotton-like one described in the prior art can also be used. , there is no problem in using it except for the problem of making it into a cartridge.

[0020] In the water purifier with the above configuration, off-flavors such as limescale are removed by the fibrous activated carbon layer 2. It is adsorbed and removed through the tray 3 and molded material 4, and particulate components such as suspended solids and bacteria are removed. is removed by the felt-like material 3 and the molded material 4, but is not completely removed by the filtration membrane 1. The raw water is then filtered.

[0021] The particle components in the raw water are sequentially divided into felt-like materials 3, molded materials 4, and The felt material 3, the molded material 4 and the filtration material are dispersed and captured by the filtration membrane 1. The amount deposited on the surface of membrane 1 is smaller than that of a conventional single-layer fibrous activated carbon layer. Therefore, clogging of the water purifier as a whole can be reduced, and the characteristic curve shown in Figure 4 can be reduced. As shown by line C, we were able to achieve a longer life.

[0022] In this example, a water purifier was used as an example, but it is not limited to water purifiers, and can be applied to various types of water purifiers. It can be widely used in body filtration.

[0023]

[Effect of the idea]

The present invention has the above-mentioned structure and function, and uses a dense fibrous activated carbon layer as a filament. can function as a filter, eliminating the need for conventional filters to prevent clogging. I can do that.

[0024] In addition, the grain size of the fibrous activated carbon layer gradually decreases from the upstream side to the downstream side. By creating a multi-layered structure, each particle component captured in the fibrous activated carbon layer itself is It can be dispersed in layers, and the life of the entire filtration device can be extended.

[Brief explanation of drawings]

FIG. 1 is a diagram schematically showing the configuration of a filter material of a filtration device according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing the configuration of a filter material of a conventional filtration device.

[Figure 3] Figure 3 shows conventional fibrous activated carbon.
(a) is a felt-like one, and (b) is a schematic perspective view of a molded one.

FIG. 4 is a graph comparing the flow rate reduction characteristics of the present invention and a conventional filter device.

[Explanation of symbols]

1 Filtration membrane 2 Fibrous activated carbon layer 3 Felt-like material 4 Molded object

Claims (2)

[Scope of utility model registration request] Claim 1: A filtration device in which a fibrous activated carbon layer is disposed upstream of a filtration membrane that removes particulate components such as suspended solids and bacteria from a fluid to be filtered, wherein the fibrous activated carbon layer is arranged from an upstream side to a downstream side. A filtration device characterized by having a multilayer structure in which the size of the eyes gradually decreases toward . 2. The fibrous activated carbon layer has a two-layer structure consisting of a felt-like material made of fibrous activated carbon and a molded product, and the felt-like material is placed on the upstream side, and then the felt-like material is placed on the upstream side. The filtration device according to claim 1, wherein the molded product is arranged as a stage on the downstream side.