KR101289893B1 - Water treatment device for preventing breakup of filter layer - Google Patents

Abstract

PURPOSE: A filtering device is provided to remove fine filtering dust and foreign materials precipitated in filtering materials based on magnetic forces in a backwashing process. CONSTITUTION: A filtering device consists of a housing (110), a lower filtering layer (120), an upper filtering layer (130), and a magnet (140). The lower filtering layer is based on magnetic filtering materials. The magnet is adjacent to the lower filtering layer. The upper filtering layer is based on filtering materials having larger particle sizes and lower specific gravity than the particle sizes and the specific gravity of filtering materials in the upper filtering layer. A second magnet is arranged on the upper side of the upper filtering layer. The magnet and the second magnet are electromagnets which are in electric connection with a power supply. The second magnet generates a magnetic force only when a backwashing line (160) operates. After the second magnet generates the magnetic force, the magnet generates a magnetic force before and after the termination of the backwashing operation. When a filtering line operates, no magnetic force is generated. The second magnet is in a net form. Meshes of the net are smaller than the filtering materials in the upper filtering layer. Filtering materials in the upper filtering layer are blocked by the second magnet in the backwashing process.

Description

Water treatment device for preventing breakup of filter layer

The present invention relates to a filtration device, and to a filtration device that can prevent the dispersion between filter media to prevent the filtration efficiency is lowered due to the disturbance of the interlayer media during filtration and backwashing by specific gravity and magnetic force.

In a variety of sewage and waste water, a filtration device is used to filter out foreign substances such as sludge contained in water for the treatment of foreign substances such as sludge in the pre-treatment before the advanced treatment and the treatment of water purification or recycling.

The filtration device used for the above purpose physically filters out foreign substances such as sludge with larger particles than the gap due to the gap of the filter media performing filtration. There is a problem, and for this, cleaning (washing) of the filter medium is required, and thus, a number of techniques have been proposed in which a backwashing function can be provided in the filtering device.

On the other hand, in the filtration device, a number of techniques have been proposed to physically or chemically increase the filtration efficiency by allowing a layer to be formed between heterogeneous media to increase the filtration efficiency.

However, in the case of a filtration device that allows a layer to be formed between heterogeneous media, disturbance of the media layer occurs during backwashing, resulting in a decrease in efficiency during filtration after backwashing, or problems such as clogging leading to equipment failure. have.

As a technique for solving this, Korean Patent Registration No. 1041411 has been proposed. In the above technique, the construction of the flat compaction unit is suggested to return the filter media layer that has been disturbed due to the operation of the flat compaction unit after backwashing. .

However, even in the case of the above technique, there is a problem in that the disturbance between media layers generated during backwashing cannot be completely controlled only by the operation of the flat compaction unit, which eventually leads to a decrease in filtration efficiency.

Republic of Korea Patent Registration No. 1041411

Therefore, the present invention is to solve the above-mentioned problems, while preventing the occurrence of disturbances in the filter media layer during backwashing by the specific gravity of the filter media itself and the magnetic force to arrange the filter media while forming a plurality of filter media layers, thereby preventing filtration efficiency. It is intended to provide a filtering device for preventing inhibition.

A filtration device (hereinafter referred to as a "filtration device") for preventing dispersion between media according to a problem to be solved of the present invention includes a housing; It is configured in the lower portion of the housing, the lower filter material having a magnetic; An upper filter material formed on the lower filter medium and having a larger particle diameter than the lower filter medium; And a magnet configured to be closer to the lower filter layer than the upper filter layer.

In the above, the term "dispersion between filter media" defines a phenomenon that clogging occurs during filtration as the filter media of the fine particles are located at the upper part due to mixing and disturbance of the layers between the upper and lower media during the backwashing process.

More preferably, the filter medium forming the lower filter layer has a greater specific gravity than the filter medium forming the upper filter layer.

Therefore, the present invention is composed of a material having a larger magnetic particle size and a smaller specific gravity than the upper filter medium, particularly a lower particle size and a larger specific gravity than the upper filter medium. It is to prevent the dispersion between media by placing the media in the lower portion of the media.

It is reasonable for the upper part of the housing to be connected with a filtration line for introducing influent water, and for the lower part of the housing to be connected with a backwashing line for introducing backwash water (including backwashing air).

As an example, it is reasonable that the lower filter medium is made of steel slag balls and the upper filter medium is made of sand to generate a specific gravity difference.

As one example, it is preferable to increase the filtration efficiency by further including a top filter material composed of anthracite having a larger particle size and a smaller specific gravity than the sand constituting the top filter material.

As one example, the upper magnet can be configured to have a second magnet on the upper part of the bar, and the function of the dust collecting means for removing the fine powder having magnetism that can be included in the backwash water when backwashing by the configuration of the second magnet Do it.

To this end, it is reasonable for the second magnet to generate magnetic force only when the backwashing line is operated. In addition, it is reasonable for the magnet to generate magnetic force after the magnetic force is generated in the second magnet. That is, the magnet does not have a magnetic force when the filtration line is operated, the second magnet is operated when the backwashing line is operated, and the magnet is preferably by a backwashing line after the second magnet is operated. The magnetic force is applied before or after the backwashing is finished, so that the filter medium dispersed by the backwashing ends at the time when it is settled in place.

In order to control the timing at which magnetic force is applied to the magnet and the second magnet in this way, the present invention provides an example in which the magnet and the second magnet are composed of an electromagnet connected by a power source.

In addition to this, the second magnet may be composed of a mesh-shaped electromagnet, which is configured in a mesh shape to remove fine powders including magnetism, as well as flocs having magnetism deposited in the gaps between media by filtration. It is to be easily deposited so that these foreign substances can be removed.

As described above, the filtering device for preventing dispersion between filter media according to the present invention has an effect of preventing the filtration efficiency from being lowered due to disturbance of the media layer during filtration and backwashing by specific gravity and magnetic force.

The filtering device for preventing dispersion between filter media according to the present invention has an advantageous effect in terms of facility economy because it is possible to remove filter media powder and foreign substances deposited in the filter media by magnetic force when backwashing.

1a and 1b is a schematic diagram showing an embodiment of the present invention,
2 is a schematic diagram showing another embodiment of the present invention,
3 is a plan view showing an embodiment of a second magnet which is one configuration of the present invention,
4A and 4B are schematic views showing an operating state of the present invention shown in FIG. 2.

Hereinafter, embodiments of the present invention will be described in more detail through the accompanying drawings.

1A and 1B are schematic diagrams showing an embodiment of the present invention, FIG. 2 is a schematic view showing another embodiment of the present invention, and FIG. 3 is a plan view showing an embodiment of a second magnet which is one component of the present invention, 4A and 4B are schematic views showing an operating state of the present invention shown in FIG. 2.

As shown in FIG. 1, the filtration device 100 of the present invention includes a housing 110 for constructing a filtration column including upper and lower filtering layers 120 and 130 to be described below, and the housing 110 It is composed of the lower, and the lower filter layer 120 formed of a magnetic filter material 121, and the lower filter layer 120 is formed on the upper, than the filter media 121 forming the lower filter layer 120 It is characterized by being composed of a magnet 140 that is formed closer to the lower media layer 120 than the upper media layer 130 and the upper media layer 130 formed of a filter medium having a large particle size and a small specific gravity.

The housing 110 is formed such that the upper and lower filter media layers 120 and 130 are filled and formed in the space portion by forming a space portion therein.

The inside of the housing 110 has a lower media layer 120 and an upper media layer 130 on the upper portion of the lower media layer 130, the media constituting the lower media layer 120 ( 121) is configured in the lower portion of the housing 110, it is characterized in that it is formed of a magnetic media (121, hereinafter referred to as "lower filter media").

In addition, the upper filter layer 130 is characterized in that it is formed of a filter medium (131, hereinafter referred to as "top filter medium") having a smaller particle size and a specific gravity than the filter material 121 forming the lower filter layer 120.

First, the lower filter material 121 is characterized by having magnetic properties, and the lower filter material 121 contains magnetic materials such as iron to allow magnetic reaction with the magnet 140. That is, the lower media 121 is to be arranged in the periphery of the magnet 140 in the housing 110 in response to the magnet 140.

In the present invention, an example in which the lower filter material 121 is a steel slag ball is provided. The steel slag ball is referred to as a PS ball (Precious Slag ball) in the industry, and rapidly cools molten steel slag. At the same time, it is produced using a technology called SAT (Slag Atomizing Technology) that converts into a stable molecular structure. The steel slag ball is processed by a slag spraying method of rapidly cooling by atomizing water for a certain period of time at a suitable wind pressure in the molten steel slag generated during the steelmaking process of a steelworks, so that high-purity metal atoms other than iron have a circular stable structure. It is to have.

The steel slag ball is to make the Fe ₂ O ₃ component become a main compounding composition so that the magnet 140 reacts magnetically with the Fe component.

In this way, the steel slag ball as the lower filter material 121 has a larger specific gravity and a smaller particle diameter than the upper filter material 131, and the lower filter material 121 has a greater specific gravity than the upper filter material 131. When filtering and backwashing, it should be formed in the original position, that is, in the lower part. In addition, the lower filter material 121 is characterized in that the particle size is smaller than the upper filter material 131. Due to such a configuration, the foreign matter in the lower and waste waters introduced by the filtration line 150 to be described below is primarily filtered by the upper filter medium 131 having a larger particle size, and the upper filter medium 131 It is to enable efficient filtration without blocking the media layers 120 and 130 by the lower media 120 having a smaller particle size.

On the other hand, in the steel slag ball, the steel slag component has an advantage of high efficiency in removing chlorine-based aliphatic carbohydrates, so it is possible to treat industrial wastewater having a high concentration.

This steel slag component has two mechanisms to reduce chlorine-based aliphatic carbohydrates (CAHs), one of which is an electron donor as iron is oxidized in the steel slag, and CAHs become electron acceptors, resulting in dechlorination. , This reaction is as follows.

Fe0 → Fe2+ + 2e-

RCl +2e- + H+ → RH + Cl-

Fe0 + RCl + H+ → Fe2+ + RH + Cl-

The other is a biological treatment using hydrogen as an electron donor and CAHs as an electron acceptor as hydrogen ions in water become hydrogen gas by the first reaction in the above reaction formula, and the reaction formula of the reaction is as follows.

Fe0 + 2H2O → Fe2+ + H2 + 2OH-

On the other hand, the upper filter material 131 is characterized in that the particle size is larger and the specific gravity is smaller than that of the lower filter material 121. In the present invention, the upper filter material 131 is illustrated while illustrating the lower filter material 121 as a steel slag ball. Exemplifies sand.

Particularly, in the present invention, since the magnet 140 is configured, the position where the magnet 140 is configured is preferably configured to be closer to the lower media layer 120 than the upper media layer 130.

For example, FIG. 1A shows an example in which the magnet 140 is configured as an interior of the housing 110 under the lower media layer 120. In this case, the magnet 140 is not shown in the drawing, but may be composed of a ring shape that is in close contact with the inner periphery of the housing 110, a plurality of bar shapes attached to the lower surface of the housing 110, etc. If the structure in which the line 150 and the backwashing line 160 and the housing 110 can communicate is not limited in shape. In addition, FIG. 1A illustrates an example in which the magnet 140 is configured inside the housing 110 and is configured under the lower media layer 120, but the magnet 140 has a structure in which the upper and lower parts communicate with each other. Furnace may be configured inside the lower filter layer 120. That is, the magnet 140 is configured inside the housing 110, but is located below the upper filter layer 130 so that the lower filter 121 is applied to the upper filter layer by the magnetic force of the magnet 140. If it is to flow downward than 130, there is no need to limit its shape and position.

As another example, FIG. 1B illustrates an example in which the magnet 140 is configured outside the housing 110. The magnet 140 is configured in a ring shape and attached to the outer periphery of the housing 110. The position is attached so as to face the position where the lower filter layer 120 is constructed. In this configuration, since the filtration action of the lower filter layer 120 will not be interfered with by the magnet 140, it may be more advantageous than the example shown in FIG. 1A. FIG. 1B shows an example in which the magnet 140 is formed in a ring shape, but is not limited thereto, and the magnet 140 is configured outside the housing 110, than the upper media layer 130. If it is located in the lower portion so that the lower media 121 flows downward from the upper media layer 130 by the magnetic force of the magnet 140, there is no need to limit its shape and position.

On the other hand, the magnet 140 may be a permanent magnet, but as shown in FIG. 2, it is reasonable to configure the electromagnet by electrical connection 192 to the power supply 190. This prevents the magnet 140 from having a magnetic force at the time of filtration (when the filtration line 150 is operated), and is distributed by backwashing by having a magnetic force before the end of the backwashing action or at the end of the backwashing action. When the filter media is in place, it is reasonable to stop the operation so that magnetic force is generated only when necessary.

In addition, in the present invention, the filtration line 150 to discharge the treated water from the lower portion of the inlet flow from the upper portion of the housing 110 is configured to be opened and closed by the valve 151, the lower portion of the housing 110 The backwashing line 160, through which the backwashing water flows in and discharges the treated water to the top, is configured to be opened and closed by the valve 161.

On the other hand, in the present invention, as shown in FIG. 2, the top filter layer 170 may be further configured on the upper portion of the top filter layer 130, and the filter media 171 or less constituting the top filter layer 170 While the specific gravity is smaller than the upper filter media 131, the particle size is larger than the upper filter media 131 so that the filter layer is formed in three stages to increase the filtration efficiency while backwashing due to the specific gravity difference. It is to prevent dispersion between media.

In the present invention, when the upper filter media 131 is composed of sand, the uppermost filter media 171 presents an example of forming an anthracite.

Meanwhile, in the present invention, as shown in FIG. 2, an example in which the second magnet 180 is configured at the upper portion of the upper filter 130 (the upper portion of the upper filter 170) is illustrated. The reason why the second magnet 180 is constructed in this way is to function as a dust collecting means for removing fine powders having magnetic properties that may be included in the backwash water during backwashing. In other words, by collecting the magnetic powder generated from the steel slag ball by the second magnet 180, the filter line 150 and the backwashing line 160 are blocked by the magnetic powder to prevent equipment failure. Is to do it.

Accordingly, as shown in FIG. 2, it is reasonable for the second magnet 180 to generate magnetic force only when the backwashing line 160 is operated. For this purpose, the second magnet 180 is composed of an electromagnet to supply power. It is reasonable to make the magnetic force generated when necessary by making the electrical connection 191 with the 190.

In addition, it is reasonable that the second magnet 180 is configured in a mesh shape as shown in FIG. 3, which can generate a magnetic force by electrical connection only when backwashing, and also includes a magnet in a mesh shape. The purpose of the present invention is to remove fine particles to be removed, as well as to have flocs having magnetic properties deposited in the gaps between media by filtration, which are easily deposited on the second magnet 180 having a mesh shape to remove these foreign substances. In addition, since the second magnet 180 is configured in a mesh shape, the uppermost filter material 171 floats with the backwash water when backwashing due to its small specific gravity, thereby blocking the backwashing line 160 to obstruct the backwashing action. This is to block the second magnet 180 so as not to.

Hereinafter, the operation relationship of the present invention will be described with reference to FIGS. 4A and 4B.

Figure 4a shows the present invention when the filtration operation, the valve 151 of the filtration line 150 is turned on, the inflow water flows into the interior of the housing 110, the particle size by the uppermost filter layer 170 having a large particle diameter This large foreign matter is filtered, and in turn, the foreign matter mixed in the inflow water by the upper filter layer 130 and the lower filter layer 120 is filtered by particle size. In this way, the foreign matter is filtered by particle size so that smooth filtration can proceed without clogging. At this time, the magnet 140 and the second magnet 180 control the generation of magnetic force by turning off the power supply 190.

On the other hand, Figure 4b shows that the present invention when the backwash operation, the valve 161 of the backwash line 160 is turned on and the backwash water flows into the interior of the housing 110 to deposit foreign matter deposited in the gap of each media layer It is to be discharged to the outside. When the backwashing operation is performed, the power supply 190 is turned on 1 to generate magnetic force in the second magnet 180, and the fine powder having magnetism from the lower filter material 121 is collected based on the second magnet 180. The top portion 171, which has a small specific gravity and a large particle diameter, floats upward to block the backwashing line 160 from being blocked. In this way, before the backwashing operation ends or when the backwashing operation ends, the power supply 190 is turned on to generate magnetic force in the magnet 140. This may be caused by the dispersion of filter media due to the action of backwashing water (including backwashing air) during backwashing operation, consisting of steel slag balls based on the specific gravity difference of the media in each media layer and the magnetic force of the magnet 140 The lower filter material 121 is subjected to downward force so that disturbances and the like between the lower filter material 121 and the upper filter material 131 are prevented from occurring, so that each filter material is settled in place. At this time, in the case of the top filter medium 171, the specific gravity is small and the particle size is large, so there is no problem of dispersion among the filter media. In the above description, the power source 190 is turned on 1 to generate magnetic force in the second magnet 180, and the power source 190 is turned on 2 to express magnetic force in the magnet 140. It is expressed that the magnetic force is generated in the second magnet 180 after the washing action, and then the magnetic force is generated in the magnet 140 after the magnetic force is generated in the second magnet 180. The magnet 140 is configured to generate magnetic force before or after the backwashing operation ends.

Through the above description, those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

100: filtration device 110: housing
120: lower filter layer 130: upper filter layer
140: magnet 150: filtration line
160: backwash line 170: top layer
180: Second magnet 190: Power

Claims (9)

A housing in which a filtration line for introducing inflow water from the top to the bottom is connected, and a backwash line for introducing backwash water from the bottom to the top;
A lower filter layer formed on a lower portion of the housing and formed of a magnetic filter material;
An upper filter layer formed of a filter medium having a larger particle size and a smaller specific gravity than the filter medium forming the lower filter layer;
A magnet configured closer to the lower filter layer than the upper filter layer;
Including,
A second magnet is formed on the top of the upper filter, and the magnet and the second magnet are electromagnets that are electrically connected to a power source, and the second magnet generates magnetic force only when the backwash line is operated, and the magnet is the After the magnetic force is generated in the second magnet, magnetic force is generated before the end of the backwashing action or from the end of the backwashing action, but no magnetic force is generated when the filtration line is operated.
The second magnet is formed in a mesh shape, and the eyes of the mesh are smaller than the filter media of the upper filter layer, so that the filter media of the upper filter layer is blocked by the second magnet when backwashing to prevent clogging of the backwash line. Filtration device characterized by.
delete delete According to claim 1,
The filtering medium, characterized in that the filter medium of the lower filter layer is a steel slag ball, the filter medium of the upper filter layer is sand.
The method of claim 4,
A filtering device characterized in that the upper filter layer further comprises a top filter layer composed of anthracite having a larger particle size and a smaller specific gravity than sand constituting the upper filter layer.
delete delete delete delete

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