JPH022408Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is designed to raise the material at the bottom of the floor in the tank using an air lift pipe to clean it, and to return the cleaned material to the upper part of the floor. The present invention relates to an upflow type continuous filtration device which is particularly effective in cleaning materials and separating and discharging cleaning wastewater.

[Conventional technology]

In an upward flow continuous filtration system, the material at the bottom of the floor of the tank is lifted up by an air lift pipe to be cleaned, and the cleaned material is returned to the top of the floor.The cleaning efficiency of the material is a function of the equipment. There is a need for a simple and efficient structure for cleaning materials. Based on these requirements, we have created a system with a relatively simple structure that utilizes the benefits of cleaning through countercurrent flow between the material and the cleaning fluid.
The method shown in Japanese Patent Publication No. 56-51808 has been devised.

[Problem that the invention attempts to solve]

The device disclosed in Japanese Patent Publication No. 56-51808 is designed to perform countercurrent cleaning with the liquid flowing upward in the cleaning path while the dirty material discharged from the upper end of the air lift tube descends through the cleaning path and is refluxed. However, in order to lift up the contaminants peeled off from the material during cleaning, a large amount of cleaning liquid is required, and there is also a risk that the inside of the cleaning channel will become clogged.

This invention solves these conventional problems and
It is an object of the present invention to provide an upward flow type continuous filtration device that can efficiently wash materials with a smaller amount of water and has a simple structure with no fear of flow path blockage.

[Means for solving problems]

The present invention provides an upward flow type continuous filtration device in which the material at the bottom of the floor of the tank is lifted up by an air lift pipe to be cleaned, and the washed material is returned to the upper part of the floor. A discharge port is provided in communication with a separation chamber formed at the upper part of the tank, and the separation chamber is further provided with a separated liquid outlet and a liquid inlet for introducing the liquid into the separated liquid outlet in a substantially cross-flow manner. This is an upward flow type continuous filtration device characterized in that a material discharge section is opened and arranged at the lower part of the cross flow section to guide the material discharged from the discharge port of the air lift pipe.

〔Example〕

One embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes an air lift pipe, and a floor is formed in the lower part of the tank 2 by the upward force of the air fed to the lower part of the pipe. A static mixer 3 is installed in the upper part of the air lift tube 1 to disturb the liquid flow.
It is preferable to provide the air lift tube 1 so that the flow rising inside the air lift tube 1 is discharged from the upper discharge port 4.

Further, a separation chamber 5 is formed in the upper part of the tank 2 to surround the discharge port 4, but it is preferable to attach a baffle plate 6 near the discharge port 4 in the separation chamber 5 to collide with the discharged flow. The lower end of the full plate 6 is the separation chamber 5
It is separated from the inclined wall 7 below.

Further, a separated liquid outlet 8 is provided at the bottom of the separation chamber 5, and a drain pipe 9 is connected to the separated liquid outlet 8 to guide the liquid out of the tank. You can also do it. Furthermore, the separation chamber 5
A liquid inlet 10 is provided at the position where the liquid is guided to the separated liquid discharge port 8 in a substantially horizontal flow, and a discharge port 4 is provided in the horizontal flow portion of the liquid.
A material discharge part 11 is opened lower than these between the separated liquid discharge port 8 and the liquid introduction port 10 so as to guide the material discharged from the tank 2. An opening/closing door 1 that communicates with the opening and opens the opening by the pressure of the closing material deposited under its own weight, or is connected to an appropriate opening/closing means.
2 will be provided.

In this way, the liquid in the upper part of the tank 2 flows into the separation chamber 5 through the liquid inlet 10, and the material discharge part 1
After coming into contact with the material that is settling to 1 in a lateral flow, it flows to the separated liquid outlet 8, but it is necessary to prevent the material from flowing to the separated liquid outlet 8 due to the lateral flow of the liquid. For example, as shown in the illustrated example, a flow rate adjustment mechanism such as a flow rate adjustment plate 13 that can be raised and lowered is attached to the separated liquid outlet 8, and the amount of water discharged from the separated liquid outlet 8 is adjusted by operating it with an operating section 14 outside the tank 2. It is preferable to do so.

When the material at the bottom of the floor contaminated by the upward flow is raised together with the liquid in the tank through the air lift pipe 1, the flow is disturbed and is even more violently disturbed at the static mixer 3. Contaminants adhering to the material are removed and the material is effectively cleaned.

Next, the liquid containing the cleaned materials and the peeled contaminants is discharged from the discharge port 4 into the separation chamber 5 and collides with the baffle plate 6, and the materials and contaminants settle along the inclined wall 7. The material moves and reaches the material discharge section 11, but on the way, due to the horizontal flow of the liquid introduced from the liquid introduction port 10, the contaminants separated from the material are discharged from the separated liquid discharge port 8 to the outside of the tank via the drain pipe. Meanwhile, the washed material that has reached the material discharge section 11 is returned to the upper part of the floor in the tank 2 by opening the opening/closing door 12. At this time, the amount of water discharged from the separated liquid discharge port 8 is adjusted by the flow rate adjustment plate 13, etc., to ensure accurate separation of the wood and contaminants, and to discharge the crushed and reduced wood together with the contaminants. This allows washed material with uniform particle size to be constantly refluxed to the upper part of the bed.

[Effect of idea]

As described above, according to the present invention, the dirty material rising inside the air lift pipe can be effectively separated from the contaminated material and cleaned while being disturbed within the air lift pipe, and the material can be separated from the cleaned material. Because the separation from the contaminated contaminants is carried out by horizontal flow of liquid,
The amount of water used for cleaning can be significantly reduced compared to the conventional countercurrent method, and there is no risk of clogging the cleaning section, and even crushed and small pieces of wood can be discharged together with contaminants. This has beneficial effects such as being able to constantly reflux material with a uniform particle size.

[Brief explanation of the drawing]

The drawing is a cross-sectional view of essential parts showing an embodiment of the present invention. 1... Air lift pipe, 2... Tank, 3... Static mixer, 4... Discharge port, 5... Separation chamber, 6
... Bumpy plate, 7 ... Inclined wall, 8 ... Separated liquid discharge port, 9 ... Drain pipe, 10 ... Liquid inlet, 11
... Material discharge section, 12 ... Opening/closing door, 13 ... Flow rate adjustment plate, 14 ... Operation section.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An upward flow continuous filtration system in which the material at the bottom of the floor in the tank is lifted up by an air lift pipe to be cleaned, and the cleaned material is returned to the top of the floor. In the apparatus, the discharge port of the air lift pipe is provided in communication with a separation chamber formed in the upper part of the tank, and a liquid is introduced into the separation chamber by introducing a liquid into the separation chamber in a substantially horizontal flow to a separated liquid discharge port and the separated liquid discharge port. An upward flow type continuous filtration device, characterized in that an opening is provided and a material discharge section is opened at a lower part of the liquid lateral flow section so as to guide the material discharged from the discharge port of the air lift tube. (2) The upward flow continuous filtration device according to claim 1, wherein the separated liquid outlet is equipped with a flow rate adjustment mechanism.