JPS622842B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a solid-liquid contact device used for adsorption treatment and filtration of liquids.

[Conventional technology]

In general, adsorption of adsorbed components in liquids using activated carbon, zeolite, ion exchange resins, etc., or filtration of liquids using materials such as anthracite or silica sand, is carried out by filling a fixed bed of these granular adsorbents in a tank and fixing them. Liquid flows down from above the floor. Then, check the amount of adsorbed components in the liquid flowing out of the tank,
When the fixed bed is breached, the operation is stopped and the fixed bed is regenerated. By the way, in such adsorption using a fixed bed, the fluidized liquid cannot become a plug flow, and since the fluid bypasses the fixed bed, an equilibrium saturated adsorption zone is formed at the end of the fixed bed. Even if it does not reach this point, the adsorbed components will leak out and the fixed bed will break through. Therefore, the entire fixed bed cannot be used effectively.

[Problem that the invention seeks to solve]

Conventional fixed-bed solid-liquid contact equipment that adsorbs liquids has various operational difficulties, such as the operation being interrupted to replace the fixed bed with regenerated adsorbent and the replacement work requiring a lot of labor. There was a problem that there was. Furthermore, solid-liquid contact devices using a moving bed have been proposed, but there is a problem in that none of these devices can be implemented industrially.

[Means for solving problems]

In the solid-liquid contact device according to the present invention, a tank with a cross-sectional area S is partitioned into an upper space and a lower space, the upper space is used as a replenishment tank, the replenishment tank is filled with recycled material, and the lower space is used for processing. Fill with filling material. The replenishment tank is provided with a pipe for supplying recycled filling material, and a hole is provided at the bottom of the tank, and a pipe with a cross-sectional area s is vertically arranged in communication with the hole. It is located below the space and communicates with the upper part of the container which is open downward. Moreover, the cross-sectional area ratio of the tank and the pipe is set to s/S≧1/5. Furthermore, strainers are provided above the lower space and inside the container, each communicating with a pipe.

Further, a solid-liquid contact device according to another invention of this invention includes:
In addition to the above, a spargeer is installed to blow stirring gas into the replenishment tank, and a vertical pipe is connected to the center of the lower part of the replenishment tank through a hole in the center of the lower space inside the tank. It is arranged vertically.

[Effect]

In this invention, the replenishment tank is integrally provided in the upper part of the tank, and the pipe communicating from the replenishment tank to the container located below the lower space in the tank is
Since it is arranged vertically and the ratio of the cross-sectional area S of the tank to the cross-sectional area s of its pipe is s/S≧1/5, the adsorbent layer in the lower space can be The capacity can be increased, pressure loss can be reduced, and processing capacity can be increased. Also, in the operation of exchanging the adsorbent layer, even if the flow is started and the adsorbent layer is moved upward, the regenerated filler can be replenished from the replenishment tank through the pipe.

Further, in another aspect of the present invention, since the replenishment tank is provided with a spargeer, even if fine powder adheres to the filler, it can be easily cleaned by suctioning gas. Moreover, since the vertically arranged pipe is located at the center of the tank, treatment operations such as adsorption and replacement of the adsorbent layer are facilitated.

〔Example〕

FIG. 1 is a cross-sectional view showing a reference example of this invention, which was filed by the same applicant as the present application on March 11, 1972, and published on September 30, 1971.
This device includes a strainer and a cylindrical conical cap as described in the specification of No. 11284.

In the figure, 1 is a tank, and 2 is an adsorbent layer filled inside the tank, in which granular adsorbents such as activated carbon, zeolite, and ion exchange resin are used. A strainer 3 is a ring-shaped pipe located at the top of the tank 1 and has a plurality of holes through which the adsorbent passes.The strainer 3 is fixed to the top of the tank 1 through a communicating introduction pipe 31, and the amount of liquid introduced is controlled by a valve 32. Adjust. Reference numeral 4 denotes a strainer composed of a ring-shaped pipe provided with a large number of holes through which only the liquid located at the bottom of the tank 1 passes, and is in communication with a lead-out pipe 41 erected at the bottom of the tank 1 . 42 is a valve provided on a branch pipe of this outlet pipe 41, and 43 is a valve provided in a portion directly connected to the outlet pipe 41. Reference numeral 5 denotes a conical cap body with a cylinder, which is made of a plate material formed into a conical shape and has a short cylindrical part around the open part, and when placed over the strainer 4 with its apex facing upward, the contact part with the strainer 4, etc. Fixed. Reference numeral 6 denotes an adsorbent supply pipe erected approximately at the center of the inner bottom of the tank 1, which extends upward through the hollow part of the strainer 4, and has an open end located within the conical cap body 5 of the cylindrical conical cap body 5. 6
1 is a valve provided on a branch pipe of the adsorbent supply pipe 6, and 62 is a valve provided on a direct portion thereof. Reference numeral 7 designates a pipe for discharging the adsorbent, which is provided hanging down from the upper part of the tank 1, and 71 is a valve provided in the pipe 7.

The adsorption device in this reference example is constructed as described above, and adsorption and replacement of the adsorbent layer 2 are performed by the operations described below. Its operation can be divided into two parts, one of which is an operation to adsorb the adsorbed component in the liquid to be treated, and the other operation is to discharge the adsorbent layer 2 that has reached adsorption saturation and create a new adsorbent. This is an operation that supplies

First, the operation of being attracted will be explained.

The liquid to be treated is supplied from the introduction strainer 3 to the upper part of the adsorbent layer tank 2 through the pipe 31 in the direction of arrow a by opening the valve 32. In the process of fluidizing the adsorbent layer 2, the adsorbed components of this liquid to be treated are adsorbed to the adsorbent layer 2, and the liquid to be treated moves inward from the outer periphery of the cylindrical conical cap body 5 as shown by arrow A. The liquid is collected by the strainer 4 and discharged as a processing liquid in the direction of arrow b through the pipe 41 and the opened valve 42. Note that the valves 43, 61, and 62 are closed during this suction operation.

Next, the operation of exchanging the adsorbent layer 2 will be explained. The adsorbent layer 2 is replaced from the bottom of the tank 1.
Either fresh adsorbent and pushing liquid (which may be part of the processing liquid) are supplied through pipe 6, or only new adsorbent is supplied from pipe 6, and pushing liquid (which may be part of processing liquid) is supplied. The adsorbent layer 2 supplied from the strainer 4 through the pipe 41 in the direction of arrow c and moved upward to the pipe 7
discharge through. Which of the strainer 4 or the pipe 6 to supply the liquid to be pushed up can be determined depending on the operating conditions. If the strainer 4 becomes clogged, the liquid should flow in the opposite direction to that of the liquid to be treated. When the strainer 4 is used to supply the water and the pressure drop of the strainer 4 has a large effect,
Alternatively, if the pressure resistance of the strainer 4 is low, the pumping liquid is supplied from the pipe 6. Of these, the adsorbent is supplied from the pipe 6, and the pushing up liquid is supplied through the strainer 4.
Replacement of the adsorbent layer 2 using a method of supplying more than
Close valves 32, 42, 61, 62, and close valve 4.
3 and 71 are opened, and only the pushing liquid is sent from the strainer 4 into the cylindrical conical cap body 5 through the pipe 41 in the direction of arrow c. Therefore, the adsorbent stored in the conical cap 5 spreads out from the inside of the conical cap 5 as shown by arrow B and flows out, so the adsorbent layer 2 moves upward and moves to the pipe 7. discharge from. When only the pumping liquid is supplied in this way, the adsorbent flows out, and a space is created in the upper part of the conical portion of the cylindrical conical cap 5 for only the pumping liquid, so that space has an appropriate volume. At that point, the valve 43 is closed to stop the supply of the pumping liquid, and then the valve 61 is opened and the space is filled with new adsorbent through the pipe 6. Then, the valves 61 and 62 are opened to supply a new mixed slurry of adsorbent and processing liquid from the pipe 6 into the cylindrical conical cap 5. Therefore, the adsorbent and processing liquid in the cylindrical conical cap 5 flow from the inside to the outside as shown by arrow B, causing the adsorbent layer 2 to rise and be discharged from the pipe 7. The fact that the saturated adsorbent tank 2 is column-shaped and can be moved upward and replaced with a new discharged adsorbent layer 2 is due to the structural characteristics of the apparatus of this reference example. Next, the relationship between the structural characteristics of the device and the conditions for moving the adsorbent layer 2 upward in a columnar manner will be described. In a device with a normal structure that does not have a structure like this reference example. First, in order to start moving the adsorbent layer 2 upward in a columnar manner, it is necessary to flow a liquid stream upward from below the adsorbent layer 2 at a predetermined flow rate. In the sense of imparting energy, it is sufficient to supply a liquid flow from below at a flow rate higher than the flow start speed of the adsorbent layer 2. However, if a liquid flow higher than the flow starting speed is supplied from below,
At first, the adsorbent layer 2 moves upward in a columnar manner, but due to this movement, a space containing only liquid is created below the adsorbent layer 2, and the adsorbent layer 2, which has moved upward in a columnar manner, collapses into this space containing only liquid. The adsorbent falls into a suspended state, that is, a fluidized state called a fluidized bed. This fluid state propagates upward in a short period of time, and the entire area becomes a fluid state. To avoid this situation, the adsorbent layer 2 first moves upward in a columnar manner and then replenishes the adsorbent into the space created below the adsorbent layer 2. This will fill the space with the adsorbent, as described above. This means that no fluidization will occur. Moreover, the speed (volume/time) of replenishing the adsorbent into the space must be the same as or faster than the upward movement speed (volume/time) of the adsorbent layer 2 in the columnar shape, otherwise it will flow due to the creation of the space. occurs. Furthermore, when the same volume of liquid is supplied from below the adsorbent layer 2, the higher the liquid flow is, the more the adsorbent in the adsorbent layer 2 can be moved. In order to satisfy such operating conditions, the apparatus of this reference example has a conical cap 5 with a cylinder installed below the adsorbent layer 2 in the tank 1, and the pumping liquid and adsorbent are pumped into the conical cap 5 with a cylinder. It is supplied to the inside and flows outward. In Fig. 1, the cross-sectional area of the channel through which the liquid and adsorbent flow in the direction of the arrow B is the cross-sectional area of the tank 1 minus the cross-sectional area of the cylindrical portion of the conical cap body 5. When the pushing up liquid is supplied from the strainer 4 or the pipe 6 to the cylindrical conical cap body 5, when it flows in the direction shown by the arrow B, the cross-sectional area of the flow path is small, so the pushing up liquid flows at high speed. If the flow exceeds that amount, the cross-sectional area of the tank is large for the same flow rate, so the flow rate becomes smaller.
Furthermore, while satisfying the above flow rate conditions, the adsorbent or the mixed slurry of the adsorbent and treatment liquid must be smoothly supplied to the lower part of the adsorbent layer 2.

FIG. 2 is a sectional view of an embodiment of the invention.
In the figure, 1 is a tank, 2 is an adsorbent layer filled therein, and the adsorbent is almost the same as in the reference example shown in FIG. 3 is a strainer having holes through which the adsorbent can pass through a ring-shaped pipe; 31 is an introduction pipe connected to the strainer 3;
2 is a valve provided in the direct part of the introduction pipe 31;
33 is a valve provided on a branch pipe of the introduction pipe 31. 4 is a strainer having a ring-shaped pipe with many holes; 41 is an upright pipe communicating with the strainer 4; 41a and 41b are pipes 41
are pipes branched into a T-shape, 42 is a valve provided on the pipe 41a, and 43 is a pipe 41b.
This is a valve installed in the Reference numeral 5a is a conical cap formed by forming a plate material into a conical shape, and the apex portion is opened to communicate with a pipe 10 disposed vertically. This conical cap has a similar function to the reference example shown in Figure 1, but it does not have a cylindrical part.
This is because the device of this embodiment does not require a function of storing adsorbent in the conical cap body 5a. Reference numeral 8 designates a new adsorbent replenishment tank that is installed at the top of the tank 1 and integrated with the tank 1. A hole is provided at the bottom of the tank 8 and a vertically arranged pipe 10 is connected to the tank 1. The supply tank 8 and the conical cap body 5a communicate with each other. Further, a pipe 11 is connected to the upper side of the supply tank 8, and the pipe 11 is connected to a pipe 41b, and a branch pipe 11a is provided in the middle thereof. 44 and 111 are valves provided on the pipe 11 and its branch pipe 11a. 6 is a pipe for supplying new adsorbent to the replenishment tank 8, 61 is a valve provided in the pipe 6, 9 is a spargeer provided in the replenishment tank, 91
92 is a valve used to supply gas to the spargeer 9, and 92 is a valve used to supply liquid to the spargeer 9.

The adsorption apparatus of this embodiment is constructed as described above, and in order to adsorb the adsorbed components of the liquid to be treated, the valve 32 is opened and the liquid to be treated is passed through the strainer 3 from the direction of arrow a and directed above the adsorbent layer 2. supply. Then, the liquid to be treated flows down the adsorbent layer 2, goes around the conical cap body 5a from the outside to the inside, and is collected in the strainer 4, and the valve 42 is kept open.
The processing liquid flows through the pipes 41 and 41a as indicated by the arrow b.
It is spilled in the direction. If this adsorption operation continues, the adsorbent layer 2 will reach adsorption saturation, so at that point the valves 32 and 42 are closed to stop the adsorption operation, and the adsorbent layer 2 is replaced with new adsorbent (regenerated adsorbent). ).

To replace new adsorbent into adsorbent layer 2,
First, close the valves 32, 42, 61, 91, 92, and 111, open the valves 33, 43, and 44, and pump the pumping liquid from the direction of arrow c to the pipes 41b, 4.
1 into the conical cap body 5a from the strainer 4. Then, the supplied push-up liquid goes around the conical cap body 5a from the inside to the outside as shown by arrow B, pushes up the adsorbent layer 2 from below, and pushes up the adsorbent layer 2.
rises and is discharged from the strainer 3 through the valve 33 in the direction of arrow B. Further, when the adsorbent layer 2 rises, the adsorbent in the conical cap 5a also flows out in the direction shown by the arrow B together with the pushing up liquid, but the decreasing adsorbent in the conical cap 5a flows from the supply tank 8. Since it is supplied sequentially through the pipe 10, the conical cap body 5
A space containing only liquid does not occur in the upper part of the interior of the adsorbent layer 2 or the lower part of the adsorbent layer 2. It should be noted that these operations can be carried out conveniently in sequence because the apparatus is constructed such that the pressure distribution throughout the apparatus allows these operations to be carried out. In other words, since the valve 44 is opened when the pumping liquid is supplied from the direction of arrow c through the strainer 4, the pressure of the pumping liquid is also propagated to the replenishment tank 8, and the adsorbent stored in the replenishment tank is It descends to the conical cap body 5a through the pipe 10 due to gravity, and the strainer 4
The pumping liquid supplied into the conical cap body 5a from above does not rise through the pipe 10. When the adsorbent layer 2 is replaced with a new adsorbent (regenerated adsorbent) as described above, the adsorbent in the replenishment tank 8 becomes smaller.
Close valves 3, 42, 43, and 44, and close valves 61 and 11.
1 is opened and new adsorbent is supplied from the pipe 6 to the supply tank 8. And if you supply too much,
It flows out through the pipe 11 and the valve 111 in the direction of arrow e.

In addition, when activated carbon or zeolite is used as a new adsorbent to be supplied into the supply tank 8, fine powder is often attached to it, but the fine powder is directly sent to the adsorbent layer 2 through the pipe 10. If it does, it will get mixed into the processing solution, which is extremely inconvenient. Therefore, the main function of the spargeer 9 is to wash and remove these fine powders in the supply tank 8. That is, the valve 91 is opened and gas (generally air) is passed through and stirred to enhance the cleaning effect of removing fine particles. Furthermore, the valve 92 is opened to send a liquid, and the fine powder is sent along with this liquid from the pipe 11.
It is discharged via valve 111. Also, valve 91
and 92 can be opened at the same time and gas and liquid can be introduced at the same time. Further, if the valve 42 is slightly throttled to reduce the amount of processing liquid discharged, that amount of liquid will rise up the straight pipe 10 and can be used for cleaning the adsorbent in the tank 8. Furthermore, it goes without saying that the stirring action by blowing gas or feeding liquid from the spargeer 9 not only has a cleaning effect but also has the effect of removing local retention of adsorbent in the tank 8.

Note that the diameter of the pipe 10 is of great significance in ensuring that the above operations are performed smoothly. In other words, if the diameter is small, the pressure drop will be large, and the amount of new adsorbent in the replenishment tank 8 will fall down into the pipe 10 will be small.On the other hand, if the diameter is large, the volume occupied in the tank 1 will increase, so the adsorbent layer 2 will become larger. The volume of the device becomes smaller, and the throughput of the device decreases. However, now that these relationships have become clear, a specific example will be described.

For example, when replacing the adsorbent layer 2, if the flow start speed of the adsorbent layer 2 is set to 20 m/H and the flow rate of the pushing liquid in the adsorbent layer 2 is set to 24 m/H, then the adsorbent layer 2
moves upward at approximately 4 m/h. Further, if the cross-sectional area of the adsorbent layer 2 is Sm ² , the amount of adsorbent that moves per hour is 4Sm ³ /H. By the way, the moving speed when the adsorbent moves down the pipe 10 by gravity must be equal to the flow start speed, and in this case is 20 m/H. Therefore, if the cross-sectional area of the pipe 10 is Sm ² , the amount of movement (falling amount) of the adsorbent per hour is 20Sm ³ /H.
Furthermore, since the amount of replenishment from the pipe 10 must not be less than the amount of movement, it is sufficient to satisfy the following conditions: 20s≧4S s/S≧4/20=1/5. In this case, pipe 1
The diameter of 0 should be just about 1/5 of the cross-sectional area of the adsorbent layer 2, but since the movement speed will decrease due to friction, it should be 1/5.
It is better to make it a top 5.

Note that when the adsorbent in the replenishment tank 8 descends and decreases through the pipe 10 in this manner, liquid corresponding to the volume thereof gradually flows into the replenishment tank 8 from the pipe 11 in order to maintain the pressure balance.
If this pipe 11 were not present, as the amount of adsorbent in the tank 8 decreased, a portion of the liquid pushed up from the strainer 4 would rise and enter through the pipe 10. This is undesirable as it impedes descent. Conversely, if the liquid is actively fed into the replenishment tank 8 from the pipe 11, the liquid will descend through the pipe 10, and the descending speed of the adsorbent will increase, making the diameter of the pipe 10 even smaller. It's okay. Furthermore, specifically, in order to send the liquid from the pipe 11 to the replenishment tank 8, it is sufficient to provide a valve on the pipe 41 and leave it half-open, and to make the internal pressure of the pipe 11 higher than the internal pressure of the strainer 4.

FIG. 3 is a sectional view showing another reference example of the present invention, which can perform the same functions and operations as the device shown in FIG. 2, but is structurally different from the second example.
What is different from the one shown in the diagram is the supply tank 8.
The replenishment tank 8 and the conical cap body 5a are communicated with each other through a U-shaped communication pipe 10a, and new adsorbent is transferred from the replenishment tank 8 to the conical cap body 5a through the communication pipe 10a. Since the water is supplied from below, no hole is provided at the apex of the conical portion of the conical cap body 5a. Also, when replacing the adsorbent tank 2 with a new adsorbent, the pumped up liquid is transferred to the strainer 4.
A valve 45 is provided in the pipe 41a in order to adjust the amount and pressure supplied to the inside of the conical cap body 5a and the supply tank 8.

In this reference example, adsorption of the adsorbed substance from the liquid to be treated is carried out in the same manner as in the embodiment shown in FIG. When the adsorbent layer 2 reaches adsorption saturation, the adsorbent layer 2 is replaced with a new adsorbent. In that case, first the valves 32, 42, 61, 91, 92
and 111 are closed, and the valve 45 is left half open. In this state, when the uplifting liquid is fed from the valve 43 as shown in the direction of arrow c, most of this uplifting liquid passes through 45, is fed through the strainer 4, and then turns out from the opening at the bottom of the conical cap body 5. However, due to this liquid flow, the adsorbent layer 2 moves upward, and the old adsorbent on the upper part is discharged from the strainer 3 together with the liquid through the valve 33. At this time, since the adsorbent in the conical cap body 5 decreases, new adsorbent is replenished. To replenish it, a part of the pushing up liquid is supplied to the supply tank 8, and the adsorbent is transferred from the supply tank to the communication pipe 10 with the liquid flow of this pushing up liquid.
It is supplied into the conical cap body 5a through a.

Note that it has been experimentally found that the amount of adsorbent that moves from the supply tank 8 into the conical cap 5a is approximately 1/2 (in terms of volume) of the amount of the pumped up fluid.
Based on this value, it is possible to determine the ratio of the amount of pumping liquid distributed and supplied from the supply tank 8 strainer 4 to the conical cap body 5a by the valve 45.

For example, when the flow start speed of the adsorbent layer 2 is 21 m/H and the superficial velocity of the pumping liquid is 24 m/H,
The rising speed of the adsorbent layer 2 is 4 m/h, and if the cross-sectional area of the adsorbent layer 2 is S ₁ m ² , the amount of movement of the adsorbent is 4 S ₁
m ³ /H. Therefore, the flow rate of the pumping liquid to the supply tank 8 is twice that amount, which is 8Sm ² /H (4S÷1/3). Further, since the total flow rate of the pushing up liquid is 24 Sm ³ /H, 1/3 (S/24=1/3) of the pushing up liquid from the valve 43 may be diverted to the supply tank 8.

In addition, the valve 44 in FIGS. 2 and 3
It is also possible to replace it with a check valve that allows flow only in an upward direction. In addition, the valves 32, 43, and 61 may be replaced with check valves when feeding and supplying the liquid to be treated, the pushing liquid, and the adsorbent, using a feeding and supplying means that can be turned on and off, such as a pump. is possible. In other words, if a check valve is used instead of a valve in this way, it becomes unnecessary to operate these valves only by turning the pump on and off. Therefore, in this case, only the valves 33 and 42 are required to be operated when feeding the uplifting liquid. Also,
The valve 61 may be a liquid level opening/closing valve that is closed just before the liquid level in the replenishment tank 8 rises and is about to flow upward from the valve 61. Moreover, instead of the conical cap body 5a in FIGS. 2 and 3, a cylinder with one end sealed may be used. In this case, a conical dead space in which the adsorbent does not move is created just above the cylinder, but it goes without saying that there is no practical problem other than the adsorbent in that area being wasted.

Incidentally, although the embodiment shown in FIG. 2 has been described as an adsorption device, it goes without saying that the same structure can also be used as a moving bed filtering device. That is, when a material such as anthracite is filled instead of an adsorbent and water to be treated is introduced from the strainer 3, suspended matter in the liquid to be treated is captured at the upper part of the material layer 2, causing clogging. At this stage, the material layer 2 may be moved upward, discharged from the upper part, and replenished to the lower part. In this case, since the replenishment tank 8 is provided with a cleaning function using a sparger 9 or the like, there is an advantage that the dirty material discharged from the upper part may be directly supplied into the replenishment tank 8.

〔Effect of the invention〕

As described above, the present invention enables processing of the liquid to be processed, such as adsorption, in a single operation, reduces labor and equipment costs, and allows continuous operation of the entire process. Moreover, since the cross-sectional area of the tank and the cross-sectional area ratio of the pipe vertically arranged between the replenishment tank and the lower container are set within a certain range, processing operations and filling tank replacement operations are facilitated. Improve the industrial value of the device itself.

Another aspect of the present invention is that since a spargeer is provided, it is possible to use even a filler to which fine powder has adhered, thereby increasing the flexibility in use of the apparatus.

Furthermore, the vertical pipe from the replenishment tank is located in the center of the tank, making operation easier.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a reference example of this invention, Fig. 2 is a sectional view showing a reference example of this invention;
The figure is a sectional view showing one embodiment of this invention, and FIG. 3 is a sectional view showing another reference embodiment of this invention. In the figure, 1 is a tank, 2 is an adsorbent layer, 3 and 4 are strainers, 5 is a conical cap with a cylinder, 5a is a conical cap, 8 is a supply tank, and 10 is a pipe. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1 (a) A tank with a cross-sectional area S; (b) A replenishment tank that partitions the inside of the upper tank and is provided at the upper part of the tank; (c) A recycled filler stored in the replenishment tank and the above. (d) A pipe for supplying regenerated filling provided in the above-mentioned replenishment tank; (e) A pipe connected vertically to a hole provided in the lower part of the above-mentioned replenishment tank; ( f) A container installed at the lower end of the pipe mentioned in (e) above, communicating with the pipe at the top and having an enlarged opening at the bottom; (h) a strainer provided in the container for supplying a liquid for pushing up the filling material; A solid-liquid contact device consisting of a strainer provided in the upper part of the lower space; 2 (a) A tank with a cross-sectional area S; (b) A replenishment tank that partitions the inside of the upper tank and is provided at the top of the tank; (c) A spargeer that is provided in the replenishment tank and sends gas for stirring; (d) Recycled filler stored in the replenishment tank and filler filled in the lower space formed by the partition; (e) A pipe for supplying regenerated filler provided in the replenishment tank; (f ) A pipe with a cross-sectional area s that communicates with a hole provided at the center of the lower part of the replenishment tank and is disposed vertically in the center of the tank, and whose lower end is located below the lower space; and the ratio of the cross-sectional area of the pipe is s/S≧1/5; (g) An opening provided at the lower end of the pipe of (e) above, communicating with the pipe at the upper part and expanding at the lower part. (h) a strainer provided in the container for collecting the processing liquid by switching or supplying the liquid for pushing up the filling in the lower space; (i) for collecting the liquid for pushing up the filling in the lower space; A solid-liquid contact device comprising: a strainer provided above the lower space for discharging the liquid or supplying the liquid to be treated to the filling material in the lower space.