JP2937786B2 - How to remove mud - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fluidizing sludge deposited in a tank, particularly sludge having a high viscosity such as yeast cake and protein coagulation components, and discharging the sludge to the outside of the tank. The present invention relates to a method for removing an object.

[0002]

2. Description of the Related Art When brewing alcoholic beverages such as beer, fermentation is performed in a fermentation tank. After the beer after the fermentation step is sent to the next step, yeast, protein coagulation components, and the like settle on the bottom of the tank to produce a mud. In order to remove the mud in the tank, an operator enters the tank and scrapes the mud to a discharge port with a T-shaped scraping tool to discharge and remove the mud. Further, a scraping device for muddy materials as shown in Japanese Utility Model Publication No. 56-35213 has been proposed. The scraping device includes a traveling body, a liquid ejecting nozzle and a scraping plate installed on the traveling body, and a flexible liquid passage connected to the liquid ejecting nozzle. Then, the traveling body is advanced by injecting the pressure water from the liquid jet nozzle through the liquid passage pipe, and the traveling body is retracted by winding the liquid passage pipe.

[0003]

However, the above-described manual scraping operation of the worker has the following problems. Oxygen deficiency occurs due to carbon dioxide gas generated in the tank. It is a cold and dark work environment, and the work of scraping manually requires a heavy load on the worker. Human entry into the tank is likely to cause microbial contamination.

Further, in the above-mentioned apparatus for scraping a mud disclosed in Japanese Utility Model Publication No. 56-21313, there is a problem that labor and time are required for installing the scraping apparatus. Also,
When there is much mud, there is a problem that it is difficult to run the running body by the force of the injection water, and where there is little mud, it is difficult to run the running body stably, such as running away.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can discharge and remove sludge deposited in a tank without imposing a burden on a worker for a scraping operation and without using a special device. It is an object of the present invention to provide a method for removing mud.

[0006]

In order to achieve the above-mentioned object, the present invention provides a method for removing muddy matter, comprising an inlet at a lower portion of one of the side surfaces and a discharge port at a bottom located at a position close to the inlet. In a method for removing muddy matter settled in a horizontal cylindrical tank provided with a tank, a pressurized water is injected while oscillating a nozzle attached to an inlet of the tank up and down, and A first step of forming a groove extending in the longitudinal direction of the tank by removing mud accumulated on the bottom, and injecting pressurized water while swinging the nozzle up and down and right and left, A second step of starting the flow of the slurry, and injecting pressure water toward the slurry from the inlet side of the tank while oscillating the nozzle left and right, and the slurry moves in the groove direction. After starting the nozzle, move the nozzle A third step of moving toward and is characterized in that it consists of.

[0007]

According to the present invention having the above-described structure, in the first step, the pressurized water is jetted along the longitudinal direction of the bottom of the tank to remove the mud accumulated on the bottom of the tank. A groove extending in the longitudinal direction is formed, and then, in a second step, pressure water is sprayed evenly over the entire mud in the tank to make it fluidized, and further, in a third step, starting from the inlet side of the tank. After injecting the pressurized water in a direction perpendicular to the longitudinal direction and moving the mud in the groove direction,
The injection of the pressurized water is continued with the nozzle facing the back, and the mud can be sequentially discharged using the previously formed groove as a discharge path.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for removing a mud according to the present invention will be described below with reference to the drawings. In the present embodiment, yeasts for brewing beer which have been deposited and deposited in a horizontal cylindrical tank will be described as an example of mud.

FIG. 1 is a schematic view showing an apparatus for carrying out the method for removing muddy matter according to the present invention, and FIG. 2 is a view taken in the direction of arrow II in FIG. A horizontal cylindrical tank 1 for fermentation or storage of beer or the like has an inlet (manhole) 3 formed on one side surface.
And a liquid outlet 4 formed at the bottom near the inlet 3. The tank 1 is slightly inclined downward from the back side toward the entrance 3. Then, from the inlet 3, an injection nozzle 5 for discharging the settled mud 2 into the horizontal tank 1 generated in the fermentation process is inserted. The muddy matter accumulated in the tank 1 is fluidized by the pressurized water injected from the nozzle 5 and is discharged and removed from the tank 1. The pressurized water is sent from the water tank 6 by the supply pump 7 to the nozzle 5 via the pipe 8.
The mud 2 is discharged from the discharge port 4 through the pipe 10 by the recovery pump 9.

FIG. 3 is a schematic view showing another example of an apparatus for carrying out the method for removing muddy matter according to the present invention. In the apparatus shown in FIG. 3, a recovery circulation pump 11 for recovering and circulating the mud 2 from the outlet 4 and pipes 12 and 13 are additionally provided. The pipe 13 is connected to the pipe 8. In this apparatus, similarly to the apparatus shown in FIG. 1, the pressurized water can be supplied from the water tank 6 to the nozzle 5 and the water containing the mud discharged from the tank 1 can be supplied to the nozzle 5. That is, the water containing the mud discharged from the outlet 4 is circulated again as a pressure water source, so that the amount of water used can be saved.

Next, a method of removing mud using the apparatus constructed as shown in FIGS. 1 to 3 will be described with reference to FIGS. 4 to 7, FIGS.
(A), 6 (a) and 7 (a) are side views of the tank, and FIGS. 4 (b), 5 (b), 6 (b) and 7 (b) are plan views of the tank, respectively. Pressure water used in the present process, the injection pressure is preferably in the range of ^{5kgf / cm 2 ~15kgf / cm 2} .

A nozzle 5 is inserted into the horizontal tank 1 from the inlet 3 of the tank 1. Then, the pump 7 is operated to jet the pressure water from the nozzle 5. At this time, as shown in FIG. 4A, when the nozzle 5 is swung up and down by a driving device (not shown) so that the pressurized water hits the mud 2 deposited in the longitudinal direction at the bottom of the tank 1, the mud is formed. The object is scattered by the water pressure, and a groove 15 extending in the longitudinal direction of the tank is formed at the bottom of the tank as shown in FIG. Next, FIG.
As shown in FIG. 5A and FIG. 5B, when the nozzle 5 is simultaneously swung up and down by a driving device (not shown) while being swung up and down, the pressure water is uniformly applied to the muddy substance 2 in the tank 1. Finally, the flow of the slurry 2 starts.

Next, as shown in FIG. 6 (b), while the nozzle 5 continues to swing left and right, the angle of the nozzle 5 is adjusted so that the spray water hits the inlet 3 side as shown in FIG. 6 (a). When the spraying is performed, the mud 2 in a fluidized state reaches the drain 4 through the groove 15 as a discharge path, and is discharged out of the tank 1.
Then, as shown in FIGS. 7A and 7B, when this work is sequentially advanced from the inlet side of the tank 1 to the back side, the mud 2 in the tank 1 can be completely discharged. it can. Here, the discharged liquid containing the discharged mud is circulated by the pipes 12 and 13 and the pump 11 as shown in FIG.
If the supply of water from the water tank 6 is stopped by closing the valve 16, the water used for injection can be saved.

In the embodiment described above, the case of a horizontal tank for fermentation or storage of beer or the like has been described.
Needless to say, the present invention can be applied to other types of tanks having a small bottom slope.

[0015]

As described above, according to the present invention, it is possible to discharge and remove the mud accumulated in the tank to the outside of the tank without imposing a load on the worker and without using any special device. it can. In addition, the amount of water used can be saved by circulating the discharged water containing mud as a pressure water source again.

[Brief description of the drawings]

FIG. 1 is a view showing an example of an apparatus for performing a method for removing a muddy substance according to the present invention.

FIG. 2 is a view taken in the direction of the arrow II in FIG.

FIG. 3 is a view showing another example of an apparatus for performing the method for removing a muddy substance according to the present invention.

FIG. 4 is an explanatory view illustrating a method for removing a muddy substance according to the present invention.

FIG. 5 is an explanatory view illustrating a method of removing a muddy substance according to the present invention.

FIG. 6 is an explanatory view illustrating a method for removing muddy substances according to the present invention.

FIG. 7 is an explanatory view illustrating a method of removing a muddy substance according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal tank 2 Mud 3 Inlet (manhole) 4 Outlet 5 Nozzle 7 Supply pump 8,10,12,13 Pipe 9 Recovery pump 11 Recovery circulation pump 15 Groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-92118 (JP, A) JP-A-57-156009 (JP, A) JP-A-7-289807 (JP, A) 55006 (JP, A) JP-A-4-260403 (JP, A) JP-A-4-66104 (JP, A) JP-A-56-48988 (JP, A) JP-A-6-81603 (JP, U) 6-260403 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B01D 21/18 B08B 9/093

Claims (2)

(57) [Claims] 1. A method for removing mud which has settled in a horizontal cylindrical tank provided with an inlet at a lower portion on one of the side surfaces and having a discharge port at a bottom near the inlet. A method for forming a groove extending in the longitudinal direction of the tank by injecting pressure water while oscillating a nozzle attached to an inlet of the tank up and down to remove muddy substances deposited at the bottom of the tank and forming a groove extending in a longitudinal direction of the tank. A second step of injecting pressurized water while oscillating the nozzle up and down and left and right to start the flow of the mud in the tank;
Injecting pressurized water toward the mud from the entrance side of the tank while swinging the nozzle to the left and right, and moving the nozzle in the groove direction after the mud starts moving in the groove direction. A third step of moving toward the back side of the object, and a method of removing mud. 2. The mud according to claim 1, wherein the water containing the mud discharged from the discharge port is circulated again as a pressure water source in the first, second, and third steps. Removal method.