JP4913643B2 - Tank cleaning system - Google Patents

Description

  The present invention relates to a tank cleaning technique for storing beer and the like in a beer manufacturing process, for example.

  For example, Patent Documents 1 and 2 describe drainage structures such as bathtubs and kitchens.

In addition, as shown in FIG. 2, a conventional tank cleaning system in a beer manufacturing process includes a sealed storage tank 1 such as a fermentation tank or a storage tank, and an upstream pipe opening / closing valve that can be switched between communication and shutoff with respect to the storage tank 1. 3, an upstream pipe 2 connected to the storage tank 1, a downstream pipe 4 having a downstream pipe opening / closing valve 5 that can be switched between communication and cutoff with the storage tank 1, and connected to the storage tank 1; The pump 6 disposed in the side pipe 4 for pumping the stored liquid in the pipe downstream, and the upstream side in the cleaning mode for cleaning the inside of the storage tank 1 with back pressure applied by gas in the storage tank 1 And a cleaning device 7 for supplying water and cleaning liquid into the storage tank 1 via the pipe 2.
JP 2001-009161 A JP 2000-210218 A

  In the tank cleaning by the tank cleaning system shown in FIG. 2, first, the inside of the tank 1 is empty, the beer content in the tank 1 is rinsed with water supplied from the cleaning device 7, and then the tank 1 is washed with a chemical solution such as caustic soda. The inside is washed, and the inside of the tank 1 is rinsed again with water. In such a cleaning process, since caustic soda, which is a chemical solution, is circulated by the pump 6 and reused, rinsing water is also injected into the tank 1 through the same piping as the caustic soda. The reason for circulating the chemicals and water in this way is that the tank 1 is closed and the back pressure is applied to the tank 1 with carbon dioxide gas, so that the rinsing water is discharged directly from the discharge port under the tank. This is because the carbon dioxide gas in the tank 1 is discharged together with the water. Therefore, conventionally, a certain amount of rinsing water is stored in the tank 1 so that the carbon dioxide gas is not discharged unnecessarily, so that the carbon dioxide gas and the rinsing water are separated, and only the rinsing water stored in the tank 1 is downstream by the pump 6. It was sent to the end of the side pipe 4 and discharged. The reason why the rinsing water is stored in the tank 1 is to prevent the pump 6 from idling due to the carbon dioxide mixed in the rinsing water and preventing the water from flowing in the pipe 4. Since it accumulates, draining takes time.

  The present invention has been made in view of the above problems, and its purpose is to eliminate pumping of rinsing water by a pump in the tank cleaning mode, and to eliminate the time for rinsing water to be stored in the tank, and to improve the drainage efficiency. Is to realize.

In order to solve the above-described problems and achieve the object, a tank cleaning system according to the present invention includes a sealed storage tank 1 and an upstream pipe opening / closing valve 3 that can be switched between communication and blocking with respect to the storage tank, An upstream pipe 2 connected to the storage tank, a downstream pipe opening / closing valve 11 that can be switched between communication and blocking with respect to the storage tank, a downstream pipe 4 connected to the storage tank, and the downstream pipe And the pump 6 for pumping the stored liquid in the pipe downstream, and in the cleaning mode in which the storage tank is emptied and cleaned, the upstream side of the storage tank is subjected to gas back pressure. A branch pipe that branches from the downstream pipe between the storage tank and the pump in the downstream pipe, the cleaning device 7 supplying water and cleaning liquid into the storage tank via the side pipe 2 is provided, the branch piping and the downstream pipe and a communicating or can cut off by the downstream pipe on-off valve, connects the gas-liquid separator 13 for separating the gas and liquid in the branch pipe, the unwashed mode The branch pipe is shut off so as not to communicate with the downstream pipe, and the downstream pipe on / off valve is switched so that the stored liquid in the storage tank flows to the pump side in the downstream pipe. A branch pipe and the downstream pipe communicate with each other, and the downstream pipe on-off valve is arranged so that water and cleaning liquid supplied into the storage tank flow from the downstream pipe to the branch pipe without accumulating in the storage tank. The water and cleaning liquid separated by the gas-liquid separation device are discharged.

  Preferably, the gas-liquid separator has a gas vent valve 15 for releasing the separated gas, and intermittently opens and closes the gas vent valve during the cleaning mode to release the separated gas.

  According to the present invention, the pumping of the rinsing water by the pump in the tank cleaning mode is abolished, and the time for storing the rinsing water in the tank becomes unnecessary, and the drainage efficiency can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The embodiment described below is an example as means for realizing the present invention, and the present invention can be applied to a modified or modified embodiment described below without departing from the spirit of the present invention.

  FIG. 1 is a diagram showing a configuration of a tank cleaning system according to an embodiment of the present invention.

  As shown in FIG. 1, the tank cleaning system of the present embodiment includes a storage tank 1, an upstream pipe 2, an upstream pipe opening / closing valve 3, a downstream pipe 4, a downstream pipe opening / closing valve 5, a pump 6, and a cleaning device 7. The structure is the same as that shown in FIG.

  The difference from FIG. 2 is that a three-way valve 11 and a branch pipe 12 branching from the downstream pipe 4 are provided between the storage tank 1 and the pump 6 in the downstream pipe 4, and gas and liquid are provided in the branch pipe 12. This is a point where a gas-liquid separation device 13 for separating is connected. The gas-liquid separator 13 has a discharge pipe 14 that discharges separated air and carbon dioxide gas into the atmosphere, and a gas release valve 15 that opens and closes the discharge pipe 14. The separated gas is released by intermittently opening and closing.

  Cleaning of the tank by the tank cleaning system of the present embodiment is performed by the three-way valve 11 in the tank 1 in a state where the tank 1 is emptied and carbon dioxide gas is sent from the cleaning device 7 and back pressure is applied to the tank 1. The side pipe 4 is connected to the branch pipe 12, water is sent from the cleaning device 7 to rinse the inside of the tank 1, and then the chemical solution such as caustic soda is sent from the cleaning device 7 to wash the inside of the tank 1, and again the tank 1 with water. The inside is rinsed.

  During this cleaning, the waste liquid in which the carbon dioxide gas, the rinsing water, and the chemical liquid are mixed is sent to the gas-liquid separator 13 to be separated into a gas and a liquid. And the liquid isolate | separated within the gas-liquid separator 13 is discharged | emitted, suppressing the wasteful discharge | emission of a carbon dioxide gas by operating the gas vent valve 15 intermittently.

  Accordingly, it is not necessary to store water in the tank 1 during the tank cleaning mode, so that the rinsing time can be remarkably shortened. Further, since the liquid is discharged from the gas-liquid separator 13 and carbon dioxide gas is intermittently released as necessary, wasteful discharge of the carbon dioxide gas is suppressed and accumulated in the gas-liquid separator 13 after completion of the cleaning mode. Carbon dioxide gas can be taken out and reused.

  The tank cleaning system described above is not limited to a tank used in a beer manufacturing process, and can be applied to other uses without departing from the gist of the present invention.

It is a figure which shows the structure of the tank cleaning system of embodiment which concerns on this invention. It is a figure which shows the structure of the conventional tank cleaning system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage tank 2 Upstream side pipe 3 Upstream pipe on-off valve 4 Downstream side pipe 5 Downstream pipe on-off valve 6 Pump 7 Cleaning device 11 Three-way valve 12 Branch pipe 13 Gas-liquid separation device 14 Exhaust pipe 15 Gas vent valve

Claims (2)

A sealed storage tank;
An upstream pipe on-off valve that can be switched between communication and blocking with respect to the storage tank, and an upstream pipe connected to the storage tank;
A downstream pipe connected to the storage tank, having a downstream pipe opening / closing valve capable of switching between communication and blocking with respect to the storage tank;
A pump that is arranged in the downstream pipe and pumps the stored liquid in the pipe downstream;
A cleaning device that supplies water and cleaning liquid into the storage tank via the upstream pipe in a state where a back pressure is applied by gas in the storage tank during a cleaning mode in which the storage tank is emptied and cleaned. Have
A branch pipe branched from the downstream pipe is provided between the storage tank and the pump in the downstream pipe, and the branch pipe and the downstream pipe can be communicated or blocked by the downstream pipe on-off valve. Connect a gas-liquid separator that separates gas and liquid to the branch pipe
In the non-cleaning mode, the branch pipe is shut off so as not to communicate with the downstream pipe, and the downstream pipe on / off valve is switched so that the stored liquid in the storage tank flows to the pump side in the downstream pipe,
In the cleaning mode, the branch pipe communicates with the downstream pipe so that water and cleaning liquid supplied into the storage tank flow from the downstream pipe to the branch pipe without accumulating in the storage tank. A tank cleaning system, wherein the downstream pipe opening / closing valve is switched to discharge the water and cleaning liquid separated by the gas-liquid separation device.   The gas-liquid separator has a degassing valve for releasing the separated gas, and the separated gas is released by intermittently opening and closing the degassing valve during the cleaning mode. The tank cleaning system according to 1.

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