JP2008043886A - Apparatus for cleaning food filling container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize the fear of supplying a cleaning waste water insufficiently sterilized as a cleaning water when enabling the cleaning waste water generated from a cleaning device to be reused as a cleaning water and to prevent a filtering capacity of a filtering device from declining early. <P>SOLUTION: The apparatus for cleaning food-filling containers comprises a cleaning device 3 which cleans unused food-filling containers 1 with a cleaning water 2, a cleaning water supplying device 4, wherein the cleaning device is provided with a waste water receiver 9 for storing a waste cleaning water 7 generated in the cleaning device, a chemical agent infusing device 16 which infuses a sterilizing chemical agent to the waste cleaning water drawn from the waste water receiver, and a membrane filtering device 11 which filters out the waste cleaning water infused with the sterilizing chemical agent by the chemical agent infusing device in order to be able to supply the waste cleaning water filtered out by the membrane filtering device to the cleaning device as a cleaning water. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a food filling container cleaning facility provided with a cleaning device for cleaning an unused food filling container with cleaning water and a cleaning water supply device for supplying cleaning water to the cleaning device.

The above-mentioned food filling container cleaning equipment cleans unused food filling containers with washing water before filling liquid food such as beverages or solid food into food filling containers such as unused cans and bottles. In order to do this, the waste water generated by the cleaning device has been discarded.
Although it is not a cleaning facility for food filling containers, in cleaning facilities that clean containers such as food transport containers with cleaning water, the cleaning waste water after cleaning the containers can be reused as cleaning water. A wastewater receiving tank for storing cleaning wastewater, a membrane filtration device for membrane filtering the cleaning wastewater taken out from the wastewater receiving tank, and an ultraviolet sterilizer for sterilizing the cleaning wastewater membrane-filtered by the membrane filtration device with ultraviolet rays The cleaning waste water after being sterilized with can be supplied as cleaning water (for example, see Patent Document 1).

JP 2000-246206 A

Therefore, in the food filling container cleaning equipment, the cleaning water supply device stores the waste water receiving tank that stores the cleaning waste water generated by the cleaning device, and takes out the waste water receiving tank so that the cleaning waste water generated by the cleaning device can be reused. A membrane filtration device for membrane filtration of the washed wastewater, and an ultraviolet sterilizer for sterilizing the washing wastewater membrane-filtered by the membrane filtration device with ultraviolet rays, and washing the wastewater after sterilization with ultraviolet rays for washing food filling containers It can be considered that the water can be supplied.
However, since the cleaning wastewater is sterilized through the UV sterilizer, there is no sterilizing ability for the cleaning wastewater after passing through the UV sterilizer, until the cleaning wastewater that has passed through the UV sterilizer is supplied to the cleaning device. If it is contaminated during this period, there is a risk that cleaning wastewater with insufficient sterilization will be supplied as cleaning water.
In addition, since a membrane filtration device is provided for membrane filtration of washing wastewater before sterilization, microorganisms in the washing wastewater adhere to the filtration membrane and multiply, and the filtration membrane is clogged early due to deposition of slime, There exists a fault which the filtration capacity of a membrane filtration apparatus tends to fall early.
The present invention has been made in view of the above circumstances, and in making it possible to reuse the cleaning wastewater generated in the cleaning device as the cleaning water, there is a risk that the cleaning wastewater with insufficient sterilization may be supplied as the cleaning water. An object of the present invention is to prevent an early decline in the filtration capacity of the membrane filtration device.

  A first characteristic configuration of the present invention is a food filling container cleaning facility provided with a cleaning device for cleaning an unused food filling container with cleaning water, and a cleaning water supply device for supplying cleaning water to the cleaning device. A waste water receiving tank for storing cleaning waste water generated in the cleaning apparatus, a chemical addition apparatus for adding a sterilizing agent to the cleaning waste water taken out from the waste water receiving tank, and the chemical addition apparatus. And a membrane filtration device for membrane filtration of the cleaning wastewater to which the sterilizing agent is added, and the cleaning wastewater membrane-filtered by the membrane filtration device can be supplied to the cleaning device as cleaning water. is there.

[Action and effect]
A cleaning water supply device for supplying cleaning water to the cleaning device, a waste water receiving tank for storing cleaning waste water generated by the cleaning device, a chemical addition device for adding a sterilizing agent to the cleaning waste water taken out from the waste water receiving tank, and a chemical adding device In addition, a membrane filtration device for membrane-washing the cleaning wastewater to which the sterilizing agent is added is provided so that the cleaning wastewater to which the sterilizing agent is added can be supplied to the cleaning device as cleaning water after membrane filtration. Before the washing wastewater passes through the membrane filtration device, the microorganisms in the washing wastewater are easily decomposed by the sterilizing agent, the microorganisms are difficult to adhere to the filtration membrane, and the filtration membrane is not easily clogged with slime. The cleaning waste water can be supplied to the cleaning device as cleaning water while maintaining the sterilizing action of the sterilizing agent until the cleaning water is supplied as cleaning water.
Therefore, in making it possible to reuse the cleaning wastewater generated in the cleaning device as the cleaning water, there is little possibility that the cleaning wastewater with insufficient sterilization will be supplied as the cleaning water, and the filtration capacity of the membrane filtration device may be reduced early. Can be prevented.

  The second characteristic configuration of the present invention is that a filtration membrane having a pore diameter of 0.01 μm to 0.1 μm is attached to the membrane filtration device.

[Action and effect]
The size of organic substances that may adhere to the food filling container during the manufacturing process, storage process, distribution process, etc. is generally considered to be 0.2 μm or more, but the pore size of the membrane filtration device is 0.01 μm to 0 μm. Since a 1 μm filter membrane is attached, it is possible to filter while reliably removing such organic substances, and it is easy to capture viruses having a size of 0.01 μm or more.

  A third characteristic configuration of the present invention is that the chemical addition device is configured to inject hypochlorite into the cleaning wastewater so that the concentration becomes 0.2 ppm to 1.0 ppm.

[Action and effect]
Since the chemical addition apparatus can inject hypochlorite into the cleaning wastewater so that the concentration becomes 0.2 ppm to 1.0 ppm, the cleaning wastewater is used as a quality standard for tap water (0.5 ± 0. It is possible to supply the washing water satisfying 3 ppm) and to reuse the washing waste water as washing water in which microorganisms hardly grow.

  A fourth characteristic configuration of the present invention is that a heating device for heating the cleaning waste water taken out from the waste water receiving tank is provided so that the cleaning waste water heated by the heating device can be supplied to the cleaning device.

[Action and effect]
Cleaning wastewater that has been sterilized by heating with a heating device can be supplied as cleaning water, and when the supply of cleaning water to the cleaning device is stopped and then restarted, the cleaning wastewater that has accumulated in the wastewater receiving tank when the supply is stopped Can be sterilized by heating with a heating device and supplied as washing water.
Also, during the maintenance of the food filling container cleaning facility, the water for line cleaning heated by the heating device is circulated through the cleaning water circulation line across the cleaning device and the cleaning water supply device, and the cleaning water circulation line is sterilized by heating. You can also.

  The fifth characteristic configuration of the present invention is that the cleaning waste water heated by the heating device can be supplied to the cleaning device after being subjected to membrane filtration in the membrane filtering device.

[Action and effect]
Filtration of the high-temperature washing wastewater heated by the heating device in the membrane filtration device enables heat-sterilization of the filtration membrane, making it difficult for microorganisms to further adhere to the filtration membrane and clogging of the filtration membrane due to slime etc. Is even less likely to occur.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a food filling container washing facility (rinser) according to the present invention, a washing device 3 for washing an unused food filling container 1 with washing water 2, and a washing for supplying washing water 2 to the washing device 3 A cleaning water circulation line 5 that circulates the cleaning water 2 (7) across the water supply device 4, the cleaning device 3, and the cleaning water supply device 4 is provided.

  The said washing | cleaning apparatus 3 is the can body part which integrally formed the can cylinder and the can bottom among the metal cans (2 piece cans) which fill and seal drinks, such as beer, as an unused food filling container. The cleaning nozzle device 6 for cleaning the inner and outer surfaces of 1 in an unused state before filling with the beverage, and spraying the cleaning water 2 toward the inner and outer surfaces of the can body 1 and the generated cleaning waste water 7 A water collecting pan 8 is provided.

  The cleaning water supply device 4 includes a waste water receiving tank 9 for storing the cleaning waste water 7 collected by the water collecting pan 8, a heating device 10 for heating the cleaning waste water 7 taken out from the waste water receiving tank 9, and the cleaning that has passed through the heating device 10. A membrane filtration device 11 for membrane filtering the waste water 7 is provided, and the washing waste water 7 in the waste water receiving tank 9 is heated by driving a pump 12 provided in a connection pipe connecting the waste water receiving tank 9 and the heating device 10. The cleaning waste water 7 which is passed through the apparatus 10 and the membrane filtration apparatus 11 in order and membrane-filtered by the membrane filtration apparatus 11 is provided so as to be supplied to the cleaning apparatus 3 as the cleaning water 2.

  The waste water receiving tank 9 is filled with a replenishing water supply line 13 for replenishing fresh water, a device for heating a beverage after filling and sealing a part of the washing waste water 7 in the tank to a room temperature, A supply line 14 is connected to the apparatus for washing away the beverage adhering to the container when the container is filled and sealed.

  And the chemical | medical agent addition apparatus 16 which adds the chemical | medical agent for disinfection to the washing waste water 7 which passes through the connecting pipe line 15 is connected to the connecting pipe line 15 which connects the heating apparatus 10 and the membrane filtration apparatus 11, and a chemical | medical agent is connected. The washing waste water 7 to which the sterilizing agent is added by the addition device 16 is provided so that it can be filtered by the membrane filtration device 11 and supplied to the washing device 3 as the washing water 2.

  The heating device 10 is provided with a heat exchanger that heats the cleaning waste water 7 with high-temperature steam. During normal cleaning operation, the supply of the high-temperature steam to the heat exchanger 10 is stopped and cleaning is performed. When the waste water 7 is supplied to the cleaning device 3 as the cleaning water 2 without heating, and the supply of the cleaning water 2 to the cleaning device 3 is stopped and then restarted, high-temperature steam is supplied to the heat exchanger 10 The cleaning waste water 7 accumulated in the waste water receiving tank 9 or the like when the supply is stopped is sterilized by heating to, for example, about 80 ° C. and subjected to membrane filtration in the membrane filtration device 11 and then supplied to the cleaning device 3 as the cleaning water 2 or filled with food. At the time of maintenance of the container cleaning equipment, high-temperature steam is supplied to the heat exchanger 10, for example, water for line cleaning heated to about 80 ° C. is circulated to the cleaning water circulation line 5, and the cleaning water circulation line 5 is heated and sterilized. Configured to be able to .

  Even during normal cleaning operation, high-temperature steam may be supplied to the heat exchanger 10 and the heat-sterilized cleaning waste water 7 may be supplied as the cleaning water 2 to the cleaning device 3.

  The chemical addition device 16 is a device in which sodium hypochlorite is introduced into the washing waste water 7 so that the concentration becomes 0.2 ppm to 1.0 ppm. Usually, the water quality standard of tap water is 0.5 ±. The amount is to be 0.3 ppm.

  The membrane filtration device 11 is equipped with a filtration membrane having a pore diameter of 0.01 μm to 0.1 μm, that is, an external pressure equipped with a membrane module of a separation membrane in a precision filter (MF) region or an ultrafiltration membrane (UF membrane) region. It is composed of a filtration type membrane filtration device.

  The graph of FIG. 2 shows the TOC of the cleaning wastewater (hereinafter referred to as raw wastewater) 7a in the wastewater receiving tank 9 and the cleaning wastewater (hereinafter referred to as filtration wastewater) 7b after passing through the membrane filtration device 11 in the food filling container cleaning facility. It shows changes with time in (total organic carbon) and COD (chemical oxygen demand).

  From this graph, it can be seen that the TOC of the raw wastewater 7a is always below the tap water quality standard TOC (5 mg / L), and the COD of the raw wastewater 7a is always substantially below the water quality management target value COD. Further, it can be seen that the TOC of the filtered wastewater 7b is always much lower than the tap water quality standard TOC (3 mg / L), and the COD of the filtered wastewater 7b is always lower than the water quality management target value COD.

  The graph of FIG. 3 shows the turbidity and chromaticity change of the raw waste water 7a and the filtered waste water 7b in the food filling container cleaning facility, and the turbidity of the raw waste water 7a is the tap water quality standard turbidity (2 degrees ), The chromaticity of the raw waste water 7a and the filtered waste water 7b is always far below the tap water quality standard chromaticity (5 degrees), and the turbidity of the filtered waste water 7b is always larger than the tap water quality standard turbidity. You can see that it is below.

  By the way, in the food transport container washing system described in the above cited reference 1, as a result of performing the adsorption treatment by passing the filtered wastewater through the activated carbon treatment device, the TOC is 30 mg / L before treatment, and after treatment. As can be seen from the fact that it has been reduced to 4 mg / L, highly contaminated cleaning wastewater generated in the cleaning device is treated.

  In contrast, in the food filling container cleaning facility according to the present invention, the TOC of the raw waste water 7a is reduced to 4 to 5 mg / L, whereas the TOC of the filtered waste water 7b is reduced to 2 to 3 mg / L. As can be seen, it is understood that the cleaning wastewater 7 with very little pollution is being treated.

[Other Embodiments]
1. The container filling equipment for food filling according to the present invention may be a washing equipment for washing food filling containers such as unused glass bottles and resin containers with washing water.
2. The food filling container cleaning facility according to the present invention is provided with a cleaning device for cleaning an unused food filling container with cleaning water supplied from a cleaning water supply device, and further cleaning the cleaned container with clean water. May be.

Schematic diagram of food filling container cleaning equipment Graph showing TOC / COD change over time of cleaning wastewater Graph showing turbidity and chromaticity change over time of washing wastewater

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container for food filling 2 Washing water 3 Washing apparatus 4 Washing water supply apparatus 7 Washing wastewater 9 Wastewater receiving tank 10 Heating apparatus 11 Membrane filtration apparatus 16 Drug addition apparatus

Claims (5)

A food filling container cleaning facility provided with a cleaning device for cleaning an unused food filling container with cleaning water, and a cleaning water supply device for supplying cleaning water to the cleaning device,
A waste water receiving tank for storing cleaning waste water generated in the cleaning apparatus, a chemical addition apparatus for adding a sterilizing chemical to the cleaning waste water taken out from the waste water receiving tank, and a sterilizing chemical in the chemical addition apparatus And a membrane filtration device for membrane filtration of washing wastewater to which is added,
A food filling container cleaning facility configured to be able to supply cleaning wastewater that has been membrane filtered by the membrane filtration device to the cleaning device as cleaning water.   2. The container filling equipment for food filling according to claim 1, wherein a filtration membrane having a pore diameter of 0.01 μm to 0.1 μm is attached to the membrane filtration device.   The container filling equipment for food filling according to claim 1 or 2, wherein the chemical addition device is for charging hypochlorite to a concentration of 0.2 ppm to 1.0 ppm into the washing waste water.   The food according to any one of claims 1 to 3, wherein a heating device for heating the washing waste water taken out from the waste water receiving tank is provided so that the washing waste water heated by the heating device can be supplied to the washing device. Container cleaning equipment for filling.   5. The container filling equipment for washing food filling according to claim 4, wherein the washing waste water heated by the heating device can be supplied to the washing device after being membrane-filtered by the membrane filtration device.

Images