JPH08192125A - Tank cleaning system - Google Patents

Abstract

PURPOSE: To provide a tank cleaning system which detects that cleaning liquid is ejected normally from a spray ball to hit the inner surface of a tank and verifies that cleaning in the tank is carried out correctly in cleaning CIP in plants for chemical products, foods, and pharmaceuticals, etc. CONSTITUTION: It is detected by a sensor and recorded by a recorder that cleaning liquid is ejected correctly from a spray ball 2 to the inner surface of a tank to be cleaned to validate that cleaning is conducted normally. In this way, it is recorded that at least the cleaning liquid is ejected normally in cleaning CIP in a plant, and data can be obtained to verify that cleaning is conducted normally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention verifies whether or not the cleaning liquid is in the tank as designed when performing CIP cleaning in a plant for chemical products, foods, pharmaceuticals and the like.

[0002]

2. Description of the Related Art CIP for CIP cleaning is Cleaning in Pl.
It is an abbreviation for ace and is called a cleaning method in place. In the production facilities for foods, pharmaceuticals, etc., it is necessary to keep the facilities clean for hygiene and quality control. However, in modern production facilities, it is disassembled because it consists of a closed can and complicated piping.
It takes a lot of time and effort to clean the inside. CIP cleans the inside of a facility by flowing a cleaning fluid without disassembling the facility.

As a method of CIP cleaning the inside of the tank,
There are a method of filling the cleaning liquid in the tank for cleaning, and a method of spraying the cleaning liquid on the inner surface of the tank by using a nozzle mounted in the tank to remove dirt. In the method of using the nozzle in the tank, there are a porous spray ball in which a large number of holes are formed at the tip of the nozzle, and a rotary spray ball in which the cleaning liquid ejection port is movable to eject the cleaning liquid. In addition, as for this related technology,
For example, literature: CIP System design and philosophy,
Journal of Society of Dairy Technology, Vo13, No.
1 January 1985 is mentioned.

[0004]

The rotary spray ball of the prior art described above has an advantage of high cleaning efficiency because the contact position of the cleaning liquid moves as compared with the porous spray ball, but the rotation is not easy. If it stops, normal cleaning cannot be performed even if the cleaning liquid is sent. On the other hand, the porous type has a problem that the cleaning liquid can always be applied only to the same position. In other words, the CIP cleaning can obtain a stable cleaning effect because the cleaning conditions can be kept constant, but if there is no external confirmation means, incomplete cleaning will be left as it is. , There is a problem of driving.

An object of the present invention is to provide a tank cleaning system capable of verifying that the nozzle for ejecting the cleaning liquid functions normally in cleaning the inside of the tank with a spray ball for CIP cleaning and that the cleaning liquid has hit the inner surface of the tank.

[0006]

In order to achieve the above object, when a spray ball is used for cleaning the inside of a tank, a verification system for detecting whether the cleaning liquid is normally ejected from the spray ball, for example, a spray Provide a verification system to measure PH, temperature, conductivity, etc. in the tank so that the abnormality can be detected when the hole of the ball is clogged or rotation stops, and the record of the measured value by that system is recorded. It is intended to use a recorder for.

[0007]

[Function] When using the cleaning in the tank, at least the target of the system to be detected by the verification system that detects that the cleaning liquid is spouting correctly and the system that records that proves that the cleaning liquid was operating normally at that time. It can be verified that the cleaning liquid has flowed to the portion.

[0008]

[Embodiment 1] An embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 1, when cleaning the inside of the tank 1, a PH sensor 4 is attached to detect that the cleaning liquid 3 is normally ejected from the spray ball 2. In order for this sensor to detect rotation failure of the rotary spray ball,
It is desirable that the cleaning liquid that does not directly come into contact is not collected and detected, that is, the side surface or the upper surface. In order to detect the rotation failure of the spray ball, it is desirable to install it at two locations.

Before the CIP cleaning is started, the PH sensor shows a value affected by the liquid or water droplets contained in the cleaning, or their dried products. Recording of these values is started by the recorder 5 before the start of CIP cleaning. When CIP cleaning starts, the PH sensor is affected by the cleaning solution, and the numerical value indicated by the PH sensor approaches the PH value of the cleaning solution. Also during this period, the change in PH value is recorded in the recorder 5.

In CIP cleaning, since the conditions for cleaning are constant, in a normal state, the change and value of the value left in the recorder 5 are almost constant. By recording these changes in the PH value in the recorder 5, if there is a rotation failure of the spray ball or the like, the cleaning liquid does not hit the PH sensor and the value of the PH sensor does not change. Further, even if the cleaning liquid indirectly hits the PH sensor due to the reflection in the tank, there is a difference in the change of the PH value as compared with the case where the cleaning liquid directly hits due to the normal rotation of the spray ball. Therefore, if the change in the PH value is recorded for each cleaning, it is possible to find out the abnormality by comparing the records, or at least to verify that there is no abnormality in the spray ball of the target tank. It is possible.

Another embodiment of the present invention will be described below.

[0012]

Second Embodiment Similar to the first embodiment, detection is performed by attaching an electric conductivity sensor as a cleaning liquid detecting device. The washing liquid usually exhibits high conductivity. This value is C
By recording the data for each IP cleaning, the data can be used for detecting abnormality of cleaning and detecting CIP cleaning as in the first embodiment.

[0013]

Third Embodiment Similar to the first and second embodiments, a temperature sensor is used as a cleaning liquid detecting device.

[0014]

Fourth Embodiment Not limited to the first, second, and third embodiments, an apparatus capable of detecting a cleaning liquid is used, the change thereof is recorded, and the same operation is performed.

[0015]

[Fifth Embodiment] In addition to the records shown in the first, second, third, and fourth embodiments, the execution time, the execution No., the data of the related equipment (the liquid amount in the cleaning liquid tank, the liquid temperature, the pressure on the secondary side of the pump Etc.) are simultaneously recorded on the recorder (5) to be used as data for verifying CIP cleaning.

[0016]

INDUSTRIAL APPLICABILITY The present invention verifies the cleaning of the inside of the tank by the CIP cleaning, and is particularly effective as a system capable of obtaining data for validating that the inside of the tank is properly cleaned in pharmaceutical products. Is.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a system for detecting that a cleaning liquid is normally ejected in CIP cleaning.

[Explanation of symbols]

1 ... Tank for cleaning, 2 ... Spray ball, 3 ... Cleaning liquid, 4 ... Sensor, 5 ... Recorder.

Claims (3)

[Claims] 1. A tank cleaning system characterized by verifying (validating) that the cleaning liquid is applied to the entire surface of the tank during CIP cleaning. 2. The tank cleaning system according to claim 1, wherein the detection device can be used to verify that the cleaning liquid is correctly discharged. 3. A device for recording the result obtained by the detection device according to claim 1 together with other conditions, and the recorded result is used for verifying that the inside of the tank has been cleaned normally. Tank cleaning system.