RU71270U1 - INSTALLATION OF SANITARY PROCESSING - Google Patents

Abstract

The utility model relates to sanitization devices without disassembling washable objects, and can be used for cleaning pipelines and equipment at food industry enterprises.

The sanitization installation contains several tanks 1 connected to the washing object 2 by the supply and return circuits. The return circuit includes a return pump 5, a device for creating a vacuum 7 and a vacuum tank 6, made in the form of a cylinder with a bottom in the form of a cone facing upward. Inlet and outlet pipes are tangentially attached to the cylinder wall. The cylinder on top is hermetically sealed with a cap.

During sanitization, liquid from the tank 1 is pumped by the feed pump 4 along the supply circuit to the sink 2.

Using a device for creating a vacuum 7, a vacuum is created in the vacuum tank 6, by which the liquid from the washing object 2 is transported through the return circuit pipe. In the vacuum tank, the liquid is released from the air and enters the return pump 5, and then into the tank 1, completing the circulation circle.

Due to the design of the bottom of the vacuum tank, an air funnel is practically not formed, which, together with the complete separation of the gas fraction, ensures reliable operation of the return pump 5 in the calculated mode.

1 s.p. f-ly; 2 ill.

Description

The utility model relates to sanitization devices without disassembling washable objects, and can be used for washing pipelines and equipment, for example, in technological lines of food industry enterprises.

According to the “Instructions for the sanitary processing of equipment, inventory and containers at dairy enterprises”, the mandatory regulations for washing facilities must contain at least 4 operations with a total duration of at least 20 minutes. In practice, especially at night and in the evening, both the sequence and the temperature-time parameters of sanitation are not always observed, which very seriously affects the quality of the products obtained.

The use of an automated control system eliminates the influence of the human factor on one of the most critical processes of a processing enterprise. In the currently used sanitation plants, the washing program is maintained by controlling the operating time of the supply and return pumps.

The operating time of the pumps is determined by their theoretical supply, but in practice, the operation of the return pump is greatly influenced by the formation of a funnel in the washing facility, which is especially typical for tanks with a conical bottom. The resulting vortex funnel with an air core penetrating the drain pipe significantly reduces its throughput. And air entering the centrifugal return pump installed near the washing facility causes a deterioration in its performance or even a complete loss of performance.

On the other hand, with a long length of the pipelines of the return circuit, the guaranteed filling of the working cavity of the return pump, which is part of the sanitization unit with returning liquid, is not ensured, which also affects its flow rate characteristic.

Subject to the correct ratio between the capacity of the feed pump and return pumps, the minimum amount of liquid necessary for reliable operation of the centrifugal return pump in accordance with its calculated characteristic remains in the washing facility and return pipe. This is possible when you turn on the pumps and switch the pipeline valves return circuit with some delay (delay), individual for each object of washing. The presence of delays ensures minimal mixing of detergent solutions with displacing water and, as a result, a decrease in their concentration.

However, the exact setting of the time parameters is impossible due to the unpredictable formation of a funnel and the return routes varying in length and configuration of the pipelines. As a result, the washing liquid is not completely removed from the tank and pipelines, the remaining liquid causes mixing of the solutions, their contamination and loss of a given concentration.

A known installation of sanitization containing containers of detergent solutions and rinsing water, feed and return pumps, a heater of the supplied solutions [1]. The disadvantage of this device is the lack of devices to ensure the complete collection and return of detergent solutions.

In a sanitization unit (US Pat. No. 3,448,745), the collection and return of cleaning solutions from the washing facility is carried out using an ejector [2]. However, with a significant length of the return circuit and correspondingly significant hydraulic resistance, it will be necessary to install a high-pressure feed pump that consumes more power.

The proposed installation of sanitization contains at least one reservoir for the washing solution connected to the supply and return circuits with the washing facility. Depending on the available washing facilities, the installation can additionally be equipped with tanks, for example, for rinsing water, disinfectant, etc.

The circuits include pipelines and pipe fittings, and the supply circuit additionally contains a feed pump and a detergent heater, and the return circuit contains a return pump and a vacuum tank installed in front of it, connected to the device for creating a vacuum, located at the end of the return circuit. Also, various instrumentation can be included in the composition of the circuits.

To exclude funnel formation and pricing in a vacuum tank, the latter is made in the form of a cylinder, the bottom of which is made in the form of a cone facing upward. In the upper part, the inlet is tangentially connected to the cylinder wall, and in the lower part - outlet pipes. The tangential feed into the vacuum tank provides the formation of a thin film of fluid rotating along the cylinder wall. The action of the centrifugal effect of the separation of the gas and liquid phases and the mixing of the layers in the film of a rotating liquid increases the intensity of the release of dissolved gases under vacuum.

The design of the bottom and the outlet nozzle provides an effective extinguishing of the funnel and foam, thus determining the stable operation of the return pump.

The return circuit, irrespective of its length and configuration, is guaranteed to be freed of residues of the washing solution due to the vacuum created in the vacuum tank. The vacuum tank located in front of the pump ensures that the working cavity of the return pump is filled. Thus, the calculated flow characteristic of the pump is ensured, due to complete emptying, mixing of solutions is practically absent and the consumption of washing solutions is reduced as a result of eliminating a decrease in the concentration of washing solutions as a result of mixing.

This utility model is illustrated in the drawing.

Figure 1 shows a schematic diagram of the installation of sanitization, figure 2 shows the design of the vacuum tank.

The sanitization installation contains several tanks 1, for example, for rinsing water, washing and disinfecting solutions, connected to the washing object 2 by the supply and return circuits. The supply circuit contains a feed pump 3, a heater for detergent solutions 4, as well as pipelines, necessary pipe fittings and measuring equipment.

The return circuit includes a return pump 5 and a vacuum tank 6 installed in front of it, connected to a device for creating a vacuum 7.

The vacuum tank 6 is made in the form of a cylinder 8 (figure 2), the bottom of which is made in the form of a cone 9, facing the top up. In the upper part, a supply 10 is tangentially connected to the cylinder wall, and in the lower part a branch pipe 11 is discharged. The cylinder is sealed on top by a cover 12.

Installation works as follows. When fulfilling the sanitation procedure, for example, during rinsing, the liquid from the tank 1 is pumped by the feed pump 4 through the feed circuit through the heater of the cleaning solutions 3, where it is heated to the required temperature, and through the washing head it enters the sink 2.

Using a device for creating a vacuum 7, made for example in the form of a vacuum generator in the form of an ejector, a vacuum is created in the vacuum tank 6, through which the liquid from the washing object 2 is transported through the return circuit pipeline. Getting through the tangentially connected inlet pipe 10, the liquid is distributed along the wall of the cylinder 8 in the form of a rotating film. Under the action of the centrifugal effect of separation of gas and liquid phases and under the action of vacuum, the liquid is released from the air and through a tangentially connected outlet pipe 11 enters the return pump 5, and then into the tank 1, completing the circulation circle.

Since the bottom of the vacuum tank is made in the form of a cone 9 facing upward, an air funnel is practically not formed, which, together with the complete separation of the gas fraction through the device for

creating a vacuum 7 ensures reliable operation of the return pump 5 in the calculated mode.

Using the proposed sanitization installation ensures, by organizing the collection and return of residues of detergent solutions by creating reduced pressure in the washing facility and return circuit, high-quality sanitization in accordance with the regulations and reduces the consumption of detergent solutions by eliminating the reduction in their concentration as a result of mixing. Eliminating the unstable operation of the return pump allows you to automate the implementation of the sanitation procedure due to the guaranteed observance of the design characteristics of the pumps.

Literature

1. CIP-sinks of the Protemol series // Dairy industry. 2003. No4. C.4. - prototype.

2. US Patent 5603826 IPC B08B 3/04, 13/00 Tank cleaning-in-place pumping system / James E. Seeley.

Claims (2)

1. Sanitization installation containing at least one reservoir for the washing solution connected by the supply and return circuits to the washing object, the circuits include pipelines and pipe fittings, moreover, the supply circuit further comprises a feed pump and a detergent heater, and the return circuit contains return pump, characterized in that the return circuit contains a vacuum tank installed in front of the return pump and connected to a device for creating a vacuum. 2. The sanitary treatment installation according to claim 1, characterized in that the vacuum tank is made in the form of a cylinder with a bottom in the form of a cone facing upward, an inlet pipe is attached to the cylinder wall at the top, and a discharge pipe is attached at the bottom, and the pipes are connected tangentially, and the cylinder is closed by a cover.