RU2709325C1 - Disinfectant preparation device - Google Patents

Abstract

FIELD: dosing and mixing devices.

SUBSTANCE: invention relates to a dosing and mixing device for preparation of a disinfectant aqueous solution based on hydrogen peroxide or peracetic acid. Device for preparation of disinfectant solution comprises a frame and functional units located on the frame: an air preparation unit, a water treatment unit, a vacuum ejector, unit for adjusting pressure of solution and air with pressure regulators, dispenser dispensing device, mixing tank, consumable tanks, container with disinfectant, unit for disinfectant injection, control panel with control panel, and traffic light tower. Functional units are connected by pipe layout including a system of valves, wherein vacuum ejector is made connected to pipe layout for creation of low pressure in it, and the disinfectant dispensing device comprises a tank and a strain sensor connected to the tank, which provides accurate metered supply of the disinfectant into the dispensing device.

EFFECT: optimizing the design of the device and providing accurate dosing, continuous preparation of the disinfectant solution.

6 cl, 5 dwg

Description

The invention relates to a new metering and mixing device for preparing a disinfecting aqueous solution of hydrogen peroxide or peracetic acid. The invention is applicable for the disinfection of any packaging, including for the assembly of lines of industrial packaging and filling equipment.

Disinfection of technological equipment, containers, etc., is mandatory and at the same time one of the most labor-intensive operations of all food production, largely predetermining the biological value, shelf life and safety of food consumption.

The level of technology. In the food industry, thermal, chemical disinfection, ultraviolet radiation, ionizing radiation, ultrasound, mechanical filtration and other methods are used to disinfect process equipment, containers, industrial premises and other objects of the technological process.

Due to the fact that in all countries the issue of hygiene is becoming increasingly relevant, the need for compact and economical devices providing sterilization and disinfectant solutions becomes more urgent.

Currently, based on the prior art, various types of devices (apparatuses) exist and are used in industrial production for the production of disinfectant solutions that differ in design features, depending on: the method of mixing the components (chemical, mechanical), the method of obtaining disinfectant properties (application of processes electrolysis, ozonation, electrochemical treatment), the composition of the mixed components, the volume of the mixed components, the spectrum of the disinfecting effect (bactericidal CTBA, including fungicidal, sporicidal, virucidal properties).

The applicant, after studying this technical field, does not have knowledge about the existence of devices for preparing a disinfectant solution with characteristics (features) similar to those of the claimed device.

Known devices that are similar in technical and design solutions to the claimed one can be considered - DIOX-C chlorine dioxide generators, 2005 and Wallace & Tiernan® DIOX-A 5000, 2013, from Siemens Water Technologies (http: // www .ecocontrol.ru / obezzarazhivanie-vody / dioxid-khlora / diox-a5000-tekhnologiya-kislota-khlorit /), with which it is possible to prepare an aqueous solution intended for disinfection of water.

The DIOX-C device contains, a vacuum chlorinator — a chlorine dosing device, a water supply unit, a chlorine dioxide storage tank, an injector, a reaction tank, an absorption device, a solution storage tank, a general alarm signaling device, an integral control box with a control panel.

To prepare the solution in the device, gaseous chlorine and sodium chlorite are used. Chlorine gas, the supply level of which is established using a remote vacuum chlorinator, is mixed with water to form a solution, which is then placed in a reaction vessel. As soon as a complete reaction of the used chemical components is achieved, the concentrated chlorine dioxide solution is diluted. The amount of dilution water is selected so as to achieve the desired concentration of chlorine dioxide. During the filling of the installation, the gas generated by the chlorine dioxide storage tank is sucked off using an injector.

The Wallace & Tiernan® DIOX-A 5000 is designed to prepare large quantities of chlorine dioxide at a concentration of 2500 to 5000 g / h. This plant uses hydrochloric acid and sodium chlorite 24.5% NaClO2 (substance Nadolyt C25) to generate chlorine dioxide. When hydrochloric acid reacts, sodium chlorite generates chlorine dioxide and sodium chloride and water. The main chemical components, i.e. hydrochloric acid and Nadolyt C25 are pre-diluted in the reaction tower. Valves for regulating the vacuum are installed on the suction openings of the aspirator type injector. This design provides that the two main chemical components will not be mixed until the minimum amount of water is contained in the injector. A solution of chlorine dioxide is generated in the reaction tower at a concentration of approximately 15 g / L ClO2. After achieving a complete chemical reaction, chlorine dioxide is immediately diluted with water to 2 g / l ClO2. The feed concentration of basic chemicals and dilution water is controlled by ball control valves and indicated on their respective flow meters.

The operation of the generator is determined by periodic cycles, which are controlled by level gauges installed in the tank for storing a solution of chlorine dioxide. Adjustable safety switches mounted on flowmeters for Nadolyt, hydrochloric acid, injector water and dilution water allow you to control the flow of these chemicals. Hydraulic and electrical interlocks prevent the malfunctioning of a fully automatic generator. Operating and alarm conditions are displayed on the control panel light circuit.

The disadvantages of such devices are the possibility of their use for obtaining only a solution of chlorine, the dosing of the concentrate and solution is carried out using centrifugal pumps, which reduces the reliability, tightness of the structure and does not allow the dosing of small and minimal volumes of concentrate and solution. In addition, the operation of the devices is determined by periodic cycles.

Closest to the claimed invention is a device - Disinfectant dispenser. The device is intended for the preparation and supply of a disinfectant solution based on hydrogen peroxide and peracetic acid (NAA) for disinfection of bottles during rinsing. Information about the device is available on the website food-prom.rf (http: //xn----itbisjcdi1f.xn--p1ai/5.html). The main components of the dispenser: disinfectant solution feed pump; metering pump; control Panel; water supply unit; water flow meter; buffer (expendable) capacity from stainless steel 50 l.

The dispenser is connected to the equipment in the water supply line to the rinse aid. Rinsing occurs with a very low concentration disinfectant solution, but sufficient for complete disinfection. Rinsing is not required since NUK disappears from the surface in a fraction of a second. The equipment is mounted on a stainless steel frame.

The dispenser device is simple and practical, however, the above disadvantages apply to this device, namely, the presence of pumps with corresponding wearing parts and insufficient tightness of the structure, the impossibility of accurate dosing of small doses of concentrate and solution, the cyclical nature of the device, determined by the limited volume of the supply capacity with a solution.

These shortcomings are essential in the practical industrial use of devices, due to the increased safety conditions for the use of chemical disinfectants in food and packaging industries.

Thus, there is an industrial need for a device for the preparation of a disinfectant solution, in which the above problems with dosing accuracy and tightness, continuity of operation and versatility in the use of a disinfectant are overcome.

The problem to which the claimed invention is directed is to create a fully automatic device and method of its operation, which allows to achieve the following technical results:

- optimization of the design of the device (the optimal number and technical performance of the work units);

- exact dosing, incl. and minimum doses of disinfectant;

- the continuity of the preparation of the disinfectant solution;

- universality, in terms of the choice of used concentrates of disinfectants for the preparation of the solution;

- tightness of the device system;

- a significant increase in the duration of the use of the device;

the ability to complete with various industrial production lines;

- Significant energy savings.

Disclosure of invention

The dosing and mixing device for preparing a disinfectant solution and the method of its operation proposed by the present invention is capable of fully and continuously performing a dosing and mixing process of a disinfectant (in the form of a concentrate), preferably hydrogen peroxide or peracetic acid and water, and as a result, obtain a disinfectant water solution. The process of preparing the solution is controlled by an electronic-software control panel with a control panel.

The simplicity of the design of the device is ensured by the optimal number and location of functional units. A device for preparing a disinfectant solution contains a skeleton and functional units located on the skeleton: an air preparation unit, a water preparation unit, a vacuum ejector, a unit for adjusting the solution pressure and air with pressure regulators, a disinfectant dosing device, a mixing tank, consumables, a container with a disinfectant , disinfectant injection unit, control panel with control panel, traffic light tower.

The frame is made in the form of a flat rectangular, vertically oriented plate with A-shaped handrails, rolling down into a horizontal base on adjustable screw supports. The base is made in the form of a deepened pallet.

The vacuum ejector, the unit for adjusting the pressure of the solution and air with pressure regulators, the metering device are located on the mounting plate, additionally mounted on the frame.

The invention contains the corresponding piping, namely pneumotubes, hydraulic tubes, a valve system for switching vacuum and high pressure flows, as well as fittings and sensors.

The air preparation unit contains an inlet stopcock with a silencer for smooth pressure relief when the device is turned off, a line of filters, an air pressure switch.

Air is supplied to the pneumatic system through the air preparation unit, the control air pressure switch is activated. The air pressure switch is configured to operate at 0.5 MPa, at a lower pressure, the device stops emergency.

The water preparation unit contains a ball valve, a pressure regulator with an integrated coarse filter, a pressure gauge, a water pressure switch, a fine filter, and a water supply valve.

Water is supplied through the water preparation unit, the control pressure switch is activated. The water pressure switch is configured to operate at 0.1 MPa, with a lower pressure, the device stops emergency.

The disinfectant dosing device is made in the form of a small vertically oriented cylindrical tank placed in a U-shaped steel protective holder and connected to a strain gauge (strain gauge). The load cell includes a housing for the load cell, the load cell itself and a wired connection system. The dose set of the disinfectant to the concentrate dosing device comes from the container with the disinfectant, is measured using a strain gauge and depends on the required concentration. The concentration of the solution is set from the control panel of the electronic-software panel, the required amount of disinfectant is calculated based on the maximum volume of the mixing tank and the density of the concentrate.

The load cell has a very high measuring accuracy, which allows you to dose, if necessary, the minimum amount of disinfectant.

The mixing tank is designed to mix disinfectant and water in a given concentration and is made in the form of a volumetric vertically oriented cylinder. At the beginning of the operation of the device, a small amount of water is collected in the mixing tank to absorb the gases generated when the disinfectant is supplied. During operation, a certain amount of disinfectant and water specified in the control program is automatically mixed in the mixing tank. To determine the fill level, the mixing tank contains level sensors. Subsequently, the mixing tank is automatically maintained with a filled solution.

The continuity of the process is ensured by the presence in the device of the mixing tank, which is constantly filled and at least two consumable tanks, replenished from the mixing tank as it is consumed.

Consumable tanks are designed to be filled with a ready-made disinfectant solution and fed through valves for future use. Consumable tanks are made in the form of volumetric elongated vertically oriented cylinders. When using the solution to the average level of the supply tank, the filling of the corresponding supply tank is turned on.

The unit for adjusting the pressure of the solution and air is designed to adjust the supply pressure of the resulting disinfectant solution for further use in the disinfecting treatment of containers and contains indicators of the pressure of the solution and air and pressure regulators.

The disinfectant is supplied from a container with a disinfectant, which is specially located on the pallet of the horizontal base of the frame.

The absence of disinfectant in the tank is determined by the control time for filling the tank of the metering device, in this case a red signal of a traffic light tower appears. In order to ensure the continuity of the solution preparation process, the empty container should be replaced within a certain time, 120 sec. maximum.

The injection site of the disinfectant concentrate contains an immersion tube for taking the disinfectant from the container, a filter, a ball valve and is located above the inlet of the container.

The tightness of the entire system is ensured by applying pneumatic feed to all mixing components.

The universality of the choice of disinfectant for use is achieved through the use of a weight dosing method in the device.

Brief Description of the Drawings

The invention is illustrated by drawings, where:

in FIG. 1 shows a front view of a device;

in FIG. 2 shows a rear view of the device;

in FIG. 3 shows an air preparation unit;

in FIG. 4 shows a water treatment unit;

in FIG. 5 shows a disinfectant dosing device.

The implementation of the invention

According to FIG. 1 and FIG. 2, a device for preparing a disinfectant solution contains a frame 1 and functional units located on the frame: an air preparation unit 2, a water preparation unit 3 (Fig. 2), a vacuum ejector 4, a solution pressure and air pressure adjusting unit with pressure regulators 5, a disinfectant dosing device containing a tank 6 and a strain gauge (strain gauge) 7, a mixing tank 8, consumables 9, a container with a disinfectant 10, a disinfectant injection unit 11, a control panel with a control panel 12, a traffic light tower 13.

During operation of the valve system and vacuum ejector 4 and the creation of a below-atmospheric pressure metering device in the tank, the necessary amount of disinfectant is taken from the tank 10 into the metering device tank 6, based on the desired concentration of the disinfectant solution. The calculation of the required amount of disinfectant for feeding is determined using a strain gauge (strain gauge) 7. weight weighing method. Then, when creating increased pressure in the tank of the metering device 6, using a valve system, a measured amount of disinfectant from the tank of the metering device 6 is fed to the mixing tank 8. In the mixing tank 8, the sanitizer is diluted to the desired concentration with water, using level sensors and a system water supply. Next, from the mixing tank 8, the solution is poured into the supply tanks 9 without stopping the operation of the device. The device can maintain the supply tanks 9 constantly filled. The supply of the finished disinfectant solution for further use occurs through special valves when setting the required air pressure in the supply tanks 10 on the block for adjusting the solution pressure and air 5.

It is also possible mixing and filling the supply tanks 9 with a disinfectant solution of different concentrations, provided that the relevant parameters are entered (set) in the control program through the control panel 12.

Air preparation unit 2, FIG. 3, contains an inlet stopcock 24 with a silencer 14, for smooth pressure relief when the device is turned off, a line of filters 15, an air pressure switch 16.

The water preparation unit 3, FIG. 4, comprises a ball valve 17, a pressure regulator with an integrated coarse filter 18, a pressure gauge 19, a water pressure switch 20, a fine filter 21, a water supply valve 22.

Disinfectant dispenser, FIG. 5, is made in the form of a small vertically oriented tank 6 of a cylindrical shape, placed in a U-shaped steel protective holder 23 and connected to a load cell (strain gauge) 7.

The claimed technical solution of the device for the preparation of the disinfectant solution and the method of its operation is new and eliminates the disadvantages existing in the technical solutions of the devices available today and, moreover, is very convenient and safe for use in production. The design of the device is simple and straightforward, and the way the device works is unique.

A device for the preparation of a disinfectant solution can be easily manufactured in serial production.

Claims (6)

1. A device for the preparation of a disinfectant solution of hydrogen peroxide or peracetic acid containing a frame and functional units located on the frame: air preparation unit, water preparation unit, vacuum ejector, unit for adjusting the solution pressure and air with pressure regulators, disinfectant dosing device, mixing tank at least two supply tanks, a container with a disinfectant, a disinfectant injection unit, a control panel with a control panel, a traffic light tower, I distinguish it lies in the fact that the functional units are connected by a pipe wiring, including a valve system, while the vacuum ejector is connected to the pipe wiring to create a reduced pressure in it, and the disinfectant dispensing device contains a tank and a strain gauge connected to the tank, which ensures accurate dosing of the disinfectant into dispensing device. 2. A device for preparing a disinfecting solution of hydrogen peroxide or peracetic acid according to claim 1, characterized in that the air preparation unit comprises an inlet stopcock with silencer, a line of filters, an air pressure switch. 3. A device for preparing a disinfecting solution of hydrogen peroxide or peracetic acid according to claim 1, characterized in that the water preparation unit comprises a ball valve, a pressure regulator, with an integrated coarse filter, a pressure gauge, a water pressure switch, a fine filter, a water supply valve . 4. A device for preparing a disinfecting solution of hydrogen peroxide or peracetic acid according to claim 1, characterized in that the tank of the disinfectant dispensing device is made in the form of a vertically oriented cylinder and placed in a U-shaped holder. 5. A device for preparing a disinfecting solution of hydrogen peroxide or peracetic acid according to claim 1, characterized in that the mixing tank is made in the form of a volumetric, vertically oriented cylinder. 6. A device for preparing a disinfectant solution of hydrogen peroxide or peracetic acid according to claim 1, characterized in that the disinfectant injection unit comprises an immersion tube for disinfectant intake, a filter, a ball valve.

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