RU170785U1 - REAGENT DOSING DEVICE - Google Patents

Abstract

The utility model relates to the field of dosing of reagent into pipelines in heat engineering and hydraulic systems (steam and hot water boilers, boilers, heating networks and hot water supply systems). The device consists of a flow meter installed on the pipeline that is electrically connected to the controller, a metering pump equipped with inlet and outlet hoses, which doses the reagent into the pipeline, which is electrically connected to the controller, and in addition to the pipe after the reagent entry point, an electrochemical sensor is installed that is electrically connected to the controller . Using the proposed device can reduce the consumption of the reagent by increasing the accuracy of dosing, to exclude the possibility of exceeding the maximum permissible concentration of the reagent in the treated fluid.

Description

The utility model relates to the field of dosing of reagent into pipelines in heat engineering and hydraulic systems (steam and hot water boilers, boilers, heating networks and hot water supply systems). The use of reagents makes it possible to exclude the possibility of scale formation on heat transfer surfaces and deposits in pipelines, to prevent or significantly slow down the corrosion of metal parts of the equipment without violating the operating mode of the equipment, and to remove existing scale and corrosion products. These tasks are solved by introducing into the water used to power the heat engineering devices, small amounts of special complexon reagents. For the treatment of water in heating systems of various types, various complexones are used, which are allowed by sanitary norms and rules, in certain doses.

A known dispenser for liquid reagents, containing a container for a reagent and a device for the selection of dynamic pressure located in the main stream, characterized in that the device for the selection of dynamic pressure is made in the form of a ball with two holes located at an angle to each other and communicating with the container for reagent through two connecting tubes, the ball is made to rotate around an axis perpendicular to the direction of the main flow, and the axis of one of the holes coincides with the axis of rotation ball (see patent No. 2256883, class. F17D 3/12, "Dispenser for liquid reagents"). The disadvantage of this dispenser is that it creates significant hydraulic resistance to fluid flow. This does not allow its use in systems with low working pressures, in systems with a large range of changes in fluid flow in the low flow area.

The closest in technical essence and the achieved results to the proposed device is a device for dispensing a reagent into a pipeline (see S. Cherkasov "Metering pumps: types, selection, installation" // Journal "Plumbing. Heating. Air conditioning", 2006 - No. 1), consisting (Fig. 1) of a flow meter 2 installed on the pipeline 1, electrically connected to the controller 3, a metering pump 4, which doses the reagent into the pipeline 1. The controller receives a signal from the flow meter and calculates the cumulative volume of the liquid. Upon reaching the value of the volume of the specified value, the controller turns on the metering pump for the time required to supply the calculated dose of the reagent to the pipeline, which is set in proportion to the given volume of liquid.

The disadvantage of this device is that it does not provide operational control over the current characteristics of water (for example, hydrogen pH, electrical conductivity, oxygen content), although over time (for example, seasonally) the water into which the reagent is added may change its characteristics that determine the rate of corrosion in pipelines. Lack of operational monitoring of water characteristics can lead to both insufficient and excessive dosing of reagents into the treated water, to the possibility of exceeding the maximum permissible concentration of the reagent in the treated water, normalized in SanPiN.

The purpose of the proposed device for dosing reagents is to eliminate the possibility of modes of insufficient and excessive dosing of reagents when changing the properties of the treated water, to ensure that the maximum permissible concentration of the reagent in the treated water is not exceeded.

Disclosure of a utility model. To achieve this goal, an electrochemical sensor 5 is installed in the pipeline after the point of entry of the reagent (for example, a potentiometric pH electrode for measuring the hydrogen index of water, a conductometric sensor for determining water resistance and salinity, a redox sensor for determining the oxygen content in water, etc. ) electrically connected to the controller (Fig. 2).

The term used in the utility model formula - “electrochemical sensor”, is defined as generalized for a group of sensors in the field of application of the utility model (see A. A. Egorov. “Systematics, principles of operation and applications of sensors” // “Journal of Radio Electronics”, 2009 - No. 3 - “in the electrochemical sensor, the detected component reacts with the sensitive layer directly on the electrode or in the volume of the solution layer near the electrode. The following are distinguished among electrochemical sensors: potentiometric, amperometric, conduct an insulating, coulometric ").

The start-up time of the metering pump 4, calculated in proportion to the volume of water recorded by the flowmeter 2, controller 3 corrects in accordance with the current value of the parameter being monitored in the treated water, measured by the electrochemical sensor 5, using a controller programmatically implemented in the controller 3.

Implementation of a utility model. The automatic reagent dosing device is physically implemented in the following configuration:

- flowmeter 2 - MTKI-32 type water meter with a pulse output signal;

- controller 3 - controller "Dozafon" manufactured by LLC "RKS-Energo" (Fig. 4);

- metering pump 4 - membrane metering pump type DLX-MA / AD;

- electrochemical sensor 5 - potentiometric PH-electrode type ESK-1.

A brief description of the drawings. In FIG. 1 shows a diagram of a prototype device. In FIG. 2 shows a block diagram of the proposed reagent dispensing device, where 1 is a pipeline, 2 is a flow meter, 3 is a controller, 4 is a metering pump, 5 is an electrochemical sensor.

The proposed device for dosing reagents allows to reduce the consumption of reagents by increasing the accuracy of dosing, to exclude the possibility of excessive or insufficient dosing of reagents when changing the properties of the treated water, to exclude the possibility of exceeding the maximum permissible concentration of dosed reagents in excess of the norms established in SanPiN.

Claims (1)

A device for dispensing a reagent into a pipeline, consisting of a flow meter installed on the pipeline that is electrically connected to the controller, a metering pump equipped with inlet and outlet hoses, which doses the reagent into a pipeline that is electrically connected to the controller, characterized in that it is installed on the pipeline after the reagent entry point an electrochemical sensor electrically connected to the controller.

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