RU120745U1 - NETWORK DYE DOSING DEVICE - Google Patents

Abstract

A dye dosing device for network water, consisting of a flow meter installed on the pipeline, electrically connected to the controller, a dosing pump that dispenses the dye into the pipeline, electrically connected to the controller, a pressure sensor installed on the pipeline, electrically connected to the controller, characterized in that in a container with a dosed dye solution, a dye solution stabilization unit is installed, which is electrically connected to the controller.

Description

The utility model relates to the field of dosing dyes and other reagents into pipelines in heat engineering and hydraulic systems (steam and hot water boilers, boilers, heating networks, technological installations). The use of network water dyes can reduce the magnitude of leaks and thefts of network (heating) water without violating the operating mode of the equipment. These tasks are accomplished by introducing small amounts of special dyes, for example, “uranin A” (fluorescein), into water used to supply heat engineering or technological devices. For the treatment of water in heating and technological systems of various types, various dyes are used, which are allowed by sanitary norms and rules in certain doses.

A device for dispensing a reagent into a pipeline is known (see S. Cherkasov "Dosing pumps: types, selection, installation" // Journal "Plumbing. Heating. Air conditioning", 2006 - No. 1), consisting (figure 1) of the installed on the pipeline 1 of the flow meter 2, electrically connected to the controller 3, the metering pump 4, dosing the reagent into the pipeline 1. The controller receives a signal from the flow meter and calculates the cumulative volume of 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 on-time of the metering pump is determined by dividing the calculated dose of the reagent by the performance of the metering pump at a given pressure value.

The disadvantage of this device is that the calculated dose of the reagent is calculated on the assumption that the pressure in the pipeline is stable over time. In practice, the pressure in the pipelines of the heat supply systems changes during the day (month, year). The performance of the metering pump significantly depends on the pressure in the pipeline into which metering is performed, which can lead to both insufficient and excessive metering relative to the estimated dose of the reagent. With excessive dosing of the reagent, it is possible to exceed its maximum permissible concentration (MPC) in the treated water, normalized by sanitary rules and norms (see SanPiN 4723-88 "Sanitary rules for the design and operation of centralized hot water systems").

The closest in technical essence and the achieved results to the proposed device is a device for dispensing a reagent into a pipeline (see patent 89661, CL F17D 3/12, "Device for dispensing a reagent"), consisting of a flowmeter installed on the pipeline, electrically connected to the controller, a pump a dispenser dosing the reagent into the pipeline, electrically connected to the controller, a pressure sensor 5 mounted on the pipeline, electrically connected to the controller (figure 2).

The disadvantage of this device is that it does not provide a stabilization system for the dosed solution. The absence of such a stabilization system leads to the fact that the dosed reagent solution stratifies over time, or dissolved reagent particles settle to the bottom of the reagent tank, which can cause a mismatch in the concentration of the reagent in the treated water with a predetermined value, or failure of the dosing pump.

The purpose of the proposed network dye dye dispensing device is to enable accurate dosing of the dye (reagent), eliminating the possibility of the metering pump operating in the mode of dosing the bottom sediment of the dye in the tank, which can lead to failure of this pump, to a mismatch of the dye dye concentration to a predetermined value.

Disclosure of a utility model. To achieve this goal, a dye solution stabilization unit (for example, a propeller mixer), electrically connected to the controller, is installed in a container with a dye (Fig. 3).

The turn-on time of the metering pump is calculated in the following sequence: - determine the volume of treated water that has passed through the flow meter in a predetermined time recorded in the controller's memory; - determine the volume of injected dye in proportion to the volume of treated water according to a pre-calculated dosing coefficient of the dye recorded in the controller memory; - measure the pressure in the pipeline; - determine the performance of the metering pump recorded in the controller memory, the performance of the metering pump at this pressure; - determine the start-up time of the metering pump by dividing the calculated volume of injected dye by the performance of the metering pump at the measured pressure.

If there is no signal from the flow meter (no water flow in the pipeline) for a predetermined time recorded in the controller’s memory, the dye solution stabilization unit is automatically turned off by the controller’s signal. When a signal from a flow meter appears, indicating the appearance of a flow in the pipeline, the dye solution stabilization unit is automatically turned on by a controller signal. This ensures the uniformity of the dye solution in the tank (absence of separation and sediment), the stability of the dye solution concentration in the tank and in the treated water, protection of the metering pump against operation on the bottom sediment of the dye, reduction of the energy consumption consumed by the dye solution stabilization unit (for example, propeller mixer), increasing its service life.

Implementation of a utility model. The network water dye dosing device is implemented in the following configuration:

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

- controller 3 - controller "dose" (figure 4);

- pressure sensor 5 - overpressure sensor type DMP 330M;

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

- solution stabilization unit 6 - propeller mixer MP-1 × 250 / L-1000.

A brief description of the drawings. Figure 1 presents a diagram of an analog device. Figure 2 presents a diagram of a prototype device. Figure 3 presents a block diagram of the proposed device for dispensing a dye of network water, where 1 is a pipeline, 2 is a flow meter, 3 is a controller, 4 is a metering pump, 5 is a pressure sensor; 6 - capacity (tank) with a dye solution; 7 - block stabilization of the dye solution. Figure 4 presents a photograph of a controller designed to implement a utility model.

The proposed dye dispensing device for network water allows one to ensure the accuracy of maintaining a given dye concentration in the treated water by ensuring uniformity of the dye solution in the tank, to increase the reliability of the dosing system, protect the dosing system pump from emergency conditions (work on bottom sediment), and reduce the energy consumption of the dye dosing system .

Claims (1)

A metering device for dyeing network water, consisting of a flow meter installed on the pipeline that is electrically connected to the controller, a metering pump that doses the dye to the pipeline, electrically connected to the controller, a pressure sensor installed on the pipeline, which is electrically connected to the controller, characterized in that a container with a dye dye solution is installed dye solution stabilization unit, electrically connected to the controller.