SU505888A1 - Reagent Dosing Method - Google Patents

Description

one

The invention relates to dispensing devices for liquids and can be used in the chemical and other industrial fields for dispensing a reagent, such as coagulant, for the purpose of

water purification in waterworks.

There is a known method of dispensing a reagent by mixing streams of a concentrated reagent solution and a solvent coming in with a variable flow rate.

The disadvantages of the known method are the unreliability and inaccuracy of the dosage of the reagent due to the variable performance of the supercharger, as well as the impossibility of automatically controlling the variable solvent flow depending on the density of the mixture.

The aim of the invention is to stabilize the dose of the reagent.

The goal is achieved by pumping the mixture with a constant capacity, and mixing is carried out before entering the supercharger, and

variable solvent consumption is automatically adjusted depending on the density of the mixture, controlled at the outlet of the blower.

The drawing schematically shows a device that implements the proposed method.

From the tank 1, a highly concentrated reagent solution through the suction pipe 2 enters the pump 3, which has a constant capacity. To the suction pipe is attached to the pipe 4 for the supply of water - solvent reagent. A flow regulator 5 is installed on line 4. To control the quality of the solution supplied by the pump, a pressure line 8 is connected to the pressure line 6 connected to the mixer 7, from which the solution flows freely at a certain height. To pulse tube 8, connect a differential pressure gauge 9 at a distance H below the outflow.

A pump with a constant capacity (a solution of high concentration flows. The calculated content of reagent S in the pumped solution, which is necessary for treating the main water flow and equal to S -, is provided by mixing water supplied to the pump suction inlet to the solution. The amount of mixed water is controlled depending on the density of the solution supplied by the pump, corresponding to the calculated content of the reagent S in it.

The pressure P measured by the differential pressure meter at a constant height of the column H depends only on the density of the solution P and is equal. Therefore, the content of the reagent in the feed solution is controlled according to a given pressure P.

Depending on the deviation of the actual pressure from the setpoint, the flow rate of the mixed water — solvent is corrected by varying the degree of opening of the regulator 5.

Claims (1)

Invention Formula The method of dosing the reagent by mixing the streams of the concentrated reagent solution and the solvent coming in with a variable flow rate, characterized in that, in order to stabilize the dose of the reagent, the mixture is pumped at a constant capacity, and the mixing is performed before entering the supercharger, the pier is a variable flow rate of one of the mixed streams, for example solvent, are automatically controlled depending on the density of the mixture, controlled at the outlet of the blower.