SU49329A1 - Apparatus for dispensing reagents into a pipeline with a fluid flowing under pressure - Google Patents

Description

The invention relates to an apparatus for metering the supply of reagents into a pipeline with a fluid flowing under pressure, provided with a metering tank with overflow and air tubes for carrying out a hydraulic valve.

To achieve a constant dosing under pressure equal to the pressure in the pipeline, in the proposed apparatus a plate placed in a closed tank with two compartments connected to reactive and compensatory tanks was used, one compartment communicating with the suction side of the pitot tube and the other with supporting part part.

In the schematic drawing of FIG. 1 shows a longitudinal section of the apparatus and FIG. 2 is a section along the line PP of FIG. 1. The apparatus consists of two tanks L and 5. In the tank L there is a plate C with two compartments /// and / V, which, through the pipes / and //, communicate with the pipeline / C, in which the end of the pipe / faces upstream fluid, and the end of the pipe // - downstream. The upper reservoir B is divided by a partition D into two tanks: K-compensatory and V7-reactive, equipped with water-indicating glass. In pipeline K, a pressurized fluid flows to which the dosed reagent is to be added.

At the beginning of the charging, the valves 7, 2 and 5 are closed, the rest, 5, 6, 7, 10 are open and, therefore, in tanks A B the air is under atmospheric pressure. The valves 4 and 7 are then closed and the valve J is opened to fill the tank V7 with the necessary amount of reagent. The air in tank A and tank V becomes somewhat compressed to a certain pressure greater than atmospheric, but not greater than the pressure in the pipeline supplying the reagent. After that, close valve J and, opening valve 5, let in liquid from. pipeline to tank V; as the tank V is filled with this fluid, the air displaced by it passes through the air tube 9 into reservoir A; when the liquid reaches the top of this tube, the eye begins to pour over it into the compartment /// of the C plate from it into the tube /. After filling the latter, part of the liquid will spill over the edge of the tray to the bottom of tank L and rise to a certain level L. Finally, close valve 5 and open valve 7. Reagent from tank V / begins to flow into compartment IV of Siv plate Siv tube II. Air from tank A will pass through air tube 8 to tank V7 until the level of reagent in compartment IV rises to the lower end of the air tube and a hydraulic shutter is obtained. After that, for the operation of the apparatus, it is necessary to open valves b, 7 and 2. Since the lower ends of the tubes I and L are bent at an angle of 90 ° and installed in the pipeline K one on the support, another on the suction, a pressure differential is created, under the action of which reagent enters the pipeline. Due to the support in the tube / the liquid from the compartment /// of the plate C will overflow over the edges to the bottom of the tank A and thereby increase the air pressure in it. In the tube // due to suction, a vacuum is obtained and the level of the reactant in compartment IV decreases, but as soon as the lower end of the air tube 8 is opened, air passes through it immediately from tank A to tank VI. At this time, the reagent from the tank VI is poured into the compartment / V until a hydraulic lock is again obtained, etc.

A slight fluctuation of the level of the reagent in the IV compartment (in the range of 1 millimeter) will occur all the time while in the pipeline K there is a liquid flow; in the absence of the latter, the apparatus automatically stops and the inlet of the reagent into the pipeline stops.

In the event of a decrease in pressure in the pipeline, the air in reservoir A expands and lowers the level in the compartment ///, resulting in the lower end of the air tube 9 opening, through which air from reservoir A passes into tank V, and the liquid is poured into compartment HI. Consequently, with a decrease in pressure, the liquid from the tank V is bypassed into the pipeline, freeing up a volume for air, as a result of which

its pressure drops to a new equilibrium.

With increasing pressure in the pipeline, imbalance is restored through the tube I, the cross section of which is much larger than the cross section of the tube.

To periodically charge the apparatus, it is necessary to drain the remaining liquid from tank V and tank A into the drain, opening valves 4 and 10 for this, and in order to deal all the time with the same air volume, leave a small amount tube / i, tank A so that there is no air communication between the cavity of tank A and atmospheric air.

The subject matter of the invention.

An apparatus for dispensing reagents into a pipeline with a fluid flowing under pressure, equipped with a metering tank with overflow and air tubes for the implementation of a hydraulic shutter, characterized in that plate C is placed in a dosing under pressure equal to the pressure in the pipeline with two compartments, of which compartment IV, connected to the jet tank VI, communicates with the suction piece through the said device with a hydraulic shutter Pitot cuttings or orifice, and the other /// connected in the same manner with compensatory tank V, filled with liquid from the pipeline, are connected to the retaining portion.

RIG 1

srig 2