SU932247A1 - Device for automatic batching of coagulant solution - Google Patents

Description

I

The invention relates to automatic devices for dispensing a coagulant solution upon clarification of water.

A device for automatic metering of reagents is known, which acts depending on the difference in the electric conductivity of water before and after the introduction of the reagent into it. The siphon dispenser used in coagulation plants is the closest to the technical essence.

A disadvantage of the known siphon dispenser is the low accuracy of operation, which does not allow maintaining the specified ratio of coagulant consumption and consumption of treated water.

The purpose of the invention is to improve the accuracy of maintaining a given coagulant consumption ratio and water consumption.

The goal is achieved by having two communicating sealed tanks with hydraulic locks installed on the pipeline connecting the coagulum tank and the coagulum canister, and one of the canals is connected to the coagulum canister by the pipeline and the second one to the water dispenser.

Fig. 1 shows a schematic of the device for the automatic dosing of coagulant; in fig. 2 - section A-A in fi 1.

The device contains a coagulum solution supply line and a water supply line.

Claims (2)

The coagulum solution supply line includes a coagulum tank 1, a pump 2, a pipeline 3, on which two communicating sealed tanks J and 5 are installed with hydraulic locks 6 jQ and 7 and drain pipes 8 and 9 connecting tanks 4 and 5 with a container 1 coagulant and supply tank 10 coagulant with a calibrated orifice 11. The water supply line includes a water distributor 12, a shutoff tank 13, a consumable water tank 1 with a calibrated orifice 15. The pneumatic air line 1.6 connects the coagulum solution supply line to the water supply line, while the air duct 17 is lowered into the coagulum canister 10 and connects it to the hermetically sealed coagulum supply tank 5, and the air duct 18 is lowered into the water supply tank It for water and connects it to the coagulum return tank K, hermetically closed, connected through a hydraulic seal 6 and drain tube 8 with a coagulum capacity 1 NTA. The air duct 16 at the junction is equipped with calibration washers 19. The holes of the calibration washers 19 are incommensurable with the internal diameter of the air ducts 17 and 18, i.e. they are smaller, so air consumption is negligible. The hydraulic resistances of the air ducts 16 and 17, for an insignificant air flow, are almost equal to the coolant. The pressure in the pneumatic system (air duct 17. tank 5) is equal to the height hj of the liquid column in the supply tank 10 coagulant. The pressure in the pneumatic system (air duct 18, tank 4) is equal to the height h, of the liquid column in the supply tank I of water. Air ducts 17 and 18 are set to be the same from the bottom of the tanks 10 and the distances that are chosen to be minimal. The device works as follows. The coagulant from tank 1 is pumped through pipe 3 to tank k and 5 from tank 1. From tank 4, coagulum through hydraulic lock 6 and drain pipe 8 flows back into container 1. From tank 5 through hydraulic lock 7 and drain pipe 9, the coagulum enters Coagulum fuel tank 10, from where through the calibration hole 11 into the clarifier. Water from the water distributor 12 through the cut-off tank 13 enters the supply tank, from where it goes through the calibration hole 15 to the clarifier. The amount of incoming water is regulated depending on the quality of the source water and the strength of the coagulum by the position of the shut-off tank. The percentage ratio of coagulant and water is set by the calibration holes 11 and 15- With an increase in the flow of water into the discharge tank I, the level increases, the pressure in the air duct 18 and the tank 4 is increased by increasing the liquid column. Increasing the pressure in the tank k leads to the redistribution of the incoming coagulum, the flow of which in the tank 5 will increase and through the hydraulic lock 7 it will flow into the tank 10 coagulant nta. When leveling coagulant and water levels in tanks 10 and k. pressure in the pneumatic system is equalized. When water intake decreases, its level in the tank k decreases, the pressure in the air duct 18 and the tank 5 drops, and the pressure in the air duct 17 and the tank 5 remain the same, i.e. exceeds the pressure in the tank 4. The redistribution of the coagulant coagulant solution occurs. In the tank 4 it will start noctynaTb more and through the hydraulic lock 6 and through the drain tube 8 it will flow into the tank 1. When the process stabilizes, the levels in the tanks 10 and 14 and the hydraulic locks 6 and 7 will be equal to h; j h2. Thus, without any regulating devices, the levels in tanks 10 and 14 () and the constant ratio between water consumption in the clarifier and coagulum consumption are maintained automatically. Apparatus of the Invention A device for automatically dispensing a coagulant solution containing a coagulum supply line, including a coagulum tank, a pump and a coagulum supply tank, and a water supply line including a water distributor, a cut-off tank and a water discharge tank connected by pipelines, In order to increase the accuracy of maintaining a given coagulant flow ratio and water flow, two communicating grids are installed on the pipeline connecting the coagulum tank and the coagulum flow tank. -particle tank with water trap, wherein one of Bache, Kow communicates with feed conduit coagulant tank and the second tank with the water flow. Sources of information taken into account in the examination. Copyright svededelst.vo USSR № 95156. kl. In 01 J, 1951. 2. Gurvich S.M. Water treatment. 5 L., Gosenergoizdat, 1961, p. 122125 (prototype).