SU1736951A1 - Device for gas treatment of sewage - Google Patents

Abstract

SUMMARY OF THE INVENTION: The device comprises a horizontal sealed enclosure divided into sections by vertical alternately adjacent on the bottom and overlapping partitions. The initial sections are equipped with heaters at the bottom. The device also contains aerators connected by a pipeline with a recirculation pump, and the pipeline is equipped with a refrigerator. 1 il.

Description

This invention relates to a wastewater treatment technique and can be used, for example, in treating water with ozone.

A device for introducing gas into a liquid is known, comprising a sealed enclosure provided with transverse partitions forming the compartments in which mechanical hangers are located. The liquid is in contact with the gas in countercurrent. The known device allows treating water with large doses of gas, however, the structure is complicated and unreliable in operation due to the use of mechanical agitators. In addition, chemical reactions between liquid and gas do not have optimal conditions. There are large unproductive gas losses.

Closest to the present invention is a device comprising a sealed housing with transverse partitions, aerating devices in the form of inclined set nozzles connected by a pipeline to a pump for forcing circulation of the treated water.

However, the device has the disadvantage that it does not create optimal conditions for the chemical reaction between the liquid and the gas.

The purpose of the invention is to reduce the duration of the process1 of wastewater treatment and reduce its cost.

This goal is achieved by the fact that the known device is equipped with a heater located in the lower part of the section and a cooler in the pipeline for cooling the recirculation liquid. An increase in the temperature of the reacting medium accelerates the chemical interaction between the liquid and the gas, and a decrease in the temperature of the liquid increases the dissolution of the gas in it, all other conditions being equal. As a result, the effect of wastewater treatment increases.

The drawing shows the proposed device for the treatment of wastewater gas.

The device contains a horizontal sealed housing 1. divided by vertical transverse alternately h

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kayit to the bottom and overlapping partitions 2 on the section. Nozzles 3, connected by a pipeline with a recirculation pump 4, are obliquely mounted between the partitions adjacent to the overlap. The nozzles are equipped with nodes 5 for adjusting the angle of incidence of the jet and can rotate in a vertical plane parallel to the longitudinal axis of the housing. In the partitions attached to the ceiling, below the water level there are overflow openings 6. The nozzles 7 and 8 serve for the supply and discharge of water. Through the bubbler 9, the gas is fed into the reactor, through the nozzle 10 is withdrawn from it. To reduce the duration of the process, the initial sections are provided with heaters 11 located in their lower part, and the pipeline for cooling the recirculation fluid is equipped with a cooler 12 located in the pool 13 for the source water having a natural low temperature before processing.

-The device works as follows.

The treated water is supplied to the housing 1 through the nozzle 7 and the pool 13. The pump 4 takes the treated water from the last unheated section of the housing and, under pressure of several atmospheres, pumps it through the pipeline through the nozzles 3 back into the housing. In this case, the recirculated water, the passage through the cooler 12, is cooled. The cooled jets leaving the nozzle capture the gas, disperse and vigorously mix them with the liquid heated by means of the heaters 1. The gas introduced through the sparger 9 and released above the surface of cold water dissolves easily in it and mixes with the underlying heated water layers. Due to the higher temperature, the solubility of the gas decreases. It is more actively released in the volume of the treated liquid and reacts more fully with it, but already in the heated zone. Depending on the quality of the water being treated, by changing the angle of inclination of the nozzle into the reaction zone, all or part of the gas above the water can be supplied. Due to the fact that the jet necessarily passes in the water column under the partitions adjacent to the ceiling, the trapped gas bubbles are released in the adjacent section behind the partition. The gas that is not trapped by the jet leaving the nozzle, due to the occurrence in the section

overpressure through the bypass holes b enters the adjacent section. Here, the gas is re-entrained in the cooled streams and re-contacts the heated water. In the last in the course of the gas

the nozzle section is adjusted so that it captures the entire amount of gas supplied to the device, and the septum has no bypass holes. As a result, the gas, without coming into contact with the treated water,

does not enter the exhaust gas port.

The water entering the chamber moves towards the gas. The flow rate and pressure of the recirculation fluid depends on the amount

the gas required for the chemical reaction between the gas and the water pollution, and the required contact time.

Due to the acceleration and completeness of the use of expensive gas, its consumption and noiepn are reduced by an amount that is much more expensive than the cost of a heater and a refrigerator. The calculation of the economic effect can be performed according to the data of the operating installation as compared with the prototype both during operation and during manufacture.

Claims (1)

Invention Formula A device for treating wastewater with gas, including a horizontal sealed enclosure, divided by vertical transverse, alternately adjacent to the bottom and overlapping partitions into sections, and aerators, installed with the possibility of rotation in a vertical plane parallel to the longitudinal axis of the enclosure, and connected by pipeline with recirculation pump, characterized in that, in order to reduce the duration of the process and reduce its cost, the initial sections are provided with heaters located in their lower part, and pipes Wire - a refrigerator for cooling the recirculation fluids. I 1SM--, i five