Telescoping venturi siphoning blowdown pipe and design method

Abstract

The invention discloses a telescoping venturi siphoning blowdown pipe and a design method. The telescoping venturi siphoning blowdown pipe is characterized by comprising a siphon, an air communicating valve, a jet pipe and a water supplement valve, wherein the water inlet end and a drain outlet of the siphon are immersed below the water level of a water collecting tank and the water level of blowdown well, the highest point portion of the siphon is connected with the air communicating valve in a sealed mode, and a reducing section is arranged at the top of the drain outlet; a reducing head is arranged at one end of the jet pipe, the reducing head and the jet pipe are fixedly connected into a whole, the other end of the jet pipe is connected with a first circulating water return pipe in a sealed mode through the water supplement valve, and the jet pipe extends into the siphon. The design method comprises the following steps of calculating the flow velocity of circulating water return branch pipes, calculating the flow velocity of the jet pipe, calculating the pressure head converted from the flow velocity of the reducing section of the jet pipe, calculating the flow velocity of the siphon, and calculating the maximum allowable superelevation of the siphon. The telescoping venturi siphoning blowdown pipe and the design method have the advantages that the structure is simple, the cost is low, opening and closing are convenient, control is easy, the effect is remarkable, and the telescoping venturi siphoning blowdown pipe and the design method can be applicable to the occasion that sewage on the water surface needs to be discharged, and the requirements that the water outlet end and the drain outlet are immersed below the water level, and a supplement water source needed by the jet pipe is arranged are met.

Description

technical field [0001] The invention relates to chemical equipment, and relates to a sleeve-type Venturi siphon sewage discharge pipe and a design method for discharging sewage on the water surface of a sump. Background technique [0002] After the sterilization and stripping of the circulating water system, a layer of slime floats on the water surface of the sump. If this part of the slime is not discharged and replaced in time, it will return to the circulating water system, which reduces the sterilization effect. The usual circulating water discharge points are all in the collection The bottom of the pool, therefore, to replace this part of the dirt, a large amount of clear water must be drained, resulting in a waste of water. [0003] There are four types of circulating water sterilization blowdown in the prior art: [0004] 1. Add an overflow pipe in the sump to discharge the sewage separately at the bottom of the sump without adding a valve. The existing problems are...

AI Technical Summary

Problems solved by technology

The existing problems are: 1) The overflow pipe installed separately in the sump can only be installed during construction inside the sump, and cannot be modified during the operation of the circulating water system; 2) Since there is no valve, the water level in the sump is high It will automatically drain when it is at the overflow port, and it is difficult to control the drainage time;

The existing problems are 1), the overflow pipe installed in the sump can only be set during construction inside the sump, and cannot be modified during the operation of the circulating water system; 2), because the original sewage pipe valve is at the bottom of the sump and The diameter of the pipe is large, and the opening and closing of the valve is troublesome;

The existing problems are: 1) It is difficult to transform, and it needs to be constructed on the cement pool wall, thereby destroying the original structure and anti-corrosion of the pool wall; 2) Since there is no valve, when the water level of the sump is higher than the overflow port, it will automatically drain water. Difficult to control drainage time;

The existing problems are: 1) It is difficult to transform, and it needs to be constructed on the cement pool wall, thereby destroying the original structure and anti-corrosion of the pool wall; 2) It is troublesome to switch the valve with a large valve diameter;

The existing problems are: 1) After the sterilization and stripping, the foam cannot be discharged in time, and the manual cleaning is intensive. If the manual cleaning is not timely, it will lead to fluctuations in water quality; 2) After the sterilization and stripping, the sewage discharge time is long, and the drainage volume is large, which wastes water replenishment

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