Concrete tubular pile still kettle residual air recovery system

Abstract

The invention relates to a concrete tubular pile still kettle residual air recovery system which comprises a still kettle, a boiler room softened water tank and a softened water collection tank. The system is characterized by further including a shell-and-tube heat exchanger, a tube pass inlet of the shell-and-tube heat exchanger is communicated with a water outflow tube of the boiler room softened water tank, a tube pass outlet of the shell-and-tube heat exchanger is communicated with the softened water collection tank, a shell pass inlet of the shell-and-tube heat exchanger is communicated with a residual steam exhausting pipe of the still kettle, and a shell pass outlet of the shell-and-tube heat exchanger is provided with a blow-down valve. Heat exchange of softened water of the boiler room softened water tank and residual steam is performed through the shell-and-tube heat exchanger, the temperature of cold softened water is increased, the energy consumption of a boiler is reduced, and the waste heat use purpose is achieved. A corrugated tube is adopted as a heat exchange tube, the heat conducting efficiency inside and outside the tube is high, and scale can be prevented and removed.

Description

technical field [0001] The invention relates to a concrete pipe pile autoclave, in particular to a concrete pipe pile autoclave residual gas recovery system. Background technique [0002] With the development of concrete technology, the technology of concrete pipe piles is becoming more and more mature. In addition to being used in industrial and civil buildings, it is also widely used in various fields such as bridges, ports, railways or water conservancy projects. [0003] During the production of prestressed concrete pipe piles, it needs to go through the processes of feeding, tensioning, centrifugation, normal temperature steaming, releasing, demoulding and high pressure steaming. During the use of the autoclave, excess steam will be generated, and if it is discharged directly, it will cause waste of effective energy. Conventional waste steam utilization usually uses heat exchange between the waste steam and the cold soft water in the soft water tank of the boiler room ...

AI Technical Summary

Problems solved by technology

[0004] The current steam utilization system uses a conventional coil heat exchanger, which has the following disadvantages: because the residual steam contains a large amount of alkaline substances, its pH value reaches 13-14, and the ordinary carbon steel heat exchanger shell is easily corroded and leaked , but the cost of using all stainless steel is very high; the heat exchanger is easy to scale, which affects the heat exchange efficiency; the pressure resistance is poor, and there is a big safety hazard

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