Method for obtaining high-pressure steam through absorbing heat from low-pressure steam

Abstract

The invention relates to a method for obtaining high-pressure steam through absorbing heat from low-pressure steam, which is capable of improving the utilization rate of waste-heat steam and achieving an obvious energy-saving effect. A device for implementing the method is mainly composed of an expansion pipe, a heat exchanger, a diffuser pipe, a condensed water outlet, a steam pipeline, a high-pressure steam generator, a high-pressure feedwater inlet and a high-pressure steam outlet. According to the invention, the waste-heat steam enters the expansion pipe to be mixed with a part of steam coming out form the high-pressure steam generator, then flows out from the expansion pipe at a high flow speed, successively enters the heat exchanger to indirectly exchange heat with the other part of the steam coming out form the high-pressure steam generator and finally enters the diffuser pipe to be diffused and heated to obtain the high-pressure steam; the other part of the steam coming out form the high-pressure steam generator gives out heat to be turned into condensed water which is discharged; the high-pressure steam discharged from the diffuser pipe is used for heating high-pressure feedwater in the high-pressure steam generator, then is discharged from the high-pressure steam generator after being cooled and finally enters the expansion pipe and the heat exchanger respectively; and the high-pressure feedwater is discharged after being heated to the high-pressure steam by the high-temperature steam in the high-pressure steam generator.

Description

technical field [0001] The invention belongs to the technical field of heat treatment and equipment, in particular to a method for obtaining high-pressure steam by absorbing heat from low-pressure steam. Background technique [0002] In the production process of metallurgy, chemical industry, building materials and other industries, a lot of waste heat will be generated, and the use of this waste heat can save a lot of energy. At present, the best way to utilize waste heat is to produce waste heat steam, which can be used for heating, vacuum smelting, power generation, etc. However, the temperature and pressure of waste heat steam is relatively low, and its use effect is unstable and low in efficiency in vacuum smelting, power generation, etc. A large amount of waste heat just cannot be utilized and wasted in vain. Contents of the invention [0003] In order to widely use low-temperature and low-pressure waste heat steam and make full use of a large amount of waste heat ...

AI Technical Summary

Problems solved by technology

It makes it possible to convert low-pressure steam into high-pressure steam, further expands the application range, and solves the problem of low-grade heat energy utilization

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