Heat exchanger with single working medium for ordinary pressure

A technology of atmospheric pressure gas and heat exchangers, which is applied to the types of heat exchangers, indirect heat exchangers, lighting and heating equipment, etc., and can solve the problems of large metal consumption and bulky structures

Inactive Publication Date: 2006-06-14
张天飚 +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, its structure is bulky and consumes a lot of metal

Method used

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  • Heat exchanger with single working medium for ordinary pressure
  • Heat exchanger with single working medium for ordinary pressure

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Embodiment Construction

[0008] According to the operating pressure of pulverized coal gasification, it is divided into two types: normal pressure and normal pressure. This single working medium heat exchanger is the key equipment for waste heat recovery of atmospheric pulverized coal gasification and can be used as steam superheater and feed water preheater.

[0009] like figure 1 As shown, high-temperature gas enters the gas channel and scours the tube bundle formed by stacked coils in the gas channel. When washing the outside of the coil tubes, a process of convection and radiation heat release occurs, releasing heat and reducing the temperature; working medium- -Steam or water first enters the lower annular header, and is distributed from the lower annular header to the coils placed horizontally. When the working medium flows in the coil tube, it absorbs the heat transferred from the gas. After the temperature rises, Gather into the upper annular header and lead out through the outlet pipe. The ...

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Abstract

The invention discloses monomial working medium heat exchanger used in normal pressure coal. Compared with shell-and-tube heat exchanger, the invention increases heat transfer efficiency and reduces metal consumption; there is no need big size forged piece. Plain carbon steel can be adopted according to low tube temperature. This can reduce equipment cost. The running safety factor is high. The invention is tube structure with insulating layer. The tube cavity is formed coal gas flow passage. The insulating layer is formed between inner sleeve and tube. The tube up-down two ends are respectively up interface and down interface. Its features are that the up and down interfaces are respectively set up and down annular header tanks; they are respectively set working medium outlet and inlet; the center of the tube is set center tube with sealed up end; annular coil pipe is set between the center tube and inner sleeve; each annular coil pipe is interlinked with the up-down annular header tank to form working medium flow passage; the outer wall of the tube is set bearer.

Description

Technical field: [0001] The invention relates to waste heat recovery equipment equipped with pulverized coal gasification method. technical background: [0002] At present, my country's chemical plants using coal as raw material are undergoing the transformation of gas production methods, from the original fixed bed method to pulverized coal gasification (fluidized bed) method. The temperature of the gas produced by pulverized coal gasification is very high, mostly over 1000□, while the temperature of the gas entering the process only needs to be around 200□. In order to cool down the gas and also utilize the heat released during the cooling process, the pulverized coal gasification method needs to be equipped with waste heat recovery equipment. [0003] The traditional heat exchanger currently used in the chemical industry is basically a shell-and-tube type. Due to the characteristics of the fire tube structure and gas longitudinal erosion, the heat transfer efficiency is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D1/047
Inventor 张天飚毛少祥鲁雪峰
Owner 张天飚
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