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Pneumatic gas heating device and gas heating method

A gas heating device, a pneumatic technology, which is applied to the heating device and the generation of other non-combustion heat, etc., can solve the problems such as none, and achieve the effects of uniform heating, fast heating speed and simple structure.

Inactive Publication Date: 2008-11-12
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Pneumatic gas heating device and gas heating method
  • Pneumatic gas heating device and gas heating method
  • Pneumatic gas heating device and gas heating method

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing and embodiment the present invention will be described in further detail:

[0018] Such as figure 1 , figure 2 As shown, a pneumatic gas heating device includes a pipe 7 that is sealed and connected to each other by two straight pipes. The inner wall of the pipe is provided with a heat insulating layer 8, and a support member 5 is provided at the joint of the two straight pipes to connect a pipe 7 The nozzle 6 at the center of the inner section forms an annular channel 10 that tapers in the positive direction and expands in the opposite direction between the nozzle and the pipeline insulation layer 8; the nozzle 6 is provided with a variable cross-section air flow channel 9 . The sealing connection of the two sections of straight pipes adopts connecting flanges 1 and 4, connecting bolts 2 and sealing washers 3. The structure of the supporting member 5 is a flange with ribs divided into three equal parts in the radial dir...

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Abstract

The invention discloses a pneumatic type gas heating device and a gas heating method. The heating device comprises a pipe which is connected by two sections of straight pipes in a manner of sealing; the inner wall of the pipe is provided with a thermal insulation layer and the joint part of the two sections of the straight pipes is provided with a support component which is connected with a nozzle arranged in the center of the inner cross section of the pipe; an annular channel shrinking along the forward direction gradually and expanding along the negative direction gradually is formed between the nozzle and the thermal insulation layer; the nozzle is internally provided with a cross section changeable flow channel. High speed compressed gas is sent from one end of the pipe at subsonic speed and divided into two strands when going through the nozzle; the middle strand enters the cross section changeable flow channel of the nozzle and the surrounding strand enters the annular channel shrinking along the forward direction gradually between the nozzle and the thermal insulation layer and speed difference of the two strands of flow is generated at the joint surface at the end of the nozzle; shear friction and disturbance take place and gas is heated and the heated gas flows out from the other end of the pipe. The gas heating device has the advantages of simple structure, low production cost, even heating, fast temperature rise, saving energy, being high efficient, clean and sanitary, etc.

Description

technical field [0001] The invention relates to a pneumatic gas heating device and a gas heating method. Background technique [0002] High-temperature gas is widely used in industrial sites such as metallurgy and steelmaking industries. Conventional gas heating (such as gas, electric heating, etc.) uses heat conduction, convection, and heat radiation to first transfer heat to the gas near the surface of the heating element, and then gradually raise the overall temperature of the gas through convective heat exchange. To make the gas as a whole reach the required temperature, a certain heat transfer time is required. When heating with temperature difference heating, in order to increase the heating speed, it is necessary to increase the external temperature and increase the temperature gradient, which also increases the heat loss. [0003] The high-speed gas pneumatic heating method in the inner channel is to directly convert a part of the kinetic energy and pressure energy...

Claims

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Application Information

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IPC IPC(8): F24J3/00
Inventor 高铁瑜章利特龚建英王新军牛力军孟祥兆
Owner XI AN JIAOTONG UNIV
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