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Combined jet ejection type steam-water hybrid heating device

A steam-water mixing and combined jet technology, which is applied in lighting and heating equipment, direct contact heat exchangers, heat exchanger types, etc., can solve the problems of large heat exchange end difference and low thermal efficiency, and achieve the effect of improving performance

Pending Publication Date: 2018-07-10
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low thermal efficiency and large heat exchange end difference existing in the existing single-pipe ejection type steam-water mixing heater, the present invention provides a combined jet ejection type steam-water mixing heating device, which can operate at low pressure and vacuum Enhance ejection under certain conditions, enhance heat transfer, reduce end difference, and improve thermal efficiency

Method used

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  • Combined jet ejection type steam-water hybrid heating device

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 , 2 As shown, a combined jet ejection type steam-water mixing heating device includes a scaling arc mixing chamber 1 , a diffuser chamber 2 , a steam-water mixing strengthening chamber 3 , a plurality of condensed water introduction inlets 4 and at least two steam inlets 5 .

[0019] One end surface of the scaling arc-shaped mixing chamber 1 is coaxially connected with one end surface of the steam-water mixing strengthening chamber 3; the other end surface of the steam-water mixing strengthening chamber 3 is coaxially connected with the diffuser chamber 2; a plurality of condensed water introduction inlets 4 are connected with The other end face of the scaling arc mixing chamber 1 is connected and distributed symmetrically; the pipe wall of the throat of the scaling arc mixing chamber 1 is connected with at le...

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PUM

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Abstract

The invention discloses a combined jet ejection type steam-water hybrid heating device suitable for a low-pressure working condition. The device comprises a zooming arc-shaped mixing chamber, a diffusion chamber, a steam-water mixing reinforcement chamber, a plurality of condensed water ejection type inlets and at least two steam inlets, wherein one end face of the zooming arc-shaped mixing chamber is connected with one end face of the steam-water mixing reinforcement chamber in a coaxial way, and the other end face of the steam-water mixing reinforcement chamber is connected with the diffusion chamber in a coaxial way; the plurality of condensed water ejection type inlets are connected with the other end face of the zooming arc-shaped mixing chamber; the pipe wall of the throat part of the zooming arc-shaped mixing chamber is connected with the at least two steam inlets. The ratio of the end face diameter to the tube length of the zooming arc-shaped mixing chamber is equal to 0.2-0.5;the ratio of the total cross-sectional area of the plurality of condensed water ejection type inlets to the cross-sectional area of a throat pipe of the steam-water mixing reinforcement chamber is equal to 0.008-0.02; the ratio of the total cross-sectional area of the plurality of condensed water ejection type inlets to the total cross-sectional area of the steam inlets is equal to 0.03-0.07; theratio of the cross-sectional area of the throat part of the steam-water mixing reinforcement chamber to the cross-sectional area of an outlet of the diffusion chamber is equal to 2-5; the ratio of the diameter of the throat part to the diameter of the end face of the zooming arc-shaped mixing chamber is equal to 0.50-0.99.

Description

technical field [0001] The invention relates to a structural design of a combined jet injection type steam-water mixing heating device suitable for low-pressure working conditions, which is used in the fields of steam-water surface heat exchange technology, especially the surface heat exchange technology and device in a vacuum state. Background technique [0002] Heat exchanger is a device that can realize heat exchange. It is widely used in chemical industry, medicine, thermal power generation and other industries, and plays an important role in thermal power units. [0003] The low-pressure heater in the thermal power unit is a heat exchanger. The low-pressure heater exchanges heat between the condensed water of the unit and the steam that has done work in the steam turbine, and increases the temperature of the feed water to improve the cycle efficiency of the thermal system. At present, the low-pressure heating systems of thermal power plants at home and abroad mainly use...

Claims

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Application Information

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IPC IPC(8): F28C3/08
CPCF28C3/08
Inventor 陈红旭孙瑞华费琳翔罗靖冉景煜方瑞明
Owner CHONGQING UNIV
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