Smoke duct device and reducing elbow thereof

A technology of variable diameter elbow and flue air duct, which is applied in exhaust gas device, combustion product treatment, combustion method, etc., can solve the problems of large resistance and uneven flow field, so as to reduce energy consumption and achieve uniform flow field. , the effect of avoiding noise

Inactive Publication Date: 2014-07-23
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, the present invention overcomes the defects of the prior art and provides a reducing elbow, which aims to solve the problems of large resistance and uneven flow field of the traditional rectangular reducing elbow

Method used

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  • Smoke duct device and reducing elbow thereof
  • Smoke duct device and reducing elbow thereof
  • Smoke duct device and reducing elbow thereof

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Experimental program
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Embodiment Construction

[0021] Embodiments of the present invention are described in detail below in conjunction with accompanying drawings:

[0022] Such as figure 1 As shown, a reducing elbow 100 includes a reducing section 110 and a main body section 120, the cross sections of the reducing section 110 and the main section 120 are circular, and the reducing section 110 includes a small end 112 and a large end 114, the diameter reducing section 110 is a curved shape whose diameter gradually increases from the small end 112 to the large end 114. The ratio of 1.0 to 3.0. The diameters of each cross-section of the main body section 120 in this embodiment are equal.

[0023] The diameter reducing elbow 100 in this embodiment is provided with a diameter reducing section 110 and a main body section 120 with a circular cross section, and the diameter reducing section 110 is a curved shape whose diameter gradually increases from the small end 112 to the large end 114, Its large end 114 communicates with ...

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Abstract

The invention discloses a reducing elbow which comprises a reducing section and a body section. The cross section of the reducing section and the cross section of the body section are circular, the reducing section comprises a large end and a small end, the diameter of the reducing section is gradually enlarged from the small end to the large end, the reducing section is curved, the large end of the reducing section is communicated with the body section, and the ratio of the curved radius of the reducing section to the diameter of the small end is 1.0-3.0. The cross section of the reducing section and the cross section of the body section are circular, the diameter of the reducing section is gradually enlarged from the small end to the large end, the reducing section is curved, the large end of the reducing section is communicated with the body section, and therefore reducing and turning are achieved synchronously, reducing has the enough diffusion section, turning has the enough turning radius, the reducing elbow is even in smoke flow field, and a smoke duct body is prevented from vibrating to generate noise. The conclusion that the resistance generated by the reducing elbow is far smaller than that generated by a traditional rectangular reducing elbow is obtained through FLUENT fluid simulation software analog computation. The invention further discloses a smoke duct device.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a flue gas duct device and a reducing elbow thereof. Background technique [0002] The reducing elbow is a common layout form of the flue gas system in thermal power plants and petrochemical plants. It can realize the flue gas duct changing and turning in a tight space. The traditional reducing elbow is based on the circular outlet of the axial flow fan. The diameter is reduced to the required rectangular section through the diameter reducing square and circle joint, and then the steering is performed through a 90° elbow, such as figure 1 As shown, this type of rectangular reducing elbow 10 has the following problems: Flow field: After simulating its velocity field with FLUENT fluid simulation software, it is found that the flow field is extremely poor, and the uneven flow field is usually caused by the vibration of the flue gas duct body and the source of noise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J13/04F23J11/00
Inventor 李伟科
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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