Alpha-shaped material returning valve

A return valve and spiral tube technology, applied in the field of α-type return valve, can solve the problems of dead zone, material adhesion, small resistance, etc., and achieve the effect of convenient operation and simple structure

Inactive Publication Date: 2012-01-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the L valve is simple, but the resistance is too small. During the operation, it is easy for the material to flow back from the furnace to the cyclone separator through the L valve.
U valve solves the problem of anti-channeling very well, and can control the circulation volume, but in actual operation, it is found that there will be a fluidized "dead zone" in the valve body, which is easy to cause material sticking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] An α-type return valve includes a spiral pipe, a side air supply pipe, a return riser flange and an inclined pipe flange. The spiral pipe is α-shaped, one end is connected to the vertical standpipe through the flange of the return riser pipe, and the other end is connected to the return inclined pipe through the inclined pipe flange. The included angle is set, the angle between the return inclined pipe and the horizontal direction is 40°, the rotation angle of the spiral pipe is made 310°, the bottom of the spiral pipe is provided with a side air supply pipe, and the axis of the side air supply pipe is tangent to the spiral pipe The centerline, side air ducts are parallel to the horizontal direction. Due to the low viscosity of the material flowing through the spiral tube, the diameter of the selected spiral tube is small, and the circulation volume of the material does not need to be too large. The length ratio of the diameter of the spiral tube to the radius of curvat...

Embodiment 2

[0020] Such as Figure 1-2 As shown, an α-type return valve includes a spiral pipe 1 , a side air supply pipe 2 , a return standpipe flange 3 and an inclined pipe flange 4 . The helical pipe 1 is α-shaped, one end is connected to the vertical standpipe through the return riser flange 3, and the other end is connected to the return inclined pipe through the inclined pipe flange 4. The rotation angle of the spiral pipe is according to the return inclined pipe and the vertical pipe. The angle in the horizontal direction is set, the angle between the inclined return pipe and the horizontal direction is 45°, the rotation angle of the spiral pipe 1 is made 320°, and the bottom of the spiral pipe 1 is provided with a side air supply pipe 2 and a side air supply pipe 2 The axis is tangent to the center line of the spiral tube 1, and the side air supply tube 2 is parallel to the horizontal direction. Due to the low viscosity of the material flowing through the spiral tube, the diamete...

Embodiment 3

[0023] An α-type return valve includes a spiral pipe, a side air supply pipe, a return riser flange and an inclined pipe flange. The spiral pipe is α-shaped, one end is connected to the vertical standpipe through the flange of the return riser pipe, and the other end is connected to the return inclined pipe through the inclined pipe flange. The included angle is set, the angle between the return inclined pipe and the horizontal direction is 60°, the rotation angle of the spiral pipe is made 330°, the bottom of the spiral pipe is provided with a side air supply pipe, and the axis of the side air supply pipe is tangent to the spiral pipe The angle between the center line and the side air supply pipe and the horizontal direction is 45°. Due to the high viscosity of the material flowing through the spiral tube, the diameter of the selected spiral tube is larger, and the circulation volume of the material is larger. The length ratio of the diameter of the spiral tube to the radius ...

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PUM

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Abstract

The invention relates to an alpha-shaped material returning valve. The material returning valve comprises a serpentine pipe, a material returning stand pipe flange, an inclined pipe flange and a side air feeding tube, wherein the serpentine pipe is alpha-shaped; one end of the serpentine pipe is connected with a vertical stand pipe through the material returning stand pipe flange while the other end is connected with a material returning inclined pipe through the inclined pipe flange; and the bottom of the serpentine pipe is provided with the side air feeding pipe. Compared with the prior art, the alpha-shaped material returning valve provides enough resistance for the stable operation of a recirculating fluidized bed, has no fluidization dead zone, simple structure and convenient operation, and can fulfill the aim of controlling the amount of a circulating material by only a puff of wind.

Description

technical field [0001] The invention relates to a material return valve, in particular to an α-type material return valve. Background technique [0002] Circulating fluidized bed is widely used in power plant boilers, chemical industry, metallurgy and other industries. Due to the unique fluid dynamic characteristics and structure, the circulating fluidized bed boiler has wide fuel adaptability and high combustion efficiency. The furnace has the advantages of gas-solid heat, fast mass exchange, uniform temperature in the bed, good product quality, high productivity, simple operation, and easy to realize continuous production and automation. [0003] The structure of the circulating fluidized bed includes the main bed body, gas-solid separation system, feeding system and so on. The return valve is an important part of the circulating fluidized bed return system. There are many structural types of return valves. At present, the return valves used in practical projects mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/26
Inventor 夏晓宇朱彤李渊
Owner TONGJI UNIV
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