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Fully automatic pulverized coal flow rate regulating valve installed on the pulverized pipeline of pulverizing system

A pulverizing system, flow rate adjustment technology, applied in the direction of sliding valve, lift valve, valve details, etc., can solve the problem of coal powder flow rate deviation, etc., to achieve the effect of stable adjustment process, good adjustment performance and linear characteristics

Active Publication Date: 2016-02-24
青岛立宇科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem that the pulverized coal flow velocity deviation in the coal pulverized pipe of the coal mill is relatively large

Method used

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  • Fully automatic pulverized coal flow rate regulating valve installed on the pulverized pipeline of pulverizing system
  • Fully automatic pulverized coal flow rate regulating valve installed on the pulverized pipeline of pulverizing system

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] Such as figure 1 and figure 2 As shown, the present invention provides a fully automatic pulverized coal flow rate regulating valve installed on the pulverized pipeline of the pulverizing system, including a valve body 1 and a valve core arranged in the valve body 1 . The spool includes upper and lower halves 3, 2, a driving device, a detection device and an inner sealing device. The upper and lower ends of the valve body 1 are provided with connecting flanges, and the valve body 1 is composed of upper and lower parts, which are connected by bolts for easy disassembly and replacement of various parts in the valve core.

[0030] Among them, the upper half body 3 is in the shape of a sleeve with a closed upper end, and the outer wall of the upper half body 3 is fixed on the inner wall of the valve body 1 by a plurality of brackets 4 evenly distributed along t...

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Abstract

The invention discloses a full-automatic pulverized coal flow speed adjusting valve installed on a powder conveying pipeline of a powder manufacturing system. The full-automatic pulverized coal flow speed adjusting valve comprises a valve body and a valve element arranged in the valve body. The valve element comprises an upper semi-body, a lower semi-body, a drive device and a detection device, wherein the upper semi-body is of a sleeve shape with the upper end closed, the outer wall of the upper semi-body is fixed to the inner wall of the valve body through a plurality of supports arranged in the circumferential direction, the upper end of the lower semi-body is fixedly provided with an outer sleeve arranged on the outer wall of the upper semi-body in a sleeved mode, the drive device is used for driving the lower semi-body to vertically move, and the detection device is used for detecting the position of the lower semi-body. The lower semi-body of the valve element vertically slides in the valve body, the flow area between the bottom face of the lower semi-body and the inner wall of the valve body changes in a gradually-contracting mode from bottom to top until the portion with the minimum throttling area is reached, and finally the effect of adjusting the resistance of the pulverized coal conveying pipeline system is achieved by changing the air flow speed of pulverized coal.

Description

technical field [0001] The invention relates to the field of combustion control of pulverized coal boilers in large-scale coal-fired power plants, in particular to a fully automatic pulverized coal flow velocity regulating valve installed on a pulverized powder conveying pipeline of a pulverizing system. Background technique [0002] The coal pulverizer of the pulverized coal boiler of a large coal-fired power plant generally adopts a direct blowing pulverizing system to provide pulverized coal for the burner, and the number of burners in each group is 4 to 8. According to boiler design codes and standards, the deviation of pulverized coal mass flow distribution between each group of burners should be less than ±10% (ratio to the average value of all pulverized coal tubes). The main factors that determine the distribution deviation of pulverized coal are the deviation of flow resistance between pulverized coal pipes, the deviation of pulverized coal concentration, the finene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/122F16K37/00F16K27/04F16K3/30
CPCF16K1/12F16K1/38F16K31/122F16K37/0025
Inventor 程加东
Owner 青岛立宇科技开发有限公司
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