Control method of wind powder multi-parameter online detection device

A control method and detection device technology, which are applied in measurement devices, fluid velocity measurement, suspension and porous material analysis, etc., can solve problems such as clogging of the backrest tube for measuring flow velocity, inability to use real-time feedback control, and insufficient measurement accuracy, etc. Stable combustion, solving the inability to achieve online detection and uniform distribution

Active Publication Date: 2022-03-15
沃森能源技术(廊坊)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Measuring particle size currently requires laboratory personnel to take samples from the furnace coal pipeline and then sieve them. The process is cumbersome and the time delay caused by off-line sieving makes this method unusable for real-time feedback control; Insufficient measurement accuracy of single-point measurement in turbulent flow state

Method used

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  • Control method of wind powder multi-parameter online detection device
  • Control method of wind powder multi-parameter online detection device
  • Control method of wind powder multi-parameter online detection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] As mentioned in the background technology, in view of the problems in the prior art, this application proposes a wind powder multi-parameter online detection device, which is installed in the wind powder mixing pipeline 3, and one end of the wind powder mixing pipeline 3 is connected to the burner 9, and the other end is connected with the coal mill 1; the boiler 2 is provided with a plurality of said burners 9, and each said burner 9 is connected with said air-powder mixing pipeline 3, as figure 1 As shown, the online detection device includes:

[0043] The first detection component 6, each of the wind powder mixing pipeline 3 is provided with the first detection component 6, which is used to obtain the flow velocity of the powder particles in the wind powder mixing pipeline 3; specifically, as figure 2 The first detection component 6 is a gas-solid two-phase detection component, including a base 61, an electrode, and a signal processing unit 62. Preferably, the base ...

Embodiment 2

[0063] On the basis of Embodiment 1, the application proposes a control method for an air powder multi-parameter online detection device. A plurality of burners 9 are arranged on the boiler 2 along its height direction, each of which is connected to a wind turbine. Powder mixing pipeline 3, each wind powder mixing pipeline 3 is provided with wind powder control and equalization assembly 4, and the control method includes the following steps:

[0064] S10. Obtain the flow velocity of the powder particles in at least two of the air-powder mixing pipelines 3, which is called the first flow velocity; this embodiment uses the first detection component 6 described in Embodiment 1 to detect the air-powder mixing pipeline The flow rate of the powder particles in 3;

[0065] S20. Select the first flow rate with the smallest value as the second flow rate; each of the first detection components 6 transmits the obtained first flow rate of the powder particles to the control processing cen...

Embodiment 3

[0069] The same as Embodiment 2 will not be repeated, the difference is: the boiler 2 is provided with a plurality of burner groups along its height direction, and each group of the burner groups includes a plurality of the burner 9, so Described control method comprises the following steps:

[0070] S50. Obtain the flow velocity of the powder particles passing into each of the burners 9, and set it as the third flow velocity; the difference between this embodiment and the embodiment 2 is that there are multiple Burners 9, the burners 9 of the same height form a burner group;

[0071] S60. Select the minimum flow velocity among the third flow velocities in each group and set it as the fourth flow velocity to obtain a fourth flow velocity set, the fourth flow velocity set includes the minimum flow velocity of each set of the burner groups; in this embodiment The concept of the control method is: first compare the flow rate of the powder particles passing into the burner groups...

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Abstract

The invention provides an air-powder multi-parameter online detection device and a control method thereof. The air-powder multi-parameter online detection device is arranged on an air-powder mixing pipeline, one end of the air-powder mixing pipeline is connected with a combustor, and the other end of the air-powder mixing pipeline is connected with a coal mill; a plurality of combustors are arranged on the boiler, each combustor is connected with the air-powder mixing pipeline, and the online detection device comprises a first detection assembly, a second detection assembly and a control assembly, and the first detection assembly is used for obtaining the flow speed of powder particles in the air-powder mixing pipeline; the air powder balance adjusting assembly is arranged on the upstream of the first detection assembly in the flowing direction of the powder particles; the control device is used for receiving the multiple pieces of flow velocity information and selecting the minimum flow velocity as the standard flow velocity, and when the deviation between other flow velocities and the standard flow velocity exceeds a set threshold value, the control device adjusts the air-powder balance adjusting assembly so as to block flowing of powder particles with the large flow velocity; the pulverized coal introduced into the boiler burner by each pipeline is adjusted to be uniformly distributed, so that the combustion of the boiler is more stable, and the heat loss of the boiler is reduced.

Description

technical field [0001] The present application relates to the technical field of boilers, in particular to a control method of an air powder multi-parameter online detection device. Background technique [0002] Coal in thermal power plants usually needs to be pulverized into pulverized coal by using a coal mill. Because the pulverized coal has good combustion characteristics, the finer the pulverized coal particles, the easier it is to catch fire and burn completely, which can reduce the loss of incomplete combustion. [0003] There are multiple burners installed on the boiler, and each burner is connected to the air-powder mixing pipe. The coal mill transports the coal powder to the burner through the air-powder mixing pipe for combustion. If the coal at each burner in the boiler The uneven distribution of powder will cause the flame center to deviate, resulting in unstable combustion and high temperature corrosion. [0004] At present, the artificial sieving method and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/00G01P5/08G01N15/02G01N15/06
CPCG01P5/00G01P5/08G01N15/02G01N15/06Y02E20/34
Inventor 常寿兵曾健云王鹏曹悦杨盼闫国兴齐晓恩徐佳鹏宋晨磊
Owner 沃森能源技术(廊坊)有限公司
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