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Performance detection method and device of spray device

A technology of injection device and detection method, which is applied in the direction of measuring device, mechanical component test, machine/structural component test, etc., can solve problems such as high implementation cost, influence on coal powder diffusion, and inability to reflect the real performance of injection device, and achieve Easy operation and low implementation cost

Inactive Publication Date: 2014-04-02
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing technology adopts the experimental method, the implementation cost is high, and the experimental results are easily disturbed by the external environment, such as the ambient temperature, atmospheric pressure, etc. will affect the diffusion of coal powder, so the experimental results cannot reflect the real performance of the injection device

Method used

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  • Performance detection method and device of spray device
  • Performance detection method and device of spray device
  • Performance detection method and device of spray device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The embodiment of the present invention provides a method for testing the performance of an injection device, see figure 1 , the specific process of the method is as follows:

[0036] S101. Obtain the diameter D of the round hole jet nozzle of the injection device.

[0037] Under the extrusion of the injection device, the pulverized coal passes through the nozzle to form a circular hole jet and enters the boiler combustion chamber.

[0038] S102, establishing a mathematical model of a gas-solid two-phase circular hole jet diffusion process.

[0039] The mathematical model is a reasonable simplification and abstraction of the gas-solid two-phase circular hole jet diffusion process, enabling the original complex diffusion process to be simulated by a computer.

[0040] In the mathematical model, the gas can be considered as an ideal Newtonian fluid, the pulverized coal particles are rigid spheres with the same diameter and density, the ratio of the particle density to t...

Embodiment 2

[0050] The embodiment of the present invention provides a method for testing the performance of an injection device, see figure 2 , the specific process of the method is as follows:

[0051] S201. Obtain the diameter D of the round hole jet nozzle of the injection device.

[0052] S202, determining the governing equation of the gas.

[0053] The governing equations of gas include: continuity equation, momentum equation, temperature equation, and state equation.

[0054] in particular:

[0055] The continuity equation is ∂ ρ ∂ t + ∂ ρ u i ∂ x i = 0 ,

[0056] The momentum equation is ∂ ρ u ...

Embodiment 3

[0118] An embodiment of the present invention provides a performance detection device for an injection device, see Figure 9 , the device specifically includes:

[0119] The acquisition module 301 is configured to acquire the diameter D of the round hole jet nozzle of the injection device.

[0120] The modeling module 302 is used to establish a mathematical model of the gas-solid two-phase circular hole jet diffusion process.

[0121] Specifically, the modeling module 302 is specifically used for:

[0122] determine the governing equations for the gas;

[0123] determining equations governing the solid particles making up said jet;

[0124] Wherein, the governing equation of the gas includes: continuity equation, momentum equation, temperature equation, temperature equation finishing form, state equation,

[0125] The continuity equation is ∂ ρ ∂ t + ...

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PUM

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Abstract

The invention discloses a performance detection method of a spray device. The method comprises the steps of obtaining the diameter D of a circular hole jet nozzle of the spray device, establishing mathematical models of gas and solid phase circular hole jet dispersion processes, confirming numerical simulation parameters of the mathematical models according to the diameter D of the circular hole jet nozzle, confirming a circular hole jet spraying method, simulating the gas and solid phase circular hole jet dispersion processes according to the mathematical models, the numerical simulation parameters and the circular hole jet spraying method, so as to obtain simulated results, and performing detection analysis on the dispersion ability of the spray device according to the simulated results. According to the method, performance data is not required to be collected through field experimentation, and compared with the prior art, the method has the advantages of low implementation cost and easiness in operation.

Description

technical field [0001] The invention relates to the technical field of spraying, in particular to a performance detection method and device of a spraying device. Background technique [0002] The injection device is an important part of the pulverized coal power plant boiler. The injection device sprays the pulverized coal into the combustion chamber of the boiler. The pulverized coal is burned in the combustion chamber to generate heat energy, which is then converted into electrical energy by other equipment. [0003] The performance of the injection device directly determines the diffusion state and combustion effect of the pulverized coal after entering the combustion chamber. After the injection device injects the pulverized coal into the combustion chamber, the pulverized coal begins to diffuse under the action of the initial velocity, and the temperature also rises sharply. When the temperature rises to the ignition point and the pulverized coal diffuses to the extent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
Inventor 李德波徐齐胜
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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