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Coal-fired power plant coal dust pipeline coal dust concentration leveling device and method

A technology for pulverized coal pipelines and coal-fired power plants, which is applied to combustion methods, combustion control, and combustion equipment, etc., can solve the problems of obstruction of the flow of pulverized coal, the actual effect of pulverized coal can not reach expectations, and the amount of pulverized air is limited. Tube resistance, efficient operation and stable and reliable effect

Pending Publication Date: 2022-08-02
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventor of this patent application has found through practice that due to the large ventilation resistance at the valves of the separation cylinder and the branch pipe, the flow of air powder will be hindered, and the amount of air powder entering the branch pipe is relatively limited, resulting in the actual adjustment of the pulverized coal concentration. The effect cannot meet expectations. Similarly, the non-powered branch pipe balancing method based on the above structure cannot achieve the effect of pulverized coal leveling, and the devices and methods under the above structure can only be adjusted in one direction, and reverse adjustment cannot be realized.

Method used

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  • Coal-fired power plant coal dust pipeline coal dust concentration leveling device and method
  • Coal-fired power plant coal dust pipeline coal dust concentration leveling device and method
  • Coal-fired power plant coal dust pipeline coal dust concentration leveling device and method

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specific Embodiment 1

[0024] combined with figure 1 to the attached figure 2 , a pulverized coal concentration leveling device for pulverized coal pipelines in coal-fired power plants, on each of the pulverized air main pipelines on the coal mill from the separator 01 up to the mixer 02 and then to each main powder pipe 03, at least one pulverized air pipeline is arranged in parallel Bypass pipe; the bypass pipe is equipped with an ejector 04, through the suction effect of the ejector 04 to achieve the balance of the powder concentration between the pipes.

[0025] Preferably, the ejector 04 includes an outflow pipe 1, a diffusion chamber 2, a mixing chamber 3, a receiving chamber 4, a jet nozzle 5, an inlet pipe 6, a suction pipe 7 and a return pipe 8; the inlet pipe The inlet end of 6 is connected with a compressed air source, the outlet end is connected with the jet nozzle 5, the jet nozzle 5 extends into the interior of the receiving chamber 4, and the receiving chamber 4 is sequentially conn...

specific Embodiment 2

[0028] combined with figure 2 with attached image 3, a pulverized coal concentration leveling device for pulverized coal pipelines in coal-fired power plants, which directly connects the main powder pipes 03 above each mixer 02 through two bypass pipes with opposite flow directions; the diameter of the bypass pipes is obvious It is smaller than the diameter of the main pipeline; an ejector 04 is installed on the bypass pipeline, and the suction effect of the ejector 04 is used to achieve the balance of the powder concentration among the pipelines.

[0029] Preferably, the ejector 04 includes an outflow pipe 1, a diffusion chamber 2, a mixing chamber 3, a receiving chamber 4, a jet nozzle 5, an inlet pipe 6, a suction pipe 7 and a return pipe 8; the inlet pipe The inlet end of 6 is connected with a compressed air source, the outlet end is connected with the jet nozzle 5, the jet nozzle 5 extends into the interior of the receiving chamber 4, and the receiving chamber 4 is seq...

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Abstract

The invention discloses a pulverized coal concentration leveling device for pulverized coal pipelines of a coal-fired power plant. At least one bypass pipeline is arranged in parallel on each air and pulverized coal main pipeline from a separator (01) to a mixer (02) and then to each main pulverized coal pipe (03) on a coal mill; or the main powder pipes (03) above the mixers (02) are directly communicated through two bypass pipelines with opposite flowing directions, and the diameter of the bypass pipelines is obviously smaller than that of the main pipes; an ejector (04) is installed on the bypass pipeline, and balance of the powder concentration among the pipelines is achieved through the suction effect of the ejector (04). The invention further discloses a pulverized coal concentration leveling method for the pulverized coal pipeline of the coal-fired power plant. The method comprises the steps that firstly, the bypass structure is arranged; and then each bypass pipeline is connected with an ejector (04), and the balance of the powder concentration of each pipeline is realized through the suction effect of the ejector. The pulverized coal leveling device has the beneficial effect that pulverized coal leveling is more efficient and stable.

Description

technical field [0001] The invention relates to the technical field of pulverizing systems, in particular to a device for leveling the concentration of pulverized coal in a pulverized outlet pipe of a pulverizer of a direct-blown pulverizing system in a coal-fired power plant. Background technique [0002] New energy power represented by solar energy and wind power will become the main power source in the future, but new energy power cannot provide stable power due to its obvious randomness and intermittency. To solve this problem, in addition to vigorously developing energy storage , the stable and reliable coal power can be used as the peak-shaving power source, which can play its role as a bottom-up guarantee and undertake emergency backup power to serve the new energy power system. The flexibility transformation of coal power is an important means to achieve peak regulation of coal power units. In the process of flexibility transformation, the stability of boiler combust...

Claims

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Application Information

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IPC IPC(8): F23K3/02F23N1/02
CPCF23K3/02F23N1/027F23K2203/006F23K2203/008F23K2203/201
Inventor 曹文广张巍田红辛凤郭帅
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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