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Coal blending combustion system and method

A combustion system and coal blending technology, which is applied in the field of coal blending and blending combustion systems, can solve the problems of insufficient safety protection in the coal-making process and insufficient combustion of mixed pulverized coal.

Active Publication Date: 2021-04-20
国电电力邯郸东郊热电有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004]In view of the above analysis, the present invention aims to propose a coal blending and blending combustion system and method to solve the problem of insufficient combustion of mixed pulverized coal and insufficient safety protection in the coal production process The problem

Method used

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  • Coal blending combustion system and method

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Effect test

Embodiment 1

[0103] 6 temperature detectors 21 and 6 showers 22 are arranged in the stacking system, and the 6 temperature detectors 21 and 6 showers 22 are all circumferentially arranged around the coal pile. Wherein the temperature detector 21 and the shower 22 are all within the normal range to ensure that the temperature in each zone of the coal pile. The coal quality detector is installed in the coal bunker so that workers can check the quality of coal in the coal pile at any time.

Embodiment 2

[0105] The gas outlet of the coal mill 11 is provided with a sensor 13, and the sensor transmits the outlet temperature, outlet coal fineness and primary wind speed to the server 12 through the wired network and / or wireless network. The combustible gas detection equipment 14 is arranged on the ceiling of the room where the coal mill 11 is located, and multiple shielding gas systems 15 can be installed and evenly distributed in the room to ensure that the room is filled with shielding gas at the fastest speed. The protective gas can be nitrogen and other inert gases. Explosion-proof doors 16 are arranged around the coal mill 11, generally with 1-3 floors, so as to reduce the explosion range as much as possible.

Embodiment 3

[0107] Lean coal powder and bituminous coal powder are blown into the swirl burner from two feed channels at a wind speed of 50 m / s according to a mass ratio of 1:1. The two air streams entering the swirl burner are blown in parallel through the stirring paddle in the mixing chamber, so that the stirring paddle rotates to mix the lean coal powder and bituminous coal powder in the air stream. Simultaneously, two air streams are designed to leave the mixing chamber from one air outlet to further mix the two pulverized coals.

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Abstract

The invention relates to a coal blending combustion system and method, and relates to the technical field of thermal power generation. the coal blending combustion system and method are used for solving the problems of insufficient combustion of mixed pulverized coal and insufficient safety protection in a coal preparation process. The coal blending combustion system comprises a coal pulverizing system and a combustion system, wherein the coal pulverizing system is used for correspondingly preparing meager coal powder and bituminous coal powder, the combustion system comprises a turbulent burner, the turbulent burner comprises a stirring paddle and a mixing chamber, a first feeding channel and a second feeding channel are formed in the mixing chamber, the first feeding channel is used for conveying first airflow, the first airflow is used for conveying the meager coal powder, the second feeding channel is used for conveying second airflow, the second airflow is used for conveying the bituminous coal powder, the stirring paddle is arranged in the mixing chamber, the first airflow and the second airflow drive the stirring paddle to rotate, and the stirring paddle is used for mixing the meager coal powder in the first airflow and the bituminous coal powder in the second airflow. According to the technical solution provided by the invention, the mixed pulverized coal can be fully combusted, and the safety of the coal preparation process is improved.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a coal blending and blending combustion system and method. Background technique [0002] Thermal power boilers are generally designed as lean coal, which is the coal with the highest degree of coalification and has low volatility. Its combustion performance is close to that of anthracite, and it has no cohesiveness, so it is not easy to coke. But in fact, boilers need to mix a part of lower-priced bituminous coal to reduce power generation costs. [0003] However, if the blending ratio of bituminous coal and lean coal is not properly controlled, problems such as high-temperature corrosion of the water wall, overheating of the main steam and reheated steam, coking of the boiler and damage to the water wall of the cold ash hopper will also occur. In addition, bituminous coal is prone to spontaneous combustion in the coal field during storage, and the explosion poi...

Claims

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Application Information

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IPC IPC(8): F23K1/00F23D1/02F23N1/00A62C3/06
Inventor 华兴鲁王建平任子明秦治国严晖徐明辉李奇伟郝亮田桂宇胡海涛周英杰李长澎
Owner 国电电力邯郸东郊热电有限责任公司
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