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Combustion method of fuel in shaft kiln

A combustion method and shaft kiln technology, applied in the field of fuel combustion, can solve problems such as increasing the complexity of raw coal application, and achieve the effects of reducing NOx and cost

Inactive Publication Date: 2016-07-20
JIANGSU ZHONGSHENGYUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention patent with the patent number ZL201210531038.2 discloses a coal pulverized combustion method in an annular sleeve kiln, which predictably introduces coal powder into the process of calcining limestone in the sleeve kiln, but in this method, the coal injection gun is The particle size requirement of coal powder is also quite high, and it needs to reach a particle size of ≤180 mesh, so that the pre-processing precision of coal powder is high, which virtually increases the complexity of raw coal application

Method used

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Embodiment 1

[0017] This embodiment takes common vertical kiln calcined limestone as an example to illustrate a fuel combustion method in a vertical kiln, which includes the following steps: (1), gas fuel is sent from the calcination zone of the vertical kiln into the kiln for combustion to produce flue gas through the calcination zone 1. After preheating, it is discharged from the top of the kiln; (2) Raw coal and limestone are put into the kiln from the top of the shaft kiln, and then pass through the preheating zone, calcination zone and cooling zone in turn, and finally discharged out of the kiln from the discharge port at the bottom of the shaft kiln .

[0018] In this embodiment, the amount of raw coal added in the step (2) is that the heat generated by its combustion accounts for 50% of the total heat consumption of the entire process, and the measurement method of raw coal and limestone is: convert the amount of raw coal and limestone to A single weighing hopper is to determine the...

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Abstract

The invention discloses a combustion method of fuel in a shaft kiln.The method comprises the following steps: (1), gas fuel is sent into the kiln from a calcining zone of the shaft kiln and burns in the kiln to produce fume, and the fume is exhausted from the kiln top after passing by the calcining zone and a preheating zone; (2), solid fuel and gas fuel are added into the kiln from the top of the shaft kiln, pass by the preheating zone, the calcining zone and a cooling zone sequentially and are exhausted out of the kiln from a discharge port in the bottom of the shaft kiln.

Description

Technical field: [0001] The invention relates to a fuel combustion method, in particular to a fuel combustion method in a shaft kiln. Background technique: [0002] As an industrial furnace for calcining limestone with high efficiency, shaft kilns usually use gaseous fuels (such as blast furnace gas, converter gas, coke oven gas, natural gas, etc.) The fuel came higher, so more shaft kilns suffered from lack of gas and reduced production or even stopped production. At present, coal resources account for about 60% of my country's primary energy consumption. Experts predict that coal will still account for about 50% in 2050. This means that China's coal-based energy production and consumption structure will last for a long time. Not much will change. Due to the abundant coal fuel resources in China, it is necessary to expand the fuel use range of shaft kilns to better meet market requirements. Therefore, how to apply abundant coal resources to the process of calcining limest...

Claims

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Application Information

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IPC IPC(8): C04B2/10C04B2/12
CPCC04B2/108C04B2/12
Inventor 张林进梁新江王骁雄王志林陈小娟
Owner JIANGSU ZHONGSHENGYUAN TECH CO LTD
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