Method for preparing combustible gas and active coke powder through pyrolysis

A high-temperature pyrolysis and activated coke technology, applied in gas fuels, fuels, coke ovens, etc., can solve the problems of multiple impurities and cumbersome purification devices, and achieve the effects of improving safety, improving productivity and high production efficiency

Inactive Publication Date: 2015-01-28
赵建勋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its process integrates coal gasification, methanation and gas-steam combined cycle, which has technical advantages over the existing coal gasification process, and more effectively utilizes the potential of coal, but still does not get rid of the stereotype of the coal gasification process. The whole process uses oxygen , there is inevitably partial combustion and loss of coal, and the coke oven gas obtained with low calorific value contains more impurities, so cumbersome purification devices have to be installed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Construction of a 50kg / h coal pyrolysis intermediate test device in the industrial park of Jimo City, Shandong Province.

[0031] Datong gas coal is further pulverized, dried and upgraded through the coal powder preparation process to obtain coal powder with a fineness of 180-200 mesh and a moisture content of 0-2%. Press down the isolated air and send it into the high-temperature cracking furnace, the feeding speed is 50kg / h, the furnace temperature is about 800-900°C, the cracking time of the cracking furnace is about 2 seconds, and the combustible gas and active coke powder are obtained through the gas-solid separation device.

[0032] Under this condition, the detected gas components are:

[0033] Methane is 74.7%, ethane is 9.8%, hydrogen is 1.5%, carbon monoxide is 2.7%, and the rest is mainly carbon dioxide, with a calorific value of about 8032kcal / Nm 3 .

Embodiment 2

[0035] On the basis of Example 1, the raw material is lignite produced in Inner Mongolia, and the pulverized coal fineness after the pulverized coal preparation process is 140-170 mesh, the moisture content is 1-5%, the feeding speed is 120kg / h, and the furnace temperature is about 850 ~950°C, other conditions are the same as in Example 1.

[0036] Under this condition, the detected gas components are:

[0037] Methane is 56.3%, ethane is 8.5%, hydrogen is 6.2%, carbon monoxide is 8.9%, and the rest is mainly carbon dioxide. The calorific value of clean combustible gas is about 6563kcal / Nm 3 .

Embodiment 3

[0039] Construct a 7t / h coal pyrolysis industrialization unit in the Daxing'anling area of ​​Heilongjiang Province.

[0040] Lignite from the local Oupu coal mine is used. The fineness of the pulverized coal processed in the pulverized coal preparation process is finer than 60 mesh, and the moisture content is 0-6%. The pulverized coal passes through the feeding system with an air lock device, and is sent to the high-temperature cracking furnace under positive pressure to isolate the air. , the feeding speed is about 5t / h; the furnace temperature is about 850-980°C, the cracking time is about 3 seconds, and the combustible gas and active coke powder are obtained through the gas-solid separation device.

[0041] Under this condition, the detected gas components are:

[0042] Methane is 36.8%, ethane is 10.2%, hydrogen is 6.5%, carbon monoxide is 9.2%, and the rest is mainly carbon dioxide. The calorific value of clean combustible gas is about 5172kcal / Nm 3 .

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Abstract

The invention relates to a method for preparing clean combustible gas and active coke powder through coal pyrolysis. The method includes the following steps: 1, preparing coal dust: processing coal dust to prepare coal dust with required fineness; 2, carrying out pyrolysis: sending the coal dust obtained in step 1 into a pyrolysis furnace, and carrying out instant cracking in anaerobic closed environment to generate active coke powder and clean combustible gas; and 3, separating and recovering: discharging the active coke powder and the clean combustible gas from the pyrolysis furnace, and recovering. The whole process is instantly completed in a closed loop system without water, coal combustion or loss, or pollution emission, so the efficient clean conversion of coal is realized, and the energy utilization efficiency is improved.

Description

technical field [0001] The invention belongs to the field of coal application industry, and in particular relates to a method for preparing clean combustible gas and active coke powder by pyrolysis of coal. Background technique [0002] In the first half of the 21st century, the energy structure of most developing countries will mainly rely on conventional energy sources such as coal, oil, and natural gas. Existing coal gasification technologies generally have the problems of high energy consumption, heavy pollution, harsh requirements for coal types, and the potential of coal cannot be fully utilized. The coal-to-gas process uses a gasifying agent (O 2 、H 2 O or CO 2 ) reacts with coal of a specific type of coal to generate synthesis gas (CO, H 2 mixture), because the process is not carried out in a completely closed system, and the process also requires a large amount of water, so the combustion, oxidation and loss of coal are inevitable. The composition of the gas pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10L3/08
CPCC10B53/04C10B57/005C10B57/10
Inventor 赵建勋隋志文王照辉张伟刘美慧
Owner 赵建勋
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