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Method for preparation of fuel for blast furnace injection and fuel oil for transport

A technology of fuel and blast furnace, which is applied in the field of preparation of fuel for blast furnace injection and transportation of fuel oil, which can solve the problems of slow heating rate, high production cost of coal tar, excess gas volume, etc., and achieves increased productivity, important application value, and economical application Effect of Value Improvement

Inactive Publication Date: 2012-02-01
PINGLUO XIANGTAI COAL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vertical furnace process requires the use of lump coal, and the particle size of the incoming coal is not less than 20mm; the rotary furnace process and the horizontal chamber coking process require the use of pulverized coal, and the coal particle size is less than 13mm. Due to the high temperature in the production process and the slow heating rate, the gas yield rate Therefore, the production cost of coal tar is high, and the gas output is large. In addition to the gas that meets the needs of dry distillation, the amount of gas is seriously excessive. The utilization of gas must be considered, otherwise it will not meet the requirements of national environmental protection and industrial policies.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1. Production of blast furnace injection fuel and transportation fuel oil with long-flame coal as raw material

[0017] 1) Drying and pyrolyzing long-flame coal with a particle size of 0.5-40 mm in an internally heated rotary furnace with hot reaction gas at 450° C. for 5 hours to obtain coal tar, coal gas and fuel for blast furnace injection; the thermal The reaction gas is the hot waste gas produced by coal gas combustion; the diameter of the internal heating rotary furnace used is 3m, and the length is 30m.

[0018] According to the YB / T5075 method, the properties of the obtained coal tar are: Density (20°C): 1.05g / cm 3 , Ash: 0.02~0.2%, Moisture: 80 : 2~10;

[0019] The calorific value of the obtained gas is 1690kcal / m 3 , the names and contents of the main components in the obtained gas are: H 2 Content 25%, CH 4 content 9%, CO content 18%, CO 2 Content 13%, N 2 Content 35%;

[0020] Tested according to GB / T212 and GB / T214 methods, the physical an...

Embodiment 2

[0027] Example 2. Using non-caking coal as raw material to produce fuel for blast furnace injection and transport fuel oil using vertical carbonization furnace

[0028]1) Carry out dry distillation and pyrolysis reaction of non-stick coal powder with a particle size of 20-80mm in a vertical carbonization furnace with hot reaction gas at 500°C for 8 hours to obtain coal tar, coal gas and fuel for blast furnace injection; the thermal The reaction gas is the hot waste gas produced by coal gas combustion; the vertical carbonization furnace used is an internal heating type vertical carbonization furnace, the carbonization chamber is 6m high, the cross section is circular, and the cross-sectional area is 10m 2 ;

[0029] According to the YB / T5075 method, the properties of the obtained coal tar are: Density (20°C): 1.05g / cm 3 , Ash: 0.02~0.2%, Moisture: 80 : 2~10;

[0030] The calorific value of the obtained gas is 1680kcal / m 3 , the names and contents of the main components in th...

Embodiment 3

[0038] Example 3. Production of fuel for blast furnace injection and transportation fuel oil using long-flame coal and lean coal blending as raw materials

[0039] 1) After mixing the long-flame coal and lean coal with a particle size of 0.5-40mm according to the mass ratio of 1:0.4, carry out dry distillation and pyrolysis reaction with hot reaction gas at 550°C for 3 hours in an internal heating rotary furnace to obtain coal tar, Coal gas and the fuel for blowing into the blast furnace; the hot reaction gas is the hot waste gas produced by gas combustion; the diameter of the internal heating type rotary furnace used is 2.0m, and the length is 50.0m;

[0040] According to the YB / T5075 method, the properties of the obtained coal tar are: Density (20°C): 1.05g / cm 3 , Ash: 0.02~0.2%, Moisture: 80 : 2~10;

[0041] The calorific value of the obtained gas is 1700kcal / m 3 , the names and contents of the main components in the obtained gas are: H 2 Content 25%, CH 4 content 10%, ...

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Abstract

The invention discloses a method for preparation of fuel for blast furnace injection and fuel oil for transport. The method comprises the following steps of 1, putting raw material coal into a dry distillation furnace for a dry distillation pyrolysis reaction to obtain fuel for blast furnace injection, coal tar and gas and, 2, spraying the mixed gas of coal tar and gas by water to obtain a mixture of coal tar and water, separating the mixture to obtain coal tar, and carrying out hydrotreatment of the separated coal tar to obtain fuel oil for transport, and 3, separating hydrogen from the gas obtained by the step 1, burning the gas without hydrogen, and recycling hot waste gas produced in the burning, wherein the hot waste gas is utilized as combustion hot waste gas and for the step 1. Through control of a dry distillation pyrolysis final temperature and a proportion of middle, low and high volatile components in raw material coal, the method realizes coal-gas self-balance. The fuel which is produced by the method and is utilized for blast furnace injection has less than 20% of volatile components and thus satisfying requirements of fuel for blast furnace injection. The method improves a coal tar yield to a yield of 5 to 10%, and has important application values.

Description

technical field [0001] The invention relates to a method for preparing fuel for blast furnace injection and transporting fuel oil by dry distillation of coal, in particular to a method for preparing fuel for blast furnace injection and transporting fuel oil. Background technique [0002] The general coal carbonization and pyrolysis technology to produce fuel for blast furnace injection and coal tar includes vertical furnace process, rotary furnace process and chamber coking process. The vertical furnace process requires the use of lump coal, and the particle size of the incoming coal is not less than 20mm; the rotary furnace process and the horizontal chamber coking process require the use of pulverized coal, and the coal particle size is less than 13mm. Due to the high temperature in the production process and the slow heating rate, the gas yield rate Therefore, the production cost of coal tar is high, and the gas output is large. In addition to the gas that meets the needs...

Claims

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Application Information

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IPC IPC(8): C10B49/02C10B53/04C10B53/08C10B57/04
CPCY02P20/129
Inventor 张文辉唐清松
Owner PINGLUO XIANGTAI COAL CHEM
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