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Method for carrying out blast furnace blowing on biomass hydrothermal carbon

A biomass and hydrothermal carbon technology, applied in blast furnaces, biofuels, blast furnace details, etc., can solve the problems of deepening deterioration of ore and coke, adverse effects on normal blast furnace production, and increasing the amount of alkali metals in fuels, so as to improve transportation and efficiency. The effect of spraying performance, improving comprehensive utilization efficiency and reducing alkali metal content

Active Publication Date: 2019-09-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) The fiber content in biomass is high, and there are problems of high power consumption, low efficiency and high cost during mechanical crushing, and the fiber aspect ratio in biomass powder is high, and the gas-solid transportation performance is poor, and it is easy to block pipelines and Distributor, the biomass cannot be pulverized, transported and sprayed into the blast furnace using the existing equipment of the ironworks;
[0010] (2) The content of moisture and volatile matter in biomass is high, the calorific value is low, and the effect of replacing coke during blast furnace injection is poor. At the same time, the theoretical combustion temperature of the tuyere will decrease and the amount of bosh gas will increase, which will have a negative impact on the normal production of the blast furnace. ;
[0011] (3) The method of preparing biomass coke by pyrolysis of biomass and blast furnace injection can solve the problems of low calorific value and difficulty in making powder, but the pyrolysis process will cause the enrichment of alkali metals, which will reduce the content of alkali metals in biomass coke Much higher than that of pulverized coal, when the blast furnace is injected in large quantities, the amount of alkali metal brought in by the fuel will increase, causing the ore and coke in the blast furnace to deteriorate further, affecting the normal production of the blast furnace

Method used

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  • Method for carrying out blast furnace blowing on biomass hydrothermal carbon
  • Method for carrying out blast furnace blowing on biomass hydrothermal carbon
  • Method for carrying out blast furnace blowing on biomass hydrothermal carbon

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Experimental program
Comparison scheme
Effect test

Embodiment

[0053] use figure 1 One embodiment of the present invention will be described. A is biomass raw material, B is coking wastewater, C is desalination circulating water, D is condensed water, E is high-pressure steam from flash tank, F is oil-water mixture, G is biomass tar, H is crude potassium salt, I is Blast furnace gas, J is combustion-supporting air, K is high-temperature waste gas, L is low-temperature waste gas, M is biomass hydrothermal charcoal, N is bituminous coal, O is anthracite, P is a mixture of biomass hydrothermal charcoal and coal, and Q is high-pressure nitrogen . The biomass A is crushed by the pulverizer 1, and the slurry is prepared in the slurry storage tank 2. The pulping water can be one or both of coking wastewater B and desalination circulating water C in an appropriate proportion. The prepared slurry is transported under pressure by the high-pressure slurry pump 3. In order to improve the hydrothermal carbonization efficiency, the slurry is preheate...

Embodiment 2

[0071] usefigure 1 The equipment shown is an experiment of hydrothermal carbonization of biomass, in which waste poplar is used as biomass. The results of industrial analysis and elemental analysis of the biomass used are shown in Table 4.

[0072] Table 4 Industrial analysis and elemental analysis results of waste poplar wood

[0073]

[0074] The waste poplar wood in Table 4 is subjected to carbonization reaction in an autoclave after crushing and pulping, and the carbonization temperature and carbonization time are changed to obtain biomass hydrothermal charcoal. The obtained waste poplar wood hydrothermal charcoal is subjected to industrial analysis, elemental analysis, and calorific value. , Hastelloy grindability index and alkali metal content analysis, the results are shown in Table 5 and 6.

[0075] Table 5 Industrial analysis and elemental analysis of waste poplar wood hydrothermal charcoal

[0076]

[0077] Table 6 Analysis of Hastelloy's grindability index, ...

Embodiment 3

[0083] use figure 1 The shown facility performs experiments on hydrothermal carbonization of biomass using palm shells. The results of industrial analysis and elemental analysis of the biomass used are shown in Table 1.

[0084] Table 7 Results of industrial analysis and elemental analysis of palm shells

[0085]

[0086] After the palm shells in Table 7 are crushed and pulped, the carbonization reaction is carried out in an autoclave, and the carbonization temperature and carbonization time are changed to obtain biomass hydrothermal charcoal. The obtained palm shell hydrothermal charcoal is subjected to industrial analysis, elemental analysis, Calorific value, Hastelloy grindability index and alkali metal content analysis, the results are shown in Tables 8 and 9.

[0087] Table 8 Industrial analysis and elemental analysis of palm shell hydrothermal charcoal

[0088]

[0089] Table 9 Analysis of Hastelloy grindability index, calorific value and alkali metal content of...

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Abstract

The invention belongs to the technical field of blast furnace ironmaking, and particularly discloses a method for carrying out blast furnace blowing on biomass hydrothermal carbon. The method solves the problem that an optimal utilization method of biomass resources in blast furnace blowing process. The method can also be used for heat treatment of waste plastics, waste rubbers and other municipalcombustible solid waste water to prepare the hydrothermal carbon and the method can be efficiently applied to determination of a blast furnace blowing scheme. Under the condition that the influencesof biomass hydrothermal carbonization treatment, biomass hydrothermal carbon powder preparing, conveying and blowing on blast furnace smelting key process parameters are considered, the optimal utilization method for carrying out blast furnace blowing on biomass hydrothermal carbon is formed. According to the method, the system is analyzed by aiming at different biomass hydrothermal carbon, important assessment index of the blast furnace smelting downstream behavior is adopted, and the safe and efficient blast furnace blowing on the biomass hydrothermal carbon is realized, so that the comprehensive utilization efficiency of biomass resources is improved, and the emission of CO2 produced by the ironmaking is reduced.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to a method for injecting biomass hydrothermal charcoal into a blast furnace. Background technique [0002] Coal is a non-renewable resource, and its mining and use will pollute the environment. The mining and utilization of a large amount of coal resources has already had an adverse impact on my country's environment, resources, sustainable economic and social development. In order to promote the construction of ecological civilization and green development, the country has carried out macro-control at the policy level, from the control of new coal production capacity, the closure of outdated production capacity, to the control of total coal consumption, the development of clean and efficient use of coal, and other aspects to comprehensively promote the construction of ecological civilization and ECO development. As a large coal consumer, iron and stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00C10L5/44
CPCC10L5/447C21B5/003Y02E50/10Y02E50/30
Inventor 王广伟王川张建良宁晓钧梁旺
Owner UNIV OF SCI & TECH BEIJING
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