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Efficient and clean utilization technology for highly volatile young coal

A highly volatile and young technology, applied in the chemical industry, petroleum industry, climate sustainability, etc., can solve problems such as blade corrosion and gas turbine blade wear

Active Publication Date: 2014-11-05
金涌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem with this process is that the high-temperature gas obtained after direct combustion of pulverized coal contains a large amount of dust, which will cause wear to the blades of the gas turbine. At the same time, the high-temperature gas also contains a certain amount of alkali metal chloride and other sulfur / chlorine / phosphorus compounds. During long-term operation, these substances will scab on the turbine blades and cause corrosion to the blades, so it is necessary to strictly control the content of corrosive impurities in the gas entering the gas turbine

Method used

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  • Efficient and clean utilization technology for highly volatile young coal

Examples

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Effect test

Embodiment 1

[0056] Using lignite as raw material, in technology module I young coal dry distillation topping technology, lignite is crushed and sieved to obtain 6-20mm fragments, which are put into a low-temperature carbonization furnace and then dried in a preheating section at 150°C. The final coal block enters the dry distillation section at about 560°C for dry distillation. After dry distillation, it passes through the cooling section to obtain solid semi-coke, raw gas, crude benzene, crude naphthalene, tar, etc. The total amount of residual alkali metal in the solid semi-coke after dry distillation is 0.020 mg / kg. Then the semi-coke is crushed in the technical module II oxygen-enriched direct combustion preparation high-temperature gas turbine working fluid system, enters the combustion chamber, and is directly burned in a pure oxygen atmosphere to obtain a high temperature and high pressure of 1200 ° C, 2 MPa, containing 4.0% O 2 of gas. The high-temperature and high-pressure gas p...

Embodiment 2

[0059] Using long-flame coal with a volatile content of more than 20% as raw material, in the carbonization and topping technology of young coal types in technology module I, the long-flame coal is crushed and sieved to obtain 30-50mm fragments, which are loaded into the low-temperature carbonization furnace After drying in the preheating section at 200°C, the dried coal block enters the dry distillation section at about 600°C for dry distillation. After dry distillation, it passes through the cooling section to obtain solid semi-coke, crude gas, crude benzene, crude naphthalene, tar, etc. Then the semi-coke is crushed in the technical module II oxygen-enriched direct combustion system to prepare the high-temperature gas turbine working medium, and enters the combustion chamber, where it is directly burned in a pure oxygen atmosphere to obtain a high temperature and high pressure of 1300 ° C, 4 MPa, containing 3.0% O 2 of gas. The high-temperature and high-pressure gas passes ...

Embodiment 3

[0062] Using non-caking coal with a volatile content of about 25-30% as raw material, in technology module I dry distillation of young coal types, non-caking coal is crushed and sieved to obtain 100-120mm fragments, which are loaded into low-temperature carbonization After the furnace, it goes through a preheating section at 180°C for drying, and the dried coal block enters a dry distillation section at about 800°C for dry distillation. After dry distillation, the solids pass through a cooling section to obtain semi-coke, crude gas, crude benzene, crude naphthalene, tar, etc. Then the semi-coke enters the technical module II oxygen-enriched direct combustion to prepare the high-temperature gas turbine working fluid system. The semi-coke is crushed and then enters the combustion chamber, where it is directly burned in a pure oxygen atmosphere to obtain a high temperature and high pressure of 1100 ° C, 3 MPa, containing 5.0% O 2 of gas. The high-temperature and high-pressure gas...

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Abstract

The invention relates to an efficient and clean utilization technology for highly volatile young coal. By means of integrated innovation of the following six technological modules: ''a young coal dry distillation topping process, a system for preparation of a high temperature gas turbine working medium by semi-coke oxygen-enriched direct combustion, gas-fired power generation, supercritical / ultra supercritical power generation, CO2 trapping, and a dry distillation topping gaseous product high-value utilization technique'', especially the method for preparation of high-temperature and high-pressure fuel gas meeting the gas turbine working medium purity requirement directly by semi-coke oxygen-enriched direct combustion without lowering temperature to remove dust and impurities, thermodynamic-chemical full-value clean utilization of coal can be realized. The power generation efficiency can reach over 60%. Compared with the IGCC (integrated gasification combined cycle) technology, the invention substitutes semi-coke oxygen-enriched direct combustion for a coal gasification process needing large investment, develops a high temperature dust removal technology, and makes full use of the useful work of high temperature fuel gas. The invention has the characteristics of less investment, simple process, and high power generation efficiency, etc., and also generates benzene, naphthalene, fuel oil and other high value-added chemicals as byproducts.

Description

technical field [0001] The invention belongs to the fields of coal chemical production technology and gas-steam combined power generation technology, and specifically relates to a high-efficiency and clean utilization process of high-volatility young coal. Background technique [0002] China is one of the largest coal producers and consumers in the world, with coal reserves accounting for 20% of the world's total reserves, of which young coal types account for about 50%. Due to the problems of low calorific value and low utilization rate of traditional application methods in young coal types (such as lignite), it is difficult to meet the quality requirements of ordinary users, which affects the direct utilization of coal resources. Therefore, it is of great energy and environmental significance to study how to efficiently and cleanly utilize young coal resources. [0003] my country has vigorously promoted clean coal technology since the 1990s. The core is to convert coal i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10B57/00C10K1/00C10K1/32C01B3/50
CPCY02P20/10Y02P20/129Y02P20/54
Inventor 金涌胡永其胡山鹰王勇张志强余海鹏
Owner 金涌
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