System for preparing solid, liquid and gas products from coal and biomass and method using same

A technology of gas products and solids, which is applied in the manufacture of combustible gases, the preparation of liquid hydrocarbon mixtures, solid fuels, etc., to achieve the effects of improving thermal efficiency of operations and reducing operating and maintenance costs

Active Publication Date: 2011-04-20
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the deficiencies in the above-mentioned prior art, the inventor of the present application aims to convert coal and biomass into solid, liquid and gaseous products from the existing system Or in the method, the very expensive thermal radiation syngas cooler is omitted, and at the same time, it is ensured that all the heat of pyrolysis is supplied by the released heat of gasification, so as to realize the complete cycle of the heat generated in the system between the pyrolysis furnace and the gasification furnace , to achieve thermal equilibrium of the system without feeding heat from any external heat source into the system

Method used

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  • System for preparing solid, liquid and gas products from coal and biomass and method using same
  • System for preparing solid, liquid and gas products from coal and biomass and method using same
  • System for preparing solid, liquid and gas products from coal and biomass and method using same

Examples

Experimental program
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Effect test

Embodiment 1

[0146] The bituminous coal feedstock was pulverized with known pulverizers to the following particle size distribution (PSD):

[0147] The particle size of 99% by weight of coal is <250 μm;

[0148] The particle size of 100% by weight of coal is <500 μm;

[0149] And it is dried by a known drier until the water content is lower than 12% by weight; the ash content is >1% by weight, and the melting temperature of the ash is <1500° C.; the calorific value of the coal is about 20900 joules / gram. The temperature of the dried coal is lower than 120°C, and the heat source of the dryer comes from the hot gas of the pyrolysis furnace or chilling unit, etc.

[0150] The above pulverized and dried coal is first fed into a known first lock hopper system, which is pressurized to slightly above 35 bar, such as 36 bar or 37 bar, and then fed into a known fluidized bed type pyrolysis furnace for the pyrolysis reaction. The operating pressure of the pyrolysis furnace is about 35 bar and the...

Embodiment 2

[0184] In Example 2, the bituminous coal raw material and its limitations are the same as in Example 1, and the pyrolysis furnace is a fluidized bed type pyrolysis furnace whose operating temperature and pressure are about 450-500° C. and about 40 bar, respectively; on the other hand , the gasifier is an upward gasifier fed with coal-water slurry, such as an E-gas type gasifier, and its operating temperature and pressure are about 1480° C. and about 45 bar, respectively. The residence time of the pulverized and dried coal in the pyrolysis furnace was about 27 minutes.

[0185] About 3 / 4 of the coke from the pyrolysis furnace is fed into the slurry tank at a pressure of about 40 bar to form a water coke slurry with a coke / water volume ratio of about 0.6 / 0.4 in an amount to form coke having the above Water of about three times the amount of water required for the water coke slurry is added to the above-mentioned slurry tank, wherein 2 / 3 of the water becomes high-temperature and ...

Embodiment 3

[0208] The raw coal is a lignite with a water content of 31%, and the calorific value is 19.33MJ / Kg after analysis. The raw coal is pulverized by known pulverizers to the following particle size distribution (PSD):

[0209] 80% by weight of coal have a particle size <250 μm;

[0210] The particle size of 100% by weight of coal is <500 μm;

[0211] And it is dried to a moisture content of less than 8% by weight through a known dryer; the temperature of the dried coal is lower than 150° C., and the heat source of the dryer is hot gas from a pyrolysis furnace or a chilling unit, etc.

[0212] First, the above-mentioned pulverized and dried coal is fed into a known first lock bucket system at a flow rate of 100-120 tons per hour, pressurized to slightly higher than 35 bar, such as 36 bar or 37 bar, and then fed into The pyrolysis reaction is carried out in a known fluidized bed type pyrolysis furnace. The operating pressure of the pyrolysis furnace is about 35 bar and the opera...

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Abstract

The invention relates to a system for preparing solid, liquid and gas products from coal and biomass and a method for preparing solid, liquid and gas products by using the system. The operation of the system is dependent on the integrated circulation of the heat generated in the system between a pyrolyzing furnace and a gasification furnace and the thermal balance when no any external heat is supplied to the system so that the thermal efficiency of the system is improved greatly; and a thermal radiation synthetic gas cooler (RSC) with high cost is saved from the system, wherein a chilling unit and a chilling medium in the region adjacent to a synthetic gas flow outlet and ejected in the gasification furnace chill the synthetic gas flow so that the synthetic gas from the chilling unit or the gasification furnace is filled in the pyrolyzing furnace, thereby ensuring that the operation temperature of the pyrolyzing furnace is controlled in the desired range of the pyrolytic reaction without needing an external thermal source for the pyrolytic reaction.

Description

technical field [0001] The present invention relates to systems for the production of solid, liquid and gaseous products from coal and biomass and methods of using said systems to produce solid, liquid and gaseous products, and more particularly to the production of solid, liquid and gaseous products from coal and biomass System and method of producing solid, liquid and gaseous products using said system, wherein the operation of the system relies only on the complete circulation of the heat generated in the above system between the pyrolysis furnace and the gasification furnace and in the absence of any exogenous heat Realization of heat balance in the case of feed into the above system. Background technique [0002] Coal or biomass pyrolysis requires the supply of energy to remove water and extract volatiles to obtain pyrolysis products. The Encoal process is powered by the hot fuel gas produced. The Lurgi process consists of injecting oxygen into the bottom of the gasif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/48C10J3/46C10J3/66C10J3/84C10J3/72C10J3/82C10B53/04C10B49/02C10J3/50C10J3/52
CPCC10J2200/156C10G1/08C10J3/62C10J3/76C10B49/02C10J2300/1884C10J2300/0909C10L9/08C10J2300/093C10B53/04C10J2300/1823C10J3/60C10G1/02C10J2300/1693C10J2300/1678C10J2300/0906C10J3/30
Inventor 刘科C·A·卡布雷拉秦强
Owner CHNA ENERGY INVESTMENT CORP LTD
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