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System and method for treating pulverized coal and biomass

A technology of biomass and biomass coke, which is applied to the gasification of biofuels, carbides, and granular/powdered fuels. Solve problems such as gas biomass coke, achieve the effect of improving heat utilization rate, reducing energy consumption and improving quality

Inactive Publication Date: 2017-03-08
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the pyrolysis gas and biomass coke produced by biomass pyrolysis are not fully utilized, so that the existing technology cannot realize the graded utilization of biomass and coal, and the energy efficiency of the system is low

Method used

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  • System and method for treating pulverized coal and biomass
  • System and method for treating pulverized coal and biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Utilizing the system of the present invention, the biomass whose length is less than 10 mm is sent into the non-heat carrier regenerative preheating furnace. Biomass is pyrolyzed in the preheating furnace to produce biomass coke and oil and gas products. The pyrolysis temperature is 600°C and the pyrolysis time is 50 minutes; the pyrolysis oil and gas are separated from oil and gas to obtain light tar and pyrolysis gas 1; light tar It is directly collected, purified and stored; the pyrolysis gas 1 is transported to the PSA absorber through a pipeline, and passes through a block of quicklime bed at 0.6Mpa to remove water and CO 2 , and pass through the solid filter bed for dust removal and purification to obtain pyrolysis gas 2; the pyrolysis gas 2 enters the hydrogenation gasifier through the nozzle, and is fully mixed with the coal powder sprayed into the coal powder nozzle, and is heated at 850°C and 2.0MPa The hydrogenation gasification reaction is carried out to obt...

Embodiment 2

[0065] This embodiment is the same as the system used in the above-mentioned embodiment 1, but the process conditions are different, as described below. The biomass with a length of less than 10mm is sent into the non-heat carrier regenerative preheating furnace. Biomass is pyrolyzed in the preheating furnace to produce biomass coke and oil and gas products. The pyrolysis temperature is 500°C and the pyrolysis time is 40 minutes; the pyrolysis oil and gas are separated from oil and gas to obtain light tar and pyrolysis gas 1; light tar It is directly collected, purified and stored; the pyrolysis gas 1 is transported to the PSA absorber through a pipeline, and passes through a block of quicklime bed at 1Mpa to remove water and CO 2 , and go through the solid filter bed for dust removal and purification to obtain pyrolysis gas 2; the pyrolysis gas 2 enters the hydrogenation gasifier through the nozzle, and is fully mixed with the coal powder injected by the coal powder nozzle, a...

Embodiment 3

[0067] This embodiment is the same as the system used in the above-mentioned embodiment 1, but the process conditions are different, as described below. The biomass with a length of less than 10mm is sent into the non-heat carrier regenerative preheating furnace. Biomass is pyrolyzed in the preheating furnace to produce biomass coke and oil and gas products. The pyrolysis temperature is 650°C and the pyrolysis time is 60 minutes; the pyrolysis oil and gas are separated from oil and gas to obtain light tar and pyrolysis gas 1; light tar It is directly collected, purified and stored; the pyrolysis gas 1 is transported to the PSA absorber through a pipeline, and passes through a block of quicklime bed at 0.4Mpa to remove water and CO 2 , and pass through the solid filter bed for dust removal and purification to obtain pyrolysis gas 2; the pyrolysis gas 2 enters the hydrogenation gasifier through the nozzle, and is fully mixed with the coal powder sprayed into the coal powder nozz...

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Abstract

The invention discloses a system and a method for treating pulverized coal and biomass. The system comprises a biomass pyrolysis unit, an oil gas separation unit, a PSA (pressure swing adsorption) absorption unit, a pulverized coal hydrogasification unit and a calcium carbide smelting unit, wherein the biomass pyrolysis unit comprises a biomass inlet, a pyrolysis oil gas outlet and a biomass char outlet; the oil gas separation unit comprises a pyrolysis oil gas inlet, a pyrolysis oil outlet and a pyrolysis gas 1 outlet; the PSA absorption unit comprises a pyrolysis gas 1 inlet and a pyrolysis gas 2 outlet; the pulverized coal hydrogasification unit comprises a pulverized coal nozzle, pyrolysis gas 2 nozzles, a gasification char residue outlet and an oil gas outlet; the calcium carbide smelting unit comprises a biomass char inlet, a gasification char residue inlet, a powdery quick lime inlet, oxygen nozzles, a calcium carbide furnace gas outlet and a calcium carbide outlet. The pyrolysis gas is taken as a hydrogen source for hydrogasification, meanwhile, produced biomass char and gasification char residues obtained through hydrogasification are used for producing calcium carbide, system energy efficiency is improved, and quality-divided gradient utilization of biomass and coal is realized.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a system and method for processing pulverized coal and biomass. Background technique [0002] Coal hydrogasification refers to the process of reacting raw coal powder and hydrogen-containing reaction gas under high temperature and high pressure conditions (800°C-1000°C, 3MPa-8MPa) to generate methane-rich gas and light oil. Compared with traditional coal gasification, coal hydrogenation gasification has the characteristics of simple process, high thermal efficiency and low pollution, so it has been widely concerned and applied. However, hydrogen is expensive, so finding alternative atmospheres for hydrogen has become the focus of many researchers. [0003] At the same time, biomass is a kind of renewable energy with a huge net increase in output. At present, waste from agriculture, forestry and animal husbandry is generally burned directly as fuel, but this...

Claims

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Application Information

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IPC IPC(8): C10B53/02C10K1/32C10J3/48C01B32/942
CPCC10B53/02C10J3/48C10K1/32Y02E50/10Y02P20/10
Inventor 刘维娜丁力郭启海任爱林吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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