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Coal-biomass co-overcritical water catalysis-gasification hydrogen production plant and method

A technology of supercritical water and hydrogen production equipment, which is applied in the production of hydrogen and bulk chemical production, etc. It can solve the problems of increased investment, unfavorable separation and treatment of carbon dioxide, and easy blockage of pipelines, and achieves a simple and easy reactor structure. Control and process, keep the effect of the system unimpeded

Active Publication Date: 2005-08-17
陕西中核交大超洁能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems are: most of the pollutants produced in the coal gasification process are uncontrolled or under-controlled, causing serious pollution; the hydrogen content in the gasification products is low; the coal with high moisture content needs to be pretreated ;The volume of the gasifier is large and the gasification system is complex
In their patent EP1001002 (equivalent patent AU2813999, JP2000143202 and JP2979149B2), Japan HatanoHiroyuki et al. studied the supercritical water gasification of organic materials such as coal to produce hydrogen under the condition of adding a sufficient amount of carbon dioxide absorbent, and the hydrogen content in the obtained gas product Higher, but this method generates calcium carbonate after adding calcium oxide to absorb carbon dioxide, which is easy to block the pipeline. In addition, calcium oxide separator and regeneration reactor need to be installed after adding calcium oxide, which makes the system complicated
The U.S. Department of Energy funded GeneralAtomics to conduct supercritical water partial oxidation research on biomass and high-sulfur coal, etc. The hydrogen content in the gas products produced by partial oxidation of biomass is relatively high. The specific results of hydrogen production by partial oxidation of coal are not given, but only Poor gasification
Due to the addition of oxidant, this method needs to be equipped with oxidant storage, transportation and other equipment, which increases investment and complicates the system.
Foreign coal and biomass co-gasification research is mainly based on fluidized bed, and the gasification agent is mainly air and water vapor. The main problems are high gasification temperature, large gasification furnace volume, and complex gasification system. , the cost of the gas purification system is high, and the carbon dioxide content in the gas product is low, which is not conducive to the separation and treatment of carbon dioxide
There is no report on co-gasification of coal and biomass to produce hydrogen using supercritical water as gasification agent

Method used

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  • Coal-biomass co-overcritical water catalysis-gasification hydrogen production plant and method

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Experimental program
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Effect test

Embodiment 1

[0035] (1) according to 0.1wt% sodium hydroxide, 1wt% coal, 0.25wt% sodium carboxymethyl cellulose, all the other are water, prepare reaction raw material, pour into feeding tank after stirring evenly, with 1MPa nitrogen, react raw material from The feeding tank is pressed into the feeder, and the amount of nitrogen gas depends on the amount of reaction raw materials pressed in. Press 80% to 90% of the reaction raw materials in the feeding tank into the feeder, and the remaining 20% ​​to 10% of the reaction raw materials are required in the feeding tank to prevent Nitrogen enters the feeder;

[0036] (2) water pump makes more than 2 times of the reaction raw material flow through water mass flow meter 17, preheater 6, mixer 4, reactor 5, cooler 7, filter 8, back pressure valve 10, gas-liquid separation Device 11. Then adjust the back pressure valve 10 to boost the pressure, and the pressure is 25MPa. Then, the heating devices of the preheater 6 and the reactor 5 are turned o...

Embodiment 2

[0040] (1) according to 0.1wt% sodium hydroxide, 1wt% coal, 0.5wt% sodium carboxymethyl cellulose, all the other are water, mix reaction raw material, pour into feeding tank after mixing evenly, with 1.5MPa nitrogen gas, react raw material Press into the feeder from the feeding tank, the amount of nitrogen depends on the amount of reaction raw materials pressed in, press 80% to 90% of the reaction raw materials in the feeding tank into the feeder, and the remaining 20% ​​to 10% of the reaction raw materials are required in the feeding tank;

[0041] (2) Water pump makes more than 3 times of the reaction raw materials flow through water mass flow meter 17, preheater 6, mixer 4, reactor 5, cooler 7, filter 8, back pressure valve 10, gas-liquid separation Device 11. Then adjust the back pressure valve 10 to boost the pressure, and the pressure is 22.5MPa. Then, the heating devices of the preheater 6 and the reactor 5 are turned on to raise the temperature of the water, and the t...

Embodiment 3

[0045] (1) according to 0.1wt% sodium hydroxide, 1wt% coal, 1.0wt% sodium carboxymethyl cellulose, all the other are water, prepare reaction raw material, pour into feeding tank after mixing evenly, with 2MPa nitrogen, reaction raw material is from The feeding tank is pressed into the feeder, and the amount of nitrogen depends on the amount of the reaction raw materials pressed in. Press 80% to 90% of the reaction raw materials in the feeding tank into the feeder, and the remaining 20% ​​to 10% of the reaction raw materials are required in the feeding tank;

[0046] (2) Water pump makes more than 4 times of the reaction raw materials flow through water mass flow meter 17, mixer 4, reactor 5, cooler 7, filter 8, back pressure valve 10, gas-liquid separator 11. Then adjust the back pressure valve 10 to boost the pressure, and the pressure is 20MPa. Then, the heating devices of the preheater 6 and the reactor 5 are turned on to raise the temperature of the water to 750° C., there...

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Abstract

The present invention discloses one kind of supercritical water catalytic coal and biomass gasifying process and apparatus for producing hydrogen. The apparatus has material feeder with one inlet connected to the outlet of the material pump and the other inlet connected to the outlet of feeding tank, pre-heater with outlet connected to the preheated water inlet and inlet connected to the outlet of inner pipe outlet of the cooler, cooler with inlet connected to the inlet of water pump, water pump with outlet connected to the water tank, cooler jacket with outlet connected to the inlet of the first filter and the inlet of the second filter, and back pressure valve with inlet connected to the outlets of the first filter and the second filter. The present invention has special heating mode for fast heating of the reaction material, raised hydrogen content in the gas product, raised CO2 content in the gas product, and easy separation of CO2 and feeding of CO2 to the processing terminal. The present invention is simple, effective and feasible.

Description

technical field [0001] The invention belongs to the field of clean energy conversion and coal chemical industry, and particularly relates to a device for producing carbon-containing organic matter such as coal, biomass, and coal-biomass mixture, using supercritical water as a gasification agent for continuous catalytic gasification to produce high hydrogen content and methods. technical background [0002] Energy and the environment have increasingly become the focus of the international community. Converting abundant coal resources and green biomass energy into clean hydrogen energy has dual significance for energy and environment. [0003] At present, coal gasification can be converted into hydrogen using fixed bed, fluidized bed, entrained flow bed and molten bed, etc. The gasification process mainly involves three stages, namely, the main reaction stage, the water gas shift reaction stage, and the purification and compression stage. The main problems are: most of the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02
CPCY02P20/54
Inventor 郭烈锦闫秋会张西民
Owner 陕西中核交大超洁能源技术有限公司
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