Near-zero-emission and CO2 recycling type fossil energy utilization method

A fossil energy, near-zero emission technology, applied in gasification process, petroleum industry, granular/powder fuel gasification, etc. and water consumption, improving energy efficiency and reducing combustion risk

Active Publication Date: 2018-05-22
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Pure hydrogen combustion is prone to explosion and high NOx emissions. At present, it is mainly mixed with hydrocarbon fuel or nitrogen combustion
Currently CO 2 The research on resource utilization is mainly to synthesize methane, methanol, dimethyl ether or liquid fuel, etc., and the main problem is H 2 The dosage is large, the process energy consumption is high and the product life cycle is short

Method used

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  • Near-zero-emission and CO2 recycling type fossil energy utilization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A near-zero emission, CO 2 Fossil energy utilization methods for resource utilization, CO produced in the process 2 Synthetic chemicals, a certain amount of CO 2 Return to the power generation system for ring use, no CO in the whole process 2 External discharge; including the following steps:

[0029] (1) 1000 tons of lignite (sulfur content 2.03%) is used as fluidization gas with water vapor, and the gasification reaction is carried out at a pressure of 9.3Mpa and a temperature of 1350°C to obtain crude reformed gas, which is at a pressure of 6.5Mpa Under the condition of temperature and 230 ℃, the shift reaction is carried out to obtain the crude shift gas;

[0030] (2) After the crude shift gas goes through the low-temperature methanol washing process, first about 165 tons of high-purity hydrogen with a concentration of 99.5% are obtained, and then about 1076 tons of high-purity CO with a concentration of 99.1% are obtained by decompression analysis 2 ;

[0031]...

Embodiment 2

[0035] A near-zero emission, CO 2 Fossil energy utilization methods for resource utilization, synthetic chemicals, a certain amount of CO 2 Input back to the power generation system, no CO in the whole process 2 External discharge; including the following steps:

[0036] (1) 1500 tons of lignite (sulfur content 2.10%) use water vapor as fluidization gas, carry out gasification reaction under the conditions of pressure of 8.5Mpa and temperature of 1330°C, obtain crude reformed gas, crude reformed gas at the pressure of 6.5Mpa Under the condition of temperature and 240 ℃, carry out the shift reaction to obtain the crude shift gas;

[0037] (2) After the crude shift gas goes through the low-temperature methanol washing process, about 248 tons of high-purity hydrogen with a concentration of 99.4% are first obtained, and then about 1,600 tons of high-purity CO with a concentration of 99.1% are obtained by decompression analysis 2 ;

[0038] (3) High-purity CO 2 and high-purity...

experiment example

[0050] Taking Dazhuang coal as an example, Dazhuang coal is one of the common types of coal with high carbon content and low hydrogen content. The elemental analysis of Dazhuang coal is as follows:

[0051] Table 1

[0052]

[0053] The method of embodiment 1-2 and comparative example 1-2: the impact of different gas distribution on product yield and power generation is shown in Table 2:

[0054] Table 2

[0055]

[0056] From the comparison in Table 2, it can be directly seen that the distribution of different proportions of gas directly leads to the reduction of the yield and power generation of 1,3,5-s-triazinetriol, and the gas distribution in the coupling process is unreasonable CO 2 recycling and underutilization of C atoms, CO 2 It will be emitted into the environment during the coupling process, resulting in the loss of C.

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Abstract

The invention relates to a near-zero-emission and CO2 recycling type fossil energy utilization method. The method is characterized in that coal gasification, power generation and production of chemicals are coupled, wherein the logistics and energy in the whole coupling process are integrated, namely, a certain volume of CO2 which is continuously exhausted is extracted is input to a power generation system to realize recycling; water or steam produced by power generation is treated as fluidizing gas for gasification reaction; the rest CO2 is treated as the chemical raw material for producing 1, 3, 5-sym-triazinetriol; and the chemical production of the 1, 3, 5-sym-triazinetriol chemical product and the power generation are organically combined, so that the recycling of CO2 and the completeutilization of C atoms can be completely realized, and as a result, the zero emission of CO2 is achieved. With the adoption of the method, the key problem that a large volume of room-temperature CO2is exhausted in an existing multi-co-production technology is solved; the purposes of CO2 recycling, green energy and chemical industry can be achieved; the CO2 and hydrogen can be effectively organically utilized; the near zero emission of SO2, NOX, particles and CO2 can be realized; and moreover, the H2 power generation risk is reduced, and the CO2 recycling is achieved.

Description

technical field [0001] The invention relates to a near-zero emission, CO 2 The resource utilization method of fossil energy belongs to the technical field of coal combustion environmental protection. Background technique [0002] Fossil energy accounts for 85% of my country's primary energy, of which coal accounts for the highest proportion, about 66%. Extensive use of fossil energy leads to SO 2 , NO X , particulate matter and CO 2 Excessive emissions, the quality of the atmospheric environment has deteriorated sharply. Although the pollution can be reduced by removing various pollutants after combustion; it requires a large amount of equipment investment and produces a large amount of CO 2 . CO 2 The emissions not only aggravate the greenhouse effect and cause global climate change, but also lead to the waste of carbon resources. Hydrogen energy has attracted widespread attention due to its advantages such as high energy density, high heat conversion efficiency, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/46C10J3/72F02C6/00
CPCC10J3/46C10J3/72C10J2300/093C10J2300/0976C10J2300/1603C10J2300/1606C10J2300/1675F02C6/00
Inventor 朱维群柴树王倩孟丽
Owner SHANDONG UNIV
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