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Method and device for zero emission of carbon dioxide by utilizing liquid hydrogen condensation

A carbon dioxide, zero-emission technology, applied in the field of Brayton cycle system and process, can solve the problems of zero CO2 emission, consumption, system efficiency decline, etc., and achieve the effect of excellent efficiency, high efficiency, reliable and safe operation

Active Publication Date: 2011-04-13
江苏中国科学院能源动力研究中心 +1
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Problems solved by technology

But this cycle can only separate and recover about 80% of the CO produced by the combustion process 2 , has not yet achieved CO 2 zero emission
[0020] It can be seen that both in the conversion process of fuel and in the separation of CO from flue gas after combustion 2 , will consume extra energy, so that the system efficiency will drop significantly
At the current state of the art, CO 2 Separation process usually reduces system efficiency by 5-10%

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  • Method and device for zero emission of carbon dioxide by utilizing liquid hydrogen condensation
  • Method and device for zero emission of carbon dioxide by utilizing liquid hydrogen condensation
  • Method and device for zero emission of carbon dioxide by utilizing liquid hydrogen condensation

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Embodiment Construction

[0061] see figure 1 , the main part of the present invention is based on N 2 Semi-closed, regenerative Brayton cycle and liquid hydrogen (LH 2 ) gasification unit. In this cycle: 1-mixer; 2-LH 2 Gasifier; 3-compressor; 4-regenerator; 5-combustor; 6-gas turbine; 7-generator; 8-heat exchanger; 9-water separator; 10-splitter; 11- LH 2 booster pump.

[0062] The connection in the above system is a known technology, and the present invention will not be described in detail here.

[0063] System process description:

[0064] In the Brayton cycle, air (S1) and nitrogen (S2, containing a small amount of O 2 ) after mixing in the mixer 1 through LH 2 Gasifier 2 is exothermic and replaced by LH 2 Cool to the lowest temperature of the cycle (S4); then send it to the compressor 3 to increase the pressure to the highest pressure of the Brayton cycle (S5), and then send it into the combustion chamber 5 after being preheated by the turbine exhaust (S8) through the regenerator 4; the...

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Abstract

The invention relates to the technical field of energy sources, in particular to a Brayton cycle system and a flow for zero emission of carbon dioxide (CO2) by utilizing liquid hydrogen (LH2) condensation. The system is formed by coupling a semi-closed and regenerative Brayton cycle and a liquid hydrogen (LH2) gasification unit, the liquid hydrogen gasification unit is taken as a low-temperature cold source of the semi-closed and regenerative Brayton cycle so that the condensation process obtains a low temperature far lower than an ambient temperature. The Brayton cycle adopts a nitrogen working medium and a hydrogen fuel without CO2 generation during the combustion; therefore, the zero emission of various environment-harmful pollutions comprising the CO2 is realized under the condition of no need of additional energy consumption. At the same time, relative to the prior Brayton cycle with the nitrogen working medium which takes the environment as the cold source, the thermodynamic property of the Brayton cycle system is greatly improved, so the Brayton cycle system has good economical efficiency and broad engineering application prospect.

Description

technical field [0001] The present invention relates to a kind of utilizing liquid hydrogen (LH 2 )cold power generation technology and carbon dioxide (CO 2 ) Brayton (Brayton) cycle system and process combined with emission reduction technology. Background technique [0002] The technology relevant to the present invention mainly comprises utilizing cryogenic liquid fuel (LNG, LH at present) 2 etc.) cold Power generation technology and CO 2 Emission reduction technologies, the development status and system characteristics of their respective technologies are as follows: [0003] 1. Using cryogenic liquid fuel to cool power generation technology [0004] Compared with traditional fossil fuels (coal, oil, etc.), gaseous fuels such as natural gas and hydrogen have the advantages of high energy and cleanness. Based on the consideration of long-distance transportation and storage, gaseous fuels are mostly pressurized and liquefied into liquid fuels before being transp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C7/143F02C7/18F02C7/224
Inventor 张娜诺姆·里奥刘猛
Owner 江苏中国科学院能源动力研究中心
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