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

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

Active Publication Date: 2009-10-28
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
[0019] 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%

Method used

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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

[0060] 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.

[0061] The connection in the above system is a known technology, and the present invention will not be described in detail here.

[0062] System process description:

[0063] 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 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 regenerated 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 regenerated Brayton cycle so as to ensure that the condensation process of the semi-closed and regenerated Brayton cycle obtains low temperature far lower than ambient temperature, the Brayton cycle adopts a nitrogen working medium and hydrogen fuel, and no CO2 is produced 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 a cold source, the thermodynamic property of the Brayton system is greatly improved, so the Brayton 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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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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