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Supercritical-transcritical carbon dioxide coal-fired power generation system adapting to different geographical environment climates and loads

A geographical environment, adapting to different technologies, applied in the field of supercritical-transcritical carbon dioxide coal-fired power generation systems, can solve the problems of not maximizing efficiency and economy, improve waste heat utilization, reduce system losses, and improve boilers and the effect of cycle efficiency

Pending Publication Date: 2021-08-24
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The problem raised in view of the above-mentioned background technology: For different geographical environments, the ambient temperature varies with the seasons. If it is operated according to a single system, the efficiency and economy cannot be maximized. The solution can be to design climates and loads suitable for different geographical environments. The supercritical-transcritical carbon dioxide coal-fired power generation system and the corresponding adjustment strategy to adapt to different geographical environments and climates

Method used

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  • Supercritical-transcritical carbon dioxide coal-fired power generation system adapting to different geographical environment climates and loads
  • Supercritical-transcritical carbon dioxide coal-fired power generation system adapting to different geographical environment climates and loads
  • Supercritical-transcritical carbon dioxide coal-fired power generation system adapting to different geographical environment climates and loads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Example 1: An example of a supercritical-transcritical carbon dioxide cycle coal-fired power generation operation system to cope with the climate in the southern region

[0078] Such as figure 1 and figure 2 As shown, the critical-transcritical carbon dioxide coal-fired power generation system includes boiler subsystem 1, circulation subsystem 2 and LiBr absorption refrigeration device 3 when dealing with the climate in the southern region.

[0079] The boiler subsystem includes cooling wall 11, reheating wall 12, superheater 13, high temperature reheater 14, low temperature reheater 15, economizer 16, air preheater 17, flue gas absorber 18 and ejector 19.

[0080] The circulation subsystem includes a bypass regenerator 201, a high temperature regenerator 203, a low temperature regenerator 205, a cooler 208, a branch working medium pump 213, a mainstream working medium pump 215, a bypass preheater 216, a primary Main compressor 217, secondary main compressor 218, re...

Embodiment 2

[0093] Example 2: An example of a supercritical-transcritical carbon dioxide cycle coal-fired power generation operation system to cope with the climate in the northern region

[0094] Such as Figure 4 and Figure 5 As shown, when dealing with the climate in the northern region, the critical-transcritical carbon dioxide coal-fired power generation system includes boiler subsystem 1, circulation subsystem 2 and thermoelectric refrigeration device 4. Boiler subsystem 1 is the same as that of Embodiment 1, and will not be repeated here.

[0095] Compared with Embodiment 1, the circulation subsystem 2 differs in that the valve group includes a fourteenth three-way valve 601 (hereinafter referred to as valve 601), a fifteenth three-way valve 602 (hereinafter referred to as valve 602), a sixteenth three-way valve Valve 603 (hereinafter referred to as valve 603), the seventeenth three-way valve 604 (hereinafter referred to as valve 604), the eighteenth three-way valve 605 (hereina...

Embodiment 3

[0109] Example 3: An example of a supercritical-transcritical carbon dioxide cycle coal-fired power generation operation system to cope with the climate in Northwest China

[0110] Such as Figure 7 and Figure 8As shown, when dealing with the climate in Northwest China, the critical-transcritical carbon dioxide coal-fired power generation system includes boiler subsystem 1, circulation subsystem 2, LiBr absorption refrigeration device 3 and thermoelectric refrigeration device 4. The boiler subsystem 1 is the same as that of Embodiment 1 and 2, the LiBr absorption refrigeration device 3 is the same as that of Embodiment 1, and the thermoelectric refrigeration device 4 is the same as that of Embodiment 2, which will not be repeated here; the circulation subsystem 2 is the same as that of Embodiments 1 and 2. Compared, the difference is that the valve group includes the twenty-third three-way valve 202 (hereinafter referred to as valve 202), the twenty-fourth three-way valve 20...

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Abstract

The invention discloses a supercritical-transcritical carbon dioxide coal-fired power generation system adapting to different geographical environment climates and loads. The supercritical-transcritical carbon dioxide coal-fired power generation system comprises a boiler subsystem, a circulation subsystem and a refrigeration subsystem, wherein the refrigeration subsystem adopts a LiBr absorption refrigeration device and / or a thermoelectric refrigeration device. According to the supercritical-transcritical carbon dioxide coal-fired power generation system adapting to different geographical environment climates and loads, the refrigeration system can be selected according to the environment temperature, the advantages of absorption refrigeration and thermoelectric refrigeration are coupled, and the problems that the environment temperature changes caused by four-season changes in different climatic environments, and the working medium pressurization mode changes are solved; the utilization rate of the waste heat of low-temperature flue gas of a boiler and the waste heat of low-temperature CO2 of a circulating cooler is increased, and the purposes of improving the boiler and circulating efficiency and reducing the system loss are achieved; three different operation systems for coping with safe and efficient operation of the system in different geographic positions and climates are provided; and two different boiler layout structures are provided to respectively deal with the efficiency and economy problems caused by different system loads.

Description

technical field [0001] The invention relates to the technical field of coal-fired power generation, in particular to a supercritical-transcritical carbon dioxide coal-fired power generation system adaptable to different geographical environments, climates and loads. Background technique [0002] my country is a big coal-consuming country, and the proportion of coal-fired power generation has always maintained an absolute dominant position. At present, the steam Rankine cycle is widely used in coal-fired power generation, but due to the physical properties and phase changes of water Problems such as loss and material limitations make the power generation efficiency a bottleneck. On the contrary, due to supercritical carbon dioxide (SCO 2 ) high cycle efficiency, compact system structure, water saving and environmental friendliness, etc., SCO 2 Coal-fired power generation has become one of the effective methods to break through the efficiency bottleneck of traditional powe...

Claims

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Application Information

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IPC IPC(8): F22B31/08F22B33/18F23J15/06F25B15/06F25B21/02F25B29/00F01D13/02F01K25/10
CPCF01D13/02F01K25/103F22B31/08F22B33/18F23J15/06F25B15/06F25B21/02F25B29/00Y02B30/62Y02E20/30Y02A30/27
Inventor 罗向龙陈玮梁颖宗陈健勇杨智陈颖
Owner GUANGDONG UNIV OF TECH
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