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Composite circulating device and method for flue gas waste heat utilization

A compound cycle and flue gas waste heat technology, which is applied in combustion methods, waste heat treatment, indirect heat exchangers, etc., can solve problems such as increased coal consumption and reduced unit operation economy, and achieves lower inlet temperature, improved heat transfer effect, Improves the effect of running backpressure

Pending Publication Date: 2022-01-04
XIAN THERMAL POWER RES INST CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If this part of the heat is discharged directly, it will lead to a decrease in the operating economy of the unit and an increase in coal consumption

Method used

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  • Composite circulating device and method for flue gas waste heat utilization

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Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0028] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention discloses a composite circulating device for flue gas waste heat utilization. The composite circulating device comprises a flue gas system of a coal-fired power generating unit, an organic working medium power subsystem cycle and an absorption type refrigeration subsystem cycle. Flue gas waste heat generated by the flue gas system of the coal-fired power generating unit is used for driving a composite circulating system composed of the organic working medium power subsystem cycle and the absorption type refrigeration subsystem cycle, on one hand, the external power supply amount of the system is increased, and on the other hand, cooling capacity is produced. The prepared cooling capacity can be used for cooling inlet circulating water of a condenser and reducing the circulating water inlet temperature, so that the heat exchange effect of the condenser can be improved, the operation back pressure of a coal power unit is improved, low-grade heat energy is effectively utilized, the energy utilization rate is improved, and good economic benefits and environmental benefits are generated.

Description

technical field [0001] The invention belongs to the technical field of flue gas waste heat utilization, and in particular relates to a compound cycle device and method for flue gas waste heat utilization. Background technique [0002] Flue gas waste heat widely exists in metallurgy, chemical industry, electric power and other industries, and its total amount accounts for more than half of industrial waste heat resources, and most of them are medium and low temperature waste heat. If this part of waste heat resources can be effectively utilized, not only can the fuel economy be greatly improved, but also the CO2 can be effectively reduced. 2 , NO X The discharge of toxic and harmful substances, etc., produces good economic and environmental benefits. The exhaust gas temperature of pulverized coal boilers in large-scale thermal power plants is generally between 120 and 130°C, and the heat it carries accounts for about 3% to 8% of the input heat of the boiler. If this part o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F25B15/00F23L15/00F28D7/16F25B41/40F25B41/20F25B37/00F01D15/10
CPCF27D17/004F25B15/00F23L15/00F28D7/16F25B41/40F25B41/20F25B37/00F01D15/10Y02E20/34Y02A30/27Y02P10/25
Inventor 王妍马汀山吕凯居文平许朋江张建元石慧薛朝囡邓佳王春燕万小艳温婷
Owner XIAN THERMAL POWER RES INST CO LTD
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