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Low-temperature economizer technology based heating network drainage waste heat recovery device and method for thermal power plant

A technology of waste heat recovery device and low-temperature economizer, which is applied in the direction of chemical instruments and methods, separation methods, preheating, etc., can solve the problems affecting the safety of the unit and the economy of the unit, so as to achieve full utilization and reduce the heat consumption rate Effect

Pending Publication Date: 2020-10-30
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Existing heat network drainage recovery device may affect the safety of the unit or affect the economy of the unit

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  • Low-temperature economizer technology based heating network drainage waste heat recovery device and method for thermal power plant

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Embodiment Construction

[0030] 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.

[0031] 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 low-temperature economizer technology based heating network drainage waste heat recovery device and method for a thermal power plant. The device comprises a heating network system, a regenerative system and a low-temperature economizer system. Heating extraction steam heats heating network primary water in a heating network heater, and heating network drainage is formed,and enters a low-temperature economizer mixing water tank through a heating network drainage pump; the outlet water temperature of the heater is about the design temperature at an inlet of the low-temperature economizer by closed-loop control of the temperature of the low-temperature economizer mixing water tank; and the drainage then enters a low-temperature economizer, heat of flue gas of a boiler tail flue is absorbed by the low-temperature economizer, exhaust gas temperature is reduced, and hot water obtained by heating flows to a condensate system. The system can effectively achieve safe,energy-saving and water-saving recovery of the heating drainage, and has good economic and environmental benefits.

Description

【Technical field】 [0001] The invention belongs to the field of new energy-saving technologies for thermal power plants, and relates to a device and method for recovering draining waste heat from a heating network of a thermal power plant based on low-temperature economizer technology. 【Background technique】 [0002] At present, most power plants in the north adopt the method of extracting steam for central heating in winter. The extracted steam passes through the heating network heater to heat the primary water of the heating network to form a heating network drain. According to the existing design, the heating network drains through a condenser or a water purifier Returning the oxygenator to the heat recovery system of the thermal power plant, but returning to the condenser will cause the temperature of the condensed water at the inlet of the finishing treatment to be too high, which will affect the quality of the condensed water; returning to the deaerator will increase the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22D1/50F16T1/00F16T1/38
CPCF16T1/00F16T1/38F22D1/50
Inventor 李钊赵志丹刘丽春安欣崔光明杨明强贾明祥李冰心张海龙
Owner XIAN THERMAL POWER RES INST CO LTD
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