Heat-engine plant heat supply network drainage waste heat recovery device and method based on seawater desalination technology

A technology for waste heat recovery device and thermal power plant, which is applied in seawater treatment, steam engine installation, heating water/sewage treatment, etc.

Pending Publication Date: 2020-10-20
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Existing heat network drainage recovery device may...

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  • Heat-engine plant heat supply network drainage waste heat recovery device and method based on seawater desalination technology

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[0026] 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.

[0027] 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 heat-engine plant heat supply network drainage waste heat recovery device and method based on a seawater desalination technology. The device comprises a heat supply network system, a heat regeneration system and a seawater desalination system. Heat supply extraction steam heats heat supply network primary water in a heat supply network heater to form heat supply network drain water, the drain water enters a drain heater through a heat supply network drain pump, the temperature of outlet water of the heater is guaranteed to be 70 DEG C or above through closed-loop control over the temperature of the drain heater, the outlet water enters a flash evaporator, obtained steam enters a low-temperature distillation seawater desalination device, seawater desalination is conducted on the steam in the low-temperature distillation seawater desalination device to obtain freshwater, meanwhile, wastewater is discharged, and low-temperature water generated by the flash evaporator returns to the condenser. The device can effectively realize safe, energy-saving and water-saving recovery of heat supply drain water, and has good economic and environmental benefits.

Description

【Technical field】 [0001] The invention belongs to the field of new energy-saving technology for thermal power plants and seawater desalination technology, and relates to a recovery device and method for draining waste heat of a heating network of a thermal power plant based on seawater desalination technology. 【Background technique】 [0002] At present, most power plants adopt steam extraction heating method for central heating in winter. The extraction steam passes through the heating network heater to heat the primary water of the heating network to form a heating network drainage. According to the existing design, the heating network drainage passes through the condenser or deaeration The deaerator is returned to the heat recovery system of the thermal power plant, but returning to the condenser will cause the condensate temperature at the finishing inlet to be too high, which will affect the condensate water quality; returning to the deaerator will increase the steam extr...

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Application Information

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IPC IPC(8): C02F1/04C02F1/06F01K17/02C02F103/08
CPCC02F1/04C02F1/06F01K17/02C02F2103/08Y02A20/124
Inventor 李钊张海龙赵志丹刘丽春安欣周刚林琳
Owner XIAN THERMAL POWER RES INST CO LTD
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