Direct high back pressure heat supply system of indirect air cooling unit

Abstract

The invention relates to the technical field of unit heat supply, in particular to a direct high back pressure heat supply system of an indirect air cooling unit. The direct high back pressure heat supply system comprises a condenser and is characterized in that recycled water pipelines in the condenser are uniformly divided into two separate parts: on one side, a water inlet pipe communicates with a heat supply network water return pipe, and a water outlet pipe communicates with a heat supply network water heater by virtue of a heat supply network circulating pump; on the other side, the water inlet pipe communicates with an indirect cooling tower through a frequency conversion circulating water pump, and the water outlet pipe communicates with the water inlet pipe of the indirect cooling tower. The direct high back pressure heat supply system is small in investment and simple in structure, takes effect quickly, and can realize operation under pure condensing and back pressure modes; in addition, in case that the heat supply network is abnormal, the unit can switch over two operational modes without halt to ensure operating safety of the unit.

Description

(1) Technical field [0001] The invention relates to the technical field of unit heating, in particular to a direct high back pressure heating system of an indirect air-cooling unit. (2) Background technology [0002] The low-pressure cylinder high back pressure circulating water heating energy-saving renovation project can effectively reduce the coal consumption of power generation and reduce the emission of carbon dioxide, sulfur dioxide and other waste gases, improve the reliability and capacity of heating supply, and have significant economic, environmental and social benefits. Exploring the energy-saving potential of heating units has opened up a new way, which is of great significance to reducing energy consumption and improving corporate profitability. It also meets the national requirements for sustainable development, energy conservation and emission reduction in the 12th Five-Year Plan. [0003] In the conventional high back pressure heating system, on the one hand,...

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Problems solved by technology

[0003] In the conventional high back pressure heating system, on the one hand, the unit operates in a heat-fixed power mode, and the electric load is limited by the heat load; Effectively take away the exhaust heat of the low-pressure cylinder, and the high-back pressure heating unit must be shut down, causing huge losses to the enterprise

In addition, conventional high back pressure heating systems are applied to indirect air-cooled units, which cannot solve the problems of intercooler island antifreeze, power grid island operation, and heating network aging, which will directly affect the economy and safety of unit operation

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