Condensing and pumping and backpressure integrated system based on backpressure heating technique and application thereof

Abstract

The invention discloses a condensing and pumping and backpressure integrated system based on a backpressure heating technique and an application thereof. An intermediate pressure cylinder communicateswith a low pressure cylinder through a first pipeline; the intermediate pressure cylinder communicates with a high temperature heat source heater through a second pipeline; and the low pressure cylinder communicates with a low temperature heat source heater through a third pipeline, a waterway of a heat network circulating water supply system passes through the high temperature heat source heaterand the low temperature heat source heater in sequence, and water in the waterway circularly flows from the low temperature heat source heater to the high temperature heat source heater. According tothe change of operating conditions such as the increase of the exhaust temperature and the swelling amount of the low pressure cylinder, high operating pressure of heat network circulating cooling water of a condenser and the like in a high backpressure operating mode of a steam turbine, a condenser body is redesigned, the condition of replacing a low pressure cylinder rotor twice during shutdowneach year is avoided, a novel scheme of the low pressure cylinder rotor which is suitable within a wide operating backpressure range in winter and summer is adopted, and the low pressure rotor does not need to be replaced after the system operated.

Description

technical field [0001] The invention relates to the field of heating energy-saving upgrading and transformation, in particular to a condensing-pumping-back integrated system based on back-pressure heating technology and its application. Background technique [0002] At present, the domestic high back pressure heating transformation generally adopts the dual-rotor interchange scheme, that is, the low-pressure rotor suitable for high back pressure operation is used during the heating period, and the rotor for pure condensing operation is replaced during the non-heating period. The load rate of the unit during the non-heating period is not high, and the unit is shut down twice a year to replace the low-pressure cylinder rotor. The operation is complicated, a lot of manpower and material resources are wasted, and the economical operation cost is high. At present, there is no report on the condensing-pumping-back integrated system and its application based on the back-pressure he...

AI Technical Summary

Problems solved by technology

The load rate of the unit during the non-heating period is not high, and the unit is shut down twice a year to replace the low-pressure cylinder rotor. The operation is complicated, a lot of manpower and material resources are wasted, and the economical operation cost is high

At present, there is no report on the condensing-pumping-back integrated system and its application based on back-pressure heating technology

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