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Back pressure overrunning control method for 300MW high back pressure unit system

An over-limit control, high back pressure technology, applied in the control system, heating system, heating method, etc., can solve problems such as back pressure over limit, and achieve the effect of safe and economical operation

Inactive Publication Date: 2013-12-25
HARBIN THERMAL POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing 300MW high back pressure unit is in operation, if some components fail, the back pressure is easily caused to exceed the limit, and further provides a back pressure overrun control method for the 300MW high back pressure unit system

Method used

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Embodiment Construction

[0008] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0009] A specific embodiment of the present invention provides a back pressure overrun control method for a 300MW high back pressure unit system, including:

[0010] When the unit operating load of the 300MW high back pressure unit system is low and the return water temperature decreases causing the back pressure to exceed a predetermined value, increase the unit operating load until the back pressure is lower than the predetermined value;

[0011] When the unit operating loa...

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Abstract

The invention provides a back pressure overrunning control method for a 300MW back pressure unit system. The method includes: when back pressure overruns a predetermined value in case of low unit operational load and decreased return water temperature in the 3mmMW high back pressure unit system, increasing the unit operational load until the back pressure is lower than the predetermined value; when the back pressure overruns the predetermined value in case of high unit operational load and increased return water temperature in the 300MW high back pressure unit system, decreasing the unit operational load until the back pressure is lower than the predetermined value. The method has the advantages that the back pressure is adjusted according to different unit operational loads and return water temperatures, and safe economical operation of 300MW high back pressure units in a case of heat supply network failure is achieved effectively.

Description

technical field [0001] The invention relates to a back pressure overrun control method for a 300MW high back pressure unit system, and belongs to the technical field of motor heating equipment. Background technique [0002] The 300MW high back pressure unit is likely to have failures such as damage to the primary and secondary heat exchangers and leakage of the heating network during operation. These failures will increase the temperature of the return water and cause the back pressure to exceed the limit. When the back pressure exceeds the limit, the prior art generally needs to reduce the load of the unit, but if the load is reduced blindly, the back pressure may become more serious. Contents of the invention [0003] In order to solve the problem that the existing 300MW high back pressure unit is in operation, if some components fail, the back pressure is easily caused to exceed the limit, and further provides a back pressure overrun control method for the 300MW high ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B35/00F24D19/10
Inventor 丛永杰柏春光陈军马秉孝乔宏伟李正李滨
Owner HARBIN THERMAL POWER CO LTD
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