Interlocking protection method for high-pressure steam pipe network

A high-pressure steam, interlocking protection technology, applied in the components of steam boilers, steam boilers, combustion methods, etc., can solve problems such as complex systems

Pending Publication Date: 2021-05-28
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, large-scale petrochemical and coal-to-oil chemical plant systems are extremely complex, and the correlation between systems, series and series, and devices is very high, and boilers and boilers are becoming more and more large-scale development

Method used

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  • Interlocking protection method for high-pressure steam pipe network
  • Interlocking protection method for high-pressure steam pipe network
  • Interlocking protection method for high-pressure steam pipe network

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Embodiment Construction

[0027] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0028] In the event of a boiler failure in a large-scale coal chemical industry system, the interlock protection system is used to adjust the process conditions of the high-pressure steam pipe network between the boiler equipment and the user equipment, and the boiler and the high-pressure steam are automatically allocated through automatic allocation of the amount of high-pressure steam. The high-pressure steam balance of the user unit prevents the interruption of the high-pressure steam caused by the unplanned shutdown of the boiler, resulting in a large load reduction or large-a...

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Abstract

The invention relates to the technical field of interlocking protection, in particular to an interlocking protection method for a high-pressure steam pipe network. The method comprises the following steps that a residual workload of a running boiler is increased according to a trip signal of the boiler; and when gas pressure / flow in the high-pressure steam pipe network reaches a preset pressure value / flow value, preset time is delayed to trigger interlocking, and user equipment is gradually stopped according to a preset stopping priority. According to the scheme of method, after tripping of the boiler, the residual workload of the running boiler is increased, a descending speed of the material pressure / flow in the high-pressure steam pipe network is reduced, interlocking is delayed to be triggered after the gas pressure / flow in the high-pressure steam pipe network is lower than the preset value, then the user equipment is stopped step by step according to a preset sequence, the situation that high-pressure steam is interrupted or unbalanced when the boiler stops in an unplanned mode is prevented, and great load reduction or large-area shutdown of the user equipment is avoided.

Description

technical field [0001] The invention relates to the technical field of interlock protection, in particular to an interlock protection method for a high-pressure steam pipe network. Background technique [0002] In recent years, large-scale petrochemical and coal-to-oil chemical plants have been rapidly constructed in China. Taking coal-to-oil chemical industry as an example, the current development directions of coal chemical industry mainly include coal-to-synthetic ammonia, coal-to-ethanol, coal-to-olefins, coal-to-oil, Coal gas, etc. Large-scale petrochemical and coal-to-oil chemical projects are often equipped with multiple large boilers, and a large number of steam pipelines of different grades are laid for the use of various user equipment. [0003] However, large-scale petrochemical and coal-to-oil chemical plant systems are extremely complex, and the correlation between systems, series and series, and devices is very high, and boilers and boilers are becoming more a...

Claims

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Application Information

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IPC IPC(8): F22B37/42F23M11/00
CPCF22B37/42F23M11/00
Inventor 冯光华张安贵刘素丽孙向前石博文石好亮朱楠陈九洲杨自玲董国如
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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