GB/Z 21193.2-2008Fossil-fired steam power stations -- Part 2: Drum-level control (English PDF)

Foreword

GB/Z21193 "mineral burning steam power station" is divided into the following sections.

--- Part 1. Limiting control;

--- Part 2. drum water level control;

--- Part 3. steam temperature control.

This guidance document is Part 2 of GB/Z 211193.

This Guidance Document is Equivalent to IEC/T R62140-2..2002 "Mineral Combustion Steam Power Plant Part 2. Drum Level Control System "(English version).

For ease of use, the following compilation changes have been made to IEC/T R62140-2..2002.

--- "technical report" be replaced by "technical guidance document";

--- Remove IEC/T R62140-2..2002 Foreword;

--- Remove IEC/T R62140-2..2002 introduction.

This guidance document is proposed by China Machinery Industry Federation.

The guidance of technical documents by the National Industrial Process Measurement and Control Standardization Technical Committee second sub-technical committee.

This technical guidance document is drafted by. Southwest University.

The guidance of technical documents Participated in the drafting of. Mechanical Industry Instrumentation Technology and Economy Institute, China Sihe Instrumentation Mission, Xi'an Thermal Research Institute Co., Ltd., Beijing Machinery Industry Automation Institute, Shanghai Institute of Industrial Automation Instrumentation.

Introduction

This Guidance Document is part of a series of Guidance Notes, which contains information on the control of the Mineral Burning Power Station Proper design and operation of the road. They are based on the technology solutions currently in use and at the same time, for the correct understanding Guidance documents also provide the necessary background information.

This Guidance Document presents or contains special technical solutions that address the needs of similar user needs and form A well-established method to represent the functional needs of operators and suppliers of Fossil-fired power plants.

Within the given time frame, this Guidance Document is strictly considered as a specific example of a technology solution that is intended to encourage on the topic of unity of view and promote discussion.

There are two types of instructional technical documents in this series.

The first type of guidance document relates to the boiler's special control loop, such as drum level control or steam temperature control, and the normal operating conditions in which they are located.

The second type of guidance document points out special ways to ensure proper operation under constraints, such as ascent and descent or in abnormal operating conditions, or they are related to the main control system of the furnace, such as load control system or frequency control system. These ones Guided technical papers usually unit the power station as a whole.

Each of the instructional technical papers in this series is independent of each other, however, their content is largely coordinated.

This series can be added.

GB/Z21193.2-2008/IEC TR62140-2.:2002 Mineral burning steam power station Part 2. Drum water level control

1 Scope

The subject of this guidance document is natural or forced circulation control of the drum level of a mineral-fired steam power station.

This guidance document first describes the description, structure and design of the controlled system, steady-state characteristics, transitional process characteristics and perturbation characteristics, and then Described the necessary control structure, followed by three have been verified control loop configuration, and gives their application site. this the final guidance document is necessary to form the various measuring elements and actuators necessary for the control loop, National statutory requirements, such as monitoring of the drum level and safety requirements, must also be taken into account.

2 Charged system