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NB/T 11438-2023Operation guideline of circulating fluidized bed gasifiers (English PDF)

循环流化床气化炉运行导则

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

December 28, 2023

Implementation date

June 28, 2024

Scope

NB/T 11438-2023 is the English-translated version of 循环流化床气化炉运行导则.

NB/T 11438-2023 is an operating guideline for circulating fluidized bed gasifiers that turn coal into gas, together with their main auxiliary equipment.

It walks through pre-start checks of the gasifier body, refractory lining, feed, return and slag ports, start-up preparation and start-up itself, then normal gasification operation, adjustment principles, routine inspections and the automatic control, interlock and protection devices.

Separate clauses deal with normal shutdown, emergency and requested fault shutdowns, and troubleshooting of the feeding, slag discharge and ash conveying systems, with an informative annex on typical equipment failures, causes and remedies.

It applies to routine operation after commissioning and may guide other fluidized bed gasifiers. Issued on 28 December 2023, it has applied since 28 June 2024.

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Document preview — NB/T 11438-2023

National Standard of the People's Republic of China

ICS: 73.040
Classification: D 24

Issued by: National Energy Administration of the People's Republic of China

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 General Requirements
5 Start
5.1 Check before starting
5.2 Preparation before starting
5.3 Start operation
6 Gasification operation
6.1 Gasification operation principles
6.2 Gasification operation regulation principles
6.3 Regular inspections
6.4 Automatic control, program control, interlocking and protection devices
7 Normal shutdown
7.1 Preparation before shutdown
7.2 Shutdown Step
7.3 Shutdown precautions
8 Fault shutdown
8.1 General
8.2 Emergency shutdown due to fault
8.3 Fault request to shut down the furnace
8.4 Fault Shutdown Step
9 Troubleshooting
9.1 General
9.2 Feeding system failure
9.3 Slag discharge system failure
9.4 Ash conveying system failure
Appendix A (Informative) Major equipment failure phenomena, causes and treatment measures

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

1 Scope

This document specifies the startup, operation, shutdown, fault analysis and handling principles of circulating fluidized bed gasifiers and major auxiliary equipment.

This document is applicable to the daily operation of the circulating fluidized bed gasifier after commissioning, and can be used as a reference for other fluidized bed gasifiers.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 150.4 Pressure vessels Part 4: Manufacturing, inspection and acceptance

GB 6222 Gas Safety Regulations for Industrial Enterprises

GB 16912 Safety technical regulations for the production of oxygen and related gases by deep freezing

GB/T 20801.5 Pressure piping specification Industrial piping Part 5: Inspection and testing

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Fluidized bed gasifier

A gasification device that uses a fluidized bed as a gasification reactor to produce coal gas.

3.2 Circulating fluidized bed gasifier

A gasification device that uses a circulating fluidized bed as a gasification reactor to produce coal gas.

4 General requirements

Before the gasifier is put into operation, all kinds of fire protection facilities should be inspected and accepted, and safety and environmental protection facilities should meet the requirements; the unit using the gasifier should require the gasifier to The furnace technology provider provides complete design basic data.

5 Startup

5.1 Check before starting

5.1.1 Gasifier Inspection

Gasifier inspection shall meet the following requirements.

a) The refractory material of the gasifier body is not damaged, and there is no coke slag and ash accumulation on the surface;

b) The feed port, return port and slag discharge port of the gasifier are unobstructed and free of blockage;

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

Similar standards

NB/T 11439-2023|GB/T 22732-2026|GB/T 29721-2023|GB/T 35307-2023|GB/T 40566-2021|GB/T 38432-2019

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