GB/T 36227-2018 in English

VALID

Super-scale air separation plants

Issued on:2018-05-14
Implemented on:2018-12-01
File Format:PDF
Delivery:Within 1 day

Price(USD)： $200.00
$194.00

Standard No:	GB/T 36227-2018
Document status:	VALID
Title in English:	Super-scale air separation plants
Title in Chinese:	特大型空气分离设备
Language:	English
File Format:	Electronic (PDF)
Delivery:	Within 1 day
Issued on:	2018-05-14
Implemented on:	2018-12-01
ICS Classification:	71.100.20-Gases for industrial application
Chinese Classification:	J76-Gas separation and liquefaction equipment
Professional Classification:	GB-National Standard
Related Keywords:	air separation equipment extra-large air separation equipment super-large air separation plant super-scale air separation plants introduction gb/t super-large air separation plant project background
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《GB/T 36227-2018特大型空气分离设备》由TC504（全国气体分离与液化设备标准化技术委员会）归口，主管部门为中国机械工业联合会。

Introduction

GB/T 36227—2018 Standard Overview

GB/T 36227—2018 "Extra-large Air Separation Equipment" is my country's first standard for extra-large air separation equipment. It mainly regulates air separation equipment with an oxygen and nitrogen output of not less than $60000\mathrm{m^{3}/h}$ produced by cryogenic methods. This standard was issued in 2018 and is under the jurisdiction of the National Technical Committee for Standardization of Gas Separation and Liquefaction Equipment.

Standard Development Background and Technology Evolution

With the increasing demand for high-purity oxygen and nitrogen in the industrial field, extra-large air separation equipment has become a key equipment for modern industrial production. This standard is formulated based on industry development needs and technological progress, and mainly solves the following problems:

Unify industry design and manufacturing specifications
Improve equipment safety and reliability
Optimize energy consumption and environmental protection requirements
Promote technological upgrading and intelligent development

Standard Framework Comparison Table (Technical Dimension)

Technical Dimension	Old version of the standard	GB/T 36227—2018
Equipment scale	-	Oxygen and nitrogen production ≥ $60000\mathrm{m^{3}/h}$
Design requirements	Non-standardization	Clear basic processes (external compression, internal compression), model compilation and performance indicators
Environmental protection requirements	No detailed regulations	Added environmental protection requirements such as atmospheric conditions and circulating cooling water, and emphasized carbon emission control

Interpretation of main technical specifications

1. Basic processes and models of equipment

The standard defines two basic processes:

External compression process: air filtration and compression → precooling and purification → expansion into upper tower → product compression out of cold box
Internal compression process: air filtration and compression → precooling and purification → pressurization and expansion → internal circulation compression

Model compilation is based on JB/T 11006, combined with specific process requirements.

2. Key design conditions and requirements

The equipment design must meet the following key conditions:

Raw material air quality: Table 1 specifies the allowable limit content of mechanical impurities, CO₂, CH₄ and other pollutants.
Atmospheric conditions: Table 2 specifies the design parameter requirements such as pressure, temperature, humidity, etc.
Circulating cooling water system: Table 3 specifies the technical indicators such as water inlet pressure, temperature, suspended matter content, etc.

Implementation suggestions

Case study: Implementation experience of a super-large air separation plant project

Background:A chemical company needs to build a super-large air separation plant with an oxygen output of $80000\mathrm{m^{3}/h}$.

Design and selection:According to GB/T 36227-2018, the external compression process was selected, and the molecular sieve adsorption system and cold box structure were optimized in combination with process requirements.

Manufacturing and inspection:The key components such as driving turbine steam and sealing gas source were selected and inspected in strict accordance with the requirements of Table 4 and Table 5.

Installation and commissioning:The fractionation tower system and cryogenic liquid pump were used, and the stress calculation of the cold box pipeline was performed to ensure safe operation.

Operation effect:After the equipment was put into use, the oxygen purity reached $99.8\%$, the energy consumption was lower than $102\%$ of the design value, and the noise met the requirements of GB12348.

Implementation suggestions

Design stage:Fully consider the raw material air quality, environmental conditions and process requirements, and reasonably select the equipment type and process.
Manufacturing link:Strictly control the quality of key components, such as molecular sieves, cryogenic liquid pumps, etc., to ensure that they meet the technical indicators in the table.
Installation and commissioning:Pay attention to the stress calculation and insulation measures of the cold box pipeline to avoid leakage problems during operation.
Operation and maintenance:Establish a complete online monitoring system and regularly check the performance parameters of core equipment such as adsorbers and expanders.