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GB 15577-2018: Safety regulations for dust explosion prevention and protection
GB 15577-2018
Safety regulations for dust explosion prevention and protection
ICS 13.230
C67
National Standards of People's Republic of China
Replace GB 15577-2007
Dust explosion-proof safety regulations
2018-11-19 release
2019-06-01 Implementation
State Administration of Market Supervision and Administration
Issued by China National Standardization Management Committee
Foreword
All technical contents of this standard are mandatory.
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 15577-2007 "Dust Explosion Safety Regulations". Compared with GB 15577-2007, the main technical changes are as follows.
--- Added three terms and definitions of "explosive dust environment", "cleaning" and "dust removal system" (see 3.2, 3.9 and 3.10);
--- Amended "Reduce the damage caused by the initial explosion" and "Prevention of secondary explosion", merged into "Dust explosion control" (see section
(Chapter 7, Chapter 7 and Chapter 8 of the.2007 edition);
--- Removed "ventilation and dust removal" (see.2007 version 6.6);
--- Added "dust removal system" (see Chapter 8);
--- Deleted "clean" (see.2007 version 8.3);
--- Added "Dust Control and Cleanup" (see Chapter 9);
--- Added "Overhaul" (see Chapter 10);
--- Amended "Individual Protection and Rescue" from "Individual Protection" (see Chapter 11, Chapter 9 of the.2007 edition).
This standard is proposed and managed by the Ministry of Emergency Management of the People's Republic of China.
This standard was drafted by. China Steel Group Wuhan Safety and Environmental Protection Research Institute Co., Ltd., Northeastern University, Guangdong Jinfangyuan Safety Technology Inspection
Limited company, National Explosion-proof Equipment Quality Supervision and Inspection Center (Guangdong).
The main drafters of this standard. Wang Zhi, Li Gang, Zhong Shengjun, Meng Xianwei, Wang Xinhua, Le Youbang, Wu Xiaoyu, Zhang Qianqian.
The release of previous versions of the standard replaced by this standard.
--- GB 15577-1996, GB 15577-2007.
Dust explosion-proof safety regulations
1 Scope
This standard specifies the general rules for dust explosion safety, the structure and layout of buildings (structures) in dust explosion hazardous locations, and prevention of dust clouds and dust
Dust layer fire, dust explosion control, dust removal system, dust control and cleaning, equipment maintenance and personal protection.
This standard applies to engineering and process design, production and processing, storage, equipment operation and maintenance of dust explosion hazardous locations.
This standard does not apply to coal mines, fireworks and firecrackers, fire explosives and strong oxidant dust places.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GB/T 3836.15 Explosive environment Part 15. Design, selection and installation of electrical installations
GB/T 11651 Personal protective equipment selection specification
GB 12158 General guidelines for preventing static accidents
GB 12476.1 Electrical equipment for flammable dust environment Part 1. General requirements
GB/T 15605 Dust explosion pressure relief guide
Classification and technical conditions of GB/T 16758 exhaust hood
GB/T 17919 Explosion-proof guidelines for dust collectors in dust explosion hazardous locations
GB/T 18154 Technical requirements for monitoring explosion suppression device
GB/T 24626 Explosion-proof equipment
GB/T 25445 Explosion suppression system
GB 50016 Fire Protection Code for Architectural Design
GB 50057 Lightning Protection Design Code for Buildings
GB 50058 Design Code for Power Equipment in Explosion Hazardous Environment
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Combustible dust
Dust, fibers or fly floes that can undergo a violent oxidation reaction with gaseous oxidants (mainly air) under atmospheric conditions.
3.2
Explosive dust environment explosive dustatmosphere
Under atmospheric conditions, the mixture of combustible dust and gaseous oxidant (mainly air) can be kept burning after being ignited
Spread the environment.
3.3
Dust explosion hazardous areas areasubjecttodustexplosionhazards
Where there is flammable dust and gaseous oxidants (mainly air).
3.4
Inerting
The technology of filling inert materials in the place where there is danger of dust explosion, making the dust/air mixture lose its explosiveness.
3.5
Explosion suppressionuppression
In the initial stage of the explosion, the flame was extinguished through physical and chemical action, so that the unexploded dust no longer participated in the explosion control technology of the explosion.
3.6
Explosion-proof explosionisolation
After the explosion, the technology of extinguishing the flame through physical and chemical action, preventing the explosion from spreading, and blocking the explosion within a certain range.
3.7
Ventingofdustexplosion
When an explosion occurs in the enclosure, before the explosion pressure reaches the ultimate strength of the enclosure, the high-temperature and high-pressure combustion products produced by the explosion
Explosion-proof technology that discharges unburnt matter in a non-hazardous direction through the pre-set weak parts on the enclosure, so that the enclosure will not be destroyed.
3.8
Secondary explosion subsequentexplosion
When a dust explosion occurs, the shock wave of the initial explosion will raise the unexploded deposited dust again, forming a dust cloud, which is ignited.
A continuous explosion occurred.
3.9
Cleaning
Use a method that does not cause dust to remove dust deposited in the workplace and equipment.
3.10
Dust removal system dustcolectionsystem
A system for collecting solid particles in a gas-solid two-phase flow composed of a dust hood, an air pipe, a dust collector, a fan, and a control device.
4 General
4.1 The enterprise should identify the existing dust explosion hazards and determine the number of combustible dust explosion hazards and the number of dust explosion hazards
The amount, location, hazardous area, etc., analyze the existing dust explosion risk factors, evaluate the dust explosion risk, and formulate to eliminate or effectively control the powder
Measures for dust explosion risk.
4.2 The enterprise shall establish a dust explosion-related safety management system (including dust removal system management, etc.) and post safety operation regulations, safety operation regulations
The process should include safety operations and emergency measures to prevent dust explosions.
4.3 Enterprises should formulate powders in accordance with this standard and combining their own processes, equipment, dust explosion characteristics, explosion protection measures and safety management systems, etc.
Dust explosion-proof safety checklist, and regularly carry out dust explosion-proof safety inspection. The enterprise should check at least once every quarter, and the workshop (or section) should be monthly
Check at least once.
4.4 Enterprises should carry out dust explosion-proof safety education and training, popularize dust explosion-proof safety knowledge and relevant regulations and standards, so that employees can understand their own enterprises
The degree of danger and explosion-proof measures of dust explosion hazardous locations in the industry; the main responsible persons of the enterprise, safety management personnel and the work of dust explosion hazardous positions
Industry personnel and equipment and facility inspection and maintenance personnel should carry out special dust explosion-proof safety technical training, and pass the examination before being allowed to work.
4.5 Enterprises should prepare emergency plans for dust explosion accidents, and regularly carry out emergency drills.
4.6 Ventilation and dust removal, dust explosion prevention and control, and other safety equipment and facilities should ensure continuous and effective, without corporate safety management department or safety
Approved by the person in charge, should not be replaced or discontinued.
4.7 Significant safety warning signs shall be set at the entrances, exits, production areas and key hazardous equipment of dust explosion hazards
Logo.
4.8 Dust explosion hazardous areas should be divided into 20 zones, 21 zones and 22 zones according to the frequency and duration of explosive dust environment.
The zoning should meet the following requirements.
-Area 20 should be an area where the explosive dust environment appears continuously or for a long time or frequently;
-Area 21 should be an area where an explosive dust environment may occasionally appear or appear in a fault state during normal operation;
-Area 22 should be an area where explosive dust environment is generally not possible during normal operation, even if it appears, the duration is short
Temporary.
5 Structure and layout of buildings (structures)
5.1 Process equipment with dust explosion hazards or buildings (structures) with dust explosion hazards should not be installed in public places and residential areas
In residential areas, the fire separation distance should comply with the relevant regulations of GB 50016.
The buildings with dust explosion hazards should be single-story buildings with frame structure, and the roof should be light-weight. If it is a multi-layer construction
Use frame structure.
5.2 Buildings where dust explosion hazards exist shall set up explosion-proof areas that meet the requirements of GB 50016 and so on.
5.3 For the engineering and process design involving the danger of dust explosion, when there is a special national standard, it should meet the requirements of the standard; there is a dust explosion
Dangerous process equipment should be installed in open spaces; if there is process equipment with dust explosion hazards in the plant, it should be installed at a higher position in the building
And close to the outer wall.
5.4 Beams, supports, walls and equipment should have a surface structure that is easy to clean.
5.5 Dust explosion hazardous locations (areas) should be provided with safety exits that comply with the relevant regulations of GB 50016, at least one of which is directly connected to the outdoor
Security exit.
5.6 Safe evacuation channels should be provided in dust explosion hazardous locations, and the location and width of the evacuation channels should meet the relevant regulations of GB 50016;
All evacuation channels should be kept clear, and emergency lighting and obvious evacuation indication signs should be set on the evacuation route.
5.7 Dust explosion hazardous locations should strictly control the number of workers in the area, and no crowded places such as lounges and meeting rooms are allowed.
Other factory buildings, staff quarters, etc. shall not be less than the fire safety distance specified in GB 50016.
6 Prevent the dust cloud and dust layer from catching fire
6.1 Preventing spontaneous combustion of powder
6.1.1 Hot powder with spontaneous combustion should be cooled to normal storage temperature before storage.
6.1.2 Under normal storage conditions, when storing large quantities of bulk powder with spontaneous combustion, the temperature of the powder should be continuously monitored; when the temperature is found
When the temperature rises or gas evolves, measures should be taken to cool the powder.
6.1.3 For metal dust in case of spontaneous combustion under wet conditions, waterproof and moisture-proof measures shall be taken during the collection, stacking and storage.
6.2 Prevent ignition of open flames and hot surfaces
6.2.1 There should be no open flames in dust explosion hazardous locations. When hot work is required, the following regulations should be observed.
--- Approved by the person in charge of safety production management and obtained the hot work approval certificate;
--- Before hot work, combustible dust within 10m of hot work place should be cleared and equipped with sufficient fire extinguishing equipment;
--- Powder-operated equipment in hot work section should be stopped;
--- The hot work section should be effectively separated or partitioned from other sections;
--- After the hot work, the inside and outside of the equipment should be fully checked to ensure that no hot-melt welding slag is left to prevent smoldering of dust;
--- During the hot work and the cooling period after the work is completed, no dust should enter the open flame work place.
6.2.2 For equipment or devices in direct contact with dust (such as motor housing, transmission shaft, heating source, etc.), the maximum allowable temperature on the surface should be lower than the phase
The minimum ignition temperature of the dust;
6.2.3 The transmission mechanism of equipment and devices in dust explosion hazardous locations shall meet the following requirements.
--- The bearings of the process equipment should be sealed and dust-proof and regularly maintained; when there is a possibility of overheating, a continuous monitoring device for bearing temperature should be installed;
--- When the belt drive is used, a slip monitoring device should be set; when the belt slips, it should automatically stop or emit an audible and visual alarm signal;
--- Metal powder dry grinding equipment should be equipped with a temperature monitoring device. When the metal powder temperature exceeds the specified value, it should be automatically shut down.
6.3 Protection against electric arcs and sparks
6.3.1 Buildings (structures) in dust explosion hazardous locations shall take corresponding lightning protection measures in accordance with the relevant provisions in GB 50057.
6.3.2 When there is a danger of static ignition, in addition to complying with the relevant requirements of GB 12158, the following regulations shall also be observed.
--- All metal equipment, device shells, metal pipes, brackets, components, parts, etc., should be directly grounded with anti-static measures; inconvenient or
If the process does not allow di...