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GB/T 17919-2008 English PDF (GBT17919-2008)

GB/T 17919-2008 English PDF (GBT17919-2008)

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GB/T 17919-2008: Directives for dust explosion protection for dust collectors in dust explosion hazardous area

This standard specifies the requirements for dust explosion protection for dust collectors in dust explosion hazardous area. This standard applies to design, installation, use and maintenance of dust collectors in dust explosion hazardous area.
GB/T 17919-2008
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 13.230
C 67
Replacing GB/T 17919-1999
Directives for dust explosion protection for
dust collectors in dust explosion hazardous area
ISSUED ON. DECEMBER 15, 2008
IMPLEMENTED ON. OCTOBER 1, 2009
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Design ... 5
5 Installation ... 8
6 Use and maintenance ... 8
Foreword
This standard replaces GB/T 17919-1999 ?€?Directives for dust explosion protection for dust collectors in dust explosion hazardous area?€?.
Compared with GB/T 17919-1999, this standard has made the following changes. --- Replace the abolished quoted standard;
--- Modify some related technical parameters (see 4.1.6).
This standard was proposed by State Administration of Work Safety.
This standard shall be under the jurisdiction of National Safety Standardization Technical Committee Dust Explosion-proof Sub-Technical Committee (SAC/TC 288/SC 5).
The drafting organizations of this standard. SinoSteel Wuhan Institute of Safety and Environmental Protection, SinoSteel TianCheng Environmental Technology Co., Ltd., China Metallurgy Equipment Nanjing Co., Ltd.
The main drafters of this standard. Wang Zhi, Chen Longshu, Zhao Danli, Hu Dongtao, Zhu Bingan, Chen Qiang.
This standard was first released in November 1999, and this is the first revision. Directives for dust explosion protection for
dust collectors in dust explosion hazardous area
1 Scope
This standard specifies the requirements for dust explosion protection for dust collectors in dust explosion hazardous area.
This standard applies to design, installation, use and maintenance of dust collectors in dust explosion hazardous area.
This standard does not apply to mine-underground, fireworks and crackers, and civil explosive equipment?€?s production sites.
2 Normative references
The provisions of the following documents become the terms of the standard through reference in this standard. For dated references, all the subsequent amendments (excluding corrigendum) or revisions do not apply to this standard. However, encourage the parties who reach an agreement in accordance with this standard to study whether to use the latest version of these documents. For undated references, the latest version applies to this standard.
GB 12476.1 Electrical apparatus for use in the presence of combustible dust - Part 1-1. Electrical apparatus protected by enclosures and surface temperature limited (idt GB 12476.1-2000, IEC 61241-1.1999)
GB 15577 Safety regulations for dust explosion prevention and protection GB/T 15604 Terminology for dust explosion prevention
GB/T 15605 Guide for pressure venting of dust explosions
3 Terms and definitions
The terms established in GB/T 15604 AND the following terms and definitions apply to this standard.
3.1 Dust explosion hazardous area
4.5.2 Dust collector shall have antistatic direct-grounding facilities, and grounding resistance shall not exceed 100??.
4.5.3 The connection between dust collector and inlet-outlet ducts and
ash-unloading device shall be welded. If the flange is used, use conductor to cross over, and its resistance shall not exceed 0.03??.
4.5.4 The matched electrical equipment shall comply with the provisions of GB 12476.1.
4.6 Ash-unloading device
4.6.1 Ash-bucket?€?s in-wall shall be smooth, the included-angle between the wall surface of cutting and the horizontal plane shall be determined according to the repose-angle of dust, generally not less than 65??.
4.6.2 The angle between rectangular ash-bucket?€?s walls shall be treated with arc measures.
4.6.3 The lower part of ash-bucket shall install lock-air ash-unloading device. 4.6.4 Ash-unloading device shall be synchronized with dust collector operation, so that dust cannot be stored up in ash-bucket.
4.7 Automatic control and monitoring
4.7.1 It shall carry out dust cleaning process control for dust collectors. 4.7.2 The following parameters of dust collectors shall be monitored.
--- Pressure difference between air inlet and air outlet;
--- Temperature of air inlet-outlet and ash-bucket;
--- Dust cleaning parameters (cleaning cycle, cleaning intervals, etc.); --- Injection pressure of pulse-jet bag filter.
4.7.3 The operating condition of the following components of dust collectors shall be monitored.
--- Ash-unloading device;
--- Valve for dust cleaning (stop valve, switching valve, etc.).
4.7.4 It shall give an alarm when dust collectors have the following malfunction. --- The pressure difference between air inlet and air outlet is too high;

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