Powered by Google-Search & Google-Books Chinese Standards Shop Database: 169760 (Sep 19, 2020)
HOME   Quotation   Tax   Examples Standard-List   Contact-Us   View-Cart
  

DLT435-2004

Chinese Standard: 'DLT435-2004'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusRelated Standard
DL/T 435-2004English150 Add to Cart 0--15 minutes. Auto immediate delivery. Code for the prevention of pulverized coal firing furnace explosions/implosions in power plant boilers Obsolete DL/T 435-2004

  Google-Books (Full-PDF will be auto-delivered in 0~10 mins):   DL/T 805.4-2016  DL/T 435-2004  DL/T 805.2-2016  DL/T 1498.1-2016
In 0~10 minutes time, full copy of this English-PDF will be auto-immediately delivered to your email. See samples for translation quality.  
DL/T 435-2004
DL
ELECTRICAL POWER INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 27.100
F 23
Recording number. 13556-2004
Replacing DL/T 435-1991
Code for the Prevention of Pulverized Coal Firing
Furnace Explosion/Implosions in Power Plant Boilers
电站煤粉锅炉炉膛防爆规程
ISSUED ON. MARCH 9, 2004
IMPLEMENTED ON. JUNE 01, 2004
Issued by. National Development and Reform Commission
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Terms ... 4 
3 Relevant Requirements on the Prevention of Furnace Explosions ... 9 
Appendix A ... 44 
Appendix B ... 46 
Appendix C ... 47 
Foreword
According to the Document Zong Ke Jiao [1998] No.18 issued by the previous
Ministry of Power Industry "Notice on issuing the Development and Revision Plan of
Professional Power Standards", this Code is revised based on DL 435-1991 "Code for
Prevention of Pulverized Coal Firing Boiler Firebox Explosion/implosions in Thermal
Power Plant".
There have been some significant changes in this Code over its previous editions in
the following technical aspects.
- MODIFY specified value of the furnace structural design pressure;
- ADD terms;
- ADD content on preventing furnace implosions;
- MAKE new supplement on the provisions of relevant equipment and their system
requirements as well as the running operations;
- ADD Informative Appendix “Reasons that may cause furnace explosion”
(Appendix A);
- ADD Informative Appendix “Explanation on the transient state pressure-bearing
capability designed for the furnace” (Appendix B);
- ADD normative appendix “Fuel trip time delay and additional alarm items”
(Appendix C).
This Code replaces DL 435-1991 since its implementation.
Appendix A and Appendix B of this Code are informative.
Appendix C of this Code is normative.
This Code was proposed by China Electricity Council.
This Code shall be under the jurisdiction and under the explanation of Technical
Committee for Standardization on Professional Power Plant Boilers.
This Code was drafted by Thermal Power Research Institute.
This Code was mainly prepared by Zheng Zemin, Gao Hanxiang, Yuan Ying and Xu
Chuankai.
This Code was first-time issued on September 18, 1991.
Code for the Prevention of Pulverized Coal Firing
Furnace Explosion/Implosions in Power Plant Boilers
1 Scope
This Code specifies basic requirements on relevant equipment and system aspects
for prevention of pulverized coal firing furnace explosions/implosions in power plant
boilers, shows out guide for the on/off sequence and operation of equipment.
This Code is applicable to pulverized coal firing furnace in power plant boiler.
2 Terms
For the purposes of this Standard, the following terms apply.
2.1
main primary air shut off gate
It is a kind of main air gate which can be closed tightly and prevent the primary air
entering the burners; generally, it shall be mounted on the pulverized coal-free airflow,
such as primary air fan outlet of positive pressure direct-blow pulverized-coal system
or coal pulverizer inlet of negative pressure direct-blow pulverized-coal system and
storage pulverized-coal system.
2.2
flame detector
The equipment to detect the flame-free and provide signal.
2.3
directional blocking
A sort of interlock system moves to the likely-to-be enlarged deviation direction and all
the relevant final control elements must be prohibited when the furnace pressure is
tested to deviate from the normal value significantly.
2.4
fan test block capability
2.11
ignitor
It can provide adequate ignition energy for igniting the permanent devices (including
sparker, igniting oil and popgun) of the main burner fuel for an instant. The capacity of
the ignitor as close relationship with the fire behavior of the main fuel, burner type and
requirement for the ignitor function, generally, it consists of Class-I and Class-II
ignitors.
Class-I ignitor. used to ignite the gas-pulverizer mixture entering the furnace from the
main burner in any operating condition. This type of ignitor requires large capacity;
generally, it shall be over 20% of the heat quantity of the main burner under full-load.
Class-II ignitor. can only be used to ignite the gas-pulverizer mixture entering the
furnace from the main burner according to the air volume and pulverized coal volume
when igniting, its capacity is generally 10%~20......
Related standard:   DL/T 435-2018  DL/T 425-2015
   
 
Privacy   ···   Product Quality   ···   About Us   ···   Refund Policy   ···   Fair Trading   ···   Quick Response
Field Test Asia Limited | Taxed in Singapore: 201302277C | Copyright 2012-2020