
Commercial Oxidizer, Oven & Furnace Safety & Standards per NFPA 86
July 21, 2016 4:44 pmCommercial Oxidizer, Oven & Furnace Safety & Standards per NFPA 86

商用氧化剂、烤箱和炉子都受到严格的监管. Ship & Shore不仅帮助公司遵守空气污染设备的规定,还帮助公司遵守美国国家防火协会(NFPA)的规定,该规定还主要处理涉及工业技术的安全问题,比如bob登陆电脑版在Ship公司生产的再生式热氧化剂 & Shore. Below id the most updated information from Chapter 3 of NFPA 86.
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- Afterburner (Direct Thermal Oxidizer) is a direct thermal oxidizer, installed in series and downstream of process equipment, that generates VOC or HC; also referred to as secondary combustion chamber.
- Direct Thermal Oxidizer 是一种燃烧系统,燃烧器直接将VOCs或hc加热到破坏温度,而不对进入的气体进行热回收.
- Direct Catalytic Oxidizer 是一个燃烧系统,燃烧器直接加热挥发性有机化合物(VOCs)或碳氢化合物(hc)到破坏温度, prior to their introduction to a destruction catalyst, without heat recovery to the incoming gases, 其中催化破坏温度低于非催化(直接热)破坏温度.
- Fume incinerators
- Recuperative Thermal Oxidizer 是一种燃烧装置,燃烧器直接将VOCs或hc加热到破坏温度,燃烧的热产物在进入燃烧器火焰之前间接加热进入的气流.
- Recuperative Catalytic Oxidizer 是一种燃烧系统,在将VOCs或hc引入破坏催化剂之前,燃烧器直接将其加热到催化破坏温度, 之后,燃烧产物被用来间接加热进入的气流,在它接触燃烧器火焰之前, 其中催化破坏温度低于非催化(直接热)破坏温度.
- Regenerative Thermal Oxidizer is a combustion device in which the burner(s) directly heats VOCs or HCs after the gas stream is preheated to the destruction temperature by the periodic flow reversal of the gas stream through heat storage media that alternately have been heated by the product gases during an exhaust cycle and then have given up their heat to the incoming reactant gases during an inlet cycle.
- Regenerative Catalytic Oxidizer (RCO) is a combustion system in which the burner(s) directly heats VOCs or HCs after the gas stream is preheated to the destruction temperature by the periodic flow reversal of the gas stream through beds of ceramic heat recovery media with a coating or layer of catalyst that alternately have been heated by the product gases during an exhaust cycle and then have given up their heat to the incoming reactant gases during an inlet cycle.
- Flameless Thermal Oxidizer 是直接回热式或蓄热式燃烧系统,其中燃烧器在引入VOCs或hc之前对储热介质进行预热,在哪个系统中, subsequently; the destruction is carried out in interstices of the heat storage media in a flameless self-sustaining manner.
NFPA 86要求建立一个管理系统来维护和防止所有氧化剂系统的危害,一些规定如下:
Burner Management System (BMS) includes field devices, logic system, 以及用于燃烧安全和操作人员协助燃料制备和燃烧设备的启动和停止以及防止燃料制备和燃烧设备的误操作和损坏的最终控制元件.
在安装燃烧器管理系统逻辑时,应测试和验证燃烧器管理系统逻辑是否符合设计标准, replaced, repaired, or updated.
燃烧器管理系统逻辑包括以下对各种燃烧器和BMS代码通用的要求列表.
- Mandatory Purging
正确的燃烧室预燃吹扫对系统的安全运行至关重要,以防止可燃气体随后积聚的可能性
意外的或不正确的点火顺序导致爆炸. - Permissive Interlocks
典型的联锁包括高/低燃料和先导气体压力,高/低烟囱
温度,火焰损失,高/低燃烧室压力,燃烧空气损失,以及任何
由于燃烧器的设计或配置可能需要额外的起下钻
chamber. - Double Block and Bleed Systems
安全截止阀是BMS防止燃烧室内爆炸性混合物积聚的关键部件. Standard practice is to provide automated
安全关闭阀安装在主阀和导阀集水管上,采用双闸板和排气阀配置, except for radiant tube–fired burner systems. 对于多个燃烧器系统,每个单独的燃烧器上都应该安装一个额外的安全关闭阀. - Pilots and Ignition Systems
通常每个燃烧器都有自己的引燃器和点火系统. 点火器点燃引燃器,引燃器接着点燃主燃烧器. - Dedicated Flame Monitoring Systems
每个燃烧器都配有自己的火焰监测装置,并有独立的探测器来监督飞行员和主火焰. 根据飞行员和燃烧器的类型,可能会有例外. 通常,自检紫外线(紫外)或红外(红外)扫描仪是用来监测主火焰. - High / Low Pressure, Temperatures and Flow
根据工艺,高/低工艺流量/压力报警以及温度
可能需要防止操作超出设计参数. - Combustion Air and Draft Pressure Alarms and Controls
燃烧保护装置是一种安全装置或系统,通过一个或多个火焰探测器对火焰属性的存在或消失作出反应,并提供安全启动, safe operation, 在正常和异常条件下安全关闭燃烧器.
Flame Detector 是否有直接响应火焰特性的安全装置,通过火焰传感器来感知火焰的存在或消失.
Flame Failure Response Time 是从火焰熄灭开始到安全关闭阀断电结束的时间。.
Hardwired 是否为每个单独的信号或逻辑系统或逻辑系统之间的联锁提供专用互连.
Pressure Regulators 当设备供应压力超过燃烧器运行或设计参数或设备供应压力受波动影响时,应配置. 否则,自动流量控制阀应允许满足上述要求, provided it can compensate for the full range of
expected source pressure variations.
Regulators, relief valves, 并且开关应通风到符合下列标准的批准位置:
(1)重于空气的易燃气体在接触火源或重新进入建筑物之前,应将其排到建筑物外的一个位置,该气体在其LFL以下被稀释.
(2)通风口设计应防止水和昆虫进入,但不限制通风口的流量. PLCs.
如果用于燃烧安全服务,安全plc应具有以下特征:
(1)处理器和I/O应列出控制可靠服务,SIL评级至少为2.
(2)安全功能的进入应与非安全功能的进入分开.
(3)限制对专用于安全功能的PLC逻辑的访问,防止未经授权的更改.
(4)所有安全功能传感器和终件应独立于运行的传感器和终件.
PLCs shall not implement the following:
(1) Manual emergency switches
(2) Continuous vapor concentration high-limit controllers
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