2022年7月22日

谷物设施的尘埃爆炸保护产品

With so many options, what is the best choice for any given application?

来源:Rembe

Explosive atmospheres usually occur in process engineering equipment such as filters, silos, elevators, mixers and mills.

In the event of internal or external ignition sources,爆炸可以在设备内部开发并在整个连接组件中传播。

爆炸保护旨在减少爆炸的影响,是正确保护过程的最有效方法。

The explosion protective measures include conventional explosion venting using explosion vents, flameless venting, explosion isolation, and chemical suppression. With so many options, what is the best choice for a given application? Here are a few examples of how and when to apply these protection devices.

图1 REMBE爆炸通风口002
REMBE爆炸通风孔的形状和结构取决于应用程序。

示例1:过滤器/Dust Collectors

爆炸的风险在过滤系统中特别高。非常细的灰尘悬挂在过滤器中,如果存在点火源,则可能触发爆炸。位于户外的过滤器通常受到爆炸通风口的保护。

In the event of an explosion, the vent opens at a designed set pressure. This releases the explosion outward and reduces the pressure build-up inside the vessel.

As no two processes are identical, there are various types of explosion vents that differ in terms of shape, material, temperature rating, and pressure/vacuum resistance. Even hygienically demanding processes can be protected nowadays with certified hygienic explosion vents.

If there are walkways, driveways, equipment, or buildings in the direction of the explosion blast, an add-on module such as the REMBEtargo通风can be used.

Targo通风将爆炸式通风口的开头限制为指导爆炸压力,火焰和加热。这样,危险区域现在位于爆炸面板上方,植物人员和财产在面板下方是安全的。

图2带有targo通风口的REMBE爆炸通风口EGV
REMBE® EGV Explosion vent with TARGO-VENT diverter

室内过滤器也可以通过连接到通风管的爆炸板保护,该爆炸管安全地导致爆炸安全。另外,无火的通风是保护室内过滤器的经济和有效解决方案。不同的制造商使用各种技术进行无火的通风。

REMBE, the inventor of flameless venting, offers three different products:q-rohr,Q-BoxQ球.

无火的通风孔可与特殊的金属网络一起使用,从而吸收爆炸的热能,从而熄灭火焰并确保没有热颗粒逃脱无火的通风口。随后的压力和噪声水平也降低到可接受且无害的最小值。

图3 REMBE烈火排气Q框002
Q-Box
图3 REMBE无火排气Q rohr
q-rohr
Fig 3 REMBE Flameless Venting Q Ball 002
Q球

In addition to the special stainless-steel mesh filter, the Q-Rohr, Q-Box and Q-Ball consist of an explosion vent with an integrated burst indicator.

该信号可以连锁到控制系统,以便在通风孔打开时关闭过程。无火的通风是用于较小量应用(<100m³)的化学抑制设备的一个很好的替代方法,尤其是在维护成本方面。

示例2:喷雾烘干机

无论是在食品,化学或制药行业中,喷雾干燥机自然都会在整个容器中干燥时都有悬浮的灰尘云。最常见的点火源是发光的余烬,旋转喷嘴的损坏以及由于失衡而导致的热轴承或火花。这种尘埃云加上这些潜在的点火资源,造成了众所周知的行业危害。

With that being said, it’s important to protect yourself from “overengineering." The protection measure that makes sense for your plant depends on the volume of the spray dryer to be protected, its respective installation site, and strength.

如果容器离外墙太远,则喷雾干燥机通常用通风管或无火的通风管或无火通风口保护。另外,连接管道通常是隔离的。目的是防止压力和火焰的传播,从而保护连接的设备,例如流体床,旋风和过滤器。

图4 EGV HYP 002
REMBE®EGV-HYP爆炸通风口用于卫生应用。

The REMBE EGV-HYP and ERO explosion vents can be used in these hygienically demanding processes. The EGV-HYP panel features a full surface, tapered sealing system that fits flush with the interior of the explosion vent and prevents cross contamination.

此外,通常包括绝缘材料,因此爆炸面板不会变成冷点并引起凝结。EGV-HYP甚至可以弯曲以匹配喷雾干燥机的半径,从而消除任何平坦的表面。这些功能使其与CIP过程兼容,以确保面板保持卫生过程。

示例3:ElevatorsConveyors

各种输送机都有各种通风选择。由于功能性和基于设计的条件,电梯代表了特殊的危险来源。传达大量(可燃)散装材料会带来爆炸的高风险。

与前面提到的设备一样,如果爆炸可以释放到安全区域,室外电梯和输送机通常会受到爆炸通风孔的保护。或者,REMBEQ-Box or Q-Ball flameless vents can be used indoors or in outdoor areas near personnel and other equipment. A combination of conventional and flameless venting can be the right safety concept depending on the conditions at the installation site.

一些电梯很高,因此Rembe为这些名为Everatorex的应用开发了一个全面的保护系统。

这是针对电梯的第一个类型测试的完整保护系统,是所有类型电梯的合适解决方案。它结合了常规排气,无火的通风和爆炸抑制技术的优势。

图5 REMBE熄灭屏障Q BIC
REMBEQ-Bic extinguishing barrier

Example 4:筒仓

在爆炸保护方面,筒仓是关键的植物组件。在填充过程中会形成爆炸性的尘埃空气混合物,并将灰尘悬挂在较大体积中。如果不能排除所有潜在的点火源,则必须保护和隔离筒仓。

室外孤岛通常用爆炸通风口排气 - 可以根据填充过程的类型使用不同的类型。REMBE®可以在半圆形和梯形形状中创建我们的EGV面板的修改版本。这些可以适合由于箱通风口和其他管道工作而可能有限的房地产的孤岛。如果筒仓在室内,则可以与排气管或REMBE一起使用爆炸通风口®可以利用Q-Box/Q-RoHR无火的通风孔。

最后的想法

Explosion protection measures can only be safe and economical if the entire system is analyzed and individual protective measures are coordinated. This requires a systematic approach as well as observance of system-specific boundary conditions and knowledge of methods for assessing safety-related parameters.

REMBE可以通过我们的工程方法和大量产品来帮助确定这种最佳保护系统。这样可以确保您使用经过测试和经过验证的设备为每个应用程序保持安全。

关于Rembe Inc.
For over 45 years, REMBE has been and continues to be a leader in the innovation and manufacture of high-quality process safety systems, explosion protection systems and dynamic weighing systems.

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