物料输送系统中的干雾抑尘应用

在钢铁冶炼企业的矿石、烧结原料、煤炭燃料等物料的输送系统中，粉尘产生一直是长期令人困扰的问题，国家也为此出台了专门控制粉尘的法规条例。为解决粉尘问题，很多种粉尘控制方法和设备被投入使用，如：电除尘、湿电除尘、水雾除尘、喷淋除尘、布袋除尘、负压除尘等。

近年来，因考虑到设备投入、使用成本以及出差方法对现场环境的影响，又出现了干雾抑尘应用。机械设备类的除尘，因设备投运费用大、能耗高、且占地面积大，无法在某些特殊空间使用，而水雾/喷淋除尘又会因用水量大造成水资源浪费并导致现场环境脏乱的原因，所以干雾抑尘的优点逐渐显露，并在近几年大量投入使用。

干雾抑尘，主要是通过特制的双流体雾化喷嘴，将多个喷嘴集合在一起使用，产生30μm以内的超细水雾颗粒，利用雾滴的扩散特性，使物料输送中产生的细微粉尘与水雾颗粒结合，使其受重力下落以便收集，防止微细粉尘扩散至空气中。

对于某些对干雾逸散距离有需求的场合，则需要多个喷嘴集成在一个或多个喷雾集管上，利用水雾结合射程变远的特点，达到增加喷雾距离的目的。

Dry fog dust suppression in material handling production line

Dust generation has long been a problem in the transport systems of ore, sintered raw materials, coal fuel and other materials in iron and steel smelters, and national regulations have been introduced to control dust. To solve the dust problem, many different dust control methods and equipment have been put into use, such as: electric dedusting, wet electric dedusting, water mist dedusting, spray dedusting, bag dedusting, negative pressure dedusting, etc.

In recent years, the application of dry fog dust suppression has emerged in consideration of equipment input, usage costs and the impact of travel methods on the site environment. Mechanical equipment type dust removal, because of the equipment operation costs, high energy consumption, and a large area, can not be used in some special space, and water fog / spray dust removal will be due to the large amount of water caused by the waste of water resources and lead to a dirty site environment, so the advantages of dry fog dust suppression gradually revealed, and in recent years a lot of use.

Dry fog dust suppression, mainly through a special air atomizing spray nozzle, a collection of multiple nozzles used together to produce ultra-fine water mist particles within 30μm, using the diffusion characteristics of the droplets, so that the fine dust generated in the material transport combined with the water mist particles, so that they fall by gravity in order to collect, to prevent the spread of fine dust into the air.

For certain applications where dry fog fugitive distances are required, multiple nozzles are integrated into one or more spray manifolds to take advantage of the combination of water mist with a longer range to achieve increased spray distances.