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Eng. Chemistry

 

This page lists the topics on applications of chemistry in Industrial Ventilation and Dust Collection fields.

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What you have to know when applying blast gate damper

  Introduction A damper is a device that adjusts the volume of airflow passing through the outlet, inlet or duct. By proper adjustment of all dampers in a system, a desired distribution of airflows in all the branches can be obtained, while minimizing the total airflow of the system to save energy— this is also termed air balancing. The most common dampers used in industrial ventilation and dust collection systems to balance airflows are slide gate dampers (The slide gate, also called “blast gate or cut-off” damper). In a slide gate damper (see Figure 1 of a straight flat slide gate damper), the slide is inserted perpendicular to the flow. Figure 1 A sample of straight flat slide gate damper As the gate is sliding into the duct, it will add resistance to the airflow and consequently reduce the volume of airflow, while increasing airflows in all other branches. Withdrawing the gate has the reverse effect on that branch and all the others in a system. Interaction between a fan ...

Push-pull ventilation system for open surface tank saves air flow

  Three sections in this blog: Push-pull ventilation system and its advantages Disadvantages of general ventilation and side exhaust systems Methods to design a push-pull ventilation system Push-pull ventilation system and its advantages Open surface tanks used in industrial processes often need ventilating to remove harmful pollutants (vapors, fumes or aerosols) from the working environment. One method of removing pollutants is the so-called side push-pull ventilation system, in which a jet of air is blown (or pushed) from one side of the tank and collected (or pulled) by an exhaust hood on the opposite parallel side. This system is particularly useful for large tanks where access requirements preclude the use of an overhead canopy, and the size of the tank makes side (or rim) exhaust systems prohibitively expensive. Most agree that a push-pull ventilation system can yield air savings of up to 50% compared to a side suction only hood. An illustration of a push-pull system for an o...

Baghouse Dye Test for leak detection

  We did a Dye test for a customer in a newly installed baghouse. In this standard dye test procedure, green fluorescent dye powder was applied. No leaks were found in the clean plenum of the baghouse. All the bags were properly installed and no breach between the clean air and dirty air plenums was found either. View of Clean Plenum after Dye applied Per the request of our customer, we also got inside the dirty side of the baghouse through the inspection door on the hopper and visually checked dye powder distribution on the bags. From the picture below, it is apparent that the dye powder evenly distributed on all the bags, which means that the airflow was evenly distributed too. Customer was very happy about this visual check. Bottom View of Bags after Dye Applied