永久总外壳(PTE)

100% VOC捕获

永久总外壳 (PTEs) are a highly effective way to prevent fugitive process emissions from entering the atmosphere. 通过完全包围发射源, the process emissions can be minimized and concentrated for more cost effective destruction in a VOC control device. PTEs can be effective for new or pre-existing systems and are used in a wide variety of applications especially when a toxic environment risks the health of your employees.

永久总外壳(PTE) Design Criteria – EPA Method 204

A 永久总外壳(PTE) surrounds a production device to capture up to 100% of fugitive air pollutants within the enclosure. An enclosure may qualify as a PTE by following these criteria:

Areas of openings: The total area for all natural draft openings shall not exceed 5% of the surface area of the enclosure’s four walls, 地板和天花板.
Flow rate into enclosure: The average facial velocity (FV) of air through all NDOs shall be at least 3,600m/h (200 ft/min – this equates to a negative pressure difference of 0.(水柱直径007英寸). The direction of air flow through all NDOs must be into the enclosure. Access door/windows: All access doors and windows whose areas are not included in item 2 are not included in the calculation in item 4 shall be closed during routine operation of the process. Emission capture: All VOC emissions must be captured and contained for discharge through a control device.

PTE安装的优点

S&SE designs meet VOC abatement requirements set by the EPA, state and local authorities VOC emission capture up to 100% with properly designed PTE Installation Targets specific process emissions that must be treated, minimizing ambient air dilution Reduces capital investment and operation costs by decreasing concentrated air volume Reduces air volume that requires abatement Less natural gas consumption Capture hood and floor sweeps Completely surrounds the source of emission Prevents fugitive emissions from entering the atmosphere Improves the work environment.

在船 & Shore Environmental we focus on each facility’s unique process design to attain a superior solution based on needs and available space. 18bet官网可以使用现有的永久墙, 条窗帘, 保温墙板, and/or other materials to meet installation budgets. Our experienced engineering team will work with the plant personnel to map each VOC emission source and identify the best location for collection, 其中可能包括通风柜和扫地机的设计.

S&SE provides custom designed 永久总外壳 (PTE) for a wide variety of applications. as a part of turnkey oxidizer installation project or upgrading of existing system. In the United States regulations require overall VOC control systems to maintain 90% efficiency or more for many industries. 对于许多应用扫地 & capture hoods are not sufficient tools to achieve this level of control. A state-of-the-art VOC control system such as a PTE is required to meet federal & 国家规定.

以下五个标准, 由EPA根据测试方法204建立, 必须满足的附件资格作为PTE.

Any natural draft opening (NDO) shall be at least 4 equivalent opening diameters from each VOC emitting source. An equivalent diameter is equal to the diameter of circle that has the same area as the opening. The total area of combined NDO’s shall not exceed 5% of the total surface area of the enclosure including the 地板和天花板.
The average face velocity (FV) of air through the NDO’s shall be at least 200 ft/min and the direction of flow shall be into the enclosure. All access doors and windows not included as NDOs shall be closed during routine operation of the process. All exhaust gases from the enclosure must be directed to a control device.

*Most state and local regulatory agencies have adopted these criteria as a basis for PTE design.