Paint booth application

For the paint solvent application, a slipstream of a paint booth vent located at Fort Carson was analyzed to determine the components present with rapid scan gas chromatograph. On any operational day, several paint types are sprayed. The solvent emissions content thus varies during painting operations. In general, the amounts and types of solvent emissions from the Fort Carson paint booth are listed in Table 22.4.2. 

To clearly understand the relative importance of this element in the system safety order of precedence, consider the following example. An entrepreneur wishes to establish a small manufacturing facility that will be involved in the production of school desks. Part of the finishing process will require the application of several coats of lacquer to each desk surface. An enamel-based paint will also be used on the understructure of each desk. The facility will have only one small open-faced paint booth. Ventilation will be provided, and the operator will be supplied with respiratory protection in the form of disposable respirators. However, during the design phase, a system safety evaluation of the painting process required the identification... 

For applications where the exhaust stream contains aromatics, alkenes, CO and oxygenated compounds, RCO 6000 is preferred (Fig. 7.21). This catalyst can operate at temperatures as low as 350°C, has excellent thermal stability and can also be regenerated with washing. RCO 6000 has been successfully used in automotive applications (paint booths and oven processes). 

Applications include comfort, dilution, man cooling, paint-spray-booth extract, etc. 

The increasing demand for solvent-free paints led to the introduction of water-based paints. Both in the production and in the application of this type of paint quite often a water-paint waste mixture results. Two examples are leftovers, diluted with (cleaning) water and water used in water curtains in spray booths, which becomes increasingly contaminated with paint. Using ceramic membranes with pore sizes of 0.1 micron [35], it is possible to concentrate the paint particles to a very high degree (35-65% dry matter) and at the same time produce an effluent containing less than 0.1% paint. This can be... 

Design an emission control plant for 50,000 scfm of vent gas at 100°F and 25% relative humidity for 99% removal. The plant is located in Dearborn, Michigan, and the paint spray booths operate on a single 12-hour shift per day. Include the necessary start-up controls. The available fuel is natural gas or oil. Calculate the capital and operating cost and the /lb or ton of VOC removed. Compare the three processes and recommend which is most suitable for this application. 

Precautions during the application of paint depend on the methods of application and curing used. Minimizing contact with solvent vapour requires air extraction spray operations will be carried out in spray booths where contaminated air and excess spray droplets are treated. For some materials such as isocyanates, spray operators may be required to wear air-fed hoods. Factory environments are now regulated for all emissions including vapours, dusts and liquid and solid wastes, and these must be monitored and controlled. 

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