초록 ▼

A portable test device for evaluating the effectiveness of different filtering media, preferably metallic filtering media, in removing particulates from the gas stream of an exhaust stack at temperatures between about 300°F. and about 1500°F., including a probe member insertable directly into the ga

A portable test device for evaluating the effectiveness of different filtering media, preferably metallic filtering media, in removing particulates from the gas stream of an exhaust stack at temperatures between about 300°F. and about 1500°F., including a probe member insertable directly into the gas stream of the exhaust stack and a particulate filtering facility in which the metallic filtering media to be tested are positioned. Facilities are provided for the isokinetic sampling and passing of the sample stream withdrawn by the probe member from the probe member to and through the particulate filtering facility while maintaining the temperature thereof substantially at the temperature it had within the exhaust stack. Facilities are also provided which permit the metallic filtering media to be readily replaced by different metallic filtering media to permit comparisons of filtering effectiveness. Also included are downstream particulate removal means which remove all particulates not earlier filtered by the metallic filtering media, to permit the total particulate content of the gas stream to be analyzed.

대표청구항 ▼

A device for evaluating the effectiveness of selected metallic high temperature filtering media using a gas stream from the same exhaust stack and at a temperature at which said filtering media will be commercially used, comprising: a probe member insertable into said gas stream to withdraw a gas sa

A device for evaluating the effectiveness of selected metallic high temperature filtering media using a gas stream from the same exhaust stack and at a temperature at which said filtering media will be commercially used, comprising: a probe member insertable into said gas stream to withdraw a gas sample therefrom, said gas stream having an established temperature between about 300°F. and about 1500°F. and containing a quantity of particulates therein; a gas sample transfer means connected at one end to said probe member for transferring said gas sample from said probe member, said gas sample transfer means including a temperature control means for maintaining said gas sample substantially at said established temperature; a particulate filtering means connected to said gas sample transfer means to receive said gas sample and filter portions of said quantity of particulates therefrom; said particulate filtering means including selected metallic high temperature filtering media to be evaluated, a means for holding said selected metallic high temperature filtering media in the path of said gas sample, means for maintaining said gas stream and said selected metallic high temperature filtering media substantially at said established temperature, and an access means for permitting said selected metallic high temperature filtering media to be conveniently replaced with other selected metallic high temperature filtering media within said holding means to permit a comparison of the effectiveness of different selected metallic high temperature filtering media; and a first means for measuring said established temperature within said exhaust stack, and wherein said temperature control means comprises a second means for measuring the temperature within said particulate filtering means, and a heating means for controlling the temperature within said particulate filtering means in response to the signal from said first and second measuring means.