Combination particulate and acid-neutralizing filter

A filter apparatus for use in removing acids and impurities contained in a fluid comprising:

• a housing having an inlet and an outlet, the housing comprising a canister and an end plate, the canister having an open end and a generally cylindrical sidewall therebetween, the end plate being secured to the open end, the end plate providing the inlet and the outlet;
• a first particulate filter contained in the housing;
• an acid-neutralizing filter contained in the housing, the acid-neutralizing filter comprising a media container having an imperforate outer side wall surrounding an acid-neutralizing compound, said acid-neutralizing filter being arranged in fluidic parallel with the first particulate filter, and a second particulate filter arranged downstream of the acid-neutralizing compound fluidically between the acid-neutralizing compound and the outlet to prevent particles of acid-neutralizing compound from reaching the outlet;
• and
• a conduit contained in the housing, the conduit including a pressure reduction section;
• wherein the pressure reduction section is arranged to create a pressure differential across the acid-neutralizing filter such that a portion of the fluid to be filtered by the filter apparatus passes through the acid-neutralizing filter.

A filter apparatus for use in removing impurities and acids contained in a fluid by filtration comprising:

• a housing having an inlet and an outlet;
• a particulate filter, the housing comprising a canister and an end plate, the canister having an open end and a generally cylindrical sidewall therebetween, the end plate being secured to the open end, the end plate providing the inlet and the outlet;
• an acid-neutralizing filter in fluidic parallel with the first particulate filter, the acid-neutralizing filter comprising a media container having an imperforate outer side wall surrounding an acid-neutralizing compound and a second particulate filter, the second particulate filter arranged downstream of the acid-neutralizing compound fluidically between the compound and the outlet to prevent particles of acid-neutralizing compound from reaching the outlet;
• and
• a conduit which includes a pressure reduction section in the form of a venturi, the conduit including at least one passageway through a wall of the conduit at the venturi;
• whereby the filter apparatus is arranged such that:
• (a) the fluid to be filtered by the filter apparatus flows into the housing;
• (b) less than 100% of the fluid entering the housing passes through the particulate filter;
• (c) wherein the fluid entering the apparatus and not passing through the particulate filter is drawn through the acid-neutralizing filter;
• and
• (d) wherein the fluid drawn through the acid-neutralizing filter flows into the conduit and mixes with the fluid filtered by the particulate filter.

A filter apparatus for use in removing acids and impurities contained in a fluid by filtration comprising:

• a housing having an inlet and an outlet, the housing comprising a canister and an end plate, the canister having an open end and a generally cylindrical sidewall therebetween, the end plate being secured to the open end, the end plate providing the inlet and the outlet;
• a first particulate filter contained in the housing, the housing and the particulate filter arranged such that from about 90% to about 97% of the fluid to be filtered by the filter apparatus passes through the first particulate filter;
• an acid-neutralizing filter arranged in fluidic parallel with the first particulate filter such that about 3% to about 10% of the fluid to be filtered by the filter apparatus passes through the acid-neutralizing filter, the acid-neutralizing filter comprising a media container having an imperforate outer side wall surrounding an acid-neutralizing compound, and a second particulate filter arranged downstream of the acid-neutralizing compound fluidically between the compound and the outlet to prevent particles of acid-neutralizing compound from reaching the outlet;
• and
• a base plate comprising a threaded central passage and one or more ports.

A filter apparatus for use in removing acids and impurities contained in a fluid comprising:

• a housing having an inlet and an outlet, the housing comprising a canister and an end plate, the canister having an open end and a generally cylindrical sidewall therebetween, the end plate being secured to the open end, the end plate providing the inlet and the outlet;
• a first particulate filter contained in the housing;
• an acid-neutralizing filter contained in the housing and arranged in fluidic parallel with the first particulate filter, the acid-neutralizing filter comprising a media container having an outer sidewall surrounding an acid-neutralizing compound and a second particulate filter, the second particulate filter arranged downstream of the acid-neutralizing compound fluidically between the acid-neutralizing compound and the outlet to prevent particles of acid-neutralizing compound from reaching the outlet;
• and
• a conduit contained in the housing for connecting the first particulate filter to the outlet, the conduit including a pressure reduction section arranged to create a pressure differential across the acid-neutralizing filter such that a portion of the fluid to be filtered by the filter apparatus passes through the acid-neutralizing filter, the pressure reduction section having at least one passageway formed therein in fluidic connection with the second particulate filter, the second particulate filter being disposed around the pressure reduction section of the conduit over said at least one passageway.

A filter apparatus for use in removing acids and impurities contained in a fluid comprising:

• a housing having an inlet and an outlet, the housing comprising a canister and an end plate, the canister having an open end and a generally cylindrical sidewall therebetween, the end plate being secured to the open end, the end plate providing the inlet and the outlet;
• an acid-neutralizing bed contained in the housing comprising a media container having an outer side wall surrounding acid-neutralizing media particles;
• a first flow path for fluid running through the housing from the inlet to the outlet, the first flow path running through the acid-neutralizing bed and then through a first particulate filter downstream of the acid-neutralizing bed such that acid-neutralizing media particles are prevented from reaching the outlet when fluid flows from along the first flow path from the inlet to the outlet;
• a second flow path for fluid running through the housing from the inlet to the outlet, the second flow path running through a second particulate filter and bypassing the acid-neutralizing bed;
• and
• a conduit disposed in the second flow path for fluidically connecting the second particulate filter to the outlet and having a pressure reduction section for deriving a suctioning force from fluid flowing along the second flow path and for suctioning fluid along the first flow path, the first particulate filter being mounted around the pressure reduction section over at least one passageway formed in the pressure reduction section.

A filter apparatus for use in removing acids and impurities contained in a fluid comprising:

• a housing having an inlet and an outlet, the housing comprising a canister and an end plate, the canister having an open end and a generally cylindrical sidewall therebetween, the end plate being secured to the open end, the end plate providing the inlet and the outlet;
• a first particulate filter contained in the housing;
• a conduit contained in the housing and disposed to fluidically connect the first particulate filter to the outlet, the conduit including a pressure reduction section;
• and
• an acid-neutralizing filter contained in the housing and arranged in fluidic parallel with the first particulate filter, the acid-neutralizing filter comprising a media container having an outer sidewall surrounding an acid-neutralizing compound and a second particulate filter arranged downstream of the acid-neutralizing compound to prevent particles of acid-neutralizing compound from reaching the outlet, the second particulate filter being disposed around the pressure reduction section over at least one passage way formed in the pressure reduction section such that the pressure reduction section creates a pressure differential across the acid-neutralizing filter.

A filter apparatus for use in removing acids in a fluid comprising:

• a housing having an inlet and an outlet;
• an acid-neutralizing filter contained in the housing, the acid-neutralizing filter comprising a media container having an outer sidewall surrounding an acid-neutralizing compound;
• a conduit having a surface for contacting the fluid, the surface having an axial length, and the conduit being contained in the housing;
• a particulate filter arranged downstream of the acid-neutralizing compound fluidically between the acid-neutralizing compound and the outlet, the particulate filter disposed around the conduit and having a particulate filter axial length that is shorter than the conduit surface axial length;
• and
• the conduit including a pressure reduction section arranged to create a pressure differential across the acid-neutralizing filter and the conduit including at least one passageway in the pressure reduction section.