Coolant fluid cleaning method, system, and apparatus

A fluid cleaning system, comprising:

• (a) a dirty fluid receptacle having a fluid fill height, said dirty fluid receptacle being adapted and configured to receive, contain, and discharge, a fluid to be cleaned;
• (b) a rotating magnetic structure, and a magnetic field emanating from said magnetic structure, said magnetic structure being mounted relative to said fluid receptacle such that a lower portion of said magnetic structure extends below the fluid fill height and an upper portion of said magnetic structure extends above the fluid fill height, and wherein given portions of an outer surface of said magnetic structure rotate below and above the fluid fill height, and pick up and separates particulate material from such fluid, thereby to clean such fluid;
• (c) cleaning and discharge structure adapted to remove such particulate material from said magnetic structure, and to convey such particulate material away from said magnetic structure and out of said fluid cleaning system;
• and
• (d) a rotating filter communicating with such fluid in said dirty fluid receptacle so as to remove, by filtration, particulate material in such fluid,
• particulate material thus being removed from such fluid in said dirty fluid receptacle by both said magnetic rotating structure and said filter.

A fluid cleaning system, comprising:

• (a) a dirty fluid receptacle having a bottom inner surface, and a fluid fill height, said dirty fluid receptacle being adapted and configured to receive, contain, and discharge, a pool of such fluid to be cleaned;
• (b) discharge structure adapted and configured to remove particulate material which settles to the bottom inner surface of said dirty fluid receptacle, and to convey such particulate material toward a discharge from said fluid cleaning system;
• (c) a first rotating filter communicating with such fluid in said dirty fluid receptacle so as to remove, by filtration, particulate material in such dirty fluid, and to produce a first cleaned fluid downstream of said first rotating filter;
• (d) a second rotating filter communicating with one of such fluid in said dirty fluid receptacle and such first cleaned fluid downstream of said first rotating filter so as to produce a second cleaned fluid,
• said first and second rotating filters having differing screening capabilities such that one of such first and second cleaned fluids contains either less residual particulate matter by weight of smaller average size particles.

A method of cleaning a dirty fluid, comprising:

• (a) collecting a pool of the dirty fluid in a dirty fluid receptacle;
• (b) rotating a magnetic structure in the pool of dirty fluid such that given portions of an outer surface of the magnetic drum rotate below and above the pool of dirty liquid, and pick up and separate particulate material from the dirty fluid;
• (c) removing the picked-up particulate material from the outer surface of the magnetic structure and conveying the picked-up particulate material out of, and away from, the dirty fluid receptacle;
• and
• (d) passing fluid out of the dirty fluid receptacle through a rotating disc filter.