A chemical liquid purification apparatus includes a tank body, a return tube, a liquid sending pump, a filtration device and a piping. The tank body has a liquid passage port and a circulation port communicated to a storage space inside the tank body. The return tube has one end connected to the circulation port and another end extending to the storage space. The liquid sending pump and the filtration device are located outside the tank body in between the liquid passage port and the circulation port. The piping is connecting the liquid sending pump and the filtration device to the liquid passage port and the circulation port.

A system and method for regulating and absorbing TFT-LCD organic solvent waste liquid in countercurrent are provided. In the system, each of longitudinal offset pipes of absorbing pipes is disposed between a lower filter plate and an upper filter plate, bottom positions of the longitudinal offset pipes are connected with a sinking-recovery pipe, each longitudinal offset pipe is provided with a photoelectric detector, an activated carbon supply pipe is provided with an activated carbon supply device, the sinking-recovery pipe is connected with a solid-liquid separator, and a wet activated carbon conduction mechanism is provided with a heating-separating device. Activated carbon particles in the absorbing pipe with a certain saturation amount are led out in a non-disassembly-replacement method, the saturated activated carbon is subjected to solid-liquid separating and heating degassing, thus the saturated organic solvent is separated and recovered and the activated carbon particles are recycled.

A broom vacuum cleaner for cleaning swimming pools including a main body, pumping means, a suction head and an upstream filter, placed inside the main body and upstream of the pumping means, the suction brush includes a downstream filter placed outside the main body and downstream of the pumping means, and the upstream and downstream filters are coaxial.

A broom vacuum cleaner for cleaning swimming pools including a main body, pumping means, a suction head and an upstream filter, placed inside the main body and upstream of the pumping means, the suction brush includes a downstream filter placed outside the main body and downstream of the pumping means, and the upstream and downstream filters are coaxial.

A filter assembly comprises an outer casing, filters and a pipe member connected to first, second and third filters and comprising an inlet flow path and an outlet flow path. The inlet flow path comprises a first inlet flow path connected to the first filter, a second inlet flow path connected to the second filter, a third inlet flow path connected to the third filter, and an inflow member comprising a branch point to allow water to flow in parallel through the first inlet flow path and the second inlet flow path. The outlet flow path comprises a first outlet flow path for water to be discharged from the first filter, and a second outlet flow path for water to be discharged from the second filter. Water discharged from the first outlet flow path from the second outlet flow path is guided and introduced into the third inlet flow path.

A filter assembly comprises an outer casing, filters and a pipe member connected to first, second and third filters and comprising an inlet flow path and an outlet flow path. The inlet flow path comprises a first inlet flow path connected to the first filter, a second inlet flow path connected to the second filter, a third inlet flow path connected to the third filter, and an inflow member comprising a branch point to allow water to flow in parallel through the first inlet flow path and the second inlet flow path. The outlet flow path comprises a first outlet flow path for water to be discharged from the first filter, and a second outlet flow path for water to be discharged from the second filter. Water discharged from the first outlet flow path from the second outlet flow path is guided and introduced into the third inlet flow path.

A complete fuel tank maintenance and cleaning system. This apparatus and method are capable of effectively cleaning an underground or aboveground storage tank by implementing a multi-stage filtration and removal system, and effectively removing contaminants from tank surfaces by using the product or alternative as a streamed cleaning agent within the storage tank.

A complete fuel tank maintenance and cleaning system. This apparatus and method are capable of effectively cleaning an underground or aboveground storage tank by implementing a multi-stage filtration and removal system, and effectively removing contaminants from tank surfaces by using the product or alternative as a streamed cleaning agent within the storage tank.

A filter assembly includes a filter element and a filter housing. The filter housing includes a shell defining an inner cavity, and a lid configured to engage the shell at an opening of the inner cavity. The filter element is disposed within the inner cavity and includes a media pack, a first endplate, and a sealing member. The first endplate is sealingly engaged with a media pack first end and includes a skirt extending along a longitudinal axis of the media pack from the first end toward the second end. The sealing member is coupled to the skirt and is positioned between and forms a seal between the lid and the shell.

Inside a tank body storing a liquid, a return filter is provided protruding downward from an upper surface of the tank body, and a substantially plate-like (plate-shaped) float is also provided that is inserted into the tank body and floats in accordance with change in a liquid surface of the liquid stored in the tank body. The float is provided with an opening larger than a diameter of a filter case, and in a plan view, the float is disposed between the tank body and the filter case.