A self cleaning filtering method and apparatus for a plate heat exchanger including: a suction pipe, centrally disposed within an inlet channel adapted for receiving a cooling medium therein for the plate heat exchanger; nozzles extending radially from, and in fluid communication with, the suction pipe, the nozzles spaced apart from each other; a low pressure chamber, external to the heat exchanger, abutting the pressure plate, the low pressure chamber in fluid communication with the inlet channel, and a section of the suction pipe extending into the low pressure chamber; a drain valve adapted to reversibly open a drain of the low pressure chamber; and a rotation mechanism controlling axial rotation of the suction pipe.

Devices and methods are provided for in-line water treatment using strong magnetic fields to influence corrosion, separate toxins, suppress bacteria and bio-fouling, as well as inhibit or greatly reduce mineral scaling due to fluid flow in or around equipment components. For example, a device is provided for applying a magnetic field to a portion of tubing through which a fluid flow, such as water, is conveyed. The device includes a number of links joined together via detachable pivoting connections, such that links may be removed and/or links may be added, thereby allowing a diameter of the device to be adjusted so as to accommodate larger or smaller piping, as necessary, for retrofitting applications. The use of magnetic treatment of fluids such as water may allow extended cycles of operation with higher concentration of mineral salts without the use of chemical scaling suppressants.

Devices and methods are provided for in-line water treatment using strong magnetic fields to influence corrosion, separate toxins, suppress bacteria and bio-fouling, as well as inhibit or greatly reduce mineral scaling due to fluid flow in or around equipment components. For example, a device is provided for applying a magnetic field to a portion of tubing through which a fluid flow, such as water, is conveyed. The device includes a number of links joined together via detachable pivoting connections, such that links may be removed and/or links may be added, thereby allowing a diameter of the device to be adjusted so as to accommodate larger or smaller piping, as necessary, for retrofitting applications. The use of magnetic treatment of fluids such as water may allow extended cycles of operation with higher concentration of mineral salts without the use of chemical scaling suppressants.

A radiator screen device for a construction machine, an agricultural machine, or an industrial vehicle, each having a vehicle body and a radiator, includes a screen to filter dust contained in cooling air flowing toward the radiator, and a dust removing member disposed upstream of the radiator with respect to a flowing direction of cooling air and movable relative to the screen in contact with a surface of the screen to remove dust attached to the screen. The dust removing member and the screen are supported by the vehicle body. One of the dust removing member and the screen is vibrated relative to the other of the dust removing member and the screen by vibration of the vehicle body.

A radiator screen device for a construction machine, an agricultural machine, or an industrial vehicle, each having a vehicle body and a radiator, includes a screen to filter dust contained in cooling air flowing toward the radiator, and a dust removing member disposed upstream of the radiator with respect to a flowing direction of cooling air and movable relative to the screen in contact with a surface of the screen to remove dust attached to the screen. The dust removing member and the screen are supported by the vehicle body. One of the dust removing member and the screen is vibrated relative to the other of the dust removing member and the screen by vibration of the vehicle body.

A cooling tower tray. The cooling tower tray has a base with a first end, second end, and opposing sides. Multiple sidewalls attached to the base and extending upwards from the first end, second end, and opposing sides. The sidewalls and base form an interior volume with an open upper end. One or more of the sidewalls are a perforated sidewall with multiple apertures. A filter rests within the interior volume. Some embodiments have a handle attached to a sidewall.

A cooling tower tray. The cooling tower tray has a base with a first end, second end, and opposing sides. Multiple sidewalls attached to the base and extending upwards from the first end, second end, and opposing sides. The sidewalls and base form an interior volume with an open upper end. One or more of the sidewalls are a perforated sidewall with multiple apertures. A filter rests within the interior volume. Some embodiments have a handle attached to a sidewall.

A method for controlling water chemistry in a power generation plant including a low-pressure feedwater heater (18), a deaerator (19), and a high-pressure feedwater heater (20) disposed sequentially along a feedwater pipe (16) from a condenser (15) to a steam generator or a boiler (11) to control the chemistry of feedwater guided to the steam generator or the boiler includes the steps of: injecting an oxidant through an oxidant injection line (31) into feedwater flowing through the feedwater pipe disposed downstream of the condenser in such a way that a dissolved oxygen concentration in the feedwater ranges from 3 to 100 ppb while the feedwater is maintained to be neutral to form an oxide film on surfaces of the feedwater pipe, the low-pressure feedwater heater, the deaerator, the high-pressure feedwater heater, and other structural members that come into contact with the feedwater; and injecting a deoxidant through a deoxidant injection line (35) into the feedwater flowing through the feedwater pipe disposed downstream of the deaerator in such a way that the dissolved oxygen concentration in the feedwater flowing into the steam generator or the boiler lowers to 5 ppb or lower.

A method for controlling water chemistry in a power generation plant including a low-pressure feedwater heater (18), a deaerator (19), and a high-pressure feedwater heater (20) disposed sequentially along a feedwater pipe (16) from a condenser (15) to a steam generator or a boiler (11) to control the chemistry of feedwater guided to the steam generator or the boiler includes the steps of: injecting an oxidant through an oxidant injection line (31) into feedwater flowing through the feedwater pipe disposed downstream of the condenser in such a way that a dissolved oxygen concentration in the feedwater ranges from 3 to 100 ppb while the feedwater is maintained to be neutral to form an oxide film on surfaces of the feedwater pipe, the low-pressure feedwater heater, the deaerator, the high-pressure feedwater heater, and other structural members that come into contact with the feedwater; and injecting a deoxidant through a deoxidant injection line (35) into the feedwater flowing through the feedwater pipe disposed downstream of the deaerator in such a way that the dissolved oxygen concentration in the feedwater flowing into the steam generator or the boiler lowers to 5 ppb or lower.

A heat exchanger (10) for arrangement inside a service-liquid tank (12), in particular inside a motor-vehicle service-liquid tank (12), comprising: a heat-exchanger liquid reservoir (14) for receiving a supply of liquid (22), an electric heating device (20) which is constructed and arranged for the transfer of heat into the heat-exchanger liquid reservoir (14), and a heat-exchanger line (24) which originates at least from the heat-exchanger liquid reservoir (14) and which is designed for the transfer of heat from the liquid flowing in the heat-exchanger line (24) to an area (26) outside the heat-exchanger line (24), characterized in that the heat-exchanger line (24), as a circulation line, discharges into the heat-exchanger liquid reservoir (14).