The present invention relates to a method for preparing an apparatus (or a plant comprising a plurality of apparatuses), for example a heat exchanger, a vaporizer or a distillation column, for use in a process (in particular a continuously operated process) for concentrating a mineral acid by evaporation of water, wherein the apparatus or the plant comprises (at least) a device which is resistant to the mineral acid and the device is flushed with an aqueous alkali metal hydroxide solution having a concentration by mass of alkali metal hydroxide in the range from 1% to 30% at a temperature in the range from 40° C. to 90° C. for a time of from 2 hours to 7 days.

The present invention relates to a method for preparing an apparatus (or a plant comprising a plurality of apparatuses), for example a heat exchanger, a vaporizer or a distillation column, for use in a process (in particular a continuously operated process) for concentrating a mineral acid by evaporation of water, wherein the apparatus or the plant comprises (at least) a device which is resistant to the mineral acid and the device is flushed with an aqueous alkali metal hydroxide solution having a concentration by mass of alkali metal hydroxide in the range from 1% to 30% at a temperature in the range from 40° C. to 90° C. for a time of from 2 hours to 7 days.

A method of cleaning an HVAC coil unit located above a drain basin. One step of the method involves providing a supply and collection assembly having a reservoir containing liquid cleaning solution, a pump operative to output the liquid cleaning solution through a supply outlet, and a vacuum source operative to draw in used liquid cleaning solution through a collection inlet. According to another step, a nozzle device in fluid communication with the supply outlet is also provided, the nozzle device having a delivery face. A further step involves providing a fluid return tool in fluid communication with the collection inlet, and positioning the fluid return tool in the drain basin. According to a further step, the delivery face of the nozzle device is moved across a surface of the HVAC coil unit to deliver the cleaning solution into areas between fins thereof.

A method of cleaning an HVAC coil unit located above a drain basin. One step of the method involves providing a supply and collection assembly having a reservoir containing liquid cleaning solution, a pump operative to output the liquid cleaning solution through a supply outlet, and a vacuum source operative to draw in used liquid cleaning solution through a collection inlet. According to another step, a nozzle device in fluid communication with the supply outlet is also provided, the nozzle device having a delivery face. A further step involves providing a fluid return tool in fluid communication with the collection inlet, and positioning the fluid return tool in the drain basin. According to a further step, the delivery face of the nozzle device is moved across a surface of the HVAC coil unit to deliver the cleaning solution into areas between fins thereof.

A method and an apparatus for cleaning a channel, especially a transmission and/or cooling channel, in any type of device, machine, installation, and/or tool, particularly in any type of heat exchanger and/or a molding core, cavity and/or insert is proposed, wherein a channel is cleaned through dynamic, bi-directional pulsation of cleaning medium inside the to-be-cleaned channel, the method being realized by a cleaning apparatus equipped with a diaphragm pump module, plugged either only in the feed side of the transmission line or in the feed side and in the return side, which, after connecting the diaphragm pump module to the external energy source and shutting off the flow control system from the reservoir and the feed pump, allows for putting cleaning medium into a state of two-way dynamic pulsating motion.

A method and an apparatus for cleaning a channel, especially a transmission and/or cooling channel, in any type of device, machine, installation, and/or tool, particularly in any type of heat exchanger and/or a molding core, cavity and/or insert is proposed, wherein a channel is cleaned through dynamic, bi-directional pulsation of cleaning medium inside the to-be-cleaned channel, the method being realized by a cleaning apparatus equipped with a diaphragm pump module, plugged either only in the feed side of the transmission line or in the feed side and in the return side, which, after connecting the diaphragm pump module to the external energy source and shutting off the flow control system from the reservoir and the feed pump, allows for putting cleaning medium into a state of two-way dynamic pulsating motion.

The present disclosure relates to a method and apparatus for cleaning a 3D printed article, in particular a 3D printed heat exchanger. After 3D printing, an article may have internal passages formed from bonded powder and said passages may contain unbonded powder that needs to be removed before further use of/processing of the article. To remove this unbonded powder, the article is filled with a cleaning fluid and vibrated. The cleaning fluid is then pumped out of the article and past a sensor that generates a magnetic field. The sensor detects the presence of powder particles in the fluid by detecting a perturbation of the magnetic field caused by said particles. The fluid is then filtered and returned to a reservoir for use. The sensor may indicate the article is sufficiently clean when a detected concentration of particles in the fluid drops below a threshold.

The present disclosure relates to a method and apparatus for cleaning a 3D printed article, in particular a 3D printed heat exchanger. After 3D printing, an article may have internal passages formed from bonded powder and said passages may contain unbonded powder that needs to be removed before further use of/processing of the article. To remove this unbonded powder, the article is filled with a cleaning fluid and vibrated. The cleaning fluid is then pumped out of the article and past a sensor that generates a magnetic field. The sensor detects the presence of powder particles in the fluid by detecting a perturbation of the magnetic field caused by said particles. The fluid is then filtered and returned to a reservoir for use. The sensor may indicate the article is sufficiently clean when a detected concentration of particles in the fluid drops below a threshold.

A process for chemical cleaning and corrosion inhibition of pipework, typically in closed loop systems, that avoids or significantly minimises the requirement for wastewater discharge where the system is first acidified using a mixture of cleaning agents capable of dissolving metal oxides. The method then precipitates any dissolved contaminants and separates the precipitate from the carrying fluid. Further elements of a combined corrosion inhibitor package are then added to any cleaning agent ions that remain in solution to develop a fully functional corrosion inhibition package to protect the metals of the system.

A process for augmenting energy in a dryer used in processing is disclosed. The process includes providing a source of syrup having concentrated solids. They syrup is then directed through a syrup line to a recirculation pump where it is recirculated to a heat exchanger having a source of heat delivered thereto. The syrup is heated to a temperature above a flash point of the syrup. The heated syrup is delivered to a flash tank and water vapor is flashed off and then directed through a vent and into a dryer. Cooled syrup remaining in the flash tank is delivered through a cooled liquid line to the syrup line to repeat the process. The delivery of water vapor to the dryer results in an additional source of energy being transferred to the dryer.