Antiscale devices may be delivered both with provision of installation works and without it. In the latter case, the installation is carried out by Customer's qualified personnel according to detailed instructions provided.
The instructions are included in «Acoustic-T» device delivery package.
For installation photos of «Acoustic-T» device on heat exchange equipment, see Photogallery.
In most cases, ultrasonic vibrations from transducers to a heat exchange surface is transmitted via a welded joint. Welding quality largely defines ultrasound passing degree; presence of cavities and slurry inclusions may significantly decrease efficiency of «Acoustic-T» devices.
In case of high-quality welding, magnetostrictive transducers welded to the outer side of the heat exchanger (tube sheets, collectors or wall tubes) smoothly transmit induced high-frequency mechanical vibrations of the heat exchange surface which spread with underdampening by the entire heat exchange surface. Contrary to alternative methods, the ultrasonic technique has the advantage of reduced scale formation rate independently of chemical composition and consumption of water (or any other heated fluid).
Ultrasound transducers are welded to the most heat-stressed parts of the equipment - side and rear wall collectors, boiler drums, and tube sheets of shell-and-tube heat exchangers. Welding is performed by electrodes ОСТ-12 (3mm cross-section).
Installation of ultrasound transducers on plate heat exchangers
Transducers designed for plate heat exchangers are made with a special barrel-shaped tip. These barrels are tied in heated (cold) water input and/or output headers as close as possible to the heat exchanger. For this purpose, prior to tie-in, elliptic barrel-sized holes are cut by a gas burner in the headers on-the-spot.
Transducers must not be installed vertically, with the transducer pointed upwards, because in this position, an air cushion beneath the barrel bottom may occur; no ultrasound would pass through this cushion, and the efficiency of antiscale devices would be nullified.
Installation of ultrasound transducers on shell-and-tube heat exchangers
Ultrasound transducers are welded to the tube sheet rim of shell-and-tube heat exchangers. But not to return band flanges! In those cases, when the tube sheet is countersunk in the heat exchanger case, the transducer is updated for a narrow and long tip. Transducer updating technology is described in the Annex to the Instruction.
Installation of ultrasound transducers to boilers (water heating, steam, TDWTR) and other equipment.
For water heating boilers, transducers are welded to collectors and/or input and output flanges of the headers. Caution! To header flanges of the boiler, but not to the delivery piping!
Ultrasound generator fixture
The generator is fixed to a wall or a bearing structure with metal brackets (vendor furnished). It is fixed as follows:
- Remove the generator's lid
- In each through hole in the corners of the generator case, insert a M4x20 screw
- Fix brackets on the rear wall of the generator
- Fix brackets to the bearing structure (dowel, screw, welding)
Feeding voltage (220+20V, 50Hz) is supplied by PPVZ3x1.5 or PPV2x1.5 wire with mandatory grounding connection to EU socket grounding terminal (the generator is grounded via a three-core power supply cable). The cable is 20-25m long, connected to EU socket with mandatory grounding. The generator is grounded via a 3-pin plug of the power cable. Power socket is installed on an insulating support (vendor furnished).
Voltage phase has a 16A circuit breaker (vendor furnished). Use of a phase supplying motors or other electrical equipment is not recommended.
Starting generator without ultrasound transducers connected is prohibited!
Connection cables are laid in electrical conduits and connected to ultrasound transducers (transducers) welded to the heat exchange equipment. «Acoustic-T» antiscale devices is supplied with cables already connected to the generator.
«Acoustic-T» device is operated by voltage below 1,000V. To maintain the device, only personnel briefed on safety rules and authorized for operations with low voltage (below 1,000V) electronic equipment is allowed.