The plate heat exchanger installation is the actual installation of the plate heat exchanger at the place of use after the whole machine leaves the factory, and the pipeline is connected, and the plate heat exchanger enters the heat exchange system as a whole device. The plate heat exchanger assembly is to assemble the plate heat exchanger parts such as metal corrugated sheet, fixed plate, movable splint, splint bolt, section steel bracket into a plate heat exchanger. The assembly of plate heat exchanger is generally composed of plate heat exchanger The heater staff will do it.
Here, we mainly talk about the matters needing attention in the installation of the whole plate heat exchanger: Matters needing attention in the installation of the plate heat exchanger in the Ambote plate heat exchanger lecture hall.
1. After unpacking, carefully read the random documents (certificate of conformity, material certificate, flow chart, assembly drawing and packing list, etc.).
2. Before installing the plate heat exchanger, the basic quality inspection and acceptance work should be strictly carried out. The main items are as follows:
①The general surface of the foundation; the foundation elevation, plane position, shape and main dimensions and whether the reserved holes meet the actual requirements.
② Whether the position of the anchor bolt is correct, whether the thread condition is good, and whether the nut and washer are complete.
③Whether the base surface on which the horn is placed is flat, etc.
④The use of horns. After the foundation acceptance is completed, put a horn on the foundation before installing the heat exchanger, and level the surface of the foundation where the horn is placed so that the two can be in good contact. The thickness of the horn can be adjusted so that the heat exchanger can reach the designed level. After the horn is placed, the stability of the heat exchanger on the foundation can be increased, and its weight can be evenly transferred to the foundation through the horn. There should be pads on both sides of the anchor bolts, and the installation of the pads should not hinder the thermal expansion of the heat exchanger. After the heat exchanger is in place, it is necessary to level the heat exchanger with a leveler, so that each pipe can be connected to the pipeline without stress. After leveling, the inclined pad iron can be welded firmly with the support, but must not be welded to the flat pad iron or slide plate below.
3. The plate heat exchanger should be hoisted, and the plate heat exchanger should be installed vertically.
When hoisting, pay attention to the balance of the equipment, use hoisting holes, and the sling should not be hung on the pipe, positioning beam or plate. There should be enough space for maintenance at the installation site for observation and maintenance, and there should be a floor drain on the ground.
4. Clean the pipeline connected to it before installation.
To prevent debris such as sand, oil, welding slag, etc. from entering the plate heat exchanger, causing flow passage obstruction or damage to the plate.
5. Assembling the pipeline, considering the convenience of maintenance, it is easy to observe the working condition of the plate heat exchanger.
The heat exchanger is connected to the pipe with a short joint. Generally, a bleed valve should be installed on the pipeline connecting the upper corner hole. The connecting pipeline should be supported firmly, and the longer pipeline should have a gap at the turn to facilitate the expansion and contraction of cold and heat. A thermometer and a pressure gauge should be installed on the inlet and outlet pipes of the heat exchanger to observe its working conditions during operation.
6. If necessary, install a filter.
If sewage is used as a cooling medium or waste heat of recycled sewage or the medium contains granular solids, an appropriate type of automatic discharge filter or decontamination device should be installed upstream of the inlet end of the heat exchanger to avoid clogging the plate heat exchanger. When the possible pressure of the medium is greater than the operating pressure of the equipment, a pressure reducing valve and a safety valve should be installed at the inlet of the equipment.
7. Regarding the connection, it should be connected in the direction specified on the factory nameplate.
Under normal circumstances, the single process is the hot water side, the hot water enters from the upper port of the plate heat exchanger and is discharged from the lower port; on the cold water side, the cold water mainly enters from the lower port of the plate heat exchanger and is discharged from the upper port. This is done in order to reverse the flow direction of the hot and cold medium in the adjacent hot runners inside the plate heat exchanger, that is, "counter-flow" heat exchange, so that the cold and hot flow channels of the heat exchanger can always maintain a relatively balanced temperature difference during the heat transfer process. , in order to facilitate heat exchange. The multi-process plate heat exchanger needs to strictly follow the direction specified on the manufacturer's nameplate.
8. If the heat exchanger works above 100°C, the pipe connection must have an expansion absorption compensation device for thermal stress. For special cases, the tilting device is allowed to be fixed.
9. Check whether all clamping bolts are loose before putting into use.
Tighten if necessary. Check whether the heat exchanger is clamped to the specified clamping size range. If not, clamp it to the specified size first. Note: Do not over-tighten the clamping dimensions of the plate heat exchanger. The order of clamping is to clamp diagonally and simultaneously, and it is not possible to overclamp one side and then clamp the other side. This will lead to the deformation of the plate and the displacement of the gasket, and the heat exchanger is prone to internal leakage or external leakage after installation.
10. Pay attention to the opening and stopping sequence of the plate heat exchanger.
When starting up, first open the low-pressure side medium valve, and then slowly open the high-pressure side medium valve when the medium fills the plate heat exchanger channel; when shutting down, first close the high-pressure side medium valve, and then close the low-pressure side medium valve.