Key operational points for the autoclave Key operational points for the autoclave
Shenjia Hydraulics
Release Date:
2022-08-15
An autoclave is a reactor operated under high pressure. Depending on process requirements, it can be either equipped with or without an agitator; the former features a structure identical to that of conventional agitated equipment.
A high-pressure reactor is a type of vessel operated under elevated pressure. Depending on process requirements, it may be equipped with or without an agitator; the former shares the same structural design as conventional stirred‑tank reactors. The key features of its construction are as follows: (1) The reactor body is a thick‑walled, high‑pressure cylindrical vessel. To withstand high temperatures and corrosion, it is typically fabricated from stainless steel, while the outer shell may be made of carbon steel or low‑alloy steel. Stainless steel can serve as the inner lining, either in the form of a clad plate or as an internal liner. (2) The vessel body generally does not have openings; all connecting pipes, nozzles, and auxiliary components are mounted on the vessel head. (3) The top of the vessel is fitted with a safety relief device, such as a safety valve, a rupture disc, or a combination of both.
What are the applications of autoclaves in the photovoltaic industry? Let’s take a brief look together.
As the photovoltaic industry continues to evolve, PV modules are no longer limited to power generation; they are increasingly endowed with a growing array of new functions. Particularly in building-integrated photovoltaics (BIPV), PV modules are often designed to serve as wall panels, roofing materials, translucent skylights, or shading roofs. Conventional PV modules encapsulated with tempered glass, EVA, TPT, and other materials cannot meet these requirements. Consequently, adopting large‑area double‑glass laminated PV modules—featuring tempered glass paired with PVB, crystalline silicon cells, thin‑film cells, and other materials—is becoming a prevailing trend. Building on this foundation, a wide variety of building‑material‑integrated PV modules will further emerge, making them a key focus of research and development for numerous PV module manufacturers.
As a pressing and forming device for manufacturing laminated safety glass, the autoclave boasts advantages such as high throughput, a high yield of qualified products, and excellent product quality, making it an indispensable piece of critical production equipment in the field of photovoltaic module encapsulation.
The autoclave consists of a vessel, a door, a circulation fan, a heater, a cooling system, and an electrical control cabinet, and serves as equipment for manufacturing PVB‑laminated glass. Through its temperature and pressure control system, the unit can operate in three distinct phases: heating and pressurization, holding at constant temperature and pressure, and cooling and depressurization. This process is well suited to the characteristics of PVB; by using this equipment to produce building‑integrated photovoltaic (BIPV) modules, not only can the aforementioned challenges be addressed and product quality and yield improved, but also mass production of multi‑specification BIPV modules can be achieved, thereby reducing the manufacturing costs of photovoltaic modules.
What are the key operational points for using an autoclave? Let’s take a brief look together.
1. Before turning on the current switch on the console, set both the stirring switch and the speed‑adjustment/heating switch to zero.
2. Before charging, rinse the inner walls of the autoclave, the agitator, and the sealing surfaces with the mother liquor, then carefully close the lid to avoid damaging the sealing surfaces.
3. When tightening screws, ensure proper alignment and use a torque wrench to tighten them symmetrically, preventing uneven stress. Do not fully tighten the screws at once; instead, gradually tighten them in a symmetrical sequence.
4. After the screws are tightened, first evacuate the reactor using a mechanical pump, then purge it with nitrogen two to four times to remove all air; subsequently, perform another evacuation and introduce hydrogen, start stirring, raise the temperature, and proceed with normal operation.
5. After the reaction is complete, stop stirring, evacuate the remaining hydrogen from the reactor, then purge with nitrogen, vent the system, and loosen the screw to take a sample.
The 6.5 L hydrogenation reactor is not resistant to strong acids; the use of hydrochloric acid, sulfuric acid, nitric acid, and other strong acids is prohibited in the reaction medium.
7. Near the hydrogenation reactor, work involving sparks and the use of studded shoes is strictly prohibited.
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