Urgent! Selection of various instruments
Thread Content
Dear experts, I need to build a setup consisting of a high-temperature, high-pressure container containing a solution. The desired temperature is 200°C, and the pressure might reach 20 MPa. The container needs to be equipped with a temperature sensor, a pressure sensor, as well as a valve that can release pressure. Since I’m not very familiar with this area, I would like to know what kind of temperature and pressure transmitters and valves I should use. These devices should be able to display the temperature and pressure values on my computer, and it should also be possible to control the pressure using those devices. Thank you very much
Based on the existing industrial equipment provided by the poster, I believe that initially you will need 1 control valve, 1 safety valve, 2 transmitters, 1 temperature sensor along with a PID controller in order to regulate pressure and temperature. If necessary, we can get in touch and discuss potential solutions together
200 kilograms of pressure is quite high; it’s better to choose an imported pressure transmitter
Why such high pressure for a mere reaction? It can’t be synthetic ammonia, right?
Please provide a table showing the corrosivity of the solution. The simplest setup consists of a safety valve and a burst disc; no control is needed – they will rupture when the pressure reaches a certain level. In addition, there’s a pressure transmitter, a temperature transmitter, and a recorder. If control is required, it depends on what needs to be controlled: if feeding is to be controlled, then temperature is relevant; if venting is to be controlled, then pressure is important. . . .
The pressure involved for the original poster is indeed very high. If the diameter of such a pressure relief valve were slightly larger, its cost would be quite substantial! Electric valves have too long a response time; solenoid valves require too large a pressure difference, and although such valves are available in Chongqing, China, their price is extremely high. Pneumatic valves, on the other hand, require an air supply. We have a client whose system operates at 15 MPa, and since there was an existing compressed air supply on site, pneumatic valves were chosen, which results in a much lower cost. As for the computer-based display and control mentioned by the original poster, that’s not a problem at all; alerts, databases, and various operational functions can also be integrated. If you need further information, feel free to contact me! QQ: 709274284
It is displayed on the computer to indicate whether it is a DCS system or a PLC system. Self-acting valve for pressure control. It is best to use imported temperature and pressure transmitters. It is advisable to use a thermometer sleeve for temperature measurement inside the device. I wonder what heat source controls the temperature and pressure regulation? The process conditions should be more detailed.