Quick screening calorimeterIt is a professional testing instrument used to evaluate the thermal stability, reaction heat effect, and potential hazards of substances, widely used in the fields of chemical engineering, medicine, materials science, and scientific research. Its core function is to quickly assess the thermal hazard of a substance by monitoring the temperature and pressure changes of the sample in real-time under heating or constant temperature conditions, analyzing heat release and pressure generation data.
This instrument adopts advanced thermocouple sensors and high-precision pressure measurement devices, supporting multiple temperature scanning modes (such as isothermal, scanning, and step modes). The temperature control range is usually from room temperature to 400 ℃, and the temperature resolution can reach 0.001 ℃ to 0.01 ℃. The pressure range covers 0 to 20MPa, which can meet different experimental needs. Its dual channel design can simultaneously test multiple samples (including reference samples), significantly improving testing efficiency and accuracy. The single experiment time can be shortened to 30 minutes to 2 hours, far superior to traditional adiabatic calorimetry.
Quick screening calorimeterThe components mainly include the following aspects:
1. Sample pool: used to place samples to be tested, usually with a certain capacity and specific materials to meet the testing needs of different types of samples, and to ensure good isolation of the samples from the external environment during the testing process.
2. Heating system: Generally composed of heating rods or heating blocks, it can heat the sample at a set rate to reach a predetermined temperature condition, causing physical or chemical changes in the sample and releasing heat.
3. Temperature sensors, such as thermocouples, are used to monitor the temperature changes of samples in the sample pool in real time. By accurately measuring temperature, the temperature time curve of the sample during heating can be obtained, providing key data for subsequent analysis and calculation.
4. Pressure sensor: Some rapid screening calorimeters are equipped with pressure sensors to monitor the pressure changes of the sample during the reaction process. For reactions that may produce gas or volume changes, pressure sensors can provide important information to help determine the severity and safety of the reaction.
5. Furnace body: provides a relatively enclosed testing environment for the sample, reducing the interference of external factors on the test results. The furnace body usually has good insulation performance to ensure temperature stability and uniformity during the testing process.
6. Temperature control system: responsible for controlling the heating rate and temperature of the heating system, accurately adjusting the heating power according to the experimental parameters, and conducting temperature rise or constant temperature testing on the sample according to the predetermined conditions.
7. Data acquisition and processing system: including data acquisition cards, computer software, etc. The data acquisition card is responsible for collecting signals from temperature sensors, pressure sensors, etc., and converting them into digital signals to transmit to the computer. Computer software analyzes and processes the collected data, generates temperature time curves, pressure time curves, etc., and calculates the thermodynamic parameters of the sample, such as reaction initiation temperature, exothermic temperature rise, specific heat release, etc.
8. Safety devices: such as over temperature alarm devices, over pressure alarm devices, automatic furnace cover locking devices, etc. When the temperature or pressure exceeds the set safe range during the testing process, the alarm device will promptly sound an alarm to remind the operator to take corresponding measures; The automatic locking device for the furnace cover can prevent accidental opening of the furnace cover when the pressure or temperature inside the furnace has not reached the safe range, ensuring the safety of the operators.