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Some microcomputer automatic calorimeters also have an external bobbin temperature control system and an external cylinder water temperature zone system that can keep the temperature of the entire calorimeter system and the external bobbin water temperature within a very small range.
2. The principle of microcomputer automatic calorimeter The current national production calorimeter is mostly thermostatic. The working principle is generally to put the oxygen bomb loaded with the coal sample and oxygenated to the specified pressure into the inner cylinder to start the water circulation, so that the water temperature is stable, then the water is injected into the inner cylinder, and after the predetermined amount of water is reached, stirring is started to balance the water temperature of the inner cylinder to At a certain temperature, the temperature probe detects the water temperature and records it in the computer. After the water temperature of the inner cylinder is stable, the control system indicates ignition ignition, and the coal sample rapidly burns under the combustion of oxygen. The heat generated is transmitted to the inner cylinder through the oxygen bomb, so that the inner cylinder temperature rises. When all the heat in the oxygen bomb is released, the temperature begins to drop. After the computer detects the drop in the water temperature of the inner cylinder, it is determined that the test of the sample is over. The system stops stirring and releases the inner cylinder water. The computer processes the result of the collected temperature data.
However, some microcomputer automatic calorimeters use pre-calibrated mathematical models to predict end-point temperatures based on temperature velocities over a period of time. Calculating the calorific value through data processing programs in software shortens the test cycle.
The calorimeter's structure and working principle 1. Calorimeter structure The calorimeter system consists of a printer, a computer, an inner cylinder, an oxygen bomb, a temperature sensor, an agitator, an ignition device, an outer cylinder, a temperature measurement and control system, and water. The host of the microcomputer automatic calorimeter is generally composed of a casing, an inner cylinder, an outer cylinder, a stirrer, a backup water tank, a control circuit, a temperature sensor, an ignition electrode, a water circulation system, and the like.