Method for measuring heat productivity of heating substance for calorimeter

Abstract

The invention discloses a method for measuring the calorific value of a heat-generating substance used in a calorimeter. The steps are as follows: (1) take an air-dried sample and place it in a crucible, place the sample-filled crucible on an oxygen bomb crucible support, install Ignition wire; add distilled water to the oxygen bomb, and fill the oxygen bomb with an appropriate amount of oxygen; (2) Add an appropriate amount of water to the inner barrel of the calorimeter, put the oxygen bomb into the inner barrel, and cover the lid; (3) Start the stirring of the inner barrel to make the temperature of the inner barrel reach the equilibrium T0, and control the temperature of the outer barrel of the calorimeter to ensure that the entire temperature rise curve of the inner barrel is located between the ambient temperature and the temperature section of the temperature control point of the outer barrel during operation; (4) Power on Ignite and read the temperature of the inner barrel continuously. When the actual temperature rise of the inner barrel is zero, the main period of the experiment is over; (5) Calculate the calorific value of the sample according to the temperature rise and cooling correction calculation results of the main period, as well as the sample weight and other parameters. The invention is a measurement method capable of improving cooling correction accuracy and adopting a unique working temperature curve.

Description

technical field [0001] The invention mainly relates to a measuring instrument used for measuring the calorific value of coal, oil or other exothermic substances in coal, petrochemical or electric power industries, in particular to a method for measuring the calorific value of exothermic substances used in calorimeters. Background technique [0002] The calorific value is measured in a closed container (commonly known as an oxygen bomb). In the presence of excess oxygen, an appropriate amount of sample is ignited and fully combusted, and the calorific value is calculated from the increase in water temperature. In order to obtain reliable measurement results and reduce the heat exchange (radiation or heat absorption) between the inner barrel of the oxygen bomb and the surrounding environment due to the temperature difference, in the prior art, an outer barrel is generally arranged outside the inner barrel, and the temperature of the outer barrel is controlled. To eliminate the...

AI Technical Summary

Problems solved by technology

Since the two-way working temperature curve is used in the main phase, the cooling model at the end of the test is relatively complicated, and it takes 5 minutes to complete the actual measurement

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