Equipment and method for measuring heat value of material through oxygen consumption method

Abstract

The invention relates to a device and method for measuring a material heat value through an oxygen consumption method, and relates to the technical field of measuring equipment, the device comprises a testing machine shell and a main control device arranged in the testing machine shell, the testing machine shell is internally provided with a testing cavity, and one end of the testing cavity is provided with a window pushing assembly and a sealing module; the sealing part is used for maintaining the testing cavity in a sealed state; the air outlet end of the air charging module is communicated with the test cavity, and the air charging module is used for charging air into the test cavity; the heating module is arranged in the test cavity and is used for placing materials and fully combusting the materials; the parameter measurement module is arranged on the test cavity and is used for measuring the pressure, the temperature and the oxygen concentration value in the test cavity before and after the material is burnt; automatic measurement operation is more convenient, different from a traditional mode of measuring the heat value of the material through a hydrothermal method, the heat value is measured by measuring the oxygen concentration change and the temperature and pressure change after the material is fully burnt, and the measurement precision is more accurate.

Description

technical field [0001] The invention belongs to the technical field of measuring equipment, and in particular relates to a device and a method for measuring the calorific value of materials by an oxygen consumption method. Background technique [0002] In the prior art, hydrothermal method is mostly used to measure the calorific value of objects, and the working principle of hydrothermal method equipment is to measure the calorific value of combustible substances. , so that the sample is completely burned, and the heat released by the combustion is absorbed by the oxygen bomb and a certain amount of water (inner tube water) around it, and the temperature rise of the water is proportional to the heat released by the combustion of the sample. The heat capacity of the calorimeter is pre-calibrated under the specified conditions. When the calorific value is to be measured, as long as the measurement is carried out in strict accordance with the conditions for the calibration of t...

AI Technical Summary

Problems solved by technology

In the constant temperature calorimetry system, since the temperature of the water in the outer cylinder changes with the change of the indoor temperature, and there is actually heat exchange between the inner cylinder and the outer cylinder, these heat exchanges need to be corrected by an appropriate model, while the hydrothermal method There are some disadvantages in the method of measuring calorific value. For example, after the material is burned, the heat is transferred to the water in the water tank. The water in the water tank exchanges heat with the surrounding equipment and loses heat. This part of the lost heat cannot be accurately calculated and measured to measure the heat generated by combustion. , affecting the measurement accuracy;

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