Method and device for automatic determination of lime activity by temperature-increasing method

Abstract

The invention relates to a method and a device for automatic determination of lime activity by a temperature-increasing method; the device comprises a support, a stirrer, a digester, a temperature sensor, a temperature display recorder, a digestion table, and a water-bath heater. The digester and a digester cover have a heat insulation and preservation structure. The determination comprises the following steps: (1) accurately weighing 100 g of samples with a particle size of 0-3.5 mm; (2) measuing 400 ml of water, adding the water into the digester, heating to 25 DEG C; (3) adding the sample into the digester, digesting, recording the temperature change of the digestion reaction; (4) displaying the temperature and a change curve of the temperature with time by the recorder; (5) determining the result, that is, obtaining the change curve of the temperature with time displayed at real time on the touch display screen after the digestion reaction begins, and determining the difference value between the highest temperature of the digestion reaction and an initial temperature. According to the invention, the temperature sensor is connected with the temperature display recorder, and thus the automatic operation of lime activity determination is realized; the determination speed is increased; the accuracy of the lime activity determination is improved with an error controlled to be within 1%; automatic control of the test and multifunctional analysis of the test data are realized by the temperature display recorder.

Description

technical field [0001] The invention belongs to the technical field of performance measurement of chemical materials, and relates to a method and a device for measuring the activity of lime, in particular to a method and a device for automatically measuring the activity of lime by a temperature rise method Background technique [0002] The water activity of lime is an important index to test the quality of lime. Lime reacts with water to form calcium hydroxide, commonly known as slaked lime, and this reaction is also known as the digestion reaction of lime and water. The speed of digestion reaction between lime and water is the main method to characterize the activity of lime. [0003] There are two methods for the determination of lime activity in the world, one is the hydrochloric acid titration method, and the other is the temperature rise method. The basic measurement principle and reaction process of the hydrochloric acid titration method are as follows: after the act...

AI Technical Summary

Problems solved by technology

[0007] Both methods are used to measure lime activity by manual operation. The disadvantages are: 1. There are many human factors and large errors in the detection process, and the accuracy of the activity measurement results is low.

Second, the degree of automation is low, and the labor intensity of operators is high

3. It is not convenient to display and observe the temperature change of lime digestion reaction

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