SU1176224A1 - Automatic analyser of mixture component concentration - Google Patents

Abstract

AUTOMATIC ANALYZER OF THE COMPONENT CONCENTRATION IN A MIXTURE, containing a heat exchanger, on the inlet and outlet pipes of which thermopiles are installed, a reaction chamber equipped with first and second thermal sensors at its two inputs, an actuator and a measuring device that is different in that, in order to analyze accuracy A computational unit, an extremal controller, an additional thermopile, and a numeric indicator are entered into it, while the inputs of the computational unit are connected to the thermopile heat exchangers, and output - with a measuring device; the input of the extremal controller is connected to the output of an additional thermopile, the therms S of which are installed on the reaction chamber in the zone of maximum (L reaction temperature increment and on one of the inputs to the reaction chamber, the output of the extreme regulator is connected to an actuator, and the first and second temperature sensors are connected in a differential circuit and connected to a zero-in: p; catator.

Description

1 The invention relates to a physicochemical analysis of substances and can be used to control the concentration of a component in a liquid medium capable of selectively reacting with the titrant. The aim of the invention is to improve the accuracy of the analysis. The drawing shows a diagram of the proposed device. The device contains heat exchangers 1, the inlet and outlet nozzles of which are equipped with thermal sensors 2 and 3 of the first thermal bath and thermal sensors 4 and 5 of the second thermal battery, a computing unit 6, the inputs of which are connected to the thermal batteries of the heat exchanger 1, and an output with a measuring device 7. Device It also contains a reaction chamber 8, the first and second terminals 9 and 10 are connected to the inlet ports of the rotary tube, connected in a differential circuit and connected to the null indicator 11 Devices contain additional mobatareyu, sensor 12 which is mounted on one of the inputs into the reaction chamber 8, and the sensor 13 is mounted on the reaction chamber in the zone of the maximum growth tempera stages, wherein temperature sensors are connected to a differential circuit. The output of the additional thermopile is connected to the inlet of the extreme regulator 14, the output of which is connected to the actuator 15. Between the outlet of the heat exchanger 1 and the inlet of the reaction chamber 8 there is a thermostat 16 for equalizing the temperatures of the streams entering the reaction chamber 8. The analyzer works as follows. A reagent with a known concentration — a titrant — is fed to one inlet of the heat exchanger 1, and a reagent is fed to the second inlet, the concentration of which is to be measured. Since the reagents at the entrance to the heat exchanger have a different temperature, when passing through the heat exchanger 1 they exchange heat, and each reagent gets a temperature increment in accordance with the identity 1p, St dtj 242 where t, ha2 are the mass consumption of the reagents; C "C- - specific heat capacity; at, & t are the temperature increments of the reactants in the heat exchange process. Thermal sensors 2 and 3 of the first thermopile measure the temperature increment (dt) of the reagent whose concentration is to be measured, and thermal sensors 4 and 5 of the second thermopile measure the temperature increment (itj) of the titrant. The signals from the corresponding reagents in the form of thermoelectromotive forces (TECs) 4E and LE, which are inversely proportional to the costs of the corresponding reactants, are fed to the corresponding inputs of the computing unit 6, which performs the operation of dividing these TECs according to the formula v ha2С L where from the chemical structure of the reagents. The output signal from the computing unit 6, proportional to the ratio of the costs of reagents, is fed to the input of the secondary device 7, the scale of which is calibrated as a percentage of the concentration of the measured component. The reagent and titrant after the heat exchanger 1 enter the thermostat 16, in which the temperature equalization takes place. The temperature equalization of the flows after the thermostat 16 is controlled using a differential thermopile with thermal sensors 9 and 10 and a null indicator 11. The reagent and titrant with the same temperature enter the reaction chamber 8, in which they are mixed with a selective reaction between the analyzed reagent and the titrant . The temperature increment of this reaction is measured with the aid of thermal sensors 12 and 13 of an additional thermopile connected by its output to an extreme controller 14, which searches for the maximum increment of the reaction temperature, in; I act on the consumption of one of the reagents using one of the following: t1.one mohani: ma 15.

311762244

In the process of thermochemical titration, under the condition that the concentration is constant, the stent and metric ratio of the titrant concentration.

reagent consumption, determined by pa. It allows to calibrate the maximum temperature increment, the measure of the ratio of reagents in the reaction, uniquely corresponds to 5 percent of the concentration of the analyzed

concentration of the analyzed component.

Claims (1)

AUTOMATIC COMPONENT CONCENTRATION ANALYZER IN A MIXTURE, containing a heat exchanger, on the inlet and outlet nozzles of which there are thermal batteries, a reaction chamber equipped with the first and second temperature sensors at its two inputs, an actuator and a measuring device, characterized in that, in order to increase the accuracy of analysis, a computational unit, an extreme regulator, an additional thermal battery and a zero indicator are introduced, while the inputs of the computing unit are connected to the heat exchangers of the heat exchanger, and the output to and measuring device, the input of the extreme controller is connected to the output of the additional thermal battery, the temperature sensors of which are installed on the reaction chamber in the zone of maximum increase in the reaction temperature and at one of the inputs to the reaction chamber, the output of the extreme controller is connected to the actuator, and the first and second temperature sensors are connected by a differential circuit and connected to the .null indicator. „„ SU „„ 1176224