Total sulfur reaction furnace temperature control device and method

Abstract

The invention provides a total sulfur reaction furnace temperature control device which comprises a first temperature sensor, a data display instrument, a relay and a PLC programmable controller. The signal output end of the first temperature sensor is electrically connected with the data display instrument. The switching value output port of the data display instrument is electrically connected with the switching value input port of the PLC programmable controller. The output port of the PLC programmable controller is connected with the coil of the relay. An alternating current power supply is electrically connected with a heating resistance wire in a reaction furnace through the normally open contact of the relay. A hole parallel to the hearth is arranged at 2 to 3 cm from the center of the furnace core end face of the reaction furnace. The deepest part of the hole is set as a sampling point. The first temperature sensor is fixedly arranged at the sampling point. The first temperature sensor is used to measure the temperature of the sampling point. The invention further provides a total sulfur reaction furnace temperature control method. The device and the method can accurately control the temperature of the reaction furnace, and can be widely used in the field of hydrogen sulfide analyzers.

Description

technical field [0001] The invention relates to a temperature control device and method for a total sulfur reaction furnace, and belongs to the technical field of temperature control for a total sulfur reaction furnace. Background technique [0002] The hydrogen sulfide analyzer generally measures the concentration of hydrogen sulfide in the sample gas by the lead acetate paper strip method, which is an important basis for process operators to judge the sulfur content of the net gas. It takes about one month to replace the catalyst. The catalyst is 150,000 yuan per ton, and the total loss is 4.2 tons, and the direct economic loss is 630,000 yuan. Therefore, its accuracy is very important. The specific principle of the hydrogen sulfide analyzer is as follows: when a constant flow of gas sample flows over the paper tape soaked in lead acetate, the hydrogen sulfide in the sample gas reacts with lead acetate to produce lead sulfide brown Spots, the reaction formula is: H2S+PbAC...

AI Technical Summary

Problems solved by technology

[0004] In summary, the temperature control system of the total sulfur reactor in the prior art has the following problems: 1. The temperature control is inaccurate, the temperature cannot be accurately measured, and the furnace temperature cannot be accurately controlled; 2. The temperature control switch is easily damaged. As a result, the furnace temperature required for the total sulfur reaction cannot be accurately controlled; 3. The contacts at the output end of the solid state relay are stuck, causing the power supply circuit to continuously heat the electric furnace wire, and the continuous heating causes the electric furnace wire to be damaged

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