Apparatus and method for simultaneously monitoring sulfur dioxide and nitric oxide gas concentration by using diode laser

Abstract

The invention relates to an apparatus and a method for simultaneously monitoring sulfur dioxide and nitric oxide gas concentration by using a diode laser, and simultaneously relates to the apparatus and the method for simultaneously monitoring sulfur dioxide and nitric oxide gas concentration, and is the apparatus and the method for simultaneously monitoring sulfur dioxide and nitric oxide gas concentration with high measurement precision and stable performance, the apparatus comprises a signal generator, a temperature and current controller, a laser, a collimating lens, a beam splitter, a detector, a data collection card, a dichroic mirror, a sum frequency crystal and a computer; the method comprises the following steps: the sawtooth current drives the diode laser to output laser; the beam splitter divides the laser into two beams, wherein one beam of light enables incidence to gas to be measured to obtain a first group of data; the short wave light beam and long wave light beam are processed with the sum frequency and then enable incidence to gas to be measured to obtain another group of data; and the concentration of the gas to be measured can be obtained by analysis through the computer. The invention is the apparatus and the method for simultaneously monitoring sulfur dioxide and nitric oxide gas concentration.

Description

technical field [0001] The invention relates to a device and a method for simultaneously monitoring the gas concentrations of sulfur dioxide and nitrogen monoxide. Background technique [0002] With the development of the economy, sulfur dioxide and nitrogen oxides discharged into the air continue to increase, and the total emissions of sulfur dioxide and nitrogen oxides in my country have exceeded 20 million tons. As the main cause of acid rain, industrial sulfur dioxide emissions account for more than 80% of the country's total sulfur dioxide emissions. Controlling industrial sulfur dioxide emissions is of great significance for reducing sulfur dioxide emissions and reducing the harm of acid rain. With the rapid growth of my country's energy consumption and the number of motor vehicles, nitrogen oxide emissions have also risen rapidly. The increase in nitrogen oxide emissions has caused my country's acid rain pollution to change from sulfuric acid to sulfuric acid and nitr...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of the current lack of devices and methods for simultaneously monitoring the concentration of sulfur dioxide and nitrogen monoxide gas with high measurement accuracy and stable performance, and to provide a device and method for simultaneously monitoring the gas concentration of sulfur dioxide and nitrogen monoxide using a diode laser. method

Images