Device and method for measuring ammonia escape content in flue gas and ammonia escape content in smoke dust simultaneously

Abstract

The invention relates to a device and method for measuring ammonia escape content in flue gas and ammonia escape content in smoke dust simultaneously. At present, no device and method which are accurate in measurement and capable of measuring ammonia escape content in flue gas and ammonia escape content in smoke dust simultaneously exist. The device is characterized in that one end of an air guide pipe is connected with one end of a sampling pipe, the other end of an absorption liquid supply pipe is connected with the air guide pipe, one end of a first air guide branch pipe and one end of a second air guide branch pipe are both connected with the other end of the air guide pipe, the other end of the first air guide branch pipe is connected with a first condensation cylinder, the other end of the second air guide branch pipe is connected with a second condensation cylinder, and an analyzer and a flowmeter are both connected with a single-chip microcomputer. The method comprises the steps that the first condensation cylinder and the second condensation cylinder conduct sampling alternately in sequence, the analyzer conducts analysis, the ammonia content in sampled flue gas is obtained, the flowmeter conducts measurement, the volume of the sampled flue gas is obtained, and thereby the ammonia escape concentration in the sampled flue gas is obtained. The device and method for measuring the ammonia escape content in the flue gas and the ammonia escape content in the smoke dust simultaneously are accurate in measurement, and the ammonia content in the flue gas and the ammonia escape content in the smoke dust can be measured simultaneously.

Description

technical field [0001] The invention relates to a device and method for simultaneously testing ammonia escape concentration in flue gas and smoke dust, mainly used for high-precision measurement of gaseous ammonia at the outlet of a denitrification reactor and total ammonia escape concentration adsorbed in smoke dust, and belongs to the technical field of environmental protection testing. Background technique [0002] At present and in the foreseeable future, thermal power generation is still the main power supply mode in my country, but a large amount of nitrogen oxides NOx produced in the process of coal-fired power generation seriously damages the natural environment on which we live. With the continuous improvement of people's environmental awareness, NOx control technology is widely used. In recent years, my country's thermal power plants have carried out large-scale centralized transformation of denitrification devices. At present, the denitrification processes of therm...

AI Technical Summary

Problems solved by technology

[0005] (1) The working environment of the transmitting end and the receiving end is harsh, and the service life of the prisms at the transmitting end and the receiving end is severely shortened due to high dust and high temperature, which directly increases the maintenance cost of related equipment;

[0006] (2) Due to the irregular vibration of the flue, the alignment of the transmitting end and the receiving end cannot be guaranteed for a long time, and the instrument cannot continuously transmit effective data;

[0007] (3) The instrument cannot be calibrated and calibrated frequently, and the measurement accuracy cannot be guaranteed;

[0008] (4) The smoke concentration in the flue is very high, which seriously affects the penetration distance of the laser in the flue, and the measurement deviation increases;

[0009] (5) The test location is limited to the corner of the flue, which cannot effectively reflect the ammonia escape concentration of the flue section

[0011] To sum up, there is currently no device and method that is accurate and capable of simultaneously testing the ammonia escape content in flue gas and flue dust

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