A technical field

This utility model relates to the technical field of ozone concentration analysis after ozone flue gas denitrification, particularly to a residual ozone concentration analysis system for ozone flue gas denitrification.

2、 Background technology

The basic principle of odorous flue gas gasification denitrification technology is the odorous ammonia gasification method, which mainly utilizes the strong gasification of odorous argon for denitrification

Sex oxidizes insoluble low valence nitrogen oxides into soluble high valence nitrogen oxides, and then absorbs the nitrogen oxides in the washing tower to achieve the purpose of removal.

The oxidation mechanism of NO in the process of simultaneous desulfurization and denitrification with ozone was studied. Comprehensive simulation experiments were conducted on the injection, gas distribution, gas phase mixing, temperature control, and dust effects of ozone in the flue. The detailed chemical reaction mechanism between O3 and NOX in smoke was summarized, which is relatively complex. In practical experiments, the key reaction between ozone and NO under low temperature conditions can be studied. The key reaction between 03 and NO under low temperature conditions is as follows:;

NO+Q3 → NO2+2 NO+3 → N02+2+3 → N3+2N03+N2 → N205 2NQ+2=2N24N2+02+2H2=4HN3 and its bulk chemical substances with gas-phase electricity such as C SO pen phase: NOY

It can be quickly ammoniated by odorous ammonia, which makes the ozone oxidation of NOX highly selective. Because NOX in the gas phase is converted into ionic compounds that dissolve in dry aqueous solution, this makes the oxidation reaction more efficientfullyThus, it irreversibly removes NOX without generating secondary pollution. After oxidation reaction, the added ozone is consumed by the reaction, and excess ozone can be decomposed in the spray tower. In addition to NOX, some heavy metals such as mercury and other heavy metal pollutants are also oxidized by ozone, and high concentrations of dust or solid particles in flue gas will not affect the removal efficiency of NOX.

3、 Overview

The residual odor concentration analysis system after denitrification with dry odor flue gas includes:; Primary flue gas oil separator, dual path electronic cooler, negative pressure automatic drainage device, primary flue gas oil separator, odor concentration analyzer, odor exhaust disruptor, negative pressure suction pump

(Brushless motor). This system is equipped with a flue gas pretreatment device, and the entire process is in a negative pressure sampling state, effectively removing water and impurities from the flue gas and efficiently reducing the temperature of flue gas sampling. The odorous ammonia concentration analyzer has the function of automatic zero calibration

The system can achieve 24-hour continuous operation and adjust the concentration and output of the front-end odor ammonia generator in real time based on the residual odor ammonia concentration after flue gas odor ammonia denitrification, effectively avoiding the problems of high escape concentration and excessive emissions after flue gas odor ammonia denitrification.

4、 Product Features

(1) The gas composition in flue gas is very complex. The ozone concentration analyzer used in this process is a UV absorption method light pool odor analyzer. However, the UV absorption method ozone analyzer does not allow the entry of humid and dusty gases. Therefore, this ozone concentration detection system needs to be equipped with

Pre processing function: The range of the ultraviolet ozone concentration analyzer is 0-100PPM or 0-1000PPM. The ozone concentration analyzer should have the function of automatic zero calibration, which can automatically calibrate the zero point in real time to ensure the stability of the zero point and the accuracy of the detected concentration.

(2) This is a concentration analysis system that samples from the card, with a pre conditioning system at the front end. The sampling material adopts a 45 degree oblique insertion method, and there is a transition net at the sampling point, which can effectively remove dust from the gas emitted by the product. It also effectively controls the temperature and generates gas with cold road water, making it more efficientThe condensate can flow back to the sampling rod and then return to the flue. The sampled gas is then passed through a primary flue gas filter to precisely filter out dust from the flue gas; The sampled gas is then passed through a dual channel electronic cooler, which will provide sufficient cooling and temperature removal for the sampled gas

The temperature of the sampled gas will be lowered, and the condensed water will naturally flow into the internal container of the electronic automatic drainage device. The automatic drainage device will automatically drain according to the amount of water in the container; After passing through the sampler of the dual channel electronic cooler, and then passing through the secondary flue gas through the pump

To prevent the failure of the front dual channel electronic cooler or the occurrence of a large amount of humid mixed gases in the flue gas, which may affect the UV absorption analyzer; Dry and clean sampling gases can be used to analyze and calculate the absorbance using a UV spectrophotometer

The UV absorption method ozone concentration analyzer should have automatic zero calibration, temperature and pressure compensation functions, and be able to operate continuously for 24 hours; After passing through the ultraviolet ozone concentration analyzer, the gas passes through the ozone tail gas disruptor to reduce ozone to oxygen, which is then added to the sample gas

There is no longer ozone gas, and it is discharged through an anti-corrosion brushless negative pressure suction pump. The gas sucked by the pump no longer contains ozone gas, which can extend the service life of the negative pressure suction pump.

5、 Process flow

The flue gas sampling rod is installed inside the dry denitration chimney at a 45 degree angle, connected to the flange on the outside, and a gas filter screen should be installed at the front end of the flange. The sampled gas is then passed through a first stage flue gas filter to finely filter the gas in the sampled gas. The filter element needs to be replaced regularly to prevent blockage; The sampled gas is then passed through a dual channel electronic cooler, which is a dry secondary cooler. Its function is to fully dry the moist gas and allow the chilled water to naturally flow into the container of the electronic automatic drainage device. The electronic automatic drainage device and the dual channel electronic cooler must be connected through a pipeline to maintain negative pressure balance in the pipeline, so that the chilled water can flow smoothly into the container of the electronic automatic drainage device; The sampled gas passes through a dual channel electronic cooler and then through a secondary flue gas filter. This filter is a dry precision filter to prevent the humidity of the sampled gas from being too high or the dual channel electronic cooler from failing. The humid sampled gas enters the ultraviolet absorption method ammonia concentration analyzer, and then enters the ultraviolet absorption method ammonia concentration analyzer to analyze and calculate the degree of ammonia concentration. The ultraviolet absorption method ammonia concentration analyzer should have automatic zero calibration, temperature and pressure compensation functions, and can operate continuously for 24 hours; Then, the gas with odorous ammonia is catalytically reduced to a gas without odorous ammonia through the odorous ammonia tail gas disruptor. The odorless gas is then discharged into the air through an anti-corrosion negative pressure suction pump. The gas sucked by the negative pressure suction pump no longer contains odorous gas, which can extend the service life of the negative pressure suction pump.