Anti-blocking dehumidification sampling equipment in continuous and automatic smoke monitoring system

Abstract

The invention provides anti-blocking dehumidification sampling equipment in a continuous and automatic smoke monitoring system, which relates to the technical field of smoke monitoring equipment. The anti-blocking dehumidification sampling equipment comprises a demisting device, an anti-blocking device, a heating dehumidification device and a smoke sampler that are connected with one another in sequence, wherein the heating dehumidification device comprises an outer sleeve, an inner sleeve and a heating pipe component that are sequentially arranged in the circumferential direction from outside to inside; the heating pipe component comprises a first intermediate pipe, a second intermediate pipe and heating pipes arranged on the outer sides of the circumferences of the first intermediate pipe and the second intermediate pipe; the first intermediate pipe and the second intermediate pipe are coaxially arranged, and a clearance is left between the first intermediate pipe and the second intermediate pipe. According to the anti-blocking dehumidification sampling equipment, gypsum slurry carried in wet desulfurized flue gas can be effectively removed, so that a sampling probe of the continuous and automatic smoke monitoring system is prevented from being blocked, the safe, stable and reliable operation of the continuous and automatic smoke monitoring system is ensured, the maintenance period of the equipment is prolonged, and the quantity of spare parts and the consumption of standard gas are reduced, therefore, the anti-blocking dehumidification sampling equipment has good social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of flue gas monitoring equipment, in particular to an anti-blocking and dehumidification sampling equipment in a continuous automatic flue gas monitoring system. Background technique [0002] In the wet limestone desulfurization system of the power plant, the CEMS system will be used. CEMS is the abbreviation of Continuous Emission Monitoring System in English. The device of the competent department is called "automatic monitoring system for flue gas", also known as "continuous monitoring system for flue gas emission" or "online monitoring system for flue gas". The sampling pipe of CEMS is located in the flue. The flue gas discharged from the wet limestone desulfurization system often reaches a relative humidity of 99%, and the flue gas contains gypsum slurry. Therefore, the sampling probe of the sampling pipe is easily polluted, blocked, and even scrapped in severe cases. The component damage rate is high ...

AI Technical Summary

Problems solved by technology

The sampling pipe of CEMS is located in the flue. The flue gas discharged from the wet limestone desulfurization system often reaches a relative humidity of 99%, and the flue gas contains gypsum slurry. Therefore, the sampling probe of the sampling pipe is easily polluted, blocked, and even scrapped in severe cases. High component damage rate and high maintenance costs

The polluted ones use probes, which can be cleaned by ultrasonic waves, but the system needs to be re-calibrated during installation, which will affect the calculation of desulfurization efficiency in the desulfurization system

[0003] In response to this situation, some manufacturers installed a heating device at the inlet of the sampling head. Although the temperature of the flue gas was increased, the slurry content in the flue gas did not decrease, and the problem of probe blockage was not fundamentally resolved.

Therefore, the sampling probe of the CEMS system is easily blocked by gypsum slurry, and the probe is easily corroded under the action of flue gas, which has become a technical problem in the sampling process

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