Water drop grid device

Abstract

The invention relates to a water drop grid device, and in particular relates to a water drop grid device for removing dust in flue gas. The water drop grid device comprises a plurality of atomizing nozzles which are combined together and face towards the same direction, wherein, water supply ends of the atomizing nozzles are connected with a water supply device via pipes. The water drop grid device has the advantages that a non-settled combination of dust and water mist is subjected to secondary treatment after primary flue gas treatment, namely, the combination which is not settled at the first time is captured by virtue of the formed denser water mist and then is settled and discharged, which further effectively lowers ash content in the flue gas and meanwhile better overcomes defects of the original metal wire grating such as easiness in blockage, difficulty in washing and the like.

Description

technical field [0001] The invention relates to a water drop grid device for removing dust from flue gas, belonging to the technical field of environmental protection. Background technique [0002] With the rapid development of industry, the country has attached great importance to environmental protection. One of the environmental protection tasks is the dust reduction and dust suppression of flue gas, and the purification of exhaust gas. In order to meet the national exhaust emission standards. [0003] Water mist is an economical and effective method for purifying exhaust gas. At present, the use of water mist to purify flue gas uses large-flow air-water atomization nozzles, which produce an average droplet diameter of about 250um (the weight ratio of the droplet size is generally divided into: the droplet diameter is about 60% below 150um; above 150um accounted for about 40%), fully combined with the flue gas (according to the general flue gas flow rate of 8m / s, the dr...

AI Technical Summary

Problems solved by technology

At present, the use of water mist to purify flue gas uses large-flow air-water atomization nozzles, which produce an average droplet diameter of about 250um (the weight ratio of the droplet size is generally divided into: the droplet diameter is about 60% below 150um; above 150um accounted for about 40%), fully combined with the flue gas (according to the general flue gas flow rate of 8m / s, the droplet diameter is: below 150um is non-sinkable; the droplet diameter is: 150um and above is sinkable), The combination that can settle will settle and discharge, and the smaller combination will be discharged out of the chimney with the airflow, so the dust removal efficiency is low, and the ash content of the exhaust gas is generally 100mg / Nm 3 about

In order to reduce the ash content of the exhaust gas, people use a dense metal wire tangible grid (also known as a water-gas separation device) to capture smaller combinations to improve the efficiency of dust removal (the ash content of the exhaust gas can reach about 30mg / Nm ), but the wire grid is easy to block and difficult to clean, so it does not work properly and cannot be popularized and applied

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