Lead fume purifier in lead-acid storage battery industry and purification method of lead fume purifier

Abstract

The invention relates to a lead fume purifier in a lead-acid storage battery industry and a purification method of the lead fume purifier. The purification method comprises the following steps of introducing fume through an air inlet, controlling the speed of airflow impacting the liquid surface within 5-8 meters per second by virtue of a wind baffle, enabling the airflow to impact an S-shaped demisting baffle plate in a speed less than or equal to 1.5 meters per second after the water surface is impacted, enabling the air to pass through the section of an active carbon filter layer in the speed less than or equal to 2 meters per second after the air is purified by virtue of a primary filter material, enabling the air passing through the active carbon filter layer to pass a secondary filter material filter again, finally filtering the air by virtue of a frame type efficient filter consisting of H13-H15 or U15-U17, and exhausting the fume through an air outlet, wherein the purification level of the primary filter material is F5-F9, the purification level of the H13-H15 is HEPA (High Efficiency Particulate Air), and the purification level of the U15-U17 is ULPA (Ultra Low Penetration Air). The minimal filter fineness of the lead fume purifier can reach 0.1 micron, the lead fume purifier is applied to a plate casting process of the lead-acid storage battery industry and is used for filtering complex mixed smoke of oil gas in the lead fume, the discharging concentration of lead ions in the purified smoke is less than or equal to 0.07 milligram per cubic meter and is far lower than national emission standards, and the problem that pollutants in a pole plate casting procedure of a lead-acid storage battery are difficultly thoroughly purified is solved.

Description

technical field [0001] The invention is an improvement to a lead fume purifier, and in particular relates to an integrated filtration process of a wet water film and a dry high-efficiency filter. Background technique [0002] The grid casting process in the lead-acid battery industry will produce a lead-containing smoke mixture, which is mixed with a large amount of cork powder, engine oil, and bone glue. If a dry purification process is adopted, the mixture containing oil and glue will quickly block the ventilation filter holes of the filter material, the service life is short, and it is easy to cause a fire at a certain temperature. [0003] If a wet water film dust collector is used, the purification efficiency is low, and there is a certain amount of water vapor after the water bath, which exists in a liquid or gaseous state in the dust collector, which cannot meet the harsh conditions for using a high-efficiency filter (the environment must be dry). Chinese patent CN20...

AI Technical Summary

Problems solved by technology

If the dry purification process is adopted, the mixture containing oil and glue will quickly block the air filter holes of the filter material, the service life is short, and it is easy to cause a fire at a certain temperature

[0003] If a wet water film dust collector is used, the purification efficiency is low, and there is a certain amount of water vapor after the water bath, which exists in a liquid or gaseous state in the dust collector, which cannot meet the harsh conditions for using a high-efficiency filter (the environment must be dry).

Chinese patent CN201120421659.6 Lead fume purifier uses nozzle spraying to form water mist, which will cause a high water-carrying rate in the gas finally discharged from the dust collector, and lead ions will be mixed in the circulating water, which will eventually affect the environmental protection testing results.

The existing lead fume purifier adopts the water film dedusting process to prevent fire and clean the soot. In order to blindly improve the filtration efficiency, multi-stage water film dedusters are used to purify in series, which will cause the resistance of the system to increase linearly and eventually cannot be dehydrated. Clean, causing the lead ions in the water vapor to be discharged into the atmosphere with the airflow, affecting the environmental protection detection effect and making it difficult to meet the standard

The use of dry dust collectors cannot overcome the problem that the oil and bone glue in the flue gas seriously block the filter pores of the filter material, and it is very easy to cause a fire at a certain temperature

Using an electrostatic precipitator, the mixture of cork powder, oil, and bone glue sticks to the surface of the electrode, which cannot be cleaned thoroughly. Under a certain amount of accumulation, the electrostatic electrode will fail and easily cause a fire.

[0006] The above objective phenomena seem simple, but the problem of releasing heavy metal pollutants in the casting process of lead-acid battery plates has not been effectively solved for a long time, which is enough to show the technical difficulty people solve

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