Process and apparatus for purifying waste gases
AssigneeCanadian Fine Color Company, Limited
InventorAttila P. Koncz
Life of this patent
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Abstract
Process and apparatus is disclosed for purifying waste gases containing minute pollutant liquid and solid particles. The process comprises treating the gas stream with a fine spray of scrubbing liquid by introducing into the gas stream the spray of droplet size in range of 1 micron or less. The scrubbing liquid is mixed with pollutant particles to wet and enlarge them in a turbulent region without appreciably increasing the pressure of the gaseous stream. The mixed gas stream is passed out of the turbulent region to a zone for removing the enlarged conglomerated contaminate particles from the gas stream. Apparatus is disclosed in which the process is carried out.
Claims28
A process for purifying a waste gas stream containing minute pollutant liquid and solid particles as small as 1 micron or less, said process comprising treating said gas stream with a fine spray of scrubbing liquid by introducing into said gas stream said spray of a droplet size in the range of 1 micron or less, generating in said gas stream by agitation a turbulent region without appreciably increasing the pressure of said gas stream, said turbulent region having a Reynolds number measure of turbulence in the range of 1.times.10.sup.6 to 1.times.10.sup.8, mixing the introduced scrubbing liquid and pollutant particles in said turbulent region to enhance thereby the conglomeration of pollutant particles with scrubbing droplets to form larger particles and passing the mixed gas stream out of said turbulent region and removing the enlarged conglomerated contiminate particles from the gas stream to purify it.
In a process for scrubbing minute pollutant liquid and solid particles as small as 1 micron or less from a waste gas stream a scrubbing liquid being introduced into the gas stream and subsequently passing the treated gas stream into a particle separator;
- the improvement comprising spraying into said gas stream a scrubbing liquid of a droplet size in the range of 1 micron or less, generating by agitation a relatively high turbulent region without appreciably increasing the pressure of the gas stream, said turbulent region having a Reynolds number measure of turbulence in the range of 1.times.10.sup.6 to 1.times.10.sup.8, mixing the introduced scrubbing liquid and pollutant particles in said relatively high turbulent region to contact pollutant particles with scrubbing droplets which form enlarged particles, passing such mixed gas stream out of said turbulent region and filtering the enlarged pollutant particles from the gas stream to purify it.
Apparatus for purifying a waste gas stream containing minute pollutant liquid and solid particles as small as 1 micron or less, said apparatus comprising a turbulence generator capable of generating by agitation turbulence in the gas stream of a degree represented by a Reynolds number of 1.times.10.sup.6 to 1.times.10.sup.8 without appreciably increasing the pressure of the gas stream, means for delivering the gas stream to an intake of said turbulence generator and second means for delivering the gas stream away from an exhaust of said turbulence generator, means for introducing into the gas stream a scrubbing spray of liquid droplet size in the range of 1 micron or less, said spray means being located within said intake delivery means and upstream of said turbulence generator, said exhaust delivery means delivering the mixed gas stream and scrubbing liquid which forms enlarged particles containing the contaminates to means for filtering the enlarged particles from the gas stream to purify the waste gas stream.
Dependencies are inferred from the claim text.