Gas separation – With nonliquid cleaning means for separating media – Solid agent cleaning member movingly contacts apparatus
Patent
1994-06-09
1996-01-02
Spitzer, Robert
Gas separation
With nonliquid cleaning means for separating media
Solid agent cleaning member movingly contacts apparatus
55223, 55228, 552577, B01D 4706, B01D 4718
Patent
active
054804639
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns an apparatus for flue gas cleaning.
The firing installations which are conventional at the present time require a given waste gas temperature so that no condensate is formed in the chimney. Depending on the building material involved the chimneys even have to be insulated so that the required waste gas temperature (about 180.degree. C.) can be maintained. As a result a relatively large proportion of the energy produced is not used and is pointlessly discharged to the environment.
In the case of firing installations which are operated with oil and gas, there are already heating systems which, by way of further heat exchangers, cool the flue gas down to about 45.degree.. In such an arrangement the second heat exchanger is of high-grade steel and delivers the thermal energy to the boiler. The third heat exchanger is of plastic material and warms the intake air for the burner. The condensate which is produced in that operation is removed by way of a catalyst.
However this method cannot be used in relation to solid fuels. More specifically, excessive amounts of dusts and ashes are produced in the combustion of solid fuels. As a result the condensate is not produced in the form of a fluid. On the contrary what is produced is a tarry-resinous residue which would clog the corresponding further heat exchangers within a short period.
In addition for example pure wood-burning heating installations can scarcely still comply with the omission values which are required nowadays. The combustion of partially chemically charged wood products such as for example chipboards (formaldehyde) and chips is no longer possible in consideration of the omission requirements.
In regard to such flue gas cleaning apparatuses the closest state of the art is to be found in FR-A-1 055 181. That publication already discloses an apparatus for flue gas cleaning comprising a scrubbing chamber, a flue gas feed, a flue gas discharge and a drain for used scrubbing water and a device for the feed and atomisation of the scrubbing water, wherein arranged in the scrubbing chamber is a device which is rotatable about a horizontal axis by means of a drive motor and which carries devices for atomisation of the scrubbing water. That publication represents the closest state of the art in terms of the general kind of apparatus in relation to the present invention.
FR-A-328 798 discloses an apparatus which is extremely similar to the above-indicated flue gas cleaning apparatus.
DE-A-24 37 743 discloses a flue gas cleaning apparatus in which the flue gas is passed through a scrubbing chamber in which there is arranged a hollow rotary body whose front portion contains a nozzle system and on the surface of which are disposed guide vanes. In that arrangement however the vanes serve to drive the hollow rotary body insofar as they take the kinetic energy required for that purpose from the movement of the flow of flue gas through the scrubbing chamber.
FR-A-2 162 144 discloses a flue gas cleaning apparatus having a scrubbing chamber in which the flue gas is also acted upon by droplets of water sprayed by a rotating device.
EP-A-0 096 149 discloses a flue gas cleaning method using a chamber having a coaxial rotary atomiser device, by means of which scrubbing fluid is introduced in drop form into the flow of gas and brought into contact with the suspended substances.
GB-A-2 014 470 discloses apparatus for removing dust from gas, in which cleaning water which is sprayed in is also atomised and brought into contact with a flow of gas to be cleaned.
DE-A-23 62 635 discloses a flue gas cleaning apparatus in which the flue gas is passed through a scrubbing chamber in which a hollow rotary body is rotatably and drivably arranged, the front portion thereof containing a nozzle system and guide vanes being disposed on the surface thereof. The vanes serve for a helical movement of the flow of flue gas past the hollow rotary body which is in spindle form and which fills a large part of the scrubbing chamber and which is not permeable to gas.
Star
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