GB2188562A

GB2188562A - Combustion gas depurator mechanism

Info

Publication number: GB2188562A
Application number: GB08701973A
Authority: GB
Inventors: Nieto Domingo Diez
Original assignee: DEPURATOR SA
Current assignee: DEPURATOR SA
Priority date: 1986-03-03
Filing date: 1987-01-29
Publication date: 1987-10-07
Also published as: DE3705685A1; ES292673Y; GB8701973D0; IT1203490B; IT8719416A0; FR2595055A1; JPS62210034A; ES292673U

Abstract

The depurator 4 is arranged at the fume release chimney exit, after a known solid particle release mechanism 2, and has the purpose of removing sulphurous anhydride from the combustion gases. The fumes, already free from solid particles, enter an expansion chamber provided with atomizers 5 which eject under pressure a liquid wherein the sulphurous anhydride is fixed, the liquid being aspired from a container 7 through an electropump group 6. Under gravity, the liquid falls from the expansion chamber in order to be re-used. Inside the container 7 a stirrer 10 homogenizes the mixture. After neutralization the liquid is drained to the sewer through a drainage 11. The electropump group 6 may function automatically with a boiler burner. <IMAGE>

Description

SPECIFICATION Combustion gas depurator mechanism The present invention, as stated in the title of these specifications, comprises a combustion gas depurator mechanism.

Among the atmospheric contaminants produced bythe combustion not only of carbons, but also of petroleum derivatives (gas-oil and fuel-oil), which are used in thermic central heating, factories, etc., one of the most harmful, if not the most dangerous among them, is the sulphurous anhydride.

Considering the fact that solid and liquid fuels contain different proportions of sulphur, in the burning thereof the production of the already mentioned sulphurous anhydride can not be avoided.

The danger of this colourless gas is not the dirt which the different solid particles suspended in the fumes may produce, but the causticity thereof, which attacks metals and principally, this being most serious, the respiratory tract, since when itcontacts humidity, it is transformed into sulphurous acid, which is highly caustic.

According to this invention, a combustion gas depurator mechanism has being conceived to obtain the complete release of the produced sulphurous anhydride.

The complete release of every solid particle being produced in any fuel combustion, is performed in a known mechanism, by means of which thefumes coming out the chimney enter an expansion chamber, colliding in the vertical thereof with an inverted cone which makes the fumes distribute by its lateral portions and due to gravity the solid particles settle atthe lower portion of this solid particle depurator. The fumes continue ascending and pass along invertedtruncatedconestoreach another similar one wherein the total release of said solid particles is completed.Above these elements, there is a water circuit provided with pulverizers for the under-pressure wash of all the elements, the water emerging through a drainage provided atthe lower portion of the depuratortowards a hydraulic siphon for the coming out into the sewer.

According to the invention, the fumes, which are already free from solid particles, enter an expansion chamberwherein two pulverizers are provided, said pulverizers ejecting under pressure the sulphurous gas fixing liquid, which, at close contact with the combustion gases, release the 802 orsulphurous anhydride.

The liquid is aspired from a container wherein a small stirrer is provided, so that the liquid is perfectly mixed due to the differences in density, sincethe liquid flowing along the pulverizers is conducted into this containerforthe re-use thereof. The aspiration is performed by a small electropump group, which impells it towards the pulverization chamber, wherein it is closely mixed with the combustion gases, returning to the container due to the gravity.

The electropump group functions automatically with the heating boiler, thermic central, etc. burner, since, as it is known, in every heating system the burner does notworkcontinuously,saidworking stopping for a third of the time approximately.

Once the liquid has been neutralized, this one is conducted towards the sewer through a drainage provided atthe bottom ofthe container.

The mixture of the catalytic liquid used is related to the sulphide rate of burned products and due to this, the maximal authorized sulphur contents, legaly established, must be taken into account.

Forthe help of a better understanding ofthese specifications and as a part thereof, a drawing sheet is attached, in the single drawing of which it has been represented, with an illustrative but non-limitative character, a section in vertical position of the combustion gas depurator mechanism, object of this invention, arranged to the exit conduct of a mechanism known in itself, wherein the solid particles produced in any fuel combustion are released.

Referring to the numeration indicated in this figure, it can be seen howthe chimneyforthe release ofthefumes produced by fuel combustion, in general referred to with No. 1 and partially representedinthefigure, has a mechanism arranged, which, also is in general referred to with No. 2, wherein the solid particles produced bythe combustion are released, said mechanism being used nowadays and wherein only said solid particles are pulled by the water flowing through pulverizers provided at the upper portion thereof.

At the exit ofthe depurator 2 of solid particles, a conduction 3 is arranged for the exit of combustion fumes, already free from solid particles and in the opening of which the mechanism object of this application, in general referred to with No. 4, is arranged.

The depurator mechanism 4 presented in the invention, is arranged in orderto releasethe combustion gases, specifically the sulphurous anhydride produced, which, as said hereinabove, is the most dangerous and contaminant, since it damages the airways and when it contacts humidity itistransformed intosulphurousacid,whichis highly caustic.

The depurator mechanism 4 comprises a container wherein the fumes, already free from solid particles, expand and closely mix with the liquid being ejected under pressure by the pulverizers 5.

The sulphurous gas fixing liquid is aspired by the electro-pump group 6 from a container 7, and it is conducted from the depurator 4 bottom 8 again through the pipe 9 towards the very container 7, to be re-used again.

On the basis of density differences of the pure liquid which is contained in the container 7 and of that one which enters said container through the conduct 9, which constitutes the catalyzing liquid, a small stirrer loins provided inside the container 7, with which the mixture becomes homogeneous.

Once the liquid contained in the container7 has been completely neutralized, it is drained towards the sewerthrough the drainage 11.

Claims

1. Acombustion gas depurator arranged ata fume release chimney exit, after a solid particle removal device, and having the purpose of removing sulphurous anhydride from combustion gases, characterised in that the fumes, already free from solid particles, enter an expansion chamber provided with pulverizers which eject under pressure liquid wherein the sulphurous anhydride is fixed, the liquid being aspired from the bottom region of a containerthrough an electropump group up to the expansion chamber, wherein it falls due to gravity in orderto be re-used; inside the container there being optionally a stirrer so as to homogenize the mixture,which, after neutralization, is drained through a drainage provided atthe container bottom.

2. Acombustion gas depurator as claimed in claim 1, in which the electropump group functions automaticallywith a boiler burner.

3. Acombustion gas depurator mechanism substantially as described with reference to, and as shown in, the accompanying drawing.