FR2595055A1 - COMBUSTION GAS CLEANER - Google Patents

Abstract

COMBUSTION GAS SCRUBBER DEVICE, TO BE INSTALLED AT THE EXIT OF THE SMOKE EXHAUST CHIMNEY 1 AND AFTER A KNOWN DEVICE 2 FOR THE REMOVAL OF SOLID PARTICLES, TO REMOVE SULFUROUS ANHYDRIDE FROM THE COMBUSTION GAS, IT INCLUDES A CHAMBER 'EXPANSION 4 IN WHICH THE FUMES ALREADY CLEAR OF SOLID PARTICLES ENTER, THIS EXPANSION CHAMBER IS EQUIPPED WITH SPRAYERS 5 WHICH SPRAY UNDER PRESSURE THE LIQUID INTENDED TO FIX THE SULFUROUS ANHYDRIDE AND A RECEPTACLE 7 TO THE SULFUROUS ANHYDRIDE AND A RECEIVER 7 MEANS OF AN ELECTRO-PUMP GROUP 6 AND RETURNED FROM BOTTOM 8 OF THE SPRAYING CHAMBER TO CONTAINER 7 IN QUESTION IN WHICH IT FALLS UNDER THE EFFECT OF GRAVITY TO BE USED AGAIN; AN AGITATOR 10 IS PROVIDED INSIDE THE CONTAINER TO HOMOGENEIZE THE MIXTURE, WHICH IS DRAINED TO THE SEWER AFTER ITS NEUTRALIZATION, BY A DRAINAGE ORIFICE 11 LOCATED AT THE BOTTOM OF THE CONTAINER.

Description

The present invention relates to a purifier device

of combustion gas.

  Among the atmospheric contaminants produced by combustion, one of the most harmful is coal and petroleum derivatives (gas oil and fuel oil) used for heating, in thermal power plants, factories, etc. , if not the most

  dangerous of all, is sulfur dioxide.

  Since both solid and liquid fuels contain different proportions of sulfur, their combustion inevitably gives rise to the formation

  of the sulfur dioxide in question.

  The danger of this colorless gas is not due to the dirtying action that can be produced by the various solid particles suspended in the smoke, but to its corroding action due to the fact that it attacks metals and above all, and this is the most serious, respiratory tract, because when coming into contact with

  humidity it turns into extremely corrosive sulfurous acid.

  The invention relates to a device for purifying combustion gases, which makes it possible to completely eliminate the anhydride.

sulfurous product.

  The total elimination of all the solid particles which are produced during the combustion of any fuel takes place in a known device, by means of which the fumes which leave the chimney penetrate into an expansion chamber, thereby striking during their vertical displacement with an inverted cone which forces the fumes to distribute laterally and to cause the solid particles to settle under the effect of the force of gravity in the lowest part of this purifier of solid particles . The fumes continue their ascent passing through inverted truncated cones to arrive at another similar truncated cone in which is completed

  total elimination of these solid particles.

  Above these elements is arranged a water circuit provided with sprayers for washing under pressure of all the elements, the water leaving through a drainage orifice located in the

  lowest area of the purifier to arrive at a water trap

outflow to the sewers.

  According to the invention, the fumes which are now devoid of solid particles penetrate into an expansion chamber in which are located two sprayers which project under pressure the fixing liquid of sulfurous gas which eliminates SO2 or sulfur dioxide by coming into intimate contact with

combustion gases.

  This liquid is sucked from one. container in which

  a small agitator is installed so that the liquid is

  completely mixed despite the differences in density, because this container receives the liquid which passes through the sprayers,

  so that it can be used again.

  The suction of this liquid is carried out by a small glectropump group which directs it to the spraying chamber, in which it is intimately mixed with the combustion gases,

  and then returns to the container under the effect of gravity.

  The electric pump unit operates automatically with the burner of the heating boiler, the thermal power station, etc., since, as is well known, in any heating installation, the operation of the burner is not continuous and it is interrupted approximately during the third

time.

  When the liquid has been neutralized, it is discharged to

  the sewers through a drainage hole located at the bottom of the container.

  The mixture of the catalyst liquid used depends on the

  percentage of sulfur contained in the burnt products, and therefore the maximum quantities of sulfur must be taken into account

  which are legally established.

  To facilitate understanding of this description and

  forming an integral part thereof, there is attached a sheet of drawings in the single figure of which there has been shown by way of illustration and without limitation, a sectional elevation view of the device for cleaning the combustion gases, object of the invention, connected to the outlet pipe of a known device in which the elimination of solid particles takes place

  that are produced when you burn any fuel.

  In the figure we can see that the chimney-evacuation of the fumes produced when the fuel is not burned, which bears the general reference 1 and which is partially represented in the figure, is provided with a device, which bears the reference general 2, in which the elimination of solid particles produced by combustion takes place, this device being currently used and in which these solid particles are the only ones which are entrained by the water which is supplied by sprayers

arranged in its upper area.

  At the outlet of the purifier 2 for solid particles, there is installed an outlet pipe 3 for the combustion gases which have already been freed from the solid particles and at the mouth of which is located the device which constitutes the object of the

  present invention which bears the reference number 4.

  The purifier device 4 according to the invention is intended to eliminate the combustion gases, more precisely the sulfur dioxide formed and which, as said above, is the most dangerous and the most contaminating, since it attacks the pathways respiratory and when in contact with moisture

  transforms into extremely corrosive sulfurous acid.

  The purifier device 4 consists of a container in which the expansion of the fumes already rid of solid particles takes place and in which the fumes mix

  intimately with the liquid which comes out under pressure from the sprayers

  sators 5. The sulfurous gas fixing liquid is sucked up by the pump-pump unit 6 from a container 7, and it is led again, from the bottom 8 of the purifier 4, by means of the pipe 9, up to container 7, to be used

again.

  To take into account the difference in densities between the pure liquid contained in the container 7 and that which enters this container via the line 9 of catalyst liquid, a small agitator 10 is provided inside the container 7 so

to obtain a homogeneous mixture.

  When the liquid contained in the container 7 has been completely neutralized, it is evacuated to the sewer by means

drain 11.

Claims (1)

CLAIM   Combustion gas purifying device, to be installed at the outlet of the chimney (1) for evacuating smoke and after a known device @) for removing solid particles, and having the purpose of removing sulfur dioxide from the gases combustion chamber, characterized in that it includes an expansion chamber (4) into which the fumes which have already been freed of solid particles penetrate, this expansion chamber being provided with sprayers (5) which project the liquid under pressure intended to fix sulfur dioxide, this liquid being sucked from a container (7) by means of a pump-pump unit (6) and led from the bottom (8) of the   spray chamber to the container (7) in question in the   - Which it falls under the effect of gravity to be used again, an agitator (10) being provided inside the container to homogenize the mixture, the latter being evacuated in the sewer after its neutralization, by an orifice drain (11) located at the bottom of the container, provided that the electric pump unit operates automatically at the same time as the burner of the boiler.