JPS5854855B2 - Fukatsuseigaseisanhouhououyobisouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized by the combustion of liquid or gaseous hydrocarbons in a combustion chamber with combustion air or with a mixture of gaseous atomizing media (steam, gas, inert gas or air). The present invention relates to a method for producing inert gas, as well as an apparatus for carrying out the method.

Inert gases such as those produced by the method of the invention are primarily used in oil tankers for transport purposes for neutralizing the atmosphere in empty tanks and for providing inert atmosphere conditions in full tanks. It will be done.

However, such inert gases can also be used for fire extinguishing purposes, and as protective gases during the transport of perishable goods such as fish meat, or as internal protective gases such as in refrigerated warehouses. .

Spray cooling system in which an inert gas is produced in a combustor in a combustion chamber with a ceramic lining, and the gas is subjected to a drying process in a drying system, in which some of the water has already been condensed. It is known that it can be subsequently cooled in a container.

These conventional methods require fairly expensive equipment, consume a large amount of energy for cooling, and are slow to control, often not allowing rapid shutdown, which can result in damage to the combustion chamber. There is a disadvantage that there is

Furthermore, conventional methods have the disadvantage that maintaining the desired composition of the inert gas is complex and can lead to system failure and the need for repair, while repair is extremely difficult, especially as far as the combustion chamber is concerned. The point is clear.

Moreover, the inert gas produced by these systems must be dried with expensive equipment.

On the contrary, the aim of the invention is to provide a method and a device for carrying out this method which no longer suffer from the disadvantages mentioned above and of the prior art in general.

In particular, the process according to the invention must be easy to control and have as little sluggishness as possible, require minimal energy for drying, and achieve the desired results even in the case of fuel oils with high sulfur content. It should be possible to easily produce an inert gas with constituents, to be able to carry out the production easily and economically, and to be able to use equipment that is economically manufactured and small in size.

Additionally, the system must include a simple inert gas trunk dryer that can be rapidly regenerated.

Furthermore, the method for cooling the inert gas must be simple and capable of being implemented by conventional cooling systems such as those commonly found on ships.

Primarily, these cooling devices are so-called Freon cooling devices in which water is indirectly cooled.

Therefore, the device of the present invention must have a structure that is small, well-organized, and trouble-free.
The device must also be suitable for assembly into a self-contained device to enable economical production.

According to another object of the invention, this combustion chamber must be able to start and stop quickly and must be protected against damage even in the event of a failure of the cooling water supply system. Moreover, this combustion chamber must be able to be installed in any position.

These objectives require that combustion is immediately followed by a first impulsive cooling step, in particular by spray cooling, followed by a second cooling step and a washing step with water or an aqueous solution at a temperature near the freezing point, and the absorption The solution is that the gas treatment is terminated by a drying step.

Practical tests have shown that the inert gas production device according to the invention operates in a fully satisfactory manner.

However, for the production of relatively "wet" inert gases that are useful for most purposes, this generation equipment is either too expensive or insufficiently efficient for these specific purposes.

More specifically, cleaning equipment is expensive to operate for several reasons.

These relative disadvantages are as follows.

A cleaning device is operationally economical only if the gas and water capacities are matched to each other in a suitable manner.

When the volume of flow-through gas changes, the volume of flow-through water must be modified to maintain an optimum value.

Each cleaning device is configured according to its capacity and capacity1
It operates with two optimum flow rates.

When the pressure of the gas stream exceeds the permissible value, the wash water is retained in one laterally extending layer of the cooling tower (overflow or beyond a flow restriction).

In an overpressure situation, the gas simply forms large bubbles that reach the top of the scrubber, whereas if excess water is used, the scrubber becomes uneconomical to operate.

Since the bottom layer of the washer backing is in contact with the extremely hot combustion gases, this layer must be comprised of a highly heat resistant backing element.

This type of filler (e.g. German Industrial Standard DIN 440)
4 or Al5I316L) is extremely expensive.

The backing elements in the cleaning device rupture individually after a period of time, which, as experience has shown, results in a reduction in gas pressure due to flooding or restricted flow.

If the inert gas capacity is large and the height of the structure is limited (for example on board a ship), the diameter of the cleaning device must be increased, which results in a relatively expensive construction.

It is therefore another object of the invention to produce an inert gas with a dew point of, for example, +300 C, without the need for a cleaning device following the combustion chamber, and which can therefore be used for multiple purposes without further hassle. It is an object of the present invention to provide an inert gas production device that obtains the desired results.

For example, the "wet" inert gases of interest here can of course also be used in oil tankers to neutralize the atmosphere in empty tanks.

Of course, the field of use of the inert gas produced according to the invention is not limited to this purpose.

Selecting this inert gas according to the requirements of its use is the task of a specialist.

The improvement of the production method therefore lies in the fact that the washing device is omitted.

Therefore, according to the invention, the necessary first and second cooling stages of the inert gas produced are carried out as one spray cooling operation, whereby they are preferably operated using a cooling water stream from the same source. Ru.

A further simplification of the inert gas production equipment required to carry out this method is due to the fact that the first and second cooling stages are operations carried out within the combustion chamber and extensions of the combustion chamber. can get.

This allows optimal use of the space or volume occupied by the inert gas generator.

By omitting the washing device, a significantly more coherent system is obtained than the device according to the first embodiment.

In order to dry the inert gas more easily, the velocity of the gas in the second cooling chamber or combustion chamber extension is at least twice the velocity in the combustion chamber, taking into account the change in volume due to cooling.
Reduced to 5 defeats.

To carry out this method, an inert gas production device can be used which has a double water jacket or a double shell combustion chamber, the water jacket of which has a flow of cooling water flowing through it and has a gas outlet. Adjacent is a spray nozzle for the outlet of the cooling water from the double water cannula into the combustion chamber, whereby such a double water cannula combustion chamber is also used in the first embodiment.

According to the invention, the interior of this combustion chamber is connected to a second cooling space having on its wall a spray device (spray nozzle, spray head) supplied with cooling water passing through a double water cannula. is new.

It has been found that an excellent cleaning effect can be obtained by a strong spraying action with no inert gas.

In particular, sulfur dioxide gas SO2 is almost completely removed.

However, in some cases it may be desirable to lower the dew point of the gas produced even further.

For this purpose, it has been proposed to pass the produced gas again further into a cooling cavity configured as a spray or irrigation cooling device.

On the other hand, it is also possible to conduct part of the cooling water, in particular of the second cooling chamber, into a separate circuit, so that the latter circuit contains a cooling device that cools the cooling water to a very low temperature. become.

In particular, for this purpose, the invention provides that the part of the second cooling cavity through which the gas continues to flow is provided with a collecting and discharging device so that the separately discharged cooling water separates from that of the remainder of the cooling water stream. We propose a structure that is separated.

Next, exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In order to carry out the method of the invention, a combustor provided in the apparatus of the invention and e.g.
Control processes such as those described in 0442 and 2246742 are used.

Regarding these, clear references can be obtained from the descriptions of the above-mentioned published patents.

As shown in the left-hand part of Figures 1 and 2, fuel oil, for example, is combusted in a two-stage combustor in which air, gas, inert gas or steam is used as the propellant, so that the combustion air is It is fed in series through a combustor 20 in a manner known per se.

It is recognized by experts that the method according to the invention is suitable for the combustion of gas, natural gas and fuel oils with a low sulfur content, as well as for the combustion of fuel oils or heavy oils with a high sulfur content of up to 4. It's amazing.

The generated flame and hot combustion gases enter the actual combustion chamber 22, which is cylindrical and equipped with a cooling water canister 21, in which an inert gas with a very low nitrogen oxide content is produced.

Furthermore, the inert gas produced here is, for example, 11,000
Even at the lowest oxygen concentration, such as pp, it contains a very low proportion of carbon monoxide CO.

Soot formation is completely eliminated.

Cooling water flows through the water jacket of the combustion chamber, which can be obtained, for example, from the sea or from a separate cooling water reservoir.

As seen in the direction of the gas flow, the downstream or aft part of the combustion chamber carries in the inner cylinder a spray nozzle 23 through which the cooling water enters the cavity of the combustion chamber from the cooling water sleeve and is In the first step immediately after inert gas production, the inert gas is cooled.

It is thought that this allows the inert gas to be adjusted to a temperature that approximately corresponds to the temperature of the cooling water.

Thus, using cooling water of about 20°C will result in a gas temperature of about 20°C.

The cooling water is discharged downward and removed from a conventional gas-tight discharge passage 24.

The inert gas flows directly from both the combustion chamber and the cooling water gas separator into the scrubber 25 (washer and spray cooler) where it flows vertically upwards to be discharged at the top.

The cleaning device is filled with other suitable filler elements such as Raschig' J Song in a manner known per se.

The cooling water itself is supplied from above and is distributed over the cross-section of the cleaning device from suitable nozzles so as to flow in the opposite direction to the gas.

When the cooling water collects in the water reservoir of the cleaning device, this cooling water is sent by a pump into a commercially available cooling device such as a Freon cooling device, and from there the cooling water is returned to the cleaning device (Note: Freon CF2Cl2 ).

The inert gas is therefore indirectly cooled by supplying cooling water into the cooling device.

Thereafter, the cooling water comes into direct contact with the inert gas.

Even though this cooling device has high performance, it is made extremely compact.

In addition to its function of cooling chilled water, this cooling device can also perform other cooling functions, such as operating an air conditioning system or producing chilled drinking water.

Apart from this, a cooling device used for other purposes can also be used to cool this circulating water.

Due to the low water temperature within the cleaning device, the solubility of harmful gases is substantially increased.

At the head of the scrubber, inert gas is extracted continuously or intermittently for analysis and the fuel/combustion air ratio in the combustion chamber is adjusted based on this analysis.

Since the water in the washing device is circulated by a pump, it is conceivable to operate with the additives added using a dosing metering device such as a pump.

This additive from the compound has undesirable components contained in the gas.

If passed through a circulating system consisting of water, these additives cannot be removed in the same way as with continuous flow cooling water.

The temperature of the circulating cooling water is close to the freezing point, for example about 1° C. to 4° C., and the inert gas leaves the scrubber at approximately the same temperature as the circulating cooling water.

The "economical" effect of this system is obtained in this case, i.e. the cooling water, which has been heated to a negligible temperature, is reused in the cooling process and in view of the low temperature levels required for further cooling operations. , the cooling treatment of the once-through cooling water that would otherwise be necessary can be avoided.

The combustion chamber (Fig. 2) is cylindrical and only small in diameter.

Compared to those of the prior art, this combustion chamber has a significantly more coherent structure.

Apart from this, this combustion chamber configuration allows the production of inert gas under high pressure.

The combustion chamber can be made entirely of steel or stainless steel so that it remains gas-tight even at high pressures.

When relatively high-pressure inert gases are used, subsequent components such as the above-mentioned washing device and subsequent drying system also have a very small volume, resulting in a very well-organized system at low cost. can get.

The inert gas flows from the washing device to a pair of dry adsorption devices, known per se, filled with an adsorbent, hydrophilic material, for example silica gel, alumina gel or other suitable material, so that the dew point can vary from, for example, +300C to -20C. −
Adjustable to a range of up to 70°C.

Depending on the required dew point, which forms a basis for the water content present, a suitable desiccant is used.

In this case, the dew point of the mixture is so low that an increase in gas temperature is tempered by an almost complete drying effect for the desired purpose.

In terms of operation, each adsorber is operated alternately, while the other adsorber is continuously or intermittently regenerated while one adsorber is in operation.

As shown in Figure 1, the inert gas passes from the adsorption device shown on the left side of the figure first through opened valve 1 and then through valve 2.
utilizing con
nection).

A fraction of the dried or dehydrated gas is extracted from 9 and heated in a heater.

The gas then flows through the second adsorption device, which is now connected for regeneration, through the orifice valve 7 and then returns through the second orifice valve 8 into the combustion chamber, which is slightly pressurized by the blower.

Preferably, this connection line is opened in a part of the combustion chamber in which the combustion action has already ended, after which the first cleaning stage is carried out.

The blower may have a very low output speed to compensate for the loss of inert gas flow in the scrubber and in the adsorption device connected in series for diversion.

After the water is removed by the heated inert gas, the heater is deactivated and the cold inert gas is passed through an adsorption device where it is regenerated.

This cools the adsorbent back to operating temperature.

After the first adsorption device has been loaded, the second adsorption device is regenerated and the valve assumes the reverse position.

Valves 1 and 2 are closed, like valves γ and 8, and valves 3 and 4 are opened, like valves 5 and 6.

The inert gas stream then flows through valve 3 to the adsorption device on the right as shown in FIG. 1 and then through valve 4 to the utilizing point.

Also, at 9, a branched stream is extracted and heated with a heater.

This substream then passes through valve 5, which is now open, to the left adsorption device (FIG. 1) and from there it is led again through valve 6 to the blower.

Since the regeneration effect is effected by the previously dried or dehydrated inert gas, this regeneration effect can be carried out in a shorter time than in conventional adsorption devices which are dried by heated atmosphere.

Conventional adsorption devices still contain extremely large amounts of water, especially in tropical regions.

The dimensions of these adsorbers are also large, since by appropriate selection of the branched (partial) gas streams and by increasing the temperature, a changeover from one adsorber to the other can be carried out at short intervals. can be reduced to

Regeneration with inert gas is more economical than regeneration with atmospheric air.

This is because, in the case of atmospheric regeneration, it is first necessary to heat the atmosphere to a very high temperature, which causes high stresses in the material.

Moreover, the inert gas used for the regeneration operation is fed back again, so that gas losses can be avoided.

In the second stage, the cooling of the inert gas produced approaches the temperature near the freezing point, so that the removal of sulfur dioxide gas SO2 is already obtained to a very high extent at this point.

Experience has shown that the devices described above can be operated at lower temperatures than conventional inert gas production devices.

Moreover, the use of high gas pressures is possible.

Therefore, this method is superior to the conventional method.

Furthermore, this method allows the use of fuel oils with high sulfur content.

The cleaning efficiency of a cleaning device is generally greatly improved by the addition of additives that greatly increase the cleaning water adsorption capacity.

For example, when diluted lye or washing liquid is added, this converts the sulfur dioxide gas SO2 in the product gas to soluble compounds.

FIG. 3 shows another embodiment of this inert gas production device,
Here, a multi-stage or two-stage combustor 20 is arranged in a closed cylindrical housing on the left side of the figure, which combustor is used to burn hydrocarbons, in particular fuel oil.

The atomizing medium (air, gas, inert gas or steam) is supplied via pipe 42.

To preheat this atomizing air, the pipe 42 is passed through the combustion chamber.

Combustion air is supplied to the combustion device 20 in parallel through conduits or pipes 30.

The generated flame and high-temperature combustion gas are removed from the enlarged section.
ment) 43 through the inner cavity of the combustion chamber itself (
1nterior 5pace) Enter within 22.

The inner cavity 22 of the combustion chamber has a cylindrical form and is surrounded by a double water cannula or shell 21, which acts as a cooling wall of the inner cavity and at the same time contains the cooling water sprayed by the atomizing element. Acts as a supply device.

In particular, in ships, cooling water is obtained from the sea or from another suitable cooling water storage tank.

The part of the 2M water cannula 21 at the rear in the direction of the gas flow is equipped with spray nozzles 23 on its inner part, the details of which are shown in FIG.

The water enters the inner cavity 22 in the form of a sub-stream through the atomizing nozzle 23, thereby creating an initial impulse cooling effect of the hot combustion gases.

In the first embodiment, the cooled inert gas is then passed through the cleaning device, but in the embodiment according to FIG. 3 a different mode of operation is used.

As can be seen from FIG. 3, the second cooling cavity 45 is fitted around the double water cannula and the hole (b) in the combustion chamber itself, so that the walls of the cooling cavity 45 are against the double water cannula 21. It forms a concentrically arranged cylinder which surrounds at least the rear part of the combustion chamber itself.

Combustion chamber and second? /+Since the cooling space is inclined with respect to the horizontal, there is a lowest point in the cooling space.
) exists.

A gas-tight drain 24 is provided in such a lowest point area.

The front and rear walls of the second cooling cavity 45 are end walls 46, 47.
It is blocked by

A so-called manhole 48 is provided in the end wall 47, through which the second cooling cavity and the interior of the inner cavity 22 of the combustion chamber can be accessed.

As shown in Figure 3, the cooled combustion gas is transferred to the inner cavity 2.
The flow from the second spray head [49] into the second cooling cavity where the direction of the spray is reversed and these spray heads (5pray
heads) through a second spray nozzle system comprising 10 heads.

Details of this spray head are shown in FIG.

As the inert gas flows along the spray head 10, it passes through the stream of spray water a second time, thereby further cooling the inert gas.

During the passage through the spray ice, the gas is also washed, in particular the sulphurous acid gas SO2 contained therein is substantially removed.

In the region of the spray head 10, the velocity of the inert gas is considerably reduced compared to the velocity in the combustion chamber itself, so that this gas carries only a small amount of cooling water.

The condensed cooling water reaches the lowest point of the cooling cavity 45 and then flows into the drainage system 24 as described above.

The dried inert gas (dew point near the cooling water temperature, i.e. about 30°C) is discharged into the discharge section 11 including the water droplet separator 12.
O flows from the assembly point or into a separate drying circuit as described in detail in connection with FIG. 1 to the spray head 10 in a double water cannula 21, as shown in FIGS. Cooling water is supplied.

Therefore, the complexity of this inert gas generator is further increased since a second water circuit is not required.

The spray head 10 includes an elongated cylindrical tube 13 screwed into a double water cannula, which tube is provided with sharp-edged slots 14,'15 extending transversely to the tube axis.

These slots are oriented against the direction of incoming inert gas flow.

The tubes have different heights to ensure that the cooling water in the second cooling cavity covers this cavity with the best possible evenness and completeness.

It is expected that the inert gas at the end of the inner cavity of the combustion chamber (child [49)] has a temperature of about 200 C higher than the temperature of the cooling water.

When flowing through the second cooling cavity, the inert gas is again cooled by the trickled (atomized) cooling water to a temperature approximately corresponding to the cooling water temperature.

The complete infiltration of the cooling water into the inert gas also makes this gas almost free of sulfur dioxide.

Furthermore, the rapid and complete discharge of the sprayed and entrained cleaning water ensures that corrosion in the area of the spray nozzle and the second cooling cavity is almost completely avoided.

Thereby, water drainage can be achieved both in an inclined arrangement according to FIG. 3 and in a vertical arrangement of the production device, as required in various equipment cases.

Since the spray system can already operate at a water pressure of 0.3 to 0.5 N/Crj (atmospheric pressure), this pressure must exceed the pressure of the inert gas.

This pressure can then be generated in any desired system by a simple pump.

FIG. 6 shows another embodiment of the spray cooling device.

In this case, the second cooling cavity 45 has a partition provided by a partially open wall 31 .

The greatly cooled and purified gas flows through this hole 32 into a separate cooling cavity or chamber 33 which is likewise provided with a spray head 34 .

However, the cooling water sprayed by the spray head 34 does not flow into the discharge part 24, but flows into another discharge part 35, and from there flows into the pump 36 and the cooling device 37, where the cooling water is heated to about O0C. is cooled to a temperature of

The further cooled cooling water then returns to the spray head 34.

This low temperature cooling water further lowers the dew point of the inert gas.

Therefore, the structure selected here shows an easily reproducible property that provides further quality improvement of the produced inert gas.

Some examples of aspects of this invention are as follows.

2. A method according to claim 1, characterized in that: (1) the washing and cooling fluids are cooled again after recovery and are recycled or sent back to the production process.

2. After the inert gas flows through the adsorption drying device, 1
Two sub-streams are continuously or intermittently branched off from this inert gas, and when this sub-stream is heated it passes through the other drying device for regeneration action and is thereby recycled into the gas stream of the combustion chamber. A method according to claim 1 or aspect 1, characterized in that:

3. Process according to embodiment 1, characterized in that the water-soluble additive is added to the circulating wash water or the cooling water of the additional spray cooling stage.

4. The method according to aspect 3, wherein an additive that lowers the freezing point is added.

5. The method according to the above aspect 3, characterized in that an additive that forms a compound with an undesirable component contained in the gas is added.

6. Claim 1 characterized by a combustion chamber cooling water mantle that allows cooling water to flow into the spray head at the end of the combustion chamber.
and the method described in Aspects 1 to 3 above.

7. Claim 1, characterized in that said first and second cooling stages are carried out as spray cooling by means of a stream of cooling water, preferably delivered from a single source. The method described in section.

8. The method of claim 7, wherein the first and second cooling stages are performed within the combustion chamber and an extension of the combustion chamber.

9. A method according to aspects 7 and 8, characterized in that the velocity of the inert gas in the second cooling chamber or in the extension of the combustion chamber is reduced to at least 25 Da of the velocity in the combustion chamber.

10. As a cleaning device, a cleaning device is provided with a preceding cooling device for cooling and cleaning water arranged downstream of the combustion chamber and pumped into it, and this device The installation according to claim 2, characterized in that they are followed by an adsorption drying device known per se, in which a pair of adsorption drying devices connected in parallel are provided, which drying devices are arranged alternately. characterized in that one is connected to dry the inert gas, while the other is connected to be branched from the dried inert gas and regenerated by the branched gas stream heated in the heater. An apparatus according to claim 2.

12. The apparatus according to the above aspect 11, characterized in that the regenerated adsorption apparatus is cooled back to the operating temperature by a cooled inert gas after the regeneration.

13. A connecting line including a blower between the adsorption drying device and the combustion chamber and opening into the combustion chamber preceding the spray cooling zone for reintroducing the inert gas used for the regeneration operation. The apparatus according to claim 2 and any one of the preceding aspects 11 to 12, characterized in that:

14, enclosing at least a portion of the combustion chamber hole or mouth 49 and the water cannula 21 of the combustion chamber, and an inner cavity 2 of the combustion chamber;
Claims characterized in that the second cooling cavity 45 is closed and contains an inert gas flowing through and coming from the cooling cavity 2, whereby the gas flowing through the cooling cavity 45 is mixed with the spray water. Apparatus according to paragraph 3.

15. The second cooling cavity 45 is formed as a cylinder concentrically closed with the double water jacket 21 of the combustion chamber.
Equipment described in Section.

16. The device according to aspects 14 and 15, characterized by a spray nozzle 23 or a spray head 10, respectively, mounted in or directly on the wall of the double water cannula.

17. An elongated tube 13 forming the atomizing element of the atomizing head 10 and having slots 14, 15 extending at right angles to the tube axis and crossing the cross-section of the tube as chords; Characteristic aspect 1
The device according to item 6.

18. The combustion chamber is inclined with respect to the horizontal and is surrounded by the second cooling cavity 45, and the cooling chamber 4
1. Any one of the above aspects 14 to 16, characterized in that the drainage part used for the used cooling water is located at the lowest point of the cooling water.
Equipment described in Section.

19. Device according to claim 3, characterized in that a portion of the cooling water is circulated in a separate cooling circuit.

20, the part 33 of said second cooling cavity through which gas continues to flow;
20. Apparatus according to claim 19, characterized in that the apparatus has collecting and discharging devices 31, 35, by means of which the cooling water to be separated and discharged can be separated from the remainder of the cooling water stream.

21. According to claim 3, characterized in that the gas stream, upon its discharge from the second cooling cavity, is passed through a third cooling cavity configured as a spray or irrigation cooling device. Device.

[Brief Description of the Drawings] Fig. 1 is a diagram of one embodiment of an inert gas production device according to the present invention, Fig. 2 is a combustion chamber, and Fig. 3 is an inert gas production according to another embodiment of the invention. 4 shows the spray nozzle directed into the inner cavity of the combustion chamber, FIG. 5 shows the spray head directed into the inner cavity of the second cooling chamber, and FIG. 6 shows the other parts of the spray cooling device. An example is shown. 1-8...Valve, 9...Extraction point (see Figure 1 above), 10...Spray head, 11...
Discharge part, 12... Separator, 13... Cylindrical tube, 14, 15... Slot hole, 20...
...Combustor, 21...Double water mantle, 22-...
... Inner cavity, 23 ... Spray nozzle, 24.
...Discharge section, 30...Pipe, 31...
...Partition wall, 32...hole, 33...
Cooling space, 34...Spray head, 35...
・Individual discharge section, 36...Pump, 37...
...Cooling device, 42...Pipe, 43...
...Expansion section, 45...Second cooling space, 46,4
7... End wall, 48... Manhole, 4
9-... Hole.

Claims (1)

[Claims] 1. When liquid or gaseous hydrocarbons are combusted together with air and then the high-temperature combustion gas is spray-cooled to produce an inert gas, (a) the combustion is surrounded by a water canopy; (b) The hot combustion gases immediately after combustion are carried out in a spray cooling zone connected to and following the combustion zone, spaced around the spray cooling zone. Spray cooling is carried out using a plurality of spray nozzles, (/→ supplying said water cannula with cooling water flowing through the spray cooling process, and) cooling the gas from the spray cooling zone with an aqueous medium at a temperature near the freezing point. and a method for producing an inert gas, which comprises washing. 22 double water cannula type combustion chamber 22 through which cooling water flows and a spray nozzle 23 adjacent to the gas outlet for discharging the cooling water from said double water cannula into the inner cavity of the combustion chamber. An inert gas production device characterized in that it is provided in an inner cylindrical part of a combustion chamber, and is further followed by a washing device and a drying device. 3.32 double water cannula combustion chamber, the water cannula containing a cooling water flow therethrough, and having a spray nozzle adjacent the gas outlet for discharging the cooling water from the double water cannula into the inner cavity of the combustion chamber; a second cooling cavity 45 adjoining the inner cavity 22 of the combustion chamber and having a spray device 10, 23 arranged in its walls, the spray device being supplied with cooling water flowing through the double water cannula 21; An inert gas production device characterized by having.