Method of stepwise firing with optimised injection of primary oxidiser

FIELD: heating.

SUBSTANCE: invention relates to power engineering. The proposed method of fuel firing with oxygen-containing gas wherein fuel jet is injected and, at least, two jets of oxygen containing gas that features high oxygen content. Note here that the 1st jet of aforesaid gas, called a primary jet, is injected to allow its contact with the fuel jet and to form the 1st incomplete firing. Note here that outlet gases, thereafter, contains, nevertheless, at least, one fraction of fuel. Note also that the 2nd aforesaid jet is injected at the distance from the fuel jet to allow firing together with the said 1st fuel fraction existing in outlet gases after 1st firing. The oxidiser primary jet is divided into two primary jets, that is, 1st primary jet, called the central primary oxidiser jet injected into fuel jet centre and 2nd primary jet called the embracing primary jet injected coaxially and around the fuel jet. The rate of the oxidiser central primary jet injection exceeds that of fuel jet injection. The fuel jet injection rate exceeds that of the 1st embracing oxidizer injection. The oxidiser 2nd jet injection rate exceeds that of the oxidiser embracing primary jet. The distance between the oxidiser central primary jet injection and its 2nd jet injection vs the rate of injection of the oxidiser 2nd jet varies between 10-3 and 10-2. The oxidiser 3rd jet is injected at the point located between the point of injecting the oxidiser central primary jet and that of injecting 2nd oxidising jet. The rate of injecting oxidiser 2nd jet exceeds that injecting oxidiser 3rd jet. The distance between the point of injecting oxidiser 2nd jet and that of injecting oxidiser central primary jet vs the distance between the point of injecting oxidiser 3rd jet and that of injecting oxidiser primary jet varies from 2 to 10. Two primary oxidiser jets feature identical oxygen concentration. The oxidizer central primary jet oxygen concentration exceeds that of oxidiser embracing primary jet.

EFFECT: higher furnace reliability.

10 cl, 1 dwg

 

The present invention relates to a method of staged combustion using primary jet of oxidizer and secondary jet of oxidizer, in which the injection of the primary oxidant is optimized.

Characteristics of combustion in industrial furnaces must meet two criteria:

- limit the release of pollutants (NOx, dust etc), which should be quantitatively less than the limit established by the law,

to control the temperature of the walls of the furnace and subject to heating of the charge to meet the limitations as quantity of the product subjected to combustion and energy consumption. The preferred solution to meet these two criteria is to reduce the temperature of the burning flame, and one of the means - stage combustion. Method of stepped combustion contains the division of the amount of oxidant required for complete combustion of the fuel, at least two of the stream of oxidant introduced at various distances from the stream of fuel. Thus, the first flow of oxidant injected very close to the fuel flow. This thread is the closest to the fuel flow, called primary flow; it allows partial combustion of the fuel at a controlled temperature, which limits the formation of NO x.Other streams of oxidizer injected at a greater distance from the fuel than the primary oxidant stream; they allow complete combustion of the fuel, which is not reacted with the primary oxidant. These threads are called secondary flows. In document WO 02/081967 described method, describing the possibility of using this type of way of staged combustion. The oxidizer is divided into three separate streams, which are injected at different distances from the point of fuel injection and at different speeds. Thus, the first jet of oxidant injected with high velocity in the center of the jet fuel. Then the second jet of oxidant injected with a lower rate at the first distance from the jet fuel. Finally, the third stream of oxidant injected at the second distance from the jet fuel, and this is the second distance greater than the first distance.

It may be useful ways to use this type with different capacity of the burner, for example, when changing the charge in the furnace. Thus, it may be desirable to use burners low power, that is, the use of burners with low speed fuel relative to the nominal mode burners. Then use burners with low speed fuel relative to the nominal mode can lead to a rise in flame: when the injection of the processes in the fuel and oxidizers in the horizontal plane flame rises to the roof of the industrial furnace and can damage it.

The present invention is to provide a method staged combustion, which has the possibility of modifying the power of the burner, and, in particular, reducing its relative to its rated capacity, without this change of power, leading to the change of direction of the flame and damage the walls of the furnace.

For this purpose, the method of burning fuel spray jet fuel and at least two jets of oxidant, and the first jet of oxidant, called primary flow, the spray so that it was in contact with jet fuel and created the first incomplete combustion and gases arising from this first combustion still contain at least part of the fuel and the second stream of oxidant injected at a distance from the jet fuel, therefore, to burn with a part of the fuel present in the gases resulting from the first combustion, in which the primary jet of oxidizer divided two main streams:

the first primary jet of oxidizer, called Central primary jet injected in the center of the jet fuel, and

the second primary jet of oxidizer, called covering jet injected coaxially around the jet fuel.

The invention therefore relates to a method of staged combustion in which the oxidant required for combustion of the fuel is divided into two streams, the First stream, called primary jet squirt into contact with jet fuel, which means that the distance between the jet of fuel and primary oxidant stream is equal to zero (except for the possible presence of the walls of the channel conducting these different streams). Essential characteristic of the invention the primary jet of oxidizer is divided into two streams, injected separately from the jet fuel. The first primary jet fuel, called Central jet injected in the center of the jet fuel and the second primary jet of oxidizer, called covering primary jet injected coaxially around the jet fuel. In practice, this method can be applied by use of the injection pipe, consisting of two concentric tubes, one for the fuel injection, the other for the Central primary oxidant. The injection pipe is placed in a ceramic refractory recess and covering the primary oxidant injected into the gap formed between the refractory embrasure and injection pipeline. The end of the injection pipe may be pushed back or be in the same plane as the injection wall in the furnace.

According to the invention the amount of oxidant present in the primary jet of oxidizer, less than the full amount of oxidant required for complete cornucopia. The second stream of oxidant allows the supply amount of oxidant required for complete combustion. The second stream of oxidant injected at a distance from the second primary jet of oxidizer, which means that the distance between the two jets is not zero. This distance is preferably at least 80 mm, even more preferably at least 90 mm. In total, the sum of all injected oxidants is essentially stoichiometric, i.e. in the range of15% relative to the stoichiometric amount required for complete combustion of the fuel. The amount of the second oxidant is usually 10-98% of the total number of injected oxidant, preferably 50-98%, even more preferably 75-98%, and the primary oxidant (which corresponds to the Central primary oxidant, and covering the primary oxidant) is the number, in the range of 2 to 90%, preferably from 2 to 50%, even more preferably from 2 to 25% of the total amount of oxidant.

According to the invention it is preferable that the speed of injection of the Central primary jet of oxidizer was greater than the rate of injection of the jet fuel. Through this property, the Central jet of oxidizer provides a good transfer of the article the AP fuel and a sufficiently high speed of the jet fuel. Thus, the ideal fuel is passed through the combustion zone with the second oxidant. The rate of injection of the Central primary jet of oxidizer is typically at least 50 m/s, preferably is between 50 and 150 m/s the Speed of the injection jet fuel is preferably greater than the speed of injection covering primary jet of oxidizer, even more preferably from 5 to 15 m/s In the preferred variant implementation, the speed of injection of the secondary jet of oxidizer may be greater than the rate of injection covering primary jet of oxidizer.

According to the invention the distance at which inject the second stream of oxidant, and the speed of the second jet of oxidizer is preferably such that the ratio of the distance defined between the point of injection of the Central primary jet of oxidizer and the point of injection of the second stream of oxidant to the speed of injection of the second jet of oxidizer is between orders of 10-3and 10-2preferably between 310-3and 8.510-3. This attitude solves the problem of the invention, while providing a low allocation of NOxand improved the brightness of the flame, giving the operator a visual observation of the burning.

Specific variant of the implementation of the management method according to the invention, the third stream of the oxidant can be injected at a point between the point of injection of the Central primary jet of oxidizer and the point of injection of the second oxidizing jet. The advantage of this third injection of oxidizing jet is that it allows the variation of the flow rates between the second and third streams of oxidizer and modification time of the burner and the flame length to control the distribution profile of the charge. Preferably, the speed of injection of the second jet of oxidizer was greater than the speed of injection of the third stream of the oxidant or equal to it. Observations have shown that it is preferable that the ratio of the distance defined between the point of injection of the second jet of oxidizer and point injection Central primary jet of oxidizer to the distance defined between the point of injection of the third jet of oxidizer and point injection Central primary jet of oxidizer were between 2 and 10. In the case of this particular variant of implementation, the amount of oxidant present in the third stream is preferably 50-75% of the total amount of oxidant injected by the second and third jets, and that the full amount of oxidant injected in the second and third jets, is 10-98% of the total number of itracku is imago oxidant, preferably 50-98%, even more preferably 75-98%. According to the invention the distance at which inject a third stream of oxidant, and the speed of the third jet of oxidizer is preferably such that the ratio of the distance defined between the point of injection of the Central primary jet of oxidizer and the point of injection of the third jet of oxidant to the speed of injection of the third jet of oxidizer is between 610-4and 610-3, preferably between 1.510-3and 410-3.

In the first embodiment of the method according to the invention two primary jet of oxidizer have the same oxygen concentration. Therefore, it is also preferable to use the oxidizing agent in the second stream, and optionally in a third stream having the same composition as the first jet, as it is possible to separate only one source of oxidant between different points of injection of the oxidants.

However, according to the second variant of the method according to the invention, the oxygen concentration in the Central primary jet of oxidizer may be greater than the concentration of oxygen in covering the primary jet of oxidizer and the second and third jets. This may be the case, when the flow of pure oxygen is limited. Therefore, the oxidant with a high concentration of oxygen injected in the form of a Central primary with the Rui oxidant, while the air is injected in all other streams of oxidizer.

Stream of the second oxidant may itself consist of multiple jets of the second oxidizer. To ensure a good symmetry of the device burning stream of the second oxidant preferably evenly placed around the jet of fuel and primary oxidant. This layout can also be applied to the third jet of oxidizer.

The method is preferably used with gaseous fuel. If the fuel is liquid, it is desirable to have used the spray gas for atomizing the liquid; the invention of the atomizing gas may be an oxidant, in particular air or oxygen. The atomizing gas may be injected instead of covering the oxidant and/or instead of a Central oxidizer.

Finally, the invention relates to the use of the above-mentioned method for heating glass of the charge or for the furnace.

Application of the method according to the invention gives the possibility of obtaining a dense flame, that is, the task of obtaining a flame, which is not rejected against the wall of the furnace.

The drawing shows a device for implementing the method according to the invention. Figure 1 presents a plot device, which is designed symmetrically with respect to axis a-a'. The drawing shows a front view of the device and is suitable is a section along the axis B-B'

The device consists of a refractory embrasures 5, 6, 7, punched in the wall of the furnace 8, and the injection pipe 9, consisting of two coaxial tubes. The injection pipe is placed in a refractory recess 5. This refractory loophole wide enough for the existence of a free gap 10 between the outer pipe of the pipe and the refractory wall embrasures. The primary oxidizer 2, 3 inject as in the Central tube of the pipe 9 and in the space 10. Fuel 1 injected into the gap formed between the inner pipe and outer pipe injection pipe 9. The second oxidizer 4 inject in refractory recess 7, the farthest from the Central refractory embrasures 5. The third 11 oxidant injected in the intermediate refractory recess 6.

1. A method of burning fuel, which inject a stream of fuel and at least two jets of oxidant, and the first jet of oxidant, called primary flow, the spray so that it was in contact with jet fuel and created the first incomplete combustion and gases arising from this first combustion still contain at least part of the fuel and the second stream of oxidant injected at a distance from the jet fuel, thus to burn together with part of the fuel present in the gases arising from Pervov the combustion characterized in that the primary jet of oxidizer is divided into two primary streams:
the first primary jet of oxidizer, called Central primary jet injected in the center of the jet fuel, and
the second primary jet of oxidizer, called covering primary jet, injected coaxially around the jet fuel.

2. The method according to claim 1, characterized in that the speed of injection of the Central primary jet of oxidizer more speed injection jet fuel.

3. The method according to claim 1 or 2, characterized in that the speed of the injection jet fuel more speed injection covering primary jet of oxidizer.

4. The method according to claim 1, characterized in that the speed of injection of the second oxidant jet more speed injection covering primary jet of oxidizer.

5. The method according to claim 1, characterized in that the ratio of the distance between the point of injection of the Central primary jet of oxidizer and the point of injection of the second jet of oxidizer to the speed of injection of the second jet of oxidizer is between the order of 10-3and 10-2.

6. The method according to claim 1, characterized in that the third jet of oxidant injected at a point between the point of injection of the Central primary jet of oxidizer and the point of injection of the second oxidizing stream.

7. The method according to claim 6, great for the decomposing those the speed of injection of the second jet of oxidizer is more than speed of injection of the third jet of oxidizer.

8. The method according to claim 6, characterized in that the ratio of the distance between the point of injection of the second jet of oxidizer and point injection Central primary jet of oxidizer to the distance between the point of injection of the third jet of oxidizer and point injection Central primary jet of oxidizer is between 2 and 10.

9. The method according to claim 1, characterized in that the two primary jet of oxidizer have the same oxygen concentration.

10. The method according to claim 1, characterized in that the oxygen concentration of the Central primary jet of oxidizer more oxygen concentrations covering the primary jet of oxidizer.

11. The method of heating the glass batch or the furnace, characterized in that the use of the method according to one of claims 1 to 10.



 

Same patents:

FIELD: power engineering.

SUBSTANCE: method of fuel combustion when at least one fuel and at least two oxidants are injected: the first oxidant is injected at I1 distance equal to 20 cm at maximum and preferably 15 cm at maximum from point of fuel injection. The second oxidant is injected at I2 distance from point of fuel injection while I2 is greater than I1. Oxidants are injected in such amounts that sum of their amounts is equal to at least stoichiometric amount of oxidant required to provide combustion of injected fuel. The first oxidant is oxygen-enriched air at maximum temperature of 200 C, and the second oxidant is air preheated to temperature of at least 300 C. Air is enriched with oxygen so that oxygen concentration in enriched air is at least 30%. Oxygen-enriched air is obtained by mixing ambient air with oxygen from cryogenic source. Preheated air is heated by means of heat exchange using part of hot combustion products. At least two oxidants are injected at I1 distance equal to 20 cm at maximum and preferably 15 cm at maximum while one oxidant called primary is injected mixed with fuel or near fuel and another oxidant called secondary is injected at distance from fuel. Amount of oxidant injected by means of primary oxidant jet ranges from 2 to 50% of oxygen stoichiometric amount required to provide combustion of injected fuel. The secondary oxidant is separated into multiple jets of secondary oxidant. The second oxidant injected at distance I2 is separated into multiple jets of oxidant.

EFFECT: fuel combustion using oxygen as oxidant suitable for retrieving energy from furnace gases.

8 cl

FIELD: the invention refers to the technology of using a cumulative jet.

SUBSTANCE: the mode of formation of at least one cumulative jet includes feeding of at least one gas jet out of at least one nozzle with a converging/diverging configuration located in an injector having a face surface of the injector. At that the face surface of the injector has openings located along the circumference around at least one nozzle, moreover the indicated at least one gas jet has a supersonic speed when it is formed at the output from the face surface of the injector and remains supersonic on a distance coming to at least 20d, where d- the diameter of the output opening of the indicated at least one nozzle. Feeding of fuel from the first group of openings located along the circumference and feeding of an oxidizing agent from the second group of openings located along the circumference. Incineration of fuel and the oxidizing agent fed from the first and the second groups of openings located along the mentioned circumference for formation of a flame shell around at least one gas jet. A great number of gas jets are fed from the injector. The fuel and the oxidizing agents are fed from the first group of openings and from the second group of openings correspondingly alternate with each other on the circumference along which they are located. At least one gas jet, the fuel and the oxidizing agent are fed from the injector directly into the space for injection without passing the zone of recycling formed with the extender of the injector. At least one gas jet passes at a prescribed distance coming at least to 20d, where d- is the diameter of the output opening of the nozzle from which exits a gas jet keeping the diameter of the mentioned gas jet in essence constant.

EFFECT: the invention allows make an arrangement with the aid of which it is possible to form effective cumulative gas jets without need in an extender in the injector or in any other element for forming recycling zone for gases fed from the injector.

9 cl, 3 dwg

FIELD: power engineering.

SUBSTANCE: method comprises injecting at least one type of fuel and at least one oxidizer. The primary oxidizer is injected together with the fuel to generate first incomplete burning. The gases emitting from the first burning comprises at least a part of the fuel, whereas the secondary oxidizer is injected downstream of the site of the fuel injection at a distance larger than that between the fuel injection and primary oxidizer closest to the fuel injection so that to be burnt out together with the fuel part. The flow of the first oxidizer is branched into at lest two primary flows.

EFFECT: reduced emission of nitrogen oxides.

40 cl, 8 dwg

The invention relates to a method for partial oxidation of hydrocarbons and gaseous mixtures containing hydrogen and carbon monoxide

Gas burner // 2213300
The invention relates to a power system, can be used in stoves for burning gaseous fuel and improves the reliability and durability of the burner, to exclude the output of the fuel outside the torch

Hearth burner // 2211403
The invention relates to bottom (horizontal slot) single tube burners with forced air for combustion of gaseous fuel and can be used in heating sectional boilers, Asilah, etc

The invention relates to techniques using coherent jet

The invention relates to a method of burning hydrogen and the burner for the combustion of hydrogen

The invention relates to a ceramic gas burner stove shaft furnace

FIELD: power engineering.

SUBSTANCE: method comprises injecting at least one type of fuel and at least one oxidizer. The primary oxidizer is injected together with the fuel to generate first incomplete burning. The gases emitting from the first burning comprises at least a part of the fuel, whereas the secondary oxidizer is injected downstream of the site of the fuel injection at a distance larger than that between the fuel injection and primary oxidizer closest to the fuel injection so that to be burnt out together with the fuel part. The flow of the first oxidizer is branched into at lest two primary flows.

EFFECT: reduced emission of nitrogen oxides.

40 cl, 8 dwg

FIELD: the invention refers to the technology of using a cumulative jet.

SUBSTANCE: the mode of formation of at least one cumulative jet includes feeding of at least one gas jet out of at least one nozzle with a converging/diverging configuration located in an injector having a face surface of the injector. At that the face surface of the injector has openings located along the circumference around at least one nozzle, moreover the indicated at least one gas jet has a supersonic speed when it is formed at the output from the face surface of the injector and remains supersonic on a distance coming to at least 20d, where d- the diameter of the output opening of the indicated at least one nozzle. Feeding of fuel from the first group of openings located along the circumference and feeding of an oxidizing agent from the second group of openings located along the circumference. Incineration of fuel and the oxidizing agent fed from the first and the second groups of openings located along the mentioned circumference for formation of a flame shell around at least one gas jet. A great number of gas jets are fed from the injector. The fuel and the oxidizing agents are fed from the first group of openings and from the second group of openings correspondingly alternate with each other on the circumference along which they are located. At least one gas jet, the fuel and the oxidizing agent are fed from the injector directly into the space for injection without passing the zone of recycling formed with the extender of the injector. At least one gas jet passes at a prescribed distance coming at least to 20d, where d- is the diameter of the output opening of the nozzle from which exits a gas jet keeping the diameter of the mentioned gas jet in essence constant.

EFFECT: the invention allows make an arrangement with the aid of which it is possible to form effective cumulative gas jets without need in an extender in the injector or in any other element for forming recycling zone for gases fed from the injector.

9 cl, 3 dwg

FIELD: power engineering.

SUBSTANCE: method of fuel combustion when at least one fuel and at least two oxidants are injected: the first oxidant is injected at I1 distance equal to 20 cm at maximum and preferably 15 cm at maximum from point of fuel injection. The second oxidant is injected at I2 distance from point of fuel injection while I2 is greater than I1. Oxidants are injected in such amounts that sum of their amounts is equal to at least stoichiometric amount of oxidant required to provide combustion of injected fuel. The first oxidant is oxygen-enriched air at maximum temperature of 200 C, and the second oxidant is air preheated to temperature of at least 300 C. Air is enriched with oxygen so that oxygen concentration in enriched air is at least 30%. Oxygen-enriched air is obtained by mixing ambient air with oxygen from cryogenic source. Preheated air is heated by means of heat exchange using part of hot combustion products. At least two oxidants are injected at I1 distance equal to 20 cm at maximum and preferably 15 cm at maximum while one oxidant called primary is injected mixed with fuel or near fuel and another oxidant called secondary is injected at distance from fuel. Amount of oxidant injected by means of primary oxidant jet ranges from 2 to 50% of oxygen stoichiometric amount required to provide combustion of injected fuel. The secondary oxidant is separated into multiple jets of secondary oxidant. The second oxidant injected at distance I2 is separated into multiple jets of oxidant.

EFFECT: fuel combustion using oxygen as oxidant suitable for retrieving energy from furnace gases.

8 cl

FIELD: heating.

SUBSTANCE: invention relates to power engineering. The proposed method of fuel firing with oxygen-containing gas wherein fuel jet is injected and, at least, two jets of oxygen containing gas that features high oxygen content. Note here that the 1st jet of aforesaid gas, called a primary jet, is injected to allow its contact with the fuel jet and to form the 1st incomplete firing. Note here that outlet gases, thereafter, contains, nevertheless, at least, one fraction of fuel. Note also that the 2nd aforesaid jet is injected at the distance from the fuel jet to allow firing together with the said 1st fuel fraction existing in outlet gases after 1st firing. The oxidiser primary jet is divided into two primary jets, that is, 1st primary jet, called the central primary oxidiser jet injected into fuel jet centre and 2nd primary jet called the embracing primary jet injected coaxially and around the fuel jet. The rate of the oxidiser central primary jet injection exceeds that of fuel jet injection. The fuel jet injection rate exceeds that of the 1st embracing oxidizer injection. The oxidiser 2nd jet injection rate exceeds that of the oxidiser embracing primary jet. The distance between the oxidiser central primary jet injection and its 2nd jet injection vs the rate of injection of the oxidiser 2nd jet varies between 10-3 and 10-2. The oxidiser 3rd jet is injected at the point located between the point of injecting the oxidiser central primary jet and that of injecting 2nd oxidising jet. The rate of injecting oxidiser 2nd jet exceeds that injecting oxidiser 3rd jet. The distance between the point of injecting oxidiser 2nd jet and that of injecting oxidiser central primary jet vs the distance between the point of injecting oxidiser 3rd jet and that of injecting oxidiser primary jet varies from 2 to 10. Two primary oxidiser jets feature identical oxygen concentration. The oxidizer central primary jet oxygen concentration exceeds that of oxidiser embracing primary jet.

EFFECT: higher furnace reliability.

10 cl, 1 dwg

FIELD: heating.

SUBSTANCE: invention relates to powder engineering. The method of fuel firing with oxygen-containing gas wherein fuel jet is injected and, at least, two jets of oxygen containing gas that features high oxygen content. Note here that the 1st jet of aforesaid gas, called a primary jet, is injected to allow its contact with the fuel jet and to form the 1st incomplete firing. Note here that outlet gases, thereafter, contains, nevertheless, at least, one fraction of fuel. Note also that the 2nd aforesaid jet is injected at the distance of l1 from the fuel jet to allow firing together with the said 1sr fuel fraction existing in outlet gases after 1st firing. Oxygen containing gas with low oxygen content is injected at the distance l2 from the fuel jet providing the firing together with the said outlet gases after 1st firing, where l2>l1.

EFFECT: firing gas with low oxygen content.

25 cl, 1 dwg

FIELD: heating systems.

SUBSTANCE: invention refers to gas burners with separate air and gaseous fuel supply. The effect is achieved in gas burner (1) containing main metal housing (6), an inner tube for fuel gas, at least two outer tubes (10) for fuel gas, single tube (8) for supplying pre-heated air, fuel gas supply control system, refractory block (30) and a group of nozzles (20) which are located in a circumferential direction coaxially in relation to inner tube and meant for spraying pre-heated air into combustion chamber.

EFFECT: limit reduction of NOx concentration in exit combustion products.

29 cl,13 dwg

FIELD: heating.

SUBSTANCE: invention related to energy, particularly to burner devices and can be used in gas turbine equipment. Burner device consists of a case (1), a fuel nozzle (2), a front device (3), a fire tube (4). The burner device belongs to gas-turbine engine combustion chamber. The front device executed with holes for fuel nozzles installation (2). The fire tube (4) with the front device (3) located inside of the combustion chamber cage (5). Fuel nozzles (2) connected to a gas ring collector (6). In combustion chamber fire tube and cage (5) between wall area air nozzles (7) located radically. Air nozzles (7) connected to the common ring air collector (9). The air collector (9) located in the case (1).

EFFECT: invention allows to regulate primary air supply to the combustion chamber section during equipment operation, burning device design simplification, it operation safety stays constant, possibility of device change on the running gas turbine equipment.

1 dwg

FIELD: heating.

SUBSTANCE: invention relates to fuel combustion process. Fuel combustion method is implemented by means of oxygen-containing gas with high oxygen content, in accordance with which to combustion chamber there sprayed is fuel jet and at least two jets of oxygen-containing gas; at that, the first or primary jet of oxygen-containing gas is supplied through the hole having diametre D and sprayed around the above fuel jet in such quantity which allows providing the first incomplete fuel combustion; at that, gases formed as a result of the above first combustion contain at least some part of unburnt fuel, and the second jet of oxygen-containing gas introduced through the hole having diametre d and located at some distance 1 from the hole of introduction of the first or primary jet of oxygen-containing gas so it can be possible to enter into combustion reaction with the fuel portion which is contained in gases formed as a result of the above first incomplete combustion; at that, fuel jet opens inside the jet of primary oxygen-containing gas at some point located at some distance in backward direction from combustion chamber wall; at that, the above point is located at distance r from that wall, and oxygen-containing gas with high oxygen content is pre-heated at least to 300C. Ratio r/D has the value either lying within the range of 5 to 20, or lying within the range of 0.75 to 3, and ratio 1/d has the value equal at least to 2. Oxygen-containing gas with high oxygen content represents oxygen concentration which is at least 70% by volume. Fuel is subject to pre-heating up to temperature comprising at least 300C.

EFFECT: increasing fuel combustion efficiency.

15 cl, 1 dwg

FIELD: power engineering.

SUBSTANCE: burner for fuel combustion comprises fuel supply line. The fuel supply line consists of several fuel sections. Also each fuel section is connected to another section and is designed for supply of fuel flow. Further, the burner includes a fuel inlet section. This section has the first fuel inlet and the first fuel outlet located at a distance from the first fuel inlet. The fuel inlet section has the first through cross section area and is designed to supply fuel flowing into the first fuel inlet and coming out the first fuel outlet. The burner has an intermediate section of fuel with fuel inlet and outlet device, notably the fuel outlet device is located at a distance from the fuel inlet device. The intermediate fuel section is designed for supply of at least part of flow coming into the inlet fuel device and going out of the outlet fuel device and has the second through cross section area. The second through cross section area changes from the initial through cross section area in the fuel inlet device to different through cross section area in the fuel outlet device. The burner has the fuel outlet section. The fuel outlet section has the second inlet of fuel and the second outlet of fuel located at a distance form the second inlet of fuel. The fuel outlet section is designed for supply of at least part of fuel flow coming onto the second fuel inlet and going out the second fuel outlet and it has the third through cross section area. This third through cross section area in essence is uniform along the whole outlet section of fuel. The burner comprises the first line of oxidant with several oxidant sections. Each oxidant section is connected to another oxidant section. It is designed to supply flow of oxidant. It includes an oxidant pressure chamber letting though oxidant flow and having the fourth through cross section area. At least part of oxidant pressure chamber is located in essence at least next to a part of at least one inlet section of fuel, intermediate section of fuel and outlet section of fuel. The oxidant outlet section lets through at least part of oxidant flow and has the fifth through cross section area. Also the fifth through cross section area is less or equal to the fourth through cross section area and in essence is uniform along the whole outlet section of oxidant. At least part of oxidant outlet section in essence is positioned next to the fuel outlet section.

EFFECT: facilitating upgraded quality of fuel combustion and reduced level of nitrogen oxide exhaust into atmosphere.

28 cl, 19 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing acetylene and synthetic gas via thermal partial oxidation of hydrocarbons which are gaseous at temperatures used for preheating, in a reactor which is fitted with a burner with through holes, characterised by that the starting substances to be converted are quickly and completely mixed only directly in front of the flame reaction zone in through holes of the burner, where in the mixing zone within the through holes the average flow rate is higher than the propagation speed of the flame under the existing reaction conditions. The invention also relates to a device for realising the said method.

EFFECT: possibility of avoiding preliminary and reverse inflammations.

9 cl, 3 ex, 1 dwg

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