Method of fuel firing using oxygen-contaning gas, burner for independent injection and method of glass load heating and furnace heating

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

 

The present invention relates to a method staged combustion using oxygen-containing gas with a high content of oxygen and oxygen-containing gas with a low oxygen content, which can be used during phases in which is interrupted by oxygen, generated at the plant for the production of oxygen.

Ways combustion using oxygen-containing gases, in General, use oxygen, coming from installations for the continuous production of oxygen, such as cryogenic installation or BCP (vacuum swinging absorption). To prevent the risks of interrupting the supply of oxygen, coming from these facilities, provided, in General, a container of liquid oxygen, installed near the place where the burning. To reduce the operating costs of the vessel and in order to avoid storing too much oxygen, which can be classified as a place of burning, in which a high probability of occurrence of an accident, in General, be preferred reducing capacity of this reservoir is to store oxygen. However, this reduction in storage capacity does not always allow to burn for quite a long time during the interruption of gas supply. One solution to this problem is s could be the recharge zone of the combustion air, but, in General, burners using gas with a high content of oxygen than air, does not allow the use of a large air flow.

The present invention is to provide a method of combustion and a suitable burner, usually gas with a higher oxygen content than air, allowing you to work with air in case of interruption of continuous supply of oxygen.

Therefore, the invention relates to a method of combustion using oxygen-containing gas, which inject a stream of fuel and at least two jets of oxygen-containing gas with a high oxygen content, while the first stream of oxygen-containing gas with a high content of oxygen, called primary flow, the spray so that it was in contact with jet fuel and formed an incomplete first combustion, and output gases after the first burning still contain at least one part of the fuel and the second stream of oxygen-containing gas with a high content of oxygen injected at a distance of l1from jet fuel to provide combustion with the first part of the fuel present in the output gases after the first burning, while oxygen-containing gas with low oxygen injected at a distance of l2from jet fuel, p is IVA burning with the second part of the fuel, present in the output gases after the first burning, and l2>l1.

Preferably the oxygen-containing gas with a high content of oxygen has an oxygen concentration of more than 30% by volume.

Preferably the oxygen-containing gas with low oxygen content is the oxygen concentration to a maximum of 30% by volume.

Preferably the length l1is 5-20 see

Preferably the length l2more than 30 cm

Preferably the amount of oxygen injected jets of oxygen-containing gas with a high oxygen content is 10-50% of the total number of injected oxygen.

Preferably the cross-sectional area of the nozzle for injecting oxygen-containing gas with a low oxygen content in 4-100 times greater than the cross-sectional area of the nozzle for injection into the distance l2oxygen-containing gas with a high oxygen content.

Preferably the oxygen-containing gas with a low oxygen content is pre-heated before injection.

Preferably the oxygen-containing gas with a high content of oxygen is supplied, at least partially from the storage facility for liquid oxygen.

The invention also relates to a node separate burner injection, consisting of, at IU is e, two blocks and containing a nozzle for injecting combustible gas and at least four nozzles for injecting oxygen-containing gas,

the first block has a nozzle for injection of fuel and at least two nozzles for injecting oxygen-containing gas with a high oxygen content, and the first nozzle for injecting oxygen-containing gas with a high oxygen content is placed in such a way as to be in contact with nozzle for injection of fuel, and a second nozzle for injecting oxygen-containing gas with a high oxygen content is placed at a distance of l1from the nozzle for fuel injection,

the second block has at least a third nozzle for injecting oxygen-containing gas with a high oxygen content and a fourth nozzle for injecting oxygen-containing gas with a low oxygen content, and each of them are placed at a distance of l2from the nozzle for injection of fuel from the first block, with l2more l1and the fourth nozzle for injecting oxygen-containing gas with a low oxygen content has an area, 4-100 times the square of the third nozzle for injecting oxygen-containing gas with a high oxygen content.

Preferably, the first nozzle for injection kislorodsiz rasego gas placed in the center of the nozzle for injection of fuel.

The node preferably includes a third block having a fifth nozzle for injecting oxygen-containing gas with a low oxygen content, placed at a distance of l2from the nozzle for injection of fuel and having an area, 4-100 times the square of the third nozzle for injecting oxygen-containing gas with a high oxygen content.

The node preferably includes two of the first block, the second block and the third block.

The invention also relates to a method of heating load of glass or heating furnace made using the above method.

Finally, the invention relates to a method, when interrupted continuous production of oxygen.

Other characteristics and advantages of the invention will be apparent from the following description. By not limiting the amount of patent claims of example the invention is illustrated in the drawing which is a schematic view of a node of the burner according to the invention.

Therefore, the invention relates firstly to a method of combustion using oxygen-containing gas, which inject a stream of fuel and at least two jets of oxygen-containing gas with a high oxygen content, while the first stream of oxygen-containing gas with a high content of oxygen, called the th primary jet inject so that she was in contact with jet fuel and formed an incomplete first combustion, and output gases after the first burning still contain at least one part of the fuel and the second stream of oxygen-containing gas with a high content of oxygen injected at a distance of l1from jet fuel to provide combustion with the first part of the fuel present in the output gases after the first burning, while oxygen-containing gas with low oxygen injected at a distance of l2from jet fuel, providing the combustion with the second part of the fuel present in the output gases after the first burning, and l2>l1. The invention therefore provides a method of staged combustion in which the oxygen-containing gas required for the combustion of fuel is divided into parts in the form of at least three jets. One way of staged combustion is to divide the number of oxygen-containing gas required for complete combustion of the fuel, at least two additional flow of oxygen-containing gas introduced at various distances from the stream of fuel. Thus, the first additional flow of oxygen-containing gas is injected at a very short distance from the fuel flow. This thread is the closest to the stream that is Liwa, called primary flow, it provides the possibility of partial combustion with a controlled temperature, which limits the formation of nitric oxide. At least another auxiliary stream of oxygen-containing gas is injected at a greater distance from the fuel than the primary stream of oxygen-containing gas. This ensures complete combustion of fuel, which has not entered into reaction with the primary oxygen-containing gas. This thread is called the secondary flow. According to the present invention, the first, primary, jet spray so that she was in contact with jet fuel. This means that the distance between the jet of fuel and primary oxidant stream is zero (not to mention the possible presence of tubular wall separating the two streams), this primary stream is a stream of oxygen-containing gas with a high oxygen content. According to the invention the oxygen-containing gas with a high content of oxygen has an oxygen concentration greater than 30% by volume, preferably at least 90% by volume. In General, the oxygen-containing gas with a high oxygen content comes partly from installations for the storage of liquid oxygen. Liquid oxygen may be diluted with air so that the injected oxygen-containing gas has a concentration CI is the oxygen of more than 30% by volume, preferably, at least 90% by volume. The second and third jet of oxidizer injected at some distance from the jet of fuel and primary jets, they provide the ability to supply oxidant in an amount necessary for complete combustion, initiated by the primary jet. According to the invention the oxygen-containing second gas stream has a high oxygen content, and this second jet spray at a distance of l1. Distance

l1preferably is in the range of 5-20 see According to the invention, the third stream has a low content of oxygen and inject at a distance of l2much greater than l1, and refers to the oxygen-containing gas with low oxygen content. The term "low oxygen" means oxygen-containing gas having an oxygen concentration up to 30% by volume. They preferably is air. Length l2preferably more than 30 cm

In General, the total amount of oxygen injected all the jets of oxygen-containing gas is approximately stoichiometric, in other words, lies within the interval+15% relative to the stoichiometric amount required for complete combustion of the injected fuel. The amount of oxygen injected jets of oxygen-containing gas with high is their oxygen content, preferably 10-50%, or preferably 25-50% of the total amount of injected oxygen.

According to this particular variant of the invention the oxygen-containing gas with a low oxygen content can be preheated before injection.

The invention also relates to a node separate burner injection, consisting of at least two blocks and containing a nozzle for injecting combustible gas and at least four nozzles for injecting oxygen-containing gas,

the first block has a nozzle for injection of fuel and at least two nozzles for injecting oxygen-containing gas with a high oxygen content, and the first nozzle for injecting oxygen-containing gas with a high oxygen content is placed in such a way as to be in contact with nozzle for injection of fuel, and a second nozzle for injecting oxygen-containing gas with a high oxygen content is placed at a distance of l1from the nozzle for fuel injection,

the second block has at least a third nozzle for injecting oxygen-containing gas with a high oxygen content and a fourth nozzle for injecting oxygen-containing gas with a low oxygen content, and each of them are placed at a distance of l from the nozzle for injection of fuel from the first block, with l2more l1and the fourth nozzle for injecting oxygen-containing gas with a low oxygen content has an area, 4-100 times the square of the third nozzle for injecting oxygen-containing gas with a high oxygen content. The term "unit" means a building block of refractory material is introduced into the furnace wall. The term "nozzle" means a pipe for supplying a jet of gas. In the process staged combustion with this site burner and a source of oxygen for an unlimited amount of the first nozzle enables injection of the primary oxygen-containing gas with a high oxygen content, second and third nozzles allow injection of oxygen-containing gases with high oxygen content, and no gas is not injected into the fourth nozzle. This method corresponds to the method of staged combustion using oxygen-containing gas with a high oxygen content, with the primary jet and two secondary jets. During the interruption in the continuous production of oxygen this site burner provides the possibility of implementing the method according to the invention, as described above, the first and second nozzles allow injection of jets of oxygen is about gas with a high oxygen content, no gas is not injected into the third nozzle, and oxygen-containing gas with low content of oxygen injected into the fourth nozzle.

Site burner is designed so that the distance l1is preferably 5-20 see moreover, the distance l2preferably more than 30 see the First nozzle for injecting oxygen-containing gas is preferably placed in the center of the nozzle for injection of fuel.

According to one particular variant of the invention, the host of the burner may include a third block having a fifth nozzle for injecting oxygen-containing gas, placed at a distance of l2from the nozzle for injection of fuel and having an area, 4-100 times greater than the area of the third nozzle for injection.

According to this variant of the invention, the node contains two nozzle large area, each of which is installed at a distance of l2from fuel injection. According to this latter version of the invention, the node preferably includes two of the first block, the second block and the third block. In the latter case, the corresponding distances l1and l2to each nozzle in the first pair of the first and second blocks will preferably be the same as the corresponding distances l1and l2to each burner of the same type in the second pair of first and second b the shackles. The same applies to areas of the nozzles of the first pair of the first and second blocks, and squares nozzles of the same type of the second pair of first and second blocks. Thus, for example, the second and the third nozzle for injecting oxygen-containing gas two second blocks have the same length l1and l2and area values. According to a preferred variant of this method the total fifth nozzle has an area greater than the area of fourth nozzles.

Finally, the invention relates to a method, described above, to heat load of glass or heating furnace.

The invention also relates to a method of combustion described above, when interrupting the continuous production of oxygen.

The drawing shows a circuit implementing the method according to the invention using the host burner containing five blocks.

Blocks 1, 2, 14, 15, 16 are combined in a furnace wall 17 and shown in the front view. Each of the blocks 1 and 2 contains

the nozzle 3, 4 for fuel injection,

the first nozzle 5, 6 for injecting oxygen-containing gas with a high oxygen content, placed in the center of the respective nozzles 3 and 4

the second nozzle 7, 8 for injecting oxygen-containing gas with a high oxygen content, placed respectively at a distance of l1from the nozzle 3 and at a distance of l1from the nozzle 4.

- the third nozzle 9, 10 for injecting oxygen-containing gas with a high oxygen content, placed respectively at a distance of l2from the nozzle 3 and at a distance of l2from the nozzle 4, respectively.

fourth nozzle 11, 12 for injecting oxygen-containing gas with a low oxygen content, placed respectively at a distance of l2from the nozzle 3 and at a distance of l2from the nozzle 4, respectively. The fourth square of the nozzle 11, 12 4-100 times greater than the area corresponding to the third nozzle 9, 10.

The block 16 is placed between blocks 1 and 2 and contains the fifth nozzle 13 for injecting oxygen-containing gas with a low oxygen content, placed respectively at a distance of l2from the nozzle 3 and at a distance of l2from the nozzle 4, respectively. The fifth area of the nozzle 13 in 4-100 times the area of the third nozzle 9 or 10.

In the process staged combustion with this site burner and a source of oxygen, the fuel is injected through nozzles 5 and 6 and the oxygen-containing gas with a high content of oxygen injected by the nozzles 5, 6, 7, 8, 9 and 10. Gas is not injected through the nozzles 11, 12 and 13. This method corresponds to the method of staged combustion using oxygen-containing gas with a high oxygen content, the primary jet and two secondary jets. When the interrupt output is VA oxygen, and when using oxygen in a limited number of this node burner provides the possibility of implementing the method according to the invention, above: fuel is always injected through the nozzle 3 and 4, and the oxygen-containing gas with a high oxygen content always is injected through the nozzles 5, 6, 7 and 8. On the contrary, the oxygen-containing gas is not injected by the nozzles 9 and 10, and the oxygen-containing gas with low oxygen content is injected by the nozzles 11, 12 and 13.

By the way it is possible for the burner to work correctly with gas with a higher oxygen content than the air supplied to the air in case of interruption of the oxygen supply.

Moreover, in case of interruption of oxygen supply and depletion of stored oxygen allows the use of a burner according to the invention only with air, instead of all oxygen-containing gases. The combustion process also remains effective.

1. A method of burning fuel using oxygen-containing gas, which inject a stream of fuel and at least two jets of oxygen-containing gas with a high oxygen content, while the first stream of oxygen-containing gas with a high content of oxygen, called primary flow, the spray so that it was in contact with jet fuel and formed an incomplete first combustion, and output gases after the first burning still contain at least one part of the fuel, but is that a stream of oxygen-containing gas with a high content of oxygen injected at a distance of l 1from jet fuel to provide combustion with the first part of the fuel present in the output gases after the first burning, characterized in that the oxygen-containing gas with low oxygen injected at a distance of l2from jet fuel, providing the combustion with the second part of the fuel present in the output gases after the first burning, and l2>l1.

2. The method according to claim 1, characterized in that the oxygen-containing gas with a high content of oxygen has an oxygen concentration of more than 30% by volume.

3. The method according to claim 1 or 2, characterized in that the oxygen-containing gas with low oxygen content is the oxygen concentration to a maximum of 30% by volume.

4. The method according to claim 1, characterized in that the distance l1is 5-20 see

5. The method according to claim 1, characterized in that the distance l2more than 30 cm

6. The method according to claim 1, characterized in that the amount of oxygen injected jets of oxygen-containing gas with a high oxygen content is 10-50% of the total number of injected oxygen.

7. The method according to claim 1, characterized in that the cross-sectional area of the nozzle for injecting oxygen-containing gas with a low oxygen content in 4-100 times greater than the cross-sectional area of the nozzle for injection into the distance l2oxygen is containing gas with a high oxygen content.

8. The method according to claim 1, characterized in that the oxygen-containing gas with a low oxygen content is pre-heated before injection.

9. The method according to claim 1, characterized in that the oxygen-containing gas with a high content of oxygen is supplied, at least partially from the storage facility for liquid oxygen.

10. Site burner for a single injection, consisting of at least two blocks(1, 2, 14, 15, 16) and containing a nozzle (3, 4) for injecting combustible gas and at least four nozzles(5, 6, 7, 8, 9, 10, 11, 12, 13) for injecting oxygen-containing gas,
the first block (1, 2) has a nozzle (3, 4) for fuel injection and at least two nozzles (5, 6, 7, 8) for injecting oxygen-containing gas with a high oxygen content, and the first nozzle (5, 6) for injecting oxygen-containing gas with a high oxygen content is placed in such a way as to be in contact with the nozzle (3, 4) for fuel injection, and the second nozzle (7, 8) for injecting oxygen-containing gas with a high oxygen content is placed at a distance l1from the nozzle (3, 4) for fuel injection,
the second unit (14, 15) has at least a third nozzle (9, 10) for injecting oxygen-containing gas with a high oxygen content and a fourth nozzle (11, 12) for injection kislorodnije the containing gas with a low oxygen content, each of them placed at a distance of l2from the nozzle (3, 4) for the fuel injection of the first block, with l2more l1and the fourth nozzle (11, 12) for injecting oxygen-containing gas with a low oxygen content has an area, 4-100 times square third nozzles (9, 10) for injecting oxygen-containing gas with a high oxygen content.

11. Site burner of claim 10, wherein the first nozzle (5, 6) for injecting oxygen-containing gas is placed in the center of the nozzle (3, 4) for fuel injection.

12. Site burner of claim 10 or 11, characterized in that it contains the third block (16), having a fifth nozzle (13) for injecting oxygen-containing gas with a low oxygen content, placed at a distance of l2from the nozzle (3, 4) for fuel injection and with square, 4-100 times square third nozzles (9, 10) for injecting oxygen-containing gas with a high oxygen content.

13. Site burner 12, characterized in that it contains two of the first block (1, 2), two second unit (14, 15) and one third block (16).

14. Method heat load of glass or heating furnace comprising a combustion using oxygen-containing gas, which inject a stream of fuel and at least two jets of oxygen-containing gas with high staranimolinar, the first stream of oxygen-containing gas with a high content of oxygen, called primary flow, the spray so that it was in contact with jet fuel and formed an incomplete first combustion, and output gases after the first burning still contain at least one part of the fuel and the second stream of oxygen-containing gas with a high content of oxygen injected at a distance of l1from jet fuel to provide combustion with the first part of the fuel present in the output gases after the first burning, characterized in that the oxygen-containing gas with low oxygen injected at a distance of l2from jet fuel, providing the combustion with the second part of the fuel present in the output gases after the first burning, and l2>l1.



 

Same patents:

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: 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

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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