Gas burner

 

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. The gas burner comprises a combustion chamber formed in a straight cylindrical reservoir with a gas nozzles located along collector, two flat side and two inclined walls, and side walls are installed perpendicular to the longitudinal axis of the collector, and in the sloping walls of the holes, the sizes of which increase the output section of the combustion chamber. Sloping walls are made of variable cross-section from the line where it attaches to the gas manifold toshaped in the output section of the combustion chamber and the side walls have the shape of an isosceles trapezoid, the smaller base of which is situated towards the collector. 2 C.p. f-crystals, 4 Il.

The invention relates to a power system and can be used in stoves for burning gaseous fuel.

You know the burner gas stove, implements the method of heating Vozduh collector, and stabilizer in the form of inclined perforated plates, while the collector of the gas nozzles installed between the plates.

The disadvantage of this device is the output side of the fuel outside of the torch and increased the size of the torch.

Known gas burner [2], containing a cylindrical rectilinear fuel manifold with nozzles located along collector, and stabilizer. The latter is in the form of longitudinal inclined one relative to the other plates, the angle between them is 60 to 90o. The plate is provided with transverse rows of holes, the diameter of which increases as the distance from the collector, and vozduhonezavisimymi by flanging. The rows of holes are arranged with a pitch equal to the pitch between the nozzles and offset relative to the last half of this step.

The disadvantage of this device is the output side of the fuel outside of the torch.

Known technical solutions [3] and [4], in which more or less eliminated this disadvantage.

To do this, the first parallel inclined plates stabilizer installed hazerswoude tube with holes connected to the collector.

In the second solution into the cavity of the main manifold is made is ollector, when this annular gap communicates with the cavity of the box through tubes passing through the main header.

The disadvantage of these solutions is the complexity of the design. In addition, these technical solutions cannot completely exclude the output side of the fuel outside the torch because of the open end surfaces of the combustion chambers formed by the inclined perforated plates and gas reservoirs, especially in terms of organization between the plates of the fields increased turbulence, which, on the one hand, promote intensification of combustion, and on the other, the discharge side of the fuel through the mentioned end surface of the combustion chambers.

Closest to the claimed technical solution of the essential features is a gas burner [5].

Burner contains the intake duct and the combustion chamber, formed by a straight cylindrical reservoir with a gas nozzles located along collector, two flat side walls, which is a continuation of the end walls of the enclosure, and two inclined sides. In the sloping walls of the holes, the sizes of which increase the output section of the combustion chamber. In addition tog holes, has the same major collector length.

Burner allows to reduce by all modes of operation, the level of chemical underburning, to exclude the output of the fuel outside the combustion chamber, to extend the range of operation of the burner.

Disadvantages burners are temperature deformation of the walls of the combustion chamber, leading to warping, cracking and, ultimately, to destruction.

The technical result of the use of the invention is to improve the reliability and durability of the burner.

This technical result is achieved that the gas burner, mainly heater containing a combustion chamber, formed by a straight cylindrical reservoir with a gas nozzles located along collector, two flat side and two inclined walls, and side walls are installed perpendicular to the longitudinal axis of the collector, and in the sloping walls of the holes, the sizes of which increase the output section of the combustion chamber, according to the invention sloping walls made of variable cross-section from the line where it attaches to the gas manifold toshaped in the output section of the combustion chamber, and the side with the IU, sloping walls in the outlet section of the combustion chamber and rectangular holes inclined walls is equipped with vozduhonezavisimymi by flanging.

The burner can be equipped with rotary dampers installed at the outlet of the combustion chamber.

This form of execution of the walls allows you to transfer arise when working temperature deformation changes in the linear dimensions of the combustion chamber without the occurrence in the walls of internal stresses, which could lead to cracking and destruction of the walls of the combustion chamber. However, changing the shape of the cross section tapered walls from the attachment to the manifold to the outlet cross section of the combustion chamber enables specified process smoothly, tracking temperature of the flame in the cavity of the combustion chamber. In addition, the shape of the walls allows to form in the cavity of the combustion chamber field of high turbulence, which provides the intensity and completeness of fuel combustion.

Supply burner butterfly dampers, and tapered walls and rectangular holes in them - flanging, if necessary to ensure that the process of redistribution of the flow of air over the cross section of air supply ducts, as well as to ensure the gas burner, side view of Fig.2 is a view As in Fig.1 (without the rotary damper of Fig. 3 - view of B in Fig.1; Fig.4 - section b-b In Fig.3.

Gas burner contains the intake duct 1, in the Central part of which by means of brackets 2 has a combustion chamber formed with a straight cylindrical fuel manifold 3, the two inclined sides 4 and two side walls 5. Along the collector 3 are gas nozzle 6.

Wall 4 is made variable cross-section from the line where it attaches to the manifold 3 toshaped in the output section of the combustion chamber. Wall 4 provided with circular holes 7, the sizes of which increase as the distance from the manifold 3, and the rectangular holes 8 located closer to the output section of the combustion chamber.

Wall 4 in the output section of the combustion chamber and the holes 8 have vozduhonezavisimymi the flanging 9 and 10, respectively. To simplify the manufacture of each wall 4 is made of two parts fastened together by the fastening elements 11.

Wall 5, fastened to walls 4 have the shape of an isosceles trapezoid, the smaller base of which is situated towards the collector 3. The burner has also povorot.

The fuel gas is led to the reservoir 3 and is distributed through the nozzle 6 in the plane of symmetry between the walls 4 of the combustion chamber. The air supplied to the combustion chamber through the intake duct 1 from the back side of the walls of the through holes 7 and 8. The presence of the combustion chamber along with inclined walls 4 and side walls 5 forming the cross-section of the combustion chamber closed circuit, ensures that the fuel outside the torch. When this form of the inclined wall 4 during operation of the burner allows the translation resulting thermal strains in changes in linear dimensions of the combustion chamber, eliminating internal stresses that lead to cracking and destruction of the walls 4 and 5. The cross-sectional shape of the walls 4 of the attachment to the manifold to the outlet cross section of the combustion chamber is changed in such a way as to track the desired value of the change in the linear dimensions of the walls 4 and 5 depending on the temperature of the torch in this section of the combustion chamber. Increased by a specified form tapered walls 4 different gas and air jets in the cavity of the combustion chamber contributes to the intensification of mixing and complete combustion of the fuel. The presence tbnyu valve 12 allow for the need to redistribute the flow of air over the cross section of the duct 1 and to regulate its flow into the combustion chamber.

Thus, the use of the invention eliminates the output of the fuel outside of the torch and to provide simplicity of design, reliability and durability of the burner.

Sources of information 1. Patent of Russia 1513338, IPC F 24 H 3/02, 1989

2. USSR author's certificate 877233, IPC F 23 D 13/00, 1981

3. USSR author's certificate 1477982, IPC F 23 D 14/00, 1989

4. USSR author's certificate 1802270, IPC F 23 D 14/22, 1993

5. USSR author's certificate 1281824, IPC F 23 D 14/22, 1987 - prototype.

Claims

1. Gas burner, mainly heater containing a combustion chamber, formed by a straight cylindrical reservoir with a gas nozzles located along collector, two flat side and two inclined walls, and side walls are installed perpendicular to the longitudinal axis of the collector, and in the sloping walls of the holes, the sizes of which increase the output section of the combustion chamber, characterized in that the sloping walls made of variable cross-section from the line where it attaches to the gas manifold toshaped in the output section of the combustion chamber and the side walls have. 1, characterized in that the sloping walls in the outlet section of the combustion chamber and rectangular holes inclined walls is equipped with air-guide flanging.

3. Burner under item 1, characterized in that it is equipped with an adjustable dampers installed at the outlet of the combustion chamber.

 

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The invention relates to the design block injection burners for equipment of gas-fired furnaces hot water and steam boilers, which are used primarily in heating systems of residential, public and industrial buildings

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.

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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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