Gas burner with supersonic jet

 

(57) Abstract:

Usage: autogenous technique. The inventive gas burner with a supersonic jet nozzle includes a head 1 with the manifold 2 connected to the nozzle of the fuel gas in the form of an annular slit 3, line 4 for supplying gas and a throttling hole 5, the mixing cavity 6, saarialho ring 7, with oblique grooves 8 for the passage of air from the cooling path 9 formed by the housing 10 and the shell of the combustion chamber 11, the nozzle cap 12 and a collector 13 is connected to the line supplying air 14 through the throttling orifice 15, the nozzle 16, the housing 10. Tract 9 through holes 17 is connected with the gap 18. In the center of the head 1 is made a hole with narrowing to protect the spark plug 20. The head provides a volumetric combustion of the combustible mixture without disrupting the flame, which improves the flow of gas and air in the combustion chamber to increase the pressure therein and to obtain a supersonic jet of combustion products. 7 C.p. f-crystals, 8 ill.

The invention relates to acetylene technique that uses the impact of a supersonic gas jet with a temperature of up to 1300oOn a hard surface. Primary use of the burner can stroitelstve for fracture of asphalt, concrete, brick and granite with maintenance and construction work in the chemical industry, for example for cleaning of autoclaves from the precipitate, and the ship repair industry for cleaning underwater parts of ships from organic deposits and utilities for cleaning roads and sidewalks of ice and snow.

Known chamber swirl burner that runs on compressed air and fuel gas (1). The burner has a reservoir for gas and air, the mixing head, consisting of a swirl to air and Central openings for gas, two serial connected to the combustion chamber, the last ends with a nozzle confused type. The combustion gas in the air occurs in the combustion chamber, ignition of the combustible mixture is produced from its exit from the nozzle. When this flame should "slip" into the combustion chamber. Cooling of the combustion chamber is inside the vortex veil swirled in the swirl of air. These torches have been used for heating the metal when it is heat treated. The speed of the combustion products stream is 250 to 350 m/sec. Pressure of propane and air entering the burner is 0.05-0.2 MPa. The main disadvantage of this burner subsonic flow rate of the product is atrustee hardwoods and cleaning of surfaces from unwanted fat. In addition, when approaching this burner nozzle to the workpiece surface and change the pressure in the combustion chamber and the costs of air and gas through a nozzle that leads to the extinction of the flame in the combustion chamber. This complicates the operation and creates inconvenience in cleaning surfaces and fracture of rocks.

There are high-speed burners without pre-mixing with water or air cooling of the combustion chamber (2), consisting of a mixer and combustion confused nozzle for exit of combustion products. The mixer consists of an annular manifold gas with holes opening into the combustion chamber. In the center of the mixer is fed air through a pipe, the mixing of gas with air in the combustion chamber. A cooling path formed by the inner shell chamber, the casing and the outer casing and provided with a reservoir for supplying and discharging cooling air or water. Ignition is carried out from the nozzle, the flame front skips confused through the nozzle into the combustion chamber. In the case of using oxygen-enriched air cooling is carried out with water and the nozzle exit is possible to obtain a jet of gas with a velocity of 900 m/s and with a higher temperature the political process. The main disadvantage of this burner, as well as for chamber vortex is subsonic speed after the products of combustion, due to the use of confused nozzle and low pressure in the combustion chamber (up to 0.2 MPa), which reduces the efficiency of cleaning surfaces and fracture of rocks, leads to attenuation of the flame in the combustion chamber at the location of the nozzle close to the work surface, which degrades its performance properties. In addition, poor mixing of gas with air in the burner leads to incomplete combustion of gas. Resulting output produces toxic substances, for example, carbon monoxide and unburned gas that pollutes the atmosphere in the shop and unacceptable from the point of view of labor.

The closest technical solution (prototype) is a gas burner with a supersonic jet (3). This burner includes a head with an annular manifold fuel gas communicating throttling hole with the line supplying fuel gas and burner fuel gas, an air manifold which is connected to the main supply of air, a combustion chamber with a swirl in the cylindrical housing, which is fastened at one end with a head, and nozzle cap, Kotor is with header combustible gas, on the other hand is communicated with the cavity of the mixing combustible gas and air is formed by the end surface of the head and the surface of the swirler.

The problem to which this invention is directed, is the creation of a gas burner with a supersonic jet with a higher efficiency.

Technical result achieved is to simplify the design of the burner, the resources and reliability, improving environmental cleanliness during operation of the burner, reducing the cost of the work.

This technical result is achieved that the gas burner with supersonic jet containing the crown with o-ring manifold fuel gas communicating throttling hole with the line supplying fuel gas and burner fuel gas, an air manifold which is connected to the main supply of air, a combustion chamber with a swirl in the cylindrical housing, sealed at one end with a head, and nozzle cap mounted on the other end of the cylindrical body, and the nozzle of the fuel gas on one side communicated with the fuel gas manifold, and the other with the cavity of the mixture is made with a through hole, in which you installed the spark plug, injector fuel gas is made in the form of an annular slit, swirl made in the form of a ring with diagonal grooves, evenly spaced on a circle on its side surface, is fixed in the radial axial directions in the cylindrical housing, an air manifold designed in to allow the cover and communicated with the main line inlet air throttling bore, a combustion chamber provided with a membrane between the outer surface and the inner surface of the cylindrical housing formed by the cooling section, in which is placed spacers, communicating with one hand helical grooves swirl with a cavity mixing combustible gas and air, but on the other hand with an air reservoir, and the shell of the combustion chamber with one end rigidly attached to allow the lid, the other end of the swirl with the possibility of axial movement relative to it.

In addition, the shell of the combustion chamber is installed on the swirl with a gap between the cylindrical surface of the ring and the inner surface of the shell, the shell or ring made a number of evenly spaced around the circumference of the channels for the passage of air from ohliday to the longitudinal axis of the swirl, and from the oblique grooves to zone output ring slits are narrowed.

Through the hole in the head from the combustion chamber is made with a diameter of 5-6 mm

Jet cover gas burner is made in the form of a cone, and coplowe hole is located on the side surface of the latter. The maximum area of the throttling holes for the fuel gas and air are chosen from a condition ensuring minimum pressure difference at the inlet throttling orifices and pressure in the combustion chamber not less than 0.08 MPa and 0.1 MPa, respectively.

Head, swirl and the shell is fixed coaxially relative to each other.

Axis throttling of the air hole and the axis of the nozzle is made to intersect. The proposed design of the gas burner that provides due to the mixing of a film of gas flowing from the annular slit in the head, swirling film of air coming from the oblique grooves in the cavity of the mixing, provides a higher quality of the combustible mixture entering the combustion chamber. Due to this combustion takes place within the volume of the combustible mixture with a very high speed, unlike the case of diffusion combustion. High speed combustion unit, to increase the pressure in the combustion chamber and to receive output from a nozzle of a supersonic jet of combustion products. Pressure increases the rate of combustion increases.

To improve the quality of mixing gas with air in the burner design includes the following activities. First, the cavity of the mixing gas with air in the outlet area of the annular gap head (nozzle fuel gas) is narrowing and made extending toward the longitudinal axis saarialho rings, and from the oblique grooves to zone output ring sector taper. When the air outlet of the oblique grooves speed increases due to the narrowing cavity mixing, reaches its maximum in the outlet area of the annular slit, and then decreases in an expanding part of the cavity. The release film of gas from the annular gap occurs in a thin film of air, having a maximum speed in the cavity of the mixing, it facilitates the capture of particles in the gas of the air and their mixture. After this occurs, the deceleration of the flow in the expanding part of the cavity mixing, accompanied by intense vorticity. Resulting in complete mixing of the gas with the air and fuel mixture enters the jectio gas air, thereby increasing the reliability of the launch and sustainability of the combustion process. The fact that at the time of ignition of the combustible mixture, the pressure in the combustion chamber increases, which leads to a sharp reduction in air flow is reduced and its speed, which causes an additional reduction in gas consumption due to the ejection of the air. This reduction of the costs of gas and air, due to the ejection of gas, will not cause a significant deviation from the stoichiometric ratio and the combustion process is not terminated, the burner is operating steadily, which increases its reliability and ease of use. Secondly, the completeness of mixing gas with air depends on the length of the path of confusion. To increase the path of the mixing nozzle air made in the form of oblique grooves, the comfort of which the air becomes tangential component of velocity, the path traversed by the air and engage them in the movement of gas in the cavity of the mixing increases, which results in a better mixing of the gas with air and increase the efficiency of combustion. The result is improved environmental friendliness of products of combustion. Thirdly, the quality of the combustible mixture also depends on osesimmetrichnoi gas-dynamic velocity field of the gas and ameena, but differ in the composition of the combustible mixture at the end of the mixing cavity (hole diameter saarialho ring). This affects the completeness of fuel combustion. To obtain the axisymmetric pattern of the flow in the design of the burner is provided by the following. Swirl is made in the form of a ring, on the side surfaces of which are evenly spaced around the circumference are oblique grooves.

Saarialho ring fixed in the radial and axial directions in the cylindrical housing, for example, the head, the swirl and the shell is fixed coaxially relative to each other, the head tight to Saariselka ring on the ring flange, performed on the end surface of the head or saarialho the rings, while the shell of the combustion chamber based on concentric cylindrical ledges saarialho ring and to allow the cover, which is fastened to the body. It is structurally ensures uniformity of air flow through the district section saarialho ring, i.e., at the entrance to the mixing cavity. Moreover, a circular slot in the cylinder is coaxially Saariselka ring, and a uniform gap cooling path between the housing and the shell of the combustion chamber provides Ravenstvo gas velocity at the inlet into the annular gap at any point and the uniformity of the velocity field at the inlet into the cooling path. In addition, the mixing cavity is axisymmetric, that is tight head to Saariselka ring on the ring collar. The result is axisymmetric gas-dynamic pattern of the flow of gas and air, their mixing and composition of the mixture, therefore, the combustion process, which promotes complete combustion of the combustible mixture and improves the ecological purity of the combustion products.

During burner operation at subsonic modes, the cooling becomes ineffective and the temperature of the shell of the camera increases. To avoid changing the shape of the shell chamber when the burner operates at off-design modes, on the outer surface of the shell of the combustion chamber evenly placed spacers, providing a guaranteed gap cooling path during burner operation at off-design modes. For simplicity, the spacers can be made of wire.

When working using a burner in the shops of the air is used from the Guild system of compressed air, the pressure in which is usually not more than 0.6 MPa. On the other hand, it is necessary to have as much as possible the pressure in the combustion chamber to enhance the power of the jet of the burner, i.e., it make the air and combustible gas. The selection is performed by the minimum pressure drop them, ensuring the stability of the combustion process in the combustion chamber of the burner. Throttling holes can reduce the impact of sudden changes in pressure in the combustion chamber to the change in the flow rate of gas and air in the respective reservoirs, and consequently the combustion chamber. This helps to ensure reliable starting of the burner and its sustainable operation. The minimum pressure drop is found experimentally and is 0.08 MPa 0.1 MPa for gas and air, respectively.

When the combustion gas-air mixture is heated parts of the burner and it can cause them to melt and burnout of the combustion chamber. To reduce the temperature of the parts of the burner is provided by the cooling. The cylinder is cooled by the fuel gas entering the collector, and the shell of the combustion chamber is cooled by air passing through the cooling path from the air manifold to the oblique grooves saarialho rings. The combustion zone starts from the output cavity of the mixing and apply for saarialho ring, here the highest temperature. For additional cooling in this zone, skirts saarialho ring and the shell of the combustion chamber is trom between the cylindrical surface of the ring and the inner surface of the shell of the combustion chamber, on the shell or on the ring made a number of evenly spaced around the circumference of the channels for the passage of air from the cooling path in the gap. The uniformity of the velocity field in the jet contributes evenly distributed around the circumference of the channels for the passage of air. In the cooled part of the shell of the combustion chamber in contact with the combustion zone.

Jet cover from the side of the combustion chamber is cooled by air coming through the throttling hole in the manifold. To exclude the ingress of air into the combustion chamber through the articulation of the shell of the combustion chamber and to allow the first cover is based on the second without a clearance. The most tallapragada part of the burner is a critical section of the nozzle. For cooling of the nozzle in the design of the burner is provided by the following. Axis throttling of the air hole and the axis of the nozzle is made to intersect. A jet of air from the throttling holes washes the outer surface of the nozzle cools it braked in the manifold and enters the cooling path. This prevents overheating, fusion and erosion of parts of the combustion chamber and to increase the service life of the burner and its reliability. The shell of the combustion chamber is greater for those who supply, in the burner design movable in the axial direction of the bearing shell of the combustion chamber on saarialho ring. This prevents deformation of the parts of the burner and the depressurization of the compounds of the casing head and to allow the cover that improves safety, reliability and service life of the burner.

The resource of the burner has an impact and erosion of the electrodes of the spark plugs screwed into the through hole on the head. To reduce erosion of the electrodes of the spark candles and improve the reliability of multiple burner from starting the design provided by the narrowing of the through-hole in the head from the combustion chamber. The minimum diameter of the hole in the head from the combustion chamber is chosen experimentally and is 5-6 mm Smaller hole hinders the access of the combustible mixture to the spark plug, making it difficult to run, and a larger aperture increases thermal effects on the electrodes, which leads to their erosion. Therefore, the experimental selection of the minimum diameter of the hole was made from the condition of a reliable ignition of the combustible mixture in the combustion chamber. In the absence of narrow holes in the cylinder, there is erosion electrolicious whirlwind burning the mixture, that increases the supply of heat to the head and it heats up (on some samples to dark cherry color), which increases the risk of working with a torch.

For some works, e.g., when cleaning the inner surface of the castings from scale in hard to reach places air-gas burner has a nozzle cover in the form of a cone, and coplowe the hole is located on the lateral surface. This makes it more convenient handling holes, pockets and other crowded places castings, which facilitates cleaning. Burner with such arrangement of the nozzles can be processed and outer surfaces, which, ultimately, reduces the cost of the work.

The above-described constructive solutions allow you to improve the interaction of the gas jet gas burner with a hard surface when cleaning or destruction. Moreover, when cleaning the castings from scale and molding the mixture or when cleaning any other metal surfaces from deposits, the metal surfaces being cleaned are not fused, but due to the supersonic speed of the jet improves its interaction with the crumbling scale or deposits. The destruction of the processed material is in about the invention is illustrated by drawings:

in Fig.1 shows a General view of the gas burner with a supersonic jet with a Central location of the nozzle; Fig.2 the first embodiment of the oblique grooves saarialho ring; Fig.3 1 - vtoroy embodiment of the oblique grooves saarialho ring; Fig.4 is a view along arrow a of Fig.3 oblique grooves on the second version saarialho ring; Fig.5 type I (Fig.1) perform a channel for the passage of air from the cooling path in the gap in the first embodiment, and Fig.6 type I (Fig. 1) perform a channel for passage of a cooling path in the gap on the second version of Fig.7 the design of the burner with an integral head and tapered to allow the cover; Fig.8 diagram of the remote control burner.

General view of the gas burner with the supersonic jet and the Central location of the nozzle shown in Fig.1. The burner consists of a head 1, inside it is a reservoir 2 having communication with the nozzle of the fuel gas in the form of an annular slit 3. The gas in the reservoir is fed through line 4 for supplying gas and a throttling hole 5. The output of the annular gap 3 is combined with a narrowing of the mixing cavity 6 formed by the end surface of the head 1 and the surface saarialho ring 7. On the outer obrazuyutsa inner surface of the housing 10 and the outer surface of the combustion chamber 11. To the housing 10 with one end hermetically attached to the cylinder 1, and the other jet cover 12. Jet cover 12 has a collector 13, which is connected to the line supplying air 14 through the throttling orifice 15. The nozzle 16 is made in the centre to allow the cover 12. On the concentric surface to allow the cover 12 lean body 10 and no gap in the shell of the combustion chamber 11. The other end of the shell of the combustion chamber 11 rests movably in the axial direction on Saariselka ring 7. Oblique grooves 8 on Saariselka ring 7 can be performed in two ways. In Fig. 2 shows the first embodiment of the oblique grooves 8, and Fig.3 and Fig.4 shows a second embodiment of the oblique grooves 8 on Saariselka ring 7. As the test showed, both options provide the output of the oblique grooves of the swirling flow, the velocity vector of which is shown in Fig.2 and 3. This allows to obtain good mixing of the gas with air to provide complete combustion of gas.

The cooling path 9 (Fig.1) is connected evenly spaced around the circumference of the channels 17 with a gap 18. The channels 17 are made in the form of a series of holes in the shell of the combustion chamber, evenly spaced around the circumference. The number of holes 17 on the implemented Gorelkin shell of the combustion chamber 11, for example, by milling. In Fig.6 shows a second variant of the channels 17, performed on a ledge saarialho ring 7, for example, milling, slotting, or knurling. The most technologically advanced option of the channels shown in Fig.1 and 7.

In the center of the head 1 has a through hole with narrowing of 19 to protect the spark plug 20 from erosion (see Fig.1). On the outer surface of the shell of the combustion chamber 11 (see Fig.1) attached wire spacers 21, evenly spaced around the circumference (6-8 pieces). The axis of the hole 15 is directed to the outer surface of the critical section of the nozzle 16. The constancy of the gap of the cooling path 9 provided with a centering block 10 and the shell of the combustion chamber 11 in concentric surfaces to allow the cover 12, and the other end of the body 10 and the shell of the combustion chamber 11 setentrional relative to each other in concentric surfaces saarialho ring 7. The cylinder 1 and saarialho ring 7 is tightly pressed to each other by an annular rib on the outer part of the oblique grooves 8 saarialho rings 7 and both setentrional in the groove of the housing 10. This provides osesimmetrichnoi channels for the passage of air and gas in the burner.

Design realizova consists of a housing 22, the inner cone 23 and allow the sleeve 24, is welded to the conical housing 22 and the inner cone 23. Axis throttling of the air hole 15 is directed to the surface to allow the sleeve 24. The conical housing 22 and the inner cone 23 form a reservoir 13 for air. Assembly and welding tapered to allow the cover 12 is carried out in a special device, ensuring concentricity of mounting surfaces of the shell of the combustion chamber 11 and the housing 10, which provides a constant gap cooling path 9. The head consists of a casing head 1, the liner 25 and the ring 26. The liner 25 setentrional in axial and radial direction in the housing head 1 and welded to it. This provides a constant gap cylindrical slit in the head. In the insert is drilled throttling hole 5 for gas. It connects the line 4 for supplying gas to the collector 2. At the end of the liner 25 is made boring. It is inserted ring 26 with the bore diameter 5,50,5 mm and is welded at four points. The welding should be flush with the frontal surface of the head. The ring 26 serves to protect the spark plug 20 from the effects of high temperature combustion products, which reduces soil erosion. Saarialho ring 7 and GW this position the housing 10 and the cylinder 1 are welded to each other. This provides osesimmetrichnoi channels in the burner for the passage of air and gas. The burner control is carried out using the remote control, the scheme of which is shown in Fig. 8. The burner 27 is connected to the compressed air by means of a valve-throttle 28. The pressure of the compressed air inlet to the burner 27 is controlled by a pressure gauge 29. To the gas main burner is connected by means of valve-throttle 30, to control the gas pressure at the inlet of the burner is equipped with a pressure gauge 31. Ignition is supplied from the high voltage unit 32 included in the network by means of a switch 33.

Operation of the burner. When starting the burner, air is injected into the burner, valve-choke 28 (see Fig.8) is opened and the pressure gauge 29 is controlled by a predetermined pressure of the inlet air throttling hole 15 (see Fig. 1). After that, turn the toggle switch 33 (see Fig.8) and the block of the high voltage produces periodic pulses of voltage of about 40 kV. Between the electrodes 20 occurs periodic spark discharge. Opens a valve-choke 30 and a pressure gauge 31 is controlled by the set pressure of the propane-butane inlet throttling hole 5 (see Fig.1). Is the ignition of the combustible mixture in the burner 27 (semisolid working burner. In the process, a given ratio of air and propane-butane is monitored using pressure gauges 29 and 31 (see Fig.8) and, if necessary, adjustments are made using the valve-choke 28 and 30. Off of the burner is effected by closing the valve-throttle 30. After the termination of the combustion residue gas at the burner is closed and valve-throttle 28 and the air supply to the burner 27 is terminated. This procedure of starting and stopping the burner minimizes the mass of the unburned gas through the nozzle into the environment, which increases fire safety burner and improve the ecological purity of the air in the shop. In moments of starting, running and stopping of the burner in it, the following happens. Air flows through the tube 14 (see Fig. 1) and a throttling hole 15 in the air manifold 13 in the form of streams, washes the nozzle 16 with the outer surface, cools it, braked in the collector 13 and enters the cooling path 9, moving over him, cooling the shell of the combustion chamber 11. Near saarialho ring 7 part of the air passes through a series of holes 17, which are evenly spaced around the circumference of the shell of the combustion chamber 11, and then moves through the gap 18 in the opposite direction, creating at the exit of the gap 18 of the wall structure of the air passes through the oblique grooves 8 saarialho ring 7, twisted and fed to the inlet of the mixing cavity 6. In the latter the air is accelerated by passing through the narrowing portion of the mixing cavity 6, is the narrowing of the cavity of the mixing, which is a film of gas from the annular gap 3. The gas enters through the tube 4 and a throttling hole 5 into the reservoir 2, which comes in the annular gap 3, emerges from it, is caught by the air and mixed with them. Then the mixture of gas with air is drawn into the expanding portion of the mixing cavity 6, which is inhibited with an intense vorticity and fully completes the mixing of gas with air. Next, the mixture flows into the combustion chamber and through the opening 19 to the electrodes. Is the ignition of the combustible mixture by the spark between the spark plug electrodes, and starts the stable combustion in the combustion chamber. The combustion products expire through the nozzle 16, which are accelerated to supersonic speed that can be stated in the "chain" shock waves on the jet. When the pressure of the air and gas inlet to the burner decreases the speed of the jet of combustion products and may come subsonic mode of expiration, in which the burner operates steadily.

In Fig. 7 shows the structure of a pressure air inlet of 0.65 MPa, the pressure of the propane-butane at the entrance of 0.43 MPa, the total flow of air and propane-butane 10 g/s, the calculated ratio of the components of fuel 1:15, the operating range of the ratio of components of fuel 1: 12 1:20, the power stream of combustion products at the exit of the nozzle 11 kW, the flow rate of combustion products 1500 m/s, the jet stagnation temperature of 1000-1300oC. Disassembly of the burner after 60 hours showed that on the inner surface saarialho ring, the shell of the combustion chamber, to allow the cover and the nozzle holes of the signs of erosion and melting is not detected. The burner is made of stainless steel 12X18H10T, which gives it aesthetic appearance and reduces the requirements for storage and operation in hostile environments, and increases service life.

Supersonic gas jet directed on the treated hard surface, melts or restrictive it, depending on the material in a thin layer. Debris washed supersonic jet with very high speed, exposing the intact surface. So is removing the dross and residues sand from castings, cleaning the surface of sediments, destruction of solid rock. Base metal surface does not destroy the e allows you to heat it above the melting temperature. Burners with low speed jets are not allow to obtain a technical result. Only happens cracking or melting of the surface layer, and the removal of rock particles from the zone of destruction is difficult. Therefore burners with low speed jet of gas, ceteris paribus, have lower performance in the destruction of the rocks, the descaling. From the point of view of class activities offered by the burner, its effectiveness can be evaluated by power jets, determined by the kinetic energy of the jet gases from the known formula:

< / BR>
where the mass flow of the gas mixture through the burner, kg/s;

V the flow rate of combustion products through the nozzle, m/s

It is obvious that the ratio of the power of the proposed gas burner to power the existing analogue gas burner with an equal mass flows of gas-air mixture through the burner and gives a criterion for the effectiveness of the proposed burner compared to existing. It is defined by the following formula:

< / BR>
where VnVAthe flow rate of combustion products from the nozzle of the proposed burner and similar, respectively. The comparison will hold the burner shown in Fig. 7, and analogues:B>A=100.900 m/s). The result will be that the proposed more efficient burner chamber vortex = 18...36 speed = 2,8...225.

The proposed burner has a high efficiency, simple construction, has a long life, reliable, safe and simple in operation, low cost, combustion products environmentally friendly.

Industrial applicability of the claimed burners:

descaling and residue sand from castings in ferrous metallurgy;

for cleaning surfaces from sediments in the chemical industry;

for cleaning the underwater parts of ships from organic sediments and waste ink layer in the ship repair industry;

for the destruction of rock type limestone, granite, Sandstone in the mining industry;

for fracture of concrete, asphalt and brick construction;

for cleaning of airfields, roads and sidewalks of ice and snow in aviation and utilities;

for coating (in case of completion of the burner and of the known devices) of metals with a melting point of less than 1100oWith and polymeric materials;

for metal powders of metals with a melting point S="ptx2">

1. Gas burner with supersonic jet containing the crown with o-ring manifold fuel gas communicating throttling hole with the line supplying fuel gas and burner fuel gas, an air manifold which is connected to the main supply of air, a combustion chamber with a swirl in the cylindrical housing, sealed at one end with a head, and nozzle cap mounted on the other end of the cylindrical body, and the nozzle of the fuel gas on one side communicated with the fuel gas manifold, and the other with a cavity mixing combustible gas and air is formed by the end surface of the head and the surface of the swirler, characterized in that the head is made with a through hole in which you installed the spark plug, injector fuel gas is made in the form of an annular slit, swirl made in the form of a ring with diagonal grooves, evenly spaced around the circumference of its side surface, is fixed in the radial and axial directions in the cylindrical housing, an air manifold designed in to allow the cover and communicated with the main line inlet air throttling bore, a combustion chamber provided with a membrane between the outer struggling hard to keep myself from one side of the oblique grooves swirl with a cavity mixing combustible gas and air, but on the other hand with an air reservoir, and the shell of the combustion chamber with one end rigidly attached to allow the lid and the other end fixed to the swirl with the possibility of axial movement relative to it.

2. Burner under item 1, characterized in that the shell of the combustion chamber is installed on the swirl with a gap between the cylindrical surface of the ring and the inner surface of the shell, with the shell or ring made a number of evenly spaced around the circumference of the channels for the passage of air from the cooling system.

3. Burner under item 1, characterized in that the cavity of the mixing of fuel gas and air made extending toward the longitudinal axis of the swirl, and from the oblique grooves to zone output ring slits are narrowed.

4. Burner under item 1, characterized in that the through hole in the head from the combustion chamber is made with a diameter of 5-6 mm

5. Burner under item 1, characterized in that the cover is made of jet, cone-shaped, and coplowe hole is located on the side surface of the latter.

6. Burner under item 1, characterized in that the maximum area of the throttling holes for fuel g the th and pressure in the combustion chamber is not less than 0.08 and 0.1 MPa, respectively.

7. Burner under item 1, characterized in that the head, the swirl and the shell is fixed coaxially relative to each other.

8. Burner under item 1, characterized in that the axis of the throttling of the air hole and the axis of the nozzle is made to intersect.

 

Same patents:

Burner // 2064631

The invention relates to flame treatment of materials, namely, to designs of devices for gas-jet cutting of materials and solid rock

The invention relates to the field of combustion of gaseous fuel and can be used in open-hearth furnaces

The burner // 2003926

Burner // 2029194
The invention relates to heat engineering, in particular to equipment for the combustion of gaseous fuels

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.

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

FIELD: gas burning devices; treatment of metals and glass.

SUBSTANCE: proposed burner works on acetylene substitute gases, for example propane-butane, natural gas, and the like. Burner unit has head with oxygen and combustible mixture supply passage, tip and nozzle mounted coaxially at circular clearance; located between tip and nozzle in taper circular clearance is centering element for passage of combustible mixture which is provided with longitudinal passages on its outer surface in form of taper stepped bush dividing the taper circular clearance between outlet part of tip and nozzle into two circular chambers interconnected by means of radial holes; said element may be made in form of taper bush with stepped longitudinal passages divided into inlet and outlet parts by means of circular bore whose inner circular surface is provided with radial holes used for connection of cavity of circular bore with circular cavity between bush and tip; element may be also made in form of taper bush with longitudinal stepped and straight alternating passages; each outlet part of stepped passage has radial hole connecting the passage with circular cavity between bush and tip; cross-sectional areas of inlet and outlet parts of longitudinal stepped passages ranges from 1/2 to 1/4.

EFFECT: enhanced operational efficiency.

5 cl, 6 dwg

Gas burner // 2277672

FIELD: heat power engineering.

SUBSTANCE: gas burner comprises housing, mixer that is coaxially mounted inside the housing to define ring space, connected to the space through radial openings, and provided with the air nozzle at its exit, and ring collector that is provided with the rows of radial openings, abuts against the exit section of the mixer, defines the outlet passage, and is connected with the fuel source. The outlet passage is provided with the perforated converging nozzle at its exit, and insert provided with the central and axial passages at its outlet. The insert has injection system arranged together with the axial passages around the central passage at an angle to the axis of the burner and provided with the injecting and mixing passages separated by the ring bore which is connected with the outlet passage. The central passage receives the inlet nozzle that defines the ring space for connecting the outlet passage with the ring bore. The nozzle is secured to the outlet section of the mixer to define intermediate space connected with the mixer through radial openings made in the wall of the outlet nozzle. The axial passages together with the injection system connect the outlet passage with the mixer or intermediate space.

EFFECT: enhanced efficiency.

4 cl, 3 dwg

Gas-oxygen cutter // 2278326

FIELD: metal working.

SUBSTANCE: gas-oxygen cutter comprises handle provided with passages for flue gas and oxygen that receive valves for flue gas and oxygen, outer and inner nozzles secured inside the head and connected with the passages for flue gas and cutting oxygen, and means for protecting against flashback made of dissector of flame front into the fine flows. The flame front dissector is mounted in the head of the cutter and is made of porous ceramic members connected with the nozzles that close the passages for flue gas and cutting oxygen.

EFFECT: enhanced reliability.

5 cl, 3 dwg

Burner // 2278327

FIELD: combustion.

SUBSTANCE: burner comprises flange made of connecting pipe and provided with a baffle with central opening that receives tubular electrode to define heating member composed of evaporator and steam heater separated with a baffle. The evaporator mounted in the vessel is provided with grooves for discharging steam to the collector from the ring recess on the surface of the steam heater mounted outside of the vessel and capillary-porous shell. The dielectric pipe is mounted for permitting centering of the swirler, tubular electrode, and dielectric pipe and projects outside of the face of the tubular electrode. The stroke screw is arranged along the axis of the rod electrode in the face and is made for defining a space together with the face ring bearing surface that cooperates with the return spring and radial slot along the stroke screw. The stroke nut is secured to the stroke screw via the thread. The central opening is made in the ring bearing surfaces by means of one of which the stroke nut cooperates with the bearing collar of the slide and by the other one it mates the bearing collar of the push button clamped between the bearing surfaces of the stroke nut for permitting the axial reciprocation.

EFFECT: simplified structure and enhanced performance.

5 cl, 11 dwg

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