Luggage pulsating combustion for heating water
(57) Abstract:The invention is intended for the organization of the pulsating combustion of gaseous and liquid fuels in heaters liquids of different capacities. Aerodynamic valve has the form of the expanding channel with variable cross-sectional area and formed the bottom of the combustion chamber with an opening and a solid object. The invention allows to create a fluid heater, reliable and stable operation in a wide range of regulation of the heat loads with high efficiency and improved environmental parameters on emissions of harmful substances. 1 C.p. f-crystals, 2 Il. The invention relates to a power system and can be used to organize the pulsating combustion of gaseous and liquid fuels in heaters liquids of different capacities.A widely used method of pulsating combustion devices designed for heating liquids. These devices are based on the camera pulsating combustion gas (CNG) and is functionally composed of a camera ignition, resonance tubes, aerodynamic valve, nozzle, trigger igniter. Combustion of gaseous and liquid fuels to CNG allows you to strictly follow cologone fuel combustion, in addition, in certain conditions intensifies the convective exchange. The degree of intensification of heat transfer in a greater degree depends on the amplitude of the pulsations. However, due to the small surface area of the heat to transfer heat to an external fluid, the use of CNG water heaters large amounts is not always practical.In the cells of the pulsating combustion is most often used aerodynamic valves with constant aerodynamic sizes. The disadvantage of such valves is that their effective application occurs in a narrow range of thermal loads.The decrease and increase of fuel consumption impairs the operation of the valve associated with large losses of heat in the emission of gases and insufficiently intense suction of air into CNG. As a result of this deteriorates the efficiency of combustion, increases chemical underburning, decreases the efficiency of the camera (see and.with. THE USSR 922427, IPC F 23 11/04, 1982).The closest in technical essence to the proposed camera is a CNG containing installed in the cavity of the nozzle with the igniter, and is connected to the output area chamber resonator and aerodynamic valve in the form of a pipe. The resonator SS="ptx2">The disadvantages of the prototype in the first place, should be attributed to the high hydrodynamic resistance in the tube bundle, caused by the bend at a right angle near the connection with the camera. In these conditions obtain large values of the amplitudes of the pressure becomes very difficult, especially at elevated fuel consumption. This reduces the intensity of convective heat transfer, increases chemical underburning. In addition, the side connecting tube bundle increases the dimensions of the installation.The prototype has an aerodynamic valve tubular form. When forced modes of the aerodynamic valve large quantities of hot unburned gases, which again fall into CNG. However, a significant part of the gas remains in the atmosphere, which significantly affects the environmental setting parameters, reduces the efficiency of CNG. The reduction of the flow of fuel to the camera settings to the mode of low load leads to failures and breakdowns of pulsating combustion. This is primarily due to the dependence of the amplitude of pulsations of pressure in the chamber from the air excess factor. The amount of intake air in depends largely on the California heater fluid, reliable and stable operation in a wide range of regulation of the heat loads with high efficiency and improved environmental parameters on emissions of harmful gases.This technical result is achieved by the fact that the camera pulsating combustion contains a cavity made in the form of a bundle of tubes, the burner with the igniter, the aerodynamic valve connected to the combustion chamber and formed by the bottom of the combustion chamber with an opening and a solid object located near a hole, while the aerodynamic valve has the form of the expanding channel with variable cross-sectional area, and the tube bundle is connected to a cylindrical combustion chamber coaxially.In Fig. 1 shows a camera pulsating combustion, General view, Fig. 2 depicts the water heater operating on the principle of pulsating combustion.Luggage pulsating combustion includes (see Fig. 1) aerodynamic valve, made in the form of diverging from the center of the channel formed by the bottom 1 camera and a solid object placed in the holes 2 of the bottom, such as disk 3. Valve design if necessary involve changing the sectional area of the channel. The latter is achieved by varying the distance the fair burner 4. The ignition device 5 is placed at the output end of the injection burners 4. The combustible mixture is ignited by ignition device 5 and the combustion chamber is initiated pulsating combustion with a sharp increase of pressure and temperature. Starts gases flow in the direction of the resonator 7 and the aerodynamic valve. Hot gases escaping from the holes 2 on day 1 of the camera, go into the channel of the aerodynamic valve, where the deceleration of the flow. Inertial delay the development of the backward emission of gases from the chamber through the aerodynamic valve and a mass of cold air trapped in the path of the valve. Due to the inertia of the column of gases in the combustion chamber creates a vacuum. Emitted from the vent hot gases are absorbed back into the camera. In the path of the valve is active mixing with the fresh air. The aerodynamic design of the valve during reverse movement of the gases in the chamber provides the lowest hydrodynamic resistance in the gas path. The combustion chamber is again filled gas-air mixture. During the suction of the injection burners in the combustion chamber tangentially served fresh fuel, thereby further intensifying the process of mixing the internal walls of the combustion chamber. The optimal value of the coefficient of excess air in the chamber under high or low loads supported by changing the sectional area of the channel of the aerodynamic valve. This valve device ensures stable and efficient operation of the camera, complete combustion of fuel in a wide range of regulation of the heat loads, improved environmental parameters on emissions of combustion products into the environment.The resonator is made in the form of a bundle of pipes attached to the output section of the combustion chamber coaxially and allows to reduce the dimensions of the device. The number of pipes is determined based on the required geometric relationships CNG. Pulsating after the hot products of combustion through these pipes contributes to intensive heat transfer to the external coolant. The greater the amplitude of the pressure pulsations, the greater the effect of heat transfer. Relatively low hydrodynamic resistance of the resonator does not preclude obtaining the desired amplitude of pressure pulsations in the camera. Thus, the proposed facility has improved performance, higher efficiency.The water heater working in PR is ex pipe 9, axis which is parallel to the axis of the combustion chamber 8, the aerodynamic valve 10 with injection burner 4 and the ignition device. In addition, the heater includes a control system and alarm system 11. The combustion chamber 8 with the resonant pipe 9 in the vessel 12 is fixed in three places: the free ends of the resonant pipe 9 through the ferrule 13 is bonded to the upper bottom of the tank 12, a support 14 to provide a rigid attachment of the combustion chamber 8 with the lower part of the vessel 12, the third attachment point is the connection pipe 15 with a capacity of 12. Aerodynamic valve 10 includes a disk that is mounted on a special axes 6. The drive has the ability to move relative to the side wall of the vessel 12 along the body injection burners 4-axis 6. Injection burner 4 with the firing device is eccentric to the pipe 15.The device operates as follows.The container 12 (see Fig. 2) through the neck 17 is filled with water. Passing gas through the pipeline 18 through the main valve 19 and the control unit (cu) 20 enters the injection burner 4. The gas pressure in the gas line 18 is measured by the pressure gauge 21. In BU 20 associated gas is reduced to the required values of p, where p is the gas pressure is passed into the combustion chamber 8. From BU 20 the voltage applied to the ignition device. The hearth flame ignites the gas-air mixture that has accumulated in the combustion chamber 8. As a result of rapid combustion of the ignited mixture generates a wave of compression, which, interacting with the flame, will accelerate the process. In the combustion chamber 8 is installed relaxation burning. Stabilization relaxation combustion occurs due to the eddy currents that occur at the walls of the combustion chamber 8 in the phase of depression. Pulsing stream flowing through the resonance pipes 9, intensifies the convective heat transfer. To prevent failure of the pulsating combustion at low loads and ensure complete combustion at elevated fuel consumption aerodynamic valve 10 is made adjustable. The setting of the valve 10 to another mode by changing the position of the disc relative to the vessel 12. Water as heat through the valves 22 and 23 is supplied to the consumer. In case of failure of combustion, the alarm unit 11 generates a command to shut off the gas supply and transmits it to the Executive unit - the control unit 20. 1. Luggage pulsating combustion, containing a cavity made in the form of a bundle of tubes, the burner with the igniter, the aerodynamic valve, otlidas hole and a solid object, located at the openings has a shape extending channel with variable cross-sectional area.2. Luggage under item 1, characterized in that the tube bundle is connected to a cylindrical combustion chamber coaxially.
FIELD: methods for burning of solid fuel.
SUBSTANCE: the method for salvaging of trinitrotoluene, whose term of safe storage has expired consists in the fact that trinitrotoluene is fed to the combustion chamber in a melted state (at a temperature of 80 to 90 C) and burnt off in the atmosphere of gaseous fuel-methane not containing oxygen in its composition, as a result of burning due to own oxygen of trinitrotoluene, a great amount of own carbon (soot) is extracted, which then finds industrial application. For burning of trinitrotoluene use is made of an installation including a combustion chamber, pressure regulators for delivery of molten trinitrotoluene and gaseous fuel (methane), electric igniter and a filter for catching soot.
EFFECT: provided safe method for salvaging of trinitrotoluene in the combustion chamber in the atmosphere of gaseous fuel (methane).
2 cl, 1 dwg
FIELD: combustion apparatus for fluent fuels.
SUBSTANCE: method comprises supplying gas to be burnt out from the head of the burner of the torch plant in the combustion zone. The composition of gases is variable. The gas flow rate varies from 1m/s to 3.5 of sound speed due to generating excess static pressure of gas from 0.00001 MPa/cm2 to 3.0 MPa/cm2 by the movable control device. The gas jet is turbulent with a cone angle from 2o to 155o.
EFFECT: enhanced efficiency.
FIELD: combustion apparatus using fluent fuel.
SUBSTANCE: burner comprises casing made of a scroll, hollow shaft for fuel supply arranged inside the casing, sucking and exhausting branch pipes for air secured to the casing, nozzle mounted in the conical sleeve, diffuser, and drive. The shaft is mounted for rotation and provided with blades of the fan. The nozzle and conical sleeve are secured to the hollow shaft. The drive is secured to the casing inside the sucking branch pipe. The branch pipe is mounted with a space relation to the casing to provide a space for air flow. The shaft of the drive is hollow to provide fuel flow to the nozzle. The shaft of the drive and hollow shaft of the burner are axially aligned and interconnected. The drive shaft is provided with emulsifier for generating emulsion or suspension and supplying fuel and/or water emulsion and cock for fuel supply.
EFFECT: enhanced efficiency.
2 cl, 1 dwg
FIELD: methods of combustion of hydrocarbon fuels.
SUBSTANCE: the invention is dealt with the method of combustion of a hydrocarbon fuel in a burner. The method of combustion of hydrocarbon fuel in a burner provides, that along the burner external surface a non-corroding technical atmosphere is set in motion, chosen from a group including steam, CO 2 , nitrogen or their mixture. In the capacity of the non-corroding technical aerosphere they use steam. Combustion is carried out at the presence of steam. At least a part of the non-corroding aerosphere is added to the hydrocarbon fuel. The non-corroding aerosphere is used in an amount sufficient to dilute or replace a corroding technical aerosphere existing around the external surface of the burner. The invention allows to avoid a corrosive spraying of the metal and carbonization of the industrial burners exposed to action of the corroding technical aerosphere.
EFFECT: the invention allows to prevent a corrosive spraying of the metal and carbonization of the industrial burners.
5 cl, 1 dwg
FIELD: methods of burning pulverized fuel.
SUBSTANCE: proposed method includes preparation of fuel for burning, delivery of fuel, transportation of high-pressure air, mixing air with pulverized fuel and delivery of high-concentrated aeromixture to boiler burners. Transporting air is ozonized before mixing it with pulverized fuel ; part of ozonized fuel is delivered to transport of pulverized fuel and remaining part is delivered autonomous passage of burner to flame root via pipe line.
EFFECT: steady ignition of pulverized fuel; enhanced efficiency of burning process.
FIELD: methods of burning hydrocarbon fuel.
SUBSTANCE: proposed method of combustion of hydrocarbon fuel includes separate delivery of fuel and air to burner; fuel is delivered mainly to central area of air flow and is burnt over periphery of flame at excess air mode and at excess of fuel in central area of flame; vapor is fed to central area of flame and field of acoustic oscillations is applied. Burner proposed for burning the gaseous hydrocarbon fuel includes air box, hollow gas manifold with outlet gas holes; it is coaxially arranged inside vapor swirler manifold made in form of hollow cylindrical body with profiled passages and mounted in cylindrical body at radial clearance; cylindrical body has nozzle hole; one end face of vapor swirler is blanked-off and opposite end face is smoothly engageable with nozzle hole in body. Burner for combustion of liquid hydrocarbon fuel includes air box and injector mounted on fuel swirler and vapor swirler which are mounted in cylindrical body at radial clearance; said cylindrical body is provided with nozzle unit made in form of hollow detachable cap with holes over spherical end face; mounted at spaced relation inside this cap is cap of smaller diameter and similar in shape; smaller cap has holes which are coaxial to outer cap; outer cap is provided with additional holes; inner cap is not provided with such holes.
EFFECT: reduction of nitrogen oxide emissions by power-generating boilers at enhanced combustion of fuel.
5 cl, 5 dwg