The device of the pulsating combustion for heating liquids

 

(57) Abstract:

The invention relates to energy and can be used to produce a pulsating flow of combustion products in a variety of hot water systems. The device of the pulsating combustion comprises a cylindrical combustion chamber with a resonance tube, the igniter, the aerodynamic valve, on the side wall of the combustion chamber is a gas ring manifold attached to the nozzle. The invention allows for complete combustion of fuel, reliable and stable operation, high efficiency. 2 C.p. f-crystals, 2 Il.

The invention relates to energy and can be used to produce a pulsating flow of combustion products in a variety of hot water systems.

Method of pulsating combustion, due to its high energy efficiency, absence of harmful emissions and constructive simplicity, finds increasing application in the energy sector. Known devices of the pulsating combustion, operating on gaseous or liquid fuel and comprising a cylindrical combustion chamber with the resonant pipe and aerodynamic valve in the pipe [Teploenergetika, No. 9, 1965, S. 25; the General ability of the camera to the pulsating combustion (CNG) with the introduction of heated air and at the opposite suction emitted from valve hot products of combustion;

- lack of reliability and stability CNG;

is quite a small area of the heating surface.

The above shortcomings can lead to chemical underburning, limiting the field of sustainable operation of CNG in pulse mode, reducing the efficiency of the camera.

Closest to the invention is a device of the pulsating combustion, containing a cylindrical combustion chamber with a resonance tube, the igniter and the aerodynamic valve in the form of a pipe, inside of which is coaxial with him on the end side of the combustion chamber in the center there is the nozzle [thermal engineering, 1965, N9, S. 25].

A significant disadvantage of this device is low, the combustion completeness in some modes of operation of CNG. In the chamber formed by local zones of incomplete mixing. On the periphery concentrate the greatest amount of CO. The oxygen content has the opposite character; the maximum oxygen concentration is observed in the center. This poses a chemical underburning, decreases the efficiency of the device. In addition, the device has a number of disadvantages:

- aerodynamic valve ineffective in terms of air heating and reverse suction vibrationcritical affects the reliability and stability of operation of the camera;

the geometry of the CNG is not possible to effectively transfer heat to an external fluid because of the small size of the area of the heat-release surface.

The development of highly efficient heater fluid based on CNG, ensuring complete combustion, reliable and stable operation, high efficiency.

This technical result is achieved by the fact that in the proposed device on the side wall of the combustion chamber is a gas ring manifold attached to the nozzle. The axis of the nozzle at the intersection of the radius and the longitudinal axis of the chamber to form certain angles depending on the number of nozzles and the height of the device, respectively. The igniter is installed near the gas collector. The outflow of gas from inclined nozzles into the cavity of the chamber allows the ejection of the necessary combustion air. Intensive mixing of gas and air is implemented by the spin of the gas-air mixture and the partial threading each other jets emanating from the adjacent nozzles. When the burning mixture over the collector sets the combustion zone. In the chamber is excited pulsating combustion due to the fluctuation of the air flow over the collector nozzles. In half with polozhitelneishie ejection. Fluctuations in the latter play a positive role in the aerodynamic valve, contributing at the required time increases suction capacity, or inhibition resulting from the gas.

Aerodynamic valve in the proposed device is designed as a cylindrical ring formed by the bottom of the combustion chamber in the form of glass that have been inserted in the side wall of the chamber. This configuration of the valve due to the fact that in the phase of suction is provided equally full air flow to all nozzles, the consequence of which is a uniform distribution of the gas-air environment throughout the volume. This contributes to the stability of the camera in burst mode, the completeness of combustion, the efficiency of the installation.

Plant efficiency is significantly increased by changing the geometry of the resonant pipe. In this device the portion of the resonance tube is made in the form of a battery of pipes of smaller diameter, is placed in the combustion chamber. The cross-sectional area annulus battery is equivalent to the square of the transverse lower part of the resonator in the shape of a cylindrical pipe. Thus are provided the form has a large surface, which leads to the improvement of the efficiency of the device as a heater liquid.

Liquid heater schematically depicted in Fig.1. Pneumohydrosystems water heater shown in Fig.2.

The water heater consists of a gas ring collector 1 nozzles 5, the heat exchanger 2 with the combustion chamber, the ignition device 3, the resonant pipe 4, the system manual and automatic control, alarm system.

Gas collector ring 1 is attached to the wall of the combustion chamber by means of brackets 14. The angle of the nozzle axis to the radius of the ring can be 10 - 45oand to its longitudinal axis 5 - 25o. The heat exchanger 2 is made as one unit with the combustion chamber and has two cooling jacket: inner 6 and outer 7, the combustion chamber 8, a cover 9, steinebrunner the bottom 10.

The inner cooling jacket is a series of longitudinally spaced tubes, the bent ends of which are welded to the wall of the combustion chamber. The inner and outer walls of the combustion chamber to form an external cavity 7 of the heat exchanger 2, through which the pipe 11 communicates with the tank 12.

Ignition device 3 in the form of injection burners installed naiste.

The heat exchanger closed top cone-shaped lid, which established part of the resonant pipe 4. The lower part of the heater between the heat exchanger 2 and the gas ring collector 1 plays the role of the combustion chamber 8.

Aerodynamic valve is made in the form of a cylindrical ring 13 formed by the bottom of the combustion chamber 10 in the form of glass and inserted him in the side wall of the combustion chamber 8.

The device operates as follows.

The container 12 ( Fig.2) is filled with water, which flows through tubes in both cavity (external and internal) heat exchanger 2. The heater works on associated gas, which is supplied to the gas ring manifold through the pipeline 15. The igniter 3 gas enters through line 16. When opening the main valve 17, the gas is supplied to the expenditure valve 18, which sets the necessary gas pressure before the nozzle igniter 4, a conventional tunnel burner [Mursalov centuries fundamentals of theory and practice of flaring gas in the steam boilers. M: Energy, 1969]. For supply of gas to the nozzle opens the pneumatic valve 19 igniter 3. Gas-air mixture is ignited by a spark plug placed on tunnels steady flame.

The gas pressure in the pipeline 15 is determined by the pressure gauge 21. The required gas pressure for the gas supply ring collector is set by the gear 22 and is controlled by the pressure gauge 23. Admission otregulirovannogo gas to inclined nozzles collector provides electroneurography 24 in the open position. Resulting from inclined nozzles 5 gas fuel injects the proper amount of air for combustion. The mixing of gas and air takes place in the combustion chamber 8. High mixing quality is achieved by a collision of two neighboring jets, as well as the spin of the gas-air mixture in the combustion space. The prepared mixture is ignited by torch igniter 3. The flame front is instantly distributed by the gas mixture and the inclined nozzles 5, provides a diffusion combustion. Torches are located at the lower edge of the heat exchanger with the combustion chamber and have a high sensitivity to external perturbations. The camera is in the mode of pulse combustion in soft mode. The pulsating flow of combustion products actively gives off heat elements heat exchanger. As water is heated in the heater - capacity" begins an intensive circulation of proci the igniter 3 is stopped automatically. The signal from the flame sensor, placed in the igniter is supplied to the control unit 20, which is formed by the closing of electroneurography 19 and 24. The valve 25 has, in addition, manual control gas flow into the reservoir 1.

1. The device of the pulsating combustion, containing a cylindrical combustion chamber with a resonance tube, the igniter, the aerodynamic valve, characterized in that on the side wall of the combustion chamber is a gas ring manifold attached to the nozzle.

2. The device under item 1, characterized in that the aerodynamic valve is made in the form of a cylindrical ring formed by the bottom of the combustion chamber in the form of glass and inserted him in the side wall of the chamber.

3. The device under item 1, characterized in that the portion of the resonance tube is made in the form of a battery of pipes of smaller diameter, is placed in the combustion chamber.

 

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