A method of burning fuel

 

The invention relates to fuel combustion in the vibrational mode. A method of burning fuel is fed to the burner with subsequent mixing with air and burning, and the air before supplying the mixture of fuel passed through the Electromechanical generator with rotating flaps that overlap on 3-97% channel air flow from the electric motor rotation speed 1000-6000 mm. revolutions per minute and the frequency of oscillation of the air flow 30-600 Hz. The invention allows to reduce vibration equipment, to improve combustion stability and reduce the cost of fuel combustion. 5 Il.

The invention relates to the field of preparation and combustion of fuel (gas, fuel oil and others) in the gas-dynamic mode and can be used for etc.

The best known and most used types of fuel combustion in gas-dynamic mode are vibrating and oscillating combustion.

During the 50-60-ies of the 20th century were created devices that implement oscillatory combustion with impact on the flow of air-fuel mixture ultrasonic vibrations [1] and others, the impact of these fluctuations on the process of mixing and combustion of fuel for the market open torch in his separate areas 200-300With [2] and increase heat transfer from the flame to the wall by 10-30%.

The lack of resonance of vibrating systems of combustion is a complex organization of steady vibration mode.

Currently in Russia and abroad developed many devices that implement oscillatory combustion, by means of which burn solid, liquid and gaseous fuels. The main physical method, which implements the specified combustion is intermittent oscillatory flow of air into the combustion chamber [3], pulsed supply of fuel into the chamber through a special injection devices [4] and intermittent air supply.

The use of the positive aspects of vibratory and oscillatory combustion is relevant, but the practical use of these devices is still insufficient, which is associated with a weak knowledge of oscillatory processes and the lack of experimental testing devices [5].

A known method of burning fuel [6], according to which the oil is fed through a resonant pipes, reactors, carburettor and fuel injector in cell block vibration burning, equipped with an acoustic resonator in which it is mixed with air and burned. Prelector camera works through the waveguide at each other. This ensures the connectivity of the cameras as speakers.

Using this method showed that vibration is the number of destruction in the design of the cameras, so further structural refinement.

Known another method of burning fuel [7], we adopted for the prototype. According to this method, the fuel coming out of the burner, down through the two nozzles connected with jet generator of oscillations, the air is mixed with fuel. Alternate expiration of air from the nozzles affects the torch from opposite directions, forcing him to cross on its axis fluctuations. As a result, the torch becomes steady turbulent structure, and oxidation of the fuel particles is more intense and complete that reduces chemical incomplete combustion of the fuel.

The disadvantage of the proposed method is a significant increase in noise, increase the pressure oscillations within the combustion chamber and vibration equipment.

The objective of the proposed technical solution is to increase the efficiency of fuel combustion - noise reduction, pressure fluctuations within the combustion chamber, vibration equipment is willow, lies in its submission on the burner with subsequent mixing with air and combustion air prior to the mixing with the fuel is passed through Electromechanical air generator (AMWG) c rotary damper, partially overlapping channel the air flow from the electric motor rotation speed when the number of revolutions of the motor (COE) 1000-6000 mm. / minute. The degree of overlap channel air supply (SPKV) rotary dampers ENGG varies in the range 3-97%, and the frequency of oscillation of the air flow (CCVP) - in the range of 30-600 Hz.

The degree of activation of the air flow (SAIT) depends on SPKV dampers MMG [8]. At low SPKW - less than 20% SAIT significantly reduced. With increasing SPKV above 80% increases SAIT, but significantly decreases the performance of the installation EMWG.

COE torque damper AMWG is 1000-6000 mm. / minute. Reducing COE below 1000 per minute reduces SAIT, and increase choe more than 6000 per minute theoretically and practically possible, but not economically feasible, as it increases the cost of construction ENGG.

CCVP is in the range 30-600 Hz and regulated by CAA and rotational flaps ENGG. The maximum efficiency (regardless of the type of fuel combusted) dentistrythe with CKIT 100-200 Hz.

In the process ENGG can happen fluctuations of gas in a rotating electromagnetic field (compression, rarefaction of gas and others). Therefore, it may be a heating gas and the activation of its components (oxygen, nitrogen, carbon dioxide, water and other), as well as the formation of water vapor hydrogen peroxide, BUT.2and.OH radicals. As a consequence, the reactivity of the components of the air may rise significantly.

The essence of the proposed method is illustrated by examples.

Example 1. Functional diagram of the installation for the production of black gravel and asphalt using EPSG factory Yekaterinburg road construction Department "Sverdlovskavtodor", the village Beloyarsky, shown in Fig.1.

In this scheme, the fuel oil from the tank 8 by the pump 7 through the fuel line 6 is fed to the burner 2, where it is mixed with air supplied by the fan 5 through ENGG 4 through the duct 3, when the degree of overlap of the channel airflow 3-97% and the number of revolutions of the motor 3000 per minute, and burned. In the drying and mixing drum 1 with the burner 2 is provided drying black gravel, mixing, heating and preparation of asphalt mixtures.

The results ol the nutrient consumption of fuel oil in the preparation of asphalt concrete.

Example 2. Industrial tests were carried out on steam gas boiler E-1,0-0,9 G-3 in the boiler room of the state production Association "TECH", Ekaterinburg. Setup is shown in Fig.2.

According to this scheme, the fan 5 through the gate 9 and ENGG 4 through the duct 3 supplies air to the burner 2, where it is mixed with fuel and burned. Fuel combustion is used to heat a steam boiler 10.

The test results are summarized in table 2. As the table shows, with increasing speed ENGG from 2000 to 6000 rpm specific gas consumption of 1 Gcal of thermal energy decreases 1.43-7,27%.

Example 3. Industrial tests were carried out in the technological cycle cupola furnace Nizhny Tagil boiler and radiator plant. As AMUG used the device for intensification of combustion of solid fuels in combustion systems with grate combustion [9] (U.S. Pat. NO. 2149311, 7 F 23 1/16 IN). Setup is shown in Fig.3.

In this scheme, the air ventilation system 5 is supplied to the heat exchanger 11, which is heated to the required temperature and then the duct 3 is supplied to the injection nozzles 13 with installed ENGG 4, where it is activated and served in Varenichnaya years).

The test results presented in table 3.

Data analysis the table shows that when working ENGG achieved growth of melt temperature on average 30-40From the initial (maximum of 70-75With by reducing the viscosity of the melt). The productivity of the furnace is increased by 10% and reduces the specific fuel consumption as per one ton of produced pig iron, and one ton of finished product (5-10%).

Example 4. Conducted industrial trials for inclusion AMWG in the technological cycle of mineral wool production. As AMUG used the device described in example 3. According to the scheme of Fig.4, the air fan 5 through the duct 3 through the gate 9 is supplied to AMWG 4, and then in the cupola furnace 16. The results are given in table 4.

The table shows that when working AMWG in the process line temperature in the furnace and the temperature of the released melt increase by 80-100C. growth temperature of exhaust gases above the layer of slag, Fig.5. In Fig.5 shows the dependence of the temperature change,With, the exhaust gases above the layer of slag at the cupola, from time �//img.russianpatents.com/chr/176.gif">C. (the engine speed ENGG - 3000 rpm, the frequency of oscillation of the air flow 100-300 Hz.)

Thus, the appearance of the flame takes place at 410With (AMWG) and at 400With (without EMVG). When you start ENGG increasing the pressure in the injectors (at the output of the air in the oven) for 30%, which indicates an increase of the linear velocity of the air flow and therefore its kinetic energy.

When using EPSG, table 4, the production line capacity is increased by 10% and reduced by 10% specific fuel consumption.

Comparison of the proposed method with the prototype [7] shows the efficiency of fuel combustion. Since the preparation of the air before mixing with the fuel takes place in a separate apparatus (AMWG), the noise and pressure fluctuations within the combustion chamber are not observed. Work AMWG by the proposed method in comparison with the prototype [7], characterized by stability, which eliminates vibration of the equipment and the instability of the combustion fuel. In addition, the proposed method, unlike the prototype [7], allows to reduce fuel consumption for combustion and to increase the temperature of the process without changing technological regimes FLC question about the influence of ultrasound on the process of combustion/thermal engineering. 1962. No. 1.

3. A. C. 228217 the USSR, class 24 century. Device for pulsating combustion. BI. 23.05.1969.

4. Gilad C. J. Thermal performance fuel. The use of gas and fuel oil in the industrial/Modern methods of burning liquid fuel. VINITI. M., 1965, 1967.

5. Podymov C. N., The northerner C. S., Liquor J. M./Applied research vibrating combustion. Kazan. The University of Kazan. 1987.

6. Babkin Y. L., A. Shilin N. Block cameras pulsating combustion of fuel oil BKK-5000. Pulsating combustion. Chelyabinsk: Proceedings of the ito EP. 1968.

7. A. C. 249534 the USSR, class 241.5. The method of burning liquid and powdered fuel. BI. 26.12.1969.

8. Pat. OF THE RUSSIAN FEDERATION NO. 2131557, MKI 6 F 23 R 3/04.

9. Pat. OF THE RUSSIAN FEDERATION NO. 2149311, MKI 7 F 23 B 1/16.

Claims

A method of burning fuel, that consists in its submission on the burner with subsequent mixing with air and combustion, characterized in that the air prior to the mixing with the fuel is passed through the Electromechanical generator with rotating flaps that overlap on 3-97% channel air flow from the electric motor rotation speed 1000-

 

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