A method of burning fuel oil and a device for its implementation

 

(57) Abstract:

The invention relates to the field of heat and is designed for combustion of fuel, mostly liquid in boiler furnaces, stoves and energy-technological units for the preparation of fluid and thermal treatment of industrial waste and can be used for burning fuel oil and other liquid fuels in different fuel combustion devices. The technical result consists in increasing the quality of combustion, reducing the content of nitrogen and sulfur oxides in the combustion products and the improvement of its dispersion characteristics, is ensured by the fact that in the proposed method, conduct secondary mixing the resulting primary fuel-air mixture with fuel oil, which additionally serves twisted counter flow at an acute angle to the direction of flow of the fuel-air mixture. In addition, the device for implementing the method of burning fuel oil is supplied by the secondary mixer and additional tangential feed of fuel, secondary mixer is installed coaxially with the main mixer, and a flow channel of air or steam into the main mixer is made in the form of the injector, and the main CME is using a tangential flow channel of the fuel oil summed up in the secondary mixer. 2 S. and 2 C.p. f-crystals, 5 Il.

The invention relates to the field of heat and is designed for combustion of fuel, mostly liquid in boiler furnaces, stoves and energy-technological units for the preparation of fluid and thermal treatment of industrial waste, and can be used for burning fuel oil and other liquid fuels in different fuel combustion devices.

The known method of heating oil on the author's certificate of the USSR 1263967, CL F 23 D 5/00, 1986, whereby the mixing of the components are a pair of ejection active jet fuel.

The main disadvantage of this method is the low quality of fuel combustion.

A known method of burning fuel oil in the author's certificate of the USSR 1455128, CL F 23 9/00, F 23 D 11/00, 1989., adopted by the applicant for the prototype. According to this method, part of the fuel oil pre-assign and serves on the axis of the vortex combustion chamber together with the gases recirculated air supplied to the annular jet around the axial flow part of the oil.

The disadvantage of this method is insufficient dispersion of the fuel and low quality combustion.

Known nozzle on the author's certificate of the USSR 1361426, to the peripheral channels, and a valve mounted in the inner channel with the possibility of longitudinal movement, both the housing and the spool is made in the cross-section of rectangular shape with abutting one to another lower base and with the formation of the peripheral channel on one side only, the opposite grounds, and the spool is made with an oblique cut, facing in the direction of fuel flow.

The disadvantage of this nozzle is that obtained by the air-fuel mixture has insufficient dispersion and low quality combustion.

Known burner device according to the author's certificate of the USSR 1328640, CL F 23 D 5/00, 1987, adopted by the applicant for the prototype. It includes a housing coaxially with the mixer in the form of a Laval nozzle, the Central fuel tube and channel recirculation of products of combustion, with the mixer set hassebroek connected to the fuel tube by means of recirculation of combustion products. Hassebroek made in the form of a tube with an open end, is placed opposite to the mixer. In addition, hassebroek can be made in the form of a header with perforated walls, perforation which is located opposite to the mixer and the fuel tube and the channel rnu provides receiving and combustion quality.

An object of the invention is to improve the quality of combustion, reducing the content of nitrogen and sulfur oxides in the combustion products and the improvement of its dispersion characteristics.

The problem is solved in that in the proposed method, conduct secondary mixing the resulting primary fuel-air mixture with fuel oil, which additionally serves twisted counter flow at an acute angle to the direction of flow of the fuel-air mixture.

In addition, the device for implementing the method of burning fuel oil is supplied by the secondary mixer and additional tangential feed of fuel, secondary mixer is installed coaxially with the main mixer, and a flow channel of air or steam into the main mixer is made in the form of the injector, and the main mixer and second mixer connected to each other via a channel, which is made in the form of an injector, and an additional tangential flow channel of the fuel oil summed up in the secondary mixer.

In addition, the primary and secondary tangential input channels have separate oil flow through the pressure regulators and at length made with the possibility of counter filing mA and steam and the fuel-air mixture.

In addition, additional tangential flow channel of the fuel oil is placed symmetrically to the main channel of the fuel oil supply.

In Fig.1 shows a device for burning fuel oil, General view;

in Fig.2 - section a-a in Fig.1;

in Fig.3 - section b-B in Fig.1;

in Fig.4 - section b-b In Fig.1;

in Fig.5 - spiral groove on the surface of the supply channel of the fuel oil.

The device for implementing the method of burning fuel oil includes a housing 1, a tangential channel 2 fuel oil supply and tangential channel 3 supply of air or steam. In case 1 the main mixer 4 and the secondary mixer 5 coaxially with the main mixer 4. Channel 3 supply of air or steam into the main mixer 4 is supplied by the pressure regulator 6 and the receiver 7 with tangential swirler 8, and the output end thereof is made in the form of the injector 9. And the main mixer 4 and the secondary mixer 5 are interconnected by a channel, which is made in the form of injector 10. The device is equipped with additional tangential channel 11 of the fuel oil supply, which is summed up in the secondary mixer 5 and equipped with a pressure regulator 12 of the fuel oil supply or overlap. Channel 2 of the main fuel oil supply system is also equipped with a pressure regulator 13. Kanau 15 in front of the furnace and mixing it with the already prepared fuel-air mixture. Moreover, the tangential channels 2 and 11 have separate feeding and at length made with the possibility of counter-feed at an acute angle 16 of the oil in the mixer 4, or 5 twisted opposite stream through the spiral groove 17, is executed on the conical surface 18 of each channel 2 and 11. That is, the output ends of the channels made under counter acute angle to the axis of the device and the feed direction, respectively, of air or steam and the fuel-air mixture. As well as additional tangential channel 11 and the main channel 2 fuel oil supply placed symmetrically about the axis of the device. Moreover, additional tangential channel 11 is made in a clockwise direction, and the main channel 2 counterclockwise.

The method is as follows.

Channel 3 supply air or steam serves the air, twisting through the swirler 8, accumulates in the receiver 7 and passing through the injector 9, are included in the main mixer 4 with high blood pressure. Here, in the main mixer 4, the tangential channel 2 serves the oil, swirling through the spiral groove 17 under pressure not more than 0.3 air pressure. When two flows directed towards each other, under the OST is the author of power picks up and entrain air or steam flow, mixing and forming the fuel mixture, which is then through the injector 10 is fed into the second mixer 5. In the secondary mixer 5 conduct secondary mixing already initially received in the main mixer 4 of the fuel-air mixture with fuel oil, which additionally serves twisted with spiral grooves 17 for additional tangential channel 11 counter flow at an acute angle 16 to the feed direction of the obtained air-fuel mixture. The supply pressure of the oil in the channel 11 is also equal to not more than 0.3 pressure supply of air or steam. In the secondary mixer 5 is the same process as in the main mixer 4. At a meeting of the flows of fuel-air mixture obtained in the main mixer 4, and fuel oil, additionally filed on channel 11, is generated torque of the fuel particles, which under the action of centrifugal force picks up and entrain the air / fuel mixture, enriches it with oil, additionally enjoyed, and enriched mixture enters the oil-gas burner 15. Restriction of feed pressure oil in the amount of 0.3 from the air pressure selected from the conditions of safe operation. If you apply the oil with high pressure, the fuel-air mixture policits is SS="ptx2">

The use of the proposed solutions helped to reduce the content of nitrogen and sulfur oxides in the combustion products, to eliminate the smoke environment, to improve the dispersion characteristics of the fuel, thereby to improve the quality of combustion and to increase fuel economy and improve the environment.

1. A method of burning fuel oil by mixing with air or steam, characterized in that conduct secondary mixing the resulting primary fuel-air mixture with fuel oil, which additionally serves twisted counter flow at an acute angle to the direction of flow of the fuel-air mixture.

2. Device for burning fuel oil containing tangential channels of supply of oil and air or steam receiver with vane swirler, mixer, characterized in that it is provided with a secondary mixer and additional tangential feed of fuel, secondary mixer is installed coaxially with the main mixer, and a flow channel of air or steam into the main mixer is made in the form of the injector, and the main mixer and second mixer connected to each other via a channel, which is made in the form of the injector, and the additional one is the, what primary and secondary tangential input channels have separate oil flow through the pressure regulators and at length made with the possibility of counter fuel oil supply to the mixer twisted opposite stream at an acute angle to the feed direction, respectively, of air or steam and the fuel-air mixture.

4. The device according to p. 2, characterized in that the additional tangential flow channel of the fuel oil is placed symmetrically to the main supply channel of the fuel oil.

 

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