JP3138647U7 - - Google Patents

Description

Oil / water mixing and combustion equipment

The present invention relates to an oil-water mixed combustion apparatus, and more particularly to a technique that enables oil-water mixed fuel to be efficiently burned by a swirling airflow and used as various heat sources.

As this type of oil-water mixed combustion apparatus or burner, for example, one described in Patent Document 1 (referred to as the former apparatus) and one described in Patent Document 2 (referred to as the latter apparatus) are known. The former device (oil-water mixed combustion device) mixes and burns oil and water at a ratio of 1: 1, and mixes and pressurizes oil and water from the oil tank and water tank through the inflow control device at the above ratio. The oil-water mixed fuel fed to the pump and pumped from the mixed pressure pump is injected from the fuel injection nozzle and burned. The fuel injection nozzle is configured to send air by a negative pressure generated when fuel is injected.

On the other hand, the latter device (combustion burner for water emulsion fuel and all types of oil) has a plurality of inclined air slits on the inner periphery, and a swirling external mixed spray with a structure in which a straight fuel feed pipe is arranged in the center. A combustion nozzle is provided.

  Japanese Patent Laying-Open No. 2005-201615   JP 2003-247703 A

However, in the former apparatus, it is difficult to sufficiently mix fuel and air, and it is difficult to ensure stable combustion because of the structure in which air is fed by the negative pressure generated when fuel is injected. . On the other hand, in the latter device, although it is possible to stabilize combustion by a high-speed swirling airflow, high-pressure air is injected from the outer periphery of a plurality of inclined slits arranged on the circumference to generate a swirling airflow. Due to the structure, the structure is inevitably complicated, and the manufacturing cost tends to increase.

The inventor of the present application prototyped various burners and conducted a combustion test. As a result, when the oil / water mixed fuel was injected from the injection nozzle and the air was simply blown, the combustion became intermittent and stable combustion was not obtained. However, the present inventors have found that stable combustion can be secured with an extremely simple structure by rotating the impeller with the blowing pressure to cause a swirling airflow, and the present invention has been completed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an oil-water mixed combustion apparatus capable of generating a swirling airflow with a simple structure and ensuring stable combustion.

In order to achieve the above object, the present invention includes an agitation tank that contains oil and water supplied at a predetermined ratio from an oil tank and a water tank and is agitated and mixed by an agitator, and an oil-water mixed fuel is aspirated from the agitation tank. And a burner that injects the oil / water mixed fuel supplied from the pressure pump and generates a swirling airflow by blowing air and burns the burner, the burner cylinder A blower introduction path that introduces along the axial direction the blown air that is provided with a reduced diameter in the inner part of the burner cylinder and that is supplied from the blower, and a fuel injection disposed in the axial center of the blower introduction path a nozzle, possess an impeller for generating a rotatably provided feed swirling airflow rotated by wind pressure on the upstream side axial line of the fuel injection nozzle, said burner tube body to form a cylindrical front end is opened Formation The blower introduction path having a cylindrical diameter smaller than the diameter of the burner cylinder is connected to the inner part of the inner part through an inclined part gradually reduced in diameter in a funnel shape. The fuel introduction pipe is provided in a state where the fuel introduction pipe is inserted along the center, the fuel injection nozzle for injecting the oil-water mixed fuel in a mist form is provided at the tip of the fuel introduction pipe, and the impeller is disposed on the fuel introduction pipe. It is provided so that it can rotate freely .

It is preferable that a plurality of the impellers are provided on the fuel introduction pipe at appropriate intervals . It is preferable that a strainer having a wire mesh for removing dust is provided in a pipe line leading from the oil tank and the water tank to the stirring tank and a pipe line leading from the stirring tank to the pressure pump.

According to the present invention, the fuel injection nozzle is disposed in the axial center portion of the air introduction path that introduces the air blown from the blower cylinder that is provided with a reduced diameter in the inner part of the burner cylinder and is supplied along the axial direction. An impeller that generates a swirling airflow by rotating with a blowing pressure on the upstream axial center line of the fuel injection nozzle is rotatably provided, so that a swirling airflow is generated with a simple structure to ensure stable combustion. Can do.

The best mode for carrying out the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an explanatory view schematically showing the configuration of an oil-water mixed combustion apparatus according to an embodiment of the present invention.

As shown in FIG. 1, an oil-water mixing and combustion apparatus 1 includes an agitation tank 5 that contains oil and water supplied at a predetermined ratio from an oil tank 2 and a water tank 3 and is agitated and mixed by an agitator 4, and the agitation tank A pressure pump 7 for sucking the oil / water mixed fuel 6 from 5 and supplying it at a predetermined pressure, and a burner for injecting the oil / water mixed fuel 6 supplied from the pressure pump 7 and generating a swirling airflow by air blowing to burn 8 and.

The oil stored in the oil tank 2 is, for example, heavy oil, light oil, kerosene or the like. The water stored in the water tank 3 is, for example, tap water, rain water, river water, or the like. On-off valves 10a and 10b and flow rate control valves 11a and 11b are respectively provided in the pipelines 9a and 9b leading from the oil tank 2 and the water tank 3 to the stirring tank 5, and the oil and water are supplied at a predetermined ratio (volume ratio), for example 1 to 1 to 1 to 8 can be supplied to the stirring tank 5.

The oil / water in the agitation tank 5 is agitated by the agitator 4 at a predetermined rotational speed, for example, 50 to 1500 rpm so as to maintain a milky white state at all times without being separated. The pipes 9a and 9b leading from the oil tank 2 and the water tank 3 to the stirring tank 5, preferably a merging pipe section 9c where both pipes join together, and a pipe 8 leading from the stirring tank 5 to the pressure pump 7 include dust. It is preferable that strainers 12a and 12b each having a wire net for removing water are provided. In this case, the wire mesh is preferably 50 mesh to 200 mesh.

The pressure pump 7 is, for example, a high pressure plunger pump. The pressure pump 7 is rotationally driven by an electric motor (for example, a geared motor) 13. The rotation speed of the electric motor 13 is, for example, about 300 to 600 rpm, and the output of the pressure pump 7 is, for example, a pressure of about 0 to 50 MPa .

The burner 8 includes a burner cylinder 8a, a blower introduction path 14 that is provided in the inner part of the burner cylinder 8a with a reduced diameter and introduces blown air supplied from the blower 17 along the axial direction, and the blower A fuel injection nozzle 15 disposed in the axial center portion of the introduction path 14 and a rear side of the fuel injection nozzle 15, that is, rotatably provided on the upstream axial center line, and is rotated by the blowing pressure from the blower 17 to generate a swirling airflow. And an impeller 16 to be generated. The burner cylinder 8a is formed in a cylindrical shape with an open front end, and an inclined portion 18 in which a cylindrical air introduction passage 14 having a diameter smaller than the diameter of the burner cylinder 8a is gradually reduced in a funnel shape at the back thereof. Connected through. The rear end portion (left end in FIG. 1) of the air introduction path 14 is closed.

A fuel introduction pipe 19 is inserted into the air introduction path 14 from its rear end along the axis thereof, and a projecting port of the pressure pump 7 is provided at the rear end of the fuel introduction pipe 19. It is connected via a fuel pressure feed pipe 20. The fuel injection nozzle 15 for injecting the oil / water mixed fuel in the form of a mist is attached to the tip of the fuel introduction pipe 19. For example, a copper high-pressure pipe having a diameter of 8 mm is preferable as the fuel pressure-feed pipe 20.

A blower (blower) 17 is connected to the rear end portion of the blower introduction path 14 via a blower pipe (duct) 21, and passes through the blower introduction path 14 from the rear end portion of the blower introduction path 14. Air with a flow rate and wind pressure is introduced. In order to effectively generate a swirling airflow with a simple structure using this wind pressure, the impeller 16 is arranged around the axis of the fuel introduction pipe 19 on the upstream axis of the fuel injection nozzle 15. It is rotatably mounted. The impeller 16 is an axial flow type, and is formed in a screw shape or a propeller shape.

It is preferable that a plurality of, for example, three impellers 16 are provided on the upstream axial center line of the fuel injection nozzle 15, that is, on the fuel introduction pipe 19 at an appropriate interval in order to generate a strong swirling airflow. In this case, it is preferable that the impeller 16 is rotatably mounted around the axis of the fuel introduction pipe 19 via a bearing. Moreover, it is preferable that the angle of attack of the blades of the plurality of impellers 16 is increased in order to increase the rotational speed in a stepwise manner toward the downstream side. An ignition burner for igniting (igniting) a swirling airflow containing fuel in the burner cylinder 8a is attached to the burner cylinder 8a.

The rotation of the impeller 16 generates a swirling airflow that travels forward (downstream) while turning along the inner periphery of the air introduction path 14, and is arranged at the axial center near the outlet of the air introduction path 14. A tornado-like swirling airflow is formed from the inclined portion 18 along the inner periphery of the burner cylinder 8a while entraining the fuel injected from the fuel injection nozzle 15, and the swirling airflow containing fuel is generated in the burner cylinder 8a. It is ignited and burned, and the flame is jetted forward (downstream) outside the burner cylinder 8a while turning. The burner cylinder 8a is rapidly heated to high temperature by ignition of the swirling airflow containing fuel, and the gasification of the fuel is promoted at this high temperature, and the stable combustion of the continuous flame combined with the swirling airflow is ensured. can do.

According to the oil / water mixing and combustion apparatus 1 having the above-described configuration, the agitation tank 5 that contains oil and water supplied at a predetermined ratio from the oil tank 2 and the water tank 3 and is agitated and mixed by the agitator 4, and the agitation tank A pressure pump 7 that sucks oil-water mixed fuel from 5 and supplies it at a predetermined pressure, and a burner 8 that injects oil-water mixed fuel 6 supplied from the pressure pump 7 and generates a swirling airflow by air blowing to burn it. The burner 8 is provided with a burner cylinder 8a and a blower introduction path 14 for introducing along the axial direction the blown air supplied from the blower 17 with a reduced diameter at the back of the burner cylinder 8a. And a fuel injection nozzle 15 disposed at the axial center of the air introduction passage 14, and a swirling airflow that is rotated on the upstream axial center line of the fuel injection nozzle 15 and rotated by the air pressure from the blower 17. Because it has an impeller 16 for generating, it is possible to ensure stable combustion by generating a swirling airflow in a simple structure.

In particular, since a plurality of the impellers 16 are provided on the upstream axial center line of the fuel injection nozzle 15, the swirling airflow can be accelerated and stable and strong combustion can be obtained. In the pipe line 9a, 9b or 9c leading from the oil tank 2 and the water tank 3 to the stirring tank 5, and in the pipe line 8 leading from the stirring tank 5 to the pressure pump 7, a strainer 12a having a wire mesh for removing dust, Since 12b is provided, it is possible to remove dust contained in water and oil, to prevent separation of oil water from the oil-water mixed fuel, and to contribute to stable combustion.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above-described embodiments, and various design changes and the like can be made without departing from the scope of the present invention. is there.

It is explanatory drawing which shows schematically the structure of the oil-water mixing combustion apparatus which is embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil-water mixing combustion apparatus 2 Oil tank 3 Water tank 4 Stirrer 5 Stirrer tank 6 Oil-water mixed fuel 7 Pressure pump 8 Burner 12a, 12b Strainer 14 Blast introduction path 15 Fuel injection nozzle 16 Impeller 17 Blower

Claims (3)

An agitation tank that contains oil and water supplied at a predetermined ratio from an oil tank and a water tank and is agitated and mixed by a stirrer; a pressure pump that sucks the oil-water mixed fuel from the agitation tank and supplies it at a predetermined pressure; And a burner that injects the oil-water mixed fuel supplied from the pressure pump and generates a swirling airflow by air blowing to burn the burner, and the burner has a reduced diameter at the back of the burner cylinder A blower introduction path for introducing the blown air supplied from the blower along the axial direction, a fuel injection nozzle disposed at the axial center of the blower introduction path, and an upstream axis of the fuel injection nozzle possess an impeller that generates rotational to whirling airflow by wind pressure feeding rotatably provided on a line, the burner tube body is formed in a cylindrical shape that the front end is open, the diameter of the burner tube body to the inner portion Yo The small-diameter cylindrical air introduction passage is connected via an inclined portion gradually reduced in diameter in a funnel shape, and a fuel introduction pipe is inserted into the air introduction passage from its rear end along its axis. The fuel injection nozzle for injecting the oil-water mixed fuel in a mist form is provided at the tip of the fuel introduction pipe, and the impeller is rotatably provided on the fuel introduction pipe. Oil-water mixed combustion device. The oil-water mixed combustion apparatus according to claim 1, wherein a plurality of the impellers are provided on the fuel introduction pipe at appropriate intervals . 2. A strainer having a wire mesh for removing dust is provided in a pipe line leading from the oil tank and the water tank to the stirring tank and a pipe line leading from the stirring tank to the pressure pump. The oil-water mixed combustion apparatus described.