JP3161981B2 - Nozzle for combustion of waste oil mixed type liquid fuel and combustion method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle for combusting waste oil mixed type liquid fuel and a combustion method, and more particularly, to a hydraulic spray burner used for a boiler and a combustion furnace.
The present invention relates to a waste oil mixed type liquid fuel combustion nozzle and a combustion method for effectively utilizing waste oil.

By using the present invention, self-discharged waste oil, that is, tempura oil, salad oil, in a combustion furnace equipped with a hydraulic spray burner, or in a business facility, hospital, hotel or the like having combustion equipment such as a boiler. Edible oil, waste lubricating oil, and the like, and the like, can be mixed with a conventionally used fuel and self-burned. This leads to waste oil recycling and contributes to energy saving technology. As base oil for mixing and burning waste oil, generally, petroleum fuels such as kerosene, heavy fuel oil A and heavy fuel oil C are often used, but there is no particular limitation as long as the fuel is a liquid fuel.

The disposal of waste oil such as edible oil and lubricating oil is generally paid by the discharger and entrusted to a specialized waste oil treatment company, and the specialized waste oil treatment company performs incineration and the like. In addition, in general households, waste cooking oil is solidified using a solidifying agent such as “solidifying temple (registered trademark)” or “oil solidifying (registered trademark)”, and the waste is treated by a local government. , Etc. are the current status.

[0004] However, as apparent from the specialized magazine "Equipment and Management" No. 6/1996, the combustion treatment of edible waste oil for hotels and the like, which are large consumers of edible oil, has been studied for the combustion treatment method using a private boiler. ing. In these methods, conventionally used fuel oil and waste oil are previously mixed in a fuel tank or before a burner is supplied by a pump or a mixing device, and the mixed fuel oil is supplied to a burner.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to burn and treat waste oil as a part of fuel oil in a business facility or facility having a combustion facility such as a combustion furnace or a boiler using a hydraulic spray burner. It is an object of the present invention to enable a cycle as an effective use of waste oil without leaving it to a third party, and to save processing costs and contribute to energy saving by using a facility that performs the processing.

[0006] The above-described method of supplying fuel oil premixed with waste oil to a burner and burning it requires a stirrer or the like as a means for mixing the liquid fuel and the waste oil, and the property that the waste oil is well mixed with the fuel oil. That is, compatibility is required. For example, there is a concern that rust or damage to equipment may occur in the supply path due to mixing of water, salt, or the like. Therefore, it is necessary to provide secondary defense measures for stable operation. This leads to complication of facilities and a rise in facility costs.

The present invention enables self-combustion treatment in waste oil discharged, especially in hotels and hospitals discharged in large quantities, and supplies waste oil from another system without affecting the function of the original boiler. Another object of the present invention is to provide a technique for solving these problems by mixing immediately before combustion. That is, an object of the present invention is to provide a combustion nozzle and a combustion method for mixing fuel oil and waste oil for the purpose of effectively utilizing waste oil.

[0008]

Means for Solving the Problems The technical problems described above are:
In a hydraulic spray burner used for a boiler, a combustion furnace, or the like, a swirl chamber is provided in front of a single nozzle tip spray port, and a liquid fuel is provided on a front surface of an umbrella-shaped nozzle disk portion. A plurality of swirling grooves for an oil flow path are provided to form a fuel oil flow path, and a fine hole communicating from the inside of the nozzle disk portion to the surface thereof is provided in an inclined state to form a waste oil injection hole. A waste oil mixing type liquid fuel combustion nozzle, characterized in that both are swirled by the swirling force of the fuel oil and the waste oil,

2. The waste oil mixed type liquid fuel combustion as described in 1 above, wherein an outlet of the waste oil injection hole is provided at a tip end of the nozzle disk portion, and the waste oil is directly injected into the swirl chamber. Nozzle,

3. The waste oil mixing type liquid fuel combustion nozzle according to the above item 1, wherein the outlet of the waste oil injection hole is provided in the waste oil swirl groove of the tip inclined portion of the nozzle disk portion.

[0011]

4. In a method of burning a hydraulic spray burner used in a boiler, a combustion furnace or the like, a swirl chamber is provided in front of a single nozzle tip spray port, and stirring is performed in a nozzle disk portion immediately before spraying. By providing a liquid fuel oil flow path including a liquid fuel oil swirl groove that generates a force, and by providing a waste oil injection mechanism including a waste oil swirl groove, a stirring ability latent by the liquid fuel oil flow, that is, A hydraulic spray type wherein fuel oil and waste oil are efficiently mixed using the high-speed flow generated in the swirl groove and the agitation force of the fuel oil generated in the swirl chamber and the agitation force of the waste oil, and immediately combusted. Burner burning method,

In the above 4, the fuel oil and the waste oil are efficiently atomized and mixed by the agitation force of the fuel oil due to the vortex generated in the swirl chamber due to the high-speed flow generated in the swirl groove and the dispersibility due to the swirl force of the injected waste oil. And a combustion method for a hydraulic spray burner.

The inventor of the present invention provided a liquid fuel oil by providing a waste oil injection mechanism in a hydraulic spray-type burner that generates a stirring force in a nozzle disk portion immediately before spraying without largely changing an existing burner mechanism. By effectively mixing the fuel oil and the waste oil using the stirring ability latent by the flow, that is, the high-speed flow generated in the swirl groove and the stirring force of the vortex generated in the swirl chamber and the stirring force of the waste oil, by immediately burning, This has led to the completion of the present invention in which waste oil is effectively used.

According to the present invention, in an office or facility that discharges a large amount of waste oil such as edible oil or lubricating oil, the existing burner mechanism can be greatly increased in order to enable self-treatment using a combustion furnace or a boiler owned by the company. This is a technology that has been achieved as a result of intensive research on a technology for processing without changing or affecting existing equipment. In particular, it becomes possible to apply a high pressure to the waste oil side to give a stirring force, and it is possible to obtain more effective combustion according to the waste oil to be treated.

In the waste oil mixing type liquid fuel combustion nozzle according to the present invention, in a hydraulic spray burner, fuel oil and waste oil are merged in a swirl chamber inside a nozzle tip immediately before spraying, and the swirl chamber is rotated by a high-speed flow generated in a swirl groove. The fuel oil and the waste oil are efficiently atomized, mixed and burned by the agitation force of the fuel oil due to the violent vortex generated and the dispersibility by the swirling force of the injected waste oil.

Conventionally, in a hydraulic spray burner, fuel oil fed by pressure is increased in flow velocity by several swirl grooves (fuel oil supply passages) provided in a nozzle disk portion of a nozzle tip portion, and enters the swirl groove, and the pressure is increased. As a result, fuel oil having a swirling force is ejected from the nozzle tip port to be atomized and burned. According to the present invention, a swirl force existing in the swirl chamber is provided by providing an injection mechanism in which the waste oil itself is easily dispersed in the nozzle disk portion facing the swirl chamber, that is, by providing a waste oil injection hole that also has a swirl force on the waste oil side. A mixture of fuel oil and waste oil is efficiently produced by utilizing turbulence generated from the oil.

In the present invention, the number of oblique holes for injecting waste oil or swirl grooves for feeding waste oil provided in the nozzle disk portion, or the size of the waste oil injecting hole, is such that a predetermined amount of waste oil is 1. 0 kg / cm ² or more, preferably 2.0 kg
It is sufficient that the injection can be performed at a pressure higher than / cm ² or more, and it is determined by the injection ratio of the waste oil with respect to the fuel oil amount.

As described above, according to the present invention, in the hydraulic spray burner, the waste oil injected into the nozzle disk portion of the swirl chamber at the tip of the burner and the nozzle disk portion of the nozzle tip is easily dispersed in the fuel oil. Injecting oil into the swirling chamber by providing an inlet with a slant hole flow path, or a waste oil swirl groove, to stir and mix efficiently with the turbulent flow present there, A waste oil mixed type liquid fuel combustion nozzle characterized in that a fuel oil / waste oil mixed fuel having a more uniform particle diameter is produced and burned immediately after production.

Examples of the waste oil used in the present invention include soybean oil, rapeseed oil, cottonseed oil, corn oil, rice bran oil,
Waste lubricating oils such as coconut oil, palm oil, sesame oil, sunflower oil, linseed oil, safflower oil, or mixed oils thereof, engine oil, gear oil, turbine oil, hydraulic oil, machine oil, etc. And the like. The mixing ratio of the waste oil to the fuel used in the present invention varies depending on the types of the waste oil and the fuel, but is suitably 1 to 60 parts by weight, preferably about 1 to 40 parts by weight, per 100 parts by weight of the fuel.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the accompanying drawings. Embodiment 1 FIGS. 1, 2, and 3 show a first embodiment of a waste oil mixed type liquid fuel combustion nozzle according to the present invention, in which two waste oil injection holes are provided from a nozzle disk portion to a swirl chamber. It is the schematic of what was provided. The fuel oil F pressurized by the injection pump flows along the outside of the fixture 1, enters the fuel oil reservoir 3, passes through the swirl groove 4, and is guided to the swirl chamber 5. On the other hand, the waste oil O passes through a waste oil passage 7 provided inside the nozzle disk portion 2, passes through a fine hole 8 which is a waste oil injection hole directed in a direction close to a tangent to the annular line 5A forming the swirl chamber 5, Enter the turning room 5. The waste oil O entering the swirl chamber 5 is accelerated by the swirl groove 4 and merges with the fuel oil F that is swirling in the swirl chamber 5, and is agitated by the swirl flow of the fuel oil F and dispersed by the swirl of the injected waste oil O itself. Vigorous stirring and mixing. The fuel in which the fuel oil F and the waste oil O are uniformly dispersed is immediately supplied to the nozzle tip spray port 1 of the nozzle tip 6.
It is sprayed from 0 and burned.

Embodiment 2 FIGS. 4, 5 and 6 show a second embodiment of a waste oil mixed type liquid fuel combustion nozzle according to the present invention, which is adjacent to a fuel oil swirl groove of a nozzle disk portion. FIG. 4 is a schematic view of a configuration in which two swirl grooves as waste oil flow paths are provided. The fuel oil F pressurized by the injection pump flows along the outside of the fixture 1, enters the fuel oil reservoir 3, passes through the swirl groove 4, and is guided to the swirl chamber 5.
On the other hand, the waste oil O passes through the waste oil passage 7 provided inside the nozzle disk portion 2 and enters the swirl chamber 5 from the waste oil swirl groove 9. The waste oil O entering the swirl chamber 5 is accelerated by the swirl groove 4, merges with the fuel oil F that is swirling in the swirl chamber 5, and is agitated by the swirl flow of the fuel oil F and dispersed by the swirl of the injected waste oil O itself. Vigorous stirring and mixing. Then, the fuel in which the fuel oil F and the waste oil O are uniformly dispersed is immediately sprayed from the nozzle tip spray port 10 of the nozzle tip 6 and burned.

In the embodiment of the present invention, two waste oil injection holes 8 are provided. However, the present invention is not limited to this, and may be one or three or more.

FIG. 7 shows an example of a combustion facility equipped with a waste oil mixed type liquid fuel combustion nozzle. 7, 11 is a burner nozzle, 12 is a check valve, 13 is a solenoid valve, 14 is a fuel oil injection pump, 15 is a waste oil supply pump,
16 is a flow meter, 17 is a filter, 18 is a fuel oil tank, and 19 is a waste oil tank.

[0025]

According to the present invention, it is possible to provide a combustion nozzle and a combustion method for mixing fuel oil and waste oil for the purpose of effectively utilizing waste oil.

Further, according to the present invention, it is not necessary to incorporate a device such as a stirrer into the mixing of the fuel oil and the waste oil.
A mixture of fuel oil and waste oil having a uniform particle size can be efficiently produced.

Further, the mixing of the fuel oil and the waste oil is performed inside the nozzle tip immediately before spraying, that is, in a portion very close to the tip of the nozzle tip which immediately leads to combustion after mixing, so that the stability of the mixture is required. do not do. Therefore, there is no need to use a surfactant such as an emulsifier. Since it is sprayed instantly after mixing, the waste oil is supplied to the combustion site in a state of being uniformly dispersed in the fuel oil, and there is no need to use a surfactant.

Furthermore, since there is no driving part such as a rotor for mixing the fuel oil and the waste oil, the durability is excellent.

Further, according to the present invention, the waste oil to be injected is also provided with a stirring ability (the larger the differential pressure between the waste oil injection pressure and the swirl chamber, the greater the stirring power). The mixed particle diameter of the fuel oil and the waste oil is finer and uniform, and stable combustion can be obtained. Also, when the injection oil of the nozzle tip and the waste oil injection port are at the same position and the waste oil is injected with the waste oil injection pressure and the differential pressure of the swirl chamber being large, the fuel oil and the waste oil are sprayed without being mixed sufficiently, However, according to the present invention, the spray port of the nozzle tip portion and the waste oil injection port are located at the same position. There is no problem even if the waste oil is injected with a large differential pressure because there is no such problem. Rather, as described above, when the waste oil is injected under a condition with a large differential pressure, the mixing state of the fuel oil and the waste oil is improved and the stability is improved. Contributes to combustion.

Further, since the mixing of the fuel oil and the waste oil is performed inside the nozzle tip immediately before spraying, that is, at a portion very close to the tip of the nozzle tip which leads to immediate combustion after mixing, the water content which is a problem of the prior art is considered. There is no need to worry about rust or damage to equipment due to mixing of impurities such as water and salt. Also,
Since the conventional fuel supply system and the waste oil supply system are separate systems,
It is easy to respond to the type of waste oil in the device.

The present invention is a technology that can be used with existing combustion equipment, and has great economic advantages. That is, the consumption of the fuel oil conventionally used is saved by the combustion of the waste oil.
In addition, since waste oil is processed in-house, it is not outsourced, and consignment costs are reduced. Furthermore, from a social point of view, it leads to recycling of waste oil and can contribute to energy saving.

[Brief description of the drawings]

FIG. 1 is a schematic view of a first embodiment of a waste oil mixed type liquid fuel combustion nozzle according to the present invention, in which an oblique hole is provided from a nozzle disk toward a swirl chamber.

FIG. 2 is a front view of the nozzle disk unit of FIG.

FIG. 3 is a detailed view of a nozzle disk unit of FIG. 1;

FIG. 4 is a schematic view of a second embodiment of a waste oil mixed type liquid fuel combustion nozzle according to the present invention, in which a waste oil swirl groove is provided adjacent to a fuel oil swirl groove of a nozzle disk portion. is there.

FIG. 5 is a front view of the nozzle disk unit of FIG. 4;

FIG. 6 is a detailed view of the nozzle disk unit of FIG.

FIG. 7 is an example of a combustion facility provided with a waste oil mixed type liquid fuel combustion nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixture 2 Nozzle disk part 3 Fuel oil reservoir 4 Swirl groove 5 Swirl chamber 5A annular line 6 Nozzle tip 7 Waste oil passage 8 Waste oil injection hole (pore) 9 Swirl groove for waste oil 10 Nozzle tip spray port 11 Burner nozzle 12 Non-return Valve 13 Solenoid valve 14 Fuel oil injection pump 15 Waste oil supply pump 16 Flow meter 17 Filter 18 Fuel oil tank 19 Waste oil tank F Fuel oil O Waste oil

Claims (5)

(57) [Claims] In a hydraulic spray type burner used for a boiler, a combustion furnace, etc., a swirl chamber is provided in front of a single nozzle tip spray port, and a tip side of an umbrella-shaped nozzle disk portion. A plurality of swirling grooves for a liquid fuel oil flow path are provided on the surface of the nozzle disk to form a fuel oil flow path, and a fine hole communicating from the inside of the nozzle disk portion to the surface is provided as an inclined oil injection hole. A waste oil mixing type liquid fuel combustion nozzle, wherein the fuel oil and the waste oil swirling in the swirling chamber are agitated by a swirling force of the waste oil and the waste oil. 2. The waste oil mixed type liquid fuel according to claim 1, wherein an outlet of the waste oil injection hole is provided at a tip end of the nozzle disk portion, and the waste oil is directly injected into the swirl chamber. Combustion nozzle. 3. The waste oil mixed type liquid fuel combustion nozzle according to claim 1, wherein an outlet of the waste oil injection hole is provided in a waste oil swirl groove of a tip inclined portion of the nozzle disk portion. 4. A combustion method for a hydraulic spray burner used in a boiler, a combustion furnace or the like, wherein a swirl chamber is provided in front of a single nozzle tip spray port, and stirring is performed in a nozzle disk portion immediately before spraying. A liquid fuel oil flow path including a liquid fuel oil swirl groove that generates a force is provided,
By providing the waste oil injection mechanism including the waste oil swirl groove, the stirring ability latent by the liquid fuel oil flow, that is, the high-speed flow generated in the swirl groove and the fuel oil stirring force generated in the swirl chamber and the waste oil A method for burning a hydraulic spray burner, wherein fuel oil and waste oil are efficiently mixed by utilizing a stirring force and immediately burned. 5. The fuel oil and the waste oil are efficiently atomized and mixed by the agitation force of the fuel oil due to the swirling flow generated in the swirling chamber by the high speed flow generated in the swirling groove and the dispersibility by the swirling force of the injected waste oil. And burning it. A method for burning a hydraulic spray burner.