JPH10332126A - Llc combustion treatment method, and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the stably perfect combustion in a waste oil combustion equipment, and to enable the perfect combustion of a coolant for waste, by making use of the combustion heat in the perfect combustion of the waste oil combustion equipment to form the high-temperature combustible atmosphere. SOLUTION: A combustion equipment for a coolant for waste (waste LLC) comprises a combustion chamber 10, a waste oil supply part 13, a waste LLC supply part 15, and a combustion air supply part 25. The combustion chamber 10 comprises a lower primary combustion space 10a and an upper secondary combustion chamber 10b, the waste oil supply part 13 comprises a waste oil tank 11 and a waste oil heating float 12, the combustion air supply part 25 comprises a lower air feed part 25a and an upper air feed part 25b, and the waste LLC supply part 15 comprises a waste LLC tank 16, a waste LLC heating part 17, a compressed air 18, an injector 20 and an atomizing nozzle 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for burning waste oil,
Using it as a heat source, from a cooling system such as a heating device or a prime mover,
The present invention relates to an LLC combustion treatment method and a treatment apparatus which enable complete combustion of waste coolant (hereinafter referred to as waste LLC) containing ethylene glycol as a main component.

[0002]

2. Description of the Related Art From the viewpoint of environmental measures, safe and efficient disposal methods of waste oils, which are industrial wastes, have been strongly demanded. Separation and purification treatment, incineration treatment and the like are appropriately selected and used.

For example, a schematic diagram of FIG. 3 shows a schematic configuration of a conventional waste oil combustion device. As shown in the figure, a combustion chamber 52 having a cylindrical furnace wall 51 is provided, an exhaust pipe 53 is provided above the combustion chamber, and a plurality of compressed air ejection nozzles 54 are provided on a side wall of the combustion chamber 52. The combustion chamber 52 has an upwardly directed fuel injection burner 55 at the bottom.
A reservoir 56 for the unburned waste oil that has flowed down is provided on the outer periphery thereof.

On the other hand, the waste oil is supplied from a waste oil tank 60 provided outside by a pump 59 to the inner wall of the exhaust pipe 53 from the top at the upper end thereof, flows down while being heated, and is sprayed by compressed air ejected from the ejection nozzle 54. Atomized,
The flame is rapidly heated and burned by the flame injected from the injection burner 55 provided at the bottom. In the case of the above configuration, the waste oil flows down while being heated inside the furnace wall 51 and reaches the ejection nozzle 54, so that the waste oil is concentrated and becomes fine particles that are easy to ignite, enabling efficient combustion. Further, since the unburned waste oil is returned to the waste oil tank from the reservoir 56, the unburned waste oil can be sent again to the combustion chamber, so that the waste oil can be reliably treated.

In the above configuration, there is a problem that the flow rate of the furnace wall is influenced by the viscosity of the waste oil and the processing speed is eventually affected, and the entire furnace wall of the combustion chamber is cooled by heat exchange with the waste oil. However, the temperature in the combustion chamber is lowered, so that complete combustion of waste oil becomes impossible, and a problem that incompletely combusted substances are discharged together with exhaust gas is inevitable. In general, waste oils that require treatment include engine oil, gear oil, spindle oil, machine oil, refrigeration oil, water-insoluble oil, hydraulic oil, quenching oil, cutting oil, kerosene, light oil, A heavy oil, dynamo oil, etc. And the viscosity range is wide and cannot be determined unconditionally.

[0006] Despite the fact that ethylene glycol, which is the main component, has a boiling point of 197.6 ° C and a high ignition temperature, LLC containing a large amount of water has a problem that the ignition temperature is higher and combustion at room temperature is difficult. Built-in.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. First, the present invention has been made to solve the above-mentioned problems such as incomplete combustion in a waste oil combustion device, thereby enabling stable combustion.
It is an object of the present invention to provide an LLC combustion processing method and a processing apparatus for forming an atmosphere capable of high-temperature combustion by using combustion heat of a waste oil combustion device that stably burns and enabling complete combustion of waste LLC.

Incidentally, as described above, in order to obtain a stable combustion atmosphere by complete combustion of a wide variety of waste oils, it is necessary to heat the waste oil at an appropriate temperature, and to heat waste LLC having a high ignition temperature. Need. On the other hand, the atmosphere in which the waste LLC can be burned at a high temperature requires a heat source and a heat transfer mechanism necessary for the particulate LLC to be vaporized by the atmosphere, and also required for combustion based on thermal oxidation of the vaporized waste LLC vapor. An abundant oxygen supply mechanism is needed.

That is, in the present invention, high heat energy obtained by complete combustion of waste oil is used as a heat source of the high-temperature combustible atmosphere, and the heat transfer mechanism forms fine particles of the waste LLC and removes the formed fine particles. This is made possible by efficient contact caused by high-speed spraying to a hot swirling oxidizing gas stream. The supply mechanism of abundant oxygen necessary for thermal oxidation in a high-temperature combustible atmosphere is made possible by additional air blowing to the upper secondary combustion space for waste LLC combustion by the air blowing means.

[0010]

SUMMARY OF THE INVENTION Accordingly, an LLC according to the present invention is provided.
In the combustion treatment method, fresh air is added to the high-temperature swirling airflow created in the primary combustion space in the secondary combustion space of the waste oil combustion device to form a combustible atmosphere composed of the high-temperature swirling oxidizing airflow, and the atmosphere is heated to an appropriate temperature. The waste coolant was sprayed by high-pressure air or a spraying device via a pumping device to form a spray film, thereby enabling contact with the high-temperature swirling oxidizing gas stream and complete combustion based on evaporation and thermal oxidation of the coolant. , Characterized in that.

Further, the spraying means according to the first aspect of the present invention is characterized in that a plurality of radial spray films for directly cutting a high-temperature swirling oxidizing gas flow are formed.

Further, the LLC combustion treatment apparatus of the present invention is a waste oil combustion apparatus comprising a waste oil supply means, a combustion chamber, a combustion air blowing means, and a heating section for a waste coolant, and an inflow of the heating coolant. And a spray nozzle provided above the combustion chamber. The waste oil supply means is provided with a waste oil heating unit, and the combustion chamber is a lower primary combustion space for waste oil combustion. And an upper secondary combustion space for burning waste coolant, and the blowing means is configured to branch and supply to the upper and lower combustion spaces.

Further, the blower means according to the present invention is characterized in that a multistage nozzle for forming a swirling airflow is provided in which the nozzle blowing direction is eccentric with respect to the axis of the combustion chamber.

Further, the spray nozzle according to the third aspect is characterized in that it is constituted by a plurality of branch nozzles from the center.

[0015]

Therefore, according to the LLC combustion treatment method of the present invention, fresh air is additionally blown to the high-temperature combustion air obtained in the primary combustion space of the waste oil combustion device and introduced into the upper secondary combustion space, to thereby perform the primary combustion. A high-temperature swirling oxidizing airflow is formed by supplying abundant oxygen to the high-temperature combustion air formed in the combustion space, thereby forming a high-temperature combustible atmosphere. The waste LLC, which is a waste coolant that has been heated to a suitable temperature in advance, is supplied to the waste LLC with an appropriate amount of the waste L through an injector or a pressure feeding device operated by high-pressure air.
If the LC is sucked into fine particles and sprayed at a high speed from the spray nozzle into the high-temperature combustible atmosphere, the sprayed fine particles of the waste LLC are deeply dispersed and mixed into the high-temperature atmosphere and vaporized by efficient contact. Further, it combines with the high-temperature oxygen abundantly contained in the atmosphere to enable complete combustion based on thermal oxidation.

In this manner, the combustion energy obtained by the combustion of the waste oil is effectively used to form a high-temperature combustible atmosphere for the combustion of the waste LLC, and the waste LLC can be completely burned. In addition, since the spraying through the spray nozzle is directed toward the high-temperature swirling oxidizing gas stream, the generation of vaporized fine particles and the contact with the oxygen gas can be efficiently performed, and the complete combustion is promoted. .

According to the second aspect of the present invention, it is possible to form a direct spray film against a high-temperature swirling oxidizing gas stream in a completely combustible atmosphere formed in the secondary combustion space. The fine particles of LLC can come into contact with high contact efficiency, and thus can promote the vaporization of the fine particles and complete combustion based on thermal oxidation.

Further, according to the LLC combustion processing apparatus of the present invention, a waste LLC combustion device provided with a waste oil supply means, a combustion chamber, and a combustion air blowing means is provided with a waste LLC heating section and the heated waste LL.
It is provided with an injector including a compressed air source for injection capable of sucking C and performing high-speed spraying into fine particles, a pumping device, and a spray nozzle. In addition, the same effect as described above is produced by using the pressure feeding device. By the heating unit, the waste LLC is heated to a suitable temperature in advance and brought into a state close to ignitable. The heated waste LLC is suctioned by an injector under an appropriate amount of air under appropriate air pressure, and heated high-speed spray-shaped fine particles and the upper part of the combustion chamber by a non-spray nozzle. High-speed spray dispersion is performed in the secondary combustion space.

The waste oil supply means is provided with a waste oil heating section to stably ignite and burn various miscellaneous waste oils and to enable complete combustion of the waste oil together with the blowing means to thereby generate high-temperature combustion energy by waste oil combustion. A possible primary combustion space for waste oil combustion can be formed. Also,
As described above, since the combustion chamber is configured to provide the lower primary combustion space for waste oil combustion and the upper secondary combustion space for waste LLC combustion, the high-temperature combustion air formed in the lower primary combustion space rises and rises. It is introduced into the secondary combustion space to form a high-temperature combustible atmosphere. That is, the waste LL is used in a high-temperature combustible atmosphere in the upper secondary combustion space containing the high-temperature combustion energy formed by the combustion of waste oil in the lower primary combustion space.
The dispersed and heated fine particles of C are vaporized and cause thermal oxidation by oxygen newly supplied by the blowing means, so that required combustion can be performed.

According to the fourth aspect of the present invention, since the nozzle blowing direction is eccentric with respect to the axis of the combustion chamber, air containing new oxygen is always swirled in the combustion chamber. It is replenished while forming an airflow, enabling complete combustion in the upper and lower combustion spaces.

Further, according to the configuration of the spray nozzle according to the fifth aspect, a plurality of spray films can be formed on the high-temperature swirling oxidizing air stream for combustion formed by the blowing means according to the fourth aspect, and the waste is sprayed at a high speed from the spray nozzle. It is possible to efficiently contact the high-temperature swirling oxidizing gas stream containing abundant LLC particles and oxygen, and complete combustion based on vaporization of the particles and thermal oxidation can be achieved.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not merely intended to limit the scope of the present invention, but are merely illustrative examples unless otherwise specified. Absent. FIG.
FIG. 1 is a diagram showing a schematic configuration of an LLC combustion processing device of the present invention, and FIG. 2 is a flowchart showing an operation state of FIG.

As shown in FIG. 1, the LLC combustion processing apparatus of the present invention comprises a combustion chamber 10, a waste oil supply unit 13, a waste LLC supply unit 15, and a combustion air supply unit 25. The combustion chamber 10 has a lower primary combustion space 10a for waste oil combustion and a waste LLC.
Composed of an upper secondary combustion space 10b for combustion and an exhaust stack 10c, the high-temperature combustion energy obtained by the waste oil combustion in the lower primary combustion space 10a is used to burn the high-temperature combustion to the upper upper secondary combustion space 10b. A possible space is formed.

The waste oil supply unit 13 is a waste oil tank 11 and a waste oil heating float 12 for heating the waste oil supplied from the tank to a predetermined appropriate temperature to complete ignition and complete combustion of the waste oil.
In combination with the supply of excess combustion air forming an oxidizing flow by a lower blower 25a described later in the lower primary combustion space 10a, complete combustion of waste oil is enabled.
The combustion air supply unit 25 includes a lower air supply unit 25a and an upper air supply unit 25b, and supplies excess combustion air to the lower primary combustion space 10a and the upper waste LLC combustion space 10b, respectively, to form an oxidizing flow in each space. In the upper secondary combustion space, the lower LLC can be ignited to the waste LLC supplied to the upper space by high-temperature combustion air based on complete combustion of waste oil in the lower primary combustion space.

The air blowing direction of the nozzles of the upper and lower blowers 25a and 25b is set eccentrically slightly upward with respect to the axis of the combustion chamber 10, and the air blown by the upper and lower blowers blows the combustion air into the upper and lower combustion spaces 10a and 10b. An upward rising swirling airflow is formed to enable efficient contact between the combustion air and the member to be burned. The high-temperature swirling airflow receives the supply of combustion air containing excess oxygen from the upper blowing section 25b in the upper secondary combustion space described later, forms a high-temperature swirling oxidizing airflow, and is formed in a radially downward direction formed by the spray nozzle 21. The structure of the spray film directly works effectively and enables efficient contact between oxygen and combustibles.

The waste LLC supply unit 15 is provided with the waste LLC tank 1
6, a waste LLC heating unit 17, compressed air 18, an air regulator 19, an injector 20, and a spray nozzle 21. The ignition when burning waste LLC containing ethylene glycol having a high boiling point as a main component and containing a large amount of water. In order to facilitate the above, the waste LLC heating unit 17 receives the supply from the waste LLC tank 16 in advance, heats it to an appropriate temperature in the waste LLC heating unit 17, and turns the heated LLC into fine particles by the suction action of the compressed air 18 through the injector 20. From 21, heated waste LLC fine particles are sprayed at high speed into the upper secondary combustion space 10 b of the combustion chamber 10.

The spray nozzle 21 is connected to the combustion chamber 10.
A plurality of branch nozzles are formed from the axis of the nozzle, and each nozzle is provided with an innumerable downward spray hole to form a downward spray film directly in the downward direction with respect to the high-temperature swirling oxidizing gas flow. The flow of the heated LLC fine particles and the flow of the oxygen of the high-temperature swirling oxidizing gas flow are made orthogonal to each other to form an efficient contact, thereby enabling complete combustion based on vaporization and oxidation of the fine particles.

The LLC shown in FIG. 1 is used in the flowchart shown in FIG.
As shown in the figure, the operation status of the combustion processing apparatus is shown in the case of a waste LLC burning process and a fire extinguishing process of extinguishing by burning the waste LLC. 1) Waste LLC combustion step; At s31, the valve 11a is opened, the waste oil heating float 12 is filled with waste oil from the waste oil tank 11, and the valve 16a is opened to open the waste LLC tank 16.
Further, the waste LLC is filled in the waste LLC heating unit 17. s32
The waste oil heating float 12 and the waste LLC heating unit 17
Power is supplied to the heaters 12a and 17a, and the waste oil and the waste LLC are each heated to an appropriate temperature. In s33, an appropriate amount of kerosene is injected into the combustion chamber 10 and ignited. At s34,
Power is supplied to the blower, and the air volume adjusting valve of the lower blower 25a and the upper blower 25b is fully opened to burn the ignited kerosene. In s35, the oil supply valve 12b of the waste oil heating float 12 is opened, and heated waste oil heated to an appropriate temperature is injected into the lower part of the combustion chamber 10. At s36, the injected heating waste oil is easily ignited by the burning kerosene. At this time, if the ignition is not performed, the supply of the heating waste oil is stopped via s43 and s44, the power supply of the blower is cut off, the flow returns to s33, and the waste oil is ignited again from the kerosene injection ignition step. In addition,
If the ignition occurs, the process proceeds to the next step. At s37, the heating waste oil supply valve is fully opened, the temperature of the waste oil combustion primary combustion space 10a is set to an appropriate temperature in s38, and a high-temperature combustible atmosphere composed of a high-temperature swirling oxidizing gas flow is provided at the upper secondary combustion space 10b. Let it form. In s39, compressed air 18
The air supply valve 18a is opened, and the injector 20 is operated under an appropriate amount control via the air regulator 19,
The waste LLC heated to an appropriate temperature is formed into a fine-grained spray film directly in the high-temperature swirling oxidizing gas stream. At s40, the fine particles are efficiently contacted with high-temperature oxygen, vaporized and oxidized, and the waste LLC is heated to a high temperature and takes a form of lower ignition in which the waste LLC is ignited by the high temperature. In this case, in the case of misfire, the compressed air supply valve 18a is closed through s45 and s43, s
The flow returns to s33 via 44, and the temperature is set again in s38. If the ignition is performed, the process proceeds to the next step. In s41 and s42, the combustion of the waste LLC is started, and the process shifts to a complete combustion process. 2) Fire extinguishing step: In s46, the compressed air supply valve is closed. At s47, the heating waste oil supply valve 12a is closed to stop the supply of the heating waste oil. Stop the waste oil combustion and extinguish the fire. In s48, after confirming the fire extinguishing, the blower is turned off.
F. At s49, the fire extinguishing is terminated.

In the LLC combustion processing apparatus of the present invention,
The combustion heat generated during the combustion treatment of the waste LLC can be used as a boiler heat source. Also, when not burning the waste LLC, it can be used as a waste oil stove.

[0030]

According to the above-mentioned structure of the present invention, since the ethylene glycol containing water as a main component, which has a high boiling point, has a high boiling point, the combustion treatment of the waste LLC, which has conventionally been difficult to burn, can be performed in the waste oil combustion. It is possible to provide a combustion processing method and device capable of performing complete combustion at low cost by using the obtained high-energy heat source.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an LLC combustion processing device of the present invention.

FIG. 2 is a flowchart showing an operation state of FIG.

FIG. 3 is a schematic diagram showing a schematic configuration of a conventional waste oil combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Combustion chamber 10a Lower primary combustion space 10b Upper secondary combustion space 11 Waste oil tank 12 Waste oil heating float 13 Waste oil supply unit 15 Waste LLC supply unit 16 Waste LLC tank 17 Waste LLC heating unit 18 Compressed air 19 Air regulator 20 Injector 21 Spray nozzle 25 Combustion cavity supply section 25a Lower blow section 25b Upper blow section

Claims (5)

[Claims] 1. A high-temperature combustible atmosphere consisting of a high-temperature swirling oxidizing airflow is formed by adding fresh air to a high-temperature swirling airflow created in a primary combustion space in a secondary combustion space of a waste oil combustion device.
The waste coolant, which is heated to the appropriate temperature in the atmosphere, is formed into a spray film by a spraying means through high-pressure air or a pumping device, and is based on contact with the high-temperature swirling oxidizing air flow, and evaporation and thermal oxidation of the coolant. An LLC combustion processing method characterized by enabling complete combustion. 2. The LLC combustion processing method according to claim 1, wherein said spray means forms a plurality of radial spray films for directly cutting a high-temperature swirling oxidizing gas flow. 3. A waste oil combustion device comprising: waste oil supply means, a combustion chamber, and combustion air blowing means, wherein an injector including a waste coolant heating unit, and a compressed air source for injecting the heated coolant. A pumping device, and a spray nozzle provided at an upper portion of the combustion chamber, wherein the waste oil supply means is provided with a waste oil heating section, and the combustion chamber has a lower primary combustion space for waste oil combustion and a coolant for waste combustion. And an upper secondary combustion space, wherein the blowing means is configured to branch and supply the upper and lower combustion spaces. 4. The LLC combustion processing apparatus according to claim 3, wherein said blowing means is provided with a multistage nozzle for forming a swirling airflow in a combustion chamber in a nozzle blowing direction. 5. The LLC combustion processing apparatus according to claim 3, wherein said spray nozzle is constituted by a plurality of branch nozzles from the center.