JP4522875B2 - Waste oil combustion apparatus and drying apparatus using the waste oil combustion apparatus - Google Patents

Description

  The present invention relates to, for example, a waste oil combustion apparatus using waste oil such as lubricating oil and engine oil as a main fuel, and further relates to a drying apparatus for drying metal-worked cutting waste generated at a production site using the waste oil combustion apparatus.

  In steelworks and ironworks, mineral waste oil such as lubricating oil, insulating oil and engine oil is generated depending on the machine used. As a means for effectively using these waste oils, there is a combustion apparatus that uses waste oil as an auxiliary combustion fuel as shown in Patent Document 1. In addition, in a combustion apparatus using waste oil as fuel, carbon sludge adheres in the combustion furnace due to impurities contained in the waste oil, and maintenance for removing these is difficult.

  By the way, in steelworks, ironworks, etc., in addition to waste oil, metal-worked cutting scraps containing iron as a main component are generated in the production and use processes of iron. By reusing these metal-worked cutting scraps, resources can be used effectively.

  However, these metal-containing cutting scraps containing iron are contaminated with impurities such as moisture and lubricating oil. When using an electric furnace method that uses a small electric furnace to melt the metal cutting scraps and produce steel This causes the impurities to stick to the furnace wall at the time when the metal-cutting chips are melted in the electric furnace, resulting in a decrease in work efficiency and electric efficiency. In addition, this impurity may cause problems such as being mixed with the desired steel product, and a water vapor explosion may occur due to the contained moisture, making it difficult to recycle and drying the moisture. It is necessary to go through a drying process to skip the oil.

JP-A-8-334220

  SUMMARY OF THE INVENTION An object of the present invention is to provide a waste oil combustion apparatus that uses waste oil as a main fuel to efficiently burn waste oil and is excellent in maintainability.

  Moreover, an object of this invention is to provide the drying apparatus which can be made to recycle | reuse metal processing cutting waste using this waste oil combustion apparatus.

  A waste oil combustion apparatus according to the present invention includes a combustion furnace, waste oil fuel supply means for supplying waste oil fuel into the combustion furnace, and auxiliary combustion fuel supply means for supplying auxiliary fuel when burning the waste oil into the combustion furnace. Water supply means for supplying water into the combustion furnace, ignition means for heating and igniting the combustion furnace, the waste oil fuel and the auxiliary combustion fuel, and air supply means for supplying air to the combustion furnace. And a controller for controlling the ignition means, the waste oil fuel supply means, the auxiliary fuel supply means, the water supply means and the air supply means to operate at a predetermined timing for a predetermined time. When the waste oil fuel is burned, the control means supplies the waste oil fuel at a first flow rate and supplies the auxiliary fuel after operating the ignition means and the air supply means for a predetermined time. After the predetermined time has elapsed, the ignition means is stopped, the supply of the auxiliary fuel is stopped, the waste oil fuel is supplied at a second flow rate higher than the first flow rate, the air supply means and the water supply means It controls so that it may drive | operate, supplying air and water of predetermined flow volume from.

  Further, the air supply means may have water injection means for injecting water into a flow path for supplying air to the combustion furnace.

  A drying apparatus according to the present invention includes a waste oil combustion apparatus using waste oil as a fuel, and a drying furnace connected to the waste oil combustion apparatus and taking in flames and combustion heat injected from the waste oil combustion apparatus and using them as a heat source. The waste oil combustion apparatus comprises: a combustion furnace; waste oil fuel supply means for supplying waste oil fuel into the combustion furnace; auxiliary fuel supply means for supplying auxiliary fuel for burning waste oil into the combustion furnace; Water supply means for supplying water into the combustion furnace, ignition means for heating and igniting the combustion furnace, the waste oil fuel and the auxiliary fuel, and air supply means for supplying air to the combustion furnace; A control unit that controls the ignition means, the waste oil fuel supply means, the auxiliary fuel supply means, the water supply means, and the air supply means to operate for a predetermined time at the timing of: Burn the above waste oil fuel When the ignition means and the air supply means are operated for a predetermined time, the waste oil fuel is supplied at a first flow rate, the auxiliary combustion fuel is supplied, and the ignition means is stopped after the predetermined time has elapsed. The supply of the auxiliary fuel is stopped, the waste oil fuel is supplied at a second flow rate higher than the first flow rate, and operation is performed while supplying air and water at a predetermined flow rate from the air supply unit and the water supply unit. The drying furnace has a conveying means for drying the material to be dried input from the inlet by the combustion heat from the waste oil combustion device and conveying the material to be discharged to the discharge port. Features.

  The air supply means may include a duct for supplying air so as to send the combustion heat of the waste oil combustion apparatus to the drying furnace.

  The conveying means may be a spiral conveyor.

  Since the waste oil combustion apparatus of the present invention creates an atmosphere in which the waste oil easily burns in the combustion furnace and then burns the waste oil and uses the waste oil as the main fuel, the waste oil can be processed efficiently. In addition, this waste oil combustion apparatus includes a water supply unit that supplies water into the combustion furnace, and supplies water into the combustion furnace at a predetermined timing, so that the water supplied in the combustion furnace causes a steam explosion. It is possible to suppress the adhesion of carbon sludge in the combustion furnace and improve the maintainability.

  In addition, the drying apparatus of the present invention takes in the combustion heat from the waste oil combustion apparatus that uses waste oil as the main fuel into the drying furnace and dries the metal cutting chips that are to be dried. It is possible to reuse the metal-cutting chips generated along with this.

  Hereinafter, a waste oil combustion apparatus according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the waste oil combustion apparatus 1 includes a base 2, an annular combustion cylinder 3, a combustion furnace 4 provided inside the combustion cylinder 3, and the inside of the combustion furnace 4 is heated to supply fuel and the like. A burner 5 that ignites, a waste oil supply unit 6 that supplies waste oil as a main fuel into the combustion furnace 4, a kerosene supply unit 7 that supplies kerosene as a supplementary fuel into the combustion furnace 4, and water in the combustion furnace 4 2, a blower 9 that supplies air to the inside of the combustion cylinder 3, and a control unit 20 that controls the operation of the entire apparatus described in FIG. 2.

  The base 2 is a member made of a heat-resistant steel plate or the like, and is provided with a combustion cylinder 3 at the top. The base 2 is, for example, a heat exchanger for effectively using flames and heat from the combustion cylinder 3. Etc. are connected.

  The combustion cylinder 3 is made of a heat-resistant steel plate or the like, and has a cylindrical annular portion 3a, a top plate 3b that closes the upper end of the annular portion 3a, and a support provided at the bottom of the lower end of the annular portion 3a. It is comprised from the member 3c.

  The annular portion 3a is composed of two cylindrical lower annular portions 3a1 and upper annular portions 3a2, and the two annular portions 3a1 and 3a2 are vertically stacked, and an overlapping portion is fixed with, for example, a nut and a bolt. By fixing using a tool, it is formed in a cylindrical shape as a whole.

  The top plate 3b is provided with three connection holes 6a, 7a, 8a. A waste oil supply pipe 6g for supplying waste oil supplied from a pump 6d described later into the combustion cylinder 3 is connected to the connection hole 6a. Moreover, the waste oil pipe 6c and the waste oil supply pipe 6g in the combustion cylinder 3 are connected to the connection hole 6a so as to be continuous. The waste oil pipe 6c connected to the waste oil supply pipe 6g is configured to supply waste oil to a predetermined position in the combustion furnace 4 from the waste oil supply port 6b at the tip.

  A kerosene supply pipe 7f for supplying kerosene supplied from a pump 7d described later into the combustion cylinder 3 is connected to the connection hole 7a. Further, the kerosene pipe 7c and the kerosene supply pipe 7f are connected to the connection hole 7a so as to be continuous. The kerosene pipe 7c connected to the kerosene supply pipe 7f is configured to supply kerosene to a predetermined position in the combustion furnace 4 from the kerosene supply port 7b at the tip.

  A water supply pipe 8f that supplies water supplied from a pump 8d described later into the combustion cylinder 3 is connected to the connection hole 8a. Further, a water conduit 8c and a water supply pipe 8f are connected to the connection hole 8a so as to be continuous. The water conduit 8c connected to the water supply pipe 8f is configured to supply water to a predetermined position in the combustion furnace 4 from the water supply port 8b at the tip.

  The support member 3c is a support member that supports the combustion furnace 4 formed in a virtually. The support member 3 c is a crater 10 that ejects a flame generated in the combustion furnace 4 toward the base 2. Note that the support member 3 c is not limited to the five virtues as described above, and can support the combustion furnace 4 and eject a flame generated in the combustion furnace 4 toward the base 2. What is necessary is just to become the crater 10, for example, the support member formed in mesh shape may be sufficient.

  Further, a burner duct 5a and a blower duct 9a are connected to the upper ring portion 3a2 of the ring portion 3a.

  The burner duct 5a guides the flame from the burner 5 into the combustion cylinder 3, and is formed in an L shape as a whole. One end of the L-shaped burner duct 5 a is connected to the burner 5, and the other end is formed so that the opening end slightly enters the opening end of the combustion furnace 4 in the combustion cylinder 3 with a predetermined gap 5 c. ing.

  The blower duct 9a is connected above the burner duct 5a in the vicinity of the upper end of the annular portion 3a so that the air from the blower 9 can be uniformly supplied from the upper part to the lower part of the combustion cylinder 3. The blower duct 9a has a water injection part 9b for injecting water into the flow path. The water injection unit 9b is provided such that a nozzle 9c for injecting water into the flow path of the blower duct 9a faces the flow path of the blower duct 9a, and water is injected by the pump 9d. The water injection unit 9b cools the water blown from the nozzle 9c while suppressing thermal expansion of the blower duct 9a, the combustion cylinder 3, and the like. The water injection unit 9b may have any configuration as long as it can inject water into the flow path of the blower duct 9a.

  The combustion furnace 4 is made of a heat-resistant steel plate or the like, has a bottomed cylindrical shape, and is installed inside the combustion cylinder 3. The combustion furnace 4 is provided with a waste oil supply unit 6, a kerosene supply unit 7, and a water supply unit 8 at the top thereof. Waste oil, kerosene, and water supplied from the waste oil supply unit 6, the kerosene supply unit 7, and the water supply unit 8 accumulate in the bottom 4 a of the combustion furnace 4. The waste oil dripped into the combustion furnace 4 is heated in the combustion furnace 4 to be vaporized and burned. Kerosene dropped into the combustion furnace 4 is supplied so that the waste oil is easily ignited, and is heated and vaporized and burned by the burner 5 in the combustion furnace 4. Further, the water dropped into the combustion furnace 4 accumulates at the bottom 4a of the combustion furnace 4 and reacts with waste oil or kerosene heated by the combustion heat to cause a steam explosion, and on the inner surface of the combustion furnace 4 due to impurities contained in the waste oil. Fly off the adhering carbon sludge.

  An upper portion of the combustion furnace 4 is provided with an ejection return prevention pipe 11 at a portion corresponding to the upper portion of the combustion furnace 4 of the burner duct 5a. The combustion furnace 4 is provided with a number of ejection holes 12 through which flames generated in the combustion furnace 4 are ejected at the upper part of the side wall.

  Further, high-temperature gas generated in the combustion furnace 4 is discharged from the gap 5c between the combustion furnace 4 and the burner duct 5a. In the combustion furnace 4, high-temperature gas is generated inside as the thermal power increases. This high-temperature gas accumulates in the combustion furnace 4, gradually rises, and is ejected from the ejection hole 12 and finally from the gap 5c. The high-temperature gas discharged from the gap 5c passes between the inside of the combustion cylinder 3 and the outside of the combustion furnace 4, and is discharged from the crater 10 together with the flame 10a.

  The ejection return prevention pipe 11 is formed integrally with the burner duct 5a so as to penetrate the burner duct 5a above the combustion furnace 4. A waste oil pipe 6c, a kerosene pipe 7c, and a water conduit 8c are inserted through the ejection return prevention pipe 11. The blowout prevention pipe 11 prevents the flame generated in the combustion furnace 4 from reaching the burner 5 through the burner duct 5a when the operation of the burner 5 is stopped. Further, an introduction pipe 13 having a smaller diameter than the ejection return prevention pipe 11 is attached to the lower end of the ejection return prevention pipe 11. The introduction pipe 13 guides the dropped waste oil, kerosene and water to the bottom 4 a of the combustion furnace 4. Further, a gap 11 a is provided between the ejection return prevention pipe 11 and the introduction pipe 13. During the operation of the burner 5, the gap 11 a supplies air to the area A inside the burner duct 5 a and outside the introduction pipe 13 in the upper part of the combustion furnace 4. Further, the gap 11a prevents air from being blown back to the burner 5 due to combustion of waste oil in the combustion furnace 4 because air from the blower 9 is jetted when the burner 5 is stopped.

  The combustion cylinder 3 is provided with an air outlet 14 for guiding the air from the blower 9 to the lower end of the combustion cylinder 3 on the inner side of the combustion cylinder 3 and the outer side of the burner duct 5a in the vicinity of the upper portion of the combustion furnace 4. Yes. The air outlet 14 is provided near the inner side surface of the combustion cylinder 3 and outside the side surface of the combustion furnace 4. The air jetted from the air jet 14 is a flame or high-temperature gas jetted from the jet hole 13 by combustion because the air jet 14 is provided near the inner side surface of the combustion cylinder 3 and outside the side surface of the combustion furnace 4. Can be led to the crater 10 at the lower end of the combustion cylinder 3, and unburned fuel can be burned at that time.

  The air outlet 14 may have a throttle mechanism that can change the size of the opening, and may be configured to adjust the amount of air passing therethrough by adjusting the throttle mechanism. Good.

  The burner 5 is connected to one end of the burner duct 5a and is operated using, for example, kerosene. The burner 5 dissipates the combustion heat in the direction shown by the arrow D1 in FIG. 1, and heats the combustion furnace 4 via the burner duct 5a. The burner 5 is not limited to one using kerosene, but may be one using gas or the like.

  The waste oil supply unit 6 supplies waste oil as main fuel to the combustion furnace 4, and includes a pump 6d, a first waste oil flow rate adjustment valve 6e, a second waste oil flow rate adjustment valve 6f having a larger flow rate, and a pump. A waste oil supply pipe 6g that leads waste oil from 6d to the combustion cylinder 3 and a waste oil pipe 6c that is continuously connected to the waste oil supply pipe 6g through the connection hole 6a and that has a waste oil supply port 6b at the tip. ing. The pump 6d is a pump that supplies waste oil into the combustion cylinder 3 through a waste oil supply pipe 6g. The waste oil pipe 6c is a pipe that supplies the waste oil from the pump 6d to the waste oil supply port 6b, and is inserted into the ejection return prevention pipe 11 and the introduction pipe 13 from the connection hole 6a. Further, the waste oil pipe 6 c is provided so that the waste oil supply port 6 b is located substantially at the center of the opening of the introduction pipe 13, and prevents carbon sludge from adhering to the introduction pipe 13. For example, a cross-shaped guide may be provided on the side of the waste oil pipe 6c so that the waste oil supply port 6b is reliably positioned at the center of the opening of the introduction pipe 13. The waste oil supply port 6b has a diameter similar to that of the waste oil pipe 6c so that the waste oil can be dropped into the combustion furnace 4 in a gravity drop manner, for example. Since the waste oil supply port 6b is formed to have substantially the same diameter as the waste oil pipe 6c, it is not clogged and the pump 6d does not require high pressure. The first waste oil flow rate adjustment valve 6e and the second waste oil flow rate adjustment valve 6f adjust the flow rate of the waste oil by, for example, two solenoid valves having different flow rates. The first waste oil flow rate adjustment valve 6e and the second waste oil flow rate adjustment valve 6f are not limited to those described above, and a motor valve, a solenoid valve, an air valve, or the like may be used.

  The kerosene supply unit 7 supplies kerosene as auxiliary fuel to the combustion furnace 4, and includes a pump 7 d, a kerosene flow rate adjusting valve 7 e, a kerosene supply pipe 7 f that leads the kerosene from the pump 7 d to the combustion cylinder 3, and a connection hole It comprises a kerosene pipe 7c that is connected continuously to the kerosene supply pipe 7f through 7a and has a kerosene supply port 7b at the tip. The pump 7d is a pump that supplies kerosene into the combustion cylinder 3 through the kerosene supply pipe 7f. The kerosene pipe 7c is a pipe that supplies kerosene from the pump 7d to the kerosene supply port 7b. The kerosene pipe 7c is formed in such a length that the kerosene supply port 7b comes to a position where it slightly enters the ejection return prevention pipe 11 in the vicinity of the upper end of the ejection return prevention pipe 11 from the connection hole 7a. The kerosene supply port 7b has a diameter similar to that of the kerosene tube 7c so that kerosene can be dropped into the combustion furnace 4 in a gravity drop manner, for example. Since the kerosene supply port 7b is formed to have substantially the same diameter as the kerosene pipe 7c, the kerosene supply port 7b is not clogged and the pump 7d does not require high pressure. Further, since the kerosene supply port 7b drops kerosene from above the combustion furnace 4, the kerosene is scattered and the flame of the burner 5 is easily ignited. The kerosene flow rate adjusting valve 7e adjusts the flow rate of kerosene by, for example, a solenoid valve. The kerosene flow rate adjusting valve 7e is not limited to the above, and a motor valve, a solenoid valve, an air valve, or the like may be used.

  The water supply unit 8 supplies waste oil or kerosene heated to the combustion furnace 4 and water that causes a steam explosion, and guides water from the pump 8d, the water flow rate adjustment valve 8e, and the pump 8d to the combustion cylinder 3. It is composed of a water supply pipe 8f and a water conduit 8c that is continuously connected to the water supply pipe 8f through a connection hole 8a and has a water supply port 8b at the tip. The pump 8d is a pump that supplies water into the combustion cylinder 3 through the water supply pipe 8f. The water conduit 8c is a pipe that supplies water from the pump 8d to the water supply port 8b. The water conduit 8c is formed in such a length that the water supply port 8b comes to a position where it slightly enters the ejection return prevention pipe 11 in the vicinity of the upper end of the ejection return prevention pipe 11 from the connection hole 8a. The water supply port 8b has a diameter similar to that of the water conduit 8c so that water can be dropped into the combustion furnace 4 in a gravity drop manner, for example. Since the water supply port 8b is formed to have substantially the same diameter as the water conduit 8c, the water supply port 8b is not clogged, and the pump 8d does not require high pressure. In the water supply unit 8, water is dripped into the combustion furnace 4 from a water supply port 8 b provided above the combustion furnace 4, so that a water vapor explosion occurs in the combustion furnace 4, and an ejection return prevention pipe 12, an introduction pipe 13. Prevent carbon sludge from adhering to the waste oil supply port 6b and the like. The water flow rate adjustment valve 8e adjusts the flow rate of water by, for example, a solenoid valve. The water flow rate adjusting valve 8e is not limited to the above, and a motor valve, a solenoid valve, an air valve, or the like may be used.

  The blower 9 is connected to the combustion cylinder 3 through a blower duct 9a. The air supplied by the blower 9 flows in the direction indicated by the arrow D <b> 2 in FIG. 1 and flows from the upper part to the lower part of the combustion cylinder 3. Specifically, the air supplied by the blower 9 is discharged from the crater 10 through the upper part of the combustion cylinder 3 through the ejection return prevention pipe 11 and the air ejection port 14. The air passing through the ejection return prevention pipe 11 is efficiently supplied to the combustion furnace 4 by passing through the gap 11 a provided in the connection portion with the introduction pipe 13 and the introduction pipe 13. The air passing through the air outlet 14 passes between the inside of the combustion cylinder 3 and the outside of the combustion furnace 4 and is discharged from the crater 10. The air passing through the air outlet 14 enables a complete combustion of the waste oil, that is, a smokeless state, by supplying sufficient air to the flame ejected from the ejection hole 13 and the gap 5c.

  As shown in FIG. 2, in the control unit 20, a CPU (Central Processing Unit) 20a, a memory 20b, and a timer 20c are connected to each other via a bus 20d. The memory 20b stores a drive timing program for each member. The timer 20c counts the start time of each operation. The CPU 20a counts the time from the timer 20c, and controls the operation of each member by a program from the memory 20b. Therefore, the control unit 20 includes the burner 5, the pumps 6d, 7d, and 8d, the first waste oil flow rate adjustment valve 6e, the second waste oil flow rate adjustment valve 6f, the kerosene flow rate adjustment valve 7e, and the water flow rate adjustment valve. 8e, the blower 9, and the water injection part 9b are connected, and each output is controlled.

  Next, the operation | movement which burns waste oil using the waste oil combustion apparatus 1 comprised in this way is demonstrated. As shown in FIG. 3, in step S <b> 1, the user turns on the power of the waste oil combustion apparatus 1. In step S <b> 2, the control unit 20 operates the burner 5, the pumps 6 d, 7 d, 8 d and the blower 9.

  In step S3, the control unit 20 determines whether or not a predetermined time, for example, 2 minutes has elapsed since the start of operation of the burner 5 in step S2, the pumps 6d, 7d, 8d, and the blower 9. When it is determined that the predetermined time has not elapsed, the control unit 20 repeats step S3. If the control unit 20 determines that a predetermined time has elapsed, the control unit 20 proceeds to step S4. The reason why each part is operated for a predetermined time in step S3 is that the burner 5 heats the inside of the combustion furnace 4 to create an atmosphere in which waste oil is easy to burn.

  Next, in step S4, the control unit 20 opens the kerosene flow rate adjustment valve 7e and opens the first waste oil flow rate adjustment valve 6e.

  In step S5, the control unit 20 determines whether or not a predetermined time, for example, 5 minutes has elapsed since the kerosene flow rate adjustment valve 7e and the first waste oil flow rate adjustment valve 6e in step S4 were opened. When it is determined that the predetermined time has not elapsed, the control unit 20 repeats step S5. If the control unit 20 determines that a predetermined time has elapsed, the control unit 20 proceeds to step S6. The reason why each part is operated for a predetermined time in step S5 is that kerosene is ignited in the combustion furnace 4 heated by the burner 5 and waste oil is burned.

  In step S6, the control unit 20 stops the operation of the burner 5 and the pump 7d, closes the kerosene flow rate adjustment valve 7e, and sets the second waste oil flow rate adjustment valve 6f having a higher flow rate than the first waste oil flow rate adjustment valve 6e. Open the water flow rate adjustment valve 8e. At this time, the first waste oil flow rate adjustment valve 6e remains open.

  Thus, the waste oil combustion apparatus 1 performs combustion in a state in which the first waste oil flow rate adjustment valve 6e and the second waste oil flow rate adjustment valve 6f are opened and the kerosene flow rate adjustment valve 7e is closed, that is, only waste oil is used as fuel. It will be. Further, at this time, in the waste oil combustion apparatus 1, water is dropped into the combustion furnace 4 by the water supply unit 8, so that a steam explosion occurs in the combustion furnace 4 and adheres to the inner surface of the combustion furnace 4 and the like. Can be prevented and maintenance can be improved. In addition, the waste oil combustion apparatus 1 can prevent jetting back to the burner 5 because air is supplied from the gap 11a between the jetting back prevention pipe 11 and the introduction pipe 13 during combustion of the waste oil.

  The water injection part 9b is provided for the purpose of cooling the annular part 3a and the like. For example, it is determined whether a predetermined time has elapsed since the start of the operation of the waste oil combustion apparatus 1, and water injection is started. It is controlled.

  Then, the operation | movement which stops the driving | operation of the waste oil combustion apparatus 1 which is burning waste oil is demonstrated. Here, the waste oil combustion device 1 that is burning waste oil means that the first waste oil flow rate adjustment valve 6e and the second waste oil flow rate adjustment valve 6f are opened and the kerosene flow rate adjustment valve 7e is closed, that is, only waste oil. It is the combustion in the state using as fuel.

  As shown in FIG. 4, the user turns off the power of the waste oil combustion apparatus 1 in step S11. In step S12, the control unit 20 closes the second waste oil flow rate adjustment valve 6f, operates the burner 5, closes the water flow rate adjustment valve 8e, and stops the operation of the pump 8d. Here, the reason why the control unit 20 operates the burner 5 again is to prevent incomplete combustion of the waste oil and make it smokeless.

  Next, in step S13, the control unit 20 closes the first waste oil flow rate adjustment valve 6e and stops the operation of the pump 6d.

  In step S14, the control unit 20 closes the first waste oil flow rate adjustment valve 6e, and determines whether or not a predetermined time, for example, 3 minutes has elapsed since the operation of the pump 6d was stopped. When it is determined that the predetermined time has not elapsed, the control unit 20 repeats step S14. If the control unit 20 determines that a predetermined time has elapsed, the control unit 20 proceeds to step S15. The reason for operating each part for a predetermined time in step S14 is to burn the waste oil supplied into the combustion furnace 4 to the end.

  In step S15, the control unit 20 stops the operation of the burner 5.

  In step S16, the control unit 20 determines whether a predetermined time, for example, 10 minutes has elapsed since the burner 5 was stopped. When it is determined that the predetermined time has not elapsed, the control unit 20 repeats step S16. If the control unit 20 determines that a predetermined time has elapsed, the control unit 20 proceeds to step S17. The reason why each part is operated for a predetermined time in step S16 is to cool the entire combustion cylinder 3 heated by the combustion.

  Finally, in step S17, the control unit 20 stops the operation of the blower 9.

  As described above, when the operation of the waste oil combustion apparatus 1 is stopped, the control unit 20 stops the supply of the waste oil and operates the burner 5 so that the waste oil remaining in the combustion furnace 4 is completely burned by the burner 5. Control to prevent incomplete combustion and smokeless combustion.

  As described above, when the waste oil combustion apparatus 1 starts the operation of the waste oil combustion apparatus 1, first, the inside of the combustion furnace 4 is heated only by the burner 5, and subsequently, two liquids of kerosene and waste oil are supplied to the combustion furnace 4. The waste oil is ignited by ignition of kerosene that is supplied and easily ignited. Finally, the supply of kerosene is stopped, the supply amount of waste oil is increased, and only the waste oil is burned. Therefore, the waste oil combustion apparatus 1 increases the supply amount of waste oil while making the combustion furnace 4 in an atmosphere in which the waste oil is easily combusted by the control unit 20, and can burn only the waste oil as fuel.

  Further, since the waste oil combustion apparatus 1 controls the control unit 20 to start the combustion of only the waste oil and at the same time to open the water flow rate adjustment valve 8e, water is dripped into the combustion furnace 4, a steam explosion occurs, and the combustion cylinder 3 can prevent carbon sludge from adhering to the inside.

  When the user desires to increase the thermal power, the user operates an operation unit (not shown) connected to the control unit 20 to control the temperature by changing the flow rate of air blown from the blower 9 and the amount of waste oil. You can also.

  As described above, for example, the state of step S3 is described as continuing for 2 minutes. However, the present invention is not limited to this, and this time is increased depending on the volume of the combustion furnace 4 and the output of the burner 5 and blower 9. It may be shortened or shortened. However, it is necessary to set the time shown here for each purpose, for example, in the above case, sufficient time to heat the inside of the combustion furnace 4 so that the waste oil can easily burn.

  In addition, as described above, the two waste oil flow rate adjusting valves 6e and 6f having different flow rates are provided. However, the present invention is not limited to this, and any valve having a configuration that can increase or decrease the flow rate may be used.

  Further, as described above, the control unit 20 controls the waste oil combustion apparatus 1 by operating for a predetermined time. However, the control unit 20 is not limited to this, and for example, a temperature sensor is provided at a predetermined position near the outlet of the crater 10. The amount of waste oil supplied or the amount of air supplied to the blower 9 can be adjusted according to the temperature detected by the temperature sensor.

  By the way, when a drying furnace is connected to the above-described waste oil combustion device and used as a drying device for drying metal-worked cutting waste, the waste oil can be effectively used and the metal-working cutting waste can be dried for reuse of the metal-working cutting waste. Can be made.

  Next, the drying apparatus which connects a drying furnace to the above waste oil combustion apparatuses and dries metalworking cutting waste is demonstrated.

  FIG. 5 is a diagram schematically showing the drying apparatus of the present invention. The drying apparatus 100 includes a waste oil combustion apparatus 30 and a drying furnace 40 that is connected to the waste oil combustion apparatus 30 and uses combustion heat from the waste oil combustion apparatus 30 as a heat source. The drying apparatus 100 includes, for example, a metal-worked cutting waste 50 that is an object to be dried from an input port 41 b provided in the upper part of the drying furnace 40 by the belt conveyor 101, and a waste oil combustion apparatus 30 connected to the drying furnace 40. The metal-worked cutting waste 50 dried by the combustion heat is discharged from a discharge port 41d provided in the lower part of the drying furnace 40. The discharged metal-worked cutting waste 50 is collected in, for example, the bucket 102, and is melted and reused in a blast furnace or the like.

  The waste oil combustion device 30 includes a base 31 provided in place of the base 2 of the waste oil combustion device 1 and a duct portion 33a provided in place of the support member 3c at the bottom of the combustion cylinder 3 of the waste oil combustion device 1. In addition to the configuration of the waste oil combustion apparatus 1 described above, the support member 33 includes an air duct 32 through which the flame 10a from the crater 10 is sent to the drying furnace 40 at the subsequent stage. In addition, in the waste oil combustion apparatus 30, about the structure similar to the waste oil combustion apparatus 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 5 to 7, the waste oil combustion apparatus 1 heats a base 31, an annular combustion cylinder 3, a combustion furnace 4 provided inside the combustion cylinder 3, and the inside of the combustion furnace 4. A burner 5 that ignites fuel, a waste oil supply unit 6 that supplies waste oil as a main fuel into the combustion furnace 4, a kerosene supply unit 7 that supplies kerosene as a supplementary fuel into the combustion furnace 4, and the combustion furnace 4 A water supply unit 8 that supplies water to the inside, a blower 9 that supplies air to the inside of the combustion cylinder 3, and a flame from the crater 10 that sends air from the blower 9 to the crater 10 and is provided outside the combustion cylinder 3. It is comprised from the air duct 32 which sends 10a to the drying furnace 40 of a back | latter stage.

  The waste oil combustion apparatus 30 can be connected to a drying furnace 40 to be described later on the base 31 and can be a drying apparatus 100 that can effectively utilize the combustion energy generated from the waste oil combustion apparatus 30 as a whole. .

  The base 31 is a member made of a heat-resistant steel plate or the like, and the combustion cylinder 3 is provided on the upper part. Further, the base 31 is provided with a duct portion 31a having an annular shape therein, and one opening 31b (see FIG. 7) of the duct portion 31a is communicated with the duct portion 32b of the air duct 32. The other opening 31c (see FIG. 7) is connected to a drying furnace 40 described later. The base 31 circulates the air from the duct portion 32b of the air duct 32 communicated with the duct portion 31a to the drying furnace 40, and emits a downward flame ejected from the crater 10 at the bottom of the combustion cylinder 3 at the upper portion of the base 31. A horizontal flame 10a is formed along the flow path of the duct portion 31a, and the flame and combustion heat are efficiently sent to the metal-worked cutting waste 50 that is an object to be dried in the furnace body 41 of the drying furnace 40 described later. In addition, a rectifying plate 31 d provided with a large number of holes is attached to the opening 31 b of the base 31, and air from the air duct 32 is rectified and circulated to the duct portion 31 a in the base 31. Furthermore, the opening 31c of the base 31 is slightly smaller in diameter than the inside of the base 31, and the flame is ejected vigorously to the drying furnace 40 at the subsequent stage.

  The base 31 can be air-cooled by providing a separate blower to cool the base 31, or can be water-cooled by providing a pump.

  The air duct 32 includes a cylindrical duct annular portion 32a having a slightly larger diameter than the lower annular portion 3a2, an opening 32d provided on the side wall of the duct annular portion 32a, and one of the duct portion 31a of the base 31. It is comprised from the duct part 32b which connects the opening part 31b. The air duct 32 is connected to a blower duct 9e serving as an air flow path from the blower 9 in an opening 32c provided on a side wall of the duct ring portion 32a. The air duct 32 takes in air from the blower 9 into the duct ring portion 32a through the blower duct 9e and cools the combustion cylinder 3 with air, and the air is communicated with the duct portion 32b and the duct portion 32b. And sent to the drying furnace 40 together with the flame generated in the waste oil combustion device 30.

  The duct ring part 32a has a cylindrical shape slightly larger in diameter than the lower ring part 3a2, and the air from the blower 9 circulates through the blower duct 9e on the same plane as the blower duct 9a on the side wall of the duct ring part 32a. It has the opening part 32c and the opening part 32d connected with the duct part 32b.

  One end of the duct portion 32b is connected to the opening portion 32d of the duct ring portion 32a, and the other end is connected to the opening portion 31b of the base 31, and the inside of the duct ring portion 32a is combusted via the blower duct 9e. The air that has flowed into the region outside the cylinder 3 is caused to flow out to the duct portion 31a of the base 31, as indicated by an arrow D3 in FIG.

  Further, the air duct 32 is connected to the crater direction control duct 32e on the side wall of the duct ring portion 32a, and can control the direction of the flame 10a ejected from the opening 31c of the base 31. The crater direction control duct 32e has one end connected to an opening 32f provided at a predetermined position on the side wall of the duct ring portion 32a, and the other end connected to the vicinity of the upper portion of the opening 31c of the base 31. Air is ejected substantially downward from the vicinity of the upper portion of the opening 31c (see arrow D4 in FIG. 7), and the direction of the flame from the combustion furnace 4 can be controlled.

  Further, the air duct 32 is communicated with a duct portion 33a provided in the pipe-shaped support member 33 at the bottom of the duct ring portion 32a, and air flowing into the air duct 32 from the blower 9 is circulated to the duct portion 33a. Let The support member 33 is made of a pipe-like member, and is formed in a five-virtual shape so as to become the crater 10 that supports the combustion furnace 4 and jets the flame generated in the combustion furnace 4 to the duct portion 31a of the base 31. ing. The duct portion 33 a hits a cavity inside the support member 33, and causes the inflowing air to be ejected to the duct portion 31 a of the base 31. The support member 33 is not limited to the above, and serves as the crater 10 that supports the combustion furnace 4 and can eject the flame generated in the combustion furnace 4 toward the base 31. Any ring may be used as long as it allows air to flow therethrough.

  The blower duct 9 e is a duct that is connected to the blower duct 9 a and sends air from the blower 9 to the duct ring portion 32 a of the air duct 32.

  The waste oil combustion apparatus 30 configured as described above cools the combustion cylinder 3 by causing the air from the blower 9 to flow through the duct ring portion 32a. Further, the waste oil combustion device 30 causes the air from the blower 9 that has circulated through the duct ring portion 32a to flow into the duct portion 31a of the base 31 via the duct portion 32b and strikes it from the side of the crater 10, thereby burning The combustion heat and flame generated in the cylinder 3 are turned sideways, and the flame and combustion heat can be efficiently supplied into the furnace body 41 of the drying furnace 40 connected to the subsequent stage.

  Next, the drying furnace 40 connected to the waste oil combustion apparatus 30 will be described.

  As shown in FIG. 8, the drying furnace 40 includes a cylindrical furnace main body 41, a spiral conveyor 42 provided along the central axis of the furnace main body 41, and a pedestal 43 to which the furnace main body 41 is fixed. Yes.

  The furnace body 41 is made of a heat-resistant steel plate or the like and has a cylindrical shape. One end 41 a is connected to the opening 31 b of the base 31, and the combustion energy from the waste oil combustion device 30 can be taken in. Further, the furnace body 41 discharges the dried metal-working cutting waste 50 from the lower portion of the furnace body 41, the inlet 41 b through which the metal-working cutting waste 50 that is a material to be dried is placed from the upper portion of the furnace body 41. And a discharge port 41d. The furnace body 41 is provided with a spiral conveyor 42 that rotates along the central axis thereof. The spiral conveyor 42 has a shaft 44 and a bearing attached to the side of the furnace body 41 to which the waste oil combustion device 30 is not connected. 45. The insertion port 41b is an opening provided on the side wall of the furnace body 41 on the one end 41a side of the furnace body 41. For example, metal processing cuttings 50 that is a material to be dried conveyed by a belt conveyor or the like is introduced from the upper part of the furnace body. be able to. The exhaust port 41 c is an opening provided on the side wall of the furnace body 41 at a stage after the furnace body 41 than the input port 41 b, and gas such as high-temperature gas generated by the flame from the waste oil combustion device 30 is discharged. The discharge port 41d is an opening provided on the side wall of the furnace body 41 at the rear stage of the furnace body 41 than the exhaust port 41c, and is dried by the flame of the waste oil combustion device 30 to burn impurities, and is processed by the spiral conveyor 42. Cutting waste 50 is discharged.

  The spiral conveyor 42 is a member in which a heat-resistant steel plate or the like is formed in a spiral shape, and the shaft 44 rotates to convey the metal-worked cutting waste 50 introduced from the insertion port 41b to the discharge port 41d. Further, the spiral conveyor 42 is provided with a plurality of protruding pieces 42 a at predetermined intervals. The protruding pieces 42 a scrape up the metal-worked cutting waste 50 accumulated at the bottom of the furnace body 41 and efficiently remove the waste oil from the waste oil combustion device 30. It is provided so that the combustion heat of

  The shaft 44 is connected to the end of the spiral conveyor 42 opposite to the opening 41 a of the furnace body 41, and the shaft 44 is rotated by a drive motor 46 coupled to the shaft 44, thereby causing the spiral conveyor 42 to move. Drive. The shaft 44 is provided in the same direction as the central axis direction of the duct portion 31 a of the base 31, and can efficiently take the flame 10 a sent along the central axis of the duct portion 31 a of the base 31 into the furnace body 41. it can.

  The drive motor 46 is connected to the spiral conveyor 42 via a shaft 44, and the rotational speed of the spiral conveyor 42 according to a value from a temperature sensor (not shown) provided at a predetermined location inside the furnace body 41, The amount of rotation can be controlled.

  The drying furnace 40 configured as described above rotates the drive motor 46, rotates the spiral conveyor 42, and dries the metal-worked cutting waste 50 input from the input port 41b by the combustion heat from the waste oil combustion device 30. At the same time, it is conveyed to the discharge port 41d and discharged.

  Further, the drying furnace 40 has a shaft 44 of the drying furnace 40 provided in the same direction as the central axis direction of the duct portion 31a serving as a combustion heat and flame flow path of the base 31 of the waste oil combustion apparatus 30 and spiral. Since the metal working cuttings 50 are conveyed while being agitated by the conveyor 42 and the projecting pieces 42a, the flame 10a ejected from the base 31 of the waste oil combustion device 30 is efficiently spread over the metal working cuttings 50 in the furnace body 41 over a wide range. Can be applied over and dried.

  Further, as described above, the waste oil combustion apparatus 30 and the drying furnace 40 can use the waste oil that has been conventionally discarded as fuel for the drying furnace 40, and dry the metal-worked cutting waste 50 generated in a factory or the like. Can be reused.

  In addition, air from the blower 9 that flows in through the air duct 32 flows into the duct portion 31a of the base 31, and the flame ejected from the crater 10 is changed to the horizontal flame 10a, and the drying furnace 40 connected to the subsequent stage. However, the present invention is not limited to this, and depending on the shape of the drying furnace to be connected, the direction of the flame to be ejected may be an upward flame.

It is sectional drawing of the waste oil combustion apparatus to which this invention is applied. It is a block diagram of the waste oil combustion apparatus to which this invention is applied. It is the flowchart explaining until waste oil is burned in the waste oil combustion apparatus to which this invention is applied. It is the flowchart explaining until it stops the combustion of waste oil in the waste oil combustion apparatus to which this invention is applied. It is a perspective view which shows the apparatus structure of the other waste oil combustion apparatus to which this invention is applied. It is sectional drawing in XX 'of FIG. 5 of the other waste oil combustion apparatus to which this invention is applied. It is sectional drawing in YY 'of FIG. 5 of the other waste oil combustion apparatus to which this invention is applied. It is a figure which shows the structure of the drying furnace connected with the waste oil combustion apparatus to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waste oil combustion apparatus, 2 bases, 2a One opening part, 2b The other opening part, 3 Combustion cylinder, 3a Ring part, 3a1 Lower ring part, 3a2 Upper ring part, 3b Top plate, 3c Support member, 4 Combustion furnace, 5 burner, 6 Waste oil supply section, 6a, 7a, 8a Connection hole, 6b Waste oil supply port, 6c Waste oil pipe, 6d, 7d, 8d Pump, 6e First waste oil flow rate adjustment valve, 6f Second waste oil Flow adjustment valve, 6g Waste oil supply pipe, 7 Kerosene supply part, 7b Kerosene supply port, 7c Kerosene pipe, 7e Kerosene flow adjustment valve, 7f Kerosene supply pipe, 8 Water supply part, 8b Water supply port, 8c Water pipe, 8e Water flow rate Regulating valve, 8f Water supply pipe, 9 blower, 9a blower duct, 10 crater, 11 spout prevention pipe, 12 spout hole, 13 introduction pipe, 14 air spout, 20 control unit, 20a CPU, 20b memory, 20c timer, 20d Bus, 30 Waste oil combustion Equipment, 31 base, 32 air duct, 33 support member, 40 drying furnace, 41 furnace body, 41a opening, 41b inlet, 41c outlet, 41d outlet, 42 spiral conveyor, 43 mount, 44 shaft, 45 bearing, 46 Drive motor

Claims (5)

A combustion furnace;
Waste oil fuel supply means for supplying waste oil fuel into the combustion furnace;
Auxiliary combustion fuel supply means for supplying auxiliary combustion fuel when burning waste oil into the combustion furnace,
Water supply means for supplying water into the combustion furnace;
Ignition means for heating and igniting the inside of the combustion furnace, the waste oil fuel and the auxiliary combustion fuel;
Air supply means for supplying air to the combustion furnace;
A controller for controlling the ignition means, the waste oil fuel supply means, the auxiliary fuel supply means, the water supply means and the air supply means to operate at a predetermined timing for a predetermined time;
When the waste oil fuel is burned, the control means supplies the waste oil fuel at a first flow rate and supplies the auxiliary fuel after operating the ignition means and the air supply means for a predetermined time. After a lapse of time, the ignition means is stopped, the supply of the auxiliary fuel is stopped, the waste oil fuel is supplied at a second flow rate higher than the first flow rate, and predetermined from the air supply means and the water supply means. A waste oil combustion apparatus controlled to operate while supplying air and water at a flow rate.   2. The waste oil combustion apparatus according to claim 1, wherein the air supply means includes water injection means for injecting water into a flow path for supplying air to the combustion furnace. A waste oil combustion apparatus that uses waste oil as fuel, and a drying furnace that is connected to the waste oil combustion apparatus and that takes in flames and combustion heat injected from the waste oil combustion apparatus and uses them as a heat source,
The waste oil combustion apparatus supplies a combustion furnace for injecting flame into the drying furnace, waste oil fuel supply means for supplying waste oil fuel into the combustion furnace, and auxiliary fuel for burning the waste oil into the combustion furnace. Auxiliary fuel supply means, water supply means for supplying water into the combustion furnace, ignition means for heating and igniting the combustion furnace, the waste oil fuel and the auxiliary fuel, and supplying air to the combustion furnace And an air supply means for controlling the ignition means, the waste oil fuel supply means, the auxiliary fuel supply means, the water supply means and the air supply means to operate at a predetermined timing for a predetermined time. And
When the waste oil fuel is burned, the control means supplies the waste oil fuel at a first flow rate and supplies the auxiliary fuel after operating the ignition means and the air supply means for a predetermined time. After a lapse of time, the ignition means is stopped, the supply of the auxiliary fuel is stopped, the waste oil fuel is supplied at a second flow rate higher than the first flow rate, and predetermined from the air supply means and the water supply means. Control to operate while supplying air and water at a flow rate,
The drying furnace includes a transporting unit that transports the material to be dried to a discharge port while drying the material to be dried input from a charging port by combustion heat from the waste oil combustion device.   4. The drying apparatus according to claim 3, wherein the air supply means has a duct for supplying air so as to send combustion heat of the waste oil combustion apparatus to the drying furnace. 4. The drying apparatus according to claim 3, wherein the conveying means is a spiral conveyor.

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