JP2017057281A - Heavy oil and waste oil mixer and mixing method of heavy oil and waste oil using the same mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heavy oil and waste oil mixer capable of always supplying a homogeneous mixed fuel to a burner by recycling by refluxing again the mixed fuel in which a component ratio is different between upper and lower layers by a specific gravity difference during storage in a mixing tank after manufacturing the mixed fuel by agitating and mixing by ejecting a mixed liquid of heavy oil and waste oil into an agitating tank and storing the produced mixed fuel in the storage tank, and a mixing method of the heavy oil and waste oil, which uses the mixer.SOLUTION: A heavy oil and waste oil mixer is provided which includes an agitating tank that manufactures a mixed fuel by agitating and mixing a mixed liquid of a heavy oil and a waste oil after ejecting the mixed liquid from a nozzle of an upper part while pressurizing, and a storage tank that stores the fuel manufactured in the agitating tank, in which fuels having different mixing ratios resulted by separation of the heavy oil and the waste oil accompanying temporal change of the stored synthetic oil are taken out from an upper part and a lower part of the storage tank and regenerated by refluxing to the agitating tank, and further, when an amount of the mixed fuel decreased by supply to the burner is detected by a liquid level meter and when the liquid level falls to a lower limit value, by newly sending a definite amount of the heavy oil and waste oil to the agitating tank, the storage amount of the mixed fuel is recovered. Also provided is a mixing method of heavy oil and waste oil using the same mixer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heavy oil waste oil mixing device and a method of mixing heavy oil and waste oil using the same, and in particular, not only immediately supplying a mixed fuel produced by mixing heavy oil and waste oil to a burner, but also the mixing A certain amount of fuel is stored in a storage tank, and separation of heavy oil and waste oil due to aging of the stored mixed fuel is taken into account, and the stored mixed fuel is stirred in a stirring tank every time a certain period of time elapses. The present invention relates to a heavy oil waste oil mixing device that can always supply a homogeneous mixed fuel to a burner, and a method of mixing heavy oil and waste oil using the same device.

Several techniques relating to an apparatus and a manufacturing method for producing a mixed fuel by stirring and mixing heavy oil and waste oil have already been disclosed.
For example, in Patent Document 1,
[[Claim 1] A mixer that stirs and mixes fuel oil and waste oil sent out by a pump, and a burner that burns mixed oil of fuel oil and waste oil sent out from the mixer. After starting, the combustion apparatus is characterized in that the pump is driven and controlled so that the mixing ratio of the fuel oil to the heavy oil becomes a predetermined value at which an optimum combustion state of the mixed oil is obtained. ]
Is disclosed.
In the specification, the following description is made roughly as an embodiment. That is, “the combustion apparatus according to this embodiment includes a heavy oil tank 1, a waste oil tank 7, a pump 12 for supplying waste oil, a burner 13, and a small mixer 17. Among these, the heavy oil tank 1 stores heavy oil, and the heavy oil is stirred by a stirring blade 1 b rotated by a heavy oil stirring motor 1 a and supplied to the mixer 17 through the supply pipe 2 and the open / close valves 3 and 4.
Also, in the waste oil tank 7, the input waste oil is temporarily stored and stirred by a stirring blade 7b rotated by a waste oil stirring motor 7a. The agitated waste oil is supplied to the mixer 17 through the oil supply pipe 8 and the open / close valves 9 to 11 by the pump 12. The amount of waste oil supplied to the mixer 17 is controlled by the pump 12 as described later. The flow meter 15 automatically monitors the flow rate of the waste oil flowing through the oil supply pipe 8 (supply amount).
The mixer 17 contains a Fujino spiral (filter medium), and the physical filtration function of this Fujino spiral is used to increase the ability to promote equal mixing of waste oil and heavy oil, thereby making it possible to refine fuel oil with stable quality. . Further, the fuel oil generated in this way is further sufficiently stirred and mixed to maintain a viscosity of a predetermined value or less, and can be supplied to the burner 13. ]
It is described.

JP 2010-991190 A

According to the invention of Patent Document 1, “the quality is achieved by directly introducing waste oil and petroleum-based fuel oil into a small mixer, mixing and stirring, and supplying the obtained mixed fuel oil to a burner to enable combustion. It can be supplied as an improved mixed oil, improving the combustion efficiency, reducing the supply equipment cost to the burner of waste oil and petroleum-based fuel oil and the operating cost, and realizing efficient refining and combustion of mixed fuel oil The small mixer that stirs and mixes waste oil and petroleum-based fuel oil is a component of the combustion device, and produces and stores a large amount of mixed fuel oil to create large boilers and other components. There is a problem that it is not suitable for supplying to a plurality of boilers.
The present invention has been made in view of the problems of the above-mentioned invention. A mixed liquid of heavy oil and waste oil is injected into a stirring tank with a single nozzle to mix and stir to produce a mixed fuel, and the manufactured mixing By separating the agitation function and the storage function of storing fuel in a storage tank, the production amount of mixed fuel can be increased, and the mixed fuel can be supplied to large boilers and multiple boilers. Separation of heavy oil and waste oil is re-stirred and regenerated by intermittently circulating the mixed fuel from the storage tank to the stirring tank, and a mixed fuel manufacturing apparatus and a manufacturing method capable of always supplying a homogeneous mixed fuel to the burner Is to provide.

The present inventor has solved the above problems by the following means.
(1) A heavy oil waste oil mixing device for producing a mixed fuel used when a mixed fuel obtained by mixing heavy oil and waste oil is supplied to a burner and burned,
An agitation tank that pressurizes a mixed liquid of heavy oil and waste oil and injects it from the upper nozzle to agitate and mix it into a mixed fuel;
A storage tank for storing the mixed fuel produced in the stirring tank;
A plurality of connecting pipes for sending the mixed fuel produced in the stirring tank to the storage tank;
A supply pipe attached to the storage tank for supplying the mixed fuel to the burner;
Taking into account that the mixed fuel stored in the storage tank is separated by the change over time due to the specific gravity difference between heavy oil and waste oil, take out the mixed fuel oil having different composition ratios from the top and bottom of the storage tank, A pressure-feed pump for refluxing the stirring tank;
A liquid level detection mechanism for detecting the remaining amount of the mixed fuel, which is reduced by supplying the burned fuel stored in the storage tank to the burner via the supply pipe and burning it, by the height of the liquid level;
When the liquid level detection mechanism detects that the liquid level of the mixed fuel in the connecting pipe has reached a predetermined lower limit height, a new amount of heavy oil and waste oil are newly recirculated from the storage tank. A fixed-quantity heavy oil tank and a fixed-quantity waste oil tank for recovering the reduced amount of mixed fuel, sent to the agitation tank in addition to the fuel;
A heavy oil waste oil mixing device comprising:

  (2) The agitation tank is a cylindrical body with a hemispherical bottom, and is suspended from a lower rectification plate of an upper and lower double rectification plate that forms a lid of the agitation tank. An introduction pipe penetrating the double rectifying plate and introducing a mixed liquid of heavy oil and waste oil sent from the pressure pump is suspended, and the diameter of the drilled hole of the lower rectifying plate is the introduction pipe The piercing hole is provided with a short tube rectifying cylinder that is open at both ends toward the bottom, and the inside of the stirring tank passes through a gap between the rectifying cylinder and the introduction pipe. The heavy oil waste oil mixing apparatus according to (1), wherein the produced mixed fuel is led out to a space between the double rectifying plates.

  (3) The storage tank is a funnel-shaped container having a reduced shape on the lower side, and an injection pipe for injecting mixed fuel sent from the stirring tank through a connecting pipe is provided in the center of the upper surface of the storage tank. In the upper side wall and the bottom of the storage tank, the composition of the upper layer and the lower layer is separated by separation of heavy oil and waste oil due to aging of the stored mixed fuel. Each of the mixed fuels having different ratios is taken out, sent to a pressure pump, refluxed to the agitation tank, and connected to a liquid extraction pipe for regeneration to a homogeneous mixed fuel oil. Further, the injection pipe is connected to the side wall of the storage tank. The heavy oil waste oil mixing device according to (1) or (2), wherein a supply pipe for supplying the stored mixed fuel to the burner is provided at a portion corresponding to the depth position where the is inserted.

(4) The liquid level detection mechanism detects the fullness of the mixed fuel in the storage tank by the height of the liquid level, and the upper end of the side surface of the storage tank can be visually monitored and adjusted. A liquid amount adjusting unit formed by expanding a part of a pipe body raised from a part of the liquid, and a liquid level of the liquid amount adjusting unit by reducing the supply of the mixed fuel stored in the storage tank to the burner The heavy oil waste oil according to any one of (1) to (3), comprising a liquid level high / low limit sensor that detects that the height has dropped to a predetermined lower limit value and generates a signal. Mixing equipment.
(5) Quantitative heavy oil in which a predetermined amount of heavy oil and waste oil are respectively stored in advance in accordance with a signal generated by the liquid level height lower limit sensor detecting that the liquid level height of the liquid amount adjusting unit has decreased to the lower limit value. The solenoid valve provided at the supply port of the tank and the fixed waste oil tank is opened, and heavy oil and waste oil are pumped together with the mixed fuel recirculated from the storage tank by the pressure feed pump to produce the reduced amount of mixed fuel The heavy oil waste oil mixing device as set forth in (4), wherein the heavy oil waste oil mixing device is configured to be replenished.

(6) A method of mixing heavy oil and waste oil using the heavy oil waste oil mixing device according to any one of (1) to (5),
During new operation a. A first step of filling the storage tank (3) by injecting heavy oil and waste oil at a fixed ratio from a raw material inlet provided in the upper part of the storage tank); b. A second step of replenishing only a certain amount of heavy oil into the fluid amount adjusting unit from a supply port provided at the top of the liquid amount adjusting unit;
c. Open the on-off valve provided on the upper side wall of the storage tank, the on-off valve (23) provided on the bottom of the storage tank, and the on-off valve provided on the input side of the pressure feed pump (5). Nozzle provided in the introduction pipe, with the heavy oil and waste oil injected in a separated state in the storage tank being sucked and taken out through a liquid extraction pipe provided on the upper side wall and bottom of the storage tank, and pumped to the stirring tank A third step of jetting into the agitation tank from above, stirring and mixing, and refluxing to the storage tank via the connecting pipe;
d. By repeating the third step, the fuel oil and waste oil injected in the state of being separated into the initial storage tank are sequentially mixed to fill the storage tank with a homogeneous mixed fuel, and the mixed fuel is supplied to the burner. A fourth step to keep it in a possible state;
A method of mixing heavy oil and waste oil, characterized by comprising:

(7) In consideration of the fact that the mixed fuel filled in the storage tank in the fourth step is separated from heavy oil and waste oil due to changes over time, and it becomes impossible to secure supply of homogeneous mixed fuel to the burner. The pumping pump stopped after completion is driven every time a certain period of time elapses, and the upper and lower mixed fuels having different composition ratios of heavy oil and waste oil are sucked out and agitated, as in step 3. The method for mixing heavy oil and waste oil according to (6), further comprising a fifth step of recovering and maintaining the homogeneity by circulating to a tank.
(8) The liquid level height of the liquid amount adjusting unit is a predetermined lower limit value as the mixed fuel filled in the storage tank in the fourth step is supplied to the burner from the supply pipe provided on the outer wall of the storage tank. When the level drops, the signal generated by the liquid level high / low limit sensor that detects this will alternately open the fixed heavy oil tank and the fixed waste oil tank that have previously stored a fixed amount of heavy oil and a fixed amount of waste oil with a time difference. In addition, heavy oil and waste oil are alternately sent to the agitation tank via a pressure pump, and both solenoid valves are controlled to be closed after a lapse of a certain amount of time. The heavy oil and waste oil according to (6) or (7), wherein the heavy oil tank and the fixed waste oil tank further include a sixth step in which a fixed amount of heavy oil and waste oil are externally replenished from the outside. Mixing method.

The following effects are exhibited by the heavy oil waste oil mixing apparatus of the present invention and the method of mixing heavy oil and waste oil using the apparatus.
<1> The heavy oil waste oil mixing device of the present invention comprises:
An agitation tank that pressurizes a mixed liquid of heavy oil and waste oil and injects it from the upper nozzle to agitate and mix it into a mixed fuel;
A storage tank for storing the mixed fuel produced in the stirring tank;
A plurality of connecting pipes for sending the mixed fuel produced in the stirring tank to the storage tank;
A supply pipe attached to the storage tank for supplying the mixed fuel to the burner;
Taking into account that the mixed fuel stored in the storage tank is separated by the change over time due to the specific gravity difference between heavy oil and waste oil, take out the mixed fuel oil having different composition ratios from the top and bottom of the storage tank, A pressure-feed pump for refluxing the stirring tank;
The remaining amount of the mixed fuel, which is reduced by supplying the fuel mixture stored in the storage tank to the burner through the supply pipe and burning it, is reduced to a predetermined lower limit value. A liquid level detection mechanism composed of a liquid level detection sensor for detecting rice fields,
When the liquid level detecting sensor detects that the liquid level of the mixed fuel in the liquid amount adjusting unit has decreased to a predetermined lower limit value, a certain amount of heavy oil and waste oil are newly recirculated from the storage tank. A fixed-quantity heavy oil tank and a fixed-quantity waste oil tank for recovering the reduced amount of mixed fuel, sent to the stirring tank in addition to the mixed fuel;
Because it consists of
It is possible to efficiently produce mixed fuel with this apparatus, to store the produced mixed fuel while maintaining its homogeneity, and to supply the homogeneous mixed fuel to the burner. In addition, because the agitation tank and storage tank are separated, the heavy oil waste oil mixing device that was directly connected to the burner and operated only when the burner was used can be operated even when the burner is not used, and a larger amount of mixing can be performed. Fuel can be manufactured and stored, and mixed fuel can be supplied to a large burner or a plurality of burners.

<2> The stirring tank is a cylindrical body with a hemispherical bottom, and is suspended from the upper and lower rectifying plates of the upper and lower double rectifying plates forming the lid of the stirring tank, An introduction pipe for introducing a mixed liquid of heavy oil and waste oil sent from the pressure pump through the double rectifying plate is provided, and the diameter of the drilled hole of the lower rectifying plate is the introduction pipe The piercing hole is provided with a short tube rectifying cylinder that is open at both ends toward the bottom, and the inside of the stirring tank passes through a gap between the rectifying cylinder and the introduction pipe. Since the manufactured mixed fuel is configured to be led out to the space between the double rectifying plates,
A liquid mixture of heavy oil and waste oil is jetted into a stirring tank from a nozzle provided in the introduction pipe, stirred and mixed in the stirring tank, reflected from the bottom surface of the hemispherical shape and blown up, and the rectifying cylinder and the introduction pipe Is smoothly led out to the space between the double rectifying plates through the gap between the two and the pressure inside the agitation tank is also increased, and the mixed fuel is promoted, and the mixed fuel is efficiently produced with a relatively simple structure. it can.

<3> The storage tank is a funnel-shaped container whose bottom is reduced, and an injection pipe for injecting mixed fuel sent from the agitation tank through the connecting pipe is formed in the center of the upper surface of the storage tank. It is inserted to a position near the center of the effective storage depth, and the composition ratio of the upper layer and the lower layer is separated from the heavy oil and waste oil by the secular change of the stored mixed fuel at the upper side wall and the bottom of the storage tank. Each of the different mixed fuels is taken out, sent to the pressure pump, returned to the agitation tank, connected to a liquid extraction pipe for regeneration to a homogeneous mixed fuel, and the injection pipe is inserted at the side wall of the storage tank Since a supply pipe for supplying the stored mixed fuel to the burner is provided in a portion corresponding to the depth position thus made,
The mixed fuel immediately after production is injected near the center of the effective storage depth of the storage tank, and can be supplied to the burner through the supply pipe from that position, and the composition of heavy oil and waste oil is separated by storage and heavy oil and waste oil are separated. It is taken out from the upper and lower parts of the storage tank where the ratio has changed and is returned to the agitation tank for agitation and mixed, constantly regenerated and maintained as a homogeneous fuel mixture, ensuring stable combustion of the burner. .

<4> A liquid level detection mechanism that detects the remaining amount of the mixed fuel by the height of the liquid level,
Liquid volume adjustment by expanding the diameter of a part of the tube raised from a part of the upper end of the side surface of the storage tank so that it can be visually monitored and adjusted whether the mixed fuel is always filled in the storage tank And a liquid level high / low limit sensor that generates a signal by detecting that the liquid level of the liquid amount adjusting unit has decreased to a predetermined lower limit height due to a decrease in supply of the mixed fuel stored in the storage tank to the burner. And a predetermined amount of heavy oil and waste oil respectively in advance according to a signal generated when the liquid level height lower limit sensor detects that the liquid level height of the liquid amount adjusting unit has decreased to a predetermined lower limit value. The solenoid valve provided at the supply port of the fixed quantity heavy oil tank and the fixed quantity waste oil tank to be stored is opened, and the heavy oil and waste oil are pumped together with the mixed fuel recirculated from the storage tank to the agitation tank by the pressure feed pump. Mixed fuel Which is configured to supply and granulated,
When the liquid level of the liquid amount adjusting unit is lowered to the lower limit, a certain amount of heavy oil and waste oil are automatically replenished from the fixed heavy oil tank and the fixed waste oil tank by a signal generated by the liquid level lower limit sensor. The fuel mixture can be increased, and it can be easily confirmed at any time whether the fuel tank is filled with the liquid amount adjusting unit. It is possible to provide a heavy oil waste oil mixing device capable of accurately dealing with the case where the fuel is not emitted and capable of stably supplying the mixed fuel.

<5> When the method for mixing heavy oil and waste oil using the heavy oil waste oil mixing device of the present invention is a new operation, a. A first step of filling the storage tank by injecting heavy oil and waste oil at a constant ratio from the raw material inlet provided in the upper part of the storage tank;
b. A second step of replenishing only a certain amount of heavy oil into the liquid amount adjusting unit from a supply port provided at the top of the fluid amount adjusting unit;
c. Open / close valve provided on the upper side wall of the storage tank, open / close valve provided on the bottom of the storage tank, and open / close valve provided on the input side of the pressure pump, and separated into the storage tank by operation of the pressure pump The heavy oil and waste oil injected in the above are sucked out through the liquid extraction pipes provided on the upper side wall and bottom of the storage tank, pumped to the stirring tank, and jetted into the stirring tank from the nozzle provided in the introduction pipe And a third step of stirring and mixing and returning to the storage tank via the connecting pipe;
d. By repeating the third step, the fuel oil and waste oil injected in the state of separation into the initial storage tank are sequentially mixed to fill the storage tank with a homogeneous mixed fuel, and the mixed fuel can be supplied to the burner. And a fourth step for maintaining the state,
In addition, in order to prevent the mixed fuel filled in the storage tank in the fourth step from being separated from heavy oil and waste oil due to a change over time, it becomes impossible to ensure supply of the homogeneous mixed fuel to the burner. The pumping pump stopped after completion is driven every time a certain period of time elapses, and the upper and lower mixed fuels having different composition ratios of heavy oil and waste oil are sucked out and agitated, as in step 3. Combined with the fifth step of circulating to the tank to restore and maintain its homogeneity,
Furthermore, as the mixed fuel filled in the storage tank in the fourth step is supplied to the burner from the supply pipe provided on the outer wall of the storage tank, the liquid level of the liquid amount adjusting unit decreases, When the liquid level drops to the lower limit, the solenoid valve of the fixed amount oil tank and the fixed amount waste oil tank that has previously stored a certain amount of heavy oil and a certain amount of waste oil are opened alternately with a time difference by the signal generated by the liquid level high and lower limit sensor. Heavy fuel oil and waste oil are alternately sent to the agitation tank via a pressure pump, and both solenoid valves are controlled to close after a certain period of time, and the fixed fuel oil tank is emptied due to the discharge of the stored heavy oil and waste oil. And the 6th step in which a certain amount of heavy oil and waste oil are replenished to the fixed waste oil tank from the outside respectively.
Except for the first step and the second step, except for the liquid level monitoring in the liquid amount adjusting unit, each step can be progressed by a time interval set in advance in a timer, and a method of mixing heavy oil and waste oil by substantial automation is provided. It can be provided and contributes to the improvement of work efficiency.

Sectional drawing for demonstrating the structure of the heavy oil waste oil mixing apparatus of this invention The top view (a) of the heavy oil waste oil mixing device of the present invention and the top view (b) of the upper current plate Sectional drawing which shows the structure of the stirring tank upper part of the heavy oil waste oil mixing apparatus of this invention Explanatory drawing of the mixing method of the heavy oil and waste oil using the heavy oil waste oil mixing apparatus of this invention (a) Explanatory drawing of 1st step, (b) Explanatory drawing of 2nd step Explanatory drawing of the mixing method of the heavy oil and waste oil using the heavy oil waste oil mixing apparatus of this invention (c) Explanatory drawing of 4th step, (d) Explanatory drawing of 5th step and 6th step

The heavy oil waste oil mixing apparatus of the present invention and the method of mixing heavy oil and waste oil using the same apparatus will be described with reference to the drawings of the embodiments.
1 is a cross-sectional view for explaining the structure of the heavy oil waste oil mixing apparatus of the present invention, FIG. 2 is a top view of the heavy oil waste oil mixing apparatus of the present invention, and a top view of the upper current plate, and FIG. 3 is a heavy oil waste oil mixing of the present invention. Sectional drawing for demonstrating the structure and effect | action of the stirring tank upper part of an apparatus, FIGS. 4-1 and FIGS. 4-2 are mixing in each step in the mixing method of the heavy oil and waste oil using the heavy oil waste oil mixing apparatus of this invention. It is explanatory drawing which shows the flow liquefied.
In the figure, 1 is a heavy oil waste oil mixing device, 2 is an agitation tank, 3 is a storage tank, 4 is a connecting pipe, 5 is a pressure pump, 6 is a quantitative heavy oil tank, 7 is a quantitative waste oil tank, 8 is an upper flow straightening plate, and 8a is a notch , 9 is a lower flow straightening plate, 9a is a stirring vessel mounting part, 10 is an introduction pipe, 11 is a nozzle, 12 is a flow straightening cylinder, 13 is an injection pipe, 14, 14 'are liquid discharge pipes, 15 is a supply pipe, 16 is Liquid level adjusting unit, 17 is a liquid level high / low limit sensor, 18 and 29 are electromagnetic valves, 20 is a raw material inlet, 21 is a replenishing port, 22, 23 and 24 are on-off valves, 25 and 26 are regulating valves, and 27 vent pipes , 28 is a burner, and 29 is a guide.

As shown in FIG. 1, the heavy oil waste oil mixing apparatus 1 of the present invention pressurizes a mixed liquid of heavy oil and waste oil and injects it from an upper nozzle 11 to stir and mix to produce a mixed fuel,
A storage tank 3 for storing the mixed fuel produced in the stirring tank 2;
A plurality of connecting pipes 4 for sending the mixed fuel produced in the stirring tank 2 to the storage tank 3;
Taking into account that the mixed fuel stored in the storage tank 3 is separated by a change with time due to the difference in specific gravity between heavy oil and waste oil, the mixed fuel having different composition ratios is taken out from the top and bottom of the storage tank 3. A pressure-feed pump 5 for refluxing the stirring tank 2;
A liquid level detection mechanism that detects the remaining amount of the mixed fuel that is reduced by supplying the burned fuel stored in the storage tank 3 to the burner 28 through the supply pipe 15 and burning the burned fuel 28 at the liquid level;
When the liquid level detection mechanism lowers the level of the mixed fuel to a predetermined lower limit value, a certain amount of heavy oil and waste oil are newly added to the mixed fuel returned from the storage tank 3 and added to the stirring tank 2. It consists of a fixed quantity fuel oil tank 6 and a fixed quantity waste oil tank 7 for recovering the amount of the mixed fuel that has been sent and reduced.

The stirring tank 2 is a cylindrical body having a hemispherical bottom surface, and is suspended from the lower rectifying plate 9 of the upper and lower double rectifying plates 8 and 9 forming the lid of the agitating tank 2, Is provided with an introduction pipe 10 which passes through the upper and lower double rectifying plates 8 and 9 and introduces a mixed liquid of heavy oil and waste oil sent from the pressure pump 5, and the lower rectifying plate 9. The diameter of the perforated hole is larger than the outer diameter of the introduction pipe 10, and a short-flow rectifying cylinder 13 having both ends opened downward is provided in the drilled hole. The mixed fuel produced in the agitation tank 2 flows out to the upper surface of the lower rectifying plate 9 through the gap between the upper rectifying plate 8 and flows on the lower rectifying plate 9 to flow through the lower rectifying plate 9. (See FIG. 3).
As a result, the liquid mixture of heavy oil and waste oil sent by the pressure pump 5 is injected into the stirring tank 2 from the nozzle 11 and stirred and mixed by the pressure of the jetted liquid and the impact, friction and turbulence caused by the flow. The mixed fuel that has been made into a mixed fuel is then circulated and refluxed from the storage tank 3 to the stirring tank 2 to maintain the homogeneity of the mixed fuel in which separation of heavy oil and waste oil proceeds.

The size of the agitation tank 2 may be appropriately selected according to the necessary amount corresponding to the purpose of use of the mixed fuel, and while preparing a plurality of agitation tanks 2 having different capacities, as shown in FIG. It is also preferable that a stirring tank mounting portion 9a made of a cylindrical body having an internal wall provided on the inner wall is suspended from the lower rectifying plate 9, and the stirring tank 2 is screwed onto the stirring tank mounting portion 9a.
In addition, the nozzle 11 disposed in the introduction pipe 10 has a flow rate and a flow rate of a mixed liquid of heavy oil and waste oil to be injected depending on the performance of the pressure feed pump 5 and the degree of squeezing of the introduction pipe 10 in the portion where the nozzle is disposed. Since it differs, it is preferable to select and use it appropriately according to the size and purpose of use of the heavy oil waste oil mixing device 1, and the flow and mixing conditions of the liquid in the agitation tank 2 also differ depending on the position of the tip of the nozzle 11. Therefore, it is also preferable that the nozzle 11 is disposed in the introduction pipe 10 through a mechanism that can adjust the tip position of the nozzle 11 up and down.
In addition, when the mixing of heavy oil and waste oil in the stirring tank 2 is incomplete, the larger specific gravity is collected near the center of the hemispherical bottom surface of the stirring tank 2, but is injected from the nozzle 11. Since the liquid is blown up by the pressure of the liquid to be stirred and mixed without staying at the bottom of the stirring tank 2, a homogeneous mixed fuel can be obtained.
Furthermore, since the flow straightening cylinder 12 is provided on the lower flow straightening plate 9 that covers the stirring tank 2, the liquid injected into the stirring tank 2 does not flow smoothly out of the stirring tank 2, but remains with pressure and flows. Increasing opportunities to stir and mix heavy oil and waste oil. The pressure in the stirring tank 2 varies depending on the ratio of the cross-sectional area of the gap between the flow straightening cylinder 12 and the introduction pipe 10 and the cross-sectional area of the injection port of the nozzle 11. It is preferable to set appropriately including performance and the like, and a cylindrical guide for preventing the gap interval between the rectifying pipe 12 and the introduction pipe 10 from becoming uneven due to the pressure generated by the liquid flowing through the gap. 29 (see FIG. 3B).

The mixed fuel in which heavy oil and waste oil are mixed in the agitation tank 2 is ejected from the gap between the introduction pipe 10 and the rectifying cylinder 13, rectified by the upper rectifying plate 8, and connected to the lower rectifying plate 9 and a plurality of connections. It is guided to the pipe 4 and sent to the storage tank 3. Therefore, the upper rectifying plate 8 has a substantially hemispherical shape so that the jetted mixed fuel easily flows down to the lower rectifying plate 9, and a substantially semicircular cut is formed in the vicinity of the outer periphery as shown in FIG. 2 (b). A plurality of 8a are provided. In this embodiment, the number is shown as eight, but the number is not limited to this.
The upper rectifying plate 8 is connected to the vent pipe 27, and the substantially semicircular cut 8a of the upper rectifying plate 8 is filled in the stirring tank 2 when the heavy oil waste oil mixing device is newly operated. The discharged air is discharged through the vent pipe 27, contributing to stable production of the mixed fuel.
Further, in the present embodiment, four connecting pipes 4 connecting the stirring tank 2 and the storage tank 3 are arranged at intervals of 90 degrees (see FIG. 2), but the number and arrangement thereof are not limited to this. Absent. However, if the number of the connecting pipes 4 is small, the flow of the mixed fuel in the connecting pipe 4 becomes fast and bubbles are easily generated. Therefore, it is preferable to provide at least four or more at equal intervals.

As shown in FIG. 1, the storage tank 3 is a funnel-shaped container having a reduced diameter on the lower side, and the mixed fuel sent from the stirring tank 2 through the connecting pipe 4 is injected into the center of the upper surface of the storage tank 3. The injection pipe 13 is inserted to a position near the center of the effective storage depth of the storage tank 3, and the upper side wall and the bottom of the storage tank 3 are separated from heavy oil and waste oil due to aging of the stored mixed fuel. Liquid take-out pipes 14 and 14 ′ for taking out mixed fuels having different composition ratios between the upper layer and the lower layer and sending them to the pressure pump 5, returning them to the stirring tank 2, and regenerating them into a homogeneous mixed fuel. Further, a supply pipe 15 for supplying the stored mixed fuel to the burner 28 is provided at a portion corresponding to the depth position where the injection pipe 13 is inserted on the side wall of the storage tank 3. Then, the liquid level of the liquid amount adjusting unit 16 is lowered from a part of the upper end of the side surface of the storage tank 3 by supplying the liquid amount adjusting unit 16 and the stored mixed fuel to the burner 28, and the liquid level is increased. A thin tube provided with a liquid level high / low limit sensor 17 that detects a drop to a predetermined lower limit value and generates a signal is separately started up.
The structure of the storage tank 3 is such that heavy oil and waste oil are separated due to aging of the mixed fuel, the smaller specific gravity moves from the upper layer part of the storage tank 3 to the liquid amount adjusting unit 16, and the larger specific gravity is The mixed fuel stirred and mixed in the stirring tank 2 is configured in consideration of moving to the lower layer of the storage tank 3, and the middle layer of the storage tank 3 is connected via the connecting pipe 4 and the injection pipe 13. A supply pipe 15 is also provided in the middle layer so that the mixed fuel that has been injected into the region and has not been separated in the middle layer can be supplied to the burner 28.
In addition, the bottom of the storage tank 3 is laid with a plurality of layers of small-diameter ceramic balls, and the flow rate of the mixed fuel having a large specific gravity and a large amount of components to the liquid outlet 14 'is controlled by the spread amount. When mixing with the extracted mixed fuel with a large amount of components having a small specific gravity, it is preferable that the composition ratio is appropriate.
Although not shown in the figure, the storage tank 3 is provided with a leg or a base, and a pan equipped with a liquid leak sensor is installed under the leg or the base to monitor the liquid leak and leak. Measures are taken to prevent leakage around the liquid.

Whether or not the mixed fuel is filled in the storage tank 3 is determined based on whether or not the liquid in the liquid amount adjusting unit 16 is a transparent tube that is raised from a part of the upper end of the side surface of the storage tank 3 and is partially expanded. This can be confirmed by visually monitoring the elevation of the surface. And the liquid level high-low limit which detects that the liquid level falls with the reduction | decrease by the supply to the burner 28 of the mixed fuel stored by the said storage tank 3, and has fallen to the predetermined lower limit, and emits a signal A sensor 17 is separately provided in the middle of the narrow tube raised from the side surface of the storage tank 3, and the liquid level lower limit sensor 17 indicates that the liquid level of the liquid amount adjusting unit 16 has decreased to the lower limit. By controlling the signal generated by detection, the solenoid valves 18 and 19 provided respectively at the supply ports of the fixed amount heavy oil tank 6 and the fixed amount waste oil tank 7 each storing a predetermined amount of heavy oil and waste oil are opened, and the heavy oil and The waste oil is configured to be replenished by the pressure feed pump 5 together with the mixed fuel recirculated from the storage tank 3 to the agitation tank 2 and replenished with a reduced amount of the mixed fuel. If the two solenoid valves 18 and 19 are opened at the same time, only the larger specific gravity may be discharged first. Therefore, the timers are set so that the solenoid valves 18 and 19 are alternately opened at predetermined intervals. Yes. Then, the heavy oil and waste oil in the fixed heavy oil tank 6 and the fixed waste oil tank 7 are respectively adjusted by the adjusting valves 25 and 26 so that all the heavy oil and waste oil are discharged within a predetermined time. A timer is set so that both solenoid valves 18 and 19 close again after the passage.
In addition, a mesh is laid on the inner bottoms of the fixed heavy oil tank 6 and the fixed waste oil tank 7, and a plurality of ceramic balls are placed thereon, and when the mixing ratio of the mixed fuel heavy oil and waste oil is changed, This is done by changing the number of ceramic balls and changing the capacity of the heavy oil and waste oil stored in the fixed heavy oil tank 6 and the fixed waste oil tank 7. The total capacity of the heavy oil and waste oil stored in the fixed heavy oil tank 6 and the fixed waste oil tank 7 is substantially equal to the volume between the upper limit value and the lower limit value of the liquid level of the liquid amount adjusting unit 16. Accordingly, since the liquid level of the liquid amount adjusting unit 16 does not rise above the upper limit value, the fixed heavy oil tank 6 and the fixed waste oil tank 7 are higher than the upper limit value of the liquid amount adjusting unit 16. If it arrange | positions, since the backflow of heavy oil and waste oil can be prevented, it is preferable.

The method for mixing heavy oil and waste oil using the heavy oil waste oil mixing device of the present invention is as follows.
a. First, in a first step, heavy oil and waste oil are injected at a ratio of 2: 7 to 3: 7 from the raw material inlet 20 provided in the upper part of the storage tank 3 to fill the storage tank 3 [FIG. 4A (a). reference],
b. Next, as a second step, only a certain amount of heavy oil is replenished into the liquid amount adjusting unit 16 from a supply port 21 provided in the upper part of the liquid amount adjusting unit 16 [see FIG. 4 (b)]. This replenishment amount is set to an amount equal to the sum of the capacities of heavy oil and waste oil stored in the fixed heavy oil tank 6 and the fixed waste oil tank 7.
c. As Step 3, the on-off valves 22 and 23 provided on the upper side wall and the bottom of the storage tank 3 and the on-off valve provided on the input side of the pressure feed pump 5 are opened, the pressure feed pump 5 is operated, and the storage tank 3 The heavy oil and waste oil injected into the upper layer and the lower layer due to the difference in specific gravity are sucked and taken out via the liquid take-out pipes 14 and 14 ′ provided on the upper side wall and the bottom of the storage tank 3. It is pumped into the stirring tank 2 as a mixed liquid with waste oil, and is jetted into the stirring tank 2 from the nozzle 11 provided in the introduction pipe 10. However, in the new operation, the inside of the agitation tank 2 is empty, and the mixing activity is not active until the mixed liquid of the ejected heavy oil and waste oil fills the agitation tank 2, and the liquid amount adjusting unit 17 The liquid level continues to descend and exceeds the lower limit. If the lower limit value is exceeded, the liquid level high / low limit sensor 17 generates a signal and the heavy oil and waste oil are replenished from the fixed heavy oil tank 6 and the fixed waste oil tank 7, but depending on the capacity of the agitation tank 2, this replenishment does not catch up, There is also a possibility that the state below the value will continue. Therefore, it is preferable to continue to supply heavy oil from the supply port 21 during this period. In this case, since the ratio of heavy oil and waste oil deviates from a predetermined value, the ratio of heavy oil and waste oil initially injected into the storage tank 3 is added to the volume of the storage tank 3 as well as the volume of the stirring tank 2. It is preferable that the amount of waste oil is increased and injected into the storage tank 3 by an amount corresponding to heavy oil to be replenished later.
When the agitation tank 2 is filled with liquid, the mixed liquid of heavy oil and waste oil ejected from the nozzle 11 into the agitation tank 2 is agitated and mixed and sequentially mixed, and the storage tank is connected via the connecting pipe 4. Returned to 3.
d. By repeating the above step c, that is, the operation of sending the liquid stored in the storage tank 3 to the agitation tank 2 by the pressure-feed pump 5 and agitating / mixing to make a mixed fuel and returning it to the storage tank 3, When the heavy oil and waste oil injected in the state of being initially separated into the tank 3 becomes a homogeneous mixed fuel and fills the storage tank 3, the pressure pump 5 is stopped and can be supplied to the burner [FIG. 4]. -2 (c)].

  e. When the pump 3 is stopped after the storage tank 3 is filled with the homogeneous mixed fuel and the circulation between the storage tank 3 and the agitation tank 2 is stopped, the mixed fuel stored in the storage tank 3 changes with time. In view of the fact that the separation proceeds and the supply of the homogeneous mixed fuel to the burner 28 cannot be secured, the pump 5 is restarted every time a fixed time elapses after the pump 5 is stopped. The stored mixed fuel is circulated to the stirring tank 2 to regenerate and maintain its homogeneity. The reason why the mixed fuel is regenerated by the intermittent operation of the pressure pump 5 is to suppress the power consumption of the pressure pump 5.

f. After the storage tank 3 is filled with homogeneous mixed fuel and the pumping pump 5 is stopped, the mixed fuel stored in the storage tank 3 is supplied to the burner 28 from the supply pipe 15 provided on the outer wall of the storage tank 3. Along with this, the liquid level of the liquid amount adjusting unit 16 decreases. When this liquid level height falls to a predetermined lower limit value, electromagnetic signals of a fixed quantity heavy oil tank 6 and a fixed quantity waste oil tank 7 that store a predetermined amount of heavy oil and a predetermined amount of waste oil in advance by a signal generated by a liquid level high / low limit sensor. The valves 18 and 19 are opened alternately with a time difference, and heavy oil and waste oil are alternately sent to the stirring tank 2 via the pressure pump 5 [see FIG. 4-2 (d)], and both solenoid valves 18 , 19 are controlled so as to be closed after a lapse of a predetermined time, and a fixed amount of heavy oil and waste oil are replenished to the fixed amount heavy oil tank 6 and fixed amount waste oil tank 7 from the outside, respectively.
Fig. 4-2 (d) schematically shows that the heavy oil and waste oil supplied from the fixed heavy oil tank 6 and the fixed waste oil tank 7 are replenished alternately with a certain time difference. It does not show the actual drop or supply form of heavy oil or waste oil.

1: Heavy oil waste oil mixing device 2: Stirring tank 3: Storage tank 4: Connection pipe 5: Pressure feed pump 6: Fixed heavy oil tank 7: Fixed waste oil tank 8: Upper rectifying plate 8a: Notch 9: Lower rectifying plate 9a: Agitating tank attached Part 10: Introducing pipe 11: Nozzle 12: Rectifying cylinder 13: Injection pipe 14, 14 ': Liquid take-out pipe 15: Supply pipe 16: Liquid amount adjusting part 17: Liquid level high / low limit sensor 18, 19: Electromagnetic valve 20: Raw material injection port 21: Supply port 22, 23, 24: On-off valve 25, 26: Adjusting valve 27: Vent pipe 28: Burner 29: Guide

The heavy oil waste oil mixing apparatus of the present invention and the method of mixing heavy oil and waste oil using the same apparatus will be described with reference to the drawings of the embodiments.
1 is a cross-sectional view for explaining the structure of the heavy oil waste oil mixing apparatus of the present invention, FIG. 2 is a top view of the heavy oil waste oil mixing apparatus of the present invention, and a top view of the upper current plate, and FIG. 3 is a heavy oil waste oil mixing of the present invention. Sectional drawing for demonstrating the structure and effect | action of the stirring tank upper part of an apparatus, FIGS. 4-1 and FIGS. 4-2 are mixing in each step in the mixing method of the heavy oil and waste oil using the heavy oil waste oil mixing apparatus of this invention. It is explanatory drawing which shows the flow liquefied.
In the figure, 1 is a heavy oil waste oil mixing device, 2 is an agitation tank, 3 is a storage tank, 4 is a connecting pipe, 5 is a pressure pump, 6 is a quantitative heavy oil tank, 7 is a quantitative waste oil tank, 8 is an upper flow straightening plate, and 8a is a notch , 9 is a lower flow straightening plate, 9a is a stirring vessel mounting part, 10 is an introduction pipe, 11 is a nozzle, 12 is a flow straightening cylinder, 13 is an injection pipe, 14, 14 'are liquid discharge pipes, 15 is a supply pipe, 16 is Liquid level adjusting unit, 17 is a liquid level high / low limit sensor, 18 and 19 are solenoid valves, 20 is a raw material inlet, 21 is a replenishing port, 22, 23 and 24 are on-off valves, 25 and 26 are regulating valves, and 27 vent pipes , 28 is a burner, and 29 is a guide.

Claims (8)

A heavy oil waste oil mixing device (1) for producing a mixed fuel used when a mixed fuel obtained by mixing heavy oil and waste oil is supplied to a burner (28) and burned,
An agitation tank (2) that pressurizes a liquid mixture of heavy oil and waste oil and injects the mixture from the upper nozzle (11) to agitate and mix to form a mixed fuel;
A storage tank (3) for storing the mixed fuel produced in the stirring tank (2);
A plurality of connecting pipes (4) for sending the mixed fuel produced in the stirring tank (2) to the storage tank (3);
A supply pipe (15) attached to the reservoir (3) for supplying mixed fuel to the burner (28);
Considering that the mixed fuel stored in the storage tank (3) separates with time due to the difference in specific gravity between heavy oil and waste oil, the composition ratio differs from the top and bottom of the storage tank (3). A pump (5) for taking out the mixed fuel oil and refluxing it to the agitation tank (2);
Liquid that detects the remaining amount of the mixed fuel, which is decreased by supplying the burned fuel stored in the storage tank (3) to the burner (28) through the supply pipe (15) and burning it, at the level of the liquid level. A surface detection mechanism;
When the liquid level detection mechanism detects that the liquid level of the mixed fuel in the connecting pipe (4) has reached a predetermined lower limit height, a new amount of heavy oil and waste oil are newly added to the storage tank (3 ) And the fixed fuel oil tank (6) and the fixed waste oil tank (7) for returning to the agitation tank (2) in addition to the mixed fuel refluxed from
A heavy oil waste oil mixing device comprising:   The agitation tank (2) is a cylindrical body having a hemispherical bottom surface, and is suspended from the lower rectification plate (9) of the upper and lower double rectification plates (8, 9) forming the lid of the agitation tank (2). An introduction pipe (10) for introducing a mixed liquid of heavy oil and waste oil fed from the pressure feed pump (5) through the upper and lower double rectifying plates (8, 9) in the upper central portion thereof And the diameter of the drilled hole of the lower rectifying plate (9) is larger than the outer diameter of the introduction pipe (10), and both holes are opened downward in the drilled hole. The short tube straightening cylinder (12) is provided, and the mixed fuel produced in the stirring tank (2) through the gap between the straightening cylinder (12) and the introduction pipe (10) is the double pipe. The heavy oil waste oil mixing device according to claim 1, wherein the heavy oil waste oil mixing device is configured to be led out to a space between the current plates (8, 9).   The storage tank (3) is a funnel-shaped container whose shape is reduced at the bottom, and the mixing tank is fed from the stirring tank (2) to the center of the upper surface of the storage tank (3) via the connecting pipe (4). An injection pipe (14) for injecting fuel is inserted to a position near the center of the effective storage depth of the storage tank (3), and the stored mixed fuel is stored in the upper side wall and bottom of the storage tank (3). The mixed fuels with different composition ratios in the upper layer and the lower layer are separated by separation of heavy oil and waste oil due to changes over time, respectively, sent to the pressure pump (5), refluxed to the stirring tank (2), and homogeneously mixed A liquid take-out pipe (14, 14 ') for regenerating the fuel oil is connected, and further stored in a portion corresponding to a depth position where the injection pipe (13) is inserted on the side wall of the storage tank (3). Supply pipe (15) for supplying the mixed fuel to the burner (28) is provided Heavy waste oil mixing apparatus according to claim 1 or 2 is characterized by comprising.   The liquid level detection mechanism detects the degree of fullness of the mixed fuel in the storage tank (3) by the height of the liquid level, and the storage tank (3) so that the height can be visually monitored and adjusted. A liquid amount adjusting unit (16) in which a part of the tube raised from a part of the upper end of the side surface is expanded, and a burner (28) of the mixed fuel stored in the storage tank (3) The liquid level adjustment unit (16) is configured to include a liquid level high / low limit sensor (17) for detecting that the liquid level height of the liquid amount adjusting unit (16) has been lowered to a predetermined lower limit due to a decrease due to supply. The heavy oil waste oil mixing apparatus according to any one of claims 1 to 3.   The liquid level lower limit sensor (17) stores a predetermined amount of heavy oil and waste oil in advance in accordance with a signal generated by detecting that the liquid level of the liquid amount adjusting unit (16) has decreased to the lower limit. The solenoid valves (18, 19) provided at the supply ports of the quantitative heavy oil tank (6) and the quantitative waste oil tank (7) are opened, and the heavy oil and waste oil are discharged from the storage tank (3) by the pressure pump (5). The heavy oil waste oil mixing device according to claim 4, wherein the fuel oil is mixed with the recirculated fuel and pumped into the agitation tank (2) to produce and supply a reduced amount of the mixed fuel. A method of mixing heavy oil and waste oil using the heavy oil waste oil mixing device according to any one of claims 1 to 5,
During new operation a. A first step of filling the storage tank (3) by injecting heavy oil and waste oil at a constant ratio from the raw material inlet (20) provided in the upper part of the storage tank (3); b. A second step of replenishing only a certain amount of heavy oil into the fluid amount adjusting unit (16) from a catching port (21) provided at the top of the liquid amount adjusting unit (16);
c. The open / close valve (22) provided on the upper side wall 5 of the storage tank (3), the open / close valve (23) provided at the bottom of the storage tank (3), and the input side of the pressure pump (5). Liquid provided on the upper side wall and bottom of the storage tank (3) by opening the on-off valve (24) and separating the heavy oil and waste oil injected into the storage tank (3) in a separated state by the operation of the pressure pump (5) The suction pipe (14, 14 ') is sucked and taken out, and is pumped to the stirring tank (2). The nozzle (11) provided in the introduction pipe (10) is ejected into the stirring tank (2) to stir and A third step of mixing and returning to the storage tank (3) via the connecting pipe (4);
d. Repeating the third step, the heavy oil and waste oil injected in the state of being separated into the initial storage tank (3) are sequentially mixed into a mixed fuel, and the storage tank (3) is filled with a homogeneous mixed fuel. A fourth step of enabling and maintaining the supply to the burner (28);
A method of mixing heavy oil and waste oil, characterized by comprising:   Considering that the mixed fuel filled in the storage tank (3) in the fourth step is separated from heavy oil and waste oil due to changes over time, and it becomes impossible to secure supply of the homogeneous mixed fuel to the burner (28), The pump (5) stopped after the completion of the fourth step is driven each time a certain period of time elapses after the stop, and the mixed fuel of the upper layer and the lower layer having different composition ratios of heavy oil and waste oil as in step 3 The method for mixing heavy oil and waste oil according to claim 6, further comprising a fifth step of suctioning and taking out and circulating to the stirring tank (2) to restore and maintain the homogeneity thereof. As the mixed fuel filled in the storage tank (3) in the fourth step is supplied to the burner (28) from the supply pipe (15) provided on the outer wall of the storage tank (3), the liquid amount adjusting unit When the liquid level height in (16) is lowered to a predetermined lower limit value, a fixed amount heavy oil tank that stores a predetermined amount of heavy oil and a predetermined amount of waste oil in advance according to a signal generated by the liquid level high / low limit sensor (17) that has detected it. (6) and the solenoid valve (18, 19) of the fixed waste oil tank (7) are opened alternately with a time difference, and heavy oil and waste oil are alternately sent to the stirring tank (2) via the pressure pump (5). In addition, both solenoid valves (18, 19) are controlled to be closed after a lapse of a predetermined time, and are further supplied to a fixed heavy oil tank (6) and a fixed waste oil tank (7) which are emptied due to discharge of stored heavy oil and waste oil. A certain amount of heavy oil and waste from outside There method of mixing fuel oil and waste oil according to claim 6 or 7, characterized by having together a sixth step to be replenished from outside.

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