JPH0522816B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a canned motor line homomixer.

[Conventional technology]

In recent years, various test results have confirmed that the use of emulsion fuel in combustors such as boilers and heating furnaces that use liquid fuel has a significant effect on energy saving and reducing exhaust gas pollution, and it is rapidly becoming popular.

The device for producing this emulsion fuel is configured to be built into the combustor oil supply line as shown in FIG. 6, for example, and when combustion starts, valves 1 and 2
is closed and the bypass valve 3 is opened, and fuel oil 4 such as C heavy oil is supplied through the conventional oil supply line from fuel tank 5a → fuel oil pump 6a → heater 7a → bypass valve 3 → combustor 8, and combustion is stabilized. Then, valves 1 and 2 are opened, bypass valve 3 is closed, and the fuel oil 4 is transferred from fuel tank 5a to fuel oil pump 6a to heater 7a to valve 1.
→While sending oil to the line homomixer 9,
Water 10 in water tank 5b → water pump 6b → heater 7
b→Valve 11→Water is sent to line homo mixer 9,
And if necessary, the emulsifier (surfactant) 12 is sent from the emulsifier tank 5c to the emulsifier pump 6c to the line homomixer 9, and the mixer 9 mixes and stirs the fuel oil 4 and water 10 to form emulsion fuel. 13 and is supplied to the line homomixer 9 → valve 2 → combustor 8.

Mixers used in the emulsion fuel manufacturing apparatus include injection mixers and static mixers, but compared to these mixers, the line homomixer 9 has a variable supply amount of fuel oil 4 and water 10 to the mixer. However, the degree of emulsion fuel conversion to 13 tends not to be affected that much.

This line homomixer 9 has mixing stirring blades 1
4a, 14b are mounted on a rotating shaft 15 and arranged in a mixing/stirring cylinder 16, and the rotating shaft 15 is mounted on bearings 18a, 18b, 18c via shaft seals 17, 17 of gland packing or mechanical seals. It is supported and connected to an electric motor 20 through a shaft coupling 19, and the electric motor 20 drives the mixing and stirring blades 14a and 14b.
By rotating the fuel oil pump 6a and water pump 6b, the fuel was pressurized to 10 to 30 kg/cm ² , heated to 80 to 150°C by heaters 7a and 7b, and supplied from supply ports 21 and 22. fuel oil 4
and water 10 are mixed and stirred to form an emulsion fuel 13
This is a configuration in which the fuel is oxidized and supplied to the combustor 8 from the exhaust port 23.

[Problem that the invention seeks to solve]

However, in the conventional line homomixer 9, the gland packing and mechanical seal shaft sealing part 17
Because of this, it is basically impossible to eliminate liquid leakage, and furthermore, the emulsion fuel 1 to the combustor 8 cannot be completely eliminated.
3. The fluid leakage increases due to pressure fluctuations associated with supply amount control, and this fluid leakage increases fuel consumption and pollutes the surrounding environment, and in rare cases, the leaked fuel may ignite and cause a fire. There is also.

Also, as mentioned above, fuel oil 4 and water 10 are 10 to 30
Since it is pressurized to Kg/cm ² and heated to 80 to 150°C and supplied to the line homomixer 9, the shaft sealing part 1 of the gland packing or mechanical seal is
7. It requires extremely expensive equipment for high temperature and high pressure.
Its lifespan was not fully satisfactory, and maintenance and inspection required a great deal of effort, time, and cost.

Incidentally, similar problems also occurred in line homomixers used for emulsifying paints, agricultural chemicals, etc., other than those used in the emulsion fuel production apparatus.

The present invention has been made in view of the above problems, and provides a canned motor line homomixer that eliminates the need for the shaft seal, essentially eliminates liquid leakage, and reduces equipment costs, operating costs, and maintenance costs. This is what we provide.

[Means for solving problems]

The configuration of the canned motor line homo mixer of the present invention is such that the mixing stirring blade of the line homo mixer is attached to the rotating shaft of the can motor, and the can motor and the line homo mixer are integrated in a liquid-tight manner. A liquid passage is formed through which at least one of two or more liquids mixed and stirred in the canned motor passes through the canned motor to cool the canned motor and lubricate the bearing.

[Effect]

When at least one of the two or more liquids mixed and stirred by the line homomixer flows through the liquid passage and passes through the canned motor, the canned motor is cooled and the bearings are lubricated.

The two or more liquids supplied to the line homomixer through the canned motor, directly, or both are mixed and stirred and emulsified by the mixing stirring blade rotated by the canned motor. .

The temperature of the liquid passing through the canned motor is increased by cooling the canned motor, so the viscosity of the liquid being mixed and stirred is reduced and the mixing and stirring action is promoted. The overall efficiency is improved when used in

In addition, the line homo mixer and the canned motor are integrally provided in a liquid-tight manner, and the seal portion is only a stationary seal portion without a rotating seal portion, that is, a gland packing or a shaft seal portion of a mechanical seal. Basically, there is no leakage.

〔Example〕

Next, an embodiment in which the present invention is applied to a mixer of the emulsion fuel manufacturing apparatus will be described based on the drawings.

In FIG. 1, numeral 30 denotes a canned motor line homomixer constructed by integrally providing a canned motor 31 and a line homomixer 32 in a liquid-tight manner, and a stator frame 34 is attached to the outer periphery of a stator 33 of the canned motor 31. stator can 3 on the inner periphery.
5 is closely inserted, and both edges thereof are attached to the stator frame 3.
4, and a rotor 36 facing the stator 33 is disposed inside the stator can 35.
A rotating shaft 37 is inserted and fixed into the inner periphery of the rotor 36, and a rotor can 38 is closely covered and welded to the outer periphery in a liquid-tight manner.

Further, the front flange portion 34 of the stator frame 34
A front bearing box 39a is attached to the rear flange portion 34b via an O-ring 40, and a rear bearing box 39b which also serves as an end cover is attached to the rear flange portion 34b in a fluid-tight manner via a gasket 41. Bearing boxes 39a, 39
Sleeves 43a, 43b and thrust collar 4 are attached to both slide bearings 42a, 42b, respectively.
The rotating shaft 37 is rotatably supported via 4a and 44b.

The line homo mixer 32 includes mixing and stirring blades 46a and 46b inserted and attached to a rotating shaft 37 protruding from one side of the canned motor 31, that is, from the front bearing box 39a side, with a rotating support plate 45 interposed therebetween.
and a mixing/stirring cylinder 47 arranged to cover the mixing/stirring blades 46a, 46b and the rotary support plate 45.
The front flange portion 3 of the stator frame 34 of the canned motor 31 is sandwiched between the front bearing box 39a and the front bearing box 39a.
4a in a liquid-tight manner.

Then, on the canned motor 31 side of the mixing and stirring cylinder 47, fuel oil 4 is supplied from the fuel oil tank 5a to the line homomixer 32 after being pressurized and heated by a fuel oil pump 6a and a heater 7a. A supply port 50 is provided, and the canned motor 3
1, that is, the rear bearing box 39b, is provided with a supply port 51 for supplying water 10 from a water tank 5b to the canned motor 31 through a valve 11, which is pressurized and heated by a water pump 6b and a heater 7b. So, the water 1
0 is the supply port 51 → rear plain bearing 42b → rear rotor chamber 52 → stator can 35 and rotor can 3
8 = 53 → the rotor chamber 54 → the front sliding bearing 42a and the inside of the canned motor 31, cooling the canned motor 31 and lubricating both the sliding bearings 42a, 42b, and then to the line homomixer 32. A liquid passage 55 is formed thereto.

Furthermore, an emulsion fuel 13 formed by mixing and stirring the fuel oil 4 and water 10 is sent to the tip of the mixing and stirring cylinder 47 through the valve 2 into the combustion chamber 8.
Further, as shown by the chain line, the emulsifier 12 is pressurized directly from the emulsifier tank 5c or by the emulsifier pump 6c, and the emulsifier 12 is supplied before and after the water pump 6b as necessary. , the rear bearing box 39b, the mixing and stirring cylinder 47, and other desired locations.

57 is a valve between the rotary support plate 45 and the mixing/stirring cylinder 47, and 3 is a bypass valve.

In the canned motor line homomixer 30 configured in this way, the fuel oil 4 is pressurized and heated from the fuel tank 5a by the fuel oil pump 6a and the heater 7a, and then supplied to the supply port 50 and from the water tank 5b. When the water 10 is pressurized and heated by the water pump 6b and the heater 7b and is supplied to the supply ports 51, the water 10 flows from the supply port 51 to the rear plain bearing 42b to the rear rotor chamber 52 to the stator can. Between 35 and rotor can 38 = 53 → front rotor chamber 5
4 → The liquid flows through the front sliding bearing 42a and the liquid passage 55, that is, it passes through the canned motor 31 while cooling the canned motor 31 and lubricating both the sliding bearings 42a and 42b, and reaches the line homomixer 32, where the fuel The oil 4 and the water 10 are mixed to form a mixing stirring blade 46 on the canned motor 31 side.
The fuel oil 4 and Water 10 is emulsified to generate emulsion fuel 13, and this emulsion fuel 13 is supplied to combustor 8 from outlet 56.

According to the configuration of the canned motor line homo mixer 30 of this embodiment, the seal part does not have a rotating seal part, that is, unlike the conventional line homo mixer 9, it is used for high temperature and high pressure and is extremely expensive. However, since there is no gland packing or mechanical seal shaft sealing part, and there is only a stationary sealing part, there is basically no liquid leakage. There is no risk of increased fuel consumption or contamination of the surrounding environment, and there is no risk of leaked fuel igniting and causing a fire. Maintenance and inspection are also extremely easy. Equipment costs, operating costs, and maintenance costs are low, and the total cost is significantly reduced. Improved.

In addition, the temperature of the water 10 passing through the liquid passage 55 is increased by cooling the canned motor 31, so when the water 10 is used in an emulsion fuel production apparatus as in this embodiment, the temperature increase is increased. Therefore, the overall efficiency of the device is improved because less thermal energy is required for the heater 7b, and in some cases, the heater 7b is not required. In addition, the viscosity of the liquid to be mixed and stirred is reduced, the mixing and stirring action is promoted, and the required power is also reduced.

By the way, in the above embodiment, the flow resistance of the liquid passage 55 passing through the inside of the canned motor 31 is relatively large, and the supply amount of the fuel oil 4 is 3 to 5 times as large as that of the water 10, and the viscosity is also high. Since the fuel oil 4 is extremely high and the flow path loss becomes considerably large, the fuel oil 4 is supplied to the supply port 50 on the line homomixer 32 side.
Although water 10 is supplied to each of the supply ports 51 on the side of the canned motor 31, when the amount of emulsion fuel 13 to be produced is small, that is, when the amount of fuel oil 4 and water 10 to be supplied is small, or when the fuel oil pump 6a If the capacity of the line homomixer 32 is sufficiently large, contrary to the above embodiment,
0 to water 10, and supply port 5 on the canned motor 31 side.
It is also possible to supply fuel oil 4 to the rear bearing box 39b as shown in FIG.
It is also possible to provide a supply port 50 for the fuel oil 4 and a supply port 51 for the water 10 in the fuel oil 4, and to allow both the fuel oil 4 and the water 10 to flow through the liquid passage 55 passing through the canned motor 31 and reaching the line homomixer 32. In this case, since the fuel oil 4 and the water 10 pass through the canned motor 31 while being mixed by rotation by the rotor 36, an effect of improving the mixing and stirring ability can be expected.

Next, FIG. 3 shows another embodiment, in which three mixing stirring blades 46 are used in the embodiment shown in FIG.
a, 46b, and 46c are rotating support plates 45, respectively.
It is inserted and attached to the rotating shaft 37 with a and 45b in between,
The mixing and stirring cylinder 47 is provided with the two rotating support plates 45a, 4.
5b, and the supply port 50 for the fuel oil 4 is located between the front bearing box 39a of the canned motor 31 and the rotary support plate 45a on the side of this bearing box 39a, and the supply port 51 for the water 10 is located between the A rear rotor chamber 52 of the canned motor 31 is provided respectively.
is an auxiliary impeller 5 attached to the rotating shaft 37.
8 is disposed in the canned motor 31, and an auxiliary pump 59 is driven by the canned motor 31.
are integrally constructed in a liquid-tight manner, and the rotating shaft 37
An in-shaft passage 60 communicating from the rear end to the inner diameter of the auxiliary impeller 58 is provided, and a through hole 62 is provided in the fastening bolt 61 of the rear sleeve 43b and thrust collar 44b, and one end of the circulation pipe 63 is connected to the inner diameter of the auxiliary impeller 58. A line homo mixer 32 is connected to the rear bearing box 39b at the other end between both rotational support plates 45a and 45b of the mixing stirring cylinder 47, and is integrally provided on one side of the canned motor 31 in a liquid-tight manner, and the other end of the canned motor 31. A part of the liquid mixture 64 of fuel oil 4 and water 10 that is being mixed and stirred in the line homomixer 32 is circulated from the line homomixer 32 by the action of the auxiliary pump 59. Passing through the pipe 63, the bolt passes through the bolt through hole 62 → the shaft passage 60 → the auxiliary impeller 58 → the rear rotor chamber 52, and from this rear rotor chamber 52, a portion returns to the bolt through hole 62 via the rear plain bearing 42b. , the rest is between the stator can 35 and the rotor can 38 53 → front rotor chamber 54 →
Front sliding bearing 42a → line homomixer 32
A liquid passage 55 is formed which circulates through the canned motor 31 while cooling the canned motor 31 and circulating both slide bearings 42a and 42b.

According to this embodiment, the line homomixer 32
A part of the mixed liquid 64 of the fuel oil 4 and water 10 that is being mixed and stirred in is circulated through the liquid passage 55 and passed through the canned motor 31. As in the case of each of the above embodiments in which the entire amount of either or both of the fuel oil 4 and the water 10 is passed through the canned motor 31, the amount of supply of the fuel oil 4 and the water 10, that is, the amount of generated emulsion fuel 13 is Mainly due to the flow resistance of the liquid passage 55 passing through the canned motor 31,
Therefore, the canned motor line homomixer 30 is not limited by the capacity of the fuel oil pump 6a or the water pump 6b and has a large mixing and stirring capacity.

In addition, in the embodiment shown in FIG.
As shown in the figure, a heat exchanger 65 is provided in the middle of the circulation pipe 63, and the water 10 to the line homomixer 32 is
If the water is supplied via the heat exchanger 65, that is, if the water 10 mixed and stirred with the fuel oil 4 is also used as cooling water for the heat exchanger 65, the circulation pipe 6
Since the temperature of the water 10 is raised by the mixed liquid 64 flowing through the heater 7b, less thermal energy is required for the heater 7b, or
is no longer necessary, and the mixed liquid 64 flowing into the canned motor 31 through the circulation pipe 63 is cooled by the water 10.
The cooling effect of No. 1 is improved. When the canned motor line homomixer 30 having the configuration of this embodiment is used as a mixer for a device other than an emulsion fuel production device, a relatively low-temperature liquid of two or more types of liquids to be mixed and stirred is used as the cooling liquid of the heat exchanger 65. It can be used for both purposes.

Next, FIG. 5 shows still another embodiment, in which the rotating shaft 37 of the canned motor 31 is not protruded from the canned motor 31 but is housed inside the canned motor 31, and the mixing stirring blades 46a, 46b are connected to the rotor of the canned motor 31. chamber 54 and rear rotor chamber 5
The stator can 35 of the canned motor 31, which corresponds to each of the mixing and stirring blades 46a and 46b, is attached to the mixing and stirring cylinder 47 of the line homomixer 32. The line homomixer 32 is also used
is configured in the canned motor 31,
That is, the line homo mixer 32 and the canned motor 31 are integrally provided in a liquid-tight manner, and the front bearing box 39a of the canned motor 31 is
The front bearing box 39a is provided with a discharge port 56 for the emulsion fuel 13, and the rear bearing box 39b is provided with a fuel oil 4 supply port 50 and a water 10 supply port. A mixed liquid 64 of fuel oil 4 and water 10 supplied from both supply ports 50 and 51 is mixed and agitated in the rear rotor chamber 52 and the front rotor chamber 54 by mixing stirring blades 46a and 46b. While moving inside the canned motor 31, the rear sliding bearing 42b → the rear rotor chamber 52 → the stator can 35 and the rotor can 3
8, a liquid passage 55 is formed which flows as follows: 53→front rotor chamber 54→front plain bearing 42a→discharge port 56 to cool the canned motor 31 and lubricate both the plain bearings 42a, 42b.

This embodiment is suitable for producing a relatively small amount of emulsion fuel, and since the line homomixer 32 is integrated into the canned motor 31,
It is possible to provide a canned motor line homomixer 30 that is smaller and more inexpensive.

The present invention has been described above with reference to an embodiment in which it is applied to a line homomixer of an emulsion fuel production device, but it can of course also be applied to a line homomixer that mixes and stirs two or more liquids, such as emulsifying paints and agricultural chemicals. The number and shape of the stirring blades are not limited to those in each of the above embodiments, and any suitable one may be used depending on the application, and the auxiliary pump is also not limited to the above embodiments, but may be integrated with the canned motor in a liquid-tight manner. It is sufficient if it is driven by a canned motor, and as for the bearing, in addition to a sliding bearing, a ball bearing can also be used depending on the liquid.

[Effects of the Invention] According to the canned motor line homomixer of the present invention, the seal part does not have a rotating seal part consisting of a gland packing or a shaft seal part of a mechanical seal, but only a stationary seal part, so basically There is no liquid leakage, so there is no loss due to liquid leakage, no contamination of the surrounding environment, and no risk of fire outbreak.Also, the temperature of the mixed and stirred liquid increases as it passes through the canned motor, so it is not mixed and stirred. The viscosity of the liquid is reduced, which promotes the mixing and stirring action, and requires less power, or when mixing and stirring liquids that have been heated to a raised temperature, such as in emulsion fuel production equipment, the heater requires less thermal energy. This improves the overall efficiency of the device, and especially when mixing and stirring high-temperature, high-pressure liquids like in the emulsion fuel production device, the gland packing and mechanical seals are expensive, have an unsatisfactory lifespan, and are extremely complicated to replace. Since no shaft seal is required, maintenance and inspection are extremely easy, and overall costs are significantly improved due to lower equipment costs, operating costs, and maintenance costs.

[Brief explanation of the drawing]

1 to 5 are longitudinal sectional front views showing different embodiments of the canned motor line homomixer of the present invention, and FIG. 6 is a longitudinal sectional front view of a conventional emulsion fuel production apparatus. 31... Canned motor, 32... Line homomixer, 37... Rotating shaft, 42a, 42b... Bearing, 4
6a, 46b, 46c...mixing stirring blade, 47...mixing stirring cylinder, 55...liquid passage, 59...auxiliary pump, 6
3...Circulation pipe, 65...Heat exchanger.

Claims (1)

[Scope of Claims] 1. A mixing and stirring blade of a line homo mixer is attached to the rotating shaft of the can motor, and the can motor and the line homo mixer are integrated in a liquid-tight manner, and the mixture is mixed and stirred by the line homo mixer. A canned motor line homomixer, characterized in that a liquid passage is formed through which at least one of two or more types of liquids passes through the canned motor to cool the canned motor and lubricate a bearing. 2. A mixing and stirring blade of a line homomixer is attached to the rotating shaft protruding from one side of the canned motor, and a mixing and stirring cylinder of the line homomixer that covers the mixing and stirring blade is attached to the canned motor in a liquid-tight manner,
A liquid passage is formed through which at least one of the two or more liquids to be mixed and stirred in the line homomixer is supplied from the other side of the canned motor, passed through the canned motor, and introduced into the line homomixer. Characteristic claim 1
Canned motor line homo mixer as described in section. 3. A mixing and stirring blade of a line homomixer is attached to the rotating shaft protruding from one side of the canned motor, and a mixing and stirring cylinder of the line homomixer that covers the mixing and stirring blade is attached to the canned motor in a liquid-tight manner,
An auxiliary pump driven by the canned motor is provided integrally in a liquid-tight manner, and the other side of the canned motor and the line homomixer are communicated through a circulation pipe, so that a part of the liquid mixture in the line homomixer is transferred to the auxiliary pump. 2. The canned motor line homo mixer according to claim 1, further comprising a pump forming a liquid passage through which the liquid passes through the canned motor and circulates to the line homo mixer via the circulation pipe. 4 A heat exchanger is provided in the middle of the circulation pipe, and a relatively low-temperature liquid among the two or more liquids mixed and stirred by the line homomixer is passed through the heat exchanger as a cooling liquid for the heat exchanger. The canned motor line homomixer according to claim 3, further comprising a liquid passageway for supplying liquid to the line homomixer. 5. A line homo mixer in which a mixing stirring blade attached to the rotating shaft of the canned motor is disposed in at least one of the front rotor chamber and the rear rotor chamber of the canned motor, and the stator can of the canned motor also serves as a mixing and stirring cylinder. is liquid-tightly configured in the canned motor, and all of the two or more liquids to be mixed and stirred by the line homomixer are supplied from one side of the canned motor, and the two or more liquids are mixed and stirred by the line homomixer while being mixed and stirred by the canned motor. 2. The canned motor line homomixer according to claim 1, further comprising a liquid passage through which the liquid passes through and is discharged from the other side of the canned motor.