JP2015004278A - Exhaust energy recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust energy recovery device that secures an air current acting on a wind turbine while holding an upward current as a source for power generation in a stable state and can thereby stably generate electric power with good efficiency.SOLUTION: An exhaust energy recovery device comprises: an exhaust tower 1 that exhaust air flows in from a low place and is emitted from to the atmosphere at a high place; an intake pipe 5 which is linked to a lower part of the exhaust tower and sucks the outside air with an upstream current of the exhaust air in the exhaust tower; a wind turbine 6 which is connected to an upstream side of the intake pipe to be rotated with the outside air current sucked by the intake pipe; and an electric generator 7 which is rotatably driven by the wind turbine.

Description

  The present invention relates to an exhaust energy recovery device, and in particular, an exhaust gas that recovers the thermal energy of the exhaust gas by generating power using the heat energy of the heated exhaust gas using the air flow of the heated exhaust gas. The present invention relates to an energy recovery device.

  In general, as an energy recovery device using gas fluidity, a large windmill is rotated using the natural wind as the gas, and the rotation of the windmill is transmitted to a generator to generate power. So-called wind power generation, which recovers the energy, is known.

  In wind power generation using such a windmill, natural wind is used, but since the volume and direction of the natural wind are not constant, the amount of power generation varies and the power supply is not stable. There is a problem.

  As a method for improving such a problem, for example, an energy recovery device as described in Patent Document 1 or Patent Document 2 has been proposed.

  In the former energy recovery device, a high-rise building is provided with a vertical air passage communicating from the lower floor part to the rooftop, an air intake is provided in the lower floor portion of this airway, and an opening is provided near the rooftop. A wind power generator and its rotating blades are installed for each predetermined floor in the air passage.

  When the air is heated air, the density of the air flowing into the air intake port of the air passage is smaller than that of the outside air, thereby generating buoyancy in the air and causing an updraft in the air passage. The rotating blades are rotated by the rising air current, and the wind power generator is configured to generate electric power using the rotation.

  Further, the latter energy recovery device is equipped with a spiral fan along its length in the chimney, and a generator is installed in an intake passage formed continuously in the lower part of the chimney, The rotation of the spiral fan is transmitted to the generator via a rotation transmission mechanism installed through the wall.

  And this technique also rotates the spiral fan provided in the chimney by the rising airflow of the heated air generated in the chimney, and transmits the rotation to the generator via the rotation transmission mechanism. Power generation.

  Any of these techniques is suitably applied to facilities that discharge heated gas, such as incineration facilities and thermal power generation facilities.

Utility Model Registration No. 3153015 JP 2009-121451 A

  However, the following points to be improved still remain in the above-described technique.

  That is, in any of the above-described techniques, since the rotating blades and the spiral fan are installed in the flow of the updraft from the air inlet (chimney) to the outlet, the large updraft is generated. In addition to resistance, this air flow is greatly disturbed, and the efficient rotation of the rotating blades and the spiral fan is impeded, and these rotations become unstable.

  As a result, there is a risk that the power generation efficiency is lowered or the power generation amount becomes unstable.

  In addition, by arranging the spiral fan or wind power generator in the air path (chimney), the size and weight of these devices are restricted by the shape of the air path or chimney, and the generator that can be used is restricted. Will be.

  Furthermore, since the gas that forms the above-described updraft is high temperature, in any of the above-described techniques, all of the equipment used for power generation is exposed to high temperature, and its durability is impaired, or , Become expensive equipment.

  In addition, when performing maintenance, inspection and replacement of equipment used for power generation, it is necessary to stop the operation of the facility provided in order to stop the inflow of exhaust gas to the air passage. There is also a concern that the operation rate of the facility may be reduced due to the suspension of the facility operation.

  The present invention has been made in view of such conventional problems, and ensures an airflow that acts on the power generation device while maintaining a rising airflow that is a source of power generation in a stable state, thereby improving efficiency. Perform stable power generation, avoid that the specifications of the equipment used for power generation are affected by the means for generating the updraft, and that the updraft directly affects the equipment used for power generation It is an object of the present invention to provide an exhaust energy recovery device that can prevent the above and improve its durability.

  In order to solve the above-described problem, an exhaust energy recovery apparatus of the present invention is an exhaust energy recovery apparatus that is provided in a facility that discharges heated exhaust and recovers thermal energy of the exhaust, An exhaust tower from which the exhaust flows from a low place and discharges the exhaust to the atmosphere at a high place; and an intake pipe which is communicated below the exhaust tower and sucks outside air by an upward flow of the exhaust in the exhaust tower; The wind turbine is connected to the upstream side of the intake pipe and is rotated by an external air flow sucked by the intake pipe, and a generator driven to rotate by the wind turbine.

  With this configuration, when an updraft is generated in the exhaust tower, outside air is sucked through the intake pipe at a low portion of the exhaust tower so as to be drawn into the flow.

  Here, by providing a windmill and a generator used for power generation upstream of the intake pipe for sucking the outside air, the windmill is rotated by the airflow of the outside air drawn through the intake pipe. At the same time, power is generated by the generator.

  Therefore, the thermal energy of the exhaust from the facility is recovered as electric energy by the power generation by the generator.

  The exhaust gas only rises in the exhaust tower and does not directly act on the windmill or the generator, and the exhaust tower has resistance to the exhaust flow. There is no.

  As a result, the ascending air current is kept in a constant and uniform flow, while the resistance from the exhaust tower is always kept constant.

On the other hand, since the ascending airflow is maintained in a stable state as described above, the flow of outside air in the intake pipe drawn in by this is also stabilized.
Accordingly, the rotation of the windmill and the operation of the generator that are operated by the airflow of the outside air are stabilized, and a stable power generation amount can be ensured.

  Since the windmill and generator used for the power generation are provided apart from the exhaust tower via the intake pipe, the shape of these devices is not affected by the shape of the exhaust tower. The wind turbine and the generator can be created based on free specifications.

  Further, even when the temperature of the ascending air current is high, the ascending air current does not directly act on the wind turbine or the generator, so that the durability of the wind turbine or the generator is not impaired. .

  Therefore, the soundness of the exhaust energy recovery device can be maintained over a long period of time, and the exhaust gas temperature can be raised as much as possible to easily improve the power generation efficiency and increase the power generation amount.

  Furthermore, it is necessary to stop the air flow in the equipment sucked into the exhaust tower when performing maintenance, inspection or replacement work for the equipment such as the windmill and the generator. Even in this case, it is not necessary to stop the flow of exhaust gas in the exhaust tower.

  Therefore, the above-described operation can be performed without stopping the operation of the facility provided side by side, and the operation rate of this facility is not affected.

  As a preferred embodiment of the present invention, a clutch mechanism that connects and disconnects the wind turbine and the generator is provided.

  By adopting such a configuration, it is possible to perform maintenance / inspection work or replacement work of the generator without stopping the rotation of the windmill by releasing the connection state between the windmill and the generator. Can do.

  Further, as a preferred embodiment of the present invention, a speed change mechanism for changing the speed of the windmill and transmitting it to the generator may be provided between the windmill and the generator.

  With such a configuration, the rotational force of the windmill transmitted to the generator is adjusted by the speed change mechanism, and the rotational force generated in the windmill and the load on the generator are appropriately adjusted. can do.

  Thereby, the rotational force generated in the windmill can be converted into a driving force optimal for driving the generator, and efficient power generation can be performed.

  According to the present invention, a stable airflow acting on a windmill is secured while maintaining an updraft that is a source of power generation in a stable state, and thereby efficient and stable power generation is performed. The specifications of the equipment to be used are not affected by the means for generating the updraft, and further, the updraft is prevented from acting directly on the equipment used for power generation, thereby improving its durability. It is possible to provide an exhaust energy recovery device that can perform the operation.

It is the perspective view which carried out the cross section of a part which shows the whole structure of one Embodiment of this invention. It is the perspective view which carried out the cross section of a part which shows the whole structure of other embodiment of this invention. It is the perspective view which carried out the cross section of a part which shows the whole structure of other embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a perspective view showing the overall configuration of an embodiment of the present invention, an exhaust tower 1 that is provided in a facility B that exhausts heated exhaust and generates an upward airflow from the exhaust, and the exhaust tower 1 And a power generation unit 2 connected to the lower portion of the power generation unit 2.

  The facility B is, for example, an incineration facility, a thermal power generation facility, or the like, and is communicated with the lower part of the exhaust tower 1 by an exhaust duct D.

  The exhaust tower 1 is provided at its lower part with an intake part 3 to which one end of the exhaust duct D extending from the facility B is connected, and at the upper end, an exhaust part 4 opened to high outside air. Is provided.

  The power generation unit 2 is connected to a lower portion of the exhaust tower 1 in a state of being in communication with the inside of the exhaust tower 1 and extends to the outside of the exhaust tower 1. The pipe 5 is provided with a windmill 6 connected outside the exhaust tower 1 and a generator 7 that is rotationally driven by the windmill 6.

  Inside the exhaust tower 1, an orifice portion Z formed by gradually narrowing the inner diameter of the exhaust tower 1 is provided above the intake portion 3, and the intake pipe corresponds to the orifice portion Z. One end of 5 is attached.

  That is, the intake pipe 5 is laid and pierced through a portion of the peripheral wall of the exhaust tower 1 between the orifice portion Z and the intake portion 3, and one end thereof is formed at the center of the exhaust tower 1. While being bent toward the exhaust part 4, the tip part is positioned in the vicinity of the minimum diameter part of the orifice part Z.

  The wind turbine 6 connected to the intake pipe 5 is rotatably mounted in a casing 8. The casing 8 is provided with a wind introduction pipe 9 that draws outside air into the casing 8. In addition, the wind introduction tube 9 is provided with a filter 10 for removing dust and the like contained in the outside air to be drawn.

  The outside air drawn into the casing 8 through the wind introduction pipe 9 is drawn into the exhaust tower 1 from the intake pipe 5 after acting on the wind turbine 6 in the casing 8. The wind turbine 6 is rotated while the outside air passes through the casing 8.

  In the present embodiment, a rotation transmission mechanism 11 including a clutch mechanism and a speed change mechanism is interposed between the windmill 6 and the generator 7. The clutch mechanism causes the windmill 6 and the generator 7 to be interposed. In addition, the rotation of the wind turbine 6 is shifted and transmitted to the generator 7 by the speed change mechanism.

  In the present embodiment, the power generation unit 2 is configured by the intake pipe 5, the wind turbine 6, the generator 7, the casing 8, the wind introduction pipe 9, the filter 10, and the rotation transmission mechanism 11.

  In the exhaust energy recovery apparatus according to this embodiment configured as described above, the heated exhaust exhausted from the facility B is caused to flow downward inside the exhaust tower 1 through the exhaust duct D and the intake section 3. It is done.

  As described above, when the heated exhaust gas flows into the lower portion of the exhaust tower 1, the density of the exhaust gas is reduced due to heat, and the exhaust gas is reduced by the buoyancy generated due to this. As a result, an updraft is generated in the exhaust tower 1.

  Here, the exhaust tower 1 does not have a member that resists the flow of the above-described updraft inside the exhaust tower 1, and thus a uniform updraft is generated.

  Thus, when an ascending airflow is generated in the exhaust tower 1, when the rising gas passes through the orifice part Z (shown by a solid line arrow in FIG. 1), a pressure drop is generated in the orifice part Z. As a result, a negative pressure region having a pressure lower than the atmospheric pressure is formed in the orifice portion Z.

  When the orifice part Z is in a negative pressure state in this way, a negative pressure is applied to the tip of the intake pipe 5 positioned in the vicinity of the orifice part Z, and the gas in the intake pipe 5 is transferred to the exhaust tower. 1 (indicated by a broken line arrow in FIG. 1) and is discharged from the exhaust unit 4 to the outside air while generating an upward air flow with the gas inside.

  When the gas in the intake pipe 5 is sucked into the exhaust tower 1, the pressure in the casing 8 is reduced accordingly. Therefore, the filter 10 and the wind introduction are introduced into the casing 8. Outside air is sucked through the tube 9.

  As a result, an air flow from the filter 10 to the exhaust tower 1 through the wind introduction pipe 9, the casing 8, and the intake pipe 5 is generated, and the wind turbine 6 is rotated by the gas flowing in the casing 8, The rotation of the wind turbine 6 is transmitted to the generator 7 through the rotation transmission shaft 11, whereby the generator 7 is rotationally driven to generate power.

  As a result, the heat energy of the exhaust is converted into electric power generated in the generator 7 and recovered.

  In this embodiment, the exhaust tower 1 and the power generation unit 2 are connected via an intake pipe 5, and main components of the power generation unit 2 are installed independently from the exhaust tower 1. .

  As a result, the power generation unit 2 can be manufactured based on independent specifications regardless of the shape and dimensions of the facility B and the exhaust tower 1, and the design freedom is extremely high. It can be set as the exhaust energy recovery device of specifications.

By the way, in this embodiment, the rotation transmission mechanism 11 provided with the clutch mechanism is provided between the windmill 6 and the generator 7.
Even when the windmill 6 is in a rotating state, this clutch mechanism can block the rotation transmission between the windmill 6 and the generator 7. The work can be performed without being influenced by the operating state of the wind turbine 6.

The rotation transmission mechanism 11 includes a speed change mechanism.
The speed change mechanism is configured to change the rotation of the wind turbine 6 and transmit it to the generator 7. By appropriately setting the speed ratio, the driving force applied from the wind turbine 6 to the generator 7 is changed. Can be adjusted to an appropriate value to stabilize the operating state of the generator 7.

  Furthermore, it is necessary to stop the air flow in the equipment sucked into the exhaust tower when performing maintenance, inspection or replacement work for the equipment such as the windmill and the generator. Even in this case, it is not necessary to stop the flow of exhaust gas in the exhaust tower.

  Therefore, the above-described operation can be performed without stopping the operation of the facility provided side by side, and the operation rate of this facility is not affected.

  Note that the shapes, dimensions, and the like of the constituent members shown in the above embodiment are merely examples, and various changes can be made based on design requirements and the like.

  For example, in the above-described embodiment, the tip of the intake pipe 5 is bent upward at the center of the exhaust tower 1 so that the tip is positioned at the orifice Z. Instead of this, as shown in FIG. 2, it is also possible to install the tip of the intake pipe 5 so as to open to the minimum diameter portion of the orifice portion Z.

  Further, as shown in FIG. 3, the exhaust tower 1 is constituted by an inner tower 1 a continuous with the exhaust duct D, and an outer tower 1 b provided so as to surround the inner tower 1 a with a space S therebetween. In addition, the intake pipe 5 may be connected to the lower portion of the outer tower 1b.

  In this embodiment, the heated gas discharged from the facility B flows into the inner tower 1a from the exhaust duct D through the intake section 3 provided at the lower part of the inner tower 1a, and by the heat It rises and is discharged from the exhaust part 4 to the outside air.

  And while the said heating gas raises the inside of the said inner tower 1a, the gas in the said space S is warmed through the wall surface of this inner tower 1a, and thereby an upward airflow is produced in the said space S.

  Due to the rising air flow in the space S, the outside air is sucked in through the intake pipe 5 connected to the outer tower 1b, and then pushed upward, and is discharged from the exhaust unit 4 to the outside air.

  The wind turbine 6 is rotated and the generator 7 generates electric power by the flow of outside air sucked through the intake pipe 5.

  And since the exhaust tower 1 which consists of the inner tower 1a mentioned above and the outer tower 1b is a general chimney structure, energy recovery is achieved by connecting the power generation unit mentioned above to the lower part of the existing outer tower 1b. The device can be easily constructed.

DESCRIPTION OF SYMBOLS 1 Exhaust tower 1a Inner tower 1b Outer tower 2 Power generation unit 3 Intake part 4 Exhaust part 5 Intake pipe 6 Windmill 7 Generator 8 Casing 9 Wind introduction pipe 10 Filter 11 Rotation transmission mechanism B Facility D Exhaust duct S Space Z Orifice part

In order to solve the above-described problem, an exhaust energy recovery apparatus of the present invention is an exhaust energy recovery apparatus that is provided in a facility that discharges heated exhaust and recovers thermal energy of the exhaust, An intake pipe that introduces outside air is connected to a lower part of an exhaust tower that is provided in the facility and discharges the exhaust discharged from the facility at a high place, and the outside air flowing through the intake pipe is connected to the intake pipe by the outside air. A windmill to be rotated is provided, and a generator driven by the rotation is connected to the windmill .

In order to solve the above-described problem, an exhaust energy recovery apparatus of the present invention is an exhaust energy recovery apparatus that is provided in a facility that discharges heated exhaust and recovers thermal energy of the exhaust, An intake pipe that introduces outside air is connected to a lower part of an exhaust tower that is provided in the facility and discharges the exhaust discharged from the facility at a high place, and the outside air flowing through the intake pipe is connected to the intake pipe by the outside air. provided with a wind turbine to be rotated, to the windmill, the Ri name to connect a generator driven by the rotation, and the wind turbine and the generator is spaced outside of the exhaust tower through the intake pipe It is provided .

Claims (2)

  An exhaust energy recovery device that is attached to a facility that discharges heated exhaust and recovers the thermal energy of the exhaust, wherein the exhaust flows from a low place and is discharged to the atmosphere at a high place. An exhaust tower that communicates with the exhaust tower, and an intake pipe that sucks outside air by the rising air flow of the exhaust gas in the exhaust tower, and is connected to the upstream side of the intake pipe and is sucked by the intake pipe An exhaust energy recovery apparatus comprising: a windmill rotated by an external airflow generated by the motor and a generator driven to rotate by the windmill. A clutch mechanism that connects and disconnects the wind turbine and the generator, and a transmission mechanism that shifts the rotation of the wind turbine and transmits the rotation to the generator are provided between the wind turbine and the generator. 2. The exhaust energy recovery device according to 1.

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