JPS6026299Y2 - rotary heat exchanger - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat transfer type gas-gas heat exchanger used to recover heat possessed by waste gas and increase the waste heat regeneration rate.

Currently, various heat exchangers are used to recover heat from waste gas, and one of them is a rotary heat storage type heat exchanger that rotates the heat transfer part, which is effective with low pressure loss. It has come to be widely used.

Various countermeasures have been considered depending on the type of heat exchanger, but in all cases, the gas in the waste gas adheres to the heat transfer surface of the heat transfer section, reducing performance. There were still problems, such as traffic jams and blockages that often interfered with driving.

The present invention attempts to eliminate these conventional drawbacks, and makes use of the characteristics of the rotary heat exchanger to enable effective dust removal and discharge, allowing operation with a significantly high waste heat regeneration rate. The purpose is to provide a rotary heat exchanger.

Other purposes of the present invention are to improve heat recovery from dust-containing gas, enable safe operation even in continuous operation, require less maintenance, and facilitate the reduction of dust content in exhaust air, allowing for post-processing of dust collection. The objective is to provide an inexpensive heat exchanger that can be guaranteed well.

In the present invention, a rotating heat transfer part is installed in a rotating partition plate with a finned heat pipe that enables heat transfer in a casing that has an outlet for heating side gas and an outlet for heated side gas. In a rotary heat exchanger, an injection pipe is arranged inside the heat transfer section so as to inject fluid from the inside of the heat transfer section toward the outer periphery in at least one of the casings on the heating side or the heated side, and This rotary heat exchanger is characterized in that a dust discharge pipe is attached to a casing provided with an injection pipe for discharging dust inside the casing.

The present invention will be described with reference to the drawings with reference to the drawings, in which a heating side casing 1 having a heating gas inlet 1' and a heating gas outlet 1'' has a heating side casing 1 having a heated gas inlet 2' and a heated gas outlet 2''. provided continuously to the heating side casing 2,
An impeller consisting of a heat transfer part 4 is rotatably provided in the casings 1 and 2 via a rotating shaft 5, and a partition plate 6 provided at the center of the impeller allows the casings 1 and 2 to be connected to the heating side gas. The injection pipe 7 is divided into a flow path 3 and a gas flow path 3' on the heated side, and injects compressed fluid from the inside of the heat transfer section 4 in the heating side gas flow path 3 toward the outer periphery. A dust discharge pipe 9 is provided which is connected to the air supply pipe 8, is arranged parallel to the rotating shaft 5 inside the heat transfer section 4, and is opened and communicated with the peripheral wall of the casing 1, for example, the outer circumferential surface of the casing. Compressed fluid is injected from the injection pipe 7 arranged inside the heat transfer part to remove dust attached to the heat transfer part 4 and collected on the casing peripheral wall, and the dust is removed from the dust discharge pipe 9 installed in the casing using airflow. It is arranged to be ejected.

The heat pipes forming the heat transfer section 4 are provided with fins that also serve as blades to increase the heat transfer surface, but a plurality of heat pipes arranged in a blade-like manner are provided on the outer periphery of the rotating partition plate 6 to form an impeller on the heating side. The heat transfer part 4 is rotated using the operating energy of the gas in the heating side gas passage 3 so that it exists across the gas passage 3 and the heated side gas passage 3', and the heated side gas At the same time, the fins and heat pipes can effectively transfer heat and enable heat exchange. 4, or if the kinetic energy of the gas is small, the heat transfer section 4 can be rotated via the rotating shaft 5 by a drive source such as a motor to similarly enable rational heat exchange.

Although the example in FIG. 1 shows an example in which the injection pipe 7 is provided in the casing 1, the injection pipe 7 may be provided in at least one of the heating side casing 1 and the heated side casing 2 together with the dust discharge pipe 9. The connection form of the heating side gas flow path 3 and the heated side gas flow path 3' is also such that there are heated side gas flow paths 3', 3' on both sides of the heating side gas flow path 3, and vice versa. Heating side gas flow paths 3, 3 are provided on both sides of the heating side gas flow path 3'.
It is also possible to configure the casings 1, 2 and impeller of double type so that

The fluid injection pipe 7 is provided close to the inside of the heat transfer section 4 and along the rotating shaft 5, and has a plurality of nozzles or nozzle holes arranged to eject fluid over substantially the entire width of the heat transfer section 4. A curved pipe is used in which the discharge pipe 9 is connected approximately tangentially to the peripheral wall of the casing 1 so that a part of the rotating air flow generated within the outer circumferential surface of the casing is guided, but it is not limited to a curved pipe. However, in any case, the dust discharge pipe 9 is provided on the casing peripheral wall substantially opposite to the position where the fluid injection pipe 7 is provided, so that the dust removed from the heat transfer section 4 is scattered within the casing. It is effective to increase the chances of the dust being collected on the peripheral wall instead of being collected, so that it can be easily guided to the dust discharge pipe 9, and to prevent it from being discharged from the heated gas outlet 1''.

Further, an air supply pipe 8 connected to the fluid injection pipe 7 is connected to an air supply mechanism including a pump as necessary, and blows compressed fluid such as high-pressure air or steam onto the heat transfer section 4 to effectively remove attached dust. It is recommended that you do so.

In the specific example shown in Fig. 3, the dust discharge pipe 9 is connected to the dust collector 10 and separated into dust D and purified gas g, and the purified gas g is released into the atmosphere or connected to the waste gas discharge side of the heat exchanger. It is.

In the specific example shown in FIG. 4, the gas outlet for heating gas, e.g., waste gas, is configured in the opposite manner to that of the previous embodiment, and the relative positions of the compressed fluid injection pipe 7 and the dust discharge pipe 9 are set to be effective. The location has been selected.

In the figure, 11 is a gas seal gas seal, 12 is a bearing, and 13
is a bearing support.

G and G' indicate waste gas, and D indicates dust.

The heated waste gas (or steam) enters from the heated gas inlet 1', rotates the heat transfer section 4 having blades and fins by shearing force, and is discharged from the heated gas outlet 1''.

That is, the waste gas flowing in the connection direction from the heated gas inlet 1' of the rotary heat exchanger forms a rotating airflow along the heating side casing 1, and flows from the outer periphery of the heat transfer section 4 toward the center. .

Due to the rotating airflow at this time, part of the dust in the waste gas is separated from the airflow before reaching the heat transfer section 4, collects on the peripheral wall of the casing 1, and flows out from the dust exhaust pipe 9 together with part of the waste gas.

On the other hand, the remaining dust reaching the heat transfer part 4 causes the heat transfer part 4 to
Since dust adhesion to the heat transfer part 4 is unavoidable, a fluid injection pipe 7 is disposed inside the heat transfer part 4 to remove the dust adhering to the heat transfer part 4.

For example, since compressed fluid such as high-pressure air or steam is blown from the injection pipe 7 from the inside of the heat transfer section 4 toward the outer periphery, the tast is blown off to the circumferential wall of the casing 1 and carried by the aforementioned rotating airflow to the tast discharge pipe 9. It will be discharged from

Furthermore, the heat is transferred from the heated gas to the fins of the heat transfer section 4, and is instantaneously transferred to the heat transfer section 4 in the casing 2 on the heated side by the heat pipe, and is transferred to the heated gas through the fins.

In this way, the thermal energy and kinetic (pressure) energy of the heated gas are effectively used to suck and heat the heated gas,
Since it functions as both a blower and a heat exchanger, it can process large quantities at once, greatly improving cycle efficiency.

In this case, a rotating heat transfer part is installed in a rotating partition plate with a finned heat pipe that enables heat transfer, in a casing equipped with an outlet for the heating side gas and an outlet for the heated side gas. In a rotary heat exchanger, an injection pipe is disposed inside the heat transfer part so as to inject fluid from the inside of the heat transfer part in the casing on the heating side or the heated side toward the outer periphery, and the injection pipe is arranged inside the casing. By attaching the dust discharge pipe for dust discharge to the casing where the injection pipe is installed, dust in the waste gas can be properly removed without adhering to the heat transfer part, reducing heat transfer performance or clogging. It is possible to operate safely and with high performance without causing any trouble to the operation, and in addition, the exhaust heat is regenerated by the combination of the dust removal injection pipe placed inside the heat transfer part and the dust exhaust pipe attached to the casing. It is easy to significantly increase the thermal efficiency (temperature efficiency), it is easy to discharge the collected dust out of the system, and it is possible to increase the capacity of the heat exchanger.It is also small in volume and weight, and has a low heat transfer rate. The high compact heat transfer surface is commonly used to increase the temperature difference and increase the heat exchange function.Furthermore, the centrifugal force can increase the heat pipe capacity, allowing efficient heat recovery and handling of dust-containing gas. The heat exchanger is easy to maintain, easy to maintain, can operate normally for a long period of time, and is simple in construction, suitable for mass production, and extremely economical.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a longitudinal sectional view and FIG.
The figure is a side view, and FIGS. 3 and 4 are cutaway side views of other embodiments. 1... Heating side casing, 1'... Heating gas inlet, 1z... Heating gas outlet, 2...
...Heated side casing, 2'...Heated gas inlet, 2''...Heated gas outlet, 3...
・Heating side gas flow path, 3'...Heated side gas flow path, 4...Heat transfer part, 5...Rotating shaft, 6.
...Partition plate, 7...Injection pipe, 8...
...Air supply pipe, 9...Discharge pipe, 10...
Dust collector, 11... Packing, 12...
・Bearing, 13...Bearing support.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A rotating heat transfer part in a casing with an outlet for heating gas and an inlet and outlet for heated gas rotates with a finned heat pipe that enables heat transfer. In a rotary heat exchanger provided on a partition plate, an injection pipe is installed inside the heat transfer section so as to inject fluid from the inside of the heat transfer section toward the outer periphery in the casing on at least one of the heating side and the heated side. A rotary heat exchanger characterized in that a dust discharge pipe for discharging dust inside the casing is attached to a casing in which an injection pipe is provided. 2. Utility model registration claim 1, wherein the injection pipe is a plurality of nozzles or nozzle holes arranged along the rotation axis of the heat transfer section and injecting fluid over substantially the entire width of the heat transfer section. Rotary heat exchanger as described in section. 3. The rotary heat exchanger according to claim 1 or 2, wherein the dust discharge pipe is open and communicated with an outer diameter surface of the casing. 4. The rotary heat exchanger according to claim 3, wherein the tost discharge pipe is a curved pipe connected in a substantially tangential direction that guides a part of the rotating airflow generated within the outer circumferential surface of the casing. vessel. 5. The rotary heat exchanger according to claim 3 or 4, wherein the dust discharge pipe is provided on a peripheral wall of the casing substantially opposite to the position where the injection pipe is provided.