JPS6020087A - Seal mechanism of rotary regenerative type heat exchanger - Google Patents

Abstract

PURPOSE:To improve the reliability of a seal mechanism by a method wherein a gas between the tip of a seal and a fan plate from the axis-of-rotation side towards the outer peripheral side of a rotary heat reservoir is kept nearly constant regardless of the thermal expansion of the rotary heat reservoir. CONSTITUTION:Buffering gears 18a and 18b are respectively fitted to fan plates 5a and 5b. Roller bearings 21a and 21b respectively support the rotating shafts 7a and 7b of guide rollers 6a and 6b, to which rotor tyres 14a and 14b are fitted respectively. Due to the structure as just mentioned above, the gaps between the respective tips of seals 10a and 10b and the respective fan plates 5a and 5b can be automatically kept surely constant over a long period of time in a high temperature and highly corrosive fluid with high dust and high moisture contents regardless of the deformation due to the thermal expansion. Accordingly, the reliability of a seal mechanism is improved.

Description

Detailed Description of the Invention (Technical Field) The present invention provides a rotary regenerative heat exchanger for recovering waste heat from fluids, in order to prevent mixing of high-temperature fluid and low-temperature fluid. The gap between the partition installed in the middle and the tip of the seal of the heat storage body that is close to the partition and moves relative to the partition increases due to the influence of thermal expansion of the rotary regenerative heat exchanger. In addition to preventing an increase in fluid leakage between high-vortex fluid and low-temperature fluid, this gap can be automatically cleaned over a long period of time even in harsh environments with high dust, high humidity, high corrosivity, and high temperature. This invention relates to a rotary regenerative heat exchanger mechanism that adjusts and maintains a fluid leakage prevention function.

(Prior art) In the sealing mechanism of a conventional rotary regenerative heat exchanger,
When the gap between the tip of the seal provided on each casing or radial partition wall for supplying or discharging high mud fluid and low temperature fluid to the heat storage body expands due to thermal expansion deformation of the rotary regenerative heat exchanger, The gap was adjusted either manually or by an automatic sensor detection mechanism.

Manual adjustment has disadvantages such as complexity and discontinuity of adjustment, and automatic adjustment generally requires an expensive automatic adjustment device, leading to an increase in the price of the rotary regenerative heat exchanger.

Furthermore, the atmosphere in which the rotary regenerative heat exchanger is located is highly dusty, humid, highly corrosive, and at high temperatures, so the idea of supporting the fan-shaped plates using the guide rollers of the sealing mechanism has not been considered. However, since the bearings that support the guide rollers cannot cope with wear and tear, the gap adjustment function of the seal mechanism will not last for a long time. It is difficult to maintain tr+, and no technology has been developed to practically apply the rotary axis C.

Under these circumstances, the gap between the tip of the seal and the sector plate can be maintained continuously and reliably over a long period of time without being affected by thermal expansion deformation of the rotary regenerative heat exchanger or deterioration of the seal mechanism operating environment. There has been a demand for a gap adjustment seal mechanism that can be automatically adjusted and is inexpensive.

(Objective of the present invention) The present invention was made in response to the above-mentioned request, and its purpose is to remove waste that contains a lot of dust and moisture and is highly corrosive.
In a rotary regenerative heat exchanger that supplies or discharges high-temperature fluid and exchanges heat between both high and low-temperature fluids, it is installed in the middle of the casing that separates and supplies or discharges high-temperature fluid and low-temperature fluid. The gap between both fluids is automatically adjusted to a constant optimum value even before and after the thermal expansion of the rotary regenerative heat exchanger. However, it is an object of the present invention to provide a sealing mechanism for a new rotary regenerative heat exchanger, which has reliability that allows its adjustment function to be continuously maintained over a long period of time, and is inexpensive.

(Configuration of Example) In an A1-shaped rotary regenerative heat exchanger in which a heat storage body containing a heat absorbing and heat dissipating material rotates in a fan-shaped compartment compartment divided by a number of radial partition walls, the rotary regenerative heat exchanger When heat is applied to the rotating heat storage body, the central axis of rotation of the rotating heat storage body generally thermally expands upward from the lower support bearing.
The outer circumferential portion thermally expands and hangs downward, causing an inverted dish-shaped arcuate deformation as a whole. On the other hand, a casing that encloses the rotating heat storage body and supplies or discharges both fluids to the rotating heat storage body by supplying or discharging both fluids to the rotating heat storage body has significantly smaller thermal expansion deformation than the rotating heat storage body. The knolls attached to the upper and lower parts of the radial partition walls of the rotating heat storage body undergo arcuate deformation in response to the deformation of the rotating heat storage body. On the other hand, the fan-shaped plate attached to the casing for separating the high-temperature fluid and the low-vortex fluid and supplying or discharging them to the rotating heat storage body has a small thermal expansion deformation similar to the deformation of the casing. In order to prevent fluid leakage between high-temperature fluid and low-vortex fluid, the seal and the fan-shaped plate face each other and move relative to each other, and the gap between the tip of the seal and the fan-shaped plate is created by a rotary regeneration type. Before thermal expansion of the heat exchanger, a small gap is set to prevent leakage between the two fluids, but after thermal expansion, the amount of thermal expansion deformation of the tip of the seal and the fan-shaped plate is proportional to each other. Therefore, the gap between the tip of the upper 7-rule and the fan-shaped plate decreases on the rotation center axis side and increases on the outer peripheral side,
The gap between the tip of the lower seal and the sector plate does not change much on the rotational center axis side, but decreases on the outer circumferential side, and for the rotary regeneration type exchanger as a whole, this gap increases, and accordingly, the gap between the two sides increases. Leakage between fluids increases. The /-ru mechanism according to the present invention is constructed so that the increased and decreased portions of the gap can always be maintained appropriately over a long period of time and automatically.

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows the center of the rotating heat storage body on the rotational axis side, whose lower part is held by the support bearing 1 and the upper part by the guide bearing 2, and the middle part of the casing 4 that supplies or discharges high-temperature fluid and low-temperature fluid. It is a cross-sectional view of the rotary regenerating heat exchanger taken along a plane passing through the center of the rotating shaft 7 of the guide roller 6 attached to the outer peripheral side of the fan-shaped plate 5 provided to separate both high and low temperature fluids. , shows a state in which a radial partition wall 8 and a shell 9, which constitute a rotating heat storage body arranged in a cylindrical shape around the rotation center axis side, are housed in a stationary casing 4. Seals 10a and 10b are attached to the upper and lower parts of the directional partition wall 8, respectively, and the seals 1. Opposite Oa and IQ b, phase plate 5a
and 5b are arranged at the upper part of the seal 10a and the lower part of the seal 10b with a slight gap between the seals 1 and 10b.

On the rotation center 1llI]3 side of the upper sector plate 5a,
When the center of rotation l1115 extends upward from the support bearing 1 due to thermal expansion, the fan-shaped plate 5a moves toward the center of rotation [
The upper part is the center of rotation f? so that it moves upward in conjunction with the extension of I'lIl 5. A bin 12 connected to the upper end 11 of lb s and whose lower part constitutes the fulcrum of the fan-shaped plate 5a.
It is connected to the guide bearing 2 by a K-connected hanger rod 13, and on the outer circumferential side of the upper fan-shaped plate 5a, the m-shaped plate 5a is connected to the upper outer circumference of the shell 9 of the rotating heat storage body. 14 In conjunction with the drooping of X+,
A guide roller 63 is attached to move downward, and a pressure rod is pressed by a spring 15a so that the guide roller 68 is always forced to make contact transfer in accordance with the rotation of the rotor tire 14+1. 16a
has been investigated. Rotation center axis 6 of lower fan-shaped plate 511
On the side, the fan-shaped plate 5b is supported by a support rod 17 whose upper part is connected to a pin 12 b Ic that constitutes a fulcrum of the fan-shaped plate 5b, and whose lower part is connected to the casing 4, and the outer circumference of the lower fan-shaped engraving 5b. On the side, when the rotor tire 14 b attached to the lower outer periphery of the rotary heat storage body well 9 is deformed downward under the influence of thermal expansion of the rotary heat storage body, the fan-shaped plate 5 b is attached to the rotor tire 14
A guide roller 61] is attached with an IJV so as to move downward in conjunction with the drooping of , spring 151)
(The depressed pressing rod 16b is removed.)

The shape of the r11 plates is a radial partition of the rotating heat storage body.
The size is slightly thicker than the fan-shaped compartment of the 1r fixed section divided by 1f8, so it can accumulate rotation! (According to the rotation of the body, when one radial partition wall B% 8 begins to enter the sector plate 5 section, the other preceding radial partition wall 8 begins to come out from the sector plate 5 section. (See Figure 2) At this time, a pressure difference occurs on the 011 plane and the rear face in the rotational direction of the radial partition wall 8 at the beginning of entry due to the difference in pressure between the high vortex fluid and the low temperature fluid.

For example, if the rear surface of the radial partition wall 8 at the beginning of entry is the high-pressure low-temperature fluid side, and the front surface is the low-pressure high mud fluid side, then the force pushing the fan-shaped plate 5 vertically from the fan-shaped compartment side The pressure that constitutes this is mostly dominated by low-pressure, high-temperature fluid. When the radial partition wall 8 rotates toward the central portion of the sector plate 5, the pressure that produces the pushing force f1+) is dominated by both the low-pressure, high-vortex fluid and the high-pressure, low-temperature fluid. When the radial partition wall 8 rotates closer to the outlet part of the sector plate 5, the pressure constituting the pushing force is dominated by the high pressure, low vortex fluid. As the rotary heat storage body rotates, alternating forces are applied to the fan-shaped plate 5 from the rotary heat storage body side, causing it to periodically pulsate in the vertical direction. In order to absorb the pulsation of the sector plate 5 and to maintain a constant and stable gap between the tip of the seal 10 and the sector plate, a shock absorber 18 is attached to the casing 4, and a rod 19 restrains the pulsation of the sector plate 5. The damping force of the damping device 18 is constituted by mechanical, fluidic, and electrical devices or a combination thereof.

The rotating shaft 7 of the guide roller 6 is equipped with a low sea bearing 21 that can maintain smooth rotation of the guide roller 6 over a long period of time.

In order to prevent dust, moisture, corrosive substances, and high vortex fluid contained in the heat exchange fluid from entering the roller bearing 21, a dust-proof and moisture-proof device is installed around the bearing 20.
tongue set external cover 22, cover plate 23, iQ
A box-type internal cover 25 with l+shin ring 24 is installed (
ffii, and the lower box-type inner cover 25b and cover plate 23b are further equipped with an Eve 1 outlet 26 for removing dust and moisture that fall into the Bosoknu-type inner cover 25b, and the outlet 26 is not shown in the figure. Not connected to an external dust collector.

The lubrication device for the roller bearing 21 is a lubrication device for the roller bearing 21.
□1], Yo, □□ Yae4゜2. , 1, as shown in this embodiment, the lubricating oil continuity circuit 27 is connected to the bearing 2 OK,
It is constructed using a forced circulation system in which lubricating oil is circulated by a treatment pump (not shown).

The cooling device for the roller bearing 21 includes heating by high-temperature fluid around the bearing 20 or cooling the roller bearing 210.
In order to prevent the bearing 20 from being overheated due to heat generated by rotation, a cooling method is used in which a conduction pipe 28 that conducts water, oil, or air as a coolant is connected to the bearing 20.

FIG. 2 is a view taken along arrow A-A in FIG. 1, and shows an embodiment in which two sets of guide rollers 6 and their attached devices are shown. Roller bearing 20.1, tongue set external cover 22a, +14
4] 7 rings 24; Box type internal cover 25a1 with 1
Lubricating oil conduction IR27a 1 Coolant conduction pipe 28a
, pressure rod 16a1 shock absorber N 1.8 a rod 19
A1 hanger rod 13 is installed (iifi), and one of the radial partition walls equipped with the seal 10a constituting one section of the fan-shaped compartment begins to enter the fan-shaped plate Sa il1, and the radial partition wall The other one is beginning to emerge from the fan-shaped plate 5a.Here, arrow B--indicates the direction of rotation of the rotating heat storage body.

In the figure, the guide roller 6a is rotor tire +4
Guide roller 6a showing a state in which it is rolling in contact with a.
2 is a side view of the rotor tire 14a, in which a souffle nozzle 29 for removing foreign matter such as dust and moisture adhering to the rolling surface of the rotor tire 14a is held in a holder 30, and a guide roller 6a is
A sulphurenoper 31 is held in a holder 32 to remove foreign matter such as dust and moisture adhering to the transfer surface of the lubricating oil conduit 27a1 and the coolant conduit 28. A shows a state in which the bearing 20a is connected to the duct 33 that conducts fluid to the casing 4 that separates and supplies or discharges high-temperature fluid and low-vortex fluid. Here, arrow C indicates the rotation direction of the rotating heat storage body.

In the 7-1 mechanism of the above embodiment, the rotation center axis is vertical 1111+
The structure of the mechanism that automatically maintains the gap between the tip of the seal and the fan-shaped plate in the radial partition wall of the rotary heat storage body of the rotary regenerative heat exchanger of the mold type has been described, but the seal mechanism of the present invention This is not limited to, for example, the circumferential direction of the outer circumference of the rotating heat storage body, the direction of the rotational axis of the outer circumference,
It can also be used as a rotating heat storage body of a rotary regenerating heat exchanger with a horizontal axis of rotation, and can also be used as guide rollers, o-tar tires, pressing devices, loose 4Mj devices, and guide roller bearings. It is to be understood that various changes may be made to the dust-proof and groove-proof device, the lubrication device, the cooling device, the souffler, etc. without departing from the spirit of the present invention.

(Effects of the present invention) After the thermal expansion of the rotary regenerative heat exchanger, in order to maintain a constant gap between the tip of the rotary heat storage body and the fan-shaped plate, it is necessary to adjust the distance according to the displacement of the rotary heat storage body. It is necessary to give the effect of moving the sector plate. The rotation center axis side of the upper fan-shaped plate is 11". When the rotation center l1ll+ is extended upward due to thermal expansion, it is pulled up by the hanger rod by the same amount as this extension. Therefore, the gap between the tip of the seal and the fan-shaped plate is There is almost no increase or decrease. When the rotating heat storage body receives 1kW of heat and hangs downward on the outer peripheral side of the upper fan-shaped plate,
A guide roller Jj attached to a fan-shaped plate is pressed by a pull-type pressure rod to a tire attached to a rotating heat storage body, and follows the drooping amount of the rotating heat storage body to move the rotation center 11.
With the hanger rod connection part on the 111 side as a fulcrum, the gap between the sole tip 1° 11 and the fan-shaped plate hardly increases or decreases. Center of rotation of lower sector plate 4Ql
The + side is supported by support rod 1, and even if the support rod is affected by heat, the amount of expansion is small. The amount of upward expansion under the influence of heat is also small, so /
-The gap between the tip of the lever and the fan-shaped plate hardly increases or decreases. On the outer peripheral side of the lower fan-shaped plate, when the rotating heat storage body undergoes thermal expansion and droops downward, the guide roller attached to the fan-shaped plate is pressed by the rotor tire attached to the rotating heat storage body with a spring-loaded pushing IE rod. The gap between the tip of the seal and the fan-shaped plate hardly increases or decreases unless it is displaced downward about the servo rond connection part on the rotation center side as a fulcrum in accordance with the drooping amount of the rotating heat storage body. Due to this operating effect, in the upper and lower radial partition walls, the gap between the tip of each seal and the fan-shaped plate is almost the same as measured from the rotation center axis side, regardless of the thermal expansion of the rotating heat storage element. can be kept constant.

When a radial partition wall equipped with a pool passes through a fan-shaped plate, the fan-shaped plate is alternately shocked by the pressure of high-temperature fluid and low-temperature fluid, causing a phenomenon in which it vibrates up and down. It has the effect of absorbing vibrations and preventing pulsating increases and decreases in the gap between the tip of the seal and the sector plate.

The rotary regenerative heat exchanger is suitable for high dust, high humidity, and high jr'+1
Because it is often operated in corrosive and high-temperature fluids, a tongue-type outer cover surrounding the guide roller bearing, a plate cover, a box-type inner cover with a foot ring, and dust, 71ii! A dust-proof and moisture-proof device consisting of a separation and extraction port was installed, and a lubricating device and a cooling device were added to the llh bearing, making it impossible to use with the conventional sealing machine I14 because it would cause bearing seizure. This made it possible to use roller bearings, and succeeded in maintaining the smooth operation of the bearings over a long period of time.

Nuklenopers for removing dust, which are installed on the rolling surfaces of the guide rollers and rotor tires, eliminate dust adhering to each rolling surface, smooth the contact transfer between the guide rollers and rotor tires, and remove the dirt from the tip of the seal. This provides the effect of maintaining a constant gap between the fan plate and the fan-shaped plate over a long period of time.

Through the accumulation of the various effects described above, the gap between the tip of the seal and the sector plate can be automatically adjusted in a highly dusty, highly humid, highly corrosive, and high temperature fluid, regardless of the thermal expansion and deformation of the rotating heat storage body. Furthermore, it has become possible to provide an inexpensive and reliable sealing mechanism for a rotary regenerative heat exchanger that can be reliably maintained over a long period of time and minimize leakage between high and low temperature fluids.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the rotary regenerative heat exchanger taken along a plane passing through the center of the rotational axis of the rotating heat storage body and the center of the rotational axis of the guide roller, and Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1. A diagram showing
FIG. 6 is a side view of the guide roller showing a state in which the guide roller is rolling in contact with the rotor tire. Incidentally, the symbols of the main parts in the figure are as follows. 1... Support bearing 2... Guide 1 Inb bearing 6... 1st part center line j 4... Casing 5, +, 5b... Fan-shaped plate slot; +, 6 l)...・・Guide roller 7
,, , '71n... Rotation 1111+8
・・ Radial partition wall 9 ・・ Ner] Oa, IOb ・・ Seal 11 ・ Upper end of rotation center shaft +2a, +2b ・・・ Bin 13 ・・ Hanger rod 14 a , 14 b... Rotor tire 1
5a, 15b... Spring 16 a, 46
b...Press rod 17...Support rods 18a, 18b...Buffer devices 19a, 19b...Rod 20a,
20b...Bearing 21a, 21b...O-5-bearing 2.2a, 22+]...Bone set external cover 23a, 23b...Plate Covers 24a, 24b... Shaft sealing 25a
, 25b... Box type internal cover 26...
... Discharge ports 27a, 27b... Conduit pipe 2811.281)... Conduit pipe 29...
Souffle Nova Bar 30... Holder 31... Souffle Nova Bar 32... Holder 33... Duct

Claims (1)

[Claims] The casing of the rotary regenerative heat exchanger with a sealing mechanism and the heat storage body containing a heat absorbing and heat dissipating material in a fan-shaped compartment divided by a plurality of radial partition walls 2 are relatively A sealing mechanism installed on the relative moving surface of a rotary regenerative heat exchanger having a moving surface includes a guide roller, a rotor tire on which the guide roller contacts and rolls, a device that presses the guide roller against the filter tire, and a fan-shaped A shock absorber that absorbs the pulsating load acting on the plate, a roller bearing installed in the guide roller bearing, a dust-proof and moisture-proof device for the roller bearing, a lubrication device for the roller bearing, a cooling system atmosphere for the roller bearing, and a guide 40 - In response to the thermal expansion and deformation of the dust heat exchanger on the transfer surface between the roller and rotor tire, the gap between the tip of the seal and the fan-shaped plate is always maintained at a minimum over a long period of time to prevent leakage between both high and low temperature fluids. A sealing mechanism for a rotary regenerative heat exchanger that is characterized by minimizing ) The rotational regeneration according to claim 1, characterized in that the device for pressing the guide roller against the rotor tire is constituted by any one of a nupling, a weight, pneumatic pressure, hydraulic pressure, and electromagnetic force, or a combination thereof. Seal mechanism of type heat exchanger. ) Fan-shaped ty+c to absorb the pulsating load acting @ii
1. The device is constituted by any one or a combination of mechanical, fluidic and electrical damping devices. A sealing mechanism for a rotary regenerative heat exchanger according to any one of claims 1 to 2, characterized in that: ) The dust-proof and moisture-proof device for a roller bearing is comprised of an outer cover of the bearing, an inner cover of the bearing, and a dust and moisture outlet. A sealing mechanism for a rotary regenerative heat exchanger according to any one of claims 1 to 5, wherein the lubrication device for the roller bearing is configured by an internal bearing lubrication method or a forced circulation lubrication method. 4. A sealing mechanism for a rotary regenerative heat exchanger according to any one of Item 4. 6) The roller bearing cooling device according to any one of claims 1 to 5, characterized in that the roller bearing cooling device is configured by a cooling method using any one of water, oil, and air, or a combination thereof. 7-l mechanism of rotary regenerative heat exchanger. 7) According to any one of claims 1 to 6, the dust removal device for the transfer surfaces of the guide roller and rotor tire is constituted by a scresoper installed on each transfer surface. Sealing mechanism of rotary regenerative heat exchanger.