JP5167100B2 - Cooling and conveying device for hot granular fluid - Google Patents

Description

  The present invention is applied to a cooling and conveying device for high-temperature granular fluid such as ash-mixed sand discharged from a circulating fluidized bed furnace, and passes high-temperature granular fluid through a charging port to a rotating body portion installed inside an outer cylinder portion. It is carried in, cooled by a cooling device while moving the granular fluid in the axial direction by rotation of the rotating body portion, and cooled, and the granular fluid is discharged from a discharge port disposed on the opposite side to the input port in the axial direction. The present invention relates to a cooling and conveying apparatus for hot granular fluid configured to be carried out.

In recent years, circulating fluidized bed furnaces are often used as boilers in thermal power generation facilities. In such a circulating fluidized bed furnace, a certain amount of high-temperature ash-mixed sand (hereinafter referred to as high-temperature granular fluid) in the furnace is taken out, and after removing foreign substances in the high-temperature granular fluid by separation, only the regular granular fluid is returned to the furnace. This is done continuously.
Conventionally, a screw-type cooling / conveying device as shown in FIG. 6 is used as a cooling / conveying device for this type of high-temperature granular fluid.

In FIG. 6, the rotating body portion 04 is installed inside the outer cylinder portion 02, and carries high-temperature granular fluid through the inlet 9 into the rotating body portion 04 that is rotationally driven by a driving device (not shown). The rotating body portion 04 is driven to rotate to remove foreign matter, and is cooled by passing cooling water inside, and the rotation of the rotating body portion 04 causes the spiral blade 03 on the outer periphery to rotate together with the rotating body portion 04, The temperature is lowered while moving the granular fluid in the axial direction.
The granular fluid lowered in temperature by such cooling is discharged to the outside from the discharge port 10, and only such regular granular fluid is returned to the furnace.

  Moreover, in patent document 1 (Unexamined-Japanese-Patent No. 2005-212905), the water jacket 13 for cooling granular fluid is provided in the outer peripheral surface of the cylindrical drum 11 rotated in a horizontal attitude, and a high temperature granular fluid is transferred in the cylindrical drum 11. The transfer means 14 is configured by attaching a large number of blades 15 to the inner surface of the cylindrical drum 11, and each of the blades 15 can scoop up the granular fluid A up to a predetermined height with the cylindrical drum 11 and the outlet of the cylindrical drum. By attaching to the part 11b side so that it can be sent out, the stirring action of the high-temperature granular fluid A in the cylindrical drum 11 is activated, and the cooling efficiency of the high-temperature granular fluid is increased.

JP 2005-212905 A

  In the screw-type cooling and conveying device, the high-temperature granular fluid is a waste conveying material, and foreign materials such as gravel stones, small metal fittings, and wire wires are mixed in addition to the original fuel. The head ash cooler may enter the head ash cooler as it is, causing damage to the inner surface of the head ash cooler, internal clogging, clogging, etc., resulting in water leakage from the damaged part, overload stop of the drive unit, etc. Cause failure.

  In the screw-type cooling / conveying device as shown in FIG. 6, such a problem is that the basic structure is cooling / conveying by rotation of the rotating body portion 04 with the spiral blade 03 on the outer periphery. ), Sand exceeding a specified level is pushed in between the blade 03 and the inner periphery of the outer cylinder part 02, or the sand flow of the granular fluid is deteriorated by the foreign matter, and the sand tightness 03a is generated.

  As shown in FIG. 6 (B), when the sandtight 03a is generated, the rotating body 04 tries to get over the sandtight 03a, and as shown in FIGS. 6 (B) and 6 (C), The force in the F direction acts, and the rotating body portion 04 is bent (04a is a view when bent) as shown in FIG. 6C, and the rotating body portion 04 is bent.

  SUMMARY OF THE INVENTION In view of the problems of the prior art, the present invention provides a high-temperature granular fluid cooling and conveying apparatus in which a high-temperature granular fluid is cooled and conveyed by a rotating body that is rotationally driven. An object of the present invention is to provide a cooling and conveying apparatus for high-temperature granular fluid that can prevent the occurrence and can convey the high-temperature granular fluid with a cooling effect.

The present invention achieves such an object. A high temperature granular fluid is carried into a rotating body portion installed inside an outer cylinder portion through an inlet, and the granular fluid is moved in the axial direction by the rotation of the rotating body portion. In the cooling and conveying apparatus for high-temperature granular fluid configured to cool the cooling fluid and lower the temperature while discharging the granular fluid from the outlet disposed on the opposite side in the axial direction from the inlet,
The rotating body portion is formed of a cylindrical body that is rotationally driven by a driving device, and the inner peripheral blades installed on the inner periphery of the rotating body portion include a plurality of inner peripheral blades at predetermined intervals in the circumferential direction. Individual inner blades are formed by twisting each inner peripheral blade at a constant angle in the axial direction, and this inner peripheral blade group is installed in multiple stages in the axial direction, and the end of each inner peripheral blade group is wrapped by a fixed length. The high temperature granular fluid is configured to move in the axial direction by rotation of the inner peripheral blade group,
The cooling device is configured to cool the granular fluid by feeding cooling water into a cooling water chamber formed between an inner circumference of the outer cylinder portion and an outer circumference of the cylindrical body of the rotating body portion. It is characterized by that.

  In this invention, preferably, a cylindrical body in which cooling water circulates is installed inside the rotating body portion, and an outer peripheral blade is axially arranged on the outer periphery of the cylindrical body at a certain angle toward the discharge port side. The outer peripheral blade group is installed in a plurality of stages in the axial direction.

  In this invention, preferably, a cylindrical body in which cooling water circulates is installed inside the rotating body portion, and an outer peripheral blade is axially disposed on the inlet side in the outer periphery of the cylindrical body. The outer peripheral blade group is formed in a plurality of stages in the axial direction by twisting at a constant angle.

According to the reference invention shown in FIG. 1, in the cooling and conveying apparatus for high-temperature granular fluid, the rotating body portion is formed of a cylindrical body that is rotationally driven by a driving device, and the spiral blade has an axial length on the inner circumference. Provided so as to move the high-temperature granular fluid in the axial direction by rotation of the spiral blade, and the cooling device includes an inner periphery of the outer cylinder portion and an outer periphery of the cylindrical body of the rotating body portion. Is configured to cool the granular fluid by feeding cooling water into the cooling water chamber formed between the
Since the spiral blade is provided over the entire length in the axial direction on the inner periphery of the rotating body portion, the high temperature granular fluid is cooled by the cooling water of the cooling device while the inner periphery of the rotationally driven cylindrical body is being cooled. It moves in the axial direction by a spiral blade.

In Patent Document 1, a large number of spiral blades are attached to a part of the inner surface of a cylindrical drum. However, when the fragmentary spiral blades are installed, the hot granular fluid sand naturally falls from the top to the bottom. However, sand tightness is likely to occur.
On the other hand , in the reference invention shown in FIG. 1, the hot granular fluid is caused to move naturally over the entire length in the axial direction of the spiral blade while the sand naturally falls from the upper part to the lower part due to the rotation of the cylindrical body. Foreign matter is removed over the entire length in the axial direction from the inlet side to the outlet side, and it is dried and cooled, so that sand tightness is avoided and the cylindrical body is bent by avoiding such sand tightness. Is avoided, and the durability of the cylindrical body is improved.

Further, in this reference invention, if the rotating body portion is configured such that the rotational axis is horizontally disposed and the natural fluid falls repeatedly while rotating the spiral blade, the rotational axis is disposed horizontally. By doing so, the natural falling movement of the sand from the upper part to the lower part is further promoted by the rotation of the cylindrical body.

Further, in this reference invention, if a cylindrical body in which the cooling water circulates is installed inside the rotating body portion, the cooling fluid can be obtained while the sand of the granular fluid naturally falls from the upper part to the lower part by the rotation of the cylindrical body. Since it contacts the cylindrical body which circulates, the cooling effect of a high-temperature granular fluid further improves.

Then, the effect of the present invention described above, in the cooling transfer apparatus of the hot particle fluid, rotating body portion is formed by a cylindrical body which is rotated by a driving device is installed in the inner periphery of the rotary body The inner peripheral blades are formed by installing a plurality of inner peripheral blades at predetermined intervals in the circumferential direction and twisting each inner peripheral blade at a constant angle in the axial direction. A plurality of stages, and the end portions of each inner peripheral blade group are formed to wrap for a certain length, and the high-temperature granular fluid is configured to move in the axial direction by the rotation of the inner peripheral blade group. If the cooling device is configured to cool the granular fluid by feeding cooling water into a cooling water chamber formed between the inner periphery of the outer cylindrical portion and the outer periphery of the cylindrical body of the rotating body portion. ,
A plurality of inner peripheral blades are installed at predetermined intervals in the circumferential direction, and each inner peripheral blade is twisted and formed at a constant angle in the axial direction so that the end portions of each inner peripheral blade group are wrapped by a predetermined length. By wrapping the end of each inner peripheral blade group for a certain length, the flow of the high temperature granular fluid is continuous and smooth. It is cooled and conveyed in the axial direction along the inner peripheral blade group.
Thus, the occurrence of sand tightness is avoided, and the occurrence of bending in the cylindrical body is avoided by avoiding the occurrence of sand tightness, thereby improving the durability of the cylindrical body portion.

In the above-described present invention, a cylindrical body in which cooling water circulates is installed inside the rotating body portion, and the outer peripheral blades are axially twisted on the outer periphery of the cylindrical body at a certain angle toward the discharge port. If this outer peripheral blade group is installed in multiple stages in the axial direction,
Due to the rotation of the cylindrical body, the hot granular fluid sand spontaneously falls from the top to the bottom, and this sand contacts the outer peripheral blades provided on the outer periphery of the cylindrical body on the inner peripheral side and slides down to the outlet side to flow. As a result, the conveyance capacity is improved.

Further, in the above-described present invention, a cylindrical body in which cooling water circulates is installed inside the rotating body portion, and outer peripheral blades are arranged on the outer periphery of the cylindrical body at a constant angle in the axial direction on the inlet side. If it is formed by twisting and this outer peripheral blade group is installed in multiple stages in the axial direction,
Due to the rotation of the cylindrical body, the hot granular fluid sand naturally falls from the upper part to the lower part, and this sand comes into contact with the outer peripheral blades provided on the outer periphery of the cylindrical body on the inner peripheral side. Since it is twisted on the inlet side at a fixed angle, the flow of the hot granular fluid is deflected to the inlet side, and then slides down and flows. The effect is improved.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

FIG. 1A is a cross-sectional view taken along the axial center line of a cooling and conveying apparatus for high-temperature granular fluid according to a first embodiment (reference invention) of the present invention, and FIG. 1B is a cross-sectional view taken along line AA in FIG. .

1 (A) and 1 (B), a cooling / conveying device for high-temperature granular fluid is denoted by reference numeral 100, and is a cylindrical rotation installed inside a cylindrical outer cylinder 1 via a cooling water chamber 12. A body part 2 is provided. An inlet 9 is installed at the inlet of the rotating body 2, and high-temperature granular fluid is carried from the inlet 9.
The cylindrical rotating body 2 is extended in the axial direction, and spiral blades 3 are fixed to the inner periphery of the rotating body 2 at a uniform pitch over the entire length in the axial direction.
In the spiral blade 3, a high-temperature granular fluid is introduced into the inner rotation space 4 from the inlet 9. The hot granular fluid is cooled by the cooling water chamber 12 in the rotating space 4 and then carried out from the right outlet 10.

  Both ends of the rotating body 2 and both ends of the outer cylinder 1 are closed by covers 5 and 6. The driving device 7 is attached to an end portion of the outer cylinder portion 1 and meshes with a gear 8 fixed to the end portion of the rotating body portion 2 to rotationally drive the rotating body portion 2. The rotation center of the rotating body 2 is denoted by reference numeral 11.

In such a high temperature granular fluid cooling and conveying apparatus 100, the high temperature granular fluid is carried into the rotating body 2 installed inside the outer cylinder 1 through the inlet 9, and is rotated by the driving device 7. By the rotation, the high temperature granular fluid is cooled in the cooling water chamber 12 while being moved in the axial direction in the rotation space 4, and the temperature is lowered.
And since the spiral blade 3 is provided in the rotation space 4 of the inner periphery of the said rotary body part 2 over the full length of an axial direction, a high temperature granular fluid is in a high temperature granular fluid by rotation of the rotary body part 2. While the sand naturally falls from the upper part to the lower part, the foreign matter is removed and dried over the entire length in the axial direction from the inlet 9 side toward the outlet 10 side. The high-temperature granular fluid is moved in the axial direction by the spiral blade 3 while being cooled by the cooling water in the cooling water chamber 12 in the rotating space 4 on the inner periphery of the rotating body 2.

In the conventional technology, a large number of spiral blades are attached to a part of the inner surface of a cylindrical drum. However, when such fragmentary spiral blades are installed, the hot granular fluid sand continues to fall naturally from the top to the bottom. Therefore, the sand tightness is likely to occur.
On the other hand, in this embodiment, the hot granular fluid is naturally moved from the upper part to the lower part by the rotation of the rotating body 2 by the movement of the spiral blade 3 over the entire length in the axial direction. While dropping, foreign matter is removed over the entire length in the axial direction from the inlet 9 side to the outlet 10 side, and it is dried and cooled, so that sand tightness is avoided, and such sand tightness is avoided. Thus, the bending of the rotating body 2 is avoided, and the durability of the rotating body 2 is improved.

Further, in the first embodiment (reference invention) , the rotating body portion 2 is arranged such that the rotational axis 11 is disposed horizontally, and the above-described spontaneous fall of the granular fluid is performed while rotating the spiral blade 3. If it repeats and it is constituted, rotation axis 11 will be arranged horizontally, and natural fall movement which sand of hot granular fluid will move from the upper part to the lower part by rotation of rotating body part 2 will be promoted more.

(Second embodiment (reference invention) )
FIG. 2 is a cross-sectional view taken along the axial line of the cooling and conveying apparatus for hot granular fluid according to the second embodiment (reference invention) of the present invention.
In the second embodiment (reference invention) , a cylindrical body 16 through which cooling water circulates is installed at the center of the inside of the rotating body portion 2, and a cooling water chamber 17 is formed in the cylindrical body 16. The cooling water is allowed to flow (15 is a cooling water inlet and 18 is a cooling water outlet).
Other configurations are the same as those of the reference example (FIG. 1), and the same members are denoted by the same reference numerals.
If comprised in this way, since the sand of a granular fluid will fall naturally from upper part to the lower part by rotation of the rotary body part 2, it contacts the cylindrical body 16 with which cooling water circulates, Therefore The cooling effect of a high temperature granular fluid is effective. Further improve.

(Third embodiment (the present invention) )
FIG. 3A is a cross-sectional view taken along the axial center line of the cooling and conveying apparatus for high-temperature granular fluid according to the third embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along the line BB in FIG.
In the third embodiment, the high-temperature granular fluid cooling and conveying apparatus 100 is configured as follows.
The rotating body 2 is formed of a cylindrical body that is rotationally driven by the driving device 7, and the inner peripheral blade 21 installed on the inner periphery of the rotating body 2 is shown in FIG. And a plurality of inner peripheral blades 21 are formed by twisting each inner peripheral blade 21 in the axial direction in the direction of the discharge port 10 at a predetermined angle α. A plurality of stages 21 are installed in the axial direction as in the inner peripheral blade group 22, and the end portions of the inner peripheral blade group 21 and the inner peripheral blade group 22 are formed so as to have a predetermined length S.
Other configurations are the same as those of the first embodiment (FIG. 1), and the same members are denoted by the same reference numerals.

According to the third embodiment, a plurality of inner peripheral blades 21 and 22 are installed at predetermined intervals in the circumferential direction, and each inner peripheral blade 21 and 22 is twisted at a constant angle α in the axial direction. Since the end portions of the inner peripheral blade group 21 and the inner peripheral blade group 22 are formed so as to overlap each other by a predetermined length S, the flow of the high-temperature granular fluid for each inner peripheral blade group is changed to each inner peripheral blade group. By wrapping the end of each of them with a fixed length S, the flow of the high-temperature granular fluid has continuity, and is smoothly cooled and conveyed in the axial direction along the inner peripheral blade groups 21 and 22.
Thereby, generation | occurrence | production of the said sand tightness is avoided, generation | occurrence | production of a bending is avoided in the rotary body part 2 by avoiding generation | occurrence | production of this sand tightness, and durability of the rotary body part 2 improves.

(Fourth embodiment (the present invention) )
FIG. 4A is a cross-sectional view taken along the axial center line of the cooling and conveying apparatus for high-temperature granular fluid according to the fourth embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along the line CC in FIG.
In the fourth embodiment, the high-temperature granular fluid cooling and conveying apparatus 100 is configured as follows in addition to the third embodiment.
In addition to the fourth embodiment, a cylindrical body 33 in which cooling water circulates in the interior 34 is installed at the inner center of the rotating body 2, and the outer peripheral blade 32 is disposed on the outer periphery of the cylindrical body 33 in the axial direction. Is formed by twisting at a constant angle β on the discharge port 10 side (U direction in the figure), and this outer peripheral blade 32 group is installed in a plurality of stages in the axial direction.
The other structure is the same as that of the said 3rd Example (FIG. 3), and the same member is shown with the same code | symbol.

  According to the fourth embodiment, the rotating granular material sand naturally falls from the upper part to the lower part due to the rotation of the rotating part 2, and the outer peripheral blade 32 provided on the outer periphery of the cylindrical body 33 on the inner peripheral side. Since it slides and flows to the discharge port 10 side, the conveying ability is improved.

(Fifth embodiment (present invention) )
FIG. 5A is a cross-sectional view taken along the axial center line of the cooling and conveying apparatus for hot granular fluid according to the fifth embodiment (the present invention) of the present invention, and FIG. .
In the fifth embodiment, the high temperature granular fluid cooling and conveying apparatus 100 is configured as follows in addition to the third embodiment.
In addition to the fifth embodiment, a cylindrical body 33 in which cooling water circulates in the interior 34 is installed at the inner center of the rotating body 2, and an outer peripheral blade 42 is axially disposed on the outer periphery of the cylindrical body 33. Is formed by twisting on the inlet 9 side at a constant angle γ, and the outer peripheral blade group 42 is provided in a plurality of stages in the axial direction.
The other structure is the same as that of the said 3rd Example (FIG. 3), and the same member is shown with the same code | symbol.

  According to the fifth embodiment, the rotating granular material sand spontaneously falls from the upper part to the lower part due to the rotation of the rotating part 2, and the outer peripheral blade 42 provided on the outer periphery of the cylindrical body 33 on the inner peripheral side. Since the outer peripheral blade 42 is twisted to the inlet 9 side at a constant angle γ in the axial direction, the slip flow occurs after the flow of the high-temperature granular fluid is deflected toward the inlet 9. Since it falls and flows, the residence time of a high-temperature granular fluid becomes long and the cooling effect improves.

According to the present invention, in the high-temperature granular fluid cooling and conveying device, when the high-temperature granular fluid is cooled and conveyed by the rotating body that is rotationally driven, the high-temperature granular fluid is prevented from being sand-tight due to mixing of foreign matters, etc. In addition, it is possible to provide a cooling / conveying device for high-temperature granular fluid that can convey the high-temperature granular fluid with an increased cooling effect.

(A) is sectional drawing in alignment with the axial center line of the cooling and conveying apparatus of the high temperature granular fluid concerning 1st Example (reference invention) of this invention , (B) is AA sectional drawing of (A). It is sectional drawing which follows the axial center line of the cooling conveyance apparatus of the high temperature granular fluid concerning 2nd Example (reference invention) of this invention . FIG. 3A is a cross-sectional view taken along the axial center line of the cooling and conveying apparatus for high-temperature granular fluid according to the third embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. (A) is sectional drawing which follows the axial center line of the cooling and conveying apparatus of the high temperature granular fluid concerning 4th Example of this invention, (B) is CC sectional drawing of (A). (A) is sectional drawing which follows the axial center line of the cooling and conveying apparatus of the high temperature granular fluid concerning 5th Example of this invention, (B) is DD sectional drawing of (A). (A) It is the schematic of the conventional screw type cooling conveyance apparatus. (B) is an action diagram of the load, and (C) is a bending diagram of the rotating body.

DESCRIPTION OF SYMBOLS 1 Outer cylinder part 2 Rotating body part 3 Spiral blade 4 Rotating space 7 Driving device 9 Input port 10 Outlet port 12 Cooling water chamber 16 Cylindrical body 17 Cooling water chamber 21, 22 Inner peripheral blade 32 Outer peripheral blade 33 Cylindrical body S Constant Length α, β, γ Fixed angle 100 Cooling and conveying device for high temperature granular fluid

Claims (3)

A high temperature granular fluid is carried into the rotating body portion installed inside the outer cylinder portion through the inlet, and the temperature of the granular fluid is lowered by cooling with a cooling device while moving the granular fluid in the axial direction by the rotation of the rotating body portion, In the cooling and conveying device for high-temperature granular fluid configured to carry out the granular fluid from an outlet arranged on the opposite side in the axial direction from the inlet,
The rotating body portion is formed of a cylindrical body that is rotationally driven by a driving device, and the inner peripheral blades installed on the inner periphery of the rotating body portion include a plurality of inner peripheral blades at predetermined intervals in the circumferential direction. Individual inner blades are formed by twisting each inner peripheral blade at a constant angle in the axial direction, and this inner peripheral blade group is installed in multiple stages in the axial direction, and the end of each inner peripheral blade group is wrapped by a fixed length. The high temperature granular fluid is configured to move in the axial direction by rotation of the inner peripheral blade group,
The cooling device is configured to cool the granular fluid by feeding cooling water into a cooling water chamber formed between an inner circumference of the outer cylinder portion and an outer circumference of the cylindrical body of the rotating body portion. A cooling and conveying apparatus for high-temperature granular fluid. A cylindrical body in which cooling water circulates is installed inside the rotating body portion, and an outer peripheral blade is formed on the outer periphery of the cylindrical body by twisting it at an angle toward the discharge port in the axial direction. cooling transfer apparatus of the hot particle fluid according to claim 1, characterized in that a plurality of stages set up the outer peripheral blade group in the axial direction. A cylindrical body in which cooling water circulates is installed inside the rotating body part, and outer peripheral blades are formed on the outer periphery of the cylindrical body by twisting at a constant angle in the axial direction on the inlet side. cooling transfer apparatus of the hot particle fluid according to claim 1, characterized in that a plurality of stages set up the outer peripheral blade group in the axial direction.

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