Adaptive central tube device for cyclone separator of circulating fluidized bed boiler

Abstract

The present invention relates to an adaptive central tube device for a circulating fluidized bed boiler cyclone separator. In order to overcome the above-mentioned defects of the prior art, the present invention comprises an inner wall at the top of a cyclone separator and a central tube, an adaptive support plate is arranged between the two, the adaptive support plate is composed of a bracket and a double hinged plug plate, N brackets are arranged in the cyclone separator, and are evenly distributed around the axis of the cyclone separator, each double hinged plug plate comprises a square steel arm and a hinged plug plate, each hinged plug plate is inserted into the slide groove of each bracket in a one-to-one correspondence, each square steel arm can swing freely within a certain range around the corresponding inner vertical axis, and each hinged plug plate can swing freely within a certain range around the corresponding outer vertical axis. A positioning support sleeve is also sleeved on the central tube. The present invention has the advantages of being able to automatically deform when thermal expansion and contraction caused by temperature difference occurs, and being able to automatically reset when the heat is balanced, and is suitable for use in a circulating fluidized bed boiler cyclone separator.

Description

Technical Field

[0001] The invention relates to an adaptive central tube device of a cyclone separator of a circulating fluidized bed boiler. Background Art

[0002] The cyclone separator is one of the core components of the circulating fluidized bed boiler, and the central cylinder is a component installed on the cyclone separator, that is, the exhaust pipe. The central cylinder and the outer cylinder of the cyclone separator form an annular channel. The flue gas entering the separator rotates around the central cylinder. Under the action of centrifugal force and gravity, most of the ash particles are separated, and a small amount of fine ash is turned upward to form a vortex, which is discharged from the central cylinder into the tail flue.

[0003] The central tube of the existing circulating fluidized bed boiler is welded with multiple radially distributed support plates, and the outer ends of the support plates are welded to the inner wall of the cyclone separator, but the central tube is fixed. When the circulating fluidized bed boiler is working, the flue gas and flame passing through the central tube and the surrounding support plates are not always evenly distributed, which leads to different temperatures of the central tube and the surrounding support plates. When the temperature difference is too large, the thermal stress generated by thermal expansion and contraction will easily cause the welds at the ends of each support plate to crack, causing the central tube to deflect or even fall off. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to overcome the above-mentioned defects of the prior art and provide an adaptive central tube device for a cyclone separator of a circulating fluidized bed boiler.

[0005] In order to solve the above technical problems, the present invention provides an adaptive central tube device for a cyclone separator of a circulating fluidized bed boiler, comprising an inner wall at the top of a cyclone separator and a central tube, and N radially distributed support plates are welded to the outside of the central tube, characterized in that: each support plate is an adaptive support plate, and the adaptive support plate is composed of a bracket and a double-hinged plug plate, wherein the bracket body is in a rectangular shape and has a slide groove thereon, and the N brackets are arranged in the equipped cyclone separator, and are evenly distributed around the axis of the equipped cyclone separator, and the outer ends thereof are welded to the inner wall at the top of the equipped cyclone separator. On the wall, each double-hinged plug plate includes a square steel arm and a hinged plug plate, the two ends of the square steel wall are respectively provided with an inner vertical axis and an outer vertical axis, one end of the hinged plug plate is provided with a sleeve, and is sleeved on the outer vertical axis of the square steel arm through the sleeve, N protrusions are evenly arranged on the outer circumference of the central tube, each inner vertical axis is fixed on the protrusion one by one, each hinged plug plate is inserted into the slide groove of each bracket one by one, each square steel arm can swing freely within a certain range around the corresponding inner vertical axis, and each hinged plug plate can swing freely within a certain range around the corresponding outer vertical axis.

[0006] A positioning support sleeve is also sleeved on the center tube, which includes an inner ring and M radially distributed support plates. The inner ring is fixed on the center tube, and the outer end of the support plate directly or indirectly contacts the inner wall of the top of the cyclone separator without any connection. The axis line of the positioning support sleeve coincides with the axis line of the center tube, where M and N are both positive integers greater than or equal to 3.

[0007] With this design, when the center tube, support plate and each support plate are heated evenly, the center tube is located in the center of the cyclone separator. Figure 1 , 2 and Figure 5 shown.

[0008] When the positioning support sleeve expands and contracts due to uneven heating, the center tube may deviate to one side, such as Figure 6 When the heat is evenly distributed again, the positioning support sleeve recovers and drives the center tube to automatically reset. Figure 5 During the whole process, only the extension and contraction friction occurs between the hinged plug plate and the bracket, and normal rotation friction occurs around the two vertical axes. The wear is limited and controllable, and irreversible weld cracking will not occur, which greatly improves the life of the center tube.

[0009] As an optimization, each protrusion is composed of two upper and lower hanging ears, the inner sides of the two hanging ears are arc-shaped, welded to the outer wall of the central tube, and the two hanging ears have through holes, and are sleeved on the corresponding inner vertical shaft through the through holes. Such a design has a simple structure, convenient processing, and scientific force.

[0010] As an optimization, each support plate has an arc plate at the outer end, and contacts the inner wall of the top of the cyclone separator through the arc plate. This design disperses the pressure of the outer end of the support plate on the inner wall of the top of the cyclone separator, and is conducive to positioning the support sleeve and the center tube.

[0011] As an optimization, each square steel arm can swing freely around the corresponding inner vertical axis within a range of plus or minus 30 degrees, and the outer edge of the side wall at the inner end of the square steel arm plays a limiting role. With this design, the limiting structure is simple and practical.

[0012] As an optimization, each hinged plug plate can swing freely around the corresponding external vertical axis within a range of plus or minus 30 degrees, and the inner edge of the side wall at the outer end of the square steel arm plays a limiting role. With this design, the limiting structure is simple and practical.

[0013] The adaptive central tube device of the circulating fluidized bed boiler cyclone separator of the present invention has the advantages of simple structure, automatic deformation when thermal expansion and contraction caused by temperature difference occurs, and automatic reset when the heat is balanced, and is suitable for use in the circulating fluidized bed boiler cyclone separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The adaptive central tube device of the cyclone separator of the circulating fluidized bed boiler of the present invention is further described below in conjunction with the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the installation of the adaptive central tube device of the circulating fluidized bed boiler cyclone separator in the equipped cyclone separator;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the adaptive central tube device of the circulating fluidized bed boiler cyclone separator (without the upper flue);

[0017] Figure 3 yes Figure 2 The schematic diagram of the exploded structure of the adaptive central tube device of the cyclone separator of the circulating fluidized bed boiler shown;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the double-hinged plug plate of the adaptive central tube device of the circulating fluidized bed boiler cyclone separator;

[0019] Figure 5 yes Figure 2 The schematic diagram of the top view of the structure of the adaptive central tube device of the circulating fluidized bed boiler cyclone separator shown (the positioning support sleeve is omitted);

[0020] Figure 6 It is a schematic diagram of the adaptive central tube device of the circulating fluidized bed boiler cyclone separator automatically deviating to one side under the state of thermal expansion and contraction (the positioning support sleeve is omitted).

[0021] In the figure: 1 is the inner wall of the top of the cyclone separator, 2 is the center tube, 3 is the adaptive support plate, 31 is the bracket, 32 is the double hinged plug plate, 3201 is the square steel arm, 3202 is the hinged plug plate, 3203 is the inner vertical axis, 3204 is the outer vertical axis, 3205 is the sleeve, 4 is the positioning support sleeve, 41 is the inner ring, 42 is the support plate, 42 is the support plate, 43 is the notch, 5 is the hanging ear, 44 is the arc plate, and 6 is the flue. DETAILED DESCRIPTION

[0022] Implementation method 1: Figure 1-6As shown, the adaptive central tube device of the circulating fluidized bed boiler cyclone separator comprises an inner wall 1 at the top of the equipped cyclone separator and a central tube 2, and the central tube 2 is welded with N radially distributed support plates on the outside, characterized in that: each support plate is an adaptive support plate 3, and the adaptive support plate 3 is composed of a bracket 31 and a double-hinged plug plate 32, wherein the bracket 31 is a rectangular parallelepiped body with a slide groove thereon, and N brackets 31 are arranged in the equipped cyclone separator and are evenly distributed around the axis of the equipped cyclone separator, and the outer ends thereof are welded to the inner wall 1 at the top of the equipped cyclone separator, and each double-hinged plug plate 32 comprises a square steel arm 3201 and a hinged plug plate 3202, An inner vertical axis 3203 and an outer vertical axis 3204 are respectively provided at both ends of the square steel wall 3201, a sleeve 3205 is provided at one end of the hinged plug plate 3202, and the sleeve 3205 is sleeved on the outer vertical axis 3204 of the square steel arm 3201, and N protrusions are evenly arranged on the outer circumference of the central tube 2, and each inner vertical axis 3203 is fixed on the protrusion in a one-to-one correspondence, and each hinged plug plate 3202 is inserted into the slide groove of each bracket 31 in a one-to-one correspondence, and each square steel arm 3201 can swing freely within a certain range around the corresponding inner vertical axis 3203, and each hinged plug plate 3202 can swing freely within a certain range around the corresponding outer vertical axis 3204.

[0023] The central tube 2 is also covered with a positioning support sleeve 4, which includes an inner ring 41 and M radially distributed support plates 42. The inner ring 41 is fixed on the central tube 2, and the outer end of the support plate 42 is directly or indirectly in contact with the inner wall 1 of the top of the cyclone separator, and is not connected in any way. The axis of the positioning support sleeve 4 coincides with the axis of the central tube 2, wherein M and N are both positive integers greater than or equal to 3, and M and N can be equal or unequal. Figure 1-6 Here, M and N are both 8.

[0024] Each square steel arm 3201 can swing freely around the corresponding inner vertical axis 3203 within a range of plus or minus 30 degrees, and the outer edge of the side wall at the inner end (close to the end of the center tube) of the square steel arm 3201 plays a limiting role (limiting the swing range).

[0025] Each hinged plug plate 3202 can swing freely around the corresponding outer vertical axis 3204 within a range of plus or minus 30 degrees, and the inner edge of the side wall at the outer end of the square steel arm 3201 plays a limiting role.

[0026] The inner ring 41 of the positioning support sleeve 4 is provided with N notches 43 , and each double-hinged plug plate is inserted into the notches 43 one by one.

[0027] Each protrusion is composed of two upper and lower hanging ears 5. The inner sides of the two hanging ears 5 are arc-shaped and welded to the outer wall of the central tube 2. The two hanging ears 5 are provided with through holes and are sleeved on the corresponding inner vertical shaft 3203 through the through holes.

[0028] Each support plate 42 has an arc-shaped plate 44 at its outer end, and contacts the inner wall 1 of the top of the corresponding cyclone separator through the arc-shaped plate 44 .

Claims

1. An adaptive central tube device for a circulating fluidized bed boiler cyclone separator, comprising a top inner wall of a cyclone separator and a central tube, with N radially distributed support plates welded to the outside of the central tube, characterized in that: Each support plate is an adaptive support plate, which is composed of a bracket and a double-hinged plug plate. The bracket body is in the shape of a rectangular parallelepiped with a slide groove. N brackets are arranged in the equipped cyclone separator and are evenly distributed around the axis of the equipped cyclone separator. The outer ends of the brackets are welded to the inner wall of the top of the equipped cyclone separator. Each double-hinged plug plate includes a square steel arm and a hinged plug plate. The two ends of the square steel wall are respectively provided with an inner vertical axis and an outer vertical axis. One end of the hinged plug plate is provided with a sleeve, and is sleeved on the outer vertical axis of the square steel arm through the sleeve. N protrusions are evenly arranged on the outer circumference of the central cylinder, and each inner vertical axis corresponds to Fixed on the protrusion, each hinged plug plate is inserted into the slide groove of each bracket one by one, each square steel arm can swing freely within a certain range around the corresponding inner vertical axis, and each hinged plug plate can swing freely within a certain range around the corresponding outer vertical axis. A positioning support sleeve is also sleeved on the central tube, and the positioning support sleeve includes an inner ring and M radially distributed support plates. The inner ring is fixed on the central tube, and the outer end of the support plate directly or indirectly contacts the inner wall of the top of the equipped cyclone separator without any connection. The axis center line of the positioning support sleeve coincides with the axis center line of the central tube, wherein M and N are both positive integers greater than or equal to 3.

2. The adaptive central tube device of the circulating fluidized bed boiler cyclone separator according to claim 1, characterized in that: Each protrusion is composed of two upper and lower hanging ears, the inner sides of the two hanging ears are arc-shaped and welded to the outer wall of the central tube. The two hanging ears are provided with through holes and are sleeved on the corresponding inner vertical shafts through the through holes.

3. The adaptive central tube device of the circulating fluidized bed boiler cyclone separator according to claim 1 or 2, characterized in that: Each support plate has an arc-shaped plate at the outer end, and contacts with the inner wall of the top of the equipped cyclone separator through the arc-shaped plate.

4. The adaptive central tube device of the circulating fluidized bed boiler cyclone separator according to claim 1, characterized in that: Each square steel arm can swing freely within a range of plus or minus 30 degrees around the corresponding inner vertical axis, and the outer edge of the side wall at the inner end of the square steel arm plays a limiting role.

5. The adaptive central tube device of the circulating fluidized bed boiler cyclone separator according to claim 1, characterized in that: Each hinged plug plate can swing freely within the range of plus or minus 30 degrees around the corresponding external vertical axis, and the inner edge of the side wall at the outer end of the square steel arm plays a limiting role.

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