CN114234687A

CN114234687A - Fluidized bed heat exchange tube bundle hanger equipment

Info

Publication number: CN114234687A
Application number: CN202111589930.1A
Authority: CN
Inventors: 孙正杨; 李伯奎; 吴成强; 郭威; 许兆美; 蒋素琴
Original assignee: Huaiyin Institute of Technology
Current assignee: Huaiyin Institute of Technology
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-03-25

Abstract

The invention discloses fluidized bed heat exchange tube bundle hanger equipment, which comprises a hoisting frame, a hanging rod and a hoisting device, wherein the hoisting frame is fixed at the top of the fluidized bed equipment and is fixedly connected with one end of the hanging rod; the outer surface of the shaft sleeve is provided with a first connecting end, the first connecting end is provided with a connecting block, and the connecting block is rotatably connected with the steering ball. The connecting block is internally provided with a cavity, a limiting block and a spring are arranged in the cavity, and the connecting piece between the spring, the steering ball and the steering block are matched to compensate the structural change caused by poor installation or expansion with heat and contraction with cold. The invention can ensure the integral stability of the heat exchange tube bundle, simultaneously can avoid the erosion of powder in the fluidized bed equipment to the welding part of the heat exchange tube bundle, and improve the service life and the reliability of the device; and the structure is simple, and the assembly and disassembly are convenient.

Description

Fluidized bed heat exchange tube bundle hanger equipment

Technical Field

The invention relates to a heat exchange tube bundle hanger device, in particular to a hanger device which can stably install a heat exchange tube bundle without welding.

Background

The heat exchange device is one of the most main components in the fluidized bed reactor and consists of a plurality of heat exchange tubes, and heat conducting oil is introduced into the heat exchange tubes to take away redundant heat in the reactor and also can ensure a certain temperature in the reactor to ensure that the reaction can be normally carried out. Heat transfer device is usually through the barrel inner wall upper portion welding hoist and mount frame at fluidized bed reactor, weld jib one end on hoist and mount frame again, the other end then welds and hangs on heat exchanger tube bank and connects, take place to weld inhomogeneous and take place crooked fracture easily during this kind of mode welded heat exchanger tube bank preparation, and all weld manufacturing, to welding equipment technical requirement than higher, and because reaction temperature is higher in the production reaction process, and heat exchanger tube bank is more, the expend with heat and contract with cold extension length of every heat exchanger tube bank and jib is inconsistent, make heat exchanger tube bank position take place to change easily and take place certain relative displacement, because the relative position of welding back tube bank and back-up collar has fixed consequently take place heat exchanger tube bank tear deformation easily, thereby cause whole reaction unit life-span to reduce.

In addition, as the U-shaped pipe of the heat exchange device is connected with the straight pipe section in a welding mode, silicon powder or other powder is blown upwards by high-pressure gas, and the powder can abrade the welding position of the U-shaped pipe, so that the heat exchange pipe is damaged; tiny powder can pile up on U type pipe, influences the heat transfer effect, takes place local overheat easily for the reactant sintering influences whole reaction unit's life-span.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a hanger device which can stably install a heat exchange tube bundle without welding.

The technical scheme is as follows: the fluidized bed heat exchange tube bundle hanger equipment comprises a hanger frame and a hanger rod, wherein the hanger frame is fixed at the top of the fluidized bed equipment and is fixedly connected with one end of the hanger rod; the outer surface of the shaft sleeve is provided with a first connecting end, the first connecting end is provided with a connecting block, and the connecting block is rotatably connected with the steering ball.

The connecting block is provided with a cavity, a limiting block, a first spring and a second spring are arranged in the cavity, a through hole is formed in the lower end face of the cavity, the first spring is abutted between the upper end face of the limiting block and the upper end face of the cavity, the second spring is abutted between the lower end face of the limiting block and the lower end face of the cavity, a second connecting end is arranged on the lower end face of the limiting block, and the second connecting end extends out of the through hole and is detachably connected with the first connecting end.

The upper end face of the cavity is provided with a first boss extending downwards, the upper end face of the second connecting end is provided with a second boss extending upwards, and the first spring is circumferentially arranged along the side surfaces of the first boss and the second boss. The second spring is arranged along the circumferential direction of the side wall of the connecting end. The shaft sleeves are two symmetrical parts, are buckled on the heat exchange tube and are fixed by a fastener. The shape of the shaft sleeve is set according to the shape of an actual hoisting pipeline. And reinforcing ribs are arranged on the inner wall of the shaft sleeve. The connecting block is connected with the steering ball through a chain. The hoisting frame comprises a support ring, a transverse connecting assembly and a longitudinal connecting assembly, wherein the transverse connecting assembly and the longitudinal connecting assembly are fixedly connected into a net structure in the support ring.

Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the heat exchange tube bundle can be fixed without welding, meanwhile, the damage caused by expansion with heat and contraction with cold of the heat exchange tube bundle and the hanger rod can be reduced, and the service life of the heat exchange device can be prolonged; the accumulation of powder can be reduced, the erosion of the powder on the welding part of the U-shaped pipe is avoided, and the service life and the reliability of the device are favorably improved; simple structure and convenient assembly and disassembly.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the hoisting frame of the present invention;

FIG. 3 is a partial cross-sectional view of the lower end of the hanger bar of the present invention;

FIG. 4 is a partial cross-sectional view of the device of the present invention with expansion and contraction of the heat exchanger bundle and hanger rods;

FIG. 5 is a schematic structural diagram of a limiting block of the present invention;

FIG. 6 is a schematic view of the construction of the connector block of the present invention;

FIG. 7 is a schematic view of the external structure of the shaft sleeve sleeved on the U-shaped tube according to the present invention;

FIG. 8 is a schematic view of the internal structure of the sleeve of the present invention disposed on the U-shaped tube;

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

The embodiments shown in fig. 1-8 are applied to a trichlorosilane fluidized bed heat exchange tube bundle.

The corresponding relationship between the components and the reference numbers in the figures is: the lifting device comprises a lifting rod 1, a steering ball 2, an iron chain 3, a connecting block 4, a first spring 5, a gasket 6, a second spring 7, a limiting block 8, a shaft sleeve 9, a threaded sleeve 10, a U-shaped pipe 11, a barrel 12, a lifting frame 13, a lifting device 14, a transverse connecting assembly 15, a supporting ring 16 and a longitudinal connecting assembly 17.

As shown in fig. 1-2, a hoisting frame 13 is fixedly connected with a cylinder 12 of the fluidized bed equipment, one end of a suspender 1 is fixed on the hoisting frame 13, and the hoisting parts of the fluidized bed are all U-shaped pipes 11; the hoisting frame comprises a support ring 16, a transverse connecting assembly 15 and a longitudinal connecting assembly 17, wherein multiple groups of the transverse connecting assemblies 15 and the longitudinal connecting assembly 17 are crossed in the support ring 16 to form a net structure, so that the hoisting frame is used for mounting the suspender 1 on one hand, and the support ring 16 is prevented from deforming on the other hand.

As shown in fig. 3-6, the other end of the boom 1 is rotatably provided with a steering ball 2, and the steering ball 2 is connected with the connecting block 4 by a chain, or in other embodiments, by a rotating rod or the like. A cavity is formed in the connecting block 4, the upper end face of the cavity extends downwards to form a first boss, the lower end face of the cavity is provided with a through hole, a limiting block 8 is arranged in the cavity, the upper end face of the limiting block 8 extends upwards to form a second boss, the sectional areas of the first boss and the second boss are the same, a plurality of first springs 5 are circumferentially arranged in the cavity along the side faces of the two bosses, the first springs 5 are abutted between the top face of the cavity and the upper end face of the limiting block 8, a gasket 16 with a buffering effect is arranged on the end face of the first boss, the gasket 16 is made of an elastic material and is used for playing a buffering effect when the first springs 5 are compressed until the end faces of the two bosses are contacted, and the structure of the first springs is prevented from being damaged; a second connecting end extends downwards from the lower end face of the limiting block 8 and extends out of the through hole to be connected with the shaft sleeve 9; a plurality of second springs 7 are arranged along the circumferential direction of the side surface of the connecting end, and the second springs 7 are abutted between the lower end face of the limiting block 8 and the bottom face of the cavity. Since the suspension point is a U-shaped tube, the sleeve 9 is arranged in a U-shape, but in other embodiments, the sleeve 9 may also be arranged in a straight tube shape, such as with a suspension point on a straight tube section. As shown in fig. 5, a positioning hole for positioning the first spring 5 is provided on the upper end surface of the stopper 8.

The shaft sleeve 9 is structurally composed of two symmetrical shells, the two shells are buckled on a heat exchange pipeline and fixed by a connecting piece, and reinforcing ribs are arranged on the inner wall of the two shells; as shown in fig. 3 and fig. 7-8, the shaft sleeve 9 in this embodiment is U-shaped, the shaft sleeve 9 is provided with a first connecting end with a circular cross section, the first connecting end is provided with an external thread, and can be fastened externally by a threaded sleeve 10 after being fastened, and the side surface of the housing is also provided with a connecting lug, the connecting lug is provided with a through hole, and the housing can be fastened by a bolt or a positioning pin. The surface opposite to the first connecting end is provided with a groove for accommodating the second connecting end; through holes are formed in the groove and the second connecting end, and the second connecting end extends into the groove and is fastened at the through holes through bolts or positioning pins and the like.

The working principle of the invention is as follows: the shaft sleeve 9 is sleeved on the heat exchange pipeline, so that erosion of silicon powder or other powder to the heat exchange pipeline, particularly the welding part of the U-shaped pipe is avoided, and meanwhile, fine silicon powder or other powder is only accumulated on the shaft sleeve and does not influence the heat exchange effect of the U-shaped pipe. Because the heat exchange tube bundle is manually installed, the installation difference of the heat exchange tube bundle in a small range on a vertical plane is compensated by the second spring 7. When the fluidized bed works, the lengths of the heat exchange tube bundle and the hanger rod which are expanded with heat and contracted with cold are inconsistent, and the lengths can be adjusted by the first spring 5. In addition, the thermal expansion and cold contraction extension length of the heat exchange tube bundle and the suspender is not necessarily in the vertical direction and tends to left or right, the direction is adjusted through the steering ball 2, the connecting piece between the steering ball 2 and the first connecting end and the first spring 5, and the phenomenon that the thermal expansion and cold contraction extension length of the heat exchange tube bundle and the suspender 1 is too large to cause other heat exchange tube bundles to generate too large angle change is avoided, so that the overall stability of the heat exchange device is ensured.

Claims

1. A fluidized bed heat exchange tube bundle hanger device comprises a hanger frame (13) and a hanger rod (1), wherein the hanger frame (13) is fixed at the top of the fluidized bed device and is fixedly connected with one end of the hanger rod (1), and the fluidized bed heat exchange tube bundle hanger device is characterized by further comprising a hanging device (14), and the hanging device (14) comprises a shaft sleeve (9) sleeved on a heat exchange device pipeline and a steering ball (2) rotatably arranged at the other end of the hanger rod (1); the outer surface of the shaft sleeve (9) is provided with a first connecting end, the first connecting end is provided with a connecting block (4), and the connecting block (4) is rotatably connected with the steering ball (2).

2. The fluidized bed heat exchange tube bundle hanger apparatus according to claim 1, wherein a cavity is formed in the connecting block (4), a limiting block (8), a first spring (5) and a second spring (7) are disposed inside the cavity, a through hole is formed in the lower end surface of the cavity, the first spring (5) abuts between the upper end surface of the limiting block (8) and the upper end surface of the cavity, the second spring (7) abuts between the lower end surface of the limiting block (8) and the lower end surface of the cavity, a second connecting end is disposed on the lower end surface of the limiting block (8), and the second connecting end extends out of the through hole and is detachably connected with the first connecting end.

3. The fluidized bed heat exchange tube bundle hanger apparatus according to claim 2, wherein the upper end surface of the cavity has a first boss extending downward, the upper end surface of the second connection end has a second boss extending upward, and the first spring (5) is circumferentially disposed along side surfaces of the first boss and the second boss.

4. The fluidized bed heat exchanger tube bundle hanger apparatus according to claim 3, wherein the first bosses are provided with a cushioning spacer (6) on an end surface thereof.

5. The fluidized bed heat exchanger tube bundle hanger apparatus according to claim 2, wherein the second spring (7) is circumferentially disposed along the attachment end side wall.

6. The fluidized bed heat exchange tube bundle hanger apparatus according to claim 1, wherein the boss (9) is comprised of two part shells of identical construction, said shells snap-fitted over the heat exchange tubes and secured with fasteners.

7. Fluidized bed heat exchanger tube bundle hanger apparatus according to claim 6, characterized in that the shape of the bushing (9) is arranged according to the shape of the actual hoisting pipe.

8. Fluidized bed heat exchanger tube bundle hanger apparatus according to claim 6, characterized in that the inner wall of the boss (9) is provided with reinforcing ribs.

9. The fluidized bed heat exchanger tube bundle hanger apparatus according to claim 1, wherein the connecting block (4) is connected with the turning ball (2) by a chain (3).

10. A fluidized bed heat exchanger tube bundle hanger apparatus according to claim 1, wherein the hanger frame (13) comprises a support ring (16), transverse connection assemblies (15) and longitudinal connection assemblies (17), the transverse connection assemblies (15) and the longitudinal connection assemblies (17) being fixedly connected in a net structure within the support ring (16).