Fluidized bed device

Abstract

The invention relates to a fluidized bed device which comprises an upper tube box, an upper shell ring, a lower shell ring and a lower tube box, a plurality of heat exchange tubes are arranged in a shell, a supporting skirt is arranged below the lower tube box, a detachable gas distribution plate structure is arranged below the heat exchange tubes in the shell, and a gas distribution plate is arranged below the gas distribution plate structure. The detachable gas distribution plate structure comprises a supporting seat, a supporting beam, a lower supporting ring, an upper limiting ring and a plurality of gas distribution plate strip blocks, the supporting seat, the lower supporting ring and the upper limiting ring are welded to the inner wall of the shell, the supporting beam is supported on the supporting seat, and the supporting beam and the supporting seat are connected through a fixing piece. The edges of a plurality of gas distribution plate strip blocks are clamped between the lower supporting ring and the upper limiting ring, the plurality of gas distribution plate strip blocks are spliced together to form a whole gas distribution plate, the gas distribution plate is supported on the supporting beam through a plurality of cushion blocks, a manhole is formed in the position, close to the gas distribution plate, of the shell, and the gas distribution plate is arranged in the manhole. Therefore, the maintenance efficiency is greatly improved.

Description

[Technical field]

[0001] The invention relates to the field of reactors, in particular to a fluidized bed device. [Background technology]

[0002] Fluidized bed, abbreviated as fluidized bed, is a reactor that uses gas or liquid to pass through a granular solid layer to put solid particles in a suspended motion state and carry out a gas-solid phase reaction process or a liquid-solid phase reaction process.

[0003] See also Figure 1 , Figure 1 A fluidized bed device in the prior art is disclosed, comprising: an upper tube box 1', an upper cylinder section 2', a lower cylinder section 3' and a lower tube box 4', wherein the lower cylinder section 3' is provided with a plurality of heat exchange tubes 5', a first flange 6' is provided at the bottom of the lower cylinder section 3', a second flange 7' is provided above the lower tube box 4', a gas distribution plate 8' is sandwiched between the first flange 6' and the second flange 7', the first flange 6' and the second flange 7' are connected by a fixing member, and the entire device is supported on a frame by an ear seat 9'. The disadvantages of the fluidized bed device of this structure are as follows: The disadvantage is that since the gas distribution plate 8' is a whole plate structure, and the whole plate is clamped between the first flange 6' and the second flange 7', when the gas distribution plate 8' needs to be repaired, the entire lower pipe box 4' needs to be removed. Therefore, sufficient space needs to be left under the equipment to remove the lower pipe box 4'. In addition, since the gas distribution plate 8' is a whole plate structure, installation and disassembly require large lifting equipment, which is time-consuming and labor-intensive. Therefore, we are thinking about how to improve this traditional fluidized bed structure to overcome the above-mentioned defects. [Summary of the invention]

[0004] In order to solve the above problems, an object of the present invention is to provide a fluidized bed device which can improve maintenance efficiency and reduce maintenance costs.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a fluidized bed device, comprising: an upper pipe box, an upper cylinder section, a lower cylinder section and a lower pipe box, wherein the upper pipe box, the upper cylinder section, the lower cylinder section and the lower pipe box are welded to each other to form a shell of the fluidized bed device, wherein a plurality of heat exchange tubes are arranged in the shell, and the characteristic is that: a support skirt is arranged below the lower pipe box, and a detachable gas distribution plate structure is arranged below the heat exchange tube in the shell, and the detachable gas distribution plate structure comprises: a support seat, a support beam, a lower support ring, an upper limit ring and A plurality of gas distribution plate strip blocks, the support seat, the lower support ring and the upper limit ring are respectively welded to the inner wall of the shell, the lower support ring is located between the support seat and the upper limit ring, the support beam is supported on the support seat and the two are connected by a fixing piece, the edges of a plurality of gas distribution plate strip blocks are clamped between the lower support ring and the upper limit ring, a plurality of gas distribution plate strip blocks are assembled together to form a whole gas distribution plate, the gas distribution plate is supported on the support beam by a plurality of pads, and the shell is provided with a manhole at a position adjacent to the gas distribution plate.

[0006] Preferably, a fluidized bed device in the present invention is further configured as follows: a splicing structure is provided between each two adjacent gas distribution plate blocks, and the splicing structure includes: a first snap-in protrusion and a first snap-in groove provided on one of the gas distribution plate blocks, and a second snap-in protrusion and a second snap-in groove provided on the other gas distribution plate block, the first snap-in protrusion cooperates with the second snap-in groove, and the first snap-in groove cooperates with the second snap-in protrusion.

[0007] Preferably, a fluidized bed device in the present invention is further configured as follows: the gas distribution plate block is provided with a plurality of evenly distributed through holes.

[0008] Preferably, a fluidized bed device in the present invention is further configured as follows: the support beam is an I-shaped steel.

[0009] Preferably, a fluidized bed device in the present invention is further configured as follows: the number of the support beams is two, and the two support beams are arranged in parallel.

[0010] Preferably, a fluidized bed device in the present invention is further configured as follows: the number of the support seats is four.

[0011] Preferably, a fluidized bed device in the present invention is further configured as follows: the fixing members are bolts and nuts.

[0012] Preferably, a fluidized bed device in the present invention is further configured as follows: the support seat, support beam, lower support ring, upper limit ring, gas distribution plate block, and cushion block are all made of carbon steel material.

[0013] Preferably, a fluidized bed device in the present invention is further configured such that: a plurality of cushion blocks are evenly arranged.

[0014] Preferably, a fluidized bed device in the present invention is further configured as follows: the manhole is a waist-shaped manhole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention designs the gas distribution plate as a multi-piece assembly structure, so that when the gas distribution plate is inspected, each gas distribution plate strip can be inspected and taken out from the manhole, thereby avoiding the use of large lifting equipment as in the prior art, thereby greatly improving the inspection efficiency and reducing the inspection cost. In addition, the present invention designs the gas distribution plate as a multi-piece assembly structure, so the corresponding shell can also be designed as an integrated welded structure, and the support structure of the shell can also be designed as a skirt support structure, thereby effectively reducing the frame cost of the equipment support while improving the shell strength.

Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the structure of a fluidized bed device in the prior art.

[0017] Figure 2 It is a schematic structural diagram of the fluidized bed device in the present invention.

[0018] Figure 3 It is a schematic front view of the detachable gas distribution plate structure in the present invention.

[0019] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0020] Figure 5 A top view schematic diagram of the detachable gas distribution plate structure of the present invention

[0021] Figure 6 It is a schematic cross-sectional view of several gas distribution plate blocks in the present invention.

[0022] Figure 7 It is a cross-sectional schematic diagram of two adjacent gas distribution plate blocks in the present invention.

[0023] Figure 1 Middle: 1`, upper pipe box, 2`, upper cylinder section, 3`, lower cylinder section, 4`, lower pipe box, 5`, heat exchange tube, 6`, first flange, 7`, second flange, 8`, gas distribution plate, 9`, ear seat.

[0024] Figures 2 to 7In: 1. upper pipe box, 10. gas pre-distributor, 11. feed port, 12. discharge port, 2. upper cylinder section, 3. lower cylinder section, 4. lower pipe box, 5. heat exchange tube, 6. support skirt, 7. detachable gas distribution plate structure, 70. support seat, 71. support beam, 72. lower support ring, 73. upper limit ring, 74. gas distribution plate strip block, 740. through hole, 741. cushion block, 75. fixing part, 76. first snap-on protrusion, 77. first snap-on groove, 78. second snap-on protrusion, 79. second snap-on groove, 8. manhole. [Specific implementation method]

[0025] The fluidized bed device of the present invention is further described in detail below through specific embodiments.

[0026] Ginseng Figures 2 to 7 As shown, a fluidized bed device comprises: an upper pipe box 1, an upper cylinder section 2, a lower cylinder section 3 and a lower pipe box 4, wherein the upper pipe box 1, the upper cylinder section 2, the lower cylinder section 3 and the lower pipe box 4 are welded to each other to form a shell of the fluidized bed device, a gas pre-distributor 10 and a feed port 11 are provided below the shell 1, a discharge port 12 is provided above the shell, a plurality of heat exchange tubes 5 are provided in the shell, the free ends of the heat exchange tubes 5 pass through the shell and extend out of the shell, a support skirt 6 is provided below the lower pipe box 4, a detachable gas distribution plate structure 7 is provided below the heat exchange tubes 5 in the shell, the detachable gas distribution plate structure 7 comprises: a support seat 70, a support beam 71, a lower support ring 72, an upper limit ring 73 and a plurality of gas distribution plate strip blocks 74, in this embodiment, the number of the gas distribution plate strip blocks 74 is seven, and each gas distribution plate strip block 74 is provided with a plurality of evenly distributed through holes 740 for gas to pass through.

[0027] The support seat 70, the lower support ring 72 and the upper limit ring 73 are respectively welded to the inner wall of the shell, the lower support ring 72 is located between the support seat 70 and the upper limit ring 73, the support beam 71 is supported on the support seat 70 and the two are connected by a fixing member 75. In the present embodiment, the fixing member 75 is a bolt and a nut, the support beam 71 is an I-shaped steel, the number of the support beams 71 is two, and the two support beams 71 are arranged in parallel, and the number of the support seats 70 is four. Of course, in other embodiments, the number of the support beams 71 and the support seats 70 can be determined according to specific needs. The edges of the seven gas distribution plate strip blocks 74 are clamped between the lower support ring 72 and the upper limit ring 73, and the seven gas distribution plate strip blocks 74 are assembled together to form a whole gas distribution plate. In the present embodiment, they are specifically spliced ​​as follows: a splicing structure is provided between each two adjacent gas distribution plate strip blocks 74, and the splicing structure includes: a first snap protrusion 76 and a first snap groove 77 provided on one of the gas distribution plate strip blocks 74, and a second snap protrusion 78 and a second snap groove 79 provided on the other gas distribution plate strip block 74, the first snap protrusion 76 cooperates with the second snap groove 79, and the first snap groove 77 cooperates with the second snap protrusion 78.

[0028] The gas distribution plate is supported on the support beam 71 by a plurality of pads 741, and the pads 741 are evenly arranged. The pads 741 are set because: if the gas distribution plate is directly supported on the support beam 71, the contact area between the gas distribution plate and the support beam 71 will inevitably be large, which will cause many through holes 740 on the gas distribution plate to be blocked, thereby affecting the circulation of gas. However, the present invention provides a plurality of pads 741 between the gas distribution plate and the support beam 71, so that only the part of the through holes in contact with the pads 741 is blocked, and the rest of the through holes are not blocked, thereby greatly improving the gas circulation efficiency. The support seat 70, support beam 71, lower support ring 72, upper limit ring 73, gas distribution plate strip block 74, and pads 741 are all made of carbon steel material, so they have good corrosion resistance. The shell is provided with a manhole 8 at a position adjacent to the gas distribution plate. In the present embodiment, the manhole 8 is a waist-shaped manhole. When the gas distribution plate needs to be inspected, the worker disassembles the gas distribution plate into gas distribution plate strip blocks 74 in the shell, and then takes out each gas distribution plate strip block 74 from the manhole 8 for inspection. After the inspection is completed, the gas distribution plate strip blocks 74 are taken out from the manhole 8 into the shell to be assembled into a whole gas distribution plate.

[0029] The working principle of the fluidized bed device in the present invention is as follows: the gas enters from the feed port 11 at the bottom of the shell, and then is evenly distributed upward through the gas pre-distributor 10, and then the gas passes through a plurality of through holes 740 on the gas distribution plate and enters the catalyst layer, and then reacts with the catalyst, and finally exits from the discharge port 12 at the top of the shell. Cooling water is passed through the heat exchange tube 5, and the heat generated during the gas reaction can be taken away by heat exchange in the heat exchanger 5.

[0030] In summary, the present invention designs the gas distribution plate as a multi-piece assembly structure, so that when the gas distribution plate is inspected, each gas distribution plate strip can be inspected and inspected through the manhole, thereby avoiding the use of large lifting equipment as in the prior art, thereby greatly improving the inspection efficiency and reducing the inspection cost. In addition, the present invention designs the gas distribution plate as a multi-piece assembly structure, and the corresponding shell can also be designed as an integrated welded structure, and the support structure of the shell can also be designed as a skirt support structure, thereby effectively reducing the frame cost of the equipment support while improving the shell strength.

[0031] The above-mentioned embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A fluidized bed apparatus, comprising: The upper pipe box, the upper cylinder section, the lower cylinder section and the lower pipe box are welded to each other to form a shell of a fluidized bed device, wherein a plurality of heat exchange tubes are arranged in the shell, and the characteristic is that a supporting skirt is arranged under the lower pipe box, and a detachable gas distribution plate structure is arranged under the heat exchange tube in the shell, and the detachable gas distribution plate structure comprises: a supporting seat, a supporting beam, a lower supporting ring, an upper limiting ring and a plurality of gas distribution plate strip blocks, the supporting seat, the lower supporting ring and the upper limiting ring are respectively welded to the inner wall of the shell, the lower supporting ring is located between the supporting seat and the upper limiting ring, the supporting beam is supported on the supporting seat and the two are connected by a fixing part, the edges of a plurality of gas distribution plate strip blocks are clamped between the lower supporting ring and the upper limiting ring, and a plurality of gas distribution plate strip blocks are assembled together to form a whole gas distribution plate, the gas distribution plate is supported on the supporting beam by a plurality of pads, and a manhole is provided in the shell at a position adjacent to the gas distribution plate.

2. A fluidized bed device according to claim 1, characterized in that: A splicing structure is provided between each two adjacent gas distribution plate blocks, and the splicing structure includes: a first snap-in protrusion and a first snap-in groove provided on one of the gas distribution plate blocks, and a second snap-in protrusion and a second snap-in groove provided on the other gas distribution plate block, the first snap-in protrusion cooperates with the second snap-in groove, and the first snap-in groove cooperates with the second snap-in protrusion.

3. A fluidized bed device according to claim 1, characterized in that: The gas distribution plate strip block is provided with a plurality of evenly distributed through holes.

4. A fluidized bed apparatus as claimed in claim 1, characterized in that: The support beam is an I-shaped steel.

5. A fluidized bed device according to claim 1, characterized in that: The number of the support beams is two, and the two support beams are arranged in parallel.

6. A fluidized bed apparatus as claimed in claim 1, characterized in that: The number of the supporting seats is four.

7. A fluidized bed apparatus according to claim 1, characterized in that: The fixing parts are bolts and nuts.

8. A fluidized bed apparatus as claimed in claim 1, characterized in that: The support seat, support beam, lower support ring, upper limit ring, gas distribution plate block and cushion block are all made of carbon steel material.

9. A fluidized bed apparatus as claimed in claim 1, characterized in that: Several pads are evenly arranged.

10. A fluidized bed device according to claim 1, characterized in that: The manhole is a waist-shaped manhole.

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