A steam generator for a calcined coke hopper

Abstract

The present invention relates to the technical field of auxiliary devices for heat exchange equipment, and particularly to a steam generator for calcined coke hoppers; it can ensure welding quality, have higher heat exchange efficiency, smooth discharging, and avoid cold bridging during discharging; it includes an upper flange, a lower flange, an upper header, multiple groups of heat exchange tubes, and a lower header. The upper header includes four groups of first 90-degree elbows and four groups of first straight pipes. The lower header includes four groups of second 90-degree elbows and four groups of second straight pipes. The four groups of first 90-degree elbows and the four groups of first straight pipes are welded into a square ring shape, and the four groups of second 90-degree elbows and the four groups of second straight pipes are welded into a square ring shape. The bottom end of the upper header is provided with multiple groups of uniformly arranged first mounting holes. The top and bottom ends of the multiple groups of heat exchange tubes are straight pipe sections. The top end of the lower header is provided with multiple groups of uniformly arranged second mounting holes. The front and rear ends of the cuboid-shaped cage body are tapered from bottom to top, and the left and right ends of the rectangular cage body are tapered from bottom to top.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary devices for heat exchange equipment, and particularly to a steam generator for a calcined coke hopper. Background Art

[0002] As is well known, after petroleum coke is calcined in a pot-type calciner, the temperature of the material body is above 1000°C at this time. Directly discharging the material downward has too high a temperature and is not easy to collect. Currently, it is mostly to use circulating water through a jacketed heat exchanger to cool the material, so that the material is discharged and collected after approaching room temperature. After the water is heated, it is cooled again through a cooling tower or a cooling pond to be recycled. In this way, a large amount of heat is directly discharged into the atmosphere. At present, a small number of enterprises also use a water pipe heat exchanger to absorb this part of the heat of the material to generate steam for utilization, but there are many technical problems. The welding quality of the equipment is not easy to guarantee. In the currently designed water pipe heat exchanger, the connection form between the pipe and the header is an oblique insertion interface. The diameter of the pipe holes drilled in the header needs to be much larger than the pipe to ensure that the pipe can be inserted into the header. The gap between the pipe hole and the pipe is relatively large, and welding is difficult, so the welding quality is difficult to guarantee, resulting in leakage at the weld during operation and poor heat exchange effect of the equipment; after the currently designed water pipe heat exchanger generates steam and exchanges heat, since the heat exchange temperature difference is smaller than that during water cooling heat exchange, the heat exchange efficiency is reduced, so that the final discharge temperature is relatively high, which is not conducive to collection; the equipment is not convenient to replace. This equipment is installed in a very small space and works in a high-temperature area. In the currently designed water pipe heat exchanger, the upper flange is directly connected to the bottom flange of the calciner through bolts. When disassembly is required, due to space limitations, a special lengthened tool is needed for disassembly, and the disassembly is extremely inconvenient, affecting the discharge of calcined coke; in order to enhance heat exchange in some of the currently designed water pipe heat exchangers, a tube bundle heat exchange surface is added in the middle of the equipment, but this blocks the discharge of calcined coke and affects the output; in order to facilitate equipment processing, some arrange the heat exchange pipes vertically up and down to form a barrel structure, but this easily causes bridging of the calcined coke during cooling, further affecting the output of calcined coke. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a steam generator for a calcined coke hopper that can ensure welding quality in terms of structure, has higher heat exchange efficiency, smooth discharge, and avoids bridging of the discharged material due to cooling.

[0004] The calcined coke hopper steam generator of the present invention comprises an upper flange, a lower flange, an upper header, multiple groups of heat exchange tubes and a lower header. The upper header includes four groups of first 90-degree elbows and four groups of first straight pipes. The lower header includes four groups of second 90-degree elbows and four groups of second straight pipes. The four groups of first 90-degree elbows and the four groups of first straight pipes are welded into a square ring shape. The four groups of second 90-degree elbows and the four groups of second straight pipes are welded into a square ring shape. The bottom end of the upper header is provided with multiple groups of uniformly arranged first mounting holes. The top and bottom ends of the multiple groups of heat exchange tubes are straight pipe sections. The top end of the lower header is provided with multiple groups of uniformly arranged second mounting holes. The top ends of the multiple groups of heat exchange tubes are respectively inserted from the bottom end of the upper header into the first mounting holes. The top ends of the multiple groups of heat exchange tubes are fixedly welded to the upper header. The bottom ends of the multiple groups of heat exchange tubes are fixedly welded to the lower header. The multiple groups of heat exchange tubes are internally connected to both the upper header and the lower header. The multiple groups of heat exchange tubes surround to form a cuboid cage shape. The front and rear ends of the cuboid cage shape are tapered from bottom to top. The left and right ends of the rectangular cage shape are tapered from bottom to top. The bottom end of the upper flange is fixedly welded to the top end of the upper header. The top end of the lower flange is fixedly welded to the top end of the lower header.

[0005] In the calcined coke hopper steam generator of the present invention, a middle flange is provided on the upper part of the multiple groups of heat exchange tubes, and multiple groups of fastening bolts are provided between the upper flange and the middle flange.

[0006] In the calcined coke hopper steam generator of the present invention, vertical fin sheets are provided on the heat exchange tubes.

[0007] In the calcined coke hopper steam generator of the present invention, a water inlet pipe is provided at the right end of the lower header, and the output end of the water inlet pipe is internally connected to the lower header. A water vapor discharge pipe is provided at the left end of the upper header, and the input end of the water vapor discharge pipe is internally connected to the upper header.

[0008] In the calcined coke hopper steam generator of the present invention, a blowdown pipe is provided at the left part of the bottom end of the lower header, and the input end of the blowdown pipe is internally connected to the lower header.

[0009] In the calcined coke hopper steam generator of the present invention, multiple groups of uniformly distributed strengthening connection pieces are provided between the upper flange and the middle flange.

[0010] In the calcined coke hopper steam generator of the present invention, diaphragms are provided between the multiple groups of heat exchange tubes.

[0011] The beneficial effects of the present invention compared with the prior art are as follows: By connecting the upper flange to the lower opening of the calciner body, the petroleum coke after calcination in the calciner body is discharged into the upper header and falls into a cuboid-shaped cage body formed by multiple groups of heat exchange tubes. At this time, cold water is introduced into the lower header and enters the upper header through multiple groups of heat pipe tubes to cool the discharged material. The front end and the rear end of the cuboid-shaped cage body are tapered from top to bottom, and the left end and the right end of the cuboid-shaped cage body are flared. The tapered setting of the front end and the rear end of the cuboid-shaped cage body from top to bottom can compress the material in the device and extend the residence time of the material in the device, so as to better conduct heat exchange. When the material suddenly shows a tendency to collapse during cooling, through the flared setting of the left end and the right end of the cuboid-shaped cage body from top to bottom, the material can be quickly fluffed up, effectively preventing the material from bridging. At the same time, the cold water is utilized after heat exchange, which is more energy-saving and environmentally friendly. By setting the top and bottom ends of multiple groups of heat exchange tubes as straight pipe sections, the top ends of multiple groups of heat exchange tubes can be vertically inserted into the first installation holes on the upper header, and the bottom ends of multiple groups of heat exchange tubes can be vertically inserted into the second installation holes on the lower header, reducing the gap between the heat exchange tubes and the first installation holes and the second installation holes, and ensuring the welding quality from the structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0013] Figure 2 is a front view structural schematic diagram of the present invention;

[0014] Figure 3 is of the present invention Figure 2 left view sectional structural schematic diagram at A-A in;

[0015] Figure 4 is of the present invention Figure 2 upper header structural schematic diagram of the B-B top view section in;

[0016] Figure 5 is an upper header structural schematic diagram of the present invention;

[0017] Reference numerals in the drawings: 1, upper flange; 2, lower flange; 3, upper header; 4, heat exchange tube; 5, lower header; 6, first 90-degree elbow; 7, first straight pipe; 8, second 90-degree elbow; 9, second straight pipe; 10, straight pipe section; 11, middle flange; 12, fastening bolt; 13, vertical rib; 14, water inlet pipe; 15, water vapor discharge pipe; 16, sewage discharge pipe; 17, strengthening connecting piece; 18, diaphragm. DETAILED DESCRIPTION OF THE INVENTION

[0018] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0019] As shown Figures 1 to 5 in the figure, the calcined coke hopper steam generator of the present invention includes an upper flange 1, a lower flange 2, an upper header 3, multiple groups of heat exchange tubes 4 and a lower header 5. The upper header 3 includes four groups of first 90-degree elbows 6 and four groups of first straight pipes 7. The lower header 5 includes four groups of second 90-degree elbows 8 and four groups of second straight pipes 9. The four groups of first 90-degree elbows 6 and the four groups of first straight pipes 7 are welded into a square ring shape. The four groups of second 90-degree elbows 8 and the four groups of second straight pipes 9 are welded into a square ring shape. The bottom end of the upper header 3 is provided with multiple groups of uniformly arranged first mounting holes. The top and bottom ends of multiple groups of heat exchange tubes 4 are straight pipe sections 10. The top end of the lower header 5 is provided with multiple groups of uniformly arranged second mounting holes. The top ends of multiple groups of heat exchange tubes 4 are respectively inserted into the first mounting holes from the bottom end of the upper header 3. The top ends of multiple groups of heat exchange tubes 4 are fixedly welded to the upper header 3. The bottom ends of multiple groups of heat exchange tubes 4 are fixedly welded to the lower header 5. Multiple groups of heat exchange tubes 4 are internally connected to both the upper header 3 and the lower header 5. Multiple groups of heat exchange tubes 4 are arranged to form a cuboid cage-like body. The front and rear ends of the cuboid cage-like body are tapered from bottom to top. The left and right ends of the rectangular cage-like body are tapered from bottom to top. The bottom end of the upper flange 1 is fixedly welded to the top end of the upper header 3. The top end of the lower flange 2 is fixedly welded to the top end of the lower header 5. By connecting the upper flange to the lower opening of the calciner furnace body, the petroleum coke calcined in the calciner furnace body is discharged into the upper header and falls into the cuboid cage-like body formed by multiple groups of heat exchange tubes. At this time, cold water is introduced into the lower header and enters the upper header through multiple groups of tube heat pipes to cool the discharged material. The front and rear ends of the cuboid cage-like body are tapered from top to bottom. The left and right ends of the cuboid cage-like body are tapered. The tapered setting of the front and rear ends of the cuboid cage-like body from top to bottom can compress the material in the device and extend the residence time of the material in the device, so as to better conduct heat exchange. When the material suddenly shows a tendency to collapse during cooling, through the tapered setting of the left and right ends of the cuboid cage-like body from top to bottom, the material can be quickly fluffed up, effectively preventing material bridging. At the same time, the cold water is utilized after heat exchange, which is more energy-saving and environmentally friendly. By setting the top and bottom ends of multiple groups of heat exchange tubes as straight pipe sections, the top ends of multiple groups of heat exchange tubes can be vertically inserted into the first mounting holes on the upper header, and the bottom ends of multiple groups of heat exchange tubes can be vertically inserted into the second mounting holes on the lower header, reducing the gap between the heat exchange tubes and the first and second mounting holes, and ensuring the welding quality from the structural design.

[0020] In the calcined coke hopper steam generator of the present invention, a middle flange 11 is provided above multiple groups of heat exchange tubes 4. Multiple groups of fastening bolts 12 are provided between the upper flange 1 and the middle flange 11. The fastening bolts that should be originally at the connection between the upper flange of the heat exchanger and the furnace bottom flange are led to the middle of the equipment for fastening, avoiding the situation of high-temperature area of the upper flange and inconvenient operation due to narrow operation space, and facilitating the disassembly and replacement of the equipment.

[0021] For the calcined coke hopper steam generator of the present invention, vertical fins 13 are provided on the heat exchange tubes 4; the provision of the vertical fins can increase the extended heating area and improve the heat exchange efficiency.

[0022] For the calcined coke hopper steam generator of the present invention, a water inlet pipe 14 is provided at the right end of the lower header 5, and the output end of the water inlet pipe 14 communicates with the inside of the lower header 5. A water and vapor discharge pipe 15 is provided at the left end of the upper header 3, and the input end of the water and vapor discharge pipe 15 communicates with the inside of the upper header 3; cold water can be introduced into the lower header through the water inlet pipe, and the water and vapor after absorbing heat can be discharged through the water and vapor discharge pipe. Connect the external cold water source pipe to the water inlet pipe and connect the external recovered heat source pipe to the water and vapor discharge pipe to utilize the waste heat.

[0023] For the calcined coke hopper steam generator of the present invention, a blowdown pipe 16 is provided at the left part of the bottom end of the lower header 5, and the input end of the blowdown pipe 16 communicates with the inside of the lower header 5; the dirt inside the device can be discharged through the blowdown pipe to prevent the situation where the heat exchange tubes and the like are blocked due to the accumulation of dirt inside the device.

[0024] For the calcined coke hopper steam generator of the present invention, multiple groups of uniformly distributed strengthening connection pieces 17 are provided between the upper flange 1 and the middle flange 11; the provision of the strengthening connection pieces can make the connection structure between the upper flange and the middle flange more solid.

[0025] For the calcined coke hopper steam generator of the present invention, diaphragms 18 are provided between multiple groups of heat exchange tubes 4; the provision of the diaphragms can prevent the material from overflowing between multiple groups of heat exchange tubes.

[0026] The steam generator of the calcined coke hopper of the present invention, when it is working, before completing the above actions, it first moves to the position required by the user. By connecting the upper flange to the lower opening of the calcined furnace body, the calcined petroleum coke in the calcined furnace body is discharged into the upper header and falls into the cuboid-shaped cage body formed by multiple groups of heat exchange tubes. At this time, cold water is introduced into the lower header and enters the upper header through multiple groups of tube heat pipes to cool the discharged material. The front end and the rear end of the cuboid-shaped cage body are tapered from top to bottom, and the left end and the right end of the cuboid-shaped cage body are tapered outwards. The tapered setting of the front end and the rear end of the cuboid-shaped cage body from top to bottom can compress the material in the device and extend the residence time of the material in the device, so as to better conduct heat exchange. When the material suddenly shows a tendency to collapse during cooling, through the tapered setting of the left end and the right end of the cuboid-shaped cage body from top to bottom, the material can be quickly fluffed up, effectively preventing the material from bridging. At the same time, the cold water is used after heat exchange, which is more energy-saving and environmentally friendly. By setting the top and bottom ends of multiple groups of heat exchange tubes as straight pipe sections, the top ends of multiple groups of heat exchange tubes can be vertically inserted into the first installation holes on the upper header, and the bottom ends of multiple groups of heat exchange tubes can be vertically inserted into the second installation holes on the lower header, reducing the gaps between the heat exchange tubes and the first installation holes and the second installation holes, and ensuring the welding quality from the structural design; the fastening bolts that should have been at the connection between the upper flange of the heat exchanger and the furnace bottom flange are led to the middle of the equipment for fastening, avoiding the situation of high-temperature area of the upper flange and inconvenient operation due to the narrow operation space, and facilitating the disassembly and replacement of the equipment; through the setting of vertical rib fins, the extended heating area can be increased and the heat exchange efficiency can be improved; cold water can be introduced into the lower header through the water inlet pipe, and the heated water vapor can be discharged through the water vapor discharge pipe. The external cold water source pipe is connected to the water inlet pipe, and the external recovered heat source pipe is connected to the water vapor discharge pipe to utilize the waste heat; the dirt in the device can be discharged through the blowdown pipe to prevent the situation that the dirt accumulates in the device and blocks the heat exchange tubes, etc.; through the setting of the strengthening connecting piece, the connection structure between the upper flange and the middle flange can be made more firm; through the setting of the diaphragm, the material can be prevented from overflowing between multiple groups of heat exchange tubes.

[0027] For the steam generator of the calcined coke hopper of the present invention, the installation methods, connection methods or setting methods of all the above components are common mechanical methods, and the specific structures, models and coefficient indexes of all its components are its own technologies. As long as the beneficial effects can be achieved, they can be implemented, so no more details will be given.

[0028] For the steam generator of calcined coke hopper of the present invention, unless otherwise specified, directional terms such as "up and down, left and right, front and back, inside and outside, vertical and horizontal" included in the terms only represent the directions of the terms in the normal use state, or the common names understood by those skilled in the art, and should not be regarded as a limitation of the terms. At the same time, numerical terms such as "first", "second" and "third" do not represent specific quantities and orders, but are only used for name distinction.

[0029] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A steam generator for a calcined coke hopper, characterized in that, It includes an upper flange (1), a lower flange (2), an upper header (3), multiple groups of heat exchange tubes (4), and a lower header (5). The upper header (3) includes four groups of first 90-degree elbows (6) and four groups of first straight pipes (7). The lower header (5) includes four groups of second 90-degree elbows (8) and four groups of second straight pipes (9). The four groups of first 90-degree elbows (6) and the four groups of first straight pipes (7) are welded into a square ring shape. The four groups of second 90-degree elbows (8) and the four groups of second straight pipes (9) are welded into a square ring shape. The bottom end of the upper header (3) is provided with multiple groups of uniformly arranged first mounting holes. The top and bottom ends of the multiple groups of heat exchange tubes (4) are straight pipe sections (10). The top end of the lower header (5) is provided with multiple groups of uniformly arranged second mounting holes. The top ends of the multiple groups of heat exchange tubes (4) are respectively inserted into the first mounting holes from the bottom end of the upper header (3). The top ends of the multiple groups of heat exchange tubes (4) are fixedly welded to the upper header (3). The bottom ends of the multiple groups of heat exchange tubes (4) are fixedly welded to the lower header (5). The multiple groups of heat exchange tubes (4) are internally connected to both the upper header (3) and the lower header (5). The multiple groups of heat exchange tubes (4) surround to form a cuboid cage shape. The front and rear ends of the cuboid cage shape are tapered from bottom to top. The left and right ends of the cuboid cage shape are flared from bottom to top. The bottom end of the upper flange (1) is fixedly welded to the top end of the upper header (3). The top end of the lower flange (2) is fixedly welded to the top end of the lower header (5); A middle flange (11) is arranged on the upper part of the multiple groups of heat exchange tubes (4). Multiple groups of fastening bolts (12) are arranged between the upper flange (1) and the middle flange (11).

2. The calcined coke hopper steam generator according to claim 1, wherein Vertical fin sheets (13) are arranged on the heat exchange tubes (4).

3. The calcined coke hopper steam generator according to claim 2, characterized in that, A water inlet pipe (14) is arranged at the right end of the lower header (5). The output end of the water inlet pipe (14) is internally connected to the lower header (5). A water vapor discharge pipe (15) is arranged at the left end of the upper header (3). The input end of the water vapor discharge pipe (15) is internally connected to the upper header (3).

4. The calcined coke hopper steam generator according to claim 3, characterized in that, A blowdown pipe (16) is arranged at the left part of the bottom end of the lower header (5). The input end of the blowdown pipe (16) is internally connected to the lower header (5).

5. The calcined coke hopper steam generator according to claim 4, wherein Multiple groups of uniformly distributed strengthening connection pieces (17) are arranged between the upper flange (1) and the middle flange (11).

6. The calcined coke hopper steam generator according to claim 5, wherein, Diaphragms (18) are arranged between the multiple groups of heat exchange tubes (4).

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