CN216764782U - Ceramic coil heat exchanger for coke oven ascending pipe - Google Patents
Ceramic coil heat exchanger for coke oven ascending pipe Download PDFInfo
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- CN216764782U CN216764782U CN202220319958.7U CN202220319958U CN216764782U CN 216764782 U CN216764782 U CN 216764782U CN 202220319958 U CN202220319958 U CN 202220319958U CN 216764782 U CN216764782 U CN 216764782U
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Abstract
The utility model relates to the technical field of riser raw gas waste heat recycling. The technical scheme of the utility model is as follows: an annular space is formed between the heat-insulating material protective layer (16) and the heat-conducting filling layer outer sealing layer (17), a plurality of supporting pieces are uniformly distributed in the annular space along the circumferential direction, and heat-insulating materials (7) are fully distributed in the annular space; the ceramic protective layer (5) is arranged on one side of the spiral coil (8) contacted with the high-temperature raw coke oven gas, and the spiral coil is arranged on the ceramic protective layer (5)(8) And a high-heat-conducting filler (4) is arranged between the spiral coil and the outer sealing layer of the heat-conducting filling layer, and is separated from the high-temperature raw gas. The utility model can resist SO in the raw coke oven gas2、H2S corrosion of corrosive gas and high-temperature burning loss. The supporting force of the pipe section body is enhanced by the supporting piece, the heat-insulating material protective layer is prevented from being influenced by high-temperature creep, and meanwhile, the heat-conducting filling outer sealing layer can be fixed to bear larger pressure.
Description
Technical Field
The utility model relates to a ceramic coil heat exchanger for a coke oven ascension pipe, in particular to a ceramic heat exchanger with T-shaped support, a spiral coil and a heat conduction function, and belongs to the technical field of raw coke oven gas waste heat recovery and utilization of the ascension pipe.
Background
In the prior art, an outer coil type heat exchanger is used for recovering waste heat of a coke oven gas riser, the inner wall of a jacket outside a coil is of a metal structure, and the metal structure is directly contacted with SO in raw coke oven gas2、H2S high-temperature corrosive gas. No matter the metal fin or the metal inner wall, the burning loss and the corrosion rate are high, and hidden troubles are left for long-term safe operation. The high heat conduction ceramic material of aluminium oxide is used extensively in the radiator, if be used for replacing heat exchanger inner wall and fin, just can solve the operation hidden danger, but ceramic material receives its characteristic influence, can not bear pressure, admittedly need design a neotype ceramic coil pipe heat exchanger, avoids it too much to receive external force to influence.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a ceramic coil heat exchanger for a coke oven ascension pipe, wherein a pipe section body is internally provided with a T-shaped support for increasing strength, a plurality of strands of spiral coils are arranged inside the pipe section body, the heat exchange effect is good, the inner wall of a jacket is replaced by a ceramic protective layer with a heat conduction function, the burning loss and corrosion of the inner wall of the jacket are avoided, and the problems in the background art are solved.
The technical scheme of the utility model is as follows:
a ceramic coil heat exchanger for a coke oven ascension pipe comprises a pipe section body, wherein the pipe section body comprises a heat insulation material protective layer, a heat conduction filling layer outer sealing layer and a ceramic protective layer which are arranged from outside to inside, an annular space is formed between the heat insulation material protective layer and the heat conduction filling layer outer sealing layer, a plurality of supporting pieces are uniformly arranged in the annular space along the circumferential direction and are used for supporting the heat insulation material protective layer and the heat conduction filling layer outer sealing layer, and the annular space is filled with a heat insulation material; the spiral coil is arranged in the jacket, the ceramic protective layer is arranged on one side of the spiral coil, which is contacted with the high-temperature raw coke oven gas, the ceramic protective layer separates the spiral coil from the high-temperature raw coke oven gas, and a high-heat-conductivity filler is arranged between the spiral coil and the outer sealing layer of the heat-conducting filling layer.
The ceramic protective layer is cylindrical and consists of a plurality of layers of annular ceramic protective layers which are sequentially arranged from top to bottom, and the annular ceramic protective layers are connected into a whole through a fixing rod.
The annular ceramic protective layers are formed by splicing a plurality of arc-shaped ceramic fin tiles along the circumferential direction, adjacent ceramic fin tiles are connected through longitudinal telescopic filling materials, and corresponding ceramic fin tiles between every two adjacent annular ceramic protective layers are connected through transverse telescopic filling materials.
The ceramic fin tile is composed of an arc-shaped ceramic inner wall and a plurality of ceramic fins, the ceramic fins are uniformly arranged on the ceramic inner wall along the radial direction, and the ceramic inner wall is provided with a plurality of reserved fixing holes which are longitudinally arranged; the corresponding reservation fixed orifices intercommunication forms the dead lever and places the hole between the adjacent pottery inner wall from top to bottom, and the dead lever setting is placed downtheholely at the dead lever.
The ceramic fins on the upper and lower adjacent ceramic fin tiles are vertically aligned and connected through the transverse telescopic filler.
The supporting piece is T-shaped iron, channel steel or I-shaped steel. For example, when the support member is made of T-shaped iron, the T-shaped iron is composed of a circumferential plate and a radial plate, the circumferential plate is arc-shaped and fixed on the inner wall of the heat-insulating material protective layer, the radial plate is vertically arranged in the middle of the transverse plate, and the end part of the radial plate is fixed with the outer sealing layer of the heat-conducting filling layer. The T-shaped iron is used for strengthening and supporting main stress parts, and the circumferential plate prevents the heat-insulating material protective layer from being influenced by high-temperature creep deformation. The radial plate is connected with the outer sealing layer of the heat-conducting filling layer and is used for fixing the outer sealing layer of the heat-conducting filling layer.
The spiral coil is a plurality of parallel spiral coils, such as a parallel double spiral coil or a triple spiral coil.
An outlet flange and an inlet flange are respectively arranged at two ends of the pipe section body; the multi-strand spiral coil is communicated with the lower water inlet pipe through the water diversion device, and the multi-strand spiral coil is communicated with the steam outlet pipe through the steam drum device.
The upper end and the lower end of the pipe section body are respectively provided with an outlet flange and an inlet flange; the spiral coil is formed by connecting a plurality of strands of coil pipes in parallel, the water inlet end of each strand of coil pipe is communicated with the lower water inlet pipe through the water diversion device, and the air outlet end of each strand of coil pipe is communicated with the air outlet pipe through the steam pocket device. The water diversion device is used for shunting water entering from the water inlet pipe at the lower part, the shunted water rises to the heat taking section through the corresponding strand coil and is gradually vaporized, and steam in the strand coil is collected into a whole through the steam drum device and then enters the steam outlet pipe.
The heat-insulating material protective layer and the heat-conducting filling layer are both made of metal plates, such as stainless steel plates.
The high thermal conductivity filler is a technique known in the art, such as: the inorganic matter with high heat conductivity is prepared with graphite powder, magnesia powder (or other metal powder), high temperature metal casting glue, etc.
The transverse telescopic filler and the longitudinal telescopic filler are both high-temperature-resistant glue and are sold on the market.
The metal heat-extracting inner wall of the jacket of the utility model is replaced by a ceramic protective layer, which is a technique known in the art, such as: the method comprises the steps of molding by using an alumina high-thermal-conductivity ceramic material, grouting, glazing and firing.
The structure of the ceramic protective layer after firing can be as follows:
firstly, the ceramic protective layer is an integral cylindrical ceramic cylinder, and the inner wall of the ceramic cylinder can be provided with a plurality of uniformly arranged ceramic fins arranged radially;
the ceramic protective layer is composed of a plurality of ceramic rings which are integrally annular, the ceramic rings are sequentially arranged from top to bottom and are connected through a longitudinal telescopic filler, a plurality of ceramic fins which are uniformly arranged and radially arranged can also be arranged on the ceramic rings, the number of the ceramic fins on each ceramic ring is the same, the ceramic fins on two adjacent ceramic rings are mutually corresponding up and down and are connected through the longitudinal telescopic filler, a plurality of longitudinally arranged reserved fixing holes are arranged on the ceramic rings, the reserved fixing holes on the adjacent ceramic rings are mutually corresponding up and down and are mutually communicated to form a fixing rod placing hole, a fixing rod penetrates through the fixing rod placing hole to connect the ceramic rings into a whole, and the whole body forms a cylindrical structure;
the ceramic protective layer is composed of a plurality of ceramic fin tiles, each ceramic fin tile is composed of an arc-shaped ceramic inner wall and a plurality of ceramic fins, the ceramic fins are uniformly arranged on the ceramic inner wall along the radial direction, and a plurality of reserved fixing holes which are longitudinally arranged are formed in the ceramic inner wall. The ceramic finned tiles are connected with each other through transverse telescopic fillers along the circumferential direction to form ceramic rings, the ceramic rings are sequentially arranged from top to bottom and are connected through longitudinal telescopic fillers, and ceramic fins on adjacent ceramic rings are aligned up and down and are also connected through longitudinal telescopic fillers. A plurality of reserved fixing holes between two adjacent ceramic fin tiles are respectively corresponding to each other from top to bottom and communicated with each other to form a fixing rod placing hole, the fixing rods penetrate through the fixing rod placing holes to connect the ceramic rings into a whole, and the whole body is of a cylindrical structure.
The utility model has the following positive effects:
(1) the inner wall of the jacket is replaced by a ceramic protective layer with a heat conduction function, and the ceramic protective layer is made of alumina heat conduction ceramic material and can resist SO in raw gas2、H2S corrosion of corrosive gas and high-temperature burning loss. The supporting force of the pipe section body is enhanced by the supporting piece, the heat-insulating material protective layer is prevented from being influenced by high-temperature creep deformation, and meanwhile, the heat-conducting filling outer sealing layer can be fixed to bear larger pressure;
(2) by adopting a multi-strand spiral coil pipe structure, the diameter of the coil pipe can be properly reduced, the contact area between the coil pipe and the ceramic protective layer is increased, the distance between the center of the coil pipe and a heat source on the inner wall surface is reduced, and the total heat exchange coefficient is increased. Gaps and peripheries of the multiple strands of spiral coils are filled with high-heat-conductivity fillers, the expansion coefficient of the high-heat-conductivity fillers is close to that of the materials of the multiple strands of spiral coils, a temperature field formed by the surrounding spaces of the multiple strands of spiral coils is basically constant, and no gap exists between the high-heat-conductivity fillers and the temperature field.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic view of a ceramic fin tile according to the present invention;
FIG. 4 is a schematic view of the structure of part I of FIG. 1;
in the figure: the heat-conducting and heat-insulating boiler comprises an outlet flange 1, a steam outlet pipe 2, a steam drum device 3, a high-heat-conducting filler 4, a ceramic protective layer 5, a transverse telescopic filler 6, a heat-insulating material 7, a spiral coil 8, a water inlet pipe 9, an inlet flange 10, a water distribution device 11, a raw gas inlet 12, a raw gas outlet 13, a ceramic fin tile 14, a ceramic inner wall 141, a ceramic fin 142, a reserved fixing hole 143, T-shaped iron 15, a circumferential plate 151, a radial plate 152, a heat-insulating material protective layer 16, a heat-conducting and heat-conducting filling outer sealing layer 17 and a fixing rod 18.
Detailed Description
The utility model is further described with reference to the following figures and examples:
in the present embodiment, with reference to fig. 1-4: a ceramic coil heat exchanger for a coke oven ascension pipe comprises a pipe section body, wherein the pipe section body comprises a heat insulation material protective layer 16, a heat conduction filling layer outer sealing layer 17 and a ceramic protective layer 5 which are arranged from outside to inside, an annular space is formed between the heat insulation material protective layer 16 and the heat conduction filling layer outer sealing layer 17, a plurality of supporting pieces are uniformly arranged in the annular space along the circumferential direction and are used for supporting the heat insulation material protective layer 16 and the heat conduction filling layer outer sealing layer 17, and heat insulation materials 7 are fully distributed in the annular space; the outer sealing layer 17 of the heat-conducting filling layer and the ceramic protective layer 5 form a jacket, the spiral coil 8 is arranged in the jacket, the ceramic protective layer 5 is arranged on one side of the spiral coil 8, which is contacted with high-temperature raw gas, the spiral coil 8 is separated from the high-temperature raw gas by the ceramic protective layer 5, and the high-heat-conducting filler 4 is arranged between the spiral coil 8 and the outer sealing layer 17 of the heat-conducting filling layer.
The ceramic protective layer 5 is cylindrical and is composed of a plurality of ceramic rings which are sequentially arranged from top to bottom, and the ceramic rings are connected into a whole through a fixing rod 18.
The ceramic rings are formed by splicing a plurality of arc-shaped ceramic fin tiles 14 along the circumferential direction, the adjacent ceramic fin tiles 14 are connected through longitudinal telescopic filling materials, and the corresponding ceramic fin tiles 14 between the upper and lower adjacent ceramic rings are connected through transverse telescopic filling materials 6.
The ceramic fin tile 14 is composed of an arc-shaped ceramic inner wall 141 and a plurality of ceramic fins 142, the ceramic fins 142 are uniformly arranged on the ceramic inner wall 141 along the radial direction, and the ceramic inner wall 141 is provided with a plurality of reserved fixing holes 143 arranged longitudinally; the corresponding reserved fixing holes 143 between the upper and lower adjacent ceramic inner walls 141 are communicated to form fixing rod placing holes, and the fixing rods 18 are arranged in the fixing rod placing holes.
The ceramic fins 142 on the upper and lower adjacent ceramic fin tiles 14 are aligned up and down and connected by the transverse telescopic filler 6.
According to the stress calculation, the supporting pieces can adopt various structures such as T-shaped iron, channel steel or I-shaped steel, the use requirements can be met, and the number of the supporting pieces can be selected according to the perimeter of the ascending pipe (the heat-insulating material protection layer). Referring to fig. 2, in this embodiment, T-shaped iron is used as a supporting member, the T-shaped iron 15 is composed of a circumferential plate 151 and a radial plate 152, the circumferential plate 151 is arc-shaped and fixed on the inner wall of the thermal insulation material protective layer 16, the radial plate 152 is vertically arranged in the middle of the transverse plate, and the end part of the radial plate is fixed with the outer sealing layer 17 of the thermal conductive filling layer.
Also the spiral coil 8 can be combined in various ways: such as a parallel double spiral coil or a triple spiral coil, etc., and in conjunction with fig. 1, a double spiral coil is used in this embodiment. The upper end and the lower end of the pipe section body are respectively provided with an outlet flange 1 and an inlet flange 10; the water inlet end of the double-spiral coil is communicated with the lower water inlet pipe through the water distribution device, and the air outlet end of the double-spiral coil is communicated with the steam outlet pipe through the steam drum device. The water diversion device is used for shunting water entering from the water inlet pipe at the lower part, the shunted water rises to the heat taking section through the corresponding strand disc to be gradually vaporized, and steam in the double-spiral coil pipe is collected into a whole through the steam drum device and then enters the steam outlet pipe.
The heat-insulating material protective layer 16 and the heat-conducting filling layer outer sealing layer 17 are both made of stainless steel guard plates.
The using process of the utility model is as follows:
as shown in fig. 1: the heat exchanger is supplied with water by a water inlet pipe 9, and enters the double-spiral coil pipe after being divided by a water dividing device 11. High temperature raw coke oven gas above 700 ℃ enters from raw coke oven gas entry 12, through import flange 10, get into inside the pipeline section body, high temperature raw coke oven gas passes through heat radiation and thermal convection with comprehensive heat transfer mode, give ceramic fin and ceramic inner wall with heat transfer, through ceramic inner wall 141, give high heat conduction filler 4 in double helix coil area with heat transfer, high heat conduction filler 4 is to double helix coil heat transfer, after double helix coil fully absorbs heat, the steam-water mixture is joined by steam pocket device 3, through the play steam pipe 2 outflow heat exchanger, and then take the heat out and accomplish and get the heat. After being heated by the ceramic inner wall 141 and the ceramic fins 142, the raw gas flows through the outlet flange 1 from the raw gas outlet 13 and enters the bridge pipe section.
The ceramic protective layer 5 is resistant to high temperature corrosion, SO SO2 and H2S high temperature corrosive gases in the raw coke oven gas cannot damage the raw coke oven gas, and the life cycle of the heat exchanger is prolonged. The heat conduction function of the ceramic protective layer can conduct heat to the high-heat-conduction filler 4, so that the cylindrical surface of the coil pipe is uniformly heated, and the temperature change has certain hysteresis. And the temperature change of the ceramic protective layer has certain hysteresis, so that the phenomena of large local change of heat exchange with raw gas and easy coking are avoided. The multi-strand spiral coil is selected, the pipe diameter size is reduced, the size is the same, the outer surface area of the coil is larger, and heat exchange with the high-heat-conduction filler 4 is facilitated. The supporting piece meets the requirement of stress, the whole weight of the device is reduced, the vacant position is filled with the heat insulation material 7, and the temperature of the external space is reduced while the heat loss is reduced.
Claims (10)
1. A ceramic coil heat exchanger for a coke oven ascending pipe is characterized in that: the pipe comprises a pipe section body, wherein the pipe section body comprises a heat insulation material protective layer (16), a heat conduction filling layer outer sealing layer (17) and a ceramic protective layer (5) which are arranged from outside to inside, an annular space is formed between the heat insulation material protective layer (16) and the heat conduction filling layer outer sealing layer (17), a plurality of supporting pieces are uniformly arranged in the annular space along the circumferential direction and are used for supporting the heat insulation material protective layer (16) and the heat conduction filling layer outer sealing layer (17), and heat insulation materials (7) are fully distributed in the annular space; the outer sealing layer (17) of the heat-conducting filling layer and the ceramic protective layer (5) form a jacket, the spiral coil (8) is arranged in the jacket, the ceramic protective layer (5) is arranged on one side of the spiral coil (8) which is contacted with high-temperature raw coke oven gas, the ceramic protective layer (5) separates the spiral coil (8) from the high-temperature raw coke oven gas, and high-heat-conducting filler (4) is arranged between the spiral coil (8) and the outer sealing layer (17) of the heat-conducting filling layer.
2. The ceramic coil heat exchanger for the coke oven ascension pipe of claim 1, wherein: the ceramic protective layer (5) is cylindrical and is composed of a plurality of ceramic rings which are sequentially arranged from top to bottom, and the ceramic rings are connected into a whole through a fixing rod (18).
3. The ceramic coil heat exchanger for the coke oven ascension pipe of claim 2, wherein: the ceramic rings are formed by splicing a plurality of arc-shaped ceramic fin tiles (14) along the circumferential direction, the adjacent ceramic fin tiles (14) are connected through longitudinal telescopic filling materials, and the corresponding ceramic fin tiles (14) between the upper and lower adjacent ceramic rings are connected through transverse telescopic filling materials (6).
4. The ceramic coil heat exchanger for the coke oven ascension pipe according to claim 3, wherein: the ceramic fin tile (14) consists of an arc-shaped ceramic inner wall (141) and a plurality of ceramic fins (142), the ceramic fins (142) are uniformly arranged on the ceramic inner wall (141) along the radial direction, and the ceramic inner wall (141) is provided with a plurality of reserved fixing holes (143) which are longitudinally arranged; the reserved fixing holes (143) corresponding to the upper and lower adjacent ceramic inner walls (141) are communicated to form fixing rod placing holes, and the fixing rods (18) are arranged in the fixing rod placing holes.
5. The ceramic coil heat exchanger for the coke oven ascension pipe of claim 4, wherein: the ceramic fins (142) on the upper and lower adjacent ceramic fin tiles (14) are vertically aligned and connected through the transverse telescopic filling material (6).
6. The ceramic coil heat exchanger for the coke oven ascension pipe according to claim 1 or 2, wherein: the supporting piece is T-shaped iron (15), channel steel or I-shaped steel.
7. The ceramic coil heat exchanger for the coke oven ascension pipe of claim 6, wherein: the T-shaped iron (15) is composed of a circumferential plate (151) and a radial plate (152), the circumferential plate (151) is arc-shaped and fixed on the inner wall of the heat-insulating material protective layer (16), the radial plate (152) is vertically arranged in the middle of the transverse plate, and the end part of the radial plate is fixed with an outer sealing layer (17) of the heat-conducting filling layer.
8. The ceramic coil heat exchanger for the coke oven ascension pipe according to claim 1 or 2, wherein: the spiral coil (8) is a plurality of strands of spiral coils connected in parallel.
9. The ceramic coil heat exchanger for the coke oven ascension pipe according to claim 8, wherein: an outlet flange (1) and an inlet flange (10) are respectively arranged at two ends of the pipe section body; the multi-strand spiral coil is communicated with the water inlet pipe (9) through the water diversion device (11), and the multi-strand spiral coil is communicated with the steam outlet pipe (2) through the steam drum device (3).
10. The ceramic coil heat exchanger for the coke oven ascension pipe according to claim 1 or 2, wherein: the heat-insulating material protective layer (16) is made of a stainless steel protective plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220319958.7U CN216764782U (en) | 2022-02-17 | 2022-02-17 | Ceramic coil heat exchanger for coke oven ascending pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220319958.7U CN216764782U (en) | 2022-02-17 | 2022-02-17 | Ceramic coil heat exchanger for coke oven ascending pipe |
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| Publication Number | Publication Date |
|---|---|
| CN216764782U true CN216764782U (en) | 2022-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220319958.7U Active CN216764782U (en) | 2022-02-17 | 2022-02-17 | Ceramic coil heat exchanger for coke oven ascending pipe |
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| Country | Link |
|---|---|
| CN (1) | CN216764782U (en) |
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- 2022-02-17 CN CN202220319958.7U patent/CN216764782U/en active Active
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