CN111504092A - Graphite tube-array heat exchanger and assembling method thereof - Google Patents
Graphite tube-array heat exchanger and assembling method thereof Download PDFInfo
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- CN111504092A CN111504092A CN202010425092.3A CN202010425092A CN111504092A CN 111504092 A CN111504092 A CN 111504092A CN 202010425092 A CN202010425092 A CN 202010425092A CN 111504092 A CN111504092 A CN 111504092A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0229—Double end plates; Single end plates with hollow spaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/10—Arrangements for sealing elements into header boxes or end plates by dismountable joints by screw-type connections, e.g. gland
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/12—Arrangements for sealing elements into header boxes or end plates by dismountable joints by flange-type connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a graphite tube-in-tube heat exchanger and an assembly method thereof.A lower cement anti-overflow cylinder and an upper cement anti-overflow cylinder are respectively and fixedly connected to the upper end of a floating tube plate and the lower end of a fixed tube plate, a lower auxiliary tube plate and an upper auxiliary tube plate are respectively arranged in the lower cement anti-overflow cylinder and the upper cement anti-overflow cylinder, flow passages of the lower auxiliary tube plate and the upper auxiliary tube plate are respectively in one-to-one coaxial correspondence with the flow passages on the floating tube plate and the fixed tube plate, and the lower auxiliary tube plate and the floating tube plate as well as the upper auxiliary tube plate and the fixed tube plate are respectively connected through a lower detachable. The heat exchanger has the advantages of difficult cement overflow, smooth floating of the floating tube plate, improvement of stress condition, reduction of load borne by the bonding part of the tube plate and the graphite heat exchange tube, high one-time assembly qualification rate, long service life, small risk of breakage and leakage of the graphite heat exchange tube, high assembly efficiency, simple and convenient assembly operation, reduction of production cost, difficult looseness of the baffle plate, no abnormal sound and high heat exchange efficiency.
Description
Technical Field
The invention relates to a graphite heat exchanger, in particular to a graphite tube heat exchanger and an assembling method thereof.
Background
A graphite floating head type tube heat exchanger is a common heat exchange device in chemical production and is widely applied to a dividing wall type heat exchange operation unit in a chemical anti-corrosion environment.
The structure of the traditional graphite floating head type tubular heat exchanger: the graphite heat exchange tube penetrates through the baffle plate and is arranged in the cylinder, the upper end of the graphite heat exchange tube is hermetically and fixedly connected with the fixed tube plate, and the lower end of the graphite heat exchange tube is hermetically and fixedly connected with the floating tube plate.
According to the traditional assembly method of the graphite floating head type tube-tube heat exchanger, a graphite tube bundle and a baffle plate are assembled and bonded outside a cylinder, and then the graphite tube bundle and the baffle plate are integrally penetrated into the cylinder, and the graphite tube bundle and parts are easily damaged in the penetrating and assembling process due to the fact that graphite is a brittle material, the tube plugging rate is high, and the overall service life of equipment is influenced by hidden damage defects.
And when the floating tube plate and the fixed tube plate of the graphite floating head type tube heat exchanger are assembled and bonded with the graphite heat exchange tube, the daub is easy to overflow excessively, so that the floating tube plate and the tube body are clamped, the floating is not smooth, the heat exchange tube is broken or leaked frequently, the service life is short, the maintenance and disassembly are difficult, and the daub filling compactness at the connecting joint of the graphite heat exchange tube and the flow channel of the floating tube plate and the fixed tube plate is low, and the risk of leakage also exists. The flanges on the fixed tube plate and the cylinder body can be blocked and adversely affected when being compressed and sealed, sealing failure often occurs, and the tube plate between the fixed tube plate and the cylinder body is broken due to secondary stress generated by expansion with heat and contraction with cold.
Disclosure of Invention
The invention aims to provide a graphite tube-in-tube heat exchanger and an assembling method thereof. The heat exchanger has the characteristics that the daub is not easy to overflow, the floating tube plate floats smoothly, the stress condition is improved, the load borne by the bonding part of the tube plate and the graphite heat exchange tube is reduced, the one-time assembly qualification rate is high, the service life is long, the graphite heat exchange tube is low in risk of breakage and leakage, the assembly efficiency is high, the assembly operation is simple and convenient, and the production cost is reduced; in addition, the baffle plate is not easy to loosen, has no abnormal sound and has high heat exchange efficiency.
The technical scheme of the invention is as follows: a graphite tube heat exchanger comprises a vertically through cylinder, wherein the lower end and the upper end of the cylinder are respectively provided with a cylinder flange, a support lug is fixedly connected outside the cylinder, the lower end and the upper end of the cylinder are respectively provided with a cooling water inlet and a cooling water outlet, and the upper end of the cylinder is also provided with a vent; the end parts of the lower end and the upper end of the cylinder body are respectively provided with a floating tube plate and a fixed tube plate, the floating tube plate is connected in the lower end of the cylinder body in a sliding and sealing manner, the fixed tube plate is fixedly connected at the end part of the upper end of the cylinder body, and a plurality of graphite heat exchange tubes are connected between the floating tube plate and the fixed tube plate;
The lower end of the floating tube plate is connected with a lower anti-corrosion end socket, the lower anti-corrosion end socket is provided with a material inlet, the lower anti-corrosion end socket is fixedly connected with the floating tube plate in a sealing way through a split ring, a flange, a bolt spring and the like, the upper end of the fixed tube plate is connected with an upper anti-corrosion end socket, the upper end of the floating tube plate and the lower end of the fixed tube plate are fixedly connected with a lower cement anti-overflow cylinder and an upper cement anti-overflow cylinder respectively, a lower auxiliary tube plate and an upper auxiliary tube plate are arranged in the lower cement anti-overflow cylinder and the upper cement anti-overflow cylinder respectively, lower process holes communicated with each other are formed in the lower auxiliary tube plate and the floating tube plate, upper process holes communicated with each other are formed in the upper auxiliary tube plate and the fixed tube plate, lower detachable adjusting screws and upper detachable adjusting screws are arranged in the lower process holes and the upper process holes respectively, and flow channels of the lower auxiliary tube plate and the upper auxiliary tube plate are in one-to-one coaxial correspondence with flow channels in the floating tube plate and the fixed tube plate respectively.
In the graphite tubular heat exchanger, the lower end of the lower anti-corrosion end socket and the upper end of the upper anti-corrosion end socket are respectively provided with the lower metal cover plate and the upper metal cover plate.
In the graphite tubular heat exchanger, a spring and a nut are arranged at the lower end of the screw for fixing the metal lower cover plate.
In the graphite tube nest heat exchanger, the cooling water inlet is connected to the semi-annular flow guide water sleeve outside the cylinder, and a plurality of water inlet distribution holes are formed in the cylinder wall of the cylinder in the area, which is staggered with the cooling water inlet, in the semi-annular flow guide water sleeve.
In the graphite tube heat exchanger, a plurality of baffle plates are longitudinally arranged in the cylinder body, and the baffle plates are sleeved on the graphite heat exchange tubes.
In the graphite tubular heat exchanger, the baffle plates are arranged in a staggered manner in the longitudinal direction.
According to the graphite tubular heat exchanger, the baffle plate is installed through the positioning stop blocks fixed on the distance rods, the positioning stop blocks are bonded on the distance rods and fixed through the positioning pins, the graphite tubular heat exchanger is firmer and more reliable, and the distance rods and the positioning stop blocks are made of graphite materials.
In the graphite tube-in-tube heat exchanger, the longitudinal section of the connecting section of the graphite heat exchange tube, the floating tube plate and the fixed tube plate is tapered.
The installation method of the graphite tubular heat exchanger comprises the following steps:
1) Firstly, a baffle plate, a lower auxiliary tube plate and an upper auxiliary tube plate are arranged in a cylinder body, and then graphite heat exchange tubes sequentially penetrate through flow channels on the lower auxiliary tube plate, the baffle plate and the upper auxiliary tube plate one by one;
2) Respectively bonding and fixing the fixed tube plate and the upper cement overflow preventing cylinder and the floating tube plate and the lower cement overflow preventing cylinder;
3) Daubing daub on two ends of the inserted graphite heat exchange tube, and then respectively installing the fixed tube plate and the floating tube plate at two ends of the graphite heat exchange tube so that two ends of the graphite heat exchange tube are respectively inserted into the flow channels of the floating tube plate and the fixed tube plate;
4) Sequentially penetrating a lower detachable adjusting screw rod and an upper detachable adjusting screw rod into a lower technical hole and an upper technical hole of the corresponding side, screwing nuts at two ends, extruding redundant daub between a lower auxiliary tube plate and a floating tube plate and between an upper auxiliary tube plate and a fixed tube plate through tensioning adjustment of the lower detachable adjusting screw rod and the upper detachable adjusting screw rod, matching with a lower daub anti-overflow cylinder and an upper daub anti-overflow cylinder of the corresponding side to complete the function similar to an injector, and extruding the redundant daub into a gap to enable the daub in the bonding gap to be more compact;
5) And (4) installing the rest parts according to a conventional method.
The invention has the advantages of
1. The invention realizes the effective control of the daub according to the preset guide by respectively installing the daub anti-overflow cylinders on the upper side of the floating tube plate and the lower side of the fixed tube plate;
2. The daub in the assembling process cannot overflow to the position between the floating tube plate and the cylinder body, so that the problem of floating tube plate clamping and blocking caused by the daub overflow is avoided, the floating smoothness of the floating tube plate is ensured, the qualification rate of one-time assembly is improved, the service life of equipment is prolonged, and the risks of breakage and leakage of the graphite heat exchange tube are reduced;
3. The daub in the assembling process cannot overflow to the position between the fixed tube plate and the cylinder body, so that the problem of clamping and plugging the fixed tube plate due to the overflow of the daub is avoided, the fixed tube plate and the flange on the cylinder body are prevented from being blocked and adversely affected by other factors when being tightly pressed and sealed, and the tube plate is prevented from being cracked due to secondary stress generated by expansion with heat and contraction with cold between the fixed tube plate and the cylinder body;
4. According to the invention, the auxiliary tube plate is arranged, the detachable adjusting screw rod is adopted to fix the auxiliary tube plate, the floating tube plate and the fixed tube plate, and redundant daub at the joint of the graphite heat exchange tube, the floating tube plate and the fixed tube plate is extruded under the matching of the auxiliary tube plate, the daub anti-overflow cylinder and the detachable adjusting screw rod to form a function similar to an injector, so that the daub is more compactly injected into a bonding seam, and bonding air holes are eliminated. The connection sealing performance and firmness among the graphite heat exchange tube, the floating tube plate and the fixed tube plate are ensured, the risk of leakage is further reduced, the impermeability and the bonding strength are improved, the pressure resistance is improved by 1.2 times, and the bonding strength between the tube plate and the graphite heat exchange tube is improved by 1.3 times;
5. The auxiliary tube plate is pulled and leaned through the detachable adjusting screw rod, so that strong driving power is provided for extruding, injecting and compacting the bonding daub, the bonding daub is guaranteed to be compacted and compacted, and meanwhile, after the assembly is completed, the bolt is detached and the process hole is blocked, so that the operation is simple and convenient, and the practical effect is good;
6. The invention saves the working procedure of manually cleaning the overflowed excess daub, improves the assembly efficiency and averagely saves 2 workers/day; due to the improvement of the anti-permeability performance and the bonding strength, the pipe blocking rate is reduced by 3 percent, and the overall heat exchange efficiency of the equipment is improved;
7. By arranging the semi-annular diversion water jacket, the buffering of the cooling water at the service side is effectively controlled, the impact vibration to the graphite heat exchange tube is reduced, the water flow direction is effectively controlled, the water flow distribution is optimized, the turbulence efficiency is improved, and the total heat exchange efficiency is favorably improved; by adopting the structural design, when the orientation of the pipe orifice of the system design and the process orientation of the cooling water inlet of the equipment are not unified, the structure can be adopted to play a role in converting the direction;
8. The invention adopts the combined structure of the distance rod, the positioning stop block and the positioning pin, and the split charging and positioning can avoid the problems of baffle plate looseness, abnormal sound and the like caused by processing errors;
9. According to the invention, by optimizing the structure of the connecting end of the tube plate and the graphite heat exchange tube and adopting the structural design of combining the cone and the straight tube, the filling degree of the initial daub is favorably improved, a reasonable channel and angle are provided for secondary pressurized injection of the auxiliary tube plate, the bonding effect is improved, the strength is higher, the leakage risk is smaller, and the overall bonding effect is far better than that of the traditional assembly bonding mode.
10. According to the invention, the protection tool combining the spring, the bolt and the nut is arranged at the end of the floating tube plate, so that the graphite piece is fully protected from being damaged in the processes of hoisting, transportation and hydrostatic test, and the tool is removed after the equipment is installed in place, so that the normal use of the equipment is not influenced;
11. The graphite tube nest heat exchanger has the advantages of compact structure, good stress condition, simple assembly operation and convenient installation and maintenance;
12. the method avoids the problems that the service life of the whole equipment is influenced due to the damage and hidden damage of the graphite heat exchange tube bundle and parts when the graphite tube bundle is integrally arranged in the cylinder body in a penetrating way, reduces the tube plugging rate and greatly improves the service life of the equipment;
In conclusion, the invention ensures the connection sealing performance and firmness among the graphite heat exchange tube, the floating tube plate and the fixed tube plate, further reduces the risk of leakage, improves the impermeability and bonding strength, saves the process of manually cleaning overflowing redundant daub, and improves the assembly efficiency; meanwhile, the effective control of the daub according to the preset guide is realized, the daub in the assembling process cannot overflow to a position between the floating tube plate and the cylinder body, the problem of floating tube plate blocking caused by the overflow of the daub is avoided, the floating smoothness of the floating tube plate is ensured, the qualification rate of one-time assembling is improved, the service life of equipment is prolonged, and the risks of breakage and leakage of the graphite heat exchange tube are reduced; the daub in the assembling process cannot overflow to a position between the fixed tube plate and the cylinder body, so that the problem of clamping and plugging the fixed tube plate due to the overflow of the daub is avoided, and the fixed tube plate and the upper flange of the cylinder body are prevented from being blocked and adversely affected when being pressed and sealed; the tube plate fracture caused by secondary stress generated by expansion with heat and contraction with cold between the fixed tube plate and the cylinder body is prevented.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the structure at the floating tube plate;
3 fig. 3 3 3 is 3 a 3 view 3 a 3- 3 a 3 of 3 fig. 3 1 3. 3
Description of reference numerals: 1-cylinder, 2-cooling water inlet, 3-cooling water outlet, 4-floating tube plate, 5-fixed tube plate, 6-graphite heat exchange tube, 7-lower anti-corrosion seal head, 8-material inlet, 9-upper anti-corrosion seal head, 10-material outlet, 11-lower cement anti-overflow cylinder, 12-lower auxiliary tube plate, 13-lower detachable adjusting screw, 14-upper cement anti-overflow cylinder, 15-upper auxiliary tube plate, 16-upper detachable adjusting screw, 17-vent, 18-semi-annular guide water jacket, 19-baffle plate, 20-positioning baffle, 21-metal lower cover plate, 22-metal upper cover plate, 23-spring and nut, 24-water inlet distribution hole, 25-positioning pin, 26-distance rod, 27-lower process hole, 28-forming a fabrication hole.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Examples of the invention
A graphite tube heat exchanger with the model number of GHA1300-420 is provided with a cylinder 1 which is made of metal and is penetrated up and down, cylinder flanges are arranged at the upper end and the lower end of the cylinder 1, a cooling water inlet 2 and a cooling water outlet 3 are respectively arranged at the lower end and the upper end of the cylinder 1, a vent 17 is further arranged at the upper end of the cylinder 1, a floating tube plate 4 and a fixed tube plate 5 which are made of graphite materials are respectively arranged at the lower end of the cylinder 1, the floating tube plate 4 is connected inside the lower end of the cylinder 1 in a sliding and sealing manner through an O-shaped ring, the fixed tube plate 5 is fixedly connected at the upper end of the cylinder 1, a plurality of graphite heat exchange tubes 6 are connected between the floating tube plate 4 and the fixed tube plate 5, a lower anti-corrosion seal head 7 which is made of graphite materials is connected at the lower end of the floating tube plate 4, a material inlet 8 is arranged at the lower anti-corrosion seal head 9 which is connected with an upper anti-corrosion seal head 9 which is made of graphite materials, a material outlet 10 is arranged at the upper seal head 9, a lower end of the floating tube plate 4 and a lower seal head 5, a lower seal head 12 which is connected with a lower seal tube plate 11 and a lower seal head 14 which are arranged in a lower seal tube plate 5, a lower seal head 12 which is arranged in a lower seal process, a lower seal head 15, a lower seal tube plate 4 which is arranged on the upper seal head 15, the upper seal process, the upper seal head 12 which is arranged on the upper seal head 12 which is arranged, the upper seal head 15, the upper seal head 12 and a lower seal head 15 which is arranged, the lower seal head 15, the upper seal head 12 which is arranged, the lower seal head 15 which is arranged on the lower seal head 15, the lower seal head 15 which is arranged, the upper seal head of the lower seal head of the upper seal head of the lower seal head of the floating tube plate 4, the upper seal process, the upper seal head of the lower seal head of the floating tube plate 4, the lower seal head of the.
The lower end of the lower anticorrosion end socket 7 and the upper end of the upper anticorrosion end socket 9 are respectively provided with a lower metal cover plate 21 and an upper metal cover plate 22, and the lower metal cover plate 21 and the upper metal cover plate 22 are respectively used for fixing the lower anticorrosion end socket 7 and the upper anticorrosion end socket 9.
And a spring and nut 23 assembly is arranged at the lower end of the screw for fixing the metal lower cover plate 21 and is used for protecting the graphite piece in the hoisting and hydraulic test processes, and the graphite piece needs to be detached after being installed in place so as to avoid influencing the free floating of the floating head.
The cooling water inlet 2 is connected to the semi-annular diversion water jacket 18 on the outer side of the cylinder body 1, the water inlet distribution holes 24 are formed in the cylinder wall of the cylinder body 1 in the area, staggered with the cooling water inlet 2, of the semi-annular diversion water jacket 18, when cooling water flows in from the cooling water inlet 2 at a high speed, the cooling water flows into the cylinder body 1 from the water inlet distribution holes 24 on the side face under the buffering effect of the semi-annular diversion water jacket 18, and due to the structural design, when the position of a pipe orifice of the system design and the process position of the equipment cooling water inlet are not uniform, the structure can be adopted to play a role in direction conversion.
A plurality of baffle plates 19 are longitudinally arranged in the cylinder body 1, and the baffle plates 19 are sleeved on the graphite heat exchange tube 6 and used for fixing the graphite heat exchange tube 6 and changing the flow direction of cooling water baffling, so that the heat transfer efficiency is improved.
The baffle plates 19 are arranged in a staggered mode in the longitudinal direction, so that the flow passage of cooling water is prolonged, the flow speed is improved, and the heat transfer efficiency is improved.
The baffle plate 19 is installed through a positioning stop block 20 fixed on a distance rod 26, the positioning stop block 20 is bonded on the distance rod 26 and is assisted and fixed through a positioning pin 25, the fixing is firmer and more reliable, the distance rod is made of graphite, and the positioning stop block is made of graphite.
The longitudinal sections of the connecting sections of the graphite heat exchange tubes 6, the floating tube plate 4 and the fixed tube plate 5 adopt a structural design of combining a straight cylinder and a cone, so that the filling degree of initial cement is improved, reasonable channels and angles are provided for secondary pressurized injection of the auxiliary tube plate, the bonding effect is improved, the strength is higher, the leakage risk is smaller, and the overall bonding effect is far better than that of the traditional assembly bonding mode; combining a straight cylinder and a cone: the height of the straight cylinder is generally 10mm, the height of the cone is 60mm, the taper is 8 degrees, and the bonding seam is 0.5 mm.
The invention also provides a process method for assembling and bonding the cylinder, which comprises the steps of firstly fixing the baffle plate 19, the lower auxiliary tube plate 12 and the upper auxiliary tube plate 15, wherein the baffle plate 19 is fixed through the distance rod 26 and the positioning stop block 20; then the graphite heat exchange tubes 6 are arranged one by one; finally, respectively smearing adhesive cement in the end part of the graphite heat exchange tube 6, the hole of the floating tube plate 4 and the hole of the fixed tube plate 5; then the fixed tube plate 5 and the upper cement-coated anti-overflow cylinder 15 are respectively bonded and fixed outside the cylinder body 1; the floating tube plate 4 is fixedly bonded with the lower cement overflow-preventing cylinder 11. Then, correspondingly folding the floating tube plate 4 and the fixed tube plate 5 with the graphite heat exchange tube 6 in the cylinder 1 by the positioning assistance of the auxiliary tube plate, and bonding the two into an integral tube bundle; finally, a detachable adjusting screw is arranged and is pulled against the auxiliary tube plate; redundant cement at the joint of the graphite heat exchange tube 6, the floating tube plate 4 and the fixed tube plate 5 forms a function similar to an injector under the matched extrusion of the auxiliary tube plate, the cement anti-overflow cylinder and the detachable adjusting screw, the cement is more compactly injected into the bonding seam, and bonding air holes are eliminated; the connection sealing performance and firmness among the graphite heat exchange tube, the floating tube plate and the fixed tube plate are ensured, the risk of leakage is further reduced, the impermeability and the bonding strength are improved, the process of manually cleaning overflowing redundant daub is omitted, and the assembly efficiency is improved; meanwhile, the effective control of the daub according to the preset guide is realized, the daub in the assembling process cannot overflow to a position between the floating tube plate and the cylinder body, the problem of floating tube plate blocking caused by the overflow of the daub is avoided, the floating smoothness of the floating tube plate is ensured, the qualification rate of one-time assembling is improved, the service life of equipment is prolonged, and the risks of breakage and leakage of the graphite heat exchange tube are reduced; the daub in the assembling process cannot overflow to a position between the fixed tube plate and the cylinder body, so that the problem of clamping and plugging the fixed tube plate due to the overflow of the daub is avoided, and the fixed tube plate and the upper flange of the cylinder body are prevented from being blocked and adversely affected when being pressed and sealed; the tube plate fracture caused by secondary stress generated by expansion with heat and contraction with cold between the fixed tube plate and the cylinder body is prevented.
The graphite tube nest heat exchanger of the invention has the working process that: the material to be treated enters the tube side through the material inlet 8, meanwhile, the service side circulating water enters the shell side through the cooling water inlet 2, the material in the tube side and the service side circulating water in the shell side flow in the tube side and the shell side of the cylinder 1 respectively to exchange heat, then the material in the tube side reaches the material outlet 10 to finish heat exchange and is discharged out of the material outlet 10, and the service side circulating water reaches the circulating water outlet to finish heat exchange and flows out of the cooling water outlet 3.
According to the graphite tube nest heat exchanger and the assembling process method thereof, the manufactured heat exchanger has the advantages of compact structure, good stress condition, simplicity in assembly and operation and convenience in installation and maintenance; the floating head tubular heat exchanger and the graphite tubular heat exchanger which floats smoothly can be guaranteed; the graphite component has the advantages of reducing the bearing load of the graphite component, improving the stress condition, increasing the design pressure, prolonging the service life, improving the heat transfer efficiency, lightening the weight of equipment and reducing the cost.
The invention relates to a graphite tube heat exchanger and an assembly process method application example thereof; the sulfuric acid cooler on the anhydrous hydrofluoric acid project of Guizhou blue sky fluorine chemical Limited company has the equipment model of GHA1300-420, the heat exchange area of 420 square meters, the equipment diameter of 1400mm, 804 heat exchange tubes, phi 32/phi 22, the tube length of 6140mm, the material inlet temperature of 120 ℃, the outlet temperature of 50 ℃, the cooling water inlet of 30 ℃ and the outlet of 35 ℃, and the application effects are as follows:
The above description is only for the purpose of illustrating the present invention and the appended claims, and the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (9)
1. A graphite tube heat exchanger comprises a vertically through cylinder (1), wherein the lower end and the upper end of the cylinder (1) are respectively provided with a cooling water inlet (2) and a cooling water outlet (3), and the upper end of the cylinder (1) is also provided with a vent (17); the end parts of the lower end and the upper end of the cylinder body (1) are respectively provided with a floating tube plate (4) and a fixed tube plate (5), the floating tube plate (4) is connected inside the lower end of the cylinder body (1) in a sliding and sealing manner, the fixed tube plate (5) is fixedly connected at the end part of the upper end of the cylinder body (1), and a plurality of graphite heat exchange tubes (6) are connected between the floating tube plate (4) and the fixed tube plate (5); the lower end of the floating tube plate (4) is connected with a lower anti-corrosion end socket (7), the lower anti-corrosion end socket (7) is provided with a material inlet (8), the upper end of the fixed tube plate (5) is connected with an upper anti-corrosion end socket (9), and the upper anti-corrosion end socket (9) is provided with a material outlet (10); the method is characterized in that: the floating tube plate is characterized in that the upper end of the floating tube plate (4) and the lower end of the fixed tube plate (5) are fixedly connected with a lower cement anti-overflow cylinder (11) and an upper cement anti-overflow cylinder (14) respectively, a lower auxiliary tube plate (12) and an upper auxiliary tube plate (15) are arranged in the lower cement anti-overflow cylinder (11) and the upper cement anti-overflow cylinder (14) respectively, a lower process hole (27) communicated with each other is formed in the lower auxiliary tube plate (12) and the floating tube plate (4), an upper process hole (28) communicated with each other is formed in the upper auxiliary tube plate (15) and the fixed tube plate (5), a lower detachable adjusting screw (13) and an upper detachable adjusting screw (16) are arranged in the lower process hole (27) and the upper process hole (28) respectively, and runners of the lower auxiliary tube plate (12) and the upper auxiliary tube plate (15) are in one-to-one coaxial correspondence.
2. The graphite tube heat exchanger according to claim 1, wherein: and the lower end of the lower anti-corrosion seal head (7) and the upper end of the upper anti-corrosion seal head (9) are respectively provided with a metal lower cover plate (21) and a metal upper cover plate (22).
3. The graphite tube heat exchanger according to claim 1, wherein: and a spring and a nut (23) are arranged at the lower end of the screw rod for fixing the metal lower cover plate (21).
4. The graphite tube heat exchanger according to claim 1, wherein: the cooling water inlet (2) is connected to a semi-annular diversion water jacket (18) on the outer side of the cylinder body (1), and a plurality of water inlet distribution holes (24) are formed in the cylinder wall of the cylinder body (1) in the area, staggered with the cooling water inlet (2), in the semi-annular diversion water jacket (18).
5. The graphite tube heat exchanger according to claim 1, wherein: the longitudinal section of the connecting section of the graphite heat exchange tube (6) with the floating tube plate (4) and the fixed tube plate (5) is tapered.
6. The graphite tube heat exchanger according to claim 1, wherein: a plurality of baffle plates (19) are longitudinally arranged in the cylinder body (1), and the baffle plates (19) are sleeved on the graphite heat exchange tube (6).
7. The graphite tube heat exchanger according to claim 6, characterized in that: the baffles (19) are arranged in a staggered manner in the longitudinal direction.
8. The graphite tube heat exchanger according to claim 6, characterized in that: the baffle plate (19) is mounted through a positioning stop block (20) fixed on a distance rod (26), and the positioning stop block (20) is adhered to the distance rod (26) and fixed through a positioning pin (25).
9. A method of assembling a graphite tube heat exchanger according to claim 1, comprising the steps of:
1) Firstly, a baffle plate (19), a lower auxiliary tube plate (12) and an upper auxiliary tube plate (15) are arranged in a cylinder body (1), and then graphite heat exchange tubes (6) sequentially penetrate through flow channels on the lower auxiliary tube plate (12), the baffle plate (19) and the upper auxiliary tube plate (15);
2) Respectively bonding and fixing the fixed tube plate (5) and the upper cement overflow preventing cylinder (14) and the floating tube plate (4) and the lower cement overflow preventing cylinder (11);
3) Daubing daub on two ends of the inserted graphite heat exchange tube (6), and then respectively installing the fixed tube plate (5) and the floating tube plate (4) at two ends of the graphite heat exchange tube (6) to enable two ends of the graphite heat exchange tube (6) to be respectively inserted into the flow channels of the floating tube plate (4) and the fixed tube plate (5);
4) Sequentially penetrating a lower detachable adjusting screw (13) and an upper detachable adjusting screw (16) into a lower process hole (27) and an upper process hole (28) on the corresponding side, screwing nuts at two ends, extruding redundant cement between a lower auxiliary tube plate (12) and a floating tube plate (4) and between an upper auxiliary tube plate (15) and a fixed tube plate (5) through tensioning adjustment of the lower detachable adjusting screw (13) and the upper detachable adjusting screw (16), matching with a lower cement anti-overflow cylinder (11) and an upper cement anti-overflow cylinder (14) on the corresponding side to complete functions similar to an injector, and extruding the redundant cement into a gap to enable the cement in the bonding gap to be more compact and exhaust air holes side by side;
5) And (4) installing the rest parts according to a conventional method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010425092.3A CN111504092A (en) | 2020-05-19 | 2020-05-19 | Graphite tube-array heat exchanger and assembling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010425092.3A CN111504092A (en) | 2020-05-19 | 2020-05-19 | Graphite tube-array heat exchanger and assembling method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111504092A true CN111504092A (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010425092.3A Pending CN111504092A (en) | 2020-05-19 | 2020-05-19 | Graphite tube-array heat exchanger and assembling method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797838A (en) * | 2021-01-15 | 2021-05-14 | 辽阳市隆达化工设备有限公司 | High-efficient shock attenuation graphite heat exchanger |
| CN113001101A (en) * | 2021-04-09 | 2021-06-22 | 鲁西工业装备有限公司 | Vertical assembling process for industrial heat exchanger and mounting device and application thereof |
| CN115138539A (en) * | 2022-06-28 | 2022-10-04 | 贵州兰鑫石墨机电设备制造有限公司 | Glue injection repairing method and glue injection device for abnormal sound of distance tube of graphite tube heat exchanger |
-
2020
- 2020-05-19 CN CN202010425092.3A patent/CN111504092A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797838A (en) * | 2021-01-15 | 2021-05-14 | 辽阳市隆达化工设备有限公司 | High-efficient shock attenuation graphite heat exchanger |
| CN113001101A (en) * | 2021-04-09 | 2021-06-22 | 鲁西工业装备有限公司 | Vertical assembling process for industrial heat exchanger and mounting device and application thereof |
| CN115138539A (en) * | 2022-06-28 | 2022-10-04 | 贵州兰鑫石墨机电设备制造有限公司 | Glue injection repairing method and glue injection device for abnormal sound of distance tube of graphite tube heat exchanger |
| CN115138539B (en) * | 2022-06-28 | 2024-05-03 | 贵州兰鑫石墨机电设备制造有限公司 | Glue injection repairing method and glue injection device for abnormal sound of distance tube of graphite tube heat exchanger |
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