CN216385207U - Heat exchanger with heat exchange tube provided with protective sleeve - Google Patents
Heat exchanger with heat exchange tube provided with protective sleeve Download PDFInfo
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- CN216385207U CN216385207U CN202122909307.1U CN202122909307U CN216385207U CN 216385207 U CN216385207 U CN 216385207U CN 202122909307 U CN202122909307 U CN 202122909307U CN 216385207 U CN216385207 U CN 216385207U
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Abstract
The utility model discloses a heat exchanger with a heat exchange tube provided with a protective sleeve. An upper tube plate and a lower tube plate are arranged on the shell pass cylinder, and the heat exchange tube is fixed between the upper tube plate and the lower tube plate; an upper pipe box and a lower pipe box are respectively arranged at the upper end and the lower end of the shell pass cylinder; the lower extreme of heat exchange tube is provided with the protecting pipe, and the protecting pipe can insert in the heat exchange tube, and the lower part of lower tube sheet is equipped with wear-resisting castable insulating layer, and the lower extreme of protecting pipe is parallel and level with the lower bottom surface of wear-resisting castable insulating layer. The impact of coal gas mixed with pulverized coal entering the heat exchange pipe can be avoided by the protective sleeve, the wear-resistant castable heat-insulating layer can play a role in heat insulation and protection, and the service life of the lower pipe plate is prolonged. The spray pipes are arranged in the lower pipe box and on the upper part of the pipe pass inlet pipe, the spray heads are arranged on the lower parts of the spray pipes, coal gas entering the lower pipe box can be sprayed and washed, so that coal powder in the coal gas is separated from the gas, impact and abrasion on the heat exchange pipe are reduced, and the service lives of the lower pipe plate and the heat exchange pipe are prolonged.
Description
Technical Field
The utility model belongs to the technical field of heat exchangers, and particularly relates to a vertical tube-shell heat exchanger.
Background
The heat exchanger is a device for transferring part of heat of hot fluid to cold fluid, and is also called as a heat exchanger. The heat exchanger is a common heat exchange device, plays an important role in chemical industry, petroleum industry, power industry, food industry and other industrial production, can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in chemical industry production, and is widely applied. The utilization rate of energy is effectively improved by using a large number of heat exchangers, the cost of enterprises is reduced, and the benefit is improved. The heat exchangers are of various types and are classified into shell-and-tube heat exchangers, spiral plate heat exchangers, serpentine tube heat exchangers, plate heat exchangers, double-tube heat exchangers, and the like according to structural forms. The most common are shell and tube heat exchangers, including fixed tube and plate heat exchangers, floating head heat exchangers, U-tube heat exchangers, and packed box heat exchangers.
At present, the tube-shell heat exchanger is widely used, the main structure of the tube-shell heat exchanger is formed by connecting a series of components such as a tube box or an end socket, a cylinder, a tube plate, a heat exchange tube, a baffle plate (baffle plate) and the like, the cylinder is mostly cylindrical, the heat exchange tube is arranged in the cylinder and is a main heat transfer element, and two ends of the heat exchange tube are fixed on the tube plate. Wherein, one of the cold fluid and the hot fluid for heat exchange flows in the heat exchange tube and is called tube pass fluid; the other flows outside the heat exchange tubes and is called shell-side fluid. The fluid is referred to as one tube pass per pass through the tube bundle and one shell pass per pass through the shell. The tube box and the heat exchange tube are internally provided with a medium for bearing tube pass pressure; the shell and the heat exchange tube are externally provided with another medium for bearing shell pass pressure; generally, the pressure and the medium temperature on the tube side and the shell side are different.
In the prior art, a pulverized coal furnace gas station heat exchanger is used for cooling gas, the heat exchanger is vertical, a tube pass medium enters from bottom to top, the tube pass medium entering from an inlet of a lower tube box is coal powder mixed with coal powder, the temperature is high (more than 500 ℃), the welded joint of a heat exchange tube and a tube plate is easily abraded by the impact of the coal powder, further corrosion and leakage are generated, and the leaked gas can cause certain danger.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a heat exchanger with a heat exchange tube provided with a protective sleeve, so as to solve the problems that the welding joint of the heat exchange tube and a tube plate, which is provided by the background art, is easily abraded by the impact of pulverized coal, and further generates corrosion and leakage.
The technical scheme adopted by the utility model for realizing the purpose is as follows:
a heat exchanger with a heat exchange tube provided with a protective sleeve comprises a tube pass part and a shell pass part, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchange tubes; an upper tube box is arranged at the upper end of the shell pass cylinder and on the outer side of the upper tube plate, and a lower tube box is arranged at the lower end of the shell pass cylinder and on the outer side of the lower tube plate; the tube side exit tube set up in the top of last pipe case, the tube side advances the pipe and sets up in the lateral wall lower part of pipe case down, the shell side exit tube sets up in the lateral wall upper portion of shell side barrel, the shell side advances the pipe and sets up in the lateral wall lower part of shell side barrel, its characterized in that: the heat exchange tube is characterized in that a protective sleeve is arranged at the lower end of the heat exchange tube, the outer diameter of the protective sleeve corresponds to the inner diameter of the heat exchange tube and can be inserted into the heat exchange tube, an outward-turned flange is arranged at the lower end of the protective sleeve, and after the protective sleeve is inserted into the heat exchange tube, the outward-turned flange at the lower end of the protective sleeve can shield a connecting welding line between the heat exchange tube and a lower tube plate.
By adopting the technical scheme, the connecting welding line between the heat exchange tube and the lower tube plate is shielded by the outward-turning flange at the lower end of the protective sleeve, and coal gas mixed with pulverized coal entering from the tube pass can only impact the outward-turning flange at the lower end, so that the connecting welding line between the heat exchange tube and the lower tube plate is protected, is not easy to cause abrasion, and further avoids corrosion and leakage.
In the heat exchanger with the heat exchange tube provided with the protective sleeve, the lower part of the lower tube plate is provided with the wear-resistant castable heat-insulating layer, and the lower end of the protective sleeve is flush with the lower bottom surface of the wear-resistant castable heat-insulating layer.
Through adopting above-mentioned technical scheme, the lower part of tube sheet is equipped with wear-resisting castable insulating layer down, can fix the protecting pipe on the one hand, and on the other hand can avoid advancing the impact that the coal gas that is mingled with the buggy that the pipe got into by the tube side to tube sheet down, can also play thermal-insulated guard's effect, improves the life of tube sheet down.
Furthermore, a spray pipe is arranged in the lower pipe box and on the upper part of the pipe pass inlet pipe, a spray head communicated with the spray pipe is arranged on the lower part of the spray pipe, and a sewage discharge outlet is arranged at the bottom of the lower pipe box.
Through adopting above-mentioned technical scheme, can spray to the coal gas that is mingled with the buggy that enters into by the tube side inlet pipe and erode, make the buggy in the coal gas separate from the gas after contacting with liquid, discharge by the drain of lower tube case bottom at last, can reduce the buggy concentration in the coal gas that enters into by the tube side inlet pipe, and then reduce impact and the wearing and tearing to the heat exchange tube, also can cool down the coal gas that gets into the heat exchange tube, improve the life of tube sheet and heat exchange tube down.
Furthermore, the spray pipes are arranged in an annular and horizontal mode, the outer sides of the spray pipes are connected to the inner side wall of the lower pipe box through the support, and a spray pipe interface communicated with the spray pipes is arranged on the lower pipe box.
Has the advantages that:
according to the technical scheme, the connecting welding line between the heat exchange tube and the lower tube plate is shielded by the outward-turned flange at the lower end of the protective sleeve, and coal gas mixed with coal dust entering from the tube pass inlet tube can only impact the outward-turned flange at the lower end, so that the connecting welding line between the heat exchange tube and the lower tube plate is protected, abrasion is not easily caused, and further corrosion and leakage are avoided. The lower part of the lower tube plate is provided with a wear-resistant castable heat-insulating layer, so that the protective sleeve can be fixed, and on the other hand, the impact of coal gas mixed with pulverized coal entering from a tube pass on the lower tube plate can be avoided, the heat-insulating protection effect can be achieved, and the service life of the lower tube plate is prolonged. And the spray pipes are arranged in the lower pipe box and on the upper part of the pipe pass inlet pipe, coal gas which is mixed with coal powder and enters from the pipe pass inlet pipe can be sprayed and washed, so that the coal powder in the coal gas is separated from the gas after contacting with liquid, and finally the coal gas is discharged from the drain outlet at the bottom of the lower pipe box, thereby reducing the concentration of the coal powder in the coal gas entering from the pipe pass inlet pipe, further reducing the impact and the abrasion on the heat exchange pipe, also reducing the temperature of the coal gas entering the heat exchange pipe, and prolonging the service life of the lower pipe plate and the heat exchange pipe.
Drawings
Fig. 1 is a schematic front view of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a schematic view of the sheath tube of the present invention.
Fig. 4 is an enlarged schematic view of a portion a in fig. 1.
In the figure: 1 tube pass inlet tube, 2 shell pass inlet tubes, 3 lower tube plates, 4 pull rods, 5 shell pass outlet tubes, 6 tube pass outlet tubes, 7 upper tube box, 8 upper tube plate, 9 shell pass cylinder bodies, 10 heat exchange tubes, 11 baffle plates, 12 spray tube interfaces, 13 spray tubes, 14 spray heads, 15 lower tube box, 16 sewage outlet, 17 wear-resistant castable heat-insulating layer, 18 protective sleeve tubes, 181 flanges and 19 supports.
Detailed Description
The utility model will now be further illustrated by way of non-limiting examples in connection with the accompanying drawings.
Referring to fig. 1 to 4, a heat exchanger with a heat exchange tube having a sheath tube comprises a tube side part and a shell side part, wherein the tube side part comprises a tube side inlet tube 1, a tube side outlet tube 6 and a plurality of heat exchange tubes 10, the shell side part comprises a shell side cylinder 9, a shell side inlet tube 2 and a shell side outlet tube 5, an upper tube plate 8 with a plurality of tube holes is arranged at the upper end of the shell side cylinder 9, a lower tube plate 3 with a plurality of tube holes is arranged at the lower end of the shell side cylinder 9, and tube ends of the heat exchange tubes 10 are inserted into and fixed in the tube holes of the upper tube plate 8 and the lower tube plate 3 and fixed between the upper tube plate 8 and the lower tube plate 3; an upper tube box 7 is arranged at the upper end of the shell-side cylinder 9 and on the outer side of the upper tube plate 8, and a lower tube box 15 is arranged at the lower end of the shell-side cylinder 9 and on the outer side of the lower tube plate 3; the tube pass outlet pipe 6 is arranged at the top of the upper tube box 7, the tube pass inlet pipe 1 is arranged at the lower part of the side wall of the lower tube box 15, the shell pass outlet pipe 5 is arranged at the upper part of the side wall of the shell pass cylinder 9, and the shell pass inlet pipe 2 is arranged at the lower part of the side wall of the shell pass cylinder 9. The lower end of the heat exchange tube 10 is provided with a protecting sleeve 18, the outer diameter of the protecting sleeve 18 corresponds to the inner diameter of the heat exchange tube 10 and can be inserted into the heat exchange tube 10, the lower end of the protecting sleeve 18 is provided with an outward-turned flange 181, and after the protecting sleeve 18 is inserted into the heat exchange tube 10, the outward-turned flange 181 at the lower end can shield a connecting welding seam between the heat exchange tube 10 and the lower tube plate 3.
In this embodiment, the lower portion of the lower tube plate 3 is further provided with a wear-resistant castable heat-insulating layer 17, and the lower end of the protective sleeve 18 is flush with the lower bottom surface of the wear-resistant castable heat-insulating layer 17.
A spray pipe 13 is arranged in the lower pipe box 15 and on the upper part of the pipe pass inlet pipe 1, a spray head 14 communicated with the spray pipe 13 is arranged on the lower part of the spray pipe 13, and a sewage outlet 16 is arranged at the bottom of the lower pipe box 15.
The spray pipes 13 are arranged in an annular and horizontal manner, the outer sides of the spray pipes 13 are connected to the inner side wall of the lower pipe box 15 through a support 19, and the lower pipe box 15 is provided with a spray pipe interface 12 communicated with the spray pipes 13.
The working process of the embodiment:
the cold fluid medium of the shell pass, water, enters the shell pass cylinder 9 from the shell pass inlet pipe 2, passes through the tube bundle formed by the heat exchange tubes 10 in the shell pass, exchanges heat with the hot fluid, namely coal gas, in the heat exchange tubes 10, then heats up to become hot water or steam, and finally flows out from the shell pass outlet pipe 5. The waste heat of the coal gas is recycled by exchanging through a larger heat exchange area. The water is not in direct contact with the coal gas, so that sewage is not generated, and the environmental protection requirement advocated by the state at present is met. The heat flow medium-coal gas of the tube pass part firstly enters the lower tube box 15 from the tube pass inlet tube 1 and meets spray water sprayed by the spray head 14, so that coal powder in the coal gas is separated from the gas after contacting with the water and finally discharged from a sewage discharge port 16 at the bottom of the lower tube box 15; pure coal gas is cooled by a shell medium through the heat exchange tube 10 from bottom to top, then enters the upper tube box 7 and finally flows out of the tube pass outlet tube 6, and tube pass fluid exchanges heat with shell pass water when flowing through the heat exchange tube 10.
The above-mentioned embodiments are only for understanding the present invention, and are not intended to limit the technical solutions of the present invention, and those skilled in the relevant art can make various changes or modifications based on the technical solutions described in the claims, and all equivalent changes or modifications should be covered by the scope of the claims of the present invention.
Claims (4)
1. A heat exchanger with a heat exchange tube provided with a protective sleeve comprises a tube pass part and a shell pass part, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchange tubes; an upper tube box is arranged at the upper end of the shell pass cylinder and on the outer side of the upper tube plate, and a lower tube box is arranged at the lower end of the shell pass cylinder and on the outer side of the lower tube plate; the tube side exit tube set up in the top of last pipe case, the tube side advances the pipe and sets up in the lateral wall lower part of pipe case down, the shell side exit tube sets up in the lateral wall upper portion of shell side barrel, the shell side advances the pipe and sets up in the lateral wall lower part of shell side barrel, its characterized in that: the heat exchange tube is characterized in that a protective sleeve is arranged at the lower end of the heat exchange tube, the outer diameter of the protective sleeve corresponds to the inner diameter of the heat exchange tube and can be inserted into the heat exchange tube, an outward-turned flange is arranged at the lower end of the protective sleeve, and after the protective sleeve is inserted into the heat exchange tube, the outward-turned flange at the lower end of the protective sleeve can shield a connecting welding line between the heat exchange tube and a lower tube plate.
2. The heat exchanger with the heat exchange tube provided with the protective sleeve as claimed in claim 1, is characterized in that: the lower part of the lower tube plate is provided with a wear-resistant castable heat-insulating layer, and the lower end of the protective sleeve is flush with the lower bottom surface of the wear-resistant castable heat-insulating layer.
3. A heat exchanger having a heat exchange tube with a sheath tube according to claim 1 or 2, wherein: and a spray pipe is arranged in the lower pipe box and on the upper part of the pipe pass inlet pipe, a spray head communicated with the spray pipe is arranged on the lower part of the spray pipe, and a sewage draining outlet is arranged at the bottom of the lower pipe box.
4. A heat exchanger with a heat exchange tube having a sheath tube according to claim 3, wherein: the spray pipes are arranged in an annular and horizontal mode, the outer sides of the spray pipes are connected to the inner side wall of the lower pipe box through the support, and a spray pipe interface communicated with the spray pipes is arranged on the lower pipe box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122909307.1U CN216385207U (en) | 2021-11-20 | 2021-11-20 | Heat exchanger with heat exchange tube provided with protective sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122909307.1U CN216385207U (en) | 2021-11-20 | 2021-11-20 | Heat exchanger with heat exchange tube provided with protective sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216385207U true CN216385207U (en) | 2022-04-26 |
Family
ID=81218432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122909307.1U Active CN216385207U (en) | 2021-11-20 | 2021-11-20 | Heat exchanger with heat exchange tube provided with protective sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216385207U (en) |
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2021
- 2021-11-20 CN CN202122909307.1U patent/CN216385207U/en active Active
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