Double-water-chamber heat exchanger

Abstract

The utility model discloses a double-water-chamber heat exchanger which is characterized by comprising a shell, a pipe system arranged in the shell, a water supply chamber arranged below the shell and fixedly welded with the pipe system, a water outlet chamber arranged above the shell and fixedly welded with the pipe system, and a skirt arranged at the bottom of the water supply chamber and used for fixing the water supply chamber, two ends of the piping system are welded, sealed and fixed with the upper and lower ends of the shell; the water supply chamber is communicated with the water outlet chamber through the piping system; the water supply chamber and the water outlet chamber are communicated through the heat exchange pipe in the pipe system, so that cold water is subjected to efficient heat exchange with fed steam after passing through the pipe system, water is effectively heated, and energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to a double-water chamber heat exchanger. Background Art

[0002] The heat exchanger is one of the more important equipment in the heat recovery system of the steam turbine unit in a power plant. With the continuous advancement of technology and the increasing requirements for the economy of generator sets, the cooling of the high-pressure heater of large units has developed from being built into the body to a separate heat exchange device separated from the body.

[0003] Existing heat exchangers can exchange heat for liquids through pipes or for gases through pipes. The conventional method of exchanging heat for liquids through pipes is to let water enter through a single water chamber and then discharge the water after heat exchange at the lower end of the shell. Moreover, since the water flows from top to bottom, the steam heat exchange is uneven and the heat exchange efficiency is low. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a double-water chamber heat exchanger which can effectively improve heat exchange efficiency and reduce energy loss.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A double water chamber heat exchanger comprises an outer shell, a pipe system arranged inside the outer shell, a water supply chamber arranged below the outer shell and welded and fixed to the pipe system, a water outlet chamber arranged above the outer shell and welded and fixed to the pipe system, a skirt seat arranged at the bottom of the water supply chamber and used to fix the water supply chamber, both ends of the pipe system are welded and sealed to the upper and lower ends of the outer shell, and the water supply chamber is connected to the water outlet chamber through the pipe system.

[0007] Preferably, the shell includes a shell body, a steam delivery interface arranged on one side of the upper end of the shell body, a safety valve interface arranged on the other side of the upper end of the shell body, a nitrogen delivery interface arranged at the lower end of the shell body and on the same side as the safety valve interface, an exhaust interface arranged at the upper and lower ends of the surface of the shell body and used in conjunction with the safety valve interface, a drainage interface arranged at the lower end of the shell body and on the same side as the nitrogen delivery interface, and an emergency drain port arranged at the lower end of the shell body and cooperating with the drainage interface for timely drainage.

[0008] Preferably, the pipe system includes an upper tube plate which is welded and fixed to the upper end of the outer shell on the inner side and to the water outlet chamber on the outer side, a lower tube plate which is welded and fixed to the lower end of the outer shell on the inner side and to the water supply chamber on the outer side, a distance tube which is inserted into the upper tube plate at one end and fixed by screws and extends to the lower tube plate at the other end, an insulation plate which is fixedly mounted on the distance tube and close to the upper tube plate, a baffle which is offset from top to bottom on the distance tube, a steam inlet baffle which is arranged on one side below the upper tube plate, a bottom plate which is located at the tail end of the distance tube and is fixed by the distance tube with nuts and pull rods, and a heat exchange tube which passes through the upper tube plate at one end to connect to the water outlet chamber and passes through the lower tube plate at the other end to connect to the water supply chamber.

[0009] Furthermore, an upper tube plate water guide port is provided on the surface side of the upper tube plate facing the water outlet chamber, and an upper tube plate water guide interface connected to the upper tube plate water guide port is welded on the side of the upper tube plate.

[0010] Furthermore, a lower tube plate water guide port is provided on the surface side of the lower tube plate facing the shell, and a lower tube plate water guide interface connected to the lower tube plate water guide port is welded on the side of the lower tube plate.

[0011] Furthermore, the spacing density of the baffles near the lower tube sheet at the lower end of the pipe system is greater than that of the baffles near the upper tube sheet.

[0012] Preferably, the water supply chamber includes a water supply chamber section barrel, a water supply chamber head welded to the lower end of the water supply chamber section barrel, a water supply port arranged on one side of the water supply chamber section barrel, and a water supply chamber manhole arranged on the other side of the water supply chamber section barrel, and a water supply chamber drain pipe is welded to the bottom of the water supply chamber head.

[0013] Preferably, the water outlet chamber includes a water outlet chamber section cylinder, a water outlet chamber head welded to the upper end of the water outlet chamber section cylinder, a water outlet arranged on one side of the water outlet chamber section cylinder, and a water outlet chamber manhole arranged on the other side of the water outlet chamber section cylinder, and a water outlet chamber exhaust pipe is welded on the top of the water outlet chamber head.

[0014] The beneficial effect of the utility model is that the utility model connects the water supply chamber and the water outlet chamber through the heat exchange pipe in the pipe system, so that the cold water can efficiently exchange heat with the steam sent in after passing through the pipe system, thereby realizing effective heating of the water, thereby reducing energy loss, achieving full utilization of energy and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a double water chamber heat exchanger according to this embodiment;

[0016] Figure 2 for Figure 1 Structural diagram of the middle shell;

[0017] Figure 3 for Figure 1 Schematic diagram of the structure of the central pipe system;

[0018] Figure 4 for Figure 1 Schematic diagram of the structure of the middle water supply chamber and the skirt seat;

[0019] Figure 5 for Figure 1 Schematic diagram of the structure of the middle water outlet chamber. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0021] Example

[0022] like Figure 1-5 As shown, a double water chamber heat exchanger includes a shell 1, a pipe system 2 arranged inside the shell 1, a water supply chamber 3 arranged below the shell 1 and welded and fixed to the pipe system 2, a water outlet chamber 4 arranged above the shell 1 and welded and fixed to the pipe system 2, a skirt 5 arranged at the bottom of the water supply chamber 3 and used to fix the water supply chamber 3, both ends of the pipe system 2 are welded and sealed to the upper and lower ends of the shell 1, and the water supply chamber 3 is connected to the water outlet chamber 4 through the pipe system 2.

[0023] The shell 1 includes a shell body 11, a steam delivery interface 12 arranged on one side of the upper end of the shell body 11, a safety valve interface 13 arranged on the other side of the upper end of the shell body 11, a nitrogen delivery interface 14 arranged at the lower end of the shell body 11 and on the same side as the safety valve interface 13, an exhaust interface 15 arranged at the upper and lower ends of the surface of the shell body 11 and used in conjunction with the safety valve interface 13, a drainage interface 16 arranged at the lower end of the shell body 11 and on the same side as the nitrogen delivery interface 15, and an emergency drain port 17 arranged at the lower end of the shell body 11 and cooperating with the drainage interface 16 for timely drainage.

[0024] The solution is equipped with a safety valve interface and an emergency drain port, which is conducive to the timely discharge of excessively pressurized gas or liquid under specific circumstances to ensure the safety of equipment and operators.

[0025] The pipe system 2 includes an upper tube plate 21 whose inner side is welded and fixed to the upper end of the outer shell 1 and whose outer side is welded and fixed to the water outlet chamber 4, a lower tube plate 22 whose inner side is welded and fixed to the lower end of the outer shell 1 and whose outer side is welded and fixed to the water supply chamber 3, a distance tube 23 whose one end is inserted into the upper tube plate 21 and fixed by screws and whose other end extends to the vicinity of the lower tube plate 22, a heat insulation plate 24 fixedly mounted on the distance tube 23 and close to the upper tube plate 21, a baffle 25 offset from top to bottom and mounted on the distance tube 23, a steam inlet baffle 26 arranged on one side below the upper tube plate 21, a bottom plate 27 located at the tail end of the distance tube 23 and fixed by the distance tube 23 with nuts and pull rods, and a heat exchange tube 28 whose one end passes through the upper tube plate 21 to connect to the water outlet chamber 4 and the other end passes through the lower tube plate 22 to connect to the water supply chamber 3.

[0026] It should be further explained that the steam inlet baffle 26 is directly opposite to the steam delivery interface 12, and its upper end is welded and fixed to the insulation plate 24, and its lower end is extended to the first baffle on this side and welded and fixed to the baffle.

[0027] The upper tube plate 21 is provided with an upper tube plate water guide port 211 on the side of the surface facing the water outlet chamber 4, and an upper tube plate water guide interface 212 connected to the upper tube plate water guide port 211 is welded on the side of the upper tube plate 21. Specifically, the water in the water outlet chamber 4 can be drained through the cooperation of the upper tube plate water guide port 211 and the upper tube plate water guide interface 212.

[0028] The lower tube plate 22 is provided with a lower tube plate water guide port 221 on the side of the surface facing the shell 1, and a lower tube plate water guide interface 222 connected to the lower tube plate water guide port 221 is welded on the side of the lower tube plate 22. Specifically, the condensed water formed by the steam heat exchange in the shell 1 can be drained through the lower tube plate water guide port 221 and the lower tube plate water guide interface 222.

[0029] It should be further explained that the spacing density of the baffles near the lower tube sheet 22 at the lower end of the pipe system 2 is greater than the spacing density of the baffles near the upper tube sheet 21. Specifically, since cold water is transported upward from the water supply chamber 3 to the water outlet chamber 4 through the heat exchange tubes 28, after the steam is transported to the pipe system 2, the dense baffles allow the steam to fully contact the heat exchange tubes 28 to complete the heat exchange.

[0030] The water supply chamber 3 includes a water supply chamber section barrel 31, a water supply chamber head 32 welded to the lower end of the water supply chamber section barrel 31, a water supply port 33 arranged on one side of the water supply chamber section barrel 31, and a water supply chamber manhole 34 arranged on the other side of the water supply chamber section barrel 31. A water supply chamber drain pipe 321 is welded to the bottom of the water supply chamber head 32.

[0031] The water outlet chamber 4 includes a water outlet chamber section cylinder 41, a water outlet chamber head 42 welded to the upper end of the water outlet chamber section cylinder 41, a water outlet 43 arranged on one side of the water outlet chamber section cylinder 41, and a water outlet chamber manhole 44 arranged on the other side of the water outlet chamber section cylinder 41. A water outlet chamber exhaust pipe 421 is welded to the top of the water outlet chamber head 42.

[0032] It should be further explained that during the heat exchange process, after the cold water enters the cavity formed by the water supply chamber section cylinder 31 and the water supply chamber head 32 through the water supply port 33, due to continuous pressurization, the cold water is transported upward through the heat exchange tube 28, heat is exchanged in the pipe system 2, and finally flows into the cavity formed by the water outlet chamber section cylinder 41 and the water outlet chamber head 42, and then discharged through the water outlet 43.

[0033] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A double water chamber heat exchanger, characterized in that: It includes an outer shell, a pipe system arranged inside the outer shell, a water supply chamber arranged below the outer shell and welded and fixed to the pipe system, a water outlet chamber arranged above the outer shell and welded and fixed to the pipe system, a skirt seat arranged at the bottom of the water supply chamber and used to fix the water supply chamber, both ends of the pipe system are welded and sealed to the upper and lower ends of the outer shell, and the water supply chamber is connected to the water outlet chamber through the pipe system.

2. The double water chamber heat exchanger according to claim 1, characterized in that: The shell includes a shell body, a steam delivery interface arranged on one side of the upper end of the shell body, a safety valve interface arranged on the other side of the upper end of the shell body, a nitrogen delivery interface arranged at the lower end of the shell body and on the same side as the safety valve interface, an exhaust interface arranged at the upper and lower ends of the surface of the shell body and used in conjunction with the safety valve interface, a drainage interface arranged at the lower end of the shell body and on the same side as the nitrogen delivery interface, and an emergency drain port arranged at the lower end of the shell body and cooperating with the drainage interface for timely drainage.

3. The double water chamber heat exchanger according to claim 1, characterized in that: The pipe system includes an upper tube plate which is welded and fixed to the upper end of the outer shell on the inner side and to the water outlet chamber on the outer side, a lower tube plate which is welded and fixed to the lower end of the outer shell on the inner side and to the water supply chamber on the outer side, a distance tube which is inserted into the upper tube plate at one end and fixed by screws and extends to the lower tube plate at the other end, a heat insulation plate which is fixedly mounted on the distance tube and close to the upper tube plate, a baffle which is offsetly mounted on the distance tube from top to bottom, a steam inlet baffle which is arranged on one side below the upper tube plate, a bottom plate which is located at the tail end of the distance tube and is fixed by the distance tube with nuts and tie rods, and a heat exchange tube which passes through the upper tube plate at one end and connects to the water outlet chamber and passes through the lower tube plate at the other end and connects to the water supply chamber.

4. The double water chamber heat exchanger according to claim 3, characterized in that: An upper tube plate water guide port is provided on the surface side of the upper tube plate facing the water outlet chamber, and an upper tube plate water guide interface connected to the upper tube plate water guide port is welded on the side of the upper tube plate.

5. The double water chamber heat exchanger according to claim 3, characterized in that: A lower tube plate water guide port is provided on the surface side of the lower tube plate facing the shell, and a lower tube plate water guide interface connected to the lower tube plate water guide port is welded on the side of the lower tube plate.

6. The double water chamber heat exchanger according to claim 3, characterized in that: The spacing density of the baffles near the lower tube sheet at the lower end of the pipe system is greater than that of the baffles near the upper tube sheet.

7. The double water chamber heat exchanger according to claim 1, characterized in that: The water supply chamber includes a water supply chamber section barrel, a water supply chamber head welded to the lower end of the water supply chamber section barrel, a water supply port arranged on one side of the water supply chamber section barrel, and a water supply chamber manhole arranged on the other side of the water supply chamber section barrel. A water supply chamber drain pipe is welded to the bottom of the water supply chamber head.

8. The double water chamber heat exchanger according to claim 1, characterized in that: The water outlet chamber includes a water outlet chamber section barrel, a water outlet chamber head welded to the upper end of the water outlet chamber section barrel, a water outlet arranged on one side of the water outlet chamber section barrel, and a water outlet chamber manhole arranged on the other side of the water outlet chamber section barrel. A water outlet chamber exhaust pipe is welded on the top of the water outlet chamber head.

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