Gravity drainage condenser for vacuum heat exchange system

By designing the drainage system of the water collecting tank and the water storage tank in the condenser of the vacuum heat exchange system, the problem of pressure relief caused by gravity discharge of condensate water is solved, and efficient condensate discharge and vacuum environmental protection are achieved.

CN222635245UActive Publication Date: 2025-03-18HIT HARBIN INST OF TECH KINT TECH
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Patent Information

Application Number
CN202420550799.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-20
Publication Date
2025-03-18
Estimated Expiration
2034-03-20

AI Technical Summary

Technical Problem

In a vacuum heat exchange system, the gravity discharge of condensate water will cause pressure relief, destroying the vacuum environment of the system, and thus affecting the heat exchange efficiency.

Method used

A gravity drainage condenser is designed. By connecting the water storage tank under the water collection tank and setting a drain pipe and drain valve between the water collection tank and the water storage tank, the gravity discharge of the condensed water is achieved without destroying the vacuum environment.

Benefits of technology

This design realizes the gravity discharge of condensate water without external power, avoids the damage to the vacuum environment by pressure relief and improves the working efficiency of the condenser.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model discloses a gravity drainage condenser for a vacuum heat exchange system, and belongs to the technical field of energy conservation and environmental protection. The condenser solves the problem that an original vacuum environment of a heat exchange system is damaged in the water drainage and pressure relief process of an existing condenser. The water collecting tank is located below the heat exchange tube set and communicated with the bottom end of the tube pass of the heat exchange tube set, the partition plate is fixedly installed between the top end of the heat exchange tube set and the top end of the shell in a sealed mode and divides the heat exchange tube set into an inlet side heat exchange tube set and an outlet side heat exchange tube set, and the flash steam inlet is communicated with the top end of the tube pass of the inlet side heat exchange tube set. Cooling water enters the shell sides of the heat exchange pipe sets, the water collection tank is connected with the water storage tank through a water drainage pipe, a water drainage valve is arranged on the water drainage pipe, the water storage tank is connected with the vacuum pump through a second air suction pipeline, and a balance valve is arranged on the second air suction pipeline. And the water storage tank is also connected with an air breaking valve. The original vacuum environment of the heat exchange system is not damaged in the water drainage and pressure relief process.
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Description

Technical Field

[0001] The utility model relates to a gravity drainage condenser for a vacuum heat exchange system, belonging to the technical field of energy conservation and environmental protection. Background Art

[0002] In the prior art, the recovery of waste heat from industrial wastewater through the principle of negative pressure flash evaporation has become the only choice for waste heat recovery of highly polluting, highly corrosive, and highly abrasive wastewater. The condensed water generated after the exhaust steam enters the condenser for heat exchange needs to be discharged regularly to ensure the normal heat exchange. However, because the entire heat exchange system is a vacuum-sealed environment, the condenser needs to be depressurized during the gravity discharge process, and the pressure relief will destroy the original vacuum environment of the heat exchange system. Therefore, there is an urgent need for a condenser that can ensure that the original vacuum environment of the heat exchange system is not destroyed during the discharge and pressure relief process. Utility Model Content

[0003] The utility model is to solve the above technical problems and further provides a gravity drainage condenser for a vacuum heat exchange system.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A gravity drainage condenser for a vacuum heat exchange system comprises a vacuum pump, a shell, a heat exchange tube group, a water collecting tank, a partition and a water storage tank.

[0006] The water collecting tank is located below the heat exchange tube group and is connected to the bottom of the tube of the heat exchange tube group. The baffle seal is fixed between the top of the heat exchange tube group and the top of the shell, and the heat exchange tube group is divided into an inlet side heat exchange tube group and an outlet side heat exchange tube group.

[0007] A flash steam inlet and a steam outlet are provided on the upper part of the shell. The flash steam inlet is communicated with the top of the tube side of the heat exchange tube group on the inlet side, and the steam outlet is communicated with the top of the tube side of the heat exchange tube group on the outlet side. The vacuum pump is connected to the steam outlet through a first exhaust pipeline.

[0008] The lower part of the shell is provided with a cooling water inlet, and the upper part is provided with a cooling water outlet. The cooling water enters the shell side of the heat exchange tube group.

[0009] The water collecting box and the water storage tank are connected by a drain pipe, and a drain valve is arranged on the drain pipe. The water storage tank and the vacuum pump are connected by a second air extraction pipeline, and a balancing valve is arranged on the second air extraction pipeline. The water storage tank is also connected with an air breaking valve.

[0010] Further, one end of the drainage pipe is connected to the bottom of the water collecting tank, and the other end is connected to the upper part of the water storage tank.

[0011] Furthermore, a drain pipe is connected to the water storage tank, and a drain valve is provided on the drain pipe.

[0012] Furthermore, the water discharge pipe is connected and arranged at the lower part of the water storage tank.

[0013] Furthermore, the air-breaking valve is connected and arranged on the top of the water storage tank.

[0014] Furthermore, the second air extraction pipeline is connected to the top of the water storage tank.

[0015] Furthermore, the number of heat exchange tubes in the inlet-side heat exchange tube group is set to be the same as the number of heat exchange tubes in the outlet-side heat exchange tube group.

[0016] Furthermore, the shell is fixedly mounted on the top of the water storage tank.

[0017] Furthermore, the lower part of the shell is embedded in the top of the water storage tank.

[0018] Furthermore, the partition is arranged vertically.

[0019] Compared with the prior art, the utility model has the following effects:

[0020] Through the condenser of the utility model, condensed water can be discharged by gravity without external power. By connecting a water storage tank under the water collecting tank and arranging a drain pipe and a drain valve between the water collecting tank and the water storage tank, the original vacuum environment of the heat exchange system will not be destroyed during the water discharge and pressure relief process. Compared with the existing technology, the working efficiency of the condenser is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] In the figure:

[0023] 1. Vacuum pump; 2. Shell; 3. Heat exchange tube group on the inlet side; 4. Heat exchange tube group on the outlet side; 5. Water collecting tank; 6. Partition; 7. Water storage tank; 8. Flash steam inlet; 9. Steam outlet; 10. First exhaust pipeline; 11. Cooling water inlet; 12. Cooling water outlet; 13. Drain pipe; 14. Drain valve; 15. Second exhaust pipeline; 16. Balance valve; 17. Breaking valve; 18. Drain pipe; 19. Drain valve; 20. Evaporator. DETAILED DESCRIPTION

[0024] Specific implementation method 1: Combination Figure 1This implementation mode is explained by clearly and completely describing the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] It should be noted that the descriptions of the present invention regarding directions such as "left", "right", "left side", "right side", "upper", "lower", "top", "bottom", etc. are all defined based on the relationship between the orientations or positions shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure described must be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] A gravity drainage condenser for a vacuum heat exchange system comprises a vacuum pump 1, a shell 2, a heat exchange tube group, a water collecting box 5, a partition 6 and a water storage tank 7.

[0028] The water collecting tank 5 is located below the heat exchange tube group and is connected to the bottom end of the tube path of the heat exchange tube group. The partition plate 6 is sealed and fixed between the top of the heat exchange tube group and the top of the shell 2, and divides the heat exchange tube group into an inlet side heat exchange tube group 3 and an outlet side heat exchange tube group 4.

[0029] A flash steam inlet 8 and a steam outlet 9 are provided on the upper portion of the shell 2. The flash steam inlet 8 is communicated with the top of the tube side of the inlet side heat exchange tube group 3. The steam outlet 9 is communicated with the top of the tube side of the outlet side heat exchange tube group 4. The vacuum pump 1 is connected to the steam outlet 9 through a first exhaust pipeline 10.

[0030] The lower part of the shell 2 is provided with a cooling water inlet 11, and the upper part is provided with a cooling water outlet 12. The cooling water enters the shell side of the heat exchange tube group.

[0031] The water collecting box 5 is connected to the water storage tank 7 through a drain pipe 13, and a drain valve 14 is provided on the drain pipe 13. The water storage tank 7 is connected to the vacuum pump 1 through a second air extraction pipeline 15, and a balancing valve 16 is provided on the second air extraction pipeline 15. The water storage tank 7 is also connected to a vent valve 17.

[0032] The heat exchange tube group is arranged vertically. The top of the inlet side heat exchange tube group 3 is separated from the top of the outlet side heat exchange tube group 4 by a partition plate 6, and the bottom of the inlet side heat exchange tube group 3 is connected to the bottom of the outlet side heat exchange tube group 4 through a water collecting tank 5.

[0033] The medium and low temperature industrial wastewater enters the evaporator 20, which is a negative pressure environment. The corresponding water vapor saturation temperature is 30-40°C. The temperature of the industrial wastewater is higher than the corresponding saturation temperature under vacuum pressure, and evaporation and boiling occur to produce clean low temperature flash steam. The industrial wastewater after cooling is discharged back to the original system.

[0034] Steam process: the flash steam of the evaporator 20 is transported to the flash steam inlet 8 of the condenser through the steam pipeline, and the flash steam enters the water collecting tank 5 through the tube side of the inlet side heat exchange tube group 3, and the exhaust steam condensed water from the heat exchange condensation is temporarily stored in the water collecting tank 5, and the uncondensed steam flows upward through the tube side of the outlet side heat exchange tube group 4, and is cooled by the cooling water of the shell side to produce exhaust steam condensed water that falls into the water collecting tank 5;

[0035] Cooling water flow: Cooling water enters the outer tube side of the condenser through the cooling water inlet 11 at the bottom, exchanges heat with the flash steam in the tube side, and the heated cooling water is discharged through the cooling water outlet 12 at the top;

[0036] Exhaust steam condensate process: When the equipment is operating normally, the drain valve 14 is always open, and the condensate in the water collecting tank 5 is transported to the water storage tank 7 through the drain pipe 13. After the liquid level in the water storage tank 7 increases to 70% of the height, the drain valve 14 is closed. At this time, the vacuum system is isolated from the environment of the water storage tank 7. The drain valve 19 and the air piercing valve 17 are opened to discharge the condensate in the water storage tank 7, and then the drain valve 19 and the air piercing valve 17 are closed. After opening the balancing valve for 168 minutes, the drain valve 14 is opened again and the operation continues to ensure that the condensate enters the water storage tank 7 and the vacuum pressure of the vacuum system is ensured.

[0037] Through the condenser of the utility model, it is possible to achieve gravity discharge of condensed water without external power, and by connecting the water storage tank 7 below the water collecting tank 5 and arranging a drain pipe 13 and a drain valve 14 between the water collecting tank 5 and the water storage tank 7, it is possible to achieve the process of draining water and relieving pressure without destroying the original vacuum environment of the heat exchange system. Compared with the prior art, the working efficiency of the condenser is effectively improved.

[0038] One end of the drain pipe 13 is connected to the bottom of the water collecting tank 5, and the other end is connected to the upper part of the water storage tank 7. Such a design facilitates the discharge of condensed water in the water collecting tank 5 and prevents the condensed water in the water storage tank 7 from flowing back into the water collecting tank 5.

[0039] The water storage tank 7 is connected with a drain pipe 18, and the drain pipe 18 is provided with a drain valve 19. Such a design facilitates the drainage of the water storage tank 7.

[0040] The drain pipe 18 is connected to the lower part of the water storage tank 7. Such a design further facilitates draining the condensed water in the water storage tank 7.

[0041] The air-breaking valve 17 is connected and arranged on the top of the water storage tank 7. Such a design is used to control the internal pressure of the water storage tank 7 during the water discharge process, thereby ensuring the safety of the water discharge process.

[0042] The second air extraction pipeline 15 is connected to the top of the water storage tank 7. With such a design, when the drain valve 14 is normally open, the second air extraction pipeline 15 is connected to the top of the water storage tank 7, which effectively prevents condensed water from entering the second air extraction pipeline 15.

[0043] The number of heat exchange tubes in the inlet-side heat exchange tube group 3 is set to be the same as the number of heat exchange tubes in the outlet-side heat exchange tube group 4 .

[0044] The housing 2 is fixedly mounted on the top of the water storage tank 7. With such a design, the water storage tank 7 can be used as the base of the housing 2 while realizing its basic water storage function, so that the placement of the condenser is more stable.

[0045] The lower part of the shell 2 is embedded in the top of the water storage tank 7. Such a design reduces the overall structural height of the condenser and enhances the connection stability between the shell 2 and the water storage tank 7.

[0046] The partition 6 is arranged vertically.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gravity drainage condenser for a vacuum heat exchange system, characterized in that: It comprises a vacuum pump (1), a shell (2), a heat exchange tube group, a water collecting box (5), a partition (6) and a water storage tank (7). The water collecting tank (5) is located below the heat exchange tube group and is connected to the bottom end of the tube path of the heat exchange tube group. The partition plate (6) is sealed and fixed between the top end of the heat exchange tube group and the top end of the shell (2), and divides the heat exchange tube group into an inlet side heat exchange tube group (3) and an outlet side heat exchange tube group (4). A flash steam inlet (8) and a steam outlet (9) are provided on the upper portion of the shell (2); the flash steam inlet (8) is communicated with the top end of the tube side of the inlet side heat exchange tube group (3); the steam outlet (9) is communicated with the top end of the tube side of the outlet side heat exchange tube group (4); the vacuum pump (1) is connected to the steam outlet (9) via a first exhaust pipeline (10). The lower part of the shell (2) is provided with a cooling water inlet (11), and the upper part is provided with a cooling water outlet (12), and the cooling water enters the shell side of the heat exchange tube group. The water collecting box (5) and the water storage tank (7) are connected via a drainage pipe (13), and a drainage valve (14) is provided on the drainage pipe (13); the water storage tank (7) and the vacuum pump (1) are connected via a second air extraction pipeline (15), and a balancing valve (16) is provided on the second air extraction pipeline (15); and a venting valve (17) is also connected to the water storage tank (7).

2. The gravity drainage condenser for a vacuum heat exchange system according to claim 1, characterized in that: One end of the drainage pipe (13) is connected to the bottom of the water collecting tank (5), and the other end is connected to the upper part of the water storage tank (7).

3. A gravity drainage condenser for a vacuum heat exchange system according to claim 1 or 2, characterized in that: A water discharge pipe (18) is connected to the water storage tank (7), and a water discharge valve (19) is provided on the water discharge pipe (18).

4. The gravity drainage condenser for a vacuum heat exchange system according to claim 3, characterized in that: The water discharge pipe (18) is connected and arranged at the lower part of the water storage tank (7).

5. The gravity drainage condenser for a vacuum heat exchange system according to claim 1, characterized in that: The air-breaking valve (17) is connected and arranged on the top of the water storage tank (7).

6. A gravity drainage condenser for a vacuum heat exchange system according to claim 1 or 2, characterized in that: The second air extraction pipeline (15) is connected to the top end of the water storage tank (7).

7. The gravity drainage condenser for a vacuum heat exchange system according to claim 3, characterized in that: The number of heat exchange tubes in the inlet-side heat exchange tube group (3) is set to be the same as the number of heat exchange tubes in the outlet-side heat exchange tube group (4).

8. The gravity drainage condenser for a vacuum heat exchange system according to claim 1, characterized in that: The housing (2) is fixedly mounted on the top of the water storage tank (7).

9. A gravity drainage condenser for a vacuum heat exchange system according to claim 1 or 2, characterized in that: The lower part of the shell (2) is embedded in the top of the water storage tank (7).

10. The gravity drainage condenser for a vacuum heat exchange system according to claim 3, characterized in that: The partition (6) is arranged vertically.