Water hammer elimination system for distillation columns

Abstract

The utility model discloses a distillation column water hammer elimination system relates to ink manufacturing production technical field, wherein, including distillation column, water supply pipe, backwater pipe and buffer tank, and distillation column is equipped with water supply and backwater, and water supply pipe is connected with water supply, and the cold water is provided to distillation column, and buffer tank is along up and down direction extension setting, and the inside of buffer tank has buffer chamber, and the bottom of buffer tank is equipped with with buffer chamber intercommunication's first connecting mouth, and the periphery wall of buffer tank is equipped with with buffer chamber intercommunication's second connecting mouth, and second connecting mouth is located above first connecting mouth, and buffer tank is located above backwater, and second connecting mouth is connected with backwater through the connecting pipeline, and backwater pipe is connected with first connecting mouth to send away the hot water of backwater output. The utility model can alleviate water hammer phenomenon, reduce the noise and protect the equipment.

Description

Technical Field

[0001] This utility model relates to the field of ink manufacturing technology, and in particular to a distillation tower water hammer elimination system. Background Technology

[0002] In the production of modern ink products, large quantities of organic solvents are often used. To reduce production costs and environmental pollution, the recycling of waste solvents has become a widespread concern in the industry. Distillation columns, as the core equipment of waste solvent recovery systems, can effectively separate and recover solvents. However, during operation, the design and operation of the cooling system directly affect the safety and production efficiency of the distillation column. During distillation, the vapor fraction produced at the top of the column needs to be cooled by a condenser to condense it into a liquid product or reflux liquid. This process typically relies on a separate industrial cooling water circulation system.

[0003] like Figure 1 As shown, in a traditional cooling water system, cooling water is pumped into the condenser of the distillation tower via a supply pipe. After absorbing heat from the vapor fraction, its own temperature rises significantly, becoming high-temperature hot water. Subsequently, this high-temperature hot water is transported to a cooling tower via a return pipe for cooling, and then recycled back through the supply pipe. This is a mature and widely used technical solution.

[0004] However, existing technologies have revealed certain shortcomings in actual operation. Operators commonly report that severe noise and intense pipe vibration frequently occur in the section of the pipeline from the hot water outlet of the distillation tower condenser to the return water pipe. Analysis revealed that the root cause is not simply "water hammer," but a more complex fluid phase transition instability phenomenon, namely flashing. When hot water from the condenser, at a high temperature and near saturation, enters the return water pipe, if it encounters a local pressure drop caused by the pipe layout (such as elbows and valves), its pressure may momentarily drop below the saturated vapor pressure at that temperature. This causes some of the hot water to vaporize violently, forming a large number of tiny vapor bubbles, creating a two-phase flow. When these vapor bubbles enter the downstream area with higher pressure or lower temperature, they undergo instantaneous condensation and rupture, rapidly shrinking in volume, thus generating powerful microscopic pressure waves in the surrounding liquid. These pressure waves converge, macroscopically manifesting as strong impacts and vibrations; this phenomenon is often referred to in engineering as "steam hammer" or "water hammer."

[0005] This continuous vibration and impact has caused multiple harms:

[0006] 1. Long-term mechanical vibration can cause fatigue damage to critical components such as the flange sealing surfaces and welds connecting the pipeline and the distillation tower, increasing the risk of leakage. Simultaneously, the fasteners of pipeline supports and hangers are prone to loosening, potentially leading to pipeline system instability.

[0007] 2. The loud and irregular noise severely deteriorated the working environment of the workshop and had an adverse effect on the physical and mental health of the operators.

[0008] 3. The presence of vapor-liquid two-phase flow increases the flow resistance in the pipeline, affects the stability of the return water flow, and may consequently affect the heat exchange efficiency of the condenser.

[0009] Therefore, how to effectively suppress or eliminate flash evaporation in the cooling water return pipeline, ensure the safe and stable operation of equipment, and improve the working environment is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0010] This invention aims to solve the technical problems existing in the prior art. To this end, this invention proposes a water hammer elimination system for distillation towers, which can alleviate water hammer phenomena, reduce noise, and protect equipment.

[0011] A distillation column water hammer elimination system according to an embodiment of the present invention includes:

[0012] The distillation tower is equipped with a water supply inlet and a water return outlet;

[0013] A water supply pipe is connected to the water supply port to provide cold water to the distillation column;

[0014] A buffer tank extends vertically and has a buffer cavity inside. The bottom of the buffer tank is provided with a first connection port communicating with the buffer cavity, and the outer peripheral wall of the buffer tank is provided with a second connection port communicating with the buffer cavity. The second connection port is located above the first connection port, and the buffer tank is located above the return water port. The second connection port is connected to the return water port through a connecting pipe.

[0015] A return water pipe is connected to the first connection port to remove the hot water output from the return water port.

[0016] The distillation column water hammer elimination system according to this utility model embodiment has at least the following beneficial effects: With the above structure, the high-temperature hot water flowing out of the distillation column return outlet first enters the buffer tank. The buffer tank provides a sufficiently large volume and cross-sectional area, significantly reducing the fluid velocity and stabilizing the pressure. Even if flash evaporation occurs, the generated steam has ample space for separation, rather than forming high-speed bubbles within a narrow pipe. The steam naturally rises to the upper space of the buffer chamber, while the degassed liquid water flows smoothly into the return pipe from the bottom outlet. Simultaneously, the stable liquid column height (static head) formed within the tank effectively buffers and absorbs pressure fluctuations from downstream pipelines, further suppressing the conditions for flash evaporation and fundamentally eliminating noise and vibration sources.

[0017] In some embodiments, the buffer tank includes a first tank and a second tank that are in communication with each other. The first tank is located above the second tank. The first connection port and the second connection port are formed in the second tank. The peripheral wall of the first tank is provided with a curved heat dissipation wall that extends around the axis of the first tank.

[0018] In some embodiments, the heat dissipation wall is S-shaped.

[0019] In some embodiments, the length of the second tank is greater than the length of the first tank.

[0020] In some embodiments, the top of the buffer tank is provided with a pressure relief valve, which includes a valve body, a valve plug, a valve cover, and a spring. The top of the buffer tank is provided with a flange end cover, which has a threaded hole communicating with the buffer cavity. The valve body is threaded to the threaded hole and has a groove. The bottom of the valve body is provided with a pressure relief port communicating with the groove and the buffer cavity. The valve plug is disposed in the groove, and there is a gap between the valve plug and the peripheral wall of the groove. The peripheral wall of the groove is provided with a spiral groove. The outer walls of the two opposite sides of the valve cover are respectively provided with protrusions, which cooperate with the spiral grooves. There is a gap between the valve cover and the peripheral wall of the groove. The spring is located between the valve plug and the valve cover. Under the elastic force of the spring, the valve plug remains closed to the pressure relief port.

[0021] In some embodiments, the top of the valve cover has a hexagonal inner hole.

[0022] In some embodiments, the top of the valve cover is provided with a first limiting groove, the top of the valve plug is provided with a second limiting groove, the upper end of the spring extends into the first limiting groove, and the lower end of the spring extends into the second limiting groove.

[0023] In some embodiments, the return water pipe is provided with a switch valve to control its on / off state.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0026] Figure 1 This is a schematic diagram of the structure of a distillation column system in the prior art;

[0027] Figure 2 This is a schematic diagram of the structure of the water hammer elimination system of the distillation tower according to some embodiments of the present invention;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a partial structural schematic diagram of the water hammer elimination system of a distillation tower according to some embodiments of the present invention;

[0030] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0031] Figure label:

[0032] Distillation column 100, water supply inlet 110, water return inlet 120;

[0033] Water supply pipe 200;

[0034] 300mm return pipe;

[0035] Buffer tank 400, buffer chamber 410, first connection port 411, second connection port 412, first tank body 420, heat dissipation wall 421, flange end cover 422, second tank body 430;

[0036] Pressure relief valve 500, valve body 510, spiral groove 511, groove 512, pressure relief port 513, valve plug 520, second limiting groove 521, valve cover 530, protrusion 531, hexagonal inner hole 532, first limiting groove 533, spring 540;

[0037] First switching valve 600;

[0038] Second switching valve 700. Detailed Implementation

[0039] Reference Figure 2 As shown, a water hammer elimination system for a distillation tower provided in this embodiment of the present invention includes a distillation tower 100, a water supply pipe 200, a water return pipe 300, and a buffer tank 400.

[0040] Reference Figure 2 As shown, the distillation column 100 is provided with a water supply port 110 and a water return port 120. A water supply pipe 200 is connected to the water supply port 110 to provide cold water to the distillation column 100. A buffer tank 400 extends vertically and has a buffer cavity 410 inside. The bottom of the buffer tank 400 has a first connection port 411 communicating with the buffer cavity 410, and the outer peripheral wall of the buffer tank 400 has a second connection port 412 communicating with the buffer cavity 410. The second connection port 412 is located above the first connection port 411. The buffer tank 400 is located above the water return port 120, and the second connection port 412 is connected to the water return port 120 via a connecting pipe. A water return pipe 300 is connected to the first connection port 411 to remove the hot water output from the water return port 120.

[0041] With the above structure, the high-temperature hot water flowing out of the return water port 120 of the distillation column 100 first enters the buffer tank 400. The buffer tank 400 provides a sufficiently large volume and cross-sectional area, which significantly reduces the fluid velocity and stabilizes the pressure. Even if flash evaporation occurs, the generated steam has ample space for separation, rather than forming high-speed bubbles in a narrow pipe. The steam naturally rises to the upper space of the buffer chamber 410, while the degassed liquid water flows smoothly from the bottom outlet into the return water pipe 300. At the same time, the stable liquid column height (static head) formed in the tank can effectively buffer and absorb pressure fluctuations from the downstream pipeline, further suppressing the conditions for flash evaporation, thereby fundamentally eliminating noise and vibration sources.

[0042] Reference Figure 2 As shown, in some embodiments, the buffer tank 400 includes a first tank body 420 and a second tank body 430 that are interconnected. The first tank body 420 is located above the second tank body 430. A first connection port 411 and a second connection port 412 are formed in the second tank body 430. The peripheral wall of the first tank body 420 is provided with a curved heat dissipation wall 421, which extends around the axis of the first tank body 420. The first tank body 420 is used to temporarily store hot water. The steam from the hot water rises into the second tank body 430 and comes into contact with the heat dissipation wall 421. The heat dissipation wall 421 has a large area, which can quickly cool the steam and condense it into liquid, thereby accelerating the cooling efficiency and preventing excessive steam pressure from causing pipe rupture. In some embodiments, refer to Figure 3 As shown, the heat dissipation wall 421 has an S-shaped cross-section. This design allows the heat dissipation wall 421 to have a larger surface area.

[0043] This can be understood as follows: the buffer tank 400 comprises, from bottom to top, interconnected buffer separation chambers (located within the second tank 430) and heat dissipation condensation chambers (located within the first tank 420). The first connection port 411 and the second connection port 412 are both located on the buffer separation chamber. Spiral or S-shaped heat dissipation fins are integrally formed or welded onto the outer peripheral wall of the heat dissipation condensation chamber to increase the contact area with the surrounding air. With this design, when the steam generated by flash evaporation rises and fills the heat dissipation condensation chamber, the efficient heat dissipation fins can perform natural convection heat exchange with the ambient air, rapidly cooling the steam and condensing it into water, which drips back into the buffer separation chamber below. This avoids excessive steam accumulation in the tank leading to increased pressure, and also pre-cools the return water, reducing the load on the subsequent cooling tower and improving the overall energy efficiency of the cooling system.

[0044] Reference Figure 2 As shown, in some embodiments, the length of the second tank 430 is greater than the length of the first tank 420. This allows for the storage of more hot water while occupying less space.

[0045] Reference Figure 4 and Figure 5 As shown, in some embodiments, a pressure relief valve 500 is provided at the top of the buffer tank 400. The pressure relief valve 500 includes a valve body 510, a valve plug 520, a valve cover 530, and a spring 540. A flange end cover 422 is provided at the top of the buffer tank 400. The flange end cover 422 has a threaded hole communicating with the buffer cavity 410. The valve body 510 is threaded to the threaded hole and has a groove 512. The bottom of the valve body 510 has a pressure relief port 513 communicating with the groove 512 and the buffer cavity 410. The valve plug 520 is disposed in the groove 512. The valve plug 520 and the groove 512 are connected. There is a gap between the peripheral walls of valve plug 520 and valve cover 530. The peripheral wall of groove 512 is provided with a spiral groove 511. The outer walls of valve cover 530 on both sides opposite to each other are provided with protrusions 531. The protrusions 531 cooperate with the spiral grooves 511. There is a gap between valve cover 530 and the peripheral wall of groove 512. Spring 540 is located between valve plug 520 and valve cover 530. Under the elastic force of spring 540, valve plug 520 keeps the pressure relief port 513 closed. When the internal pressure of buffer tank 400 is too high, it will push valve plug 520 open, and steam can be discharged to the outside through the gap between valve plug 520 and groove 512. In this embodiment, pressure relief valve 500 is set to relieve pressure. When the system has abnormal operating conditions (such as hot water temperature too high, return water pipe 300 blockage, etc.), causing the steam pressure in the tank to exceed the preset safety value, pressure relief valve 500 will automatically open to discharge excess steam, preventing physical damage to buffer tank 400 due to overpressure, and playing a final safety protection role.

[0046] Reference Figure 5 As shown, in some embodiments, the top of the valve cover 530 is provided with a hexagonal inner hole 532. The valve cover 530 can be rotated by inserting an Allen wrench into the hexagonal inner hole 532, making the assembly operation more convenient.

[0047] Reference Figure 5 As shown, in some embodiments, the top of the valve cover 530 is provided with a first limiting groove 533, the top of the valve plug 520 is provided with a second limiting groove 521, the upper end of the spring 540 extends into the first limiting groove 533, and the lower end of the spring 540 extends into the second limiting groove 521. This serves to limit the movement of the spring 540 and prevent it from deviating.

[0048] For ease of system maintenance and operation, please refer to Figure 2 As shown, in some embodiments, the return water pipe 300 is provided with a first switch valve 600 for controlling its on / off state, and the supply water pipe 200 is provided with a second switch valve 700 for controlling its on / off state, for cutting off the water flow in case of maintenance or emergency.

[0049] Compared with the prior art, the present invention has the following significant advantages:

[0050] Eliminating vibration and noise: By setting up a buffer tank as a steam-water separator and pressure stabilizer, a stable pressure reduction and phase separation space is provided for high-temperature hot water, which fundamentally solves the "steam hammer" phenomenon caused by flash evaporation and completely eliminates the resulting severe vibration and noise.

[0051] Protect equipment and extend its lifespan: By eliminating vibration sources, fatigue damage to components such as pipe flanges, welds, and supports is effectively avoided, significantly extending the service life of the entire cooling pipeline system and related equipment, and reducing maintenance costs and safety risks.

[0052] Improved system energy efficiency: The integrated heat dissipation and condensation chamber structure utilizes natural air cooling to condense and recover the separated steam, which not only saves water resources but also effectively pre-cools the return water, reducing the operating load of the cooling tower and achieving energy-saving effects.

[0053] Simple structure and easy to implement: This device has a compact structure and can be directly installed as a standardized module on the existing distillation tower cooling circuit. The amount of modification work is small, the cost is low, and it is easy to promote and apply.

[0054] High safety: The equipped pressure relief valve provides reliable overpressure protection for the system, ensuring safe operation under extreme conditions.

[0055] Examples of the embodiments described above are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described above with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0056] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0058] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0059] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A water hammer elimination system for a distillation column, characterized in that, include: The distillation tower is equipped with a water supply inlet and a water return outlet; A water supply pipe is connected to the water supply port to provide cold water to the distillation column; A buffer tank extends vertically and has a buffer cavity inside. The bottom of the buffer tank is provided with a first connection port communicating with the buffer cavity, and the outer peripheral wall of the buffer tank is provided with a second connection port communicating with the buffer cavity. The second connection port is located above the first connection port, and the buffer tank is located above the return water port. The second connection port is connected to the return water port through a connecting pipe. A return water pipe is connected to the first connection port to remove the hot water output from the return water port.

2. The water hammer elimination system for distillation columns according to claim 1, characterized in that, The buffer tank includes a first tank and a second tank that are interconnected. The first tank is located above the second tank. The first connection port and the second connection port are formed in the second tank. The peripheral wall of the first tank is provided with a curved heat dissipation wall that extends around the axis of the first tank.

3. The water hammer elimination system for distillation columns according to claim 2, characterized in that, The heat dissipation wall is S-shaped.

4. The water hammer elimination system for distillation columns according to claim 2, characterized in that, The length of the second tank is greater than the length of the first tank.

5. The water hammer elimination system for distillation columns according to claim 1, characterized in that, The top of the buffer tank is equipped with a pressure relief valve, which includes a valve body, a valve plug, a valve cover, and a spring. The top of the buffer tank is equipped with a flange end cover, which has a threaded hole communicating with the buffer cavity. The valve body is threaded into the threaded hole and has a groove. The bottom of the valve body is equipped with a pressure relief port communicating with the groove and the buffer cavity. The valve plug is located in the groove, and there is a gap between the valve plug and the peripheral wall of the groove. The peripheral wall of the groove is equipped with a spiral groove. The outer walls of the valve cover on both sides opposite to the valve are respectively equipped with protrusions, which cooperate with the spiral grooves. There is a gap between the valve cover and the peripheral wall of the groove. The spring is located between the valve plug and the valve cover. Under the elastic force of the spring, the valve plug keeps the pressure relief port closed.

6. The water hammer elimination system for distillation columns according to claim 5, characterized in that, The valve cover has a hexagonal inner hole at its top.

7. The water hammer elimination system for distillation columns according to claim 5, characterized in that, The valve cover has a first limiting groove at its top, the valve plug has a second limiting groove at its top, the upper end of the spring extends into the first limiting groove, and the lower end of the spring extends into the second limiting groove.

8. The water hammer elimination system for distillation columns according to claim 1, characterized in that, The return water pipe is equipped with a switch valve to control its on / off state.

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