A negative pressure condensing device

Abstract

The utility model relates to negative pressure condenser technical field especially relates to a negative pressure condensing device, the lower part of the inside casing is provided with sump, and the upper portion of sump is provided with filler assembly, and the upper portion of filler assembly is provided with heat exchange coil, and sump is connected with circulating pump, and sump, filler assembly and heat exchange coil all are arranged in the inside casing, and the inside casing is also provided with negative pressure chamber, and negative pressure chamber is located at one side of filler assembly, and the top of casing is provided with fan, the fan is located at the top of negative pressure chamber, and the upper portion of heat exchange coil is provided with liquid equalizing defoaming mechanism, liquid equalizing defoaming mechanism includes box, and the inside box is provided with liquid equalizing assembly, and the inside cavity of box is connected with circulating pump outlet through pipeline, and the box is communicated with heat exchange coil, and the box is cooperatively arranged on the top of heat exchange coil. Through the utilization of box and the liquid equalizing assembly in the inside, cooperate circulating pump, can make water evenly distribute on the surface of heat exchange coil, and the box can play the blocking action to the spray process produced fly ash.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure condenser technology, and in particular to a negative pressure condensation device. Background Technology

[0002] Condensing equipment, as a key device for heat exchange in industrial production, is widely used in refrigeration, metallurgy, chemical industry, and many other fields. Among them, evaporative condensers, which integrate the functions of traditional condensers and cooling towers, use a mixture of water and air as the cooling medium. The evaporation of cooling water removes the heat released by refrigerant condensation, offering advantages such as compact structure, low energy consumption, and stable operation, making them one of the mainstream devices. A typical structure usually includes a fan for forced ventilation, a spray assembly for spraying cooling water, condensing coils for heat exchange, a packing layer to promote gas-liquid heat exchange, and a water circulation system. The heat transfer process is completed through the coordinated work of these components.

[0003] To improve the heat exchange efficiency of evaporative condensers, existing technologies primarily focus on modifying the condenser tube structure. For example, using spiral condenser tubes, the irregular channels formed by the spiral lines on the outer edge of the tubes enhance airflow turbulence. Simultaneously, optimizing the tube surface curvature and cross-sectional shape improves water film coverage and heat transfer driving force, thereby enhancing the heat exchange effect. Furthermore, by rationally designing the water circulation path and combining it with the effect of the heat exchange packing layer, the cooling water temperature can be further reduced, ensuring the continuous and efficient operation of the equipment.

[0004] However, existing evaporative condensers still have shortcomings in their spray system design. Traditional equipment often uses spray nozzles to directly spray cooling water onto the condenser coils. Due to the unevenness of the water jet, this can easily lead to insufficient water film coverage on the condenser coil surface, with some areas having too much or too little water, affecting the stability of heat exchange efficiency. Furthermore, the spraying process easily generates a large amount of droplets, which may also affect the internal pressure balance and operating environment of the equipment, requiring structural optimization to address these issues. Moreover, the gas extracted from the negative pressure chamber in existing technologies contains a large amount of water vapor, resulting in water waste. Utility Model Content

[0005] To address the current problem of spraying cooling water directly onto the condenser coil from the spray nozzles, which can lead to uneven water flow, insufficient water film coverage on the condenser coil surface, and excessive or insufficient water in some areas, thus affecting the stability of heat exchange efficiency; at the same time, the spraying process can easily generate a large amount of droplets, which may also affect the internal pressure balance and operating environment of the equipment. This utility model provides a negative pressure condensation device.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] A negative pressure condensing device includes a casing, a water collection chamber in the lower part of the casing, a packing assembly above the water collection chamber, a heat exchange coil above the packing assembly, the water collection chamber being connected to a circulating pump, the water collection chamber, the packing assembly, and the heat exchange coil all being housed within the casing, a negative pressure chamber located to one side of the packing assembly, a fan at the top of the casing, the fan being located above the negative pressure chamber, and a liquid equalization and defoaming mechanism above the heat exchange coil; the liquid equalization and defoaming mechanism includes a housing; a liquid equalization assembly is housed within the housing; the inner cavity of the housing is connected to the outlet of the circulating pump via a pipeline, and the housing is connected to the heat exchange coil; the housing is fitted above the heat exchange coil. This negative pressure condenser unit uses a liquid equalization and defoaming mechanism installed above the heat exchange coils. Utilizing the housing and internal liquid equalization components, along with a circulating pump, water from the water accumulation chamber is transported to the housing, ensuring uniform water distribution on the heat exchange coil surface. This effectively solves the problems of uneven water flow, insufficient water film coverage on the condenser coil surface, or excessive local water volume caused by direct spraying from the spray nozzles in existing technologies. Simultaneously, the housing blocks the droplets generated during spraying, reducing water waste and ensuring the stability of heat exchange efficiency, while improving the internal pressure balance and operating environment of the equipment.

[0008] Preferably, a liquid inlet is provided on one side of the box body; the bottom surface of the box body slopes downward from the side near the liquid inlet to the opposite side at an angle of 3°~5°; and several drainage holes are evenly distributed on the bottom surface of the box body. The liquid inlet on one side of the box body, in conjunction with a circulating pump, delivers cooling water. The downward slope of the bottom surface from the side near the liquid inlet to the opposite side allows gravity to guide the water flow to spread evenly. Then, the water is sprayed onto the heat exchange coil through the evenly distributed drainage holes on the bottom surface, which can effectively solve the problems of insufficient water film coverage on the surface of the condenser coil, excessive or insufficient water in some areas caused by uneven spraying from traditional spray nozzles.

[0009] Preferably, the liquid equalization assembly includes two symmetrically arranged liquid equalization units within the box; each liquid equalization unit includes several parallel liquid equalization plates; the liquid equalization plates include a first liquid equalization plate closest to the liquid inlet, several intermediate liquid equalization plates, and a last liquid equalization plate farthest from the liquid inlet, all of which are arranged sequentially at intervals; the length of the liquid equalization plates gradually increases from the first liquid equalization plate to the last liquid equalization plate; the liquid equalization plates are vertically arranged on the bottom surface of the box. The two symmetrical liquid equalization units in the liquid equalization assembly, through several liquid equalization plates of gradually increasing length and spaced apart, can form a step-by-step diversion and guiding effect on the cooling water entering the box from the liquid inlet, avoiding concentrated water flow impacting one side of the box, allowing the water flow to be evenly distributed within the box before being sprayed onto the heat exchange coil through the drain holes. Compared to the existing technology that only sprays directly through spray nozzles, this method more effectively solves the problem of uneven water film coverage on the surface of the condenser coil, while reducing droplets caused by water flow turbulence, reducing water waste, and improving the stability of heat exchange efficiency.

[0010] Preferably, the liquid equalization assembly further includes a diversion plate; one end of the diversion plate is fixedly connected to the end of the final liquid distribution plate near the middle of the box; the other end of the diversion plate is located near the liquid inlet. The diversion plate added to the liquid equalization assembly, with one end connected to the end of the final liquid distribution plate near the middle of the box and the other end extending to the vicinity of the liquid inlet, can guide the water at the liquid inlet of the box to the final liquid distribution plate, avoiding the problem of insufficient water volume at the far end and concentrated water volume at the near end caused by the size of the box or the inertia of the water flow, further optimizing the uniformity of water distribution in the box, making the water film coverage on the surface of the heat exchange coil more sufficient, and reducing the impact of local uneven water volume on heat exchange efficiency.

[0011] Preferably, two baffles are provided between the diversion plate and the liquid inlet, and the two baffles are symmetrically arranged with the axis of the liquid inlet as the axis of symmetry; both the baffles and the liquid distribution plate are provided with several through holes. The two baffles symmetrically arranged between the diversion plate and the liquid inlet, together with the several through holes on the baffles and the liquid distribution plate, can form an initial buffer and diversion for the water flow entering from the liquid inlet, reducing the turbulence caused by the direct impact of the water flow, and allowing the water flow to enter the liquid distribution unit more smoothly; at the same time, the through holes can further refine the water flow, and combined with the diversion effect of the liquid distribution plate and the guiding effect of the diversion plate, significantly improve the uniformity of the water flow distribution in the box, ensure more sufficient water film coverage on the surface of the heat exchange coil, and effectively solve the problem of unstable heat exchange efficiency caused by uneven spraying in the prior art; in addition, the impact of the buffered water flow is reduced, and together with the blocking effect of the baffles, it can reduce the droplets generated during the spraying process and reduce water waste.

[0012] Preferably, a gas-liquid separator is installed within the negative pressure chamber in conjunction with the packing assembly. This gas-liquid separator within the negative pressure chamber enables efficient gas-liquid separation of the airflow after passing through the packing assembly, removing a large amount of water vapor from the airflow and preventing it from being extracted by the fan, thus avoiding water waste. This effectively reduces water resource loss compared to the existing technology where direct-drive exhaust fans directly extract hot, humid steam, leading to water vapor loss.

[0013] Preferably, the gas-liquid separator includes a shell; several baffles are disposed inside the shell; an outlet is provided on the top surface of the shell away from the packing assembly; and an inlet is provided on the shell near the packing assembly. The shell of the gas-liquid separator, combined with the internal baffles and the design of the inlet near the packing assembly and the outlet away from the packing assembly, allows the humid airflow entering the shell from the packing assembly to change its flow direction multiple times under the obstruction of the baffles. This utilizes inertia to separate the water vapor from the airflow. Compared to the existing technology that only uses a direct-drive exhaust fan to remove humid steam, this significantly improves the gas-liquid separation efficiency, reduces the amount of water vapor discharged with the airflow, and reduces water waste. Simultaneously, the separated gas is discharged through the outlet, avoiding the impact of water vapor on the fan and other components of the equipment, helping to maintain a stable operating environment inside the equipment and ensuring the efficient operation of the negative pressure condensation device.

[0014] Preferably, the bottom surface of the shell slopes upwards from the side near the packing assembly to the side farther away, with an inclination angle of 20°~30°. This upward slope of the bottom surface of the gas-liquid separator shell utilizes gravity to guide the liquid water separated by the baffles to the side closer to the packing assembly. This facilitates the return of the liquid water to the lower water accumulation chamber for recirculation, preventing water accumulation inside the shell. Compared to existing technologies that do not mention similar sloped bottom designs, this effectively reduces water waste caused by stagnation. It also ensures a dry gas flow environment inside the gas-liquid separator, improving separation efficiency and ensuring more efficient operation of the water circulation system in the negative pressure condenser. Combined with the existing technology's approach of using a circulating water pump to circulate cooling water, this further enhances the energy-saving effect of the equipment.

[0015] As can be seen from the above technical solutions, the advantages of this utility model include: This negative pressure condensing device, by setting a liquid equalization and defoaming mechanism above the heat exchange coil, utilizes the box body and the internal liquid equalization components, in conjunction with a circulating pump, to transport water from the water accumulation chamber to the box body, enabling water to be evenly distributed on the surface of the heat exchange coil. This effectively solves the problems of uneven water flow, insufficient water film coverage on the surface of the condensing coil, or excessive local water volume caused by direct spraying from the spray nozzle in the prior art. At the same time, the box body can block the droplets generated during the spraying process, reducing water waste, thereby ensuring the stability of heat exchange efficiency and improving the internal air pressure balance and operating environment of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a cross-sectional view of the box body of this utility model.

[0021] Figure 5 This is a schematic diagram of the gas-liquid separator of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1-casing, 2-water collection chamber, 3-packing assembly, 4-heat exchange coil, 5-circulating pump, 6-negative pressure chamber, 7-fan, 8-box, 9-pipeline, 10-gas-liquid separator;

[0023] 801-Liquid inlet, 802-Leakage hole, 803-Middle liquid distribution plate, 804-Drain plate, 805-Baffle, 806-Through hole, 807-End liquid distribution plate, 808-First liquid distribution plate; 1001-Shell, 1002-Baffle plate, 1003-Air outlet, 1004-Air inlet. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0025] like Figure 1 and Figure 2 As shown, a negative pressure condensing device includes a housing 1, a water collection chamber 2 in the lower part of the housing 1, a packing assembly 3 above the water collection chamber 2, and a heat exchange coil 4 above the packing assembly 3. The water collection chamber 2 is connected to a circulating pump 5. The water collection chamber 2, the packing assembly 3, and the heat exchange coil 4 are all located inside the housing. A negative pressure chamber 6 is also provided inside the housing, located on one side of the packing assembly 3. A fan 7 is provided at the top of the housing. The fan 7 is located above the negative pressure chamber 6. A liquid equalization and defoaming mechanism is provided above the heat exchange coil 4. The liquid equalization and defoaming mechanism includes a box body 8. A liquid equalization assembly is provided inside the box body 8. The inner cavity of the box body 8 is connected to the outlet of the circulating pump 5 through a pipe 9. The box body 8 is positioned above the heat exchange coil 4.

[0026] This negative pressure condensing device uses a liquid equalization and defoaming mechanism installed above the heat exchange coil 4. Utilizing the housing 8 and its internal liquid equalization components, along with the circulating pump 5, water from the water accumulation chamber 2 is transported to the housing 8, ensuring uniform water distribution on the surface of the heat exchange coil 4. This effectively solves the problems of uneven water flow, insufficient water film coverage on the condensing coil surface, or excessive local water volume caused by direct spraying from the spray nozzles in existing technologies. At the same time, the housing 8 can block the droplets generated during the spraying process, reducing water waste and thus ensuring the stability of heat exchange efficiency, improving the internal pressure balance and operating environment of the equipment.

[0027] like Figure 3 and Figure 4As shown, a liquid inlet 801 is provided on one side of the box body 8; the bottom surface of the box body 8 slopes downward from the side near the liquid inlet 801 to the opposite side at an angle of 3°, so the water flow is relatively stable along the bottom surface of the box body 8 under the action of gravity. In other alternative embodiments, the angle of inclination is 5°, and the water flow speed is faster; a plurality of leakage holes 802 are uniformly provided on the bottom surface of the box body 8. The liquid equalization component includes two symmetrically arranged liquid equalization units inside the box body 8; each liquid equalization unit includes a plurality of parallel liquid equalization plates, and all the liquid equalization plates are arranged sequentially at intervals; the plurality of liquid equalization plates include a first liquid equalization plate 808 closest to the liquid inlet 801, a plurality of intermediate liquid equalization plates 803 in the middle, and a last liquid equalization plate 807 farthest from the liquid inlet; the length of the liquid equalization plates gradually increases from the first liquid equalization plate 808 to the last liquid equalization plate 807. The liquid equalization assembly also includes a diversion plate 804; one end of the diversion plate 804 is fixedly connected to the end of the final liquid distribution plate 807 near the middle of the box body 8; the other end of the diversion plate 804 is located near the liquid inlet 801. Two baffles 805 are provided between the diversion plate 804 and the liquid inlet 801, and the two baffles 805 are symmetrically arranged about the axis of the liquid inlet 801; both the baffles 805 and the liquid distribution plate are provided with several through holes 806.

[0028] The liquid inlet 801 on one side of the housing 8 works with the circulating pump 5 to deliver cooling water. The bottom surface, sloping downwards from the side near the liquid inlet 801 to the opposite side, guides the water flow evenly with gravity. The water is then sprayed onto the heat exchange coil 4 through evenly distributed drain holes 802 on the bottom surface. This effectively solves the problems of insufficient water film coverage on the condenser coil surface and localized excessive or insufficient water volume caused by uneven spraying from traditional spray nozzles. Two symmetrical distribution units in the liquid equalization assembly, through several gradually increasing and spaced distribution plates, can progressively divide and guide the cooling water entering the housing 8 from the liquid inlet 801. This prevents the water flow from concentrating and impacting one side of the housing 8, ensuring even distribution within the housing 8 before spraying onto the heat exchange coil 4 through the drain holes 802. Compared to the existing technology that relies solely on direct spraying from spray nozzles, this method more effectively solves the problem of uneven water film coverage on the condenser coil surface, while also reducing droplets caused by turbulent water flow, minimizing water waste, and improving the stability of heat exchange efficiency. The addition of a diversion plate 804 to the liquid equalization assembly is a diversion plate 804. One end of the diversion plate 804 is fixedly connected to the end of the final liquid distribution plate 807 near the middle of the box body 8, and the other end extends to the vicinity of the liquid inlet 801. This can guide the water at the liquid inlet 801 of the box body 8 to the final liquid distribution plate 807, avoiding the problem of insufficient water volume at the far end and concentrated water volume at the near end caused by the size of the box body 8 or the inertia of the water flow. This further optimizes the uniformity of water flow distribution in the box body 8, making the water film coverage on the surface of the heat exchange coil 4 more sufficient, and reducing the impact of local water unevenness on heat exchange efficiency. Two baffles 805 symmetrically arranged between the diversion plate 804 and the liquid inlet 801, together with the baffles 805 and several through holes 806 on the liquid distribution plate, can initially buffer and divert the water flow entering from the liquid inlet 801, reducing the turbulence caused by the direct impact of the water flow and allowing the water flow to enter the liquid distribution unit more smoothly. At the same time, the through holes 806 can further refine the water flow. Combined with the diversion effect of the liquid distribution plate and the guiding effect of the diversion plate 804, the uniformity of the water flow distribution in the box 8 is significantly improved, ensuring that the water film on the surface of the heat exchange coil 4 is more fully covered, effectively solving the problem of unstable heat exchange efficiency caused by uneven spraying in the prior art. In addition, the impact of the buffered water flow is weakened, and with the blocking effect of the baffles 805, the droplets generated during the spraying process can be reduced, reducing water waste.

[0029] like Figure 5 As shown, a gas-liquid separator 10 is installed inside the negative pressure chamber 6 in conjunction with the packing assembly 3. The gas-liquid separator 10 includes a housing 1001; several baffles 1002 are installed inside the housing 1001; an air outlet 1003 is opened on the top surface of the housing 1001 away from the packing assembly 3; and an air inlet 1004 is opened on the side of the housing 1001 near the packing assembly 3. The bottom surface of the housing 1001 slopes upward from the side near the packing assembly 3 to the side farthest away at an angle of 20°, resulting in a faster water flow velocity along the bottom surface of the housing 1001 and a larger internal space. In other alternative embodiments, the slope angle is 30°, resulting in an even faster water flow velocity, but a smaller internal space within the housing 1001.

[0030] A gas-liquid separator 10 is installed in the negative pressure chamber 6 in conjunction with the packing assembly 3. This separator can efficiently separate the gas and liquid in the airflow after passing through the packing assembly 3, thus separating out a large amount of water vapor contained in the airflow and preventing it from being extracted by the fan 7 and wasting water. Compared with the existing technology where the direct-drive exhaust fan 7 directly extracts and discharges hot and humid steam, resulting in water vapor loss, this separator effectively reduces water resource consumption. The gas-liquid separator 10's housing 1001, along with several internal baffles 1002, and an inlet 1004 near the packing assembly 3 and an outlet 1003 away from the packing assembly 3, allows the humid airflow entering the housing 1001 from the packing assembly 3 to change its flow direction multiple times under the obstruction of the baffles 1002. This utilizes inertia to separate the water vapor from the airflow. Compared to the existing technology that only uses a direct-drive exhaust fan 7 to extract humid steam, this significantly improves gas-liquid separation efficiency, reduces the amount of water vapor discharged with the airflow, and lowers water waste. Simultaneously, the separated gas is discharged through the outlet 1003, preventing water vapor from affecting the fan 7 and other components of the equipment. This helps maintain a stable operating environment inside the equipment and ensures the efficient operation of the negative pressure condensation device. The bottom surface of the gas-liquid separator 10 housing 1001 is inclined upwards from the side closer to the packing assembly 3 to the side farther away from the packing assembly 3. This design utilizes gravity to guide the liquid water separated by the baffle 1002 to the side closer to the packing assembly 3, facilitating the return of the liquid water to the lower water accumulation chamber 2 for re-entry into the circulation. This prevents water accumulation inside the housing 1001. Compared to existing technologies that do not mention similar inclined bottom surface designs, this design effectively reduces water waste caused by stagnation. It also ensures a dry gas flow environment inside the gas-liquid separator 10, improving separation efficiency and ensuring more efficient operation of the water circulation system of the negative pressure condenser. Combined with the existing technology's approach of using a circulating water pump to achieve cooling water circulation, this design further enhances the energy-saving effect of the equipment.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A negative pressure condensing device, comprising a casing (1), a water collection chamber (2) disposed in the lower part of the casing (1), a packing assembly (3) disposed above the water collection chamber (2), a heat exchange coil (4) disposed above the packing assembly (3), the water collection chamber (2) being connected to a circulating pump (5), the water collection chamber (2), the packing assembly (3) and the heat exchange coil (4) being disposed within the casing, a negative pressure chamber (6) also being disposed within the casing, the negative pressure chamber (6) being located on one side of the packing assembly (3), and a fan (7) disposed at the top of the casing; the fan (7) being located above the negative pressure chamber (6), characterized in that, A liquid equalization and defoaming mechanism is provided above the heat exchange coil (4); the liquid equalization and defoaming mechanism includes a box (8); a liquid equalization component is provided inside the box (8); the inner cavity of the box (8) is connected to the outlet of the circulating pump (5) through a pipeline (9); the box (8) is fitted above the heat exchange coil (4).

2. The negative pressure condensation device according to claim 1, characterized in that, The box body (8) has an inlet (801) on one side; the bottom surface of the box body (8) is inclined upward from the side near the inlet (801) to the opposite side at an angle of 3°~5°; the bottom surface of the box body (8) is evenly provided with several leakage holes (802).

3. The negative pressure condensation device according to claim 2, characterized in that, The liquid equalization assembly includes two liquid equalization units symmetrically arranged inside the box (8); each liquid equalization unit includes several parallel liquid equalization plates, and all liquid equalization plates are arranged in sequence at intervals; the several liquid equalization plates include the first liquid equalization plate (808) closest to the liquid inlet (801), several middle liquid equalization plates (803) in the middle, and the last liquid equalization plate (807) farthest from the liquid inlet; the length of the liquid equalization plates gradually increases from the first liquid equalization plate (808) to the last liquid equalization plate (807).

4. The negative pressure condensation device according to claim 3, characterized in that, The liquid equalization assembly also includes a diversion plate (804); one end of the diversion plate (804) is fixedly connected to the end of the final liquid distribution plate (807) near the middle of the box body (8); the other end of the diversion plate (804) is located near the liquid inlet (801).

5. The negative pressure condensation device according to claim 4, characterized in that, Two baffles (805) are provided between the diversion plate (804) and the liquid inlet (801). The two baffles (805) are symmetrically arranged with the axis of the liquid inlet (801) as the axis of symmetry. Several through holes (806) are provided on both the baffles (805) and the liquid separator.

6. The negative pressure condensation device according to claim 1 or 5, characterized in that, A gas-liquid separator (10) is installed inside the negative pressure chamber (6) in conjunction with the packing assembly (3).

7. The negative pressure condensation device according to claim 6, characterized in that, The gas-liquid separator (10) includes a housing (1001); several baffles (1002) are provided inside the housing (1001); an outlet (1003) is provided on the top surface of the housing (1001) away from the packing assembly (3); and an inlet (1004) is provided on the side of the housing (1001) close to the packing assembly (3).

8. The negative pressure condensation device according to claim 7, characterized in that, The bottom surface of the shell (1001) is inclined upward from the side near the packing assembly (3) to the side far away, with an inclination angle of 20°~30°.

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