Multistage evaporative condenser and condensing unit thereof

Abstract

The application discloses a kind of multistage evaporative condenser and condensing unit thereof, belong to condenser technical field, including condensing tube, condensing tube is provided with condenser control box and compressor, condensing tube rear is provided with steam circulation mechanism, condensing tube end is provided with shunt baffle.The application can make low-temperature water flow and high-temperature steam flow reversely by the setting of upper through baffle, lower through baffle and double through baffle, follows scientific and effective heat exchange principle, so that low-temperature side entrance meets low-temperature side steam, high-temperature side outlet corresponds high-temperature side steam entrance, ensures reasonable temperature difference and sufficient heat exchange in whole process, and the setting of suction assembly and suction seat can use centrifugal impeller to deposit the tiny impurities in water flow around bottom by centrifugal force, then use negative pressure suction system below elastic membrane ring to automatically discharge the collected high-concentration impurity water flow from system, which inhibits the formation of scale from the root.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of condensers, in particular to a multi-stage evaporative condenser and a condensing unit thereof. BACKGROUND

[0002] The condenser is a key component in refrigeration and heat systems, and its core function is like a heat exchanger. Its basic task is to release the heat of high-temperature and high-pressure gaseous refrigerant discharged by the compressor to the outside environment.

[0003] During the long-term use of the coil in the condenser, the minerals or impurities dissolved in the water in the coil are continuously accumulated, which gradually forms scale, affecting the normal use of the condenser, so that the condenser needs to be cleaned regularly, increasing the maintenance cost of the condenser, and the coil in the condenser is more susceptible to stress deformation at the bend due to the influence of the internal and external temperature difference, affecting the service life of the coil, so a multi-stage evaporative condenser and a condensing unit thereof are proposed. SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art and propose a multi-stage evaporative condenser and a condensing unit thereof.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A multi-stage evaporative condenser, comprising a condensing pipe, a condenser control box and a compressor are arranged on the condensing pipe, a steam circulation mechanism is arranged behind the condensing pipe, a shunt partition is arranged in the end of the condensing pipe, and a plurality of U-shaped heat exchange coils for heat exchange of water flow are arranged in the condensing pipe.

[0007] A condensing unit, comprising two transition baffle layers fixed to the front and rear outer side walls of the U-shaped heat exchange coil, a partition assembly and a plurality of double-pass partitions are arranged between the two transition baffle layers from the bend to the pipe opening of the U-shaped heat exchange coil, the partition assembly is composed of two upper-pass partitions and a single lower-pass partition, the lower-pass partition is located between the two upper-pass partitions, a pressure reduction assembly is arranged on the upper-pass partition in the direction of the bend of the U-shaped heat exchange coil, a pressure relief baffle is arranged between the plurality of double-pass partitions, and a plurality of pressure relief assemblies are arranged on the pressure relief baffle.

[0008] A through hole with its opening downward is formed in the lower pipe between the lower-pass partition and the upper-pass partition close to the pipe opening of the U-shaped heat exchange coil, a suction seat is connected to the outer side wall of the through hole through a sealing assembly, a power impeller is connected to the suction seat through a rotating shaft, a centrifugal impeller is fixed to the top of the rotating shaft, a suction assembly is arranged in the suction seat, and a negative pressure suction tank is communicated with the suction seat through two right-angle pipes, and a negative pressure assembly is arranged in the negative pressure suction tank.

[0009] Preferably, the inner wall of the condensing pipe is fixedly connected with the transition baffle layer at both ends, respectively, the transition baffle layer is composed of two heat insulation plates, and heat insulation cotton is filled between the two heat insulation plates; the U-shaped heat exchange coil is fixedly connected with the inner wall of the condensing pipe through a plurality of double-through partitions and partition assemblies; and mounting seats are fixedly connected to both ends of the condensing pipe.

[0010] Preferably, the pressure relief assembly comprises a pressure relief arc plate slidingly arranged on the top of the upper through partition, the pressure relief arc plate is slidingly connected with a sliding rod, the sliding rod is fixedly connected with the side wall of the upper through partition through a right-angle plate, and a return spring is sleeved on the outer side wall of the sliding rod.

[0011] Preferably, the pressure relief assembly comprises a pressure relief cone, the pressure relief baffle is located between the upper and lower pipelines of the U-shaped heat exchange coil, and the pressure relief baffle is fixedly connected with a pressure relief mesh plate through the pressure relief hole.

[0012] Preferably, the pressure relief mesh plate is fixedly connected with the wide-end of the pressure relief cone, a blocking rubber ball is fixedly connected to the bottom end of the pressure relief mesh plate through a return telescopic rod, and the diameter of the blocking rubber ball is greater than the inner diameter of the narrow-end of the pressure relief cone.

[0013] Preferably, the sealing assembly comprises a sealing frame fixed to the outer wall of the U-shaped heat exchange coil, a separation pipe is fixedly connected to the bottom of the sealing frame, the separation pipe and the U-shaped heat exchange coil are in communication with each other, the bottom end of the separation pipe is fixedly connected with a suction seat, and the suction seat is rotationally connected with a power impeller and a centrifugal impeller through a rotating shaft, respectively.

[0014] Preferably, the suction assembly comprises a plurality of suction telescopic rods arranged in an annular array, an suction chamber is formed in the suction seat, an elastic membrane ring is fixedly connected to the inner end face of the suction chamber through the suction telescopic rod, and the suction chamber is in communication with a negative pressure suction box through a right-angle pipe.

[0015] Preferably, the negative pressure assembly comprises a negative pressure plate slidingly arranged on the inner wall of the negative pressure suction box, a hydraulic telescopic rod and a hydraulic push rod are in communication with each other through a mutual communication chamber at the inner end face of the negative pressure suction box, an expansion hopper is fixedly connected to the piston rod end of the hydraulic telescopic rod, the hydraulic push rod is fixedly connected with the bottom end of the negative pressure plate, and a drainage pipe is in communication with a drainage channel at the bottom of the negative pressure suction box.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] 1. The low-temperature water flow and high-temperature steam flow in opposite directions through the upper through partition, the lower through partition and the double through partition, which follows the scientific and effective heat exchange principle, so that the low-temperature side inlet meets the low-temperature side steam, and the high-temperature side outlet corresponds to the high-temperature side steam inlet, ensuring reasonable temperature difference and sufficient heat exchange throughout the process. The special partition guides the steam flow path, so that the temperature naturally forms a gradient when flowing through the U-shaped heat exchange coil.

[0018] 2. The pressure reducing assembly and pressure relief assembly can be used as an automatic pressure regulating valve, which automatically opens when the steam pressure is too high, and shunts a part of the steam to the key area (such as the elbow and the outlet pipeline) for auxiliary heating, which not only ensures the uniformity of heating, but also buffers and protects the system high pressure.

[0019] 3. The suction assembly and suction seat can use the inherent steam flow driving power impeller inside the condenser to drive the centrifugal impeller to deposit the small impurities in the water flow around the bottom by centrifugal force, and then use the negative pressure suction system below the elastic membrane ring to automatically discharge the high-concentration impurity water flow collected from the system, thereby significantly reducing maintenance cost and frequency, and ensuring long-term efficient operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A perspective view of a multi-stage evaporative condenser and a condensing unit thereof according to the present application is shown;

[0021] Figure 2 An overall assembly view of a multi-stage evaporative condenser and a condensing unit thereof according to the present application is shown;

[0022] Figure 3 A perspective view of a multi-stage evaporative condenser and a condensing unit thereof according to the present application is shown; Figure 2 An enlarged view of position A in FIG. 1 is shown;

[0023] Figure 4 A perspective view of a multi-stage evaporative condenser and a condensing unit thereof according to the present application is shown; An enlarged view of position B in FIG. 1 is shown;

[0024] Figure 5 A perspective view of a multi-stage evaporative condenser and a condensing unit thereof according to the present application is shown; Figure 4 An enlarged view of position B in FIG. 1 is shown;

[0025] Figure 6 A perspective view of a multi-stage evaporative condenser and a condensing unit thereof according to the present application is shown;

[0026] Figure 7 A perspective view of a multi-stage evaporative condenser and a condensing unit thereof according to the present application is shown; An enlarged view of position B in FIG. 1 is shown;

[0027] Figure 8A multi-stage evaporative condenser and a sealing frame position structure diagram in a condensing unit thereof are provided in the present application;

[0028] Figure 9 An assembly diagram of an attraction seat in a multi-stage evaporative condenser and a condensing unit thereof are provided in the present application;

[0029] Figure 10 A power impeller and centrifugal impeller connection structure diagram in a multi-stage evaporative condenser and a condensing unit thereof are provided in the present application;

[0030] Figure 11 A sectional view of an attraction seat in a multi-stage evaporative condenser and a condensing unit thereof are provided in the present application;

[0031] Figure 12 A negative pressure assembly structure diagram in a multi-stage evaporative condenser and a condensing unit thereof are provided in the present application.

[0032] In the figure: 1, condensing pipe; 2, mounting seat; 3, condenser control box; 4, compressor; 5, U-shaped heat exchange coil; 6, shunt baffle; 7, transition baffle layer; 8, upper through baffle; 9, lower through baffle; 10, double through baffle; 11, pressure reduction arc plate; 12, reset spring; 13, pressure relief baffle; 14, pressure relief mesh plate; 15, pressure relief cone bucket; 16, reset telescopic rod; 17, plugging rubber ball; 18, sealing frame; 19, separation pipe; 20, attraction seat; 21, power impeller; 22, centrifugal impeller; 23, attraction telescopic rod; 24, elastic membrane ring; 25, negative pressure suction box; 26, expansion bucket; 27, hydraulic telescopic rod; 28, hydraulic push rod; 29, negative pressure plate; 30, drainage bucket; 31, drainage pipeline. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Embodiment, refer to Figures 1 to 12 A multi-stage evaporative condenser, comprising a condensing pipe 1, a condenser control box 3 and a compressor 4 are arranged on the condensing pipe 1, a steam circulation mechanism is arranged behind the condensing pipe 1, a shunt partition plate 6 is arranged in the end of the condensing pipe 1, and a plurality of U-shaped heat exchange coil pipes 5 for heat exchange of water flow are arranged in the condensing pipe 1;

[0037] The steam circulation mechanism is composed of the existing circulating cooling tower, circulating water pump and circulating water pipeline of the condenser, and the compressor 4, throttling valve and evaporator structure used in cooperation outside the condenser are prior art, which will not be described in detail hereinafter;

[0038] A condensing unit, comprising two transition baffle layers 7 fixed on the front and rear outer side walls of the U-shaped heat exchange coil pipe 5, a partition plate assembly and a plurality of double-pass partition plates 10 are arranged between the two transition baffle layers 7 from the elbow pipe to the pipe opening of the U-shaped heat exchange coil pipe 5, the partition plate assembly is composed of two upper-pass partition plates 8 and a single lower-pass partition plate 9, the lower-pass partition plate 9 is located between the two upper-pass partition plates 8, a pressure reduction assembly is arranged on the upper-pass partition plate 8 in the direction of the elbow pipe of the U-shaped heat exchange coil pipe 5, a pressure relief baffle 13 is arranged between the plurality of double-pass partition plates 10, and a plurality of pressure relief assemblies are arranged on the pressure relief baffle 13;

[0039] Further, the inner side walls of the condensing pipe 1 are fixedly connected with the two end transition baffle layers 7, the transition baffle layer 7 is composed of two heat insulation plates, heat insulation cotton is filled between the two heat insulation plates, the U-shaped heat exchange coil pipe 5 is fixedly connected with the inner wall of the condensing pipe 1 through the plurality of double-pass partition plates 10 and the partition plate assembly, the condensing pipe 1 is fixedly connected with the mounting seat 2 at both ends, the pressure reduction assembly comprises a pressure reduction arc plate 11 slidingly arranged on the top of the upper-pass partition plate 8, the pressure reduction arc plate 11 is slidingly connected with a sliding rod, the sliding rod is fixedly connected with the side wall of the upper-pass partition plate 8 through a right-angle plate, a reset spring 12 is sleeved on the outer side wall of the sliding rod, the pressure relief assembly comprises a pressure relief cone bucket 15, the pressure relief baffle 13 is located between the upper and lower pipelines of the U-shaped heat exchange coil pipe 5, the pressure relief baffle 13 is fixedly connected with a pressure relief mesh plate 14 through the pressure relief hole, the pressure relief mesh plate 14 is fixedly connected with the wide-end of the pressure relief cone bucket 15, a blocking rubber ball 17 is fixedly connected with the bottom end of the pressure relief mesh plate 14 through a reset telescopic rod 16, and the diameter of the blocking rubber ball 17 is greater than the inner diameter of the narrow-end of the pressure relief cone bucket 15.

[0040] It should be noted that: the low temperature water flow through the shunt partition 6, into the upper pipeline of U-shaped heat exchange coil 5, then after the steam refrigerant heating water flow will be at a higher temperature from the lower pipeline of U-shaped heat exchange coil 5, and through the shunt partition 6 for low temperature water flow and high temperature water flow separation, in the process of work, high pressure and high temperature steam refrigerant will be from close to the U-shaped heat exchange coil 5 elbow pipe between the upper through partition 8 and the lower through partition 9 between the upper into, then the high temperature and high pressure refrigerant steam into the condenser pipe 1, will flow from the lower through partition 9 below the high pressure, into another space between the upper through partition 8 and the lower through partition 9, then from another upper through partition 8 above the flow into the double through partition 10 position, high temperature refrigerant steam from the upper double through partition 10 in order to flow through, so that the temperature of the refrigerant steam gradually decreases, then in the flow to the pipe port of U-shaped heat exchange coil 5, the refrigerant carrying heat is relatively low, preheating the low temperature water flow through the upper pipeline of U-shaped heat exchange coil 5, avoid low temperature water flow into the U-shaped heat exchange coil 5 after directly with the outside of the high temperature steam, cause the temperature difference between inside and outside of U-shaped heat exchange coil 5 is too large, let the low temperature water flow direction against the flow direction of high temperature refrigerant steam to converge, realize the preheating and gradual heating of low temperature water flow;

[0041] At the same time, the high temperature and high pressure refrigerant steam will extrude the pressure relief arc plate 11 on the upper through partition 8 when entering, so that the pressure relief arc plate 11 slides on the slide rod and compresses the return spring 12, so that the pressure relief arc plate 11 and the upper through partition 8 are dislocated to open the gap, so that part of the high pressure refrigerant steam enters the transition baffle layer 7 near the elbow pipe of U-shaped heat exchange coil 5 through the gap, synchronously heat exchanging the upper and lower pipelines in front of the elbow pipe of U-shaped heat exchange coil 5, so that the temperature of the upper and lower pipelines in the elbow area of U-shaped heat exchange coil 5 is synchronized, avoiding temperature difference in the flow process of the elbow area. The transition baffle layer 7 can block the direct heat exchange of the refrigerant steam with the pipe port and the elbow area of U-shaped heat exchange coil 5, avoid the heat loss of high temperature steam at both ends of the condenser pipe 1, and avoid the stress deformation of the elbow area caused by large temperature difference between inside and outside. At the same time, when the refrigerant steam flows between the double through partition 10, the high pressure steam above the pressure relief baffle 13 will press the blocking rubber ball 17 in the pressure relief cone 15 during the flow process, so that the blocking rubber ball 17 stretches the return telescopic rod 16, separates the blocking rubber ball 17 from the narrow end of the pressure relief cone 15, and then a small part of the refrigerant steam enters the lower part of the pressure relief baffle 13, so as to assist the heat exchange and temperature control of the lower pipeline of U-shaped heat exchange coil 5, so as to ensure that the water flow can still maintain high water temperature after flowing to the rear section of U-shaped heat exchange coil 5;

[0042] Based on the above benefits: so you can use U-shaped heat exchanger coil 5 to the straight line of water flow, reduce the stress deformation caused by the temperature difference between the pipeline, the steam and water flow of reverse intersection delivery, avoid the initial encounter of low temperature water flow and high temperature steam, to achieve a more scientific heat exchange mode;

[0043] U-shaped heat exchanger coil 5 in the lower pipeline between the lower through partition plate 9 and the upper through partition plate 8 close to the U-shaped heat exchanger coil 5 pipe opening side is provided with downward opening through hole, the outer wall of the through hole is connected with suction seat 20 through sealing assembly, suction seat 20 is connected with power impeller 21 through shaft, the top of the shaft is fixed with centrifugal impeller 22, suction seat 20 is provided with suction assembly, suction seat 20 is communicated with negative pressure suction box 25 through two elbow pipes, negative pressure suction box 25 is provided with negative pressure assembly;

[0044] Further, the sealing assembly comprises a sealing frame 18 fixed to the outer wall of the U-shaped heat exchanger coil 5, the bottom of the sealing frame 18 is fixedly connected with a separation pipe 19, the separation pipe 19 is communicated with the U-shaped heat exchanger coil 5, the bottom end of the separation pipe 19 is fixedly connected with the suction seat 20, the suction seat 20 is rotatably connected with the power impeller 21 and the centrifugal impeller 22 through the shaft, the suction assembly comprises a plurality of suction telescopic rods 23 arranged in annular array, the suction seat 20 is provided with a suction chamber, the inner end face of the suction chamber is fixedly connected with an elastic membrane ring 24 through the suction telescopic rod 23, the suction chamber is communicated with the negative pressure suction box 25 through the elbow pipe, the negative pressure assembly comprises a negative pressure plate 29 slidably arranged on the inner wall of the negative pressure suction box 25, the inner end face of the negative pressure suction box 25 is communicated with a hydraulic telescopic rod 27 and a hydraulic push rod 28 through a communication chamber, the piston rod end of the hydraulic telescopic rod 27 is fixedly connected with an expansion bucket 26, the hydraulic push rod 28 is fixedly connected with the bottom end of the negative pressure plate 29, the bottom of the negative pressure suction box 25 is communicated with a drainage pipeline 31 through a drainage bucket 30;

[0045] Need to explain: in the high pressure refrigerant vapor from the lower flow through the lower through the partition 9 steam flow will blow the power impeller 21, so that the power impeller 21 rotation, in turn, through the rotating shaft driven centrifugal impeller 22 in the separation tube 19 rotation, in the process, the water flow in the U-shaped heat exchange coil 5 flow to the separation tube 19, will show a concave tendency, and the centrifugal impeller 22 rotation will drive the separation tube 19 in the flow of liquid rotation, so that the water flow in the small impurities under the action of centrifugal force to the bottom of the suction seat 20 on the collection, and the suction seat 20 on the elastic membrane ring 24 produces pressure, so that the elastic membrane ring 24 in the non suction telescopic rod 23 support site produces concave deformation, and the suction telescopic rod 23 produces the overall down pressure, so that the elastic membrane ring 24 concave deformation part and suction seat 20 inside the suction chamber produces small suction channel, at the same time, the expansion bucket 26 front water flow pressure, push the hydraulic telescopic rod 27 contraction, and through the intercommunication chamber will extrusion of hydraulic transmission to the hydraulic push rod 28, so that the hydraulic push rod 28 push the negative pressure plate 29 up, so that the negative pressure suction box 25 in a relative negative pressure state, convenient for the suction chamber in the suction seat 20 will centrifugal to the bottom of the water flow containing high concentration of impurities suction, greatly reduced the scale formation of impurities, collection into the negative pressure suction box 25 impurity water flow will be through the drainage bucket 30 and drainage pipeline 31 to the outside of the condenser tube 1 transport;

[0046] Based on the above benefits are: so can greatly reduce the U-shaped heat exchange coil 5 in the water flow containing impurities, in turn, extended the U-shaped heat exchange coil 5 in the scale formation period, so that the maintenance cost of condenser is reduced, ensure that the condenser can be used for a long time high efficiency;

[0047] In use, the low-temperature water flows through the upper part of the distribution partition 6, and enters the upper pipeline of the U-shaped heat exchange coil 5. The water heated by the steam refrigerant flows out from the lower pipeline of the U-shaped heat exchange coil 5 at a high temperature, and is separated from the low-temperature water flow by the distribution partition 6. In the working process, the high-pressure and high-temperature steam refrigerant flows into the space between the upper through partition 8 and the lower through partition 9 near the elbow of the U-shaped heat exchange coil 5. The high-temperature and high-pressure refrigerant steam enters the condensing pipe 1, and then flows through the lower part of the lower through partition 9 at a high pressure, enters the space between another upper through partition 8 and another lower through partition 9, and then flows through the upper part of the other upper through partition 8 to enter the position of the double through partition 10. The high-temperature refrigerant steam sequentially flows through the upper part of the double through partition 10, so that the temperature of the refrigerant steam gradually decreases. When the refrigerant steam flows to the pipe opening part of the U-shaped heat exchange coil 5, the heat carried by the refrigerant steam is relatively low, which preheats the low-temperature water flowing through the upper pipeline of the U-shaped heat exchange coil 5. This avoids the low-temperature water directly contacting the external high-temperature steam after entering the U-shaped heat exchange coil 5, causing the temperature difference between the inside and outside of the U-shaped heat exchange coil 5 to be too large, and the flow direction of the low-temperature water being opposite to the flow direction of the high-temperature refrigerant steam, thereby realizing the preheating and gradual heating of the low-temperature water flow.

[0048] Meanwhile, when the high-temperature and high-pressure refrigerant vapor is introduced, it will extrude the decompression arc plate 11 on the upper through partition plate 8, so that the decompression arc plate 11 slides on the slide rod and compresses the return spring 12, so that the decompression arc plate 11 and the upper through partition plate 8 are misaligned to open the gap, allowing a part of the high-pressure refrigerant vapor to pass through the gap into the transition baffle layer 7 of the U-shaped heat exchange coil pipe 5 near the elbow portion, synchronously heat exchanging the upper and lower pipelines in front of the elbow of the U-shaped heat exchange coil pipe 5, so that the temperature of the upper and lower pipelines of the U-shaped heat exchange coil pipe 5 in the elbow area is synchronized, avoiding temperature difference during flow in the elbow area. The transition baffle layer 7 can block the direct heat exchange of the refrigerant vapor to the pipe opening and the elbow area of the U-shaped heat exchange coil pipe 5, avoid the heat loss of the high-temperature vapor at both ends of the condensing pipe 1, and also avoid the stress deformation caused by the large internal and external temperature difference in the elbow area. At the same time, when the refrigerant vapor flows between the double through partition plates 10, the high-pressure vapor above the pressure relief baffle 13 will press the sealing rubber ball 17 in the pressure relief cone 15 during flow, so that the sealing rubber ball 17 stretches the return telescopic rod 16, separates the sealing rubber ball 17 from the narrow end of the pressure relief cone 15, and then allows a small part of the refrigerant vapor to enter below the pressure relief baffle 13, assisting the heat exchange and temperature control of the lower pipeline of the U-shaped heat exchange coil pipe 5, ensuring that the water flow can still maintain high water temperature after flowing to the rear section of the U-shaped heat exchange coil pipe 5. This can utilize the straight-line transportation of the U-shaped heat exchange coil pipe 5 to reduce the stress deformation caused by the internal and external temperature difference of the pipeline, and the reverse intersection transportation of the refrigerant vapor and the water flow can avoid the initial meeting of the low-temperature water flow and the high-temperature vapor, achieving a more scientific heat exchange mode.

[0049] When the high-pressure refrigerant steam flows through the lower side of the lower through partition plate 9, the steam flow will blow the power impeller 21, so that the power impeller 21 rotates, and then drives the centrifugal impeller 22 to rotate in the separation pipe 19 through the rotating shaft. In this process, the water flow in the U-shaped heat exchange coil 5 flows to the separation pipe 19, which has a concave tendency, and the rotation of the centrifugal impeller 22 drives the continuously flowing liquid in the separation pipe 19 to rotate, so that the small impurities in the water flow are attracted to the bottom of the suction seat 20 under the action of centrifugal force, and the elastic membrane ring 24 on the suction seat 20 is pressed, so that the elastic membrane ring 24 is deformed in a concave shape at the support part of the suction telescopic rod 23, and the suction telescopic rod 23 is pressed as a whole, so that the concave deformation part of the elastic membrane ring 24 and the suction chamber in the suction seat 20 form a small suction channel. At the same time, the expansion bucket 26 is pressed by the flow pressure of the water flow, which pushes the hydraulic telescopic rod 27 to shrink, and transmits the extrusion hydraulic pressure to the hydraulic push rod 28 through the intercommunication chamber, so that the hydraulic push rod 28 pushes the negative pressure plate 29 to move upwards, so that the negative pressure suction box 25 is in a relatively negative pressure state, which facilitates the suction chamber in the suction seat 20 to suck the water flow containing high-concentration impurities centrifuged to the bottom, greatly reducing the impurities formed by scale. The impurity water flow collected into the negative pressure suction box 25 will be transported to the outside of the condensing pipe 1 through the drainage bucket 30 and the drainage pipeline 31, which can greatly reduce the impurities contained in the water flow in the U-shaped heat exchange coil 5, thereby prolonging the period of scale formation in the U-shaped heat exchange coil 5, reducing the maintenance cost of the condenser, and ensuring that the condenser can be used efficiently for a long time.

[0050] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A condensing unit of a multi-stage evaporative condenser comprising a condensing tube (1), characterized in that, The condensing pipe (1) is provided with a condenser control box (3) and a compressor (4), the rear of the condensing pipe (1) is provided with a steam circulation mechanism, the end of the condensing pipe (1) is provided with a shunt partition plate (6), the condensing pipe (1) is provided with a plurality of U-shaped heat exchange coils (5) for heat exchange of water flow, two transition baffle layers (7) are fixed on the front and rear outer side walls of the U-shaped heat exchange coil (5), a partition plate assembly and a plurality of double-pass partition plates (10) are sequentially arranged between the two transition baffle layers (7) from the elbow pipe to the pipe opening of the U-shaped heat exchange coil (5), the partition plate assembly is composed of two upper-pass partition plates (8) and a single lower-pass partition plate (9), the lower-pass partition plate (9) is located between the two upper-pass partition plates (8), the upper-pass partition plate (8) located in the elbow pipe direction of the U-shaped heat exchange coil (5) is provided with a pressure reduction assembly, a pressure relief baffle (13) is arranged between the plurality of double-pass partition plates (10), and a plurality of pressure relief assemblies are arranged on the pressure relief baffle (13). The U-shaped heat exchange coil (5) is provided with a downward opening through hole between the lower-pass partition plate (9) and the upper-pass partition plate (8) close to the pipe opening side of the U-shaped heat exchange coil (5), a suction seat (20) is connected to the outer side wall of the through hole through a sealing assembly, the suction seat (20) is connected with a power impeller (21) through a rotating shaft, the top of the rotating shaft is fixed with a centrifugal impeller (22), the suction seat (20) is provided with a suction assembly, and the suction seat (20) is communicated with a negative pressure suction box (25) through two right-angle pipes.

2. A multi-stage evaporative condenser condensing unit according to claim 1, wherein, The inner side wall of the condensing pipe (1) is fixedly connected with the transition baffle layers (7) at both ends, the transition baffle layer (7) is composed of two heat insulation plates, and heat insulation cotton is filled between the two heat insulation plates, the U-shaped heat exchange coil (5) is fixedly connected with the inner wall of the condensing pipe (1) through the double-pass partition plates (10) and the partition plate assembly, and the condensing pipe (1) is fixedly connected with the mounting seat (2) at both ends.

3. A multi-stage evaporative condenser condensing unit according to claim 1, wherein, The pressure reduction assembly comprises a pressure reduction arc plate (11) slidingly arranged on the top of the upper-pass partition plate (8), the pressure reduction arc plate (11) is slidingly connected with a sliding rod, the sliding rod is fixedly connected with the side wall of the upper-pass partition plate (8) through a right-angle plate, and a return spring (12) is sleeved on the outer side wall of the sliding rod.

4. A multi-stage evaporative condenser condensing unit according to claim 1, wherein, The pressure relief assembly comprises a pressure relief cone hopper (15), the pressure relief baffle (13) is located between the upper and lower pipes of the U-shaped heat exchange coil (5), and the pressure relief baffle (13) is fixedly connected with a pressure relief mesh plate (14) through a pressure relief hole.

5. A multiple stage evaporative condenser condensing unit according to claim 4 wherein, The pressure relief mesh plate (14) is fixedly connected with the wide opening end of the pressure relief cone hopper (15), the bottom end of the pressure relief mesh plate (14) is fixedly connected with a blocking rubber ball (17) through a return telescopic rod (16), and the diameter of the blocking rubber ball (17) is greater than the inner diameter of the narrow opening end of the pressure relief cone hopper (15).

6. A multi-stage evaporative condenser condensing unit according to claim 1, wherein, The sealing assembly comprises a sealing frame (18) fixed on the outer wall of the U-shaped heat exchange coil (5), the bottom of the sealing frame (18) is fixedly connected with a separation pipe (19), the separation pipe (19) and the U-shaped heat exchange coil (5) are communicated with each other, the bottom end of the separation pipe (19) is fixedly connected with a suction seat (20), and the suction seat (20) is rotatably connected with a power impeller (21) and a centrifugal impeller (22) through rotating shafts.

7. A multi-stage evaporative condenser condensing unit according to claim 1, wherein, The suction assembly comprises a plurality of suction telescopic rods (23) arranged in an annular array, a suction chamber is formed in the suction seat (20), the inner end surface of the suction chamber is fixedly connected with an elastic membrane ring (24) through the suction telescopic rod (23), and the suction chamber is communicated with a negative pressure suction box (25) through a right-angle pipe.

8. A multi-stage evaporative condenser condensing unit according to claim 1, wherein, The negative pressure assembly comprises a negative pressure plate (29) slidingly arranged on the inner wall of the negative pressure suction box (25), the inner end surface of the negative pressure suction box (25) is respectively communicated with a hydraulic telescopic rod (27) and a hydraulic push rod (28) through an intercommunication chamber, the piston rod end of the hydraulic telescopic rod (27) is fixedly connected with an expansion bucket (26), the hydraulic push rod (28) is fixedly connected with the bottom end of the negative pressure plate (29), and the bottom of the negative pressure suction box (25) is communicated with a drainage pipeline (31) through a drainage bucket (30).

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