Triple-effect evaporation circulating device for extracted water

Abstract

The invention relates to the technical field of evaporation circulation devices, and discloses an extraction water triple-effect evaporation circulation device which comprises a separation chamber, a heating chamber is arranged in the separation chamber, and a conveying mechanism and a heating mechanism are arranged on the heating chamber; and the conveying mechanism comprises a heat exchange pipe and a magnetic ring, the heat exchange pipe is arranged in the heating chamber, and a first silica gel ring and a second silica gel ring are arranged at the upper end and the lower end of the heat exchange pipe correspondingly. By arranging the first silica gel ring and the second silica gel ring, when the heat exchange tube expands with heat and contracts with cold in the heating process, the vibration amplitude is enhanced under the action of a magnetic field by utilizing small-amplitude vibration caused by elastic force of the silica gel rings and matching the magnetic rings with N / S poles alternately arranged in the heating chamber with the heat exchange tube made of a magnetic stainless steel material; scale can be effectively prevented from being attached to the inner wall of the heat exchange pipe, heat transfer resistance is reduced, frequent shutdown cleaning is not needed, continuous and stable operation of the device is guaranteed, and the equipment maintenance period is prolonged.

Description

Technical Field

[0001] This invention relates to the field of evaporation circulation device technology, specifically a triple-effect evaporation circulation device for extracting water. Background Technology

[0002] Polycaprolactam (also known as Nylon 6) is polymerized from caprolactam. During the polymerization process, due to the equilibrium of the polymerization reaction, about 10% of the caprolactam remains unconverted. The polymer needs to be washed with hot water in an extraction tower to remove the unconverted caprolactam. The extract water containing caprolactam generated during the washing process needs to be evaporated and concentrated to facilitate the separation and purification of caprolactam in the extract water and avoid waste of raw materials.

[0003] Currently, factories typically use double-effect or triple-effect evaporators to evaporate and concentrate extract water. Double-effect evaporators are suitable for small and medium-sized production due to their simple structure, while triple-effect evaporators are more suitable for large-scale production. However, in existing triple-effect evaporation circulation devices, impurities in the extract water easily form scale on the inner wall of the heat exchange tubes during operation. Long-term operation will lead to an increase in the heat transfer resistance of the heat exchange tubes, affecting the evaporation effect of the extract water, requiring more live steam, thus affecting production costs, and requiring frequent shutdowns for cleaning, which affects production efficiency. Therefore, a triple-effect evaporation circulation device for extract water is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The purpose of this invention is to provide a triple-effect evaporation and circulation device for extracting water, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a triple-effect evaporation and circulation device for extracting water, comprising a separation chamber, wherein a heating chamber is provided inside the separation chamber, and a conveying mechanism and a heating mechanism are provided on the heating chamber; The conveying mechanism includes a heat exchange tube and a magnetic ring. The heat exchange tube is disposed inside the heating chamber. A first silicone ring and a second silicone ring are respectively disposed at the upper and lower ends of the heat exchange tube. The magnetic ring is installed on the inner wall of the heating chamber and is sleeved on the outside of the heat exchange tube.

[0006] Preferably, the number of magnetic rings is three sets, and the three sets of magnetic rings are evenly distributed inside the heating chamber along the axial direction of the heat exchange tube. Each set of magnetic rings has four pairs of N / S poles, which are arranged alternately around each other.

[0007] Preferably, a fixed base is fixed to the bottom of the heating chamber, a water inlet pipe is connected to the bottom of the fixed base, a support block is fixedly connected to the inner wall of the fixed base, a conveying assembly is provided on the fixed base, and a sealing assembly is provided on the conveying assembly.

[0008] Preferably, the conveying assembly includes a base plate and a top plate. The base plate is connected to the inner wall of the fixing seat through a first silicone ring. The bottom of the heat exchange tube is connected to the base plate, and the top of the heat exchange tube is connected to the top plate. The top plate is connected to the inner wall of the heating chamber through a second silicone ring.

[0009] Preferably, the sealing assembly includes a first sealing cloth and a second sealing cloth, the first sealing cloth being disposed on the support block and the bottom plate, and the second sealing cloth being disposed on the top plate and the heating chamber.

[0010] Preferably, the heating mechanism includes a steam inlet pipe and a mesh plate. The steam inlet pipe is connected to the bottom of the fixed base. The mesh plate is fixed inside the heating chamber. There are three mesh plates, and all three mesh plates are sleeved on the heat exchange tube.

[0011] Preferably, the bottom of the fixing base is connected to one end of a spiral tube, the spiral tube is arranged around the water inlet pipe, a drain valve is provided on the spiral tube, and the other end of the spiral tube is connected to a drain pipe.

[0012] Preferably, the top of the heating chamber is provided with a separation mechanism, which includes a fixed plate, a rotating rod, and an impeller. The fixed plate is fixed to the heating chamber, the rotating rod rotates through the fixed plate, the impeller is located at the bottom of the rotating rod, the top of the rotating rod is connected to a canopy, and the bottom of the canopy is provided with a metal mesh.

[0013] Preferably, the number of separation chambers is three. The tops of the two separation chambers on the left are connected to the steam inlet pipes on the corresponding separation chambers on the right via steam connection pipes, and the bottoms of the two separation chambers on the left are connected to the water inlet pipes on the corresponding separation chambers on the right via water supply pipes.

[0014] Preferably, the top and bottom of the rightmost separation chamber are respectively connected to an exhaust pipe and a water outlet pipe, and a water pump is installed on the water supply pipe and the water outlet pipe.

[0015] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. This triple-effect evaporation circulation device for water extraction, by setting a first silicone ring and a second silicone ring, utilizes the elastic force of the silicone ring to induce small-amplitude vibrations when the heat exchange tube expands and contracts during the heating process. Then, through the cooperation of the magnetic ring with alternating N / S poles in the heating chamber and the magnetic stainless steel heat exchange tube, the vibration amplitude is enhanced under the action of the magnetic field. This can effectively prevent scale from adhering to the inner wall of the heat exchange tube, reduce heat transfer resistance, eliminate the need for frequent shutdowns for cleaning, ensure continuous and stable operation of the device, and extend the equipment maintenance cycle.

[0016] 2. This triple-effect evaporation and circulation device for extracting water has three sets of mesh plates in the heating mechanism to ensure that the steam comes into uniform contact with each heat exchange tube, so that each heat exchange tube is heated evenly and the effects of excessive or insufficient local heating on the evaporation of the extracting water are avoided. At the same time, the condensate flows around the water inlet pipe through the spiral tube, and the residual heat in the condensate is used to preheat the extracting water to be treated, further reducing the consumption of live steam.

[0017] 3. This triple-effect evaporation and circulation device for extracting water accelerates the vapor-liquid separation of the extracted water by setting an impeller. In conjunction with the rotating umbrella cover and metal mesh, it double-intercepts the mist droplets in the secondary steam, reduces the amount of liquid carried by the steam, avoids material loss caused by high-concentration droplets entering the next effect, ensures the stability of the concentration gradient of the extracted water in each effect, ensures the full utilization of the latent heat of the secondary steam, provides high-quality steam for heating the subsequent effects, and ultimately improves the stability of the overall concentration effect.

[0018] 4. This triple-effect evaporation circulation device for water extraction places the heating chamber inside the separation chamber, allowing the secondary steam generated by heating and evaporation to directly enter the separation chamber for vapor-liquid separation without long-distance transportation. This reduces heat loss and liquid carryover risk during steam transmission. At the same time, the compact layout of the heating chamber and the separation chamber improves space utilization, enabling the separation mechanism to intercept and separate the newly generated steam more quickly, improving vapor-liquid separation efficiency, thereby ensuring the quality of the secondary steam and providing a purer heat source for the next heating effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall invention; Figure 2 This is an overall sectional view of the present invention; Figure 3 This is a schematic diagram of the heating chamber of the present invention; Figure 4 This is a cross-sectional view of the heating chamber of the present invention; Figure 5 This is a schematic diagram of the internal structure of the heating chamber of the present invention; Figure 6 This is a schematic diagram of the stencil of the present invention; Figure 7 This is a schematic diagram of the bottom of the separation structure of the present invention; Figure 8 This is an enlarged schematic diagram of point A in the present invention; Figure 9 This is an enlarged schematic diagram of section B of the present invention.

[0020] In the diagram: 1. Separation chamber; 2. Heating chamber; 3. Conveying mechanism; 31. Fixed base; 32. Base plate; 33. Heat exchange tube; 34. Top plate; 35. First silicone ring; 36. Support block; 37. First sealing cloth; 38. Second silicone ring; 39. Second sealing cloth; 310. Magnetic ring; 4. Heating mechanism; 41. Steam inlet pipe; 42. Mesh plate; 43. Spiral tube; 44. Steam trap; 45. Drain pipe; 5. Separation mechanism; 51. Fixed plate; 52. Rotating rod; 53. Impeller; 54. Umbrella cover; 55. Metal mesh; 6. Water inlet pipe; 7. Steam connection pipe; 8. Water delivery pipe; 9. Water pump; 10. Exhaust pipe; 11. Water outlet pipe. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0025] Please see Figure 1-9One embodiment of the present invention is: a triple-effect evaporation circulation device for extracting water, including a separation chamber 1, the number of separation chambers 1 being three, a heating chamber 2 being provided inside the separation chamber 1, the heating chamber 2 being provided inside the separation chamber 1 so that the secondary steam generated after heating can directly enter the separation chamber 1, avoiding heat loss of steam during transportation, and a conveying mechanism 3 and a heating mechanism 4 being provided on the heating chamber 2; The conveying mechanism 3 includes a heat exchange tube 33 and a magnetic ring 310. The heat exchange tube 33 is located inside the heating chamber 2. The magnetic ring 310 is installed on the inner wall of the heating chamber 2 and is sleeved on the outside of the heat exchange tube 33. There are three sets of magnetic rings 310. The three sets of magnetic rings 310 are evenly distributed along the axial direction of the heat exchange tube 33 inside the heating chamber 2. Each set of magnetic rings 310 has four pairs of N / S poles, which are arranged alternately around each other, presenting an unstable magnetic field inside the heating chamber 2. When the heat exchange tube 33 vibrates, the vibration amplitude of the heat exchange tube 33 is increased. A fixed seat 31 is fixed at the bottom of the heating chamber 2. A water inlet pipe 6 is connected to the bottom of the fixed seat 31. The water inlet pipe 6 is connected to an external steam generator to provide live steam for heating and evaporating the extracted water. A support block 36 is fixedly connected to the inner wall of the fixed seat 31. A conveying component is provided on the fixed seat 31. A sealing component is provided on the conveying component.

[0026] The conveying assembly includes a base plate 32 and a top plate 34. The base plate 32 is connected to the inner wall of the fixed seat 31 via a first silicone ring 35, and the base plate 32 is located above the support block 36. The support block 36 is provided to support the base plate 32. The bottom of the heat exchange tube 33 is connected to the base plate 32, and the top of the heat exchange tube 33 is connected to the top plate 34. The heat exchange tube 33 is made of magnetic stainless steel. The top plate 34 is connected to the inner wall of the heating chamber 2 via a second silicone ring 38. The sealing assembly includes a first sealing cloth 37 and a second sealing cloth 39. The first sealing cloth 37 is disposed on the support block 36 and the base plate 32, and the second sealing cloth 39 is disposed on the top plate 34 and the heating chamber 2.

[0027] Preferably, the heating mechanism 4 includes a steam inlet pipe 41 and a mesh plate 42. The steam inlet pipe 41 is connected to the bottom of the fixed base 31. The mesh plate 42 is fixed inside the heating chamber 2. There are three mesh plates 42. All three mesh plates 42 are sleeved on the heat exchange tube 33. One end of the spiral tube 43 is connected to the bottom of the fixed base 31. The spiral tube 43 is arranged around the water inlet pipe 6. A drain valve 44 is provided on the spiral tube 43. The other end of the spiral tube 43 is connected to a drain pipe 45. The top of the leftmost separation chamber 1 is connected to the steam inlet pipe 41 on the middle separation chamber 1 via a steam connection pipe 7, and the bottom is connected to the water inlet pipe 6 on the middle separation chamber 1 via a water supply pipe 8. The top of the middle separation chamber 1 is connected to the steam inlet pipe 41 on the rightmost separation chamber 1 via a steam connection pipe 7, and the bottom is connected to the water inlet pipe 6 on the corresponding rightmost separation chamber 1 via a water supply pipe 8, thus achieving water and steam communication between the three separation chambers 1. The top of the rightmost separation chamber 1 is connected to an exhaust pipe 10 for venting steam, and the bottom of the rightmost separation chamber 1 is connected to an outlet pipe 11 for discharging the concentrated extract water. Water pumps 9 are installed on the water supply pipe 8 and the outlet pipe 11.

[0028] Working principle: The extracted water to be concentrated is injected into the fixed base 31 through the water inlet pipe 6, and then flows into the heat exchange tube 33. At the same time, the steam generated by the external steam generator enters the heating chamber 2 through the steam inlet pipe 41. The steam entering the heating chamber 2 will be discharged upward through the mesh holes on the mesh plate 42. Each mesh hole corresponds to a heat exchange tube 33, so that the steam can heat each heat exchange tube 33 evenly, avoiding uneven heating and affecting the evaporation effect. When the steam heats and evaporates the extracted water in the heat exchange tube 33, the heat exchange tube 33 will produce a slight thermal expansion and contraction phenomenon. Combined with the elasticity of the first silicone ring 35 and the second silicone ring 38, it will cause the heat exchange tube 33 to vibrate slightly. Since the heat exchange tube 33 is made of magnetic stainless steel, when the heat exchange tube 33 vibrates slightly, the vibration is amplified by the surrounding magnetic ring 310, thereby preventing the scale generated during the heating of the extracted water in the heat exchange tube 33 from adhering to the inner wall of the heat exchange tube 33 and affecting the heat exchange effect. Please see Figure 1-9 When steam comes into contact with heat exchange tube 33, condensate will be generated and adhere to the heat exchange tube 33. The presence of condensate will affect the subsequent contact effect between steam and heat exchange tube 33. At this time, the vibration of heat exchange tube 33 during the heating process can accelerate the downward flow of condensate and prevent the condensate from forming a water film on the surface of heat exchange tube 33, which would affect heat exchange. The downward condensate will flow into spiral tube 43. Through the setting of steam trap 44, condensate can enter spiral tube 43, while steam cannot enter, thus avoiding the loss of steam heat. At the same time, condensate still contains a large amount of heat. When condensate flows in spiral tube 43, it will exchange heat with water inlet pipe 6, thereby using the heat of condensate to heat the extraction water entering heating chamber 2, thereby improving the heat utilization rate and saving the heating time of extraction water.

[0029] Based on the above embodiments, in another embodiment of the present invention, a separation mechanism 5 is provided on the top of the heating chamber 2. The separation mechanism 5 includes a fixed plate 51, a rotating rod 52, and an impeller 53. The fixed plate 51 is fixed on the heating chamber 2. The rotating rod 52 rotates through the fixed plate 51. The impeller 53 is provided at the bottom of the rotating rod 52. A canopy 54 is connected to the top of the rotating rod 52. A metal mesh 55 is provided at the bottom of the canopy 54.

[0030] Working principle: After being heated and evaporated, the extracted water flows through impeller 53, causing it to rotate. The rotation of impeller 53 accelerates the separation of extracted water and steam. Simultaneously, impeller 53, via rotor 52, drives umbrella cover 54 to rotate. The steam generated from the heated extracted water includes saturated steam and mist droplets, which contact the bottom of umbrella cover 54, thus intercepting the mist droplets. The steam also travels along umbrella cover 54 and contacts metal mesh 55, further intercepting the mist droplets and preventing excessive water carryover, which would reduce the latent heat of the steam. The intercepted mist droplets will combine with the extracted water. Since the composition of the mist droplets is exactly the same as that of the extracted water, it will not affect the concentration of the extracted water. It can also prevent the mist droplets from entering the next effect evaporation, which would lead to material loss. The steam that has passed through the interception will enter the heating chamber 2 of the next effect through the steam connection pipe 7. The concentrated extracted water will enter the heat exchange tube 33 of the next effect through the water pump 9, thus performing the second effect. Similarly, the steam generated in the second effect will enter the heating chamber 2 of the third effect to heat the extracted water that has been concentrated again.

[0031] This invention provides a triple-effect evaporation circulation device for water extraction. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A triple-effect evaporation and circulation device for extracting water, comprising a separation chamber (1), characterized in that: The separation chamber (1) is equipped with a heating chamber (2), and the heating chamber (2) is equipped with a conveying mechanism (3) and a heating mechanism (4). The conveying mechanism (3) includes a heat exchange tube (33) and a magnetic ring (310). The heat exchange tube (33) is located inside the heating chamber (2). A first silicone ring (35) and a second silicone ring (38) are respectively provided at the upper and lower ends of the heat exchange tube (33). The magnetic ring (310) is installed on the inner wall of the heating chamber (2) and is sleeved on the outside of the heat exchange tube (33).

2. The triple-effect evaporation and circulation device for extracting water according to claim 1, characterized in that: The number of magnetic rings (310) is three sets. The three sets of magnetic rings (310) are evenly distributed inside the heating chamber (2) along the axial direction of the heat exchange tube (33). Each set of magnetic rings (310) has four pairs of N / S poles, which are arranged alternately around each other.

3. The triple-effect evaporation and circulation device for extracting water according to claim 2, characterized in that: The bottom of the heating chamber (2) is fixed with a fixed seat (31), and the bottom of the fixed seat (31) is connected to a water inlet pipe (6). The inner wall of the fixed seat (31) is fixedly connected with a support block (36). A conveying component is provided on the fixed seat (31), and a sealing component is provided on the conveying component.

4. The triple-effect evaporation and circulation device for extracting water according to claim 3, characterized in that: The conveying assembly includes a base plate (32) and a top plate (34). The base plate (32) is connected to the inner wall of the fixed seat (31) through a first silicone ring (35). The bottom of the heat exchange tube (33) is connected to the base plate (32), and the top of the heat exchange tube (33) is connected to the top plate (34). The top plate (34) is connected to the inner wall of the heating chamber (2) through a second silicone ring (38).

5. The triple-effect evaporation and circulation device for extracting water according to claim 4, characterized in that: The sealing assembly includes a first sealing cloth (37) and a second sealing cloth (39). The first sealing cloth (37) is disposed on the support block (36) and the bottom plate (32), and the second sealing cloth (39) is disposed on the top plate (34) and the heating chamber (2).

6. The triple-effect evaporation and circulation device for extracting water according to claim 5, characterized in that: The heating mechanism (4) includes a steam inlet pipe (41) and a mesh plate (42). The steam inlet pipe (41) is connected to the bottom of the fixed base (31). The mesh plate (42) is fixed inside the heating chamber (2). There are three mesh plates (42), and all three mesh plates (42) are sleeved on the heat exchange tube (33).

7. The triple-effect evaporation and circulation device for extracting water according to claim 6, characterized in that: The bottom of the fixed base (31) is connected to one end of a spiral tube (43), which is arranged around the water inlet pipe (6). A drain valve (44) is provided on the spiral tube (43), and the other end of the spiral tube (43) is connected to a drain pipe (45).

8. The triple-effect evaporation and circulation device for extracting water according to claim 7, characterized in that: The top of the heating chamber (2) is provided with a separation mechanism (5). The separation mechanism (5) includes a fixed plate (51), a rotating rod (52), and an impeller (53). The fixed plate (51) is fixed on the heating chamber (2). The rotating rod (52) rotates through the fixed plate (51). The impeller (53) is located at the bottom of the rotating rod (52). The top of the rotating rod (52) is connected to a canopy (54). The bottom of the canopy (54) is provided with a metal mesh (55).

9. The triple-effect evaporation and circulation device for extracting water according to claim 8, characterized in that: The number of separation chambers (1) is three. The tops of the two separation chambers (1) on the left are connected to the steam inlet pipe (41) on the corresponding separation chamber (1) on the right through a steam connection pipe (7). The bottoms of the two separation chambers (1) on the left are connected to the water inlet pipe (6) on the corresponding separation chamber (1) on the right through a water supply pipe (8).

10. The triple-effect evaporation and circulation device for extracting water according to claim 9, characterized in that: The top and bottom of the rightmost separation chamber (1) are respectively connected to an exhaust pipe (10) and a water outlet pipe (11), and a water pump (9) is installed on the water supply pipe (8) and the water outlet pipe (11).

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