Application process of an integrated falling film evaporator

Abstract

This invention discloses a process for using an integrated falling film evaporator, comprising a base frame, an evaporation mechanism fixedly installed on the left side of the top of the base frame, a condensation mechanism fixedly installed on the right side of the top of the base frame, and a rear plate fixedly connected to the rear of the base frame via a fixing plate. This invention relates to the field of evaporator technology. This multi-effect integrated falling film evaporator and its method of use, by installing a baffle plate, a gas collection frame, and a gas delivery frame inside the evaporator tank, with an external heat exchange tube and a sliding rod installed between them, and an inner heat exchange tube arranged inside the external heat exchange tube, with both ends of the inner heat exchange tube connected to the gas collection frame and the gas delivery frame respectively, and used in conjunction with a condensation mechanism and a heat preservation mechanism, this structure allows for double-layer heating of the feed liquid after it enters the external heat exchange tube, through both the outside of the external heat exchange tube and the inner heat exchange tube.

Description

Technical Field

[0001] This invention relates to the field of evaporator technology, specifically to an integrated falling film evaporator and its application process. Background Technology

[0002] Falling film evaporation involves adding the feed liquid from the upper tube box of the heating chamber of a falling film evaporator. The liquid is then evenly distributed into each heat exchange tube by a liquid distribution and film-forming device. Under the influence of gravity, vacuum induction, and airflow, the liquid forms a uniform film that flows downwards. During this flow, the liquid is heated and vaporized by the shell-side heating medium. The resulting vapor and liquid phase enter the separation chamber of the evaporator together, where they are fully separated. The vapor then enters the condenser for condensation (single-effect operation) or enters the next effect evaporator as a heating medium, thus achieving multi-effect operation. However, in existing evaporators, the residence time of the feed liquid inside the heat exchange tubes is short during evaporation, resulting in insufficient vaporization of water during heating. Patent documents have addressed this issue.

[0003] For example, Chinese patent CN212039059U discloses a multi-effect falling film evaporator. This utility model discloses a multi-effect falling film evaporator, including a casing. A feed housing is installed on the upper surface of the casing, and a feed pipe is installed on the upper surface of the feed housing. A hot liquid outlet pipe is provided on the right surface of the feed housing. Heat exchange tubes are installed inside the casing, and a lower tube column is installed on the lower surface of the casing. A hot liquid inlet pipe is installed on the left surface of the lower tube column. This evaporator can granulate the hot liquid medium into a hot liquid film, effectively achieving efficient evaporation of water in the feed liquid. It can increase the transport time of the feed liquid in the casing, allowing the water in the feed liquid to be heated and vaporized by the hot liquid film during flow, resulting in complete vapor-liquid separation. It can effectively and evenly distribute the feed liquid into each heat exchange tube, improving the film formation effect of the feed liquid in the heat exchange tubes. It has the advantages of high heat exchange efficiency and low liquid circulation volume.

[0004] Although the aforementioned patent improves heat exchange efficiency by increasing the inner diameter of the tubing, this device has a limited function in actual use and is prone to significant defects. For example, the evaporator has a wide range of applications and the types of liquids it is used to evaporate vary. When evaporating liquids with high viscosity, the liquid is heated to a high temperature and vaporizes rapidly, which can easily cause blockage of the heat exchange tubes. The solution mentioned in the document also requires threaded flow, which further increases the probability of blockage. At the same time, most evaporators on the market have this defect, which reduces the application range of the equipment. Therefore, a new integrated falling film evaporator has been designed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an integrated falling film evaporator and its application process, which solves the problem that existing equipment is prone to clogging of heat exchange tubes when evaporating viscous liquids.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: an integrated falling film evaporator, comprising a base frame, an evaporation mechanism fixedly installed on the left side of the top of the base frame, a condensation mechanism fixedly installed on the right side of the top of the base frame, a rear plate fixedly connected to the rear of the base frame via a fixing plate, and a heat preservation mechanism fixedly connected to the top of the rear plate.

[0007] Preferably, the evaporation mechanism includes an evaporator, which is fixedly connected to the surface of the rear plate via a bracket and located at the top of the bottom frame. An air baffle is fixedly connected to the upper part of the inner wall of the evaporator. An external heat exchange tube is fixedly connected to the top of the air baffle through an opening, and several external heat exchange tubes are arranged in a ring at equal intervals. A gas collection frame is fixedly connected to the lower part of the inner wall of the evaporator. Ventilation holes are provided at the top and bottom of the air baffle and the gas collection frame. A slide rod is slidably installed on the inner side of the vent hole. A first vapor plug and a second vapor plug, which cooperate with the air baffle, are fixedly installed on the surface of the slide rod at the top and bottom of the air baffle, respectively. A third vapor plug and a fourth vapor plug, which cooperate with the gas collection frame, are fixedly installed on the lower part of the slide rod at the upper and lower parts of the gas collection frame, respectively.

[0008] Preferably, the upper and lower parts of the slide bar surface, respectively located above the air baffle and below the gas collection frame, are provided with an air inlet groove and an air outlet groove. A float plate is fixedly connected to the top of the first gas plug, and a spring is fixedly connected to the top of the float plate. A gas delivery frame is fixedly connected to the upper part of the inner wall of the evaporator, and the top of the spring is fixedly connected to the bottom of the gas delivery frame. An impact plate is fixedly connected to the top of the third gas plug. An inner heat exchange tube is fixedly connected to the bottom of the gas delivery frame through an opening, and several inner heat exchange tubes are provided. The bottom end of the inner heat exchange tube passes through the outer heat exchange tube, the impact plate, and the gas collection frame in sequence and extends into the interior of the gas collection frame. A first heat insulation pipe is fixedly connected to the left side of the evaporator through an opening, and the right end of the first heat insulation pipe passes through the evaporator and extends to the right side of the evaporator. An outlet branch pipe is connected to the right side of the gas collection frame, and one end of the outlet branch pipe passes through the evaporator and connects to the top of the first heat insulation pipe.

[0009] Preferably, a first material pipe is fixedly connected to the left side of the first insulation pipe through an opening, and the right end of the first material pipe extends to the inside of the first insulation pipe. A liquid pump is fixedly connected to the left side of the top of the bottom frame through an opening, and a feeding pipe is fixedly connected to the outlet of the liquid pump. The top end of the feeding pipe passes through the evaporator and the gas conveying frame in sequence and extends into the interior of the evaporator.

[0010] Preferably, the condensation mechanism includes a condensation tank, which is fixedly connected to the rear plate via a bracket and located at the top of the bottom frame. A second threaded sleeve for use with the first insulation pipe is fixedly connected to the right side of the condensation tank through an opening. A curved material pipe is provided between the two sides of the inner cavity of the condensation tank. The right end of the curved material pipe passes through the condensation tank and the bottom frame in sequence and is fixedly connected to the inlet of the liquid pump. The left end of the curved material pipe is threadedly connected to a first threaded sleeve for use with the first material pipe. The left side of the second insulation pipe is threadedly connected to a second threaded sleeve for use with the first insulation pipe. A handle is fixedly connected to the surface of the second threaded sleeve. A gas-liquid separator is fixedly connected to the upper part of the inner wall of the condensation tank.

[0011] Preferably, a compressor is fixedly connected to the top right side of the bottom frame through an opening. The air inlet of the compressor is fixedly connected to a guide pipe, and one end of the guide pipe passes through the condenser and extends into the interior of the condenser. The air outlet of the compressor is fixedly connected to a vent pipe, one end of which passes through the evaporator and the gas delivery frame in sequence and extends into the interior of the gas delivery frame. A branch pipe is connected to the left side of the bottom of the vent pipe, and one end of the branch pipe passes through the evaporator and extends into the interior of the evaporator.

[0012] Preferably, both the evaporator and the condenser have drain pipes fixedly connected to their bottoms through openings, and the lower end of the drain pipes penetrates the bottom frame and connects to the top of the curved feed pipe. Solenoid valves are fixedly installed on the surfaces of both the drain pipes and the condenser.

[0013] Preferably, the heat preservation mechanism includes a right-angle connecting pipe, which is fixedly installed on the surface of the venting pipe. Both ends of the right-angle connecting pipe are fixedly connected to connecting rings, and the connecting rings are sleeved on the surface of the venting pipe. Several connecting rings are provided, and heat preservation pads are fixedly connected between the several connecting rings. A support rod is fixedly connected to the inner side of the connecting ring in a ring shape, and a pulley is rotatably installed on the end of the support rod near the venting pipe.

[0014] Preferably, a shrink ring is fixedly connected to the left side of the connecting ring on the upper left side, a sliding groove is provided on the top of the rear plate, a slide block is slidably installed inside the sliding groove, the slide block and the shrink ring are fixedly connected by a bracket, a fixing frame is fixedly installed on both sides of the rear plate, a rocker arm is rotatably connected to the front side of the inner cavity of the fixing frame, a take-up reel is fixedly connected to the surface of the rocker arm, a steel cable is provided between the two take-up reels and the steel cable passes through the slide block, and guide wheels are installed on both sides of the bottom of the inner cavity of the rear plate, and the top of the guide wheels is in contact with the steel cable.

[0015] This invention also discloses a process for using an integrated falling film evaporator, specifically including the following steps:

[0016] S1. Before starting work, rotate the first threaded sleeve and the second threaded sleeve to connect the second insulation pipe, the curved material pipe, the first insulation pipe, and the first material pipe. Then, connect the left end of the first material pipe to the liquid source and manually rotate the rocker on the left to wind up the steel cable so that the slide moves by pulling the shrink ring and the insulation pad through the bracket, thereby covering the surface of the venting pipe. The pulley and support rod on the inner side of the connecting ring can support the connecting ring and slide it. After completing the preparation work, proceed with the evaporation process.

[0017] S2. During the evaporation process, the feed pump and compressor are started simultaneously. Then, the solenoid valve on the curved feed pipe is opened. At this time, the low-temperature feed liquid enters the feed pump through the first feed pipe and the curved feed pipe. The feed pump uses its own pressure to draw the feed liquid and inject it into the interior of the evaporator. Simultaneously, the initial steam is compressed by the compressor and enters the inner side of the venting pipe. After entering the evaporator, the feed liquid falls on the top of the baffle plate and then flows evenly into the inner side of the external heat exchange tube in a film-like downward flow. At this time, the high-temperature steam inside the venting pipe flows through the branch pipe... The steam is injected into the interior of the gas delivery frame by one end of the vent pipe. The steam is then split inside the gas delivery frame and enters the inner heat exchange tubes. At this time, the liquid inside the outer heat exchange tube is heated by both the inner and outer layers, which improves the evaporation efficiency. Meanwhile, the slide bar is in a state where the tension of the spring is equal to the weight of the gas delivery frame, thus canceling each other out. As the gas-liquid mixture inside the outer heat exchange tube flows out and impacts the impact plate, the impact plate and slide bar increase in weight. The first steam plug blocks the upper vent hole, and the third and fourth steam plugs block the lower vent hole.

[0018] When the liquid flowing inside the external heat exchanger tube is a highly viscous material, the high internal temperature causes it to become viscous and clog the tube, making it difficult for the liquid to flow. At this point, the impact plate loses its impact force, and the sliding rod and spring regain their restoring force balance. Due to the blockage in the external heat exchanger tube, the liquid inside the sliding rod accumulates. As the accumulated liquid rises, the buoyancy of the float plate combined with the spring's tension causes the upward force to exceed the weight of the gas delivery frame. The gas delivery frame is then lifted, and the inlet and outlet channels respectively enter the interior of the gas accumulation frame and the upper part of the baffle plate. Simultaneously, the second, fifth, and fourth steam plugs again block the upper and lower vent holes. At this point, high-pressure steam flows through the sliding rod and inlet channel... The function of the vent groove is to allow steam to enter the upper space of the baffle plate. As the amount of steam entering increases, the pressure in the upper space also increases, which forces the liquid material downward, thus pushing the viscous liquid inside the external heat exchange tube out of the external heat exchange tube. When the external heat exchange tube is unblocked, the liquid material impacts the impact plate again, causing the slide bar to descend and cut off the steam from entering the upper space. When the steam falls to the bottom of the evaporator, it condenses into liquid and finally enters the interior of the first insulation tube and contacts the low-temperature first material tube, increasing the condensation efficiency. At the same time, it preheats the liquid material inside. When too much condensate accumulates, it can submerge the first material tube, increasing the preheating effect. Meanwhile, the steam inside the vent frame enters the first insulation tube through the vent branch pipe for the next process.

[0019] S3. After the evaporation process is completed, the steam and liquid enter the condenser through the second insulation pipe and the curved feed pipe, respectively. The liquid is delayed in the high-temperature environment inside the condenser through the curved feed pipe, while the steam is re-condensed and finally passes through the gas-liquid separator and returns to the compressor through the gas guide pipe for mechanical compression and reuse. Then it enters the condenser again through the vent pipe. The preheated liquid continues to enter the condenser for evaporation through the curved feed pipe and the first material pipe. The function of the drain pipe and the solenoid valve is to allow the liquid to be pumped back into the condenser for secondary evaporation if the evaporation is not up to standard. The insulation pad can keep the vent pipe warm. The insulation pad can be opened for easy inspection. After the work is completed, the second threaded sleeve and the first threaded sleeve can be unscrewed to clean the curved feed pipe, the first material pipe, the first insulation pipe and the second threaded sleeve.

[0020] This invention provides an integrated falling film evaporator and its application process. Compared with existing technologies, it has the following advantages:

[0021] (1) The integrated falling film evaporator has a baffle plate, a gas collection frame and a gas delivery frame installed inside the evaporator, and an external heat exchange tube and a sliding rod installed between them. An internal heat exchange tube is set inside the external heat exchange tube, and the two ends of the internal heat exchange tube are connected to the gas collection frame and the gas delivery frame respectively. When used with a condensation mechanism and a heat preservation mechanism, this structure can provide double heating through the outside of the external heat exchange tube and the internal heat exchange tube after the liquid enters the external heat exchange tube, thereby improving the vaporization efficiency and concentration quality. At the same time, when evaporating viscous liquid, if it is blocked, the structure on the surface of the sliding rod can introduce high-pressure steam into the upper space to pressurize the liquid and push the viscous liquid out of the external heat exchange tube, thus solving the blockage problem. Furthermore, the first material tube and the first heat preservation tube passing through the evaporator can improve the condensation rate and achieve the preheating effect of the liquid, effectively improving the overall practicality.

[0022] (2) The integrated falling film evaporator has a first insulation pipe and a second insulation pipe installed inside the condenser and the evaporator respectively, and the first material pipe and the curved material pipe pass through inside them. This structure can effectively increase the amount of steam precooling condensation by placing the first material pipe and the curved material pipe at the bottom and passing through them. At the same time, the material liquid is preheated by the condensate, which not only facilitates the subsequent evaporation process, but also avoids the waste of heat energy.

[0023] (3) The integrated falling film evaporator has a connecting ring and a heat insulation pad on the surface of the vent pipe and is connected to the slide by a bracket. This structure can cover the surface of the vent pipe when it is transmitting steam, effectively reducing heat loss. The heat insulation pad can be pulled out when the vent pipe is maintained, which increases convenience.

[0024] (4) The integrated falling film evaporator has a first threaded sleeve and a second threaded sleeve respectively threaded to one end of the curved material pipe and the second insulation pipe, so that the curved material pipe and the second insulation pipe can be easily connected and separated from the first insulation pipe and the first material pipe, making it easier to clean the inside of the curved material pipe and the second insulation pipe later. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a cross-sectional view of the structure of the bottom frame, condenser, and evaporator of the present invention;

[0027] Figure 3 This is a cross-sectional view of the evaporator structure of the present invention;

[0028] Figure 4 For the present invention Figure 3 A magnified view of a section at point A in the middle;

[0029] Figure 5 This is a schematic diagram of the air-barrier structure of the present invention;

[0030] Figure 6 This is a cross-sectional view of the air-collecting frame structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the slide bar, fourth gas plug, and spring structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the connecting ring, support rod, pulley, and insulation pad structure of the present invention;

[0033] Figure 9 This is a schematic diagram of the thermal insulation mechanism structure of the present invention;

[0034] Figure 10 This is a cross-sectional view of the condenser structure of the present invention.

[0035] In the diagram: 1. Base frame; 2. Evaporation mechanism; 3. Condensation mechanism; 4. Insulation mechanism; 5. First material pipe; 6. Feed pump; 7. Drain pipe; 8. Solenoid valve; 9. Compressor; 10. Venting pipe; 11. Injection pipe; 12. Branch pipe; 13. Rear plate; 201. Evaporator; 202. Vacuum baffle; 203. External heat exchanger pipe; 204. Gas collection frame; 205. Vent hole; 206. Slide rod; 207. First steam plug; 208. Second steam plug; 209. Third steam plug; 210. Fourth steam plug; 211. Fifth steam plug; 212. Inlet slot; 213. Outlet slot; 214. Float plate; 215. Spring; 21 6. Gas delivery frame; 217. Impact plate; 218. Internal heat exchanger tube; 219. First insulation pipe; 220. Gas outlet branch pipe; 301. Condenser; 302. Curved feed pipe; 303. Gas-liquid separator; 304. Gas guide pipe; 305. Second insulation pipe; 306. First threaded sleeve; 307. Second threaded sleeve; 308. Turn handle; 401. Right-angle connecting pipe; 402. Connecting ring; 403. Support rod; 404. Pulley; 405. Insulation pad; 406. Shrink ring; 407. Sliding groove; 408. Slide seat; 409. Fixing frame; 410. Rocker arm; 411. Take-up reel; 412. Steel cable; 413. Guide wheel. Implementation

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Please see Figure 1-10The present invention provides a technical solution: an integrated falling film evaporator, including a bottom frame 1, an evaporation mechanism 2 fixedly installed on the left side of the top of the bottom frame 1, a condensation mechanism 3 fixedly installed on the right side of the top of the bottom frame 1, a rear plate 13 fixedly connected to the rear of the bottom frame 1 through a fixing plate, and a heat preservation mechanism 4 fixedly connected to the top of the rear plate 13.

[0038] In a preferred embodiment, to improve vaporization efficiency while preventing viscous liquid blockage, the evaporation mechanism 2 includes an evaporator 201. The evaporator 201 is fixedly connected to the surface of the rear plate 13 via a bracket and is located at the top of the bottom frame 1. A baffle plate 202 is fixedly connected to the upper part of the inner wall of the evaporator 201. An external heat exchange tube 203 is fixedly connected to the top of the baffle plate 202 through an opening. Several external heat exchange tubes 203 are arranged in a ring at equal intervals. A gas collection frame 204 is fixedly connected to the lower part of the inner wall of the evaporator 201. Ventilation holes 205 are provided at the top and bottom of both the baffle plate 202 and the gas collection frame 204. The inner side of the ventilation holes 205 is slidably installed. A slide rod 206 is provided. A first steam plug 207 and a second steam plug 208, which cooperate with the air baffle 202, are fixedly installed on the surface of the slide rod 206 at the top and bottom of the air baffle 202, respectively. A third steam plug 209 and a fourth steam plug 210, which cooperate with the air collection frame 204, are fixedly installed on the lower part of the surface of the slide rod 206 at the upper and lower parts of the air baffle 202 and the air collection frame 204, respectively. An air inlet groove 212 and an air outlet groove 213 are provided on the upper and lower parts of the surface of the slide rod 206 at the upper part of the air baffle 202 and the lower part of the air collection frame 204, respectively. A float plate 214, made of magnesium-aluminum alloy, is fixedly connected to the top of the first steam plug 207. A spring 215, made of high-temperature resistant spring steel, is fixedly connected to the top of the evaporator 201. A gas delivery frame 216 is fixedly connected to the upper part of the inner wall of the evaporator 201, and the top of the spring 215 is fixedly connected to the bottom of the gas delivery frame 216. An impact plate 217 is fixedly connected to the top of the third steam plug 209. An inner heat exchange tube 218 is fixedly connected to the bottom of the gas delivery frame 216 through an opening. Several inner heat exchange tubes 218 are provided. The bottom end of the inner heat exchange tube 218 passes through the outer heat exchange tube 203, the impact plate 217, and the gas collection frame 204 in sequence and extends into the interior of the gas collection frame 204. A first insulation tube 219 is fixedly connected to the left side of the evaporator 201 through an opening. The right end of the heat pipe 219 passes through the evaporator 201 and extends to the right side of the evaporator 201. The right side of the gas collection frame 204 is connected to the gas outlet branch pipe 220, and one end of the gas outlet branch pipe 220 passes through the evaporator 201 and is connected to the top of the first heat insulation pipe 219. The left side of the first heat insulation pipe 219 is fixedly connected to the first material pipe 5 through an opening, and the right end of the first material pipe 5 extends to the inside of the first heat insulation pipe 219. The left side of the top of the bottom frame 1 is fixedly connected to the liquid pump 6 through an opening. The outlet of the liquid pump 6 is fixedly connected to the injection pipe 11. The top end of the injection pipe 11 passes through the evaporator 201 and the gas delivery frame 216 in sequence and extends into the interior of the evaporator 201.

[0039] In a preferred embodiment, to improve the steam condensation rate, the condensing mechanism 3 includes a condenser 301. The condenser 301 is fixedly connected to the rear plate 13 via a bracket and is located at the top of the bottom frame 1. A second threaded sleeve 307, which mates with the first insulation pipe 219, is fixedly connected to the right side of the condenser 301 through an opening. A curved feed pipe 302 is provided between the two sides of the inner cavity of the condenser 301. The right end of the curved feed pipe 302 passes through the condenser 301 and the bottom frame 1 sequentially and is fixedly connected to the inlet of the feed pump 6. The left end of the curved feed pipe 302 is threadedly connected to a first threaded sleeve 306, which mates with the first material pipe 5. The left side of the second insulation pipe 305 is threadedly connected to a sleeve that mates with the first insulation pipe 219. The second threaded sleeve 307 has a handle 308 fixedly connected to its surface. A gas-liquid separator 303 is fixedly connected to the upper part of the inner wall of the condenser tank 301. A compressor 9 is fixedly connected to the right side of the top of the bottom frame 1 through an opening. A guide pipe 304 is fixedly connected to the air inlet of the compressor 9, and one end of the guide pipe 304 passes through the condenser tank 301 and extends into the interior of the condenser tank 301. A vent pipe 10 is fixedly connected to the air outlet of the compressor 9. One end of the vent pipe 10 passes through the evaporator tank 201 and the gas delivery frame 216 in sequence and extends into the interior of the gas delivery frame 216. A branch pipe 12 is connected to the left side of the bottom of the vent pipe 10, and one end of the branch pipe 12 passes through the evaporator tank 201 and extends into the interior of the evaporator tank 201.

[0040] In a preferred embodiment, in order to facilitate the extraction of condensate for secondary evaporation, both the bottom of the evaporator 201 and the condenser 301 are fixedly connected to a drain pipe 7 by openings, and the lower end of the drain pipe 7 passes through the bottom frame 1 and connects to the top of the curved feed pipe 302. Solenoid valves 8 are fixedly installed on the surface of both the drain pipe 7 and the condenser 301.

[0041] In a preferred embodiment, to insulate the vent pipe 10 and prevent heat loss, the insulation mechanism 4 includes a right-angle connecting pipe 401, which is fixedly installed on the surface of the vent pipe 10. Connecting rings 402 are fixedly connected to both ends of the right-angle connecting pipe 401, and the connecting rings 402 are sleeved on the surface of the vent pipe 10. Several connecting rings 402 are provided, and insulation pads 405 are fixedly connected between the connecting rings 402. A support rod 403 is fixedly connected in a ring shape to the inner side of the connecting ring 402, and a pulley 404 is rotatably installed on the end of the support rod 403 near the vent pipe 10. The upper left side of the connecting ring 402... A shrink ring 406 is fixedly connected to the left side of the rear plate 13. A sliding groove 407 is provided on the top of the rear plate 13. A slide block 408 is slidably installed inside the sliding groove 407. The slide block 408 and the shrink ring 406 are fixedly connected by a bracket. Fixed frames 409 are fixedly installed on both sides of the rear plate 13. A rocker arm 410 is rotatably connected to the front side of the inner cavity of the fixed frame 409. A take-up wheel 411 is fixedly connected to the surface of the rocker arm 410. A steel cable 412 is provided between the two take-up wheels 411 and passes through the slide block 408. Guide wheels 413 are installed on both sides of the bottom of the inner cavity of the rear plate 13, and the top of the guide wheel 413 is in contact with the steel cable 412.

[0042] This invention also discloses a process for using an integrated falling film evaporator, specifically including the following steps:

[0043] S1. Before starting work, rotate the first threaded sleeve 306 and the second threaded sleeve 307 to connect the second insulation pipe 305, the curved material pipe 302, the first insulation pipe 219, and the first material pipe 5. Then, connect the left end of the first material pipe 5 with the liquid source and manually rotate the left rocker 410 to wind up the steel cable 412 so that the slide 408 moves by pulling the shrink ring 406 and the insulation pad 405 through the bracket, thereby covering the surface of the venting pipe 10. The pulley 404 and the support rod 403 on the inner side of the connecting ring 402 can support the connecting ring 402 and slide it. After completing the preparation work, the evaporation process is carried out.

[0044] S2. During the evaporation process, the feed pump 6 and compressor 9 are started simultaneously. Then, the solenoid valve 8 on the surface of the curved feed pipe 302 is opened. At this time, the low-temperature feed liquid enters the feed pump 6 through the first feed pipe 5 and the curved feed pipe 302. The feed pump 6 uses its own pressure to draw the feed liquid and inject it into the interior of the evaporator 201. At the same time, the initial steam is compressed by the compressor 9 and enters the inner side of the vent pipe 10. After the feed liquid enters the evaporator 201, it falls on the top of the baffle plate 202 and then flows evenly into the inner side of the external heat exchange pipe 203 in a film-like downward flow. At this time, the high-temperature steam inside the vent pipe 10 is split through the branch pipe 12. Steam is injected into the interior of the gas delivery frame 216 at one end. The steam is split inside the gas delivery frame 216 and enters the inner heat exchange tube 218 respectively. At this time, the liquid inside the outer heat exchange tube 203 is heated by both the inner and outer layers, which improves the evaporation efficiency. Meanwhile, the slide bar 206 is in a state where the tension of the spring 215 is equal to the weight of the gas delivery frame 216 and cancels each other out. When the gas-liquid mixture inside the outer heat exchange tube 203 flows out and impacts the impact plate 217, the impact plate 217 and the slide bar 206 increase in weight. The first steam plug 207 blocks the upper vent hole 205, and the third steam plug 209 and the fourth steam plug 210 block the lower vent hole 205.

[0045] When the liquid flowing inside the external heat exchanger tube 203 is a highly viscous material, the high internal temperature of the tube causes it to become viscous and clog the tube, making it difficult for the liquid to flow down. At this point, the impact plate 217 loses its impact force, and the slide rod 206 and spring 215 regain their equilibrium. Due to the blockage in the external heat exchanger tube 203, the liquid inside the slide rod 206 accumulates. As the accumulated liquid rises, the buoyancy of the float plate 214 combined with the tension of the spring 215 causes the upward force to exceed the weight of the gas delivery frame 216. The gas delivery frame 216 is then lifted, and the inlet slot 212 and outlet slot 213 enter the interior of the gas accumulation frame 204 and the upper part of the baffle plate 202, respectively. Simultaneously, the second steam plug 208, the fifth steam plug 211, and the fourth steam plug 210 again block the upper and lower vent holes 205, allowing high-pressure steam to flow through. The steam enters the upper space of the baffle plate 202 through the sliding rod 206, the air inlet groove 212, and the air outlet groove 213. As the amount of steam entering increases, the pressure in the upper space also increases, which pushes the liquid downward, thereby causing the viscous liquid inside the external heat exchange tube 203 to be pushed out of the external heat exchange tube 203. When the external heat exchange tube 203 is unblocked, the liquid impacts the impact plate 217 again, causing the sliding rod 206 to descend and cut off the steam from entering the upper space. When the steam falls to the bottom of the evaporator 201, it condenses into liquid and finally enters the interior of the first insulation tube 219 to contact the low-temperature first material tube 5, increasing the condensation efficiency. At the same time, it preheats the liquid inside. When too much condensate accumulates, it can submerge the first material tube 5, increasing the preheating effect. The steam inside the gas collection frame 204 enters the first insulation tube 219 through the air outlet branch pipe 220 for the next process.

[0046] S3. After the evaporation process is completed, the steam and liquid feed enter the condenser 301 through the second insulation pipe 305 and the curved feed pipe 302, respectively. The liquid feed delays its residence time in the high-temperature environment inside the condenser 301 through the curved feed pipe 302, while the steam, after re-condensation, finally passes through the gas-liquid separator 303 and returns to the compressor 9 through the gas guide pipe 304 for mechanical compression and reuse. Then, it re-enters the condenser 301 through the vent pipe 10. The preheated liquid feeds through the curved feed pipe 302 and the first material pipe... 5. The liquid continuously enters the condenser 301 for evaporation. The function of the drain pipe 7 and the solenoid valve 8 is to allow the liquid to be pumped back into the condenser 301 for secondary evaporation if the evaporation is not up to standard. The insulation pad 405 is set to keep the vent pipe 10 warm. The insulation pad 405 can be pulled open for easy inspection. After the work is completed, the second threaded sleeve 307 is unscrewed from the first threaded sleeve 306 to clean the curved material pipe 302, the first material pipe 5, the first insulation pipe 219 and the second threaded sleeve 307.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated falling film evaporator, comprising a base frame (1), characterized in that: An evaporation mechanism (2) is fixedly installed on the left side of the top of the bottom frame (1), a condensation mechanism (3) is fixedly installed on the right side of the top of the bottom frame (1), a rear plate (13) is fixedly connected to the rear of the bottom frame (1) through a fixing plate, and a heat preservation mechanism (4) is fixedly connected to the top of the rear plate (13). The evaporation mechanism (2) includes an evaporator (201), which is fixedly connected to the surface of the rear plate (13) via a bracket and located at the top of the bottom frame (1). A baffle plate (202) is fixedly connected to the upper part of the inner wall of the evaporator (201). An external heat exchange tube (203) is fixedly connected to the top of the baffle plate (202) through an opening. Several external heat exchange tubes (203) are arranged in a ring at equal intervals. A gas collection frame (204) is fixedly connected to the lower part of the inner wall of the evaporator (201). The baffle plate (202) and the gas collection frame (204) are connected together. 4) Both the top and bottom are provided with ventilation holes (205). A slide rod (206) is slidably installed on the inner side of the ventilation hole (205). The first gas plug (207) and the second gas plug (208) that cooperate with the air baffle (202) are fixedly installed on the surface of the slide rod (206) at the top and bottom of the air baffle (202). The third gas plug (209) and the fourth gas plug (210) that cooperate with the air baffle (204) are fixedly installed on the lower part of the surface of the slide rod (206) at the upper and lower parts of the air accumulator (204). The upper and lower parts of the slide bar (206) are respectively located on the upper part of the air baffle plate (202) and the lower part of the gas collection frame (204) and have an air inlet groove (212) and an air outlet groove (213). The top of the first gas plug (207) is fixedly connected to a float plate (214), and the top of the float plate (214) is fixedly connected to a spring (215). The upper part of the inner wall of the evaporator (201) is fixedly connected to a gas delivery frame (216), and the top of the spring (215) is fixedly connected to the bottom of the gas delivery frame (216). The top of the third gas plug (209) is fixedly connected to an impact plate (217), and the bottom of the gas delivery frame (216) is fixedly connected to an inner gas delivery frame (216) through an opening. A heat exchange tube (218) is provided, and several inner heat exchange tubes (218) are provided. The bottom end of the inner heat exchange tube (218) passes through the outer heat exchange tube (203), the impact plate (217) and the gas collection frame (204) in sequence and extends into the interior of the gas collection frame (204). The left side of the evaporator (201) is fixedly connected to the first heat insulation tube (219) by opening. The right end of the first heat insulation tube (219) passes through the evaporator (201) and extends to the right side of the evaporator (201). The right side of the gas collection frame (204) is connected to the gas outlet branch pipe (220). One end of the gas outlet branch pipe (220) passes through the evaporator (201) and is connected to the top of the first heat insulation tube (219). The first insulation pipe (219) is fixedly connected to the first material pipe (5) through an opening on the left side, and the right end of the first material pipe (5) extends to the inside of the first insulation pipe (219). The bottom frame (1) is fixedly connected to the liquid pump (6) through an opening on the left side of the top. The liquid pump (6) is fixedly connected to the injection pipe (11) at the outlet. The top end of the injection pipe (11) passes through the evaporator (201) and the gas transmission frame (216) in sequence and extends into the interior of the evaporator (201). The bottom of the evaporator (201) and the condenser (301) are both fixedly connected to a drain pipe (7) through an opening. The lower end of the drain pipe (7) passes through the bottom frame (1) and connects to the top of the curved material pipe (302). Solenoid valves (8) are fixedly installed on the surface of the drain pipe (7) and the condenser (301). The heat preservation mechanism (4) includes a right-angle connecting pipe (401), which is fixedly installed on the surface of the venting pipe (10). Both ends of the right-angle connecting pipe (401) are fixedly connected to connecting rings (402), and the connecting rings (402) are sleeved on the surface of the venting pipe (10). There are several connecting rings (402), and heat preservation pads (405) are fixedly connected between several connecting rings (402). The inner side of the connecting ring (402) is fixedly connected to a support rod (403) in a ring shape, and a pulley (404) is rotatably installed on one end of the support rod (403) near the venting pipe (10).

2. The integrated falling film evaporator according to claim 1, characterized in that: The condensation mechanism (3) includes a condenser tank (301), which is fixedly connected to the rear plate (13) via a bracket and located at the top of the bottom frame (1). A second threaded sleeve (307) for use with the first insulation pipe (219) is fixedly connected to the right side of the condenser tank (301) through an opening. A curved material pipe (302) is provided between the two sides of the inner cavity of the condenser tank (301), and the right end of the curved material pipe (302) passes through the condenser tank (301) and the bottom frame (1) sequentially. 1) It is fixedly connected to the inlet of the liquid pump (6). The left end of the curved material pipe (302) is threaded with a first threaded sleeve (306) that is used in conjunction with the first material pipe (5). The left side of the second insulation pipe (305) is threaded with a second threaded sleeve (307) that is used in conjunction with the first insulation pipe (219). A handle (308) is fixedly connected to the surface of the second threaded sleeve (307). A gas-liquid separator (303) is fixedly connected to the upper part of the inner wall of the condenser (301).

3. The integrated falling film evaporator according to claim 2, characterized in that: A compressor (9) is fixedly connected to the top right side of the bottom frame (1) through an opening. The air inlet of the compressor (9) is fixedly connected to a guide pipe (304), and one end of the guide pipe (304) passes through the condenser (301) and extends into the interior of the condenser (301). The air outlet of the compressor (9) is fixedly connected to a vent pipe (10). One end of the vent pipe (10) passes through the evaporator (201) and the gas delivery frame (216) in sequence and extends into the interior of the gas delivery frame (216). A branch pipe (12) is connected to the left side of the bottom of the vent pipe (10), and one end of the branch pipe (12) passes through the evaporator (201) and extends into the interior of the evaporator (201).

4. The integrated falling film evaporator according to claim 3, characterized in that: A shrink ring (406) is fixedly connected to the left side of the connecting ring (402) on the upper left side. A sliding groove (407) is provided on the top of the rear plate (13). A slide block (408) is slidably installed inside the sliding groove (407). The slide block (408) and the shrink ring (406) are fixedly connected by a bracket. A fixing frame (409) is fixedly installed on both sides of the rear plate (13). A rocker arm (410) is rotatably connected to the front side of the inner cavity of the fixing frame (409). A take-up wheel (411) is fixedly connected to the surface of the rocker arm (410). A steel cable (412) is provided between the two take-up wheels (411), and the steel cable (412) passes through the slide block (408). Guide wheels (413) are installed on both sides of the bottom of the inner cavity of the rear plate (13), and the top of the guide wheel (413) is in contact with the steel cable (412).

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