A falling film evaporator with a vapor-liquid two-phase separation guide structure

Abstract

The present invention discloses a falling film evaporator with a vapor-liquid two-phase separation guide structure, belonging to the technical field of falling film evaporators. The present invention comprises a falling film evaporator cylinder, a gas injection cylinder cover is arranged on the top of the falling film evaporator cylinder, and a partition seat is arranged on the bottom of the falling film evaporator cylinder, a switching mechanism is arranged on the top of the gas injection cylinder cover, the switching mechanism comprises a lower kit, an upper cover and a support frame, and a micromotor and a water spray brush plate are arranged on the end face of the support frame; the present invention can not only form an overall intelligent control operation process of the falling film evaporator through system data analysis and mechanical linkage coordination, use the switching mechanism to coordinate and analyze the generated signal, quickly replace the distributor with abnormalities, reduce the overall device replacement downtime loss, and complete the quick cleaning of the distributor, but also guide the raw material hot gas to swirl in the diversion cylinder through the baffle plate to promote vapor-liquid two-phase diversion to solve the proposed problem.

Description

Technical Field

[0001] The invention relates to the technical field of falling film evaporators, in particular to a falling film evaporator with a vapor-liquid two-phase separation and guiding structure. Background Art

[0002] Falling film evaporator is widely used in the evaporation and concentration of water or organic solvents in the pharmaceutical, food, chemical, light industry and other industries. It can also be used for waste liquid treatment in these industries. It is especially suitable for heat-sensitive materials. It can operate continuously under vacuum and low temperature conditions. It has the advantages of high evaporation capacity, energy saving and consumption reduction, and low operating costs. It can also ensure that the material does not change during the evaporation process. The evaporation effect of the evaporator is directly related to the distributor. If the distributor cannot evenly distribute the liquid to each heat exchange tube and form a good liquid film, it will affect the performance of the evaporator.

[0003] In combination with the above content, it should be explained that during the use of the traditional falling film evaporator, the raw material liquid is affected by the raw material liquid and the distributor, resulting in uneven distribution of the raw material liquid, which leads to local accumulation and overflow of the raw material liquid, retention, drying and adhesion of the raw material liquid during the subsequent use of the falling film evaporator. At the same time, under the influence of the weight of the raw material liquid, the negative pressure suction of the external equipment and the pushing of the gas pressure accompanying the feeding, it is easy to cause the residual raw material liquid to collide with the return liquid cylinder after passing through the heat exchange tube, resulting in sputtering and affecting the raw material hot gas;

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The object of the present invention is to provide a falling film evaporator with a vapor-liquid two-phase separation guide structure, which collects data of the falling film evaporator during use, and comprehensively monitors and analyzes the use process of the falling film evaporator before and during fall prevention, compares and analyzes the collected data with preset stored data, obtains relevant rating signals, and controls relevant components to perform compensatory operations accordingly;

[0006] Therefore, it is possible to form an intelligent control operation process of the falling film evaporator through the system data analysis and mechanical linkage, and use the exchange mechanism to analyze the generated signal to quickly replace the abnormal distributor, reduce the loss of overall device replacement and downtime, and complete the quick cleaning of the distributor. The residual raw material flowing film liquid after heat treatment can be subjected to secondary heat treatment and anti-sputtering treatment through the drop barrel, and the raw material hot gas can be guided to swirl in the diversion barrel through the baffle plate to promote the gas-liquid two-phase diversion, so as to solve the problems raised.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a falling film evaporator with a vapor-liquid two-phase separation guide structure, comprising a falling film evaporation cylinder, a gas injection cylinder cover is arranged on the top of the falling film evaporation cylinder, and a partition seat is arranged on the bottom of the falling film evaporation cylinder, a switching mechanism is arranged on the top of the gas injection cylinder cover, the switching mechanism comprises a lower kit, an upper cover and a support frame, a micromotor and a water spray brush plate are arranged on the end surface of the support frame, a control panel is arranged on the outer side of the falling film evaporation cylinder, and a liquid return cylinder is arranged at the bottom of the partition seat;

[0008] A ring frame and a dropper are arranged inside the liquid return cylinder, a flow divider is arranged side by side on the outer periphery of the liquid return cylinder, a baffle is arranged inside the flow divider, and an air distributor is arranged on the surface of the baffle.

[0009] Furthermore, a plurality of groups of heat exchange tubes are arranged inside the falling film evaporator tube, and an outer cone head is arranged on the top of the heat exchange tube, an inner cone head is arranged on the inner wall of the outer cone head, and a guide plate is arranged on the outer periphery of the outer cone head, and a guide groove is arranged in the groove on the surface of the guide plate, a steam outlet pipe and a condensate outlet pipe are arranged through the bottom wall of the falling film evaporator tube, and a card cover connected to the partition seat is arranged at the bottom of the falling film evaporator tube.

[0010] Furthermore, a docking tube is provided through the outer wall of the gas injection cylinder cover, a ring sleeve is provided on the top of the gas injection cylinder cover, and the bottom of the lower sleeve is connected to the ring sleeve, an injection pipe is provided on the top of the upper cover, an upper sleeve adapted to the lower sleeve is provided in the middle of the support frame, and pushing cylinders are provided on the inner walls on both sides of the support frame, and distributors are provided between the pushing cylinders.

[0011] Furthermore, upper covers are symmetrically arranged at the top of both ends of the support frame, and lower covers are symmetrically arranged at the bottom of both ends of the support frame, multiple groups of micromotors are respectively embedded in the center of the upper cover and the lower cover, and a telescopic cylinder connected to a water spray brush plate is arranged at the output end of the micromotor, a clean water outlet is arranged at the top of the upper cover, and a drain outlet is arranged at the bottom of the lower cover.

[0012] Furthermore, a material collection seat is provided at the bottom of the liquid return cylinder, a liquid discharge pipe is provided through the middle of the material collection seat, the ring frame is connected to the inner wall of the bottom of the liquid return cylinder, and the drop barrels are arranged in a circular array on the surface of the ring frame, a cross is provided at the center of the inside of the drop barrel, a needle is provided on the top of the cross, and a guide rod is provided at the bottom of the cross, and a steam discharge pipe connected to the diversion cylinder is provided on the top wall of the liquid return cylinder.

[0013] Furthermore, an air inlet connected to a steam exhaust pipe is provided on the middle outer wall of the diverter tube, a second liquid discharge pipe is provided at the bottom of the diverter tube, an air exhaust port is provided at the top of the diverter tube, an arc groove is provided on the surface of the baffle plate, and a plurality of groups of convex columns are provided on the edges of both ends of the arc groove.

[0014] Furthermore, the control panel is internally provided with a processor, a current sharing data acquisition module, a data operation analysis module and a component control module;

[0015] The flow-averaging data acquisition module is used to collect the porous film discharge fluctuation value DKz located on the falling film evaporation cylinder and the input-discharge comparison value LLz located on the liquid return cylinder during the use of the falling film evaporator, and send the porous film discharge fluctuation value DKz and the input-discharge comparison value LLz to the data operation analysis module via the processor;

[0016] After receiving the porous film discharge fluctuation value DKz and the input and output comparison value LLz, the data operation analysis module immediately analyzes the blockage risk of the falling film evaporator. The specific analysis process is as follows: the porous film discharge fluctuation value DKz and the input and output comparison value LLz of the falling film evaporator within the time threshold are obtained, and the blockage risk coefficient Di is obtained by the formula, and the preset blockage risk coefficient Yi stored and entered is retrieved from the processor for comparison and analysis with the blockage risk coefficient Di; if the blockage risk coefficient Di ≥ the preset blockage risk coefficient Yi, it is determined that there is an abnormal risk in the use of the falling film evaporator within the time threshold, and a cleaning signal is generated. The generated signal is sent to the signal execution module via the processor. After receiving the cleaning signal, the signal execution module immediately starts the micromotor to work; if the blockage risk coefficient Di < the preset blockage risk coefficient Yi, no signal is generated.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention collects data of the falling film evaporator during use, and comprehensively monitors and analyzes the use process of the falling film evaporator before and during anti-falling, compares and analyzes the collected data with the preset stored data, obtains relevant rating signals, and controls relevant components to perform compensatory operations accordingly. Therefore, the overall falling film evaporator intelligent control operation process can be formed through the linkage of system data analysis and machinery, and the abnormal distributor can be quickly replaced by using the exchange mechanism to cooperate with the analysis of the generated signal, thereby reducing the loss of downtime for the overall device to be replaced, and completing the quick cleaning of the distributor. In addition, the residual raw material flow film layer liquid after heat treatment can be subjected to secondary heat treatment and anti-sputtering treatment through the falling barrel, and the raw material hot gas can be guided to swirl in the diverter barrel through the baffle plate to promote the gas-liquid two-phase diversion;

[0019] 2. The present invention also uses a guide plate and an inner cone head in conjunction with an outer cone head to improve the uniform distribution of the raw materials guided by the distributor on the inner wall of the heat exchange tube, promote the rapid formation of a raw material flow film layer, and is beneficial to the thermal evaporation treatment efficiency of the raw material flow film layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0021] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of the falling film evaporation cylinder of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the outer cone head and the inner cone head of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the liquid return cylinder of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the drop barrel of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the diverter tube of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the spoiler of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the switching mechanism of the present invention;

[0029] Fig. 9 It is a schematic diagram of a partially unfolded structure of the support frame of the present invention;

[0030] Fig.10 It is a flow chart of the system of the present invention.

[0031] Figure numerals: 1, falling film evaporation cylinder; 101, heat exchange tube; 102, guide plate; 103, guide groove; 104, outer cone head; 105, steam outlet pipe; 106, condensate outlet pipe; 107, card cover; 108, partition seat; 109, inner cone head; 2, liquid return cylinder; 201, material collection seat; 202, ring frame; 203, drop cylinder; 204, drain pipe 1; 205, steam drain pipe; 206, needle; 207, cross; 208, guide rod; 3, diverter cylinder; 301, air inlet; 302, drain pipe 2 ; 303, baffle; 304, air outlet; 305, air distributor; 306, arc groove; 307, boss; 4, air injection cylinder cover; 401, docking tube; 402, ring sleeve; 5, replacement mechanism; 501, lower kit; 502, upper cover; 503, support frame; 504, liquid injection pipe; 505, upper cover plate; 506, clean water outlet; 507, micromotor; 508, lower cover plate; 509, telescopic cylinder; 510, water spray brush plate; 511, push cylinder; 512, distributor; 513, drain outlet. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0033] Embodiment 1: This embodiment is used to solve the problem that during the use of the traditional falling film evaporator, the raw material liquid is affected by the raw material liquid and the distributor, resulting in uneven distribution of the raw material liquid, which leads to local accumulation and overflow of the raw material liquid and retention, drying and adhesion of the raw material liquid during the subsequent use of the falling film evaporator.

[0034] See also Figure 1 - Figure 5 As shown, this embodiment is a falling film evaporator with a vapor-liquid two-phase separation guide structure, comprising a falling film evaporation cylinder 1, a gas injection cylinder cover 4 is arranged on the top of the falling film evaporation cylinder 1, and a partition seat 108 is arranged at the bottom of the falling film evaporation cylinder 1, and a replacement mechanism 5 is arranged on the top of the gas injection cylinder cover 4;

[0035] The exchange mechanism 5 includes a lower set 501, an upper cover 502 and a support frame 503. The end surface of the support frame 503 is provided with a micro motor 507 and a water spray brush plate 510. A control panel is provided on the outer side of the falling film evaporation cylinder 1. A liquid return cylinder 2 is provided at the bottom of the partition seat 108.

[0036] A ring frame 202 and a dropper barrel 203 are arranged inside the liquid return barrel 2, a diverter barrel 3 is arranged side by side on the outer periphery of the liquid return barrel 2, a baffle plate 303 is arranged inside the diverter barrel 3, and a gas distributor plate 305 is arranged on the surface of the baffle plate 303. The raw material is injected into the falling film evaporator along the injection pipe 504 through an external feed pipeline, and the external steam supply equipment connects the butt pipe 401, the steam outlet pipe 105 and the condensate outlet pipe 106 through pipe fittings to realize the flow circulation trajectory of steam from top to bottom inside the falling film evaporator. The liquid return barrel 2 and the diverter barrel 3 are connected to the external raw material liquid recovery equipment through the drain pipe 1 204 and the drain pipe 2 302, and the diverter barrel 3 is connected to the raw material steam recovery equipment through the gas outlet 304;

[0037] The control panel is internally provided with a processor, a flow-averaging data acquisition module, a data operation analysis module and a component control module; the flow-averaging data acquisition module is used to collect the porous film discharge fluctuation value DKz located on the falling film evaporation cylinder 1 and the input-output comparison value LLz located on the liquid return cylinder 2 during the use of the falling film evaporator, and send the porous film discharge fluctuation value DKz and the input-output comparison value LLz to the data operation analysis module via the processor; 3h during the use of the falling film evaporator is set as the time threshold;

[0038] It should be noted that: the porous film discharge fluctuation value DKz is expressed as the amount of residual material on the inner wall of each group of heat exchange tubes 101 that enters the liquid return cylinder 2 after heat treatment, and the difference between the maximum and minimum values ​​is obtained after the data between each group of heat exchange tubes 101 are collected. The larger the value of the porous film discharge fluctuation value DKz, the more it indicates that the distributor has uneven distribution and diversion of the raw material. The input and output amount comparison value LLz is expressed as the difference between the sum of the amount of raw material injected into the injection pipe 504 and the amount of air entering within the time threshold and the sum of the residual amount of raw material flow film liquid and the amount of raw material hot gas entering the liquid return cylinder 2. In addition, the porous film discharge fluctuation value DKz is collected by the metering sensor 1 installed at the bottom of the partition 108, and the input and output amount comparison value LLz is collected by the metering sensor 2 installed in the injection pipe 504 and the liquid return cylinder 2.

[0039] After receiving the porous film discharge fluctuation value DKz and the input and output comparison value LLz, the data operation analysis module immediately analyzes the blockage risk of the falling film evaporator. The specific analysis process is as follows:

[0040] The porous film discharge fluctuation value DKz and the input and output ratio value LLz of the falling film evaporator within the time threshold are obtained, and the formula Obtain the blocking risk coefficient Di, where a and b are the proportional coefficients of the porous film discharge fluctuation value DKz and the input and output comparison value LLz, respectively, a>b>0, Di is expressed as the blocking risk coefficient, and the preset blocking risk coefficient Yi stored in the processor is retrieved for comparison and analysis with the blocking risk coefficient Di;

[0041] If the blocking risk coefficient Di ≥ the preset blocking risk coefficient Yi, it is determined that there is an abnormal risk in the use of the falling film evaporator within the time threshold, and a cleaning signal is generated. The generated signal is sent to the signal execution module through the processor. After receiving the cleaning signal, the processor immediately generates a "sequence n / diversion abnormality / cleaning plan execution" style text and sends it to the display screen of the main control room to remind the supervisor in the main control room. After receiving the cleaning signal, the signal execution module immediately controls the micromotor 507 to work;

[0042] The external feeding device stops feeding for a short time, and pushes the cylinder 511 to drive a group of distributors 512 to move horizontally between the upper cover plate 505 and the lower cover plate 508 near one end, while another group of distributors 512 is pulled to move above the guide plate 102 to replace the distributors 512 waiting to be cleaned. The external device guides the condensed water collected by the condensed water outlet pipe 106 into the clean water port 506 through the pipeline, and the clean water port 506 guides the condensed water into the water spray brush plate 510 through the pipe fittings;

[0043] The telescopic cylinder 509 drives the multiple groups of water-spraying brush discs 510 to approach each other until they contact the upper and lower surfaces of the distributor 512. The micro-motor 507 drives the water-spraying brush discs 510 to rotate and scrub the surface of the distributor 512. After the cleaning is completed, the water-spraying brush discs 510 are pulled away from the distributor 512 by the telescopic cylinder 509, and the waste water generated by the cleaning is collected on the inner wall at the bottom of the lower cover plate 508 and is discharged outwardly through the drain port 513.

[0044] If the congestion risk coefficient Di is less than the preset congestion risk coefficient Yi, no signal is generated.

[0045] Embodiment 2: This embodiment is a falling film evaporator with a vapor-liquid two-phase separation guide structure, which is used to solve the problem that the residual raw material liquid is easily caused to collide with the liquid return cylinder after passing through the heat exchange tube under the influence of the forces such as the weight of the raw material liquid, the negative pressure suction of the external equipment and the pushing of the gas pressure accompanying the feeding, thereby causing sputtering and affecting the raw material hot gas;

[0046] It also includes a falling film evaporation tube 1 having multiple groups of heat exchange tubes 101 arranged inside, and an outer cone head 104 is arranged on the top of the heat exchange tube 101, an inner cone head 109 is arranged on the inner wall of the outer cone head 104, and a guide plate 102 is arranged on the outer periphery of the outer cone head 104, and a guide groove 103 is arranged in the groove on the surface of the guide plate 102, a steam outlet pipe 105 and a condensate outlet pipe 106 are penetrated on the bottom wall of the falling film evaporation tube 1, and a card cover 107 connected to the partition seat 108 is arranged at the bottom of the falling film evaporation tube 1;

[0047] The raw material is guided by the injection pipe 504 and collected on the distributor 512. The groove on the distributor 512 diverts the raw material and evenly leaks and guides it to drip onto the inner wall of the top of the outer cone head 104. The guide plate 102 cooperates with the outer cone head 104 to limit the dripping raw material to prevent it from spreading and accumulating. When the raw material slides along the inner wall of the outer cone head 104, it is affected by the gap between the inner cone head 109 and the outer cone head 104, so that the raw material slides evenly along the gap between the two into the heat exchange tube 101. The injected air enters the heat exchange tube 101 through the hole in the middle of the inner cone head 109, so that the raw material quickly forms a raw material flow film layer on the inner wall of the heat exchange tube 101, and it continues to flow down along the inner wall of the heat exchange tube 101. Two groups of upper and lower metal thin brackets are fixedly arranged in the middle of the inner wall of the outer cone head 104, and the metal thin brackets are abutted against the middle of the outer wall of the inner cone head 109. Each group of metal thin brackets is arranged in a triangular structure by three groups of frames.

[0048] Affected by the high temperature inside the falling film evaporator cylinder 1, part of the raw material flow film layer on the inner wall of the heat exchange tube 101 is caused to evaporate quickly, and the raw material hot vapor is obtained. With the continuous sliding of the raw material flow film layer, the suction negative pressure of the raw material steam recovery equipment and the air pressure of the external feeding equipment, the raw material hot gas and the unevaporated raw material flow film layer enter the liquid return cylinder 2 along the heat exchange tube 101 and the partition seat 108. The surface of the partition seat 108 is penetrated with holes adapted to the heat exchange tube 101.

[0049] A butt joint pipe 401 is provided through the outer wall of the gas injection cylinder cover 4, a ring sleeve 402 is provided on the top of the gas injection cylinder cover 4, and the bottom of the lower cover 501 is connected to the ring sleeve 402, and a liquid injection pipe 504 is provided on the top of the upper cover 502, and an upper cover adapted to the lower cover 501 is provided in the middle of the support frame 503, and pushing cylinders 511 are provided on the inner walls of both sides of the support frame 503, and distributors 512 are provided between the pushing cylinders 511. The external steam supply equipment guides a large amount of high-temperature steam into the gas injection cylinder cover 4 through the butt joint pipe 401. Affected by the flow pressure of the steam injected under continuous high pressure, the steam first fills the inside of the gas injection cylinder cover 4, and the top of the gas injection cylinder cover 4 is blocked by the guide plate 102, so that the steam is guided downward along the inside of the falling film evaporation cylinder 1;

[0050] During the steam flow, the heat exchange tube 101 absorbs the high temperature heat in the steam and heats the raw material flow film layer on its inner wall. The excess steam is collected at the bottom of the falling film evaporation tube 1. The bottom of the falling film evaporation tube 1 is separated from the liquid return tube 2 by a partition plate, so that the collected steam flows back to the external steam supply device along the steam outlet pipe 105. The water droplets generated by the steam flowing inside the falling film evaporation tube 1 are collected at the top of the partition plate and guided to the outside by the condensate outlet pipe 106.

[0051] The top of both ends of the support frame 503 is symmetrically provided with an upper cover plate 505, and the bottom of both ends of the support frame 503 is symmetrically provided with a lower cover plate 508, a plurality of groups of micro motors 507 are respectively embedded in the center of the upper cover plate 505 and the lower cover plate 508, and the output end of the micro motor 507 is provided with a telescopic cylinder 509 connected to a water spray brush plate 510, a clean water outlet 506 is provided on the top of the upper cover plate 505, and a drain outlet 513 is provided at the bottom of the lower cover plate 508;

[0052] A material collecting seat 201 is provided at the bottom of the liquid return cylinder 2, a liquid discharge pipe 204 is provided through the middle of the material collecting seat 201, a ring frame 202 is connected to the inner wall of the bottom of the liquid return cylinder 2, and a ring array of drop barrels 203 is arranged on the surface of the ring frame 202, a cross 207 is provided at the center of the drop barrel 203, a needle 206 is provided on the top of the cross 207, and a guide rod 208 is provided at the bottom of the cross 207, and a steam discharge pipe 205 connected to the diversion cylinder 3 is provided on the top cylinder wall of the liquid return cylinder 2;

[0053] During the process of the evaporated raw material flowing film layer being directed and sprayed toward the liquid return cylinder 2 along the hole, the raw material flowing film layer first contacts the needle head 206 in the air, and the needle head 206 guides it in a contact manner, so that it quickly enters the drop barrel 203. Affected by the shape of the drop barrel 203, the raw material flowing film layer liquid is collected, and then guided to flow downstream to the collection seat 201 through the guide rod 208, and is guided into the inside of the discharge pipe 204 by the collection seat 201. The drop barrel 203 is trumpet-shaped from top to bottom, and the diameter of the middle part is narrow, which effectively reduces the collision between the raw material flowing film layer liquid accelerated by its own weight, negative pressure suction and gas injection and the collection seat 201, avoids sputtering, and causes the raw material component in the raw material hot vapor to be reduced. At the same time, due to the continuous contact with the raw material hot gas, the drop barrel 203 and the needle head 206 are continuously heated to high temperature, and they contact with the raw material flowing film layer liquid falling at a high speed, further increasing the generation of raw material hot gas.

[0054] An air inlet 301 connected to the steam exhaust pipe 205 is arranged on the outer wall of the middle part of the split tube 3, a liquid discharge pipe 2 302 is arranged at the bottom of the split tube 3, and an air exhaust port 304 is arranged at the top of the split tube 3. An arc groove 306 is arranged on the surface of the baffle 303, and multiple groups of convex columns 307 are arranged on the edges of both ends of the arc groove 306. The steam exhaust pipe 205 guides the raw material hot vapor collected at the top of the return liquid tube 2 into the split tube 3. Under the influence of pressure and negative pressure suction, when the raw material hot vapor enters the split tube 3;

[0055] First, the raw material hot vapor contacts the baffle plate 303, and then contacts the gas separator 305 on the baffle plate 303, causing the raw material hot vapor to be diverted along the gas separator 305 to the arc groove 306. Guided by the arc groove 306, the raw material hot vapor is caused to reflux along a certain trajectory in the inner cavity at the bottom of the diversion tube 3. Under the push of the continuously entering raw material hot vapor, it enters the gas outlet 304 along the top of the diversion tube 3. In this process, the raw material hot vapor contacts the inner wall of the diversion tube 3, causing some easily condensed raw materials to gather and drip at the bottom of the diversion tube 3, and be discharged externally guided by the second discharge pipe 302.

[0056] In combination with Example 1 and Example 2, the overall falling film evaporator intelligent control operation process can be formed through the system data analysis and mechanical linkage coordination, and the abnormal distributor 512 can be quickly replaced by using the signal generated by the exchange mechanism 5 to reduce the loss of downtime for replacement of the entire device, and complete the quick cleaning of the distributor 512. The residual raw material flowing film liquid after heat treatment can be subjected to secondary heat treatment and anti-sputtering treatment through the drop barrel 203, and the raw material hot gas can be guided to swirl in the diversion barrel 3 through the baffle plate 303 to promote gas-liquid two-phase diversion.

[0057] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A falling film evaporator with a vapor-liquid two-phase separation guide structure, comprising a falling film evaporation cylinder (1), characterized in that: The falling film evaporation cylinder (1) is provided with an air injection cylinder cover (4) at the top, and a partition seat (108) is provided at the bottom of the falling film evaporation cylinder (1); a replacement mechanism (5) is provided at the top of the air injection cylinder cover (4); the replacement mechanism (5) comprises a lower kit (501), an upper cover (502) and a support frame (503); a micromotor (507) and a water spray brush plate (510) are provided on the end surface of the support frame (503); a control panel is provided on the outside of the falling film evaporation cylinder (1); and a liquid return cylinder (2) is provided at the bottom of the partition seat (108); The liquid return cylinder (2) is provided with a ring frame (202) and a dropper cylinder (203) inside, the liquid return cylinder (2) is provided with flow dividing cylinders (3) in parallel on the outer periphery, the flow dividing cylinder (3) is provided with a flow blocking plate (303) inside, and a gas dividing plate (305) is provided on the surface of the flow blocking plate (303); The falling film evaporation tube (1) is provided with a plurality of groups of heat exchange tubes (101) inside, and an outer cone head (104) is provided on the top of the heat exchange tube (101), an inner cone head (109) is provided on the inner wall of the outer cone head (104), and a guide plate (102) is provided on the outer periphery of the outer cone head (104), and a guide groove (103) is provided in a groove on the surface of the guide plate (102), a steam outlet pipe (105) and a condensate outlet pipe (106) are provided through the bottom wall of the falling film evaporation tube (1), and a card cover (107) connected to a partition seat (108) is provided at the bottom of the falling film evaporation tube (1); A material collecting seat (201) is provided at the bottom of the liquid return cylinder (2), a liquid discharge pipe (204) is provided through the middle of the material collecting seat (201), the ring frame (202) is connected to the inner wall of the bottom of the liquid return cylinder (2), and the material drop cylinders (203) are arranged in a circular array on the surface of the ring frame (202), a cross (207) is provided at the center of the inner part of the material drop cylinder (203), a needle (206) is provided at the top of the cross (207), and a guide rod (208) is provided at the bottom of the cross (207), and a steam discharge pipe (205) connected to the diversion cylinder (3) is provided on the top cylinder wall of the liquid return cylinder (2); An air inlet (301) connected to a steam exhaust pipe (205) is arranged on the middle outer wall of the diverter tube (3), a second liquid exhaust pipe (302) is arranged at the bottom of the diverter tube (3), an air exhaust port (304) is arranged at the top of the diverter tube (3), an arc-shaped groove (306) is arranged on the surface of the baffle plate (303), and a plurality of groups of convex columns (307) are arranged at the edges of both ends of the arc-shaped groove (306).

2. The falling film evaporator with a vapor-liquid two-phase separation guide structure according to claim 1, characterized in that: A docking tube (401) is provided through the outer wall of the gas injection cylinder cover (4), a ring sleeve (402) is provided on the top of the gas injection cylinder cover (4), and the bottom of the lower sleeve (501) is connected to the ring sleeve (402), an injection tube (504) is provided on the top of the upper cover (502), an upper sleeve adapted to the lower sleeve (501) is provided in the middle of the support frame (503), and pushing cylinders (511) are provided on the inner walls of both sides of the support frame (503), and distributors (512) are provided between the pushing cylinders (511).

3. The falling film evaporator with a vapor-liquid two-phase separation guide structure according to claim 2, characterized in that: Upper covers (505) are symmetrically arranged at the top of both ends of the support frame (503), and lower covers (508) are symmetrically arranged at the bottom of both ends of the support frame (503). A plurality of groups of micromotors (507) are respectively embedded in the center of the upper covers (505) and the lower covers (508), and a telescopic cylinder (509) connected to a water spray brush plate (510) is arranged at the output end of the micromotors (507). A clean water outlet (506) is arranged at the top of the upper covers (505), and a drain outlet (513) is arranged at the bottom of the lower covers (508).

4. The falling film evaporator with a vapor-liquid two-phase separation guide structure according to claim 1, characterized in that: The control panel is internally provided with a processor, a current sharing data acquisition module, a data operation analysis module and a component control module; The flow-averaging data acquisition module is used to collect the porous film discharge fluctuation value DKz located on the falling film evaporation cylinder (1) and the input-output comparison value LLz located on the liquid return cylinder (2) during the use of the falling film evaporator, and send the porous film discharge fluctuation value DKz and the input-output comparison value LLz to the data operation analysis module via the processor; After receiving the porous film discharge fluctuation value DKz and the input / output comparison value LLz, the data operation analysis module immediately analyzes the blockage risk of the falling film evaporator. The specific analysis process is as follows: the porous film discharge fluctuation value DKz and the input / output comparison value LLz of the falling film evaporator within the time threshold are obtained, the blockage risk coefficient Di is obtained by the formula, and the preset blockage risk coefficient Yi stored and entered is retrieved from the processor for comparison and analysis with the blockage risk coefficient Di; if the blockage risk coefficient Di ≥ the preset blockage risk coefficient Yi, it is determined that there is an abnormal risk in the use of the falling film evaporator within the time threshold, and a cleaning signal is generated. The generated signal is sent to the signal execution module via the processor. After receiving the cleaning signal, the signal execution module immediately operates the micromotor (507); If the congestion risk coefficient Di is less than the preset congestion risk coefficient Yi, no signal is generated.

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