Horizontal tube falling film evaporator

Abstract

The invention discloses a horizontal tube falling film evaporator. Comprising an internal heat exchange system and an automatic descaling system, and the internal heat exchange system comprises a plurality of horizontal pipes; the automatic descaling system can remove dirt generated in the heat exchange process of the horizontal pipe. The automatic descaling system comprises a scale scraping assembly capable of moving in a reciprocating mode, and the scale scraping assembly is arranged on the periphery of the horizontal pipe. At least one scale scraping assembly is arranged on the periphery of each horizontal pipe; the horizontal pipe falling-film evaporator solves the problem of scaling of the horizontal pipe in the using process of the horizontal falling-film evaporator, the internal heat exchange system is modularly designed and can be conveniently taken out for rapid replacement, the replacement time of the internal heat exchange system is shortened, and the using efficiency of the horizontal pipe falling-film evaporator is improved.

Description

Technical Field

[0001] The present application relates to the field of chemical machinery, and in particular to a horizontal tube falling film evaporator. Background Art

[0002] At present, evaporators can be divided into falling film evaporators and rising film evaporators according to the film formation form. Among them, tubular falling film evaporators are widely used due to their high heat transfer coefficient. Tubular falling film evaporators are further divided into vertical tube falling film evaporators and horizontal tube falling film evaporators according to the placement of heat exchange tubes. Since the material in the evaporator flows in a film state, the flow rate is low and it is easy to scale. If the film is not evenly distributed, it is easy to cause local overheating, resulting in dry burning and damage to the heat exchange tubes. Therefore, falling film evaporators cannot handle evaporation occasions with high viscosity, easy to scale, and materials containing more solids. In addition to the horizontal placement that reduces the head of the feed pump, the application limitations of the horizontal tube falling film evaporator are similar to those of the vertical tube. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present application provides a horizontal tube falling film evaporator.

[0004] The outer surface of the horizontal tube of the horizontal tube falling film evaporator is prone to scaling, which seriously affects the heat exchange efficiency of the horizontal tube falling film evaporator. The current scaling removal technology does not scrape cleanly; the scraping assembly is not convenient to replace. Due to the large number of horizontal tubes and limited internal space of the horizontal falling film evaporator, manual labor cannot meet the long-term and efficient internal cleaning operations, which seriously slows down the production speed.

[0005] Uneven material distribution leads to scaling and accumulation: In the existing technology, the spraying position is fixed, and the impact of the material on the horizontal pipe is fixed. There is no material at the location with large impact, and scaling and accumulation are easy to occur at the location with small impact, which affects the heat exchange efficiency.

[0006] The specific technical solutions of this application are as follows:

[0007] 1. A horizontal tube falling film evaporator, comprising an internal heat exchange system and an automatic descaling system;

[0008] The internal heat exchange system includes a plurality of horizontal tubes for performing heat exchange processing;

[0009] The automatic descaling system can remove the dirt generated on the horizontal tubes during the heat exchange process;

[0010] The automatic descaling system comprises a scraping assembly capable of reciprocating movement, the scraping assembly being arranged on the outer periphery of the horizontal tube; and at least one scraping assembly is arranged on the outer periphery of each horizontal tube;

[0011] The scraping assembly comprises a circular scraping ring, and the scraping ring is provided with an opening for dividing the scraping ring;

[0012] The scraper assembly also includes gaskets respectively arranged on both sides of the scraper ring;

[0013] The gasket and the scraper ring are detachably fixedly connected.

[0014] 2. The evaporator according to item 1, wherein the scraper ring is stepped at the opening, and the thickness of the scraper rings that are interlocked and connected at both ends is equal to the overall thickness of the scraper ring.

[0015] 3. The evaporator according to item 1, wherein the automatic descaling system further comprises a power assembly and a connection assembly, wherein the power assembly is used to drive the scraping assembly to move back and forth; and the connection assembly is used to connect the power assembly to the scraping assembly.

[0016] 4. The evaporator according to item 3, wherein the power assembly comprises a driving machine and a transmission part, the driving machine drives the transmission part to operate; and the transmission part is connected to the connecting assembly;

[0017] The transmission part includes one of a chain drive, a gear rack drive, a belt drive, a ball screw, a trapezoidal screw, and a screw nut, preferably a ball screw.

[0018] 5. An evaporator according to item 3, wherein the connecting assembly comprises a fixed seat and a scraper, the fixed seat is connected to a power assembly, the power assembly drives the fixed seat to move back and forth, and the scraper is mounted on the fixed seat; the scraping assembly is mounted on the scraper.

[0019] 6. The evaporator according to item 5, wherein a plurality of scrapers are provided, both ends of the scrapers are respectively fixed on a fixing seat, and a plurality of scraper assemblies are fixed on the scrapers.

[0020] 7. The evaporator according to item 1, wherein the evaporator further comprises a material distribution system, and the material distribution system is arranged above the internal heat exchange system;

[0021] The material distribution system comprises a spray pipe and a liquid distributor. The spray pipe is arranged above the liquid distributor. The liquid distributor can make the liquid in the liquid spray pipe flow evenly to the internal heat exchange system.

[0022] 8. An evaporator according to item 7, wherein the spray pipe comprises a main inlet pipe for liquid to enter and a plurality of branch pipes capable of uniformly spraying the liquid into the liquid distributor; the main inlet pipe is connected to the branch pipes.

[0023] 9. The evaporator according to item 7, wherein the liquid distributor comprises a baffle and a distribution assembly connected to the baffle; the baffle is arranged in an annular shape, and the distribution assembly is arranged inside the baffle near the lower end; a plurality of gaps for liquid to pass through are formed inside the distribution assembly; and the gaps are dispersed between the baffles;

[0024] The distribution assembly includes a plurality of tubes arranged side by side, and gaps are formed between the tubes for liquid to pass through;

[0025] The tube body is one of a round tube, a half tube, an angle steel, and a square steel.

[0026] 10. The evaporator according to item 9, wherein the tube body and the horizontal tube are both arranged horizontally, and a gap is formed between two adjacent half-tubes and is located above the horizontal tube.

[0027] 11. An evaporator according to item 1, wherein the internal heat exchange system further comprises a steam distributor and a condensate collector, wherein the steam distributor is connected to the horizontal tube and is used to introduce heating steam into the horizontal tube; the condensate collector is connected to the other end of the horizontal tube and is used to collect condensate in the horizontal tube; and a condensate discharge pipe is connected to the lower end of the condensate collector.

[0028] 12. The evaporator according to item 11, wherein a plurality of steam distribution units are arranged between the steam distributor and the horizontal tubes, the steam distribution units are respectively connected to a specific number of horizontal tubes, and the steam distribution units are connected to the steam distributor using a hose.

[0029] 13. The evaporator according to item 1, wherein the evaporator further comprises a shell system, and the internal heat exchange system and the automatic descaling system are both arranged inside the shell system;

[0030] The housing system comprises a cavity, a front cover plate and a rear cover plate. The cavity is fixedly connected to the rear cover plate. A quick-release assembly is provided between the front cover plate and the cavity. The front cover plate and the cavity are detachably connected.

[0031] 14. An evaporator according to item 13, wherein the quick-release assembly includes a tightening hand wheel and a cover plate moving module, the tightening hand wheel can tighten and loosen the cavity and the front cover plate; the cover plate moving module can move the front cover plate, and the front cover plate is also provided with a support frame for supporting the cover plate when the cover plate moves.

[0032] 15. The evaporator according to item 13, wherein a steam inlet for steam to enter and a condensed liquid outlet for condensed liquid to discharge are provided on the cavity;

[0033] The cavity is provided with a material inlet and a material outlet for material to enter and exit;

[0034] The cavity is provided with a vacuum interface;

[0035] The cavity is provided with a viewing mirror and a light source for observing the interior of the cavity;

[0036] A magnetic fluid sealing interface for keeping the cavity sealed is arranged on the cavity; and a bottom supporting seat is arranged below the cavity.

[0037] Beneficial Effects

[0038] The present application distributes the liquid evenly on the horizontal tube through a liquid distributor, thereby reducing scaling of the horizontal tube, and cleans the attachments on the horizontal tube by reciprocating motion of a descaling rubber scraper ring, thereby solving the scaling problem of the horizontal tube during the use of the horizontal falling film evaporator. The internal heat exchange system is modularly designed to facilitate removal for quick replacement, thereby reducing the replacement time of the internal heat exchange system, improving the working efficiency of the horizontal tube falling film evaporator, reducing manual intervention, reducing production risks, improving production safety, meeting the ease of use requirements in the actual production process, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the evaporator of the present application;

[0040] Figure 2 is a structural diagram of the internal heat exchange system in this application;

[0041] Figure 3 is a structural diagram of a liquid distributor in this application;

[0042] Figure 4 It is a structural diagram of the scraping assembly in this application;

[0043] Figure 5 is a structural diagram of the power assembly in this application;

[0044] Figure 6 It is a structural diagram of the horizontal tube in this application.

[0045] In the figure, 1. cavity; 11. front cover; 12. rear cover; 13. material inlet; 14. tightening hand wheel; 15. cover moving module; 2. horizontal pipe; 21. steam distributor; 22. steam distribution unit; 23. condensate collector; 3. scraper; 31. gasket; 32. scraper; 33. fixed seat; 34. optical axis; 35. ball screw; 36. synchronizer; 37. drive motor; 4. spray pipe; 41. baffle; 42. pipe body. DETAILED DESCRIPTION

[0046] The present application is described in detail below. Although specific embodiments of the present application are shown, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0047] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the functional differences of components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" are open-ended terms and should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the present application, but the description is based on the general principles of the specification and is not intended to limit the scope of the present application. The scope of protection of the present application shall be determined by the attached claims.

[0048] refer to Figure 1 , the present application provides a horizontal tube falling film evaporator. It includes an internal heat exchange system and an automatic descaling system;

[0049] The internal heat exchange system comprises a plurality of horizontal tubes 2 for heat exchange processing;

[0050] The automatic descaling system can remove the dirt generated by the horizontal tube 2 during the heat exchange process;

[0051] The automatic descaling system comprises a scraping assembly capable of reciprocating movement, and the scraping assembly is arranged on the outer periphery of the horizontal pipe 2; and at least one scraping assembly is arranged on the outer periphery of each horizontal pipe 2;

[0052] The scraper assembly comprises a scraper ring 3 in an annular shape.

[0053] refer to Figure 1 and Figure 2 The internal heat exchange system is used to perform heat exchange treatment on the materials. A heat exchange medium is passed through the internal heat exchange system. After the materials enter the internal heat exchange system, they are heated or cooled by the internal heat exchange system to achieve heat exchange treatment of the materials.

[0054] refer to Figure 1 and Figure 5 The automatic descaling system is connected to the internal heat exchange system. The automatic descaling system can remove the dirt generated by the internal heat exchange system during use, so that the internal heat exchange system can be kept clean, thereby enabling the internal heat exchange system to have a higher heat exchange processing efficiency and improve the use efficiency of the falling film evaporator.

[0055] refer to Figure 1 and Figure 2 The horizontal tube 2 is a hollow structure, and heat exchange medium and material flow inside and outside the horizontal tube 2, respectively. Preferably, the heat exchange medium flows inside the horizontal tube 2, and the material flows outside the horizontal tube 2.

[0056] 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500, 3000, 3500, 4000, 4500, 5000, 5500, 6000, 6500, 7000, 7500, 8000, 8500, 9000, 9500, 10000.

[0057] refer to Figure 1 and Figure 2 The automatic descaling system is arranged on the outside or inside of the horizontal tube 2. Since liquid flows on both the inside and outside of the horizontal tube 2, impurities or dirt may be generated on the inside or outside of the horizontal tube 2. Both will affect the heat exchange efficiency of the horizontal tube 2. Preferably, the automatic descaling system is arranged on the outside of the horizontal tube 2.

[0058] refer to Figure 1 and Figure 2 In a specific embodiment, the material flows outside the horizontal pipe 2, so that impurities or dirt are deposited outside the horizontal pipe 2, so the automatic descaling system is set outside the horizontal pipe 2.

[0059] refer to Figure 1 and Figure 2 The scraping assembly can remove the dirt generated on the outer surface of the horizontal pipe 2.

[0060] The scraping assembly reciprocates on the horizontal pipe 2 , and simultaneously scrapes the dirt attached to the outer peripheral surface of the horizontal pipe 2 away from the horizontal pipe 2 during the reciprocating movement, so that the dirt is removed from the horizontal pipe 2 .

[0061] Preferably, when the scraping assembly reciprocates in the horizontal pipe 2, both sides of the scraping assembly can scrape off the dirt on the horizontal pipe 2, thereby improving the dirt removal efficiency of the scraping assembly on the horizontal pipe 2.

[0062] refer to Figure 1 and Figure 6 , the number of scraping assemblies on each horizontal tube 2 is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Preferably, the number of scraping assemblies on each horizontal tube 2 is 1.

[0063] refer to Figure 1 and Figure 2 The scraping ring 3 is arranged on the outside of the horizontal tube 2, and the inner diameter of the annular scraping ring 3 is adapted to the inner diameter of the horizontal tube 2. The scraping ring 3 can be sleeved and fitted on the outer surface of the horizontal tube 2 to slide.

[0064] refer to Figure 1 and Figure 2 When the scraper ring 3 reciprocates on the horizontal tube 2, it can scrape off the dirt attached to the horizontal tube 2, thereby reducing the dirt residue on the horizontal tube 2. When the horizontal tube 2 is exchanging heat, the efficiency of the heat exchange medium transferring heat to the horizontal tube 2 and the efficiency of the horizontal tube 2 transferring heat to the material are improved, thereby improving the overall heat exchange efficiency of the horizontal tube 2 and the falling film evaporator.

[0065] Furthermore, the scraper ring 3 removes dirt on the horizontal pipe 2, making the outer surface of the horizontal pipe 2 neater. At the same time, the outer surface of the horizontal pipe 2 is heated more evenly when it comes into contact with the material, reducing the impact of uneven local heating of the horizontal pipe 2 due to dirt, thereby reducing the possibility of the horizontal pipe 2 being ruptured and damaged due to local temperature differences, thereby increasing the service life of the horizontal pipe 2 and improving the safety of the horizontal pipe 2.

[0066] refer to Figure 2 and Figure 4 , the scraper assembly further includes a gasket 31 arranged on the scraper ring 3;

[0067] Preferably, gaskets 31 are provided on both sides of the scraper ring 3;

[0068] Preferably, the gasket 31 and the scraper ring 3 are detachably fixedly connected;

[0069] Further preferably, the gasket 31 and the scraper ring 3 are connected by bolts.

[0070] refer to Figure 4 and Figure 6 The scraper ring 3 is used to scrape the dirt on the horizontal pipe 2, and the gasket 31 is used to fix the scraper ring 3 to improve the stability of the scraper ring 3. At the same time, the gasket 31 can also increase the rigidity of the scraper ring 3, improve the hardness of the scraper ring 3 when scraping dirt, and thus improve the ability of the scraper ring 3 to remove dirt.

[0071] refer to Figure 4 and Figure 6Preferably, when the scraper 3 is scraping dirt, the reciprocating motion of the scraper 3 can scrape dirt from the horizontal pipe 2, so both sides of the scraper 3 are reinforced with gaskets 31. On the one hand, the scraper 3 improves the cleaning efficiency of the horizontal pipe 2; on the other hand, the wear difference between the two sides of the scraper 3 is reduced, and the service life of the scraper 3 and the utilization rate of the scraper 3 are improved.

[0072] refer to Figure 4 and Figure 6 The gasket 31 is used to reinforce the scraper ring 3, and the gasket 31 can also play a role of connection and fixing. The scraper ring 3 is clamped and fixed using two gaskets 31, and then connected to the power mechanism.

[0073] refer to Figure 4 and Figure 6 In order to improve the cleaning efficiency and cleaning effect of the scraper ring 3 on the horizontal tube 2 during use, the scraper ring 3 abuts against the outer surface of the horizontal tube 2, and friction will inevitably occur between the scraper ring 3 and the horizontal tube 2 during the reciprocating movement of the scraper ring 3. Therefore, the hanging ring will be worn during the scraping process. The gasket 31 of the fixed scraper ring 3 has less wear or even no wear. Therefore, the service life of the gasket 31 is greater than the service life of the scraper ring 3.

[0074] refer to Figure 4 and Figure 6 The gasket 31 is detachably connected to the scraper ring 3. When the scraper ring 3 cannot be used due to wear or other reasons during use, only the scraper ring 3 needs to be replaced. This reduces the replacement cost of consumables. On the other hand, the detachably connected gasket 31 and scraper ring 3 also facilitates maintenance when the scraper assembly fails.

[0075] refer to Figure 4 and Figure 6 In the present application, the parts of the scraper assembly that are easily worn out during use are detachably connected with the parts that are not easily worn out, so that after the scraper assembly in the present application is worn out during use, only the easily worn out parts need to be replaced, thereby achieving the purpose of greatly reducing costs.

[0076] The gasket 31 and the scraper ring 3 are provided with corresponding bolt holes. The scraper ring 3 and the gaskets 31 on both sides thereof are fixedly connected by bolts. The scraper ring 3 and the gasket 31 are fixed. At the same time, the bolt connection is low-cost, highly stable and removable. It is convenient to install and fix the scraper ring 3 and the gasket 31.

[0077] refer to Figure 4 and Figure 6 The scraping circle 3 is provided with an opening for dividing the scraping circle 3 , and the scraping circle 3 is stepped at the opening, and the thickness of the scraping circles 3 that are interlocked and connected to each other at the connection points at both ends is equal to the overall thickness of the scraping circle 3 .

[0078] refer to Figure 4 and Figure 6 The scraper ring 3 is annular when installed on the horizontal pipe 2. The opening is a through opening to divide the annular scraper ring 3. Therefore, when the scraper ring 3 is installed on the horizontal pipe 2, the scraper ring 3 can be passed through the horizontal pipe 2 from the opening, and then the scraper ring 3 is connected to the horizontal pipe 2.

[0079] refer to Figure 4 and Figure 6 The two ends of the scraping ring 3 at the opening are respectively complementary stepped structures. When the scraping rings 3 are combined together, the two ends of the scraping ring 3 are nested with each other at the opening to form a ring-shaped structure.

[0080] refer to Figure 4 and Figure 6 Gaskets 31 are respectively provided on both sides of the scraper ring 3 for installation and fixing, so that the thickness of the two ends of the scraper ring 3 at the connection of the opening is in a flush state, so that the gasket 31 can stably clamp the scraper ring 3. Increase the contact area between the gasket 31 and the scraper ring 3.

[0081] refer to Figure 4 and Figure 6 When the scraper ring 3 is installed on the horizontal pipe 2, the gaskets 31 on both sides of the scraper ring 3 will squeeze the scraper ring 3 toward the middle, thereby pressing and fixing the two ends of the scraper ring 3 that are interlocked with each other. At the same time, the static friction between the two ends of the scraper ring 3 is increased, making the installation of the scraper ring 3 more stable, and further reducing the possibility of the scraper ring 3 being separated from the horizontal pipe 2 after installation.

[0082] refer to Figure 1 and Figure 5 The automatic descaling system also includes a power component and a connecting component. The power component is used to drive the scraping component to move back and forth; the connecting component is used to connect the power component to the scraping component.

[0083] refer to Figure 1 and Figure 5 The power component is a power source, providing power for the scraping component to reciprocate. Then, the power component is connected to the scraping component using a connecting component, so that the power of the power component can be transmitted to the scraping component, so that the scraping component can reciprocate.

[0084] refer to Figure 1 and Figure 5The mobile component can not only connect the power component to the scraping component, but also disconnect the power component from the scraping component. During use, when the scraping component needs to replace parts, the connecting component disconnects the power component from the scraping component, and then replaces the parts of the scraping component, thereby reducing the impact of the power component on the replacement of parts. Furthermore, disconnecting the power source of the power component helps to improve the work safety of the staff when replacing parts and reduce the occurrence of accidents.

[0085] On the other hand, after the scraping assembly is installed on the horizontal pipe 2, the power assembly can be installed at a suitable position that meets the conditions of safety, reliability, easy disassembly and maintenance, and then the driving force of the power assembly is transmitted to the scraping assembly using the connecting assembly, making the installation position of the power assembly more flexible.

[0086] refer to Figure 2 and Figure 6 , and, there are multiple scraping assemblies and they are respectively located on each horizontal pipe 2, so the connecting assembly can also connect multiple scraping assemblies, so that the power assembly can simultaneously drive the multiple scraping assemblies to move under the connection of the connecting assembly, thereby improving the operating efficiency of the scraping assembly.

[0087] refer to Figure 5 The power assembly includes a driving machine 37 and a transmission part, wherein the driving machine 37 drives the transmission part to operate; the transmission part is connected to the connecting assembly;

[0088] The transmission part includes one of a chain drive, a gear rack drive, a belt drive, a ball screw, a trapezoidal screw, and a screw nut, preferably a ball screw;

[0089] The driving machine 37 is a power source, and preferably, the driving machine 37 is a motor.

[0090] refer to Figure 1 and Figure 5 On the one hand, the transmission part can transmit the power of the driver 37 to the connecting component; on the other hand, the transmission part can convert the operation mode of the driver 37 into the required operation mode. For example: converting the rotational motion of the motor into movement or converting the rotation of the motor output shaft into vertical rotational motion, etc. The connecting component is connected to the driver 37 through the transmission part, so that the driver 37 can have more options. In addition, choosing a suitable transmission part can protect the driver 37. For example, the belt drive can slip when overloaded to protect the driver 37. Or the screw nut drive has a reverse self-locking function to prevent the driver 37 from reversing. The transmission part allows the driver 37 to have more options, and the transmission part can also have more installation positions and installation forms. Furthermore, the transmission part can also protect the use of the driver 37, improve the service life of the driver 37, and improve the service life of the power component.

[0091] refer to Figure 1 and Figure 5 When the transmission part is a ball screw 35, the screw is connected to the output shaft of the driver 37, and the nut is connected to the connecting assembly. The driver 37 drives the screw to rotate, and then when the driver 37 rotates forward and backward, the driving nut and the connecting assembly achieve reciprocating movement. On the one hand, the transmission part is used to convert the rotational motion of the driver 37 into reciprocating motion. On the other hand, the rotational motion of the screw and the reciprocating motion of the nut have a high transmission ratio, so that the driver 37 can provide a small driving force to achieve the reciprocating motion of the nut. In addition, the threaded connection between the nut and the screw uses balls to reduce friction, thereby reducing the energy loss of the driver 37, so the ball screw 35 has higher working efficiency.

[0092] refer to Figure 1 and Figure 5 The connecting assembly includes a fixed seat 33 and a scraper 32 . The fixed seat 33 is connected to a transmission part, and the transmission part drives the fixed seat 33 to move back and forth. The scraper 32 is installed on the fixed seat 33 ; the scraping assembly is installed on the scraper 32 .

[0093] The fixing seat 33 is connected to the transmission part, and the transmission part can drive the fixing seat 33 to move back and forth. When the transmission part is a ball screw 35, the fixing seat 33 is fixed on the nut.

[0094] refer to Figure 6 The scraper 32 is a plate-shaped structure, and a plurality of mounting portions (not shown in the figure) are provided on the scraper 32, and the scraping components are fixed at the mounting portions. Therefore, a plurality of scraping components are provided on each scraper 32, and when the fixed seat 33 drives the scraper 32 to move, the scraper 32 can drive the plurality of scraping components to move at the same time.

[0095] refer to Figure 6 The scraper 32 is provided with a plurality of tube holes (not shown in the figure), and the horizontal tube 2 is installed in the tube holes. The scraping assembly is sleeved on the horizontal tube 2, and the scraping assembly corresponds to the tube holes one by one.

[0096] The scraper 32 is provided with mounting holes (not shown in the figure), the mounting holes are located at the outer peripheral side of the tube hole, and a plurality of mounting holes are provided at the outer periphery of each tube hole. The mounting holes are used to install the scraping assembly.

[0097] The bolt holes are opened to match the mounting holes.

[0098] refer to Figure 1 and Figure 6During installation, the horizontal tube 2 passes through the tube hole, and the scraper 32 is installed on the horizontal tube 2. Then the horizontal tube 2 passes through the gasket 31, the scraper ring 3, and the gasket 31 in sequence, and the scraper ring 3 and the gasket 31 are installed on the horizontal tube 2. After that, the bolt holes and the installation holes are made to correspond to each other. Then, bolts are used to pass through the scraper 32, the gasket 31, the scraper ring 3, and the gasket 31 in sequence, and then fixed with nuts, so that the two gaskets 31 and the scraper ring 3 are fixed on the scraper 32 together.

[0099] When the scraper 32 moves back and forth, it will drive the scraper ring 3 to move back and forth on the horizontal pipe 2 at the same time, and then the scraper ring 3 scrapes the dirt on the horizontal pipe 2, thereby reducing the dirt adhesion on the horizontal pipe 2.

[0100] refer to Figure 1 It is worth mentioning that in the present application, since the gasket 31 and the scraper 32 are both sleeved on the horizontal tube 2, and the scraper ring 3 is squeezed and fixed on the scraper 32 by bolts. The scraper ring 3 will be worn out during the scraping process. Therefore, the scraper ring 3 needs to be replaced after a certain period of use. In the present application, the scraper ring 3 is an annular structure with an opening. Therefore, when replacing the scraper ring 3, the fixing bolts are removed, and then the old scraper ring 3 is unfolded from the opening, and then the scraper ring 3 is removed from the horizontal tube 2. Then, the new scraper ring 3 is passed through the horizontal tube 2 from the opening, and the scraper ring 3 is installed to the position of the horizontal tube 2 between the two gaskets 31, and then fixed with bolts, the scraper ring 3 can be replaced. This makes it more convenient to replace the scraper ring 3 that is easy to wear in the scraping assembly.

[0101] refer to Figure 1 , multiple horizontal tubes 2 are arranged in parallel, and then the scraper assembly and the scraper 32 are both sleeved on the outside of the horizontal tube 2. At the same time, the horizontal tubes 2 are compactly arranged adjacent to each other to improve space utilization. This limits the space available for the staff to operate the scraper assembly and the scraper 32 during installation and maintenance, increasing the difficulty of operation for the staff. In addition, the number of horizontal tubes 2 and scraper assemblies is large, and the workload during installation and maintenance is large. Therefore, in the present application, the scraper assembly is arranged as a structure of a gasket 31 and a scraper ring 3. On the one hand, only the scraper ring 3 needs to be replaced during maintenance, which greatly reduces the workload compared to replacing the entire scraper assembly. On the other hand, the opening structure on the scraper ring 3 enables the scraper ring 3 to be installed on the horizontal tube 2 from the side of the horizontal tube 2, making the replacement of the scraper ring 3 simple and simplifying the difficulty of replacing the scraper ring 3.

[0102] refer to Figure 1 and Figure 4, the scraper ring 3 of the wearable part in the scraper assembly is detachably connected with the gasket 31 of the installation and fixing part by bolts. Further, the scraper ring 3 is provided with an opening. Therefore, when replacing the scraper ring 3, it is only necessary to remove the scraper ring 3 directly from the horizontal tube 2, and then replace it with a new scraper ring 3. The replacement steps of the scraper ring 3 are simplified, making the replacement of the scraper ring 3 more convenient. In addition, since a large number of horizontal tubes 2 are arranged in parallel, when the scraper 32 and the gasket 31 are installed or reinstalled on the horizontal tube 2, it is necessary to remove the connecting parts at both ends of the horizontal tube 2 so that the horizontal tube 2 can pass through the gasket 31 and the tube hole. When removing the gasket 31 and the scraper 32 from the horizontal tube 2, it is also necessary to remove the horizontal tube 2 as a whole. Such a large number of horizontal tubes 2 will greatly increase the workload of disassembly and installation.

[0103] The present application ingeniously separates the fixed parts and the parts that are worn during scraping in the scraping assembly, and further, makes the fixed parts and the wearing parts detachably connected. In this way, the fixed parts can be directly installed on the horizontal pipe 2, and when replacing the wearing parts, there is no need to replace or disassemble the fixed parts, and the wearing parts can be directly replaced. Furthermore, the fixed parts are used for connection, so the fixed parts need to ensure sufficient strength for fixing, while the wearing parts themselves are easy to wear, so the strength can be adjusted according to actual needs.

[0104] Specifically, in the present application, the gasket 31 and the scraper ring 3 are separated, and the gasket 31 is an integrally formed circular ring to improve the rigidity and strengthen the fixing effect of the scraper ring 3. An opening is provided on the scraper ring 3 so that the scraper ring 3 can pass through the horizontal tube 2 from the side, which is convenient for the installation of the scraper ring 3. Therefore, by using the gasket 31 to install the scraper ring 3, and then opening the scraper ring 3, it is more convenient to replace the worn parts in the scraper assembly. This is especially obvious when the number of horizontal tubes 2 is large. It can greatly reduce the work intensity and improve the work efficiency of replacing the scraper ring 3.

[0105] Specifically, the number of scraper components fixed on the scraper 32 is: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50. Preferably, the number of scraper components fixed on the scraper 32 is 10 or 20.

[0106] refer to Figure 5 and Figure 6 The scraper 32 is provided with a plurality of scrapers, and both ends of the scraper 32 are respectively fixed on the fixing seat 33 , and the plurality of scraping components are fixed on the scraper 32 .

[0107] refer to Figure 5 and Figure 6 The fixed seat 33 is used to connect the transmission part and the scraper 32. When the transmission part drives the fixed seat 33 to move back and forth, the fixed seat 33 will drive the scraper 32 and the scraping assembly to move at the same time. Multiple scrapers 32 are fixed on the fixed seat 33, so that the fixed seat 33 can drive the scrapers 32 to move at the same time, so that the movement of the scrapers 32 is synchronized, so that the scraping assembly on the scraper 32 can scrape the dirt on the horizontal pipe 2 at the same time, reduce the collision caused by the misalignment of the movement of the scraping assembly, and improve the safety of the scraping assembly on the horizontal pipe 2. Furthermore, the scraping resistance received by the horizontal pipe 2 is more uniform, the displacement of the horizontal pipe 2 is reduced, and the lateral force of the scraping assembly on the horizontal pipe 2 is reduced. In addition, since the position of the dirt on the horizontal pipe 2 is uncertain, the resistance of the scraping assembly when scraping is also multi-directional, especially when the dirt is on the side of the horizontal pipe 2, it will cause the scraping assembly to generate lateral force. When a large number of scraper assemblies are connected and moved synchronously using the scraper 32 and the fixed seat 33, the lateral resistance of the scraper assemblies when scraping dirt can be balanced to the greatest extent, thereby reducing the possibility of lateral deviation of the scraper assemblies, the scraper 32 and the fixed seat 33, and reducing the possibility of lateral extrusion damage to the horizontal pipe 2 by the scraper assemblies, thereby increasing the service life and safety of the scraper assemblies and the horizontal pipe 2.

[0108] refer to Figure 5 and Figure 6 , and the scraper 32 is fixed to the fixing seat 33, the driving assembly drives the fixing seat 33 to move, and the fixing seat 33 is used to drive the scraper 32 to move. In this way, when the power of the driving machine 37 in the driving assembly is insufficient, part or unimportant or infrequently used scrapers 32 can be removed from the fixing seat 33, so that the driving machine 37 only drives part or important parts of the scraper 32 to move. The adaptability of the automatic descaling system is improved. At the same time, the method of partial disassembly can be used for fault detection, which is convenient for troubleshooting and maintenance.

[0109] refer to Figure 5 and Figure 6 , both sides of the scraper 32 are fixed on the fixing seat 33, so that the fixing seat 33 can provide a greater driving force for the scraper 32. The scraper 32 can drive the scraper assembly to remove more stubborn dirt, thereby improving the cleaning effect and working efficiency of the scraper assembly.

[0110] refer to Figure 5 A synchronizer 36 is provided between the driving machine 37 and the transmission part.

[0111] The transmission part is connected to the fixing seat 33, and the transmission part is used to drive the fixing seat 33 to move back and forth.

[0112] In a specific embodiment, two transmission parts are provided, and the two transmission parts are respectively located at the two ends of the fixed seat 33. The two transmission parts simultaneously drive the two ends of the fixed seat 33 to move back and forth, so as to reduce the possibility that the fixed seat 33 is offset due to resistance during movement. Further, the synchronizer 36 is respectively connected to the two transmission parts, and the operation of the two transmission parts is synchronized, so that the two ends of the fixed seat 33 can move synchronously under the drive of the driving machine 37. The movement stability of the fixed seat 33 is improved.

[0113] refer to Figure 1 and Figure 5 An optical axis 34 is connected to the fixing seat 33 , and the optical axis 34 extends along the moving direction of the fixing seat 33 .

[0114] Both ends of the optical axis 34 are relatively fixed, and the optical axis 34 is used to position the fixing seat 33 so that the fixing seat 33 moves along a preset path.

[0115] refer to Figure 1 and Figure 5 In the art, the optical axis 34 is generally used in conjunction with a lead screw, the optical axis 34 is arranged parallel to the lead screw, the lead screw is threadedly connected to a nut, and the nut is slidably connected to the optical axis 34. When the lead screw rotates, the optical axis 34 is used to offset the tangential force of the nut, preventing the nut from rotating, so that the nut can move axially along the optical axis 34 and the lead screw.

[0116] In a specific embodiment, the transmission part is a ball screw 35, and the optical axis 34 is arranged parallel to the screw.

[0117] In a specific embodiment, the number of ball screws 35 is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. The number of optical axes 34 is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20.

[0118] In a specific embodiment, two ball screws 35 are provided and four optical axes 34 are provided. The two ball screws 35 are respectively provided at opposite sides of the fixed seat 33. One optical axis 34 is respectively provided on both sides of the ball screw 35. That is, each ball screw 35 is provided with one optical axis 34 on both sides. The fixed seat 33 is fixedly connected with the nut of the ball screw 35; the optical axis 34 passes through the fixed seat 33, and the optical axis 34 is slidably connected with the fixed seat 33.

[0119] refer to Figure 1 The evaporator also includes a material distribution system, and the material distribution system is arranged above the internal heat exchange system.

[0120] The material distribution system is used to transport materials to the internal heat exchange system.

[0121] refer to Figure 1 Specifically, the material distribution system is located above the horizontal tube 2. The interior of the horizontal tube 2 is used to pass the heat exchange medium. The material falls evenly onto the horizontal tube 2 through the material distribution system, making the material heated more evenly. At the same time, it can also improve the utilization rate of the horizontal tube 2. The heat is transferred to the material through the horizontal tube 2.

[0122] refer to Figure 1 and Figure 2 The material distribution system includes a spray pipe 4 and a liquid distributor. The spray pipe 4 is arranged above the liquid distributor. The liquid distributor can make the liquid in the spray pipe 4 flow evenly to the internal heat exchange system.

[0123] The spray pipe 4 is used to transport the material, and the material is transported to the liquid distributor through the spray pipe 4. The liquid distributor is used to disperse the material. The dispersed material will fall evenly on the horizontal pipe 2. The horizontal pipe 2 can be covered with the material. The utilization rate of the horizontal pipe 2 is increased. At the same time, the evenly dispersed material is also easier to contact with the horizontal pipe 2 to receive the heat on the horizontal pipe 2, thereby improving the heat exchange efficiency of the material.

[0124] refer to Figure 1 The spray pipe 4 includes a main inlet pipe for liquid to enter and a plurality of branch pipes capable of evenly spraying the liquid into the liquid distributor; the main inlet pipe is connected to the branch pipes.

[0125] The size of the main inlet pipe is larger than that of the branch pipe. One end of the branch pipe is connected to the main inlet pipe, and the other end of the branch pipe is a free end, and the free ends of the branch pipes are respectively located at different positions of the liquid distributor. Preferably, the free ends of the branch pipes are evenly distributed at various positions of the liquid distributor.

[0126] refer to Figure 1 and Figure 2 , use the main inlet pipe to transport the material, then use the branch pipe to preliminarily disperse the material, and then use the liquid distributor to make the material fall evenly on the horizontal pipe 2. The branch pipe enables the material to be evenly dispersed on the liquid distributor, thereby improving the space utilization of the liquid distributor. At the same time, the flow rate of the material on the liquid distributor is increased to achieve the purpose of increasing work efficiency.

[0127] refer to Figure 1 and Figure 3The liquid distributor includes a baffle 41 and a distribution component connected to the baffle 41; the baffle 41 is arranged in an annular shape, and the distribution component is arranged at a position near the lower end of the baffle 41; a plurality of gaps for liquid to pass through are formed inside the distribution component. The gaps are dispersed between the baffles 41.

[0128] refer to Figure 1 and Figure 3 The baffle 41 is used to prevent the overflow of materials and to block the materials on the distribution component so that the materials fall onto the horizontal pipe 2 after passing through the distribution component.

[0129] The baffles 41 are placed around the distribution component so that the material is blocked on the distribution component by the baffles 41. Then the material will gather on the distribution component and pass through the gap of the distribution component. After the distribution of this gap, the material will flow to various positions of the horizontal pipe 2, so that the material can evenly fall on the horizontal pipe 2 for heat exchange.

[0130] refer to Figure 1 and Figure 3 Preferably, the distribution assembly includes a plurality of tube bodies 42 arranged side by side, and gaps are formed between the tube bodies 42 for liquid to pass through;

[0131] refer to Figure 1 and Figure 3 The tube bodies 42 are arranged in parallel and there is a space between the tube bodies 42 to form a gap. The material passes through the gap between the tube bodies 42.

[0132] refer to Figure 1 and Figure 3 The gap between the tubes 42 is small in width, so when the material flows into the tubes 42, the amount of material that can pass through the gap is limited, so the material will diffuse along the gap and then pass through the gap. In this way, the gap can achieve a dispersing effect on the material.

[0133] Further preferably, the tube body 42 is one of a round tube, a half tube, an angle steel, and a square steel.

[0134] In a specific embodiment, the tube body 42 is a half tube (ie, a tube with a semicircular cross section).

[0135] refer to Figure 1 and Figure 3In a specific embodiment, the tube body 42 is a half tube with the convex surface facing upward. Since the circular surface is smoother than the flat surface, the material flows more smoothly on the circular surface, and it is more difficult for dirt to form on the circular smooth surface. Therefore, the use of a half tube facilitates the flow of materials and reduces the possibility of material blockage. Increase the smoothness of the flow of materials. In addition, a circular tube can be divided into two half tubes, so the distribution component manufactured using a half tube has a lower manufacturing cost. At the same time, the half tube has no effect or almost no effect on the dispersion effect of the material compared to other structures.

[0136] refer to Figure 1 and Figure 3 The pipe body 42 and the horizontal pipe 2 are both arranged horizontally, and a gap is formed between two adjacent half pipes and is located above the horizontal pipe 2.

[0137] refer to Figure 1 and Figure 3 The gap formed between the tube bodies 42 is also parallel to the tube body 42. After the material passes through the gap, it will fall onto the horizontal tube 2 for heat exchange. Therefore, the position of the tube body 42 is moved so that the gap is located above the horizontal tube 2, increasing the contact area between the material and the horizontal tube 2 and improving the heat exchange efficiency of the material.

[0138] In the present application, the number of tube bodies 42 is not directly related to the number of horizontal tubes 2. The tube bodies 42 and the gaps here are used to disperse the material to increase the contact area between the material and the horizontal tube 2. Therefore, when the material is a liquid or a diluted liquid, a smaller gap is used, and a large number of tube bodies 42 can be used at this time to form more small-sized gaps for the material to pass through. When viscous materials or large particle materials are dispersed, a larger size gap is used, and a small number of tube bodies 42 or small-sized tube bodies 42 will be used at this time. Therefore, it is known in the art that the number of tube bodies 42 and the size of the gaps here are related to the actual use situation, and have no direct relationship with the number of horizontal tubes 2. Those skilled in the art can make a choice according to the actual situation.

[0139] refer to Figure 1 and Figure 2 The internal heat exchange system also includes a steam distributor 21 and a condensate collector 23. The steam distributor 21 is connected to the horizontal pipe 2 and is used to introduce heating steam into the horizontal pipe 2. The condensate collector 23 is connected to the other end of the horizontal pipe 2 and is used to collect condensate in the horizontal pipe 2. A condensate discharge pipe is connected to the lower end of the condensate collector 23.

[0140] refer to Figure 1 and Figure 2The steam distributor 21 is connected to a plurality of horizontal tubes 2. After the steam enters the steam distributor 21, it will diffuse in the steam distributor 21, and then the steam will be evenly transported to the horizontal tubes 2. At the same time, the steam distributor 21 also connects the horizontal tubes 2. The steam in the horizontal tubes 2 can start to flow from the steam distributor 21 at the same time. The steam in the horizontal tubes 2 is made to be at the same level, such as equal temperature or the same composition. The difference in temperature and other conditions in the horizontal tubes 2 is reduced, so that the heat received by the material during heat exchange with the horizontal tubes 2 is the same, the difference in the material after passing through the horizontal tubes 2 is reduced, and the heat exchange efficiency of the horizontal tubes 2 is improved.

[0141] refer to Figure 1 and Figure 2 At the end of the horizontal tube 2, after the material is heated by the heat transfer of the horizontal tube 2, the temperature of the steam will decrease, and the water vapor in the steam will condense into droplets. Then, the condensed droplets will be collected by the condensate collector 23, reducing the retention of droplets in the horizontal tube 2, thereby increasing the content of steam in the horizontal tube 2, and reducing the possibility of the horizontal tube 2 being blocked by condensate, thereby maintaining the heat exchange efficiency of the horizontal tube 2.

[0142] refer to Figure 1 A plurality of steam distribution units 22 are arranged between the steam distributor 21 and the horizontal tube 2. The steam distribution units 22 are respectively connected to a specific number of horizontal tubes 2. The steam distribution units 22 and the steam distributor 21 are connected by a hose.

[0143] refer to Figure 1 The steam distribution unit 22 is a structure including a chamber, and a connection portion is provided on the steam distribution unit 22. The connection portion is used to connect with the horizontal pipe 2.

[0144] refer to Figure 1 After the steam flows through the steam distributor 21, it will first enter the steam distribution unit 22. Then the steam will enter the horizontal pipe 2.

[0145] refer to Figure 1 and Figure 6In a specific embodiment, when the number of horizontal tubes 2 is large, the volume of the steam distributor 21 is also increased. When distributing steam, the steam distributor 21 will inevitably distribute the steam unevenly in a local position, thus resulting in a reduction in the amount of steam introduced into some horizontal tubes 2. Therefore, a steam distribution unit 22 is used to connect the horizontal tubes 2 and the steam distributor 21. The steam distribution unit 22 is connected to some horizontal tubes 2 at the same time. Several steam distribution units 22 are used to disperse a large number of horizontal tubes 2 for connection. At this time, the steam distributor 21 only needs to pass the steam into a small number of steam distribution units 22. The steam distribution unit 22 is used to realize the graded transportation between the steam distributor 21 and a large number of horizontal tubes 2, thereby reducing the influence of poor steam fluidity in some or local horizontal tubes 2.

[0146] refer to Figure 1 and Figure 6 On the other hand, the steam distribution unit 22 is used to connect part of the horizontal pipe 2. When the horizontal pipe 2 fails or needs to be replaced or repaired, only the steam distribution unit 22 needs to be replaced and disassembled without disassembling the steam distributor 21. This makes the maintenance of the horizontal pipe 2 easier.

[0147] In a specific embodiment, the steam distribution unit 22 corresponds to the scraper 32 one by one, that is, the steam distribution unit 22 and the scraper 32 are both connected to the same horizontal pipe 2.

[0148] In a specific embodiment, the number of horizontal pipes 2 connecting the scraper 32 to the steam part unit is: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20.

[0149] In a specific embodiment, the condensate collector 23 includes a plurality of condensate collection units.

[0150] refer to Figure 1 and Figure 6 In a specific embodiment, the condensate collecting unit, the steam distribution unit 22, and the scraper 32 correspond to each other one by one.

[0151] refer to Figure 1 and Figure 6 In a specific embodiment, the internal heat exchange system includes a plurality of independent heat exchange modules, and the heat exchange modules include a steam distribution unit 22, a certain number of horizontal tubes 2, and a condensate collection unit connected in sequence, and a scraper 32 is sleeved on the horizontal tube 2.

[0152] When a large amount of materials need to be heat exchanged, multiple heat exchange modules can be combined to increase the heat exchange area and heat exchange efficiency, so as to speed up the heat exchange process of the materials.

[0153] refer to Figure 1 and Figure 6 In this application, the internal heat exchange system is configured as a plurality of independent heat exchange modules, which makes it easier to remove and replace the heat exchange system, and also makes it easier to inspect and repair the local structure of the horizontal pipe 2. This meets the ease of use requirements in the actual production process and also improves production efficiency.

[0154] refer to Figure 1 The evaporator also includes a shell system, and the internal heat exchange system and the automatic descaling system are both arranged inside the shell system.

[0155] refer to Figure 1 The shell system includes a cavity 1, a front cover plate 11 and a rear cover plate 12. The cavity 1 is fixedly connected to the rear cover plate 12. A quick-release assembly is provided between the front cover plate 11 and the cavity 1, and the front cover plate 11 and the cavity 1 are detachably connected.

[0156] refer to Figure 1 The outer shell system is used to protect the internal heat exchange system and provide a chamber to accommodate the internal heat exchange system. The material enters the internal heat exchange system through the outer shell system, undergoes heat exchange treatment in the internal heat exchange system, and finally flows out through the outer shell system.

[0157] When the internal heat exchange system needs to be repaired or installed, the space between the front cover plate 11 and the cavity 1 is opened, and then the cavity 1 is entered through the front cover plate 11. This facilitates the repair and installation of the internal heat exchange system.

[0158] refer to Figure 1 The quick-release assembly includes a tightening hand wheel 14 and a cover moving module 15. The tightening hand wheel 14 can tighten and loosen the cavity 1 and the front cover 11; the cover moving module 15 can move the front cover 11. The front cover 11 is also provided with a support frame that supports the cover when the cover moves.

[0159] The fastening hand wheel 14 is used to fix the front cover plate 11 . The front cover plate 11 is relatively large in size, so a plurality of fastening hand wheels 14 are provided along the front cover plate 11 .

[0160] The tightening hand wheel 14 can provide a relatively large tightening force, so the front cover plate 11 can be simply fixed on the cavity 1 , and a seal can be achieved between the cavity 1 and the front cover plate 11 .

[0161] refer to Figure 1The cover moving module 15 can provide support for the cavity 1 and the front cover 11 to reduce the shaking of the cavity 1 and the front cover 11. Similarly, when the front cover 11 is opened, the front cover 11 can be moved and fixed, so that the front cover 11 can be removed from the cavity 1 to allow personnel to enter the cavity 1 for maintenance, and the front cover 11 can be fixed. When the front cover 11 is needed to seal the cavity 1, the front cover 11 is moved onto the cavity 1. This makes the movement of the front cover 11 more convenient.

[0162] refer to Figure 1 The cavity 1 is provided with a steam inlet for steam to enter and a condensed liquid outlet for condensed liquid to be discharged;

[0163] The steam inlet is in communication with the steam distributor 21 , so that the steam can enter the steam distributor 21 from the steam inlet.

[0164] The condensed liquid outlet is communicated with the condensed water collector 23 , and the condensed water collected in the condensed water collector 23 is discharged from the cavity 1 through the condensed liquid outlet.

[0165] refer to Figure 1 Preferably, a material inlet 13 and a material outlet for material entry and exit are provided on the cavity 1;

[0166] The material outlet is located at the bottom of the cavity 1, and the material inlet 13 is located at the top of the cavity 1. The material inlet 13 is connected to the main inlet pipe of the material distribution system. The material is transported to the main inlet pipe through the material inlet 13, and then distributed to the horizontal pipe 2. Finally, it falls to the bottom of the cavity 1 and is discharged from the cavity 1 from the material outlet.

[0167] refer to Figure 1 , further preferably, a vacuum interface is provided on the cavity 1;

[0168] When the material in the cavity 1 requires a vacuum environment or is easily affected by the external environment, the interior of the cavity 1 can be evacuated to a vacuum state through the vacuum interface to reduce the impact of the external environment on the material and improve the adaptability of the evaporator.

[0169] refer to Figure 1 , further preferably, a mirror and a light source for observing the interior of the cavity 1 are provided on the cavity 1;

[0170] The light source is used to provide light inside the cavity 1 so that the staff can see the internal situation clearly through the viewing mirror.

[0171] Further preferably, a magnetic fluid sealing interface for maintaining the sealing of the cavity 1 is provided on the cavity 1 ; and a bottom support seat is provided below the cavity 1 .

[0172] The magnetic fluid sealing interface can increase the sealing inside the cavity 1 and reduce the possibility of leakage of materials in the cavity 1. The bottom support seat can support the cavity 1 so that there is space between the material outlet and the ground for collecting the materials after heat exchange.

[0173] In summary, the present application provides a horizontal tube falling film evaporator. When in use, the material is transported from the material inlet 13 to the inside of the cavity 1, and the material enters the main inlet pipe and then flows to the branch pipe. Then it is transported to the distribution component, evenly diffused on the tube body 42 to achieve uniform distribution of the material, and then flows through the gap between the tube bodies 42 and falls on the horizontal tube 2 for heat exchange treatment. Finally, it is discharged from the cavity 1 from the material outlet.

[0174] The steam in the horizontal tube 2 enters the steam distributor 21 inside the cavity 1 from the steam inlet, then flows through the distribution of the steam distributor 21 and enters each steam distribution unit 22, and then enters the horizontal tube 2. After the steam is cooled, it condenses into liquid, which is collected by the condensate collector 23 and finally discharged from the condensed liquid outlet.

[0175] The scraper assembly is sleeved on the horizontal pipe 2. When there is dirt on the horizontal pipe 2, the driving machine 37 will start, and under the action of the synchronizer 36, the ball screws on both sides of the fixed seat 33 will be driven to rotate, thereby causing the fixed seat 33 to reciprocate; and the scraper 32 and the scraper ring 3 and the gasket 31 thereon will be driven to reciprocate to scrape the dirt on the horizontal pipe 2. When the scraper ring 3 is worn and damaged after multiple uses, the bolts connecting the gasket 31 and the scraper ring 3 can be unscrewed, replaced with a new hanging ring, and fixed on the scraper 32 again.

[0176] When part or all of the horizontal tubes 2 fail or need to be replaced, the hose between the steam distribution unit 22 and the steam distributor 21 is disassembled, and then the heat exchange module including the steam distribution unit 22, a certain number of horizontal tubes 2, the condensate collection unit and the scraper 32 is removed one by one, and a large number of horizontal tubes 2 are split into a small number of modules for disassembly and installation, which reduces the difficulty of work and also reduces the time that personnel stay in the chamber, making the replacement of the horizontal tube 2 safer.

[0177] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed. However, as long as it is within the scope of the claims of the present application, it shall be protected by the patent law.

Claims

1. A horizontal tube falling film evaporator, wherein: Including internal heat exchange system and automatic descaling system; The internal heat exchange system includes a plurality of horizontal tubes for performing heat exchange processing; The automatic descaling system can remove the dirt generated on the horizontal tubes during the heat exchange process; The automatic descaling system comprises a scraping assembly capable of reciprocating movement, the scraping assembly being arranged on the outer periphery of the horizontal tube; and at least one scraping assembly is arranged on the outer periphery of each horizontal tube; The scraping assembly comprises a circular scraping ring, and the scraping ring is provided with an opening for dividing the scraping ring; The scraper assembly also includes gaskets respectively arranged on both sides of the scraper ring. The gasket and the scraper ring are detachably fixedly connected.

2. The evaporator according to claim 1, wherein: The scraping ring is stepped at the opening, and the thickness of the scraping rings at the connection points at both ends of the scraping rings that are embedded and connected to each other is equal to the overall thickness of the scraping ring.

3. The evaporator according to claim 1, wherein: The automatic descaling system further comprises a power assembly and a connection assembly, wherein the power assembly is used to drive the scraping assembly to move back and forth; and the connection assembly is used to connect the power assembly to the scraping assembly.

4. The evaporator according to claim 3, wherein: The power assembly includes a driving machine and a transmission part, wherein the driving machine drives the transmission part to operate; the transmission part is connected to the connecting assembly; The transmission part includes one of a chain drive, a gear rack drive, a belt drive, a ball screw, a trapezoidal screw, and a screw nut.

5. The evaporator according to claim 3, wherein: The connecting assembly comprises a fixed seat and a scraper, the fixed seat is connected to a power assembly, the power assembly drives the fixed seat to move back and forth, the scraper is mounted on the fixed seat; the scraping assembly is mounted on the scraper; Preferably, a plurality of scrapers are provided, both ends of the scrapers are respectively fixed on a fixing seat, and a plurality of scraping assemblies are fixed on the scrapers.

6. The evaporator according to claim 1, wherein: The evaporator further comprises a material distribution system, and the material distribution system is arranged above the internal heat exchange system; The material distribution system includes a spray pipe and a liquid distributor, wherein the spray pipe is arranged above the liquid distributor, and the liquid distributor can make the liquid in the liquid spray pipe flow evenly to the internal heat exchange system; Preferably, the spray pipe comprises a main inlet pipe for liquid to enter and a plurality of branch pipes capable of uniformly spraying the liquid into the liquid distributor; the main inlet pipe is connected to the branch pipes.

7. The evaporator according to claim 6, wherein: The liquid distributor comprises a baffle and a distribution assembly connected to the baffle; the baffle is arranged in an annular shape, and the distribution assembly is arranged inside the baffle near the lower end; a plurality of gaps for liquid to pass through are formed inside the distribution assembly; the gaps are dispersed between the baffles; The distribution assembly includes a plurality of tubes arranged side by side, and gaps are formed between the tubes for liquid to pass through; The tube body is one of a round tube, a half tube, an angle steel, and a square steel; Preferably, the pipe body and the horizontal pipe are both arranged horizontally, and a gap is formed between two adjacent half pipes and is located above the horizontal pipe.

8. The evaporator according to claim 1, wherein: The internal heat exchange system also includes a steam distributor and a condensate collector. The steam distributor is connected to the horizontal pipe and is used to pass heating steam into the horizontal pipe. The condensate collector is connected to the other end of the horizontal pipe and is used to collect condensate in the horizontal pipe. The lower end of the condensate collector is connected to a condensate discharge pipe. Preferably, a plurality of steam distribution units are arranged between the steam distributor and the horizontal tubes, the steam distribution units are respectively connected to a specific number of horizontal tubes, and the steam distribution units are connected to the steam distributor using a hose.

9. The evaporator according to claim 1, wherein: The evaporator further comprises a shell system, and the internal heat exchange system and the automatic descaling system are both arranged inside the shell system; The housing system comprises a cavity, a front cover plate and a rear cover plate. The cavity is fixedly connected to the rear cover plate. A quick-release assembly is provided between the front cover plate and the cavity. The front cover plate and the cavity are detachably connected.

10. The evaporator according to claim 9, wherein: The quick-release assembly includes a tightening hand wheel and a cover plate moving module, wherein the tightening hand wheel can tighten and loosen the cavity and the front cover plate; the cover plate moving module can move the front cover plate, and the front cover plate is also provided with a support frame that supports the cover plate when the cover plate moves; Preferably, a steam inlet for steam to enter and a condensed liquid outlet for condensed liquid to be discharged are provided on the cavity; The cavity is provided with a material inlet and a material outlet for material to enter and exit; The cavity is provided with a vacuum interface; The cavity is provided with a viewing mirror and a light source for observing the interior of the cavity; A magnetic fluid sealing interface for keeping the cavity sealed is arranged on the cavity; and a bottom supporting seat is arranged below the cavity.

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