A scraper-type thin film evaporation dehydrator and dehydration method

Abstract

The invention discloses a scraper-type thin film evaporation dehydrator and a dehydration method, comprising a main machine, the main machine is cylindrical, a rotary drive device is connected to the upper end cover of the main machine, the rotary drive device is connected to the main shaft, the main shaft extends into the main machine, an annular heating medium space is arranged in the side wall of the main machine, a vacuum isolation chamber, a wax liquid distributor and a heat-resistant scraper are arranged in the main machine from top to bottom, the vacuum isolation chamber is connected to a vacuum pump, a wax liquid feed port is arranged on the wax liquid distributor, the wax liquid feed port is connected to a wax liquid feed pipe, the heat-resistant scraper is connected to the main shaft, and the heat-resistant scraper is rotated to scrape the wax liquid into a thin film on the inner wall of the main machine; a wax liquid storage device is arranged at the bottom of the main machine, a second heating medium space is arranged between the inner and outer walls of the wax liquid storage device, a wax liquid discharge pipe is arranged at the bottom of the wax liquid storage device, the wax liquid discharge pipe is connected to the wax liquid feed port, and a heat-insulating wax liquid pump and a wax discharge pipe are arranged on the wax liquid discharge pipe. The present invention can remove water from the wax liquid, and has good dehydration effect and high efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of wax liquid dehydration equipment, in particular to a scraper-type thin film evaporation dehydrator and a dehydration method. Background Art

[0002] In medium temperature wax precision casting, water molecules cannot be mixed in the wax liquid, otherwise the solidified wax mold will produce many bubbles. If the bubbles exist on the surface of the wax mold, the quality of the mold shell made later will be affected, and the precision cast product will also be defective. The existing electric heating plate evaporation dehydration machine is composed of multiple hollow flat inclined plates. The molten wax liquid flows down on the inclined plate, and the inclined plate is heated to keep the high temperature so that the water molecules are evaporated. However, the inclined plate structure is not easy to make the wax liquid flow down evenly, and it is easy to form uneven wax liquid on the surface of the inclined plate, resulting in poor dehydration effect and low efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a scraper-type thin film evaporation dehydrator and a dehydration method to solve the problems existing in the above-mentioned prior art, which can remove water from wax liquid with good dehydration effect and high efficiency.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a scraper-type thin-film evaporation dewatering machine, comprising a main machine, the main machine is cylindrical, the top of the main machine is sealed and connected with an upper end cover, the upper end cover is connected with a rotation driving device, the output shaft of the rotation driving device is connected with a main shaft, and is used to drive the main shaft to rotate, the main shaft passes through the upper end cover and extends into the interior of the main machine, the main shaft and the upper end cover are rotatably and sealedly connected, an annular heating medium space is provided in the side wall of the main machine, the annular heating medium space is used to fill the heating medium, a vacuum isolation chamber, a wax liquid distributor and a heat-resistant scraper are sequentially provided in the main machine from top to bottom, the vacuum isolation chamber is connected to the vacuum device through a vacuum pumping pipe, the wax liquid can flow downward along the inner wall of the main machine through the wax liquid distributor, a wax liquid feed port is provided on the wax liquid distributor, the wax liquid feed port is connected with a wax liquid feed pipe, the heat-resistant scraper is connected to the main shaft, and the rotation of the main shaft drives the heat-resistant scraper to rotate, so that the wax liquid can be scraped into a thin film on the inner wall of the main machine;

[0006] A wax liquid storage device is provided at the bottom of the main engine, and the outlet at the bottom of the main engine is communicated with the inlet at the top of the wax liquid storage device and is sealed. A second heating medium space is provided between the inner and outer walls of the wax liquid storage device, and the second heating medium space is used to fill the heating medium. A wax liquid discharge pipe is provided at the bottom of the wax liquid storage device, and the wax liquid discharge pipe is connected to the wax liquid feed port. An insulation wax liquid pump and a wax discharge pipe are provided on the wax liquid discharge pipe, and the wax discharge pipe is located between the insulation wax liquid pump and the wax liquid feed port.

[0007] Preferably, the side wall of the main engine and the outer wall of the wax liquid storage tank are wrapped with a fire-resistant insulation layer, and each of the fire-resistant insulation layers is wrapped with a protective metal layer.

[0008] Preferably, the bottom of the main shaft is rotatably connected to a cross support frame via a bearing, the cross support frame is installed in the main machine, and an umbrella-shaped protective cover is also provided on the main shaft between the cross support frame and the heat-resistant scraper, and the opening of the umbrella-shaped protective cover is set downward.

[0009] Preferably, the wax liquid storage tank is provided with an observation window for observing the internal wax liquid condition; the wax liquid storage tank is provided with a liquid level gauge for detecting the liquid level of the internal heating medium; the wax liquid storage tank is provided with a thermocouple on the outer wall for detecting the temperature of the internal heating medium.

[0010] Preferably, the wax liquid feed pipe and the wax liquid discharge pipe are both double-layer heating pipes; and a filter is provided at the inlet end of the wax liquid feed pipe.

[0011] Preferably, a first medium circulation pipe connected to the annular heating medium space is respectively provided at the upper and lower ends of the main engine side wall, and a second medium circulation pipe connected to the second heating medium space is respectively provided at the upper and lower ends of the outer wall of the wax liquid storage device; when the heating medium is a liquid fluid, the first medium circulation pipe at the lower end and the second medium circulation pipe at the lower end are respectively connected to the two ends of the heating medium delivery pump, the first medium circulation pipe at the upper end and the second medium circulation pipe at the upper end are connected through a medium connecting pipe, a one-way check valve is provided on the pipeline between the first medium circulation pipe at the lower end and the heating medium delivery pump to prevent the heating medium from flowing back to the heating medium delivery pump from the first medium circulation pipe at the lower end, and an electric heater is provided at the bottom of the second heating medium space.

[0012] Preferably, when the heating medium is steam, the first medium circulation pipe at the lower end and the second medium circulation pipe at the upper end are both connected to the steam inlet pipe, the second medium circulation pipe at the lower end is provided with a condensate discharge valve, and the first medium circulation pipe at the upper end is provided with a safety valve.

[0013] Preferably, a first control valve is provided on the wax liquid feed pipe, and a second control valve is provided on the wax liquid discharge pipe, the second control valve is located between the wax discharge pipe and the wax liquid feed port, the wax discharge pipe is provided with a wax discharge valve, and the wax liquid discharge pipe is also provided with a residual wax discharge pipe, the residual wax discharge pipe is located between the wax discharge pipe and the insulation wax liquid pump, and the residual wax discharge pipe is provided with a residual wax discharge valve.

[0014] Preferably, it also includes a box body, and the main engine, the wax liquid storage device, the insulation wax liquid pump and the heating medium delivery pump are all arranged in the box body. The front, back, left side and right side of the box body are all provided with switch doors. The front of the box body is also provided with an electric control box, and the upper end of the back of the box body is provided with compressed air holes and power cord holes. The upper end of the left side of the box body is provided with a feed hole, and the feed hole is connected to the inlet end of the wax liquid feed pipe. The upper end of the right side of the box body is provided with a wax liquid outlet and a vacuum connecting pipe, and the wax liquid outlet is connected to the wax exhaust pipe. The vacuum pipe is connected to the vacuum device through the vacuum connecting pipe.

[0015] The present invention also provides a scraper-type thin film evaporation dehydration method, which uses the scraper-type thin film evaporation dehydration machine described above, and comprises the following steps:

[0016] S1: heating the heating medium in the annular heating medium space and the second heating medium space to a set temperature and keeping it constant;

[0017] S2: closing the wax liquid discharge pipe, opening the wax liquid feed pipe, adding wax liquid into the main machine, and starting the rotary drive device and the vacuum device at the same time, so that the wax liquid falls into the wax liquid storage tank;

[0018] S3: After the wax liquid rises to a specified liquid level in the wax liquid storage device, the wax liquid feed pipe is closed, the wax liquid discharge pipe is opened, and the heat-insulating wax liquid pump is started to transport the wax liquid in the wax liquid storage device to the wax liquid distributor through the wax liquid discharge pipe, and the wax liquid flows downward along the inner wall of the main machine through the wax liquid distributor, and the heat-resistant scraper rotates to scrape the wax liquid into a thin film on the inner wall of the main machine, and performs dehydration treatment under a constant temperature and vacuum environment;

[0019] S4: When the wax liquid in the wax liquid storage device does not boil, the dehydration is completed, and the wax liquid in the wax liquid storage device from which the water has been removed is discharged from the wax discharge pipe.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] The present invention provides a scraper-type thin-film evaporation dehydration machine and a dehydration method. After the wax liquid is scraped into a thin film on the inner wall of a main machine by a heat-resistant scraper, a vacuum device is used to make it easier for the water in the wax liquid to be removed, thereby removing the water in the wax liquid and improving the dehydration effect and dehydration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic cross-sectional view of a portion of the structure of the scraper-type thin film evaporation dehydrator provided by the present invention;

[0024] Figure 2 A top view of the structural arrangement inside the box of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the present invention when looking down at the box body;

[0026] Figure 4 It is a front structural schematic diagram of the box body in the present invention;

[0027] Figure 5 It is a schematic diagram of the back structure of the box body in the present invention;

[0028] Figure 6 It is a schematic diagram of the left side structure of the box body in the present invention;

[0029] Figure 7 It is a schematic diagram of the right side structure of the box body in the present invention;

[0030] Figure 8 This is a schematic diagram of the structural connection between the host and the wax liquid storage when the heating medium is a liquid fluid in the present invention;

[0031] Fig. 9 This is a schematic diagram of the structural connection between the host and the wax liquid storage when the heating medium is steam in the present invention;

[0032] In the figure: 1-main machine; 2-upper end cover; 3-rotation drive device; 4-main shaft; 5-annular heating medium space; 6-vacuum isolation chamber; 7-wax liquid distributor; 8-heat-resistant scraper; 9-vacuum pipe; 10-wax liquid feeding pipe; 11-wax liquid storage; 12-second heating medium space; 13-observation window; 14-wax liquid discharge pipe; 15-insulation wax liquid pump; 16-wax discharge pipe; 17-refractory insulation layer; 18-cross support frame; 19-umbrella-shaped protective cover; 20-liquid level gauge; 21-filter; 22-first medium circulation pipe; 23-second medium circulation pipe; 24-medium connecting pipe; 25-heating medium Mass transfer pump; 26-thermocouple; 27-electric heater; 28-first control valve; 29-second control valve; 30-wax discharge valve; 31-residual wax discharge pipe; 32-residual wax discharge valve; 33-box; 34-switch door; 35-electric control box; 36-compressed air hole; 37-power cord hole; 38-feed hole; 39-wax liquid outlet; 40-vacuum pipe; 41-base; 42-reduction motor bracket; 43-vacuum sealing cover; 44-heating medium distributor; 45-oil drain valve; 46-wax liquid feed port, 47-one-way check valve, 48-steam inlet pipe, 49-condensate discharge valve, 50-safety valve. DETAILED DESCRIPTION

[0033] 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.

[0034] The purpose of the present invention is to provide a scraper-type thin film evaporation dehydrator and a dehydration method to solve the problems existing in the prior art, and can remove water from wax liquid with good dehydration effect and high efficiency.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1-Figure 9As shown, this embodiment provides a scraper-type thin film evaporation dehydrator, including a main unit 1, which is cylindrical, and the top of the main unit 1 is sealed and connected with an upper end cover 2, and the upper end cover 2 is connected with a rotation drive device 3, the output shaft of the rotation drive device 3 is connected with a main shaft 4, and is used to drive the main shaft 4 to rotate, and the main shaft 4 passes through the upper end cover 2 and extends into the inside of the main unit 1, and the main shaft 4 is rotatably and sealedly connected with the upper end cover 2, and an annular heating medium space 5 is provided in the side wall of the main unit 1, and the annular heating medium space 5 is used to fill the heating medium, and a vacuum isolation chamber 6, a wax liquid distributor 7 and a heat-resistant scraper 8 are sequentially arranged in the main unit 1 from top to bottom, and the vacuum isolation chamber 6 is connected to the vacuum device through a vacuum pipe 9, and the wax liquid distributor 7 can make the wax liquid flow downward along the inner wall of the main unit 1, and a wax liquid feed port 46 is provided on the wax liquid distributor 7, and the wax liquid feed port 46 is connected to the wax liquid feed pipe 10, and the heat-resistant scraper 8 is connected to the main shaft 4, and the rotation of the main shaft 4 drives the heat-resistant scraper 8 to rotate, so that the wax liquid can be scraped into a thin film on the inner wall of the main unit 1;

[0037] A wax liquid storage device 11 is provided at the bottom of the main unit 1, and the bottom outlet of the main unit 1 is connected to the top inlet of the wax liquid storage device 11 and is sealed. A second heating medium space 12 is provided between the inner and outer walls of the wax liquid storage device 11, and the second heating medium space 12 is used to fill the heating medium. A wax liquid discharge pipe 14 is provided at the bottom of the wax liquid storage device 11, and the wax liquid discharge pipe 14 is connected to the wax liquid feed port 46. An insulation wax liquid pump 15 and a wax discharge pipe 16 are provided on the wax liquid discharge pipe 14, and the wax discharge pipe 16 is located between the insulation wax liquid pump 15 and the wax liquid feed port 46.

[0038] When in use, the wax liquid is fed into the main unit 1 by the wax liquid distributor 7, flows downward along the inner wall of the main unit 1, and scraped into a thin film on the inner wall of the main unit 1 by the heat-resistant scraper 8. Under the heating effect of the heating medium and the vacuum effect, the water in the wax liquid film is easier to escape, thereby achieving the purpose of dehydration and improving the dehydration effect and dehydration efficiency. Among them, the wax liquid dehydration treatment temperature is determined according to its softening point, drop melting point and viscosity, the rotary drive device 3 can select a reduction motor, the output shaft of the reduction motor is connected to the main shaft 4 through a coupling, and the reduction motor is installed on the upper end cover 2 through the reduction motor bracket 42. The vacuum device can select a vacuum pump, and a vacuum sealing cover 43 is provided at the connection between the upper end cover 2 and the main shaft 4 to ensure the sealing effect between the main shaft 4 and the upper end cover 2. The setting of the vacuum isolation chamber 6 can prevent the wax liquid from falling into the vacuum pump.

[0039] In this embodiment, the side wall of the main machine 1 and the outer wall of the wax liquid storage 11 are wrapped with a fire-resistant insulation layer 17, and each fire-resistant insulation layer 17 is wrapped with a protective metal layer. The fire-resistant insulation layer 17 can play a heat-insulating effect, reduce the heat loss of the heating medium, and the protective metal layer can protect the fire-resistant insulation layer 17. Among them, the side wall of the main machine 1 is made of an inner and outer two-layer structure, the inner layer is made of a seamless stainless steel pipe, and the upper and lower ends of the stainless steel pipe are welded with mounting flanges. The upper flange is fastened together with the upper end cover 2 by bolts. An annular groove is provided on the upper end surface of the upper flange, and a sealing ring is installed in the annular groove to ensure the sealing between the upper end cover 2 and the main machine 1; a cylindrical outer layer made of boiler steel plate is provided outside the inner layer, and an annular heating medium space 5 is formed between the inner layer and the outer layer. The upper and lower ends of the annular heating medium space 5 are welded with the same material head to achieve sealing. The part of the inner wall of the wax liquid storage device 11 that is directly in contact with the wax liquid is welded with stainless steel plates, and the outer wall is welded with boiler steel plates. A certain gap is reserved between the inner wall and the outer wall to form a second heating medium space 12. The upper head and the lower head of the inner wall are both made of stainless steel plates. A circular hole with the same diameter as the inner cylinder of the main engine 1 is opened in the middle of the upper head. The upper head is connected to the wax liquid storage device inlet flange through a stainless steel short tube. The lower end of the stainless steel short tube is butt-welded to the circular hole in the upper head, and the upper end is welded to the wax liquid storage device inlet flange. Four steel plates are evenly welded on the outer wall of the stainless steel short tube along the circumference. The four steel plates can strengthen the support of the wax liquid storage device inlet flange above it. The wax liquid storage device inlet flange is sealed and connected to the lower end flange of the main engine 1. A sealing ring is provided between the wax liquid storage device inlet flange and the lower end flange of the main engine 1 to ensure the sealing effect.

[0040] In this embodiment, the bottom of the main shaft 4 is rotatably connected to the cross support frame 18 through a bearing, and the cross support frame 18 is installed in the main machine 1. An umbrella-shaped protective cover 19 is also provided on the main shaft 4 between the cross support frame 18 and the heat-resistant scraper 8, and the opening of the umbrella-shaped protective cover 19 is set downward. Through the setting of the cross support frame 18, it is ensured that the main shaft 4 coincides with the center line of the cylinder of the main machine 1, so that the heat-resistant scraper 8 can scrape out a uniform film and quickly remove moisture. The umbrella-shaped protective cover 19 can prevent the wax liquid from entering the bearing on the cross support frame 18, and prevent the wax liquid from entering the bearing and solidifying, causing the bearing to be unable to rotate and causing equipment failure.

[0041] In this embodiment, the wax liquid storage 11 is provided with an observation window 13 for observing the wax liquid inside; the wax liquid storage 11 is provided with a liquid level meter 20 for detecting the liquid level of the internal heating medium; and the outer wall of the wax liquid storage 11 is provided with a thermocouple 26 for detecting the temperature of the internal heating medium. Among them, the liquid level meter 20 is mainly used to detect the liquid level of the liquid fluid when the heating medium is a liquid fluid. Through the observation window 13, it can be observed whether the wax liquid has boiling phenomenon during the dehydration process. If the wax liquid does not boil, it can be determined that the wax liquid has been dehydrated.

[0042] In this embodiment, both the wax liquid feed pipe 10 and the wax liquid discharge pipe 14 are double-layer heating pipes; a filter 21 is provided at the inlet end of the wax liquid feed pipe 10. The double-layer heating pipe can heat and insulate the wax liquid while conveying it, so as to prevent the wax liquid from solidifying due to the temperature drop. The double-layer heating pipe uses hot water for heating and insulation. Impurities in the wax liquid can be filtered through the filter 21 to ensure the effect of the dehydration treatment. Before each operation, the condition of the filter 21 should be checked, and if it is found to be blocked or damaged, it should be cleaned or replaced immediately.

[0043] In this embodiment, a first medium circulation pipe 22 connected to the annular heating medium space 5 is respectively provided at the upper and lower ends of the side wall of the main unit 1, and a second medium circulation pipe 23 connected to the second heating medium space 12 is respectively provided at the upper and lower ends of the outer wall of the wax liquid storage device 11; when the heating medium is a liquid fluid, the first medium circulation pipe 22 at the lower end and the second medium circulation pipe 23 at the lower end are respectively connected to the two ends of the heating medium delivery pump 25, and the first medium circulation pipe 22 at the upper end is connected to the second medium circulation pipe 23 at the upper end through a medium connecting pipe 24. A one-way check valve 47 is provided on the pipeline between the first medium circulation pipe at the lower end and the heating medium delivery pump to prevent the heating medium from flowing back to the heating medium delivery pump 25 from the first medium circulation pipe 22 at the lower end. An electric heater 27 is provided at the bottom of the second heating medium space 12, and the liquid fluid is heated by the electric heater 27, and the liquid fluid is circulated and delivered by the heating medium delivery pump 25.

[0044] In this embodiment, when the heating medium is steam, the first medium circulation pipe 22 at the lower end and the second medium circulation pipe 23 at the upper end are both connected to the steam inlet pipe 48, and a condensate discharge valve 49 is provided on the second medium circulation pipe 23 at the lower end, and a safety valve 50 is provided on the first medium circulation pipe 22 at the upper end, which not only ensures the safety of the equipment, but also can discharge condensate and ensure the smooth flow of the heating space and the circulation pipeline.

[0045] In this embodiment, a first control valve 28 is provided on the wax liquid feed pipe 10, and a second control valve 29 is provided on the wax liquid discharge pipe 14. The second control valve 29 is located between the wax discharge pipe 16 and the wax liquid feed port 46. A wax discharge valve 30 is provided on the wax discharge pipe 16. A residual wax discharge pipe 31 is also provided on the wax liquid discharge pipe 14. The residual wax discharge pipe 31 is located between the wax discharge pipe 16 and the insulation wax liquid pump 15. A residual wax discharge valve 32 is provided on the residual wax discharge pipe 31. The feed of the wax liquid feed pipe 10 can be controlled by switching the first control valve 28, and whether the wax liquid in the wax liquid storage device 11 is transported back to the main unit 1 can be controlled by switching the second control valve 29. The wax discharge is controlled by switching the wax discharge valve 30 to deliver the wax liquid to a designated location. After the wax discharge is completed, the discharge of the residual wax liquid is controlled by switching the residual wax discharge valve 32 to discharge the residual wax liquid in the pipeline and the insulation wax liquid pump 15. When discharging, the residual wax liquid is placed in a special container or ingot mold.

[0046] In this embodiment, a box body 33 is also included, in which the main machine 1, the wax liquid storage device 11, the heat preservation wax liquid pump 15 and the heating medium delivery pump 25 are all arranged. The front, back, left and right sides of the box body 33 are all provided with switch doors 34. The front side of the box body 33 is also provided with an electric control box 35. The upper end of the back side of the box body 33 is provided with a compressed air hole 36 and a power line hole 37. The upper end of the left side of the box body 33 is provided with a feed hole 38, which is connected to the inlet end of the wax liquid feed pipe 10. The upper end of the right side of the box body 33 is provided with a wax liquid outlet 39 and a vacuum pipe 40, which is connected to the wax discharge pipe 16. The vacuum pipe 9 is connected to the vacuum device through the vacuum pipe 40. Among them, a base 41 is provided at the bottom of the box body 33, and the main machine 1, the wax liquid storage device 11, the heat preservation wax liquid pump 15 and the heating medium delivery pump 25 are all installed on the base 41. The top surface of the box 33 is provided with a hole, and the reduction motor is exposed outside the box 33 through the hole. The electric control box 35 is equipped with a main power switch, a programmable controller, an AC relay and other related electrical components. The panel of the electric control box 35 is provided with a touch screen, a temperature control instrument, a power indicator light, a manual-automatic switch, an automatic start button, a reset button and various manual operation buttons. Various process parameters can be input into the programmable controller through the electric control box 35, and the dehydration process can be automatically controlled by the programmable controller. The dehydration process can be manually controlled by the manual operation buttons. Through the switch doors 34, it is convenient to operate and observe the internal structure, and it is convenient to repair and replace. All electrical wires in the dehydrator are arranged with bridges and wire troughs, and the signal lines for signal transmission are all shielded wires. In addition to using thermocouples to measure and control temperature, the electric heating system of the equipment is also provided with a secondary temperature measurement protection device near the electric heater 27. An alarm is installed on the upper part of the box 33. When the temperature exceeds a certain value and the power is still not cut off, it will automatically alarm to prompt the operator to manually cut off the power. The compressed air hole 36 is connected to the internal pneumatic control valve through a pipeline, and is connected to the compressed air source outside to facilitate the control of each pneumatic control valve. At the same time, compressed air can be injected into the box body 33 through the compressed air hole 36, so that the internal hygiene can be cleaned by compressed air.

[0047] A scraper-type thin film evaporation dehydration method, using the scraper-type thin film evaporation dehydration machine described above, comprises the following steps:

[0048] S1: heating the heating medium in the annular heating medium space 5 and the second heating medium space 12 to a set temperature and keeping it constant;

[0049] S2: Close the wax liquid discharge pipe 14, open the wax liquid feed pipe 10, add wax liquid into the main machine 1, and start the rotary drive device 3 and the vacuum device at the same time, so that the wax liquid falls into the wax liquid storage tank 11;

[0050] S3: After the wax liquid rises to a specified liquid level in the wax liquid storage tank 11, the wax liquid feed pipe 10 is closed, the wax liquid discharge pipe 14 is opened, and the heat-insulating wax liquid pump 15 is started to transport the wax liquid in the wax liquid storage tank 11 to the wax liquid distributor 7 through the wax liquid discharge pipe 14, and the wax liquid flows downward along the inner wall of the main machine 1 through the wax liquid distributor 7, and the heat-resistant scraper 8 rotates to scrape the wax liquid on the inner wall of the main machine 1 into a thin film, and dehydration treatment is performed under a constant temperature and vacuum environment;

[0051] S4: When the wax liquid in the wax liquid storage device 11 does not boil, the dehydration is completed, and the wax liquid in the wax liquid storage device 11 from which the water has been removed is discharged from the wax discharge pipe 16.

[0052] The following is the specific operating procedure of this water remover:

[0053] 1. Operation preparation

[0054] 1. Close all valves connected to host 1;

[0055] 2. Power on the vacuum pump and start it. Observe all the sealing parts of the machine to see if there are any leaks. If there are any leaks, ask a professional to repair them. If there are no leaks, continue to check other aspects.

[0056] 3. Supply power to the electric heater 27 and check whether the heating system and the medium conveying system are working normally. If they are working normally, supply power to the reduction motor and check whether the heat-resistant scraper 8 is working normally;

[0057] 4. If all parts of the machine work normally and the wax liquid to be treated meets the requirements of the treatment process, normal dehydration operations can be carried out.

[0058] 2. Manual processing procedures

[0059] 1. Switch the manual-automatic switch to the manual position, start the electric heater 27 for heating, and when the temperature of the heating medium reaches the degree required by the process, start the heating medium delivery pump 25. When the temperature is constant, proceed to the next step;

[0060] 2. Close the second control valve 29 on the wax liquid discharge pipe 14, open the first control valve 28 on the wax liquid feed pipe 10, start the reduction motor and the vacuum pump, and observe the internal situation of the wax liquid storage 11 through the observation window 13. When the vacuum degree reaches a certain level, you can see wax liquid falling from the wax liquid storage 11;

[0061] 3. When the wax liquid level in the wax liquid storage tank 11 rises to a specified level, the first control valve 28 is closed and the second control valve 29 is opened;

[0062] 4. Start the wax liquid insulation pump 15, and the wax liquid in the wax liquid storage tank 11 is transported to the host 1 for dehydration treatment;

[0063] 5. When it is observed that the wax liquid in the wax liquid storage tank 11 is not boiling, the wax liquid insulation pump 15 is stopped and the second control valve 29 is closed;

[0064] 6. Shut down the vacuum pump, open the wax discharge valve 30, start the wax liquid insulation pump 15, and transport the wax liquid that has been dehydrated in the wax liquid storage 11 to the designated location. After the transport is completed, stop the wax liquid insulation pump 15, and then open the residual wax discharge valve 32 to discharge the residual wax liquid;

[0065] 7. If you need to continue to process the wax liquid, repeat the above steps 1-6.

[0066] 3. Automatic processing process

[0067] 1. First, manually process the wax liquid, summarize the process parameters of each stage, and determine the operating parameters;

[0068] 2. Professional technicians input various process parameters into the programmable controller;

[0069] 3. Turn on the main power switch and the power indicator light will light up;

[0070] 4. Power the electric heater 27. When the temperature reaches the specified temperature, start the heating medium delivery pump 25 and run it for 10 minutes.

[0071] 5. Check whether the wax liquid to be treated meets the requirements;

[0072] 6. When the wax liquid dehydration conditions meet the requirements, press the automatic start button, and the equipment will automatically process the wax liquid according to the set process parameters. The operator should always pay attention to the operating status of the equipment and must not leave the post without permission;

[0073] 7. If any abnormal situation is found, press the emergency stop button immediately and ask professionals to repair it;

[0074] 8. After each treatment is successfully completed, the wax liquid remaining in the host 1, wax liquid storage tank 11 and pipeline should be cleaned up;

[0075] 9. If you need to continue processing the wax liquid, you should follow the above operating procedures 1-8.

[0076] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A scraper-type thin film evaporation dehydrator, characterized in that: The main body comprises a main body, which is cylindrical, and an upper end cover is sealed and connected to the top of the main body, and a rotation driving device is connected to the upper end cover, and an output shaft of the rotation driving device is connected to the main shaft for driving the main shaft to rotate, and the main shaft passes through the upper end cover and extends into the interior of the main body, and the main shaft is rotatably and sealedly connected to the upper end cover, and an annular heating medium space is provided in the side wall of the main body, and the annular heating medium space is used to fill the heating medium, and a vacuum isolation chamber, a wax liquid distributor and a heat-resistant scraper are sequentially provided in the main body from top to bottom, and the vacuum isolation chamber is connected to the vacuum device through a vacuum pipe, and the wax liquid can flow downward along the inner wall of the main body through the wax liquid distributor, and a wax liquid feed port is provided on the wax liquid distributor, and the wax liquid feed port is connected to the wax liquid feed pipe, and the heat-resistant scraper is connected to the main shaft, and the rotation of the main shaft drives the heat-resistant scraper to rotate, so that the wax liquid can be scraped into a thin film on the inner wall of the main body; A wax liquid reservoir is provided at the bottom of the main engine, the outlet at the bottom of the main engine is communicated with the inlet at the top of the wax liquid reservoir and is sealed, a second heating medium space is provided between the inner and outer walls of the wax liquid reservoir, the second heating medium space is used to fill the heating medium, a wax liquid discharge pipe is provided at the bottom of the wax liquid reservoir, the wax liquid discharge pipe is connected to the wax liquid feed port, an insulation wax liquid pump and a wax discharge pipe are provided on the wax liquid discharge pipe, and the wax discharge pipe is located between the insulation wax liquid pump and the wax liquid feed port; The side wall of the main engine and the outer wall of the wax liquid storage are wrapped with a fire-resistant insulation layer, and each of the fire-resistant insulation layers is wrapped with a protective metal layer; The bottom of the main shaft is rotatably connected to a cross support frame through a bearing, and the cross support frame is installed in the main machine. An umbrella-shaped protective cover is also provided on the main shaft between the cross support frame and the heat-resistant scraper, and the opening of the umbrella-shaped protective cover is arranged downward.

2. The scraper-type thin film evaporation dehydrator according to claim 1, characterized in that: The wax liquid storage device is provided with an observation window for observing the internal wax liquid condition; the wax liquid storage device is provided with a liquid level gauge for detecting the liquid level of the internal heating medium; the outer wall of the wax liquid storage device is provided with a thermocouple for detecting the temperature of the internal heating medium.

3. The scraper-type thin film evaporation dehydrator according to claim 1, characterized in that: The wax liquid feeding pipe and the wax liquid discharging pipe are both double-layer heating pipes; and a filter is provided at the inlet end of the wax liquid feeding pipe.

4. The scraper-type thin film evaporation dehydrator according to claim 1, characterized in that: A first medium circulation pipe connected to the annular heating medium space is respectively provided at the upper and lower ends of the main engine side wall, and a second medium circulation pipe connected to the second heating medium space is respectively provided at the upper and lower ends of the outer wall of the wax liquid storage device; when the heating medium is a liquid fluid, the first medium circulation pipe at the lower end and the second medium circulation pipe at the lower end are respectively connected to the two ends of the heating medium delivery pump, the first medium circulation pipe at the upper end and the second medium circulation pipe at the upper end are connected through a medium connecting pipe, a one-way check valve is provided on the pipeline between the first medium circulation pipe at the lower end and the heating medium delivery pump to prevent the heating medium from flowing back to the heating medium delivery pump from the first medium circulation pipe at the lower end, and an electric heater is provided at the bottom of the second heating medium space.

5. The scraper-type thin film evaporation dehydrator according to claim 4, characterized in that: When the heating medium is steam, the first medium circulation pipe at the lower end and the second medium circulation pipe at the upper end are both connected to the steam inlet pipe, the second medium circulation pipe at the lower end is provided with a condensate discharge valve, and the first medium circulation pipe at the upper end is provided with a safety valve.

6. The scraper-type thin film evaporation dehydrator according to claim 4, characterized in that: The wax liquid feed pipe is provided with a first control valve, the wax liquid discharge pipe is provided with a second control valve, the second control valve is located between the wax discharge pipe and the wax liquid feed port, the wax discharge pipe is provided with a wax discharge valve, the wax liquid discharge pipe is also provided with a residual wax discharge pipe, the residual wax discharge pipe is located between the wax discharge pipe and the insulation wax liquid pump, and the residual wax discharge pipe is provided with a residual wax discharge valve.

7. The scraper-type thin film evaporation dehydrator according to claim 6, characterized in that: It also includes a box body, the main engine, the wax liquid storage device, the insulation wax liquid pump and the heating medium delivery pump are all arranged in the box body, the front, back, left side and right side of the box body are all provided with switch doors, the front of the box body is also provided with an electric control box, the upper end of the back of the box body is provided with compressed air holes and power cord holes, the upper end of the left side of the box body is provided with a feed hole, the feed hole is connected to the inlet end of the wax liquid feed pipe, the upper end of the right side of the box body is provided with a wax liquid outlet and a vacuum connecting pipe, the wax liquid outlet is connected to the wax exhaust pipe, and the vacuum pipe is connected to the vacuum device through the vacuum connecting pipe.

8. A scraper-type thin film evaporation dewatering method, characterized in that: The scraper-type thin film evaporation dehydrator according to any one of claims 1 to 7 comprises the following steps: S1: heating the heating medium in the annular heating medium space and the second heating medium space to a set temperature and keeping it constant; S2: closing the wax liquid discharge pipe, opening the wax liquid feed pipe, adding wax liquid into the main machine, and starting the rotary drive device and the vacuum device at the same time, so that the wax liquid falls into the wax liquid storage tank; S3: After the wax liquid rises to a specified liquid level in the wax liquid storage device, the wax liquid feed pipe is closed, the wax liquid discharge pipe is opened, and the heat-insulating wax liquid pump is started to transport the wax liquid in the wax liquid storage device to the wax liquid distributor through the wax liquid discharge pipe, and the wax liquid flows downward along the inner wall of the main machine through the wax liquid distributor, and the heat-resistant scraper rotates to scrape the wax liquid into a thin film on the inner wall of the main machine, and performs dehydration treatment under a constant temperature and vacuum environment; S4: When the wax liquid in the wax liquid storage device does not boil, the dehydration is completed, and the wax liquid in the wax liquid storage device from which the water has been removed is discharged from the wax discharge pipe.

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