One-time passing type vacuum wax filter

Abstract

The utility model provides a one-time passing type vacuum wax filter, which relates to the technical field of chemical engineering and comprises a control system, a driving device and a filtering device, the filtering device comprises a filter and a vacuum separator which are sequentially arranged between a wax inlet and a wax outlet, and the control system comprises a plurality of control assemblies and a plurality of detection assemblies. By arranging the control assembly and the detection assembly, the amount of the residual wax liquid in the filtering equipment is detected, and the driving equipment is controlled to be started or stopped, so that the wax liquid is automatically and continuously treated, the time cost is reduced, the efficiency is improved, the operation and the maintenance are convenient, and personnel watching is not needed; the whole wax liquid recycling and filtering link is automatically and continuously operated and does not need to be manually watched and operated, the filtered and recycled wax liquid is clean, the water content is accurate, the loss of the wax liquid is reduced, the quality of the wax liquid is improved, and the service life and period of the wax liquid are prolonged.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and more specifically, to a one-pass vacuum wax filter. Background Technology

[0002] In the precision casting industry, medium-temperature wax, when used repeatedly, produces slag powder, ash, and coking products larger than 350-1000 mesh. Due to their small particle size and mixing with liquid wax, the wax liquid contains a large amount of steam condensate after dewaxing and discharge, influenced by the viscosity and flow characteristics of the wax. Traditional steam backflushing filters and bag filters cannot completely remove slag powder, ash, and coking products from the wax liquid. Traditional vacuum separation devices require quantitative stirring or circulation in a vacuum container during the wax filtration process. Each step is relatively independent, and the next step can only be started after the previous step is completed. This makes it impossible to continuously filter the wax liquid, and each step requires manual machine startup, which is time-consuming and inefficient. Utility Model Content

[0003] The purpose of this invention is to address the problems in the prior art by providing a one-pass vacuum wax filter that can automatically and continuously complete the wax filtering process, thereby reducing time costs and improving efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a one-pass vacuum wax filter, including a control system, a drive device, and a filtration device. The filtration device includes a filter and a vacuum separator arranged sequentially between the wax inlet and the wax outlet. The filter is used to filter impurities in the wax liquid, and the vacuum separator is used to filter moisture in the wax liquid.

[0006] The driving device includes a wax inlet pump, a circulation pump, and a wax outlet pump. The wax inlet pump is disposed between the wax inlet and the filter, and is used to drive the wax liquid from the wax inlet into the filter. The circulation pump is disposed between the filter and the vacuum separator, and is used to drive the wax liquid from the filter into the vacuum separator. The wax outlet pump is disposed between the vacuum separator and the wax outlet, and is used to drive the wax liquid from the vacuum separator into the wax outlet.

[0007] The control system includes several control components and several detection components. The detection components are used to detect the amount of wax liquid in one of the filtering devices and transmit it to the corresponding control component. The control component controls the corresponding driving device to turn on or off.

[0008] Optionally, the wax inlet end of the wax inlet is provided with a wax storage tank, and the detection component includes a first detection component disposed in the wax storage tank. The first detection component is used to detect the amount of wax in the wax storage tank and send it to a first control component. The first control component is used to control the wax pump to shut down.

[0009] Optionally, the filter includes a filter element and a buffer tank, the filter element being used to filter impurities in the wax liquid, and the buffer tank being used to buffer the wax liquid filtered by the filter element;

[0010] The detection component includes a second detection component disposed within the buffer tank. The second detection component is used to detect the amount of wax in the buffer tank and send it to a second control component. The second control component is used to control the circulation pump to shut down.

[0011] Optionally, the vacuum separator is provided with a vacuum chamber, which includes an evaporation chamber and a wax chamber located below the evaporation chamber. The evaporation chamber is used to evaporate the water in the wax liquid, and the wax chamber is used to store the wax liquid after being processed by the evaporation chamber.

[0012] The detection component includes a third detection component disposed in the wax chamber. The third detection component is used to detect the amount of wax in the buffer tank and send it to a third control component. The third control component is used to control the wax pump to start or stop.

[0013] Optionally, the drive device further includes a vacuum pump connected to the vacuum chamber, the vacuum pump being used to extract air from the vacuum chamber;

[0014] The second detection component sends the amount of wax in the buffer tank to the fourth control component, which controls the vacuum pump to shut down.

[0015] Optionally, the wax liquid is transported in a wax liquid pipeline, the outer layer of the wax liquid pipeline is provided with a heat-insulating pipeline, and a heat-conducting oil is provided between the heat-insulating pipeline and the wax liquid pipeline. The heat-insulating pipeline is connected to a heat-conducting oil pump unit through a heat-conducting oil pipeline to maintain the temperature of the wax liquid stable.

[0016] Optionally, the inlet of the vacuum separator is located at the top, and a primary rinsing plate and a secondary rinsing plate are arranged sequentially between the inlet and the vacuum chamber, so that the wax liquid enters the vacuum chamber after passing through the primary rinsing plate and the secondary rinsing plate in sequence.

[0017] Optionally, a heating component and a cooling component are provided outside the vacuum separator to control the operating temperature of the vacuum separator by adjusting the heating component and the cooling component.

[0018] The beneficial effects of the one-pass vacuum wax filter provided by this utility model include: The wax filter provided by this utility model includes a control system, a drive device, and a filtration device. The filtration device includes a filter and a vacuum separator arranged sequentially between the wax inlet and the wax outlet. The filter is used to filter impurities in the wax liquid, and the vacuum separator is used to filter moisture in the wax liquid. The control system includes several control components and several detection components. The detection components are used to detect the amount of wax liquid in one of the filtration devices and transmit it to the corresponding control component. The control component controls the corresponding drive device to open or close. This wax filter can automatically and continuously complete the wax filtration process, reducing time costs and improving efficiency. It is easy to operate and maintain. It can automatically complete the wax filtration process after one-button start-up without human supervision. The wax liquid is automatically transported from the wax outlet to the designated settling tank through the pipeline. The entire wax liquid recovery and filtration process is automated and continuous without human supervision or operation. The filtered and recovered wax liquid is clean, has an accurate water content, reduces wax liquid loss, improves wax liquid quality, and extends the service life and cycle of wax liquid. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is one of the structural schematic diagrams of a one-pass vacuum wax filter provided in an embodiment of this application;

[0021] Figure 2 A second schematic diagram of the support frame for a one-pass vacuum wax filter provided in this application embodiment;

[0022] Figure 3 This is the third schematic diagram of the support frame of a one-pass vacuum wax filter provided in the embodiments of this application.

[0023] Icons: 1. Load-bearing base; 2. Heat transfer oil pump set; 3. Vacuum separator; 4. Wax inlet pump; 5. Wax liquid pipeline; 6. Constant temperature pipeline; 7. Circulating wax pump; 8. Sampling port; 9. Filter; 10. Cooler; 11. Vacuum pump; 12. Cooling water tank; 13. Wax outlet pump; 14. Heat transfer oil pipeline; 15. Heater set; 16. Wax inlet; 17. Wax outlet. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. It should be noted that, without conflict, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0025] In the precision casting industry, the repeated use of medium-temperature wax generates particles larger than 350-1000 mesh, such as gypsum powder, ash, and coking compounds. Due to their small particle size and mixing with liquid wax, these particles, influenced by the viscosity and flow characteristics of the wax, result in a large amount of steam condensate remaining in the wax liquid after dewaxing and discharge in the dewaxing vessel. Traditional steam backflushing filters and bag filters cannot completely remove the gypsum powder, ash, and coking compounds from the wax liquid. Traditional vacuum separation devices require quantitative stirring or circulation in a vacuum container during the wax filtration process, with each step relatively independent and only starting the next step after completion. This prevents continuous filtration of the wax liquid, and each step requires manual machine startup, resulting in long processing times and low efficiency. To address these issues, this application provides a one-pass vacuum wax filter that can automatically and continuously complete the wax filtration process, reducing time costs and improving efficiency.

[0026] like Figure 1 , Figure 2 and Figure 3As shown in the figure, this application embodiment provides a one-pass vacuum wax filter, including a control system, a drive device, and a filter device mounted on a load-bearing base 1. The filter device includes a filter 9 and a vacuum separator 3 sequentially disposed between a wax inlet 16 and a wax outlet 17. The filter 9 is used to filter impurities in the wax liquid, and the vacuum separator 3 is used to filter moisture in the wax liquid. The drive device includes a wax inlet pump 4, a circulation pump 7, and a wax outlet pump 13. The wax inlet pump 4 is disposed between the wax inlet 16 and the filter 9, and is used to drive the wax liquid from the wax inlet 16 into the filter 9. The circulation pump 7 is disposed between the filter 9 and the vacuum separator 3, and is used to drive the wax liquid from the filter 9 into the vacuum separator 3. The wax outlet pump 13 is disposed between the vacuum separator 3 and the wax outlet 17, and is used to drive the wax liquid from the vacuum separator 3 into the wax outlet 17. The control system includes several control components and several detection components. The detection components are used to detect the amount of wax liquid in one of the filter devices and transmit the data to the corresponding control component. The control component controls the corresponding drive device to turn on or off. This application embodiment includes a control component and a detection component. By detecting the amount of wax remaining in the filtration device, the drive device is controlled to turn on or off, thereby achieving automated continuous processing of wax.

[0027] Specifically, the wax inlet 16 is equipped with a wax storage tank at the wax inlet end. The detection component includes a first detection component installed inside the wax storage tank. The first detection component is used to detect the amount of wax in the wax storage tank and send it to the first control component. The first control component is used to control the wax pump 4 to shut down.

[0028] Specifically, filter 9 includes a filter element and a buffer tank. The filter element is used to filter impurities in the wax liquid, and the buffer tank is used to buffer the wax liquid filtered by the filter element. The detection component includes a second detection component disposed in the buffer tank. The second detection component is used to detect the amount of wax liquid in the buffer tank and send it to a second control component. The second control component is used to control the circulation pump 7 to shut down.

[0029] Specifically, the vacuum separator 3 is equipped with a vacuum chamber, which includes an evaporation chamber and a wax chamber located below the evaporation chamber. The evaporation chamber is used to evaporate the moisture in the wax liquid, and the wax chamber is used to store the wax liquid processed by the evaporation chamber. The detection component includes a third detection component located in the wax chamber. The third detection component is used to detect the amount of wax liquid in the wax chamber and send it to the third control component. The third control component is used to control the wax pump 13 to start or stop.

[0030] Specifically, the drive device also includes a vacuum pump 11 connected to the vacuum chamber, which is used to extract air from the vacuum chamber; the second detection component sends the amount of wax in the buffer tank to the fourth control component, which is used to control the vacuum pump 11 to shut down.

[0031] Specifically, the inlet of the vacuum separator 3 is located at the top, and a primary and a secondary rinsing plate are arranged sequentially between the inlet and the vacuum chamber so that the wax liquid enters the vacuum chamber after passing through the primary and secondary rinsing plates in sequence.

[0032] Specifically, the wax liquid is transported in the wax liquid pipeline 5. The outer layer of the wax liquid pipeline 5 is provided with a heat-insulating pipeline 6. A heat-conducting oil is installed between the heat-insulating pipeline 6 and the wax liquid pipeline 5. The heat-insulating pipeline 6 is connected to the heat-conducting oil pump group 2 through the heat-conducting oil pipeline 14 to maintain the temperature of the wax liquid stable. A sampling port 8 is also provided on the wax liquid pipeline 5.

[0033] Specifically, the vacuum separator 3 is equipped with a heating component and a cooling component to control the operating temperature of the vacuum separator 3 by adjusting the heating component and the cooling component. The heating component includes a heater group 15, and the cooling component includes a cooling water tank 12 and a cooler 10.

[0034] This application provides a one-pass vacuum wax filter, a wax processing device. After dewaxing in the dewaxing kettle, the wax liquid is collected in a wax storage tank for initial settling. The wax pump 4 pressurizes the collected wax liquid and filters it through a PTFE filter bag in the filter 9. This step filters out impurities, ash, and other substances from the wax liquid. The process uses pressure filtration. The filtered wax liquid is then centrally buffered in a buffer tank. The wax liquid in the buffer tank is transported to a vacuum separator 3 via a constant temperature pipeline for moisture filtration. The wax liquid flows from top to bottom into the pre-installed primary filter plate in the vacuum separator 3. It then flows through the bottom and sides of the primary filter plate into the secondary filter plate. After being evenly distributed by the secondary filter plate, it flows evenly from top to bottom into the evaporation chamber to evaporate the moisture in the wax liquid. After evaporation in the evaporator, the wax liquid flows through the lower perforated plate of the evaporation chamber into the bottom wax chamber for buffering.

[0035] The vacuum separator 3 provided in this application embodiment mainly lowers the boiling point of water by reducing system pressure, thereby achieving the evaporation process. Furthermore, it improves evaporation efficiency by increasing the evaporation area or reducing the liquid surface pressure. The wax liquid flow effectively thins the wax liquid as it passes through the tray, plate, and tube from top to bottom. During evaporation, the liquid forms a thin film with a large surface area, resulting in rapid and uniform heat transfer and enabling continuous operation, thus increasing the evaporation rate. Internally, the vacuum separator 3 achieves a highly efficient and gentle evaporation process by reducing system pressure, utilizing the boiling point reduction effect and increased heat transfer temperature difference under reduced pressure, and increasing the evaporation area.

[0036] The automatic operation principle of this application embodiment is as follows: 1) A third detection component is preset in the wax chamber of the vacuum separator 3. The third detection component detects the liquid level in the wax chamber. When the amount of wax stored in the wax chamber reaches the preset upper limit, the third control component controls the wax pump 13 to start and deliver the wax liquid in the wax chamber to the wax outlet 17. When the amount of wax liquid in the wax chamber reaches the preset lower limit, the third control component and the third detection component are used to control the liquid level in the wax chamber within the preset range; 2) A first detection component is set in the wax storage tank at the wax inlet 16. When the first detection component detects that the amount of wax liquid in the wax storage tank is lower than the lower limit, the first control component controls the wax pump 4 to stop delivering wax liquid to the filter 9; 3) A second detection component is set in the buffer tank in the filter 9. When the second detection component detects that the amount of wax liquid in the buffer tank is lower than the lower limit, the second control component controls the circulation pump 7 to stop working, and the fourth control component controls the vacuum pump 11 to turn off after a delay of 5 minutes.

[0037] The one-pass vacuum wax filter provided in this application has the following advantages: 1) Low energy consumption: The wax liquid freshly dewaxed from the dewaxing kettle with a water content of about 14% can be directly fed into this wax filter for dehydration. Wax is continuously fed and discharged, and the water content of the dehydrated wax liquid can be precisely controlled between 0-10%, eliminating the need for intermittent waiting and effectively shortening the production line's waiting time. This wax filter can remove fine dust from the wax material that cannot be completely removed by the settling tank, as well as moisture and water-soluble substances generated by oxidation and carbonization that cannot be effectively removed by the dewatering tank. 1) Removes organic matter; 2) The wax is not easily deteriorated and has a high yield: This wax filter operates in a fully enclosed manner with a low processing temperature (90℃~110℃), avoiding the oxidation and deterioration of the wax and the pollution caused by fine dust falling into the air, thus extending the service life of the wax. The yield of slightly deteriorated wax is over 96%, and moderately deteriorated wax (original dehydration temperature 120℃) is over 95%; 3) Convenient operation and maintenance: The wax filter can be automatically completed after one-button start-up, without the need for personnel supervision; 4) Small equipment footprint: The filter 9 and vacuum separator 3 of this wax filter occupy a total area of ​​approximately 5m². 2 6) The treated wax has good quality: the water content and ash content of the treated wax are very low and controllable, and some of the aged wax and tiny solid particles that cannot be removed by existing processes can be separated.

[0038] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A once-through vacuum filter for wax, comprising a control system, a driving device and a filtering device, characterized in that: the filtering device comprises a filter (9) and a vacuum separator (3) arranged in sequence between a wax inlet (16) and a wax outlet (17), the filter (9) being used to filter impurities in the wax liquid, and the vacuum separator (3) being used to filter moisture in the wax liquid; the driving device comprises a wax inlet pump (4), a circulating pump (7) and a wax outlet pump (13), the wax inlet pump (4) being arranged between the wax inlet (16) and the filter (9) and used to drive the wax liquid from the wax inlet (16) into the filter (9), the circulating pump (7) being arranged between the filter (9) and the vacuum separator (3) and used to drive the wax liquid from the filter (9) into the vacuum separator (3), and the wax outlet pump (13) being arranged between the vacuum separator (3) and the wax outlet (17) and used to drive the wax liquid from the vacuum separator (3) into the wax outlet (17); the control system comprises a plurality of control components and a plurality of detection components, the detection components being used to detect the amount of wax liquid in one of the filtering devices and transmit the amount to the corresponding control component, and the control component being used to control the corresponding driving device to be turned on or off.

2. The single pass vacuum filter according to claim 1, characterized in that a wax storage cylinder is arranged at the wax inlet end of the wax inlet (16), the detection components comprise a first detection component arranged in the wax storage cylinder, the first detection component being used to detect the amount of wax liquid in the wax storage cylinder and transmit the amount to a first control component, and the first control component being used to control the wax inlet pump (4) to be turned off.

3. The single pass vacuum filter according to claim 1, wherein the filter (9) comprises a filter element and a buffer tank, the filter element being used to filter impurities in the wax liquid, and the buffer tank being used to buffer the wax liquid filtered by the filter element; the detection components comprise a second detection component arranged in the buffer tank, the second detection component being used to detect the amount of wax liquid in the buffer tank and transmit the amount to a second control component, and the second control component being used to control the circulating pump (7) to be turned off.

4. The single-pass vacuum filter according to claim 3, characterized in that the vacuum separator (3) is internally provided with a vacuum chamber, the vacuum chamber comprising an evaporation chamber and a wax chamber arranged below the evaporation chamber, the evaporation chamber being used to evaporate moisture in the wax liquid, and the wax chamber being used to store the wax liquid processed by the evaporation chamber; the detection components comprise a third detection component arranged in the wax chamber, the third detection component being used to detect the amount of wax liquid in the wax chamber and transmit the amount to a third control component, and the third control component being used to control the wax outlet pump (13) to be started or turned off.

5. The single-pass vacuum filter according to claim 4, characterized in that the driving device further comprises a vacuum pump (11) connected to the vacuum chamber, the vacuum pump (11) being used to extract air in the vacuum chamber; the second detection component transmits the amount of wax liquid in the buffer tank to a fourth control component, and the fourth control component is used to control the vacuum pump (11) to be turned off.

6. The single pass vacuum filter according to claim 4, wherein The inlet of the vacuum separator (3) is arranged at the top, and a first shower plate and a second shower plate are sequentially arranged between the inlet and the vacuum chamber, so that the wax liquid sequentially passes through the first shower plate and the second shower plate and then enters the vacuum chamber.

7. The single pass vacuum filter according to claim 1, wherein The wax liquid is transported in a wax liquid pipeline (5), and an outer layer of the wax liquid pipeline (5) is provided with a heat preservation pipeline (6), a heat conducting oil is arranged between the heat preservation pipeline (6) and the wax liquid pipeline (5), and the heat preservation pipeline (6) is connected with a heat conducting oil pump group (2) through a heat conducting oil pipeline (14), so as to keep the temperature of the wax liquid stable.

8. The single pass vacuum filter according to claim 1, wherein A heating assembly and a cooling assembly are arranged outside the vacuum separator (3), so as to control the working temperature of the vacuum separator (3) by adjusting the heating assembly and the cooling assembly.

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