Polyol impurity removal filter press equipment

Abstract

The utility model discloses a polyol impurity removal filter press equipment, comprising a filter press box, two support components of a filter screen, a driving component, a shielding component and a cleaning component, wherein a liquid inlet pipe is connected to the top of the filter press box; the filter screen is arranged inside the filter press box; two support components are arranged oppositely below the filter screen; a support shaft is arranged at the center of the filter screen, and the driving component is connected to the support shaft; a partition is arranged below the filter screen, and the partition separates the filter press box into a first channel and a second channel, the shielding component is located obliquely above the first channel, and the shielding component is connected to the partition; the cleaning component is arranged above the filter screen; and a drain pipe is connected to the bottom of the second channel. Thus, the filter cake on the filter screen can be cleaned without removing the filter screen, and the filter cake and filtrate can be discharged from different channels, which is convenient to operate, improves the cleaning efficiency of the filter cake, and further improves the filter press efficiency of the polyol.

Description

Technical Field

[0001] The utility model relates to the technical field of polyol purification, in particular to a polyol impurity removal filter press device. Background Art

[0002] Polyols are alcohol compounds that contain two or more hydroxyl groups in their molecules. Generally, polyols are prepared by copolymerization of carbon dioxide and propylene oxide in the presence of a catalyst. In the process of synthesizing polyols, it is necessary to remove impurities such as excess catalysts in the product to ensure the purity of the polyols.

[0003] At present, the commonly used polyol purification method is to use filter press technology. This method pumps the synthesized polyol mother liquor into a filter press box or filter press tank, and uses a filter screen to intercept impurities such as catalysts in the polyol mother liquor, thereby achieving the purpose of solid-liquid separation.

[0004] However, as the filter screen continues to filter, impurities such as catalysts will form a thick layer of filter cake on the filter screen, which affects the filtration efficiency. In order to solve this problem, the filter cake needs to be removed regularly. At present, the commonly used removal method is to take the filter screen out of the filter press box or filter press tank, and then manually remove the filter cake. This removal method is cumbersome and inefficient, which affects the filter press efficiency of polyols. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, one purpose of the utility model is to propose a polyol impurity removal filter press equipment, which can remove the filter cake on the filter screen without removing the filter screen, and can also discharge the filter cake and filtrate from different channels. The operation is convenient, the filter cake removal efficiency is improved, and the polyol filter press efficiency is further improved.

[0007] To achieve the above-mentioned purpose, the first aspect of the utility model proposes a polyol impurity removal filter press equipment, including a filter press box, two support components of a filter screen, a drive component, a shielding component and a cleaning component, wherein the top of the filter press box is connected to a liquid inlet pipe; the filter screen is arranged inside the filter press box; two support components are arranged oppositely below the filter screen; a support shaft is provided at the center of the filter screen, and the drive component is connected to the support shaft; a partition is provided below the filter screen, and the partition divides the filter press box into a first channel and a second channel, the shielding component is located obliquely above the first channel, and the shielding component is connected to the partition; the cleaning component is arranged above the filter screen; and a drain pipe is provided at the bottom of the second channel.

[0008] The polyol impurity removal filter press equipment of the utility model can remove the filter cake on the filter screen without removing the filter screen, and can also discharge the filter cake and filtrate from different channels, which is convenient to operate, improves the filter cake removal efficiency, and further improves the polyol filter press efficiency.

[0009] In addition, the polyol impurity removal filter press equipment proposed in the application may also have the following additional technical features:

[0010] Specifically, the driving assembly includes a motor, a driving shaft and two gears, wherein the motor is installed on the outside of the filter press box; the driving shaft is rotatably connected to the filter press box; one end of the support shaft is rotatably connected to the inner wall of the filter press box, and the other end of the support shaft extends to the outside of the filter press box; the two gears are respectively arranged on the driving shaft and the support shaft, and the two gears are meshed and connected.

[0011] Specifically, the support assembly includes a rod sleeve, a screw rod and a support block, wherein the rod sleeve is rotatably arranged on the outside of the filter press box; the screw rod is threadedly connected to the rod sleeve; the inner wall of the filter press box is provided with a slide groove, the support block is arranged at the end of the screw rod, and the support block is slidably connected to the slide groove.

[0012] Specifically, the shielding assembly includes a connecting shaft, a shielding plate and a spring, wherein the two ends of the connecting shaft are respectively fixedly connected to the inner wall of the filter press box; the shielding plate is rotatably connected to the connecting shaft; and the two ends of the spring are respectively connected to the shielding plate and the partition.

[0013] Specifically, the cleaning assembly includes two ball screws, two ball sliders and a scraper plate, wherein grooves are opened on two opposite inner walls of the filter press box, and the two ball screws are rotatably set in the corresponding grooves; the two ball sliders are respectively mounted on the corresponding ball screws, and the ball sliders are slidably connected to the grooves; the scraper plate is connected to the ball sliders.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0016] Figure 1 This is a schematic structural diagram of a polyol impurity removal filter press device according to an embodiment of the utility model;

[0017] Figure 2A cross-sectional view of a polyol impurity removal filter press device according to an embodiment of the utility model;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure of area A in the middle;

[0019] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure of area B in the middle;

[0020] Figure 5 This is a cross-sectional view of a polyol impurity removal filter press device according to another embodiment of the utility model.

[0021] As shown in the figure: 1. filter press box; 2. filter screen; 3. support assembly; 4. drive assembly; 5. shielding assembly; 6. cleaning assembly; 7. liquid inlet pipe; 8. support shaft; 9. partition; 10. first channel; 11. second channel; 12. slide groove; 13. drain pipe; 16. groove; 17. receiving groove; 18. push rod; 30. rod sleeve; 31. screw; 32. support block; 40. motor; 41. drive shaft; 42. gear; 50. connecting shaft; 51. shielding plate; 52. spring; 60. ball screw; 61. ball slider; 62. scraper plate. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. On the contrary, the embodiments of the present invention include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0023] The polyol impurity removal filter press equipment according to the embodiment of the utility model will be described below in conjunction with the accompanying drawings.

[0024] like Figures 1 to 5 As shown, the polyol impurity removal filter press equipment of the embodiment of the utility model may include a filter press box 1, a filter screen 2, two support components 3, a drive component 4, a shielding component 5 and a cleaning component 6.

[0025] The top of the filter press box 1 is connected with a liquid inlet pipe 7 , the filter screen 2 is arranged inside the filter press box 1 , and two support assemblies 3 are arranged opposite to each other below the filter screen 2 .

[0026] It should be noted that the liquid inlet pipe 7 described in this embodiment can be connected to the liquid pump, through which the polyol mother liquor can be transported to the interior of the filter press box 1, and when the polyol mother liquor is subjected to filter pressure treatment, the filter screen 2 is in a horizontal state, and sealing strips (not shown in the figure) are provided on the four side walls of the filter screen 2, and a sealing groove ring is provided on the inner wall of the filter press box 1, and the sealing strip is placed in the sealing groove ring.

[0027] Furthermore, the support assembly 3 can support the filter screen 2 so that the filter screen 2 always maintains a horizontal state when working.

[0028] A support shaft 8 is provided at the center of the filter screen 2, and the driving component 4 is connected to the support shaft 8. A partition 9 is provided below the filter screen 2, and the partition 9 divides the filter press box 1 into a first channel 10 and a second channel 11. The shielding component 5 is located obliquely above the first channel 10, and the shielding component 5 is connected to the partition 9. The cleaning component 6 is arranged above the filter screen 2, and a drain pipe 13 is provided at the bottom of the second channel 11.

[0029] It should be noted that, see Appendix Figure 1 The filter press box 1 described in this embodiment is provided with a box door, which is arranged opposite to the first channel 10. The filter cake at the bottom of the first channel 10 can be removed by opening the box door.

[0030] Furthermore, when the filter screen 2 is in a horizontal state, the shielding assembly 5 can shield the entrance of the first channel 10 to prevent the polyol filtrate from entering the interior of the first channel 10. The filtrate is discharged from the drain pipe 13 through the second channel 12. A control valve is provided on the drain pipe 13 to facilitate its control.

[0031] When the filter press is completed, the filter screen 2 is driven to tilt and the inlet above the first channel 10 is opened to allow the filter cake to enter the first channel 10, thereby separating the filter cake and the filtrate.

[0032] In the embodiment of the present application, the cleaning component 6 can accelerate the cleaning speed and effect of the filter cake on the filter screen 2, thereby improving the subsequent filter pressing rate and effect.

[0033] In one embodiment of the present invention, Figure 1 As shown, the driving assembly 4 may include a motor 40, a driving shaft 41 and two gears 42, wherein the motor 40 is installed on the outside of the filter press box 1, the driving shaft 41 is rotatably connected to the filter press box 1, one end of the support shaft 8 is rotatably connected to the inner wall of the filter press box 1, and the other end of the support shaft 8 extends to the outside of the filter press box 1, and the two gears 42 are respectively arranged on the driving shaft 41 and the support shaft 8, and the two gears 42 are meshedly connected.

[0034] In the embodiment of the present application, the motor 40 can drive the driving shaft 41 to rotate, and through the cooperation of the two gears 42, drive the support shaft 8 to rotate a certain angle, thereby driving the filter screen 2 to tilt, so as to facilitate the removal of the filter cake on the filter screen 2.

[0035] Furthermore, if Figure 4 As shown, the support assembly 3 may include a rod sleeve 30, a screw rod 31 and a support block 32, wherein the rod sleeve 30 is rotatably arranged on the outside of the filter press box 1, the screw rod 31 is threadedly connected to the rod sleeve 30, the inner wall of the filter press box 1 is provided with a slide groove 12, the support block 32 is arranged at the end of the screw rod 31, and the support block 32 is slidably connected to the slide groove 12.

[0036] In an embodiment of the present application, the support block 32 is slidably connected to the slide groove 12. When the rod sleeve 30 is rotated, the screw rod 31 can move horizontally along the direction of its axis due to the restriction of the support block 32, thereby facilitating the adjustment of the support block 32. When the support block 32 is placed under the filter 2, the support block 32 can support the filter 2. When the support block 32 moves to the inside of the slide groove 12, the support block 32 will not interfere with the rotation of the filter 2.

[0037] In one embodiment of the present invention, Figure 2 As shown, the shielding assembly 5 includes a connecting shaft 50, a shielding plate 51 and a spring 52, wherein the two ends of the connecting shaft 50 are respectively fixedly connected to the inner wall of the filter press box 1, the shielding plate 51 is rotatably connected to the connecting shaft 50, and the two ends of the spring 52 are respectively connected to the shielding plate 51 and the partition 9.

[0038] It should be noted that when the spring 52 is in the natural state, see the attached Figure 2 The left side of the baffle plate 51 is higher and the right side is lower, and at this time the left side of the baffle plate 51 is placed in the receiving groove 17 opened on the side wall of the filter press box 1, thereby effectively preventing the filtrate from falling into the first channel 10.

[0039] Further, a push rod 18 is provided at the bottom left side of the filter screen 2, see the attached Figure 5 When the filter screen 2 rotates counterclockwise, the left side of the filter screen 2 and the push rod 18 rotate downward and push the baffle plate 51 to tilt to open the entrance of the first channel 10, and the filter cake on the filter screen 2 will fall into the interior of the first channel 10 along the tilted filter screen 2 and the baffle plate 51.

[0040] Furthermore, if Figure 3As shown, the cleaning component 6 may include two ball screws 60, two ball sliders 61 and a scraper plate 62, wherein grooves 16 are opened on two opposite inner walls of the filter press box 1, the two ball screws 60 are rotatably set in the corresponding grooves 16, the two ball sliders 61 are respectively sleeved on the corresponding ball screws 60, and the ball sliders 61 are slidably connected to the grooves 16, and the scraper plate 62 is connected to the ball sliders 61.

[0041] It should be noted that the ball screw 60 described in this embodiment is connected to an external driving mechanism, such as a motor, which can drive the ball screw 60 to move, thereby causing the ball slider 61 to move along the axial direction of the ball screw 60. When the filter screen 2 is tilted, the scraper plate 62 abuts against the upper surface of the filter screen 2, and the filter cake on the filter screen 2 is quickly scraped off by the scraper plate 62, thereby improving the filter cake removal effect.

[0042] Specifically, when the polyol mother liquor is filter-filtered, the filter screen 2 is in a horizontal state, and the valve on the drain pipe 13 is in a closed state. The relevant personnel pump the polyol mother liquor from the inlet pipe 7 into the interior of the filter press box 1. After being filtered by the filter screen 2, the catalyst and other impurities in the polyol mother liquor are retained on the filter screen 2 to form a filter cake. The polyol will pass through the filter screen 2 and enter the interior of the second channel 11 to form a filtrate. At the same time, the polyol that falls on the baffle plate 51 will also flow to the interior of the second channel 11 along the inclined baffle plate 51, and finally be discharged from the drain pipe 13.

[0043] When the filter cake needs to be removed, the relevant personnel stop the polyol filtration and control the motor 40 to start. Through the cooperation of the two gears 42, the connecting shaft 50 is driven to rotate a certain angle (30-50 degrees), and the filter screen 2 is driven to rotate until it abuts against the scraper plate 62. At this time, the push rod 18 can push the baffle plate 51 to rotate, and the spring 52 is compressed. At this time, the entrance of the first channel 10 is opened.

[0044] Then, relevant personnel control the rotation of the ball screw 60, and drive the scraper plate 62 to move through the cooperation of the ball slider 61 to scrape the filter cake on the filter screen 2 and drop it into the inside of the first channel 10, so that the filter cake on the filter screen 2 can be quickly cleaned without removing the filter screen 2, and the operation is convenient.

[0045] In summary, the polyol impurity removal filter press equipment of the embodiment of the utility model can remove the filter cake on the filter screen without removing the filter screen, and can also discharge the filter cake and filtrate from different channels. The operation is convenient, the filter cake removal efficiency is improved, and the polyol filter press efficiency is further improved.

[0046] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. A polyol impurity removal filter press equipment, characterized in that: It includes a filter press box, two filter support components, a drive component, a shielding component and a cleaning component, among which: The top of the filter press box is connected to a liquid inlet pipe; The filter screen is arranged inside the filter press box; The two support assemblies are arranged opposite to each other below the filter screen; A support shaft is provided at the center of the filter screen, and the drive assembly is connected to the support shaft; A partition is provided below the filter screen, the partition divides the filter press box into a first channel and a second channel, the shielding assembly is located obliquely above the first channel, and the shielding assembly is connected to the partition; The cleaning component is arranged above the filter screen; The bottom of the second channel is connected with a drain pipe.

2. The polyol impurity removal filter press equipment according to claim 1, characterized in that: The drive assembly includes a motor, a drive shaft and two gears, wherein: The motor is installed outside the filter press box; The drive shaft is rotatably connected to the filter press box; One end of the support shaft is rotatably connected to the inner wall of the filter press box, and the other end of the support shaft extends to the outside of the filter press box; The two gears are respectively arranged on the driving shaft and the supporting shaft, and the two gears are meshedly connected.

3. The polyol impurity removal filter press equipment according to claim 1, characterized in that: The support assembly includes a rod sleeve, a screw rod and a support block, wherein: The rod sleeve is rotatably arranged outside the filter press box; The screw rod is threadedly connected to the rod sleeve; The inner wall of the filter press box is provided with a slide groove, the support block is arranged at the end of the screw rod, and the support block is slidably connected with the slide groove.

4. The polyol impurity removal filter press equipment according to claim 1, characterized in that: The shielding assembly includes a connecting shaft, a shielding plate and a spring, wherein: The two ends of the connecting shaft are respectively fixedly connected to the inner wall of the filter press box; The shielding plate is rotatably connected to the connecting shaft; The two ends of the spring are respectively connected to the shielding plate and the partition plate.

5. The polyol impurity removal filter press equipment according to claim 1, characterized in that: The cleaning assembly includes two ball screws, two ball sliders and a scraper plate, wherein: Grooves are provided on two opposite inner walls of the filter press box, and the two ball screws are rotatably disposed in the corresponding grooves respectively; The two ball sliders are respectively sleeved on the corresponding ball screws, and the ball sliders are slidably connected to the grooves; The scraper plate is connected to the ball slider.

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