A device for preliminary filtering and separating crude p-nitrophenol

Abstract

The utility model discloses a kind of p-nitrophenol crude product preliminary filtration separation devices, specifically related to filtration separation technical field, including support ring, the support ring is provided with filter assembly, the filter assembly includes the filter core rib that is arranged in the middle part of support ring.The utility model is connected by connecting block through the electric push rod of the slide bar of filter core rib side and support ring outside, electric push rod can drive slide bar drive helical filter reciprocating motion along axial direction.This shaking action can make solid impurities attached to the outside of filter loose and fall off, avoid the plugging problem caused by impurity accumulation in traditional filter device, ensure that device continuous stable operation, and the filter core is equipped in the several shunt of the bottom of receiving cover, can carry out secondary filtration to liquid after filter filter.The design can further remove the small impurities that helical filter has not intercepted, make the filtrate purity after preliminary filtration higher, reduce the interference of subsequent purification step.

Description

Technical Field

[0001] This utility model relates to the field of filtration and separation technology, and more specifically, to a preliminary filtration and separation device for crude p-nitrophenol. Background Technology

[0002] Nitrophenol is a class of aromatic compounds containing a nitro group (-NO2) and a phenolic hydroxyl group (-OH). Its structure consists of a hydroxyl group and a nitro group attached to a benzene ring. Due to the different relative positions of the nitro group and the hydroxyl group, it can be divided into three isomers: ortho-nitrophenol, m-nitrophenol, and p-nitrophenol.

[0003] The nitration reaction may generate unreacted raw materials (such as phenol), byproducts (such as dinitrophenol), or tar-like substances due to improper control of reaction conditions. These impurities may exist in the form of solid particles. Crude p-nitrophenol (whether solid or filtrate) can be further purified by recrystallization, distillation, and other methods. If a large amount of solid impurities are not removed by filtration first, subsequent steps may be interfered with (such as reduced crystallization purity, blockage during distillation, etc.), affecting the quality and yield of the final product. Therefore, a preliminary filtration and separation device for crude p-nitrophenol is provided. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a preliminary filtration and separation device for crude p-nitrophenol, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a preliminary filtration and separation device for crude p-nitrophenol, comprising a support ring, on which a filter assembly is provided; The filter assembly includes filter element ribs disposed in the middle of the support ring, and a spiral filter is disposed at the bottom of the filter element ribs. The filter extends downward in a spiral shape while maintaining a specified spacing in the axial direction of the filter element ribs, and a discharge chamber is formed on the inner side of the filter. A sliding rod is provided on one side of the filter element ribs, and a positioning limit rod is provided on the outside of the filter.

[0006] Optionally, in one possible implementation, a receiving cover is provided at the bottom of the support ring, the filter is located inside the receiving cover, and the vertical cross-sectional shape of the receiving cover is set to a frustum shape. The sliding rod passes through the receiving cover and extends to the outside of the receiving cover, and the sliding rod is slidably connected to the receiving cover. An electric push rod is provided on the outside of the support ring, and a connecting block is provided at one end of the sliding rod. The connecting block and the electric push rod are on the same axial direction, and the output end of the electric push rod extends to the connecting block and is detachably connected to the connecting block. Several diversion ports are opened at the bottom of the inner wall of the receiving cover, and a filter element is provided in each of the diversion ports. The technical effects and advantages of this utility model are as follows: By employing a spiral filter design, the filter extends downwards along the filter element ribs at a specified interval, significantly increasing the contact area with crude p-nitrophenol. Simultaneously, the gradient space created by the spiral structure can progressively intercept solid impurities of different particle sizes, reducing the load on a single filter surface and significantly improving filtration efficiency. The sliding rod on one side of the filter element ribs is connected to the electric push rod on the outside of the support ring via a connecting block. The electric push rod can drive the sliding rod to make the spiral filter reciprocate along the axial direction. This shaking action can loosen and remove solid impurities attached to the outside of the filter, avoiding the clogging problem caused by impurity accumulation in traditional filtration devices, and ensuring continuous and stable operation of the device. Furthermore, several outlets at the bottom of the receiving hood are equipped with filter elements, allowing for secondary filtration of the liquid after initial filtration. This design further removes fine impurities that the spiral filter failed to intercept, resulting in higher purity of the filtrate after preliminary filtration and reducing interference from subsequent purification steps. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0008] Figure 1 This is a front view of the overall structure of this utility model.

[0009] Figure 2 This is a schematic diagram of the filter element ribs, limiting rod, sliding rod, and connecting block of this utility model.

[0010] Figure 3 This is a schematic diagram of the support ring, receiving cover, and electric push rod of this utility model.

[0011] Figure 4 This utility model Figure 2 Side view.

[0012] The attached diagram is labeled as follows: 1. Support ring; 2. Filter element ribs; 3. Discharge chamber; 4. Slide rod; 5. Limiting rod; 6. Connecting block; 7. Electric push rod; 8. Receiver cover; 9. Diverter port. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] This embodiment discloses a preliminary filtration and separation device for crude p-nitrophenol, which aims to solve the problems of incomplete impurity removal, low filtration efficiency, and inconvenient operation when filtering crude p-nitrophenol in the prior art.

[0015] As attached Figure 1 As shown, the device includes a support ring 1, a filter assembly, a receiving cover 8, a drive mechanism, and a flow-diverting filter structure. The specific configuration of each component is as follows: Support ring 1: Its bottom is fixedly connected to the receiving cover 8 by bolts, and is used to support the filter assembly and drive mechanism.

[0016] Filter components: as attached Figure 2 As shown, it includes filter element ribs 2, spiral filter and limiting rod 5.

[0017] The filter element ribs 2 are located in the middle of the support ring 1, serving as the support skeleton of the filter; A spiral filter is wound around the outside of the filter element ribs 2. The spiral diameter gradually decreases from the top to the bottom, and the spiral extends downward at a specified distance in the axial direction of the filter element ribs 2, forming a discharge chamber 3 for collecting the filtrate after preliminary filtration. Limiting rods 5 are distributed on the outside of the filter. One end is welded to the bottom of the support ring 1, and the other end extends to the bottom of the filter. They are used to limit the spiral shape of the filter and prevent it from deforming due to pressure during filtration.

[0018] Attached cover 8: Figure 3 As shown, the vertical cross-section is truncated cone-shaped, and its inner wall is polished to receive residual filtrate on the outside of the filter and guide the liquid flow to the diversion port 9.

[0019] Drive mechanism: includes slide bar 4, connecting block 6 and electric push rod 7.

[0020] One end of the slide rod 4 is vertically welded to the filter element rib 2, and the other end passes through the receiving cover 8 and extends to the outside, forming a sliding fit with the receiving cover 8; Connecting block 6 is welded to the outer end of slide rod 4; The electric push rod 7, model DTZ300, is fixed on the bracket outside the support ring 1. The electric push rod 7 and the connecting block 6 are in the same axis. The output end is detachably connected to the connecting block 6 by bolts. It is used to drive the slide rod 4 to move the filter assembly back and forth along the axis, so as to realize the function of shaking the spiral filter.

[0021] As attached Figure 3 As shown, the bottom of the inner wall of the receiving cover 8 has several evenly distributed diversion ports 9. Each diversion port 9 can be fitted with a PP cotton filter element with a different pore size for secondary filtration of the liquid in the receiving cover 8.

[0022] The specific working principle is as follows: the crude p-nitrophenol product to be processed, whether a liquid or solid-liquid mixture containing solid impurities, is conveyed to the middle of the support ring 1 and comes into direct contact with the spiral filter on the filter element ribs 2. Under the action of gravity, the liquid component in the crude product is discharged through the discharge chamber 3 of the filter, while solid impurities, such as particulate raw materials and by-products, are intercepted on the outside of the filter.

[0023] The electric push rod 7 on the outside of the support ring 1 is activated. Its output end drives the slide rod 4 to perform axial reciprocating motion through the connecting block 6. The slide rod 4 slides in conjunction with the receiving cover 8 to ensure motion stability. The slide rod 4 simultaneously drives the filter element ribs 2 and the spiral filter to shake, causing solid impurities attached to the outside of the filter to detach from the surface due to inertia, preventing the discharge chamber 3 from being blocked. At the same time, the limiting rod 5 on the outside of the filter can limit the deformation of the spiral structure during shaking, ensuring filtration accuracy.

[0024] Impurities that do not pass through the discharge chamber 3 are collected in the filter, and the discharged medium is collected by the frustum-shaped receiving cover 8 at the bottom of the support ring 1. Due to the guiding nature of the frustum structure of the receiving cover 8, the liquid can converge along the inner wall to the bottom diversion port 9; the filter element in the diversion port 9 performs secondary filtration on this part of the liquid to further remove micron-sized fine impurities, such as tar-like particles, and improve the purity of the filtrate.

[0025] After initial filtration by the spiral filter, the filtrate is finally combined with the filtrate filtered a second time through the splitter port 9 to obtain p-nitrophenol filtrate with a large amount of solid impurities initially removed. It can be directly used for subsequent purification steps such as recrystallization and distillation, effectively avoiding interference from impurities in subsequent processes.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A preliminary filtration and separation device for crude p-nitrophenol, comprising a support ring (1), characterized in that: A filter assembly is provided on the support ring (1); The filter assembly includes a filter element rib (2) disposed in the middle of the support ring (1). A spiral filter is disposed at the bottom of the filter element rib (2). The filter extends downward in a spiral shape while maintaining a specified spacing in the axial direction of the filter element rib (2). A discharge chamber (3) is formed on the inner side of the filter. A slide bar (4) is provided on one side of the filter element rib (2), and a positioning limit bar (5) is provided on the outside of the filter.

2. The preliminary filtration and separation device for crude p-nitrophenol according to claim 1, characterized in that: The bottom of the support ring (1) is provided with a receiving cover (8), the filter is located inside the receiving cover (8), and the vertical cross-sectional shape of the receiving cover (8) is set as a frustum.

3. The preliminary filtration and separation device for crude p-nitrophenol according to claim 2, characterized in that: The slide rod (4) passes through the receiving cover (8) and extends to the outside of the receiving cover (8), and the slide rod (4) is slidably connected to the receiving cover (8).

4. The preliminary filtration and separation device for crude p-nitrophenol according to claim 3, characterized in that: An electric push rod (7) is provided on the outer side of the support ring (1), and a connecting block (6) is provided at one end of the slide rod (4).

5. The preliminary filtration and separation device for crude p-nitrophenol according to claim 4, characterized in that: The connecting block (6) and the electric push rod (7) are on the same axial direction, and the output end of the electric push rod (7) extends to the connecting block (6) and is detachably connected to the connecting block (6).

6. The preliminary filtration and separation device for crude p-nitrophenol according to claim 3, characterized in that: The bottom of the inner wall of the receiving cover (8) is provided with several diversion ports (9), and each diversion port (9) is provided with a filter element.

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