CN223901427U - An N-methylpyrrolidone purification filter - Google Patents

Abstract

This utility model belongs to the field of chemical equipment technology and discloses an N-methylpyrrolidone purification filter, including a filter box with an inlet at the top and an outlet at the bottom. A primary filter screen is installed inside the filter box, and a sediment filter screen that cooperates with the primary filter screen is also installed inside the filter box. The sediment filter screen has a grooved structure. A scraper perpendicular to the primary filter screen is installed on the primary filter screen, and a sliding rod is connected to the scraper, with the sliding rod perpendicular to the scraper. A drive mechanism is connected to the sliding rod. This utility model can automatically clean the filter screen, and the filter screen can be cleaned according to the discharge volume of the filtrate.

Description

N-methyl pyrrolidone purifying filter

Technical Field

The utility model belongs to the technical field of chemical equipment, and particularly relates to an N-methylpyrrolidone purification filter.

Background

When N-methylpyrrolidone (NMP) is used in the fields of electronic insulating materials and lithium ion batteries, industrial N-methylpyrrolidone is required to be purified to remove residual particles (solid catalyst residues), organic amine and metal ions in the industrial N-methylpyrrolidone. It is therefore generally necessary to carry out a multistage treatment of technical grade N-methylpyrrolidone in succession with dehydration, particle removal, removal of organic impurities and cation exchange resins. In order to reduce the influence of the residue of the particulate matter on the subsequent molecular sieve adsorption column and the cation exchange resin, the filtration process needs to be optimized as much as possible, and the filtration efficiency needs to be improved.

Disclosure of utility model

The utility model aims to provide an N-methylpyrrolidone purification filter capable of automatically cleaning a filter screen.

Based on the above purpose, the utility model adopts the following technical scheme:

The N-methyl pyrrolidone purification filter comprises a filter box, wherein a liquid inlet is formed in the top end of the filter box, a liquid outlet is formed in the bottom end of the filter box, a primary filter screen is arranged in the filter box, a sediment filter screen matched with the primary filter screen is further arranged in the filter box, the sediment filter screen is of a groove structure, a scraper vertical to the primary filter screen is arranged on the primary filter screen, a sliding rod is connected with the scraper, the sliding rod is vertical to the scraper, and a driving mechanism is connected with the sliding rod.

Further, the driving mechanism comprises a rack fixedly connected with the sliding rod, a gear is connected with the rack in a meshed mode, a rotating column coaxial with the gear is fixedly connected with the gear, the rotating column is of a cylindrical structure, a spiral driving groove is formed in the peripheral surface of the rotating column and coaxial with the rotating column, a driving block is connected with the driving groove in a sliding mode, and a lifting structure is connected with the driving block.

Further, the lifting structure comprises a rotating rod arranged above the driving block, the rotating rod is rotationally connected with the filtering box, one end of the rotating rod is connected with the driving block, the other end of the rotating rod is connected with a contact plate, and an intermittent solvent flushing assembly is arranged above the contact plate.

Further, the lifting structure further comprises a balancing weight fixedly connected with the driving block, the balancing weight is connected with a sliding groove in a sliding mode, the sliding groove is vertically arranged, the sliding groove is fixedly connected with the filter box, and a soft rope is connected between the balancing weight and the rotating rod.

Further, the intermittent solvent flushing assembly comprises a filtrate storage tank arranged above the contact plate, the filtrate storage tank is rotationally connected with the filter tank through a rotating shaft, the rotating shaft divides the filtrate storage tank into a storage section and a water draining section, the water draining section is lighter than the storage section and larger than the storage section, and the water draining section is matched with the contact plate.

Further, a buffer tank is connected to the liquid inlet of the filter tank, a stop valve is arranged between the buffer tank and the liquid inlet, a slag outlet is formed in the filter tank and is arranged on one side of the sediment filter screen, and a sealing cover plate is connected to the slag outlet.

Compared with the prior art, the utility model has the following beneficial effects:

1. The scraper can scrape sundries on the primary filter screen under the drive of the driving mechanism, so that the primary filter screen can stably filter mixed solution, the scraper is matched with the sediment filter screen, the sundries can be pushed into the sediment filter screen, the sediment filter screen is arranged into a groove structure, so that the sundries can be deposited in the sediment filter screen, the blockage of the primary filter screen is avoided, and the filtering efficiency is improved.

2. The intermittent solvent flushing assembly can spray solution onto the contact plate to drive the rotating rod to rotate, the rotating rod drives the balancing weight and the sliding block to rise, the rotating column and the gear are finally driven to rotate, the rack, the sliding rod and the scraping plate move to scrape sundries, and when filtrate is stored in the filtrate storage tank by a certain amount, the intermittent solvent flushing assembly can release the filtrate and further drive the scraping plate to move, so that the application can automatically control the scraping plate to clean the filter screen according to the discharge amount of the filtrate and automatically stop working when the filtrate is not discharged.

3. The slag outlet is matched with the stop valve, the stop valve can be closed, sundries on the sediment filter screen can be conveniently taken out from the slag outlet, the cleaning efficiency is improved, the slag outlet can be sealed by the sealing cover plate, filtrate is prevented from flowing out, and the filtering process is more stable.

Drawings

FIG. 1 is a schematic diagram of embodiment 1 of the present utility model;

FIG. 2 is a partial enlarged view of embodiment 1 of the present utility model;

FIG. 3 is a schematic diagram showing the connection between the contact plate and the rotating rod according to embodiment 1 of the present utility model;

Fig. 4 is a schematic diagram of a filter box according to embodiment 2 of the present utility model.

In the figure, a filter box 1, a liquid inlet 2, a liquid outlet 3, a primary filter screen 4, a sediment filter screen 5, a scraping plate 6, a sliding rod 7, a positioning groove 8, a rack 9, a gear 10, a rotating column 11, a driving groove 12, a balancing weight 13, a sliding groove 14, a soft rope 15, a rotating rod 16, a driving block 17, a storage section 18, a water draining section 19, a contact plate 20, a buffer box 21, a liquid inlet pipe 22, a stop valve 23, a sealing cover plate 24 and an observation hole 25.

Detailed Description

Example 1

The N-methylpyrrolidone purification filter comprises a vertically arranged filter box 1, wherein a liquid inlet 2 is formed in the top end of the filter box 1, a liquid outlet 3 is formed in the bottom end of the filter box 1, a horizontal primary filter screen 4 is arranged in the filter box 1, a sediment filter screen 5 matched with the primary filter screen 4 is further arranged in the filter box 1, the sediment filter screen 5 is of a groove structure, the sediment filter screen 5 is arranged below the primary filter screen 4, the upper edge of the right side of the sediment filter screen 5 is tightly attached to the primary filter screen 4, and a supporting rod for placing the sediment filter screen 5 is arranged in the filter box 1. The primary filter screen 4 is provided with a scraper 6, the scraper 6 is vertically arranged and is vertical to the primary filter screen 4, the length direction of the scraper 6 is horizontal and vertical, the scraper 6 is fixedly connected with a slide bar 7 which is horizontally and transversely arranged, one end of the slide bar 7 is positioned in the middle of the primary filter screen 4, the other end of the slide bar 7 is positioned at one end of the primary filter screen 4 far away from the sediment filter screen 5, both ends of the slide bar 7 are connected with the scraper 6, the slide bar 7 is slidably connected with a positioning groove 8, the positioning groove 8 is parallel to the slide bar 7 and is fixedly connected with the filter box 1, and the slide bar 7 is connected with a driving mechanism.

As shown in fig. 1-2, the driving mechanism comprises a rack 9 fixedly connected with the slide bar 7, the rack 9 is parallel to the slide bar 7, the rack 9 is connected with a gear 10 in a meshed manner, and the gear 10 is arranged at the middle position of the primary filter screen 4 along the transverse direction. The axis of the gear 10 is vertically arranged, a rotating column 11 coaxial with the gear 10 is fixedly connected to the top of the gear 10, the rotating column 11 is of a cylindrical structure, the rotating column 11 is rotationally connected with the filter box 1 through a bearing, the rotating column 11 is rotationally arranged around the axis of the rotating column 11, a spiral driving groove 12 is formed in the peripheral surface of the rotating column 11, the driving groove 12 is coaxial with the rotating column 11, a driving block 17 is slidably connected in the driving groove 12, and the driving block 17 is connected with a lifting structure.

As shown in fig. 1-3, the lifting structure comprises a balancing weight 13 fixedly connected with a driving block 17, the balancing weight 13 is slidably connected with a sliding groove 14, the sliding groove 14 is vertically arranged, the sliding groove 14 is fixedly connected with the filter box 1, a soft rope 15 is connected between the balancing weight 13 and a rotating rod 16, the lifting structure further comprises the rotating rod 16 arranged above the driving block 17, the rotating rod 16 is rotationally connected with the filter box 1, the rotating axis of the rotating rod 16 is vertical to the sliding rod 7 and is horizontally and longitudinally arranged, one end of the rotating rod 16 is connected with the soft rope 15, the other end of the rotating rod is connected with a contact plate 20, and an intermittent solvent flushing assembly is arranged above the contact plate 20.

As shown in fig. 1, the intermittent solvent flushing assembly includes a filtrate tank disposed above the contact plate 20, the filtrate tank having a tubular structure with one end open and the other end closed, the opening of the filtrate tank being inclined so that the opening is upward when there is no water in the filtrate tank. The filtrate storage tank is rotatably connected with the filter tank 1 through a rotating shaft which is horizontally and longitudinally arranged, the rotating shaft divides the filtrate storage tank into a storage section 18 and a water discharge section 19, the water discharge section 19 is lighter than the storage section 18, the water discharge section 19 is larger than the storage section 18 in volume, an opening of the filtrate storage tank is arranged in the water discharge section 19, the water discharge section 19 is matched with the contact plate 20, and the opening of the filtrate storage tank is positioned right above the contact plate 20. The liquid inlet 2 of the filter box 1 is connected with a buffer box 21, a liquid inlet pipe 22 is arranged between the buffer box 21 and the liquid inlet 2, a stop valve 23 is arranged on the liquid inlet pipe 22, a slag outlet is arranged on the filter box 1, the slag outlet is arranged on one side of the sediment filter screen 5 and the cross section of the slag outlet is larger than that of the sediment filter screen 5, the sediment filter screen 5 is conveniently taken out, and the slag outlet is connected with a sealing cover 24 plate.

When the filtrate is filtered, the filtrate flows into the filtrate storage tank from the liquid inlet 2, and when the filtrate in the filtrate storage tank reaches a set amount, the weight of the water discharging section 19 is larger than that of the storage section 18, and at the moment, the water discharging section 19 of the filtrate storage tank rotates downwards, and the filtrate flows out from the opening of the filtrate storage tank and falls onto the contact plate 20. The contact plate 20 rotates downwards under the impact of a large amount of filtrate to enable the rotating rod 16 to rotate upwards, the rotating rod 16 drives the balancing weight 13 and the sliding block to ascend through the soft rope 15, the sliding block drives the driving groove 12 to rotate after ascending and drives the rotating column 11 and the gear 10 to rotate, the gear 10 drives the sliding rod 7 to slide in the positioning groove 8 through the rack 9, the sliding rod 7 drives the scraping plate 6 to move to scrape sundries, and only after a certain amount of filtrate is stored in the filtrate storage tank, the intermittent solvent flushing assembly can release the filtrate to drive the scraping plate 6 to move, and the scraping plate 6 scrapes solid particles on the primary filter screen 4 and pushes the solid particles into the sediment filter screen 5. When the sediment filter screen 5 is cleaned, the stop valve 23 is closed, the sealing cover 24 plate is opened, and sediment on the sediment filter screen 5 is conveniently taken out from the slag outlet.

Example 2

The other parts of this embodiment are the same as those of embodiment 1, except that, as shown in fig. 4, the filter box 1 is provided with an observation hole 25, the observation hole 25 is arranged above the sealing cover 24 plate, transparent glass is arranged in the observation hole 25, and the sediment accumulation condition in the sediment filter screen 5 can be seen from the observation hole 25, so as to determine whether the sediment filter screen 5 should be cleaned. The primary filter screen 4 is obliquely arranged, one end of the primary filter screen 4, which is far away from the sediment filter screen 5, is higher than one end of the sediment filter screen 5, which is contacted with the sediment filter screen 5, so that sediment can conveniently enter the sediment filter screen 5, a vertical automatic telescopic rod is arranged between the scraping plate 6 and the sliding rod 7 to ensure that the scraping plate 6 is contacted with the primary filter screen 4, the automatic telescopic rod comprises a fixed barrel fixedly connected with the sliding rod 7, the top end of the fixed barrel is closed, the bottom end of the fixed barrel is opened, a telescopic barrel is slidably connected in the fixed barrel, the bottom end of the telescopic barrel is closed, the top end of the fixed barrel is opened, a spring is arranged in the fixed barrel and the telescopic barrel, one end of the spring is connected with the bottom end of the telescopic barrel, and the other end of the spring is connected with the top end of the fixed barrel.

Claims (6)

1. The N-methylpyrrolidone purification filter comprises a filter box, wherein a liquid inlet is formed in the top end of the filter box, a liquid outlet is formed in the bottom end of the filter box, and a primary filter screen is arranged in the filter box.

2. The N-methylpyrrolidone purification filter according to claim 1, wherein the driving mechanism comprises a rack fixedly connected with a sliding rod, a gear is connected with the rack in a meshed manner, a rotating column coaxial with the gear is fixedly connected with the gear, a spiral driving groove is formed in the peripheral surface of the rotating column and coaxial with the rotating column, and a driving block is connected with the driving groove in a sliding manner and is connected with a lifting structure.

3. The N-methylpyrrolidone purification filter according to claim 2, wherein the lifting structure comprises a rotating rod arranged above the driving block, the rotating rod is rotatably connected with the filter box, one end of the rotating rod is connected with the driving block, the other end of the rotating rod is connected with a contact plate, and an intermittent solvent flushing assembly is arranged above the contact plate.

4. The N-methylpyrrolidone purification filter according to claim 3, wherein the lifting structure further comprises a balancing weight fixedly connected with the driving block, the balancing weight is slidably connected with a sliding groove, the sliding groove is vertically arranged, the sliding groove is fixedly connected with the filter box, and a soft rope is connected between the balancing weight and the rotating rod.

5. The N-methylpyrrolidone purification filter of claim 4, wherein the intermittent solvent flushing assembly comprises a filtrate tank disposed above the contact plate, the filtrate tank being rotatably connected to the filtration tank by a rotating shaft, the rotating shaft dividing the filtrate tank into a storage section and a drain section, the drain section being lighter than the storage section, the drain section being mated with the contact plate.

6. The N-methylpyrrolidone purification filter according to claim 5, wherein the liquid inlet of the filter box is connected with a buffer box, a stop valve is arranged between the buffer box and the liquid inlet, a slag outlet is arranged on the filter box and is arranged on one side of a sediment filter screen, and a sealing cover plate is connected to the slag outlet.