Organic solvent recovery device for hydroxypropyl methyl cellulose production

Abstract

The utility model discloses an organic solvent recovery device for hydroxypropyl methyl cellulose production, which comprises a recovery box body for recovering an organic solvent, the top surface of the recovery box body is fixedly connected with a liquid inlet connecting pipe, and the interior of the recovery box body close to the top surface of the liquid inlet connecting pipe is fixedly connected with a flow guide component; a filtering assembly is installed on the side wall of the middle layer in the recycling box body, one side of the filtering assembly is slidably connected with a collecting assembly, a waste outlet is formed in the side wall of the recycling box body, and the interior of the waste outlet is slidably connected with the collecting assembly; the organic solvent is filtered while obliquely flowing downwards on the surface of the filter screen in the inclination direction of the fixing frame, the filtering area is increased, the filtering efficiency is improved, meanwhile, accumulated waste can be collected and treated through the collecting tank, meanwhile, the collecting assembly is installed in the collecting tank of the filtering assembly, and the filtering efficiency is improved. And the collected waste materials can be taken out from the interior of the recycling box body, so that the waste materials can be conveniently cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to an organic solvent recovery device used for the production of hydroxypropyl methylcellulose. Background Art

[0002] Hydroxypropyl methylcellulose (HPMC) is a water-soluble polymer commonly used in the preparation of various coatings, building materials, medicines and foods. The production of HPMC is usually carried out through the following steps:

[0003] Methylation: react the cellulose raw material with a methylating agent such as methyl iodide so that the hydroxyl groups on the cellulose are replaced by methyl groups to obtain methyl cellulose; hydroxypropylation: react methyl cellulose with a hydroxypropylating agent such as chloropropanol so that the hydroxyl groups on the methyl cellulose are replaced by hydroxypropyl groups to obtain hydroxypropyl methyl cellulose; refine and dry, package and store.

[0004] After searching, in the prior art, the announcement number is CN220788298U, which discloses a hydroxypropyl methylcellulose production wastewater recovery and treatment device, including a body, a sedimentation chamber is fixedly arranged on one side of the body, a feed pipe is fixedly arranged on the side of the body close to the sedimentation chamber, a stirring chamber is fixedly arranged on the side of the body away from the sedimentation chamber, and a power box is fixedly arranged on the top side of the stirring chamber. In this utility model, the feed pipe is connected with the filter pipe, and the wastewater enters the device from the feed pipe. The two filter flanges are fixed by six bolts. The filter nets in the two filter flanges filter the wastewater and leave the filtered residue inside the filter pipe, thereby achieving filtration. The filter device can be disassembled by the bolts on the filter flange. When the internal filtered residue needs to be cleaned during long-term use, the filtered residue can be easily and quickly processed, and the filter net can be cleaned to prevent the residue from clogging the filter net and affecting the feeding.

[0005] However, the device and the prior art still have the following defects:

[0006] In the process of producing hydroxypropyl methylcellulose, during the methylation and hydroxypropylation processes, the organic solvents of methyl iodide and propylene glycol undergo catalytic reactions in the methylation and hydroxypropylation reactions. Then, when the existing production equipment recycles the organic solvent, the organic solvent may carry some waste materials. These waste materials can be removed by filtering, thereby improving the purity and quality of the recovered solvent.

[0007] However, the existing devices for filtering organic solvents often only perform simple filtering through a filter screen, and the waste after filtration is not easy to clean. At the same time, there is also a lack of drainage treatment for the organic solvent, which results in the inability to evenly divert and filter the organic solvent. Utility Model Content

[0008] The utility model aims to provide an organic solvent recovery device for hydroxypropyl methylcellulose production, so as to solve the problems in the above background technology that the waste after filtration is difficult to clean up and the organic solvent is lacking in drainage.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] An organic solvent recovery device for the production of hydroxypropyl methylcellulose, comprising a recovery box for recovering the organic solvent, wherein a liquid inlet connecting pipe is fixedly connected to the top surface of the recovery box, a flow guide assembly is fixedly connected to the inside of the recovery box near the top surface of the liquid inlet connecting pipe, the flow guide assembly comprises a flow guide pipe and a flow guide bin, the top of the flow guide pipe is connected to the liquid inlet connecting pipe, the bottom end of the flow guide pipe is integrally formed with the top surface of the flow guide bin, and the inside is connected;

[0011] A filter assembly is installed on the inner middle side wall of the recovery box, and the filter assembly is arranged in a transversely inclined manner inside the recovery box;

[0012] The filter assembly is slidably connected to one side thereof with a collecting assembly, and the side wall of the recycling box is provided with a waste outlet, and the interior of the waste outlet is slidably connected to the collecting assembly:

[0013] A recovery component for discharging the filtered organic solvent is fixedly connected to the lower layer of the recovery box.

[0014] Preferably, the interior of the guide bin is integrally formed with a first partition and a second partition, the first partition is arranged along the edge of the inner cavity of the guide bin, and a first guide groove for the flow of organic solvent is formed between the guide bin and the first partition, a plurality of second partitions are provided, the top ends of the plurality of second partitions are fixedly connected to the bottom surface of the first partition, a plurality of second guide grooves are formed between the first partition and the plurality of second partitions, and the first partition located above the plurality of second guide grooves is provided with a guide hole.

[0015] Preferably, the top of the guide tube is in a circular ring structure and the bottom is in a flat mouth shape, and the guide chamber is in a trapezoidal structure.

[0016] Preferably, the filter assembly includes a fixed frame, a filter screen, a first mounting block, a collecting groove and a limit plate, the filter screen is installed inside the fixed frame, the first mounting blocks are respectively welded to the side walls on both sides of the fixed frame, the inner side walls of the recovery box are respectively welded with second mounting blocks, the first mounting blocks are fixedly installed to the second mounting blocks by screws, the fixed frame is arranged in a transversely inclined manner in the inner middle layer of the recovery box, and a collecting groove for collecting waste is provided on the surface of the lower side of the fixed frame, and one side of the collecting groove is fixedly connected to the limit plate.

[0017] Preferably, the collecting assembly includes a collecting bin, side panels and a pull rod, the collecting trough and the collecting bin are both semi-tubular, the side panels are respectively welded to the side walls on both sides of the collecting bin, the collecting bin is slidably connected in the collecting trough, one of the side walls of the side panels is fixedly connected to one end of the pull rod, and the pull rod passes through the waste outlet and extends to the outside of the recycling box.

[0018] Preferably, the recovery component includes a converging plate and a drainage groove, the converging plate is fixedly connected to the inner lower layer of the recovery box in a "V" shape, a drainage groove is provided at the bottom of the converging plate, and a liquid outlet hopper is installed on the side wall of the recovery box, one end of the liquid outlet hopper extends to the bottom of the drainage groove.

[0019] Preferably, the converging plate is arranged in a longitudinally inclined manner at the inner lower layer of the recovery box.

[0020] Preferably, a funnel is fixedly mounted on the top of the liquid inlet connecting pipe by screws.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. By setting an inclined filter assembly, the organic solvent can flow and filter on the surface of the filter screen along the inclined direction of the fixed frame, thereby increasing the filter area and improving the filter efficiency. At the same time, the accumulated waste can be collected and processed through the collection tank.

[0023] At the same time, by installing the collecting component in the collecting tank of the filtering component, the collected waste can be taken out from the inside of the recycling box, which is convenient for cleaning and processing the waste.

[0024] 2. By providing a guide component on the upper layer of the recovery box, the organic solvent flows to the filter component through the guide pipe and the guide bin. The setting of the guide pipe and the guide bin can not only adjust the flow rate of the organic solvent to prevent the problem of incomplete filtration due to excessive flow rate, but also uniformly guide the organic solvent to be filtered to prevent it from being concentrated on the filter component for aggregation filtration, thereby improving the filtration effect.

[0025] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the internal structure of the upper layer of the recycling box of the utility model;

[0028] Figure 3 This is a schematic cross-sectional structural diagram of the flow guide assembly of the utility model;

[0029] Figure 4 This is a schematic diagram of the middle structure of the recycling box of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the filter assembly and the collection assembly of the utility model;

[0031] Figure 6 It is a schematic diagram of the lower structure of the recycling box of the utility model.

[0032] In the figure:

[0033] 1. Recovery box; 2. Liquid inlet connecting pipe; 3. Funnel; 4. Waste outlet;

[0034] 5. Collection assembly; 51. Collection bin; 52. Side panel; 53. Pull rod;

[0035] 6. Liquid outlet;

[0036] 7. flow guide assembly; 71. flow guide pipe; 72. flow guide chamber; 73. first baffle; 74. first flow guide groove; 75. flow guide hole; 76. second baffle; 77. second flow guide groove;

[0037] 8. Filter assembly; 81. Fixing frame; 82. Filter screen; 83. First mounting block; 84. Collecting tank; 85. Limiting plate;

[0038] 9. Recovery component; 91. Converging plate; 92. Drainage trough;

[0039] 10. Second mounting block. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0041] See also Figures 1 to 6 , the utility model provides embodiments:

[0042] like Figure 1 As shown, an organic solvent recovery device for hydroxypropyl methylcellulose production includes a recovery box 1 for recovering the organic solvent, and a liquid inlet connecting pipe 2 is fixedly connected to the top surface of the recovery box 1.

[0043] Among them, the liquid inlet connecting pipe 2 can be directly installed with a container for collecting organic solvents through the connecting pipe, or a funnel 3 can be fixed on the top of the liquid inlet connecting pipe 2 by screws, and the organic solvent to be filtered and treated can be directly poured into it through the funnel 3 for filtering and treatment through the recovery box 1.

[0044] like Figures 2-3 As shown, a guide assembly 7 is fixedly connected to the top surface of the liquid inlet connecting pipe 2 inside the recovery box 1, and the guide assembly 7 includes a guide pipe 71 and a guide bin 72. The top of the guide pipe 71 is connected to the liquid inlet connecting pipe 2, and the bottom end of the guide pipe 71 is integrally formed with the top surface of the guide bin 72, and the insides are connected;

[0045] The interior of the guide bin 72 is integrally formed with a first partition 73 and a second partition 76. The first partition 73 is arranged along the edge of the inner cavity of the guide bin 72, and a first guide groove 74 for the flow of organic solvent is formed between the guide bin 72 and the first partition 73. A plurality of second partitions 76 are provided, and the top ends of the plurality of second partitions 76 are fixedly connected to the bottom surface of the first partition 73. A plurality of second guide grooves 77 are formed between the first partition 73 and the plurality of second partitions 76. The first partition 73 located above the plurality of second guide grooves 77 is provided with a guide hole 75.

[0046] The guide tube 71 has a circular ring structure at the top and a flat mouth at the bottom, and the guide chamber 72 has a trapezoidal structure, through which the organic solvent can be guided and processed to adjust the flow rate of the organic solvent to prevent incomplete filtration due to excessive flow rate.

[0047] In order to be able to uniformly guide the organic solvent to be filtered to prevent concentrated filtration on the filter component 8, the organic solvent enters the guide bin 72 through the guide pipe 71, flows to both sides along the first guide groove 74 on both sides of the first partition 73, and in the process of flowing, enters the second guide groove 77 through the guide hole 75, so that the organic solvent can be diverted to avoid concentration on the filter component 8.

[0048] like Figures 4-5 As shown, a filter assembly 8 is installed on the inner middle side wall of the recovery box 1, and the filter assembly 8 is arranged in a transversely inclined manner inside the recovery box 1;

[0049] like Figure 5As shown, the filter assembly 8 includes a fixed frame 81, a filter screen 82, a first mounting block 83, a collecting groove 84 and a limiting plate 85. The filter screen 82 is installed inside the fixed frame 81. The first mounting blocks 83 are respectively welded to the side walls on both sides of the fixed frame 81. The inner side walls of the recovery box 1 are respectively welded with second mounting blocks 10. The first mounting blocks 83 are fixedly installed on the second mounting blocks 10 by screws. The fixed frame 81 is arranged in a transversely inclined manner in the inner middle layer of the recovery box 1. A collecting groove 84 for collecting waste is provided on the surface of the lower side of the fixed frame 81, and a limiting plate 85 is fixedly connected to one side of the collecting groove 84.

[0050] In order to filter, collect and process the waste in the organic solvent, the fixed frame 81 is arranged in a horizontally inclined manner in the inner middle layer of the recovery box 1, so that the organic solvent flows and is filtered while diagonally downward along the inclined direction of the fixed frame 81 on the surface of the filter 82. In this process, the waste filtered by the filter 82 is accumulated and affected by gravity, and slides into the collection tank 84 to be collected, so that the filtered waste can be collected and processed.

[0051] In order to facilitate the removal of the waste in the collecting tank 84 from the interior of the recycling box 1, Figure 5 As shown, one side of the filter assembly 8 is slidably connected to the collection assembly 5, and the side wall of the recovery box 1 is provided with a waste outlet 4, and the interior of the waste outlet 4 is slidably connected to the collection assembly 5:

[0052] The collecting assembly 5 includes a collecting bin 51, a side panel 52 and a pull rod 53. The collecting trough 84 and the collecting bin 51 are both semi-tubular. The side panels 52 are respectively welded to the side walls on both sides of the collecting bin 51. The collecting bin 51 is slidably connected in the collecting trough 84. The side wall of one of the side panels 52 is fixedly connected to one end of the pull rod 53. The pull rod 53 passes through the waste outlet 4 and extends to the outside of the recycling box 1.

[0053] The waste entering the collecting trough 84 falls into the collecting bin 51. When the waste in the collecting bin 51 needs to be taken out from the inside of the recycling box 1, the pulling rod 53 is pulled to slide the collecting bin 51 in the collecting trough 84 and pulled out from the waste outlet 4. After the waste in the collecting bin 51 is cleaned, it is inserted into the collecting trough 84 again so that it can be reused.

[0054] like Figure 6 As shown, a recovery component 9 for discharging the filtered organic solvent is fixedly connected to the lower layer of the recovery box 1 .

[0055] The recovery assembly 9 includes a converging plate 91 and a drainage groove 92. The converging plate 91 is fixedly connected to the inner lower layer of the recovery box 1 in a "V" shape. The drainage groove 92 is provided at the bottom of the converging plate 91. The side wall of the recovery box 1 is provided with a liquid outlet hopper 6. One end of the liquid outlet hopper 6 extends to the bottom of the drainage groove 92. The converging plate 91 is arranged in a longitudinally inclined manner in the inner lower layer of the recovery box 1.

[0056] Since one side of the converging plate 91 is higher than the other side, the organic solvent filtered by the filter assembly 8 can be gathered into the drainage groove 92 along the converging plate 91, flow from the high side to the low side of the drainage groove 92, and finally discharged from the recovery box 1 through the liquid outlet hopper 6.

[0057] In this way, the organic solvent containing waste is subjected to waste filtration treatment, thereby providing convenience for subsequent distillation.

[0058] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An organic solvent recovery device for the production of hydroxypropyl methylcellulose, comprising a recovery box (1) for recovering the organic solvent, characterized in that: The top surface of the recovery box (1) is fixedly connected to a liquid inlet connecting pipe (2); the interior of the recovery box (1) is fixedly connected to a flow guide assembly (7) near the top surface of the liquid inlet connecting pipe (2); the flow guide assembly (7) comprises a flow guide pipe (71) and a flow guide bin (72); the top of the flow guide pipe (71) is in communication with the liquid inlet connecting pipe (2); the bottom end of the flow guide pipe (71) is integrally formed with the top surface of the flow guide bin (72), and the interiors are in communication; A filter assembly (8) is installed on the inner middle side wall of the recovery box (1), and the filter assembly (8) is arranged in a transversely inclined manner inside the recovery box (1); The filter assembly (8) is slidably connected to a collecting assembly (5) on one side, the side wall of the recovery box (1) is provided with a waste outlet (4), and the interior of the waste outlet (4) is slidably connected to the collecting assembly (5): A recovery component (9) for discharging the filtered organic solvent is fixedly connected to the lower layer of the recovery box (1).

2. The organic solvent recovery device for the production of hydroxypropyl methylcellulose according to claim 1, characterized in that: The interior of the guide chamber (72) is integrally formed with a first partition (73) and a second partition (76); the first partition (73) is arranged along the edge of the inner cavity of the guide chamber (72), and a first guide groove (74) for the flow of organic solvent is formed between the guide chamber (72) and the first partition (73); a plurality of second partitions (76) are provided, and the top ends of the plurality of second partitions (76) are fixedly connected to the bottom surface of the first partition (73); a plurality of second guide grooves (77) are formed between the first partition (73) and the plurality of second partitions (76); and a guide hole (75) is provided on the first partition (73) above the plurality of second guide grooves (77).

3. The organic solvent recovery device for the production of hydroxypropyl methylcellulose according to claim 2, characterized in that: The top of the flow guide pipe (71) is in a circular ring-shaped structure and the bottom is in a flat mouth-shaped structure, and the flow guide chamber (72) is in a trapezoidal body-shaped structure.

4. The organic solvent recovery device for the production of hydroxypropyl methylcellulose according to claim 1, characterized in that: The filter assembly (8) comprises a fixed frame (81), a filter screen (82), a first mounting block (83), a collecting groove (84) and a limiting plate (85); the filter screen (82) is mounted inside the fixed frame (81); the first mounting block (83) is respectively welded to the side walls on both sides of the fixed frame (81); the inner side walls of the recovery box (1) are respectively welded with second mounting blocks (10); the first mounting block (83) is fixedly mounted to the second mounting block (10) by screws; the fixed frame (81) is arranged in a transversely inclined manner in the middle layer inside the recovery box (1); a collecting groove (84) for collecting waste is provided on the surface located on the lower side of the fixed frame (81); one side of the collecting groove (84) is fixedly connected to the limiting plate (85).

5. The organic solvent recovery device for the production of hydroxypropyl methylcellulose according to claim 4, characterized in that: The collecting assembly (5) comprises a collecting bin (51), a side plate (52) and a pull rod (53); the collecting trough (84) and the collecting bin (51) are both semi-tubular; the side plates (52) are respectively welded to the side walls of the collecting bin (51); the collecting bin (51) is slidably connected in the collecting trough (84); one of the side walls of the side plates (52) is fixedly connected to one end of the pull rod (53); the pull rod (53) passes through the waste outlet (4) and extends to the outside of the recycling box (1).

6. The organic solvent recovery device for hydroxypropyl methylcellulose production according to claim 1, characterized in that: The recovery assembly (9) comprises a converging plate (91) and a drainage groove (92); the converging plate (91) is fixedly connected to the inner lower layer of the recovery box (1) in a "V" shape; the bottom of the converging plate (91) is provided with a drainage groove (92); the side wall of the recovery box (1) is provided with a liquid outlet hopper (6); one end of the liquid outlet hopper (6) extends to the bottom of the drainage groove (92).

7. The organic solvent recovery device for the production of hydroxypropyl methylcellulose according to claim 6, characterized in that: The converging plate (91) is arranged in a longitudinally inclined manner at the inner lower layer of the recovery box (1).

8. The organic solvent recovery device for hydroxypropyl methylcellulose production according to claim 1, characterized in that: A funnel (3) is fixedly mounted on the top end of the liquid inlet connecting pipe (2) via screws.

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