A continuous post-processing system for chemical products

Abstract

The present invention relates to the technical field of compound production, and in particular to a continuous post-processing system for chemical products. The system comprises: an intermediate tank connected to a production line for storing compounds containing impurities; a filter connected to the intermediate tank for filtering the compounds containing impurities to obtain impurities and compounds; and a finished product tank connected to the filter for storing the compounds after impurities have been removed. By arranging an intermediate tank and a filter in front of the finished product tank, the intermediate tank temporarily stores the compounds containing impurities, and the filter is connected to the intermediate tank, so that the compounds containing impurities can be continuously and closedly filtered, so that when the compounds are stored in the finished product tank, the impurities have been filtered out, thereby increasing the storage space of the compounds in the finished product tank, improving the filtering efficiency, reducing pollution, and preventing the impurities from being stored in the compounds for a long time and absorbing more compounds, resulting in a low yield of the compounds obtained after filtration.

Description

Technical Field

[0001] The present invention relates to the technical field of compound production, in particular to a continuous post-processing system for chemical products. Background Art

[0002] Polymer polyol is a polyol containing organic fillers that can replace inorganic fillers. When used in the synthesis of polyurethane foams, elastomers, adhesives and coatings, it can significantly improve the physical properties of the products and is therefore popular in the market.

[0003] Solid impurities and large polymer particles are generated during the production process of polymer polyols. Therefore, in order to obtain qualified polymer polyols, it is necessary to filter and remove the impurities in the polymer polyols.

[0004] In existing processes, a vibrating screen is usually used to filter impurities. In order to save equipment costs, the vibrating screen is usually installed on the packaging line, so that multiple materials can share a set of impurity removal and packaging equipment.

[0005] At this time, the polymer polyol with impurities output from the production line is usually directly input into the finished product tank for storage. When the qualified polymer polyol needs to be packaged, the polymer polyol with impurities is transported to the vibrating screen for filtration, impurity removal and packaging.

[0006] However, this process requires personnel to operate on site all the time, and the vibrating screen is an open device, which is harmful to both people and the environment. On the other hand, the presence of impurities will cause the storage space of the finished product tank to be occupied, and since the polymer polyol itself is viscous, impurities will cause them to clump in the finished product tank, which will cause the filter residue filtered out during the subsequent filtration process to carry more finished product materials, resulting in a lower product yield. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art in which impurities are removed and filtered before packaging the polymer polyol, resulting in the storage space of the finished product tank being occupied by impurities and a large amount of finished product material being taken away during filtration, resulting in a low product yield, thereby providing a continuous post-processing system for chemical products.

[0008] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0009] A continuous post-processing system for chemical products, comprising:

[0010] Intermediate tanks, connected to the production line, are used to store compounds containing impurities;

[0011] a filter connected to the intermediate tank, for filtering the compound containing impurities to obtain impurities and compounds;

[0012] The finished product tank is connected to the filter and is used to store the compound after impurities are removed.

[0013] Furthermore, the filter includes:

[0014] a cylinder connected to the intermediate tank;

[0015] A filter cartridge is installed in the cylinder, and the pore size of the filter cartridge is smaller than the particle size of the impurities;

[0016] a discharge valve, connected to the filter cartridge, for discharging the compound from the filter cartridge;

[0017] And, a sewage valve is connected to the cylinder and is used to discharge the impurities from the cylinder.

[0018] Furthermore, the filter further comprises a scraper system, which abuts against the inner surface of the filter cartridge and is used to scrape off impurities adsorbed on the outer surface of the filter cartridge.

[0019] Furthermore, the scraper system includes:

[0020] a scraper abutting against the inner surface of the filter cartridge;

[0021] and a driving source, assembled with the scraper, for driving the scraper to rotate along the inner surface of the filter cartridge.

[0022] Furthermore, the continuous post-processing system for chemical products also includes a material recovery unit, which is connected to the filter and is used to recover compounds in impurities.

[0023] Furthermore, the material recovery unit includes:

[0024] a solvent tank for storing a solvent capable of dissolving the compound;

[0025] a centrifugal separator, connected to the filter and the solvent tank, for separating the solid from the liquid after the solvent and impurities are mixed;

[0026] a filter residue bucket connected to the centrifuge and used to collect solid components output by the centrifuge;

[0027] and a collecting tank connected to the centrifuge for collecting liquid components outputted from the centrifuge.

[0028] Furthermore, the material recovery unit also includes a feed pump, one end of which is connected to the collection tank, and the other end of which is connected to the production line, for transporting the liquid component back to the production line.

[0029] Furthermore, the material recovery unit also includes an automatic filling device, which is used to replace the filter residue barrel after a predetermined mass of solid components is loaded into the filter residue barrel.

[0030] Furthermore, the automatic filling equipment includes:

[0031] Conveyor belt, used to carry the filter residue bucket;

[0032] A sensor is installed on the conveyor belt and is used to detect the quality of the filter residue barrel;

[0033] A driving assembly, assembled with the conveyor belt, for driving the conveyor belt to move so as to replace the filter residue barrel;

[0034] And, a controller is connected to the sensor and the driving component at the same time, and is used to control the operation of the driving component according to the signal transmitted by the sensor.

[0035] The technical solution of the present invention has the following advantages:

[0036] 1. The continuous post-processing system for chemical products provided by the present invention provides an intermediate tank and a filter before the finished product tank. The intermediate tank temporarily stores compounds containing impurities. The filter is connected to the intermediate tank to filter the compounds containing impurities. As a result, when the compounds are stored in the finished product tank, the impurities have been filtered out, thereby increasing the storage space of the compounds in the finished product tank. At the same time, it can prevent impurities from being stored in the compounds for a long time and absorbing more compounds, resulting in a lower yield of the compounds obtained after filtration.

[0037] 2. The continuous post-processing system for chemical products provided by the present invention, when the compound with impurities is transported to the filter, first, the impurities and the compound are both transported into the cylinder, and then under the action of the filter cartridge, the impurities are isolated between the filter cartridge and the cylinder, while the compound is transported to the inside of the filter cartridge and then discharged through the discharge valve, and the impurities isolated between the filter cartridge and the cylinder slide into the drain valve under the action of gravity and are then discharged through the drain valve. The structure is simple, the operation is convenient, and it is easy to implement.

[0038] 3. The continuous post-processing system for chemical products provided by the present invention provides a scraper system on the filter, which can scrape off impurities on the outer surface of the filter cartridge, thereby achieving automatic cleaning of the filter, reducing the workload of workers and lowering labor intensity.

[0039] 4. The present invention provides a continuous post-processing system for chemical products, and the scraper system includes a driving source and a scraper. The driving source can drive the scraper to rotate along the surface of the filter cartridge to scrape off impurities adsorbed on the filter cartridge. The filter can be cleaned by controlling the opening and closing of the driving source. The structure is simple and the operation is convenient.

[0040] 5. The continuous post-processing system for chemical products provided by the present invention recovers and reuses the compounds carried by impurities by setting up a material recovery unit, thereby reducing the waste of compounds and further improving the yield of compounds.

[0041] 6. In the continuous post-processing system for chemical products provided by the present invention, the impurities filtered out by the filter are transported to a centrifuge, and a solvent capable of dissolving the compound is transported to the centrifuge through a solvent tank. After the solvent and impurities are mixed in the centrifuge, the compound is dissolved in the solvent, and then the centrifuge is used to perform solid-liquid separation on the solvent and impurities, so that the compound is transferred to the solvent and separated, thereby realizing the recovery of the compound.

[0042] 7. The continuous post-processing system for chemical products provided by the present invention can further reduce the workload of workers and liberate labor by adding automatic filling equipment to automatically replace the filter residue barrel.

[0043] 8. The continuous post-processing system for chemical products provided by the present invention carries a plurality of filter residue barrels on a conveyor belt, and a sensor is provided at the corresponding position of each filter residue barrel. The sensor measures the total mass of the filter residue barrel in real time and transmits it to the controller. The controller stores a preset mass value. When the controller determines that the total mass of the filter residue barrel sensed by the sensor under the filter residue barrel being loaded with filter residue has reached the preset mass value, the drive component is controlled to work, thereby driving the conveyor belt to move to realize the switching of the filter residue barrel. The entire process can be fully automated and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 This is a schematic structural diagram of a continuous post-processing system for chemical products in Example 1 of the present invention;

[0046] Figure 2 Schematic diagram of the structure of the filter in Example 1 of the present invention;

[0047] Figure 3 This is a schematic structural diagram of the automatic filling equipment in Example 1 of the present invention;

[0048] Description of reference numerals:

[0049] 1. Intermediate tank; 2. Filter; 21. Cylinder; 22. Filter cartridge; 23. Discharge valve; 24. Drain valve; 25. Scraper system; 251. Scraper; 252. Drive source; 3. Finished product tank; 4. Material recovery unit; 41. Solvent tank; 42. Centrifuge; 43. Filter residue barrel; 44. Collection tank; 45. Feed pump; 46. Automatic filling equipment; 461. Conveyor belt; 462. Sensor; 463. Drive assembly; 464. Controller. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] Example 1

[0055] Combine Figure 1-3This embodiment relates to a continuous post-processing system for chemical products, including an intermediate tank 1, a filter 2 and a finished product tank 3.

[0056] Among them, the intermediate tank 1 is connected to the production line, and the intermediate tank 1 is used to store compounds containing impurities. The filter 2 is connected to the intermediate tank 1, and the filter 2 is used to filter the compounds containing impurities to obtain impurities and compounds respectively. The finished product tank 3 is connected to the filter 2, and the finished product tank 3 is used to store the compounds after impurities are removed.

[0057] By arranging the intermediate tank 1 and the filter 2 in front of the finished product tank 3, the intermediate tank 1 temporarily stores the compound containing impurities, and the filter 2 is connected to the intermediate tank 1 to filter the compound containing impurities, so that when the compound is stored in the finished product tank 3, the impurities have been filtered out, thereby increasing the storage space of the compound in the finished product tank 3, and at the same time preventing the impurities from being stored in the compound for a long time and absorbing more compounds, resulting in a lower yield of the compound obtained after filtration.

[0058] Specifically, intermediate tank 1 is connected to the last flash reactor on the production line. Filter 2 includes a barrel 21, a filter cartridge 22, a discharge valve 23, and a drain valve 24. Barrel 21 is connected to intermediate tank 1, and filter cartridge 22 is installed within barrel 21. The pore size of filter cartridge 22 is smaller than the particle size of impurities. Discharge valve 23 is connected to filter cartridge 22 and is used to discharge compounds from filter cartridge 22. Drain valve 24 is connected to barrel 21 and is used to discharge impurities from barrel 21.

[0059] When the compound with impurities is transported into the filter 2, first, the impurities and the compound are transported into the cylinder 21, and then under the action of the filter cartridge 22, the impurities are isolated between the filter cartridge 22 and the cylinder 21, and the compound is transported to the inside of the filter cartridge 22 and then discharged through the discharge valve 23. The impurities isolated between the filter cartridge 22 and the cylinder 21 slide into the drain valve 24 under the action of gravity and are then discharged through the drain valve 24.

[0060] Specifically, in order to achieve self-cleaning of the filter 2 , in this embodiment, a scraper system 25 is further provided on the filter 2 . The scraper system 25 abuts against the inner surface of the filter cartridge 22 , and is used to scrape off impurities adsorbed on the outer surface of the filter cartridge 22 .

[0061] The scraper system 25 includes a scraper 251 and a drive source 252, wherein the scraper 251 abuts against the inner surface of the filter cartridge 22, and the drive source 252 is assembled with the scraper 251, and the drive source 252 is used to drive the scraper 251 to rotate along the inner surface of the filter cartridge 22. Specifically, in this embodiment, the drive source 252 is a motor. In other embodiments, the drive source 252 can also be a rotary cylinder. When the filter 2 needs to be cleaned, the drive source 252 is turned on, so that the drive source 252 drives the scraper 251 to rotate along the inner surface of the filter cartridge 22. Under the action of the scraper 251, impurities adsorbed on the outer surface of the filter screen can be removed.

[0062] Furthermore, in order to further improve the yield of the compound, in this embodiment, the continuous post-processing system of the chemical product is also provided with a material recovery unit 4, which is connected to the filter 2 and is used to recover the compound carried away by the impurities during filtration.

[0063] The material recovery unit 4 includes a solvent tank 41, a centrifuge 42, a filter residue barrel 43 and a collection tank 44. The solvent tank 41 is used to store a solvent, which can dissolve the compound to be recovered. In this embodiment, the compound is a polymer polyol, and the solvent is isopropyl alcohol, methanol or a mixture of the two. The centrifuge 42 is connected to the filter 2 and the solvent tank 41. The centrifuge is used to separate the solvent from the impurities after the mixture is mixed with the impurities. The filter residue barrel 43 is connected to the centrifuge 42, and the filter residue barrel 43 is used to collect the solid components output by the centrifuge 42. The collection tank 44 is connected to the centrifuge 42, and the collection tank 44 is used to collect the liquid components output by the centrifuge 42.

[0064] The impurities obtained after filtration by the filter 2 are transported to the centrifuge 42, and a solvent that can dissolve the compound is transported to the centrifuge 42 through the solvent tank 41. After the solvent and impurities are mixed in the centrifuge 42, the compound is dissolved in the solvent, and then the centrifuge 42 is used to separate the solvent and impurities into solid and liquid, so that the compound is transferred to the solvent and separated, so that the compound can be recovered.

[0065] In this embodiment, centrifuge 42 is equipped with a self-starting program that allows for scheduled activation. Prior to activation, solvent tank 41 delivers a fixed amount of solvent to centrifuge 42 via a valve and pipeline. A mixing cage (not shown) is provided at the solid component outlet of centrifuge 42. This mixing cage is connected to filter residue bucket 43 via a valve. After centrifuge 42 ceases operation, the valve and mixing cage automatically open, allowing the solid component to be discharged into filter residue bucket 43.

[0066] In this embodiment, a feed pump 45 is further provided in the material recovery unit 4. One end of the feed pump 45 is connected to the collection tank 44, and the other end is connected to the production line. It is used to transport the liquid components separated by the centrifuge 42 back to the production line. Specifically, the feed pump 45 is connected to the first flash kettle in the production line.

[0067] In this embodiment, in order to further reduce the workload of workers, an automatic filling device 46 is further provided in the material recovery unit 4. The automatic filling device 46 is used to replace the filter residue barrel 43 after loading a predetermined mass of solid components into the filter residue barrel 43.

[0068] The automatic filling equipment 46 includes a conveyor belt 461, a sensor 462, a drive component 463 and a controller 464, wherein the conveyor belt 461 is used to carry the filter residue barrel 43, and multiple filter residue barrels 43 are carried on the conveyor belt 461 at the same time. The sensor 462 is installed on the conveyor belt 461 and is arranged one-to-one with the filter residue barrel 43 for detecting the quality of the filter residue barrel 43. The drive component 463 is assembled with the conveyor belt 461, and the drive component 463 is used to drive the conveyor belt 461 to move to realize the replacement of the filter residue barrel 43. The controller 464 is connected to the sensor 462 and the drive component 463 at the same time. The controller 464 is used to control the operation of the drive component 463 according to the signal transmitted by the sensor 462.

[0069] While the filter residue is continuously filled into the filter residue barrel 43, the sensor 462 measures the total mass of the filter residue barrel 43 in real time and transmits it to the controller 464. The controller 464 stores a preset mass value. When the controller 464 determines that the total mass of the filter residue barrel 43 sensed by the sensor 462 below the filter residue barrel 43 loading the filter residue has reached the preset mass value, the drive component 463 is controlled to work, thereby driving the conveyor belt 461 to move to realize the switching of the filter residue barrel 43. The entire process can be fully automated and easy to operate.

[0070] In this embodiment, the driving assembly 463 is a motor assembled with a driving wheel of the conveyor belt 461 .

[0071] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A continuous post-processing system for chemical products, characterized in that: include: Intermediate tanks, connected to the production line, are used to store compounds containing impurities; a filter connected to the intermediate tank, for filtering the compound containing impurities to obtain impurities and compounds; a finished product tank, connected to the filter, for storing the compound after impurities are removed; The filter includes: a cylinder connected to the intermediate tank; A filter cartridge is installed in the cylinder, and the pore size of the filter cartridge is smaller than the particle size of the impurities; a discharge valve, connected to the filter cartridge, for discharging the compound from the filter cartridge; and a drain valve connected to the cylinder for discharging the impurities from the cylinder; The filter further comprises a scraper system, the scraper system abutting against the inner surface of the filter cartridge and being used to scrape off impurities adsorbed on the outer surface of the filter cartridge; The scraper system comprises: a scraper abutting against the inner surface of the filter cartridge; and a driving source, assembled with the scraper, for driving the scraper to rotate along the inner surface of the filter cartridge; The continuous post-processing system for chemical products further comprises a material recovery unit, which is connected to the filter and is used to recover compounds from impurities; The material recovery unit comprises: a solvent tank for storing a solvent capable of dissolving the compound; a centrifugal separator, connected to the filter and the solvent tank, for separating the solid from the liquid after the solvent and impurities are mixed; a filter residue bucket connected to the centrifuge and used to collect solid components output by the centrifuge; and a collecting tank connected to the centrifuge for collecting liquid components outputted from the centrifuge; The material recovery unit further includes a feed pump, one end of which is connected to the collection tank and the other end is connected to the production line, for transporting the liquid component back to the production line; The material recovery unit further comprises an automatic filling device, which is used to replace the filter residue barrel after a predetermined mass of solid components is loaded into the filter residue barrel.

2. The continuous post-processing system for chemical products according to claim 1, characterized in that: The automatic filling equipment comprises: Conveyor belt, used to carry the filter residue bucket; A sensor is installed on the conveyor belt and is used to detect the quality of the filter residue barrel; A driving assembly, assembled with the conveyor belt, for driving the conveyor belt to move so as to replace the filter residue barrel; And, a controller is connected to the sensor and the driving component at the same time, and is used to control the operation of the driving component according to the signal transmitted by the sensor.

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