Maleic anhydride feeding system

Abstract

The utility model provides a maleic anhydride feeding system which comprises a feeding bin, a bag breaking machine, a crusher, a buffer bin, a spiral conveyor, a dust removal device and a washing tower, the feeding bin is provided with a first sealing door, the bag breaking machine is connected with the feeding bin, a second sealing door is arranged between the bag breaking machine and the feeding bin, and an inlet of the crusher is connected with an outlet in the bottom of the bag breaking machine; an inlet of the spiral conveyor is connected with an outlet in the bottom of the buffer bin; an outlet is connected with a reaction kettle; the dust removal double device comprises an air pipe and a fan arranged on the air pipe, the air inlet end of the air pipe is connected to the feeding bin and the bag breaking machine, the air outlet end of the air pipe is connected with an air inlet of the washing tower, and a spraying device is arranged in the washing tower; the first sealing door of the feeding bin and the second sealing door of the bag breaking machine are closed so that dust can be prevented from being scattered out, the dust removal device can send the dust in the feeding bin and the bag breaking machine into the washing tower, dust falling treatment is conducted through the spraying device, and the dust is prevented from entering the external environment.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a maleic anhydride feeding system. Background Art

[0002] Maleic anhydride, also known as maleic anhydride, maleic anhydride, 2,5-furandione, etc. Orthorhombic colorless needle-shaped or flaky crystals. Has a strong pungent odor. Reacts with hot water to form maleic acid. Mainly used as a raw material for the production of unsaturated polyester resins, alkyd resins, pesticide malathion, high-efficiency and low-toxic pesticide 4049, and long-acting iodine amine. It is also a comonomer of coatings, maleic rosin, polymaleic anhydride, maleic anhydride-styrene copolymers, and an organic chemical raw material for the production of ink additives, papermaking additives, plasticizers, tartaric acid, fumaric acid, tetrahydrofuran, etc.

[0003] Maleic anhydride is a powdery material with certain toxicity. As a raw material, it will produce dust during the production process, which will affect the production environment. Therefore, a solution is urgently needed to solve the dust problem of existing maleic anhydride raw materials. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a maleic anhydride feeding system capable of removing dust.

[0005] A maleic anhydride feeding system provided by the utility model comprises:

[0006] A feed bin, wherein the feed bin is provided with a first closed door;

[0007] A bag breaker, the bag breaker is connected to the feed bin, and a second closed door is provided between the bag breaker and the feed bin;

[0008] A crusher, the inlet of which is connected to the outlet at the bottom of the bag breaking machine;

[0009] A buffer silo, the inlet of which is connected to the outlet at the bottom of the crusher;

[0010] A screw conveyor, wherein the inlet of the screw conveyor is connected to the outlet at the bottom of the buffer silo, and the outlet of the screw conveyor is used to connect to the reactor;

[0011] A dust removal device, the dust removal device comprising an air duct and a fan arranged on the air duct, the air inlet end of the air duct being connected to the feed bin and the bag breaker;

[0012] A washing tower, wherein the air inlet of the washing tower is connected to the air outlet end of the air duct, and a spray device is arranged in the washing tower.

[0013] In one embodiment of the utility model, the feed bin is arranged on the side of the bag breaking machine, and a material guide plate inclined downward from the first closed door to the second closed door is provided at the bottom of the feed bin, and the material guide plate extends out of the feed bin from the bottom of the first closed door.

[0014] In one embodiment of the present invention, a star-shaped discharger is provided at the outlet of the buffer silo.

[0015] In one embodiment of the utility model, it also includes a frame, and the bag breaker, the crusher and the buffer silo are fixed on the frame from top to bottom.

[0016] In one embodiment of the utility model, a transversely extending track is provided on the top of the frame, and a crane is provided on the track, and the crane is used to load materials into the feed bin.

[0017] One beneficial effect of the utility model is that the bagged maleic anhydride raw material sequentially enters the connected feed bin, bag breaker, crusher, buffer bin, and screw conveyor, and is transported to the reactor by the screw conveyor. The first closed door of the feed bin and the second closed door of the bag breaker are closed to prevent dust from being scattered. The air duct and fan of the dust removal device can send the dust in the feed bin and the bag breaker into the washing tower for dust reduction treatment through the spray device, thereby preventing dust from entering the external environment and ensuring a dust-free production environment.

[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of the maleic anhydride feeding system provided by the utility model.

[0021] The one-to-one correspondence between component names and reference numerals is as follows:

[0022] 1. Feed bin; 11. First closed door; 12. Guide plate;

[0023] 2. Bag breaking machine; 21. Second closed door;

[0024] 3. Crusher;

[0025] 4. Buffer silo; 41. Star-shaped discharger;

[0026] 5. Screw conveyor;

[0027] 6. Dust removal device; 61. Air duct; 62. Fan;

[0028] 7. Scrubber; 71. Spraying device; 72. Water collecting tank; 73. Circulating water pipe; 74. Water pump;

[0029] 8. frame; 81. track;

[0030] 9. Crane;

[0031] 10. Reactor. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0035] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0036] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0037] The utility model provides a maleic anhydride feeding system, comprising a feeding bin 1, a bag breaker 2, a crusher 3, a buffer bin 4, a screw conveyor 5, a dust removal device 6 and a washing tower 7.

[0038] The feed bin 1 is provided with a first closed door 11, the bag breaker 2 is connected to the feed bin 1, and a second closed door 21 is provided between the bag breaker 2 and the feed bin 1. The first closed door 11 is used to open or close the entrance of the feed bin 1, and the second closed door 21 is used to open or close the entrance of the bag breaker 2. An outlet is provided at the bottom of the bag breaker 2. After the first closed door 11 is opened, the bagged maleic anhydride raw material can be put into the feed bin 1, and after the second closed door 21 is opened, the bagged maleic anhydride raw material in the feed bin 1 can enter the bag breaker 2, and the bag breaker 2 can cut the packaging bag to make the maleic anhydride raw material fall to the outlet at the bottom of the bag breaker 2.

[0039] The crusher 3 is arranged below the bag breaker 2, and the inlet of the crusher 3 is connected to the outlet at the bottom of the bag breaker 2, and an outlet is arranged at the bottom of the crusher 3. The maleic anhydride raw material enters the crusher 3 from the outlet of the bag breaker 2. The crusher 3 is provided with a gear structure, which can crush the large maleic anhydride raw material into small maleic anhydride raw materials, and the small maleic anhydride raw materials fall to the outlet at the bottom of the crusher 3.

[0040] The buffer bin 4 is arranged below the crusher 3, the inlet of the buffer bin 4 is connected to the outlet at the bottom of the crusher 3, and an outlet is arranged at the bottom of the buffer bin 4. The small pieces of maleic anhydride raw materials crushed by the crusher 3 enter the buffer bin 4, and the buffer bin 4 can temporarily store the maleic anhydride raw materials.

[0041] The screw conveyor 5 is arranged below the buffer silo 4, and the inlet of the screw conveyor 5 is connected to the outlet at the bottom of the buffer silo 4. The outlet of the screw conveyor 5 is used to connect the reactor.

[0042] A star-shaped discharger 41 is provided at the outlet of the buffer silo 4, and the star-shaped discharger 41 can seal the outlet of the buffer silo 4. When the star-shaped discharger 41 is working, the maleic anhydride raw material in the buffer silo 4 can be sent to the screw conveyor 5, and the screw conveyor 5 then transports the maleic anhydride raw material to the reactor.

[0043] The dust removal device 6 includes an air duct 61 and a fan 62 arranged on the air duct 61, and the fan 62 forms a negative pressure in the air duct 61. The air inlet end of the air duct 61 is connected to the feed bin 1 and the bag breaker 2. The washing tower 7 is provided with an air inlet, and the air outlet end of the air duct 61 is connected to the air inlet of the washing tower 7. The feed bin 1 and the bag breaker 2 are respectively provided with air outlets for discharging dust, and the air duct 61 is respectively connected to the air outlets of the feed bin 1 and the bag breaker 2. The fan 62 pumps the dust in the feed bin 1 and the bag breaker 2 to the washing tower 7 through the air duct 61.

[0044] The washing tower 7 is provided with a spray device 71, which sprays water mist into the washing tower 7 to remove dust in the airflow sent into the washing tower 7 by the air duct 61. The top of the washing tower 7 is provided with an air outlet, which is used to discharge the airflow after the dust is reduced by the spray device 71.

[0045] Furthermore, a water collecting tank 72 is provided at the bottom of the washing tower 7, and the water mist sprayed by the spraying device 71 can fall into the water collecting tank 72. The water collecting tank 72 is connected to the spraying device 71 through a circulating water pipe 73, and a water pump 74 is connected to the circulating water pipe 73. The water pump 74 transports the water in the water collecting tank 72 to the spraying device 71 through the circulating water pipe 73, so as to realize the recycling of water and save water resources.

[0046] After a period of use, the water in the water collection tank 72 contains more maleic anhydride, which can be sent to the reactor 10 for use as a solvent, which can save resources. The water collection tank 72 can be connected to the reactor 10 through a pipeline, and a valve is installed on the pipeline to control the opening and closing of the pipeline.

[0047] The feeding bin 1, bag breaker 2, crusher 3, buffer bin 4 and screw conveyor 5 of the maleic anhydride feeding system form a closed channel connected in sequence. After the maleic anhydride raw material enters the closed channel, the generated dust can only pass through the dust removal device 6 and enter the washing tower 7 for spray washing, so the dust will not enter the outside air and affect the production environment.

[0048] In a specific embodiment, the feed bin 1 is arranged on the side of the bag breaker 2, the first closed door 11 is arranged on the side away from the bag breaker 2, and a guide plate 12 is arranged at the bottom of the feed bin 1, which is inclined downward from the first closed door 11 to the second closed door 21, and the guide plate 12 extends out of the feed bin 1 from the bottom of the first closed door 11. The bagged maleic anhydride raw material is placed on the top of the guide plate 12, and after the first closed door 11 is opened, the bagged maleic anhydride raw material can slide into the feed bin 1 along the guide plate 12, and after the second closed door 21 is opened, the bagged maleic anhydride raw material can continue to slide into the bag breaker 2 along the guide plate 12.

[0049] In one embodiment, the maleic anhydride feeding system further comprises a frame 8, which is used for installing the foundation, and the bag breaker 2, the crusher 3 and the buffer bin 4 are fixed from top to bottom on the frame 8. Maleic anhydride raw materials can fall from the bag breaker 2 into the crusher 3 under the action of gravity, and then fall into the buffer bin 4.

[0050] Furthermore, a horizontally extending track 81 is provided on the top of the frame 8, and a crane 9 is provided on the track 81, and the crane 9 is used to load materials into the feed bin 1. The crane 9 can move along the track 81 in a direction away from or close to the first closed door 11, and the lifting and lowering mechanical claw of the crane 9 can grab the bagged maleic anhydride raw material and put it on the guide plate 12 of the feed bin 1, so that the bagged maleic anhydride raw material can enter the opened first closed door 11 along the guide plate 12.

[0051] During loading, the first closed door 11 is opened, the second closed door 21 is closed, and the crane 9 puts the bagged maleic anhydride raw material into the feed bin 1. At this time, the second closed door 21 is closed to prevent the dust in the bag breaker 2 from entering the feed bin 1, thereby preventing the dust from entering the external environment when the first closed door 11 is opened next time; then, the first closed door 11 is closed, the second closed door 21 is opened, and the bagged maleic anhydride raw material enters the bag breaker 2 along the guide plate 12. At this time, the first closed door 11 is closed to prevent the dust from being dispersed; the dust removal device 6 draws the dust in the feed bin 1 and the bag breaker 2 into the washing tower 7 for dust reduction treatment, thereby ensuring that the dust in the maleic anhydride feeding system will not enter the external environment.

[0052] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present invention is defined by the appended claims.

Claims

1. A maleic anhydride feeding system, characterized in that: include: A feed bin, wherein the feed bin is provided with a first closed door; A bag breaker, the bag breaker is connected to the feed bin, and a second closed door is provided between the bag breaker and the feed bin; A crusher, the inlet of which is connected to the outlet at the bottom of the bag breaking machine; A buffer silo, the inlet of which is connected to the outlet at the bottom of the crusher; A screw conveyor, wherein the inlet of the screw conveyor is connected to the outlet at the bottom of the buffer silo, and the outlet of the screw conveyor is used to connect to the reactor; A dust removal device, the dust removal device comprising an air duct and a fan arranged on the air duct, the air inlet end of the air duct being connected to the feed bin and the bag breaker; A washing tower, wherein the air inlet of the washing tower is connected to the air outlet end of the air duct, and a spray device is arranged in the washing tower.

2. The maleic anhydride feeding system according to claim 1, characterized in that: The feed bin is arranged on the side of the bag breaking machine, and a guide plate inclined downward from the first closed door to the second closed door is arranged at the bottom of the feed bin, and the guide plate extends out of the feed bin from the bottom of the first closed door.

3. The maleic anhydride feeding system according to claim 1, characterized in that: A star-shaped discharger is arranged at the outlet of the buffer silo.

4. The maleic anhydride feeding system according to any one of claims 1 to 3, characterized in that: It also includes a frame, and the bag breaker, the crusher and the buffer bin are fixed on the frame from top to bottom.

5. The maleic anhydride feeding system according to claim 4, characterized in that: A transversely extending track is arranged on the top of the frame, and a crane is arranged on the track. The crane is used for feeding materials into the feed bin.

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