An integrated machine for segmented drying of an organic amine molecular sieve slurry

Abstract

The present invention discloses a segmented drying all-in-one machine for molecular sieve slurry containing organic amine, comprising a frame, a driving mechanism, an airflow pipe, a breaking-up mechanism and a crushing mechanism. One side of the frame is provided with a driving mechanism and the other side is sealed with an airflow pipe. The driving mechanism is connected to the breaking-up mechanism and the crushing mechanism. The breaking-up mechanism and the crushing mechanism are both arranged in the airflow pipe. The end of the airflow pipe is sealed. The airflow pipe is provided with a feed port, an air inlet, a discharge port and an exhaust port. The present invention greatly increases the contact area between the drying gas and the material through the continuous stirring of the breaking-up mechanism. While evaporating water, it ensures that the organic amine is quickly removed in a very short time, effectively preventing the material from agglomerating and being insufficiently dried, and improving the product quality. The crushing mechanism at the bottom can effectively continue to crush the material blocks that are not broken up or agglomerated by the breaking-up mechanism to prevent them from accumulating at the discharge port and blocking the discharge, thereby greatly improving the product quality, drying effect and equipment stability.

Description

Technical Field

[0001] The present invention relates to the technical field of catalyst preparation, in particular to a segmented drying integrated machine for molecular sieve slurry containing organic amine. Background Art

[0002] MTO catalyst is the abbreviation of methanol to olefins catalyst, that is, the catalyst used in the process of producing olefins (ethylene and propylene) from methanol with high selectivity. The main component is SAPO-34 molecular sieve with three-dimensional 8-membered ring cross-pores, which has the characteristics of high selectivity for low-carbon olefins (ethylene + propylene selectivity greater than 80%).

[0003] The production process for MTO catalysts is long, resulting in low product yields and high manufacturing costs. This led to the development of a shortened-process SAPO-34 molecular sieve production technology. Laboratory studies on small-scale units have shown that this technology can produce MTO catalysts with comparable performance. Scale-up tests on industrial units have shown that existing production equipment cannot meet the requirements for rapid drying of molecular sieve slurries containing organic amines. The drying process results in agglomeration of the material, difficulty in removing and recovering the organic amines, and poor drying results, resulting in low product quality. These issues include agglomeration during slurry drying, the staged removal and drying of the organic amines and molecular sieves, and overall drying efficiency.

[0004] Therefore, there is an urgent need to develop an integrated drying equipment suitable for SAPO-34 molecular sieve slurry containing organic amines to provide equipment and technical support for the industrial application of short-process SAPO-34 molecular sieve production technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a segmented drying integrated machine for molecular sieve slurry containing organic amine to solve the problems existing in the above-mentioned prior art, so that the organic amine and molecular sieve can be removed and dried segment by segment at the same time, which is efficient and can recover the organic amine, thereby improving product quality and drying effect.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides an all-in-one machine for segmented drying of molecular sieve slurry containing organic amines, comprising a frame, a driving mechanism, an airflow pipe, a breaking up mechanism and a crushing mechanism. The driving mechanism is provided on one side of the frame and the airflow pipe is sealed on the other side. The driving mechanism is connected to the breaking up mechanism and the crushing mechanism. Both the breaking up mechanism and the crushing mechanism are arranged in the airflow pipe. The end of the airflow pipe is sealed. The airflow pipe is provided with a feed port, an air inlet, a discharge port and an exhaust port.

[0008] Preferably, the driving mechanism includes a motor, a pulley transmission mechanism and a transmission shaft. The rotating shaft of the motor is connected to the transmission shaft through the pulley transmission mechanism, and the transmission shaft is connected to the breaking up mechanism or the crushing mechanism.

[0009] Preferably, a bearing seat is provided on the frame, the transmission shaft is connected to the bearing seat via a bearing, the transmission shaft is connected to the rotating shaft of the breaking mechanism or the crushing mechanism via a coupling, and the rotating shaft passes through the top plate of the frame.

[0010] Preferably, the crushing mechanism includes a rotating shaft, a rotating disk and crushing blades, two layers of the rotating disk are concentrically arranged at the lower end of the rotating shaft, and a plurality of the crushing blades are evenly distributed circumferentially between the two layers of the rotating disks, and the diameter of the rotating disk is smaller than the diameter of the airflow tube.

[0011] Preferably, the turntable is provided with weight-reducing holes, the discharge port is provided on the side wall of the air flow tube at the crushing mechanism, and the side wall of the air flow tube at the crushing mechanism is provided with pits and protrusions.

[0012] Preferably, the turntable is fixedly connected to the rotating shaft via a shaft sleeve, and the turntable and the crushing blades are both welded to the shaft sleeve.

[0013] Preferably, the breaking up mechanism is provided at the upper end of the rotating shaft, and the breaking up mechanism includes a stirring paddle and rake teeth. The stirring paddles are evenly distributed around the circumference of the rotating shaft, and the rake teeth are welded to the ends of the stirring paddles.

[0014] Preferably, the stirring paddles are provided in three layers, with two stirring paddles provided in a collinear manner in each layer, and the stirring paddles in adjacent layers are staggered at an angle of 60° clockwise or counterclockwise around the rotating shaft.

[0015] Preferably, the rake teeth are arranged at an obtuse angle to the radial direction of the rotating shaft, the stirring paddle is welded to a shaft sleeve, and the stirring paddle is fixedly connected to the rotating shaft through the shaft sleeve.

[0016] Preferably, a feed pipe is inserted into the feed port, the feed pipe is L-shaped and a nozzle is provided at the end, the nozzle is coaxially arranged with the rotating shaft, and the feed port and the feed pipe are densely connected by a flange.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] During the airflow drying process of the molecular sieve slurry containing organic amines of the present invention, the contact area between the drying gas and the material is greatly increased through the continuous stirring of the breaking mechanism, while the water is evaporated, the organic amine is ensured to be quickly removed in a very short time, effectively preventing the material from agglomerating and insufficiently drying, and improving the product quality. The crushing mechanism at the bottom can effectively continue to crush the material blocks that have not been broken up or agglomerated by the breaking mechanism, preventing them from accumulating at the discharge port and blocking the discharge, thereby greatly improving the product quality, drying effect and equipment stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only 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.

[0020] Figure 1 This is a schematic structural diagram of the integrated machine for drying organic amine molecular sieve slurry in sections according to the present invention;

[0021] Among them: 1-air flow pipe, 2-exhaust port, 3-air inlet, 4-dispersing mechanism, 41-stirring paddle, 42-rake teeth, 5-rotating shaft, 51-shaft sleeve, 6-crushing mechanism, 61-turntable, 62-crushing blades, 7-discharge port, 8-coupling, 9-frame, 10-bearing seat, 11-motor, 12-drive shaft, 13-pulley transmission mechanism, 14-nozzle, 15-feed pipe, 16-feed port, 17-flange, 100-staged drying all-in-one machine for molecular sieve slurry containing organic amine. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a segmented drying integrated machine for molecular sieve slurry containing organic amine to solve the problems existing in the prior art, so that the organic amine and molecular sieve can be removed and dried segment by segment at the same time, which is efficient and can recover the organic amine, thereby improving product quality and drying effect.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1As shown: This embodiment provides a segmented drying all-in-one machine for molecular sieve slurry containing organic amines, including a frame 9, a driving mechanism, an airflow pipe 1, a breaking up mechanism 4 and a crushing mechanism 6. A driving mechanism is provided on one side of the frame 9, and an airflow pipe 1 is sealed on the other side. The driving mechanism is connected to the breaking up mechanism 4 and the crushing mechanism 6. The breaking up mechanism 4 and the crushing mechanism 6 are both arranged in the airflow pipe 1. The end of the airflow pipe 1 is sealed. A feed port 16, an air inlet 3, a discharge port 7 and an exhaust port 2 are provided on the airflow pipe 1. The ends of the feed port 16, the air inlet 3, the discharge port 7 and the exhaust port 2 are all provided with a flange 17 for connection. The feed port 16 is used to pass the molecular sieve slurry, the air inlet 3 is used to pass the drying gas, the exhaust port 2 is used to discharge the water vapor, organic amine, dry circulating gas and other gases after the material is dried, and the discharge port 7 is used to discharge the dried powder product.

[0026] The drive mechanism includes a motor 11, a pulley transmission mechanism 13, and a transmission shaft 12. The rotating shaft 5 of the motor 11 is connected to the transmission shaft 12 via the pulley transmission mechanism 13. The transmission shaft 12 is connected to the scattering mechanism 4 or the crushing mechanism 6. A bearing seat 10 with a vertical shaft hole is provided on the frame 9. The transmission shaft 12 is connected to the bearing seat 10 via a bearing. The transmission shaft 12 is connected to the rotating shaft 5 of the scattering mechanism 4 or the crushing mechanism 6 via a coupling 8. The rotating shaft 5 passes through the top plate of the frame 9.

[0027] The crushing mechanism 6 comprises a rotating shaft 5, a rotating disc 61, and crushing blades 62. Two concentrically arranged rotating discs 61 are positioned at the lower end of the rotating shaft 5. Several crushing blades 62 are evenly spaced circumferentially between the two rotating discs 61. The diameter of the rotating disc 61 is smaller than that of the airflow tube 1 to prevent it from getting stuck. Lightening holes are provided in the rotating disc 61, significantly reducing its weight. A discharge port 7 is located on the sidewall of the airflow tube 1 at the location of the crushing mechanism 6. The sidewall of the airflow tube 1 at the location of the crushing mechanism 6 is designed with recesses and protrusions to increase friction and shear forces on the material. The rotating disc 61 is fixedly connected to the rotating shaft 5 via a sleeve 51. The sleeve 51 is keyed to the rotating shaft 5, facilitating replacement of the rotating disc 61 and crushing blades 62. Both the rotating disc 61 and crushing blades 62 are welded to the sleeve 51. The rotating disc 61 of this embodiment allows for continued crushing of unbroken or agglomerated material lumps from the breaker, while also preventing material from accumulating at the discharge port 7 and obstructing discharge.

[0028] The upper end of the rotating shaft 5 is provided with a dispersing mechanism 4, which includes a stirring paddle 41 and rake teeth 42. The stirring paddle 41 is evenly distributed around the circumference of the rotating shaft 5, and the rake teeth 42 are welded to the end of the stirring paddle 41. The stirring paddle 41 is provided with three layers, with two stirring paddles 41 arranged in a collinear manner on each layer. The stirring paddles 41 of adjacent layers are staggered at 60° clockwise or counterclockwise around the rotating shaft 5, which is more conducive to dispersing the material. The rake teeth 42 are arranged at an obtuse angle to the radial direction of the rotating shaft 5. The stirring paddle 41 is welded to a sleeve 51. The stirring paddle 41 is fixedly connected to the rotating shaft 5 through the sleeve 51. The sleeve 51 and the rotating shaft 5 are connected by a key, which is convenient for replacing the stirring paddle 41 and the rake teeth 42. The dispersing mechanism 4 of this embodiment can break up the molecular sieve slurry blocks that have just entered the air flow tube 1 into fine and small blocks, effectively preventing the slurry from agglomerating and sinking to the bottom. At the same time, it also increases the contact area between the material and the drying gas, can remove organic amines and moisture in a very short time, and has a rapid drying effect.

[0029] A feed pipe 15 is inserted into the feed port 16. The feed pipe 15 is L-shaped and has a nozzle 14 at its end. The nozzle 14 is coaxial with the rotating shaft 5. The feed port 16 and the feed pipe 15 are tightly connected by a flange 17, which allows for easy fixing and removal of the feed pipe 15 and the nozzle 14. The nozzle 14 of this embodiment is located at the centerline of the gas flow tube 1 and sprays the molecular sieve slurry vertically downward to achieve a more dispersed material. The interior of the feed pipe 15 is coated with a thermal insulation material to prevent the high-temperature dry gas from heating the nozzle pipe, which would increase the viscosity of the molecular sieve slurry in the pipe and block the nozzle 14. The nozzle 14 is located slightly above the dry gas inlet 3.

[0030] In this embodiment, since the fluid resistance drop above the nozzle 14 is small and the resistance drop below is large, the gas phase (including water vapor and organic ammonia gas phase) will flow out from the upper exhaust port 2, and the solid phase powder will flow out from the discharge port 7, thereby achieving the purpose of segmented removal. The drying process and the removal of organic ammonia are carried out simultaneously, and the dried material enters different flow channels. The gas phase coming out of the exhaust port 2 can be condensed to recover the organic ammonia, and the solid phase coming out of the discharge port 7 enters the bag dust collector for collection.

[0031] The segmented drying all-in-one machine of this embodiment can quickly remove the organic amine in the molecular sieve slurry containing organic amine by a drying method of direct heating by air flow. The contact area between the drying gas and the material is greatly improved by the continuous stirring of the breaking mechanism 4, which ensures that the organic amine is quickly removed in a very short time. The removed organic ammonia gas phase is discharged from the exhaust port 2, collected and reused after passing through the condenser, and the molecular sieve powder with organic ammonia removed comes out from the discharge port 7 and enters the bag dust removal system for collection as the final product; it effectively prevents the material from agglomerating and insufficiently drying, and improves the product quality. The crushing mechanism 6 at the bottom can effectively continue to crush the material blocks that are not broken up or agglomerated by the breaking mechanism 4 to prevent them from accumulating at the discharge port. Port 7 blocks the discharge, greatly improving the stability of the equipment; effectively utilizing the characteristics of fluid air resistance, the upper flow resistance of the air flow tube 1 is small, and the lower flow resistance is large, so that the removed organic amine gas phase and the dried molecular sieve powder flow through different flow channels respectively, the organic ammonia flows out from the exhaust port 2, and the molecular sieve powder flows out from the discharge port 7; greatly reducing the content of organic amine in the molecular sieve, and facilitating the recovery of organic amine, effectively combining the removal of organic amine and the drying of molecular sieve on one device, which can efficiently remove and dry the organic amine SAPO-34 and the molecular sieve in sections, and recover the organic amine, reducing production costs, and providing equipment technical support for the industrial application of short-process SAPO-34 molecular sieve production technology.

[0032] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A staged drying machine for molecular sieve slurry containing organic amine, characterized by: The machine comprises a frame, a driving mechanism, an airflow pipe, a breaking up mechanism and a crushing mechanism. The driving mechanism is provided on one side of the frame and the airflow pipe is sealed and connected to the other side. The driving mechanism is connected to the breaking up mechanism and the crushing mechanism. Both the breaking up mechanism and the crushing mechanism are provided in the airflow pipe. The end of the airflow pipe is sealed. The airflow pipe is provided with a feed port, an air inlet, a discharge port and an exhaust port. The feed port is used for introducing molecular sieve slurry, the air inlet is used for introducing drying gas, the exhaust port is used for discharging water vapor, organic amine and drying cycle gas after the material is dried, and the discharge port is used for discharging the dried powder product. The crushing mechanism includes a rotating shaft, a rotating disk and crushing blades. Two layers of the rotating disks are concentrically arranged at the lower end of the rotating shaft. A plurality of crushing blades are evenly distributed circumferentially between the two layers of the rotating disks. The diameter of the rotating disk is smaller than the diameter of the airflow tube. The upper end of the rotating shaft is provided with the breaking mechanism; A feed pipe is inserted into the feed port, the feed pipe is L-shaped and has a nozzle at the end, the nozzle is coaxially arranged with the rotating shaft, and the feed port and the feed pipe are densely connected by a flange; The nozzle is located above the drying gas inlet.

2. The integrated staged drying machine for molecular sieve slurry containing organic amine according to claim 1, characterized in that: The driving mechanism includes a motor, a pulley transmission mechanism and a transmission shaft. The rotating shaft of the motor is connected to the transmission shaft through the pulley transmission mechanism, and the transmission shaft is connected to the breaking mechanism or the crushing mechanism.

3. The integrated staged drying machine for molecular sieve slurry containing organic amine according to claim 2, characterized in that: A bearing seat is provided on the frame, the transmission shaft is connected to the bearing seat through a bearing, the transmission shaft is connected to the rotating shaft of the scattering mechanism or the crushing mechanism through a coupling, and the rotating shaft passes through the top plate of the frame.

4. The integrated staged drying machine for molecular sieve slurry containing organic amine according to claim 1, characterized in that: The turntable is provided with weight-reducing holes, the discharge port is provided on the side wall of the air flow tube at the crushing mechanism, and the side wall of the air flow tube at the crushing mechanism is provided with pits and protrusions.

5. The integrated staged drying machine for molecular sieve slurry containing organic amine according to claim 1, characterized in that: The rotating disc is fixedly connected to the rotating shaft via a shaft sleeve, and the rotating disc and the crushing blades are both welded to the shaft sleeve.

6. The integrated staged drying machine for molecular sieve slurry containing organic amine according to claim 1, characterized in that: The dispersing mechanism includes a stirring paddle and rake teeth. The stirring paddles are evenly distributed around the circumference of the rotating shaft, and the rake teeth are welded to the ends of the stirring paddles.

7. The integrated staged drying machine for molecular sieve slurry containing organic amine according to claim 6, characterized in that: The stirring paddles are arranged in three layers, with two stirring paddles arranged in a collinear manner in each layer. The stirring paddles in adjacent layers are staggered at an angle of 60° clockwise or counterclockwise around the rotating shaft.

8. The integrated staged drying machine for molecular sieve slurry containing organic amine according to claim 7, characterized in that: The rake teeth are arranged at an obtuse angle to the radial direction of the rotating shaft. The stirring paddle is welded to a shaft sleeve, and the stirring paddle is fixedly connected to the rotating shaft through the shaft sleeve.

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