阅读说明：本技术 催化剂载体成球干燥方法及所采用的设备 (Catalyst carrier balling and drying method and adopted equipment ) 是由 范炳洪 王建新 夏萌梁 于 2019-08-14 设计创作，主要内容包括：本发明涉及一种催化剂载体成球干燥方法及所采用的设备,方法包括如下工艺步骤：成型→固化→干燥→出料,设备包括成型装置、固化装置和干燥装置,所述成型装置包括滴球盘和位于其下方的成球柱,固化装置包括连接在成球柱下部的水槽,水槽内设置有第一输送网带,干燥装置包括若干干燥箱和出料箱,干燥箱内设有循环风机、加热器和第二输送网带。本发明的催化剂载体成球干燥方法可以保证生产出的催化剂的球形度达到需要标准,且生产效率高；本发明所采用的设备结构简单,安装方便,水槽具有斜向上设置的输送段,保证固化时间,干燥箱内热利用率高,且无尾气流出,绿色环保。(The invention relates to a catalyst carrier balling and drying method and the adopted equipment, the method comprises the following process steps: shaping → solidification → drying → ejection of compact, equipment includes forming device, solidification equipment and drying device, forming device is including dripping the ball dish and being located its below balling-up post, and solidification equipment is including connecting the basin in balling-up post lower part, is provided with first conveying mesh belt in the basin, and drying device includes a plurality of drying cabinets and ejection of compact case, is equipped with circulating fan, heater and second conveying mesh belt in the drying cabinet. The catalyst carrier balling and drying method can ensure that the sphericity of the produced catalyst reaches the required standard and has high production efficiency; the equipment adopted by the invention has a simple structure, is convenient to install, ensures the curing time because the water tank is provided with the conveying section which is arranged obliquely upwards, has high heat utilization rate in the drying box, does not have tail gas outflow, and is green and environment-friendly.)

1. A catalyst carrier balling and drying method is characterized by comprising the following process steps:

(1) Molding: the catalyst slurry forms an alumina pellet through a dropping ball tray, and the catalyst pellet flows out after passing through a balling column;

(2) And (3) curing: the wet catalyst pellets fall into a water tank filled with the mixed solution until the catalyst pellets are suspended above a first conveying mesh belt in the water tank, and then the catalyst pellets are driven by the first conveying mesh belt to be conveyed and lifted out of the liquid level;

(3) And (3) drying: the catalyst pellets are lifted out of the liquid surface by the first conveying mesh belt and then enter a second conveying mesh belt in the drying device, hot air firstly passes through the bottom of the second conveying mesh belt and exchanges heat and mass with the catalyst pellets and further solidifies the catalyst pellets, and in the process, the catalyst pellets are in a suspension state, and the hot air dries and ages the catalyst pellets from top to bottom;

(4) discharging: and the dried catalyst pellets are conveyed to a discharge box through a second conveying mesh belt and then collected and output.

2. The method for drying catalyst carrier beads according to claim 1, characterized in that: and (3) solvent oil is arranged on the surface layer of the mixed solution in the step (2), and the density of the solvent oil is less than that of the mixed solution.

3. An apparatus used in a method for drying catalyst carrier beads according to claim 1, characterized in that: the device comprises a forming device, a curing device and a drying device, wherein the forming device comprises a ball dropping disc and a ball forming column located below the ball dropping disc, the curing device comprises a water tank connected to the lower portion of the ball forming column, a first conveying net belt is arranged in the water tank, the drying device comprises a plurality of drying boxes and a discharging box, and a circulating fan, a heater and a second conveying net belt are arranged in each drying box.

4. The apparatus used in the method for drying catalyst carrier balls according to claim 3, wherein: the lower part of the balling column is provided with a flange connected with the water tank, and the upper part of the balling column is provided with an observation window.

5. The apparatus used in the method for drying catalyst carrier balls according to claim 3, wherein: the water tank is provided with a horizontally arranged feeding section and an obliquely upwards arranged conveying section, the conveying section and the horizontal plane form an inclination angle of 20 degrees, and the high end of the conveying section is connected with the drying box through a flange.

6. The apparatus used in the method for drying catalyst carrier balls according to claim 3, wherein: the first conveying mesh belt comprises a conveying chain, a transmission chain wheel, a transmission motor speed reducer, a roller path and a mesh belt body, wherein the mesh belt body is fixed on the conveying chain, the transmission chain is arranged on the transmission chain wheel, and the transmission chain wheel rolls on the roller path and is driven to rotate by the transmission motor speed reducer.

7. The apparatus used in the method for drying catalyst carrier balls according to claim 6, wherein: and a guide rail is arranged at the turning part of the roller path.

8. The apparatus used in the method for drying catalyst carrier balls according to claim 7 is characterized in that: and the second conveying mesh belt and the first conveying mesh belt form a closed-loop conveying mesh belt.

9. The apparatus used in the method for drying catalyst carrier balls according to claim 3, wherein: the drying cabinet includes drying unit and later stage drying unit in earlier stage, and drying unit's circulating fan sets up lower part in the drying cabinet in earlier stage, and drying unit's circulating fan setting in later stage upper portion in the drying cabinet.

10. The apparatus used in the method for drying catalyst carrier balls according to claim 3, wherein: the heater is a steam heater, and a heat preservation and insulation layer is arranged on the heater.

11. The apparatus used in the method for drying catalyst carrier balls according to claim 3, wherein: the drying cabinet is provided with hydrofuge mouth and new trend and supplyes the mouth, is connected with the exhaust fan on the hydrofuge mouth, and the exhaust fan passes through the exhaust pipe and connects tail gas treatment system, and the junction of hydrofuge mouth and exhaust fan is provided with the heat preservation.

Technical Field

The invention relates to the technical field of catalyst carrier processing, in particular to a catalyst carrier balling and drying method and adopted equipment.

Background

When the catalyst or the catalyst carrier is used for catalytic reaction, the morphology of the catalyst or the catalyst carrier has great influence on the catalytic reaction, wherein when the spherical catalyst is used as the catalyst or the catalyst carrier, the spherical catalyst is contacted with each other in points, the stacking is uniform, the resistance of a bed layer is small, and the mass transfer and catalytic effects can be improved. The currently widely applied and mature method is an oil column forming method, and the prepared spherical catalyst has some defects such as low purity, limited pore structure regulation range, poor hydrothermal stability of the product and the like due to the limitation of the preparation method and the used raw materials. In order to overcome the above disadvantages, it is necessary to reduce impurities of the catalyst slurry, which requires an analytical test of the raw material; it is also necessary to improve the manufacturing equipment of forming, drying, aging, etc. and adjust the corresponding preparation method. In addition, the sphericity of the spherical catalyst is now required to be higher and higher in the fields of fine chemical engineering and petrochemical industry, and therefore, improvements in manufacturing equipment and preparation processes are imminent.

Disclosure of Invention

The invention aims to solve the technical problems that: overcomes the defects in the prior art and provides a catalyst carrier balling and drying method.

The technical scheme adopted by the invention for solving the technical problems is as follows: a catalyst carrier balling and drying method comprises the following process steps:

(1) Molding: catalyst slurry forms catalyst pellets through a dropping ball tray, and the catalyst pellets flow out after passing through a balling column;

(2) and (3) curing: the catalyst pellets fall into a water tank filled with the mixed solution until the catalyst pellets are suspended above a first conveying mesh belt in the water tank, and then the catalyst pellets are driven by the first conveying mesh belt to be conveyed and lifted out of the liquid level;

(3) and (3) drying: the wet catalyst pellets are lifted out of the liquid level by the first conveying mesh belt and then enter a second conveying mesh belt in the drying device, hot air firstly passes through the bottom of the second conveying mesh belt and exchanges heat and mass with the catalyst pellets and further solidifies the catalyst pellets, and in the process, the catalyst pellets are in a suspension state, and the hot air dries and ages the catalyst pellets from top to bottom;

(4) Discharging: and the dried catalyst pellets are conveyed to a discharge box through a second conveying mesh belt and then collected and output.

Further, the surface layer of the mixed solution in the step (2) is provided with the solvent oil, and the density of the solvent oil is less than that of the mixed solution. So set up, solvent oil floats on the mixed solution surface, and the catalyst pellet that flows out into the ball post makes it be the spherical whereabouts with the help of solvent oil's surface tension, gels rapidly after getting into the mixed solution.

the invention aims to solve another technical problem that: overcomes the defects in the prior art and provides equipment adopted by a catalyst carrier balling and drying method.

The technical scheme adopted by the invention for solving the technical problems is as follows: the equipment adopted by the catalyst carrier balling drying method comprises a forming device, a curing device and a drying device, wherein the forming device comprises a balling disc and a balling column positioned below the balling disc, the curing device comprises a water tank connected to the lower part of the balling column, a first conveying mesh belt is arranged in the water tank, the drying device comprises a plurality of drying boxes and a discharging box, and a circulating fan, a heater and a second conveying mesh belt are arranged in each drying box.

Furthermore, the lower part of the balling column is provided with a flange connected with the water tank, and the upper part of the balling column is provided with an observation window. The tube wiper window is arranged, so that the balling process can be observed conveniently.

furthermore, the water tank is provided with a horizontally arranged feeding section and an obliquely upwards arranged conveying section, the conveying section and the horizontal plane form an inclination angle of 20 degrees, and the high end of the conveying section is connected with the drying box through a flange.

Further, the first conveying mesh belt comprises a conveying chain, a transmission chain wheel, a transmission motor reducer, a roller path and a mesh belt body, wherein the mesh belt body is fixed on the conveying chain, the transmission chain is arranged on the transmission chain wheel, and the transmission chain wheel rolls on the roller path and is driven to rotate by the transmission motor reducer.

Furthermore, a guide rail is arranged at the turning part of the roller path. The guide rail is arranged at the turning part, so that the extrusion and the pulling of the edge of the mesh belt body are reduced.

Still further, the second mesh belt and the first mesh belt form a closed loop mesh belt. The closed-loop conveying net belt is powered by a transmission system, so that the space is saved.

Further, the drying cabinet includes earlier stage drying unit and later stage drying unit, and earlier stage drying unit's circulating fan sets up lower part in the drying cabinet, and later stage drying unit's circulating fan sets up upper portion in the drying cabinet. The early drying unit catalyst pellet has not solidified completely, in order to guarantee its sphere, needs the catalyst pellet to be in the suspended state, so circulating fan sets up lower part in the drying cabinet, has solidified before the catalyst pellet gets into later stage drying unit, can directly contact with the guipure, convenient transmission.

Furthermore, the heater is a steam heater, and a heat preservation and insulation layer is arranged on the heater. The arrangement is adopted, so that the temperature of the steam heater is prevented from influencing the temperature in the drying box, and the service life of the heater is ensured.

In order to guarantee that no tail gas is let in, the ejection of compact is revealed from the guipure body, ensure that environmental monitoring is up to standard, furtherly, the drying cabinet is provided with hydrofuge mouth and new trend replenishment mouth, is connected with the exhaust fan on the hydrofuge mouth, and the exhaust fan passes through the exhaust pipe and connects tail gas processing system, and the junction of hydrofuge mouth and exhaust fan is provided with the heat preservation. The joint of the moisture exhaust port and the exhaust fan is provided with a heat insulation layer to prevent the generation of condensed water.

The invention has the beneficial effects that: the catalyst carrier balling and drying method can ensure that the sphericity of the produced catalyst carrier reaches the required standard and has high production efficiency; the equipment adopted by the invention has a simple structure, is convenient to install, ensures the curing time because the water tank is provided with the conveying section which is arranged obliquely upwards, has high heat utilization rate in the drying box, does not have tail gas outflow, and is green and environment-friendly.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention.

Fig. 2 is a schematic view of the structure of fig. 1 in the direction a.

Figure 3 is a sectional view of a drying cabinet in the apparatus of the present invention.

In the figure: 1. the device comprises a balling column, 2 parts of a water tank, 3 parts of a first conveying mesh belt, 4 parts of a drying box, 5 parts of a discharging box, 6 parts of a circulating fan, 7 parts of a heater, 8 parts of a second conveying mesh belt, 9 parts of an exhaust fan, 10 parts of an exhaust pipe, 31 parts of a conveying chain, 32 parts of a transmission chain wheel, 33 parts of a transmission motor reducer, 34 parts of a guide rail and 35 parts of a mesh belt body.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.