A rolling type glue-making machine, a glue-making system, and a glue-making method.

Abstract

This disclosure relates to a roller-type glue-making machine, a glue-making system, and a glue-making method. The roller-type glue-making machine includes a feeding section, a grinding and glue-making section, a drive device, and a screw conveyor section. The feeding section has a powder inlet, a colloid inlet, and a liquid inlet located above the grinding and glue-making section. The grinding and glue-making section includes a first roller rotor and a second roller rotor arranged horizontally along the axial direction. The first and second roller rotors are pivotally mounted and mesh with each other. The first roller rotor is connected to the drive device via a shaft. The feed inlet of the screw conveyor section is located below the grinding and glue-making section to deliver the colloid from the grinding and glue-making section out of the roller-type glue-making machine. The roller-type glue-making machine of this disclosure can resist the impact of solid impurities in the raw materials, prevents clogging, and enables continuous colloid preparation. The catalyst prepared using this colloid has superior catalyst strength, wear resistance, activity, and hydrothermal stability.

Description

Technical Field

[0001] This application relates to a rolling adhesive mill, an adhesive production system, and a method for producing adhesive. Background Technology

[0002] In industrial production such as chemical engineering, processes such as mixing, kneading, and humidifying one or more solid powders with one or more liquids or colloids are frequently encountered. These processes are generally completed using intermittent stirring. For example, in the colloid preparation process of cracking catalysts, the current method involves adding the raw materials for preparing the catalyst colloid (such as water, alumina sol, molecular sieve slurry) and powder raw materials (kaolin, boehmite) to a gelling reactor in a specific ratio, stirring for a certain period, and then adding a certain amount of acid as required for stirring and acidification to prepare the colloid before spray granulation. This intermittent production process has disadvantages such as poor continuity, small throughput, large errors due to manual feeding, high labor intensity, and serious dust pollution. More importantly, it cannot adapt to the large-scale continuous automated production processes of modern factories. Therefore, it is necessary to develop a machine for the continuous and efficient preparation of colloids from powders, colloids, and liquids, realizing the continuous mixing of solid powders with liquids and colloids, and the efficient and rapid preparation of colloids, thereby achieving continuous automated production in this industry.

[0003] Kaolin and boehmite are powdered raw materials for cracking catalysts, containing solid particulate impurities such as lumps of stone, iron blocks, wooden sticks, woven bags, and cloth strips. After removing these impurities, the particle size of these two raw materials is very fine, not exceeding tens of micrometers. The presence of these solid impurities inevitably increases the sorting process, which will increase energy consumption and dust generation, causing secondary dust pollution. If the continuous preparation process of catalyst colloids is directly achieved using crushing and grinding machinery, there is a risk of machine jamming or even damage. Therefore, it is necessary to develop a rapid colloid preparation machine for cracking catalysts that can withstand the presence of solid impurities in the raw materials and is resistant to the impact of solid impurities.

[0004] Patent CN1552801A describes a method for preparing a cracking catalyst using silica sol as a binder. The method involves pre-preparing several desired colloids in a gelling tank, such as one colloid each of silica sol and molecular sieve, and one colloid composed of clay and boehmite. These three colloids are then mixed in a high-speed stirring mixing vessel to obtain the colloid before catalyst drying. While it mentions preparing silica sol according to the method in patent US3957689, in reality, only the preparation of silica sol and the mixing of the colloids are carried out continuously in a localized area within the high-speed stirring mixing vessel; the entire catalyst preparation process is not continuous.

[0005] Patents CN1098130A "A cracking catalyst and its preparation method" and CN1436835A "A catalytic cracking catalyst and its preparation method" describe the preparation formula of cracking catalysts, but do not mention the continuous gelation process.

[0006] Patents CN1580195A "Preparation Method of Cracking Catalyst" and CN1579725A "Preparation Method of Kaolin Colloid" describe a continuous preparation method for cracking catalyst and kaolin colloid. However, these methods are limited to the preparation of kaolin colloid and boehmite colloid and do not involve the continuous mixing process of solid powders (kaolin, boehmite) with liquids (water) and colloids (molecular sieve slurry, alumina sol). Furthermore, they do not describe specific equipment and therefore cannot truly implement a continuous preparation process for catalyst colloids.

[0007] Patents CN110652914A, CN109718725A, and CN109718832A describe a continuous preparation machine and method for cracking catalyst colloids. This technology involves introducing powdered raw materials from the center of the colloid mill, and liquid and colloidal raw materials from the outer wall tube outside the central tube, or through an annular space. The catalyst colloid is rapidly prepared between the interlocking mixing teeth of a rotating and fixed disc within the colloid mill. This technology can achieve efficient and rapid preparation of catalyst colloids from powdered raw materials that do not contain solid impurities (such as lumps of stone, iron blocks, wooden sticks, woven bags, or cloth strips). However, kaolin and boehmite powdered raw materials often contain solid impurities such as lumps of stone, iron blocks, wooden sticks, woven bags, and cloth strips, requiring a screening process to remove these impurities. Otherwise, the colloid mill may jam, or in severe cases, the interlocking mixing teeth may be damaged, causing further damage to the colloid mill.

[0008] In summary, existing technologies do not yet involve a rapid gelling machine for cracking catalyst colloids that can withstand the impact of raw material solids. Summary of the Invention

[0009] The purpose of this disclosure is to provide a rolling mill for making glue, a glue-making system, and a method for making glue. The rolling mill can resist the impact of solid impurities in the raw materials, is free from clogging, and can achieve continuous preparation of colloids. The catalyst prepared from the colloid has superior catalyst strength, wear resistance, activity, and hydrothermal stability.

[0010] To achieve the above objectives, the first aspect of this disclosure provides a rolling adhesive forming machine, which includes a feeding section, a grinding and adhesive forming section, a drive device, and a screw conveyor section;

[0011] The feeding section is provided with a powder inlet, a colloid inlet, and a liquid inlet. The powder inlet, the colloid inlet, and the liquid inlet are located on the upper part of the grinding and adhesive-making section. The grinding and adhesive-making section includes a first grinding rotor (3-0) arranged horizontally along the axial direction and a second grinding rotor arranged horizontally along the axial direction. The first grinding rotor and the second grinding rotor are arranged side by side. The first grinding rotor and the second grinding rotor are pivotally mounted and mesh with each other. The first grinding rotor is connected to the driving device through a rotating shaft. The feed inlet of the screw conveyor is located below the grinding and adhesive-making section for conveying the colloid from the grinding and adhesive-making section out of the grinding and adhesive-making machine.

[0012] Optionally, the first rolling rotor is provided with a plurality of first rolling teeth in the circumferential direction and a plurality of rings of first rolling teeth in the axial direction; the second rolling rotor is provided with a plurality of second rolling teeth in the circumferential direction and a plurality of rings of second rolling teeth in the axial direction.

[0013] The first and second rolling teeth are each independently hemispherical protrusions; adjacent teeth of the first rolling teeth in the same circle have a first recess that matches the hemispherical protrusion of the second rolling teeth, and adjacent teeth of the second rolling teeth in the same circle have a second recess that matches the hemispherical protrusion of the first rolling teeth.

[0014] Optionally, the liquid inlet and the colloid inlet are respectively located on both sides of the powder inlet, and the powder inlet is located at the center above the meshing part of the first and second rolling rotors.

[0015] Optionally, the distance between the first rolling teeth of two adjacent rings on the first rolling rotor is 5-200mm, and the distance between two adjacent teeth of the first rolling teeth in the same ring is 5-200mm.

[0016] The spacing between two adjacent rings of the second rolling teeth on the second rolling rotor is 5-200mm, and the spacing between two adjacent teeth of the second rolling teeth on the same ring is 5-200mm.

[0017] The number of the first crushing teeth on the first crushing rotor is 10-200, preferably 15-180;

[0018] The number of the second rolling teeth on the second rolling rotor is 10-200, preferably 15-180.

[0019] Optionally, the screw conveying section includes an open screw conveying device arranged horizontally along the axial direction. The open screw conveying device includes a screw and a screw blade arranged circumferentially along the screw. The screw blade is provided with a radial opening.

[0020] The number of openings on each of the spiral blades is 1-6, and the total area of ​​the openings accounts for 10-40% of the area of ​​the spiral blade; the length of the screw is 600-3600mm.

[0021] Optionally, the gap between the meshing parts of the first rolling rotor and the second rolling rotor is 0.5-10 mm, preferably 0.5-6 mm.

[0022] Optionally, the length-to-diameter ratio of the first rolling rotor and the second rolling rotor is independently (1.5-20):1, preferably (2-15):1;

[0023] Preferably, the first rolling rotor and the second rolling rotor have the same diameter.

[0024] The second aspect of this disclosure provides a gel-making system for preparing catalyst colloids, the gel-making system comprising the rolling gel-making machine provided in the first aspect of this disclosure.

[0025] The adhesive preparation system also includes a first colloid storage device, a colloid grinding and acidifying machine, and a high-pressure pump;

[0026] Optionally, the outlet of the spiral conveying section of the rolling glue-making machine is in fluid communication with the colloid inlet of the first colloid storage device, the colloid outlet of the first colloid storage device is in fluid communication with the inlet of the colloid grinding and acidifying machine, and the outlet of the colloid grinding and acidifying machine is in fluid communication with the inlet of the high-pressure pump.

[0027] Optionally, the first colloidal storage device includes a cylindrical body, which comprises a cylindrical section and an inverted conical section from top to bottom, and the bottom circumference of the cylindrical section is sealed to the bottom circumference of the conical section.

[0028] An agitator is installed inside the inverted conical section, and the axis of rotation of the agitator is arranged along the axial direction of the inverted conical section. A solid outlet is provided on the side of the cylindrical section. A colloid inlet is provided on the side of the cylindrical section, and the colloid inlet is connected to the discharge port of the screw conveyor. An L-shaped overflow pipe is installed inside the cylindrical section, and the outlet of the L-shaped overflow pipe extends out of the cylindrical section of the cylindrical body to form the colloid outlet.

[0029] Optionally, the L-shaped overflow pipe of the first colloid storage device is also used to control the colloid liquid level in the rolling glue machine, so that the primary colloid liquid level in the rolling glue machine is lower than the axial plane of the first rolling rotor or the second rolling rotor, and not lower than 1 / 3 of the rotor shaft radius of the first rolling rotor or the second rolling rotor.

[0030] Optionally, the glue-making system further includes a second colloid storage device, the inlet of which is in fluid communication with the outlet of the colloid grinding and acidifying machine, and the outlet of which is in fluid communication with the inlet of the high-pressure pump.

[0031] Optionally, the adhesive production system further includes an adhesive circulation pipeline; the adhesive outlet of the first adhesive storage device is in fluid communication with the feed section through the adhesive circulation pipeline; the outlet of the adhesive circulation pipeline reciprocates along the rotation axis of the first or second rolling rotor.

[0032] Optionally, the adhesive preparation system further includes a spray drying device, the inlet of which is in fluid communication with the outlet of the high-pressure pump.

[0033] The third aspect of this disclosure provides a method for making adhesive using the rolling adhesive machine provided in the first aspect of this disclosure. The method includes: introducing powder raw materials and liquid raw materials into the grinding adhesive making section through the powder inlet and the liquid inlet of the feeding section, respectively; mixing them evenly under the rolling and grinding action of the first rolling rotor and the second rolling rotor; and sending the resulting adhesive out of the rolling adhesive machine via the screw conveyor.

[0034] Optionally, the first and second compaction rotors rotate relative to each other at the same speed.

[0035] The rotational speed of the first rolling rotor is 20-600 r / min, preferably 40-400 r / min; the rotational speed of the second rolling rotor is 20-600 r / min, preferably 40-400 r / min.

[0036] Through the above technical solution, the roller-type glue-making machine disclosed herein can resist the impact of solid impurities in the raw materials, without clogging, and can achieve continuous preparation of colloids.

[0037] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0039] Figure 1 This is a schematic diagram of a specific embodiment of the adhesive-making system disclosed herein.

[0040] Figure 2 This is a left view of the roller-type glue-making machine disclosed herein.

[0041] Figure 3 This is a top view of the roller-type glue-making machine disclosed herein.

[0042] Figure 4 This is a cross-sectional view of the roller-type glue-making machine disclosed herein along the axis MM.

[0043] Figure 5 This is a partial structural diagram of the meshing part of the first and second rolling rotors of the rolling type rubber forming machine disclosed herein.

[0044] Explanation of reference numerals in the attached figures

[0045] Detailed Implementation

[0046] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0047] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower parts when the roller-type glue-making machine of this disclosure is in normal operation, and "inner" and "outer" refer to the inner and outer parts when the roller-type glue-making machine of this disclosure is in normal operation.

[0048] like Figure 1 and Figure 2 As shown, the first aspect of this disclosure provides a roller-type glue-making machine, which includes a feeding section, a grinding and glue-making section, a drive device, and a screw conveyor section. The feeding section is provided with a powder inlet, a colloid inlet, and a liquid inlet. The powder inlet and the liquid inlet are located above the grinding and glue-making section. The grinding and glue-making section includes a first roller rotor 3-0 and a second roller rotor 4-0 arranged horizontally along the axial direction. The first roller rotor 3-0 and the second roller rotor 4-0 are arranged side by side and are pivotally mounted and meshed with each other. The first roller rotor is connected to the drive device 5 through a rotating shaft. The inlet of the screw conveyor section is located below the grinding and glue-making section for conveying the colloid from the grinding and glue-making section out of the roller-type glue-making machine.

[0049] The disclosed roller-type glue-making machine has two rollers and a screw conveyor arranged horizontally along the axis. After the rollers fully grind, crush and mix the raw materials, the crushed and mixed materials can automatically fall to the screw conveyor under gravity as the rotors rotate, and are then sent out by the screw conveyor. This reduces material blockage and enables the crushing and mixing of raw materials containing large solid particles, and the materials are quickly sent out of the glue-making machine. This achieves efficient, rapid and continuous preparation of colloids. The catalyst prepared from this colloid has superior catalyst strength, wear resistance, activity and hydrothermal stability.

[0050] To ensure thorough crushing and mixing of the raw materials for forming the adhesive, in one specific embodiment of this disclosure, the first crushing rotor 3-0 is provided with a plurality of first crushing teeth 3-2 circumferentially and multiple rings of first crushing teeth axially; the second crushing rotor 4-0 is provided with a plurality of second crushing teeth 4-2 circumferentially and multiple rings of second crushing teeth axially. This disclosure does not impose specific limitations on the dimensions of the first and second crushing teeth; for example, the maximum height of the crushing teeth can be 5-100 mm. In this embodiment, the raw materials for forming the adhesive can be more thoroughly crushed under the extrusion action of the crushing teeth, achieving rapid adhesive formation from raw materials containing solids.

[0051] This disclosure does not impose specific limitations on the shape of the crushing teeth, as long as they can achieve the crushing and grinding of solid gel-like raw materials. For example, the crushing teeth can be cylindrical, hemispherical, cylindrical at the bottom with a hemispherical tip, or cylindrical at the bottom with an ellipsoidal tip, etc. Figure 4 and Figure 5 As shown, in a specific embodiment of this disclosure, the tips of the first grinding tooth 3-2 and the second grinding tooth 4-2 are each independently hemispherical protrusions; adjacent teeth of the first grinding tooth 3-2 in the same circle have a first recess 3-3 that matches the hemispherical protrusion of the second grinding tooth 4-2, and adjacent teeth of the second grinding tooth 4-2 in the same circle have a second recess 4-3 that matches the hemispherical protrusion of the first grinding tooth 3-2. In the above embodiment, the rubber-forming raw material enters the recess and is crushed under the grinding action of the hemispherical grinding teeth, which can more fully grind and mix the rubber-forming raw material containing solids, and further effectively avoid problems such as clogging of the rubber-forming machine.

[0052] According to this disclosure, the first rolling rotor 3-0 is circumferentially provided with multiple rings of first rolling teeth 3-2, and the second rolling rotor 4-0 is circumferentially provided with multiple rings of second rolling teeth 4-2. According to this disclosure, the distance between the first rolling teeth and the second rolling teeth can vary within a large range. In one specific embodiment of this disclosure, the distance between two adjacent rings of first rolling teeth 3-2 on the first rolling rotor 3-0 is 5-200 mm, and the distance between two adjacent teeth of the same ring of first rolling teeth 3-2 is 5-200 mm; the distance between two adjacent rings of second rolling teeth 4-2 on the second rolling rotor 4-0 is 5-200 mm, and the distance between two adjacent teeth of the same ring of second rolling teeth 4-2 is 5-200 mm; the number of rings of the first rolling teeth on the first rolling rotor is 10-200, preferably 15-180; the number of rings of the second rolling teeth on the second rolling rotor is 10-200, preferably 15-180. In the above embodiments, the number of grinding teeth and the distance between the grinding teeth are appropriate, which can further improve the thoroughness of grinding the raw materials for forming the adhesive.

[0053] like Figure 1 and Figure 2 As shown, in one specific embodiment of this disclosure, the spiral conveying unit includes an open spiral conveying device 7 horizontally arranged along the axial direction. The open spiral conveying device includes a screw and spiral blades 8-1 arranged circumferentially along the screw. The spiral blades are provided with radial openings 8-2. The number of openings 8-2 on each spiral blade is 1-6, and the total area of ​​the openings 8-2 accounts for 10-40% of the area of ​​the spiral blade 8-1. The length of the screw can vary within a wide range, for example, 600-3600 mm, preferably 400-3000 mm. In this disclosure, the spiral blade with openings can be referred to as the open spiral blade body 8-0. In this embodiment, the open spiral conveying device 7 can not only convey the primary colloid from the grinding and colloid-making section, but the open spiral blades can also further stir and break up the primary colloid during the conveying process, resulting in better uniformity and stability of the primary colloid. This disclosure does not impose a specific limitation on the rotation speed of the open spiral conveying device, which can be selected according to actual needs, for example, 20-400 r / min.

[0054] In one specific embodiment of this disclosure, the spiral conveying unit further includes a motor 6, which is connected to the open spiral conveying device via a rotating shaft. The motor 6 transmits power to the rotating shaft, which drives the spiral blades to rotate, thereby conveying the primary colloid from the grinding and colloid-making unit.

[0055] According to this disclosure, the shape of the feeding hopper is not specifically limited. In one specific embodiment of this disclosure, the top surface of the feeding hopper is provided with the powder inlet, the colloid inlet and the liquid inlet, and the bottom surface of the feeding hopper is open and in fluid communication with the grinding and colloid making section.

[0056] According to this disclosure, the gap between the meshing portions of the first and second rolling rotors is 0.5-10 mm, preferably 0.5-6 mm, and more preferably 0.5-3 mm. The circumferential and radial gaps of the meshing portions can be the same or different, such as... Figure 5 As shown, in one specific embodiment, the circumferential clearance δ1 and radial clearance δ2 of the meshing parts are each independently 0.5-10 mm, preferably 0.5-6 mm, and more preferably 0.5-3 mm. In this embodiment, the meshing clearance is appropriately sized, which can fully realize the containment and crushing effect of the raw materials for rubber preparation, and can quickly prepare rubber from raw materials containing solids, resulting in a more uniform and stable colloid.

[0057] According to this disclosure, the rolling-type glue-making machine has a housing 2. This disclosure does not specifically limit the shape of the housing, as long as it can accommodate the feeding section, the grinding and glue-making section, the drive device, and the screw conveyor section. In one embodiment, the housing includes an upper housing, a middle housing, and a lower housing in fluid communication. The upper housing is frustoconical, the middle housing and the lower housing 9 are L-shaped, and the lower housing is used to accommodate the screw conveyor section.

[0058] According to this disclosure, the length-to-diameter ratio of the first and second rolling rotors can vary within a wide range. In one specific embodiment of this disclosure, the length-to-diameter ratio of the first and second rolling rotors is independently (1.5-20):1, preferably (2-15):1. Preferably, the first and second rolling rotors have the same diameter. The surfaces of the first and second rolling rotors are uniformly provided with a first pit 3-3, a second pit 3-4, a first rolling tooth 3-2, and a second rolling tooth 4-2. The rolling teeth and pits are arranged alternately along the generatrix and circumferential direction of the rolling rotors. When the rolling rotors rotate, the rolling tooth (3-3 or 4-3) of one rolling rotor presses into the pit (4-2 or 3-2) of the other rolling rotor. When there are no protrusions or pits on the contact surfaces of the two rolling rotors, their cylindrical surfaces are in contact with each other. This disclosure does not impose a specific limitation on the diameter of the rolling rotors, which can vary within a wide range, for example, from 40 to 1600 mm.

[0059] The second aspect of this disclosure provides a gel-making system for preparing catalyst colloids, the gel-making system comprising the rolling gel-making machine provided in the first aspect of this disclosure.

[0060] like Figure 1 As shown, in one specific embodiment of this disclosure, the adhesive making system further includes a first colloid storage device 10, a colloid grinding and acidifying machine 20-0, and a high-pressure pump 26; the outlet of the spiral conveying section of the rolling adhesive making machine is in fluid communication with the colloid inlet of the first colloid storage device 10, the colloid outlet of the first colloid storage device 10 is in fluid communication with the inlet of the colloid grinding and acidifying machine 20-0, and the outlet of the colloid grinding and acidifying machine 20-0 is in fluid communication with the inlet of the high-pressure pump 26.

[0061] like Figure 1 As shown, in one specific embodiment of this disclosure, the first colloid storage device includes a cylindrical body, which comprises a cylindrical section and an inverted conical section from top to bottom. The bottom circumference of the cylindrical section is sealed to the bottom circumference of the conical section. A stirring paddle 12 is disposed inside the inverted conical section, and the rotating shaft of the stirring paddle is disposed along the axial direction of the inverted conical section. A solid outlet is disposed on the side of the cylindrical body of the inverted conical section. A colloid inlet is disposed on the side of the cylindrical section, and the colloid inlet is connected to the discharge port of the screw conveyor. An L-shaped overflow pipe 11 is disposed inside the cylindrical section, and the outlet of the L-shaped overflow pipe 11 extends out of the cylindrical section of the cylindrical body to form the colloid outlet. In this embodiment, the primary colloid from the grinding and pressing device is fed into the first colloid storage device. The stirring paddle of the first colloid storage device rotates and agitates the primary colloid to make it uniformly mixed. High-density solid impurities in the primary colloid, such as stones and metal blocks, settle to the bottom of the conical section of the first colloid storage device and are periodically discharged from the solid outlet. The primary colloid overflows from the L-shaped overflow pipe. In this disclosure, the first colloid storage device can be a colloid tank with the above-described structure.

[0062] In one specific embodiment, the first colloidal storage device further includes a solid discharge pipe 14. The solid discharge pipe is inclined downward along the tangent of the outer side of the inverted conical section of the cylinder. The angle α between the axis of the solid discharge pipe and the vertical direction is 15-43°. One end of the solid discharge pipe is in fluid communication with the inverted conical section, and the other end of the solid discharge port forms a solid outlet. Preferably, a solid discharge valve 15 is provided on the solid discharge pipe 14. The above embodiment is more conducive to discharging solids from the first storage device.

[0063] According to this disclosure, the glue-making system further includes a stirring motor 13 for controlling the rotation of the stirring paddle 12. In one specific embodiment of this disclosure, the stirring motor 13 is connected to the stirring paddle 12 via a rotating shaft.

[0064] In one specific embodiment of this disclosure, the L-shaped overflow pipe 11 of the first colloid storage device is also used to control the colloid liquid level in the rolling glue machine, so that the primary colloid liquid level in the rolling glue machine is lower than the axial plane of the first rolling rotor or the second rolling rotor, and not lower than 1 / 3 of the rotor shaft radius of the first rolling rotor or the second rolling rotor.

[0065] In one specific embodiment of this disclosure, the adhesive preparation system further includes a second colloid storage device 23, the inlet of which is in fluid communication with the outlet of the colloid grinding and acidifying machine, and the outlet of which is in fluid communication with the inlet of the high-pressure pump. Preferably, the system of this disclosure further includes a colloid delivery pump 25, the inlet of which is in fluid communication with the outlet of the second colloid storage device 23 via a colloid discharge valve 24, and the outlet of which is in fluid communication with the inlet of the high-pressure pump 26.

[0066] In a preferred embodiment of this disclosure, the system further includes a first colloid delivery pipeline and a second colloid delivery pipeline; the inlet of the second colloid delivery pipeline is fluidly connected to the outlet of the colloid milling acidifier, and the outlet of the second colloid delivery pipeline is fluidly connected to the inlet of the second colloid storage device; a second colloid valve 22 is provided on the second colloid delivery pipeline, and the second colloid valve 22 is configured to control the colloid flow rate in the second colloid delivery pipeline; the inlet of the first colloid delivery pipeline is fluidly connected to the outlet of the colloid milling acidifier, and the outlet of the first colloid delivery pipeline is fluidly connected to the inlet of the high-pressure pump 26; a first colloid valve 21 is provided on the first colloid delivery pipeline, and the first colloid valve 21 is configured to control the colloid flow rate in the first colloid delivery pipeline.

[0067] In one specific embodiment of this disclosure, the adhesive-making system further includes an adhesive circulation pipeline 18; the adhesive outlet of the first adhesive storage device 10 is fluidly connected to the feed section through the adhesive circulation pipeline 18; the outlet of the adhesive circulation pipeline 18 reciprocates along the rotation axis of the first grinding rotor 3-0 or the second grinding rotor 4-0. In this embodiment, the adhesive circulation pipeline returns a portion of the primary adhesive to the grinding and adhesive-making section of the grinding-type adhesive-making machine, flushing away the adhesive raw materials adhering to the surfaces of the first grinding rotor 3-0 and the second grinding rotor 4-0, so that the adhered adhesive raw materials quickly dissolve into the adhesive.

[0068] In one specific embodiment of this disclosure, the system further includes a primary colloid reflux valve 17, which is configured to control the flow rate of colloid in the colloid circulation line 18.

[0069] In one specific embodiment, the system further includes a primary colloid delivery pump 16, the inlet of which is in fluid communication with the outlet of the L-shaped overflow pipe 11, and the outlet of the primary colloid delivery pump 16 is in fluid communication with the inlet of the colloid milling acidifier through a primary colloid delivery valve 19. Preferably, the outlet of the primary colloid delivery pump 16 is also in fluid communication with the inlet of the colloid return pipeline.

[0070] In one specific embodiment of this disclosure, the adhesive-making system further includes a spray drying device, the inlet of which is in fluid communication with the outlet of the high-pressure pump 26.

[0071] The third aspect of this disclosure provides a method for making adhesive using the rolling adhesive machine provided in the first aspect of this disclosure. The method includes: introducing powder raw materials and liquid raw materials into the grinding adhesive making section through the powder inlet and the liquid inlet of the feeding section, respectively; mixing them evenly under the rolling and grinding action of the first rolling rotor 3-0 and the second rolling rotor 4-0; and sending the resulting adhesive out of the rolling adhesive machine via the screw conveyor.

[0072] In one specific embodiment of this disclosure, the first rolling rotor 3-0 and the second rolling rotor 4-0 rotate relative to each other at the same speed; the speed of the first rolling rotor 3-0 is 20-600 r / min, preferably 40-400 r / min; the speed of the second rolling rotor 4-0 is 20-600 r / min, preferably 40-400 r / min.

[0073] The present disclosure will be further illustrated by the following examples, but the present disclosure is not limited thereto.

[0074] Example 1

[0075] A continuous preparation experiment of cracking catalyst colloid was conducted using a rolling-type glue-making machine provided in this disclosure. The kaolin raw material contained a certain amount of solid impurity particles, and the pseudoboehmite powder occasionally contained large lumps of impurities.

[0076] The continuous colloid milling machine for the crushing catalyst in this embodiment includes a feeding section, a grinding and colloid milling section, a drive device and a screw conveyor section, with external dimensions of 2400mm (length) × 1600mm (width) × 3500mm (height).

[0077] The feed hopper measures 1800×1600mm, and its top surface is equipped with powder inlet, colloid inlet, and liquid inlet.

[0078] The grinding and forming unit includes a first grinding rotor 3-0 and a second grinding rotor 4-0 arranged horizontally along the axial direction. The first grinding rotor 3-0 and the second grinding rotor 4-0 are arranged side by side. The first grinding rotor 3-0 has multiple first grinding teeth 3-2 arranged circumferentially and multiple rings of first grinding teeth arranged axially. The second grinding rotor 4-0 has multiple second grinding teeth 4-2 arranged circumferentially and multiple rings of second grinding teeth arranged axially. A liquid inlet and a colloid inlet are respectively located on both sides of the powder inlet, and the powder inlet is located at the center above the meshing part of the first grinding rotor 3-0 and the second grinding rotor 4-0. The first rolling rotor 3-0 and the second rolling rotor 4-0 both have a diameter of 660 mm and a length of 1260 mm. The first rolling rotor has 25 rings of first rolling teeth, and the distance between two adjacent rings of first rolling teeth 3-2 is 25.2 mm. Each ring has 20 rolling teeth (hemispherical protrusions) and 20 pits. The second rolling rotor has 25 rings of second rolling teeth, and each ring has 20 rolling teeth (hemispherical protrusions) and 20 pits. The circumferential clearance δ1 of the meshing part of the first rolling rotor and the second rolling rotor is 2.5 mm, and the radial clearance δ2 is 3 mm.

[0079] The screw conveyor section has an open screw conveyor 7 arranged horizontally along the axial direction. The open screw conveyor includes a screw with a length of 2240 mm and 16 spiral blades 8-1 arranged circumferentially along the screw. The total length, including the motor, is 3600 mm. The screw diameter is 180 mm, the screw pitch is 140 mm, and there are four openings 8-2 around the screw, each opening 8-2 being 25 mm wide. The openings extend to the root of the spiral blades, and the total area of ​​the openings 8-2 accounts for 23% of the area of ​​the spiral blades 8-1. Connected to the open screw conveyor 7 is a 1800 mm diameter, 2800 mm high (volume ~4 m³) screw conveyor. 3 The first colloid storage device 10 has an L-shaped overflow pipe 11 with a diameter of 100 mm inside. The horizontal plane of the L-shaped overflow pipe is 200 mm away from the center plane of the double rollers. The solid discharge pipe 14 has a diameter of 150 mm and is connected to the primary colloid conveying pump 16. The conveying pipe is divided into two paths: one is a colloid circulation pipeline 18, which returns part of the primary colloid to the feeding section of the rolling-type glue-making machine; the other path conveys another part of the primary colloid to the grinding and acidifying machine 20-0 with a diameter of 300 mm. The colloid is acidified and ground into catalyst colloid through three stages. The colloid is then discharged into the 10m³ colloid through the second colloid valve 22. 3 In the second colloidal storage device 23, the colloid is discharged into the high-pressure pump 26 through the bottom colloidal discharge valve 24. The colloid is pressurized to 8~10MPa and then enters the spray drying tower to dry and form catalyst particles.

[0080] The first and second grinding rotors rotate at 300 r / min and rotate towards the center; the open screw conveyor rotates at 180 r / min and pushes the colloid towards the inlet of the first colloid storage device; the stirring paddle 12 inside the first colloid storage device rotates at 150 r / min; and the grinding acidifier rotates at 1480 r / min.

[0081] The preparation process is as follows: Kaolin B (containing solid impurities, solid content 72.1%) is fed uniformly at a rate of 933.3 kg / h; boehmite C (occasionally containing large lumps of impurities, solid content 63.4%) is fed uniformly at a rate of 641.3 kg / h; molecular sieve slurry A (solid content 28.5%) is added at a rate of 2017.5 kg / h by a metering pump; and alumina sol D (solid content 21.3%) is added at a rate of 1159 kg / h to the center of the roller-type glue-making machine. The first roller rotor rotates towards its center at 300 r / min. The open screw conveyor rotates at 180 r / min to transport the primary colloid to the first colloid storage device. The primary colloid E is discharged through an L-shaped overflow pipe and a primary colloid conveying pump. The conveying rate of the colloid is 11.7 m³. 3 / h, of which 7.8m 3 The flow rate of / h is returned to the rolling mill, 3.9m 3 The colloid is fed into a grinding and acidifying mill at a speed of 1480 r / min. 36% hydrochloric acid G is added to the mill at a rate of 48.3 kg / h through the inlet pipe. The resulting colloid is then transferred to a second colloid storage device. The catalyst colloid H is then transported to a high-pressure pump and subsequently to a spray dryer to be dried into catalyst particles. After the experiment, solid impurities F (particles of varying sizes) in the first colloid storage device 10 are discharged from the solid discharge pipe 14 through the solid discharge valve 15. After cleaning the colloid from the surface of the solid impurities, they are dried at 250°C for 1 hour and then weighed.

[0082] In this experiment, a total of 4806 kg of colloid was prepared in 1 hour, with a solid content of 40.3%. The entire process was continuous, and 1.82 kg of solid impurities were collected. The particle size of the colloid did not exceed 13.5 μm, with a median particle size of 5.8 μm. The energy consumption for colloid preparation was 65 kWh. After spray drying, 2257 kg of catalyst (with a water content of 14.2%) was obtained. Analysis showed that the catalyst attrition index was 0.92%, the micro-reaction activity after 4 hours of steam aging was 82%, and the hydrothermal stability after 17 hours of steam aging was 64%. Detailed results are shown in Table 1.

[0083] The entire preparation process is continuous, without any material blockage or solid impurities causing blockage.

[0084] Comparative Example 1

[0085] Using traditional 10m3 The cracking catalyst colloid was prepared in a stirred tank reactor. 948.2 kg of kaolin, 651.6 kg of boehmite, 2049.8 kg of molecular sieve slurry, and 1177.5 kg of alumina sol from Example 1 were added to the reactor. After 3 hours of stirring, 48.3 kg of 36% hydrochloric acid was added, followed by 333.3 kg of water (to prevent high colloid viscosity and difficulty in dispersion). After another 1 hour of stirring, 5160 kg of carrier colloid was prepared, with a solid content of 37.6%. The entire process was intermittent. 2.63 kg of solid impurities were collected in a filter. The colloid particle size distribution was 3–300 μm, with a median particle size of 10.5 μm. The energy consumption for colloid preparation was 143 kWh. A total of 2264 kg of catalyst (14.3% water content) was prepared. The catalyst attrition index was 2.6%, the micro-reaction activity after 4 hours of steam aging was 79%, and the hydrothermal stability after 17 hours of steam aging was 60%. Detailed results are shown in Table 1.

[0086] The entire preparation process is carried out intermittently. If local blockage or solid impurities occur, they are cleaned up in time without affecting the operation of the system.

[0087] Example 2

[0088] The roller-type glue-making machine shown in Example 1 is used, with the only difference being that kaolin B (containing solid impurities, solid content 72.1%) is fed uniformly at a rate of 1236.6 kg / h, boehmite C (occasionally containing large lumps of impurities, solid content 63.4%) is fed uniformly at a rate of 801.6 kg / h, molecular sieve slurry A (solid content 28.5%) is added at a rate of 2673.2 kg / h by a metering pump, and alumina sol D (solid content 21.3%) is added at a rate of 1535.7 kg / h to the center of the roller-type glue-making machine. The glue-making machine rotates towards its center at 300 r / min, and the open screw conveyor rotates at 180 r / min, conveying the primary colloid to the first colloid storage device. The primary colloid is then discharged through an L-shaped overflow pipe and a primary colloid conveying pump, with a conveying volume of 15.5 m³. 3 / h, of which 10.33m 3 The flow rate of / h is returned to the rolling mill, 5.17m 3 The colloid is fed into a colloid grinding and acidifying machine at a speed of 1480 r / min. 36% hydrochloric acid G is added into the grinding and acidifying machine from the inlet pipe at a rate of 48.3 kg / h. The prepared colloid is then transported to the second colloid storage device and then to a high-pressure pump to dry it into catalyst particles. After the test is completed, the solid impurities in the first colloid storage device 10 are discharged from the solid discharge pipe 14 through the solid discharge valve 15. The surface of the solid impurities is cleaned of colloid, dried at 250°C for 1 hour, and then weighed.

[0089] In this experiment, a total of 6362 kg of colloid was prepared in 1 hour, with a solid content of 40.2%. The entire process was continuous, and a total of 2.03 kg of solid impurities were collected. The particle size of the colloid did not exceed 14.2 μm, with a median particle size of 6.2 μm. The energy consumption for colloid preparation was 85 kWh. After spray drying, 2986 kg of catalyst (with a water content of 14.2%) was obtained. Analysis showed that the catalyst attrition index was 0.96%, the micro-reaction activity after 4 hours of steam aging was 81%, and the hydrothermal stability after 17 hours of steam aging was 63%. Detailed results are shown in Table 1.

[0090] The entire preparation process is continuous, without any material blockage or solid impurities causing blockage.

[0091] Comparative Example 2

[0092] The continuous preparation experiment of colloids was conducted using the method of Example 1 in Patent 201810697781.2, according to its appendix. Figure 5 The process for preparing colloidal catalysts for catalytic cracking is shown.

[0093] As it Figure 5 As shown, kaolin powder and boehmite powder are transported to the storage tank. Kaolin is conveyed to the screw crusher at a rate of 1111.6 kg / h via belt scale; boehmite is conveyed to the screw crusher at a rate of 714.6 kg / h via belt scale. The screw crusher conveys kaolin and boehmite powders at 50 r / min to the powder inlet of the continuous glue-making machine. Molecular sieve slurry is conveyed to the continuous glue-making machine at a rate of 3064.8 kg / h via liquid feed pipe by metering pump. Aluminum sol is conveyed to the glue-making machine at a rate of 1469 kg / h via colloid feed pipe. The powder and colloid are rapidly prepared into a primary colloid by the continuous glue-making machine, and then mixed with 36% hydrochloric acid via liquid acid feed pipe at a rate of 42.6 kg / h. The catalyst is continuously fed into a continuous gelling machine, where it is then continuously ground and acidified by several stages of mixing discs to form a catalyst spray colloid. The colloid is discharged from the outlet and directly transported to a high-pressure pump via pipeline. After spray drying, 2975 kg of the finished catalyst is obtained, taking approximately 1.5 hours (including start-up and shutdown cleaning time; the actual gelling time is approximately 1 hour). The colloid analysis shows a solid content of 40.1%, and it is estimated that 6358 kg of catalyst colloid was prepared. The results of catalyst strength, activity, and stability analysis are shown in Table 1.

[0094] The entire preparation process was interrupted twice because large solid lumps (stones) stuck in the mixing teeth of the glue-making machine, causing the machine to stop operating. The lumps were 48mm×39mm×36mm and 51mm×33mm×29mm in size. The machine needed to be stopped for cleaning, which took about 30 minutes in total.

[0095] Table 1. Analysis results of examples and comparative examples.

[0096]

[0097] Note: *The analysis method for catalyst attrition index is found in RIPP 29-90 (Analytical Methods for Petrochemical Processes (RIPP Test Methods) (Yang Cuiding et al., Science Press, 1990)).

[0098] **The method for analyzing the solid content of the prepared catalyst is described in RIPP 29-90 (Analytical Methods for Petrochemical Processes (RIPP Test Methods) (Yang Cuiding et al., Science Press, 1990)).

[0099] ***The analytical methods for the microreactor activity and hydrothermal stability of the catalyst are described in RIPP 92-90 (Analytical Methods for Petrochemical Processes (RIPP Test Methods) (Yang Cuiding et al., Science Press, 1990)).

[0100] As shown in Table 1, the catalyst colloid preparation efficiency of Example 1 is approximately 5 times that of Comparative Example 1. The catalyst prepared by Example 1 has a wear index 1.78 percentage points lower, and its activity is basically the same. Its 17-hour hydrothermal stability is 4 percentage points higher than that of Comparative Example 1. The catalyst colloid preparation efficiency of Example 2 is 1.5 times that of Comparative Example 2. The catalysts prepared by both methods have comparable wear indices, catalyst activity, and 17-hour hydrothermal stability. Examples 1, 2, and Comparative Example 2 all use continuous colloid preparation methods, while Comparative Example 1 uses intermittent colloid preparation methods. This demonstrates that continuous colloid preparation is more efficient, and the resulting catalyst has higher strength, activity, and 17-hour hydrothermal stability than intermittent methods. When the powder raw material contains large solid particles, it can easily cause jamming of the colloid preparation machine, affecting its efficiency and continuity. The method disclosed in this paper can effectively avoid the jamming phenomenon caused by powder raw materials containing large solid particles during colloid preparation, resulting in high colloid preparation efficiency and superior physicochemical properties of the prepared colloid.

[0101] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0102] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0103] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A gel-making system for preparing catalyst colloids, the gel-making system comprising a grinding gel-making machine, the grinding gel-making machine comprising a feeding section, a grinding gel-making section, a driving device, and a screw conveyor section; The feeding section is provided with a powder inlet, a colloid inlet, and a liquid inlet. The powder inlet, the colloid inlet, and the liquid inlet are located on the upper part of the grinding and gluing section. The grinding and gluing section includes a first grinding rotor (3-0) and a second grinding rotor (4-0) arranged horizontally along the axial direction. The first grinding rotor (3-0) and the second grinding rotor (4-0) are arranged side by side. The first grinding rotor and the second grinding rotor are pivotally mounted and mesh with each other. The first grinding rotor is connected to the driving device (5) through a rotating shaft. The feed inlet of the screw conveyor is located below the grinding and gluing section for conveying the colloid from the grinding and gluing section out of the grinding and gluing machine. The glue-making system further includes a first colloid storage device (10), a colloid grinding and acidifying machine (20-0), and a high-pressure pump (26); the outlet of the spiral conveying part of the rolling glue-making machine is fluidly connected to the colloid inlet of the first colloid storage device (10), the colloid outlet of the first colloid storage device (10) is fluidly connected to the inlet of the colloid grinding and acidifying machine (20-0), and the outlet of the colloid grinding and acidifying machine (20-0) is fluidly connected to the inlet of the high-pressure pump (26); The first colloidal storage device includes a cylindrical body, which comprises a cylindrical section and an inverted conical section from top to bottom, and the bottom circumference of the cylindrical section is sealed to the bottom circumference of the conical section. A stirring paddle (12) is provided inside the inverted conical section, and the rotating shaft of the stirring paddle is arranged along the axial direction of the inverted conical section; a solid outlet is provided on the side cylindrical body of the inverted conical section; a colloid inlet is provided on the side of the cylindrical section, and the colloid inlet is connected to the discharge port of the screw conveyor; an L-shaped overflow pipe (11) is provided inside the cylindrical section, and the outlet of the L-shaped overflow pipe (11) extends out of the cylindrical section of the cylindrical body to form the colloid outlet; The L-shaped overflow pipe (11) of the first colloid storage device is also used to control the colloid liquid level in the rolling glue machine, so that the primary colloid liquid level in the rolling glue machine is lower than the axial plane of the first rolling rotor or the second rolling rotor, and not lower than 1 / 3 of the rotor shaft radius of the first rolling rotor or the second rolling rotor. The glue-making system also includes a glue circulation pipeline (18); the glue outlet of the first glue storage device (10) is in fluid communication with the feed section through the glue circulation pipeline (18); the outlet of the glue circulation pipeline (18) reciprocates along the rotation axis of the first rolling rotor (3-0) or the second rolling rotor (4-0).

2. The adhesive-making system according to claim 1, wherein, The first rolling rotor (3-0) has a plurality of first rolling teeth (3-2) arranged circumferentially and a plurality of rings of first rolling teeth arranged axially; the second rolling rotor (4-0) has a plurality of second rolling teeth (4-2) arranged circumferentially and a plurality of rings of second rolling teeth arranged axially. The tips of the first rolling teeth (3-2) and the second rolling teeth (4-2) are each independently hemispherical protrusions; the adjacent teeth of the first rolling teeth (3-2) in the same circle have a first pit (3-3) that matches the hemispherical protrusion of the second rolling teeth (4-2), and the adjacent teeth of the second rolling teeth (4-2) in the same circle have a second pit (4-3) that matches the hemispherical protrusion of the first rolling teeth (3-2).

3. The adhesive-making system according to claim 1, wherein, The liquid inlet and the colloid inlet are respectively located on both sides of the powder inlet, and the powder inlet is located at the center above the meshing part of the first rolling rotor (3-0) and the second rolling rotor (4-0).

4. The adhesive-making system according to claim 1, wherein, The spacing between the first rolling teeth (3-2) of two adjacent rings on the first rolling rotor (3-0) is 5-200mm, and the spacing between two adjacent teeth of the first rolling teeth (3-2) in the same ring is 5-200mm. The spacing between the second rolling teeth (4-2) on two adjacent rings of the second rolling rotor (4-0) is 5-200mm, and the spacing between two adjacent teeth of the second rolling teeth (4-2) on the same ring is 5-200mm; The number of the first crushing teeth on the first crushing rotor is 10-200; The number of rotations of the second rolling teeth on the second rolling rotor is 10-200.

5. The adhesive-making system according to claim 4, wherein, The number of the first crushing teeth on the first crushing rotor is 15-180. The number of rotations of the second rolling teeth on the second rolling rotor is 15-180.

6. The adhesive-making system according to claim 1, wherein, The spiral conveying unit includes an open spiral conveying device (7) arranged horizontally along the axial direction. The open spiral conveying device includes a screw and spiral blades (8-1) arranged circumferentially along the screw. The spiral blades are provided with radial openings (8-2). The number of openings (8-2) on each of the spiral blades is 1-6, and the total area of ​​the openings (8-2) accounts for 10-40% of the area of ​​the spiral blade (8-1); the length of the screw is 600-3600mm.

7. The adhesive-making system according to claim 1, wherein, The gap between the meshing parts of the first rolling rotor and the second rolling rotor is 0.5-10mm.

8. The adhesive-making system according to claim 7, wherein, The gap between the meshing parts of the first and second rolling rotors is 0.5-6mm.

9. The adhesive-making system according to claim 1, wherein, The length-to-diameter ratio of the first rolling rotor and the second rolling rotor is independently (1.5-20):

1.

10. The adhesive-making system according to claim 9, wherein, The length-to-diameter ratio of the first rolling rotor and the second rolling rotor is independently (2-15):

1.

11. The adhesive-making system according to claim 9, wherein, The first and second rolling rotors have the same diameter.

12. The adhesive-making system according to claim 1, wherein, The glue-making system also includes a second colloid storage device (23), the inlet of which is in fluid communication with the outlet of the colloid grinding and acidifying machine, and the outlet of which is in fluid communication with the inlet of the high-pressure pump.

13. The adhesive-making system according to claim 1, wherein, The adhesive making system also includes a spray drying device, the inlet of which is in fluid communication with the outlet of the high-pressure pump (26).

14. A method for preparing adhesive using the adhesive preparation system according to any one of claims 1-13, the method comprising: Powder and liquid raw materials are introduced into the grinding and gluing section through the powder inlet and liquid inlet of the feeding section, respectively. They are mixed evenly under the grinding action of the first grinding rotor (3-0) and the second grinding rotor (4-0), and the resulting colloid is sent out of the grinding and gluing machine via the screw conveyor.

15. The method according to claim 14, wherein, The first rolling rotor (3-0) and the second rolling rotor (4-0) rotate relative to each other at the same speed. The first rolling rotor (3-0) has a rotational speed of 20-600 r / min; the second rolling rotor (4-0) has a rotational speed of 20-600 r / min.

16. The method according to claim 15, wherein, The first rolling rotor (3-0) has a rotational speed of 40-400 r / min; the second rolling rotor (4-0) has a rotational speed of 40-400 r / min.

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