CN110652914A

CN110652914A - Continuous glue making method and continuous preparation method of catalytic cracking catalyst colloid

Info

Publication number: CN110652914A
Application number: CN201810697781.2A
Authority: CN
Inventors: 田志鸿; 李学锋; 何金龙; 刘亚林; 张翊
Original assignee: Sinopec Research Institute of Petroleum Processing; China Petrochemical Corp
Current assignee: Sinopec Research Institute of Petroleum Processing; China Petrochemical Corp
Priority date: 2018-06-29
Filing date: 2018-06-29
Publication date: 2020-01-07

Abstract

A continuous glue-making method and a preparation method of catalytic cracking catalyst colloid are characterized in that a continuous glue-making machine is adopted, a powdery raw material is metered and conveyed into a raw material feed inlet of the continuous glue-making machine, a liquid raw material is conveyed into the raw material feed inlet by a metering pump, a motor drives a rotating shaft and a rotating disc to rotate at a high speed, the raw material is mixed in a mixing space of a first-stage mixing disc in a glue-making chamber to prepare colloid, the colloid crosses the outer edge of the first-stage rotating disc and is collected with added liquid acid into the mixing space of a second-stage mixing disc to be continuously mixed, ground and further mixed by the mixing discs of the later stages, and the colloid product prepared from the powdery raw material and the. According to the continuous glue preparation method provided by the invention, solid powder, liquid and colloid are continuously mixed to form glue, acidification can be simultaneously carried out in the process of preparing the catalytic cracking catalyst colloid, the continuous automatic preparation process of the colloid is realized, the colloid with fine granularity and good uniformity is prepared, the preparation efficiency is improved, and the glue preparation time is shortened.

Description

Continuous glue making method and continuous preparation method of catalytic cracking catalyst colloid

Technical Field

The invention relates to a method for continuously preparing colloid from solid powder, liquid and colloid, in particular to a method for continuously preparing, acidifying and grinding colloid of a cracking catalyst.

Background

In industrial production such as chemical industry, processes such as mixing, mulling and humidifying one or more solid powder materials with one or more liquid and colloid materials are frequently encountered, and the processes are basically completed by intermittent stirring. For example, in the colloid preparation process of cracking catalyst, the raw materials (such as water, alumina sol, molecular sieve slurry) for preparing catalyst colloid and the powder raw materials (kaolin and pseudoboehmite) are respectively weighed according to the proportion, and are put into a colloid forming kettle at one time, stirred for a certain time, added with a certain amount of acid according to requirements, stirred and acidified to prepare the colloid before spray granulation. The intermittent production process has the defects of poor continuity, small treatment capacity, large error of manual feeding, high labor intensity, serious field dust emission and the like, and more importantly, the intermittent production process cannot adapt to the large-scale continuous automatic production process of a modern factory, so that the continuous and efficient colloid preparing equipment for continuously and efficiently preparing the powder, the colloid and the liquid is needed to be developed, the processes of continuously mixing the solid powder, the liquid and the colloid, kneading, humidifying, preparing the colloid and the like are realized, and the continuous automatic production process of the industry is realized.

CN1552801A describes a method for preparing a cracking catalyst with a silica sol binder, which relates to a method for preparing several strands of colloid in advance in a colloid forming tank, such as one strand of silica sol, one strand of molecular sieve, clay, and three strands of pseudo-boehmite colloid, and then mixing the several strands of colloid in a rapid stirring and mixing kettle to obtain the colloid before drying the catalyst. It is mentioned that the preparation of silica sol is carried out according to the method of patent US3957689, but in fact only the silica sol preparation and the mixing of several strands of colloid are carried out locally in a rapid mixing kettle continuously, without realizing a continuous preparation process of the whole catalyst.

CN1098130A 'a cracking catalyst and a preparation method thereof', CN1436835A 'a catalytic cracking catalyst and a preparation method thereof', etc. all describe the preparation formula of the cracking catalyst, and do not mention the continuous gel forming process.

CN1580195A, "cracking catalyst preparation method", and CN1579725A "kaolin colloid preparation method" describe a continuous preparation method of a cracking catalyst and a kaolin colloid, which is limited to the preparation methods of the kaolin colloid and the pseudo-boehmite colloid, and do not relate to a continuous mixing process of solid powder (kaolin, pseudo-boehmite) and liquid (water) and colloid (molecular sieve slurry, alumina sol), and no specific equipment is described, so that the continuous preparation process of the catalyst colloid cannot be really implemented.

In summary, the prior art does not relate to a device for continuously and efficiently preparing colloid from powder, liquid and colloid, and continuously acidifying and continuously grinding the colloid, and a method for continuously and efficiently preparing the colloid of the cracking catalyst by using the device. Therefore, the device for continuously preparing the catalyst colloid from the powder, the liquid and the colloid and continuously acidifying and continuously grinding the colloid and the corresponding method for continuously and efficiently preparing the cracking catalyst colloid are provided.

Disclosure of Invention

The invention aims to provide an efficient continuous glue making method.

The second technical problem to be solved by the invention is to provide a continuous preparation method of catalytic cracking catalyst colloid.

The invention provides a continuous glue making method, which adopts a continuous glue making machine consisting of an outer shell 1, a cover plate 2, at least one raw material feeding hole, a discharging hole 5, at least two stages of mixing discs and a transmission device 12;

the cover plate 2 is positioned at the upper part of the outer shell 1 and is movably connected with the outer shell, and a space enclosed by the cover plate 2 and the outer shell 1 is a glue making chamber;

the raw material feed inlet is arranged at the upper part of the cover plate 2 and communicated with the glue making chamber;

the lower surface of the cover plate 2 and the first-stage rotating disk 6 form a first-stage mixing disk, the lower part of the first-stage mixing disk is at least provided with a second-stage fixed disk 7 and a second-stage rotating disk 8 to form a second-stage mixing disk, and a plurality of rings of meshed mixing teeth are distributed on the matching surface of the fixed disk and the rotating disk in each stage of mixing disk;

a discharge port 5 is arranged at the lower part of the outer shell 1;

the rotating disks of all stages are respectively fixed on a rotating shaft 10 and are connected with a transmission device 12 below the outer shell 1 through the rotating shaft 10, and the rotating shaft and the rotating disks are driven to rotate by a motor through the transmission device in the using process;

the powder raw materials are conveyed into the raw material feeding hole through metering, the liquid raw materials are conveyed into the raw material feeding hole through the metering pump, the motor drives the rotating shaft and the rotating disc to rotate at a high speed, the raw materials are mixed in the mixing space of the first-stage mixing disc in the glue making chamber to prepare a colloid, the colloid is continuously mixed and ground in the mixing space of the second-stage mixing disc after passing through the outer edge of the first-stage rotating disc, the colloid is further mixed and ground through the mixing discs at each stage, and the prepared colloid product is discharged from the discharging hole.

The preparation method of the catalytic cracking catalyst colloid provided by the invention adopts the continuous gel preparation method, wherein a liquid acid feeding pipe 9 is arranged between the first-stage mixing disc and the second-stage mixing disc, and one end of the liquid acid feeding pipe 9 extends out of the outer shell 2; the powder raw material is a mixture of kaolin and pseudo-boehmite, and the liquid raw material is a mixture of molecular sieve slurry and alumina sol; the colloid prepared by grinding the first-stage mixing disc is converged into the central hole space of the second-stage mixing disc through the outer edge of the first-stage rotating disc, meanwhile, liquid acid is added into the central hole space through a liquid acid feeding pipe, and the liquid acid and the colloid are mixed and ground through the mixing discs of the later stages to prepare the catalytic cracking catalyst colloid product.

The catalytic cracking catalyst colloid prepared by the preparation method of the catalytic cracking catalyst colloid provided by the invention can be prepared into a catalytic cracking catalyst product after spray drying.

The continuous gel preparation method and the catalytic cracking catalyst gel preparation method provided by the invention have the beneficial effects that:

according to the continuous glue preparation method provided by the invention, solid powder, liquid and colloid are continuously mixed to form glue, acidification can be simultaneously carried out in the process of preparing the catalytic cracking catalyst colloid, and the continuous automatic preparation process of the colloid is realized, so that the preparation efficiency is greatly improved, and the glue preparation time is shortened.

The preparation method of the catalytic cracking catalyst colloid provided by the invention can prepare the catalytic cracking catalyst colloid with fine and uniform granularity and good strength, activity and stability due to the high-speed shearing force and strong centrifugal force provided by the mixed tooth occlusion space between the rotating disk and the fixed disk of the high-efficiency continuous glue making, acidifying and grinding glue making machine.

The preparation method of the catalytic cracking catalyst colloid provided by the invention adopts a continuous production mode, so that the process links of the existing production and related intermediate equipment such as an intermediate reaction tank, a delivery pump and a stirrer are reduced, the equipment investment and maintenance cost are saved, the energy consumption is reduced, and the preparation method has obvious economic benefits.

Description of the drawings:

FIG. 1 is a sectional elevation view of a continuous glue maker used in the continuous glue making process of the present invention;

FIG. 2 is a cross-sectional view of the intermeshing engagement of a first embodiment of a mixing disk of a continuous gum making machine;

FIG. 3 is a cross-sectional view of a second embodiment of the mixing disk of the continuous beam former showing intermeshing;

FIG. 4 is a cross-sectional view of a liquid acid addition pipe in the catalytic cracking catalyst colloid preparation method provided in the present invention;

FIG. 5 is a flow chart of a method for preparing catalytic cracking catalyst colloid according to the present invention.

Wherein:

1-an outer shell, 2-a cover plate, 3-a feed inlet, 4-a powder feed inlet, 5-a discharge outlet, 6-a first-stage rotating disc, 7-a second-stage fixed disc, 8-a second-stage rotating disc, 9-a liquid acid feed pipe, 10-a rotating shaft, 11-a material driving component, 12-a bearing system, 13-a belt pulley, 14-a transmission belt, 15-a spiral strip crusher/a powder cache hopper, 16, 17-a powder metering scale, 18, 19-a powder storage tank, 21-a first-stage fixed disc mixing tooth, 22-a colloid cache tank, 23-a colloid delivery pump, 24-a colloid high-pressure pump, 25-a colloid delivery pipe, 26-a two-way switching valve, 31, 32-a liquid/colloid feed pipe, 71-a second-stage rear fixed disc mixing tooth, 81-second stage rear rotating disc mixing teeth, 91-liquid acid feed pipe circular pipe, 92-liquid acid feed pipe nozzle.

Detailed Description

The following detailed description of the embodiments of the invention:

the term "top" as used in this specification means 0-5% of the container from top to bottom; the reference to "upper" means 0-50% of the object from top to bottom, and the reference to "lower" means 50% -100% of the object from top to bottom.

A continuous glue making method adopts a continuous glue making machine which consists of an outer shell 1, a cover plate 2, at least one raw material inlet, a material outlet 5, at least two stages of mixing discs and a transmission device 12;

a discharge port 5 is arranged on the outer shell 1 at the bottom of the glue making chamber;

the rotating disks at all levels are respectively connected with a rotating shaft 10 and a motor at the lower part of the outer shell 2 through the rotating shaft 10, and the rotating shaft and the rotating disks are driven to rotate by the power provided by the motor through transmission;

the powder raw materials are conveyed into the raw material feeding port through metering, the liquid raw materials are conveyed into the raw material feeding port through the metering pump, the motor drives the rotating shaft and the rotating disc to rotate at a high speed, the raw materials are mixed in a mixing space of a first-stage mixing disc in the glue making chamber to prepare a colloid, the colloid passes through the outer edge of the first-stage rotating disc and is collected in a mixing space of a second-stage mixing disc to be continuously mixed and ground, the colloid is further mixed and ground through the mixing discs of each stage, and the powder raw materials and the liquid raw materials are prepared into a.

Preferably, a liquid acid feeding pipe 9 is arranged between the first-stage mixing disc and the second-stage mixing disc, and one end of the liquid acid feeding pipe 9 extends out of the outer shell (2); the colloid prepared by grinding the first-stage mixing disc is converged into the central hole space of the second-stage mixing disc through the outer edge of the first-stage rotating disc, meanwhile, the liquid acid raw material is added into the central hole space through the liquid acid feeding pipe 9, and is mixed with the colloid and then is mixed and ground in the next stages to prepare a colloid product.

Preferably, the outlet of the liquid acid feeding pipe is an annular pipe with nozzles arranged around the rotating shaft, and the number of the nozzles is not limited and is required to be symmetrically and uniformly distributed by taking the rotating shaft as the center.

In the continuous glue making method provided by the invention, the continuous glue making machine adopts an optimal structure, the raw material feeding port is composed of a powder feeding port 4 and a liquid/colloid feeding port 3, the powder feeding port is arranged at the geometric center of the cover plate 2, and the liquid/colloid feeding ports 3 are symmetrically arranged at two sides of the powder feeding port; the powder raw materials are conveyed to a powder feeding hole to be added through metering, the liquid raw materials are conveyed to a liquid/colloid feeding hole to be added through metering, and the liquid raw materials are mixed in the center of a first-stage mixing disc. And the powder metering, feeder, split storage tank and other equipment are arranged in a matching way.

More preferably, the liquid/colloid feed port is arranged to be an annular space surrounding the powder feed port, and the annular liquid or colloid feed port is communicated with an external liquid or colloid feed pipe. Liquid and colloid in the liquid raw material are preferably fed respectively, introduced into an annular space of a liquid/colloid feed port and enter an inner space of the glue making machine.

In the continuous glue making method provided by the invention, the material driving component is preferably arranged on the back surface of the last-stage rotating disc, the material driving component is of a sheet structure, and the bottom of the material driving component is attached to the bottom of the outer shell. The colloid product prepared by grinding and mixing the materials by the multistage mixing disc is discharged from the discharge port by the material driving component on the back of the last stage of rotating disc.

In the continuous glue making machine adopted by the method, the powder feeding port is provided with an opening on the cover plate and is communicated with the center of the first-stage mixing disc, the outer wall of the cover plate is fixed on the outer shell, the lower surface of the cover plate is used as a fixed disc and is combined with the first-stage rotating disc into the first-stage mixing disc, the center of the rotating disc is arranged on the rotating shaft, the edge of the excircle is provided with a gap with the inner wall of the outer shell, a multi-stage fixed disc and a multi-stage rotating disc can be arranged below the first-stage mixing disc to form the multi-stage mixing disc.

In the continuous glue making method provided by the invention, in the continuous glue making machine, preferably, the number of the mixing discs is 3-8, each mixing disc is composed of a fixed disc and a rotating disc which are matched with each other, a plurality of circles of mixing teeth are alternately arranged on the matching surface of the fixed disc and the rotating disc from the central axis to the outside in a concentric circle mode, the fixed disc of each stage is fixed on the outer shell 1, and the rotating disc of each stage is fixed on the rotating shaft 10.

In the continuous glue making method provided by the invention, in the continuous glue making machine, preferably, 2-5 circles of mixing teeth, more preferably 2-4 circles are arranged on the matching surface of the first-stage mixing disc and the rotating disc; wherein the distance between two adjacent radial mixing teeth is 5-40 mm, and more preferably 5-20 mm; the interval of the adjacent mixed teeth in the same circle in the circumferential direction is 3-20 mm, more preferably 5-20 mm, and the length of the circumferential arc line at the center of the adjacent mixed teeth in the same circle is 5-35 mm, more preferably 7-25 mm.

The occlusion mode of the mixing teeth of each stage of mixing disc is as follows: the mixing teeth at the innermost circle must be the mixing teeth of the rotating disc, and the mixing teeth at the outermost circle can be the mixing teeth of the fixed disc or the mixing teeth of the rotating disc.

The shapes of the rotating disc mixing teeth and the fixed disc mixing teeth can be circular, polygonal, symmetrical fan-shaped or asymmetrical fan-shaped structures, and the shapes of the mixing teeth among all stages of mixing discs can be the same or different, and are not limited herein.

In the continuous glue-making method provided by the invention, in the continuous glue-making machine, preferably, along with the increase of the number of the mixing disk stages, compared with the previous mixing disk, the number of turns of the mixing teeth on the next mixing disk in the radial direction is increased, the distance between the adjacent mixing teeth on the next mixing disk in the radial direction is reduced, the distance between the adjacent mixing teeth on the next mixing disk in the circumferential direction is reduced, and the length of the circumferential arc line of the center of the adjacent mixing teeth in the circumferential direction is reduced.

2-12 circles of mixing teeth are arranged on the matching surface of the second-stage and later mixing disc and the rotating disc, and preferably 2-6 circles; wherein the distance between adjacent mixing teeth in the circumferential direction is 0.2-20 mm, preferably 0.5-12 mm, and the length of a circumferential arc line at the center of the adjacent mixing teeth in the same circle is 2-35 mm, preferably 3-25 mm.

Preferably, when the mixing teeth are of a partial fan-shaped structure, a back inclination angle alpha is formed by a groove included angle between two adjacent mixing teeth along the circumference on the rotating disc, a circumferential normal line of the position where the groove is located and the rotating direction, and the back inclination angle alpha ranges from 0.5 degrees to 40 degrees; an included angle of a groove between two adjacent mixing teeth along the circumference on the fixed disc, a circumferential normal line of the position where the included angle is located and a rotating direction form a forward inclination angle beta, and the range of the forward inclination angle beta is 0.5-40 degrees, and more preferably 1-35 degrees.

Preferably, the number of the material driving components is 2-4; the direction of a discharge pipe of a lower cone of the shell is tangent to the circumferential surface of the shell, the direction of an outlet of the discharge pipe is consistent with the direction of a streamline of colloid in the grinding machine, and the discharge pipe is inclined downwards by about 20-40 degrees.

In the continuous glue making method provided by the invention, in the adopted continuous glue making machine, a discharge pipe communicated with a discharge hole is arranged on the side surface of the outer shell, the axis of the discharge pipe inclines downwards about 20-40 degrees with the horizontal plane, and the projection on the horizontal plane is tangent to the circumferential surface of the outer shell.

In the continuous glue making method provided by the invention, in order to realize quick glue making, acidification and grinding of raw materials including powder, colloid and liquid, the continuous accurate metering and stable conveying equipment of each solid raw material, liquid raw material and colloid raw material is matched with the continuous accurate metering and stable conveying equipment, and the continuous glue making process can be realized by controlling the proportion of each raw material according to requirements.

The invention provides a continuous glue making method, in the working process, the powder raw material, colloid and liquid raw material are continuously accurately metered on line and stably conveyed to a powder feeding port and a liquid/colloid feeding port of a continuous glue making machine according to requirements, a motor drives each stage of rotating disc to rapidly rotate through a rotating shaft, the powder raw material, the colloid and the liquid fall onto a first stage rotating disc, a mixing tooth of the rotating disc rotates around an axis at a high speed to form high-speed shearing force and strong centrifugal force with an occlusion space of a mixing tooth of a fixed disc, the raw material mixture is rapidly prepared into the colloid through the first stage mixing disc, the colloid enters the upper surface of a second stage fixed disc through a gap between the outer edge of the rotating disc and a shell and is collected in a central hole space of the disc, and meanwhile, liquid acid is continuously added into a space near the central hole of the second stage fixed disc through a feeding pipe, mixing the colloid with a second-stage mixing disc and a plurality of mixing disc mixing teeth of the following stages for multiple mixing, crushing and grinding, and continuously grinding and crushing the colloid to prepare a colloid product; in the last stage, qualified colloid product is discharged from the discharge port by a material driving member below the rotating disc.

Wherein the powder raw material is a mixture of kaolin and pseudo-boehmite, the liquid raw material is a mixture of molecular sieve slurry and alumina sol, and the liquid acid is hydrochloric acid solution; wherein the weight ratio of the powder raw material to the liquid raw material is as follows:

kaolin: molecular sieve: aluminum sol: liquid acid: the pseudo-boehmite is (0.5-5): (0.5 to 4): (0.1-3): (0.01-0.15): 1, wherein the solid-to-liquid ratio of the molecular sieve slurry (0.25-0.55) is as follows: 1; the weight ratio of the liquid acid to the pseudo-boehmite is (0.03-0.06): 1. in the preparation method of the catalytic cracking catalyst colloid provided by the invention, the hydrochloric acid solution is not limited, and a 37 wt% hydrochloric acid solution can be adopted.

According to the preparation method of the catalytic cracking catalyst colloid, the kaolin serving as a powder raw material is stably conveyed into a powder feeding port of a high-efficiency glue making machine by a powder metering conveyor (such as a screw conveyor, a rotary valve, a weightlessness scale and the like); the powder raw material pseudo-boehmite is stably conveyed into a powder feeding port of the high-efficiency glue making machine by a powder metering conveyor (which can be a screw conveyor, a rotary valve, a weightlessness scale and the like); the molecular sieve slurry is stably conveyed into a liquid/colloid feed inlet of the high-efficiency glue making machine by adopting a metering pump; the alumina sol is stably conveyed into a liquid/colloid feed inlet of the high-efficiency glue making machine by adopting a metering pump; the main shaft of the high-efficiency glue making machine drives the rotary mixing disc to rotate at a high speed under the driving of a motor, powder, colloid and liquid raw materials are quickly prepared into colloid under the action of high-speed shearing force and strong centrifugal force formed by an occlusion space of the mixing teeth of the first-stage mixing disc, the colloid enters the upper surface of the second-stage fixing disc through a space between the outer edge of the rotary disc and the shell and is collected in a central hole space of the second-stage fixing disc, meanwhile, liquid acid is continuously added into a space near the central hole of the second-stage fixing disc through a feeding pipe, an annular space pipe and a nozzle, is mixed with the colloid and enters the mixing discs of the second stage and the later stages, and the colloid is continuously ground and acidified into the colloid before spraying through the actions of multiple mixing, crushing and grinding of the mixing teeth; and in the last stage, the material driving member below the rotating disc discharges the grinded and acidified catalytic cracking catalyst colloid from the discharge port. Therefore, raw materials of the cracking catalyst, including powder, colloid and liquid, are continuously and efficiently prepared into the colloid before spray granulation. The method for producing the catalytic cracking catalyst by continuously forming the gel by using the continuous gel making machine realizes the automatic production of the catalyst, improves the production efficiency, reduces the manual labor, saves the energy, saves the raw materials and reduces the environmental pollution.

The continuous glue making method and the continuous preparation method of the catalytic cracking catalyst colloid are further described below with reference to the attached drawings.

FIG. 1 is a sectional elevation view of a continuous glue maker used in the method. The continuous glue making machine comprises an outer shell 1, a cover plate 2, a liquid or colloid feed inlet 3, a powder feed inlet 4, an acid liquor feed pipe 9, a fixed mixing disc 2 or 7, a rotary mixing disc 6 or 8, mixing teeth, a discharge port 5, a rotating shaft 10 and the like, wherein the rotating shaft 10 is arranged at the geometric center in the shell 1 through a bearing system support 12; from top to bottom, a circular pipe (powder feed inlet) is sleeved in an outer circular pipe (liquid/colloid feed inlet), the outer circular pipe is connected with a cover plate 2, a plurality of circles of mixing teeth 21 are distributed on the lower surface of the cover plate 2 and are meshed with a plurality of circles of mixing teeth 61 of a first-stage rotating disk 6 fixed on a rotating shaft to form a first-stage mixing disk; then downward fixed on the shell 1 by the outer wall, the center is perforated fixed disk 7 and the center is installed on the rotating shaft 10, the outer circle edge and the inner wall of the equipment shell 1 have certain clearance rotating disk 8 to compose the back several stages of mixing disks, the lower surface of the fixed disk in each stage of the combined mixing disk and the upper surface of the rotating disk are distributed with a plurality of rings of meshed mixing teeth in a concentric circle mode, the lower surface of the rotating disk in the last stage of the combined mixing disk is distributed with a component 11 for driving materials, a liquid acid feed pipe 9 is arranged between the first stage rotating disk 6 and the second stage fixed disk 7 and extends to an annular pipe 91 with a nozzle 92 at the center of the rotating shaft, a discharge port 5 is arranged on the side cone at the lower part of the equipment shell 1, the direction of the discharge port is consistent with the streamline direction of colloid in the grinding machine, and. The matched power can be driven by a motor through a shaft coupling or any one of transmission modes such as a belt 14, a gear, a chain wheel and the like, and the motor can be driven directly by frequency conversion speed regulation or speed regulation.

FIGS. 2 and 3 are cross-sectional views of the intermeshing teeth of two embodiments of mixing discs of a continuous glue maker, the cross-sectional positions of which are shown in M1-M1 or M3-M3 in FIG. 1. As shown in FIG. 2, the mixing teeth have a cylindrical structure, as shown in FIG. 3, the mixing teeth have a partial sector shape, or a combination of multiple structures, and the mixing teeth can be perpendicular to the disc surface or inclined at a certain angle; the fixed disc mixing teeth 21 or 71 and the

rotary mixing teeth

61 or 81 are alternately arranged in concentric circles with different radiuses from inside to outside by taking the center of the rotary disc as the center of a circle, and a certain space is reserved between the outermost edge of the rotary disc and the inner wall of the shell and used for the colloid to flow into the next-stage mixing disc. The number of turns of the mixing teeth of the first-stage mixing disc is 2-5 turns, preferably 2-4 turns, and the gaps (L1, L2 and L3 … …) between two adjacent radial teeth of the rotating disc and the fixed disc are 3-40 mm, preferably 5-30 mm, and most preferably 5-20 mm; gaps (a1, a2, a3 … …, b1, b2 and b3 … …) between two adjacent teeth of the same circle of the rotating disc and the fixed disc are 3-20 mm, preferably 4-20 mm, and most preferably 5-20 mm; when a partial fan-shaped mixed tooth structure is adopted, a back inclination angle (alpha 1, alpha 2 and alpha 3 … …) is formed by a slotting included angle between two teeth on the same circumference of the rotating disc and a circumferential normal line and a rotating direction at the position, a front inclination angle (beta 1, beta 2 and beta 3 … …) is formed by a slotting included angle between two teeth on the same circumference of the mixed teeth of the fixed disc and a circumferential normal line and a rotating direction at the position, and the inclination angle ranges from 0.5 degrees to 40 degrees, preferably from 1 degree to 35 degrees, and most preferably from 1 degree to 30 degrees; the length of the arc line of the circumference where the center of the mixing tooth is located is 5-35 mm, preferably 7-30 mm, and preferably 7-25 mm.

In the mixing disc after the second stage from top to bottom, the number of mixing teeth of the mixing disc is 2-12 circles, preferably 2-10 circles, and most preferably 3-6 circles, and the gap (L1, L2, L3 … …) between two adjacent radial teeth of the rotating disc and the fixed disc is 0.2-20 mm, preferably 0.4-15 mm, and most preferably 0.5-12 mm; gaps (a1, a2, a3 … …, b1, b2 and b3 … …) between two adjacent teeth of the same circle of the rotating disc and the fixed disc are 0.2-20 mm, preferably 0.4-15 mm, and most preferably 0.5-12 mm; when a partial fan-shaped mixed tooth structure is adopted, a back inclination angle (alpha 1, alpha 2 and alpha 3 … …) is formed by a slotting included angle between two teeth on the same circumference of the rotating disc and a circumferential normal line and a rotating direction at the position, and a front inclination angle (beta 1, beta 2 and beta 3 … …) is formed by a slotting included angle between two teeth on the same circumference of the mixed teeth of the fixed disc and a circumferential normal line and a rotating direction at the position, wherein the inclination angle ranges from 0.5 degrees to 40 degrees, preferably from 1 degree to 35 degrees, and most preferably from 1 degree to 30 degrees; the length of the arc line of the circumference where the center of the mixed tooth is located is 2-35 mm, preferably 3-30 mm, and preferably 3-25 mm.

FIG. 4 is a cross-sectional view of a liquid acid feed tube of the continuous gum making machine; a liquid acid feeding pipe 9 is arranged between the first-stage rotating disk 6 and the second-stage fixed disk 7 and extends to an annular pipe 91 with a nozzle 92 at the bottom at the central position of a rotating shaft, and the number of the nozzles 92 is not limited and is required to be uniformly distributed according to the center of the equipment.

FIG. 5 is a flow chart of a continuous preparation method of catalytic cracking catalyst colloid, wherein powder 1 (such as kaolin) is stored in a storage tank 19, powder 2 (such as pseudo-boehmite) is stored in a storage tank 18, the conveying amount of each powder is set according to the formula, the powder is conveyed into a ribbon mixing crusher 15 by respective powder meters 17 and 16, and large block-shaped powder is crushed into fine granular powder while the powder is conveyed by the ribbon crusher 15 and conveyed into a powder feeding port 4 of a rubber making machine through a connecting pipe; colloid 1 (such as molecular sieve slurry) or liquid 2 (such as alumina sol) is precisely metered and stably fed into a glue making machine through a liquid/colloid feeding pipe 31, powder, colloid and liquid fall into a first-stage rotating disk 6 of the glue making machine to meet, a mixing space formed by combining mixing teeth 61 on the upper surface of the mixing space and fixing teeth 21 below a cover plate 2 provides high-speed shearing force and strong centrifugal force for raw materials, the raw materials are rapidly prepared into colloid, the colloid enters the upper surface of a second-stage fixed disk 7 through a gap formed by the outer edge of the first-stage rotating disk 6 and a shell 1 and is gathered in a central hole space of the second-stage fixed disk 7, and meanwhile, liquid acid is continuously added into the space near the central hole of the second-stage fixed disk 7 through a feeding pipe 9, an annular space pipe 91 and a nozzle 92 and is mixed with the colloid to enter the mixing teeth of the second-stage and later-, The colloid is continuously ground, crushed and acidified into colloid before spraying; the material driving component 11 below the last-stage rotating disk 8 discharges the grinded and acidified colloid from the discharge port 5; the colloid can be directly stored in the buffer tank 11 and is conveyed to a spray dryer through a pipeline conveying pump 23 and a high-pressure pump 24 to be dried into catalyst particles, or can be directly conveyed into the high-pressure pump 24 through a pipeline 25 to be dried into catalyst particles by the spray dryer, and a switching valve 26 is arranged at the junction of the two colloid conveying pipelines to control a colloid feeding line.

The following examples further illustrate the invention, but the invention is not limited thereto.

Example 1

Example 1 illustrates the continuous preparation of catalytic cracking catalyst colloid and the results.

Adopting the catalytic cracking catalyst colloid preparation process shown in figure 5, kaolin powder is conveyed to a storage tank 18, pseudo-boehmite powder is conveyed to a storage tank 19, and kaolin is conveyed to a screw crusher 15 by a belt weigher 16 according to the conveying capacity of 1400 kg/h; conveying the pseudo-boehmite into a screw crusher 15 by a belt scale 17 according to the conveying amount of 900 kg/h; the kaolin and the pseudo-thin diasphore powder are conveyed into a powder feeding port 4 of a continuous glue making machine by a screw mixing crusher 15 according to 50r/min, molecular sieve slurry is conveyed into the continuous glue making machine by a metering pump according to 3860kg/h through a liquid feeding pipe 31, alumina sol is conveyed into a colloid feeding pipe 32 in the glue making machine according to 1850kg/h, the powder and the colloid are quickly prepared into primary colloid by the continuous glue making machine, then the primary colloid and 36 percent hydrochloric acid are continuously added into the continuous glue making machine according to 53.7kg/h through a liquid acid feeding port 9, the primary colloid and the 36 percent hydrochloric acid are continuously ground and acidified into catalyst spray colloid by a subsequent mixing disc, the catalyst spray colloid is discharged from a colloid discharging port 5 and directly conveyed to a high-pressure pump 24 through a pipeline 25, the catalyst finished product is obtained by spray drying, the time is about 3.5 tons and about 1.2 hours (including the time for starting and stopping for cleaning, the actual glue, the solid content is 37.6 percent, 8000kg of catalyst colloid is estimated to be prepared, and the results are shown in table 1 after the analysis of the strength, the activity and the stability of the catalyst; the particle size of the prepared colloid and the energy consumption in the colloid preparation process are compared and shown in Table 2.

The continuous glue making machine structure adopted in the embodiment 1 is as follows: the diameter of the outer shell is 600mm, the height is 1800mm, the diameter of the powder feed inlet 4 is 120mm, the diameters of the liquid and colloid feed inlets 31 and 32 are 50mm, the diameter of the liquid acid feed pipe is 15mm, the diameter of the discharge pipe is 100mm, the colloid making chamber of the continuous colloid making machine is composed of four-stage mixing discs, the first-stage mixing disc is composed of 4 circles of mixing teeth, the second-stage, third-stage and fourth-stage mixing discs are composed of 6 circles of mixing teeth, the mixing teeth of the first-stage mixing disc are cylindrical mixing teeth, the tooth space distance L1-L2-L3-10 mm, a 1-a 2-a 3-a 4-15 mm; the second, third and fourth-stage mixing disc mixing teeth are fan-shaped mixing teeth, the tooth space L1-L2-L3-2 mm, a 1-a 2-b 3-b 1-b 2-b 3-4 mm; the inclination angle of the rotary mixing teeth and the normal of the circular edge form a backward inclination angle of 30 degrees, the fixed disc mixing teeth and the rotating direction form a forward inclination angle of 30 degrees (namely, alpha 1 ═ alpha 2 ═ alpha 3 ═ beta 1 ═ beta 2 ═ beta 3 ═ 30 degrees), and the rotating speed of the rotating disc is 1100 r/min.

Wherein the power of the glue making machine is 45kW, the power of the feeding valves of the

powder

1 and 2 is 0.5kW, the power of the

powder metering scale

1 and 2 is 1.5kW, the power of the ribbon blender is 3kW, the power of the alumina sol and the molecular sieve metering pump is 2.2kW, and the power of the hydrochloric acid pump is 0.75kW.

Comparative example 1

Comparative example 1 is a prior art catalytic cracking catalyst colloid preparation method.

Adopts the traditional 2-level 10m³1400kg of kaolin, 900kg of pseudo-boehmite powder, 3860kg of molecular sieve slurry, 1850kg of alumina sol and 600kg of water are put into a first-stage stirring and mixing kettle, the mixture is stirred and mixed for 3 hours, the colloid is transferred into a second-stage stirring and mixing kettle, 53.7kg of 36% hydrochloric acid is added, the carrier colloid is prepared by 1 hour of stirring, the solid content of the colloid is 35%, 3.5 tons of finished catalyst products are obtained after spray drying, the time is about 4 hours, the power of a motor of the first-stage stirring kettle and the second-stage stirring kettle is 55kW., and the strength, the activity and the stability of the catalyst are analyzed, the result is shown in table 1, and the particle size of the prepared colloid and the energy consumption in the process of preparing the colloid are compared in table 2.

Example 2

Example 2 illustrates the continuous preparation of catalytic cracking catalyst colloid and the results.

The structure of the continuous glue maker is the same as that of the embodiment 1, and the preparation flow method of the catalyst colloid shown in the attached figure 5 is adopted, and the raw materials are as follows: the conveying capacity of the kaolin is 2100kg/h, the conveying capacity of the pseudo-boehmite is 1350kg/h, the conveying capacity of the molecular sieve slurry is 5790kg/h, the conveying capacity of the alumina sol is 2775kg/h, the conveying capacity of the hydrochloric acid with the concentration of 36% is 80.6kg/h, the pseudo-boehmite is continuously added into a glue making machine for mixing, then a subsequent mixing disc of a plurality of stages is continuously used for grinding and acidifying to form catalyst spray colloid, the catalyst spray colloid is discharged from a discharge port 5, the catalyst spray colloid is placed in a colloid buffer tank 24 and conveyed by a high-pressure pump 27, 5.25 tons of catalyst finished products are obtained through spray drying, the time is about 1.2h (the time comprises the start-up and shut-down cleaning time and the actual glue making time is about 1h), the solid content is 37.6% by colloid analysis, 12000kg of the prepared catalyst colloid is estimated, and the analysis of the strength, the activity and the stability.

Comparative example 2

Comparative example 2 is a prior art catalytic cracking catalyst colloid preparation method.

Adopts the traditional 2-stage 20m³A cracking catalyst colloid is prepared by a pot-type stirring kettle, 2100kg of kaolin, 1350kg of pseudo-boehmite powder, 5790kg of molecular sieve slurry, 2775kg of alumina sol and water are put into a first-stage stirring and mixing kettle for 900kg, the colloid is transferred into a second-stage stirring and mixing kettle after stirring for 3 hours, 80.6kg of 36% hydrochloric acid is added, acidification and stirring are carried out for 1 hour to prepare 12900kg of carrier colloid, the solid content of the colloid is 35%, 5.25 tons of catalyst finished products are obtained after spray drying, the colloid preparation takes about 4 hours, the results are shown in table 1 after analysis of the strength, the activity and the stability of the catalyst, and the comparison of the granularity of the prepared colloid and the energy consumption in the glue preparation process is shown in table 2.

TABLE 1 catalyst preparation procedure and catalyst product physical Properties

Note: abrasion index analysis method of catalyst is shown in RIPP 29-90 (analysis of petrochemical industry (RIPP test method), scientific Press, Yangchi et al 1990).

The prepared catalyst has a solid content of 86% and an analytical method shown in RIPP 29-90 (analysis of petrochemical industry (RIPP test method), scientific Press, Yangshui, etc. (1990)).

Analysis method of micro-reverse activity and hydrothermal stability of catalyst is shown in RIPP 92-90 (analysis method of petrochemical industry (RIPP test method), and scientific Press, Yangshui, etc. (1990)).

As seen from table 1: the preparation efficiency of the catalyst colloid in the embodiment 1 is 2.5 times that of the catalyst colloid in the comparison example 1, the activity of the prepared catalyst is basically equivalent, and the 17-hour hydrothermal stability is 3-4 percentage points higher than that of the catalyst colloid in the comparison example 1; example 2 the catalyst colloid preparation efficiency is 4 times of that of comparative example 2, the prepared catalyst activity and 17h hydrothermal stability are equivalent to those of example 1, and the 17h hydrothermal stability is 2 percentage points higher than that of comparative example 2. It can be seen from this that: the continuous gel making efficiency is high, and the prepared catalyst has good hydrothermal stability.

TABLE 2 catalyst spray colloid properties obtained during catalyst preparation and energy consumption of the process

As seen from table 2: the particle size distribution range of the colloid prepared in the

embodiments

1 and 2 is between 1 and 16 mu m, the median particle size is between 6 and 8 mu m, and the colloid has no particle groups larger than 1 mm; the particle size distribution range of the colloid prepared in the comparative examples 1 and 2 is between 5 and 2500 mu m, the median particle size is between 20 and 25 mu m, the colloid contains about 3.5 percent of 1-3 mm of micro-aggregates, and the colloid produced by continuous glue making has obviously finer particle size than that of batch glue making, which is beneficial to improving the strength of the catalyst. As shown by comparison of glue making energy consumption of examples 1 and 2 and comparative examples 1 and 2, the continuous glue making time is short, the mixing efficiency is high, two-stage mixing is needed for intermittent glue making, the mixing time is long, the power of a stirring motor is high, and the energy consumption is 5-7 times that of the continuous glue making process; the solid content of colloid in continuous glue making is higher than that in batch glue making, the drying water quantity is small, and the energy consumption for drying in batch glue making is high.

Claims

1. A continuous glue making method is characterized in that the adopted continuous glue making machine consists of an outer shell (1), a cover plate (2), at least one raw material feeding hole, a discharging hole (5), at least two stages of mixing discs and a transmission device (12);

the cover plate (2) is positioned at the top of the outer shell (1) and is movably connected with the outer shell, and a space enclosed by the cover plate (2) and the outer shell (1) is a glue making chamber;

the raw material feeding hole is arranged at the upper part of the cover plate (2) and communicated with the glue making chamber;

the lower surface of the cover plate (2) and the first-stage rotating disk (6) form a first-stage mixing disk, the lower part of the first-stage mixing disk is at least provided with a second-stage mixing disk formed by a second-stage fixed disk (7) and a second-stage rotating disk (8), and the matching surface of the fixed disk and the rotating disk in each stage of mixing disk is distributed with a plurality of rings of meshed mixing teeth;

a discharge hole (5) is formed in the lower part of the outer shell (1);

the rotating disks at all levels are respectively connected with a rotating shaft (10) and are connected with a transmission device (12) below the outer shell (2) through the rotating shaft (10), and the rotating shaft and the rotating disks are driven to rotate by a motor through the transmission device in the use process;

the powder raw materials are conveyed into the raw material feeding hole through metering, the liquid raw materials are conveyed into the raw material feeding hole through the metering pump, the motor drives the rotating shaft and the rotating disc to rotate at a high speed, the materials are mixed in the mixing space of the first-stage mixing disc in the glue making chamber to prepare colloid, the colloid is converged in the mixing space of the second-stage mixing disc through the outer edge of the first-stage rotating disc to be continuously mixed and ground, the colloid is further mixed and ground through the mixing discs of each stage, and the prepared colloid product is discharged from the discharging hole (5).

2. A continuous glue-making process according to claim 1, characterised in that a liquid acid feed pipe (9) is provided between said first stage mixing disc and said second stage mixing disc, one end of said liquid acid feed pipe (9) extending out of said outer casing (2);

the colloid prepared by grinding the first-stage mixing disc is converged into the central hole space of the second-stage mixing disc through the outer edge of the first-stage rotating disc, meanwhile, liquid acid is added into the central hole space through a liquid acid feeding pipe (9), and the liquid acid and the colloid are mixed and ground together through the later stages to prepare a colloid product.

3. The continuous glue making method according to claim 1 or 2, characterized in that the raw material feed inlet is composed of a powder feed inlet (4) and a liquid/colloid feed inlet (3), the powder feed inlet is arranged at the geometric center of the cover plate (2), and the liquid/colloid feed inlets (3) are symmetrically arranged at two sides of the powder feed inlet;

the powder raw materials are conveyed to the powder feeding port in a metering mode, the liquid raw materials are conveyed to the liquid/colloid feeding port in a metering mode and are mixed in the center of the first-stage mixing disc.

4. A continuous gel manufacturing process according to claim 3 wherein said liquid/gel inlet is provided as an annular space surrounding said powder inlet, said liquid/gel inlet being in communication with an external liquid or gel inlet conduit.

5. A continuous process according to claim 3, wherein a sheet-like structured material-driving member is provided on the back of the last stage rotary disk, and the bottom of the material-driving member is fitted to the inner surface of the bottom of the outer casing; the colloid product prepared by grinding and mixing the multi-stage mixing disc is pushed by the material driving component and is discharged from the discharge hole.

6. A continuous process for the production of glue according to claim 3, characterized in that the number of mixing discs is 3-8, each mixing disc is composed of a fixed disc and a rotating disc which are engaged with each other, the engaging surfaces of the fixed disc and the rotating disc of each mixing disc are provided with a plurality of circles of mixing teeth alternately arranged in a concentric circle manner in the radial direction, the fixed disc of each mixing disc is fixed on the outer casing (1), and the rotating disc of each mixing disc is fixed on the rotating shaft (10).

7. A continuous process for preparing adhesive according to claim 6, wherein the number of turns of the mixing teeth in the radial direction of the mixing disk of the next stage is increased, the pitch of the mixing teeth adjacent in the radial direction is decreased, the pitch of the mixing teeth adjacent in the circumferential direction is decreased, and the length of the arc of the circumference of the center of the mixing teeth adjacent in the circumferential direction is decreased, as compared with the mixing disk of the previous stage.

8. The continuous glue making method according to claim 7, wherein 2-5 circles of mixing teeth are arranged on the matching surface of the first-stage mixing disc and the rotating disc, wherein the distance between two adjacent mixing teeth in the radial direction is 5-40 mm, the distance between adjacent mixing teeth in the circumferential direction is 3-20 mm, and the length of a circumferential arc line at the center of the adjacent mixing teeth in the circumferential direction is 5-35 mm.

9. The continuous glue making method according to claim 8, wherein the matching surface of the first-stage mixing disc and the rotating disc is provided with 2-4 circles of mixing teeth along the radial direction, wherein the distance between two adjacent mixing teeth along the radial direction is 5-20 mm, the distance between adjacent mixing teeth along the circumferential direction is 5-20 mm, and the length of a circumferential arc line at the center of the adjacent mixing teeth along the circumferential direction is 7-25 mm.

10. The continuous glue making method according to claim 7, wherein 3-12 circles of mixing teeth are arranged on the matching surface of the mixing disc and the rotating disc after the second stage; wherein, the distance between adjacent mixing teeth along the circumferential direction is 0.2-20 mm, and the length of a circumferential arc line at the center of the adjacent mixing teeth along the circumferential direction is 2-35 mm.

11. The continuous glue making method according to claim 10, wherein 3-6 circles of mixing teeth are arranged on the matching surface of the mixing disc and the rotating disc after the second stage; wherein the distance between adjacent mixing teeth along the circumferential direction is 0.5-12 mm; the length of a circumferential arc line at the center of the adjacent mixing teeth in the circumferential direction is 3-25 mm.

12. The continuous glue-making method according to claim 1, characterized in that when the mixing teeth are in a partial fan-shaped structure, the included angle of the groove between two adjacent mixing teeth along the circumference on the rotating disc, the circumferential normal line of the position where the included angle is located and the rotating direction form a back-tilting angle α, and the range of the back-tilting angle α is 0.5-40 °; an included angle of a groove between two adjacent mixing teeth along the circumference on the fixed disc, a circumferential normal line of the position where the included angle is positioned and a rotating direction form a forward inclination angle beta, and the range of the forward inclination angle beta is 0.5-40 degrees.

13. The continuous process of claim 11, wherein said anteversion angle β is in the range of 1 ° to 35 °.

14. A continuous glue making method according to claim 5, characterised in that the number of the material driving members is 2-4.

15. The continuous glue making method according to claim 1, characterized in that a discharging pipe communicated with the discharging port (5) is arranged on the side surface of the outer shell (1), the axis of the discharging pipe is inclined downwards by about 20-40 degrees with the horizontal plane, and the projection on the horizontal plane is tangent to the circumferential surface of the shell.

16. A continuous preparation method of catalytic cracking catalyst colloid is characterized in that any one of the glue preparation methods of claims 2-13 is adopted, wherein the powder raw material is a mixture of kaolin and pseudo-boehmite, the liquid raw material is a mixture of molecular sieve slurry and aluminum sol, and the liquid acid is hydrochloric acid solution; wherein the weight ratio of the powder raw material to the liquid raw material is as follows:

kaolin: molecular sieve: aluminum sol: liquid acid: the pseudo-boehmite is (0.5-5): (0.5-4): (0.1-3): (0.01-0.15): 1, wherein the solid-to-liquid ratio of the molecular sieve slurry (0.25-0.55) is as follows: 1; the weight ratio of the liquid acid to the pseudo-boehmite is (0.03-0.06): 1.