CN111420585A - A kind of catalyst slurry automatic preparation system and preparation method - Google Patents

Abstract

The invention discloses an automatic preparation system and preparation method of catalyst slurry, comprising a raw material adding device, a pulping device and a circulating grinding device. The raw material adding device comprises a pure water pipeline, a first flow meter, a powder feeding tank, a first A weighing unit, at least one liquid raw material storage tank, a first adding pump and a second weighing unit, the pulping device includes a pulping mixing tank, a powder adding machine, a dust filter, an agitator in the tank, a third weighing unit, The jacket layer and the heat transfer medium pipeline are covered on the outside of the pulp mixing tank, and the circulating grinding device includes a first circulating pump, a vertical grinder and a mixing filter. The automatic preparation system of catalyst slurry designed by the invention realizes automatic proportioning and feeding of various raw materials by setting up multiple weighing units, flow meters, grinding devices and filtering devices, with high production efficiency, reducing labor intensity and health of operators. damage, solve the problem of uniformity and repeatability of the pulping process, and enhance the consistency of pulp products from different batches.

Description

A kind of catalyst slurry automatic preparation system and preparation method

technical field

The invention relates to the field of coating slurry preparation, in particular to a catalyst slurry automatic preparation system and preparation method.

Background technique

Auto catalysts are the most effective and key auto parts that use effective catalytic purification technology to reduce harmful substances in automobile exhaust. Automobile catalyst is a complex of a series of chemical materials, which consists of four parts: catalyst carrier, coating, catalyst auxiliary and active ingredient.

Catalyst slurrying is the first and most basic step in catalyst production. The slurry preparation system must produce a slurry that combines catalyst additives, active ingredients and base coating. At the same time, ensure that the slurry has good fluidity, uniformity, and anti-settling stability to avoid delamination or particle agglomeration during the coating process. Based on the two reaction functions of oxidation catalysis and reduction catalysis, as well as the exhaust gas composition for different working conditions, different products such as TWC, DOC, SCR, DPF, POC, and ASC are derived from auto catalysts. The slurry and characteristics required by different products are also completely different. The National VI catalyst has a wide range of slurry properties, including non-Newtonian fluid slurry with high solid content and thin slurry with low suspension properties and weak viscoelastic properties. At the same time, due to the great changes in the physical properties of the National VI catalyst raw materials, the particle size of the material is greatly reduced, the chemical activity of the catalyst is increased, and the health damage to the operators is relatively large.

At present, the domestic catalyst slurry preparation system generally adopts a non-standard design according to a specific process. The cycle from design to installation and commissioning is relatively long, the cost is relatively high, and the later expansion capacity is limited. Once the production enterprise needs to expand the product type or production capacity according to its own development, it needs to re-customize a new preparation system, which increases the investment cost of the enterprise, takes time and labor, and also takes up a lot of production space.

In addition, because most companies do not fully understand the characteristics of equipment and devices, they cannot choose matching production processes and equipment components. A large number of manual work increases labor intensity and the risk of health damage, and also brings quality instability. The changing and cleaning workload is large, the cleaning time is long, and the material loss is more.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the prior art, the present invention provides a catalyst slurry automatic preparation system and preparation method, which can realize automatic proportioning and feeding of various raw materials, increase production efficiency, and reduce the labor intensity and health damage of operators. The technical solution is as follows:

In one aspect, the present invention provides an automatic preparation system for catalyst slurry with high repeatability and high controllability, which includes a raw material adding device, a pulping device and a circulating grinding device, and the raw material adding device includes a raw material for adding pure water. The pure water pipeline and the first flow meter for measuring the amount of pure water raw material flowing through it; the raw material adding device also includes a powder feeding tank for adding powder raw materials and a powder feeding tank for weighing powder feeding The first weighing unit of the tank, the first weighing unit is used to measure the addition amount of the powder raw material in the powder feeding tank;

The raw material adding device also includes at least one liquid raw material storage tank for adding liquid raw materials, a first addition pump arranged on the pipeline between the liquid raw material storage tank and the pulping mixing tank, and a liquid raw material storage tank for weighing liquid raw materials. the second weighing unit of the tank, the second weighing unit is used to measure the addition amount of the liquid raw material in the liquid raw material storage tank;

The pulping device includes a pulping mixing tank connected with the raw material adding device, a powder feeder for conveying powder raw materials to the pulping mixing tank, and a dust removal filter connected with the pulping mixing tank , an in-tank agitator for stirring the raw materials in the pulping mixing tank and a third weighing unit for weighing the pulping mixing tank, the third weighing unit is used for weighing the addition of materials in the pulping and mixing tank weight; the agitator in the tank includes a rotating blade and a scraper arranged on the rotating blade, the scraper can collide with the inner wall of the pulping mixing tank, and the scraper rotates with the rotating blade to rotate;

The pulping device further includes a jacket layer coated on the outside of the pulping mixing tank and a heat transfer medium pipeline connected to the jacket layer, wherein a temperature adjustment medium is contained in the heat transfer medium pipeline, and the temperature The adjustment medium is one of cooling water, high temperature water, high temperature heat transfer oil or steam;

The circulating grinding device comprises a first circulating pump connected with the pulping mixing tank, a vertical grinding machine connected with the first circulating pump, and a mixing tank connected with both the pulping mixing tank and the vertical grinding machine filter.

Further, the vertical powder feeding machine includes a powder feeding assembly, and the powder feeding assembly includes a first driving mechanism, a hollow shell, a jacket spindle disposed in the hollow shell, and a main shaft connected with the hollow shell. A powder suction port that is connected with each other, a hollow structure is formed between the hollow shell and the main shaft of the jacket, and the powder raw materials in the powder feeding tank can enter the hollow structure through the powder suction port;

The upper end of the main shaft of the jacket is connected with the first driving mechanism, the lower end protrudes out of the hollow shell, and the lower end is fixed with stirring blades in the circumferential direction, and the hollow shell is provided with a cover with a hollow structure. the casing, so that the stirring blade is accommodated in the casing, and driven by the first driving mechanism, the main shaft of the jacket rotates, thereby driving the stirring blade to rotate.

Further, the vertical powder feeder further includes a pneumatic lifting mechanism, the pneumatic lifting mechanism includes a lifting guide rail, an extension arm connected with the lifting guide rail, and a second driving mechanism connected with the extension arm, the first The driving mechanism is connected with the extension arm, the lifting guide rail is arranged in parallel with the hollow shell, and the lifting rail is arranged vertically with the extension arm. moving in the longitudinal direction, thereby driving the powder adding assembly to move closer to or away from the slurry mixing tank along its axial direction.

Further, the vertical grinding machine includes a grinding assembly, a transmission mechanism and a power mechanism, and the grinding assembly includes a grinding chamber, a main shaft that can extend into the grinding chamber, a dispersing disc arranged outside the main shaft, and a A plurality of baffle rings on the inner wall of the grinding chamber, a filter screen arranged at the bottom of the grinding chamber, and upper and lower end caps respectively arranged at the upper and lower ends of the grinding chamber, and the grinding chamber is provided with a material inlet and a material outlet, the material inlet is close to the upper part of the grinding chamber, and the material outlet is arranged at the bottom of the grinding chamber;

The grinding chamber has a hollow cavity, the dispersing disc includes a plurality of grinding parts arranged in sequence from top to bottom, and a distance is maintained between every two adjacent grinding parts, and the grinding parts are arranged along the circumferential direction of the main shaft, A plurality of grinding beads are arranged in the cavity of the grinding chamber, and driven by the power mechanism, the transmission mechanism drives the main shaft to rotate, so as to drive the grinding part to rotate, thereby driving the grinding beads to move.

Further, the mixing filter includes a casing, a stirring member disposed in the casing, a filter screen disposed in the casing, and an end cover detachably disposed at one end of the casing, the stirring member An integrated structure, the stirring member is fixedly connected with the end cover; the casing has a hollow cavity extending along its axial direction, the stirring member extends along the axial direction of the hollow cavity, and the filter mesh surrounds the casing The inner side wall of the body is arranged, and the filter net is distributed with a plurality of filtering holes;

The casing has a first feeding port, a second feeding port and a discharging port, and the first feeding port and the second feeding port are all arranged at the end of the casing away from the end cover, and the A material addition valve is provided at the second feed port; the discharge port is close to the end cover, and the end of the casing with the end cover is provided with a sampling valve.

Further, the liquid raw material storage tank includes a first liquid raw material storage tank and a second liquid raw material storage tank, and a first addition pump is provided on the pipeline between the first liquid raw material storage tank and the pulping and mixing tanks. A second addition pump is arranged on the pipeline between the second liquid raw material storage tank and the slurry mixing tank; the automatic catalyst slurry preparation system also includes a compressed air automatic purging pipe connected to the pipeline in the circulating grinding device road.

Further, the raw material adding device also includes a third adding pump for adding precious metal solution raw materials and a second flow meter for measuring the added amount of precious metal solution raw materials flowing therethrough, the third adding pump and mixing filter The feed port of the machine is connected, or the third addition pump is connected with the pulping mixing tank.

On the other hand, the present invention also provides a preparation method based on an automatic preparation system of catalyst slurry, characterized in that it comprises the following steps:

S1, set the corresponding qualified weight and qualified range of the various raw materials required in the formula of the catalyst carrier;

S2. Use the third weighing unit to measure the original weight of the pulping mixing tank;

S3, adding a raw material into the pulping mixing tank, and measuring the added amount through the weighing unit or the flow meter of the raw material adding device corresponding to the raw material;

S4, use the third weighing unit to measure the first weight of the pulping mixing tank containing the raw materials in step S3; then calculate the difference between the first weight and the original weight, and determine whether the difference is in one of the raw materials. Within the qualified range, if yes, then go to step S5; if not, go back to step S3;

S5, adding another raw material other than the raw material added in S3 into the pulping mixing tank through the corresponding raw material adding device, and the added amount is measured by the corresponding raw material adding device weighing unit or flow meter;

S6. Use the third weighing unit to measure the second weight of the pulping mixing tank containing the raw materials, then calculate the difference between the second weight and the first weight, and determine whether the difference is within the qualified range of one of the raw materials If yes, go to step S7; if no, go back to step S5;

S7, adding another raw material other than the raw material added in step S3 and the raw material added in step S5 into the pulping mixing tank through the corresponding raw material adding device, and the added amount is determined by the corresponding raw material adding device weighing unit or flow meter measurement;

S8. Use the third weighing unit to measure the third weight of the pulping mixing tank containing the raw material in step S7, then calculate the difference between the third weight and the second weight, and determine whether the difference is in one of the raw materials Within the qualified range, if yes, then go to step S9; if not, go back to step S7;

S9. Add another raw material other than the raw material added in step S3, the raw material added in step S5, and the raw material added in step S7 into the pulping mixing tank, and then use the third weighing unit to measure the The fourth weight of the pulping mixing tank of the raw materials, calculate the difference between the fourth weight and the third weight, and judge whether the difference is within the qualified range of one of the raw materials,

S10. Continue to add any one of the remaining raw materials each time until all the raw materials are added to obtain the catalyst mixed slurry.

Further, after each step S4-S9 is completed independently, the following steps may also be included:

The raw materials in the pulping mixing tank are sent to the vertical mill, and after grinding, the raw materials are sent to the mixing filter for filtration, and then the filtered raw materials are sent to the pulping mixing tank.

Further, after step S10, the following steps may also be included:

Use the third weighing unit to measure the total weight of the pulping mixing tank, and then calculate the difference between the total weight and the preset qualified total weight of the various raw materials required in the formula, and determine whether the difference is within the deviation range. , the slurry is qualified; if not, the slurry is unqualified.

The beneficial effects brought by the technical scheme provided by the invention are as follows:

a. The catalyst slurry automatic preparation system designed by the present invention realizes automatic proportioning and feeding of various raw materials by setting up multiple weighing units, flow meters, grinding devices and filtering devices, with short pulping time and high production efficiency. Reduce the labor intensity and health damage of operators, solve the problems of uniformity and repeatability of the pulping process, enhance the consistency of different batches of pulp products, and meet the strict quality management specifications of the automotive industry;

b. The automatic preparation system of the catalyst slurry designed by the present invention adopts a multi-batch and multi-specification rapid production process design; the produced products are fast in type change, fast in cleaning, high in efficiency, low in residual material and low in waste, and meet the requirements of the National VI catalyst production automation, intelligence and refinement;

c. Highly integrated, technological, high-precision computer feedback of valves and instruments, which facilitates precise control of the process; small footprint requirements, flexible layout, rational use of space, and greatly improved space utilization in the workshop; Remaining interface and rich functions; special parts and structure design, easy maintenance and long service life;

d. In the automatic preparation system and preparation method of the catalyst slurry designed by the present invention, the addition of all raw materials adopts the mode of one-time direct measurement and two-time measurement and review, which can ensure the accuracy of raw material addition and stabilize the quality reliability of the slurry;

e. The preparation system and preparation method designed in the present invention can produce slurry with good fluidity, ensure the uniformity of catalyst coating thickness, and at the same time, the slurry has good anti-settling stability to avoid delamination during the coating process or particle agglomeration

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the front view of the catalyst slurry automatic preparation system provided by the embodiment of the present invention;

FIG. 2 is a side view of an automatic preparation system for catalyst slurry provided by an embodiment of the present invention;

Fig. 3 is the front view of the powder feeder of the catalyst slurry automatic preparation system provided by the embodiment of the present invention;

Fig. 4 is the front view of the filter of the catalyst slurry automatic preparation system provided by the embodiment of the present invention;

FIG. 5 is a front view of a vertical grinder of the catalyst slurry automatic preparation system provided by the embodiment of the present invention.

Wherein, the reference numerals include: 1-pulp mixing tank, 2-first circulating pump, 3-grinding assembly, 31-grinding cavity, 32-dispersing disc, 33-filter screen, 34-lower end cover, 35-baffle Ring, 36-upper end cap, 37-double mechanical seal, 38-spindle, 39-slave pulley, 40-master pulley, 51-power mechanism, 52-hydraulic cylinder, 53-equipment housing, 54-hydraulic solenoid valve group, 55 -Hydraulic pump, 56-hydraulic oil tank, 57-equipment base, 4-mixing filter, 41-material adding valve, 42-stirring part, 43-housing, 44-screen, 45-end cover, 46-sampling Valve, 5- The third addition pump, 6- Powder feeding tank, 7- Vertical powder feeder, 70- Hollow shell, 71- Jacketed spindle, 72- Stirring blade, 73- Powder suction port, 74-Connecting flange, 75-Sealing structure, 76-First drive mechanism, 77-Extension arm, 78-Second drive mechanism, 79-Lifting rail, 80-Housing, 81-Base, 8-First add Pump, 9-first liquid raw material storage tank, 10-dust filter, 11-second liquid raw material storage tank, 12-second addition pump, 13-first pressure sensor, 14-pure water pipeline, 15-th A flowmeter, 16-second flowmeter, 17-third weighing unit, 18-first weighing unit, 19-second weighing unit, 20-in-tank agitator, 201-scraper, 21-pass Heat medium pipeline, 22-electrical control cabinet, 23-jacket layer.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, apparatus, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

In one embodiment of the present invention, an automatic catalyst slurry preparation system is provided. The specific structure is shown in FIG. 1 and FIG. 2 , which includes a raw material adding device, a pulping device and a circulating grinding device.

The raw material adding device includes a pure water pipeline 14 for adding pure water raw material and a first flow meter 15 for measuring the added amount of pure water raw material flowing therethrough. The pure water inlet is indicated by b in Fig. 1 .

The raw material adding device also includes a powder feeding tank 6 for adding powder raw materials and a first weighing unit 18 for weighing the powder feeding tank, and the powder feeding tank 6 is used for holding powder raw materials. , through peeling, the first weighing unit 18 can measure the added amount of powder raw materials in the powder feeding tank.

The powder feeding tank is provided with a plurality of feeding ports for powder media, and the feeding ports can be connected with pipelines, which are respectively connected with the two-layer powder storage bins, and can be automatically fed according to process requirements.

The raw material addition device also includes at least one liquid raw material storage tank for adding liquid raw materials, a first addition pump 8 arranged on the pipeline between the liquid raw material storage tank and the pulping mixing tank 1, and a first addition pump 8 for weighing liquid. The second weighing unit 19 of the raw material storage tank, through tare, the second weighing unit 19 can measure the addition amount of the liquid raw material in the liquid raw material storage tank, and accurately add it to the pulping mixing tank through the first adding pump 8 Add liquid ingredients.

According to different proportions of different catalyst slurries, the liquid raw material storage tanks can be set in multiple numbers. In an embodiment provided by the present invention, the liquid raw material storage tanks include a first liquid raw material storage tank 9 and a second liquid raw material storage tank 9 The raw material storage tank 11, a first addition pump 8 is arranged on the pipeline between the first liquid raw material storage tank 9 and the pulping mixing tank 1, and the first liquid raw material is stored in the first liquid raw material storage tank 9, The first liquid raw material is transported into the first liquid raw material storage tank 9 through the first addition pump 8; the pipeline between the second liquid raw material storage tank 11 and the pulping mixing tank 1 is provided with a second addition pump 12, so The second liquid raw material storage tank 11 contains the second liquid raw material, and the second liquid raw material is transported into the first liquid raw material storage tank 9 through the second addition pump 12 .

The pulping device includes a pulping mixing tank 1 connected to the raw material adding device, a powder feeding machine 7 for conveying powder raw materials to the pulping mixing tank 1, and connected to the pulping mixing tank 1 The dust filter 10, the in-tank agitator 20 for stirring the raw materials in the pulping mixing tank 1, and the third weighing unit 17 for weighing the pulping mixing tank, by peeling, the third weighing unit 17. The added weight of the materials in the pulping mixing tank can be weighed; the agitator 20 in the tank includes a rotating blade and a scraper 201 arranged on the rotating blade, and the scraper 201 can be mixed with the pulping The inner wall of the tank 1 collides, and the scraper 201 rotates with the rotation of the rotating paddle, so as to scrape the material on the inner wall of the tank.

The pulping device also includes a jacket layer 23 wrapped on the outside of the pulping mixing tank 1 and a heat transfer medium pipeline 21 connected to the jacket layer 23, and the heat transfer medium pipeline 21 is provided with a temperature adjustment. The temperature adjustment medium is one of cooling water, high temperature water, high temperature heat transfer oil or steam. The heat transfer medium pipeline 21 can be cooling water to cool the pulping mixing tank 1; The type and temperature of the heat transfer medium are selected according to the different formulation requirements of various slurries.

The bottom of the pulp mixing tank 1 is equipped with a special tank bottom ball valve, the valve port can be connected to a pipeline, and a switching valve port with a standard interface is fixed on the pipeline, which can be automatically switched according to process requirements. The special tank bottom ball valve can eliminate the dead space in the tank and prevent the slurry from settling or agglomerating at the valve port.

The specific structure of the powder feeding machine 7 is as follows: it is installed on the top of the pulping mixing tank, and the vertical powder feeding machine 7 includes a powder feeding assembly, and the powder feeding assembly includes a first driving mechanism 76 and a hollow shell 70 . , the jacket main shaft 71 arranged in the hollow shell 70 and the powder suction port 73 communicated with the hollow shell 70; The hollow cavity structure of the inhaled material, the powder raw material in the powder feeding tank enters the hollow structure of the hollow shell 70 through the powder suction port 73 . The hollow shell 70 is preferably a cylindrical structure or a cube structure, and the hollow shell 70 can be other achievable structural forms with a hollow cavity.

The upper end of the jacket main shaft 71 is connected to the first driving mechanism 76 , the lower end of which protrudes out of the hollow shell 70 , and the lower end is circumferentially fixed with a stirring paddle 72 , and the stirring paddle 72 has multiple blades. Such a structure, for example, the stirring blade 72 is a two-blade stirring blade, a three-blade stirring blade or a multi-blade stirring blade, that is, the stirring blade 72 includes one or more blades, and the individual blades may be wedge-shaped with A hollow fan ring with a certain thickness, or the leaves are strip-shaped, or the leaves are petal-shaped.

The hollow casing 70 is provided with a casing 80 with a hollow structure, so that the stirring blades 72 are accommodated in the casing 80, and the stirring blades 72 are not in contact with the inner wall of the casing 80. The cover 80 is close to the lower end of the hollow casing 70 . The cover shell 80 is fixedly connected to the hollow shell 70 through a bracket, the bracket is preferably a tripod, which plays a fixed connection role, and makes the cover shell 80 have an open structure at the upper and lower ends, such as a hollow cylindrical structure .

When the lower part of the hollow shell 70 and the lower part of the jacket main shaft 71 protrude into the pulp mixing tank 1 containing the liquid, and the cover shell 80 is in contact with the liquid, that is, the cover shell 80 and the stirring blade 72 must be immersed in the liquid. Below the liquid level of the pulping mixing tank 1, under the driving of the first driving mechanism 76 (the first driving mechanism is preferably a motor), the jacket main shaft 71 rotates around its own axis direction, thereby driving the The stirring blade 72 rotates at a high speed inside the casing 80, the liquid on the stirring blade 72 is pushed away, and the root of the blade generates a vortex and a vacuum. , the vacuum can suck the powder raw material in the powder feeding tank into the powder suction port, the hollow shell and the stirring blade 72 in sequence, so that the powder raw material and the liquid in the pulping mixing tank 1 can be quickly mixed and dispersed.

The hollow shell 70 , the jacket main shaft 71 , the cover shell 80 and the bracket are all made of stainless steel, with high strength and long service life.

The powder suction port 73 is close to the upper part of the hollow shell 70. The powder suction port 73 is provided with a valve. The valve can be disassembled from the powder suction port 73. When the powder material in the powder feeding tank needs to pass through. When the vertical powder feeder 7 is input into the pulp mixing tank 1, open the valve; if it is not needed, close the valve.

In an embodiment of the present invention, the vertical powder feeder 7 further includes a pneumatic lifting mechanism and a base 81 arranged on one side of the pulping mixing tank 1. The specific structure of the pneumatic lifting mechanism is as follows: The pneumatic lifting mechanism includes a lifting guide rail 79 arranged on the base 81, an extension arm 77 connected with the lifting guide rail 79, and a second driving mechanism 78 connected with the extension arm 77. The first driving mechanism 76 is connected to the extension arm 77. The arm 77 is connected, the lifting guide rail 79 is arranged in parallel with the hollow housing 70, and the lifting guide rail 79 is arranged perpendicular to the extension arm 77. Driven by the second driving mechanism 78, the extension arm 77 moves along the The lifting guide rail 79 moves in the length direction (ie up and down direction), thereby driving the powder adding assembly to move closer to or away from the pulp mixing tank 1 along its axial direction (ie up and down direction). The second driving mechanism 78 is an air cylinder, and the piston rod of the air cylinder is connected with the extension arm 77 . By setting the pneumatic lifting mechanism, the position of the stirring blade 72 can be adjusted according to the liquid level in the pulping mixing tank 1, so that the powder suction ability can achieve the maximum effect.

The vertical powder feeder also includes a sealing structure 75 disposed between the first driving mechanism 76 and the hollow shell 70. The sealing structure 75 is preferably a double mechanical sealing structure, which serves to seal the first For the function of the driving mechanism 76 and the hollow housing 70, the double mechanical seal is a commonly used mechanical rotary seal, and there are many brands and models to choose from, and the sealing structure is not limited in this application. The vertical powder feeder also includes a connecting flange 74 sleeved outside the hollow shell 70, which is used to cooperate with the pulping mixing tank, so that there is a gap between the hollow shell 70 and the pulping mixing tank. The airtight structure enhances the airtightness; the connecting flange is a conventional design, and its specific structure is not described in this application.

The specific embodiment of using a vertical powder feeder in a slurry configuration process is as follows: the powder suction port of the vertical powder feeder is connected with the discharge port of the powder feeding tank through a pipeline, and when the stirring blade is completely submerged When it is below the liquid level of the pulping mixing tank, the stirring blade is driven by the motor and then rotates at a high speed, and a vortex and vacuum are generated at the stirring blade, and this vacuum can completely suck the powder material in the powder feeding tank into the stirring blade. At the blade, the powder material and the liquid in the pulping mixing tank are quickly mixed and dispersed, and the blade disperses the powder material at a high speed, so that it can be quickly dissolved in the liquid, or form a suspended mixture with the liquid, to avoid the powder and liquid contacting. Aggregation and precipitation will not cause dust waste and pollute the working environment. When this process is carried out continuously, the powder raw materials in the powder feeding tank are completely and quickly sucked into the pulping mixing tank, without causing loss and waste of raw materials, and at the same time ensuring the accuracy of adding powder raw materials.

The vertical powder feeder has a pneumatic lifting mechanism, which can adjust the position of the paddle according to the liquid level in the tank, so that the powder suction capacity can achieve the maximum effect.

In the process of slurry configuration, the powder suction port of the powder feeder is connected with the discharge port of the powder weighing tank through a pipeline, and the vacuum can completely suck the powder raw material in the powder weighing tank into the blade, and remove the powder. Quickly mix and disperse with the liquid in the pulping mixing tank. When this process is carried out continuously, the powder in the powder weighing tank is sucked into the pulping mixing tank completely and quickly, without causing loss and waste of raw materials, and at the same time ensuring the accuracy of addition.

A dust filter 10 is installed on the top of the pulp mixing tank to prevent the powder from rising outward when the powder feeder is working. The feeding port of the powder feeding machine is connected with the pure water automatic valve, which can automatically clean the inside of the main shaft of the powder feeding machine with high-pressure water, and rinse the residual slurry on the inner wall of the powder suction pipe to ensure that impurities will not be caused by impurities in the next use. Affects the accuracy of powder raw materials.

The circulating grinding device includes a first circulating pump 2 connected with the pulping mixing tank 1, a vertical grinding machine 3 connected with the first circulating pump 2, and the pulping mixing tank 1 and the vertical grinding machine. 3 are connected to the mixing filter 4.

The specific structure of the vertical grinding machine 3 is as follows: the vertical grinding machine includes a grinding assembly, a transmission mechanism and a power mechanism 51 , and the grinding assembly includes a grinding chamber 31 , a main shaft 38 that can extend into the grinding chamber 31 , The dispersing disc 32 arranged outside the main shaft 38 , a plurality of baffle rings 35 arranged on the inner wall of the grinding chamber 31 , the filter screen 33 arranged at the inner bottom of the grinding chamber 31 , and respectively arranged in the grinding chamber 31 With the lower end caps 34 and the upper end caps 36 at both ends, the grinding chamber 31 will not undergo displacement changes during the process of grinding materials.

The specific structure of the grinding chamber 31 is as follows: the grinding chamber 31 has a hollow cavity, the grinding chamber 31 is provided with a material inlet and a material outlet, and the material inlet is close to the upper part of the grinding chamber 31, as shown in Fig. 5 e. Refers to; the material outlet is arranged at the bottom of the grinding chamber 31, as indicated by f in FIG. 5, that is, the material can continuously enter the grinding chamber 31 from top to bottom. The grinding chamber 31 is preferably a structure that narrows from top to bottom, such as a conical structure, so that the material can be fully ground when entering the grinding chamber.

The specific structure of the dispersing disc 32 is as follows: the dispersing disc 32 includes a plurality of grinding parts arranged in sequence from top to bottom, and a distance is maintained between every two adjacent grinding parts, and the grinding parts are along the circumferential direction of the main shaft 38 . Direction setting, the grinding part is a two-blade blade, a three-blade blade or a multi-blade blade, and an individual blade has various structural forms, for example, an individual blade can be a hollow fan ring with a certain thickness, or a blade It has a strip-shaped structure, or the blades have a petal-shaped structure, and the blades are inclined relative to the horizontal plane, which can achieve a good grinding and stirring effect.

In an embodiment provided by the present invention, the specific structure of the transmission mechanism is as follows: the transmission mechanism includes a main pulley 40 and a slave pulley 39 arranged opposite to each other, and the chain is wound around the main pulley 40 and the slave pulley 39 Above, the main pulley 40 is connected with the power mechanism 51, the slave pulley 39 is connected with the main shaft 38, and the power mechanism 51 is preferably the main motor.

A plurality of grinding beads are arranged in the cavity of the grinding cavity 31 , the diameter of the grinding beads is determined according to the particle size of the material to be ground, and the total volume of the grinding beads is 50-70% of the volume of the grinding cavity 31 . Driven by the power mechanism 51, the transmission mechanism drives the main shaft 38 to rotate, which in turn drives the grinding member to rotate, and the grinding member rotates to drive the grinding beads to flip up and down, and the material passes through the grinding chamber from top to bottom. The grinding beads in the body are driven by the dispersing disc and then contact the material in reverse from bottom to top and squeeze and crush the solid particles in the slurry (the solid particles are dispersed by grinding, and the auto catalyst slurry preparation system must produce catalyst additives, active ingredients and The slurry combined with the base coating, at the same time, ensure that the slurry has good fluidity, uniformity, and anti-settling stability, avoid delamination or particle agglomeration during the coating process), achieve a good grinding and stirring effect, and realize the material uniformity to obtain a uniform material solution. The grinding beads are made of wear-resistant materials such as glass and ceramics.

Further, the inner wall of the grinding chamber 31 is provided with a plurality of baffle rings 35, and the baffle rings 35 are annular structures, that is, the baffle rings 35 are attached to the inner wall, when the material enters from the material inlet from top to bottom. During the grinding chamber, during the rotation of the main shaft 38 and the dispersing disc 32, the baffle ring 35 is provided to make the material liquid fully contact with the dispersing disc, prolong the contact time, and improve the grinding and stirring effect.

Further, the inner bottom of the grinding chamber 31 is provided with a filter screen 33, the filter screen 33 is provided with a plurality of filter holes, the diameter of the filter holes is smaller than the diameter of the grinding beads, and the filter screen 33 is used for filtering impurities. , and prevent the grinding beads from flowing out to the material outlet.

A double mechanical seal structure 37 is arranged between the upper end cover 36 and the main shaft 38 to enhance the sealing and prevent the material in the grinding chamber from overflowing. There is pressurized cooling water between the sealing rings to prevent the material from being squeezed into the connection between the main shaft and the double mechanical seal structure when the main shaft is running. The cooling water can take away part of the heat generated at the connection between the main shaft and the double mechanical seal structure when the main shaft rotates When the main shaft rotates, neither the double mechanical seal structure nor the upper end cover rotates. The double mechanical seal is a commonly used mechanical rotary seal, and there are many brands and models to choose from. The structure of the double mechanical seal is not limited in this application.

Further, both the inside of the upper end cover 36 and the inside of the lower end cover 34 have a hollow structure capable of accommodating a cooling medium. The upper and lower sides of the upper end cover 36 are flat plates, and one of the inner sides of the upper end cover 36 has a raised spiral guide groove, and the upper and lower sides are flat. When the two sides are merged, the middle part is a suspended structure. After the suspended part of the outer circumference of the upper end cover 36 is sealed by welding, cooling water can be introduced. During the grinding process of some materials, more heat will be generated and affect the performance of the material. Cooling water is introduced to reduce the temperature to maintain the performance of the material.

The vertical grinding machine also includes a lifting mechanism, and the lifting mechanism includes a hydraulic cylinder 52, a hydraulic oil tank 56, a hydraulic pump 55 and a hydraulic solenoid valve group 54. The hydraulic oil tank 56, the hydraulic pump 55 and the hydraulic solenoid valve group 54 are composed of The hydraulic circuit, the hydraulic cylinder 52 and the hydraulic oil tank 56 are both arranged on the equipment base 57, the piston rod of the hydraulic cylinder 52 is connected with the transmission mechanism, and driven by the hydraulic cylinder 52, the transmission mechanism drives the All of the above are moved until they are separated from the grinding chamber 31, which is convenient for manual cleaning of the interior of the grinding chamber. For example, the main shaft 38, the upper end cover 36 and the dispersing disc 32 move upward and leave the grinding chamber 31, and the main shaft 38 is far away from the grinding chamber 31; Until the upper end cap 36 is set on the grinding chamber 31 , the main shaft 38 is partially in the grinding chamber 31 .

The vertical grinder is arranged in the equipment housing 53 for protection and easy installation.

The new vertical grinder provided in this application is suitable for the production of materials with high viscosity (slow flow) and the production of residual materials in the grinding chamber, such as the grinding production of catalyst slurry with precious metals; the materials to be ground pass through the material inlet It enters the grinding chamber and is discharged from the material outlet. The ground material can be naturally discharged from the lower material outlet by gravity.

Further, the grinding chamber 31 is communicated with the external compressed air automatic purging pipeline or the cleaning liquid pipeline, so that the compressed air or the cleaning liquid can enter the grinding chamber through the material inlet. When cleaning the grinding chamber, the compressed air or cleaning liquid (or pure water) is introduced from the material inlet to flush the grinding chamber. After cleaning, the residual accumulated material in the grinding chamber is very small, and the grinding chamber can even be cleaned without opening the grinding chamber, which can effectively The residual material in the grinding chamber is discharged and cleaned, thereby reducing the time and workload of a lot of manual disassembly and cleaning.

The novel vertical grinding machine provided by the present application can discharge and clean the residual materials in the grinding chamber while ensuring a good grinding effect, has high production efficiency, and reduces the labor intensity and health damage of operators. It can not only achieve good grinding and stirring effect, realize material uniformity to obtain uniform material solution, but also discharge residual materials in the grinding chamber, with good cleaning effect, short grinding time, high production efficiency, and reduce labor intensity and health of operators. damage; small footprint requirements, flexible layout, easy maintenance, and long service life.

The vertical grinders are arranged separately, and a certain maintenance space is reserved between the pulping modules, so as to facilitate the maintenance of the vertical grinder. The vertical grinding machine can achieve the best cleaning effect, suitable for the preparation of National VI catalysts, and achieve automatic flexible production and rapid product changeover.

The specific structure of the mixing filter 4 is as follows: the mixing filter 4 includes a housing 43, a stirring member 42 arranged in the housing 43, a filter screen 44 arranged in the housing 43, and a detachable The end cover 45 is arranged on one end of the casing 43, the stirring member 42 is fixedly connected with the end cover 45, and the end cover 45 is detachably arranged on the casing 43 through a sanitary chuck. After the end cover is unloaded , the stirring part 42, the filter screen and other components inside the shell 43 can be taken out, which is convenient for inspection and cleaning or manual cleaning of the inside of the shell 43, and it is also very convenient to re-install.

The specific structure of the casing 43 is as follows: the casing 43 has a hollow cavity extending along its axial direction, and the casing 43 is preferably a cylindrical structure. One end of the casing 43 is provided with an end cover 45, and the other end is provided with a sealing cover. The first feed port communicates with the casing 43 through the sealing cover, and the sealing cover is fixedly connected with the casing 43, such as welding, to increase the sealing effect. sex.

The shell 43 has a first feeding port, a second feeding port and a discharging port (the first feeding port is indicated by g in Fig. 4, and the discharging port is indicated by f in Fig. 4). A feeding port and a second feeding port are both disposed at the end of the casing 43 away from the end cover 45 , and the first material is input into the casing 43 through the first feeding port, and the second feeding A material addition valve 41 is arranged at the material inlet, and the material addition valve 41 is opened, and the second material can be input into the shell 43 through the second material inlet. Input the second material at the feed port. The flow direction of the first material entering the casing through the first feed port is perpendicular to the flow direction of the second material entering the casing through the second feed port.

The discharge port is arranged on the outer side wall of the casing 43 and is close to the end cover 45, and the flow direction of the material through the discharge port is perpendicular to the flow direction of the material through the first feed port; the casing The end of 43 with end cap 45 is provided with a sampling valve 46 for quick and safe sampling of the mixed material.

The specific structure of the stirring member is as follows: the stirring member 42 extends along the axial direction of the housing 43, the stirring member 42 is an integral structure, and the stirring member 42 is preferably a continuous structure of a spiral shape blade or a wave shape Blades, the stirring member 42 may be other structures, such as other irregular-shaped blades extending outward. Both the first material solution and the second material solution have a certain flow rate when passing through the shell 43, and the forward flow rate of the first material solution is guided by the blades of the stirring member 42 to generate radial and tangential speeds, so that the The second material solution added by the second feed port can be quickly mixed with the first material solution. If there are solid particles in one of the materials, the other material can be attached and combined with the solid particles; because the shell 43 is made of stainless steel Made of material with good thermal conductivity, the heat generated during the mixing process can be taken away by the online mixing filter housing. The stirring member 42 remains stationary when the material passes through the mixing filter housing, and it can promote the full mixing of the two materials without other external power driving, so as to save energy consumption.

In an embodiment provided by the present invention, the slurry of the auto catalyst is carried out through a mixing filter, the first material is a slurry obtained by mixing multiple materials, and the slurry contains solid particles, and the second material is a precious metal solution, and the precious metal There is a little precipitation in the solution. When the first material passes through the mixing filter, the forward flow rate of the first material is guided by the stirring member in the cavity to generate radial and tangential speeds, so that the precious metal solution can quickly mix with the first material. The inner solid particles are attached and bonded to prevent the hydrolysis of precious metals.

A distance is maintained between the end of the stirring member 42 away from the end cover 45 and the end of the casing 43 with the first feeding port, so that when the two materials enter the casing 43, there is a certain mixing space.

In an embodiment provided by the present invention, the filter screen 44 is arranged around the inner side wall of the housing 43, and a plurality of filter holes are distributed on the filter screen 44; the filter screen 44 is detachably arranged on the Inside the casing 43 , it is convenient to unload and reinstall. The filter screen 44 is an annular structure and surrounds the inside of the casing 43 . The filter screen installed inside the online mixing filter can retain impurities such as precipitation and precipitation in the material, improve the anti-settling stability of the discharged mixed material, and has a good filtering effect, avoiding stratification or particle agglomeration in the subsequent process.

When the two raw materials are mixed through the mixing filter, the forward flow rate of one material is guided by the blades of the stirring member in the cavity to generate radial and tangential speeds, so that the two materials are fully mixed to form a mixed solution. The mixing process The heat generated in the filter can be carried away by the hybrid filter housing. The internal filter screen of the mixing filter can retain impurities such as precious metal precipitation and precipitation impurities, improve the anti-settling stability of the mixed material, and avoid stratification or particle agglomeration in the subsequent process.

The raw material addition device also includes a third addition pump 5 for adding precious metal solution raw materials and a second flow meter 16 for measuring the addition amount of precious metal solution raw materials flowing therethrough. The feed port of the device 4 is connected, or the third addition pump 5 is connected to the pulp mixing tank 1 . The third addition pump 5 is used to accurately add the precious metal solution into the mixing filter or the pulping mixing tank 1. The addition speed and total amount of the precious metal solution are measured by the second flow meter 16, and the precious metal solution is expensive. Precise measurements are required to reduce waste.

After all the raw materials are mixed in the pulping mixing tank to form a slurry, when the slurry passes through the mixing filter, the forward flow velocity of the slurry is guided by the blades of the stirring member in the cavity to generate radial and tangential speeds. The precious metal solution added here can be quickly attached and combined with the solid particles in the slurry, and the heat generated during the mixing process can be taken away by the mixing filter housing. The internal filter screen of the mixing filter can intercept the slurry inclusions caused by precious metal precipitation, precipitation, grinding bead inclusions, etc., improve the anti-settling stability of the slurry, and avoid delamination or particle agglomeration in the subsequent process. The in-line mixing filter features a sampling valve for quick and safe slurry sampling, a quick-opening end cap on one end, and a sanitary chuck connection. After the end cover is opened, the internal stirring parts, filters, sampling valves and other parts can be taken out for inspection and cleaning or manual cleaning. There is a little precipitation in the precious metal solution, the third addition pump 5 is preferably connected to the feed port of the mixing filter 4, and the precious metal solution is filtered and then transported to the pulp mixing tank.

The automatic catalyst slurry preparation system also includes an automatic purging pipeline of compressed air (the compressed air inlet is indicated by a in Fig. 1 ) communicated with the pipeline in the circulating grinding device. When the conveying pump sends all the slurry in the pulping mixing tank to the subsequent process equipment, the automatic valve at the inlet of the first circulating pump opens, and compressed air is introduced into the pipeline to purge the residual slurry in the entire conveying pipeline. clean. If the first pressure sensor 13 at the compressed air pipeline shows that the pressure is low, the automatic control software will give an alarm to remind the operator to check whether there is any residual material inside.

The powder raw materials in the powder feeding tank 6 are measured and passed through the powder feeder 7, so that the powder raw materials are stirred and mixed with the pure water and liquid raw materials input in the pulp mixing tank 1 to form a mixture, and the mixture is passed through the vertical grinder 3. Cyclic grinding finally produces a catalyst active slurry coating that meets physical and chemical properties.

When the pulping process is completed, the pulping and transfer are completed, and the pulping and batching is completed again, the cleaning and spraying device inside the pulping mixing tank (the pulping mixing tank has a plurality of built-in cleaning and spraying devices, and is connected to the pure water pipeline and The automatic valve) and the pure water valve are opened, and the inside of the pulp mixing tank is automatically cleaned with high-pressure water, and the residual slurry on the inner wall of the pulp mixing tank is washed clean. Refers to) to be collected in the designated cleaning tank. After the cleaning liquid in the tank is collected, the automatic valve connected to the pure water at the inlet of the first circulating pump is opened, and the inside of the slurry conveying pipeline can be automatically cleaned with high-pressure water, and the residual slurry on the inner wall of the pipeline can be washed clean. The pure water for cleaning is cumulatively measured by the first flow meter 15 . A second pressure sensor is arranged on the pipeline between the pure water pipeline 14 and the first flow meter 15. If the second pressure sensor of the pure water pipeline shows a low pressure, the automatic control software will give an alarm to remind the operator to confirm the cleaning effect. Whether there is any residual material left inside after it is not good.

The catalyst slurry automatic preparation system provided by the present invention also includes a plurality of storage bins for storing various raw materials with different characteristics, which are placed on the second-layer platform, and the powder raw materials in the bins are quantified by the screw feeder It is conveyed and put into the powder feeding tank arranged on the first floor platform by gravity.

The catalyst slurry automatic preparation system provided by the present invention also includes an electrical control cabinet 22, the electrical control cabinet includes a touch operation display screen, a control system, a frequency converter, and automatic control software, which can complete the pulping process according to different slurry formulations. The proportioning addition of all raw materials adopts a direct measurement and a secondary measurement review mode to stabilize the quality reliability of the slurry. Based on the automatic control software, all preparation process data can be recorded and saved for quality traceability.

The pulp mixing tank is fixed on the main platform frame, including the platform, the legs at the bottom of the platform, the frame fixed around the platform, and the stairs fixed on one side of the platform. One side of the platform is fixed with an electrical control cabinet, and the components in the cabinet are It is connected with the motors, sensors, automatic valves, etc. of each device through cables, and the cables are laid in the bridge frame. Circulating pump, adding pump, powder adding machine, mixing filter, weighing device, powder feeding tank and various automatic valves, pipelines, instruments and meters are installed on the platform frame, and combined with the main platform to form an integrated pulping module. The vertical grinder is arranged separately from the main platform and is connected to the pulping module through a hose. The power supply and control of the vertical grinder are connected to the electrical control cabinet through cables. The vertical mills are arranged separately, and a certain maintenance space is reserved between the pulping modules to facilitate the maintenance of the vertical mill.

The present invention also provides a preparation method based on the catalyst slurry automatic preparation system, which comprises the following steps:

S1, set the corresponding qualified weight and qualified range of the various raw materials required in the formula of the catalyst carrier;

S2. Use the third weighing unit to measure the original weight of the pulping mixing tank;

S3. Add a raw material (referred to as the first raw material) into the pulping mixing tank, and measure the added amount through the weighing unit or the flow meter of the raw material adding device corresponding to the raw material (the amount of the first raw material is measured in real time during the addition process). Addition amount), it can be assumed that the first raw material is pure water, and the first flow meter is used to measure its actual addition amount;

S4. Use the third weighing unit to measure the first weight of the pulping mixing tank containing the raw materials in step S3, and then calculate the difference between the first weight and the original weight, and determine whether the difference is in one of the raw materials. If it is within the qualified range, go to step S5; if not, return to step S3; at this time, "if no" is divided into two cases, the first case is that the difference is less than the qualified range, indicating that the amount of the first raw material added is less than qualified weight, it is necessary to return to step S3, and continue to add this raw material until the raw material is within the preset qualified range; the second case is that the difference is greater than the qualified range, indicating that the amount of the first raw material added is greater than the qualified weight, and it needs to be judged that the excess is extracted The raw material is still the qualified weight of each raw material in the redesigned formula; through the above-mentioned difference measurement, it can also be judged whether the first raw material is pure water, if it is pure water, and the difference is within the qualified range of pure water, then step S5 is performed; In this step, the amount of addition is checked to ensure the accuracy of the addition of raw materials;

S5. Add another raw material (second raw material) other than the raw material added in S3 into the pulping mixing tank through the corresponding raw material adding device, and the added amount is determined by the corresponding raw material adding device weighing unit or flow meter Measurement, real-time measurement of the added amount of the second raw material during the addition process, it can be assumed that the second raw material is a powder raw material, and the first weighing unit is used to obtain the actual added amount;

S6. Use the third weighing unit to measure the second weight of the pulping mixing tank containing the raw materials, then calculate the difference between the second weight and the first weight, and determine whether the difference is within the qualified range of one of the raw materials If yes, then go to step S7; if no, go back to step S5, at this time "if no" is divided into two cases, the first case is that the difference is less than the qualified range, indicating that the second raw material addition is less than the qualified weight, It is necessary to return to step S5, and continue to add this raw material until the raw material is within the preset qualified range; the second case is that the difference is greater than the qualified range, indicating that the added amount of the second raw material is greater than the qualified weight, and it is necessary to judge whether to give up or redesign the formula The qualified weight of each raw material;

S7. Add another raw material (third raw material) other than the raw material added in step S3 and the raw material added in step S5 into the pulping mixing tank through the corresponding raw material addition device, and the addition amount is added by the corresponding raw material The device weighing unit or flow meter is used for measurement, and the added amount of the third raw material is measured in real time during the addition process. It can be assumed that the third raw material is a liquid raw material, and the second weighing unit is used to obtain the actual added amount;

S8. Use the third weighing unit to measure the third weight of the pulping mixing tank containing the raw material in step S7, then calculate the difference between the third weight and the second weight, and determine whether the difference is in one of the raw materials If it is within the qualified range, then execute step S9; if not, return to step S7; at this time, "if no" is divided into two cases, the first case is that the difference is less than the qualified range, indicating that the amount of the third raw material added is less than Qualified weight, it is necessary to return to step S7, and continue to add this raw material until the raw material is within the preset qualified range; the second case is that the difference is greater than the qualified range, indicating that the added amount of the third raw material is greater than the qualified weight, and it is necessary to judge whether to give up or not Redesign the qualified weight of each ingredient in the formula;

S9. Add another raw material (fourth raw material) other than the raw material added in step S3, the raw material added in step S5, and the raw material added in step S7 into the pulping mixing tank, and the addition amount is determined by the corresponding raw material The weighing unit or flow meter of the adding device is used for measurement; the addition amount of the fourth raw material is measured in real time during the addition process. It can be assumed that the fourth raw material is a precious metal solution raw material, and the second flow meter is used to obtain the actual addition amount; The weight unit measures the fourth weight of the pulping mixing tank containing the raw materials, calculates the difference between the fourth weight and the third weight, and judges whether the difference is within the qualified range of one of the raw materials. The detection method is the same as that of S7 and S7. S8;

S10. Continue to add any one of the remaining raw materials each time, and each time one raw material is added is performed through a direct metering and a second metering review, until all the raw materials are added, and the catalyst mixed slurry is obtained.

In practical applications, the formulas are different, and the types of raw materials that need to be added in each formula are different. According to the types of raw materials, it is determined that steps S3 (belonging to one-time direct measurement) and S4 (belonging to secondary measurement review), S5 and S6 need to be repeated many times. , S7 (belonging to primary direct measurement) and S8 (belonging to secondary measurement review), S9 is substantially the same as S3 and S4, that is, the addition of all raw materials adopts the mode of primary direct measurement and secondary measurement review, which can ensure the accuracy of raw material addition, and then Stable slurry quality reliability.

After each step S4-S9 is completed individually, the following steps may also be included:

The raw materials in the pulping mixing tank are sent to the vertical mill, and after grinding, the raw materials are sent to the mixing filter for filtration, and then the filtered raw materials are sent to the pulping mixing tank, that is, adding a After the raw materials are ground and filtered, they are then sent to the pulping mixing tank after filtering, and then the next raw material is added.

After step S10, the following steps may also be included: using the third weighing unit to measure the total weight of the pulping mixing tank, and then calculating the difference between the total weight and the preset qualified total weight of multiple raw materials required in the formula, and Judge whether the difference is within the deviation range, if yes, the slurry is qualified; if not, the slurry is unqualified.

After each step S1-S9 is completed individually, the following steps may also be included:

Open the heat transfer medium valve (the heat transfer medium pipeline 21 is provided with a heat transfer medium valve), so that the temperature adjustment medium enters the jacket layer of the pulping mixing tank, and the raw materials in the pulping mixing tank are cooled or heated; Choose whether to cool or heat according to different product characteristics, weather, and temperature.

After the catalyst mixed slurry in the pulping mixing tank is transported to the next processing process, the weight of the pulping mixing tank is reset to zero, the compressed air purge is turned on, and the compressed air is introduced into the pipeline to blow the residual slurry in the entire conveying pipeline. Sweep clean to complete the entire pulping process.

The automatic preparation system of catalyst slurry designed by the present invention is fully suitable for automatic preparation of slurry of various varieties and characteristics by setting multiple weighing units, flow meters, grinding devices and filtering devices, and realizes the automatic proportioning of various raw materials. and feeding, the pulping time is short, the production efficiency is high, the labor intensity and health damage of the operators are reduced, the uniformity and repeatability of the pulping process are solved (avoid the multiple addition of materials), and the consistency of different batches of pulp products can be achieved. Enhanced to meet the strict quality management specifications of the automotive industry; the equipment has a compact structure and fully automated operation, which can maximize the use of equipment capacity requirements; the rapid changeover design is adopted to meet the changeover production of various catalysts; the unique online automatic cleaning design , reduce the residual and wastage of raw materials.

The automatic preparation system of the catalyst slurry designed by the invention adopts a multi-batch and multi-specification rapid production process design; the produced products are fast in type change, fast in cleaning, high in efficiency, low in residual material and low in waste, and meet the requirements of the automation of national VI catalyst production. , intelligent and refined; highly integrated, technological, high-precision computer feedback of valves and instruments, which facilitates precise control of the process; small footprint requirements, flexible layout, rational use of space, and greatly improved space utilization in the workshop; Flexible expansion, rich reserved interfaces and functions; special components and structure design, easy maintenance and long service life;

In the automatic preparation system and preparation method of the catalyst slurry designed by the present invention, the addition of all raw materials adopts the mode of one-time direct metering and two-time metering review, which can ensure the accuracy of adding the raw materials, thereby stabilizing the quality reliability of the slurry; the preparation system designed by the present invention The preparation method can produce slurry with good fluidity, ensure the uniformity of catalyst coating thickness, and at the same time, the slurry has good anti-settling stability to avoid delamination or particle agglomeration during the coating process.

At the same time, because the physical properties of the National VI catalyst raw materials are greatly changed, the particle size of the materials is greatly reduced, the chemical activity of the catalyst is increased, and the health of the operators is greatly damaged. Protect.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. An automatic preparation system of catalyst slurry is characterized by comprising a raw material adding device, a slurry preparing device and a circulating grinding device,

the raw material adding device comprises a pure water pipeline (14) for adding pure water raw material and a first flow meter (15) for measuring the adding amount of the pure water raw material flowing through the pure water pipeline;

the raw material adding device also comprises a powder feeding tank (6) for adding the powder raw material and a first weighing unit (18) for weighing the powder feeding tank, wherein the first weighing unit (18) is used for metering the adding amount of the powder raw material in the powder feeding tank;

the raw material adding device further comprises at least one liquid raw material storage tank for adding liquid raw materials, a first adding pump (8) arranged on a pipeline between the liquid raw material storage tank and the pulping mixing tank (1) and a second weighing unit (19) for weighing the liquid raw material storage tank, wherein the second weighing unit (19) is used for metering the adding amount of the liquid raw materials in the liquid raw material storage tank;

the pulping device comprises a pulping mixing tank (1) connected with the raw material adding device, a vertical powder adding machine (7) used for conveying powder raw materials to the pulping mixing tank (1), a dust removal filter (10) connected with the pulping mixing tank (1), an in-tank stirrer (20) used for stirring the raw materials in the pulping mixing tank (1) and a third weighing unit (17) used for weighing the pulping mixing tank, wherein the third weighing unit (17) is used for weighing the adding weight of the materials in the pulping mixing tank; the in-tank stirrer (20) comprises a rotating paddle and a scraper (201) arranged on the rotating paddle, the scraper (201) can be abutted against the inner wall of the pulping mixing tank (1), and the scraper (201) rotates along with the rotation of the rotating paddle;

the pulping device further comprises a jacket layer (23) coated on the outer side of the pulping mixing tank (1) and a heat transfer medium pipeline (21) connected with the jacket layer (23), wherein a temperature adjusting medium is contained in the heat transfer medium pipeline (21), and the temperature adjusting medium is one of cooling water, high-temperature heat transfer oil or steam;

the circulating grinding device comprises a first circulating pump (2) connected with the pulping mixing tank (1), a vertical grinding machine (3) connected with the first circulating pump (2) and a mixing filter (4) connected with the pulping mixing tank (1) and the vertical grinding machine (3).

2. The automatic catalyst slurry preparation system according to claim 1, wherein the vertical powder adding machine (7) comprises a powder adding assembly, the powder adding assembly comprises a first driving mechanism (76), a hollow shell (70), a jacket main shaft (71) arranged in the hollow shell (70), and a powder suction port (73) communicated with the hollow shell (70), a hollow structure is formed between the hollow shell (70) and the jacket main shaft (71), and powder raw materials in the powder feeding tank can enter the hollow structure through the powder suction port (73);

the upper end part of the jacket main shaft (71) is connected with a first driving mechanism (76), the lower end part of the jacket main shaft extends out of the hollow shell (70), stirring blades (72) are circumferentially and fixedly arranged at the lower end part of the jacket main shaft, a hollow-structure housing (80) is arranged outside the hollow shell (70), so that the stirring blades (72) are accommodated in the housing (80), and the jacket main shaft (71) rotates under the driving of the first driving mechanism (76) to further drive the stirring blades (72) to rotate.

3. The automatic catalyst slurry preparation system according to claim 2, wherein the vertical type powder adding machine (7) further comprises a pneumatic lifting mechanism, the pneumatic lifting mechanism comprises a lifting guide rail (79), an extension arm (77) connected with the lifting guide rail (79) and a second driving mechanism (78) connected with the extension arm (77), the first driving mechanism (76) is connected with the extension arm (77), the lifting guide rail (79) is arranged in parallel with the hollow shell (70), the lifting guide rail (79) is arranged perpendicular to the extension arm (77), and under the driving of the second driving mechanism (78), the extension arm (77) moves along the length direction of the lifting guide rail (79), so that the powder adding component is driven to move close to or far away along the axial direction of the powder adding component in the pulping mixing tank (1).

4. The automatic catalyst slurry preparation system according to claim 1, wherein the vertical grinder (3) comprises a grinding assembly, a transmission mechanism and a power mechanism (51), the grinding assembly comprises a grinding chamber (31), a main shaft (38) capable of extending into the grinding chamber (31), a dispersion disc (32) arranged outside the main shaft (38), a plurality of baffle rings (35) arranged on the inner wall of the grinding chamber (31), a filter screen (33) arranged at the bottom in the grinding chamber (31), and an upper end cover (36) and a lower end cover (34) respectively arranged at the upper end and the lower end of the grinding chamber (31), the grinding chamber (31) is provided with a material inlet and a material outlet, the material inlet is close to the upper part of the grinding chamber (31), and the material outlet is arranged at the bottom of the grinding chamber (31);

the grinding cavity (31) is provided with a hollow cavity, the dispersion disc (32) comprises a plurality of grinding parts which are sequentially arranged from top to bottom, a space is kept between every two adjacent grinding parts, the grinding parts are arranged along the circumferential direction of the main shaft (38), a plurality of grinding beads are arranged in the cavity of the grinding cavity (31), and under the driving of the power mechanism (51), the transmission mechanism drives the main shaft (38) to rotate so as to drive the grinding parts to rotate and further drive the grinding beads to move.

5. The automatic catalyst slurry preparation system according to claim 1, wherein the mixing filter (4) comprises a housing (43), an agitating member (42) arranged in the housing (43), a filter screen (44) arranged in the housing (43), and an end cap (45) detachably arranged at one end of the housing (43), the agitating member (42) is of an integral structure, and the agitating member (42) is fixedly connected with the end cap (45); the casing (43) is provided with a hollow cavity extending along the axial direction of the casing, the stirring component (42) extends along the axial direction of the hollow cavity, the filter screen (44) is arranged around the inner side wall of the casing (43), and a plurality of filter holes are distributed on the filter screen (44);

the shell (43) is provided with a first feeding hole, a second feeding hole and a discharging hole, the first feeding hole and the second feeding hole are both arranged at one end, far away from the end cover (45), of the shell (43), and a material adding valve (41) is arranged at the second feeding hole; the discharge hole is close to the end cover (45), and one end of the shell (43) with the end cover (45) is provided with a sampling valve (46).

6. The automatic catalyst slurry preparation system according to claim 1, wherein the liquid raw material storage tanks comprise a first liquid raw material storage tank (9) and a second liquid raw material storage tank (11), a first addition pump (8) is arranged on a pipeline between the first liquid raw material storage tank (9) and the pulping mixing tank (1), and a second addition pump (12) is arranged on a pipeline between the second liquid raw material storage tank (11) and the pulping mixing tank (1);

the automatic catalyst slurry preparation system further comprises a compressed air automatic purging pipeline communicated with the pipeline in the circulating grinding device.

7. The automatic catalyst slurry preparation system according to claim 1, wherein the raw material addition device further comprises a third addition pump (5) for adding the noble metal solution raw material and a second flow meter (16) for measuring the addition amount of the noble metal solution raw material flowing therethrough, the third addition pump (5) is connected to the feed port of the mixing filter (4), or the third addition pump (5) is connected to the slurry mixing tank (1).

8. A method for preparing an automatic catalyst slurry preparing system according to any one of claims 1 to 7, comprising the steps of:

s1, setting the corresponding qualified weight and qualified range of a plurality of raw materials required in the formula of the catalyst carrier;

s2, measuring the original weight of the pulping mixing tank by using a third weighing unit;

s3, adding a raw material into the pulping mixing tank, and metering the addition amount by a weighing unit or a flow meter of a raw material adding device corresponding to the raw material;

s4, measuring the first weight of the pulping mixing tank containing the raw materials in the step S3 by using a third weighing unit; calculating the difference between the first weight and the original weight, and judging whether the difference is within the qualified range of one of the raw materials, if so, executing the step S5; if not, returning to the step S3;

s5, adding another raw material except the raw material added in the S3 into the pulping mixing tank through a corresponding raw material adding device, wherein the addition amount is measured by a weighing unit or a flow meter of the corresponding raw material adding device;

s6, measuring the second weight of the pulping mixing tank containing the raw materials by using a third weighing unit, calculating the difference value between the second weight and the first weight, judging whether the difference value is within the qualified range of one of the raw materials, and if so, executing the step S7; if not, returning to the step S5;

s7, adding another raw material except the raw material added in the step S3 and the raw material added in the step S5 into the pulping and mixing tank through a corresponding raw material adding device, wherein the addition amount is measured by a weighing unit or a flow meter of the corresponding raw material adding device;

s8, measuring the third weight of the pulping mixing tank containing the raw materials in the step S7 by using a third weighing unit, calculating the difference value between the third weight and the second weight, judging whether the difference value is within the qualified range of one of the raw materials, and if so, executing the step S9; if not, returning to the step S7;

s9, adding another raw material except the raw material added in the step S3, the raw material added in the step S5 and the raw material added in the step S7 into the pulping and mixing tank, measuring the fourth weight of the pulping and mixing tank containing the raw materials by using a third weighing unit, calculating the difference value between the fourth weight and the third weight, judging whether the difference value is within the qualified range of one raw material,

and S10, continuing to add any one of the rest raw materials each time until all the raw materials are added, and obtaining the catalyst mixed slurry.

9. The method of preparing an automatic catalyst slurry preparing system according to claim 8, further comprising the steps of, after each of the steps S4-S9 is individually completed:

conveying the raw materials in the pulping mixing tank into a vertical grinder, grinding, conveying the raw materials into a mixing filter for filtering, and conveying the filtered raw materials into the pulping mixing tank.

10. The method for preparing an automatic catalyst slurry preparing system according to claim 8, further comprising, after step S10, the steps of:

measuring the total weight of the pulping mixing tank by using a third weighing unit, calculating the difference value between the total weight and the preset qualified total weight of various raw materials required in the formula, and judging whether the difference value is within the deviation range, if so, the pulp is qualified; if not, the slurry is unqualified.

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