CN215996578U - Low-viscosity slurry catalyst filling system - Google Patents
Low-viscosity slurry catalyst filling system Download PDFInfo
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- CN215996578U CN215996578U CN202121092214.8U CN202121092214U CN215996578U CN 215996578 U CN215996578 U CN 215996578U CN 202121092214 U CN202121092214 U CN 202121092214U CN 215996578 U CN215996578 U CN 215996578U
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Abstract
The utility model provides a low-viscosity slurry catalyst filling system which comprises a raw material metering device, a preparation tank, a feeding pump, a low-viscosity slurry catalyst metering unit, a feeding angle valve and a reaction kettle, wherein the raw material metering device, the preparation tank, the feeding pump, the low-viscosity slurry catalyst metering unit, the feeding angle valve and the reaction kettle are sequentially connected; a grinding unit connected with the preparation tank. By adopting the filling system, the problems of sedimentation, uneven concentration and wide catalyst particle size distribution in the slurry catalyst conveying process can be solved, continuous feeding is stabilized, the reaction is ensured to be carried out stably, and the product performance is improved.
Description
Technical Field
The utility model belongs to a catalyst filling system, and particularly relates to a low-viscosity slurry catalyst filling system.
Background
At present, the device for producing the high polymer material adopts two adding modes of the Z-N catalyst, namely a liquid catalyst or a solid catalyst. The continuous polymerization device has the advantages that the solid catalyst is easy to feed unevenly, the reaction progress and the product quality are influenced, and most continuous polymerization processes adopt a liquid/slurry catalyst feeding scheme. Compared with a solid powder catalyst, the slurry catalyst filling scheme has high catalytic activity, the slurry catalyst is beneficial to the dispersion and distribution of the catalyst in a reaction system, the activity of the slurry catalyst is 5-6 times that of the solid catalyst, and the whole cost of the related process flow equipment is low. The investment of the solid catalyst feeder is several times of the investment of slurry catalyst filling facilities, and the whole alkyl aluminum in the slurry catalyst filling scheme is only 1/3 of the solid catalyst, so that the catalyst cost is reduced. And the processing performance of the product produced by the slurry catalyst reaction is superior to that of the solid catalyst filling process.
At present, slurry catalyst is easy to deposit and block pipelines, and continuous filling is unstable. The product performance is affected after the use amount of the compound agent with high viscosity is large and the compound agent is introduced into the product. The concentration change in catalyst delivery causes reaction fluctuation, which is not favorable for production control.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention aims to provide a low viscosity slurry catalyst injection system which allows for a narrow catalyst particle size distribution and uniform concentration, and prevents catalyst settling and plugging.
Referring to fig. 1, wherein 1 is a raw material metering device, 2 is a preparation tank, 3 is a feed pump, 4 is a low viscosity slurry catalyst metering unit, 5 is a feed angle valve, 6 is a reaction kettle, 7 is a grinding unit, and 8 is a pipeline.
The utility model provides a low-viscosity slurry catalyst filling system which comprises a raw material metering device, a preparation tank, a feeding pump, a low-viscosity slurry catalyst metering unit, a feeding angle valve and a reaction kettle, wherein the raw material metering device, the preparation tank, the feeding pump, the low-viscosity slurry catalyst metering unit, the feeding angle valve and the reaction kettle are sequentially connected;
a grinding unit connected with the preparation tank.
In the present invention, the raw material metering device includes a sealed-type weight loss scale that satisfies that the solid catalyst does not contact air, and a mass flow meter that satisfies that the liquid formulation does not contact air.
In the utility model, the preparation tank 2 is internally provided with stirring and jacket cooling, so that the primary preparation and mixing of materials are met and the materials can be stored for a long time. The viscosity of the prepared low-viscosity slurry catalyst is 20-100 cp. The stirring mode in the preparation tank adopts a combined mode of ribbon stirring and anchor stirring, which is beneficial to the dispersion of the solid catalyst. The coil pipe is arranged in the jacket of the preparation tank, so that the preparation tank can be cooled and stored and can be heated at the same time.
In the utility model, a circulating grinding mode is adopted between the grinding unit and the preparation tank.
In the present invention, the feed pump is a screw pump, and a slurry catalyst with certain viscosity and particles can be used. In the specific embodiment, a single-screw pump is adopted, and the flow can be controlled by adopting frequency conversion.
In the present invention, the low viscosity slurry catalyst metering unit includes a mass flow meter, while being equipped with a regulating valve for controlling the feed amount; in the utility model, the grinding unit can comprise a micron-sized grinder, and the precision of the ground material can reach the micron level; the grinding unit can also comprise a nano-scale grinder, and the precision of the ground material reaches the nano-scale. The utility model leads in on-line grinding equipment to carry out wet grinding, thus ensuring the uniform particle size and concentration of the catalyst; the narrow micron-sized particle size distribution of the catalyst is realized, and the development of high-performance products is facilitated. The problem of large fluctuation of the reaction caused by uneven concentration of the slurry catalyst is solved by adopting a wet grinding mode; the preparation adopted by the utility model reduces the problem of blockage caused by sedimentation in the conveying process, also solves the problems of inaccurate measurement and unstable reaction activity caused by concentration problem, and the residual quantity of the preparation in the product is lower than 50ppm, thereby reducing the influence on the product performance and expanding the application of the product in the high-performance field.
In the utility model, the raw material metering device comprises a catalyst metering device and a compound solvent metering device which are respectively connected with the configuration tank.
In the utility model, a stirring device is arranged in the preparation tank.
The compounding agent input by the grinding unit and the compounding solvent metering device ensures that all components of the catalyst are uniform and consistent; the catalyst is MgCl2(ii) a The compound agent comprises a solvent and a dispersant; the solvent comprises n-hexane and/or n-heptane; the dispersant comprises petrolatum and/or white oil. The compound agent adopts a low-viscosity system, which is beneficial to the removal of the compound agent and improves the quality of a polymerization product.
In the utility model, the feeding valve is an angle valve and is provided with a remote control device, namely remote electric control, so that the opening degree of the valve is accurately controlled. The angle valve with the structure shown in FIG. 2 is a self-cleaning thimble for eliminating blockage, and can avoid the problems of deposition in the valve, blockage of a filling port and blockage of an outlet. The angle valve employed in the present invention was purchased from Jiangsu Cheng alliance Equipment Limited. The feed angle valve employed in the present invention has the following features: 1. the outlet is designed according to the flow velocity of the materials, and the flow area is gradually transited and narrowed, so that the materials pass through the outlet in an accelerated manner, and the materials are prevented from being blocked at the outlet; 2. a cleaning thimble is arranged at the top of the valve core of the angle valve and can be used for cleaning materials after the materials are blocked; 3. the outlet of the angle valve is provided with a movable device (such as a double-screw machine or a double-rotor) which is arranged in a matching way for stirring, so that the material accumulated at the outlet of the angle valve can be cleaned.
In the present invention, the pipe is a stainless steel pipe. The pipeline is provided with quick interface, makes things convenient for the dismouting, guarantees that the installation does not have dead angle blind spot, satisfies 1 MPa's sealed requirement simultaneously.
In the present invention, the manner of charging the low-viscosity slurry catalyst is a continuous charging manner.
The process for filling the low-viscosity slurry catalyst comprises the steps of metering, preparing, grinding and filling; the metering device adds the solid catalyst and the preparation agent into a preparation tank with stirring through a pipeline; the prepared slurry catalyst enters grinding equipment through a pipeline for circular grinding and then returns to a preparation tank through a pipeline; and the preparation tank is filled into the reaction kettle through a pipeline, a feeding pump, a metering system and a feeding angle valve to finish the filling of the catalyst.
The above-mentioned all parts are connected, and the pipeline angle can not be less than 120 deg.C. The caliber of the pipeline is more than or equal to 15cm and connected by a flange, and the caliber of the pipeline is less than 15cm and connected by a cutting sleeve.
The utility model provides a low-viscosity slurry catalyst filling system which comprises a raw material metering device, a preparation tank, a feeding pump, a low-viscosity slurry catalyst metering unit, a feeding angle valve and a reaction kettle, wherein the raw material metering device, the preparation tank, the feeding pump, the low-viscosity slurry catalyst metering unit, the feeding angle valve and the reaction kettle are sequentially connected; a grinding unit connected with the preparation tank. By adopting the filling system, the problems of sedimentation, uneven concentration and wide catalyst particle size distribution in the slurry catalyst conveying process can be solved, continuous feeding is stabilized, the reaction is ensured to be carried out stably, and the product performance is improved.
Drawings
FIG. 1 is a schematic illustration of a low viscosity slurry catalyst fill system provided by the present invention;
FIG. 2 is a schematic view of the structure of a feed angle valve according to the present invention;
FIG. 3 is a graph of particle size distribution without treatment by a prior art catalyst loading process;
fig. 4 is a graph of the particle size distribution of a catalyst treated by the fill system provided by the present invention.
Detailed Description
To further illustrate the present invention, a low viscosity slurry catalyst injection system provided by the present invention is described in detail below with reference to the examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The filling system shown in fig. 1 is used:
adding a solid catalyst and a compound agent into a preparation tank with a stirring device through a catalyst metering device and a compound solvent metering device respectively through pipelines, feeding the prepared slurry catalyst into a micron grinder through a pipeline for circular grinding, and returning the slurry catalyst into the preparation tank through the pipeline; and the slurry catalyst in the preparation tank is filled into the reaction kettle through a pipeline, a low-viscosity slurry catalyst metering unit and a feeding angle valve to finish the filling of the catalyst.
Table 1 particle size distribution data for catalysts not treated with the fill system of the present invention
Table 2 particle size distribution data for catalysts treated with the fill system of the present invention
From the test data of the particle size before and after the catalyst (see fig. 3 and fig. 4, table 1 and table 2), it can be seen that the catalyst particle size distribution can be narrowed and the particle size can be reduced by the filling system.
From the above embodiments, the present invention provides a low viscosity slurry catalyst filling system, which comprises a raw material metering device, a preparation tank, a feeding pump, a low viscosity slurry catalyst metering unit, a feeding angle valve and a reaction kettle, which are connected in sequence; a grinding unit connected with the preparation tank. By adopting the filling system, the problems of sedimentation, uneven concentration and wide catalyst particle size distribution in the slurry catalyst conveying process can be solved, continuous feeding is stabilized, the reaction is ensured to be carried out stably, and the product performance is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The low-viscosity slurry catalyst filling system is characterized by comprising a raw material metering device, a preparation tank, a feeding pump, a low-viscosity slurry catalyst metering unit, a feeding angle valve and a reaction kettle which are sequentially connected;
a grinding unit connected with the preparation tank.
2. The low viscosity slurry catalyst fill system of claim 1, wherein a cyclic grinding is employed between the grinding unit and the make tank.
3. The low viscosity slurry catalyst fill system of claim 1, wherein the grinding unit comprises a micron-sized grinder.
4. The low viscosity slurry catalyst fill system of claim 1, wherein the feed metering device comprises a catalyst metering device and a built solvent metering device separately connected to a deployment tank.
5. The low viscosity slurry catalyst fill system of claim 1, wherein a stirring device is provided in the preparation tank.
6. The low viscosity slurry catalyst fill system of claim 5, wherein the agitation means is a combination of ribbon agitation and anchor agitation.
7. The low viscosity slurry catalyst fill system of claim 1, wherein the low viscosity slurry catalyst fill is a continuous fill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121092214.8U CN215996578U (en) | 2021-05-20 | 2021-05-20 | Low-viscosity slurry catalyst filling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121092214.8U CN215996578U (en) | 2021-05-20 | 2021-05-20 | Low-viscosity slurry catalyst filling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215996578U true CN215996578U (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121092214.8U Active CN215996578U (en) | 2021-05-20 | 2021-05-20 | Low-viscosity slurry catalyst filling system |
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| Country | Link |
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| CN (1) | CN215996578U (en) |
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2021
- 2021-05-20 CN CN202121092214.8U patent/CN215996578U/en active Active
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