阅读说明：本技术 烯烃聚合催化剂脱活、聚合物脱挥及脱除灰分的集成设备 (Integrated equipment for olefin polymerization catalyst deactivation, polymer devolatilization and ash removal ) 是由 朱博源 于 2021-08-16 设计创作，主要内容包括：本发明公开了一种烯烃聚合催化剂脱活、聚合物脱挥及脱除灰分的集成设备,其包括外壳,一侧与外壳连接的上盖板,设于外壳内的两组平推流搅拌器及用于驱动平推流搅拌器的驱动电机和齿轮传动机构；两组平推流搅拌器相互平行、叶片相互交合且相向转动,外壳上相对于两组平推流搅拌器内物料推动方向的末端设有出料口；外壳上还设有蒸汽凝液回流口、蒸汽凝液进口及多个低压蒸汽进口；上盖板上设有聚合物进料口及蒸汽夹带的有机挥发组分出口。本发明只用一台集脱活、脱挥、脱灰功能于一体的三合一设备,可大幅度缩小装置的占地面积,节省装置建设的投资、降低生产装置的运行成本、减轻操作人员的劳动强度、减少生产步骤、提高生产效率。(The invention discloses integrated equipment for deactivation of an olefin polymerization catalyst, devolatilization of a polymer and ash removal, which comprises a shell, an upper cover plate, two groups of plug flow stirrers, a driving motor and a gear transmission mechanism, wherein one side of the upper cover plate is connected with the shell; the two groups of horizontal plug flow stirrers are parallel to each other, the blades are mutually jointed and rotate in opposite directions, and a discharge hole is formed in the shell relative to the tail end of the pushing direction of materials in the two groups of horizontal plug flow stirrers; the shell is also provided with a steam condensate return port, a steam condensate inlet and a plurality of low-pressure steam inlets; the upper cover plate is provided with a polymer feed inlet and an organic volatile component outlet carried by steam. The invention only uses a three-in-one device integrating the functions of deactivation, devolatilization and deliming, which can greatly reduce the floor area of the device, save the investment of device construction, reduce the operation cost of the production device, lighten the labor intensity of operators, reduce the production steps and improve the production efficiency.)

1. An integrated device for olefin polymerization catalyst deactivation, polymer devolatilization and ash removal is characterized by comprising a shell (1), an upper cover plate (2) with one side connected with the shell (1), two groups of plug flow stirrers arranged in the shell (1), and a driving motor and a gear transmission mechanism for driving the plug flow stirrers; the two groups of horizontal plug flow stirrers are parallel to each other, the blades are mutually jointed and rotate in opposite directions, and the tail end of the shell (1) relative to the material pushing direction in the two groups of horizontal plug flow stirrers is provided with a discharge hole (1-4); the shell (1) is also provided with a steam condensate return port (1-2), a steam condensate inlet (1-7) and a plurality of low-pressure steam inlets; the upper cover plate (2) is provided with a polymer feed inlet (2-1) and an organic volatile component outlet (2-2) carried by steam.

2. The integrated equipment for olefin polymerization catalyst deactivation, polymer devolatilization and ash removal as claimed in claim 1, wherein said housing (1) is provided with a temperature meter mounting port (1-5) and a pressure meter mounting port (1-3).

3. The integrated apparatus for deactivation of olefin polymerization catalyst, polymer devolatilization and ash removal as claimed in claim 1 or 2, wherein said housing (1) is further provided with spare ports (1-6).

4. The integrated apparatus for deactivation of olefin polymerization catalyst, polymer devolatilization and ash removal as claimed in claim 1, wherein said shell (1) is provided with 3 low-pressure steam inlets disposed on the same horizontal line, respectively disposed with respect to both ends and the middle portion of the plug flow agitator.

5. The integrated apparatus for deactivation of olefin polymerization catalyst, devolatilization of polymer and deashing as claimed in claim 1, wherein said casing (1) is bolted to said upper plate (2).

6. The integrated apparatus for deactivation of olefin polymerization catalyst, devolatilization of polymer and deashing as claimed in claim 1, wherein said casing (1) and said upper cover plate (2) constitute a sealed structure.

7. The integrated apparatus for olefin polymerization catalyst deactivation, polymer devolatilization and ash removal as claimed in claim 1, wherein a plurality of groups of parallel flat-flow stirring blades (3-1) with equal spacing are disposed on the surface of said flat-flow stirrer, and each flat-flow stirring blade (3-1) is uniformly provided with a fluid guide member (3-2).

8. The integrated apparatus for deactivation of olefin polymerization catalyst, polymer devolatilization and ash removal as claimed in claim 7, wherein said plug flow agitating blades (3-1) are annular, spiral or multi-bladed oblique paddles; the fluid guide (3-2) is in a shape of oblique blade, A or S.

Technical Field

The invention relates to a three-in-one device for deactivating residual catalyst, devolatilizing polymer and removing ash in the olefin polymerization process.

Background

In the olefin polymerization process, the polymer powder coming out of the polymerization kettle and subjected to first-stage flash evaporation contains a large amount of polymerization monomers, polymerization solvent and residual catalyst active components (including main catalyst and cocatalyst) which are not deactivated, the traditional method is to use a fluidized bed dryer or a single-stirring shaft horizontal thrust dryer to realize devolatilization by means of a large amount of hot nitrogen introduced, and the drying method has the defects that: firstly, a large amount of nitrogen is consumed, and a considerable part of monomer or solvent cannot be condensed due to the strong promotion of uncondensed nitrogen, so that the waste of raw materials and the increase of the load on a post-treatment system are caused; secondly, the remaining catalyst active components are not deactivated in time at this stage, and the latter system is equipped with special deactivation equipment. Thirdly, the prior art can not solve the problem of deashing of the polymer, thereby affecting the aging resistance and the electrical insulation performance of the polymer.

The current traditional method is as follows: the deactivation and devolatilization equipment are two independent equipment, if the aim of the deashing of the invention is achieved, one deashing equipment is added, the device occupies large area, the investment cost is high, and the operation cost is high.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to integrate equipment for deactivating residual catalyst, devolatilizing polymer and removing ash in the olefin polymerization process into one equipment can finish three extremely important polymer post-treatment works of deactivating residual catalyst, devolatilizing polymer and removing ash in polymer powder in one equipment.

In order to solve the technical problems, the invention provides integrated equipment for deactivation of olefin polymerization catalysts, devolatilization of polymers and ash removal, which comprises a shell, an upper cover plate, two groups of plug flow stirrers, a driving motor and a gear transmission mechanism, wherein one side of the upper cover plate is connected with the shell; the two groups of horizontal plug flow stirrers are parallel to each other, the blades are mutually jointed and rotate in opposite directions, and a discharge hole is formed in the shell relative to the tail end of the pushing direction of materials in the two groups of horizontal plug flow stirrers; the shell is also provided with a steam condensate return port, a steam condensate inlet and a plurality of low-pressure steam inlets; the upper cover plate is provided with a polymer feed inlet and an organic volatile component outlet carried by steam.

Preferably, the shell is provided with a temperature instrument mounting port and a pressure instrument mounting port.

Preferably, the shell is also provided with a spare port.

Preferably, the shell is provided with 3 low-pressure steam inlets which are arranged on the same horizontal line and are respectively arranged relative to the two ends and the middle part of the plug flow stirrer.

Preferably, the housing and the upper cover plate are connected by bolts.

Preferably, the housing and the upper cover plate constitute a sealing structure.

Preferably, a plurality of groups of parallel plug flow stirring blades with equal intervals are arranged on the surface of the plug flow stirrer, and each plug flow stirring blade is uniformly provided with a fluid guide element.

More preferably, the plug flow stirring blade is annular, spiral or multi-blade oblique paddle-shaped; the fluid guide piece is oblique leaf form, A shape or S-shaped, plays the guide effect to the polymerization material flow in the equipment, promotes the contact effect.

The water vapor reacts with the catalyst remained in the polymer to inactivate the catalyst and realize the deactivation function of the catalyst; under the push of the plug flow type stirrer with two plug flow stirring blades which are mutually jointed and run oppositely, polymer powder is smoothly drawn into the lower-layer water phase and fully contacted with the water phase, and inorganic matters generated after the catalyst is deactivated are taken away through fully washing desalted water and steam condensate, so that the ash content of the polymer is greatly reduced, and the function of removing the ash content of the polymer is realized; under a higher operation temperature (the temperature of materials in the system can be completely adjusted through the temperature and the introduction amount of steam), the steam can carry organic volatile components to escape from the top of the equipment (to a condensation system), and the flow rate of the steam is rapidly reduced through controlling the temperature of a condensation heat exchanger, so that the problems that the organic volatile matters carried by the nitrogen are difficult to be fully condensed in a post-condensation system due to the non-condensation of the nitrogen in the traditional devolatilization device, the raw materials are wasted, and the pressure is caused to a tail gas treatment system of the device are solved; the polymer powder containing a large amount of solvent, a small amount of non-condensable gas and a certain amount of catalyst, which is sent from an upstream system, is subjected to deactivation, devolatilization and deashing by the device, and the polymer containing only a certain amount of moisture enters the next unit (generally, a drying unit) from a discharge port.

The invention only uses a three-in-one device integrating the functions of deactivation, devolatilization and deliming, which can greatly reduce the floor area of the device, save the investment of device construction, reduce the operation cost of the production device, lighten the labor intensity of operators, reduce the production steps and improve the production efficiency.

Compared with the prior art, the invention has the beneficial effects that:

firstly, replacing at least three devices in the original process by one special device which gives consideration to catalyst deactivation, polymer devolatilization and ash removal; secondly, nitrogen is not used in the devolatilization, deactivation and deliming processes, low-pressure steam and desalted water are directly used, and the advantages are that: the water vapor is gas which is easy to condense, and the flow velocity of the water vapor can be rapidly reduced by controlling the temperature of the heat exchanger, so that organic volatile components carried in the vapor are condensed in a condenser arranged at the downstream of a gas phase outlet of the three-in-one equipment, and the waste of raw materials and the pressure caused to a tail gas treatment system of the device are reduced; thirdly, the equipment simultaneously realizes three functions of polymer devolatilization, catalyst deactivation and product deashing, can save equipment investment in the construction of the device, reduce the occupied area of the device, reduce the operation energy consumption and cost, lighten the labor intensity of operators, reduce the production steps and improve the production efficiency. Has wide market prospect and application potential in replacing backward productivity, creating green chemical industry and constructing energy-saving and environment-friendly production process.

Drawings

FIGS. 1 and 2 show an integrated apparatus for deactivation of olefin polymerization catalyst, polymer devolatilization and ash removal provided by the present invention;

FIG. 3 is a schematic diagram of a plug flow agitator.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

As shown in fig. 1 and 2, the integrated equipment for olefin polymerization catalyst deactivation, polymer devolatilization and ash removal provided by the present invention comprises a housing 1, an upper cover plate 2 connected with the housing 1 at one side, two sets of plug flow stirrers arranged in the housing 1, and a driving motor and a gear transmission mechanism for driving the plug flow stirrers, wherein a shaft of a first plug flow stirrer 3A penetrates out of the housing 1 and is connected with an output end of a first driving motor 4A through a first gear transmission mechanism 5A, and a shaft of a second plug flow stirrer 3B penetrates out of the housing 1 and is connected with an output end of a second driving motor 4B through a second gear transmission mechanism 5B; the two groups of plug flow stirrers are parallel to each other, and the blades are mutually jointed and rotate oppositely, namely, the rotating directions are opposite.

The tail end of the shell 1, which is opposite to the material pushing direction in the two groups of plug flow stirrers, is provided with a discharge hole 1-4; the shell 1 is also provided with a steam condensate reflux port 1-2, a steam condensate inlet 1-7, a temperature instrument mounting port 1-5, a pressure instrument mounting port 1-3, a standby port 1-6 and 3 low-pressure steam inlets. The 3 low-pressure steam inlets are arranged on the same horizontal line, namely the first low-pressure steam inlet 1-1A, the second low-pressure steam inlet 1-1B and the third low-pressure steam inlet 1-1C are respectively arranged at the input end, the middle part and the output end of the first plug flow stirrer 3A/the second plug flow stirrer 3B.

The shell 1 is connected with the upper cover plate 2 through bolts, and the shell 1 and the upper cover plate 2 form a sealing structure. The upper cover plate 2 is provided with a polymer feed inlet 2-1 and an organic volatile component outlet 2-2 carried by steam.

As shown in fig. 3, a plurality of groups of parallel plug flow stirring blades 3-1 with equal intervals are arranged on the surface of the plug flow stirrer, and fluid guide members 3-2 are uniformly distributed on the circumference of each plug flow stirring blade 3-1. The plug flow stirring blade 3-1 has a ring shape, a spiral shape or a multi-blade oblique paddle shape (a ring shape in this embodiment), and the fluid guide member 3-2 has an oblique paddle shape, an a shape or an S shape (an a shape in this embodiment).

The water vapor reacts with the catalyst remained in the polymer to inactivate the catalyst and realize the deactivation function of the catalyst; under the push of the plug flow type stirrer with two plug flow stirring blades which are mutually jointed and run oppositely, polymer powder is smoothly drawn into the lower-layer water phase and fully contacted with the water phase, and inorganic matters generated after the catalyst is deactivated are taken away through fully washing desalted water and steam condensate, so that the ash content of the polymer is greatly reduced, and the function of removing the ash content of the polymer is realized; under a higher operation temperature (the temperature of materials in the system can be completely adjusted through the temperature and the input amount of steam), the steam can carry organic volatile components to escape from an organic volatile component outlet 2-2 carried by the steam at the top of the equipment (to a condensing system), and the flow rate of water steam is rapidly reduced through controlling the temperature of a condensing heat exchanger, so that the problems that the organic volatile components carried by the nitrogen are difficult to be fully condensed in a post-condensing system due to non-condensation of the nitrogen in the traditional devolatilization device, raw materials are wasted, and the pressure is caused to a tail gas treatment system of the device are solved; the polymer powder containing a large amount of solvent, a small amount of non-condensable gas and a certain amount of catalyst, which is sent from an upstream system, is subjected to deactivation, devolatilization and deashing by the device, and the polymer containing only a certain amount of moisture enters the next unit (generally, a drying unit) from a discharge port 1-4.