CN212017752U - Olefin polymerization device capable of filling solid powder into high-level container - Google Patents

Abstract

The utility model relates to an olefin polymerization technical field discloses an olefin polymerization device that can load solid powder to high-order container, including additive hopper and purification feed bin, the push-pull valve bottom of additive hopper and the rotary valve entrance of purification feed bin install the powder and load the pipeline, and the pipeline ball valve is respectively installed to the powder and loads the pipeline both sides, the additive hopper is connected with the branch ball valve with the lower extreme that the powder loads the tube coupling department, divides the ball valve lower extreme to be connected with extruder feeding hopper. The utility model discloses, the principle that adopts the dilute phase to carry loads the solid powder to the purification feed bin on 70 meters layer, avoids the artifical potential safety hazard that the in-process high altitude construction produced that loads, has improved work efficiency, has also avoided leading to the problem of investment increase because of specially establishing the air-assisted system.

Description

Olefin polymerization device capable of filling solid powder into high-level container

Technical Field

The utility model relates to an olefin polymerization device technical field specifically is an olefin polymerization device that can load solid powder to high-order container.

Background

Polyolefins (e.g., polyethylene) are a series of thermoplastic general-purpose plastics with various structures and characteristics, which can be produced by various processes, and are widely used in the fields of agriculture, heavy industry, light industry and the like. The industrial production of polyethylene is mainly carried out by three methods, namely, a slurry polymerization method, a solution polymerization method and a gas phase polymerization method. Among them, the gas phase polymerization method has many advantages such as simple process flow, large production capacity and strong production flexibility, and thus becomes the mainstream method in the polyethylene process.

The powder filling device of the top bin of the olefin polymerization device extruder adopts a manual filling method, and part of the device is provided with an independent air supply system to complete powder filling. The manual filling needs high-altitude operation, so that the danger is high and the efficiency is low; an independent air supply system is configured, so that the investment is high, the occupied area of the project is increased, and the use frequency is low.

Therefore, there is a need for improvements to existing olefin polymerization plants.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can load the olefin polymerization device of solid powder to high-order container, effectual solution loads the in-process because of the potential safety hazard that high altitude construction produced and because of setting up the problem that special system increased the project investment, reduces the risk of safe operation, improves work efficiency, has reduced the project investment and has taken up an area of to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a can load olefin polymerization device of solid powder to high-order container, includes additive hopper and purification feed bin, the powder filling pipeline is installed with the rotary valve entrance of purification feed bin to the push-pull valve bottom of additive hopper, and the pipeline ball valve is respectively installed to powder filling pipeline both sides, the additive hopper is connected with branch ball valve with the lower extreme that the powder filled the pipeline junction, divides the ball valve lower extreme to be connected with extruder feeding hopper.

As a further aspect of the present invention: and an electric hoist is arranged at the upper end of the additive hopper.

As a further aspect of the present invention: the purification bin is connected with a reversing valve through a rotary valve, and the bottom end of the reversing valve is connected with an extruder feeding hopper.

As a further aspect of the present invention: the bottom end of the reversing valve is also connected with a self-operated pressure reducing valve.

As a further aspect of the present invention: the bottom of the purification bin is also connected with an air conveying line.

Compared with the prior art, the beneficial effects of the utility model are that: the solid powder is filled into the purification bin with the layer of 70 meters by adopting the dilute phase conveying principle, thereby avoiding the potential safety hazard caused by high altitude operation in the manual filling process, improving the working efficiency and avoiding the problem of investment increase caused by specially arranging an air conveying system. The device is applied to the field of filling solid powder into a high-level container in an olefin polymerization device, and has the advantages of wide application range, high efficiency, small investment and obvious application value.

Drawings

FIG. 1 is a schematic view of a prior art olefin polymerization apparatus.

FIG. 2 is a schematic view showing the structure of an olefin polymerization apparatus capable of filling an elevated tank with a solid powder.

In the figure: 1-rotary valve, 2-electric hoist, 3-reversing valve, 4-feeding hopper of extruder, 5-additive hopper, 6-purifying bin, 7-self-operated pressure reducing valve, 8-powder filling pipeline and 9-ball separating valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1 and 2, in an embodiment of the present invention, an olefin polymerization device capable of filling solid powder to a high-level container, includes an additive hopper 5 and a purification bin 6, the bottom of the purification bin 6 is further connected with a pneumatic line, the purification bin 6 is connected with a reversing valve 3 through a rotary valve, the bottom of the reversing valve 3 is further connected with a self-operated pressure reducing valve 7, the bottom of the reversing valve 3 is connected with an extruder feeding hopper 4, the upper end of the additive hopper 5 is provided with an electric hoist 2, a powder filling pipeline 8 is installed at the bottom of a gate valve of the additive hopper 5 and the rotary valve inlet of the purification bin 6, pipeline ball valves are respectively installed at two sides of the powder filling pipeline 8, the lower end of the connection between the additive hopper 5 and the powder filling pipeline 8 is connected with a ball distributing valve 9, and the lower end of the ball distributing.

The utility model discloses a theory of operation is: the olefin polymerization device purifies the feed bin and is located extrusion factory building top steel construction, and feed bin top powder import is located 70 meters layers, and the rotary valve of feed bin bottom export is installed on 10 meters layers, and the feed bin bottom is equipped with a small wind and send the line for the circulation of powder in the feed bin. The bottom of the big bag additive hopper is located in a 23 meter layer and both the additive and the powder enter the extruder hopper, see figure 1.

1. On the basis of the original process flow, a stainless steel pipeline (namely a powder filling pipeline 8) with the pipe diameter of 150mm is newly designed at the bottom of a gate valve of an additive hopper 5 and is connected to the inlet of a rotary valve of a purification bin 6, two ball valves are respectively installed at two sides of the newly connected pipeline, one ball valve is arranged below the newly connected pipeline of the additive hopper 5, and the powder filling flow of the purification bin is optimally designed and is shown in figure 2.

2. The materials required by the design are purchased strictly according to design documents, construction is required to be carried out strictly according to the requirements of the standard GB50184-2011 or GB 50235-.

3. And (3) adding powder into the additive hopper 5, wherein when powder is filled, the solid powder packaged into ton bags needs to be lifted by using an electric hoist to be added into the additive hopper 5.

4. And starting the air feeding line, wherein all valves on the low-pressure nitrogen pipeline are opened to start the air feeding line when powder is filled.

5. Powder is filled, the gate valve at the bottom of the purifying bin 6 is ensured to be in a closed position, the reversing valve 3 is switched to a bypass position (C side), then the ball separating valve 9 is closed, the gate valve at the bottom of the additive hopper 5 and two ball valves on a new filling pipeline are opened, finally the rotary valve is started, and then the solid powder in the additive hopper 5 is conveyed to the purifying bin 6 with 70 m layers.

6. The powder filling process is dilute phase conveying, the pressure of low-pressure nitrogen is not lower than 0.4MPaG, and if the pressure is reduced or the low-pressure nitrogen is interrupted, the powder is retained in a pipeline and finally blockage is caused.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. The utility model provides a can load olefin polymerization device of solid powder to high-order container, includes additive hopper (5) and purification feed bin (6), its characterized in that, powder filling pipeline (8) are installed with the rotary valve entrance of purification feed bin (6) to the push-pull valve bottom of additive hopper (5), and pipeline ball valve is respectively installed to powder filling pipeline (8) both sides, additive hopper (5) and the lower extreme of powder filling pipeline (8) junction are connected with branch ball valve (9), divide ball valve (9) lower extreme to be connected with extruder feeding hopper (4).

2. The apparatus for the polymerization of olefins capable of filling solid powders into elevated vessels according to claim 1, wherein the additive hopper (5) is provided with an electric block (2) at its upper end.

3. The apparatus for the polymerization of olefins capable of feeding solid powders to a high-level container according to claim 1 or 2, wherein the purge bin (6) is connected to a reversing valve (3) through a rotary valve, and the bottom end of the reversing valve (3) is connected to the feeding hopper (4) of the extruder.

4. An apparatus for the polymerization of olefins capable of filling a high-level vessel with a powder solid according to claim 3, wherein a self-operated pressure reducing valve (7) is further connected to the bottom end of the reversing valve (3).

5. The apparatus for the polymerization of olefins capable of filling high-level containers with powders according to claim 3, characterized in that the bottom of the purification silo (6) is also connected with a blowing line.

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