CN204699674U - The induction system of polypropylene kind material resin - Google Patents

Abstract

The utility model discloses a polypropylene seed material resin delivery system, which solves the problems of frequent operation, low efficiency, intermittent delivery and the like existing in the traditional seed material resin delivery system. The technical solution includes a product degassing bin, which is sequentially connected with a powder resin hopper, a rotary valve and a reversing valve, and the reversing valve is respectively connected with a product degassing bin and a reactor. The utility model has simple and easy operation, low labor intensity and can realize continuous conveying.

Description

Delivery system for polypropylene seed resin

technical field

The invention relates to a conveying system in the chemical industry, in particular to a conveying system for polypropylene seed material resin.

Background technique

The seed material resin delivery of Unipol polypropylene process is generally realized by a small powder delivery bin. That is, after the powder polypropylene in the product degassing bin flows into the powder delivery bin by gravity, close the feed valve at the top of the delivery bin, then nitrogen enters the powder delivery bin and opens the discharge valve at the bottom of the powder delivery bin, relying on the pressure of nitrogen Convey powder polypropylene to product degassing bin or reactor. When the seed material in each bin is conveyed, it is necessary to open the pressure relief valve on the top of the powder conveying bin to reduce the pressure to a slight positive pressure, then close the pressure relief valve, and then open the feed valve to enter the next conveying process .

It can be seen from the above that it is necessary to switch the feed valve, discharge valve, pressure relief valve and nitrogen intake valve every time a warehouse of powder is transported. The operation process is cumbersome and the labor intensity is too large. Moreover, when the reactor of the new device has not yet produced powdered polypropylene and the extrusion granulator system needs to be fed and tested, the powder needs to be hoisted by a crane to the product degassing bin at a height of about 70 meters above the ground, and then manually unloaded. This requires the use of a large crane to complete, which increases the cost and is labor-intensive.

After investigation, several domestic polypropylene plants using the Unipol process encountered problems such as cumbersome operation process and excessive labor intensity when starting up the new plant to transport seed materials, which brought a lot of inconvenience to the owner's production and operation.

Contents of the invention

The invention provides a conveying system of polypropylene seed material resin which is simple and easy to operate, has low labor intensity and can realize continuous conveying of materials.

The technical solution of the utility model includes a product degassing bin, which is sequentially connected with a powder resin hopper, a rotary valve and a reversing valve, and the reversing valve is respectively connected with a product degassing bin and a reactor.

The bottom of the powder resin hopper is provided with a nitrogen nozzle, and the top is provided with a filter and a manual discharge port.

The reversing valve is also provided with a carrier gas inlet.

The top of the powder resin hopper is also provided with a manual discharge port, and an electric hoist and guide rails are provided outside the manual discharge port for lifting and moving the purchased powder resin to the manual discharge port. When the newly installed reactor has not yet produced polypropylene seed material resin, and the subsequent extrusion granulator needs to be fed and tested first, there is no need to lift the purchased material (powder resin) to a product with a higher vertical height. The gas bin 4 (about 70 meters in height, it is impossible to install an elevator) can be directly sent into the powder resin hopper (about 10 meters in height) through the manual discharge port, thereby greatly reducing labor intensity and construction difficulty.

The powder resin hopper is a normal-pressure container arranged below the product degassing bin, and can receive polypropylene seed material resin (i.e. material) flowing down from the product degassing bin by gravity flow, and the rotary valve can The continuous and uniform discharge of materials from the powder resin hopper replaces the traditional process of pressurized powder feeding into the bin. The bottom of the powder resin hopper is also equipped with a gas flow-assisted nozzle, which can feed the powder to the powder resin hopper. The outlet is sprayed to prevent the material from bridging and blocking here, which affects the continuous discharge. A filter is installed on the top to filter the material carried by the flow-aiding gas when it is discharged. The reversing valve has a steering function, and the outlet has two directions, one leading to the reactor and the other leading to the product degassing chamber to meet the needs of different working conditions. The reversing valve also has a carrier gas inlet, which can be used The carrier gas transports the material downstream.

The utility model can realize continuous feeding, which can be selectively sent to the product degassing bin or reactor according to the needs. It is easy to operate, easy to start or repair, easy to operate, low in labor intensity, safe and reliable in operation.

Description of drawings

Fig. 1 is a system diagram of the utility model.

1-Powder resin hopper, 1.1-Nitrogen nozzle, 1.2-Filter, 1.3-Manual unloading port, 1.4-Electric hoist, 1.5-Guide rail, 2-Rotary valve, 3-Reversing valve, 3.1-Carrier gas inlet , 4-product degassing chamber, 5-reactor.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further explained:

The product degassing bin 4 is sequentially connected with the powder resin hopper 1, the rotary valve 2 and the reversing valve 3, and the reversing valve 3 is connected with the product degassing bin 4 and the reactor 5 respectively. The powder resin hopper 1 is located below the product degassing bin 4, so that the polypropylene seed material resin (i.e. material) in the product degassing bin 4 directly falls into the powder resin hopper 1 by gravity, and the powder resin The bottom of the hopper 1 is provided with a nitrogen flow aid nozzle 1.1, which can be sprayed with nitrogen to purge to prevent material bridging and blockage at the outlet of the powder resin hopper 1; the top of the powder resin hopper 1 is provided with a filter 1.2 to filter the flow aid gas Material entrained during discharge. The top of the powder resin hopper 1 is provided with a manual discharge port 1.3. When the reactor 5 has not yet produced polypropylene seed material resin, use the electric hoist 1.4 and the guide rail 1.5 outside the manual discharge port 1.3 to manually discharge it into the external Purchased polypropylene powder. The reversing valve 3 is also provided with a carrier gas inlet 3.1 for introducing nitrogen gas into the pipeline after the reversing valve 3 as a carrier gas for conveying materials.

working principle:

(1) When normal production needs to store polypropylene seed material resin: the material enters the powder resin hopper 1 from the product degassing bin 4 for storage. When the storage time is too long, in order to prevent the seed material from becoming sticky, open the rotary valve 2, make the reversing valve 3 lead to the product degassing chamber 4, and simultaneously feed nitrogen into the carrier gas inlet 3.1 of the reversing valve 3, use Nitrogen transports the material to the product degassing bin 4 for storage.

(2) When the reactor 5 is restarted after being shut down for maintenance, the reversing valve 3 is connected to the reactor 5, and nitrogen is introduced into the carrier gas inlet 3.1 of the reversing valve 3 at the same time, and the material will be transported to the reactor with nitrogen. stored in device 5.

(3) When the newly installed reactor 5 has not yet produced polypropylene seed material resin, and the subsequent extrusion granulator system needs to be fed and tested first, the lifting device can be used (using the installed elevator for other purposes) Lift the purchased polypropylene seed material resin to the vicinity of the seed material resin hopper 1, then use the electric hoist 1.4 and the guide rail 1.5 to discharge the purchased polypropylene powder into the seed material resin hopper 1 (height within about 10 meters), and then run the system to transport the material to the product degassing bin 4 without lifting the material to the product degassing bin 4 with a higher vertical height (the height is about 70 meters, it is impossible to install an elevator), Thereby reducing labor intensity and construction difficulty.

(4) When the newly installed reactor needs to be fed and tested, the purchased polypropylene seed material resin can be lifted and unloaded into the seed material resin hopper 1 (about 10 meters in height) with the lifting device, and then the system will be operated to transport the material into reactor 5.

Claims (4)

1. an induction system for polypropylene kind material resin, comprises product degassing cabin, it is characterized in that, described product degassing cabin is connected with reversal valve with powder resin hopper, rotary valve successively, and described reversal valve is connected with product degassing cabin and reactor respectively.

2. the induction system of polypropylene kind material resin as claimed in claim 1, it is characterized in that, the top of described powder resin hopper is provided with filter, and bottom is provided with nitrogen and helps flow nozzle.

3. the induction system of polypropylene kind material resin as claimed in claim 1 or 2, it is characterized in that, described reversal valve is also provided with carrier gas and passes into mouth.

4. the induction system of polypropylene kind material resin as claimed in claim 1 or 2, it is characterized in that, the top of described powder resin hopper is also provided with manual cleaning's mouth, and described manual cleaning's mouth peripheral hardware has for being promoted by the powder resin of outsourcing and moving to electric block and the guide rail at manual cleaning's mouth place.