Low-energy-consumption device for producing expanded polystyrene by bulk process

A technology of expanded polystyrene and low energy consumption, applied in chemical/physical/physicochemical fixed reactors, etc., can solve the problems of high energy consumption, many organic and inorganic pollutants, and high labor intensity of batch polymerization process. To achieve the effect of safe and controllable production process, low risk and good environmental protection effect

Pending Publication Date: 2022-07-15
粟中民
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products obtained by this suspension process have some disadvantages, such as: the bead size distribution is very wide, and some oversized and undersized beads need to be sorted and discarded by screening; there are major limitations in the production of special products, such as colored beads and / or containing Microbeads of heterogeneous fillers or additives; nucleating agents and / or flame retardants are difficult to incorporate into the beads, or can inhibit polymerization; since it is carried out in an aqueous medium, a suspending and dispersing agent must be added, which consumes a lot of water, and The water medium contains a lot of organic and inorganic pollutants, which produces a large amount of sewage and has environmental problems; the batch polymerization process also has problems such as high energy consumption, high labor intensity of personnel, and poor product stability.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-energy-consumption device for producing expanded polystyrene by bulk process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is the process flow diagram that this patent implements, and this specific embodiment adopts the following technical solutions:

[0025] The device of this embodiment includes a polymerization reactor (1), a condenser (3), a pump (4), a mixer (5), a plug flow reactor (6), a static mixer (7), and a plug flow reactor (8), the pump (9), the high-pressure underwater pelletizing system (10), the components are connected in sequence with pipes;

[0026] The upper head of the polymerization reaction unit (1) is provided with a material inlet, a reaction stirrer (2) is installed, a condenser (3) is connected, and the lower end is connected with a discharge pump (4).

[0027] When using the above device to produce expanded polystyrene, the material includes the following components by weight:

[0028] 92.5 kg of styrene and 1.5 kg of low molecular weight polyethylene as auxiliary materials were added to the polymerization reactor (1), and the temperature of the mat...

Embodiment 2

[0035] In this embodiment, on the basis of Embodiment 1, a fifth fluid port is added at the inlet of the front end of the static mixer (7). The fifth fluid is flame retardant polystyrene masterbatch, which contains 0.7kg of flame retardant. The fifth fluid flame retardant polystyrene masterbatch is extruded and input into the static mixer (7) at the front inlet of the static mixer (7) with the third fluid polystyrene, and the fourth fluid blowing agent n-pentane and isopentane. Each 3.0kg is fed into the static mixer (7), sheared and mixed evenly, and then enters the plug flow reactor (8), and then is transported by the pump (9) to the high-pressure underwater pelletizing system (10), and is granulated and dried to obtain resistance. Combustible expandable polystyrene pellets. After testing, the oxygen index of flame-retardant expandable polystyrene reaches 32, which meets the requirements of B1-level fire-resistant materials. The data of EPS prepared by this method and the ...

Embodiment 3

[0042] In this embodiment, on the basis of Embodiment 1, a fifth fluid port is added at the inlet of the front end of the static mixer (7). The fifth fluid is a polystyrene masterbatch containing graphite and flame retardant, which contains 2.0 kg of graphite and 0.3 kg of flame retardant. The fifth fluid graphite polystyrene masterbatch is extruded and input into the static mixer (7) at the front inlet, and the third fluid polystyrene and the fourth fluid blowing agent are merged into the static mixer (7) for shearing. After cutting and mixing evenly, it enters the plug flow reactor (8), and is then input into the high-pressure underwater pelletizing system (10) by the pump (9) for granulation and drying into finished graphite-type expanded polystyrene particles. After testing, the oxygen index of flame-retardant expandable polystyrene reaches 32, which meets the requirements of B1-level fire-resistant materials. The comparative analysis of the data of EPS prepared by this m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to view more

Abstract

A low-energy-consumption device for producing expanded polystyrene through a bulk method comprises a polymerization reactor (1), the lower end of the polymerization reactor (1) is connected with a mixer (5) through a discharging pump (4), and then the polymerization reactor (1) is sequentially connected with a plug flow reactor (6), a static mixer (7), a plug flow reactor (8), a pump (9) and a high-pressure underwater pelletizing system (10) through pipelines. When the front end of the mixer (5) is provided with an interface for adding a molten flame retardant master batch, flame-retardant expandable polystyrene (EPS) can be produced; when the front end of the mixer (5) is provided with an interface for adding molten graphite master batches, graphite expandable polystyrene (EPS) can be produced. The size of the obtained expanded polystyrene particles can be strictly controlled between 0.7 mm and 1.0 mm, the expanded polystyrene particles have good impact resistance and tensile strength, and the unit energy consumption is reduced to one third.

Description

technical field [0001] The invention relates to the technical field of expanded polystyrene resin, in particular to a device for producing expanded polystyrene. Background technique [0002] The device for producing expanded polystyrene is a device that produces expanded polystyrene (EPS) from styrene as the main raw material. The existing process produces expanded polystyrene (EPS), which is obtained by a batch polymerization process in suspension, and includes the following steps: using a suspension dispersant to disperse liquid styrene monomer in an aqueous medium, and react with stirring and heating. The polymerization initiator is added to the device to polymerize the styrene monomer; the foaming agent is added at a certain conversion rate of the monomer to complete the polymerization, and then discharged, washed, dried and sieved to obtain the green foamed polystyrene beads. The diameter ranges from 0.1-3mm. The products obtained by this suspension process have some ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18B29B9/06
CPCB01J19/1862B29B9/065
Inventor 粟中民李桂银周治德
Owner 粟中民
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap