Unlock instant, AI-driven research and patent intelligence for your innovation.

Industrialized pure PU foam alcoholysis recovery method and special recovery feeding device

The technology of a feeding device and a recycling method is applied in the field of industrial pure PU foam alcoholysis recovery and special recycling feeding device, which can solve the problems of high polyol VOC index and slow recycling and feeding, and achieve accurate feeding and improve quality. , The effect of increasing the feeding speed

Active Publication Date: 2019-02-12
YANTAI ZHENGHAI HIGH TECH
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention mainly solves the problems of slow recycling of existing industrialized pure PU foam and high VOC index of polyols.

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
  • Industrialized pure PU foam alcoholysis recovery method and special recovery feeding device
  • Industrialized pure PU foam alcoholysis recovery method and special recovery feeding device
  • Industrialized pure PU foam alcoholysis recovery method and special recovery feeding device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1, see figure 1 , 2 3. According to the design requirements, select the weighing bin 9 and the screw conveyor 10 of appropriate specifications, both of which are conventional equipment, and connect the two; connect the screw conveyor 10 with the feed funnel 6 through the soft connection 7 Auxiliary feed double-screw feed conveyor 5 is installed at the lower end of feeding funnel 6, and auxiliary feed double-screw feed conveyor 5 is delayed compared to screw conveyor 10; The main feeding screw conveyor 4 is connected, the main feeding screw conveyor 4 is connected with the feeding variable diameter elbow 3, the diameter of the interface between the two is Φ200, the inner wall of the feeding variable diameter elbow 3 is polished and sprayed with Teflon coating layer, the surface energy of the inner wall is lower than 20dyn / cm; the feed reducing elbow 3 is communicated with the reactor 1 through the pneumatic gate valve 2, and the interface between the feed reduci...

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

No PUM Login to View More

Abstract

The invention discloses an industrialized pure PU foam alcoholysis recovery method and a special recovery feeding device. The special recovery feeding device is characterized by comprising a reactionkettle, a pneumatic gate valve, a feeding reducing elbow, a main feeding screw rod conveyor, an auxiliary feeding double helix feeding conveyor, a feeding hopper, a flexible connector and a small material feeding device for catalysts, formamine, oxyful and the like. The alcoholysis recovery method comprises the steps of feeding, alcoholysis and recovery. The feeding speed is high; the feeding is precise; the proportion of the PU foam feeding mass to the added main recovery alcoholysis agent mass is enabled to be stable; the catalysts, the formamine and the oxyful can be timely added into a reaction system according to the process requirements, so that each control index of each bath of recovered polylol is stable. The pure PU foam feeding mode and the recovery process are combined; the recovered polylol with stable performance, low water content and low VOC indexes can be produced.

Description

Technical field: [0001] The invention relates to the technical field of alcoholysis recovery of pure PU foam waste leftovers, in particular to an industrialized pure PU foam alcoholysis recovery method and a special recycling feeding device; the invention can improve the yield of pure PU foam required for alcoholysis Feed speed, reduce VOC index of recovered polyols. Background technique: [0002] In the production process of PU products such as automotive interior ceilings, refrigerators, cold storage insulation, and building exterior wall insulation, a large amount of PU foam scraps will be generated. The disposal of these wastes has not been well resolved. [0003] PU foam corner waste has a small density and a large footprint, and it is difficult to decompose naturally under normal temperature and pressure conditions. Currently commonly used treatment methods include landfill, incineration, and physical crushing and rebonding recycling. The waste is disposed of by land...

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
IPC IPC(8): C08J11/24C08L75/04
CPCC08J11/24C08J2375/04Y02W30/62Y02P20/584
Inventor 王国淑郭焕祥李海帆许林吕道湖
Owner YANTAI ZHENGHAI HIGH TECH