Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Condensation and adsorption type formaldehyde recycling device applied to artificial board manufacturing industry and recycling method

A technology for manufacturing industries and recycling devices, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of high operating costs, insufficient energy saving, and high failure rate of vacuum pressure swing adsorption, and achieve higher energy efficiency ratios and higher The effect of recycling efficiency, cost and failure rate reduction

Inactive Publication Date: 2015-08-19
NANJING DOULE REFRIGERATION EQUIP
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The past condensation plus adsorption method is atmospheric pressure condensation plus adsorption, mostly because of the low concentration of formaldehyde, which is not energy-saving enough, resulting in high operating costs and high failure rate of vacuum pressure swing adsorption

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
  • Condensation and adsorption type formaldehyde recycling device applied to artificial board manufacturing industry and recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: as figure 1 As shown, the condensation and adsorption type formaldehyde recovery device for the wood-based panel manufacturing industry described in this embodiment includes a semi-hermetic piston compressor 10, an air storage tank 11, two groups of adsorption units, a pneumatic valve 8 for circulation, a refrigeration circuit, Liquid storage tank 9, control cabinet 12; refrigeration circuit is composed of semi-hermetic screw refrigeration compressor 1, oil separator 2, water-cooled condenser 3, electronic expansion valve 4 and plate-fin evaporator 5; the first group of adsorption units includes Adsorption tank A 6, intake valve A 601, analytical valve A 602, air outlet valve A 603, the outlet of the formaldehyde channel of the plate-fin evaporator 5 is connected to the air inlet at the bottom of the adsorption tank A 6 through the intake valve A 601 , the gas outlet at the top of the adsorption tank A6 is connected to the clean gas discharge port through ...

Embodiment 2

[0031] Embodiment 2: The structure is basically the same as that of Embodiment 1, and the similarities will not be described again. The difference is that the pressurization passage also includes a control cabinet 12, and the control cabinet 12 is respectively connected to the air storage tank 11. The pressure sensor 13 of the semi-hermetic piston compressor 10 is electrically connected to the temperature sensor 14; the control cabinet 12 is also electrically connected to the bypass valve of the semi-hermetic piston compressor 10.

Embodiment 3

[0032]Embodiment 3: the recovery method of the condensate-adsorption type formaldehyde recovery device used in the wood-based panel manufacturing industry, comprising the following steps: 1. pressurized treatment step: formaldehyde gas enters the semi-hermetic piston compressor through the waste gas inlet, passes through the semi-closed The piston compressor is compressed into formaldehyde gas with a pressure of 0.7~0.8MPa;

[0033] ②Low-temperature condensation step: The pressurized formaldehyde gas passes through the gas storage tank and enters the plate-fin evaporator, and at the same time performs heat exchange treatment with the refrigerant flowing through the plate-fin evaporator. After being circulated and cooled by the refrigeration circuit, 90% ~95% of the formaldehyde gas is cooled to a liquid state, and is recovered by a liquid storage tank connected to the liquid outlet of the formaldehyde channel at the bottom of the plate-fin evaporator; the pressure of the formal...

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 provides a condensation and adsorption type formaldehyde recycling device applied to the artificial board manufacturing industry and a recycling method, which aim to solve the problems that the existing condensation and adsorption type formaldehyde recycling device is low in energy efficiency and high in operation cost in an artificial board manufacturing process. The condensation and adsorption type formaldehyde recycling device comprises a refrigeration loop, a pressurizing passage, an adsorption treatment passage, an enriched gas circulating pipeline and a liquid storage tank. According to the condensation and adsorption type formaldehyde recycling device applied to the artificial board manufacturing industry and the recycling method, formaldehyde is compressed by a semi-closed piston type compressor and then enters a plate-fin type evaporator of the refrigeration loop to be liquefied, the liquefied formaldehyde enters the adsorption treatment passage when the medium pressure is controlled, and the formaldehyde is analyzed under normal pressure; the analyzed enriched formaldehyde returns to an air inlet of the semi-closed piston type compressor to be recycled. Therefore, the recycling efficiency is largely improved, and the initial investment and the operation cost of the recycling device are largely reduced.

Description

technical field [0001] The invention relates to a formaldehyde recovery device and a recovery method, in particular to a condensation plus adsorption type formaldehyde recovery device and recovery method for the wood-based panel manufacturing industry. Background technique [0002] Urea-formaldehyde, phenol-formaldehyde and melamine-formaldehyde resins are widely used as adhesives in the manufacturing process of wood-based panels, among which urea-formaldehyde resin is the most widely used, which is formed by condensation of urea and formaldehyde, and a large amount of free formaldehyde will escape during the process of manufacturing and gluing. As a result, a large amount of organic waste gas such as formaldehyde is emitted. Formaldehyde treatment methods commonly used in the past mainly include: catalytic oxidation, adsorption, membrane separation, condensation, etc. The past condensation plus adsorption method is atmospheric pressure condensation plus adsorption, which i...

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): B01D53/04B01D53/00
Inventor 朱志平缪志华张林张贵德孙罡张剑侠
Owner NANJING DOULE REFRIGERATION EQUIP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com