System and method for treating and recycling aged resin wastewater in production process of epoxy resin

A technology of epoxy resin and production process, which is applied in the field of wastewater treatment of epoxy resin production, can solve the problems of low boiling point of composite solvent, low recovery rate of epoxy resin, sticky aging resin, etc., and achieve high utilization rate of water and heat energy , extensive market application prospects, and the effect of reducing emissions

Pending Publication Date: 2019-01-01
山东天茂新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to propose a waste water treatment and recovery system for aging resin in the production process of epoxy resin; the present invention effectively solves the aging problem of toluene treatment by refitting the aging resin device and compounding solvents. The problems of sticky resin and low recovery rate of epoxy resin, and the low boiling point of the composite solvent saves the energy consumption required for distilling solvents, and has economic value and wide market application prospects

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  • System and method for treating and recycling aged resin wastewater in production process of epoxy resin
  • System and method for treating and recycling aged resin wastewater in production process of epoxy resin

Examples

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Effect test

Embodiment 1

[0035] combine figure 1 , figure 2 , an aging resin waste water treatment and recovery system in the epoxy resin production process, comprising an aging resin precipitation compression device 1, an aging resin solvent extraction device 3, wherein the aging resin precipitation compression device includes a precipitation tank 11, a centrifugal pump 12, a screw pump 17, Plate and frame filter press 18, the inlet of the sedimentation tank 11 is connected to the outlet of the centrifugal pump 12 through a pipeline, the inlet of the centrifugal pump 12 is connected to the waste water container 19 through a pipeline, and a flocculant filling pipeline connected to the outlet pipeline of the centrifugal pump is provided, A valve is provided on the flocculant filling pipeline. The flocculant filling pipeline is connected to the polyacrylamide solution container 21, and a metering pump 20 is arranged on the flocculant filling pipeline. The outer clear water outflow pipe 13 is connecte...

Embodiment 2

[0042] combine figure 2 A method for treating and recycling aging resin waste water in an epoxy resin production process, comprising the following steps:

[0043] 1) Put the wastewater into the vertical flow sedimentation tank through the centrifugal pump through the pipeline mixer, and use the prepared polyacrylamide solution as the flocculant through the flocculant filling pipeline connected to the centrifugal pump outlet pipeline through the metering pump The ratio is added to the waste water, the waste water settles in the settling tank, the clear water flows out from the overflow weir of the transfer tank, and the aged resin after settling is discharged to the sludge tank through the discharge port at the bottom of the settling tank, and the sludge tank is pumped by the screw pump The aged resin is transported to the plate and frame filter press, compressed into a filter cake for subsequent processing;

[0044] 2) Solvent extraction process: add solvent to the aged resi...

Embodiment 3

[0060] The wastewater is pumped into the vertical flow sedimentation tank through the pipeline mixer through the centrifugal pump, and a flocculant adding line is added to the outlet pipeline of the centrifugal pump, and the prepared polyacrylamide solution is added to the wastewater in proportion through the metering pump. The waste water settles in the sedimentation tank, and the clear water flows out from the overflow weir of the transfer tank. The aged resin after precipitation is put into the sludge tank at the bottom discharge valve, and is pumped by the screw pump to the plate and frame filter press, and the filter cake is compressed. deal with. Add the aging resin in the sludge tank to the solvent, the ratio is aging resin:solvent = 1:1, the solvent is a mixed solvent of toluene-ethanol at 32:68, turn on the stirring device to fully dissolve at 45°C, continue stirring for 2 hours, divide solution, the precipitate was filtered out, the solution was distilled, and the fi...

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Abstract

The invention discloses a system and a method for treating and recycling aged resin wastewater in a production process of epoxy resin. The system comprises an aged resin precipitating and compressingdevice and a solvent extracting device, wherein the precipitating and compressing device comprises a precipitating tank, a centrifuging pump, a screw pump and a plate-and-frame filter press, wherein the inlet of the precipitating tank is connected with the outlet of the centrifuging pump; the inlet of the centrifuging pump is connected with a wastewater container; a flocculant filling pipeline isarranged on a centrifuging pump outlet pipeline and the flocculant filling pipeline is connected with a polyacrylamide solution container; a metering pump is arranged on the flocculant filling pipeline and the metering pump is connected with the precipitating tank; an overflow weir is arranged at the upper part of the precipitating tank; a clear water outflow pipe on the outer side of the overflowweir is connected with the precipitating tank; a discharging opening in the bottom of the precipitating tank is connected with a sludge tank through a discharging pipe; one side of the screw pump isconnected with the sludge tank through a pipeline; the other side of the screw pump is connected with the plate-and-frame filter press. According to the system and the method for treating and recycling the aged resin wastewater in the production process of epoxy resin, the aged resin wastewater is treated in the solvent extracting device by using a solvent extracting process; the problems that theaged resin treated by methylbenzene is viscous and the recycling rate of the epoxy resin is low are solved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment in epoxy resin production, in particular to a system and method for treating and recycling aging resin wastewater in the epoxy resin production process. Background technique [0002] Epoxy resin is a kind of bisphenol A diglycidyl ether produced by bisphenol A and epichlorohydrin under the condition of basic catalyst. During the production and washing process, aging resin will be precipitated. The solvent toluene of oxygen resin is used to extract epoxy resin from aging resin wastewater. The color of the extracted epoxy resin is yellow, the aging resin is sticky, and the recovery rate of epoxy resin is low and the energy consumption is high. Contents of the invention [0003] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to propose a waste water treatment and recovery system for aging resin in the production process of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F11/12C02F11/00
CPCC02F1/56C02F11/00C02F11/121C02F2001/007
Inventor 李文泉李冉
Owner 山东天茂新材料科技股份有限公司
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