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Multifunctional membrane separation device for treating pulping and paper-making waste water and separation method thereof

A pulp and papermaking and membrane separation technology, applied in semipermeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problem of single structure and function, poor function pertinence, and inability to realize serial and parallel connection between components and processes Operation and other issues to improve experimental efficiency and reduce data errors

Active Publication Date: 2011-01-05
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems that the existing membrane separation device has a single structure and function, cannot realize serial and parallel operation between components and processes, and has poor function pertinence, the present invention provides a method for treating various types of pulping and papermaking wastewater that can be used at the same time. A variety of membrane modules and separation processes that can be freely combined, a multifunctional membrane separation device and separation method that can use chemical cleaning agents or deionized water for chemical cleaning and backwashing

Method used

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  • Multifunctional membrane separation device for treating pulping and paper-making waste water and separation method thereof
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Examples

Experimental program
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Effect test

Embodiment 1

[0026] Using the present invention as figure 1 The multi-functional membrane separation device shown, according to the following steps, the alkaline hydrogen peroxide chemical mechanical pulp (APMP) comprehensive wastewater is sequentially passed through the plate and frame membrane module, the tubular membrane module, the roll membrane module and the hollow fiber membrane module The tandem membrane separation operation:

[0027] 1) The APMP comprehensive wastewater is only pretreated by the coarse filter module 2: inject the APMP comprehensive wastewater to be separated into the liquid inlet tank 1; open the valves V2, V3, V4, V5, V8, and V12, and close the other valves; open the main liquid inlet Pump P1, through adjusting the valve V3 to control the inlet flow to the specified flow; the working time is 5 to 10 minutes.

[0028]2) Plate and frame membrane module 5 (microfiltration), tubular membrane module 7 (ultrafiltration), roll membrane module 9 (nanofiltration) and hol...

Embodiment 2

[0038] Using the present invention as figure 1 The multi-functional membrane separation device shown, according to the following steps, the pulp bleaching comprehensive wastewater is simultaneously separated through parallel membrane modules of plate and frame membrane modules, tubular membrane modules, roll membrane modules and hollow fiber membrane modules:

[0039] 1) The pulp bleaching comprehensive wastewater is only pretreated by the fine filter assembly 3: inject the pulp bleaching comprehensive wastewater to be separated into the liquid inlet tank 1; open the valves V2, V3, V6, V8, V9, V10, close the other valves; open the main The liquid inlet pump P1 controls the liquid inlet flow to the specified flow rate by adjusting the valve V3; the working time is 10 to 15 minutes.

[0040] 2) Parallel operation of plate and frame membrane module 5 (microfiltration), tubular membrane module 7 (ultrafiltration), roll membrane module 9 (nanofiltration) and hollow fiber membrane m...

Embodiment 3

[0050] Using the present invention as figure 1 In the multifunctional membrane separation device shown, the separate membrane separation operation of the plate and frame membrane module is performed on the paint pipeline cleaning wastewater according to the following steps:

[0051] 1) The cleaning wastewater of the paint pipeline is not pretreated: inject the wastewater for cleaning the paint pipeline to be separated into the liquid inlet tank 1; open the valves V2, V3, V6, and V12, and close the other valves; turn on the main liquid inlet pump P1, and adjust the valve V3 controls the liquid flow rate to the specified flow rate; the working time is 1 to 5 minutes.

[0052] 2) The plate and frame membrane module 5 (microfiltration) operates alone: ​​open the valve V15, close the other valves, inject the pretreated wastewater into the storage tank heat exchanger 4 to a specified volume; open the storage tank heat exchanger 4 Temperature sensor switch, adjust the wastewater in ...

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Abstract

The invention relates to a multifunctional membrane separation device for treating pulping and paper-making waste water and a separation method thereof. The device is provided with four groups of membrane assemblies which respectively correspond to four membrane separation processes, wherein each group of membrane assemblies are connected with an inflow pipeline, an outflow pipeline and a circulating backflow pipeline, the inflow pipeline is connected with a blow down pipeline and a chemical washing pipeline, and the outflow pipeline is connected with a backwashing pipeline; different membrane assemblies can be singly used, serially used or used in parallel; each inflow pipeline is connected with a storage pot type heat exchanger to achieve the purpose of simultaneously carrying out temperature regulation and feed buffering; and a pressure sensor is arranged in front of a reverse osmosis membrane assembly for automatically controlling and separating required constant pressure. The device can realize the following working modes: the single working of the membrane assemblies; the serial working of the membrane assemblies; the parallel working of the membrane assemblies; the chemicalwashing of the membrane assemblies; the backwashing of the membrane assemblies; and the blow down of the membrane assemblies. The device can meet the requirement on the membrane separation of variouskinds of pulping and paper-making waste water with different components and properties and has the advantages of high experiment efficiency and small data error.

Description

technical field [0001] The invention relates to a multi-functional membrane separation device, in particular to a device capable of specially treating various types of pulping and papermaking wastewater, equipped with a variety of membrane modules and separation processes that can be freely combined, and capable of using chemical cleaning agents or deionized water for chemical separation. The invention discloses a multifunctional membrane separation device for cleaning and backwashing and a separation method, belonging to the cross technical field of pulping and papermaking and membrane separation technology. Background technique [0002] Membrane separation is the process of separating, fractionating, purifying and enriching two-component or multi-component solutes or solvents using artificially synthesized or natural polymer films, driven by external energy or chemical potential difference. Since Abble Nelkt pioneered the field of membrane process research in 1948, expandi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/58B01D65/02
Inventor 张勇冯文英曹春昱苏振华徐明吕卫军
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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