CN205856491U - Saccharified liquid membrane filtration system - Google Patents

Abstract

This utility model relates to saccharified liquid membrane filtration system, it is connected between coarse filtration system and ion exchange system, including membrane filter unit, membrane filter unit includes the first film filter, first film filter is ultrafilter membrane, for separating the macromolecular substances in sugar liquid and small-molecule substance, sugar liquid is after described saccharifying membrane filtration system separates, and small-molecule substance enters ion exchange system.This saccharified liquid membrane filtration system; sugar liquid before being passed through ion exchange resin can be filtered by further; the macromolecular substances in sugar liquid and small-molecule substance can be efficiently separated so that being passed through the sugar liquid molecular weight of ion exchange, sugar liquid is purer; can not only effectively protect ion-exchange unit; extend its service life, reduce the consumption of adjuvant in follow-up workshop section, cost-effective; and be effectively improved work efficiency, and improve the quality of each workshop section sugar liquid.

Description

Saccharified liquid membrane filtration system

Technical field

This utility model relates to field of starch sugar production, particularly to saccharified liquid membrane filtration system.

Background technology

In starch sugar production technology, after starch milk liquefaction, liquefier i.e. enters saccharifying workshop section.Mashing process is first will liquefaction Liquid regulates pH and temperature, adds glucoamylase enzyme glycolysis saccharogenesis liquid.When in sugar liquid, glucose content reaches more than 95% Time, saccharifying can be terminated, after coarse filtration, carry out the workshop sections such as Glucose Liquid ion exchange, decolorization filtering successively.

Coarse filtration after saccharifying terminates uses vacuum-type drum filter to carry out, and mainly utilizes filter cloth Attached diatom soil to enter Row filters.The purpose of coarse filtration is to filter the impurity such as albumen in former saccharified liquid, fiber.In coarse filtration, the minimum of filter cloth filters grain Footpath is 0.5um, therefore still has the little granule of below 0.5um in the sugar liquid after filtering.

Ion exchanges in workshop section, sugar liquid is completed by ion-exchange unit.Ion-exchange unit is used Ion exchange resin is mainly configured to by high-molecular bone, for the granule of the high molecular polymer composition of crosslinking.Granule exists very Porous, is such as present in the gel pore within macromolecular structure, and the pore being present between macromolecular structure, gel pore Or the particle diameter of pore is the least, for below 0.5um.

So the sugar liquid after coarse filtration, if be passed directly in ion-exchange unit, the little granule of residual in sugar liquid Hole in meeting plug ion exchanger resin, and cannot clean out.In the course of time, the hole of ion exchange resin is constantly blocked, Not only can affect the work efficiency of ion exchange resin, also can affect the service life of ion exchange resin.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of saccharified liquid membrane filtration system, and it can be to being passed through ion Sugar liquid before exchanger resin filters further, can efficiently separate the macromolecular substances in sugar liquid and small-molecule substance, make Must be passed through the sugar liquid molecular weight of ion exchange, sugar liquid is purer.

For solving the problems referred to above, this utility model provides a kind of saccharified liquid membrane filtration system, and it is connected at coarse filtration system Between system and ion exchange system, including membrane filter unit, described membrane filter unit includes the first film filter, described first film Filter is ultrafilter membrane, and for separating the macromolecular substances in sugar liquid and small-molecule substance, sugar liquid is through described saccharifying membrane filtration After system separates, small-molecule substance enters ion exchange system.

It also includes the membrane filtration feed pump being connected with described membrane filter unit, and described membrane filtration feed pump is for pumping into sugar liquid In described membrane filter unit.

Further, described membrane filter unit also includes the first surge tank being connected with described first film filter, described Pressure when first surge tank is for stablizing the first film filter feed liquor.

Further, described membrane filter unit also includes the film concentrated phase tank that one end is connected, institute with described first film filter State film concentrated phase tank for collecting the macromolecular substances after the first film filter filters.

Further, the described film concentrated phase tank other end is connected with described coarse filtration system, for being returned by macromolecular substances Coarse filtration system carries out coarse filtration again.

Further, described membrane filter unit also includes the second surge tank and the second film filter being sequentially connected with, described Second film filter is ultrafilter membrane, after described second surge tank and described second film filter connect, is sequentially connected with described First film filter and the first surge tank are for being arranged in parallel.

Further, described second film filter is connected with described film concentrated phase tank.

Further, it also includes tank before the membrane filtration that one end is connected with described membrane filtration feed pump, before described membrane filtration tank another End is connected with described coarse filtration system, and before described membrane filtration, tank can be set up in parallel one or more.

Further, it also includes the Membrane cleaning device being connected with described membrane filter unit, and described Membrane cleaning device passes through Membrane filter unit is carried out by cleanout fluid.

Further, described Membrane cleaning device also includes the heat exchanger for heated wash liquid.

Ultrafilter membrane (UF), is a kind of membrane process between microfiltration and nanofiltration, is that a kind of aperture specification is consistent, specified hole Footpath scope is the micropore filtering film of below 0.01um.Ultrafilter membrane utilizes screening principle to separate solution, and it is to organic Molecular cut off is optional from 3000～300000Dalton, it is adaptable to macromolecular substances separates with small-molecule substance, concentrates and pure Change process.Generally, molecular weight is become macromolecular particle more than 1000Dalton, the particle diameter granule more than 10nm by us, is less than The granule of these numerical value is referred to as little molecule particles.

When carrying out ultrafiltration, impose suitable pressure in the side of ultrafilter membrane, just can sift out the solute molecule less than aperture, pass through Film entrance opposite side, and macromolecular particle, then stay the side of film.

In starch sugar production technology, in ultra-filtration process, sugar liquid, under pressure promotes, flows through film surface, less than fenestra Solvent (water) and little molecule solute through film, become scavenging solution, the impurity bigger than fenestra is trapped, and discharges with current, becomes Concentrated solution.Ultra-filtration process is dynamic filtration, and separation completes under flow regime.Solute, impurity are only limited heavy on film surface Long-pending, ultrafiltration rate decays to a certain degree tend to balance, it is necessary to just can recover by cleaning.

The beneficial effects of the utility model:

Saccharified liquid membrane filtration system in the present invention, the sugar liquid being passed through before ion exchange resin can be carried out further by it Filter, the macromolecular substances in sugar liquid and small-molecule substance can be efficiently separated so that be passed through the sugar liquid molecular weight of ion exchange relatively Little, sugar liquid is purer, can not only effectively protect ion-exchange unit, extend its service life, reduces adjuvant in follow-up workshop section Consumption, cost-effective, and it is effectively improved work efficiency, and improve the quality of each workshop section sugar liquid.

Accompanying drawing explanation

Fig. 1 is the structural representation of the saccharified liquid membrane filtration system in this utility model embodiment.

Detailed description of the invention:

Embodiment: as it is shown in figure 1, this utility model provides saccharified liquid membrane filtration system, it is connected at coarse filtration system Between (figure has no) and ion exchange system (figure has no), for separating the macromolecular substances part sugar liquid (letter below in sugar liquid Claim macromolecular substances) and small-molecule substance part sugar liquid (hereinafter referred to as small-molecule substance).This saccharified liquid membrane filtration system separates The macromolecular substances gone out can return in coarse filtration system, jointly carries out coarse filtration with new saccharified liquid, then reenters saccharifying Liquid film filtration system separates, and small-molecule substance, then enter ion exchange system, after carrying out ion exchange, enter downstream work Sequence.It is arranged such, reaches to purify the purpose of sugar liquid by filtering macromolecular substances, sugar liquid can be avoided to carry out ion exchange Time, the endoporus of macromolecular substances plug ion exchanger resin granule, and improve the quality of sugar liquid in follow-up workshop section.

This saccharified liquid membrane filtration system includes collecting tank 1 before the membrane filtration discharging sugar liquid from coarse filtration system, this production work In skill, the size that before membrane filtration, tank 1 is appropriate isThe preferred model of material is the rustless steel of 304L, to reach food Sanitation-grade requirement in product production.Before membrane filtration, tank 1 could be arranged to one, it is also possible to be parallel with one another two or two with On, can make adjustment according to volume of production.In the present embodiment, before membrane filtration, tank 1 arranges two, when one for use state, another Individual for resting state, it is simple to later maintenance.

This saccharified liquid membrane filtration system also include membrane filter unit 2, membrane filter unit 2 include the first film filter 212 with And it is connected at the first surge tank 211 of the first film filter 212 front end.With the first surge tank 211 and first being sequentially connected with Film filter 212 is one group of membrane filtration group, and membrane filter unit can also only arrange the membrane filtration group that many groups are identical, to increase sugar liquid Treating capacity, and be easy to later maintenance.Membrane filter unit 2 also includes the second surge tank 221 and the second membrane filtration being sequentially connected with After device 222, the second surge tank 221 and the second film filter 222 connect, with the first film filter 212 and first being sequentially connected with Surge tank 211 is for being arranged in parallel.In the present embodiment, also set up interconnective 3rd surge tank 231 and tertiary membrane filter 232, interconnective 4th surge tank 241 and the 4th film filter 242, interconnective 5th surge tank 251 and the 5th film Filter 252, totally five groups of membrane filtration groups, and each film filter all uses ultrafilter membrane, by ultrafilter membrane, can enter sugar liquid simultaneously Row efficiently separates.

The ultrafilter membrane certain pressure of needs could promote sugar liquid to flow through film surface and filter, therefore, and this saccharifying liquid film mistake Filter system also needs to arrange the membrane filtration feed pump 3 being connected with membrane filter unit 2, for sugar liquid is pumped in membrane filter unit 2, and There is provided certain pressure, to promote the filtration of sugar liquid.Therefore, membrane filtration feed pump 3 one end is connected with coarse filtration system, the other end and film First surge tank the 211, second surge tank the 221, the 3rd surge tank the 231, the 4th surge tank 241 and the 5th buffering of filter element 2 Tank 251 is all connected with.Therefore, in first group of membrane filtration group, the first set surge tank 211 cannot be only used for collecting sugar liquid, more Membrane filtration feed pump 3 can be coordinated, stablize pressure during the first film filter 212 feed liquor.

This saccharified liquid membrane filtration system also includes the film concentrated phase tank 4 being connected at after membrane filter unit 2, is used for collecting warp Cross isolated macromolecular substances after membrane filter unit 2 filters, and macromolecular substances can return to coarse filtration system and new sugar Again carrying out coarse filtration after liquid mixing, therefore film concentrated phase tank 4 one end is all connected with each film filter, the other end and coarse filtration System connects.And, film concentrated phase relay pump 5 is set between film concentrated phase tank and coarse filtration system, by film concentrated phase relay pump 5, can Macromolecular substances is squeezed into coarse filtration system, jointly carries out coarse filtration with new saccharified liquid, the most repeatedly, sugar liquid can not only be improved Quality, more can economize in raw materials, reduce production cost.Film concentrated phase tank 4 uses model to be the stainless steel storage tank of 304L equally, to reach Sanitation-grade requirement in food production.

This saccharified liquid membrane filtration system also includes the Membrane cleaning device 6 being connected with membrane filter unit, and Membrane cleaning device 6 uses Membrane filter unit 2 is carried out by cleanout fluid.Because ultrafilter membrane is to carry out filtering with the pressure differential of film both sides for driving force, point Complete under flow regime.Macromolecular substances is only in the limited deposition in film surface, when the filtration through the long period, film table The micropore in face can be blocked by some large particulate matters, and the ultrafiltration rate moment is all decaying, when decaying to a certain degree tend to flat During weighing apparatus, now the pressure of membranous system is increased to limit value, and when discharging flow reduces, it is necessary to film is carried out, regenerates, with extensive The strainability of laminating adhesive, therefore must be provided with this Membrane cleaning device 6.Membrane cleaning device 6 is provided with filter washing water inlet 61, for cleanout fluid Be passed through.

General, Membrane cleaning device 6 also includes the heat exchanger 62 for heated wash liquid, for adding cleanout fluid Heat, to coordinate the cleaning temperature requirement of ultrafilter membrane.In the present embodiment, in order to coordinate the operational characteristic of starch sugar, use board-like changing Cleanout fluid is heated by hot device 62, i.e. plate type heat exchanger one end is connected with filter washing water inlet 61, the other end and and membrane filtration Unit 2 connects, and is carried out with the ultrafilter membrane in membrane filter unit 2.Plate type heat exchanger 62 can effectively utilize other operation to produce Raw hot water, thus reach hot water recycling principle, to reduce production cost further.

When specifically filtering, saccharified liquid squeezes into tank 1 before membrane filtration, squeezes into membrane filter unit 2 by membrane filtration feed pump 3.During filtration, Utilize the pressure of membrane filtration feed pump 3, make saccharified liquid enter film filter, macromolecular substances is filtered out, reach to purify sugar liquid Purpose, it is to avoid cause subsequent ion to exchange the blocking of workshop section's ion exchange resin.During ultrafiltration membrance filter, because the stream of sugar liquid Dynamic so that during filtration, sugar liquid is internal is cross-current flow, produce so some containing the sugar liquid that macromolecular substances is more, i.e. film Concentrated phase, this part film concentrated phase is collected in film concentrated phase tank 4, is returned in coarse filtration system afterwards, after mixing with new saccharified liquid Reenter membrane filtration system.And by the small-molecule substance of ultrafilter membrane, then enter subsequent processing ion exchange system.Whole In individual starch sugar technique, by increase saccharifying membrane filtration system, can not only effectively prevent ion exchange resin blocked, extend from In the service life of sub-exchange resin, improve the quality of product especially, and improve the utilization rate of raw material.

The above is preferred implementation of the present utility model, it is noted that for the ordinary skill of the art For personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and profit Decorations are also considered as protection domain of the present utility model.

Claims (10)

1. saccharified liquid membrane filtration system, it is characterised in that: it is connected between coarse filtration system and ion exchange system, including Membrane filter unit, described membrane filter unit includes the first film filter, and described first film filter is ultrafilter membrane, is used for separating sugar Macromolecular substances in liquid and small-molecule substance, sugar liquid is after described saccharifying membrane filtration system separates, and small-molecule substance enters Ion exchange system.

Saccharified liquid membrane filtration system the most according to claim 1, is characterized by: it also includes with described membrane filter unit even The membrane filtration feed pump connect, described membrane filtration feed pump is for pumping into sugar liquid in described membrane filter unit.

Saccharified liquid membrane filtration system the most according to claim 1, is characterized by: described membrane filter unit also includes with described The first surge tank that first film filter connects, pressure when described first surge tank is for stablizing the first film filter feed liquor.

Saccharified liquid membrane filtration system the most according to claim 3, is characterized by: described membrane filter unit also include one end with The film concentrated phase tank that described first film filter connects, described film concentrated phase tank is for collecting the macromole after the first film filter filters Material.

Saccharified liquid membrane filtration system the most according to claim 4, is characterized by: the described film concentrated phase tank other end with described slightly Filtration system connects, and again carries out coarse filtration for macromolecular substances is returned coarse filtration system.

Saccharified liquid membrane filtration system the most according to claim 4, is characterized by: described membrane filter unit also includes connecting successively The second surge tank connect and the second film filter, described second film filter is ultrafilter membrane, described second surge tank and described After two film filters connect, with described the first film filter being sequentially connected with and the first surge tank for being arranged in parallel.

Saccharified liquid membrane filtration system the most according to claim 6, is characterized by: described second film filter is dense with described film Phase tank connects.

Saccharified liquid membrane filtration system the most according to claim 2, is characterized by: it also includes that one end feeds with described membrane filtration Tank before the membrane filtration that pump connects, before described membrane filtration, the tank other end is connected with described coarse filtration system, and before described membrane filtration, tank can be Be set up in parallel is one or more.

Saccharified liquid membrane filtration system the most according to claim 1, is characterized by: it also includes with described membrane filter unit even The Membrane cleaning device connect, membrane filter unit is carried out by described Membrane cleaning device by cleanout fluid.

Saccharified liquid membrane filtration system the most according to claim 9, is characterized by: described Membrane cleaning device also include for The heat exchanger of heated wash liquid.