CN101367592A

CN101367592A - Method for soda recovery and color removal after mercerization in dyeing and printing field and apparatus thereof

Info

Publication number: CN101367592A
Application number: CNA2008101402463A
Authority: CN
Inventors: 陈明; 张建祥; 吕文泉; 于永彬; 侯大勇
Original assignee: Luthai Textile Co Ltd
Current assignee: Luthai Textile Co Ltd
Priority date: 2008-09-19
Filing date: 2008-09-19
Publication date: 2009-02-18

Abstract

The invention provides a mercerization alkali recovery and color removing method and the device in dyeing field. The invention is characterized in that the method comprises the following steps: (1) filtering, (2) evaporating, (3) color removing and (4) filtering. In the color removing step, hydrogen peroxide is sprayed into a container with alkali liquid through a jet pump, and at the same time, an aeration pipe is equipped to accelerate the reaction until the alkali liquid becomes clear without any color. The device comprises a plurality of filters, a plurality of evaporators, a container for accommodating the filtered and condensed alkali liquid, a jet pump for spraying the hydrogen peroxide into the container, an aeration pipe for accelerating the reaction and a filter for removing the impurity in the liquid. Each of the evaporator is provided with a fluid level gauge and a proportional valve controlled by the evaporator. After the mercerization alkali liquid is filtered by the filters and condensed by the evaporator, the alkali liquid is stored in the container. The outlet of the jet pump is communicated with the container. The aeration pipe is emerged into the alkali liquid. The outlet of the container is provided with the filter. After the alkali is transferred into the colorless and clear alkali liquid, the alkali can be directly reused, and therefore the source can be saved.

Description

Look alkali reclaims, removes the method and the device thereof of look behind the field of printing and dyeing mercerising

Technical field

The invention provides that look alkali reclaims behind a kind of field of printing and dyeing mercerising, remove the method and the device thereof of look, belong to technical field of textile printing.

Background technology

In the gloss finish process in dyeing, must consume a large amount of liquid caustic soda, also just produce a large amount of spent caustic solutions simultaneously.Because these spent caustic solutions have color, so fail to reclaim always, cause in follow-up sewage treatment process, need to consume a large amount of sulfuric acid, not only contaminate environment but also cause the waste of resource.

Summary of the invention

The purpose of this invention is to provide and a kind ofly address the above problem, improve resource utilization, reduce method and device thereof that look alkali behind the field of printing and dyeing mercerising of blowdown flow rate reclaimed, removed look.Its technical scheme is:

Look alkali reclaims, removes the method for look behind a kind of field of printing and dyeing mercerising, it is characterized in that comprising the steps: that filter (1), evaporate (2), (3) remove look, filter (4), wherein in removing the look step, by spraying into hydrogen peroxide in the look alkali lye of squirt pump in container, be equipped with the aeration tube accelerated reaction simultaneously, colourless until the clarification of look alkaline solution.

Look alkali reclaims and removes color method behind the described field of printing and dyeing mercerising, and the alkaline solution of checking colors in the step (1) adopts cascade filtration.

Look alkali reclaims and removes color method behind the described field of printing and dyeing mercerising, and the alkaline solution of checking colors in the step (2) adopts multistage evaporation to concentrate.

Look alkali reclaims behind the described realization field of printing and dyeing mercerising, remove the method equipment therefor of look, comprise a plurality of strainers, a plurality of vaporizers, hold the container of the look alkaline solution after the filtering and concentrating, in container, spray into the squirt pump of hydrogen peroxide, the aeration tube of accelerated reaction and remove dereaction after the strainer of solution impurity, wherein be equipped with liquidometer on each vaporizer and by the proportional valve of its control, the look alkaline solution filters through filter and vaporizer leaves in the container after concentrated successively behind the mercerising, spraying pump outlet is communicated with container, aeration tube is immersed in the look alkaline solution, and the outlet of container place connects strainer.

The present invention compared with prior art has following advantage:

1, cascade filtration: adopt the more traditional intermittent type single-stage strainer of multistage continuous filter to filter thoroughly, ensured the cleanliness factor that reclaims weak lye, reduced fouling odds in the subsequent evaporation process, ensured the continuity of producing;

2, multistage evaporation: adopt multistage evaporation to ensure the continuity of producing, and have only the first step to use live steam, the multipotency consumption is low more more for progression, produces stable;

3, remove look: utilize hydrogen peroxide strong oxidation bleaching effect under alkaline condition, eliminate colourity, realized the real recycling of band look liquid caustic soda, provide solution for the look alkali of textile printing and dyeing industry reclaims;

4, filter: effectively removed at look alkali and removed the foreign material that produce in the look process, ensured the purity that reclaims liquid caustic soda;

5, the present invention is converted to achromaticity and clarification alkali lye with look alkali, but direct reuse has been saved the energy, has reduced cost of sewage disposal and to the pollution of environment, has improved the utilization ratio of resource, has reduced blowdown flow rate.。

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention.

Among the figure: 1, strainer 2, vaporizer 3, container 4, squirt pump 5, aeration tube 6, strainer 7, liquidometer 8, proportional valve 9, filtering net

Embodiment

In the embodiment shown in fig. 1: contain 3

strainers

1 and 2 vaporizers in this device.3 strainers 1 are according to filtering accuracy suitable rate from low to high linear arrangement successively, joining end to end of adjacent filter 1, the outlet that is positioned at terminal strainer 1 connects first vaporizer 2, the outlet of this vaporizer 2 connects second vaporizer 2, and be equipped with liquidometer 7 on above-mentioned two vaporizers 2 and connect container 3 by the outlet of proportional valve 8, the second vaporizers 2 of its control, the outlet of squirt pump 4 is communicated with container 3, aeration tube 5 is immersed in the look alkaline solution, and the exit of container 3 connects strainer 6.

During work: the look alkaline solution behind the mercerising is through the filtration of 3 strainers 1 and the evaporation concentration of 2 vaporizers 2 leave in the container 3 successively, by spraying into hydrogen peroxide in the look alkali lye of squirt pump 4 in container 3, be equipped with aeration tube 5 accelerated reactions simultaneously, colourless until the clarification of look alkaline solution, filter through filter 6 again, can realize the recovery of look alkaline solution and remove look.

Claims

1. look alkali reclaims, removes the method for look behind the field of printing and dyeing mercerising, it is characterized in that comprising the steps: that filter (1), evaporate (2), (3) remove look, filter (4), wherein in removing the look step, by spraying into hydrogen peroxide in the look alkali lye of squirt pump in container, be equipped with the aeration tube accelerated reaction simultaneously, colourless until the clarification of look alkaline solution.

2. look alkali reclaims to reach and removes color method behind the field of printing and dyeing mercerising as claimed in claim 1, and it is characterized in that: the alkaline solution of checking colors in the step (1) adopts cascade filtration.

3. look alkali reclaims to reach and removes color method behind the field of printing and dyeing mercerising as claimed in claim 1, it is characterized in that: the alkaline solution of checking colors in the step (2) adopts multistage evaporation to concentrate.

4. look alkali reclaims behind the realization field of printing and dyeing mercerising as claimed in claim 1, remove the method equipment therefor of look, it is characterized in that: comprise a plurality of strainers (1), a plurality of vaporizers (2), hold the container (3) of the look alkaline solution after the filtering and concentrating, in container (3), spray into the squirt pump (4) of hydrogen peroxide, the aeration tube of accelerated reaction (5) and remove dereaction after the strainer (6) of solution impurity, wherein be equipped with liquidometer (7) on each vaporizer (2) and by the proportional valve (8) of its control, the look alkaline solution passes through successively that filter (1) filters and vaporizer (2) leaves in the container (3) after concentrated behind the mercerising, the outlet of squirt pump (4) is communicated with container (3), aeration tube (5) is immersed in the look alkaline solution, and the exit of container (3) connects strainer (6).