阅读说明：本技术 一种纤维素粘胶生产过程中产生废胶的回收设备及其回收方法 (Recovery equipment and recovery method for waste glue generated in cellulose viscose production process ) 是由 邱金江 李瑞丰 江修才 李萌 马庆强 张治忠 杨同财 卜凡兴 帅伟进 杨明波 于 2019-09-27 设计创作，主要内容包括：本发明提出了一种纤维素粘胶生产过程中产生废胶的回收设备及其回收方法,包括废胶收集罐和溶解碱罐和混合罐,所述混合罐依次连通有过滤器和除杂装置,除杂装置连接有高位槽,高位槽连接有一离心机,离心机连接有粘胶存储罐,回收步骤包括：步骤一、将粘胶和稀碱按照体积1:5的比例混合均匀；步骤二、混合均匀后的稀粘胶,利用丝网过滤器和锥形除杂装置除去较大杂质；步骤三、将步骤二得到的稀粘胶经过碟式分离器,进行固液两相分离；步骤四、离心好的稀粘胶水进入储存罐,留作生产用；步骤五、处理好的回收粘胶水回到生产系统中,回收的粘胶与新粘胶混合使用。(The invention provides a recovery device and a recovery method for waste glue generated in the production process of cellulose viscose, and the recovery device comprises a waste glue collecting tank, a dissolved alkali tank and a mixing tank, wherein the mixing tank is sequentially communicated with a filter and an impurity removal device, the impurity removal device is connected with an elevated tank, the elevated tank is connected with a centrifuge, the centrifuge is connected with a viscose storage tank, and the recovery step comprises the following steps: step one, uniformly mixing viscose and dilute alkali according to the volume ratio of 1: 5; step two, removing larger impurities from the uniformly mixed dilute viscose by using a silk screen filter and a conical impurity removal device; thirdly, carrying out solid-liquid two-phase separation on the dilute viscose obtained in the second step through a disc type separator; step four, the centrifuged dilute viscose water enters a storage tank for production; and step five, returning the treated recovered viscose water to a production system, and mixing the recovered viscose with new viscose for use.)

1. The utility model provides a recovery plant of production waste rubber in cellulose viscose production process which characterized in that includes:

the waste glue collecting tank and the alkali dissolving tank are respectively and jointly connected with a mixing tank through a conveying pipeline, the mixing tank is sequentially communicated with a filter and an impurity removing device, the mixing tank is connected with an inlet of the filter through a conveying pipeline, the impurity removing device comprises a support, a slag removing barrel is arranged on the support, a dilute adhesive inlet is arranged at the side part of the slag removing barrel, a glue outlet is arranged at the top part of the slag removing barrel, a slag discharging port is arranged at the bottom part of the slag removing barrel, a separating chamber, a slag settling chamber and a secondary glue storage chamber are sequentially arranged in the slag removing barrel from top to bottom, a filter plate driven by a power device is slidably arranged between the slag settling chamber and the secondary glue storage chamber, the slag discharging port is arranged at the bottom part of the secondary glue storage chamber, a first collecting tank is arranged below the slag discharging port, and a secondary separating port is arranged at the bottom part of the secondary glue storage chamber, the secondary separation mouth is connected with first centrifugal pump through secondary pipeline, the auger blade by motor drive is installed to the secondary pipeline internal rotation, the centrifugal pump passes through pipeline and rare viscose entry intercommunication, it is connected with the elevated tank through a pipeline to go out the jiao kou, the elevated tank is connected with the centrifugation entry of a centrifuge through a pipeline, centrifuge's liquid export is connected with the viscose storage jar through a pipeline, centrifuge's solid-state export below is equipped with the second collecting vat, the viscose storage jar is connected with the dissolving machine through a pipeline.

2. The recycling apparatus for waste glue generated in the cellulose viscose manufacturing process according to claim 1, wherein the outlet of the mixing tank is connected with a first circulation pipeline, the first circulation pipeline is provided with a second centrifugal pump, the first circulation pipeline is respectively connected with a second circulation pipeline and a filter connecting pipeline, the second circulation pipeline extends into the mixing tank, and the filter connecting pipeline is connected with the filter inlet.

3. A method for recovering waste glue generated in the production process of cellulose viscose comprises the following steps:

step one, uniformly mixing viscose and dilute alkali according to the volume ratio of 1: 5;

step two, removing larger impurities from the uniformly mixed dilute viscose by using a silk screen filter and a conical impurity removal device;

thirdly, carrying out solid-liquid two-phase separation on the dilute viscose obtained in the second step through a disc type separator;

step four, the centrifuged dilute viscose water enters a storage tank for production;

and step five, returning the treated recovered viscose water to a production system, and mixing the recovered viscose with new viscose for use.

4. The method for recovering the waste glue generated in the cellulose viscose production process according to claim 2, wherein the step one specific process comprises the following steps:

a) firstly, adding 5 cubic meters of dissolved alkali into a mixing tank, starting stirring, and adding 1 cubic meter of waste rubber into the mixing tank;

b) and after the waste rubber is added, starting a second centrifugal pump for circulation until the waste rubber is uniformly mixed.

5. The method for recovering the waste glue generated in the production process of cellulose viscose according to claim 3, wherein the concentration of the dissolved alkali used in the dilute alkali selection production is 10-20 g/L.

6. The method for recycling the waste glue generated in the cellulose viscose manufacturing process according to claim 3, wherein the circulating pump is a centrifugal pump to prevent the non-uniformly mixed viscose from entering the processing system; the pipe diameter of the conical impurity removing device is 50 mm; the separator is a DHNJ380 disc centrifuge, the water for operation of the centrifuge is softened water, and the pressure is 3.5-5.0kg/cm²The feeding pressure of the centrifugal machine is 1.5-2.5kg/cm²The discharge pressure of the centrifugal machine is less than or equal to 5.0kg/cm²(ii) a The storage tank is a plastic tank with 7.5 cubic capacity.

7. The method for recovering the waste glue generated in the cellulose viscose production process according to claim 3, wherein the concrete process of the step five is as follows:

a) adding the treated viscose into a dissolving machine;

b) after each discharge, 500L of the treated viscose is added into the dissolving machine.

8. The method of claim 3, wherein the dissolved alkali is a dilute alkali of 10-20g/L, and the viscose is a gum obtained by dissolving xanthate produced by reacting cellulose with carbon disulfide with the dissolved alkali.

9. The method for recovering the waste glue generated in the cellulose viscose manufacturing process according to claim 7, wherein the dissolver is a mixing tank for dissolving the xanthate with alkali, and is communicated with a circulation loop, a viscose pump and a grinding pump.

Technical Field

The invention relates to the technical field of regenerated cellulose membranes, in particular to a recovery device and a recovery method for waste glue generated in the production process of cellulose viscose.

Background

Along with the improvement of living standard and environmental protection consciousness of people, the consumption of a regenerated cellulose membrane (cellophane) which is a novel green and environmental-friendly packaging material is more and more increased. Most glassine paper in the market is produced by using viscose (xanthate) as raw material, and because of the nature of cellulose, certain crystalline regions of the cellulose are not easy to combine with carbon disulfide to generate soluble xanthate. These cellulose, which is not fully reacted with carbon disulphide, will be present in the form of fibre wool when it is later dissolved to viscose. When the viscose passes through the filter, the fiber hairs in the viscose block the net of the filter, and the automatic backwashing times of the filter are increased, so that a certain amount of waste rubber is generated. The characteristics of more wool, low ammonium value, poor stability and the like of the waste glue fiber determine that the waste glue fiber can not be directly used for producing the glass paper and is often directly treated as waste.

Disclosure of Invention

Aiming at the technical problem, the invention provides a recovery device and a recovery method for waste glue generated in the production process of cellulose viscose.

The technical scheme of the invention is realized as follows: a recovery plant of waste glue produced in cellulose viscose production process includes:

the waste glue collecting tank and the alkali dissolving tank are respectively and jointly connected with a mixing tank through a conveying pipeline, the mixing tank is sequentially communicated with a filter and an impurity removing device, the mixing tank is connected with an inlet of the filter through a conveying pipeline, the impurity removing device comprises a support, a slag removing barrel is arranged on the support, a dilute adhesive inlet is arranged at the side part of the slag removing barrel, a glue outlet is arranged at the top part of the slag removing barrel, a slag discharging port is arranged at the bottom part of the slag removing barrel, a separating chamber, a slag settling chamber and a secondary glue storage chamber are sequentially arranged in the slag removing barrel from top to bottom, a filter plate driven by a power device is slidably arranged between the slag settling chamber and the secondary glue storage chamber, the slag discharging port is arranged at the bottom part of the secondary glue storage chamber, a first collecting tank is arranged below the slag discharging port, and a secondary separating port is arranged at the bottom part of the secondary glue storage chamber, the secondary separation mouth is connected with first centrifugal pump through secondary pipeline, the auger blade by motor drive is installed to the secondary pipeline internal rotation, the centrifugal pump passes through pipeline and rare viscose entry intercommunication, it is connected with the elevated tank through a pipeline to go out the jiao kou, the elevated tank is connected with the centrifugation entry of a centrifuge through a pipeline, centrifuge's liquid export is connected with the viscose storage jar through a pipeline, centrifuge's solid-state export below is equipped with the second collecting vat, the viscose storage jar is connected with the dissolving machine through a pipeline.

As a preferred technical scheme, an outlet of the mixing tank is communicated with a first circulating pipeline, the first circulating pipeline is provided with a second centrifugal pump, the first circulating pipeline is respectively communicated with a second circulating pipeline and a filter connecting pipeline, the second circulating pipeline extends into the mixing tank, and the filter connecting pipeline is communicated with an inlet of the filter.

The other technical scheme of the invention is realized as follows: a method for recovering waste glue generated in the production process of cellulose viscose comprises the following steps:

step one, uniformly mixing viscose and dilute alkali according to the volume ratio of 1: 5;

step two, removing larger impurities from the uniformly mixed dilute viscose by using a silk screen filter and a conical impurity removal device;

thirdly, carrying out solid-liquid two-phase separation on the dilute viscose obtained in the second step through a disc type separator;

step four, the centrifuged dilute viscose water enters a storage tank for production;

and step five, returning the treated recovered viscose water to a production system, and mixing the recovered viscose with new viscose for use.

As a preferred technical scheme, the step one specific process is as follows:

a) firstly, adding 5 cubic meters of dissolved alkali into a mixing tank, starting stirring, and adding 1 cubic meter of waste rubber into the mixing tank;

b) and after the waste rubber is added, starting a second centrifugal pump for circulation until the waste rubber is uniformly mixed.

As a preferable technical scheme, the dilute alkali is dissolved alkali used in production, and the concentration is 10-20 g/L.

As a preferred technical scheme, the circulating pump is a centrifugal pump, so that non-uniform mixed viscose is prevented from entering a treatment system; the pipe diameter of the conical impurity removing device is 50 mm; the separator is a DHNJ380 disc centrifuge, the water for operation of the centrifuge is softened water, and the pressure is 3.5-5.0kg/cm²The feeding pressure of the centrifugal machine is 1.5-2.5kg/cm²The discharge pressure of the centrifugal machine is less than or equal to 5.0kg/cm²(ii) a The storage tank is a plastic tank with 7.5 cubic capacity.

As a preferred technical scheme, the specific process of the step five is as follows:

a) adding the treated viscose into a dissolving machine;

b) after each discharge, 500L of the treated viscose is added into the dissolving machine.

As a preferable technical scheme, the dissolved alkali is dilute alkali of 10-20g/L, and the viscose is a jelly formed by dissolving xanthate produced by the reaction of cellulose and carbon disulfide by the dissolved alkali.

As a preferable technical scheme, the dissolving machine is a mixing tank for dissolving the xanthate by alkali, and is communicated with a circulation loop, a viscose pump and a grinding pump.

By adopting the technical scheme, the invention has the beneficial effects that: the invention grasps the characteristics of the waste glue, removes insoluble matters such as fiber hairs and the like in the waste glue from the waste glue by utilizing the characteristics of the waste glue through the processes of dissolving, diluting, deslagging, centrifuging and the like, and uses the recovered viscose glue and the dissolved alkali in the dissolving machine together to serve as a part of the dissolved alkali.

In the aspect of economy: the method has the advantages of direct economy: when the annual output is 10000 tons, the waste glue discharge is reduced to 10-15 square/year from the original 300-400 square/day. The cost is saved by 45-50 ten thousand yuan per year; the method is indirect and economical: the impurities of the production system are reduced, the backwashing times of the filter are reduced, and the service life of the filter net is prolonged; less impurities, higher quality of viscose, higher quality of cellophane and less quality problem.

In the aspect of environmental protection: the viscose glue belongs to substances containing sulfur, alkali and high COD. Once flowed into the environment, it can cause serious environmental pollution to the environment. The waste rubber is centrifugally recycled by the method, and can be treated by one hundred percent and recycled by ninety percent. The impurities which can not be recycled are collected in a centralized way and are treated in a unified way. Greatly reducing the environmental protection pressure.

In a word, through use verification, the method can remove ninety-eight percent of impurities in the waste rubber, and the discharged impurities are treated in a centralized manner, so that the effects of treating hundred percent of waste rubber and zero discharge of waste are achieved, and the purposes of waste recycling, energy conservation, environmental protection and emission reduction are achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic flow diagram of the present invention.

FIG. 2 is a schematic diagram of the mixing tank and the circulation line.

FIG. 3 is a schematic view of the structure of the trash removal device.

Wherein: 1. a waste rubber collecting tank; 2. a dissolving alkali tank; 3. a mixing tank; 4. a filter; 5. an impurity removal device; 6. a support; 7. a deslagging cylinder body; 8. a dilute viscose inlet; 9. a glue outlet; 10. a slag discharge port; 11. a separation chamber; 12. a slag settling chamber; 13. a secondary glue storage chamber; 14. a filter plate; 15. a cylinder; 16. a first holding tank; 17. a secondary separation port; 18. a secondary delivery pipe; 19. a first centrifugal pump; 20. a head tank; 21. a centrifuge; 22. a viscose storage tank; 23. a second holding tank; 24. a dissolving machine; 25. a first circulation pipe; 26. a second centrifugal pump; 27. a second circulation pipe; 28. the filter is connected with the pipeline; 29. a screw blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.