On-line recycling and purifying device suitable for paper-making reconstituted tobacco coating liquid

Abstract

The utility model discloses an on-line recycling and purifying device suitable for paper-making reconstituted tobacco coating liquid, which relates to the technical field of tobacco manufacturing equipment, and comprises a coating liquid storage tank, a coating machine and an inclined screen type solid-liquid separator, a liquid outlet of the coating liquid storage tank is connected with a pipeline, the coating liquid is conveyed to the coating machine through the pipeline, and the inclined screen type solid-liquid separator is connected with the inclined screen type solid-liquid separator. A liquid outlet of the coating machine is connected with a feeding port of the inclined screen type solid-liquid separator through a pipeline, and a liquid outlet of the inclined screen type solid-liquid separator is connected with a liquid inlet of the coating liquid storage tank through a pipeline. In the using process, the inclined screen type solid-liquid separator is used for separating and recycling coating liquid contained in fine fibers, the recycling amount of the coating liquid is increased, meanwhile, the number of devices is reduced, time consumed in the process is shortened, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco manufacturing equipment, in particular to an on-line recovery and purification device for the coating liquid of the reconstituted tobacco sheet by the papermaking method. Background Technique

[0002] The coating liquid is a liquid formed by purifying, concentrating and blending the extraction liquid of the reconstituted tobacco sheet by the papermaking method, and is used for coating on the substrate in the coating process. During the substrate coating process, part of the coating liquid is absorbed by the substrate, and there will still be part of the coating liquid that cannot be absorbed by the substrate and forms residues. Since the coating liquid is composed of tobacco solubles, natural flavors and additives, the cost is relatively high. In order to save costs and avoid waste, the residual coating liquid needs to be recycled. During the coating process, fine fibers of the substrate will fall into the residual coating liquid, forming impurities. As the production time goes by, the fine fibers falling into the residual coating liquid will continuously increase, resulting in an increase in the viscosity of the residual coating liquid and a deterioration in fluidity. When the residual coating liquid is used to coat the substrate, it is difficult for the substrate to pass through the coating roller, ultimately causing frequent paper breaks in the coating process and affecting product quality and production efficiency.

[0003] The existing purification of the coating liquid mainly uses screening in combination with centrifugation. For example, the patent with the application number 202120606289.7 discloses a purification system for recovering the coating liquid, which uses a circular vibrating screen for the first purification and a horizontal scroll centrifuge for the second purification of the coating liquid. The fine fibers falling on the substrate itself have an absorption effect on the coating liquid. Therefore, the fine fibers separated by the circular vibrating screen also contain a relatively high content of the coating liquid. In the above-mentioned patent disclosure, the horizontal scroll centrifuge is used to centrifuge the coating liquid, while the fine fibers separated by the circular vibrating screen are not processed. Therefore, the coating liquid contained in the fine fibers cannot be recovered. As the amount of fine fibers increases, the amount of the coating liquid that cannot be recovered also increases correspondingly, resulting in a certain degree of waste of the coating liquid. And in the above-mentioned patent, after the coating liquid is screened, it needs to be transported to the horizontal scroll centrifuge through a pipeline. The process involves a large number of equipment, requires more placement space, and the process takes a long time.

[0004] Therefore, it is necessary to provide a purification and recovery system for the coating liquid of the reconstituted tobacco sheet by the papermaking method to separate and recover the coating liquid contained in the fine fibers themselves, increase the recovery amount of the coating liquid, reduce the number of equipment and the process time, and reduce the production cost. Content of the Utility Model

[0005] The main purpose of the utility model is to provide an on-line recovery and purification device for the coating liquid of the reconstituted tobacco sheet by the papermaking method, aiming to solve or partially solve the above technical problems.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An on-line recovery and purification device for the coating liquid of reconstituted tobacco by the papermaking method, comprising: a coating liquid storage tank, a coater, and an inclined screen solid-liquid separator. The liquid outlet of the coating liquid storage tank is connected to a pipeline, and the coating liquid is transported to the coater through the pipeline. The liquid outlet of the coater is connected to the feed inlet of the inclined screen solid-liquid separator through a pipeline, and the liquid outlet of the inclined screen solid-liquid separator is connected to the liquid inlet of the coating liquid storage tank through a pipeline.

[0008] As a further improvement of the present utility model, the inclined screen solid-liquid separator is selected to be of a model with an adjustable solid material discharge port.

[0009] The technical solution provided by the present utility model may include the following beneficial effects:

[0010] During the use of the present utility model, the inclined screen solid-liquid separator squeezes out the fine fibers filtered out from the residual coating liquid, extrudes and recovers the coating liquid contained in the fine fibers for reuse, increases the recycling amount of the coating liquid, and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] By describing the exemplary embodiments of the present utility model in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present utility model will become more obvious. Among them, in the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0012] Figure 1 is a schematic structural diagram of an on-line recovery and purification device for the coating liquid of reconstituted tobacco by the papermaking method;

[0013] Figure 2 is a flowchart of the operation of an on-line recovery and purification device for the coating liquid of reconstituted tobacco by the papermaking method;

[0014] REFERENCE SIGNS:

[0015] 1. Coating liquid storage tank; 2. Coater; 3. Inclined screen solid-liquid separator; 4. Substrate; 5. Solid material collection container. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] Such asFigure 1-2 As shown in the figure, the coating liquid purification and recovery system includes a coating liquid storage tank 1, a coating machine 2, and an inclined screen solid-liquid separator 3. The liquid outlet of the coating liquid storage tank 1 is connected to a pipeline, and the coating liquid is transported to the coating machine 2 through the pipeline. The liquid outlet of the coating machine 2 is connected to the feed inlet of the inclined screen solid-liquid separator 3 through a pipeline, and the liquid outlet of the inclined screen solid-liquid separator 3 is connected to the liquid inlet of the coating liquid storage tank 1 through a pipeline; the inclined screen solid-liquid separator 3 is selected with a model whose solid material discharge port is adjustable. The coating liquid flows out from the liquid outlet of the coating liquid storage tank 1, flows through the pipeline to the location where the coating machine 2 is located and is used by the coating machine 2 for coating the substrate 4. After the coating liquid is used by the coating machine 2, the remaining coating liquid flows out from the liquid outlet of the coating machine 2 and flows into the inclined screen solid-liquid separator 3 through the pipeline. The coating liquid flowing into the inclined screen solid-liquid separator 3 is first filtered by the inclined screen of the inclined screen solid-liquid separator 3. After the fine fibers in the coating liquid are screened out, they fall along the inclined screen into the squeezing system for squeezing. After the liquid passes through the inclined screen, it flows out from the liquid outlet of the inclined screen solid-liquid separator 3 and flows back into the coating liquid storage tank 1 through the pipeline for reuse. After the fine fibers entering the squeezing system of the inclined screen solid-liquid separator 3 are squeezed, the squeezed coating liquid will also flow out from the liquid outlet of the inclined screen solid-liquid separator 3 and flow back into the coating liquid storage tank 1 through the pipeline for reuse. The squeezed fine fibers are discharged from the solid material discharge port of the inclined screen solid-liquid separator 3 and fall into the solid material collection container 5 for unified collection. Thus, the filtered coating liquid and the coating liquid squeezed out from the fine fibers are both recovered and reused, increasing the coating liquid recovery amount. And the circular purification and recovery of the coating liquid involves a total of 3 devices. The number of devices involved in the process is small, and the coating liquid flows through fewer devices, which can effectively reduce the production cost. By adjusting the solid material discharge port of the inclined screen solid-liquid separator 3, the solid material discharge speed can be controlled, thereby controlling the squeezing time of the fine fibers to control the moisture content of the solid material during discharge. In the present utility model, the moisture content of the solid material during discharge is controlled at about 20%.

[0018] The working process of the present utility model: After connecting the coating liquid storage tank, the coating machine, and the inclined screen solid-liquid separator with pipelines as required, then operate each device according to the operating procedures. The coating liquid also first flows out from the coating liquid storage tank, flows through the pipeline to the coating machine. The coating machine uses the coating liquid to coat the substrate. After coating, the remaining coating liquid flows out from the liquid outlet of the coating machine and flows into the inclined screen solid-liquid separator through the pipeline. The filtered coating liquid and the coating liquid squeezed out from the fine fibers both flow out from the liquid outlet of the inclined screen solid-liquid separator and flow back into the coating liquid storage tank for reuse. The squeezed fine fibers are discharged from the solid material discharge port of the inclined screen solid-liquid separator and are unifiedly collected by the solid material collection container. The overall process forms a cycle to complete the purification and recovery of the coating liquid and reuse it again.

[0019] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An on-line recycling and purification device for the coating liquid of reconstituted tobacco by the papermaking method, characterized in that, Including: A coating liquid storage tank, a coating machine, and an inclined screen solid-liquid separator. The liquid outlet of the coating liquid storage tank is connected to a pipeline, and the coating liquid is transported to the coating machine through the pipeline. The liquid outlet of the coating machine is connected to the feed inlet of the inclined screen solid-liquid separator through a pipeline, and the liquid outlet of the inclined screen solid-liquid separator is connected to the liquid inlet of the coating liquid storage tank through a pipeline.

2. The on-line recycling and purification device for the coating liquid of the reconstituted tobacco sheet by the papermaking method according to claim 1, wherein, The inclined screen solid-liquid separator selected is of a model with an adjustable solid material discharge port.

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