Distillation system capable of recycling catalyst

Abstract

The utility model provides a distillation system for cyclic utilization of a catalyst, which comprises a first rectifying tower and a second rectifying tower which are connected in series and are communicated through a connecting pipe arranged between the first rectifying tower and the second rectifying tower; the first rectifying tower and the second rectifying tower are provided with filters and are respectively provided with a first lift liquid pipe and a second lift liquid pipe which are communicated with inlets of the filters, and outlets of the filters are communicated with the connecting pipe. The system has the beneficial effects that the desalted water is recycled, so that the consumption of fresh water resources is reduced, and the water treatment cost and the environmental burden are reduced. By designing a special recovery link, the catalyst can be effectively recovered and reused, the waste of raw materials is reduced, the use of fresh water is reduced, the catalyst is effectively recovered, the generation and discharge of waste liquid are systematically reduced, the pollution to water and soil is reduced, and the ecological environment is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation systems, and particularly relates to a distillation system for recycling catalysts. Background Art

[0002] Nowadays, in chemical production plants, zinc sulfate is widely used as a key catalyst. However, this catalyst has a significant problem, that is, it gradually migrates downstream along with the material flow and is prone to accumulation during this process, thus causing pipeline blockage. According to the previous production treatment methods, in order to address this problem, desalted water is usually directly introduced into the pipeline to mix with the slurry containing the catalyst. Subsequently, this mixture is sent to a distillation tower for distillation separation.

[0003] Unfortunately, the desalted water generated during the separation process in the original distillation tower has a high chemical oxygen demand (COD) content, far exceeding the recoverable standard. Therefore, this part of the desalted water cannot be effectively recovered and utilized and can only be helplessly incorporated into the circulating water system. And a large amount of turbid liquid rich in catalysts is deposited in the distillation tower kettle, and these turbid liquids are regarded as waste and are sent to the zero-discharge wastewater treatment system for treatment. This approach not only causes great waste of resources but also invisibly brings a heavy burden to the enterprise's environmental protection work.

[0004] In recent years, with the continuous strengthening of the national control over environmental protection indicators, energy conservation and environmental protection have become important factors restricting the development of enterprises. At the same time, with the continuous expansion of the production capacity of projects in the park, the purity requirements for material products are also increasing day by day. This means that the traditional treatment methods can no longer meet the current production requirements and environmental protection standards. Summary of the Utility Model

[0005] To solve the problems of the desalted water and turbid liquid impurities generated by the current distillation tower being numerous and the products being unable to be directly utilized with poor environmental protection, the utility model provides a distillation system for recycling catalysts, which includes a first rectification tower and a second rectification tower connected in series, and a connecting pipe is provided between the first rectification tower and the second rectification tower for communication;

[0006] Filters are provided in the first rectification tower and the second rectification tower. The first rectification tower and the second rectification tower are respectively provided with a first stripping liquid pipe and a second stripping liquid pipe connected to the inlet of the filter, and the outlet of the filter is communicated with the connecting pipe.

[0007] As a preferred solution, a kettle reboiler is provided at the bottom of the second rectification tower, and the second rectification tower and the kettle reboiler are connected in a cycle.

[0008] As a preferred solution, a condenser is provided at the top of the second rectification tower.

[0009] As a preferred solution, a slag discharge pipe is arranged at the bottom of the filter.

[0010] As a preferred solution, the first rectification column is provided with a raw turbid liquid inlet pipe for introducing the raw turbid liquid into the first rectification column.

[0011] As a preferred solution, the second rectification column is provided with a liquid outlet pipe for discharging distilled water.

[0012] The beneficial effects of the present utility model are as follows:

[0013] By recycling the desalted water, the present utility model reduces the consumption of fresh water resources, lowers the water treatment cost and environmental burden. Through the design of a special recovery link, it ensures that the catalyst can be effectively recovered and reused, reduces the waste of raw materials, and reduces the use of fresh water. The effectively recovered catalyst systematically reduces the generation and discharge of waste liquid, reduces the pollution to water bodies and soil, and helps to protect the ecological environment. Description of the Drawings

[0014] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the drawings, where

[0015] Figure 1 Structure schematic diagram of the present utility model.

[0016] The reference numerals in the drawings are:

[0017] 1. First rectification column; 11. Raw turbid liquid inlet pipe; 12. Connecting pipe; 13. First stripping liquid pipe; 2. Second rectification column; 21. Liquid outlet pipe; 22. Second stripping liquid pipe; 23. Reboiler of the column kettle; 24. Condenser; 3. Filter; 31. Slag discharge pipe. Detailed Embodiments

[0018] To illustrate the characteristics of the present utility model, the following further describes the present utility model in conjunction with the drawings and embodiments.

[0019] Embodiment:

[0020] Please refer to Figure 1 , the embodiment of the present utility model provides a distillation system for recycling catalysts, including a first rectification column 1 and a second rectification column 2 connected in series. The first rectification column 1 is provided with a raw turbid liquid inlet pipe 11 for introducing the raw turbid liquid into the first rectification column 1. A connecting pipe 12 is arranged between the first rectification column 1 and the second rectification column 2 for communication. The second rectification column 2 is provided with a liquid outlet pipe 21 for discharging distilled water. The raw turbid liquid is fully separated by setting a two-stage distillation system.

[0021] The improvement of this embodiment lies in that a filter 3 is provided between the first rectification column 1 and the second rectification column 2, and a first bottoms draw pipe 13 and a second bottoms draw pipe 22 are respectively provided on the first rectification column 1 and the second rectification column 2 to communicate with the inlet of the filter 3, and the outlet of the filter 3 is communicated with the connecting pipe 12, realizing the recycling of the catalyst in the turbid liquid generated by the distillation column.

[0022] In addition, in order to ensure the distillation effect of the second rectification column 2, a reboiler 23 is provided at the bottom of the second rectification column 2 in this embodiment, and the second rectification column 2 is connected to the reboiler 23 in a cycle, and a condenser 24 is provided at the top of the second rectification column 2, respectively promoting the volatilization of the demineralized water and the condensation of the turbid liquid. Moreover, in order to effectively discharge the filter residue generated by the filter, a filter residue discharge pipe 31 is provided at the bottom of the filter 3 in this embodiment.

[0023] The above embodiments and the accompanying drawings are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention do not depart from the purpose of the present invention and should also fall within the scope of the claims of the present invention. Other related technical structures not exhaustively disclosed in the present invention are the prior art in the art.

Claims

1. A distillation system for catalyst recycling, characterized in that, It includes a first rectification column (1) and a second rectification column (2) connected in series, and a connecting pipe (12) is provided between the first rectification column (1) and the second rectification column (2) for communication; Filters (3) are provided in the first rectification column (1) and the second rectification column (2). A first stripping liquid pipe (13) and a second stripping liquid pipe (22) are respectively provided in the first rectification column (1) and the second rectification column (2) to connect to the inlet of the filter (3), and the outlet of the filter (3) is communicated with the connecting pipe (12).

2. The distillation system for catalyst recycling according to claim 1, wherein: A reboiler (23) is provided at the bottom of the second rectification column (2), and the second rectification column (2) is connected to the reboiler (23) in a cycle.

3. The distillation system for catalyst recycling according to claim 1, wherein: A condenser (24) is provided at the top of the second rectification column (2).

4. The distillation system for catalyst recycling according to claim 1, characterized in that: A filter residue discharge pipe (31) is provided at the bottom of the filter (3).

5. The distillation system for catalyst recycling according to claim 1, wherein: The first rectification column (1) is provided with a raw turbid liquid inlet pipe (11) to introduce the raw turbid liquid into the first rectification column (1).

6. The distillation system for catalyst recycling according to claim 1, wherein: The second rectification column (2) is provided with a liquid discharge pipe (21) to discharge distilled water.

Images