Online resuscitation device for lyocell fiber ion exchange resin

Abstract

The utility model discloses an online resuscitation device for lyocell fiber ion exchange resin. The online resuscitation device comprises an ion exchanger, a resuscitation tank and a resuscitation pipeline, a water adding opening and an acid adding opening are formed in the top of the resuscitation tank, a water pump is arranged at the bottom of the resuscitation tank, the outlet end of the water pump is connected with a resuscitation liquid feeding pipeline, and the resuscitation liquid feeding pipeline is communicated with the resuscitation pipeline; the recovery pipeline comprises a lower feeding pipeline and an upper feeding pipeline, and an upper water inlet pipeline and a lower water inlet pipeline are arranged between the lower feeding pipeline and the upper feeding pipeline; the resuscitation liquid feeding pipeline is communicated with the lower feeding pipeline, the lower feeding pipeline is also provided with a raw material emptying pipeline, a resuscitation liquid emptying pipeline and a raw material discharging pipeline, the upper feeding pipeline is provided with a raw material adding pipeline and a resuscitation liquid returning pipeline, and the end part of the resuscitation liquid returning pipeline is communicated with the resuscitation tank; the cation resin is subjected to online recovery through the recovery liquid, the recovery method is simple, rapid and effective, the production efficiency can be improved, and the production cost and the working intensity of workers are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fiber production equipment, in particular to an online resuscitation device for lyocell fiber ion exchange resin. Background Art

[0002] Lyocell fiber is a regenerated cellulose fiber produced by wet spinning with NMMO (N-methylmorpholine-N-oxide) as solvent. In the above process, the high-concentration NMMO solvent is diluted into a low-concentration NMMO aqueous solution. Since NMMO is expensive and currently relies mainly on imports, in order to reduce the cost of the Lyocell fiber production process and improve economic benefits, NMMO needs to be recycled.

[0003] In the production process of lyocell fiber, the diluted NMMO solvent becomes a low-concentration NMMO aqueous solution, which inevitably contains various impurities such as cellulose and needs to be purified before it can be recycled. However, in the process of purifying the low-concentration NMMO aqueous solution, the ion exchange cation resin is easily contaminated by organic matter, affecting the ion exchange efficiency and product quality. Utility Model Content

[0004] The utility model aims to provide an online resuscitation device for lyocell fiber ion exchange resin, which can resuscitate the cationic resin in the ion exchanger online through resuscitation fluid. The resuscitation method is simple, fast and effective, which can improve production efficiency, reduce production costs and the work intensity of staff.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a lyocell fiber ion exchange resin online resuscitation device, comprising an ion exchanger, a resuscitation tank and a resuscitation pipeline, the bottom of the ion exchanger is provided with a bottom feed port, the top of the ion exchanger is provided with a top feed port, and an exhaust pipeline is provided at the top feed port; a water inlet and an acid inlet are provided at the top of the resuscitation tank, a resuscitation liquid is contained in the resuscitation tank, a water pump is provided at the bottom of the resuscitation tank, the outlet end of the water pump is connected to a resuscitation liquid feed pipeline, and the resuscitation liquid feed pipeline is connected to the resuscitation pipeline ; The recovery pipeline includes a lower feed pipeline and an upper feed pipeline, a water inlet pipeline is arranged between the lower feed pipeline and the upper feed pipeline, and the water inlet pipeline is divided into an upper water inlet pipeline and a lower water inlet pipeline; the lower feed pipeline is connected to the bottom feed port, the upper feed pipeline is connected to the top feed port, the recovery liquid feed pipeline is connected to the lower feed pipeline, and a raw material venting pipeline, a recovery liquid venting pipeline and a raw material discharge pipeline are also arranged on the lower feed pipeline, a raw material addition pipeline and a recovery liquid return pipeline are arranged on the upper feed pipeline, and the end of the recovery liquid return pipeline is connected to the recovery tank.

[0006] Optionally, the resuscitation tank is a vertical cylindrical structure and is made of stainless steel.

[0007] Optionally, the resuscitation fluid is a hydrochloric acid solution with a mass concentration of 18%.

[0008] Optionally, a self-circulating pipeline is further provided at the outlet end of the water pump, and an end of the self-circulating pipeline is connected to the resuscitation tank.

[0009] Optionally, the water pump adopts a magnetic pump.

[0010] Optionally, a magnetic flap level gauge is provided on the resuscitation tank.

[0011] The lyocell fiber ion exchange resin online resuscitation device of the utility model has the following advantages:

[0012] (1) A resuscitation liquid is prepared in a resuscitation tank, and then the resuscitation liquid is transported to an ion exchanger. The resuscitation liquid can remove organic matter remaining in the cationic resin in the ion exchanger and restore the ion exchange efficiency of the cationic resin. The resuscitation method is simple and fast, and can effectively improve production efficiency, reduce production costs and work intensity.

[0013] (2) The resuscitation tank is acid-resistant and can better store resuscitation fluid.

[0014] (3) The magnetic flap level gauge can help staff understand the amount of resuscitation fluid in the resuscitation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 This is a schematic diagram of the first purification process.

[0017] Figure 3 This is a schematic diagram of the second purification process.

[0018] Figure 4 This is a schematic diagram of the flushing process. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] like Figure 1-Figure 4 As shown, a lyocell fiber ion exchange resin online resuscitation device includes an ion exchanger 1, a resuscitation tank 2 and a resuscitation pipeline. The bottom of the ion exchanger 1 is provided with a bottom material port 3, the top of the ion exchanger 1 is provided with a top material port 4, and the top material port 4 is provided with an exhaust pipeline 5.

[0021] The resuscitation tank 2 is a vertical cylindrical structure, and is made of stainless steel, with good acid resistance. The top of the resuscitation tank 2 is provided with a water inlet 6 and an acid inlet 7. Desalted water is added to the resuscitation tank 2 through the water inlet 6, and hydrochloric acid with a mass concentration of 32% is added to the resuscitation tank 2 through the acid inlet 7. The resuscitation liquid in the resuscitation tank 2 is mixed in proportion by the above two to form hydrochloric acid with a mass concentration of 18%. The resuscitation tank 2 is provided with a magnetic flap level gauge (not shown in the figure) to facilitate the staff to observe the reserves of the resuscitation liquid in the resuscitation tank 2. A water pump 8 is provided at the bottom of the resuscitation tank 2. The water pump 8 adopts a magnetic pump. The outlet end of the water pump 8 is respectively connected to the resuscitation liquid feed pipeline 10 and the self-circulation pipeline 9. The end of the self-circulation pipeline 9 is connected to the resuscitation tank 2, and the resuscitation liquid feed pipeline 10 is connected to the resuscitation pipeline.

[0022] The recovery pipeline includes a lower feed pipeline 12 and an upper feed pipeline 13, and a water inlet pipeline is arranged between the lower feed pipeline 12 and the upper feed pipeline 13, and the water inlet pipeline is divided into an upper water inlet pipeline 14 and a lower water inlet pipeline 15. The lower feed pipeline 12 is connected to the bottom feed port 3, the upper feed pipeline 13 is connected to the top feed port 4, the recovery liquid feed pipeline 10 is connected to the lower feed pipeline 12, and the lower feed pipeline 12 is also provided with a raw material venting pipeline 16, a recovery liquid venting pipeline 17 and a raw material discharge pipeline 18, and the upper feed pipeline 13 is provided with a raw material addition pipeline 19 and a recovery liquid return pipeline 20, and the end of the recovery liquid return pipeline 20 is connected to the recovery tank 2.

[0023] First, the solvent in the ion exchanger 1 is emptied, and then the resuscitation liquid in the resuscitation tank 2 is pumped into the ion exchanger 1 from the lower feed pipeline 12 through the water pump 8, and then flows out from the upper feed pipeline 13, and finally discharged into the sewage system through the resuscitation liquid venting pipeline 17, and the ion exchanger 1 is initially purified. Then, desalted water and hydrochloric acid are added to the resuscitation tank 2, and circulated through the self-circulation pipeline 9 to prepare a second tank of resuscitation liquid. Similarly, it enters the ion exchanger 1 through the lower feed pipeline 12, then flows out from the upper feed pipeline 13, and returns to the resuscitation tank 2 through the resuscitation liquid return pipeline 20 to form a cycle, and a second cycle purification is performed. After circulating for a period of time, desalted water is introduced through the lower water inlet pipeline 15, and the recovery fluid in the system is hydraulically returned to the recovery tank 2 for next use, and then desalted water is introduced through the upper water inlet pipeline 14, enters the ion exchanger 1 through the upper feed pipeline 13, flows out from the lower feed pipeline 12, and finally is discharged into the sewage system through the recovery liquid vent pipeline 17 to complete the cleaning of the ion exchanger 1. After two purifications and one flushing, the organic matter remaining in the cationic resin can be effectively removed, and the ion exchange capacity of the cationic resin can be restored. The recovery method is simple and fast, which can effectively improve production efficiency, reduce production costs and work intensity. The bold lines in the attached figure are the flow routes of the recovery fluid or desalted water.

[0024] The embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model.

Claims

1. A Lyocell fiber ion exchange resin online resuscitation device, characterized in that: The utility model comprises an ion exchanger, a recovery tank and a recovery pipeline. The bottom of the ion exchanger is provided with a bottom feed port, the top of the ion exchanger is provided with a top feed port, and an exhaust pipeline is provided at the top feed port; a water adding port and an acid adding port are provided at the top of the recovery tank, and a recovery liquid is contained in the recovery tank; a water pump is provided at the bottom of the recovery tank, and the outlet end of the water pump is connected with a recovery liquid feed pipeline, and the recovery liquid feed pipeline is connected with the recovery pipeline; the recovery pipeline comprises a lower feed pipeline and an upper feed pipeline, and a water inlet pipeline is provided between the lower feed pipeline and the upper feed pipeline, and the water inlet pipeline is divided into an upper water inlet pipeline and a lower water inlet pipeline; the lower feed pipeline is connected with the bottom feed port, the upper feed pipeline is connected with the top feed port, the recovery liquid feed pipeline is connected with the lower feed pipeline, a raw material venting pipeline, a recovery liquid venting pipeline and a raw material discharge pipeline are also provided on the lower feed pipeline, a raw material adding pipeline and a recovery liquid return pipeline are provided on the upper feed pipeline, and the end of the recovery liquid return pipeline is connected with the recovery tank.

2. The lyocell fiber ion exchange resin online resuscitation device according to claim 1, characterized in that: The resuscitation tank is a vertical cylindrical structure and is made of stainless steel.

3. The lyocell fiber ion exchange resin online resuscitation device according to claim 1, characterized in that: The resuscitation fluid is a hydrochloric acid solution with a mass concentration of 18%.

4. The lyocell fiber ion exchange resin online resuscitation device according to claim 1, characterized in that: A self-circulating pipeline is also provided at the outlet end of the water pump, and the end of the self-circulating pipeline is connected to the resuscitation tank.

5. The lyocell fiber ion exchange resin online resuscitation device according to claim 1, characterized in that: The water pump adopts a magnetic pump.

6. The lyocell fiber ion exchange resin online resuscitation device according to claim 1, characterized in that: A magnetic flap level gauge is provided on the resuscitation tank.

Images