A silane reactive distillation column catalyst passivation blowdown system
By introducing a catalyst passivation discharge system consisting of a discharge pipe, a closed alkali tank, and a filter press into a silane reactive distillation column, and utilizing the reaction of alkali with chlorosilane for passivation treatment, the environmental pollution problem during the discharge of spent catalyst is solved, and safe and environmentally friendly catalyst emissions are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 内蒙古鑫元硅材料科技有限公司
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-21
AI Technical Summary
Depleted catalysts in silane reactive distillation columns are prone to reacting with air during discharge, generating HCl, which pollutes the environment, and existing technologies make it difficult to achieve safe emissions.
A catalyst passivation discharge system is adopted, which includes a discharge pipe, a closed alkali tank, a conveyor and a filter press. The air in the closed alkali tank is replaced by nitrogen, and the passivation treatment is carried out by the reaction of alkali with chlorosilane attached to the catalyst, thus avoiding contact between the catalyst and air.
This achieves the safe emission of degraded catalysts, avoids the generation of HCl, protects the environment, and ensures the safety and environmental friendliness of the operation.
Smart Images
Figure CN224524705U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to the field of silane reaction technology, and in particular to a catalyst passivation and discharge system for a silane reactive distillation column. Background technology:
[0002] To meet the requirements of the production process, the interior of the silane reactive distillation column needs to be loaded with a catalyst. Over time, the catalyst will gradually degrade and become ineffective, failing to meet production requirements. At this point, it is necessary to remove the catalyst from the silane reactive distillation column and replace it with a new catalyst. Since the ineffective catalyst has adsorbed relatively reactive chlorosilanes, during the process of unloading the ineffective catalyst, the chlorosilanes are prone to react with air, producing HCl, which pollutes the environment. Utility model content:
[0003] The purpose of this invention is to provide a silane reactive distillation column catalyst passivation discharge system to solve the problems existing in the prior art.
[0004] This utility model is implemented by the following technical solution: a silane reactive distillation column catalyst passivation discharge system, which includes a discharge pipe, a closed alkali tank, a conveyor, and a filter press. The catalyst discharge port of the silane reactive distillation column is connected to the catalyst inlet of the closed alkali tank through the discharge pipe. The discharge port of the closed alkali tank is connected to the inlet of the conveyor. The discharge port of the conveyor is connected to the inlet of the filter press.
[0005] Furthermore, the sealed alkali tank includes a closed tank body, with a nitrogen inlet pipe and an exhaust pipe connected to the top of the closed tank body; a catalyst inlet is connected to the side of the closed tank body, and a discharge port is connected to the bottom of the closed tank body.
[0006] Furthermore, the drain outlet of the filter press is connected to the inlet of the filtrate collection tank.
[0007] The advantages of this invention are as follows: Before the catalyst is discharged from the silane reactive distillation column, nitrogen can be used to replace the air in the closed alkali tank. The spent catalyst discharged from the silane reactive distillation column is then transported to the closed alkali tank through a closed discharge pipe, allowing the chlorosilanes attached to the catalyst to undergo hydrolysis in the alkali solution. During this process, the catalyst can be isolated from the air, thus preventing the chlorosilanes from reacting with the air to produce HCl, avoiding environmental pollution, and achieving the safe discharge of spent catalyst. Attached image description:
[0008] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0009] In the picture:
[0010] 1. Unloading pipe; 2. Sealed alkali tank; 3. Conveyor; 4. Filter press; 5. Silane reactive distillation column; 6. Catalyst inlet; 7. Discharge port; 8. Enclosed tank; 9. Nitrogen inlet pipe; 10. Tail gas pipe; 11. Filtration collection tank. Detailed implementation method:
[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0012] like Figure 1 As shown, a silane reactive distillation column catalyst passivation discharge system includes a discharge pipe 1, a closed alkali tank 2, a conveyor 3, and a filter press 4. The catalyst discharge port of the silane reactive distillation column 5 is connected to the catalyst inlet 21 of the closed alkali tank 2 through the discharge pipe 1. The discharge port 22 of the closed alkali tank 2 is connected to the inlet of the conveyor 3. The discharge port of the conveyor 3 is connected to the inlet of the filter press 4.
[0013] The sealed alkali tank 2 includes a closed tank body 23, i.e., a covered tank structure. A nitrogen inlet pipe 24 and a tail gas pipe 25 are connected to the top of the closed tank body 23. Specifically, multiple inlet pipes can be arranged along the length of the closed tank body 23. A catalyst inlet 21 is connected to the side of the closed tank body 23, and a discharge port 22 is connected to the bottom of the closed tank body 23. In some embodiments, the bottom of the closed tank body 23 is a conical bottom.
[0014] The drain outlet of filter press 4 is connected to the inlet of filtrate collection tank 6.
[0015] Material discharge process:
[0016] First, nitrogen is introduced into the sealed alkaline solution tank 2 through the nitrogen inlet pipe 24 to replace the air inside, so that the inside of the sealed alkaline solution tank 2 is a slightly positive pressure environment.
[0017] Then, the spent catalyst discharged from the silane reactive distillation column 5 is discharged into the closed alkaline solution tank 2 containing alkaline solution through the discharge pipe 1. The chlorosilane attached to the catalyst reacts with the alkaline solution to achieve passivation treatment of the catalyst. The gas generated in the process can be discharged to the tail gas treatment system through the tail gas pipe 25.
[0018] Finally, the passivated catalyst is discharged through the discharge port 22 to the conveyor 3, and then sent to the filter press 4 for solid-liquid separation. The separated filtrate is collected in the filtrate collection tank 6 and can be used as raw water for the tail gas absorption tower.
[0019] During the above process, nitrogen is continuously introduced into the sealed alkaline solution tank 2 through the nitrogen inlet pipe 24 to maintain a slightly positive pressure inside and prevent air from entering.
[0020] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
Claims
1. A catalyst passivation and discharge system for a silane reactive distillation column, characterized in that, It includes a discharge pipe, a closed alkali tank, a conveyor, and a filter press. The catalyst discharge port of the silane reactive distillation column is connected to the catalyst inlet of the closed alkali tank through the discharge pipe. The discharge port of the closed alkali tank is connected to the inlet of the conveyor. The discharge port of the conveyor is connected to the inlet of the filter press.
2. The catalyst passivation and discharge system for a silane reactive distillation column according to claim 1, characterized in that, The sealed alkali tank includes a closed tank body, with a nitrogen inlet pipe and an exhaust pipe connected to the top of the closed tank body; a catalyst inlet is connected to the side of the closed tank body, and a discharge port is connected to the bottom of the closed tank body.
3. The catalyst passivation and discharge system for a silane reactive distillation column according to claim 1, characterized in that, The drain outlet of the filter press is connected to the inlet of the filtrate collection tank.