Solid catalyst feeding device

Abstract

The utility model discloses a solid catalyst feeding device which comprises a reaction kettle, a jet orifice of the jet pump is connected with an inlet of the reaction kettle through a pipeline; the catalyst feeding bin and the liquid raw material bin are respectively connected with an inlet of the injection pump through a pipeline and a valve pipeline; the first nitrogen supply equipment is connected with the catalyst feeding bin through a pipeline; and the first industrial water supply equipment is connected with the catalyst feeding bin through a pipeline. The stirring paddle is arranged in the Raney nickel feeding bin, so that unsmooth feeding caused by long-time Raney nickel deposition is prevented. By arranging the nitrogen seal, after feeding is finished, replacement is conducted through nitrogen, and the accident risk caused by air residues in the system is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of catalysts, in particular to a solid catalyst feeding device. Background Art

[0002] Raney nickel, also known as Lany nickel, is a solid-state catalyst composed of fine grains of a nickel-aluminum alloy with a porous structure. Its preparation involves treating the nickel-aluminum alloy with a concentrated sodium hydroxide solution. During this process, most of the aluminum reacts with the sodium hydroxide and dissolves, leaving behind numerous micropores of varying sizes. While the Raney nickel appears as a fine gray powder, from a microscopic perspective, each tiny particle within the powder is a three-dimensional porous structure. This porous structure significantly increases its surface area. This large surface area results in high catalytic activity, making Raney nickel widely used as a heterogeneous catalyst in hydrogenation reactions in organic synthesis and industrial production.

[0003] However, exposure to air can easily cause combustion and lead to safety accidents. Therefore, safety precautions must be taken during use. During the feeding process, it is necessary to ensure that the catalyst is added to the reaction solution. During the post-use filtration and recovery process, it is necessary to ensure safe filtration to prevent it from being drained out and exposed to air, which could cause fire accidents. Currently, in the industry, Raney nickel is usually fed directly by manual feeding or vacuum extraction, which can easily cause Raney nickel to spill and spontaneously combust, affecting production safety.

[0004] Some current technologies involve introducing nitrogen and Raney nickel from a feed tank into a reactor through a feed pipe. However, when nitrogen enters the reactor along with the Raney nickel, the Raney nickel cannot come into contact with the liquid material in the reactor in a timely manner. If air remains in the reactor, the use of the Raney nickel will be affected, and there may still be a risk of accidents. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and provide a solid catalyst feeding device.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] A solid catalyst feeding device, comprising:

[0008] Reactor;

[0009] A jet pump, wherein the jet port of the jet pump is connected to the inlet of the reactor through a pipeline;

[0010] The catalyst feeding bin and the liquid raw material bin are respectively connected to the inlet of the jet pump through pipelines and valve pipelines;

[0011] a first nitrogen supply device, the nitrogen supply device being connected to the catalyst feeding bin via a pipeline;

[0012] The first industrial water supply equipment is connected to the catalyst feeding bin through a pipeline.

[0013] As a further description of the above technical solution, a first stirring paddle is provided in the catalyst feeding bin, and the stirring paddle is used to mix the materials in the catalyst feeding bin evenly.

[0014] As a further description of the above technical solution, a second stirring paddle is provided in the reactor, and the second stirring paddle is used to mix the materials in the reactor.

[0015] As a further description of the above technical solution, the reactor is also connected to a hydrogen supply device and a second nitrogen supply device through pipelines.

[0016] As a further description of the above technical solution, the reactor is further connected to a tail gas removal system via a pipeline, and the tail gas removal system is connected to the catalyst feeding bin via a pipeline.

[0017] As a further description of the above technical solution, the catalyst feeding bin is made of 316L stainless steel or titanium, the first stirring paddle is any one of anchor type, paddle type or spiral ribbon type, and the internal smoothness of the catalyst feeding bin is Ra0.5-0.8.

[0018] As a further description of the above technical solution, the jet pump is a water jet vacuum pump.

[0019] As a further description of the above technical solution, the reactor is made of 316L stainless steel or titanium, and the internal smoothness of the reactor is Ra1.6.

[0020] As a further description of the above technical solution, an annular spray pipe is provided on the top of the catalyst feeding bin.

[0021] As a further description of the above technical solution, the catalyst feeding bin is a Raney nickel feeding bin. The beneficial effects of the utility model are as follows:

[0022] 1. The utility model first lays the bottom of the liquid raw material in the reactor, then feeds the mixture of catalyst and Raney nickel, and after the catalyst is fed, the remaining liquid material is fed to flush the residual Raney nickel in the feed pipeline to prevent it from accumulating in the pipeline.

[0023] 2. The utility model provides a stirring paddle in the Raney nickel feeding bin to prevent Raney nickel from being deposited for a long time and causing poor feeding.

[0024] 3. The utility model sets a nitrogen seal, and replaces the air with nitrogen after the feeding is completed, so as to avoid residual air in the system and the risk of accidents.

[0025] In order to more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the solid catalyst feeding device of the utility model;

[0027] Figure 2 It is an enlarged schematic diagram of the Raney nickel feeding silo of the utility model;

[0028] Figure 3 It is an enlarged schematic diagram of the hydrogenation reactor of the utility model;

[0029] Figure 4 It is a schematic diagram of the annular spray pipe in the utility model.

[0030] Figure numerals: 100, reactor; 110, second stirring paddle; 120, hydrogen supply device; 130, second nitrogen supply equipment; 200, jet pump; 300, catalyst feeding bin; 310, first nitrogen supply equipment; 320, first industrial water supply equipment; 330, first stirring paddle; 400, liquid raw material bin; 500, exhaust gas removal system. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0032] like Figure 1-Figure 3 As shown, in one embodiment, a solid catalyst feeding device includes a reactor 100, specifically, the reactor 100 is a hydrogenation reactor 100, and a hydrogen supply device 120 extends into the bottom of the reactor 100 through a pipeline to hydrogenate the reactor 100;

[0033] Jet pump 200, preferably a water jet vacuum pump, the injection port of jet pump 200 is connected to the import of reactor 100 by a pipeline, and the two imports of jet pump 200 are respectively connected to catalyst feed bin 300 and liquid raw material bin 400 by a pipeline with a valve. When in use, the liquid raw material enters the reactor 100 bottom according to the set flow rate through jet pump 200, and starts stirring. Then open the regulating valve at the bottom of catalyst feed bin 300, i.e., Raney nickel feed bin, and the regulating valve of liquid raw material bin 400, control Raney nickel and raw material liquid to enter hydrogenation reactor 100 according to the set flow rate ratio, and the first industrial water supply equipment 320 is connected to the outside of catalyst feed bin 300. After Raney nickel feeding is completed, open the valve of the first industrial water supply equipment 320, add industrial water in catalyst feed bin 300, rinse catalyst feed bin 300, reduce Raney nickel residue, and rinse water enters reactor 100 through jet pump 200;

[0034] The catalyst feeding bin 300 is also connected to a first nitrogen supply device 310. After the Raney nickel is fed into the feeding bin, the feeding port is closed and nitrogen is filled into the catalyst feeding bin 300 through the first nitrogen supply device 310. After the nitrogen replacement is qualified, stirring is started to ensure that the oxygen content in the feeding bin is less than 1%, thereby avoiding the risk of explosion caused by the reaction of Raney nickel with air.

[0035] After the Raney nickel catalyst is added, the remaining liquid raw material can be fed into the reactor 100 through the jet pump 200 .

[0036] It should be noted that before the Raney nickel catalyst is added, the Raney nickel is mixed with water in accordance with production index requirements and canned to form a fixed package to facilitate the operation of the feeding personnel. After the feeding is completed, the barrel mouth of the feeding barrel is closed in time.

[0037] Further, a first stirring paddle 330 is provided inside the catalyst feeding bin 300, and the first stirring paddle 330 is used to mix the materials of the catalyst feeding bin 300 evenly, to prevent Raney nickel from accumulating and sinking for a long time, causing blockage of the pipeline. The internal smoothness of the catalyst feeding bin 300 is Ra0.5-0.8, to reduce the residue of Raney nickel inside the catalyst feeding bin 300. At the same time, a second stirring paddle 110 is provided in the hydrogenation reactor 100, and the mixed materials in the reactor 100 can be evenly mixed. Wherein, the first stirring paddle 330 is any one of anchor type, paddle type or spiral type, and can be selected according to actual needs, and the catalyst feeding bin 300 is 316L stainless steel or titanium. The material of the reactor 100 is any one of 316L stainless steel or titanium, and the internal smoothness of the reactor 100 is Ra1.6, to reduce catalyst sticking to the wall.

[0038] An annular spray pipe (such as Figure 4 ), it can be sprayed onto the inner wall of the catalyst feeding bin and the first stirring paddle 330 through the annular spray pipe to avoid catalyst residue.

[0039] Furthermore, the jet pump 200 is a water jet vacuum pump, preferably any one of a PSB water jet vacuum pump, an RPB water jet vacuum pump, an RPPB water jet vacuum pump or an RPB water jet vacuum pump.

[0040] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A solid catalyst feeding device, characterized in that: include: Reactor; A jet pump, wherein the jet port of the jet pump is connected to the inlet of the reactor through a pipeline; The catalyst feeding bin and the liquid raw material bin are respectively connected to the inlet of the jet pump through pipelines and valve pipelines; a first nitrogen supply device, the nitrogen supply device being connected to the catalyst feeding bin via a pipeline; The first industrial water supply equipment is connected to the catalyst feeding bin through a pipeline.

2. The solid catalyst feeding device according to claim 1, characterized in that: A first stirring paddle is provided in the catalyst feeding bin, and the stirring paddle is used to mix the materials in the catalyst feeding bin evenly.

3. The solid catalyst feeding device according to claim 1, characterized in that: A second stirring paddle is provided in the reactor, and the second stirring paddle is used to mix the materials in the reactor.

4. The solid catalyst feeding device according to claim 1, characterized in that: The reactor is also connected to a hydrogen supply device and a second nitrogen supply device through pipelines.

5. The solid catalyst feeding device according to claim 1, characterized in that: The reactor is also connected to a tail gas removal system via a pipeline, and the tail gas removal system is connected to the catalyst feeding bin via a pipeline.

6. The solid catalyst feeding device according to claim 2, characterized in that: The catalyst feeding bin is made of 316L stainless steel or titanium, the first stirring paddle is any one of anchor type, paddle type or spiral ribbon type, and the internal smoothness of the catalyst feeding bin is Ra0.5-0.

8.

7. The solid catalyst feeding device according to claim 1, characterized in that: The jet pump is a water jet vacuum pump.

8. The solid catalyst feeding device according to claim 1, characterized in that: The reactor is made of 316L stainless steel or titanium, and the internal smoothness of the reactor is Ra1.

6.

9. The solid catalyst feeding device according to claim 1, characterized in that: An annular spray pipe is provided on the top of the catalyst feeding bin.

10. The solid catalyst feeding device according to claim 1, characterized in that: The catalyst feeding bin is a Raney nickel feeding bin.

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