Raney nickel industrial synthesis system

Abstract

The utility model provides a Raney nickel industrial synthesis system, the system comprises a Raney nickel synthesis kettle and an auxiliary system, the Raney nickel synthesis kettle comprises a stirrer arranged inside, a heat exchange jacket arranged outside, and an induced air exhaust port, an alkali liquor feeding port, an inert gas feeding port and a material feeding port which are respectively arranged at the upper part of the outer wall, the aerator is connected with the inert gas adding opening, the cooling liquid inlet and the discharging opening are formed in the lower portion of the outer wall, and the cooling liquid outlet is formed in the side portion of the outer wall of the heat exchange jacket. The auxiliary system comprises a pure water supply device, an alkali liquor adding pump, a constant-temperature heat exchanger, an inert gas source, an induced draft fan and a screw feeder which are respectively connected with the Raney nickel synthesis kettle, an alkali liquor preparation kettle connected with the pure water supply device, and a first three-way pipe and a second three-way pipe which are used for shunting. According to the raney nickel synthesis device disclosed by the utility model, the automation of the raney nickel synthesis process is realized through precise pipeline connection among the components and precise control on reaction conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst production systems, in particular to a Raney nickel industrial synthesis system. Background Art

[0002] Raney nickel is a solid heterogeneous catalyst composed of fine grains of nickel-aluminum alloy with a porous structure. It was first used as a catalyst by American engineer Maury Raney in the hydrogenation process of vegetable oil. The high catalytic activity of Raney nickel comes from the catalytic properties of nickel itself and its porous structure, which is derived from the removal of aluminum from the nickel-aluminum alloy with a concentrated sodium hydroxide solution. This process is called leaching. Since the leaching reaction brings about the activity of the catalyst, and the hydrogen produced is stored in the catalyst, it is also called activation. During the activation process, due to the gradual increase in its surface area and the continuous adsorption of hydrogen produced by the leaching reaction, the Raney nickel formed after activation has moderate flammability, so the reaction in which Raney nickel participates should be handled in an inert gas environment. After activation, the resulting catalyst should be washed with distilled water at room temperature in order to remove any residual sodium aluminate. Deoxygenated water is the first choice for storing Raney nickel because it can prevent the oxidation of Raney nickel and reduce the risk of combustion. Therefore, the Raney nickel usually supplied is a 50% slurry mixed in water, which is not exposed to the air. The production process of preparing Raney nickel using concentrated sodium hydroxide is very easy to oxidize and explode.

[0003] In view of this, it is necessary to design an improved Raney nickel industrial synthesis system to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a Raney nickel industrial synthesis system, which improves production efficiency and safety by improving activation process and equipment.

[0005] To achieve the above-mentioned purpose of the utility model, the utility model provides a Raney nickel industrial synthesis system, including a Raney nickel synthesis kettle and an auxiliary system, wherein the Raney nickel synthesis kettle includes an agitator arranged inside the Raney nickel synthesis kettle, a heat exchange jacket arranged outside the Raney nickel synthesis kettle, an induced draft exhaust port, an alkali solution feeding port, an inert gas feeding port, and a material feeding port respectively arranged on the upper part of the outer wall of the Raney nickel synthesis kettle, an aerator connected to the inert gas feeding port, a coolant inlet and a discharge port arranged at the lower part of the outer wall of the heat exchange jacket, and a coolant outlet arranged on the side of the outer wall of the heat exchange jacket; the auxiliary system includes a pure water supply device, an alkali solution feeding pump, a constant temperature heat exchanger, an inert gas source, an induced draft fan and a screw feeder respectively connected to the Raney nickel synthesis kettle, an alkali solution preparation kettle connected to the pure water supply device, and a No. 1 tee pipe and a No. 2 tee pipe for diversion.

[0006] As a further improvement of the utility model, the first port of the No. 1 tee is connected to the pure water supply device through a pipeline, and a valve is provided on the pipeline; the second port of the No. 1 tee is connected to the alkali solution preparation kettle through a pipeline, and a valve is provided on the pipeline; the third port of the No. 1 tee is connected to the first port of the No. 2 tee through a pipeline, and the pipeline is provided with a valve.

[0007] As a further improvement of the utility model, one end of the alkali solution dosing pump is connected to the alkali solution preparation kettle through a pipeline, and a valve is provided on the pipeline.

[0008] As a further improvement of the utility model, the other end of the alkali solution dosing pump is connected to the second port of the No. 2 tee pipe through a pipeline, a valve is provided on the pipeline, and a liquid flow meter is provided on the pipeline between the valve and the alkali solution dosing pump.

[0009] As a further improvement of the utility model, the third port of the No. 2 three-way pipe is connected to the alkali solution addition port through a pipeline, and a valve is provided on the pipeline.

[0010] As a further improvement of the utility model, the liquid outlet of the constant temperature heat exchanger is connected to the coolant inlet through a pipe, and a valve is provided on the pipe; the liquid inlet of the constant temperature heat exchanger is connected to the coolant outlet through a pipe, and a valve is provided on the pipe.

[0011] As a further improvement of the utility model, the inert gas source is connected to the inert gas injection port through a pipeline, a valve is provided on the pipeline; a gas flow meter is provided on the pipeline between the valve and the inert gas injection port.

[0012] As a further improvement of the utility model, one end of the aerator is connected to the inert gas injection port, and the other end of the aerator is arranged at the lower end of the interior of the Raney nickel synthesis reactor.

[0013] As a further improvement of the utility model, the induced draft fan is connected to the induced draft exhaust port through a pipeline, and a valve is provided on the pipeline.

[0014] As a further improvement of the present invention, the screw feeder is fixedly connected to the material feeding port, and a storage bin is provided on the top of the screw feeder.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model provides a Raney nickel industrial synthesis system, which can ensure the uniformity and temperature control of the activation process and improve the synthesis efficiency and quality of the catalyst through the design of the internal agitator and the outer wall heat exchange jacket of the Raney nickel synthesis kettle, as well as the pipeline connection with the pure water supply device, the alkali solution dosing pump, the constant temperature heat exchanger and other equipment. Through the effective connection of the pipeline and the valve, the precise control and regulation of the material flow are realized, and the flexibility and convenience of the production process are enhanced.

[0017] 2. The utility model provides a Raney nickel industrial synthesis system that accurately measures and controls the amount of alkali solution added and the injection of inert gas into the kettle through the liquid flow meter and aerator. The advantages of this design are that the stability of the activation reaction is ensured, the synthesis quality of Raney nickel is improved, and the hydrogen generated during the activation process is effectively eliminated through the use of the induced draft fan, greatly reducing the safety risk.

[0018] 3. The induced draft fan and the Raney nickel synthesis agitator provided in the Raney nickel industrial synthesis system provided by the utility model are both explosion-proof. Since flammable hydrogen will be generated during the activation process of Raney nickel, the induced draft fan and the agitator using explosion-proof treatment can effectively prevent the sparks caused by equipment failure or improper operation from causing explosion accidents, thereby ensuring the safety of the production process.

[0019] 4. The utility model provides a Raney nickel industrial synthesis system which uses a spiral feeder to slowly add materials, combines stirring with an agitator, aeration and dilution with an inert gas source, and an induced draft fan to ensure a slightly negative pressure state in the system, thereby achieving the industrial safety production requirements of Raney nickel and avoiding the risk of flammability and explosion during the synthesis process. It provides equipment guarantee for the large-scale industrial production of Raney nickel prepared by leaching nickel-aluminum alloy with sodium hydroxide solution, and has positive market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the Raney nickel industrial synthesis system of the utility model.

[0021] Figure 2 The utility model is a schematic diagram of the structure of a Raney nickel synthesis kettle in a Raney nickel industrial synthesis system.

[0022] Reference numerals

[0023] 1-pure water supply device; 2-alkali solution preparation kettle; 3-alkali solution dosing pump; 31-liquid flow meter; 4-constant temperature heat exchanger; 5-screw feeder; 51-storage bin; 6-inert gas source; 61-gas flow meter; 7-Raney nickel synthesis kettle; 71-agitator; 72-heat exchange jacket; 73-induced draft exhaust port; 74-alkali solution dosing port; 75-inert gas dosing port; 76-material dosing port; 77-aerator; 78-cooling liquid inlet; 79-cooling liquid outlet; 710-discharge valve; 8-induced draft fan; 9-No. 1 three-way pipe; 10-No. 2 three-way pipe. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0026] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0027] Please refer to Figure 1 and Figure 2 The utility model provides a Raney nickel industrial synthesis system, which includes a Raney nickel synthesis reactor 7 and an auxiliary system. The Raney nickel synthesis reactor 7 includes a stirrer 71 arranged inside the Raney nickel synthesis reactor 7, a heat exchange jacket 72 arranged outside the Raney nickel synthesis reactor 7, an air inlet 73, an alkali solution feeding port 74, an inert gas feeding port 75, and a material feeding port 76 respectively arranged on the upper part of the outer wall of the Raney nickel synthesis reactor 7, and an aerator 77 connected to the inert gas feeding port 75. , a coolant inlet 78 and a discharge port 710 are arranged at the lower part of the outer wall of the heat exchange jacket 72, and a coolant outlet 79 is arranged at the side of the outer wall of the heat exchange jacket 72; the auxiliary system includes a pure water supply device 1, an alkali solution dosing pump 3, a constant temperature heat exchanger 4, an inert gas source 6, an induced draft fan 8 and a screw feeder 5 respectively connected to the Raney nickel synthesis reactor 7, an alkali solution preparation reactor 2 connected to the pure water supply device 1, and a No. 1 tee pipe 9 and a No. 2 tee pipe 10 for diversion.

[0028] See also Figure 1, the first port of the No. 1 three-way pipe 9 is connected to the pure water supply device 1 through a pipeline, and a valve is provided on the pipeline; the second port of the No. 1 three-way pipe 9 is connected to the alkali solution preparation kettle 2 through a pipeline, and a valve is provided on the pipeline; the third port of the No. 1 three-way pipe 9 is connected to the first port of the No. 2 three-way pipe 10 through a pipeline, and the pipeline is provided with a valve. Such a configuration can realize flexible switching and flow control between pure water, alkali solution and the No. 2 three-way pipe 10. Such a design is convenient for adjusting the supply of pure water and alkali solution, ensuring that the alkali solution preparation kettle 2 can effectively receive pure water for the preparation of alkali solution, and at the same time, the prepared alkali solution can be transported to the subsequent process flow through the No. 2 three-way pipe 10. The presence of the valve makes the entire system have higher operational flexibility and control accuracy, and is convenient for adjusting the flow rate and the flow direction of materials according to production needs.

[0029] See also Figure 1 , one end of the alkali solution dosing pump 3 is connected to the alkali solution preparation kettle 2 through a pipeline, and a valve is provided on the pipeline. The other end of the alkali solution dosing pump 3 is connected to the second port of the No. 2 tee pipe 10 through a pipeline, and a valve is provided on the pipeline. A liquid flowmeter 31 is provided on the pipeline between the valve and the alkali solution dosing pump 3. The third port of the No. 2 tee pipe 10 is connected to the alkali solution dosing port 74 through a pipeline, and a valve is provided on the pipeline. With such a configuration, accurate metering and controllable delivery of alkali solution can be achieved, ensuring that alkali solution is added to the reaction system as needed, and improving reaction efficiency and system safety.

[0030] See also Figure 1 The liquid outlet of the thermostatic heat exchanger 4 is connected to the coolant inlet 78 through a pipeline, and a valve is provided on the pipeline; the liquid inlet of the thermostatic heat exchanger 4 is connected to the coolant outlet 79 through a pipeline, and a valve is provided on the pipeline. Such an arrangement can achieve precise control of the temperature during the synthesis process of Raney nickel, keep the temperature in the synthesis reactor stable, and is conducive to improving product quality and system stability.

[0031] See also Figure 1 The inert gas source 6 is connected to the inert gas injection port 75 through a pipeline, and a valve is provided on the pipeline; a gas flow meter 61 is provided on the pipeline between the valve and the inert gas injection port 75. The inert gas source 6 can be a replaceable gas cylinder or gas station such as nitrogen, argon, carbon dioxide, etc. Such a setting can provide flexible inert gas selection to meet different synthesis process requirements, accurately control the dosage of inert gas, ensure the stability of gas during the reaction, and improve the purity of the product and the safety of the system.

[0032] See also Figure 2One end of the aerator 77 is connected to the inert gas injection port 75, and the other end of the aerator 77 is arranged at the lower end of the interior of the Raney nickel synthesis reactor 7. Such an arrangement can ensure that the inert gas is evenly distributed and fully contacts the reaction medium, promotes the uniformity of the reaction and improves the reaction efficiency, and at the same time helps to remove the oxygen in the reactor, reduce the risk of oxidation reaction, and ensure the safety of the reaction and the quality of the product.

[0033] See also Figure 1 The induced draft fan 8 is connected to the induced draft exhaust port 73 through a pipeline, and a valve is provided on the pipeline. The induced draft fan 8 and the agitator 71 are both explosion-proof. In this way, the harmful gas and steam generated by the reaction can be effectively removed during the Raney nickel synthesis process, while preventing the risk of explosion caused by gas leakage, ensuring the safety of operators and the stable operation of the equipment.

[0034] See also Figure 1 The screw feeder 5 is fixedly connected to the material feeding port 76, and a storage bin 51 is arranged on the top of the screw feeder 5. Such arrangement enables continuous and quantitative addition of materials and maintains the stability of the synthesis process. The storage bin 51 arranged on the top can ensure that the materials are evenly fed into the synthesis reactor, while facilitating material storage and transportation, thereby improving production efficiency and convenience of operation.

[0035] The working principle of the present invention is further described below with reference to specific embodiments:

[0036] Switch the pipeline valve, start the pure water supply device 1 to supply a specified amount of pure water to the alkali solution preparation kettle 2 through the No. 1 three-way pipe 9, add sodium hydroxide to prepare a sodium hydroxide aqueous solution, and after the sodium hydroxide solution in the alkali solution preparation kettle 2 drops to room temperature, open the relevant pipeline valves and start the alkali solution adding pump 3 to quickly pump the sodium hydroxide solution in the alkali solution preparation kettle 2 through the alkali solution adding port 74 and the No. 2 three-way pipe 10 to the Raney nickel synthesis kettle 7 in turn. At the same time, the constant temperature heat exchanger 4 is started to pump the refrigerant through the coolant inlet 78 to the heat exchange jacket 72 to cool and exchange heat with the Raney nickel synthesis kettle 7, and then return it to the constant temperature heat exchanger 4 through the coolant outlet 79. When the temperature of the constant temperature heat exchanger 4 reaches the specified requirement, the induced draft fan 8 is started to form a negative pressure state inside the Raney nickel synthesis kettle 7 through the induced draft exhaust port 73, and the Raney nickel is started at this time. The agitator 71 of the synthesis reactor 7 starts to mix and stir the sodium hydroxide solution, adjust the opening angle of the valve of the pipeline of the inert gas source 6 and observe the gas flowmeter 61, the inert gas source 6 starts to aerate the sodium hydroxide in the reactor through the inert gas feeding port 75 and the aerator 77, and finally the screw feeder 5 is started to slowly add the reaction material through the material feeding port 76. The reaction material completes the leaching reaction with the sodium hydroxide solution under the stirring of the agitator 71 in the reactor. The hydrogen generated in the synthesis process is diluted by the inert gas and discharged from the Raney nickel synthesis reactor 7 through the induced draft exhaust port 73 and the induced draft fan 8. After the material addition is completed, the screw feeder 5, the inert gas source 6, the constant temperature heat exchanger 4, the agitator 71 are turned off in turn, and finally the induced draft fan 8 is turned off. According to the subsequent process requirements, the generated Raney nickel slurry can be discharged through the discharge port 710 at the bottom of the Raney nickel synthesis reactor 7.

[0037] In summary, the utility model provides a Raney nickel industrial synthesis system, which realizes the automation and continuity of the Raney nickel synthesis process through precise pipeline connection and equipment configuration. The various components in the system, such as the pure water supply device 1, the alkali solution dosing pump 3, the constant temperature heat exchanger 4, the inert gas source 6, the induced draft fan 8 and the screw feeder 5, work together to ensure the precise control of the reaction conditions and improve the production efficiency and product quality. The stability and safety of the reaction are guaranteed by the real-time monitoring of the liquid flow meter 31 and the gas flow meter 61, and the uniform dispersion of the aerator 77. The explosion-proof induced draft fan 8 and the agitator 71 further reduce the safety risks. The whole system is reasonably designed, easy to operate, and has good market application prospects.

[0038] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A Raney nickel industrial synthesis system, characterized in that: The invention comprises a Raney nickel synthesis kettle and an auxiliary system, wherein the Raney nickel synthesis kettle comprises an agitator arranged inside the Raney nickel synthesis kettle, a heat exchange jacket arranged outside the Raney nickel synthesis kettle, an induced draft exhaust port, an alkali solution feeding port, an inert gas feeding port, and a material feeding port respectively arranged on the upper part of the outer wall of the Raney nickel synthesis kettle, an aerator connected to the inert gas feeding port, a coolant inlet and a discharge port arranged on the lower part of the outer wall of the heat exchange jacket, and a coolant outlet arranged on the side of the outer wall of the heat exchange jacket; the auxiliary system comprises a pure water supply device, an alkali solution feeding pump, a constant temperature heat exchanger, an inert gas source, an induced draft fan, and a screw feeder respectively connected to the Raney nickel synthesis kettle, an alkali solution preparation kettle connected to the pure water supply device, and a No. 1 tee pipe and a No. 2 tee pipe for diversion.

2. The Raney nickel industrial synthesis system according to claim 1, characterized in that: The first port of the No. 1 tee is connected to the pure water supply device through a pipeline, and a valve is provided on the pipeline; the second port of the No. 1 tee is connected to the alkali solution preparation kettle through a pipeline, and a valve is provided on the pipeline; the third port of the No. 1 tee is connected to the first port of the No. 2 tee through a pipeline, and a valve is provided on the pipeline.

3. The Raney nickel industrial synthesis system according to claim 1, characterized in that: One end of the alkali solution dosing pump is connected to the alkali solution preparation kettle through a pipeline, and a valve is arranged on the pipeline.

4. The Raney nickel industrial synthesis system according to claim 3, characterized in that: The other end of the alkali solution dosing pump is connected to the second port of the No. 2 tee pipe through a pipeline, a valve is arranged on the pipeline, and a liquid flow meter is arranged on the pipeline between the valve and the alkali solution dosing pump.

5. The Raney nickel industrial synthesis system according to claim 1, characterized in that: The third port of the No. 2 tee pipe is connected to the alkali solution addition port through a pipeline, and a valve is arranged on the pipeline.

6. The Raney nickel industrial synthesis system according to claim 1, characterized in that: The liquid outlet of the thermostatic heat exchanger is connected to the coolant inlet through a pipeline, and a valve is provided on the pipeline; the liquid inlet of the thermostatic heat exchanger is connected to the coolant outlet through a pipeline, and a valve is provided on the pipeline.

7. The Raney nickel industrial synthesis system according to claim 1, characterized in that: The inert gas source is connected to the inert gas injection port through a pipeline, and a valve is arranged on the pipeline; a gas flow meter is arranged on the pipeline between the valve and the inert gas injection port.

8. The Raney nickel industrial synthesis system according to claim 1, characterized in that: One end of the aerator is connected to the inert gas injection port, and the other end of the aerator is arranged at the lower end of the interior of the Raney nickel synthesis reactor.

9. The Raney nickel industrial synthesis system according to claim 1, characterized in that: The induced draft fan is connected to the induced draft exhaust port through a pipeline, and a valve is arranged on the pipeline.

10. The Raney nickel industrial synthesis system according to claim 1, characterized in that: The screw feeder is fixedly connected to the material feeding port, and a storage bin is arranged on the top of the screw feeder.

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