A continuous passivation device for a nickel-based catalyst

Abstract

The utility model belongs to chemical preparation technical field, concretely is a kind of nickel-based catalyst sustained passivation device, including frame, water guide jar, centrifugal pump, reactor, liquid discharge pipeline, main pool, overflow pool and liquid pumping pipeline, and the spare liquid subassembly is installed in the main pool;The spare liquid subassembly includes the stirring mechanism installed in the main pool and the liquid discharge mechanism assembled on the stirring mechanism;The liquid discharge mechanism includes the float inserted in the stirring mechanism, the water pumping channel with the opening downwards being formed in the float, the water pumping pipe connected to the float, the bellows connected to the water pumping pipe end part.The utility model can use the float of the stirring shaft to float on the liquid surface to play positioning effect, so that the water inlet of water pumping channel bottom can float with liquid level, and bellows is compressed in the process of floating, and the length is adjusted adaptively, and positioning pipe plays the guiding effect to bellows and water pumping pipe, guarantees the stability of pumping.

Description

Technical Field

[0001] This utility model relates to the field of chemical preparation technology, specifically to a nickel-based catalyst continuous passivation device. Background Technology

[0002] Sodium nitrate solution is commonly used as a passivating agent in the passivation process of nickel-based catalysts. In existing technologies, sodium nitrate solution is usually extracted from top to bottom to avoid agitating any undissolved solids that may be present when directly extracting the solution from the bottom of the container, which could affect the solution homogeneity and dissolution efficiency.

[0003] However, in actual continuous production or continuous replenishment processes, the bottom of the fixedly installed extraction pipe is difficult to maintain at a suitable position near the liquid surface due to constant changes in liquid level. If the bottom of the extraction pipe is too high, it can easily lead to solution cavitation or gas intake, affecting the stability of the transport process; if the position is too low, it may disturb the bottom sediment and affect the continuous dissolution of subsequent solids. Currently, the height of the extraction pipe usually needs to be manually adjusted frequently according to changes in liquid level, which not only increases the complexity of operation but also affects the continuity and controllability of the passivation process. Therefore, it is necessary to provide a device that allows the outlet of the extraction pipe to automatically float with the liquid level and always remain at a suitable position near the liquid surface, in order to improve the operational convenience and process stability of the sodium nitrate solution extraction process. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows: A nickel-based catalyst continuous passivation device includes a frame, a water tank, a centrifugal pump, a reactor, a drain pipe, a main tank, an overflow tank, and a pumping pipe. A liquid preparation assembly is installed in the main tank. The liquid preparation assembly includes a stirring mechanism installed in the main tank and a draining mechanism mounted on the stirring mechanism. The draining mechanism includes a float inserted into the stirring mechanism, a downward-facing pumping channel within the float, a pumping pipe connected to the float, a corrugated pipe connected to the end of the pumping pipe, a positioning pipe located outside the corrugated pipe and sleeved with the pumping pipe, a positioning groove at the bottom of the positioning pipe, and a positioning strip fixed to the side of the pumping pipe and engaged in the positioning groove.

[0006] Furthermore, the stirring mechanism includes a motor installed at the bottom of the main tank, a stirring shaft fixed to the drive end of the motor, and a stirring rod installed on the stirring shaft.

[0007] Furthermore: a material carrier plate is installed on the stirring shaft, and a material drop hole is provided on the material carrier plate.

[0008] Furthermore, both the upper and lower surfaces of the float are conical.

[0009] Furthermore, a liquid level sensor is installed inside the main pool.

[0010] Furthermore, the water pumping pipe is made of high-density polyethylene.

[0011] The above-mentioned technical solution of this utility model has the following beneficial technical effects: 1. This utility model, through the liquid preparation component, utilizes a float mounted on the stirring shaft to float on the liquid surface for positioning, allowing the water inlet at the bottom of the pumping channel to float with the liquid level. During the upward movement, the bellows is compressed, allowing for adaptive length adjustment. At the same time, the positioning tube guides the bellows and the pumping pipe, ensuring the stability of the material pumping.

[0012] 2. This utility model uses a material carrier plate fixed on a stirring shaft. When sodium nitrate solid is added to the main tank, it will fall onto the material carrier plate. At the same time, the motor drives the material carrier plate to rotate. During the process, water solvent is continuously added, so that the two can be mixed and fall through the discharge hole at the same time. Compared with the method where sodium nitrate accumulates at the bottom and dissolves, this method has a better mixing effect and a higher dissolution rate. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the nickel-based catalyst continuous passivation device of this utility model; Figure 2 This is an enlarged view of section A of the nickel-based catalyst continuous passivation device of this utility model; Figure 3 This is a cross-sectional view of the positioning tube of this utility model.

[0014] Figure label: 110. Frame; 120. Water tank; 130. Centrifugal pump; 140. Reactor; 150. Drainage pipe; 160. Main tank; 161. Liquid level sensor; 170. Overflow tank; 180. Pumping pipe; 200. Liquid preparation assembly; 210. Float; 220. Pumping channel; 230. Pumping pipe; 231. Material carrier plate; 232. Material drop hole; 240. Corrugated pipe; 250. Positioning pipe; 260. Positioning groove; 270. Positioning strip; 310. Motor; 320. Stirring shaft; 330. Stirring rod. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0016] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0017] The following describes, with reference to the accompanying drawings, some embodiments of a nickel-based catalyst continuous passivation device provided by this utility model.

[0018] Combination Figures 1-3 As shown, the present invention provides a nickel-based catalyst continuous passivation device, including a frame 110, a water tank 120, a centrifugal pump 130, a reactor 140, a drain pipe 150, a main tank 160, an overflow tank 170, and a pumping pipe 180, characterized in that: a liquid preparation component 200 is installed in the main tank 160.

[0019] The liquid preparation assembly 200 includes a stirring mechanism installed in the main tank 160 and a draining mechanism mounted on the stirring mechanism. The draining mechanism includes a float 210 inserted into the stirring mechanism, a downward-facing water pumping channel 220 opened within the float 210, a water pumping pipe 230 connected to the float 210, a corrugated pipe 240 connected to the end of the water pumping pipe 230, a positioning pipe 250 located outside the corrugated pipe 240 and sleeved with the water pumping pipe 230, and a positioning pipe 250 opened in the positioning pipe 250. The positioning groove 260 at the bottom of the 50 and the positioning strip 270 fixed to the side of the pumping pipe 230 and clamped in the positioning groove 260, through the liquid preparation assembly 200, can float on the liquid surface using the float 210 mounted on the stirring shaft 320 to achieve a positioning effect, so that the water inlet at the bottom of the pumping channel 220 can float with the liquid level, and will compress the corrugated pipe 240 during the floating process, adaptably adjusting the length. At the same time, the positioning tube 250 plays a guiding role for the corrugated pipe 240 and the pumping pipe 230, ensuring the stability of the material pumping.

[0020] Specifically, the stirring mechanism includes a motor 310 installed at the bottom of the main tank 160, a stirring shaft 320 fixed to the drive end of the motor 310, and a stirring rod 330 installed on the stirring shaft 320. A material carrier plate 231 is installed on the stirring shaft 320, and a material drop hole 232 is opened on the material carrier plate 231. When sodium nitrate solid is added to the main tank 160, it will fall onto the material carrier plate 231 through the material carrier plate 231 fixed on the stirring shaft 320. At the same time, the motor 310 drives the material carrier plate 231 to rotate. During the process, water solvent is continuously added, so that the two can be mixed and fall through the material drop hole 232. Compared with the sodium nitrate accumulating at the bottom and dissolving, this method has a better mixing effect and a higher dissolution rate.

[0021] Furthermore, the upper and lower surfaces of the float 210 are both conical. The upper conical surface can prevent the material from accumulating, and the lower conical surface can prevent excessive material from obstructing the water flow channel 220. Liquid can only be discharged after the liquid surface has submerged the water flow channel 220. The design is quite reasonable.

[0022] On the other hand, a liquid level sensor 161 is installed in the main tank 160. The liquid level sensor 161 can monitor the amount of sodium nitrate solution stored in the main tank 160 to avoid too much or too little.

[0023] Furthermore, the water pumping pipe 230 is made of high-density polyethylene. High-density polyethylene pipes are lightweight and suitable for use in sodium nitrate solutions. They have a thin-walled structure and can move up and down with the float 210, making them highly practical.

[0024] Specifically, this solution also includes a controller, which is a general-purpose industrial controller. Its core hardware structure includes a general-purpose microprocessor CPU, RAM / ROM memory, and input / output (I / O) interface modules. This controller connects to conventional electrical equipment such as motors and sensors involved in the solution through its I / O interfaces and runs preset control programs or algorithms.

[0025] The above controller has the following control methods: Program-controlled, automatic mode: The controller runs a preset control program or algorithm, based on sensor input or preset logic, to automatically realize the start-stop, state switching, timing control and linkage functions of various electrical equipment.

[0026] Manual control, local / remote mode: The controller is equipped with a manual control interface, such as physical buttons, a touch screen, an HMI, or a remote command receiving module. Operators can directly send commands to the controller through this interface to independently / separately control any specified electrical device, such as the start / stop or status adjustment of a specific motor or sensor. This mode is typically used for commissioning, maintenance, or specific operational needs. The controller has a mode switching function, allowing for safe switching between automatic program control and manual control.

[0027] The control program, manual operation logic, and mode switching mechanism are all implemented based on specific application requirements. The specific model of the processor, storage capacity, I / O interface protocol, and the specific form of the manual control interface can be determined by those skilled in the art based on the specifications of the selected general controller, the characteristics of the controlled device, and conventional human-machine interaction requirements. These are common implementation methods in the prior art and can be understood by those skilled in the art, so there is no need to elaborate on the specific details.

[0028] The working principle and usage process of this utility model are as follows: First, the water tank 120 is filled with water. The centrifugal pump 130 draws water from the water tank 120 and transports it to the reactor 140 to cool the reactor 140. The water in the reactor 140 can enter the main tank 160 through the drain pipe 150 and react with the sodium nitrate solid in the main tank 160 to form a sodium nitrate solution. Then, the centrifugal pump 130 can be used to draw sodium nitrate solution from the main tank 160 and transport it to the reactor 140. The nickel-based catalyst in the reactor 140 undergoes a passivation reaction with the sodium nitrate solution to form a nickel oxide film.

[0029] The various electrical devices mentioned in this application are all conventional or standard components that achieve their corresponding functions. Those skilled in the art, based on their professional knowledge and the teachings of this application, can select appropriate models and specifications for implementation without creative effort. The exact models of these components are not the innovation of this invention, and minor differences in their specific specifications do not affect the realization of the core technical effects of this application; therefore, they are not individually limited in the specification.

[0030] The terms "fixed," "installed," "connected," "set up," "open," "equipped with," "embedded," and "assembled" used in this manual to describe the position or relationship of components all refer to conventional physical connections or spatial configurations that can be understood and implemented by those skilled in the art based on the function of the relevant components, the context, and common knowledge. These relationships encompass, but are not limited to, specific forms such as welding, bonding, threaded fastening, snap-fit, interference fit, plug-in, sliding fit, hinge, integral molding, adjacent arrangement, and opening or slot accommodating. Their purpose is to clearly describe the relative positions, mating methods, and functional implementation paths between components, rather than limiting a single specific structural detail. To ensure a smooth and concise reading experience and ease of understanding, no separate explanation is provided after each term.

[0031] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A nickel-based catalyst continuous passivation device, comprising a frame (110), a water inlet tank (120), a centrifugal pump (130), a reactor (140), a discharge pipe (150), a main tank (160), an overflow tank (170), and a pumping pipe (180), characterized in that: The main tank (160) is equipped with a backup liquid assembly (200). The liquid preparation assembly (200) includes a stirring mechanism installed in the main tank (160) and a liquid discharge mechanism assembled on the stirring mechanism; The drainage mechanism includes a float (210) inserted into the stirring mechanism, a water pumping channel (220) with its opening facing downward in the float (210), a water pumping pipe (230) connected to the float (210), a corrugated pipe (240) connected to the end of the water pumping pipe (230), a positioning pipe (250) disposed outside the corrugated pipe (240) and sleeved with the water pumping pipe (230), a positioning groove (260) opened at the bottom end of the positioning pipe (250), and a positioning strip (270) fixed to the side of the water pumping pipe (230) and fitted into the positioning groove (260).

2. The nickel-based catalyst continuous passivation device according to claim 1, characterized in that, The stirring mechanism includes a motor (310) installed at the bottom of the main tank (160), a stirring shaft (320) fixed to the drive end of the motor (310), and a stirring rod (330) installed on the stirring shaft (320).

3. The nickel-based catalyst continuous passivation device according to claim 2, characterized in that, A material carrier plate (231) is installed on the stirring shaft (320), and a material drop hole (232) is provided on the material carrier plate (231).

4. The nickel-based catalyst continuous passivation device according to claim 1, characterized in that, The upper and lower surfaces of the float (210) are both conical.

5. The nickel-based catalyst continuous passivation device according to claim 1, characterized in that, A liquid level sensor (161) is installed inside the main pool (160).

6. The nickel-based catalyst continuous passivation device according to claim 1, characterized in that, The water pumping pipe (230) is made of high-density polyethylene.

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