Sodium borohydride solids batch charging device

Abstract

The utility model discloses a sodium borohydride solid batch feeding device relates to fine chemical industry field. Sodium borohydride solid batch feeding device, including mixing tank, the mixing tank is fixedly connected with the liquid injection pipe of communication still, include: apron, dismounting connection on the mixing tank, set up the blanking tube on the apron, and communicate with the mixing tank, the storage tank is fixedly installed on the apron, and communicate with blanking tube, rotation connects on the apron and rotates the disc, embeds blanking tube, wherein, the blanking tube is communicated with the blanking port of setting up on the rotating disc, and the utility model discloses, through cam and spring drive knock stick high frequency reciprocating knock blanking tube, make blanking tube produce vibration, and timely shake off the probability of caking, hanging wall material, effectively reduced blanking tube block, guarantee the continuity of the feeding process, compared with traditional manual cleaning or passive dredging, effectively reduce the shutdown and maintenance cost, ensure long -term stable operation, improve production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of fine chemical technology, specifically, it relates to a batch feeding device for sodium borohydride solid. Background Technology

[0002] In the field of fine chemicals, sodium borohydride is a commonly used reducing agent and is widely used in reactions such as carbonyl reduction. Since it produces hydrogen and releases heat when it reacts with solvents such as methanol and ethanol, it is usually necessary to use a batch feeding method to avoid violent reactions caused by a single feeding. In this process, the feed pipe, as the conveying channel for sodium borohydride solid, directly affects the continuity of feeding and the stability of the reaction. Therefore, the anti-clogging design of the feed pipe is the key to the efficient operation of the equipment.

[0003] Currently, traditional sodium borohydride feeding devices mostly rely on gravity for feeding, lacking an active anti-clogging mechanism. Because sodium borohydride is prone to absorbing moisture and clumping, and solid particles easily adhere to the pipe wall due to static electricity and stickiness, the feeding pipe is very prone to blockage. After blockage, manual shutdown and cleaning are required, which not only interrupts the production process and increases downtime, but also requires additional labor costs. If the blockage is not detected in time, the accumulation of material may lead to uneven feeding in the subsequent process, affecting reaction efficiency and product quality. In severe cases, it may even cause safety hazards such as a sudden increase in pressure inside the pipe, making it difficult to meet the needs of continuous and large-scale production. In view of this, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a sodium borohydride solid batch feeding device that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A batch feeding device for solid sodium borohydride includes a mixing tank with a liquid injection pipe fixedly connected to it, and further includes: a cover plate detachably connected to the mixing tank; a discharge pipe disposed on the cover plate and connected to the mixing tank; a storage tank fixedly installed on the cover plate and connected to the discharge pipe; a rotating disk rotatably connected to the cover plate and embedded in the discharge pipe, wherein the rotating disk has a discharge port connected to the discharge pipe; a connecting seat fixedly connected to the discharge pipe, wherein a striking rod is slidably connected to the connecting seat, a push plate is fixedly connected to one end of the striking rod, and a fixing ring is fixedly connected to the striking rod; a spring sleeved on the striking rod, one end of which is fixedly connected to the connecting seat and the other end of which is fixedly connected to the fixing ring; and a cam rotatably connected to the cover plate and used to cooperate with the spring to drive the striking rod to reciprocate to strike the discharge pipe.

[0007] In order to drive the cam to rotate, preferably, a second motor is fixedly installed on the cover plate, and the cam is fixedly connected to the output end of the second motor.

[0008] In order to drive the rotating disk to rotate intermittently, thereby allowing the material in the storage tank to be added to the mixing tank in batches, a rotating shaft is rotatably connected to the cover plate, the rotating disk is fixedly connected to the rotating shaft, a spur gear is fixedly connected to the rotating shaft, and a half gear is fixedly installed on the motor, the half gear meshing with the spur gear.

[0009] To facilitate the installation and removal of the cover plate, preferably, a fixing bolt is also included, and the cover plate is detachably connected to the upper end of the mixing tank by the fixing bolt.

[0010] For mixing materials, preferably, a rotating shaft is rotatably connected inside the mixing tank, and multiple sets of levers are fixedly connected at equal intervals on the rotating shaft. Each set of levers has multiple levers, and the multiple levers are circumferentially distributed on the outer wall of the rotating shaft. A motor is fixedly installed at the lower end of the mixing tank, and the lower end of the rotating shaft is fixedly connected to the output end of the motor.

[0011] In order to ensure that the material is evenly distributed in the mixing tank during feeding, the system further includes multiple deflectors, which are circumferentially and fixedly connected to the upper end of the rotating shaft.

[0012] To facilitate the discharge of materials from the mixing tank, preferably, a discharge pipe is fixedly connected to the bottom of the mixing tank, and a valve switch is provided on the discharge pipe.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0014] This invention utilizes a cam and spring to drive a striking rod to repeatedly strike the feeding pipe at high frequency, causing the pipe to vibrate and promptly dislodge clumps and materials adhering to the walls. This effectively reduces the probability of pipe blockage and ensures the continuity of the feeding process. Compared to traditional methods that rely on manual cleaning or passively waiting for blockages to clear, this proactive anti-blockage mechanism greatly reduces equipment downtime and maintenance costs caused by blockages. Even during long-term continuous production, the continuous striking vibration can maintain the unobstructed flow of the feeding pipe, ensuring stable operation of the device and improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the mixing tank, cover plate, and storage tank of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3This is a sectional view of the feeding tube, rotating disc, striking rod, and connecting seat of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of this utility model;

[0019] Figure 5 This is a utility model Figure 2 Enlarged view of part A in the middle.

[0020] In the diagram: 1. Mixing tank; 101. Cover plate; 102. Injection pipe; 103. Discharge pipe; 2. Rotating shaft; 201. Lever; 202. Lever plate; 203. Motor 1; 3. Storage tank; 301. Discharge pipe; 302. Rotating disc; 303. Discharge port; 304. Rotating shaft; 305. Circular gear; 306. Motor 2; 307. Half gear; 4. Connecting seat; 401. Striking rod; 402. Spring; 403. Push plate; 404. Cam. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] Example 1:

[0023] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 A batch feeding device for solid sodium borohydride includes a mixing tank 1, with a liquid injection pipe 102 fixedly connected to the mixing tank 1. It also includes: a cover plate 101, detachably connected to the mixing tank 1; a discharge pipe 301 mounted on the cover plate 101 and connected to the mixing tank 1; a storage tank 3, fixedly mounted on the cover plate 101 and connected to the discharge pipe 301; and a rotating disk 302 rotatably connected to the cover plate 101, embedded in the discharge pipe 301, wherein the rotating disk 302 has a discharge port connected to the discharge pipe 301. The feed inlet is 303; the connecting seat 4 is fixedly connected to the feed tube 301, wherein the connecting seat 4 is slidably connected to the striking rod 401, the one end of the striking rod 401 is fixedly connected to the push plate 403, and the striking rod 401 is fixedly connected to the retaining ring; the spring 402 is sleeved on the striking rod 401, one end of which is fixedly connected to the connecting seat 4, and the other end is fixedly connected to the retaining ring; the cam 404 is rotatably connected to the cover plate 101 and is used to cooperate with the spring 402 to drive the striking rod 401 to reciprocate to strike the feed tube 301.

[0024] A second motor 306 is fixedly installed on the cover plate 101, and a cam 404 is fixedly connected to the output end of the second motor 306.

[0025] A rotating shaft 304 is rotatably connected to the cover plate 101, a rotating disk 302 is fixedly connected to the rotating shaft 304, a spur gear 305 is fixedly connected to the rotating shaft 304, and a half gear 307 is fixedly installed on the motor 306, and the half gear 307 meshes with the spur gear 305.

[0026] When in use, first fill the storage tank 3 with sodium borohydride solid raw material, and then inject the reaction solvent such as methanol or ethanol into the mixing tank 1 through the injection pipe 102;

[0027] Then, the second motor 306 is started. The output end of the second motor 306 starts to rotate, which drives the cam 404 fixedly connected to it to rotate synchronously. On the other hand, it drives the fixedly installed half gear 307 to rotate. During the rotation of the half gear 307, when it enters the meshing state with the spur gear 305 fixed on the rotating shaft 304, it will drive the spur gear 305 to rotate, which in turn drives the rotating shaft 304 and the rotating disk 302 fixed on the rotating shaft 304 to rotate. As the rotating disk 302 rotates, when the discharge port 303 rotates to align with the passage of the discharge pipe 301, the sodium borohydride solid in the storage tank 3 falls into the mixing tank 1 through the discharge pipe 301 and the discharge port 303 under the action of gravity, completing the feeding action of one batch.

[0028] When the half gear 307 disengages from the sprocket 305, the rotating disk 302 stops rotating, the discharge port 303 is misaligned with the discharge pipe 301, the passage is closed, the current batch feeding ends, and the cycle continues until the half gear 307 re-engages with the sprocket 305 to begin the next batch feeding cycle. This effectively avoids the risk of violent local reactions and rapid hydrogen accumulation caused by a large amount of material added at once, ensuring the safety of the reaction process. At the same time, a stable feeding rhythm helps to release the heat of reaction evenly and change the composition of the reaction system evenly, improving the stability of the reaction and the consistency of product quality. For example, in the carbonyl reduction reaction, precise batch feeding allows sodium borohydride to react with carbonyl compounds gradually and evenly, avoiding local over-reduction or insufficient reduction, and improving the yield and purity of the target product.

[0029] During the rotation of cam 404 driven by motor 306, the protruding part of cam 404 pushes push plate 403, which in turn drives the striking rod 401 to slide away from the feed pipe 301. At this time, the spring 402 sleeved on the striking rod 401 is compressed. When cam 404 rotates to the point where the concave part separates from push plate 403, the elastic restoring force of spring 402 pushes the striking rod 401 back, causing the end of striking rod 401 to strike the outer wall of feed pipe 301 and generate vibration, shaking off the sodium borohydride solids adhering to its inner wall, disrupting the stable state of material bridging and adhering to the wall inside the pipe, and maintaining the unobstructed flow of the feed channel. During the entire operation of motor 306, cam 404 rotates continuously and periodically, driving the striking rod 401 to repeatedly strike the feed pipe 301 at high frequency, promptly shaking off clumps and materials adhering to the wall, effectively reducing the probability of blockage in the feed pipe 301, and ensuring the continuity of the feeding process. Compared with the traditional method of relying on manual cleaning or passively waiting for blockage to be cleared, this active anti-blockage mechanism greatly reduces equipment downtime and manual maintenance costs caused by blockage. Even in long-term continuous production, the feed pipe 301 can be kept unobstructed by continuous striking vibration, ensuring stable operation of the device and improving production efficiency.

[0030] Example 2:

[0031] Reference Figure 1 The sodium borohydride solid batch feeding device is basically the same as that in Example 1. However, a rotating shaft 2 is rotatably connected inside the mixing tank 1. Multiple sets of levers 201 are fixedly connected at equal intervals on the rotating shaft 2. Each set of levers 201 has multiple levers, and the multiple levers 201 are circumferentially distributed on the outer wall of the rotating shaft 2. A motor 203 is fixedly installed at the lower end of the mixing tank 1, and the lower end of the rotating shaft 2 is fixedly connected to the output end of the motor 203.

[0032] It also includes multiple dial plates 202, which are circumferentially and fixedly connected to the upper end of the rotating shaft 2.

[0033] When motor 203 is started, the output end of motor 203 rotates, which drives the rotating shaft 2 fixedly connected to it to rotate, thereby causing multiple sets of levers 201 fixedly connected at equal intervals on the rotating shaft 2 and multiple lever plates 202 fixedly connected at equal intervals on the circumference of the upper end of the rotating shaft 2 to rotate synchronously.

[0034] When sodium borohydride solid falls into mixing tank 1 from feed pipe 301 and feed port 303, the rotating plate 202 at the upper end of the rotating shaft 2 impacts and agitates the falling solid material, breaking up any clumps or concentrated falling solid material, dispersing it, and allowing it to fall more evenly into the solvent in mixing tank 1. This avoids violent reactions caused by excessively high local material concentrations (such as local hydrogen generation or material overflow), and also facilitates more even mixing by the subsequent lever 201. During the rotation of the rotating shaft 2, multiple sets of levers 201 move in a circular motion within the solvent in mixing tank 1, stirring the solvent and the sodium borohydride solid that has fallen into the solvent, promoting the diffusion and dissolution of sodium borohydride solid in the solvent, accelerating the reaction rate, and allowing the reaction heat and generated gases (such as hydrogen) to be released more evenly, further ensuring the safe, stable, and complete progress of the reaction, and improving product quality.

[0035] Example 3:

[0036] Reference Figure 1 The sodium borohydride solid batch feeding device is basically the same as that in Example 1. Furthermore, it also includes fixing bolts, and the cover plate 101 is detachably connected to the upper end of the mixing tank 1 by fixing bolts.

[0037] Cover the top of the mixing tank 1 with the cover plate 101, align the bolt holes, insert the fixing bolts and tighten them to make the cover plate 101 and the mixing tank 1 sealed connection. In specific implementation, a sealing gasket can also be used to enhance the airtightness (not shown in the figure).

[0038] After production is completed, when it is necessary to clean the inside of the mixing tank 1, loosen and remove the fixing bolts, lift the cover plate 101 upwards to expose the internal space of the mixing tank 1, so as to facilitate the staff to clean the inside of the tank.

[0039] The bottom of the mixing tank 1 is fixedly connected to a discharge pipe 103, and a valve switch is installed on the discharge pipe 103;

[0040] After the reaction is complete, the valve on the discharge pipe 103 is opened. At this time, the reaction liquid containing the product can be discharged from the mixing tank 1 by gravity through the discharge pipe 103, in preparation for the next batch of production.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model.

Claims

1. A batch feeding device for solid sodium borohydride, comprising a mixing tank (1), wherein a liquid injection pipe (102) is fixedly connected to the mixing tank (1), characterized in that, Also includes: The cover plate (101) is detachably connected to the mixing tank (1); The discharge pipe (301) is provided on the cover plate (101) and is connected to the mixing tank (1); The storage tank (3) is fixedly installed on the cover plate (101) and connected to the discharge pipe (301); A rotating disk (302) rotatably connected to the cover plate (101) is embedded in the feeding pipe (301), wherein the rotating disk (302) is provided with a feeding port (303) communicating with the feeding pipe (301); A connecting seat (4) is fixedly connected to the feeding tube (301). A striking rod (401) is slidably connected to the connecting seat (4). A push plate (403) is fixedly connected to one end of the striking rod (401). A fixing ring is fixedly connected to the striking rod (401). The spring (402) sleeved on the striking rod (401) has one end fixedly connected to the connecting seat (4) and the other end fixedly connected to the fixing ring; The cam (404) is rotatably connected to the cover plate (101) and is used to cooperate with the spring (402) to drive the striking rod (401) to reciprocate to strike the feed tube (301).

2. The sodium borohydride solid batch feeding device according to claim 1, characterized in that, A second motor (306) is fixedly installed on the cover plate (101), and the cam (404) is fixedly connected to the output end of the second motor (306).

3. The sodium borohydride solid batch feeding device according to claim 2, characterized in that, A rotating shaft (304) is rotatably connected to the cover plate (101), the rotating disk (302) is fixedly connected to the rotating shaft (304), a spur gear (305) is fixedly connected to the rotating shaft (304), and a half gear (307) is fixedly installed on the motor (306), the half gear (307) meshing with the spur gear (305).

4. The sodium borohydride solid batch feeding device according to claim 1, characterized in that, It also includes fixing bolts, and the cover plate (101) is detachably connected to the upper end of the mixing tank (1) by fixing bolts.

5. The sodium borohydride solid batch feeding device according to claim 1, characterized in that, The mixing tank (1) is rotatably connected to a rotating shaft (2). Multiple sets of levers (201) are fixedly connected at equal intervals on the rotating shaft (2). Each set of levers (201) has multiple levers. The multiple levers (201) are circumferentially distributed on the outer wall of the rotating shaft (2). A motor (203) is fixedly installed at the lower end of the mixing tank (1). The lower end of the rotating shaft (2) is fixedly connected to the output end of the motor (203).

6. The sodium borohydride solid batch feeding device according to claim 5, characterized in that, It also includes multiple dial plates (202), which are circumferentially fixedly connected to the upper end of the rotating shaft (2).

7. The sodium borohydride solid batch feeding device according to claim 1, characterized in that, The bottom of the mixing tank (1) is fixedly connected to a discharge pipe (103), and a valve switch is provided on the discharge pipe (103).

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