Sodium hydrosulfide solution decolorizing device

Abstract

The utility model provides a sodium hydrosulfide solution decolorizing device, and belongs to the technical field of sodium hydrosulfide solution processing. Comprising a reaction kettle, a stirring shaft is rotatably connected in the reaction kettle, and two round pipes fixedly penetrate through a kettle cover of the reaction kettle. Through the arrangement of the annular box, the inner dispersion boxes and the outer dispersion boxes, a potassium hydrogen sulfite solution flows into the annular box after passing through the round pipe, flows to the positions of the inner dispersion boxes and the outer dispersion boxes, is primarily dispersed by the inner dispersion boxes and the outer dispersion boxes, and is discharged from the bottoms of the inner dispersion boxes and the outer dispersion boxes; the discharged potassium bisulfite solution flows to a splitter plate of the shunting assembly and is shunted again by the splitter plate, and the splitter plate slowly rotates along with the stirring shaft in the shunting process, so that the dispersing area of the potassium bisulfite solution is increased, the potassium bisulfite solution is dispersed and then mixed with the sodium hydrosulfide solution, the stirring time for mixing the potassium bisulfite solution and the sodium hydrosulfide solution is shortened, and the stirring efficiency is improved. The reaction rate of the two is increased, so that the decolorization efficiency of the sodium hydrosulfide solution is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium hydrosulfide solution processing, in particular to a sodium hydrosulfide solution decolorization device. Background Art

[0002] Sodium hydrosulfide solution is a solution formed by mixing sodium hydrosulfide and water. In the dyeing industry, sodium hydrosulfide solution can reduce the color of some organic dyes to colorless or light color, thereby achieving decolorization. Sodium hydrosulfide solution is colorless or light yellow when it is just produced. As the storage time increases, the color of the sodium hydrosulfide solution will gradually deepen after being oxidized. Therefore, a reducing agent needs to be added to decolorize the sodium hydrosulfide solution before use. The sodium hydrosulfide solution is added to the reactor, and then potassium bisulfite solution is added to the reactor to react with the sodium hydrosulfide solution, thereby achieving decolorization of the sodium hydrosulfide solution. The sodium hydrosulfide solution can be used after decolorization.

[0003] After searching, the Chinese patent with the authorization announcement number CN105800567B discloses a method for producing a colorless sodium hydrosulfide solution. A reducing agent is added to a sodium hydrosulfide solution with a mass concentration of 32-50%, and the temperature is kept at 40-80°C, stirred for 0.5-3h, filtered to remove sulfur, and a protective gas is added for protection to obtain a colorless and transparent sodium hydrosulfide solution. The production method is simple to operate, the raw materials are easily available, easy to control, and the energy consumption is low. The obtained product can not only meet the needs of the fine chemical industry, but also improve the purity of downstream products and is easy to industrialize.

[0004] The decolorization treatment of the sodium hydrosulfide solution can be achieved by using the method recorded in the above patent. The above method is usually carried out in a reactor. When the reactor is used for decolorization, the potassium bisulfite solution is usually directly added to the reactor and mixed with the sodium hydrosulfide solution. However, the potassium bisulfite solution is directly added to the reactor without being dispersed. A long stirring time is required in the reactor to fully mix the potassium bisulfite solution and the sodium hydrosulfide solution. The decolorization efficiency of the sodium hydrosulfide solution needs to be improved. Therefore, the present application provides a sodium hydrosulfide solution decolorization device to meet the demand. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sodium hydrosulfide solution decolorization device to solve the technical problem that a potassium bisulfite solution is directly added into a reaction kettle without being dispersed, a long stirring time is required in the reaction kettle to fully mix the potassium bisulfite solution and the sodium hydrosulfide solution, and the decolorization efficiency of the sodium hydrosulfide solution needs to be improved.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A sodium hydrosulfide solution decolorizing device comprises a reactor, wherein a stirring shaft is rotatably connected in the reactor, two round tubes are fixedly penetrated on a reactor cover of the reactor, an annular box is arranged in the reactor, the top of the annular box is open, and the annular box is located below the round tube, the stirring shaft is located inside the annular box, a plurality of inner dispersion boxes are fixed on a side of the annular box close to the stirring shaft, the side surfaces of the inner dispersion boxes are fixedly connected to the circumferential surface of the stirring shaft, a plurality of outer dispersion boxes are fixed on a side of the annular box away from the stirring shaft, the inner dispersion boxes and the outer dispersion boxes are both connected to the annular box, a shunt assembly is arranged at the bottom of the inner dispersion box and the outer dispersion box, and a reducing agent is shunted again through the shunting assembly after being shunted by the inner dispersion box and the outer dispersion box.

[0008] Preferably, the central axis of the annular box coincides with the central axis of the stirring shaft.

[0009] Preferably, the number of the inner dispersion boxes is three, the number of the outer dispersion boxes is six, and the three inner dispersion boxes and the six outer dispersion boxes are distributed in a circular array with the center of the circular box as the array center.

[0010] Preferably, a circular ring is fixed to the bottom of the inner wall of the annular box, and the top of the circular ring is in an inverted V shape.

[0011] Preferably, the bottoms of the inner walls of the inner dispersion box and the outer dispersion box are both downwardly curved surfaces.

[0012] Preferably, a reinforcing rib is fixed on the inner dispersion box, one end of the reinforcing rib is fixedly connected to the circumferential surface of the stirring shaft, and the other end of the reinforcing rib is fixedly connected to a side of the annular box close to the stirring shaft.

[0013] Preferably, the flow distribution component comprises a flow distribution plate, and the bottoms of the inner dispersion box and the outer dispersion box are both fixed with connecting columns, and the flow distribution plate is fixed at the bottoms of the connecting columns.

[0014] Preferably, the top of the diverter plate is provided with an upwardly curved surface.

[0015] Compared with the prior art, the utility model has at least the following beneficial effects:

[0016] In the above scheme, by setting the annular box, the inner dispersion box and the outer dispersion box, the potassium bisulfite solution flows into the annular box after passing through the circular tube and flows to the positions of multiple inner dispersion boxes and multiple outer dispersion boxes, and is discharged from the bottom after preliminary dispersion by the inner dispersion box and the outer dispersion box. The discharged potassium bisulfite solution flows to the diverter plate of the diverter assembly, and is diverted again by the diverter plate. During the diversion process, the diverter plate rotates slowly following the stirring shaft, thereby increasing the dispersion area of ​​the potassium bisulfite solution, and the potassium bisulfite solution is dispersed and then mixed with the sodium hydrosulfide solution, thereby shortening the stirring time for mixing the two, increasing the reaction rate of the two, and thus improving the decolorization efficiency of the sodium hydrosulfide solution.

[0017] Through the setting of the circular ring, after the potassium bisulfite solution enters the annular box, it is diverted by the inverted V-shaped circular ring on the top, so that the potassium bisulfite solution flows to the inner dispersion box and the outer dispersion box respectively, thereby guiding the flow of the potassium bisulfite solution, making the flow of the potassium bisulfite solution smoother, and effectively preventing the potassium bisulfite solution from accumulating in the annular box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a front cross-sectional view of the annular box of the utility model;

[0021] Figure 3 It is a top cross-sectional view of the outer dispersion box of the utility model;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the annular box of the present utility model.

[0023] [Reference Signs]

[0024] 1. Reactor; 2. Circular tube; 3. Ring box; 4. Inner dispersion box; 5. Outer dispersion box; 6. Diversion assembly; 61. Connecting column; 62. Diversion plate; 63. Arc surface; 7. Circular ring; 8. Reinforcement rib; 9. Stirring shaft.

[0025] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0026] The following is a detailed description of a sodium hydrosulfide solution decolorization device provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0027] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0028] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0029] like Figure 1-Figure 4 As shown, an embodiment of the utility model provides a sodium hydrosulfite solution decolorization device, including a reactor 1, a stirring shaft 9 is rotatably connected in the reactor 1, a sodium hydrosulfite solution is added into the reactor 1 from a feed pipe, two round tubes 2 are fixedly penetrated on the reactor cover of the reactor 1, potassium bisulfite solution is added from the two round tubes 2 at the same time, so as to improve the efficiency of adding potassium bisulfite solution into the reactor 1, an annular box 3 is arranged in the reactor 1, the top of the annular box 3 is open, and the annular box 3 is located below the round tube 2, the stirring shaft 9 is located inside the annular box 3, a plurality of inner dispersion boxes 4 are fixed on the side of the annular box 3 close to the stirring shaft 9, the side of the inner dispersion box 4 is fixedly connected to the circumferential surface of the stirring shaft 9, a plurality of outer dispersion boxes 5 are fixed on the side of the annular box 3 away from the stirring shaft 9, the inner dispersion boxes 4 and the outer dispersion boxes 5 are both connected to the annular box 3, a diversion component 6 is arranged at the bottom of the inner dispersion box 4 and the outer dispersion box 5, and the reducing agent is diverted by the inner dispersion box 4 and the outer dispersion box 5 and then diverted again through the diversion component 6.

[0030] like Figure 2 As shown, in this embodiment, the central axis of the annular box 3 coincides with the central axis of the stirring shaft 9, ensuring that the annular box 3 can always be located below the circular tube 2 during the rotation process.

[0031] like Figure 4 As shown, in this embodiment, the number of inner dispersion boxes 4 is three, and the number of outer dispersion boxes 5 is six. The three inner dispersion boxes 4 and the six outer dispersion boxes 5 are distributed in a circular array with the center of the ring box 3 as the array center. The three inner dispersion boxes 4 disperse the potassium bisulfite solution inside the ring box 3, and the six outer dispersion boxes 5 disperse the potassium bisulfite solution outside the ring box 3.

[0032] like Figure 2 As shown, in this embodiment, a circular ring 7 is fixed at the bottom of the inner wall of the annular box 3, and the top of the circular ring 7 is in an inverted V shape. The potassium bisulfite solution entering the annular box 3 automatically flows to the inner dispersion box 4 and the outer dispersion box 5 after being guided by the circular ring 7 with an inverted V shape at the top, so that the flow of the potassium bisulfite solution is smoother and the accumulation of the potassium bisulfite solution in the annular box 3 is effectively prevented.

[0033] like Figure 2 As shown, in this embodiment, the bottoms of the inner walls of the inner dispersion box 4 and the outer dispersion box 5 are both downwardly curved surfaces, which are used to gather the potassium bisulfite solution inside the inner dispersion box 4 and the outer dispersion box 5 to prevent the potassium bisulfite solution from accumulating inside the inner dispersion box 4 and the outer dispersion box 5.

[0034] like Figure 2 and Figure 4 As shown, in this embodiment, a reinforcing rib 8 is fixed on the inner dispersion box 4, one end of the reinforcing rib 8 is fixedly connected to the circumferential surface of the stirring shaft 9, and the other end of the reinforcing rib 8 is fixedly connected to the side of the annular box 3 close to the stirring shaft 9. The reinforcing rib 8 is used to increase the connection strength between the annular box 3 and the stirring shaft 9, thereby improving the fixing stability of the annular box 3.

[0035] like Figure 2 As shown, in this embodiment, the diverter assembly 6 includes a diverter plate 62, and the bottom of the inner dispersion box 4 and the outer dispersion box 5 are fixed with a connecting column 61, and the diverter plate 62 is fixed at the bottom of the connecting column 61. The inner dispersion box 4 and the outer dispersion box 5 are respectively connected and fixed to the corresponding diverter plate 62 through the connecting column 61. The potassium bisulfite solution is discharged from the bottom after preliminary dispersion by the inner dispersion box 4 and the outer dispersion box 5, and the discharged potassium bisulfite solution flows to the diverter plate 62, and is dispersed again to both sides of the diverter plate 62 under the action of the diverter plate 62.

[0036] like Figure 4 As shown, in this embodiment, the top of the diverter plate 62 is provided with an upwardly curved arc surface 63 , and the arc surface 63 is used to prevent the potassium bisulfite solution from accumulating on the diverter plate 62 .

[0037] Working principle: After the potassium bisulfite solution is transported into the circular tube 2, it flows from the bottom of the circular tube 2 to the annular box 3. After the potassium bisulfite solution flows into the annular box 3, it flows to the positions of multiple inner dispersion boxes 4 and multiple outer dispersion boxes 5 after being guided by the circular ring 7. After being preliminarily dispersed by the inner dispersion boxes 4 and the outer dispersion boxes 5, it is discharged from the bottom thereof. The discharged potassium bisulfite solution flows to the diverter plate 62, and is dispersed again to both sides of the diverter plate 62 under the action of the upwardly curved arc surface 63 at the top of the diverter plate 62. During the diversion process, the inner dispersion box 4, the outer dispersion box 5 and the diverter plate 62 follow the stirring shaft 9. The stirring motor rotates slowly to increase the dispersion area of ​​the potassium bisulfite solution again. After the potassium bisulfite solution is added, the stirring motor drives the stirring blade to rotate through the stirring shaft 9 to achieve mixing of the potassium bisulfite solution and the sodium hydrosulfide solution. The potassium bisulfite solution is dispersed and then mixed with the sodium hydrosulfide solution, which shortens the stirring time of the mixture and increases the reaction rate of the two, thereby improving the decolorization efficiency of the sodium hydrosulfide solution. After the sodium hydrosulfite solution is decolorized, the discharge valve at the bottom of the reactor 1 is opened, and the decolorized sodium hydrosulfide solution is discharged from the discharge pipe at the bottom of the reactor 1.

[0038] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, the specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A sodium hydrosulfide solution decolorizing device, comprising a reaction kettle (1), wherein a stirring shaft (9) is rotatably connected to the reaction kettle (1), characterized in that: The reactor cover of the reactor (1) is fixed with two circular tubes (2) passing through. An annular box (3) is arranged inside the reactor (1). The top of the annular box (3) is open and the annular box (3) is located below the circular tube (2). The stirring shaft (9) is located inside the annular box (3). A plurality of inner dispersion boxes (4) are fixed on a side of the annular box (3) close to the stirring shaft (9). The side of the inner dispersion box (4) is fixedly connected to the circumferential surface of the stirring shaft (9). A plurality of outer dispersion boxes (5) are fixed on a side of the annular box (3) away from the stirring shaft (9). The inner dispersion boxes (4) and the outer dispersion boxes (5) are both connected to the annular box (3). A flow dividing assembly (6) is arranged at the bottom of the inner dispersion box (4) and the outer dispersion box (5). The reducing agent is divided by the inner dispersion box (4) and the outer dispersion box (5) and then divided again by the flow dividing assembly (6).

2. A sodium hydrosulfide solution decolorizing device according to claim 1, characterized in that, The central axis of the annular box (3) coincides with the central axis of the stirring shaft (9).

3. A sodium hydrosulfide solution decolorizing device according to claim 1, characterized in that, The number of the inner dispersion boxes (4) is three, and the number of the outer dispersion boxes (5) is six. The three inner dispersion boxes (4) and the six outer dispersion boxes (5) are all distributed in a circular array with the center of the circular box (3) as the center of the array.

4. A sodium hydrosulfide solution decolorizing device according to claim 1, characterized in that, A circular ring (7) is fixed to the bottom of the inner wall of the annular box (3), and the top of the circular ring (7) is in an inverted V shape.

5. A sodium hydrosulfide solution decolorizing device according to claim 1, characterized in that, The bottoms of the inner walls of the inner dispersion box (4) and the outer dispersion box (5) are both downwardly curved surfaces.

6. A sodium hydrosulfide solution decolorizing device according to claim 1, characterized in that, A reinforcing rib (8) is fixed on the inner dispersion box (4), one end of the reinforcing rib (8) is fixedly connected to the circumferential surface of the stirring shaft (9), and the other end of the reinforcing rib (8) is fixedly connected to a side of the annular box (3) close to the stirring shaft (9).

7. A sodium hydrosulfide solution decolorizing device according to claim 1, characterized in that, The flow distribution assembly (6) comprises a flow distribution plate (62), and the bottoms of the inner dispersion box (4) and the outer dispersion box (5) are both fixed with connecting columns (61), and the flow distribution plate (62) is fixed to the bottoms of the connecting columns (61).

8. A sodium hydrosulfide solution decolorizing device according to claim 7, characterized in that, The top of the diverter plate (62) is provided with an upwardly curved arc surface (63).

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