Atmospheric distillation device for reaction liquid

Abstract

The utility model discloses an atmospheric distillation device for reaction liquid, and belongs to the technical field of fine chemical engineering. A reaction liquid atmospheric distillation device comprises a distillation still, a feeding pipe and an exhaust pipe are communicated with the two sides of the upper end of the distillation still respectively, a discharging pipe is communicated with the lower end of the distillation still, and the reaction liquid atmospheric distillation device further comprises a hemispherical shell which is installed at the upper end of the interior of the distillation still and located between the feeding pipe and the exhaust pipe; through cooperative use of the hemispherical shell, the connecting rod, the arc-shaped plate, the water absorption strip and the like, when the transmission shaft drives the stirring blades to stir reaction liquid, the water absorption strip can be driven by the connecting rod and the arc-shaped plate to slide on the hemispherical shell, so that water drops condensed at the top of the distillation kettle can be adsorbed and captured; the amount of water drops falling into the reaction liquid is reduced, and the efficiency of distilling, concentrating and purifying the reaction liquid is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of distillation and purification, and specifically relates to a reaction liquid atmospheric distillation device. Background Art

[0002] 3,4-Dimethylpyrazole is an important intermediate in the synthesis of 3,4-dimethylpyrazole phosphate. It has the characteristics of high efficiency, non-toxicity, stability and specificity. Studies have shown that 3,4-dimethylpyrazole phosphate can significantly inhibit the conversion of soil NH4+-N to NO3--N, showing a significant nitrification inhibition effect, and is far superior to similar products. Since its successful development, it has been widely used in production and has a broad prospect in agriculture.

[0003] When preparing 3,4-dimethylpyrazole, a crude 3,4-dimethylpyrazole reaction liquid with low purity is first obtained. In order to improve the purity of the produced 3,4-dimethylpyrazole, after the crude 3,4-dimethylpyrazole reaction liquid is obtained, it is placed in a normal pressure distillation kettle for distillation and purification. Although the existing normal pressure distillation kettle can distill and purify the crude 3,4-dimethylpyrazole reaction liquid, during the distillation and purification process, part of the solution distilled from the reaction liquid will adhere to the top of the kettle and condense into water droplets. When the water droplets are large enough, they will fall into the reaction liquid, so that the excess water in the reaction liquid cannot be quickly separated. Therefore, the efficiency of distillation and purification needs to be further improved. In view of this, the utility model is specially proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a reaction liquid atmospheric distillation device which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a reaction liquid atmospheric distillation device, including a distillation kettle, wherein the upper ends of the distillation kettle are respectively connected with a feed pipe and an exhaust pipe, and the lower end of the distillation kettle is connected with a discharge pipe, and also includes: a hemispherical shell installed at the upper end of the distillation kettle and located between the feed pipe and the exhaust pipe; a motor fixedly connected to the middle position of the hemispherical shell located outside the distillation kettle; a transmission shaft, rotatably connected in the distillation kettle, and the upper end is fixedly connected to the output end of the motor; a plurality of groups of stirring blades are fixedly connected to the transmission shaft at equal intervals; an arc plate, circumferentially and equidistantly slidably connected to the surface of the hemispherical shell located inside the distillation kettle, and the arc plate and the transmission shaft are fixedly connected by a connecting rod; a water absorption strip, connected to the side of the arc plate close to the hemispherical shell, and slidingly attached to the surface of the hemispherical shell.

[0006] In order to facilitate squeezing out the moisture in the water absorbing strip, further, a plurality of arc-shaped grooves are equidistantly arranged in a circumference on one side surface of the hemispherical shell close to the arc plate, an arc-shaped water squeezing strip is embedded in the arc-shaped groove, and a driving mechanism for controlling the movement of the arc-shaped water squeezing strip is installed on the hemispherical shell.

[0007] Furthermore, the driving mechanism includes a fixed box and a push rod, the fixed box is fixedly connected to the hemispherical shell through a support rod and is located above the motor, the push rod is obliquely and slidably connected in the fixed box, the lower end of the push rod passes through the hemispherical shell and is fixedly connected to the arc-shaped water squeezing strip, a rotating block is threadedly connected to the fixed box, the lower end of the rotating block is fixedly connected to a hemispherical push block used in conjunction with the push rod, the push rod is fixedly connected to a side of the arc-shaped water squeezing strip close to an elastic rubber ring, and the elastic rubber ring abuts against a side of the hemispherical shell close to the motor.

[0008] In order to facilitate the protection of the motor, further, a protection cylinder is fixedly connected to the outer side of the hemispherical shell close to the motor, and the motor is located in the protection cylinder.

[0009] In order to facilitate the rapid disassembly and assembly of the hemispherical shell, the hemispherical shell is further detachably connected to the distillation kettle via threads, and a handle is fixedly connected to the hemispherical shell.

[0010] In order to facilitate observation of the distillation progress of the reaction liquid, an observation window is further fixedly connected to the distillation kettle.

[0011] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model uses a hemispherical shell, a connecting rod, an arc plate, a water absorption strip and other components in coordination. When the transmission shaft drives the stirring blades to stir the reaction liquid, the connecting rod and the arc plate can also drive the water absorption strip to slide on the hemispherical shell, thereby absorbing and capturing the water droplets condensed on the top of the distillation kettle, reducing the amount of water droplets falling into the reaction liquid, and effectively improving the efficiency of distilling, concentrating and purifying the reaction liquid.

[0012] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the attached picture:

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 The partial cross-sectional structure of the utility model is shown in FIG. Figure 1 ;

[0016] Figure 3The partial cross-sectional structure of the utility model is shown in FIG. Figure 2 ;

[0017] Figure 4 For the utility model Figure 3 Schematic diagram of the structure of part A.

[0018] In the figure: 1, distillation kettle; 101, feed pipe; 102, exhaust pipe; 103, discharge pipe; 104, observation window; 2, hemispherical shell; 201, motor; 202, transmission shaft; 203, stirring blade; 204, connecting rod; 205, arc plate; 206, water absorption bar; 207, arc-shaped water squeezing bar; 208, fixed box; 209, rotating block; 2010, hemispherical top block; 2011, top rod; 2012, elastic rubber ring; 2013, protective cylinder. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0020] Embodiment 1:

[0021] Reference Figure 1-Figure 4 , a reaction liquid atmospheric distillation device, comprising a still 1, wherein both sides of the upper end of the still 1 are connected to a feed pipe 101 and an exhaust pipe 102 respectively, and the lower end of the still 1 is connected to a discharge pipe 103, and further comprising: a hemispherical shell 2, which is installed at the upper end of the still 1 and is located between the feed pipe 101 and the exhaust pipe 102; a motor 201, which is fixedly connected to the middle position of the hemispherical shell 2 located outside the still 1; a transmission shaft 202, which is rotatably connected in the still 1, and the upper end of which is fixedly connected to the output end of the motor 201; a plurality of groups of stirring blades 203, which are fixedly connected to the transmission shaft 202 at equal intervals; an arc plate 205, which is circumferentially and equidistantly slidably connected to the surface of the hemispherical shell 2 located inside the still 1, and the arc plate 205 is fixedly connected to the transmission shaft 202 through a connecting rod 204; a water absorption strip 206, which is connected to the side of the arc plate 205 close to the hemispherical shell 2, and slides against the surface of the hemispherical shell 2.

[0022] In the process of preparing 3,4-dimethylpyrazole reaction liquid, when it is necessary to distill, concentrate and purify the crude 3,4-dimethylpyrazole reaction liquid, the staff first transports the crude 3,4-dimethylpyrazole reaction liquid into the distillation kettle 1 through the feed pipe 101, and then turns on the heating element in the distillation kettle 1 to heat and distill the crude 3,4-dimethylpyrazole reaction liquid. At the same time, the motor 201 is started, and the motor 201 drives the stirring blade 203 to rotate through the transmission shaft 202, so that the crude 3,4-dimethylpyrazole reaction liquid can be stirred, so that the crude 3,4-dimethylpyrazole reaction liquid can be heated more evenly, thereby improving the distillation efficiency. When the crude 3,4-dimethylpyrazole reaction liquid reaches the boiling point, steam will float upward in the crude 3,4-dimethylpyrazole reaction liquid. When it contacts the semi-solidified steam, the steam will flow upward. After the steam reaches the surface of the hemispherical shell 2, it will diffuse outward and be discharged through the exhaust pipe 102. As the steam continues to drift to the surface of the hemispherical shell 2, the steam will generate water droplets that remain on the surface of the hemispherical shell 2. In order to prevent the generated water droplets from falling into the crude 3,4-dimethylpyrazole reaction liquid, the device is equipped with a connecting rod 204, an arc plate 205 and a water absorption strip 206 on the transmission shaft 202, and the water absorption strip 206 is slidably attached to the hemispherical shell 2, so that when the transmission shaft 202 rotates, the connecting rod 204 can be driven to rotate, and the connecting rod 204 will drive the water absorption strip 206 to rotate in a circle on the surface of the hemispherical shell 2 through the arc plate 205, and then the water absorption strip 206 can absorb the water droplets condensed on the hemispherical shell 2 to prevent the water droplets from falling into the crude 3,4-dimethylpyrazole reaction liquid and affecting the distillation efficiency of the reaction liquid.

[0023] Embodiment 2:

[0024] Reference Figure 1-Figure 4 , a reaction liquid atmospheric distillation device, which is basically the same as Example 1, and further: a plurality of arc-shaped grooves are equidistantly arranged on a side surface of the hemispherical shell 2 close to the arc-shaped plate 205, and an arc-shaped water squeezing bar 207 is embedded in the arc-shaped groove, and a driving mechanism for controlling the movement of the arc-shaped water squeezing bar 207 is installed on the hemispherical shell 2.

[0025] The driving mechanism includes a fixed box 208 and a push rod 2011. The fixed box 208 is fixedly connected to the hemispherical shell 2 through a support rod and is located above the motor 201. The push rod 2011 is connected in an inclined and sliding manner in the fixed box 208. The lower end of the push rod 2011 passes through the hemispherical shell 2 and is fixedly connected to the arc-shaped water squeezing strip 207. A rotating block 209 is threadedly connected to the fixed box 208. The lower end of the rotating block 209 is fixedly connected to a hemispherical push block 2010 used in conjunction with the push rod 2011. The side of the push rod 2011 close to the arc-shaped water squeezing strip 207 is fixedly connected to an elastic rubber ring 2012, and the elastic rubber ring 2012 is against the side of the hemispherical shell 2 close to the motor 201.

[0026] When the distillation of the reaction liquid is completed and the distilled, concentrated and purified reaction liquid is discharged through the discharge pipe 103, the rod rotating block 209 can be rotated at this time, and the rotating block 209 will apply downward pressure to the top rod 2011 through the hemispherical top block 2010, and then the top rod 2011 will overcome the elastic force of the elastic rubber ring 2012 to drive the arc-shaped water squeezing strip 207 to move out of the arc-shaped groove, so that when the water absorption strip 206 rotates on the hemispherical shell 2, it will intermittently contact the arc-shaped water squeezing strip 207. When the water absorption strip 206 and the arc-shaped water squeezing strip 207 are against each other, the arc-shaped water squeezing strip 207 will The water absorbing strip 206 will be squeezed with the cooperation of the arc plate 205, so that the water in the water absorbing strip 206 can be squeezed out, and then the squeezed water will be discharged from the distillation kettle 1 through the discharge pipe 103. When the water absorbing strip 206 is squeezed, the rotating block 209 is rotated in the opposite direction, and the rotating block 209 will drive the hemispherical top block 2010 to move upward, and then the top rod 2011 will drive the arc-shaped water squeezing strip 207 to move back under the action of the elastic rubber ring 2012, and then the arc-shaped water squeezing strip 207 can return to the arc-shaped groove, which effectively ensures the reusable effect of the water absorbing strip 206.

[0027] Embodiment 3:

[0028] Reference Figure 1-Figure 4 , a reaction liquid atmospheric distillation device, which is basically the same as Example 2, and further: a protective cylinder 2013 is fixedly connected to the outer side of the hemispherical shell 2 near the motor 201, and the motor 201 is located in the protective cylinder 2013. Through the setting of the protective cylinder 2013, when the reaction liquid is distilled, the staff can fill the hemispherical shell 2 with cooling water, so that when the steam contacts the hemispherical shell 2, it can form water droplets when it is cooled, so that the water absorption strip 206 can quickly absorb the moisture generated by the steam, and at the same time, water will not enter the motor 201.

[0029] The hemispherical shell 2 is detachably connected to the distillation kettle 1 through a thread, and a handle is fixedly connected to the hemispherical shell 2. By threading the hemispherical shell 2 and the distillation kettle 1, it is convenient to remove the hemispherical shell 2 from the distillation kettle 1, thereby facilitating the disassembly, assembly, maintenance and replacement of components installed on the hemispherical shell 2, providing convenience for staff to repair the device.

[0030] An observation window 104 is fixedly connected to the distillation kettle 1, which is convenient for the staff to observe the distillation progress of the reaction liquid when the reaction liquid is distilled, concentrated and purified, thereby facilitating the staff to grasp the distillation time and improve the distillation efficiency.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. A reaction liquid atmospheric distillation device, comprising a still (1), wherein both sides of the upper end of the still (1) are connected to a feed pipe (101) and an exhaust pipe (102), respectively, and the lower end of the still (1) is connected to a discharge pipe (103), characterized in that: Also includes: A hemispherical shell (2) is installed at the upper end of the still (1) and is located between the feed pipe (101) and the exhaust pipe (102); A motor (201) is fixedly connected to the hemispherical housing (2) at a middle position outside the distillation kettle (1); A transmission shaft (202) is rotatably connected in the distillation kettle (1), and an upper end of the transmission shaft is fixedly connected to an output end of the motor (201); A plurality of groups of stirring blades (203) are fixedly connected to the transmission shaft (202) at equal intervals; The arc-shaped plate (205) is circumferentially and equidistantly slidably connected to the surface of the hemispherical shell (2) located inside the distillation kettle (1), and the arc-shaped plate (205) is fixedly connected to the transmission shaft (202) via a connecting rod (204); The water absorbing strip (206) is connected to a side of the arc-shaped plate (205) close to the hemispherical shell (2) and is slidably attached to the surface of the hemispherical shell (2).

2. A reaction liquid atmospheric distillation apparatus according to claim 1, characterized in that: A plurality of arc-shaped grooves are equidistantly arranged on a side surface of the hemispherical shell (2) close to the arc-shaped plate (205) in a circumferential manner, and an arc-shaped water squeezing strip (207) is embedded in the arc-shaped groove. A driving mechanism for controlling the movement of the arc-shaped water squeezing strip (207) is installed on the hemispherical shell (2).

3. A reaction liquid atmospheric distillation apparatus according to claim 2, characterized in that: The driving mechanism comprises a fixed box (208) and a push rod (2011); the fixed box (208) is fixedly connected to the hemispherical shell (2) via a support rod and is located above the motor (201); the push rod (2011) is connected in an inclined and sliding manner in the fixed box (208); the lower end of the push rod (2011) passes through the hemispherical shell (2) and is fixedly connected to the arc-shaped water squeezing strip (207); a rotating block (209) is threadedly connected to the fixed box (208); the lower end of the rotating block (209) is fixedly connected to a hemispherical push block (2010) used in conjunction with the push rod (2011); a side of the push rod (2011) close to the arc-shaped water squeezing strip (207) is fixedly connected to an elastic rubber ring (2012); the elastic rubber ring (2012 abuts against a side of the hemispherical shell (2) close to the motor (201).

4. A reaction liquid atmospheric distillation apparatus according to claim 1, characterized in that: A protective tube (2013) is fixedly connected to the outer side of the hemispherical shell (2) close to the motor (201), and the motor (201) is located inside the protective tube (2013).

5. The atmospheric distillation apparatus for reaction liquid according to claim 1, characterized in that: The hemispherical shell (2) is detachably connected to the distillation kettle (1) via threads, and a handle is fixedly connected to the hemispherical shell (2).

6. The atmospheric distillation apparatus for reaction liquid according to claim 1, characterized in that: An observation window (104) is fixedly connected to the distillation kettle (1).

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