Hydrofluoric acid rectifying tower

Abstract

The utility model relates to a hydrofluoric acid rectifying tower, which belongs to the field of hydrofluoric acid production and comprises a rectifying tower body, a cover plate detachably mounted on the upper surface of the rectifying tower body and a base arranged on the lower surface of the rectifying tower body. And a cleaning mechanism extending into the rectifying tower main body is arranged on the upper surface of the base. According to the hydrofluoric acid rectifying tower, the driving motor is started to operate through the controller to drive the intermittent gear to rotate, and when the intermittent gear is meshed with the driven gear, the driven gear drives the hollow shaft and the centrifugal cylinder to rotate; when the intermittent gear is disengaged from the driven gear, the centrifugal cylinder stops rotating, and intermittent rotation of the centrifugal cylinder enables a hydrofluoric acid film to be in continuous contact with steam in the tower to promote volatilization of impurity components from hydrofluoric acid to enter a gas phase, so that the separation efficiency of rectification is improved, and the phenomena of local overheating and non-heating are reduced; and the advantage of good rectification effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydrofluoric acid production technology, specifically to a hydrofluoric acid rectifying tower. BACKGROUND

[0002] Hydrofluoric acid is an important chemical raw material, and its rectification process has a key influence on the purity and quality of the product. The rectifying tower is a tower type vapor-liquid contact device for rectification, which utilizes the different volatility of each component in the mixture, i.e., the different vapor pressures of each component at the same temperature, to transfer the light components in the liquid phase to the gas phase and the heavy components in the gas phase to the liquid phase, thereby achieving the purpose of separation.

[0003] A hydrofluoric acid rectifying tower is needed in the production process of hydrofluoric acid. A rectifying tower for anhydrous hydrofluoric acid production is disclosed in Chinese Utility Model Patent No. CN208852450U, which includes a rectifying tower and a support frame. The rectifying tower is installed on the support frame, which includes a frame body, a bottom plate, a fixing block, and a supporting block. The rectifying tower includes a tower body, a tower bottom tank, and a maintenance ladder. The maintenance ladder is installed on the sidewall of the tower body, and the tower bottom tank is placed on the bottom plate. The fixing block securely holds the tower bottom tank. This utility model installs the rectifying tower on the support frame, ensuring that the outer surface of the rectifying tower is clean and tidy, preventing the rectifying tower from tipping over, and having strong stability and reliability. It is convenient to maintain and can quickly identify the fault.

[0004] However, the rectifying and purification process of the rectifying tower for anhydrous hydrofluoric acid production needs to strictly control the heating and condensation conditions to ensure product quality and safe production. In the rectification process of this rectifying tower, the raw materials are not uniformly heated, resulting in poor rectification effect. Moreover, the interior of the rectifying tower is not easy to flush, and impurities are easily left, affecting subsequent production. Therefore, a hydrofluoric acid rectifying tower is proposed to solve the above-mentioned problems. SUMMARY

[0005] In view of the deficiencies of the prior art, the utility model provides a hydrofluoric acid rectifying tower, which has the advantages of good rectification effect and easy maintenance, and solves the problem that the rectifying and purification process of the existing rectifying tower for anhydrous hydrofluoric acid production needs to strictly control the heating and condensation conditions to ensure product quality and safe production. In the rectification process of this rectifying tower, the raw materials are not uniformly heated, resulting in poor rectification effect. Moreover, the interior of the rectifying tower is not easy to flush, and impurities are easily left, affecting subsequent production. Therefore, a hydrofluoric acid rectifying tower is proposed to solve the above-mentioned problems.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a kind of hydrofluoric acid rectifying tower, including rectifying tower main body, detachably installed on the upper surface of rectifying tower main body cover plate and be set to the base of the lower surface of rectifying tower main body, the upper surface of the cover plate is provided with the centrifugal mechanism extending to the inside of rectifying tower main body, the upper surface of the base is provided with the cleaning mechanism extending to the inside of rectifying tower main body;

[0007] The centrifugal mechanism includes a drive motor fixedly installed on the upper surface of the cover plate, a hollow shaft rotatably connected to the inside of the cover plate, an intermittent gear fixedly connected to the output shaft of the drive motor, a driven gear fixedly connected to the outside of the hollow shaft, and a centrifugal cylinder fixedly connected to the outside of the hollow shaft.

[0008] The cleaning mechanism includes a liquid storage tank fixedly connected to the top of the base, a booster pump fixedly installed on the top of the liquid storage tank, a shaft sleeve rotatably installed on the top end of the hollow shaft, a spray hole opened in the inside of the hollow shaft, and a hose fixedly connected between the shaft sleeve and the booster pump.

[0009] Further, the drive motor is fixedly installed on the upper surface of the cover plate by bolts, a bearing adapted to the hollow shaft is fixedly installed in the inside of the cover plate, and the intermittent gear and the driven gear are in meshing engagement.

[0010] Further, the outer diameter of the centrifugal cylinder is adapted to the inner diameter of the rectifying tower main body, the centrifugal cylinder is rotatably connected to the inside of the rectifying tower main body, and a plurality of leakage holes are opened in the inside of the centrifugal cylinder.

[0011] Further, the back of the liquid storage tank is fixedly connected with a water inlet pipe and a water outlet pipe, respectively, and a water suction pipe is fixedly connected between the booster pump and the liquid storage tank.

[0012] Further, one end of the hose away from the booster pump is rotatably connected to the upper surface of the cover plate through the shaft sleeve, the number of the spray holes is a plurality, and the plurality of spray holes are distributed at equal intervals in the inside of the hollow shaft.

[0013] Further, three support legs are fixedly connected between the rectifying tower main body and the base, and the three support legs are distributed in a ring shape outside the rectifying tower main body.

[0014] Further, a feed pipe is fixedly connected to the left side of the rectifying tower main body, a reflux pipe and an air inlet pipe are fixedly connected to the right side of the rectifying tower main body, respectively, and an air outlet pipe is fixedly connected to the upper surface of the cover plate.

[0015] Compared with the prior art, the utility model provides a kind of hydrofluoric acid rectifying tower, with the following beneficial effects:

[0016] 1. The hydrofluoric acid rectification tower, through the controller starts the driving motor to run, drives the intermittent gear to rotate, when the intermittent gear is engaged with the driven gear, the driven gear drives the hollow shaft and the centrifugal cylinder to rotate, when the intermittent gear is disengaged from the driven gear, the centrifugal cylinder stops rotating, the intermittent rotation of the centrifugal cylinder makes the hydrofluoric acid film continuously contact with the steam in the tower, promotes the impurity components to volatilize from the hydrofluoric acid into the gas phase, thereby improving the separation efficiency of rectification, reducing the local overheating and unheating phenomenon, and achieving the advantages of good rectification effect.

[0017] 2. The hydrofluoric acid rectification tower, through the controller starts the booster pump to work, can ensure that the cleaning liquid passes through the hose and the shaft sleeve with sufficient pressure, is finally sprayed from the spray hole, through the synchronous rotation of the centrifugal cylinder and the hollow shaft, the cleaning liquid can reach every corner of the centrifugal cylinder, and the centrifugal force generated by rotation can more effectively utilize the cleaning liquid, which helps to ensure that the inside of the rectification tower body is fully and thoroughly cleaned, prevents impurities from being left, ensures the cleanliness and production efficiency of the rectification tower, and achieves the advantages of easy maintenance and strong practicality. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the structure perspective drawing of the utility model;

[0019] Fig. 2 It is the structure perspective drawing of the centrifugal mechanism of the utility model;

[0020] Fig. 3 It is the structure sectional perspective drawing of the centrifugal mechanism of the utility model;

[0021] Fig. 4 It is the structure sectional perspective drawing of the centrifugal mechanism of the utility model; Fig. 3 It is the enlarged structure schematic view of A shown in the utility model.

[0022] In the drawing: 1, rectification tower body; 2, cover plate; 3, base; 4, centrifugal mechanism; 41, driving motor; 42, intermittent gear; 43, hollow shaft; 44, driven gear; 45, centrifugal cylinder; 5, cleaning mechanism; 51, liquid storage tank; 52, booster pump; 53, shaft sleeve; 54, hose; 55, spray hole; 6, feed pipe; 7, reflux pipe; 8, air inlet pipe; 9, air outlet pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer toFigs. 1 to 4 The hydrogen fluoride rectification tower in the embodiment comprises a rectification tower body 1, a cover plate 2 detachably installed on the upper surface of the rectification tower body 1, and a base 3 arranged on the lower surface of the rectification tower body 1, the upper surface of the cover plate 2 is provided with a centrifugal mechanism 4 extending into the interior of the rectification tower body 1, and the upper surface of the base 3 is provided with a cleaning mechanism 5 extending into the interior of the rectification tower body 1; the centrifugal mechanism 4 comprises a driving motor 41 fixedly installed on the upper surface of the cover plate 2, a hollow shaft 43 rotationally connected to the interior of the cover plate 2, an intermittent gear 42 fixedly connected to the output shaft of the driving motor 41, a driven gear 44 fixedly connected to the exterior of the hollow shaft 43, and a centrifugal cylinder 45 fixedly connected to the exterior of the hollow shaft 43. The inner wall of the rectification tower body 1 is provided with a heating device, the heating device comprises an electric heater and a hot oil circulation system, the electric heater is arranged on the inner wall of the tower body, the hot oil circulation system comprises a hot oil pump, a hot oil pipeline and a heat exchanger, the hot oil pump is connected with the heat exchanger through the hot oil pipeline, and the heat exchanger is arranged on the outer wall of the tower body and used for transferring the heat generated by the electric heater to the raw material in the tower body, so that the raw material is uniformly heated. The top of the rectification tower body 1 is provided with a condenser for condensing the vaporized hydrogen fluoride into liquid. The condenser is made of corrosion-resistant material to ensure long-term stable operation. The condenser is internally provided with a cooling medium channel to achieve the condensing effect through circulating cooling medium. The bottom of the rectification tower body 1 is provided with a reboiler, the inlet of the reboiler is connected with the bottom of the tower body, and the outlet is connected with the lower part of the tower body, which is used for heating the liquid at the bottom of the tower to generate rising steam.

[0025] The driving motor 41 is fixedly installed on the upper surface of the cover plate 2 by means of bolts, bearings matched with the hollow shaft 43 are fixedly installed in the interior of the cover plate 2, and the intermittent gear 42 and the driven gear 44 are mutually meshed.

[0026] Specifically, the outer diameter of the centrifugal cylinder 45 is matched with the inner diameter of the rectification tower body 1, the centrifugal cylinder 45 is rotationally connected to the interior of the rectification tower body 1, and a plurality of leakage holes are arranged in the interior of the centrifugal cylinder 45. The driving motor 41 is started to rotate by the controller, the intermittent gear 42 is driven to rotate, the driven gear 44 drives the hollow shaft 43 and the centrifugal cylinder 45 to rotate when the intermittent gear 42 and the driven gear 44 are meshed, and the centrifugal cylinder 45 stops rotating when the intermittent gear 42 and the driven gear 44 are disengaged. The intermittent rotation of the centrifugal cylinder 45 causes the hydrogen fluoride film to be in constant contact with the steam in the tower, which promotes the impurity components to volatilize from the hydrogen fluoride into the gas phase, thereby improving the separation efficiency of the rectification, reducing the local overheating and unheating phenomenon, and achieving the advantage of good rectification effect.

[0027] In the embodiment, the cleaning mechanism 5 comprises a liquid storage tank 51 fixedly connected to the top of the base 3, a booster pump 52 fixedly installed on the top of the liquid storage tank 51, a shaft sleeve 53 rotatably installed on the top end of the hollow shaft 43, a plurality of spray holes 55 formed in the hollow shaft 43, and a hose 54 fixedly connected between the shaft sleeve 53 and the booster pump 52. The booster pump 52 is started by the controller to work, so that the cleaning liquid can be sprayed out of the spray holes 55 through the hose 54 and the shaft sleeve 53 with sufficient pressure. The synchronous rotation of the centrifugal cylinder 45 and the hollow shaft 43 enables the cleaning liquid to reach every corner of the centrifugal cylinder 45, and the centrifugal force generated by the rotation can make the cleaning liquid more effective, so as to ensure that the inside of the rectifying tower body 1 is fully and thoroughly cleaned.

[0028] The back of the liquid storage tank 51 is fixedly connected with a water inlet pipe and a water outlet pipe, and the booster pump 52 is fixedly connected with a water suction pipe.

[0029] Specifically, one end of the hose 54 away from the booster pump 52 is rotatably connected to the upper surface of the cover plate 2 through the shaft sleeve 53, and the plurality of spray holes 55 are equidistantly distributed in the hollow shaft 43.

[0030] In the embodiment, three supporting legs are fixedly connected between the rectifying tower body 1 and the base 3, and the three supporting legs are annularly distributed outside the rectifying tower body 1. The left side of the rectifying tower body 1 is fixedly connected with a feed pipe 6, the right side of the rectifying tower body 1 is fixedly connected with a reflux pipe 7 and an air inlet pipe 8 respectively, and the upper surface of the cover plate 2 is fixedly connected with an air outlet pipe 9.

[0031] The working principle of the above embodiment is as follows:

[0032] In use, the raw material mixed with hydrofluoric acid is added from the feed pipe 6, the driving motor 41 is started to work by the controller, and the intermittent gear 42 is driven to rotate, and when the intermittent gear 42 is engaged with the driven gear 44, the driven gear 44 drives the hollow shaft 43 and the centrifugal cylinder 45 to rotate; when the intermittent gear 42 is disengaged from the driven gear 44, the centrifugal cylinder 45 stops rotating, and the intermittent rotation of the centrifugal cylinder 45 enables the hydrogen fluoride film to be in constant contact with the steam in the tower, so as to promote the impurity components to volatilize from the hydrogen fluoride into the gas phase, thereby improving the separation efficiency of the rectification; the booster pump 52 is started to work by the controller, so that the cleaning liquid can be sprayed out of the spray holes 55 through the hose 54 and the shaft sleeve 53 with sufficient pressure. The synchronous rotation of the centrifugal cylinder 45 and the hollow shaft 43 enables the cleaning liquid to reach every corner of the centrifugal cylinder 45, and the centrifugal force generated by the rotation ensures that the inside of the rectifying tower body 1 is fully and thoroughly cleaned. After flushing, the heating device and the driving motor 41 are restarted to work, and the rectification process continues.

[0033] The mounting mode, the connecting mode or the setting mode disclosed in the embodiment are all common mechanical connecting modes, and can be implemented as long as the beneficial effects can be achieved, in addition, the electrical components appearing in the embodiment are all electrically connected with the master controller and the power supply, the master controller can be a conventional known device such as a computer which plays a control role, the control of the electrical components can be realized by simple programming by the person skilled in the art, and the existing disclosed power connection technology also belongs to the common knowledge in the art, so the specific structural composition and working principle of the embodiment will not be described too much.

[0034] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0035] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydrofluoric acid rectification column characterized by: The application relates to a rectifying tower, which comprises a rectifying tower body (1), a cover plate (2) detachably installed on the upper surface of the rectifying tower body (1), and a base (3) arranged on the lower surface of the rectifying tower body (1), wherein the upper surface of the cover plate (2) is provided with a centrifugal mechanism (4) extending into the rectifying tower body (1), and the upper surface of the base (3) is provided with a cleaning mechanism (5) extending into the rectifying tower body (1). The centrifugal mechanism (4) comprises a driving motor (41) fixedly installed on the upper surface of the cover plate (2), a hollow shaft (43) rotationally connected to the inside of the cover plate (2), an intermittent gear (42) fixedly connected to the output shaft of the driving motor (41), a driven gear (44) fixedly connected to the outside of the hollow shaft (43), and a centrifugal cylinder (45) fixedly connected to the outside of the hollow shaft (43). The cleaning mechanism (5) comprises a liquid storage tank (51) fixedly connected to the top of the base (3), a booster pump (52) fixedly installed on the top of the liquid storage tank (51), a shaft sleeve (53) rotationally installed on the top end of the hollow shaft (43), a spray hole (55) opened in the inside of the hollow shaft (43), and a hose (54) fixedly communicated between the shaft sleeve (53) and the booster pump (52).

2. A hydrofluoric acid rectification column according to claim 1, characterized in that: The driving motor (41) is fixedly installed on the upper surface of the cover plate (2) through bolts, bearings matched with the hollow shaft (43) are fixedly installed in the inside of the cover plate (2), and the intermittent gear (42) and the driven gear (44) are in meshing engagement.

3. A hydrofluoric acid rectification column according to claim 1, characterized in that: The outer diameter of the centrifugal cylinder (45) is matched with the inner diameter of the rectifying tower body (1), the centrifugal cylinder (45) is rotationally connected to the inside of the rectifying tower body (1), and a plurality of leakage holes are formed in the inside of the centrifugal cylinder (45).

4. A hydrofluoric acid rectification column according to claim 1, characterized in that: The back of the liquid storage tank (51) is fixedly communicated with a water inlet pipe and a water outlet pipe, and a water suction pipe is fixedly communicated between the booster pump (52) and the liquid storage tank (51).

5. A hydrofluoric acid rectification column according to claim 1, characterized in that: One end of the hose (54) away from the booster pump (52) is rotationally connected to the upper surface of the cover plate (2) through the shaft sleeve (53), the number of the spray holes (55) is a plurality, and the plurality of spray holes (55) are equidistantly distributed in the inside of the hollow shaft (43) in sequence.

6. A hydrofluoric acid rectification column according to claim 1, characterized in that: Three supporting legs are fixedly connected between the rectifying tower body (1) and the base (3), and the three supporting legs are annularly distributed on the outside of the rectifying tower body (1).

7. A hydrofluoric acid rectification column according to claim 1, characterized in that: A feed pipe (6) is fixedly communicated with the left side of the rectifying tower body (1), a reflux pipe (7) and an air inlet pipe (8) are fixedly communicated with the right side of the rectifying tower body (1) respectively, and an air outlet pipe (9) is fixedly communicated with the upper surface of the cover plate (2).

Images