Distributor applied to esterification reaction kettle

Abstract

The utility model discloses a distributor applied to an esterification reaction kettle. The distributor comprises a reaction kettle, an extracting agent inlet and a phthalic anhydride inlet are formed in the reaction kettle; a distributor and a liquid guide disc are arranged in the reaction kettle, the liquid guide disc is positioned at the upper part of the distributor, and pipe bodies of the extracting agent inlet and the phthalic anhydride inlet are positioned at the upper part of the liquid guide disc; the liquid guide disc is circular, a hemisphere part is arranged in the middle of the liquid guide disc, and an overflow plate bent upwards is arranged on the edge of the hemisphere part; the upper edge of the distributor extends out of the baffle to form a liquid containing part, the lower part of the distributor is provided with a plurality of diversion holes to form a downward flowing part, and a plurality of ventilation parts are arranged on the circumference of the outer side wall of the distributor. According to the reaction kettle, the distributor and the liquid guide disc are arranged in the reaction kettle, an extracting agent and phthalic anhydride are mixed by the liquid guide disc and then flow into the distributor, and reaction liquid is further mixed by the flow dividing holes in the distributor and uniformly flows into the bottom of the reaction kettle to react with isobutanol, so that rapid reaction can be realized without stirring; the energy consumption is reduced; the reaction rate of the reaction kettle is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and specifically relates to a distributor applied to an esterification reactor. Background Art

[0002] The existing preparation of diisobutyl phthalate is an intermittent tank-type stirring reaction. During the reaction process, the reaction efficiency is accelerated by stirring. While the continuous reaction is to improve the reaction efficiency through an extractant, a plate separation column, and a distributor, and the original stirring device is cancelled. The excellent reaction efficiency of the continuous reactor depends on a good distributor. In order to improve the reaction efficiency of the continuous reactor, a distributor applied to an esterification reactor is provided. Summary of the Utility Model

[0003] In view of this, the technical problem to be solved by the utility model is to provide a distributor applied to an esterification reactor, which solves the problem of low reaction efficiency of the reactor in the prior art.

[0004] To solve the above technical problem, the utility model discloses a distributor applied to an esterification reactor, including: a reactor; an extractant inlet and a phthalic anhydride inlet are provided on the reactor; a distributor and a liquid guide plate are provided inside the reactor, the liquid guide plate is located above the distributor, and the pipe bodies of the extractant inlet and the phthalic anhydride inlet are located above the liquid guide plate; the liquid guide plate is circular, with a hemispherical part in the middle, and an overflow plate bent upward is provided at the edge of the hemispherical part; a baffle is extended from the upper edge of the distributor to form a liquid holding part, a plurality of shunt holes are provided at the lower part to form a downstream part, and a plurality of air permeable parts are provided on the circumferential outer side wall of the distributor.

[0005] Further, the upper end of the shunt hole is a liquid inlet, the middle part is a mixing chamber, a plurality of overflow plates are arranged from top to bottom in the mixing chamber, the lower end is a liquid outlet, and a shunt cover is provided at the liquid outlet, and a plurality of through holes are provided on the shunt cover.

[0006] Further, the liquid inlet is in an inverted cone shape.

[0007] Further, the mixing chamber is in an inverted cone shape, and the overflow plates therein are arranged in a spiral shape from top to bottom.

[0008] Further, the diameters of the liquid outlet and the liquid inlet are larger than the diameters of both ends of the mixing chamber.

[0009] Further, the cross section of the air permeable part is in an arc shape, and there are six air permeable parts on the circumferential outer side wall of the device.

[0010] Compared with the prior art, the present application can obtain the following technical effects:

[0011] The utility model arranges a distributor and a liquid guide tray inside the reaction kettle. The liquid guide tray mixes the extractant and phthalic anhydride, and then flows into the distributor. The shunt holes in the distributor further mix the reaction liquid and evenly flow it into the bottom of the reaction kettle to react with isobutanol, so that rapid reaction can be carried out without stirring, energy consumption can be reduced, and the reaction rate of the reaction kettle can be improved.

[0012] Of course, it is not necessarily required that any product implementing this application simultaneously achieves all the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of this application and form a part of this application. The schematic embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0014] Figure 1 is a schematic diagram of the distributor according to an embodiment of the utility model;

[0015] Figure 2 is a sectional view along the cutting line A-A.

[0016] REFERENCE SIGNS

[0017] Distributor 1, liquid guide tray 2, pipe body 3, hemispherical part 4, overflow plate 5, baffle 6, liquid holding part 7, shunt hole 8, downstream part 9, air permeable part 10, liquid inlet 11, mixing chamber 12, liquid outlet 13, shunt cover 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will detail the embodiments of this application in conjunction with the drawings and embodiments, so as to fully understand how this application uses technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly.

[0019] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the distributor according to an embodiment of the utility model; Figure 2 is a sectional view along the cutting line A-A.

[0020] A distributor applied to an esterification reaction kettle includes: a reaction kettle; an extractant inlet and a phthalic anhydride inlet are provided on the reaction kettle; a distributor 1 and a liquid guide tray 2 are arranged inside the reaction kettle, the liquid guide tray 2 is located above the distributor 1, and the pipe body 3 of the extractant inlet and the phthalic anhydride inlet is located above the liquid guide tray 2; the liquid guide tray 2 is circular, with a hemispherical part 4 in the middle, and an upwardly bent overflow plate 5 is arranged at the edge of the hemispherical part 4; the upper edge of the distributor 1 extends out a baffle 6 to form a liquid holding part 7, and a plurality of shunt holes 8 are arranged at the lower part to form a downstream part 9, and a plurality of air permeable parts 10 are arranged on the circumferential outer wall of the distributor 1.

[0021] The upper end of the diversion hole 8 is the liquid inlet 11, the middle part is the mixing chamber 12, the mixing chamber 12 is provided with a plurality of overflow plates 5 from top to bottom, the lower end is the liquid outlet 13, the liquid outlet 13 is provided with a diversion cover 14, and the diversion cover 14 has a plurality of through holes; the liquid inlet 11 is in an inverted cone shape; the mixing chamber 12 is in an inverted cone shape, and the overflow plates 5 therein are arranged in a spiral shape from top to bottom; the diameters of the liquid outlet 13 and the liquid inlet 11 are larger than the diameters of both ends of the mixing chamber 12; the cross section of the air permeable part 10 is in an arc shape, and there are six air permeable parts 10 on the circumferential outer side wall of the device.

[0022] The esterification process in the production of dibutyl phthalate: The equipment includes a reaction kettle, a condenser, a separation tower and a water separator. During production, a quantitative amount of phthalic anhydride and a catalyst are put into the esterification kettle at one time, and the raw material butanol is added in several times according to the reaction conditions. The temperature is raised and normal butanol reflux is maintained. The water and butanol formed by the reaction generate an azeotropic vapor and enter the separation tower from the reaction kettle. After removing the entrained liquid in the separation tower, it enters the condenser. After all the vapor is condensed, it enters the water separator (water is at the lower layer and butanol is at the upper layer). The water is discharged in time, and the butanol returns to the reaction kettle again. During the reaction process, the acid value of the material should be measured frequently. When the acid value of the material in the kettle is less than 3.5 mg / g (KOH), the reaction is over.

[0023] In summary, in the present utility model, a distributor 1 and a liquid guide plate 2 are arranged inside the reaction kettle. The liquid guide plate 2 mixes the extractant and phthalic anhydride, and then flows into the distributor 1. The diversion holes 8 in the distributor 1 further mix the reaction liquid and evenly flow into the bottom of the reaction kettle to react with isobutanol. The generated alcohol-water vapor rises to the top of the reaction kettle through the air permeable part 10 and flows out, and the generated dibutyl phthalate flows out from the bottom of the reaction kettle. Thus, the reaction can be carried out quickly without stirring, the energy consumption is reduced, and the reaction rate of the reaction kettle is improved.

[0024] The above description shows and describes several preferred embodiments of the present utility model. However, as mentioned above, it should be understood that the present utility model is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in the relevant field. And the changes and modifications made by those skilled in the art without departing from the spirit and scope of the present utility model should all be within the protection scope of the appended claims of the present utility model.

Claims

1. A distributor applied to an esterification reactor, comprising: Reactor; An extraction agent inlet and a phthalic anhydride inlet are provided on the reactor; It is characterized in that a distributor and a liquid guiding tray are arranged in the reactor, the liquid guiding tray is located above the distributor, and the pipe bodies of the extraction agent inlet and the phthalic anhydride inlet are located above the liquid guiding tray; the liquid guiding tray is circular, with a hemispherical part in the middle, and an overflow plate that bends upward is arranged at the edge of the hemispherical part; the upper edge of the distributor extends out a baffle to form a liquid holding part, and a plurality of shunt holes are arranged at the lower part to form a downstream part, and a plurality of air permeable parts are arranged on the circumferential outer side wall of the distributor.

2. The distributor applied to the esterification reactor as described in claim 1 is characterized in that, The upper end of the shunt hole is a liquid inlet, the middle part is a mixing chamber, a plurality of overflow plates are arranged in the mixing chamber from top to bottom, the lower end is a liquid outlet, and a shunt cover is arranged at the liquid outlet, and the shunt cover has a plurality of through holes.

3. The distributor applied to the esterification reactor according to claim 2, characterized in that, The liquid inlet is in an inverted cone shape.

4. The distributor applied to the esterification reactor according to claim 2, characterized in that, The mixing chamber is in an inverted cone shape, and the overflow plates therein are arranged in a spiral shape from top to bottom.

5. The distributor applied to the esterification reactor according to claim 2, wherein, The diameters of the liquid outlet and the liquid inlet are larger than the diameters of both ends of the mixing chamber.

6. The distributor applied to the esterification reactor as claimed in claim 1, wherein, The cross section of the air permeable part is in an arc shape, and there are six air permeable parts on the circumferential outer side wall of the device.

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