Catalyst reaction reflux tower for R152a production

Abstract

The utility model discloses a catalyst reaction reflux tower for R152a production, which comprises a reflux tower body, the bottom of the reflux tower body is provided with a gas phase inlet pipe and a liquid phase outlet pipe which are communicated with a catalyst reaction kettle, a plurality of distributors are sequentially arranged in the reflux tower body from bottom to top, the side wall of the reflux tower body is provided with a plurality of hand holes corresponding to the distributors, and the hand holes are communicated with the gas phase inlet pipe and the liquid phase outlet pipe. And the top of the reflux tower body is connected with a condenser. In practical application, HCl gas generated by reaction in a catalyst reaction kettle carries part of mixed gas of anhydrous hydrogen fluoride to enter the reflux tower body through the gas phase inlet pipe, and in the rising process of the mixed gas, the mixed gas is in contact with the distributors to be uniformly distributed and then continuously rises to the condenser to be condensed; condensed liquid-phase anhydrous hydrogen fluoride is uniformly distributed by the distributors and then flows back into the catalyst reaction kettle through the liquid-phase outlet pipe to continue to participate in the reaction, so that the reactant anhydrous hydrogen fluoride can be saved, and the utilization rate of raw materials is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to R152a production technical field especially relates to a catalyst reaction back reflux tower for r152a production. BACKGROUND

[0002] R152a (1,1-difluoroethane, chemical formula: CH3CHF2) is a kind of hydrofluorocarbon (HFC) refrigerant, commonly used as R12, R134a and other refrigerants, mainly used in low-temperature refrigeration system, aerosol propellant and foaming agent, etc., used as foaming agent in polyurethane foam plastic production. Environmental protection and refrigeration efficiency, safety is relatively high, thermodynamic performance is good. In the production process of R152a, in order to improve the reaction efficiency, fluorosulfonic acid is usually used as catalyst, fluorosulfonic acid is generated by using chlorosulfonic acid and anhydrous hydrogen fluoride in catalyst reaction kettle, however, in the production process of fluorosulfonic acid, HCl gas generated in the reaction is carried out, and a part of anhydrous hydrogen fluoride is carried, and then the reactant anhydrous hydrogen fluoride is wasted, and the raw material utilization rate is low. SUMMARY

[0003] The purpose of the application is to provide a catalyst reaction back reflux tower for r152a production, to solve the problem that in the production process of fluorosulfonic acid, HCl gas generated in the reaction is carried out, and a part of anhydrous hydrogen fluoride is carried, and then the reactant anhydrous hydrogen fluoride is wasted, and the raw material utilization rate is low.

[0004] To solve the above technical problems, the application provides a catalyst reaction back reflux tower for r152a production, comprising:

[0005] The reflux tower body is provided with a gas phase inlet pipe and a liquid phase outlet pipe communicated with the catalyst reaction kettle at the bottom, a plurality of distributors are sequentially arranged in the reflux tower body from bottom to top, a plurality of hand holes corresponding to the distributors are arranged on the side wall of the reflux tower body, and a condenser is connected to the top of the reflux tower body.

[0006] As a preferred embodiment, a catalyst reaction back reflux tower for r152a production, the inner side wall of the reflux tower body is fixed with a support ring, and the distributor is fixed on the support ring.

[0007] It needs to be specified in the scheme that a catalyst reaction back reflux tower for r152a production, the inner side wall of the reflux tower body is further provided with a grid plate located on the upper side of the distributor.

[0008] As a preferred embodiment, the condenser of the catalyst reaction reflux tower for R152a production comprises a first cylinder, a second cylinder connected with the first cylinder through a first flange, and a top head connected with the second cylinder, a heat exchange pipe is arranged in the first cylinder, the heat exchange pipe is fixed through a fixing assembly, a salt water inlet pipe and a standby pipe are arranged on the lower part of the first cylinder, an exhaust pipe and a salt water outlet pipe are arranged on the upper part of the first cylinder, and a discharge pipe is arranged on the top of the top head.

[0009] As a preferred embodiment, the condenser of the catalyst reaction reflux tower for R152a production comprises a first cylinder, a second cylinder connected with the first cylinder through a first flange, and a top head connected with the second cylinder, a heat exchange pipe is arranged in the first cylinder, the heat exchange pipe is fixed through a fixing assembly, a salt water inlet pipe and a standby pipe are arranged on the lower part of the first cylinder, an exhaust pipe and a salt water outlet pipe are arranged on the upper part of the first cylinder, and a discharge pipe is arranged on the top of the top head.

[0010] As a preferred embodiment, the condenser of the catalyst reaction reflux tower for R152a production comprises a first cylinder, a second cylinder connected with the first cylinder through a first flange, and a top head connected with the second cylinder, a heat exchange pipe is arranged in the first cylinder, the heat exchange pipe is fixed through a fixing assembly, a salt water inlet pipe and a standby pipe are arranged on the lower part of the first cylinder, an exhaust pipe and a salt water outlet pipe are arranged on the upper part of the first cylinder, and a discharge pipe is arranged on the top of the top head.

[0011] As a preferred embodiment, the condenser of the catalyst reaction reflux tower for R152a production comprises a first cylinder, a second cylinder connected with the first cylinder through a first flange, and a top head connected with the second cylinder, a heat exchange pipe is arranged in the first cylinder, the heat exchange pipe is fixed through a fixing assembly, a salt water inlet pipe and a standby pipe are arranged on the lower part of the first cylinder, an exhaust pipe and a salt water outlet pipe are arranged on the upper part of the first cylinder, and a discharge pipe is arranged on the top of the top head.

[0012] Compared with the prior art, the catalyst reaction reflux tower for R152a production comprises a reflux tower body, a gas phase inlet pipe and a liquid phase outlet pipe which are arranged on the bottom of the reflux tower body and are communicated with a catalyst reaction kettle, a plurality of distributors are sequentially arranged in the reflux tower body from bottom to top, a plurality of hand holes corresponding to the distributors are arranged on the side wall of the reflux tower body, and a condenser is connected with the top of the reflux tower body. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the present application, the drawings used in the embodiments will be briefly introduced as follows, and obviously, other drawings can also be obtained by those skilled in the art without any creativity.

[0014] Fig. 1 The structure schematic diagram of the catalyst reaction reflux tower for R152a production provided by the embodiments of the present application is shown in the figure.

[0015] Fig. 2 A distributor structure schematic diagram provided by the embodiment of the application;

[0016] Fig. 3 A grid plate structure schematic diagram provided by the embodiment of the application;

[0017] In the figure: 1, bottom head; 2, third cylinder; 3, second flange; 4, bolt; 5, fourth cylinder; 6, third flange; 7, fourth flange; 8, fifth flange; 9, fifth cylinder; 10, liquid phase outlet pipe; 11, gas phase inlet pipe; 12, support ring; 13, distributor; 14, grid plate; 15, conical cylinder; 16, first cylinder; 160, brine inlet pipe; 161, standby pipe; 162, exhaust pipe; 163, brine outlet pipe; 17, heat exchange pipe; 18, baffle; 19, fixed rod; 20, lug seat; 21, electrostatic grounding plate; 22, tube sheet; 23, first flange; 24, second cylinder; 25, top head; 250, discharge pipe; 26, gasket; 27, nameplate; 28, thermometer; 29, hand hole. DETAILED DESCRIPTION

[0018] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.

[0019] The core of the present application is to provide a catalyst reaction reflux column for R152a production, which solves the problem that in the production process of fluorosulfonic acid, the generated HCl gas will carry a part of anhydrous hydrogen fluoride when it is discharged, thereby causing waste of the reactant anhydrous hydrogen fluoride and low raw material utilization rate.

[0020] Fig. 1 A catalyst reaction reflux column structure schematic diagram for R152a production provided by the embodiment of the application, Fig. 2 A distributor 13 structure schematic diagram provided by the embodiment of the application, Fig. 3 A grid plate 14 structure schematic diagram provided by the embodiment of the application, see Figs. 1 to 3 as shown.

[0021] Embodiment 1

[0022] The application discloses a catalyst reaction reflux tower for R152a production, which comprises a reflux tower body, a bottom head 1 located at the lowest end, a third cylinder 2 connected with the bottom head 1, a fourth cylinder 5 connected with the third cylinder 2 through a second flange, a fifth cylinder 9 connected with the fourth cylinder 5 through a third flange 6, a conical cylinder 15 connected with the fifth cylinder 9 through a fourth flange 7, a gas phase inlet pipe 11 and a liquid phase outlet pipe 10 arranged at the bottom of the third cylinder 2 and communicated with a catalyst reaction kettle, and a nameplate 27 arranged at the outer side of the fourth cylinder 5, so that the type, height, load and other basic information about the reflux tower can be marked on the nameplate 27; a plurality of distributors 13 are sequentially arranged in the reflux tower body from bottom to top, specifically, the distributors 13 are arranged in the fourth cylinder 5 and the fifth cylinder 9, after installation, the distributor 13 in the fourth cylinder 5 is close to the second flange, and the distributor 13 in the fifth cylinder 9 is close to the third flange 6; a plurality of hand holes 29 corresponding to the distributors 13 are arranged at the side wall of the reflux tower body, specifically, the hand holes 29 are arranged at the outer walls of the fourth cylinder 5 and the fifth cylinder 9 close to the distributors 13, and are used for overhauling the distributors 13; and a condenser is connected with the top of the reflux tower body. The HCl gas generated in the catalyst reaction kettle carries part of anhydrous hydrogen fluoride to form mixed gas, the mixed gas enters the reflux tower body through the gas phase inlet pipe 11, rises upwards into the condenser to be condensed, and the condensed liquid phase anhydrous hydrogen fluoride can be refluxed into the catalyst reaction kettle through the liquid phase outlet pipe 10 to continue to participate in the reaction, so that the reaction material anhydrous hydrogen fluoride can be saved, and the raw material utilization rate is improved. In the process, the mixed gas and the condensed liquid phase anhydrous hydrogen fluoride can be uniformly distributed through the distributors 13, and part of the liquid phase anhydrous hydrogen fluoride is prevented from flowing down the wall.

[0023] Example 2

[0024] Based on the example 1, in order to improve the installation stability of the distributor 13, preferably, a supporting ring 12 is fixed to the inner side wall of the reflux tower body, and the distributor 13 is fixed to the supporting ring 12.

[0025] Based on the example 2, in order to further improve the uniformity of the gas phase and the liquid phase, preferably, a grid plate 14 is further arranged at the upper side of the distributor 13 on the inner side wall of the reflux tower body.

[0026] On the basis of embodiment 1, a catalyst reaction reflux tower for R152a production, the condenser comprises a first cylinder 16, a second cylinder 24 connected with the first cylinder 16 through a first flange 23 and a top head 25 connected with the second cylinder 24, a heat exchange pipe 17 is arranged in the first cylinder 16, the heat exchange pipe 17 is fixed through a fixing assembly, a salt water inlet pipe 160 and a standby pipe 161 are arranged at the lower part of the two sides of the first cylinder 16 respectively, an exhaust pipe 162 and a salt water outlet pipe 163 are arranged at the upper part of the two sides of the first cylinder 16 respectively, and a discharge pipe 250 is arranged at the top of the top head 25. In actual design, the first cylinder 16 is connected with the conical cylinder 15 through the fifth flange 8, the two ends of the heat exchange pipe 17 are arranged through the tube plate 22 on the first flange 23 and the fifth flange 8, and in use, the ascending mixed gas enters into the heat exchange pipe 17 and exchanges heat with the salt water entering into the condenser through the salt water inlet pipe 160. The heat exchanged salt water can be discharged through the salt water outlet pipe 163, and the HCl gas can be finally discharged through the discharge pipe 250. The first flange 23, the second flange, the third flange 6, the fourth flange 7 and the fifth flange 8 are arranged in pairs and a gasket is arranged between each pair of flanges, and each pair of flanges is connected through the bolt 4.

[0027] In this embodiment, a catalyst reaction reflux tower for R152a production, in order to improve the support stability of the heat exchange pipe 17, preferably, the fixing assembly comprises a baffle 18 and a fixing rod 19 fixed with the tube plate 22 on the first flange 23, the lower end of the fixing rod 19 is fixedly connected with the baffle 18, and the heat exchange pipe 17 is fixedly connected with the baffle 18.

[0028] In this embodiment, a catalyst reaction reflux tower for R152a production, in order to detect the temperature in the condenser, preferably, a thermometer 28 is further arranged on one side of the second cylinder 24.

[0029] On the basis of embodiment 1, a catalyst reaction reflux tower for R152a production, in order to facilitate the installation and fixation of the reflux tower, preferably, an ear seat 20 is arranged at the side wall of the reflux tower body and the first cylinder 16, and an electrostatic grounding plate 21 is further arranged on the ear seat 20 of the first cylinder 16, in order to facilitate the electrostatic grounding of each reflux tower, the resistance value of the electrostatic grounding should be less than 10 ohms.

[0030] The utility model provides a kind of catalyst reaction reflux column for R152a production, including reflux column body, the bottom of reflux column body is provided with and catalyst reaction kettle intercommunication gas phase inlet pipe 11 and liquid phase outlet pipe 10, multiple distributors 13 are sequentially arranged in reflux column body from bottom to top, multiple hand holes 29 corresponding with distributor 13 are arranged at the side wall of reflux column body, the top of reflux column body is connected with condenser.In actual application, the mixed gas of HCl gas generated in the reaction of catalyst reaction kettle and part of anhydrous hydrogen fluoride is carried into reflux column body by gas phase inlet pipe 11, in the process of mixed gas rising, after being uniformly distributed by each distributor 13, it continues to rise to condenser and is condensed, after condensation, liquid phase anhydrous hydrogen fluoride is evenly distributed by each distributor 13, and then refluxes into catalyst reaction kettle by liquid phase outlet pipe 10 and continues to participate in reaction, to save reactant anhydrous hydrogen fluoride, improve raw material utilization.

[0031] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope of the application being indicated by the following claims.

[0032] It should be understood that the application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The implementations of the application set forth herein are by way of example and not meant to be limiting.

Claims

1. A catalyst reaction backflow column for R152a production, characterized by, Include: The reflux tower body is provided with a gas phase inlet pipe (11) and a liquid phase outlet pipe (10) at the bottom and communicated with the catalyst reactor, a plurality of distributors (13) are sequentially arranged in the reflux tower body from bottom to top, a plurality of hand holes (29) corresponding to the distributors (13) are arranged at the side wall of the reflux tower body, and a condenser is connected to the top of the reflux tower body.

2. The catalyst reaction backflow column for R152a production according to claim 1, characterized by, The inner side wall of the reflux tower body is fixed with a support ring (12), and the distributor (13) is fixed on the support ring (12).

3. The catalyst reaction backflow column for R152a production according to claim 2, characterized by, The inner side wall of the reflux tower body is further provided with a grid plate (14) located on the upper side of the distributor (13).

4. The catalyst reaction backflow column for R152a production according to claim 1, characterized by, The condenser comprises a first cylinder (16), a second cylinder (24) connected with the first cylinder (16) through a first flange (23), and a top head (25) connected with the second cylinder (24), a heat exchange pipe (17) is arranged in the first cylinder (16), the heat exchange pipe (17) is fixed by a fixing assembly, salt water inlet pipes (160) and standby pipes (161) are respectively arranged at the lower part of both sides of the first cylinder (16), exhaust pipes (162) and salt water outlet pipes (163) are respectively arranged at the upper part of both sides of the first cylinder (16), and a discharge pipe (250) is arranged at the top of the top head (25).

5. The catalyst reaction backflow column for R152a production according to claim 4, characterized by, The fixing assembly comprises a baffle (18) and a fixing rod (19) fixed with a tube plate (22) on the first flange (23), the lower end of the fixing rod (19) is fixedly connected with the baffle (18), and the heat exchange pipe (17) is fixedly connected with the baffle (18).

6. The catalyst reaction backflow column for R152a production according to claim 4, characterized by, One side of the second cylinder (24) is further provided with a thermometer (28).

7. The catalyst reaction backflow column for R152a production according to claim 4, characterized by, The side walls of the reflux tower body and the first cylinder (16) are both provided with lug seats (20).

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