CN219111267U

CN219111267U - Absorption device for hydrolyzing trifluoroacetyl chloride

Info

Publication number: CN219111267U
Application number: CN202320151556.5U
Authority: CN
Inventors: 朱强; 郭忠松; 徐高伟
Original assignee: Yantai Zhongrui Chemical Co ltd
Current assignee: Yantai Zhongrui Chemical Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-06-02
Anticipated expiration: 2033-01-31

Abstract

The utility model relates to an absorption device for hydrolyzing trifluoroacetyl chloride, which belongs to the technical field of absorption devices and comprises a packing tower and an absorber, wherein a packing layer is arranged in the packing tower, a liquid inlet pipe is arranged at the upper end of the packing tower, a liquid outlet pipe is arranged at the lower end of the packing tower, the liquid outlet pipe is communicated with the upper end of the absorber, an air inlet pipe is also communicated with the upper end of the absorber, an absorption assembly is arranged in the absorber, a discharge pipe and an air outlet pipe are communicated with the lower end of the absorber, and the air outlet pipe is communicated with the packing tower. The application has the advantages of high absorptivity and small occupied area.

Description

Absorption device for hydrolyzing trifluoroacetyl chloride

Technical Field

The utility model relates to an absorption device for hydrolyzing trifluoroacetyl chloride, and belongs to the technical field of absorption devices.

Background

At present, the main process for producing trifluoroacetic acid in China is oxidation of fluorochlorohydrocarbon, and the common raw materials of fluorochlorohydrocarbon are trifluorotrichloroethane and sulfur trioxide. There are also catalytic reactions using trifluorodichloroethane and pure oxygen, and the process is not yet well established. These processes all produce trifluoroacetic acid in two steps. Firstly, generating an intermediate trifluoroacetyl chloride, and secondly, hydrolyzing the trifluoroacetyl chloride into trifluoroacetic acid. The reaction rate of the trifluoroacetyl chloride hydrolysis process is influenced by both the reaction rate constant and the diffusion mixing rate of the trifluoroacetyl chloride gas in water. In recent production experience, the hydrolysis rate of trifluoroacetyl chloride has a direct relationship with the reaction absorption equipment, and in the case of absorbing trifluoroacetyl chloride, an absorption device such as an absorption tower is generally used to absorb trifluoroacetyl chloride.

The related Chinese patent with publication number of CN206897125U discloses an absorption tower, which comprises a tower body, an air outlet, a first liquid outlet, an air inlet, a distributor and a spray device, wherein the air outlet is arranged at the top of the tower body, the air inlet is arranged at the lower part of the tower body, the first liquid outlet is arranged at the bottom of the tower body, the spray device is arranged at the upper part of the tower body, and the distributor is arranged at the middle part of the tower body.

The inventor considers that when the absorber is used for absorbing the trifluoroacetyl chloride, the absorption efficiency of a single absorber for the trifluoroacetyl chloride is lower, a plurality of absorbers are connected in series to ensure the hydrolysis rate of the trifluoroacetyl chloride for a production line with higher annual output tonnage (usually more than 4000 tons of annual output), or a large amount of trifluoroacetyl chloride enters an exhaust system to cause waste, but a plurality of absorbers increase the investment of equipment in the early stage of an enterprise and have a particularly large occupied area.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides an absorption device for hydrolyzing trifluoroacetyl chloride.

The technical scheme for solving the technical problems is as follows: the utility model provides an absorbing device for trifluoro acetyl chloride hydrolysis, includes packing tower and absorber, be equipped with the packing layer in the packing tower, packing tower upper end is equipped with the feed liquor pipe, packing tower lower extreme is equipped with down the liquid pipe, it is linked together with the absorber upper end to go down the liquid pipe, the absorber upper end still communicates there is the intake pipe, be equipped with the absorption subassembly in the absorber, absorber lower extreme intercommunication has discharging pipe and outlet duct, the outlet duct is linked together with the packing tower.

Based on the technical scheme, the utility model can also be improved as follows:

further, the discharging pipe of the absorber is communicated with a storage tank, the storage tank is provided with a liquid return pipe, the middle part of the packing tower is provided with a circulating inflow pipe, the liquid return pipe is communicated with the circulating inflow pipe, and the liquid return pipe is provided with a centrifugal pump.

Further, a gas-liquid balance pipe is communicated between the gas outlet pipe and the storage tank.

Further, the absorption assembly comprises a plurality of absorption blocks and gaskets, the absorption blocks are provided with absorption holes, the absorption holes of adjacent absorption blocks are mutually communicated, the gaskets are arranged between the adjacent absorption blocks, and the gaskets are provided with through holes communicated with the absorption holes.

Further, the absorber comprises a shell, an upper end socket and a lower end socket, wherein the shell is arranged between the upper end socket and the lower end socket, a connecting plate is arranged at the upper end of the shell, a flange arranged above the connecting plate is arranged on the shell, a connecting bolt penetrates through the flange and the connecting plate, an upper chamfer flange is arranged at the lower end of the upper end socket, a spring seat is arranged at one end, penetrating out of the upper chamfer flange, of a screw rod of the connecting bolt, and a spring is arranged between the spring seat and the upper chamfer flange.

Further, a first liquid level distributor, a pressing plate, a first packing layer, a first grid plate, a second liquid level distributor, a second packing layer and a second grid plate are sequentially arranged in the packing tower from top to bottom.

Further, the first packing layer and the second packing layer are saddle ring packing layers.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the method, the packing tower and the absorber are arranged, the absorption liquid is in contact with the gas in the absorber, so that the gas can be absorbed, the gas which is not absorbed enters the packing tower from the gas outlet pipe and is in contact with the absorption liquid at the packing layer, and the absorption liquid is used for carrying out secondary absorption on the gas, so that the problems of arranging a plurality of absorption towers and increasing the early operation cost and the occupied area are solved;

2. this application is convenient for keep in the absorption liquid after absorbing gas through setting up the storage tank, is convenient for circulate the absorption liquid simultaneously to can improve the concentration of absorption liquid.

Drawings

FIG. 1 is a schematic structural diagram of an absorption apparatus for hydrolyzing trifluoroacetyl chloride according to an embodiment of the present application;

FIG. 2 is a schematic view showing the structure of a first liquid level distributor according to an embodiment of the present application;

FIG. 3 is a schematic view showing the structure of an absorbent assembly according to an embodiment of the present application.

In the figure, 1, a packed tower; 11. a liquid inlet pipe; 13. a liquid discharging pipe; 14. a circulating inflow pipe; 2. a filler layer; 21. a first filler layer; 22. a second filler layer; 31. a first liquid level distributor; 32. a pressing plate; 33. grid plate I; 34. a liquid level distributor II; 35. grid plate II; 4. an absorber; 41. an air inlet pipe; 42. a discharge pipe; 43. a gas-liquid balance pipe; 44. an air outlet pipe; 5. an absorbent assembly; 51. an absorption block; 52. a gasket; 61. a housing; 62. an upper end enclosure; 63. a lower end enclosure; 64. a connecting plate; 65. pressing blue; 66. a connecting bolt; 67. an upper chamfer flange; 68. a spring seat; 69. a spring; 71. a water inlet; 72. a water outlet; 73. a cooling water flow passage; 8. a storage tank; 81. a liquid return pipe; 82. and (3) a centrifugal pump.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

As shown in fig. 1, fig. 2 and fig. 3, an absorption device for hydrolyzing trifluoroacetyl chloride comprises a packing tower 1 and an absorber 4, the upper end of the packing tower 1 is communicated with a liquid inlet pipe 11, the lower end of the packing tower 1 is provided with a liquid outlet pipe 13, the liquid outlet pipe 13 is communicated with the upper end of the absorber 4, the upper end of the absorber 4 is also communicated with an air inlet pipe 41, an absorption component 5 is arranged in the absorber 4, the lower end of the absorber 4 is communicated with a discharge pipe 42 and an air outlet pipe 44, the air outlet pipe 44 is communicated with the packing tower 1, the absorption liquid is introduced into the packing tower 1 from the liquid inlet pipe 11, the absorption liquid can enter the absorber 4 from the liquid outlet pipe 13, the gas to be absorbed is introduced into the absorber 4 from the air inlet pipe 41, and meets trifluoroacetyl chloride, therefore, the absorption liquid can fully absorb trifluoroacetyl chloride in the absorber 4, the gas which is not absorbed in the absorber 4 can enter the packing tower 1 from the air outlet pipe 44, the absorption liquid can absorb the residual gas in the packing tower 1, the upper end of the packing tower 1 is communicated with an air outlet pipe 42, the air outlet pipe 44 is communicated with the air outlet pipe 44, the air outlet pipe is communicated with the packing tower 1 is convenient to discharge the gas in the absorber 1, the absorption liquid can be arranged in the absorber 4, the absorption device can be reduced in the area of the absorption device is reduced, the absorption area can be increased, and the absorption area can be increased, the absorption area can be increased by the absorption device is further, and the absorption area is reduced, and the absorption area is increased by the absorption area is occupied by the absorption device is 1, and the absorption device is 1.

As shown in fig. 1, 2 and 3, a discharge pipe 42 of an absorber 4 is communicated with a storage tank 8, the storage tank 8 is provided with a liquid return pipe 81, the middle part of a packing tower 1 is provided with a circulating inflow pipe 14, the liquid return pipe 81 is communicated with the circulating inflow pipe 14, the liquid return pipe 81 is provided with a centrifugal pump 82, after absorbing gas, the absorbing liquid is discharged into the storage tank 8 from the discharge pipe 42, the storage tank 8 can temporarily store the gas after absorbing the gas, after the centrifugal pump 82 is started, the centrifugal pump 82 can pump the absorbing liquid in the storage tank 8 into the packing tower 1 again through the liquid return pipe 81 and the circulating inflow pipe 14, so that the absorbing liquid can repeatedly absorb the gas, and the content of the trifluoroacetamide in the absorbing liquid can be improved; a gas-liquid balance pipe 43 is communicated between the gas outlet pipe 44 and the storage tank 8, and the gas pressure among the absorber 4, the packed tower 1 and the storage tank 8 is conveniently balanced through the gas-liquid balance pipe 43.

As shown in fig. 1, 2 and 3, the absorbent assembly 5 includes a plurality of absorbent blocks 51 and gaskets 52, the absorbent blocks 51 are made of graphite, the absorbent blocks 51 are provided with absorbent holes, the absorbent holes of adjacent absorbent blocks 51 are mutually communicated, the gaskets 52 are arranged between the adjacent absorbent blocks 51, the gaskets 52 are provided with through holes communicated with the absorbent holes, the gaskets 52 are made of elastic materials, the gaskets 52 are arranged between the adjacent absorbent blocks 51 and can seal the adjacent absorbent blocks 51, and when the absorbent liquid and the gas are introduced into the absorber 4, the absorbent blocks 51 are provided and the absorbent holes are arranged on the absorbent blocks 51, so that the contact area of the absorbent liquid and the gas can be increased, and the absorption rate of the gas can be increased.

As shown in fig. 1, 2 and 3, the absorber 4 includes a housing 61, an upper seal 62 and a lower seal 63, the housing 61 is disposed between the upper seal 62 and the lower seal 63, the absorber block 51 is disposed in the housing 61, a connecting plate 64 is disposed at an upper end of the housing 61, the housing 61 is provided with a flange 65 disposed above the connecting plate 64, a connecting bolt 66 is disposed between the flange 65 and the connecting plate 64 in a penetrating manner, an upper chamfer flange 67 is disposed at a lower end of the upper seal 62, a spring seat 68 is disposed at one end of the connecting bolt 66, which penetrates through the upper chamfer flange 67, a spring 69 is disposed between the spring seat 68 and the upper chamfer flange 67, the connecting plate 64, the flange 65 and the upper chamfer flange 67 cooperate to achieve a connection effect between the upper seal 62 and the housing 61, a spring seat 68 is disposed at one end of the connecting bolt 66, and a spring 69 is disposed between the spring seat 68 and the upper chamfer flange 67, when the absorber block 51 is thermally expanded in the housing 61, the absorber block 51 can push the upper seal 62 up, and the spring 69 is compressed, thereby reducing the problem of damage of the absorber block 51 after expansion.

As shown in fig. 1, 2 and 3, the lower end of the housing 61 is communicated with a water inlet 71, the upper end of the housing 61 is communicated with a water outlet 72, a cooling water flow channel 73 is reserved between the absorption block 51 and the housing 61, cooling water can be introduced into the cooling water flow channel 73 through the water inlet 71, and the cooling water can flow out from the water outlet 72, so that the temperature of the absorption block 51 can be reduced.

As shown in fig. 1, fig. 2 and fig. 3, the packing layer 2 includes a first packing layer 21 and a second packing layer 22, the first packing layer 21 and the second packing layer 22 are saddle ring packing layers 2, a first liquid level distributor 31, a pressing plate 32, the first packing layer 21, a first grid plate 33, a second liquid level distributor 34, the second packing layer 22 and a second grid plate 35 are sequentially arranged in the packing tower 1 from top to bottom, the absorption liquid can uniformly flow to the first packing layer 21 under the action of the first liquid level distributor 31 after entering the packing tower 1 from the upper end of the packing tower 1, the pressing plate 32 and the first grid plate 33 are arranged to facilitate the installation of the first packing layer 21, the upward gas and the downward absorption liquid can be in contact with the first packing layer 21, so that the absorption liquid can fully absorb the gas, and then can flow to the second liquid level distributor 34 again, the absorption liquid can flow into the second packing layer 22 again, and can contact with the gas again in the second packing layer 22, and the absorption rate of the gas can be improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An absorption device for hydrolyzing trifluoroacetyl chloride, which is characterized in that: including packing tower (1) and absorber (4), be equipped with packing layer (2) in packing tower (1), packing tower (1) upper end is equipped with feed liquor pipe (11), packing tower (1) lower extreme is equipped with down liquid pipe (13), liquid pipe (13) are linked together with absorber (4) upper end down, absorber (4) upper end still communicates there is intake pipe (41), be equipped with absorption assembly (5) in absorber (4), absorber (4) lower extreme intercommunication has discharging pipe (42) and outlet duct (44), outlet duct (44) are linked together with packing tower (1).

2. An absorption device for the hydrolysis of trifluoroacetyl chloride according to claim 1, wherein: the discharging pipe (42) of the absorber (4) is communicated with a storage tank (8), the storage tank (8) is provided with a liquid return pipe (81), the middle part of the packed tower (1) is provided with a circulating inflow pipe (14), the liquid return pipe (81) is communicated with the circulating inflow pipe (14), and the liquid return pipe (81) is provided with a centrifugal pump (82).

3. An absorption device for the hydrolysis of trifluoroacetyl chloride according to claim 2, wherein: a gas-liquid balance pipe (43) is communicated between the gas outlet pipe (44) and the storage tank (8).

4. An absorption device for the hydrolysis of trifluoroacetyl chloride according to claim 1, wherein: the absorption assembly (5) comprises a plurality of absorption blocks (51) and gaskets (52), wherein the absorption blocks (51) are provided with absorption holes, the absorption holes of the adjacent absorption blocks (51) are mutually communicated, the gaskets (52) are arranged between the adjacent absorption blocks (51), and the gaskets (52) are provided with through holes communicated with the absorption holes.

5. An absorption device for the hydrolysis of trifluoroacetyl chloride according to claim 1, wherein: the absorber (4) comprises a shell (61), an upper seal head (62) and a lower seal head (63), wherein the shell (61) is arranged between the upper seal head (62) and the lower seal head (63), a connecting plate (64) is arranged at the upper end of the shell (61), a flange (65) positioned above the connecting plate (64) is arranged on the shell (61), a connecting bolt (66) is arranged between the flange (65) and the connecting plate (64) in a penetrating mode, an upper chamfer flange (67) is arranged at the lower end of the upper seal head (62), a spring seat (68) is arranged at one end, penetrating out of the upper chamfer flange (67), of a screw rod of the connecting bolt (66), and a spring (69) is arranged between the spring seat (68) and the upper chamfer flange (67).

6. An absorption device for the hydrolysis of trifluoroacetyl chloride according to claim 1, wherein: the packing tower (1) is internally provided with a first liquid level distributor (31), a pressing plate (32), a first packing layer (21), a first grid plate (33), a second liquid level distributor (34), a second packing layer (22) and a second grid plate (35) from top to bottom in sequence.

7. An absorption apparatus for the hydrolysis of trifluoroacetyl chloride as recited in claim 6, wherein: the first packing layer (21) and the second packing layer (22) are saddle ring packing layers (2).