Acrolein absorption tower

Abstract

The utility model discloses an acrolein absorption tower and relates to the technical field of chemical equipment. The acrolein absorption tower provided by the embodiment of the utility model comprises a tower body assembly, the tower body assembly comprises an inner tower body and an outer tower body, the inner tower body and the outer tower body are sleeved inside and outside and are respectively used for absorbing acrolein, and a middle-layer cavity for transferring gas is also arranged between the inner tower body and the outer tower body; the condensation mechanism and the gas transfer pipes are arranged in the middle-layer cavity, one end of each gas transfer pipe is communicated with the top of the inner tower body, and the other end of each gas transfer pipe is communicated with the bottom of the outer tower body.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, and particularly relates to an acrolein absorption tower. Background Art

[0002] Acrolein is a colorless, strongly pungent-smelling, volatile and toxic liquid, which can be dissolved in a variety of organic solvents at room temperature and is widely used in the chemical field. In the production process of acrolein, absorption treatment is required, and currently, generally, an acrolein absorption tower is used for the absorption process.

[0003] The existing production process of acrolein generally adopts the propane oxidation method, and a large amount of acrylic acid by-products will be generated during the production process. Before acrolein absorption, acrylic acid absorption treatment is also required. The traditional process method generally adopts a two-tower process, that is: first, acrylic acid is absorbed into the acrylic acid absorption tower, and then acrolein is absorbed into the acrolein absorption tower. However, the two-tower process has problems such as difficult control of acrolein absorption concentration and easy polymerization of acrolein.

[0004] To solve the above problems, the utility model with the patent number: CN201020570352.8 and the patent name of an acrolein absorption tower discloses a technical solution, that is, using the same absorption tower to absorb acrylic acid and acrolein successively. However, the above technical solution brings some new technical problems, for example: the same absorption tower needs to absorb acrylic acid and acrolein successively, resulting in a very high tower body, a large power of the equipment for pumping the acrolein absorption liquid, high energy consumption. In addition, both acrylic acid and acrolein require a relatively low absorption temperature to avoid the volatilization of acrolein and acrylic acid. And heat is released during the absorption process of acrolein and acrylic acid, and heat exchange equipment needs to be set to cool the inside of the absorption tower. The existing technical solution still needs to carry out heat exchange on different acrylic acid absorption sections and acrolein absorption sections respectively, resulting in low heat exchange efficiency.

[0005] Based on the above background, the inventor designed an acrolein absorption tower, which can solve at least one of the above problems, and thus, this application is proposed. Summary of the Invention

[0006] The purpose of this application is to provide an acrolein absorption tower, which is used to solve the problems in the prior art that the acrolein absorption tower includes an acrylic acid absorption section and an acrolein absorption section, resulting in a high tower body, and the temperature of the acrylic acid absorption section and the acrolein absorption section in the tower body needs to be controlled separately, and the temperature control efficiency is not high.

[0007] To solve the above technical problems, the utility model adopts the following solutions:

[0008] The present application provides an acrolein absorption tower, which comprises a tower body assembly. The tower body assembly includes an inner tower body and an outer tower body that are sleeved inside and outside each other and are respectively used for absorbing acrolein, wherein:

[0009] A middle cavity for transferring gas is further arranged between the inner tower body and the outer tower body;

[0010] It further includes a condensation mechanism and a plurality of gas transfer pipes arranged in the middle cavity. One ends of the gas transfer pipes are all communicated with the top of the inner tower body, and the other ends are all communicated with the bottom of the outer tower body.

[0011] Optionally, the cross-section of the outer tower body is in a circular ring shape or a sector ring shape.

[0012] Optionally, the ratio range of the cross-sectional areas of the inner tower body and the outer tower body is: 0.8 to 1.5.

[0013] Optionally, the cooling ends of the condensation mechanism are respectively connected to the inner tower body and the outer tower body on both sides inside and outside the middle cavity.

[0014] Optionally, it further includes a first packing layer arranged in the inner tower body and used for absorbing acrylic acid, and a second packing layer arranged in the outer tower body and used for absorbing acrolein;

[0015] The cooling ends of the condensation mechanism are arranged close to the first packing layer and the second packing layer.

[0016] Optionally, a plurality of shunt exhaust ports are arranged at the top of the inner tower body and are evenly distributed along its circumferential direction;

[0017] The number of the gas transfer pipes is the same as the number of the shunt exhaust ports, and the gas transfer pipes are all communicated with the inside of the inner tower body through the shunt exhaust ports.

[0018] Optionally, it further includes a first discharge port communicated with the bottom of the inner tower body and used for discharging acrylic acid, and a second discharge port communicated with the bottom of the outer tower body and used for discharging acrolein.

[0019] Optionally, a plurality of exhaust branch pipes are further arranged at the top of the outer tower body, and a main exhaust pipe communicated with the exhaust branch pipes.

[0020] Optionally, it further includes a first spraying mechanism arranged at the top of the inner tower body and a second spraying mechanism arranged at the top of the outer tower body.

[0021] Advantages of the present utility model:

[0022] An acrolein absorption tower of the present application comprises a tower body assembly. The tower body assembly includes an inner tower body and an outer tower body that are sleeved inside and outside each other and are respectively used for absorbing acrolein, wherein:

[0023] A middle cavity for transferring gas is also provided between the inner tower body and the outer tower body;

[0024] It also includes a condensation mechanism and multiple gas transfer pipes arranged in the middle cavity. One end of each gas transfer pipe is connected to the top of the inner tower body, and the other end is connected to the bottom of the outer tower body.

[0025] The design concept is that by redesigning the vertical layout of the acrylic acid absorption section and the acrolein absorption section in the prior art into a new overall layout of internal and external layout, the new problems of excessive tower height, large equipment power for pumping acrolein absorption liquid, and high energy consumption can be solved. At the same time, due to the new internal and external layout design of this application, a condensation mechanism is provided in the annular cavity between the inner tower body and the outer tower body of this application, which can use the same condensation mechanism to control the temperature of both the inner tower body and the outer tower body simultaneously, making the temperature control of this application penetrate into the interior of the tower body components, with good temperature control energy efficiency, and can also effectively solve the problem that in the prior art, when both the acrylic acid absorption section and the acrolein absorption section are arranged in the tower body, the condensation mechanism can only be arranged in the corresponding acrylic acid absorption section and acrolein absorption section, resulting in low temperature control energy efficiency. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of an embodiment of this application.

[0027] Figure 2 is Figure 1 the sectional structural diagram of A-A in

[0028] Description of the Reference Numerals:

[0029] 1 - Inner tower body, 101 - Shunt exhaust port, 11 - First packing layer, 12 - First spraying structure, 13 - Air inlet, 14 - First discharge port, 2 - Outer tower body, 21 - Second packing layer, 22 - Second spraying structure, 23 - Exhaust branch pipe, 24 - Main exhaust pipe, 25 - Second discharge port, 3 - Middle cavity, 4 - Gas transfer pipe, 5 - Condensation mechanism. Detailed Embodiment

[0030] The following further elaborates on the present utility model in detail in conjunction with the embodiments and the drawings, but the implementation manners of the present utility model are not limited thereto.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0032] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "provided with", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0034] As Figure 1 and Figure 2 shown, this embodiment provides an acrolein absorption tower, which includes a tower body assembly. The tower body assembly includes an inner tower body 1 and an outer tower body 2 that are sleeved inside and outside and are respectively used for absorbing acrolein, wherein:

[0035] A middle cavity 3 for transferring gas is further provided between the inner tower body 1 and the outer tower body 2;

[0036] It further includes a condensation mechanism 5 and a plurality of gas transfer pipes 4 arranged in the middle cavity 3. One ends of the gas transfer pipes 4 are all communicated with the top of the inner tower body 1, and the other ends are all communicated with the bottom of the outer tower body 2.

[0037] In this embodiment, by redesigning the vertical layout of the acrylic acid absorption section and the acrolein absorption section in the prior art into a new overall internal and external layout, the problems of excessive tower height, high power consumption of the equipment for pumping acrolein absorption liquid, and high energy consumption can be solved. At the same time, due to the new internal and external layout design of this application, a condensation mechanism 5 is provided in the annular cavity between the inner tower body 1 and the outer tower body 2, which can use the same condensation mechanism 5 to control the temperature of both the inner tower body 1 and the outer tower body 2 simultaneously, enabling the temperature control of this application to penetrate deep into the interior of the tower body assembly, with good temperature control efficiency. It can also effectively solve the problem in the prior art that when both the acrylic acid absorption section and the acrolein absorption section are provided in the tower body, the condensation mechanism 5 can only be provided in the corresponding acrylic acid absorption section and acrolein absorption section, resulting in low temperature control efficiency.

[0038] Optionally, the cross-section of the outer tower body 2 is circular or sector-shaped. In this embodiment, as Figure 2 shown, the cross-section of the outer tower body 2 is circular. In some embodiments, the cross-section of the outer tower body 2 can also be set as a sector shape to facilitate the maintenance of the inner tower body 1.

[0039] Specifically, the ratio range of the cross-sectional areas of the inner tower body 1 and the outer tower body 2 is: 0.8 to 1.5. In this embodiment, the cross-sectional areas of the inner tower body 1 and the outer tower body 2 are the same, and those skilled in the art can adjust the ratio of the cross-sectional areas of the inner and outer tower bodies 2 according to needs. Compared with the prior art of this application, the setting of the cross-sectional area ratio is more flexible.

[0040] Specifically. In this embodiment, the cooling ends of the condensation mechanism 5 are connected to the inner tower body 1 and the outer tower body 2 on both sides inside and outside the middle cavity 3. The condensation mechanism 5 is a prior art and will not be elaborated here.

[0041] Specifically, in this embodiment, it further includes a first packing layer 11 provided in the inner tower body 1 for absorbing acrylic acid, and a second packing layer 21 provided in the outer tower body 2 for absorbing acrolein;

[0042] The cooling ends of the condensation mechanism 5 are arranged close to the first packing layer 11 and the second packing layer 21 to improve the cooling effect.

[0043] Specifically, in this embodiment, a plurality of shunt exhaust ports 101 are provided at the top of the inner tower body 1 and are evenly distributed along its circumference;

[0044] The number of the gas transfer pipes 4 is the same as the number of the shunt exhaust ports 101, and the gas transfer pipes 4 are all connected to the interior of the inner tower body 1 through the shunt exhaust ports 101. By providing the shunt exhaust ports 101 and the gas transfer pipes 4, on the one hand, the uniformity of the intake air can be improved, enabling acrolein to fully contact the absorbent, and on the other hand, the polymerization of acrolein is also inhibited.

[0045] Specifically, in this embodiment, it further includes a first discharge port 14 communicated with the bottom of the inner tower body 1 and used for discharging acrylic acid, and a second discharge port 25 communicated with the bottom of the outer tower body 2 and used for discharging acrolein.

[0046] Specifically, in this embodiment, a plurality of exhaust branch pipes 23 are further arranged at the top of the outer tower body 2, and a main exhaust pipe 24 communicated with the exhaust branch pipes 23, which is convenient for centralized treatment of gases.

[0047] Specifically, in this embodiment, it further includes a first spraying mechanism arranged at the top of the inner tower body 1 and a second spraying mechanism arranged at the top of the outer tower body 2. In this embodiment, the material sprayed by the first spraying mechanism is a first absorbent for absorbing acrylic acid, and the material sprayed by the second spraying structure 22 is a second absorbent for absorbing acrolein. Both the first absorbent and the second absorbent are existing materials and will not be elaborated here.

[0048] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various deformations and improvements can be made without departing from the spirit and essence of the present invention, and these deformations and improvements are also regarded as the protection scope of the present invention.

Claims

1. An acrolein absorption tower, characterized in that, It includes a tower body assembly, and the tower body assembly includes an inner tower body (1) and an outer tower body (2) which are sleeved inside and outside and are respectively used for absorbing acrolein, wherein: A middle cavity (3) for transferring gas is further arranged between the inner tower body (1) and the outer tower body (2); It further includes a condensation mechanism (5) and a plurality of gas transfer pipes (4) arranged in the middle cavity (3). One ends of the gas transfer pipes (4) are all communicated with the top of the inner tower body (1), and the other ends are all communicated with the bottom of the outer tower body (2).

2. The acrolein absorption tower according to claim 1, characterized in that, The cross-section of the outer tower body (2) is in a circular ring shape or a sector ring shape.

3. The acrolein absorption tower according to claim 1, characterized in that, The ratio range of the cross-sectional areas of the inner tower body (1) and the outer tower body (2) is: 0.8 to 1.

5.

4. The acrolein absorption tower according to claim 1, characterized in that, The cooling ends of the condensation mechanism (5) are respectively connected to the inner tower body (1) and the outer tower body (2) on both sides inside and outside the middle cavity (3).

5. The acrolein absorption tower according to claim 4, characterized in that, It further includes a first packing layer (11) arranged in the inner tower body (1) and used for absorbing acrylic acid, and a second packing layer (21) arranged in the outer tower body (2) and used for absorbing acrolein; The cooling ends of the condensation mechanism (5) are arranged close to the first packing layer (11) and the second packing layer (21).

6. The acrolein absorption tower according to claim 1, wherein A plurality of shunt exhaust ports (101) are uniformly distributed along the circumferential direction of the top of the inner tower body (1); The number of the gas transfer pipes (4) is the same as that of the shunt exhaust ports (101), and the gas transfer pipes (4) are all communicated with the inside of the inner tower body (1) through the shunt exhaust ports (101).

7. An acrolein absorption tower according to claim 1, characterized in that, It further includes a first discharge port (14) communicated with the bottom of the inner tower body (1) and used for discharging acrylic acid, and a second discharge port (25) communicated with the bottom of the outer tower body (2) and used for discharging acrolein.

8. The acrolein absorption tower according to claim 1, characterized in that, A plurality of exhaust branch pipes (23) are further arranged at the top of the outer tower body (2), and a main exhaust pipe (24) communicated with the exhaust branch pipes (23).

9. The acrolein absorption tower according to claim 1, characterized in that, It further includes a first spraying mechanism arranged at the top of the inner tower body (1) and a second spraying mechanism arranged at the top of the outer tower body (2).

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