An acid mist absorption tower for succinic acid production

Abstract

A kind of acid mist absorption tower for succinic acid production, it relates to the technical field of succinic acid production, including tower body, the lower end side of the tower body is equipped with inlet pipe, the inlet pipe extends to the tower body and is connected with gas distributor, the lower side of the gas distributor is equipped with liquid collecting tank, the side of the liquid collecting tank is equipped with liquid outlet pipe, the upper side of the gas distributor is equipped with filter, the upper side of the filter is equipped with packing layer, the upper side of the packing layer is equipped with liquid distributor, the liquid distributor is communicated with inlet pipe in the upper end side of tower body, the top of the tower body is equipped with outlet pipe, when using, lye enters liquid distributor in inlet pipe, is sprayed to packing in liquid distributor, and flows down along packing surface, acid mist gas enters from tower bottom, after distribution by gas distributor, with lye, continuous through the interstice of packing layer, on packing surface, gas-liquid two-phase close contact carries out neutralization reaction, finally clean gas is discharged by outlet pipe.

Description

Technical Field

[0001] This utility model relates to the field of succinic acid production technology, specifically to an acid mist absorption tower for succinic acid production. Background Technology

[0002] The electrolytic synthesis of succinic acid produces acid mist containing water, oxygen, sulfuric acid, maleic acid, and succinic acid. Acid mist typically refers to a mist-like form of acidic substances. In the air, acid mist particles are very small, smaller than water mist particles but with higher humidity than smoke, with a particle size of 0.1–10 μm, placing it between flue gas and water mist. Acid mist is not only harmful to human health but also pollutes the environment, corroding buildings and metal structures and affecting plant growth; therefore, acid mist cannot be directly emitted.

[0003] The equipment commonly used for purifying acid mist is the acid mist absorption tower. Currently, conventional acid mist absorption towers typically spray alkaline liquid through spray pipes, allowing the alkaline liquid to come into contact with the acid mist and undergo a neutralization reaction. However, the spray pipes need to continuously spray a large amount of alkaline liquid, and the contact area between the sprayed alkaline liquid and the acid mist is limited, resulting in a large amount of alkaline liquid used and a low utilization rate. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an acid mist absorption tower for succinic acid production, which can solve the problem of large consumption and low utilization rate of alkaline liquid when conventional acid mist absorption towers use spray pipes to spray alkaline liquid to neutralize acid mist.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An acid mist absorption tower for succinic acid production includes a tower body, an inlet pipe at the lower end of the tower body extending into the tower body and connected to a gas distributor, a liquid collection tank below the gas distributor, an outlet pipe on one side of the liquid collection tank, a filter above the gas distributor, a packing layer above the filter, a liquid distributor above the packing layer, the liquid distributor being connected to the inlet pipe at the upper end of the tower body, and an outlet pipe at the top of the tower body.

[0007] Preferably, the gas distributor includes a main gas pipe, one end of which is connected to an air inlet pipe, and several branch gas pipes are equidistantly distributed on both sides of the main gas pipe, with an air outlet at the top of each branch gas pipe.

[0008] Preferably, the liquid distributor includes a slot, the inner wall of which is connected to the outer wall of the bottom end of the liquid inlet pipe, a liquid permeation hole is provided at the bottom of the slot, a liquid distribution groove is provided at the bottom of the liquid permeation hole, and liquid outlet holes are provided on both sides of the liquid distribution groove.

[0009] Preferably, the packing layer includes a support plate, the support plate is provided with packing material, and the top of the packing material is provided with a packing pressure plate.

[0010] Preferably, the packing material is a Pall ring random packing material.

[0011] Preferably, the filter is inclined and fixed to the inner wall of the tower body by screws, and the filter layer of the filter is made of wire mesh material.

[0012] Preferably, a level gauge is installed on the liquid collection tank.

[0013] Compared with existing technologies, the beneficial effects of this invention are as follows: In use, the alkaline solution enters the liquid distributor through the inlet pipe, is sprayed onto the packing material, and flows down the packing surface. Acid mist gas enters from the bottom of the tower, is distributed by the gas distributor, and flows counter-currently with the alkaline solution through the voids of the packing layer. On the packing surface, the gas and liquid phases come into close contact for a neutralization reaction. The Pall ring random packing effectively increases the packing surface area, thereby increasing the contact area between the acid mist and the alkaline solution, increasing the mass transfer rate between them, and improving the adsorption effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the gas distributor structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the liquid distributor structure of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1-Tower body, 2-Inlet pipe, 3-Gas distributor, 31-Main gas pipe, 32-Divider pipe, 33-Outlet, 4-Liquid collection tank, 5-Liquid outlet pipe, 6-Filter, 7-Packing layer, 71-Support plate, 72-Packing, 73-Packing pressure plate, 8-Liquid distributor, 81-Slot, 82-Liquid permeation hole, 83-Divider tank, 84-Outlet, 9-Inlet pipe, 10-Outlet pipe, 11-Level gauge. Detailed Implementation

[0020] The invention will now be described in detail with reference to the accompanying drawings, by way of example. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Example

[0021] like Figures 1 to 3 As shown, this utility model discloses an acid mist absorption tower for succinic acid production, including a tower body 1. An outlet pipe 10 is provided at the top of the tower body 1, and an inlet pipe 2 is provided on one side of the lower end of the tower body 1. The inlet pipe 2 extends into the tower body 1 and is connected to a gas distributor 3. The gas distributor 3 includes a main gas pipe 31, one end of which is connected to the inlet pipe 2. Several branch gas pipes 32 are equidistantly distributed on both sides of the main gas pipe 31, and each branch gas pipe 32 has an outlet hole 33 at its top. By setting the gas distributor 3, the acid mist can be evenly distributed into the tower. The acid mist enters the main gas pipe 31 through the inlet pipe 2, flows through each branch gas pipe 32, and is discharged through the outlet hole 33.

[0022] Below the gas distributor 3 is a liquid collection tank 4, on which a liquid level gauge 11 is installed. A liquid outlet pipe 5 is provided on one side of the liquid collection tank 4. The liquid collection tank 4 is used to collect alkaline solution and acid solution that drips down after filtration. When the liquid level gauge 11 measures that the liquid level in the liquid collection tank 4 reaches a certain value, the liquid is discharged through the liquid outlet pipe 5.

[0023] A filter 6 is installed above the gas distributor 3. The filter 6 is inclined and fixed to the inner wall of the tower body 1 by screws. The filter layer of the filter 6 is made of wire mesh, which is made of polyethylene or corrosion-resistant stainless steel. With the filter 6 having a wire mesh filter layer, acid mist droplets of different sizes are suspended in the airflow. Due to mutual collisions, they agglomerate into larger particles. When passing through the wire mesh layer, the channel is curved and narrow. Under the action of inertia and hooking effects, they stay on the wire mesh. The continuous adhesion causes the fine acid droplets to grow larger and fall down, finally flowing into the collection tank 4. The inclined setting of the filter 6 facilitates the downward dripping of acid droplets.

[0024] The filter 6 is topped with a packing layer 7, which includes a support plate 71. Packing material 72, a type of Pall ring random packing, is mounted on the support plate 71. A packing pressure plate 73 is located on top of the packing material 72 to prevent it from being blown away by the rising airflow. The Pall ring random packing effectively increases the surface area of ​​the packing, thereby increasing the contact area between the acid mist and the alkali solution, increasing the mass transfer rate between them, and improving the adsorption effect.

[0025] A liquid distributor 8 is provided above the packing layer 7. The liquid distributor 8 is connected to the inlet pipe 9 on one side of the upper end of the tower body 1. The liquid distributor 8 includes a slot 81, the inner wall of which is connected to the outer wall of the bottom end of the inlet pipe 9. A liquid permeation hole 82 is provided at the bottom of the slot 81, and a distribution trough 83 is provided at the bottom of the liquid permeation hole 82. Liquid outlet holes 84 are provided on both sides of the distribution trough 83. By setting up the liquid distributor 8, the alkali solution can be evenly distributed on the packing layer 7 in the tower. The alkali solution enters the slot 81 through the inlet pipe 9, and then flows into the distribution trough 83 through the liquid permeation hole 82 at the bottom of the slot 81. When the liquid level in the distribution trough 83 reaches a certain height, the alkali solution will flow out from the outlet hole 84, fall onto the packing layer 7, and flow down along the surface of the packing 72.

[0026] Working principle: During use, the alkali solution enters the tower body 1 through the inlet pipe 9 and the liquid distributor 8, flows through the packing layer 7 and flows downward along the surface of the packing 72. The acid mist gas enters the tower body 1 through the inlet pipe 2 and the gas distributor 3. The gas floats up and first passes through the filter 6 to filter out the acid mist droplets in the gas. The filtered fine acid mist droplets condense into large acid mist droplets and flow into the collection tank 4. The filtered gas continues to move upward and undergoes a neutralization reaction with the alkali solution in the packing layer 7. After the reaction is completed, the clean gas is discharged through the outlet pipe 10, and the alkali solution falls into the collection tank 4 for unified collection.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and application concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An acid mist absorption tower for succinic acid production, comprising a tower body (1), characterized in that: The tower body (1) is provided with an air inlet pipe (2) on one side of the lower end. The air inlet pipe (2) extends into the tower body (1) and is connected to a gas distributor (3). A liquid collection tank (4) is provided below the gas distributor (3). A liquid outlet pipe (5) is provided on one side of the liquid collection tank (4). A filter (6) is provided above the gas distributor (3). A packing layer (7) is provided above the filter (6). A liquid distributor (8) is provided above the packing layer (7). The liquid distributor (8) is connected to the liquid inlet pipe (9) on one side of the upper end of the tower body (1). An air outlet pipe (10) is provided at the top of the tower body (1).

2. The acid mist absorption tower for succinic acid production as described in claim 1, characterized in that: The gas distributor (3) includes a main gas pipe (31), one end of which is connected to the inlet pipe (2). Several branch pipes (32) are distributed at equal intervals on both sides of the main gas pipe (31), and an outlet hole (33) is opened at the top of the branch pipe (32).

3. The acid mist absorption tower for succinic acid production as described in claim 1, characterized in that: The liquid distributor (8) includes a slot (81), the inner wall of the slot (81) is connected to the outer wall of the bottom end of the liquid inlet pipe (9), a liquid permeation hole (82) is provided at the bottom of the slot (81), a liquid distribution groove (83) is provided at the bottom of the liquid permeation hole (82), and liquid outlet holes (84) are provided on both sides of the liquid distribution groove (83).

4. The acid mist absorption tower for succinic acid production as described in claim 1, characterized in that: The packing layer (7) includes a support plate (71), on which packing (72) is provided, and a packing pressure plate (73) is provided on the top of the packing (72).

5. The acid mist absorption tower for succinic acid production as described in claim 4, characterized in that: The packing material (72) is a Pall ring random packing material.

6. The acid mist absorption tower for succinic acid production as described in claim 1, characterized in that: The filter (6) is inclined and fixed to the inner wall of the tower body (1) by screws. The filter layer of the filter (6) is made of wire mesh.

7. The acid mist absorption tower for succinic acid production as described in claim 1, characterized in that: A level gauge (11) is installed on the liquid collection tank (4).

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