A retrofit sulfonation reactor

Abstract

The utility model relates to a kind of modified sulfonation reactor, including tank body and tank cover, tank cover is connected with tank body, the tank body is closed, sulfur trioxide inlet pipe, air pipe and aromatic hydrocarbon raw material inlet pipe are provided on tank cover, gas inlet cavity is sequentially provided in tank body from top to bottom, reaction cavity and gas-liquid separation cavity, gas inlet cavity is conical, gas inlet cavity upper end is communicated with air pipe and aromatic hydrocarbon raw material inlet pipe, gas inlet cavity lower end is provided with atomizing nozzle, sulfur trioxide inlet pipe is communicated with reaction cavity, cooling pipeline is provided in the inner wall interlayer of reaction cavity, microporous plate is provided at the junction of gas-liquid separation cavity and reaction cavity, gas-liquid separation cavity bottom is provided with liquid outlet, the side of gas-liquid separation cavity is provided with tail gas outlet. Tank body is designed as split type, control reaction intensity, reaction cavity and gas-liquid separation cavity are separated by microporous plate, based on the difference of particle size, gas-liquid separation is realized, so that liquid carried in tail gas is separated, and the humidity of tail gas discharged from tail gas outlet meets the standard.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a modified sulfonation reactor. Background Technology

[0002] Sulfonation reactors are crucial chemical equipment specifically designed for sulfonation reactions, the chemical reaction that introduces sulfonic acid groups (-SO3H) into organic compounds. This is a core component in the production of various chemical products, particularly surfactants, dyes, and pharmaceutical intermediates. When sulfur trioxide (SO3), compressed air, and aromatic feedstocks (such as alkylbenzenes) are used in a sulfonation reactor, it is primarily used to produce anionic surfactants, such as sodium alkylbenzene sulfonate, which possesses excellent detergency, foaming, and emulsifying capabilities. Currently, existing sulfonation reactors are integrated units employing gravity settling separation, resulting in exhaust gases rich in acid, reducing yield. Furthermore, current sulfonation reactors often directly introduce sulfur trioxide gas, compressed air, and aromatic feedstocks, leading to extremely vigorous reactions and excessive instantaneous heat release, causing localized overheating and resulting in a series of problems such as coking, discoloration, and the formation of sulfone byproducts, severely impacting product quality. Therefore, improvements are necessary. Utility Model Content

[0003] Therefore, it is necessary to provide a modified sulfonation reactor to address the above problems.

[0004] A modified sulfonation reactor includes a tank body and a tank cover, the tank cover being connected to the tank body and sealing the tank body. The tank cover is provided with a sulfur trioxide inlet pipe, an air pipe, and an aromatic feedstock inlet pipe. The tank body is provided with an inlet chamber, a reaction chamber, and a gas-liquid separation chamber arranged sequentially from top to bottom. The inlet chamber is conical in shape. The upper end of the inlet chamber is connected to the air pipe and the aromatic feedstock inlet pipe, and the lower end of the inlet chamber is provided with an atomizing nozzle. The sulfur trioxide inlet pipe is connected to the reaction chamber. A cooling pipe is provided in the inner wall interlayer of the reaction chamber. A microporous plate is provided at the connection between the gas-liquid separation chamber and the reaction chamber. A liquid outlet is provided at the bottom of the gas-liquid separation chamber, and a tail gas outlet is provided on the side of the gas-liquid separation chamber.

[0005] Preferably, the outer surface of the air intake cavity is provided with spiral prisms.

[0006] Preferably, the inner wall interlayer of the reaction chamber is further filled with a heat-conducting liquid for wrapping the cooling pipes.

[0007] Preferably, a turbulence ring is provided in the reaction chamber at the outlet of the sulfur trioxide inlet pipe.

[0008] The tank body is made of stainless steel, and the tank lid is equipped with a pressure gauge and a temperature gauge for detecting the air pressure and temperature inside the tank.

[0009] The advantages of this utility model are: the tank is designed as a split type, the reaction is carried out in steps, the reaction intensity is controlled, the quality of the finished product is guaranteed, the reaction chamber and the gas-liquid separation chamber are separated by a microporous plate, and gas-liquid separation is achieved based on the difference in particle size, so that the liquid carried in the exhaust gas is separated, and the humidity of the exhaust gas discharged from the exhaust gas outlet meets the standard. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of a modified sulfonation reactor as one embodiment; Figure 2 This is a schematic diagram of a modified sulfonation reactor. Detailed Implementation

[0011] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0012] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0013] Unless otherwise defined, 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0014] like Figures 1-2As shown, a modified sulfonation reactor includes a tank body 1 and a tank cover 2. The tank cover 2 is connected to the tank body 1 and seals the tank body 1. The tank cover 2 is provided with a sulfur trioxide inlet pipe 21, an air pipe 22, and an aromatic raw material inlet pipe 23. The tank body 1 is provided with an inlet chamber 11, a reaction chamber 12, and a gas-liquid separation chamber 13 arranged sequentially from top to bottom. The inlet chamber 11 is conical in shape. The upper end of the inlet chamber 11 is connected to the air pipe 22 and the aromatic raw material inlet pipe 23. The lower end of the inlet chamber 11 is provided with an atomizing nozzle 111. The sulfur trioxide inlet pipe 21 is connected to the reaction chamber 12. A cooling pipe 121 is provided in the inner wall interlayer of the reaction chamber 12. A microporous plate 5 is provided at the connection between the gas-liquid separation chamber 13 and the reaction chamber 12. The bottom of the gas-liquid separation chamber 13 is provided with a liquid outlet 131. The side of the gas-liquid separation chamber 13 is provided with a tail gas outlet 132. Specifically, in this embodiment, sulfur trioxide (SO3) is initially in a liquid state at room temperature. It is first heated and converted to a gaseous state via a vaporizer. Gaseous SO3 is highly reactive; it is then mixed with a large amount of dry compressed air to dilute its concentration to 4%–8% (volume fraction). This is a safety critical step in the entire process, designed to reduce the intensity of the reaction and ensure process control. Aromatic feedstocks, such as linear alkylbenzenes (LAB), are preheated and precisely metered before being introduced into the reactor. In this design, the reactor tank 1 is divided into an inlet chamber 11, a reaction chamber 12, and a gas-liquid separation chamber 13. The conical inlet chamber 11 premixes the compressed air and aromatic feedstock input from the air pipe 22 and the aromatic feedstock inlet pipe 23. Inside the inlet chamber 11, the compressed air tears the aromatic feedstock into millions of micron-sized (typically 10-100 μm) droplets. These droplets are then sprayed into the reaction chamber 12 through atomizing nozzles 111, where they come into contact with sulfur trioxide. The atomized droplets greatly increase the contact area with the SO3 gas, causing a rapid and intense sulfonation reaction on the liquid film surface to produce alkylbenzene sulfonic acid, with the chemical formula R-C6H5 + SO3 → R-C6H4-SO3H. Because the reaction is dispersed across the surface of each tiny droplet when the diluted SO3 gas comes into contact with this "droplet cloud," proceeding in steps, the heat of reaction is rapidly absorbed by the large surface area and the large amount of aromatics themselves, avoiding localized hot spots. The reaction thus becomes mild, uniform, and controllable, and the large amount of heat generated by the SO3 gas reaction is confined within the reaction chamber 12. The heat is carried away through the cooling pipes 121 built into the inner wall of the reaction chamber 12. Understandably, the coolant flowing in the cooling pipes 121 is connected to the external cooling system, so that the coolant can be recycled.A gas-liquid separation chamber 13 is integrated at the bottom of the reaction chamber 12, and the reaction chamber 12 and the gas-liquid separation chamber 13 are separated by a microporous plate 5. Based on the difference in particle size, when the gas-liquid mixture in the reaction chamber 12 passes through the microporous plate 5, gas molecules can pass through the gaps in the mesh, while larger sulfonic acid droplets are intercepted on the microporous plate 5, agglomerate into large droplets, and then fall off by gravity, thereby achieving gas-liquid separation. This allows the liquid carried in the exhaust gas to be separated, and the humidity of the exhaust gas discharged from the exhaust gas outlet 132 meets the standards.

[0015] like Figure 2 As shown, the outer surface of the air intake chamber 11 is provided with spiral prisms 112. The spiral prisms 112 can prevent acid liquid from being adsorbed and attached to the outer surface of the air intake chamber 11, and play a guiding role.

[0016] like Figure 2 As shown, the inner wall interlayer of the reaction chamber 12 is also filled with a heat-conducting liquid for wrapping the cooling pipe 121. The heat-conducting liquid wraps the cooling pipe 121, resulting in higher heat conduction efficiency and faster removal of heat from the reaction chamber 12.

[0017] like Figure 2 As shown, a turbulence ring 122 is provided in the reaction chamber 12 at the outlet of the sulfur trioxide inlet pipe 21. The turbulence ring 122 disperses the columnar sulfur trioxide gas input from the sulfur trioxide inlet pipe 21, so that it is fully mixed with the atomized droplets.

[0018] like Figure 1 As shown, the tank 1 is made of stainless steel, and the tank cover 2 integrates a pressure gauge 3 and a temperature gauge 4 for detecting the air pressure and temperature inside the tank 1. Specifically, the pressure gauge 3 and temperature gauge 4 are used to monitor the pressure and temperature inside the reaction chamber 12 in real time, which facilitates the real-time control of the air intake volume of the sulfur trioxide inlet pipe 21 and the temperature of the coolant in the cooling pipe 121.

[0019] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A modified sulfonation reactor, characterized in that: The device includes a tank body and a tank cover, the tank cover being connected to the tank body to seal the tank body. The tank cover is equipped with a sulfur trioxide inlet pipe, an air pipe, and an aromatic raw material inlet pipe. The tank body is provided with an inlet chamber, a reaction chamber, and a gas-liquid separation chamber arranged sequentially from top to bottom. The inlet chamber is cone-shaped, and its upper end is connected to the air pipe and the aromatic raw material inlet pipe. An atomizing nozzle is provided at the lower end of the inlet chamber. The sulfur trioxide inlet pipe is connected to the reaction chamber. A cooling pipe is provided in the inner wall interlayer of the reaction chamber. A microporous plate is provided at the connection between the gas-liquid separation chamber and the reaction chamber. A liquid outlet is provided at the bottom of the gas-liquid separation chamber, and a tail gas outlet is provided on the side of the gas-liquid separation chamber.

2. The modified sulfonation reactor as described in claim 1, characterized in that: The outer surface of the air intake chamber is provided with spiral prisms.

3. The modified sulfonation reactor as described in claim 1, characterized in that: The inner wall interlayer of the reaction chamber is also filled with a heat-conducting liquid for wrapping the cooling pipes.

4. A modified sulfonation reactor as described in claim 1, characterized in that: A turbulence ring is provided inside the reaction chamber at the outlet of the sulfur trioxide inlet pipe.

5. A modified sulfonation reactor as described in claim 1, characterized in that: The tank body is made of stainless steel, and the tank lid is equipped with a pressure gauge and a temperature gauge for detecting the air pressure and temperature inside the tank.

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