An apparatus for collecting and treating tail gas from an acyl chloride reaction

Abstract

This utility model discloses a device for collecting and treating tail gas from an acyl chloride reaction, belonging to the field of tail gas collection and treatment technology. Multiple collection and treatment tanks are connected by connecting pipes, each equipped with an electrically controlled valve. Each collection and treatment tank has upper and lower side pipes on its side walls, which are connected to each other to allow for the input of treatment agents. The outermost collection and treatment tank is connected to a filter cartridge via a connecting pipe. An exhaust assembly is installed at the upper end of the filter cartridge, and one end of the exhaust assembly is connected to a particle collection cylinder. This device effectively filters particulate matter and dust from the acyl chloride reaction tail gas through the particle collection cylinder and internal filter bags, ensuring clean tail gas emissions and reducing environmental pollution. Multiple chemical treatment tanks can be used to input appropriate chemical treatment agents through different feed pipes according to the tail gas composition and treatment requirements, enabling targeted tail gas treatment and improving the flexibility and efficiency of the treatment process.

Description

Technical Field

[0001] This utility model relates to the field of tail gas collection and treatment technology, and in particular to a tail gas collection and treatment device for acyl chloride reaction. Background Technology

[0002] The tail gas produced by acyl chloride reactions mainly originates from the acyl chloride process itself, which involves the reaction of acyl compounds with reactive chlorinating agents to generate acyl chloride compounds. This tail gas typically contains toxic and harmful substances such as hydrogen chloride (HCl) and sulfur dioxide (SO2). These substances can pose threats to human health, such as causing respiratory diseases, and may also lead to environmental problems, such as acid rain. Various devices and methods are commonly used in industry for the collection and treatment of tail gas from acyl chloride reactions.

[0003] Chemical absorption devices, such as those using sodium hydroxide (NaOH) or sodium carbonate (Na2CO3) solutions as absorbents, can effectively absorb HCl and SO2 from exhaust gases. These absorbents react chemically with the acidic gases in the exhaust gas to form corresponding salts, thereby purifying the exhaust gas. For example, in a falling film absorber, the exhaust gas passes through a falling film-flowing absorbent; HCl is absorbed to form hydrochloric acid, while SO2 can be further chemically processed into products such as sodium sulfite.

[0004] Physical absorption devices primarily utilize the differences in solubility of different gases in exhaust gas to separate them using absorbents. For example, glycerol or similar absorbents are used in an absorption tower to absorb phosgene and hydrogen chloride from the exhaust gas. The absorbent is then heated and mixed with a catalyst to produce downstream products such as epichlorohydrin. Furthermore, physical absorption recycling devices can recover phosgene from the exhaust gas and reintroduce it into the system for reuse, thereby maximizing resource utilization.

[0005] For the tail gas from the thionyl chloride chlorination reaction, a multi-stage series of falling film absorbers can be used for treatment. These falling film absorbers typically include a hydrochloric acid absorber, a sulfur dioxide drying tower, and a sulfur dioxide collection tower. The tail gas first enters the hydrochloric acid absorber, where the HCl is absorbed by water to form hydrochloric acid; then, the tail gas enters the sulfur dioxide drying tower for cooling and drying; finally, in the sulfur dioxide collection tower, it is cooled with chilled brine to obtain liquid sulfur dioxide. This device not only effectively purifies the tail gas but also allows for the recovery and reuse of useful components from it.

[0006] In the acylation reaction process, the tail gas collection and treatment device plays a crucial role. However, the tail gas from the acylation reaction contains a variety of substances, including but not limited to hydrogen chloride, sulfur dioxide, thionyl chloride, and possibly solvents and other inert gases. The proportions and concentrations of these components in the tail gas often vary depending on the reaction conditions, the type of raw materials, and the operating method. In addition, particulate impurities may also be present in the tail gas, which may originate from reactants, catalysts, or equipment wear. These complex tail gas components and particulate impurities can negatively impact the treatment effect when they enter the chemical treatment tank, such as reducing absorption efficiency and clogging the treatment equipment.

[0007] Chemical treatment tanks require the introduction of specific chemical reagents to react with harmful substances in exhaust gases, thereby purifying them. However, due to the complexity of exhaust gas composition, chemical treatment tanks often require different reagents for different components. This not only increases treatment costs, but also necessitates strict control over the selection, formulation, and dosage of reagents during actual operation; otherwise, the treatment effect will be severely compromised. For example, improper reagent selection or insufficient dosage may result in the ineffective removal of harmful substances from the exhaust gas, leading to environmental pollution. Utility Model Content

[0008] The main objective of this invention is to provide a device for collecting and treating tail gas from acyl chloride reactions, which can effectively solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An acyl chloride reaction tail gas collection and treatment device includes a collection and treatment tank, an upper pipe, and a lower pipe. The upper ends of multiple collection and treatment tanks are connected by an upper pipe, and the lower ends of multiple collection and treatment tanks are connected by a lower pipe. Multiple collection and treatment tanks are connected by connecting pipes. Each connecting pipe is equipped with an electrically controlled valve. Each collection and treatment tank has an upper side pipe and a lower side pipe on its side wall. Multiple upper side pipes and lower side pipes are connected by pipes, and the treatment agent is input through the upper side pipes and lower side pipes. The outermost collection and treatment tank is connected to a filter cartridge via a connecting pipe, and an exhaust assembly is installed at the upper end of the filter cartridge. One end of the exhaust assembly is connected to a particle dust collection cylinder, and the upper end of the particle dust collection cylinder is connected to an air inlet pipe. The exhaust gas from the acyl chlorination reaction is input through the air inlet pipe, and then dust particles and debris are collected through the particle dust collection cylinder and the filter cartridge. Finally, the acyl chlorination reaction exhaust gas is chemically treated through the collection and treatment tank.

[0010] In a further optional embodiment, a discharge port is installed at the lower end of the particle ash collection cylinder and the filter cylinder. The discharge port is designed in the shape of a frustum. The lower end of the discharge port is connected to a plug through a flange, and a sealing ring is provided at the connection. The upper end of the particle ash collection cylinder is connected to a sealing cover through a buckle and a hinge. The air inlet pipe is connected to the sealing cover through a flange, and a sealing ring is provided at the connection. A filter bag is installed inside the particle ash collection cylinder. In a further optional embodiment, the exhaust assembly includes an exhaust fan and a filter bag. The filter bag is connected to the upper end of the filter cylinder. The exhaust fan is installed at the upper end of the filter cylinder and extracts the gas inside the particle collection cylinder, which is then filtered through the filter bag inside the filter cylinder. In a further alternative, the connecting pipe is connected to the collection and treatment tank via a flange, multiple collection and treatment tanks are equidistantly distributed, and the lower end of the collection and treatment tank is provided with a placement seat; A further alternative is that a valve is installed on the upper pipe of each of the collection and treatment tanks, and a valve is connected to the lower pipe of each collection and treatment tank, so that the input and discharge of materials in the collection and treatment tanks can be realized through the valves; In a further alternative, multiple upper pipes are connected by a main pipe, and multiple lower pipes are connected by a main pipe. A control valve is installed on the main pipe, and the input of different chemical treatment agents in the collection and treatment tank is realized through the upper and lower pipes.

[0011] Compared with the prior art, the present invention has the following beneficial effects: Through the particle collection cylinder and internal filter bags, this equipment can effectively filter out particulate matter and dust in the tail gas of acyl chlorination reaction, ensuring the cleanliness of the tail gas emissions and reducing environmental pollution.

[0012] The setup of multiple chemical treatment tanks allows for targeted tailored treatment by introducing appropriate chemical agents into each tank through different feed pipes, based on the specific composition and treatment requirements of the exhaust gas. This design enhances the flexibility and efficiency of exhaust gas treatment. Through the control of connecting pipes and electrically controlled valves, the gas flow between the tanks can be precisely adjusted, achieving uniform distribution and effective treatment of the exhaust gas and preventing excessive accumulation or undertreatment of exhaust gas in any single tank.

[0013] The equipment features a rationally designed discharge port, employing a frustum shape and equipped with a sealing ring and plug to ensure smooth and airtight discharge of impurities. Regular inspection and cleaning of the discharge port prevents equipment blockage or malfunction caused by impurity accumulation. Precise control of valves and electrically controlled valves enables precise management of material input and output, ensuring the safety and stability of the exhaust gas treatment process. This design not only improves the efficiency of exhaust gas treatment but also reduces operational risks and costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the overall structure of this utility model; Figure 3 This is a top view of the overall structure of this utility model; Figure 4 The images show the collection and processing tank, particle ash collection cylinder, and filter cylinder of this utility model.

[0015] In the diagram: 1. Particle ash collection cylinder; 2. Air inlet pipe; 3. Exhaust assembly; 4. Filter cylinder; 5. Discharge port; 6. Connecting pipe; 7. Collection and treatment tank; 8. Upper pipe; 9. Lower pipe; 10. Connecting pipe; 11. Electrically controlled valve; 12. Upper side pipe; 13. Lower side pipe. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figure 1 - Figure 4 As shown, an acyl chloride reaction tail gas collection and treatment device includes multiple collection and treatment tanks 7, an upper pipe 8, a lower pipe 9, and a connecting pipe 10. The upper ends of the multiple collection and treatment tanks 7 are connected to each other through an upper pipe 8, and their lower ends are connected through a lower pipe 9. These collection and treatment tanks 7 are interconnected through the connecting pipes 10, and each connecting pipe 10 is equipped with an electrically controlled valve 11 to control the gas flow between the various collection and treatment tanks 7.

[0018] Each collection and treatment tank 7 has an upper side pipe 12 and a lower side pipe 13 on its side wall. These upper side pipes 12 and lower side pipes 13 are interconnected by pipes to allow the input of the treatment agent. The outermost collection and treatment tank 7 is connected to the filter cartridge 4 via a connecting pipe 6. An exhaust assembly 3 is installed at the upper end of the filter cartridge 4. One end of the exhaust assembly 3 is connected to a particle ash collection cylinder 1, and the upper end of the particle ash collection cylinder 1 is connected to an air inlet pipe 2, through which the tail gas of the acyl chlorination reaction is input.

[0019] At the lower end of the particle collection cylinder 1 and the filter cylinder 4, a discharge port 5 is installed. The discharge port 5 has a frustum-shaped design, and its lower end is connected to a plug via a flange, with a sealing ring at the connection to ensure airtightness. At the upper end of the particle collection cylinder 1, a sealing cover is connected via a latch and hinge. The air inlet pipe 2 is connected to the sealing cover via a flange, with a sealing ring at the connection to prevent gas leakage. A filter bag is installed inside the particle collection cylinder 1 to further filter dust particles and impurities from the gas.

[0020] The exhaust assembly 3 mainly includes an exhaust fan and a filter bag. The filter bag is connected to the upper opening of the filter cylinder 4, and the exhaust fan is installed at the upper end of the filter cylinder 4 and is responsible for extracting the gas from the particle collection cylinder 1. Impurities in the gas can be effectively filtered out through the filter bag inside the filter cylinder 4.

[0021] The connecting pipe 6 is connected to the collection and treatment tank 7 via a flange. Multiple collection and treatment tanks 7 are equidistantly distributed to ensure the stability and uniformity of the device. Each collection and treatment tank 7 is equipped with a placement seat at its lower end to facilitate stable placement of the device.

[0022] To better control the input and output of materials, valves are installed on the upper pipe 8 of each collection and treatment tank 7, and valves are also connected to the lower pipe 9 of each collection and treatment tank 7. These valves enable precise control of the materials inside the collection and treatment tank 7.

[0023] Multiple upper pipes 12 are connected by a main pipe, and multiple lower pipes 13 are also connected by a main pipe. Control valves are installed on these main pipes, allowing the input of different chemical treatment agents into the collection and treatment tank 7 via the upper pipes 12 and lower pipes 13, thereby ensuring the high efficiency and safety of exhaust gas treatment.

[0024] Multiple collection and treatment tanks 7 are placed at predetermined locations with equal spacing, ensuring that each tank 7 has a base at its lower end for stable placement. Next, an upper pipe 8 is connected to the upper end of each tank 7, and a lower pipe 9 is connected to the lower end of each tank 7. Flange connections are used at the joints, and sealing rings are installed at the joints to ensure a tight seal.

[0025] A connecting pipe 10 is installed between each collection and treatment tank 7, and an electrically controlled valve 11 is installed on each connecting pipe 10. Next, an upper side pipe 12 and a lower side pipe 13 are installed on the side wall of each collection and treatment tank 7, and these upper side pipes 12 and lower side pipes 13 are connected to each other through pipes to realize the input of treatment agent.

[0026] The outermost collection and treatment tank 7 is connected to the filter cylinder 4 via a connecting pipe 6, and an exhaust assembly 3 is installed at the upper end of the filter cylinder 4. One end of the exhaust assembly 3 is connected to the particle ash collection cylinder 1, and the upper end of the particle ash collection cylinder 1 is connected to the air inlet pipe 2 to input the tail gas from the acyl chlorination reaction. A discharge port 5 is installed at the lower end of the particle ash collection cylinder 1 and the filter cylinder 4, ensuring that the discharge port 5 adopts a frustum-shaped design, with a plug connected to the lower end via a flange, and a sealing ring is provided at the connection.

[0027] The upper end of the particle collection cylinder 1 is connected to a sealing cover via a latch and hinge. The air inlet pipe 2 is connected to the sealing cover via a flange, and a sealing ring is provided at the connection. A filter bag is installed inside the particle collection cylinder 1 to further filter dust particles and impurities in the gas. The filter bag is connected to the upper opening of the filter cylinder 4, and the exhaust fan is installed at the upper end of the filter cylinder 4. Check that all connections are properly sealed and ensure that all valves and electrically controlled valves 11 are functioning correctly.

[0028] The tail gas from the acyl chloride reaction is fed into the particulate dust collection cylinder 1 through the air inlet pipe 2. The exhaust fan of the exhaust assembly 3 is turned on to extract the gas from the particulate dust collection cylinder 1, and the impurities in the gas are filtered out through the filter bag in the filter cylinder 4.

[0029] As needed, different chemical treatment agents are introduced into the collection and treatment tank 7 through the upper pipe 12 and the lower pipe 13 to treat the exhaust gas. By controlling the electrically controlled valve 11 on the connecting pipe 10, the gas flow between the various collection and treatment tanks 7 can be controlled, thereby achieving effective treatment of the exhaust gas.

[0030] During the treatment process, the discharge port 5 is checked regularly. When a certain amount of impurities accumulate, the plug of the discharge port 5 is opened to discharge the impurities. Simultaneously, the filter bags in the particle collection cylinder 1 and filter cylinder 4 are checked regularly, and replaced promptly when they are clogged or damaged. During operation, the input and output of materials in the collection and treatment tank 7 can be precisely controlled by the control valves to ensure the high efficiency and safety of the exhaust gas treatment.

[0031] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0032] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A device for collecting and treating tail gas from an acyl chloride reaction, comprising a collection and treatment tank (7), an upper pipe (8), and a lower pipe (9), wherein the upper ends of a plurality of collection and treatment tanks (7) are connected by an upper pipe (8), and the lower ends of a plurality of collection and treatment tanks (7) are connected by a lower pipe (9), characterized in that: Multiple collection and treatment tanks (7) are connected by connecting pipes (10). Each connecting pipe (10) is equipped with an electrically controlled valve (11). Each collection and treatment tank (7) has an upper side pipe (12) and a lower side pipe (13) on its upper and lower sides. Multiple upper side pipes (12) and lower side pipes (13) are connected by pipes and the treatment agent is input through the upper side pipes (12) and lower side pipes (13). The outermost collection and treatment tank (7) is connected to a filter cylinder (4) via a connecting pipe (6), and an exhaust assembly (3) is installed at the upper end of the filter cylinder (4). One end of the exhaust assembly (3) is connected to a particle dust collection cylinder (1), and the upper end of the particle dust collection cylinder (1) is connected to an air inlet pipe (2). The tail gas of the acyl chlorination reaction is input through the air inlet pipe (2), and dust particles and debris are collected through the particle dust collection cylinder (1) and the filter cylinder (4). The tail gas of the acyl chlorination reaction is then chemically treated through the collection and treatment tank (7).

2. The acyl chloride reaction tail gas collection and treatment device according to claim 1, characterized in that: The lower end of the particle collection cylinder (1) and the filter cylinder (4) is equipped with a discharge port (5). The discharge port (5) is designed in the shape of a frustum. The lower end of the discharge port (5) is connected to a plug through a flange, and a sealing ring is provided at the connection. The upper end of the particle collection cylinder (1) is connected to a sealing cover through a buckle and a hinge. The air inlet pipe (2) is connected to the sealing cover through a flange, and a sealing ring is provided at the connection. A filter bag is installed inside the particle collection cylinder (1).

3. The acyl chloride reaction tail gas collection and treatment device according to claim 2, characterized in that: The exhaust assembly (3) includes an exhaust fan and a filter bag. The filter bag is connected to the upper end of the filter cylinder (4). The exhaust fan is installed at the upper end of the filter cylinder (4) and extracts the gas in the particle collection cylinder (1) and filters it through the filter bag in the filter cylinder (4).

4. The acyl chloride reaction tail gas collection and treatment device according to claim 3, characterized in that: The connecting pipe (6) is connected to the collection and treatment tank (7) through a flange. Multiple collection and treatment tanks (7) are distributed at equal intervals, and a placement seat is provided at the lower end of the collection and treatment tank (7).

5. The acyl chloride reaction tail gas collection and treatment device according to claim 4, characterized in that: Each of the collection and processing tanks (7) has a valve installed on its upper pipe (8) and a valve connected to its lower pipe (9). The input and discharge of materials in the collection and processing tanks (7) are achieved through the valves.

6. The acyl chloride reaction tail gas collection and treatment device according to claim 5, characterized in that: Multiple upper pipes (12) are connected by a main pipe, and multiple lower pipes (13) are connected by a main pipe. A control valve is installed on the main pipe, and different chemical treatment agents are input into the collection and treatment tank (7) through the upper pipes (12) and the lower pipes (13).

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