Safety protection device for inerting oxidation kettle

Abstract

This utility model discloses an inert gas reactor safety protection device, comprising a transfer chamber connected to a nitrogen supply pipeline and a nitrogen purging pipeline. The bottom of the transfer chamber is provided with a connecting pipeline to the reactor. An emergency nitrogen supply pipeline is also provided on the transfer chamber. Several gas transfer tanks are located inside the transfer chamber, and each gas transfer tank is connected to an external exhaust pipeline equipped with a flame arrestor valve. The transfer chamber is equipped with a central control panel. This utility model utilizes three parts—inert gas protection, purging, and emergency supply—and employs multiple functional valves, along with a highly integrated central control panel and online oxygen content detection equipment. It automatically supplies nitrogen for purging based on the internal oxygen content, features multi-module safety self-locking control, and includes an emergency nitrogen supply function during the oxidation process, improving the safety factor and achieving intrinsic safety. The entire system is easy to observe and operate, with a high degree of automation.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and more specifically, it relates to a safety protection device for inertizing an oxidation reactor. Background Technology

[0002] Chemical enterprises handle numerous flammable and explosive chemical reagents during production, making the inertization protection and oxygen content monitoring of reaction vessels particularly crucial. For example, CN202323069469.4 discloses an inert gas protection control system for a high-risk reaction vessel system. A nitrogen self-control valve is mounted on the surface of the reaction vessel via a first bracket, and a nitrogen pipeline is fixedly installed at the output end of the nitrogen self-control valve. Automatic control via a PLC control panel allows for 24 / 7 unattended operation. The oxygen content and internal pressure of the reaction vessel can be flexibly set according to specific reaction process parameters. By controlling the nitrogen self-control valve and vacuum self-control valve, the oxygen content inside the reaction vessel is kept below the set value, completing the nitrogen purging operation. After the purging operation is completed, the system automatically enters the constant pressure nitrogen protection step. In this step, a self-operated back pressure valve is used, and the pressure transmitter inside the reaction vessel is interlocked with the venting self-control valve in the discharge pipe. This maintains a constant nitrogen pressure environment within the reaction vessel, improving the safety of the reaction system.

[0003] The oxidation step in hazardous chemical processes requires close monitoring of the gas phase oxygen content, but current equipment lacks emergency measures and sufficiently stable safety interlocking control, posing significant safety hazards. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a safety protection device for inertizing oxidation kettles, and to solve one or more of the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An inertization safety protection device for an oxidation reactor includes a transfer chamber connected to a nitrogen supply pipeline and a nitrogen purging pipeline. The bottom of the transfer chamber is provided with a connecting pipeline to the reactor. An emergency nitrogen supply pipeline is also provided on the transfer chamber. Several gas transfer tanks are provided inside the transfer chamber. The gas transfer tanks are connected to an external exhaust pipeline with a flame arrestor valve. The transfer chamber is equipped with a central control panel.

[0007] Furthermore, the nitrogen delivery pipeline is provided with a manual valve and a nitrogen sealing valve in sequence in the direction away from the transfer chamber. The manual valve is normally open and can be manually adjusted to open and close. The nitrogen sealing valve is electrically connected to the central control panel.

[0008] Furthermore, the nitrogen purging pipeline is equipped with a self-controlled purging regulating valve and a flow meter, both of which are electrically connected to the central control panel.

[0009] Furthermore, the transfer chamber is also equipped with an online oxygen content detection module and a pressure transmitter module, both of which are electrically connected to the central control panel.

[0010] Furthermore, the ports at both ends of the emergency nitrogen supply pipeline are of the same size, and the two ends of the emergency nitrogen supply pipeline are respectively connected to an external nitrogen pipeline and the transfer chamber. The emergency nitrogen supply pipeline is equipped with a self-controlled interlock valve, which is electrically connected to the central control panel.

[0011] Furthermore, the nitrogen purging pipeline is interlocked with the online oxygen content detection module, and the self-controlled interlocking valve is interlocked with the pressure transmitter module.

[0012] Furthermore, a microporous filter is provided at one end of the gas transfer tank, and fireproof cotton is laid at the port of the microporous filter. The exhaust pipe is equipped with a control valve that is normally closed, and the control valve is electrically connected to the central control panel.

[0013] In summary, this utility model has the following beneficial effects: through three parts—inert gas protection, purging, and emergency supply—and with the help of multiple functional valves, a highly integrated central control panel, and online oxygen content detection equipment, nitrogen is automatically supplied for purging based on the internal oxygen content. Multiple modules are designed for safe self-locking and interconnection. An emergency nitrogen supply function is set up during the oxidation process to improve the safety factor and achieve intrinsic safety. The entire system is easy to observe and operate, and has a high degree of automation. Attached Figure Description

[0014] Figure 1 A schematic diagram of one embodiment of this utility model.

[0015] In the diagram: 1. Nitrogen delivery pipeline; 2. Nitrogen purging pipeline; 3. Transfer chamber; 4. Connecting pipeline; 5. Emergency nitrogen delivery pipeline; 6. Gas transfer tank; 7. Flame arrestor valve; 8. Exhaust pipeline; 9. Central control panel; 10. Manual valve; 11. Nitrogen sealing valve; 12. Self-controlled purging regulating valve; 13. Flow meter; 14. Online oxygen content detection module; 15. Pressure transmitter module; 16. Self-controlled interlocking valve; 17. Microporous filter. Detailed Implementation

[0016] Example:

[0017] The following is in conjunction with the appendix Figure 1 The present invention will be described in further detail below.

[0018] An inertization safety protection device for an oxidation reactor, such as Figure 1 As shown, the main body consists of a transfer chamber 3 connected to the reactor via a flange at the end of pipeline 4. A nitrogen delivery pipeline 1, a nitrogen purging pipeline 2, and an emergency nitrogen supply pipeline 5 are installed on the transfer chamber 3. The materials of the main components are selected according to the operating conditions; stainless steel can be used if corrosion resistance is not required. Nitrogen is not the only gas choice; it represents an inert gas. The transfer chamber 3 is equipped with a dedicated central control panel 9, a pressure transmitter module 15, and an online oxygen content detection module 14. The online oxygen content detection module 14 performs individual real-time detection of oxygen extracted from the reactor within the transfer chamber 3. The pressure transmitter module 15 monitors and adjusts the internal pressure. The central control panel 9 serves as the human-machine interface, displaying and sending various numerical values ​​and manual intervention commands to relevant electrical equipment. The central control panel 9 is electrically connected to the online oxygen content detection module 14, the pressure transmitter module 15, the nitrogen sealing valve 11 of the nitrogen delivery pipeline 1, the self-controlled purging regulating valve 12 and flow meter 13 of the nitrogen purging pipeline 2, the self-controlled interlock valve 16 of the emergency nitrogen supply pipeline 5, and the control valve of the exhaust pipeline 8 on the gas transfer tank 6 for integrated management and control. The central control panel 9 displays parameters such as online oxygen content, nitrogen inlet pressure, reactor pressure, and nitrogen flow rate, and includes, but is not limited to, one-button inertization, automatic nitrogen purging, and one-button start buttons for emergency nitrogen supply.

[0019] The nitrogen delivery pipeline 1 is equipped with a nitrogen sealing valve 11 and a manual valve 10 sequentially along the route of supplying nitrogen to the transfer chamber 3. The manual valve 10 is a normally open manual valve, and the nitrogen valve needs to be used in conjunction with the reactor's own discharge pipeline and the corresponding flame arrestor valve. The nitrogen sealing valve 11 is used for nitrogen regulation and management. The manual valve 10 is a backup in case of emergency and is a reserved component. The nitrogen delivery pipeline transfers nitrogen through the transfer chamber 3 before sending it into the reactor. The nitrogen purging pipeline 2 is equipped with a self-controlled purging regulating valve 12 and a flow meter 13, and their installation order is not limited. The self-controlled purging regulating valve 12 controls the nitrogen purging function. The nitrogen purging regulating valve is interlocked with the online oxygen content monitoring module 14: nitrogen purging starts when the oxygen content is 5 vol% higher than the set value; purging stops when it is 1 vol% lower than the set value. The nitrogen purging regulating valve is also used in conjunction with the reactor's vacuum system to achieve negative pressure nitrogen replacement. Flammable and explosive materials can only be added to the reactor when the oxygen content reaches the required 5 vol%. The two ports of the emergency nitrogen supply line 5 are of the same size. One end is connected to the external nitrogen supply line, and the other end is connected to the transfer chamber 3. The emergency nitrogen supply line 5 is equipped with a self-control interlock valve 16, which is interlocked with the pressure transmitter module 15. If the pressure value is too high, nitrogen will not be supplied in an emergency to avoid accelerating the explosion due to excessive pressure.

[0020] The transfer chamber 3 is equipped with at least two gas transfer tanks 6. A microporous filter 17 is installed on one inward side of each gas transfer tank 6. The microporous filter 17 is located inside the transfer chamber 3, and its port is fitted with matching fireproof cotton for sealing. The fireproof cotton allows gas to pass through, providing both fire resistance and filtration. The microporous filter 17 restricts the gas flow rate and excludes particles of a certain size from the gas filter tank. The other end of the gas transfer tank 6 extends out of the transfer chamber 3 and connects to the exhaust pipe 8. The exhaust pipe 8 is equipped with a control valve, which is generally in a normally closed state. It is also advisable to equip the exhaust pipe 8 with a flame-arresting exhaust valve 7 to prevent the internal fire from overflowing and spreading. The gas transfer tank 6 is designed to provide sufficient capacity for depressurization in case the emergency nitrogen supply pipe 5 cannot deliver nitrogen due to excessive internal pressure. Furthermore, it allows for the removal of harmful substances before emergency exhaust, further depressurization, and, under controlled conditions of fire suppression and gas contamination, facilitates safe and efficient emergency nitrogen delivery. The entire protection device is used in conjunction with the reactor to achieve multiple safety measures such as nitrogen sealing, nitrogen protection, nitrogen purging, and emergency nitrogen supply. The relevant valves and key components are interconnected, resulting in a higher degree of automation.

[0021] It should be noted that this specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An oxidation reactor inertization safety protection device, characterized in that: The intermediate chamber (3) includes a nitrogen delivery pipeline (1) and a nitrogen purging pipeline (2). The bottom of the intermediate chamber (3) is provided with a connecting pipeline (4) that connects to the reactor. An emergency nitrogen delivery pipeline (5) is also provided on the intermediate chamber (3). Several gas transfer tanks (6) are provided inside the intermediate chamber (3). The gas transfer tanks (6) are connected to an external exhaust pipeline (8) with a flame arrestor valve (7). The intermediate chamber (3) is equipped with a central control panel (9). The nitrogen delivery pipeline (1) is provided with a manual valve (10) and a nitrogen sealing valve (11) in sequence in the direction away from the transfer chamber (3). The manual valve (10) is normally open and can be manually adjusted to open and close. The nitrogen sealing valve (11) is electrically connected to the central control panel (9). The transfer chamber (3) is also equipped with an online oxygen content detection module (14) and a pressure transmitter module (15), both of which are electrically connected to the central control panel (9). The ports at both ends of the emergency nitrogen supply pipeline (5) are the same size. The two ends of the emergency nitrogen supply pipeline (5) are respectively connected to the external nitrogen pipeline and the transfer chamber (3). The emergency nitrogen supply pipeline (5) is equipped with a self-controlled interlock valve (16), which is electrically connected to the central control panel (9). The nitrogen purging pipeline (2) is interlocked with the online oxygen content detection module (14), and the self-controlled interlocking valve (16) is interlocked with the pressure transmitter module (15). One end of the gas transfer tank (6) is provided with a microporous filter (17), the microporous filter (17) is located inside the transfer chamber (3), and the port of the microporous filter (17) is provided with fireproof cotton that matches the seal. The other end of the gas transfer tank (6) extends out of the transfer chamber (3) and connects to the exhaust pipe (8). The exhaust pipe (8) is equipped with a control valve and is normally closed. The control valve is electrically connected to the central control panel (9).

2. The inertization safety protection device for the oxidation reactor according to claim 1, characterized in that: The nitrogen purging pipeline (2) is equipped with a self-controlled purging regulating valve (12) and a flow meter (13), and both the self-controlled purging regulating valve (12) and the flow meter (13) are electrically connected to the central control panel (9).

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