Auxiliary stabilizing device for a blowdown tower

Abstract

This application discloses an auxiliary stabilization device for a venting tower, including an acidic water pipeline, an acidic water spray gun, and an oil and gas pipeline at the top of the coke tower. An acidic water spray gun is installed at the end of the acidic water pipeline, within the pipe section before the oil and gas pipeline from the top of the coke tower enters the venting tower. The oil and gas pipeline from the top of the coke tower is connected to the feed inlet of the venting tower, and a spraying device is installed inside the venting tower. This application effectively reduces the heat load of the venting tower by injecting acidic water into the pipe section before the feed inlet of the venting tower to pre-cool the high-temperature oil and gas from the coke tower. This makes the temperature control at the top of the tower more stable and reliable, preventing excessively high temperatures from carrying heavy components to the top of the tower and into the air cooler, where they adhere to the pipe wall, causing coking and blockage. This extends the service life of the equipment and reduces maintenance costs.

Description

Technical Field

[0001] This application relates to the field of sludge recycling technology, specifically an auxiliary stabilization device for a venting tower. Background Technology

[0002] Traditional delayed coking units employ intermittent venting systems. Their primary function is to process the high-temperature steam generated during the large-volume blowing and water supply phases of the coke tower during the cooling process using closed-loop in-tower contact cooling technology, and to recover some of the oil and gas carried by this steam. During the coking process and the decoking process after cooling, the venting system is idle, causing the internal temperature of the venting tower to gradually decrease. When the coke tower re-enters the cooling process, a large amount of high-temperature steam suddenly enters the venting tower, causing the condensate accumulated at the bottom to boil rapidly. This results in cavitation of the bottom pump and interruption of the top reflux, affecting the stable operation of the venting tower.

[0003] The large amount of heat energy brought by the high-temperature steam increases the heat load of the venting tower, making it difficult to precisely control the tower top temperature. Excessively high tower top temperature causes heavy components that should condense and descend to evaporate to the top of the tower and enter the air cooler, where they adhere to the tube walls to form coke, further reducing heat exchange efficiency and potentially causing blockage of the air cooler. Summary of the Invention

[0004] The technical problem to be solved by this application is to overcome the existing defects and provide an auxiliary stabilization device for venting towers, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: an auxiliary stabilization device for a venting tower, comprising an acidic water pipeline, an oil and gas pipeline at the top of the coke tower, and an acidic water spray gun. The acidic water spray gun is installed at the end of the acidic water pipeline and is installed in the pipe section before the inlet of the venting tower feed line. The oil and gas pipeline from the top of the coke tower is connected to the feed inlet of the venting tower, and a spraying device is installed inside the venting tower.

[0006] As a preferred technical solution of this application, an automatic flow regulation loop is provided upstream of the acid water spray gun on the acid water pipeline. The regulation loop consists of a flow regulation valve group, a flow transmitter, and a flow indicator regulator. A second temperature transmitter and a second temperature indicator regulator are provided at the feed inlet of the oil and gas line from the top of the coke tower near the vent tower. Together with the above-mentioned automatic flow regulation loop, they form a cascade regulation system for the feed temperature of the vent tower.

[0007] As a preferred technical solution of this application, it also includes an automatic temperature control system, which is installed at the top vapor phase line of the venting tower. The automatic control system includes a first temperature transmitter and a first temperature indicating controller.

[0008] As a preferred technical solution of this application, the acidic water spray gun is a device that can be quickly assembled and disassembled online.

[0009] Compared with existing technologies, this application pre-cools the high-temperature oil and gas from the coking tower by injecting acidic water into the pipe section before the inlet of the venting tower feed line. This effectively reduces the heat load of the venting tower, making the temperature control at the top of the tower more stable and reliable. It also prevents excessively high temperatures from carrying heavy components to the top of the tower and into the air cooler, where they adhere to the pipe wall, causing coking and blockage. This extends the service life of the equipment and reduces maintenance costs. Furthermore, this application uses an online, quick-disassembly and assembly / disassembly of the acidic water spray gun, ensuring that the medium in the pipeline will not leak due to disassembly / assembly of the spray gun, improving operation and maintenance efficiency, and ensuring the continuity and safety of the pipeline filling and cleaning process. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this application.

[0011] In the diagram: 1. Acidic water pipeline, 2. Coke tower top oil and gas pipeline, 3. Acidic water spray gun, 4. Flow indicator and regulator, 5. Flow transmitter, 6. Flow regulating valve group, 7. First temperature transmitter, 8. First temperature indicator and regulator, 9. Second temperature transmitter, 10. Second temperature indicator and regulator, 11. Venting tower, 12. Air cooler, 13. Spraying device. Detailed Implementation

[0012] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0013] Please see Figure 1 This application provides a technical solution: an auxiliary stabilization device for a venting tower, including an acidic water pipeline 1, a coke tower top oil and gas line 2, and an acidic water spray gun 3. The acidic water pipeline 1 is equipped with an acidic water spray gun 3 at its end, and the acidic water spray gun 3 is installed in the pipe section before the inlet of the venting tower feed line. The oil and gas line 2 from the top of the coke tower is connected to the feed inlet of the venting tower 11, and a spraying device 13 is installed inside the venting tower 11.

[0014] By injecting acidic water into the inlet pipe section of the venting tower 11 through the acidic water spray gun 3, the high-temperature oil and gas from the coke tower is cooled down in advance, which effectively reduces the heat load of the venting tower 11, makes the temperature control of the tower top more stable and reliable, and avoids excessively high temperatures from bringing heavy components to the top of the tower and entering the air cooler 12 to adhere to the pipe wall, causing coking and blockage, thereby extending the service life of the equipment and reducing maintenance costs.

[0015] Furthermore, the venting tower 11 is equipped with a feed temperature cascade control system, which consists of a second temperature transmitter 9, a second temperature indicator controller 10, and an automatic flow control loop. The automatic flow control loop includes a flow transmitter 5, a flow indicator controller 4, and a flow control valve group 6. The second temperature indicator controller 10 acts as the main controller, receiving signals from the second temperature transmitter 9. Its output signal serves as the setpoint signal for the secondary controller—the flow indicator controller 4. The output signal of the secondary controller—the flow indicator controller 4—controls the switching action of the flow control valve group 6. These transmitters, indicator controllers, and control valve groups form two closed-loop control loops, namely the main and secondary ones, thereby achieving precise and rapid automatic control of the feed temperature of the venting tower 11.

[0016] Furthermore, the top vapor phase line of the venting tower 11 is equipped with a first temperature transmitter 7 and a first temperature indicator regulator 8. The automatic temperature regulation system composed of the first temperature transmitter 7 and the first temperature indicator regulator 8 is used to automatically regulate the top temperature of the tower to ensure that the top temperature of the tower is within a suitable range.

[0017] Furthermore, the acidic water spray gun 3 is a device that can be quickly assembled and disassembled online.

[0018] The use of online quick-disassembly and assembly of acidic water spray gun 3 ensures that the medium in the pipeline will not leak due to disassembly and assembly of the spray gun, improves operation and maintenance efficiency, and ensures the continuity and safety of pipeline filling and cleaning processes.

[0019] When using the coke tower, when the cooling gas blowing begins, set both the acid water flow indicator regulator 4 and the second temperature indicator regulator 10 to the "manual" position. Manually adjust the opening of the flow regulating valve group 6 so that the temperature indication value of the second temperature indicator regulator 10 is close to 260℃. After the operating conditions stabilize, first switch the flow indicator regulator 4 to automatic. When the temperature indication of the second temperature indicator regulator 10 does not fluctuate much, then switch the second temperature indicator regulator 10 to automatic as well, keeping the tower feed temperature around 260℃.

[0020] While adjusting the feed temperature of the venting tower 11, the gas phase temperature at the top of the tower is stabilized at around 140℃ by the first temperature indicator regulator 8.

[0021] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary stabilizing device for a blowdown tower, characterized by: It includes an acidic water pipeline (1), an oil and gas pipeline (2) at the top of the coke tower, and an acidic water spray gun (3). The acidic water pipeline (1) is equipped with an acidic water spray gun (3) at its end. The acidic water spray gun (3) is installed in the pipe section before the feed line inlet of the vent tower. The oil and gas pipeline (2) from the top of the coke tower is connected to the feed inlet of the vent tower (11). The vent tower (11) is equipped with a spray device (13).

2. An auxiliary stabilizing device for a blowdown tower as defined in claim 1, wherein: An automatic flow regulation loop is provided upstream of the acid water spray gun (3) on the acid water pipeline (1). The regulation loop consists of a flow regulation valve group (6), a flow transmitter (5), and a flow indicator regulator (4). A second temperature transmitter (9) and a second temperature indicator regulator (10) are provided at the feed inlet position of the oil and gas line (2) from the top of the coke tower near the vent tower (11). Together with the above-mentioned automatic flow regulation loop, they form a cascade regulation system for the feed temperature of the vent tower (11).

3. An auxiliary stabilizing device for a blowdown tower as defined in claim 1, wherein: It also includes an automatic temperature control system, which is set at the top gas phase line of the venting tower (11). The automatic temperature control system includes a first temperature transmitter (7) and a first temperature indicator controller (8).

4. An auxiliary stabilizing device for a blowdown tower as defined in claim 1, wherein: The acidic water spray gun (3) is a device that can be quickly assembled and disassembled online.

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