Tank vent gas adsorption treatment system
Patent Information
- Application Number
- CN202522567454.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-03
AI Technical Summary
[0003]本申请旨在至少解决相关技术中，传统油气回收与处理采用吸附、冷凝、膜分离等方法处理废气，但是油气回收与处理设备庞大、投资与运行成本高昂，不适合中小型储罐的专项治理的技术问题
[0005]本申请提供的一种油罐废气吸附处理系统，通过串联吸附、主动引风与智能监控的协同配合，实现了高效净化、安全运行与状态预警的多重功能。在高效吸附净化场景下，系统通过防爆变频引风机主动将储油罐废气引入主油气管线，并使其依次通过两级串联的活性炭吸附箱，极大地延长了废气与吸附剂的接触路径与时间，形成了高效的梯度吸附，确保了挥发性有机物被充分去除，净化后的气体可直接达标排放，有效解决了单一吸附罐易穿透和净化不彻底的问题。在系统安全与稳定运行场景下，通过在引风机上游设置阻火器，从根本上杜绝了回火风险；通过进口与出口阀门的设置，实现了系统的隔离与检修便利；并通过进口与出口压力传感器的协同监测，为风机变频调节提供依据，使系统风量能够自适应废气产生状况，维持高效稳定运行。在状态监控与预警场景下，监控机构通过在每个活性炭吸附箱内部集成压差传感器与温度传感器，实时感知吸附箱的阻力变化与温升情况。当压差达到预设阈值时，系统判定吸附箱趋于饱和并发出更换预警，避免了污染物穿透；当温度异常升高时，系统能自动降频或停机并报警，预防了活性炭床层的安全风险。同时，吸附箱内部模块化的活性炭更换盒设计，使得维护操作更为简便快捷。
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Figure CN224912074U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of waste gas treatment technology, and more specifically, to an adsorption treatment system for oil tank waste gas. Background Technology
[0002] Currently, existing oil storage tanks, especially those in power plant fuel pump rooms, are generally designed with breather valves that directly connect them to the atmosphere. The diesel fuel and other media stored in these tanks are flammable and volatile. The volatilized oil vapors, directly released into the atmosphere, react with other pollutants in the environment to form secondary pollutants such as ozone and fine particulate matter, posing a threat to human health and the ecological environment, and creating fire and explosion hazards, thus failing to meet increasingly stringent environmental regulations. To address this issue, various oil and gas recovery and treatment solutions have emerged, such as adsorption, condensation, and membrane separation. However, these existing solutions still have significant limitations: complex multi-stage systems involving condensation and catalytic combustion, while thorough, are bulky, have high investment and operating costs, and are unsuitable for the specialized treatment of small and medium-sized storage tanks; while simple single adsorption tank devices suffer from limited adsorption capacity, easy penetration, short replacement cycles, inability to cope with fluctuations in exhaust gas concentration, and a lack of effective safety monitoring and early warning mechanisms. Furthermore, most existing devices focus on the recovery and reuse of oil and gas rather than being optimized for direct purification and emission scenarios, resulting in redundant system configurations. Therefore, there is an urgent need for an adsorption treatment system that is compact, has high adsorption efficiency, is safe and controllable in operation, and is specifically designed for the purification and emission needs of exhaust gas from oil storage tanks, so as to achieve reliable, economical and efficient environmental governance. Utility Model Content
[0003] This application aims to at least address the technical problem that traditional oil and gas recovery and treatment methods, such as adsorption, condensation, and membrane separation, are used to treat waste gas, but the oil and gas recovery and treatment equipment is large, and the investment and operating costs are high, making it unsuitable for the special treatment of small and medium-sized storage tanks.
[0004] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides an oil tank exhaust gas adsorption treatment system, comprising: a main oil and gas pipeline, the inlet of which is connected to the outlet pipeline of the oil storage tank; an explosion-proof variable frequency induced draft fan installed on the main oil and gas pipeline for actively introducing exhaust gas generated by the oil storage tank into the system; a flame arrester installed on the main oil and gas pipeline and located upstream of the inlet direction of the explosion-proof variable frequency induced draft fan; a first activated carbon adsorption box and a second activated carbon adsorption box, the inlet of the first activated carbon adsorption box being connected to the main oil and gas pipeline, and the outlet of the first activated carbon adsorption box being connected to the second activated carbon adsorption box. The air inlets of the adsorption boxes are connected in series, so that the waste gas flows through the first activated carbon adsorption box and the second activated carbon adsorption box in sequence for two-stage adsorption treatment; there are inlet pressure sensors and outlet pressure sensors, with the inlet pressure sensor set at the air inlet end of the first activated carbon adsorption box and the outlet pressure sensor set at the air outlet end of the second activated carbon adsorption box; there are inlet valves and outlet valves, with the inlet valve set at the air inlet end of the first activated carbon adsorption box and the outlet valve set at the air outlet end of the second activated carbon adsorption box, wherein the inlet valve and the outlet valve are manual butterfly valves.
[0005] This application provides an oil tank exhaust gas adsorption treatment system that achieves multiple functions—high-efficiency purification, safe operation, and status early warning—through the coordinated operation of series adsorption, active drafting, and intelligent monitoring. In the high-efficiency adsorption purification scenario, the system actively introduces the exhaust gas from the oil storage tank into the main oil and gas pipeline via an explosion-proof variable frequency draft fan. The gas then passes sequentially through two stages of activated carbon adsorption boxes connected in series, significantly extending the contact path and time between the exhaust gas and the adsorbent. This forms a highly efficient gradient adsorption, ensuring that volatile organic compounds are fully removed. The purified gas can be directly discharged in compliance with standards, effectively solving the problems of easy penetration and incomplete purification in single adsorption tanks. In the system safety and stable operation scenario, a flame arrester is installed upstream of the draft fan to fundamentally eliminate the risk of backfire. The inlet and outlet valves provide system isolation and convenient maintenance. Furthermore, the coordinated monitoring by inlet and outlet pressure sensors provides a basis for the variable frequency adjustment of the fan, enabling the system airflow to adapt to the exhaust gas generation conditions and maintain efficient and stable operation. In the status monitoring and early warning scenario, the monitoring agency integrates differential pressure and temperature sensors inside each activated carbon adsorption box to detect changes in resistance and temperature rise in the adsorption box in real time. When the differential pressure reaches a preset threshold, the system determines that the adsorption box is approaching saturation and issues a replacement warning to prevent pollutants from penetrating. When the temperature rises abnormally, the system can automatically reduce the frequency or stop the machine and issue an alarm to prevent safety risks to the activated carbon bed. At the same time, the modular activated carbon replacement box design inside the adsorption box makes maintenance operations simpler and faster.
[0006] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0007] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is one of the structural schematic diagrams of a fuel pump room storage tank system according to an embodiment of this application; Figure 2 This is a second schematic diagram of the structure of a fuel pump room storage tank system according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of an oil tank exhaust gas adsorption treatment system according to an embodiment of this application.
[0008] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 Oil tank exhaust gas adsorption treatment system, 110 Main oil and gas pipeline, 120 Explosion-proof variable frequency induced draft fan, 130 Flame arrester, 140 First activated carbon adsorption box, 150 Second activated carbon adsorption box, 160 Inlet pressure sensor, 170 Outlet pressure sensor, 180 Inlet valve, 190 Outlet valve, 192 Differential pressure sensor, 194 Temperature sensor, 196 Activated carbon replacement box, 198 Control system, 199 Alarm, 200 Oil storage tank. Detailed Implementation
[0009] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0010] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0011] The following reference Figures 1 to 3 This application describes an oil tank exhaust gas adsorption treatment system 100 provided according to some embodiments of the present application.
[0012] According to the first aspect of this application, Figure 1 , Figure 2 and Figure 3As shown in the figure, an embodiment of this application provides an oil tank exhaust gas adsorption treatment system 100, including: a main oil and gas pipeline 110, the inlet of which is connected to the outlet pipeline of an oil storage tank 200; an explosion-proof variable frequency induced draft fan 120, installed on the main oil and gas pipeline 110, for actively introducing exhaust gas generated by the oil storage tank 200 into the system; a flame arrester 130, installed on the main oil and gas pipeline 110 and located upstream of the inlet direction of the explosion-proof variable frequency induced draft fan 120; a first activated carbon adsorption box 140 and a second activated carbon adsorption box 150, the inlet of the first activated carbon adsorption box 140 being connected to the main oil and gas pipeline 110, and the outlet of the first activated carbon adsorption box 140 being connected to the second activated carbon adsorption box 150. The air inlets of the activated carbon adsorption boxes 150 are connected in series, allowing the waste gas to flow sequentially through the first activated carbon adsorption box 140 and the second activated carbon adsorption box 150 for two-stage adsorption treatment. An inlet pressure sensor 160 and an outlet pressure sensor 170 are present; the inlet pressure sensor 160 is located at the air inlet of the first activated carbon adsorption box 140, and the outlet pressure sensor 170 is located at the air outlet of the second activated carbon adsorption box 150. An inlet valve 180 and an outlet valve 190 are present; the inlet valve 180 is located at the air inlet of the first activated carbon adsorption box 140, and the outlet valve 190 is located at the air outlet of the second activated carbon adsorption box 150. Both the inlet valve 180 and the outlet valve 190 are manual butterfly valves.
[0013] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the oil tank exhaust gas adsorption treatment system 100 provided in the embodiments of this application includes: a main oil and gas pipeline 110, an explosion-proof variable frequency induced draft fan 120, a flame arrester 130, a first activated carbon adsorption box 140 and a second activated carbon adsorption box 150, an inlet pressure sensor 160 and an outlet pressure sensor 170, an inlet valve 180 and an outlet valve 190. The inlet end of the main oil and gas pipeline 110 is used to connect to the outlet pipeline of the oil storage tank 200; the explosion-proof variable frequency induced draft fan 120 is installed on the main oil and gas pipeline 110 to actively introduce the exhaust gas generated by the oil storage tank 200 into the system; the flame arrester 130 is installed on the main oil and gas pipeline 110 and is located upstream of the inlet direction of the explosion-proof variable frequency induced draft fan 120; the inlet of the first activated carbon adsorption box 140 is connected to the main oil and gas pipeline 110, and the outlet of the first activated carbon adsorption box 140 is connected in series with the inlet of the second activated carbon adsorption box 150. The system is interconnected, allowing the waste gas to flow sequentially through the first activated carbon adsorption box 140 and the second activated carbon adsorption box 150 for two-stage adsorption treatment. An inlet pressure sensor 160 is located at the inlet end of the first activated carbon adsorption box 140, and an outlet pressure sensor 170 is located at the outlet end of the second activated carbon adsorption box 150. An inlet valve 180 is located at the inlet end of the first activated carbon adsorption box 140, and an outlet valve 190 is located at the outlet end of the second activated carbon adsorption box 150. Both the inlet valve 180 and the outlet valve 190 are manual butterfly valves.
[0014] Thus, through the coordinated operation of the aforementioned components, the oil tank exhaust gas adsorption treatment system 100 constitutes a complete, efficient, and controllable exhaust gas purification process. The explosion-proof variable frequency induced draft fan 120, as the core power source of the system, overcomes the passivity of traditional reliance on the tank's own pressure for emission, realizing the active introduction and transportation of exhaust gas. The flame arrester 130, as the primary safety barrier, effectively eliminates the risk of backfire and explosion. The two-stage series activated carbon adsorption boxes constitute the core purification unit, ensuring sufficient contact between exhaust gas and activated carbon by extending the adsorption path and forming an adsorption gradient, thereby improving the removal efficiency of volatile organic compounds. The linkage between the inlet pressure sensor 160, the outlet pressure sensor 170, and the explosion-proof variable frequency induced draft fan 120 constitutes the system's feedback regulation center, adjusting the air volume in real time by monitoring pressure changes, ensuring stable operation and energy-saving effects of the system under different operating conditions. The inlet valve 180 and the outlet valve 190 provide operational convenience and safety assurance for the start-up, shutdown, isolation, and maintenance of this system.
[0015] Compared with existing technologies, the oil tank exhaust gas adsorption treatment system 100 provided in this application has the following advantages: First, high purification efficiency. The two-stage series adsorption design greatly improves the utilization rate of activated carbon and the exhaust gas purification effect, ensuring that the emitted gas meets the standards. Second, safe and reliable operation. The integrated flame arrester 130 and pressure monitoring effectively prevent safety risks such as explosion and overload. Third, strong adaptability. Through the cooperation of variable frequency induced draft fan and pressure sensor, the system can automatically adapt to fluctuations in exhaust gas generation, maintain efficient and stable operation, and reduce energy consumption. Fourth, convenient operation and maintenance. The reasonable valve settings and modular structure make system start-up, shutdown, maintenance, and activated carbon replacement simple and easy.
[0016] Specifically, existing oil storage tanks, especially those in power plant fuel pump rooms, are generally designed with breather valves that directly connect them to the atmosphere. The diesel fuel and other media stored in these tanks are flammable and volatile. The volatilized oil vapors, directly released into the atmosphere, react with other pollutants in the environment to form secondary pollutants such as ozone and fine particulate matter, posing a threat to human health and the ecological environment, and creating fire and explosion hazards, thus failing to meet increasingly stringent environmental regulations. To address this problem, various oil and gas recovery and treatment solutions have emerged in existing technologies, such as adsorption, condensation, and membrane separation. However, these existing solutions still have significant limitations: complex multi-stage systems involving condensation and catalytic combustion, while thorough, are bulky, have high investment and operating costs, and are unsuitable for the specialized treatment of small and medium-sized storage tanks; while simple single adsorption tank devices suffer from limited adsorption capacity, easy penetration, short replacement cycles, inability to cope with fluctuations in exhaust gas concentration, and a lack of effective safety monitoring and early warning mechanisms. Furthermore, most existing devices focus on the recovery and reuse of oil and gas rather than being optimized for direct purification and emission scenarios, resulting in redundant system configurations. Therefore, there is an urgent need for an adsorption treatment system that is compact, has high adsorption efficiency, is safe and controllable in operation, and is specifically designed for the purification and emission needs of exhaust gas from oil storage tanks, so as to achieve reliable, economical and efficient environmental governance.
[0017] To address the shortcomings of existing technologies, such as Figure 1 and Figure 3As shown, the oil tank exhaust gas adsorption treatment system 100 provided in this application achieves multiple functions such as high-efficiency purification, safe operation, and status early warning through the coordinated operation of series adsorption, active draft fan, and intelligent monitoring. In the high-efficiency adsorption purification scenario, the system actively introduces the exhaust gas from the oil storage tank 200 into the main oil and gas pipeline 110 via an explosion-proof variable frequency draft fan 120, allowing it to pass sequentially through two stages of series activated carbon adsorption boxes. This significantly extends the contact path and time between the exhaust gas and the adsorbent, forming a highly efficient gradient adsorption that ensures the complete removal of volatile organic compounds. The purified gas can be directly discharged in compliance with standards, effectively solving the problems of easy penetration and incomplete purification in a single adsorption tank. In the system safety and stable operation scenario, a flame arrester 130 is installed upstream of the draft fan, fundamentally eliminating the risk of backfire. The system achieves isolation and convenient maintenance through the installation of inlet valve 180 and outlet valve 190. The coordinated monitoring by inlet pressure sensor 160 and outlet pressure sensor 170 provides a basis for the frequency conversion adjustment of the fan, enabling the system airflow to adapt to the exhaust gas generation conditions and maintain efficient and stable operation. In status monitoring and early warning scenarios, the monitoring mechanism integrates differential pressure sensor 192 and temperature sensor 194 inside each activated carbon adsorption box to detect changes in resistance and temperature rise in the adsorption box in real time. When the differential pressure reaches a preset threshold, the system determines that the adsorption box is approaching saturation and issues a replacement warning to prevent pollutant penetration. When the temperature rises abnormally, the system can automatically reduce the frequency or stop the machine and issue an alarm, preventing safety risks to the activated carbon bed. Meanwhile, the modular activated carbon replacement box 196 inside the adsorption box makes maintenance operations simpler and faster.
[0018] In some embodiments, optionally, such as Figure 3 As shown, both the first activated carbon adsorption box 140 and the second activated carbon adsorption box 150 are equipped with a differential pressure sensor 192, which is used to monitor the pressure difference between the inlet and outlet ends of their respective activated carbon adsorption boxes.
[0019] Specifically, such as Figure 3As shown, the differential pressure sensor 192 monitors the pressure loss generated when airflow passes through the activated carbon packing layer in real time through two pressure taps connected to the inlet and outlet chambers of the activated carbon adsorption box, respectively. When activated carbon adsorbs a large amount of oil and gas pollutants, its internal pores are occupied, resulting in narrowing of the airflow channel and increased flow resistance. This change is directly reflected in a significant increase in the inlet and outlet pressure difference. By continuously monitoring this differential pressure data, the current adsorption load and saturation state of the activated carbon can be indirectly and accurately assessed. In this way, the system compares the real-time differential pressure value monitored by the differential pressure sensor 192 with the preset safety threshold to achieve online diagnosis and early warning of the adsorption box's working status. This design allows operators to accurately grasp the optimal time for activated carbon replacement or regeneration, fundamentally avoiding pollutant penetration and excessive emissions caused by activated carbon saturation and failure. It also prevents overload of the blower due to excessive resistance, realizing an upgrade from "regular blind replacement" to "precise maintenance on demand," improving the system's operational reliability and economy.
[0020] In some embodiments, optionally, such as Figure 3 As shown, both the first activated carbon adsorption box 140 and the second activated carbon adsorption box 150 are equipped with a temperature sensor 194 to monitor the working temperature inside their respective activated carbon adsorption boxes.
[0021] Specifically, such as Figure 3 As shown, temperature sensor 194 is installed in the packing layer inside the activated carbon adsorption box. Its probe directly contacts the activated carbon bed or is placed in the airflow channel to monitor temperature changes in real time during the adsorption process. Since the physical adsorption process itself releases adsorption heat, the bed temperature rises. Moreover, when treating high concentrations of volatile organic compounds, abnormal temperature rises may indicate unsafe conditions such as oxidation reactions within the activated carbon bed. Therefore, temperature is a key parameter reflecting the safety and stability of the adsorption process. By continuously monitoring the internal operating temperature of the activated carbon adsorption box with temperature sensor 194 and comparing it with a preset safe temperature threshold, the system can promptly detect abnormal temperature rises. Once the temperature reaches or exceeds the threshold, the control system can immediately activate interlocking protection mechanisms, such as automatically reducing the induced draft fan speed to decrease the amount of waste gas input, or directly shutting down the system and issuing an audible and visual alarm. This effectively prevents fire risks that may be caused by the accumulation of adsorption heat or unexpected reactions, ensuring the safety of equipment and personnel, and achieving safe and controllable adsorption process.
[0022] In some embodiments, optionally, such as Figure 3 As shown, both the first activated carbon adsorption box 140 and the second activated carbon adsorption box 150 are equipped with multiple pull-out activated carbon replacement boxes 196 for holding activated carbon packing.
[0023] Specifically, such as Figure 3As shown, the activated carbon replacement box 196 is an independent, sealed drawer-type structure, which can be pulled out and installed inside the adsorption box via guide rails located on the side wall or top of the adsorption box. The inlet and outlet surfaces of each replacement box feature a perforated plate design, ensuring uniform penetration of waste gas through the bed while accommodating sufficient activated carbon packing. The modular design divides the large adsorbent bed into multiple standard units, allowing maintenance operations to be performed on specific saturated units without needing to treat the entire adsorption box. When the differential pressure sensor 192 issues a warning or when activated carbon replacement is required according to the maintenance plan, the operator can simply close the inlet and outlet valves 190 of a single adsorption box to isolate it from the system, then directly pull out the designated saturated replacement box and push in a spare box pre-filled with fresh activated carbon. This design enables modularization of activated carbon filling and factory-based replacement, transforming the originally arduous, time-consuming, and uncertain on-site replacement work into a fast, simple, and clean standard process. This greatly shortens system downtime for maintenance, reduces labor intensity and labor costs, and avoids the flying and scattering of activated carbon dust during replacement, maintaining a clean working environment.
[0024] In some embodiments, optionally, such as Figure 3 As shown, the flame arrester 130, the inlet pressure sensor 160, and the explosion-proof variable frequency induced draft fan 120 are sequentially arranged on the main oil and gas pipeline 110 along the direction of exhaust gas flow.
[0025] Specifically, such as Figure 3 As shown, the flame arrester 130, inlet pressure sensor 160, and explosion-proof variable frequency induced draft fan 120 are arranged in series along the exhaust gas flow direction on the main oil and gas pipeline 110. The flame arrester 130 serves as the first line of defense in the system, eliminating the risk of potential ignition sources carried in the exhaust gas. After being flame-arrested, the exhaust gas then flows through the inlet pressure sensor 160, which accurately collects the original signal closest to the actual exhaled pressure of the storage tank before the airflow is disturbed by the fan. The explosion-proof variable frequency induced draft fan 120, as the power source, is placed at the end, precisely adjusting its speed based on the preceding pressure signal to achieve closed-loop control of the system flow. In this way, the close proximity and fixed sequence of the three components ensure the priority of safety protection, the accuracy of pressure monitoring, and the efficiency of power regulation. This design not only minimizes the safety threat of backfire to downstream equipment and pipelines but also provides a stable and accurate control basis for the variable frequency induced draft fan, enabling it to quickly respond to changes in tank pressure and accurately control the amount of exhaust gas extracted.
[0026] In some embodiments, optionally, such as Figure 1 and Figure 2As shown, it also includes a control system 198, which is electrically connected to an inlet pressure sensor 160, an outlet pressure sensor 170, and an explosion-proof variable frequency induced draft fan 120. The control system 198 is configured to adjust the speed of the explosion-proof variable frequency induced draft fan 120 according to the inlet pressure value monitored by the inlet pressure sensor 160.
[0027] Specifically, such as Figure 1 and Figure 3 As shown, the oil tank exhaust gas adsorption treatment system 100 also includes a control system 198. The control system 198 establishes communication with the inlet pressure sensor 160 and the outlet pressure sensor 170 via signal cables to collect pressure data in real time. Simultaneously, it is connected to the explosion-proof variable frequency induced draft fan 120 via a power cable or a dedicated variable frequency interface, forming a complete closed-loop control circuit. This is because the inlet pressure value directly reflects the dynamic balance between the exhaust pressure of the oil storage tank 200 and the suction force of the fan. When the inlet pressure deviates from the preset optimal operating range, it means that the exhaust gas flow rate is mismatched. Therefore, the inlet pressure sensor 160 continuously monitors the pressure value at the inlet of the first activated carbon adsorption box 140. This pressure value reflects the balance between the oil storage tank's exhalation pressure and the system's suction capacity. The control system 198 compares the measured pressure value with the preset target pressure range in real time and dynamically adjusts the operating frequency of the explosion-proof variable frequency induced draft fan 120 based on the comparison results: increasing the speed to enhance suction when the pressure is too low, and decreasing the speed when the pressure is too high, thereby stabilizing the system inlet pressure within the optimal range and achieving adaptive flow control. This not only ensures smooth start-up and efficient purification of the exhaust gas treatment process, but also, through the intelligent linkage between the fan speed and the tank pressure, enables the system to automatically adapt to changes in the oil storage tank's breathing intensity. While ensuring the best treatment effect, it effectively avoids energy waste or impact on the tank structure caused by excessive suction, prevents exhaust gas accumulation due to insufficient suction, and improves treatment efficiency.
[0028] In some embodiments, optionally, such as Figure 1 As shown, the control system 198 is also electrically connected to the differential pressure sensor 192; the control system 198 is also configured to: determine the adsorption saturation state of the corresponding activated carbon adsorption box based on the differential pressure value monitored by the differential pressure sensor 192; when the differential pressure value reaches or exceeds a first preset threshold, determine that the activated carbon adsorption box is approaching saturation.
[0029] Specifically, such as Figure 1As shown, the control system 198 establishes an electrical connection with the differential pressure sensor 192 installed inside the first activated carbon adsorption box 140 and the second activated carbon adsorption box 150 through a signal acquisition module, continuously acquiring real-time differential pressure data at the inlet and outlet of each adsorption box. Because the clean activated carbon bed has unobstructed pores and low airflow resistance, it exhibits a stable low differential pressure. As the adsorption process continues, the micropores of the activated carbon are gradually filled by oil and gas molecules, reducing the specific surface area, leading to narrowing of the airflow channel and increased flow resistance. This physical change directly manifests as a monotonic increase in the differential pressure value. The rate of change and absolute value of the differential pressure are positively correlated with the adsorption load of the activated carbon. Thus, during continuous system operation, the differential pressure sensor 192 continuously monitors and feeds back the real-time differential pressure value between the inlet and outlet of the first activated carbon adsorption box 140 and the second activated carbon adsorption box 150 to the control system 198. In this way, the control system 198 can achieve online, quantitative diagnosis of the activated carbon adsorption saturation state by comparing the real-time differential pressure data with a preset first threshold (e.g., 2.0 kPa). Once the differential pressure value of a certain adsorption box reaches or exceeds the threshold, the system can automatically determine that the adsorption box is approaching saturation and the adsorption efficiency will decrease significantly. This ensures timely warning before activated carbon fails, avoids excessive emissions caused by pollutant penetration, maximizes the service life of activated carbon, effectively reduces system operation and maintenance costs, and ensures continuous and stable treatment results.
[0030] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, it also includes an alarm 199, which is electrically connected to the control system 198; the control system 198 is further configured to control the alarm 199 to issue an alarm signal when it is determined that any activated carbon adsorption box is approaching saturation.
[0031] Specifically, such as Figure 1As shown, the oil tank exhaust gas adsorption treatment system 100 also includes an alarm 199, which is electrically connected to the control system 198. The control system 198 is further configured to control the alarm 199 to issue an alarm signal when it determines that any activated carbon adsorption box is approaching saturation. Thus, when the control system 198 determines that the pressure difference between the first and second activated carbon adsorption boxes reaches a first preset threshold, it immediately triggers an alarm. By activating the audible and visual alarm installed in the field control cabinet or central control room, acoustic and optical warning signals are emitted; simultaneously, a specific warning information box pops up on the human-machine interface, clearly indicating which adsorption box requires maintenance, thereby timely and accurately conveying maintenance needs to the operators. This effectively avoids the risk of decreased treatment efficiency or excessive emissions due to failure to detect activated carbon saturation in a timely manner, while transforming the traditional fixed-cycle replacement mode into a more scientific and economical on-demand maintenance mode, significantly improving the reliability and economy of system operation, and reducing potential environmental and safety risks caused by untimely maintenance.
[0032] In some embodiments, optionally, such as Figure 1 As shown, the control system 198 is also electrically connected to the temperature sensor 194; the control system 198 is also configured to: monitor the temperature data of the temperature sensor 194 in real time; when the temperature value in any activated carbon adsorption box reaches or exceeds the second preset threshold, control the explosion-proof variable frequency induced draft fan 120 to reduce speed or stop, and trigger an over-temperature alarm.
[0033] Specifically, such as Figure 1 As shown, the control system 198 is also electrically connected to the temperature sensor 194. During system operation, the temperature of each adsorption chamber is continuously monitored by real-time data collected from the temperature sensor 194 located inside the activated carbon adsorption chamber. Since activated carbon releases adsorption heat during oil and gas adsorption, the bed temperature normally rises. However, when the oil and gas concentration is too high or other abnormal conditions exist, the temperature may rise too quickly or be abnormally high, posing a safety hazard. When the control system 198 detects that the temperature in any activated carbon adsorption chamber reaches or exceeds a second preset threshold (e.g., 80°C), it immediately initiates a graded safety response. First, it automatically reduces the operating speed of the explosion-proof variable frequency induced draft fan 120 to reduce the amount of waste gas input and attempt to control the temperature. If the temperature continues to rise and exceeds a higher threshold, an emergency shutdown procedure is executed to completely cut off the waste gas source, and an independent over-temperature audible and visual alarm is triggered. This provides proactive safety protection for the system, effectively preventing the risk of fire caused by abnormal temperature increases, ensuring the safety of equipment and personnel, and achieving safe and controllable operation of the adsorption process.
[0034] In practical applications, the first preset threshold can be set according to the designed adsorption capacity of the activated carbon and the system air pressure, typically within the range of 1.5 kPa to 3.0 kPa. For example, it can be set to 2.0 kPa. When the system detects that the pressure difference value of any activated carbon adsorption box reaches or exceeds 2.0 kPa, the control system 198 determines that the adsorption box is approaching saturation and executes an alarm prompt, reminding the operator to replace or handle the activated carbon in the adsorption box. The second preset threshold is a safety temperature set based on factors such as the safe operating temperature of the activated carbon and the flash point of the light diesel oil being processed, typically within the range of 70℃ to 90℃. For example, it can be set to 80℃. When the control system 198 detects that the temperature value in any activated carbon adsorption box reaches or exceeds 80℃, the control system 198 will immediately activate the safety interlock, first reducing the speed of the explosion-proof variable frequency induced draft fan 120 to reduce the amount of oil and gas entering; if the temperature continues to rise, it will shut down urgently and simultaneously issue an over-temperature alarm signal to ensure system safety.
[0035] In some embodiments, the control system 198 is optionally configured to, when performing fan regulation, increase the speed of the explosion-proof variable frequency induced draft fan 120 when the inlet pressure value is lower than a preset pressure range, and decrease the speed of the explosion-proof variable frequency induced draft fan 120 when the inlet pressure value is higher than the preset pressure range.
[0036] Specifically, the control system 198 continuously collects the real-time pressure value at the system inlet through the inlet pressure sensor 160 and compares it with the preset optimized pressure range. Based on the comparison result, the control system 198 executes closed-loop feedback control. When the inlet pressure value is consistently below the lower limit of the preset range, it indicates that the system's suction capacity is excessive relative to the tank's exhaust pressure. The control system 198 will then increase the operating frequency of the explosion-proof variable frequency induced draft fan 120 according to a preset algorithm to enhance suction and maintain system processing efficiency. Conversely, when the inlet pressure value is consistently above the upper limit of the preset range, it indicates that the system load is too high or the tank's exhaust pressure is too high. The control system 198 will then reduce the fan speed according to a preset algorithm to weaken the suction intensity. This dynamic adjustment method based on real-time pressure feedback allows the system to adaptively match the changes in the breathing intensity of the oil storage tank 200. This ensures that the exhaust gas is collected and treated in a timely and effective manner, avoiding the accumulation of exhaust gas in the tank area. It also prevents energy waste and adverse effects on the tank structure that may result from excessive suction, ultimately achieving stable and energy-saving operation of the system under optimal conditions.
[0037] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0038] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0039] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An oil tank exhaust gas adsorption treatment system, characterized in that, include: The main oil and gas pipeline, the air inlet of which is used to connect to the exhalation pipeline of the oil storage tank; An explosion-proof variable frequency induced draft fan is installed on the main oil and gas pipeline to actively introduce the exhaust gas generated by the oil storage tank into the system; A flame arrester is installed on the main oil and gas pipeline and located upstream of the air intake direction of the explosion-proof variable frequency induced draft fan. The first activated carbon adsorption box and the second activated carbon adsorption box are connected in series. The air inlet of the first activated carbon adsorption box is connected to the main oil and gas pipeline, and the air outlet of the first activated carbon adsorption box is connected in series with the air inlet of the second activated carbon adsorption box, so that the waste gas flows through the first activated carbon adsorption box and the second activated carbon adsorption box in sequence for two-stage adsorption treatment. An inlet pressure sensor and an outlet pressure sensor are provided, wherein the inlet pressure sensor is located at the air inlet end of the first activated carbon adsorption box, and the outlet pressure sensor is located at the air outlet end of the second activated carbon adsorption box. An inlet valve and an outlet valve are provided, wherein the inlet valve is located at the air inlet end of the first activated carbon adsorption box, and the outlet valve is located at the air outlet end of the second activated carbon adsorption box. The inlet valve and the outlet valve are manual butterfly valves.
2. The oil tank exhaust gas adsorption treatment system according to claim 1, characterized in that, Both the first activated carbon adsorption box and the second activated carbon adsorption box are equipped with: Differential pressure sensors are used to monitor the pressure difference between the inlet and outlet ends inside each activated carbon adsorption box.
3. The oil tank exhaust gas adsorption treatment system according to claim 2, characterized in that, Both the first activated carbon adsorption box and the second activated carbon adsorption box are also equipped with: Temperature sensors are used to monitor the operating temperature inside each activated carbon adsorption chamber.
4. The oil tank exhaust gas adsorption treatment system according to claim 1, characterized in that, Both the first activated carbon adsorption box and the second activated carbon adsorption box are equipped with: Multiple pull-out activated carbon replacement boxes are used to hold activated carbon fillers.
5. The oil tank exhaust gas adsorption treatment system according to claim 1, characterized in that, The flame arrester, inlet pressure sensor, and explosion-proof variable frequency induced draft fan are sequentially installed on the main oil and gas pipeline along the direction of exhaust gas flow.
6. The oil tank exhaust gas adsorption treatment system according to claim 3, characterized in that, It also includes a control system, which is electrically connected to the inlet pressure sensor, the outlet pressure sensor and the explosion-proof variable frequency induced draft fan; The control system is configured to adjust the rotational speed of the explosion-proof variable frequency induced draft fan based on the inlet pressure value monitored by the inlet pressure sensor.
7. The oil tank exhaust gas adsorption treatment system according to claim 6, characterized in that, The control system is also electrically connected to the differential pressure sensor; the control system is also configured to: determine the adsorption saturation state of the corresponding activated carbon adsorption box based on the differential pressure value monitored by the differential pressure sensor; when the differential pressure value reaches or exceeds a first preset threshold, determine that the activated carbon adsorption box is approaching saturation.
8. The oil tank exhaust gas adsorption treatment system according to claim 7, characterized in that, It also includes an alarm, which is electrically connected to the control system; The control system is also configured to: when it is determined that any activated carbon adsorption box is approaching saturation, control the alarm to issue an alarm signal.
9. The oil tank exhaust gas adsorption treatment system according to claim 6, characterized in that, The control system is also electrically connected to the temperature sensor; the control system is also configured to: monitor the temperature data of the temperature sensor in real time; when the temperature value in any activated carbon adsorption box reaches or exceeds a second preset threshold, control the explosion-proof variable frequency induced draft fan to reduce speed or stop, and trigger an over-temperature alarm.
10. The oil tank exhaust gas adsorption treatment system according to claim 6, characterized in that, When the control system is configured to perform fan regulation: When the inlet pressure value is lower than the preset pressure range, the rotational speed of the explosion-proof variable frequency induced draft fan is increased; When the inlet pressure value is higher than the preset pressure range, the speed of the explosion-proof variable frequency induced draft fan is reduced.