Oil gas recovery treatment device with adsorption function

Abstract

An oil gas recovery processing device with an adsorption function comprises an oil gas recovery processing pipeline, one end of the oil gas recovery processing pipeline is arranged to be a gas inlet end used for inputting condensed oil gas, the other end of the oil gas recovery processing pipeline is arranged to be a gas outlet end, and the oil gas recovery processing pipeline on the gas inlet end side is communicated with an activated carbon adsorption unit. A catalytic oxidation unit is communicated with the oil gas recovery treatment pipeline on the gas outlet end side; the activated carbon adsorption unit is further communicated with a vacuum analysis pipeline and a vacuum breaking purging pipeline, the vacuum analysis pipeline is sequentially communicated with a vacuum analysis valve, a vacuum pump and a condenser, the other end of the vacuum analysis pipeline is communicated with the air inlet end, and a vacuum breaking purging valve is mounted on the vacuum breaking purging pipeline; and the other end of the vacuum breaking purging pipeline is externally connected with a nitrogen supply pipeline. The oil gas recovery treatment device disclosed by the utility model can be used for carrying out adsorption and catalytic oxidation treatment on loading waste gas of materials such as gasoline, diesel oil and aviation kerosene, and is beneficial to ensuring that the waste gas reaches the standard.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas recovery, in particular to an oil and gas recovery processing device with an adsorption function. Background Art

[0002] At present, for the treatment of exhaust gas during the loading process of loading materials such as gasoline, diesel, jet fuel and vinyl acetate, a three-stage condensation and catalytic oxidation process is generally used to treat the loading exhaust gas to meet emission standards. However, in the actual operation process, since gasoline loading exhaust gas contains a small amount of light hydrocarbons with relatively stable molecular structures such as C3 and C4, it is not easy to condense from the mixed gas under the three-stage condensation process at -70℃, and since on-site loading is a dynamic process, the amount and concentration of the loading exhaust gas entering the catalytic oxidation gas after condensation fluctuates greatly, which can easily cause large fluctuations in the temperature of the reaction bed of the catalytic oxidation unit, and there will be frequent exceeding of the standard problem at the exhaust gas online detection outlet. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an oil and gas recovery and treatment device that can adsorb and catalytically oxidize the exhaust gas from loading of materials such as gasoline, diesel, and aviation kerosene, thereby helping to ensure that the exhaust gas meets the treatment standards.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions. The utility model is an oil and gas recovery and processing device with adsorption function, including an oil and gas recovery and processing pipeline, one end of the oil and gas recovery and processing pipeline is set as an air inlet for inputting condensed oil and gas, and the other end of the oil and gas recovery and processing pipeline is set as an air outlet. The oil and gas recovery and processing pipeline on the air inlet side is connected with an activated carbon adsorption unit, and the oil and gas recovery and processing pipeline on the air outlet side is connected with a catalytic oxidation unit; the activated carbon adsorption unit is also connected with a vacuum analysis pipeline and a vacuum breaking and purge pipeline, and the vacuum analysis pipeline is connected with a vacuum analysis valve, a vacuum pump and a condenser in sequence, and the other end of the vacuum analysis pipeline is connected with the air inlet, and a vacuum breaking and purge valve is installed on the vacuum breaking and purge pipeline, and the other end of the vacuum breaking and purge pipeline is externally connected to a nitrogen supply pipeline.

[0005] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the oil and gas recovery and processing device with adsorption function mentioned above, the oil and gas recovery and processing pipeline at the activated carbon adsorption unit is also connected to a bypass pipeline I arranged in parallel with the activated carbon adsorption unit, and a bypass control valve I is installed on the bypass pipeline I.

[0006] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the above-mentioned oil and gas recovery and processing device with adsorption function, the activated carbon adsorption unit includes two activated carbon adsorption tanks arranged in parallel.

[0007] The technical problem to be solved by the present invention can be further achieved through the following technical scheme. For the above-mentioned oil and gas recovery and processing device with adsorption function, a booster fan I is installed on the oil and gas recovery and processing pipeline at the catalytic oxidation unit.

[0008] The technical problem to be solved by the utility model can be further achieved through the following technical solutions. For the above-mentioned oil and gas recovery and processing device with adsorption function, a booster fan II is also installed on the vacuum analysis line between the vacuum pump and the condenser.

[0009] The technical problem to be solved by the present invention can be further achieved through the following technical scheme. For the oil and gas recovery and processing device with adsorption function described above, an oil and gas input pipeline with a control valve and a nitrogen input pipeline with a control valve are also connected to the air inlet end of the booster fan II.

[0010] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the above-mentioned oil and gas recovery and processing device with adsorption function, a bypass pipeline II is also connected in parallel to the vacuum analysis pipeline at the booster fan II, and a bypass control valve II is installed on the bypass pipeline II.

[0011] Compared with the prior art, the utility model adds an activated carbon adsorption unit in front of the catalytic oxidation unit, thereby homogenizing the oil and gas entering the catalytic oxidation unit, making the catalytic oxidation unit run smoothly. At the same time, a small amount of non-condensable gas components at the rear end of the condensation can be effectively reduced after adsorption treatment, which can effectively reduce the concentration of the mixed oil and gas entering the catalytic oxidation unit, thereby achieving standard treatment of gasoline, diesel, aviation kerosene and other loaded oil and gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] Reference Figure 1, an oil and gas recovery and treatment device with adsorption function, comprising an oil and gas recovery and treatment pipeline 1, one end of the oil and gas recovery and treatment pipeline 1 is set as an air inlet end for inputting condensed oil and gas, and the other end of the oil and gas recovery and treatment pipeline 1 is set as an air outlet end. The oil and gas recovery and treatment pipeline 1 on the air inlet side is connected with an activated carbon adsorption unit 2 for adsorbing the condensed oil and gas, and the oil and gas recovery and treatment pipeline 1 on the air outlet side is connected with a catalytic oxidation unit 3 for catalytically oxidizing the oil and gas so that the oil and gas can meet the emission standards. The setting of the activated carbon adsorption unit 2 can not only adsorb light hydrocarbon gas components with relatively stable molecular structures such as C3 and C4 in the condensed oil and gas, thereby reducing the catalytic oxidation concentration of the oil and gas at the rear end of the condensation, but also solve the problem of large fluctuations in the amount of exhaust gas during the loading process of gasoline, aviation kerosene, diesel, etc., which has a large impact on the catalytic oxidation unit 3, effectively buffer and mix different loaded exhaust gases to ensure that the catalytic oxidation unit 3 treats the exhaust gas in a balanced manner, thereby ensuring that the loaded exhaust gas meets the standard treatment.

[0015] In order to ensure the normal and stable operation of the activated carbon adsorption unit 2, a vacuum analysis pipeline 4 and a vacuum breaking and purge pipeline 5 are also connected to the activated carbon adsorption unit 2. The vacuum analysis pipeline 4 is sequentially connected with a vacuum analysis valve, a vacuum pump 6 and a condenser 7, so that the vacuum pump 6 and the condenser 7 can be used to perform vacuum analysis on the activated carbon adsorption unit 2. The other end of the vacuum analysis pipeline 4 is connected to the air inlet end, so as to return the oil and gas obtained by the vacuum analysis for further processing. A vacuum breaking and purge valve is installed on the vacuum breaking and purge pipeline 5, and the other end of the vacuum breaking and purge pipeline 5 is externally connected to a nitrogen supply pipeline, so as to input nitrogen into the activated carbon adsorption unit 2, so as to facilitate vacuum breaking and purge, and complete the regeneration of the homogenized adsorbent.

[0016] Preferably, the activated carbon adsorption unit 2 includes two activated carbon adsorption tanks arranged in parallel, which is convenient for intermittent regeneration, ensures uninterrupted adsorption operation, and helps to ensure that the vehicle exhaust gas meets the treatment standards.

[0017] In order to ensure the pressure of the oil and gas, a booster fan I9 is ​​installed on the oil and gas recovery processing pipeline 1 at the catalytic oxidation unit 3, and a booster fan II10 is also installed on the vacuum analysis pipeline 4 between the vacuum pump 6 and the condenser 7.

[0018] In actual use, the air inlet end of the booster fan II10 is also connected with an oil and gas input pipeline 11 with a control valve and a nitrogen input pipeline 12 with a control valve, so that the booster fan II10 can be used to input oil and gas, so that the condenser 7 can be used to condense the oil and gas, and the condensed oil and gas are sent to the air inlet end, which helps to improve the utilization rate of the condenser 7; a bypass pipeline II13 is also connected in parallel to the vacuum analysis pipeline 4 at the booster fan II10, and a bypass control valve II is installed on the bypass pipeline II13, so that it is convenient to choose whether to use the booster fan II10 for pressurization processing according to needs, so as to meet different usage requirements;

[0019] The oil and gas recovery processing pipeline 1 at the activated carbon adsorption unit 2 is also connected to a bypass pipeline I8 arranged in parallel with the activated carbon adsorption unit 2. A bypass control valve I is installed on the bypass pipeline I8, which is convenient for selecting whether to use the activated carbon adsorption unit 2 for adsorption treatment according to needs, so as to meet different usage requirements.

[0020] The innovative features of the oil and gas recovery and processing device with adsorption function provided by the utility model are:

[0021] The loading oil and gas flow of gasoline, jet fuel and diesel changes from 0 to 2800 Nm3 / h, which is not conducive to the stable operation of the catalytic oxidation unit. In order to stabilize the operation of the catalytic oxidation unit as much as possible and reduce the impact of the current carbon steel pipeline on the catalyst, an activated carbon adsorption unit is installed in front of the catalytic oxidation unit to homogenize and buffer the oil and gas entering the catalytic oxidation unit, making the catalytic oxidation unit run more stably. Specifically:

[0022] After condensation and pressurization, the oil and gas are adsorbed by the activated carbon adsorption unit and then enter the catalytic oxidation unit. The saturated adsorbent is desorbed by vacuum, and the desorbed gas is sent to the condenser by the vacuum pump for condensation, and then sent back to the activated carbon adsorption unit for re-adsorption treatment;

[0023] In particular, the activated carbon adsorption unit includes two activated carbon adsorption tanks, each with a capacity of 38m 3 The volume of a single tank of homogenizer is 20m 3 The adsorption time is set to 1800s, the analysis time is designed to be 1200s, and the vacuum breaking time is 400s. The condensed mixed oil and gas are processed through the adsorption-analysis-vacuum breaking operation mode;

[0024] The adsorption tank is designed as a double tank, divided into activated carbon adsorption tank A and activated carbon adsorption tank B. The operation mode is:

[0025] Adsorption process: After gasoline and jet fuel are condensed, the oil and gas enter the adsorption tank A, and the tank area homogenization adsorbent adsorbs the oil and gas. After adsorption, the oil and gas enter the front end of the catalytic oxidation unit and mix with the air pipeline. After the catalytic oxidation chamber reacts with the precious metal catalyst, the emission reaches the standard.

[0026] Analysis process: After adsorption tank A has been adsorbed for 1800s, adsorption tank B is switched to adsorption, and adsorption tank A is analyzed. A vacuum pump is used to evacuate for 1200s to extract the oil and gas molecules adhering to the surface of the adsorbent. The adsorption tank is set with a negative pressure interlock. When the negative pressure of the adsorption tank reaches -100KPa, the vacuum pump is interlocked and stopped. After extraction, the oil and gas are condensed through the three-stage condensation channel of gasoline. The condensable molecules are condensed into condensate at a low temperature of -70℃ and flow into the condensate collection tank for storage;

[0027] Vacuum breaking and purging process: When the analysis time of adsorption tank A reaches 1200s, the vacuum pump stops running, the nitrogen purge valve on the top of the adsorption tank is opened, and 0.7MPa nitrogen is used to break the vacuum and purge the adsorption tank to complete the regeneration process of the homogenized adsorbent in adsorption tank A.

[0028] Beneficial effects of the utility model:

[0029] By adding an activated carbon adsorption unit in front of the catalytic oxidation unit, the oil and gas entering the catalytic oxidation unit can be homogenized, making the catalytic oxidation unit run smoothly. At the same time, a small amount of non-condensable gas components at the rear end of the condensation can be effectively reduced after adsorption treatment, which can effectively reduce the concentration of mixed oil and gas entering the catalytic oxidation unit, thereby achieving standard treatment of gasoline, diesel, aviation kerosene and other loading oil and gas.

Claims

1. An oil and gas recovery and processing device with adsorption function, characterized in that: It includes an oil and gas recovery and processing pipeline, one end of which is set as an air inlet for inputting condensed oil and gas, and the other end of the oil and gas recovery and processing pipeline is set as an air outlet. The oil and gas recovery and processing pipeline on the air inlet side is connected with an activated carbon adsorption unit, and the oil and gas recovery and processing pipeline on the air outlet side is connected with a catalytic oxidation unit; the activated carbon adsorption unit is also connected with a vacuum analysis pipeline and a vacuum breaking and purge pipeline, and the vacuum analysis pipeline is connected with a vacuum analysis valve, a vacuum pump and a condenser in sequence, the other end of the vacuum analysis pipeline is connected with the air inlet, a vacuum breaking and purge valve is installed on the vacuum breaking and purge pipeline, and the other end of the vacuum breaking and purge pipeline is externally connected to a nitrogen supply pipeline.

2. The oil and gas recovery and processing device with adsorption function according to claim 1 is characterized in that: The oil and gas recovery processing pipeline at the activated carbon adsorption unit is also connected to a bypass pipeline I arranged in parallel with the activated carbon adsorption unit, and a bypass control valve I is installed on the bypass pipeline I.

3. The oil and gas recovery and processing device with adsorption function according to claim 1 or 2, characterized in that: The activated carbon adsorption unit comprises two activated carbon adsorption tanks arranged in parallel.

4. The oil and gas recovery and processing device with adsorption function according to claim 1 is characterized in that: A booster fan I is installed on the oil and gas recovery processing pipeline at the catalytic oxidation unit.

5. The oil and gas recovery and processing device with adsorption function according to claim 1 is characterized in that: A booster fan II is also installed on the vacuum analysis line between the vacuum pump and the condenser.

6. The oil and gas recovery and processing device with adsorption function according to claim 5 is characterized in that: The air inlet end of the booster fan II is also connected to an oil and gas input pipeline with a control valve and a nitrogen input pipeline with a control valve.

7. The oil and gas recovery and processing device with adsorption function according to claim 5 is characterized in that: A bypass pipeline II is also connected in parallel to the vacuum analysis pipeline at the booster fan II, and a bypass control valve II is installed on the bypass pipeline II.

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