Micro-negative pressure crude oil VOCs absorption treatment device and method

Abstract

The invention discloses a micro-negative pressure crude oil VOCS absorption treatment device which comprises a fire retardant module, the inlet end of the fire retardant module is connected with a crude oil VOCs collection system through a pipeline, the outlet end of the fire retardant module is connected with a VOCs treatment module through a pipeline, and the VOCs treatment module is sequentially connected with an air draft module and a cooling exhaust module through pipelines. The invention further discloses a micro-negative pressure crude oil VOCS absorption treatment method. According to the micro-negative pressure crude oil VOCS absorption treatment device and method disclosed by the invention, the recovery efficiency when the content of non-methane hydrocarbons in crude oil volatile gas is relatively low is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of natural gas extraction, and specifically relates to slightly negative pressure crude oil VOC S Absorption treatment device, also involving micro-negative pressure crude oil VOC S Absorption treatment method. Background Art

[0002] The conventional VOCs treatment process is to collect the volatile gas from the crude oil storage tank by vacuuming in a large tank, and then use processes such as low-temperature condensation, pressure swing adsorption, membrane separation or catalytic combustion to treat or recycle the volatile VOCs gas in the storage tank. When the non-methane hydrocarbon content of the crude oil volatile gas is relatively low, the conventional VOCs treatment process can achieve the treatment standard, but the treatment cost is high and the recovery efficiency is low. The present invention is mainly a VOCs treatment equipment developed for the working condition where the non-methane hydrocarbons in the crude oil volatile gas do not have recovery value. The VOCs treatment device uses a micro-negative pressure to make the volatile VOCs gas discharged from the crude oil storage tank undergo a VOCs treatment device, and the VOCs treatment device absorbs and treats the volatile VOCs to achieve standard emissions. Summary of the invention

[0003] The purpose of the present invention is to provide a slightly negative pressure crude oil VOC S The absorption treatment device improves the recovery efficiency when the non-methane hydrocarbon content of crude oil volatile gas is low.

[0004] Another object of the present invention is to provide a slightly negative pressure crude oil VOC S Absorption treatment method.

[0005] The technical solution adopted by the present invention is to use slightly negative pressure crude oil VOC S The absorption treatment device includes a fire-blocking module, the inlet end of the fire-blocking module is connected to the crude oil VOCs collection system through a pipeline, the outlet end of the fire-blocking module is connected to the VOCs treatment module through a pipeline, and the VOCs treatment module is sequentially connected to the exhaust module and the cooling exhaust module through pipelines.

[0006] The present invention is also characterized in that: The VOCs processing module includes a gas processor, an air inlet pipeline is provided at the bottom of the side wall of the gas processor, one end of the air inlet pipeline is connected to the fire-retardant module, the other end of the air inlet pipeline is connected to a foamer, a chemical solution layer is provided in the gas processor, a chemical circulation liquid inlet pipeline is also provided at the bottom of the side wall of the gas processor, one end of the chemical circulation liquid inlet pipeline is inserted into the chemical solution layer, the other end of the chemical circulation liquid inlet pipeline is connected to a chemical circulation pump, the outlet end of the chemical circulation pump is connected to a chemical spraying pipeline, the other end of the chemical spraying pipeline is connected to a sprayer, the sprayer is fixedly connected to the inner wall of the gas processor, a reaction layer is provided in the gas processor between the chemical solution layer and the sprayer, a treated gas collector is fixedly connected to the top of the inner wall of the gas processor, an air outlet pipeline is connected to the treated gas collector outlet end, the other end of the air outlet pipeline is connected to the exhaust module, and a condensation layer is provided in the gas processor between the treated gas collector and the sprayer.

[0007] The reagent spraying pipeline is provided with a reagent spraying valve, and the reagent spraying valve is arranged outside the gas processor.

[0008] An air intake valve is arranged on the air intake pipeline, and the air intake valve is arranged outside the gas processor.

[0009] The foamer is arranged at the bottom of the gas processor, and the air inlet pipeline passes through the gas processor and is connected with the foamer.

[0010] The reagent circulation pump is arranged outside the gas processor, and the reagent circulation liquid inlet pipeline passes through the gas processor and is connected with the reagent circulation pump.

[0011] The liquid level of the pharmaceutical solution layer is greater than the setting height of the foamer.

[0012] Another technical solution adopted by the present invention is to use slightly negative pressure crude oil VOC S The absorption treatment method comprises the following steps: S1. Turn on the exhaust module to extract the air in the gas processor to form a slightly negative pressure state in the gas processor; S2. Open the air inlet valve and the foamer to input crude oil VOC into the gas processor. S Gas, for preliminary absorption; S3. Open the reagent spray valve and reagent circulation pump to remove VOC from crude oil after initial absorption. S The gas undergoes secondary absorption; S4, open the treatment gas collector, and collect the crude oil VOC after secondary absorption S The gas is transmitted to the cooling exhaust module through the outlet pipeline for cooling and exhaust.

[0013] The beneficial effects of the present invention are: The micro-negative pressure crude oil VOCS absorption treatment device and method provided by the present invention adopts a proprietary agent for the first time to absorb and remove non-methane hydrocarbons in the volatile gas of the crude oil storage tank by an absorption method, and the VOCs total non-methane hydrocarbon removal rate reaches more than 90%; the exhaust module is arranged after the VOCs treatment device for the first time, and the exhaust device is used to realize micro-negative pressure upstream and downstream of the VOCs treatment device, so that the crude oil VOCs volatile gas before the VOCs treatment device is self-absorbed into the VOCs treatment device, meeting the requirements of the upstream VOCs collection system entering the VOCs treatment equipment, and after absorption and treatment by the VOCs treatment equipment, it is discharged in compliance with the standards through the cooling exhaust module; the exhaust module extracts the gas treated by the VOCs treatment module to the cooling exhaust module, and the saturated water and free water contained in the treated VOCs gas are collected again by the cooling exhaust pipe, and then discharged through the exhaust pipe, so as to achieve standard discharge and improve the recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the micro-negative pressure crude oil VOCS absorption treatment device of the present invention; Figure 2 It is a structural schematic diagram of the VOCs processing module of the present invention.

[0015] In the figure, 1. crude oil VOCs collection system, 2. fire-retardant module, 3. VOCs treatment module, 4. exhaust module, 5. cooling exhaust module, 6. air inlet pipeline, 7. foamer, 8. reaction layer, 9. sprayer, 10. coalescence layer, 11. treated gas collector, 12. air outlet pipeline, 13. reagent circulation inlet pipeline, 14. reagent circulation pump, 15. reagent spray pipeline, 16. gas processor, 17. reagent solution layer, 18. reagent spray valve, 19. air inlet valve. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] The micro-negative pressure crude oil VOC provided by the present invention S Absorption treatment devices, such as Figure 1 As shown, it includes a fire-blocking module 2, the inlet end of which is connected to the crude oil VOCs collection system 1 through a pipeline, so that the fire-generating factors in the crude oil VOCs gas in the crude oil VOCs collection system 1 can be removed through the fire-blocking module 2, and the outlet end of the fire-blocking module 2 is connected to the VOCs treatment module 3 through a pipeline, and the VOCs treatment module 3 is sequentially connected to the exhaust module 4 and the cooling exhaust module 5 through pipelines. Figure 2As shown, the VOCs processing module 3 includes a gas processor 16, an air inlet pipeline 6 is provided at the bottom of the side wall of the gas processor 16, one end of the air inlet pipeline 6 is connected to the fire-blocking module 2, and the other end of the air inlet pipeline 6 is connected to a foaming device 7, which is convenient for foaming through the foaming device 7 to increase the contact area of ​​the incoming gas, and a pharmaceutical solution layer 17 is provided in the gas processor 16, and a pharmaceutical circulation liquid inlet pipeline 13 is also provided at the bottom of the side wall of the gas processor 16, one end of the pharmaceutical circulation liquid inlet pipeline 13 is inserted into the pharmaceutical solution layer 17, and the other end of the pharmaceutical circulation liquid inlet pipeline 13 is connected to a pharmaceutical circulation pump 14, and the outlet end of the pharmaceutical circulation pump 14 is connected to a pharmaceutical spraying pipeline 15, and the other end of the pharmaceutical spraying pipeline 15 is connected to a sprayer 9, and the sprayer 9 is fixedly connected to the inner wall of the gas processor 16, and a reaction layer 8 is provided in the gas processor 16 between the pharmaceutical solution layer 17 and the sprayer 9, and a treatment layer 8 is fixedly connected to the top of the inner wall of the gas processor 16 A gas collecting device 11 is provided, and an outlet pipe 12 is connected to the outlet end of the processing gas collecting device 11, and the other end of the air outlet pipe 12 is connected to the exhaust module 4. A coalescing layer 10 is provided in the gas processing device 16 between the processing gas collecting device 11 and the sprayer 9; a reagent spraying valve 18 is provided on the reagent spraying pipe 15 to control the inlet and outlet amount of the gas, and the reagent spraying valve 18 is arranged outside the gas processing device 16; an inlet valve 19 is provided on the inlet pipe 6 to control the inlet amount of the gas, and the inlet valve 19 is arranged outside the gas processing device 16; a foamer 7 is arranged at the bottom of the gas processing device 16, and the inlet pipe 6 passes through the gas processing device 16 and is connected to the foamer 7; a reagent circulation pump 14 is arranged outside the gas processing device 16, and a reagent circulation liquid inlet pipe 13 passes through the gas processing device 16 and is connected to the reagent circulation pump 14; the liquid level of the reagent solution layer 17 is greater than the setting height of the foamer 7 to facilitate full absorption.

[0018] Example 1 The slightly negative pressure crude oil VOC proposed in this embodiment S Absorption treatment devices, such as Figure 1 As shown, it includes a fire-blocking module 2, the inlet end of the fire-blocking module 2 is connected to the crude oil VOCs collection system 1 through a pipeline, the outlet end of the fire-blocking module 2 is connected to the VOCs processing module 3 through a pipeline, and the VOCs processing module 3 is sequentially connected to the exhaust module 4 and the cooling exhaust module 5 through pipelines.

[0019] Example 2 The slightly negative pressure crude oil VOC proposed in this embodiment S Absorption treatment devices, such as Figure 1 As shown, it includes a fire-blocking module 2, the inlet end of the fire-blocking module 2 is connected to the crude oil VOCs collection system 1 through a pipeline, the outlet end of the fire-blocking module 2 is connected to the VOCs treatment module 3 through a pipeline, and the VOCs treatment module 3 is sequentially connected to the exhaust module 4 and the cooling exhaust module 5 through pipelines. Figure 2As shown, the VOCs treatment module 3 includes a gas processor 16, an air inlet pipeline 6 is provided at the bottom of the side wall of the gas processor 16, one end of the air inlet pipeline 6 is connected to the fire-blocking module 2, and the other end of the air inlet pipeline 6 is connected to a foaming device 7, a pharmaceutical solution layer 17 is provided in the gas processor 16, and a pharmaceutical circulation liquid inlet pipeline 13 is also provided at the bottom of the side wall of the gas processor 16, one end of the pharmaceutical circulation liquid inlet pipeline 13 is inserted into the pharmaceutical solution layer 17, and the other end of the pharmaceutical circulation liquid inlet pipeline 13 is connected to a pharmaceutical circulation pump 14, and the outlet of the pharmaceutical circulation pump 14 A reagent spray pipeline 15 is connected to one end of the reagent spray pipeline 15, and the other end of the reagent spray pipeline 15 is connected to a sprayer 9, the sprayer 9 is fixedly connected to the inner wall of the gas processor 16, a reaction layer 8 is arranged in the gas processor 16 between the reagent solution layer 17 and the sprayer 9, a treated gas collector 11 is fixedly connected to the top of the inner wall of the gas processor 16, an outlet end of the treated gas collector 11 is connected to an outlet pipeline 12, the other end of the outlet pipeline 12 is connected to the exhaust module 4, and a coalescence layer 10 is arranged in the gas processor 16 between the treated gas collector 11 and the sprayer 9.

[0020] Example 3 The slightly negative pressure crude oil VOC proposed in this embodiment S Absorption treatment devices, such as Figure 1 As shown, it includes a fire-blocking module 2, the inlet end of the fire-blocking module 2 is connected to the crude oil VOCs collection system 1 through a pipeline, the outlet end of the fire-blocking module 2 is connected to the VOCs treatment module 3 through a pipeline, and the VOCs treatment module 3 is sequentially connected to the exhaust module 4 and the cooling exhaust module 5 through pipelines. Figure 2 As shown, the VOCs processing module 3 includes a gas processor 16, an air inlet pipeline 6 is provided at the bottom of the side wall of the gas processor 16, one end of the air inlet pipeline 6 is connected to the fire-blocking module 2, and the other end of the air inlet pipeline 6 is connected to a foaming device 7, a pharmaceutical solution layer 17 is provided in the gas processor 16, and a pharmaceutical circulation liquid inlet pipeline 13 is also provided at the bottom of the side wall of the gas processor 16, one end of the pharmaceutical circulation liquid inlet pipeline 13 is inserted into the pharmaceutical solution layer 17, and the other end of the pharmaceutical circulation liquid inlet pipeline 13 is connected to a pharmaceutical circulation pump 14, and the outlet end of the pharmaceutical circulation pump 14 is connected to a pharmaceutical spraying pipeline 15, and the other end of the pharmaceutical spraying pipeline 15 is connected to a sprayer 9, and the sprayer 9 is fixed Connected to the inner wall of the gas processor 16, a reaction layer 8 is provided in the gas processor 16 between the reagent solution layer 17 and the sprayer 9, a treated gas collector 11 is fixedly connected to the top of the inner wall of the gas processor 16, an outlet end of the treated gas collector 11 is connected to an outlet pipeline 12, and the other end of the outlet pipeline 12 is connected to the exhaust module 4, and a coalescence layer 10 is provided in the gas processor 16 between the treated gas collector 11 and the sprayer 9; a reagent spray valve 18 is provided on the reagent spray pipeline 15, and the reagent spray valve 18 is provided outside the gas processor 16; an intake valve 19 is provided on the intake pipeline 6, and the intake valve 19 is provided outside the gas processor 16.

[0021] Example 4 The slightly negative pressure crude oil VOC proposed in this embodiment S Absorption treatment devices, such as Figure 1 As shown, it includes a fire-blocking module 2, the inlet end of the fire-blocking module 2 is connected to the crude oil VOCs collection system 1 through a pipeline, the outlet end of the fire-blocking module 2 is connected to the VOCs treatment module 3 through a pipeline, and the VOCs treatment module 3 is sequentially connected to the exhaust module 4 and the cooling exhaust module 5 through pipelines. Figure 2 As shown, the VOCs processing module 3 includes a gas processor 16, an air inlet pipeline 6 is provided at the bottom of the side wall of the gas processor 16, one end of the air inlet pipeline 6 is connected to the fire-blocking module 2, and the other end of the air inlet pipeline 6 is connected to a foaming device 7. A pharmaceutical solution layer 17 is provided in the gas processor 16, and a pharmaceutical circulation liquid inlet pipeline 13 is also provided at the bottom of the side wall of the gas processor 16. One end of the pharmaceutical circulation liquid inlet pipeline 13 is inserted into the pharmaceutical solution layer 17, and the other end of the pharmaceutical circulation liquid inlet pipeline 13 is connected to a pharmaceutical circulation pump 14, and the outlet end of the pharmaceutical circulation pump 14 is connected to a pharmaceutical spraying pipeline 15, and the other end of the pharmaceutical spraying pipeline 15 is connected to a sprayer 9, and the sprayer 9 is fixed to the inner wall of the gas processor 16, and a reaction layer 8 is provided in the gas processor 16 between the pharmaceutical solution layer 17 and the sprayer 9. A treated gas collector 11 is fixedly connected to the top of the inner wall of the gas processor 16, and an outlet end of the treated gas collector 11 is connected to an outlet pipeline 12, and the other end of the outlet pipeline 12 is connected to the exhaust module 4. A coalescing layer 10 is provided in the gas processor 16 between the treated gas collector 11 and the sprayer 9; an agent spray valve 18 is provided on the agent spray pipeline 15, and the agent spray valve 18 is arranged outside the gas processor 16; an air intake valve 19 is provided on the air intake pipeline 6, and the air intake valve 19 is arranged outside the gas processor 16; a foamer 7 is arranged at the bottom of the gas processor 16, and the air intake pipeline 6 passes through the gas processor 16 and is connected to the foamer 7; a drug circulation pump 14 is arranged outside the gas processor 16, and a drug circulation liquid inlet pipeline 13 passes through the gas processor 16 and is connected to the drug circulation pump 14.

[0022] Example 5 The slightly negative pressure crude oil VOC proposed in this embodiment S Absorption treatment devices, such as Figure 1 As shown, it includes a fire-blocking module 2, the inlet end of the fire-blocking module 2 is connected to the crude oil VOCs collection system 1 through a pipeline, the outlet end of the fire-blocking module 2 is connected to the VOCs treatment module 3 through a pipeline, and the VOCs treatment module 3 is sequentially connected to the exhaust module 4 and the cooling exhaust module 5 through pipelines. Figure 2As shown, the VOCs processing module 3 includes a gas processor 16, an air inlet pipeline 6 is provided at the bottom of the side wall of the gas processor 16, one end of the air inlet pipeline 6 is connected to the fire-blocking module 2, and the other end of the air inlet pipeline 6 is connected to a foaming device 7, a pharmaceutical solution layer 17 is provided in the gas processor 16, and a pharmaceutical circulation liquid inlet pipeline 13 is also provided at the bottom of the side wall of the gas processor 16, one end of the pharmaceutical circulation liquid inlet pipeline 13 is inserted into the pharmaceutical solution layer 17, and the other end of the pharmaceutical circulation liquid inlet pipeline 13 is connected to a pharmaceutical circulation pump 14, and the outlet end of the pharmaceutical circulation pump 14 is connected to a pharmaceutical spraying pipeline 15, and the other end of the pharmaceutical spraying pipeline 15 is connected to a sprayer 9, and the sprayer 9 is fixed to the inner wall of the gas processor 16, and a reaction layer 8 is provided in the gas processor 16 between the pharmaceutical solution layer 17 and the sprayer 9, and the top of the inner wall of the gas processor 16 is fixed to There is a treated gas collector 11, and the outlet end of the treated gas collector 11 is connected to an outlet pipeline 12, and the other end of the outlet pipeline 12 is connected to the exhaust module 4. A coalescing layer 10 is provided in the gas processor 16 between the treated gas collector 11 and the sprayer 9; a reagent spray valve 18 is provided on the reagent spray pipeline 15, and the reagent spray valve 18 is arranged outside the gas processor 16; an air intake valve 19 is provided on the air intake pipeline 6, and the air intake valve 19 is arranged outside the gas processor 16; a foamer 7 is arranged at the bottom of the gas processor 16, and the air intake pipeline 6 passes through the gas processor 16 and is connected to the foamer 7; a pharmaceutical circulation pump 14 is arranged outside the gas processor 16, and a pharmaceutical circulation liquid inlet pipeline 13 passes through the gas processor 16 and is connected to the pharmaceutical circulation pump 14; the liquid level of the pharmaceutical solution layer 17 is greater than the setting height of the foamer 7.

[0023] Example 6 The slightly negative pressure crude oil VOC proposed in this embodiment S The absorption treatment method comprises the following steps: S1. Turn on the exhaust module to extract the air in the gas processor to form a slightly negative pressure state in the gas processor; S2. Open the air inlet valve and the foamer to input crude oil VOC into the gas processor. S Gas, for preliminary absorption; S3. Open the reagent spray valve and reagent circulation pump to remove VOC from crude oil after initial absorption. S The gas undergoes secondary absorption; S4, open the treatment gas collector, and collect the crude oil VOC after secondary absorption S The gas is transmitted to the cooling exhaust module through the outlet pipeline for cooling and exhaust.

Claims

1. Micro-negative pressure crude oil VOC S The absorption treatment device is characterized in that It comprises a fire-blocking module (2), wherein the inlet end of the fire-blocking module (2) is connected to a crude oil VOCs collection system (1) via a pipeline, the outlet end of the fire-blocking module (2) is connected to a VOCs processing module (3) via a pipeline, and the VOCs processing module (3) is sequentially connected to an exhaust module (4) and a cooling exhaust module (5) via pipelines.

2. The slightly negative pressure crude oil VOC according to claim 1 S The absorption treatment device is characterized in that The VOCs processing module (3) comprises a gas processor (16), an air inlet pipeline (6) is provided at the bottom of the side wall of the gas processor (16), one end of the air inlet pipeline (6) is connected to the fire-blocking module (2), and the other end of the air inlet pipeline (6) is connected to a foaming device (7), a pharmaceutical solution layer (17) is provided inside the gas processor (16), and a pharmaceutical circulation liquid inlet pipeline (13) is also provided at the bottom of the side wall of the gas processor (16), one end of the pharmaceutical circulation liquid inlet pipeline (13) is inserted into the pharmaceutical solution layer (17), the other end of the pharmaceutical circulation liquid inlet pipeline (13) is connected to a pharmaceutical circulation pump (14), and the outlet end of the pharmaceutical circulation pump (14) is connected to a pharmaceutical A spray pipeline (15), the other end of the reagent spray pipeline (15) is connected to a sprayer (9), the sprayer (9) is fixedly connected to the inner wall of the gas processor (16), a reaction layer (8) is provided in the gas processor (16) between the reagent solution layer (17) and the sprayer (9), a treatment gas collector (11) is fixedly connected to the top of the inner wall of the gas processor (16), the outlet end of the treatment gas collector (11) is connected to an outlet pipeline (12), the other end of the outlet pipeline (12) is connected to the exhaust module (4), and a coalescence layer (10) is provided in the gas processor (16) between the treatment gas collector (11) and the sprayer (9).

3. The slightly negative pressure crude oil VOC according to claim 2 S The absorption treatment device is characterized in that The reagent spraying pipeline (15) is provided with a reagent spraying valve (18), and the reagent spraying valve (18) is arranged outside the gas processor (16).

4. The slightly negative pressure crude oil VOC according to claim 3 S The absorption treatment device is characterized in that The air intake pipeline (6) is provided with an air intake valve (19), and the air intake valve (19) is arranged outside the gas processor (16).

5. The slightly negative pressure crude oil VOC according to claim 4 S The absorption treatment device is characterized in that The foamer (7) is arranged at the bottom of the gas processor (16), and the air inlet pipeline (6) passes through the gas processor (16) and is connected to the foamer (7).

6. The slightly negative pressure crude oil VOC according to claim 5 S The absorption treatment device is characterized in that The medicine circulation pump (14) is arranged outside the gas processor (16), and the medicine circulation liquid inlet pipeline (13) passes through the gas processor (16) and is connected to the medicine circulation pump (14).

7. The slightly negative pressure crude oil VOC according to claim 6 S The absorption treatment device is characterized in that The liquid level of the drug solution layer (17) is greater than the setting height of the foamer (7).

8. Micro-negative pressure crude oil VOC S The absorption treatment method is characterized in that Use of the slightly negative pressure crude oil VOC as claimed in claim 7 S The absorption treatment device comprises the following steps: S1. Turn on the exhaust module to extract the air in the gas processor to form a slightly negative pressure state in the gas processor; S2. Open the air inlet valve and the foamer to input crude oil VOC into the gas processor. S Gas, for preliminary absorption; S3. Open the reagent spray valve and reagent circulation pump to remove VOC from crude oil after initial absorption. S The gas undergoes secondary absorption; S4, open the treatment gas collector, and collect the crude oil VOC after secondary absorption S The gas is transmitted to the cooling exhaust module through the outlet pipeline for cooling and exhaust.

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