A multi-species easily polymerizable substance treatment oil gas recovery device
By employing a double-layer silica gel structure in conjunction with a vacuum pump and nitrogen components in the oil and gas recovery device, the problems of short activated carbon lifespan and the flammability and explosiveness of easily polymerized materials are solved, achieving efficient regeneration of the adsorbent and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING NAIDESAISI ENVIRONMENTAL PROTECTION ENG EQUIP CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-06-26
AI Technical Summary
In existing oil and gas recovery devices, conventional activated carbon has a short service life as an adsorbent, is flammable and explosive when treating easily polymerizable substances, and its adsorption capacity decreases, leading to increased operating costs.
The system employs a double-layer silica gel structure, consisting of an upper layer of microporous silica gel particles and a lower layer of mesoporous silica gel particles, which are used to treat high-concentration and low-concentration VOC gases, respectively. Desorption and purging are performed by a vacuum pump and a nitrogen assembly, enabling the adsorption tower to operate and regenerate alternately.
It extends the service life of the adsorbent, reduces the polymerization risk of easily polymerizable materials, improves adsorption capacity and regeneration performance, and reduces usage costs.
Smart Images
Figure CN224404766U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil and gas recovery technology, and in particular to an oil and gas recovery device for processing multiple types of easily polymerizable substances. Background Technology
[0002] Traditional adsorption-type oil and gas recovery devices mostly rely on activated carbon filling the adsorption tower for adsorption. However, conventional activated carbon has a short service life as an adsorbent for VOCs in oil and gas recovery devices, and its service life is even shorter when dealing with easily polymerizable substances. It is also prone to polymerization reactions due to high temperatures, and is flammable and explosive. In addition, the adsorption capacity of activated carbon gradually decreases after repeated use, and its regeneration performance is also poor, resulting in a significant increase in operating costs. Utility Model Content
[0003] The purpose of this invention is to provide a multi-variety oil and gas recovery device for treating easily polymerizable substances. It aims to solve the problems of existing oil and gas recovery devices that use conventional activated carbon as an adsorbent, which has a short service life for adsorbing VOCs and an even shorter service life for treating easily polymerizable substances. The easily polymerizable oil and gas being treated is prone to polymerization reactions due to high temperatures, and is also flammable and explosive. In addition, the adsorption capacity of activated carbon gradually decreases after repeated use, and its regeneration performance is also poor, resulting in a serious increase in operating costs.
[0004] To achieve the above objectives, this utility model provides a multi-variety easily polymerizable oil and gas recovery device, including an adsorption tower body, wherein there are two adsorption tower bodies, and the adsorption tower body is provided with a double-layer silicone structure inside.
[0005] The double-layer silicone structure has microporous silicone particles on the upper layer and mesoporous silicone particles on the lower layer. The microporous silicone particles are of type S3 and the mesoporous silicone particles are of type S6.
[0006] It also includes a gas conveying component and a monitoring component. The gas conveying component is disposed on one side of the adsorption tower body, and the monitoring component is disposed on the side of the gas conveying component close to the adsorption tower body.
[0007] The adsorption tower body is also connected to an external vacuum pump assembly and a nitrogen assembly.
[0008] The nitrogen assembly includes a nitrogen tank and a connecting pipe. The nitrogen tank is used for nitrogen storage and is connected to the adsorption tower body through the connecting pipe.
[0009] The monitoring component includes an auxiliary pipeline and a monitoring sampling connector. The auxiliary pipeline is connected to the adsorption tower body, and the monitoring sampling connector is installed on the auxiliary pipeline.
[0010] The auxiliary pipeline is also equipped with a monitoring reserved pipe, which is connected to the delivery pipe of the gas transmission assembly.
[0011] This invention relates to a multi-variety polymerizable oil and gas recovery device. VOC gases from trucks and tank farms enter the adsorption tower body. Adsorption is performed by two adsorption towers operating alternately. Each tower is double-layered with specially prepared microporous and mesoporous silica gel particles. The mesoporous silica gel particles can handle polymerizable substances such as styrene, and also adsorb high concentrations of VOC gases. The microporous silica gel particles can similarly handle polymerizable substances, and also adsorb low concentrations of VOC gases. Silica gel, whose main component is silicon dioxide, is an inorganic material with high porosity and surface area, and uniform pore size, enabling it to adsorb HC components from VOC gases. Furthermore, silica gel has good regeneration performance and can be reused after appropriate treatment. This addresses the problems of existing oil and gas recovery devices that use conventional activated carbon as an adsorbent, which has a short lifespan for VOC adsorption, especially for polymerizable substances. The activated carbon is also prone to polymerization reactions due to high temperatures, and is flammable and explosive. Additionally, the adsorption capacity of activated carbon gradually decreases after repeated use, and its regeneration performance is poor, leading to a significant increase in operating costs. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0013] Figure 1 This is a schematic diagram of the overall structure of the multi-variety easily polymerizable oil and gas recovery device of this utility model.
[0014] Figure 2 This is a schematic diagram of the nitrogen gas assembly of this utility model.
[0015] In the diagram: 101-Adsorption tower body, 102-Double-layer silica gel structure, 1021-Microporous silica gel particles, 1022-Mesoporous silica gel particles, 103-Gas delivery assembly, 104-Nitrogen tank, 105-Connecting pipe, 106-Auxiliary pipe, 107-Monitoring sampling connector, 108-Monitoring reserved pipe. Detailed Implementation
[0016] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0017] like Figure 1 and Figure 2 As shown, where Figure 1This is a schematic diagram of the overall structure of a multi-variety easily polymerizable oil and gas recovery device. Figure 2 This is a schematic diagram of a nitrogen assembly. This invention provides a multi-variety polymerizable oil and gas recovery device, comprising an adsorption tower body 101, a gas conveying assembly 103, and a monitoring assembly. The adsorption tower body 101 has a double-layer silica gel structure 102 inside, with microporous silica gel particles 1021 on the upper layer and mesoporous silica gel particles 1022 on the lower layer. The nitrogen assembly includes a nitrogen tank 104 and a connecting pipe 105. The monitoring assembly includes an auxiliary pipe 106 and a monitoring sampling connector 107. This solution addresses the problem in existing oil and gas recovery devices that rely on activated carbon for adsorption. However, activated carbon's adsorption capacity gradually decreases after repeated use, and its regeneration performance is poor, leading to a significant increase in operating costs. Therefore, this solution can help reduce operating costs.
[0018] In this embodiment, there are two adsorption tower bodies 101.
[0019] The adsorption tower body 101 is provided with a double-layer silicone structure 102 inside; the double-layer silicone structure 102 is used for adsorption.
[0020] The upper layer of the double-layer silica structure 102 consists of microporous silica particles 1021, and the lower layer consists of mesoporous silica particles 1022. The microporous silica particles 1021 are of type S3, and the mesoporous silica particles 1022 are of type S6. The microporous silica particles 1021 and the mesoporous silica particles 1022 form a double-layer adsorption structure.
[0021] The microporous silica gel particles 1021 and the mesoporous silica gel particles 1022 are respectively filled into the mounting frames with detachable perforated end caps on the upper and lower sides. The through holes on the end caps are all smaller than the particle size of the microporous silica gel particles 1021 and the mesoporous silica gel particles 1022. The mounting frames are vertically overlapped with each other. The outer side of the mounting frame is a ring, and the size is consistent with the inner side size of the adsorption tower body 101. The adsorption tower body 101 is provided with a ring-shaped limiting block structure near the bottom of the mounting frame, and the perforated end caps on the upper and lower sides can be removed and installed. This structure is conducive to the individual division and setting of a certain amount of adsorbent particles, which is convenient for subsequent removal and processing.
[0022] The gas conveying assembly 103 is disposed on one side of the adsorption tower body 101, and the monitoring assembly is disposed on the side of the gas conveying assembly 103 near the adsorption tower body 101. The gas conveying assembly 103 is used for oil and gas input, and the monitoring assembly is used for online monitoring.
[0023] Secondly, the adsorption tower body 101 is also connected to an external vacuum pump assembly and a nitrogen assembly. The desorption section mainly adopts pressure swing desorption treatment. The vacuum pump group is used to reduce the pressure of the adsorption tower body 101. When the pressure inside the adsorption tower is reduced to a set value (4 kPaA), the device introduces nitrogen through the nitrogen assembly for purging to promote the desorption process. After a certain desorption time, the two towers undergoing adsorption or desorption are automatically switched by the action of an electric valve, and the adsorption and desorption processes will alternate in a cycle. The high-concentration VOC gas desorbed from the adsorbent in the desorption process is discharged through the vacuum pump into the condensation recovery section, and the VOCs that are not completely liquefied are recycled back into the adsorption section. After the above process is repeated, this oil and gas recovery device can operate continuously for 24 hours. Furthermore, in the condensation recovery system, the temperature of the chiller unit is set from the beginning by a pre-installed program in the control equipment and will not change the chiller unit's chilled water temperature according to different processing media. The gas flow in this section is as follows: gas → primary heat exchanger (exchanging heat with chilled water from the primary chiller unit) → secondary heat exchanger (exchanging heat with chilled water from the secondary chiller unit). During the heat exchange process, most of the high-temperature, high-concentration paraxylene and water are condensed and liquefied, and stored in a temporary storage tank (the temporary storage tank is insulated). Other unliquefied VOC gases are discharged from the temporary storage tank and enter the heat exchanger to exchange heat with chilled water (-25℃) from the chiller unit. During this heat exchange process, the remaining VOC gases are further condensed and liquefied, and stored in the temporary storage tank. VOC gases that have not yet been completely liquefied (lower concentration) are recycled to the front-end adsorption section.
[0024] Then, the nitrogen tank 104 is used for nitrogen storage and is connected to the adsorption tower body 101 via the connecting pipe 105. A safety valve is installed at the top of the nitrogen tank 104 to store the supplied nitrogen, ensuring stable nitrogen delivery. As an inert gas, nitrogen is used for purging the adsorption tower, effectively reducing the risk of polymerizable substances polymerizing within the tower. The connecting pipe 105 is used for nitrogen delivery.
[0025] Furthermore, the auxiliary pipeline 106 is connected to the adsorption tower body 101; the monitoring sampling connector 107 is disposed on the auxiliary pipeline 106. The auxiliary pipeline 106 serves as a monitoring working pipeline, and the monitoring sampling connector 107 is disposed on the pipeline.
[0026] Finally, a monitoring reserved pipe 108 is also provided on the auxiliary pipe 106, which is connected to the delivery pipe of the gas transmission assembly 103. The monitoring reserved pipe 108 is used for online monitoring.
[0027] When using the multi-variety easily polymerizable oil and gas recovery device of this utility model, the VOC gas loaded on the truck and the VOC gas from the tank farm enter the interior of the adsorption tower body 101. The adsorption treatment is carried out by two adsorption towers running alternately. The adsorption tower is filled with specially prepared microporous silica gel particles 1021 and mesoporous silica gel particles 1022 in a double layer. The mesoporous silica gel particles 1022 can treat easily polymerizable substances such as styrene, and also adsorb high concentrations of VOC gases. The microporous silica gel particles 1021 can also treat easily polymerizable substances and adsorb low concentrations of VOC gases. The main component of silica gel is silicon dioxide, which is an inorganic material with high porosity and surface area and uniform pore size. It can adsorb HC components in VOCs gases. In addition, silica gel has good regeneration performance and can be reused after appropriate treatment. This addresses the problem that existing oil and gas recovery devices use conventional activated carbon as an adsorbent, which has a short service life for adsorbing VOCs. Its service life is even shorter when treating easily polymerizable substances. The treated easily polymerizable oil and gas is prone to polymerization reaction due to high temperature rise, and it is flammable and explosive. At the same time, the adsorption capacity of activated carbon gradually decreases after repeated use, and its regeneration performance is also poor, resulting in a serious increase in operating costs.
[0028] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.
Claims
1. A multi-variety polymerizable oil and gas recovery device, comprising two adsorption tower bodies, characterized in that: The adsorption tower body is internally equipped with a double-layer silicone structure; The double-layer silicone structure has microporous silicone particles on the upper layer and mesoporous silicone particles on the lower layer. The microporous silicone particles are of type S3 and the mesoporous silicone particles are of type S6. It also includes a gas conveying component and a monitoring component. The gas conveying component is disposed on one side of the adsorption tower body, and the monitoring component is disposed on the side of the gas conveying component close to the adsorption tower body.
2. The oil and gas recovery device for processing multiple easily polymerizable substances as described in claim 1, characterized in that: The adsorption tower body is also connected to an external vacuum pump assembly and a nitrogen assembly.
3. The multi-variety polymerizable oil and gas recovery device as described in claim 2, characterized in that: The nitrogen assembly includes a nitrogen tank and a connecting pipe. The nitrogen tank is used for nitrogen storage and is connected to the adsorption tower body through the connecting pipe.
4. The multi-variety polymerizable oil and gas recovery device as described in claim 1, characterized in that: The monitoring component includes an auxiliary pipeline and a monitoring sampling connector. The auxiliary pipeline is connected to the adsorption tower body, and the monitoring sampling connector is installed on the auxiliary pipeline.
5. The multi-variety easily polymerizable oil and gas recovery device as described in claim 4, characterized in that... : The auxiliary pipeline is also equipped with a monitoring reserved pipe, which is connected to the delivery pipe of the gas transmission assembly.