Carbon dioxide desulfurization device
By using a multi-stage desulfurization process with desulfurizing agents such as ferric oxide and activated carbon to treat carbon dioxide, the problem of high sulfur content in carbon dioxide in coal chemical industry has been solved, achieving efficient and stable sulfide removal and equipment protection.
Patent Information
- Application Number
- CN202422884358.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The carbon dioxide emitted by the coal chemical industry contains a high sulfur content, which makes the carbon dioxide oil recovery process complicated, reduces solubility and permeability, and sulfides corrode equipment, increasing maintenance costs and environmental pollution.
A carbon dioxide desulfurization device is designed, including a pre-desulfurization tower, a hydrolysis tower and a fine desulfurization tower. Desulfurizers such as ferric oxide and activated carbon are used to convert and adsorb sulfides through a multi-stage desulfurization process to ensure that the sulfur content of the final product is less than 0.1ppm.
It achieves efficient and stable removal of sulfides from carbon dioxide, ensures oil recovery effect, reduces equipment corrosion and environmental pollution, and meets the demand for high-purity carbon dioxide capture.
Smart Images
Figure CN223474702U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of carbon dioxide capture, utilization and storage technology, and specifically relates to a carbon dioxide desulfurization device. Background Technology
[0002] With increasing global warming and pressure to reduce carbon emissions, carbon dioxide capture, utilization and storage (CCUS) technology has become an important means to achieve dual carbon goals. The coal chemical industry is one of the main sources of carbon emissions. CCUS technology can not only effectively reduce carbon dioxide emissions, but also apply the captured carbon dioxide to oil field development. Carbon dioxide flooding technology can improve the oil recovery rate of oil fields and is an important means in the modern chemical industry.
[0003] However, the carbon dioxide emitted by the coal chemical industry has a high sulfur content. During the carbon dioxide flooding process, sulfur can complicate the interaction between carbon dioxide and crude oil, reduce the solubility of carbon dioxide in the oil reservoir, and thus weaken its oil displacement ability. In addition, sulfides can react chemically with minerals in the oil reservoir to form precipitates, further clogging the oil reservoir and reducing the permeability of the reservoir, which greatly reduces the oil displacement effect.
[0004] Meanwhile, sulfides can corrode equipment and pipelines under high temperature and pressure, leading to equipment damage and pollution source leakage. This not only increases equipment maintenance costs but also pollutes the environment and ecosystem. Therefore, it is necessary to design a device capable of treating carbon dioxide exhaust gas to reduce the sulfur content to less than 0.1 ppm to ensure the normal operation of the carbon dioxide-assisted oil recovery process. Summary of the Invention
[0005] The purpose of this invention is to provide a carbon dioxide desulfurization device that can desulfurize carbon dioxide exhaust gas to reduce the sulfur content of the exhaust gas to less than 0.1 ppm.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A carbon dioxide desulfurization device includes an inlet compressor, a pre-desulfurization tower, a first cooler, and a heater. The heater is provided with a first inlet, a first outlet, a second inlet, and a second outlet. The output end of the inlet compressor is connected to the first inlet pipeline. The first outlet is connected to the input end pipeline of the first cooler through a pipeline. The output end of the first cooler is connected to the input end pipeline of the pre-desulfurization tower. The output end of the pre-desulfurization tower is connected to the second inlet pipeline. A desulfurizing agent is provided inside the pre-desulfurization tower.
[0008] The second gas outlet is connected to a hydrolysis pipeline, on which a first hydrolysis tower, a second hydrolysis tower, a second cooler, and a fine desulfurization tower are sequentially arranged. The output end pipeline of the fine desulfurization tower is connected to an exhaust compressor.
[0009] Furthermore, the first hydrolysis tower and the second hydrolysis tower are provided with a hydrolysis layer and an activated carbon layer, and the hydrolysis layer is provided with a hydrolysis catalyst.
[0010] Preferably, the hydrolysis catalyst is aluminum oxide.
[0011] Preferably, the desulfurization tower comprises two layers of activated carbon.
[0012] Preferably, the desulfurizing agent is ferric oxide.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. High-efficiency desulfurization capability: Through the combined action of the pre-desulfurization tower and the hydrolytic desulfurization tower, this process can effectively convert carbonyl sulfur and other sulfides in the feed gas into easily treatable hydrogen sulfide. Then, through the adsorption of activated carbon, residual hydrogen sulfide and other impurities are further removed. This multi-stage desulfurization mechanism ensures a highly efficient desulfurization effect, allowing the total sulfur content in the final feed gas to be stably controlled below 0.1 ppm.
[0015] 2. Energy Saving and Environmental Protection: The hydrolysis reaction is exothermic, which helps maintain the temperature of the reaction system and reduces the need for external heating, thus saving energy. Simultaneously, due to the high adsorption capacity of activated carbon, this process can remove impurities such as organic matter and heavy metals, improving the purity of the raw gas and reducing potential environmental pollution.
[0016] 3. Stable and reliable operation: The hydrolysis + dry desulfurization process has a reasonable flow design and tight connections between units, ensuring continuous and stable operation. Furthermore, the long service life of adsorbent materials such as activated carbon reduces the frequency of material replacement and lowers maintenance costs.
[0017] 4. High adaptability: This process can handle feed gas containing different types and concentrations of sulfides, demonstrating strong adaptability. Both hydrogen sulfide and carbonyl sulfide can be effectively removed through corresponding reaction and adsorption processes.
[0018] 5. High product quality: The raw gas after fine desulfurization treatment has extremely low levels of hydrogen sulfide and other impurities, which can meet the requirements of high-purity carbon dioxide capture projects, ensuring the stable operation of subsequent processes and the reliability of product quality.
[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a carbon dioxide desulfurization device according to an embodiment of the present invention.
[0021] Explanation of the symbols in the attached diagram: 1. Inlet compressor; 2. Pre-desulfurization tower; 3. First cooler; 4. Heater; 5. First hydrolysis tower; 6. Second hydrolysis tower; 7. Second cooler; 8. Fine desulfurization tower; 9. Exhaust compressor. Detailed Implementation
[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0026] Please see Figure 1The carbon dioxide desulfurization device shown in a preferred embodiment of this application includes an intake compressor 1, a pre-desulfurization tower 2, a first cooler 3, and a heater 4. The heater 4 is provided with a first air inlet, a first air outlet, a second air inlet, and a second air outlet. The output end of the intake compressor 1 is connected to the first air inlet pipeline. The first air outlet is connected to the input end pipeline of the first cooler 3 through a pipeline. The output end of the first cooler 3 is connected to the input end pipeline of the pre-desulfurization tower 2. The output end of the pre-desulfurization tower 2 is connected to the second air inlet pipeline.
[0027] The second outlet is connected to a hydrolysis pipeline, on which a first hydrolysis tower 5, a second hydrolysis tower 6, a second cooler 7, and a fine desulfurization tower 8 are sequentially installed. The output end of the fine desulfurization tower 8 is connected to an exhaust compressor 9.
[0028] Specifically, the pre-desulfurization tower 2 is equipped with ferric oxide to reduce hydrogen sulfide in the gas to elemental sulfur and water, thereby initially reducing the concentration of hydrogen sulfide.
[0029] Specifically, the first hydrolysis tower 5 and the second hydrolysis tower 6 are equipped with a hydrolysis layer and an activated carbon layer. The hydrolysis layer is equipped with a hydrolysis catalyst. The gas undergoes a hydrolysis reaction in the hydrolysis layer, converting carbonyl sulfur in the gas into hydrogen sulfide, which is then adsorbed by the activated carbon. The above hydrolysis reaction releases heat, which further promotes the hydrolysis reaction.
[0030] In this embodiment, the hydrolysis catalyst is aluminum oxide.
[0031] Specifically, the fine desulfurization tower 8 includes upper and lower activated carbon layers, which are used to adsorb residual hydrogen sulfide, heavy metals, organic matter and other impurities in the gas after hydrolysis.
[0032] Working principle:
[0033] The discharge pressure is 0.97-1.20 MPa, the temperature is 100-119℃, and the flow rate is 14000 Nm³. 3 The raw gas is cooled to below 40°C by heater 4 and first cooler 3 and then enters pre-desulfurization tower 2 to remove hydrogen sulfide. After being heated to 50-90°C by heater 4, it passes through two hydrolysis towers in sequence to convert carbonyl sulfur into hydrogen sulfide. After being adsorbed by activated carbon, it finally enters fine desulfurization tower 8 to adsorb the remaining hydrogen sulfide and impurities, and finally obtains a gas with a total sulfur content of no more than 0.1 ppm.
[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A carbon dioxide desulfurization device, characterized in that, The system includes an intake compressor, a pre-desulfurization tower, a first cooler, and a heater. The heater is equipped with a first intake port, a first outlet port, a second intake port, and a second outlet port. The output end of the intake compressor is connected to the first intake port pipeline. The first outlet port is connected to the input end pipeline of the first cooler via a pipeline. The output end of the first cooler is connected to the input end pipeline of the pre-desulfurization tower. The output end of the pre-desulfurization tower is connected to the second intake port pipeline. The pre-desulfurization tower contains a desulfurizing agent. The second gas outlet is connected to a hydrolysis pipeline, on which a first hydrolysis tower, a second hydrolysis tower, a second cooler, and a fine desulfurization tower are sequentially arranged. The output end pipeline of the fine desulfurization tower is connected to an exhaust compressor.
2. The carbon dioxide desulfurization device as described in claim 1, characterized in that, The first hydrolysis tower and the second hydrolysis tower are provided with a hydrolysis layer and an activated carbon layer, and the hydrolysis layer is provided with a hydrolysis catalyst.
3. A carbon dioxide desulfurization device as described in claim 2, characterized in that, The hydrolysis catalyst is aluminum oxide.
4. A carbon dioxide desulfurization device as described in claim 1, characterized in that, The desulfurization tower includes two layers of activated carbon.
5. A carbon dioxide desulfurization device as described in claim 1, characterized in that, The desulfurizing agent is ferric oxide.