Two-stage rotating micro-droplet generator, system device including the generator and application

Abstract

The present invention discloses a two-stage rotating micro-droplet generator, a system device including the generator and an application thereof; the two-stage rotating micro-droplet generator includes a motor, a first-stage rotating micro-droplet generator, a second-stage rotating micro-droplet generator and a seal; the system device of the two-stage rotating micro-droplet generator includes a sulfur purification device and a carbon impurity purification device. The two-stage rotating micro-droplet generator has the advantages of small size, low investment and high efficiency, effectively saving the floor space of the sulfur-carbon treatment section, and is suitable for use in limited spaces such as offshore platforms; the two-stage rotating micro-droplet generator is used to couple hydrogen sulfide removal and solution regeneration in one device, realizing absorption and regeneration integration; the absorption of carbon dioxide and solution analysis are coupled in one device, realizing absorption and analysis integration. The present invention converts hydrogen sulfide in natural gas into sulfur and converts carbon dioxide into the raw material of sodium carbonate products, realizing in-situ efficient treatment and processing integration.

Description

Technical Field

[0001] The invention belongs to the technical field of sulfur and carbon purification of low-carbon hydrocarbons such as marine natural gas, and in particular relates to a two-stage rotating micro-droplet generator, a system device including the generator, and applications. Background Art

[0002] Low-carbon hydrocarbons are basic raw materials in the chemical industry, mainly including alkanes, alkenes, alkynes, etc. with carbon 1 to carbon 5. Common gases include natural gas, dry gas, liquefied gas and other mixtures. Taking natural gas as an example, its main component is methane, which is a clean, efficient, high-quality and relatively environmentally friendly energy. The advantages of natural gas as a clean energy are becoming increasingly prominent. The use of natural gas is of great significance for optimizing the energy structure, promoting energy conservation and emission reduction, and improving the atmospheric environment. In recent years, the global market demand for natural gas has shown a huge upward trend. Compared with the traditional land natural gas extraction, the extraction of marine natural gas has also attracted more and more attention, occupying an increasingly important position, and alleviating the problem of natural gas demand.

[0003] Natural gas usually contains high levels of sulfur and carbon impurities, mainly hydrogen sulfide and carbon dioxide. The presence of hydrogen sulfide will corrode pipelines and transportation equipment, and the presence of carbon dioxide will affect the combustion and quality of natural gas. Before the mined marine natural gas is transported to land for use, sulfur and carbon purification is an indispensable process. Limited by the limited space of the marine mining platform and the complex influence of ocean fluctuations, the traditional high-tower sulfur and carbon purification devices and processes used on land are not suitable for swaying marine platforms. In addition, in response to the global concept of sustainable development, the reuse of sulfur and carbon resources while purifying natural gas is also one of the key points to consider. Small size, low investment, high efficiency, natural gas sulfur and carbon purification devices that can effectively avoid the impact of marine platform fluctuations on the stability of the device's operation, and new processes that can reuse sulfur and carbon resources in a green way have always been the goals sought by the marine platform natural gas purification section. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a two-stage rotating micro-droplet generator; the generator has the advantages of small size, low investment and high efficiency, can effectively save the floor space of the sulfur-carbon treatment section, and is suitable for use in limited spaces such as offshore platforms.

[0005] The second technical problem to be solved by the present invention is to provide a system device including a two-stage rotating micro-droplet generator.

[0006] The third technical problem to be solved by the present invention is to provide an application of the above-mentioned system device in the purification of sulfur and carbon of low-carbon hydrocarbons such as marine natural gas.

[0007] In order to solve the above-mentioned first technical problem, the present invention adopts the following technical solution:

[0008] A two-stage rotating micro-droplet generator, comprising:

[0009] A motor, a first-stage rotating micro-droplet generator, and a second-stage rotating micro-droplet generator;

[0010] The output shaft of the motor penetrates from the bottom center of the second-stage rotating micro-droplet generator, passes out from the top, and then penetrates from the bottom center of the first-stage rotating micro-droplet generator into its inner cavity;

[0011] The first-stage rotating micro-droplet generator comprises a first housing, a first rotating disk, a first inner cavity, a first gas inlet, a first gas outlet, a first liquid inlet and a first liquid outlet;

[0012] The second-stage rotating micro-droplet generator comprises a second housing, a second rotating disk, a second inner cavity, a second gas inlet, a second gas outlet, a second liquid inlet and a second liquid outlet;

[0013] The second rotating disk is arranged in the second inner cavity, and the center of the second rotating disk is fixed on the output shaft of the motor; the first rotating disk is arranged in the first inner cavity, and the center of the first rotating disk is fixed together with the top end of the output shaft of the motor;

[0014] The first gas inlet is arranged at the top of the first shell, and the first gas outlet is arranged at the side wall of the first shell;

[0015] The second gas inlet is arranged on the side wall of the second shell, and the second gas outlet is arranged on the top of the second shell.

[0016] As a preferred implementation, seals are provided between the output shaft of the motor and both the first housing and the second housing.

[0017] As a preferred embodiment, the surface contact angles of the first rotating disk and the second rotating disk are set to 90-170°.

[0018] As a most preferred embodiment, the contact angles of the surfaces of the first rotating disk and the second rotating disk are 165°, thereby achieving a super-hydrophobic function.

[0019] To solve the above second technical problem, the present invention adopts the following technical solution:

[0020] A system device including a two-stage rotating micro-droplet generator, including a sulfur purification device and a carbon impurity purification device;

[0021] The sulfur purification device includes a first two-stage rotating micro-droplet generator, a liquid-solid separator, a first gas-liquid condensation separator, a solid product storage tank, a liquid buffer tank, a first centrifugal pump, a fan, a first valve and a flow meter;

[0022] The fan is connected to the second gas inlet of the first two-stage rotating micro-droplet generator through a pipeline;

[0023] The first liquid outlet of the first two-stage rotating micro-droplet generator is connected to the liquid-solid separator through a pipeline;

[0024] The liquid outlet of the liquid-solid separator is connected to the second liquid inlet of the first two-stage rotating micro-droplet generator through a pipeline; the solid outlet of the liquid-solid separator is connected to the solid product storage tank;

[0025] The second liquid outlet of the first two-stage rotating micro-droplet generator is connected to the liquid buffer tank through a pipeline;

[0026] The second gas outlet of the first two-stage rotating micro-droplet generator is connected to the first gas-liquid condensation separator through a pipeline;

[0027] The first gas-liquid condensation separator is connected to the liquid buffer tank through a pipeline;

[0028] The outlet of the liquid cache tank is connected to the first centrifugal pump through a pipeline;

[0029] The first centrifugal pump, the first valve and the first flow meter are connected through a pipeline and lead to a first liquid inlet of a first two-stage rotating micro-droplet generator;

[0030] The carbon impurity purification device includes a second two-stage rotating micro-droplet generator, a reboiler, a second centrifugal pump, a second valve, a second flow meter, a heat exchanger, a second gas-liquid condensation separator, a bubble tower reactor, a raw material storage device and a product drying storage device;

[0031] The first gas inlet of the second two-stage rotating micro-droplet generator is connected to the first gas outlet of the first two-stage rotating micro-droplet generator through a pipeline;

[0032] The first liquid outlet of the second two-stage rotating micro-droplet generator is connected to the heat exchanger through a pipeline, and the liquid outlet after heat exchange is connected to the second liquid inlet of the second two-stage rotating micro-droplet generator through a pipeline;

[0033] The second liquid outlet of the second two-stage rotating micro-droplet generator is connected to the reboiler through a pipeline;

[0034] An outlet of the reboiler is connected to a second gas inlet of a second two-stage rotating micro-droplet generator through a pipeline;

[0035] Another outlet of the reboiler is connected to a second centrifugal pump through a pipeline;

[0036] The second centrifugal pump, the second valve and the second flow meter are connected to the heat exchanger through a pipeline, and then the heat exchanger outlet is connected to the first liquid inlet of the second two-stage rotating micro-droplet generator through a pipeline;

[0037] The second gas outlet of the second two-stage rotating micro-droplet generator is connected to the second gas-liquid condensation separator through a pipeline;

[0038] The lower liquid outlet of the second gas-liquid condensation separator is connected to the reboiler through a pipeline;

[0039] The gas outlet of the second gas-liquid condensation separator is connected to the gas inlet of the bubble column reactor through a pipeline;

[0040] The raw material storage device is connected to the bubble column reactor through a pipeline;

[0041] The gas-liquid mixing outlet of the bubble column reactor is connected to the product drying storage device through a pipeline.

[0042] As an embodiment, a third centrifugal pump, a third valve and a third flow meter are provided on the pipeline between the raw material storage device and the bubble column reactor.

[0043] To solve the third technical problem mentioned above, the present invention adopts the following technical solution:

[0044] A method for purifying sulfur and carbon of low-carbon hydrocarbons such as marine natural gas by using the system device including the two-stage rotating micro-droplet generator, comprising the following steps:

[0045] S1. respectively start the two-stage rotating micro-droplet generator in the sulfur purification device and the carbon impurity purification device, as well as the liquid-solid separator, the reboiler, the first gas-liquid condensation separator and the second gas-liquid condensation separator;

[0046] S2. Start the first centrifugal pump in the sulfur purification device to send the complex iron solution in the liquid buffer tank to the first liquid inlet of the first two-stage rotating micro-droplet generator; the liquid at the first liquid outlet is sent to the liquid-solid separator; the liquid at the liquid outlet of the liquid-solid separator is sent to the second liquid inlet of the first two-stage micro-droplet generator, and contacts with air in the second inner cavity of the first two-stage micro-droplet generator, and then the liquid is sent back to the liquid buffer tank, so that the whole system first forms a liquid circuit circulation and forms a micro-droplet environment in the two-stage inner cavity;

[0047] S3, feeding the natural gas containing sulfur and carbon impurities into the first gas inlet of the first two-stage rotating micro-droplet generator in the sulfur purification device, detecting the hydrogen sulfide concentration at the first gas outlet of the first two-stage rotating micro-droplet generator, circulating and feeding it into the first gas inlet of the sulfur purification device for re-absorption before the concentration does not meet the standard, and feeding it into the first gas inlet of the carbon impurity purification device after the concentration meets the standard; feeding the solid sulfur separated in the liquid-solid separator into a solid product storage tank for storage;

[0048] S4, start the second delivery pump in the carbon impurity purification device to deliver the alcoholamine liquid in the reboiler to the first liquid inlet of the second two-stage rotating micro-droplet generator in the carbon impurity purification device; the liquid at the first liquid outlet of the second two-stage rotating micro-droplet generator is delivered to the second liquid inlet of the second two-stage micro-droplet generator after passing through the heat exchanger, exchanges heat with the hot steam in the second inner cavity of the second two-stage micro-droplet generator, and then flows into the reboiler, so that the whole system is first maintained at the temperature required for the reaction, and a micro-droplet environment is formed in the two-stage inner cavity;

[0049] S5, sending the desulfurized natural gas from the sulfur purification device to the first gas inlet of the second two-stage rotating micro-droplet generator in the carbon impurity purification device, and detecting the carbon dioxide concentration at the first gas outlet of the second two-stage rotating micro-droplet generator;

[0050] S6, sending the carbon dioxide gas at the second gas-liquid condensation separator into the bubbling tower reactor, and sending the sodium hydroxide liquid into the bubbling tower reactor through the third centrifugal pump, and sending the product at the outlet of the gas-liquid mixture into the product drying storage device;

[0051] S7. Test the purity of sodium carbonate in the product. If it does not meet the standard, it will be circulated into the bubble tower reactor through a centrifugal pump for use. After the product meets the standard, it will be sent to the next stage for drying and storage.

[0052] Any range described in the present invention includes the end value and any numerical value between the end values ​​and any sub-range formed by the end value or any numerical value between the end values.

[0053] Unless otherwise specified, all raw materials in the present invention can be purchased from the market, and the equipment used in the present invention can adopt conventional equipment in the relevant field or refer to the existing technology in the relevant field.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] 1) The purpose of the present invention is to overcome the existing defects and propose a sulfur-carbon purification device and resource recycling process for natural gas in limited spaces such as offshore platforms.

[0056] 2) The present invention utilizes the advantages of small size, low investment and high efficiency of the two-stage rotating micro-droplet generator, which can effectively save the floor space of the sulfur-carbon treatment section and is suitable for use in limited space on offshore platforms.

[0057] 3) The two-stage rotating micro-droplet generator used in the present invention utilizes the principle of high-speed rotation to form a centrifugal force environment inside to transform the liquid into micro-droplets. The centrifugal force environment can effectively avoid the influence of the stability of the marine platform caused by ocean fluctuations on the gas-liquid flow inside the device.

[0058] 4) The process proposed by the present invention utilizes a two-stage rotating micro-droplet generator to couple the removal of hydrogen sulfide and solution regeneration in the sulfur impurity purification section within one device, thereby realizing integrated absorption and regeneration; in the carbon impurity purification section, the absorption of carbon dioxide and solution analysis are coupled within one device, thereby realizing integrated absorption and analysis, achieving efficient utilization of the device and saving energy consumption.

[0059] 5) The process proposed by the present invention realizes the recycling of sulfur and carbon resources, and can convert hydrogen sulfide in natural gas into sulfur, and convert carbon dioxide into the raw material of sodium carbonate products, thereby realizing product production while purifying natural gas.

[0060] 6) The process proposed in the present invention realizes in-situ efficient treatment and processing integration, converting impurities in the gas into solid products, which is convenient for subsequent ship transportation, improves time utilization and also improves subsequent transportation efficiency.

[0061] 7) The present invention uses micro-droplets for gas absorption and liquid regeneration or analysis in the sulfur-carbon removal section, and uses micro-bubbles for product preparation in the carbon resource product chemical section. Combining the advantages of high effective interface area of ​​micro-droplets and micro-bubbles, the efficient operation of the entire system is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0063] Figure 1 It is a structural schematic diagram of a two-stage rotating micro-droplet generator of the present invention;

[0064] Figure 2 This is a schematic diagram of a system device for sulfur and carbon purification of marine natural gas according to the present invention;

[0065] Figure 3 It is a schematic diagram of the first and second rotating disks in the two-stage rotating micro-droplet generator of the present invention. DETAILED DESCRIPTION

[0066] In order to explain the present invention more clearly, the present invention is further described below in conjunction with preferred embodiments. It should be understood by those skilled in the art that the following specific description is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present invention.

[0067] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0068] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0070] At present, the extracted natural gas usually contains high sulfur and carbon impurities. The presence of hydrogen sulfide will corrode pipelines and transportation equipment, and the presence of carbon dioxide will affect the combustion and quality of natural gas. In particular, sulfur and carbon purification is an indispensable process before the extracted marine natural gas is transported to land for use. Due to the limited space of the marine mining platform and the complex influence of ocean waves, the traditional high-tower sulfur and carbon purification equipment and processes used on land are not suitable for the swaying marine platform.

[0071] As one aspect of the present invention, see Figure 1 As shown, a two-stage rotating micro-droplet generator 100 of the present invention comprises:

[0072] A motor 130, a first-stage rotating micro-droplet generator 110, and a second-stage rotating micro-droplet generator 120;

[0073] The output shaft 131 of the motor 130 penetrates from the bottom center of the second-stage rotating micro-droplet generator 120, passes out from the top, and then penetrates from the bottom center of the first-stage rotating micro-droplet generator 110 into its inner cavity;

[0074] The first-stage rotating micro-droplet generator 110 includes a first housing 111, a first rotating disk 112, a first inner cavity 113, a first gas inlet 114, a first gas outlet 115, a first liquid inlet 116 and a first liquid outlet 117;

[0075] The second-stage rotating micro-droplet generator 120 includes a second housing 121, a second rotating disk 122, a second inner cavity 123, a second gas inlet 124, a second gas outlet 125, a second liquid inlet 126 and a second liquid outlet 127;

[0076] The second rotating disk 122 is disposed in the second inner cavity 123, and the center of the second rotating disk 122 is fixed on the output shaft 131 of the motor 130; the first rotating disk 112 is disposed in the first inner cavity 113, and the center of the first rotating disk 112 is fixed to the top of the output shaft 131 of the motor 130;

[0077] The first gas inlet 114 is disposed on the top of the first shell 111 , and the first gas outlet 115 is disposed on the side wall of the first shell 111 ;

[0078] The second gas inlet 124 is disposed on a side wall of the second shell 121 , and the second gas outlet 125 is disposed on a top of the second shell 121 .

[0079] As an embodiment, a seal 132 is disposed between the output shaft 131 of the motor 130 and the first housing 111 and the second housing 121 .

[0080] As an embodiment, the surface contact angles of the first rotating disk 112 and the second rotating disk 122 are set to 90-170°.

[0081] As an embodiment, the contact angles of the surfaces of the first rotating disk and the second rotating disk are 165°, thereby achieving a super-hydrophobic function.

[0082] As another aspect of the present invention, see Figure 2 As shown, the present invention is a system device including a two-stage rotating micro-droplet generator, including a sulfur purification device and a carbon impurity purification device;

[0083] The sulfur purification device includes a first two-stage rotating micro-droplet generator 101, a liquid-solid separator 102, a first gas-liquid condensation separator 103, a solid product storage tank 104, a liquid buffer tank 105, a first centrifugal pump 106, a fan 107, a first valve 108 and a first flow meter 109;

[0084] The fan 107 is connected to the second gas inlet 124 of the first two-stage rotating micro-droplet generator 101 through a pipeline;

[0085] The first liquid outlet 117 of the first two-stage rotating micro-droplet generator 101 is connected to the liquid-solid separator 102 through a pipeline;

[0086] The liquid outlet of the liquid-solid separator 102 is connected to the second liquid inlet 126 of the first two-stage rotating micro-droplet generator 101 through a pipeline; the solid outlet of the liquid-solid separator 102 is connected to the solid product storage tank 104;

[0087] The second liquid outlet 127 of the first two-stage rotating micro-droplet generator 101 is connected to the liquid buffer tank 105 through a pipeline;

[0088] The second gas outlet 125 of the first two-stage rotating micro-droplet generator 101 is connected to the first gas-liquid condensation separator 103 through a pipeline;

[0089] The first gas-liquid condensation separator 103 is connected to the liquid buffer tank 105 through a pipeline;

[0090] The outlet of the liquid buffer tank 105 is connected to the first centrifugal pump 106 through a pipeline;

[0091] The first centrifugal pump 106, the first valve 108 and the first flow meter 109 are connected through a pipeline and lead to the first liquid inlet 116 of the first two-stage rotating micro-droplet generator 101;

[0092] The carbon impurity purification device includes a second two-stage rotating micro-droplet generator 201, a reboiler 202, a second centrifugal pump 203, a second valve 204, a second flow meter 205, a heat exchanger 206, a second gas-liquid condensation separator 207, a bubble tower reactor 208, a raw material storage device 209 and a product drying storage device 210;

[0093] The first gas inlet 114 of the second two-stage rotating micro-droplet generator 201 is connected to the first gas outlet 115 of the first two-stage rotating micro-droplet generator 101 through a pipeline;

[0094] The first liquid outlet 117 of the second two-stage rotating micro-droplet generator 201 is connected to the heat exchanger 206 through a pipeline, and the liquid outlet after heat exchange is connected to the second liquid inlet 126 of the second two-stage rotating micro-droplet generator 201 through a pipeline;

[0095] The second liquid outlet 127 of the second two-stage rotating micro-droplet generator 201 is connected to the reboiler 202 through a pipeline;

[0096] One outlet of the reboiler 202 is connected to the second gas inlet 124 of the second two-stage rotating micro-droplet generator 201 through a pipeline;

[0097] Another outlet of the reboiler 202 is connected to the second centrifugal pump 203 through a pipeline;

[0098] The second centrifugal pump 203, the second valve 204 and the second flow meter 205 are connected to the heat exchanger 206 through a pipeline, and then the outlet of the heat exchanger 206 is connected to the first liquid inlet 116 of the second two-stage rotating micro-droplet generator 201 through a pipeline;

[0099] The second gas outlet 125 of the second two-stage rotating micro-droplet generator 201 is connected to the second gas-liquid condensation separator 207 through a pipeline;

[0100] The lower liquid outlet of the second gas-liquid condensation separator 207 is connected to the reboiler 202 through a pipeline;

[0101] The gas outlet of the second gas-liquid condensation separator 207 is connected to the gas inlet of the bubble column reactor 208 through a pipeline;

[0102] The raw material storage device 209 is connected to the bubble column reactor 208 through a pipeline;

[0103] The gas-liquid mixture outlet of the bubble column reactor 208 is connected to the product drying storage device 210 through a pipeline.

[0104] As an example, see Figure 2 As shown, a third centrifugal pump 211 , a third valve 212 and a third flow meter 213 are provided on the pipeline between the raw material storage device 209 and the bubble column reactor 208 .

[0105] As an example, see Figure 2 As shown, the outlet and the inlet of the bubble column reactor 208 are connected by a pipeline, and a fourth centrifugal pump 214 and a fourth valve 215 are provided on the pipeline connecting the outlet and the inlet of the bubble column reactor 208.

[0106] As another aspect of the present invention, see Figure 2 As shown, a method for purifying sulfur and carbon in marine natural gas using the above-mentioned two-stage rotating micro-droplet generator system device comprises the following steps:

[0107] S1, respectively start the two-stage rotating micro-droplet generators 101 and 201 in the sulfur purification device and the carbon impurity purification device, as well as the liquid-solid separator 102, the reboiler 202, the first gas-liquid condensation separator 103 and the second gas-liquid condensation separator 207;

[0108] S2, start the first centrifugal pump 106 in the sulfur purification device, and send the complex iron solution in the liquid buffer tank 105 to the first liquid inlet 116 of the first two-stage rotating micro-droplet generator 101; the liquid at the first liquid outlet 117 is sent to the liquid-solid separator 102; the liquid at the liquid outlet of the liquid-solid separator 102 is sent to the second liquid inlet 126 of the first two-stage micro-droplet generator 101, and contacts with air in the second inner cavity 123 of the first two-stage micro-droplet generator 101, and then the liquid is sent back to the liquid buffer tank 105, so that the whole system first forms a liquid circuit circulation and forms a micro-droplet environment in the two-stage inner cavity;

[0109] S3, the natural gas containing sulfur and carbon impurities is fed into the first gas inlet 114 of the first two-stage rotating micro-droplet generator 101 in the sulfur purification device, the hydrogen sulfide concentration is detected at the first gas outlet 115 of the first two-stage rotating micro-droplet generator 101, and the concentration is circulated and fed into the first gas inlet 114 of the sulfur purification device before it reaches the standard, and then it is fed into the first gas inlet 114 of the second two-stage rotating micro-droplet generator 201 of the carbon impurity purification device after it reaches the standard; the solid sulfur separated in the liquid-solid separator 102 is fed into the solid product storage tank 104 for storage;

[0110] S4, start the second delivery pump 203 in the carbon impurity purification device to deliver the alcoholamine liquid in the reboiler 202 to the first liquid inlet 116 of the second two-stage rotating micro-droplet generator 201 in the carbon impurity purification device; the liquid at the first liquid outlet 117 of the second two-stage rotating micro-droplet generator 201 is delivered to the second liquid inlet 126 of the second two-stage micro-droplet generator 201 after passing through the heat exchanger 206, exchanges heat with hot steam in the second inner cavity 123 of the second two-stage micro-droplet generator 201, and then flows into the reboiler 202, so that the entire system is first maintained at the temperature required for the reaction, and a micro-droplet environment is formed in the two-stage inner cavity;

[0111] S5, sending the desulfurized natural gas from the sulfur purification device to the first gas inlet 114 of the second two-stage rotating micro-droplet generator 201 in the carbon impurity purification device, and detecting the carbon dioxide concentration at the first gas outlet 115 of the second two-stage rotating micro-droplet generator 201;

[0112] S6, sending the carbon dioxide gas at the second gas-liquid condenser separator 207 to the bubbling tower reactor 208, and sending the sodium hydroxide liquid into the bubbling tower reactor 208, and sending the product at the outlet of the gas-liquid mixture to the product drying storage device 210;

[0113] S7. The purity of the sodium carbonate product in the product is tested. Before the purity is below the standard, the product is circulated into the bubble tower reactor 208 through a centrifugal pump for use. After the product is up to standard, it is sent to the next stage for drying and storage.

[0114] The working principle of the present invention is:

[0115] The sulfur impurities in the marine natural gas are mainly hydrogen sulfide, which enters the inner cavity through the first gas inlet 114 of the first two-stage rotating micro-droplet generator 101 in the sulfur purification device; the complex iron solution is sent to the first rotating disk 112 through the first liquid inlet 116 and the liquid distributor, and the liquid forms micro-droplets at the edge of the first rotating disk 112 under the action of centrifugal force. The micro-droplets break away from the first rotating disk 112 and diffuse to the entire first inner cavity 113, and the gas and liquid are in intense contact in the first inner cavity 113 area to achieve absorption of hydrogen sulfide impurities in the marine natural gas, and then the gas and liquid are discharged from the first gas outlet 115 and the first liquid outlet 117 respectively, and the gas is sent to the carbon impurity purification device for carbon impurity purification;

[0116] After reacting with the complex iron solution, the gaseous hydrogen sulfide is converted into sulfur element, and a solid sulfur product is formed in the liquid; the liquid-solid mixture at the first liquid outlet 117 of the first-stage rotating micro-droplet generator 101 is sent to the liquid-solid separator 102 to separate the liquid from the solid sulfur product; the separated solid sulfur is sent to the product storage tank 104 for storage, and the liquid is sent to the second liquid inlet 126 and the liquid distributor of the first two-stage rotating micro-droplet generator 101, and micro-droplets are generated by the second rotating disk 122; the air from the fan 107 is controlled by the valve and the flow meter, and is sent to the second inner cavity 123 of the first two-stage micro-droplet generator 101, and in the second inner cavity 123, the air contacts the liquid film on the surface of the second rotating disk 122 and the micro-droplets of the complex iron solution, and the iron ions in the complex iron solution are oxidized and regenerated by the oxygen in the air;

[0117] The complex iron solution after oxidation regeneration is sent to the liquid buffer tank 105 through the second liquid outlet 127 of the first two-stage micro-droplet generator 101, and is sent to the first liquid inlet 116 of the first two-stage micro-droplet generator 101 for recycling after being controlled by the pump 106 through the valve 108 and the flow meter 109; a small amount of complex iron solution is mixed in the air at the second gas outlet 125 of the first two-stage micro-droplet generator 101, which is sent to the first gas-liquid condensation separator 103, and the condensed liquid is sent to the liquid buffer tank 105, and the air can be directly discharged;

[0118] The carbon impurities in the marine natural gas are mainly carbon dioxide; the gas from the sulfur purification device is sent to the second two-stage rotating micro-droplet generator 201 in the carbon impurity purification device; that is, the natural gas containing carbon impurities enters the first inner cavity 113 through the first gas inlet 114 of the second two-stage rotating micro-droplet generator 201 in the carbon impurity purification device, and the alcohol amine solution is sent to the first rotating disk 112 through the first liquid inlet 116 and the liquid distributor. Under the action of centrifugal force, the liquid forms micro-droplets at the edge of the first rotating disk 112, and the micro-droplets break away from the first rotating disk 112 and diffuse to the entire first inner cavity 113. The gas and liquid are in intense contact in the inner cavity area to achieve the absorption of carbon dioxide in the natural gas, and then the gas and liquid are discharged from the first gas outlet 115 and the first liquid outlet 117 respectively; the alcohol amine solution can be monoethanolamine, diethanolamine, methyldiethanolamine and their composite alcohol amine solutions;

[0119] The carbon-containing alcohol amine rich liquid is sent to the heat exchanger 206 from the first liquid outlet 117 of the second two-stage rotating micro-droplet generator 201 for preheating, and then sent to the second liquid inlet 126 and the liquid distributor of the second two-stage rotating micro-droplet generator 201 from the outlet of the heat exchanger 206, and micro-droplets are generated by the second rotating disk 122; the hot steam from the reboiler 202 is sent to the second inner cavity 123 of the second-stage micro-droplet generator 120 after being controlled by a valve and a flow meter, and heat is exchanged with the liquid film on the surface of the second rotating disk 122 and the micro-droplets of the alcohol amine rich liquid in the second inner cavity 123, and carbon dioxide is separated from the rich liquid by thermal analysis;

[0120] After the alcohol amine rich liquid is resolved, it becomes a lean liquid, which is sent to the reboiler 202 through the second liquid outlet 127 of the second two-stage micro-droplet generator 201. A part of it is converted into hot steam and sent to the second gas inlet 124 of the second two-stage micro-droplet generator 201. The other part is sent to the inside of the heat exchanger 206 as a heat source after being controlled by the pump 203 through the valve 204 and the flow meter 205. After heat exchange with the rich liquid from the previous stage, it is sent to the first liquid inlet 116 of the second two-stage micro-droplet generator 201 for recycling.

[0121] The lean liquid hot steam and the analyzed carbon dioxide are sent to the second gas-liquid condensation separator 207 through the second gas outlet 125 of the second two-stage micro-droplet generator 201, the condensed liquid is sent to the reboiler 202, and the carbon dioxide gas is sent to the bubble column reactor 208, and is converted into products through the raw material storage device 209 (storing liquid sodium hydroxide solution) and the product drying storage device 210;

[0122] The bubbling tower reactor 208 includes an aerated microbubble generator, a gas inlet, a liquid inlet, a gas-liquid mixed outlet, and a seal; the carbon dioxide gas from the second gas-liquid condensation separator 207 enters the interior of the aerated microbubble generator through the gas inlet of the bubbling tower reactor 208, and forms microbubbles on the surface of the aerated microbubble generator; liquid sodium hydroxide solution is sent into the interior of the bubbling tower reactor through the liquid inlet, reacts with carbon dioxide microbubbles, generates product sodium carbonate, and is sent to a product storage tank after drying.

[0123] Example 1

[0124] like Figure 1 As shown, the device and process are used for the purification and productization of sulfur and carbon in natural gas on a stable and non-fluctuating offshore platform. The specific steps are as follows:

[0125] Gas flow 1000m 3 / h, of which the volume fraction of hydrogen sulfide is 3% and the volume fraction of carbon dioxide is 5%. The liquid in the sulfur purification section is a complex iron solution with an effective iron ion concentration of 100 mol / m 3 ; The liquid in the carbon purification section is a 20% mass fraction of methyldiethanolamine solution. The disk diameter of the two-stage rotating micro-droplet generator in the sulfur-carbon purification section is 1000mm, and the speed is set to 800r / min. Then the liquid-solid separator, reboiler, gas-liquid condenser and separator are turned on. The liquid delivery pump in the sulfur purification device is started to transfer the complex iron solution in the liquid buffer tank at a speed of 30m 3 / h flow rate is sent to the liquid inlet of the first-stage rotating micro-droplet generator in the sulfur purification device; the liquid at the outlet of the first-stage micro-droplet generator is sent to the liquid inlet of the second-stage micro-droplet generator after passing through a liquid-solid separator, contacts with air in the inner cavity of the second-stage micro-droplet generator, and then is sent back to the liquid buffer tank, so that the entire system first forms a liquid circuit circulation and forms a micro-droplet environment in the two-stage inner cavity; the natural gas containing sulfur and carbon impurities is sent to the gas inlet of the first-stage rotating micro-droplet generator in the sulfur purification device, and the hydrogen sulfide concentration is detected at the gas outlet of the first-stage rotating micro-droplet generator. The content of hydrogen sulfide is less than 30ppm; the effective iron ion content in the liquid for absorbing hydrogen sulfide is detected at the liquid outlet of the second-stage rotating micro-droplet generator. 97mol / m 3 The solid sulfur separated from the liquid-solid separator is sent to the product storage tank for storage.

[0126] Add fresh methyldiethanolamine solution to the reboiler to reach the predetermined temperature of 120°. Start the liquid delivery pump in the carbon impurity purification device to pump the lean amine liquid in the reboiler at a rate of 50m 3 / h flow rate is sent to the liquid inlet of the first-stage rotating micro-droplet generator in the carbon impurity purification device; the liquid at the outlet of the first-stage micro-droplet generator is sent to the liquid inlet of the second-stage micro-droplet generator after passing through the heat exchanger, and heat is exchanged with hot steam in the inner cavity of the second-stage micro-droplet generator, and then flows into the reboiler, so that the entire system is first maintained at the temperature required for the reaction and a micro-droplet environment is formed in the two-stage inner cavity; the flow rate of the hot steam is set to 10m 3 / h.

[0127] The natural gas desulfurized in the previous stage was fed into the gas inlet of the first stage rotating micro-droplet generator in the carbon impurity purification device, and the carbon dioxide concentration was detected at the gas outlet of the first stage rotating micro-droplet generator, and the removal rate of carbon dioxide was 97%. The carbon dioxide content in the liquid was detected at the liquid outlet of the second stage rotating micro-droplet generator, and the resolution rate of carbon dioxide was 96%.

[0128] The carbon dioxide gas from the gas-liquid condenser and separator is fed into the bubbling tower reactor. At the same time, the sodium hydroxide liquid is fed into the bubbling tower reactor at a flow rate of 30L / h, and the product at the outlet of the gas-liquid mixture is fed into the liquid storage tank. The purity of the sodium carbonate product in the liquid storage tank meets the requirements and is sent to the next stage for drying and storage.

[0129] Example 2

[0130] On the basis of Example 1, the rotation speeds of the two-stage rotating micro-droplet generators were adjusted to 1200 r / min, and the hydrogen sulfide concentration was detected at the gas outlet of the first-stage rotating micro-droplet generator in the sulfur purification section. The content of hydrogen sulfide was less than 15 ppm, and the effective iron ion content in the liquid for absorbing hydrogen sulfide was detected at the liquid outlet of the second-stage rotating micro-droplet generator. 99 mol / m 3 The carbon dioxide concentration was detected at the gas outlet of the first-stage rotating micro-droplet generator in the carbon purification section, and the removal rate of carbon dioxide was 99%. The carbon dioxide content in the liquid was detected at the liquid outlet of the second-stage rotating micro-droplet generator, and the resolution rate of carbon dioxide was 98%.

[0131] Example 3

[0132] On the basis of Example 1, this device and process are used for the purification and productization of sulfur and carbon in natural gas on an offshore platform that is swaying under the influence of wind and waves. Affected by wind and waves, the swing amplitude of the entire device is 15° away from the center, with a period of 10s. Since a centrifugal force environment is formed inside the two-stage rotating micro-droplet generator, the influence of wind and wave swing on the gas-liquid flow inside the device is overcome. Under the operating conditions of Example 1, in the sulfur purification device, the hydrogen sulfide content detected at the gas outlet of the first-stage rotating micro-droplet generator is still 30ppm; the effective iron ion content in the liquid for absorbing hydrogen sulfide detected at the liquid outlet of the second-stage rotating micro-droplet generator is still 97mol / m 3 In the carbon impurity purification device, the removal rate of carbon dioxide at the gas outlet of the first-stage rotating micro-droplet generator is still 97%; at the liquid outlet of the second-stage rotating micro-droplet generator, the resolution rate of carbon dioxide is still 96%, and the sulfur and carbon purification of the entire section is not affected.

[0133] Example 4

[0134] See also Figure 3 As shown in the figure, on the basis of Example 2, super hydrophobic discs are used inside the two-stage rotating micro-droplet generator in the sulfur purification section, and the contact angle of the disc is 165°. The hydrogen sulfide concentration is detected at the gas outlet of the first-stage rotating micro-droplet generator in the sulfur purification section, and the content of hydrogen sulfide is 20ppm. The effective iron ion content in the liquid for absorbing hydrogen sulfide is detected at the liquid outlet of the second-stage rotating micro-droplet generator, which is 98mol / m 3 ; After running for 1000 hours, the micro-droplet generator was turned on, and the surface of the disc was still clean without sulfur agglomeration. A hydrophobic disc was used inside the two-stage rotating micro-droplet generator in the carbon purification section, and the contact angle of the disc was 135°. The carbon dioxide concentration was detected at the gas outlet of the first-stage rotating micro-droplet generator in the carbon purification section, and the removal rate of carbon dioxide was 98%. The carbon dioxide content in the liquid was detected at the liquid outlet of the second-stage rotating micro-droplet generator, and the resolution rate of carbon dioxide was 97%.

[0135] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A system device including a two-stage rotating micro-droplet generator, wherein the two-stage rotating micro-droplet generator includes a motor, a first-stage rotating micro-droplet generator, a second-stage rotating micro-droplet generator, and a seal; the output shaft of the motor penetrates from the bottom center of the second-stage rotating micro-droplet generator, passes out from the top, and then penetrates from the bottom center of the first-stage rotating micro-droplet generator into its inner cavity; the first-stage rotating micro-droplet generator includes a first shell, a first rotating disk, a first inner cavity, a first gas inlet, a first gas outlet, a first liquid inlet, and a first liquid outlet; the second-stage rotating micro-droplet generator includes a second shell, a second rotating disk, a second The invention relates to a housing having an inner cavity, a second gas inlet, a second gas outlet, a second liquid inlet and a second liquid outlet; the second rotating disk is arranged in the second inner cavity, and the center of the second rotating disk is fixed on the output shaft of the motor; the first rotating disk is arranged in the first inner cavity, and the center of the first rotating disk is fixed together with the top of the output shaft of the motor; the first gas inlet is arranged at the top of the first shell, and the first gas outlet is arranged on the side wall of the first shell; the second gas inlet is arranged on the side wall of the second shell, and the second gas outlet is arranged on the top of the second shell; the surface contact angle of the first rotating disk and the second rotating disk is set to 90-170°, characterized in that: The system devices include a sulfur purification device and a carbon impurity purification device; The sulfur purification device comprises a first two-stage rotating micro-droplet generator, a liquid-solid separator, a first gas-liquid condensation separator, a solid product storage tank, a liquid buffer tank, a first centrifugal pump, a fan, a first valve and a flow meter; the fan is connected to the second gas inlet of the first two-stage rotating micro-droplet generator through a pipeline; the first liquid outlet of the first two-stage rotating micro-droplet generator is connected to the liquid-solid separator through a pipeline; the liquid outlet of the liquid-solid separator is connected to the second liquid inlet of the first two-stage rotating micro-droplet generator through a pipeline; the solid outlet of the liquid-solid separator is connected to the solid product storage tank; the second liquid outlet of the first two-stage rotating micro-droplet generator is connected to the liquid buffer tank through a pipeline; the second gas outlet of the first two-stage rotating micro-droplet generator is connected to the first gas-liquid condensation separator through a pipeline; the first gas-liquid condensation ... The device is connected to a liquid buffer tank through a pipeline; the outlet of the liquid buffer tank is connected to a first centrifugal pump through a pipeline; the first centrifugal pump, the first valve and the first flow meter are connected through a pipeline and then lead to a first liquid inlet of a first two-stage rotating micro-droplet generator; the carbon impurity purification device includes a second two-stage rotating micro-droplet generator, a reboiler, a second centrifugal pump, a second valve, a second flow meter, a heat exchanger, a second gas-liquid condensation separator, a bubble tower reactor, a raw material storage device and a product drying storage device; the first gas inlet of the second two-stage rotating micro-droplet generator is connected to the first gas outlet of the first two-stage rotating micro-droplet generator through a pipeline; the first liquid outlet of the second two-stage rotating micro-droplet generator is connected to the heat exchanger through a pipeline, and the liquid outlet after heat exchange is connected to the second liquid inlet of the second two-stage rotating micro-droplet generator through a pipeline.

2. The system device according to claim 1, characterized in that: A sealing member is provided between the output shaft of the motor and the first shell and the second shell.

3. The system device according to claim 1, characterized in that: The contact angle between the surfaces of the first rotating disk and the second rotating disk is 165°.

4. The system device according to claim 1, characterized in that: The second liquid outlet of the second two-stage rotating micro-droplet generator is connected to the reboiler through a pipeline; one outlet of the reboiler is connected to the second gas inlet of the second two-stage rotating micro-droplet generator through a pipeline; the other outlet of the reboiler is connected to the second centrifugal pump through a pipeline; the second centrifugal pump, the second valve and the second flowmeter are connected to the heat exchanger through a pipeline, and then the heat exchanger outlet is connected to the first liquid inlet of the second two-stage rotating micro-droplet generator through a pipeline; the second gas outlet of the second two-stage rotating micro-droplet generator is connected to the second gas-liquid condensation separator through a pipeline; the lower liquid outlet of the second gas-liquid condensation separator is connected to the reboiler through a pipeline; the gas outlet of the second gas-liquid condensation separator is connected to the gas inlet of the bubble column reactor through a pipeline; the raw material storage device is connected to the bubble column reactor through a pipeline; the gas-liquid mixing outlet of the bubble column reactor is connected to the product drying storage device through a pipeline.

5. The system device according to claim 1, characterized in that: A third centrifugal pump, a third valve and a third flow meter are arranged on the pipeline between the raw material storage device and the bubble column reactor.

6. The system device according to claim 1, characterized in that: The bubble tower reactor adopts an aerated micro-bubble generator.

7. A method for purifying low-carbon hydrocarbon sulfur and carbon using the system device described in any one of claims 1 to 6, characterized in that: The steps include: S1. respectively start the two-stage rotating micro-droplet generator in the sulfur purification device and the carbon impurity purification device, as well as the liquid-solid separator, the reboiler, the first gas-liquid condensation separator and the second gas-liquid condensation separator; S2. Start the first centrifugal pump in the sulfur purification device to send the complex iron solution in the liquid buffer tank to the first liquid inlet of the first two-stage rotating micro-droplet generator; the liquid at the first liquid outlet is sent to the liquid-solid separator; the liquid at the liquid outlet of the liquid-solid separator is sent to the second liquid inlet of the first two-stage micro-droplet generator, and contacts with air in the second inner cavity of the first two-stage micro-droplet generator, and then the liquid is sent back to the liquid buffer tank, so that the whole system first forms a liquid circuit circulation and forms a micro-droplet environment in the two-stage inner cavity; S3, feeding the natural gas containing sulfur and carbon impurities into the first gas inlet of the first two-stage rotating micro-droplet generator in the sulfur purification device, detecting the hydrogen sulfide concentration at the first gas outlet of the first two-stage rotating micro-droplet generator, circulating and feeding it into the first gas inlet of the sulfur purification device for re-absorption before the concentration does not meet the standard, and feeding it into the first gas inlet of the carbon impurity purification device after the concentration meets the standard; feeding the solid sulfur separated in the liquid-solid separator into a solid product storage tank for storage; S4, start the second delivery pump in the carbon impurity purification device to deliver the alcohol amine solution in the reboiler to the first liquid inlet of the second two-stage rotating micro-droplet generator in the carbon impurity purification device; the liquid at the first liquid outlet of the second two-stage rotating micro-droplet generator is delivered to the second liquid inlet of the second two-stage micro-droplet generator after passing through the heat exchanger, exchanges heat with the hot steam in the second inner cavity of the second two-stage micro-droplet generator, and then flows into the reboiler, so that the whole system is first maintained at the temperature required for the reaction, and a micro-droplet environment is formed in the two-stage inner cavity; S5, sending the desulfurized natural gas from the sulfur purification device to the first gas inlet of the second two-stage rotating micro-droplet generator in the carbon impurity purification device, and detecting the carbon dioxide concentration at the first gas outlet of the second two-stage rotating micro-droplet generator; S6, sending the carbon dioxide gas at the second gas-liquid condensation separator into the bubbling tower reactor, and sending the sodium hydroxide liquid into the bubbling tower reactor, and sending the product at the outlet of the gas-liquid mixture into the product drying storage device; S7. Check the purity of sodium carbonate in the product. If it does not meet the standard, it will be circulated into the bubble tower reactor through the third centrifugal pump for use. After the product meets the standard, it will be sent to the next stage for drying and storage.

8. The method according to claim 7, characterized in that: In step S2, the complex iron solution is a composite solvent containing iron ions, and also includes a sulfur agglomerator and a foaming agent.

9. The method according to claim 7, characterized in that: In step S4, the alcoholamine solution is selected from one or more of monoethanolamine, diethanolamine, and methyldiethanolamine.

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