Desulfurized feed gas high purity food grade processing system

Abstract

The utility model relates to desulfurization raw material gas processing related technical field especially desulfurization raw material gas high -purity food -grade processing system, including mounting panel, the surface one side of mounting panel is provided with oxygen gas mixing subassembly, the one side intercommunication of oxygen gas mixing subassembly has drying assembly, the other side intercommunication of drying assembly has primary liquefaction subassembly, the other side intercommunication of primary liquefaction subassembly has rectification liquefaction subassembly, the other side intercommunication of rectification liquefaction subassembly has storage discharge component. This desulfurization raw material gas high -purity food -grade processing system, the device passes through oxygen gas mixing subassembly and mixes raw material gas with oxygen and removes hydrocarbon, then after water cooler cooling enters drying assembly dehydration, and the gas after drying passes through primary liquefaction subassembly precooling, rectification liquefaction subassembly deep -cold purification in proper order, obtains high -purity food -grade liquid carbon dioxide finally, and realizes gas high -purity purification and food -grade liquefaction treatment through the storage discharge component storage or non -condensable tail gas discharge.

Description

Technical Field

[0001] This utility model relates to the technical field of desulfurization feed gas treatment, and in particular to a high-purity food-grade desulfurization feed gas treatment system. Background Technology

[0002] Desulfurization feed gas treatment refers to the process of removing sulfides and related impurities from feed gas through physical, chemical or catalytic methods to prevent sulfides from corroding downstream equipment and polluting the environment, improve gas purity and utilization value, and ensure the safety and stability of subsequent processing or use. Therefore, a high-purity food-grade desulfurization feed gas treatment system is particularly needed.

[0003] However, in existing carbon dioxide purification systems, hydrocarbons, impurities, and moisture contained in the raw gas can affect product purity. Furthermore, the cooling, drying, and distillation processes are dispersed, resulting in low energy efficiency and difficulty in efficiently producing food-grade liquid carbon dioxide. These systems also present technical problems such as complex operation, high energy consumption, and difficulty in maintaining stable purity control. Utility Model Content

[0004] The purpose of this invention is to provide a high-purity food-grade desulfurization feed gas treatment system to solve the technical problems mentioned in the background art, such as hydrocarbons, impurities and moisture contained in the feed gas affecting product purity, and the dispersed cooling, drying and distillation processes resulting in low energy efficiency and difficulty in efficiently producing food-grade liquid carbon dioxide. These problems include complex operation, high energy consumption and difficulty in stable purity control.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-purity food-grade desulfurization raw gas treatment system, comprising an installation plate, an oxygen mixing component, a drying component, a primary liquefaction component, a distillation liquefaction component, and a storage and discharge component. An oxygen mixing component is disposed on one side of the surface of the installation plate. A drying component is connected to one side of the oxygen mixing component. A primary liquefaction component is connected to the other side of the drying component. A distillation liquefaction component is connected to the other side of the primary liquefaction component. A storage and discharge component is connected to the other side of the distillation liquefaction component.

[0006] Preferably, the oxygen mixing assembly includes a mixing tank, an oxygen inlet pipe, a discharge port, a dehydrogenation reactor, a dehydrogenation water cooler, and a first connecting pipe. The mixing tank is mounted on the surface of the mounting plate, the oxygen inlet pipe is mounted on the top of the mixing tank, the discharge port is opened at the bottom of the side wall of the mixing tank, the dehydrogenation reactor is installed inside the mixing tank, the dehydrogenation water cooler is installed inside the mixing tank, and the first connecting pipe is installed on the outer edge of the discharge port.

[0007] Preferably, the dehydrogenation reactor is located above the dehydrogenation water cooler, and the discharge port is located below the dehydrogenation water cooler.

[0008] Preferably, the drying assembly includes a drying tank, a mounting frame, an air outlet, a desiccant, and a vacuum pump. The drying tank is connected to the other side of the first connecting pipe. The mounting frame is installed on the side surface of the drying tank. An air outlet is opened at the top of the drying tank. The desiccant is installed inside the mounting frame. A vacuum pump is installed on the other side of the air outlet.

[0009] Preferably, the mounting frame is provided in two sets, the desiccant is matched with the inner wall size of the drying tank, and the first connecting pipe is connected to the lower side wall of the drying tank.

[0010] Preferably, the primary liquefaction component includes a first liquefaction tank, a Freon refrigeration component, and an outlet pipe. The other side of the vacuum pump is connected to the first liquefaction tank. The Freon refrigeration component is installed inside the first liquefaction tank, and an outlet pipe is installed on the other side of the top of the first liquefaction tank.

[0011] Preferably, the distillation and liquefaction assembly includes a second liquefaction tank and a cryogenic liquefaction distillation assembly, with the other side of the outlet pipe connected to the second liquefaction tank, and the cryogenic liquefaction distillation assembly installed inside the second liquefaction tank.

[0012] Preferably, the storage discharge assembly includes a discharge pipe, a food-grade cooling assembly, a high-altitude discharge pipe, and a waste heat recovery device. The discharge pipe is connected to the lower side wall of the second liquefaction tank. A food-grade cooling assembly is installed on one side of the surface of the discharge pipe, and a high-altitude discharge pipe is fixedly connected to the other end of the discharge pipe. A waste heat recovery device is installed on the surface of the high-altitude discharge pipe.

[0013] Preferably, the main bodies of the drying tank, the first liquefaction tank, and the second liquefaction tank are all supported on the mounting plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the desulfurization raw gas high-purity food-grade treatment system, through the coordinated arrangement of various components, integrates modules such as oxygen mixing, dehydrocarbonization, drying, liquefaction and distillation, with a compact process, high energy efficiency, and can efficiently remove impurities and moisture, stably produce high-purity food-grade liquid carbon dioxide, while waste heat recovery improves energy utilization and makes the system operation more efficient and environmentally friendly. Attached Figure Description

[0015] Figure 1 This is a side view of the appearance structure of this utility model; Figure 2 This is a cross-sectional side view of each component of this utility model; Figure 3 This is a cross-sectional side view of the exploded structure of some parts of the oxygen mixing assembly of this utility model; Figure 4 This is a cross-sectional exploded side view of some parts of the drying assembly of this utility model; Figure 5 This is a cross-sectional exploded side view of some parts of the primary liquefaction component of this utility model; Figure 6 This is a cross-sectional side view of the exploded structure of some parts of the distillation and liquefaction assembly of this utility model; Figure 7 This is a side view of some parts of the storage and discharging assembly of this utility model.

[0016] In the diagram: 1. Mounting plate; 2. Oxygen mixing assembly; 201. Mixing tank; 202. Oxygen inlet pipe; 203. Discharge port; 204. Dehydrocarbonization reactor; 205. Dehydrocarbonization water cooler; 206. First connecting pipe; 3. Drying assembly; 301. Drying tank; 302. Mounting frame; 303. Gas outlet; 304. Desiccant; 305. Vacuum pump; 4. Primary liquefaction assembly; 401. First liquefaction tank; 402. Freon refrigeration assembly; 403. Gas outlet pipe; 5. Distillation liquefaction assembly; 501. Second liquefaction tank; 502. Cryogenic liquefaction distillation assembly; 6. Storage and discharge assembly; 601. Discharge pipe; 602. Food-grade cooling assembly; 603. High-altitude discharge pipe; 604. Waste heat recovery unit. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-7 This utility model provides a technical solution: a high-purity food-grade desulfurization raw gas treatment system, including an installation plate 1, an oxygen mixing component 2, a drying component 3, a primary liquefaction component 4, a distillation liquefaction component 5, and a storage and discharge component 6. The oxygen mixing component 2 is disposed on one side of the surface of the installation plate 1. The drying component 3 is connected to one side of the oxygen mixing component 2. The primary liquefaction component 4 is connected to the other side of the drying component 3. The distillation liquefaction component 5 is connected to the other side of the distillation liquefaction component 5. The storage and discharge component 6 is connected to the other side of the distillation liquefaction component 5. Through the arrangement of the installation plate 1, oxygen mixing component 2, drying component 3, primary liquefaction component 4, distillation liquefaction component 5, and storage and discharge component 6, the device mixes the raw gas with oxygen and removes hydrocarbons through the oxygen mixing component 2. After cooling by a water cooler, the gas enters the drying component 3 for dehydration. After drying, the gas sequentially passes through the primary liquefaction component 4 for pre-cooling and the distillation liquefaction component 5 for deep cryogenic purification, ultimately obtaining high-purity food-grade liquid carbon dioxide. The non-condensable tail gas is stored or discharged through the storage and discharge component 6, achieving high-purity gas purification and food-grade liquefaction treatment.

[0019] Furthermore, the oxygen mixing assembly 2 includes a mixing tank 201, an oxygen inlet pipe 202, a discharge port 203, a dehydrogenation reactor 204, a dehydrogenation water cooler 205, and a first connecting pipe 206. The mixing tank 201 is mounted on the surface of the mounting plate 1. The oxygen inlet pipe 202 is mounted on the top of the mixing tank 201. The discharge port 203 is opened at the bottom of the side wall of the mixing tank 201. The dehydrogenation reactor 204 and the dehydrogenation water cooler 205 are installed inside the mixing tank 201. The first connecting pipe 206 is installed on the outer edge of the discharge port 203. Through the arrangement of the mixing tank 201, the oxygen inlet pipe 202, the discharge port 203, the dehydrogenation reactor 204, the dehydrogenation water cooler 205, and the first connecting pipe 206. Oxygen mixing assembly 2 introduces oxygen into mixing tank 201 through oxygen inlet pipe 202. After being fully mixed with raw material gas, oxygen undergoes catalytic reaction in dehydrogenation reactor 204, converting combustible components into water and carbon dioxide. Subsequently, the gas is cooled and condensed by dehydrogenation water cooler 205. The reacted gas is sent to drying assembly 3 through outlet 203 and first connecting pipe 206 to complete the front-end purification treatment.

[0020] Furthermore, the dehydrogenation reactor 204 is positioned above the dehydrogenation water cooler 205, and the discharge port 203 is positioned below the dehydrogenation water cooler 205.

[0021] Furthermore, the drying assembly 3 includes a drying tank 301, a mounting frame 302, an outlet 303, a desiccant 304, and a vacuum pump 305. The drying tank 301 is connected to the other side of the first connecting pipe 206. The mounting frame 302 is installed on the side surface of the drying tank 301. An outlet 303 is opened at the top of the drying tank 301. The desiccant 304 is installed inside the mounting frame 302. The vacuum pump 305 is installed on the other side of the outlet 303. Through the arrangement of the drying tank 301, the mounting frame 302, the outlet 303, the desiccant 304, and the vacuum pump 305, the drying assembly 3 is used in this device to further dehydrate the gas after dehydrogenation and cooling. The desiccant 304 in the drying tank 301 adsorbs moisture, reducing the water content of the gas to less than five ppm, preventing freezing or efficiency reduction in subsequent liquefaction and distillation processes. The dried gas is then transported to the first-stage liquefaction assembly 4 by the vacuum pump 305.

[0022] Furthermore, the mounting frame 302 is provided with two sets, the desiccant 304 matches the inner wall size of the drying tank 301, and the first connecting pipe 206 is connected to the lower side of the side wall of the drying tank 301.

[0023] Furthermore, the primary liquefaction component 4 includes a first liquefaction tank 401, a Freon refrigeration component 402, and an outlet pipe 403. The other side of the vacuum pump 305 is connected to the first liquefaction tank 401. The Freon refrigeration component 402 is installed inside the first liquefaction tank 401, and the outlet pipe 403 is installed on the other side of the top of the first liquefaction tank 401. Through the arrangement of the first liquefaction tank 401, the Freon refrigeration component 402, and the outlet pipe 403, the primary liquefaction component 4 cools the dried gas to -20 degrees Celsius through the Freon refrigeration component 402 in the first liquefaction tank 401, so that some gas components are pre-liquefied, reducing the gas temperature and volume, and improving the separation efficiency and purity of the subsequent distillation liquefaction component 5. At the same time, the unliquefied part is sent to the distillation system for further processing through the outlet pipe 403.

[0024] Furthermore, the distillation and liquefaction assembly 5 includes a second liquefaction tank 501 and a cryogenic liquefaction distillation assembly 502. The other side of the gas outlet pipe 403 is connected to the second liquefaction tank 501. The cryogenic liquefaction distillation assembly 502 is installed inside the second liquefaction tank 501. Through the arrangement of the second liquefaction tank 501 and the cryogenic liquefaction distillation assembly 502, the distillation and liquefaction assembly 5 deeply cools the gas to below -25 degrees Celsius, thereby achieving the separation of non-condensable impurities and the high-purity extraction of carbon dioxide. This ensures that the produced liquid carbon dioxide meets the food-grade purity requirements, and the pure liquid is transported to the storage and discharge assembly 6, while the non-condensable gas is discharged into the tail gas system.

[0025] Furthermore, the storage discharge assembly 6 includes a discharge pipe 601, a food-grade cooling assembly 602, a high-altitude discharge pipe 603, and a waste heat recovery unit 604. The discharge pipe 601 is connected to the lower side wall of the second liquefaction tank 501. The food-grade cooling assembly 602 is installed on one side of the surface of the discharge pipe 601, and the high-altitude discharge pipe 603 is fixedly connected to the other end of the discharge pipe 601. The waste heat recovery unit 604 is installed on the surface of the high-altitude discharge pipe 603. Through the arrangement of the discharge pipe 601, the food-grade cooling assembly 602, the high-altitude discharge pipe 603, and the waste heat recovery unit 604, the storage discharge assembly 6 outputs the liquid carbon dioxide obtained by distillation through the discharge pipe 601. The food-grade cooling assembly 602 further cools it to -25 degrees Celsius before sending it into the storage tank for storage to ensure product stability. At the same time, the high-altitude discharge pipe 603 discharges the non-condensable tail gas generated in the system, and the waste heat recovery unit 604 recovers the cold energy of the tail gas to improve the system energy efficiency.

[0026] Furthermore, the main bodies of the drying tank 301, the first liquefaction tank 401, and the second liquefaction tank 501 are all supported on the mounting plate 1.

[0027] Working principle: The raw material gas and an appropriate amount of oxygen are mixed through the mixing tank 201 installed on the mounting plate 1. Oxygen is introduced through the oxygen inlet pipe 202 at the top. The mixing tank 201 is equipped with a dehydrogenation reactor 204 and a dehydrogenation water cooler 205 below it. The mixed gas undergoes a catalytic oxidation reaction in the reactor, converting the combustible components (such as hydrocarbons) in the raw gas into carbon dioxide and water. After the reaction, the high-temperature gas is discharged through the outlet 203 at the bottom and sent to the next unit through the first connecting pipe 206. The gas sent in through the first connecting pipe 206 enters the drying tank 301. Two sets of mounting frames 302 are installed on the side of the tank. The inside is filled with a desiccant 304 (such as molecular sieve) that fits tightly against the tank body to further adsorb moisture to less than five ppm. The top outlet 303 is connected to a vacuum pump 305 to extract the dried gas and send it to the downstream liquefaction system. The dried gas enters the first liquefaction tank 401. The tank is equipped with a Freon refrigeration component 402, which uses R507 refrigerant to cool the gas to below -20 degrees Celsius, so that some of the components are pre-liquefied, improving the efficiency of subsequent distillation. The treated gas is output from the outlet pipe 403 at the top of the liquefaction tank. The outlet pipe 403 is connected to the second liquefaction tank 501, which is equipped with a cryogenic liquefaction distillation component 502 for further cooling to below -25 degrees Celsius for cold distillation. This step effectively removes non-condensable impurities, ensuring that the purity of the produced liquid carbon dioxide meets food-grade standards. During this process, carbon dioxide is liquefied and output from the bottom of the tower. High-purity liquid carbon dioxide is output from the lower part of the second liquefaction tank 501 through the discharge pipe 601. The outside of the discharge pipe 601 is equipped with a food-grade cooling component 602 to further subcool the liquid to -25 degrees Celsius to prevent flash evaporation. The exhaust gas is discharged through a fixedly connected high-altitude exhaust pipe 603. The exhaust pipe is equipped with a residual heat recovery device 604 to recover the cold energy of the low-temperature exhaust gas, improving the overall system energy efficiency. Some non-condensable gases can also be reused as a regeneration gas source for the dryer.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-purity food-grade desulfurization feed gas treatment system, comprising an installation plate (1), an oxygen mixing assembly (2), a drying assembly (3), a primary liquefaction assembly (4), a distillation liquefaction assembly (5), and a storage and discharge assembly (6), characterized in that: An oxygen mixing assembly (2) is provided on one side of the surface of the mounting plate (1). A drying assembly (3) is connected to one side of the oxygen mixing assembly (2). A primary liquefaction assembly (4) is connected to the other side of the drying assembly (3). A distillation liquefaction assembly (5) is connected to the other side of the distillation liquefaction assembly (5). A storage discharge assembly (6) is connected to the other side of the distillation liquefaction assembly (5).

2. The high-purity food-grade desulfurization feed gas treatment system according to claim 1, characterized in that: The oxygen mixing assembly (2) includes a mixing tank (201), an oxygen inlet pipe (202), a discharge port (203), a dehydrogenation reactor (204), a dehydrogenation water cooler (205), and a first connecting pipe (206). The mixing tank (201) is mounted on the surface of the mounting plate (1). The oxygen inlet pipe (202) is mounted on the top of the mixing tank (201). The discharge port (203) is opened at the bottom of the side wall of the mixing tank (201). The dehydrogenation reactor (204) is installed inside the mixing tank (201). The dehydrogenation water cooler (205) is installed inside the mixing tank (201). The first connecting pipe (206) is installed on the outer edge of the discharge port (203).

3. The high-purity food-grade desulfurization feed gas treatment system according to claim 2, characterized in that: The dehydrogenation reactor (204) is located above the dehydrogenation water cooler (205), and the discharge port (203) is located below the dehydrogenation water cooler (205).

4. The high-purity food-grade desulfurization feed gas treatment system according to claim 2, characterized in that: The drying assembly (3) includes a drying tank (301), a mounting frame (302), an air outlet (303), a desiccant (304), and a vacuum pump (305). The drying tank (301) is connected to the other side of the first connecting pipe (206). The mounting frame (302) is installed on the side surface of the drying tank (301). An air outlet (303) is opened at the top of the drying tank (301). The desiccant (304) is installed inside the mounting frame (302). A vacuum pump (305) is installed on the other side of the air outlet (303).

5. The high-purity food-grade desulfurization feed gas treatment system according to claim 4, characterized in that: The mounting frame (302) is provided in two sets, the desiccant (304) matches the inner wall size of the drying tank (301), and the first connecting pipe (206) is connected to the lower side of the side wall of the drying tank (301).

6. The high-purity food-grade desulfurization feed gas treatment system according to claim 4, characterized in that: The first-stage liquefaction component (4) includes a first liquefaction tank (401), a Freon refrigeration component (402), and an outlet pipe (403). The other side of the vacuum pump (305) is connected to the first liquefaction tank (401). The Freon refrigeration component (402) is installed inside the first liquefaction tank (401), and the outlet pipe (403) is installed on the other side of the top of the first liquefaction tank (401).

7. The high-purity food-grade desulfurization feed gas treatment system according to claim 6, characterized in that: The distillation and liquefaction assembly (5) includes a second liquefaction tank (501) and a cryogenic liquefaction distillation assembly (502). The other side of the gas outlet pipe (403) is connected to the second liquefaction tank (501), and the cryogenic liquefaction distillation assembly (502) is installed inside the second liquefaction tank (501).

8. The high-purity food-grade desulfurization feed gas treatment system according to claim 7, characterized in that: The storage discharge assembly (6) includes a discharge pipe (601), a food-grade cooling assembly (602), a high-altitude discharge pipe (603), and a waste heat recovery device (604). The discharge pipe (601) is connected to the lower side wall of the second liquefaction tank (501). A food-grade cooling assembly (602) is installed on one side of the surface of the discharge pipe (601), and a high-altitude discharge pipe (603) is fixedly connected to the other end of the discharge pipe (601). A waste heat recovery device (604) is installed on the surface of the high-altitude discharge pipe (603).

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