An oxygen-enriched supply device

Abstract

The utility model relates to a kind of oxygen-rich gas supply device, including main heat exchanger, and product oxygen delivery main pipe is provided on main heat exchanger and compressed air delivery main pipe, and compressed air delivery main pipe is provided with first air delivery branch pipe, and second regulating valve is provided on product oxygen delivery main pipe, and product oxygen delivery branch pipe is provided on product oxygen delivery main pipe, and third regulating valve, first gas flow sensor, gas mixer and auxiliary heat exchanger are provided on product oxygen delivery branch pipe, the gas mixer includes first jar body, gas distribution branch pipe, nucleus and helical blade, second gas flow sensor is provided on first air delivery branch pipe, first jar body and product oxygen delivery branch pipe are communicated, gas distribution branch pipe and first air delivery branch pipe are communicated, and auxiliary heat exchanger is communicated with high-pressure steam delivery main pipe.The oxygen-rich gas that can be conveniently provided for gasification furnace temperature and oxygen content are both suitable.The utility model is convenient to use, with wide market prospect.

Description

Technical Field

[0001] This utility model relates to the field of oxygen-enriched supply equipment, and specifically to an oxygen-enriched supply device. Background Technology

[0002] Hydrogen energy is a widely applicable and abundant carbon-free energy source, an important component of my country's energy structure, a key development direction for strategic emerging industries and future industries, and is gradually becoming an important carrier for global green and low-carbon energy transformation. It has rich application scenarios in transportation, construction, metallurgy, power, chemicals, and many other fields. Hydrogen transportation methods include dedicated hydrogen pipeline transportation, natural gas-blended hydrogen pipeline transportation, compressed hydrogen transportation, liquid organic hydrogen storage transportation, alloy hydrogen storage transportation, and liquid hydrogen transportation. The cost of hydrogen transportation is closely related to the storage and transportation distance and the amount transported. Hydrogen is further used to synthesize hydrogen-containing compounds such as ammonia, methanol, and aviation kerosene. These hydrogen-containing compounds are easy to store and have low storage and transportation costs. Based on carbon emissions, ammonia synthesis can be divided into gray ammonia, blue ammonia, and green ammonia. Gray ammonia refers to ammonia synthesized from hydrogen and nitrogen generated from coal chemical or natural gas reforming; blue ammonia refers to ammonia synthesized from CO2 produced by capturing and further utilizing or storing it to reduce carbon emissions during ammonia synthesis; green ammonia refers to ammonia synthesized from hydrogen and nitrogen produced by electrolyzing water using renewable energy power generation. The main steps of biomass gasification technology include feedstock pretreatment, gasification, and product collection. In the feedstock pretreatment stage, the biomass feedstock is crushed and dried to improve its gasification efficiency. During gasification, the biomass is subjected to high temperatures in the gasifier, undergoing a series of chemical reactions such as pyrolysis, oxidation, and reduction to generate biomass gas. Finally, a purification system removes impurities from the biomass gas, yielding clean combustible gas.

[0003] Qualified biomass pellets are fed into a gasifier where they react with oxygen from an air separation unit to produce oxygen-enriched steam. Inside the gasifier, the steam reacts with the biomass to generate crude syngas. This crude syngas is then modified to form hydrogen, which is then mixed with nitrogen to form refined syngas, which is then sent to a synthesis tower for ammonia synthesis. However, there are still areas for improvement in the existing technology. This is because the temperature of the various finished gases supplied by the air separation system is relatively low during the process of delivering the oxygen-enriched steam to the gasifier. The oxygen-enriched gas, upon arrival at the gasifier, must undergo a heating process, causing it to expand. While existing technology can calculate the amount of oxygen-enriched gas to be delivered to the gasifier, more objective factors need to be considered in actual operation. For example, if the oxygen-enriched gas is at a low temperature, more energy is required to maintain the temperature inside the gasifier. If the system experiences fluctuations, substandard syngas can easily be produced. Therefore, there is room for improvement in the existing technology, which aims to solve the problem that the low temperature of the oxygen-enriched gas entering the gasifier requires heat absorption, thus affecting the gasifier's reaction temperature. Furthermore, the oxygen-enriched gas entering the gasifier needs to be corrected to obtain the actual required amount. It also aims to reduce the impact of the low temperature of the oxygen-enriched gas supplied to the gasifier on the gasifier's operating status. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides an oxygen-enriched supply device that can easily provide oxygen-enriched gas with suitable temperature and oxygen content to a gasifier, thereby overcoming the deficiencies in existing technologies.

[0005] The technical solution adopted by this utility model is as follows: an oxygen-enriched supply device, including a main heat exchanger, on which a finished oxygen delivery main pipe and a compressed air delivery main pipe are provided. The inlet end of the compressed air delivery main pipe between the inlet end of the compressed air delivery main pipe and the main heat exchanger is provided with the inlet end of a first air delivery branch pipe. A first regulating valve is respectively provided on both the compressed air delivery main pipe between the first air delivery branch pipe and the main heat exchanger, and on the first air delivery branch pipe. A second regulating valve is provided on the finished oxygen delivery main pipe between the outlet end of the finished oxygen delivery main pipe and the main heat exchanger. A second regulating valve is provided on the finished oxygen delivery main pipe between the second regulating valve and the main heat exchanger. A finished oxygen delivery branch pipe is provided. Along the direction from near the finished oxygen delivery main pipe to far away from the finished oxygen delivery main pipe, a third regulating valve, a first gas flow sensor, a gas mixer, and a cold source channel for an auxiliary heat exchanger are arranged in sequence. The gas mixer includes a first tank and a gas distribution branch pipe, a cone, and a spiral blade arranged in sequence along the direction from the inlet end to the outlet end of the first tank. A second gas flow sensor is provided on the first air delivery branch pipe. The first tank and the finished oxygen delivery branch pipe are connected, and the gas distribution branch pipe and the first air delivery branch pipe are connected. The heat source channel of the auxiliary heat exchanger is connected to a high-pressure steam delivery main pipe.

[0006] Preferably, the high-pressure steam transmission main pipe is provided with an inlet end of a high-pressure steam transmission branch pipe, the outlet end of the high-pressure steam transmission branch pipe is connected to the inlet end of the heat source channel of the auxiliary heat exchanger, and a fourth regulating valve is provided on the high-pressure steam transmission main pipe and the high-pressure steam transmission branch pipe, respectively, between the outlet end of the high-pressure steam transmission main pipe and the high-pressure steam transmission branch pipe.

[0007] Preferably, the outlet end of the heat source channel of the auxiliary heat exchanger is provided with the inlet end of the mixed gas conveying pipe, and the outlet end of the mixed gas conveying pipe is provided with a gas-liquid separator. The gas-liquid separator includes a second tank body and a wire mesh coalescer installed inside the second tank body. The second tank body below the wire mesh coalescer is connected to the outlet end of the mixed gas conveying pipe. The second tank body above the wire mesh coalescer is provided with a low-pressure steam conveying pipe, and the second tank body is provided with a liquefied water conveying pipe. A shut-off valve is installed on the liquefied water conveying pipe.

[0008] Preferably, a second air delivery branch pipe is provided on the compressed air delivery main pipe between the inlet end of the compressed air delivery main pipe and the first air delivery branch pipe. The compressed air delivery main pipe is connected to the first heat source channel of the main heat exchanger, and the second air delivery branch pipe is connected to the second heat source channel of the main heat exchanger. The finished oxygen delivery main pipe is connected to the first cold source channel of the main heat exchanger. A booster end for a leveling expander and a fifth regulating valve are provided on the second air delivery branch pipe between the main heat exchanger and the compressed air delivery main pipe. The expansion end of the leveling expander is connected to the outlet end of the second air delivery branch pipe.

[0009] Preferably, a distillation column is provided at the outlet end of the compressed air delivery main pipe. The distillation column is provided with an upper column, a main condenser heat exchanger, and a lower column from top to bottom. The outlet end of the compressed air delivery main pipe is connected to the lower column. The expansion end outlet of the leveling expander is connected to the upper column. The lower column is connected to the heat source channel of the main condenser heat exchanger. The upper column is connected to the cold source channel of the main condenser heat exchanger. A liquid nitrogen delivery main pipe is provided at the outlet end of the cold source channel of the main condenser heat exchanger.

[0010] Preferably, the liquid nitrogen transport main pipe is arranged in sequence along the direction from near the main condenser heat exchanger to far away from the main condenser heat exchanger, with the inlet end of the first liquid nitrogen transport branch pipe, the first heat source channel of the subcooler, the inlet end of the second liquid nitrogen transport branch pipe, and a sixth regulating valve. The outlet end of the first liquid nitrogen transport branch pipe is connected to the lower tower, and the outlet end of the second liquid nitrogen transport branch pipe is connected to the upper tower. The first cold source channel of the subcooler, the second cold source channel of the main heat exchanger, and the upper tower are provided with finished nitrogen transport pipes. The second cold source channel of the subcooler, the third cold source channel of the main heat exchanger, and the upper tower are provided with waste nitrogen transport pipes. The second heat source channel of the subcooler, the lower tower, and the upper tower are provided with oxygen-enriched liquid air transport pipes. The oxygen-enriched liquid air transport pipes are provided with a booster pump and a seventh regulating valve. The first liquid nitrogen transport branch pipe and the second liquid nitrogen transport branch pipe are each provided with an eighth regulating valve.

[0011] Preferably, a liquid level sensor is provided at the bottom of the lower tower.

[0012] The beneficial effects of this utility model are as follows: First, this utility model realizes the mixing of the second part of finished oxygen produced by the air separation distillation system and the first part of compressed air transported through the first air transport branch to form oxygen-enriched oxygen. Then, the second part of high-pressure steam continuously transported to the heat source channel of the auxiliary heat exchanger undergoes countercurrent heat exchange, thereby achieving the effect of heating the oxygen-enriched oxygen. This is because the temperature of the oxygen-enriched oxygen transported through the outlet end of the finished oxygen transport branch is approximately the same as the temperature of the first part of high-pressure steam transported for oxygen-enriched oxygen. This facilitates the use of the ratio of the third gas flow sensor installed on the finished oxygen transport branch and the third gas flow sensor installed on the high-pressure steam transport branch to provide feedback on the volume ratio of oxygen-enriched oxygen and water vapor supplied to the gasifier. This solves the problem of inconsistent temperatures between the oxygen-enriched oxygen and water vapor supplied to the gasifier, which previously required repeated calculations to obtain the correct oxygen-enriched oxygen temperature. This also reduces the impact of excessively low oxygen-enriched oxygen temperature on the gasifier's operation.

[0013] Secondly, the finished oxygen delivery branch pipe of this utility model is provided with a third regulating valve, a first gas flow sensor, a gas mixer and a cold source channel of an auxiliary heat exchanger in sequence along the direction from near the finished oxygen delivery main pipe to far away from the finished oxygen delivery main pipe. The installation of the first gas flow sensor facilitates the feedback of gas flow parameters.

[0014] Furthermore, a liquid level sensor is provided at the bottom of the lower tower described in this utility model; installing the liquid level sensor facilitates the feedback of liquid level parameters.

[0015] This utility model has a simple structure, is easy to operate, and has a clever design, which greatly improves work efficiency and has good social and economic benefits. It is a product that is easy to promote and use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 A magnified view of detail A. Detailed Implementation

[0018] like Figure 1 and Figure 2As shown, an oxygen-enriched supply device includes a main heat exchanger 1, on which a finished oxygen delivery main pipe 2 and a compressed air delivery main pipe 3 are provided. The device is characterized in that: the inlet end of the compressed air delivery main pipe 3 between the inlet end and the main heat exchanger 1 is provided with the inlet end of a first air delivery branch pipe 4; both the first air delivery branch pipe 4 and the main heat exchanger 1 are respectively provided with a first regulating valve 5; the outlet end of the finished oxygen delivery main pipe 2 between the outlet end and the main heat exchanger 1 is provided with a second regulating valve 6; and the second regulating valve 6 and the main heat exchanger 1 are respectively provided with a finished oxygen delivery branch pipe 5. Pipe 7, the finished oxygen delivery branch pipe 7 is provided with a third regulating valve 8, a first gas flow sensor 9, a gas mixer and a cold source channel of an auxiliary heat exchanger 10 in sequence along the direction from near the finished oxygen delivery main pipe 2 to far away from the finished oxygen delivery main pipe 2. The gas mixer includes a first tank 11 and a gas distribution branch pipe 12, a cone 13 and a spiral blade 14 arranged in sequence along the direction from the inlet end of the first tank 11 to the outlet end of the tank 11. A second gas flow sensor 16 is provided on the first air delivery branch pipe 4. The first tank 11 and the finished oxygen delivery branch pipe 7 are connected, the gas distribution branch pipe 12 and the first air delivery branch pipe 4 are connected, and the heat source channel of the auxiliary heat exchanger 10 is connected to the high-pressure steam delivery main pipe 15. The high-pressure steam conveying main pipe 15 is provided with an inlet end of a high-pressure steam conveying branch pipe 17. The outlet end of the high-pressure steam conveying branch pipe 17 is connected to the inlet end of the heat source channel of the auxiliary heat exchanger 10. A fourth regulating valve 18 is provided on both the high-pressure steam conveying main pipe 15 and the high-pressure steam conveying branch pipe 17. This diverts the high-pressure steam conveyed by the high-pressure steam conveying main pipe 15 to a stream that is conveyed through the high-pressure steam conveying branch pipe 17 to the heat source channel of the auxiliary heat exchanger 10, thereby heating the medium conveyed through the cold source channel of the auxiliary heat exchanger 10, and thus raising the temperature of the oxygen-enriched oxygen conveyed through the finished oxygen conveying branch pipe 7. Furthermore, since the steam transported outward through the outlet end of the heat source channel of the auxiliary heat exchanger 10 undergoes a phase change due to partial liquefaction, this product is equipped with an inlet end of a mixed gas conveying pipe 19 at the outlet end of the heat source channel of the auxiliary heat exchanger 10. A gas-liquid separator is installed at the outlet end of the mixed gas conveying pipe 19. The gas-liquid separator includes a second tank body 20 and a wire mesh coalescer 21 installed inside the second tank body 20. The second tank body 20 below the wire mesh coalescer 21 is connected to the outlet end of the mixed gas conveying pipe 19. A low-pressure steam conveying pipe 23 is installed in the second tank body 20 above the wire mesh coalescer 21. A liquefied water conveying pipe 22 is installed in the second tank body 20, and a shut-off valve 24 is installed on the liquefied water conveying pipe 22.This facilitates the separation and recovery of liquid components in the gas-liquid mixture transported outward from the heat source channel of the auxiliary heat exchanger 10 using the wire mesh coalescer 21, and temporarily stores them in the second tank 20 below the wire mesh coalescer 21.

[0019] A second air delivery branch pipe 25 is provided on the compressed air delivery main pipe 3 between the inlet end of the compressed air delivery main pipe 3 and the first air delivery branch pipe 4. The compressed air delivery main pipe 3 is connected to the first heat source channel of the main heat exchanger 1. The second air delivery branch pipe 25 is connected to the second heat source channel of the main heat exchanger 1. The finished oxygen delivery main pipe 2 is connected to the first cold source channel of the main heat exchanger 1. The second air delivery branch pipe 25 between the main heat exchanger 1 and the compressed air delivery main pipe 3 is provided with the boosting end of the leveling expander 26 and the fifth regulating valve 27. The expansion end of the leveling expander 26 is connected to the outlet end of the second air delivery branch pipe 25. A distillation column is provided at the outlet end of the compressed air delivery main pipe 3. The distillation column is provided with an upper column 28, a main condenser heat exchanger 29 and a lower column 30 from top to bottom. The outlet end of the compressed air delivery main pipe 3 is connected to the lower column 30. The expansion end outlet of the leveling expander 26 is connected to the upper column 28. The lower column 30 is connected to the heat source channel of the main condenser heat exchanger 29. The upper column 28 is connected to the cold source channel of the main condenser heat exchanger 29. A liquid nitrogen delivery main pipe 31 is provided at the outlet end of the cold source channel of the main condenser heat exchanger 29. The liquid nitrogen transport main pipe 31 is sequentially arranged along the direction from near the main condenser heat exchanger 29 to far away from the main condenser heat exchanger 29, with the inlet end of the first liquid nitrogen transport branch pipe 32, the first heat source channel of the subcooler 33, the inlet end of the second liquid nitrogen transport branch pipe 34, and the sixth regulating valve 35. The outlet end of the first liquid nitrogen transport branch pipe 32 is connected to the lower tower 30, and the outlet end of the second liquid nitrogen transport branch pipe 34 is connected to the upper tower 28. The first cold source channel of the subcooler 33, the second cold source channel of the main heat exchanger 1, and the upper tower 28 are provided with finished nitrogen gas transport pipes 36. The second cold source channel of the subcooler 33, the third cold source channel of the main heat exchanger 1, and the upper tower 28 are provided with waste nitrogen gas transport pipes 37. The second heat source channel of the subcooler 33, the lower tower 30, and the upper tower 28 are provided with oxygen-enriched liquid air transport pipes 38. The oxygen-enriched liquid air transport pipe 38 is provided with a booster pump 39 and a seventh regulating valve 40. An eighth regulating valve 41 is installed on both the first liquid nitrogen delivery branch pipe 32 and the second liquid nitrogen delivery branch pipe 34. A third gas flow sensor 43 is installed on the finished oxygen delivery branch pipe 7 between its outlet end and the auxiliary heat exchanger 10, and on the high-pressure steam delivery main pipe 15 between its outlet end and the high-pressure steam delivery branch pipe 17. A liquid level sensor 42 is installed at the bottom of the lower tower 30; the liquid level sensor 42 facilitates feedback of liquid level parameters.

[0020] The usage instructions for this product are as follows: Figure 1 and Figure 2As shown, it includes the following steps: S1. Purified compressed air is continuously supplied to the compressed air supply main pipe 3. After entering the compressed air supply main pipe 3, the compressed air is divided into three parts: a first part of compressed air, a second part of compressed air, and a third part of compressed air. The first part of compressed air is supplied to the gas mixer through the first air supply branch pipe 4. The second part of compressed air continues to travel along the compressed air supply main pipe 3, exchanges heat with the first heat source channel of the main heat exchanger 1 and the cold source continuously supplied to the main heat exchanger 1, and is then supplied to the lower column 30 as the distillation feedstock of the lower column 30. The third part of compressed air is supplied to the second air supply branch pipe 25, first compressed by the booster end of the leveling expander 26, and then supplied to the second heat source channel of the main heat exchanger 1 and the cold source continuously supplied to the main heat exchanger 1 for heat exchange. After being discharged from the medium temperature zone of the main heat exchanger 1, it is supplied to the expansion end of the leveling expander 26 for expansion and cooling to form expanded air. The expanded air is supplied to the upper column 28 as the gaseous distillation feedstock of the upper column 28.

[0021] S2. The second portion of compressed air enters the lower tower 30 and forms a first upward airflow. During this process, it exchanges heat countercurrently with the first reflux condensate transported from the top of the lower tower 30, ultimately forming a first nitrogen enrichment zone at the top of the lower tower 30 and an oxygen-rich liquid air enrichment zone at the bottom of the lower tower 30. The first nitrogen enrichment zone continuously supplies pressurized nitrogen to the heat source channel of the main condenser heat exchanger 29. After entering the heat source channel of the main condenser heat exchanger 29, the pressurized nitrogen exchanges heat with the medium in the cold source channel of the main condenser heat exchanger 29, is liquefied, and forms liquid nitrogen. This liquid nitrogen is continuously transported to the liquid nitrogen transport main pipe 31 through the outlet end of the heat source channel of the main condenser heat exchanger 29. After entering the liquid nitrogen transport main pipe 31, the liquid nitrogen is divided into three parts: a first part of liquid nitrogen and a second part of liquid nitrogen. The first part of liquid nitrogen is transported to the lower tower 30 via the first liquid nitrogen transport branch pipe 32 as the first reflux condensate of the lower tower 30. The second portion of liquid nitrogen undergoes heat exchange through the first heat source channel of the subcooler 33 and the continuously supplied cold source to the subcooler 33 to form subcooled liquid nitrogen. This subcooled liquid nitrogen is continuously discharged through the outlet of the first heat source channel of the subcooler 33 and is divided into two parts again: a first portion of subcooled liquid nitrogen and a second portion of subcooled liquid nitrogen. The first portion of subcooled liquid nitrogen is transported to the upper column 28 via the second liquid nitrogen delivery branch pipe 34 as the second reflux condensate of the upper column 28. The second portion of subcooled liquid nitrogen is discharged through the outlet of the liquid nitrogen delivery main pipe 31 into a corresponding liquid nitrogen storage tank for temporary storage of the finished liquid nitrogen product. The oxygen-enriched liquid air enrichment zone continuously supplies oxygen-enriched liquid air to the oxygen-enriched liquid air delivery pipe 38. This oxygen-enriched liquid air is pressurized by the booster pump 39 and then transported to the second heat source channel of the subcooler 33 for heat exchange with the continuously supplied cold source to the subcooler 33 to form subcooled oxygen-enriched liquid air, which is then transported to the upper column 28 as the liquid distillation feedstock for the upper column 28.

[0022] S3. After the expanded air enters the upper tower 28, it forms a second rising airflow. The second rising airflow first undergoes countercurrent heat exchange with the subcooled oxygen-enriched liquid air entering the upper tower 28 and is initially purified. Then, the second rising airflow continues to rise and is transported to the second reflux condensate in the upper tower 28 for countercurrent heat exchange and is purified again. Finally, a second nitrogen enrichment zone is formed at the top of the upper tower 28.

[0023] The subcooled oxygen-enriched liquid air entering the upper column 28 and the second reflux condensate of the upper column 28 merge to form a second descending liquid flow. This second descending liquid flow enters the cold source channel of the main condenser heat exchanger 29 and exchanges heat with the medium continuously supplied to the heat source channel of the main condenser heat exchanger 29 to form a third ascending airflow. This third ascending airflow continues to rise along the upper column 28 and eventually merges into the second ascending airflow. Finally, a liquid oxygen enrichment zone is formed in the cold source channel of the main condenser heat exchanger 29, and an oxygen enrichment zone is formed at the bottom of the upper column 28.

[0024] S4. The second nitrogen enrichment zone continuously supplies finished nitrogen to the finished nitrogen delivery pipe 36. The finished nitrogen entering the finished nitrogen delivery pipe 36 first passes through the first cold source channel of the cooler 33 and the heat source continuously supplied to the subcooler 33 for heat exchange, and then passes through the second cold source channel of the main heat exchanger 1 and the heat source continuously supplied to the main heat exchanger 1 for heat exchange, and then supplies finished nitrogen to the customer through the outlet end of the finished nitrogen delivery pipe 36.

[0025] The second nitrogen enrichment zone continuously supplies impure nitrogen gas to the impure nitrogen gas delivery pipe 37. The impure nitrogen gas entering the impure nitrogen gas delivery pipe 37 first passes through the second cold source channel of the cooler 33 and the heat source continuously supplied to the subcooler 33 for heat exchange, and then passes through the third cold source channel of the main heat exchanger 1 and the heat source continuously supplied to the main heat exchanger 1 for heat exchange, and then supplies impure nitrogen gas to the customer through the outlet end of the finished nitrogen gas delivery pipe 36.

[0026] The oxygen enrichment zone continuously supplies finished oxygen to the finished oxygen delivery main pipe 2. The finished oxygen entering the finished oxygen delivery main pipe 2 is divided into two parts after heat exchange with the first cold source channel of the main heat exchanger 1 and the continuously supplied heat source. These are the first part of finished oxygen and the second part of finished oxygen. The first part of finished oxygen is supplied to the customer through the outlet of the finished oxygen delivery main pipe 2. During the process of supplying finished oxygen from the main pipe 2 to the finished oxygen delivery branch pipe 7, the first tank 11 of the gas mixer mixes the first part of compressed air supplied via the gas distribution branch pipe 12 with the first part of compressed air under the action of the cone 13 and the spiral blades 14 to form oxygen-enriched oxygen. The oxygen-enriched oxygen is then supplied to the cold source channel of the auxiliary heat exchanger 10 and the heat source supplied via the heat source channel of the auxiliary heat exchanger 10 for heat exchange. After the flow parameters are fed back by the third gas flow sensor 43 on the finished oxygen delivery branch pipe 7, it is delivered to the gasifier user.

[0027] Meanwhile, the high-pressure steam conveying main pipe 15 continuously receives high-pressure steam. The high-pressure steam entering the high-pressure steam conveying main pipe 15 is divided into two parts: a first part of high-pressure steam and a second part of high-pressure steam. The first part of high-pressure steam is delivered to the gasifier user after the flow rate is fed back by the third gas flow sensor 43 of the high-pressure steam conveying main pipe 15. The second part of high-pressure steam is continuously delivered to the heat source channel of the auxiliary heat exchanger 10 and to the medium heat exchanger 10 cold source channel. The outlet end of the heat source channel of the auxiliary heat exchanger 10 continuously discharges a gas-liquid mixture. The gas-liquid mixture is delivered to the second tank 20 and separated into gas and liquid phases by the wire mesh coalescer 21. The liquid phase, i.e., condensate, is temporarily stored in the second tank 20 below the wire mesh coalescer 21. The gas phase, which is low-pressure steam, is continuously delivered to the low-pressure steam conveying pipe 23 and delivered to the user through the outlet end of the low-pressure steam conveying pipe 23.

[0028] This embodiment achieves the mixing of the second portion of finished oxygen produced by the air separation distillation system via the finished oxygen delivery branch pipe 7 and the first portion of compressed air via the first air delivery branch pipe 4 to form oxygen-enriched oxygen. This oxygen is then subjected to countercurrent heat exchange through the cold source channel of the auxiliary heat exchanger 10 and the second portion of high-pressure steam continuously supplied to the heat source channel of the auxiliary heat exchanger 10, thereby heating the oxygen-enriched oxygen. Since the temperature of the oxygen-enriched oxygen delivered through the outlet of the finished oxygen delivery branch pipe 7 is approximately the same as the temperature of the first portion of high-pressure steam, it is convenient to use the ratio of the third gas flow sensor 43 installed on the finished oxygen delivery branch pipe 7 and the third gas flow sensor 43 installed on the high-pressure steam delivery branch pipe 17 to provide feedback on the volume ratio of oxygen-enriched oxygen and water vapor delivered to the gasifier. This solves the problem of inconsistent temperatures between the oxygen-enriched oxygen and water vapor supplied to the gasifier, which previously required repeated calculations to obtain the correct temperature. Furthermore, it reduces the impact of excessively low oxygen-enriched oxygen temperatures on the gasifier's operation.

[0029] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. An oxygen-enriched supply device, comprising a main heat exchanger (1), wherein the main heat exchanger (1) is provided with a finished oxygen delivery main pipe (2) and a compressed air delivery main pipe (3), characterized in that: The compressed air main pipe (3) between the inlet end of the compressed air main pipe (3) and the main heat exchanger (1) is provided with the inlet end of the first air supply branch pipe (4). The compressed air main pipe (3) between the first air supply branch pipe (4) and the main heat exchanger (1) and the first air supply branch pipe (4) are respectively provided with a first regulating valve (5). The finished oxygen supply main pipe (2) between the outlet end of the finished oxygen supply main pipe (2) and the main heat exchanger (1) is provided with a second regulating valve (6). The finished oxygen supply branch pipe (7) between the second regulating valve (6) and the main heat exchanger (1) is provided with a finished oxygen supply branch pipe (7). The finished oxygen supply branch pipe (7) extends from near the finished oxygen supply main pipe (2) to far away from the finished oxygen supply main pipe (2). The oxygen delivery main pipe (2) is provided with a third regulating valve (8), a first gas flow sensor (9), a gas mixer and a cold source channel for an auxiliary heat exchanger (10) in sequence. The gas mixer includes a first tank (11) and a gas distribution branch pipe (12), a cone (13) and a spiral blade (14) arranged in sequence along the direction from the inlet end to the outlet end of the first tank (11). A second gas flow sensor (16) is provided on the first air delivery branch pipe (4). The first tank (11) is connected to the finished oxygen delivery branch pipe (7), the gas distribution branch pipe (12) is connected to the first air delivery branch pipe (4), and a high-pressure steam delivery main pipe (15) is connected to the heat source channel of the auxiliary heat exchanger (10).

2. The oxygen-enriched supply device according to claim 1, characterized in that: The high-pressure steam transmission main pipe (15) is provided with the inlet end of the high-pressure steam transmission branch pipe (17), the outlet end of the high-pressure steam transmission branch pipe (17) is connected to the inlet end of the heat source channel of the auxiliary heat exchanger (10), and a fourth regulating valve (18) is provided on the high-pressure steam transmission main pipe (15) and the high-pressure steam transmission branch pipe (17) between the outlet end of the high-pressure steam transmission main pipe (15) and the high-pressure steam transmission branch pipe (17).

3. The oxygen-enriched supply device according to claim 2, characterized in that: The outlet end of the heat source channel of the auxiliary heat exchanger (10) is provided with the inlet end of the mixed gas conveying pipe (19), and the outlet end of the mixed gas conveying pipe (19) is provided with a gas-liquid separator. The gas-liquid separator includes a second tank (20) and a wire mesh coalescer (21) provided inside the second tank (20). The second tank (20) below the wire mesh coalescer (21) is connected to the outlet end of the mixed gas conveying pipe (19). The second tank (20) above the wire mesh coalescer (21) is provided with a low-pressure steam conveying pipe (23), and the second tank (20) is provided with a liquefied water conveying pipe (22). A shut-off valve (24) is provided on the liquefied water conveying pipe (22).

4. The oxygen-enriched supply device according to claim 1, characterized in that: A second air delivery branch pipe (25) is provided on the compressed air delivery main pipe (3) between the inlet end of the compressed air delivery main pipe (3) and the first air delivery branch pipe (4). The compressed air delivery main pipe (3) is connected to the first heat source channel of the main heat exchanger (1). The second air delivery branch pipe (25) is connected to the second heat source channel of the main heat exchanger (1). The finished oxygen delivery main pipe (2) is connected to the first cold source channel of the main heat exchanger (1). The pressure boosting end of the leveling expander (26) and the fifth regulating valve (27) are provided on the second air delivery branch pipe (25) between the main heat exchanger (1) and the compressed air delivery main pipe (3). The expansion end of the leveling expander (26) is connected to the outlet end of the second air delivery branch pipe (25).

5. The oxygen-enriched supply device according to claim 4, characterized in that: A distillation column is provided at the outlet end of the compressed air conveying main pipe (3). The distillation column is provided with an upper column (28), a main condenser heat exchanger (29) and a lower column (30) from top to bottom. The outlet end of the compressed air conveying main pipe (3) is connected to the lower column (30). The expansion end outlet of the leveling expander (26) is connected to the upper column (28). The lower column (30) is connected to the heat source channel of the main condenser heat exchanger (29). The upper column (28) is connected to the cold source channel of the main condenser heat exchanger (29). A liquid nitrogen conveying main pipe (31) is provided at the outlet end of the cold source channel of the main condenser heat exchanger (29).

6. The oxygen-enriched supply device according to claim 5, characterized in that: The liquid nitrogen transport main pipe (31) is arranged along the direction from near the main condenser heat exchanger (29) to far away from the main condenser heat exchanger (29) with the inlet end of the first liquid nitrogen transport branch pipe (32), the first heat source channel of the subcooler (33), the inlet end of the second liquid nitrogen transport branch pipe (34), and the sixth regulating valve (35) in sequence. The outlet end of the first liquid nitrogen transport branch pipe (32) is connected to the lower tower (30), and the outlet end of the second liquid nitrogen transport branch pipe (34) is connected to the upper tower (28). The first liquid nitrogen transport branch pipe (33) has a first heat source channel of the subcooler (33). A finished nitrogen delivery pipe (36) is installed on the cold source channel, the second cold source channel of the main heat exchanger (1) and the upper tower (28). A waste nitrogen delivery pipe (37) is installed on the second cold source channel of the subcooler (33), the third cold source channel of the main heat exchanger (1) and the upper tower (28). An oxygen-enriched liquid air delivery pipe (38) is installed on the second heat source channel of the subcooler (33), the lower tower (30) and the upper tower (28). A booster pump (39) and a seventh regulating valve (40) are installed on the oxygen-enriched liquid air delivery pipe (38). An eighth regulating valve (41) is installed on the first liquid nitrogen delivery branch pipe (32) and the second liquid nitrogen delivery branch pipe (34).

7. The oxygen-enriched supply device according to claim 5, characterized in that: A liquid level sensor (42) is provided at the bottom of the lower tower (30).

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