Liquid oxygen gasification device

Abstract

The utility model discloses a liquid oxygen gasification device belongs to chemical equipment technical field. The utility model solves how to provide a kind of liquid oxygen gasification device of improving system stability and the problem of operating flexibility in prior art. The utility model includes one first liquid oxygen storage tank and at least one second liquid oxygen storage tank, first liquid oxygen storage tank and the first pipeline between second liquid oxygen storage tank is provided with regulating valve group, the region between first valve group and second valve group on first pipeline is connected with liquid oxygen supplement pipe, liquid oxygen supplement pipe is connected with liquid oxygen supplement mechanism, first liquid oxygen storage tank is connected with pressurizing mechanism by second pipeline, pressurizing mechanism is connected with gasification mechanism by third pipeline, gasification mechanism is connected with oxygen buffer tank. The utility model is through second liquid oxygen storage tank for first liquid oxygen storage tank dynamic liquid supplement, ensure that first liquid oxygen storage tank liquid level is always in safe range, improve liquid oxygen capacity, reduce the liquid supplement frequency of shutdown.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a liquid oxygen oxidation device. Background Technology

[0002] Current ammonia synthesis generally employs an oxygen-enriched steam heat exchange conversion process, which requires pure oxygen in the conversion stage. Existing liquid oxygen gasification units typically use a single storage tank for liquid oxygen supply, leading to problems such as discontinuous supply and frequent replenishment when tank capacity is insufficient. Furthermore, single-tank systems are prone to oxygen supply interruptions due to pressure fluctuations or equipment maintenance, impacting production efficiency. While some systems utilize a multi-tank parallel design, parallel structures struggle to achieve dynamic level regulation and efficient pressure coordination control. Therefore, a liquid oxygen gasification unit that can improve system stability and operational flexibility is urgently needed. Utility Model Content

[0003] To address the problem of how to provide a liquid oxygenation device that can improve system stability and operational flexibility in the existing technology, this utility model provides a liquid oxygenation device.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A liquid oxygen vaporization device includes a first liquid oxygen storage tank and at least one second liquid oxygen storage tank. The first and second liquid oxygen storage tanks are connected by a first pipeline. A regulating valve group is provided on the first pipeline, the regulating valve group including a first valve group and a second valve group. A liquid oxygen replenishment pipe is connected to the area between the first and second valve groups on the first pipeline. The liquid oxygen replenishment pipe is connected to a liquid oxygen replenishment mechanism. The first liquid oxygen storage tank is connected to a pressurization mechanism via a second pipeline. The pressurization mechanism is connected to a vaporization mechanism via a third pipeline. The vaporization mechanism is connected to an oxygen buffer tank.

[0006] Preferably, the first valve group includes a first valve and a second valve, and the second valve group includes a third valve, a fourth valve and a fifth valve, wherein the first valve, the second valve, the third valve, the fourth valve and the fifth valve are connected in series from the outlet of the second liquid oxygen storage tank to the inlet of the first liquid oxygen storage tank.

[0007] After adopting this technical solution, when replenishing liquid, valves 1, 2, 4 and 5 are fully opened to prevent liquid oxygen from oxidizing in the pipeline and causing pressure buildup. Liquid oxygen is then replenished by opening valve 3. Adjusting the opening of valve 3 can control the rate of liquid oxygen replenishment. If continuous liquid oxygen replenishment is required, the liquid oxygen replenishment flow rate can be adjusted to be approximately equal to the liquid oxygen oxidization flow rate by adjusting the valve opening.

[0008] Preferably, the volume of the second liquid oxygen storage tank is larger than that of the first liquid oxygen storage tank.

[0009] Preferably, one second liquid oxygen storage tank is provided, and the volume of the second liquid oxygen storage tank is 50m³. 3 The volume of the first liquid oxygen storage tank is 30m³. 3 The pressure inside the second liquid oxygen storage tank is 0.40 MPa to 0.80 MPa, and the pressure inside the first liquid oxygen storage tank is 0.20 MPa to 0.38 MPa.

[0010] Preferably, the area on the first pipeline located between the first valve group and the second valve group is also connected to a fourth pipeline, which is connected to the second pipeline, and a sixth valve is provided on the fourth pipeline.

[0011] After adopting this technical solution, the first liquid oxygen storage tank and the second liquid oxygen storage tank can be freely switched to be used in series, in parallel, or individually through the fourth pipeline, which makes it easy to deal with unexpected situations such as overpressure, leakage, and blockage of the liquid oxygen storage tank.

[0012] Preferably, the pressurizing mechanism is also connected to the first liquid oxygen storage tank and the second liquid oxygen storage tank via a return gas pipeline. The return gas pipeline includes a main return gas pipe connected to the pressurizing mechanism, and the main return gas pipe is connected to at least two branch return gas pipes. Each branch return gas pipe is connected to either the first liquid oxygen storage tank or the second liquid oxygen storage tank. Each branch return gas pipe is equipped with a seventh valve. The main return gas pipe is also equipped with a first vent pipe.

[0013] Preferably, the pressurization mechanism includes a main liquid oxygen pump and a secondary liquid oxygen pump connected in parallel. The feed pipes of the main liquid oxygen pump and the secondary liquid oxygen pump are both connected to the second pipeline, and an eighth valve and a ninth valve are respectively provided on the feed pipes of the main liquid oxygen pump and the secondary liquid oxygen pump.

[0014] The discharge pipes of the main liquid oxygen pump and the auxiliary liquid oxygen pump are both connected to the gasification mechanism. The discharge port pressures of the main liquid oxygen pump and the auxiliary liquid oxygen pump are 1.50 MPa to 3.55 MPa. The discharge pipes of the main liquid oxygen pump and the auxiliary liquid oxygen pump are respectively equipped with a tenth valve and an eleventh valve. Each of the discharge pipes of the main liquid oxygen pump and the auxiliary liquid oxygen pump is equipped with a spring safety valve.

[0015] The drain pipes of the main liquid oxygen pump and the auxiliary liquid oxygen pump are both connected to the main return gas pipe, and the drain pipes of the main liquid oxygen pump and the auxiliary liquid oxygen pump are respectively equipped with a twelfth valve and a thirteenth valve.

[0016] With this technical solution, the function of the spring safety valve is to prevent pipeline pressure buildup. When the pipeline pressure reaches the set pressure of the spring safety valve, the spring safety valve will automatically open to release pressure.

[0017] Preferably, the vaporization mechanism includes a vaporizer, which includes a steam inlet, a sand-filtered water inlet, a liquid oxygen inlet, an oxygen outlet, an overflow outlet, and a drain outlet.

[0018] The steam inlet is connected to a low-pressure steam source via a fifth pipeline;

[0019] The sand filter water inlet is connected to a sand filter water source through a sixth pipeline, and fourteen valves are installed on the sixth pipeline;

[0020] The liquid oxygen inlet is connected to the third pipeline;

[0021] The oxygen outlet is connected to the oxygen buffer tank via a seventh pipeline.

[0022] Preferably, the fifth pipeline includes a fifth main pipe and a fifth branch pipe connected in parallel, and the fifth main pipe and the fifth branch pipe are respectively equipped with a fifteenth valve and a sixteenth valve, and the fifth main pipe is also equipped with an electric valve.

[0023] The seventh pipeline includes a seventh main pipe and a seventh branch pipe connected in parallel. The seventh main pipe and the seventh branch pipe are respectively equipped with a seventeenth valve and an eighteenth valve. The seventh main pipe is also equipped with a self-regulating valve.

[0024] With this technical solution, the electric valve is an automatic valve that can automatically control the valve opening and regulate the steam flow by feedback from the temperature of the water in the vaporizer.

[0025] Preferably, a second vent pipe is provided on the third pipeline.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0027] 1. This utility model, through the series design of a first liquid oxygen storage tank and at least one second liquid oxygen storage tank, enables the second liquid oxygen storage tank to dynamically replenish the first liquid oxygen storage tank, ensuring that the liquid level in the first liquid oxygen storage tank is always within a safe range (10m). 3 ~27m 3 This increased the liquid oxygen capacity and reduced the number of times the system needed to be shut down for replenishment.

[0028] 2. In this utility model, the first liquid oxygen storage tank and the second liquid oxygen storage tank can be freely switched between being used in series, in parallel, or individually, making it easy to deal with unexpected situations such as overpressure, leakage, and blockage of the liquid oxygen storage tank;

[0029] 3. In this utility model, by implementing graded pressure management of the first and second liquid oxygen storage tanks, the stability of the inlet pressure of the liquid oxygen pump is improved, the load fluctuation of the liquid oxygen pump is reduced, the equipment life is extended, and the production stability is improved. Attached Figure Description

[0030] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Wherein: 1-Liquid oxygen replenishment mechanism, 2-Liquid oxygen replenishment pipe, 3-First pipeline, 4-First valve, 5-Second valve, 6-Third valve, 7-Fourth valve, 8-Fifth valve, 9-Fourth pipeline, 10-Sixth valve, 11-Second liquid oxygen storage tank, 12-First liquid oxygen storage tank, 13-Seventh valve, 14-Return gas branch pipe, 15-First vent pipe, 16-Return gas main pipe, 17-Eighth valve, 18-Ninth valve, 19-Twelfth valve 20-Thirteenth valve, 21-Main liquid oxygen pump, 22-Auxiliary liquid oxygen pump, 23-Spring safety valve, 24-Tenth valve, 25-Eleventh valve, 26-Second vent pipe, 27-Vaporization mechanism, 28-Seventeenth valve, 29-Seventh main pipe, 30-Self-supporting regulating valve, 31-Eighteenth valve, 32-Seventh branch pipe, 33-Fifteenth valve, 34-Fifth main pipe, 35-Electric valve, 36-Sixteenth valve, 37-Fifth branch pipe. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] The following is combined with Figure 1This utility model will be described in detail.

[0036] like Figure 1 As shown, a liquid oxygen gasification device includes a first liquid oxygen storage tank 12 and at least one second liquid oxygen storage tank 11. Normally, one second liquid oxygen storage tank 11 is provided, and a second liquid oxygen storage tank 11 of appropriate volume can be selected as needed. For emergency situations such as maintenance or malfunctions, multiple second liquid oxygen storage tanks 11 connected in parallel (e.g., two) can be connected to the first liquid oxygen storage tank 12. When one of the second liquid oxygen storage tanks 11 fails or requires maintenance, the other can be activated. The first liquid oxygen storage tank 12 and the second liquid oxygen storage tank 11 are connected through a first pipeline 3. A regulating valve group is provided on the first pipeline 3, including a first valve group and a second valve group. A liquid oxygen replenishment pipe 2 is connected to the area between the first and second valve groups on the first pipeline 3. The liquid oxygen replenishment pipe 2, located between the first and second valve groups, allows the first valve group to be opened and the second valve group to be closed. Liquid oxygen is replenished to the second liquid oxygen storage tank 11 under the condition of being closed, and liquid oxygen is replenished to the first liquid oxygen storage tank 12 under the condition of closing the first valve group and opening the second valve group, which has strong flexibility; the liquid oxygen replenishment pipe 2 is connected to the liquid oxygen replenishment mechanism 1, and a valve is installed on the liquid oxygen replenishment pipe 2 to realize the opening and closing of the liquid oxygen replenishment pipe 2; in this embodiment, the liquid oxygen replenishment mechanism 1 can be from the liquid oxygen of the distillation column (air separation section) under normal conditions, and when the liquid oxygen in the distillation column is insufficient, liquid oxygen can be replenished by purchasing liquid oxygen tank trucks; the first liquid oxygen storage tank 12 is connected to the pressurization mechanism through the second pipeline, and the pressurization mechanism is connected to the vaporization mechanism 27 through the third pipeline. The liquid oxygen in the first liquid oxygen storage tank 12 enters the pressurization mechanism and is pressurized to about 3.0 MPa. The vaporization mechanism 27 is connected to the oxygen buffer tank. After the liquid oxygen is vaporized into oxygen in the vaporization mechanism 27, it is sent to the oxygen buffer tank for storage and reserved for use in subsequent sections.

[0037] In one embodiment, the first valve group includes a first valve 4 and a second valve 5, and the second valve group includes a third valve 6, a fourth valve 7, and a fifth valve 8. The first valve 4, second valve 5, third valve 6, fourth valve 7, and fifth valve 8 are connected in series from the outlet of the second liquid oxygen storage tank 11 to the inlet of the first liquid oxygen storage tank 12. Liquid oxygen can be intermittently or continuously replenished to the first liquid oxygen storage tank 12 by adjusting the valve group. During replenishment, the first valve 4, second valve 5, fourth valve 7, and fifth valve 8 are fully open to prevent pressure buildup caused by liquid oxygen vaporization in the pipeline. Liquid oxygen is replenished by opening the third valve 6. Adjusting the opening of the third valve 6 controls the rate of liquid oxygen replenishment. If continuous replenishment is required, the liquid oxygen replenishment flow rate can be adjusted to approximately match the liquid oxygen vaporization flow rate by adjusting the valve opening.

[0038] In one embodiment, the volume of the second liquid oxygen storage tank 11 is larger than the volume of the first liquid oxygen storage tank 12. More preferably, the volume of the second liquid oxygen storage tank 11 is larger than the volume of the first liquid oxygen storage tank 12 to reduce the frequency of liquid oxygen replenishment by the liquid oxygen replenishment mechanism 1.

[0039] In one embodiment, a second liquid oxygen storage tank 11 is provided, and the volume of the second liquid oxygen storage tank 11 is 50m³. 3 The volume of the first liquid oxygen storage tank 12 is 30m³. 3 The pressure inside the second liquid oxygen storage tank 11 is 0.40 MPa to 0.80 MPa, and the pressure inside the first liquid oxygen storage tank 12 is 0.20 MPa to 0.38 MPa.

[0040] The specific parameters of the first liquid oxygen storage tank 12 and the first liquid oxygen storage tank 11 are shown in Table 1 below:

[0041] Table 1

[0042]

[0043] In one embodiment, a fourth pipeline 9 is connected to the area between the first valve group and the second valve group on the first pipeline 3. The fourth pipeline 9 is connected to the second pipeline, and a sixth valve 10 is provided on the fourth pipeline 9. The first liquid oxygen storage tank 12 and the second liquid oxygen storage tank 11 can be freely switched between being used in series, in parallel, or individually through the fourth pipeline 9, which makes it easy to deal with unexpected situations such as overpressure, leakage, and blockage of the liquid oxygen storage tank.

[0044] In one embodiment, the pressurizing mechanism is further connected to the first liquid oxygen storage tank 12 and the second liquid oxygen storage tank 11 via a return gas pipeline. The return gas pipeline includes a main return gas pipe 16 connected to the pressurizing mechanism, and two branch return gas pipes 14 connected to each of the first liquid oxygen storage tank 12 or the second liquid oxygen storage tank 11. Each branch return gas pipe 14 is equipped with a seventh valve 13. A first vent pipe 15 is also provided on the main return gas pipe 16. The function of the return gas pipeline is to return oxygen from the liquid oxygen pump body to the upper layer of the liquid oxygen storage tank, preventing gas binding in the pump body that could lead to liquid oxygen flow interruption. The seventh valve 13 controls the opening and closing of the return gas pipeline.

[0045] In one embodiment, the pressurization mechanism includes a main liquid oxygen pump 21 and a secondary liquid oxygen pump 22 connected in parallel. The feed pipes of both the main liquid oxygen pump 21 and the secondary liquid oxygen pump 22 are connected to a second pipeline, and an eighth valve 17 and a ninth valve 18 are respectively provided on the feed pipes of the main liquid oxygen pump 21 and the secondary liquid oxygen pump 22. The main liquid oxygen pump 21 and the secondary liquid oxygen pump 22 can pressurize liquid oxygen. Under normal circumstances, only the main liquid oxygen pump 21 can be used for pressurization. In case of maintenance, failure of the main liquid oxygen pump 21, or need to improve pressurization efficiency, the secondary liquid oxygen pump 22 can be started.

[0046] The discharge pipes of the main liquid oxygen pump 21 and the auxiliary liquid oxygen pump 22 are both connected to the vaporization mechanism 27. The discharge port pressures of the main liquid oxygen pump 21 and the auxiliary liquid oxygen pump 22 are 1.50 MPa to 3.55 MPa. The discharge pipes of the main liquid oxygen pump 21 and the auxiliary liquid oxygen pump 22 are respectively equipped with a tenth valve 24 and an eleventh valve 25. The discharge pipes of the main liquid oxygen pump 21 and the auxiliary liquid oxygen pump 22 are each equipped with a spring safety valve 23.

[0047] The drain pipes of both the main liquid oxygen pump 21 and the auxiliary liquid oxygen pump 22 are connected to the main return gas pipe 16, and a twelfth valve 19 and a thirteenth valve 20 are respectively installed on the drain pipes of the main liquid oxygen pump 21 and the auxiliary liquid oxygen pump 22. This structure allows the gas generated by the pumps to be discharged into the liquid oxygen storage tank, or it can be discharged through the vent pipe.

[0048] In one embodiment, the vaporization mechanism 27 includes a vaporizer, which includes a steam inlet, a sand-filtered water inlet, a liquid oxygen inlet, an oxygen outlet, an overflow outlet, and a drain outlet.

[0049] The steam inlet is connected to a low-pressure steam source via a fifth pipeline;

[0050] The sand filter water inlet is connected to a sand filter water source through a sixth pipeline, and fourteen valves are installed on the sixth pipeline;

[0051] The liquid oxygen inlet is connected to the third pipeline;

[0052] The oxygen outlet is connected to the oxygen buffer tank via a seventh pipeline.

[0053] In one embodiment, the fifth pipeline includes a fifth main pipe 34 and a fifth branch pipe 37 connected in parallel. The fifth main pipe 34 and the fifth branch pipe 37 are respectively provided with a fifteenth valve 33 and a sixteenth valve 36. The fifth main pipe 34 is also provided with an electric valve 35.

[0054] The seventh pipeline includes a seventh main pipe 29 and a seventh branch pipe 32 connected in parallel. The seventh main pipe 29 and the seventh branch pipe 32 are respectively equipped with a seventeenth valve 28 and an eighteenth valve 31. The seventh main pipe 29 is also equipped with a self-regulating valve 30 (whose function is to automatically adjust the valve opening according to the valve outlet pressure to maintain the valve outlet pressure stable).

[0055] In one embodiment, a second vent pipe 26 is provided on the third pipeline, which is used to remove residual oxygen by opening the second vent pipe 26 when liquid oxygen is not in use.

[0056] In one embodiment, both the first liquid oxygen storage tank 12 and the second liquid oxygen storage tank 11 are equipped with liquid level sensors. The liquid level sensors can detect the liquid level of the first liquid oxygen storage tank 12 and the second liquid oxygen storage tank 11. In conjunction with the emergency pressure relief valve (the emergency pressure relief valve is built into the tank body and works on the same principle as the safety valve. It automatically opens to relieve pressure when the pressure inside the tank is higher than the set value) to prevent overpressure or abnormal liquid level.

[0057] In one embodiment, the vaporization mechanism 27 is a water bath vaporizer;

[0058] The preferred usage process of this utility model is as follows:

[0059] I. Preparations before departure

[0060] 1. Check that the main liquid oxygen pump 21 is powered normally and that all instruments and meters are functioning normally.

[0061] 2. Check that all manual and pneumatic valves are normal, and that the safety valves are normal.

[0062] 3. Ensure that the liquid oxygen storage tank 12 has a capacity of more than 10m³. 3 It meets the requirements for pump start-up.

[0063] 4. The main liquid oxygen pump 21 is operating normally.

[0064] 5. The pressure in the inner cylinder of the first liquid oxygen storage tank 12 is increased to 0.20-0.38 MPa.

[0065] 6. Add sand and filter water to the gasification unit 27 until the liquid level gauge reaches 80%. Add low-pressure steam (0.6 MPa, from the low-pressure steam boiler in the workshop) to the gasification unit 27 to raise the temperature to about 50℃, with a steam pressure of 0.6 MPa and a temperature of 165℃.

[0066] 7. Open the twelfth valve 18 at the liquid oxygen inlet of the main liquid oxygen pump 21 to allow liquid oxygen to enter the main liquid oxygen pump 21 for pre-cooling and to release the vaporized gas formed by the cold pump. When the main liquid oxygen pump 21 returns liquid oxygen through the main gas return pipe 16, close the drain valve.

[0067] 8. Open the main liquid oxygen pump 21 outlet liquid phase pipeline process.

[0068] Normal driving:

[0069] Notify the conversion personnel to make the necessary adjustments and preparations. Then, turn on the speed controller button to connect the main liquid oxygen pump 21 to the power supply. Let the oxygen pump rotate slowly for 2-3 minutes. Press the speed control knob to gradually increase the speed by 5Hz / cycle. Adjust the oxygen flow rate by adjusting the frequency. When the pressure on the oxygen pipe at the outlet of the vaporization mechanism 27 is equal to or slightly greater than the conversion system pressure by 0.2MPa, open the oxygen valve at the outlet of the vaporization mechanism 27 to send oxygen into the system.

[0070] Normal parking:

[0071] 1. Rotate the liquid oxygen pump adjustment knob to gradually reduce the liquid oxygen pump frequency to zero, and then stop the liquid oxygen pump.

[0072] 2. Close the inlet valve of the main liquid oxygen pump 21, the return gas valve at the bottom of the liquid oxygen storage tank, and the main oxygen inlet valve. Open the drain valves on the return gas pipe and outlet pipe to release pressure. After depressurization, close the return gas pipe valve and the pump outlet valve.

[0073] 3. Close the vaporizer steam inlet valve and vent the steam in the pipe.

[0074] 4. Close the liquid oxygen root valve at the bottom of the liquid oxygen storage tank. After the residual oxygen in the booster and pipeline has evaporated, close all valves at the bottom of the storage tank to prevent the regulating valve diaphragm from being damaged.

[0075] Key points for normal operation:

[0076] 1. Dry, oil-free gloves must be worn when operating and maintaining the oxygen pipeline of the vaporization unit.

[0077] 2. When pressurizing the inner cylinder of the liquid oxygen storage tank, all valves after the pressurizer must be opened first, and then the inlet valve of the pressurizer must be opened to avoid pressure buildup in the pipe due to rapid vaporization of liquid oxygen.

[0078] 3. 50m 3 Liquid oxygen storage tank to 30m 3 When replenishing liquid oxygen storage tanks, the smaller the gas phase space inside the cylinder (i.e., the more liquid oxygen stored), the faster the pressure rises. Close attention should be paid to the 30m³ / h depth during operation. 3 The pressure inside the liquid oxygen storage tank can be released by opening the vent valve when the pressure is too high. Overpressure is strictly prohibited.

[0079] 4. Before starting the pump, the liquid oxygen pipeline flow after the pump must be opened. If the valve in the pipeline from the pump outlet to the user is still closed, the pump will quickly build up a very high pressure after it is turned on, which may cause a safety accident.

[0080] 5. After the liquid oxygen pump is working normally, the following phenomena will occur: a. Frost will begin to form on the pump outlet pipeline. b. A slight vibration sound can be heard, indicating that the pump's inlet and outlet valves are working. c. The pressure gauge on the outlet pipeline will show a gradually increasing pressure.

[0081] 6. After confirming that the residual liquid and gas have been completely discharged, all vent valves and exhaust valves that connect to the outside must be closed to prevent water vapor in the air from entering the cold pump. The condensed water vapor may affect the next start-up and cause abnormal wear of the sealing packing.

[0082] 7. If the pump makes an abnormal sound, indicating that excessive pressure has formed in the pressure line, the pump should be stopped immediately and the cause should be found.

[0083] 8. If frost or water forms on the oxygen pipe at the vaporizer outlet, it indicates that the system flow rate may have exceeded the vaporizer's vaporization capacity. The pump speed should be reduced immediately to decrease the flow rate or the pump should be stopped to find the cause.

[0084] 9. Connect the filling hose to the tank truck and liquid oxygen storage tank (tap with a wooden mallet), open the residual liquid discharge valve of the tank truck and liquid oxygen storage tank, flush the hose for 3 minutes, and finish the flushing when the hose is frosted, ensuring that there is no leakage in the filling hose and its connection.

[0085] 10. After filling is complete, close the relevant valves, stop pressurizing the liquid oxygen storage tank, drain the remaining liquid oxygen from the pipe, disconnect the filling hose and retract it. The escort personnel check that the tank truck and liquid oxygen storage tank pipelines, valves, plugs, etc. are in normal condition, retract the triangular wooden blocks, and leave the site according to the designated route.

[0086] Emergency Response:

[0087] 1. Oxygen flow rate in the conversion process continues to decline.

[0088] Check the outlet pressure of the liquid oxygen pump. If the pressure drops, open the local vent valve on the liquid oxygen pump return line until liquid is discharged, while ensuring a 30m... 3 Liquid oxygen storage tank capacity not less than 10m³ 3 The inner cylinder pressure should not be lower than 0.2 MPa. If the flow rate is still insufficient, replace the liquid oxygen pump.

[0089] 2. High pressure during tank filling or self-pressurization.

[0090] When the pressure increases rapidly, the pressure can be released by opening the vent valve inside the liquid oxygen storage tank, and then the pressure can be controlled by adjusting the filling valve or the pressurizing valve.

[0091] 3. High liquid oxygen level in storage tank

[0092] 30m 3 When the liquid level in the storage tank is high, the valve from 50m can be shut off first. 3The replenishment valve of the liquid oxygen storage tank lowers the liquid level when liquid oxygen is needed; 50m 3 The liquid oxygen storage tank has a high liquid level, and is 30m. 3 The storage tank has space and can be filled to 30m. 3 To lower the liquid level in a storage tank, replenishment is required; overfilling and replenishment are strictly prohibited.

[0093] 4. Water frost appears on the oxygen pipe at the outlet of the water bath vaporizer.

[0094] Reduce the frequency of the liquid oxygen pump, decrease the oxygen flow rate, increase the low-pressure steam flow rate into the vaporizer, and raise the water bath vaporizer and outlet oxygen temperatures to normal levels.

[0095] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A liquid oxygen vaporization device, characterized in that: It includes a first liquid oxygen storage tank (12) and at least one second liquid oxygen storage tank (11). The first liquid oxygen storage tank (12) and the second liquid oxygen storage tank (11) are connected by a first pipeline (3). A regulating valve group is provided on the first pipeline (3). The regulating valve group includes a first valve group and a second valve group. A liquid oxygen replenishment pipe (2) is connected to the area between the first valve group and the second valve group on the first pipeline (3). The liquid oxygen replenishment pipe (2) is connected to a liquid oxygen replenishment mechanism (1). The first liquid oxygen storage tank (12) is connected to a pressurization mechanism through a second pipeline. The pressurization mechanism is connected to a vaporization mechanism (27) through a third pipeline. The vaporization mechanism (27) is connected to an oxygen buffer tank.

2. The liquid oxygen vaporization device according to claim 1, characterized in that: The first valve group includes a first valve (4) and a second valve (5), and the second valve group includes a third valve (6), a fourth valve (7) and a fifth valve (8). The first valve (4), the second valve (5), the third valve (6), the fourth valve (7) and the fifth valve (8) are connected in series from the outlet of the second liquid oxygen storage tank (11) to the inlet of the first liquid oxygen storage tank (12).

3. The liquid oxygen vaporization device according to claim 1, characterized in that: The volume of the second liquid oxygen storage tank (11) is greater than the volume of the first liquid oxygen storage tank (12).

4. The liquid oxygen vaporization device according to claim 3, characterized in that: One second liquid oxygen storage tank (11) is provided, and the volume of the second liquid oxygen storage tank (11) is 50m³. 3 The volume of the first liquid oxygen storage tank (12) is 30m³. 3 The pressure inside the second liquid oxygen storage tank (11) is 0.40 MPa to 0.80 MPa, and the pressure inside the first liquid oxygen storage tank (12) is 0.20 MPa to 0.38 MPa.

5. The liquid oxygen vaporization device according to claim 1, characterized in that: The area between the first valve group and the second valve group on the first pipeline (3) is also connected to a fourth pipeline (9), which is connected to the second pipeline, and a sixth valve (10) is provided on the fourth pipeline (9).

6. The liquid oxygen vaporization device according to claim 1, characterized in that: The pressurizing mechanism is also connected to the first liquid oxygen storage tank (12) and the second liquid oxygen storage tank (11) through a return gas pipeline. The return gas pipeline includes a main return gas pipe (16) connected to the pressurizing mechanism. The main return gas pipe (16) is connected to at least two return gas branch pipes (14). Each of the return gas branch pipes (14) is connected to the first liquid oxygen storage tank (12) or the second liquid oxygen storage tank (11). Each return gas branch pipe (14) is equipped with a seventh valve (13). The main return gas pipe (16) is also equipped with a first vent pipe (15).

7. The liquid oxygen vaporization device according to claim 6, characterized in that: The pressurization mechanism includes a main liquid oxygen pump (21) and a secondary liquid oxygen pump (22) connected in parallel. The feed pipes of the main liquid oxygen pump (21) and the secondary liquid oxygen pump (22) are both connected to the second pipeline. The feed pipes of the main liquid oxygen pump (21) and the secondary liquid oxygen pump (22) are respectively equipped with an eighth valve (17) and a ninth valve (18). The discharge pipes of the main liquid oxygen pump (21) and the auxiliary liquid oxygen pump (22) are both connected to the gasification mechanism (27). The discharge port pressures of the main liquid oxygen pump (21) and the auxiliary liquid oxygen pump (22) are 1.50 MPa to 3.55 MPa. The discharge pipes of the main liquid oxygen pump (21) and the auxiliary liquid oxygen pump (22) are respectively equipped with a tenth valve (24) and an eleventh valve (25). The discharge pipes of the main liquid oxygen pump (21) and the auxiliary liquid oxygen pump (22) are each equipped with a spring safety valve (23). The drain pipes of the main liquid oxygen pump (21) and the auxiliary liquid oxygen pump (22) are both connected to the main return gas pipe (16), and the drain pipes of the main liquid oxygen pump (21) and the auxiliary liquid oxygen pump (22) are respectively equipped with a twelfth valve (19) and a thirteenth valve (20).

8. A liquid oxygen vaporization apparatus according to any one of claims 1-7, characterized in that: The vaporization mechanism (27) includes a vaporizer, which includes a steam inlet, a sand filter water inlet, a liquid oxygen inlet, an oxygen outlet, an overflow outlet, and a sewage outlet. The steam inlet is connected to a low-pressure steam source via a fifth pipeline; The sand filter water inlet is connected to a sand filter water source through a sixth pipeline, and fourteen valves are installed on the sixth pipeline; The liquid oxygen inlet is connected to the third pipeline; The oxygen outlet is connected to the oxygen buffer tank via a seventh pipeline.

9. A liquid oxygen vaporization device according to claim 8, characterized in that: The fifth pipeline includes a fifth main pipe (34) and a fifth branch pipe (37) connected in parallel. The fifth main pipe (34) and the fifth branch pipe (37) are respectively equipped with a fifteenth valve (33) and a sixteenth valve (36). The fifth main pipe (34) is also equipped with an electric valve (35). The seventh pipeline includes a seventh main pipe (29) and a seventh branch pipe (32) connected in parallel. The seventh main pipe (29) and the seventh branch pipe (32) are respectively equipped with a seventeenth valve (28) and an eighteenth valve (31). The seventh main pipe (29) is also equipped with a self-regulating valve (30).

10. A liquid oxygen vaporization apparatus according to any one of claims 1-6, characterized in that: A second vent pipe (26) is installed on the third pipeline.

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