Kr-xe extraction air space cold energy buffer and supercooling degree balancing device

Abstract

The utility model relates to the field of krypton xenon extraction technology especially, and more particularly to a kind of krypton xenon extraction air separation cold buffer and supercooling degree balancing device.Its technical scheme includes cold accumulator, heat exchange pipe, adjusting bin and condensing tower, and backwater pipe is installed between the communication of cold accumulator and condensing tower, condensing tower one end is provided with delivery pump, the heat exchange pipe of delivery pump output end is provided with, the adjusting bin is installed in the internal communication of heat exchange pipe upper end, the adjusting bin one end is communicated and is installed with fairing, and the fairing is connected with the adjusting bin and is installed with flow guide pipe.The utility model is provided with adjusting bin in the internal communication of heat exchange pipe part paragraph upper end, when the delivery flow of cooling medium is large, it is stored by cold accumulator recovery, improve the existing air separation system when dealing with raw gas change, it is often difficult to realize the accurate control of supercooling degree, so as to restrict the improvement of krypton xenon extraction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of krypton-xenon extraction technology, and in particular to a krypton-xenon extraction air separation cooling capacity buffer and subcooling balance device. Background Technology

[0002] In the extraction of rare inert gases krypton and xenon, air separation and condensation units are used. When the air separation unit processes raw gas of different concentrations and yields, the distribution and utilization efficiency of its internal cooling capacity will be affected, which in turn affects the effective extraction and purification of krypton and xenon.

[0003] Subcooling control in air separation systems is a key factor in ensuring the accuracy and efficiency of krypton-xenon extraction. Ideal subcooling control can effectively improve the precipitation rate of krypton-xenon at low temperatures. However, existing air separation systems often struggle to achieve precise subcooling control when dealing with changes in feed gas, thus limiting the improvement of krypton-xenon extraction efficiency. To address this issue, we propose a krypton-xenon extraction air separation cooling buffer and subcooling balancing device. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a krypton-xenon extraction air separation cooling capacity buffer and subcooling balance device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a krypton-xenon extraction air separation cold energy buffer and subcooling balance device, comprising a cold storage unit, a heat exchange tube, a regulating chamber, and a condensing tower. A return water pipe is installed between the cold storage unit and the condensing tower. A delivery pump is installed at one end of the condensing tower. A heat exchange tube is installed at the output end of the delivery pump. A regulating chamber is installed inside the upper end of the heat exchange tube. A flow guide is installed at one end of the regulating chamber. A flow guide pipe is installed between the flow guide and the cold storage unit.

[0006] When using the krypton-xenon extraction air separation cold energy buffer and subcooling balance device in this solution, the condenser tower cools the water after the input heat exchange and stores it inside the lower end of the condenser tower. The transfer pump draws cold water from inside the condenser tower and transports it through the heat exchange tube to provide heat exchange medium for the krypton-xenon extraction process in the air separation unit. When the flow rate inside the condenser tower is large, the liquid level inside the heat exchange tube will also change. It enters the guide shroud through the regulating chamber, and then the excess cooling water is transported to the cold accumulator through the guide pipe.

[0007] Preferably, a liquid level sensor is installed on the inner wall of the upper end of the cold accumulator. The liquid level sensor monitors the collected cooling water inside the cold accumulator.

[0008] Preferably, the inner wall of the condensation tower is provided with an mounting plate, and a second liquid level sensor is installed inside the mounting plate. The second liquid level sensor is fixed inside the lower end of the cooling tower by the mounting plate, located above the water storage space inside the lower end of the cooling tower, and monitors the liquid level in the water storage space.

[0009] Preferably, the return water pipe is connected via a return water pump, and the suction end of the return water pump passes through the cold accumulator. The return water pump draws cooling water stored inside the cold accumulator and transports it to the water storage space inside the condenser tower through the return water pipe.

[0010] Preferably, the lower inner wall of the flow guide shroud is provided with a flow guide groove, which is inclined towards the cold accumulator. The flow guide groove guides the cooling water delivered to the heat exchange tube and entering the interior of the flow guide shroud through the regulating chamber towards the lower position of the cold accumulator.

[0011] Preferably, the inner wall of the heat exchange tube is provided with an annular valve seat, and a valve leaf is provided inside the valve seat. Both ends of the valve leaf are rotatably mounted on the valve seat and a valve stem rotatably mounted on the heat exchange tube. The valve seat provides rotatable support for the valve leaf by its outer wall contact. The valve stem rotates within the valve seat and heat exchange tube, providing rotatable support for the valve stem, which in turn provides rotatable support for the valve leaf. Rotating the valve stem causes the valve leaf to rotate, adjusting the opening degree inside the valve seat, and thus adjusting the opening and closing of the heat exchange tube.

[0012] Preferably, the upper end of the heat exchange tube is equipped with a motor whose output end is connected to the valve stem, and both ends of the valve seat are equipped with guide plates connected to the inner wall of the heat exchange tube. When the motor drives the valve stem to rotate, it drives the valve leaf to rotate, and guides the cooling water transported inside the heat exchange tube through the guide plates, avoiding the problem of large flow obstruction when the cooling water flows to the valve seat due to the valve seat radius being smaller than the heat exchange tube radius.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model uses a condenser tower to draw in cooled water, which is then transported through heat exchange tubes to provide a cold source for the air separation unit during the krypton-xenon extraction process. By incorporating a cold storage unit, excess cooling capacity is stored during low-load periods and released during high-load periods. Utilizing the large liquid level buffer space within the main condenser tower, reasonable liquid level control is pre-set during load adjustments in the air separation unit, thereby achieving a dynamic balance of cooling demand. This improves system stability and operating efficiency, effectively mitigating fluctuations during krypton-xenon extraction, and ensuring the stability and continuity of the entire air separation process. Attached Figure Description

[0015] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a top-view three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a rear-view three-dimensional structural diagram of the cold accumulator of this utility model;

[0018] Figure 4 This is a side sectional three-dimensional structural schematic diagram of the air guide cover of this utility model;

[0019] Figure 5 This is a partial three-dimensional cross-sectional view of the heat exchange tube of this utility model.

[0020] Reference numerals in the attached diagram: 1. Return water pipe; 2. Level sensor one; 3. Return water pump; 4. Cold accumulator; 5. Heat exchanger tube; 6. Regulating tank; 7. Transfer pump; 8. Condensation tower; 9. Mounting plate; 10. Level sensor two; 11. Guide pipe; 12. Guide channel; 13. Guide cover; 14. Motor; 15. Valve stem; 16. Valve blade; 17. Guide plate; 18. Valve seat. Detailed Implementation

[0021] 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.

[0022] like Figures 1-5 As shown, the present invention proposes a krypton-xenon extraction air separation cold energy buffer and subcooling balance device, which includes a cold storage 4, a heat exchange tube 5, an regulating chamber 6 and a condensing tower 8. A return water pipe 1 is installed between the cold storage 4 and the condensing tower 8. A delivery pump 7 is installed at one end of the condensing tower 8. A heat exchange tube 5 is installed at the output end of the delivery pump 7. The regulating chamber 6 is installed inside the upper end of the heat exchange tube 5. A flow guide shroud 13 is installed at one end of the regulating chamber 6. A flow guide pipe 11 is installed between the flow guide shroud 13 and the cold storage 4.

[0023] The return water pipe 1 is connected through the return water pump 3, and the suction end of the return water pump 3 passes through the cold storage accumulator 4;

[0024] A flow guide groove 12 is provided on the inner wall of the lower end of the flow guide shroud 13, and the flow guide groove 12 is inclined towards the cold storage 4;

[0025] Based on the implementation steps of Example 1: The fluid after heat exchange with krypton-xenon gas extraction is transported to the condenser tower 8. After cooling by the condenser tower 8, the transfer pump 7 draws in the cooling water after heat exchange. The cooling water is transported through the heat exchange pipe 5 for cooling during the krypton-xenon gas extraction process. When there is a lot of cooling water inside the condenser, the flow rate of the cooling water drawn by the transfer pump 7 is large. When the flow rate of the cooling water is large, the liquid level will overflow the connection between the regulating chamber 6 and the heat exchange pipe 5. The overflowing cooling water is guided and transported through the guide channel 12 and the guide cover 13, and then transported to the cold storage 4 through the guide pipe 11 for storage of cooling water. This regulates the impact of the large flow rate of cooling water on the krypton-xenon gas extraction. At the same time, when the heat exchange effect is insufficient due to insufficient flow rate of the hot water in the krypton-xenon gas extraction, the return water pump 3 draws the cooling water inside the cold storage 4 back to the cooling tower, increases the cooling water inside the condenser tower 8, and increases the flow rate of the condensate water drawn by the heat exchange pipe 5, thereby compensating for the problem of insufficient heat exchange effect during the krypton-xenon gas extraction.

[0026] like Figures 1-5 As shown, compared with Embodiment 1, the krypton-xenon extraction air separation cooling capacity buffer and subcooling balance device proposed in this utility model further includes: a liquid level sensor 2 is provided on the inner wall of the upper end of the accumulator 4.

[0027] The inner wall of the condenser tower 8 is provided with an installation plate 9, and a liquid level sensor 10 is installed inside the installation plate 9;

[0028] The inner wall of the heat exchange tube 5 is provided with an annular valve seat 18, and the valve seat 18 is provided with a valve leaf 16. The upper and lower ends of the valve leaf 16 are rotatably mounted on the valve seat 18 and the valve stem 15 rotatably mounted on the heat exchange tube 5.

[0029] The upper end of the heat exchange tube 5 is equipped with a motor 14 whose output end is connected to the valve stem 15, and both ends of the valve seat 18 are equipped with guide plates 17 that are connected to the inner wall of the heat exchange tube 5.

[0030] In this embodiment, liquid level sensor 12 and liquid level sensor 20 can be selected as guided wave radar liquid level sensors. Liquid level sensor 12 and liquid level sensor 20 emit microwave or radar signals to the liquid surface and measure the liquid level position by receiving the echo. The liquid level height of the cooling water stored inside the cold storage tank 4 and the condenser tower 8 can be determined according to the reflection time of the signal. During the extraction of krypton xenon gas, the heat exchange cooling capacity used is different according to the different concentrations and yields of raw gas processed by the air separation unit. The motor 14 controls the valve stem 15 to rotate, which in turn drives the valve leaf 16 to rotate. The valve leaf 16 rotates inside the valve seat 18, which adjusts the flow rate of cooling water delivered to the valve seat 18 and the heat exchange tube 5, thereby adapting to the air separation unit to process raw gas of different concentrations and yields.

[0031] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A krypton-xenon extraction air separation cold energy buffer and subcooling balancing device, comprising a cold storage unit (4), a heat exchange tube (5), a regulating chamber (6), and a condensing tower (8), characterized in that: A return water pipe (1) is installed between the cold storage (4) and the condensing tower (8). A delivery pump (7) is installed at one end of the condensing tower (8). A heat exchange pipe (5) is installed at the output end of the delivery pump (7). An regulating chamber (6) is installed inside the upper end of the heat exchange pipe (5). A flow guide shroud (13) is installed at one end of the regulating chamber (6). A flow guide pipe (11) is installed between the flow guide shroud (13) and the cold storage (4).

2. The krypton-xenon extraction air separation cooling capacity buffer and subcooling balancing device according to claim 1, characterized in that: A liquid level sensor (2) is installed on the inner wall of the upper end of the cold storage (4).

3. The krypton-xenon extraction air separation cooling capacity buffer and subcooling balancing device according to claim 1, characterized in that: The inner wall of the condenser (8) is provided with an installation plate (9), and a liquid level sensor (10) is provided inside the installation plate (9).

4. The krypton-xenon extraction air separation cooling capacity buffer and subcooling balancing device according to claim 1, characterized in that: The return water pipe (1) is connected through the return water pump (3), and the suction end of the return water pump (3) passes through the accumulator (4).

5. The krypton-xenon extraction air separation cooling capacity buffer and subcooling balancing device according to claim 1, characterized in that: The lower inner wall of the flow guide shroud (13) is provided with a flow guide groove (12), which is inclined toward the cold storage (4).

6. The krypton-xenon extraction air separation cooling capacity buffer and subcooling balance device according to claim 1, characterized in that: The heat exchange tube (5) has an annular valve seat (18) on its inner wall. The valve seat (18) has a valve leaf (16) inside it. The valve leaf (16) is rotatably mounted on the valve seat (18) and the valve stem (15) rotatably mounted on the heat exchange tube (5) at both the upper and lower ends.

7. The krypton-xenon extraction air separation cooling capacity buffer and subcooling balance device according to claim 6, characterized in that: The upper end of the heat exchange tube (5) is provided with a motor (14) whose output end is connected to the valve stem (15), and both ends of the valve seat (18) are provided with guide plates (17) connected to the inner wall of the heat exchange tube (5).

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