A hot and cold circulating oil tank for a hot oil reflux buffer device and a hydrogen-helium separation device
By installing a buffer tank and a filling mesh on top of the cold oil tank to control the flow of heat transfer oil, the problem of rapid temperature rise of the chiller caused by the backflow of high-temperature heat transfer oil was solved, and the stable operation of the chiller was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI FENGSHENG ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-03
AI Technical Summary
During the hot and cold cycle of the alloy adsorption column, the high-temperature heat transfer oil flows back to the chiller, causing the chiller temperature to rise rapidly, exceeding the allowable upper limit, and causing the chiller to shut down.
A buffer tank is installed on top of the cold oil tank, and a filling mesh is installed inside the buffer tank. The flow direction of the heat transfer oil is controlled by a temperature transmitter and a three-way control valve. The high-temperature heat transfer oil first enters the buffer tank to cool down before entering the cold oil tank. The flow rate is controlled by the filling mesh and the overflow pipe to reduce the heating rate of the cold oil tank.
It effectively slows down the temperature rise of the cold oil tank, reduces the load on the chiller, ensures the stable operation of the chiller, and prevents the chiller from shutting down.
Smart Images
Figure CN224454356U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of hot oil reflux buffer devices, specifically a hot and cold circulating oil tank for a hot oil reflux buffer device and a hydrogen-helium separation device. Background Technology
[0002] Helium is an extremely scarce natural resource, primarily used for applications such as airship buoyancy, inert protection, chromatographic analysis, thermal conductivity, leak detection, optical fibers, and diving breathing apparatus. Its abundance on Earth is extremely low; currently proven helium reserves are approximately 49 billion cubic meters, mainly distributed in the United States, Algeria, Qatar, and Russia. my country, however, suffers from a severe shortage of helium resources due to the extremely low helium content of its natural gas (only 0.02%), and has historically relied on imports. With the rapid development of the communications and electronics industries, domestic helium resources are becoming increasingly strained, leading to high prices and making it a very valuable raw material for companies that utilize helium.
[0003] Typically, helium is found as a byproduct of natural gas. However, due to differences in resource endowments worldwide, the helium content in natural gas varies greatly. High-quality natural gas contains over 10% vol, while those with high industrial extraction value generally contain over 0.5% vol. Conversely, some natural gas contains less than 50 ppmv, making industrial development extremely difficult and costly. In my country, the helium content in most domestic natural gas fields is less than 0.1% vol (1000 ppmv), with common averages ranging from 200 to 500 ppmv.
[0004] To address the challenges of high development technology and costs caused by the low helium content in my country's raw natural gas, the most mainstream method currently used domestically is to extract boiled off-gas (BOG) from liquefied natural gas. This involves almost complete liquefaction of CH4, while gases with lower boiling points, such as N2, H2, and He, remain unliquefied. Through one or more flash evaporations, the concentration of these non-condensable gases relative to their respective proportions in the raw natural gas is significantly increased. Essentially, these unliquefied non-condensable gases, especially hydrogen and helium, are concentrated 10-20 times, achieving a helium concentration suitable for industrial development.
[0005] Among domestic and international helium extraction methods for BOG (Boiled Ocean Gas) projects, the main hydrogen-helium separation methods include hydrogenation catalytic oxidation and alloy hydrogen-helium separation. In the alloy hydrogen-helium separation method for BOG helium extraction, the alloy adsorption column needs to operate under thermal cycling. After the alloy adsorption column is regenerated by heating with high-temperature heat transfer oil, low-temperature heat transfer oil needs to be introduced for cooling. During this process, the high-temperature heat transfer oil remaining in the heat transfer oil jacket of the alloy adsorption column will flow into the cryogenic tank of the chiller in a short time, causing the cryogenic temperature to rise rapidly, even exceeding the chiller's allowable upper limit, leading to chiller shutdown. Utility Model Content
[0006] The purpose of this utility model is to provide a hot oil reflux buffer device and a hot and cold circulating oil tank for a hydrogen-helium separation device in order to solve at least one of the above-mentioned technical problems.
[0007] In a first aspect, this utility model provides a hot oil reflux buffer device applied to the cold oil tank of a hydrogen-helium separation unit; comprising: a temperature transmitter, a three-way control valve, and a buffer tank; wherein, the three ports of the three-way control valve are respectively connected to the oil return port, the oil inlet pipe of the buffer tank, and the oil return pipe of the cold oil tank; the temperature transmitter is disposed on the oil return port and is electrically connected to the three-way control valve; the oil return pipe of the cold oil tank is connected to the interior of the cold oil tank, the oil inlet pipe of the buffer tank is connected to the interior of the buffer tank, the buffer tank is disposed on the top of the cold oil tank, and the bottom of the buffer tank is connected to the top of the cold oil tank through the oil outlet of the buffer tank; the interior of the buffer tank is provided with a filling mesh and an overflow pipe, and the bottom of the overflow pipe is connected to the top of the cold oil tank.
[0008] Optionally, the oil inlet pipe of the buffer tank is located at the upper part of the side wall of the buffer tank.
[0009] Optionally, the filling mesh includes a stainless steel filling mesh.
[0010] Optionally, the filling mesh is installed inside the lower part of the buffer tank, and the filling height of the filling mesh is lower than the lower edge of the oil inlet pipe of the buffer tank.
[0011] Optionally, the upper opening of the overflow pipe is higher than the filling height of the filling mesh, and the lower opening of the overflow pipe passes through the bottom of the buffer tank and communicates with the inner top of the cold oil tank.
[0012] Optionally, the inner diameter of the oil outlet of the buffer tank is smaller than the inner diameter of the oil inlet pipe of the buffer tank.
[0013] Optionally, the inner diameter of the overflow pipe is larger than the inner diameter of the oil inlet pipe of the buffer tank.
[0014] Secondly, this utility model embodiment also provides a hot and cold circulating oil tank for a hydrogen-helium separation device, including a cold oil tank and a hot oil reflux buffer device provided in this utility model embodiment.
[0015] This utility model provides a hot oil reflux buffer device and a hot and cold circulating oil tank for a hydrogen-helium separation device. A buffer tank is set on the top of the cold oil tank, and a filling mesh is set inside the buffer tank. When the refluxed hot oil exceeds the set temperature, the hot oil is passed into the buffer tank to cool down before flowing into the cold oil tank. This can effectively slow down the temperature rise of the cold oil tank, reduce the load on the chiller, and ensure the stable operation of the chiller. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of a hot oil reflux buffer device provided in an embodiment of the present invention.
[0018] In the diagram: 1. Cold oil tank, 2. Temperature transmitter, 3. Three-way control valve, 4. Buffer tank, 5. Oil return port, 6. Oil inlet pipe of buffer tank, 7. Oil return pipe of cold oil tank, 8. Oil outlet of buffer tank, 9. Filler mesh, 10. Oil overflow pipe. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.
[0020] Figure 1 This is a structural schematic diagram of a hot oil reflux buffer device according to an embodiment of the present utility model. Figure 1 As shown, the device is used in the cold oil tank 1 of the hydrogen-helium separation unit, and specifically includes: a temperature transmitter 2, a three-way control valve 3, and a buffer tank 4.
[0021] Specifically, the three ports of the three-way control valve 3 are connected to the return oil port 5, the buffer tank inlet pipe 6, and the cold oil tank return oil pipe 7, respectively; the temperature transmitter 2 is installed on the return oil port 5 and is electrically connected to the three-way control valve 3.
[0022] Temperature transmitter 2 is used to monitor the temperature of the heat transfer oil flowing through return port 5, and controls the three-way control valve 3 to operate according to the temperature of the heat transfer oil, so as to control the connection between return port 5 and buffer tank inlet pipe 6, or control the connection between return port 5 and cold oil tank return pipe 7.
[0023] Specifically, when the temperature monitored by the temperature transmitter 2 at the oil return port 5 exceeds the first preset temperature threshold, such as 100°C, the three-way control valve 3 is activated to connect the oil return port 5 with the oil inlet pipe 6 of the buffer tank, so that the heat transfer oil is introduced into the oil inlet pipe 6 of the buffer tank on one side of the buffer tank 4 and enters the buffer tank 4.
[0024] When the temperature monitored by temperature transmitter 2 at oil return port 5 is lower than the second preset temperature threshold, for example, 80°C, the three-way control valve 3 is activated again to connect oil return port 5 with cold oil tank return pipe 7, allowing heat transfer oil to be directly delivered into cold oil tank 1 via cold oil tank return pipe 7. The second preset temperature threshold is lower than the first preset temperature threshold.
[0025] The cold oil tank return pipe 7 is connected to the inside of the cold oil tank 1, and the buffer tank inlet pipe 6 is connected to the inside of the buffer tank 4. The buffer tank 4 is located on the top of the cold oil tank 1, and the bottom of the buffer tank 4 is connected to the top of the cold oil tank 1 through the buffer tank outlet 8.
[0026] Specifically, the oil inlet pipe 6 of the buffer tank is located on the upper part of the side wall of the buffer tank 4.
[0027] The buffer tank 4 is equipped with a filling mesh 9 and an oil overflow pipe 10. The bottom of the oil overflow pipe 10 is connected to the top of the cold oil tank 1.
[0028] Preferably, the filler mesh 9 comprises a stainless steel filler mesh.
[0029] Specifically, the filler mesh 9 is installed inside the buffer tank 4 at the lower position, and the filling height of the filler mesh 9 is lower than the lower edge of the inlet of the oil inlet pipe 6 of the buffer tank. For example, the filling height of the filler mesh 9 is 5cm lower than the lower edge of the inlet of the oil inlet pipe 6 of the buffer tank, which is used to prevent dangerous situations such as splashing when the high-temperature heat transfer oil is introduced into the buffer tank, and also to a certain extent to pre-cool the high-temperature heat transfer oil. After being buffered by the filler mesh 9, the high-temperature heat transfer oil flows out from the oil outlet 8 of the buffer tank on the other side of the buffer tank 4.
[0030] Preferably, the inner diameter of the oil outlet 8 of the buffer tank is smaller than the inner diameter of the oil inlet pipe 6 of the buffer tank.
[0031] In one optional embodiment of this utility model, the inner diameter of the oil outlet 8 of the buffer tank is less than 1 / 6 of the inner diameter of the oil inlet pipe 6 of the buffer tank, so that the flow rate of the high-temperature heat transfer oil into the cold oil tank 1 after passing through the buffer tank 4 is reduced, thereby reducing the influence of the high-temperature heat transfer oil on the temperature inside the cold oil tank 1.
[0032] Specifically, the upper opening of the overflow pipe 10 is higher than the filling height of the filling mesh 9, and the lower opening of the overflow pipe 10 passes through the bottom of the buffer tank 4 and connects to the top of the interior of the cold oil tank 1. When the heat transfer oil level in the buffer tank 4 exceeds the upper opening of the overflow pipe 10, the heat transfer oil flows into the cold oil tank 1 through the overflow pipe 10.
[0033] Preferably, the inner diameter of the overflow pipe 10 is larger than the inner diameter of the buffer tank inlet pipe 6.
[0034] In one optional embodiment of this utility model, the inner diameter of the overflow pipe 10 is 1.2 times larger than the inner diameter of the buffer tank inlet pipe 6. This setting can ensure that the overflow flow is large enough under abnormal conditions.
[0035] This utility model also provides a hot and cold circulating oil tank for a hydrogen-helium separation device, including a cold oil tank and a hot oil reflux buffer device provided in the embodiments of this utility model.
[0036] As described above, this utility model provides a hot oil reflux buffer device and a hot and cold circulating oil tank for a hydrogen-helium separation device. A buffer tank is set on the top of the cold oil tank, and a filling mesh is set inside the buffer tank. When the refluxed hot oil exceeds the set temperature, the hot oil is passed into the buffer tank to cool down before flowing into the cold oil tank. This can effectively slow down the temperature rise of the cold oil tank, reduce the load on the chiller, and ensure the stable operation of the chiller.
[0037] 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.
[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A hot oil return buffer apparatus, characterized by, A cold oil tank used in a hydrogen-helium separation unit; comprising: a temperature transmitter, a three-way control valve, and a buffer tank; wherein, The three ports of the three-way control valve are respectively connected to the return oil port, the buffer tank inlet pipe, and the cold oil tank return oil pipe; the temperature transmitter is installed on the return oil port and is electrically connected to the three-way control valve. The return oil pipe of the cold oil tank is connected to the inside of the cold oil tank, the inlet oil pipe of the buffer tank is connected to the inside of the buffer tank, the buffer tank is located at the top of the cold oil tank, and the bottom of the buffer tank is connected to the top of the cold oil tank through the oil outlet of the buffer tank. The buffer tank is equipped with a filling mesh and an oil overflow pipe inside, and the bottom of the oil overflow pipe is connected to the top of the cold oil tank.
2. The hot oil reflux buffer apparatus of claim 1, wherein: The oil inlet pipe of the buffer tank is located on the upper part of the side wall of the buffer tank.
3. The hot oil return buffer of claim 1, wherein: The filling mesh includes stainless steel filling mesh.
4. The hot oil return buffer of claim 1, wherein: The filling mesh is installed inside the lower part of the buffer box, and the filling height of the filling mesh is lower than the lower edge of the oil inlet pipe of the buffer box.
5. The hot oil return buffer apparatus of claim 1, wherein: The upper opening of the overflow pipe is higher than the filling height of the filling mesh, and the lower opening of the overflow pipe passes through the bottom of the buffer tank and communicates with the inner top of the cold oil tank.
6. The hot oil return buffer apparatus of claim 1, wherein: The inner diameter of the oil outlet of the buffer tank is smaller than the inner diameter of the oil inlet pipe of the buffer tank.
7. The hot oil return buffer apparatus of claim 1, wherein: The inner diameter of the overflow pipe is larger than the inner diameter of the oil inlet pipe of the buffer tank.
8. A cold and hot cycle oil tank for a hydrogen-helium separation device, characterized by, It includes a cold oil tank and a hot oil reflux buffer device as described in any one of claims 1-7.