Water cooling jacket structure and application device

Abstract

The application discloses a water cooling jacket structure and an application device, and relates to the technical field of water cooling jacket structures. The water cooling jacket structure comprises water outlets and water inlets arranged at the upper and lower ends of the water cooling jacket respectively; a plurality of annular partition plates are arranged in the water cooling jacket at intervals, and are used for dividing the water cooling jacket into a plurality of annular areas; one end of each partition plate is sealingly and fixedly connected with the outer wall of the water cooling jacket, and the other end of each partition plate is inclined upward and leaves a gap between the inner wall of the water cooling jacket, so as to form a first water flow channel close to the inner wall; a plurality of circumferentially-distributed through holes are formed in each partition plate, and are used for forming a second water flow channel connecting two adjacent annular areas; and the cross-sectional area of the first water flow channel is larger than that of the second water flow channel. The application can improve the cooling effect, reduce the consumption of cooling water, is environment-friendly, has a simple structure, is easy to manufacture, and is low in cost.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cooling and heat dissipation, and relates to the technical field of natural gas cracking for producing acetylene, in particular to a water cooling jacket structure and an application device. BACKGROUND

[0002] The natural gas partial oxidation method is a method for cracking acetylene by using a part of raw natural gas to burn with oxygen to provide a large amount of heat for another part of natural gas cracking. The method and production device are shown in the Chinese patent document with the publication number CN107261993B. The temperature of the reaction chamber combustion is very high, which can reach 1300 to 1500℃. The side wall of the reaction chamber is provided with a cavity, and the outer wall is provided with a water inlet and a water outlet to form a water cooling jacket structure, and the inner wall of the reaction chamber is cooled by flowing water into the water cooling jacket. The problem is that water vaporization easily occurs in the water cooling jacket and forms gas blockage, which worsens heat transfer and further causes the reaction chamber to burn out. Since the inner wall of the reaction chamber directly contacts the heat source, the risk of the inner wall being burned out is higher.

[0003] In the prior art, in order to improve the heat exchange efficiency of the water cooling jacket, a device such as the Chinese patent "Combustor water cooling jacket device" with the publication number CN205642076U is used. This kind of device sets multiple partitions in the water cooling jacket to force the water to flow in a meandering way, which increases the path length of the water flow to increase the opportunity of heat exchange and thus improve the heat exchange efficiency. The problem of this kind of device is that it does not overcome the gas blockage problem caused by water vaporization, and after the water flow path is lengthened, water vaporization is more likely to occur and gas blockage is more likely to occur. Especially for the production of acetylene by the natural gas partial oxidation method, the combustion time is long, and gas blockage is more likely to occur. In order to overcome the above-mentioned water vaporization phenomenon, it is necessary to increase the water flow to improve the cooling efficiency, but this leads to the problem of increased consumption of cooling water and increased cost. SUMMARY

[0004] In order to overcome the deficiencies in the prior art, the inventors have found that there is a temperature difference between the inner wall and the outer wall of the water cooling jacket, and the heat convection caused by the temperature difference causes vortex flow in the water cooling jacket during the flow process. The water in the center of the vortex flow hardly participates in the water circulation and becomes "dead water". The steam generated by water vaporization in the dead water easily accumulates to form bubbles, and the bubbles further accumulate to form gas blockage. Since the heat absorption capacity of water vapor is greatly reduced, the inner wall of the water cooling jacket is burned out. The present application provides a water cooling jacket structure and an application device. The purpose is to protect the inner wall of the water cooling jacket from being burned out, and to improve the heat absorption efficiency as the original intention, to improve the ability of cooling water to absorb heat from the inner wall of the water cooling jacket, to achieve the purpose of improving the cooling effect while reducing the consumption of cooling water.

[0005] To achieve the above object, the present application provides the following technical solutions: a water cooling jacket structure; a water outlet and a water inlet are arranged at the upper and lower ends of the water cooling jacket respectively, and cooling water flows from bottom to top in the water cooling jacket; a plurality of annular partition plates are arranged in the water cooling jacket at intervals, for dividing the water cooling jacket into a plurality of annular regions; one end of each partition plate is sealingly and fixedly connected to the outer wall of the water cooling jacket, and the other end thereof is inclined upward and leaves a gap with the inner wall of the water cooling jacket, for forming a first water flow channel penetrating upward and downward and completely wrapping the inner wall near the inner wall; a plurality of through holes are arranged on each partition plate at intervals in the circumferential direction, for forming a second water flow channel connecting two adjacent annular regions; and the cross-sectional area of the first water flow channel is greater than that of the second water flow channel.

[0006] As further optimization, the through holes are arranged away from the gap on the partition plate.

[0007] As further optimization, a plurality of supporting blocks are fixedly connected to the inner wall; the supporting blocks are divided into a plurality of layers, and the supporting blocks in each layer are arranged at intervals in the circumferential direction; the supporting blocks in each layer correspond to one partition plate, and the end of the partition plate abuts against the side surface of the supporting blocks to form the gap.

[0008] As further optimization, the end of the partition plate towards the inner wall is provided with an upward folded edge portion; and the outer side of the folded edge portion abuts against the side surface of the supporting blocks.

[0009] As further optimization, the partition plates are arranged at intervals.

[0010] As further optimization, a water collecting chamber is arranged at the lower part of the water cooling jacket; the water collecting chamber is hollow and annular in shape, and is arranged at the bottom of the water cooling jacket; the water inlet is arranged on the outer wall of the water collecting chamber; a plurality of water distribution holes are arranged on the outer wall of the water cooling jacket corresponding to the position of the water collecting chamber, for uniformly distributing the cooling water in the water collecting chamber to the water cooling jacket.

[0011] As further optimization, the water cooling jacket is made of metal material.

[0012] As further optimization, the metal material is stainless steel.

[0013] The present application also provides an application device comprising the water cooling jacket structure as described above.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] (1) The water flow is forced to flow near the inner wall of the water cooling jacket at high speed, thereby improving the cooling effect, reducing the consumption of cooling water, being environmentally friendly, and reducing the cost.

[0016] (2) The slight gasification evaporation improves the heat absorption capacity and the heat dissipation effect, the bubbles generated by the gasification can be automatically discharged and are not easy to gather, thereby reducing the risk of air blockage.

[0017] (3) The technical prejudice that the faster the water flow, the better the heat dissipation effect, and the slower the water flow, the easier the air blockage is overcome by the intentionally set dead water area. Thus, the unexpected technical effects of better heat dissipation effect and water saving are achieved.

[0018] In summary, the device improves the cooling effect while reducing the consumption of cooling water, is environmentally friendly, and has a simple structure, easy to manufacture, and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of embodiment 1 of the present application;

[0020] Figure 2 is a structural schematic diagram of the water distribution hole of embodiment 1 of the present application;

[0021] Figure 3 is a schematic diagram of the heat dissipation effect of the inner wall 1 of the first scheme of embodiment 1 of the present application;

[0022] Figure 4 is a schematic diagram of the heat dissipation effect of the inner wall 1 of the second scheme of embodiment 1 of the present application;

[0023] Figure 5 is a measurement result chart of the first scheme and the second scheme of embodiment 1 of the present application;

[0024] Figure 6 is a partial structural schematic diagram of the through hole of embodiment 1 of the present application.

[0025] In the figure: 1 inner wall; 11 support block; 12 high temperature area; 2 outer wall; 3 water outlet; 4 water inlet; 5 partition; 51 gap; 52 through hole; 53 folded edge part; 54 annular area; 6 water collecting chamber; 61 water distribution hole. Among them, the arrow indicates the water flow direction. DETAILED DESCRIPTION

[0026] The present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the preferred embodiments of the present application, rather than all. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0027] Example 1: Please refer to Figures 1-6 ;

[0028] An acetylene cracking furnace burner with a water cooling jacket structure is applied to a heating furnace device, the furnace wall comprises a ring-shaped side wall to protect the side wall from burning out, the furnace wall comprises the water cooling jacket structure, the furnace wall can withstand high temperature, and the furnace wall material can be selected from glass, metal, ceramic and the like, but preferably steel, which has better thermal conductivity and is beneficial to heat conduction. Further, it is applied to an acetylene cracking furnace reaction chamber. The combustion temperature of the reaction chamber is 1300-1500 DEG C, and the furnace wall material is preferably stainless steel. The following solid connection can be understood as including a welding connection mode.

[0029] The water cooling jacket structure is used to protect the inner wall 1 of the water cooling jacket from being burned out by high temperature, which comprises an inner wall 1 and an outer wall 2, and the upper and lower ends of the inner wall 1 and the outer wall 2 are closed to form a water cooling jacket with a cavity; the water outlet 3 and the water inlet 4 are arranged at the upper and lower ends of the water cooling jacket respectively, and the cooling water flows from bottom to top in the water cooling jacket; as can be seen, the water is fed from the bottom and discharged from the top, which can ensure that the cooling water fills the water cooling jacket and ensures the cooling effect.

[0030] A plurality of annular partitions 5 are arranged in the water cooling jacket, which are arranged at intervals and are used to divide the water cooling jacket into a plurality of annular regions 54; one end of each of the partitions 5 is sealingly and fixedly connected to the outer wall 2 of the water cooling jacket, and the other end is inclined upward and has a gap 51 between the inner wall 1 of the water cooling jacket, which is used to form a first water flow channel which completely wraps the inner wall 1 and penetrates upward and downward; as can be seen, the first water flow channel is a water flow channel which is close to the inner wall 1 and has a ring-shaped cross section, and it is the main channel of the water flow to ensure that most of the cooling water flows at high speed close to the inner wall 1.

[0031] Each of the partitions 5 is provided with a plurality of through holes 52 which are uniformly distributed in the circumferential direction; which are used to form a second water flow channel which communicates with two adjacent annular regions 54; the cross-sectional area of the first water flow channel is greater than that of the second water flow channel. As can be seen, the second water flow channel is used to communicate each of the annular regions 54, and a small part of the cooling water passes through each of the annular regions 54 from bottom to top layer by layer to ensure that the water in each of the annular regions 54 keeps flowing rather than being completely static dead water. Among them, the cross-sectional area of the second water flow channel is the sum of the areas of all the through holes 52 on the same partition 5. The cross-sectional area of the first water flow channel is the area of the annular gap 51 between the same partition 5 and the inner wall 1.

[0032] The working principle at least includes, first, the temperature of the reaction chamber is about 1300 to 1500 ℃, the heat on the inner wall 1 of the water cooling jacket is high, so the main goal is to cool the inner wall 1. The cooling water mainly flows at high speed on the side close to the inner wall 1 through the first water flow channel, which can quickly take away the heat and improve the cooling effect; second, the temperature of the inner wall 1 is very high, although the flow rate of the water flow is very high, but part of the water is gasified to form tiny bubbles; however, unexpectedly, the heat absorbed by the water vaporization is much higher than the heat absorbed by the water heating. For ease of understanding, the heat of vaporization of water is about 2260 KJ / Kg, and the heat absorbed by heating 1 kg of water from 25 ℃ to 100 ℃ is about 31.5 KJ. Therefore, the slight evaporation effect is more conducive to cooling; at the same time, under the action of the high-speed water flow in the first water flow channel, the tiny bubbles are quickly taken away and discharged from the water outlet 3, and are not easy to gather in the water cooling jacket, so as not to form air resistance. Third, the gasification produces bubbles, part of which directly exits the water cooling jacket along the first water flow channel with high-speed water flow, and the other part enters the bubbles in the annular area 54 and is collected along the inclined bottom surface of the baffle 5 into the first water flow channel and then discharged out of the water cooling jacket. It can be seen that the higher the water flow rate, the lower the pressure, and each annular area 54 close to the first water flow channel is a low-pressure area, and the bubbles in each annular area 54 can automatically approach the first water flow channel, and will not gather too much in the annular area 54 to form air resistance. Fourth, the baffle 5 and the outer wall 2 of the water cooling jacket are sealingly connected without gap 51, and a small amount of "dead water area" is easily formed. However, these dead water areas are not structural defects. Because, in addition to cooling the inner wall 1, using less water to achieve the purpose is the best solution. The inner wall 1 is made of stainless steel, and the temperature of the inner wall 1 is kept below 600 ℃. The water close to the "dead water area" of the outer wall 2 of the water cooling jacket can also play a certain heat conduction role, and reduces the unnecessary water flow, so as to reduce the cooling water consumption. Fifth, the multiple spaced baffles 5 also play the role of heat dissipation fins, which transfer the heat of the inner wall 1 to the outer wall 2 of the water cooling jacket through heat conduction, and also improve the heat dissipation capacity. Sixth, the through hole 52 can provide a driving force from bottom to top for the dead water in the annular area 54, so as to speed up the movement of the bubbles to the first water flow channel, and further reduce the risk of bubble gathering. Seventh, the baffle 5 with one end fixed is a cantilever structure, and the baffle 5 itself has a certain elastic deformation ability, so that the end close to the inner wall 1 has the ability to swing freely, and can adapt to the local and temporary pressure rise situation; in other words, if the pressure in a certain annular area 54 rises, it can drive the end of the upper baffle 5 to swing slightly upward, so as to expand the gap 51, so that the pressure can be automatically released; so that each annular area 54 has the pressure automatic adaptation ability.

[0033] To further improve the dead water driving force of the annular area 54, the through hole 52 is arranged away from the gap 51 on the partition plate 5. In other words, the closer the through hole 52 is to the outer wall 2 of the water jacket, the more difficult it is for bubbles to gather in the annular area 54, and the lower the risk of air resistance.

[0034] The key technical means is to ensure the stability of the gap 51, and a plurality of supporting blocks 11 are fixedly connected to the inner wall 1. The plurality of supporting blocks 11 are divided into multiple layers, and the supporting blocks 11 in each layer are uniformly distributed in the circumferential direction. Each layer of supporting blocks 11 corresponds to one partition plate 5, and the end of the partition plate 5 abuts against the side surface of the supporting block 11 to form the gap 51. As can be seen, the gap 51 is supported by the supporting block 11, which can ensure that it is not closed.

[0035] To further improve the supporting effect of the supporting block 11, the end of the partition plate 5 towards the inner wall 1 is provided with an upward folded edge portion 53; the folded edge portion 53 abuts against the side surface of the supporting block 11. When the partition plate 5 slightly swings, it is easy to go up and is blocked from going down, so that the gap 51 is more stable.

[0036] For example, the plurality of partition plates 5 are uniformly spaced apart. This helps to keep the pressure of each annular area 54 equal, which is conducive to protecting the stability of the water flow in the first water flow channel.

[0037] To improve the uniformity of water flow distribution, a water collecting chamber 6 is arranged at the lower part of the water jacket; the inside of the water collecting chamber 6 is hollow, and the shape thereof is annular, and the water collecting chamber 6 is sleeved on the bottom of the water jacket; the water inlet 4 is arranged on the outer wall of the water collecting chamber 6, and a plurality of circumferentially distributed water distribution holes 61 are arranged on the outer wall 2 of the water jacket corresponding to the position of the water collecting chamber 6, which are used to uniformly distribute the cooling water in the water collecting chamber 6 to the water jacket. As can be seen, when the cooling water enters the water jacket from one or two inlets, it is easy to cause uneven distribution of the cooling water at the inlet. A water collecting chamber 6 is used as a buffer first, and then the cooling water is distributed by a porous structure when it enters the water jacket from the water collecting chamber 6, so as to achieve the purpose of uniform distribution.

[0038] In use, the water jacket with the above-mentioned partition plate 5 is taken as a first scheme, and the water jacket without the partition plate 5 is taken as a second scheme for comparison of heat dissipation effect. The heat dissipation effect of the inner wall 1 of the first scheme is as shown in Figure 3 , and the heat dissipation effect of the inner wall 1 of the second scheme is as shown in Figure 4 . As can be seen, the first scheme has less high-temperature area 12 of the inner wall 1, which indicates that the temperature is lower and is uniformly distributed; while the second scheme has more high-temperature area 12, which indicates that the temperature is high and is not uniformly distributed, which is easy to cause local overheating and be burned out. Further measurement is shown in Table 5, and compared with the second scheme without the partition plate 5, the cooling effect of the first scheme is improved by 36% from the perspective of average temperature.

[0039] Compared with the prior art, the above embodiments have the following advantages:

[0040] (1) The water flow is forced to flow close to the inner wall 1 of the water cooling jacket at high speed, improving the cooling effect while reducing the consumption of cooling water, being environmentally friendly, and reducing costs.

[0041] (2) The slight gasification and evaporation improves the heat absorption capacity and the heat dissipation effect, the bubbles generated by gasification can be automatically discharged and are not easy to gather, reducing the risk of air blockage.

[0042] (3) By intentionally setting a dead water area, the technical prejudice that the faster the water flow, the better the heat dissipation effect, and the slower the water flow, the easier it is to form air blockage is overcome. Thus, unexpected technical effects of better heat dissipation effect and water saving are achieved.

[0043] In summary, the device improves the cooling effect while reducing the consumption of cooling water, is environmentally friendly, and has a simple structure, easy to manufacture, and low cost.

[0044] The part of the present application not described in detail is the prior art; for those skilled in the art, the technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

Claims

1. A water jacket structure, comprising a water outlet (3) and a water inlet (4) arranged at the upper and lower ends of the water jacket respectively, for cooling water to flow from bottom to top in the water jacket; characterized in that: a plurality of annular partitions (5) are arranged in the water jacket at intervals, for dividing the water jacket into a plurality of annular regions (54); one end of each of the partitions (5) is sealingly and fixedly connected to the outer wall (2) of the water jacket, and the other end thereof is inclined upward and leaves a gap (51) with the inner wall (1) of the water jacket, for forming a first water flow channel penetrating through the upper and lower annular regions (54) of the partition (5) close to the inner wall (1); a plurality of through holes (52) are arranged in each of the partitions (5) at intervals in the circumferential direction, for forming a second water flow channel connecting the upper and lower annular regions (54) of the partition (5); the cross-sectional area of the first water flow channel is greater than that of the second water flow channel. The through holes (52) are arranged away from the gap (51) on the partition (5). A plurality of supporting blocks (11) are fixed to the inner wall (1); the supporting blocks (11) are divided into a plurality of layers, and the supporting blocks (11) in each layer are arranged at intervals in the circumferential direction; the supporting blocks (11) in each layer correspond to one of the partitions (5), and the end of the partition (5) is abutted against the side surface of the supporting blocks (11) to form the gap (51). The end of the partition (5) facing the inner wall (1) is provided with an upward folded edge portion (53); the outer side of the folded edge portion (53) is abutted against the side surface of the supporting blocks (11). The partitions (5) are arranged at intervals.

2. The water jacket structure according to claim 1, characterized by: A water collecting chamber (6) is arranged at the lower part of the water jacket; the water collecting chamber (6) is hollow and has an annular shape, and is arranged at the bottom of the water jacket; the water inlet (4) is arranged on the outer wall of the water collecting chamber (6), and a plurality of water distribution holes (61) are arranged on the outer wall (2) of the water jacket corresponding to the position of the water collecting chamber (6) at intervals in the circumferential direction, for uniformly distributing the cooling water in the water collecting chamber (6) to the water jacket.

3. A water jacket structure according to claim 2, characterized by: The water jacket is made of metal.

4. A water jacket structure according to claim 3, characterized by: The metal is stainless steel.

5. A water jacket structure according to claim 4, characterized by: The application further relates to the water jacket structure according to any one of claims 1 to 8.

6. A water jacket structure according to claim 5, characterized by: The application device is an acetylene cracking furnace reaction chamber.

7. A water jacket structure according to claim 6, characterized by: ​ 8. A water jacket structure according to claim 7, characterized by: ​ 9. An application apparatus characterized by comprising: ​ 10. The application apparatus of claim 9, wherein: ​

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