A high-pressure fluid pipeline heater and fluid heat exchange method

Abstract

The present invention relates to the technical field of fluid heating equipment, and specifically to a high-pressure fluid pipeline heater and a fluid heat exchange method. The fixed support body and the guide cylinder in the outer shell of the heater effectively control the fluid path of the fluid to be heated in the heater, so that the internal heat exchange structure of the heater is simple, and the cold high-pressure fluid entering the heater flows from the outside to the inside in the heater for heat exchange. During the heating process, the temperature of the fluid gradually increases from the periphery to the center, thereby improving the reliability of the heat exchange operation. Finally, the heated fluid flows out from the outlet located at the center of the interface end flange. The present invention heats the heat exchanger assembly through the heating pipe, so that the fluid flowing through the heat exchanger assembly can be effectively heated, avoiding the limitation of the heating temperature. The heat exchanger assembly is integrally sleeved on the outer wall of the heating pipe. When the heater fails, it is also convenient to replace the heat exchanger assembly. The various components of the heater can be conveniently disassembled and assembled, and the maintenance and installation are simple.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid heating equipment, in particular to a high-pressure fluid pipeline heater and a fluid heat exchange method. Background Art

[0002] The basic principle of pipeline fluid (liquid or gas) heater is to make the fluid to be heated flow through the pipeline with heating element, and dynamically exchange heat between the fluid to be heated and the high-temperature heating element, so that the fluid reaches a predetermined temperature at the outlet of the heater. Usually, this heating method has high requirements on heating efficiency and large power consumption due to the short residence time of the fluid in the pipeline. In particular, when it is necessary to heat the high-pressure fluid to a higher temperature, the pipeline shell structure is limited by the material use temperature, which makes it have a high safety risk, and greatly increases the technical difficulty and manufacturing cost.

[0003] In order to quickly raise the temperature of the fluid in the pipe heater, the existing technology mainly adopts the technical approach of increasing the contact area between the fluid and the heating element. The disadvantage is that the structure of the heating element is complicated (such as using a spirally wound electric heating tube, etc.), and the power consumption is large. There are problems such as poor working reliability and difficulty in maintenance and replacement during use. In addition, when the existing pipe heater heats the high-pressure fluid for a long time, the pipe shell will gradually increase with the temperature of the heated fluid. Under long-term high-pressure conditions, in order to ensure the pressure-bearing capacity of the pipe, the maximum heating temperature of the fluid is limited by the pipe shell material and thermal protection, which makes it difficult to meet the demand of heating the high-pressure fluid to a higher temperature. Summary of the invention

[0004] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a high-pressure fluid pipeline heater and a fluid heat exchange method to solve the technical problems of the existing pipeline heater when heating the high-pressure fluid, such as limited heating temperature, complex structure, poor working reliability and difficult maintenance and replacement.

[0005] The present invention is achieved through the following technical solutions:

[0006] A high-pressure fluid pipeline heater, comprising a heater outer shell, a flow guide cylinder, a heat exchanger assembly, a heating tube and two groups of fixed supports; the two ends of the heater outer shell are respectively equipped with a heating tube end flange and a fluid interface end flange; the flow guide cylinder is sleeved in the heater outer shell, and a first fluid channel is formed between the flow guide cylinder and the heater outer shell, and two groups of fixed supports are respectively fixed to the two ends of the flow guide cylinder in the heater outer shell, and through holes are provided on the two groups of fixed supports, wherein a second fluid channel is formed between the side wall of the fixed support close to the side of the fluid interface end flange and the side wall of the fluid interface end flange; The second fluid channel is communicated with the first fluid channel, the heat exchanger assembly is sleeved in the guide cylinder, the heating tube passes through the through hole of the fixed support body through the heating tube end flange and is sleeved in the heat exchanger assembly, and there is a gap between the end of the heating tube and the fixed support body near the flange side of the fluid interface end, a third fluid channel is formed in the heat exchanger assembly, the third fluid channel is communicated with the first fluid channel, a fluid outlet and a plurality of fluid inlets are provided on the fluid interface end flange; the plurality of fluid inlets are communicated with the second fluid channel, and the fluid outlet is communicated with the third fluid channel through the through hole of the fixed support body.

[0007] Preferably, there is a gap between the inner wall of the heater outer shell and the outer wall of the flow guide cylinder, and a first fluid channel is formed along the gap between the heater outer shell and the flow guide cylinder.

[0008] Preferably, a plurality of radial communication holes are circumferentially formed at one end of the flow guide cylinder close to the heating pipe end flange, and the first fluid channel is connected with the third fluid channel through the plurality of radial communication holes.

[0009] Preferably, bosses are provided on both sides of the fixed support body, wherein the boss on one side of the fixed support body is assembled with the end of the guide cylinder, and the boss on the other side of the fixed support body is pressed against the heating pipe end flange or the fluid interface end flange.

[0010] Preferably, a plurality of grooves are formed on the edge of the fixed support body along the circumferential direction, and the second fluid channel is connected to the first fluid channel through the plurality of grooves.

[0011] Preferably, the fluid outlet is arranged in the central area of ​​the fluid interface end flange, and the fluid outlet is connected to the fluid outlet joint; a plurality of fluid inlets are arranged on both sides of the fluid outlet on the fluid interface end flange, and a plurality of fluid inlets are connected to the fluid inlet joint.

[0012] Preferably, the heat exchanger assembly includes a plurality of heat exchange sleeves which are sequentially sleeved, and the plurality of heat exchange sleeves are sequentially sleeved at the rear end to form a stepped structure, and the outer wall of the heat exchange sleeve is provided with a spiral groove in an annular shape along the long side direction, and a third fluid channel is formed along the spiral groove.

[0013] Furthermore, the heating tube is fixedly connected to the heating tube end flange, and a seal is arranged between the heating tube end flange.

[0014] Preferably, the fluid flow directions of the first fluid channel and the third fluid channel are opposite.

[0015] A fluid heat exchange method of a high-pressure fluid pipeline heater, based on the high-pressure fluid pipeline heater described above, comprises the following steps:

[0016] The unheated fluid flows through the fluid inlet joint along the fluid inlet on the fluid interface end flange through the second fluid channel to the first fluid channel between the guide cylinder and the heater outer shell, and flows along the first fluid channel through the radial connecting hole at one end of the guide cylinder close to the heating tube end flange to the heat exchanger assembly, and flows along the third fluid channel in the heat exchanger assembly. At this time, the fluid in the third fluid channel is heated by the heating tube, and finally the heated fluid flows along the third fluid channel through the through hole of the fixed support body and flows out from the fluid outlet joint of the fluid interface end flange, completing the fluid heat exchange work.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The present invention provides a high-pressure fluid pipeline heater, which effectively controls the fluid path of the fluid to be heated in the heater through the fixed support body and the guide cylinder in the outer shell of the heater, so that the heat exchange structure inside the heater is simple, and the cold high-pressure fluid entering the heater flows from the outside to the inside in the heater for heat exchange. During the heating process, the fluid temperature gradually increases from the periphery to the center, thereby improving the reliability of the heat exchange operation. Finally, the heated fluid flows out from the outlet located at the center of the flange at the interface end. The present invention heats the heat exchanger assembly through the heating pipe, so that the fluid flowing through the heat exchanger assembly can be effectively heated, avoiding the limitation of the heating temperature. The heat exchanger assembly is integrally sleeved on the outer wall of the heating pipe. When the heater fails, it is also convenient to replace the heat exchanger assembly. At the same time, the pipeline heater is sealed and connected through the flange, and the various components of the heater can be conveniently disassembled and assembled, and the maintenance and installation are simple.

[0019] Furthermore, there is a gap between the inner wall of the heater outer shell and the outer wall of the guide cylinder, and a first fluid channel is formed along the gap between the heater outer shell and the guide cylinder. During the flow and heat exchange of the high-pressure fluid inside the pipe-type heater, the heater outer shell is always in contact with the relatively low-temperature fluid, thereby ensuring that the pressure-bearing capacity of the heater shell is not affected by the heating temperature of the fluid, and the fluid can be heated for a long time.

[0020] Furthermore, a plurality of radial connecting holes are circumferentially opened at one end of the guide cylinder close to the heating pipe end flange, and the first fluid channel is connected with the third fluid channel through the plurality of radial connecting holes, so that the fluid can reach the third fluid channel along the first fluid channel, so that the unheated fluid can be effectively heated in the third fluid channel.

[0021] Furthermore, bosses are respectively provided on both sides of the fixed support body, wherein the boss on one side of the fixed support body is assembled with the end of the guide cylinder, thereby improving the assembly stability between the guide cylinder and the fixed support body; the boss on the other side of the fixed support body is pressed onto the heating tube end flange or the fluid interface end flange, and the boss of the fixed support body is pressed onto the fluid interface end flange, which can effectively isolate the second fluid channel and the third fluid channel, thereby preventing the fluid from flowing to the third fluid channel through the second fluid channel and affecting the fluid heat exchange.

[0022] Furthermore, a plurality of grooves are provided along the circumferential direction on the edge of the fixed support body, and the second fluid channel is connected with the first fluid channel through the plurality of grooves, so that the unheated fluid can flow through the grooves via the second fluid channel to the first fluid channel.

[0023] Furthermore, the fluid outlet is arranged in the central area of ​​the fluid interface end flange, and the fluid outlet is connected to the fluid outlet joint; a plurality of fluid inlets are arranged on both sides of the fluid outlet on the fluid interface end flange, and a plurality of fluid inlets are connected to the fluid inlet joint, so as to facilitate the unheated fluid to enter the heater through the fluid inlet joint for heating, and also facilitate the heated fluid in the heater to flow out of the heater through the fluid outlet joint.

[0024] Furthermore, the heat exchanger assembly includes a plurality of heat exchanger sleeves which are sequentially sleeved, and the plurality of heat exchanger sleeves are sequentially sleeved at the rear end to form a stepped structure. The outer wall of the heat exchanger sleeve is provided with a spiral groove in a ring along the long side direction, and a third fluid channel is formed along the spiral groove, so that the contact area between the heating element and the fluid is greatly increased in a smaller volume space, the heating efficiency is improved, and the structure is simple and compact.

[0025] Furthermore, the heating tube is fixedly connected to the heating tube end flange and is sealed with the heating tube end flange, thereby improving the overall sealing of the heater.

[0026] The present invention also provides a fluid heat exchange method for a high-pressure fluid pipeline heater, so that the cold high-pressure fluid entering the heater flows from the outside to the inside of the heater for heat exchange, and the temperature of the fluid gradually increases from the periphery to the center during the heating process. Finally, the heated fluid flows out from the outlet located at the center of the interface end flange. This method can heat the high-pressure fluid to a higher temperature under high pressure, reduces the technical requirements for the heater shell material and heat insulation, and has high safety for long-term operation and is easy to use and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an appearance diagram of a high-pressure fluid pipeline heater provided by the present invention;

[0028] Figure 2 A schematic structural diagram of a high-pressure fluid pipeline heater provided by the present invention;

[0029] Figure 3 A structural cross-section view and a schematic diagram of a fluid flow path of a high-pressure fluid pipeline heater provided by the present invention;

[0030] Figure 4 A heat exchange sleeve structure diagram of a high-pressure fluid pipeline heater provided by the present invention;

[0031] Figure 5 for Figure 4 A-direction cross-sectional view of the middle heat exchange tube sleeve;

[0032] Figure 6 A schematic diagram of the structure of a supporting fixed body of a high-pressure fluid pipeline heater provided by the present invention;

[0033] In the figure: 1-heater outer shell; 2-flow guide cylinder; 3-heat exchange tube sleeve; 4-heating tube; 5-fixed support body; 6-heating tube end flange; 7-fluid interface end flange; 71-fluid inlet connector; 72-fluid outlet connector. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0037] The purpose of the present invention is to provide a high-pressure fluid pipeline heater and a fluid heat exchange method to solve the technical problems of existing pipeline heaters when heating high-pressure fluids, such as limited heating temperature, complex structure, poor working reliability and difficulty in maintenance and replacement.

[0038] Specifically, according to Figure 1 and Figure 2 As shown, the high-pressure fluid pipeline heater comprises a heater outer shell 1, a flow guide cylinder 2, a heat exchanger assembly, a heating tube 4 and two groups of fixed supports 5; the two ends of the heater outer shell 1 are respectively equipped with a heating tube end flange 6 and a fluid interface end flange 7, wherein the heating tube end flange 6 and the fluid interface end flange 7 can withstand the pressure of the internal fluid; and the heating tube end flange 6 and the fluid interface end flange 7 are connected by a high-temperature resistant silicone rubber O-ring for end face sealing. The flow guide cylinder 2 is sleeved in the heater outer shell 1, and a first fluid channel is formed between the flow guide cylinder 2 and the heater outer shell 1, and two groups of fixed supports 5 are respectively fixed at the two ends of the flow guide cylinder 2 in the heater outer shell 1, and through holes are provided on the two groups of fixed supports 5, wherein a second fluid channel is formed between the side wall of the fixed support 5 close to the fluid interface end flange 7 and the side wall of the fluid interface end flange 7; the second fluid channel is connected to the first fluid channel, the heat exchanger assembly is sleeved in the flow guide cylinder 2, and the heating tube 4 passes through the heating tube end flange 6 through the fixed supports The through hole of the support body 5 is penetrated and sleeved in the heat exchanger assembly, wherein the fitting tolerance between the heating tube 4 and the heat exchanger assembly is H8 / f7, which ensures good heat conduction and easy replacement, and there is a gap between the end of the heating tube 4 and the fixed support body 5 near the fluid interface end flange 7 side, and a third fluid channel is formed in the heat exchanger assembly, and the third fluid channel is connected with the first fluid channel, and a fluid outlet and a plurality of fluid inlets are provided on the fluid interface end flange 7; the plurality of fluid inlets are connected with the second fluid channel, and the fluid outlet is connected with the third fluid channel through the through hole of the fixed support body 5.

[0039] In the present invention, the fixed support body 5 is placed between the flow guide cylinder 2 and the heating pipe end flange 6 and the fluid interface end flange 7 to play the role of supporting, fixing and guiding.

[0040] Specifically, there is a gap between the inner wall of the heater outer shell 1 and the outer wall of the flow guide cylinder 2, and a first fluid channel is formed along the gap between the heater outer shell 1 and the flow guide cylinder 2, wherein the gap is about 1-3 mm.

[0041] Specifically, a plurality of radial communication holes are circumferentially formed at one end of the flow guide cylinder 2 close to the heating pipe end flange 6, and the first fluid channel is connected with the third fluid channel through the plurality of radial communication holes.

[0042] Specifically, according to Figure 6 As shown, bosses are provided on both sides of the fixed support body 5, wherein the boss on one side of the fixed support body 5 is assembled with the end of the guide cylinder 2, and the boss on the other side of the fixed support body 5 is pressed against the heating pipe end flange 6 or the fluid interface end flange 7.

[0043] Specifically, a plurality of grooves are formed on the edge of the fixed support body 5 along the circumferential direction, and the second fluid channel is connected with the first fluid channel through the plurality of grooves.

[0044] Specifically, the fluid outlet is arranged in the central area of ​​the fluid interface end flange 7, and the fluid outlet is connected to the fluid outlet joint 72; a plurality of fluid inlets are arranged on both sides of the fluid outlet on the fluid interface end flange 7, and a plurality of fluid inlets are connected to the fluid inlet joint 71.

[0045] Specifically, the heat exchanger assembly includes a plurality of heat exchanger sleeves 3 which are sequentially sleeved, and the plurality of heat exchanger sleeves 3 are sequentially sleeved at the rear end to form a stepped structure, and the outer wall of the heat exchanger sleeve 3 is provided with a spiral groove in an annular manner along the long side direction, such as Figure 4 and Figure 5 As shown, a third fluid channel is formed along the spiral groove, wherein the heat pipe matching tolerance is H8 / f7.

[0046] In the present invention, the heat exchange tube sleeve 3 is made of a copper alloy tube with high thermal conductivity and large heat capacity, and a spiral groove is processed on the outer wall. By selecting appropriate parameters such as the number of spiral grooves, groove depth, groove width and pitch, a better heat exchange efficiency is achieved. The heat exchange tube sleeve 3 is made of materials with high thermal conductivity and large heat capacity such as red copper, copper alloy, silicon carbide, and alumina ceramics, and the outer wall of the heat exchange tube is provided with a spiral groove to increase the heat exchange contact area and improve the heat exchange efficiency. The heating tube 4 can adopt a resistive electric heating or a combustion heating method.

[0047] Specifically, the heating tube 4 is fixedly connected to the heating tube end flange 6 and is sealed between the heating tube end flange 6 .

[0048] Specifically, the fluid flow directions of the first fluid channel and the third fluid channel are opposite.

[0049] The present invention also provides a fluid heat exchange method for a high-pressure fluid pipeline heater, such as Figure 3 As shown, a high-pressure fluid pipeline heater based on the above-mentioned method includes the following steps:

[0050] The unheated fluid flows through the fluid inlet joint 71 along the fluid inlet on the fluid interface end flange 7 through the second fluid channel to the first fluid channel between the guide cylinder 2 and the heater outer shell 1, and flows along the first fluid channel through the radial connecting hole at one end of the guide cylinder 2 close to the heating tube end flange 6 to the heat exchanger assembly, and flows along the third fluid channel in the heat exchanger assembly. At this time, the fluid in the third fluid channel is heated by the heating tube 4, and finally the heated fluid flows along the third fluid channel through the through hole of the fixed support body 5 and flows out from the fluid outlet joint 72 of the fluid interface end flange 7, completing the fluid heat exchange work.

[0051] In summary, the present invention provides a high-pressure fluid pipeline heater and a fluid heat exchange method, which effectively controls the flow path of the fluid to be heated inside the heater through the fixed support body and the guide cylinder and other components inside the heater, so that the cold high-pressure fluid entering the heater flows from the outside to the inside in the heater for heat exchange, and the temperature of the fluid gradually increases from the periphery to the center during the heating process, and finally, the heated fluid flows out from the outlet located at the center of the interface end flange. The outstanding advantage of the high-pressure fluid pipeline heater provided by the present invention is that it can heat the high-pressure fluid to a higher temperature under high pressure, reducing the technical requirements for the heater shell material and heat insulation, and has high safety for long-term operation and is easy to use and maintain.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A high-pressure fluid pipeline heater, characterized in that: The invention comprises a heater outer shell (1), a flow guide cylinder (2), a heat exchanger assembly, a heating tube (4) and two groups of fixed supports (5); the two ends of the heater outer shell (1) are respectively equipped with a heating tube end flange (6) and a fluid interface end flange (7); the flow guide cylinder (2) is sleeved in the heater outer shell (1), and a first fluid channel is formed between the flow guide cylinder (2) and the heater outer shell (1); the two groups of fixed supports (5) are respectively fixed at the two ends of the flow guide cylinder (2) in the heater outer shell (1), and the two groups of fixed supports (5) are both provided with through holes, wherein a side wall of the fixed support (5) close to the fluid interface end flange (7) and a side wall of the fluid interface end flange (7) are formed between the side wall a second fluid channel; the second fluid channel is connected to the first fluid channel, the heat exchanger assembly is sleeved in the flow guide cylinder (2), the heating tube (4) is sleeved in the heat exchanger assembly through the heating tube end flange (6) and the through hole of the fixed support body (5), and a gap exists between the end of the heating tube (4) and the fixed support body (5) near the fluid interface end flange (7), a third fluid channel is formed in the heat exchanger assembly, the third fluid channel is connected to the first fluid channel, the fluid interface end flange (7) is provided with a fluid outlet and a plurality of fluid inlets; the plurality of fluid inlets are connected to the second fluid channel, and the fluid outlet is connected to the third fluid channel through the through hole of the fixed support body (5); There is a gap between the inner wall of the heater outer shell (1) and the outer wall of the flow guide cylinder (2), and a first fluid channel is formed along the gap between the heater outer shell (1) and the flow guide cylinder (2).

2. A high pressure fluid pipeline heater according to claim 1, characterized in that: A plurality of radial communication holes are circumferentially formed at one end of the flow guide cylinder (2) close to the heating pipe end flange (6), and the first fluid channel is connected to the third fluid channel through the plurality of radial communication holes.

3. A high pressure fluid pipeline heater according to claim 1, characterized in that: Bosses are respectively provided on both sides of the fixed support body (5), wherein the boss on one side of the fixed support body (5) is assembled with the end of the flow guide cylinder (2), and the boss on the other side of the fixed support body (5) is pressed against the heating pipe end flange (6) or the fluid interface end flange (7).

4. A high pressure fluid pipeline heater according to claim 1, characterized in that: The edge of the fixed support body (5) is provided with a plurality of grooves along the circumferential direction, and the second fluid channel is connected with the first fluid channel through the plurality of grooves.

5. A high pressure fluid pipeline heater according to claim 1, characterized in that: The fluid outlet is arranged in the central area of ​​the fluid interface end flange (7), and the fluid outlet is connected to the fluid outlet joint (72); a plurality of fluid inlets are arranged on both sides of the fluid outlet on the fluid interface end flange (7), and the plurality of fluid inlets are connected to the fluid inlet joint (71).

6. A high pressure fluid pipeline heater according to claim 1, characterized in that: The heat exchanger assembly comprises a plurality of heat exchange tube sleeves (3) which are sleeved in sequence, wherein the plurality of heat exchange tube sleeves (3) are sleeved in sequence at the rear end to form a stepped structure, wherein the outer wall of the heat exchange tube sleeve (3) is provided with a spiral groove in an annular manner along the long side direction, and a third fluid channel is formed along the spiral groove.

7. A high pressure fluid pipeline heater according to claim 6, characterized in that: The heating tube (4) is fixedly connected to the heating tube end flange (6), and is sealed between the heating tube end flange (6).

8. The high-pressure fluid pipeline heater according to claim 1, characterized in that: The fluid flow directions of the first fluid channel and the third fluid channel are opposite.

9. A fluid heat exchange method for a high-pressure fluid pipeline heater, based on a high-pressure fluid pipeline heater according to any one of claims 1 to 8, characterized in that: The steps include: The unheated fluid flows through the fluid inlet joint (71) along the fluid inlet on the fluid interface end flange (7) through the second fluid channel to the first fluid channel between the flow guide cylinder (2) and the heater outer shell (1), and flows along the first fluid channel through the radial connecting hole at one end of the flow guide cylinder (2) close to the heating tube end flange (6) to the heat exchanger assembly, and flows along the third fluid channel in the heat exchanger assembly. At this time, the fluid in the third fluid channel is heated by the heating tube (4). Finally, the heated fluid flows along the third fluid channel through the through hole of the fixed support body (5) and flows out from the fluid outlet joint (72) of the fluid interface end flange (7), thereby completing the fluid heat exchange work.

Images