Heater and ammonia synthesis system
By designing the heating inner part of the electromagnetic induction coil winding in the heater and using its multiple pores for heat exchange, the problem of low heating efficiency in the existing heating mode is solved, efficient and uniform gas heating is achieved, and rapid heating of the synthetic ammonia reactor is supported.
Patent Information
- Application Number
- CN202323510434.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2033-12-21
AI Technical Summary
In the existing heating methods, the heat exchange contact area between the gas and the furnace tube or resistive wire is small, resulting in a lower heating efficiency.
A heater is designed, including a housing and a heating inner member, which is surrounded by an electromagnetic induction coil and has a plurality of pores through which gases are heat exchanged.
Through electromagnetic induction heating and increasing the heat exchange area between the gas and the heating inner part, efficient heating is achieved, the gas is heated quickly and the heating is uniform, which improves the rapid heating effect of the synthesis ammonia reactor in the start-up stage.
Smart Images
Figure CN222593492U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ammonia synthesis, in particular to a heater and an ammonia synthesis system. Background Art
[0002] The start-up heating furnace of the synthetic ammonia reactor is an important equipment in the ammonia synthesis system. It is mainly used to provide heat for the synthetic ammonia reactor during the startup phase of the synthetic ammonia reactor.
[0003] There are two main types of existing heating methods, which are fossil fuel combustion heating and electric heating. When fossil fuel combustion heating is used, a start-up heating furnace is set outside the synthetic ammonia reactor, and the fossil fuel is burned in the start-up heating furnace to generate high-temperature heating furnace tubes. The gas takes away the heat through the furnace tubes, and then the gas is input into the synthetic ammonia reactor, thereby providing heat for the synthetic ammonia reactor, and the gas generated after the fossil fuel is burned is directly discharged into the atmosphere as exhaust gas; when electric heating is used, an electric heater is set inside or outside the synthetic ammonia reactor, and Joule heat is generated by a resistance wire, so that the gas takes away the heat through the resistance wire, and then the gas is input into the synthetic ammonia reactor, thereby providing heat for the synthetic ammonia reactor.
[0004] In the above heating method, since the heat exchange contact area between the gas and the heating medium such as the furnace tube or the resistance wire is small, the gas temperature rises slowly and its heating efficiency is low. Utility Model Content
[0005] The embodiments of the utility model provide a heater and an ammonia synthesis system to solve the problem of low heating efficiency in the prior art.
[0006] An embodiment of the utility model provides a heater, comprising: a shell, on which an air inlet and an air outlet are provided; a heating inner component, which is arranged in the shell, the heating inner component is located between the air inlet and the air outlet, the heating inner component is wound with an electromagnetic induction coil, and the heating inner component has a plurality of pores for the gas to be heated to pass through.
[0007] Optionally, the heating internal component is divided into multiple sections, and the multiple sections of the heating internal component are arranged at intervals along the direction from the air inlet to the air outlet, and each section of the heating internal component is independently wound with the electromagnetic induction coil.
[0008] Optionally, the heating inner part comprises a wire mesh and / or a filler.
[0009] Optionally, the heating internal component includes a plurality of heating tubes, the length direction of the heating tubes is parallel to the direction from the air inlet to the air outlet, the heating tubes are connected to the shell, and a wire mesh and / or filler is arranged inside the heating tubes.
[0010] Optionally, a gas distributor is further included, wherein the gas distributor is provided with through holes for gas to pass through, the gas distributor is arranged in the shell, the gas distributor is arranged at one end of the heating internal component close to the air inlet, and the gas distributor is connected to the shell.
[0011] Optionally, the air inlet and the air outlet are respectively provided at opposite ends of the shell; and the shell also includes a guide cylinder, which is arranged in the shell, and openings are provided at opposite ends of the guide cylinder, one of the openings faces the air inlet, and the other opening faces the air outlet, the heating internal component is arranged in the guide cylinder, the electromagnetic induction coil is wound around the outer side surface of the guide cylinder, and the guide cylinder is connected to the shell.
[0012] Optionally, a support member is further included, which is arranged in the shell, the support member is located at one end of the heating inner member close to the air inlet, and the support member is respectively connected to the inner wall of the shell and the guide cylinder.
[0013] Optionally, the outer edge of the support member is connected to the inner wall of the shell, the inner edge of the support member is connected to the outer wall of the guide cylinder, and the support member blocks the gap between the shell and the guide cylinder.
[0014] Optionally, it also includes a supporting member, which is provided with a plurality of through holes for gas to pass through, and the supporting member is arranged in the shell. The supporting member is located at one end of the heating internal member close to the air inlet, and the supporting member is connected to the shell, and the supporting member is used to support the heating internal member.
[0015] Optionally, a pressing piece is further included, wherein the pressing piece is provided with a plurality of through holes for gas to pass through, the pressing piece is located in the shell, the pressing piece is arranged at one end of the heating inner part close to the air outlet, and the pressing piece is connected to the shell.
[0016] An embodiment of the utility model further provides an ammonia synthesis system, comprising the heater described in any one of the above items.
[0017] In the embodiment of the present application, under the action of the electromagnetic induction coil, the heating inner part generates eddy current and generates heat. When the gas moves from the air inlet to the air outlet, it passes through a plurality of pores on the heating inner part. The gas exchanges heat with the heating inner part in the pores, thereby achieving the purpose of heating the gas. Finally, the gas is input into the synthetic ammonia reactor to heat the catalyst bed. Compared with the prior art, the present application has at least the following advantages:
[0018] 1. Electromagnetic induction heating is adopted, the heating internal parts have a fast heating rate and high heating efficiency, thus reducing energy waste;
[0019] 2. The heating internals have multiple pores through which the heated gas passes, which increases the heat exchange area between the gas and the heating internals. The gas heats up quickly and evenly, thereby improving the heating efficiency and achieving the effect of rapid heating of the synthetic ammonia reactor during the startup phase;
[0020] 3. Compared with traditional fossil fuel heating methods, electromagnetic induction heating does not emit greenhouse gases, thus protecting the environment.
[0021] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below.
[0023] Figure 1 A schematic diagram of the structure of a heater provided in an embodiment of the utility model;
[0024] Figure 2 A schematic diagram of the structure of another heater provided in an embodiment of the utility model;
[0025] Figure 3 A schematic diagram of the structure of another heater provided in an embodiment of the utility model;
[0026] Figure 4 The embodiment of the utility model provides Figure 1 Section view along AA;
[0027] Figure 5 A schematic diagram of the structure of another heater provided in an embodiment of the utility model;
[0028] Figure 6 A schematic diagram of an ammonia synthesis system provided in an embodiment of the utility model.
[0029] 1-shell, 11-air inlet, 12-air outlet, 2-heating internal parts, 21-wire mesh, 22-heating tube, 3-electromagnetic induction coil, 4-gas distributor, 5-guide cylinder, 6-support, 7-bearing member, 8-pressing member, 41-synthetic ammonia reactor, 42-heater, 43-high-pressure separator, 44-low-pressure separator, 45-power supply, 46-heat exchanger, 47-water cooler, 48-cold exchanger. DETAILED DESCRIPTION
[0030] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can also be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0031] Reference Figure 1 The embodiment of the utility model provides a heater for providing heat to a synthetic ammonia reactor during the startup phase of the synthetic ammonia reactor, comprising: a shell 1, wherein the shell 1 is provided with an air inlet 11 and an air outlet 12; a heating inner component 2, wherein the heating inner component 2 is arranged in the shell 1, wherein the heating inner component 2 is located between the air inlet 11 and the air outlet 12, wherein an electromagnetic induction coil 3 is wound around the heating inner component 2, and wherein the heating inner component 2 has a plurality of pores for the heated gas to pass through.
[0032] Specifically, the shell 1 is along Figure 1 As shown in the vertical arrangement, the air inlet 11 is located at the bottom end of the shell 1, and the air outlet 12 is arranged opposite to the air inlet 11 and located at the top end of the shell 1; the shape of the shell 1 can be a cylinder or a rectangular parallelepiped, and its specific shape can be flexibly selected according to design requirements, and the embodiments of the present application do not limit it.
[0033] In this embodiment, the heating internal part 2 is arranged in the middle of the shell 1 along the height direction of the shell 1, the electromagnetic induction coil 3 is evenly wound on the side of the heating internal part 2, and the two ends of the electromagnetic induction coil 3 are respectively extended to the outside of the shell 1 and connected to the power supply; the heating internal part 2 can be directly fixed on the inner wall of the shell 1, and can also be indirectly fixed to the inner wall of the shell 1 through other components.
[0034] In addition, the heating inner part 2 is made of a conductive material, so that under the action of the electromagnetic induction coil 3, eddy currents are generated on the heating inner part 2 and heat is generated, thereby heating the gas passing through its own pores. The material of the heating inner part 2 may specifically include but is not limited to: iron, cobalt, nickel and their alloys, graphite and other materials.
[0035] In this embodiment, when the synthetic ammonia reactor needs to start heating the catalyst bed, the heater is turned on. At this time, under the action of the electromagnetic induction coil 3, the heating inner part 2 generates eddy currents and generates heat, and then the gas to be heated is input through the air inlet 11. When the heated gas passes through the pores on the heating inner part 2, it exchanges heat with the heating inner part 2, so that the gas is quickly heated. Then, the gas reaching the required temperature is discharged through the air outlet 12 and transported to the synthetic ammonia reactor, so that the heat in the gas is brought into the synthetic ammonia reactor to heat the catalyst bed of the synthetic ammonia reactor. During the heating process, the temperature of the gas at a certain flow rate can be controlled by controlling the electric energy input to the electromagnetic induction coil 3. At the same time, by timely controlling the amount of electric energy input, the temperature of the heating inner part 2 can be prevented from exceeding its own melting point, so as to avoid damage to the heating inner part 2.
[0036] This embodiment heats the gas by electromagnetic induction heating, and passes the heated gas into the synthetic ammonia reactor, thereby heating the catalyst bed of the synthetic ammonia reactor. Compared with the prior art, when electromagnetic induction heating is adopted, the heating inner part 2 has a fast heating rate, and the heating inner part 2 has a plurality of pores through which the heated gas passes, thereby increasing the heat exchange contact area between the gas and the heating inner part 2, thereby improving the heating efficiency, and there is no greenhouse gas emission, thereby achieving the effect of rapid heating of the synthetic ammonia reactor during the startup phase.
[0037] Optionally, refer to Figure 2 The heating inner component 2 is composed of multiple sections, and the multiple sections of the heating inner component 2 are arranged at intervals along the direction from the air inlet 11 to the air outlet 12, and each section of the heating inner component 2 is independently wound with the electromagnetic induction coil 3.
[0038] Specifically, the heating inner part 2 is divided into several sections, and the electromagnetic induction coil 3 is independently wound around the circumference of each section of the heating inner part 2, and each electromagnetic induction coil 3 is respectively connected to an external power supply, so that each electromagnetic induction coil 3 constitutes a mutually independent current loop, thereby forming a plurality of independently controllable heating parts in the shell 1, and the supply and regulation of heating energy are realized by controlling the current on and off and the current size on each loop, so as to accurately control the heating power of each heating part. The specific number of sections of the heating inner part 2 can be two or three, and those skilled in the art can flexibly adjust it according to the heating demand, and the embodiments of the present application do not limit it.
[0039] Figure 2 The technical solution of dividing the heating internal component 2 into three sections is specifically demonstrated. Along the direction from the air inlet 11 to the air outlet 12, the three sections of the heating internal component 2 are arranged in the shell 1 at equal intervals. The electromagnetic induction coil 3 is independently wound around the circumference of each section of the heating internal component 2, and both ends of each electromagnetic induction coil 3 extend out of the shell 1 and are connected to an external power supply.
[0040] Optionally, refer to Figure 1 and Figure 2 , the heating inner part 2 includes a wire mesh 21 and / or a filler.
[0041] Specifically, the heating internal component 2 can be a wire mesh 21, various fillers, or a mixture of the wire mesh 21 and fillers. By adopting this type of heating internal component 2 with a high specific surface area, the heat exchange contact area between the gas and the heating internal component 2 can be increased, thereby improving the heating efficiency.
[0042] It should be noted that the wire mesh 21 and the filler are both made of conductive materials; the wire mesh 21 can be specifically made of metal, and its specific shape is not limited, and can be round or square, and is stacked to form a specific densely porous heating internal part 2; the filler specifically includes random filler and regular filler, and the filler has multiple holes for gas to pass through, and there are gaps between the fillers for gas to pass through, thereby further increasing the heat exchange contact area between the gas and the heating internal part 2, and the filler specifically includes but is not limited to: ball ring filler, step ring filler, arc saddle filler, metal ring rectangular saddle filler, spherical filler, grid filler and corrugated filler, etc.
[0043] Optionally, refer to Figure 3 The heating internal part 2 includes a plurality of heating tubes 22, the length direction of the heating tubes 22 is parallel to the direction from the air inlet 11 to the air outlet 12, the heating tubes 22 are connected to the shell 1, and a wire mesh 21 and / or filler is arranged inside the heating tubes 22.
[0044] Specifically, the heating internal part 2 is composed of a plurality of heating tubes 22, which are evenly arranged in the shell 1. The heating tubes 22 are thin metal tubes, and the length direction of the heating tubes 22 is parallel to the height direction of the shell 1. A fixing part is arranged in the shell 1, and the fixing part is used to fix the heating tube 22. When the shell 1 is a cylinder, the fixing part is disc-shaped, and the fixing part and the shell 1 are coaxially arranged. A plurality of through holes for the heating tube 22 to pass through are arranged on the surface of the fixing part. The fixing part is arranged at one end of the heating tube 22 close to the air inlet 11, and can also be arranged at The fixing piece is welded to the shell 1 at any position along the axial direction of the heating tube 22, one end of the heating tube 22 is inserted into the through hole on the fixing piece, and the heating tube 22 is welded to the fixing piece, so as to fix the heating tube, so that the gas entering through the air inlet 11 passes through the internal cavity of the heating tube 22, thereby forming a guide channel inside the heating tube 22 to prevent the gas from diffusing to the surroundings, so as to improve the heat exchange efficiency; in addition, in order to improve the fixing effect of the heating tube 22, the fixing piece can also be arranged at one end of the heating tube 22 close to the air outlet 12.
[0045] In this embodiment, when heating the gas, the gas directly passes through the inner cavity of the heating tube 22 to take away the heat. In addition, the heating tube 22 may be filled with a wire mesh 21 or a filler, or a mixture of the wire mesh 21 and the filler, so as to further increase the heat exchange contact area between the gas and the heating inner part 2, thereby improving the heating efficiency.
[0046] Optionally, refer to Figure 1 and Figure 2 , and also includes a gas distributor 4, which is provided with a plurality of through holes for gas to pass through, and the gas distributor 4 is arranged in the shell 1, and the gas distributor 4 is arranged at one end of the heating internal part 2 close to the air inlet 11, and the gas distributor 4 is connected to the shell 1.
[0047] Specifically, the shape of the gas distributor 4 can be circular or rectangular, as long as it can be installed in the shell 1, and the embodiment of the present application does not limit it; in the present embodiment, the shape of the shell 1 is cylindrical, the shape of the gas distributor 4 is circular, the gas distributor 4 is coaxially arranged with the shell 1, and a plurality of through holes are evenly arranged on the surface of the gas distributor 4, and the through holes are used for gas to pass through; the gas distributor 4 is located at one end of the heating internal part 2 close to the air inlet 11, and the gas distributor 4 can be directly fixed to the inner wall of the shell 1 by welding, or it can be directly fixed to the inner wall of the shell 1 by bolts. When the strength of the gas distributor 4 is sufficient, the heating internal part 2 can be directly placed on the gas distributor 4, so that the gas distributor 4 is used to support the heating internal part 2; the through hole on the gas distributor 4 is opposite to the air inlet 11, and the gas input from the air inlet 11 passes through the gas distributor 4, and then passes through the pores on the heating internal part 2 for heat exchange.
[0048] It should be noted that, when the heating internal component 2 in the shell 1 is multi-stage, a gas distributor 4 is provided at one end of each heating internal component 2 close to the air inlet 11, and each heating internal component 2 is supported by the gas distributor 4.
[0049] In this embodiment, a gas distributor 4 is provided to evenly distribute the introduced gas on a cross section parallel to the gas distributor 4 , so that the gas can evenly contact the heating internal component 2 and perform heat exchange, thereby improving the heating efficiency.
[0050] Optionally, refer to Figure 1 and Figure 2The shell 1 is provided with the air inlet 11 and the air outlet 12 at opposite ends thereof, respectively; the shell 1 also includes a guide cylinder 5, which is arranged in the shell 1, and openings are arranged at opposite ends of the guide cylinder 5, one of the openings faces the air inlet 11, and the other opening faces the air outlet 12, the heating inner part 2 is arranged in the guide cylinder 5, the electromagnetic induction coil 3 is wound around the outer side surface of the guide cylinder 5, and the guide cylinder 5 is connected to the shell 1.
[0051] Specifically, openings are set at both ends of the guide cylinder 5, so that a guide channel from the air inlet 11 to the air outlet 12 is formed inside the guide cylinder 5; the shape of the guide cylinder 5 can be a cylinder or a rectangular cylinder, and its shape only needs to meet the installation requirements and form the required guide channel, and the embodiment of the present application does not limit it; in this embodiment, the shape of the guide cylinder 5 is a cylinder, the guide cylinder 5 and the shell 1 are coaxially arranged, the heating internal component 2 is arranged in the guide cylinder 5, and the side wall of the guide cylinder 5 can play a role in limiting the position of the heating internal component 2. When the heating internal component 2 is various fillers, the guide cylinder 5 and the gas distributor 4 form a accommodating chamber for placing the fillers.
[0052] It should be noted that, when the heating internal component 2 in the shell 1 is multi-section, the multiple sections of the heating internal component 2 are all arranged in the guide tube 5, and a gas distributor 4 is provided at the end of each section of the heating internal component 2 close to the air inlet 11. The gas distributor 4 close to the air inlet 11 can be directly connected to the inner wall of the shell 1, and can also be connected to the guide tube 5, and the gas distributors 4 located in the guide tube are all connected to the guide tube 5.
[0053] In this embodiment, the guide channel formed by the guide cylinder 5 guides the gas through the air inlet 11 to the air outlet 12, thereby preventing the gas from diffusing to the surroundings, so that the gas entering the shell 1 can efficiently exchange heat with the heating internal component 2 in the guide cylinder 5, thereby accelerating the gas temperature rise and further improving the heating efficiency.
[0054] Optionally, refer to Figure 1 and Figure 2 , and also includes a support member 6, which is arranged in the shell 1, and the support member 6 is located at one end of the heating inner member 2 close to the air inlet 11, and the support member 6 is connected to the inner wall of the shell 1 and the guide cylinder 5 respectively.
[0055] Specifically, the support member 6 is arranged at one end of the guide cylinder 5 close to the air inlet 11, the support member 6 is arranged around the guide cylinder 5, and the support member 6 and the opening of the guide cylinder 5 are staggered to avoid the support member 6 blocking the opening of the guide cylinder 5; when the shell 1 and the guide cylinder 5 are both cylindrical in shape, the support member 6 is annular, and the outer edge of the support member 6 is welded to the inner wall of the shell 1; when installing the guide cylinder 5, the guide cylinder 5 can be directly placed on the support member 6, or the guide cylinder 5 can be directly welded to the support member 6 to avoid shaking of the guide cylinder 5 and affecting the heat exchange efficiency.
[0056] It should be noted that if Figure 3 As shown, when the heating inner part 2 is a heating tube 22, the inner edge of the support member 6 is connected to the fixing member near the air inlet 11, specifically by welding, so that the shell 1 and the fixing member are connected as a whole with the help of the support member 6.
[0057] Optionally, refer to Figure 1 and Figure 4 The outer edge of the support member 6 is connected to the inner wall of the shell 1 , and the inner edge of the support member 6 is connected to the guide cylinder 5 . The support member 6 blocks the gap between the shell 1 and the guide cylinder 5 .
[0058] Specifically, the support member 6 is in the shape of a ring, the inner edge of the support member 6 is welded to the guide cylinder 5, and the outer edge of the support member 6 is welded to the inner wall of the shell 1; due to the presence of a gap between the inner wall of the shell 1 and the guide cylinder 5, when the gas enters the shell 1, part of the gas will diffuse into the gap and cannot contact and exchange heat with the heating internal part 2, thereby affecting the overall heat exchange efficiency; in this embodiment, the gap between the inner wall of the shell 1 and the guide cylinder 5 is sealed by the support member 6, which can prevent the gas from diffusing into the gap, so that all the gas enters the guide cylinder 5 and exchanges heat with the heating internal part 2, thereby improving the heating efficiency.
[0059] Optionally, refer to Figure 5 , and also includes a supporting member 7, which is provided with a plurality of through holes for gas to pass through, and the supporting member 7 is arranged in the shell 1. The supporting member 7 is located at one end of the heating inner member 2 close to the air inlet 11, and the supporting member 7 is connected to the shell 1, and the supporting member 7 is used to support the heating inner member 2.
[0060] Specifically, a supporting member 7 is disposed at one end of the heating inner member 2 close to the air inlet 11 , so that the heating inner member 2 is supported by the supporting member 7 .
[0061] It should be noted that when a gas distributor 4 is provided at one end of the heating internal component 2 close to the air inlet 11, if the strength of the gas distributor 4 is not sufficient to support the heating internal component 2, a supporting component 7 may be provided between the heating internal component 2 and the gas distributor 4, and the supporting component 7 is connected to the guide tube 5, so that the heating internal component 2 can be supported by the supporting component 7 to avoid damage to the gas distributor 4 due to excessive weight of the heating internal component 2; if the strength of the gas distributor 4 is sufficient to support the heating internal component 2, the supporting component 7 may no longer be used, and the heating internal component 2 can be directly supported by the gas distributor 4.
[0062] In addition, when the heating inner part 2 is a wire mesh 21 or a filler, the supporting member 7 is arranged at one end of the heating inner part 2 close to the air inlet 11, and the supporting member 7 is used to support the filler and the wire mesh at the bottom. When the heating inner part 2 is a heating tube 22, a fixing member is used to fix the heating tube 22 in the shell 1. The fixing member is different from the supporting member 7. The fixing member can be arranged at one end of the heating inner part 2 close to the air inlet 11, and can also be arranged at the middle section of the heating tube 22 or at any position along the axial direction of the heating tube 22.
[0063] Optionally, refer to Figure 1 and Figure 2 , and also includes a clamping piece 8, which is provided with a plurality of through holes for gas to pass through, and the clamping piece 8 is located in the shell 1. The clamping piece 8 is arranged at one end of the heating inner part 2 close to the air outlet 12, and the clamping piece 8 is connected to the shell 1.
[0064] Specifically, when the heating inner part 2 is a wire mesh 21 or a filler, the heating inner part 2 is filled into the guide tube 5. When the gas enters the shell 1, the heating inner part 2 will be blown upward, causing the heating inner part 2 to shake and affecting the heat exchange effect. In this embodiment, a clamping member 8 is provided at one end of the heating inner part 2 close to the gas outlet 12, and the clamping member 8 can limit the movement of the heating inner part 2 toward the gas outlet 12, thereby preventing the heating inner part 2 from moving. In the case where both the shell 1 and the guide tube 5 are cylinders, the clamping member 8 is disc-shaped, and a mounting ring is provided at one end of the heating inner part 2 close to the gas outlet 12. The mounting ring is coaxially welded to the inner wall of the shell 1, and the edge of the clamping member 8 is welded to the mounting ring, thereby fixing the clamping member 8.
[0065] It should be noted that when the heating inner part 2 is multi-section, a clamping piece 8 is provided at one end of each heating inner part 2 close to the air outlet 12 . The clamping piece 8 is coaxially arranged in the guide tube 5 , and the edge of the clamping piece 8 is welded to the inner wall of the guide tube 5 .
[0066] Reference Figure 6 The present utility model also provides an ammonia synthesis system, comprising the heater described in any of the above embodiments.
[0067] Specifically, the ammonia synthesis system includes an ammonia synthesis reactor 41, a heater 42, a high-pressure separator 43, a low-pressure separator 44, a power supply 45, a heat exchanger 46, a water cooler 47 and a cold exchanger 48; the heater 42 is arranged outside the ammonia synthesis reactor 41, so that the gas outlet 12 of the heater 42 is connected to the ammonia synthesis reactor 41, and the heater 42 is connected to the power supply 45. During the start-up and temperature-raising stage of the synthetic ammonia reactor 41, the synthesis gas needs to be compressed and input into the synthetic ammonia reactor 41, and the heater 42 is started to heat the gas so that the temperature of the gas entering the synthetic ammonia reactor 41 reaches the set value, thereby heating the catalyst bed in the synthetic ammonia reactor 41, so that the catalyst temperature in the synthetic ammonia reactor 41 gradually rises and reaches the activation temperature. At the same time, the temperature and pressure in the synthetic ammonia reactor 41 are gradually increased, so that the ammonia synthesis reaction begins, and as the activation process proceeds, the reaction volume becomes larger and larger, and the released reaction heat can also increase the catalyst bed temperature. Finally, the ammonia synthesis reaction process is transformed from the start-up state to the normal operation state through system heat recovery, etc. The heater 42 gradually reduces the power, and finally exits the entire process flow and shuts down. After the synthetic ammonia reactor 41 operates normally, the synthesis gas generated by the synthetic ammonia reactor 41 passes through the heat exchanger 46, the water cooler 47 and the cold exchanger 48 in sequence, so as to reduce the temperature of the synthesis gas and condense the generated liquid ammonia product. The synthesis gas containing liquid ammonia is then passed into the high-pressure separator 43 and the low-pressure separator 44 in sequence to separate the gas and liquid. The gas returns to the ammonia synthesis system loop, and the liquid finally generates a liquid ammonia product and is sent to the liquid ammonia storage facility.
[0068] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0069] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.
[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims
1. A heater, characterized in that: include: A housing, wherein the housing is provided with an air inlet and an air outlet; The heating inner component is arranged in the shell, the heating inner component is located between the air inlet and the air outlet, an electromagnetic induction coil is wound around the heating inner component, and the heating inner component has a plurality of pores for the heated gas to pass through.
2. The heater according to claim 1, characterized in that The heating internal component is composed of multiple sections, and the multiple sections of the heating internal component are arranged at intervals along the direction from the air inlet to the air outlet, and each section of the heating internal component is independently wound with the electromagnetic induction coil.
3. The heater according to claim 1 or 2, characterized in that: The heating internals include wire mesh and / or fillers.
4. The heater according to claim 1 or 2, characterized in that: The heating internal component includes a plurality of heating tubes, the length direction of the heating tubes is parallel to the direction from the air inlet to the air outlet, the heating tubes are connected to the shell, and a wire mesh and / or filler is arranged inside the heating tubes.
5. The heater according to claim 1 or 2, characterized in that: It also includes a gas distributor, which is provided with through holes for gas to pass through, and is arranged in the shell. The gas distributor is arranged at one end of the heating internal component close to the air inlet, and the gas distributor is connected to the shell.
6. The heater according to claim 1 or 2, characterized in that: The air inlet and the air outlet are respectively provided at opposite ends of the shell; It also includes a guide cylinder, which is arranged in the shell, and openings are arranged at opposite ends of the guide cylinder, one of the openings faces the air inlet, and the other opening faces the air outlet. The heating internal part is arranged in the guide cylinder, the electromagnetic induction coil is wound around the outer side surface of the guide cylinder, and the guide cylinder is connected to the shell.
7. The heater according to claim 6, characterized in that It also includes a support member, which is arranged in the shell, located at one end of the heating inner member close to the air inlet, and is respectively connected to the inner wall of the shell and the guide cylinder.
8. The heater according to claim 7, characterized in that The outer edge of the support member is connected to the inner wall of the shell, the inner edge of the support member is connected to the guide cylinder, and the support member blocks the gap between the shell and the guide cylinder.
9. The heater according to claim 1 or 2, characterized in that: It also includes a supporting member, which is provided with a plurality of through holes for gas to pass through. The supporting member is arranged in the shell, the supporting member is located at one end of the heating internal member close to the air inlet, the supporting member is connected to the shell, and the supporting member is used to support the heating internal member.
10. The heater according to claim 1 or 2, characterized in that: It also includes a pressing piece, which is provided with a plurality of through holes for gas to pass through, and is located in the shell. The pressing piece is arranged at one end of the heating inner part close to the air outlet, and the pressing piece is connected to the shell.
11. An ammonia synthesis system, characterized in that: The heater comprises the heater according to any one of claims 1 to 10.