Propane dehydrogenation reaction feeding heating furnace energy-saving device

Abstract

The invention belongs to the technical field of chemical equipment energy saving, and particularly relates to a propane dehydrogenation reaction feeding heating furnace energy-saving device which comprises a supporting frame, a supporting plate, a heat exchange tank, a dehydrogenation reaction heating furnace, a smoke exhaust pipe, a first air inlet pipe, a first filtering assembly, a second filtering assembly, a driving assembly, a transmission assembly, a heat transfer pipe and a heat exchange pipe. The device is reasonable in design, the propane gas entering the dehydrogenation reaction heating furnace can be preheated by using the flue gas discharged by the dehydrogenation reaction heating furnace, the temperature of the propane gas is increased, heat recycling is effectively realized, the heating energy consumption of the propane gas is reduced, and the production cost is reduced. Meanwhile, the situation that impurities in smoke enter the heat transfer pipes and the heat exchange pipes to cause blockage and affect the heat exchange effect can be avoided, and the heat exchange efficiency between the heat exchange pipes can be improved by controlling the heat exchange pipes to rotate and increasing the contact surfaces and mutual contact areas of the heat exchange pipes and the heat transfer pipes and water; and the preheating effect is further improved, and the energy-saving effect is remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of energy conservation of chemical equipment, and particularly to an energy-saving device for a feed heating furnace in propane dehydrogenation reaction. Background Art

[0002] In the propane dehydrogenation process, as a core equipment, the energy consumption and thermal efficiency of the feed heating furnace have a significant impact on the economy and environmental protection of the entire production process. Currently, the global propane dehydrogenation industry scale continues to expand, and the requirements for production efficiency and energy conservation and emission reduction are becoming increasingly stringent. The technical shortcomings of traditional propane dehydrogenation reaction feed heating furnaces are becoming more and more prominent.

[0003] Existing heating furnaces generally have serious problems of heat waste. On the one hand, when the heating furnace is operating, a large amount of heat is directly discharged into the atmosphere through the smoke exhaust pipe along with the high-temperature flue gas. This part of the heat is not effectively recovered and utilized, resulting in great energy loss. According to relevant data statistics, the heat loss of the flue gas in a conventional heating furnace accounts for 15%-30% of the total input heat. On the other hand, the heat insulation performance of the heating furnace body is poor, resulting in the continuous dissipation of heat in the furnace to the surrounding environment, further reducing the energy utilization rate. For example, some heating furnaces use a single-layer heat insulation structure, which cannot effectively block heat transfer, and the surface temperature of the furnace body is too high, not only wasting energy but also posing a safety hazard.

[0004] In the heat exchange link, the efficiency and stability of the existing technology are also not satisfactory. Traditional heat exchange devices, such as simple tubular heat exchangers, have limited heat transfer area and structures that are not conducive to the full contact of hot and cold fluids, resulting in low heat exchange efficiency and being difficult to meet the precise control requirements of the feed temperature in propane dehydrogenation reaction. In addition, in actual operation, the heat exchanger is easily affected by impurities in the flue gas and trace components in the propane feed, resulting in fouling. As the operation time increases, the thermal resistance increases and the heat exchange efficiency continues to decline, not only increasing the equipment maintenance cost but also affecting the continuity and stability of production.

[0005] In summary, the existing propane dehydrogenation reaction feed heating furnaces have many deficiencies in heat recovery, heat exchange efficiency, and heat insulation performance, and there is an urgent need to develop a new type of energy-saving device to improve energy utilization efficiency, reduce production costs, and meet the requirements of the sustainable development of the industry.

[0006] Therefore, the present invention proposes an energy-saving device for a propane dehydrogenation reaction feed heating furnace to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to solve the shortcomings of the existing technology and propose an energy-saving device for a propane dehydrogenation reaction feed heating furnace.

[0008] The above technical object of the present invention is achieved through the following technical solutions: An energy-saving device for a propane dehydrogenation reaction feed heating furnace, comprising a support frame, a pallet, a heat exchange tank, a dehydrogenation reaction heating furnace, a smoke exhaust pipe, an inlet pipe I, a filtering component I, a filtering component II, a driving component, a transmission component, a heat transfer pipe, and a heat exchange pipe;

[0009] The dehydrogenation reaction heating furnace and the pallet are both fixedly installed on the support frame. The heat exchange tank is fixedly installed on the pallet, and a net plate arranged in an arc shape is fixedly installed inside the heat exchange tank. The smoke exhaust pipe and the inlet pipe I are both fixedly installed on the dehydrogenation reaction heating furnace, and a heat insulation sleeve I is fixedly installed on the outer side of the smoke exhaust pipe and is fixedly connected to the support frame. The filtering component I is arranged on the smoke exhaust pipe. Communication pipes and a smoke outlet pipe are respectively fixedly installed on both sides of the heat exchange tank. The heat transfer pipe is arranged inside the heat exchange tank and is communicated with the smoke outlet pipe and the communication pipe. Rotating pipes are rotatably installed on both sides of the heat exchange tank. The heat exchange pipe is arranged inside the heat exchange tank and is communicated with the two rotating pipes, and the heat exchange pipe is in contact with the heat transfer pipe. The rotating pipe on the left is in sealed rotational connection with the inlet pipe I. The transmission component is arranged on the communication pipe and the rotating pipe on the left and is connected to the transmission component. The driving component is arranged on the transmission component and the rotating pipe on the left. The filtering component II is arranged on the support frame. An inlet pipe II and an inlet pipe III are arranged on the filtering component II, and the inlet pipe II is in sealed rotational connection with the rotating pipe on the right;

[0010] A scraping strip that is in contact with the inner wall of the heat exchange tank and is arranged in a spiral shape is movably installed at a position outside the heat transfer pipe inside the heat exchange tank;

[0011] The dehydrogenation reaction heating furnace adopts a multi-layer composite heat insulation structure, and from the inside to the outside, it is sequentially a ceramic fiber heat insulation layer with high temperature resistance, a rock wool heat insulation layer, a cavity, and a metal protection layer. A plurality of support bars fixedly connected to the metal protection layer and the rock wool heat insulation layer are fixedly installed inside the cavity.

[0012] Preferably, the filtering component I includes a filter plate I, a filter box I, and a slag discharge pipe I. The filter box I is fixedly installed on the smoke exhaust pipe. The filter plate I is fixedly installed in an inclined shape inside the filter box I. The slag discharge pipe I is fixedly installed on the filter box I, and the slag discharge pipe I is flush with the top side of the filter plate I.

[0013] Preferably, the filtering component II includes a filter box II, a filter plate II, and a slag discharge pipe II. The filter box II is fixedly installed on the support frame. The filter plate II arranged in a spherical shape is fixedly installed inside the filter box II. The inlet pipe III and the inlet pipe II are respectively fixedly installed on both sides of the filter box II, and the filter plate II and the inlet pipe II are on the same axis. The slag discharge pipe II is fixedly installed at the bottom of the filter box II.

[0014] Preferably, the transmission assembly includes a sealed rotating sleeve, a belt and two belt pulleys. A same sealed rotating sleeve is fixedly and rotatably installed on the communication pipe and the first filter tank. Belt pulleys are fixedly sleeved on both the sealed rotating sleeve and the rotating pipe on the left side. A same belt is connected to the two belt pulleys for transmission.

[0015] Preferably, the driving assembly includes two cross-shaped rods and a plurality of fan blades. Cross-shaped rods are fixedly installed in both the sealed rotating sleeve and the rotating pipe on the left side. A plurality of fan blades located on the same axis are fixedly sleeved on the cross-shaped rods. The fan blades located in the sealed rotating sleeve and the fan blades located in the rotating pipe on the left side face in opposite directions.

[0016] Preferably, a water inlet pipe, a water outlet pipe, a slag discharge pipe and a water level pipe are fixedly installed on the heat exchange tank. The water inlet pipe, the water outlet pipe and the slag discharge pipe are respectively located at the top and both sides of the heat exchange tank. The water outlet pipe and the slag discharge pipe are respectively communicated with the top side and the bottom side of the mesh plate. Valves are provided on both the water outlet pipe and the slag discharge pipe.

[0017] Preferably, both the heat transfer pipe and the heat exchange pipe are arranged in a spiral shape, and the cross sections of the heat transfer pipe and the heat exchange pipe are both rectangular.

[0018] Preferably, the exhaust pipe is arranged with variable diameter.

[0019] Preferably, the transmission assembly can also be a hollow pipe and two gears. A same hollow pipe is fixedly and rotatably installed on the communication pipe and the first filter tank. Gears are fixedly sleeved on both the hollow pipe and the rotating pipe on the left side. The two gears are meshed with each other. In this state, the cross-shaped rod located above is fixedly installed on the inner wall of the hollow pipe, and the fan blades located in the hollow pipe face in the same direction as the fan blades located in the rotating pipe on the left side.

[0020] Preferably, a spiral-shaped return pipe is fixedly installed on the second intake pipe. Both ends of the return pipe are communicated with the heat exchange tank. A second heat insulation sleeve fixedly connected to the return pipe is fixedly sleeved on the outer side of the second intake pipe. The cross section of the part of the return pipe located on the second intake pipe is semicircular.

[0021] The beneficial effects of the present invention are:

[0022] By means of the provided support frame, pallet, heat exchange tank, dehydrogenation reaction heating furnace, exhaust pipe, inlet pipe 1, filter assembly 1, filter assembly 2, drive assembly, transmission assembly, heat transfer pipe and heat exchange pipe, during use, the user first feeds the propane that needs to undergo dehydrogenation reaction into the dehydrogenation reaction heating furnace through the cooperation of components such as inlet pipe 3, inlet pipe 2 and inlet pipe 1. At the same time, the dehydrogenation reaction heating furnace is started to perform dehydrogenation operation on the propane. During this process, the generated flue gas will be discharged through the exhaust pipe. During the discharge process, the flue gas will be filtered for impurities in the flue gas under the action of filter assembly 1 to prevent impurities from entering the heat transfer pipe and causing adhesion. At the same time, the filtered flue gas will enter the heat transfer pipe through the sealing sleeve and the connecting pipe and perform heat exchange operation with the water in the heat exchange tank. Since both the heat transfer pipe and the heat exchange pipe are arranged in a spiral shape and the cross-section is set as a rectangle, it can effectively increase the mutual contact area between the heat transfer pipe and the heat exchange pipe and the water, as well as the contact area between the heat transfer pipe and the heat exchange pipe with each other. Thus, efficient heat transfer can be carried out through multiple heat conduction methods at the same time, and then the heat in the flue gas can be effectively extracted and utilized.

[0023] When the flue gas passes through the connecting pipe, the left rotating pipe can be driven to rotate under the cooperation of the drive assembly and the transmission assembly. Thus, the heat exchange pipe can be controlled to rotate around the rotating pipe in cooperation with the right rotating pipe. At the same time, the heat exchange pipe will also generate friction with the heat transfer pipe, thereby further improving the heat exchange efficiency. And the flue gas after heat exchange operation will be discharged through the smoke outlet pipe.

[0024] When feeding materials into the dehydrogenation reaction heating furnace, impurities will be filtered under the action of filter assembly 2 to prevent impurities from adhering to the inner side wall when passing through the heat exchange pipe. And the filtered gas will enter the heat exchange pipe through inlet pipe 2 and absorb heat to achieve preheating, and then be sent into the dehydrogenation reaction heating furnace through inlet pipe 1. In addition, the provided return pipe can preheat the intake gas that has been filtered and flows through inlet pipe 2. At the same time, the setting of heat insulation sleeve 2 can greatly reduce the heat loss on the return pipe, thereby further improving the utilization rate of heat, and then being able to make full use of the heat in the flue gas and greatly improving the energy-saving effect. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1Schematic three-dimensional structure diagram of an energy-saving device for a propane dehydrogenation reaction feed heating furnace proposed by the present invention;

[0027] Figure 2 It is Figure 1 Partial sectional structure diagram;

[0028] Figure 3 It is Figure 2 Structure diagram from another perspective;

[0029] Figure 4 It is Figure 1 Partial three-dimensional structure diagram;

[0030] Figure 5 Partial sectional structure diagram of the heat exchange tank, mesh plate, water inlet pipe, water outlet pipe and slag discharge pipe proposed by the present invention;

[0031] Figure 6 Schematic three-dimensional structure diagram of the heat exchange tube, heat transfer tube, belt pulley, belt, sealing rotating sleeve, connecting pipe, smoke outlet pipe, inlet gas pipe I, rotating pipe, inlet gas pipe II, inlet gas pipe III and filter assembly II proposed by the present invention;

[0032] Figure 7 It is Figure 6 Partial three-dimensional structure diagram;

[0033] Figure 8 It is Figure 7 Enlarged view of part A in

[0034] Figure 9 Schematic three-dimensional structure diagram of the scraping strip arranged in a spiral shape proposed by the present invention;

[0035] Figure 10 Partial sectional structure diagram of the belt, belt pulley, slag discharge pipe I, connecting pipe, sealing rotating sleeve, inlet gas pipe I and left rotating pipe, as well as the smoke exhaust pipe, heat insulation layer I, filter box I and filter plate part proposed by the present invention;

[0036] Figure 11 It is Figure 10 Partial three-dimensional structure diagram;

[0037] Figure 12 Structure diagram of the cross-shaped rod and fan blade part proposed by the present invention;

[0038] Figure 13 Schematic structure diagram of the second embodiment of an energy-saving device for a propane dehydrogenation reaction feed heating furnace proposed by the present invention;

[0039] Figure 14 It is Figure 13 Structure diagram from another perspective;

[0040] Figure 15 is Figure 13 a schematic diagram of the local three-dimensional structure of

[0041] Figure 16 a schematic diagram of the structure of the third embodiment of an energy-saving device for a propane dehydrogenation reaction feed heating furnace proposed by the present invention;

[0042] Figure 17 is Figure 16 a schematic diagram of the structure from another perspective;

[0043] Figure 18 is Figure 16 a schematic diagram of the partial sectional structure of

[0044] In the figure: 1, support frame; 11, pallet; 12, heat exchange tank; 1201, mesh plate; 1202, slag discharge pipe; 1203, water level pipe; 1204, water inlet pipe; 1205, water outlet pipe; 121, scraping bar; 2, dehydrogenation reaction heating furnace; 201, ceramic fiber heat insulation layer; 202, rock wool thermal insulation layer; 2021, support bar; 203, metal protection layer; 21, smoke exhaust pipe; 211, heat insulation sleeve one; 22, filter box one; 221, filter plate one; 222, slag discharge pipe one; 23, connecting pipe; 24, heat transfer pipe; 25, smoke outlet pipe; 26, inlet gas pipe one; 27, rotating pipe; 28, heat exchange pipe; 29, inlet gas pipe two; 291, filter box two; 292, filter plate two; 293, slag discharge pipe two; 294, inlet gas pipe three; 3, sealing rotating sleeve; 301, cross-shaped rod; 302, fan blade; 31, belt pulley; 32, belt; 4, hollow pipe; 41, gear; 5, return pipe; 51, heat insulation sleeve two. Specific Embodiments

[0045] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0046] Embodiment 1

[0047] Refer to Figures 1 - 12, an energy-saving device for a propane dehydrogenation reaction feed heating furnace, comprising a support frame 1, a pallet 11, a heat exchange tank 12, a dehydrogenation reaction heating furnace 2, a smoke exhaust pipe 21, an inlet pipe 1 26, a heat transfer pipe 24 and a heat exchange pipe 28. The dehydrogenation reaction heating furnace 2 and the pallet 11 are both fixedly installed on the support frame 1. The heat exchange tank 12 is fixedly installed on the pallet 11, and a net plate 1201 arranged in an arc shape is fixedly installed inside the heat exchange tank 12. The smoke exhaust pipe 21 and the inlet pipe 1 26 are both fixedly installed on the dehydrogenation reaction heating furnace 2, and a first heat insulation sleeve 211 is fixedly installed on the outer side of the smoke exhaust pipe 21 and fixedly connected to the support frame 1. The setting of the first heat insulation sleeve 211 can greatly reduce the heat loss of the smoke exhaust pipe 21 during the transportation of high-temperature flue gas. One end of the smoke exhaust pipe 21 far from the dehydrogenation reaction heating furnace 2 is fixedly installed with a first filter box 22. A first filter plate 221 is fixedly installed in the first filter box 22 in an inclined shape. A first slag discharge pipe 222 is fixedly installed on the first filter box 22, and the first slag discharge pipe 222 is flush with the top side of the first filter plate 221, which can filter the sundries in the high-temperature flue gas discharged from the dehydrogenation reaction heating furnace 2 and achieve the effect of temporary storage, avoiding the situation that the sundries in the flue gas adhere to the inner side wall of the heat transfer pipe 24 after passing through the heat transfer pipe 24, and at the same time can also effectively reduce the impact of the sundries mixed in the flue gas on the environment when the flue gas is finally discharged;

[0048] On both sides of the heat exchange tank 12, a communicating pipe 23 and a smoke outlet pipe 25 connected to the heat exchange tank 12 are respectively fixedly installed. The heat transfer pipe 24 is arranged inside the heat exchange tank 12 and is connected to the smoke outlet pipe 25 and the communicating pipe 23 and keeps a fixed connection state. Rotating pipes 27 are rotatably installed on both sides of the heat exchange tank 12. The heat exchange pipe 28 is arranged inside the heat exchange tank 12 and is connected to the two rotating pipes 27, and the heat exchange pipe 28 keeps a fixed connection state with the two rotating pipes 27. In addition, the heat exchange pipe 28 is in contact with the heat transfer pipe 24. The rotating pipe 27 on the left is hermetically and rotatably connected to the inlet pipe 1 26;

[0049] Among them, in order to effectively increase the contact area between the heat transfer pipe 24 and the heat exchange pipe 28 and water, as well as between the heat transfer pipe 24 and the heat exchange pipe 28, so as to achieve the effect of greatly improving the heat transfer and heat exchange efficiency, and further achieve the purpose of being able to utilize heat more efficiently, both the heat transfer pipe 24 and the heat exchange pipe 28 are arranged in a spiral shape, and the cross sections of the heat transfer pipe 24 and the heat exchange pipe 28 are both rectangular;

[0050] A connecting pipe 23 and a filter box 22 are hermetically and rotatably installed with the same sealing rotating sleeve 3. Pulley 31 is fixedly sleeved on both the sealing rotating sleeve 3 and the rotating pipe 27 on the left side. The same belt 32 is drivingly connected between the two pulleys 31, enabling the sealing rotating sleeve 3 and the rotating pipe 27 on the left side to rotate synchronously when rotating. Cross-shaped rods 301 are fixedly installed inside both the sealing rotating sleeve 3 and the rotating pipe 27 on the left side. Multiple fan blades 302 located on the same axis are fixedly sleeved on the cross-shaped rods 301. The fan blades 302 located inside the sealing rotating sleeve 3 and the rotating pipe 27 on the left side face in opposite directions, capable of providing driving force when air flows through the sealing rotating sleeve 3 and the rotating pipe 27 on the left side, so as to be able to control the heat exchange pipe 28 to rotate around the rotating pipe 27 in cooperation with the two rotating pipes 27, thereby improving the heat exchange efficiency of the heat exchange pipe 28. At the same time, since the heat exchange pipe 28 and the heat transfer pipe 24 are in contact with each other, it is possible to maintain contact and generate friction with the heat transfer pipe 24 when the heat exchange pipe 28 rotates, enabling the heat exchange pipe 28 to achieve heat exchange operations through multiple methods simultaneously;

[0051] A scraping strip 121 that is in contact with the inner wall of the heat exchange tank 12 and is arranged in a spiral shape is movably installed at a position outside the heat transfer pipe 24 inside the heat exchange tank 12. It can drive the scraping strip 121 by using the disturbance of the water flow in the heat exchange tank 12 when the heat exchange pipe 28 rotates, so as to cooperate with the flow of the water flow to clean the possible sundries adhered to the screen plate 1201 and the inner wall of the heat exchange tank 12. In this state, it is only necessary for the scraping strip 121 to be able to move to achieve this effect. Since the scraping strip 121 is arranged in a spiral shape, the disturbance of the water flow can drive the scraping strip 121 to move.

[0052] A filter box 291 is fixedly installed on the support frame 1. A filter plate 292 arranged in a spherical shape is fixedly installed inside the filter box 291. An air inlet pipe 294 and an air inlet pipe 29 are respectively fixedly installed on both sides of the filter box 291. The filter plate 292 and the air inlet pipe 29 are on the same axis, and the air inlet pipe 29 is hermetically and rotatably connected to the rotating pipe 27 on the right side. A slag discharge pipe 293 is fixedly installed at the bottom of the filter box 291, capable of achieving a filtering effect when feeding the dehydrogenation reaction heating furnace 2, avoiding the situation where sundries adhere to the inner side wall of the heat exchange pipe 28 when passing through the heat exchange pipe 28;

[0053] Control valves are provided on both the slag discharge pipe 222 and the slag discharge pipe 293;

[0054] The dehydrogenation reaction heating furnace 2 adopts a multi-layer composite heat insulation structure, which from the inside to the outside is successively a ceramic fiber heat insulation layer 201 with high temperature resistance, a rock wool heat insulation layer 202, a cavity and a metal protection layer 203. The ceramic fiber heat insulation layer 201 can withstand the direct scouring of high-temperature flames and at the same time has good heat insulation performance. The rock wool heat insulation layer 202 further prevents heat from conducting outward. The metal protection layer 203 plays a role in protecting the internal rock wool heat insulation layer 202 and extends the service life of the heat insulation structure. During the operation of the dehydrogenation reaction heating furnace 2, the high-temperature environment inside the dehydrogenation reaction heating furnace 2 causes the wall temperature of the dehydrogenation reaction heating furnace 2 to rise. However, the dehydrogenation reaction heating furnace 2 designed with a multi-layer composite heat insulation structure can effectively prevent heat from dissipating to the surrounding environment. Among them, the ceramic fiber heat insulation layer 201 first blocks most of the heat, and the rock wool heat insulation layer 202 further reduces the heat conduction, making the surface temperature of the furnace body of the dehydrogenation reaction heating furnace 2 close to the ambient temperature. The setting of the cavity can further improve the heat insulation effect, reduce the ineffective loss of heat, and improve the thermal efficiency of the heating furnace.

[0055] In this embodiment, in order to facilitate the injection and drainage of water into and from the heat exchange tank 12 and discharge the sundries after passing through the mesh plate 1201, and at the same time achieve the purpose of facilitating the observation and understanding of the water level height in the heat exchange tank 12, a water inlet pipe 1204, a water outlet pipe 1205, a slag discharge pipe 1202 and a water level pipe 1203 are fixedly installed on the heat exchange tank 12. The water inlet pipe 1204, the water outlet pipe 1205 and the slag discharge pipe 1202 are respectively located at the top and both sides of the heat exchange tank 12. The water outlet pipe 1205 and the slag discharge pipe 1202 are respectively communicated with the top side and the bottom side positions of the mesh plate 1201, and valves are provided on both the water outlet pipe 1205 and the slag discharge pipe 1202.

[0056] In this embodiment, in order to enable the flue gas discharged through the flue gas pipe 21 to achieve an acceleration effect during the discharge process, the flue gas pipe 21 is arranged with a variable diameter, that is, the inner diameter of the end of the flue gas pipe 21 far from the dehydrogenation reaction heating furnace 2 becomes smaller. This method is realized by using Bernoulli's principle.

[0057] In this embodiment, when adding gaseous materials into the dehydrogenation reaction heating furnace 2, they are introduced from the right end position of the third inlet pipe 294 and enter the second filter box 291. Then, they are transported into the dehydrogenation reaction heating furnace 2 via the second inlet pipe 29, the rotating pipe 27 on the right side, the heat exchange pipe 28, the rotating pipe 27 on the left side, and the first inlet pipe 26. During this process, when the gas transfers from the second filter box 291 into the second inlet pipe 29, it is filtered under the action of the second filter plate 292 arranged in a spherical shape, enabling intake air filtration and intercepting debris, preventing debris from passing through the heat exchange pipe 28. In this way, it can effectively avoid the wall sticking phenomenon caused by debris in the gas passing through the heat exchange pipe 28 for a long time, greatly reducing the difficulty of later maintenance. At the same time, it can also avoid heat loss caused by debris adhesion and the reduction of the service life of the heat exchange pipe 28. The high-temperature flue gas discharged from the dehydrogenation reaction heating furnace 2 is transported along the exhaust pipe 21 to the first filter box 22, and outlet air filtration is achieved under the action of the first filter plate 221 arranged in an inclined shape. This can not only avoid the wall sticking phenomenon that may occur when the high-temperature flue gas passes through the heat transfer pipe 24 and the harm to the environment when it is discharged through the smoke outlet pipe 25. The filtered flue gas enters the heat transfer pipe 24 after passing through the sealing rotating sleeve 3 and the connecting pipe 23. The heat transfer pipe 24 transfers heat to the water in the heat exchange tank 12. At the same time, since both the heat exchange pipe 28 and the heat transfer pipe 24 are arranged in a spiral shape and their cross-sections are designed as rectangles, both the heat transfer pipe 24 and the heat exchange pipe 28 can effectively increase the contact area with water, and a large contact surface can also be maintained between the heat transfer pipe 24 and the heat exchange pipe 28. Thus, the effect of heat transfer can be achieved through multiple heat conduction methods, enabling more efficient preheating of the intake gas in the heat exchange pipe 28.

[0058] Due to the variable diameter setting of the exhaust pipe 21, the Bernoulli principle can be utilized to accelerate the gas when the high-temperature flue gas passes through. When the high-temperature gas passes through the sealing rotating sleeve 3, multiple fan blades 302 cooperate with the cross-shaped rod 301 to control the rotation of the sealing rotating sleeve 3, thereby providing drive for the rotating rod on the left side in cooperation with the belt pulley 31 and the belt 32. When the rotating pipe 27 intakes air, it also drives the fan blades 302 arranged inside it to rotate, enabling the heat exchange pipe 28 to rotate around the two rotating pipes 27 as the center, further improving the heat exchange efficiency of the heat exchange pipe 28. When the spiral heat exchange pipe 28 rotates, it disturbs the water in the heat exchange tank 12. As the water flow is disturbed, the spiral scraping strip 121 movably installed in the heat exchange tank 12 can show a moving effect. At the same time, under the interference of the disturbed water flow, the inner wall of the heat exchange tank 12 and the top side of the mesh plate 1201 can be cleaned, avoiding the adhesion of debris and scale to the mesh plate 1201, and facilitating the sinking of debris and scale below the mesh plate 1201 after passing through the mesh plate 1201.

[0059] Embodiment Two

[0060] Please refer to Figures 13 - 15 , in this embodiment, different from the first embodiment, the sealing rotating sleeve 3 installed between the connecting pipe 23 and the first filter box 22 is replaced with a hollow pipe 4, and the cross-shaped rod 301 originally located in the sealing rotating sleeve 3 is fixedly installed on the inner wall of the hollow pipe 4. The original belt pulley 31 and belt 32 for transmission are replaced with two meshing gears 41. Additionally, it should be noted that according to the setting method in the second embodiment, the orientations of the multiple upper fan blades 302 and the multiple lower fan blades 302 should be adjusted to the same direction. This design method can drive the hollow pipe 4 to rotate when the flue gas flows through the hollow pipe 4 towards the connecting pipe 23, and thus can drive the left rotating pipe 27 to rotate under the cooperation of the two meshing gears 41. This design method is more suitable for the situation where the distance between the connecting pipe 23 and the left rotating pipe 27 is relatively close. At the same time, compared with the belt drive method, there is no need to focus on the possible influence of high temperature on the service life of the belt 32.

[0061] In this embodiment, during use, when the high-temperature flue gas is transported from the first filter box 22 towards the connecting pipe 23, it will pass through the hollow pipe 4. The fan blades 302 arranged above in the hollow pipe 4 will control the rotation of the hollow pipe 4 under the influence of the flow of the filtered flue gas, and then drive the left rotating pipe 27 to drive the heat exchange pipe 28 to rotate in the heat exchange tank 12 through the transmission of the two meshing gears 41. And this design method will make the heat exchange pipe 28 rotate in the opposite direction to the heat exchange pipe 28 in the first embodiment.

[0062] Embodiment Three

[0063] Please refer to Figures 16 - 18, in this embodiment, based on Embodiment 2, the heat convection effect that occurs when the water in the heat exchange tank 12 is heated is utilized to divert the relatively hot water to the position of the second intake pipe 29 through the return pipe 5 to preheat the gaseous material passing through the second intake pipe 29. This can further improve the utilization rate of heat, thereby better achieving the energy-saving effect. First, a return pipe 5 arranged in a spiral shape is fixedly installed on the second intake pipe 29. Both ends of the return pipe 5 are communicated with the heat exchange tank 12. An insulating sleeve II 51 fixedly connected to the return pipe 5 is fixedly sleeved on the outer side of the second intake pipe 29. The setting of the insulating sleeve II 51 can effectively reduce the heat dissipation of the hot water when passing through the return pipe 5. For the part of the return pipe 5 located on the second intake pipe 29, its cross-section is semicircular, which can increase the contact surface with the second intake pipe 29, thereby achieving the effect of efficient heat transfer, enabling efficient preheating operation of the filtered intake air, and further improving the utilization rate of heat. It should be noted that in order to ensure that the water can flow smoothly and stably through the return pipe 5, a water pump for transporting water flow (not shown in the figure) should also be provided on the return pipe 5. In this way, forced heat convection can be achieved, thereby further improving the preheating effect on the gaseous material passing through the second intake pipe 29.

[0064] In this embodiment, during use, the water in the heat exchange tank 12 will increase in temperature due to the heat transfer of the heat transfer pipe 24. The increase in water temperature will cause an obvious heat convection phenomenon. At the same time, with the cooperation of the water pump, the hot water can flow stably from top to bottom through the return pipe 5 and transfer the heat to the second intake pipe 29. This process can achieve the purpose of preheating the gaseous material passing through the second intake pipe 29. Adopting such a design method aims to further increase the utilization rate of the heat in the flue gas, thereby achieving a better energy-saving effect.

[0065] The above has introduced in detail a propane dehydrogenation reaction feed heating furnace energy-saving device provided by the present invention. Specific embodiments are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A propane dehydrogenation reaction feed heating furnace energy-saving device, characterized in that: It comprises a support frame (1), a support plate (11), a heat exchange tank (12), a dehydrogenation reaction heating furnace (2), a smoke exhaust pipe (21), an air intake pipe (26), a filter component (1), a filter component (2), a drive component, a transmission component, a heat transfer pipe (24) and a heat exchange pipe (28); The dehydrogenation reaction heating furnace (2) and the support plate (11) are both fixedly mounted on the support frame (1), the heat exchange tank (12) is fixedly mounted on the support plate (11), and a mesh plate (1201) arranged in an arc shape is fixedly mounted inside the heat exchange tank (12), the smoke exhaust pipe (21) and the air intake pipe (26) are both fixedly mounted on the dehydrogenation reaction heating furnace (2), and a heat insulation sleeve (211) is fixedly mounted on the outer side of the smoke exhaust pipe (21) and is fixedly connected to the support frame (1), the filter assembly (1) is arranged on the smoke exhaust pipe (21), a connecting pipe (23) and a smoke outlet pipe (25) are respectively fixedly mounted on both sides of the heat exchange tank (12), and the heat transfer pipe (24) is arranged inside the heat exchange tank (12) and is connected to the smoke outlet pipe (25) and the connecting pipe (23). The heat exchange tank (12) is connected to the heat exchange tank (12), and rotating tubes (27) are rotatably installed on both sides of the heat exchange tank (12). The heat exchange tube (28) is arranged in the heat exchange tank (12) and is connected to the two rotating tubes (27), and the heat exchange tube (28) is in contact with the heat transfer tube (24). The rotating tube (27) on the left side is sealed and rotatably connected to the intake pipe (26). The transmission component is arranged on the connecting pipe (23) and the rotating tube (27) on the left side and is connected to the transmission component. The drive component is arranged on the transmission component and the rotating tube (27) on the left side. The filter component 2 is arranged on the support frame (1). The filter component 2 is provided with an intake pipe 2 (29) and an intake pipe 3 (294), and the intake pipe 2 (29) is sealed and rotatably connected to the rotating tube (27) on the right side. A scraper (121) is movably installed at a position outside the heat transfer tube (24) in the heat exchange tank (12) and is in contact with the inner wall of the heat exchange tank (12) and is arranged in a spiral shape; The dehydrogenation reaction heating furnace (2) adopts a multi-layer composite insulation structure, and from the inside to the outside, it comprises a ceramic fiber insulation layer (201) with high temperature resistance, a rock wool insulation layer (202), a cavity and a metal protective layer (203), and a plurality of support bars (221) fixedly installed in the cavity and fixedly connected to the metal protective layer (203) and the rock wool insulation layer (202).

2. The energy-saving device for a propane dehydrogenation reaction feed heating furnace according to claim 1, characterized in that: The filter assembly comprises a filter plate (221), a filter box (22) and a slag discharge pipe (222); the filter box (22) is fixedly mounted on the smoke exhaust pipe (21); a filter plate (221) is fixedly mounted in an inclined manner in the filter box (22); a slag discharge pipe (222) is fixedly mounted on the filter box (22); and the slag discharge pipe (222) is flush with the top side of the filter plate (221).

3. The energy-saving device for a propane dehydrogenation reaction feed heating furnace according to claim 1, characterized in that: The second filter assembly comprises a second filter box (291), a second filter plate (292) and a second slag discharge pipe (293). The second filter box (291) is fixedly mounted on the support frame (1). A second filter plate (292) arranged in a spherical shape is fixedly mounted in the second filter box (291). An air intake pipe (294) and an air intake pipe (29) are respectively fixedly mounted on both sides of the second filter box (291). The second filter plate (292) and the second air intake pipe (29) are located on the same axis. A second slag discharge pipe (293) is fixedly mounted at the bottom of the second filter box (291).

4. The energy-saving device for a propane dehydrogenation reaction feed heating furnace according to claim 2, characterized in that: The transmission assembly comprises a sealing rotating sleeve (3), a belt (32) and two pulleys (31); the connecting pipe (23) and the filter box (22) are sealed and rotatably mounted with the same sealing rotating sleeve (3); the sealing rotating sleeve (3) and the left rotating pipe (27) are both fixedly sleeved with pulleys (31); and the two pulleys (31) are transmission-connected with the same belt (32).

5. The energy-saving device for a propane dehydrogenation reaction feed heating furnace according to claim 4, characterized in that: The driving assembly comprises two cross-shaped rods (301) and a plurality of fan blades (302); the cross-shaped rods (301) are fixedly installed in the sealing rotating sleeve (3) and the rotating tube (27) on the left side; a plurality of fan blades (302) located on the same axis are fixedly sleeved on the cross-shaped rod (301); the fan blades (302) located in the sealing rotating sleeve (3) and the rotating tube (27) on the left side face in opposite directions.

6. The energy-saving device for a propane dehydrogenation reaction feed heating furnace according to claim 1, characterized in that: A water inlet pipe (1204), a water outlet pipe (1205), a slag discharge pipe (1202) and a water level pipe (1203) are fixedly installed on the heat exchange tank (12), and the water inlet pipe (1204), the water outlet pipe (1205) and the slag discharge pipe (1202) are respectively located at the top and both sides of the heat exchange tank (12), the water outlet pipe (1205) and the slag discharge pipe (1202) are respectively connected to the top side and the bottom side of the mesh plate (1201), and valves are provided on the water outlet pipe (1205) and the slag discharge pipe (1202).

7. The energy-saving device for a propane dehydrogenation reaction feed heating furnace according to claim 1, characterized in that: The heat transfer tube (24) and the heat exchange tube (28) are both arranged in a spiral shape, and the cross-sections of the heat transfer tube (24) and the heat exchange tube (28) are both arranged in a rectangular shape.

8. The energy-saving device for a propane dehydrogenation reaction feed heating furnace according to claim 1, characterized in that: The smoke exhaust pipe (21) is configured with a variable diameter.

9. The energy-saving device for a propane dehydrogenation reaction feed heating furnace according to claim 5, characterized in that: The transmission assembly may also be a hollow tube (4) and two gears (41); the connecting tube (23) and the filter box (22) are sealed and rotatably mounted with the same hollow tube (4); the hollow tube (4) and the left rotating tube (27) are both fixedly sleeved with gears (41); the two gears (41) are meshed; in this state, the cross-shaped rod (301) located at the top is fixedly mounted on the inner wall of the hollow tube (4); and the direction of the fan blades (302) located in the hollow tube (4) is maintained in the same direction as the direction of the fan blades (302) located in the left rotating tube (27).

10. The energy-saving device for a propane dehydrogenation reaction feed heating furnace according to claim 1, characterized in that: A return pipe (5) arranged in a spiral shape is fixedly installed on the second intake pipe (29), and both ends of the return pipe (5) are connected to the heat exchange tank (12). The outer fixed sleeve of the second intake pipe (29) is provided with a second heat insulation sleeve (51) fixedly connected to the return pipe (5), and the cross-section of the part of the return pipe (5) located on the second intake pipe (29) is arranged in a semicircular shape.

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