A heat exchanger which is easy to maintain

Abstract

The present application provides a kind of heat exchanger of convenient maintenance, comprising: mixed hydrogen pipe process cylinder, raw material shell process cylinder and purification tank, raw material shell process cylinder is welded in mixed hydrogen pipe process cylinder outside, fixed block is equipped below mixed hydrogen pipe process cylinder top, fixed rod three is equipped below fixed block, driving disc is equipped below fixed rod three, limit block one is equipped below driving disc, compared with prior art, the present application has the beneficial effects as follows: by setting driving disc, gear ring one, connecting rod one and brush one, driving disc rotation drives gear ring one to rotate, so as to drive brush one to clean cold mixed hydrogen output port by connecting rod one, by setting gear one, gear two, gear three, driven disc, rotating shaft two and stirring vane, gear one drives gear two to rotate, gear two drives gear three to rotate, gear three drives driven disc to rotate to drive rotating shaft two to rotate, so that stirring vane rotates to accelerate hydrogen removal.

Description

Technical Field

[0001] This invention belongs to the field of heat exchanger technology, and specifically relates to a heat exchanger that is easy to maintain. Background Technology

[0002] Methanol reforming is a common method for hydrogen production, which requires the use of heat exchangers to maintain the reaction temperature.

[0003] In the design of heat exchangers, ease of maintenance must be considered to ensure convenient operation when cleaning or maintenance is required. If the heat exchanger lacks mechanisms for purifying hydrogen, cleaning the outlet, accelerating gas flow, and sealing, the following problems will occur:

[0004] First, since there is no hydrogen purification mechanism, there may be other impurities in the hydrogen, which will affect the subsequent use of hydrogen.

[0005] Furthermore, if the outlet mechanism is not cleaned, it can easily lead to poor hydrogen output or even blockage, affecting the normal operation of the entire reaction system.

[0006] Secondly, without a mechanism to accelerate gas flow, the hydrogen flow rate is slow, which may lead to untimely reactions and thus affect the efficiency of methanol reforming to produce hydrogen.

[0007] At the same time, insufficient hydrogen flow speed can also cause impurities in the hydrogen to accumulate in the heat exchanger, increasing the difficulty of cleaning.

[0008] Finally, without a sealing mechanism, hydrogen may leak out, posing a safety hazard and affecting the efficiency of methanol reforming for hydrogen production. Therefore, designing a hydrogen purification mechanism, an outlet cleaning mechanism, a gas flow acceleration mechanism, and a sealing mechanism are crucial for heat exchangers in the methanol reforming for hydrogen production field. This can improve reaction efficiency, reduce cleaning difficulty, and ensure safety. Summary of the Invention

[0009] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a heat exchanger that is easy to maintain, thereby solving the problems mentioned in the background art.

[0010] This invention is achieved through the following technical solution: a heat exchanger that is easy to maintain, comprising: a mixing hydrogen tube side cylinder, a raw material shell side cylinder, and a purification box. The raw material shell side cylinder is welded to the outside of the mixing hydrogen tube side cylinder. A fixing block is provided below the top of the mixing hydrogen tube side cylinder. The fixing block has a hollow structure and several small through holes are opened at the bottom of the fixing block. A fixing rod three is provided below the fixing block. An active disk is provided below the fixing rod three. A through hole is provided in the center of the active disk. A bearing is connected and fixed inside the through hole. The bearing model is UC205 ceramic bearing. A limiting block one is provided below the active disk. The lower part of the fixing rod three passes through the lower part of the inner ring of the bearing in the center of the active disk and is connected and fixed to the top of the limiting block one.

[0011] A set of connecting rod 1 is located on the left side below the active disk, and a set of connecting rod 2 is located on the right side below the active disk. The shape, size and structure of connecting rod 1 and connecting rod 2 are exactly the same. Connecting rod 1 and connecting rod 2 are L-shaped structures. The tops of connecting rod 1 and connecting rod 2 are connected and fixed to the left and right sides of the bottom of the active disk, respectively. A brush 1 is located on the left side below connecting rod 1, and a slider 1 is located below brush 1. A brush 2 is located on the left side below connecting rod 2, and a slider 2 is located below brush 2. A circular groove is located below slider 1 and slider 2. The groove is opened on the upper surface of a set of circular baffles away from the center. The bottom center of the circular baffles is recessed inward to form a set of airflow inlets. The airflow inlets have a structure in which the aperture gradually decreases from bottom to top. The bristles of brush 1 and brush 2 are in contact with the inner wall of the mixing hydrogen tube cylinder, respectively.

[0012] A set of gear ring 1 is located at the bottom of the active disk away from the center. Several sets of fan blades are located inside the gear ring 1. A set of gear 1 is located on the right side below the gear ring 1. The top of gear 1 meshes with the right side below the gear ring 1. A rotating shaft 1 is located on the right side of gear 1. A bundle tube 2 is located outside the part of the mixing hydrogen tube cylinder of the rotating shaft 1. Through holes are opened on the left and right sides of the bundle tube 2. Bearings are fixedly connected inside the through holes. The bearings are UC205 ceramic bearings. The rotating shaft 1 is located inside the inner ring of the bearing inside the bundle tube 2. A fixing rod 4 is located at the top of the bundle tube 2. The top of the fixing rod 4 is fixed to the inner side of the top of the mixing hydrogen tube cylinder. The bottom of the fixing rod 4 is connected and fixed to the top of the bundle tube 2.

[0013] In a preferred embodiment, a safety valve interface is provided at the top of the mixed hydrogen tube side cylinder, a pressure gauge interface is provided on the left below the safety valve interface, a cold mixed hydrogen output port is provided on the right side of the pressure gauge interface, a raw material inlet is provided at the top of the raw material shell side cylinder on the left below the pressure gauge interface, two identical magnetic float level gauge interfaces are provided on the upper and lower sides of the raw material shell side cylinder below the cold mixed hydrogen output port, a raw material discharge port is provided at the bottom of the raw material shell side cylinder below the magnetic float level gauge interface, a preheated raw material output port is provided symmetrically with respect to the central axis of the raw material shell side cylinder, a hot mixed hydrogen inlet is provided on the side of the mixed hydrogen tube side cylinder below the preheated raw material output port, and a drain port is provided at the bottom of the mixed hydrogen tube side cylinder below the hot mixed hydrogen inlet.

[0014] A mixture of methanol and water is introduced into the raw material inlet and fed into the raw material shell. A hot mixed hydrogen mixture (comprising hydrogen and carbon dioxide) is introduced into the mixed hydrogen tube shell through the hot mixed hydrogen inlet, where heat exchange occurs. After heat exchange, the cold mixed hydrogen enters the purification tank through the cold mixed hydrogen outlet. The heated methanol and water mixture is discharged from the preheated raw material outlet. A magnetic level gauge is connected to the right side of the interface for easy observation of the raw material injection status inside the raw material shell. One drain outlet is used to discharge wastewater, and the raw material discharge outlet is used to discharge remaining raw material. A safety valve interface is connected to control the air pressure, and a pressure gauge interface is connected to monitor pressure changes for timely adjustments.

[0015] As a preferred embodiment, a flange 1 is provided on the right side of the cold mixed hydrogen outlet, a flange 2 is provided on the right side of the flange 1, a cold mixed hydrogen inlet 1 is provided on the right side of the flange 2, a purification box is provided on the right side of the cold mixed hydrogen inlet 1, and a set of fixing rods 2 of the same shape, size and structure are provided at the upper and lower positions on the left side of the purification box. The left side of the fixing rod 2 is welded to the upper right side of the mixed hydrogen pipe body, and the right side of the fixing rod 2 is welded to the left side of the purification box. A cold purified hydrogen outlet is provided on the top right side of the purification box.

[0016] A second drain outlet is located on the lower right side of the purification box. A drain pipe is connected to the right side of the second drain outlet. A first collecting pipe is located below the drain pipe. A set of fixing rods is located on the left side of the first collecting pipe. The left side of the first fixing rod is welded to the side of the raw material shell cylinder, and the right side of the first fixing rod is welded to the left side of the first collecting pipe. The right end of the drain pipe is bent downward at 90 degrees, passes through the first collecting pipe, and extends below the first collecting pipe. The lower end of the drain pipe is bent to the left at 90 degrees and connects to the first drain outlet. The second fixing rod serves to fix the purification box. The drain pipe serves to combine the sewage inside the first and second drain outlets. The first fixing rod and the collecting pipe together serve to fix the drain pipe.

[0017] As a preferred embodiment, a diverter is provided on the outside of the left opening of the purification box. The diverter consists of a front baffle, a rear baffle, and several sets of fixed rods eight with the same shape, size, and structure. The left side of the fixed rod eight is connected and fixed to the right side of the rear baffle, and the right side of the fixed rod eight is connected and fixed to the left side of the front baffle. Several diverting holes are opened on the right side of the front baffle, and a set of shaft holes are opened in the center of the right side of the front baffle. The through holes penetrate through the left and right sides of the front baffle.

[0018] The left and right sides of the rear baffle are through structures. The right side of the rotating shaft passes through the cold mixed hydrogen output port, and the right end of the rotating shaft passes through the shaft hole in the center of the front baffle of the splitter and extends out of the right side of the splitter. The right end of the rotating shaft is connected and fixed with gear two. In actual use, the splitter facilitates the diversion of the cold mixed hydrogen gas entering the purification box, so that the gas flow rate entering the purification box is not too large, which would cause the gas pressure inside the purification box to be too high, thereby affecting the input of cold mixed hydrogen into the purification box. The splitter can also support the rotating shaft.

[0019] As a preferred embodiment, a gear three is provided below the gear two, the top of the gear three meshes with the bottom of the gear two, a through hole is provided in the center of the gear three, and a bearing is provided inside the through hole. The bearing is a UC205 ceramic bearing. A set of fixing rod five is provided on the left side of the gear three, and the left side of the fixing rod five is connected and fixed to the left side of the purification box.

[0020] The right side of the fixing rod five is placed inside the bearing inner ring inside the gear three-way hole. The left and right positions of the connection between the fixing rod five and the gear three are provided with limiting mechanisms. The outside of the fixing rod five is provided with a bundle tube three. The bottom of the bundle tube three is connected and fixed to the fixing rod six. The bottom of the fixing rod six is ​​connected and fixed to the bottom of the purification box. The top of the fixing rod six is ​​fixed to the bottom of the bundle tube three. Through the meshing of gear two and gear three, the rotation of gear two drives the rotation of gear three. The fixing rod five, the bundle tube three and the fixing rod six serve to support gear three.

[0021] In a preferred embodiment, a set of fixing rods seven is provided at the center of the bottom of the purification box. The bottom of the fixing rods seven is connected and fixed to the bottom of the purification box. A limiting block two is provided at the top of the fixing rods seven. The limiting block two has a convex structure. A driven plate is provided above the limiting block two. A through hole is opened in the center of the driven plate. A bearing is fixed inside the through hole. The bearing model is UC205 ceramic bearing. The driven plate is placed on top of the limiting block two. The protruding part of the limiting block two is inserted into the inner ring of the bearing in the center of the driven plate.

[0022] A set of gear rings two is located at the top of the driven disc away from the center. The left edge of gear ring two meshes with the bottom of gear three. A rotating shaft two is located at the top of the driven disc. The bottom of rotating shaft two is connected and fixed to the top of the driven disc. In actual use, fixing rod seven serves to support the driven disc and rotating shaft two. Limiting block two restricts the position of the driven disc so that it does not contact the bottom of the purification box. The rotation of gear three drives gear ring two to rotate, thereby driving the driven disc to rotate, causing the rotating shaft two connected and fixed to the top of the driven disc to rotate.

[0023] In a preferred embodiment, a filter box is provided above the second rotating shaft, and the filter box is filled with sodium hydroxide solution. The back of the filter box is welded to the rear side of the inside of the purification box. The top of the second rotating shaft extends into the inside of the filter box. A sealing ring is provided at the junction of the second rotating shaft and the bottom of the filter box. The sealing ring is an HC0066 fluororubber O-ring. Several sets of stirring blades are fixedly connected to the top of the second rotating shaft. The stirring blades are made of 304 stainless steel. A second cold mixed hydrogen inlet is provided on the upper left side inside the filter box. The lowest point of the second cold mixed hydrogen inlet is higher than the interface of the sodium hydroxide solution.

[0024] A through-hole is located on the top right side of the filter box, and a pipe made of 304 stainless steel is connected above the through-hole. The top of the pipe is connected to the cold purified hydrogen output port on the top of the purification box. A through-hole is located on the lower right side of the filter box, and a pipe made of 304 stainless steel is connected to the right side of the through-hole. A stop valve is located at the top of the pipe, and the right side of the pipe is connected to the second drain port on the right side of the purification box. In actual use, the rotation of the second rotating shaft drives the stirring blades to rotate. The stirring blades rotate in the sodium hydroxide solution, which allows the sodium hydroxide solution to fully contact the cold mixed hydrogen gas, accelerating the reaction rate and thus speeding up the hydrogen purification process.

[0025] In a preferred embodiment, flange one has a concave structure. Inside the protruding part of the concave structure of flange one, four sets of identical accommodating cavities one are provided at equal intervals around the center of the flange. The accommodating cavity one has an arc-shaped structure. Inside the accommodating cavity one, several sets of springs one are provided. The bottom of the springs one is connected and fixed to the bottom of the accommodating cavity one. Inside the flat part of the concave structure of flange one, four sets of identical accommodating cavities two are provided at equal angles around the center of the flange. Inside the accommodating cavity two, springs two are provided. The bottom of the springs two is connected and fixed to the bottom of the accommodating cavity two. Outside the accommodating cavity two, four sets of identical connecting rods three are provided. The bottom of the connecting rods three extends into the accommodating cavity two and into the center of the springs two. The top of the springs two is connected and fixed to the rod body of the connecting rods three.

[0026] The top of the connecting rod three is fixed with a retaining strip. The retaining strip has four sets of identical shapes, sizes and structures. The retaining strip is bent at a 90-degree angle to the connecting rod three. The bottom of the retaining strip is fixed to the top of the spring one. The radius of the retaining strip one is smaller than the radius of the receiving groove one. In actual use, when the retaining strip is squeezed by external force, the retaining strip compresses the spring one, causing the spring one to contract into the receiving cavity one, thereby moving the retaining strip one into the receiving cavity one. At the same time, when the retaining strip moves into the receiving cavity one, the retaining strip pulls the connecting rod three, pulling the bottom of the connecting rod three outward from the receiving cavity two. During the pulling process, the spring two extends outward. When the force squeezing the retaining strip disappears, the spring two pulls the connecting rod three to reset it, and the spring one extends outward to push out the retaining strip, thereby achieving the effect of compressing and resetting the retaining strip.

[0027] In a preferred embodiment, four sets of identical grooves of the same shape, size, and structure are equidistantly arranged inside the flange body away from the center. The grooves are arc-shaped, with a radius longer than the radius of the retaining strip. The outer radius of flange two is shorter than the inner radius of the concave structure of flange one. A sealing ring, a V220 rubber sealing ring, is provided between flange one and flange two. Flange one and flange two are connected and fixed by several sets of bolts. Flange two is embedded inside the concave structure of flange one, so that the grooves and retaining strips fit together, thereby achieving the effect of fixing flange one, sealing ring, and flange two.

[0028] After adopting the above technical solution, the beneficial effects of the present invention are as follows: By setting an active disk, a gear ring, a connecting rod, and a brush, the active disk rotates, driving the gear ring to rotate, which in turn drives the brush to clean the cold mixed hydrogen output port through the connecting rod. By setting a gear, a rotating shaft, a gear, a gear, a driven disk, a rotating shaft, and stirring blades, the gear rotates, which in turn drives the gear, which in turn drives the gear, which in turn drives the driven disk, which in turn drives the rotating shaft, causing the stirring blades to rotate and accelerate the removal of impurities from the hydrogen. By setting a flange, a sealing ring, and a flange, the flange and flange are fixed together by a locking strip and a slot, and then tightened with bolts, thus fixing the flange and flange and the sealing ring together and preventing gas leakage. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a heat exchanger that is easy to maintain according to the present invention.

[0031] Figure 2 This is a schematic diagram of a heat exchanger structure that is easy to maintain according to the present invention.

[0032] Figure 3 This is a schematic diagram of the structure of a heat exchanger with easy maintenance according to the present invention, including an active disc, a brush, and a gear.

[0033] Figure 4 This is a schematic diagram of a heat exchanger blade and gear ring that are easy to maintain according to the present invention.

[0034] Figure 5 This is a top view of the active plate, brush one, and brush two of a heat exchanger that is easy to maintain according to the present invention.

[0035] Figure 6 This is a left view of a heat exchanger bundle tube that is easy to maintain according to the present invention.

[0036] Figure 7 This is a schematic diagram of the internal structure of a heat exchanger purification box that is easy to maintain according to the present invention.

[0037] Figure 8 This is a schematic diagram of a heat exchanger splitter structure that is easy to maintain according to the present invention.

[0038] Figure 9 This is a schematic diagram of a three-phase gear structure for a heat exchanger that is easy to maintain according to the present invention.

[0039] Figure 10 This is a top view of the driven plate of a heat exchanger that is easy to maintain according to the present invention.

[0040] Figure 11 This is a schematic diagram of flange one and flange two of a heat exchanger that are easy to maintain according to the present invention.

[0041] Figure 12 This is a schematic diagram of the internal structure of a heat exchanger flange that is easy to maintain according to the present invention.

[0042] Figure 13 This is a schematic diagram of a heat exchanger chute that is easy to maintain according to the present invention.

[0043] In the diagram, 100 is the mixed hydrogen tube side cylinder, 110 is the raw material shell side cylinder, 120 is the safety valve interface, 130 is the pressure gauge interface, 140 is the cold mixed hydrogen outlet, 150 is the raw material inlet, 160 is the magnetic level gauge interface, 170 is the preheated raw material outlet, 180 is the raw material discharge outlet, 190 is the hot mixed hydrogen inlet, 200 is the first drain outlet, 210 is the first cold mixed hydrogen inlet, 220 is the purification tank, and 230 is the cold 240-Purified hydrogen output port, 250-Drain outlet II, 260-Drain pipe, 270-Fixing rod I, 280-Fixing rod II, 290-Fixing block, 300-Fixing rod III, 310-Active disc, 320-Limiting block I, 330-Connecting rod I, 340-Brush I, 350-Connecting rod II, 360-Brush II, 370-Slider I, 380-Slider II, 390-Groove, 400-Airflow inlet, 4 10-Gear I, 420-Rotating Shaft I, 430-Jump Tube II, 440-Fixing Rod IV, 450-Fan Blade, 460-Gear Ring I, 470-Flange I, 480-Flange II, 490-Sealing Ring, 500-Bolt, 510-Diverter, 520-Shaft Hole, 530-Gear II, 540-Gear III, 550-Fixing Rod V, 560-Jump Tube III, 570-Fixing Rod VI, 580-Driven Disc, 590 - Gear ring II, 600- Fixing rod VII, 610- Limiting block II, 620- Rotating shaft II, 630- Stirring blade, 640- Filter box, 650- Cold mixed hydrogen inlet II, 660- Front baffle, 670- Rear baffle, 680- Fixing rod VIII, 690- Diverter hole, 700- Connecting rod III, 710- Locking strip, 720- Receiving cavity I, 730- Spring I, 740- Receiving cavity II, 750- Spring II, 760- Locking groove. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only one aspect of the present invention, and not the entirety of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figures 1-13A heat exchanger that is easy to maintain includes: a mixing hydrogen tube side cylinder 100, a raw material shell side cylinder 110, and a purification box 220. The raw material shell side cylinder 110 is welded to the outside of the mixing hydrogen tube side cylinder 100. A fixing block 290 is provided below the top of the mixing hydrogen tube side cylinder 100. The fixing block 290 has a hollow structure and several small through holes are opened at the bottom of the fixing block 290. A fixing rod 300 is provided below the fixing rod 300. An active plate 310 is provided below the fixing rod 300. A through hole is provided in the center of the active plate 310. A bearing is connected and fixed inside the through hole. The bearing is a UC205 ceramic bearing. A limiting block 320 is provided below the active plate 310. The lower part of the fixing rod 300 passes through the lower part of the inner ring of the bearing in the center of the active plate 310 and is connected and fixed to the top of the limiting block 320.

[0046] A set of connecting rods 330 is located on the lower left side of the active disk 310, and a set of connecting rods 350 is located on the lower right side of the active disk 310. Connecting rods 330 and 350 are identical in shape, size, and structure, and are L-shaped. The tops of connecting rods 330 and 350 are respectively connected and fixed to the lower left and right sides of the active disk 310. A brush 340 is located on the lower left side of connecting rod 330, and a slider 370 is located below brush 340. Connecting rods 330... Below the left side of 50, there is a second brush 360. Below the second brush 360, there is a second slider 380. Below the first slider 370 and the second slider 380, there is a circular groove 390. The groove 390 is opened on the upper surface of a set of circular baffles away from the center. The bottom center of the circular baffle is recessed inward to form a set of airflow inlets 400. The airflow inlets 400 have a structure in which the aperture gradually decreases from bottom to top. The bristles of the first brush 340 and the second brush 360 are in contact with the inner wall of the mixing hydrogen tube cylinder 100 respectively.

[0047] A set of gear ring 460 is located at the bottom of the active disk 310 away from the center. Several sets of fan blades 450 are located inside the gear ring 460. A set of gear 410 is located on the right side below the gear ring 460. The top of gear 410 meshes with the right side below the gear ring 460. A rotating shaft 420 is located on the right side of gear 410. A bundle tube 430 is located outside the part of the rotating shaft 420 inside the mixing hydrogen tube cylinder 100. Through holes are opened on the left and right sides of the bundle tube 430. Bearings of type UC205 ceramic bearings are fixedly connected inside the through holes. The rotating shaft 420 is placed inside the inner ring of the bearing inside the bundle tube 430. A fixing rod 440 is located at the top of the bundle tube 430. The top of the fixing rod 440 is fixed to the inner side of the top of the mixing hydrogen tube cylinder 100, and the bottom of the fixing rod 440 is connected and fixed to the top of the bundle tube 430.

[0048] Please see Figure 1 and Figure 2The top of the mixed hydrogen tube cylinder 100 is provided with a safety valve interface 120. The left side below the safety valve interface 120 is provided with a pressure gauge interface 130. The right side of the pressure gauge interface 130 is provided with a cold mixed hydrogen outlet 140. The top of the raw material shell cylinder 110 on the left side below the pressure gauge interface 130 is provided with a raw material inlet 150. The right side of the raw material shell cylinder 110 on the right side below the cold mixed hydrogen outlet 140 is provided with two sets of identical magnetic float level gauge interfaces 160. The bottom of the raw material shell cylinder 110 below the magnetic float level gauge interface 160 is provided with a raw material discharge port 180. The raw material discharge port 180 is symmetrically provided with a preheated raw material outlet 170 around the central axis of the raw material shell cylinder 110. The side of the mixed hydrogen tube cylinder 100 below the preheated raw material outlet 170 is provided with a hot mixed hydrogen inlet 190.

[0049] The bottom of the mixed hydrogen tube-side cylinder 100 below the hot mixed hydrogen is equipped with a drain port 200. A mixture of methanol and water is introduced into the raw material shell cylinder 110 through the raw material inlet 150. Hot mixed hydrogen composed of hydrogen and carbon dioxide is introduced into the mixed hydrogen tube-side cylinder 100 through the hot mixed hydrogen inlet 190. The hot mixed hydrogen raw material undergoes heat exchange. After the exchange is completed, the cold mixed hydrogen enters the purification tank 220 through the cold mixed hydrogen outlet 140. The heated methanol and water mixture is discharged from the preheated raw material outlet 170. A magnetic float level gauge is connected to the right side of the magnetic float level gauge interface 160 to facilitate the observation of the raw material injection status inside the raw material shell cylinder 110. The drain port 200 is used to discharge wastewater, and the raw material discharge port 180 is used to discharge the remaining raw material. The safety valve interface 120 is connected to the safety valve to control the air pressure, and the pressure gauge interface 130 is connected to the pressure gauge to monitor pressure changes and make timely adjustments.

[0050] Please see Figure 1 and Figure 2 A flange 470 is located on the right side of the cold mixed hydrogen outlet 140. A flange 480 is located on the right side of the flange 470. A cold mixed hydrogen inlet 210 is located on the right side of the flange 480. A purification box 220 is located on the right side of the cold mixed hydrogen inlet 210. A set of fixing rods 280 with the same shape, size and structure are located at the upper and lower positions on the left side of the purification box 220. The left side of the fixing rods 280 is welded to the upper right side of the mixed hydrogen pipe cylinder 100. The right side of the fixing rods 280 is welded to the left side of the purification box 220. A cold purified hydrogen outlet 230 is located on the top right side of the purification box 220.

[0051] A second drain outlet 240 is located on the lower right side of the purification box 220. A drain pipe 250 is connected to the right side of the second drain outlet 240. A first bundle pipe 270 is located below the drain pipe 250. A set of fixing rods 260 is located on the left side of the first bundle pipe 270. The left side of the fixing rods 260 is welded to the side of the raw material shell cylinder 110, and the right side of the fixing rods 260 is welded to the left side of the first bundle pipe 270. The right end of the drain pipe 250 is bent downward at 90 degrees, passes through the first bundle pipe 270, and extends below the first bundle pipe 270. The lower end of the drain pipe 250 is bent to the left at 90 degrees and connects to the first drain outlet 200. The second fixing rod 280 serves to fix the purification box 220. The drain pipe 250 serves to merge the sewage inside the first drain outlet 200 and the second drain outlet 240. The fixing rods 260 and the first bundle pipe 270 serve to fix the drain pipe 250.

[0052] Please see Figure 2 , Figure 7 and Figure 8 A diverter 510 is provided on the outer side of the left opening of the purification box 220. The diverter 510 consists of a front baffle 660, a rear baffle 670 and several sets of fixing rods 680 with the same shape, size and structure. The left side of the fixing rods 680 is connected and fixed to the right side of the rear baffle 670, and the right side of the fixing rods 680 is connected and fixed to the left side of the front baffle 660. Several diverter holes 690 are opened on the right side of the front baffle 660. A set of shaft holes 520 is opened in the center of the right side of the front baffle 660. The through holes penetrate the left and right sides of the front baffle 660.

[0053] The left and right sides of the rear baffle 670 are through structures. The right side of the rotating shaft 420 passes through the cold mixed hydrogen outlet 140. The right end of the rotating shaft 420 passes through the shaft hole 520 in the center of the front baffle 660 of the distributor 510 and extends out of the right side of the distributor 510. The right end of the rotating shaft 420 is connected and fixed with the gear 530. In actual use, the distributor 510 facilitates the diversion of the cold mixed hydrogen gas entering the purification box 220, so that the gas flow rate is not too large and the gas pressure inside the purification box 220 is too high, which would affect the input of cold mixed hydrogen into the purification box 220. The distributor 510 can also support the rotating shaft 420.

[0054] Please see Figure 7 Below gear 2 530 is gear 3 540. The top of gear 3 540 meshes with the bottom of gear 2 530. A through hole is opened in the center of gear 3 540. A bearing is installed inside the through hole. The bearing is a UC205 ceramic bearing. A set of fixing rod 550 is provided on the left side of gear 3 540. The left side of fixing rod 550 is connected and fixed to the left side of the purification box 220.

[0055] The right side of the fixing rod 550 is placed inside the bearing inner ring inside the through hole of the gear 3 540. Limiting mechanisms are provided at the left and right positions of the connection between the fixing rod 550 and the gear 3 540. A bundle tube 3 560 is provided outside the fixing rod 550. The fixing rod 6 570 is fixedly connected to the bottom of the bundle tube 3 560. The bottom of the fixing rod 6 570 is fixedly connected to the bottom of the purification box 220. The top of the fixing rod 6 570 is fixed to the bottom of the bundle tube 3 560. The gear 2 530 meshes with the gear 3 540, so that when the gear 2 530 rotates, it drives the gear 3 540 to rotate. The fixing rod 550, the bundle tube 3 560 and the fixing rod 6 570 serve to support the gear 3 540.

[0056] Please see Figure 2 , Figure 6 , Figure 8 , Figure 9 and Figure 10 A set of fixing rods 600 is provided at the bottom center of the purification box 220. The bottom of fixing block 290 is connected and fixed to the bottom of the purification box 220. A limiting block 610 is provided at the top of the fixing rods 600. The limiting block 610 has a convex structure. A driven plate 580 is provided above the limiting block 610. A through hole is opened in the center of the driven plate 580. A bearing is fixed inside the through hole. The bearing model is UC205 ceramic bearing. The driven plate 580 is placed on top of the limiting block 610. The protruding part of the limiting block 610 is inserted into the inner ring of the bearing in the center of the driven plate 580.

[0057] A set of gear rings 2 590 is provided at the top of the driven disk 580 away from the center. The left edge of gear rings 2 590 meshes with the bottom of gear 3 540. A rotating shaft 2 620 is provided at the top of the driven disk 580. The bottom of rotating shaft 2 620 is connected and fixed to the top of the driven disk 580. In actual use, fixing rod 7 600 plays the role of supporting the driven disk 580 and rotating shaft 2 620. Limiting block 2 610 restricts the position of the driven disk 580 so that it does not contact the bottom of the purification box 220. The rotation of gear 3 540 drives gear rings 2 590 to rotate, thereby driving the driven disk 580 to rotate, causing the rotating shaft 2 620 connected and fixed at the top of the driven disk 580 to rotate.

[0058] Please see Figure 1 , Figure 2 and Figure 7A filter box 640 is located above the rotating shaft 620. The filter box 640 is filled with sodium hydroxide solution. The back of the filter box 640 is welded to the rear side of the purification box 220. The top of the rotating shaft 620 extends into the filter box 640. A sealing ring 490 is provided at the junction of the rotating shaft 620 and the bottom of the filter box 640. The sealing ring 490 is an HC0066 fluororubber O-ring. Several sets of stirring blades 630 are fixedly connected to the top of the rotating shaft 620. The stirring blades 630 are made of 304 stainless steel. A cold mixed hydrogen inlet 650 is located on the upper left side of the filter box 640. The lowest point of the cold mixed hydrogen inlet 650 is higher than the interface of the sodium hydroxide solution.

[0059] A through hole is provided on the top right side of the filter box 640, and a pipe is connected above the through hole. The pipe is made of 304 stainless steel. The top of the pipe is connected to the cold purified hydrogen output port 230 on the top of the purification box. A through hole is provided on the lower right side of the filter box 640, and a pipe is connected to the right side of the through hole. The pipe is also made of 304 stainless steel. A water stop valve is provided at the top of the pipe. The right side of the pipe is connected to the drain port 240 on the right side of the purification box 220. In actual use, the rotating shaft 620 rotates, which drives the stirring blade 630 to rotate. The stirring blade 630 rotates in the sodium hydroxide solution, which makes the sodium hydroxide solution and the cold mixed hydrogen gas fully contact each other to accelerate the reaction rate, thereby speeding up the hydrogen purification process.

[0060] Please see Figure 11 and Figure 12 Flange 1 470 has a concave structure. Inside the protruding part of the concave structure of flange 1 470, there are four sets of identical accommodating cavities 1 720 equidistantly arranged around the center of the flange. Accommodating cavities 1 720 have an arc-shaped structure. Inside each accommodating cavity 1 720, there are several sets of springs 1 730. The bottom of each spring 1 730 is connected and fixed to the bottom of the accommodating cavity 1 720. Inside the flat part of the concave structure of flange 1 470, there are four sets of identical accommodating cavities 2 740 equidistantly arranged around the center of the flange. Inside each accommodating cavity 2 740, there are springs 2 750. The bottom of each spring 2 750 is connected and fixed to the bottom of the accommodating cavity 2 740. Outside each accommodating cavity 2 740, there are four sets of identical connecting rods 3 700. The bottom of each connecting rod 3 700 extends into the accommodating cavity 2 740 and into the center of the spring 2 750. The top of each spring 2 750 is connected and fixed to the body of the connecting rod 3 700.

[0061] A retaining strip 710 is fixedly connected to the top of the connecting rod 3 700. The retaining strip 710 has four sets of identical shapes, sizes, and structures. The retaining strip 710 is bent at a 90-degree angle to the connecting rod 3 700. The bottom of the retaining strip 710 is fixedly connected to the top of the spring 1 730. The radius of the retaining strip 710 is smaller than the radius of the receiving groove. In actual use, when the retaining strip 710 is subjected to external force, it compresses the spring 1 730, causing the spring 1 730 to contract into the receiving cavity 1 720, thereby locking... As the retaining bar 710 moves into the receiving cavity 720, the retaining bar 710 pulls the connecting rod 3 700, causing the bottom of the connecting rod 3 700 to be pulled outward from inside the receiving cavity 740. During the pulling process, the spring 2 750 extends outward. When the force squeezing the retaining bar 710 disappears, the spring 2 750 pulls the connecting rod 3 700 to reset it, and the spring 1 730 extends outward to push out the retaining bar 710, thereby achieving the effect of compressing and resetting the retaining bar 710.

[0062] Please see Figure 13 Flange 2 480 has four sets of identical slots 760 at equal intervals on its inner surface, away from the center. The slots 760 are arc-shaped, and their radius is greater than that of the retaining strip 710. The outer radius of flange 2 480 is less than the inner radius of the concave structure of flange 1 470. A sealing ring 490, a V220 rubber sealing ring, is provided between flange 1 470 and flange 2 480. Flange 1 470 and flange 2 480 are connected and fixed by several sets of bolts 500. Flange 2 480 is embedded in the concave structure of flange 1 470, so that the slots 760 and retaining strips 710 fit together, thereby achieving the effect of fixing flange 1 470, sealing ring 490, and flange 2 480.

[0063] As an embodiment of the present invention: During the process of methanol reforming to produce hydrogen using a heat exchanger, prolonged use of the heat exchanger will cause dirt to accumulate around the cold mixed hydrogen output port 140. If not maintained in time, the dirt will block the cold mixed hydrogen output port 140, resulting in obstructed output of cold mixed hydrogen, affecting the progress of hydrogen production. Furthermore, the corrosive mixed hydrogen gas will exacerbate the corrosion of the mixed hydrogen tube body 100, which is not conducive to machine maintenance and long-term use. In addition, if the cold mixed hydrogen output port 140 is not properly sealed, it will lead to leakage of corrosive gas, posing a threat to the health of operators. Thirdly, the products of the methanol-water hydrogen production process include hydrogen and carbon dioxide. If not preliminarily purified, the output mixed hydrogen will contain a large number of impurities, and further purification will require more manpower and resources.

[0064] Please see Figure 11 , Figure 12To solve the above problems, in actual use, firstly, flange 2 480 is connected to flange 1 470, and flange 2 480 is inserted into the groove of the concave structure of flange 1 470. During this process, the outer side of flange 2 480 presses against the four sets of retaining strips 710 on the inner side of the protruding part of the concave structure of flange 1 470. The retaining strips 710 are pressed into the receiving cavity 1 720 by the pressing force. The spring 1 730 inside the receiving cavity 1 720 is compressed inward by the pressing force, causing the retaining strips 710 to move into the receiving cavity 1 720. At the same time, when the retaining strips 710 move into the receiving cavity 1 720 by the pressing force, they pull the connecting rod 3 700 to move. When the connecting rod 3 700 moves, the bottom of the connecting rod 3 700 moves outward from the receiving cavity 2 740, thereby pulling the spring 2 750 to perform an extension and stretching movement.

[0065] Please see Figure 11 , Figure 12 and Figure 13 When the slot 760 moves below the clip 710, the second spring 750 pulls the third connecting rod 700, which in turn pulls the clip 710 from inside the receiving cavity 720 into the slot 760, thereby fixing the first flange 470 and the second flange 480. Then, the bolts 500 are used to fix the first flange 470, the second flange 480 and the sealing ring 490 together, which plays a double fixing role and prevents the leakage of corrosive gases.

[0066] Please see Figure 1 and Figure 2 As another embodiment of the present invention: based on the further explanation of the above embodiments, the mixed raw material of methanol and water enters the raw material shell cylinder 110 from the raw material inlet 150, while the hot mixed hydrogen gas enters the mixed hydrogen tube cylinder 100 through the hot mixed hydrogen inlet 190. The raw material absorbs the heat of the mixed hydrogen to achieve a preheating effect, and the heat of the hot mixed hydrogen is absorbed and the temperature is reduced to meet the output requirements.

[0067] Please see Figure 2 and Figure 3 As the mixed hydrogen gas moves upward, it passes through the airflow inlet 400. Since the airflow inlet 400 has a structure where the aperture gradually decreases from bottom to top, the volume of the hot mixed hydrogen gas gradually decreases as it passes through the airflow inlet 400. This results in a decrease in the internal pressure of the space above the airflow inlet 400, and an increase in the flow rate of the hot mixed hydrogen entering the airflow inlet 400. The hot mixed hydrogen then quickly passes through the surface of the fan blades 450 of the active disk 310. The fan blades 450 rotate under the blowing of the airflow, thereby driving the active disk 310 to rotate around the fixed rod 300 above the limiting block 320.

[0068] Please see Figure 3 , Figure 4 and Figure 5The fixing block 290 at the top of the fixing rod 280 has a hollow structure, so it will not affect the smoothness of the safety valve interface 120. The rotation of the active disc 310 causes the connecting rod 1 330 and the connecting rod 2 350 to rotate. The rotation of the connecting rod 1 330 drives the brush 1 340 to rotate. The rotation of the brush 1 340 causes the slider 1 370 at the bottom of the brush 1 340 to slide in the groove 390, thereby making the brush 1 340 more stable when brushing the inner wall of the mixed hydrogen tube cylinder 100.

[0069] The rotation of connecting rod 2 350 drives the rotation of brush 2 360. The rotation of brush 2 360 causes slider 2 380 to slide within the groove 390, thereby making brush 2 360 more stable when brushing the inner wall of the mixed hydrogen tube cylinder 100. This helps to maintain the inner wall of the mixed hydrogen tube cylinder 100 and prevent impurities from clogging the cold mixed hydrogen outlet 140, thus affecting the output progress.

[0070] Please see Figure 3 and Figure 6 As a third embodiment of the present invention: based on the further explanation of the above embodiments, when the drive disk 310 rotates, the gear ring 460 meshes with the top teeth of the gear 410, thereby the drive disk 310 rotates and drives the gear 410 to rotate, the gear 410 rotates and drives the rotating shaft 420 to rotate, the rotating shaft 420 is provided with a bundle tube 430 on the outside, and a bearing is provided inside the bundle tube 430, so the bundle tube 430 will not hinder the rotation of the rotating shaft 420;

[0071] The upper part of the bundle tube 2 430 is connected and fixed to the fixing rod 440, so that the rotation of the rotating shaft 1 420 and the gear 1 410 is more stable;

[0072] Please see Figure 6 , Figure 7 and Figure 9 A diverter 510 is provided at the left opening inside the purification chamber 220. The diverter 510 can divert the cold mixed hydrogen entering the purification chamber 220. The right side of the rotating shaft 420 is connected and fixed to the gear 530. The center of the front baffle 660 is provided with a shaft hole 520, which facilitates the placement of the rotating shaft 420 inside it for support. The through holes on the surface of the front baffle 660 divert the mixed hydrogen gas, so that the purification chamber 220 is not flooded with excessive gas at one moment, which would increase the gas pressure inside the purification chamber 220 and affect the entry of the cold mixed hydrogen gas. The right side of the rotating shaft 420 is placed in the shaft hole 520, and the gear 530 is connected and fixed to the right side of the rotating shaft 420. Therefore, the rotation of the rotating shaft 420 drives the rotation of the gear 530.

[0073] Please see Figure 7 , Figure 9 and Figure 10Gear 3 540 is located below gear 2 530. Gear 2 530 and gear 3 540 mesh with each other. Gear 3 540 is fixed by fixing rod 5 550 and bundle tube 3 560. Fixing rod 5 550 is fixedly connected to the bearing inside gear 3 540. So when gear 2 530 rotates, it drives gear 3 540 to rotate around fixing rod 5 550. The bottom of gear 3 540 meshes with the top left side of gear ring 2 590. Gear ring 2 590 is located on the top of driven disk 580. Gear 3 540 drives gear ring 2 590 to rotate, so that driven disk 580 rotates around fixing rod 7 600 above limit block 2 610.

[0074] Please see Figure 7 and Figure 10 A rotating shaft 620 is fixedly connected to the top of the driven disk 580. The top of the rotating shaft 620 extends into the filter box 640. The top of the rotating shaft 620 is equipped with stirring blades 630. Therefore, the rotation of the driven disk 580 drives the rotating shaft 620 to rotate, thereby causing the stirring blades 630 to stir the sodium hydroxide solution inside the filter box 640. This accelerates the reaction between the sodium hydroxide solution and carbon dioxide in the mixed hydrogen gas, thus accelerating the absorption of carbon dioxide and purifying the hydrogen gas.

[0075] Please see Figure 2 , Figure 3 and Figure 7 When sodium hydroxide reacts with carbon dioxide, carbon dioxide is absorbed. Sufficient sodium hydroxide solution reacts with carbon dioxide to produce sodium carbonate and water. During this process, the amount of carbon dioxide decreases, resulting in a decrease in the internal pressure of the filter box 640. The gas flows faster from the high-pressure area to the low-pressure area, thereby further accelerating the flow rate of the cold mixed hydrogen gas. This feedback is sent to the active disc 310, causing the active disc 310 to rotate faster, which in turn increases the stirring speed of the stirring blade 630. The reaction rate of sodium hydroxide with carbon dioxide is accelerated, and the efficiency of hydrogen purification is increased. This achieves the effect of purifying hydrogen and accelerating the reaction process, thereby reducing the corrosion time inside the heat exchanger and maintaining the heat exchanger's effectiveness.

[0076] Please see Figure 1 After heat exchange, the purified hydrogen is output through the cold purified hydrogen output port 230. The waste material is discharged through the second drain port 240 and the drain pipe 250, and finally merges with the first drain port 200. The drain pipe 250 is supported by the first bundle pipe 270 and the first fixing rod 260 to stabilize the structure. The preheated methanol and water raw materials are output from the preheated raw material output port 170. The unused raw materials are discharged from the raw material discharge port 180. The magnetic float level gauge interface 160 is connected to the magnetic float level gauge to facilitate the observation of the feeding situation inside the raw material shell cylinder 110.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat exchanger that is easy to maintain, comprising: The mixed hydrogen tube cylinder (100), the raw material shell cylinder (110), and the purification box (220) are characterized in that: the raw material shell cylinder (110) is welded to the outside of the mixed hydrogen tube cylinder (100), a fixing block (290) is provided below the top of the mixed hydrogen tube cylinder (100), the fixing block (290) is a hollow structure, a number of small through holes are opened at the bottom of the fixing block (290), a fixing rod three (300) is provided below the fixing block (290), an active disk (310) is provided below the fixing rod three (300), a through hole is provided in the center of the active disk (310), a bearing is connected and fixed inside the through hole, the bearing model is UC205 ceramic bearing, a limiting block one (320) is provided below the active disk (310), and the fixing rod three (300) passes through the lower part of the inner ring of the bearing in the center of the active disk (310) and is connected and fixed to the top of the limiting block one (320); A set of connecting rods 1 (330) is provided on the lower left side of the active disk (310), and a set of connecting rods 2 (350) is provided on the lower right side of the active disk (310). The connecting rods 1 (330) and 2 (350) are identical in shape, size, and structure. The connecting rods 1 (330) and 2 (350) are L-shaped. The tops of the connecting rods 1 (330) and 2 (350) are respectively connected and fixed to the lower left and right sides of the active disk (310). A brush 1 (340) is provided on the lower left side of the connecting rod 1 (330), and a slider 1 (370) is provided below the brush 1 (340). Below the second connecting rod (350), there is a second brush (360) on the left side. Below the second brush (360), there is a second slider (380). Below the first slider (370) and the second slider (380), there is a circular groove (390). The groove (390) is opened on the upper surface of a set of circular baffles away from the center. The bottom center of the circular baffle is recessed inward to form a set of airflow inlets (400). The airflow inlets (400) have a structure in which the aperture gradually decreases from bottom to top. The bristles of the first brush (340) and the second brush (360) respectively contact the inner wall of the mixing hydrogen tube cylinder (100). The bottom of the active disk (310) is provided with a set of gear rings (460) away from the center. Several sets of fan blades (450) are provided inside the gear rings (460). A set of gears (410) is provided on the lower right side of the gear rings (460). The top of the gears (410) meshes with the lower right side of the gear rings (460). A rotating shaft (420) is provided on the right side of the gears (410). A bundle tube (2) is provided outside the part of the rotating shaft (420) inside the mixing hydrogen tube cylinder (100). 430), the two bundle tubes (430) are provided with through holes on the left and right sides, and bearings are fixedly connected inside the through holes. The bearings are UC205 ceramic bearings. The rotating shaft (420) is placed inside the bearing inner ring provided inside the two bundle tubes (430). The top of the two bundle tubes (430) is provided with a fixing rod (440). The top of the fixing rod (440) is fixed to the inner side of the top of the mixed hydrogen tube cylinder (100). The bottom of the fixing rod (440) is connected and fixed to the top of the two bundle tubes (430). The top of the mixed hydrogen tube cylinder (100) is provided with a safety valve interface (120), the left side below the safety valve interface (120) is provided with a pressure gauge interface (130), and the right side of the pressure gauge interface (130) is provided with a cold mixed hydrogen output port (140). The cold mixed hydrogen outlet (140) is provided with flange one (470) on the right side, and flange two (480) is provided on the right side of flange one (470). A sealing ring (490) is provided between flange one (470) and flange two (480). The sealing ring (490) is a V220 rubber sealing ring. Flange one (470) and flange two (480) are connected and fixed by several sets of bolts (500).

2. The heat exchanger with convenient maintenance as described in claim 1, characterized in that: The top of the raw material shell cylinder (110) on the left side below the pressure gauge interface (130) is provided with a raw material inlet (150), and two identical magnetic float level gauge interfaces (160) are provided on the upper and lower sides of the raw material shell cylinder (110) on the right side below the cold mixed hydrogen outlet (140). The bottom of the raw material shell cylinder (110) below the magnetic float level gauge interface (160) is provided with a raw material discharge port (180). The raw material discharge port (180) is provided with a preheated raw material output port (170) symmetrically positioned with respect to the central axis of the raw material shell cylinder (110). The side of the mixed hydrogen tube cylinder (100) below the preheated raw material output port (170) is provided with a hot mixed hydrogen inlet (190). The bottom of the mixed hydrogen tube cylinder (100) below the hot mixed hydrogen inlet (190) is provided with a drain port (200).

3. A heat exchanger that is easy to maintain as described in claim 2, characterized in that: The flange 2 (480) is provided with a cold mixed hydrogen inlet 1 (210) on the right side. The cold mixed hydrogen inlet 1 (210) is provided with a purification box (220) on the right side. The purification box (220) is provided with a set of fixed rods 2 (280) of the same shape, size and structure at the upper and lower positions on the left side. The left side of the fixed rods 2 (280) is welded to the upper right side of the mixed hydrogen tube cylinder (100). The right side of the fixed rods 2 (280) is welded to the left side of the purification box (220). The purification box (220) is provided with a cold purified hydrogen outlet (230) on the top right side. The purification box (220) is provided with a second drain outlet (240) on the lower right side. A drain pipe (250) is connected to the right side of the second drain outlet (240). A first bundle pipe (270) is provided below the drain pipe (250). A set of fixing rods (260) is provided on the left side of the first bundle pipe (270). The left side of the first fixing rod (260) is welded to the side of the raw material shell cylinder (110). The right side of the first fixing rod (260) is welded to the left side of the first bundle pipe (270). The right end of the drain pipe (250) is bent down 90 degrees and passes through the first bundle pipe (270) and extends below the first bundle pipe (270). The lower end of the drain pipe (250) is bent to the left 90 degrees and connected to the first drain outlet (200).

4. A heat exchanger that is easy to maintain as described in claim 3, characterized in that: A diverter (510) is provided on the outside of the left opening of the purification box (220). The diverter (510) consists of a front baffle (660), a rear baffle (670) and several sets of fixed rods (680) of the same shape, size and structure. The left side of the fixed rods (680) is connected and fixed to the right side of the rear baffle (670), and the right side of the fixed rods (680) is connected and fixed to the left side of the front baffle (660). Several diverter holes (690) are opened on the right side surface of the front baffle (660), and a set of shaft holes (520) is opened in the center of the right side surface of the front baffle (660). The through holes penetrate the left and right sides of the front baffle (660). The left and right sides of the rear baffle (670) are through structures. The right side of the rotating shaft (420) passes through the cold mixed hydrogen outlet (140). The right end of the rotating shaft (420) passes through the shaft hole (520) in the center of the front baffle (660) of the distributor (510) and extends out of the right side of the distributor (510). The right end of the rotating shaft (420) is connected and fixed with the gear (530). In actual use, the distributor (510) facilitates the diversion of the cold mixed hydrogen gas that is input, so that the gas that enters the purification box (220) instantly will not have too large a flow rate, which would cause the gas pressure inside the purification box (220) to be too high, thereby affecting the input of cold mixed hydrogen into the purification box (220). The distributor (510) can also support the rotating shaft (420).

5. A heat exchanger that is easy to maintain as described in claim 4, characterized in that: Below the second gear (530) is a third gear (540), the top of the third gear (540) meshes with the bottom of the second gear (530), a through hole is opened in the center of the third gear (540), and a bearing is installed inside the through hole. The bearing is a UC205 ceramic bearing. A set of fixing rods five (550) is provided on the left side of the third gear (540), and the left side of the fixing rods five (550) is connected and fixed to the left side of the purification box (220). The right side of the fixing rod five (550) is placed inside the bearing inner ring inside the through hole of the gear three (540). The left and right positions of the connection between the fixing rod five (550) and the gear three (540) are provided with limiting mechanisms. The outside of the fixing rod five (550) is provided with a bundle tube three (560). The bottom of the bundle tube three (560) is connected and fixed with a fixing rod six (570). The bottom of the fixing rod six (570) is connected and fixed with the bottom of the purification box (220). The top of the fixing rod six (570) is fixed with the bottom of the bundle tube three (560).

6. A heat exchanger that is easy to maintain as described in claim 5, characterized in that: A set of fixing rods seven (600) is provided at the center of the bottom of the purification box (220). The bottom of the fixing rods seven (600) is connected and fixed to the bottom of the purification box (220). The top of the fixing rods seven (600) is provided with a limiting block two (610). The limiting block two (610) has a convex structure. A driven plate (580) is provided above the limiting block two (610). A through hole is opened in the center of the driven plate (580). A bearing is fixed inside the through hole. The bearing model is UC205 ceramic bearing. The driven plate (580) is placed on top of the limiting block two (610). The protruding part of the limiting block two (610) is inserted into the inner ring of the bearing in the center of the driven plate (580). A set of gear rings 2 (590) is provided at the top of the driven disk (580) away from the center. The left edge of the gear rings 2 (590) meshes with the bottom of gear 3 (540). A rotating shaft 2 (620) is provided at the top of the driven disk (580). The bottom of the rotating shaft 2 (620) is connected and fixed to the top of the driven disk (580). In actual use, the fixing rod 7 (600) plays the role of supporting the driven disk (580) and the rotating shaft 2 (620). The limiting block 2 (610) restricts the position of the driven disk (580) so that it will not contact the bottom of the purification box (220). The rotation of gear 3 (540) drives the gear rings 2 (590) to rotate, thereby driving the driven disk (580) to rotate, so that the rotating shaft 2 (620) connected and fixed at the top of the driven disk (580) rotates.

7. A heat exchanger that is easy to maintain as described in claim 6, characterized in that: A filter box (640) is provided above the second rotating shaft (620). The filter box (640) is filled with sodium hydroxide solution. The back of the filter box (640) is welded to the rear side of the purification box (220). The top of the second rotating shaft (620) extends into the filter box (640). A sealing ring (490) is provided at the junction of the second rotating shaft (620) and the bottom of the filter box (640). The sealing ring (490) is a HC0066 fluororubber O-ring. Several sets of stirring blades (630) are fixedly connected to the top of the second rotating shaft (620). The stirring blades (630) are made of 304 stainless steel. A cold mixed hydrogen inlet (650) is provided on the upper left side of the filter box (640). The lowest point of the cold mixed hydrogen inlet (650) is higher than the interface of the sodium hydroxide solution. The filter box (640) has a through hole on the top right side, and a pipe is connected above the through hole. The pipe is made of 304 stainless steel. The top of the pipe is connected to the cold purified hydrogen output port (230) on the top of the purification box. The filter box (640) has a through hole on the lower right side, and a pipe is connected to the right side of the through hole. The pipe is made of 304 stainless steel. A water stop valve is provided at the top of the pipe. The right side of the pipe is connected to the second drain port (240) on the right side of the purification box (220). In actual use, the rotating shaft (620) rotates and drives the stirring blade (630) to rotate. The stirring blade (630) rotates in the sodium hydroxide solution, so that the sodium hydroxide solution and the cold mixed hydrogen gas are fully in contact to accelerate the reaction rate, thereby speeding up the process of purifying hydrogen.

8. A heat exchanger that is easy to maintain as described in claim 7, characterized in that: The flange (470) has a concave structure. Inside the protruding part of the concave structure of the flange (470), four sets of identical accommodating cavities (720) are equidistantly arranged around the center of the flange. Each accommodating cavity (720) has an arc-shaped structure. Inside each accommodating cavity (720), several sets of springs (730) are provided. The bottom of each spring (730) is connected and fixed to the bottom of the accommodating cavity (720). Inside the planar part of the concave structure of the flange (470), four sets of accommodating cavities are equidistantly arranged around the center of the flange. A second (740) with identical shape, size and structure is provided. A second (750) is provided inside the second (740). The bottom of the second (750) is connected and fixed to the bottom of the second (740). Four sets of connecting rods three (700) with identical shape, size and structure are provided on the outside of the second (740). The bottom of the connecting rods three (700) extends into the second (740) and into the center of the second (750). The top of the second (750) is connected and fixed to the rod body of the connecting rods three (700). The top of the connecting rod three (700) is fixedly connected to a retaining strip (710). The retaining strip (710) has four sets of identical shapes, sizes, and structures. The retaining strip (710) is bent at a 90-degree angle to the connecting rod three (700). The bottom of the retaining strip (710) is fixedly connected to the top of the spring one (730). The radius of the retaining strip (710) is smaller than the radius of the receiving cavity one (720). In actual use, when the retaining strip (710) is squeezed by external force, the retaining strip (710) compresses the spring one (730), causing the spring one (730) to contract into the receiving cavity one (720). This causes the clip (710) to move into the receiving cavity one (720). At the same time, as the clip (710) moves into the receiving cavity one (720), the clip (710) pulls the connecting rod three (700) to pull the bottom of the connecting rod three (700) outward from the receiving cavity two (740). During the pulling process, the spring two (750) extends outward. When the force squeezing the clip (710) disappears, the spring two (750) pulls the connecting rod three (700) to reset it. The spring one (730) extends outward to push out the clip (710), thereby achieving the effect of compression and reset of the clip (710).

9. A heat exchanger that is easy to maintain as described in claim 1, characterized in that: The flange two (480) has four sets of slots (760) of the same shape, size and structure, which are equidistant from the center of the disc body. The slots (760) are arc-shaped and the radius of the slots (760) is greater than the radius of the strip (710). The outer radius of the flange two (480) is less than the inner radius of the concave structure of the flange one (470).

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