Heat exchanger

Abstract

The utility model discloses a heat exchanger, including: tank body, tail gas pipe, water inlet mechanism and reflux mechanism, tank body inside is provided with at least two baffle, a plurality of baffle interval setting, a plurality of baffle and the inner wall cooperation of tank body form heat exchange cavity, and a plurality of heat exchange cavities head -to -tail intercommunication form circuitous heat exchange channel, and the tail end outside of heat exchange channel is provided with exhaust pipe, tail gas pipe passes through tank body along heat exchange channel, water inlet mechanism is used for to tank body input water mist and hydrogen, and reflux mechanism is used for recycling the water body in tank body and reuse. Tail gas is inhaled into to tail gas pipe, transports along heat exchange channel from tail end to head end, and water inlet mechanism inputs water mist and hydrogen to the head end of heat exchange channel, heats after tail gas pipe, forms water vapor, and hydrogen drives water vapor to discharge from exhaust pipe, makes the pressure in tank body keep stable simultaneously, makes the evaporation temperature of water keep stable, improves evaporation capacity, energy -conserving and environment -friendly.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to a heat exchanger. Background Technology

[0002] A key advantage of high-temperature solid oxide electrolysis (SOEC) for hydrogen production is the use of gaseous water, i.e., water vapor. This requires less electricity compared to conventional water electrolysis. Compared to proton exchange membrane electrolysis (PEM) and alkaline water electrolysis (AEC), it produces the same mass of hydrogen with less electricity, demonstrating high energy efficiency and representing an important direction for renewable energy development. Existing common heat exchangers in SOEC environments utilize medium-temperature tail gas to heat and evaporate liquid water. Due to internal system pressure, the evaporation temperature on the cold side exceeds 100°C, and the actual usable lower limit of the hot side temperature also exceeds 100°C. Furthermore, the internal system pressure fluctuates, causing significant changes in the evaporation temperature point and resulting in noticeable fluctuations in the evaporation rate. This directly affects the flow rate of water vapor entering the electrolysis reactor, impacting stability. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a heat exchanger that utilizes the waste heat of exhaust gas to stably produce water vapor, improves the utilization rate of exhaust gas, and saves energy and protects the environment.

[0004] The heat exchanger according to an embodiment of the present invention includes: a tank, an exhaust pipe, a water inlet mechanism, and a reflux mechanism; the tank has at least two baffles inside, and multiple baffles are spaced apart, the multiple baffles cooperate with the inner wall of the tank to form heat exchange chambers, the multiple heat exchange chambers are connected end to end to form a meandering heat exchange channel, and an exhaust pipe is provided on the outer side of the tail end of the heat exchange channel; the exhaust pipe passes through the tank along the heat exchange channel; the water inlet mechanism includes a water inlet component and a hydrogen component, the water outlet of the water inlet component is located at the head end of the heat exchange channel, the water inlet component is used to spray water mist toward the exhaust pipe, and the hydrogen component is used to introduce hydrogen into the head end of the heat exchange channel; the reflux mechanism has an input end connected to the tail end of the heat exchange channel, the input end of the reflux mechanism is located at the bottom of the tank and connected to the head end of the heat exchange channel, and the reflux mechanism is used to return the water and hydrogen in the tank to the head end of the heat exchange channel.

[0005] In some embodiments of this utility model, the reflux mechanism includes a first ejector, a first hydrogen pipe, and a first reflux pipe. The water inlet end of the first reflux pipe is connected to the first end of the heat exchange channel, and the water inlet end of the first reflux pipe is located on the bottom side of the tank. The water outlet ends of the first hydrogen pipe and the first reflux pipe are both connected to the input end of the first ejector, and the output end of the first ejector is connected to the first end of the heat exchange channel.

[0006] In some embodiments of this utility model, the water inlet assembly includes a first water inlet pipe and a second ejector, the hydrogen assembly includes a second hydrogen pipe, the first water inlet pipe and the second hydrogen pipe are connected to the input end of the second ejector, and the output end of the second ejector is connected to the beginning end of the heat exchange channel.

[0007] In some embodiments of this utility model, the water inlet assembly includes a third water inlet pipe and a nozzle, the hydrogen assembly includes a third hydrogen pipe, the nozzle is disposed in the heat exchange channel and located at the beginning of the heat exchange channel, the water outlet end of the third water inlet pipe is connected to the nozzle, and the gas outlet end of the third hydrogen pipe is disposed in the heat exchange channel and located below the nozzle.

[0008] In some embodiments of this utility model, a water collection trough is provided at the bottom of the tank body, the water collection trough is located at the first end of the heat exchange channel, and the water collection trough is connected to the first return pipe.

[0009] In some embodiments of this utility model, the reflux mechanism includes a second reflux pipe, a reflux pump, a third ejector, and a return air pipe. The water inlet of the second reflux pipe is connected to the first end of the heat exchange channel, the water outlet of the second reflux pipe is connected to the input end of the third ejector, the air inlet of the return air pipe is connected to the tail end of the heat exchange channel, the air outlet of the return air pipe is connected to the input end of the reflux pump, the output end of the reflux pump is connected to the input end of the third ejector, and the output end of the third ejector is connected to the first end of the heat exchange channel.

[0010] In some embodiments of this utility model, the exhaust pipe includes an inlet pipe, an outlet pipe, and a heat exchange pipe. The two ends of the heat exchange pipe are respectively connected to the inlet pipe and the outlet pipe. The heat exchange pipe is bent along the heat exchange channel. The inlet pipe is located at the tail end of the heat exchange channel, and the outlet pipe is located at the head end of the heat exchange channel.

[0011] In some embodiments of this utility model, the heat exchange tube includes multiple heat exchange sections, which are connected in sequence and are arranged in a curved manner.

[0012] Compared with the prior art, the heat exchanger of this utility model embodiment has the following advantages: the exhaust gas is introduced into the exhaust pipe and then flows along the exhaust pipe from the tail end to the head end of the heat exchange channel. The water inlet assembly and the hydrogen assembly respectively introduce water mist and hydrogen into the tank from the head end of the heat exchange channel. The water mist is heated by the exhaust pipe to form water vapor, which mixes with the hydrogen. The hydrogen flow carries the water vapor out of the exhaust pipe. At the same time, hydrogen is introduced into the tank to keep the pressure in the tank stable, keep the evaporation temperature of the water stable, increase the evaporation rate, reduce costs, and save energy and protect the environment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a first embodiment of the heat exchanger of this utility model;

[0014] Figure 2 This is a schematic diagram of a second embodiment of the heat exchanger of this utility model;

[0015] Figure 3 This is a schematic diagram of a third embodiment of the heat exchanger of this utility model;

[0016] Figure 4 This is a schematic diagram of a fourth embodiment of the heat exchanger of this utility model.

[0017] Explanation of reference numerals in the attached figures:

[0018] Tank body 100; exhaust pipe 110; baffle 120; heat exchange channel 130; heat exchange chamber 140; water collection tank 150;

[0019] Exhaust pipe 200; Inlet pipe 210; Heat exchange pipe 220; Heat exchange section 221; Outlet pipe 230;

[0020] Water inlet mechanism 300; second hydrogen pipe 311; second ejector 312; first water inlet pipe 313; second water inlet pipe 321; nozzle 322; third hydrogen pipe 323;

[0021] First reflux pipe 411; First hydrogen pipe 412; First ejector 413; Return gas pipe 421; Return gas pump 422; Third ejector 423; Second reflux pipe 424. Detailed Implementation

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0023] like Figure 1As shown, the heat exchanger of this embodiment includes: a tank 100, an exhaust pipe 200, a water inlet mechanism 300, and a reflux mechanism; at least two baffles 120 are provided inside the tank 100, and multiple baffles 120 are spaced apart. The multiple baffles 120 cooperate with the inner wall of the tank 100 to form a heat exchange chamber 140. The multiple heat exchange chambers 140 are connected end to end to form a meandering heat exchange channel 130. An exhaust pipe 110 is provided on the outer side of the tail end of the heat exchange channel 130; the exhaust pipe 200 passes through the tank 100 along the heat exchange channel 130. 00; The water inlet mechanism 300 includes a water inlet component and a hydrogen component. The water outlet of the water inlet component is located at the beginning of the heat exchange channel 130. The water inlet component is used to spray water mist toward the exhaust pipe 200. The hydrogen component is used to introduce hydrogen into the beginning of the heat exchange channel 130. The input end of the reflux mechanism is connected to the end of the heat exchange channel 130. The input end of the reflux mechanism is located at the bottom of the tank 100 and is connected to the beginning of the heat exchange channel 130. The reflux mechanism is used to return the water and hydrogen in the tank 100 to the beginning of the heat exchange channel 130.

[0024] Exhaust gas enters the exhaust pipe 200 and flows along it from the tail end to the head end of the heat exchange channel 130. The water inlet assembly and hydrogen assembly respectively introduce water mist and hydrogen into the tank 100 from the head end of the heat exchange channel 130. The water mist is heated by the exhaust pipe 200 to form water vapor, which mixes with the hydrogen. The hydrogen flow carries the water vapor out through the exhaust pipe 110. Simultaneously, hydrogen is introduced into the tank 100 to maintain stable pressure and water evaporation temperature, increasing evaporation rate and reducing costs. Unevaporated water accumulates at the head end of the heat exchange channel 130 and is then re-formed into water mist and sprayed back into the head end of the heat exchange channel 130 via a reflux mechanism, saving costs and promoting energy conservation and environmental protection. Furthermore, as the exhaust gas flows from the tail end to the head end of the heat exchange channel 130, and the water vapor flows from the head end to the tail end of the heat exchange channel 130, the exhaust pipe 200 continuously heats the water vapor, maintaining a high temperature before it is discharged from the exhaust pipe 110. This water vapor mixes with hydrogen and is then discharged, which can be directly applied to water electrolysis for hydrogen production, resulting in energy conservation and environmental protection. It should be noted that, referring to... Figure 4 The tank 100 can be placed vertically or horizontally, depending on actual needs.

[0025] Furthermore, it is understandable that the generated steam can be used in other heat exchange equipment for secondary heat exchange.

[0026] Reference Figure 1It is understood that in the first embodiment of the reflux mechanism, the reflux mechanism includes a first ejector 413, a first hydrogen pipe 412 and a first reflux pipe 411. The water inlet end of the first reflux pipe 411 is connected to the first end of the heat exchange channel 130, and the water inlet end of the first reflux pipe 411 is located on the bottom side of the tank 100. The water outlet ends of the first hydrogen pipe 412 and the first reflux pipe 411 are both connected to the input end of the first ejector 413, and the output end of the first ejector 413 is connected to the first end of the heat exchange channel 130. The first return pipe 411 is connected to the bottom side of the tank 100, and the water inlet end of the first return pipe 411 is connected to the first end of the heat exchange channel 130. The water mist that has not been heated and evaporated will settle to the bottom of the tank 100, that is, the first end of the heat exchange channel 130. The first ejector 413 is connected to the first hydrogen pipe 412. The first hydrogen pipe 412 introduces hydrogen into the first ejector 413. The airflow is ejected from the output end of the first ejector 413, and a negative pressure is formed in the first ejector 413 to draw back the water. The hydrogen and water are ejected from the first ejector 413 together, forming water mist in the heat exchange channel 130, realizing the recycling of water, saving energy and protecting the environment, avoiding the accumulation of water in the heat exchange channel 130, and avoiding changes in the pressure inside the tank 100. Additionally, a water level monitor can be installed at the beginning of the heat exchange channel 130. By monitoring the water level in the heat exchange channel 130, the water level in the tank 100 can be detected, allowing for timely understanding of the heat exchanger's operating status and reducing safety risks. It should be noted that the ejector is existing technology and will not be described in detail here.

[0027] Reference Figure 1 It is understood that in the first embodiment of the water inlet assembly, the water inlet assembly includes a first water inlet pipe 313 and a second ejector 312, and the hydrogen assembly includes a second hydrogen pipe 311. The first water inlet pipe 313 and the second hydrogen pipe 311 are connected to the input end of the second ejector 312, and the output end of the second ejector 312 is connected to the head end of the heat exchange channel 130. The second ejector 312 is connected to the second hydrogen pipe 311. The second hydrogen pipe 311 introduces hydrogen into the second ejector 312, and the hydrogen is ejected from the output end of the second ejector 312, creating a negative pressure inside the second ejector 312. This pressure drives the water in the first water inlet pipe 313 to flow towards the second ejector 312, and the water is ejected from the second ejector 312 with the hydrogen flow, forming a water mist. The structure is simple. Furthermore, by continuously introducing hydrogen into the tank 100, and expelling the generated water vapor and hydrogen from the exhaust pipe 110, the pressure inside the tank 100 is kept stable, ensuring that the evaporation temperature of the water remains stable. At the same time, the hydrogen flow drives the water to be quickly ejected from the second ejector 312 to form a water mist, requiring no additional power equipment, making it energy-saving and environmentally friendly.

[0028] Reference Figure 2It is understood that in the second embodiment of the water inlet assembly, the water inlet assembly includes a third water inlet pipe and a nozzle 322, and the hydrogen assembly includes a third hydrogen pipe 323. The nozzle 322 is disposed within the heat exchange channel 130 and located at the beginning of the heat exchange channel 130. The water outlet end of the third water inlet pipe is connected to the nozzle 322, and the gas outlet end of the third hydrogen pipe 323 is disposed within the heat exchange channel 130 and located below the nozzle 322. The third water inlet pipe sprays water mist through the nozzle 322, and the third hydrogen pipe 323 is located below the nozzle 322. After the hydrogen is sprayed out from the third hydrogen pipe 323, the hydrogen rises, driving the water mist to move. The mixture of water mist and hydrogen is transported along the heat exchange channel 130 and heated into water vapor by the heat emitted from the exhaust pipe 200. The structure is simple and easy to maintain.

[0029] Reference Figure 2 It is understandable that a water collection tank 150 is provided at the bottom of the tank 100, and the water collection tank 150 is located at the first end of the heat exchange channel 130. The water collection tank 150 is connected to the first return pipe 411. By setting up the water collection tank 150, the unevaporated water mist settles into the water collection tank 150 to form backflow water. The water collection tank 150 can increase the liquid level of the backflow water, thereby improving the sensitivity of the liquid level monitor.

[0030] Reference Figure 3 It is understood that in the second embodiment of the reflux mechanism, the reflux mechanism includes a second reflux pipe 424, a reflux pump, a third ejector 423, and a return air pipe 421. The water inlet of the second reflux pipe 424 is connected to the first end of the heat exchange channel 130, the water outlet of the second reflux pipe 424 is connected to the input end of the third ejector 423, the air inlet of the return air pipe 421 is connected to the tail end of the heat exchange channel 130, the air outlet of the return air pipe 421 is connected to the input end of the reflux pump, the output end of the reflux pump is connected to the input end of the third ejector 423, and the output end of the third ejector 423 is connected to the first end of the heat exchange channel 130. Hydrogen gas entering the tank 100, after passing through the heat exchange channel 130, is recirculated by a reflux pump, which creates negative pressure in the return pipe 421 to recover the hydrogen gas. The recovered hydrogen gas is then transported to the input end of the third ejector 423. The recirculated hydrogen gas carries the water recovered in the second reflux pipe 424, which is then sprayed out as water mist from the output end of the third ejector 423 and input into the beginning of the heat exchange channel 130. This process is recycled, saving resources, reducing costs, and enhancing environmental benefits.

[0031] Reference Figure 1It is understood that the exhaust pipe 200 includes an intake pipe 210, an exhaust pipe 230, and a heat exchange pipe 220. The two ends of the heat exchange pipe 220 are connected to the intake pipe 210 and the exhaust pipe 230, respectively. The heat exchange pipe 220 is bent along the heat exchange channel 130, with the intake pipe 210 located at the tail end of the heat exchange channel 130 and the exhaust pipe 230 located at the head end. Exhaust gas enters through the intake pipe 210 and then enters the heat exchange pipe 220, where it heats the water mist within the heat exchange channel 130, releasing heat. The exhaust gas is then discharged through the exhaust pipe 230, completing the heat exchange and reducing its temperature to the exhaust gas temperature, thus reducing environmental pollution.

[0032] Reference Figure 1 It is understood that the heat exchange tube 220 includes multiple heat exchange sections 221, which are connected in sequence and are bent. By bending the heat exchange sections 221, the length of the heat exchange tube 220 is increased, the heat exchange stroke of the exhaust gas is increased, thereby increasing the residence time of the exhaust gas in the heat exchange channel 130 and improving the heat exchange effect.

[0033] Reference Figure 1 The working process of this utility model is as follows: the exhaust gas enters the heat exchange channel 130 from the tail end of the heat exchange channel 130, and the mixed gas of water mist and hydrogen enters the heat exchange channel 130 from the head end of the heat exchange channel 130. Then it is transported along the heat exchange channel 130. The water mist is heated into water vapor by the heat released by the exhaust pipe 200 and the temperature is maintained. Then it is discharged from the exhaust pipe 110 at the tail end of the heat exchange channel 130. In addition, the water mist that is not evaporated in the tank 100 falls back to the bottom of the tank 100 and is sprayed back into the heat exchange channel 130 through the reflux mechanism.

[0034] In summary, this utility model embodiment provides a heat exchanger where exhaust gas enters the exhaust pipe 200 and flows along the exhaust pipe 200 from the tail end to the head end of the heat exchange channel 130. The water inlet assembly and hydrogen assembly respectively input water mist and hydrogen into the tank 100 from the head end of the heat exchange channel 130. The water mist is heated by the exhaust pipe 200 to form water vapor, which mixes with the hydrogen. The hydrogen flow carries the water vapor out through the exhaust pipe 110. Simultaneously, hydrogen is introduced into the tank 100 to maintain stable pressure and water evaporation temperature, thereby increasing evaporation capacity and reducing costs. Unevaporated water accumulates at the head end of the heat exchange channel 130 and is then re-formed into water mist and sprayed back into the head end of the heat exchange channel 130 via a reflux mechanism, saving costs and promoting energy conservation and environmental protection. In addition, as the exhaust gas flows from the tail end to the head end of the heat exchange channel 130, and the water vapor flows from the head end to the tail end of the heat exchange channel 130, the exhaust pipe 200 can continuously heat the water vapor, keeping the water vapor at a high temperature and sending it out from the exhaust pipe 110. It can also be mixed with hydrogen and discharged together, and can be directly applied to the electrolysis of water to produce hydrogen, which is energy-saving and environmentally friendly.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for ordinary counting personnel in this technical field, several improvements and substitutions can be made without departing from the counting principle of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A heat exchanger, characterized in that, Including: The tank body has at least two baffles inside, and multiple baffles are spaced apart. The multiple baffles cooperate with the inner wall of the tank body to form a heat exchange chamber. The multiple heat exchange chambers are connected end to end to form a meandering heat exchange channel. An exhaust pipe is provided on the outer side of the tail end of the heat exchange channel. The exhaust pipe passes through the tank along the heat exchange channel; The water inlet mechanism includes a water inlet component and a hydrogen component. The water outlet of the water inlet component is located at the beginning of the heat exchange channel. The water inlet component is used to spray water mist toward the exhaust pipe. The hydrogen component is used to introduce hydrogen into the beginning of the heat exchange channel. A reflux mechanism is provided, wherein the input end of the reflux mechanism is connected to the tail end of the heat exchange channel, the input end of the reflux mechanism is located at the bottom of the tank and is connected to the head end of the heat exchange channel, and the reflux mechanism is used to reflux the water and hydrogen in the tank back to the head end of the heat exchange channel.

2. The heat exchanger according to claim 1, characterized in that, The reflux mechanism includes a first ejector, a first hydrogen pipe, and a first reflux pipe. The water inlet of the first reflux pipe is connected to the first end of the heat exchange channel, and the water inlet of the first reflux pipe is located on the bottom side of the tank. The water outlets of the first hydrogen pipe and the first reflux pipe are both connected to the input end of the first ejector, and the output end of the first ejector is connected to the first end of the heat exchange channel.

3. The heat exchanger according to claim 2, characterized in that, The water inlet assembly includes a first water inlet pipe and a second ejector, and the hydrogen assembly includes a second hydrogen pipe. The first water inlet pipe and the second hydrogen pipe are connected to the input end of the second ejector, and the output end of the second ejector is connected to the beginning end of the heat exchange channel.

4. The heat exchanger according to claim 2, characterized in that, The water inlet assembly includes a third water inlet pipe and a nozzle, the hydrogen assembly includes a third hydrogen pipe, the nozzle is disposed in the heat exchange channel and located at the beginning of the heat exchange channel, the water outlet end of the third water inlet pipe is connected to the nozzle, and the gas outlet end of the third hydrogen pipe is disposed in the heat exchange channel and located below the nozzle.

5. The heat exchanger according to claim 4, characterized in that, A water collection trough is provided at the bottom of the tank, and the water collection trough is located at the first end of the heat exchange channel. The water collection trough is connected to the first return pipe.

6. The heat exchanger according to claim 4, characterized in that, The reflux mechanism includes a second reflux pipe, a reflux pump, a third ejector, and a return air pipe. The water inlet of the second reflux pipe is connected to the first end of the heat exchange channel, the water outlet of the second reflux pipe is connected to the input end of the third ejector, the air inlet of the return air pipe is connected to the tail end of the heat exchange channel, the air outlet of the return air pipe is connected to the input end of the reflux pump, the output end of the reflux pump is connected to the input end of the third ejector, and the output end of the third ejector is connected to the first end of the heat exchange channel.

7. The heat exchanger according to claim 1, characterized in that, The exhaust pipe includes an inlet pipe, an outlet pipe, and a heat exchange pipe. The two ends of the heat exchange pipe are connected to the inlet pipe and the outlet pipe, respectively. The heat exchange pipe is bent along the heat exchange channel. The inlet pipe is located at the tail end of the heat exchange channel, and the outlet pipe is located at the head end of the heat exchange channel.

8. The heat exchanger according to claim 7, characterized in that, The heat exchange tube includes multiple heat exchange sections, which are connected in sequence and are arranged in a curved manner.

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