A concentrated brine desalination device for green hydrogen energy industry chain utilization

Abstract

This invention discloses a concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy, relating to the field of concentrated brine desalination technology. It includes: an evaporator, a condenser, a pure water collection tank, and a preheated concentrated brine storage tank. An upper mounting frame and a lower mounting frame are fixedly installed inside the evaporator. The upper end of the deformable heating tube is rotatably connected to the upper mounting frame, and the lower end is fixedly connected to the lower mounting frame. It also includes a drive shaft vertically installed inside the evaporator, driven by a motor mounted on the top of the evaporator. A linkage control mechanism is provided between the drive shaft and the deformable heating tube. This invention employs non-contact self-cleaning technology. The drive shaft periodically twists the deformable heating tube to generate high-frequency micro-deformation, causing the scale on the surface of the deformable heating tube to break and automatically fall off under the action of alternating stress waves. The entire process requires no mechanical scrapers or chemical reagents to contact the tube surface, resulting in zero mechanical damage and no chemical corrosion to the heating tube surface.

Description

Technical Field

[0001] This invention relates to the field of concentrated brine desalination technology, and in particular to a concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy. Background Technology

[0002] Currently, among concentrated brine desalination technologies, multi-effect distillation (MED) and low-temperature multi-effect distillation (LT-MED) are widely used in the electrolysis of water to produce hydrogen in the green hydrogen industry chain due to their low energy consumption and high-quality water. The core heating component of these devices typically uses fixed metal heating tubes (such as titanium alloy tubes) to indirectly heat the concentrated brine via steam or a heat transfer medium. However, the high concentration of salts (such as NaCl and MgCl2) in the concentrated brine easily forms a hard crystalline layer (scale) on the surface of the heating tubes during evaporation, leading to the following technical problems: Decreased thermal efficiency: For every 1mm increase in scale thickness, the heat transfer coefficient decreases by approximately 20%–30%, significantly increasing energy consumption; Shortened equipment lifespan: Traditional scraping descaling requires shutdown, and mechanical scrapers can easily scratch the surface of the heating tubes, accelerating corrosion; High maintenance costs: Manual chemical cleaning requires the use of strong acids (such as HCl), generating chlorinated wastewater, which conflicts with the low-carbon and environmentally friendly requirements of the green hydrogen industry.

[0003] Existing technologies for improving the descaling of heating elements mainly include: Chemical cleaning method: requires regular injection of pickling agent, which poses risks of equipment corrosion, water pollution, and operational safety hazards; Ultrasonic descaling: requires an additional high-frequency generator, increasing system complexity and energy consumption; Mechanical scraping method: Although it can achieve continuous descaling, the direct contact between the scraper and the heating element can easily cause surface damage, and the risk of leakage increases significantly after long-term operation.

[0004] None of the above solutions have resolved the contradiction between "descaling efficiency and equipment lifespan". In particular, in the green hydrogen industry chain, higher requirements are placed on the continuous operation stability and low maintenance cost of concentrated brine desalination units. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of continuous operation stability and low maintenance cost of concentrated brine desalination devices in the prior art, and to propose a concentrated brine desalination device for the industrial chain utilization of green hydrogen energy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy includes: An evaporator containing deformable heating tubes; The condenser has its liquid inlet connected to a concentrated brine source and is connected to the top of the evaporator via a steam pipeline. Pure water collection tank, connected to the vapor phase outlet of the condenser; A preheated concentrated brine storage tank is connected to the liquid phase outlet of the condenser at its inlet end and to the evaporator at its outlet end. An upper mounting bracket and a lower mounting bracket are fixedly installed inside the evaporator; The upper end of the deformable heating tube is rotatably connected to the upper mounting bracket, and the lower end is fixedly connected to the lower mounting bracket. It also includes a drive shaft vertically installed inside the evaporator, the drive shaft being driven by a motor installed on the top of the evaporator, and a linkage control mechanism being provided between the drive shaft and the deformable heating tube; The outer wall of the drive shaft is provided with a stirring element, and the linkage control mechanism can switch between the drive shaft and the deformable heating tube; When the device enters the descaling mode, the drive shaft periodically drives the upper part of the deformable heating tube to rotate, causing the deformable heating tube to undergo elastic deformation to peel off the surface crystals.

[0007] Preferably, the deformable heating tube has a spiral spring-like structure, with an upper mounting ring and a lower mounting ring at its upper and lower ends, respectively. The upper mounting frame has an outer ring groove, the upper mounting ring is nested in the outer ring groove and is rotatably connected to the upper mounting frame, and the lower mounting ring is fixedly connected to the lower mounting frame.

[0008] Preferably, the stirring element is a plurality of spiral blades fixedly installed on the outer wall of the drive shaft.

[0009] Preferably, the linkage control mechanism includes: A sliding opening and a shallow groove are provided on the inner wall of the upper mounting frame. The sliding opening extends laterally through the inner and outer walls of the upper mounting frame, and the shallow groove is located at the corresponding position of the sliding opening and has transition slopes at both ends. A positioning rod is installed on the inner wall of the upper mounting ring, the end of which extends into the sliding opening and abuts against the extreme position on one side of the sliding opening in the initial elastic state of the deformable heating tube; An elastic telescopic rod is provided on the outer wall of the drive shaft. Its telescopic end is provided with a guide wheel and a one-way blocking block. The one-way blocking block only allows one-way deflection.

[0010] Preferably, the one-way blocking block has an L-shaped structure, with its short side close to the end face of the elastic telescopic rod to achieve one-way limiting.

[0011] Preferably, the stroke length of the sliding joint is linearly related to the torsion angle of the upper end of the deformable heating tube, and the torsion angle corresponding to the end of the stroke is 100°-170°.

[0012] Preferably, the condenser is provided with a partition plate to divide the condenser into a top-connected condensation zone and a secondary preheating zone. The condensation zone is provided with a serpentine condenser tube. The inlet and outlet of the serpentine condenser tube serve as the gas phase inlet and outlet of the condenser, and are respectively connected to the steam pipeline and the pure water collection tank.

[0013] Preferably, the outer cover of the condenser is a transparent cover that exposes the secondary preheating zone, the partition plate is provided with a heat-absorbing layer on one side of the secondary preheating zone, and the liquid phase inlet of the condenser is located at the bottom of the condensing zone, and the liquid phase outlet is located at the bottom of the secondary preheating zone.

[0014] Compared with the prior art, the present invention has the following advantages: 1. This invention employs non-contact self-cleaning technology. By periodically twisting the deformable heating tube through a drive shaft and utilizing the elastic potential energy release of its spiral spring-like structure, high-frequency micro-deformation is generated. This causes the scale on the surface of the deformable heating tube to break and automatically fall off under the action of alternating stress waves. The entire process requires no mechanical scraper or chemical reagents to come into contact with the tube surface, resulting in zero mechanical damage and no chemical corrosion on the heating tube surface. This solves common industry problems such as the decrease in tube pressure resistance caused by metal scratches in traditional mechanical scraping methods and equipment corrosion caused by acid and alkali residues in chemical cleaning methods.

[0015] 2. This invention utilizes the heat of the steam to preheat the concentrated brine while condensing the steam in the condenser. Simultaneously, after entering the secondary preheating zone, the concentrated brine absorbs solar heat through the heat absorption plate for secondary preheating. This solves the problem of low evaporation efficiency caused by insufficient preheating of concentrated brine in traditional devices and reduces energy consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy proposed in this invention. Figure 2 This is a cross-sectional structural schematic diagram of a concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy proposed in this invention. Figure 3 This is a front view schematic diagram of a concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy proposed in this invention. Figure 4 This is a schematic diagram of the variable heating tube in a concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy proposed in this invention. Figure 5 for Figure 3 A schematic diagram of the structure along the AA′ section in the middle; Figure 6 This is a schematic diagram of the unidirectional blocking block in the conventional mode of a concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy proposed in this invention. Figure 7 This is a schematic diagram of the unidirectional blocking block in the descaling mode of a concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy proposed in this invention. Figure 8 for Figure 2 A magnified structural diagram of section C; Figure 9 for Figure 3 A schematic diagram of the structure along the BB′ section.

[0017] In the diagram: 1. Evaporator; 2. Condenser; 21. Steam pipe; 22. Divider plate; 23. Serpentine condenser tube; 3. Pure water collection tank; 4. Motor; 5. Preheated concentrated brine storage tank; 6. Deformable heating tube; 61. Upper mounting ring; 62. Lower mounting ring; 63. Positioning rod; 7. Upper mounting bracket; 71. Sliding port; 72. Shallow groove; 73. Transition slope; 8. Lower mounting bracket; 9. Linkage control mechanism; 10. Drive shaft; 101. Stirring component; 102. Elastic telescopic rod; 103. Guide wheel; 104. One-way blocking block. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Reference Figure 1-9 A concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy includes an evaporator 1, a condenser 2, a pure water collection tank 3, and a preheated concentrated brine storage tank 5.

[0021] Evaporator 1 is equipped with a deformable heating tube 6. Concentrated brine is introduced into evaporator 1 and electrically heated by the deformable heating tube 6, causing the brine to evaporate and produce steam. The power consumed by the deformable heating tube 6 is generated by offshore wind power and solar power, thus achieving green and pollution-free operation. The liquid inlet of condenser 2 is connected to the concentrated brine source and is connected to the top of evaporator 1 via steam pipe 21. The steam generated in evaporator 1 is introduced into condenser 2, where concentrated brine is introduced as a coolant. The steam is cooled and liquefied to obtain pure water, achieving desalination of the concentrated brine. Pure water collection tank 3 is connected to... The vapor outlet of condenser 2 allows liquefied pure water to be collected in pure water collection tank 3. The inlet of the preheated concentrated brine storage tank 5 is connected to the liquid outlet of condenser 2, and the outlet is connected to evaporator 1. The temperature of the concentrated brine increases after heat exchange with the steam in condenser 2, thus preheating the concentrated brine. The preheated concentrated brine enters the preheated concentrated brine storage tank 5 and replenishes the concentrated brine in evaporator 1. Because the concentrated brine is preheated, energy consumption can be effectively reduced and evaporation efficiency can be improved. It should be noted that a slag discharge pipe is installed at the bottom of evaporator 1 to remove sea salt crystals and other impurities.

[0022] An upper mounting bracket 7 and a lower mounting bracket 8 are fixedly installed inside the evaporator 1. Both the upper mounting bracket 7 and the lower mounting bracket 8 are annular structures. The upper mounting bracket 7 has an L-shaped cross-section. The upper end of the deformable heating tube 6 is rotatably connected to the upper mounting bracket 7, and the lower end is fixedly connected to the lower mounting bracket 8.

[0023] Reference Figure 2 and 4 The deformable heating tube 6 has a spiral spring-like structure, with an upper mounting ring 61 and a lower mounting ring 62 at its upper and lower ends, respectively. The upper mounting ring 61 and the lower mounting ring 62 serve as the upper and lower supports of the deformable heating tube 6, and are both ring structures. The upper mounting frame 7 has an outer ring groove, and the upper mounting ring 61 is nested in the outer ring groove and rotatably connected to the upper mounting frame 7. The lower mounting ring 62 is fixedly connected to the lower mounting frame 8.

[0024] Specifically, the high concentration of salt in concentrated brine easily forms a hard crystalline layer on the surface of the deformable heating tube 6 during evaporation. For every 1 mm increase in salt scale thickness, the heat transfer coefficient decreases by about 20% to 30%, significantly increasing energy consumption. The deformable heating tube 6 is made of elastic material and has a helical spring structure. The lower mounting ring 62 is fixed in position. When the upper mounting ring 61 rotates, the deformable heating tube 6 will twist circumferentially. Due to the characteristics of the spring shape of the deformable heating tube 6, the pitch of the helix will decrease and the number of turns will increase due to the rotation of the upper mounting ring 61. Therefore, with the axial length of the deformable heating tube 6 remaining unchanged, its helical diameter will also decrease, and each part will produce a small amount of deformation. The salt crystals on the surface of the deformable heating tube 6 have a brittle structure. When the deformable heating tube 6 deforms, the structure of the salt crystals will be destroyed, thereby losing adhesion and falling off naturally. Therefore, it can achieve the function of cleaning the surface of the deformable heating tube 6 and improving thermal efficiency.

[0025] Reference Figure 2-8 The concentrated brine desalination device also includes a drive shaft 10 vertically installed in the evaporator 1. The drive shaft 10 is driven by a motor 4 installed on the top of the evaporator 1. A linkage control mechanism 9 is provided between the drive shaft 10 and the deformable heating tube 6.

[0026] The linkage control mechanism 9 has two working modes during the rotation of the drive shaft 10 driven by the motor 4: a normal mode and a descaling mode. In the embodiment, the normal mode is when the drive shaft 10 rotates clockwise, and the descaling mode is when the drive shaft 10 rotates counterclockwise. By switching between the two modes under appropriate working conditions, efficient evaporation is ensured in the normal mode, and the scale on the surface of the deformable heating tube 6 is quickly removed in the descaling mode. The descaling mode is only activated after the evaporation efficiency decreases to avoid prolonged operation, which could lead to metal fatigue damage to the deformable heating tube 6.

[0027] When the equipment enters the descaling mode, the drive shaft 10 periodically drives the upper part of the deformable heating tube 6 to rotate, causing the deformable heating tube 6 to undergo elastic deformation to peel off the surface crystals.

[0028] The outer wall of the drive shaft 10 is provided with a stirring element 101. The linkage control mechanism 9 can switch between the drive shaft 10 and the deformable heating tube 6. When the drive shaft 10 is working, it will drive the stirring element 101 to rotate, stirring the concentrated brine in the evaporator 1, thereby improving the uniformity of heating of the concentrated brine and improving the evaporation effect.

[0029] The agitator 101 consists of multiple spiral blades fixedly installed on the outer wall of the drive shaft 10, which is beneficial for driving the mixing and flow of concentrated brine.

[0030] Reference Figure 2-8 The linkage control mechanism 9 includes: A sliding opening 71 and a shallow groove 72 are provided on the inner wall of the upper mounting frame 7. The sliding opening 71 extends horizontally through the inner and outer walls of the upper mounting frame 7. The shallow groove 72 is located at the corresponding position of the sliding opening 71 and has transition slopes 73 at both ends. The shallow groove 72 is located on the inner side of the upper mounting frame 7. A positioning rod 63 is provided on the inner wall of the upper mounting ring 61. Its end extends into the slide 71 and abuts against one extreme position of the slide 71 in the elastic initial state of the deformable heating tube 6. The slide 71 at this extreme position does not coincide with the transition slope 73. An elastic telescopic rod 102 is provided on the outer wall of the drive shaft 10. The elastic telescopic rod 102 consists of two coaxially sleeved square tubes connected by a spring to achieve axial extension and retraction. Its telescopic end is provided with a guide wheel 103 and a one-way blocking block 104. Under the action of the spring, the guide wheel 103 at the end of the elastic telescopic rod 102 abuts against the inner wall of the upper mounting frame 7, and the guide wheel 103 enables flexible movement. The one-way blocking block 104 only allows one-way deflection. Through the one-way limiting of the one-way blocking block 104, it produces different effects with the positioning rod 63 in different directions of action, realizing the state switching of the linkage control mechanism 9.

[0031] Reference Figure 2-8 The one-way blocking block 104 has an L-shaped structure, and its short side is close to the end face of the elastic telescopic rod 102 to achieve one-way limiting. The pivot of the one-way blocking block 104 is located at its bending part and is equipped with a torsion spring, so that the short side of the one-way blocking block 104 tends to be close to the end face of the elastic telescopic rod 102.

[0032] like Figure 7 As shown, when the drive shaft 10 rotates counterclockwise in descaling mode: The guide wheel 103 slides along the inner wall of the upper mounting bracket 7 to the transition slope 73 and then extends into the shallow groove 72; the one-way blocking block 104 forms a rigid abutment with the positioning rod 63, pushing the positioning rod 63 from the first limit position of the slide 71 to the second limit position, where the slide 71 coincides with the transition slope 73; when the second limit position is reached, the guide wheel 103 contacts the other side of the transition slope 73 and exits the shallow groove 72, and the one-way blocking block 104 disengages from the positioning rod 63; the deformable heating tube 6 elastically resets, causing the positioning rod 63 to return to the first limit position; like Figure 6 As shown, in normal mode, when drive shaft 10 rotates clockwise: The one-way blocking block 104 can freely deflect past the positioning rod 63 and does not form a driving connection with the positioning rod 63.

[0033] The stroke length of the sliding port 71 is linearly related to the torsion angle of the upper end of the deformable heating tube 6. The torsion angle corresponding to the end of the stroke is 100°-170°. In this embodiment, two sets of sliding ports 71 are symmetrically arranged. When it is necessary to increase the torsion angle, only one set of sliding ports 71 can be set to increase the torsion angle to 280°-350°.

[0034] Reference Figure 1-3 and Figure 9 The condenser 2 is equipped with a partition plate 22 to divide the condenser 2 into a top-connected condensing zone and a secondary preheating zone. The condensing zone is equipped with a serpentine condenser tube 23. The inlet and outlet of the serpentine condenser tube 23 serve as the gas phase inlet and outlet of the condenser 2, and are respectively connected to the steam pipeline 21 and the pure water collection tank 3.

[0035] The original concentrated brine enters from the bottom inlet of condenser 2. When it flows through the outer wall of the serpentine condenser tube 23, it absorbs the latent heat of steam condensation, thereby cooling the steam and liquefying it, thus completing the concentrated brine desalination operation. At the same time, the temperature of the concentrated brine used for cooling increases, thus completing the initial preheating.

[0036] The outer cover of the condenser 2 is a transparent cover that exposes the secondary preheating zone. The partition plate 22 is provided with a heat absorption layer on one side of the secondary preheating zone. The liquid phase inlet of the condenser 2 is located at the bottom of the condensing zone, and the liquid phase outlet is located at the bottom of the secondary preheating zone.

[0037] The preheated concentrated brine overflows into the secondary preheating zone through the top connecting part of the partition plate 22. Under the action of the heat absorption layer, the temperature is further increased after 2 to 3 minutes of residence. The two-stage preheating reduces the temperature difference of the concentrated brine entering the evaporator 1, thereby reducing the evaporation energy consumption.

[0038] The specific working principle of this invention is as follows: Concentrated brine is introduced into evaporator 1, while the original concentrated brine enters condenser 2 from the bottom inlet of condenser 2. Deformable heating tube 6 is electrically heated by electricity provided by offshore wind power and solar power, so that the concentrated brine in evaporator 1 evaporates to produce water vapor.

[0039] Motor 4 drives drive shaft 10 to rotate, and the stirring element 101 on the outer wall of drive shaft 10 rotates accordingly, stirring the concentrated brine in evaporator 1, improving the uniformity of heating of concentrated brine and enhancing evaporation effect.

[0040] The concentrated brine entering condenser 2 absorbs the latent heat of vapor condensation as it flows through the outer wall of the serpentine condenser tube 23, thus cooling and liquefying the steam and completing the initial preheating. At this time, the steam exchanges heat with the concentrated brine through the serpentine condenser tube 23 in the condensation zone of condenser 2, condensing into pure water. The pure water flows into the pure water collection tank 3 through the vapor outlet of condenser 2 for collection.

[0041] After initial preheating, the concentrated brine overflows through the top connecting part of the partition plate 22 into the secondary preheating zone. Under the action of the heat absorption layer set on one side of the partition plate 22 in the secondary preheating zone, the temperature is further increased after 2 to 3 minutes, completing the double-stage preheating. The preheated concentrated brine flows out from the liquid phase outlet of the condenser 2 and enters the preheated concentrated brine storage tank 5. The preheated concentrated brine in the preheated concentrated brine storage tank 5 is connected to the evaporator 1 for concentrated brine replenishment.

[0042] When the evaporation efficiency decreases, it is determined that salt scale may have formed on the surface of the deformable heating tube 6. The descaling mode is activated, causing the motor 4 to drive the drive shaft 10 to rotate counterclockwise.

[0043] When the drive shaft 10 rotates, the guide wheel 103 at the end of the elastic telescopic rod 102 slides along the inner wall of the upper mounting bracket 7 to the transition slope 73 and then extends into the shallow groove 72.

[0044] The one-way blocking block 104 forms a rigid contact with the positioning rod 63, pushing the positioning rod 63 from the first limit position of the slide 71 to the second limit position. When it reaches the second limit position, the guide wheel 103 contacts the other side transition slope 73 and exits the shallow groove 72. The one-way blocking block 104 disengages from the positioning rod 63, and the deformable heating tube 6 elastically resets, causing the positioning rod 63 to return to the first limit position. When the deformable heating tube 6 deforms, the structure of the salt crystal is destroyed, loses its adhesion and falls off naturally, thus cleaning the surface of the deformable heating tube 6.

[0045] After descaling is completed, switch back to the normal mode and make the motor 4 drive the drive shaft 10 to rotate clockwise. At this time, the one-way blocking block 104 can freely deflect past the positioning rod 63 and does not form a drive connection with the positioning rod 63. The deformable heating tube 6 remains in normal condition, and the equipment continues to carry out efficient concentrated brine desalination.

Claims

1. A concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy, characterized in that, include: Evaporator (1), which is equipped with deformable heating tube (6); The condenser (2) has its liquid inlet connected to a concentrated brine source and is connected to the top of the evaporator (1) via a steam pipe (21); Pure water collection tank (3) is connected to the gas phase outlet of condenser (2); The preheated concentrated brine storage tank (5) is connected to the liquid phase outlet of the condenser (2) at the inlet end and to the evaporator (1) at the outlet end. The evaporator (1) is fixedly installed with an upper mounting bracket (7) and a lower mounting bracket (8). The upper end of the deformable heating tube (6) is rotatably connected to the upper mounting bracket (7), and the lower end is fixedly connected to the lower mounting bracket (8); It also includes a drive shaft (10) vertically installed in the evaporator (1), the drive shaft (10) being driven by a motor (4) installed on the top of the evaporator (1), and a linkage control mechanism (9) being provided between the drive shaft (10) and the deformable heating tube (6). The outer wall of the drive shaft (10) is provided with a stirring element (101), and the linkage control mechanism (9) can switch between the drive shaft (10) and the deformable heating tube (6). When the device enters the descaling mode, the drive shaft (10) periodically drives the upper part of the deformable heating tube (6) to rotate, causing the deformable heating tube (6) to undergo elastic deformation to peel off the surface crystals.

2. The concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy according to claim 1, characterized in that, The deformable heating tube (6) has a spiral spring-like structure, with an upper mounting ring (61) and a lower mounting ring (62) at its upper and lower ends, respectively. The upper mounting frame (7) has an outer ring groove, and the upper mounting ring (61) is nested in the outer ring groove and rotatedly connected to the upper mounting frame (7). The lower mounting ring (62) is fixedly connected to the lower mounting frame (8).

3. The concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy according to claim 1, characterized in that, The stirring component (101) consists of multiple spiral blades fixedly installed on the outer wall of the drive shaft (10).

4. The concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy according to claim 1, characterized in that, The linkage control mechanism (9) includes: A sliding opening (71) and a shallow groove (72) are provided on the inner wall of the upper mounting frame (7). The sliding opening (71) extends horizontally through the inner and outer walls of the upper mounting frame (7). The shallow groove (72) is located at the corresponding position of the sliding opening (71) and has transition slopes (73) at both ends. A positioning rod (63) is provided on the inner wall of the upper mounting ring (61), the end of which extends into the slide (71) and abuts against the extreme position of one side of the slide (71) in the elastic initial state of the deformable heating tube (6). An elastic telescopic rod (102) is provided on the outer wall of the drive shaft (10), and its telescopic end is provided with a guide wheel (103) and a one-way blocking block (104). The one-way blocking block (104) only allows one-way deflection.

5. A concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy according to claim 4, characterized in that, The one-way blocking block (104) has an L-shaped structure, and its short side is close to the end face of the elastic telescopic rod (102) to achieve one-way limiting.

6. A concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy according to claim 5, characterized in that, The stroke length of the slide (71) is linearly related to the torsion angle of the upper end of the deformable heating tube (6), and the torsion angle corresponding to the end of the stroke is 100°-170°.

7. A concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy according to claim 1, characterized in that, The condenser (2) is provided with a partition plate (22) to divide the condenser (2) into a top-connected condensing zone and a secondary preheating zone. The condensing zone is provided with a serpentine condensing tube (23). The inlet and outlet of the serpentine condensing tube (23) serve as the gas phase inlet and outlet of the condenser (2), and are respectively connected to the steam pipeline (21) and the pure water collection tank (3).

8. A concentrated brine desalination device for the industrial-scale utilization of green hydrogen energy according to claim 7, characterized in that, The outer cover of the condenser (2) is a transparent cover that exposes the secondary preheating zone. The partition plate (22) is provided with a heat-absorbing layer on one side of the secondary preheating zone. The liquid phase inlet of the condenser (2) is located at the bottom of the condensing zone, and the liquid phase outlet is located at the bottom of the secondary preheating zone.

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