A high-efficiency evaporation device for concentrated brine treatment equipment

Abstract

This invention discloses a high-efficiency evaporation device for concentrated brine treatment, belonging to the field of industrial wastewater treatment technology. The device includes an injection port, nested inner and outer spiral tube assemblies, and a straight pipe connecting the two. The inner spiral tube employs a tapered structure to accelerate the spiral descent of the liquid, while the outer spiral tube, driven by a corrugated guide channel and an air pump, achieves the spiral ascent of the liquid, forming a counter-current gas-liquid contact. A double-spiral heating copper tube is installed in the gas chamber to directly heat the descending cold air to 80-100°C, which is then uniformly released into the liquid chamber through porous ceramic through-holes to agitate the concentrated brine. The injection port extension pipe integrates a plate heat exchanger, utilizing the waste heat of the discharged gas to preheat the incoming liquid, achieving cascaded utilization of thermal energy.

Description

Technical Field

[0001] This utility model provides a high-efficiency evaporation device, and particularly relates to a high-efficiency evaporation device for concentrated brine treatment equipment. Background Technology

[0002] High-efficiency brine evaporation devices are key equipment in the field of industrial wastewater treatment. Their core function is to achieve salt concentration and crystallization separation by driving water evaporation with thermal energy. In existing technologies, typical devices mostly adopt a single-stage spiral tube or plate evaporation structure, and the basic components include an evaporation chamber, built-in electric heating elements, a circulating pump, and a gas-liquid separator.

[0003] However, single spiral or flat flow channels result in short gas-liquid contact time and limited heat transfer area, leading to generally low evaporation efficiency; the heating element is directly immersed in high-salt liquid, making the tube wall prone to scaling and requiring frequent shutdowns for cleaning. Utility Model Content

[0004] In order to solve the above problems, this application provides a high-efficiency evaporation device for concentrated brine treatment equipment, which solves the problems of low evaporation efficiency and easy scaling of existing devices.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-efficiency evaporation device for concentrated brine treatment equipment, including a liquid injection port, an internal spiral tube connected to itself below the liquid injection port, and an external spiral tube connected to both ends of itself sleeved outside the internal spiral tube.

[0006] The inner spiral tube and the outer spiral tube are connected by a straight tube, and the inner spiral tube, the outer spiral tube and the straight tube are all provided with interconnected liquid chambers and gas chambers;

[0007] The gas chamber is equipped with several support plates; both the inner spiral tube and the outer spiral tube are equipped with heating copper tubes placed inside the gas chamber.

[0008] Preferably, the bottom side of the outer spiral tube is connected to an external power source via a transmission wire electrically connected to the heating copper tube; the upper end of the outer spiral tube is connected to the outlet of an air pump via an air pipe communicating with the gas chamber.

[0009] Preferably, the gas chamber between the end of the inner spiral tube near the trachea and the straight tube is not connected; a through hole is provided between the gas chamber and the liquid chamber at the end of the outer spiral tube away from the trachea to connect the two.

[0010] Preferably, the injection port includes a conical inlet end, and the inlet end is provided with an extension tube that is connected to both the corresponding straight pipe liquid chamber and gas chamber.

[0011] Preferably, the transmission wires and the external spiral tube and heating copper tube are all sealed.

[0012] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0013] This concentrated brine treatment equipment achieves efficient heating by optimizing the counter-current flow path and heat exchange mechanism between gas and liquid. Specifically, when the air pump is started, cold air is injected into the gas chamber of the outer spiral tube through the air pipe at the top. As the cold air naturally sinks, the heating copper pipe embedded inside the outer spiral tube continuously heats the air in the gas chamber. Simultaneously, the heating copper pipe in the gas chamber of the inner spiral tube works synchronously, forming a dual heat source. As the cold air spirals down along the outer spiral tube, the gas gradually heats up due to the structural advantage of the extended heat exchange time caused by the spiral path, and finally enters the liquid chamber through the bottom through-hole. At this point, the fully heated gas, under the dual action of the rising hot gas principle and the continuous pressurization of the air pump, forms an upward airflow in the liquid chamber, violently agitating the concentrated brine in the outer spiral tube. This not only enhances the gas-liquid contact area but also accelerates heat transfer through the turbulence effect. At the same time, the liquid is injected from the conical inlet end of the injection port, naturally spirals down along the inner spiral tube, enters the bottom of the outer spiral tube through the straight pipe, and spirals up along the outer spiral tube under continuous inlet pressure, forming a liquid path that flows counter-currently to the heating gas. This counter-current design ensures that the high-temperature gas with the greatest temperature gradient remains in constant contact with the low-temperature liquid, significantly improving heat transfer efficiency. During system operation, the heating copper tube directly heats the air in the gas chamber, then transfers the heat to the liquid chamber through the gas-liquid interface. Compared to traditional methods of directly heating the liquid, this avoids scaling on the tube walls and achieves staged energy utilization. When the liquid rises to the extension tube, a dynamic equilibrium is reached, while the gas carrying residual heat is ultimately discharged through the extension tube, completing a multi-stage heat energy utilization cycle. The overall structure, through designs such as the spiral tube extending the flow channel, counter-current gas-liquid disturbance, and the synergistic use of dual heating sources, comprehensively improves evaporation efficiency.

[0014] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation of a high-efficiency evaporation device for a concentrated brine treatment equipment according to this utility model;

[0016] Figure 2 This is a cross-sectional view of a high-efficiency evaporation device for a concentrated brine treatment equipment according to this utility model;

[0017] Figure 3 This is a schematic diagram of the internal state of the tube body of the high-efficiency evaporation device of the concentrated brine treatment equipment of this utility model;

[0018] Figure 4 This is a schematic diagram of the through hole portion of the high-efficiency evaporation device of a concentrated brine treatment equipment according to this utility model.

[0019] As shown in the figure:

[0020] 1. Injection port; 2. Internal spiral tube; 3. External spiral tube; 4. Straight tube; 5. Liquid chamber; 6. Gas chamber; 7. Support plate; 8. Heating copper tube; 9. Transmission wire; 10. External power supply; 11. Air pipe; 12. Air pump; 13. Through hole; 14. Liquid inlet end; 15. Extension tube. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figure 1 and Figure 2 As shown, this high-efficiency evaporation device includes a liquid inlet 1, below which is connected an internal spiral tube 2. An external spiral tube 3, connected to both ends of the internal spiral tube 2, is fitted around the external spiral tube 3. The two are connected by a straight tube 4, and both tubes contain interconnected liquid chambers 5 and gas chambers 6. Several support plates 7 are located within the gas chambers 6 of both the internal spiral tube 2 and the external spiral tube 3. Heating copper tubes 8 are installed within the gas chambers 6. The liquid inlet 1 includes a tapered inlet end 14, whose extension tube 15 connects to the corresponding liquid chamber 5 and gas chamber 6 of the straight tube 4. The transmission wire 9, the external spiral tube 3, and the heating copper tube 8 are all sealed.

[0025] In this embodiment, the structure achieves efficient evaporation through the following synergistic effects: the injection port 1 and the conical inlet end 14 are designed with a 60° tilt angle to accelerate the gravity flow of concentrated brine and form laminar flow, reducing energy loss caused by liquid turbulence; the internal spiral tube 2 adopts a tapered spiral structure, utilizing the Bernoulli effect to increase the liquid descent speed by 0.5-1 m / s, shortening the residence time in the initial heating stage; the external spiral tube 3 is driven by the corrugated guide groove and the air pump 12 to make the liquid rise steadily at a speed of 0.3-0.6 m / s, forming a countercurrent contact with the spirally descending hot air in the gas chamber 6, maximizing the temperature difference heat transfer efficiency; the straight tube 4 serves as a transition node between the gas and liquid chambers, and the flange sealing connection ensures the pressure balance of the two-phase flow, avoiding uneven gas-liquid mixing; the heating copper tube 8 uses a double spiral... The spiral layout embeds the gas chambers 6 of the inner and outer spiral tubes, directly heating the air medium. Compared with traditional immersion electric heating tubes, the thermal resistance is reduced by 40%, and the nano-alumina insulation layer prevents heat loss. The support plate 7 adopts a honeycomb porous structure, which not only strengthens the compressive strength of the spiral tubes, but also extends the gas residence time through turbulence. The through hole 13 adopts a porous ceramic distributor to uniformly inject 80-100℃ hot air into the liquid chamber 5. Combined with the baffle array, it forms microbubble agitation, increasing the gas-liquid mass transfer area by 2-3 times. The extension tube 15 integrates a plate heat exchanger, which uses the waste heat of the exhaust gas to preheat the liquid inlet, realizing the cascade utilization of thermal energy and reducing the overall energy consumption by more than 15%. The ceramic sealing structure of the transmission wire 9 and the duplex stainless steel anti-corrosion coating work together to ensure the continuous operation life of the device in high temperature and high salt environment.

[0026] Through the integrated design of countercurrent contact, staged heating, dynamic disturbance and heat recovery, the evaporation efficiency is increased to over 75%. At the same time, through PID temperature control and PLC automation interlocking, the precise matching of gas-liquid flow, temperature and concentration is ensured, ultimately achieving industrial continuous evaporation operation with low scaling rate and high stability.

[0027] like Figure 3 and Figure 4 As shown, the bottom of the outer spiral tube 3 of the device is connected to an external power supply 10 via a transmission wire 9 electrically connected to the heating copper tube 8, and the upper end is connected to the outlet of the air pump 12 via an air pipe 11 that communicates with the gas chamber 6. The gas chamber 6 between the inner spiral tube 2 near the air pipe 11 and the straight tube 4 is not open, while the gas chamber 6 of the outer spiral tube 3 away from the air pipe 11 has a through hole 13 between it and the liquid chamber 5. During operation, concentrated brine flows in from the injection port 1 and circulates through the liquid chamber 5 of the inner spiral tube 2 and the outer spiral tube 3 for heating and evaporation. The heating copper tube 8 is energized, and the generated steam is guided through the gas chamber 6, the support plate 7, and the air pipe 11, and then discharged by the air pump 12. This structure achieves efficient evaporation and steam guidance, improving the efficiency of concentrated brine treatment.

[0028] In this implementation plan, the specific implementation points and parameter configurations for each core structure are as follows:

[0029] 1. Spiral Tube and Connection Structure: The inner spiral tube is a tapered 316L stainless steel spiral tube, and the outer spiral tube is a uniform diameter S32205 duplex stainless steel spiral tube. The two are connected by a DN80 flanged straight pipe with a wall thickness of 3mm. The flange gasket is a graphite spiral wound gasket. 2. Heating and Energy Supply System: The heating copper tube is a T2 copper tube, spirally wound around the inner wall of the gas chamber with a pitch of 30mm. Each tube is 15m long and has a resistance of 0.8Ω / m. It is connected by a BVVR4mm... 2 1. High-temperature resistant cable: Connects to a 380V three-phase AC power supply. The cable joint is sealed with an IP67-rated ceramic insulating sleeve. 2. Gas-liquid circulation control module: The air pump uses a volute centrifugal fan, the air pipe is a DN50 pressure-resistant corrugated pipe, and the through hole uses a porous alumina ceramic plate, installed 10cm from the end of the external spiral pipe. 3. Thermal management and anti-corrosion design: The support plate is a honeycomb 304 stainless steel plate, the extension pipe is embedded with a BR05 plate heat exchanger, and the outer wall of the spiral pipe is sprayed with a 0.2mm thick PTFE coating. 4. Automation control unit: A PT100 temperature sensor and an EJA510A pressure transmitter are installed at the gas chamber outlet, which are connected to a Siemens S7-1200 PLC controller via Modbus protocol to adjust the air pump frequency and heating power in a coordinated manner.

[0030] Synergistic effect of key parameters: The tapered structure of the internal spiral tube increases the liquid flow velocity from 0.3 m / s at the inlet to 0.8 m / s at the outlet, reducing salt deposition on the tube wall; the constant diameter design of the external spiral tube, combined with the 3000 Pa air pressure of the air pump, ensures that the liquid rising velocity is stable at 0.5 m / s, forming a counter-current with the 80°C hot air spiraling downwards in the gas chamber, achieving a heat transfer coefficient of 450 W / (m³). 2 •K); The 15m total length of the heating copper tube provides 12kW heating power, and PID control ensures that the gas chamber temperature fluctuation is ≤±2℃; the 30% opening ratio of the through hole balances the gas-liquid two-phase flow, preventing gas short-circuiting or liquid backflow. Each component achieves an evaporation intensity ≥25kg / (m³) through precise parameter matching. 2 ·h), which improves efficiency by more than 40% compared to the traditional single helix structure.

[0031] Based on the above implementation scheme, the following technical details and collaborative implementation methods with existing technical means need to be further clarified during the operation of this device to ensure the integrity of the scheme:

[0032] Spiral tube installation and sealing structure: The inner spiral tube and the outer spiral tube are nested and welded with flanges. The two are axially fixed through the threaded interface of the straight tube, and the entire spiral tube is fixed to the inner wall of the evaporator shell by the bracket. The heating copper tube is embedded in the spiral tube interlayer in a spiral winding manner. The space between it and the spiral tube wall is filled with a high-temperature resistant silicone sealing layer, and it is led out to connect to the external power supply through the ceramic insulating sleeve of the transmission wire.

[0033] Gas-liquid countercurrent control logic: The air pump uses a frequency converter to regulate the air pressure (0.2-0.5MPa). When cold air is injected into the gas chamber at the top of the external spiral tube through the air pipe, the power of the heating copper tube is dynamically adjusted (5-10kW) through the PID temperature control module to ensure that the gas temperature rises from 25℃ to 80-100℃ during the spiral descent. The through hole adopts a porous ceramic distributor design (pore diameter 1-2mm, spacing 50mm) to allow hot air to permeate evenly into the liquid chamber. At the same time, a baffle array is set in the liquid chamber to prolong the gas-liquid contact time.

[0034] Liquid flow path optimization: The conical inlet of the injection port has an inclination angle of 60°, and the ratio of the inner diameter of the extension tube to the pitch of the internal spiral tube is 1:3, utilizing gravity to form laminar flow; the internal spiral tube adopts a tapered spiral structure (initial inner diameter 80mm, end inner diameter 50mm), accelerating the liquid descent velocity to 0.5-1m / s through the Bernoulli effect; the inner wall of the external spiral tube is equipped with corrugated guide grooves, which, combined with the gas thrust generated by the air pump, stabilize the liquid rise velocity at 0.3-0.6m / s, avoiding gas-liquid two-phase flow separation;

[0035] Heat recovery and corrosion protection design: The extension tube outlet section integrates a plate heat exchanger, which uses the waste heat of the exhaust gas (60-70℃) to preheat the concentrated brine (initial temperature 20-30℃) input at the injection port, reducing the energy consumption of the heating copper tube; the spiral tube and support plate are made of duplex stainless steel S32205, with a polytetrafluoroethylene anti-corrosion coating (0.2mm thick) sprayed on the surface, and the outer wall of the heating copper tube is covered with a nano-alumina insulation layer (1mm thick) to prevent corrosion from high salt solutions;

[0036] Under certain requirements, this device can be integrated with automated control: a temperature sensor (PT100) and a pressure transmitter (range 0-1MPa) are installed at the gas chamber outlet of the external spiral tube to provide real-time data feedback to the PLC controller, which then adjusts the air pump frequency (30-50Hz) and the heating copper tube power to maintain gas chamber temperature fluctuations ≤±2℃; a conductivity meter (range 0-200mS / cm) is installed in the liquid chamber, which triggers a solenoid valve to introduce the concentrated liquid into the crystallization tank when the salt concentration reaches the crystallization critical value, thus realizing continuous evaporation-crystallization linkage operation.

[0037] By supplementing the above technologies and combining them with existing mature technologies such as mechanical seals (ISO3069 standard), PID control (IEC61131-3 programming), and anti-corrosion coatings (ASTMA967 process), a complete technical closed loop covering structural design, material selection, control logic, and energy management is formed. This ensures that the device meets the requirements for industrial application in terms of countercurrent heat transfer efficiency (increased to 68-75%), anti-scaling performance (scaling rate ≤0.1mm / 100h), and operational stability (MTBF≥8000h).

[0038] Furthermore, in one or more feasible embodiments, the following situations exist:

[0039] Liquid Flow Path Injection Stage: Concentrated brine enters from the conical inlet of the injection port by gravity flow, with an initial velocity of approximately 0.3 m / s. It is then distributed to the liquid chamber of the inner spiral tube through the extension tube. Spiral Descent Stage: The liquid descends spirally along the inner spiral tube (a tapered spiral, with an initial inner diameter of 80 mm and a final diameter of 50 mm), accelerating to 0.5-0.8 m / s under the Bernoulli effect, shortening the preheating time. During the descent, it indirectly exchanges heat with the rising hot air in the gas chamber through the tube wall. Transition Stage: The liquid enters the bottom of the outer spiral tube through the liquid chamber of the straight tube. The straight tube flange seal ensures stable pressure (0.2-0.3 MPa). Spiral Ascent Stage: The liquid spirals upwards along the corrugated guide groove inside the outer spiral tube (velocity 0.3-0.6 m / s), coming into countercurrent contact with the 80-100°C hot air descending in the gas chamber. The hot air entering through the through-hole violently agitates the liquid, enhancing mass and heat transfer. Circulation and discharge stage: When the liquid rises to the extension tube, the waste heat is recovered through the built-in plate heat exchanger (preheating the inlet liquid to 40-50℃). Finally, after the concentrated brine reaches the set concentration, it is switched to the crystallization tank by the solenoid valve, and the unevaporated liquid continues to circulate.

[0040] Gas flow path, cold air injection stage: air pump (air volume 2000m³ / h) 3 Cold air at 25-30℃ is injected into the gas chamber at the top of the external spiral tube through a duct (air pressure 3000Pa). Spiral descent and heating stage: The gas spirals down along the gas chamber of the external spiral tube, continuously heated to 80-100℃ by a heated copper tube (power 5-10kW); the honeycomb structure of the support plate extends the gas residence time to 15-20s, improving heating efficiency. Hot air release stage: The hot air that has descended to the bottom of the external spiral tube evenly infiltrates into the liquid chamber through a through-hole (porous ceramic distributor, 30% porosity), forming microbubbles (1-2mm in diameter) that rise. Gas-liquid mixing and turbulence stage: During the ascent of the hot air in the liquid chamber, turbulence is generated by the baffle array, increasing the gas-liquid mass transfer area by 2-3 times, while simultaneously pushing the liquid upward (velocity difference 0.3m / s). Waste heat recovery and discharge stage: The gas carrying waste heat (60-70℃) is preheated by the plate heat exchanger of the extension tube before entering the liquid. The temperature drops to 40-50℃ and is finally discharged from the system by the gas pump.

[0041] The counter-current design of liquid and gas flow, with a synergistic effect of the path (temperature gradient 60℃ / m, velocity difference 0.3m / s), achieves a heat transfer coefficient of 450W / (m³). 2 ·K), evaporation intensity ≥25kg / (m 2 The combination of gas agitation and liquid spiral flow controls the scaling rate on the pipe wall to below 0.1 mm / 100 h, achieving efficient and stable continuous evaporation.

[0042] It should be noted that, to prevent liquid from seeping back into the gas chamber through the through-hole, the following technical means can be used to achieve gas-liquid isolation while ensuring efficient gas injection into the liquid chamber:

[0043] Porous media flow-limiting technology structural design: The through-holes are replaced with hydrophobic porous ceramics or sintered metals (pore diameter 0.5-1mm, porosity 20-30%), utilizing capillary effect to block liquid permeation. Material characteristics: The porous media surface is treated with a polytetrafluoroethylene (PTFE) coating (contact angle > 110°) to enhance hydrophobicity, allowing only gas to pass through while repelling high-salt liquids. Pressure differential control: A gas pump maintains the gas chamber pressure (0.25-0.35MPa) slightly higher than the liquid chamber pressure (0.2-0.3MPa), creating a positive gas pressure differential to suppress liquid backflow.

[0044] Dynamic gas curtain technology for gas jet barrier: An annular gas nozzle is added to the liquid chamber side of the through-hole. Controlled by a miniature solenoid valve, an inert gas (such as nitrogen) is continuously injected into the liquid chamber at a pressure of 0.1-0.2 MPa, forming a gas curtain isolation layer at the orifice. Collaborative control: The pressure sensor in the liquid chamber provides real-time feedback data, dynamically adjusting the airflow intensity of the gas curtain to ensure a stable gas-liquid interface.

[0045] Mechanical one-way valve design: An umbrella-shaped check valve (material: Hastelloy C276) is installed on the gas chamber side of the through-hole. The valve plate thickness is 0.5mm, and the spring preload is set to 0.15MPa. Operating logic: When the gas chamber pressure ≥ 0.15MPa, the valve plate opens to release gas; when the liquid chamber pressure abnormally increases, the valve plate closes to prevent liquid backflow. Corrosion resistance optimization: The valve body surface is coated with a tungsten carbide coating (50μm thickness), which can withstand high-salt corrosion environments with pH 2-12.

[0046] Gradient orifice distribution design: The through-hole is designed as a stepped variable diameter structure, with a 1mm orifice diameter on the gas chamber side and a reduced diameter of 0.3mm on the liquid chamber side. The gradually narrowing flow channel accelerates the gas flow velocity (up to 5m / s locally), generating negative pressure to adsorb the gas through the Venturi effect. Simultaneously, the liquid cannot flow backwards due to viscous resistance. Flow field simulation: The orifice gradient ratio is optimized through CFD simulation (1:0.3 recommended) to ensure a pressure drop of <5% when the gas flux is ≥200L / min.

[0047] Electrodialysis-assisted isolation electric field barrier: Titanium electrode plates (10mm spacing) are installed on both sides of the through-hole, and a 10-15V DC voltage is applied. The ionic conductivity of the concentrated brine forms an electric field barrier, causing charged ions in the liquid to move away from the orifice area under the influence of the electric field. Energy consumption control: A pulsed power supply (30% duty cycle) is used, with power consumption <50W / m. 2 To avoid electrolytic side reactions.

[0048] Technology Comparison and Selection Recommendations

[0049]

[0050]

[0051] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A high-efficiency evaporation device of a concentrated brine treatment equipment, comprising a liquid injection port (1), characterized in that: Below the injection port (1) is an internal spiral tube (2) that communicates with itself, and an external spiral tube (3) that communicates with both ends of itself is sleeved on the outside of the internal spiral tube (2). The inner spiral tube (2) and the outer spiral tube (3) are connected by a straight tube (4). The inner spiral tube (2), the outer spiral tube (3) and the straight tube (4) are all provided with interconnected liquid chambers (5) and gas chambers (6). The gas chamber (6) is provided with several support plates (7); the internal spiral tube (2) and the external spiral tube (3) are both provided with heating copper tubes (8) placed inside the gas chamber (6).

2. The high-efficiency evaporation device of a concentrated brine treatment apparatus according to claim 1, characterized by: The bottom side of the external spiral tube (3) is connected to an external power source (10) via a transmission wire (9) electrically connected to the heating copper tube (8); the upper end of the external spiral tube (3) is connected to the outlet of an air pump (12) via an air pipe (11) connected to the gas chamber (6).

3. The high-efficiency evaporation device of a concentrated brine treatment apparatus according to claim 2, characterized by: The gas chamber (6) between the end of the inner spiral tube (2) near the air tube (11) and the straight tube (4) is not connected; a through hole (13) is provided between the gas chamber (6) and the liquid chamber (5) at the end of the outer spiral tube (3) away from the air tube (11) to connect the two.

4. The high efficiency evaporation device of a concentrated brine treatment plant according to claim 1, characterized in that: The injection port (1) includes a conical inlet end (14), and the inlet end (14) is provided with an extension tube (15) that is connected to the liquid chamber (5) and gas chamber (6) of the corresponding straight tube (4).

5. The high efficiency evaporation device of a concentrated brine treatment plant according to claim 2, characterized in that: The transmission wire (9), the external spiral tube (3), and the heating copper tube (8) are all sealed.

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