Industrial boiler continuous drainage purification and recovery device

Abstract

This invention provides an industrial boiler continuous wastewater purification and recovery device, relating to the field of continuous wastewater purification technology. The device, connected in parallel to the boiler's existing continuous wastewater treatment system, includes an enthalpy-reducing and conditioning atomization system. Its inlet is connected via a bypass pipeline to both the boiler's continuous wastewater expansion tank and the fixed wastewater expansion tank, atomizing the wastewater into droplets with a particle size ≤50μm at a pressure of 1-2MPa. This industrial boiler continuous wastewater purification and recovery device changes the traditional easily fouling heat exchanger structure, employing pressure atomization, enthalpy difference vaporization, and titanium-based filtration to achieve dual recovery of heat energy and water resources, reducing operating costs. Furthermore, the device uses a dual-filter architecture (one in use, one on standby), allowing regeneration to be completed without shutting down the system. It requires no additional power equipment besides valves, resulting in a low failure rate. By bypassing the existing system and integrating with a DCS intelligent control system, it offers advantages such as remote operation, convenient maintenance, energy saving, and environmental friendliness.

Description

Technical Field

[0001] This invention relates to the field of continuous wastewater purification technology, specifically to a device for purifying and recovering continuous wastewater from industrial boilers. Background Technology

[0002] Continuous blowdown is high-temperature concentrated wastewater that must be continuously discharged during boiler operation to control the salinity of boiler water and ensure steam quality. During boiler evaporation, feedwater continuously vaporizes, and the dissolved salts and impurities accumulate in the boiler water. Continuous blowdown is the core process for actively discharging this high-concentration boiler water and maintaining water quality balance. Direct discharge of continuous blowdown without recycling results in significant energy and water waste. Its temperature is close to the saturation temperature under boiler pressure, and it is already chemically treated demineralized water. Furthermore, it causes thermal pollution and salt load shocks to the environment. Therefore, systematic recycling and resource utilization of continuous blowdown has become a crucial aspect of industrial energy conservation, emission reduction, and cleaner production.

[0003] Existing continuous runoff wastewater recovery technology is constrained by the high temperature, high salinity, high alkalinity, and fluctuating water quality of continuous runoff wastewater, resulting in numerous significant drawbacks. The overall heat recovery rate is extremely low; expansion tanks can only recover less than 15% of the flash steam, and even with the addition of heat exchangers, the overall heat recovery rate is only about 50%, far below the theoretical limit. Simultaneously, over 95% of the water is still discharged as wastewater, causing severe waste of water resources and heat energy, environmental pollution, and requiring companies to invest substantial funds annually in wastewater treatment and fresh water replenishment. Traditional flash evaporation and heat exchange processes cannot simultaneously address the scale-prevention stability and heat recovery efficiency of high-salinity water. High salt concentrations easily lead to scale buildup, clogging pipes and exacerbating equipment corrosion. Installing heat exchangers further complicates the system, requiring regular cleaning and replacement of heat exchange elements, significantly increasing maintenance difficulty and downtime frequency. Furthermore, the systems generally lack the ability to adapt to fluctuations in water quality. The heat recovery rate drops sharply under low load and the risk of scaling increases sharply under high load. Moreover, the level of intelligence is insufficient, and parameters are mostly set by human experience. It is impossible to achieve real-time prediction and dynamic optimization of scaling tendency, heat load matching degree and water quality indicators. The synergistic efficiency of waste heat recovery and water purification is low, the cascade utilization of heat energy is insufficient, the load of purification units is unbalanced, and it is difficult to improve the compliance rate of recycled water quality and system energy efficiency at the same time. The balance between technology selection and economic benefits is extremely difficult. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an industrial boiler continuous wastewater purification and recovery device, which solves the problems of low thermal efficiency, limited water reuse, and high operation and maintenance costs in continuous wastewater recovery.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an industrial boiler continuous wastewater purification and recovery device, wherein the device is connected in parallel with the boiler's existing continuous wastewater treatment system, comprising: The enthalpy-reducing and conditioning atomization system has its inlet connected to the continuous blowdown expansion tank and the constant blowdown expansion tank of the boiler via bypass pipelines. It is used to atomize the continuous blowdown water into droplets with a particle size ≤50μm under a pressure of 1-2MPa. The superheated steam inlet pipeline has its first end connected to the steam turbine exhaust outlet of the boiler, and its second end connected to the steam inlet of the enthalpy-reducing conditioning and atomizing system through the steam inlet pipeline. This is used to directly introduce superheated steam into the enthalpy-reducing conditioning and atomizing system so that the droplets can be completely vaporized in the superheated steam environment. The nano-scale titanium-based purification component has its inlet connected to the steam outlet of the enthalpy-reducing and conditioning atomization system, which is used to intercept salt and impurities in the vaporized steam. The nano-scale titanium-based purification component adopts a multi-layer sintered metal filter element structure. An online detection device is connected in series with the main outlet of the nanoscale titanium-based purification component to detect the water quality of the purified steam. The vaporization of the water droplets within the deenthalpy conditioning atomization system is driven solely by the superheat of the introduced superheated steam, without relying on any heat exchange for heat transfer.

[0006] Preferably, the inlet pipe of the enthalpy-reducing and conditioning atomization system is connected to the outlet pipe of the continuous expansion tank and the outlet pipe of the fixed expansion tank via a first tee; the first inlets of the continuous expansion tank and the fixed expansion tank are connected to the boiler drum via water supply pipes; the outlet pipe of the continuous expansion tank is connected to its water supply pipe via a second tee; and the outlet pipe of the fixed expansion tank is connected to its water supply pipe via a third tee.

[0007] Preferably, the nano-scale titanium-based purification component adopts a dual-filter parallel architecture. The inlets of the two filters are connected to the outlet of the enthalpy-reducing and conditioning atomization system via a fourth three-way valve, and the outlets of the two filters are connected to the user end via a fifth three-way valve through the main steam outlet. Each filter is connected to a pressure difference-triggered pulse backflush regeneration system and an immersion regeneration system, which are configured to automatically trigger the pulse backflush regeneration unit and the immersion regeneration unit to clean and regenerate the offline filter when the pressure difference between the inlet and outlet of the filter exceeds 0.05 MPa.

[0008] Preferably, the superheated steam inlet pipe is also connected to a desuperheater that regulates the temperature of the superheated steam by desuperheating water; the second end of the superheated steam inlet pipe is also connected to the user end through a steam outlet branch, and a steam isolation valve group is provided on the steam outlet branch.

[0009] Preferably, it also includes a DCS control and alarm system, which is electrically connected to the online detection device, the desuperheater, the steam isolation valve group, and the electrically controlled valves, pressure transmitter assemblies, and temperature transmitter assemblies installed on each pipeline connected to the enthalpy-reducing and conditioning atomization system and the nano-scale titanium-based purification component.

[0010] Preferably, the original continuous wastewater treatment system of the boiler system includes a deaerator, a heat exchanger, a water pump, and a demineralized water tank; the water pump and the demineralized water tank are sequentially connected to the first inlet of the heat exchanger; the outlet of the continuous wastewater expansion tank is simultaneously connected to the inlet of the fixed wastewater expansion tank and the first inlet of the heat exchanger, and the outlet of the fixed wastewater expansion tank is connected to a high-temperature water tank; the first outlet of the heat exchanger is connected to the continuous wastewater expansion tank through a deaerator, and the second outlet of the heat exchanger is connected to a sewage tank; when the industrial boiler continuous wastewater purification and recovery device malfunctions, the boiler system switches to the original continuous wastewater treatment system for operation.

[0011] This invention provides an industrial boiler wastewater purification and recovery device. It has the following beneficial effects: 1. This invention provides an industrial boiler continuous wastewater purification and recovery device. This technology achieves highly efficient recovery of heat energy and water resources, and completely eliminates the heat exchanger structure indispensable in traditional continuous wastewater recovery systems, fundamentally avoiding the problem of scaling and clogging of heat exchange surfaces by high-salt wastewater. The device requires no mechanical power equipment such as pumps, has a simple structure and is easy to operate, and also saves the maintenance costs and downtime losses caused by the regular cleaning and replacement of heat exchange elements. Its dual recovery efficiency of heat energy and water resources is extremely high, with only a very small amount of wastewater discharged during the entire process of regeneration, achieving near-zero discharge and significantly reducing the capital investment in wastewater treatment and fresh water replenishment. At the same time, it is connected to the boiler system in parallel in a bypass form, without changing the original operating parameters and safety interlocks of the boiler. In case of abnormality, it can quickly switch back to the original system to ensure the continuous and safe operation of the boiler.

[0012] 2. This invention provides an industrial boiler wastewater purification and recovery device. This technology boasts excellent purification effects, outstanding operational reliability, and a high level of intelligence. The nano-level titanium-based purification component employs multi-layer sintered metal filter elements, which can efficiently trap various salts and impurities in steam, such as phosphates, calcium and magnesium ion deposits, and silica, producing high-quality steam. The filter elements adopt a one-in-one-out parallel architecture, equipped with a differential pressure-triggered pulse backflushing and soaking regeneration system, enabling filter element cleaning and regeneration without shutting down the system, achieving seamless switching in the purification process. The device is fully integrated into a DCS system, allowing for remote operation of the entire process, real-time monitoring of key parameters such as water quality and differential pressure, and automatic alarms. It possesses excellent adaptability to operating conditions and effectively saves labor costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the system flow of the present invention.

[0014] The components include: 1. Steam drum; 2. Continuous exhaust expansion tank; 3. Fixed exhaust expansion tank; 4. Deaerator; 5. Heat exchanger; 6. Water pump; 7. Demineralized water tank; 8. Steam turbine; 9. Enthalpy-reducing conditioning atomization system; 10. Nanoscale titanium-based purification components; 11. Online monitoring device; 12. Desuperheater; 13. Desuperheating water; and 14. User terminal. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figure 1 As shown, this embodiment of the invention provides an industrial boiler continuous wastewater purification and recovery device. The device is connected in parallel with the boiler's existing continuous wastewater treatment system and includes: The enthalpy-reducing conditioning atomization system 9 has its inlet connected to the boiler's continuous discharge expansion tank 2 and constant discharge expansion tank 3 via bypass pipelines. The continuous discharge water and constant discharge water in the continuous discharge expansion tank 2 and constant discharge expansion tank 3 enter the enthalpy-reducing conditioning atomization system 9 using the boiler's own pressure (usually 3-10 MPa). A pressure drop of 1-2 MPa is generated through a special nozzle, causing the water jet to break up and form ultrafine droplets with a particle size ≤50 μm.

[0017] The superheated steam inlet pipeline has its first end connected to the exhaust outlet of the steam turbine 8 of the boiler, and its second end connected to the steam inlet of the enthalpy-reducing conditioning and atomizing system 9 through the steam inlet pipeline. This is used to directly introduce superheated steam into the enthalpy-reducing conditioning and atomizing system 9 so that the droplets can be completely vaporized in the superheated steam environment. The nano-level titanium-based purification component 10 has its inlet connected to the steam outlet of the enthalpy-reducing and conditioning atomization system 9, and is used to intercept salt and impurities in the vaporized steam. The nano-level titanium-based purification component 10 adopts a multi-layer sintered metal filter element structure. The online detection device 11 is connected in series with the main outlet of the nano-scale titanium-based purification component 10 and is used to detect the water quality of the purified steam. The vaporization of the internal drainage droplets in the deenthalpy conditioning atomization system 9 is driven solely by the superheat of the introduced superheated steam, without relying on any other heat exchanger for heat exchange.

[0018] The deenthalpy conditioning atomization system 9 atomizes the continuous drainage into ultrafine droplets with a particle size of ≤50μm. The superheat of the superheated steam introduced by the steam turbine 8 directly drives the droplets to completely vaporize, solving the problems of scaling, clogging, corrosion and cavitation erosion on traditional heat exchange surfaces. At the same time, the nano-level titanium-based purification component 10 intercepts the salt after vaporization and the online detection device 11 monitors the water quality in real time, realizing the dual recovery of heat energy and water resources. Moreover, the entire device does not require any pumps or mechanical power equipment except for the valve actuator, reducing operating energy consumption and equipment failure rate.

[0019] The inlet pipe of the enthalpy-reducing and conditioning atomization system 9 is connected to the outlet pipe of the continuous expansion tank 2 and the outlet pipe of the fixed expansion tank 3 via a first tee. The first inlets of the continuous expansion tank 2 and the fixed expansion tank 3 are connected to the boiler drum 1 via water supply pipes. The outlet pipe of the continuous expansion tank 2 is connected to its water supply pipe via a second tee, and the outlet pipe of the fixed expansion tank 3 is connected to its water supply pipe via a third tee.

[0020] The inlet pipe of the enthalpy-reducing and conditioning atomization system 9 is simultaneously connected to the continuous discharge expansion tank 2 and the fixed discharge expansion tank 3 via the first tee, enabling the device to simultaneously treat two types of high-temperature and high-salinity wastewater generated by continuous and periodic boiler blowdowns. This expands the wastewater recovery coverage and avoids the waste of energy and water resources caused by direct discharge of fixed discharge. At the same time, the continuous discharge expansion tank 2 and the fixed discharge expansion tank 3 each form an inlet and outlet bypass structure through the second and third tee, respectively. This eliminates the need for large-scale modification of the original boiler blowdown pipeline. Only a few valves need to be added to complete the system parallel connection, reducing the difficulty of engineering modification and investment costs. Furthermore, it allows for flexible selection of either continuous or fixed discharge to be treated separately according to actual operating needs.

[0021] The nano-level titanium-based purification component 10 adopts a dual-filter parallel architecture. The inlets of the two filters are connected to the outlet of the enthalpy-reducing and conditioning atomization system 9 through the fourth three-way valve, and the outlets of the two filters are connected to the user terminal 14 through the fifth three-way valve via the main steam outlet. Each filter is connected to a pressure difference-triggered pulse backflush regeneration system and an immersion regeneration system. The system is configured to automatically trigger the pulse backflush regeneration unit and the immersion regeneration unit to clean and regenerate the offline filter when the pressure difference between the inlet and outlet of the filter exceeds 0.05 MPa.

[0022] The nano-level titanium-based purification component 10, employing a dual-filter parallel architecture, enables independent switching between the two filters via the fourth and fifth three-way valves. Combined with a pressure-differential triggered pulse backflushing regeneration system and an immersion regeneration system, it automatically switches to the standby filter when the pressure difference between the inlet and outlet of the operating filter exceeds 0.05 MPa. Simultaneously, it performs dual cleaning and regeneration on offline filters, solving the problem of traditional filtration systems requiring shutdown for cleaning and affecting continuous boiler operation. Pulse backflushing quickly removes the scale layer on the filter surface, while immersion regeneration removes impurities remaining in the backflushing dead zones. This ensures stable recovery of filter throughput, avoids damage to the filter substrate, extends filter life, and reduces filter replacement frequency and maintenance costs.

[0023] The superheated steam inlet pipe is also connected to a desuperheater 12 that regulates the temperature of the superheated steam through desuperheating water 13; the second end of the superheated steam inlet pipe is also connected to the user end 14 through a steam outlet branch, and a steam isolation valve group is installed on the steam outlet branch.

[0024] By installing a desuperheater 12 and introducing desuperheating water 13 on the superheated steam inlet pipeline, the temperature of the output steam can be adjusted according to the actual needs of the user terminal 14, so that the steam parameters are stabilized within the commonly used range of 1-2MPa and 200-300℃, meeting the parameter requirements of different heating or reuse scenarios. At the same time, the superheated steam inlet pipeline is directly connected to the user terminal 14 through the steam outlet branch and is equipped with a steam isolation valve group. This allows for the direct supply of superheated steam discharged from the turbine 8 to the user terminal 14 during the maintenance of this unit, ensuring the continuity of heating. It also allows for the rapid cut-off of the superheated steam supply in case of unit malfunction, achieving safe isolation between the unit and the boiler system, and improving the flexibility and reliability of operation.

[0025] It also includes a DCS control and alarm system, which is electrically connected to the online detection device 11, the desuperheater 12, the steam isolation valve group, and the electrically controlled valves, pressure transmitter assemblies, and temperature transmitter assemblies installed on each pipeline connected to the enthalpy-reducing and conditioning atomization system 9 and the nano-level titanium-based purification component 10.

[0026] By configuring an independent DCS control and alarm system, centralized control and data acquisition of the online monitoring device 11, desuperheater 12, steam isolation valve group, and all electrically controlled valves, pressure transmitters, and temperature transmitters are realized. The entire process of the device, including start-up, shutdown, preheating, steam parameter adjustment, and filter regeneration, can be completed remotely without the need for on-site human supervision, which greatly saves labor costs. At the same time, the DCS system can monitor the operating status of the device and water quality parameters in real time. Once an abnormality occurs, a graded alarm is immediately triggered, avoiding problems such as increased scaling risk and decreased heat recovery rate caused by manually setting parameters based on experience, thus improving the system's intelligence level and operational stability.

[0027] The original continuous wastewater treatment system of the boiler system includes a deaerator 4, a heat exchanger 5, a water pump 6, and a demineralized water tank 7; the water pump 6 and the demineralized water tank 7 are connected to the first inlet of the heat exchanger 5 in sequence; the outlet of the continuous wastewater expansion tank 2 is connected to both the inlet of the fixed wastewater expansion tank 3 and the first inlet of the heat exchanger 5, and the outlet of the fixed wastewater expansion tank 3 is connected to the high-temperature water tank; the first outlet of the heat exchanger 5 is connected to the continuous wastewater expansion tank 2 through the deaerator 4, and the second outlet of the heat exchanger 5 is connected to the sewage tank. The high-temperature water tank and the sewage tank are merged into the sewage treatment tank; when the industrial boiler continuous wastewater purification and recovery device malfunctions, the boiler system switches to the original continuous wastewater treatment system.

[0028] The entire system is connected in parallel to the existing boiler drainage treatment system, which consists of deaerator 4, heat exchanger 5, water pump 6, and demineralized water tank 7, in a bypass configuration. This does not alter the boiler's operating parameters or safety interlock logic, and the installation and modification process will not affect the normal operation of the boiler. When this purification and recovery device malfunctions or requires maintenance, the boiler system can be quickly switched back to the original drainage treatment system via valve switching, avoiding the boiler downtime risk that may result from device modification. This achieves seamless compatibility between the old and new systems, reducing users' concerns about modification and operational risks.

[0029] The working principle of this technology is as follows: During the operation of boiler drum 1, the continuous drainage and constant drainage generated are respectively sent to continuous drainage expansion tank 2 and constant drainage expansion tank 3 through water supply pipelines for preliminary expansion treatment. During normal operation of this purification and recovery device, the valve from continuous drainage expansion tank 2 to heat exchanger 5 in the original continuous drainage treatment system is closed, and the bypass valve to enthalpy-reducing and conditioning atomization system 9 is opened. The high-temperature and high-salt wastewater in continuous drainage expansion tank 2 and constant drainage expansion tank 3 are combined through the first three-way valve and enter the inlet of enthalpy-reducing and conditioning atomization system 9. At the same time, the steam outlet branch on the superheated steam inlet pipeline leading to user end 14 is closed. The steam isolation valve assembly introduces high-temperature superheated steam discharged from turbine 8 into the steam inlet of the enthalpy-reducing conditioning and atomizing system 9 via a superheated steam inlet pipeline. Driven by a pressure of 1-2 MPa, the enthalpy-reducing conditioning and atomizing system 9 atomizes the incoming continuous and constant flow water into ultrafine droplets with a particle size ≤50 μm. These ultrafine droplets, within the high-temperature superheated steam environment inside the enthalpy-reducing conditioning and atomizing system 9, utilize the superheat of the superheated steam to release latent heat and absorb sensible heat, completely vaporizing into superheated steam. The entire vaporization process is driven solely by the enthalpy difference of the introduced superheated steam, without relying on any other heat exchangers for indirect heating. The high-volume exchange avoids the scaling and clogging problems of traditional heat exchange structures. Most of the dissolved salts (such as phosphates, calcium and magnesium ions, and silica) in the continuous and constant-volume drainage are precipitated as fine solid particles due to water vaporization, flowing with the steam flow. Some low-boiling-point salts may exist as aerosols or tiny droplets, which can be efficiently intercepted by the subsequent nano-scale titanium-based purification component 10. These droplets, along with the superheated steam generated by vaporization, flow out from the steam outlet of the enthalpy-reducing and conditioning atomization system 9, and then enter the inlet of the nano-scale titanium-based purification component 10 through the fourth three-way valve. The nano-scale titanium-based purification component 10 employs multiple... The layered sintered metal filter element structure can intercept all solid salt particles and impurities carried in the steam flow. The purified superheated steam flows out from the outlet of the nano-level titanium-based purification component 10, merges into the main steam outlet through the fifth three-way valve, and then flows through the online detection device 11 connected in series on the main steam outlet. The online detection device 11 detects key water quality parameters such as conductivity, pH value, and sodium ion content of the purified steam in real time. When the detection results meet the preset reuse standards, the clean steam is directly delivered to the user end 14, which can enter the user end of the steam heating pipeline network or be reused by 14 to the boiler deaerator 4. Throughout the operation, the DCS control and alarm system collects real-time monitoring data from pressure and temperature transmitters installed on various pipelines, as well as water quality data from the online monitoring device 11. When the output steam temperature needs to be adjusted, the DCS control and alarm system automatically controls the opening of the desuperheater 12, introducing desuperheating water 13 to regulate the temperature of the superheated steam, thus stabilizing the output steam parameters within the user-required range of 1-2 MPa and 200-300℃. When the DCS control and alarm system detects the inlet and outlet of the operating nano-scale titanium-based purification component 10... When the differential pressure exceeds the set limit of 0.05MPa, the system automatically triggers an alarm and automatically switches to the standby filter unit to continue operation. At the same time, the pulse backflush regeneration system of the offline filter is started, using high-pressure pulse airflow to blow and clean the salt scale layer deposited on the surface of the filter. After the pulse backflush is completed, the soaking regeneration system is started, using a special cleaning solution to soak and rinse the filter to remove impurities left over from the backflush and those in the dead corners of the backflush. The standby filter will automatically preheat after regeneration is completed, ready to switch to operation at any time, achieving seamless switching of the purification process and continuous and stable operation of the system. When the online monitoring device 11 detects abnormal water quality parameters of the purified steam, or when the DCS control alarm system detects other faults in the device, the system will immediately trigger a graded alarm. The operator can close all valves leading to the enthalpy-reducing and conditioning atomization system 9 with one click through the DCS control alarm system, and at the same time open the relevant valves of the original continuous drainage treatment system to quickly switch the boiler system back to the original continuous drainage treatment system. When the original continuous drainage treatment system is running, the wastewater discharged from the continuous drainage expansion tank 2 enters the heat exchanger 5 and undergoes indirect heat exchange with the demineralized water drawn from the demineralized water tank 7 by the water pump 6. Part of the wastewater after heat exchange is sent to the deaerator 4 for recycling, and the other part is discharged into the sewage tank. The wastewater discharged from the fixed drainage expansion tank 3 is directly discharged into the high-temperature water tank. The entire device does not require any pumps or mechanical power equipment except for the valve actuator. Only a very small amount of wastewater is discharged during filter element regeneration, resulting in high efficiency in heat energy and water resource recovery.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An industrial boiler wastewater purification and recovery device, characterized in that, The device is connected in parallel to the boiler's existing continuous drainage system, and includes: The enthalpy-reducing and conditioning atomization system (9) has its inlet connected to the boiler's continuous discharge expansion tank (2) and constant discharge expansion tank (3) via bypass pipelines. It is used to atomize the continuous discharge water into droplets with a particle size ≤50μm under a pressure of 1-2MPa. The superheated steam inlet pipeline has its first end connected to the exhaust outlet of the steam turbine (8) of the boiler, and its second end connected to the steam inlet of the enthalpy-reducing and conditioning atomizing system (9) through the steam inlet pipeline. This is used to directly introduce superheated steam into the enthalpy-reducing and conditioning atomizing system (9) so that the droplets can be completely vaporized in the superheated steam environment. The nano-scale titanium-based purification component (10) has its inlet connected to the steam outlet of the enthalpy-reducing and conditioning atomization system (9) to trap salt and impurities in the vaporized steam. The nano-scale titanium-based purification component (10) adopts a multi-layer sintered metal filter element structure. An online detection device (11) is connected in series with the main outlet of the nano-scale titanium-based purification component (10) to detect the water quality of the purified steam. The vaporization of the water droplets in the deenthalpy conditioning atomization system (9) is driven solely by the superheat of the introduced superheated steam, without relying on any heat exchange for heat exchange.

2. The industrial boiler wastewater purification and recovery device according to claim 1, characterized in that: The inlet pipe of the enthalpy-reducing and conditioning atomization system (9) is connected to the outlet pipe of the continuous expansion tank (2) and the outlet pipe of the fixed expansion tank (3) through the first tee. The first inlets of the continuous expansion tank (2) and the fixed expansion tank (3) are connected to the boiler drum (1) through the water supply pipe. The outlet pipe of the continuous expansion tank (2) is connected to its water supply pipe through the second tee. The outlet pipe of the fixed expansion tank (3) is connected to its water supply pipe through the third tee.

3. The industrial boiler wastewater purification and recovery device according to claim 1, characterized in that: The nano-scale titanium-based purification component (10) adopts a dual-filter parallel architecture. The inlets of the two filters are connected to the outlet of the enthalpy-reducing atomization system (9) through the fourth three-way valve, and the outlets of the two filters are connected to the user end (14) through the fifth three-way valve via the main steam outlet. Each filter is connected to a pressure difference-triggered pulse backflush regeneration system and an immersion regeneration system, which are configured to automatically trigger the pulse backflush regeneration unit and the immersion regeneration unit to clean and regenerate the offline filter when the pressure difference between the inlet and outlet of the filter exceeds 0.05MPa.

4. The industrial boiler wastewater purification and recovery device according to claim 1, characterized in that: The superheated steam inlet pipe is also connected to a desuperheater (12) that regulates the temperature of the superheated steam by desuperheating water (13); the second end of the superheated steam inlet pipe is also connected to the user end (14) through a steam outlet branch, and a steam isolation valve group is provided on the steam outlet branch.

5. The industrial boiler wastewater purification and recovery device according to claim 4, characterized in that: It also includes a DCS control and alarm system, which is electrically connected to the online detection device (11), the desuperheater (12), the steam isolation valve group, and the electrically controlled valves, pressure transmitter assemblies and temperature transmitter assemblies arranged on each pipeline connected to the enthalpy-reducing and conditioning atomization system (9) and the nano-scale titanium-based purification assembly (10).

6. The industrial boiler wastewater purification and recovery device according to claim 1, characterized in that: The original continuous drainage treatment system of the boiler system includes a deaerator (4), a heat exchanger (5), a water pump (6), and a demineralized water tank (7); the water pump (6) and the demineralized water tank (7) are connected in sequence to the first inlet of the heat exchanger (5); the outlet of the continuous drainage expansion tank (2) is simultaneously connected to the inlet of the fixed drainage expansion tank (3) and the first inlet of the heat exchanger (5), and the outlet of the fixed drainage expansion tank (3) is connected to the high-temperature water pool; the first outlet of the heat exchanger (5) is connected to the continuous drainage expansion tank (2) through the deaerator (4), and the second outlet of the heat exchanger (5) is connected to the sewage pool; when the industrial boiler continuous drainage purification and recovery device malfunctions, the boiler system switches to the original continuous drainage treatment system.

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