A water storage type water bath steam generator and steam generation method thereof

Abstract

The present invention discloses a water-storage water-bath steam generator and a steam generating method thereof, belonging to the technical field of steam generators. The water-storage water-bath steam generator comprises: a water-bath evaporator, wherein a heat inlet chamber and a superheating chamber are provided on the top of the water-bath evaporator, a heat exchange chamber is provided in the middle, and a steam-water separation chamber is provided at the bottom; a heat exchange coil and a superheating pipe are provided inside the heat exchange chamber, a fluid inlet and a fluid outlet are provided outside the heat exchange chamber, a superheated steam outlet is provided in the superheating chamber, and a saturated steam outlet is provided in the steam-water separation chamber; a pure water inlet is provided in the heat inlet chamber; a circulating pump, wherein the circulating pump is connected to the fluid inlet and the fluid outlet through a pipeline; a pressure relief valve, wherein the pressure relief valve is provided on the top of the water-bath evaporator and connected to the heat inlet chamber; the present invention adopts water-storage technology, and the water-storage system can quickly release the stored heat energy and generate steam in a short time, thereby meeting the sudden increase in demand while buffering the fluctuation of external energy input and ensuring the continuous and stable supply of steam.

Description

Technical Field

[0001] The invention relates to a water storage type water bath steam generator and a steam generating method thereof, belonging to the technical field of steam generators. Background Art

[0002] A steam generator is a device that converts water into steam. It transfers heat energy to the water through fuel combustion, electricity, or other energy sources, causing it to evaporate into steam. Its core function is to efficiently and safely produce steam that meets specific requirements. It is widely used in industries such as industry, energy, healthcare, and food processing.

[0003] As an important thermal energy conversion device, steam generators play a key role in industrial production, power supply, energy recovery and other fields. Traditional steam generators need to generate steam by heating stored water. The steam production rate is slow, the thermal efficiency is generally low, and most of them use a closed structure. Once the pressure exceeds the critical value, it may explode. Due to the compact structure, it is difficult to provide sufficient space for steam and water separation, resulting in low steam dryness and common wet steam problems. Wet steam will reduce heat exchange efficiency, increase the risk of pipeline corrosion, and even affect product quality. In addition, the non-condensable steam generated in the steam system easily adheres to the surface of the condenser to form a gas film, increasing thermal resistance and energy consumption, and causing problems such as pipeline oxidation and corrosion. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art by providing a water-storage water-bath steam generator and a steam generation method thereof. Utilizing water-storage technology, the water-storage system rapidly releases stored thermal energy, generating steam in a short period of time. This system can meet sudden surges in demand while buffering fluctuations in external energy input (such as intermittent renewable energy), ensuring a continuous and stable steam supply. Furthermore, the system utilizes water-bath heating, eliminating open flame combustion and achieving near-zero nitrogen oxide emissions. The waste heat recovery rate is high, and the water-bath medium isolates the heating element from direct contact with the steam, minimizing the risk of dry-burn explosions. A pressure relief valve is also included to ensure system safety.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0006] In a first aspect, the present invention provides a water storage type water bath steam generator, comprising:

[0007] A water bath evaporator is provided with a heat inlet chamber and a superheating chamber at the top, a heat exchange chamber in the middle, and a steam-water separation chamber at the bottom. A heat exchange coil and a superheating tube are provided inside the heat exchange chamber. A fluid inlet and a fluid outlet are provided outside the heat exchange chamber. The two ends of the heat exchange coil are respectively connected to the heat inlet chamber and the steam-water separation chamber. The two ends of the superheating tube are respectively connected to the superheating chamber and the steam-water separation chamber. The superheating chamber is provided with a superheated steam outlet, and the steam-water separation chamber is provided with a saturated steam outlet. The heat inlet chamber is provided with a pure water inlet.

[0008] A circulating pump connected to a fluid inlet and a fluid outlet via a pipeline, for inputting high-temperature fluid into the heat exchange chamber to form a closed-loop circulation;

[0009] The pressure relief valve is arranged at the top of the water bath evaporator and is connected to the heat inlet chamber. It is used to automatically relieve pressure when the cavity pressure exceeds a threshold value, and serves as a discharge bypass to discharge non-condensable steam generated during the heat exchange process.

[0010] Furthermore, it also includes a steam-water partition, which is installed at the top and bottom of the water bath evaporator to separate the cavity into a heat inlet chamber, a superheating chamber, a heat exchange chamber and a steam-water separation chamber.

[0011] Furthermore, it also includes a gas-water separation port, which is arranged at the bottom of the water bath evaporator and connected to the gas-water separation chamber for discharging the separated liquid water.

[0012] Furthermore, it also includes an energy storage water tank, one end of the energy storage water tank is connected to the circulation pump, and the other end is connected to the fluid outlet, and the other end of the circulation pump is connected to the fluid inlet. A liquid level sensor and a temperature sensor are provided in the energy storage water tank for real-time monitoring of the liquid level and water temperature.

[0013] Furthermore, a filtering device is provided in the closed-loop pipeline consisting of the energy storage water tank, the circulation pump, the fluid inlet and the fluid outlet, for removing impurities in the fluid. The filtering accuracy of the filtering device is 10-50 microns.

[0014] Furthermore, the pressure threshold of the pressure relief valve is 1.2-1.5 times the system working pressure, and is linked to an external alarm device to emit an audible and visual alarm.

[0015] Furthermore, the fluid inlet, fluid outlet, pure water inlet and steam outlet all adopt standardized flanges or clamp-type quick-connect joints.

[0016] Furthermore, it also includes an adaptive control unit, which is electrically connected to the liquid level sensor, temperature sensor circulation pump and pressure relief valve respectively. The adaptive control unit has a built-in preset parameter library for automatically adjusting the power of the circulation pump and the pressure threshold of the pressure relief valve according to the flow and temperature of the fluid inlet.

[0017] In a second aspect, the present invention provides a steam generating method of the water storage type water bath steam generator according to any one of the above items, comprising:

[0018] The high-temperature fluid is fed into the heat exchange chamber of the water bath evaporator through the fluid inlet by a circulating pump, and wrapped around the heat exchange coil for indirect heating;

[0019] Pure water enters the heat exchange coil through the pure water inlet and is heated and vaporized to form saturated steam. The produced saturated steam enters the steam-water separation chamber for separation and is discharged from the saturated steam outlet. Alternatively, it enters the steam-water separation chamber for separation and then enters the superheating tube for secondary superheating to form superheated steam, which then enters the superheating chamber and is discharged from the superheated steam outlet.

[0020] Among them, the pressure relief valve automatically releases pressure when the cavity pressure exceeds the threshold, and serves as a discharge bypass to discharge the non-condensable steam generated during the heat exchange process.

[0021] Furthermore, the method also includes: real-time monitoring of the liquid level height and water temperature through a liquid level sensor and a temperature sensor provided in the energy storage water tank; adjusting the power of the circulation pump or starting drainage according to the liquid level rising rate and the water temperature change trend; when the liquid level reaches the upper limit and the water temperature is greater than the set threshold, synchronously opening the gas-water separation port and the preset cooling bypass valve on the energy storage water tank to forcibly drain the high-temperature water and inject the low-temperature water supply source.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention provides a water-storage water bath steam generator and a steam generation method thereof, which realizes water bath heating through a heat exchange coil, has no open flame combustion, has near-zero nitrogen oxide emissions, has a high waste heat recovery rate, and the water bath medium isolates the heating element from direct contact with steam;

[0024] 2. Water energy storage technology can quickly store stable thermal energy and output stable steam in real time, enabling immediate use. During periods of low grid load (such as at night), low-cost electricity is used to heat water and store thermal energy, releasing steam during peak periods, significantly reducing electricity costs.

[0025] 3. The steam generating structure of the present invention can generate high-quality saturated steam and superheated steam at the same time. The steam quality can reach more than 98%. Saturated and superheated steam are optional, which can meet the steam requirements of various industrial productions.

[0026] 4. The water storage water bath structure has no explosion risk, no dry burning risk, is safe and environmentally friendly, and has a high energy saving rate;

[0027] 5. The design of the pressure relief valve can release the pressure in the cavity in time, making the pressure in the cavity adjustable in real time while increasing safety. It can also serve as a discharge bypass to discharge the non-condensable steam generated during the heat exchange process, avoiding problems such as pipeline oxidation and corrosion.

[0028] 6. The steam-water separator can effectively isolate the water body and form different chambers to achieve different functions, so that it can produce dry saturated and superheated steam and reduce the amount of water carried;

[0029] 7. The present invention adopts a modular integrated design, and the fluid inlet, fluid outlet, pure water inlet and steam outlet all use standardized flanges or clamp-type quick-connect connectors; and is equipped with an adaptive control unit: a built-in preset parameter library, which automatically adjusts the circulation pump power and pressure relief valve threshold according to the flow and temperature of the connected pipeline, without the need for manual calibration; it can be used immediately and produce stable steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of a water storage type water bath steam generator provided by an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of the connection between the fluid circulation unit and the bath steam generator provided by an embodiment of the present invention.

[0032] In the figure: 1. Water bath evaporator; 2. Heat exchange coil; 3. Fluid inlet; 4. Fluid outlet; 5. Pure water inlet; 6. Saturated steam outlet; 7. Pressure relief valve; 8. Gas-water separation port; 9. Steam-water partition; 10. Superheated steam outlet; 11. Heat inlet chamber; 12. Superheat pipe; 13. Heat exchange chamber; 14. Steam-water separation chamber; 15. Superheat chamber; 16. Circulating pump; 17. Energy storage water tank; 18. Liquid level sensor; 19. Temperature sensor. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] Example 1, as Figure 1As shown, this embodiment introduces a water storage type water bath steam generator, including: a water bath evaporator 1, a circulating pump 16, a steam-water partition 9, a pressure relief valve 7, and a gas-water separation port 8. The water bath evaporator 1 is provided with a heat inlet chamber 11 and a superheating chamber 15 on the top, a heat exchange chamber 13 in the middle, and a steam-water separation chamber 14 at the bottom. A heat exchange coil 2 and a superheating pipe 12 are provided inside the heat exchange chamber 13, and a fluid inlet 3 and a fluid outlet 4 are provided outside the heat exchange chamber 13. The two ends of the heat exchange coil 2 are respectively connected to the heat inlet chamber 11 and the steam-water separation chamber 14, and the two ends of the superheating pipe 12 are respectively connected to the superheating chamber 15 and the steam-water separation chamber 14; the superheating chamber 15 is provided with a superheated steam outlet 10, and the steam-water separation chamber 14 is provided with a saturated steam outlet 6; the heat inlet chamber 11 is provided with a pure water inlet Port 5; the circulating pump 16 is connected to the fluid inlet 3 and the fluid outlet 4 through a pipeline, and is used to input the high-temperature fluid into the heat exchange chamber 13 and form a closed-loop circulation; the steam-water partition 9 is installed at the top and bottom of the water bath evaporator 1, and is used to separate the cavity into the heat inlet chamber 11, the superheating chamber 15, the heat exchange chamber 13 and the steam-water separation chamber 14; the pressure relief valve 7 is arranged at the top of the water bath evaporator 1, connected to the heat inlet chamber 11, and is used to automatically relieve pressure when the cavity pressure exceeds the threshold; in addition, for the non-condensable steam generated during the heat exchange process, the pressure relief valve 7 can be used as a discharge bypass to discharge it, so that there is no need to remove the non-condensable steam in advance when the heating fluid enters; the gas-water separation port 8 is arranged at the bottom of the water bath evaporator 1, and is connected to the steam-water separation chamber 14, and is used to discharge the separated liquid water.

[0036] like Figure 2 As shown, it also includes an energy storage water tank 17, one end of the energy storage water tank 17 is connected to the circulation pump 16, and the other end is connected to the fluid outlet 4, and the other end of the circulation pump 16 is connected to the fluid inlet 3. A liquid level sensor 18 and a temperature sensor 19 are provided in the energy storage water tank 17 for real-time monitoring of the liquid level and water temperature; according to the liquid level rising rate and the water temperature change trend, the power of the circulation pump 16 is adjusted or drainage is started; when the liquid level reaches the upper limit and the water temperature is ≥200°C, the gas-water separation port 8 and the preset cooling bypass valve on the energy storage water tank 17 are opened synchronously to force the high-temperature water to be discharged and injected into the low-temperature water supply source.

[0037] The water bath evaporator 1 and heat exchange coil 2 are constructed of high-temperature and corrosion-resistant materials, such as 316L stainless steel or nickel-chromium alloy, ensuring long-term operation in high-temperature and high-pressure environments. The closed-loop pipeline, consisting of the energy storage tank 17, circulating pump 16, fluid inlet 3, and fluid outlet 4, is equipped with a filtration device. This modular self-cleaning filter enables automatic backwashing without manual intervention. The filtration accuracy of the filtration device can be adjusted according to the fluid characteristics, typically 10-50 microns, ensuring effective removal of impurities from the fluid and protecting downstream equipment. The pressure threshold of the pressure relief valve 7 is 1.2-1.5 times the system operating pressure. In this design, the temperature and pressure of the fluid inlet 3 are constant. During the heat exchange process, if the inlet temperature rises too high, causing the pressure to rise, the pressure relief valve ensures timely and automatic pressure relief in the event of overpressure, preventing steam overheating. It also interacts with an external alarm system to generate an audible and visual alarm, ensuring no explosion risk. The pressure relief valve 7 utilizes a double-seal design to ensure leakage-free operation during normal operation and supports online maintenance and replacement. The fluid inlet 3, fluid outlet 4, pure water inlet 5 and steam outlet 6 all adopt standardized flange or clamp-type quick-connect connectors to ensure plug-and-play.

[0038] The water bath steam generator also includes an adaptive control unit, which is electrically connected to the liquid level sensor 18, the temperature sensor 19, the circulating pump 16 and the pressure relief valve 7 respectively. The adaptive control unit has a built-in preset parameter library for automatically adjusting the power of the circulating pump 16 and the pressure threshold of the pressure relief valve 7 according to the flow and temperature of the access pipeline.

[0039] During operation, high-temperature hot water is transported to the water bath evaporator 1 through the fluid inlet 3 by the circulation pump 16, entering the water bath heating stage. The high-temperature water wraps around the heat exchange coil 2, indirectly heating the pure water flowing in the tube, causing it to vaporize into steam. The vaporized steam is then output through the outlet of the heat exchange coil 2. During this process, the saturated steam produced can be discharged from the saturated steam outlet 6 through the steam-water separation chamber 14, or discharged from the superheated steam outlet 10 after being overheated by the superheated pipe 12. At this time, the output method can be selected according to the steam demand; the heat exchange coil 2 can prevent the heating element from directly contacting the steam pure water, reducing the risk of scaling. The fluid discharged through the fluid outlet 4 can continue to be input into the fluid inlet 3 through the circulation pump 16, realizing resource recycling. When the pressure in the cavity is too high, the pressure relief valve 7 located at the top of the water bath evaporator 1 automatically opens to reduce the risk of explosion.

[0040] This embodiment has the following beneficial effects:

[0041] 1. The pressure relief valve 7 is designed to discharge non-condensable steam in the steam conversion process in real time;

[0042] 2. The steam-water partition 9 can effectively isolate the water body, forming different chambers to achieve different functions, so that it can produce dry saturated and superheated steam and reduce the amount of water carried;

[0043] 3. The pressure relief valve 7 can adjust the pressure in the cavity in real time to improve safety, and can also serve as a bypass to discharge the non-condensable steam generated during the heat exchange process;

[0044] 4. Water energy storage can effectively store steam through the energy storage tank, which can quickly respond to steam demand in a short time, be ready for use, provide a stable steam supply, and effectively smooth out fluctuations in steam demand.

[0045] Example 2: This example provides a steam generation method of the water storage type water bath steam generator according to any one of Example 1, comprising:

[0046] The high-temperature fluid is fed into the heat exchange chamber 13 of the water bath evaporator 1 through the fluid inlet 3 by the circulation pump 16, and wrapped around the heat exchange coil 2 for indirect heating;

[0047] Pure water enters the heat exchange coil 2 through the pure water inlet 5 and is heated and vaporized to form saturated steam. The produced saturated steam enters the steam-water separation chamber 14 for separation and is discharged from the saturated steam outlet 6. Alternatively, it enters the steam-water separation chamber 14 for separation and enters the superheating pipe 12 for secondary superheating to form superheated steam, which then enters the superheating chamber 15 and is discharged from the superheated steam outlet 10.

[0048] The pressure relief valve 7 automatically releases pressure when the cavity pressure exceeds a threshold value, and serves as a discharge bypass to discharge the non-condensable steam generated during the heat exchange process.

[0049] The method further includes: monitoring the liquid level and water temperature in real time by means of a liquid level sensor 18 and a temperature sensor 19 provided in the energy storage water tank 17; adjusting the power of the circulation pump 16 or starting drainage according to the liquid level rising rate and the water temperature changing trend; and when the liquid level reaches an upper limit and the water temperature is greater than a set threshold, synchronously opening the gas-water separation port 8 and a preset cooling bypass valve on the energy storage water tank 17 to forcibly drain high-temperature water and inject it into a low-temperature water supply source.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A water storage type water bath steam generator, characterized in that: include: A water bath evaporator (1), wherein the water bath evaporator (1) is provided with a heat inlet chamber (11) and a superheating chamber (15) at the top, a heat exchange chamber (13) in the middle, and a steam-water separation chamber (14) at the bottom, wherein a heat exchange coil (2) and a superheating tube (12) are provided inside the heat exchange chamber (13), and a fluid inlet (3) and a fluid outlet (4) are provided outside the heat exchange chamber (13), wherein both ends of the heat exchange coil (2) are respectively connected to the heat inlet chamber (11) and the steam-water separation chamber (14), and both ends of the superheating tube (12) are respectively connected to the superheating chamber (15) and the steam-water separation chamber (14); the superheating chamber (15) is provided with a superheated steam outlet (10), and the steam-water separation chamber (14) is provided with a saturated steam outlet (6); and the heat inlet chamber (11) is provided with a pure water inlet (5); a circulation pump (16), the circulation pump (16) being connected to the fluid inlet (3) and the fluid outlet (4) via a pipeline, and being used to input the high-temperature fluid into the heat exchange chamber (13) and form a closed-loop circulation; A pressure relief valve (7), the pressure relief valve (7) being arranged at the top of the water bath evaporator (1) and connected to the heat inlet chamber (11), for automatically releasing pressure when the cavity pressure exceeds a threshold value, and serving as a discharge bypass to discharge non-condensable steam generated during the heat exchange process; The system further comprises an energy storage water tank (17), one end of the energy storage water tank (17) being connected to a circulation pump (16) and the other end being connected to a fluid outlet (4), the other end of the circulation pump (16) being connected to a fluid inlet (3), and a liquid level sensor (18) and a temperature sensor (19) being provided in the energy storage water tank (17) for real-time monitoring of the liquid level and water temperature; The device further comprises an adaptive control unit, the adaptive control unit being electrically connected to the liquid level sensor (18), the temperature sensor (19), the circulation pump (16) and the pressure relief valve (7), respectively. The adaptive control unit has a built-in preset parameter library for automatically adjusting the power of the circulation pump (16) and the pressure threshold of the pressure relief valve (7) according to the flow rate and temperature of the fluid inlet (3); It also includes a gas-water separation port (8), which is arranged at the bottom of the water bath evaporator (1) and connected to the gas-water separation chamber (14) for discharging the separated liquid water; According to the rate of increase of the liquid level and the trend of the change of the water temperature, the power of the circulation pump (16) is adjusted or drainage is started; when the liquid level reaches the upper limit and the water temperature is greater than the set threshold, the preset cooling bypass valve on the gas-water separation port (8) and the energy storage water tank (17) is opened synchronously to force the high-temperature water to be discharged and injected into the low-temperature water supply source.

2. The water storage type water bath steam generator according to claim 1, characterized in that: It also includes a steam-water separator (9), which is installed at the top and bottom of the water bath evaporator (1) and is used to separate the cavity into a heat inlet chamber (11), a superheating chamber (15), a heat exchange chamber (13) and a steam-water separation chamber (14).

3. The water storage type water bath steam generator according to claim 1, characterized in that: A filtering device is provided in the closed-loop pipeline consisting of the energy storage water tank (17), the circulating pump (16), the fluid inlet (3) and the fluid outlet (4) for removing impurities in the fluid. The filtering accuracy of the filtering device is 10-50 microns.

4. The water storage type water bath steam generator according to claim 1, characterized in that: The pressure threshold of the pressure relief valve (7) is 1.2-1.5 times the system working pressure, and is linked to an external alarm device to emit an audible and visual alarm.

5. The water storage type water bath steam generator according to claim 1, characterized in that: The fluid inlet (3), fluid outlet (4), pure water inlet (5) and steam outlet (6) all adopt standardized flange or clamp-type quick-connect joints.

6. A steam generating method of a water storage type water bath steam generator according to any one of claims 1 to 5, characterized in that: include: The high-temperature fluid is fed into the heat exchange chamber (13) of the water bath evaporator (1) through the fluid inlet (3) by a circulation pump (16), and wrapped around the heat exchange coil (2) for indirect heating; Pure water enters the heat exchange coil (2) through the pure water inlet (5) and is heated and vaporized to form saturated steam. The produced saturated steam enters the steam-water separation chamber (14) and is separated and then discharged from the saturated steam outlet (6), or enters the steam-water separation chamber (14) and is separated and then enters the superheating pipe (12) to be superheated twice to form superheated steam, and then enters the superheating chamber (15) and is discharged from the superheated steam outlet (10); The pressure relief valve (7) automatically relieves pressure when the cavity pressure exceeds a threshold value, and serves as a discharge bypass to discharge non-condensable steam generated during the heat exchange process.

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