Water energy storage type water bath steam generator and steam generation method thereof

Abstract

The invention discloses a water energy storage type water bath steam generator and a steam generation method thereof, and belongs to the technical field of steam generators, the water energy storage type water bath steam generator comprises a water bath evaporator, the top of the water bath evaporator is provided with a heat inlet chamber and an overheating chamber, the middle of the water bath evaporator is provided with a heat exchange chamber, and the bottom of the water bath evaporator is provided with a steam-water separation chamber; a heat exchange coil and a superheating pipe are arranged in the heat exchange chamber, a fluid inlet and a fluid outlet are formed in the outer part of the heat exchange chamber, a superheated steam outlet is formed in the superheating chamber, and a saturated steam outlet is formed in the steam-water separation chamber; a pure water inlet is formed in the heat inlet chamber; the circulating pump is connected with the fluid inlet and the fluid outlet through pipelines; the pressure release valve is arranged at the top of the water bath evaporator and is connected with the heat inlet chamber; a water energy storage technology is adopted, the water energy storage system can quickly release stored heat energy and generate steam in a short time, the sudden increase requirement is met, meanwhile, fluctuation of external energy input is buffered, and continuous and stable steam supply is ensured.

Description

Technical Field

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

[0002] A steam generator is a device that converts water into steam. Heat energy is transferred to water through fuel combustion, electric energy or other energy sources, causing it to evaporate into steam. Its core function is to efficiently and safely generate steam that meets requirements, and it is widely used in industries, energy, medical treatment, food processing and other fields.

[0003] As an important heat energy conversion device, the steam generator plays a key role in industrial production, power supply, energy recovery and other fields. Traditional steam generators need to generate steam by heating stored water, with a relatively slow steam production speed, usually low thermal efficiency, and mostly adopt a closed structure. Once the pressure exceeds the critical value, an explosion may occur. Due to the compact structure, it is difficult to provide enough steam-water separation space, resulting in a low steam dryness and common problems with wet steam. Wet steam will reduce the heat exchange efficiency, increase the risk of pipeline corrosion, and even affect product quality. And for the non-condensable gas generated in the steam system, it is easy to adhere to the surface of the condensation pipe to form a gas film, increasing the thermal resistance and energy consumption, and causing problems such as pipeline oxidation and corrosion. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a water energy storage type water bath steam generator and a steam generation method thereof. By adopting water energy storage technology, the water energy storage system can quickly release the stored heat energy, generate steam in a short time, meet the sudden increase in demand while buffering the fluctuations of external energy input (such as the intermittency of renewable energy), and ensure continuous and stable steam supply. And through water bath heating, there is no open flame combustion, the nitrogen oxide emissions are close to zero, the waste heat recovery rate is high, and the water bath medium isolates the direct contact between the heating element and the steam, avoiding the risk of dry burning and explosion while supporting a pressure relief valve to ensure system safety.

[0005] To achieve the above purpose, the present invention is implemented by the following technical solutions: In the first aspect, the present invention provides a water energy storage type water bath steam generator, including: A water bath evaporator, the top of the water bath evaporator is provided with a heat inlet chamber and a superheat chamber, the middle part is provided with a heat exchange chamber, the bottom is provided with a steam-water separation chamber, the inside of the heat exchange chamber is provided with a heat exchange coil and a superheat pipe, the outside of the heat exchange chamber is provided with a fluid inlet and a fluid outlet, the two ends of the heat exchange coil are respectively connected to the heat inlet chamber and the steam-water separation chamber, and the two ends of the superheat pipe are respectively connected to the superheat chamber and the steam-water separation chamber; the superheat 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; A circulation pump, which is connected to a fluid inlet and a fluid outlet through a pipeline, and is used to input high-temperature fluid into a heat exchange chamber and form a closed-loop circulation; A pressure relief valve, which is arranged at the top of the water bath evaporator and connected to the heat inlet chamber, and is used to automatically relieve pressure when the pressure in the cavity exceeds a threshold value, and discharge the non-condensable gas generated during the heat exchange process as a discharge bypass.

[0006] Furthermore, it further includes a steam-water separator plate, which is installed at the top and bottom of the water bath evaporator and is used to divide the cavity into a heat inlet chamber, a superheat chamber, a heat exchange chamber and a steam-water separation chamber.

[0007] Furthermore, it further includes a gas-water separation port, which is arranged at the bottom of the water bath evaporator and connected to the steam-water separation chamber, and is used to discharge the separated liquid water.

[0008] Furthermore, it further 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. The other end of the circulation pump is connected to the fluid inlet. A liquid level sensor and a temperature sensor are arranged in the energy storage water tank, and are used to monitor the liquid level height and water temperature in real time.

[0009] Furthermore, a filtering device is arranged in the closed-loop pipeline composed of the energy storage water tank, the circulation pump, the fluid inlet and the fluid outlet, and is used to remove impurities in the fluid. The filtering precision of the filtering device is 10 - 50 microns.

[0010] Furthermore, the pressure threshold value of the pressure relief valve is 1.2 - 1.5 times the system working pressure, and is linked with an external alarm device to give an audible and visual alarm.

[0011] Furthermore, the fluid inlet, the fluid outlet, the pure water inlet and the steam outlet all adopt standardized flanges or clamp-type quick-connect joints.

[0012] Furthermore, it further includes an adaptive control unit. The adaptive control unit is electrically connected to the liquid level sensor, the temperature sensor, the circulation pump and the pressure relief valve respectively. The adaptive control unit has a built-in preset parameter library and is used to automatically adjust the power of the circulation pump and the pressure threshold value of the pressure relief valve according to the flow rate and temperature of the fluid accessed at the fluid inlet.

[0013] In a second aspect, the present invention provides a steam generation method for the water energy storage type water bath steam generator according to any one of the foregoing, including: Input high-temperature fluid into the heat exchange chamber of the water bath evaporator through the circulation pump via the fluid inlet, and indirectly heat by wrapping the heat exchange coil; Pure water enters the heat exchange coil through the pure water inlet, is heated and vaporized to form saturated steam. The generated saturated steam enters the steam-water separation chamber, is separated, and then discharged from the saturated steam outlet, or enters the steam-water separation chamber, is separated, enters the superheat pipe for secondary superheating to form superheated steam, and then enters the superheat chamber and is discharged from the superheated steam outlet; Among them, when the pressure in the cavity exceeds the threshold value, the pressure relief valve automatically relieves the pressure, and as an exhaust bypass, it discharges the non-condensable gas generated during the heat exchange process.

[0014] Furthermore, the method further includes: through the liquid level sensor and temperature sensor arranged in the energy storage water tank, the liquid level height and water temperature are monitored in real time; according to the liquid level rising rate and the water temperature change trend, the power of the circulation pump is adjusted or drainage is started; when the liquid level reaches the upper limit and the water temperature is greater than the set threshold value, the gas-water separation port and the cooling bypass valve preset on the energy storage water tank are synchronously opened to forcibly discharge the high-temperature water and inject the low-temperature makeup water source.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The present invention provides a water energy storage type water bath steam generator and its steam generation method. Through the heat exchange coil, water bath heating is realized, there is no open flame combustion, the nitrogen oxide emission approaches zero, the waste heat recovery rate is high, and the water bath medium isolates the direct contact between the heating element and the steam; 2. The water energy storage technology can quickly store stable heat energy, output stable steam in real time, and realize instant use; during the low grid load period (such as at night), low-cost electric energy is used to heat water and store heat energy, and steam is released during the peak period, significantly reducing the electricity cost; 3. The steam generation structure of the present invention can generate high-quality saturated steam and superheated steam at the same time. The steam dryness can reach more than 98%. Saturated and superheated steam can be selected, which can meet the steam requirements of various industrial productions; 4. The water energy storage water bath structure has no explosion and dry burning risks, is safe, environmentally friendly, and has a high energy saving rate; 5. The design of the pressure relief valve can release the pressure in the cavity in time, make the pressure in the cavity adjustable in real time while increasing the safety guarantee; and as an exhaust bypass, it discharges the non-condensable gas generated during the heat exchange process, avoiding problems such as pipeline oxidation and corrosion; 6. The steam-water partition can effectively isolate the water body, form different chambers to realize different functions, make it produce dry saturated and superheated steam, and reduce the carried moisture; 7. The present invention adopts a modular integrated design. The fluid inlet, fluid outlet, pure water inlet and steam outlet all adopt standardized flanges or clamp type quick connectors; and is equipped with an adaptive control unit: an internal preset parameter library, automatically adjusts the power of the circulation pump and the pressure relief valve threshold according to the flow rate and temperature of the connected pipeline, without manual calibration; realizes instant connection and use, and outputs stable steam. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a water energy storage type water bath steam generator provided by an embodiment of the present invention; Figure 2 It is a schematic connection diagram of a fluid circulation unit and a bath steam generator provided by an embodiment of the present invention.

[0017] 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. Circulation pump; 17. Energy storage water tank; 18. Liquid level sensor; 19. Temperature sensor. Specific embodiments

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0020] Embodiment 1, as Figure 1As shown in the figure, this embodiment introduces a water energy storage type water bath steam generator, including: a water bath evaporator 1, a circulation pump 16, a steam-water separator 9, a pressure relief valve 7, a gas-water separation port 8. The top of the water bath evaporator 1 is provided with a heat inlet chamber 11 and a superheat chamber 15, the middle part is provided with a heat exchange chamber 13, and the bottom is provided with a steam-water separation chamber 14. Inside the heat exchange chamber 13, there are a heat exchange coil 2 and a superheat pipe 12. Outside the heat exchange chamber 13, there are a fluid inlet 3 and a fluid outlet 4. 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 superheat pipe 12 are respectively connected to the superheat chamber 15 and the steam-water separation chamber 14; the superheat 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 5; the circulation pump 16 is connected to the fluid inlet 3 and the fluid outlet 4 through pipelines, and is used to input high-temperature fluid into the heat exchange chamber 13 and form a closed-loop circulation; the steam-water separator 9 is installed at the top and bottom of the water bath evaporator 1, and is used to divide the cavity into a heat inlet chamber 11, a superheat chamber 15, a heat exchange chamber 13 and a steam-water separation chamber 14; the pressure relief valve 7 is arranged at the top of the water bath evaporator 1 and is 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 gas generated during the heat exchange process, the pressure relief valve 7 can be used as an exhaust bypass to discharge it. In this way, it is not necessary to pre-exclude the non-condensable gas 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.

[0021] As Figure 2 shown, it further 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. 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 arranged in the energy storage water tank 17, and are used to monitor the liquid level height and water temperature in real time; 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 ≥ 200 °C, the gas-water separation port 8 and a preset cooling bypass valve on the energy storage water tank 17 are synchronously opened to forcibly discharge the high-temperature water and inject a low-temperature makeup water source.

[0022] The water bath evaporator 1 and the heat exchange coil 2 are made of high-temperature and corrosion-resistant materials such as stainless steel 316L or nickel-chromium alloy, which can ensure long-term operation in high-temperature and high-pressure environments. A filtering device is provided in the closed-loop pipeline composed of the energy storage water tank 17, the circulation pump 16, the fluid inlet 3 and the fluid outlet 4. A modular self-cleaning filter is used, which can automatically backwash without manual intervention. The filtering accuracy of the filtering device can be adjusted according to the fluid characteristics, usually 10-50 microns, to ensure that impurities in the fluid are effectively removed and downstream equipment is protected. The pressure threshold of the pressure relief valve 7 is 1.2-1.5 times the system working pressure. In this design, the temperature and pressure at the fluid inlet 3 are constant. During the heat exchange process, when the inlet temperature is too high and the pressure rises, the pressure relief valve ensures that the pressure is automatically released in time under overpressure conditions to prevent steam overpressure and overheating. At the same time, it is linked with an external alarm device to give an audible and visual alarm to ensure no explosion risk. The pressure relief valve 7 adopts a double-seal design to ensure no leakage during normal operation and supports on-line maintenance and replacement. The fluid inlet 3, the fluid outlet 4, the pure water inlet 5 and the steam outlet 6 all adopt standardized flanges or clamp-type quick-connect joints to ensure plug-and-play.

[0023] The water bath steam generator further includes an adaptive control unit, which is 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 connected pipeline.

[0024] During operation, high-temperature hot water is transported by the circulation pump 16 through the fluid inlet 3 to the water bath evaporator 1, entering the water bath heating stage. The high-temperature water wraps the heat exchange coil 2 to indirectly heat the pure water flowing in the pipe, vaporizing it into steam, and the vaporized steam is output through the outlet of the heat exchange coil 2. During this process, the produced saturated steam 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 superheated by the superheater tube 12. At this time, the output mode 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 be continuously input into the fluid inlet 3 through the circulation pump 16 to realize 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 explosion risk.

[0025] This embodiment has the following beneficial effects: 1. The design of the pressure relief valve 7 can discharge the non-condensable gas in the steam conversion process in real time; 2. The steam-water partition 9 can effectively isolate the water body, form different chambers to achieve different functions, so that it produces dry saturated and superheated steam and reduces the carried moisture; 3. The pressure relief valve 7 can adjust the chamber pressure in real time, improve safety, and discharge the non-condensable gas generated during the heat exchange process as a bypass; 4. Water energy storage can effectively store steam through the energy storage water tank, can quickly respond to steam demand within a short time, can be used immediately when opened, provide a stable steam supply, and effectively smooth the fluctuation of steam demand.

[0026] Embodiment 2. This embodiment provides a steam generation method for the water energy storage type water bath steam generator described in any one of Embodiment 1, including: Pass the high-temperature fluid through the fluid inlet 3 into the heat exchange chamber 13 of the water bath evaporator 1 by means of the circulation pump 16, and wrap the heat exchange coil 2 for indirect heating; Pure water enters the heat exchange coil 2 through the pure water inlet 5, is heated and vaporized to form saturated steam. The produced saturated steam enters the steam-water separation chamber 14 for separation and then is discharged from the saturated steam outlet 6, or enters the steam-water separation chamber 14 for separation and then enters the superheating tube 12 for secondary superheating to form superheated steam, and then enters the superheating chamber 15 and is discharged from the superheated steam outlet 10; Among them, the pressure relief valve 7 automatically relieves pressure when the chamber pressure exceeds the threshold value, and discharges the non-condensable gas generated during the heat exchange process as an exhaust bypass.

[0027] The method further includes: through the liquid level sensor 18 and the temperature sensor 19 arranged in the energy storage water tank 17, the liquid level height and the water temperature are monitored in real time; 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 greater than the set threshold value, the gas-water separation port 8 and the cooling bypass valve preset on the energy storage water tank 17 are synchronously opened to forcibly discharge the high-temperature water and inject the low-temperature water replenishment source.

[0028] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A water energy storage type water bath steam generator, characterized in that, Comprising: A water bath evaporator (1), at the top of the water bath evaporator (1) there are a heat inlet chamber (11) and a superheat chamber (15), in the middle there is a heat exchange chamber (13), at the bottom there is a steam-water separation chamber (14). Inside the heat exchange chamber (13) there are a heat exchange coil (2) and a superheat pipe (12). Outside the heat exchange chamber (13) there are a fluid inlet (3) and a fluid outlet (4). 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). The two ends of the superheat pipe (12) are respectively connected to the superheat chamber (15) and the steam-water separation chamber (14). The superheat 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 (5); A circulation pump (16), the circulation pump (16) is connected to the fluid inlet (3) and the fluid outlet (4) through pipelines, and is used for inputting high-temperature fluid into the heat exchange chamber (13) to form a closed-loop circulation; A pressure relief valve (7), the pressure relief valve (7) is arranged at the top of the water bath evaporator (1) and is connected to the heat inlet chamber (11), and is used for automatically relieving pressure when the cavity pressure exceeds the threshold value, and is used as an exhaust bypass to discharge the non-condensable gas generated during the heat exchange process.

2. The water storage type water bath steam generator according to claim 1, characterized in that It further includes a steam-water partition plate (9), the steam-water partition plate (9) is installed at the top and bottom of the water bath evaporator (1), and is used for partitioning the cavity into a heat inlet chamber (11), a superheat 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, wherein It further includes a gas-water separation port (8), 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 for discharging the separated liquid water.

4. The water storage type water bath steam generator according to claim 3, characterized in that, It further includes an energy storage water tank (17), one end of the energy storage water tank (17) is connected to the circulation pump (16), the other end is connected to the fluid outlet (4), the other end of the circulation pump (16) is connected to the fluid inlet (3). Inside the energy storage water tank (17) there are a liquid level sensor (18) and a temperature sensor (19), which are used for real-time monitoring of the liquid level height and water temperature.

5. The water storage type water bath steam generator according to claim 4, wherein In the closed-loop pipeline composed of the energy storage water tank (17), the circulation pump (16), the fluid inlet (3) and the fluid outlet (4), there is a filtering device for removing impurities in the fluid, and the filtering precision of the filtering device is 10 - 50 microns.

6. The water storage type water bath steam generator according to claim 1, wherein The pressure threshold value of the pressure relief valve (7) is 1.2 - 1.5 times the system working pressure, and is linked with an external alarm device to give an audible and visual alarm.

7. The water storage type water bath steam generator according to claim 1, wherein The fluid inlet (3), the fluid outlet (4), the pure water inlet (5) and the steam outlet (6) all adopt standardized flanges or clamp-type quick-connect joints.

8. The water storage type water bath steam generator according to claim 4, characterized in that, It further includes an adaptive control unit, the adaptive control unit is respectively electrically connected to the liquid level sensor (18), the temperature sensor (19), the circulation pump (16) and the pressure relief valve (7). The adaptive control unit has a built-in preset parameter library, and is used for automatically adjusting the power of the circulation pump (16) and the pressure threshold value of the pressure relief valve (7) according to the flow rate and temperature of the fluid accessing the fluid inlet (3).

9. A method for generating steam of the water energy storage type water bath steam generator according to any one of claims 1-8, characterized in that, Comprising: The high-temperature fluid is input into the heat exchange chamber (13) of the water bath evaporator (1) through the fluid inlet (3) by a circulating pump (16) and indirectly heated by wrapping the heat exchange coil (2). Pure water enters the heat exchange coil (2) through the pure water inlet (5), is vaporized by heat to form saturated steam, and the produced saturated steam enters the steam-water separation chamber (14), is separated and discharged from the saturated steam outlet (6), or enters the superheat tube (12) after being separated in the steam-water separation chamber (14) for secondary superheating to form superheated steam, and then enters the superheat chamber (15) and is discharged from the superheated steam outlet (10). Among them, when the chamber pressure exceeds the threshold, the pressure relief valve (7) automatically relieves the pressure and discharges the non-condensable gas generated during the heat exchange process as an exhaust bypass.

10. The steam generation method according to claim 9, characterized in that, The method further includes: real-time monitoring of the liquid level height and water temperature through the liquid level sensor (18) and temperature sensor (19) provided in the energy storage water tank (17); adjusting the power of the circulating pump (16) 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 (8) and the cooling bypass valve preset on the energy storage water tank (17) to forcibly discharge the high-temperature water and inject the low-temperature makeup water source.

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