CN111692580B - High-temperature heat storage steam generation adjusting device and working method thereof - Google Patents
High-temperature heat storage steam generation adjusting device and working method thereof Download PDFInfo
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- CN111692580B CN111692580B CN202010433825.8A CN202010433825A CN111692580B CN 111692580 B CN111692580 B CN 111692580B CN 202010433825 A CN202010433825 A CN 202010433825A CN 111692580 B CN111692580 B CN 111692580B
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- 238000005338 heat storage Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 191
- 230000001105 regulatory effect Effects 0.000 claims abstract description 117
- 238000005485 electric heating Methods 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 230000001502 supplementing effect Effects 0.000 claims abstract description 22
- 230000001276 controlling effect Effects 0.000 claims abstract description 16
- 229920006395 saturated elastomer Polymers 0.000 claims description 30
- 238000012544 monitoring process Methods 0.000 claims description 17
- 230000009467 reduction Effects 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000001603 reducing effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 2
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- 238000012271 agricultural production Methods 0.000 description 1
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- 238000010248 power generation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/028—Steam generation using heat accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
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Abstract
The invention discloses a high-temperature heat storage steam generation regulating device and a working method thereof, wherein the device comprises a high-temperature heat storage module, a steam generation module and a steam regulating system; electric heating pipes are uniformly distributed in the heat accumulator; the coil pipe is coiled in the heat accumulator, the inlet of the coil pipe is positioned at the lower part of the heat accumulator, and the outlet of the coil pipe is positioned at the upper part of the heat accumulator; the water bath type desuperheater stores water with a set liquid level; the water outlet at the lower part of the water bath type desuperheater is communicated with the inlet of the coil pipe through a pipeline; the water outlet of the water supplementing tank is communicated with the inlet of the coil pipe through one pipeline of the water pump, and the other pipeline is communicated with the water supplementing port at the bottom of the water bath type desuperheater; an air inlet at the upper part of the water bath type desuperheater is communicated with an outlet of the coil pipe through a pipeline and is communicated to a diverter in the water bath type desuperheater; the air outlet at the upper part of the water bath type attemperator is communicated with the inlet of the steam-water separator through a pipeline, and a fourth electric regulating valve for controlling the opening degree is arranged at the steam outlet of the steam-water separator.
Description
Technical Field
The invention relates to a high-temperature heat storage steam generation adjusting device and a working method thereof.
Background
The solar energy and the wind energy have the characteristics of rich resources, cleanness and no pollution, and have a particularly important effect on solving the energy crisis and the environmental problem. However, solar energy and wind energy have intermittence and instability, and are difficult to meet the requirement of industrial large-scale continuous stable energy supply, so that the efficient heat storage technology must be developed to effectively solve the problems of wind, light and electricity storage and use.
The peak-valley difference of the power grid is gradually increased, and the contradiction between the peak regulation capacity of the power grid and the objective peak regulation requirement is very sharp. With the sequential production and power generation of the power stations established in the two years and the national restrictions of macroscopic economy regulation and control and high energy consumption enterprises, the problem of lack of peak regulation means in the low valley period is more remarkable. The low-price valley electricity power is stored by using the heat storage technology, and the peak shaving of the power grid is performed, so that the method has great significance.
The high-temperature heat accumulation and steam production are important forms for large-scale utilization of wind-light electricity and low-price valley electricity. Therefore, the high-quality steam is generated by high-efficiency heat accumulation and stable output of the heat accumulator, can be widely applied to the fields of electric power peak regulation, building heat supply, industrial and agricultural production heat and the like, and has very broad market prospect. However, no heat accumulator steam prototype capable of producing saturated steam and superheated steam with set superheat degree under different pressures exists at present.
Disclosure of Invention
The purpose is as follows: in order to overcome the defects in the prior art, the invention provides a high-temperature heat storage steam generation adjusting device and a working method thereof, which can produce saturated steam under different pressures and superheated steam with a set superheat degree. The energy sources such as wind, light, electricity of low price valley and the like are stored through the heat accumulator, and stable high-quality steam is produced when needed.
The invention adopts the technical scheme that:
A high-temperature heat storage steam generation adjusting device comprises a high-temperature heat storage module, a steam generation module and a steam adjusting system; the high-temperature heat storage module comprises a shell, a heat accumulator and an electric heating pipe; the steam generation module comprises a coil pipe and a first electric regulating valve; the steam regulating system comprises a water bath type desuperheater, a steam-water separator, a water supplementing tank, a water pump, a second electric regulating valve and a third electric regulating valve;
The heat accumulator is arranged in the shell, and electric heating pipes are uniformly distributed in the heat accumulator; the coil pipe is coiled in the heat accumulator, the inlet of the coil pipe is positioned at the lower part of the heat accumulator, and the outlet of the coil pipe is positioned at the upper part of the heat accumulator;
The water bath type desuperheater is provided with a diverter, wherein water with a set liquid level is stored in the water bath type desuperheater; the water outlet at the lower part of the water bath type desuperheater is communicated with the inlet of the coil pipe through a pipeline and is provided with a first electric regulating valve for controlling the opening and closing of the pipeline;
the water outlet of the water supplementing tank is communicated with the inlet of the coil pipe through one pipeline of the water pump, a second electric regulating valve for controlling the pipeline to be opened and closed is arranged, and the other pipeline is communicated with the water supplementing port at the bottom of the water bath type desuperheater and a third electric regulating valve for controlling the pipeline to be opened and closed is arranged;
an air inlet at the upper part of the water bath type desuperheater is communicated with an outlet of the coil pipe through a pipeline and is communicated with a flow divider in the water bath type desuperheater, so that superheated steam generated by the high-temperature heat storage module is uniformly contacted with water in the water bath type desuperheater, and the effects of reducing temperature and pressure are achieved;
the air outlet at the upper part of the water bath type attemperator is communicated with the inlet of the steam-water separator through a pipeline, and a fourth electric regulating valve for controlling the opening degree is arranged at the steam outlet of the steam-water separator; the water outlet at the bottom of the steam-water separator is communicated and reflowed to the water bath type desuperheater through a pipeline, and a second drain valve is arranged.
In some embodiments, the upper part of the water bath type desuperheater is also provided with an overflow port, and a first drain valve is arranged at the overflow port and used for automatically overflowing through the first drain valve when the liquid level is too high.
Further, a stop valve is arranged between the overflow port and the first drain valve.
In some embodiments, an electric ball valve is arranged at the water inlet of the water supplementing tank.
In some embodiments, the heat storages are arranged in layers, and electric heating pipes and thermocouples for monitoring the temperature of the heat storages are uniformly distributed in each layer of heat storages;
The coils are layered and coiled, each layer of coil is arranged between two layers of heat accumulator bodies, and the coils of each layer are communicated.
Further, the heat accumulator is divided into five layers, and each layer is provided with three electric heating pipes and two thermocouples; the coil pipes are four layers in total, and each layer of coil pipe is arranged between two layers of heat storages.
In some embodiments, the shell is of steel plate structure, and an insulating layer is arranged on the inner wall of the shell.
In some embodiments, the high-temperature heat storage steam generation regulating device comprises an automatic control system, wherein a thermocouple for monitoring the temperature of the heat storage body is arranged in the heat storage body; a first temperature sensor and a first pressure sensor are arranged at the outlet of the coil pipe and are used for monitoring the temperature and the pressure of water vapor at the outlet of the coil pipe; a second temperature sensor and a second pressure sensor are arranged at the steam outlet of the steam-water separator and are used for monitoring the temperature and the pressure of dry saturated steam at the steam outlet of the steam-water separator;
The thermocouple, the first temperature sensor, the first pressure sensor, the second temperature sensor and the second pressure sensor are all connected with an automatic control system, and the electric heating pipe, the first electric regulating valve, the second electric regulating valve, the fourth electric regulating valve, the water pump, the second electric regulating valve and the third electric regulating valve are all connected with the automatic control system, and the automatic control system controls the switch and the opening;
The automatic control system receives monitoring information of the thermocouple, the first temperature sensor, the first pressure sensor, the second temperature sensor and the second pressure sensor, and automatically controls the opening and closing of the electric heating pipe, the first electric regulating valve, the second electric regulating valve, the fourth electric regulating valve, the water pump, the second electric regulating valve and the third electric regulating valve according to the working mode setting.
In a second aspect, a working method of the high-temperature heat storage steam generation adjusting device is provided, which comprises the following steps:
When the high-temperature heat storage module stores heat, the automatic control system is used for controlling the temperature rise of the heat storage body and the start and stop of the electric heating pipe; when the electric heating pipe is over-temperature, the electric heating pipe is closed, and when the temperature of the electric heating pipe is lower than a set value, the electric heating pipe is automatically opened; when the temperature of the heat storage body reaches a set value, the electric heating pipe stops heating, and the temperature of the electric heating pipe and the temperature of the heat storage body in the heat storage process are recorded;
when the high-temperature heat storage steam generation adjusting device releases heat and outputs steam, the automatic control system controls the first electric adjusting valve, the second electric adjusting valve, the water pump and the fourth electric adjusting valve to start and stop: when the heat is released, the first electric regulating valve or the second electric regulating valve is opened, and when the overheat steam at the outlet of the coil pipe exceeds the temperature and the overpressure, the first electric regulating valve or the second electric regulating valve is closed;
the water supplementing tank maintains the liquid level of the water bath type desuperheater to be constant through the water pump, when the liquid level reaches a set value, the water pump is closed, and when the liquid level is lower than the set value, the water pump is opened;
The opening of the fourth electric regulating valve is controlled at the steam outlet of the steam-water separator through PID, when the steam reaches the set pressure, the fourth electric regulating valve is opened, when the pressure is reduced, the opening of the fourth electric regulating valve is reduced, and when the pressure is increased, the opening of the fourth electric regulating valve is increased; when the pressure is reduced to the set minimum value, the fourth electric regulating valve is closed;
When the heat accumulator is below the set low temperature, the heat release is completed.
The working method of the high-temperature heat storage steam generation regulating device comprises the following steps: a natural circulation mode and a forced circulation mode, wherein the natural circulation mode and the forced circulation mode can be automatically switched; the water supplementing tank maintains a constant liquid level for the water bath type desuperheater through a water pump by a third electric regulating valve, different liquid level heights are set according to the parameters of the required superheated steam or saturated steam, and when the liquid level is too high, the water supplementing tank overflows through a first drain valve automatically;
When the natural circulation mode is operated, the liquid level of the water bath type desuperheater is constant, the first electric regulating valve is opened, water enters the steam generating module under the action of gravity to generate superheated steam, and the superheated steam enters the water bath type desuperheater to perform temperature and pressure reduction; the liquid level of the water bath type desuperheater is set and adjusted, so that the temperature reduction effect is changed, and superheated steam or saturated steam with different superheat degrees under set pressure can be generated; the saturated steam passes through a steam-water separator to generate dry saturated steam with certain dryness;
when the forced circulation mode is operated, the liquid level of the water bath type desuperheater is constant, the second electric regulating valve is opened, the water pump conveys water into the steam generating module to generate superheated steam, and the superheated steam enters the water bath type desuperheater for temperature reduction and pressure reduction; the liquid level of the water bath type desuperheater is set and adjusted, so that the temperature reduction effect is changed, and superheated steam or saturated steam with different superheat degrees under set pressure can be generated; the saturated steam passes through a steam-water separator to generate dry saturated steam with certain dryness.
The beneficial effects are that: compared with the prior art, the high-temperature heat storage steam generation adjusting device and the working method thereof have the following advantages:
Saturated steam at different pressures and superheated steam with a set degree of superheat can be produced. The energy sources such as wind, light, electricity of low price valley and the like are stored through the heat accumulator, and stable high-quality steam is produced when needed.
The steam generation module and the steam conditioning system are designed. The steam generation module may be operated in a natural circulation and forced circulation mode. When the heat storage temperature is higher, a natural circulation operation mode can be selected, so that the cold and hot impact of inlet water on the coil pipe is slowed down. When the temperature of the heat accumulator is lower, the forced circulation mode is automatically switched, so that the output of high-quality set parameter steam is ensured. In the steam regulating system, the water supplementing pump provides stable water level for the desuperheater, and the superheated steam or saturated steam with different superheat degrees under set pressure can be generated by regulating the liquid level height of the desuperheater and changing the temperature reducing effect. The temperature of the heat accumulator, the steam pressure and the liquid level of the desuperheater are controlled by an accurate automatic control system, so that the operation safety of equipment is ensured, and the efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a high-temperature heat storage steam generation regulating device according to an embodiment;
In the figure: the device comprises a shell 1, a heat accumulator 2, an electric heating pipe 3, a coil 4, a first temperature sensor 5, a first pressure sensor 6, a water bath type desuperheater 7, a steam-water separator 8, a second temperature sensor 9, a second pressure sensor 10, a fourth electric regulating valve 11, a shunt 12, a second electric regulating valve 13, a third electric regulating valve 14, a water pump 15, an electric ball valve 16, a water tank 17, a stop valve 18, a first drain valve 19, a second drain valve 20, a first electric regulating valve 21 and a thermocouple 22.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Example 1
As shown in fig. 1, a high-temperature heat storage steam generation regulating device comprises a high-temperature heat storage module, a steam generation module and a steam regulating system; the high-temperature heat storage module comprises a shell 1, a heat accumulator 2 and an electric heating pipe 3; the steam generation module comprises a coil pipe 4 and a first electric regulating valve 21; the steam regulating system comprises a water bath type desuperheater 7, a steam-water separator 8, a water supplementing tank 17, a water pump 15, a second electric regulating valve 13 and a third electric regulating valve 14;
The heat accumulator 2 is arranged in the shell 1, and electric heating pipes 3 are uniformly distributed in the heat accumulator 2; the coil pipe 4 is coiled in the heat accumulator 2, the inlet of the coil pipe 4 is positioned at the lower part of the heat accumulator 2, and the outlet of the coil pipe 4 is positioned at the upper part of the heat accumulator 2;
the water bath type desuperheater 7 stores water with a set liquid level and is provided with a diverter 12; the water outlet at the lower part of the water bath type desuperheater 7 is communicated with the inlet of the coil pipe 4 through a pipeline and is provided with a first electric regulating valve 21 for controlling the opening and closing of the pipeline;
The water outlet of the water supplementing tank 17 is communicated with the inlet of the coil pipe 4 through one pipeline of the water pump 15, a second electric regulating valve 13 for controlling the pipeline to be opened and closed is arranged, the other pipeline is communicated with the water supplementing port at the bottom of the water bath type desuperheater 7, and a third electric regulating valve 14 for controlling the pipeline to be opened and closed is arranged;
The outlet of the coil pipe 4 is provided with a first temperature sensor 5 and a first pressure sensor 6 which are used for monitoring the temperature and the pressure of water vapor at the outlet of the coil pipe 4, an air inlet at the upper part of the water bath type desuperheater 7 is communicated with the outlet of the coil pipe 4 through a pipeline and is communicated to a diverter 12 in the water bath type desuperheater 7, so that superheated vapor generated by the high-temperature heat storage module is uniformly contacted with water in the water bath type desuperheater 7, and the effects of temperature reduction and pressure reduction are achieved;
The air outlet at the upper part of the water bath type desuperheater 7 is communicated with the inlet of the steam-water separator 8 through a pipeline, and a second temperature sensor 9, a second pressure sensor 10 and a fourth electric regulating valve 11 for controlling the opening degree are arranged at the steam outlet of the steam-water separator 8 and used for monitoring the temperature and the pressure of dry saturated steam at the air outlet of the steam-water separator; the water outlet at the bottom of the steam-water separator 8 is communicated and reflowed to the water bath type attemperator 7 through a pipeline, and a second drain valve 20 is arranged.
In some embodiments, the upper part of the water bath type desuperheater 7 is also provided with an overflow port, and a first drain valve 19 is arranged at the overflow port for automatically overflowing through the first drain valve 19 when the liquid level is too high. The water supplementing tank 17 maintains a constant liquid level for the water bath type desuperheater 7 through the water pump 15 and the third electric regulating valve 14, different liquid level heights are set according to the parameters of the required superheated steam or saturated steam, and when the liquid level is too high, the water is overflowed automatically through the first drain valve 19.
Further, a stop valve 18 is arranged between the overflow port and the first drain valve 19.
In some embodiments, an electrically operated ball valve 16 is provided at the water inlet of the water replenishment tank 17.
In some embodiments, the heat storages 2 are arranged in layers, and the electric heating pipes 3 and the thermocouples 22 for monitoring the temperature of the heat storages 2 are uniformly distributed in each layer of heat storages 2;
the coils 4 are layered, each layer of coils is arranged between the two layers of heat accumulators, and the coils of each layer are communicated.
Further, as shown in fig. 1, the heat accumulator 2 is divided into five layers, each layer having three electric heating pipes 3 and two thermocouples 22; and setting the heat storage temperature of the heat storage body through an automatic control system, and automatically powering off and recording the heat storage body temperature and the electric heating pipe temperature in the heating process when the heat storage temperature reaches a set value. The coil pipes are four layers in total, and each layer of coil pipe is arranged between two layers of heat storages. When releasing heat, a natural circulation mode and a forced circulation mode of the water pump can be selected. When the initial heat release is carried out, the temperature of the heat storage is higher, the operation can be carried out in a natural circulation mode, the first electric regulating valve 21 is opened, water in the water bath type desuperheater 7 enters the first layer of coil pipe to carry out strong heat exchange under the action of gravity, steam is generated, and then the second, third and fourth layers of coil pipes are gradually heated into superheated steam. By means of an automatic control system, the outlet steam pressure, temperature are recorded, and when the excess temperature and the excess pressure are exceeded, the first electrically operated regulator valve 21 is closed. The natural circulation mode can reduce the cold and hot impact of the coil; in the middle and later stages of heat release, the temperature of the heat storage is low, a forced circulation mode of the water pump can be selectively switched, the first electric regulating valve 21 is closed, and the second electric regulating valve 13 is opened.
In some embodiments, the housing 1 is a steel plate structure, and an insulation layer is disposed on an inner wall of the housing 1.
In some embodiments, the high-temperature heat storage steam generation regulating device comprises an automatic control system, wherein a thermocouple 22 for monitoring the temperature of the heat storage body is arranged in the heat storage body 2; a first temperature sensor 5 and a first pressure sensor 6 are arranged at the outlet of the coil pipe 4 and are used for monitoring the temperature and the pressure of water vapor at the outlet of the coil pipe 4; a second temperature sensor 9 and a second pressure sensor 10 are arranged at the steam outlet of the steam-water separator 8 and are used for monitoring the temperature and pressure of dry saturated steam at the steam outlet of the steam-water separator;
the thermocouple 22, the first temperature sensor 5, the first pressure sensor 6, the second temperature sensor 9 and the second pressure sensor 10 are all connected with an automatic control system, and the electric heating pipe 3, the first electric regulating valve 21, the second electric regulating valve 13, the fourth electric regulating valve 11, the water pump 15, the second electric regulating valve 13 and the third electric regulating valve 14 are all connected with the automatic control system, and the automatic control system controls the switch and the opening;
The automatic control system receives the monitoring information of the thermocouple 22, the first temperature sensor 5, the first pressure sensor 6, the second temperature sensor 9 and the second pressure sensor 10, and automatically controls the opening and closing of the electric heating pipe 3, the first electric regulating valve 21, the second electric regulating valve 13, the fourth electric regulating valve 11, the water pump 15, the second electric regulating valve 13 and the third electric regulating valve 14 according to the working mode setting.
Example 2
The working method of the high-temperature heat storage steam generation regulating device is characterized by comprising the following steps of:
When the high-temperature heat storage module stores heat, the automatic control system is used for controlling the temperature rise of the heat storage body 2 and the start and stop of the electric heating pipe 3; when the electric heating pipe is over-temperature, the electric heating pipe is closed, and when the temperature of the electric heating pipe is lower than a set value, the electric heating pipe is automatically opened; when the temperature of the heat storage body reaches a set value, the electric heating pipe stops heating, and the temperature of the electric heating pipe and the temperature of the heat storage body in the heat storage process are recorded;
When the high-temperature heat storage steam generation adjusting device releases heat and outputs steam, the automatic control system controls the first electric adjusting valve 21, the second electric adjusting valve 13, the water pump 15 and the fourth electric adjusting valve 11 to start and stop: when the heat is released, the first electric regulating valve 21 or the second electric regulating valve 13 is opened, and when the overheat steam at the outlet of the coil pipe 4 is overtemperature and overpressure, the first electric regulating valve 21 or the second electric regulating valve 13 is closed;
The water supplementing tank maintains the liquid level of the water bath type desuperheater to be constant through the water pump 15, when the liquid level reaches a set value, the water pump 15 is closed, and when the liquid level is lower than the set value, the water pump is opened;
The opening of the fourth electric regulating valve 11 is controlled at the steam outlet of the steam-water separator through PID, when the steam reaches the set pressure, the fourth electric regulating valve 11 is opened, when the pressure is reduced, the opening of the fourth electric regulating valve 11 is reduced, and when the pressure is increased, the opening of the fourth electric regulating valve 11 is increased; when the pressure decreases to the set minimum value, the fourth electric regulator valve 11 is closed;
when the heat accumulator is below the set low temperature, the heat release is completed. The automatic control system records the superheated steam, the outlet steam temperature, the pressure value and the corresponding time points.
The working method of the high-temperature heat storage steam generation regulating device comprises the following steps: a natural circulation mode and a forced circulation mode, wherein the natural circulation mode and the forced circulation mode can be automatically switched; the water supplementing tank 17 maintains a constant liquid level for the water bath type desuperheater 7 through the water pump 15 and the third electric regulating valve 14, different liquid level heights are set according to the parameters of the required superheated steam or saturated steam, and when the liquid level is too high, the water automatically overflows through the first drain valve 19;
in some embodiments, the following is specific:
During heat storage, the highest temperature Ta of the heat accumulator 2 and the highest temperature Tb of the electric heating tube 3 are set. When the temperature of the heat accumulator 2 is lower than Ta, heating is started; when the temperature is higher than Ta, the heating is stopped. When the temperature of the electric heating tube 3 is higher than Tb during heating, the electric heating tube 3 is turned off, and when the temperature is lower than Tb, the electric heating tube 3 is turned on.
When the natural circulation mode is operated, the liquid level of the water bath type desuperheater 7 is constant, the first electric regulating valve 21 is opened, water enters the steam generating module under the action of gravity to generate superheated steam, and the superheated steam enters the water bath type desuperheater 7 for temperature and pressure reduction; the liquid level of the water bath type desuperheater is set and adjusted, so that the temperature reduction effect is changed, and superheated steam or saturated steam with different superheat degrees under set pressure can be generated; the saturated steam passes through a steam-water separator 8 to generate dry saturated steam with a certain dryness;
When the forced circulation mode is operated, the liquid level of the water bath type desuperheater 7 is constant, the second electric regulating valve 13 is opened, the water pump 15 conveys water into the steam generating module to generate superheated steam, and the superheated steam enters the water bath type desuperheater 7 for temperature and pressure reduction; the liquid level of the water bath type desuperheater is set and adjusted, so that the temperature reduction effect is changed, and superheated steam or saturated steam with different superheat degrees under set pressure can be generated; the saturated steam passes through a steam-water separator 8 to generate dry saturated steam with a certain dryness.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present application.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (8)
1. The high-temperature heat storage steam generation adjusting device is characterized by comprising a high-temperature heat storage module, a steam generation module and a steam adjusting system; the high-temperature heat storage module comprises a shell (1), a heat accumulator (2) and an electric heating pipe (3); the steam generation module comprises a coil pipe (4) and a first electric regulating valve (21); the steam regulating system comprises a water bath type desuperheater (7), a steam-water separator (8), a water supplementing tank (17), a water pump (15), a second electric regulating valve (13) and a third electric regulating valve (14); the heat accumulator (2) is arranged in the shell (1), and electric heating pipes (3) are uniformly distributed in the heat accumulator (2); the coil pipe (4) is arranged in the heat accumulator (2) in a coiled manner, an inlet of the coil pipe (4) is positioned at the lower part of the heat accumulator (2), and an outlet of the coil pipe (4) is positioned at the upper part of the heat accumulator (2); the water bath type desuperheater (7) is provided with a diverter (12) and stores water with a set liquid level; the water outlet at the lower part of the water bath type desuperheater (7) is communicated with the inlet of the coil pipe (4) through a pipeline, and a first electric regulating valve (21) for controlling the opening and closing of the pipeline is arranged; the water outlet of the water supplementing tank (17) is communicated with the inlet of the coil pipe (4) through one pipeline of the water pump (15), a second electric regulating valve (13) for controlling the pipeline to be opened and closed is arranged, the other pipeline is communicated with the water supplementing port at the bottom of the water bath type desuperheater (7), and a third electric regulating valve (14) for controlling the pipeline to be opened and closed is arranged; an air inlet at the upper part of the water bath type desuperheater (7) is communicated with an outlet of the coil pipe (4) through a pipeline and is communicated to a flow divider (12) in the water bath type desuperheater (7), so that superheated steam generated by the high-temperature heat storage module is uniformly contacted with water in the water bath type desuperheater (7), and the effects of reducing temperature and pressure are achieved; an air outlet at the upper part of the water bath type attemperator (7) is communicated with an inlet of a steam-water separator (8) through a pipeline, and a fourth electric regulating valve (11) for controlling the opening degree is arranged at a steam outlet of the steam-water separator (8); the water outlet at the bottom of the steam-water separator (8) is communicated and flows back to the water bath type attemperator (7) through a pipeline, and a second drain valve (20) is arranged; the heat storages (2) are arranged in layers, and electric heating pipes (3) and thermocouples (22) for monitoring the temperature of the heat storages are uniformly distributed in each layer of heat storages (2); the coils (4) are layered, each layer of coil is arranged between two layers of heat storages, and the coils of each layer are communicated;
The automatic heat accumulator further comprises an automatic control system, wherein a thermocouple (22) for monitoring the temperature of the heat accumulator is arranged in the heat accumulator (2); a first temperature sensor (5) and a first pressure sensor (6) are arranged at the outlet of the coil pipe (4) and are used for monitoring the temperature and the pressure of water vapor at the outlet of the coil pipe (4); a second temperature sensor (9) and a second pressure sensor (10) are arranged at the steam outlet of the steam-water separator (8) and are used for monitoring the temperature and pressure of dry saturated steam at the steam outlet of the steam-water separator;
The electric heating pipe (3), the first electric regulating valve (21), the second electric regulating valve (13), the fourth electric regulating valve (11), the water pump (15), the second electric regulating valve (13) and the third electric regulating valve (14) are all connected with an automatic control system, and the automatic control system controls the switch and the opening;
The automatic control system receives monitoring information of the thermocouple (22), the first temperature sensor (5), the first pressure sensor (6), the second temperature sensor (9) and the second pressure sensor (10), and automatically controls the switch and the opening of the electric heating pipe (3), the first electric regulating valve (21), the second electric regulating valve (13), the fourth electric regulating valve (11), the water pump (15), the second electric regulating valve (13) and the third electric regulating valve (14) according to the working mode.
2. The high-temperature heat storage steam generation regulating device according to claim 1, wherein the upper part of the water bath type attemperator (7) is further provided with an overflow port, and a first drain valve (19) is arranged at the overflow port and is used for automatically overflowing through the first drain valve (19) when the liquid level is too high.
3. The high-temperature heat storage steam generation regulating device according to claim 2, wherein a stop valve (18) is further arranged between the overflow port and the first drain valve (19).
4. The high-temperature heat storage steam generation regulating device according to claim 1, wherein an electric ball valve (16) is arranged at the water inlet of the water supplementing tank (17).
5. The high-temperature heat-accumulating steam generation regulating device according to claim 1, characterized in that the heat accumulator (2) is divided into five layers, each layer having three electric heating pipes (3) and two thermocouples (22); the coil pipes are four layers in total, and each layer of coil pipe is arranged between two layers of heat storages.
6. The high-temperature heat storage steam generation regulating device according to claim 1, wherein the shell (1) is of a steel plate structure, and an insulating layer is arranged on the inner wall of the shell (1).
7. A method of operating a high temperature heat accumulating steam generating regulating device as set forth in any one of claims 1 to 6, comprising:
When the high-temperature heat storage module stores heat, the automatic control system is used for controlling the temperature rise of the heat storage body (2) and the start and stop of the electric heating pipe (3); when the electric heating pipe is over-temperature, the electric heating pipe is closed, and when the temperature of the electric heating pipe is lower than a set value, the electric heating pipe is automatically opened; when the temperature of the heat storage body reaches a set value, the electric heating pipe stops heating, and the temperature of the electric heating pipe and the temperature of the heat storage body in the heat storage process are recorded;
When the high-temperature heat storage steam generation adjusting device releases heat and outputs steam, the automatic control system controls the first electric adjusting valve (21), the second electric adjusting valve (13), the water pump (15) and the fourth electric adjusting valve (11) to start and stop: when the heat is released, the first electric regulating valve (21) or the second electric regulating valve (13) is opened, and when the overheat steam at the outlet of the coil pipe (4) is overtemperature and overpressure, the first electric regulating valve (21) or the second electric regulating valve (13) is closed;
The water supplementing tank maintains the liquid level of the water bath type desuperheater to be constant through the water pump (15), when the liquid level reaches a set value, the water pump (15) is closed, and when the liquid level is lower than the set value, the water pump is opened;
The opening of the fourth electric regulating valve (11) is controlled at the steam outlet of the steam-water separator through PID, when the steam reaches the set pressure, the fourth electric regulating valve (11) is opened, when the pressure is reduced, the opening of the fourth electric regulating valve (11) is reduced, and when the pressure is increased, the opening of the fourth electric regulating valve (11) is increased; when the pressure is reduced to a set minimum value, the fourth electric regulating valve (11) is closed;
When the heat accumulator is below the set low temperature, the heat release is completed.
8. The method for operating a high temperature thermal storage steam generation regulating apparatus as defined in claim 7, comprising: a natural circulation mode and a forced circulation mode, and the natural circulation mode and the forced circulation mode can be switched; the water supplementing tank (17) maintains a constant liquid level for the water bath type desuperheater (7) through the water pump (15) via the third electric regulating valve (14), different liquid level heights are set according to the parameters of the required superheated steam or saturated steam, and when the liquid level is too high, the water automatically overflows through the first drain valve (19);
when the natural circulation mode is operated, the liquid level of the water bath type desuperheater (7) is constant, the first electric regulating valve (21) is opened, water enters the steam generating module under the action of gravity to generate superheated steam, and the superheated steam enters the water bath type desuperheater (7) to perform temperature and pressure reduction; the liquid level of the water bath type desuperheater is set and adjusted, so that the temperature reduction effect is changed, and superheated steam or saturated steam with different superheat degrees under set pressure can be generated; the saturated steam passes through a steam-water separator (8) to generate dry saturated steam with certain dryness;
When the forced circulation mode is operated, the liquid level of the water bath type desuperheater (7) is constant, the second electric regulating valve (13) is opened, the water pump (15) conveys water into the steam generating module to generate superheated steam, and the superheated steam enters the water bath type desuperheater (7) to perform temperature and pressure reduction; the liquid level of the water bath type desuperheater is set and adjusted, so that the temperature reduction effect is changed, and superheated steam or saturated steam with different superheat degrees under set pressure can be generated; the saturated steam passes through a steam-water separator (8) to generate dry saturated steam with a certain dryness.
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| CN201463059U (en) * | 2009-08-07 | 2010-05-12 | 北京京诚科林环保科技有限公司 | Steam saturated system |
| CN101876432B (en) * | 2009-12-18 | 2011-09-28 | 山东万众节能工程技术有限公司 | Heat accumulating type steam regulator |
| CN202484974U (en) * | 2012-02-09 | 2012-10-10 | 九源天能（北京）科技有限公司昆明分公司 | Fuel gas superheater for in match producing high-quality steam required by refining furnace through exhaust gas of converter |
| CN202791983U (en) * | 2012-09-21 | 2013-03-13 | 亿恒节能科技江苏有限公司 | High dryness water bath type steam attemperator |
| CN106268404B (en) * | 2016-08-29 | 2022-06-24 | 青岛康泰重工机械有限公司 | Steam mixer |
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