阅读说明：本技术 一种高温蓄热蒸汽发生调节装置及其工作方法 (High-temperature heat storage steam generation adjusting device and working method thereof ) 是由 杨肖 叶闻杰 孙富华 杨波 王启扬 刘杨 李雪洁 杨冬梅 杜炜 于 2020-05-21 设计创作，主要内容包括：本发明公开了一种高温蓄热蒸汽发生调节装置<I>及其工作方法</I>,装置包括高温蓄热模块、蒸汽发生模块、蒸汽调节系统；蓄热体中均匀分布设置有电加热管；盘管盘设在蓄热体中,盘管的进口位于蓄热体的下部,盘管的出口位于在蓄热体的上部；水浴式减温器中储存有设定液位的水；水浴式减温器下部的出水口通过管道与盘管的进口相连通；补水箱的出水口通过水泵一路管路连通至盘管的进口,另一路管路连通至水浴式减温器底部的补水口；水浴式减温器上部的进气口通过管道与盘管的出口相连通,并连通至水浴式减温器内的分流器；水浴式减温器上部的出气口通过管道与汽水分离器的进口相连通,汽水分离器的出汽口处设置有用于控制开度的第四电动调节阀。(The invention discloses a high-temperature heat storage steam generation adjusting device And method of operating the same 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 arranged 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 stored with 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 replenishing tank is communicated to the inlet of the coil pipe through one pipeline of the water pump, and the other pipeline is communicated to the water replenishing 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 with a shunt in the water bath type desuperheater; the air outlet at the upper part of the water bath type desuperheater is communicated with the inlet of the steam-water separator through a pipeline, and the steam outlet of the steam-water separator is provided with a steam outlet for controllingAnd a fourth electric control valve for controlling the opening degree.)

1. A high-temperature heat storage steam generation and regulation device is characterized by comprising a high-temperature heat storage module, a steam generation module and a steam regulation system; the high-temperature heat storage module comprises a shell (1), a heat storage body (2) and an electric heating pipe (3); the steam generation module comprises a coil (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 the electric heating pipes (3) are uniformly distributed in the heat accumulator (2); the coil (4) is coiled in the heat accumulator (2), the inlet of the coil (4) is positioned at the lower part of the heat accumulator (2), and the outlet of the coil (4) is positioned at the upper part of the heat accumulator (2);

the water bath type desuperheater (7) is stored with water with a set liquid level and is provided with a flow divider (12); a water outlet at the lower part of the water bath type desuperheater (7) is communicated with an 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;

a water outlet of the water replenishing tank (17) is communicated to an inlet of the coil pipe (4) through a pipeline of a water pump (15), and is provided with a second electric regulating valve (13) for controlling the opening and closing of the pipeline, and the other pipeline is communicated to a water replenishing port at the bottom of the water bath type desuperheater (7), and is provided with a third electric regulating valve (14) for controlling the opening and closing of the pipeline;

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 functions of temperature and pressure reduction are achieved;

an air outlet at the upper part of the water bath type desuperheater (7) is communicated with an inlet of the 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); a water outlet at the bottom of the steam-water separator (8) is communicated with the water bath type desuperheater (7) through a pipeline and reflows to be provided with a second drain valve (20).

2. A high-temperature heat-storage steam generation and regulation device as claimed in claim 1, characterized in that the upper part of the water bath type desuperheater (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. A high-temperature heat-storage steam generation regulating device according to claim 2, characterized in that a stop valve (18) is further arranged between the overflow port and the first steam trap (19).

4. A high-temperature heat-storage steam generation regulating device as claimed in claim 1, characterized in that an electric ball valve (16) is arranged at the water inlet of the water replenishing tank (17).

5. A high-temperature heat-storage steam generation regulating device according to claim 1, characterized in that the heat storage bodies (2) are arranged in layers, and electric heating pipes (3) and thermocouples (22) for monitoring the temperature of the heat storage bodies are uniformly distributed in each layer of the heat storage bodies (2);

the coil pipes (4) are distributed in a layered manner, each layer of coil pipe is arranged between the two layers of heat accumulators, and the coil pipes of each layer are communicated.

6. A high-temperature heat-storage steam generation regulating device according to claim 5, characterized in that the heat storage body (2) is divided into five layers, and each layer is provided with three electric heating pipes (3) and two thermocouples (22); the coil pipe has four layers, and each layer of coil pipe is arranged between two layers of heat accumulators.

7. A high-temperature heat-storage steam generation and conditioning device as claimed in claim 1, characterized in that the casing (1) is of a steel plate structure, and an insulating layer is arranged on the inner wall of the casing (1).

8. A high temperature thermal storage steam generation regulating device according to claim 1, characterized by comprising an automated control system, wherein a thermocouple (22) for monitoring the temperature of the thermal storage body is arranged in the thermal storage body (2); a first temperature sensor (5) and a first pressure sensor (6) are arranged at the outlet of the coil (4) and are used for monitoring the temperature and the pressure of the steam at the outlet of the coil (4); a second temperature sensor (9) and a second pressure sensor (10) are arranged at a steam outlet of the steam-water separator (8) 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 (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, 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 opening and the closing;

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 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.

9. A method of operating a high temperature thermal storage steam generation conditioning unit as claimed in any one of claims 1 to 8, including:

when the high-temperature heat storage module stores heat, the automatic control system controls the temperature rise of the heat storage body (2) and the start and stop of the electric heating pipe (3); 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 accumulator reaches a set value, the electric heating pipe stops heating, and the temperature of the electric heating pipe and the temperature of the heat accumulator are recorded in the heat accumulation process;

when the high-temperature heat storage steam generation adjusting device releases heat and outputs steam, the automatic control system controls the first electric control valve (21), the second electric control valve (13), the water pump (15) and the fourth electric control valve (11) to start and stop: when heat is released, the first electric regulating valve (21) or the second electric regulating valve (13) is opened, and when the superheated steam at the outlet of the coil (4) is over-temperature and over-pressure, 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 steam outlet of the steam-water separator controls the opening degree of a fourth electric regulating valve (11) through PID (proportion integration differentiation), when steam reaches set pressure, the fourth electric regulating valve (11) is opened, when the pressure is reduced, the opening degree of the fourth electric regulating valve (11) is reduced, and when the pressure is increased, the opening degree 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 storage body is lower than the set low temperature, heat release is completed.

10. The operating method of a high-temperature heat storage steam generation regulating device according to claim 9, characterized by comprising: the device comprises a natural circulation mode and a forced circulation mode, wherein 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 a water pump (15) and a third electric regulating valve (14), different liquid level heights are set according to parameters of required superheated steam or saturated steam, and when the liquid level is too high, the liquid automatically overflows through a 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 generation module through the action of gravity to generate superheated steam, and the superheated steam enters the water bath type desuperheater (7) to be desuperheated and decompressed; the liquid level of the water bath type desuperheater is set and adjusted, the desuperheating 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 generation module to generate superheated steam, and the superheated steam enters the water bath type desuperheater (7) again to be desuperheated and depressurized; the liquid level of the water bath type desuperheater is set and adjusted, the desuperheating 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.

Technical Field

The invention relates to a high-temperature heat storage steam generation adjusting device and a working method thereof.

Background

Solar energy and wind energy have the characteristics of rich resources, cleanness and no pollution, and play a particularly important role in solving energy crisis and environmental problems. However, solar energy and wind energy have intermittency and instability, and are difficult to meet the requirement of large-scale continuous and stable energy supply in industrialization, so that a high-efficiency heat storage technology must be developed to effectively solve the problems of wind, light and electricity storage and use.

The peak-to-valley difference of the power grid is gradually increased, and the contradiction between the peak regulation capability of the power grid and the objective peak regulation requirement is very sharp. With the continuous production of power generation of the power stations which are built in two years, the regulation and control of the country on the macro economy and the limitation of high-energy-consumption enterprises, the problem of lack of peak regulation means in the valley is more prominent. The heat storage technology is utilized to store the low-price off-peak electricity for peak regulation of the power grid, and the method has great significance.

The high-temperature heat storage steam generation is an important form for large-scale utilization of wind, light, electricity and low-price valley electricity. Therefore, the heat accumulator can efficiently accumulate heat and stably output to generate high-quality steam, 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 wide market prospect. However, no heat accumulator steam model machine capable of producing saturated steam under different pressures and superheated steam with set superheat degree 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 regulating device and a working method thereof, which can produce saturated steam under different pressures and superheated steam with set superheat degree. The heat accumulator stores wind, light, low-price valley electricity and other energy sources and produces stable high-quality steam when needed.

The technical scheme adopted by the invention is as follows:

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 arranged 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 stored with water with a set liquid level and is provided with a flow divider; a water outlet at the lower part of the water bath type desuperheater is communicated with an 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 replenishing tank is communicated to the inlet of the coil pipe through a pipeline of the water pump, and is provided with a second electric regulating valve for controlling the opening and closing of the pipeline;

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 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 functions of temperature and pressure reduction are achieved;

an air outlet at the upper part of the water bath type desuperheater is communicated with an inlet of the steam-water separator through a pipeline, and a fourth electric regulating valve for controlling the opening degree is arranged at an air outlet of the steam-water separator; the water outlet at the bottom of the steam-water separator is communicated with the water bath type desuperheater through a pipeline and flows back to the water bath type desuperheater, 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.

Furthermore, 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 replenishing tank.

In some embodiments, the regenerators are arranged in layers, and the electric heating tubes and thermocouples for monitoring the temperature of the regenerators are uniformly distributed in each layer of the regenerator;

the coil pipes are distributed in a layered manner, each layer of coil pipe is arranged between the two layers of heat accumulators, and the coil pipes of each layer are communicated.

Furthermore, the heat accumulator is divided into five layers, and each layer is provided with three electric heating pipes and two thermocouples; the coil pipe has four layers, and each layer of coil pipe is arranged between two layers of heat accumulators.

In some embodiments, the housing is a steel plate structure, and the inner wall of the housing is provided with an insulating layer.

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 a 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 used for monitoring the temperature and the pressure of the steam at the outlet of the coil pipe; a second temperature sensor and a second pressure sensor are arranged at a steam outlet of the steam-water separator and 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 opening and closing of the automatic control system are controlled;

and 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 sets the opening and closing of the automatic control 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.

In a second aspect, an operating method of the high-temperature heat storage steam generation and regulation device is provided, which comprises the following steps:

when the high-temperature heat storage module stores heat, the automatic control system controls the temperature rise of the heat storage body and the start and stop of the electric heating pipe; 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 accumulator reaches a set value, the electric heating pipe stops heating, and the temperature of the electric heating pipe and the temperature of the heat accumulator are recorded in the heat accumulation process;

when the high-temperature heat storage steam generation adjusting device releases heat and outputs steam, the automatic control system controls the start and stop of the first electric regulating valve, the second electric regulating valve, the water pump and the fourth electric regulating valve: when heat is released, the first electric regulating valve or the second electric regulating valve is opened, and when the superheated steam at the outlet of the coil pipe is over-temperature and over-pressure, 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 steam outlet of the steam-water separator controls the opening of a fourth electric regulating valve through PID (proportion integration differentiation), when steam reaches a 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 a set minimum value, the fourth electric regulating valve is closed;

when the heat storage body is lower than the set low temperature, heat release is completed.

The working method of the high-temperature heat storage steam generation and regulation device comprises the following steps: the device comprises 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 and a third electric regulating valve, different liquid level heights are set according to parameters of superheated steam or saturated steam as required, and when the liquid level is too high, the liquid automatically overflows through a first drain valve;

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 generation module through the action of gravity to generate superheated steam, and the superheated steam enters the water bath type desuperheater to be subjected to temperature and pressure reduction; the liquid level of the water bath type desuperheater is set and adjusted, the desuperheating 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 generation module to generate superheated steam, and the superheated steam enters the water bath type desuperheater again to be subjected to temperature and pressure reduction; the liquid level of the water bath type desuperheater is set and adjusted, the desuperheating 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.

Has the advantages that: compared with the prior art, the high-temperature heat storage steam generation adjusting device and the working method thereof provided by the invention have the following advantages:

saturated steam at different pressures and superheated steam with a set degree of superheat can be produced. The heat accumulator stores wind, light, low-price valley electricity and other energy sources and produces stable high-quality steam when needed.

The steam generation module and the steam conditioning system are designed. The steam generation module can select natural circulation and forced circulation modes to operate. When the heat storage temperature is higher, a natural circulation operation mode can be selected, and the cold and hot impact of inlet water on the coil pipe is relieved. When the temperature of the heat accumulator is lower, the forced circulation mode is automatically switched, so that high-quality steam with set parameters is output. In the steam regulating system, the water replenishing pump provides stable water level for the desuperheater, and 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 desuperheating effect. Through an accurate automatic control system, the temperature of a heat accumulator, the steam pressure and the liquid level of the desuperheater are controlled, the safety of equipment operation is guaranteed, and the efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of a high-temperature heat-storage steam generation regulating device of an embodiment;

in the figure: the device comprises a shell 1, a heat accumulator 2, an electric heating pipe 3, a coil pipe 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 flow divider 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 technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.