阅读说明：本技术 蓄热器供水与供汽式快速调频系统 (Water supply and steam supply type rapid frequency modulation system of heat accumulator ) 是由 王勇 傅吉收 赵明星 王杏 娄扬 于 2021-09-30 设计创作，主要内容包括：一种蓄热器供水与供汽式快速调频系统,包括高压缸,中压缸,低压缸,凝汽器,凝结水泵,下级低压加热器,上级低压加热器,除氧器,高压加热器,低温再热器,再热蒸汽冷段调节阀,通过管道与再热蒸汽冷段调节阀相连接的蓄热器,中压缸抽汽调节阀,通过管道与蓄热器上部相连接的供蒸汽侧调节阀,通过管道与供蒸汽侧调节阀相连接的电再热器,通过管道与电再热器相连接、控制蒸汽用户供给的蒸汽热用户侧手动关断阀,与蓄热器下部侧面相连接的热水用户供给装置。本发明蓄热器供水与供汽式快速调频系统,能满足电网快速调频需求,提高机组运行经济性,利用蓄热器将蒸汽存储起来,提高蒸汽利用率,节能。可广泛应用于电厂调频领域中。(The utility model provides a quick frequency modulation system of heat accumulator water supply and steam supply formula, including the high pressure jar, the intermediate pressure jar, the low pressure jar, the condenser, condensate pump, subordinate low pressure heater, higher level low pressure heater, the oxygen-eliminating device, high pressure heater, the low temperature reheater, the cold section governing valve of reheat steam, the heat accumulator that is connected with the cold section governing valve of reheat steam through the pipeline, the steam side governing valve is taken out to the intermediate pressure jar, the confession steam side governing valve that is connected with heat accumulator upper portion through the pipeline, the electric reheater that is connected with confession steam side governing valve through the pipeline, be connected with the electric reheater through the pipeline, the steam heat user side manual shutoff valve of control steam user supply, the hot water user feeding device who is connected with heat accumulator lower part side. The water supply and steam supply type rapid frequency modulation system of the heat accumulator can meet the rapid frequency modulation requirement of a power grid, improve the running economy of a unit, store steam by using the heat accumulator, improve the utilization rate of the steam and save energy. Can be widely applied to the field of frequency modulation of power plants.)

1. A water supply and steam supply type rapid frequency modulation system of a heat accumulator is characterized by comprising a high-pressure cylinder, an intermediate-pressure cylinder connected with the high-pressure cylinder through a pipeline, a low-pressure cylinder connected with the intermediate-pressure cylinder through a pipeline, a condenser connected with the low-pressure cylinder through a pipeline, a condensate pump connected with the condenser through a pipeline, a lower-level low-pressure heater connected with the condensate pump through a pipeline and the condenser through a first drain pipeline, a higher-level low-pressure heater connected with the lower-level low-pressure heater through a pipeline, a second drain pipeline and the intermediate-pressure cylinder, a deaerator connected with the higher-level low-pressure heater through a pipeline, a high-pressure heater connected with the deaerator through a pipeline and a third drain pipeline, and a low-temperature reheater connected with a pipeline of the high-pressure cylinder through a pipeline, the steam-heating system comprises a low-temperature reheater, a reheated steam cold section regulating valve, a heat accumulator, a medium-pressure cylinder steam extraction regulating valve, a steam supply side regulating valve, an electric reheater, a steam user side manual shutoff valve and a hot water user supply device, wherein the reheated steam cold section regulating valve is connected with a high-pressure cylinder, the heat accumulator is connected with the reheated steam cold section regulating valve through a pipeline, one end of the heat accumulator is connected with the pipeline between the reheated steam cold section regulating valve and the heat accumulator through a pipeline, the other end of the heat accumulator is connected with the medium-pressure cylinder steam extraction regulating valve on the medium-pressure cylinder steam extraction pipeline through a pipeline, the steam supply side regulating valve is connected with the upper portion of the heat accumulator through a pipeline, the electric reheater is connected with the steam supply side regulating valve through a pipeline, the steam user side manual shutoff valve is used for controlling steam user supply, and the hot water user supply device is connected with the side face of the lower portion of the heat accumulator.

2. The system according to claim 1, wherein the hot water user supply means comprises a hot water return side regulating valve connected to a hot water return port on a side of a lower portion of the heat accumulator via a pipe, a hot water return side manual shut-off valve connected to the hot water return side regulating valve via a pipe for controlling return of the hot water user, a hot water supply side regulating valve located on an upper portion of the hot water return port of the heat accumulator and connected to a hot water supply port on a side of the heat accumulator via a pipe, and a hot water supply side manual shut-off valve connected to the hot water supply side regulating valve via a pipe for controlling supply of the hot water user.

Technical Field

The invention relates to a water supply and steam supply type rapid frequency modulation system of a heat accumulator, which can be widely applied to the field of frequency modulation of power plants.

Background

The stability and accuracy of the power supply frequency of the power grid are important indexes of power supply quality. When the sum of active power produced by the generator sets in the power grid is larger than the sum of related power consumed by the power grid, the power supply frequency is increased, and otherwise, the power supply frequency is reduced. The change and deviation of the power grid frequency have great influence and harm on users and prime movers, the frequency modulation process is a process for adjusting energy balance in the power production process, and the energy supply of various energy storage and thermodynamic systems is adjusted through frequency modulation, so that the energy balance of power generation and power utilization is realized, and the reasonable distribution of electric loads is realized.

Disclosure of Invention

The invention aims to provide a water supply and steam supply type rapid frequency modulation system of a heat accumulator, which can meet the rapid frequency modulation requirement of a power grid, improve the running economy of a unit, store steam by using the heat accumulator, improve the utilization rate of the steam and save energy.

In order to achieve the above purpose, the water and steam supply type rapid frequency modulation system of the heat accumulator comprises a high pressure cylinder, an intermediate pressure cylinder connected with the high pressure cylinder through a pipeline, a low pressure cylinder connected with the intermediate pressure cylinder through a pipeline, a condenser connected with the low pressure cylinder through a pipeline, a condensate pump connected with the condenser through a pipeline, a lower-level low pressure heater connected with the condensate pump through a pipeline and the condenser through a first drain pipeline, a higher-level low pressure heater connected with the lower-level low pressure heater through a pipeline and a second drain pipeline and connected with the intermediate pressure cylinder through a steam extraction pipeline of the intermediate pressure cylinder, a deaerator connected with the higher-level low pressure heater through a pipeline, a high pressure heater connected with the deaerator through a pipeline and a third drain pipeline, and a low temperature reheater connected with a pipeline of the high pressure cylinder, the steam-heating system comprises a low-temperature reheater, a reheated steam cold section regulating valve, a heat accumulator, a medium-pressure cylinder steam extraction regulating valve, a steam supply side regulating valve, an electric reheater, a steam user side manual shutoff valve and a hot water user supply device, wherein the reheated steam cold section regulating valve is connected with a high-pressure cylinder, the heat accumulator is connected with the reheated steam cold section regulating valve through a pipeline, one end of the heat accumulator is connected with the pipeline between the reheated steam cold section regulating valve and the heat accumulator through a pipeline, the other end of the heat accumulator is connected with the medium-pressure cylinder steam extraction regulating valve on the medium-pressure cylinder steam extraction pipeline through a pipeline, the steam supply side regulating valve is connected with the upper portion of the heat accumulator through a pipeline, the electric reheater is connected with the steam supply side regulating valve through a pipeline, the steam user side manual shutoff valve is used for controlling steam user supply, and the hot water user supply device is connected with the side face of the lower portion of the heat accumulator.

The invention relates to a water supply and steam supply type rapid frequency modulation system of a heat accumulator, wherein a hot water user supply device comprises a hot water return side regulating valve connected with a hot water return port on the side surface of the lower part of the heat accumulator through a pipeline, a hot water return side manual shutoff valve connected with the hot water return side regulating valve through a pipeline and used for controlling the return water of a hot water user, a hot water supply side regulating valve positioned on the upper part of the hot water return port of the heat accumulator and connected with a hot water supply port on the side surface of the heat accumulator through a pipeline, and a hot water supply side manual shutoff valve connected with the hot water supply side regulating valve through a pipeline and used for controlling the water supply of the hot water user.

The invention relates to a water supply and steam supply type rapid frequency modulation system of a heat accumulator, which has the working principle that: when the system operates at the base load, the reheat steam cold section regulating valve or the intermediate pressure cylinder steam extraction regulating valve is opened, steam is extracted from the reheat steam cold section or the intermediate pressure cylinder, and the steam provides steam for a user through the steam supply side regulating valve. And if the user needs the superheated steam, the electric reheater is opened, and the saturated steam is heated into the superheated steam for the user to use. If the user requires saturated steam, the electric reheater is shut down. When the frequency of the power grid needs to be improved, the steam extraction flow is reduced, so that the output electric power of the steam turbine is increased; when the grid frequency needs to be reduced, the extraction flow is increased, so that the output electric power of the steam turbine is reduced. Therefore, the requirement of rapid frequency modulation of the power grid can be met, and the running economy of the unit is improved.

The heat accumulator can store extracted steam and continuously supply the extracted steam to a steam user for use, thereby playing roles in storage and buffering. Therefore, the steam is stored by the heat accumulator, and the steam utilization rate is improved.

The invention relates to a water supply and steam supply type rapid frequency modulation system of a heat accumulator, which operates with a fixed value basic load, namely, a frequency modulation steam extraction system extracts steam with a fixed value flow. The basic load is determined by comprehensively considering the flow of the reheat steam cold section, the steam extraction flow of the intermediate pressure cylinder and the frequency modulation range under the condition of low load.

According to the water supply and steam supply type rapid frequency modulation system of the heat accumulator, if a user needs saturated steam, the steam stored in the heat accumulator can be directly used; if the user needs the superheated steam, the steam in the heat accumulator needs to be heated by the electric heater and then used by the user.

According to the water supply and steam supply type rapid frequency modulation system of the heat accumulator, when the capacity of the heat accumulator is large, hot water can be supplied under the condition that the steam demand of a user is ensured. The water side of the heat accumulator forms a closed circulation system, hot water flows out of the heat accumulator, and return water flows into the heat accumulator to exchange heat with the user side.

The heat accumulator water supply and steam supply type rapid frequency modulation system realizes a steam extraction path for rapid frequency modulation, and can be used for extraction of steam at a reheating steam cold section or extraction of steam at an intermediate pressure cylinder, and can also be used for combination of two paths. The two-way steam extraction can meet the flow requirement and achieve the aim of energy conservation.

In conclusion, the water supply and steam supply type rapid frequency modulation system of the heat accumulator can meet the requirement of rapid frequency modulation of a power grid, improve the running economy of a unit, store steam by using the heat accumulator, improve the utilization rate of the steam and save energy.

Drawings

The invention will be further described with reference to the accompanying drawings and examples thereof.

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

In fig. 1, the heat accumulator water and steam supply type fast frequency modulation system of the present invention comprises a high pressure cylinder 1, an intermediate pressure cylinder 2 connected with the high pressure cylinder through a pipeline, a low pressure cylinder 3 connected with the intermediate pressure cylinder through a pipeline, a condenser 4 connected with the low pressure cylinder through a pipeline, a condensate pump 5 connected with the condenser through a pipeline, a lower stage low pressure heater 6 connected with the condensate pump through a pipeline and the condenser through a first drain pipeline 18, a higher stage low pressure heater 7 connected with the lower stage low pressure heater through a pipeline and a second drain pipeline 19 and connected with the intermediate pressure cylinder through an intermediate pressure cylinder steam extraction pipeline 20, a deaerator 8 connected with the higher stage low pressure heater through a pipeline, a high pressure heater 9 connected with the deaerator through a pipeline and the deaerator through a third drain pipeline 21, the steam-heating system comprises a low-temperature reheater 10 connected with a high-pressure cylinder through a pipeline, a low-temperature reheater connected with the high-pressure cylinder through a pipeline, a reheat steam cold section regulating valve 11 connected with the high-pressure cylinder, a heat accumulator 12 connected with the reheat steam cold section regulating valve through a pipeline, a medium-pressure cylinder steam extraction regulating valve 13 with one end connected with the pipeline between the reheat steam cold section regulating valve and the heat accumulator through a pipeline and the other end connected with a medium-pressure cylinder steam extraction pipeline through a pipeline, a steam supply side regulating valve 14 connected with the upper part of the heat accumulator through a pipeline, an electric reheater 15 connected with the steam supply side regulating valve through a pipeline, a steam-heating user side manual shutoff valve 16 for controlling the supply of steam users, and a hot water user supply device 17 connected with the side face of the lower part of the heat accumulator.

The invention relates to a water supply and steam supply type rapid frequency modulation system of a heat accumulator, wherein a hot water user supply device 17 comprises a hot water return side regulating valve 17-1 connected with a hot water return port on the side surface of the lower part of the heat accumulator through a pipeline, a hot water return side manual shutoff valve 17-2 connected with the hot water return side regulating valve through a pipeline and used for controlling the return water of a hot water user, a hot water supply side regulating valve 17-3 positioned on the upper part of the hot water return port of the heat accumulator and connected with a hot water supply port on the side surface of the heat accumulator through a pipeline, and a hot water supply side manual shutoff valve 17-4 connected with the hot water supply side regulating valve through a pipeline and used for controlling the water supply of the hot water user.

In view of the foregoing, it is intended that the present invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims; any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention by those skilled in the art can be made without departing from the technical scope of the present invention, and still fall within the protection scope of the technical solution of the present invention.