阅读说明：本技术 低压缸零出力附加储能发电循环的调峰系统 (Low-pressure cylinder zero-output additional energy storage power generation circulating peak shaving system ) 是由 姚莹莹 赵金峰 孙首珩 李泽阳 豆中州 王行 曹瀚文 李潇 曹兴 苏程志 于 2021-01-11 设计创作，主要内容包括：本发明低压缸零出力附加储能发电循环的调峰系统,属于发电设备领域,包括锅炉系统、高压缸、中压缸、低压缸、抽汽电动门、抽汽逆止门、给水泵、除氧器、凝结水泵、凝汽器、发电机、增压泵、电动门I、电动门II、电动门III、热网加热器、高温储能装置、小汽轮机、高加及低加；解决了供暖期低压缸零出力投入时机组供热量大于用户实际需求量的问题、低压缸零出力只能降低机组负荷不能提高机组负荷的问题和低压缸零出力非供暖期不能辅助机组参与深度调峰的问题,避免了能源的浪费,满足了电网高负荷的需求,满足非供暖期电网低负荷的调峰要求,使机组既能辅助机组降低发电量又能提高发电量。(The invention relates to a peak regulation system of zero-output additional energy storage power generation circulation of a low-pressure cylinder, belonging to the field of power generation equipment and comprising a boiler system, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a steam extraction electric door, a steam extraction check valve, a water feed pump, a deaerator, a condensate pump, a condenser, a generator, a booster pump, an electric door I, an electric door II, an electric door III, a heating network heater, a high-temperature energy storage device, a small steam turbine, a high pressure heater and a low pressure heater; the problem that the unit heat supply is larger than the actual demand of a user when the low-pressure cylinder is put into zero output in the heating period, the problem that the unit load cannot be improved only by reducing the unit load by zero output of the low-pressure cylinder and the problem that the unit cannot assist in deep peak regulation in the non-heating period of zero output of the low-pressure cylinder are solved, energy waste is avoided, the high-load requirement of a power grid is met, the low-load peak regulation requirement of the power grid in the non-heating period is met, and the unit can assist the unit to reduce the power generation and improve the power generation capacity.)

1. A peak shaving system with zero output of a low-pressure cylinder and additional energy storage power generation circulation is characterized in that: the system comprises a boiler system (1), a high-pressure cylinder system, a medium-pressure cylinder system, a low-pressure cylinder system, a condensed water system, a water supply system and an additional energy storage and power generation circulating system;

the boiler system (1) comprises a water wall, a superheater and a reheater;

wherein a water wall inlet of the boiler system (1) is connected with a water side outlet of a No. 1 Gaoka (71), a water wall outlet is connected with a superheater inlet, a superheater outlet is connected with a steam inlet of a high-pressure cylinder (2), a steam outlet of the high-pressure cylinder (2) is connected with a reheater inlet, and a reheater outlet is connected with an inlet of an intermediate-pressure cylinder (3);

the water supply system comprises a deaerator (9), a water supply pump (8), a No. 1 high heater (71), a No. 2 high heater (72) and a No. 3 high heater (73);

the outlet of the deaerator (9) is provided with two paths, one path is connected with the inlet of the water feeding pump (8), the other path is connected with the inlet of the booster pump (14), the outlet of the water feeding pump (8) is connected with the inlet of the No. 3 Gaojia (73), and the inlets and outlets of the No. 3 Gaojia (73), the No. 2 Gaojia (72) and the No. 1 Gaojia (71) are sequentially connected;

the condensate system comprises a condenser (12), a condensate pump (11), a No. 5 low-load condenser (75), a No. 6 low-load condenser (76), a No. 7 low-load condenser (77) and a No. 8 low-load condenser (78);

the outlet of the condenser (12) is connected with the inlet of a condensate pump (11), the outlet of the condensate pump (11) is connected with the inlet of a No. 8 low heater (78), the inlet and the outlet of the No. 8 low heater (78), the inlet and the outlet of a No. 7 low heater (77), a No. 6 low heater (76) and a No. 5 low heater (75) are sequentially connected, and the outlet of the No. 5 low heater (75) is connected with the inlet of a deaerator (9);

the high-pressure cylinder system comprises a high-pressure cylinder (2), a first-stage steam extraction pipe and a second-stage steam extraction pipe, wherein the high-pressure cylinder (2) is connected to a No. 1 step-up motor (71) through the first-stage steam extraction pipe, and the high-pressure cylinder (2) is connected to a No. 2 step-up motor (72) through the second-stage steam extraction pipe;

the intermediate pressure cylinder system comprises an intermediate pressure cylinder (3), a three-section steam extraction, a four-section steam extraction and a five-section steam extraction;

the intermediate pressure cylinder (3) is connected with a No. 3 high pressure booster (73) through three-section steam extraction, the intermediate pressure cylinder (3) is connected with a deaerator (9) through four-section steam extraction, and the intermediate pressure cylinder (3) is connected with a No. 5 low pressure booster (75) through five-section steam extraction;

the steam exhaust of the intermediate pressure cylinder (3) is divided into three paths which are respectively connected to a steam inlet of the low pressure cylinder (4), a heating network heater (18) and a high-temperature energy storage device (19) of an additional energy storage and power generation circulating system, and three pipelines of the steam exhaust of the intermediate pressure cylinder (3) are respectively provided with an electric door I (15), an electric door II (16) and an electric door III (17);

wherein the electric door I (15) is arranged on a pipeline for connecting the exhaust steam of the intermediate pressure cylinder (3) with the high-temperature energy storage device (19);

wherein the electric door II (16) is arranged on a pipeline for connecting the exhaust steam of the intermediate pressure cylinder (3) with the heat supply network heater (18);

wherein the electrically operated gate III (17) is arranged on a pipeline for connecting the exhaust steam of the intermediate pressure cylinder (3) with the high temperature energy storage device (19);

the low-pressure cylinder system comprises a low-pressure cylinder (4), six-section steam extraction, seven-section steam extraction and eight-section steam extraction;

the low-pressure cylinder (4) is connected with a No. 6 low pressure booster (76) through a six-section steam extraction, the low-pressure cylinder (4) is connected with a No. 7 low pressure booster (77) through a seven-section steam extraction, and the low-pressure cylinder (4) is connected with a No. 8 low pressure booster (78) through an eight-section steam extraction;

the steam outlet of the low pressure cylinder (4) is connected with the inlet of a condenser (12) of a condensate system;

the additional energy storage power generation circulating system comprises a booster pump (14), a high-temperature energy storage device (19) and a small steam turbine (20);

wherein the outlet of the booster pump (14) is connected with the high-temperature energy storage device (19), the outlet of the high-temperature energy storage device (19) is connected with the inlet of the small turbine (20), and the exhaust steam of the small turbine (20) is connected with the condenser (12);

the low-pressure cylinder (4) and the small steam turbine exhaust steam (20) are both connected with a generator (13), and the generator (13) is a generator set.

2. The low pressure cylinder zero output additional energy storage power generation cycle peak shaving system of claim 1, wherein: and the first-stage steam extraction, the second-stage steam extraction, the third-stage steam extraction, the fourth-stage steam extraction, the fifth-stage steam extraction, the sixth-stage steam extraction, the seventh-stage steam extraction and the eighth-stage steam extraction are respectively provided with a steam extraction electric door (5) and a steam extraction check valve (6).

3. The low pressure cylinder zero output additional energy storage power generation cycle peak shaving system of claim 2, wherein: the high-temperature energy storage device (19) is an accurate temperature control solid high-temperature heat accumulation type electric boiler.

Technical Field

The invention belongs to the field of power generation equipment, and particularly relates to a peak shaving system of a low-pressure cylinder zero-output additional energy storage power generation cycle.

Background

In recent years, in order to reduce the wind power abandoned wind rate and improve the consumption capacity of new energy in northeast regions, low-cylinder zero-output transformation is carried out on a plurality of cogeneration units, so that the 'thermoelectric decoupling' in the heating period in winter is realized, the constraint of the thermal load on the electrical load is reduced, and the demand of peak shaving of a power grid in the heating period is met.

However, in the process of utilizing the low-pressure cylinder to participate in deep peak shaving with zero output in the heating period, the problem that the heat supply amount of the unit is larger than the actual demand of a user exists firstly, and the zero output of the low-pressure cylinder can only reduce the on-line electric quantity of the unit when the load of the power grid is low, and can not improve the on-line electric quantity of the unit when the load of the power grid is high; and secondly, in a non-heating period, because no hot user exists, the machine set can not participate in deep peak shaving by utilizing the low-pressure cylinder zero-output transformation.

Therefore, the technical scheme is provided, the energy storage power generation cycle is added on the basis of the low-pressure cylinder zero-output transformation, the problem that the heat supply of the unit is larger than the actual demand of a user when the low-pressure cylinder zero-output investment in the heating period is carried out is solved, the problem that the unit load can not be improved only by reducing the unit load by the low-pressure cylinder zero-output can be solved, and the problem that the unit can not be assisted to participate in deep peak shaving in the non-heating period of the low-pressure cylinder zero-output can be solved.

Therefore, the technical scheme is provided, the energy storage power generation cycle is added on the basis of the low-pressure cylinder zero-output transformation, the problem that the heat supply of the unit is larger than the actual demand of a user when the low-pressure cylinder zero-output investment in the heating period is carried out is solved, the problem that the unit load can not be improved only by reducing the unit load by the low-pressure cylinder zero-output can be solved, and the problem that the unit can not be assisted to participate in deep peak shaving in the non-heating period of the low-pressure cylinder zero-output can be solved.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the additional energy storage power generation circulation of the cogeneration unit for carrying out zero-output transformation on the low-pressure cylinder solves the problems that the heat supply amount of the unit is larger than the actual demand amount of a user when the zero-output input of the low-pressure cylinder is carried out in the heating period, the zero-output of the low-pressure cylinder only can reduce the load of the unit and cannot improve the load of the unit, and the zero-output non-heating period of the low-pressure cylinder cannot assist the unit to participate in deep peak shaving.

In order to achieve the technical purpose, the invention provides a low-pressure cylinder zero-output additional energy storage power generation circulating peak shaving system which is characterized in that: the system comprises a boiler system, a high-pressure cylinder system, an intermediate-pressure cylinder system, a low-pressure cylinder system, a condensed water system, a water supply system and an additional energy storage power generation circulating system;

the boiler system comprises a water wall, a superheater and a reheater;

wherein a water wall inlet of the boiler system is connected with a water side outlet of a high pressure boiler No. 1, a water wall outlet is connected with a superheater inlet, a superheater outlet is connected with a steam inlet of a high pressure cylinder, a steam outlet of the high pressure cylinder is connected with a reheater inlet, and a reheater outlet is connected with an inlet of a medium pressure cylinder;

the water supply system comprises a deaerator, a water supply pump, a No. 1 high-pressure heater, a No. 2 high-pressure heater and a No. 3 high-pressure heater;

the outlet of the deaerator is provided with two paths, one path is connected with the inlet of a water feeding pump, the other path is connected with the inlet of a booster pump, the outlet of the water feeding pump is connected with a No. 3 high-pressure feeding inlet, and the inlet and outlet of the No. 3 high-pressure feeding, the No. 2 high-pressure feeding and the No. 1 high-pressure feeding are sequentially connected;

the condensate system comprises a condenser, a condensate pump, a No. 5 low-pressure heater, a No. 6 low-pressure heater, a No. 7 low-pressure heater and a No. 8 low-pressure heater;

the outlet of the condenser is connected with the inlet of a condensate pump, the outlet of the condensate pump is connected with the inlet of the No. 8 low heater, the inlet and outlet of the No. 8 low heater, the outlet of the No. 7 low heater, the outlet of the No. 6 low heater and the outlet of the No. 5 low heater are sequentially connected, and the outlet of the No. 5 low heater is connected with the inlet of the deaerator;

the high-pressure cylinder system comprises a high-pressure cylinder, a first-stage steam extraction pipe and a second-stage steam extraction pipe, wherein the high-pressure cylinder is connected to the No. 1 high pressure booster through the first-stage steam extraction pipe, and the high-pressure cylinder is connected to the No. 2 high pressure booster through the second-stage steam extraction pipe;

the intermediate pressure cylinder system comprises an intermediate pressure cylinder, a three-section steam extraction, a four-section steam extraction and a five-section steam extraction;

the intermediate pressure cylinder is connected with a No. 3 high pressure heater through three-section steam extraction, is connected with a deaerator through four-section steam extraction, and is connected with a No. 5 low pressure heater through five-section steam extraction;

the steam exhaust of the intermediate pressure cylinder is divided into three paths which are respectively connected to a steam inlet of the low pressure cylinder, a heating network heater and a high-temperature energy storage device of an additional energy storage power generation circulating system, and electric doors, namely an electric door I, an electric door II and an electric door III, are respectively arranged on three paths of pipelines of the steam exhaust of the intermediate pressure cylinder;

the electric door I is arranged on a pipeline for connecting the exhaust steam of the intermediate pressure cylinder with the high-temperature energy storage device;

wherein the electric door II is arranged on a pipeline for connecting the exhaust steam of the intermediate pressure cylinder with the heat supply network heater;

the electric door III is arranged on a pipeline for connecting the exhaust steam of the intermediate pressure cylinder with the high-temperature energy storage device;

the low-pressure cylinder system comprises a low-pressure cylinder, a six-section steam extraction, a seven-section steam extraction and an eight-section steam extraction;

the low-pressure cylinder is connected with the No. 6 low pressure booster through a six-section steam extraction, connected with the No. 7 low pressure booster through a seven-section steam extraction, and connected with the No. 8 low pressure booster through an eight-section steam extraction;

the steam outlet of the low pressure cylinder is connected with the inlet of a condenser of a condensate system;

the additional energy storage power generation circulating system comprises a booster pump, a high-temperature energy storage device and a small steam turbine;

the outlet of the booster pump is connected with the high-temperature energy storage device, the outlet of the high-temperature energy storage device is connected with the inlet of the small turbine, and the exhaust of the small turbine is connected with the condenser;

the low-pressure cylinder and the small steam turbine exhaust are both connected with a generator, and the generator is a generator set.

And the first-stage steam extraction, the second-stage steam extraction, the third-stage steam extraction, the fourth-stage steam extraction, the fifth-stage steam extraction, the sixth-stage steam extraction, the seventh-stage steam extraction and the eighth-stage steam extraction are respectively provided with a steam extraction electric door and a steam extraction check valve.

The high-temperature energy storage device is a precise temperature control solid high-temperature heat accumulation type electric boiler.

Through the design scheme, the invention can bring the following beneficial effects: through the design, the problem that the unit heat supply is larger than the actual demand of a user when the low-pressure cylinder with zero output is put into the heating period, the problem that the unit load cannot be improved only by reducing the unit load with zero output of the low-pressure cylinder and the problem that the unit cannot assist in deep peak shaving in the non-heating period with zero output of the low-pressure cylinder are solved, energy waste is avoided, the high-load requirement of a power grid is met, the low-load peak shaving requirement of the power grid in the non-heating period is met, and the unit can assist the unit to reduce the generated energy and improve the generated energy.

Drawings

The invention is further described with reference to the following figures and detailed description:

FIG. 1 is a block diagram of the present invention.

In the figure: 1-boiler system, 2-high pressure cylinder, 3-intermediate pressure cylinder, 4-low pressure cylinder, 5-steam extraction electric door, 6-steam extraction check valve, 8-water supply pump, 9-deaerator, 11-condensate pump, 12-condenser, 13-generator, 14-booster pump, 15-electric door I, 16-electric door II, 17-electric door III, 18-heating network heater, 19-high temperature energy storage device, 20-small turbine, 71-1 high pressure heater, 72-2 high pressure heater, 73-3 high pressure heater, 75-5 low pressure heater, 76-6 low pressure heater, 77-7 low pressure heater, and 78-8 low pressure heater.

Detailed Description

The invention provides a peak shaving system of a low-pressure cylinder zero-output additional energy storage power generation cycle, which is further explained by combining the attached drawings, and is characterized in that: the system comprises a boiler system 1, a high-pressure cylinder system, a medium-pressure cylinder system, a low-pressure cylinder system, a condensed water system, a water supply system and an additional energy storage power generation circulating system;

the boiler system 1 comprises a water wall, a superheater and a reheater;

wherein a water wall inlet of the boiler system 1 is connected with a water side outlet of a No. 1 Gaojia 71, a water wall outlet is connected with a superheater inlet, a superheater outlet is connected with a steam inlet of a high-pressure cylinder 2, a steam outlet of the high-pressure cylinder 2 is connected with a reheater inlet, and a reheater outlet is connected with an inlet of an intermediate pressure cylinder 3;

the water supply system comprises a deaerator 9, a water supply pump 8, a No. 1 high-pressure heater 71, a No. 2 high-pressure heater 72 and a No. 3 high-pressure heater 73;

the outlet of the deaerator 9 is provided with two paths, one path is connected with the inlet of the water feeding pump 8, the other path is connected with the inlet of the booster pump 14, the outlet of the water feeding pump 8 is connected with the inlet of the No. 3 Gao 73, and the inlets and outlets of the No. 3 Gao 73, the No. 2 Gao 72 and the No. 1 Gao 71 are sequentially connected;

the condensate system comprises a condenser 12, a condensate pump 11, a No. 5 low plus 75, a No. 6 low plus 76, a No. 7 low plus 77 and a No. 8 low plus 78;

wherein the outlet of the condenser 12 is connected with the inlet of the condensate pump 11, the outlet of the condensate pump 11 is connected with the inlet of No. 8 low plus 78, the inlet and outlet of No. 8 low plus 78, No. 7 low plus 77, No. 6 low plus 76 and No. 5 low plus 75 are connected in turn, wherein the outlet of No. 5 low plus 75 is connected with the inlet of the deaerator 9;

the high-pressure cylinder system comprises a high-pressure cylinder 2, a first-stage steam extraction pipe and a second-stage steam extraction pipe, wherein the high-pressure cylinder 2 is connected to a No. 1 high pressure booster 71 through the first-stage steam extraction pipe, and the high-pressure cylinder 2 is connected to a No. 2 high pressure booster 72 through the second-stage steam extraction pipe;

the intermediate pressure cylinder system comprises an intermediate pressure cylinder 3, three-stage steam extraction, four-stage steam extraction and five-stage steam extraction;

the intermediate pressure cylinder 3 is connected with a No. 3 high pressure heater 73 through three-section steam extraction, the intermediate pressure cylinder 3 is connected with a deaerator 9 through four-section steam extraction, and the intermediate pressure cylinder 3 is connected with a No. 5 low pressure heater 75 through five-section steam extraction;

the steam exhaust of the intermediate pressure cylinder 3 is divided into three paths which are respectively connected to a steam inlet of the low pressure cylinder 4, the heating network heater 18 and the high temperature energy storage device 19 of the additional energy storage power generation circulating system, and three paths of pipelines of the steam exhaust of the intermediate pressure cylinder 3 are respectively provided with an electric door I15, an electric door II16 and an electric door III 17;

wherein the electric door I15 is arranged on a pipeline for connecting the exhaust steam of the intermediate pressure cylinder 3 with the high-temperature energy storage device 19;

wherein the electric door II16 is arranged on a pipeline for connecting the exhaust steam of the intermediate pressure cylinder 3 with the heating network heater 18;

the electric door III17 is arranged on a pipeline for connecting the exhaust steam of the intermediate pressure cylinder 3 with the high-temperature energy storage device 19;

the low-pressure cylinder system comprises a low-pressure cylinder 4, a six-section steam extraction, a seven-section steam extraction and an eight-section steam extraction;

the low-pressure cylinder 4 is connected with a No. 6 low heater 76 through a six-section steam extraction, the low-pressure cylinder 4 is connected with a No. 7 low heater 77 through a seven-section steam extraction, and the low-pressure cylinder 4 is connected with a No. 8 low heater 78 through an eight-section steam extraction;

the steam outlet of the low pressure cylinder 4 is connected with the inlet of a condenser 12 of a condensate system;

the additional energy storage power generation circulating system comprises a booster pump 14, a high-temperature energy storage device 19 and a small steam turbine 20;

wherein the outlet of the booster pump 14 is connected with the high-temperature energy storage device 19, the outlet of the high-temperature energy storage device 19 is connected with the inlet of the small turbine 20, and the exhaust steam of the small turbine 20 is connected with the condenser 12;

the low pressure cylinder 4 and the small turbine exhaust steam 20 are both connected with a generator 13, and the generator 13 is a generator set.

And the first-stage steam extraction, the second-stage steam extraction, the third-stage steam extraction, the fourth-stage steam extraction, the fifth-stage steam extraction, the sixth-stage steam extraction, the seventh-stage steam extraction and the eighth-stage steam extraction are respectively provided with a steam extraction electric door 5 and a steam extraction check valve 6.

The high-temperature energy storage device 19 is a precise temperature control solid high-temperature heat accumulation type electric boiler.

The core of the invention is to provide a peak regulation system of low-pressure cylinder 4 zero-output additional energy storage power generation circulation, which solves the problems that the heat supply amount of a unit is larger than the actual demand of a user when the low-pressure cylinder 4 zero-output is put in a heating period, the unit load can not be increased only by reducing the unit load by the low-pressure cylinder 4 zero-output, and the deep peak regulation of the unit can not be assisted by the low-pressure cylinder 4 zero-output non-heating period.

The invention will be described in detail with reference to the following detailed description and accompanying drawings:

when the load of the power grid is low during the heating period, the electric door III17 for exhausting steam from the intermediate pressure cylinder 3 to the low pressure cylinder 4 is closed, the low pressure cylinder 4 is cut off, the generated energy of the unit is reduced by reducing the steam inlet amount, and the low-load requirement of the power grid is met. When the heat supply of the unit is matched with the heat actually required by a user, closing the electric door I15 of the high-temperature energy storage device through steam exhaust of the intermediate pressure cylinder, opening the electric door II16 of the heat supply network heater through steam exhaust of the pressure cylinder, and enabling all the steam exhaust of the intermediate pressure cylinder to enter the heat supply network for heating 18; when the heat supply of the unit is greater than the actual heat demand of a user, the electric door I15 for exhausting steam to the high-temperature energy storage device by the intermediate pressure cylinder is opened, part of the steam exhausted by the intermediate pressure cylinder enters the heat supply network heater 18, and part of the steam exhausted by the intermediate pressure cylinder enters the high-temperature energy storage device 19, so that the problem of energy waste caused by the heat supply of the unit being greater than the actual heat demand of the user is solved.

When the power grid load peak in the heating period is reached, the electric door III17 for exhausting steam from the intermediate pressure cylinder 3 to the low pressure cylinder 4 is opened, the electric door I15 for exhausting steam from the intermediate pressure cylinder 3 to the high temperature energy storage device 19 is closed, the booster pump 14 is started, the feed water is heated into superheated steam through the high temperature energy storage device 19, then the small steam turbine 20 is fed in for power generation, the generated energy of the whole unit increased on the premise of meeting the heat supply requirement is met, and the high load requirement of the power grid is met.

And in the non-heating period, closing the steam exhaust of the intermediate pressure cylinder to the electric door II16 of the heating network heater, and stopping supplying heat to the outside.

When the load of the power grid is low during the non-heating period, the steam exhaust of the intermediate pressure cylinder is closed to the electric door III17 of the low pressure cylinder, the operation of cutting off the low pressure cylinder is carried out, the generated energy of the unit is reduced by reducing the steam inlet amount, the steam exhaust of the intermediate pressure cylinder is opened to the electric door I15 of the high temperature energy storage device, the steam exhaust of the intermediate pressure cylinder enters the high temperature energy storage device 19, the heat is stored, the generated energy of the unit is reduced by reducing the steam inlet amount of the low pressure cylinder, and the low-load peak regulation requirement of the power grid.

When the load of the power grid is in a peak in a non-heating period, the intermediate pressure cylinder is opened to exhaust steam to the electric door III17 of the low pressure cylinder, the pressure cylinder is closed to exhaust steam to the electric door I15 of the high temperature energy storage device, the booster pump 14 is started, the feed water is heated into superheated steam through the high temperature energy storage device 19, then the feed water enters the small steam turbine 19 to generate electricity, the generating capacity of the unit is increased, and the peak load regulation requirement of the power grid is met.

The peak shaving system is innovated on the basis of a cogeneration unit system subjected to low-pressure cylinder zero-output transformation, an energy storage power generation cycle is added on the basis of the low-pressure cylinder zero-output system, and the peak shaving system with the low-pressure cylinder zero-output additional energy storage power generation cycle solves the problem that the low-pressure cylinder zero-output can not assist the unit to participate in auxiliary peak shaving in the heating period, and further improves the auxiliary peak shaving capacity of the unit, so that the unit can assist the unit to reduce the generated energy and improve the generated energy.