阅读说明：本技术 一种热电联产机组运行区域的测试方法及系统 (Method and system for testing operation area of cogeneration unit ) 是由 文立斌 于 2020-05-09 设计创作，主要内容包括：本发明公开了一种热电联产机组运行区域的测试方法及系统,其方法包括：产生控制指令开启蒸汽扩容器调节阀前截止阀和蒸汽扩容器调节阀后截止阀；基于蒸汽扩容器温度测量仪获取蒸汽扩容器上的温度；控制抽气管道上的截止阀和调节阀,维持供热蒸汽联箱温度值和供热蒸汽联箱的压力值达到热用户供热需求值；控制热用户供气调节阀,使得供气流量值达到不同的测量流量值,基于发电机组电功率测试仪获取当前的发电机组电功率值；基于所述测量流量值和所对应的发电机组电功率值获取到所对应的供热蒸汽流量与电功率运行区域图。在本发明实施例中达到时既保障机组供热需求,同时又充分发挥机组电力调峰能力,增强改造后发电机组供热与电功率实时调节灵活性。(The invention discloses a method and a system for testing an operation area of a cogeneration unit, wherein the method comprises the following steps: generating a control instruction to open a front stop valve of the regulating valve of the steam flash tank and a rear stop valve of the regulating valve of the steam flash tank; acquiring the temperature on the steam flash tank based on a steam flash tank temperature measuring instrument; controlling a stop valve and an adjusting valve on the air extraction pipeline, and maintaining the temperature value of the heat supply steam header and the pressure value of the heat supply steam header to reach the heat supply requirement value of a heat user; controlling a hot user air supply regulating valve to enable the air supply flow value to reach different measurement flow values, and acquiring the current electric power value of the generator set based on the electric power tester of the generator set; and acquiring a corresponding heat supply steam flow and electric power operation area map based on the measured flow value and the corresponding electric power value of the generator set. When the embodiment of the invention is reached, the heat supply requirement of the generator set is ensured, the power peak regulation capability of the generator set is fully exerted, and the flexibility of heat supply and real-time electric power regulation of the generator set after modification is enhanced.)

1. A method of testing an operating area of a cogeneration unit, the cogeneration unit comprising: boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder, generating set, condenser, generating set electric power tester and data acquisition and control module, heat supply steam header and steam flash tank, wherein: the boiler is connected with the steam turbine high-pressure cylinder through a steam supply pipeline, the boiler is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, the steam turbine high-pressure cylinder is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, and the steam turbine intermediate-pressure cylinder is connected with the steam turbine low-pressure cylinder through a steam supply pipeline; the generator set and the condenser are arranged at the low-pressure cylinder of the steam turbine; the condenser comprises a steam chamber and a water chamber, and the water chamber is connected with a condensed water main pipe; the heat supply steam header is connected to a steam extraction port of the steam turbine through a steam extraction pipeline, and the heat supply steam header is supplied to a user through one path of an eighth steam supply pipeline, and the other path of the heat supply steam header is connected with the steam flash tank; the steam flash tank is connected to the steam chamber through a pipeline and is connected to the water chamber through a pipeline; one path of the condensed water main pipe is used for draining water, and the other path of the condensed water main pipe is connected to the steam flash tank; each generator stator on the generator set is connected with a voltage converter and a current converter, the output end of the voltage converter is connected with the generator set electric power tester, the output end of the current converter is connected with the generator set electric power tester, the data acquisition and control module generates a control command and acquires a data value on the generator set electric power tester, and the testing method based on the cogeneration unit comprises the following steps:

generating a control instruction to open a front stop valve of the regulating valve of the steam flash tank and a rear stop valve of the regulating valve of the steam flash tank;

acquiring the temperature on the steam flash tank based on a steam flash tank temperature measuring instrument;

judging whether the temperature value on the steam flash tank exceeds a preset temperature value or not, and controlling the opening and closing of a water spraying temperature reduction regulating valve to enable the temperature value on the steam flash tank not to exceed the preset temperature value;

controlling a stop valve and an adjusting valve on the air extraction pipeline, and maintaining the temperature value of the heat supply steam header and the pressure value of the heat supply steam header to reach the heat supply requirement value of a heat user;

controlling a hot user air supply regulating valve to enable the air supply flow value to reach different measurement flow values, and acquiring the current electric power value of the generator set based on the electric power tester of the generator set;

and acquiring a corresponding heat supply steam flow and electric power operation area map based on the measured flow value and the corresponding electric power value of the generator set.

2. The method for testing an operating area of a cogeneration unit of claim 1, wherein obtaining the map of the corresponding hot steam flow and electric power operating area based on the measured flow value and the corresponding generator unit electric power value further comprises:

and generating a corresponding scheduling instruction based on the heat supply steam flow and the electric power operation area diagram, and finishing corresponding scheduling control based on the scheduling instruction.

3. The method for testing an operating area of a cogeneration unit of claim 1, wherein said controlling the opening and closing of the water spray attemperation control valve such that the temperature value on the steam flash tank does not exceed the preset temperature value further comprises:

and controlling to open a drain valve of the steam supply header to drain accumulated water in the heat supply steam header.

4. The method for testing an operating area of a cogeneration unit of claim 1, wherein said controlling a stop valve and a regulating valve on an extraction duct to maintain a heating steam header temperature value and a heating steam header pressure value at a heating user heating demand value comprises:

controlling to open a front stop valve of the steam extraction regulating valve and a rear stop valve of the steam extraction regulating valve, opening the 5% opening degree of the steam extraction regulating valve, and gradually opening the steam extraction regulating valve until the steam extraction regulating valve is fully opened when a measurement display value of the steam temperature measuring device of the heat supply steam header reaches a heat supply demand value of a user, so that a steam header pressure value displayed by the steam pressure measuring device of the heat supply steam header is maintained at the heat supply demand value of the heat user; and opening a front stop valve of the steam supply regulating valve and a rear stop valve of the steam supply regulating valve.

5. The method for testing an operating area of a cogeneration unit according to any one of claims 1 to 4, wherein said controlling the hot user supply air regulating valve so that the supply air flow value reaches different measured flow values, said obtaining a current generator set electric power value based on the generator set electric power tester comprising:

opening a hot user steam supply regulating valve, keeping the operation condition stable when the display value of a steam flow tester is 15t/h, setting a steam flash tank regulating valve to automatically regulate and keep the current display value of the steam flow tester in real time, recording the display value of an electric power tester of the generator set, wherein the recording time is 10min, and the recording period is 30 ms;

the method comprises the steps that a steam supply regulating valve is continuously opened, when the display value of a steam flow tester is increased by 30t/h, the operation working condition is kept stable, a stop valve in front of a full-open steam flash tank regulating valve and a stop valve behind the steam flash tank regulating valve are arranged, the steam flash tank regulating valve is arranged to automatically regulate and keep the display value of the current steam flow tester in real time, the display value of a generator set electric power tester for measuring the electric power of a generator set is recorded, the recording time is 10min, and the recording period is 30 ms.

6. The method of testing an operating area of a cogeneration unit of claim 5, wherein said controlling the hot user supply air regulating valve so that the supply air flow value reaches different measured flow values, obtaining a current generator set electric power value based on the generator set electric power tester comprises:

when a steam supply regulating valve for controlling the steam supply flow of a hot user is fully opened and a steam extraction regulating valve is fully opened, a large steam turbine regulating valve is gradually opened until the large steam turbine regulating valve is fully opened, the steam flow entering a steam turbine is increased, the electric power of a generator is correspondingly increased, the steam supply flow is increased outwards through the fully opened steam supply regulating valve, the running working condition is kept stable when the display value of a steam supply flow tester is increased by 30t/h, a steam flash tank regulating valve is arranged to automatically adjust and keep the current display value of the steam supply flow tester in real time, the display value of a power transmitter for measuring the electric power of a generator set is recorded, the recording time is 10min, and the recording period is 30 ms.

7. The method of testing an operating area of a cogeneration unit of claim 6, wherein said controlling the hot user supply air regulating valve so that the supply air flow value reaches different measured flow values, obtaining the current generator set electric power value based on the generator set electric power tester comprises:

when the steam turbine regulating valve is kept unchanged after being fully opened, the steam supply regulating valve for the hot user is turned off gradually, and the opening degree of the steam extraction regulating valve is adjusted in real time, so that the pressure value of the steam header displayed by the steam pressure measuring device of the heat supply steam header is maintained at 0.4 MPa;

when the display value of the steam supply flow meter is reduced by 30t/h, the operation condition is kept stable, a flash tank regulating valve is arranged to automatically regulate and keep the current display value of the steam supply flow meter in real time, the display value of a generator set electric power tester for measuring the electric power of the generator set is recorded, the recording time is 10min, and the recording period is 30 ms.

8. The method of testing an operating area of a cogeneration unit of claim 7, wherein said controlling the hot user supply air regulating valve so that the supply air flow value reaches different measured flow values, obtaining a current generator set electric power value based on the generator set electric power tester comprises:

and (4) closing the hot user steam supply regulating valve one by one, and adjusting the opening of the small steam extraction regulating valve in real time until the hot user steam supply regulating valve and the steam extraction regulating valve are completely closed, so as to obtain the maximum electric power of the unit.

9. A test system for an operating area of a cogeneration unit, the cogeneration unit comprising: boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder, generating set, condenser, generating set electric power tester, heat supply steam header and steam flash tank, wherein: the boiler is connected with the steam turbine high-pressure cylinder through a steam supply pipeline, the boiler is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, the steam turbine high-pressure cylinder is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, and the steam turbine intermediate-pressure cylinder is connected with the steam turbine low-pressure cylinder through a steam supply pipeline; the generator set and the condenser are arranged at the low-pressure cylinder of the steam turbine; the condenser comprises a steam chamber and a water chamber, and the water chamber is connected with a condensed water main pipe; the heat supply steam header is connected to a steam extraction port of the steam turbine through a steam extraction pipeline, and the heat supply steam header is supplied to a user through one path of an eighth steam supply pipeline, and the other path of the heat supply steam header is connected with the steam flash tank; the steam flash tank is connected to the steam chamber through a pipeline and is connected to the water chamber through a pipeline; one path of the condensed water main pipe is used for draining water, and the other path of the condensed water main pipe is connected to the steam flash tank; a voltage converter and a current converter are connected to each generator stator of the generator set, an output end of the voltage converter is connected to the generator set electric power tester, an output end of the current converter is connected to the generator set electric power tester, and the test system is used for executing the method according to any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of electric power, in particular to a method and a system for testing an operation area of a cogeneration unit.

Background

Responding to the requirements of national energy-saving and environment-friendly policies, industrial small boilers are gradually eliminated, and peripheral condensing generator sets are replaced by the industrial small boilers, and steam supply to heat-consuming enterprises is realized through steam extraction. The problems of complex process, large engineering quantity, long time and the like exist in the steam turbine body punching and steam extraction, and a method of punching and steam extraction from a steam turbine intermediate pressure cylinder communicating pipe and a high pressure cylinder steam exhaust pipe (namely a reheater cold section) is widely adopted. The steam extraction and heat supply of the intermediate pressure cylinder communicating pipe is suitable for hot users with low pressure and low temperature requirement but large steam consumption, the steam extraction of the cold section of the reheater is suitable for hot users with high pressure and high temperature, the two steam extraction and heat supply modes can realize both power generation and outward steam supply under the condition that the steam turbine body is not modified, the steam parameter requirements of most of user enterprises can be met, and therefore the steam extraction and heat supply system is widely applied. However, after the pure condensing steam turbine generator unit is subjected to heat supply transformation, the safe operation area of the correlation between the heat supply steam flow and the electric power of the unit cannot be accurately supported, the power grid dispatching department cannot effectively dispatch the on-line electric power of the unit according to the heat supply flow, and the unit operator cannot effectively regulate and control the heat supply steam flow according to the current electric power.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a method and a system for testing the running area of a cogeneration unit, which solve the problem that the on-line electric power of the unit cannot be effectively scheduled according to the heat supply flow, ensure the heat supply test requirement of the unit, fully exert the electric power peak shaving capacity of the unit and enhance the flexibility of real-time regulation of the heat supply and the electric power of the unit after modification.

In order to solve the above technical problem, an embodiment of the present invention provides a method for testing an operating area of a cogeneration unit, where the cogeneration unit includes: boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder, generating set, condenser, generating set electric power tester, heat supply steam header and steam flash tank, wherein: the boiler is connected with the steam turbine high-pressure cylinder through a steam supply pipeline, the boiler is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, the steam turbine high-pressure cylinder is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, and the steam turbine intermediate-pressure cylinder is connected with the steam turbine low-pressure cylinder through a steam supply pipeline; the generator set and the condenser are arranged at the low-pressure cylinder of the steam turbine; the condenser comprises a steam chamber and a water chamber, and the water chamber is connected with a condensed water main pipe; the heat supply steam header is connected to a steam extraction port of the steam turbine through a steam extraction pipeline, and the heat supply steam header is supplied to a user through one path of an eighth steam supply pipeline, and the other path of the heat supply steam header is connected with the steam flash tank; the steam flash tank is connected to the steam chamber through a pipeline and is connected to the water chamber through a pipeline; one path of the condensed water main pipe is used for draining water, and the other path of the condensed water main pipe is connected to the steam flash tank; each generator stator on the generator set is connected with a voltage converter and a current converter, the output end of the voltage converter is connected with the generator set electric power tester, the output end of the current converter is connected with the generator set electric power tester, and the testing method based on the cogeneration unit comprises the following steps:

generating a control instruction to open a front stop valve of the regulating valve of the steam flash tank and a rear stop valve of the regulating valve of the steam flash tank;

acquiring the temperature on the steam flash tank based on a steam flash tank temperature measuring instrument;

judging whether the temperature value on the steam flash tank exceeds a preset temperature value or not, and controlling the opening and closing of a water spraying temperature reduction regulating valve to enable the temperature value on the steam flash tank not to exceed the preset temperature value;

controlling a stop valve and an adjusting valve on the air extraction pipeline, and maintaining the temperature value of the heat supply steam header and the pressure value of the heat supply steam header to reach the heat supply requirement value of a heat user;

controlling a hot user air supply regulating valve to enable the air supply flow value to reach different measurement flow values, and acquiring the current electric power value of the generator set based on the electric power tester of the generator set;

and acquiring a corresponding heat supply steam flow and electric power operation area map based on the measured flow value and the corresponding electric power value of the generator set.

After the corresponding heat supply steam flow and electric power operation area map is obtained based on the measured flow value and the corresponding electric power value of the generator set, the method further comprises the following steps:

and generating a corresponding scheduling instruction based on the heat supply steam flow and the electric power operation area diagram, and finishing corresponding scheduling control based on the scheduling instruction.

The control water spray desuperheating governing valve open and close make the temperature value on the steam flash tank not exceed still include after the preset temperature value:

and controlling to open a drain valve of the steam supply header to drain accumulated water in the heat supply steam header.

The control of the stop valve and the regulating valve on the air extraction pipeline to maintain the temperature value of the heat supply steam header and the pressure value of the heat supply steam header to reach the heat supply requirement value of the heat user comprises the following steps:

controlling to open a front stop valve of the steam extraction regulating valve and a rear stop valve of the steam extraction regulating valve, opening the 5% opening degree of the steam extraction regulating valve, and gradually opening the steam extraction regulating valve until the steam extraction regulating valve is fully opened when a measurement display value of the steam temperature measuring device of the heat supply steam header reaches a heat supply demand value of a user, so that a steam header pressure value displayed by the steam pressure measuring device of the heat supply steam header is maintained at the heat supply demand value of the heat user; and opening a front stop valve of the steam supply regulating valve and a rear stop valve of the steam supply regulating valve.

The method for controlling the hot user air supply regulating valve to enable the air supply flow value to reach different measurement flow values includes the following steps of:

opening a hot user steam supply regulating valve, keeping the operation condition stable when the display value of a steam flow tester is 15t/h, setting a steam flash tank regulating valve to automatically regulate and keep the current display value of the steam flow tester in real time, recording the display value of an electric power tester of the generator set, wherein the recording time is 10min, and the recording period is 30 ms;

the method comprises the steps that a steam supply regulating valve is continuously opened, when the display value of a steam flow tester is increased by 30t/h, the operation working condition is kept stable, a stop valve in front of a full-open steam flash tank regulating valve and a stop valve behind the steam flash tank regulating valve are arranged, the steam flash tank regulating valve is arranged to automatically regulate and keep the display value of the current steam flow tester in real time, the display value of a generator set electric power tester for measuring the electric power of a generator set is recorded, the recording time is 10min, and the recording period is 30 ms.

The method for controlling the hot user air supply regulating valve to enable the air supply flow value to reach different measurement flow values includes the following steps of:

when a steam supply regulating valve for controlling the steam supply flow of a hot user is fully opened and a steam extraction regulating valve is fully opened, a large steam turbine regulating valve is gradually opened until the large steam turbine regulating valve is fully opened, the steam flow entering a steam turbine is increased, the electric power of a generator is correspondingly increased, the steam supply flow is increased outwards through the fully opened steam supply regulating valve, the running working condition is kept stable when the display value of a steam supply flow tester is increased by 30t/h, a steam flash tank regulating valve is arranged to automatically adjust and keep the current display value of the steam supply flow tester in real time, the display value of a power transmitter for measuring the electric power of a generator set is recorded, the recording time is 10min, and the recording period is 30 ms.

The method for controlling the hot user air supply regulating valve to enable the air supply flow value to reach different measurement flow values includes the following steps of:

when the steam turbine regulating valve is kept unchanged after being fully opened, the steam supply regulating valve for the hot user is turned off gradually, and the opening degree of the steam extraction regulating valve is adjusted in real time, so that the pressure value of the steam header displayed by the steam pressure measuring device of the heat supply steam header is maintained at 0.4 MPa;

when the display value of the steam supply flow meter is reduced by 30t/h, the operation condition is kept stable, a flash tank regulating valve is arranged to automatically regulate and keep the current display value of the steam supply flow meter in real time, the display value of a generator set electric power tester for measuring the electric power of the generator set is recorded, the recording time is 10min, and the recording period is 30 ms.

The method for controlling the hot user air supply regulating valve to enable the air supply flow value to reach different measurement flow values includes the following steps of:

and (4) closing the hot user steam supply regulating valve one by one, and adjusting the opening of the small steam extraction regulating valve in real time until the hot user steam supply regulating valve and the steam extraction regulating valve are completely closed, so as to obtain the maximum electric power of the unit.

Correspondingly, an embodiment of the present invention further provides a system for testing an operating area of a cogeneration unit, where the cogeneration unit includes: boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder, generating set, condenser, generating set electric power tester, heat supply steam header and steam flash tank, wherein: the boiler is connected with the steam turbine high-pressure cylinder through a steam supply pipeline, the boiler is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, the steam turbine high-pressure cylinder is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, and the steam turbine intermediate-pressure cylinder is connected with the steam turbine low-pressure cylinder through a steam supply pipeline; the generator set and the condenser are arranged at the low-pressure cylinder of the steam turbine; the condenser comprises a steam chamber and a water chamber, and the water chamber is connected with a condensed water main pipe; the heat supply steam header is connected to a steam extraction port of the steam turbine through a steam extraction pipeline, and the heat supply steam header is supplied to a user through one path of an eighth steam supply pipeline, and the other path of the heat supply steam header is connected with the steam flash tank; the steam flash tank is connected to the steam chamber through a pipeline and is connected to the water chamber through a pipeline; one path of the condensed water main pipe is used for draining water, and the other path of the condensed water main pipe is connected to the steam flash tank; each generator stator on the generator set is connected with a voltage converter and a current converter, the output end of the voltage converter is connected with the generator set electric power tester, the output end of the current converter is connected with the generator set electric power tester, and the test system is used for executing the method.

In the embodiment of the invention, the accurate test of the heat supply amount and the electric power operation area of the steam extraction heat supply generating set can be completed based on the method and the system, after the heat supply amount and the electric power operation area are obtained, the power grid dispatching department can be effectively guided to regulate and control the electric power of the generator under the condition of guaranteeing heat supply, the heat supply unit is deeply involved in the power grid peak-valley regulation, and clean energy such as water, wind, light, nuclear and the like is consumed in a large scale; meanwhile, the operators of the steam extraction heat supply generator set can flexibly supply heat to heat users under the condition of guaranteeing electric power, and the normal production of heat utilization enterprises is met. In the accurate test process of the heat supply amount and the electric power operation area of the steam extraction heat supply generating set, under the condition that a heat user can not adjust the heat supply steam flow, the invention provides a method for shunting the heat supply steam by adopting the steam flash tank 22, the heat supply steam flow of the heat supply steam header 6 can be flexibly adjusted, the normal production of a heat using enterprise can not be influenced by the test process, the scheduling reference information can also be provided for operating personnel, meanwhile, the steam working medium is recycled, and the economic loss caused by the fact that the steam working medium is not recycled is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a test system for an operation area of a cogeneration unit in an embodiment of the invention;

fig. 2 is a flowchart of a method for testing an operating area of a cogeneration unit in an embodiment of the present invention;

fig. 3 is a schematic diagram of the heating steam flow range corresponding to different electric powers in the embodiment of the present invention.

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. 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.

Specifically, fig. 1 shows a schematic structural diagram of a test system of an operating area of a cogeneration unit in an embodiment of the present invention, where the cogeneration unit includes: the system comprises a boiler 36, a turbine high-pressure cylinder 37, a turbine intermediate-pressure cylinder 38, a turbine low-pressure cylinder 39, a generating set 29, a condenser 31, a generating set electric power tester 27, a heating steam header 6 and a steam flash tank 22.

Specifically, boiler 36 is supplied from a pipeline 361, boiler 36 and turbine high-pressure cylinder 37 are connected by a steam supply pipeline, boiler 36 and turbine intermediate-pressure cylinder 38 are connected by a steam supply pipeline, turbine high-pressure cylinder 37 and turbine intermediate-pressure cylinder 38 are connected by a steam supply pipeline, and turbine intermediate-pressure cylinder 38 and turbine low-pressure cylinder 39 are connected by a steam supply pipeline; the turbine low-pressure cylinder 39 is provided with a generator set 29 and a condenser 31; the condenser 31 comprises a steam chamber 311 and a water chamber 312, and the water chamber 312 is connected with a condensed water main pipe 32; the heat supply steam header 6 is connected to a steam extraction port of the steam turbine through a steam extraction pipeline 34, one path of the heat supply steam header 6 is supplied to a user through an eighth steam supply pipeline 33, and the other path is connected with the steam flash tank 22; the steam flash tank 22 is connected to the steam chamber 311 through a pipeline, and is connected to the water chamber 312 through a pipeline; one path of the condensed water main pipe 32 is used for draining water, and the other path is connected to the steam flash tank 22; each generator stator of the generator set 29 is connected with a voltage converter 28 and a current converter 30, the output end of the voltage converter 28 is connected with a generator set electric power tester 27, and the output end of the current converter 30 is connected with the generator set electric power tester 27.

Specifically, be provided with extraction pressure measuring device 1 on the extraction pipeline 34, extraction temperature measuring device 2, stop valve 3 before the extraction governing valve, extraction governing valve 4, stop valve 5 behind the extraction governing valve, wherein: the heat supply steam header 6 is connected with the steam extraction regulating valve rear stop valve 5, the steam extraction regulating valve 4 and the steam extraction regulating valve front stop valve 3 through a steam extraction pipeline 34 and a steam extraction port of the steam turbine; and a steam extraction pressure measuring device 1 and a steam extraction temperature measuring device 2 are arranged on a pipeline between the rear stop valve 5 of the steam extraction regulating valve and a steam extraction port of the steam turbine. The turbine extraction opening is located on the sixth steam supply pipeline 381, and the heating steam extracted by the turbine extraction opening is supplied to the pipeline of the turbine low pressure cylinder 39 from the turbine intermediate pressure cylinder 38.

Specifically, a front stop valve 7 of a steam supply regulating valve, a steam supply regulating valve 8, a rear stop valve 9 of the steam supply regulating valve, a heat supply steam pressure measuring device 10, a heat supply steam temperature measuring device 11, a steam supply flow tester 12, a steam supply flow throttling orifice plate 13 and a steam supply flow throttling orifice plate 13 are arranged on a horizontal straight pipe section of the eighth steam supply pipeline 33; and a heating steam temperature measuring device 11 and a heating steam pressure measuring device 10 are arranged in front of the steam flow throttling orifice plate 13. The heat supply steam header 6 is connected with a front stop valve 7 of a steam supply regulating valve, a steam supply regulating valve 8 and a rear stop valve 9 of the steam supply regulating valve through a steam supply pipeline 33, and a steam supply flow measuring device comprising a steam supply flow throttling orifice 13 and a steam supply flow tester 12 is arranged on the steam supply pipeline 33; the steam supply flow throttling orifice plate 13 is arranged on the horizontal straight pipe section; a heating steam temperature measuring device 11 and a heating steam pressure measuring device 10 are arranged in front of the steam flow throttling orifice 13.

Specifically, the eighth steam supply pipeline 33 is connected to the steam flash tank 22 via the steam flash tank regulating valve front stop valve 17, the steam flash tank regulating valve 19, and the steam flash tank regulating valve rear stop valve 20 based on the air supply sub-pipeline 331. The eighth steam supply pipeline 33 may provide heat energy directly to the user in one path, and may provide steam heat energy to the steam flash tank 22 in the other path.

Specifically, the upper part of the steam flash tank 22 is connected with the steam chamber 311 of the condenser 31 through the steam pipe 223, and the steam which is not condensed into water enters the steam chamber 311 of the condenser 31 through the steam pipe 223 and is cooled and condensed into water for recycling; the lower part of the steam flash tank 22 is connected with the water chamber 312 of the condenser 31 through the water flowing pipe 222, and the steam entering the steam flash tank 22 is cooled by the water sprayed, temperature reduced and condensed water to be condensed into water, and then flows into the water chamber 312 of the condenser 31 together for recycling. The condensate water main pipe 32 connected with the condenser 31 is provided with a condensate pump 25 and a condensate water check valve 24, the steam flash tank 22 is connected with the condensate water check valve 24 through a water spray temperature reduction regulating valve 23, the condensate water main pipe 32 after the water spray temperature reduction condensate water comes from the check valve 24 is arranged through the structure and enters the steam flash tank 22 through the water spray temperature reduction regulating valve 23, and the condensate water in the condensate water main pipe 32 comes from the condensate water in the condenser boosted by the condensate pump 25.

Specifically, a heating steam header steam pressure measuring device 14 is arranged on the heating steam header 6, a heating steam header steam temperature measuring device 15 is arranged on the heating steam header, and a safety valve 16 is arranged on the heating steam header. A safety valve 16, a heating steam header steam temperature measuring device 15 and a heating steam header steam pressure measuring device 14 are installed on the heating steam header 6, the overpressure safety valve 16 serves as an overpressure protection device of the heating steam header 6, and when the overpressure safety value is exceeded, the heating steam header 6 depressurizes the empty exhaust steam to prevent the heating steam header 6 from being damaged by overpressure.

Specifically, the heat supply steam header 6 is provided with a steam supply header blowdown pipeline 611, the steam supply header blowdown pipeline 611 is provided with a steam supply header blowdown valve 18, the steam supply header blowdown pipeline 611 can realize blowdown treatment, and the steam supply header blowdown valve 18 can be operated and controlled to complete an external blowdown process.

Specifically, the boiler 36 is connected to the turbine high-pressure cylinder 37 through a first steam supply pipe 365, and is connected to the turbine medium-pressure cylinder 38 through a second steam supply pipe 366; turbine high-pressure cylinder 37 is connected to boiler 36 based on third steam supply pipe 362, and turbine high-pressure cylinder 37 and turbine intermediate-pressure cylinder 38 are connected based on fourth steam supply pipe 369; turbine intermediate pressure cylinder 38 is connected to turbine low pressure cylinder 39 based on fifth steam supply conduit 382 and sixth steam supply conduit 381.

Specifically, the first steam supply pipeline 365 is provided with a first stop valve 367 and a first turbine regulating valve 35, and the stop valve 367 and the first turbine regulating valve 35 can realize the function of regulating the gas flow of the turbine high-pressure cylinder 37 by the boiler 36 on the first steam supply pipeline 365.

Specifically, the second steam supply pipeline 366 is provided with a second steam turbine regulating valve 360, and the second steam turbine regulating valve 360 can realize the function of regulating the gas flow of the steam turbine high-pressure cylinder 37 by the boiler 36 on the second steam supply pipeline 366.

Specifically, the third steam supply pipeline 362 is provided with two check valve steam supply pipelines, the two check valve steam supply pipelines are provided with a first high-pressure cylinder check valve 368 and a second high-pressure cylinder check valve 370, the two check valve steam supply pipelines are connected with the steam turbine high-pressure cylinder 37 based on a parallel connection mode, and the third steam supply pipeline 362 is connected with the boiler 36 through the two check valve steam supply pipelines which are output in parallel to one steam supply pipeline.

Specifically, a third turbine regulating valve 364 is disposed between the first steam supply pipeline 365 and the third steam supply pipeline 362, the third turbine regulating valve is located on the seventh steam supply pipeline 364, one end of the seventh steam supply pipeline 364 is connected to the first steam supply pipeline 365, and the other end is connected to the third steam supply pipeline 362.

Specifically, this condenser includes steam chamber 311 and hydroecium 312, and this hydroecium is connected with condensate water mother pipe 32, is provided with condensate water pump 25 and condensate water check valve 24 on the condensate water mother pipe 32, can realize carrying out the discharge function to the condensate water in hydroecium 312 based on condensate water mother pipe 32 and condensate water pump 25, and condensate water check valve 24 can prevent that water is contrary to getting into hydroecium 312 based on condensate water mother pipe 32.