Power plant extension interconnection management system

Abstract

The invention discloses a power plant extension interconnection management system, and the system comprises a first-stage power plant system which comprises a natural gas system, an instrument air system, a centralized nitrogen generation system, an auxiliary heat supply system, an industrial water system, a demineralized water system, a fire extinguishing system, a raw water system, a tap water system, a drainage system, and an auxiliary power system; the second-stage power plant system comprises a group of natural gas system, an instrument air system, a centralized nitrogen generation system, an auxiliary heat supply system, an industrial water system, a demineralized water system, a fire extinguishing system, a raw water system, a tap water system, a drainage system and an auxiliary power system; according to the system, interconnection of natural gas systems, compressed air systems, nitrogen systems, industrial water systems, raw water systems, fire fighting water systems, demineralized water systems, tap water systems, wastewater drainage systems, auxiliary steam systems, auxiliary power systems and the like in first-stage and second-stage power plant systems is achieved, second-stage configuration can be optimized, investment can be saved, sufficient convenience is achieved in subsequent debugging, and the debugging progress is greatly promoted.

Description

Technical Field

[0001] The invention relates to a power plant expansion interconnection management system, in particular to a power plant expansion interconnection management system. Background Art

[0002] With the continuous deepening of my country's economic system reform, further developing and improving the project management of power construction projects so that power companies can develop sustainably and healthily has become an issue that the power industry urgently needs to study and solve.

[0003] However, when the existing power plant is expanded, it is impossible to interconnect the natural gas, compressed air, nitrogen, industrial water, raw water, fire water, desalted water, tap water, wastewater drainage, auxiliary steam, plant electricity and other systems of the first and second phase power plants, resulting in the inability to optimize the second phase configuration and save investment, and reducing the convenience of subsequent debugging. Therefore, we proposed a power plant expansion interconnection management system. Summary of the invention

[0004] The object of the present invention is to provide a power plant expansion interconnection management system to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A power plant expansion interconnection management system, comprising:

[0007] The first phase power plant system includes a natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system;

[0008] The second phase power plant system includes a natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system;

[0009] The natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system in the first phase power plant system and the natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system in the second phase power plant system are all interconnected.

[0010] As a further solution of the present invention: the natural gas system in the first-phase power plant system includes two natural gas pipelines for dedicated gas supply lines, and the natural gas system in the second-phase power plant system includes a pressure regulating station.

[0011] As a further solution of the present invention: the instrument air system in the first phase power plant system includes 4 air compressors, 2 9E gas turbines with 2 6.8Nm 3 / min air compressor; 2 steam engines with 2 10Nm 3 / min air compressor, the instrument air system in the second phase power plant system includes 2 20Nm 3 / min screw air compressor.

[0012] As a further solution of the present invention: the auxiliary heating system in the first-phase power plant system includes a heating system, the auxiliary heating system in the second-phase power plant system includes an auxiliary steam system, and the heating system includes two steam turbines and a heating boiler.

[0013] As a further solution of the present invention: the industrial water system in the first phase power plant system includes three 200m 3 / h industrial water pump.

[0014] As a further solution of the present invention: the desalted water system in the first phase power plant system includes a boiler feed water system, a secondary reverse osmosis system, a variable frequency desalted water pump (35t / h), a safety filter before EDI, and a 1000m 3 Desalinated water tank and 50m 3 Desalinated water tank.

[0015] As a further solution of the present invention: the fire protection system of the first-phase power plant system includes two fire water pumps and a fire pressure-stabilizing pump, and the fire protection system of the second-phase power plant system includes a fire pressure-stabilizing tank.

[0016] As a further solution of the present invention: the raw water system of the first phase power plant system includes a mechanical accelerated clarifier, and the raw water system of the second phase power plant system includes a treatment capacity of 800m 3 / h raw water pretreatment system.

[0017] As a further solution of the present invention: the drainage system in the first-phase power plant system mainly includes boiler drainage, cooling industrial water, and clean circulating water sewage. Since the units in the first-phase power plant system are zero-discharge units, the industrial wastewater enters the reuse water pool after passing through the regulating tank and the sewage treatment line, and is finally discharged through greening water.

[0018] As a further solution of the present invention: the plant power system in the first phase power plant system is equipped with a 6 kV diesel generator with a black start function through the unit, and the plant power system in the second phase power plant system is equipped with a diesel generator as a safety power supply and a black start function through the unit.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The power plant expanded the interconnection management system to achieve the interconnection of the first and second phase natural gas, compressed air, nitrogen, industrial water, raw water, fire water, desalted water, tap water, wastewater drainage, auxiliary steam, plant power and other systems. It can not only optimize the second phase configuration and save investment, but also achieve full convenience in the subsequent commissioning, which has a great promoting effect on the commissioning progress; at the same time, affected by the external natural gas ventilation and raw water intake construction progress, the natural gas system, industrial water system and raw water system are interconnected and interoperable, and the bottleneck problem of water supply and ventilation is solved in a forward-looking manner. Considering the possibility of lag in the construction of the dedicated gas supply pipeline, the natural gas interconnection design is cleverly used to supply gas to the pressure regulating station using two natural gas pipelines, and actively coordinate the expansion of the natural gas flow of the pipeline. The expanded natural gas flow can meet the gas demand for power generation of two units and one unit in the first phase at the same time. The industrial water pipeline network is used to supply circulating water to meet the water intake and industrial water needs in advance when the pump station is not completed, so that the commissioning and commissioning of the two units are not affected by the lag in the construction of the dedicated gas supply line, which is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the interconnection management system for power plant expansion in the present invention. DETAILED DESCRIPTION

[0022] In one embodiment, Figure 1 As shown, a power plant expansion interconnection management system includes:

[0023] The first phase power plant system includes a natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system;

[0024] The second phase power plant system includes a natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system;

[0025] The natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system in the first phase power plant system are interconnected with the natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system in the second phase power plant system;

[0026] The interconnection of the first and second phase natural gas, compressed air, nitrogen, industrial water, raw water, fire water, desalted water, tap water, wastewater drainage, auxiliary steam, plant electricity and other systems can not only optimize the second phase configuration and save investment, but also achieve full convenience in subsequent debugging, which greatly promotes the debugging progress.

[0027] The natural gas system in the first phase power plant system includes two natural gas pipelines for gas supply, and the natural gas system in the second phase power plant system includes a pressure regulating station. The two natural gas pipelines for the first phase power plant system supply gas to the pressure regulating station of the second phase power plant system, and the natural gas flow of the first phase power plant system gas supply line is expanded. The expanded natural gas flow can meet the gas demand of two units in the second phase power plant system and one unit in the first phase power plant system for simultaneous power generation; the centralized nitrogen production system in the first phase power plant system and the second phase power plant system includes a 300Nm 3 / h adsorption nitrogen generator, the nitrogen produced by the nitrogen generator is provided to the waste heat boiler and weather pipeline system as maintenance or replacement gas;

[0028] The instrument air system in the first phase power plant system includes 4 air compressors, 2 9E gas turbines and 2 6.8Nm 3 / min air compressor; 2 steam engines with 2 10Nm 3 / min air compressor, the instrument air system in the second phase power plant system includes 2 20Nm 3 / min screw air compressor; after the Phase I power plant system and the Phase II power plant system instrument air system are interconnected, the two air compressors in the Phase II power plant system are the main operating air compressors of the power plant instrument air system, the two steam turbine air compressors in the Phase I power plant system are the first backup air compressors, and the two gas turbine air compressors in the Phase I power plant system are the second backup air compressors. At the same time, the compressed air of the Phase II power plant system, which has been dried, is supplied to the power plant, solving the problem of high humidity in the compressed air system that has long plagued the Phase I power plant system.

[0029] The auxiliary heating system in the first phase power plant system includes a heating system, and the auxiliary heating system in the second phase power plant system includes an auxiliary steam system. The heating system includes two steam turbines and a heating boiler. The unit extraction steam in the heating system provides steam for chemical cleaning of the waste heat boiler. The heating system starts the boiler and the steam turbine extracts steam. The auxiliary steam system starts the boiler to provide auxiliary steam. The unit cold re-extraction steam in the auxiliary steam system can also be used for external heating after being reduced in temperature and pressure. It can flexibly realize the unit auxiliary steam supply and external heating according to actual needs;

[0030] The industrial water system in the first phase of the power plant system includes three 200m 3 / h industrial water pump; in summer, 3 industrial water pumps need to be operated simultaneously to meet the circulating water replenishment demand, and 2 industrial water pumps need to be operated in winter. Due to the cooling needs of the boiler fixed-discharge expansion tank of the second-phase power plant system unit, the industrial water pumps need to be kept running during the operation of the second-phase power plant system unit. Therefore, the industrial water connection of the first and second phase power plant systems needs to consider the water supply and the stability of the operation of the first-phase power plant system units. In order to ensure the stability of the units, the connection construction is carried out in winter when the unit load is low. At the same time, the upgrade and transformation of one industrial water pump must be completed before the connection to ensure the stability of the operation of the first-phase power plant system units and the water supply flow.

[0031] The desalted water system in the first phase power plant system includes boiler feed water system, secondary reverse osmosis system, variable frequency desalted water pump (35t / h), additional safety filter before EDI, 1000m 3 Desalinated water tank and 50m 3 The desalted water tank effectively ensures the stability of the water supply to the unit through the variable frequency desalted water pump;

[0032] The fire protection system of the Phase I power plant system includes two fire water pumps and a fire pressure regulating pump, and the fire protection system of the Phase II power plant system includes a fire pressure regulating tank;

[0033] The raw water system of the first phase power plant system includes a mechanical accelerated clarifier, and the raw water system of the second phase power plant system includes a treatment capacity of 800m 3 / h raw water pretreatment system; the mechanical accelerated clarifier is equipped with a raw water pretreatment interface, and during the unit commissioning phase of the second phase power plant system, the water supply to the commissioning unit is completely dependent on the mechanical accelerated clarifier in the first phase power plant system, ensuring the smooth progress of the commissioning process; through the interconnection construction of the raw water system of the first phase power plant system and the second phase power plant system, the resources of the dual pumping stations can be fully utilized to achieve diversified operation modes and water source selection, thereby improving the reliability of raw water supply;

[0034] The drainage system in the first phase power plant system mainly includes boiler drainage, cooling industrial water, and clean circulating water sewage. Since the units in the first phase power plant system are zero-discharge units, industrial wastewater enters the reuse water pool after passing through the regulating tank and sewage treatment line, and is finally discharged through greening water;

[0035] The plant power system in the first phase power plant system is equipped with a 6kV diesel generator with a black start function, and the plant power system in the second phase power plant system is equipped with a diesel generator as a safety power supply and a black start function.

[0036] The present invention realizes the interconnection of the first and second phase natural gas, compressed air, nitrogen, industrial water, raw water, fire water, desalted water, tap water, wastewater drainage, auxiliary steam, plant electricity and other systems, which can not only optimize the second phase configuration and save investment, but also realize full convenience in the subsequent debugging, which has a great promoting effect on the debugging progress; at the same time, affected by the external natural gas ventilation and raw water intake construction progress, the natural gas system, industrial water system and raw water system realize interconnection design, and prospectively solve the bottleneck problem of water supply and ventilation. Considering the possibility of lag in the construction of the dedicated gas supply line pipeline, the natural gas interconnection design is cleverly used to supply gas to the pressure regulating station using two natural gas pipelines, and actively coordinate the expansion of the natural gas flow of the pipeline. The expanded natural gas flow can meet the gas demand for power generation of 2 units and 1 unit in the first phase at the same time. The industrial water pipeline network is used to supply circulating water to meet the water intake and industrial water needs in advance when the pump station is not completed, so that the commissioning and commissioning of the two units are not affected by the lag in the construction of the dedicated gas supply line, which is relatively convenient.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power plant expansion interconnection management system, characterized in that: include: The first phase power plant system includes a natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system; The second phase power plant system includes a natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system; The natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system in the first phase power plant system and the natural gas system, instrument air system, centralized nitrogen production system, auxiliary heating system, industrial water system, desalted water system, fire protection system, raw water system, tap water system, drainage system, and plant power system in the second phase power plant system are all interconnected.

2. A power plant expansion interconnection management system according to claim 1, characterized in that: The natural gas system in the first-phase power plant system includes two natural gas pipelines for gas supply, and the natural gas system in the second-phase power plant system includes a pressure regulating station.

3. A power plant expansion interconnection management system according to claim 1, characterized in that: The instrument air system in the first phase power plant system includes 4 air compressors, 2 9E gas turbines and 2 6.8Nm 3 / min air compressor; 2 steam engines with 2 10Nm 3 / min air compressor, the instrument air system in the second phase power plant system includes 2 20Nm 3 / min screw air compressor.

4. A power plant expansion interconnection management system according to claim 1, characterized in that: The auxiliary heating system in the first-phase power plant system includes a heating system, and the auxiliary heating system in the second-phase power plant system includes an auxiliary steam system. The heating system includes two steam turbines and a heating boiler.

5. A power plant expansion interconnection management system according to claim 1, characterized in that: The industrial water system in the first phase power plant system includes three 200m 3 / h industrial water pump.

6. A power plant expansion interconnection management system according to claim 1, characterized in that: The desalted water system in the first phase power plant system includes a boiler feed water system, a secondary reverse osmosis system, a variable frequency desalted water pump, a safety filter before EDI, and a 1000m 3 Desalination tank and 50m 3 Demineralized water tank.

7. A power plant expansion interconnection management system according to claim 1, characterized in that: The fire protection system of the first-phase power plant system includes two fire water pumps and a fire pressure-stabilizing pump, and the fire protection system of the second-phase power plant system includes a fire pressure-stabilizing tank.

8. The power plant expansion interconnection management system according to claim 1, characterized in that: The raw water system of the first phase power plant system includes a mechanical accelerated clarifier, and the raw water system of the second phase power plant system includes a treatment capacity of 800m 3 / h raw water pretreatment system.

9. A power plant expansion interconnection management system according to claim 1, characterized in that: The drainage system in the first-phase power plant system mainly includes boiler drainage, cooling industrial water, and clean circulating water sewage. Since the units in the first-phase power plant system are zero-discharge units, the industrial wastewater enters the reuse water pool after passing through the regulating tank and the sewage treatment line, and is finally discharged through greening water.

10. A power plant expansion interconnection management system according to claim 1, characterized in that: The plant power system in the first phase power plant system has a black start function through the unit equipped with a 6 kV diesel generator, and the plant power system in the second phase power plant system has a diesel generator as a safety power supply and a black start function.

Images