Condensate pump arrangement structure of back pressure steam turbine and rear steam turbine

Abstract

The utility model discloses an arrangement structure for condensate pumps of a back pressure turbine and a rear turbine, which relates to the technical field of energy technology and comprises a rear turbine condenser, a rear turbine condensate pump and a rear turbine shaft seal cooler, the rear turbine condenser is connected with the rear turbine condensate pump through a rear turbine condensate pipeline, and the rear turbine condensate pump is connected with the rear turbine shaft seal cooler through a rear turbine condensate pipeline. A rear-mounted machine condensate pump is connected with a back pressure machine condensate water main pipe at an outlet of a back pressure machine condensate water pump through a condensate water pipeline, a back pressure machine vacuum deaerator is communicated with the back pressure machine condensate water pump and a back pressure machine iron remover, and one side of the back pressure machine iron remover is communicated with a back pressure machine shaft seal cooler and a waste heat boiler. According to the utility model, the back-pressure turbine shaft seal heater, the back-pressure turbine condensate pump and the condenser are additionally arranged, and a condensate system of the back-pressure turbine is connected, so that steam discharged by the back-pressure turbine originally can be utilized by the back-pressure turbine to generate electricity, and the energy utilization rate is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of energy technology, and in particular to an arrangement structure of a back-pressure steam turbine and a rear-mounted steam turbine condensate pump. Background Technology

[0002] In recent years, my country has successively constructed gas turbine generator sets for combined heat and power (CHP). To maximize heat supply, the gas turbines were configured as back-pressure turbines. However, due to changes in industrial structure and market demand for heat, electricity supply remains tight. When heat supply is insufficient, the gas turbine operates under back-pressure turbine power generation, requiring steam emissions. This results in economic losses and energy waste, as well as noise pollution affecting the lives of surrounding residents. To avoid the shutdown of back-pressure turbine generator sets and address the power shortage, the back-pressure turbines are being modified into turbine generator sets capable of both power generation and heat supply, utilizing the emitted steam to generate electricity and improve energy efficiency.

[0003] In the prior art, patent publication number CN119435153A discloses a saturated steam (supply) system for a supplementary steam turbine, which includes a main steam pipeline, a supplementary steam pipeline, a condenser and a steam turbine generator. This comparative technology is a conventional steam turbine technology, which has poor overall power generation efficiency and low energy utilization. Utility Model Content

[0004] The purpose of this invention is to solve the problem of low energy utilization in existing structures. This invention connects the condensate system of the back-pressure turbine by adding a rear-mounted turbine shaft seal heater, a rear-mounted turbine condensate pump, and a condenser, so that the steam discharged from the back-pressure turbine can generate electricity through the rear turbine, thereby increasing the power generation efficiency. This invention provides a high-efficiency back-pressure turbine and rear-mounted turbine condensate pump arrangement structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a back-pressure turbine and a downstream turbine condensate pump arrangement structure, including a downstream turbine condenser, a downstream turbine condensate pump, and a downstream turbine shaft seal cooler. The downstream turbine condenser is connected to the downstream turbine condensate pump via a downstream turbine condensate pipe. The downstream turbine condensate pump is connected to the back-pressure turbine condensate header pipe at the outlet of the back-pressure turbine condensate pump via a condensate pipe. The back-pressure turbine vacuum deaerator is connected to the back-pressure turbine condensate pump and the back-pressure turbine iron separator. One side of the back-pressure turbine iron separator is connected to the back-pressure turbine shaft seal cooler and the waste heat boiler.

[0006] Preferably, the system also includes two post-heater condensate pumps connected to the post-heater condenser via two condensate pipes, with the two post-heater condensate pumps connected in parallel.

[0007] Preferably, the rear-mounted engine shaft seal cooler is connected to the rear-mounted engine condenser by two condensate pipes.

[0008] Preferably, the back pressure vacuum deaerator is connected to the back pressure condensate pump via a condensate pipe, and the back pressure condensate pump is connected to the back pressure condensate header at the pump outlet via a condensate pipe.

[0009] Preferably, the outlet of the back pressure condensate pump is connected to the back pressure condensate header via the back pressure condensate header, and the back pressure condensate separator is connected to the waste heat boiler via a condensate pipe.

[0010] Preferably, the back pressure condensate pump is connected to the back pressure vacuum deaerator via a condensate pipeline.

[0011] Preferably, the condensate from the back pressure compressor is transported to the waste heat boiler via the outlet header of the back pressure compressor condensate pump.

[0012] Preferably, the condensate pump of the post-heater transports the condensate in the post-heater condenser to the outlet header of the back pressure condensate pump via a pipeline system.

[0013] Preferably, the back pressure condensate pump delivers the condensate from the vacuum deaerator of the back pressure unit to the outlet header of the back pressure condensate pump via a pipeline connection system.

[0014] Preferably, the condensate pump of the post-processor and the condensate pump of the back pressure unit are connected in parallel.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: By adding a rear turbine shaft seal heater, a rear turbine condensate pump, and a condenser, this utility model connects the condensate system of the back pressure turbine, enabling the steam originally discharged from the back pressure turbine to be used by the rear turbine for power generation, thereby effectively improving energy utilization, achieving higher power generation efficiency, and achieving the technical effects of efficient energy utilization and improved power generation performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 Enlarged view of the local structure at point C.

[0018] In the diagram: 1. Post-heater condenser; 2. Post-heater condensate pump; 3. Post-heater shaft seal cooler; 4. Back-pressure compressor vacuum deaerator; 5. Back-pressure compressor condensate pump; 6. Back-pressure compressor iron separator; 7. Back-pressure compressor shaft seal cooler; 8. Waste heat boiler. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. The described embodiments are only some embodiments of this utility model, and not all embodiments.

[0020] Example 1: Refer to Figures 1 to 2 This embodiment relates to an innovative arrangement structure of a back-pressure steam turbine and a rear-mounted steam turbine condensate pump. This structure has shown many advantages in design and practical application, effectively improving operating efficiency and energy utilization. Its specific composition and connection method will be described in detail below.

[0021] The structure includes a post-heater condenser 1, which is connected to a post-heater condensate pump 2 via a post-heater condensate pipeline. This connection ensures that condensate can be smoothly and efficiently transferred from the condenser to the condensate pump, laying the foundation for subsequent recycling. The post-heater condensate pump 2 is then connected to the back-pressure turbine condensate header at the outlet of the back-pressure turbine condensate pump 5 via a condensate pipeline, making the water resource recycling of the entire system more rational and efficient, reducing energy waste, and improving energy utilization.

[0022] In the back-pressure compressor section, the vacuum deaerator 4 plays a crucial deoxygenation role. It connects to the back-pressure compressor condensate pump 5 and the back-pressure compressor iron separator 6. This effectively removes oxygen and other gaseous impurities from the condensate, ensuring the quality of condensate entering subsequent equipment, reducing corrosion and damage, and extending equipment lifespan. Simultaneously, the back-pressure compressor iron separator 6 connects to the back-pressure compressor shaft seal cooler 7 and the waste heat boiler 8, further optimizing the system's water treatment and waste heat utilization processes. This makes the entire system more stable and reliable during operation, and ensures more efficient energy utilization.

[0023] Furthermore, this embodiment also includes two post-condensity water pumps 2, which are connected to the post-condenser 1 via two condensate pipes and are connected in parallel. This design not only improves the system's water supply capacity, meeting the condensate flow requirements under different operating conditions, but also enhances the system's reliability and stability. When one condensate pump fails or requires maintenance, the other pump can still operate normally, ensuring continuous system operation and avoiding production interruptions due to equipment failure, thereby guaranteeing the smooth operation of the entire production process.

[0024] The post-engine shaft seal cooler 3 is also an important component of this structure. It is connected to the post-engine condenser 1 by two condensate pipes. In this way, the shaft seal steam can be effectively cooled, the temperature of the shaft seal steam can be reduced, and damage to the equipment caused by high-temperature steam can be avoided. At the same time, the heat in the shaft seal steam can be recovered, further improving energy utilization efficiency, reducing energy loss, and realizing the recycling of energy.

[0025] Regarding the connection between the back-pressure vacuum deaerator 4 and the back-pressure condensate pump 5, a condensate pipeline is used for connection. This connection method is simple, reliable, and easy to maintain and repair. Simultaneously, the back-pressure condensate pump 5 is also connected to the back-pressure condensate header at its outlet via a condensate pipeline, ensuring smooth flow of condensate within the back-pressure system and providing strong support for the stable operation of the entire system.

[0026] The outlet of the back-pressure compressor condensate pump 5 is connected to the back-pressure compressor condensate header pipe to the back-pressure compressor iron separator 6. This connection design allows the condensate, pressurized by the condensate pump, to smoothly enter the iron separator for iron removal treatment, removing iron impurities from the water, ensuring water purity, preventing damage to downstream equipment from iron impurities, and improving system operating efficiency and safety. The back-pressure compressor iron separator 6 is connected to the waste heat boiler 8 via a condensate pipeline, further realizing the recovery and utilization of waste heat from the condensate. The iron-removed condensate is sent to the waste heat boiler to fully utilize its waste heat, improve energy efficiency, reduce energy consumption, and achieve the goals of energy conservation and emission reduction.

[0027] The back pressure condensate pump 5 is also connected to the back pressure vacuum deaerator 4 via a condensate pipeline, forming a closed loop system. This allows the condensate to be continuously recycled within the system, reducing dependence on external water sources, lowering production costs, and reducing wastewater discharge, which is of positive significance for environmental protection.

[0028] Example 2: Refer to Figures 1 to 2 This embodiment relates to an innovative arrangement structure of a back-pressure steam turbine and a rear-mounted steam turbine condensate pump. This structure has shown many advantages in design and practical application, effectively improving the operating efficiency and energy utilization level of the entire system. Its specific composition and connection method will be described in detail below.

[0029] First, the structure includes the post-turbine condenser 1, a key component that plays a crucial role in the system. The post-turbine condenser 1 is connected to the post-turbine condensate pump 2 via a post-turbine condensate pipeline. This connection ensures that condensate can be smoothly and efficiently transferred from the condenser to the pump, laying the foundation for subsequent recycling. Specifically, the post-turbine condenser 1 is responsible for condensing the steam discharged from the post-turbine turbine, converting it into condensate. This process not only recovers the latent heat of the steam but also provides an important source for the system's water resource recycling. The post-turbine condensate pump 2 is responsible for pressurizing the condensate, enabling it to be smoothly delivered to the back-compressor condensate header at the outlet of the back-compressor condensate pump 5, achieving effective integration of the post-turbine and back-compressor condensate systems. This ingenious connection design integrates the condensate systems of the post-turbine and back-compressor, making the entire system's water resource recycling more rational and efficient, reducing energy waste, and improving energy utilization. In this way, the system can maximize the recycling and utilization of condensate, reduce dependence on external water sources, and also reduce wastewater discharge, which is of positive significance for environmental protection.

[0030] In the back-pressure compressor section, the back-pressure compressor vacuum deaerator 4 plays a crucial deoxygenation role. It connects the back-pressure compressor condensate pump 5 and the back-pressure compressor iron separator 6. This effectively removes oxygen and other gaseous impurities from the condensate, ensuring the quality of condensate entering subsequent equipment, reducing corrosion and damage, and extending equipment lifespan. Specifically, the back-pressure compressor vacuum deaerator 4 utilizes a vacuum environment to separate dissolved oxygen and other gaseous impurities from the condensate, ensuring high purity of the condensate entering the back-pressure compressor iron separator 6. This process not only improves system operating efficiency but also effectively reduces equipment maintenance costs. Simultaneously, the back-pressure compressor iron separator 6 connects to the back-pressure compressor shaft seal cooler 7 and the waste heat boiler 8, further optimizing the system's water treatment and waste heat utilization processes. The back-pressure compressor iron separator 6 uses magnetic materials to remove iron impurities from the condensate, ensuring the quality of the condensate entering the waste heat boiler 8 and preventing damage to the boiler from iron impurities. The waste heat boiler 8 utilizes the waste heat from the condensate for heating, further improving energy efficiency, reducing energy consumption, and achieving the goals of energy conservation and emission reduction. This series of designs makes the entire system more stable and reliable during operation, and ensures more efficient energy utilization.

[0031] This embodiment also includes two post-condensate pumps 2, which are connected to the post-condensate 1 via two separate condensate pipes and are connected in parallel. This design not only improves the system's water supply capacity, meeting the condensate flow requirements under different operating conditions, but also enhances the system's reliability and stability. Specifically, when one condensate pump fails or requires maintenance, the other pump can still operate normally, ensuring continuous system operation and avoiding production interruptions due to equipment failure, thereby guaranteeing the smooth progress of the entire production process. In this way, the system can maintain a stable operating state under various operating conditions, improving production efficiency and reducing production costs.

[0032] The post-heater shaft seal cooler 3 is also an important component of this structure. It is connected to the post-heater condenser 1 via two condensate pipes. This effectively cools the shaft seal steam, reducing its temperature and preventing damage to the equipment from high-temperature steam. Simultaneously, it recovers heat from the shaft seal steam, further improving energy efficiency, reducing energy loss, and achieving energy recycling. Specifically, the post-heater shaft seal cooler 3 uses condensate to cool the shaft seal steam, lowering its temperature to a safe range, thereby protecting the normal operation of the equipment. Furthermore, the heat recovered during the cooling process can be reused, improving the system's energy efficiency and reducing energy waste.

[0033] Regarding the connection between the back-pressure vacuum deaerator 4 and the back-pressure condensate pump 5, a condensate pipeline is used for connection. This connection method is simple, reliable, and easy to maintain and repair. Specifically, the back-pressure vacuum deaerator 4 delivers treated condensate to the back-pressure condensate pump 5 through the condensate pipeline, ensuring smooth condensate flow. Simultaneously, the back-pressure condensate pump 5 is also connected to the back-pressure condensate header at its outlet via a condensate pipeline, ensuring smooth condensate flow within the back-pressure system and providing strong support for the stable operation of the entire system. In this way, the system can efficiently recycle condensate, improving operating efficiency and reducing maintenance costs.

[0034] The outlet of the back-pressure compressor condensate pump 5 is connected to the back-pressure compressor iron separator 6 via the back-pressure compressor condensate header. This connection design allows the condensate, pressurized by the condensate pump, to smoothly enter the iron separator for iron removal treatment, removing iron impurities from the water, ensuring water purity, preventing damage to downstream equipment from iron impurities, and improving system operating efficiency and safety. Specifically, the back-pressure compressor condensate pump 5 pressurizes the condensate and then transports it to the back-pressure compressor iron separator 6 through the back-pressure compressor condensate header. The iron separator uses magnetic materials to remove iron impurities from the water, ensuring the quality of the condensate entering the waste heat boiler 8. The back-pressure compressor iron separator 6 is connected to the waste heat boiler 8 via a condensate pipeline, further realizing the recovery and utilization of waste heat from the condensate. The iron-removed condensate is sent to the waste heat boiler to fully utilize its waste heat, improve energy utilization efficiency, reduce energy consumption, and achieve the goal of energy conservation and emission reduction. Through this series of designs, the system can operate efficiently while minimizing energy waste and reducing production costs.

[0035] The back-pressure compressor condensate pump 5 is connected to the back-pressure compressor vacuum deaerator 4 via a condensate pipeline, ensuring efficient transfer of condensate from the vacuum deaerator to the condensate pump. This connection method not only improves system operating efficiency but also effectively reduces energy consumption. Specifically, the back-pressure compressor vacuum deaerator 4 removes dissolved oxygen and other gaseous impurities from the condensate, thereby improving condensate quality, reducing corrosion and damage to equipment, and extending equipment lifespan. The deaerated condensate enters the back-pressure compressor condensate pump 5 through the condensate pipeline, is then pressurized and transported to the outlet header of the back-pressure compressor condensate pump 5, and subsequently to the waste heat boiler 8. This process not only ensures efficient utilization of condensate but also achieves waste heat recovery, improving energy efficiency.

[0036] The post-condensate pump 2 transports condensate from the post-condensate 1 to the outlet header of the back-pressure condensate pump 5 via a pipeline system, further optimizing the system's water resource circulation. The post-condensate pump 2 and the back-pressure condensate pump 5 are connected in parallel. This design not only improves the system's water supply capacity, meeting the condensate flow requirements under different operating conditions, but also enhances the system's reliability and stability. When one condensate pump fails or requires maintenance, the other pump can still operate normally, ensuring continuous system operation and avoiding production interruptions due to equipment failure, thus guaranteeing the smooth operation of the entire production process.

[0037] The back-pressure turbine condensate pump 5 also sends condensate from the back-pressure turbine vacuum deaerator 4 to the outlet header of the back-pressure turbine condensate pump 5 via a pipeline connection system, forming a closed-loop circulation system. This design allows condensate to be continuously recycled within the system, reducing dependence on external water sources, lowering production costs, and also reducing wastewater discharge, which is of positive significance for environmental protection. Through these reasonable and ingenious connection methods and component combinations, the back-pressure turbine and rear-mounted turbine condensate pump arrangement structure achieves efficient energy utilization, stable system operation, and reduced production costs.

[0038] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

Claims

1. A back pressure turbine and post turbine condensate pump arrangement, characterized by, The back-turbine condenser is connected with the back-turbine condensate pump through a back-turbine condensate pipeline, the back-turbine condensate pump is connected with the back-pressure machine condensate pump outlet back-pressure machine condensate mother pipeline through a condensate pipeline, the back-pressure machine vacuum deaerator is connected with the back-pressure machine condensate pump and the back-pressure machine iron remover, and the back-pressure machine iron remover is connected with the back-pressure machine shaft seal cooler and the waste heat boiler.

2. A back pressure turbine and post turbine condensate pump arrangement according to claim 1, characterised in that, The two back-turbine condensate pumps are connected with the back-turbine condenser through two condensate pipelines respectively, and the two back-turbine condensate pumps are connected in parallel.

3. A back pressure turbine and post turbine condensate pump arrangement according to claim 1 or 2, characterised in that, The back-turbine shaft seal cooler is connected with the back-turbine condenser through two condensate pipelines.

4. A back pressure turbine and post turbine condensate pump arrangement according to claim 1 or 2, characterised in that, The back-pressure machine vacuum deaerator is connected with the back-pressure machine condensate pump through a condensate pipeline, and the back-pressure machine condensate pump is connected with the back-pressure machine condensate pump outlet back-pressure machine condensate mother pipeline through a condensate pipeline.

5. A back pressure turbine and post turbine condensate pump arrangement according to claim 4, characterised in that, The back-pressure machine condensate pump outlet is connected with the back-pressure machine iron remover through a back-pressure machine condensate mother pipeline, and the back-pressure machine iron remover is connected with the waste heat boiler through a condensate pipeline.

6. A back pressure turbine and post turbine condensate pump arrangement according to claim 1 or 5, characterised in that, The back-pressure machine condensate pump is connected with the back-pressure machine vacuum deaerator through a condensate pipeline.

7. A back pressure turbine and post turbine condensate pump arrangement according to claim 1 or 5, characterised in that, The back-pressure machine condensate is transported to the waste heat boiler through a back-pressure machine condensate pump outlet mother pipeline.

8. A back pressure turbine and post turbine condensate pump arrangement according to claim 7, characterised in that, The back-turbine condensate pump is connected with the back-pressure machine condensate pump outlet mother pipeline through a pipeline system to transport the condensate in the back-turbine condenser.

9. A back pressure turbine and post turbine condensate pump arrangement according to claim 1 or 8, characterised in that, The back-pressure machine condensate pump is connected with the back-pressure machine vacuum deaerator through a pipeline connection system to send the condensate in the back-pressure machine vacuum deaerator to the back-pressure machine condensate pump outlet mother pipeline.

10. A back pressure turbine and post turbine condensate pump arrangement according to claim 1 or 8, characterised in that, The back-turbine condensate pump and the back-pressure machine condensate pump are connected in parallel.

Images