High-efficiency vacuum system for generator set

Abstract

The utility model relates to a high-efficiency vacuum system for a generator set. The high-efficiency vacuum system comprises a condenser (1), a roots vacuum pump (2) and a water ring vacuum pump (3) which are sequentially connected in series, an air inlet of the condenser (2) is connected with an exhaust port of a generator set condenser, and an exhaust port of the condenser (2) is connected with an air inlet of the roots vacuum pump (2); an air inlet of the roots vacuum pump (2) is connected with an air inlet of an original vacuum pump of the generator set in parallel, and an air outlet is connected with an air inlet of the water ring vacuum pump (3). The vacuum suction capacity is high, the vacuum degree of a generator set system can be effectively improved, and the power generation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a high-efficiency vacuum system for a generator set, belonging to the technical field of vacuum equipment. Background Art

[0002] In the vacuum system of a thermal power generator set, turbine exhaust steam is cooled by the condenser, and non-condensable gases are extracted by a water ring vacuum pump before being discharged through a steam-water separator. The water ring vacuum pump plays a crucial role, discharging non-condensable gases from the negative pressure equipment to the atmosphere. After prolonged operation, the performance of the cold-end equipment of a generator set generally declines due to factors such as reduced condensing capacity and system leaks. This in turn leads to a decrease in power generation efficiency and increased energy consumption. Generally, a decrease in vacuum level of 1 kPa results in a 1-2% decrease in power generation efficiency. Due to the limited vacuum capacity of existing water ring vacuum pumps for generator sets, they are unable to compensate for the decrease in vacuum level caused by prolonged operation, resulting in a continuous decline in the unit's power generation efficiency. Therefore, a vacuum system for generator sets with strong vacuum suction capabilities is urgently needed to improve the unit's vacuum level and power generation efficiency. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a vacuum system for a generator set with strong vacuum suction capacity, so as to improve the vacuum degree of the unit and improve the power generation efficiency.

[0004] The purpose of this utility model is achieved in this way:

[0005] A high-efficiency vacuum system for a generator set comprises a condenser, a Roots vacuum pump and a water ring vacuum pump connected in series in sequence; the air inlet of the condenser is connected to the exhaust port of the generator set condenser, and the exhaust port is connected to the air inlet of the Roots vacuum pump; the air inlet of the Roots vacuum pump is connected in parallel to the air inlet of the original vacuum pump of the generator set, and the air outlet is connected to the air inlet of the water ring vacuum pump.

[0006] Furthermore, a first heat exchanger is provided in the condenser, a second heat exchanger is provided in the Roots vacuum pump, and a third heat exchanger is provided in the water ring vacuum pump.

[0007] Furthermore, the first heat exchanger, the second heat exchanger and the third heat exchanger are connected in parallel to cool the circulating water.

[0008] Furthermore, pressure gauges and temperature gauges are installed on the inlet and outlet pipes of the condenser, Roots vacuum pump and water ring vacuum pump.

[0009] Furthermore, an electric-controlled valve is provided on the air inlet pipeline of the Roots vacuum pump.

[0010] Furthermore, the exhaust port of the water ring vacuum pump is connected to a steam-water separator.

[0011] Compared with the prior art, the utility model has the advantages of

[0012] The utility model discloses a condenser is connected in series between the original condenser and the original vacuum pump of generator unit, and the original vacuum pump is connected in parallel with the series connection of the Roots vacuum pump and the water ring vacuum pump of condenser, utilizes the condenser to carry out cooling and temperature reduction to the saturated wet air that sucks out from the original condenser, the condensation and recovery of condensable gas, alleviates the suction load of the vacuum pump of later course, utilizes the Roots vacuum pump and the water ring vacuum pump and the original vacuum pump parallel connection, can improve the suction capacity of vacuum system greatly, improves the ultimate vacuum degree greatly simultaneously, and then improves the power generation efficiency of generator unit. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the connection structure diagram of the utility model a kind of high-efficiency vacuum system for generator unit.

[0014] Among them:

[0015] Condenser 1, Roots vacuum pump 2, water ring vacuum pump 3, first heat exchanger 4, second heat exchanger 5, third heat exchanger 6, electric control valve 7, steam-water separator 8. DETAILED DESCRIPTION

[0016] Refer to Figure 1 The utility model relates to a kind of high-efficiency vacuum system for generator unit, including the condenser 1, Roots vacuum pump 2 and water ring vacuum pump 3 connected in series successively;The air inlet of the condenser 1 is connected with the exhaust port of generator unit condenser, exhaust port is connected with the air inlet of Roots vacuum pump 2;The air inlet of the Roots vacuum pump 2 is connected in parallel with the air inlet of generator unit original vacuum pump, and the air outlet is connected with the air inlet of water ring vacuum pump 3;Pressure gauge and temperature table are all installed on the air inlet and outlet pipeline of the condenser 1, Roots vacuum pump 2 and water ring vacuum pump 3;Electric control valve 7 is equipped on the air inlet pipeline of the Roots vacuum pump 2;The exhaust port of the water ring vacuum pump 3 is connected with steam-water separator 8;

[0017] First heat exchanger 4 is equipped in the condenser 1, second heat exchanger 5 is equipped in Roots vacuum pump 2, third heat exchanger 6 is equipped in water ring vacuum pump 3, and the first heat exchanger 4, second heat exchanger 5 and third heat exchanger 6 are connected in parallel cooling circulating water, respectively to condenser 1, Roots vacuum pump 2, water ring vacuum pump 3 cooling, reduce gas temperature, improve equipment operating efficiency;

[0018] The generator set's original shell-and-tube condenser draws saturated moist air through the unit's original vacuum pump, creating a negative vacuum pressure. Condenser 1 is connected in series between the unit's original condenser and the original vacuum pump, and Roots vacuum pump 2 and water ring vacuum pump 3 are connected in parallel with the original vacuum pump. Condenser 1 cools the saturated moist air drawn from the original condenser, condenses and recovers condensable gases, and reduces the suction load of the downstream vacuum pump. Because the gas phase change process is equivalent to a pressure change process, the condensation of condensable gases reduces the gas volume, naturally forming a vacuum inside the container. The addition of condenser 1 can condense and recover approximately 60-70% of the moist air, reducing the vacuum pump load by 60-70% while significantly increasing the ultimate vacuum level and, consequently, improving the generator set's power generation efficiency. By using Roots vacuum pump 2 and water ring vacuum pump 3 in parallel with the original vacuum pump, the suction capacity of the vacuum system can be greatly improved, effectively compensating for the problem of vacuum degree drop caused by long-term operation of the generator set, and forming a high pressure difference between the vacuum pump inlet pressure and the turbine exhaust pressure, thereby improving the turbine power generation efficiency and ensuring system safety.

[0019] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. A high-efficiency vacuum system for a generator set, characterized by: The invention comprises a condenser (1), a Roots vacuum pump (2) and a water ring vacuum pump (3) connected in series in sequence; the air inlet of the condenser (1) is connected to the exhaust port of the condenser of the generator set, and the exhaust port is connected to the air inlet of the Roots vacuum pump (2); the air inlet of the Roots vacuum pump (2) is connected in parallel to the air inlet of the original vacuum pump of the generator set, and the air outlet is connected to the air inlet of the water ring vacuum pump (3).

2. The high-efficiency vacuum system for a generator set according to claim 1, characterized in that: The condenser (1) is provided with a first heat exchanger (4), the Roots vacuum pump (2) is provided with a second heat exchanger (5), and the water ring vacuum pump (3) is provided with a third heat exchanger (6).

3. The high-efficiency vacuum system for a generator set according to claim 2, characterized in that: The first heat exchanger (4), the second heat exchanger (5) and the third heat exchanger (6) are connected in parallel to the cooling circulating water.

4. The high-efficiency vacuum system for a generator set according to claim 1, characterized in that: Pressure gauges and temperature gauges are installed on the inlet and outlet gas pipelines of the condenser (1), the Roots vacuum pump (2) and the water ring vacuum pump (3).

5. The high-efficiency vacuum system for a generator set according to claim 1, characterized in that: An electric control valve (7) is provided on the air inlet pipeline of the Roots vacuum pump (2).

6. The high-efficiency vacuum system for a generator set according to claim 1, characterized in that: The exhaust port of the water ring vacuum pump (3) is connected to a steam-water separator (8).

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