Flow control device for circulating cooling water pipeline of gas power station

Abstract

The utility model relates to a flow control device for a circulating cooling water pipeline of a gas power station, which is characterized in that a cooling water inlet pipe a, a cooling water outlet pipe b, a hot gas inlet pipe c and a hot gas outlet pipe d are arranged on a heat exchanger; a first electromagnetic flow valve, a second electromagnetic flow valve, a third electromagnetic flow valve and a fourth electromagnetic flow valve are installed on the cooling water inlet pipe a, the cooling water outlet pipe b, the hot air inlet pipe c and the hot air outlet pipe d correspondingly, and a PLC control device is fixedly arranged on one side of the heat exchanger. When the air inlet temperature in the hot air inlet pipe c reaches a preset value, the air inlet amount of the hot air inlet pipe c and the air displacement of the hot air outlet pipe d can be reduced through the PLC control device, meanwhile, the water inlet amount of the cooling water inlet pipe a and the water outlet amount of the cooling water outlet pipe b are increased, the heat energy utilization rate is increased, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the field of gas power plants, in particular to a circulating cooling water pipeline flow control device for gas power plants. Background Art

[0002] The air compressor is one of the main auxiliary machines of a gas-fired power station. It plays an important role in the operation of the power station and provides instrument air and maintenance air for the entire power station. The air compressor generates heat during operation and needs to be cooled to ensure that it can produce compressed air normally. However, the existing air compressor circulating cooling water pipe cannot adjust the flow of the cooling water pipe according to the temperature of the gas discharged by the air compressor, which consumes a lot of energy and needs to be improved urgently. Utility Model Content

[0003] The utility model aims to provide a gas power plant circulating cooling water pipeline flow control device, which is used to solve the problem that the existing air compressor circulating cooling water pipe cannot adjust the flow in the pipeline according to the real-time temperature of the air compressor and consumes a lot of energy.

[0004] In order to solve the above problems, the utility model provides a flow control device for a circulating cooling water pipeline of a gas power plant, wherein the heat exchanger is provided with a cooling water inlet pipe a, a cooling water outlet pipe b, a hot gas inlet pipe c and a hot gas outlet pipe d, a gas temperature sensor is installed on the hot gas inlet pipe, and a first electromagnetic flow valve, a second electromagnetic flow valve, a third electromagnetic flow valve and a fourth electromagnetic flow valve are respectively installed on the cooling water inlet pipe a, the cooling water outlet pipe b, the hot gas inlet pipe c and the hot gas outlet pipe d, and a PLC control device electrically connected to the gas temperature sensor, the first electromagnetic flow valve, the second electromagnetic flow valve, the third electromagnetic flow valve and the fourth electromagnetic flow valve is fixedly provided on one side of the heat exchanger.

[0005] The utility model provides a gas power plant circulating cooling water pipeline flow control device which also has the following technical features:

[0006] Furthermore, the preset temperature of the gas temperature sensor is 200°.

[0007] Furthermore, the pipe types of the cooling water inlet pipe a and the cooling water outlet pipe b are DN15, and the pipe diameter types of the hot air inlet pipe c and the hot air outlet pipe d are DN25.

[0008] Furthermore, the flow velocity range of the liquid in the cooling water inlet pipe a and the cooling water outlet pipe b is 0.5 m / s.

[0009] Furthermore, the flow rate range of the liquid in the hot gas inlet pipe c and the hot gas outlet pipe d is 0.4 m / s.

[0010] Furthermore, the opening time difference between the second electromagnetic flow valve and the first electromagnetic flow valve is 3s, and the opening time difference between the fourth electromagnetic flow valve and the third electromagnetic flow valve is 5s.

[0011] The utility model has the following beneficial effects: the gas temperature in the hot gas inlet pipe c can be detected in real time by the gas temperature sensor, and the temperature signal can be transmitted to the PLC control device in real time; when the air intake temperature in the hot gas inlet pipe c reaches a preset value, the PLC control device can reduce the air intake volume of the hot gas inlet pipe c and the exhaust volume of the hot gas outlet pipe d, while increasing the water intake volume of the cooling water inlet pipe a and the water outlet volume of the cooling water outlet pipe b, thereby improving the utilization rate of thermal energy and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the gas power plant circulating cooling water pipeline flow control device. DETAILED DESCRIPTION

[0013] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0014] like Figure 1 In the embodiment of a circulating cooling water pipeline flow control device of a gas power station of the utility model shown in the figure, a cooling water inlet pipe a, a cooling water outlet pipe b, a hot gas inlet pipe c and a hot gas outlet pipe d are provided on a heat exchanger 1, a gas temperature sensor 2 is installed on the hot gas inlet pipe, a first electromagnetic flow valve 31, a second electromagnetic flow valve 32, a third electromagnetic flow valve 33 and a fourth electromagnetic flow valve 34 are installed on the cooling water inlet pipe a, the cooling water outlet pipe b, the hot gas inlet pipe c and the hot gas outlet pipe d respectively, a PLC control device 4 electrically connected to the gas temperature sensor 2, the first electromagnetic flow valve 32, the second electromagnetic flow valve 32, the third electromagnetic flow valve 33 and the fourth electromagnetic flow valve 34 is fixedly provided on one side of the heat exchanger 1, specifically, the gas temperature in the hot gas inlet pipe c can be detected in real time through the gas temperature sensor 2, and the temperature signal can be transmitted to the PLC control device 4 in real time, when the intake air temperature in the hot gas inlet pipe c reaches a preset value, the PLC control device 4 can reduce the intake air temperature of the hot gas inlet pipe c. The air intake volume and the exhaust volume of the hot air outlet pipe d are increased, and at the same time, the water intake volume of the cooling water inlet pipe a and the water output volume of the cooling water outlet pipe b are increased to improve the utilization rate of thermal energy and reduce energy consumption.

[0015] In one embodiment of the present application, the preset temperature of the gas temperature sensor 2 is 200°.

[0016] In one embodiment of the present application, the pipe type of the cooling water inlet pipe a and the cooling water outlet pipe b is DN15, and the pipe diameter type of the hot air inlet pipe c and the hot air outlet pipe d is DN25.

[0017] In one embodiment of the present application, the flow rate range of the liquid in the cooling water inlet pipe a and the cooling water outlet pipe b is 0.5 m / s.

[0018] In one embodiment of the present application, the flow rate range of the liquid in the hot gas inlet pipe c and the hot gas outlet pipe d is 0.4 m / s. Specifically, since the flow rate of the liquid in the cooling water inlet pipe a and the cooling water outlet pipe b is 0.4 m / s less than the flow rate of the liquid in the hot gas inlet pipe c and the hot gas outlet pipe d, which is 0.5 m / s, the heat exchange efficiency of cooling water to hot gas can be improved.

[0019] In one embodiment of the present application, the opening time difference between the second electromagnetic flow valve 32 and the first electromagnetic flow valve 31 is 3s, and the opening time difference between the fourth electromagnetic flow valve 34 and the third electromagnetic flow valve 33 is 5s. Specifically, such a design can quickly discharge the hot water after heat exchange from the heat exchanger 1, slow down the discharge of hot gas, which is conducive to sufficient heat exchange between cooling water and hot gas, and further improves the heat exchange efficiency.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A gas power plant circulating cooling water pipeline flow control device, comprising a heat exchanger, characterized in that: The heat exchanger is provided with a cooling water inlet pipe a, a cooling water outlet pipe b, a hot air inlet pipe c and a hot air outlet pipe d. A gas temperature sensor is installed on the hot air inlet pipe. The cooling water inlet pipe a, the cooling water outlet pipe b, the hot air inlet pipe c and the hot air outlet pipe d are respectively installed with a first electromagnetic flow valve, a second electromagnetic flow valve, a third electromagnetic flow valve and a fourth electromagnetic flow valve. A PLC control device electrically connected to the gas temperature sensor, the first electromagnetic flow valve, the second electromagnetic flow valve, the third electromagnetic flow valve and the fourth electromagnetic flow valve is fixedly provided on one side of the heat exchanger.

2. A gas power plant circulating cooling water pipeline flow control device according to claim 1, characterized in that: The preset temperature of the gas temperature sensor is 200°.

3. A gas power plant circulating cooling water pipeline flow control device according to claim 2, characterized in that: The pipe types of the cooling water inlet pipe a and the cooling water outlet pipe b are DN15, and the pipe diameter types of the hot air inlet pipe c and the hot air outlet pipe d are DN25.

4. A gas power plant circulating cooling water pipeline flow control device according to claim 1, characterized in that: The flow rate range of the liquid in the cooling water inlet pipe a and the cooling water outlet pipe b is 0.5 m / s.

5. A gas power plant circulating cooling water pipeline flow control device according to claim 4, characterized in that: The flow rate range of the liquid in the hot gas inlet pipe c and the hot gas outlet pipe d is 0.4 m / s.

6. A gas power plant circulating cooling water pipeline flow control device according to claim 5, characterized in that: The opening time difference between the second electromagnetic flow valve and the first electromagnetic flow valve is 3s, and the opening time difference between the fourth electromagnetic flow valve and the third electromagnetic flow valve is 5s.

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