JPH0687639U - Air compressor air suction device - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents gas turbine power down even in high temperatures. [Structure] An air introducing section 8 is provided on the inlet side of the air compressor 2, a first flow path 10a and a second flow path 10b are defined in the air introducing section 8, and a damper 11 is provided in the second flow path 10a. The cooler 7 is provided in the two flow paths 10b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air suction device of an air compressor, and in particular, a gas turbine output that is affected by a change in the temperature of the intake air is sucked in by providing a cooler so that the output does not receive a change in the air temperature. The present invention relates to an air intake device for an air compressor that can always maintain an air temperature at a standard value.

[0002]

[Prior art]

 A gas turbine plant conventionally used for power generation, as shown in FIG. 6, sucks in the air with an air compressor 2, compresses the sucked air into a high pressure, and sends it out to a combustor 3. Here, fuel is added to generate combustion gas, the generated combustion gas is sent to the gas turbine 4 to perform expansion work, and the rotational torque obtained from the expansion work is applied to the generator 6 to obtain air output. The exhaust gas after expansion work is released to the atmosphere 5.

However, in the gas turbine plant, when the atmospheric temperature changes, the rotational torque of the gas turbine 4 also changes, and this change also has a large effect on the electric output change of the generator 6. .

Usually, in determining the rotational torque (output) of the gas turbine 4, the design requirements are determined based on the intake amount of the atmosphere and the temperature of the atmosphere of 15 ° C. There is a difference of 15 ° C or more from the winter season, so the specific weight in terms of temperature also has a large difference. The difference in specific weight is repelled by the magnitude of the suction weight flow rate, and therefore the reduction in the output of the gas turbine operation in summer is fatal.

In order to counter such a problem, recently, as shown in FIG. 6, a cooler 7 is arranged on the inlet side of the air compressor 2 to cool the atmosphere passing through the air introducing portion 8 and to suck the intake air even in summer. Is conducting research to enable efficient operation of gas turbine plants under design temperature conditions.

[0006]

[Problems to be solved by the device]

 When the cooler 7 is installed on the inlet side of the air compressor 2, theoretically, the gas turbine plant can be operated with high efficiency even in the summer, but on the other hand, the problem due to the cooler 7 is practically encountered. ing. For example, if a cooler 7 is arranged on the inlet side of the air compressor 2, resistance to the flow of the atmosphere is exerted, and when reaching the air compressor 2, the loss due to the turbulence of the flow doubles as compared to the conventional case, and cooling is performed. It has been confirmed that the rotating torque (output) applied to the generator from the gas turbine is about 3% less than that without the unit 7.

Therefore, when a cooler is arranged on the inlet side of the air compressor to operate the gas turbine plant under high efficiency in summer, it is necessary to consider reduction of pressure loss. In view of the above point, the present invention aims to disclose an air intake device for an air compressor that appropriately arranges a cooler in an air introduction section according to operating conditions and requires high efficiency operation.

[0008]

[Means for Solving the Problems]

 In order to achieve this object, the device according to claim 1 is provided with an air introduction part at the inlet side of the air compressor, and the air introduction part is provided with a first flow path and a second flow path along the air flow. It is characterized in that a partition wall that defines the passage is provided, a damper is provided in the first passage, and a cooler is provided in the second passage.

In this configuration, it is desirable that the damper of the first flow path be closed when any one of the cooler operation signal and the air compressor operation signal is detected. The invention described in claim 3 is characterized in that an air introducing portion is provided on the inlet side of the air compressor, and a cooler that moves forward and backward from the air introducing portion is provided.

In this configuration, the cooler that advances and retracts the air introduction part moves to the flow path position of the air introduction part when either one of the cooler operation signal and the air compressor operation signal is detected. Let

[0011]

[Action]

 The invention according to claim 1, wherein during operation of the gas turbine plant, the damper is closed by one of the cooler operation signal and the air compressor operation signal, so that the atmosphere is passing through the second flow path and the cooler When the cooler cannot be operated for some reason, the damper opens and the atmosphere flows into the first flow path. Therefore, the first and second flow paths can be selectively used according to the operating conditions, which leads to a reduction in pressure loss.

In the device according to the third aspect of the present invention, since the cooler advances and retreats from the air introduction part by either one of the cooler operation signal and the air compressor operation signal, the operation of the gas turbine plant is The cooler can be used when needed. Therefore, it is convenient because it leads to a reduction in pressure loss rather than always providing a cooler in the air introduction section.

[0013]

【Example】

 The suction device of the air compressor according to the present invention will be described separately for each embodiment. FIG. 1 is a schematic view of a first embodiment according to the present invention. The gas turbine plant, which is entirely represented by GT, has an air compressor 2, a gas turbine 4, and a generator 6 arranged in a skewer shape, and is rotated by the combustion gas supplied from the combustor 3 to the gas turbine 4. The torque is obtained and this rotational torque is transmitted to the generator 6 to obtain the electric output.

On the other hand, the inlet side of the air compressor 2 is connected to the air introducing section 8 via the pipe line 1. The air introduction part 8 is provided with a filter 9 at the inlet and is provided with a partition wall 10c that defines a first flow path 10a and a second flow path 10b along the flow of the atmosphere (air). A damper 11 is provided at 10a, and a cooler 7 is provided at the second flow path 10b.

As shown in FIG. 2, the sequence for opening and closing the damper 11 includes a cooler operation command signal, an air compressor operation signal, a cooler coolable state signal, and a cooler operation stoppage in the central operation room. The command signal is displayed, and when either one of these signals, the air compressor operation signal or the cooler coolable state signal, is caught, the damper 11 is closed and the cooler operation is stopped. When the command signal is caught, the damper 11 opens.

Therefore, during operation of the cooler 7, the atmosphere passes through the cooler 7 of the second flow path 10b, is preferably cooled here, and is sent to the air compressor 2. Therefore, even when the temperature in summer is high, the gas temperature is reduced. -The bin plant GT can operate with high efficiency without power down due to pressure loss. In addition, in the case where an accident or some other situation occurs in the cooler 7, when the operation stop command signal is input, the damper 11 is opened, the atmosphere is given to the air compressor 2 from the first flow path 10a, and the operation is continued. It

FIG. 3 is a schematic view of a second embodiment according to the present invention. In this embodiment, the cooler 12 of the air inlet 8 is moved back and forth across the flow path 14, and the forward / backward movement of the cooler 12 is performed as shown in the sequence of FIG. A signal, an air compressor operation signal, or a cooler coolable state signal advances from the storage section 13 to the flow path 8, and a cooler operation stop command signal returns from the flow path 14 to the storage section 13. It is like this.

Therefore, the atmosphere can be cooled by the cooler 12 when necessary in the operation of the gas turbine plant GT, and the pressure loss is lower than that when the cooler 12 is always installed in the flow path 14. It leads to reduction.

[0019]

[Effect of device]

 As described above, in the intake device for an air compressor according to the present invention, the air introduction portion provided on the inlet side of the air compressor divides the flow passage, and a damper is provided in one flow passage and another By arranging a cooler in the flow path and moving the cooler in the air introduction part back and forth, it is possible to use the cooler properly according to the operating conditions, so the pressure loss of the atmosphere passing through the flow path is relatively small. It can be sent to the air compressor with a small amount. Therefore, the gas turbine plant can operate with high efficiency even when the summer temperature is high.

[Brief description of drawings]

FIG. 1 is a schematic view showing a first embodiment of the present invention.

FIG. 2 is a control block diagram of the first embodiment.

FIG. 3 is a schematic view showing a second embodiment of the present invention.

FIG. 4 is a control block diagram of a second embodiment.

FIG. 5 is a schematic view showing a conventional example.

[Explanation of symbols]

 2 Air compressor 3 Combustor 4 Gas turbine 6 Generator 7, 12 Cooler 8 Air introduction part 10a 1st flow path 10b 2nd flow path 10c Partition wall 11 Damper GT Gas turbine turbine plant

Claims (4)

[Scope of utility model registration request] 1. An air introduction part is provided on the inlet side of an air compressor, and this air introduction part is provided with partition walls that demarcate a first flow path and a second flow path along the flow of air. Dampers on the road
An air suction device for an air compressor, wherein a cooler is provided in the second flow path. 2. The damper of the first flow path comprises a cooler operation signal,
The air intake device for an air compressor according to claim 1, wherein the air intake device is closed when any one of the air compressor operation signals is detected. 3. An air suction device for an air compressor, comprising: an air introduction section provided on the inlet side of the air compressor; and a cooler movable forward and backward from the air introduction section. 4. The cooler for advancing and retracting the air introducing section is configured to move to a flow path position of the air introducing section when detecting one of a cooler operating signal and an air compressor operating signal. The air suction device for an air compressor according to claim 1.