An off-line cleaning system for a compressor

Abstract

The application relates to a compressor offline cleaning system which comprises a state confirmation module, a cleaning module, a liquid adding module, a liquid storage module and a controller; based on existing software programming and certain hardware modification, the compressor offline cleaning independent disc surface operation task is integrated as sequence control, the execution time of the sequence control program is matched with the dosing amount of the on-site cleaning liquid in time, and thus the optimal compressor offline cleaning process is realized. Compared with the prior art, the application has the advantages of high automation degree, simple operation and low labor cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor equipment, in particular to a compressor off-line cleaning system. BACKGROUND

[0002] As one of the important components of gas turbine, the main function of the compressor is to provide clean air after pressurization for the gas turbine. Due to long-term operation or high air pollution in the environment, although the air sucked by the compressor is filtered by the filter system, dust and small particles in the air can easily accumulate on the moving blades of the compressor and form salt deposits. Excessive scale or salt corrosion can change the moving blade flow passage of the compressor, reduce the compression ratio and working efficiency of the compressor, and even damage the dynamic balance of the compressor blades. In order to deal with this situation, the compressor should be cleaned regularly. The cleaning methods include two kinds, off-line cleaning should be used under high pollution, and online cleaning should be used under general pollution.

[0003] The off-line cleaning process of the whole compressor requires at least the cooperation of one disc operator and one on-site operator, and the off-line cleaning method has the following disadvantages:

[0004] 1) The disc operator needs to manually confirm each condition before the compressor off-line cleaning, manually execute the cleaning program and confirm each intermediate state, and manually re-commission the related systems after the cleaning is completed.

[0005] 2) The on-site operator needs to manually start and stop, supplement the cleaning desalted water, and manually switch the flushing nozzle according to the instructions of the disc operator. In addition, these on-site operation sites are far apart, and the on-site operator needs to go back and forth.

[0006] 3) The disc operator needs to reserve the operation time of the on-site operator to avoid the completion of the off-line cleaning program and the incomplete addition of the compressor cleaning liquid.

[0007] 4) When the liquid level of the compressor washing tank is too low, the on-site operator needs to reserve a certain amount of time to supplement the water to a certain liquid level in time to avoid the phenomenon of emptying the pump when the compressor is washed.

[0008] In summary, the existing compressor off-line cleaning program has the defects of low automation degree, high labor cost and complicated operation. SUMMARY

[0009] The purpose of the present application is to overcome the defects of the prior art and provide a compressor off-line cleaning system. The independent disc operation task of the compressor off-line cleaning is integrated into a sequential control task, the execution time of the sequential control program is matched with the dosing amount of the on-site cleaning liquid in terms of time, and the optimal off-line cleaning process is realized.

[0010] The object of the present application can be achieved by the following technical solutions.

[0011] The compressor off-line cleaning system comprises a state confirmation module, a cleaning module, a liquid adding module, a liquid storage module and a controller.

[0012] The cleaning module comprises a water washing tank, and the water washing tank is connected with a cleaning component through a main connecting pipe.

[0013] The cleaning module, the liquid adding module and the liquid storage module are sequentially connected.

[0014] The liquid adding module is connected with the controller.

[0015] The state confirmation module is connected with the compressor and the controller respectively.

[0016] Further, the water washing tank is provided with a first sensor and a second sensor.

[0017] The controller is connected with the first sensor and the second sensor respectively.

[0018] The first sensor is arranged on the upper part of the water washing tank, and is used for detecting the high liquid level of the water washing tank.

[0019] The second sensor is arranged on the lower part of the water washing tank, and is used for detecting the low liquid level of the water washing tank.

[0020] The controller is further connected with a high liquid level switch and a low liquid level switch respectively.

[0021] Further, the cleaning component comprises a cleaning nozzle, and the cleaning nozzle comprises a jet nozzle and an atomizing nozzle.

[0022] Further, the cleaning component comprises a nozzle switching electromagnetic valve, and the nozzle switching electromagnetic valve is connected with the controller.

[0023] The nozzle switching electromagnetic valve comprises an inlet and a plurality of outlets.

[0024] The inlet is connected with the main connecting pipe, and the other end of the main connecting pipe is connected with the water washing tank.

[0025] The plurality of outlets are connected with secondary connecting pipes, and each secondary connecting pipe is connected with a different cleaning nozzle.

[0026] Further, the cleaning module comprises a jet pump, the jet pump inlet is connected with the water washing tank, and the jet pump outlet is connected with the main connecting pipe.

[0027] Further, the liquid storage module comprises a medicine storage tank and a desalted water storage tank.

[0028] The medicine storage tank is connected with the water washing tank through a first connecting pipe.

[0029] The storage salt water tank is connected with the water washing tank through a second connecting pipe.

[0030] Further, the liquid adding module comprises a medicine adding electromagnetic valve, the medicine adding electromagnetic valve is installed on the first connecting pipe, and the medicine adding electromagnetic valve is connected with the controller.

[0031] Further, the liquid adding module comprises a water supplementing electromagnetic valve, the water supplementing electromagnetic valve is installed on the second connecting pipe, and the water supplementing electromagnetic valve is connected with the controller.

[0032] Further, the state confirming module comprises a processor and a plurality of detection devices, and the detection devices are used for detecting state parameters of the air compressor.

[0033] Further, the system further comprises a timer and an alarm module, and the alarm module and the timer are connected with the controller respectively.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] 1. The present application controls the whole cleaning process of the air compressor through the state confirming module and the controller, realizes the program automation of the offline cleaning of the air compressor through the sequential control, optimizes the whole operation process, is simple and convenient to operate in the cleaning process, has high automation degree, and realizes the optimal offline cleaning effect of the air compressor.

[0036] 2. The present application controls the whole process of the offline cleaning of the air compressor through the controller, reduces the daily workload of the disc personnel and the on-site operator, avoids the personnel misoperation, and reduces the labor cost.

[0037] 3. The present application is based on the existing software programming and certain hardware modification, and has controllable design cost and cost, and high practicability. DETAILED DESCRIPTION

[0038] Figure 1 The figure is a logic diagram of the present application. CONCRETE EMBODIMENT

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0040] As Figure 1As shown, the compressor off-line cleaning system provided by the embodiment comprises a state confirmation module, a cleaning module, a liquid adding module, a liquid storage module and a controller; the cleaning module comprises a water washing tank, and the water washing tank is connected with a cleaning component through a main connecting pipe; the cleaning module, the liquid adding module and the liquid storage module are connected in sequence; the liquid adding module is connected with the controller; and the state confirmation module is connected with the compressor and the controller respectively.

[0041] The state confirmation module is connected with the compressor and the controller respectively, and is provided with a processor and a plurality of detection devices; the detection devices comprise devices for temperature detection, devices for detection of baffle switches, devices for detection of working time of the compressor, and other various commonly used devices for detection of state parameters of the compressor; in specific implementation, signals of a plurality of sensors and switch elements can be connected to a DCS system, and the DCS system is used as the processor to confirm the state of the compressor and determine whether the compressor meets the cleaning requirements. Alternatively, a single-chip microcomputer, a microprocessor or the like is used to verify whether actual state parameters of the compressor meet the cleaning conditions of the compressor through a comparison circuit, a logic judgment circuit or other digital circuits.

[0042] Meanwhile, the system further comprises an alarm module, and during program design, unexpected interruption, program alarm, monitoring of large shaft rotating speed and other conditions are considered, the working condition is monitored by the state confirmation module, if an abnormality occurs in the working, the program error is triggered, and the alarm module is used for alarm, and the corresponding program is interrupted; in specific implementation, an audible and visual alarm or the like is used for alarm.

[0043] The cleaning module, the liquid adding module and the liquid storage module are connected in sequence;

[0044] The cleaning module comprises the water washing tank, and the water washing tank is provided with a first sensor and a second sensor; the controller is connected with the first sensor and the second sensor respectively; the first sensor is arranged on a side surface of an upper portion of the water washing tank and is used for detection of high liquid level of the water washing tank; the second sensor is arranged on a side surface of a lower portion of the water washing tank and is used for detection of low liquid level of the water washing tank; and the controller is further connected with a high liquid level switch and a low liquid level switch respectively. The high liquid level switch is arranged to prevent overflow of the water washing tank, and the low liquid level switch is arranged to prevent emptying of the pump.

[0045] Specifically, if the second sensor detects liquid contact, i.e., the liquid in the water washing tank reaches a preset low liquid level, the second sensor sends a detection signal to the controller, the controller controls the low liquid level switch to output a low level signal, and the liquid delivery function of the water washing tank is turned on; if the second sensor cannot detect liquid contact, i.e., the liquid in the water washing tank is lower than the low liquid level, the second sensor sends a detection signal to the controller, the controller controls the low liquid level switch to output a high level signal, and the liquid delivery function of the water washing tank is turned off, and the water inlet function of the water washing tank is turned on, i.e., the water replenishment electromagnetic valve is opened to replenish the desalted water. If the first sensor detects liquid contact, i.e., the liquid reaches a high liquid level, the first sensor sends its detection signal to the controller, the controller controls the high liquid level switch to output a high level signal, and the water inlet function of the water washing tank is turned off;

[0046] The water washing tank is connected with a cleaning component through a main connecting pipe; the cleaning component comprises a nozzle switching electromagnetic valve connected with the controller; the nozzle switching electromagnetic valve comprises a liquid inlet and a plurality of liquid outlets; the liquid inlet is connected with the main connecting pipe, and the other end of the main connecting pipe is connected with the water washing tank; the plurality of liquid outlets are provided with secondary connecting pipes, and each secondary connecting pipe is connected with a different cleaning nozzle.

[0047] In this embodiment, the cleaning nozzles comprise jet nozzles and atomizing nozzles;

[0048] In this embodiment, two liquid outlets are provided on the nozzle switching electromagnetic valve, which are a first liquid outlet and a second liquid outlet; in other embodiments, different numbers of liquid outlets can be provided according to different requirements;

[0049] The jet nozzles are connected with the first liquid outlet through connecting pipes, and the atomizing nozzles are connected with the second liquid outlet through connecting pipes; the valve corresponding to the first liquid outlet is referred to as a jet nozzle water inlet valve, and the valve corresponding to the second liquid outlet is referred to as an atomizing nozzle electromagnetic valve.

[0050] In specific operation, the jet nozzles and the atomizing nozzles are respectively inserted into the cleaning liquid inlets of the air compressor, and the movement of the valve body in the nozzle electromagnetic valve is controlled by the controller to open or close different cleaning nozzles.

[0051] A jet pump is provided on the water washing tank, and in this embodiment, the jet pump is connected with a relay and then connected with the controller, and the on-off of the dosing electromagnetic valve is realized by connecting or disconnecting the relay through the controller, so as to control the delivery of the liquid in the water washing tank. A discharge valve and an air vent valve are also provided on the water washing tank, the discharge valve is connected to a trench through a hose for discharging excess liquid in the water washing tank, and the air vent valve is used to discharge excess gas.

[0052] The liquid storage module comprises a medicine storage tank and a desalted water storage tank; the medicine storage tank is connected with the water washing tank through a first connecting pipe; and the desalted water storage tank is connected with the water washing tank through a second connecting pipe. The medicine storage tank is used to store washing liquid, and the desalted water storage tank is used to store desalted water.

[0053] The liquid adding module comprises a medicine adding electromagnetic valve, which is installed on the first connecting pipe and connected with the controller. The controller controls the delivery of the washing liquid in the medicine storage box through the medicine adding electromagnetic valve. When the medicine adding electromagnetic valve is connected, the washing liquid is delivered into the water washing box.

[0054] The liquid adding module further comprises a water supplementing electromagnetic valve, which is installed on the second connecting pipe and connected with the controller. The controller controls the opening and closing of the water supplementing electromagnetic valve to control the delivery of the liquid in the salt-removing water storage box. When the water supplementing electromagnetic valve is connected, the salt-removing water is delivered into the water washing box.

[0055] In this embodiment, the system comprises a timer, which is connected with the controller. The timer calculates the time required for the specific implementation.

[0056] In this embodiment, the controller is used to control the compressor off-line cleaning system based on the Siemens T3000 system. The Siemens T3000 system is the operation software of the distributed control system of the unit machine group. The software system has a certain program design openness. The independent disc surface operation task of the compressor off-line cleaning can be integrated into the sequence control through programming. The execution time of the sequence control program and the dosing amount of the on-site cleaning liquid are time-effectively matched, so that the optimal off-line cleaning process is realized.

[0057] In this embodiment, the compressor off-line cleaning sequence system based on the Siemens T3000 system provided by the present application comprises the following steps:

[0058] I. The state confirmation module confirms the preparation work before the compressor cleaning

[0059] The application program deployed in the state confirmation module is combined with the compressor data measured by a plurality of sensors and detection devices to confirm the state of the compressor and determine whether the compressor meets the cleaning requirements, comprising the following steps:

[0060] (1) confirming that the gas turbine running time is greater than 6 hours, the gas turbine disc engagement signal output is 1, and the ambient temperature is greater than 5℃;

[0061] (2) confirming that the frequency conversion device is started, the excitation device is in standby state and has no locking or fault signal;

[0062] (3) checking that the cleaning module, the liquid adding module and the controller are normal, especially that the nozzle switching electromagnetic valve and the water supplementing electromagnetic valve have no fault, the water washing box has no high liquid level or low liquid level alarm; confirming that the hose connection between the opening of the liquid adding module and the water washing box is firm, and the opening of the water washing box and the main connecting pipe are firmly connected.

[0063] (4) Confirm that each discharge valve of the gas turbine body is opened, and that the discharge valve from the water washing tank to the trench and the air exhaust valve are opened;

[0064] (5) Turn on the IGV power supply sub-ring, open the IGV opening to 100%, and confirm that the IGV opening is to 100%;

[0065] (6) Confirm that the compressor inlet damper is opened, the inlet dryer is disabled, and the inlet dryer is confirmed to be disabled;

[0066] (7) Confirm that the waste heat boiler "release" condition is met, open the chimney damper, and confirm that the chimney damper is opened.

[0067] (8) Turn off the "SGC GAS TURBINE", "UNIT COORDINATION" and "SFC HRSG PURGE" from ON to OFF state.

[0068] (9) Confirm that the "ON" signal of "EXCITATION" is "1", the "SFC 1RDY" and "SFC 3RDY" signals are "1", and there is no blocking or fault signal of SFC.

[0069] II. Soaking work

[0070] The control program is deployed in the controller by professional technicians according to different needs. In this embodiment, a preferred control mode is used as an example to realize the soaking work of the compressor, including the following steps:

[0071] (1) The controller controls the mixed cleaning liquid to mix the washing liquid and the desalted water at a ratio of 1:4, that is, to add the washing liquid and the desalted water from the medicine storage tank and the desalted water storage tank to the water washing tank at a ratio of 1:4 by opening the medicine electromagnetic valve and the water electromagnetic valve, respectively, until the mixed cleaning liquid reaches the high liquid level of the water washing tank, the preparation of the cleaning liquid is completed, and then the medicine electromagnetic valve and the water electromagnetic valve are closed;

[0072] (2) Confirm that the water inlet valve of the atomizing nozzle (SPRAY NOZZEL) is in the closed state, open the water inlet valve of the compressor jet nozzle (JET NOZZEL), and confirm that the water inlet valve of the compressor jet nozzle (JET NOZZEL) is opened;

[0073] (3) Start the jet pump, at which time the local personnel need to check that the cleaning water tank water level is normally lowered and each cleaning liquid conveying pipeline interface is leak-free;

[0074] (4) The injection pump is deactivated by a timer delay of X minutes or a low liquid level switch signal "1", the water inlet valve of the JET NOZZEL is closed, and the water inlet valve of the JET NOZZEL is confirmed to be closed. In the specific implementation, the time X of the delay is determined by a person skilled in the art according to different needs;

[0075] (5) The water inlet valve of the SPRAY NOZZEL is opened, and the water inlet valve of the SPRAY NOZZEL is confirmed to be opened;

[0076] (6) The gas turbine is stopped by the cranking, and the cranking engagement signal is confirmed to be "0";

[0077] (7) The SFC is set from the UNIT START to the COMPR WASH mode, and the SFC PREPARE is put into operation.

[0078] The injection pump is started;

[0079] (8) After the prepare signal is confirmed to be "1", the mode 【2】 is executed, that is, the starting of the gas turbine is confirmed by the operator on the panel, the speed is increased to 700-800 rpm, and then the SFC is exited;

[0080] (9) The injection pump is deactivated by a timer delay of X minutes or a low liquid level switch signal "1".

[0081] (10) The water inlet valve of the SPRAY NOZZEL is closed, and the water replenishment electromagnetic valve is opened to supplement the desalted water into the water washing tank;

[0082] (11) The water inlet valve of the SPRAY NOZZEL is confirmed to be closed;

[0083] (12) When the speed of the gas turbine cranking is less than 2.5 Hz, the gas turbine cranking program is started.

[0084] III. Rinsing work

[0085] A control program is deployed in the controller by a person skilled in the art according to different needs, and the embodiment takes a preferred control mode as an illustration to realize the rinsing work of the compressor, including the following steps:

[0086] (1) The water replenishment electromagnetic valve is closed for a delay of X minutes, or the water replenishment electromagnetic valve is closed when the high liquid level switch signal of the water washing tank is output "1";

[0087] (2) The water inlet valve of the JET NOZZEL is confirmed to be closed, and the water inlet valve of the SPRAY NOZZEL is opened;

[0088] (3) Confirm the water inlet valve of the atomizing nozzle (SPRAY NOZZEL) is opened;

[0089] (4) Check the turbine cranking engagement signal, if the signal is "0", confirm that the turbine cranking is disabled, if the signal is "1", disable the turbine cranking;

[0090] (5) Check the SFC in the COMPR WASH mode, and use the SFC PREPARE;

[0091] (6) After confirming that the prepare signal is "1", execute mode 【2】, that is, the operator checks the SFC automatic use, and after the speed rises to 700-800 rpm / min, the SFC exits;

[0092] (7) When the turbine cranking speed is less than 2 Hz, start the turbine cranking program;

[0093] (8) Delay for X minutes or the low liquid level switch signal "1" to disable the injection pump, and close the water inlet valve of the atomizing nozzle (SPRAY NOZZEL).

[0094] (9) Confirm that the water inlet valve of the atomizing nozzle (SPRAY NOZZEL) and the water inlet valve of the jet nozzle (JET NOZZEL) are in the closed position.

[0095] (10) The on-site operator closes all the drain valves when there is no water flow out of the water collecting tank.

[0096] Four, reemployment

[0097] (1) Switch the SFC operation mode from COMPR WASH to UNIT START;

[0098] (2) "SGC GAS TURBINE", "UNIT COORDINATION" and "SFC HRSG PURGE" are switched from OFF state to ON state;

[0099] (3) Close the IGV to 11%, and exit the IGV power sub-loop;

[0100] (4) Use the drying device.

[0101] It can be understood that the application program deployed in the processor in the embodiment is prior art, which can automatically process the measured compressor data, and the programming software carried in the controller is also prior art, which can realize the functions of controlling the on-off of the dosing electromagnetic valve and the water supplementing electromagnetic valve, and details are not described herein.

[0102] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An offline compressor cleaning system, characterized in that, It includes a status confirmation module, a cleaning module, a liquid addition module, a liquid storage module, and a controller; The cleaning module includes a water washing tank, and the water washing tank is connected to a cleaning component via a main connecting pipe; The cleaning module, the liquid addition module, and the liquid storage module are connected in sequence. The liquid dispensing module is connected to the controller; The status confirmation module is connected to the compressor and the controller respectively; The status confirmation module includes a processor and multiple detection devices, which are used to detect the status parameters of the compressor. The compressor status is confirmed based on its status parameters to determine whether the compressor meets the cleaning requirements. The determination process includes the following steps: (1) Confirm that the gas turbine turning gear running time is greater than 6 hours, the gas turbine turning gear engagement signal output is 1, and the ambient temperature is greater than 5℃; (2) Confirm that the frequency converter is started, the excitation device is in standby mode and there is no lockout or fault signal; (3) Check that the cleaning module, liquid addition module and controller are normal, the nozzle switching solenoid valve and water replenishment solenoid valve are fault-free, and the water washing tank has no high or low liquid level alarm; confirm that the hose connection between the opening of the dosing solenoid valve in the liquid addition module and the water washing tank is secure, and confirm that the opening of the spray pump on the water washing tank is securely connected to the main connecting pipe. (4) Confirm that all discharge valves of the gas turbine body are open, and confirm that the discharge valve from the water washing tank to the trench and the air exhaust valve are open; (5) Activate the IGV power sub-ring, open the IGV to 100%, and confirm that the IGV is at 100%; (6) Confirm that the compressor inlet damper is open, stop using the inlet dryer, and confirm that the inlet dryer is stopped. (7) Confirm that the waste heat boiler "release" condition is met, open the chimney damper, and confirm that the chimney damper is open; (8) Switch "SGC GAS TURBINE", "UNIT COORDINATION" and "SFC HRSG PURGE" from ON to OFF; (9) Confirm that the "ON" signal of "EXCITATION" is "1", the "SFC 1 RDY" and "SFC 3 RDY" signals are "1", and there is no lockout or fault signal in SFC.

2. The compressor offline cleaning system according to claim 1, characterized in that, The washing tank is equipped with a first sensor and a second sensor; The controller is connected to the first sensor and the second sensor respectively; The first sensor is located at the top of the washing tank and is used to detect the high liquid level in the washing tank. The second sensor is located at the bottom of the washing tank and is used to detect the low liquid level in the washing tank. The controller is also connected to a high liquid level switch and a low liquid level switch.

3. The compressor offline cleaning system according to claim 1, characterized in that, The cleaning component includes a cleaning nozzle, which includes a jet nozzle and an atomizing nozzle.

4. The compressor offline cleaning system according to claim 3, characterized in that, The cleaning component includes a nozzle switching solenoid valve, which is connected to a controller. The nozzle switching solenoid valve includes an inlet and multiple outlets. The liquid inlet is connected to the main connecting pipe, and the other end of the main connecting pipe is connected to the water washing tank. The multiple liquid outlets are connected to secondary connecting pipes, and each secondary connecting pipe is connected to a different cleaning nozzle.

5. The compressor offline cleaning system according to claim 1, characterized in that, The cleaning module includes a jet pump, the inlet of which is connected to the water washing tank, and the outlet of which is connected to the main connecting pipe.

6. The compressor offline cleaning system according to claim 1, characterized in that, The liquid storage module includes a medicine storage tank and a demineralized water storage tank; The medicine storage tank is connected to the washing tank via a first connecting pipe; The demineralized water storage tank is connected to the washing tank via a second connecting pipe.

7. The compressor offline cleaning system according to claim 6, characterized in that, The liquid addition module includes a dosing solenoid valve; the dosing solenoid valve is installed on the first connecting pipe and is connected to the controller.

8. The compressor offline cleaning system according to claim 6, characterized in that, The liquid addition module includes a water replenishment solenoid valve, which is installed on the second connecting pipe and is connected to the controller.

9. The compressor offline cleaning system according to claim 1, characterized in that, It also includes an alarm module, which is connected to the controller.

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