Steam pipeline purging targeting device

Abstract

The invention provides a steam pipeline purging targeting device which comprises a flow monitoring module arranged on a steam pipeline and used for acquiring steam flow data and sending the steam flow data to a control module; the control module is electrically connected with the flow monitoring module and controls the opening degree of the adjusting valve and the opening degree of the temporary flushing door. The regulating valve is arranged at the output end of the steam pipeline, the opening and closing degree of the regulating valve is controlled by an instruction of the control module, and the regulating valve is used for controlling the flow of steam flowing into the purged pipeline; the temporary flushing door is arranged at the output end of the purged pipeline, and the temporary flushing door is used for storing energy or releasing steam in the purged pipeline; the target plate device is arranged at the output end of the blown pipeline and used for receiving steam discharged by the blown pipeline, and the blowing effect is embodied. The control module automatically obtains steam flow data in the steam pipeline through the flow monitoring module, the opening degree of the adjusting valve and the opening degree of the temporary flushing door are controlled respectively, the purging process is completed, and unmanned on-site monitoring is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline purging and targeting, and particularly relates to a steam pipeline purging and targeting device. BACKGROUND

[0002] During the manufacturing, transportation, storage and installation of steam pipelines, various impurities (such as iron filings, welding slag, sandstone and rust attached to the inner wall) may remain in the pipelines. According to the Industrial Metal Pipeline Engineering Construction Quality Acceptance Specification (GB50184-2011) P39-43, the steam pipelines leading to steam turbines or having provisions in the design documents shall be checked after steam purging, and the purging quality shall meet the final provisions in the design documents. If the purging is not thorough, the impurities may be carried into the device by the steam, affecting the equipment operation of the related units and the long-period safety of the device, so the purging and targeting of the steam pipeline is particularly important.

[0003] At present, steam pipeline purging mainly includes stable pressure purging and pressure rising purging. The stable pressure purging mainly continuously purges by giving a constant purging steam amount at the steam point, and the purging effect is poor and the purging time is long (about 15 days in the conventional mode). In particular, the welding slag attached to the inner wall of the pipeline is difficult to purge and fall off. If the purging line speed is increased, the purging steam amount needs to be increased, resulting in an increase in the cost of steam purging. The pressure rising purging has a relatively better effect and lower cost, and the instantaneous line speed is higher. However, the current technology has a higher requirement for the frequent cooperation of the boiler or steam supply point with the steam supply operation, and the construction operation intensity of the site personnel is large. In particular, the time for opening and closing the valve for discharging at the site needs more than 10 minutes, directly affecting the line speed and the blasting effect in the pressure rising discharging process.

[0004] Steam pipeline purging includes the processes of warming the pipeline, increasing the pressure and purging. Based on the conventional pressure rising steam purging and targeting, the steam amount of the lifting and lowering device, the site pressure gauge and the manual gate valve are cooperated with the pipeline stamping and discharging operation. Therefore, the conventional pressure rising purging needs the cooperation of multiple site personnel, is relatively time-consuming and labor-consuming, and has a certain construction operation risk. SUMMARY

[0005] Therefore, it is necessary to provide a steam pipeline purging and targeting device in view of the technical problems that the conventional pressure rising purging needs the cooperation of multiple site personnel, is relatively time-consuming and labor-consuming, and has a certain construction operation risk.

[0006] A steam pipeline purging and targeting device includes a flow monitoring module, a control module, an adjusting valve, a temporary flushing door and a target plate device.

[0007] The flow monitoring module is arranged on the steam pipeline and is used to acquire steam flow data in the steam pipeline and send the steam flow data to the control module.

[0008] The control module is electrically connected with the flow monitoring module, and is configured to control the opening degree of the adjusting valve and the temporary rush valve according to the steam flow data, respectively.

[0009] The adjusting valve is arranged at the output end of the steam pipeline, and the input end of the adjusting valve is configured to be connected with the steam pipeline. The output end of the adjusting valve is configured to be connected with the purging pipeline. The opening and closing degree of the adjusting valve is controlled by the instruction of the control module. The adjusting valve is configured to control the steam flow flowing into the purging pipeline.

[0010] The temporary rush valve is arranged at a position close to the output end of the purging pipeline. The input end of the temporary rush valve is directed to the output end of the adjusting valve. The output end of the temporary rush valve is directed to the target plate device. The opening and closing of the temporary rush valve is remotely controlled by the instruction of the control module. The temporary rush valve is configured to store or release the steam in the purging pipeline.

[0011] The target plate device is arranged at the output end of the purging pipeline. The target plate device is configured to receive the steam discharged from the purging pipeline and reflect the purging effect of the purging pipeline through the traces on the surface of the target plate.

[0012] In one of the embodiments, the temporary rush valve is an electrically controlled valve.

[0013] In one of the embodiments, a pressure monitoring module is further included. The pressure monitoring module is arranged between the adjusting valve and the temporary rush valve. The pressure monitoring module is configured to monitor the steam pressure data in the purging pipeline and send the steam pressure data to the control module.

[0014] In one of the embodiments, a temperature monitoring module is further included. The temperature monitoring module is arranged between the adjusting valve and the temporary rush valve. The temperature monitoring module is configured to monitor the steam temperature data in the purging pipeline and send the steam temperature data to the control module.

[0015] In one of the embodiments, a first trap is arranged at the output end of the steam pipeline. The first trap is configured to discharge the condensed water in the steam pipeline.

[0016] In one of the embodiments, a second trap is arranged on the purging pipeline. The second trap is configured to discharge the condensed water in the purging pipeline to the outside of the purging pipeline.

[0017] In one of the embodiments, a muffler is arranged at the output end of the purging pipeline.

[0018] In one of the embodiments, a third trap is arranged on the muffler.

[0019] In one embodiment, the output end of the regulating valve is connected with at least two purging pipes.

[0020] In one embodiment, the purging pipes are connected in parallel, and the control module is configured to control the purging pipes to be connected to the steam pipe alternately.

[0021] The steam pipe purging and target shooting device described above uses the flow monitoring module installed on the steam pipe to remotely monitor the steam flow data in the pipe, and sends the steam flow data to the control module. The control module determines the steam state of the steam pipe according to the steam flow data, and then remotely controls the opening degree of the regulating valve, so that the steam injected into the purging pipe meets the operation requirements. The control module remotely controls the temporary blowdown door to change the steam state in the purging pipe, and completes multiple repeated blowdown and pressure relief processes. Finally, the purging effect of the pipe is displayed by the target plate device. This implementation does not require on-site monitoring by workers, and does not require on-site personnel to operate valves, which helps to reduce the operation risk of personnel operating valves. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The figure is a flowchart of the steam pipe purging device in one embodiment.

[0023] Figure 2 The figure is a structural block diagram of the steam pipe purging device in one embodiment. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0025] In this embodiment, as described in Figure 1 and Figure 2 , a steam pipe purging and target shooting device is provided, which includes a flow monitoring module 110, a control module 100, a regulating valve 120, a temporary blowdown door 130 and a target plate device 200.

[0026] The flow monitoring module 110 is arranged on the steam pipe and is configured to obtain steam flow data in the steam pipe and send the steam flow data to the control module 100.

[0027] The control module 100 is electrically connected with the flow monitoring module 110 and is configured to control the opening degree of the regulating valve 120 and the temporary blowdown door 130 according to the steam flow data.

[0028] The regulating valve 120 is arranged at the output end of the steam pipeline, the input end of the regulating valve 120 is connected with the steam pipeline, the output end of the regulating valve 120 is connected with the purging pipeline, the opening degree of the regulating valve 120 is controlled by the instruction of the control module 100, and the regulating valve 120 is used for controlling the steam flow into the purging pipeline.

[0029] The impingement door 130 is arranged at the output end of the purging pipeline, the input end of the impingement door 130 is towards the output end of the regulating valve 120, the output end of the impingement door 130 is towards the target plate device 200, the opening and closing of the impingement door 130 is remotely controlled by the instruction of the control module 100, and the impingement door 130 is used for storing or releasing the steam in the purging pipeline.

[0030] The target plate device 200 is arranged at the output end of the purging pipeline, the target plate device 200 is used for receiving the steam discharged from the purging pipeline, and the cleaning effect of the purging pipeline is shown by the traces on the surface of the target plate.

[0031] In the embodiment, the input end of the steam pipeline is communicated with the output end of the steam generator, and the output end of the steam pipeline is communicated with the input end of the purging pipeline. The regulating valve 120 is installed at the connection between the steam pipeline and the purging pipeline, and the regulating valve 120 is used for controlling the steam flow into the purging pipeline. The impingement door 130 is installed on the purging pipeline, and the impingement door 130 is close to the output end of the purging pipeline. When the impingement door 130 is closed, the purging pipeline is in the steam storage state, and when the impingement door 130 is opened, the purging pipeline is in the pressure relief state. The flow monitoring module 110 is installed on the steam pipeline, and the flow monitoring module 110 includes a flow meter. The flow monitoring module 110 is used for monitoring the steam flow in the steam pipeline to obtain steam flow data. The input end of the control module 100 is electrically connected with the flow monitoring module 110, and the output end of the control module 100 is electrically connected with the regulating valve 120 and the impingement door 130 respectively. The control module 100 is a DCS (Distributed Control System) control system. After the control module 100 obtains the steam flow data of the steam pipeline, the opening degree of the regulating valve 120 is remotely controlled according to the steam flow data. Similarly, the opening degree of the impingement door 130 is remotely controlled by the control module 100. The target plate device 200 is installed at the output end of the purging pipeline, and the target plate device 200 is used for receiving the impurities blown out from the purging pipeline, and the cleaning condition of the purging pipeline is shown according to the traces on the target plate.

[0032] The steam generated by the steam generator flows into the purging pipeline through the steam pipeline. The flow monitoring module sends the steam flow data in the steam pipeline to the DCS control system in real time. The DCS control system remotely controls the regulating valve 120 according to the steam flow data, and changes the opening degree of the regulating valve 120. During the warm-up and pressure boosting process, the DCS control system controls the regulating valve 120 to be in an open state. During the purging process, the DCS control system controls the regulating valve 120 to be in a closed state. During the warm-up and pressure boosting process, the DCS control system remotely controls the temporary impact door 130 to be closed, and the steam pipeline injects steam into the purging pipeline, so that the steam accumulates and stores energy in the purging pipeline. During the purging process, the DCS control system controls the regulating valve 120 to be in a closed state, and releases the steam in the purging pipeline. Repeat the above steps. Finally, check the traces on the target plate device 200 at the output end of the purging pipeline to determine the cleaning condition in the purging pipeline. The DCS control system remotely controls the regulating valve 120 and the temporary impact door 130, which saves the trouble of manual operation, realizes unmanned on-site operation, and reduces the risk of personnel injury during construction operation.

[0033] In one embodiment, the temporary impact door 130 is an electrically controlled valve.

[0034] In this embodiment, the temporary impact door 130 is an electrically controlled valve, and the control end of the electrically controlled valve is electrically connected with the output end of the DCS control system. The electrically controlled valve is a short-stroke electrically controlled valve, and the full stroke time of the electrically controlled valve controlled by the DCS control system is not more than 60s. This enables the DCS control system to remotely control the electrically controlled valve, quickly open or close the temporary impact door 130 of the purging pipeline, and is beneficial to save the workload of manual operation and improve work efficiency.

[0035] In one embodiment, the pressure monitoring module 140 is further included, which is arranged between the regulating valve 120 and the temporary impact door 130, and is used for monitoring the steam pressure data in the purging pipeline and sending the steam pressure data to the control module 100.

[0036] In this embodiment, as Figure 1 and Figure 2The pressure monitoring module 140 includes a pressure gauge installed on the purging pipeline between the regulating valve 120 and the electric control valve. The pressure gauge is used to monitor the steam pressure of the purging pipeline and obtain steam pressure data. The output end of the pressure gauge is electrically connected to the input end of the DCS control system, and the pressure gauge remotely sends the steam pressure data to the DCS control system. The DCS control system analyzes the steam pressure data and controls the opening degree of the electric control valve and the regulating valve 120, so that the steam pressure in the purging pipeline meets the operation requirements. This reduces the workload of the staff in monitoring the steam pressure on site and achieves the effect of saving labor.

[0037] In one embodiment, a temperature monitoring module 150 is further included, which is arranged between the regulating valve 120 and the purge door 130. The temperature monitoring module 150 is used to monitor the steam temperature data in the purging pipeline and send the steam temperature data to the control module 100.

[0038] In this embodiment, as shown in Figure 1 and Figure 2 The temperature monitoring module 150 includes a thermometer installed on the purging pipeline between the regulating valve 120 and the pressure monitoring module 140. The output end of the thermometer is electrically connected to the output end of the DCS control system, which is used to obtain the steam temperature data in the purging pipeline and remotely send the steam temperature data to the DCS control system. The DCS control system analyzes the steam temperature data and controls the opening degree of the electric control valve and the regulating valve 120, so that the steam temperature in the purging pipeline meets the operation requirements. This also reduces the workload of the staff in monitoring the steam temperature on site and achieves the effect of saving labor. Moreover, the temperature of the steam in the purging process is more consistent with the expected value.

[0039] In one embodiment, a first trap 300 is arranged at the output end of the steam pipeline, which is used to drain the condensed water in the steam pipeline.

[0040] In this embodiment, as shown in Figure 2 The first trap 300 is installed at the output end of the steam pipeline and is close to the input end of the regulating valve 120. The first trap 300 is used to drain the water produced by steam condensation in the steam pipeline to the outside of the steam pipeline, reducing the impact of water hammer effect on the regulating valve 120.

[0041] In one embodiment, a second trap 400 is arranged on the purging pipeline, which is used to drain the condensed water in the purging pipeline to the outside of the purging pipeline.

[0042] In this embodiment, as shown in Figure 2The second steam trap 400 is installed on the purged pipe and is close to the input end of the flushing valve 130. The second steam trap 400 is used to discharge the water generated by the condensation of steam in the purged pipe to the outside of the purged pipe in a timely manner, so as to avoid water hammer impact on the purged pipe and the flushing valve 130.

[0043] In one embodiment, a silencer 500 is provided at the output end of the purged pipe.

[0044] In this embodiment, as Figure 2 A silencer 500 is installed at the output end of the purged pipeline, and a target plate 200 is located between the pressure relief valve 130 and the silencer 500. When the purged pipeline is depressurized, steam is discharged through the output end of the pressure relief valve 130, passes through the target plate 200, and then enters the silencer 500. The silencer 500 is used to reduce the noise of the discharged steam, thereby minimizing the noise impact of the purging operation.

[0045] In one embodiment, the silencer 500 is provided with a third hydrophobic device 510.

[0046] In this embodiment, as Figure 2 The third steam trap 510 is installed inside the silencer 500 because the output end of the silencer 500 is connected to the outside, and the silencer 500 is located at the output end of the purged pipeline. This results in the temperature of the silencer 500 being lower than the steam temperature inside the purged pipeline. When the steam comes into contact with the lower-temperature silencer 500, condensate easily accumulates inside. Using the third steam trap 510 allows for timely drainage of the condensate inside the silencer 500, which helps to extend the service life of the silencer 500.

[0047] In one embodiment, the output of the regulating valve 120 is connected to at least two purging pipes.

[0048] In this embodiment, as Figure 2 At least two purging pipelines are connected to the output end of the regulating valve 120. Each purging pipeline has the same equipment composition, including a second steam trap 400, a temperature monitoring module 150, a pressure monitoring module 140, a flush valve 130, a target plate device 200, a third steam trap 510, and a silencer 500. During purging operations, the control module 100 monitors the temperature monitoring module 150 and pressure monitoring module 140 on each purging pipeline to obtain the steam status of the corresponding pipeline. The control module 100 connects to each purging pipeline via the output end of the regulating valve 120, enabling the steam pipeline to simultaneously inject steam into multiple purging pipelines for energy storage and pressurization operations, thus improving work efficiency.

[0049] In one embodiment, the purged pipes are connected in parallel, and the control module 100 is used to control each purged pipe to alternately connect to the steam pipe.

[0050] In this embodiment, as Figure 2 The output of the regulating valve 120 is connected to the input of each purged pipeline via multiple pipes, making the purged pipelines interconnected in parallel with the output of the regulating valve 120. The pipeline purging process includes warming up, pressurizing, and purging, and needs to be repeated multiple times. Therefore, when any purged pipeline is in a purging and depressurization state, the control module 100 changes the position of the purged pipeline connected to the regulating valve 120, thereby switching the steam between different purged pipelines and injecting steam into other purged pipelines. This improves purging efficiency, avoids steam venting and waste in the steam pipeline, and reduces the workload of frequently adjusting the steam supply at the steam supply point.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A steam line purging targeting device, characterized by, The device comprises a flow monitoring module, a control module, a regulating valve, a temporary impact door and a target plate device. The flow monitoring module is arranged on the steam pipeline to acquire steam flow data in the steam pipeline and send the steam flow data to the control module. The control module is electrically connected with the flow monitoring module to control the opening degree of the regulating valve and the temporary impact door according to the steam flow data. The regulating valve is arranged at the output end of the steam pipeline, the input end of the regulating valve is connected with the steam pipeline, the output end of the regulating valve is connected with the purging pipeline, the opening and closing degree of the regulating valve is controlled by the instruction of the control module, and the regulating valve is used to control the steam flow flowing into the purging pipeline. The temporary impact door is arranged at a position close to the output end of the purging pipeline, the input end of the temporary impact door is directed to the output end of the regulating valve, the output end of the temporary impact door is directed to the target plate device, the opening and closing of the temporary impact door is remotely controlled by the instruction of the control module, and the temporary impact door is used to store or release the steam in the purging pipeline. The target plate device is arranged at the output end of the purging pipeline, the target plate device is used to receive the steam discharged from the purging pipeline, and the purging effect of the purging pipeline is reflected by the traces on the surface of the target plate.

2. The steam line purging targeting device of claim 1, wherein, The temporary impact door is an electrically controlled valve.

3. The steam line purging targeting device of claim 1, wherein, The device further comprises a pressure monitoring module arranged between the regulating valve and the temporary impact door, the pressure monitoring module is used to monitor the steam pressure data in the purging pipeline and send the steam pressure data to the control module.

4. The steam line purging targeting device of claim 1, wherein, The device further comprises a temperature monitoring module arranged between the regulating valve and the temporary impact door, the temperature monitoring module is used to monitor the steam temperature data in the purging pipeline and send the steam temperature data to the control module.

5. The steam line purging targeting device of claim 1, wherein, The output end of the steam pipeline is provided with a first drain trap for discharging the condensed water in the steam pipeline.

6. The steam line purging targeting device of claim 1, wherein, The purging pipeline is provided with a second drain trap for discharging the condensed water in the purging pipeline to the outside of the purging pipeline.

7. The steam line purging targeting device of claim 1, wherein, The output end of the purging pipeline is provided with a silencer.

8. The steam line purging targeting device of claim 7, wherein, The silencer is provided with a third drain trap.

9. A steam line purging targeting device as defined in any one of claims 1-8, characterized in that The output end of the regulating valve is connected with at least two purging pipelines.

10. The steam line purging targeting device of claim 9, wherein, The purging pipelines are connected in parallel, and the control module is used to control the purging pipelines to be connected with the steam pipeline alternately.

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