Improved sampling frame automatic blowdown system

Abstract

The invention provides an improved sampling frame automatic blowdown system, which relates to the technical field of mechanical engineering and comprises a high-temperature desuperheater, a blowdown pipeline branch pipe, a blowdown main pipe, a low-temperature desuperheater, an electric blowdown valve and an electric isolation valve, the high-temperature desuperheater is connected with the low-temperature desuperheater through a blow-off pipeline branch pipe; the number of the blow-off pipeline branch pipes is multiple, the number of the blow-off main pipe is one, and the multiple blow-off pipeline branch pipes are communicated with the blow-off main pipe. The electric blow-off valve is arranged on the blow-off pipeline branch pipe and is arranged at one end, close to the blow-off main pipe, of the blow-off pipeline branch pipe; and the electric isolation valve is arranged on the branch pipe of the blow-off pipeline and is arranged at one end, close to the low-temperature desuperheater, of the branch pipe of the blow-off pipeline. The design of the electric isolation valve is added to solve the problem that sewage can still enter a follow-up system due to the fact that a common sewage discharge mother pipe can only discharge sewage in a single way; and reasonable automatic control logic is designed, so that effective operation of the design of the electric isolation valve is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical engineering, and in particular relates to an improved automatic sewage discharge system for a sampling rack. Background Art

[0002] The power plant unit sampler is mainly used to extract small representative samples from the boiler, steam pipe or other fluid system of the power plant for water or steam quality analysis. This is essential for monitoring the operating status of the system, preventing corrosion and scaling, and ensuring the safe and efficient operation of the equipment. The high-temperature sampling rack is a device that continuously samples high-temperature and high-pressure water and steam samples by reducing temperature and pressure, so that high-temperature and high-pressure water and steam samples are converted into qualified water samples. In order to avoid clogging of the sampling tube and ensure qualified sampling, the high-temperature sampling rack needs to be regularly drained to ensure the normal operation of the sampling system. Therefore, daily monitoring of the drainage water and steam of the high-temperature sampling rack is of great significance.

[0003] The "drainage system" usually refers to the part that discharges unnecessary fluids from the sampler. During the sampling process, water samples are taken from the important steam and water pipes of the unit, concentrated and led to the sampling rack for cooling and pressure reduction through the desuperheater and pressure reducing valve, and then sent to subsequent chemical analysis instruments and other testing equipment to grasp the water quality conditions at various locations during the operation of the unit. During the startup of the unit, the water quality in each pipeline is poor, and there are many impurities such as rust. If a large amount of impurities enter the pressure reducing valve, it is easy to cause jamming, blockage and other faults. Therefore, it is necessary to drain the pipeline when the unit is started and discharge the sewage in advance.

[0004] At present, the original sewage discharge system of the sampling rack of the power plant unit needs to be manually operated, and the timeliness and effect of sewage discharge are poor, resulting in frequent failures caused by impurities blocking the subsequent sampling system. An automated and effective sewage discharge system is needed to improve the sewage discharge effect. Summary of the invention

[0005] The present invention provides an improved automatic sewage discharge system for a sampling rack, which is used to solve at least one of the above-mentioned technical problems.

[0006] In order to solve the above technical problems, the present invention discloses an improved automatic sewage discharge system for a sampling rack, comprising a high-temperature desuperheater, a sewage discharge pipeline branch pipe, a sewage discharge main pipe, a low-temperature desuperheater, an electric sewage discharge valve, and an electric isolation valve;

[0007] The high temperature desuperheater is connected to the low temperature desuperheater through a sewage pipeline branch pipe, and a plurality of the high temperature desuperheaters and the low temperature desuperheaters are provided;

[0008] There are multiple sewage pipeline branches, one sewage main pipe is provided, the multiple sewage pipeline branches are respectively connected to multiple high-temperature desuperheaters and low-temperature desuperheaters, and the sewage outlets of the multiple sewage pipeline branches are connected to the sewage main pipe;

[0009] The electric sewage valve is arranged on the sewage pipeline branch pipe, and is arranged at one end of the sewage pipeline branch pipe close to the sewage main pipe;

[0010] The electric isolating valve is arranged on the sewage pipe branch, and is arranged at one end of the sewage pipe branch close to the low-temperature desuperheater.

[0011] Preferably, in the above-mentioned improved automatic sewage discharge system of the sampling rack, the high-temperature desuperheater is provided with a water inlet and a water outlet, the water inlet is connected to a water sample inlet pipe, and the water outlet is connected to a sewage pipe branch and connected to the water inlet end of the sewage pipe branch;

[0012] The low-temperature desuperheater is provided with a water inlet and a water outlet, and the water inlet is connected to a sewage pipeline branch pipe and is connected to the water outlet end of the sewage pipeline branch pipe.

[0013] Preferably, in the above-mentioned improved automatic sewage discharge system of the sampling rack, the sewage discharge pipeline branch pipe is provided with multiple channels, the water inlet ends of which are respectively connected to the water outlets of the multiple high-temperature desuperheaters, and the water discharge ends of which are respectively connected to the water inlets of the multiple low-temperature desuperheaters, and the sewage discharge pipeline branch pipe is used to transmit the inlet water sample and the sewage after being cooled by the high-temperature desuperheater, and each sewage discharge pipeline branch pipe is independently arranged;

[0014] The sewage main pipe is connected to the sewage discharge ends of the plurality of sewage pipeline branches, and the plurality of sewage pipeline branches are connected to the same sewage pipeline branch for discharging sewage.

[0015] Preferably, in the above-mentioned improved automatic sewage discharge system of the sampling rack, the electric sewage discharge valve is provided with a plurality of them, which are respectively provided on the sewage discharge pipeline branch pipes corresponding to the plurality of sewage discharge pipeline branch pipes, one sewage discharge pipeline branch pipe corresponds to one electric sewage discharge valve, and the electric sewage discharge valve is provided near the connection between the sewage discharge pipeline branch pipe and the sewage discharge main pipe;

[0016] Preferably, in the above-mentioned improved automatic sewage discharge system of the sampling rack, a plurality of electric isolating valves are provided, which correspond to a plurality of sewage pipe branches and are respectively provided on the sewage pipe branches, one sewage pipe branch corresponds to one electric isolating valve, and the electric isolating valve is provided near the connection between the sewage pipe branch and the water inlet main pipe.

[0017] Preferably, in the above-mentioned improved automatic sewage discharge system of the sampling rack, the water outlet of the low-temperature desuperheater is connected to a pressure reducing valve and other detection equipment through a pipeline, so that the water sample can be subsequently processed.

[0018] Preferably, the above-mentioned improved automatic sewage discharge system of the sampling rack also includes a programmable logic controller, which is electrically connected to the multiple electric sewage discharge valves and electric isolation valves respectively. The controller can control the opening and closing of the multiple electric sewage discharge valves and electric isolation valves respectively, and can set time nodes through the programmable logic controller to control the sewage discharge time of different sewage pipeline branches to achieve precise control.

[0019] Preferably, the above-mentioned improved automatic sewage discharge system of the sampling rack further includes an alarm system, wherein the alarm system includes a plurality of flow sensors, the plurality of flow sensors are connected to the editable logic controller signal, and the detection heads thereof are arranged on the branch pipe of the sewage discharge pipeline;

[0020] When the water flow in the branch pipe of the sewage pipeline flows normally, the detection signal of the flow sensor is normal;

[0021] When the water flow in the branch pipe of the sewage pipeline is not flowing or the flow rate slows down, the flow sensor detects an abnormal signal and transmits the abnormal signal to the editable logic controller for alarm. The staff can promptly check the abnormal conditions of the electric sewage valve and the electric isolation valve.

[0022] Preferably, in the above-mentioned improved automatic sewage discharge system for the sampling rack, the control method of the automatic sewage discharge system is as follows:

[0023] When the unit is started, all electric isolation valves are closed first to isolate the sewage in the pipe connecting the sewage pipe branch and the electric isolation valve and the electric sewage valve, so that the sewage will not flow into the low-temperature desuperheater, thereby protecting the subsequent pressure reducing valve and other detection equipment;

[0024] When discharging sewage, first open the electric sewage valve of a certain route, discharge the sewage in front of the electric isolation valve from the sewage main pipe through the sewage pipeline branch pipe for a period of time, then close the electric sewage valve of this route, and then open the electric isolation valve of this route, so that the purified water can enter the subsequent sampling system normally;

[0025] Repeat the above steps in sequence until the water samples in all sewage pipe branches are flowing normally.

[0026] Preferably, in the above-mentioned improved automatic sewage discharge system of the sampling rack, the sewage discharge time in each branch pipe of the sewage discharge pipeline can be controlled by a programmable logic controller.

[0027] Compared with the prior art, the present invention has the following beneficial effects: the design of an electric isolating valve is added to solve the problem that the shared sewage main pipe can only discharge sewage in one way, resulting in sewage still being able to enter the subsequent system; the reasonably designed automatic control logic ensures the effective operation of the design of the electric isolating valve, and does not affect the sampling needs of the operating personnel, solves the problem that manual sewage discharge, sewage discharge timeliness and sewage discharge effect are poor, resulting in frequent failures caused by impurity blockage in the subsequent sampling system, and multiple electric isolating valves are respectively arranged on multiple sewage pipeline branches to solve the problem that multiple sewage pipeline branches are connected to a sewage main pipe in the existing sewage discharge scheme, so that when sewage is discharged from one pipeline, sewage from other pipelines can still enter the pressure reducing valve, and the problem of not being able to effectively prevent sewage from entering the pressure reducing valve when the unit is started, the electric isolating valves of different pipelines are closed as appropriate to ensure that sewage impurities do not enter the subsequent equipment, and by sealing the sewage in the sewage pipeline branch for a period of time, the cooling burden of the desuperheater and subsequent sewage treatment caused by long-term and large-scale sewage discharge is also avoided. The alarm system is designed to generate a fault alarm signal when a fault occurs to inform the operator, so as to improve the economic, safe and intelligent operation of the unit, reduce the operation of the on-duty personnel, reduce the risk of leakage, make the equipment maintenance work more targeted, make the work of the operator safer and more convenient, and effectively ensure the stability of water quality. The automated design does not require manual operation by the operator during the entire sewage discharge process, ensuring the personal safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 It is a structural schematic diagram of the automatic sewage discharge system of the improved sampling rack in the embodiment of the present invention;

[0030] In the figure: 1. high-temperature desuperheater; 2. sewage pipeline branch pipe; 3. sewage main pipe; 4. low-temperature desuperheater; 5. electric sewage valve; 6. electric isolation valve; 7. water sample inlet pipe; 8. pressure reducing valve and other detection equipment; 9. programmable logic controller. DETAILED DESCRIPTION

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0033] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the meaning of order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described in the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. The terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a product or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such products or devices. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the product or device including the elements.

[0034] See attached Figure 1 As shown, an improved automatic sewage discharge system for a sampling rack is disclosed in the embodiment of the present application, including a high-temperature desuperheater 1, a sewage discharge pipeline branch pipe 2, a sewage discharge main pipe 3, a low-temperature desuperheater 4, an electric sewage discharge valve 5, and an electric isolation valve 6;

[0035] The high temperature desuperheater 1 is connected to the low temperature desuperheater 4 through a sewage pipe branch 2, and a plurality of the high temperature desuperheaters 1 and the low temperature desuperheaters 4 are provided;

[0036] There are multiple sewage pipeline branches 2, and one sewage main pipe 3. The multiple sewage pipeline branches 2 are respectively connected to multiple high-temperature desuperheaters 1 and low-temperature desuperheaters 4, and the sewage outlets of the multiple sewage pipeline branches 2 are connected to the sewage main pipe 3.

[0037] The electric sewage valve 5 is arranged on the sewage pipeline branch pipe 2, and is arranged at one end of the sewage pipeline branch pipe 2 close to the sewage main pipe 3;

[0038] The electric isolation valve 6 is arranged on the sewage pipe branch 2 , and is arranged at one end of the sewage pipe branch 2 close to the low-temperature desuperheater 4 .

[0039] Embodiment 1

[0040] An improved automatic sewage discharge system for a sampling rack comprises a high-temperature desuperheater 1, a sewage discharge pipeline branch pipe 2, a sewage discharge main pipe 3, a low-temperature desuperheater 4, an electric sewage discharge valve 5, and an electric isolation valve 6;

[0041] The high-temperature desuperheater 1 is provided with a water inlet and a water outlet, wherein the water inlet is connected to a water sample inlet pipe 7, and the water outlet is connected to a sewage pipe branch 2 and is connected to the water inlet end of the sewage pipe branch 2;

[0042] The low-temperature desuperheater 4 is provided with a water inlet and a water outlet. The water inlet is connected to the sewage pipe branch 2 and is connected to the water outlet end of the sewage pipe branch 2.

[0043] Specifically, the high-temperature desuperheater 1 is usually installed in the sampling system near the sampling point. In this embodiment, it is connected to the water sample inlet pipe to reduce the temperature of steam or hot water from the boiler or other high-temperature equipment to a safer and controllable level. Cooling water or air is used as the cooling medium to reduce the temperature of the high-temperature steam or hot water to the safe temperature required for the next decompression stage. Sometimes it will work with the pressure reducing valve to reduce the pressure of the high-temperature fluid and avoid the flash phenomenon caused by direct decompression, thereby protecting the downstream equipment from overpressure damage. By cooling first and then reducing pressure, the high-temperature and high-pressure fluid is prevented from damaging the downstream instruments, valves and other equipment, and the service life of the equipment is extended. In this embodiment, some of the sewage pipe branches contain water samples that need to be cooled, which are connected to the high-temperature desuperheater for cooling. Some of the sewage pipe branches may contain water samples that do not need to be cooled, which are directly connected to the water sample inlet pipe. The connection of the pipeline can be determined according to the actual situation.

[0044] The low-temperature cooler 4 is usually located at the later stage of the sampling system and is connected to the high-temperature cooler 1. After the fluid undergoes preliminary cooling and decompression, it further adjusts the temperature and pressure of the fluid to make it suitable for final sampling and analysis. To ensure that the temperature of the fluid is suitable for a specific detection instrument and analysis process, it is usually necessary to control the temperature at a relatively stable and low level. The low-temperature cooler 4 can help stabilize the fluid state and avoid the measurement accuracy being affected by temperature fluctuations. Some low-temperature coolers may also integrate filtering and flow regulation functions to ensure that the fluid entering the analysis equipment is clean and maintains a constant flow rate, thereby improving the reliability of the analysis results. The low-temperature cooler 4 in the embodiment of the present application can be selected according to actual needs. The high-temperature cooler 1 and the low-temperature cooler 4 work together to ensure that the fluid sampled from a high-temperature and high-pressure environment can be accurately analyzed and monitored without damaging downstream equipment.

[0045] The sewage pipe branch 2 is provided with multiple channels, the water inlet ends of which are respectively connected to the water outlets of the plurality of high-temperature desuperheaters 1, and the water discharge ends thereof are respectively connected to the plurality of low-temperature desuperheaters 4. The sewage pipe branch 2 is used to transmit the inlet water sample cooled by the high-temperature desuperheater 1 and to transport sewage;

[0046] The sewage main pipe 3 is connected to the sewage discharge ends of the plurality of sewage pipe branches 2 for discharging sewage.

[0047] It should be noted that the sewage pipe branch 2 is provided with fourteen pipes, which are respectively connected to 14 high-temperature coolers 1 and 14 low-temperature coolers 4. Since the pressure difference between different water samples may cause backflow, and the sampling rack has a total of fourteen pipes, the sewage outlet of the sewage pipe branch 2 is required to enter the same sewage main pipe 3. Therefore, the sampling rack can only have one water sample pipe for sewage discharge at the same time, and the sewage ends of multiple sewage pipe branches 2 are connected to the sewage main pipe 3.

[0048] There are multiple electric sewage valves 5, which are respectively arranged on the sewage pipe branch pipes 2 corresponding to the multiple sewage pipe branch pipes 2, one sewage pipe branch pipe 2 corresponds to one electric sewage valve 5, and the electric sewage valve 5 is arranged near the connection between the sewage pipe branch pipe 2 and the sewage main pipe 3;

[0049] There are multiple electric isolating valves 6, which are respectively arranged on the sewage pipe branch pipes 2 corresponding to multiple sewage pipe branches 2. One sewage pipe branch pipe 2 corresponds to one electric isolating valve 6. The electric isolating valve 6 is arranged near the connection between the sewage pipe branch pipe 2 and the water inlet main pipe 9.

[0050] In order to further optimize the above technical solution, the water outlet of the low-temperature desuperheater 4 is connected to a pressure reducing valve and other detection equipment 8 through a pipeline, so that the water sample can be subsequently processed.

[0051] Specifically, in order to solve the problem that in the existing sewage discharge scheme, when one pipeline is discharged, the sewage from the other thirteen pipelines still enters the pressure reducing valve, and cannot effectively prevent the sewage from entering the pressure reducing valve when the unit is started, the present application adds an electric isolation valve 6 to each pipeline, and the sewage section of the sewage pipeline branch 2 is before the electric isolation valve 6. The sewage to be discharged first enters the sewage section of the sewage pipeline branch 2 for storage. Under the interruption of the electric isolation valve 6, it will not flow into other equipment 8 such as the pressure reducing valve. Each sewage pipeline branch 2 is equipped with an electric sewage valve 5, which can discharge sewage in different pipelines in turn, and finally realize the circulation of clean water in each pipeline.

[0052] The working mode of the electric sewage valve 5 and the electric isolation valve 6 is as follows: after the water sample enters the sampling rack, it first enters the high-pressure cooler 1 (some routes with lower water inlet temperatures do not have this equipment), and then passes through the sewage pipe branch 2 in front of the electric isolation valve 6. If the electric sewage valve 5 is opened, it is discharged into the sewage main pipe 3; if the electric sewage valve 5 is closed and the electric isolation valve 6 is opened, it enters the low-temperature cooler 4, and then enters the pressure reducing valve and subsequent detection equipment; if the electric sewage valve 5 and the electric isolation valve 6 are both closed, the water sample is blocked and cannot flow.

[0053] In order to further optimize the above technical solution, a programmable logic controller 9 is also included. The programmable logic controller 9 is electrically connected to the multiple electric sewage valves 5 and the electric isolation valves 6 respectively. The controller can control the opening and closing of the multiple electric sewage valves 5 and the electric isolation valves 6 respectively. The time node can be set through the programmable logic controller 9 to control the sewage discharge time of different sewage pipeline branches 2 to achieve precise control.

[0054] It should be noted that a programmable logic controller 9 is provided, and all electric drain valves 5 and electric isolation valves 6 are uniformly controlled by a PLC (programmable logic controller). The specific control logic is as follows:

[0055] In the normal sampling state, the electric isolation valve 6 is open, the electric sewage valve 5 is closed, and the water sample flows normally along the main pipeline;

[0056] The unit is ready to start. When it is started, the superior system sends a signal to the programmable logic controller 9, and all electric isolation valves 6 are closed (the electric isolation valve is closed, the electric sewage valve is closed, and the water sample is blocked and cannot flow).

[0057] The unit is ready for flushing (when the parameter reaches a certain set value, the upper system sends a signal to the programmable logic controller), and each water sample begins to discharge sewage in turn. The specific process is as follows:

[0058] Open the first electric drain valve 5;

[0059] Wait for a longer set time;

[0060] Close the first electric drain valve 5;

[0061] Open the first electric isolation valve 6 (at this time, the first water sample has returned to the normal sampling state);

[0062] Open the second electric drain valve 5;

[0063] Wait for a longer set time;

[0064] Close the second electric drain valve 5;

[0065] Open the second electric isolation valve 6 (at this time, the first and second water samples have returned to normal sampling status);

[0066] Repeat the above steps for the third to fourteenth water samples until the last electric isolation valve is opened (at this time all water samples have returned to normal sampling status).

[0067] All the above-mentioned valve switching actions need to wait until the previous action is completed (the valve is fully opened or closed) before the next action can be executed.

[0068] Setting a programmable logic controller 9 to control the electric valve in the sampling rack system not only improves the accuracy and efficiency of sampling, but also enhances the stability and safety of the system. The specific contents are as follows:

[0069] Precise control: PLC can accurately control the opening of the electric valve to ensure that the volume or flow rate of each sample is consistent, which is especially important for application scenarios that require precise measurement of samples.

[0070] Automated operation: PLC can realize automated processes, reduce manual intervention, improve the efficiency and safety of the sampling process, and also reduce the labor intensity of operators.

[0071] Remote monitoring and operation: Through PLC and the corresponding communication network, the status of the electric valve can be remotely monitored and remotely operated, which is especially important for sampling operations in hazardous environments.

[0072] Logic control and sequential operation: PLC can control the sequential operation of multiple electric valves according to the preset logic program to ensure the accuracy and continuity of the sampling process.

[0073] Data recording and analysis: PLC can record the operating data of electric valves, such as opening and closing times, opening degree, time, etc., which is helpful for subsequent data analysis and formulation of maintenance plans.

[0074] Energy saving and cost-effectiveness: By optimizing the control strategy, PLC can reduce unnecessary power consumption of electric valves, save energy consumption in long-term operation, and improve the cost-effectiveness of the overall system.

[0075] Embodiment 2

[0076] An improved automatic sewage discharge system for a sampling rack comprises a high-temperature desuperheater 1, a sewage discharge pipeline branch pipe 2, a sewage discharge main pipe 3, a low-temperature desuperheater 4, an electric sewage discharge valve 5, and an electric isolation valve 6; the high-temperature desuperheater 1 is connected to the low-temperature desuperheater 4 via the sewage discharge pipeline branch pipe 2; a plurality of sewage discharge pipeline branches 2 are provided, and one sewage discharge main pipe 3 is provided, and the plurality of sewage discharge pipeline branches 2 are respectively connected to the sewage discharge main pipe 3; the electric sewage discharge valve 5 is provided on the sewage discharge pipeline branch pipe 2, and is provided at one end of the sewage discharge pipeline branch pipe 2 close to the sewage discharge main pipe 3; the electric isolation valve 6 is provided on the sewage discharge pipeline branch pipe 2, and is provided at one end of the sewage discharge pipeline branch pipe 2 close to the low-temperature desuperheater 4.

[0077] It also includes an alarm system, which includes a plurality of flow sensors, which are connected to the editable logic controller 9 by signal, and whose detection heads are arranged on the sewage pipeline branch pipe 2;

[0078] When the water flow in the sewage pipe branch 2 is flowing normally, the flow sensor detection signal is normal;

[0079] When the water in the sewage pipe branch 2 does not flow or the flow rate slows down, the flow sensor detects an abnormal signal and transmits the abnormal signal to the editable logic controller 9 for alarm. The staff can promptly check the abnormal conditions of the electric sewage valve 5 and the electric isolation valve 6.

[0080] Specifically, the PLC system can integrate fault detection functions, usually has good compatibility and scalability, and can be easily connected to other control systems or devices, such as temperature sensors, pressure sensors and other sensor components to form a more complete control system; in this embodiment, the programmable logic controller 9 is connected to the alarm system, and a flow sensor is set. When the electric valve does not respond as expected or an abnormality occurs, an alarm can be issued in time to avoid further damage or accidents. The flow alarm system can monitor the liquid flow through the valve in real time. Once the flow deviates from the preset range, the alarm is triggered immediately, so that the operator can quickly notice the potential problem. When the valve is partially blocked, completely closed or mechanically faulty, the alarm system can detect and notify the operator in time to avoid the impact caused by insufficient or excessive flow for a long time. Timely alarms help prevent production interruptions, equipment damage or safety accidents caused by abnormal flow, such as pipeline overpressure, leakage or pollution. Abnormal flow may lead to excessive consumption or waste of raw materials. By adjusting or repairing the valve in time, resources can be effectively saved and costs can be reduced. The flow alarm can not only point out the current problem, but also serve as an early warning mechanism to help predict the maintenance needs of the valve, facilitate the arrangement of maintenance plans in advance, and reduce unplanned downtime. The alarm system can also be equipped with a data logging function to store historical flow data for trend analysis, fault diagnosis or performance evaluation, providing a basis for future system optimization. By timely detecting and responding to valve failures, the flow alarm system reduces the risk to operators. The application of the flow alarm system in the sampling rack system not only improves the reliability and safety of the system, but also optimizes production efficiency.

[0081] Embodiment 3

[0082] In the improved automatic drainage system for sampling racks described in the first and second embodiments above, the control method of the automatic drainage system is as follows:

[0083] When the unit is started, all the electric isolation valves 6 are closed first to isolate the sewage in the pipeline connecting the sewage pipeline branch 2 and the electric isolation valve 6 and the electric sewage valve 5, so that the sewage will not flow into the low-temperature desuperheater 4, thereby protecting the subsequent pressure reducing valve and other detection equipment;

[0084] When discharging sewage, first open the electric sewage valve 5 of a certain route, discharge the sewage before the electric isolation valve 6 from the sewage main pipe 3 through the sewage pipeline branch pipe 2 for a period of time, then close the electric sewage valve 5 of this route, and then open the electric isolation valve 6 of this route, so that the purified water can enter the subsequent sampling system normally;

[0085] Repeat the above steps in sequence until the water samples in all sewage pipe branches 2 are flowing normally.

[0086] In order to further optimize the above technical solution, the sewage discharge time in each of the sewage pipeline branches can be controlled by a programmable logic controller 9.

[0087] The beneficial effects of the technical solution of the present application are as follows: the design of the electric isolation valve is added to solve the problem that the common sewage main pipe can only discharge sewage in one way, resulting in sewage still entering the subsequent system; the reasonable design of automatic control logic ensures the effective operation of the design of the electric isolation valve without affecting the sampling needs of the operating personnel, and solves the problem of manual sewage discharge, poor sewage discharge timeliness and sewage discharge effect, resulting in frequent failures caused by impurities blocking the subsequent sampling system;

[0088] A plurality of electric isolating valves are respectively arranged on a plurality of sewage pipe branches to solve the problem that in the existing sewage discharge scheme, a plurality of sewage pipe branches are connected to a sewage main pipe, so that when sewage is discharged from one pipe, sewage from other pipes can still enter the pressure reducing valve, and the problem of sewage entering the pressure reducing valve when the unit is started cannot be effectively prevented. The electric isolating valves of different pipes are closed as appropriate to ensure that sewage impurities do not enter subsequent equipment. In addition, the design of sealing sewage in the sewage pipe branch for a period of time also avoids the cooling burden of the desuperheater and subsequent sewage treatment caused by long-term and large-scale sewage discharge.

[0089] The alarm system is designed to generate a fault alarm signal when a fault occurs to inform the operator, so as to improve the economic, safe and intelligent operation of the unit, reduce the operation of the on-duty personnel, reduce the risk of leakage, make the equipment maintenance work more targeted, make the work of the operator safer and more convenient, and effectively ensure the stability of water quality. The automated design does not require manual operation by the operator during the entire sewage discharge process, ensuring the personal safety of the staff.

[0090] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An improved automatic sewage discharge system for a sampling rack, characterized in that: Including high temperature desuperheater, sewage pipeline branch pipe, sewage main pipe, low temperature desuperheater, electric sewage valve, electric isolation valve; The high temperature desuperheater is connected to the low temperature desuperheater through a sewage pipeline branch pipe, and a plurality of the high temperature desuperheaters and the low temperature desuperheaters are provided; There are multiple sewage pipeline branches, one sewage main pipe is provided, the multiple sewage pipeline branches are respectively connected to multiple high-temperature desuperheaters and low-temperature desuperheaters, and the sewage outlets of the multiple sewage pipeline branches are connected to the sewage main pipe; The electric sewage valve is arranged on the sewage pipeline branch pipe, and is arranged at one end of the sewage pipeline branch pipe close to the sewage main pipe; The electric isolating valve is arranged on the sewage pipe branch, and is arranged at one end of the sewage pipe branch close to the low-temperature desuperheater.

2. The improved automatic sewage discharge system of the sampling rack according to claim 1 is characterized in that: The high-temperature desuperheater is provided with a water inlet and a water outlet, wherein the water inlet is connected to a water sample inlet pipe, and the water outlet is connected to a sewage pipe branch and is connected to the water inlet end of the sewage pipe branch; The low-temperature desuperheater is provided with a water inlet and a water outlet, and the water inlet is connected to a sewage pipeline branch pipe and is connected to the water outlet end of the sewage pipeline branch pipe.

3. The improved automatic sewage discharge system of the sampling rack according to claim 2 is characterized in that: The sewage pipe branch is provided with multiple channels, the water inlet ends of which are respectively connected to the water outlets of the multiple high-temperature desuperheaters, and the water discharge ends of which are respectively connected to the water inlets of the multiple low-temperature desuperheaters. The sewage pipe branch is used to transmit the inlet water sample cooled by the high-temperature desuperheater and to transport sewage, and each sewage pipe branch is independently provided; The sewage main pipe is connected to the sewage discharge ends of the plurality of sewage pipeline branches, and the plurality of sewage pipeline branches are connected to the same sewage main pipe for discharging sewage.

4. The improved automatic drainage system for sampling rack according to claim 3 is characterized by: There are multiple electric sewage valves, which correspond to multiple sewage pipeline branches and are arranged on the sewage pipeline branches respectively. One sewage pipeline branch corresponds to one electric sewage valve, and the electric sewage valve is arranged near the connection between the sewage pipeline branch and the sewage main pipe.

5. The improved automatic drainage system for sampling rack according to claim 4 is characterized by: There are multiple electric isolating valves, which are respectively arranged on the sewage pipe branches corresponding to the multiple sewage pipe branches. One sewage pipe branch corresponds to one electric isolating valve, and the electric isolating valve is arranged near the connection between the sewage pipe branch and the water inlet main pipe.

6. The improved automatic sewage discharge system of the sampling rack according to claim 5 is characterized by: The water outlet of the low-temperature desuperheater is connected to a pressure reducing valve and other detection equipment through a pipeline, and the water sample can be subsequently processed.

7. The improved automatic drainage system for sampling rack according to claim 6 is characterized by: It also includes a programmable logic controller, which is electrically connected to the multiple electric sewage valves and electric isolation valves respectively. The controller can control the opening and closing of the multiple electric sewage valves and electric isolation valves respectively. The time node can be set through the programmable logic controller to control the sewage discharge time of different sewage pipeline branches to achieve precise control.

8. The improved automatic sewage discharge system of the sampling rack according to claim 7 is characterized by: It also includes an alarm system, which includes a plurality of flow sensors, which are connected to the editable logic controller by signal, and whose detection heads are arranged on the branch pipes of the sewage pipeline; When the water flow in the branch pipe of the sewage pipeline flows normally, the detection signal of the flow sensor is normal; When the water flow in the branch pipe of the sewage pipeline is not flowing or the flow rate slows down, the flow sensor detects an abnormal signal and transmits the abnormal signal to the editable logic controller for alarm. The staff can promptly check the abnormal conditions of the electric sewage valve and the electric isolation valve.

9. The improved automatic sewage discharge system of the sampling rack according to claim 8 is characterized in that: The control method of the automatic sewage discharge system is as follows: When the unit is started, all electric isolation valves are closed first to isolate the sewage in the pipe connecting the sewage pipe branch and the electric isolation valve and the electric sewage valve, so that the sewage will not flow into the low-temperature desuperheater, thereby protecting the subsequent pressure reducing valve and other detection equipment; When discharging sewage, first open the electric sewage valve of a certain route, discharge the sewage in front of the electric isolation valve from the sewage main pipe through the sewage pipeline branch pipe for a period of time, then close the electric sewage valve of this route, and then open the electric isolation valve of this route, so that the purified water can enter the subsequent sampling system normally; Repeat the above steps in sequence until the water samples in all sewage pipe branches are flowing normally.

10. The improved automatic sewage discharge system of the sampling rack according to claim 9, characterized in that: The sewage discharge time in each of the sewage discharge pipeline branches can be controlled by a programmable logic controller.

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