High temperature gas-cooled reactor wastewater discharge device and method

Abstract

The present invention provides a high-temperature gas-cooled reactor wastewater discharge device and method, belonging to the field of nuclear power technology. The device of the present invention comprises: a wastewater discharge pipeline, a dosing calculation unit, and a dosing unit; the first end of the wastewater discharge pipeline is connected to the wastewater discharge port of the resin regeneration tower, the second end of the wastewater discharge pipeline is connected to the wastewater neutralization tank, the dosing calculation unit is arranged on the wastewater discharge pipeline, so as to obtain dosing information according to the wastewater flow rate and the first pH value in the wastewater discharge pipeline; the dosing unit is respectively connected to the dosing calculation unit and the wastewater neutralization tank, so as to add a preset amount of medicine to the wastewater neutralization tank according to the dosing information, so that the second pH value of the wastewater in the wastewater neutralization tank reaches the discharge standard. The present invention can avoid the neutralized acid mist from returning to the factory building to pollute the environment, avoid equipment corrosion, and can realize full-automatic adjustment of the dosing amount, automatically adjust the pH value of the wastewater, solve the problem of being unable to accurately control the dosing amount, and improve the neutralization efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to a high-temperature gas-cooled reactor wastewater discharge device and method. Background Art

[0002] During the commissioning of the condensate polishing system of the high-temperature gas-cooled reactor demonstration project, the resin regeneration wastewater needs to be treated with acid and alkali neutralization. After the water quality meets the standards, it is discharged into the circulating water siphon well and finally into the sea.

[0003] The acidity and alkalinity of the regeneration wastewater of the high temperature gas-cooled reactor are relatively high. At present, it flows through the conventional island plant and the secondary circuit thermal dosing room through the drainage ditch, and the ditch is covered with a grid plate. It flows into the wastewater neutralization tank, starts the wastewater pump, and operates the self-circulation neutralization. When the pH value reaches the standard range of 6-9, the wastewater neutralization pump is switched to the discharge pipeline and discharged to the siphon well.

[0004] Acid mist is generated during the drainage process of acidic wastewater, which will corrode the equipment around the drainage ditch through the grille plate, accelerate the aging of the condensate polishing system and the secondary circuit dosing system, and affect the operating life and stability. The addition of acid to the wastewater neutralization tank will aggravate the generation of acid mist, causing the fire alarm to be triggered multiple times in the thermal dosing room. The acid mist concentration is too high, and personnel cannot enter the plant to work.

[0005] The steam generator of a high-temperature gas-cooled reactor has extremely high requirements for water quality. The condensate polishing system is a continuously operating system. Due to the frequent regeneration of the anion and cation resins, the ditch drainage method cannot obtain the pH value of the wastewater. In addition, the adjustment of the acid and alkali dosage through the valve is relatively rough and cannot accurately control the dosage. The system cannot achieve automatic dosing. In addition, adjusting the pH value through manual dosing requires repeated experiments, and the process of reaching the standard is extremely slow, consuming a lot of manpower and material resources. Furthermore, since an electric door is installed in the wastewater discharge recirculation pipeline, the wastewater discharge pH value measuring instrument has a siphon phenomenon, and the valve opening needs to be continuously adjusted, which increases the difficulty of neutralizing the wastewater. The acid and alkali regeneration efficiency is extremely low, which often restricts resin regeneration and seriously affects the stability of system operation.

[0006] Therefore, in order to solve the above technical problems, the present invention proposes a discharge device and method for automatic acid-base neutralization of wastewater from a high-temperature gas-cooled reactor. Summary of the invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art and provides a high temperature gas-cooled reactor wastewater discharge device and method.

[0008] In one aspect of the present invention, a high temperature gas-cooled reactor wastewater discharge device is provided, comprising: a wastewater discharge pipeline, a dosing amount calculation unit, and a dosing unit; wherein:

[0009] The first end of the wastewater discharge pipe is connected to the wastewater discharge port of the resin regeneration tower, the second end of the wastewater discharge pipe is connected to the wastewater neutralization tank, and the dosage calculation unit is arranged on the wastewater discharge pipe to obtain dosage information according to the wastewater flow rate and the first pH value in the wastewater discharge pipe;

[0010] The dosing unit is connected to the dosing amount calculation unit and the wastewater neutralization tank respectively to add a preset amount of medicine to the wastewater neutralization tank according to the dosing amount information so that the second pH value of the wastewater in the wastewater neutralization tank meets the discharge standard.

[0011] Optionally, the dosage calculation unit includes a flow meter, a first pH meter and a PLC control module, one end of the flow meter and the first pH meter are connected to the wastewater discharge pipeline, and the other end is connected to the PLC control module, and the other end of the PLC control module is also connected to the dosing unit; wherein,

[0012] The flow meter is used to detect the wastewater flow in the wastewater discharge pipe;

[0013] The first pH measuring instrument is used to detect a first pH value of the wastewater in the wastewater discharge pipe;

[0014] The PLC control module is used to calculate the dosage information according to the wastewater flow and the first pH value.

[0015] Optionally, the dosing unit includes a dosing metering device, an acid storage tank, and an alkali storage tank; wherein,

[0016] The dosing metering device is respectively connected to the acid storage tank, the alkali storage tank, the PLC control module, and the wastewater neutralization tank to add a preset amount of acid in the acid storage tank or a preset amount of alkali in the alkali storage tank to the wastewater neutralization tank according to the dosing amount information.

[0017] Optionally, a wastewater discharge circulation pipeline of the wastewater neutralization tank is provided with a wastewater suction component, a second pH measuring instrument, a wastewater measurement control component, a wastewater discharge control component and an anti-siphon control component; wherein,

[0018] The wastewater suction component and the wastewater measurement control component are used to pump the wastewater in the wastewater neutralization tank into the wastewater discharge circulation pipeline;

[0019] The second pH measuring instrument is used to measure the second pH value of the wastewater in the wastewater discharge circulation pipeline;

[0020] The anti-siphon control is used to remain in an open state when the wastewater is discharged from the wastewater neutralization tank;

[0021] The wastewater discharge control component is used to open when the second pH value meets the preset pH range to discharge the wastewater.

[0022] Optionally, the device also includes a first delay control unit, which is used to delay the start of a fan connected to the wastewater neutralization tank after the wastewater suction component is turned on, and delay the opening of the wastewater discharge control component so that the second pH value of the wastewater in the wastewater neutralization tank reaches a preset pH range.

[0023] Optionally, the device further comprises a second delay control unit for delaying the start of the dosing unit by 1.5 hours to 2.5 hours.

[0024] Optionally, a seal is provided at the second end of the wastewater discharge pipe.

[0025] Another aspect of the present invention provides a method for discharging wastewater from a high temperature gas-cooled reactor. According to the high temperature gas-cooled reactor wastewater discharging device described above, the method comprises:

[0026] The wastewater from the resin regeneration tower is discharged into the wastewater neutralization tank by using the wastewater discharge pipeline, and the flow rate and the first pH value of the wastewater in the wastewater discharge pipeline are detected by using the dosage calculation unit to obtain dosage information;

[0027] A dosing unit is used to add a preset amount of medicine to the wastewater neutralization tank according to the dosing amount information.

[0028] Optionally, after the wastewater flow rate and the first pH value in the wastewater discharge pipe are detected by the dosage calculation unit and the dosage information is obtained, the method further includes:

[0029] The dosing unit is started after a preset time period, and the dosing unit adds a preset amount of acid or alkali solution into the wastewater neutralization tank.

[0030] Optionally, the step of adding a preset amount of medicine to the wastewater neutralization tank according to the medicine dosage information by using a medicine adding unit further includes:

[0031] Detecting a second pH value of wastewater in a wastewater discharge circulation pipeline connected to the wastewater neutralization tank;

[0032] When the second pH value meets the preset pH range, the wastewater in the wastewater neutralization tank is discharged.

[0033] The present invention proposes a high-temperature gas-cooled reactor wastewater discharge device and method, which sets a wastewater discharge pipeline at the bottom of the resin regeneration tower and connects it to the wastewater neutralization tank to replace the drainage ditch. Conventional island plant and secondary circuit thermal dosing room will not produce acid mist, thus avoiding equipment corrosion and protecting personnel health. In addition, a dosing amount calculation unit is set in the wastewater discharge pipeline. The dosing amount calculation unit cooperates with the dosing unit to realize fully automatic adjustment of the dosing amount of the metering pump and automatic adjustment of the pH value, thereby solving the problem of being unable to accurately control the dosing amount and improving the neutralization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a high temperature gas-cooled reactor wastewater discharge device according to an embodiment of the present invention;

[0035] Figure 2 This is a flowchart of a method for discharging wastewater from a high-temperature gas-cooled reactor according to another embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0037] Unless otherwise specified, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The terms "including" or "comprising" used in the present invention neither limit the shapes, numbers, steps, actions, operations, components, originals and / or their groups mentioned, nor exclude the presence or addition of one or more other different shapes, numbers, steps, actions, operations, components, originals and / or their groups. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number and order of the indicated technical features.

[0038] In some descriptions of the invention, unless otherwise expressly specified and limited, the terms "install", "connect", "connected" or "fixed" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect through an intermediate medium, internal connections between two elements or mutual interaction between two elements. Also, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the drawings, are only used to indicate relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] like Figure 1 As shown, the present invention provides a high temperature gas-cooled reactor wastewater discharge device, comprising: a wastewater discharge pipeline 110, a dosing amount calculation unit 120, and a dosing unit 130; wherein the first end of the wastewater discharge pipeline 110 is connected to the wastewater discharge port of the resin regeneration tower 140, the second end of the wastewater discharge pipeline 110 is connected to the wastewater neutralization tank 150, and the dosing amount calculation unit 120 is arranged on the wastewater discharge pipeline 110 to obtain dosing amount information according to the wastewater flow rate in the wastewater discharge pipeline 110 and the first pH value of the wastewater. The dosing unit 130 is respectively connected to the dosing amount calculation unit 120 and the wastewater neutralization tank 150 to add a preset amount of medicine to the wastewater neutralization tank 150 according to the dosing amount information, so that the second pH value of the wastewater in the wastewater neutralization tank 150 reaches the discharge standard.

[0040] In this embodiment, a wastewater discharge pipeline is led out from the bottom of the resin regeneration tower and connected to the wastewater neutralization tank to replace the drainage ditch. Conventional island plants and secondary circuit thermal dosing rooms will not produce acid mist, thus avoiding equipment corrosion and protecting the health of personnel. In addition, a dosing amount calculation unit is set in the wastewater discharge pipeline. The dosing amount calculation unit cooperates with the dosing unit to achieve full automatic adjustment of the dosing amount of the metering pump and automatic adjustment of the pH value, thereby solving the problem of being unable to accurately control the dosing amount and improving the neutralization efficiency.

[0041] Furthermore, a seal is also provided at the second end of the wastewater discharge pipe of this embodiment, that is, a seal is performed at the entrance of the wastewater discharge pipe into the wastewater neutralization tank to further prevent the neutralized acid mist from returning to the factory building to pollute the environment, and all of it is intercepted inside the wastewater neutralization tank.

[0042] It should be noted that the present embodiment does not impose any specific limitation on the material of the wastewater discharge pipe. For example, a rubber-lined pipe may be used. Of course, pipes made of other materials may also be used according to actual needs.

[0043] Furthermore, if Figure 1 As shown, the dosage calculation unit 120 of this embodiment includes a flow meter 121, a first pH measuring instrument 122 and a PLC control module 123, one end of the flow meter 121 and the first pH measuring instrument 122 are connected to the wastewater discharge pipe 110, the other end of the flow meter 121 and the first pH measuring instrument 122 are connected to the PLC control module 123, and the other end of the PLC control module 123 is also connected to the dosing unit 130; wherein, the flow meter 121 is used to detect the wastewater flow in the wastewater discharge pipe 110, the first pH measuring instrument 122 is used to detect the first pH value of the wastewater in the wastewater discharge pipe 110; the PLC control module 123 is used to calculate the dosage information according to the wastewater flow and the first pH value of the wastewater.

[0044] This embodiment is equipped with a waste liquid parameter measuring instrument, which can obtain the waste water volume and pH signal through the flow meter and the first pH measuring instrument, accurately calculate the dosage, and improve the feasibility and stability of automatic operation. In addition, the neutralization dosage can be accurately calculated through the PLC control module, and the dosage signal can be fed back to the dosing metering device of the acid and alkali for neutralization. With the instrument, the dosage can be fully automatically controlled, the pH value can be automatically adjusted, and manpower input can be avoided to improve the neutralization efficiency.

[0045] Furthermore, if Figure 1 As shown, the dosing unit 130 includes a dosing metering device 131, an acid storage tank 132, and an alkali storage tank 133; wherein the dosing metering device 131 is respectively connected to the acid storage tank 132, the alkali storage tank 133, the PLC control module 123, and the wastewater neutralization tank 150, so as to add a preset amount of acid in the acid storage tank 132 or a preset amount of alkali in the alkali storage tank 133 to the wastewater neutralization tank 150 according to the dosing amount information to adjust the second pH value of the wastewater in the wastewater neutralization tank 150 to meet the discharge standard.

[0046] In this embodiment, a set of acid and alkali dosing metering devices for neutralization is added to the acid and alkali storage tank to accurately adjust the amount of neutralization acid and alkali added, thereby solving the problem that the valve adjustment cannot accurately control the amount of added.

[0047] It should be understood that in this embodiment, wastewater is introduced from the resin regeneration tower into the wastewater neutralization tank through a wastewater discharge pipe, and the wastewater is subjected to acid-base neutralization, and then the neutralized wastewater that meets the standards is discharged into a circulating water siphon well.

[0048] In order to avoid siphoning during the wastewater discharge process, an anti-siphon control component is further provided in the wastewater discharge circulation pipe in this embodiment.

[0049] Specifically, Figure 1As shown, the wastewater neutralization tank 150 is also provided with a wastewater discharge circulation pipeline 160 for discharging wastewater, and a wastewater suction member 161, a second pH measuring instrument 162, a wastewater measuring control member 163, a wastewater discharge control member 164 and an anti-siphon control member 165 are provided on the wastewater discharge circulation pipeline 160; wherein, the wastewater suction member 161 and the wastewater measuring control member 163 are used to extract the wastewater in the wastewater neutralization tank 150 into the wastewater discharge circulation pipeline 160; the second pH measuring instrument 162 is used to measure the second pH value of the wastewater in the wastewater discharge circulation pipeline 160; the anti-siphon control member 165 is used to keep the open state when discharging the wastewater from the wastewater neutralization tank 150; the wastewater discharge control member 164 is used to open when the second pH value meets the preset pH range to discharge the wastewater. That is to say, when the wastewater is discharged from the wastewater neutralization tank to the siphon well, the wastewater can be directed to the wastewater discharge circulation pipeline by opening the wastewater suction component and the wastewater measurement control component. At the same time, the anti-siphon control component remains in the open state to avoid the siphon phenomenon. Afterwards, the second pH value of the wastewater in the wastewater discharge circulation pipeline is detected by the second pH measuring instrument. When it meets the discharge standards, the wastewater discharge control component is opened to discharge the wastewater that meets the standards into the siphon well.

[0050] Furthermore, if Figure 1 As shown, the wastewater discharge circulation pipeline 160 of this embodiment includes a first sub-pipeline and a second sub-pipeline, the first sub-pipeline is provided with a wastewater suction component 161, a second pH measuring instrument 162, and a wastewater discharge control component 164, and the second sub-pipeline is provided with a wastewater measurement control component 163 and an anti-siphon control component 165. In addition, the first ends of the first sub-pipeline and the second sub-pipeline are both located in the wastewater neutralization tank 150, the second end of the second sub-pipeline is connected to the first sub-pipeline, and the second end is located between the second pH measuring instrument 162 and the wastewater discharge control component 164, and the second end of the first sub-pipeline is connected to the siphon well 170.

[0051] It should be noted that this embodiment does not specifically limit the wastewater suction component, wastewater measurement control component, wastewater discharge control component and anti-siphon control component. For example, the wastewater suction component can use a wastewater pump to suck the wastewater and lead it into the wastewater discharge circulation pipeline. The wastewater measurement control component and the wastewater discharge control component can both use electric valves to control the wastewater to enter the wastewater discharge circulation pipeline by opening the corresponding electric control valves respectively, so as to detect the pH value of the wastewater and control the wastewater to be discharged into the siphon well. In addition, the anti-siphon control component can use a manual valve, etc., to keep the valve in an open state to prevent siphoning.

[0052] In this embodiment, an anti-siphon control component is added to the wastewater discharge circulation pipe, and the appropriate opening is adjusted to avoid pipeline siphoning, ensure that the wastewater discharge pH value detector sample water is full, ensure the stability of the signal, and fully realize automatic control of the entire neutralization process.

[0053] Furthermore, if Figure 1 As shown, the device of this embodiment further includes a first delay control unit, which is used to delay starting the fan 180 connected to the wastewater neutralization tank after the wastewater suction part is turned on, and delay opening the wastewater discharge control part 164, so that the pH value of the wastewater in the wastewater neutralization tank 150 reaches a preset pH range. That is, in order to fully mix the wastewater in the wastewater neutralization tank with the added acid or alkali solution, before discharging the wastewater, it is also necessary to start the fan in the wastewater neutralization tank to stir and mix the wastewater and accelerate the neutralization process.

[0054] It should be noted that the fan in this embodiment may be an aeration fan.

[0055] Furthermore, the device of this embodiment further includes a second delay control unit for delaying the start of the dosing unit by 1.5 hours to 2.5 hours. That is, after the dosing amount information is calculated by the PLC control module, the signal is transmitted to the dosing unit with a delay.

[0056] It should be noted that the delay time of this embodiment can be set according to the single regeneration time, that is, the dosing process is matched with the wastewater generation process by setting the delay control unit.

[0057] The present invention can realize automatic control of the wastewater discharge process by setting the first delay control unit and the second delay control unit without manual intervention.

[0058] In another aspect of the present invention, a method for discharging wastewater from a high temperature gas-cooled reactor is provided. According to the high temperature gas-cooled reactor wastewater discharging device described above, the method S200 includes steps S210 to S220:

[0059] S210, using a wastewater discharge pipe to discharge the wastewater from the resin regeneration tower into a wastewater neutralization tank, and using a dosage calculation unit to detect the wastewater flow rate and the first pH value in the wastewater discharge pipe to obtain dosage information.

[0060] Specifically, combined with Figure 1 As shown, this embodiment is based on the device set up in the previous text. A flow meter 121 can be used to detect the wastewater flow in the wastewater discharge pipe 110, and a first pH measuring instrument 122 can detect the first pH value of the wastewater in the wastewater discharge pipe 110; a PLC control module 123 calculates the dosage information according to the wastewater flow and the first pH value.

[0061] S220, using a dosing unit to add a preset amount of medicine to the wastewater neutralization tank according to the dosing amount information, so that the second pH value of the wastewater in the wastewater neutralization tank reaches the discharge standard.

[0062] Please continue to refer to Figure 1 The dosing metering device 131 adds a preset amount of acid in the acid storage tank 132 or a preset amount of alkali in the alkali storage tank 133 to the wastewater neutralization tank 150 according to the dosing amount information obtained in step S210, so as to adjust the pH value of the wastewater in the wastewater neutralization tank 150 to meet the discharge standard.

[0063] Furthermore, after the present embodiment uses the dosage calculation unit to detect the wastewater flow and pH value in the wastewater discharge pipe and obtains the dosage information, it also includes: delaying the start of the dosage unit for a preset time period, and the dosage unit adds a preset amount of acid or alkali solution to the wastewater neutralization tank. That is, after step S210 is completed, the process can be delayed to enter step S220, and the specific delay time can be set according to the single regeneration time, and there is no specific limitation on this.

[0064] Furthermore, a dosing unit is used to add a preset amount of medicine to the wastewater neutralization tank according to the dosing amount information, and then it also includes: detecting the second pH value of the wastewater in the wastewater discharge circulation pipeline of the wastewater neutralization tank; when the second pH value is within the preset pH range, the wastewater in the wastewater neutralization tank is discharged to the siphon well.

[0065] Specifically, combined Figure 1 As shown, when the wastewater in the wastewater neutralization tank 150 is discharged to the siphon well 170, the wastewater suction component 161 and the wastewater measurement control component 163 are opened to guide the wastewater to the wastewater discharge circulation pipeline 160. At the same time, the anti-siphon control component 165 remains in the open state to avoid the siphon phenomenon. The second pH value of the wastewater in the wastewater discharge circulation pipeline 160 is measured by the second pH measuring instrument 162. When the second pH value meets the preset pH range, the wastewater discharge control component 164 is opened to discharge the wastewater to the siphon well 170.

[0066] In this embodiment, when the wastewater is discharged to the siphon well, the anti-siphon control component is turned on to ensure the smooth flow of wastewater, accurate measurement of pH value, and prevent the siphon effect.

[0067] The present invention can accurately control the dosage of the drug, realize automatic adjustment of the pH value of the wastewater, solve the problems of acid mist pollution in the acid-base wastewater discharged from the high-temperature gas-cooled reactor and the inability to realize automatic drug addition, improve the operating efficiency, avoid polluting the plant environment, and prevent the triggering of fire alarms.

[0068] The following will further illustrate the high temperature gas-cooled reactor wastewater discharge device and discharge method in conjunction with specific embodiments:

[0069] Example 1

[0070] like Figure 1 As shown, the structure of the high temperature gas-cooled reactor wastewater discharge device of this embodiment is as follows:

[0071] A wastewater discharge pipe 110 is provided at the bottom of the resin regeneration tower 140, so that a large amount of acid / alkali wastewater generated by the regeneration of the resin regeneration tower 140 can be discharged into the wastewater neutralization tank 150 through the wastewater discharge pipe 110, and a seal is added at the place where it enters the wastewater neutralization tank 150 to prevent the acid mist from being discharged into the interior of the factory. Secondly, a flow meter 121, a first pH measuring instrument 122 and a PLC control module 123 are added to the wastewater discharge pipe 110, and a dosing metering device 131 connected to the PLC control module 123 is also provided, as well as an acid storage tank 132 and an alkali storage tank 133 respectively connected to the dosing metering device 131. In addition, a wastewater suction part 161, a second pH measuring instrument 162, a wastewater measurement control part 163, a wastewater discharge control part 164 and an anti-siphon control part 165 are provided on the wastewater discharge circulation pipeline 160.

[0072] like Figure 1 and Figure 2 As shown, based on the above structure, this embodiment proposes an acid-base automatic neutralization and drainage method, and the specific process is as follows:

[0073] S1. The flow rate and pH value of the wastewater are detected by the flow meter 121 and the first pH meter 122. The neutralization dosage is calculated by the PLC control module 123. The signal is transmitted to the neutralization dosage metering device 131 after a delay of 2 hours (the delay time is set according to the single regeneration time) to accurately add the drug to the wastewater neutralization tank 150.

[0074] S2. Start the wastewater suction component 161 (wastewater pump), open the wastewater measurement control component 163 (electric valve), and adjust the anti-siphon control component 165 (manual diaphragm valve) according to the sampling tube condition of the second pH measuring instrument 162 at the outlet of the wastewater suction component 161 (wastewater pump) to ensure smooth sample water flow, determine the opening of the manual diaphragm valve, and ensure accurate pH value measurement.

[0075] S3, delay 5 minutes to start the fan 180 (aeration fan) to accelerate the neutralization until the second pH value of the wastewater reaches the range of 6 to 9, delay 5 minutes to open the wastewater discharge control component 164 (electric valve), close the wastewater measurement control component 163 (electric valve), and discharge the wastewater to the siphon dilution discharge, i.e., the siphon well 170, after the wastewater meets the standard. The whole process of acid-base neutralization and discharge of high-temperature gas-cooled reactor wastewater takes about 4 hours, which can greatly improve efficiency and save labor compared with the current 8 hours of manual processing time.

[0076] The present invention provides a high temperature gas-cooled reactor wastewater discharge device and method, which has the following beneficial effects compared with the prior art:

[0077] First, the present invention adds a wastewater discharge pipeline to replace the ditch discharge, and the conventional island plant and the secondary circuit thermal dosing room will not produce acid mist, thus avoiding equipment corrosion and protecting the health of personnel;

[0078] Second, the present invention is equipped with a waste liquid parameter measuring instrument, which can accurately calculate the dosage according to the water volume and pH signal, thereby improving the feasibility and stability of automatic operation;

[0079] Third, the present invention is additionally provided with a dosage calculation unit and a dosage metering device with a PLC control module, which can accurately control the dosage according to the dosage information, realize precise dosing, realize fully automatic control of the dosage, avoid manpower input, and improve the neutralization efficiency;

[0080] Fourth, the present invention adds an anti-siphon control component, optimizes the pipeline design, overcomes the siphon phenomenon, ensures continuous and reliable instrument sampling, improves the reliability of automated operation, and prevents parameter mis-triggering.

[0081] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A high temperature gas-cooled reactor wastewater discharge device, characterized in that: include: Wastewater discharge pipeline, dosing calculation unit, dosing unit; Among them, The first end of the wastewater discharge pipe is connected to the wastewater discharge port of the resin regeneration tower, the second end of the wastewater discharge pipe is connected to the wastewater neutralization tank, and the dosage calculation unit is arranged on the wastewater discharge pipe to obtain dosage information according to the wastewater flow rate and the first pH value in the wastewater discharge pipe; The dosing unit is connected to the dosing amount calculation unit and the wastewater neutralization tank respectively, so as to add a preset amount of medicine to the wastewater neutralization tank according to the dosing amount information, so that the second pH value of the wastewater in the wastewater neutralization tank meets the discharge standard; The wastewater discharge circulation pipeline of the wastewater neutralization tank includes a first sub-pipeline and a second sub-pipeline, wherein the first sub-pipeline is provided with a wastewater suction component, a second pH measuring instrument, and a wastewater discharge control component, and the second sub-pipeline is provided with a wastewater measurement control component and an anti-siphon control component; the first ends of the first sub-pipeline and the second sub-pipeline are both located in the wastewater neutralization tank, the second end of the second sub-pipeline is connected to the first sub-pipeline, and the second end is located between the second pH measuring instrument and the wastewater discharge control component, and the second end of the first sub-pipeline is connected to the siphon well; wherein, The wastewater suction component and the wastewater measurement control component are used to pump the wastewater in the wastewater neutralization tank into the wastewater discharge circulation pipeline; The second pH measuring instrument is used to measure the second pH value of the wastewater in the wastewater discharge circulation pipeline; The anti-siphon control is used to remain in an open state when the wastewater is discharged from the wastewater neutralization tank; The wastewater discharge control component is used to open when the second pH value meets the preset pH range to discharge the wastewater.

2. The device according to claim 1, characterized in that The dosage calculation unit includes a flow meter, a first pH meter and a PLC control module, one end of the flow meter and the first pH meter are connected to the wastewater discharge pipeline, and the other end is connected to the PLC control module, and the other end of the PLC control module is also connected to the dosing unit; wherein, The flow meter is used to detect the wastewater flow in the wastewater discharge pipe; The first pH measuring instrument is used to detect a first pH value of the wastewater in the wastewater discharge pipe; The PLC control module is used to calculate the dosage information according to the wastewater flow and the first pH value.

3. The device according to claim 2, characterized in that The dosing unit includes a dosing metering device, an acid storage tank, and an alkali storage tank; wherein, The dosing metering device is respectively connected to the acid storage tank, the alkali storage tank, the PLC control module, and the wastewater neutralization tank to add a preset amount of acid in the acid storage tank or a preset amount of alkali in the alkali storage tank to the wastewater neutralization tank according to the dosing amount information.

4. The device according to any one of claims 1 to 3, characterized in that The device also includes a first delay control unit, which is used to delay the start of a fan connected to the wastewater neutralization tank after the wastewater suction component is turned on, and delay the opening of the wastewater discharge control component so that the second pH value of the wastewater in the wastewater neutralization tank reaches a preset pH range.

5. The device according to any one of claims 1 to 3, characterized in that: The device also includes a second delay control unit, which is used to delay the start of the dosing unit by 1.5 hours to 2.5 hours.

6. The device according to any one of claims 1 to 3, characterized in that The second end of the wastewater discharge pipe is provided with a sealing member.

7. A method for discharging wastewater from a high temperature gas-cooled reactor, characterized in that: According to the high temperature gas-cooled reactor wastewater discharge device according to any one of claims 1 to 6, the method comprises: The wastewater from the resin regeneration tower is discharged into the wastewater neutralization tank by using the wastewater discharge pipeline, and the wastewater flow rate and the first pH value in the wastewater discharge pipeline are detected by using the dosage calculation unit to obtain dosage information; Using a dosing unit to add a preset amount of medicine to the wastewater neutralization tank according to the dosing amount information, so that the second pH value of the wastewater in the wastewater neutralization tank meets the discharge standard; The method further comprises: adding a preset amount of medicine to the wastewater neutralization tank by using a medicine adding unit according to the medicine adding amount information; Detecting a second pH value of wastewater in a wastewater discharge circulation pipeline connected to the wastewater neutralization tank; When the second pH value meets the preset pH range, the wastewater in the wastewater neutralization tank is discharged.

8. The method according to claim 7, characterized in that After the method uses the dosage calculation unit to detect the wastewater flow rate and the first pH value in the wastewater discharge pipe and obtains the dosage information, it also includes: The dosing unit is started after a preset time period, and the dosing unit adds a preset amount of acid or alkali solution into the wastewater neutralization tank.

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