Automatic decontamination device and method for steam generator

Abstract

The invention discloses an automatic decontamination device and method for a steam generator, and the device comprises a pressurization mechanism which is used for guaranteeing the sealing performance of the interior of the steam generator, a liquid discharge mechanism which is used for discharging the waste liquid after decontamination and cleaning out of the steam generator, and a spraying mechanism which is used for spraying a decontaminant to the inner surface of the steam generator. The spraying mechanism comprises a multi-path pesticide supply mechanism, a decontamination mechanical arm and a decontamination hose fixed to the decontamination mechanical arm, an outlet of the decontamination hose is connected to a spray head, the decontamination mechanical arm is composed of a mechanical arm fixed section, a rotary link, a mechanical arm movable section, a rotary connecting rod, the spray head and the decontamination hose, the mechanical arm movable section can rotate by 360 degrees, and the spray head is connected with the rotary connecting rod. By combining the mechanical arm with the space capable of rotating by 360 degrees and the spray head, the foam detergent is sprayed to the water chamber on the lower portion of the steam generator and other surfaces needing to be decontaminated, then clean water is used for flushing the foam detergent thoroughly, waste liquid is discharged into the waste liquid box for treatment, the method is simple, the decontamination effect is good, and the decontamination efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature acquisition and control, and in particular relates to an automatic decontamination device and method for a steam generator. Background Art

[0002] A steam generator, also known as a steam heat source machine or commonly known as a boiler, is a device that produces steam. It uses fuel or other energy to heat water into hot water or steam to meet the steam needs of many industries such as food, textiles, and industry. The core principle is to convert water into high-temperature and high-pressure steam by heating water. Its overall structure consists of two major parts: the boiler body and auxiliary equipment. Generally speaking, a steam generator contains a water tank, a heater, and a steam outlet. When the water in the water tank is heated to boiling point by the heater, the water begins to evaporate to form steam. As the heating process continues, steam is continuously generated and transported through the outlet to where it is needed.

[0003] During normal operation, the lower water chamber of the steam generator belongs to the primary circuit of the nuclear reactor, and the working medium is the primary circuit coolant. As the corrosion products in the primary circuit coolant of the reactor will be activated as the coolant flows through the core, it will carry radioactive nuclides with long half-lives such as Co-58, Co-60, Mn-54, and Fe-59. The coolant will transport the corrosion products to the primary side surface of the steam generator, forming a radiation source. Some of the radioactive substances may be gradually adsorbed in the lower water chamber of the steam generator due to corrosion deposition, ion exchange, etc., and accumulate to form a radioactive source or radiation hotspot.

[0004] The above-mentioned radiation sources have an adverse effect on steam generator equipment maintenance and other work. Radiation hot spots can lead to excessive local radiation doses, which not only increase the radiation dose of maintenance personnel, but also bring certain difficulties to the radiation control of nuclear power plants. According to statistics, the dose value contributed by steam generator maintenance work exceeds 40% of the total occupational radiation dose in nuclear power plants. To reduce the radiation exposure of steam generator maintenance personnel, it is necessary to reduce the content of corrosion products and radionuclides.

[0005] At present, mechanical decontamination, chemical decontamination and electrochemical decontamination are generally used to decontaminate the lower water chamber of the steam generator.

[0006] Mechanical decontamination has a low decontamination factor, a long decontamination time, and a poor decontamination effect. Chemical decontamination has a high decontamination factor, but requires a large amount of chemicals and produces the most waste liquid. Electrochemical decontamination has a better effect and less radioactive waste, but the equipment cost is high, the technology is immature, and the reliability of use has yet to be verified. Summary of the invention

[0007] The object of the present invention is to provide a steam generator automatic decontamination device and method to overcome the technical problems of poor decontamination effect, large amount of waste liquid and high cost in the lower water chamber of the existing steam generator.

[0008] To solve the above problems, the present invention adopts the following technical solutions: An automatic decontamination device for a steam generator comprises a spraying mechanism, a pressurizing mechanism and a liquid discharge mechanism, wherein one end of the spraying mechanism, the pressurizing mechanism and the liquid discharge mechanism are all arranged in the steam generator; The spraying mechanism comprises a decontamination mechanical arm, a decontamination hose is fixed on the decontamination mechanical arm, a nozzle is connected at the outlet of the decontamination hose, and a multi-channel medicine supply mechanism is connected at the inlet; The decontamination robot arm comprises a robot arm fixed section and a robot arm movable section, one end of the robot arm fixed section is rotatably connected to the robot arm movable section through a rotating link, and one end of the robot arm movable section is rotatably connected to a rotating connecting rod.

[0009] Furthermore, the spraying mechanism and the liquid discharge mechanism are both electrically connected to a control module.

[0010] Furthermore, the fixed section and the rotating link of the robot arm are coaxial.

[0011] Furthermore, the drug supply mechanism structures of each branch in the multi-channel drug supply mechanism are the same, and the drug supply mechanism includes a detergent dispensing box, and the lower side wall of the detergent dispensing box is connected to the inlet end of the detergent booster pump, and the outlet end of the detergent booster pump is connected to the inlet end of the decontamination hose.

[0012] Furthermore, the drug supply mechanism has two routes, using a one-main-one-backup drug supply method.

[0013] Furthermore, an electric heater is provided on the body of the detergent dispensing box.

[0014] Furthermore, the pressurizing mechanism includes a water supply device, a pressurizing device, a pressurizing hose and a sealing ball connected in sequence, the water supply device and the pressurizing device are arranged outside the steam generator, the pressurizing hose is arranged inside the pressurizing hose, and the sealing ball is arranged at the nozzle of the steam generator.

[0015] Furthermore, the drainage mechanism includes a drainage pipe, a drainage pump and a waste liquid tank which are connected in sequence, the drainage pump and the waste liquid tank are arranged outside the steam generator, and the drainage pipe is arranged inside the steam generator.

[0016] In a second aspect, a method for automatically decontaminating a steam generator is provided, comprising the following steps: Using a pressurizing mechanism to seal the interior of the steam generator; The drug supply mechanism outputs the decontamination agent to the decontamination hose, and the decontamination hose is fixed along the fixed section of the mechanical arm, the rotating link, the movable section of the mechanical arm and the rotating connecting rod on the decontamination mechanical arm of the machine. The nozzle at the outlet end of the decontamination hose is driven by the decontamination mechanical arm to achieve 360° spraying; Using a spraying mechanism to clean the inner surface of the steam generator; The waste liquid is discharged through the drainage mechanism.

[0017] Furthermore, before the pressurizing mechanism is used to seal the interior of the steam generator, the water inside the steam generator is first drained.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides an automatic decontamination device for a steam generator, comprising a pressurizing mechanism for sealing the interior of a steam generator, a liquid discharge mechanism for discharging waste liquid after decontamination and cleaning from the steam generator, and a spraying mechanism for spraying a decontaminant onto the inner surface of the steam generator, wherein the spraying mechanism comprises a multi-channel drug supply mechanism, a decontamination mechanical arm, and a decontamination hose fixed on the decontamination mechanical arm, the outlet of the decontamination hose is connected to a spray head, the decontamination mechanical arm is composed of a mechanical arm fixed section, a rotating link, a mechanical arm movable section, a rotating connecting rod, a spray head, and a decontamination hose, the mechanical arm fixed section is connected to the mechanical arm movable section through a rotating link, the mechanical arm fixed section and the rotating link are coaxial, and the mechanical arm movable section can rotate 360 ​​degrees. The rotating connecting rod is installed at the top of the mechanical arm movable section and has a 360-degree rotation capability. Compared with the existing steam generator decontamination method, the present invention has a simple structure, better decontamination effect, lower cost, and can achieve a more comprehensive and thorough decontamination work by driving the decontamination hose through the mechanical arm.

[0019] Preferably, the spraying mechanism and the discharge mechanism are both electrically connected to the control module, and work by issuing control instructions through the control module, thereby ensuring accuracy, reducing labor costs, and having high automation efficiency. The precise spraying of the detergent can be achieved, making the spraying of the liquid medicine more uniform and generating less waste liquid.

[0020] Preferably, the drug supply mechanism includes a detergent dispensing box, and an electric heater is provided at the box body of the detergent dispensing box, and the detergent in the box body is heated by the electric heater to keep the detergent within the temperature range required for the strongest decontamination ability.

[0021] Preferably, the drug supply mechanism has two routes, using a one-main-one-backup drug supply method to improve the redundancy effect and reliability of the device.

[0022] Preferably, the sealing property of the inner cavity of the steam generator is ensured by installing a sealing ball at one end of the pressurizing mechanism at the nozzle of the steam generator and applying pressure.

[0023] Preferably, the drain pipe of the drain mechanism is arranged at the bottom of the inner cavity of the steam generator, so that the generated waste liquid can be completely discharged after the decontamination work is completed.

[0024] The present invention provides a method for automatic decontamination of a steam generator. First, a pressurizing mechanism is used to ensure the sealing inside the steam generator. Secondly, a mechanical arm is used to drive a nozzle at the outlet end of a decontamination hose connected to a medicine supply mechanism to spray 360 degrees. After cleaning, the waste liquid is finally discharged through a drainage mechanism. The present invention sprays a foam detergent onto surfaces that need to be decontaminated, such as a water chamber at the bottom of a steam generator, by combining a mechanical arm and a nozzle that can rotate 360 ​​degrees in space. The foam detergent adheres to the surface of the equipment that needs to be decontaminated. After a certain period of reaction, the foam detergent is rinsed with clean water. The waste liquid is discharged to a waste liquid tank for treatment. The method is simple and has a good decontamination effect. The method combines mechanical and chemical methods and uses an absorbent foam detergent. Compared with conventional chemical decontamination, the method has a lower amount of radioactive waste liquid, a shorter required construction period, and improved decontamination efficiency.

[0025] Preferably, before the pressurization work is carried out, the water in the inner cavity of the steam generator is discharged first to prevent uneven pressure, improve the pressurization efficiency, and at the same time avoid the corrosion of the steam generator by the water in the high-pressure state.

[0026] Preferably, by connecting the spray mechanism and the liquid discharge mechanism through the control module, remote automatic control can be achieved, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of an automatic decontamination device for a steam generator according to an embodiment of the present invention; Figure 2 The present invention is a flow chart of a method for automatically decontaminating a steam generator according to an embodiment of the present invention.

[0028] Among them, 1-1, detergent dispensing box; 1-2, electric heater; 2, detergent booster pump; 3, decontamination robot arm; 3-1, robot arm fixed section; 3-2, rotating link; 3-3, robot arm movable section; 3-4, rotating connecting rod; 3-5, nozzle; 3-6, decontamination hose; 4, steam generator tube sheet; 5, steam generator lower head; 6, steam generator nozzle; 7, steam generator lower head inspection hole; 8, water supply equipment; 9, pressurizing equipment; 10, pressurizing hose; 11, seal; 12, drain pipe; 13, drain pump; 14, waste liquid tank; 15, control module. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] An automatic decontamination device for a steam generator, such as Figure 1 As shown, it includes a spraying mechanism, a pressurizing mechanism and a draining mechanism, one end of which is arranged in the inner cavity of the steam generator, wherein the pressurizing mechanism is used to seal the inside of the steam generator, and the spraying mechanism is used to spray a decontaminant onto the inner surface of the steam generator to clean the corrosion products and radioactive nuclides on the inner surface of the steam generator. After cleaning, it is cleaned by the spraying mechanism, and finally the waste liquid is discharged by the draining mechanism. The spraying mechanism can rotate 360° to spray, so that the decontamination of the device is more comprehensive and thorough.

[0035] The spraying mechanism includes a decontamination robot arm 3 and a decontamination hose 3-6 fixed on the decontamination robot arm 3, one end of the decontamination hose 3-6 is connected to the multi-channel medicine supply mechanism, and the other end is installed with a nozzle 3-5; wherein the decontamination robot arm 3 includes a robot arm fixed section 3-1, a rotating link 3-2, a robot arm movable section 3-3 and a rotating connecting rod 3-4, the robot arm fixed section 3-1 is installed at the opening of the lower water chamber of the steam generator, and one end of the robot arm fixed section 3-1 is located in the lower water chamber of the steam generator. In the figure, the end is connected to one end of the movable section 3-3 of the robot arm through a rotating link 3-2, and the other end of the movable section 3-3 of the robot arm is connected to the rotating link 3-4. One end of the decontamination hose 3-6 equipped with a nozzle 3-5 is flush with the end of the rotating link 3-4, wherein the rotating link 3-4 is fixedly connected to the movable section 3-3 of the robot arm, and the movable section 3-3 of the robot arm can rotate 360°, thereby driving the rotating link 3-4 and the decontamination hose 3-6 to rotate, thereby completing the spraying of the decontamination agent.

[0036] In an optional implementation, both the spraying mechanism and the draining mechanism are connected to the control module 15 , and the cleaning process of the inner surface of the steam generator is completed through the control of the control module 15 .

[0037] In this embodiment, a steam generator automatic decontamination device is provided, including a spraying mechanism, a pressurizing mechanism and a draining mechanism, one end of each of the spraying mechanism, the pressurizing mechanism and the draining mechanism is arranged in the steam generator, the spraying mechanism includes a decontamination robot arm 3 and a decontamination hose 3-6 fixed to the decontamination robot arm 3, one end of the decontamination hose 3-6 is connected to the multi-channel medicine supply mechanism, and the other end is installed with a nozzle 3-5; wherein the decontamination robot arm 3 includes a robot arm fixed section 3-1, a rotating link 3-2, a robot arm movable section 3-3 and a rotating connecting rod 3- 4. The fixed section 3-1 of the robot arm is installed at the opening of the lower water chamber of the steam generator. One end of the fixed section 3-1 of the robot arm is located in the lower water chamber of the steam generator. The end is connected to one end of the movable section 3-3 of the robot arm through a rotating link 3-2. The other end of the movable section 3-3 of the robot arm is connected to the rotating connecting rod 3-4. One end of the decontamination hose 3-6 equipped with a nozzle 3-5 is flush with the end of the rotating connecting rod 3-4. The rotating connecting rod 3-4 is fixedly connected to the movable section 3-3 of the robot arm, and the movable section 3-3 of the robot arm can rotate 360°.

[0038] Optionally, the fixed section 3-1 and the rotating link 3-2 of the robot arm are coaxial; The drug supply mechanism structures of each branch in the multi-channel drug supply mechanism are the same. The drug supply mechanism has two channels in total, and adopts a main and a backup drug supply mode. The drug supply mechanism includes a detergent dispensing box 1-1, and the lower side wall of the detergent dispensing box 1-1 is connected to the inlet end of the detergent booster pump 2, and the outlet end of the detergent booster pump 2 is connected to the decontamination hose 3-6; In order to ensure the temperature requirement of the detergent in the detergent dispensing box 1-1, an electric heater 1-2 is arranged at the box body of the detergent dispensing box 1-1; Specifically, the electric heater 1-2 and the detergent booster pump 2 are both connected to the control module 15, and the control module 15 controls the electric heater 1-2 to heat the detergent in the detergent dispensing box (1-1), and controls the detergent booster pump 2 to complete the detergent delivery work.

[0039] In this embodiment, a steam generator automatic decontamination device is provided, including a spraying mechanism, a pressurizing mechanism and a draining mechanism, one end of each of the spraying mechanism, the pressurizing mechanism and the draining mechanism is arranged in the steam generator, the spraying mechanism includes a decontamination robot arm 3 and a decontamination hose 3-6 fixed to the decontamination robot arm 3, one end of the decontamination hose 3-6 is connected to the multi-channel medicine supply mechanism, and the other end is installed with a nozzle 3-5; wherein the decontamination robot arm 3 includes a robot arm fixed section 3-1, a rotating link 3-2, a robot arm movable section 3-3 and a rotating connecting rod 3- 4. The fixed section 3-1 of the robot arm is installed at the opening of the lower water chamber of the steam generator. One end of the fixed section 3-1 of the robot arm is located in the lower water chamber of the steam generator. The end is connected to one end of the movable section 3-3 of the robot arm through a rotating link 3-2. The other end of the movable section 3-3 of the robot arm is connected to the rotating connecting rod 3-4. One end of the decontamination hose 3-6 equipped with a nozzle 3-5 is flush with the end of the rotating connecting rod 3-4. The rotating connecting rod 3-4 is fixedly connected to the movable section 3-3 of the robot arm, and the movable section 3-3 of the robot arm can rotate 360°.

[0040] Among them, the pressurizing mechanism includes a water supply device 8, a pressurizing device 9 and a pressurizing hose 10. The water supply device 8, the pressurizing device 9 and the pressurizing hose 10 are connected in sequence, and a sealing ball 11 is connected to one end of the pressurizing hose 10. The water supply device 8 and the pressurizing device 9 are located outside the steam generator, and the pressurizing hose 10 and the sealing ball 11 are located in the inner cavity of the steam generator. A steam generator nozzle 6 is opened on the steam generator, and the sealing ball 11 is located at the steam generator nozzle 6. The inner cavity of the steam generator is pressurized by the water supply device 8 and the pressure supply device 9 to ensure that the sealing ball 11 is inserted into the steam generator nozzle 6 to complete the sealing of the inner cavity of the steam generator.

[0041] In this embodiment, a steam generator automatic decontamination device is provided, including a spraying mechanism, a pressurizing mechanism and a draining mechanism, one end of each of the spraying mechanism, the pressurizing mechanism and the draining mechanism is arranged in the steam generator, the spraying mechanism includes a decontamination robot arm 3 and a decontamination hose 3-6 fixed to the decontamination robot arm 3, one end of the decontamination hose 3-6 is connected to the multi-channel medicine supply mechanism, and the other end is installed with a nozzle 3-5; wherein the decontamination robot arm 3 includes a robot arm fixed section 3-1, a rotating link 3-2, a robot arm movable section 3-3 and a rotating connecting rod 3- 4. The fixed section 3-1 of the robot arm is installed at the opening of the lower water chamber of the steam generator. One end of the fixed section 3-1 of the robot arm is located in the lower water chamber of the steam generator. The end is connected to one end of the movable section 3-3 of the robot arm through a rotating link 3-2. The other end of the movable section 3-3 of the robot arm is connected to the rotating connecting rod 3-4. One end of the decontamination hose 3-6 equipped with a nozzle 3-5 is flush with the end of the rotating connecting rod 3-4. The rotating connecting rod 3-4 is fixedly connected to the movable section 3-3 of the robot arm, and the movable section 3-3 of the robot arm can rotate 360°.

[0042] The drainage mechanism includes a waste liquid tank 14, a drainage pump 13 and a drainage pipe 12 connected in sequence, wherein the waste liquid tank 14 and the drainage pump 13 are located outside the steam generator, and one end of the drainage pipe 13 is located in the inner cavity of the steam generator. In particular, the drainage pipe 13 is ensured to be at the bottom of the inner cavity of the steam generator so that the waste water can be completely discharged.

[0043] The drain pump 13 is also connected to the control module 15 , and the control module 15 controls the operation of the drain pump 13 to discharge the waste liquid after cleaning.

[0044] In another embodiment of the present invention, there is provided a steam generator automatic decontamination device comprising: a detergent dispensing box 1-1, an electric heater 1-2, a detergent booster pump 2, a decontamination robot arm 3, a robot arm fixed section 3-1, a rotating link 3-2, a robot arm movable section 3-3, a rotating connecting rod 3-4, a nozzle 3-5, a decontamination hose 3-6, a steam generator tube sheet 4, a steam generator lower head 5, a steam generator nozzle 6, a steam generator lower head inspection hole 7, a water supply device 8, a pressurizing device 9, a pressurizing hose 10, a sealing ball 11, a drain pipe 12, a drain pump 13, a waste liquid tank 14, and a control module 15.

[0045] The detergent dispensing box 1-1, the electric heater 1-2, and the detergent booster pump 2 are connected in two parallel rows, one for use and one for standby. The outlets of the two detergent booster pumps 2 are connected to the decontamination hose 3-6 through pipelines.

[0046] The decontamination robot arm 3 is composed of a robot arm fixed section 3-1, a rotating link 3-2, a robot arm movable section 3-3, a rotating connecting rod 3-4, a nozzle 3-5, and a decontamination hose 3-6, wherein the outlet of the decontamination hose 3-6 is connected to the nozzle 3-5.

[0047] The fixed section 3-1 of the robot arm is connected to the movable section 3-3 of the robot arm through the rotating link 3-2. The fixed section 3-1 of the robot arm and the rotating link 3-2 are coaxial, and the movable section 3-3 of the robot arm can rotate 360 ​​degrees. The rotating link 3-4 is installed at the top of the movable section 3-3 of the robot arm and has the ability to rotate 360 ​​degrees.

[0048] The fixed section 3-1 of the robot arm is installed in the inspection hole 7 of the lower head of the steam generator, and the rotating link 3-2, the movable section 3-3 of the robot arm, the rotating connecting rod 3-4, the nozzle 3-5, and the decontamination hose 3-6 are all located in the chamber formed by the steam generator tube sheet 4 and the lower head 5 of the steam generator.

[0049] The water supply device 8 and the pressure device 9 are located outside the lower head 5 of the steam generator, and the water supply device 8, the pressure device 9, the pressure hose 10, and the sealing ball 11 are connected in sequence. The sealing ball 11 is installed inside the steam generator nozzle 6 to play a sealing role.

[0050] The inlet of the drain pipe 12 is located at the bottom of the lower head 5 of the steam generator, and the outlet is connected to the waste liquid tank 14 through a drain pump 13 .

[0051] The control module 15 can remotely control the electric heater 1 - 2 , the detergent booster pump 2 , the rotating link 3 - 2 , the robot arm movable section 3 - 3 , the rotating connecting rod 3 - 4 , and the drainage pump 13 .

[0052] The present invention also provides a steam generator automatic decontamination method, such as Figure 2 As shown, the following steps are included: Using a pressurizing mechanism to seal the interior of the steam generator; The medicine supply mechanism outputs the decontamination agent to the decontamination hose 3-6, and the decontamination hose 3-6 is fixed along the mechanical arm fixed section 3-1, the rotating link 3-2, the mechanical arm movable section 3-3 and the rotating connecting rod 3-4 on the decontamination mechanical arm 3, and the decontamination mechanical arm 3 drives the nozzle 3-5 at the outlet end of the decontamination hose 3-6 to realize 360° spraying; Using a spraying mechanism to clean the inner surface of the steam generator; Discharge the waste liquid through the drainage mechanism; Before the decontamination work is performed, the water inside the steam generator is first drained, and then the inside of the steam generator is sealed by using a pressurizing mechanism, and the sealing ball 11 is installed inside the steam generator nozzle 6 to achieve a sealing effect.

[0053] The detailed decontamination method steps based on the device of the present invention are as follows: (1) After the nuclear power unit is shut down and the water inside the steam generator lower head 5 is drained, the inspection hole 7 of the steam generator lower head is opened.

[0054] (2) The sealing ball 11 is installed inside the steam generator nozzle 6, and the sealing ball 11 is pressurized to the rated pressure using the water supply device 8 and the pressurizing device 9 to achieve the sealing effect.

[0055] (3) Prepare the foam detergent in the detergent dispensing box 1-1 and maintain it within the required temperature range using the electric heater 1-2.

[0056] (4) Start a detergent booster pump 2, and use the control module 15 to automatically or manually operate the decontamination robot arm 3 (robot arm movable section 3-3, rotating connecting rod 3-4) to spray the foam detergent onto the inner surface of the lower head 5 of the steam generator.

[0057] (5) After the foam detergent is sprayed and a certain period of time has passed, the detergent booster pump 2 is used to spray clean water onto the inner surface of the lower head 5 of the steam generator until the foam is cleaned.

[0058] (6) The waste liquid generated in step (5) is pumped out by the drainage pump 13 and discharged into the waste liquid tank 14.

[0059] (7) Repeat steps (3) to (6) according to actual needs. (8) After the decontamination is completed, remove the decontamination robot arm 3, the pressure hose 10, the sealing ball 11, and the drain pipe 12. Close the inspection hole 7 of the lower head of the steam generator.

[0060] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A steam generator automatic decontamination device, characterized in that: It comprises a spraying mechanism, a pressurizing mechanism and a liquid discharging mechanism, wherein one end of the spraying mechanism, the pressurizing mechanism and the liquid discharging mechanism are all arranged in a steam generator; The spraying mechanism comprises a decontamination mechanical arm (3), a decontamination hose (3-6) is fixed on the decontamination mechanical arm (3), the outlet of the decontamination hose (3-6) is connected to a spray head (3-5), and the inlet is connected to a multi-channel medicine supply mechanism; The decontamination robot arm (3) comprises a robot arm fixed section (3-1) and a robot arm movable section (3-3); one end of the robot arm fixed section (3-1) is rotatably connected to the robot arm movable section (3-3) via a swivel link (3-2); one end of the robot arm movable section (3-3) is rotatably connected to a swivel link (3-4).

2. The automatic decontamination device for a steam generator according to claim 1, characterized in that: The spraying mechanism and the liquid discharge mechanism are both electrically connected to a control module (15).

3. The automatic decontamination device for a steam generator according to claim 1, characterized in that: The mechanical arm fixed section (3-1) and the rotating link (3-2) are coaxial.

4. The automatic decontamination device for a steam generator according to claim 1, characterized in that: The drug supply mechanism structures of each branch of the multi-channel drug supply mechanism are the same, and the drug supply mechanism comprises a detergent dispensing box (1-1), the lower side wall of the detergent dispensing box (1-1) is connected to the inlet end of a detergent booster pump (2), and the outlet end of the detergent booster pump (2) is connected to the inlet end of a decontamination hose (3-6).

5. The automatic decontamination device for a steam generator according to claim 1 or 4, characterized in that: The medicine supply mechanism has two routes, which adopt a one-main-one-backup medicine supply method.

6. The automatic decontamination device for a steam generator according to claim 4, characterized in that: The detergent dispensing box (1-1) is provided with an electric heater (1-2) on its box body.

7. The automatic decontamination device for a steam generator according to claim 1, characterized in that: The pressurizing mechanism comprises a water supply device (8), a pressurizing device (9), a pressurizing hose (10) and a sealing ball (11) which are connected in sequence; the water supply device (8) and the pressurizing device (9) are arranged outside the steam generator, the pressurizing hose (10) is arranged inside the pressurizing hose (10), and the sealing ball (11) is arranged at the nozzle (6) of the steam generator.

8. The automatic decontamination device for a steam generator according to claim 1, characterized in that: The drainage mechanism comprises a drainage pipe (12), a drainage pump (13) and a waste liquid tank (14) which are connected in sequence; the drainage pump (13) and the waste liquid tank (14) are arranged outside the steam generator, and the drainage pipe (12) is arranged inside the steam generator.

9. A method for automatically decontaminating a steam generator, characterized in that: The automatic decontamination device for a steam generator according to any one of claims 1 to 8 comprises the following steps: Using a pressurizing mechanism to seal the interior of the steam generator; The drug supply mechanism outputs the decontamination agent to the decontamination hose (3-6), and the decontamination hose (3-6) is fixed along the mechanical arm fixed section (3-1), the rotating link (3-2), the mechanical arm movable section (3-3) and the rotating connecting rod (3-4) on the decontamination mechanical arm (3), and the decontamination mechanical arm (3) drives the nozzle (3-5) at the outlet end of the decontamination hose (3-6) to achieve 360-degree spraying; Using a spraying mechanism to clean the inner surface of the steam generator; The waste liquid is discharged through the drainage mechanism.

10. The method for automatic decontamination of a steam generator according to claim 9, characterized in that: Before the pressurizing mechanism is used to seal the interior of the steam generator, the water inside the steam generator is firstly drained.

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