Pest transfer equipment and method

Abstract

The present invention provides a harmful substance transfer device and a harmful substance transfer method, the device includes: a closed transfer container, the inner wall of which is coated with a polytetrafluoroethylene layer, or is made of polytetrafluoroethylene; a liquid extraction pipeline, which is respectively connected to the transfer container and the recovery container, and a liquid extraction pump is arranged on the liquid extraction pipeline, which is used to extract the liquid of the harmful substance in the recovery container to the transfer container; a first on-off valve is also arranged on the liquid extraction pipeline; a water supply device, which is connected to the transfer container, is used to inject water into the transfer container and recover the water in the transfer container; a gas supply device, which is connected to the transfer container, is used to provide inert gas to the transfer container; and an exhaust pipeline, which is connected to the transfer container, is used to discharge the gas in the transfer container, and a second on-off valve is arranged on the exhaust pipeline. The harmful substance transfer device provided by the present invention is used to realize the safe transfer of harmful substances, and can effectively reduce the risks of environmental pollution accidents, fire accidents, and hazards to the occupational health of workers.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection equipment, and in particular to a harmful substance transfer device and a harmful substance transfer method. Background Art

[0002] In the process of handling the remains of hazardous chemicals in abandoned factories, it is often necessary to transfer the remains of hazardous chemicals. Some of these hazardous chemicals may cause environmental pollution, some may cause poisoning, and some are flammable and explosive, which may cause fires and endanger lives. For example, yellow phosphorus will catch fire when exposed to humid air at a temperature of about 40°C, and it is easy to spontaneously combust, which is very likely to cause fires. Yellow phosphorus can cause poisoning or even death when inhaled by the human body. At the same time, yellow phosphorus can also pollute the atmosphere. This brings challenges to the transfer and disposal of harmful substances such as yellow phosphorus.

[0003] Taking yellow phosphorus as an example, the existing transfer and disposal method is to store yellow phosphorus in a plastic bucket, which is sealed by water and placed in a wasteland away from the crowd. However, the plastic buckets with yellow phosphorus stored for a long time are worn out and aged and are easily damaged. At this time, it is necessary to transport yellow phosphorus. The specific method is that the staff wears protective clothing, quickly pulls yellow phosphorus out of the water, and quickly transfers it to a new plastic bucket sealed with water, and transports it. However, in this process, the staff has a short contact with yellow phosphorus, and yellow phosphorus also has a short contact with the external environment. Even if the time is short, there is still a certain risk. Moreover, once the staff's protective measures are not in place, environmental pollution accidents are very likely to occur, endangering the occupational health of workers, and fire accidents may also occur simultaneously. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art, and proposes a harmful substance transfer device and a harmful substance transfer method, which are used to achieve the safe transfer of harmful substances and can effectively reduce the risks of environmental pollution accidents, fire accidents, and hazards to workers' occupational health.

[0005] To achieve the above object, the present invention provides a harmful substance transfer device, wherein the harmful substances are contained in a recovery container, comprising:

[0006] A closed transfer container, the inner wall of which is coated with a polytetrafluoroethylene layer, or the transfer container is made of polytetrafluoroethylene;

[0007] A liquid extraction pipeline is connected to the transfer container and the recovery container respectively, and a liquid extraction pump is arranged on the liquid extraction pipeline to extract the liquid of the harmful substance in the recovery container to the transfer container; and a first on-off valve is also arranged on the liquid extraction pipeline;

[0008] a water supply device connected to the transfer container and used to inject water into the transfer container and recover the water in the transfer container;

[0009] a gas supply device, connected to the transfer container, for providing an inert gas to the transfer container; and

[0010] An exhaust pipeline is connected to the transfer container and is used to exhaust the gas in the transfer container. A second on-off valve is arranged on the exhaust pipeline.

[0011] Optionally, the water supply device includes:

[0012] Water tank;

[0013] a water inlet pipeline, connected to the water tank and the transfer container respectively, and provided with a water pump on the water inlet pipeline for pumping water in the water tank into the transfer container; and a third on-off valve is provided on the water inlet pipeline;

[0014] A water return pipeline is respectively connected to the water tank and the transfer container and is used for recovering water in the transfer container. A fourth on-off valve is arranged on the water return pipeline.

[0015] Optionally, the air supply device comprises:

[0016] A gas source, used for providing the inert gas;

[0017] The gas supply pipeline is connected to the gas source and the transfer container respectively, and transports the inert gas from the gas source to the transfer container, and a fifth on-off valve is arranged on the gas supply pipeline.

[0018] Optionally, the gas source includes a gas storage bottle;

[0019] The gas supply pipeline is also provided with a gas supply pump for pumping the inert gas in the gas storage bottle into the transfer container.

[0020] Optionally, the liquid extraction pipeline and the transfer container, the water supply device and the transfer container, the air supply device and the transfer container, and the exhaust pipeline and the transfer container are all connected via quick connectors.

[0021] Optionally, the harmful substance transfer equipment further includes a heating device for heating the liquid in the recovery container to dissolve the solid harmful substance into liquid.

[0022] Optionally, the heating device includes a heating pipeline and a heat exchanger, wherein:

[0023] The heating pipeline is immersed in the liquid in the recovery container, and the water inlet and water return ends of the heating pipeline are respectively connected to the water outlet and water inlet of the heat exchanger;

[0024] The heat exchanger is used to heat the water in the heating pipeline.

[0025] Optionally, the harmful substance transfer device further includes a temperature sensor for detecting the temperature of the liquid in the recovery container.

[0026] Optionally, the harmful substance transfer equipment further includes a liquid level sensor for detecting the liquid level of the transfer container.

[0027] Optionally, the harmful substance transfer equipment also includes an alarm device.

[0028] Optionally, the harmful substance transfer device further includes a control system, and the control system includes:

[0029] A liquid pump contactor, a first relay for controlling the on-off of the liquid pump contactor and the first on-off valve, and a first switch for controlling the on-off of the circuit where the liquid pump contactor is located;

[0030] A water pump contactor, a second relay for controlling the on / off of the water pump contactor and the third on / off valve, and a second switch for controlling the on / off of the circuit where the water pump contactor is located;

[0031] A heating contactor, a third relay for controlling the on and off of the heating contactor, and a third switch for controlling the on and off of the circuit where the heating contactor is located;

[0032] An air supply pump contactor, a fourth relay for controlling the on-off of the air supply pump contactor and the fifth on-off valve, and a fourth switch for controlling the on-off of the circuit where the air supply pump contactor is located;

[0033] a fifth relay for controlling the on and off of the second on-off valve;

[0034] a sixth relay for controlling the on and off of the fourth on-off valve;

[0035] a seventh relay for controlling the on and off of the alarm device;

[0036] an eighth relay for controlling the on and off of the sixth on-off valve;

[0037] A main contactor and a main switch for controlling the on and off of the circuit where the main contactor is located;

[0038] A programmable controller, used to control the actions of the first to eighth relays and receive status feedback signals from each contactor;

[0039] A first control module, used for receiving feedback signals from the temperature sensor and the liquid level sensor respectively, and sending the feedback signals to the programmable controller;

[0040] A display device, used for displaying under the control of the programmable controller;

[0041] An input device, used to receive instruction information input by a user and send it to the programmable controller;

[0042] A DC power supply is used to supply power to the circuits where each component is located;

[0043] a fifth switch, used to control the on and off of the DC power supply; and

[0044] The power on button and the power off button are used to control the connection and disconnection of the main contactor respectively.

[0045] Optionally, the harmful substance transfer device further includes:

[0046] The housing has a grounding member and a circuit static electricity guide device; the transfer container, the water supply device, the air supply device and the exhaust pipeline are all arranged in the housing;

[0047] The display device is arranged on the outer wall of the housing.

[0048] Optionally, the harmful substance transfer device further includes an embedded touch screen that serves as both the display device and the input device.

[0049] Optionally, a roller capable of moving the shell is also provided at the bottom of the shell.

[0050] As another technical solution, the present invention further provides a method for transferring harmful substances, which uses the harmful substance transfer device provided by the present invention to transfer the harmful substances, comprising the following steps:

[0051] S1, after the transfer container is filled with water, it is connected to the liquid extraction pipeline, the water supply device, the air supply device and the exhaust pipeline;

[0052] S2, turning on the gas supply device to provide inert gas to the transfer container, and turning on the water supply device to recover water in the transfer container;

[0053] S3, after the water in the transfer container is drained, closing the air supply device and the water supply device;

[0054] S4, opening the first on-off valve and the liquid pump to pump the liquid of the harmful substance in the recovery container into the transfer container, and at the same time opening the second on-off valve to discharge the gas in the transfer container;

[0055] S5, when the liquid level in the transfer container reaches a preset liquid level or there is no untransferred harmful substance in the recovery container, closing the first on-off valve, the liquid pump and the second on-off valve.

[0056] Optionally, after step S3 and before step S4, the method further includes:

[0057] The liquid in the recovery container is heated until the solid harmful substances are dissolved into liquid.

[0058] Optionally, after step S5, the method further includes:

[0059] If the liquid level in the transfer container reaches the preset liquid level and there are untransferred harmful substances in the recovery container, replace the transfer container with a new one and return to step S1;

[0060] If the liquid level in the transfer container does not reach the preset liquid level and there is no untransferred harmful matter in the recovery container, the water supply device is turned on to inject water into the transfer container until the liquid level in the transfer container reaches the preset liquid level.

[0061] Beneficial effects of the present invention:

[0062] In the technical solutions of the harmful substance transfer equipment and the harmful substance transfer method provided by the present invention, the transfer container whose inner wall is coated with a polytetrafluoroethylene layer or made of polytetrafluoroethylene is used to store harmful substances, which has good corrosion resistance and safety and is suitable for the storage of various harmful substances. At the same time, the water supply device and the air supply device can be used to achieve water sealing and air sealing of the transfer container, thereby ensuring the safe transfer of harmful substances. In addition, by using a liquid extraction pipeline to directly pump the liquid of the harmful substance into the transfer container, the harmful substance can be prevented from directly contacting the staff and the external environment, thereby effectively reducing the risks of environmental pollution accidents, fire accidents, and hazards to the occupational health of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 A structural diagram of a harmful substance transfer device provided by an embodiment of the present invention;

[0064] Figure 2 A structural block diagram of a control system used in an embodiment of the present invention;

[0065] Figure 3 A flowchart of a harmful substance transfer method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0066] In order to enable those skilled in the art to better understand the technical solution of the present invention, the harmful substance transfer device and harmful substance transfer method provided by the present invention are described in detail below with reference to the accompanying drawings.

[0067] See also Figure 1The harmful substance transfer device provided by the embodiment of the present invention can be applied to the transfer of harmful substances in liquid form, or harmful substances that can be dissolved into liquid form. For example, yellow phosphorus, sulfuric acid or sodium hydroxide solution, etc. These harmful substances are usually contained in a recycling container 1 on site. The recycling container 1 is, for example, a plastic barrel. The harmful substances can be directly stored in the empty recycling container 1, or water can be added to the recycling container 1 and the harmful substances can be immersed in the water.

[0068] The harmful substance transfer equipment includes a transfer container 2, a liquid extraction pipeline 3, a water supply device, an air supply device and an exhaust pipeline 11, wherein the transfer container 2 is closed and its inner wall is coated with a polytetrafluoroethylene layer. Polytetrafluoroethylene (Poly TetraFluoroe Thylene, abbreviated as PTFE) has the characteristics of acid and alkali resistance and organic solvent resistance, and is almost insoluble in all solvents. Therefore, the polytetrafluoroethylene layer has good corrosion resistance and safety, can well protect the transfer container 2, and is suitable for the storage of a variety of harmful substances. At the same time, polytetrafluoroethylene is also resistant to high temperatures and easy to clean, has a long service life, and is easy to clean and maintain. Optionally, the transfer container 2 is made of polyethylene plastic. Of course, in actual applications, the transfer container 2 can also be made of polytetrafluoroethylene as a whole.

[0069] Optionally, the transfer container 2 specifically includes a barrel body with an opening at the top and a barrel cover that closes the opening. The barrel body and the barrel cover can be threadedly connected by fasteners, and a sealing structure is provided between the two to seal the interior of the barrel body. The sealing structure is, for example, a sealing ring.

[0070] The liquid extraction pipeline 3 is connected to the transfer container 2 and the recovery container 1 respectively, and a liquid extraction pump 8 is arranged on the liquid extraction pipeline 3 for extracting the liquid of the harmful substance in the recovery container 1 to the transfer container 2; and a first on-off valve 7 is also arranged on the liquid extraction pipeline 3 for connecting or disconnecting the liquid extraction pipeline 3. Optionally, the first on-off valve 7 is an automatic control valve such as a solenoid valve, so as to realize automatic control.

[0071] It is easy to understand that for liquid harmful substances, they can be directly extracted from the recovery container 1 using the liquid extraction pipeline 3, while for solid harmful substances, the harmful substances need to be dissolved into liquid before extraction.

[0072] By using the liquid extraction pipeline 3 to directly pump the harmful liquid into the transfer container 2, the harmful liquid can be prevented from directly contacting the staff and the external environment, thereby effectively reducing the risks of environmental pollution accidents, fire accidents, and hazards to the occupational health of workers.

[0073] The water supply device is connected to the transfer container 2, and is used to inject water into the transfer container 2 and recover the water in the transfer container 2. In this embodiment, the water supply device includes a water tank 9, a water inlet pipeline 13 and a water return pipeline 16, wherein the water tank 9 is used to store water. The water inlet pipeline 13 is connected to the water tank 9 and the transfer container 2 respectively, and a water pump 14 is provided on the water inlet pipeline 13, which is used to pump the water in the water tank 9 into the transfer container 2; and a third on-off valve 15 is provided on the water inlet pipeline 13, which is used to connect or disconnect the water inlet pipeline 13. Optionally, the third on-off valve 15 is an automatic control valve such as a solenoid valve, so as to realize automatic control.

[0074] The return water pipeline 16 is connected to the water tank 9 and the transfer container 2 respectively, and is used to recover the water in the transfer container 2, and a fourth on-off valve 17 is provided on the return water pipeline 16, and is used to connect or disconnect the return water pipeline 16. Optionally, the fourth on-off valve 17 is an automatic control valve such as a solenoid valve, so as to realize automatic control.

[0075] In addition, the water supply device further comprises a ventilation pipeline 30, which is connected to the water tank 9, and a sixth on-off valve 31 is arranged on the ventilation pipeline 30. Optionally, the sixth on-off valve 31 is an automatic control valve such as a solenoid valve, so as to realize automatic control.

[0076] The gas supply device is connected to the transfer container 2, and is used to provide an inert gas to the transfer container 2. The inert gas is preferably nitrogen, which has high safety and low cost. In the present embodiment, the gas supply device includes a gas source 10 and a gas supply pipeline 18, wherein the gas source 10 is used to provide an inert gas; the gas supply pipeline 18 is connected to the gas source 10 and the transfer container 2, respectively, and the inert gas from the gas source 10 is transported to the transfer container 2, and a fifth on-off valve 20 is provided on the gas supply pipeline 18, which is used to connect or disconnect the gas supply pipeline 18. Optionally, the fifth on-off valve 20 is an automatic control valve such as a solenoid valve, so as to facilitate automatic control.

[0077] In this embodiment, the gas source 10 includes a gas storage bottle; and a gas supply pump 19 is also provided on the gas supply pipeline 18 for pumping the inert gas in the gas storage bottle into the transfer container 2 .

[0078] By utilizing the water supply device and the air supply device, the transfer container 2 can be water-tight and air-tight, thereby ensuring the safe transfer of harmful substances.

[0079] The exhaust pipeline 11 is connected to the transfer container 2 for exhausting the gas in the transfer container 2, and a second on-off valve 12 is provided on the exhaust pipeline 11. Optionally, the second on-off valve 12 is an automatic control valve such as a solenoid valve, so as to realize automatic control.

[0080] Optionally, the connections between the transfer container 2 and the liquid extraction pipeline 3, the water supply device (including the water inlet pipeline 13 and the water return pipeline 16), the air supply device (including the air supply pipeline 18) and the exhaust pipeline 11 are all detachable, so as to facilitate the transfer and replacement of the transfer container 2. Preferably, the liquid extraction pipeline 3 and the transfer container 2, the water supply device and the transfer container 2, the air supply device and the transfer container 2, and the exhaust pipeline 11 and the transfer container 2 are all connected by quick connectors. The so-called quick connector is a connector structure that can be sealed and connected to an external pipeline. The quick connector has the advantages of easy operation, reliable fixation, and good sealing effect.

[0081] In this embodiment, the harmful substance transfer device further includes a heating device for heating the liquid in the recovery container 1 so as to dissolve the solid harmful substances into liquid. Specifically, the heating device includes a heating pipeline 23 and a heat exchanger 22, wherein the heating pipeline 23 is immersed in the liquid in the recovery container 2, and the water inlet and return end of the heating pipeline 23 are respectively connected to the water outlet and water inlet of the heat exchanger 22, so as to realize the circulation of water. The heat exchanger 22 is used to heat the water in the heating pipeline 23.

[0082] It should be noted that the above heating device is suitable for the case where water is stored in the recovery container 1, and solid harmful substances in the water are heated by heating the water. However, the present invention is not limited to this. In practical applications, a device for dissolving harmful substances into liquids can also be provided according to different characteristics of harmful substances. Of course, in practical applications, for liquid harmful substances, the above heating device does not need to be provided.

[0083] In this embodiment, the harmful substance transfer device further includes a temperature sensor 6 for detecting the temperature of the liquid in the recovery container 1. Thus, the heating device can be automatically turned on and off according to the information fed back by the temperature sensor 6 to achieve automatic control.

[0084] In this embodiment, the harmful substance transfer device further includes a liquid level sensor 21 for detecting the liquid level of the transfer container 2. Thus, the water supply device, the air supply device and the exhaust pipeline 11 can be automatically controlled on and off according to the information fed back by the liquid level sensor 21 to achieve automatic control.

[0085] In this embodiment, the harmful substance transfer device further includes an alarm device 271, which is used to alarm by at least one of sound, light and display. The alarm device 271 is, for example, a buzzer, which usually emits a buzzing sound and a flashing LED light when an alarm is issued.

[0086] Optionally, the pest transfer equipment also includes a control system, see Figure 2 , the control system includes:

[0087] A liquid pump contactor, a first relay for controlling the on-off of the liquid pump contactor and the first on-off valve 7, and a first switch for controlling the on-off of the circuit where the liquid pump contactor is located;

[0088] A water pump contactor, a second relay for controlling the on / off of the water pump contactor and the third on / off valve 15, and a second switch for controlling the on / off of the circuit where the water pump contactor is located;

[0089] A heating contactor, a third relay for controlling the on and off of the heating contactor, and a third switch for controlling the on and off of the circuit where the heating contactor is located; the heating contactor is used to connect the heat exchanger 22 of the heating device;

[0090] An air supply pump contactor, a fourth relay for controlling the on-off of the air supply pump contactor and the fifth on-off valve 20, and a fourth switch for controlling the on-off of the circuit where the air supply pump contactor is located;

[0091] a fifth relay for controlling the on and off of the second on-off valve 12;

[0092] a sixth relay for controlling the on and off of the fourth on-off valve 17;

[0093] A seventh relay for controlling the on and off of the alarm device;

[0094] an eighth relay for controlling the on and off of the sixth on-off valve 31;

[0095] A main contactor and a main switch for controlling the on and off of the circuit where the main contactor is located;

[0096] A programmable controller, used for controlling the actions of the first to eighth relays and receiving status feedback signals from each contactor;

[0097] The first control module is used to receive feedback signals from the temperature sensor 6 and the liquid level sensor 21 respectively, and send them to the programmable controller;

[0098] A display device, used for displaying under the control of a programmable controller;

[0099] An input device, used to receive instruction information input by a user and send it to a programmable controller;

[0100] A DC power supply is used to supply power to the circuits where each component is located;

[0101] a fifth switch, used to control the on and off of the DC power supply; and

[0102] The power on button and the power off button (272, 273) are used to control the connection and disconnection of the main contactor respectively.

[0103] With the help of the above control system, automatic control of each component can be achieved, and it also has human-computer interaction function, programmable function, display function and alarm function, etc.

[0104] In practical applications, the first controller and the programmable controller may be microprocessors such as PLCs, computers, etc.

[0105] It should be noted that each of the above relays is an intermediate relay, including a normally open contact provided on a connection circuit with each component, and a coil for controlling the action of the normally open contact under the control of a programmable controller. Each relay is used to control the opening and closing of a corresponding contactor, and can play a role in electrical isolation and voltage conversion.

[0106] Optionally, in order to achieve electrical isolation, there are two DC power supplies, namely a first DC power supply and a second DC power supply, wherein the first DC power supply is used to supply power to the circuit where the normally open contacts of each relay are located; the second DC power supply is used to supply power to the display device, the input device, the first control module, the temperature sensor 6, the liquid level sensor 21, the programmable controller, the coils of each relay, and the circuit where each contactor is located.

[0107] In addition, for the alarm device 271, during the monitoring process, if the above-mentioned programmable controller finds that a component fails or a parameter exceeds the set threshold, it can control the alarm device 271 to alarm, and can also control the display device to display the alarm content, for example, the display device displays the corresponding component position in reverse color.

[0108] In this embodiment, the harmful substance transfer equipment also includes a shell 25 and an embedded touch screen 26, wherein the transfer container 2, the water supply device, the air supply device and the exhaust pipe 11 are all arranged in the left area of ​​the shell 25, and the right area of ​​the shell 25 is the electrical cabinet 24.

[0109] The housing 25 has a grounding member 28 and a circuit static electricity extraction device (not shown in the figure) for effectively preventing and controlling the fire risk caused by static electricity.

[0110] Optionally, a roller 29 for moving the housing 25 is also provided at the bottom of the housing 25. Thus, the mobility of the entire device can be achieved, so that it can be applied to a variety of different scenarios.

[0111] In this embodiment, the embedded touch screen 26 is arranged on the outer wall of the shell 25, and has both display and input functions. Under the control of the programmable controller, the embedded touch screen 26 can display content including working parameters, status, command input, etc. At the same time, the embedded touch screen 26 can also receive command information input by the user and send it to the controller to realize human-computer interaction, editable functions, etc.

[0112] It should be noted that, in actual applications, a display device and an input device may be separately provided to replace the above-mentioned embedded touch screen 26, and the display device is displayed under the control of the programmable controller, such as a display screen. The input device is used to receive the command information input by the user and send it to the programmable controller, such as a keyboard, button, etc.

[0113] It should also be noted that, in this embodiment, the control system further includes two standby relays, namely the ninth relay and the tenth relay. Of course, in practical applications, the number of standby relays can be increased or decreased according to specific circumstances.

[0114] As another technical solution, see Figure 3 The embodiment of the present invention also provides a harmful substance transfer method, which uses the harmful substance transfer device provided by the embodiment of the present invention to transfer harmful substances. Figure 1 Taking the harmful substance transfer device shown in the figure as an example, the method includes the following steps:

[0115] S1, after the transfer container 2 is filled with water, it is connected to the liquid extraction pipeline 3, the water supply device, the air supply device and the exhaust pipeline 11.

[0116] In step S1 , by filling the transfer container 2 with water before installation, the air in the transfer container 2 can be exhausted to ensure that there is no air in the transfer container 2 after installation.

[0117] S2, start the gas supply device to provide inert gas to the transfer container 2, and at the same time start the water supply device to recover the water in the transfer container 2.

[0118] In step S2, the water-tight seal can be converted to an air-tight seal. Specifically, the fifth on-off valve 20 on the gas source 10 and the gas supply pipeline 18 is first opened to supply inert gas to the transfer container 2, and the fourth on-off valve 17 on the water return pipeline 16 is opened to recover water in the transfer container 2.

[0119] S3, after the water in the transfer container 2 is drained, the air supply device and the water supply device are turned off.

[0120] That is, the gas source 10, the fifth on-off valve 20 and the fourth on-off valve 17 are closed to stop the gas supply and the recovery of water.

[0121] S4, open the first on-off valve 7 and the liquid pump 8 on the liquid extraction pipeline 3 to extract the liquid of harmful substances in the recovery container 1 into the transfer container 2, and at the same time open the second on-off valve 12 on the exhaust pipeline 11 to exhaust the gas in the transfer container 2.

[0122] S5, when the liquid level in the transfer container 2 reaches a preset liquid level or there is no untransferred harmful substance in the recovery container 1, the first on-off valve 7, the liquid pump 8 and the second on-off valve 12 are closed.

[0123] During the process of step S4, the controller and the liquid level sensor 21 can be used to realize automatic control. Specifically, the liquid level sensor 21 detects the liquid level of the transfer container 2 in real time and sends a signal to the controller; under the condition that there are untransferred harmful substances in the recovery container 1, the controller determines whether the current liquid level of the transfer container 2 exceeds the preset liquid level according to the signal fed back by the liquid level sensor 21. If so, the first on-off valve 7, the liquid pump 8 and the second on-off valve 12 are controlled to be closed; if not, the transfer action of the harmful substances is continued. If the current liquid level of the transfer container 2 does not exceed the preset liquid level, but there are no untransferred harmful substances in the recovery container 1, the controller controls the first on-off valve 7, the liquid pump 8 and the second on-off valve 12 to be closed.

[0124] After step S3 and before step S4, the method further includes:

[0125] The liquid in the recovery container 1 is heated until the solid harmful substances are dissolved into liquid.

[0126] Of course, in practical applications, it can be selected whether to heat the liquid in the recovery container 1 according to specific circumstances.

[0127] In the process of performing step S4, automatic control can be realized by using the controller and the temperature sensor 6. Specifically, the temperature sensor 6 detects the temperature of the liquid in the recovery container 1 in real time and sends a signal to the controller; the controller determines whether the current temperature of the liquid in the recovery container 1 exceeds the preset temperature according to the signal fed back by the temperature sensor 6, and if so, controls the heating device to be turned off, and if not, continues the heating action.

[0128] After step S5, the method further includes:

[0129] If the liquid level in the transfer container 2 reaches the preset liquid level and there are untransferred harmful substances in the recovery container 1, a new transfer container 2 is replaced and the process returns to step S1. That is, the new transfer container 2 is used to continue transferring the remaining harmful substances.

[0130] If the liquid level in the transfer container 2 does not reach the preset liquid level, and there is no untransferred harmful substance in the recovery container 1, the water supply device is turned on to inject water into the transfer container 2 until the liquid level in the transfer container 2 reaches the preset liquid level. In this way, the liquid level in the transfer container 2 can still reach the preset liquid level, ensuring the effectiveness of the water seal.

[0131] In summary, in the technical solutions of the harmful substance transfer equipment and the harmful substance transfer method provided by the embodiments of the present invention, the transfer container whose inner wall is coated with a polytetrafluoroethylene layer or made of polytetrafluoroethylene is used to store harmful substances, which has good corrosion resistance and safety, and is suitable for the storage of a variety of harmful substances. At the same time, by using a water supply device and an air supply device, the water seal and air seal of the transfer container can be achieved, thereby ensuring the safe transfer of harmful substances. In addition, by using a liquid extraction pipeline to directly pump the liquid of the harmful substance into the transfer container, the harmful substance can be prevented from directly contacting the staff and the external environment, thereby effectively reducing the risks of environmental pollution accidents, fire accidents, and hazards to the occupational health of workers.

[0132] 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 skilled 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 method for transferring harmful substances, characterized in that: The harmful substances are transferred by using a harmful substance transfer device, the harmful substances are contained in a recovery container, and the harmful substance transfer device comprises: A closed transfer container, the inner wall of which is coated with a polytetrafluoroethylene layer, or the transfer container is made of polytetrafluoroethylene; A liquid extraction pipeline is connected to the transfer container and the recovery container respectively, and a liquid extraction pump is arranged on the liquid extraction pipeline to extract the liquid of the harmful substance in the recovery container to the transfer container; and a first on-off valve is also arranged on the liquid extraction pipeline; a water supply device connected to the transfer container and used to inject water into the transfer container and recover the water in the transfer container; a gas supply device connected to the transfer container and used to provide inert gas to the transfer container so that the water supply device can recover water in the transfer container; an exhaust pipeline connected to the transfer container and used to exhaust the gas in the transfer container, and a second on-off valve is arranged on the exhaust pipeline; A liquid level sensor for detecting the liquid level of the transfer container; wherein the water supply device is used to inject water into the transfer container until the liquid level in the transfer container reaches the preset liquid level when the liquid level in the transfer container does not reach the preset liquid level and there is no untransferred harmful substance in the recovery container; Wherein, the gas supply device comprises: A gas source, used to provide the inert gas; the gas source comprises a gas storage bottle; A gas supply pipeline is connected to the gas source and the transfer container respectively, and delivers the inert gas from the gas source to the transfer container, and a fifth on-off valve is arranged on the gas supply pipeline; a gas supply pump is also arranged on the gas supply pipeline, and is used to pump the inert gas in the gas storage bottle into the transfer container; The water supply device comprises: Water tank; a water inlet pipeline, connected to the water tank and the transfer container respectively, and provided with a water pump on the water inlet pipeline for pumping water in the water tank into the transfer container; and a third on-off valve is provided on the water inlet pipeline; a water return pipeline, connected to the water tank and the transfer container respectively, for recovering water in the transfer container, and a fourth on-off valve is arranged on the water return pipeline; The harmful substance transfer method comprises the following steps: S1, after the transfer container is filled with water, it is connected to the liquid extraction pipeline, the water supply device, the air supply device and the exhaust pipeline; S2, turning on the gas supply device to provide inert gas to the transfer container, and turning on the water supply device to recover water in the transfer container; S3, after the water in the transfer container is drained, closing the air supply device and the water supply device; S4, opening the first on-off valve and the liquid pump to pump the liquid of the harmful substance in the recovery container into the transfer container, and at the same time opening the second on-off valve to discharge the gas in the transfer container; S5, when the liquid level in the transfer container reaches a preset liquid level or there is no untransferred harmful substance in the recovery container, closing the first on-off valve, the liquid pump and the second on-off valve; after step S5, further comprising: If the liquid level in the transfer container does not reach the preset liquid level and there is no untransferred harmful matter in the recovery container, the water supply device is turned on to inject water into the transfer container until the liquid level in the transfer container reaches the preset liquid level.

2. The harmful substance transfer method according to claim 1, characterized in that: The harmful substance transfer device further comprises a heating device for heating the liquid in the recovery container so as to dissolve the solid harmful substances in the liquid into liquid; After step S3 and before step S4, the method further includes: The liquid in the recovery container is heated until the solid harmful substances are dissolved into liquid.

3. The harmful substance transfer method according to claim 1, characterized in that: After step S5, the method further includes: If the liquid level in the transfer container reaches the preset liquid level and there are untransferred harmful substances in the recovery container, a new transfer container is replaced and the process returns to step S1.

4. The harmful substance transfer method according to claim 1, characterized in that: The liquid extraction pipeline and the transfer container, the water supply device and the transfer container, the air supply device and the transfer container, and the exhaust pipeline and the transfer container are all connected via quick connectors.

5. The harmful substance transfer method according to claim 2, characterized in that: The heating device comprises a heating pipeline and a heat exchanger, wherein: The heating pipeline is immersed in the liquid in the recovery container, and the water inlet and water return ends of the heating pipeline are respectively connected to the water outlet and water inlet of the heat exchanger; The heat exchanger is used to heat the water in the heating pipeline.

6. The harmful substance transfer method according to claim 5, characterized in that: The harmful substance transfer device further comprises a temperature sensor for detecting the temperature of the liquid in the recovery container.

7. The harmful substance transfer method according to claim 6, characterized in that: The harmful substance transfer equipment also includes an alarm device.

8. The harmful substance transfer method according to claim 7, characterized in that: The harmful substance transfer device also includes a control system, and the control system includes: A liquid pump contactor, a first relay for controlling the on / off of the liquid pump contactor and the first on / off valve, and a first switch for controlling the on / off of the circuit where the liquid pump contactor is located; A water pump contactor, a second relay for controlling the on / off of the water pump contactor and the third on / off valve, and a second switch for controlling the on / off of the circuit where the water pump contactor is located; A heating contactor, a third relay for controlling the on and off of the heating contactor, and a third switch for controlling the on and off of the circuit where the heating contactor is located; An air supply pump contactor, a fourth relay for controlling the on-off of the air supply pump contactor and the fifth on-off valve, and a fourth switch for controlling the on-off of the circuit where the air supply pump contactor is located; a fifth relay for controlling the on and off of the second on-off valve; a sixth relay for controlling the on and off of the fourth on-off valve; a seventh relay for controlling the on and off of the alarm device; an eighth relay for controlling the on and off of the sixth on-off valve; A main contactor and a main switch for controlling the on and off of the circuit where the main contactor is located; A programmable controller, used for controlling the actions of the first to eighth relays and receiving status feedback signals from each contactor; A first control module, used for receiving feedback signals from the temperature sensor and the liquid level sensor respectively, and sending the feedback signals to the programmable controller; A display device, used for displaying under the control of the programmable controller; An input device, used to receive instruction information input by a user and send it to the programmable controller; A DC power supply is used to supply power to the circuits where each component is located; a fifth switch, used to control the on and off of the DC power supply; and The power on button and the power off button are used to control the connection and disconnection of the main contactor respectively.

9. The harmful substance transfer method according to claim 8, characterized in that: There are two DC power supplies, namely a first DC power supply and a second DC power supply, wherein: The first DC power supply is used to supply power to the circuit where the normally open contacts of each relay are located; The second DC power supply is used to supply power to the display device, the input device, the first control module, the temperature sensor, the liquid level sensor, the programmable controller, the coils of each relay, and the circuits where each contactor is located.

10. The harmful substance transfer method according to claim 8, characterized in that: The harmful substance transfer equipment also includes: The housing has a grounding member and a circuit static electricity guide device; the transfer container, the water supply device, the air supply device and the exhaust pipeline are all arranged in the housing; The display device is arranged on the outer wall of the housing.

11. The harmful substance transfer method according to claim 8, characterized in that: The harmful substance transfer device also includes an embedded touch screen that serves as both the display device and the input device.

12. The harmful substance transfer method according to claim 10, characterized in that: A roller which enables the shell to move is also arranged at the bottom of the shell.

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