A mobile solidification device for low-radioactive waste oil and its solidification process

Abstract

The present invention discloses a mobile curing device for low-radioactive waste oil and a curing process thereof. The entire curing device is integrated in a skid, including a waste oil storage system for conveying and storing waste oil, a solid powder adding system for conveying solid powder, a preheating system connected to the waste oil storage system and the solid powder adding system and capable of preheating and mixing the waste oil and the solid powder, an alkali solution adding system for conveying alkali solution, a curing system connected to the preheating system and the alkali solution adding system and capable of stirring and heating the alkali solution and oil powder mixture to generate a cured product, a packaging and packaging system for extruding the cured product and packaging it, and an air purification system capable of extracting the waste gas generated during the operation of each system. The curing device provided by the present invention is fully integrated in a skid, can realize the automated processing of the waste oil curing process, can well isolate the high temperature, alkali solution, and radiation of the curing device, and ensure the safety of the staff.

Description

Technical Field

[0001] The invention relates to the technical field of low-radioactive waste engine oil treatment, and in particular to a mobile solidification device for low-radioactive waste engine oil and a solidification process thereof. Background Art

[0002] Low-level organic waste liquid is a radioactive liquid substance at room temperature. There are safety risks in the transportation process, so it needs to be solidified. If it is directly operated by humans during the treatment process, there is a possibility that the workers will come into direct contact with the radioactive liquid, and the operators will also be irradiated by radioactive substances; in addition, the solidification process of waste oil needs to be carried out in a high temperature environment and requires the use of high concentrations of alkali, which poses safety hazards during the solidification process. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a mobile solidification device for low-radioactive waste oil and a solidification process thereof, which can realize the automated processing of the waste oil solidification process and ensure the safety of the staff.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A mobile solidification device for low-radioactive waste oil, the entire solidification device is integrated in a skid, and includes a waste oil storage system for conveying and storing waste oil, a solid powder adding system for conveying solid powder, a preheating system connected to the waste oil storage system and the solid powder adding system and capable of preheating and mixing the waste oil and the solid powder, an alkali solution adding system for conveying alkali solution, a curing system connected to the preheating system and the alkali solution adding system and capable of stirring and heating the alkali solution and oil powder mixture to generate a solidified product, a packaging system for extruding the solidified product into a shape and packaging it, and an air purification system capable of extracting waste gas generated during the operation of each system.

[0006] Furthermore, the waste oil storage system includes a waste oil collection tank for storing waste oil, a receiving tube welded to the upper end of the waste oil collection tank, a manual valve arranged on the receiving tube, a quick-connect joint arranged at the receiving tube port for communicating with an external waste oil storage tank, an output pipe arranged at the lower end of the waste oil collection tank for conveying the waste oil to the preheating system, and a first solenoid valve installed on the output pipe; a Y-type filter for removing impurities in the waste oil is installed between the manual valve and the quick-connect joint, a vacuum pump capable of conveying waste oil is also installed on the receiving tube, and an output metering pump for conveying waste oil is provided on the output pipe.

[0007] Furthermore, the alkali solution adding system includes an alkali solution storage tank capable of pre-treating external alkali solution, an alkali solution hopper arranged at the upper end of the alkali solution storage tank for adding alkali solution into the alkali solution storage tank, an alkali solution tank level gauge capable of detecting the alkali solution level in the alkali solution storage tank, an alkali solution discharge pipe arranged at the lower end of the alkali solution storage tank for outputting alkali solution, a clean water storage tank for storing clean water, a clean water outlet pipe for conveying clean water from the clean water storage tank to the alkali solution storage tank, and an alkali solution stirring shaft installed in the alkali solution storage tank capable of achieving stirring effect; a second solenoid valve and an alkali solution diaphragm metering pump capable of providing driving force to make the alkali solution flow from the alkali solution discharge pipe into the curing system are installed on the alkali solution discharge pipe; a third solenoid valve and a clean water pump capable of providing driving force to make the clean water flow from the clean water outlet pipe into the alkali solution storage tank are provided on the clean water outlet pipe; the alkali solution stirring shaft is provided with a driving force by a first reduction motor fixed above the alkali solution storage tank by a bracket.

[0008] Furthermore, the solid powder adding system includes a feeding funnel for adding solid powder, a conveying pipe connected to the lower end of the feeding funnel and connected to the preheating system, a screw conveyor arranged in the conveying pipe for material transportation, and a conveying motor for providing driving force to the screw conveyor.

[0009] Furthermore, the preheating system includes a preheating tank with a waste oil feed pipe and a solid powder discharge hopper at the upper end, a preheating stirring shaft arranged inside the preheating tank and capable of realizing a stirring function and provided with a stirring paddle thereon, a second reduction motor providing driving force for the preheating stirring shaft, a first heating jacket arranged on the outside of the preheating tank, an insulation jacket wrapped in the first heating jacket, and an oil-powder mixture discharge pipe arranged at the lower end of the preheating tank and connected to the curing system; the preheating tank is also provided with an exhaust pipe connected to its interior; the waste oil feed pipe is connected to the output pipe in the waste oil storage system; the solid powder discharge hopper is an incremental weighing hopper, and is connected to the conveying pipe in the solid powder addition system.

[0010] Furthermore, the curing system comprises a first reactor and a second reactor which are placed side by side, have the same shape and size, and are both provided with an oil-powder mixture feed port and an alkali solution feed port at the upper end, a piston which is arranged just above the first reactor and can extrude the material in the first reactor, an electric pressure cylinder which provides driving force for the piston, an agitator which is arranged in the second reactor, a third reduction motor which is located just above the second reactor and is connected to the agitator, a lifting mechanism which can lift or lower the third reduction motor and the agitator, a rotating mechanism which is arranged between the lifting mechanism and the electric pressure cylinder and can exchange positions of the agitator and the piston, a first product discharge port and a second product discharge port which are respectively arranged at the lower ends of the first reactor and the second reactor, and a second heating jacket which can heat the first reactor and the second reactor; the first product discharge port and the second product discharge port are both provided with a gate valve which can control the inflow and outflow of materials; the oil-powder mixture feed port is connected to the oil-powder mixture discharge pipe of the preheating system, and the alkali solution feed port is connected to the alkali solution discharge pipe of the alkali solution addition system;

[0011] The rotating mechanism includes a rotating shaft arranged between the first reactor and the second reactor, a rotating body fixedly connected to the rotating shaft and connected to the lifting mechanism on one side and the electric pressure cylinder on the other side, and a progressive motor providing driving force for the rotating body.

[0012] Furthermore, the packaging system includes a twin-screw extruder connected to the curing system and capable of extruding the cured product, a packaging machine for packaging the cured product, and a trolley translation mechanism for collecting the packaged and packaged cured product;

[0013] The twin-screw extruder comprises a rod-shaped hollow extruder body, a first feed hole and a second feed hole located on the extruder body and connected to the first product discharge port and the second product discharge port respectively, an extrusion discharge port provided at one end of the extruder body and capable of discharging the solidified product, and a twin screw disposed at the other end of the extruder body and capable of extruding the solidified product, and a fourth reduction motor providing extrusion driving force for the twin screw;

[0014] The packaging machine comprises a turntable divided into eight stations; a bag taking mechanism for grabbing prefabricated bags, a bag opening mechanism capable of fully opening the prefabricated bags, a feeding mechanism aligned with the extrusion outlet on the twin-screw extruder and capable of feeding the solidified product into the prefabricated bags, a counting mechanism for counting the prefabricated bags containing the solidified product, a feeding mechanism for pressing the solidified product in the prefabricated bags and exhausting the air in the bags, a first heat sealing mechanism and a second heat sealing mechanism for performing heat sealing twice on the opening of the prefabricated bags, and a cold sealing mechanism for cold sealing the prefabricated bags;

[0015] The trolley translation mechanism includes a base plate fixed on the ground, two tracks parallel to each other arranged on the base plate, a moving trolley capable of sliding and slidably on the tracks, a plurality of blocks arranged at both ends of the tracks capable of preventing the moving trolley from sliding out of the tracks, and a fifth reduction motor providing translation driving force to the moving trolley and connected to the moving trolley through a roller chain; a waste bucket is placed on the moving trolley for receiving the solidified product after cold packaging; a lifting mechanism capable of transmitting the solidified product after cold packaging is arranged between the packaging machine and the waste bucket.

[0016] The present invention also provides a low-radioactive waste oil solidification process, using the low-radioactive waste oil mobile solidification device as described above, comprising the following steps:

[0017] S1: Start the waste oil storage system to transfer the waste oil from the outside to the waste oil collection tank through the receiving pipe;

[0018] S2: Open the solenoid valve in the waste oil storage system, and deliver 48L of waste oil to the preheating system through the output pipe. During the delivery process, the output of the waste oil is measured by the output metering pump provided on the output pipe;

[0019] S3: Start the conveying motor in the solid powder adding system to drive the screw conveyor to convey the solid powder in batches to the solid powder hopper of the preheating system;

[0020] S4: Start the preheating system, heat the preheating tank to 90°C with the first heating jacket, and start the second reduction motor to drive the preheating stirring shaft and the stirring paddle to rotate, so that the waste oil and solid powder in the preheating tank are evenly mixed to obtain an oil-powder mixed liquid; the oil-powder mixed liquid is transmitted to the curing system through the oil-powder mixed liquid discharge pipe;

[0021] S5: starting the clean water pump of the alkali solution adding system to convey clean water to the alkali solution storage tank, adding solid alkali to the alkali solution hopper, and then turning on the first reduction motor to drive the alkali solution stirring shaft to fully mix the clean water and the solid alkali to obtain alkali solution; the alkali solution is conveyed to the curing system through the alkali solution discharge pipe under the alkali solution storage tank, and the alkali solution diaphragm metering pump on the alkali solution discharge pipe can meter the output alkali solution;

[0022] S6: generating a cured product in the curing system;

[0023] S601: The first reaction kettle and the second reaction kettle are heated to 90° C. by the second heating jacket in the curing system and kept warm;

[0024] S602: the oil-powder mixture and the alkali solution enter the second reaction kettle from the oil-powder mixture feed port and the alkali solution feed port respectively; the third reduction motor is turned on to drive the agitator to rotate, and the oil-powder mixture and the alkali solution are fully mixed and reacted to obtain a solidified product;

[0025] S603: After the reaction is completed, the lifting mechanism is started to lift the agitator to the outside of the second reactor, and then the step-up motor in the rotating mechanism is started to drive the rotating body and the rotating shaft to rotate 180 degrees, so that the agitator and the piston exchange positions;

[0026] S604: opening the gate valve on the second product discharge port, starting the electric pressure cylinder to squeeze the piston downward, and the solidified product in the second reaction kettle is squeezed to the second feed hole of the twin-screw extruder;

[0027] S605: while step S604 is being performed, steps S602 to S603 are performed in the first reaction kettle, and the solidified product is extruded into the first feed hole of the twin-screw extruder;

[0028] S606: After step S605 is completed, steps S602 to S605 are repeated in a cycle;

[0029] S7: Turn on the fourth reduction motor to drive the twin-screw extruder to extrude the solidified product, and the solidified product is extruded from the extrusion outlet to the packaging machine;

[0030] S8: Start the packaging machine, grab a prefabricated bag at the station corresponding to the bag taking mechanism on the turntable, rotate the turntable to the bag opening mechanism to inflate the prefabricated bag and open it, then rotate the turntable to the unloading mechanism to receive the solidified product extruded by the twin-screw extruder, and then continue to rotate the turntable to count, press cakes, perform the first hot packaging, the second hot packaging, and the cold packaging of the prefabricated bags containing the solidified product in sequence, and finally the prefabricated bag containing the solidified product is taken down by the bag taking mechanism and falls to the lifting mechanism;

[0031] S9: The lifting mechanism lifts the solidified product and transfers it to the waste bucket on the trolley translation mechanism; meanwhile, the cycle step S8 continues to package the solidified product.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The curing device provided by the present invention is fully integrated in the skid, which can realize the automated processing of the waste oil curing process. The staff operates outside the skid, which can well isolate the high temperature, alkali solution, and radiation of the curing device, thereby ensuring the safety of the staff.

[0034] (2) The present invention realizes the automation of the whole process, improves the efficiency of solidifying products, effectively reduces the workload of staff, and saves manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is the overall structure diagram of the present invention;

[0036] Figure 2This is a structural diagram of the waste oil storage system of the present invention;

[0037] Figure 3 This is a structural diagram of the alkali solution adding system of the present invention;

[0038] Figure 4 This is a structural diagram of the solid powder adding system of the present invention;

[0039] Figure 5 This is a structural diagram of the preheating system of the present invention;

[0040] Figure 6 This is a structural diagram of the curing system of the present invention;

[0041] Figure 7 It is a top view structural diagram of the curing system of the present invention;

[0042] Figure 8 It is a partial structural diagram of the curing system of the present invention;

[0043] Fig. 9 It is the structural diagram of the twin-screw extruder of the present invention;

[0044] Fig.10 It is the structural diagram of the packaging machine of the present invention;

[0045] Fig.11 This is a structural diagram of the trolley translation mechanism of the present invention;

[0046] Fig.12 It is a flowchart of the process of the present invention.

[0047] The names corresponding to the reference numerals are:

[0048] 1-waste oil storage system, 101-quick adapter, 102-Y-type filter, 103-manual valve, 104-vacuum pump, 105-receiving pipe, 106-waste oil collection tank, 107-first solenoid valve, 108-output pipe, 109-output metering pump;

[0049] 2-alkali solution adding system, 201-alkali solution tank level gauge, 202-alkali solution hopper, 203-alkali solution storage tank, 204-second solenoid valve, 205-alkali solution diaphragm metering pump, 206-alkali solution discharge pipe, 207-third solenoid valve, 208-clean water outlet pipe, 209-alkali solution stirring shaft, 210-clean water storage tank, 211-clean water pump, 212-first reduction motor;

[0050] 3-solid powder adding system, 301-conveying pipe, 302-material hopper, 303-conveying motor;

[0051] 4-preheating system, 401-second reduction motor, 402-exhaust pipe, 403-solid powder hopper, 404-preheating stirring shaft, 405-stirring paddle, 406-first heating jacket, 407-insulation jacket, 408-oil powder mixture discharge pipe, 409-preheating tank, 410-waste oil feed pipe;

[0052] 5-curing system, 501-electric pressure cylinder, 502-piston, 503-oil-powder mixture feed port, 504-first reactor, 505-second reactor, 506-second heating jacket, 507-lifting mechanism, 508-progress motor, 509-rotating body, 510-third reduction motor, 511-first product discharge port, 512-second product discharge port, 513-rotating shaft, 514-agitator, 515-alkali solution feed port;

[0053] 6-twin screw extruder, 601-extrusion outlet, 602-first feed hole, 603-second feed hole, 604-extruder body, 605-twin screw, 606-fourth reduction motor;

[0054] 7-packaging machine, 701-turntable, 702-bag taking mechanism, 703-bag opening mechanism, 704-feeding mechanism, 705-counting mechanism, 706-cake pressing mechanism, 707-first hot packaging mechanism, 708-second hot packaging mechanism, 709-cold packaging mechanism;

[0055] 8-trolley translation mechanism, 801-bottom plate, 802-track, 803-moving trolley, 804-roller chain, 805-block, 806-fifth reduction motor;

[0056] 9- Lifting mechanism;

[0057] 10- Air purification system. DETAILED DESCRIPTION

[0058] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The embodiments of the present invention include but are not limited to the following embodiments.

[0059] like Figures 1 to 12As shown, the present invention provides a mobile solidification device for low-radioactive waste oil, the entire solidification device is integrated in a skid, and includes a waste oil storage system 1 for conveying and storing waste oil, a solid powder adding system 3 for conveying solid powder, a preheating system 4 connected to the waste oil storage system 1 and the solid powder adding system 3 and capable of preheating and mixing the waste oil and the solid powder, an alkali solution adding system 2 for conveying alkali solution, a curing system 5 connected to the preheating system 4 and the alkali solution adding system 2 and capable of stirring and heating the alkali solution and oil powder mixture to generate a solidified product, a packaging system for extruding and packaging the solidified product, and an air purification system 10 capable of extracting waste gas generated during the operation of each system.

[0060] like Figure 2 As shown, the waste oil storage system 1 includes a waste oil collection tank 106 for storing waste oil, a receiving tube 105 welded to the upper end of the waste oil collection tank 106, a manual valve 103 arranged on the receiving tube 105, a quick adapter 101 arranged at the port of the receiving tube 105 for communicating with an external waste oil storage tank, an output pipe 108 arranged at the lower end of the waste oil collection tank 106 for conveying the waste oil to the preheating system 4, and a first solenoid valve 107 installed on the output pipe 108; a Y-type filter 102 for removing impurities in the waste oil is installed between the manual valve 103 and the quick adapter 101, a vacuum pump 104 capable of conveying waste oil is also installed on the receiving tube 105, and an output metering pump 109 for conveying waste oil is provided on the output pipe 108. The function of the waste oil storage system 1 is to transfer the waste oil from the outside to the waste oil collection tank 106 through the receiving pipe 105 for storage. When the waste oil needs to be solidified, the solenoid valve 107 is opened to transport 48L of waste oil to the preheating system 4 through the output pipe 108. During the transportation process, the output metering pump 109 arranged on the output pipe 108 measures the output amount of the waste oil.

[0061] During the solidification process of the waste oil, alkali solution needs to be added. The alkali usually used is solid alkali, so it needs to be dissolved and diluted before use. In this embodiment, the alkali solution addition system 2 performs alkali solution pretreatment. Figure 3As shown, the alkali solution adding system 2 includes an alkali solution storage tank 203 capable of pre-treating external alkali solution, an alkali solution hopper 202 arranged at the upper end of the alkali solution storage tank 203 for adding alkali solution into the alkali solution storage tank 203, an alkali solution tank level meter 201 capable of detecting the alkali solution level in the alkali solution storage tank 203, an alkali solution discharge pipe 206 arranged at the lower end of the alkali solution storage tank 203 for outputting the alkali solution, a clean water storage tank 210 for storing clean water, a clean water outlet pipe 208 for transporting clean water from the clean water storage tank 210 to the clean water storage tank 203, and a An alkali solution stirring shaft 209 capable of achieving stirring effect in the alkali solution storage tank 205; a second solenoid valve 204 and an alkali solution diaphragm metering pump 205 capable of providing driving force to make the alkali solution flow from the alkali solution discharge pipe 206 into the curing system 5 are installed on the alkali solution; a third solenoid valve 207 and a clean water pump 211 providing driving force to make the clean water flow from the clean water outlet pipe 208 into the alkali solution storage tank 203 are provided on the clean water outlet pipe 208; the alkali solution stirring shaft 209 is provided with driving force by a first reduction motor 212 fixed above the alkali solution storage tank 203 through a bracket.

[0062] During actual operation, the clean water pump 211 is started to transport clean water to the alkali solution storage tank 203, solid alkali is added to the alkali solution hopper 202, and then the first reduction motor 212 is turned on to drive the alkali solution stirring shaft 209 to fully mix the clean water and the solid alkali to obtain alkali solution; the alkali solution is transported to the curing system 5 through the alkali solution discharge pipe 206 below the alkali solution storage tank 203, and the alkali solution diaphragm metering pump 205 on the alkali solution discharge pipe 206 can meter the output alkali solution.

[0063] The solidification process of waste oil also requires the addition of solid powder, such as Figure 4 As shown, the solid powder is transported to the preheating system 4 through the solid powder adding system 3. The solid powder adding system 3 includes a feeding hopper 302 for adding solid powder, a conveying pipe 301 connected to the lower end of the feeding hopper 302 and connected to the preheating system, a screw conveyor arranged in the conveying pipe 301 for transporting materials, and a conveying motor 303 for providing driving force to the screw conveyor.

[0064] like Figure 5As shown in the figure, the function of the preheating system 4 is to mix the waste oil from the waste oil storage system 1 and the solid powder from the solid powder adding system 3 and heat them to obtain an oil-powder mixed liquid, which includes a preheating tank 409 with a waste oil feeding pipe 410 and a solid powder lower hopper 403 at the upper end, a preheating stirring shaft 404 arranged inside the preheating tank 409 and capable of realizing a stirring function and having a stirring paddle 405 thereon, a second reduction motor 401 providing a driving force for the preheating stirring shaft 404, and a preheating stirring shaft 404 arranged inside the preheating tank 409. The first heating jacket 406 outside the hot tank 409, the heat preservation jacket 407 wrapped in the first heating jacket 406, and the oil-powder mixture discharge pipe 408 connected to the curing system 5 at the lower end of the preheating tank 409; the preheating tank 409 is also provided with an exhaust pipe 402 connected to the interior thereof; the waste oil feed pipe 410 is connected to the output pipe 108 in the waste oil storage system 1; the solid powder material lower hopper 403 is an incremental weighing hopper, and is connected to the conveying pipe 301 in the solid powder material adding system 3. The waste oil and the solid powder material are mixed by the rotation of the preheating stirring shaft 404 and the stirring paddle 405 driven by the second reduction motor 401, and then the oil-powder mixture in the preheating tank 409 is heated to 90°C by the first heating jacket 406, and finally the oil-powder mixture is transmitted to the curing system 5 through the oil-powder mixture discharge pipe 408.

[0065] like Figures 6 to 8 As shown, the curing system 5 includes a first reactor 504 and a second reactor 505 which are placed side by side, have the same shape and size, and are both provided with an oil-powder mixture feed port 503 and an alkali solution feed port 515 at the upper end, a piston 502 which is arranged just above the first reactor 504 and can squeeze the material in the first reactor 504, an electric pressure cylinder 501 which provides a driving force for the piston 502, an agitator 514 which is arranged in the second reactor 505, a third reduction motor 510 which is located just above the second reactor 505 and is connected to the agitator 514, a lifting mechanism 507 which can lift or lower the third reduction motor 510 and the agitator 514, and a lifting mechanism 507 which is arranged on the lifting mechanism. A rotating mechanism between the mechanism 507 and the electric pressure cylinder 501 can enable the agitator 514 and the piston 502 to exchange positions, and a first product discharge port 511 and a second product discharge port 512 are respectively arranged at the lower ends of the first reactor 504 and the second reactor 505, and a second heating jacket 506 that can heat the first reactor 504 and the second reactor 505; the first product discharge port 511 and the second product discharge port 512 are both provided with a plug valve that can control the inflow and outflow of materials; the oil-powder mixture feed port 503 is connected to the oil-powder mixture discharge pipe 408 of the preheating system 4, and the alkali solution feed port 515 is connected to the alkali solution discharge pipe 206 of the alkali solution addition system 2.

[0066] The rotating mechanism includes a rotating shaft 513 arranged between the first reactor 504 and the second reactor 505, a rotating body 509 fixedly connected to the rotating shaft 513 and connected to the lifting mechanism 507 on one side and the electric pressure cylinder 501 on the other side, and a stepping motor 508 that provides driving force for the rotating body 509.

[0067] In the curing system 5, the oil-powder mixture and the alkali solution are mixed to obtain a cured product. The main operating steps are as follows:

[0068] S1: The first reaction kettle 504 and the second reaction kettle (505) are heated to 90°C and kept warm by the second heating jacket 506 in the curing system 5;

[0069] S2: The oil-powder mixture and the alkali solution enter the second reaction kettle 505 from the oil-powder mixture feed port 503 and the alkali solution feed port 515 respectively; the third reduction motor 510 is turned on to drive the agitator 514 to rotate, and the oil-powder mixture and the alkali solution are fully mixed and reacted to obtain a solidified product;

[0070] S3: After the reaction is completed, the lifting mechanism 507 is started to lift the stirrer 514 to the outside of the second reaction kettle 505, and then the stepping motor 508 in the rotating mechanism is started to drive the rotating body 509 and the rotating shaft 513 to rotate 180 degrees, so that the stirrer 514 and the piston 502 exchange positions;

[0071] S4: Open the gate valve on the second product discharge port 512, start the electric pressure cylinder 501 to squeeze the piston 502 downward, and the solidified product in the second reaction kettle 505 is squeezed to the second feed hole 603 of the twin-screw extruder 6;

[0072] S5: while step S604 is being performed, steps S602 to S603 are performed in the first reaction kettle 504, and at this time, the solidified product is extruded into the first feed hole 602 of the twin-screw extruder 6;

[0073] S6: After step S605 is completed, steps S602 to S605 are repeated in a cycle.

[0074] The solidified product obtained by the solidification system 5 is transmitted to the packaging system, which includes a twin-screw extruder 6 connected to the solidification system 5 and capable of extruding the solidified product, a packaging machine 7 for packaging the solidified product, and a trolley translation mechanism 8 for collecting the packaged solidified product.

[0075] The twin-screw extruder 6 extrude the solidified product to the packaging machine 7, which includes a rod-shaped hollow extruder body 604, a first feed hole 602 and a second feed hole 603 located on the extruder body 604 and connected to the first product outlet 511 and the second product outlet 512 respectively, an extrusion outlet 601 disposed at one end of the extruder body 604 and capable of discharging the solidified product, a twin screw 605 disposed at the other end of the extruder body 604 and capable of extruding the solidified product, and a fourth reduction motor 606 providing extrusion driving force for the twin screw 605.

[0076] The packaging machine 7 includes a turntable 701 divided into eight stations; a bag taking mechanism 702 for grabbing prefabricated bags, a bag opening mechanism 703 capable of fully opening the prefabricated bags, a feeding mechanism 704 aligned with the extrusion outlet 601 on the twin-screw extruder 6 and capable of feeding the solidified product into the prefabricated bags, a counting mechanism 705 for counting the prefabricated bags containing the solidified product, a cake pressing mechanism 706 for pressing the solidified product in the prefabricated bags and exhausting the air in the bags, a first heat sealing mechanism 707 and a second heat sealing mechanism 708 for performing heat sealing twice on the opening of the prefabricated bags, and a cold sealing mechanism 709 for cold sealing the prefabricated bags. During actual operation, the packaging machine 7 is started, and a prefabricated bag is grabbed at the station corresponding to the bag-taking mechanism 702 on the turntable 701. The turntable 701 rotates the station to the bag-opening mechanism 703 to inflate and open the prefabricated bag, and then the station is rotated to the unloading mechanism 704 to receive the solidified product extruded by the twin-screw extruder 6. Then the turntable 701 continues to rotate, and the prefabricated bags containing the solidified product are counted, pressed, hot-packaged for the first time, hot-packaged for the second time, and cold-packaged in turn. Finally, the prefabricated bag containing the solidified product is taken down by the bag-taking mechanism 702 and falls to the lifting mechanism 9. The lifting mechanism 9 is installed between the baler 7 and the trolley translation mechanism 8.

[0077] The trolley translation mechanism 8 includes a base plate 801 fixed on the ground, two rails 802 arranged on the base plate and parallel to each other, a mobile trolley 803 that can slide and translate on the rails 802, a plurality of blocks 805 arranged at both ends of the rails 802 to prevent the mobile trolley 803 from sliding out of the rails 802, and a fifth reduction motor 806 that provides translation driving force to the mobile trolley 803 and is connected to the mobile trolley 803 through a roller chain 804; a waste bucket is placed on the mobile trolley 803 for receiving the solidified product after the cold packaging is completed; the solidified product transmitted by the lifting mechanism 9 finally falls into the waste bucket for collection.

[0078] The curing device provided by the present invention is fully integrated in the skid, which can realize the automated processing of the waste oil curing process. The staff operates outside the skid, which can well isolate the high temperature, alkali solution, and radiation of the curing device, thereby ensuring the safety of the staff.

[0079] The above embodiment is only one of the preferred implementation modes of the present invention and should not be used to limit the protection scope of the present invention. Any changes or modifications that are made to the main design concept and spirit of the present invention and have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention.

Claims

1. A mobile solidification device for low-level radioactive waste oil, characterized in that: The entire curing device is integrated in a skid, and includes a waste oil storage system (1) for conveying and storing waste oil, a solid powder adding system (3) for conveying solid powder, a preheating system (4) connected to the waste oil storage system (1) and the solid powder adding system (3) and capable of preheating and mixing the waste oil and the solid powder, an alkali solution adding system (2) for conveying alkali solution, a curing system (5) connected to the preheating system (4) and the alkali solution adding system (2) and capable of stirring and heating the alkali solution and the oil powder mixture to generate a cured product, a packaging system for extruding and packaging the cured product, and an air purification system (10) capable of extracting waste gas generated by the waste oil during the operation of each system; The waste oil storage system (1) comprises a waste oil collection tank (106) for storing waste oil, a receiving pipe (105) welded to the upper end of the waste oil collection tank (106), a manual valve (103) arranged on the receiving pipe (105), a quick-connect joint (101) arranged at the end of the receiving pipe (105) for connecting with an external waste oil storage tank, an output pipe (108) arranged at the lower end of the waste oil collection tank (106) for conveying the waste oil to a preheating system (4), and a first solenoid valve (107) installed on the output pipe (108); a Y-type filter (102) for removing impurities in the waste oil is installed between the manual valve (103) and the quick-connect joint (101); a vacuum pump (104) capable of conveying waste oil is also installed on the receiving pipe (105); and an output metering pump (109) for conveying waste oil is provided on the output pipe (108).

2. The mobile solidification device for low-radioactive waste oil according to claim 1 is characterized in that: The alkali solution adding system (2) comprises an alkali solution storage tank (203) capable of pre-treating external alkali solution, an alkali solution hopper (202) disposed at the upper end of the alkali solution storage tank (203) for adding alkali solution into the alkali solution storage tank (203), an alkali solution tank level meter (201) capable of detecting the alkali solution level in the alkali solution storage tank (203), an alkali solution discharge pipe (206) disposed at the lower end of the alkali solution storage tank (203) for discharging the alkali solution, a clean water storage tank (210) for storing clean water, a clean water outlet pipe (208) for conveying clean water from the clean water storage tank (210) to the alkali solution storage tank (203), and a An alkali solution stirring shaft (209) capable of achieving stirring in the alkali solution storage tank (205); a second electromagnetic valve (204) and an alkali solution diaphragm metering pump (205) capable of providing driving force to allow the alkali solution to flow from the alkali solution discharge pipe (206) into the curing system (5) are installed on the alkali solution discharge pipe (206); a third electromagnetic valve (207) and a clean water pump (211) capable of providing driving force to allow clean water to flow from the clean water discharge pipe (208) into the alkali solution storage tank (203) are provided on the clean water outlet pipe (208); the alkali solution stirring shaft (209) is provided with driving force by a first reduction motor (212) fixed above the alkali solution storage tank (203) through a bracket.

3. The mobile solidification device for low-radioactive waste oil according to claim 2 is characterized in that: The solid powder adding system (3) comprises a feeding hopper (302) for adding solid powder, a conveying pipe (301) connected to the lower end of the feeding hopper (302) and connected to the preheating system, a screw conveyor arranged in the conveying pipe (301) for transporting materials, and a conveying motor (303) for providing driving force to the screw conveyor.

4. The mobile solidification device for low-radioactive waste oil according to claim 3 is characterized in that: The preheating system (4) comprises a preheating tank (409) having a waste oil feed pipe (410) and a solid powder material discharge hopper (403) at its upper end, a preheating stirring shaft (404) which is arranged inside the preheating tank (409) and has a stirring function and a stirring paddle (405) thereon, a second reduction motor (401) which provides driving force for the preheating stirring shaft (404), a first heating jacket (406) arranged outside the preheating tank (409), and a protective film (406) wrapped around the first heating jacket (406). The invention relates to a temperature jacket (407), and an oil-powder mixture discharge pipe (408) arranged at the lower end of the preheating tank (409) and connected to the curing system (5); the preheating tank (409) is also provided with an exhaust pipe (402) connected to the interior thereof; the waste oil feed pipe (410) is connected to the output pipe (108) in the waste oil storage system (1); the solid powder discharge hopper (403) is an incremental weighing hopper, and is connected to the conveying pipe (301) in the solid powder adding system (3).

5. The mobile solidification device for low-radioactive waste oil according to claim 4 is characterized in that: The curing system (5) comprises a first reactor (504) and a second reactor (505) which are placed side by side, have the same shape and size, and are both provided with an oil-powder mixture feed port (503) and an alkali solution feed port (515) at the upper end; a piston (502) arranged directly above the first reactor (504) and capable of squeezing the material in the first reactor (504); an electric pressure cylinder (501) providing a driving force for the piston (502); an agitator (514) arranged in the second reactor (505); a third reduction motor (510) located directly above the second reactor (505) and connected to the agitator (514); a lifting mechanism (507) capable of lifting or lowering the third reduction motor (510) and the agitator (514); and a lifting mechanism (507) arranged on the lifting mechanism. A rotating mechanism capable of exchanging positions between the stirrer (514) and the piston (502) is provided between the structure (507) and the electric pressure cylinder (501); a first product discharge port (511) and a second product discharge port (512) are respectively arranged at the lower ends of the first reaction kettle (504) and the second reaction kettle (505); and a second heating jacket (506) capable of heating the first reaction kettle (504) and the second reaction kettle (505); the first product discharge port (511) and the second product discharge port (512) are both provided with a plug valve capable of controlling the inflow and outflow of materials; the oil-powder mixture feed port (503) is connected to the oil-powder mixture discharge pipe (408) of the preheating system (4); and the alkali solution feed port (515) is connected to the alkali solution discharge pipe (206) of the alkali solution addition system (2); The rotating mechanism includes a rotating shaft (513) arranged between the first reactor (504) and the second reactor (505), a rotating body (509) fixedly connected to the rotating shaft (513) and connected to the lifting mechanism (507) on one side and connected to the electric pressure cylinder (501) on the other side, and a stepping motor (508) providing driving force for the rotating body (509).

6. The mobile solidification device for low-level radioactive waste oil according to claim 5 is characterized in that: The packaging system comprises a twin-screw extruder (6) connected to the curing system (5) and capable of extruding the cured product, a packaging machine (7) for packaging the cured product, and a trolley translation mechanism (8) for collecting the packaged and packaged cured product; The twin-screw extruder (6) comprises a rod-shaped hollow extruder body (604), a first feed hole (602) and a second feed hole (603) located on the extruder body (604) and connected to the first product discharge port (511) and the second product discharge port (512) respectively, an extrusion discharge port (601) provided at one end of the extruder body (604) and capable of discharging a solidified product, and a twin screw (605) provided at the other end of the extruder body (604) and capable of extruding the solidified product, and a fourth reduction motor (606) for providing an extrusion driving force for the twin screw (605); The packaging machine (7) comprises a turntable (701) divided into eight stations; a bag taking mechanism (702) for grabbing a prefabricated bag, a bag opening mechanism (703) capable of fully opening the prefabricated bag, a feeding mechanism (704) aligned with the extrusion outlet (601) on the twin-screw extruder (6) and capable of feeding the solidified product into the prefabricated bag, a counting mechanism (705) for counting the number of prefabricated bags containing the solidified product, a feeding mechanism (706) for pressing the solidified product in the prefabricated bag and exhausting the air in the bag, a first heat sealing mechanism (707) and a second heat sealing mechanism (708) for performing heat sealing twice on the opening of the prefabricated bag, and a cold sealing mechanism (709) for cold sealing the prefabricated bag; The trolley translation mechanism (8) comprises a base plate (801) fixed on the ground, two rails (802) arranged on the base plate and parallel to each other, a moving trolley (803) capable of sliding and sliding on the rails (802), a plurality of blocks (805) arranged at both ends of the rails (802) capable of preventing the moving trolley (803) from sliding off the rails (802), and a fifth reduction motor (806) providing translation driving force to the moving trolley (803) and connected to the moving trolley (803) via a roller chain (804); a waste bucket is placed on the moving trolley (803) for receiving the solidified product after cold packaging; and a lifting mechanism (9) capable of transmitting the solidified product after cold packaging is arranged between the packaging machine (7) and the waste bucket.

7. A low-radioactive waste oil solidification process, characterized in that: Using the mobile solidification device for low-radioactive waste oil as claimed in claim 6 comprises the following steps: S1: starting the waste oil storage system (1) to transfer the waste oil from the outside to the waste oil collection tank (106) through the receiving pipe (105); S2: Open the solenoid valve (107) in the waste oil storage system (1), and deliver 48L of waste oil to the preheating system (4) through the output pipe (108). During the delivery process, the output amount of the waste oil is measured by the output metering pump (109) provided on the output pipe (108); S3: starting the conveying motor (303) in the solid powder adding system (3) to convey the solid powder in batches to the solid powder lower hopper (403) of the preheating system (4) by driving the screw conveyor; S4: starting the preheating system (4), the first heating jacket (406) heats the preheating tank (409) to 90° C., and turning on the second reduction motor (401) to drive the preheating stirring shaft (404) and the stirring paddle (405) to rotate, so that the waste oil and solid powder in the preheating tank (409) are evenly mixed to obtain an oil-powder mixed liquid; the oil-powder mixed liquid is transmitted to the curing system (5) through the oil-powder mixed liquid discharge pipe (408); S5: starting the clean water pump (211) of the alkali solution adding system (2) to convey clean water into the alkali solution storage tank (203), adding solid alkali into the alkali solution hopper (202), and then turning on the first reduction motor (212) to drive the alkali solution stirring shaft (209) to fully mix the clean water and the solid alkali to obtain alkali solution; the alkali solution is conveyed to the curing system (5) through the alkali solution discharge pipe (206) below the alkali solution storage tank (203), and the alkali solution diaphragm metering pump (205) on the alkali solution discharge pipe (206) can meter the output alkali solution; S6: generating a cured product in the curing system; S601: The first reaction kettle (504) and the second reaction kettle (505) are heated to 90°C and kept warm by the second heating jacket (506) in the curing system (5); S602: The oil-powder mixture and the alkali solution enter the second reaction kettle (505) from the oil-powder mixture feed port (503) and the alkali solution feed port (515) respectively; the third reduction motor (510) is turned on to drive the stirrer (514) to rotate the oil-powder mixture and the alkali solution to fully mix and react to obtain a solidified product; S603: After the reaction is finished, the lifting mechanism (507) is started to lift the stirrer (514) to the outside of the second reaction kettle (505), and then the stepping motor (508) in the rotating mechanism is started to drive the rotating body (509) and the rotating shaft (513) to rotate 180 degrees, so that the stirrer (514) and the piston (502) exchange positions; S604: Open the gate valve on the second product discharge port (512), start the electric pressure cylinder (501) to squeeze the piston (502) downward, and squeeze the solidified product in the second reaction kettle (505) to the second feed hole (603) of the twin-screw extruder (6); S605: while step S604 is being carried out, steps S602 to S603 are carried out in the first reaction kettle (504), and the solidified product is extruded to the first feed hole (602) of the twin-screw extruder (6); S606: After step S605 is completed, steps S602 to S605 are repeated in a cycle; S7: Turn on the fourth reduction motor (606) to drive the twin screw (605) to extrude the solidified product, and the solidified product is extruded from the extrusion outlet (601) to the packaging machine (7); S8: Start the packaging machine (7), grab a prefabricated bag at the station corresponding to the bag taking mechanism (702) on the turntable (701), rotate the turntable (701) to the bag opening mechanism (703) to inflate and open the prefabricated bag, and then rotate the turntable (701) to the unloading mechanism (704) to receive the solidified product extruded by the twin-screw extruder (6), and then continue to rotate the turntable (701) to count, press, heat-package for the first time, heat-package for the second time, and cold-package the prefabricated bag containing the solidified product in sequence, and finally the prefabricated bag containing the solidified product is taken down by the bag taking mechanism (702) and falls to the lifting mechanism (9); S9: The lifting mechanism (9) lifts the solidified product and transfers it to the waste bucket on the trolley translation mechanism (8); at the same time, the cycle step S8 continues to package the solidified product.

Images