An automatic emulsification and homogenization pretreatment system and method for radioactive waste lubricating oil and oily waste liquid

Abstract

An automatic emulsification and homogenization pretreatment system for radioactive waste lubricating oil and oil cleaning waste liquid, characterized in that it mainly comprises a PLC control system, a waste lubricating oil storage tank (1), an oil cleaning waste liquid storage tank (2), an emulsifier storage tank (3), a first emulsification stirring tank (4-1) and a second emulsification stirring tank (4-2); the waste lubricating oil enters the waste lubricating oil storage tank (1) through a first conveying pump (5-1), and a first manual emptying valve (9-1) and a first electric valve (8-1) are arranged at the bottom of the waste lubricating oil storage tank (1); a pipeline at the rear end of the first electric valve (8-1) is sequentially provided with a first filter (10-1), a third conveying pump (5-3) and a first flow meter (6-1); the online COD detector detects the COD concentration at regular time intervals and feeds back the PLC control system in time, and the system has the advantages of high degree of automation, good emulsification and homogenization effect, stable concentration, less occupation of manpower and the like.

Description

Technical Field

[0001] This invention relates to an automatic emulsification and homogenization pretreatment system and method for radioactive waste lubricating oil and oily cleaning waste liquid, and specifically to a method for homogenizing waste liquid containing two or more organic substances with a large concentration difference. Technical Background

[0002] Radioactive waste lubricating oil and oily cleaning waste liquid are generated during the operation and maintenance of nuclear reactors and nuclear facilities. Currently, supercritical water oxidation technology is a better method for treating radioactive organic waste liquid. Due to the significant difference in the concentration of organic matter in the two types of waste liquid, when using supercritical water oxidation technology to treat organic waste liquid, it is necessary to first perform emulsification and homogenization pretreatment on these organic waste liquids with large concentration differences. The appropriateness of the degree of homogenization and emulsification directly affects the thermal management process during the operation of the supercritical water oxidation treatment equipment, and thus affects the operational safety and production and operating costs of the equipment. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic emulsification and homogenization pretreatment system for radioactive waste lubricating oil and oil stains, solving the current problem of emulsification and homogenization for the simultaneous treatment of radioactive organic waste liquids with large concentration differences.

[0004] An automated emulsification and homogenization pretreatment system for radioactive waste lubricating oil and oily cleaning waste liquid mainly includes a PLC control system, a waste lubricating oil storage tank 1, an oily cleaning waste liquid storage tank 2, an emulsifier storage tank 3, a first emulsification mixing tank 4-1, and a second emulsification mixing tank 4-2.

[0005] Waste lubricating oil enters waste lubricating oil storage tank 1 through the first transfer pump 5-1. The bottom of waste lubricating oil storage tank 1 is equipped with a first manual vent valve 9-1 and a first electric valve 8-1. The pipeline behind the first electric valve 8-1 is sequentially equipped with a first filter 10-1, a third transfer pump 5-3 and a first flow meter 6-1. The pipeline after the first flow meter 6-1 is divided into two parallel pipelines that enter the first emulsification mixing tank 4-1 and the second emulsification mixing tank 4-2 through the sixth electric valve 8-6 and the seventh electric valve 8-7 respectively.

[0006] The oily cleaning waste liquid enters the oily cleaning waste liquid storage tank 2 through the second transfer pump 5-2. The bottom of the oily cleaning waste liquid storage tank 2 is equipped with a second manual drain valve 9-2 and a third electric valve 8-3. The pipeline behind the third electric valve 8-3 is sequentially equipped with a second filter 10-2, a fourth transfer pump 5-4 and a second flow meter 6-2. The pipeline after the second flow meter 6-2 is divided into two parallel pipelines, which enter the first emulsification mixing tank 4-1 and the second emulsification mixing tank 4-2 through the fourth electric valve 8-4 and the fifth electric valve 8-5 respectively.

[0007] The oily cleaning waste liquid storage tank 2 has an opening in the middle of its body, which is connected to the first online COD detector 11-1 via the second electric valve 8-2;

[0008] The bottom of the emulsifier storage tank 3 is equipped with a fifth manual vent valve 9-5 and a fourteenth electric valve 8-14; the pipeline behind the fourteenth electric valve 8-14 is sequentially equipped with a third filter 10-3, a fifth delivery pump 5-5 and a third flow meter 6-3; the pipeline after the third flow meter 6-3 is divided into two parallel pipelines that pass through the eighth electric valve 8-8 and the ninth electric valve 8-9 respectively and enter the first emulsification mixing tank 4-1 and the second emulsification mixing tank 4-2.

[0009] The bottom of the first emulsifying mixing tank 4-1 and the second emulsifying mixing tank 4-2 are respectively equipped with a third manual vent valve 9-3 and a fourth manual vent valve 9-4; the first emulsifying mixing tank 4-1 has openings at 25% and 60% of its height, respectively, which are connected to the second online COD detector 11-2 through the tenth electric valve 8-10 and the eleventh electric valve 8-11; the second emulsifying mixing tank 4-2 has openings at 25% and 60% of its height, respectively, which are connected to the online COD detector 11-2 through the twelfth electric valve 8-12 and the thirteenth electric valve 8-13.

[0010] Waste lubricating oil storage tank 1, oil stain cleaning waste liquid storage tank 2, first emulsification mixing tank 4-1 and second emulsification mixing tank 4-2 have openings at the top for connecting to the gas collection pipe of the waste gas purification system.

[0011] The waste lubricating oil storage tank 1, the oil stain cleaning waste liquid storage tank 2, and the emulsifier storage tank 3 are all equipped with level gauges and stirring paddles; the first emulsification stirring tank 4-1 and the second emulsification stirring tank 4-2 are equipped with level gauges and high-speed stirring blades;

[0012] The PLC control system is connected to all material conveying pumps, valves, level gauges, flow meters, filters, and online COD analyzers;

[0013] During operation, turn on the system power and control cabinet power, start the system remote PLC control program, and close all manual and electric valves; pump the waste lubricating oil and oil stain cleaning waste liquid to be pretreated into the waste lubricating oil storage tank 1 and the oil stain cleaning waste liquid storage tank 2 through the first transfer pump 5-1 and the second transfer pump 5-2, pour the emulsifier into the emulsifier storage tank 3, and turn on the agitator of each storage tank to stir the materials evenly;

[0014] Open the second electric valve 8-2 to take a sample, use the first online COD detector 11-1 to detect the COD concentration of the oil cleaning waste liquid, and calculate the appropriate mixing concentration of waste lubricating oil and oil cleaning waste liquid.

[0015] Open the third electric valve 8-3 and the fifth electric valve 8-5 of the oil stain cleaning waste liquid storage tank 2, input the volume of the oil stain cleaning waste liquid to be added on the PLC control system, start the fourth transfer pump 5-4, and quantitatively inject the oil stain cleaning waste liquid into the first emulsification mixing tank 4-1; then close the above valves and pumps.

[0016] Open the first electric valve 8-1 and the sixth electric valve 8-6 of the waste lubricating oil storage tank 1, input the volume of waste lubricating oil to be added on the PLC control system, start the third delivery pump 5-3, and quantitatively inject waste lubricating oil into the first emulsification mixing tank 4-1; then close the above valves and pumps.

[0017] Open the eighth electric valve 8-8 and the fourteenth electric valve 8-14 of the emulsifier storage tank 3, input the volume of emulsifier to be added on the PLC control system, start the fifth delivery pump 5-5, and quantitatively inject the emulsifier into the first emulsification mixing tank 4-1; then close the above valves and pumps.

[0018] The emulsifying agitator head of the first emulsifying mixing tank 4-1 is turned on to emulsify and homogenize the material. After a set time, the tenth electric valve 8-10 and the eleventh electric valve 8-11 are turned on to take samples. The average COD concentration of the emulsion is detected by the second online COD detector 11-2. Based on the detection results, the dosage of waste lubricating oil, oil stain cleaning waste liquid and emulsifier is automatically fine-tuned.

[0019] The first emulsifying mixing tank 4-1 and the second emulsifying mixing tank 4-2 are connected in parallel; the emulsification homogenization pretreatment process in the second emulsifying mixing tank 4-2 is the same as the process in the first emulsifying mixing tank 4-1.

[0020] After the material undergoes emulsification and homogenization pretreatment, it enters the processing system. When the material level in the first emulsification mixing tank 4-1 falls below the set value, the PLC control system automatically switches to allow the material in the second emulsification mixing tank 4-2 to enter the processing system. During the pretreatment process, the exhaust gas purification system needs to remain on.

[0021] An automated emulsification and homogenization pretreatment method for radioactive waste lubricating oil and oily cleaning waste liquid using an automated emulsification and homogenization pretreatment system includes the following steps:

[0022] Step 1: Turn on the system power and control cabinet power, start the system remote PLC control program, close all manual and electric valves; turn on all exhaust gas purification systems and keep them on.

[0023] Step 2: Pump the waste lubricating oil and oil stain cleaning waste liquid to be pretreated into the waste lubricating oil storage tank 1 and the oil stain cleaning waste liquid storage tank 2 through the first transfer pump 5-1 and the second transfer pump 5-2. Pour the special emulsifier into the emulsifier storage tank 3. Turn on the agitator of each storage tank to stir the materials evenly.

[0024] Step 3: Open the second electric valve 8-2 and take a sample from the second electric valve 8-2. Use the first online COD detector 11-1 to detect the COD concentration of the sampled oil cleaning waste liquid and calculate the appropriate mixing concentration of waste lubricating oil and oil cleaning waste liquid.

[0025] Step 4: Open the third electric valve 8-3 and the fifth electric valve 8-5 of the oil stain cleaning waste liquid storage tank. Input the volume of oil stain cleaning waste liquid to be added on the PLC control system. Turn on the fourth transfer pump 5-4 and quantitatively inject the oil stain cleaning waste liquid into the first emulsification mixing tank 4-1. Then close the fourth transfer pump 5-4, the third electric valve 8-3, and the fifth electric valve 8-5.

[0026] Step 5: Open the first electric valve 8-1 and the sixth electric valve 8-6 of the waste lubricating oil storage tank 1, input the volume of waste lubricating oil to be added on the PLC control system, turn on the third transfer pump 5-3, and quantitatively inject waste lubricating oil into the first emulsification mixing tank 4-1. Then, close the third transfer pump 5-3, the first electric valve 8-1 and the sixth electric valve 8-6.

[0027] Step 6: Open the eighth electric valve 8-8 and the fourteenth electric valve 8-14 of the emulsifier storage tank, input the volume of emulsifier to be added on the PLC control system, turn on the fifth delivery pump 5-5, and quantitatively inject the emulsifier into the first emulsification mixing tank 4-1. Then close the fifth delivery pump 5-5, the eighth electric valve 8-8, and the fourteenth electric valve 8-14.

[0028] Step 7: Turn on the emulsification stirring head of the first emulsification mixing tank 4-1 to emulsify and homogenize the material. After the set time, turn on the tenth electric valve 8-10 and the eleventh electric valve 8-11 respectively, and take samples from the tenth electric valve 8-10 and the eleventh electric valve 8-11. Use the second online COD detector 11-2 to detect the average COD concentration of the sampled emulsion. Based on the detection results, automatically fine-tune the dosage of waste lubricating oil, oil stain cleaning waste liquid and emulsifier.

[0029] Step 8: The first emulsifying mixing tank 4-1 and the second emulsifying mixing tank 4-2 are connected in parallel. The emulsification homogenization pretreatment process in the second emulsifying mixing tank 4-2 is the same as the process in the first emulsifying mixing tank 4-1.

[0030] Step 9: The material after emulsification and homogenization pretreatment enters the processing system; after the material level in the first emulsification mixing tank 4-1 is lower than the set value, the PLC control system automatically switches to allow the material in the second emulsification mixing tank 4-2 to enter the processing system.

[0031] Beneficial effects of the invention

[0032] In this invention, the PLC control system precisely controls the flow rates of waste lubricating oil, cleaning waste liquid, and emulsifier through calculation. At the same time, it monitors the liquid levels in the waste lubricating oil storage tank, cleaning waste liquid storage tank, emulsifier storage tank, and emulsification mixing tank in real time through level gauges. The online COD detector periodically detects the COD concentration and provides timely feedback to the PLC control system. It has the advantages of high automation, good emulsification homogenization effect, stable concentration, and low manual labor. Attached Figure Description

[0033] Figure 1 This is a process flow diagram of the present invention;

[0034] Figure 2 This is a diagram of the preprocessing system equipment of the present invention.

[0035] Among them, 1 is a waste lubricating oil storage tank, 2 is an oil stain cleaning waste liquid storage tank, 3 is an emulsifier storage tank, 4 is an emulsification mixing tank, 5 is a material conveying pump, 6 is a flow meter, 7 is a level gauge, 8 is an electric valve, 9 is a manual valve, 10 is a pipeline filter, and 11 is an online COD detector.

[0036] 2-2 is a spare oil-washing wastewater storage tank; 4-1 is the first emulsification mixing tank; 4-2 is the second emulsification mixing tank; 5-1 is the first transfer pump; 5-2 is the second transfer pump; 5-3 is the third transfer pump; 5-4 is the fourth transfer pump; 5-5 is the fifth transfer pump; 6-1 is the first flow meter; 6-2 is the second flow meter; 6-3 is the third flow meter; 7-1 is the first level gauge; 7-2 is the second level gauge; 7-3 is the third level gauge; 7-4 is the fourth level gauge; 7-5 is the fifth level gauge; 8-1 is the first electric valve; 8-2 is the second electric valve; 8-3 is the third electric valve; 8-4 is the fourth electric valve; 8-5 is the fifth electric valve; 8-6 is the sixth electric valve. Valves: 8-7 is the seventh electric valve, 8-8 is the eighth electric valve, 8-9 is the ninth electric valve, 8-10 is the tenth electric valve, 8-11 is the eleventh electric valve, 8-12 is the twelfth electric valve, 8-13 is the thirteenth electric valve, 8-14 is the fourteenth electric valve, 9-1 is the first manual vent valve, 9-2 is the second manual vent valve, 9-3 is the third manual vent valve, 9-4 is the fourth manual vent valve, 9-5 is the fifth manual vent valve, 10-1 is the first filter, 10-2 is the second filter, 10-3 is the third filter, 11-1 is the first online COD detector, and 11-2 is the second online COD detector. Detailed Implementation

[0037] An automatic emulsification and homogenization pretreatment system for radioactive waste lubricating oil and oily cleaning waste liquid includes a PLC control system, waste lubricating oil storage tank, oily cleaning waste liquid storage tank, emulsifier storage tank, emulsification mixing tank, material conveying pump, valves, level gauge, flow meter, filter, conveying pipeline, online COD detector, etc.

[0038] The waste lubricating oil storage tank, oil stain cleaning waste liquid storage tank, emulsifier storage tank, and emulsifying mixing tank are all equipped with level gauges. Each of the waste lubricating oil storage tank, oil stain cleaning waste liquid storage tank, and emulsifier storage tank has two openings at the bottom for connecting a drain pipe and an inlet pipe to the emulsifying mixing tank, respectively. All of the waste lubricating oil storage tank, oil stain cleaning waste liquid storage tank, and emulsifier storage tank have a stirring function. The top of each of the waste lubricating oil storage tank, oil stain cleaning waste liquid storage tank, and emulsifying mixing tank is equipped with a waste gas purification system collection pipe.

[0039] The inlet of the waste lubricating oil, oily cleaning waste liquid, and emulsifier transfer pump is equipped with an electric valve and a pipeline filter, and a flow meter is installed on the connecting pipeline between the transfer pump outlet and the inlet of the emulsification mixing tank. The oily cleaning waste liquid storage tank has an opening in the middle connected to an electric sampling valve and a low-range online COD detector.

[0040] The emulsifying mixing tank uses a high-speed shearing mixing head; the top is equipped with feed pipes for waste lubricating oil, oily cleaning waste liquid, and emulsifier. Electric valves are installed before each feed inlet of the emulsifying mixing tank. Two openings are made at the bottom of the tank, one for connecting to an empty pipe and the other for connecting to the supercritical system; holes are made at 25% and 60% of the tank height for connecting electric sampling valves and a high-range online COD analyzer.

[0041] The waste lubricating oil, oily cleaning waste liquid, and emulsifier transfer pumps adopt variable frequency speed control. The PLC control system is electrically connected to the tank agitator, transfer pumps, electric valves, level gauges, flow meters, and online COD analyzers.

[0042] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] like Figure 1 As shown, the automatic emulsification and homogenization pretreatment system for radioactive waste lubricating oil and oily cleaning waste liquid from nuclear reactors in this embodiment includes a PLC control system, waste lubricating oil storage tank 1, oily cleaning waste liquid storage tank 2, emulsifier storage tank 3, emulsification mixing tanks 4-1 and 4-2, five material conveying pumps 5-1 to 5-5, three flow meters 6-1 to 6-3, five level gauges 7-1 to 7-5, thirteen electric valves 8-1 to 8-13, five manual drain valves 9-1 to 9-5, three pipeline filters 10-1 to 10-3, two online COD detectors with different ranges 11-1 and 11-2, and conveying pipelines, etc.

[0044] I. System Connection Instructions

[0045] Waste lubricating oil enters waste lubricating oil storage tank 1 via the first transfer pump 5-1. The bottom of waste lubricating oil storage tank 1 is equipped with a first manual vent valve 9-1 and a first electric valve 8-1. The pipeline downstream of the first electric valve 8-1 is sequentially equipped with a first filter 10-1, a third transfer pump 5-3, and a first flow meter 6-1. The pipeline after the first flow meter 6-1 splits into two parallel pipelines, which respectively pass through a sixth electric valve 8-6 and a seventh electric valve 8-7, entering the first emulsification mixing tank 4-1 and the second emulsification mixing tank 4-2.

[0046] Oily cleaning wastewater enters oily cleaning wastewater storage tank 2 via the second transfer pump 5-2. The bottom of oily cleaning wastewater storage tank 2 is equipped with a second manual drain valve 9-2 and a third electric valve 8-3. The pipeline downstream of the third electric valve 8-3 is sequentially connected to a second filter 10-2, a fourth transfer pump 5-4, and a second flow meter 6-2. The pipeline after the second flow meter 6-2 splits into two parallel pipelines, which respectively pass through the fourth electric valve 8-4 and the fifth electric valve 8-5, entering the first emulsification mixing tank 4-1 and the second emulsification mixing tank 4-2.

[0047] The oily waste liquid storage tank 2 has an opening in the middle of its body, which is connected to the first online COD detector 11-1 via the second electric valve 8-2.

[0048] The bottom of emulsifier storage tank 3 is equipped with a fifth manual vent valve 9-5 and a fourteenth electric valve 8-14. The pipeline downstream of the fourteenth electric valve 8-14 is sequentially equipped with a third filter 10-3, a fifth transfer pump 5-5, and a third flow meter 6-3. The pipeline after the third flow meter 6-3 splits into two parallel pipelines, which pass through the eighth electric valve 8-8 and the eighth electric valve 8-9 respectively, entering the first emulsification mixing tank 4-1 and the second emulsification mixing tank 4-2.

[0049] The bottom of the first emulsifying mixing tank 4-1 is equipped with a third manual vent valve 9-3, and the bottom of the second emulsifying mixing tank is equipped with a fourth manual vent valve 9-4. The first emulsifying mixing tank 4-1 has openings at 25% and 60% of its height, respectively, which connect to the second online COD analyzer 11-2 via tenth electric valve 8-10 and eleventh electric valve 8-11. The second emulsifying mixing tank 4-2 has openings at 25% and 60% of its height, respectively, which connect to the second online COD analyzer 11-2 via twelfth electric valve 8-12 and thirteenth electric valve 8-13.

[0050] Waste lubricating oil storage tank 1, oil stain cleaning waste liquid storage tank 2, first emulsification mixing tank 4-1 and second emulsification mixing tank 4-2 have openings at the top for connecting to the gas collection pipe of the waste gas purification system.

[0051] The waste lubricating oil storage tank 1, the oil stain cleaning waste liquid storage tank 2, and the emulsifier storage tank 3 are all equipped with level gauges and stirring paddles. The first emulsification stirring tank 4-1 and the second emulsification stirring tank 4-2 are equipped with level gauges and high-speed stirring blades.

[0052] Example:

[0053] The process of this invention is as follows:

[0054] (1) Turn on the system power and control cabinet power, start the system remote PLC control program, and close all manual and electric valves.

[0055] (2) The waste lubricating oil and oil stain cleaning waste liquid to be pretreated are pumped into the waste lubricating oil storage tank 1 and the oil stain cleaning waste liquid storage tank 2 through the first transfer pump 5-1 and the second transfer pump 5-2. The special emulsifier is poured into the emulsifier storage tank 3. The agitators of each storage tank are turned on to stir the materials evenly.

[0056] (3) Open the second electric valve 8-2 and take a sample from the second electric valve 8-2. Use the first online COD detector 11-1 to detect the COD concentration of the oil cleaning waste liquid and calculate the appropriate mixing concentration of waste lubricating oil and oil cleaning waste liquid.

[0057] (4) Open the third electric valve 8-3 and the fifth electric valve 8-5 of the oil stain cleaning waste liquid storage tank, input the volume of the oil stain cleaning waste liquid to be added on the PLC control system, start the fourth transfer pump 5-4, and quantitatively inject the oil stain cleaning waste liquid into the first emulsifying mixing tank 4-1. Close the above pumps and valves.

[0058] (5) Open the first electric valve 8-1 and the sixth electric valve 8-6 of the waste lubricating oil storage tank, input the volume of waste lubricating oil to be added on the PLC control system, start the third transfer pump 5-3, and quantitatively inject waste lubricating oil into the first emulsification mixing tank 4-1. Close the above pumps and valves.

[0059] (6) Open the eighth electric valve 8-8 and the fourteenth electric valve 8-14 of the emulsifier storage tank, input the volume of the emulsifier to be added on the PLC control system, start the fifth delivery pump 5-5, and quantitatively inject the emulsifier into the first emulsification mixing tank 4-1. Close the above pumps and valves.

[0060] (7) Turn on the emulsifying agitator of the first emulsifying mixing tank 4-1 to emulsify and homogenize the materials. After a certain period of time, turn on the tenth electric valve 8-10 and the eleventh electric valve 8-11 respectively, and use the second online COD detector 11-2 to detect the average COD concentration of the emulsion. Based on the detection results, automatically fine-tune the dosage of waste lubricating oil, oil stain cleaning waste liquid and emulsifier.

[0061] (8) The first emulsifying mixing tank 4-1 and the second emulsifying mixing tank 4-2 are connected in parallel. The emulsification homogenization pretreatment process in the second emulsifying mixing tank 4-2 is similar to the process in the emulsifying mixing tank 4-1.

[0062] (9) The material after emulsification and homogenization pretreatment enters the processing system. When the liquid level of the material in the first emulsification mixing tank 4-1 is lower than a certain value, the PLC control system automatically switches to allow the material in the second emulsification mixing tank 4-2 to enter the processing system.

[0063] (10) During the pretreatment process, the exhaust gas purification system needs to be kept on.

[0064] Specific Implementation Cases

[0065] like Figure 2As shown, this embodiment is an automatic emulsification and homogenization pretreatment device for a supercritical water oxidation system for treating radioactive waste lubricating oil and oily cleaning waste liquid from a nuclear reactor. It includes a waste lubricating oil storage tank 1, a first oily cleaning waste liquid storage tank 2-1, a spare oily cleaning waste liquid storage tank 2-2, an emulsifier storage tank 3, a first emulsification mixing tank 4-1 and a second emulsification mixing tank 4-2, a first conveying pump 5-1 for feeding waste lubricating oil, a second conveying pump 5-2 for feeding oily cleaning waste liquid, a third conveying pump 5-3 for waste lubricating oil, a fourth conveying pump 5-4 for oily cleaning waste liquid, a fifth conveying pump 5-5 for emulsifier, a first flow meter 6-1 for waste lubricating oil, a second flow meter 6-2 for oily cleaning waste liquid, a third flow meter 6-3 for emulsifier, and seven level gauges 7-1 to 7-5 (located at the bottom of each material tank). Figure 2 (Not marked in the text) The corresponding electric valves 8-1~8-9, six manual drain valves 9-1~9-6, waste lubricating oil pipeline filter 10-1, oil stain cleaning waste liquid pipeline filter 10-2, emulsifier pipeline filter 10-3, clean water tank 12, and conveying pipelines, etc., and two online COD detectors 11-1~11-2 are located near the PLC control cabinet, not in Figure 2 It is marked in the middle.

[0066] The automated emulsification and homogenization pretreatment unit is designed as a skid-mounted unit for easy transportation and loading / unloading. The unit is PLC-controlled and includes a control and power cable transfer box. Quick-connect connectors allow for rapid connection between this transfer box and the control and electrical cabinets of the supercritical water oxidation system, facilitating quick assembly of the entire emulsification and batching unit with the supercritical water oxidation system. Furthermore, the unit can be remotely operated and can perform automated emulsification and batching according to a pre-programmed sequence.

[0067] The skid-mounted emulsification homogenization pretreatment device is equipped with a liquid receiving tray and an empty pump at the bottom. In case of leakage during the batching process, the leaked waste liquid can be collected and transported back to the oil cleaning waste liquid storage tank through the empty pump, so as to realize the organized collection and discharge of materials in the pretreatment process and avoid material pollution to the environment.

Claims

1. An automated emulsification and homogenization pretreatment system for radioactive waste lubricating oil and oily cleaning waste liquid, characterized in that, It mainly includes a PLC control system, a waste lubricating oil storage tank (1), an oil stain cleaning waste liquid storage tank (2), an emulsifier storage tank (3), a first emulsification mixing tank (4-1), and a second emulsification mixing tank (4-2), among which, Waste lubricating oil enters the waste lubricating oil storage tank (1) through the first transfer pump (5-1). The bottom of the waste lubricating oil storage tank (1) is equipped with a first manual vent valve (9-1) and a first electric valve (8-1). The pipeline behind the first electric valve (8-1) is sequentially equipped with a first filter (10-1), a third transfer pump (5-3), and a first flow meter (6-1). The pipeline after the first flow meter (6-1) is divided into two parallel pipelines that enter the first emulsification mixing tank (4-1) and the second emulsification mixing tank (4-2) through the sixth electric valve (8-6) and the seventh electric valve (8-7), respectively. The oily cleaning waste liquid enters the oily cleaning waste liquid storage tank (2) through the second transfer pump (5-2). The bottom of the oily cleaning waste liquid storage tank (2) is equipped with a second manual drain valve (9-2) and a third electric valve (8-3). The pipeline behind the third electric valve (8-3) is sequentially equipped with a second filter (10-2), a fourth transfer pump (5-4), and a second flow meter (6-2). The pipeline after the second flow meter (6-2) is divided into two parallel pipelines, which enter the first emulsification mixing tank (4-1) and the second emulsification mixing tank (4-2) through the fourth electric valve (8-4) and the fifth electric valve (8-5), respectively. The oil stain cleaning waste liquid storage tank (2) has an opening in the middle of the tank body that connects to the first online COD detector (11-1) through the second electric valve (8-2); The bottom of the emulsifier storage tank (3) is equipped with a fifth manual drain valve (9-5) and a fourteenth electric valve (8-14); the pipeline behind the fourteenth electric valve (8-14) is sequentially equipped with a third filter (10-3), a fifth transfer pump (5-5) and a third flow meter (6-3); the pipeline after the third flow meter (6-3) is divided into two parallel pipelines that pass through the eighth electric valve (8-8) and the ninth electric valve (8-9) respectively and enter the first emulsification mixing tank (4-1) and the second emulsification mixing tank (4-2); The bottom of the first emulsifying mixing tank (4-1) and the second emulsifying mixing tank (4-2) are respectively equipped with a third manual vent valve (9-3) and a fourth manual vent valve (9-4); the first emulsifying mixing tank (4-1) has openings at 25% and 60% of its tank height, respectively, which are connected to the second online COD detector (11-2) through the tenth electric valve (8-10) and the eleventh electric valve (8-11); the second emulsifying mixing tank (4-2) has openings at 25% and 60% of its tank height, respectively, which are connected to the online COD detector (11-2) through the twelfth electric valve (8-12) and the thirteenth electric valve (8-13). The waste lubricating oil storage tank (1), the oil stain cleaning waste liquid storage tank (2), the first emulsification mixing tank (4-1) and the second emulsification mixing tank (4-2) have openings at the top to connect to the gas collection pipe of the waste gas purification system; The waste lubricating oil storage tank (1), the oil stain cleaning waste liquid storage tank (2) and the emulsifier storage tank (3) are all equipped with level gauges and stirring paddles; the first emulsification stirring tank (4-1) and the second emulsification stirring tank (4-2) are equipped with level gauges and high-speed stirring blades; The PLC control system is connected to all material conveying pumps, valves, level gauges, flow meters, filters, and online COD analyzers; When working, turn on the system power and control cabinet power, start the system remote PLC control program, and close all manual and electric valves; pump the waste lubricating oil and oil stain cleaning waste liquid to be pretreated into the waste lubricating oil storage tank (1) and the oil stain cleaning waste liquid storage tank (2) through the first transfer pump (5-1) and the second transfer pump (5-2), pour the emulsifier into the emulsifier storage tank (3), and turn on the stirring paddle of each storage tank to stir the materials evenly; Open the second electric valve (8-2) to take a sample, and use the first online COD detector (11-1) to detect the COD concentration of the oil cleaning waste liquid, and calculate the appropriate mixing concentration of waste lubricating oil and oil cleaning waste liquid. Open the third electric valve (8-3) and the fifth electric valve (8-5) of the oil stain cleaning waste liquid storage tank (2), input the volume of the oil stain cleaning waste liquid to be added on the PLC control system, turn on the fourth transfer pump (5-4), and quantitatively inject the oil stain cleaning waste liquid into the first emulsification mixing tank (4-1); then close the above valves and pumps. Open the first electric valve (8-1) and the sixth electric valve (8-6) of the waste lubricating oil storage tank (1), input the volume of waste lubricating oil to be added on the PLC control system, turn on the third transfer pump (5-3), and quantitatively inject waste lubricating oil into the first emulsification mixing tank (4-1); then close the above valves and pumps. Open the eighth electric valve (8-8) and the fourteenth electric valve (8-14) of the emulsifier storage tank (3), input the volume of the emulsifier to be added on the PLC control system, turn on the fifth delivery pump (5-5), and quantitatively inject the emulsifier into the first emulsification mixing tank (4-1); then close the above valves and pumps. The emulsifying agitator head of the first emulsifying mixing tank (4-1) is turned on to emulsify and homogenize the material. After a set time, the tenth electric valve (8-10) and the eleventh electric valve (8-11) are turned on to take samples. The average COD concentration of the emulsion is detected by the second online COD detector (11-2). Based on the detection results, the dosage of waste lubricating oil, oil stain cleaning waste liquid and emulsifier is automatically fine-tuned. The first emulsifying mixing tank (4-1) and the second emulsifying mixing tank (4-2) are connected in parallel; the emulsification homogenization pretreatment process in the second emulsifying mixing tank (4-2) is the same as the process in the first emulsifying mixing tank (4-1); After the material is pretreated by emulsification and homogenization, it enters the processing system. When the liquid level of the material in the first emulsification mixing tank (4-1) is lower than the set value, the PLC control system automatically switches to the material in the second emulsification mixing tank (4-2) to enter the processing system. During the pretreatment process, the exhaust gas purification system needs to be kept on.

2. The automatic emulsification and homogenization pretreatment method for radioactive waste lubricating oil and oily cleaning waste liquid using the automatic emulsification and homogenization pretreatment system for radioactive waste lubricating oil and oily cleaning waste liquid as described in claim 1, characterized in that, Includes the following steps: Step 1: Turn on the system power and control cabinet power, start the system remote PLC control program, close all manual and electric valves; turn on all exhaust gas purification systems and keep them on. Step 2: Pump the waste lubricating oil and oil stain cleaning waste liquid to be pretreated into the waste lubricating oil storage tank (1) and the oil stain cleaning waste liquid storage tank (2) through the first transfer pump (5-1) and the second transfer pump (5-2), and pour the special emulsifier into the emulsifier storage tank (3); turn on the stirring paddle of each storage tank to stir the materials evenly. Step 3: Open the second electric valve (8-2) and take a sample from the second electric valve (8-2). Use the first online COD detector (11-1) to detect the COD concentration of the sampled oil cleaning waste liquid and calculate the appropriate mixing concentration of waste lubricating oil and oil cleaning waste liquid. Step 4: Open the third electric valve (8-3) and the fifth electric valve (8-5) of the oil stain cleaning waste liquid storage tank. Input the volume of oil stain cleaning waste liquid to be added on the PLC control system. Turn on the fourth transfer pump (5-4) and inject the oil stain cleaning waste liquid into the first emulsification mixing tank (4-1) in a metered manner. Then, close the fourth transfer pump (5-4), the third electric valve (8-3), and the fifth electric valve (8-5). Step 5: Open the first electric valve (8-1) and the sixth electric valve (8-6) of the waste lubricating oil storage tank 1, input the volume of waste lubricating oil to be added on the PLC control system, turn on the third transfer pump (5-3), inject the waste lubricating oil into the first emulsification mixing tank (4-1) in a metered manner, and close the third transfer pump (5-3), the first electric valve (8-1) and the sixth electric valve (8-6). Step 6: Open the eighth electric valve (8-8) and the fourteenth electric valve (8-14) of the emulsifier storage tank, input the volume of emulsifier to be added on the PLC control system, turn on the fifth delivery pump (5-5), and quantitatively inject the emulsifier into the first emulsification mixing tank (4-1). Then close the fifth delivery pump (5-5), the eighth electric valve (8-8), and the fourteenth electric valve (8-14). Step 7: Turn on the emulsification stirring head of the first emulsification mixing tank (4-1) to emulsify and homogenize the material. After the set time, turn on the tenth electric valve (8-10) and the eleventh electric valve (8-11) respectively, and take samples from the tenth electric valve (8-10) and the eleventh electric valve (8-11). Use the second online COD detector (11-2) to detect the average COD concentration of the sampled emulsion. Based on the detection results, automatically fine-tune the dosage of waste lubricating oil, oil stain cleaning waste liquid and emulsifier. Step 8: The first emulsifying mixing tank (4-1) and the second emulsifying mixing tank (4-2) are connected in parallel. The emulsification homogenization pretreatment process in the second emulsifying mixing tank (4-2) is the same as the process in the first emulsifying mixing tank (4-1). Step 9: The material after emulsification and homogenization pretreatment enters the processing system; after the material level in the first emulsification mixing tank (4-1) is lower than the set value, the PLC control system automatically switches to the material in the second emulsification mixing tank (4-2) to enter the processing system.

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