CN-117160268-B - Automatic emulsification homogenizing pretreatment system and method for radioactive waste lubricating oil and greasy dirt cleaning waste liquid

Abstract

The automatic emulsification homogenizing pretreatment system for the radioactive waste lubricating oil and the greasy dirt cleaning waste liquid is characterized by mainly comprising a PLC control system, a waste lubricating oil storage tank (1), a greasy dirt cleaning waste liquid storage tank (2), an emulsifying agent storage tank (3), a first emulsification stirring tank (4-1) and a second emulsification stirring tank (4-2), wherein the waste lubricating oil enters the waste lubricating oil storage tank (1) through a first conveying pump (5-1), 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 first filter (10-1), a third conveying pump (5-3) and a first flowmeter (6-1) are sequentially arranged at the rear end pipeline of the first electric valve (8-1), and the online COD detector is used for detecting the COD concentration at regular time and feeding back the PLC control system in time and has the advantages of high automation degree, good emulsification homogenizing effect, stable concentration, few manual occupation and the like.

Inventors

• ZHANG YUE
• WANG XIAOLE

Assignees

• 北京新风航天装备有限公司

Dates

Publication Date

20260512

Application Date

20231023

Claims (2)

1. 1. An automatic emulsification homogenizing pretreatment system for radioactive waste lubricating oil and oil stain cleaning waste liquid is characterized by mainly comprising a PLC control system, a waste lubricating oil storage tank (1), an oil stain cleaning waste liquid storage tank (2), an emulsifying agent storage tank (3), a first emulsification stirring tank (4-1) and a second emulsification stirring tank (4-2), wherein, The waste lubricating oil enters a waste lubricating oil storage tank (1) through a first delivery pump (5-1), 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 first filter (10-1), a third delivery pump (5-3) and a first flowmeter (6-1) are sequentially arranged on a pipeline at the rear end of the first electric valve (8-1), the pipeline behind the first flowmeter (6-1) is divided into two paths of parallel pipelines, and the two paths of parallel pipelines enter a first emulsifying stirring tank (4-1) and a second emulsifying stirring tank (4-2) through a sixth electric valve (8-6) and a seventh electric valve (8-7) respectively; The oil stain cleaning waste liquid enters an oil stain cleaning waste liquid storage tank (2) through a second conveying pump (5-2), a second manual emptying valve (9-2) and a third electric valve (8-3) are arranged at the bottom of the oil stain cleaning waste liquid storage tank (2), a second filter (10-2), a fourth conveying pump (5-4) and a second flowmeter (6-2) are sequentially arranged on a pipeline at the rear end of the third electric valve (8-3), and the second flowmeter (6-2) is divided into two paths which are respectively connected in parallel and enter a first emulsifying stirring tank (4-1) and a second emulsifying stirring tank (4-2) through the fourth electric valve (8-4) and a fifth electric valve (8-5); The middle opening of the tank body of the oil stain cleaning waste liquid storage tank (2) is connected with a first online COD detector (11-1) through a second electric valve (8-2); A fifth manual emptying valve (9-5) and a fourteenth electric valve (8-14) are arranged at the bottom of the emulsifier storage tank (3), a third filter (10-3), a fifth conveying pump (5-5) and a third flowmeter (6-3) are sequentially arranged at the rear end pipeline of the fourteenth electric valve (8-14), the pipeline behind the third flowmeter (6-3) is divided into two paths of parallel pipelines, and the two paths of parallel pipelines enter the first emulsifying stirring tank (4-1) and the second emulsifying stirring tank (4-2) through the eighth electric valve (8-8) and the ninth electric valve (8-9) respectively; The bottoms of the first emulsifying stirring tank (4-1) and the second emulsifying stirring tank (4-2) are respectively provided with a third manual emptying valve (9-3) and a fourth manual emptying valve (9-4), 25% and 60% of the tank body height of the first emulsifying stirring tank (4-1) are respectively provided with holes through a tenth electric valve (8-10) and an eleventh electric valve (8-11) and are connected with a second online COD detector (11-2), and 25% and 60% of the tank body height of the second emulsifying stirring tank (4-2) are respectively provided with holes through a twelfth electric valve (8-12) and a thirteenth electric valve (8-13) and are connected with the online COD detector (11-2); The top openings of the waste lubricating oil storage tank (1), the oil stain cleaning waste liquid storage tank (2), the first emulsifying and stirring tank (4-1) and the second emulsifying and stirring tank (4-2) are connected with a gas collecting pipeline of the waste gas purification system; The oil stain cleaning waste liquid storage tank (2) and the emulsifier storage tank (3) are respectively provided with a liquid level meter and a stirring paddle, and the first emulsifying stirring tank (4-1) and the second emulsifying stirring tank (4-2) are internally provided with a liquid level meter and a high-speed stirring tool bit; The PLC control system is connected with all material conveying pumps, valves, liquid level meters, flow meters, filters and online COD detectors; When the system is in operation, a system power supply and a control cabinet power supply are turned on, a remote PLC control program of the system is started, all manual and electric valves are closed, waste lubricating oil and oil stain cleaning waste liquid to be pretreated are pumped into a waste lubricating oil storage tank (1) and an oil stain cleaning waste liquid storage tank (2) through a first conveying pump (5-1) and a second conveying pump (5-2), an emulsifying agent is poured into the emulsifying agent storage tank (3), and each storage tank stirring paddle is respectively started to stir materials uniformly; Opening a second electric valve (8-2) to sample, detecting the COD concentration of the oil stain cleaning waste liquid by using a first online COD detector (11-1), and calculating the proper compatibility concentration of the waste lubricating oil and the oil stain cleaning waste liquid; Opening a third electric valve (8-3) and a fifth electric valve (8-5) of the oil stain cleaning waste liquid storage tank (2), inputting the volume of the oil stain cleaning waste liquid to be thrown into a PLC control system, opening a fourth conveying pump (5-4), quantitatively injecting the oil stain cleaning waste liquid into a first emulsifying stirring tank (4-1), and then closing the valves and the pumps; Opening a first electric valve (8-1) and a sixth electric valve (8-6) of the waste lubricating oil storage tank (1), inputting the volume of the waste lubricating oil to be added into a PLC control system, opening a third conveying pump (5-3), quantitatively injecting the waste lubricating oil into the first emulsifying stirring tank (4-1), and then closing the valves and the pumps; Opening an eighth electric valve (8-8) and a fourteenth electric valve (8-14) of the emulsifier storage tank (3), inputting the volume of the emulsifier to be added into a PLC control system, opening a fifth conveying pump (5-5), quantitatively injecting the emulsifier into the first emulsifying stirring tank (4-1), and then closing the valves and the pumps; Starting an emulsifying stirring tool bit of a first emulsifying stirring tank (4-1) to carry out material emulsifying homogenization, respectively starting a tenth electric valve (8-10) and an eleventh electric valve (8-11) to sample after a set time, and detecting the average COD concentration of the emulsion by using a second online COD detector (11-2); The first emulsifying stirring tank (4-1) and the second emulsifying stirring tank (4-2) are in a parallel mode, and the emulsifying homogenization pretreatment process in the second emulsifying stirring tank (4-2) is the same as that in the first emulsifying stirring tank (4-1); After the material subjected to emulsification homogenization pretreatment enters a treatment system, after the material liquid level in a first emulsification stirring tank (4-1) is lower than a set value, a PLC control system is automatically switched to a second emulsification stirring tank (4-2) to enter the treatment system, and in the pretreatment process, the waste gas purification system always needs to be kept in an open state.
2. 2. An automatic emulsification homogenizing pretreatment method for cleaning radioactive waste lubricating oil and greasy dirt by using an automatic emulsification homogenizing pretreatment system for cleaning radioactive waste lubricating oil and greasy dirt according to claim 1, which is characterized by comprising the following steps: step one, turning on a system power supply and a control cabinet power supply, starting a system remote PLC control program, closing all manual and electric valves, turning on all waste gas purification systems, and keeping the on state all the time; Pumping the waste lubricating oil to be pretreated and the oil stain cleaning waste liquid into a waste lubricating oil storage tank (1) and an oil stain cleaning waste liquid storage tank (2) through a first conveying pump (5-1) and a second conveying pump (5-2), pouring a special emulsifier into the emulsifier storage tank (3), and respectively starting stirring paddles of the storage tanks to stir the materials uniformly; Step three, opening a second electric valve (8-2), sampling from the second electric valve (8-2), detecting the COD concentration of the sampled oil stain cleaning waste liquid by using a first online COD detector (11-1), and calculating the proper compatibility concentration of the waste lubricating oil and the oil stain cleaning waste liquid; step four, opening a third electric valve (8-3) and a fifth electric valve (8-5) of the oil stain cleaning waste liquid storage tank, inputting the volume number of the oil stain cleaning waste liquid to be added on a PLC control system, opening a fourth conveying pump (5-4), quantitatively injecting the oil stain cleaning waste liquid into a first emulsifying stirring tank (4-1), and closing the fourth conveying pump (5-4), the third electric valve (8-3) and the fifth electric valve (8-5); Step five, a first electric valve (8-1) and a sixth electric valve (8-6) of the waste lubricating oil storage tank 1 are opened, the volume number of the waste lubricating oil to be added is input on a PLC control system, a third conveying pump (5-3) is opened, the waste lubricating oil is quantitatively injected into the first emulsifying stirring tank (4-1), and the third conveying pump (5-3), the first electric valve (8-1) and the sixth electric valve (8-6) are closed; Step six, opening an eighth electric valve (8-8) and a fourteenth electric valve (8-14) of the emulsifier storage tank, inputting the volume number of the emulsifier to be added on a PLC control system, opening a fifth conveying pump (5-5), quantitatively injecting the emulsifier into the first emulsifying stirring tank (4-1), and then closing the fifth conveying pump (5-5), the eighth electric valve (8-8) and the fourteenth electric valve (8-14); Step seven, starting an emulsifying stirring tool bit of the first emulsifying stirring tank 4-1 to carry out material emulsifying homogenization, respectively starting a tenth electric valve (8-10) and an eleventh electric valve (8-11) after a set time, sampling from the tenth electric valve (8-10) and the eleventh electric valve (8-11), detecting the average COD concentration of the sampled emulsion by using a second online COD detector (11-2), and carrying out automatic fine adjustment control on the addition amount of waste lubricating oil, greasy dirt cleaning waste liquid and emulsifying agent according to the detection result; step eight, the first emulsifying stirring tank (4-1) and the second emulsifying stirring tank (4-2) are in a parallel mode, and the emulsifying homogenization pretreatment process in the second emulsifying stirring tank (4-2) is the same as that in the first emulsifying stirring tank (4-1); and step nine, feeding the materials subjected to emulsification homogenization pretreatment into a treatment system, wherein after the liquid level of the materials in the first emulsification stirring tank (4-1) is lower than a set value, the PLC control system is automatically switched into the materials in the second emulsification stirring tank (4-2) to enter the treatment system.

Description

Automatic emulsification homogenizing pretreatment system and method for radioactive waste lubricating oil and greasy dirt cleaning waste liquid Technical Field The invention relates to an automatic emulsification homogenizing pretreatment system and method for radioactive waste lubricating oil and oil stain cleaning waste liquid, which relate to the field of radioactive organic waste liquid pretreatment, in particular to a method for homogenizing two or more waste liquid with large concentration difference of organic matters. Technical Field Radioactive waste lubricating oil and oil-containing waste cleaning liquid are generated in the operation and maintenance processes of nuclear reactors and nuclear facilities. At present, the supercritical water oxidation technology is a better method for treating radioactive organic waste liquid. Because the concentration difference of organic matters contained in the two waste liquids is extremely large, when the supercritical water oxidation technology is utilized to treat the organic waste liquids, firstly, emulsification and homogenization pretreatment is needed to be carried out on the organic waste liquids with large concentration difference, and whether the homogenization and emulsification degree of the organic waste liquids is proper or not can directly influence the thermal management process in the operation of the supercritical water oxidation treatment equipment, thereby influencing the operation safety and the production operation cost of the equipment. Disclosure of Invention The invention aims to provide an automatic emulsification homogenizing pretreatment system for radioactive waste lubricating oil and greasy dirt, which solves the problem of emulsification homogenizing of the current simultaneous treatment of radioactive organic waste liquid with large concentration difference. An automatic emulsification homogenizing pretreatment system for radioactive waste lubricating oil and oil stain cleaning waste liquid mainly comprises a PLC control system, a waste lubricating oil storage tank 1, an oil stain cleaning waste liquid storage tank 2, an emulsifying agent storage tank 3, a first emulsification stirring tank 4-1 and a second emulsification stirring tank 4-2, wherein, The waste lubricating oil enters a waste lubricating oil storage tank 1 through a first delivery pump 5-1, 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 first filter 10-1, a third delivery pump 5-3 and a first flowmeter 6-1 are sequentially arranged on a pipeline at the rear end of the first electric valve 8-1, the pipeline behind the first flowmeter 6-1 is divided into two paths of parallel pipelines, and the two paths of parallel pipelines enter a first emulsifying and stirring tank 4-1 and a second emulsifying and stirring tank 4-2 through a sixth electric valve 8-6 and a seventh electric valve 8-7 respectively; The oil stain cleaning waste liquid enters an oil stain cleaning waste liquid storage tank 2 through a second delivery pump 5-2, a second manual emptying valve 9-2 and a third electric valve 8-3 are arranged at the bottom of the oil stain cleaning waste liquid storage tank 2, a second filter 10-2, a fourth delivery pump 5-4 and a second flowmeter 6-2 are sequentially arranged on a pipeline at the rear end of the third electric valve 8-3, and the second flowmeter 6-2 is divided into two parallel pipelines which respectively enter a first emulsifying stirring tank 4-1 and a second emulsifying stirring tank 4-2 through the fourth electric valve 8-4 and the fifth electric valve 8-5; the opening in the middle of the tank body of the oil stain cleaning waste liquid storage tank 2 is connected with a first online COD detector 11-1 through a second electric valve 8-2; The bottom of the emulsifier storage tank 3 is provided with a fifth manual emptying valve 9-5 and a fourteenth electric valve 8-14, a pipeline at the rear end of the fourteenth electric valve 8-14 is sequentially provided with a third filter 10-3, a fifth delivery pump 5-5 and a third flowmeter 6-3, the pipeline behind the third flowmeter 6-3 is divided into two paths of parallel pipelines, and the two paths of parallel pipelines enter the first emulsifying stirring tank 4-1 and the second emulsifying stirring tank 4-2 through the eighth electric valve 8-8 and the ninth electric valve 8-9 respectively; The bottoms of the first emulsifying stirring tank 4-1 and the second emulsifying stirring tank 4-2 are respectively provided with a third manual emptying valve 9-3 and a fourth manual emptying valve 9-4, wherein 25 percent and 60 percent of the tank body height of the first emulsifying stirring tank 4-1 are respectively provided with holes through a tenth electric valve 8-10 and an eleventh electric valve 8-11 and are connected with a second online COD detector 11-2, and 25 percent and 60 percent of the tank body height of th