CN105632576A - Recovery method of radioactive slurry - Google Patents
Recovery method of radioactive slurry Download PDFInfo
- Publication number
- CN105632576A CN105632576A CN201510906579.2A CN201510906579A CN105632576A CN 105632576 A CN105632576 A CN 105632576A CN 201510906579 A CN201510906579 A CN 201510906579A CN 105632576 A CN105632576 A CN 105632576A
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- mud
- pond
- basin
- cement
- sewage
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/28—Treating solids
- G21F9/30—Processing
- G21F9/301—Processing by fixation in stable solid media
- G21F9/302—Processing by fixation in stable solid media in an inorganic matrix
- G21F9/304—Cement or cement-like matrix
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- Inorganic Chemistry (AREA)
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- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of radioactive solid waste treatment and particularly relates to a recovery method of radioactive slurry. According to the technical scheme, a process route including mechanical stirring in a tank, vacuum suction, solid-liquid separation, slurry drying and conditioning, liquid cement solidification and system back washing is adopted, finally, the conditioned waste meets the receiving requirements of a waste temporary storage house, and a conditioned cement solidified body meets the disposal requirements of a shallow surface disposal place. The recovery method has the benefits as follows: remote control is adopted in the whole course, and radiation safety and industrial safety for workers in the waste recovery process are sufficiently guaranteed; the set of equipment can be reused in other similar engineering due to the characteristics of miniaturization, easiness in decontamination and the like of equipment, and the waste disposal cost is reduced; the conditioned waste packaging bodies can be directly matched with existing waste treatment and disposal facility connectors, and the input of human, financial and material resources required for secondary conditioning of waste is effectively reduced.
Description
Technical field
The invention belongs to radioactive solid waste and process disposal technology field, particularly relate to time access method of radioactivity mud in a kind of pond or basin.
Background technology
Radioactivity mud for pond or tank bottom, abroad rely primarily on climbing robot return take or mixing pump stirring after integral suction, its drawback is in that: refuse processing cost is higher, is no matter that the mixing pump of climbing robot or external import and other supporting equipment, the equal cost of facility are high. Returning the refuse after taking and be wet solid waste, free fluid content is higher, processes disposal facility interface with follow-up refuse and does not match. System equipment decontamination is comparatively difficult, substantially without multiplexing probability. The domestic report having no case history. Accordingly, it is desirable to provide in a kind of pond or basin radioactivity mud return access method.
Summary of the invention
The present invention is directed to the technical problem that prior art cost is high, interface does not match, it is proposed that in a kind of pond or basin, radioactivity mud returns access method.
Realize the technical scheme of the object of the invention:
Time access method of radioactivity mud in a kind of pond or basin, in turn includes the following steps:
Step 1. mud returns and takes
Step 1.1 uses mechanical agitation oar that the mud in pond or basin is stirred, and makes bed mud and waste liquid in pond stir, is observed whether stirring by manhole;
After step 1.2 stirs, by vacuum screw pump, the mud in pond or basin being sent into head tank in batches, controlling mud speed rate during conveying is 0.8��1.5m3/ h;
Step 2. dewatered drying
Step 2.1 opens head tank baiting valve, makes the mud in head tank continuously enter horizontal screw centrifugal filter and carries out solid-liquid separation, obtains mud and sewage, and horizontal screw centrifugal filter rotating speed is 2500��3200rad/min; Sewage self-flowing enters in water leg, and the liquid of water leg is flowed back to by waste liquid circulation valve in pond or basin;
Step 2.2 opens the outlet slide valve of horizontal screw centrifugal filter, and the mud that step 2.1 obtains relies on gravity to enter dehydrator and dries, the solid sludges after being dried; Then, opening the slide valve bottom dehydrator, the solid sludges after drying falls in �� waste packaging container;
Step 3. cement solidification
The solid sludges no longer discharging of step 3.1 machine to be dried, the sewage in sampled confirmation water leg is without, after solid particle, closing the waste liquid circulation valve of water leg; Opening water leg lower part outlet valve, pour the sewage in water leg into measuring tank and weigh, the outlet valve then opening measuring tank makes liquid batch proceed in blender, and the sewage quantity controlled in single entrance blender is 95��105L;
Step 3.2 opens cement bin bottom shutter valve, makes cement enter blender, and the load being controlled cement by star-like feeder is 70��80 kilograms; Open the agitating device of blender, make sewage and cement mix in blender, form sewage cement admixture; Open the slide valve of blender bottom, the sewage cement admixture after stirring is injected in pail for used dressings;
Step 3.3 stands, and initial set, no less than 24 hours, ultimately forms qualified solidified cement body then through maintenance in many days.
The tail gas produced in the drying course of described step 2.2 initially enters condensate cooler 6 and cools down, and condensed fluid is from flowing in water leg; The tail gas that after condensed, the tail gas of residual produces with blender merges, enter cyclone separator 7 and carry out gas solid separation, the radioactive grain carried secretly in gas is separated, solid particle after separation enters ash collection slot either directly through the valve of slagging tap of cyclone separator 7, gas after separation enters high efficiency particulate air filter, after being adsorbed by radionuclide therein, residual gas enters air by centrifugal blower.
It is 0.03��0.06Mpa that described centrifugal blower maintains in whole system.
Described step 1.2 have from discharge orifice on head tank, when every batch of feeding is too much, in unnecessary mud auto-returned pond or basin.
The sewage quantity controlled in described step 3.1 in single entrance blender is 100L.
In described step 3.2, the load by star-like feeder control cement is 75 kilograms.
Controlling mud speed rate in described step 1.2 during conveying is 1m3/h��
In described step 2.1, horizontal screw centrifugal filter rotating speed is 3000rad/min.
In described step 2.2, the mud drying and processing ability of dehydrator is 150kg/h.
Having the beneficial effects that of patent concordance prior art of the present invention: (1) whole process takes long-distance remote control control, fully ensures that refuse returns irradiation safety and the industrial safety of personnel in the process of taking; (2) device miniaturization and be prone to the features such as decontamination and ensure that this complete equipment reusable is in other similar engineering, reduces refuse processing cost; (3) the waste packaging physical ability after reorganizing and outfit directly processes with existing refuse, disposal facility interface, effectively reduces that refuse secondary reorganizes and outfit required human and material resources, financial resources put into.
Accompanying drawing explanation
Fig. 1 is device schematic diagram of the present invention.
In figure: 1-vacuum screw pump; 2-mechanical agitation oar; 3-horizontal screw centrifugal filter; 4-mud dehydrator; 5-slag chute; 6-condenser; 7-cyclone separator; 8-waste liquid receiving slit; 9-cement silo; 10-star-like feeder; 11-clear liquid receiving slit; 12-blender; 13-slush pump; 14-charging basket; 15-measuring tank; 16-hydraulic lift; 17-high efficiency particulate air filter; 18-ash collection slot; 19-roughing efficiency air filter.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Present embodiments providing time access method of radioactivity mud in a kind of pond or basin, the device that its production line adopts is as it is shown in figure 1, the method in turn includes the following steps:
Step 1. mud returns and takes
Step 1.1 uses mechanical agitation oar 2 that the mud in pond or basin is stirred, and makes bed mud and waste liquid in pond stir, and the rotating speed of mechanical agitation oar 2 is 60-80rad/min; After stirring 10 minutes, observed by manhole and whether stirring;
After step 1.2 stirs, starting vacuum screw pump 1, the mud in pond or basin is sent into head tank 8 in batches, controlling mud speed rate during conveying is 1m3/ h, every batch is how many; Head tank 8 have from discharge orifice, when every batch of feeding too much makes the liquid level of head tank 8 beyond 800mm, in unnecessary mud meeting auto-returned pond or basin;
Step 2. dewatered drying
Step 2.1 dehydration
Opening head tank 8 baiting valve, make the mud in head tank 8 continuously enter horizontal screw centrifugal filter 3 and carry out solid-liquid separation, obtain mud and sewage, horizontal screw centrifugal filter 3 rotating speed is 3000rad/min; Sewage relies on gravity to flow in water leg 11, and the liquid of water leg 11 relies on gravity to flow back in pond or basin by waste liquid circulation valve;
Step 2.2 is dried
Opening the outlet slide valve of horizontal screw centrifugal filter 3, the mud that step 2.1 obtains relies on gravity to enter dehydrator 4 and dries, the solid sludges after being dried, and drying time is 2��3 hours, and the mud drying and processing ability of dehydrator 4 is 150kg/h; Then, opening the slide valve bottom dehydrator 4, the solid sludges after drying relies on self gravitation to fall in preprepared �� waste packaging container 14, it is achieved the recovery of radioactivity mud;
Step 3. cement solidification
The solid sludges no longer discharging of step 3.1 machine 4 to be dried, the sewage in sampled confirmation water leg 11 is without, after solid particle, closing the waste liquid circulation valve of water leg 11; Open water leg 11 lower part outlet valve, pour the sewage in water leg 11 into measuring tank 15 to weigh, then the outlet valve opening measuring tank 15 makes liquid batch proceed in blender 12, and the sewage quantity controlled in single entrance blender 12 is 95��105L, it is preferable that 100L;
Step 3.2 opens cement bin 9 bottom shutter valve, makes cement enter blender 12, and the load being controlled cement by star-like feeder 10 is 70��80 kilograms, it is preferable that 75 kilograms; Opening the agitating device of blender 12, make sewage and cement mix in blender 12, form sewage cement admixture, mixing time is 0��3 minute, mixing speed ...; Open the slide valve of blender 12 bottom, the sewage cement admixture after stirring is injected in the pail for used dressings of preprepared 200L, to realize the recovery of radioactive dirty water;
Step 3.3 stands, initial set 24 hours, ultimately forms qualified solidified cement body then through maintenance in 28 days; After testing, the solidified cement body property indices that the present embodiment method is formed is adopted to meet GB14569 standard related request;
Step 4. exhales row's unit
The tail gas produced in the drying course of step 2.2 initially enters condensate cooler 6 and cools down, and condensed fluid is from flowing in water leg 11; The tail gas that after condensed, the tail gas of residual produces with blender 12 merges, enter cyclone separator 7 and carry out gas solid separation, the radioactive grain carried secretly in gas is separated, solid particle after separation enters ash collection slot 18 either directly through the valve of slagging tap of cyclone separator 7, gas after separation enters high efficiency particulate air filter 17, after being adsorbed by radionuclide therein, residual gas enters air by centrifugal blower; Meanwhile, by the swabbing action of centrifugal blower, it is possible to maintain negative pressure in whole system, reducing waste liquid and radioaerosol disclosure risk, in system, negative pressure is 0.03��0.06Mpa, it is preferable that 0.05Mpa.
The radioactivity mud that the present invention adopts returns fetching and puts and include vacuum screw pump 1; Mechanical agitation oar 2; Horizontal screw centrifugal filter 3; Mud dehydrator 4; Slag chute 5; Condenser 6; Cyclone separator 7; Waste liquid receiving slit 8; Cement silo 9; Star-like feeder 10; Clear liquid receiving slit 11; Blender 12; Slush pump 13; Charging basket 14; Measuring tank 15; Hydraulic lift 16; High efficiency particulate air filter 17; Ash collection slot 18 and roughing efficiency air filter 19.
Above embodiments of the invention are explained in detail. Obviously, above-mentioned embodiment is only most highly preferred embodiment of the invention, but the present invention is not limited to above-described embodiment. In the ken that those of ordinary skill in the art possess, it is also possible to make various change under the premise without departing from present inventive concept. If these amendments and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (9)
1. time access method of a radioactivity mud, it is characterised in that the method in turn includes the following steps:
Step 1. mud returns and takes
Step 1.1 uses mechanical agitation oar that the mud in pond or basin is stirred, and makes bed mud and waste liquid in pond stir, is observed whether stirring by manhole;
After step 1.2 stirs, by vacuum screw pump, the mud in pond or basin being sent into head tank in batches, controlling mud speed rate during conveying is 0.8��1.5m3/ h;
Step 2. dewatered drying
Step 2.1 opens head tank baiting valve, makes the mud in head tank continuously enter horizontal screw centrifugal filter and carries out solid-liquid separation, obtains mud and sewage, and horizontal screw centrifugal filter rotating speed is 2500��3200rad/min; Sewage self-flowing enters in water leg, and the liquid of water leg is flowed back to by waste liquid circulation valve in pond or basin;
Step 2.2 opens the outlet slide valve of horizontal screw centrifugal filter, and the mud that step 2.1 obtains relies on gravity to enter dehydrator and dries, the solid sludges after being dried; Then, opening the slide valve bottom dehydrator, the solid sludges after drying falls in �� waste packaging container;
Step 3. cement solidification
The solid sludges no longer discharging of step 3.1 machine to be dried, the sewage in sampled confirmation water leg is without, after solid particle, closing the waste liquid circulation valve of water leg; Opening water leg lower part outlet valve, pour the sewage in water leg into measuring tank and weigh, the outlet valve then opening measuring tank makes liquid batch proceed in blender, and the sewage quantity controlled in single entrance blender is 95��105L;
Step 3.2 opens cement bin bottom shutter valve, makes cement enter blender, and the load being controlled cement by star-like feeder is 70��80 kilograms; Open the agitating device of blender, make sewage and cement mix in blender, form sewage cement admixture; Open the slide valve of blender bottom, the sewage cement admixture after stirring is injected in pail for used dressings;
Step 3.3 stands, and initial set, no less than 24 hours, ultimately forms qualified solidified cement body then through maintenance in many days.
2. in a kind of pond as claimed in claim 1 or basin radioactivity mud return access method, it is characterised in that: the tail gas produced in the drying course of described step 2.2 initially enters condensate cooler 6 and cools down, and condensed fluid is from flowing in water leg; The tail gas that after condensed, the tail gas of residual produces with blender merges, enter cyclone separator 7 and carry out gas solid separation, the radioactive grain carried secretly in gas is separated, solid particle after separation enters ash collection slot either directly through the valve of slagging tap of cyclone separator 7, gas after separation enters high efficiency particulate air filter, after being adsorbed by radionuclide therein, residual gas enters air by centrifugal blower.
3. in a kind of pond as claimed in claim 2 or basin radioactivity mud return access method, it is characterised in that: it is 0.03��0.06Mpa that described centrifugal blower maintains in whole system.
4. in a kind of pond as claimed in claim 1 or 2 or basin radioactivity mud return access method, it is characterised in that: described step 1.2 has from discharge orifice on head tank, when every batch of feeding is too much, in unnecessary mud auto-returned pond or basin.
5. in a kind of pond as claimed in claim 1 or basin radioactivity mud return access method, it is characterised in that: controlling the sewage quantity that single enters in blender in described step 3.1 is 100L.
6. in a kind of pond as claimed in claim 1 or basin radioactivity mud return access method, it is characterised in that: in described step 3.2, the load by star-like feeder control cement is 75 kilograms.
7. in a kind of pond as claimed in claim 1 or basin radioactivity mud return access method, it is characterised in that: controlling mud speed rate in described step 1.2 during conveying is 1m3/h��
8. in a kind of pond as claimed in claim 1 or basin radioactivity mud return access method, it is characterised in that: in described step 2.1, horizontal screw centrifugal filter rotating speed is 3000rad/min.
9. in a kind of pond as claimed in claim 1 or basin radioactivity mud return access method, it is characterised in that: in described step 2.2, the mud drying and processing ability of dehydrator is 150kg/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510906579.2A CN105632576B (en) | 2015-12-10 | 2015-12-10 | A kind of returning for radioactivity mud takes method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510906579.2A CN105632576B (en) | 2015-12-10 | 2015-12-10 | A kind of returning for radioactivity mud takes method |
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| CN105632576A true CN105632576A (en) | 2016-06-01 |
| CN105632576B CN105632576B (en) | 2017-10-27 |
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Cited By (6)
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| CN108242273A (en) * | 2017-12-28 | 2018-07-03 | 中核四0四有限公司 | A kind of device for the stripping of radioactivity concrete structures shallow-layer |
| CN110085342A (en) * | 2019-04-23 | 2019-08-02 | 中国核电工程有限公司 | The retired method of Spent Radioactive liquid storage tank |
| CN111028972A (en) * | 2019-11-18 | 2020-04-17 | 中核四川环保工程有限责任公司 | Solid-liquid separation device and separation method for radioactive slurry |
| CN112786230A (en) * | 2020-12-10 | 2021-05-11 | 中国核电工程有限公司 | Radioactive sediment retrieval device and system in storage tank |
| CN116286115A (en) * | 2023-03-01 | 2023-06-23 | 江西科润新材料科技有限公司 | Continuous collection equipment and continuous collection method for chemical raw materials |
| CN117711660A (en) * | 2023-12-12 | 2024-03-15 | 中核四川环保工程有限责任公司 | Large-scale storage tank waste liquid recovery system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108242273A (en) * | 2017-12-28 | 2018-07-03 | 中核四0四有限公司 | A kind of device for the stripping of radioactivity concrete structures shallow-layer |
| CN110085342A (en) * | 2019-04-23 | 2019-08-02 | 中国核电工程有限公司 | The retired method of Spent Radioactive liquid storage tank |
| CN111028972A (en) * | 2019-11-18 | 2020-04-17 | 中核四川环保工程有限责任公司 | Solid-liquid separation device and separation method for radioactive slurry |
| CN112786230A (en) * | 2020-12-10 | 2021-05-11 | 中国核电工程有限公司 | Radioactive sediment retrieval device and system in storage tank |
| CN112786230B (en) * | 2020-12-10 | 2022-08-12 | 中国核电工程有限公司 | Radioactive sediment retrieval device and system in storage tank |
| CN116286115A (en) * | 2023-03-01 | 2023-06-23 | 江西科润新材料科技有限公司 | Continuous collection equipment and continuous collection method for chemical raw materials |
| CN117711660A (en) * | 2023-12-12 | 2024-03-15 | 中核四川环保工程有限责任公司 | Large-scale storage tank waste liquid recovery system |
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| CN105632576B (en) | 2017-10-27 |
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