4 results about "Low-level waste" patented technology

Drying system for drying a drying medium, in particular for drying fibrous materials, the drying system (1) comprising at least the following components: - an air-to-air heat exchanger (20) with an air-to-air exhaust volume (21) and an air-to-air fresh air volume (22), comprising the air-to-air heat exchanger (20): - a feed-in LLW exhaust air flow arrangement (100) for supplying exhaust air (K) with an initial temperature (T_I) into the LLW exhaust air volume (21) and - a discharging LLW exhaust air flow arrangement (200) with an exhaust air follow-up temperature (T_AF) for discharging exhaust air (K) from the LLW exhaust air volume (21), - a feed-in LLW fresh air flow arrangement (2000) for supplying fresh air (F) with a fresh air flow temperature (T_G) into the LLW fresh air volume (22) and - a discharge LLW fresh air flow arrangement (3000) for discharging fresh air (F) with an LLW outlet temperature (T_AT) from the LLW fresh air volume (22), wherein the LLW exhaust air volume (21) and the LLW fresh air volume (22) are designed such that heat can be transferred from the LLW exhaust air volume (21) to the LLW fresh air volume (22) to warm the fresh air (F); - a media heat exchanger (40) configured to be supplied with a circulating heat medium (U) in order to adjust the fresh air (F) with the LLW outlet temperature (T_AT) from the supplying LLW fresh air flow arrangement (3000) to a process temperature (T_P), wherein the fresh air (F) set to the process temperature (T_P) is supplied to the drying system (30) via a flow arrangement (4000) encompassed by the drying system (1); - a drying system (30) designed for drying the drying medium, wherein the drying system (30) is designed such that the fresh air (F) which is heated at least by the air-to-air heat exchanger (20) and the media heat exchanger (40) and which flows out at least indirectly from the LLW fresh air flow arrangement (3000) and flow-through arrangement (4000) interacts with the drying medium as drying air and absorbs evaporated moisture from the drying medium and discharges it as moisture-laden exhaust air (K) to an exhaust air duct arrangement (5000);wherein the drying system (1) is configured to direct the exhaust air (K) from the drying system (30) via the exhaust air duct arrangement (5000) and via the LLW exhaust air flow arrangement (100) at least indirectly to the air-to-air heat exchanger (20), so that at least an indirect transfer of heat from the exhaust air (K) in the exhaust air duct arrangement (5000) to the fresh air (F) in the air-to-air heat exchanger (20) takes place; ; - a flow heat exchanger (60) with a heat transfer volume (61) and a heating volume (62), comprising the flow heat exchanger (60): - a heat inlet arrangement (300) for introducing a first flow heat medium (S1) with a flow temperature (T_S) into the heat transfer volume (61) and - a discharge heat outlet arrangement (350) with a flow sequence temperature (T_SF) for the discharge of the first flow heat medium (S1) from the heat transfer volume (61), - a feed-in circuit inlet arrangement (450) for the inflow of a second flow heat medium (S2) with a circuit inlet temperature (T_KE) into the heating volume (62) and - a discharge circuit outlet arrangement (400) for the discharge of the second flow heat medium (S2) with a circuit outlet temperature (T_KA) from the heating volume (62), wherein the heat transfer volume (61) and the heating volume (62) are designed such that heat can be transferred from the heat transfer volume (61) to the heating volume (62) in order to heat the second flowing heat medium (S2), wherein the first flow heat medium (S1) of the heat inlet arrangement (300) has flow components from the LLW exhaust air flow arrangement (200) and / or other flow components (SB), - a heat transfer device (70) with a cooling transfer volume (71) and a heating transfer volume (72), comprising the heat transfer device (70): - a heat transfer inlet arrangement (600) for introducing the second flow heat medium (S2) with a heat transfer inlet temperature (T_WTE) into the cooling transfer volume (71) and - a discharge heat transfer outlet arrangement (650) with a heat transfer outlet temperature (T_WTA) for the discharge of the second flow heat medium (S2) from the cooling transfer volume (71), - a circulating inlet arrangement (700) for introducing a circulating heat medium (U) with a circulating inlet temperature (T_UE) into the heat transfer volume (72) and - a discharge circulating outlet arrangement (750) for discharging the circulating heat medium (U) with a circulating outlet temperature (T_UA) from the heat transfer volume (72), and for at least indirect and / or at least partial inflow into the media heat exchanger (40), wherein the cooling transfer volume (71) and the heating transfer volume (72) are designed such that heat can be transferred from the cooling transfer volume (71) to the heating transfer volume (72) in order to heat the circulating heat medium (U); where the recirculation outlet temperature (T_UA) is greater than the fresh air flow temperature (T_G) and greater than the LLW outlet temperature (T_AT).

The invention discloses a movable medium-low radioactivity dry waste crushing and packaging treatment device which comprises an anti-radiation box body, crushing equipment is arranged at the upper end of one side in the anti-radiation box body, and the output end of the crushing equipment communicates with a first three-way distributor; a crushing device is arranged in the anti-radiation box body, a compacting device is arranged in the anti-radiation box body and located below the crushing device, a Z-shaped elevator is arranged in the anti-radiation box body and located on one side of the crushing device, the output end of the Z-shaped elevator is communicated with a second three-way distributor, a metering, mixing and packaging device is arranged on one side of the Z-shaped elevator, and a second three-way distributor is arranged on the other side of the Z-shaped elevator. According to the device, pretreatment of medium-low-radioactivity dry waste in different workshops of a nuclear power plant is achieved, pretreatment of medium-low-radioactivity waste generated in daily operation of the nuclear power plant is achieved, a combustible waste pretreatment waste bag is formed, the combustible waste pretreatment waste bag can meet the feeding requirements of a plasma melting furnace, a combustible waste incinerator and the like, and the whole device has good sealing performance; and leakage of nuclear waste can be avoided.

The invention belongs to the technical field of grinding, and particularly relates to a main pump sealing ring cleaning device which comprises a first box body, a rotating mechanism and a mechanical arm, the rotating mechanism comprises a rotating driving assembly and a rotating supporting piece which are arranged in the first box body, and the rotating supporting piece is used for bearing a sealing ring; the rotary driving assembly drives the rotary supporting piece to rotate; the manipulator is arranged in the first box body, the tail end of the manipulator is connected with a polishing tool, and the polishing tool is used for polishing the sealing ring; mechanical polishing and cleaning of the sealing ring can be achieved, sealing face damage caused by human factors can be reduced, the accuracy and reliability of polishing and cleaning operation can be improved, and the polishing and cleaning efficiency can be improved. Contact between personnel and radioactive substances can be reduced, and radiation hazards are reduced; the consumption of consumables can be reduced, the generation amount of radioactive waste is reduced, and the waste treatment burden is relieved.

The invention provides a green regeneration treatment method of a reverse osmosis membrane, which is characterized in that a waste reverse osmosis membrane is treated by a first treatment liquid composed of potassium ferrate, sodium hypochlorite, potassium permanganate, aluminum chloride and potassium dichromate and a second treatment liquid composed of chitosan, adipic acid, hexamethylenediamine, tannic acid and glycerol, and green regeneration of the waste membrane can be realized. According to the method, the two-step method of oxidation treatment and modification treatment is creatively adopted, the pH value of the first treatment liquid is subjected to acidic-alkaline-acidic-neutral change adjustment in the oxidation treatment, and meanwhile, the oxidation degradation of the membrane material is accelerated by auxiliary means such as ultrasonic treatment, so that the reverse osmosis membrane after regeneration treatment can still keep high retention rate and membrane flux; and the functional reuse of the waste film is completely realized. The treatment method particularly has a high-quality regeneration effect on the reverse osmosis membrane applied to radioactive waste separation, the waste membrane is turned into wealth to be recycled, and the radioactive waste treatment cost is remarkably reduced.