CN114291921A - Decay pond system for radioactive wastewater in hospital and treatment method thereof - Google Patents
Decay pond system for radioactive wastewater in hospital and treatment method thereof Download PDFInfo
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- CN114291921A CN114291921A CN202111431144.9A CN202111431144A CN114291921A CN 114291921 A CN114291921 A CN 114291921A CN 202111431144 A CN202111431144 A CN 202111431144A CN 114291921 A CN114291921 A CN 114291921A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or 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
- G21F9/04—Treating liquids
- G21F9/06—Processing
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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
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/10—Processing by flocculation
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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
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/12—Processing by absorption; by adsorption; by ion-exchange
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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
- G21F9/04—Treating liquids
- G21F9/20—Disposal of liquid waste
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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
- G21F9/04—Treating liquids
- G21F9/20—Disposal of liquid waste
- G21F9/22—Disposal of liquid waste by storage in a tank or other container
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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
- G21F9/04—Treating liquids
- G21F9/20—Disposal of liquid waste
- G21F9/26—Disposal of liquid waste by dilution in water, e.g. in ocean, in stream
Abstract
The invention discloses a radioactive wastewater decay pond system for hospitals, which comprises a water inlet system, a first decay pond, a second decay pond and a water outlet system which are sequentially connected by a cast iron pipe; the water outlet system is respectively connected with the second decay tank and the clean water tank, a detector is also arranged on the water outlet system, and tap water in the clean water tank is used for diluting the secondary decay liquid treated by the second decay tank; the detector is used for detecting the liquid reaching the standard to be discharged from the water outlet system; meanwhile, a radioactive wastewater decay treatment method is also provided, and the rapid condensation removal of the radioactive nuclide is realized by adding a chemical treatment agent. The hospital radioactive waste water conveyed into the decay tank is stored and filtered, and after being treated by adding the chemical treatment agent, the hospital radioactive waste water sequentially enters the decay tank to become decay liquid, reaches the water outlet system, is detected to reach the standard and is discharged to the drainage channel from the water outlet control valve, so that the treatment time is shortened, the complexity of the decay tank system is reduced, and the space is saved.
Description
Technical Field
The invention relates to the technical field of radioactive wastewater treatment, in particular to a radioactive wastewater decay pond system for hospitals and a radioactive wastewater decay treatment method thereof.
Background
The radioactive isotope is mostly used by hospitals when patients with tumors or cancers are diagnosed and treated, the patients generate excrement after injecting or taking radioactive isotope medicines, and a large amount of radioactive wastewater is generated by flushing and discharging the excrement, so that the radioactive wastewater also becomes a main source of the radioactive wastewater in the hospitals; in addition, hospital laboratory sewage, washing water of radioactive protective clothing and medical instruments and medicines, medicine preparation, and the like can generate radioactive wastewater when excessive doses of isotope medicines are poured; some hospitals may mix and discharge some domestic sewage and radioactive wastewater in order to dilute the radioactive wastewater and shorten the decay period; therefore, the difference from the common radioactive wastewater is that the radioactive wastewater generated in hospitals may be mixed with a large amount of impurities;
at present, hospitals generally adopt a multi-stage decay pond system to treat wastewater, so that nuclides with short half-life periods in the wastewater automatically decay into safe chemical elements after being stored in a decay pond for a period of time; after a period of natural decay, the radioactive concentration of the wastewater is reduced to a certain standard and then the wastewater can be introduced into a municipal sewage pipeline for discharge; the radioactive waste water of hospital of handling at present adopts multistage decay pond system usually to set up multistage filter screen or filter equipment in decay pond system, realize the filtration to waste water and increase waste water circulation time, realize the radioactive decay of the nuclide of short half-life when preventing that impurity silts up in the pond and blocks up pipeline. The multistage decay pond system arranged in the way occupies a large space, is complex in equipment and low in utilization rate, and can only treat nuclides with short half-life periods in the using process. Therefore, improvements in hospital radioactive wastewater decay pond systems and modification treatments for wastewater decay and the like are needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel layout structure of a hospital radioactive wastewater multistage decay pond system, which is used for storing and filtering hospital radioactive wastewater conveyed into a decay pond, and simultaneously provides a radioactive wastewater decay treatment method according to the decay pond system, and the radioactive wastewater decay treatment method can realize the rapid condensation removal of radioactive nuclide by adding a chemical treatment agent, thereby reducing the complexity of the decay pond system while reducing the treatment time and saving the space.
The invention is realized by the following technical scheme:
a hospital radioactive wastewater decay pond system comprises a water inlet system, a first decay pond, a second decay pond and a water outlet system which are sequentially connected by a cast iron pipe; the water outlet system is respectively connected with a second decay tank and a clean water tank, a detector is further arranged on the water outlet system, and tap water in the clean water tank is used for diluting the secondary decay liquid treated by the second decay tank; the detector is used for detecting the liquid reaching the standard to be discharged from the water outlet system; the radioactive wastewater entering from the water inlet system is added with a chemical treatment agent for treatment, then sequentially enters the first decay tank, is converted into primary decay liquid through primary decay, then enters the second decay tank, is converted into secondary decay liquid through secondary decay, then reaches the water outlet system, is detected by the detector to reach the discharge standard, is converted into standard liquid, and is discharged to a water discharge channel from the water outlet control valve.
Furthermore, the water inlet system comprises a water inlet pump, a stirrer, a first control pump and a second control pump which are arranged side by side, and a monitor is arranged on the side edge of the stirrer; the radioactive wastewater entering from the water inlet is pressurized by the water inlet pump, the chemical treatment agent is added from the monitor, then the stirrer is used for accelerating stirring and mixing, and the radioactive wastewater and the chemical treatment agent perform physical and chemical actions and then enter the first decay tank;
preferably, the first control pump and the second control pump which are arranged side by side realize the serial and parallel functions by adjusting the positive and negative rotation modes, when radioactive wastewater enters, the first control valve at the first decay tank is closed, the first control pump and the second control pump are adjusted to realize the serial function, so that the water inlet pump, the stirrer, the first control pump and the second control pump form a circulating system, and the radioactive wastewater and the chemical treatment agent are subjected to sufficient physical and chemical effects;
and opening a first control valve at the first decay tank, and adjusting the first control pump and the second control pump to act in parallel to enable the radioactive waste water to rapidly enter the first decay tank.
And further, a third control pump and a fourth control pump are further arranged on the water outlet system, and the secondary decay liquid is fully stirred by the third control pump and the fourth control pump after entering the water outlet system and is fully diluted with tap water in the clean water tank to form standard-reaching liquid which is discharged to a water discharge channel from the water outlet control valve.
The water pump control structures are arranged in the water inlet system area and the water outlet system area, so that the radioactive wastewater can be conveniently controlled, the speed and the pressure of a water body can be rapidly improved in the water inlet area, the dispersibility of particles can be avoided, the physicochemical action can be rapidly generated after the chemical treatment agent is added, and the radioactive wastewater enters the decay tank for settlement; and set up water pump control detecting system in the play water zone, when monitoring quality of water, conveniently mix with the running water and dilute the water, discharge safelyr.
Further, the chemical treatment agent comprises an inorganic flocculant, a polyurethane resin and a polyacrylamide flocculant; the weight of the chemical treatment agent is 4.5-7.5% of that of the radioactive wastewater, preferably 5%, 5.5%, 6.5% and 7%.
The inorganic flocculant is selected from one or a mixture of activated carbon, activated silica, polymeric ferric aluminum sulfate chloride, aluminum chloride, ferric sulfate and polymeric ferric chloride; the weight of the inorganic flocculant added is 0.5-1.5% of that of the radioactive wastewater, preferably 0.5%, 0.7%, 1%, 1.2% and 1.5%.
The chemical treatment agent also comprises a regulator, wherein the regulator is NaOH solution or NaOH and KI solution, and the weight of the added regulator is 1.5-2.5% of that of the radioactive wastewater, preferably 1.7%, 2%, 2.3% and 2.5%.
The radioactive wastewater is treated by adding the mixed chemical treatment agent, the inorganic flocculant can provide a large amount of complex ions and can strongly adsorb colloidal particles, colloid condensation is formed through adsorption and crosslinking, physical and chemical changes are generated at the same time, charges on the surfaces of the colloidal particles and suspended matters are neutralized, the colloidal particles are changed from original repulsion to attraction, and micelle stability is destroyed, so that flocculent coagulative precipitation is formed; the polyurethane resin and the polyacrylamide flocculant can generate a compressed double electric layer to ensure that suspended particles in the wastewater lose stability, colloidal particles are mutually condensed to ensure that the particles are enlarged to form floccules and alumen ustum, and the floccules grow to a certain volume and then separate from a water phase under the action of gravity to precipitate, so that a large amount of suspended matters in the wastewater are removed, and the effect of water treatment is achieved; adding a regulator to make the radioactive wastewater in a weakly alkaline state, and further improving the activity and action time of the chemical treatment agent; meanwhile, the KI solution has strong oxidation-reduction property, can oxidize radioactive ions, and is convenient to form flocculent gel while reducing the chemical activity. The addition of the activated carbon, the polymeric ferric aluminum sulfate chloride and the polymeric ferric chloride can effectively remove the pigment in the wastewater and quickly clarify the water body.
The application also provides a treatment method for decay of the radioactive wastewater in the hospital, which comprises the following steps:
step 1, radioactive wastewater enters from a water inlet and is pressurized by a water inlet pump, and reaches a stirrer to be stirred;
step 2, adding a chemical treatment agent from the monitor, and further accelerating stirring and mixing of the radioactive wastewater under the circulating action of the water inlet pump, the stirrer, the first control pump and the second control pump;
step 3, opening the first control valve, adjusting the first control pump and the second control pump to enable the radioactive wastewater to enter a first decay tank, and enabling the radioactive wastewater and a chemical treatment agent to have physical and chemical actions in the first decay tank to form a coacervate colloid and a layered water body of the primary decay liquid;
step 4, the primary decay liquid is filtered once and then enters a second decay tank, a proper amount of chemical treatment agent is added again in the decay process to form secondary decay liquid,
and 5, secondary attenuation liquid enters a water outlet system after secondary filtration, is detected and confirmed, is diluted into standard-reaching liquid by using a proper amount of tap water and is discharged to a drainage channel from the water outlet control valve.
Further, adding a chemical treatment agent selected from one or a mixture of polyurethane resin, a polyacrylamide flocculant, active silica, poly ferric aluminum sulfate chloride, aluminum chloride, ferric sulfate and poly ferric chloride in the step 2, wherein the adding weight is 4.5-7.5% of that of the radioactive wastewater; preferably a mixture of polyurethane resin, polyacrylamide flocculant, active silicon dioxide, polymeric ferric aluminum sulfate chloride and polymeric ferric chloride, and the addition amount is 5-6%;
step 3, adding 1.5-2.5% of NaOH and KI solution as a chemical treatment agent, preferably performing condensation precipitation on the radioactive wastewater for 2-5 hours, and then adding 1.5-2% of NaOH and KI solution for redox reaction, so that the using amount of the chemical treatment agent can be reduced, the water body is not easy to generate a color change phenomenon, and the using amounts of activated carbon and activated silicon dioxide are reduced;
and 4, adding 0.5 to 1.5 percent of activated carbon and activated silicon dioxide serving as chemical treatment agents, and removing the plain colors in the water body while purifying the water body.
Compared with the prior art, the invention has the advantages that:
1. the water pump control structures are arranged in the water inlet system area and the water outlet system area, so that the radioactive wastewater can be conveniently controlled, the speed and the pressure of a water body can be rapidly improved in the water inlet area, the dispersibility of particles can be avoided, the physicochemical action can be rapidly generated after the chemical treatment agent is added, and the radioactive wastewater enters the decay tank for settlement; and set up water pump control detecting system in the play water zone, when monitoring quality of water, conveniently mix with the running water and dilute the water, discharge safelyr.
2. The radioactive waste water is treated by adding the mixed chemical treatment agent, the inorganic flocculant can provide a large amount of complex ions and can strongly adsorb colloidal particles, colloid condensation is formed through adsorption and crosslinking, physical and chemical changes are generated at the same time, charges on the surfaces of the colloidal particles and suspended matters are neutralized, the colloidal particles are changed from original repulsion to attraction, the micelle stability is destroyed, and therefore flocculent coagulation precipitation is formed.
3. Adding a regulator to make the radioactive wastewater in a weakly alkaline state, and further improving the activity and action time of the chemical treatment agent; meanwhile, the KI solution has strong oxidation-reduction property, can oxidize radioactive ions, and is convenient to form flocculent gel while reducing the chemical activity. The addition of the activated carbon, the polymeric ferric aluminum sulfate chloride and the polymeric ferric chloride can effectively remove the pigment in the wastewater and quickly clarify the water body.
Drawings
Fig. 1 is a schematic structural diagram of a radioactive wastewater decay pond system of a hospital according to the present invention.
1-a water inlet system, 11-a water inlet pump, 12-a stirrer, 13-a first control pump, 14-a second control pump and 15-a monitor;
2-a first decay tank, 21-a first control valve; 3-a second decay tank; 4-cast iron pipes; 5-a clean water tank; 6-water outlet system, 61-third control pump, 62-fourth control pump, 63-detector and 64-water outlet control valve.
Detailed Description
The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in figure 1, the hospital radioactive wastewater decay pond system is realized by the following technical scheme: comprises a water inlet system 1, a first decay tank 2, a second decay tank 3 and a water outlet system 6 which are connected in sequence by a cast iron pipe 4; the water outlet system 6 is respectively connected with the second decay tank 3 and the clean water tank 5, a detector 63 is further arranged on the water outlet system 6, and tap water in the clean water tank 5 is used for diluting the secondary decay liquid treated by the second decay tank 3; the detector 63 is used to detect the compliance liquid to be removed from the effluent system 6; the radioactive wastewater entering from the water inlet system 1 is added with a chemical treatment agent for treatment, then sequentially enters the first decay tank 2, is converted into primary decay liquid through primary decay, then enters the second decay tank 3, is converted into secondary decay liquid through secondary decay, then reaches the water outlet system 6, is detected by the detector 63 to reach the discharge standard, is converted into standard liquid, and is discharged to a drainage channel from the water outlet control valve 64. The water pump control structures are arranged in the water inlet system area and the water outlet system area, so that the radioactive wastewater can be conveniently controlled, the speed and the pressure of a water body can be rapidly improved in the water inlet area, the dispersibility of particles can be avoided, the physicochemical action can be rapidly generated after the chemical treatment agent is added, and the radioactive wastewater enters the decay tank for settlement; and set up water pump control detecting system in the play water zone, when monitoring quality of water, conveniently mix with the running water and dilute the water, discharge safelyr.
As a further improvement, the water inlet system 1 comprises a water inlet pump 11, a stirrer 12, a first control pump 13 and a second control pump 14 which are arranged side by side, and a monitor 15 is arranged on the side of the stirrer 12; the radioactive waste water entering from the water inlet is pressurized by a water inlet pump 11, meanwhile, a chemical treatment agent is added from a monitor 15, then the stirrer 12 accelerates stirring and mixing, and the radioactive waste water and the chemical treatment agent generate physical and chemical actions and then enter a first decay tank 2; the first control pump 13 and the second control pump 14 which are arranged side by side realize the serial and parallel functions by adjusting the positive and negative rotation modes, when radioactive wastewater enters, the first control valve 21 at the first decay tank 2 is closed, the first control pump 13 and the second control pump 14 are adjusted to have the serial function, the water inlet pump 11, the stirrer 12, the first control pump 13 and the second control pump 14 form a circulating system, and the radioactive wastewater and the chemical treatment agent are enabled to generate sufficient physical and chemical effects; opening a first control valve 21 at the first decay tank 2, adjusting the first control pump 13 and the second control pump 14 to act in parallel, and then enabling the radioactive waste water to rapidly enter the first decay tank 2; the effluent system 6 is also provided with a third control pump 61 and a fourth control pump 62, and the secondary decay liquid enters the effluent system 6, is fully stirred by the third control pump 61 and the fourth control pump 62 and is fully diluted with tap water in the clean water tank 5 to form standard-reaching liquid, and is discharged to a drainage channel from an effluent control valve 64.
As the radioactive waste water decay pond system, the invention also provides a treatment method for decay of hospital radioactive waste water, which comprises the following steps:
step 1, radioactive wastewater enters from a water inlet and is pressurized by a water inlet pump 11, and reaches a stirrer 12 for stirring;
step 2, adding a chemical treatment agent from the monitor 15, and further accelerating the stirring and mixing of the radioactive wastewater under the circulating action of the water inlet pump 11, the stirrer 12, the first control pump 13 and the second control pump 14; the chemical treatment agent is selected from one or a mixture of polyurethane resin, polyacrylamide flocculant, active silica, polymeric ferric aluminum sulfate chloride, aluminum chloride, ferric sulfate and polymeric ferric chloride, and the weight of the added chemical treatment agent is 4.5-7.5 percent of that of the radioactive wastewater; preferably a mixture of polyurethane resin, polyacrylamide flocculant, active silicon dioxide, polymeric ferric aluminum sulfate chloride and polymeric ferric chloride, and the addition amount is 5-6%;
step 3, opening the first control valve 21, adjusting the first control pump 13 and the second control pump 14 to enable the radioactive wastewater to enter the first decay tank 2, and performing physical and chemical actions with a chemical treatment agent in the first decay tank 2 to form a primary decay liquid coacervate colloid and a layered water body; adding 1.5-2.5% NaOH and KI solution as chemical treatment agent, preferably performing condensation precipitation on radioactive wastewater for 2-5 hours, and then adding 1.5-2% NaOH and KI solution for redox reaction, so that the use amount of the chemical treatment agent can be reduced, the water body is not easy to generate discoloration phenomenon, and the use amounts of activated carbon and activated silicon dioxide are reduced;
step 4, the primary decay liquid is filtered once and then enters a second decay tank 3, a proper amount of chemical treatment agent is added again in the decay process to form secondary decay liquid, and the chemical treatment agent which is 0.5 to 1.5 percent of active carbon and active silicon dioxide is added in the step, so that the plain color in the water body is removed while the water body is purified;
and step 5, the secondary attenuation liquid enters the water outlet system 6 after secondary filtration, is detected and confirmed, is diluted into standard liquid by using a proper amount of tap water and is discharged to a drainage channel from the water outlet control valve 64.
As a further improvement, the chemical treatment agents include inorganic flocculants, polyurethane resins and polyacrylamide flocculants; preferably 5%, 5.5%, 6.5%, 7%. The inorganic flocculant is selected from one or a mixture of activated carbon, activated silica, polymeric ferric aluminum sulfate chloride, aluminum chloride, ferric sulfate and polymeric ferric chloride, and is preferably 0.5%, 0.7%, 1%, 1.2% and 1.5%. The chemical treatment agent also comprises a regulator, wherein the regulator is NaOH solution or NaOH and KI solution, and preferably 1.7%, 2%, 2.3% and 2.5%. The radioactive wastewater is treated by adding the mixed chemical treatment agent, the inorganic flocculant can provide a large amount of complex ions and can strongly adsorb colloidal particles, colloid condensation is formed through adsorption and crosslinking, physical and chemical changes are generated at the same time, charges on the surfaces of the colloidal particles and suspended matters are neutralized, the colloidal particles are changed from original repulsion to attraction, and micelle stability is destroyed, so that flocculent coagulative precipitation is formed; the polyurethane resin and the polyacrylamide flocculant can generate a compressed double electric layer to ensure that suspended particles in the wastewater lose stability, colloidal particles are mutually condensed to ensure that the particles are enlarged to form floccules and alumen ustum, and the floccules grow to a certain volume and then separate from a water phase under the action of gravity to precipitate, so that a large amount of suspended matters in the wastewater are removed, and the effect of water treatment is achieved; adding a regulator to make the radioactive wastewater in a weakly alkaline state, and further improving the activity and action time of the chemical treatment agent; meanwhile, the KI solution has strong oxidation-reduction property, can oxidize radioactive ions, and is convenient to form flocculent gel while reducing the chemical activity. The addition of the activated carbon, the polymeric ferric aluminum sulfate chloride and the polymeric ferric chloride can effectively remove the pigment in the wastewater and quickly clarify the water body.
Taking 1 ton of radioactive wastewater as an example, a radioactive wastewater decay pond system is constructed, the size of a decay pond is about 2.0m, the width of the decay pond is about 1.0m, and the height of the decay pond is about 1m, chemical treatment agents with the total weight of 5%, 5.5%, 6.5% and 7% are respectively added into the radioactive wastewater, the radioactive wastewater is stirred to sequentially enter a first decay pond and a second decay pond for gelation, after the first decay pond and the second decay pond fully decay, the radioactive wastewater gel is filtered, and 2.5%, 2.3%, 2% and 1.7% of NaOH and KI solution are added for oxidation-reduction reaction; and finally, removing plain colors in the water body while purifying the water body by using 1.5%, 1.2%, 1.0% and 0.7% of activated carbon and activated silicon dioxide, and testing the reaction time for 2 hours, 2.5 hours, 3.5 hours and 4.5 hours. According to the nuclear medicine radioprotection standard, a relative risk weight factor of 0.02 (0.080mSv/h, 0.075mSv/h, 0.082mSv/h and 0.079mSv/h) is obtained by detection of a radiation detector (measurement range: 0.05 usv/h-10000 usv/h), and the emission standard is met.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A hospital radioactive wastewater decay pool system comprises a water inlet system (1), a first decay pool (2), a second decay pool (3) and a water outlet system (6) which are sequentially connected by a cast iron pipe (4); the method is characterized in that: the water outlet system (6) is respectively connected with the second decay tank (3) and the clean water tank (5), a detector (63) is further arranged on the water outlet system (6), and tap water in the clean water tank (5) is used for diluting the secondary decay liquid treated by the second decay tank (3); the detector (63) is for detecting compliance liquid to be removed from the effluent system (6).
2. The hospital radioactive wastewater decay pond system of claim 1, wherein: the water inlet system (1) comprises a water inlet pump (11), a stirrer (12), a first control pump (13) and a second control pump (14) which are arranged side by side, and a monitor (15) is arranged on the side edge of the stirrer (12); the radioactive waste water entering from the water inlet is pressurized by the water inlet pump (11), the chemical treatment agent is added from the monitor (15) at the same time, the stirrer (12) is stirred and mixed in an accelerating way, and the radioactive waste water and the chemical treatment agent enter the first decay tank (2) after physical and chemical actions are generated.
3. The hospital radioactive wastewater decay pond system of claim 2, wherein: first control pump (13) and second control pump (14) that set up side by side realize establishing ties and parallel operation through the mode of adjusting just reversing, when radioactive waste water gets into, close first control valve (21) of first decay pond (2) department, adjust first control pump (13) and second control pump (14) become the series connection effect, realize intake pump (11), agitator (12), first control pump (13) and second control pump (14) form the circulation system.
4. The hospital radioactive wastewater decay pond system of claim 1, wherein: and the water outlet system (6) is also provided with a third control pump (61) and a fourth control pump (62), and the secondary decay liquid enters the water outlet system (6) and then is fully stirred by the third control pump (61) and the fourth control pump (62) and fully diluted with tap water in the clean water tank (5) to form standard-reaching liquid which is discharged to a drainage channel from the water outlet control valve (64).
5. The hospital radioactive wastewater decay pond system of claim 2, wherein: the chemical treatment agent comprises an inorganic flocculant, polyurethane resin and a polyacrylamide flocculant; the weight of the chemical treatment agent added is 4.5-7.5% of that of the radioactive wastewater.
6. The hospital radioactive wastewater decay pond system of claim 5, wherein: the inorganic flocculant is selected from one or a mixture of activated carbon, activated silica, polymeric ferric aluminum sulfate chloride, aluminum chloride, ferric sulfate and polymeric ferric chloride.
7. The hospital radioactive wastewater decay pond system of claim 5, wherein: the chemical treatment agent also comprises a regulator, wherein the regulator is NaOH solution or NaOH and KI solution, and the weight of the added regulator is 1.5-2.5% of that of the radioactive wastewater.
8. A treatment method for decay of radioactive wastewater in hospitals is characterized by comprising the following steps:
step 1, radioactive wastewater enters from a water inlet, is pressurized by a water inlet pump (11), and reaches a stirrer (12) for stirring;
step 2, adding a chemical treatment agent from a monitor (15), and further accelerating stirring and mixing of the radioactive wastewater under the circulating action of a water inlet pump (11), a stirrer (12), a first control pump (13) and a second control pump (14);
step 3, opening a first control valve (21), adjusting a first control pump (13) and a second control pump (14) to enable radioactive wastewater to enter a first decay tank (2), and enabling the radioactive wastewater to have physical and chemical actions with a chemical treatment agent in the first decay tank (2) to form a primary decay liquid coacervate colloid and a layered water body;
step 4, the primary decay liquid is filtered once and then enters a second decay tank (3), and a proper amount of chemical treatment agent is added again in the decay process to form secondary decay liquid;
and 5, the secondary attenuation liquid enters a water outlet system (6) after secondary filtration, is detected and confirmed, is diluted into standard liquid by using a proper amount of tap water and is discharged to a drainage channel from a water outlet control valve (64).
9. The method for decay treatment of hospital radioactive wastewater according to claim 8, characterized in that: and 2, adding a chemical treatment agent selected from one or a mixture of polyurethane resin, a polyacrylamide flocculant, active silicon dioxide, polymeric ferric aluminum sulfate chloride, aluminum chloride, ferric sulfate and polymeric ferric chloride, wherein the adding weight is 4.5-7.5% of that of the radioactive wastewater.
10. The method for decay treatment of hospital radioactive wastewater according to claim 8, characterized in that: step 3, adding NaOH and KI solution with 1.5 to 2.5 percent of chemical treatment agent; and step 4, adding 0.5 to 1.5 percent of activated carbon and activated silicon dioxide serving as chemical treatment agents.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431144.9A CN114291921A (en) | 2021-11-29 | 2021-11-29 | Decay pond system for radioactive wastewater in hospital and treatment method thereof |
| PCT/CN2022/111016 WO2023093126A1 (en) | 2021-11-29 | 2022-08-09 | Hospital radioactive wastewater decay tank system and hospital radioactive wastewater decay treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111431144.9A CN114291921A (en) | 2021-11-29 | 2021-11-29 | Decay pond system for radioactive wastewater in hospital and treatment method thereof |
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| CN114291921A true CN114291921A (en) | 2022-04-08 |
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| CN202111431144.9A Withdrawn CN114291921A (en) | 2021-11-29 | 2021-11-29 | Decay pond system for radioactive wastewater in hospital and treatment method thereof |
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| WO (1) | WO2023093126A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023093126A1 (en) * | 2021-11-29 | 2023-06-01 | 江苏超敏科技有限公司 | Hospital radioactive wastewater decay tank system and hospital radioactive wastewater decay treatment method |
| CN117012429A (en) * | 2023-08-16 | 2023-11-07 | 西南科技大学 | Integrated nuclear medicine radioactive wastewater rapid treatment system and application method |
| CN117059292A (en) * | 2023-08-16 | 2023-11-14 | 西南科技大学 | Pretreatment system for solid-liquid separation of nuclear medical radioactive wastewater and application method |
| CN117116521A (en) * | 2023-07-25 | 2023-11-24 | 上海核工程研究设计院股份有限公司 | Nuclear medicine decay Chi Feiye full-automatic processing system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60636B2 (en) * | 1979-12-25 | 1985-01-09 | 三菱マテリアル株式会社 | Treatment method for radioactive waste liquid |
| JPH07198894A (en) * | 1994-01-07 | 1995-08-01 | Mitsubishi Nuclear Fuel Co Ltd | Method for treating radioactive waste liquid |
| JP4524444B2 (en) * | 2001-03-13 | 2010-08-18 | 株式会社千代田テクノル | Radioactive material-containing waste liquid treatment method and equipment |
| CN103151088A (en) * | 2013-03-28 | 2013-06-12 | 南京大学宜兴环保研究院 | Composite flocculating agent for processing radioactive elements iron, cobalt, manganese and silver in nuclear waste water and processing method |
| GB2533497B (en) * | 2013-08-23 | 2017-12-20 | Hitachi Ge Nuclear Energy Ltd | Method of treating radioactive liquid waste and radioactive liquid waste treatment apparatus |
| CN211555495U (en) * | 2020-01-21 | 2020-09-22 | 潍坊三维生物工程集团有限公司 | Radioactive wastewater treatment device in radioimmunoassay kit production |
| CN114291921A (en) * | 2021-11-29 | 2022-04-08 | 江苏超敏科技有限公司 | Decay pond system for radioactive wastewater in hospital and treatment method thereof |
-
2021
- 2021-11-29 CN CN202111431144.9A patent/CN114291921A/en not_active Withdrawn
-
2022
- 2022-08-09 WO PCT/CN2022/111016 patent/WO2023093126A1/en unknown
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023093126A1 (en) * | 2021-11-29 | 2023-06-01 | 江苏超敏科技有限公司 | Hospital radioactive wastewater decay tank system and hospital radioactive wastewater decay treatment method |
| CN117116521A (en) * | 2023-07-25 | 2023-11-24 | 上海核工程研究设计院股份有限公司 | Nuclear medicine decay Chi Feiye full-automatic processing system |
| CN117116521B (en) * | 2023-07-25 | 2024-04-26 | 上海核工程研究设计院股份有限公司 | Full-automatic processing system for nuclear medicine decay Chi Feiye |
| CN117012429A (en) * | 2023-08-16 | 2023-11-07 | 西南科技大学 | Integrated nuclear medicine radioactive wastewater rapid treatment system and application method |
| CN117059292A (en) * | 2023-08-16 | 2023-11-14 | 西南科技大学 | Pretreatment system for solid-liquid separation of nuclear medical radioactive wastewater and application method |
| CN117012429B (en) * | 2023-08-16 | 2024-03-22 | 西南科技大学 | Integrated nuclear medicine radioactive wastewater rapid treatment system and application method |
| CN117059292B (en) * | 2023-08-16 | 2024-03-29 | 西南科技大学 | Pretreatment system for solid-liquid separation of nuclear medical radioactive wastewater and application method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023093126A1 (en) | 2023-06-01 |
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Application publication date: 20220408 |