CN117228901A - System for be used for nuclear power plant to contain ammonia waste water treatment - Google Patents
System for be used for nuclear power plant to contain ammonia waste water treatment Download PDFInfo
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- CN117228901A CN117228901A CN202311499048.7A CN202311499048A CN117228901A CN 117228901 A CN117228901 A CN 117228901A CN 202311499048 A CN202311499048 A CN 202311499048A CN 117228901 A CN117228901 A CN 117228901A
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- sedimentation tank
- dosing device
- wastewater
- nuclear power
- degassing membrane
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 15
- 238000004065 wastewater treatment Methods 0.000 title abstract description 6
- 238000004062 sedimentation Methods 0.000 claims abstract description 75
- 239000002351 wastewater Substances 0.000 claims abstract description 68
- 239000012528 membrane Substances 0.000 claims abstract description 56
- 238000007872 degassing Methods 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000011282 treatment Methods 0.000 claims abstract description 21
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 54
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 48
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 17
- 239000003814 drug Substances 0.000 claims description 16
- 239000010802 sludge Substances 0.000 claims description 14
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 11
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 238000009388 chemical precipitation Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 7
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 239000013505 freshwater Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 238000011284 combination treatment Methods 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 11
- 230000008929 regeneration Effects 0.000 description 10
- 238000011069 regeneration method Methods 0.000 description 10
- 239000013049 sediment Substances 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910052567 struvite Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- MXZRMHIULZDAKC-UHFFFAOYSA-L ammonium magnesium phosphate Chemical compound [NH4+].[Mg+2].[O-]P([O-])([O-])=O MXZRMHIULZDAKC-UHFFFAOYSA-L 0.000 description 1
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of ammonia-containing wastewater treatment of nuclear power plants, and particularly relates to a system for ammonia-containing wastewater treatment of a nuclear power plant, which comprises a wastewater collection tank, wherein the wastewater collection tank is connected with a sedimentation tank through a pipeline, a water inlet pump and a first dosing device group are arranged on a connecting pipeline of the wastewater collection tank and the sedimentation tank, the sedimentation tank is connected with a filter through a pipeline, the filter is connected with a degassing membrane component through a pipeline, a second dosing device is arranged on a connecting pipeline of the filter and the degassing membrane component, and a third dosing device is arranged on the degassing membrane component. Firstly removing a large amount of ammonia nitrogen in the regenerated wastewater of the condensate fine treatment of the nuclear power plant, and then carrying out fine treatment by a degassing membrane method, wherein the combination treatment effect of the two processes is better and the working state is stable.
Description
Technical Field
The invention relates to the technical field of ammonia-containing wastewater treatment of nuclear power plants, in particular to a system for ammonia-containing wastewater treatment of a nuclear power plant.
Background
The regenerated wastewater from the fine treatment of the condensate water of the nuclear power plant contains ammonia nitrogen with higher concentration, and the wastewater has high salt content and poor biochemistry. At present, only a simple neutralization treatment mode is adopted for the refined treatment and regeneration wastewater of the nuclear power plant, the pH value after treatment can reach the standard, but the ammonia nitrogen content is up to 1000mg/L and far exceeds the discharge limit value, and the ecological cycle near the discharged water body can be damaged to a certain extent. With the increasing strictness of environmental protection requirements, the treatment of the wastewater is a technical problem to be solved urgently in a nuclear power plant.
There are various methods for treating ammonia nitrogen in wastewater, such as stripping method, adsorption method, break point chlorination method, nitrification-denitrification method, etc. Although there are many methods available for treating wastewater containing ammonia nitrogen, the conditions for use are not the same. Besides high ammonia nitrogen content, the regenerated wastewater from the fine treatment of the condensate water of the nuclear power plant has the characteristics of high salt content and poor biodegradability.
Currently, there is no practical scheme for treating ammonia-containing wastewater in a nuclear power plant. In the conventional ammonia nitrogen removal method, the blowing-off method has low investment, but high energy consumption, and blown off gas forms secondary pollution; the adsorption method has the advantages of simple process, limited exchange capacity, frequent regeneration and suitability for removing low-concentration ammonia nitrogen; the break point chlorination method is a common denitrification process, is suitable for treating low-concentration ammonia nitrogen wastewater, has high consumption of liquid chlorine, higher cost and higher safety requirement on storage and use of liquid chlorine, and secondary pollution to the environment is caused by reaction byproducts chloramine and chlorinated organic matters; the nitrifying-denitrifying method has the defects of large occupied area and increased operation cost due to the need of adding carbon sources.
Disclosure of Invention
The invention aims to provide a system for treating ammonia-containing wastewater of a nuclear power plant, which comprises the following components: the wastewater collection tank is connected with the sedimentation tank through a pipeline, a water inlet pump and a first dosing device group are arranged on a connecting pipeline of the wastewater collection tank and the sedimentation tank, the sedimentation tank is connected with a filter through a pipeline, the filter is connected with a degassing membrane component through a pipeline, a second dosing device is arranged on a connecting pipeline of the filter and the degassing membrane component, and a third dosing device is arranged on the degassing membrane component;
the in-situ control cabinet, the connecting pipeline, the valve, various instruments and the like are all necessary components of the system, and are more applied in the prior art, and the components are not repeated here.
The wastewater in the wastewater collection tank is pumped into the sedimentation tank by a water inlet pump, is fed into the sedimentation tank after being dosed by a first dosing device group in the wastewater transmission process, most ammonia nitrogen in the wastewater is removed by a chemical sedimentation method, the solid part is positioned at the bottom of the sedimentation tank and is discharged by a mud pump,filtering the effluent of the sedimentation tank, adding alkali to enable NH in the effluent 4 + Conversion to gaseous NH 3 The effluent is separated out from the fresh water side of the degassing membrane component through a selective membrane, and dilute sulfuric acid is selected as an absorption liquid on the concentrated water side of the degassing membrane component, so that gaseous NH (NH) 3 Micropores passing through the membrane surfaces in the degassing membrane module enter the concentrate side and are absorbed by dilute sulfuric acid to be converted into ammonium sulfate.
Wherein the effective volume of the wastewater collection tank is designed according to the wastewater volume generated by one-time regeneration.
In the system, disodium hydrogen phosphate, magnesium chloride and sodium hydroxide are added into a pipeline from a water inlet pump to a sedimentation tank through a first dosing device group, and sodium hydroxide and sulfuric acid are regenerants for regeneration of the condensate fine treatment resin of the nuclear power plant, so that storage and metering equipment of the sodium hydroxide and the sulfuric acid of the system can be shared with fine treatment regeneration, and the disodium hydrogen phosphate and the magnesium chloride dosing devices are respectively provided with two pumps, wherein the volume of a single metering box is not less than the dosing amount of day and night.
Preferably, the first dosing device group consists of three dosing devices, wherein the three dosing devices are respectively a disodium hydrogen phosphate dosing device, a magnesium chloride dosing device and a sodium hydroxide dosing device, disodium hydrogen phosphate, magnesium chloride and sodium hydroxide are added into a pipeline from a water inlet pump to a sedimentation tank through the first dosing device group, so that most ammonia nitrogen in wastewater reacts with three substances to generate sediment, the sediment is removed through a chemical precipitation method, and a solid part is positioned at the bottom of the sedimentation tank.
Preferably, the second dosing device and the third dosing device are respectively a sodium hydroxide dosing device and a sulfuric acid dosing device, and the effluent of the sedimentation tank is filtered and then is subjected to alkali dosing by the second dosing device, so that NH in the effluent is obtained 4 + Conversion to gaseous NH 3 The effluent is separated out from the fresh water side of the degassing membrane component through a selective membrane, the concentrated water side of the degassing membrane component adopts dilute sulfuric acid as an absorption liquid, and the dilute sulfuric acid and gaseous NH are added through a third dosing device 3 Micropores passing through the membrane surfaces in the degassing membrane module enter the concentrate side and are absorbed by dilute sulfuric acid to be converted into ammonium sulfate.
Preferably, a liquid medicine mixing device is arranged in the sedimentation tank, a sludge pump is arranged at the bottom of the sedimentation tank and is used for discharging solids generated by chemical sedimentation, and the liquid medicine mixing device fully mixes the medicament in the sedimentation tank with the wastewater, so that the medicament and ammonia nitrogen in the wastewater can react to generate sedimentation.
Preferably, the liquid medicine mixing device comprises symmetrically arranged sliding blocks, sliding grooves are symmetrically arranged on the inner side wall of the sedimentation tank, the sliding blocks are slidably connected in the corresponding sliding grooves, a floating plate is fixedly connected between the two sliding blocks and is of a cavity structure, air holes are uniformly formed in the bottom wall of the cavity of the floating plate, an air inlet pipe is connected to the top wall of the cavity of the floating plate, a driver is connected to the floating plate, the floating plate is driven to reciprocate in the sedimentation tank along the vertical direction, ventilation is carried out in the air inlet pipe, air flow is discharged along the air holes, disturbance is generated in waste water, the medicament can be fully mixed with the waste water, the floating plate reciprocates in the vertical direction, the disturbance on the waste water is further increased, after a certain period of work, the floating plate stops moving, and waits for sedimentation, so that the medicament mixing effect is better, and the sedimentation effect is better.
Preferably, the driver comprises an external motor, the external motor is arranged on the outer side wall of the sedimentation tank, the output end of the external motor is connected with a rope roller, one end of a pull rope is connected to the rope roller, the other end of the pull rope is fixedly connected with the upper end of the sinking and floating plate, the lower end of the sinking and floating plate is connected with a gravity block through a connecting rope, and the external motor is driven to rotate forward and backward to retract and release the pull rope, so that the sinking and floating plate is lifted up or pulled down under the action of the gravity block.
Preferably, a pulley is arranged at the upper end of the sedimentation tank, the pull rope bypasses the pulley, and the pulley is arranged to enable the pull rope to move more smoothly.
Preferably, the liquid outlet end of the degassing membrane component is connected with a storage tank, and water output by the degassing membrane component enters the storage tank for storage.
Preferably, a booster pump is arranged on a connecting pipeline of the sedimentation tank and the filter, and the booster pump is further arranged to power the wastewater circulation.
Preferably, the output end of the sludge pump is connected with the sludge tank, and the sludge pump discharges the sediment at the bottom of the sedimentation tank to the sludge tank.
The beneficial effects of the invention are as follows:
(1) The system treats the regenerated wastewater of the condensate fine treatment of the nuclear power plant by combining a chemical precipitation method and a degassing membrane method, adopts a complete container design, and has the characteristics of small occupied area, simple installation, convenient operation and stable water outlet;
(2) The system adopts a chemical precipitation method as pretreatment, firstly removes a large amount of ammonia nitrogen in the regenerated wastewater of the condensate polishing of the nuclear power plant, and then carries out fine treatment by a degassing membrane method, and the combination treatment effect of the two processes is better and the working state is stable;
(3) The ammonia nitrogen substances in the wastewater are precipitated by a chemical precipitation method, and the generated magnesium ammonium phosphate (struvite) can be used as an inorganic compound fertilizer;
(4) The degassing membrane method has the advantages of no pollution, advanced process, simple and convenient operation and maintenance, and the like, and the recovered ammonia nitrogen can be converted into ammonium sulfate to be used as chemical fertilizer. In addition, the sodium hydroxide and sulfuric acid which are required by the system are regenerants for regenerating the condensate polishing resin of the nuclear power plant, and can share the acid-base storage facilities for polishing and regenerating, so that the system is simplified.
Drawings
FIG. 1 is a flow chart of a system of the present invention;
FIG. 2 is a schematic diagram of the interior of the sedimentation tank of the present invention;
FIG. 3 is a side cross-sectional view of the submerged plate of the present invention;
in the figure: 1-sliding block, 2-sinking and floating plate, 3-air hole, 4-air inlet pipe, 5-external motor, 6-rope roller, 7-stay rope, 8-gravity block and 9-pulley.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, a system for the treatment of ammonia-containing wastewater in a nuclear power plant, comprising: the wastewater collection tank is connected with the sedimentation tank through a pipeline, a water inlet pump and a first dosing device group are arranged on a connecting pipeline of the wastewater collection tank and the sedimentation tank, the sedimentation tank is connected with a filter through a pipeline, the filter is connected with a degassing membrane component through a pipeline, a second dosing device is arranged on a connecting pipeline of the filter and the degassing membrane component, and a third dosing device is arranged on the degassing membrane component;
the in-situ control cabinet, the connecting pipeline, the valve, various instruments and the like are all necessary components of the system, and are more applied in the prior art, and the components are not repeated here.
The wastewater in the wastewater collection tank is pumped into a sedimentation tank through a water inlet pump, the wastewater is fed into the sedimentation tank after being dosed through a first dosing device group in the wastewater transmission process, most ammonia nitrogen in the wastewater is removed through a chemical sedimentation method, a solid part is positioned at the bottom of the sedimentation tank and is discharged through a sludge discharge pump, and the discharged water of the sedimentation tank is filtered and then is added with alkali, so that NH in the discharged water 4 + Conversion to gaseous NH 3 Effluent is discharged from the fresh water side of the degassing membrane component after selective membrane precipitation, dilute sulfuric acid is selected as absorption liquid on the concentrated water side of the degassing membrane component, and gaseous NH is obtained 3 Micropores passing through the membrane surfaces in the degassing membrane module enter the concentrate side and are absorbed by dilute sulfuric acid to be converted into ammonium sulfate.
Wherein the effective volume of the wastewater collection tank is designed according to the wastewater volume generated by one-time regeneration.
In the system, disodium hydrogen phosphate, magnesium chloride and sodium hydroxide are added into a pipeline from a water inlet pump to a sedimentation tank through a first dosing device group, and sodium hydroxide and sulfuric acid are regenerants for regeneration of the condensate fine treatment resin of the nuclear power plant, so that storage and metering equipment of the sodium hydroxide and the sulfuric acid of the system can be shared with fine treatment regeneration, and the disodium hydrogen phosphate and the magnesium chloride dosing devices are respectively provided with two pumps, wherein the volume of a single metering box is not less than the dosing amount of day and night.
Specifically, the first dosing device group consists of three dosing devices, wherein the three dosing devices are a disodium hydrogen phosphate dosing device, a magnesium chloride dosing device and a sodium hydroxide dosing device respectively, disodium hydrogen phosphate, magnesium chloride and sodium hydroxide are added into a pipeline from a water inlet pump to a sedimentation tank through the first dosing device group, so that most ammonia nitrogen in wastewater reacts with three substances to generate sediment, the sediment is removed through a chemical precipitation method, and a solid part is positioned at the bottom of the sedimentation tank.
Specifically, the second dosing device and the third dosing device are respectively a sodium hydroxide dosing device and a sulfuric acid dosing device, and the effluent of the sedimentation tank is filtered and then is subjected to alkali dosing through the second dosing device, so that NH in the effluent is obtained 4 + Conversion to gaseous NH 3 The effluent is separated out from the fresh water side of the degassing membrane component through a selective membrane, the concentrated water side of the degassing membrane component adopts dilute sulfuric acid as an absorption liquid, and the dilute sulfuric acid and gaseous NH are added through a third dosing device 3 Micropores passing through the membrane surfaces in the degassing membrane module enter the concentrate side and are absorbed by dilute sulfuric acid to be converted into ammonium sulfate.
Specifically, be provided with liquid medicine mixing arrangement in the sedimentation tank, the bottom of the pool of sedimentation tank is equipped with the dredge pump, and the dredge pump is used for discharging the solid that chemical precipitation produced, liquid medicine mixing arrangement is with the medicament in the sedimentation tank and waste water intensive mixing, does benefit to medicament and the reaction of ammonia nitrogen in the waste water and generates the sediment.
Specifically, the liquid medicine mixing device comprises slide blocks 1 which are symmetrically arranged, sliding grooves are symmetrically formed in the inner side walls of the sedimentation tank, the slide blocks 1 are in sliding connection with the corresponding sliding grooves, a sinking and floating plate 2 is fixedly connected between the two slide blocks 1, the sinking and floating plate 2 is of a cavity structure, air holes 3 are uniformly formed in the bottom wall of the cavity of the sinking and floating plate 2, an air inlet pipe 4 is connected to the top wall of the cavity of the sinking and floating plate 2, a driver is connected to the sinking and floating plate 2, the driver drives the sinking and floating plate 2 to enable the sinking and floating plate 2 to reciprocate in the sedimentation tank in the vertical direction, air is ventilated into the air inlet pipe 4, air flows are discharged along the air holes 3, disturbance is generated in waste water, medicaments can be fully mixed with the waste water, the reciprocating displacement of the sinking and floating plate 2 further increases the disturbance to the waste water, after a certain time of working, the sinking and floating plate 2 stops moving, and waits for sedimentation, so that the medicament mixing effect is better, and the sedimentation effect is better.
Specifically, the driver includes external motor 5, external motor 5 installs on the lateral wall of sedimentation tank, the output of external motor 5 is connected with rope roller 6, be connected with the one end of stay cord 7 on the rope roller 6, the other end of stay cord 7 with the upper end fixed connection of heave plate 2, the lower extreme of heave plate 2 is connected with gravity piece 8 through connecting the rope, through external motor 5 forward, reverse rotation, drives rope roller 6 forward, reverse rotation, receive and releases stay cord 7 to lift heave plate 2 or pull down heave plate 2 under gravity piece 8 effect.
Specifically, the upper end of sedimentation tank is provided with pulley 9, stay cord 7 bypasses pulley 9, pulley 9's setting makes stay cord 7 remove more smooth.
Specifically, the liquid outlet end of the degassing membrane component is connected with a storage tank, and water output by the degassing membrane component enters the storage tank for storage.
Specifically, a booster pump is arranged on a connecting pipeline of the sedimentation tank and the filter, and the booster pump is arranged to further provide power for wastewater circulation.
Specifically, the output end of the sludge pump is connected with the sludge tank, and the sludge pump discharges sediment at the bottom of the sedimentation tank to the sludge tank.
Working principle: in the system, a wastewater collection tank is connected with a sedimentation tank through a pipeline, a water inlet pump and a first dosing device group are arranged on a connecting pipeline of the wastewater collection tank and the sedimentation tank, the sedimentation tank is connected with a filter through a pipeline, the filter is connected with a degassing membrane component through a pipeline, a second dosing device is arranged on a connecting pipeline of the filter and the degassing membrane component, and a third dosing device is arranged on the degassing membrane component;
the wastewater in the wastewater collection tank is pumped into the sedimentation tank by a water inlet pump, and is fed into the sedimentation tank after being dosed by a first dosing device group in the wastewater transmission process, and the wastewater is largeRemoving part of ammonia nitrogen by chemical precipitation, discharging solid part at the bottom of the sedimentation tank by a sludge pump, filtering the water discharged from the sedimentation tank, adding alkali to make NH in the water 4 + Conversion to gaseous NH 3 The effluent is separated out from the fresh water side of the degassing membrane component through a selective membrane, and dilute sulfuric acid is selected as an absorption liquid on the concentrated water side of the degassing membrane component, so that gaseous NH (NH) 3 Micropores passing through the membrane surfaces in the degassing membrane module enter the concentrate side and are absorbed by dilute sulfuric acid to be converted into ammonium sulfate.
Disodium hydrogen phosphate, magnesium chloride and sodium hydroxide are added into a pipeline from a water inlet pump to a sedimentation tank through a first dosing device group, and sodium hydroxide and sulfuric acid are regenerants for regeneration of the nuclear power plant condensate water refined treatment resin, so that storage and metering equipment of sodium hydroxide and sulfuric acid of the system can be shared with refined treatment regeneration, and the disodium hydrogen phosphate and magnesium chloride dosing devices are respectively provided with two tanks and two pumps, wherein the volume of a single metering tank is not less than the dosing amount of day and night.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The system for treating the ammonia-containing wastewater in the nuclear power plant is characterized by comprising a wastewater collection tank, wherein the wastewater collection tank is connected with a sedimentation tank through a pipeline, a water inlet pump and a first dosing device group are arranged on a connecting pipeline of the wastewater collection tank and the sedimentation tank, the sedimentation tank is connected with a filter through a pipeline, the filter is connected with a degassing membrane component through a pipeline, a second dosing device is arranged on a connecting pipeline of the filter and the degassing membrane component, a third dosing device is arranged on the degassing membrane component, and the degassing membrane component comprises a selective membrane;
the wastewater in the wastewater collection tank is sent into the sedimentation tank through a water inlet pump, and is sent to the sedimentation tank after being dosed through the first dosing device group in the wastewater transmission processThe ammonia nitrogen in the wastewater is removed by a chemical precipitation method in the sedimentation tank, and the effluent of the sedimentation tank is filtered and then added with alkali to ensure that NH in the effluent 4 + Conversion to gaseous NH 3 The water is discharged from the fresh water side of the degassing membrane component after being separated out by the selective membrane, dilute sulfuric acid is selected as an absorption liquid from the concentrated water side of the degassing membrane component, and gaseous NH is obtained 3 Passing through micropores on the membrane surface in the degassing membrane component, entering a concentrated water side, and being absorbed by dilute sulfuric acid to be converted into ammonium sulfate;
the first dosing device group consists of three dosing devices, wherein the three dosing devices are respectively a disodium hydrogen phosphate dosing device, a magnesium chloride dosing device and a sodium hydroxide dosing device;
the second dosing device and the third dosing device are respectively a sodium hydroxide dosing device and a sulfuric acid dosing device;
a liquid medicine mixing device is arranged in the sedimentation tank, and a sludge pump is arranged at the bottom of the sedimentation tank and used for discharging solids generated by chemical sedimentation;
the liquid medicine mixing device comprises sliding blocks (1) which are symmetrically arranged, sliding grooves are symmetrically formed in the inner side walls of the sedimentation tank, the sliding blocks (1) are connected to the corresponding sliding grooves in a sliding mode, two sinking and floating plates (2) are fixedly connected between the sliding blocks (1), the sinking and floating plates (2) are of cavity structures, air holes (3) are uniformly formed in the bottom walls of the cavities of the sinking and floating plates (2), air inlet pipes (4) are connected to the top walls of the cavities of the sinking and floating plates (2), and a driver is connected to the sinking and floating plates (2) and drives the sinking and floating plates (2) to enable the sinking and floating plates to reciprocate in the sedimentation tank along the vertical direction.
2. The system for treating ammonia-containing wastewater in a nuclear power plant according to claim 1, wherein the driver comprises an external motor (5), the external motor (5) is installed on the outer side wall of the sedimentation tank, the output end of the external motor (5) is connected with a rope roller (6), one end of a pull rope (7) is connected to the rope roller (6), the other end of the pull rope (7) is fixedly connected with the upper end of the sink-and-float plate (2), and the lower end of the sink-and-float plate (2) is connected with a gravity block (8) through a connecting rope.
3. A system for the treatment of ammonia-containing wastewater in a nuclear power plant according to claim 2, characterized in that the upper end of the sedimentation tank is provided with a pulley (9), the pull rope (7) being wound around the pulley (9).
4. A system for the treatment of ammonia-containing wastewater from a nuclear power plant according to claim 1 and wherein the liquid outlet end of said degassing membrane module is connected to a reservoir.
5. A system for the treatment of ammonia-containing wastewater in a nuclear power plant according to claim 1, characterized in that a booster pump is provided on the connecting pipe of the sedimentation tank and the filter.
6. A system for the treatment of ammonia-containing wastewater from a nuclear power plant according to claim 1 and wherein the output of said sludge pump is connected to a sludge basin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311499048.7A CN117228901A (en) | 2023-11-13 | 2023-11-13 | System for be used for nuclear power plant to contain ammonia waste water treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311499048.7A CN117228901A (en) | 2023-11-13 | 2023-11-13 | System for be used for nuclear power plant to contain ammonia waste water treatment |
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| CN117228901A true CN117228901A (en) | 2023-12-15 |
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| CN202311499048.7A Pending CN117228901A (en) | 2023-11-13 | 2023-11-13 | System for be used for nuclear power plant to contain ammonia waste water treatment |
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| CN211245640U (en) * | 2019-06-26 | 2020-08-14 | 山西光大焦化气源有限公司 | Coking wastewater sedimentation tank |
| CN112159001A (en) * | 2020-10-21 | 2021-01-01 | 齐鲁工业大学 | Full-automatic car washing wastewater's circulating equipment |
| CN218435176U (en) * | 2022-09-20 | 2023-02-03 | 中国煤炭地质总局勘查研究总院 | Sedimentation tank for treating well kick of underground mine |
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2023
- 2023-11-13 CN CN202311499048.7A patent/CN117228901A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102964003A (en) * | 2012-11-22 | 2013-03-13 | 中节能六合天融环保科技有限公司 | Method for treating ammonia nitrogen in wastewater by using integrated process |
| CN109626715A (en) * | 2018-12-07 | 2019-04-16 | 江苏维尔利环保科技股份有限公司 | The method for reducing ammonia load in processing percolate biochemical system |
| CN211245640U (en) * | 2019-06-26 | 2020-08-14 | 山西光大焦化气源有限公司 | Coking wastewater sedimentation tank |
| CN112159001A (en) * | 2020-10-21 | 2021-01-01 | 齐鲁工业大学 | Full-automatic car washing wastewater's circulating equipment |
| CN218435176U (en) * | 2022-09-20 | 2023-02-03 | 中国煤炭地质总局勘查研究总院 | Sedimentation tank for treating well kick of underground mine |
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