CN111072194A - High salt water removes hard COD integrated device that removes - Google Patents
High salt water removes hard COD integrated device that removes Download PDFInfo
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- CN111072194A CN111072194A CN201911268716.9A CN201911268716A CN111072194A CN 111072194 A CN111072194 A CN 111072194A CN 201911268716 A CN201911268716 A CN 201911268716A CN 111072194 A CN111072194 A CN 111072194A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 135
- 150000003839 salts Chemical class 0.000 title claims description 7
- 230000003647 oxidation Effects 0.000 claims abstract description 59
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 59
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 34
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 34
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000008929 regeneration Effects 0.000 claims description 16
- 238000011069 regeneration method Methods 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 238000011001 backwashing Methods 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 5
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000002195 synergetic effect Effects 0.000 description 5
- 239000012528 membrane Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000013505 freshwater Substances 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
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000011268 retreatment Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention provides a high-salinity water hardness and COD removal integrated device, which solves the problems that in the prior art, an ion exchange resin tank is required to be added independently to avoid the problems of an advanced oxidation treatment unit, the manufacturing cost is high, the occupied area is large, and a plurality of control points are needed. The device comprises a softening zone, a buffer zone and a high-grade oxidation zone which are integrally arranged along the water flow direction; the advanced oxidation area is positioned above the softening area, and the buffer area is positioned on one side of the advanced oxidation area and the softening area; the upper part of the softening zone is provided with a water inlet component, and the lower part of the softening zone is provided with ion exchange resin; a flap valve I and a flap valve II are arranged between the softening area and the buffer area along the water flow direction; a flap valve III is arranged in the buffer area; a hydrogen peroxide dosing pipe is arranged at the water inlet of the advanced oxidation zone, and a plurality of guide walls and ultraviolet lamp tubes which are arranged alternately are arranged in the advanced oxidation zone; a water outlet pipe and a backflow component are arranged at the water outlet; the backflow component comprises a COD online monitor and a multi-stage backflow pipe.
Description
Technical Field
The invention relates to water treatment equipment, in particular to a high-salinity water hardness-removing and COD-removing integrated device which is used for removing calcium and magnesium hardness in high-salinity wastewater and reducing COD in the wastewater.
Background
The high-salinity wastewater is a hotspot for research and attention in recent years, a plurality of engineering application cases exist, the rear-end membrane system and evaporative crystallization scaling are obvious due to overhigh hardness of calcium and magnesium, the stability and reliability of operation are always the focus of attention, and the high-salinity wastewater contains complex and various substances and is difficult to degrade, so that the evaporative crystallizer and a pipeline are blocked due to poor treatment, the quality of product salt is reduced, and even qualified product salt cannot be separated. The effect of a certain process is not good when the process is simply selected, and the synergistic effect generated by adopting a plurality of processing methods can achieve the effect of double the result with half the effort and better effect.
The front end of the traditional process adopts an ion exchange resin tank to soften the wastewater, mainly removes the hardness of calcium and magnesium in the water, then the wastewater is concentrated by a multi-stage membrane, the produced fresh water is reused, and the produced concentrated water enters an advanced oxidation treatment unit. However, since the hardness of calcium and magnesium in the concentrated water is obviously increased after the concentration by the multi-stage membrane, the following problems are caused by the high hardness: 1) scaling on the surface of the ultraviolet lamp tube affects the service life and normal operation of equipment; 2) blocking the advanced oxidation treatment unit to influence the removal efficiency of COD; 3) the quality of the salt is reduced and becomes a dangerous waste product.
For the above problems, in the design requirements, a secondary softening process needs to be added between membrane concentration and advanced oxidation treatment, i.e. a primary ion exchange resin tank is separately arranged, the method has the advantages of high construction cost, large floor area and multiple control points, and in actual application, a softening system cannot operate due to large water quality change, or resin is difficult to regenerate after failure, and the softening effect is poor. Therefore, in current practical operation, the feasibility of this method is poor.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, an ion exchange resin tank is required to be added for avoiding the problem of an advanced oxidation treatment unit, the manufacturing cost is high, the occupied area is large, and a plurality of control points are needed, and provides a high-salt water hardness removal and COD removal integrated device which can be suitable for treating concentrated water or wastewater with the hardness of less than 200mg/L (calculated by calcium carbonate).
In order to achieve the purpose, the technical solution provided by the invention is as follows:
the high-salt water hardness-removing and COD-removing integrated device is characterized by comprising a softening zone, a buffer zone and a high-grade oxidation zone which are integrally arranged along the water flow direction; wherein, the advanced oxidation zone is positioned above the softening zone, and the buffer zone is positioned at one side of the advanced oxidation zone and the softening zone;
the upper part of the softening zone is provided with a water inlet component, and the lower part of the softening zone is provided with ion exchange resin; the water inlet assembly comprises a water inlet pipe and a V-shaped water inlet channel; the V-shaped water inlet channel is positioned below the water inlet pipe, is uniformly provided with a plurality of through holes along the length direction and is used for uniformly distributing water on the ion exchange resin, so that the effective contact area of the incoming water and the ion exchange resin is increased, and the working exchange capacity of the surface of the ion exchange resin is fully utilized; the bottom of the ion exchange resin is provided with a long-handle filter head;
a flap valve I and a flap valve II are arranged between the softening zone and the buffer zone along the water flow direction;
a flap valve III is arranged in the buffer area;
a hydrogen peroxide dosing pipe is arranged at a water inlet of the advanced oxidation zone; the advanced oxidation zone is internally provided with a plurality of guide walls and ultraviolet lamps which are arranged at intervals, the synergistic effect of hydroxyl radicals, ultraviolet rays and hydrogen peroxide generated by the combination of the ultraviolet lamps and the hydrogen peroxide is adopted to reduce and remove COD in the high-salinity water, the continuous guide walls are adopted to divide the advanced oxidation zone into a plurality of S-shaped channels, the contact probability of the high-salinity water with the hydroxyl radicals, the ultraviolet rays and the hydrogen peroxide is improved, the reaction time is prolonged, and the reaction efficiency is improved; a water outlet pipe and a backflow component are arranged at a water outlet of the advanced oxidation zone; the backflow component comprises a COD online monitor arranged on the water outlet pipe and a plurality of stages of backflow pipes arranged at different positions of the advanced oxidation area along the water flow direction, and each stage of backflow pipe is provided with a regulating valve.
Furthermore, a buffer area water outlet channel is arranged at the water outlet of the buffer area, so that the impact force of water flow can be reduced.
Furthermore, a water outlet channel of the advanced oxidation zone is also arranged at the water outlet of the advanced oxidation zone; the water outlet pipe is connected with a water outlet channel of the advanced oxidation zone.
Furthermore, the device also comprises a regeneration and back-flushing unit which is used for flushing and regenerating the ion exchange resin in the softening zone by using a regeneration liquid; the water inlet pipe of the regeneration and back-washing unit is positioned below the ion exchange resin, and the water outlet pipe is positioned above the ion exchange resin.
Further, the regulating valve is an electric regulating valve and is linked with the COD on-line monitor.
Furthermore, the softening area and the advanced oxidation area are both two, and the buffer area is one; the two advanced oxidation zones are respectively positioned above the two softening zones and share the buffer zone, so that the reasonable layout is realized, and the high-salt water treatment capacity of the device is increased.
Furthermore, the multistage return pipe is a three-stage return pipe, and effluent can be divided into three stages for backflow to be reprocessed according to the size of COD in the effluent.
Furthermore, the softening zone, the buffer zone and the advanced oxidation zone are integrally arranged by adopting a concrete structure; and the side wall of the softening zone and the top of the buffer zone are provided with access holes, so that the device is convenient for workers to maintain and overhaul.
Furthermore, an electric valve is arranged on the water outlet pipe.
Furthermore, the regeneration liquid in the regeneration and back washing unit adopts 3-5% of hydrochloric acid and 3-5% of sodium hydroxide, and the ion exchange resin can be washed alternately.
The invention has the advantages that:
1. the invention carries out integrated design on the calcium and magnesium removal hardness of the softening zone and the COD removal of the advanced oxidation zone, thereby not only saving the occupied area, reducing the cost and being convenient to control, but also leading the high-salt water treatment process to be more centralized. Wherein, the water inlet of the softening zone adopts a V-shaped water inlet channel, the V-shaped water inlet channel distributes water uniformly along the length direction, and the working exchange capacity of the ion exchange resin is fully utilized; the whole device adopts three times of flap valves to control the water flow communication of the softening zone, the buffer zone and the advanced oxidation zone, realizes unmanned management, reduces the use number of intermediate water pumps, saves cost, improves the operation reliability and reduces the operation failure rate; the advanced oxidation zone adopts a mode of combining an ultraviolet lamp tube and hydrogen peroxide to generate the synergistic effect of hydroxyl radicals, ultraviolet light and hydrogen peroxide; the ultraviolet lamp tubes and the guide walls are arranged alternately, so that the contact area of oxidizing groups, oxidizing agents and the like with organic matters in the wastewater is increased, and the oxidation efficiency and the oxidation effect are improved; meanwhile, in order to ensure that the effluent is qualified, a backflow assembly is arranged at the water outlet of the advanced oxidation area, the effluent treatment effect of the advanced oxidation area is monitored on line, effluent backflow is selectively adjusted, and secondary treatment is carried out.
2. In the invention, the water outlets of the buffer zone and the advanced oxidation zone are provided with water outlet channels, so that the impact force of water flow can be greatly reduced.
Drawings
FIG. 1 is a high salt water hardness removal and COD removal integrated device according to an embodiment of the invention.
The reference numbers are as follows:
a-a softening zone, B-a buffer zone, C-a high-grade oxidation zone, 1-a water inlet pipe, 2-a water outlet pipe, 3-a water inlet pipe, 4-a hydrogen peroxide dosing pipe, 5-a water outlet pipe, 6-a long-handle filter head, 7-ion exchange resin, 8-an access hole, 9-V-shaped water inlet channels, 10-an ultraviolet lamp tube, 11-a flap valve I, 12-a flap valve II, 13-a flap valve III, 14-a high-grade oxidation zone water outlet channel, 15-an electric valve, 16-a regulating valve and 17-a return pipe; 19-guide wall, 20-buffer zone water outlet channel.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
as shown in FIG. 1, the high-salt water hardness-removing and COD-removing integrated device adopts a concrete structure and comprises a softening area A, a buffer area B and a high-grade oxidation area C which are arranged along the water flow direction; besides, the device also comprises a regeneration and back-flushing unit. The softening area A and the advanced oxidation area C are both two, and the buffer area B is one; the two advanced oxidation zones C are respectively positioned on the left side and the right side and above the two softening zones A, and the buffer zone B is positioned in the middle and serves as a shared buffer zone B.
The upper part of the softening area A is provided with a water inlet component, and the lower part is provided with an ion exchange resin 7.
The water inlet assembly comprises a water inlet pipe 1 and a V-shaped water inlet channel 9; the V-shaped water inlet channel 9 is positioned below the water inlet pipe 1, is uniformly provided with a plurality of through holes along the length direction, and is used for uniformly distributing water to the ion exchange resin 7, improving the effective contact area of the incoming water and the ion exchange resin 7 and fully utilizing the working exchange capacity of the surface of the ion exchange resin 7; the bottom of the ion exchange resin 7 is provided with a long-handle filter head 6.
The water inlet pipe 3 of the regeneration and back flushing unit is positioned below the ion exchange resin 7, and the water outlet pipe 2 is positioned above the ion exchange resin 7; the ion exchange resin 7 used in the softening zone a is washed and regenerated with a regeneration liquid. The regeneration liquid adopts 3-5% hydrochloric acid and 3-5% sodium hydroxide.
A flap valve I11 and a flap valve II 12 are arranged between the softening area A and the buffer area B along the water flow direction, and a flap valve III 13 is arranged in the buffer area B along the water flow direction. The three flap valves are all installed on the corresponding tank body through bolts and nuts.
The water outlet of the buffer area B is provided with a buffer area B water outlet channel 20 for reducing the impact force of water flow.
A hydrogen peroxide dosing pipe 4 is arranged at the water inlet of the advanced oxidation zone C. A plurality of flow guide walls 19 and ultraviolet lamp tubes 10 are vertically arranged in the advanced oxidation zone C at intervals, and two ends of each ultraviolet lamp tube 10 are fixed in holes reserved at the bottom and the top of the advanced oxidation zone C through hoops, bolts and nuts. The synergistic effect of hydroxyl radicals, ultraviolet rays and hydrogen peroxide generated by the combination of the ultraviolet lamp tube 10 and the hydrogen peroxide is adopted to reduce and remove COD in the high-salinity water, and the continuous flow guide walls 19 are adopted to divide the advanced oxidation zone C into a plurality of S-shaped channels, so that the contact probability of the high-salinity water with the hydroxyl radicals, the ultraviolet rays and the hydrogen peroxide is improved, the reaction time is prolonged, and the reaction efficiency is improved. The water outlet of the advanced oxidation zone C is provided with an outlet channel 14 of the advanced oxidation zone C, and a water outlet pipe 5 and a backflow component which are communicated with the outlet channel. The backflow component comprises a COD online monitor arranged on the water outlet pipe 5 and three-stage backflow pipes 17 arranged at different positions of the advanced oxidation zone C along the water flow direction; be provided with motorised valve 15 on the outlet pipe 5, all be provided with electrical control valve on every grade back flow 17, electrical control valve and COD on-line monitoring appearance linkage setting, COD on-line monitoring appearance feeds back the monitoring data of COD content in the play water to controlling means promptly, controlling means compares the back with this data rather than the data of storage, opens the electrical control valve on the back flow of corresponding rank, makes play water backward flow to suitable region, carries out reprocessing, this controlling means adopts prior art can.
In order to facilitate feeding and maintenance, the side wall of the softening area A and the top of the buffer area B are provided with maintenance ports 8.
The high-salt water is uniformly distributed on the ion exchange resin 7 from the water inlet pipe 1 through the reserved through holes on the V-shaped water inlet channel 9, the hardness of calcium and magnesium is softened and removed in the softening area A, and the scaling phenomenon of subsequent treatment process units is avoided. The wastewater flows to a buffer zone B through an ion exchange resin 7, a long-handle filter head 6, a flap valve I11 and a flap valve II 12, and the effluent of the buffer zone B reaches a water outlet channel 20 of the buffer zone B through a flap valve III 13; then, turbulent flow and vortex flow are formed through an S-shaped water flow channel of the advanced oxidation zone C, hydrogen peroxide is added through a hydrogen peroxide adding pipe 4, the hydrogen peroxide and ultraviolet light generated by the ultraviolet lamp tube 10 in the S-shaped channel have synergistic effect to generate hydroxyl radicals with larger concentration, and the hydroxyl radicals, the ultraviolet light and the hydrogen peroxide can remove organic matters in the wastewater under the combined action to further reduce the COD content in the wastewater. If the COD content in the effluent of the water outlet pipe 5 is higher and does not meet the effluent requirement, the electric regulating valves of the return pipes 17 at all stages can be selectively opened or closed according to the actual running condition for retreatment.
After the ion exchange resin 7 is operated for a long time, it is required to perform a regeneration treatment. The regeneration liquid and the backwashing water enter the long-handle filter head 6 through the water inlet pipe 3 to submerge the whole ion exchange resin 7. Regenerated liquid and backwashing water are discharged to an external neutralization water tank through a water discharge pipe 2, and at the moment, three flap valves are automatically in a closed state, so that waste water in the buffer area B and the advanced oxidation area C can be effectively prevented from flowing backwards to the softening area A.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present disclosure.
Claims (10)
1. The utility model provides a high salt water removes hard COD integrated device that removes which characterized in that: comprises a softening zone, a buffer zone and an advanced oxidation zone which are integrally arranged along the water flow direction; wherein, the advanced oxidation zone is positioned above the softening zone, and the buffer zone is positioned at one side of the advanced oxidation zone and the softening zone;
the upper part of the softening zone is provided with a water inlet component, and the lower part of the softening zone is provided with ion exchange resin (7); the water inlet assembly comprises a water inlet pipe (1) and a V-shaped water inlet channel (9); the V-shaped water inlet channel (9) is positioned below the water inlet pipe (1), is uniformly provided with a plurality of through holes along the length direction and is used for uniformly distributing water on the ion exchange resin (7); a long-handle filter head (6) is arranged at the bottom of the ion exchange resin (7);
a flap valve I (11) and a flap valve II (12) are arranged between the softening zone and the buffer zone along the water flow direction;
a flap valve III (13) is arranged in the buffer area;
a hydrogen peroxide dosing pipe (4) is arranged at a water inlet of the advanced oxidation zone; a plurality of guide walls (19) and ultraviolet lamp tubes (10) which are arranged alternately are arranged in the advanced oxidation zone; a water outlet pipe (5) and a backflow component are arranged at the water outlet of the advanced oxidation area; the backflow component comprises a COD (chemical oxygen demand) online monitor arranged on the water outlet pipe (5) and a plurality of stages of backflow pipes (17) arranged at different positions of the advanced oxidation zone along the water flow direction, and each stage of backflow pipe (17) is provided with a regulating valve (16).
2. The integrated device for hardness removal and COD removal of high-salinity water according to claim 1 is characterized in that: a buffer area water outlet channel (20) is arranged at the water outlet of the buffer area.
3. The integrated device for hardness removal and COD removal of high-salinity water according to claim 1 or 2, is characterized in that: an advanced oxidation zone water outlet channel (14) is also arranged at the water outlet of the advanced oxidation zone; the water outlet pipe (5) is connected with a water outlet channel (14) of the advanced oxidation zone.
4. The integrated device for hardness removal and COD removal of high-salinity water according to claim 3, is characterized in that: the device also comprises a regeneration and back-washing unit which is used for washing and regenerating the ion exchange resin (7) in the softening zone by using a regeneration liquid; the water inlet pipe (3) of the regeneration and back-flushing unit is positioned below the ion exchange resin (7), and the water outlet pipe (2) is positioned above the ion exchange resin (7).
5. The integrated device for hardness removal and COD removal of high-salinity water according to claim 4, is characterized in that: the regulating valve (16) is an electric regulating valve and is linked with the COD on-line monitor.
6. The integrated device for hardness removal and COD removal of high-salinity water according to claim 5, is characterized in that: the softening area and the advanced oxidation area are both two, and the buffer area is one; the two advanced oxidation areas are respectively positioned above the two softening areas and share the buffer area.
7. The integrated device for hardness removal and COD removal of high-salinity water according to claim 6, is characterized in that: the multistage return pipe (17) comprises a three-stage return pipe.
8. The integrated device for hardness removal and COD removal of high-salinity water according to claim 7 is characterized in that:
the softening zone, the buffer zone and the advanced oxidation zone are integrally arranged by adopting a concrete structure, and the side wall of the softening zone and the top of the buffer zone are provided with access holes (8).
9. The integrated device for hardness removal and COD removal of high-salinity water according to claim 8 is characterized in that:
an electric valve (15) is arranged on the water outlet pipe (5).
10. The integrated device for hardness removal and COD removal of high-salinity water according to claim 9, is characterized in that:
the regeneration liquid in the regeneration and back washing unit adopts hydrochloric acid with the mass concentration of 3-5% and sodium hydroxide with the mass concentration of 3-5%.
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| CN201911268716.9A CN111072194A (en) | 2019-12-11 | 2019-12-11 | High salt water removes hard COD integrated device that removes |
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| CN201911268716.9A CN111072194A (en) | 2019-12-11 | 2019-12-11 | High salt water removes hard COD integrated device that removes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115818874A (en) * | 2022-11-30 | 2023-03-21 | 中新联科环境科技(安徽)有限公司 | Treatment method of high-salinity wastewater |
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