CN101973657A - Processing device and processing method for removing nitrate from ground water - Google Patents
Processing device and processing method for removing nitrate from ground water Download PDFInfo
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- CN101973657A CN101973657A CN 201010522789 CN201010522789A CN101973657A CN 101973657 A CN101973657 A CN 101973657A CN 201010522789 CN201010522789 CN 201010522789 CN 201010522789 A CN201010522789 A CN 201010522789A CN 101973657 A CN101973657 A CN 101973657A
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Abstract
The invention discloses a processing device for removing nitrate from ground water, which mainly comprises a water outlet pipe, a quartz sand filter unit, a backwash water inlet pipe, a magnetic ion exchange (MIEX) resin processing unit, a water inlet, a first peristaltic pump, a second peristaltic pump and an MIEX resin regenerating unit, wherein the top part of the processing device is provided with a water outlet pipe; the quartz sand filter unit is arranged below the outlet pipe; a water distribution pore plate is arranged at the bottom of the quartz sand filter unit; the surface of the water distribution pore plate is covered by water filtering filter cloth; the backwash water inlet pipe is arranged below the quartz sand filter unit, and the MIEX resin processing unit is arranged below the backwash water inlet pipe; the water inlet is arranged at the bottom of the processing device; a water inlet water distribution pore plate is arranged above the water inlet; an outlet for resin to be regenerated of the MIEX resin processing unit is connected with the inlet of the MIEX resin regenerating unit through the first peristaltic pump; and the outlet of the MIEX resin regenerating unit is connected with the inlet for the resin to be regenerated of the MIEX resin processing unit.
Description
Technical field
The present invention relates to the drinking water treatment field, specifically at the treatment unit and the method for the safe and efficient removal of nitrate in groundwater.
Background technology
With underground water is in the tap water at water source, and azotate pollution causes that many countries pay close attention to.Because ooze under the seepage of agricultural fertilizer, sanitary sewage and nitrogenous trade effluent, the leaching of solid waste, the factor such as recharge of sewage, the situation that China's nitrate in groundwater is polluted is more serious, especially northern area.The too high tap water of nitrate content can cause multiple health problem, " the blue baby's disease " that is commonly called as is exactly because the infant has used food or the water that contains nitrate, cause anoxic in the body and the bluish voilet speckle on skin, occurs, and, can cause death when serious with dyspneic symptom.For this reason, " drinking water sanitary standard " (GB5749-2006) carried out comparatively strict restriction (one required value is 10mg/L, is 20mg/L during the underground water source restriction) to this.
In recent years, domestic and international many investigators study the treatment and disposal technology of groundwater azotate pollution, and have obtained achievement preferably.The removal technology of nitrate is broadly divided into physical chemistry, chemistry and biologic treating technique.Physical chemistry method mainly contains distillation, electrodialysis, reverse osmosis, ion exchange method etc., and its removal efficient to the nitrate in the water is lower, but cost is higher; The nitrate that chemical method is removed in the underground water mainly is by utilize the nitrate in certain reductive agent (reductive agent commonly used has ferrous iron, hydrogen etc.) reduction or the catalytic reduction water, the further research but it is still needed on economy and practicality; Biologic treating technique is removed the nitrate in the underground water, mainly be to utilize denitrifying bacteria with the bioprocess of nitrate reduction for nitrogen, its concrete application form mainly comprises two kinds of biology in situ denitrogenation, reactor organisms denitrogenations, but has some problems in actual applications equally.
Ion exchange technique is because advantage such as its simple, efficient, renewable and cost is relatively low is subjected to extensive concern at present.And domestic in recent years also have research and develop out the report that nitrate radical is had better selectivity ion exchange resin, but do not see the report of its practical application as yet.Therefore, further preferably be applicable to the novel ion exchange resin of nitrate in groundwater, and rationally determine the form of its practical application that the removal of nitrate in groundwater is had positive meaning.
Summary of the invention
The present invention is low for the removal efficient to nitrate in the water that overcomes the prior art existence, the shortcoming of economic and practical difference, and a kind of treatment unit and treatment process that is used to remove nitrate in groundwater is provided, and can remove the nitrate in the water efficiently, safely.
Technical scheme of the present invention is: a kind of treatment unit that is used to remove nitrate in groundwater, mainly by rising pipe, the quartz sand filtration unit, the back flushing water inlet pipe, MIEX plastic resin treatment unit, water-in, first peristaltic pump, second peristaltic pump, MIEX resin regeneration unit is formed, top at treatment unit is provided with rising pipe, have the quartz sand filtration unit at rising pipe, the quartz sand filtration unit bottom is provided with the water distribution orifice plate, water distribution orifice plate surface coverage has the drainage filter cloth, have the back flushing water inlet pipe in the quartz sand filtration unit, have MIEX plastic resin treatment unit at the back flushing water inlet pipe, bottom at treatment unit is provided with water-in, above water-in, be provided with into water water distribution orifice plate, surface coverage at water inlet water distribution orifice plate has into water filter cloth, water inlet filter cloth density is less than the drainage filter cloth, the MIEX plastic resin treatment is unitary treats that the regenerating resin outlet is connected with MIEX resin regeneration unit inlet by first peristaltic pump, and the unitary outlet of MIEX resin regeneration is connected with the unitary regenerating resin import of MIEX plastic resin treatment by second peristaltic pump.
Described quartz sand filtration unit is provided with quartz sand filtration layer and supporting layer from top to bottom, and quartz sand adopts grating quartz sand, thickness of filter bed＞40cm; Being provided with of supporting layer should guarantee that highly quartz sand does not leak down.
Distance＞10cm between resin boundary surface when described quartz sand filtration unit bottom and the operation of MIEX plastic resin treatment unit.
Described rising pipe is a perforated pipe, is provided with sterilizing agent and adds mouth on rising pipe, is provided with dosing mouth before the described water-in.
Described back flushing water inlet pipe is a perforated pipe, and position of opening is located at directly over the backwash tube.
Use the described treatment unit that is used for removing nitrate in groundwater to remove the method for water nitrate, adopting the upward flow operation scheme to enter MIEX plastic resin treatment unit after the water-in of pending water bottom treatment unit tentatively filters through water inlet water distribution orifice plate and water inlet filter cloth handles, by entering the quartz sand filtration unit after process water distribution orifice plate of the water after the MIEX plastic resin treatment and the filtration of drainage filter cloth, behind chlorination, enter clean water basin or be delivered to the user by the rising pipe collection through secondary pumping station through the water behind the quartz sand filtration;
Passing through for the treatment of in the MIEX plastic resin treatment unit that regenerating resin continues treats that with MIEX plastic resin treatment unit first peristaltic pump that the regenerating resin outlet is connected is transferred in the MIEX resin regeneration unit by design discharge, and the resin behind MIEX plastic resin treatment regeneration unit is provided by import by regenerating resin in the MIEX plastic resin treatment unit by identical flow velocity by exporting second peristaltic pump that is connected with MIEX resin regeneration unit.
Described quartz sand filtration unit adopts water backwashing, and backwashing water adopts undressed underground water, promotes by backwash pump and enters the quartz sand filtration unit by the back flushing water distributing pipe by the quartz sand filtration unit bottom.
Beneficial effect:
(1) The present invention be directed to the problem that China has the nitrate in groundwater content overproof now, higher in conjunction with the underground water ions content, soil ulmin type organic proportion is bigger, the water quality characteristics that suspension content is low, take into full account MIEX (magnetic ionexchange, MIEX) basic form of resin application and characteristics and water technology commonly used at present, it is efficient to be formed for nitrate in groundwater, treatment unit and treatment process that safety is removed, strengthen the removal effect of nitrate in groundwater and other pollution substance, improve the effluent quality of underground water water factory, ensure the security that water factory supplies water.
(2) this invention has solved that the efficient that exists in the existing ion exchange technique at Processes of Nitrate Removal from Ground Water is not high, resin stain is serious, and the effluent quality problem of unstable; This device has coupling preferably, can be more conveniently be connected use with the facility of existing underground water water factory; Device adopts the MIEX resin with greater efficiency, can effectively remove organism, sulfate radical and other negatively charged ion in the water when guaranteeing the nitrate removal effect, improves effluent quality; On the MIEX processing unit, set up quartz sand filtration, removably descend a small amount of suspended substance that exists in the water to ensure that effectively the suspended substance in the water outlet meets the requirements on the one hand, but the resin particle that the while effectively catching is overflowed by the MIEX processing unit, the rate of loss of reduction resin increases its service efficiency.
(3) the present invention is directed to the pollution level of phreatic water quality characteristics and nitrate, MIEX plastic resin treatment technology and quartz sand filtration organic assembling are got up, forming with the MIEX plastic resin treatment is the nitrate removal associated plant of core.MIEX plastic resin treatment unit adopts upward flow filtration, and resin is in fluidized state in operational process, and the usage quantity of resin, the size of this part and section form are determined according to handling the water yield and water quality condition; MIEX resin regeneration unit is provided with separately, need regenerating resin to be transferred in the regenerating unit resin fluidized-bed bottom by peristaltic pump by certain flow, regeneration back resin is replenished by identical flow velocity by resin bed top, thereby guarantee that the amount of resin in the resin bed remains on a constant level, and device operation continuously; The quartz sand filtration unit, and resin boundary surface sets up supporting layer and quartz sand layer separately at interval more than the 10cm on it during the operation of quartz sand filtration unit bottom and plastic resin treatment unit; Adopt upward flow filtration, guarantee during operation that quartz sand does not expand, thus residual MIEX resin, suspended substance in can effectively catching water, thus reduce the turnover rate of resin, guarantee that effluent quality meets the demands.MIEX plastic resin treatment unit, the water inlet of quartz sand filtration unit bottom are adopted the water distribution orifice plate, and two-layer 100 orders, 120 purpose filter clothes are set respectively; Filtering unit effluent adopting perforated pipe collection is got, and reserves the mouth that adds of sterilizing agent on the rising pipe, is convenient to follow-up sterilization process; The back flushing of filtering unit adopts water to dash, and backwashing water adopts undressed underground water, promotes by backwash pump, utilizes the perforated pipe water distribution.In addition, before device import intake pump, set up dosing mouth and be used for tackling underground water temporary hardness problem of higher and other special pollutent situation that may exist.
Description of drawings
Fig. 1 is the structural representation of equipment therefor of the present invention.
Wherein, 1 is the quartz sand filtration unit, and 2 is MIEX plastic resin treatment unit, and 3 is MIEX resin regeneration unit, 4 is rising pipe, and 5 for the back flushing water inlet pipe, and 6 is intake pump, and 7 add mouth for sterilizing agent, 8 is dosing mouth, and 9 is first peristaltic pump, and 10 is second peristaltic pump, and 11 is supporting layer.
Fig. 2 is water distribution orifice plate of the present invention and water inlet distributing hole plate structure synoptic diagram.Wherein, 12 are the water inlet distributing hole.
Fig. 3 is a rising pipe structural representation of the present invention.Wherein, 13 is posticum.
Fig. 4 handles the variation diagram of nitrate content in the water of front and back for apparatus of the present invention.
Embodiment
As shown in Figure 1, a kind of treatment unit that is used to remove nitrate in groundwater, mainly by rising pipe 4, quartz sand filtration unit 1, back flushing water inlet pipe 5, MIEX plastic resin treatment unit 2, water-in, second peristaltic pump 10, first peristaltic pump 9, MIEX resin regeneration unit 3 is formed, be provided with rising pipe 4 at the top of treatment unit, have quartz sand filtration unit 1 at rising pipe 4,1 bottom, quartz sand filtration unit is provided with the water distribution orifice plate, water distribution orifice plate surface coverage has the drainage filter cloth, have back flushing water inlet pipe 5 in the quartz sand filtration unit, have MIEX plastic resin treatment unit 2 at back flushing water inlet pipe 5, bottom at treatment unit is provided with water-in, water-in links to each other with intake pump 6, above water-in, be provided with into water water distribution orifice plate, as shown in Figure 2, be evenly distributed with into water distributing hole 12 on the water inlet water distribution orifice plate, surface coverage at water inlet water distribution orifice plate has into water filter cloth, water inlet filter cloth density is less than the drainage filter cloth, if what one water inlet filter cloth used is 100 purposes, then the drainage filter cloth can use 120 purposes.The regenerating resin outlet for the treatment of of MIEX plastic resin treatment unit 2 is connected with 3 imports of MIEX resin regeneration unit by first peristaltic pump 9, and the outlet of MIEX resin regeneration unit 3 is connected with the regenerating resin import of MIEX plastic resin treatment unit 2 by second peristaltic pump 10.
Described quartz sand filtration unit 1 is provided with quartz sand filtration layer and supporting layer 11 from top to bottom, and quartz sand adopts grating quartz sand, thickness of filter bed＞40cm; Being provided with of supporting layer should guarantee that highly quartz sand does not leak down.。
Distance＞10cm between resin boundary surface when described quartz sand filtration unit bottom and the operation of MIEX plastic resin treatment unit.
As shown in Figure 3, described rising pipe is a perforated pipe, evenly is furnished with posticum 13 in the left and right sides of rising pipe, and the diameter of posticum can be arranged on 1～2cm, is provided with sterilizing agent and adds mouth on rising pipe, is provided with dosing mouth before the described water-in.
Described back flushing water inlet pipe is a perforated pipe, and position of opening is located at directly over the backwash tube.
Use the described treatment unit that is used for removing nitrate in groundwater to remove the method for water nitrate, adopting the upward flow operation scheme to enter MIEX plastic resin treatment unit after the water-in of pending water bottom treatment unit tentatively filters through water inlet water distribution orifice plate and water inlet filter cloth handles, by entering the quartz sand filtration unit after process water distribution orifice plate of the water after the MIEX plastic resin treatment and the filtration of drainage filter cloth, behind chlorination, enter clean water basin or be delivered to the user by the rising pipe collection through secondary pumping station through the water behind the quartz sand filtration;
Passing through for the treatment of in the MIEX plastic resin treatment unit that regenerating resin continues treats that with MIEX plastic resin treatment unit first peristaltic pump that the regenerating resin outlet is connected is transferred in the MIEX resin regeneration unit by design discharge, and the resin behind MIEX plastic resin treatment regeneration unit replenishes in the MIEX plastic resin treatment unit by identical flow velocity by exporting second peristaltic pump that is connected with MIEX resin regeneration unit.Resin regeneration process of the present invention and conventional resin regeneration process are similar, the regenerating resin of being carried by peristaltic pump for the treatment of is delivered to earlier in the hold-up vessel, after waiting to collect certain volume, be transferred to regenerating tank regeneration, regeneration back resin is carried go back to the plastic resin treatment unit by another peristaltic pump.Regeneration of resin and operation just can move continuously like this.
Described quartz sand filtration unit adopts water backwashing, and backwashing water adopts undressed underground water, promotes by backwash pump and enters the quartz sand filtration unit by the back flushing water distributing pipe by the quartz sand filtration unit bottom.
Below be further detailed by specific examples.
Research trial is former water with the underground water that the somewhere is subjected to azotate pollution, with MIEX plastic resin treatment unit of the present invention and quartz sand filtration associated plant is research object, by device to the removal effect demo plant of nitrate in groundwater validity to nitrate removal.
(1) experiment is carried out in that somewhere pipe well intake strucure is other, experimental installation adopt as shown in Figure 1 small testing device.Device influent quality situation is as shown in table 1.
Table 1 experimental installation influent quality
The resin travelling speed of peristaltic pump is determined according to water quality, water yield condition.
(2) operating performance of treatment unit
The treatment unit that relates in the invention is stable to the removal effect stability and high efficiency of nitrate at experimental session, specifically sees Fig. 4, and the clearance of nitrate is stabilized in more than 65%.
Claims (7)
1. treatment unit that is used to remove nitrate in groundwater, it is characterized in that, mainly by rising pipe, the quartz sand filtration unit, the back flushing water inlet pipe, MIEX plastic resin treatment unit, water-in, first peristaltic pump, second peristaltic pump, MIEX resin regeneration unit is formed, top at treatment unit is provided with rising pipe, have the quartz sand filtration unit at rising pipe, the quartz sand filtration unit bottom is provided with the water distribution orifice plate, water distribution orifice plate surface coverage has the drainage filter cloth, have the back flushing water inlet pipe in the quartz sand filtration unit, have MIEX plastic resin treatment unit at the back flushing water inlet pipe, bottom at treatment unit is provided with water-in, above water-in, be provided with into water water distribution orifice plate, surface coverage at water inlet water distribution orifice plate has into water filter cloth, water inlet filter cloth density is less than the drainage filter cloth, the MIEX plastic resin treatment is unitary treats that the regenerating resin outlet is connected with MIEX resin regeneration unit inlet by first peristaltic pump, and the unitary outlet of MIEX resin regeneration is connected with the unitary regenerating resin import of MIEX plastic resin treatment by second peristaltic pump.
2. the treatment unit that is used to remove nitrate in groundwater as claimed in claim 1 is characterized in that, described quartz sand filtration unit is provided with quartz sand filtration layer and supporting layer from top to bottom, and quartz sand adopts grating quartz sand, highly＞and 40cm.
3. the treatment unit that is used to remove nitrate in groundwater as claimed in claim 1 is characterized in that, the distance＞10cm between the resin boundary surface when described quartz sand filtration unit bottom and the operation of MIEX plastic resin treatment unit.
4. the treatment unit that is used to remove nitrate in groundwater as claimed in claim 1 is characterized in that described rising pipe is a perforated pipe, is provided with sterilizing agent and adds mouth on rising pipe, is provided with dosing mouth before the described water-in.
5. the treatment unit that is used to remove nitrate in groundwater as claimed in claim 1 is characterized in that, described back flushing water inlet pipe is a perforated pipe, and position of opening is located at directly over the backwash tube.
6. use the described treatment unit that is used for removing nitrate in groundwater of claim 1 to remove the method for water nitrate, it is characterized in that, adopting the upward flow operation scheme to enter MIEX plastic resin treatment unit after the water-in of pending water bottom treatment unit tentatively filters through water inlet water distribution orifice plate and water inlet filter cloth handles, by entering the quartz sand filtration unit after process water distribution orifice plate of the water after the MIEX plastic resin treatment and the filtration of drainage filter cloth, the water behind the process quartz sand filtration enters clean water basin or directly is delivered to the user by repumping house after being collected by rising pipe;
In the MIEX plastic resin treatment unit treat that regenerating resin continues pass through treat that with MIEX plastic resin treatment unit first peristaltic pump that the regenerating resin outlet is connected is transferred in the MIEX resin regeneration unit by design discharge, the resin behind MIEX plastic resin treatment regeneration unit is provided by import by regenerating resin in the MIEX plastic resin treatment unit by identical flow velocity by exporting second peristaltic pump that is connected with MIEX resin regeneration unit.
7. the treatment unit that use as claimed in claim 6 is used for removing nitrate in groundwater is removed the method for water nitrate, it is characterized in that, described quartz sand filtration unit adopts water backwashing, backwashing water adopts undressed underground water, promotes by backwash pump and enters the quartz sand filtration unit by the back flushing water distributing pipe by the quartz sand filtration unit bottom.
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| CN2010105227899A CN101973657B (en) | 2010-10-27 | 2010-10-27 | Processing device and processing method for removing nitrate from ground water |
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| CN2010105227899A CN101973657B (en) | 2010-10-27 | 2010-10-27 | Processing device and processing method for removing nitrate from ground water |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645511A (en) * | 2012-05-18 | 2012-08-22 | 河海大学 | Device for detecting adsorption capacity of powdered active carbon |
| CN103880215A (en) * | 2014-03-24 | 2014-06-25 | 河海大学 | Integral water purifying device for removing hardness of underground water |
| CN104628189A (en) * | 2015-02-13 | 2015-05-20 | 河海大学 | Combined water treatment method for synchronously removing sulfate, hardness and total dissolved solids |
| CN104860488A (en) * | 2015-06-09 | 2015-08-26 | 桂林理工大学 | Method for self-removal of nitrate in underground water by virtue of rice wine in rural families |
| CN105217724A (en) * | 2015-09-15 | 2016-01-06 | 江苏永冠给排水设备有限公司 | A kind of technique and equipment removing Nitrate In Drinking Water |
| CN108706788A (en) * | 2018-08-17 | 2018-10-26 | 谢绍舜 | Denitrogenate device and method in gravity rectifier type ion-exchange sewage disposal end |
| CN109133252A (en) * | 2018-10-12 | 2019-01-04 | 北京师范大学 | A kind of nitrate in groundwater selective removal technique and equipment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645511A (en) * | 2012-05-18 | 2012-08-22 | 河海大学 | Device for detecting adsorption capacity of powdered active carbon |
| CN102645511B (en) * | 2012-05-18 | 2015-02-04 | 河海大学 | Device for detecting adsorption capacity of powdered active carbon |
| CN103880215A (en) * | 2014-03-24 | 2014-06-25 | 河海大学 | Integral water purifying device for removing hardness of underground water |
| CN103880215B (en) * | 2014-03-24 | 2015-10-07 | 河海大学 | A kind of integral water purifying device removed for ground water hardness |
| CN104628189A (en) * | 2015-02-13 | 2015-05-20 | 河海大学 | Combined water treatment method for synchronously removing sulfate, hardness and total dissolved solids |
| CN104628189B (en) * | 2015-02-13 | 2016-08-31 | 河海大学 | The Combined water processing method of removing sulfate, hardness and total dissolved solidss is gone in a kind of synchronization |
| CN104860488A (en) * | 2015-06-09 | 2015-08-26 | 桂林理工大学 | Method for self-removal of nitrate in underground water by virtue of rice wine in rural families |
| CN105217724A (en) * | 2015-09-15 | 2016-01-06 | 江苏永冠给排水设备有限公司 | A kind of technique and equipment removing Nitrate In Drinking Water |
| CN105217724B (en) * | 2015-09-15 | 2018-04-03 | 江苏永冠给排水设备有限公司 | A kind of technique and equipment for removing Nitrate In Drinking Water |
| CN108706788A (en) * | 2018-08-17 | 2018-10-26 | 谢绍舜 | Denitrogenate device and method in gravity rectifier type ion-exchange sewage disposal end |
| CN109133252A (en) * | 2018-10-12 | 2019-01-04 | 北京师范大学 | A kind of nitrate in groundwater selective removal technique and equipment |
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| CN101973657B (en) | 2012-07-25 |
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Application publication date: 20110216 Assignee: Jiangsu Heqing Haiyan Environment Co.,Ltd. Assignor: HOHAI University Contract record no.: 2019320000002 Denomination of invention: Processing device and processing method for removing nitrate from ground water Granted publication date: 20120725 License type: Exclusive License Record date: 20190108 |