CN105502737A - Treatment system and treatment method of wastewater regenerated produced by SCR (Selective Catalytic Reduction) denitration catalyst regeneration - Google Patents
Treatment system and treatment method of wastewater regenerated produced by SCR (Selective Catalytic Reduction) denitration catalyst regeneration Download PDFInfo
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- CN105502737A CN105502737A CN201510901036.1A CN201510901036A CN105502737A CN 105502737 A CN105502737 A CN 105502737A CN 201510901036 A CN201510901036 A CN 201510901036A CN 105502737 A CN105502737 A CN 105502737A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention provides a treatment system of wastewater regenerated produced by an SCR (Selective Catalytic Reduction) denitration catalyst regeneration. The system comprises a washing wastewater collecting tank 1 for holding washing wastewater, a pickling wastewater collecting tank 2 for holding pickling wastewater, an alkali washing wastewater collecting tank 3 for holding alkali washing wastewater, an adjsutingadjusting tank 4, a generalized reaction tank 5, a middle water tank 6, a sedimentation tank 7, a clean water tank 8, a sludge concentration tank 9, a sludge concentration system 10 and a dosing system 11. The invention also provides a method for treating the wastewater regenerated produced by the SCR denitration catalyst regeneration by utilizing the treatment system. The treatment system provided by the invention fully utilizes the an incoming water characteristic design technology, is simple in structure, low in investment operation cost, high in automation degree and good in treatment effect, and can meet the treatment requirement of the wastewater regenerated produced by the SCR catalyst regeneration.
Description
Technical field
The invention belongs to industrial waste water treatment, relate to treatment system and the treatment process of the waste water that the regeneration of a kind of SCR denitration produces particularly.
Background technology
Flue gas SCR technology (SelectiveCatalystReduction is called for short SCR).Along with Economic development, thermal power generation in national product still in occupation of very important status, the oxynitride of power plant emission has become one of atmospheric environment principal pollutant, therefore, remove oxynitride SCR denitration at home power plant be widely applied.SCR denitration regeneration techniques can extending catalyst work-ing life, reduces running cost, can also reduce catalyst solid waste pollution on the environment pressure and the useless processing cost of danger simultaneously, will become the only way of SCR denitration industry development.
Inevitably produce a large amount of waste water in SCR denitration regenerative process, it has the high feature of the heavy metal concentration such as arsenic and vanadium, must process such waste water.
The waste water produced in SCR denitration regenerative process mainly comprises the Cleaning Wastewater from cleaning section, the pickling waste waters from acid cleaning process section and the three strands of waste water such as alkali-wash waste water from alkali washing process section.Wherein, the principal feature of Cleaning Wastewater is containing suspended substance, and presents acidity; The principal feature of pickling waste waters presents acidity, and containing heavy metal ion such as arsenic, tungsten, vanadium; The principal feature of alkali-wash waste water presents alkalescence, and containing the heavy metal ion such as arsenic, vanadium.SCR denitration regenerative wastewater has to pass through suitable process, reaches emission standard and can carry out discharging or recycling.
Summary of the invention
The object of this invention is to provide the treatment system of the waste water that the regeneration of a kind of SCR (SCR) denitrating catalyst produces, it is characterized in that, described system comprise Cleaning Wastewater collecting tank 1 for receiving Cleaning Wastewater, for receive pickling waste waters pickling waste waters collecting tank 2, for receiving the alkali-wash waste water collecting tank 3 of alkali-wash waste water, equalizing tank 4, combined reaction pond 5, intermediate pool 6, settling tank 7, clean water basin 8, sludge thickener 9, sludge dewatering system 10 and medicine system 11;
Wherein, described Cleaning Wastewater collecting tank 1, pickling waste waters collecting tank 2 are communicated with equalizing tank 4 by controllable pipeline respectively with alkali-wash waste water collecting tank 3;
Described equalizing tank 4, combined reaction pond 5, intermediate pool 6, settling tank 7 and clean water basin 8 are successively by controllable pipeline communication;
Described settling tank 7 is communicated with sludge thickener 9 by controllable pipeline;
Described sludge thickener 9 is communicated with sludge dewatering system 10 by controllable pipeline;
Described sludge dewatering system 10 is communicated with equalizing tank 4 by controllable pipeline;
Described clean water basin 8 are provided with discharge of wastewater mouth;
Described medicine system 11 is communicated with combined reaction pond 5, settling tank 7 respectively by controllable pipeline;
Preferably, described Cleaning Wastewater collecting tank 1, pickling waste waters collecting tank 2, alkali-wash waste water collecting tank 3 are furnished with the fluid level control device of interlocking with the lift pump exported separately respectively, and each lifting pump outlet described is provided with under meter;
Preferably, described equalizing tank 4 arranges whipping appts, and is provided with the fluid level control device that the lift pump that exports with equalizing tank 4 interlocks, and the lifting pump outlet that described equalizing tank 4 exports is provided with under meter;
Preferably, the discharge outlet be communicated with the entrance lift pump of described intermediate pool 6 is provided with bottom described combined reaction pond 5;
Preferably, described intermediate pool 6 is provided with the fluid level control device that the lift pump that exports with intermediate pool 6 is interlocked;
Preferably, the outlet of described clean water basin 8 arranges lift pump, and the clear water after process is undertaken discharging or reuse by the lift pump that described clean water basin 8 export;
Preferably, the controllable pipeline by having sludge pump bottom described sludge thickener 9 is communicated with sludge dewatering system 10, supernatant liquor by Cemented filling to equalizing tank 4; More preferably, equalizing tank 4 and sludge dewatering system 10, between be provided with collecting tank, described collecting tank is communicated with sludge thickener 9 with sludge dewatering system 10, equalizing tank 4 respectively by controllable pipeline, and the filtrate of sludge dewatering system 10 and the supernatant liquor of sludge thickener 9 pass through controllable Cemented filling to equalizing tank 4;
Preferably, described collecting tank is provided with the Liquid level that the lift pump that exports with described collecting tank interlocks and fills;
Preferably, described medicine system 11 comprises hydrochloric acid chemicals dosing plant, sodium hydroxide chemicals dosing plant, calcium chloride chemicals dosing plant, coagulant drug-adding device, heavy metal chelating agent chemicals dosing plant, polyacrylamide (PAM) chemicals dosing plant.
According in one embodiment of the invention, arrange ORP/pH on-line monitoring device, whipping appts, hydrochloric acid chemical feeding points, sodium hydroxide chemical feeding points, calcium chloride chemical feeding points, coagulating agent chemical feeding points, heavy metal chelating agent chemical feeding points in described combined reaction pond 5, each chemical feeding points is communicated with medicine system 11 respectively by controllable pipeline.
According in one embodiment of the invention, described settling tank 7 is provided with Adding medicine control groove, water distribution inlet flume and settling region, described Adding medicine control groove arranges polyacrylamide (PAM) chemical feeding points, described polyacrylamide (PAM) chemical feeding points is communicated with polyacrylamide (PAM) chemicals dosing plant of medicine system 11 by controllable pipeline, and the settling region that described water distribution inlet flume is adjacent is communicated with.
According in one embodiment of the invention, described settling tank 7 is inclined-plate clarifying basin, and the outlet of described settling tank 7 is communicated with clean water basin 8 by pipeline, and the bottom of described settling tank 7 is communicated with sludge thickener 9 by controllable pipeline.
Present invention also offers the treatment process of the waste water that the regeneration of a kind of SCR denitration produces, described method utilizes the treatment system according to any one of Claims 1 to 4 to realize, and described method comprises:
1) waste water that SCR denitration regeneration produces is delivered to Cleaning Wastewater collecting tank 1, pickling waste waters collecting tank 2 and alkali-wash waste water collecting tank 3 respectively according to process section;
2) by step 1) described in Cleaning Wastewater collecting tank 1, pickling waste waters collecting tank 2 and alkali-wash waste water collecting tank 3 in waste water with the volume ratio blending transportation of 1:1:1 to equalizing tank 4, fully obtain composite waste after mixing;
3) by above-mentioned steps 2) composite waste that obtains is delivered to combined reaction pond 5, and controlled the add-on of hydrochloric acid, sodium hydroxide and calcium chloride by medicine system 11, make the pH value of the waste water in described combined reaction pond 5 be 8.5; Add coagulating agent, heavy metal chelating agent respectively by medicine system 11, react more than 30 minutes, be preferably 45 ~ 60 minutes, reacted waste water is delivered to intermediate pool 6; Preferably, sodium hydroxide and calcium chloride add simultaneously;
4) waste water in intermediate pool 6 is delivered to settling tank 7 and carries out precipitate and separate, obtain clear liquor and throw out;
5) by above-mentioned steps 4) clear liquor that obtains is delivered to clean water basin 8, discharges by lift pump;
6) by above-mentioned steps 4) throw out that obtains is delivered to sludge thickener 9 and carries out sludge condensation, obtains supernatant liquor and thickened sludge;
7) by above-mentioned steps 6) thickened sludge that obtains is delivered to sludge dewatering system 10 and carries out sludge dewatering, obtains filtrate and mud cake;
8) by above-mentioned steps 6) supernatant liquor and 7 that produces) filtrate that produces is delivered to equalizing tank 4.
According in one embodiment of the invention, step 3) in, described coagulating agent be selected from poly-ferric chloride, iron(ic) chloride, aluminum chloride, polymerize aluminum chloride one or more, be preferably iron(ic) chloride; Wherein, in the add-on of iron(ic) chloride and the water outlet of equalizing tank 4, the mass ratio of arsenic is greater than 7.5:1, and the mass ratio being preferably iron(ic) chloride and arsenic is 9 ~ 12:1; More preferably, described coagulating agent is aluminum chloride; Further preferably the mass ratio of aluminum chloride and arsenic is 15 ~ 30:1.
According in one embodiment of the invention, step 3) in, in described combined reaction pond 5, the add-on of heavy metal chelating agent is for being greater than 600mg/L, is preferably 800 ~ 2000mg/L.
According in one embodiment of the invention, step 4) described in settling tank 7 be provided with Adding medicine control groove and water distribution inlet flume, described Adding medicine control groove arranges polyacrylamide (PAM) chemical feeding points, and the described polyacrylamide (PAM) added by polyacrylamide (PAM) chemical feeding points is greater than 0.5mg/L; Be preferably 1 ~ 3mg/L.
According in one embodiment of the invention, step 4) described in time of precipitate and separate for being greater than 3 hours, be preferably 4 ~ 6 hours.
According in one embodiment of the invention, collecting tank is provided with between equalizing tank 4 and sludge thickener 9, step 8) comprise further first by step 6) supernatant liquor that produces and step 7) filtrate that produces is delivered to collecting tank and obtains mixing Ethylene recov, then by pipeline, described mixing Ethylene recov is delivered to equalizing tank 4 by collecting tank.
Feature of the present invention is water quality characteristic for Cleaning Wastewater, pickling waste waters, alkali-wash waste water and heavy metal ion existence, first three strands of waste water are mixed, the effect regulating mutually pH can be reached, be conducive to the carrying out of subsequent reactions, the heavy metal ion such as arsenic, vanadium, tungsten be can efficiently remove in same combined reaction pond simultaneously, qualified discharge or reuse realized.
The present invention makes full use of water feature design technology, and structure is simple, and investment running cost is low, and level of automation is high, and treatment effect is good, can meet the processing requirements of such SCR catalyst regenerative wastewater.
Accompanying drawing explanation
Fig. 1 is the treatment process schematic diagram of the waste water that the regeneration of a kind of SCR denitration produces.Main device shown in figure comprises Cleaning Wastewater collecting tank 1, pickling waste waters collecting tank 2, alkali-wash waste water collecting tank 3, equalizing tank 4, combined reaction pond 5, intermediate pool 6, settling tank 7, clean water basin 8, sludge thickener 9, sludge condensation system 10, medicine system 11.
Embodiment
Further illustrate the present invention below by specific embodiment, but should be understood to, these embodiments are only used for the use specifically described more in detail, and should not be construed as limiting the present invention in any form.
embodiment 1
As shown in Figure 1, the SCR denitration Waste Water Treatment of the present embodiment mainly comprises Cleaning Wastewater collecting tank 1, pickling waste waters collecting tank 2, alkali-wash waste water collecting tank 3, equalizing tank 4, combined reaction pond 5, intermediate pool 6, settling tank 7, clean water basin 8, sludge thickener 9, sludge condensation system 10, medicine system 11.
Waste water from cleaning section contains certain suspended substance, enters Cleaning Wastewater collecting tank 1, have very strong acidity, pH < 3, containing heavy metal ion such as a small amount of arsenic, vanadium after leaving standstill; Waste water from acid cleaning process section enters pickling waste waters collecting tank 2 equally after leaving standstill, and has strongly-acid, pH < 2, and containing the heavy metal ion such as arsenic, vanadium; Waste water from alkali washing process section enters alkali-wash waste water collecting tank 3 after leaving standstill, and have very strong alkalescence, pH is greater than 12, and containing a large amount of arsenic and vanadium, arsenic content is about 400mg/L, and content of vanadium is about 50mg/L.
The waste water of three collecting tanks controls suitable ratio (as 1:1:1) according to the water yield and water quality characteristic and delivers to equalizing tank 4 by lift pump.Equalizing tank 4 is provided with whipping appts, three strands of waste water can be made fully to be mixed, and play the effect of stable subsequent cell amount of inlet water and water quality, wastewater pH < 7 in equalizing tank after mixing, arsenic content < 100mg/L, content of vanadium < 30mg/L.
Equalizing tank 4 water outlet enters combined reaction pond 5, according to ORP/pH on-line monitoring device detected result, controlled the chemical feeding quantity of the hydrochloric acid chemicals dosing plant of medicine system 11, sodium hydroxide chemicals dosing plant and calcium chloride chemicals dosing plant by interlock control system, make pH maintain 8.5.Wherein sodium hydroxide chemicals dosing plant and calcium chloride chemicals dosing plant are interlocked further, add simultaneously.
According to the arsenic cubage of equalizing tank 4 water outlet, the chemical feeding quantity of iron(ic) chloride is 870mg/L, adds the heavy metal chelating agent that concentration is 1000mg/L simultaneously, under in equalizing tank 4, whipping appts stirs, fully mixes with water.
Hydraulic detention time in combined reaction pond 5 is 1h, the heavy metal ion in waste water with add medicament and carry out reaction and generate throw out.
Combined reaction pond 5 water outlet enters the Adding medicine control groove of settling tank 7 through intermediate pool 6, the PAM that content is 2mg/L is added at Adding medicine control groove, enter into water control flume after mixing completely, finally enter inclined-plate clarifying basin, in inclined-plate clarifying basin, hydraulic detention time is 5h, and the throw out generated in waste water and suspended substance precipitate to be removed.
Through above-mentioned reaction, the arsenic content of settling tank 7 water outlet can be less than 0.5mg/L, and content of vanadium is less than 0.5mg/L, meets emission request, enters filtered water tank, discharges by lift pump.
Settling tank 7 bottom settlings thing concentrates from flowing to sludge thickener 8, and the concentrated solution obtained is pumped to sludge dewatering system 8 by sludge condensation and carries out processed.The unit delivering to qualification outside the mud cake that sludge dewatering system 8 produces processes, and the supernatant liquor that the filtrate of collection and sludge thickener 8 obtain drains into mechanism's (not shown) of catchmenting, and sends equalizing tank 4 back to by lift pump.
Although present invention has been description to a certain degree, significantly, under the condition not departing from the spirit and scope of the present invention, can carry out the suitable change of each condition.Be appreciated that and the invention is not restricted to described embodiment, and be attributed to the scope of claim, it comprises the equivalent replacement of described each factor.
Claims (10)
1. the treatment system of the waste water of SCR (SCR) denitrating catalyst regeneration generation, it is characterized in that, described system comprises the Cleaning Wastewater collecting tank (1) for receiving Cleaning Wastewater, for receiving the pickling waste waters collecting tank (2) of pickling waste waters, for receiving the alkali-wash waste water collecting tank (3) of alkali-wash waste water, equalizing tank (4), combined reaction pond (5), intermediate pool (6), settling tank (7), clean water basin (8), sludge thickener (9), sludge dewatering system (10) and medicine system (11),
Wherein, described Cleaning Wastewater collecting tank (1), pickling waste waters collecting tank (2) are communicated with equalizing tank (4) by controllable pipeline respectively with alkali-wash waste water collecting tank (3);
Described equalizing tank (4), combined reaction pond (5), intermediate pool (6), settling tank (7) and clean water basin (8) are successively by controllable pipeline communication;
Described settling tank (7) is communicated with sludge thickener (9) by controllable pipeline;
Described sludge thickener (9) is communicated with sludge dewatering system (10) by controllable pipeline;
Described sludge dewatering system (10) is communicated with equalizing tank (4) by controllable pipeline;
Described clean water basin (8) are provided with discharge of wastewater mouth;
Described medicine system (11) is communicated with combined reaction pond (5), settling tank (7) respectively by controllable pipeline;
Preferably, described Cleaning Wastewater collecting tank (1), pickling waste waters collecting tank (2), alkali-wash waste water collecting tank (3) are furnished with the fluid level control device of interlocking with the lift pump exported separately respectively, and each lifting pump outlet described is provided with under meter;
Preferably, described equalizing tank (4) arranges whipping appts, and is provided with the fluid level control device that the lift pump that exports with equalizing tank (4) interlocks, and the lifting pump outlet that described equalizing tank (4) exports is provided with under meter;
Preferably, described combined reaction pond (5) bottom is provided with the discharge outlet be communicated with the entrance lift pump of described intermediate pool (6);
Preferably, described intermediate pool (6) is provided with the fluid level control device that the lift pump that exports with intermediate pool (6) is interlocked;
Preferably, the outlet of described clean water basin (8) arranges lift pump, and the clear water after process is undertaken discharging or reuse by the lift pump that described clean water basin (8) export;
Preferably, described sludge thickener (9) bottom is communicated with sludge dewatering system (10) by the controllable pipeline with sludge pump; More preferably, between equalizing tank (4) and sludge dewatering system (10), be provided with collecting tank, described collecting tank is communicated with sludge thickener (9) with sludge dewatering system (10), equalizing tank 4 respectively by controllable pipeline;
Preferably, described collecting tank is provided with the Liquid level that the lift pump that exports with described collecting tank interlocks and fills;
Preferably, described medicine system (11) comprises hydrochloric acid chemicals dosing plant, sodium hydroxide chemicals dosing plant, calcium chloride chemicals dosing plant, coagulant drug-adding device, heavy metal chelating agent chemicals dosing plant, polyacrylamide (PAM) chemicals dosing plant.
2. the system as claimed in claim 1, it is characterized in that, arrange redox potential/pH (ORP/pH) on-line monitoring device, whipping appts, hydrochloric acid chemical feeding points, sodium hydroxide chemical feeding points, calcium chloride chemical feeding points, coagulating agent chemical feeding points, heavy metal chelating agent chemical feeding points in described combined reaction pond (5), each chemical feeding points is communicated with medicine system (11) respectively by controllable pipeline.
3. system as claimed in claim 1 or 2, it is characterized in that, described settling tank (7) is provided with Adding medicine control groove and water distribution inlet flume, described Adding medicine control groove arranges polyacrylamide (PAM) chemical feeding points, described polyacrylamide (PAM) chemical feeding points is communicated with polyacrylamide (PAM) chemicals dosing plant of medicine system (11) by controllable pipeline, and described water distribution inlet flume is communicated with the settling region of settling tank (7).
4. the system according to any one of claims 1 to 3, it is characterized in that, described settling tank (7) is inclined-plate clarifying basin, the outlet of described settling tank (7) is communicated with clean water basin (8) by controllable pipeline, and the bottom of described settling tank (7) is communicated with sludge thickener (9) by controllable pipeline.
5. a treatment process for the waste water of SCR (SCR) denitrating catalyst regeneration generation, is characterized in that, described method utilizes system according to any one of Claims 1 to 4 to realize, and described method comprises:
1) waste water SCR denitration regeneration produced is according to process section transport cleaning wastewater collection pond (1), pickling waste waters collecting tank (2) and alkali-wash waste water collecting tank (3) respectively;
2) by step 1) described in Cleaning Wastewater collecting tank (1), pickling waste waters collecting tank (2) and alkali-wash waste water collecting tank (3) in waste water with the volume ratio blending transportation of 1:1:1 to equalizing tank (4), fully obtain composite waste after mixing;
3) by above-mentioned steps 2) composite waste that obtains is delivered to combined reaction pond (5), controlled the add-on of hydrochloric acid, sodium hydroxide and calcium chloride by medicine system (11), the pH value making the waste water in described combined reaction pond (5) is 8.5; Add coagulating agent, heavy metal chelating agent respectively by medicine system (11), react more than 30 minutes, be preferably 45 ~ 60 minutes, reacted waste water is delivered to intermediate pool (6); Preferably, sodium hydroxide and calcium chloride add simultaneously;
4) water outlet of intermediate pool (6) is delivered to settling tank (7) and carries out precipitate and separate, obtain clear liquor and throw out;
5) by above-mentioned steps 4) clear liquor that obtains is delivered to clean water basin (8), discharged by lift pump;
6) by above-mentioned steps 4) throw out that obtains is delivered to sludge thickener (9) and carries out sludge condensation, obtains supernatant liquor and thickened sludge;
7) by above-mentioned steps 6) thickened sludge that obtains is delivered to sludge dewatering system (10) and carries out sludge dewatering, obtains filtrate and mud cake;
8) by above-mentioned steps 6) supernatant liquor and 7 that produces) filtrate that produces is delivered to equalizing tank (4).
6. method as claimed in claim 5, is characterized in that, step 3) in, described coagulating agent be selected from poly-ferric chloride, iron(ic) chloride, aluminum chloride, polymerize aluminum chloride one or more, be preferably iron(ic) chloride; Wherein, in the water outlet of the quality of the iron(ic) chloride added and equalizing tank (4), the mass ratio of arsenic is greater than 7.5:1, and the mass ratio being preferably iron(ic) chloride and arsenic is 9 ~ 12:1; More preferably, described coagulating agent is aluminum chloride; Further preferably, the quality of the aluminum chloride added and the mass ratio of arsenic are 15 ~ 30:1.
7. the method as described in claim 5 or 6, is characterized in that, step 3) in, in described combined reaction pond (5), the add-on of heavy metal chelating agent is for being greater than 600mg/L, is preferably 800 ~ 2000mg/L.
8. the method according to any one of claim 5 ~ 7, it is characterized in that, step 4) described in settling tank (7) be provided with Adding medicine control groove and water distribution inlet flume, described Adding medicine control groove arranges polyacrylamide (PAM) chemical feeding points, and the polyacrylamide (PAM) added by described polyacrylamide (PAM) chemical feeding points is greater than 0.5mg/L; Be preferably 1 ~ 3mg/L.
9. the method according to any one of claim 5 ~ 8, is characterized in that, step 4) described in time of precipitate and separate for being greater than 3 hours, be preferably 4 ~ 6 hours.
10. the method according to any one of claim 5 ~ 9, it is characterized in that, collecting tank is provided with between equalizing tank (4) and sludge thickener (9), step 8) comprise further first by step 6) supernatant liquor that produces and step 7) filtrate that produces is delivered to collecting tank and obtains mixing Ethylene recov, then by pipeline, described mixing Ethylene recov is delivered to equalizing tank (4) by collecting tank.
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| CN201510901036.1A CN105502737B (en) | 2015-12-09 | 2015-12-09 | A kind of processing system and processing method of the waste water that SCR denitration regeneration generates |
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| CN201510901036.1A CN105502737B (en) | 2015-12-09 | 2015-12-09 | A kind of processing system and processing method of the waste water that SCR denitration regeneration generates |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110078169A (en) * | 2019-06-10 | 2019-08-02 | 成渝钒钛科技有限公司 | A kind of vanadium extraction plant area zero emission method of wastewater |
| CN111977872A (en) * | 2020-08-26 | 2020-11-24 | 大唐环境产业集团股份有限公司 | System and method for treating high-dust high-vanadium wastewater regenerated by denitration catalyst and recycling reclaimed water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110078169A (en) * | 2019-06-10 | 2019-08-02 | 成渝钒钛科技有限公司 | A kind of vanadium extraction plant area zero emission method of wastewater |
| CN111977872A (en) * | 2020-08-26 | 2020-11-24 | 大唐环境产业集团股份有限公司 | System and method for treating high-dust high-vanadium wastewater regenerated by denitration catalyst and recycling reclaimed water |
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| CN105502737B (en) | 2019-04-05 |
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