CN108117192A - A kind of advanced treatment process of coking waste water - Google Patents

A kind of advanced treatment process of coking waste water Download PDF

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Publication number
CN108117192A
CN108117192A CN201711401703.5A CN201711401703A CN108117192A CN 108117192 A CN108117192 A CN 108117192A CN 201711401703 A CN201711401703 A CN 201711401703A CN 108117192 A CN108117192 A CN 108117192A
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coking
value
waste water
treatment process
advanced treatment
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CN201711401703.5A
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Chinese (zh)
Inventor
杜连喜
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Acre Coking and Refractory Engineering Consulting Corp MCC
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Acre Coking and Refractory Engineering Consulting Corp MCC
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Priority to CN201711401703.5A priority Critical patent/CN108117192A/en
Publication of CN108117192A publication Critical patent/CN108117192A/en
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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
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • C02F2101/10—Inorganic compounds
    • C02F2101/101—Sulfur compounds
    • 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
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C02F2101/18—Cyanides
    • 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
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil
    • 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
    • C02F2101/32—Hydrocarbons, e.g. oil
    • C02F2101/322—Volatile compounds, e.g. benzene
    • 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
    • C02F2101/32—Hydrocarbons, e.g. oil
    • C02F2101/327—Polyaromatic Hydrocarbons [PAH's]
    • 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
    • C02F2101/34—Organic compounds containing oxygen
    • C02F2101/345—Phenols
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • 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
    • 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
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • 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
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • 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
    • C02F2209/14—NH3-N
    • 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
    • C02F2209/16—Total nitrogen (tkN-N)
    • 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
    • C02F2209/18—PO4-P
    • 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
    • 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
    • C02F2305/026—Fenton's reagent

Abstract

The present invention relates to a kind of advanced treatment process of coking waste water, the coking wastewater after biochemical treatment enters pH value regulating reservoir, with concentrated sulfuric acid tune pH value to 3~4；It adjusts the coking wastewater after pH and introduces catalysis oxidation pond, add catalyst sulfuric acid ferrous iron and oxidant hydrogen peroxide；After catalysis oxidation at least 1h, mixed liquor enters precipitation separate tank or ceramic filter；PH value is adjusted to more than 7 by precipitation separate tank water outlet or ceramic filter water outlet with sodium hydroxide；The content of each pollutant such as COD and easy release cyanide in coking wastewater can be greatly lowered in the present invention, it is ensured that reach《Coking chemistry emission of industrial pollutants standard》14 Sewage Water Emissions limit index required by 2012 tables 2 of GB16171, and processing procedure continuous-stable, and system operation cost can be reduced.

Description

A kind of advanced treatment process of coking waste water
Technical field
The present invention relates to Technologies of Coke Plant Wastewater Treatment field more particularly to a kind of use Fenton catalytic oxidation to give up to coking The technique that water carries out advanced treating.
Background technology
A small amount of index has fluctuation in existing Fenton catalytic oxidation treatment technology, particularly easily discharges cyanide index, It is easily discharged cyanide index by water to be affected, easily discharging cyanide has some fluctuation, is difficult to reach《Coking chemistry work Industry pollutant emission standard》Standard required by GB16171-2012, in actual production, the index compliance rate is less than 30%；Separately Another not foot point of outer existing Fenton catalytic oxidation treatment technology is that sludge yield is big.
The content of the invention
The present invention provides a kind of advanced treatment process of coking waste water, COD and easily can be greatly lowered in coking wastewater Discharge the content of each pollutants such as cyanide, it is ensured that reach《Coking chemistry emission of industrial pollutants standard》GB16171-2012 14 Sewage Water Emissions limit index required by table 2, and processing procedure continuous-stable, and system operation cost can be reduced.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of advanced treatment process of coking waste water, includes the following steps：
Coking wastewater water quality after biochemical treatment is：CODcr≤180mg/L；Volatile phenol≤0.5mg/L；Easily release cyanogen Compound≤0.5mg/L；Oil≤5mg/L；Total nitrogen≤20mg/L；SS≤70mg/L；PH value 7~8；
Coking wastewater after biochemical treatment enters pH value regulating reservoir, with concentrated sulfuric acid tune pH value to 3~4；
It adjusts the coking wastewater after pH and introduces catalysis oxidation pond, add catalyst sulfuric acid ferrous iron and oxidant hydrogen peroxide；It urges After changing oxidation at least 1h, mixed liquor enters precipitation separate tank or ceramic filter；
PH value is adjusted to more than 7 by precipitation separate tank water outlet or ceramic filter water outlet with sodium hydroxide；
It is through treated effluent index：PH value 6~9；Suspended matter≤50mg/L；CODcr≤80mg/L；Ammonia nitrogen≤ 10mg/L；BOD5≤20mg/L；Total nitrogen≤20mg/L；Total phosphorus≤1.0mg/L；Petroleum-type≤2.5mg/L；Volatile phenol≤0.3mg/ L；Sulfide≤0.5mg/L；Sulfide≤0.5mg/L；Benzene≤0.1mg/L；Cyanide≤0.2mg/L；Polycyclic aromatic hydrocarbon≤ 0.05mg/L；The μ g/L of benzo a pyrenes≤0.03.
The operating temperature of coking wastewater is 18~30 DEG C in above-mentioned processing procedure.
The catalysis oxidation pond be Fenton catalysis oxidation pond, sludge concentration≤500mg/L.
The surface loading of the precipitation separate tank is 0.4~0.6m3/m2·h。
Compared with prior art, the beneficial effects of the invention are as follows：
1) make full use of Fenton reagent can oxidation of organic compounds, especially suitable for difficult for biological degradation or general chemical oxidation The characteristic of the oxidation processes of organic or inorganic pollutant hard to work, high efficiency removal Pollutants in Wastewater, while drop significantly The colourity of low waste water；Ensure that coking wastewater after processing can reach《Coking chemistry emission of industrial pollutants standard》 GB16171-2012 tables 2 requirement 14 Sewage Water Emissions limit index, and can continuous-stable it is up to standard；
2) 1.2kg/ tons of water of dewatered sludge yield are reduced；
3) after deducting final sodium hydroxide tune pH value cost, calcium hydroxide medicament 0.14 yuan/ton of water of operating cost is saved；
4) PAM dehydrating agents 0.05 yuan/ton of water of operating cost is saved；
5) gas volume 0.75m is saved in sludge cake field of delivering coal3/ ton water reduces by 0.45 yuan/ton of water of operating cost；
6) labor strength is reduced.
Description of the drawings
Fig. 1 is a kind of flow chart of advanced treatment process of coking waste water of the present invention.
Specific embodiment
The specific embodiment of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of advanced treatment process of coking waste water of the present invention, includes the following steps：
Coking wastewater water quality after biochemical treatment is：CODcr≤180mg/L；Volatile phenol≤0.5mg/L；Easily release cyanogen Compound≤0.5mg/L；Oil≤5mg/L；Total nitrogen≤20mg/L；SS≤70mg/L；PH value 7~8；
Coking wastewater after biochemical treatment enters pH value regulating reservoir, with concentrated sulfuric acid tune pH value to 3~4；
It adjusts the coking wastewater after pH and introduces catalysis oxidation pond, add catalyst sulfuric acid ferrous iron and oxidant hydrogen peroxide；It urges After changing oxidation at least 1h, mixed liquor enters precipitation separate tank or ceramic filter；
PH value is adjusted to more than 7 by precipitation separate tank water outlet or ceramic filter water outlet with sodium hydroxide；
It is through treated effluent index：PH value 6~9；Suspended matter≤50mg/L；CODcr≤80mg/L；Ammonia nitrogen≤ 10mg/L；BOD5≤20mg/L；Total nitrogen≤20mg/L；Total phosphorus≤1.0mg/L；Petroleum-type≤2.5mg/L；Volatile phenol≤0.3mg/ L；Sulfide≤0.5mg/L；Sulfide≤0.5mg/L；Benzene≤0.1mg/L；Cyanide≤0.2mg/L；Polycyclic aromatic hydrocarbon≤ 0.05mg/L；The μ g/L of benzo a pyrenes≤0.03.
The operating temperature of coking wastewater is 18~30 DEG C in above-mentioned processing procedure.
The catalysis oxidation pond be Fenton catalysis oxidation pond, sludge concentration≤500mg/L.
The surface loading of the precipitation separate tank is 0.4~0.6m3/m2·h。
Following embodiment is being implemented down based on the technical solution of the present invention, gives detailed embodiment and tool The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments It is conventional method not mentionlet alone bright.
【Embodiment】
In the present embodiment, the coke-oven plant for producing 1500000 tons of scales of coke per year generates coking wastewater 76m3/ h, recirculated water and blowdown Water 52m3/ h, i.e. total process water yield are 128m3/ h, hereinafter referred to as coking wastewater.
Biochemical treatment system is using circulating biological denitrification treatment technology in two-stage A/O.
Go out the coking wastewater water quality leading indicator CODcr≤180mg/L, volatile phenol≤0.5mg/L, oil of biochemical system≤ 5mg/L, cyanide≤0.5mg/L, total nitrogen≤20mg/L, SS≤70mg/L, pH 7~8 are easily discharged.
Coking wastewater initially enters pH value regulating reservoir, and herein with concentrated sulfuric acid tune pH value in the range of 3~4, then coking is given up Water flows automatically to Fenton catalysis oxidation pond, suitable catalyst sulfuric acid ferrous iron and oxidant hydrogen peroxide is added successively, when reaction 1 is small Afterwards, water outlet enters precipitation separate tank (or ceramic filter), and the water outlet after precipitation separation or filtering enters neutralization pond, uses hydroxide Sodium is neutralized to pH value more than 7.
Reach through treated effluent quality index《Coking chemistry emission of industrial pollutants standard》GB16171- The Sewage Water Emissions limit index of 2012 tables 2 requirement.Treated water outlet send qualified discharge pond up to standard, precipitate separate tank or The separation of ceramic filter precipitation, the sludge filtered out send sludge treating block.
After technical solution described in the present embodiment is implemented, young 1345.5 tons of a generation dewatered sludge amount saves operating cost 56 Wan Yuan.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art in the technical scope disclosed by the present invention, technique according to the invention scheme and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (4)

1. a kind of advanced treatment process of coking waste water, which is characterized in that include the following steps：
Coking wastewater water quality after biochemical treatment is：CODcr≤180mg/L；Volatile phenol≤0.5mg/L；Easily release cyanide ≤0.5mg/L；Oil≤5mg/L；Total nitrogen≤20mg/L；SS≤70mg/L；PH value 7~8；
Coking wastewater after biochemical treatment enters pH value regulating reservoir, with concentrated sulfuric acid tune pH value to 3~4；
It adjusts the coking wastewater after pH and introduces catalysis oxidation pond, add catalyst sulfuric acid ferrous iron and oxidant hydrogen peroxide；It is catalyzed oxygen After changing at least 1h, mixed liquor enters precipitation separate tank or ceramic filter；
PH value is adjusted to more than 7 by precipitation separate tank water outlet or ceramic filter water outlet with sodium hydroxide；
It is through treated effluent index：PH value 6~9；Suspended matter≤50mg/L；CODcr≤80mg/L；Ammonia nitrogen≤ 10mg/L；BOD5≤20mg/L；Total nitrogen≤20mg/L；Total phosphorus≤1.0mg/L；Petroleum-type≤2.5mg/L；Volatile phenol≤0.3mg/ L；Sulfide≤0.5mg/L；Sulfide≤0.5mg/L；Benzene≤0.1mg/L；Cyanide≤0.2mg/L；Polycyclic aromatic hydrocarbon≤ 0.05mg/L；The μ g/L of benzo a pyrenes≤0.03.
2. a kind of advanced treatment process of coking waste water according to claim 1, it is characterised in that：It is burnt in above-mentioned processing procedure The operating temperature for changing waste water is 18~30 DEG C.
3. a kind of advanced treatment process of coking waste water according to claim 1, it is characterised in that：The catalysis oxidation pond is Fenton catalysis oxidation pond, sludge concentration≤500mg/L.
4. a kind of advanced treatment process of coking waste water according to claim 1, which is characterized in that the precipitation separate tank Surface loading is 0.4~0.6m3/m2·h。
CN201711401703.5A 2017-12-22 2017-12-22 A kind of advanced treatment process of coking waste water Pending CN108117192A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109516603A (en) * 2018-12-27 2019-03-26 中冶焦耐(大连)工程技术有限公司 A kind of coking wastewater stably reaching standard advanced treatment process and system

Citations (6)

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Publication number Priority date Publication date Assignee Title
CN101781039A (en) * 2010-03-05 2010-07-21 中冶焦耐(大连)工程技术有限公司 Technology for deeply processing coking wastewater through combining catalytic oxidation method and membrane separation technique
CN102464415A (en) * 2010-10-29 2012-05-23 新奥科技发展有限公司 Advanced treatment process for coal gasification wastewater
CN102897979A (en) * 2012-10-23 2013-01-30 鞍钢股份有限公司 Treatment method of coking waste water
CN105948408A (en) * 2016-06-29 2016-09-21 盐城工学院 Method for treating chemical wastewater through IFBR-EGSB-CASS (Improved Fluidized Bed Reactor-Expanded Granular Sludge Bed-Cyclic Activated Sludge System) process
CN106745961A (en) * 2016-11-25 2017-05-31 中冶赛迪工程技术股份有限公司 A kind of method and system of coking wastewater deep treatment decarburization decolouring decyanation
CN206219348U (en) * 2016-11-25 2017-06-06 中冶赛迪工程技术股份有限公司 A kind of coking advanced waste treatment system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101781039A (en) * 2010-03-05 2010-07-21 中冶焦耐(大连)工程技术有限公司 Technology for deeply processing coking wastewater through combining catalytic oxidation method and membrane separation technique
CN102464415A (en) * 2010-10-29 2012-05-23 新奥科技发展有限公司 Advanced treatment process for coal gasification wastewater
CN102897979A (en) * 2012-10-23 2013-01-30 鞍钢股份有限公司 Treatment method of coking waste water
CN105948408A (en) * 2016-06-29 2016-09-21 盐城工学院 Method for treating chemical wastewater through IFBR-EGSB-CASS (Improved Fluidized Bed Reactor-Expanded Granular Sludge Bed-Cyclic Activated Sludge System) process
CN106745961A (en) * 2016-11-25 2017-05-31 中冶赛迪工程技术股份有限公司 A kind of method and system of coking wastewater deep treatment decarburization decolouring decyanation
CN206219348U (en) * 2016-11-25 2017-06-06 中冶赛迪工程技术股份有限公司 A kind of coking advanced waste treatment system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109516603A (en) * 2018-12-27 2019-03-26 中冶焦耐(大连)工程技术有限公司 A kind of coking wastewater stably reaching standard advanced treatment process and system

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