CN209507819U - A kind of coking wastewater stably reaching standard advanced treatment system - Google Patents
A kind of coking wastewater stably reaching standard advanced treatment system Download PDFInfo
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- CN209507819U CN209507819U CN201822219877.6U CN201822219877U CN209507819U CN 209507819 U CN209507819 U CN 209507819U CN 201822219877 U CN201822219877 U CN 201822219877U CN 209507819 U CN209507819 U CN 209507819U
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Abstract
The utility model relates to a kind of coking wastewater stably reaching standard advanced treatment systems, including sequentially connected pH conditioning tank, catalysis oxidation pond, immersed ultrafiltration membrane pond and neutralization pond；The pH conditioning tank sets concentrated sulfuric acid throwing device, and the water inlet of pH conditioning tank connects biochemical unit outlet conduit, and catalysis oxidation pond sets ferrous sulfate throwing device and hydrogen peroxide throwing device, and neutralization pond sets sodium hydroxide throwing device；Immersed ultrafiltration membrane pond sets return sludge pump, and the returned sludge entrance in catalysis oxidation pond is connected by sludge return pipe, and in addition sludge return pipe connects sludge treating system, neutralization pond connects water outlet pipeline or reverse osmosis units up to standard.The utility model can ensure that coking wastewater after processing can stably reach 14 Sewage Water Emissions limit index of " coking chemistry emission of industrial pollutants standard " GB16171-2012 table 2 requirement, reduce the discharge amount of pollutant, it can reduce operating cost again, improve environmental benefit.
Description
Technical field
The utility model relates to Technologies of Coke Plant Wastewater Treatment field more particularly to a kind of coking wastewater stably reaching standard depths
Reason system.
Background technique
Existing Fenton catalytic oxidation technologies processing cost of investment is low, and effect is relatively stable, but the processing index of cyanide
It is influenced clearly by raw water concentration of cyanide, raw water concentration of cyanide slightly fluctuates cyanide index will be exceeded, and produces
The sludge quantity that process added amount of chemical is big, generates is also very more, considerably increases operating cost and the labor intensity of worker.
Summary of the invention
The utility model provides a kind of coking wastewater stably reaching standard advanced treatment system, it can be ensured that coke after processing
14 water pollutions of " coking chemistry emission of industrial pollutants standard " GB16171-2012 table 2 requirement can be stably reached by changing waste water
Object emission limit index, that is, reduce the discharge amount of pollutant, and can reduce operating cost, improves environmental benefit.
In order to achieve the above object, the utility model is implemented with the following technical solutions:
A kind of coking wastewater stably reaching standard advanced treatment system for realizing the technique, including sequentially connected pH tune
Save pond, catalysis oxidation pond, immersed ultrafiltration membrane pond and neutralization pond；The pH conditioning tank sets concentrated sulfuric acid throwing device, pH conditioning tank
Water inlet connects biochemical unit outlet conduit, and catalysis oxidation pond sets ferrous sulfate throwing device and hydrogen peroxide throwing device, neutralizes
Pond sets sodium hydroxide throwing device；Immersed ultrafiltration membrane pond sets return sludge pump, connects catalysis oxidation pond by sludge return pipe
Returned sludge entrance, in addition sludge return pipe connects sludge treating system, neutralization pond connect water outlet pipeline up to standard or
Reverse osmosis units.
The catalysis oxidation pond is Fenton catalysis oxidation pond.
The ultrafiltration membrane being made of ultrafiltration membrane filaments is set in the immersed ultrafiltration membrane pond, and the material of ultrafiltration membrane filaments is polytetrafluoroethyl-ne
Alkene.
The aperture of the ultrafiltration membrane filaments is 0.1~0.2 μm.
Compared with prior art, the utility model has the beneficial effects that
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 removes Pollutants in Wastewater, while dropping significantly
The coloration of low waste water；Ensure that coking wastewater after processing can stably reach " coking chemistry emission of industrial pollutants standard "
14 Sewage Water Emissions limit index that GB16171-2012 table 2 requires, that is, reduce the discharge amount of pollutant, and can reduce
Operating cost improves environmental benefit；
2) energy-saving, reduce enterprise operation cost；Compared with existing Fenton catalytic oxidation technologies, dewatered sludge yield subtracts
Few 1.35kg/ tons of water；After deducting final sodium hydroxide tune pH value cost, 0.14 yuan/ton of calcium hydroxide medicament operating cost is saved
Water；Save 0.05 yuan/ton of water of PAM dehydrating agent operating cost；Sludge cake deliver coal field save gas volume 0.75m3/ ton water reduces fortune
0.45 yuan/ton of water of row cost；By treatment scale 100m3/ h sewage quantity is calculated, and year saves 134.9 ten thousand yuan of operating cost；
3) technical process is simple, and sludge part flows back in addition, greatly reduces labor intensity of workers.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of coking wastewater stably reaching standard advanced treatment system described in the utility model.
Specific embodiment
Specific embodiment of the present utility model is described further with reference to the accompanying drawing:
As shown in Figure 1, a kind of coking wastewater stably reaching standard depth for realizing the technique described in the utility model
Reason system, including sequentially connected pH conditioning tank, catalysis oxidation pond, immersed ultrafiltration membrane pond and neutralization pond；The pH conditioning tank is set
The water inlet of concentrated sulfuric acid throwing device, pH conditioning tank connects biochemical unit outlet conduit, and catalysis oxidation pond sets ferrous sulfate and adds
Device and hydrogen peroxide throwing device, neutralization pond set sodium hydroxide throwing device；Immersed ultrafiltration membrane pond sets return sludge pump, passes through dirt
Mud reflux line connects the returned sludge entrance in catalysis oxidation pond, in addition sludge return pipe connects sludge treating system, neutralizes
Pond connects water outlet pipeline or reverse osmosis units up to standard.
The catalysis oxidation pond is Fenton catalysis oxidation pond.
The ultrafiltration membrane being made of ultrafiltration membrane filaments is set in the immersed ultrafiltration membrane pond, and the material of ultrafiltration membrane filaments is polytetrafluoroethyl-ne
Alkene.
The aperture of the ultrafiltration membrane filaments is 0.1~0.2 μm.
It is as follows using the coking wastewater stably reaching standard advanced treatment process of system described in the utility model:
1) the coking wastewater water quality after biochemical treatment meets following require: CODcr≤180mg/L；Volatile phenol≤
0.5mg/L；Easily release cyanide≤0.5mg/L；Oil≤5mg/L；Total nitrogen≤20mg/L；SS≤70mg/L；
2) coking wastewater met the requirements enters pH conditioning tank, with concentrated sulfuric acid tune pH value to 3~4；
3) coking wastewater after adjusting pH introduces catalysis oxidation pond, adds catalyst sulfuric acid ferrous iron and oxidant hydrogen peroxide；
After catalysis oxidation at least 1h, mixed liquor enters immersed ultrafiltration membrane pond；
4) the suction pump water outlet in immersed ultrafiltration membrane pond enters neutralization pond, and pH value is adjusted to 7 or more with sodium hydroxide；
Through above-mentioned steps treated effluent index are as follows: pH value 7~8；Turbidity≤0.5NTU；50≤CODcr≤80mg/L；
Ammonia nitrogen≤10mg/L；BOD5≤10mg/L；Total nitrogen≤20mg/L；Total phosphorus≤0.5mg/L；Petroleum-type≤1mg/L；Volatile phenol≤
0.1mg/L；Sulfide≤0.5mg/L；Benzene≤0.1mg/L；Cyanide≤0.2mg/L；Polycyclic aromatic hydrocarbon≤0.05mg/L；Benzo a
Pyrene≤0.03 μ g/L；
5) standard water discharge discharge or feeding reverse osmosis units are further processed.
The operating temperature of coking wastewater is 18~30 DEG C in the technical process.
Sludge concentration >=1000mg/L in the catalysis oxidation pond.
Sludge concentration≤10000mg/L of the ultrafiltration membrane pool control.
The design water flux of the ultrafiltration membrane is 0.5m3/m2D, design aeration quantity are 0.3m3/m2H, wind pressure 34kPa.
The high concentration sludge in the immersed ultrafiltration membrane pond flows back into catalysis oxidation pond or discharge system.
Following embodiment is implemented under premised on technical solutions of the utility model, gives detailed embodiment
With specific operating process, but the protection scope of the utility model is not limited to the following embodiments.Side used in following embodiments
Method is conventional method unless otherwise instructed.
[embodiment]
In the present embodiment, for producing the coke-oven plant of 1,500,000 tons of scales of coke per year, coking wastewater 76m is generated3/ h, is followed
Ring water and sewerage 52m3/ h, i.e. total process water yield are 128m3/ h, hereinafter referred to as coking wastewater.
Biochemical treatment unit is using circulating biological denitrification treatment technology in two-stage A/O.
Coking wastewater water quality main indicator CODcr 167mg/L, the volatile phenol 0.46mg/L, oil of biochemical processing unit out
4.3mg/L, easily release cyanide 0.41mg/L, total nitrogen 16.5mg/L, SS 66.2mg/L, pH 7.3.
Coking wastewater after biochemical treatment initially enters pH conditioning tank, with concentrated sulfuric acid tune pH value to 3.5, draws by gravity stream
Enter catalysis oxidation pond, water inlet end adds that catalyst sulfuric acid is ferrous and oxidant hydrogen peroxide in catalysis oxidation pond, by 2 hours
After catalysis oxidation, mixed liquor enters immersed ultrafiltration membrane pond, and water outlet enters neutralization pond under suction pump swabbing action, uses in neutralization pond
The pH value of coking wastewater is adjusted to 7.5 by sodium hydroxide solution.
In order to improve the concentration of iron ion catalyst in catalysis oxidation pond, by return sludge pump in immersed ultrafiltration membrane pond
High concentration sludge flow back into catalysis oxidation pond, or remaining chemical sludge is discharged by return sludge pump.
Through the above process treated system effluent quality index are as follows: pH value 7.6；Turbidity 0.44NTU；CODcr
62.9mg/L；Ammonia nitrogen 8.96mg/L；BOD59.1mg/L；Total nitrogen 17.6mg/L；Total phosphorus 0.41mg/L；Petroleum-type 0.88mg/L；
Volatile phenol 0.078mg/L；Sulfide 0.458mg/L；Benzene 0.087mg/L；Cyanide 0.103mg/L；Polycyclic aromatic hydrocarbon 0.037mg/
L；0.024 μ g/L of benzo a pyrene；Meet 14 that " coking chemistry emission of industrial pollutants standard " GB16171-2012 table 2 requires
The requirement of Sewage Water Emissions limit index.
After technical solution described in the present embodiment is implemented, about 1514 tons of a young generation dewatered sludge amount saves operating cost about
172.7 ten thousand yuan.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (4)
1. a kind of coking wastewater stably reaching standard advanced treatment system, which is characterized in that including sequentially connected pH conditioning tank, catalysis
Oxidation pond, immersed ultrafiltration membrane pond and neutralization pond；The pH conditioning tank sets concentrated sulfuric acid throwing device, the water inlet connection of pH conditioning tank
Biochemical unit outlet conduit, catalysis oxidation pond sets ferrous sulfate throwing device and hydrogen peroxide throwing device, neutralization pond set hydroxide
Sodium throwing device；Immersed ultrafiltration membrane pond sets return sludge pump, and the returned sludge in catalysis oxidation pond is connected by sludge return pipe
In addition entrance, sludge return pipe connect sludge treating system, neutralization pond connects water outlet pipeline or reverse osmosis units up to standard.
2. a kind of coking wastewater stably reaching standard advanced treatment system according to claim 1, which is characterized in that the catalysis
Oxidation pond is Fenton catalysis oxidation pond.
3. a kind of coking wastewater stably reaching standard advanced treatment system according to claim 1, which is characterized in that the submergence
The ultrafiltration membrane being made of ultrafiltration membrane filaments is set in ultrafiltration membrane pool, and the material of ultrafiltration membrane filaments is polytetrafluoroethylene (PTFE).
4. a kind of coking wastewater stably reaching standard advanced treatment system according to claim 3, which is characterized in that the ultrafiltration
The aperture of film wire is 0.1~0.2 μm.
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| CN201822219877.6U CN209507819U (en) | 2018-12-27 | 2018-12-27 | A kind of coking wastewater stably reaching standard advanced treatment system |
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Cited By (1)
| 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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Cited By (1)
| 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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