CN104445482B - A kind of technique utilizing quenching heat energy to process coked waste water - Google Patents
A kind of technique utilizing quenching heat energy to process coked waste water Download PDFInfo
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- CN104445482B CN104445482B CN201410829435.7A CN201410829435A CN104445482B CN 104445482 B CN104445482 B CN 104445482B CN 201410829435 A CN201410829435 A CN 201410829435A CN 104445482 B CN104445482 B CN 104445482B
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- steam
- quenching
- waste water
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- coke
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Classifications
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/04—Wet quenching
-
- 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
- C02F2209/02—Temperature
-
- 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
- C02F2303/10—Energy recovery
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Coke Industry (AREA)
Abstract
The invention belongs to a kind of Coking Waste Water Treatment Process, a kind of technique utilizing quenching heat energy to process coked waste water.Including steam quenching, to the steam removal of impurity for the first time, combustible gas in steam carries out burning remove, steam cooling, to the steam second time removal of impurity and these six steps of steam boosting, the present invention has techniques below advantage: energy regenerating is more thorough, sewage disposal is more thorough, save sewage disposal expense, compare CDQ technology investment less, the present invention not only can consume the original reluctant sewage in coke-oven plant, the high pollution waste water that even sundry item produces can also process, coke-oven plant investment to sewage disposal is greatly reduced, open up new project for coal chemical enterprise and provide condition, mainly coke-oven plant self just can consume coked waste water, residue steam can be sent outside, to environmental protection contribution greatly.
Description
Technical field:
The invention belongs to a kind of Coking Waste Water Treatment Process, specially one utilize at quenching heat energy
The technique of reason coked waste water.
Background technology:
Quenching is the important step in high-temperature coking chemical industry, and traditional wet quenching technique is coke
After coming out of the stove, quenching groove deliver under quenching tower, be sprayed directly on on red Jiao with water, by the steaming of moisture
The much more popular burnt heat of hair band, is down to less than 100 degrees Celsius coke temperature, and the steam of generation is straight
Running in and be put in air, the feature of this method is reduced investment, and operation and maintenance is simple, and shortcoming is:
Along with coke quenching steam is diffused in air, substantial amounts of heat energy is not obtained by, water resources consumption
Greatly, red burnt quick refrigeration, reduces coke quality, coke powder, fuel gas and toxic organic compound etc.
It is diffused in air with entrainment with steam, major polluting atmosphere environment, also creates substantial amounts of phenol water.
The CDQ technique of current trend is a kind of method cooling down red Jiao with low temperature nitrogen, dry
During method quenching, red Jiao loads from coke dry quenching furnace top, and low temperature nitrogen is by recycle gas blower
In feeding coke dry quenching furnace, absorbing the heat of red Jiao, it is Celsius that the coke temperature after cooling is down to 200
Below degree, discharging bottom coke dry quenching furnace, the nitrogen after intensification carries out heat friendship through waste heat boiler
Changing, by-product high pressure superheated steam enters steam turbine and drives electromotor to generate electricity, the nitrogen after cooling
The pressurization of gas aerator recirculates in returning coke dry quenching furnace and uses, and this method feature is at joint
, can improve coke quality aspect and be better than wet quenching, shortcoming is: floor space is big, and equipment is tied
Structure is complicated, and manufacture difficulty is big, and maintenance cost is high, and investment is many, and these Dou Shi coke-oven plants are difficult to hold
Being subject to, be difficult to promote, also have, CDQ is the superheated vapour that the heat by red Jiao produces
Entering steam turbine and drive electrical power generators, final electric energy uses and becomes machinery on motor
Can, it is contemplated that the efficiency factor of waste heat boiler, steam turbine and electromotor, the heat energy of red Jiao is most
Only 60% changes into electric energy, so dry coke quenching method is not optimal power-economizing method.
Coked waste water is the high concentrated organic wastewater produced in coking, its complicated component, bag
Include the organic pollutions such as substantial amounts of phenols, biphenyl, pyridine, indole and quinoline, possibly together with cyanogen,
The venomous injurant such as inorganic fluorion and ammonia nitrogen, pollutant colourity is high, belongs to relatively bio-refractory
Industrial wastewater, the waste water of coke-oven plant processes and generally uses activated sludge process.
The various industry treatment technology containing phenol water has chemical oxidization method, burning method, steaming process, suction
Attached method, biochemical process, solvent extraction and emulsion liquid membrane etc..Wherein burning method, when sewage exists
During about 1000 DEG C environment of temperature, virtually any of Organic substance all resolves into nontoxic hydrogen and one
Carbonoxide, phenol is not only processed very thorough, to organic conversions various in sewage by this method
Rate reaches 99.99%, complies fully with environmental requirement.But this method needs substantial amounts of external
Thermal source, in addition it is also necessary to sewage has certain calorific value, energy consumption is high, actually promotes and is difficult to.
Coke Market is superfluous now, and coke oven load is the highest, and residue oven gas is little, a lot of coking
The most supporting coke of factory or coal gasification furnace gas making, improve methanol, synthesis ammonia or glycol unit
Load, and consume unnecessary coke, the type selecting of gasification furnace the most all selects pure oxygen-steam normal pressure
Continuous gasification process, this gasification furnace needs substantial amounts of external low-pressure steam to work as gasifying agent.
Summary of the invention:
Therefore, it is necessary to invent a kind of technique utilizing quenching heat energy to process coked waste water.
A kind of technique utilizing quenching heat energy to process coked waste water, including following operating procedure:
(1) steam quenching: red Jiao (temperature is 1000 ± 50 DEG C) of harsh output is loaded airtight
Quenching stove in, the feeder of quenching furnace bottom is passed through the steaming containing a small amount of coked waste water
Vapour, temperature is 100-150 DEG C, and steam rises in quenching stove, and red burnt heat exchange, red burnt temperature
Degree gradually decreases down 150-200 DEG C, discharges quenching stove, and vapor (steam) temperature then gradually rises up to
800-900 DEG C, discharging in the middle part of self-extinguishment coke oven, quenching stove top is reserved a certain amount of red Jiao, is made
Quenching process can be carried out continuously；
(2) to the steam removal of impurity for the first time: the steam that quenching fire grate in above-mentioned steps (1) goes out is entered
Row dedusting, separates the char particle carried secretly in steam；
(3) in order to prevent combustible gas higher containing concentration in steam, at gasification furnace when gasifying agent mistake
With generation danger during oxygen mix in journey, in steam, it is passed through a small amount of oxygen or air (according to gas
Depending on change stove aerogenic composition wants summing unit practical situation), burn and produce during quenching
Fuel gas, now vapor (steam) temperature rises to 900-1000 DEG C；
(4) steam cooling: be passed through coking in the high-temperature steam after processing in above-mentioned steps (2) dirty
Water, makes coked waste water evaporate, and reduces vapor (steam) temperature (to ＜ 200 DEG C) simultaneously, increases quantity of steam；
(5) to the steam second time removal of impurity: the steam after processing in above-mentioned steps (3) removes
Dirt, separates the coke powder carried secretly in steam, treated steam, and temperature is 150-200 DEG C；
(6) in order to ensure that steam has enough pressure head conveyings and is circulated to coke cooling, it is necessary to
Jet chimney sets supercharger, after supercharging, a part of opposing steam flow to step (1)
Middle participation quenching cycle, remainder steam is sent and is out-of-bounds passed through gasification furnace and makes as gasifying agent
With.
The present invention has a techniques below advantage:
(1) energy regenerating is more thorough: directly and waste water heat exchange, centre does not has red Jiao
Other links, in totally enclosed equipment, except the heat of pipe insulation loss, do not have energy substantially
Amount loss；
(2) sewage disposal is more thorough: pass through for the poisonous and harmful substance in coked waste water
Red burnt interval, the combustion furnace of quenching stove eventually enter in gasification furnace, and these regional temperatures all exist
More than 1000 DEG C, almost all is decomposed；
(3) sewage disposal expense is saved: the sewage producing coke per ton only has 0.3-0.4 ton,
But owing to concentration of wastewater is high, complicated component, at the activated sludge process that coke-oven plant generally uses
In science and engineering sequence, it is necessary to sewage is diluted and homoiothermic etc. pretreatment link, cause entering raw
The process water yield changing pond is very big, at the most supporting activated sludge in a Ge200Wan Dun coke-oven plant
Science and engineering sequence needs to invest about forty-two million unit, and the processing cost of waste water per ton is the highest, and every
Red Jiao of ton can produce steam 0.5-0.6 ton, so the present invention can process coke-oven plant completely
High-concentration industrial sewage；
(4) comparing CDQ technique, small investment: contrast CDQ, the present invention increases
Sewage sedimentation and sewage water filtration link, also add steam boosting link, but be omitted and follow
Ring machine, Steam Turbine, electric station, Air-Cooling Island, nitrogen station processed and circulation and desalted water
System, also eliminates activated-sludge processing apparatus, and construction cost can reduce by 1/2nd；
(5) present invention not only can consume the original reluctant sewage in coke-oven plant, even
Sundry item produce high pollution waste water can also process, be greatly reduced coke-oven plant to sewage at
The investment of reason, opens up new project for coal chemical enterprise and provides condition, mainly coke-oven plant self
Just can consume coked waste water, residue steam can be sent outside, to environmental protection contribution greatly.
Detailed description of the invention:
A kind of technique utilizing coked waste water quenching, including following operating procedure:
(1) steam quenching: red Jiao (temperature is 1000 ± 50 DEG C) of harsh output is loaded
In airtight quenching stove, it is passed through containing a small amount of coked waste water in the feeder of quenching furnace bottom
Steam, temperature is 100-150 DEG C, and steam rises in quenching stove, and red burnt heat exchange, red
Burnt temperature gradually decreases down 150-200 DEG C, discharges quenching stove, and vapor (steam) temperature is then gradually increasing
To 800-900 DEG C, discharging in the middle part of self-extinguishment coke oven, quenching stove top needs reserved a certain amount of red
Jiao, enables quenching process to be carried out continuously；
(2) to the steam removal of impurity for the first time: the steaming that quenching fire grate in above-mentioned steps (1) is gone out
Vapour carries out dedusting, separates the char particle carried secretly in steam；
(3) in order to prevent combustible gas higher containing concentration in steam, at gasification furnace when gasification
With generation danger during oxygen mix during agent, in steam, it is passed through a small amount of oxygen or air (root
Depending on wanting summing unit practical situation according to gasification furnace aerogenic composition), burn during quenching
The fuel gas produced, now vapor (steam) temperature rises to 900-1000 DEG C；
(4) steam cooling: be passed through Jiao in the high-temperature steam after processing in above-mentioned steps (3)
Change sewage, make coked waste water evaporate, reduce vapor (steam) temperature (to ＜ 200 DEG C) simultaneously, increase and steam
Vapour amount；
(5) to the steam second time removal of impurity: the steam after processing in above-mentioned steps (3) enters
Row dedusting, separates the coke powder carried secretly in steam, treated steam, and temperature is
150-200℃；
(6) in order to ensure that steam has enough pressure head conveyings and is circulated to coke cooling,
Supercharger must be set on jet chimney, after supercharging, a part of opposing steam flow to step (1)
Middle participation quenching cycle, remainder steam is passed through gasification furnace and uses as gasifying agent.
Coked waste water is owing to containing a large amount of impurity and greasy dirt, having to pass through oil removal, floating before quenching
Choosing and the physical cleaning operation such as sandstone filtration, remove the foreign material in sewage, prevent from blocking shower nozzle and
Pollute coke, simultaneously as sewage enters temperature-reducing tower after steam carries out having burnt,
Require the combustible concentration in sewage, below explosion limit, prevent from sending steam outside containing flammable
Gas concentration is higher than explosion limit, causes danger in gasification furnace.
Containing the sewage of the organic impuritiess such as phenol, benzene, ammonia, the red focus layer in quenching stove, burning
Room, this high-temperature area at three of the burning zone of gasification furnace, temperature has been above 1000 degrees Celsius,
Organic poison can decompose completely, reaches harmless treatment.
On pipeline after combustor and temperature-reducing tower after pipeline on supporting combustable gas concentration and
Oxygen concentration on-Line Monitor Device, monitors combustible gas concentration, is down to below explosion limit and can enter
Enter next link, prevent danger.
Quenching process reduces coke temperature by water vapour, owing to water vapour is noble gas, to carrying
The contribution of high coke quality is substantially the same with dry coke quenching technique.
Claims (1)
1. one kind utilizes the technique that quenching heat energy processes coked waste water, it is characterised in that: include following behaviour
Make step:
(1) steam quenching: red Jiao that the temperature of harsh output is 1000 ± 50 DEG C is loaded airtight
In quenching stove, the feeder of quenching furnace bottom is passed through the steaming containing a small amount of coked waste water
Vapour, temperature is 100-150 DEG C, and steam rises in quenching stove, and red burnt heat exchange, red burnt temperature
Degree gradually decreases down 150-200 DEG C, discharges quenching stove, and vapor (steam) temperature then gradually rises up to
800-900 DEG C, discharging in the middle part of self-extinguishment coke oven, quenching stove top is reserved a certain amount of red Jiao, is made to put out
Burnt process can be carried out continuously；
(2) to the steam removal of impurity for the first time: the steam that quenching fire grate in above-mentioned steps (1) goes out is entered
Row dedusting, separates the coke powder carried secretly in steam；
(3) in order to prevent combustible gas higher containing concentration in steam, at gasification furnace when gasifying agent mistake
With generation danger during oxygen mix in journey, in steam, it is passed through a small amount of oxygen or air, burns
The fuel gas produced during quenching, now vapor (steam) temperature rises to 900-1000 DEG C；
(4) steam cooling: be passed through coking in the high-temperature steam after processing in above-mentioned steps (3) dirty
Water, is down to less than 200 DEG C by vapor (steam) temperature while making coked waste water evaporation, increases quantity of steam；
(5) to the steam second time removal of impurity: the steam after processing in above-mentioned steps (3) removes
Dirt, separates the coke powder carried secretly in steam, treated steam, and temperature is 150-200 DEG C；
(6) in order to ensure that steam has enough pressure heads to be transported to out-of-bounds and is circulated to coke cooling,
Supercharger must be set on jet chimney, after supercharging, a part of opposing steam flow to step (1)
Middle participation quenching cycle, remainder steam delivers to out-of-bounds be passed through gasification furnace to be made as gasifying agent
With.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410829435.7A CN104445482B (en) | 2014-12-29 | 2014-12-29 | A kind of technique utilizing quenching heat energy to process coked waste water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410829435.7A CN104445482B (en) | 2014-12-29 | 2014-12-29 | A kind of technique utilizing quenching heat energy to process coked waste water |
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| CN104445482A CN104445482A (en) | 2015-03-25 |
| CN104445482B true CN104445482B (en) | 2016-08-17 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107779210A (en) * | 2016-08-31 | 2018-03-09 | 邢台旭阳科技有限公司 | A kind of wet quenching system and the method for coke quenching steam recovery |
| CN106636500B (en) * | 2016-12-27 | 2018-10-23 | 中钢集团鞍山热能研究院有限公司 | A kind of method and device of blast furnace Slag treatment coked waste water |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3790448A (en) * | 1971-03-03 | 1974-02-05 | United States Steel Corp | Method of purifying waste fluid |
| CN100551849C (en) * | 2006-02-07 | 2009-10-21 | 中冶建筑研究总院有限公司 | The coking sewage treatment method of a kind of realization the " zero release " |
| CN101224936A (en) * | 2008-01-29 | 2008-07-23 | 北京盖雅环境科技有限公司 | Process for treating coking wastewater |
| CN101993173A (en) * | 2009-08-31 | 2011-03-30 | 吉林东圣焦化有限公司 | Improved alkaline process flow with coking sewage treatment (A/O) method |
| DE102011118937A1 (en) * | 2011-11-21 | 2013-05-23 | Thyssenkrupp Uhde Gmbh | Process and apparatus for purifying waste water from a coke quench tower with shortened catchment residence time |
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Granted publication date: 20160817 Termination date: 20211229 |