CN201288106Y - Synthetic wastewater treatment system for industrial wastewater from carbonization industry - Google Patents
Synthetic wastewater treatment system for industrial wastewater from carbonization industry Download PDFInfo
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- CN201288106Y CN201288106Y CNU2008202008794U CN200820200879U CN201288106Y CN 201288106 Y CN201288106 Y CN 201288106Y CN U2008202008794 U CNU2008202008794 U CN U2008202008794U CN 200820200879 U CN200820200879 U CN 200820200879U CN 201288106 Y CN201288106 Y CN 201288106Y
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Abstract
The utility model relates to the field of water processing and discloses an industrial wastewater comprehensive wastewater processing system in the carbonization industry, which comprises an ammoniacal liquor holding groove, a wastewater heater, an air heater, an ammonia-cyanogen separator, a tar phenol purifying furnace, a catalytic cracker, a chimney, an air-water condenser, a condensing heating stand-by device, an exhaust chimney, a condensation water tank and a tar phenol recovering groove, wherein the ammoniacal liquor holding groove is communicated with the wastewater heater, the wastewater heater is respectively communicated with the air heater and the ammonia-cyanogen separator, the ammonia-cyanogen separator is respectively communicated with the tar phenol purifying furnace and the catalytic cracker, the tar phenol purifying furnace is respectively communicated with the air-water condenser and the condensing heating stand-by device, the catalytic cracker is communicated with the chimney, the air-water condenser and the condensing heating stand-by device are respectively communicated with the exhaust chimney, the condensation water tank and the tar phenol recovering groove. Applying the technical proposal, the problem of discharging wastewater outside can be effectively prevented, and the reclamation of water and the full utilization of energy sources can be realized.
Description
Technical field
The utility model relates to water treatment field, relates in particular to the trade effluent comprehensive wastewater treatment system in the coking industry.
Background technology
Coking chemical waste water is the waste water that coal forms in the high temperature carbonization process and in the gas purification, chemical products treating process, wherein contain tens kinds of pollutents such as phenol, ammonia nitrogen, cyanogen, benzene, pyridine, indoles and quinoline, complicated component, Pollutant levels height, colourity height, toxicity are big, character is highly stable, is a kind of typical organic wastewater with difficult degradation thereby.Its discharging that exceeds standard has all constituted very big harm to the mankind, aquatic products, farm crop.How to improve and solve the pollution problem of coking chemical waste water, become the problem that press for solution of pendulum in face of people environment.
Coking chemical waste water generally carries out pre-treatment according to a conventional method earlier at present, carries out biological dephenolize secondary treatment then.But coking chemical waste water is after above-mentioned processing, and indexs such as prussiate, COD and ammonia nitrogen still are difficult to up to standard in the efflux wastewater.At this situation, Chinese scholars has been carried out number of research projects in recent years, has found many more effective TREATMENT OF COKING technology.These methods roughly are divided into 4 classes such as biological treatment, chemical method, physico-chemical process and recycle.
The 1st class: biological treatment is to utilize microbiological oxidation to decompose organic method in the waste water, the second-stage treatment in the Chang Zuowei coking wastewater processing system.At present, activated sludge process is a kind of most widely used coking chemical waste water aerobe treatment technology.This method is to allow biofloculation body and active sludge fully contact with organism in the waste water; Deliquescent organism is absorbed by cell and adsorbs, and finally is oxidized to final product (mainly being CO2).The non-solubility organism is converted into dissolved organic matter earlier, then by metabolism and utilization.
But the employing biological treatment, pollutent indexs such as the CODCr in the water outlet, BOD5, NH3-N all are difficult to up to standard, particularly to the NH3-N pollutent, almost do not have Degradation.In recent years, people set about from microorganism, reactor and technical process several respects, have researched and developed biological reinforcing technology: biological fluidized bed, immobilization biological treatment technology and bio-denitrification technology etc.The development of these technology makes most of organic substances realize the biological degradation processing, and effluent quality has obtained very big improvement, makes biologic treating technique become a very promising wastewater processing technology.Iron and steel group company coke-oven plant, Hefei, Iron And Steel Company coke-oven plant, Anyang, Kunming gasification of coking factory adopt A/O (anoxic/aerobic) method biological denitrification process, operation result shows this technology stable and reliable operation, water treatment effect is good, but the treatment facility scale is big, the investment cost height.Baosteel coke-oven plant, Shanghai changes original A/O biological denitrification process into A/OO technology, and wastewater treatment efficiency is better than A/O technology, and running cost decreases, and effect is obvious.
Therefore, biological process has advantages such as wastewater treatment capacity is big, process range is wide, working cost is relatively low, and the new technology after the improvement makes Treatment of Coking Effluent reach the engineering application requiring, thereby makes this technology extensively adopt at home and abroad.But the dilution water consumption of biological degradation method is big, the treatment facility scale is big, the residence time is long, investment cost is higher, condition of water quality to waste water is strict, multiple factors such as the pH value of waste water, temperature, nutrition, toxic substance concentration, entering organic matter of water concentration, dissolved oxygen content all can have influence on growth and the effluent quality of bacterium, and this has also just proposed high requirement to operational administrative.
The 2nd class: method of chemical treatment exists at present following several:
1, the Catalytic Wet Oxidation technology is under high temperature, condition of high voltage, under catalyst action, with oxidation operation water-soluble or that suspend, finally is converted into innoxious substance N2 and CO2 discharging with airborne oxygen in water.
2, the catalytic wet oxidation method has applied widely, advantage such as oxidation rate is fast, processing efficiency is high, secondary pollution is low, recoverable energy and useful material.But, because its catalyzer costs an arm and a leg, processing cost height, and under high-temperature and high-pressure conditions, moving, strict to processing unit, the investment cost height domesticly seldom is used for wastewater treatment with this method.
3: burning method is administered waste water and is started from the 1950's.This method is waste water to be vaporific spray in the high temperature combustion furnace, and water smoke is vaporized fully, allows organism oxidation in stove in the waste water, is decomposed into perfect combustion product C O2 and H2O and a little inorganics ash content.
Adopt burning method to carry out wastewater treatment, can make and contain a large amount of NH3-N materials in the coking chemical waste water, NH3 has NO to generate in burning, but the generation of NO may cause secondary pollution.
By discovering, NH3 main resultant under the non-catalytic oxidation condition is N2, can not produce higher concentration NO and cause secondary pollution.As seen, burning disposal technology is a kind of practicable treatment process for handling coke-oven plant's high-concentration waste water.Yet, although burning method processing efficiency height does not cause secondary pollution, its expensive processing costs (be about 167 dollars/t) make most enterprises hang back, use less in China.
4, ozonize method.Ozone is a kind of strong oxidizer, can with most of organism in the waste water, microorganism reacts rapidly, can remove pollutents such as phenol in the waste water, cyanogen, and reduce its COD, BOD value, also can play decolouring, deodorizing, germ-resistant effect simultaneously.
The strong oxidizing property of ozone can be removed pollutants in waste water quickly and efficiently, and ozone is decomposed into oxygen very soon in water, can not cause secondary pollution, and operational administrative is simple and convenient.But also there is the shortcoming that investment is high, power consumption is big, processing cost is high in this method.If simultaneously misoperation, ozone can work the mischief to biology on every side.Therefore, present ozone oxidation method also is mainly used in the advanced treatment of waste water.Begun using ozone oxidative treatment coking chemical waste water in the U.S..
5, plasma technique, its be the high-energy electron that utilizes high pressure millimicrosecond pulse discharge to be produced (5～20eV), manifold effect comprehensive action such as ultraviolet ray, the organic substance in the degrading waste water.The novel environment friendly technology that the Cement Composite Treated by Plasma technology is a kind of efficient, less energy-consumption, use range is wide, treatment capacity is big also is in conceptual phase at present.There are some researches show that through the coking chemical waste water of Cement Composite Treated by Plasma, the organism macromole is broken to small molecules, biodegradable improves greatly, and again through Wastewater Treated by Activated Sludge Process, the phenol of water outlet, cyanogen, COD index all decline to a great extent, and have development prospect.But the treatment unit expense is higher, awaits the further cheap treatment unit of research and development.
6, photocatalytic oxidation is to cause reaction between electronics and the space by luminous energy, produces electronics with strong reactive behavior (hole to), and these electronics (hole to) are moved to particle surface, just can participate in the carrying out with the promote the oxidation reduction reaction.Photocatalytic oxidation all has higher removal to aldehydes matter in the water and other organism.Gao Hua etc. add catalyst fines in coking chemical waste water, blast air under UV-irradiation, all organic poisons and color in the coking chemical waste water effectively can be removed.Under the optimal light catalytic condition, the control wastewater flow is 3600mL/h, water outlet COD value is reduced to below the 100mg/L by 472mg/L, and can not detect polycyclic aromatic hydrocarbons.
At present, this method also only rests on theoretical research stage.This water treatment method can remove pollutants in waste water effectively and energy consumption is low, and very big development potentiality is arranged.But also can produce some deleterious photochemical products sometimes, cause secondary pollution.Because photocatalytic degradation is based on the absorption of system to luminous energy, therefore, requires system to have good light transmittance.So this method is applicable to low turbidity, the system that light transmission is good, can be used for the advanced treatment of coking chemical waste water.
7, electro-chemical water treatment technology, its ultimate principle are to make pollutent that Direct Electrochemistry reaction take place on electrode or the strong oxidizing property active substance that utilizes electrode surface to produce changes pollutent generation redox.Present studies show that the electrochemical oxidation process oxidation capacity is strong, technology simply, does not produce secondary pollution, is the more wide wastewater processing technology of a kind of prospect.
Adopt PbO2/Ti as the electrode degrading coking chemical waste water.The result shows: behind the electrolysis 2h, the COD value drops to 226mg/L from 2143mg/L, and the NH3-N of 760mg/L also is removed simultaneously.Research finds that also electrode materials, chloride concentration, current density, pH value all have remarkably influenced to clearance and the current efficiency in the electrochemical reaction process of COD.
Adopt the Ti/SnO2+Sb2O3+MnO2/PbO2 Treatment of Wastewater in Coking, make the clearance of phenol reach 95.8%, its electrocatalysis characteristic is better than Pb electrode, can save electric energy 33% than Pb electrode.
8, chemical coagulation and flocculation, it is to be used for handling fine suspension and the colloidal particle that natural sedimentation method in the waste water is difficult to precipitate removal, reducing the turbidity and the colourity of waste water, but invalid to dissolved organic matter, is usually used in the advanced treatment of coking chemical waste water.This method processing costs is low, both can intermittently use also and can use continuously.
The key of Coagulation Method is coagulating agent.General at present employing bodied ferric sulfate is made coagulating agent, and is better to the removal effect of CODCr, but relatively poor to the removal effect of colourity, F-.Lu of Environmental Research Institute of Zhejiang University builds the coking chemical waste water at Shanghai Baosteel such as boat, has developed a kind of coagulant special.Experimental result is found: the best effectively dosage of coagulating agent is 300mg/L, and optimal coagulation pH scope is 6.0～6.5; Coagulating agent all has very high clearance to the CODCr in the coking chemical waste water, F-, colourity and total CN, and removal effect is subjected to the influence of variation water quality less, and coagulation pH has bigger influence to the removal effect of each index.
Flocculation agent carries out coagulation, absorption and agglomeration rapidly with organic colloid particulate in waste water, can make coking wastewater deep treatment obtain better effect.Ma Yingge etc. use 3 kinds of polysilicate class flocculation agent (PASS commonly used under the same conditions, PZSS, PFSC) and Na2Fe04 (Na2FeO4) Treatment of Wastewater in Coking, experimental result shows, Na2Fe04 has excellent decolouring function, good COD removes, turbidity removes performance, and the flocs unit particle of formation is little, quantity is few, settling velocity is fast and do not form secondary pollution.
The 3rd class: physico-chemical processes comprises the technology of following several routines:
1, absorption method: be exactly to adopt sorbent material to remove the method for pollutent.
Because gac has good adsorption performance and stable chemical property, is the most frequently used a kind of sorbent material.Active carbon adsorption is applicable to the advanced treatment of waste water.But because regeneration of activated carbon system operation difficulty is big, device working cost height is promoted the use of in Treatment of Coking Effluent.The Shanghai Baosteel had once been introduced coking wastewater containing phenol and cyanide tertiary treatment technology in 1981 from Japan, but did not build third stage absorbent charcoal adsorber in the second stage of the project again, and the above is exactly one of reason.
Shanxi Coking Group Co., Ltd. utilizes the coking chemical waste water of boiler fly ash processing from biochemistry.After the biochemical outlet waste water process flyash adsorption treatment, the average removal rate of pollutent is 54.7%.Water outlet after the processing, except that ammonia nitrogen, it is close with the A/O method that other pollutent index all reaches the new emblem mark standard of country-level coking, but investment cost only is the A/O method half.This method system capital cost, running cost are all lower, and the treatment of wastes with processes of wastes against one another has good economic benefit and and environmental benefit.But, exist the water outlet ammonia nitrogen after handling to fail up to standard and the unmanageable shortcoming of waste residue simultaneously.
The employing high temperature furnace slag filters, and handles the coking chemical waste water that contains phenol 520mg/L, COD 3200mg/L with the board H-103 of Nankai macroporous resin adsorption again, treat effluent phenol content≤0.5mg/L, and COD≤80mg/L reaches discharging standards.Huang Niandong etc. have studied the cleaning action of particulate cinder to coking chemical waste water.They have done investigation to various factorss such as granular size, pH, solution filtering velocitys to the influence factor of adsorptive power, and the result shows, contains the liquid of phenol 30mg/L, is 4.5mL/min at flow velocity, and pH is 2～2.5, and under the condition that temperature is 25 ℃, the clearance of phenol is 98%.
2, utilize the flue gas treatment coking chemical waste water: " method of flue gas treatment residual coking ammonia water or all coking waste water " that reached the cooperation research and development exploitation of environmental protection company by Ministry of Metallurgical Industry Building Research General Institute and Beijing state latitude obtained national patent.After this technology is removed tar and SS with residual coking ammonia water, carry out sufficient physical-chemical reaction in the input stack gases, the heat of stack gas is all vaporized the moisture in the remained ammonia, and the SO2 reaction in ammonia and the stack gas generates the sulphur ammonium.
This patented technology has been succeedd in Huaihe River, Jiangsu steel group residual coking ammonia water treatment project and has been used.Monitoring result shows that residual coking ammonia water is all processed, has realized the zero release of waste water, has guaranteed the stack gas qualified discharge again, enters principal pollutant such as ammonia in the atmosphere, phenols, prussiate and accounts for 1.0%～4.7% of the total amount of pollutant in the remained ammonia.
This method treatment of wastes with processes of wastes against one another, reduced investment is taken up an area of and is lacked, and working cost is low, and treatment effect is good, and environmental benefit is very remarkable, is a method that extremely is worthy to be popularized.But this method requires pyrogenic ammonia amount to keep balance with the required ammonia amount of stack gas, and this has just limited the range of application of method to a certain extent.
The 4th class: cycling utilization of wastewater: with the coking chemical waste water dephenolize of high density, after solid precipitation and tar light oil are removed in purification, be sent to the coke oven quenching, realize the closed cycle of phenol water.Thereby reduced blowdown, reduced expenses such as operation.But the pollutent branch problem of this moment also is worthy of consideration.
Because when tar reclaims, existing also do not have a kind of technology can guarantee that account for total tar content 5% and good technology emulsifying water extremely strong that part of tar recovery approaching with water proportion.And domestic most designing institute and R﹠D institution only consider objectionable impurities contained in the waste water, make this part tar reclaim and become the dead angle.
To sum up, can the TREATMENT OF COKING technology successful Application, restricted by 3 factors: treatment effect, investment working cost and whether can cause secondary pollution.And present various improvement technology can't satisfy the requirement of this three aspect fully.They respectively have relative merits, and this just need select to be fit to the technological method of own characteristic with suiting measures to local conditions, and the combination of existing method is obtained satisfied effect.Simultaneously, to research and develop further also that treatment effect is better, the investment working cost is lower, the new technology of non-secondary pollution, easy handling management, could be fit to national conditions more like this, just have more vast potential for future development.
The utility model content
The utility model embodiment provides a kind of Waste Water Treatment, can effectively prevent the problem that waste water effluxes, and the recycling, the energy that reach water make full use of.
The Waste Water Treatment that the utility model embodiment provides comprises: ammoniacal liquor leaves standstill groove, waste water well heater, airheater, ammonia cyanogen separator, tar-acids purification furnace, catalytic cracker, chimney, air water condenser, the standby device of condensation heating, exhaust chimney, condensation water tank, tar-acids accumulator tank;
Wherein, ammoniacal liquor leaves standstill groove and is connected with the waste water well heater, the waste water well heater is connected with airheater, ammonia cyanogen separator respectively, ammonia cyanogen separator is connected with tar-acids purification furnace, catalytic cracker respectively, the tar-acids purification furnace is connected with air water condenser, the standby device of condensation heating respectively, catalytic cracker is connected with chimney, and air water condenser, the standby device of condensation heating are connected with exhaust chimney, condensation water tank, tar-acids accumulator tank respectively;
After industry water of condensation, waste water entered the ammoniacal liquor circulation groove and leaves standstill, unnecessary waste water entered airheater, waste water well heater, at high temperature reductant is carried out the oxidation neutralization, and the waste water after the neutralizing treatment enters ammonia cyanogen separator:
Ammonia cyanogen of separating and aqueous vapor enter the ammonia catalytic pyrolyzer jointly and carry out the combustion oxidation decomposition, and the combustion oxidation thing enters atmosphere by chimney,
Distilled ammonia wastewater after ammonia cyanogen separates, enter the tar-acids purification furnace, distill purification, evaporate the moisture in the waste water, to evaporate remaining material and insert the tar-acids accumulator tank, the water vapor that evaporates enters the water cooler condenser, and the standby device of condensation heating uses the heat that condensation produced to use for heating, and it is standby that the water after the water cooler condenser condenses enters condensation water tank.
By on see, use the Waste Water Treatment of the utility model embodiment, after industry water of condensation, waste water enter the ammoniacal liquor circulation groove and leave standstill, unnecessary waste water enters airheater, waste water well heater, at high temperature reductant is carried out the oxidation neutralization, waste water after the neutralizing treatment enters ammonia cyanogen separator: ammonia cyanogen of separating and aqueous vapor enter the ammonia catalytic pyrolyzer jointly and carry out the combustion oxidation decomposition, and the combustion oxidation thing (experimental results show that: 96% the burned N of being decomposed into of ammonia cyanogen phenol
2, CO
2And H
2O enters in the atmosphere, and the ammonia amount that enters simultaneously in the atmosphere is 3165g/h, and its emission concentration is 62mg/Nm
3, the cyanogen amount is 76g/h, the emission concentration of cyanogen is 1.2mg/Nm
3, the whole combustion decomposition of phenol) and enter atmosphere by chimney, ejecta does not contain pollution substance, has effectively prevented the problem that waste water effluxes.
In addition, the distilled ammonia wastewater after ammonia cyanogen separates enters the tar-acids purification furnace, distills purification, evaporates the moisture in the waste water, evaporates remaining material and enters the tar-acids accumulator tank and reclaim.The water vapor that the tar-acids purification furnace evaporates enters the water cooler condenser, and the standby device of condensation heating uses the heat that condensation produced to use for heating, and it is standby that the water after the water cooler condenser condenses enters condensation water tank.As seen using recycling, the energy that this Waste Water Treatment can reach water makes full use of.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, does not constitute to improper qualification of the present utility model, in the accompanying drawings:
The structural principle synoptic diagram of the flare system that Fig. 1 provides for the utility model embodiment.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to qualification of the present utility model.
Embodiment 1:
Along with the development of society, energy-conservation, water saving, environmental requirement meeting are more and more higher, from whole coking or blue charcoal Waste Water Treatment, how to handle more and more significant of the problem of effluxing from total system.
And existing wastewater processing technology only is to handle at the contained objectionable impurities of waste water, so the effect of handling generally can not be up to standard.
At present situation, the contriver has researched and developed this Waste Water Treatment through integration and the effort in 1 year, has finished coal tar industry industrial waste water purifying and has handled and recovery and utilization technology, and proving its feasibility by experiment, itself and coal tar and petroleum industry engineering have fabulous system's suitability.The structure of this system as shown in Figure 1, as shown, this Waste Water Treatment comprises: ammoniacal liquor leaves standstill groove, waste water well heater, airheater, ammonia cyanogen separator, tar-acids purification furnace, catalytic cracker, chimney, air water condenser, the standby device of condensation heating, exhaust chimney, condensation water tank, tar-acids accumulator tank; Wherein, ammoniacal liquor leaves standstill groove and is connected with the waste water well heater, the waste water well heater is connected with airheater, ammonia cyanogen separator respectively, ammonia cyanogen separator is connected with tar-acids purification furnace, catalytic cracker respectively, the tar-acids purification furnace is connected with air water condenser, the standby device of condensation heating respectively, catalytic cracker is connected with chimney, and air water condenser, the standby device of condensation heating are connected with exhaust chimney, condensation water tank, tar-acids accumulator tank respectively.
The principle of work of this Waste Water Treatment is as follows:
After industry water of condensation, waste water enter the ammoniacal liquor circulation groove and leave standstill, unnecessary waste water enters airheater, waste water well heater, at high temperature reductant is carried out the oxidation neutralization, waste water after the neutralizing treatment enters ammonia cyanogen separator: ammonia cyanogen of separating and aqueous vapor enter the ammonia catalytic pyrolyzer jointly and carry out the combustion oxidation decomposition, and the combustion oxidation thing enters atmosphere by chimney.96% the burned N that is decomposed into of ammonia cyanogen phenol
2, CO
2And H
2O enters in the atmosphere, and the ammonia amount that enters simultaneously in the atmosphere is 3165g/h, and its emission concentration is 62mg/Nm
3, the cyanogen amount is 76g/h, the emission concentration of cyanogen is 1.2mg/Nm
3, the whole combustion decomposition of phenol, as seen: ejecta does not contain pollution substance, has effectively prevented the problem that waste water effluxes.
Ammonia cyanogen separator carries out the distilled ammonia wastewater after ammonia cyanogen separates, enter the tar-acids purification furnace, distill purification, evaporate the moisture in the waste water, will evaporate remaining material and insert the tar-acids accumulator tank, the water vapor that evaporates enters the water cooler condenser, the standby device of condensation heating uses the heat that condensation produced to help making full use of the energy for the heating use, and simultaneously, it is standby that the water after the water cooler condenser condenses enters condensation water tank, reached the recycling of water, the making full use of of the energy.
To sum up, the waste water that uses this flare system can effectively prevent to carry out a biological disposal upon to exist becomes the problem that waste gas effluxes (or the new water of admixture dilute efflux into), also solved the defective of burning disposal on the initial principle, and the recycling, the energy that reach water (well below the existing national standard) up to standard fully that make full use of, efflux, and can reclaim the tar close with water-mass density, reduced total system input and running cost simultaneously.
The principle of work of this Waste Water Treatment has mainly been carried out improvement and continuity from the technology of coking (blue charcoal) itself, its main reasonableness is embodied in following aspect:
1, solve in the source of contained tar from waste water.And later wastewater processing technology development trend will can utilize thing further to refine recovery in waste water both at home and abroad, if adopt conventional biological treatment, must contained tar be reclaimed, and from existing tar recovery technology, substantially there are following two kinds: the one, filtration method, the one, settled process.And settled process also can't reclaim and the nearer tar of water proportion, and before the filtration method the eighties relatively more in vogue, but filtration method exists the continuity that the regeneration of filtrate can't reach industrial requirement, eliminates from market.
And this Waste Water Treatment carries out the dehydration of still coke oil after adopting tar to reclaim, and the coal-tar middle oil recovery technology of waste water is become the removing process of burnt W/O, and the transformation of mentality of designing makes the difficult problem that tar reclaims no longer to be become in all wastewater treatments.
2, owing to coking (blue charcoal) factory, a large amount of coal gas of generation are used for power plant for self-supply more, and the flue gas heat that effluxes that adopts loss is bigger.Utilize the flue gas waste heat recovery technology can solve the heat problem that distillation method reclaims tar.The existing tar burning of waste water effluxes resource that causes and energy dissipation and avoided flue gas to handle fully.After the detar, waste water becomes waste gas, present technique is carried out the structure redesign with the coal gas boiler of power plant for self-supply, the combustion chamber of boiler is modified as independent purifying and catalyzing oxidized still, change the water body of boiler into vapour generator, after waste gas entered the purifying and catalyzing oxidized still, quite the very sophisticated waste gas secondary combustion of my company was handled, useless flue gas after the processing enters vapour generator, and its heat exchange efficiency is higher than the heat exchange efficiency of flue gas in boiler far away.Make energy-saving effect more obvious.
3, after useless flue gas goes out vapour generator, through the combustion air well heater, through the tar well heater before the distillation, further cooled off and condensation again, pass through the water of smoke water separator reclaiming clean again, the residue flue gas is through the flue gas desulphurization system of mature technology.Directly and in the chimney of power plant, efflux.
Since the technological borrowing of this Waste Water Treatment the advantage of existing various wastewater facture principle, changed original processed conventionally shortcoming simultaneously again, certainly will will in coal tar Waste Water Treatment trade effluent, be in international and leading domestic level.Though fixed input than conventional system increase, still, the tar of increasable input and conventional processing fado recovery in 1 year is worth quite, so this Waste Water Treatment system moves about 4 years, recoverable whole inputs.And after the conventional processing method operation, have only every year and drop into and do not have an income.
For the better superiority of this Waste Water Treatment of explanation, below by experiment this Waste Water Treatment is further described:
The waste water that 800,000 tons/year blue charcoal Waste Water Treatment produces is by 24 tons of accounting (actual generation: about about 21 tons), and the annual tar that produces is pressed 70,000 tons of accounting, per hour enters the tar content that effluxes in the waste water and is: 416Kg.Also contain phenol, CN in the waste water
-, S
2-, NH
3-N, S, S
2O
3 2-, NO
- 2, CL
-Deng pollutent, belonging to is one of the most unmanageable sewage.Water-quality COD 3000-the 8000mg/L of waste water, phenol 150-700mg/L, cyanogen 50-200mg/L, oil 150-700mg/L, ammonia nitrogen 1500-4000mg/L.Native system water quality is by following COD3500mg/L, phenol 350mg/L, cyanogen 150mg/L, oily 360mg/L, the ammonia nitrogen 3500mg/L of designing.
Use this treatment system that above-mentioned waste water is handled:
After blue charcoal (coking) factory industry water of condensation, waste water enter the ammoniacal liquor circulation groove and leave standstill, waste water, reclaim the density tar heavier and light in the waste water than water, while insoluble tar slag and mud, because the adding of water in water of condensation and the coal, water is more and more in the ammoniacal liquor circulatory pool, keeps balance for keeping the pond, unnecessary water need discharge, and also contains phenol, CN in the waste water but contain inside the water that need efflux
-, S
2-, NH
3-N, S, S
2O
3 2-, NO
- 2, pollutent such as CL, directly efflux and to produce great pollution, this Waste Water Treatment is according to the circulatory pool SEA LEVEL VARIATIONS DURING, extracting unnecessary water with corrosion-resistant pump enters in the oxygen enrichment and oxidizer, at high temperature reductant is carried out the oxidation neutralization, effectively reduce COD (by dropping to about 420mg/L about original 3500mg/L), enter ammonia steaming system and ammonia cyanogen separator again, ammonia nitrogen 3500mg/L in the waste water is reduced to below the 200mg/L, cyanogen 150mg/L reduces to below the 70mg/L, and phenol is reduced to below the 300mg/L by 350mg/L.
Cyanogen separates the back and enters the ammonia catalytic pyrolyzer jointly with nearly five tons of aqueous vapors, carries out combustion oxidation and decomposes, and 96% ammonia cyanogen phenol is decomposed into N
2, CO
2And H
2O enters in the atmosphere, and the ammonia amount that enters simultaneously in the atmosphere is 3165g/h, and its emission concentration is 62mg/Nm
3, the cyanogen amount is 76g/h, its emission concentration is 1.2mg/Nm
3, the whole combustion decomposition of phenol.
Remaining distilled ammonia wastewater, enter the tar-acids purification furnace, distill purification, evaporate the moisture in the waste water, the phenol of taking out of with steam according to vapour phase liquid EQUILIBRIUM CALCULATION FOR PROCESS is: 0.8Kg/h, materials such as the tar-acids after remaining concentrate are approaching with tar recovery place composition, squeeze into the tar filling after the recovery and enter next procedure.
The steam that evaporates enters the water cooler condensation, and (the condensation heat release is reclaimed, be used for heating), condensed water (including phenol 0.68Kg/h through the balance accounting) is with filtering stainless steel water tank for entering, after further filtering, its water quality satisfies fully washes the burnt usefulness of ammonia, cooling coal gas and breath, contain outside a large amount of CO2, the H2O and efflux, also contain 120g/h phenol with combustion product gases.High-temperature flue gas directly contacts with distilled ammonia wastewater, and COD is reduced to below the 100mg/L by 420mg/L.
Experimental results show that: use this Waste Water Treatment, recyclable tar carbolic oil 14kg/h, 17 tons of water of condensation; Year is reclaimed 112 tons of tar carbolic oil, and recovery brings benefits: 22.4 ten thousand yuan; Water of condensation: 136000 tons, recovery brings benefits: 2.72 ten thousand yuan; Waste heat recovery heating joint bunker coal: 8640 tons, reduce expenses: 172.8 ten thousand yuan; The common property benefit that comes into force is: 197.92 ten thousand yuan/year.
This Waste Water Treatment running cost is as follows:
Overhaul of the equipments expense (pressing major equipment life-span and usual maintenance accounting): 450,000 yuan/year; Personnel are by each people of class Three, and personnel's wage amounts to: 5.4 ten thousand yuan; Gas using quantity: 6000Nm
3/ h; Power consumption 150KW, year electricity cost: 38.4 ten thousand yuan; Operation expense except that gas charge: 88.8 ten thousand yuan; Efflux in the waste gas, its sulphur of 98% produces because of containing combustion of sulfur in the coal gas, when adopting blue charcoal producer gas, and 75% of the sulphur total amount outer atmosphere that is discharged in the coal gas, all the other exist in the tar and water of condensation that reclaims, and total system needs the coal gas amount to be: 6000Nm
3/ h, the exhausted air quantity that total system produces is: 76000Nm
3/ h, the sulphur discharge capacity is: 6.97～7.8Kg/h, emission concentration is: 91～102mg/Nm
3,, can not consider the emission problem of sulphur if adopt calcium carbide stove exhaust.
The whole process of waste water comprehensive wastewater treatment system has comprised physical change, chemical transformation, reaction kinetics, katalysis, aerodynamics, thermodynamics, the hot combined process of moving, pyrology, fluidics.
1, tar reclaims principle:
Tar boiling point: 163.5 ℃
The boiling point of phenol: 134 ℃
Water boiling point: 96 ℃
Compound dissolutions such as phenol, cyanogen, ammonia exist with gas when normal temperature in water
2, pollutant oxidation cleaning principle:
Find out from above-mentioned reaction, generate CO after the principal pollutant oxidation in the sewage
2, and N
2And water vapor, with the treatment effect of this treatment system and estimate treatment effect (with blue charcoal coal gas processing time):
1, tar reclaims and can reach 90%. recyclable tar: 372Kg/h;
2, behind the catalyzing, oxidizing and purifying, the objectionable impurities clearance;
3, to phenol and organic clearance: 97-99%;
4, to NH
3(NH
+) clearance: 83-95%; To CN
-Clearance: 90-96%;
5, enter waste gas situation in the atmosphere referring to table one:
Table one
As fully visible, use this Waste Water Treatment, adopt purification of waste water processing and recovery and utilization technology, can make trade effluent reach zero release.Reclaiming tar generation economic benefit simultaneously, solve sewage pollution, reaction heat produces steam through heat reclaim unit, and can be directly used in generating, also can bring certain economic benefits to enterprise, useless flue gas enters the pollutent in the atmosphere, can reach the emission standard that requires among the GB16297-1996.Enterprise reduces the effluent charge and the expense that exceeds standard, and also can bring certain economic benefits to enterprise, and the environment around making simultaneously improves.
More than technical scheme that the utility model embodiment is provided be described in detail, used specific case herein principle and the embodiment of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as restriction of the present utility model.
Claims (1)
1, a kind of Waste Water Treatment, it is characterized in that, comprising: ammoniacal liquor leaves standstill groove, waste water well heater, airheater, ammonia cyanogen separator, tar-acids purification furnace, catalytic cracker, chimney, air water condenser, the standby device of condensation heating, exhaust chimney, condensation water tank, tar-acids accumulator tank;
Wherein, ammoniacal liquor leaves standstill groove and is connected with the waste water well heater, the waste water well heater is connected with airheater, ammonia cyanogen separator respectively, ammonia cyanogen separator is connected with tar-acids purification furnace, catalytic cracker respectively, the tar-acids purification furnace is connected with air water condenser, the standby device of condensation heating respectively, catalytic cracker is connected with chimney, and air water condenser, the standby device of condensation heating are connected with exhaust chimney, condensation water tank, tar-acids accumulator tank respectively;
After industry water of condensation, waste water entered the ammoniacal liquor circulation groove and leaves standstill, unnecessary waste water entered airheater, waste water well heater, at high temperature reductant is carried out the oxidation neutralization, and the waste water after the neutralizing treatment enters ammonia cyanogen separator:
Ammonia cyanogen of separating and aqueous vapor enter the ammonia catalytic pyrolyzer jointly and carry out the combustion oxidation decomposition, and the combustion oxidation thing enters atmosphere by chimney,
Distilled ammonia wastewater after ammonia cyanogen separates, enter the tar-acids purification furnace, distill purification, evaporate the moisture in the waste water, to evaporate remaining material and insert the tar-acids accumulator tank, the water vapor that evaporates enters the water cooler condenser, and the standby device of condensation heating uses the heat that condensation produced to use for heating, and it is standby that the water after the water cooler condenser condenses enters condensation water tank.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063656A (en) * | 2011-10-24 | 2013-04-24 | 上海宝钢化工有限公司 | Instrument measuring method for total nitrogen in coking wastewater |
| CN104445815A (en) * | 2014-11-21 | 2015-03-25 | 陕西华祥能源科技集团有限公司 | Technological method and device for semi-coke production wastewater resource utilization |
| CN112023847A (en) * | 2020-08-24 | 2020-12-04 | 河南省德耀节能科技股份有限公司 | Efficient comprehensive recycling system and method for mine heat |
-
2008
- 2008-09-23 CN CNU2008202008794U patent/CN201288106Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063656A (en) * | 2011-10-24 | 2013-04-24 | 上海宝钢化工有限公司 | Instrument measuring method for total nitrogen in coking wastewater |
| CN103063656B (en) * | 2011-10-24 | 2015-10-28 | 上海宝钢化工有限公司 | The instrumental method method of total nitrogen in coking chemical waste water |
| CN104445815A (en) * | 2014-11-21 | 2015-03-25 | 陕西华祥能源科技集团有限公司 | Technological method and device for semi-coke production wastewater resource utilization |
| CN112023847A (en) * | 2020-08-24 | 2020-12-04 | 河南省德耀节能科技股份有限公司 | Efficient comprehensive recycling system and method for mine heat |
| CN112023847B (en) * | 2020-08-24 | 2023-10-13 | 浙江德耀节能科技股份有限公司 | Efficient submerged arc comprehensive recycling system and method |
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