CN105439359A - Phenol-containing sewage treatment method and equipment - Google Patents
Phenol-containing sewage treatment method and equipment Download PDFInfo
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- CN105439359A CN105439359A CN201511017466.3A CN201511017466A CN105439359A CN 105439359 A CN105439359 A CN 105439359A CN 201511017466 A CN201511017466 A CN 201511017466A CN 105439359 A CN105439359 A CN 105439359A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/048—Purification of waste water by evaporation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention provides a phenol-containing sewage treatment method. The method comprises steps as follows: phenol-containing sewage is filtered and concentrated to form concentrated water for standby use, medium-rank coal and low-rank coal are crushed, sieved, dried and uniformly mixed and stirred with the concentrated water, phenol water coal slime is formed, and the mass ratio of the concentrated water to the medium-rank and low-rank coal is (10-45):100; the phenol water coal slime is sent into a fluidized bed boiler for combustion, and thermal energy formed through combustion is recycled. The invention further provides treatment equipment. The treatment equipment comprises a phenol-containing sewage storage tank, a filtration tank, a negative-pressure evaporator, a dewatering and drying device, a mixer and a fluidized bed boiler, wherein a phenol-containing sewage inlet is formed in the top of the negative-pressure evaporator, a concentrated water outlet is formed in the bottom of the negative-pressure evaporator, a concentrated water inlet is formed in one side wall of the mixer, a phenol water coal slime outlet is formed in the other side wall of the mixer, and the concentrated water inlet is connected with the concentrated water outlet through a pipeline. The phenol-containing sewage treatment method is simple, convenient to operate and low in cost, cannot cause pollution to the environment and is completely environment-friendly.
Description
Technical field
The present invention relates to industrial sewage and recycle field, in particular to a kind for the treatment of process and equipment of phenol-containing wastewater.
Background technology
Modern Coal-based Chemical industry water loss is large, and the sewage quantity of generation is also very large.Water resources and water environmental problems have become the bottleneck of restriction Modern Coal-based Chemical industry development, seek the sewage disposal technology that treatment effect is good, technology stability is strong, working cost is low, have become the self-demand of coal chemical industry enterprises development and external requirement.Coal Gasification Technology many employings Lurgi stove of coal preparing natural gas, BGL stove fixed bed pressured gasification technology, gasification organic sewage is mainly from raw gas washing, cooling and scavenging process draining in coal gasification course, and water quality and vapourizing furnace type, operational conditions, coal etc. are closely related.Principal pollutant in coal chemical industry sewage are phenols, comprise phenol, methylphenol, polyphenol etc., account for 40 ~ 80% of COD of sewage, nitrogenous arene simultaneously also containing monocycle, many rings, containing oxygen, sulfur heterocyclic ring class, polycyclic aromatic hydrocarbons, fatty acid, cyanogen, ammonia nitrogen etc. pollutent.
At present, phenol-containing wastewater treatment process mainly contains biochemistry, extraction, oxidation, electrolysis, stripping, absorption and burning etc.Biochemical process is the general phenol-containing wastewater treatment technology of current Application comparison.It utilizes bacteria metabolism effect, makes the aldehydes matter in waste water be degraded and be converted into innoxious substance.Biochemical process has applied range, processing power is large and processing cost is low advantage.Shortcoming is that floor space is large, by waste water pH value, temperature, affects containing factors such as phenol amounts.Extraction process utilizes the extraction agent being insoluble in water to contact with waste water, the aldehydes matter in waste water and extraction agent is made to carry out the combination of physics or chemistry, aldehydes matter is made to transfer in the middle of extraction agent, take the method for physics or chemistry to make aldehydes matter from wherein separating again, and reclaim as product.This method has that facility investment is few, floor space is little, treatment effect is good, operation controls simple, and shortcoming is that the extraction agent owing to using all has certain solubleness in water, therefore has a small amount of solvent to run off unavoidably.
Oxidation style mainly adopts the strong oxidizers such as ozone, chlorine, dioxide peroxide, clorox and hydrogen peroxide, aldehydes matter and other oxidation operation is decomposed, phenolic wastewater is purified.The advantage of this method is that treatment facility is simple, less investment, treatment effect are good, and has the advantages that to enter working order at any time, is specially adapted to the occasion of unstable discharge; Shortcoming mainly processing costs is high, is not suitable for the process occasion of high density, big yield.Electrolytic process is that the organism charged particles such as the phenols in waste water move to pole plate under electric field action, and on pole plate, redox reaction occurs, and is oxidized into the simple material such as carbonic acid gas and water, reaches the object of purifying liquid waste.This method has less investment, floor space is little, device control is easy, high treating effect; Shortcoming is that processing cost is higher.Air-extraction utilizes aldehydes matter in water and this feature of difference of solubleness in steam, realizes being separated by aldehydes matter and reclaiming, to reach the object of purification phenolic wastewater.The advantage of this method not only can not bring new pollutent into, and can realize the object reclaiming phenol, and the purity reclaiming phenol is higher, and shortcoming is that the processing cost of this method is higher, need consume a large amount of steam.The advantage of absorption method is that equipment is simple, equipment manufacturing cost is low, reduced investment, treatment effect better, floor space is also little; Shortcoming is because its loading capacity is limited, is difficult to the phenolic wastewater processing high density.Burning method is under the high temperature of 800-1000 DEG C, and phenolic wastewater is carried out burning disposal, and aldehydes matter and other organism are completely oxidized to the simple material such as carbonic acid gas and water.This method advantage is that equipment is simple, floor space is little, treatment effect is good, it is low to invest, and can process and adopt other method to be difficult to the phenolic wastewater containing phenol and simultaneously containing multiple high-enriched organics processed; Shortcoming is that thermal losses is large, and need add fuel oil, processing costs is higher, and aldehydes matter cannot reclaim, larger to the body of heater consume of incinerator.
The general cost compare for the treatment of process of visible above-mentioned phenol-containing wastewater is high, and pollution level is large, does not realize phenol-containing wastewater effectively to utilize transform and create certain economic benefit.
In view of this, special proposition the present invention.
Summary of the invention
The first object of the present invention is the treatment process providing a kind of phenol-containing wastewater, it is simple that described method has treatment process, easy to operate, cost is low, can not to the abundant environmental protection of environment, and waste treatment capacity is strong, phenol-containing wastewater zero release can be realized, phenol-containing wastewater can also be fully utilized generation heat energy to recycle, create certain economic benefit, improve the added value of phenol-containing wastewater.
The second object of the present invention is the treatment facility providing a kind of phenol-containing wastewater, described sewage treatment equipment can well coordinate the zero release achieving phenol-containing wastewater to recycle advantage with treatment process.
In order to realize above-mentioned purpose of the present invention, spy by the following technical solutions:
Embodiments provide a kind for the treatment of process of phenol-containing wastewater, comprise the steps:
Phenol-containing wastewater is for subsequent use through filtering, concentrating the dense water of formation, and middle low-rank coal is formed phenol water coal slime with described dense water mixing and stirring after crushing and screening, drying, the mass ratio of wherein said dense water and middle low-rank coal is 10-45:100 simultaneously;
Phenol water coal slime sent in fluidized-bed combustion boiler and burn, the heat energy that burning is formed is recycled.
The main treatment measures of phenol-containing wastewater of the prior art are biochemical, extraction, oxidation, electrolysis, stripping, adsorb and burn these methods, but these method costs are high, do not take into full account economy, also larger and theory that is environmental protection of polluting is disagreed, the method adopting rotary kiln to carry out phenol-containing wastewater process is also had in addition in prior art, such as application number is disclose a kind of method and system utilizing rotary kiln to carry out phenol water disposal and utilization in the patent of 201510003037.4, its method and system is: first install a jet pipe in the inside of rotary kiln head position, jet pipe is connected to phenol water pot by pipeline and pump, described jet pipe has the spout hole upwards sprayed, drop in the burned material of rotary kiln discharge after phenol water ejection atomization, form phenol water mixing steam, cooling zone under the drive of phenol water mixing steam negative-pressure air-flow in kiln forward successively in kiln, clinkering zone and preheating zone, finally discharge.But adopt this rotary kiln phenol water disposal system directly to spray phenol water, the treatment capacity absorbing phenol water is smaller, and now general conventional coal chemical industry enterprises without rotary kiln device, the materials such as the sulphur contained in phenol water, phenol, ammonia, be vaporized and form steam with fume emission, pollution level is very large, welding.
The present invention is in order to conscientiously solve the technical problem of above appearance, provide a kind for the treatment of process of phenol-containing wastewater, first phenol-containing wastewater is filtered, filtration is to be removed by the materials such as the particulate matter in sewage, tar, dust, lime-ash, and the mode of filtration can be chosen as the wherein one in sand filtration, multi-medium filtering and membrane filtration.Then the dense phenol water of concentrated formation, the mode of evaporating under concentrated method preferably selects vacuum state, temperature controls at 70-80 DEG C, this concentration method not only energy consumption is low, and be conducive to follow-up burn operation after being removed by the large water gaging in phenol-containing wastewater, if adopt film to carry out, concentrated not only energy consumption is high, operates also more complicated, film not only easily blocks but also will regenerate after using for some time, and use cost is high.
After phenol-containing wastewater pre-treatment, phenol water coal slime is mixed to form with low-rank coal in crushing and screening, drying, the rate-controlling of mix and blend is at 500-600rad/min, and preferred 550rad/min, preferably to operate to make to stir under high stir speed (S.S.) state.The mass ratio be between dense water and middle low-rank coal that wherein should be noted that, need to be strict controlled between 10-45:100, because quality proportioning between the two directly decides the effect of follow-up mixed firing, if the calorific value that the unreasonable burning of proportioning is formed afterwards is low, or incomplete combustion also can produce certain obnoxious flavour, the heat energy of generation can not be realized maximum benefit and economization.Preferably mass ratio is preferably 15-30:100, and that more excellent is 18:100, such as, can also select 16:100,17:100,21:100 etc., this index parameter is that contriver finds out through a large amount of practice, carries out follow-up burn operation again after needing strictly to control this index.
And then the phenol water coal slime formed after mixing is burnt in fluidized-bed combustion boiler, the heat energy formed after burning is recycled, in whole treatment process, negative pressure evaporation and middle low-rank coal these two steps dry all need to consume a large amount of high temperature and high pressure steams, just in time the heat energy that burning is formed is returned these two steps to utilize, not only eliminate the extra problem finding other energy to occur, heat energy effectively can also be utilized, improve the added value of phenol-containing wastewater, create certain economic benefit, the flue gas that generally fluidized-bed combustion boiler can be formed during concrete operations to be introduced in boiler-steam dome thus heating steam, and vapor recovery is utilized.If have remaining heat energy also to can be used for living quarters or process unit carries out power generation and heat supply, practicality is very high.The method of this creationary recycling heat energy of the present invention still belongs to pioneering in the art.
Preferably, middle low-rank coal crushing and screening at below 12mm, is preferably 8-10mm to granularity, can improve the homogeneity of the rear phenol water coal slime of mixing like this.
Preferably, middle low-rank coal is preferably dried to water content at below 10wt%, preferred below 5wt%, if the too high effect that can affect burning on the contrary of middle low-rank coal water content.
The embodiment of the present invention, except providing a kind for the treatment of process of phenol-containing wastewater, additionally provides a kind for the treatment of facility of phenol-containing wastewater, comprising: phenol-containing wastewater stores pond, filtering basin, vacuum evaporator, dewatering dryer, mixing tank and fluidized-bed combustion boiler;
The top of described vacuum evaporator is provided with phenol-containing wastewater import, bottom is provided with dense water out, one sidewall of mixing tank is provided with dense water inlet, another sidewall is provided with the outlet of phenol water coal slime, described dense water inlet is connected by pipeline with dense water out, described wastewater inlet is connected with described filtering basin by pipeline, and described filtering basin are stored pond with described phenol-containing wastewater and are connected by pipeline;
The top of mixing tank is provided with middle low-rank coal import for receiving from the dried middle low-rank coal of dewatering dryer, and the sidewall of fluidized-bed combustion boiler is provided with the import of phenol water coal slime, and the import of described phenol water coal slime exports with described phenol water coal slime and is directly connected.
The phenol-containing wastewater treatment facility of the embodiment of the present invention, floor space is little, low cost, match with phenol-containing wastewater treatment process of the present invention, process phenol-containing wastewater ability is strong, can realize phenol-containing wastewater zero release in whole technological process, efficiently solve the problem of phenol water pollutions, all products are all recyclable or directly sold by further separation, and economic benefit is good, is suitable for extensively promoting the use of.
Preferably, vacuum evaporator can for the wherein one in direct contact type vaporizer or indirect contact vaporizer, preferably select indirect contact vaporizer, in indirect contact vaporizer, water vapour walks shell side, phenol-containing wastewater walks tube side, high-temperature high-pressure steam and complete heat exchange containing phenol material in vaporizer, after the phenol-containing wastewater after concentrated, bottom is discharged continuously, and fresh phenol-containing wastewater is added continuously by sidepiece.
Preferably, also crusberscreen is comprised; Enter described crusberscreen after fragmentation in low-rank coal fall into dewatering dryer.
Preferably, also comprise fluidized-bed combustion boiler drum, the top of described boiler-steam dome is provided with vapour outlet, and the top of described vacuum evaporator is provided with the first steam inlet, and described vapour outlet is connected by pipeline with described first steam inlet.
Preferably, the top of described dewatering dryer is provided with the second steam inlet, and described vapour outlet is connected by pipeline with described second steam inlet.Thus realize the recycling of the high temperature and high pressure steam in boiler-steam dome.
Also comprise material conveyer, one end of described upper material conveyer connects the import of described phenol water coal slime, and the other end connects the outlet of described phenol water coal slime.
Preferably, described filtering basin can be the wherein one in sand filter, multi-medium filtering pond.Be preferably sand filter, because sand filter not only effective but also low cost.
Finally, whole phenol-containing wastewater treatment system preferably also comprises flue gas purification system, and described flue gas purification system is for purifying the flue gas cemented out from described boiler-steam dome.
Prior art is compared, and beneficial effect of the present invention is:
(1) embodiments provide a kind for the treatment of process of phenol-containing wastewater, join fine coal after phenol water is concentrated and enter burning in circulating fluid bed boiler, phenol is finally converted into CO
2and H
2o, efficiently solves phenol water pollution problems, and by the heat energy recycle of burning, creates economic benefit;
(2) phenol-containing wastewater is concentrated by negative pressure evaporation, effectively reduce phenol volume of water, the high temperature and high pressure steam that concentrated sewage heat used produces from circular fluid bed, economic and reliable, and the fine coal taken full advantage of in coal mining process, improve the utilization ratio of coal, and provide certain heat after being burned by the organism in phenol-containing wastewater, also reduce the cost that it needs process further;
(3) phenol-containing wastewater treatment facility investment of the present invention is little, floor space is little, working cost is low, slitless connection can be realized with Modern Coal-based Chemical enterprise, by fine coal and concentrated phenol water are mixed into burning in circulating fluid bed boiler, efficiently solve the problem that fine coal heap sum is difficult to utilize on the one hand, efficiently solve phenol-containing wastewater pollution problem on the other hand.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.
Fig. 1 is the treatment facility structure iron of the phenol-containing wastewater of the embodiment of the present invention one;
Fig. 2 is the treatment facility structure iron of the phenol-containing wastewater of the embodiment of the present invention two;
Fig. 3 is the treatment facility structure iron of the phenol-containing wastewater of the embodiment of the present invention three.
Reference numeral:
101-phenol-containing wastewater stores pond; 102-filtering basin;
103-vacuum evaporator; 104-crusberscreen;
105-dewatering dryer; 106-mixing tank;
The upper material conveyer of 107-; 108-fluidized-bed combustion boiler;
109-boiler-steam dome; 110-flue gas purification system.
Embodiment
Below in conjunction with embodiment, embodiment of the present invention are described in detail, but it will be understood to those of skill in the art that the following example only for illustration of the present invention, and should not be considered as limiting the scope of the invention.Unreceipted actual conditions person in embodiment, the condition of conveniently conditioned disjunction manufacturers suggestion is carried out.Agents useful for same or the unreceipted production firm person of instrument, be and can buy by commercially available the conventional products obtained.
Embodiment 1
Accompanying drawing 1 is the treatment facility structure iron of the phenol-containing wastewater of the embodiment of the present invention one, specifically comprises phenol-containing wastewater and stores pond 101, filtering basin 102, vacuum evaporator 103, dewatering dryer 105, mixing tank 106 and fluidized-bed combustion boiler 108; The sidewall of vacuum evaporator 103 is provided with phenol-containing wastewater import, bottom is provided with dense water out, the top of mixing tank 106 is provided with dense water inlet, sidewall is provided with the outlet of phenol water coal slime, dense water inlet is connected by pipeline with dense water out, wastewater inlet is connected with filtering basin by pipeline, and filtering basin and phenol-containing wastewater are stored pond and be connected by pipeline; Another sidewall of mixing tank 106 is provided with middle low-rank coal import for receiving from the dried middle low-rank coal of dewatering dryer 105, middle low-rank coal in dewatering dryer 105 is passed through and is pulverized from crusberscreen 104, the sidewall of fluidized-bed combustion boiler 108 is provided with the import of phenol water coal slime, and the import of phenol water coal slime is exported with phenol water coal slime and is connected by upper material conveyer 107;
The specific works flow process of the phenol-containing wastewater treatment facility of the present embodiment is: first, the phenol-containing wastewater that manufacturing enterprise produces is introduced into phenol-containing wastewater and stores in pond 101, then storing pond 101 from phenol-containing wastewater squeezes into filtering basin 102, the filtering basin of this embodiment are sand filter, in sand filter, the materials such as the particulate matter had in phenol-containing wastewater, tar, dust, lime-ash are effectively removed.The phenol-containing wastewater of the materials such as removing, particulate matter, tar, dust, lime-ash enters in vacuum evaporator 103, in vacuum evaporator 103, phenol-containing wastewater is concentrated, the temperature of operation controls at 70 DEG C, the vacuum evaporator of the present embodiment is indirect contact vaporizer, after phenol-containing wastewater after concentrated, bottom is discharged continuously, and fresh phenol-containing wastewater is added continuously by sidepiece.Meanwhile, first the middle low-rank coal generation woods long-flame coal of the present embodiment is sized to granularity at below 12mm in crusberscreen 104, then in dewatering dryer 105, water content is dried at below 10wt%, then by middle low-rank coal with concentrated after phenol-containing wastewater mix in mixing tank with the mass ratio of 100:10-45, mix and blend rate-controlling is at 600rad/min, mixed phenol-containing wastewater and middle low-rank coal are delivered into fluidized-bed combustion boiler 108 through material loading and burn, and the heat energy that burning is formed is recycled.
Wherein, the ature of coal situation of the present embodiment is as shown in table 1 below, and phenol content do not detected by carrying out detecting in the ash after burning in fluidized-bed combustion boiler, the phenol content in flue gas is 1.93mg/L;
Table 1 coal analysis table
Phenol-containing wastewater by negative pressure evaporation carry out concentrated after front and back change in concentration as shown in table 2 below, the concentrated effect of visible negative pressure evaporation is very good;
Change before and after table 2 phenol water is concentrated
Embodiment 2
Accompanying drawing 2 is the treatment facility structure iron of the phenol-containing wastewater of the embodiment of the present invention two, specifically comprises phenol-containing wastewater and stores pond 101, filtering basin 102, vacuum evaporator 103, dewatering dryer 105, mixing tank 106 and fluidized-bed combustion boiler 108, the sidewall of vacuum evaporator 103 is provided with phenol-containing wastewater import, bottom is provided with dense water out, the top of mixing tank 106 is provided with dense water inlet, sidewall is provided with the outlet of phenol water coal slime, dense water inlet is connected by pipeline with dense water out, wastewater inlet is connected with filtering basin by pipeline, and filtering basin and phenol-containing wastewater are stored pond and be connected by pipeline, another sidewall of mixing tank 106 is provided with middle low-rank coal import for receiving from the dried middle low-rank coal of dewatering dryer 105, middle low-rank coal in dewatering dryer 105 is passed through and is pulverized from crusberscreen 104, the sidewall of fluidized-bed combustion boiler 108 is provided with the import of phenol water coal slime, the import of phenol water coal slime is exported with phenol water coal slime and is connected by upper material conveyer 107, what be connected with fluidized-bed combustion boiler has boiler-steam dome 109, the top of boiler-steam dome 109 is provided with vapour outlet, the top of vacuum evaporator 103 is provided with the first steam inlet, the top of dewatering dryer 105 is provided with the second steam inlet, first steam inlet, second steam inlet is all connected by pipeline with vapour outlet,
The specific works flow process of the phenol-containing wastewater treatment facility of the present embodiment is: first, the phenol-containing wastewater that manufacturing enterprise produces is introduced into phenol-containing wastewater and stores in pond 101, then storing pond 101 from phenol-containing wastewater squeezes into filtering basin 102, the filtering basin of this embodiment are multi-medium filtering pond, in sand filter, the materials such as the particulate matter had in phenol-containing wastewater, tar, dust, lime-ash are effectively removed.The phenol-containing wastewater of the materials such as removing, particulate matter, tar, dust, lime-ash enters in vacuum evaporator 103, in vacuum evaporator 103, phenol-containing wastewater is concentrated, the temperature of operation controls at 80 DEG C, steam needed for vacuum evaporator 103 enters from first steam inlet at top, the vacuum evaporator of the present embodiment is direct contact type vaporizer, after phenol-containing wastewater after concentrated, bottom is discharged continuously, and fresh phenol-containing wastewater is added continuously by sidepiece.Meanwhile, first the middle low-rank coal Tongliao brown coal of the present embodiment are sized to granularity at 8-10mm in crusberscreen 104, then in dewatering dryer 105, water content is dried at below 5wt%, steam needed for dewatering dryer 105 enters from second steam inlet at top, then by middle low-rank coal with concentrated after phenol-containing wastewater mix in mixing tank with the mass ratio of 100:15-30, mix and blend rate-controlling is at 500rad/min, mixed phenol-containing wastewater and middle low-rank coal are delivered into fluidized-bed combustion boiler 108 through material loading and burn, the flue gas that burning is formed enters the steam in boiler-steam dome 109, the water of boiler-steam dome being heated into High Temperature High Pressure and goes out from the vapour outlet at top and recycle, the vacuum evaporator 103 that a part returns enrichment step enters from the first steam inlet, and the dewatering dryer 105 of drying step enters from the second steam inlet and recycles, another part is used for living quarters or process unit power generation and heat supply.Certainly, concentrated link also can adopt the mode of membrane concentration to carry out except adopting vacuum evaporator.
Wherein, the ature of coal situation of the present embodiment is as shown in table 3 below, and phenol content do not detected by carrying out detecting in the ash after burning in fluidized-bed combustion boiler, the phenol content in flue gas is 2.18mg/L;
Table 3 coal analysis table
Phenol-containing wastewater by negative pressure evaporation carry out concentrated after front and back change in concentration as shown in table 4 below, the concentrated effect of visible negative pressure evaporation is very good;
Change before and after table 4 phenol water is concentrated
Embodiment 3
Accompanying drawing 3 is the treatment facility structure iron of the phenol-containing wastewater of the embodiment of the present invention three, specifically comprises phenol-containing wastewater and stores pond 101, filtering basin 102, vacuum evaporator 103, dewatering dryer 105, mixing tank 106 and fluidized-bed combustion boiler 108, the sidewall of vacuum evaporator 103 is provided with phenol-containing wastewater import, bottom is provided with dense water out, the top of mixing tank 106 is provided with dense water inlet, sidewall is provided with the outlet of phenol water coal slime, dense water inlet is connected by pipeline with dense water out, wastewater inlet is connected with filtering basin by pipeline, and filtering basin and phenol-containing wastewater are stored pond and be connected by pipeline, another sidewall of mixing tank 106 is provided with middle low-rank coal import for receiving from the dried middle low-rank coal of dewatering dryer 105, middle low-rank coal in dewatering dryer 105 is passed through and is pulverized from crusberscreen 104, the sidewall of fluidized-bed combustion boiler 108 is provided with the import of phenol water coal slime, the import of phenol water coal slime is exported with phenol water coal slime and is connected by upper material conveyer 107, what be connected with fluidized-bed combustion boiler has boiler-steam dome 109, the top of boiler-steam dome 109 is provided with vapour outlet, the top of vacuum evaporator 103 is provided with the first steam inlet, the top of dewatering dryer 105 is provided with the second steam inlet, first steam inlet, second steam inlet is all connected by pipeline with vapour outlet, last flue gas purification system 110 is for purifying the flue gas cemented out from boiler-steam dome,
The specific works flow process of the phenol-containing wastewater treatment facility of the present embodiment is: first, the phenol-containing wastewater that manufacturing enterprise produces is introduced into phenol-containing wastewater and stores in pond 101, then storing pond 101 from phenol-containing wastewater squeezes into filtering basin 102, the filtering basin of this embodiment are multi-medium filtering pond, in sand filter, the materials such as the particulate matter had in phenol-containing wastewater, tar, dust, lime-ash are effectively removed.The phenol-containing wastewater of the materials such as removing, particulate matter, tar, dust, lime-ash enters in vacuum evaporator 103, in vacuum evaporator 103, phenol-containing wastewater is concentrated, the temperature of operation controls at 80 DEG C, steam needed for vacuum evaporator 103 enters from first steam inlet at top, the vacuum evaporator of the present embodiment is direct contact type vaporizer, after phenol-containing wastewater after concentrated, bottom is discharged continuously, and fresh phenol-containing wastewater is added continuously by sidepiece.Meanwhile, first the middle low-rank coal Tongliao brown coal of the present embodiment are sized to granularity at below 8mm in crusberscreen 104, then in dewatering dryer 105, water content is dried at 9wt%, steam needed for dewatering dryer 105 enters from second steam inlet at top, then by middle low-rank coal with concentrated after phenol-containing wastewater mix in mixing tank with the mass ratio of 100:18, mix and blend rate-controlling is at 550rad/min, mixed phenol-containing wastewater and middle low-rank coal are delivered into fluidized-bed combustion boiler 108 through material loading and burn, fluidized-bed combustion boiler temperature 850 DEG C, the flue gas that burning is formed enters the steam in boiler-steam dome 109, the water of boiler-steam dome being heated into High Temperature High Pressure and goes out from the vapour outlet at top and recycle, a part returns concentrated and drying step and recycles, another part is used for living quarters or process unit power generation and heat supply, flue gas unnecessary in boiler-steam dome purifies rear discharge by flue gas purification system 110.
Wherein, the ature of coal situation of the present embodiment is as shown in the table 3 in embodiment 2, and phenol content do not detected by carrying out detecting in the ash after burning in fluidized-bed combustion boiler, the phenol content in flue gas is 2.18mg/L; Phenol-containing wastewater carries out the front and back change in concentration after concentrating as shown in the table 4 of embodiment 2 by negative pressure evaporation, and the concentrated effect of visible negative pressure evaporation is very good.
The phenol-containing wastewater treatment technology of the embodiment of the present invention, sewage concentration adopts negative pressure evaporation technology, more reliable than membrane separation technique, economy, thickening efficiency are high, and support equipment itself invest little, floor space is little, working cost is low, and Modern Coal-based Chemical enterprise can slitless connection.
Although illustrate and describe the present invention with specific embodiment, however it will be appreciated that can to make when not deviating from the spirit and scope of the present invention many other change and amendment.Therefore, this means to comprise all such changes and modifications belonged in the scope of the invention in the following claims.
Claims (10)
1. a treatment process for phenol-containing wastewater, is characterized in that, comprises the steps:
Phenol-containing wastewater is for subsequent use through filtering, concentrating the dense water of formation, and middle low-rank coal is formed phenol water coal slime with described dense water mixing and stirring after crushing and screening, drying, the mass ratio of wherein said dense water and middle low-rank coal is 10-45:100 simultaneously;
Phenol water coal slime sent in fluidized-bed combustion boiler and burn, the heat energy that burning is formed is recycled.
2. the treatment process of a kind of phenol-containing wastewater according to claim 1, is characterized in that, adopt the mode of evaporating under vacuum conditions to carry out the dense water of concentrated formation, the temperature of operation controls at 70-80 DEG C.
3. the treatment process of a kind of phenol-containing wastewater according to claim 2, is characterized in that, the heat energy part that burning is formed returns concentrated and drying step and recycles, and another part is used for living quarters or process unit power generation and heat supply.
4. the treatment process of a kind of phenol-containing wastewater according to claim 1, is characterized in that, middle low-rank coal crushing and screening to granularity at below 12mm, preferred 8-10mm.
5. the treatment process of a kind of phenol-containing wastewater according to claim 1, is characterized in that, is dried to water content at below 10wt%, preferred below 5wt%.
6. the treatment process of a kind of phenol-containing wastewater according to claim 1, is characterized in that, is filtered into the wherein one in sand filtration, multi-medium filtering and membrane filtration.
7. the treatment process of a kind of phenol-containing wastewater according to claim 1, is characterized in that, the mass ratio of described dense water and middle low-rank coal is 15-30:100, preferred 18:100;
The control of the speed of mix and blend at 500-600rad/min, preferred 550rad/min.
8. described in the disposal methods of any one of claim 1-7, the treatment facility of phenol-containing wastewater, is characterized in that, comprise phenol-containing wastewater and store pond, filtering basin, vacuum evaporator, dewatering dryer, mixing tank and fluidized-bed combustion boiler;
The top of described vacuum evaporator is provided with phenol-containing wastewater import, bottom is provided with dense water out, one sidewall of mixing tank is provided with dense water inlet, another sidewall is provided with the outlet of phenol water coal slime, described dense water inlet is connected by pipeline with dense water out, described wastewater inlet is connected with described filtering basin by pipeline, and described filtering basin are stored pond with described phenol-containing wastewater and are connected by pipeline;
The top of mixing tank is provided with middle low-rank coal import for receiving from the dried middle low-rank coal of dewatering dryer, and the sidewall of fluidized-bed combustion boiler is provided with the import of phenol water coal slime, and the import of described phenol water coal slime exports with described phenol water coal slime and is directly connected.
9. the treatment facility of phenol-containing wastewater according to claim 8, is characterized in that, described vacuum evaporator is wherein a kind of in direct contact type vaporizer or indirect contact vaporizer.
10. the treatment facility of phenol-containing wastewater according to claim 8, is characterized in that, also comprises crusberscreen; Enter described crusberscreen after fragmentation in low-rank coal fall into dewatering dryer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511017466.3A CN105439359A (en) | 2015-12-29 | 2015-12-29 | Phenol-containing sewage treatment method and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511017466.3A CN105439359A (en) | 2015-12-29 | 2015-12-29 | Phenol-containing sewage treatment method and equipment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824396A (en) * | 1981-08-03 | 1983-02-14 | Nippon Steel Corp | Aerobic activated sludge treatment for waste water produced from installation relating to coke factory |
| CN103172133A (en) * | 2013-04-08 | 2013-06-26 | 北京华泰焦化工程技术有限公司 | Coking wastewater treatment method and system |
| CN205387519U (en) * | 2015-12-29 | 2016-07-20 | 北京华福工程有限公司 | Treatment facility that contains phenol sewage |
-
2015
- 2015-12-29 CN CN201511017466.3A patent/CN105439359A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824396A (en) * | 1981-08-03 | 1983-02-14 | Nippon Steel Corp | Aerobic activated sludge treatment for waste water produced from installation relating to coke factory |
| CN103172133A (en) * | 2013-04-08 | 2013-06-26 | 北京华泰焦化工程技术有限公司 | Coking wastewater treatment method and system |
| CN205387519U (en) * | 2015-12-29 | 2016-07-20 | 北京华福工程有限公司 | Treatment facility that contains phenol sewage |
Non-Patent Citations (1)
| Title |
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| 吴勃等: "酚水煤泥法处理高浓度含酚废水", 《哈尔滨理工大学学报》 * |
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Application publication date: 20160330 |