CN101920255A - Method for treating persistent organic pollutants - Google Patents
Method for treating persistent organic pollutants Download PDFInfo
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- CN101920255A CN101920255A CN2009100529724A CN200910052972A CN101920255A CN 101920255 A CN101920255 A CN 101920255A CN 2009100529724 A CN2009100529724 A CN 2009100529724A CN 200910052972 A CN200910052972 A CN 200910052972A CN 101920255 A CN101920255 A CN 101920255A
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Abstract
The invention discloses a method for treating persistent organic pollutants (POPs). In the method, after liquid or powder POPs are mixed with conventional processing raw materials of a high-temperature liquid slagging gasifier, the mixture is treated by adopting the high-temperature liquid slagging gasifier. The method realizes the best combination of harmless treatment and resource utilization of the POPs under the condition of not changing process conditions of the gasifier fundamentally, and provides a novel green technical approach for treating the POPs.
Description
Technical field
The invention belongs to environmental protection and persistence toxic pollutant processing technology field, specifically, is the processing method about a kind of persistence organic pollutant.
Background technology
In recent decades, whole world process of industrialization fast development, when bringing material progress to human society, make a large amount of harmful wastes be discharged in the environment, particularly (Persistent Organic Pollutants POPs) becomes a pollutant that human survival is threatened maximum to persistence organic pollutant.Studies show that POPs can cause human endocrine system disorders, reproduction and immune system to destroy, brings out cancer, causes deformity, gene mutation and the nervous system disease etc., and in human body, be detained number generation, procreation of serious threat human survival and sustainable development.
Persistence organic pollutants such as POPs have the history of a large amount of productions and use in China.The sixties in 20th century, that China produces use in a large number mainly was organo-chlorine pesticide class POPs, accounts for the over half of agricultural chemicals use amount to the beginning of the eighties.China in 1970 uses 19.17 ten thousand tons of organochlorine insecticideses such as BHC, DDT, toxaphene altogether according to statistics, accounts for 80.01% of the total consumption of agricultural chemicals then.Over 30 years, China's accumulative total is used about more than 40 ten thousand tons of DDT, accounts for 20% of world's total amount.The Polychlorinated biphenyls total output that China produces is approximately 10
4Ton, as the impregnating agent of power capacitor, small part is as oil paint additive mostly.Last century the seventies China also import contain the transformer of Polychlorinated biphenyls in a large number.It is investigated that the content of Polychlorinated biphenyls in the impregnating agent of waste and old capacitor (PCBs) is greater than 90%, and the content of PCBs is greater than 50% in the transformer oil of discarded transformers imported, these capacitors and transformer have been scrapped mostly and have been sealed up for safekeeping at present.Dioxin and furans produce in chlorine-bearing compound heating and burning process, as chlor-alkali, papermaking, metal smelt, organic chemical industry, vehicle exhaust and waste incineration process.POPs has characteristics such as high toxicity, biological accumulation, and China is being faced with the severe situation that relevant POPs pollutes.
At the disposal of POPs refuse, the domestic industry application has preferably:
The security landfill method: it is a kind of strategy of temporary transient, delay, and environmental risk is bigger, and can not fundamentally eliminate persistence organic pollutant such as POPs, only pollutant is once shifted, and floor space is big; But totle drilling cost, gross investment are lower with respect to other technology.In the human body removing of harmful insecticide POPs material especially, it still is feasible adopting this method to some.
The high temperature incineration technology: high temperature incineration is to utilize the at high temperature labile characteristic of organic matter, at high temperature burns to reach and removes the purpose of polluting.It is applicable to the persistent organism of handling a large amount of high concentrations, but the equipment construction expense is higher, and the easy dioxin that produces causes secondary pollution in burning.
Technology is put in the cement kiln coexistence: the cement kiln method is disposed low concentration PCBs pollutant and is better than the high density pollution thing, its volume is big, high temperature, Heat stability is good, investment are less, alternative again part of fuel is a kind of processing mode that present harmless treatment and comprehensive utilization of resources combine.But operation stability is the poorest when disposing high concentration PCBs pollutant, and simultaneously, The experimental results shows, if chloride ion content is too high, chlorion causes skinning obstruction in the kiln at the cement kiln circulating enrichment, can cause and stop kiln, reduce cement output, influence ordinary production; If enterprise in strict accordance with the operational procedure operation, the imperfect combustion phenomenon may not take place, thereby give off poisonous and hazardous combustion product on the other hand, cause secondary pollution.
High-temperature liquid state deslagging gasification furnace belongs to chemical field, generally be used for carbon one chemical products and IGCC combined cycle generations such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol now, its technical process is: raw material dry coal powder (or the slurry that mixes of the mixture formed of petroleum coke powder, dry coal powder and petroleum coke powder, coal slurry, petroleum charred slurry, coal and petroleum coke composition) is transported to the burner of gasification furnace, then under the gasification furnace high-temperature and high-pressure conditions and O
2, steam or CO
2Various conversion reactions take place.By the control feeding quantity, regulate oxygen amount, quantity of steam or CO
2Amount moves gasification furnace, gasification furnace operating pressure 0.1～9.5MPa in 1200～2000 ℃ of scopes.The synthesis gas that reaction generates is (with CO+H
2Be main) can be used for chemical products and IGCC combined cycle generations such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol after purifying.At the bottom of inertia vitreum that Quench forms or slag are by gasification furnace, discharge, can make construction material, roadbed material and cement material etc.
Summary of the invention
The present inventor finds through long-term cross-cutting research back, use existing high-temperature liquid state deslagging gasification furnace in the chemical industry extensive use, can be under the condition that does not change existing technology substantially, handle persistence organic pollutant effectively, thereby solve the hang-up in the persistence organic pollutant processing.
Therefore, primary and foremost purpose of the present invention just is to provide a kind of novel persistence organic pollutant processing method.
The processing method of persistence organic pollutant of the present invention (POPs) be with the persistence organic pollutant of liquid state or powdery with after the conventional treatment raw material of high-temperature liquid state deslagging gasification furnace mixes, adopt high-temperature liquid state deslagging gasification furnace to handle.
According to the present invention, the persistence organic pollutant of liquid state or powdery is by pyrolysis, the freezing or directly broken acquisition of disintegrating machine.
According to the present invention, the mixed proportion of the conventional treatment raw material of persistence organic pollutant and high-temperature liquid state deslagging gasification furnace should satisfy: the corresponding slag melt-flow of blend temperature is within the gasification furnace operating temperature range.
According to the present invention, the conventional treatment raw material of high-temperature liquid state deslagging gasification furnace comprises: dry coal powder, petroleum coke powder, dry coal powder and mixture, coal slurry, petroleum charred slurry or the coal of petroleum coke powder and the slurry that mixes of petroleum coke.
According to the present invention, high-temperature liquid state deslagging gasification furnace handle be make persistence organic pollutant and high-temperature liquid state deslagging gasification furnace the blend of conventional treatment raw material in gasification furnace and O
2, steam or CO
2Various conversion reactions take place.
According to the present invention, the weight ratio of the mixture of persistence organic pollutant and dry coal powder, petroleum coke powder or dry coal powder and petroleum coke powder is 0.0001: 100～50: 100 in the blend.
According to the present invention, persistence organic pollutant and coal slurry, petroleum charred slurry or coal are 0.0001: 154～50: 154 with the weight ratio of mixing slurry of petroleum coke in the blend.
According to the present invention, the conversion reaction in the gasification furnace is carried out under HTHP; Wherein, high temperature is meant that temperature is at 1200～2000 ℃; High pressure is meant that pressure is at 0.1～9.5MPa.
Another aspect of the present invention provides the application that a kind of high-temperature liquid state deslagging gasification furnace is used to handle persistence organic pollutant.
Compare with existing persistence organic pollutant processing method, processing method of the present invention has the following advantages:
1, appointed condition maturation of the present invention, operation is continuous, and disposal ability is big, thereby disposal cost is reduced greatly;
2, the present invention is applicable to and handles all kinds of persistence organic pollutants, specifically, its concentration height and have the difference of form no matter, as long as satisfy gasification furnace charging requirement, persistence organic pollutant all can be by gasification process;
3, the present invention is the optimum composition method of harmless treatment and recycling persistence organic pollutant, and persistence organic pollutant is reduced to CO and H by high-temperature gasification together with coal or petroleum coke
2It is main synthesis gas, after purifying, can be used for carbon one chemical products and IGCC combined cycle generations such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol, vitreum or the slag that discharge the gasification furnace bottom can be used as construction material, roadbed material and cement material, and good economic benefits is arranged;
4, ecological environment benefit of the present invention is good: sewage quantity is little and do not contain tar, phenol etc., can realize qualified discharge by simple process; Reducing atmosphere, the secondary pollution of having avoided formation such as dioxin to cause, and whole system non-exhaust emission almost; The slag carbon containing that furnace bottom is discharged is low, non-secondary pollution.
Description of drawings
Fig. 1 is the process chart of existing high-temperature liquid state deslagging gasification furnace.
Fig. 2 is the flow chart that employing high-temperature liquid state deslagging gasification furnace of the present invention is handled persistence organic pollutant.
The specific embodiment
Below in conjunction with specific embodiment, the invention will be further described.Should be understood that following examples only are used to the present invention is described but not are used to limit scope of the present invention.
As shown in Figure 1, for having the process chart of high-temperature liquid state deslagging gasification furnace now.As shown in the figure, raw material (mixture formed of dry coal powder, petroleum coke powder, dry coal powder and petroleum coke powder, coal slurry, petroleum charred slurry, coal and petroleum coke form mix slurry) is transported to the burner of gasification furnace (mixture of dry coal powder, petroleum coke powder, dry coal powder and petroleum coke powder composition passes through high pressure N
2Or CO
2Carry, coal slurry, petroleum charred slurry, coal and petroleum coke is formed mixes slurry then by the high-pressure pump conveying), then in gasification furnace under high-temperature and high-pressure conditions and O
2, steam or CO
2Various conversion reactions take place, and reacted synthesis gas is (with CO+H
2Be main) after purifying, can be used for carbon one chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc.And the high temperature furnace slag that discharge the gasification furnace bottom forms the vitreum or the slag of non-secondary pollution after Quench, can be used as construction material, roadbed material or cement material.
As shown in Figure 2, handle the process chart of persistence organic pollutant (POPs) for employing high-temperature liquid state deslagging gasification furnace of the present invention.The present invention adopts the technology of existing high-temperature liquid state deslagging gasification furnace, promptly under the situation of the process conditions that do not change existing gasification furnace substantially, with after the persistence organic pollutant preliminary treatment with conventional treatment raw material (the dry coal powder of high-temperature liquid state deslagging gasification furnace, petroleum coke powder, the mixture that dry coal powder and petroleum coke powder are formed, coal slurry, petroleum charred slurry, coal and petroleum coke are formed mixes slurry) mixing (the slag melt-flow temperature that preferably makes blend is in the routine operation temperature range of gasification furnace) in the proper ratio, utilize existing high-temperature liquid state deslagging gasification furnace then, make persistence organic pollutant with the conventional treatment raw material of high-temperature liquid state deslagging gasification furnace in gasification furnace and O
2, steam or CO
2Various conversion reactions take place to be generated with H
2With CO be main synthesis gas.Because persistence organic pollutant chlorinty such as POPs are higher, under reducing atmosphere, can cause in the synthesis gas HCl content higher, so adding a HCl again after existing purified synthesis gas workshop section, the present invention removes workshop section's (i.e. HCl absorber that soda lye is housed, carry out neutralization reaction and remove HCl), further purify synthesis gas, thus thoroughly innoxious, recycling treatment persistence organic pollutant.
In conjunction with the present invention, " harmless treatment " that context is mentioned is meant under HTHP and reducing atmosphere, by the characteristics of the chemical reaction that carries out in the high-temperature gasification stove, persistence organic pollutant is converted into CO, H
2, little molecular product such as HCl, avoided the secondary pollutions that generation caused such as dioxin, thereby realized thoroughly innoxious technical process of persistence organic pollutant.
According to the present invention, the synthesis gas after the gasification furnace high-temperature process is with H
2With CO be main, in the synthesis gas that the gasification furnace of the mixture charging that dry coal powder, petroleum coke powder or dry coal powder and petroleum coke powder are formed makes, CO+H
2Content reach about 90%, mix in the synthesis gas that the gasification furnace of starching charging makes CO+H and coal slurry, petroleum charred slurry or coal and petroleum coke are formed
2Content reach about 80%.
Synthesis gas can be used for carbon one chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc. after purifying.And the high temperature furnace slag that discharge the gasification furnace bottom can form the vitreum or the slag of non-secondary pollution after Quench, can be used as construction material, roadbed material or cement material.
In following embodiment of the present invention, " preliminary treatment " refers to methods such as adopting pyrolysis, the freezing or direct fragmentation of disintegrating machine to persistence organic pollutant, cross container, the POPs residual concentration soil with high of POPs and contain dioxin or the solid waste of furans etc. carries out preliminary treatment as organic chloro pesticide and PCBs oil, the waste and old power capacitor that contains PCBs and transformer, splendid attire, thereby make pending persistence organic pollutant become the persistence organic pollutant of liquefiable or efflorescence; Those skilled in the art will readily understand,, then do not need to carry out above-mentioned preliminary treatment, but directly handle if when pending persistence organic pollutant itself is the persistence organic pollutant of liquid state or powdery.
Embodiment 1
The waste and old power capacitor that contains PCBs makes it meet the gasification furnace charging through certain preliminary treatment.
The powder that processing is obtained mixes with an amount of ratio with qualified dry coal powder, make the corresponding slag melt-flow of blend temperature within the gasification furnace operating temperature range, in the present embodiment, containing the powder of PCBs and the weight ratio of dry coal powder is 0.0001: 100, and the slag melt temperature of mixing the back blend is about 1430 ℃.
Blend with high pressure N2 as pumped (conveying) medium in gasifier nozzle is delivered to gasification furnace, under 1550 ℃, the condition of 2.5MPa, with the O that enters by another road of burner in the gasification furnace
2With the various conversion reactions of steam generation.Reacted synthesis gas is discharged by gasification furnace top, and high temperature furnace slag is then discharged by the gasification furnace bottom.
After measured, reacted synthesis gas is with H
2With CO be main, account for 90%, the degradation rate of PCBs reaches 99.9999%, purifies the content＜0.002ng-TEQ/Nm of dioxin in the synthesis gas of back
3Slag is fusion at high temperature, forms the vitreum of non-secondary pollution.
These high-temperature synthesis gas by gas washing dedusting and further cooling, make dustiness less than 1mg/m after Quench, radiant boiler and convection boiler indirect heat exchange reclaim heat (pot destroying process)
3
Then, the synthesis gas of preliminary purification is fed the HCl absorber that soda lye is housed, remove the HCl in the synthesis gas, the synthesis gas after the purification is admitted to subsequent handling (being used for chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc.).
Embodiment 2
Hexachloro-benzene (HCB) residual concentration soil with high makes it meet the gasification furnace charging through certain preliminary treatment.
Soil after handling is mixed with an amount of ratio with qualified dry coal powder, make the corresponding slag melt-flow of blend temperature within the gasification furnace operating temperature range, in the present embodiment, containing the soil of HCB and the weight ratio of dry coal powder is 25: 100, and the slag melt temperature of mixing the back blend is about 1410 ℃.
Blend is with high pressure CO
2As pumped (conveying) medium in gasifier nozzle is delivered to gasification furnace, under 1500 ℃, the condition of 3.0MPa, with the O that enters by another road of burner in the gasification furnace
2With the various conversion reactions of steam generation.Reacted synthesis gas is discharged by gasification furnace top, and high temperature furnace slag is then discharged by the gasification furnace bottom.
After measured, reacted synthesis gas is with H
2With CO be main, account for 88%, the degradation rate of HCB reaches 99.9999%, purifies the content＜0.002ng-TEQ/Nm of dioxin in the synthesis gas of back
3Slag is fusion at high temperature, forms the vitreum of non-secondary pollution.
These high-temperature synthesis gas by gas washing dedusting and further cooling, make dustiness less than 1mg/m after Quench, radiant boiler and convection boiler indirect heat exchange reclaim heat (pot destroying process)
3
Then, the synthesis gas of preliminary purification is fed the HCl absorber that soda lye is housed, remove the HCl in the synthesis gas, the synthesis gas after the purification is admitted to subsequent handling (being used for chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc.).
Embodiment 3
The waste and old transformer that contains PCBs makes it meet the gasification furnace charging through certain preliminary treatment.
Processing is obtained powder to be mixed with an amount of ratio with qualified dry coal powder, make the corresponding slag melt-flow of blend temperature within the gasification furnace operating temperature range, in the present embodiment, containing the powder of PCBs and the weight ratio of dry coal powder is 50: 100, and the slag melt temperature of mixing the back blend is about 1450 ℃.
Blend is with high pressure CO
2As pumped (conveying) medium in gasifier nozzle is delivered to gasification furnace, under 1550 ℃, the condition of 2.5MPa, with the O that enters by another road of burner in the gasification furnace
2With the various conversion reactions of steam generation.Reacted synthesis gas is discharged by gasification furnace top, and high temperature furnace slag is then discharged by the gasification furnace bottom.
After measured, reacted synthesis gas is with H
2With CO be main, account for 89%, the degradation rate of PCBs reaches 99.9999%, purifies the content＜0.002ng-TEQ/Nm of dioxin in the synthesis gas of back
3Slag is fusion at high temperature, forms the vitreum of non-secondary pollution.
These high-temperature synthesis gas by gas washing dedusting and further cooling, make dustiness less than 1mg/m after Quench, radiant boiler and convection boiler indirect heat exchange reclaim heat (pot destroying process)
3
Then, the synthesis gas of preliminary purification is fed the HCl absorber that soda lye is housed, remove the HCl in the synthesis gas, the synthesis gas after the purification is admitted to subsequent handling (being used for chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc.).
Embodiment 4
The paint that contains PCBs makes it meet the gasification furnace charging through certain preliminary treatment.
Paint after handling is mixed with an amount of ratio with qualified coal slurry, make the corresponding slag melt-flow of blend temperature within the gasification furnace operating temperature range, in the present embodiment, the weight ratio of described paint and coal slurry is 0.0001: 154, and the slag melt temperature of mixing the back blend is about 1250 ℃.
Blend adopts high-pressure pump in gasifier nozzle is delivered to gasification furnace, under 1350 ℃, the condition of 4.5MPa, with the O that enters by another road of burner in the gasification furnace
2Various conversion reactions take place.Reacted synthesis gas is discharged by the gasification furnace bottom, and high temperature furnace slag is then discharged by the gasification furnace bottom.
After measured, reacted synthesis gas is with H
2With CO be main, account for 79%, the degradation rate of PCBs reaches 99.9999%, purifies the content＜0.002ng-TEQ/Nm of dioxin in the synthesis gas of back
3Slag is fusion at high temperature, forms the slag of non-secondary pollution.
These high-temperature synthesis gas are through radiant boiler and directly after the cooling (chilling process), by gas washing dedusting and further cooling, make dustiness less than 1mg/m in water
3
Then, the synthesis gas of preliminary purification is fed the HCl absorber that soda lye is housed, remove the HCl in the synthesis gas, the synthesis gas after the purification is admitted to subsequent handling (being used for chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc.).
Embodiment 5
Organo-chlorine pesticide DDT makes it meet the gasification furnace charging through certain preliminary treatment.
DDT after handling is mixed with an amount of ratio with qualified coal slurry, make the corresponding slag melt-flow of blend temperature within the gasification furnace operating temperature range, in the present embodiment, the weight ratio of organo-chlorine pesticide DDT and coal slurry is 25: 154, and the slag melt temperature of mixing the back blend is about 1220 ℃.
Blend adopts high-pressure pump in gasifier nozzle is delivered to gasification furnace, under 1300 ℃, the condition of 6.0MPa, with the O that enters by another pipeline in the gasification furnace
2Various conversion reactions take place.Reacted synthesis gas is discharged by the gasification furnace bottom, and high temperature furnace slag is then discharged by the gasification furnace bottom.
After measured, reacted synthesis gas is with H
2With CO be main, account for 79%, the degradation rate of DDT reaches 99.9999%, purifies the content＜0.002ng-TEQ/Nm of dioxin in the synthesis gas of back
3Slag is fusion at high temperature, forms the slag of non-secondary pollution.
These high-temperature synthesis gas are through radiant boiler and directly after the cooling (chilling process), by gas washing dedusting and further cooling, make dustiness less than 1mg/m in water
3
Then, the synthesis gas of preliminary purification is fed the HCl absorber that soda lye is housed, remove the HCl in the synthesis gas, the synthesis gas after the purification is admitted to subsequent handling (being used for chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc.).
Embodiment 6
PCBs oil makes it meet the gasification furnace charging through certain preliminary treatment.
The oily and qualified coal slurry of PCBs after handling is mixed with an amount of ratio, make the corresponding slag melt-flow of blend temperature within the gasification furnace operating temperature range, in the present embodiment, described PCBs oil is 50: 154 with the weight ratio of coal slurry, and the slag melt temperature of mixing the back blend is about 1300 ℃.
Blend adopts high-pressure pump in gasifier nozzle is delivered to gasification furnace, under 1400 ℃, the condition of 4.5MPa, with the O that enters by another pipeline in the gasification furnace
2Various conversion reactions take place.Reacted synthesis gas is discharged by the gasification furnace bottom, and high temperature furnace slag is then discharged by the gasification furnace bottom.
After measured, reacted synthesis gas is with H
2With CO be main, account for 80%, the degradation rate of PCBs reaches 99.9999%, purifies the content＜0.002ng-TEQ/Nm of dioxin in the synthesis gas of back
3Slag is fusion at high temperature, forms the slag of non-secondary pollution.
These high-temperature synthesis gas are through radiant boiler and directly after the cooling (chilling process), by gas washing dedusting and further cooling, make dustiness less than 1mg/m in water
3
Then, the synthesis gas of preliminary purification is fed the HCl absorber that soda lye is housed, remove the HCl in the synthesis gas, the synthesis gas after the purification is admitted to subsequent handling (being used for chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc.).
Embodiment 7
The waste and old power capacitor that contains PCBs makes it meet the gasification furnace charging through certain preliminary treatment.
Processing is obtained powder to be mixed with an amount of ratio with qualified coal dust and petroleum coke powder, make the corresponding slag melt-flow of blend temperature within the gasification furnace operating temperature range, in the present embodiment, the weight ratio of the powder of the described PCBs of containing and petroleum coke powder, coal dust is 10: 20: 100, and the slag melt temperature of mixing the back blend is about 1450 ℃.
Blend is with high pressure N
2As pumped (conveying) medium in gasifier nozzle is delivered to gasification furnace, under 1550 ℃, the condition of 2.5MPa, with the O that enters by another road of burner in the gasification furnace
2With the various conversion reactions of steam generation.Reacted synthesis gas is discharged by gasification furnace top, and high temperature furnace slag is then discharged by the gasification furnace bottom.
After measured, reacted synthesis gas is with H
2With CO be main, account for 90%, the degradation rate of PCBs reaches 99.9999%, purifies the content＜0.002ng-TEQ/Nm of dioxin in the synthesis gas of back
3Slag is fusion at high temperature, forms the vitreum of non-secondary pollution.
These high-temperature synthesis gas by gas washing dedusting and further cooling, make dustiness less than 1mg/m after Quench, radiant boiler and convection boiler indirect heat exchange reclaim heat (pot destroying process) then
3
Then, the synthesis gas of preliminary purification is fed the HCl absorber that soda lye is housed, remove the HCl in the synthesis gas, the synthesis gas after the purification is admitted to subsequent handling (being used for chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc.).
Embodiment 8
PCBs oil makes it meet the gasification furnace charging through certain preliminary treatment.
Oily and qualified coal slurry and the petroleum charred slurry of PCBs after handling mixed with an amount of ratio, make the corresponding slag melt-flow of blend temperature within the gasification furnace operating temperature range, in the present embodiment, described PCBs oil is 20: 20: 154 with the weight ratio of petroleum charred slurry, coal slurry, and the slag melt temperature of mixing the back blend is about 1270 ℃.
Blend adopts high-pressure pump in gasifier nozzle is delivered to gasification furnace, under 1350 ℃, the condition of 5.0MPa, with the O that enters by another pipeline in the gasification furnace
2Various conversion reactions take place.Reacted synthesis gas is discharged by the gasification furnace bottom, and high temperature furnace slag is then discharged by the gasification furnace bottom.
After measured, reacted synthesis gas is with H
2With CO be main, account for 80%, the degradation rate of PCBs reaches 99.9999%, purifies the content＜0.002ng-TEQ/Nm of dioxin in the synthesis gas of back
3Slag is fusion at high temperature, forms the slag of non-secondary pollution.
These high-temperature synthesis gas are through radiant boiler and directly after the cooling (chilling process), by gas washing dedusting and further cooling, make dustiness less than 1mg/m in water
3
Then, the synthesis gas of preliminary purification is fed the HCl absorber that soda lye is housed, remove the HCl in the synthesis gas, the synthesis gas after the purification is admitted to subsequent handling (being used for chemical products such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol and IGCC combined cycle generation etc.).
The present invention is a treatment facility with existing high-temperature liquid state deslagging gasification furnace, by with after the conventional treatment raw material of persistence organic pollutant (POPs) and high-temperature liquid state deslagging gasification furnace (mixture formed of dry coal powder, petroleum coke powder, dry coal powder and petroleum coke powder, coal slurry, petroleum charred slurry, coal and petroleum coke form the mix slurry) mixing, under the situation of the process conditions that do not change gasification furnace substantially, with persistence organic pollutant harmless treatment up hill and dale, solved a hang-up during persistence organic pollutant (POPs) is handled.
Utilize gasification furnace to handle persistence organic pollutant in China its special advantages is arranged.The quantity of the high-temperature liquid state deslagging gasification furnace of China various places use at present is more, the processing of persistence organic pollutant (POPs) does not change the process conditions of existing high-temperature liquid state deslagging gasification furnace substantially in addition, therefore have advantages such as appointed condition maturation, operation is continuous, disposal ability is big, with low cost, meet very much the national conditions of China.
Method of the present invention is not subjected to the influence of persistence organic pollutant kind and concentration height, and ecological environment benefit is good.In addition, persistence organic pollutant is handled through gasification furnace, the synthesis gas that generates can be used for C-1 chemistry product such as hydrogen manufacturing, synthetic ammonia and production methyl alcohol according to existing mode, and IGCC combined cycle generation, and vitreum that forms after the Quench or slag can be used as construction material, roadbed material or cement material etc., and good economic benefits is arranged.The present invention has realized the best of breed of harmless treatment and recycling persistence organic pollutant, for the persistence organic pollutant (POPs) of China is provided by the novel green technology approach that provides.
Claims (10)
1. the processing method of a persistence organic pollutant is characterized in that: described method be with the persistence organic pollutant of liquid state or powdery with after the conventional treatment raw material of high-temperature liquid state deslagging gasification furnace mixes, adopt high-temperature liquid state deslagging gasification furnace to handle.
2. the method for claim 1 is characterized in that: the persistence organic pollutant of described liquid state or powdery is by pyrolysis, freezing or disintegrating machine is directly broken obtains.
3. the method for claim 1 is characterized in that: the mixed proportion of the conventional treatment raw material of described persistence organic pollutant and high-temperature liquid state deslagging gasification furnace satisfies: the corresponding slag melt-flow of blend temperature is within the gasification furnace operating temperature range.
4. the method for claim 1, it is characterized in that: the conventional treatment raw material of high-temperature liquid state deslagging gasification furnace comprises: dry coal powder, petroleum coke powder, dry coal powder and mixture, coal slurry, petroleum charred slurry or the coal of petroleum coke powder and the slurry that mixes of petroleum coke.
5. method as claimed in claim 4 is characterized in that: the weight ratio of the mixture of persistence organic pollutant and dry coal powder, petroleum coke powder or dry coal powder and petroleum coke powder is 0.0001: 100～50: 100 in the described blend.
6. method as claimed in claim 4 is characterized in that: persistence organic pollutant and coal slurry, petroleum charred slurry or coal are 0.0001: 154～50: 154 with the weight ratio of mixing slurry of petroleum coke in the described blend.
7. the method for claim 1 is characterized in that: described high-temperature liquid state deslagging gasification furnace handle be make persistence organic pollutant and high-temperature liquid state deslagging gasification furnace the blend of conventional treatment raw material in gasification furnace and O
2, steam or CO
2Various conversion reactions take place.
8. method as claimed in claim 7 is characterized in that: described reaction is to carry out under HTHP.
9. method as claimed in claim 8 is characterized in that: described high temperature is meant temperature at 1200～2000 ℃, and described high pressure is meant that pressure is at 0.1～9.5MPa.
10. the application of a high-temperature liquid state deslagging gasification furnace is characterized in that: be used for the harmless treatment persistence organic pollutant.
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| CN111534355A (en) * | 2020-04-01 | 2020-08-14 | 绍兴凤登环保有限公司 | Fluxing agent for reducing coal ash melting point |
Citations (4)
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| CN201195718Y (en) * | 2008-03-26 | 2009-02-18 | 华东理工大学 | Novel gasification furnace propitious to recycle heat |
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| US4422940A (en) * | 1982-05-17 | 1983-12-27 | Bofors Nobel, Incorporated | Method of neutralizing and detoxifying wastes containing organic compounds |
| US5347068A (en) * | 1991-08-01 | 1994-09-13 | Energiewerke Schwarze Pumpe Aktiengesellschaft | Method of simultaneous disposal of solid and liquid wastes |
| CN201195718Y (en) * | 2008-03-26 | 2009-02-18 | 华东理工大学 | Novel gasification furnace propitious to recycle heat |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111534355A (en) * | 2020-04-01 | 2020-08-14 | 绍兴凤登环保有限公司 | Fluxing agent for reducing coal ash melting point |
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Application publication date: 20101222 |