CN210855751U - Sludge chemical chain gasification system based on steel slag oxygen carrier - Google Patents
Sludge chemical chain gasification system based on steel slag oxygen carrier Download PDFInfo
- Publication number
- CN210855751U CN210855751U CN201921102356.0U CN201921102356U CN210855751U CN 210855751 U CN210855751 U CN 210855751U CN 201921102356 U CN201921102356 U CN 201921102356U CN 210855751 U CN210855751 U CN 210855751U
- Authority
- CN
- China
- Prior art keywords
- sludge
- fluidized bed
- steel slag
- slag
- mud
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002893 slag Substances 0.000 title claims abstract description 80
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 70
- 239000010959 steel Substances 0.000 title claims abstract description 70
- 239000010802 sludge Substances 0.000 title claims abstract description 67
- 238000002309 gasification Methods 0.000 title claims abstract description 48
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 44
- 239000001301 oxygen Substances 0.000 title claims abstract description 44
- 239000000126 substance Substances 0.000 title claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 19
- 238000005516 engineering process Methods 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 7
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 14
- 239000000446 fuel Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 238000005299 abrasion Methods 0.000 description 7
- 239000000969 carrier Substances 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 229910001341 Crude steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 244000052769 pathogen Species 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000008247 solid mixture Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052923 celestite Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Images
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The utility model discloses a mud chemical chain gasification system based on slag oxygen carrier, including combustible gas collection device, filter equipment, main cyclone, mainstream fluidized bed, mill, air-blower, vice bed cyclone, side fluidized bed and ash bucket, compare with prior art, the utility model discloses use present municipal sludge and the iron and steel industry slag intractable actual problem as the starting point, based on the theory based on "treat useless with the other wastes", developed the mud chemical chain gasification technique based on slag oxygen carrier, help realizing the volume reduction decrement of mud and slag through this research, can also retrieve the calorific value in the mud simultaneously, realize the energy utilization of mud. Compared with the prior sludge treatment technology, the utility model can obviously reduce the operation cost, reduce the pollutant emission in the production process and has better social, economic and environmental protection benefits.
Description
Technical Field
The utility model relates to the technical field of environmental protection, especially, relate to a mud chemical chain gasification system based on slag oxygen carrier.
Background
Sludge is a viscous flocculating constituent settled in the sewage treatment process, contains a large amount of heavy metals, worm eggs, pathogens and organic pollutants, and has serious harm to the environment. At present, the treatment means of sludge in China is mainly landfill, but with the continuous development of economy and the promotion of urbanization construction in China, the sludge yield is increased day by day, and the landfill treatment of sludge faces various problems of limited landfill space, difficult landfill utilization, secondary pollution of leachate and the like. The sludge contains a large amount of organic matters and combustible components, so that the dry-based heat value is high, and the sludge has the value of being developed and utilized by energy. Sludge has been defined as a resource by some developed countries abroad, and the energy utilization of sludge is encouraged through technical development and policy support. In recent years, China also develops a series of related policies in the aspect of sludge treatment and disposal, and the treatment and disposal of sludge are encouraged to follow the principle of 'reduction, stabilization, harmlessness and reclamation'. The national energy agency proposes in 2017 that 'areas mainly based on landfill sites are selected preferentially to generate a cogeneration coal-electric machine set, and lay out technical improvement projects of coupling garbage and sludge power generation by burning coal, with the emphasis on 36 key cities such as direct prefectures, provincial cities, planned single-row cities and the like, large garbage and sludge generation amount and difficult land utilization or limited space', and 42 demonstration projects of coupling sludge power generation are approved for the first time. Therefore, the energy utilization of the sludge is carried out, the outlet problem of the sludge can be solved, the environmental pressure is relieved, the heat value in the sludge can be recycled, and the method has great practical significance.
Chemical Looping Gasification (CLG) is used as a novel gasification mode, lattice oxygen in an oxygen carrier is used for replacing a gasification medium in a conventional gasification reaction, oxygen elements required by the gasification reaction are provided for fuel, pollution can be further reduced, separation and capture of CO2 are facilitated, and the utilization rate of energy is improved. In recent years, researchers have proposed the utilization of sludge energy by chemical-looping gasification. The chemical chain gasification technology of the sludge mainly shows the following advantages: the method can further reduce the emission of harmful substances, effectively reduce the content of tar of gasification products and improve the gasification reaction activity and carbon conversion rate under the condition of inheriting the traditional gasification advantages of the sludge; oxygen carriers are circulated in the chemical chain gasification process to provide oxygen required by sludge gasification, so that the problem of high process cost is solved; the heat released during the oxidation regeneration of the oxygen carrier is carried by the oxygen carrier to provide heat for the gasification of the sludge, so that the gradient utilization of chemical energy is realized; the chemical chain gasification of the sludge can treat the sludge on a larger scale, effectively destroy pathogens, and has obvious volume reduction effect and more obvious environmental benefit. In addition, by carrying out appropriate modification treatment on the oxygen carrier, the selective and directional conversion of the gasification product can be realized, and the emission of gas pollutants and heavy metals can be effectively controlled. In view of the advantages, the chemical chain gasification technology of the sludge is an effective way for the efficient resource utilization of the sludge, and has a very wide application prospect.
In chemical looping gasification, the oxygen carrier serves as a hub connecting the gasification reactor and the regeneration reactor, and has the functions of transferring heat and supplying lattice oxygen. Therefore, oxygen carriers are the core and key to chemical looping gasification technology. Scholars at home and abroad have made many meaningful studies to screen for suitable oxygen carriers. It is generally believed that the active ingredients that can be used as oxygen carriers are mainly: sulfates such as CaSO4, BaSO4, SrSO4, and oxides of Ni, Fe, Cu, and Mn. Summary of the existing literature, it is found that the conventional oxygen carriers generally have the problems of low mechanical strength, easy abrasion, easy sintering, low reactivity, poor cycling reactivity, high manufacturing cost, and the like, and therefore, the exploration and development of the oxygen carriers with high mechanical strength, strong reactivity and low price are the problems to be solved urgently by the chemical-looping gasification technology.
The steel slag is a main solid waste in the metallurgical industry, and with the increasing pressure of environmental protection, proper treatment and disposal of the steel slag become important problems in the industry. According to the latest data of the world iron and steel association, the global crude steel yield is 16.89 hundred million tons in 2017, and the Chinese crude steel yield is 8.32 hundred million tons, which accounts for about 50 percent of the total global crude steel yield. Based on the current steel-making process, 10 to 15 percent of steel slag is generated in the crude steel smelting process, which means that about 1 million tons of steel slag are generated in China every year, but the comprehensive utilization rate is less than 30 percent. A large amount of steel slag is stacked, so that the steel slag not only occupies a large amount of farmlands, but also can influence the air quality and pollute water resources, and serious negative effects are caused on the ecological environment. If the steel slag can not be comprehensively utilized, more and more land is inevitably occupied, great pressure is caused to the ecological environment, the sustainable development of the steel industry in China can be seriously hindered, and the abandoning and accumulation of the steel slag are waste of resources. Therefore, how to carry out efficient resource utilization on the steel slag is an urgent problem for the green and healthy development of the steel industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and provide a chemical chain sludge gasification system based on a steel slag oxygen carrier.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
although the chemical components of the steel slag are different with different steelmaking equipment, processes and raw materials, the main components of the steel slag are composed of oxides of iron, manganese, calcium, silicon, magnesium, aluminum, silicon and the like, and the steel slag has the characteristics of high hardness, high density and strong abrasion resistance. Therefore, these physicochemical properties of steel slag make it potentially useful as an oxygen carrier. Based on the concept of 'treating waste with waste', the technology utilizes the steel slag as an oxygen carrier in the chemical-looping gasification process of the sludge, can realize volume reduction and decrement of the sludge and the steel slag, can obviously reduce the emission of pollutants compared with the direct incineration of the sludge, and can obtain better economic benefit because the gasification product is combustible gas.
The utility model relates to a chemical chain gasification system of mud based on slag oxygen carrier, including combustible gas collection device, filter equipment, main cyclone, mainstream fluidized bed, mill, air-blower, vice bed cyclone, side fluidized bed and ash bucket, the slag feed inlet, sludge feed inlet and the vapor import of mainstream fluidized bed all get into through the air-blower, the slag feed inlet with the sludge feed inlet all is provided with the mill, the upper end export of mainstream fluidized bed with the entry linkage of main cyclone, the middle part entry of mainstream fluidized bed with the lower extreme exit linkage of vice bed cyclone, the upper end export of main cyclone with filter equipment's entry linkage, filter equipment's export with combustible gas collection device connects, the lower extreme export of main cyclone with the lower extreme entry linkage of side fluidized bed, and the inlet of the auxiliary bed cyclone separator is connected with the outlet at the upper end of the auxiliary fluidized bed, and the lower ends of the main fluidized bed and the auxiliary fluidized bed are both provided with ash hoppers.
The utility model relates to a sludge chemical chain gasification technology based on steel slag oxygen carrier, including following step:
(1) respectively grinding the dry sludge and the steel slag in a grinder to proper particle sizes, respectively feeding the dry sludge and the steel slag into a fluidized bed, feeding water vapor into a main fluidized bed according to a corresponding proportion, and carrying out oxidation reaction on organic matters and combustible components in the sludge, the water vapor and lattice oxygen in metal oxide of the steel slag in the main fluidized bed to generate CO and H2And CH4Isocombustible gas, and a small amount of CO2；
(2) After the gas-solid mixture after reaction is separated by the cyclone separator of the main bed, the generated combustible gas is filtered by the filter device and then is collected by the combustible gas collection device; the reduced steel slag enters a secondary fluidized bed to generate oxidation reaction with air and is activated again, then the reduced steel slag is separated by a secondary bed cyclone separator and enters a fuel reactor again for cyclic utilization, and the inactivated steel slag and sludge ash are collected by an ash bucket;
(3) because the steel slag contains CaO component, a small amount of sulfide and CO are generated in the gasification process2Can also be absorbed, and reduces the pollution to the environment.
The beneficial effects of the utility model reside in that:
the utility model relates to a mud chemical chain gasification system based on slag oxygen carrier compares with prior art, the utility model discloses use present municipal sludge and the difficult actual problem of handling of steel industry slag as the starting point, based on the theory based on "treat useless with the other wastes against each other", developed the mud chemical chain gasification technique based on slag oxygen carrier, help realizing the volume reduction decrement of mud and slag through this research, can also retrieve the calorific value in the mud simultaneously, realize the energy utilization of mud. Compared with the prior sludge treatment technology, the utility model can obviously reduce the operation cost, reduce the pollutant emission in the production process and has better social, economic and environmental protection benefits.
Drawings
FIG. 1 is a process diagram of a chemical chain gasification device for sludge based on steel slag oxygen carrier;
fig. 2 is a process diagram of the main fluidized bed of the present invention;
FIG. 3 is a process diagram of a secondary fluidized bed of the present invention;
FIG. 4 is an SEM image of the steel slag of the present invention;
FIG. 5 is a graph showing the wear characteristics of the steel slag according to the present invention;
FIG. 6 is a graph showing the relationship between the oxygen release amount of steel slag and the cycle number.
In fig. 1: 1-combustible gas collection device, 2-filter device, 3-main cyclone separator, 4-main fluidized bed, 5-mill, 6-blower, 7-auxiliary bed cyclone separator, 8-auxiliary fluidized bed, 9-ash bucket.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1: the utility model relates to a chemical chain gasification system of mud based on slag oxygen carrier, including combustible gas collection device 1, filter equipment 2, main cyclone 3, mainstream fluidized bed 4, mill 5, air-blower 6, sub-bed cyclone 7, side fluidized bed 8 and ash bucket 9, the slag feed inlet, sludge feed inlet and the vapor inlet of mainstream fluidized bed all get into through the air-blower, the slag feed inlet with the sludge feed inlet all is provided with the mill, the upper end export of mainstream fluidized bed with the entry linkage of main cyclone, the middle part entry of mainstream fluidized bed with the lower extreme exit linkage of sub-bed cyclone, the upper end export of main cyclone with filter equipment's entry linkage, filter equipment's export with combustible gas collection device connects, the lower extreme export of main cyclone with the lower extreme entry linkage of side fluidized bed, and the inlet of the auxiliary bed cyclone separator is connected with the outlet at the upper end of the auxiliary fluidized bed, and the lower ends of the main fluidized bed and the auxiliary fluidized bed are both provided with ash hoppers.
The utility model relates to a sludge chemical chain gasification technology based on steel slag oxygen carrier, including following step:
(1) respectively grinding the dry sludge and the steel slag in a grinder to proper particle sizes, respectively feeding the dry sludge and the steel slag into a fluidized bed, feeding water vapor into a main fluidized bed according to a corresponding proportion, and carrying out oxidation reaction on organic matters and combustible components in the sludge, the water vapor and lattice oxygen in metal oxide of the steel slag in the main fluidized bed to generate CO and H2And CH4Isocombustible gas, and a small amount of CO2；
(2) After the gas-solid mixture after reaction is separated by the cyclone separator of the main bed, the generated combustible gas is filtered by the filter device and then is collected by the combustible gas collection device; the reduced steel slag enters a secondary fluidized bed to generate oxidation reaction with air and is activated again, then the reduced steel slag is separated by a secondary bed cyclone separator and enters a fuel reactor again for cyclic utilization, and the inactivated steel slag and sludge ash are collected by an ash bucket;
(3) because the steel slag contains CaO component, a small amount of sulfide and CO are generated in the gasification process2Can also be absorbed, and reduces the pollution to the environment.
As shown in fig. 2, in the main fluidized bed, i.e. the fuel reaction chamber, organic matters and combustible components in the sludge undergo oxidation reaction with water vapor and lattice oxygen in the metal oxide of the steel slag to generate combustible gases such as CO, H2 and CH4, and a small amount of CO2, and at the same time, because the steel slag contains CaO component, a small amount of sulfide and CO2 generated in the gasification process can be absorbed, thereby reducing environmental pollution.
The schematic diagram of the secondary fluidized bed is shown in fig. 3, the secondary fluidized bed is an air reaction chamber, the reduced steel slag enters the secondary fluidized bed to be oxidized with air and activated again, then the reduced steel slag is separated by a secondary bed cyclone separator and enters a fuel reactor again for recycling, and the inactivated steel slag and sludge ash are collected by an ash bucket.
Theoretical design calculation: the dry basis heat value of the primary sludge is about 15000-18000 kJ/kg, which is equivalent to that of lignite through experimental determination. By adopting the chemical chain gasification technology, theoretically, 1t of dry sludge can produce 2000m of combustible gas3About, according to C/O ratio to estimate, 5 tons of steel slag can be digested. Compared with direct incineration, the chemical chain gasification of the sludge can reduce the discharge of NOx by 25kg and reduce SO220kg was discharged.
The concrete calculation is based on the notice of the related work of the settlement of the pollution discharge charge issued by the State environmental protection administration and the calculation.
The calculation formula of NOx generated in the combustion process is as follows:
GNOx＝1.63×B×(N×β+0.000938)
GNOX-nitrogen oxide emission, kg;
b-amount of fuel consumed, kg;
n-the nitrogen content of the fuel,%;
β -Nitrogen conversion in Fuel,%.
Burn overSO produced in the process2The calculation formula is as follows:
GSO2＝B×Sy×KSO2×λSO2
GNOX-nitrogen oxide emission, kg;
b-amount of fuel consumed, kg;
Sy-Sulfur content in Fuel,%;
KSO2-conversion of fuel flow into flue gas stream,%;
λSO2——SO2mole ratio with S,%.
As lattice oxygen in the steel slag is mainly used to replace a gasification medium in the conventional gasification reaction in the chemical chain gasification process of the sludge, the oxygen element required by the gasification reaction is provided for the fuel, SO that SO can be effectively reduced2And thermal NOxIs generated. The content of CaO in the steel slag is higher, and the generated SO can be treated2And CO2Plays a certain absorption role, so compared with direct incineration, the NO can be greatly reducedxAnd SO2And (4) discharging.
Performance testing and analysis: laboratory research is carried out on the relative performances of the steel slag, such as the appearance characteristic, the abrasion resistance, the oxygen absorption and release characteristic and the like.
The scanning electron microscope image of the steel slag with the particle size of 100 to 150 μm is shown in FIG. 4, and the specific surface area and the pore structure are measured to show that the steel slag has the specific surface area of 23.2m2Per g, pore volume 33 × 10-3cm3(ii) in terms of/g. The steel slag abrasion characteristic study is carried out according to the air test abrasion standard experimental method issued by ASTM 'catalyst D-32 Committee', the experimental result is shown in figure 5, and after 12h abrasion experiment, the total abrasion rate of the steel slag is only 0.22%. The experimental result of the cyclic oxygen absorption and release of the steel slag is shown in fig. 6, the oxygen release amount of the steel slag is reduced along with the increase of the reaction times, but the oxygen release amount is still more than 3.8 percent after 10 times. The experimental data show that the steel slag can be completely used as an oxygen carrier for chemical chain gasification.
According to data, if a treatment method supported by China (such as land utilization and incineration) is adopted, the treatment of sludge with 80% of water content requires 500 yuan per ton on average at present. Although the steel slag has a certain market of a seller, the market is increasingly atrophied, the produced steel slag cannot be well digested, and the requirement of environmental protection is increasingly strict, so that the average cost of treating each ton of steel slag is 100 yuan at present.
The chemical chain gasification technology of the sludge based on the steel slag oxygen carrier can realize volume reduction and decrement of the sludge and the steel slag, simultaneously can recover the heat value in the sludge, and has the gas production rate of 3m3/kg (dry sludge). After the conversion, the technology is adopted to treat the sludge with the water content of 80 percent per ton and the steel slag per ton with the total cost of only 250 yuan. The operation cost can be reduced for sewage treatment plants and steel plants, and the enterprise profit is improved. Theoretically, by adopting the technology, 2000 cubic meters of combustible gas can be generated by treating 1 ton of dry sludge, 5 tons of digested steel slag can be generated, and compared with the direct incineration of sludge, the emission of NOx can be reduced by 25kg, and the emission of SO2 can be reduced by 20 kg. Therefore, the chemical chain gasification technology of the sludge based on the steel slag oxygen carrier can be comprehensively popularized and applied by virtue of cost advantages and environmental protection advantages.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A chemical chain of mud gasification system based on slag oxygen carrier which characterized in that: the device comprises a combustible gas collecting device, a filtering device, a main cyclone separator, a main fluidized bed, a grinder, a blower, an auxiliary bed cyclone separator, an auxiliary fluidized bed and an ash bucket, wherein a steel slag feed inlet, a sludge feed inlet and a water vapor inlet of the main fluidized bed are all fed by the blower, the steel slag feed inlet and the sludge feed inlet are respectively provided with the grinder, an outlet at the upper end of the main fluidized bed is connected with an inlet of the main cyclone separator, an inlet at the middle part of the main fluidized bed is connected with an outlet at the lower end of the auxiliary bed cyclone separator, an outlet at the upper end of the main cyclone separator is connected with an inlet of the filtering device, an outlet of the filtering device is connected with the combustible gas collecting device, an outlet at the lower end of the main cyclone separator is connected with an inlet at the lower end of the auxiliary fluidized bed, an inlet of the auxiliary bed cyclone separator is connected with an outlet at the upper, and ash hoppers are arranged at the lower end of the main fluidized bed and the lower end of the auxiliary fluidized bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921102356.0U CN210855751U (en) | 2019-07-15 | 2019-07-15 | Sludge chemical chain gasification system based on steel slag oxygen carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921102356.0U CN210855751U (en) | 2019-07-15 | 2019-07-15 | Sludge chemical chain gasification system based on steel slag oxygen carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210855751U true CN210855751U (en) | 2020-06-26 |
Family
ID=71285898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921102356.0U Active CN210855751U (en) | 2019-07-15 | 2019-07-15 | Sludge chemical chain gasification system based on steel slag oxygen carrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210855751U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342770A (en) * | 2019-07-15 | 2019-10-18 | 河南城建学院 | Sludge chemical chain gasification system and technique based on steel slag oxygen carrier |
-
2019
- 2019-07-15 CN CN201921102356.0U patent/CN210855751U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342770A (en) * | 2019-07-15 | 2019-10-18 | 河南城建学院 | Sludge chemical chain gasification system and technique based on steel slag oxygen carrier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108870407B (en) | Method for treating sludge through chemical-looping gasification based on copper slag as oxygen carrier and device for implementing method | |
| CN1270988C (en) | Sludge burning treatment method and system | |
| CN103934254B (en) | A kind of system and method for cement kiln associated treatment domestic waste | |
| CN102615092B (en) | A kind of municipal refuse treatment device and method | |
| CN110055104A (en) | A kind of method that the utilization of low-order coal sub-prime prepares natural gas | |
| CN203330111U (en) | Municipal waste environment-friendly type recycling cyclic utilization processing system | |
| CN110746991B (en) | Garbage pyrolysis sewage treatment system and method | |
| US20230194080A1 (en) | Method and apparatus for removing pollutants from organic solid waste by pyrolysis coupled with chemical looping combustion | |
| CN1891841B (en) | Regenerative lead processing method and apparatus | |
| CN113121082A (en) | Device and method for resource utilization and harmless treatment of oily sludge | |
| CN210855751U (en) | Sludge chemical chain gasification system based on steel slag oxygen carrier | |
| CN110342770A (en) | Sludge chemical chain gasification system and technique based on steel slag oxygen carrier | |
| CN2787656Y (en) | Apparatus for cremation and treatment of sludge | |
| CN108426250A (en) | A kind of domestic garbage gasification melting electricity generation system | |
| CN111286365A (en) | Multi-class solid waste comprehensive disposal method and system for gasification power generation and cement production | |
| CN104531183B (en) | System for transforming waste combustible material recovered from building rubbish into clean gas | |
| CN112850644A (en) | Device and method for preparing high-purity hydrogen by gasifying household garbage through plasma | |
| CN104676579A (en) | High-efficiency energy-saving emission reduction system with clean coal combustion technology | |
| CN108424790A (en) | A kind of refuse gasification cogeneration system | |
| CN205528591U (en) | A reaction unit for pyrolysis and carbonization that gives up admittedly organically | |
| CN208600439U (en) | House refuse electricity generation system | |
| CN217265286U (en) | Device for efficiently treating landfill leachate with low carbon by using cement kiln | |
| CN204922949U (en) | High -efficient energy saving and emission reduction system of clean combustion technology of coal | |
| CN104593023B (en) | The biomass that will be reclaimed from building waste carry out the technique and device of gasification energy conversion | |
| CN208545369U (en) | House refuse prepares fuel gas system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231030 Address after: No. 111, Building 1, Chenlei Science and Technology Park, No.1 Qunxing 1st Road, Suzhou Industrial Park, Suzhou City, Jiangsu Province, 215000 Patentee after: Anming Machinery Jiangsu Co.,Ltd. Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Effective date of registration: 20231030 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: 467036 Henan province Pingdingshan city new city Longxiang Road Patentee before: Henan University of Urban Construction |
|
| TR01 | Transfer of patent right |