CN108870407A - It is a kind of that the method for sludge is handled based on the chemical chain gasification that copper ashes is oxygen carrier and realizes the device of this method - Google Patents
It is a kind of that the method for sludge is handled based on the chemical chain gasification that copper ashes is oxygen carrier and realizes the device of this method Download PDFInfo
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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
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/027—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using cyclone separators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2205/00—Waste feed arrangements
- F23G2205/12—Waste feed arrangements using conveyors
- F23G2205/121—Screw conveyor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/40—Intercepting solids by cyclones
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses the devices of a kind of method based on the chemistry refining gasification process sludge that copper ashes is oxygen carrier and realization this method.This method uses chemical chain gasification technology, is oxygen carrier by high temperature air calcining and activating, and then handle domestic sludge using double-circulating fluid bed device using copper ashes as presoma.The present invention has innovated the using mechanism of solid waste, while resource utilization copper ashes, realizes that minimizing to sludge, innoxious, recycling treatment, the treatment of wastes with processes of wastes against one another have very strong economic adaptability, extremely meet environmentally protective new demand.
Description
Technical field：
The invention belongs to fuel cleaning gasification, functional material and environmental protection technical fields, and in particular to one kind is based on copper
Slag is that the chemical chain gasification of oxygen carrier handles the method for sludge and realizes the device of this method.
Background technique：
Population increases, the fast development of global economy causes China or even whole world sludge yield to continue largely to increase,
The organic matters such as a large amount of N, P for containing in sludge, bacterial micro-organism, heavy metal and toxic pollutant etc., if do not obtained effectively
Processing, will pose a serious threat environment.
Existing Treatment of Sludge principle is to realize the minimizing of sludge, recycling, stabilization processes, and processing method is mainly wrapped
Include landfill, agricultural use and thermochemical study method.But due to technology and cost problem, the main Treatment of Sludge mode in China is
There is waste land resource, cause the serious shortcomings such as secondary pollution in landfill；And thermochemical study method is effectively being realized because of it
Recycle energy in a part of sludge while mud decrement processing, reduce secondary pollution, preferably embody sludge reduction,
Innoxious, recycling treatment principle.
Sludge thermochemical study mode mainly includes pyrolysis, gasification, burning, compared to pyrolyzing sludge and burning, sewage gas
Changing has the characteristics that lime-ash Leaching is low, gas pollutant discharges the widely used but traditional sludge of low, generation synthesis gas
Gasification mode cooks gasifying agent using air, vapor, pure oxygen etc., on the one hand improves the processing cost of sludge gasification, while
Various gas pollutants (NOx) easily generated and sulfide.
Copper ashes is waste material made of various oxides melt mutually in furnace charge and fuel during copper metallurgy, be black, densification,
Wear-resisting, the irregular particulate matter for having metallic luster.The specific chemical composition of clinker with smelting furnace, technique and tcrude ore difference
And change, but main component is fayalite (Fe2SiO4), magnetic iron ore (Fe3O4) and copper gold-plating, additionally containing a small amount of Ni,
Co, Zn, Ag, Au element.According to statistics, one ton of copper of every production, can probably produce 2.2-3 tons of copper ashes；The annual copper metallurgy in China produces copper
Ten thousand tons of slag 400-500,50,000,000 tons or more are had reached so far, the bulk deposition of copper ashes can not only occupy a large amount of soils,
It is also possible to cause secondary pollution to atmosphere, soil, underground water.
It can be while realizing sewage sludge harmlessness, recycling treatment, resource utilization of the realization to copper ashes, the treatment of wastes with processes of wastes against one another,
It is a kind of new technology for integrating energy conversion, environmental protection.
Summary of the invention：
The purpose of the present invention is to provide it is a kind of based on copper ashes be oxygen carrier chemical chain gasification handle sludge method and
Realize the device of this method, method proposed by the present invention can be realized while resource utilization copper ashes waste to sludge
Innoxious, minimizing and recycling treatment.
The first purpose of the invention is to provide a kind of sides that sludge is handled based on the chemical chain gasification that copper ashes is oxygen carrier
Method includes the following steps：
(1) copper ashes passes through calcining and activating, spare as oxygen carrier after being crushed and sieving；
(2) oxygen carrier that step (1) obtains is reacted in fuel reactor with sludge, the mass ratio of oxygen carrier and sludge
It is 3~5:1, the oxygen carrier and synthesis gas after sludge, reduction after being reacted, sludge and a part after a part reaction are also
The mixture of oxygen carrier after original enters air reactor by material returning device, load under the action of air reactor, after reduction
Air reaction in oxysome and air reactor realizes the regeneration of oxygen carrier, and regenerated oxygen carrier is separated by air one cyclonic
Device solid outlet pipeline is back to fuel reactor, continues to form circulation, another part with the sludge reaction in fuel reactor
The mixture of the oxygen carrier and synthesis gas after sludge, another part reduction after reaction passes through the gas-solid of synthesis gas cyclone separator
After separation, the oxygen carrier after sludge and another part reduction after another part reaction is discharged by synthesis gas ash discharging hole, is synthesized
Gas enters integrated heat exchanger after gas solid separation, the waste heat in synthesis gas is shunted after integrated heat exchanger recycles, one
Synthesis gas is divided to mix the carrier gas as fuel reactor with vapor, the volume ratio of synthesis gas and vapor is in fuel reactor
2~3:6, the collection of another part synthesis gas is spare, and the air in air reactor is used as air after integrated heat exchanger absorbs heat
The carrier gas of reactor.The reaction temperature of air reactor is 850 DEG C~1000 DEG C, and the reaction temperature of fuel reactor is 700 DEG C
~900 DEG C.
The process of method proposed by the present invention for handling sludge based on the chemical chain gasification that copper ashes is oxygen carrier is：Using forging
As oxygen carrier redox reaction alternately occurs in fuel reactor and air reactor for the copper ashes after burning, realizes sludge
Gasification, specially oxygen carrier and sludge enter in fuel reactor according to certain charge proportion, in vapor and synthesis
Gas composition gaseous mixture provide fluidisation environment under with sludge reaction, sludge by a series of pyrolysis, gasification, water-gas shift,
Oxidation reaction generates synthesis gas, while oxygen carrier is reduced and loses Lattice Oxygen；Oxygen carrier (being mingled with sludge ash) after reduction exists
Fuel reactor is flowed out along material returning device under the action of flow field, the synthesis gas (being mingled with sludge ash) of generation enters synthesis cyclonic wind
Separator, synthesis gas remove after gas solid separation is by synthesis gas ash discharging hole discharge a part ash into synthesis gas bag filter
Sludge ash is gone, then enters integrated heat exchanger along pipeline, the waste heat of synthesis gas shunts after being recovered, a part of synthesis gas and water
Steam mixes the carrier gas as fuel reactor, and another part synthesis gas collects storage；Oxygen carrier (being mingled with sludge ash) passes through
Material returning device is back to air reactor jointly；Oxygen carrier after being reduced releases big calorimetric with air reaction in air reactor
Amount, while Lattice Oxygen is recaptured in oxygen carrier itself oxidation by air, realizes regeneration；Regenerated oxygen carrier (being mingled with sludge ash) is being flowed
Enter main air cyclone separator under the action of, is divided the two according to the difference in the mass density of oxygen carrier and sludge ash
It leaves, most oxygen carriers is back to fuel reactor from main air cyclone separator solid outlet pipeline, completes to follow
Ring；Sludge ash and flue gas (small part oxygen carrier, sludge ash) enter secondary air cyclone separator, under the influence of centrifugal force gas
Gu a certain amount of sludge ash and whole copper ashes are isolated the circulatory system from flue gas ash discharging hole by separation, flue gas (sludge ash) then leads to
Cloth bag deduster ash disposal, then enter integrated heat exchanger along pipeline, from exhanst gas outlet discharge system after waste heat recycling；Due to row
The oxygen carrier of ash loss is supplemented into system by oxygen carrier feeder, realizes the stabilization of system operation；Wherein air is from environment
In be directly drawn into integrated heat exchanger, then pass through air compressor enters air reactor to counterflow heat exchange；Gasified water also passes through
Integrated heat exchanger is crossed, becomes vapor after counterflow heat exchange and is mixed with partially synthetic gas, fuel is entered after vapor compressor
Reactor.
It can be collected by the ash content that synthesis gas ash discharging hole and flue gas ash discharging hole are discharged and further be utilized.Because of sludge
Content of ashes is high, and the process of a large amount of ash discharges will cause a large amount of losses of oxygen carrier simultaneously, constantly generates a large amount of high-temperature ash, this
When sludge in the germ that contains be killed, brickmaking can be directly brought, so can be real while not expending too many thermal energy
Now system turns the exploitation of byproduct.
It is preferred that step (1) the specific steps are：Copper ashes is raised to 1100 DEG C with 15 DEG C/min to calcine within constant temperature 2 hours again,
Room temperature is naturally cooled to, crushing and screening goes out spare as oxygen carrier less than the particle of 100 mesh.On the one hand high-temperature calcination makes original copper
Ferrosilite in slag resolves into active component Fe2O3Or Fe3O4, so that it is had the attribute of oxygen carrier, on the other hand make it have good
Good mechanical endurance.
A second object of the present invention is to provide a kind of realize to handle sludge based on the chemical chain gasification that copper ashes is oxygen carrier
Method device, including fuel reactor, air reactor and integrated heat exchanger are provided with dirt in the fuel reactor
Mud feeder inlet and oxygen carrier feeder inlet, the fuel reactor and air reactor are connected by material returning device
It connects, the syngas outlet and synthesis gas cyclone separator of fuel reactor synthesize cyclonic wind by the first synthesis gas pipeline connection
Separator and synthesis gas bag filter by the second synthesis gas pipeline connection, with synthesis gas bag filter outlet connection the
Three synthesis gas pipelines are divided into the 4th synthesis gas pipeline and synthesis gas collection conduit after integrated heat exchanger；The cigarette of air reactor
Gas outlet is connected to main air cyclone separator by the first flue gas pipeline, and the solid outlet of main air cyclone separator is set
It is placed in the inside of fuel reactor, the exhanst gas outlet and secondary air cyclone separator of main air cyclone separator pass through second
Flue gas pipeline connection, secondary air cyclone separator are connected to flue gas bag filter by third flue gas pipeline, flue gas cloth bag
House outlet is connect with the 4th flue gas pipeline, and the 4th flue gas pipeline extends across integrated heat exchanger, the 4th fume pipe
Terminal portion is provided with exhanst gas outlet；The sewage sludge feed device is sludge two-stage screw feeder, the sludge two-stage screw
Feeder is equipped with by front and back above and below two screw-feeders and bunker.The present invention uses sludge two-stage screw feeder,
Sludge can be reduced because there is the non-uniform situation of inlet amount in local moist, frictional force is insufficient short time, it can be ensured that sludge into
Doses it is constant, be conducive to the stable operation of system.Device in the process of running can discharge because of sludge ash content itself and copper
A large amount of losses of slag oxygen carrier generate a large amount of lime-ash in ash discharging hole, this lime-ash has the good potentiality of brickmaking, also can be preferably real
Existing utilization of waste as resource.
It is preferred that the fuel reactor is internally provided with several drainage baffles.The setting of drainage baffle makes oxygen carrier
It is sufficiently reacted with sludge.
It is preferred that be provided with air pipe line on the integrated heat exchanger, air pipe line by integrated heat exchanger heat exchange with
Air reactor connects, carrier gas of the air in air pipe line as air reactor.
It is preferred that the 4th synthesis gas pipeline and vapor pipeline are combined into fuel reactor, synthesis gas and water steam
Carrier gas of the gas as fuel reactor.
It is preferred that the fuel reactor bottom is provided with fuel reactor air distribution plate, air reactor bottom is provided with
Air reactor air distribution plate.The effect of fuel reactor air distribution plate and air reactor air distribution plate is the bottom for supporting reactor bottom
Material, guarantees normal fluidized state at uniformly distributed air.
Device proposed by the present invention, which has, facilitates operation, is easy to be mass produced, good in economic efficiency advantage.
The beneficial effects of the invention are as follows：
1, the present invention is one sludge two-stage screw feeder of feed design of sludge, it is possible to reduce sludge is because of local tide
There is the non-uniform situation of inlet amount in wet, frictional force is insufficient short time, it can be ensured that sewage sludge feed amount it is constant, be conducive to system
Stable operation.
2, the present invention devise two cyclone separators come separated sludge ash, it can be ensured that the deliming performance of system；Due to
Contain a large amount of ash contents (the 50% of butt) in sludge, sludge gasification generates a large amount of ashes and is blended in one with oxygen carrier in cyclic process
Rise, using can not be used as ordinary circumstance when chemical chain gasification technology ash discharge a cyclone separator just by oxygen carrier and
Ash separation；Main air cyclone separator of the invention, which provides a powerful centrifugal force, keeps most ash contents (a small amount of
Oxygen carrier) follow flue gas to enter secondary air cyclone separator, the purifying smoke in the lesser situation of relative power, oxygen carrier
System is isolated from flue gas ash discharging hole with partial sludge ash, reduces the operating pressure of downstream fume gas bag filter.
3, the present invention devises integrated heat exchanger and is used to realize the heat exchange between high-temperature flue gas and synthesis gas and other carrier gas,
Waste heat recycling can be achieved, so that it is guaranteed that the resource in sludge handling process maximally utilizes.
4, the characteristic at low cost present invention preserves conventional chemical chain gasification synthesis gas quality height, purification：Traditional gasification example
Pure oxygen or air is such as added, the former can bring a large amount of energy consumptions during preparing pure oxygen, directly reduce whole system
Energy efficiency；The latter can reduce the concentration of synthesis gas, cause the raising of gas purification cost；And sludge chemical chain gasification process
In without pure oxygen or air as gasifying agent, but use vapor as gasifying medium, particularly mixing joined sewage gas
Change the partially synthetic gas generated as carrier gas, guarantees that the reactant in fuel reactor can be in fluidisation state, prepared synthesis
Gas is not by air or O2It is diluted, synthesis gas quality is high, purifies at low cost；Furthermore oxygen carrier does not undertake an oxidation, catalysis singly
The carrier of function or the system heat of sludge, takes the amount of heat that air reactor oxidation heat liberation discharges to fuel reactor,
The heat absorbed by gasification reduction reaction is supplemented, system is made to realize self-heating, it is energy saving.
5, the present invention is compared with other Heat-chemical Treat Method of Sludge modes, since gasification temperature is relatively low, does not have gas phase oxygen
In the presence of advantageously reducing the formation of NOx and sulfurous pollutants；Simultaneously because strong reducing property atmosphere and vapor are deposited in reactor
, the phosphorus in sludge ash is conducive to the recycling of phosphorus mostly with the presence of water-soluble phosphate, and it is energy saving, it reduces environmental pollution.
6, the present invention has innovated the using mechanism of solid waste, while resource utilization copper ashes, realizes to sludge
Minimizing, innoxious, recycling treatment, the treatment of wastes with processes of wastes against one another has very strong economic adaptability, extremely meets environmentally protective new
It is required that.
Detailed description of the invention：
Fig. 1 is that the present invention realizes that the apparatus structure for the method for handling sludge based on the chemical chain gasification that copper ashes is oxygen carrier shows
It is intended to, arrow indicates flue gas, synthesis gas, air or vapor flow direction；
Description of symbols：1, air reactor air distribution plate；2, material returning device；3, air reactor；4, fuel reactor；5,
Synthesis gas cyclone separator；6, synthesis gas bag filter, 7, main air cyclone separator；8, secondary air cyclonic separation
Device；9, flue gas bag filter；10, oxygen carrier feeder；11, sludge two-stage screw feeder；12, fuel reactor cloth wind
Plate；13, vapor compressor；14, air compressor；15, the first synthesis gas pipeline；16, the second synthesis gas pipeline；17, third
Synthesis gas pipeline；18, the 4th synthesis gas pipeline；19, the first flue gas pipeline；20, the second flue gas pipeline；21, third flue gas pipeline；
22, the 4th flue gas pipeline；23, vapor pipeline；24, air pipe line；25, synthesis gas ash discharging hole；26, flue gas ash discharging hole；27, cigarette
Gas outlet；28, air intlet；29, water inlet is used in gasification；30, integrated heat exchanger.
Specific embodiment：
The following examples are further illustrations of the invention, rather than limiting the invention.
Except special instruction, equipment mentioned in the present invention and material are commercially available.
Embodiment 1：
1) preparation of oxygen carrier and sludge：
The original copper ashes provided using Nanjing Steel & Iron Plant is crushed first as matrix, and average grain diameter is probably on the left side 1mm
It is right；It is evenly placed upon in high temperature Muffle furnace, ulking thickness is raised to 1100 DEG C of perseverances again from room temperature in 15mm, with 15 DEG C/min
Temperature 2 hours is continually fed into fresh air into furnace in calcination process, realize air calcination, then naturally cool to room temperature；It takes out broken
Broken, screening (100 mesh), storage obtain target oxygen carrier, the elemental analysis such as table 1 of original copper ashes and 1100 DEG C of copper ashes calcined
Shown, calcining causes the increase of oxygen element content in oxygen carrier, this is because the decomposition reaction (Eq.1) of ferrosilite has occurred.
2Fe2SiO4+ (abundance) O2→2Fe2O3+2SiO2 (Eq.1)
The elemental analysis of table 1, original copper ashes
The sludge raw material of use is from the domestic sludge of Guangzhou Shuande sewage treatment plant.It has been dried at 105 DEG C 48 small
When, it is then sieved by 80 mesh screens, Industrial Analysis and elemental analysis are shown in Table 2：
The elemental analysis and Industrial Analysis of table 2, sludge
2) device operating scheme is as follows：
The structural schematic diagram of device as shown in Figure 1 mainly includes air reactor 3, fuel reactor 4, synthesis gas
Cyclone separator 5, main air cyclone separator 7, secondary air cyclone separator 8, material returning device 2, oxygen carrier feeder 10, dirt
Mud two-stage screw feeder 11, air compressor 14, vapor compressor 13, integrated heat exchanger 30, pass through corresponding size pipeline
Form the circulatory system.
Fuel reactor 4 and air reactor 3 are connected by material returning device 2, the syngas outlet and synthesis of fuel reactor 4
Cyclonic wind separator 5 is connected to by the first synthesis gas pipeline 15, and synthesis gas cyclone separator 5 and synthesis gas bag filter 6 are logical
The connection of the second synthesis gas pipeline 16 is crossed, is changed with the third synthesis gas pipeline 17 of synthesis gas bag filter outlet connection by integrated
It is divided into the 4th synthesis gas pipeline 18 and synthesis gas collecting after hot device 30；The exhanst gas outlet and main air of air reactor 3
Cyclone separator 7 is connected to by the first flue gas pipeline 19, and the solid outlet of main air cyclone separator 7 is set to fuel reaction
The inside of device 4, the exhanst gas outlet and secondary air cyclone separator 8 of main air cyclone separator 7 pass through the second flue gas pipeline
20 connections, secondary air cyclone separator 8 are connected to flue gas bag filter 9 by third flue gas pipeline 21, and flue gas cloth bag removes
The outlet of dirt device 9 is connect with the 4th flue gas pipeline 22, and the 4th flue gas pipeline 22 extends across integrated heat exchanger 30, the 4th flue gas pipeline
22 ends are provided with exhanst gas outlet 27.
Sludge two-stage screw feeder 11 is formed with front and back above and below two screw-feeders and bunker；Air is anti-
3 top right of device is answered to go out root canal road connection main air cyclone separator 7；The gas vent of main air cyclone separator 7 connects
Then secondary air cyclone separator 8；The solid outlet of 8 lower part of secondary air cyclone separator is flue gas ash discharging hole 26, top
Exhanst gas outlet be connected to flue gas bag filter 9, followed by the 4th flue gas pipeline 22 enter integrated heat exchanger 30 recycle heat,
Finally it is discharged by exhanst gas outlet 27；The solid outlet pipeline of 8 lower part of secondary air cyclone separator protrudes into inside fuel reactor 4
Close to the right side of sludge two-stage screw feeder 11；4 interior design of fuel reactor, two drainage baffles, devise one above
The air outlet of a synthesis gas is connected to synthesis gas cyclone separator 5；Synthesis gas passes through the gas on 5 top of synthesis gas cyclone separator
Outlet imports synthesis gas bag filter 6, then imports integrated heat exchanger 30, and then synthesis gas is in the outlet of integrated heat exchanger 30 point
Stream, a part mix the carrier gas as fuel reactor 4 with the vapor pipeline 23 that integrated heat exchanger 30 exports, and a part is passed through
Synthesis gas collection port utilizes, and 5 lower part of synthesis gas cyclone separator is synthesis gas ash discharging hole 25；Fuel reactor 4 and air reaction
Device 3 is connected by material returning device 2；Gasification water passes through integrated heat exchanger 30 by gasification 29 adverse current of water inlet, the synthesis gas with shunting
Mixing enters by fuel reactor air distribution plate 12 and fires by being passed directly into 4 bottom of fuel reactor after vapor compressor 13
Expect reactor 4；Fresh air by 28 adverse current of air intlet by after integrated heat exchanger 30, using being provided with air compressor 14
Air pipe line 24 be directly entered 3 bottom of air reactor, by air reactor air distribution plate 1 enter air reactor 3.
When system brings into operation, the oxygen carrier and sludge of preparation are 5 according to mass ratio:1 charge proportion enters fuel
In reactor 8, vapor and synthesis gas composition gaseous mixture provide fluidisation environment under with sludge reaction, sludge pass through a system
The pyrolysis of column, gasification, water-gas shift, oxidation reaction generate synthesis gas (R (2)-R (8)), while oxygen carrier is reduced and loses lattice
Oxygen；Oxygen carrier (being mingled with sludge ash) after reduction flows out fuel reactor 4 along material returning device 2 under the action of flow field, and one is small
Part oxygen carrier and sludge ash are synthesized gas entrainment and enter synthesis gas cyclone separator 5, by the gas of synthesis gas cyclone separator 5
Gu sub-fraction oxygen carrier and sludge ash are discharged by synthesis gas ash discharging hole 25 after separation, synthesis gas is in synthesis gas cyclone separator 5
Gas solid separation after along the second synthesis gas pipeline 16 enter synthesis gas bag filter 6, again by third synthesis gas pipeline 17
Into integrated heat exchanger 30, synthesis gas is split into two parts after waste heat recycling, and a part of synthesis gas passes through the 4th synthesis gas pipeline
18 mix the carrier gas as fuel reactor 4 with vapor pipeline 23, into the synthesis gas of fuel reactor and the body of vapor
Product is than being 3:6；Another part synthesis gas is collected by synthesis gas collecting deposit；Oxygen carrier (being mingled with sludge ash) passes through returning charge
Device 2 is back to air reactor 3；Oxygen carrier after being reduced releases amount of heat with air reaction in air reactor 3, together
When oxygen carrier itself oxidation by air recapture Lattice Oxygen, realize regeneration；Regenerated oxygen carrier (being mingled with sludge ash) is in flow field
Effect is lower to enter main air cyclone separator 7, is separated the two according to the difference in the mass density of oxygen carrier and sludge ash
It opens, most oxygen carriers is back to fuel reactor 4 from the solid outlet pipeline of main air cyclone separator 7, completes
Circulation；Sludge ash and flue gas (small part oxygen carrier) enter secondary air cyclone separator 8, under the influence of centrifugal force gas-solid point
From partial sludge grey (remaining oxygen carrier) being isolated the circulatory system from flue gas ash discharging hole 26, flue gas is then along the 4th fume pipe
Road 22 enters flue gas bag filter 9, integrated heat exchanger 30 is entered back into, from 27 discharge system of exhanst gas outlet after waste heat recycling；By
System is supplemented by oxygen carrier feeder 6 in the oxygen carrier of ash discharge loss, guarantees oxygen carrier and sludge in operational process
Charge-mass ratio is 5, realizes the stabilization of system operation；Wherein fresh air is directly extracted from environment, by air intlet 28 into
Enter integrated heat exchanger 30, then counterflow heat exchange passes through air compressor 14 and enters air reactor 3；Gasified water from gasification water into
Mouth 29 imports, and by integrated heat exchanger 30, becomes vapor after counterflow heat exchange and mixes with partially synthetic gas, compress by vapor
Enter fuel reactor 4 after machine 13；In entire reaction process, air reactor 3 is kept to be in 900 DEG C of the condition of high temperature, and
Fuel reactor 4 is in 900 DEG C of temperature.
C/H+[O]→H2/CH4/CO/CnHm/CO2/H2O R(2)
CO+H2O→CO2+H2 R(3)
C+H2O→CO+H2 R(4)
CH4+H2O→CO+3H2 R(5)
CO+3Fe2O3→CO2+2Fe3O4 R(6)
C+2H2→CH4 R(7)
C+CO2→2CO R(8)
Operating parameter in the present embodiment and the results are shown in Table 3.Table 3 is the copper that Examples 1 to 4 handles 1100 DEG C of calcinings
Carbon dioxide in the implementation condition of slag and the synthesis gas obtained after the device of the invention is handled, hydrogen, carbon monoxide and
The gas content of methane.
Embodiment 2~4 is substantially the same manner as Example 1, and difference is as shown in table 3.
Table 3
It above should to the method provided by the invention based on the chemical chain gasification processing sludge that copper ashes is oxygen carrier and realization
The device of method is described in detail, technical solution of the present invention that the above embodiments are only used to help understand and
Its core concept, it is noted that those of ordinary skill in the art, without departing from the principle of the present invention,
Can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection scope of the claims in the present invention
It is interior.
Claims (7)
1. a kind of method for handling sludge based on the chemical chain gasification that copper ashes is oxygen carrier, which is characterized in that include the following steps：
(1) copper ashes passes through calcining and activating, spare as oxygen carrier after being crushed and sieving；
(2) oxygen carrier that step (1) obtains is reacted in fuel reactor with sludge, the mass ratio of oxygen carrier and sludge is 3
~5:1, the oxygen carrier and synthesis gas after sludge, reduction after being reacted, sludge and a part reduction after a part reaction
The mixture of oxygen carrier afterwards enters air reactor by material returning device, oxygen carrier under the action of air reactor, after reduction
Air reaction in body and air reactor realizes the regeneration of oxygen carrier, and regenerated oxygen carrier passes through air primary cyclone
Solid outlet pipeline is back to fuel reactor, continues to form circulation with the sludge reaction in fuel reactor, another part is anti-
The gas-solid point that the mixture of the oxygen carrier and synthesis gas after sludge, another part reduction after answering passes through synthesis gas cyclone separator
From rear, the oxygen carrier after sludge and another part reduction after another part reaction is discharged by synthesis gas ash discharging hole, synthesis gas
Enter integrated heat exchanger after the gas solid separation of synthesis gas cyclone separator, the waste heat in synthesis gas is passed through into integrated heat exchanger
Shunted after recycling, a part of synthesis gas mixes the carrier gas as fuel reactor with vapor, in fuel reactor synthesis gas and
The volume ratio of vapor is 2~3:6, the collection of another part synthesis gas is spare, and the air in air reactor passes through integrated heat exchange
Carrier gas after device heat absorption as air reactor.
2. the method according to claim 1 for handling sludge based on the chemical chain gasification that copper ashes is oxygen carrier, feature exist
In, step (1) the specific steps are：By copper ashes with 15 DEG C/min be raised to 1100 DEG C again constant temperature calcine, naturally cool to room temperature,
Crushing and screening goes out spare as oxygen carrier less than the particle of 100 mesh.
3. a kind of dress for realizing the method described in claim 1 for handling sludge based on the chemical chain gasification that copper ashes is oxygen carrier
It sets, which is characterized in that including fuel reactor, air reactor and integrated heat exchanger, be provided in the fuel reactor
Sewage sludge feed device feed inlet and oxygen carrier feeder inlet, the fuel reactor and air reactor are connected by material returning device
It connects, the syngas outlet and synthesis gas cyclone separator of fuel reactor synthesize cyclonic wind by the first synthesis gas pipeline connection
Separator and synthesis gas bag filter by the second synthesis gas pipeline connection, with synthesis gas bag filter outlet connection the
Three synthesis gas pipelines are divided into the 4th synthesis gas pipeline and synthesis gas collection conduit after integrated heat exchanger；The cigarette of air reactor
Gas outlet is connected to main air cyclone separator by the first flue gas pipeline, and the solid outlet of main air cyclone separator is set
It is placed in the inside of fuel reactor, the exhanst gas outlet and secondary air cyclone separator of main air cyclone separator pass through second
Flue gas pipeline connection, secondary air cyclone separator are connected to flue gas bag filter by third flue gas pipeline, flue gas cloth bag
House outlet is connect with the 4th flue gas pipeline, and the 4th flue gas pipeline extends across integrated heat exchanger, the 4th fume pipe
Terminal portion is provided with exhanst gas outlet, and the sewage sludge feed device is sludge two-stage screw feeder, the sludge two-stage screw
Feeder is equipped with by front and back above and below two screw-feeders and bunker.
4. according to claim 3 realize the dress for handling the method for sludge based on the chemical chain gasification that copper ashes is oxygen carrier
It sets, it is characterised in that：The fuel reactor is internally provided with several drainage baffles.
5. according to claim 3 realize the dress for handling the method for sludge based on the chemical chain gasification that copper ashes is oxygen carrier
It sets, it is characterised in that：Be provided with air pipe line on the integrated heat exchanger, by integrated heat exchanger heat exchange air pipe line with
Air reactor connects, carrier gas of the air in air pipe line as air reactor.
6. according to claim 3 realize the dress for handling the method for sludge based on the chemical chain gasification that copper ashes is oxygen carrier
It sets, it is characterised in that：The 4th synthesis gas pipeline and vapor pipeline is combined into fuel reactor, and synthesis gas and water steam
Carrier gas of the gas as fuel reactor.
7. according to claim 3 realize the dress for handling the method for sludge based on the chemical chain gasification that copper ashes is oxygen carrier
It sets, it is characterised in that：The fuel reactor bottom is provided with fuel reactor air distribution plate, and air reactor bottom is provided with
Air reactor air distribution plate.
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| CN110125160A (en) * | 2019-04-25 | 2019-08-16 | 东南大学 | A kind of method of the burning chemistry chains processing plant of poor iron ore as oxygen carrier |
| 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 |
| CN111534332A (en) * | 2020-04-28 | 2020-08-14 | 东南大学 | Microwave-assisted chemical-looping gasification soil heavy metal restoration plant heat treatment method |
| CN111732990A (en) * | 2020-06-22 | 2020-10-02 | 青岛理工大学 | Preparation process and method of oxygen carrier for chemical chain gasification of carbon-containing solid waste |
| CN111911934A (en) * | 2020-07-28 | 2020-11-10 | 东南大学 | Method for treating hazardous waste by using oxygen carrier to assist combustion of rotary kiln |
| CN113188129A (en) * | 2020-12-25 | 2021-07-30 | 中国科学院广州能源研究所 | Method and device for removing pollutants by organic solid waste pyrolysis coupling chemical chain combustion |
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