CN101191089B - Sludge and coal mixing fuel and using method thereof - Google Patents
Sludge and coal mixing fuel and using method thereof Download PDFInfo
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- CN101191089B CN101191089B CN2006101147189A CN200610114718A CN101191089B CN 101191089 B CN101191089 B CN 101191089B CN 2006101147189 A CN2006101147189 A CN 2006101147189A CN 200610114718 A CN200610114718 A CN 200610114718A CN 101191089 B CN101191089 B CN 101191089B
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/324—Dispersions containing coal, oil and water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/70—Blending
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2207/00—Control
- F23G2207/20—Waste supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2207/00—Control
- F23G2207/60—Additives supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2900/00—Special features of, or arrangements for incinerators
- F23G2900/55—Controlling; Monitoring or measuring
- F23G2900/55011—Detecting the properties of waste to be incinerated, e.g. heating value, density
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/50—Blending
- F23K2201/501—Blending with other fuels or combustible waste
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Dispersion Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a sludge coal mixing fuel which takes the industrial wastewater treated by sewage treatment plants, the sludge produced by city sewage, the sludge produced by sludge dredging of urban wastewater pipelines and sludge dredging of rivers, lakes and canals as the raw materials, wherein, the proportions (weight percentage ) of the sludge and the coal are that: the sludge accounts for 50 to 65 percent of compositions of the mixing fuel, and the coal accounts for 35 to 50 percent of the components of the mixing fuel. When the sludge coal mixing fuel of the invention is used, the sludge coal mixing fuel and the boiler fuel coal are respectively sent into the boiler, the feed quantity of the sludge coal mixing fuel is 20 to 30 percent of the boiler fuel coal.
Description
Technical field
The invention belongs to technical field of sewage, relate to processing and the comprehensive utilization of the mud that produces in trade effluent, the municipal sewage treatment process, be specifically related to a kind of sludge coal propellant combination and using method.
Background technology
When trade effluent, municipal sewage treatment, in sedimentation, sudden and violent gas process, produce solid-state, semi-solid state and the liquid waste-mud of some amount.The mud that sewage work produces is divided into just settling bowl mud, active sludge, grid slag, sand setting, sediment and scum silica frost etc.The composition of preliminary sedimentation tank mud is based on organism, organic content is generally between 55～70%, second pond mud contains organism and chemical agent, generally between 70～80%, generally between 5.7～7.5, the settling tank moisture percentage in sewage sludge is generally more than 95% for the pH value of three kinds of mud for the organic content of active sludge, behind mechanical dehydration, generally about 80%, calorific value is generally 3,550KJ/KG to water ratio.The network of drains desilting in city, river, lake, irrigation canals and ditches desilting also can produce a large amount of mud.
The composition of mud is very complicated, the zoogloea that is formed by multiple microorganism reaches the aggregate of forming with its adsorbed organic matter and inorganics, except containing a large amount of moisture content (can up to 99%), also contain the organism, the salt that are difficult to degrade, and pathogenic micro-organism and parasitic ovum etc., the organic content height of mud, very easily corrupt, and generation stench, in the municipal sewage treatment process, bacterium and most of Parasites are deposited in the mud, and virus can be adsorbed on the particle in the sewage, also deposit in the mud with the precipitation of particle.The every gram of the quantity of pathogenic bacteria is in hundred million in the undigested mud, and these microorganisms comprise: colibacillus, large intestine caprophyl, streptococcus faecium, phage, Salmonellas, dysentery Pseudomonas, verdigris color utmost point hair bacillus, parasitic ovum/larva, roundworm, whipworm, colony whipworm, bow roundworm, Hymenoptera larva, enterovirus etc.
Do not handle discharging arbitrarily if mud does not add, can cause serious pollution to environment.Country variant has been taked different processing modes to mud.Treatment process is filled out sea, landfill, burning substantially.Wherein fill out the sea owing to serious pollution problem occurred, forbidden by International Law of the Sea that each state all abrogates basically.Remaining several disposal options respectively have quality.From technical difficulty relatively, the technical difficulty of landfill is minimum, and what difficulty was the highest is to burn.From cost of investment, the input cost of burning is the highest, secondly is landfill.And coming comparison from environmental risk, there are the risk of tail gas and groundwater pollution respectively in burning and landfill.
On the other hand, present circular fluid bed all is that the coal with particle diameter≤13mm is fuel, when circular fluid bed moves, the coal of particle diameter＜3mm is often namely taken out of the combustion chamber by flue gas without fully burning, and because particle diameter is little, quality is light, and cyclonic separator can't separate, and directly discharges boiler with flue gas.Above-mentioned phenomenon is referred to as the loss of boiler elutriation usually, also is the high major cause of carbon content in the boiler fly ash.
How the coal of particle diameter＜3mm in the boiler oil coal and mud are made into propellant combination and use, namely realize the recycling treatment utilization of mud, can reduce the loss of boiler elutriation again, improve boiler oil burning of coal efficient, still be not reported so far.
Summary of the invention
Utilize the weak point of technology at the sludge treatment that produces in present waste water, the sewage treatment process, the object of the present invention is to provide a kind of sludge coal propellant combination.
Another purpose of the present invention is to provide the using method of above-mentioned sludge coal propellant combination.
For achieving the above object, sludge coal propellant combination provided by the invention, wherein, the ratio of mud and coal is by weight percentage: mud accounts for 50～65% of propellant combination, and coal accounts for 35～50% of propellant combination.
Described sludge coal propellant combination, wherein, described mud is the mud that sewage work handles trade effluent, municipal effluent generation; The network of drains desilting in city, the mud that river, lake, irrigation canals and ditches desilting produce.
Described sludge coal propellant combination, wherein, sewage work handle that trade effluent, municipal effluent produce mud comprise settling bowl mud, active sludge, grid slag, sand setting, sediment and scum silica frost.
Described sludge coal propellant combination, wherein, the water ratio of mud＜85%.
Described sludge coal propellant combination, wherein, the water ratio of sludge coal propellant combination＜50%.
Described sludge coal propellant combination, wherein, the particle diameter of coal is＜3mm.
The using method of sludge coal propellant combination of the present invention is that sludge coal propellant combination and boiler oil coal are sent into boiler respectively, and the add-on of sludge coal propellant combination is 20～30% of boiler oil coal total burn-off.
The using method of described sludge coal propellant combination, wherein, boiler is the circulating fluidized bed combustion coal boiler, symmetry offers sludge coal propellant combination inlet on the membrane wall of the combustion chamber of this boiler emulsion zone and combustion chamber freeboard of fluidized bed intersection portion.
The using method of described sludge coal propellant combination, wherein, sludge coal propellant combination inlet position is opened in the forward and backward or left and right of membrane wall.
The using method of described sludge coal propellant combination, wherein, sludge coal propellant combination inlet position is opened in the forward and backward or left and right of membrane wall; Sludge coal propellant combination inlet is steel tubular, and this steel pipe and termination, membrane wall junction are mounted with orifice plate, neat mouthful of steel pipe and membrane wall; This orifice plate is made for the steel plate plate, and having diameter is the circular hole of 10-20mm, 60 ° of arrangements of blossom type; The other end of steel pipe is equipped with flange, can connect with three-way change-over valve.
The using method of described sludge coal propellant combination, wherein, sludge coal propellant combination inlet is 2～4.
Description of drawings
Fig. 1 is propellant combination preparation and application schematic flow sheets;
Among the figure: 1 device for dehydrating sladge waste, 2 mud handling equipments, 3 mud storage warehouses, 4 stirrers, 5 screening plants, 6 coal handling equipments, 7 Pulverized Coal Bin, 8 connect material feed bin, 9 co-fuel delivery equipment, 10 three-way change-over valves, 11 co-fuel delivery pipelines, 12 sludge coal propellant combination inlets, 13 double fuel circular fluid beds, 14 air compressor, 15 gas-holder, 16 pipe blow-throughs, 17 reflux lines, 18 settling bowls, 19 high-pressure hydraulic pumps.
Fig. 2 is double fuel circular fluid bed synoptic diagram;
Among the figure: 12 sludge coal propellant combination inlets, 13 double fuel circular fluid beds, 20 combustion chamber emulsion zones, 21 combustion chamber freeboard of fluidized bed, 22 worm conveyors, 23 cyclonic separators, 24 transport pipes.
Embodiment
The present invention handles the mud of trade effluent, municipal effluent generation with sewage work; The network of drains desilting in city, the mud that river, lake, irrigation canals and ditches desilting produce.
The inventive method is mixed mud with the boiler oil coal, be made into the sludge coal propellant combination.
Mud of the present invention is:
(1) mud of trade effluent, municipal sewage treatment generation comprises settling bowl mud, active sludge, grid slag, sand setting, sediment and scum silica frost etc.
(2) the network of drains desilting in city, the mud that river, lake, irrigation canals and ditches desilting produce.
The device that the making of sludge coal propellant combination and application art adopt mainly partly is made up of device for dehydrating sladge waste, mud handling equipment, mud storage warehouse, screening plant, coal handling equipment, Pulverized Coal Bin, stirrer, the feed bin that connects material, co-fuel delivery equipment, three-way change-over valve, co-fuel delivery pipeline, double fuel circular fluid bed, sludge coal propellant combination inlet, air compressor, gas-holder, pipe blow-through, high-pressure hydraulic pump, reflux line, settling bowl etc.
Before the sludge coal propellant combination is made, need chemically examine mud and coal, compositions such as the water ratio of check mud and coal, calorific value so that when making propellant combination, are determined the mud that adds and ratio and the quantity of coal.The ratio of mud and coal is by weight percentage: mud accounts for 50～65% of propellant combination, and coal accounts for 35～50% of propellant combination, water ratio＜50% of the sludge coal propellant combination of making.
Adopt device for dehydrating sladge waste to dewater in mud, the water ratio of mud is dropped to＜85%, dehydration equipment can adopt centrifugal drier, pressure filter etc., mud after the dehydration is transported in the mud storage warehouse by the mud handling equipment and stores, mud storage warehouse and two mud handling equipments link, wherein one one is used for carrying mud to the mud storage warehouse, another one is used for the mud in the mud storage warehouse is transported to stirrer, and the mud handling equipment can adopt worm conveyor, spiral pump or ram pump etc.
Adopt screening plant to sieve in the boiler oil coal, particle diameter＜3mm screen is branched away, be transported in the Pulverized Coal Bin by the coal handling equipment and store.Pulverized Coal Bin and two e Foerderanlages link, and wherein one one is used for the coal after the screening is transported to Pulverized Coal Bin, and another one is used for the coal in the Pulverized Coal Bin is transported to stirrer; Screening plant can adopt vibratory screening apparatus or trommel screen.The coal handling equipment can adopt rotary conveyor, pneumatic conveyor, worm conveyor.
Mud and coal be transported in the stirrer according to the ratio of determining and quantity mix, make the sludge coal propellant combination.The sludge coal propellant combination of making is discharged to the feed bin that connects material that is positioned at the stirrer below.Co-fuel delivery equipment opening for feed is connected with the feed bin that connects material, and co-fuel delivery equipment discharge port is connected with the sludge coal propellant combination inlet of double fuel circular fluid bed by the co-fuel delivery pipeline; The feed bin that connects material is known equipment (as Germany general thatch maistre Putzmeister PAT company product).Propellant combination pipe ends between the sludge coal propellant combination inlet of co-fuel delivery equipment and double fuel circular fluid bed respectively is equipped with three-way change-over valve, connects with pipe blow-through at the central exit of co-fuel delivery pipeline near the three-way change-over valve of co-fuel delivery equipment one end installation; Connect with reflux line at the central exit of co-fuel delivery pipeline near the three-way change-over valve of the sludge coal propellant combination inlet one end installation of double fuel circular fluid bed.Co-fuel delivery equipment can adopt ram pump or spiral pump.The add-on of sludge coal propellant combination is 20～30% of boiler oil coal total burn-off.
Aforesaid device is known equipment, characteristics of the present invention are that symmetry is opened 2～4, the hole of diameter 56～160mm on the forward and backward or left and right membrane wall of the combustion chamber of circulating fluidized bed combustion coal boiler emulsion zone and freeboard of fluidized bed intersection portion, 2～4 sludge coal propellant combination inlet is installed, the circulating fluidized bed combustion coal boiler improvement is become to use the double fuel circular fluid bed of bunker coal and sludge coal propellant combination.Sludge coal propellant combination inlet is by diameter 50～150mm, the high temperature resistant stainless steel pipe of long 500mm is made, the port of steel pipe one termination is welded with orifice plate, this termination is installed in the perforate of membrane wall, stretch into the burning in circulating fluid bed boiler chamber, but the termination does not lean out outside the membrane wall, with neat mouthful of membrane wall, in the about welding of membrane wall.The orifice plate of steel tube head welding is made by the high temperature resistant stainless steel plate punching press of wall thickness 10mm, and orifice plate is covered with the circular hole of aperture ￠ 10-20mm, 60 ° of arrangements of blossom type; The other end that sludge coal propellant combination inlet steel pipe stretches out circulating fluidized bed combustion coal boiler insulation layer outside is equipped with flange, connects with three-way change-over valve.
When the improved double fuel circular fluid bed of the present invention moved, the boiler oil coal was the main fuel of double fuel circular fluid bed, and the sludge coal propellant combination is the auxiliary fuel of double fuel circular fluid bed.Sludge coal propellant combination add-on is 20～30% of double fuel circulating fluidized bed boiler fuel coal total burn-off; The boiler oil coal is sent into the emulsion zone internal combustion of double fuel burning in circulating fluid bed boiler chamber by worm conveyor; The sludge coal propellant combination is sent into the burner hearth internal combustion by mixed fuel hauling equipment, mixed fuel tube by the sludge coal propellant combination inlet of double fuel circular fluid bed.The sludge coal propellant combination forms poly-bulk after entering the combustion chamber by sludge coal propellant combination inlet, and the temperature of combustion chamber is 850～950 ℃, and the moisture that enters the poly-group surface in the combustion chamber volatilizees rapidly, and simultaneously, poly-group surface takes fire; In poly-group burning decline process, the inner moisture of poly-group is heated and sharply expands, and causes explosion Cheng Xiaoju group of poly-group; Little poly-group is heated after the burning, the poly-group of explosion Cheng Gengxiao again.At this moment, the poly-group of the sludge coal propellant combination of double fuel burning in circulating fluid bed boiler chamber freeboard of fluidized bed belongs to large size, low-density particles, and combustion chamber emulsion zone bed material belongs to small size, high density granular, therefore, the apparent density of combustion chamber emulsion zone is far longer than the apparent density of combustion chamber freeboard of fluidized bed, cause the poly-group of coking burning can't fall into combustion chamber emulsion zone burning, but " floating " suspension combustion on the emulsion zone of combustion chamber, prolonged the residence time of the poly-group of sludge coal propellant combination at the combustion chamber freeboard of fluidized bed, increased the combustion share of combustion chamber freeboard of fluidized bed, after the cyclonic separator that unburnt poly-group is installed by the outlet of double fuel burning in circulating fluid bed boiler chamber is separated from flue gas, again carry back by transport pipe that the double fuel burning in circulating fluid bed boiler is indoor to burn away, circulate repeatedly till after-flame, the flying dust that the poly-group of sludge coal propellant combination burning back produces is discharged with flue gas.In order to prevent sludge coal propellant combination discharge of noxious gases in combustion processes, in the boiler exhaust gas system, adopt the flue gas treatment facility, handle and remove smoke in objectionable impurities and pollutent.
When the co-fuel delivery pipeline is idle, must use pressurized air that the co-fuel delivery pipeline is cleaned.At first will be on co-fuel delivery equipment and co-fuel delivery pipeline that double fuel circular fluid bed sludge coal propellant combination inlet connects during cleaning, adjust to pipe blow-through and the connection of co-fuel delivery pipeline near the three-way change-over valve that co-fuel delivery equipment one side is installed, make co-fuel delivery equipment connect disconnection with the co-fuel delivery pipeline; The three-way change-over valve of installing on the pipe blow-through being adjusted to the gas pipe line of pipe blow-through and gas-holder connects; Starting air compressor inflates in gas-holder, pressurized air in the gas-holder enters in the co-fuel delivery pipeline by gas pipe line, three-way change-over valve, pipe blow-through, and the sludge coal propellant combination in the co-fuel delivery pipeline is purged under compressed-air actuated effect and enters in the double fuel circular fluid bed.
After using pressurized air cleaning co-fuel delivery pipeline, the three-way change-over valve of co-fuel delivery pipeline and the installation of double fuel circular fluid bed sludge coal propellant combination inlet is adjusted into co-fuel delivery pipeline and reflux line connection, the three-way change-over valve of installing on the pipe blow-through is adjusted into pipe blow-through and high-pressure hydraulic pump connection, start high-pressure hydraulic pump water is passed through three-way change-over valve, pipe blow-through enters in the co-fuel delivery pipeline, and the sludge coal propellant combination residue in the co-fuel delivery pipeline is installed three-way change-over valve by the co-fuel delivery pipeline under the effect of High-Pressure Water, reflux line is washed in the settling bowl.
The invention will be further described below in conjunction with Fig. 1 and Fig. 2 and embodiment:
Before the sludge coal propellant combination is made, need chemically examine mud and coal, compositions such as the moisture of check mud and coal, calorific value so that when making the sludge coal propellant combination, are determined the mud that adds and ratio and the quantity of coal.The ratio of mud and coal is by weight percentage: mud accounts for 50～65% of sludge coal propellant combination composition, and coal accounts for 35～50% of sludge coal propellant combination composition, water ratio＜50% of the sludge coal propellant combination of making.
Adopt device for dehydrating sladge waste 1 to dewater in mud, the water ratio of mud is dropped to＜85%, dehydration equipment 1 can adopt centrifugal drier, pressure filter etc., mud after the dehydration is transported to storage in the mud storage warehouse 3 by mud handling equipment 2, mud storage warehouse 3 and two mud handling equipments 2 link, wherein one one is used for carrying mud to mud storage warehouse 3, another one is used for the mud in the mud storage warehouse 3 is transported to stirrer 4, and mud handling equipment 2 can adopt worm conveyor, spiral pump or ram pump etc.
Adopt screening plant 5 to sieve in the boiler oil coal, particle diameter＜3mm screen is branched away, be transported to storage in the Pulverized Coal Bin 7 by coal handling equipment 6.Pulverized Coal Bin 7 and two coal handling equipments 6 link, and wherein one one is used for the coal after the screening is transported to Pulverized Coal Bin 7, and another one is used for the coal in the Pulverized Coal Bin 7 is transported to stirrer 4; Screening plant 5 can adopt vibratory screening apparatus or trommel screen.Coal handling equipment 6 can adopt rotary conveyor, pneumatic conveyor, worm conveyor.
Mud and coal be transported in the stirrer 4 according to the ratio of determining and quantity mix, make the sludge coal propellant combination.The sludge coal propellant combination of making is discharged to the feed bin 8 that connects material that is positioned at stirrer 4 belows; Co-fuel delivery equipment 9 opening for feeds are connected with the feed bin 8 that connects material, and co-fuel delivery equipment 9 discharge ports are connected with the sludge coal propellant combination inlet 12 of double fuel circular fluid bed 13 by co-fuel delivery pipeline 11; The feed bin 8 that connects material is known equipment (as Germany general thatch maistre Putzmeister PAT company product).Co-fuel delivery pipeline 11 two ends between the sludge coal propellant combination inlet 12 of co-fuel delivery equipment 9 and double fuel circular fluid bed 13 respectively are equipped with three-way change-over valve 10, connect with pipe blow-through 15 at the central exit of co-fuel delivery pipeline 11 near the three-way change-over valve 10 of co-fuel delivery equipment 9 one ends installation; Connect with reflux line 17 at the central exit of co-fuel delivery pipeline 11 near the three-way change-over valve 10 of the sludge coal propellant combination inlet 12 1 ends installation of double fuel circular fluid bed 13.Co-fuel delivery equipment 9 can adopt ram pump or spiral pump.The add-on of sludge coal propellant combination is the 20-30% of boiler oil coal total burn-off.
Symmetry is opened 2～4, the hole of diameter 56～160mm on the forward and backward or left and right membrane wall of the combustion chamber of circulating fluidized bed combustion coal boiler emulsion zone 21 and freeboard of fluidized bed 22 intersection portions, 2～4 sludge coal propellant combination inlet 12 is installed, the circulating fluidized bed combustion coal boiler improvement is become to use the double fuel circular fluid bed 13 of bunker coal and sludge coal propellant combination.Sludge coal propellant combination inlet is by diameter 50～150mm, the high temperature resistant stainless steel pipe of long 500mm is made, the port that steel pipe welds a termination is welded with orifice plate, this termination is installed in the perforate of membrane wall, stretch into the burning in circulating fluid bed boiler chamber, but the termination does not lean out outside the membrane wall, with neat mouthful of membrane wall, in the about welding of membrane wall.The orifice plate of steel pipe port welding is made by the high temperature resistant stainless steel plate punching press of wall thickness 10mm, and orifice plate is covered with the circular hole of aperture ￠ 10-20mm, 60 ° of arrangements of blossom type, becomes the mesh-like steel plate; The other end that sludge coal propellant combination inlet steel pipe stretches out circulating fluidized bed combustion coal boiler insulation layer outside is equipped with flange, connects with three-way change-over valve 10.
During 13 operations of double fuel circular fluid bed, the boiler oil coal is the main fuel of double fuel circular fluid bed 13, and the sludge coal propellant combination is the auxiliary fuel of double fuel circular fluid bed 13.The combustion chamber emulsion zone 20 that the boiler oil coal is sent into double fuel circular fluid bed 13 by worm conveyor 22 burns, and the sludge coal propellant combination is sent into double fuel circular fluid bed 13 internal combustion by the sludge coal propellant combination inlet 12 of mixed fuel hauling equipment 9, mixed fuel tube 11 and double fuel circular fluid bed 13.The sludge coal propellant combination forms poly-bulk enter the combustion chamber of double fuel circular fluid bed 13 by sludge coal propellant combination inlet 12 after, the temperature of combustion chamber is 850-950 ℃, the moisture that enters the poly-group surface in double fuel circular fluid bed 13 combustion chambers volatilizees rapidly, simultaneously, a poly-surface takes fire; In poly-group burning decline process, the inner moisture of poly-group is heated and sharply expands, and causes explosion Cheng Xiaoju group of poly-group; Little poly-group is heated after the burning, the poly-group of explosion Cheng Gengxiao again.At this moment, the poly-group of the sludge coal propellant combination of double fuel circular fluid bed 13 combustion chamber freeboard of fluidized bed belongs to large size, low-density particles, and combustion chamber emulsion zone bed material belongs to small size, high density granular, therefore, the apparent density of combustion chamber emulsion zone is far longer than the apparent density of combustion chamber freeboard of fluidized bed, cause the poly-group of coking burning can't fall into combustion chamber emulsion zone burning, but " floating " suspension combustion on the emulsion zone of combustion chamber, prolonged the residence time of the poly-group of sludge coal propellant combination at the combustion chamber freeboard of fluidized bed, increased the combustion share of combustion chamber freeboard of fluidized bed, after the cyclonic separator 23 that unburnt poly-group is installed by double fuel circular fluid bed 13 combustor exit places is separated from flue gas, again carry back in double fuel circular fluid bed 13 combustion chambers by transport pipe 24 and to burn away, circulate repeatedly till after-flame, the flying dust that the poly-group of sludge coal propellant combination burning back produces is discharged with flue gas.In order to prevent sludge coal propellant combination discharge of noxious gases in combustion processes, in the boiler exhaust gas system, adopt the flue gas treatment facility, handle and remove smoke in objectionable impurities and pollutent.
When leaving unused, must use in co-fuel delivery pipeline 11 pressurized air that co-fuel delivery pipe 11 roads are cleaned.At first will be on co-fuel delivery equipment 9 and co-fuel delivery pipeline 9 that the sludge coal propellant combination inlet 12 of double fuel circular fluid bed 13 connects during cleaning, change 10 valves near the threeway of co-fuel delivery equipment 9 one sides installation and adjust to pipe blow-through 16 and 11 connections of co-fuel delivery pipeline, co-fuel delivery equipment 9 and co-fuel delivery pipe link are disconnected; The three-way change-over valve of installing on the pipe blow-through 16 10 is adjusted to pipe blow-through 16 to be connected with the gas pipe line of gas-holder 15; Starting air compressor 14 inflates in gas-holder 15, pressurized air in the gas-holder 15 enters in the co-fuel delivery pipeline 9 by gas pipe line, three-way change-over valve 10, pipe blow-through 16, and the sludge coal propellant combination in the co-fuel delivery pipeline 9 is purged under compressed-air actuated effect and enters in the double fuel circular fluid bed 13.
After using pressurized air cleaning co-fuel delivery pipeline 11, the three-way change-over valve 10 that co-fuel delivery pipeline 11 and the sludge coal propellant combination inlet 12 of double fuel circular fluid bed 13 are installed is adjusted into co-fuel delivery pipeline 11 and reflux line 17 connections, the three-way change-over valve of installing on the pipe blow-through 16 10 is adjusted into pipe blow-through 16 to be connected with high-pressure hydraulic pump 19, start high-pressure hydraulic pump 19 water is passed through three-way change-over valve 10, pipe blow-through 16 enters in the co-fuel delivery pipeline 11, and the sludge coal propellant combination residue in the co-fuel delivery pipeline 11 is installed three-way change-over valve 10 by co-fuel delivery pipeline 11 under the effect of High-Pressure Water, reflux line 17 is washed in the settling bowl 18.
Below by the boiler propellant combination being made the example of having implemented two kinds of different conditions with application process.
Embodiment 1:
Certain papermaking company is in adopting biochemical process art breading paper waste process, produce 10 tons in the settling bowl waste of 60 tons in the mud of water content 98% and water content 80% every day, there is 3 in 75 tons/h of steam output circulating fluidized bed combustion coal boiler in company, and every day, the consume fuel coal was more than 800 ton.Adopt the present invention that mud and settling bowl waste adding coal dust are made into the sludge coal propellant combination, as the auxiliary fuel of the double fuel circular fluid bed 13 that is become by the circulating fluidized bed combustion coal boiler improvement.
Before propellant combination is made, need chemically examine mud and coal, compositions such as the moisture of check mud and coal, calorific value so that when making the sludge coal propellant combination, are determined the mud that adds and ratio and the quantity of coal.The ratio of mud and coal is by weight percentage: mud and settling bowl waste account for 50% of sludge coal propellant combination composition, and coal accounts for 50% of sludge coal propellant combination composition, water ratio＜50% of the sludge coal propellant combination of making.
Adopt device for dehydrating sladge waste 1 to dewater in mud, make the water ratio of mud drop to 85%, dehydration equipment 1 adopts centrifugal drier, mud after the dehydration is transported to storage in the mud storage warehouse 3 by mud handling equipment 2, mud storage warehouse 3 and two mud handling equipments 2 link, wherein one one is used for carrying mud to mud storage warehouse 3, and another one is used for the mud in the mud storage warehouse 3 is transported to stirrer 4, and mud handling equipment 2 adopts spiral pump.
Adopt screening plant 5 to sieve in the boiler oil coal, particle diameter＜3mm screen is branched away, be transported to storage in the Pulverized Coal Bin 7 by coal handling equipment 6.Pulverized Coal Bin 7 and two coal handling equipments 6 link, and wherein an employing rotary conveyor is used for the coal after the screening is transported to Pulverized Coal Bin 7, and another one adopts worm conveyor, is used for the coal in the Pulverized Coal Bin 7 is transported to stirrer 4; Screening plant 5 adopts vibratory screening apparatus.
Mud and coal be transported in the stirrer 4 according to the ratio of determining and quantity mix, make the sludge coal propellant combination.The sludge coal propellant combination of making is discharged to the feed bin 8 that connects material that is positioned at stirrer 4 belows; Co-fuel delivery equipment 9 opening for feeds are connected with the feed bin 8 that connects material, and co-fuel delivery equipment 9 discharge ports are connected with the sludge coal propellant combination inlet 12 of double fuel circular fluid bed 13 by co-fuel delivery pipeline 11; The feed bin 8 that connects material is known equipment (as Germany general thatch maistre Putzmeister PAT company product).Co-fuel delivery pipeline 11 two ends between the sludge coal propellant combination inlet 12 of co-fuel delivery equipment (9) and double fuel circular fluid bed 13 respectively are equipped with three-way change-over valve 10, connect with pipe blow-through 15 at the central exit of co-fuel delivery pipeline 11 near the three-way change-over valve 10 of co-fuel delivery equipment 9 one ends installation; Connect with reflux line 17 at the central exit of co-fuel delivery pipeline 11 near the three-way change-over valve 10 of the sludge coal propellant combination inlet 12 1 ends installation of double fuel circular fluid bed 13.Co-fuel delivery equipment 9 adopts ram pump.The add-on of sludge coal propellant combination is 30% of boiler oil coal total burn-off.
Symmetry is opened 2, the hole of diameter 160mm on the forward and backward or left and right membrane wall of the combustion chamber of circulating fluidized bed combustion coal boiler emulsion zone 21 and freeboard of fluidized bed 22 intersection portions, 2 sludge coal propellant combination inlet 12 is installed, the circulating fluidized bed combustion coal boiler improvement is become to use the double fuel circular fluid bed 13 of bunker coal and sludge coal propellant combination.Sludge coal propellant combination inlet is by diameter 150mm, the high temperature resistant stainless steel pipe of long 500mm is made, the end that steel pipe is welded with orifice plate is installed in the perforate of membrane wall, stretch into the burning in circulating fluid bed boiler chamber, but the termination does not lean out outside the membrane wall, with neat mouthful of membrane wall, in the about welding of membrane wall.The orifice plate of steel tube head welding is made by the high temperature resistant stainless steel plate punching press of wall thickness 10mm, and orifice plate is covered with the circular hole of aperture ￠ 20mm, 60 ° of arrangements of blossom type; The other end that sludge coal propellant combination inlet steel pipe stretches out circulating fluidized bed combustion coal boiler insulation layer outside is equipped with flange, connects with three-way change-over valve 10.
During 13 operations of double fuel circular fluid bed, the boiler oil coal is the main fuel of double fuel circular fluid bed 13, and the sludge coal propellant combination is the auxiliary fuel of double fuel circular fluid bed 13.Sludge coal propellant combination add-on is the 5-50% of double fuel circular fluid bed 13 bunker coal add-ons; The combustion chamber emulsion zone 20 that the boiler oil coal is sent into double fuel circular fluid bed 13 by worm conveyor 22 burns, and the sludge coal propellant combination is sent into double fuel circular fluid bed internal combustion by the sludge coal propellant combination inlet 12 of mixed fuel hauling equipment 9, mixed fuel tube 11 and double fuel circular fluid bed 13.The sludge coal propellant combination forms poly-bulk after entering the combustion chamber by sludge coal propellant combination inlet 12, and the temperature of combustion chamber is 850-950 ℃, and the moisture that enters the poly-group surface in the combustion chamber volatilizees rapidly, and simultaneously, poly-group surface takes fire; In poly-group burning decline process, the inner moisture of poly-group is heated and sharply expands, and causes explosion Cheng Xiaoju group of poly-group; Little poly-group is heated after the burning, the poly-group of explosion Cheng Gengxiao again.At this moment, the poly-group of the sludge coal propellant combination of double fuel circular fluid bed 13 combustion chamber freeboard of fluidized bed belongs to large size, low-density particles, and combustion chamber emulsion zone bed material belongs to small size, high density granular, therefore, the apparent density of combustion chamber emulsion zone is far longer than the apparent density of combustion chamber freeboard of fluidized bed, cause the poly-group of coking burning can't fall into combustion chamber emulsion zone burning, but " floating " suspension combustion on the emulsion zone of combustion chamber, prolonged the residence time of the poly-group of sludge coal propellant combination at the combustion chamber freeboard of fluidized bed, increased the combustion share of combustion chamber freeboard of fluidized bed, after the cyclonic separator 23 that unburnt poly-group is installed by double fuel circular fluid bed 13 combustor exit places is separated from flue gas, again carry back in double fuel circular fluid bed 13 combustion chambers by transport pipe 24 and to burn away, circulate repeatedly till after-flame, the flying dust that the poly-group of sludge coal propellant combination burning back produces is discharged with flue gas.In order to prevent sludge coal propellant combination discharge of noxious gases in combustion processes, in the boiler exhaust gas system, adopt the flue gas treatment facility, handle and remove smoke in objectionable impurities and pollutent.
When leaving unused, must use in co-fuel delivery pipeline 11 pressurized air that co-fuel delivery pipe 11 roads are cleaned.At first will be on co-fuel delivery equipment 9 and co-fuel delivery pipeline 9 that the sludge coal propellant combination inlet 12 of double fuel circular fluid bed 13 connects during cleaning, change 10 valves near the threeway of co-fuel delivery equipment 9 one sides installation and adjust to pipe blow-through 16 and 11 connections of co-fuel delivery pipeline, co-fuel delivery equipment 9 and co-fuel delivery pipe link are disconnected; The three-way change-over valve of installing on the pipe blow-through 16 10 is adjusted to pipe blow-through 16 to be connected with the gas pipe line of gas-holder 15; Starting air compressor 14 inflates in gas-holder 15, pressurized air in the gas-holder 15 enters in the co-fuel delivery pipeline 9 by gas pipe line, three-way change-over valve 10, pipe blow-through 16, and the sludge coal propellant combination in the co-fuel delivery pipeline 9 is purged under compressed-air actuated effect and enters in the double fuel circular fluid bed 13.
After using pressurized air cleaning co-fuel delivery pipeline 11, the three-way change-over valve 10 that co-fuel delivery pipeline 11 and the sludge coal propellant combination inlet 12 of double fuel circular fluid bed 13 are installed is adjusted into co-fuel delivery pipeline 11 and reflux line 17 connections, the three-way change-over valve of installing on the pipe blow-through 16 10 is adjusted into pipe blow-through 16 to be connected with high-pressure hydraulic pump 19, start high-pressure hydraulic pump 19 water is passed through three-way change-over valve 10, pipe blow-through 16 enters in the co-fuel delivery pipeline 11, and the sludge coal propellant combination residue in the co-fuel delivery pipeline 11 is installed three-way change-over valve 10 by co-fuel delivery pipeline 11 under the effect of High-Pressure Water, reflux line 17 is washed in the settling bowl 18.
Table 1 is the forward and backward comparison of separate unit boiler combustion sludge coal propellant combination:
Embodiment 2:
Certain municipal sewage plant is in adopting A/A/O Process for Treating Municipal process, produce 20 tons in the mud of water content 98% every day, the sewage work next door is a tame heat power plant, 3 in 130 tons of circulating fluidized bed combustion coal boilers are arranged, every day, the consume fuel coal 1, more than 400 ton, adopt the present invention that mud and settling bowl waste adding coal dust are made into the sludge coal propellant combination, with the double fuel circulating fluidized bed combustion coal boiler that the circulating fluidized bed combustion coal boiler improvement becomes, the sludge coal propellant combination is as the auxiliary fuel of double fuel circulating fluidized bed combustion coal boiler.
Before the sludge coal propellant combination is made, need chemically examine mud and coal, compositions such as the moisture of check mud and coal, calorific value so that when making the sludge coal propellant combination, are determined the mud that adds and ratio and the quantity of coal.The ratio of mud and coal is by weight percentage: mud accounts for 65% of sludge coal propellant combination composition, and coal accounts for 35% of sludge coal propellant combination composition.Water ratio＜50% of the sludge coal propellant combination of making.
Adopt device for dehydrating sladge waste 1 to dewater in mud, the water ratio of mud is dropped to＜80%, dehydration equipment 1 adopts pressure filter, mud after the dehydration is transported to storage in the mud storage warehouse 3 by mud handling equipment 2, mud storage warehouse 3 and two mud handling equipments 2 link, wherein one one is used for carrying mud to mud storage warehouse 3, and another one is used for the mud in the mud storage warehouse 3 is transported to stirrer 4, and mud handling equipment 2 adopts ram pump.
Adopt screening plant 5 to sieve in the boiler oil coal, particle diameter＜3mm screen is branched away, be transported to storage in the Pulverized Coal Bin 7 by coal handling equipment 6.Pulverized Coal Bin 7 and two coal handling equipments 6 link, and wherein an employing pneumatic conveyor is used for the coal after the screening is transported to Pulverized Coal Bin 7, and another one adopts worm conveyor, is used for the coal in the Pulverized Coal Bin 7 is transported to stirrer 4; Screening plant 5 adopts trommel screen.
Mud and coal be transported in the stirrer 4 according to the ratio of determining and quantity mix, make the sludge coal propellant combination.The sludge coal propellant combination of making is discharged to the feed bin 8 that connects material that is positioned at stirrer 4 belows; Co-fuel delivery equipment 9 opening for feeds are connected with the feed bin 8 that connects material, and co-fuel delivery equipment 9 discharge ports are connected with the sludge coal propellant combination inlet 12 of double fuel circular fluid bed 13 by co-fuel delivery pipeline 11; The feed bin 8 that connects material is known equipment (as Germany general thatch maistre Putzmeister PAT company product).Co-fuel delivery pipeline (11) two ends between the sludge coal propellant combination inlet 12 of co-fuel delivery equipment 9 and double fuel circular fluid bed 13 respectively are equipped with three-way change-over valve 10, connect with pipe blow-through 15 at the central exit of co-fuel delivery pipeline 11 near the three-way change-over valve 10 of co-fuel delivery equipment 9 one ends installation; Connect with reflux line 17 at the central exit of co-fuel delivery pipeline 11 near the three-way change-over valve 10 of the sludge coal propellant combination inlet 12 1 ends installation of double fuel circular fluid bed 13.Co-fuel delivery equipment 9 can adopt ram pump or spiral pump.The add-on of sludge coal propellant combination is 20% of boiler oil coal total burn-off.
Symmetry is opened 4, the hole of diameter 56mm on the front, rear, left and right membrane wall of the combustion chamber of circulating fluidized bed combustion coal boiler emulsion zone 21 and freeboard of fluidized bed 22 intersection portions, 4 sludge coal propellant combination inlet 12 is installed, the circulating fluidized bed combustion coal boiler improvement is become to use the double fuel circular fluid bed 13 of bunker coal and sludge coal propellant combination.Sludge coal propellant combination inlet is by diameter 50mm, and the high temperature resistant stainless steel pipe of long 500mm is made, and the end that steel pipe is welded with orifice plate is installed in the perforate of membrane wall, stretch into the burning in circulating fluid bed boiler chamber, but the termination does not lean out outside the membrane wall, with neat mouthful of membrane wall, in the about welding of membrane wall.The orifice plate of steel tube head welding is made by the high temperature resistant stainless steel plate punching press of wall thickness 10mm, and orifice plate is covered with the circular hole of aperture ￠ 10mm, 60 ° of arrangements of blossom type; The other end that sludge coal propellant combination inlet steel pipe stretches out circulating fluidized bed combustion coal boiler insulation layer outside is equipped with flange, connects with three-way change-over valve 10.
During 13 operations of double fuel circular fluid bed, the boiler oil coal is the main fuel of double fuel circular fluid bed 13, and the sludge coal propellant combination is the auxiliary fuel of double fuel circular fluid bed 13.Sludge coal propellant combination add-on is the 5-50% of double fuel circular fluid bed 13 bunker coal add-ons; The combustion chamber emulsion zone 20 that the boiler oil coal is sent into double fuel circular fluid bed 13 by worm conveyor 22 burns, and the sludge coal propellant combination is sent into double fuel circular fluid bed internal combustion by the sludge coal propellant combination inlet 12 of mixed fuel hauling equipment 9, mixed fuel tube 11 and double fuel circular fluid bed 13.The sludge coal propellant combination forms poly-bulk after entering the combustion chamber by sludge coal propellant combination inlet 12, and the temperature of combustion chamber is 850-950 ℃, and the moisture that enters the poly-group surface in the combustion chamber volatilizees rapidly, and simultaneously, poly-group surface takes fire; In poly-group burning decline process, the inner moisture of poly-group is heated and sharply expands, and causes explosion Cheng Xiaoju group of poly-group; Little poly-group is heated after the burning, the poly-group of explosion Cheng Gengxiao again.At this moment, the poly-group of the sludge coal propellant combination of double fuel circular fluid bed 13 combustion chamber freeboard of fluidized bed belongs to large size, low-density particles, and combustion chamber emulsion zone bed material belongs to small size, high density granular, therefore, the apparent density of combustion chamber emulsion zone is far longer than the apparent density of combustion chamber freeboard of fluidized bed, cause the poly-group of coking burning can't fall into combustion chamber emulsion zone burning, but " floating " suspension combustion on the emulsion zone of combustion chamber, prolonged the residence time of the poly-group of sludge coal propellant combination at the combustion chamber freeboard of fluidized bed, increased the combustion share of combustion chamber freeboard of fluidized bed, after the cyclonic separator 23 that unburnt poly-group is installed by double fuel circular fluid bed 13 combustor exit places is separated from flue gas, again carry back in double fuel circular fluid bed 13 combustion chambers by transport pipe 24 and to burn away, circulate repeatedly till after-flame, the flying dust that the poly-group of sludge coal propellant combination burning back produces is discharged with flue gas.In order to prevent sludge coal propellant combination discharge of noxious gases in combustion processes, in the boiler exhaust gas system, adopt the flue gas treatment facility, handle and remove smoke in objectionable impurities and pollutent.
When leaving unused, must use in co-fuel delivery pipeline 11 pressurized air that co-fuel delivery pipe 11 roads are cleaned.At first will be on co-fuel delivery equipment 9 and co-fuel delivery pipeline 9 that the sludge coal propellant combination inlet 12 of double fuel circular fluid bed 13 connects during cleaning, change 10 valves near the threeway of co-fuel delivery equipment 9 one sides installation and adjust to pipe blow-through 16 and 11 connections of co-fuel delivery pipeline, co-fuel delivery equipment 9 and co-fuel delivery pipe link are disconnected; The three-way change-over valve of installing on the pipe blow-through 16 10 is adjusted to pipe blow-through 16 to be connected with the gas pipe line of gas-holder 15; Starting air compressor 14 inflates in gas-holder 15, pressurized air in the gas-holder 15 enters in the co-fuel delivery pipeline 9 by gas pipe line, three-way change-over valve 10, pipe blow-through 16, and the sludge coal propellant combination in the co-fuel delivery pipeline 9 is purged under compressed-air actuated effect and enters in the double fuel circular fluid bed 13.
After using pressurized air cleaning co-fuel delivery pipeline 11, the three-way change-over valve 10 that co-fuel delivery pipeline 11 and the sludge coal propellant combination inlet 12 of double fuel circular fluid bed 13 are installed is adjusted into co-fuel delivery pipeline 11 and reflux line 17 connections, the three-way change-over valve of installing on the pipe blow-through 16 10 is adjusted into pipe blow-through 16 to be connected with high-pressure hydraulic pump 19, start high-pressure hydraulic pump 19 water is passed through three-way change-over valve 10, pipe blow-through 16 enters in the co-fuel delivery pipeline 11, and the sludge coal propellant combination residue in the co-fuel delivery pipeline 11 is installed three-way change-over valve 10 by co-fuel delivery pipeline 11 under the effect of High-Pressure Water, reflux line 17 is washed in the settling bowl 18.
Table 2 is the forward and backward comparison of separate unit boiler combustion sludge coal propellant combination:
Claims (8)
1. a method of using the sludge coal propellant combination is sent sludge coal propellant combination and boiler oil coal into boiler respectively, and the add-on of sludge coal propellant combination is 20～30% of boiler oil coal total burn-off; Wherein:
Boiler is the circulating fluidized bed combustion coal boiler, and symmetry offers sludge coal propellant combination inlet on the forward and backward or left and right membrane wall of the combustion chamber of this boiler emulsion zone and combustion chamber freeboard of fluidized bed intersection portion; Sludge coal propellant combination inlet is steel pipe, and the port of this steel pipe and membrane wall junction is mounted with orifice plate, neat mouthful of steel pipe and membrane wall; This orifice plate is that steel plate is made, and has circular hole; The other end that steel pipe stretches out circulating fluidized bed combustion coal boiler insulation layer outside is equipped with flange;
The ratio of mud and coal is by weight percentage in the sludge coal propellant combination: mud accounts for 50～65% of propellant combination, and coal accounts for 35～50% of propellant combination.
2. the method for claim 1, wherein orifice plate has the circular hole that diameter is 10-20mm, 60 ° of arrangements of blossom type.
3. method as claimed in claim 1 or 2, wherein, sludge coal propellant combination inlet is 2～4.
4. the method for claim 1, wherein described mud is the mud that sewage work handles trade effluent, municipal effluent generation; The network of drains desilting in city, the mud that river, lake, irrigation canals and ditches desilting produce.
5. method as claimed in claim 4, wherein, sewage work handles the mud that trade effluent, municipal effluent produce and comprises settling bowl mud, active sludge, grid slag, sand setting, sediment and scum silica frost.
6. the method for claim 1, wherein water ratio of mud＜85%.
7. the method for claim 1, wherein water ratio of sludge coal propellant combination＜50%.
8. the method for claim 1, wherein the particle diameter of coal is＜3mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101147189A CN101191089B (en) | 2006-11-22 | 2006-11-22 | Sludge and coal mixing fuel and using method thereof |
| PCT/CN2007/002899 WO2008061430A1 (en) | 2006-11-22 | 2007-10-09 | A mixed fuel of sludge and coal and method using it |
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| CN2006101147189A CN101191089B (en) | 2006-11-22 | 2006-11-22 | Sludge and coal mixing fuel and using method thereof |
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| CN104073312A (en) * | 2013-03-29 | 2014-10-01 | 中国石油化工股份有限公司 | Composite sludge coal and preparation method thereof as well as fuel |
| CN106118792A (en) * | 2016-06-28 | 2016-11-16 | 卓宇轩 | A kind of sludge synthetic fuel and manufacture method thereof |
| CN109913642B (en) * | 2019-04-30 | 2024-04-19 | 马钢集团设计研究院有限责任公司 | Rotary hearth furnace raw material treatment system and process thereof |
| CN112574794A (en) * | 2020-11-17 | 2021-03-30 | 珠海红塔仁恒包装股份有限公司 | Treatment method of papermaking sludge |
| CN116099861A (en) * | 2022-12-27 | 2023-05-12 | 山西金鼎潞宝能源科技有限公司 | Treatment method for hazardous waste generated in coking production process |
| CN117329535A (en) * | 2023-09-28 | 2024-01-02 | 无锡惠联热电有限公司 | Pollution-doped low-nitrogen combustion system of four-corner tangential high-temperature high-pressure pulverized coal boiler |
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| CN1068847A (en) * | 1992-05-16 | 1993-02-10 | 黄石市青山湖污水净化厂 | The briquettes with sludge that utilizes biochemical sludge to make |
| CN1187528A (en) * | 1996-03-29 | 1998-07-15 | 沈阳油田实业集团 | Process for preparing briquette combustion supporting powder |
| CN1282781A (en) * | 1999-07-29 | 2001-02-07 | 中国科学院广州能源研究所 | Process for preparing briquettes with sludge |
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| EP0321308A1 (en) * | 1987-12-17 | 1989-06-21 | Cet Energy Systems Inc. | Fluidized bed furnace |
| CN1396239A (en) * | 2002-07-01 | 2003-02-12 | 黄全刚 | Additive of fuel coal and mud-type fuel coal |
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| CN1301382C (en) * | 2004-04-06 | 2007-02-21 | 张大伟 | Method for using solid/liquid coal double fuel for circulation fluidized bed boiler |
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2006
- 2006-11-22 CN CN2006101147189A patent/CN101191089B/en not_active Expired - Fee Related
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- 2007-10-09 WO PCT/CN2007/002899 patent/WO2008061430A1/en active Application Filing
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| CN1068847A (en) * | 1992-05-16 | 1993-02-10 | 黄石市青山湖污水净化厂 | The briquettes with sludge that utilizes biochemical sludge to make |
| CN1187528A (en) * | 1996-03-29 | 1998-07-15 | 沈阳油田实业集团 | Process for preparing briquette combustion supporting powder |
| CN1282781A (en) * | 1999-07-29 | 2001-02-07 | 中国科学院广州能源研究所 | Process for preparing briquettes with sludge |
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