CN107089784A - A kind of system and method for recycling sludge processing - Google Patents
A kind of system and method for recycling sludge processing Download PDFInfo
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- CN107089784A CN107089784A CN201710440798.5A CN201710440798A CN107089784A CN 107089784 A CN107089784 A CN 107089784A CN 201710440798 A CN201710440798 A CN 201710440798A CN 107089784 A CN107089784 A CN 107089784A
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- 239000010802 sludge Substances 0.000 title claims abstract description 131
- 238000004064 recycling Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 104
- 238000002309 gasification Methods 0.000 claims abstract description 50
- 238000001035 drying Methods 0.000 claims abstract description 40
- 238000011084 recovery Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000428 dust Substances 0.000 claims abstract description 27
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 27
- 239000002918 waste heat Substances 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 20
- 238000000746 purification Methods 0.000 claims abstract description 11
- 239000008234 soft water Substances 0.000 claims description 10
- 239000000567 combustion gas Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000004047 hole gas Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000010865 sewage Substances 0.000 description 8
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000009264 composting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0903—Feed preparation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
- C10J2300/0923—Sludge, e.g. from water treatment plant
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1687—Integration of gasification processes with another plant or parts within the plant with steam generation
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to environmental protection technical field; more particularly to a kind of system and method for recycling sludge processing; wherein; the system includes sludge drying unit, sludge gasification unit, high-temperature dust removal unit, high-temperature gas waste heat recovery unit, gas purification units, afterheat of slags recovery unit, unit for treating water, gas fired-boiler, saturated vapor blender, air preheater.The present invention can preferably realize the innoxious and recycling of sludge, and not produce secondary pollution, can realize sludge self energy cascade utilization, and energy consumption is low, energy efficiency is high.
Description
Technical field
The invention belongs to the system and method for environmental protection technical field, more particularly to a kind of processing of recycling sludge.
Background technology
With the steady-state growth of wastewater treatment in China scale, as sewage disposal accessory substance, sludge yield also increases therewith
Plus.Related data shows, by March, 2016, and built more than 3910 urban wastewater treatment firms of China, sewage treatment capacity has reached
To 1.67 billion cubic meters/day.As the spin-off of sewage, it is (aqueous that China produces 30,000,000 ton of -4,000 ten thousand tons of municipal sludge every year
Rate is 80%).The year two thousand twenty is expected, the municipal sludge yield of China is up to 60,000,000 ton -9,000 ten thousand tons.China grinds according to investigations
Study carefully and show, heavy metal, organic matter, bacterium and harmful microorganism in sewage etc. are most stayed in sludge, to environmental hazard pole
Greatly.Sludge is not handled, sewage disposal is almost idle work, be that pollutant makes a circle in sewage treatment plant nothing but, be gathered in dirt
In mud, it is returned in environment.According to country《" 13 " ecological environmental protection is planned》It is required that, lifting sewage regeneration and dirt
Mud intervention level, carries forward vigorously sludge stabilizing, innoxious and recycling treatment is disposed, dirty to the year two thousand twenty region and above city
Mud harmless treatment disposal rate reaches 90%, and Beijing Tianjin and Hebei Region reaches 95%.
China's specific resistance to filtration is compared with European and American developed countries compared to starting late, and existing sludge disposal technology mainly includes filling out
Bury, compost, it is agricultural, burn etc..Wherein Sludge landfill needs to take substantial amounts of land resource, meanwhile, containing substantial amounts of in sludge
Pathogenic bacteria and heavy metal, environment and underground water source can be polluted over time, and the destruction of generation is often irreversible.
The foul smell problem that sludge composting processing is only applicable to the sludge production process that the content of organic matter is high, content of beary metal is low is difficult to solve
Certainly, while sludge composting scale is limited by place.Heavy metal, pathogen and organic contamination during agricultural sludge in sludge
Thing can have undesirable effect to soil and environment, heavy metal and some persistence organic pollutants during preliminary treatment very
Hardly possible, which is decomposed, to be removed, and is accumulated in soil, soil is used for a long time ecological poisoning occurs.In addition, fertilising has seasonality, cause
Sludge needs prolonged storage, and secondary pollution problems occur again during storage.Sludge incineration cost is very high,
Disposably put into it is larger, during energy consumption it is higher, partial offset recycling sludge efficiency.In addition, in burning process there is also
Secondary pollution, can produce the high carcinogenic gas such as bioxin.Therefore specific resistance to filtration target be realize the minimizing of sludge,
Stabilisation, innoxious and recycling.Minimizing, stabilisation, innoxious it can reduce processing cost, avoid secondary pollution, resource
Recycling for organic matter and nutrient in sludge can be realized by changing.
The content of the invention
It is an object of the invention to provide a kind of system and method for recycling sludge processing, prior art is broken away to sludge
The influence and restriction of the factors such as matter, place, traffic condition, scale and environmental condition, realize the innoxious and recycling of sludge, and
And secondary pollution is not produced, sludge self energy cascade utilization can be realized, energy consumption is low, energy efficiency is high.
To reach above-mentioned purpose, the invention provides a kind of recycling sludge processing system, including sludge drying unit,
Sludge gasification unit, high-temperature dust removal unit, high-temperature gas waste heat recovery unit, gas purification units, afterheat of slags recovery unit,
Unit for treating water, gas fired-boiler, saturated vapor blender, air preheater, outlet of sewer, the fixed gas of sludge drying unit go out
Mouth is connected with unit for treating water, sludge gasification unit respectively, the gas vent of sludge gasification unit and the gas of high-temperature dust removal unit
Body entrance is connected, and the slag notch of sludge gasification unit is connected with the entrance of afterheat of slags recovery unit, the gas of high-temperature dust removal unit
Body outlet, ash hole gas access respectively with high-temperature gas waste heat recovery unit, the returning charge mouth of sludge gasification unit are connected, stove
The gas vent of slag waste heat recovery unit is connected with the air intake of air preheater, the gas vent of gas purification units and combustion
The fuel inlet of gas boiler is connected, and steam (vapor) outlet and saturated vapor blender, the sludge drying machine of gas fired-boiler are sequentially connected, water
The soft water outlet of processing unit is connected with the economizer of high-temperature gas waste heat recovery unit, the soft water entrance of gas fired-boiler.
Further, sludge drying unit includes sludge drying machine, deduster, condenser, sludge drying machine, deduster, cold
Condenser is sequentially connected by pipeline, the mud mouth of sludge drying machine, the gas outlet of condenser by conveying equipment respectively with sludge
The charging aperture and fixed gas entrance of gasification unit are connected, and the liquid outlet of condenser is connected with unit for treating water.
Further, high-temperature gas waste heat recovery unit includes superheater, evaporator, economizer, superheater, evaporator, province
Coal device passes through pipeline steam inlet respectively with sludge gasification unit, the entrance of gas purification units gas, air preheater
Steam inlet is connected.
Further, air preheater includes two preheated air outlets and a saturated vapor gas outlet, and two preheatings are empty
Air intake, the air intake of gas fired-boiler of gas outlet respectively with sludge gasification unit are connected, saturated vapor outlet and saturation
Steam mixer is connected.
Further, high-temperature dust removal unit arranges two grades of cyclone dust collectors or gravitational dust collecting device.
Present invention also offers a kind of method of recycling sludge processing, comprise the following steps：
(1) wet mud is pumped into sludge drying unit by screw rod, and dehydration is dried through sludge drying machine, produces desiccation
Sludge and waste gas, waste gas removing dust device dedusting obtain fixed gas and desiccation waste water after condenser cooling；
(2) fixed gas that sludge drying unit is produced returns to the gasification furnace progress harmless treatment of sludge gasification unit, does
Change waste water is delivered to work system circulation after unit for treating water processing and used；
(3) sludge enters sludge gasification unit and preheated air, gasification steam generation gasification reaction after desiccation, produces high temperature
Fuel gas and high-temperature ash；
(4) high-temperature combustible gas body enters high-temperature gas waste heat recovery unit and water process list after high-temperature dust removal unit dedusting
Softened water heat exchange after member processing, produces superheated steam, cools after combustion gas heat exchange；
(5) high-temperature ash enters afterheat of slags recovery unit with being discharged after air heat-exchange, and air air inlet is pre- after preheating
Hot device is further preheated；
(6) superheated steam that high-temperature gas waste heat recovery unit is produced a, part introduces sludge gasification unit and is used as gasification
Agent is used, and is partly into air preheater and is exchanged heat with preheated air, raises preheated air temperature；
(7) combustion gas enters gas fired-boiler and preheating air combustion and produced to the soft water heat supply from unit for treating water after exchanging heat
Saturated vapor, supplies sludge drying unit and enters after being mixed in saturated vapor blender with the saturated vapor from air preheat gas
Row sludge drying is used.
Further, wet mud moisture content after desiccation is down to less than 15% in step (1).
Further, gasification condition is in step (3)：800-950 DEG C of temperature, pressure 10-30kpa produces high-temperature combustible gas
900-950 DEG C of temperature, 950-1000 DEG C of high-temperature ash temperature.
Further, in step (4), produce superheated steam temperature be 450-540 DEG C, combustion gas heat exchange after greenhouse cooling extremely
170℃-250℃。
Further, step (5) is into (7), and the preheated air temperature after being preheated through afterheat of slags recovery unit is 150-300
DEG C, the air themperature further preheated through air preheater is 350-450 DEG C, the overheat that high-temperature gas waste heat recovery unit is produced
Vapor (steam) temperature is 450-540 DEG C, and the vapor (steam) temperature of saturated vapor mixed gas outlet is 160-170 DEG C.
Compared with prior art, the beneficial effects of the invention are as follows：The innoxious and recycling of sludge can be preferably realized, and
And secondary pollution is not produced, sludge self energy cascade utilization can be realized, energy consumption is low, energy efficiency is high.
Brief description of the drawings
Fig. 1 is a kind of process chart of the embodiment of method one of recycling sludge processing of the invention；
Fig. 2 is a kind of structured flowchart of the embodiment of system one of recycling sludge processing of the invention；
Fig. 3 is a kind of process chart of another embodiment of method of recycling sludge processing of the invention.
Label in figure：
1st, sludge drying machine；2nd, sludge gasification unit；3rd, high-temperature dust removal unit；4th, superheater；5th, evaporator；6th, coal is saved
Device；7th, gas purification units；8th, gas fired-boiler；9th, saturated vapor blender；10th, air preheater；11st, afterheat of slags reclaims single
Member；12nd, deduster；13rd, condenser；14th, unit for treating water.
Embodiment
The present invention is described in further detail below by specific embodiment and with reference to accompanying drawing.
Join shown in Fig. 1 to Fig. 2, present embodiments provide a kind of system of recycling sludge processing, including sludge drying list
Member, sludge gasification unit 2, high-temperature dust removal unit 3, high-temperature gas waste heat recovery unit, gas purification units 7, afterheat of slags is returned
Receive unit 11, unit for treating water 14, gas fired-boiler, saturated vapor blender 9, air preheater 10.Sludge drying unit includes
Sludge drying machine 1, deduster 12, condenser 13, are sequentially connected by pipeline, the mud mouth of sludge drying machine 1, the outlet of condenser 13
Mouth is connected with the charging aperture of sludge gasification unit 2 and fixed gas entrance respectively by conveying equipment, the liquid outlet of condenser 13 and Shui Chu
Manage unit 14 be connected, high-temperature gas waste heat recovery unit include superheater 4, evaporator 5, economizer 6, by pipeline respectively with dirt
The steam inlet of mud gasification unit 2, the gas access of gas purification units 7, the steam inlet of air preheater 10 are connected, sludge gasification list
First 2 gas vents are connected with the gas access of high-temperature dust removal unit 3, and slag notch is connected with the entrance of afterheat of slags recovery unit 11, high
The warm gas vent of dust removing units 3, ash hole respectively with the gas access of high-temperature gas waste heat recovery unit superheater 4, sludge gasification
The returning charge mouth of unit 2 is connected, and the gas vent of afterheat of slags recovery unit 11 is connected with the air intake of air preheater 10, air preheat
The outlet of the preheated air of device 10 is connected with the air intake of sludge gasification unit 2, the air intake of gas fired-boiler 8 respectively, air preheater
10 saturated vapor gas outlet be sequentially connected with saturated vapor blender 9, sludge drying machine 1, the gas vent of gas purification units 7 and
The fuel inlet of gas fired-boiler 8 is connected, and the steam (vapor) outlet of gas fired-boiler 8 is sequentially connected with saturated vapor blender 9, sludge drying machine 1,
The soft water outlet of unit for treating water 14 is connected with high-temperature gas waste heat recovery unit economizer 6, the soft water entrance of gas fired-boiler 8.
In the present embodiment, cyclone dust removal or gravitational dust collection may be selected according to treating capacity in high-temperature dust removal unit, to ensure to remove
Dirt effect is at least two-stage dedusting.
A kind of corresponding processing step of system of above-mentioned recycling sludge processing is as follows：
(1) wet mud (general moisture content is 80%) is pumped into sludge drying unit by screw rod, dry through sludge drying machine 1
Moisture content is down to less than 15% and carries out sludge gasification reaction into sludge gasification unit 2 after dry dehydration, and it is useless that drying process is produced
The dedusting of gas removing dust device 12, condenser 13 obtains fixed gas and desiccation waste water after cooling；
(2) fixed gas that sludge drying unit is produced returns to the gasification furnace of sludge gasification unit 2 and carries out harmless treatment, desiccation
Waste water is delivered to work system circulation after unit for treating water 14 is handled and used；
(3) sludge enters sludge gasification unit 2 after desiccation, in temperature：800-950 DEG C, pressure：Under the conditions of 10-30kpa with
Preheated air, a series of gasification gasification reactions of steam generation, produce high-temperature combustible gas body (900-950 DEG C) and high-temperature ash
(950-1000℃)；
(4) high-temperature combustible gas body (900-950 DEG C) sequentially enters high-temperature gas waste heat after the dedusting of high-temperature dust removal unit 3 and returned
The superheater 4, evaporator 5, economizer 6 and the softened water after the processing of unit for treating water 14 for receiving unit exchange heat, and produce superheated steam
Fuel gas temperature is dropped to (170 DEG C -250 DEG C) after (450-540 DEG C), heat exchange；
(5) (950-1000 DEG C) of high-temperature ash enters afterheat of slags recovery unit 11 with being discharged after air heat-exchange, after preheating
Air (150-300 DEG C) air inlet preheater 10 is further preheated；
(6) superheated steam (450-540 DEG C) that high-temperature gas waste heat recovery unit is produced a, part introduces sludge gasification list
Member 2 is used as gasifying agent, is partly into air preheater 10 and is exchanged heat with preheated air, is increased to preheated air temperature
350-450℃；
(7) combustion gas enters gas fired-boiler 8 after exchanging heat and preheated air (350-450 DEG C) burns to from unit for treating water 14
Soft water heat supply produce saturated vapor, after being mixed with the saturated vapor from air preheater 10 in the saturated vapor blender 9
(160-170 DEG C) supply sludge drying machine 1 carries out sludge drying and used.
Embodiment 1.
Join shown in Fig. 3, using above-mentioned technique and system, handle certain sludge of sewage treatment plant, wherein, moisture percentage in sewage sludge is
80% wet mud, is pumped to sludge drying machine by screw rod with 2.8t/h treating capacity and is changed indirectly with 160 DEG C of saturated vapor
Heat is dehydrated, and its moisture content is entered sludge gasification unit after being down to 15%, in temperature：900 DEG C, pressure：10-30kpa bars
Occur a series of gasification reactions with preheated air (450 DEG C), (450 DEG C) of gasification steam under part, produce high-temperature combustible gas body (900
DEG C) and high-temperature ash (950 DEG C).(950 DEG C) of high-temperature ash enters afterheat of slags recovery unit with being discharged after air heat-exchange, preheating
Air (300 DEG C) air inlet preheater is further preheated afterwards；High-temperature combustible gas body (900 DEG C) is after high-temperature dust removal unit dedusting
Sequentially enter the softened water after superheater, evaporator, economizer and the unit for treating water processing of high-temperature gas waste heat recovery unit
Heat exchange, produces superheated steam (450 DEG C), and a part introduces sludge gasification unit and used as gasifying agent, is partly into air
Preheater exchanges heat with preheated air, preheated air temperature is increased to 450 DEG C；Fuel gas temperature drops to (250 DEG C) entrance after heat exchange
Gas fired-boiler and preheated air (450 DEG C) burn produces saturated vapor to the soft water heat supply from unit for treating water, is steamed in saturation
Supply sludge drying machine progress sludge drying is used after being mixed in steam mixer with the saturated vapor from air preheater.
The system and method for the recycling sludge processing that the present invention is provided can preferably realize the innoxious and resource of sludge
Change, and do not produce secondary pollution, sludge self energy cascade utilization can be realized, energy consumption is low, energy efficiency is high.
Those listed above is a series of to be described in detail only for feasibility embodiment of the invention specifically
Bright, they simultaneously are not used to limit the scope of the invention, all equivalent implementations made without departing from skill spirit of the present invention
Or change should be included in the scope of the protection.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Claims (10)
1. a kind of system of recycling sludge processing, it is characterised in that including sludge drying unit, sludge gasification unit, high temperature
Dust removing units, high-temperature gas waste heat recovery unit, gas purification units, afterheat of slags recovery unit, unit for treating water, gas-fired boiler
Stove, saturated vapor blender, air preheater, the outlet of sewer of the sludge drying unit, fixed gas outlet respectively with it is described
Unit for treating water, sludge gasification unit are connected, the gas of the gas vent of the sludge gasification unit and the high-temperature dust removal unit
Body entrance is connected, and the slag notch of the sludge gasification unit is connected with the entrance of the afterheat of slags recovery unit, the high temperature
The gas vents of dust removing units, ash hole gas access respectively with the high-temperature gas waste heat recovery unit, sludge gasification list
The returning charge mouth of member is connected, and the gas vent of the afterheat of slags recovery unit is connected with the air intake of the air preheater,
The gas vent of the gas purification units is connected with the fuel inlet of the gas fired-boiler, the steam (vapor) outlet of the gas fired-boiler
It is sequentially connected with the saturated vapor blender, sludge drying machine, the soft water outlet of the unit for treating water and the High Temperature Gas
The economizer of body waste heat recovery unit, the soft water entrance of the gas fired-boiler are connected.
2. a kind of system of recycling sludge processing according to claim 1, it is characterised in that the sludge drying unit
Including sludge drying machine, deduster, condenser, the sludge drying machine, deduster, condenser are sequentially connected by pipeline, institute
State the charging aperture of the mud mouth of sludge drying machine, the gas outlet of condenser by conveying equipment respectively with the sludge gasification unit
And fixed gas entrance is connected, the liquid outlet of the condenser is connected with the unit for treating water.
3. a kind of system of recycling sludge processing according to claim 1, it is characterised in that the high-temperature gas waste heat
Recovery unit include superheater, evaporator, economizer, the superheater, evaporator, economizer by pipeline respectively with the dirt
Steam inlet, the entrance of gas purification units gas, the steam inlet of air preheater of mud gasification unit are connected.
4. a kind of system of recycling sludge processing according to any one of claims 1 to 3, it is characterised in that the sky
Air preheater includes the outlet of two preheated airs and a saturated vapor gas outlet, two preheated airs outlets respectively with the dirt
The air intake of mud gasification unit, the air intake of gas fired-boiler are connected, and the saturated vapor outlet is mixed with the saturated vapor
Clutch is connected.
5. a kind of system of recycling sludge processing according to claim 4, it is characterised in that the high-temperature dust removal unit
Arrange two grades of cyclone dust collectors or gravitational dust collecting device.
6. a kind of method of recycling sludge processing, it is characterised in that：Comprise the following steps：
(1) wet mud is pumped into sludge drying unit by screw rod, and dehydration is dried through sludge drying machine, produces dewatered sludge
And waste gas, waste gas removing dust device dedusting, obtain fixed gas and desiccation waste water after condenser cooling；
(2) fixed gas that sludge drying unit is produced returns to the gasification furnace progress harmless treatment of sludge gasification unit, and desiccation is given up
Water is delivered to work system circulation after unit for treating water processing and used；
(3) sludge enters sludge gasification unit and preheated air, gasification steam generation gasification reaction after desiccation, produces high temperature flammable
Gas and high-temperature ash；
(4) high-temperature combustible gas body enters at high-temperature gas waste heat recovery unit and unit for treating water after high-temperature dust removal unit dedusting
Softened water heat exchange after reason, produces superheated steam, cools after combustion gas heat exchange；
(5) high-temperature ash enters afterheat of slags recovery unit with being discharged after air heat-exchange, air air inlet preheater after preheating
Further preheating；
(6) superheated steam that high-temperature gas waste heat recovery unit is produced, a part introduces sludge gasification unit to be made as gasifying agent
With being partly into air preheater and preheated air and exchange heat, raise preheated air temperature；
(7) combustion gas enters gas fired-boiler and preheating air combustion to the soft water heat supply generation saturation from unit for treating water after exchanging heat
Steam, supplies sludge drying unit and carries out dirt after being mixed in saturated vapor blender with the saturated vapor from air preheat gas
Mud desiccation is used.
7. a kind of method of recycling sludge processing according to claim 6, it is characterised in that：It is wet described in step (1)
Sludge moisture content after desiccation is down to less than 15%.
8. a kind of method of recycling sludge processing according to claim 6, it is characterised in that：Gas described in step (3)
Change condition is：800-950 DEG C of temperature, pressure 10-30kpa produces 900-950 DEG C of high-temperature combustible gas temperature, high-temperature ash temperature
950-1000 DEG C of degree.
9. a kind of method of recycling sludge processing according to claim 6, it is characterised in that：In step (4), the production
The temperature of raw superheated steam is 450-540 DEG C, and greenhouse cooling is to 170 DEG C -250 DEG C after combustion gas heat exchange.
10. a kind of method of recycling sludge processing according to claim 6, it is characterised in that：The step (5) is extremely
(7) in, the preheated air temperature after being preheated through afterheat of slags recovery unit is 150-300 DEG C, further pre- through air preheater
The air themperature of heat is 350-450 DEG C, and the superheat steam temperature that high-temperature gas waste heat recovery unit is produced is 450-540 DEG C, is satisfied
It it is 160-170 DEG C with the vapor (steam) temperature that mixture of steam is exported.
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| CN107739630A (en) * | 2017-11-21 | 2018-02-27 | 浙江大学 | A kind of Biomass Gasification in Circulating Fluidized Bed device |
| CN108587691A (en) * | 2018-03-29 | 2018-09-28 | 东南大学 | A kind of system and method for municipal sludge pressurized gasification gas turbine power generation |
| CN109574453A (en) * | 2018-12-28 | 2019-04-05 | 联合瑞升（北京）科技有限公司 | A kind of evaporation energy-saving system of sludge heat drying |
| CN110304804A (en) * | 2019-02-18 | 2019-10-08 | 联合瑞升（北京）科技有限公司 | A kind of sludge hot is quenched and desiccation is carbonized energy conserving system |
| CN110451767A (en) * | 2019-08-23 | 2019-11-15 | 安阳艾尔旺新能源环境有限公司 | Sludge drying system |
| CN113234490A (en) * | 2021-05-24 | 2021-08-10 | 上海市城市建设设计研究总院（集团）有限公司 | Gasification-based sludge comprehensive utilization system and treatment method |
| CN113583715A (en) * | 2021-07-26 | 2021-11-02 | 安徽科达洁能股份有限公司 | Circulating fluidized bed gasification method of sludge pulverized coal |
| CN115403231A (en) * | 2022-09-01 | 2022-11-29 | 昆明明书科技有限公司 | Flexible mummification production line of super supercritical low carbon heat source of mud |
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| CN115403231A (en) * | 2022-09-01 | 2022-11-29 | 昆明明书科技有限公司 | Flexible mummification production line of super supercritical low carbon heat source of mud |
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Application publication date: 20170825 |