CN103822213A - Integrated technology and system for urban sludge heat dehydration, waste heat drying and fluidized incineration - Google Patents
Integrated technology and system for urban sludge heat dehydration, waste heat drying and fluidized incineration Download PDFInfo
- Publication number
- CN103822213A CN103822213A CN201410101939.7A CN201410101939A CN103822213A CN 103822213 A CN103822213 A CN 103822213A CN 201410101939 A CN201410101939 A CN 201410101939A CN 103822213 A CN103822213 A CN 103822213A
- Authority
- CN
- China
- Prior art keywords
- mud
- sludge
- heat
- enters
- drain sump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention belongs to a sludge handling technology and relates to an integrated technology for urban sludge heat dehydration, waste heat drying and fluidized incineration. The technology for urban sludge heat dehydration, waste heat drying and fluidized incineration includes the steps that after undergoing heat exchange, initial dehydrated sludge is pre-mixed with high temperature ash residue; preheated sludge enters a pyrohydrolysis reaction tank and enters a dehydration tank after undergoing hydrolysis; water is discharged in the dehydration tank, one path of the water enters a waste water evaporator through air floatation, and secondary steam is generated after evaporation of the water to be supplied to the sludge for pyrohydrolysis, and the other path of water passes through a waste water waste heat-sludge heat exchanger; broken sludge particles stay in a sludge bin; the broken sludge in the sludge bin is fluidized and dried; the dried sludge enters a fluidized bed heat conduction oil boiler to be incinerated, bottom ash is removed from the ash residue, and high temperature quartz sand and the sludge are mixed to preheat sludge. The technology is reasonable and simple, dehydration, waste heat drying and liquidized incineration are organically integrated so that urban sludge can be organically handled, and the handling effect is good.
Description
one, technical field
The invention belongs to sludge disposal technology, the innoxious treatment process of especially a kind of municipal wastewater treatment plant's dewatered sludge minimizing stabilisation.
two, background technology:
Mud is the gunk take organic matter as main component forming in water treatment procedure, the aggregate that the organic and inorganic particle of the zoogloea being formed by multiple-microorganism and absorption thereof forms, the organic matter that contains a large amount of moisture and difficult degradation, heavy metal and salt, pathogen, parasitic ovum etc.Along with the development of Chinese society economy and urbanization, sewage treatment plant constantly increases, and the output of mud also increases substantially.The mud that sewage treatment plant produces is after preliminary concentrated, and moisture content still more than 80%, and wherein contains a large amount of pollutants, and Treatment of Sludge is the environmental problem that solution is badly in need of in China.
End 2010,2832 of the built urban wastewater treatment firms in the whole nation, urban wastewater treatment firm year the amount of disposing of sewage reach 31,800,000,000 tons, the total amount of sewage discharge at city and county town has reached 450.8 hundred million tons.Wherein, 657 urban sewage discharge total amounts are 378.7 hundred million tons, and 1633 county town total amount of sewage discharge are 72.1 hundred million tons.Throughput reaches 1.25 hundred million ton per days, and the whole nation 96% the planned city, 65% county town are all built a sewage treatment plant.During " 12 ", the town sewage treatment scale in national planned range reaches 1.71 billion cubic meter/days (it is 1.3 tons that 10,000 tons of sanitary sewages approximately can produce dewatered sludge amount).During " 12 ", it is 2,500 ten thousand tons/year that the city sludge in national planned range is processed disposal scale, is converted into 518.13 ten thousand tons/year, dry mud.
Municipal sludge is pollutant and a kind of resource.In mud, contain large amount of organic matter, there is fuel value.The dewatered sludge Treatment and recovery of China utilizes technology still not form a unified thinking.Research safety, efficient, economic sludge treatment technique, realize minimizing, stabilisation, the innoxious hot issue of widely paying close attention to that becomes of mud.Sludge treating method mainly contains three kinds at present: landfill, soil utilization, burning.Landfill is traditional Treatment of Sludge mode, and the place that produces secondary pollution and suitable Sludge landfill due to meeting is more and more limited, and the application of Sludge landfill is restricted.Soil utilization mainly comprises that agricultural sludge, mud are for the improvement in the places such as forest and gardening, discarded mining site etc., and the venomous injurant in mud can cause soil or water pollution.Sludge incineration is to apply in recent years disposal options more widely, and its advantage is to realize to greatest extent the minimizing of mud.Sludge incineration place is equipped with two kinds of modes: the one, and direct burning, mixes coal or the after-combustion of wet goods auxiliary fuel by dewatered sludge.The 2nd, mud burns after mummification again, and dewatered sludge further carries out burning after drying and other treatment.Mummification mode is divided two kinds of direct mummification and indirectly dryings, and both differences are that thermal source is directly or indirectly to heat as heat transferring medium.
In mud, contain rudimentary organic matter, as amino acid, humic acid, bacterium and metabolite, polycyclic aromatic hydrocarbon, heterocycle compound etc., it is relatively simple for structure, and through two stage biological oxidation, the decomposition being subject in various degree destroys, be easy to pyrolytic, therefore decomposition temperature, initiation temperature and after-flame temperature are lower, be easy to burning, and after mummification, moisture percentage in sewage sludge is low, has reduced the consumption of moisture evaporation energy, therefore anhydration and incineration has greater advantage, compared with directly burning with mud, one-time investment is few, and processing cost is low.Therefore, sludge drying-burning be municipal sewage plant carry out mud rational exploitation and utilization must be through approach, be the good method that mud is carried out minimizing, stabilisation, innoxious, resource.In dewatered sludge, contain nearly 40% organic substance, there is combustibility, so mud had both been regarded as discarded object, be regarded as again a kind of biomass resource.Rationally utilize sludge resource to become the new development trend that mud effectively utilizes.
Publication date is on September 26th, 2007, publication number is CN101041544, application number is that 200710011115.0 patent of invention is the rotary drum film pressing sludge drying machine that the applicant applies for, the rotary heating face rotation along with inner water flowing steam with foraminous conveyer by pressure roller, drive dewatered sludge to rotate along rotary heating face and foraminous conveyer, the conduction of heat of water vapour reduces moisture percentage in sewage sludge.This equipment is researched and developed according to sludge quality and heat exchange principle at film.But there is many difficult problems that is difficult to overcome in this technique, first, due to the high viscosity of mud, in dry run, there is serious adhesive tape problem, cause conveyer belt mesh to stop up, water translocation and volatilization are seriously obstructed, and cause drying efficiency to decline; Secondly, in mud, the moisture overwhelming majority is vaporized, and makes thus energy consumption significantly increase.
Publication date is on July 23rd, 2008, publication number is CN101224912, application number is that 200810026039.5 patent of invention discloses a kind of drying method for sludge, propose dewatered sludge and dewatered sludge to carry out mix and blend, the product part drawing is sold as product, a part continues to be dried to dewatered sludge and wet mud blending is stirred, and avoids the gluing interval mutually of drying sludge by mixing method.It is feasible that this method is analyzed theoretically, but in practical operation, needs to add a large amount of dewatered sludge blending and just can obtain the product of required water cut value, does not fundamentally cross the barrier of current drying sludge.
Publication date is on September 20th, 2011, publication number is 102381820A, application number is that 201110279705.8 patent of invention discloses a kind of sludge treatment technique based on hydrothermal modification technology, propose mud to add to enter after dilution water after fully mixing homogeneous in homogeneous device to enter slurrying device, after pulp, mud enters hydrothermal reactor and carries out hydro-thermal reaction, after hydro-thermal, mud enters vacuum flashing in flash vessel, after cooler is cooled to 35-45 ℃, enter autoclave diaphragm filter press and carry out filter-press dehydration, dehydrated sludge cake is made into biomass fuel rod, enter boiler and provide steam for hydrothermal reactor and flash vessel.The main deficiency that this sludge treatment technique exists is as follows: (1) need to add Macrodilution water, has increased thus hydro-thermal pulp process steam consumption; (2) after mud cooling, be stable colloid state, filter-press dehydration is more difficult, and high pressure press filtration energy consumption is high.
In sum, the core of Treatment of Sludge is to realize efficient drying under the lower condition of energy consumption, the high-moisture percentage of mud, high viscosity cause it to dehydrate bottleneck being difficult to overcome, and traditional heating and gasifying drying means is owing to good too highly eventually cannot realizing industrialization operation.Therefore, need a kind of low energy consumption of exploitation, sludge dewatering efficiently, desiccation integral metallization processes badly, really realize innoxious, the recycling treatment of mud.
summary of the invention:
The present invention proposes a kind of municipal sludge and process and dispose integral process, the method is applicable to city dehydrated sludge harmless treatment and disposal.Hydrolyzed modified sludge hot, explosion are realized to breaking-wall cell, Auto-drainage, high velocity air and realize the drying integrated system process of the high-moisture percentage paste object that sludge water content combines from techniques such as, fume afterheat fluidized bed drying, waste water evaporation secondary steam recyclings.
The concrete technical scheme of the present invention is as follows: the dehydration of a kind of municipal sludge heat, waste heat are dried and fluidized incineration integral process, comprise the steps:
(1) in the initial dewatered sludge of moisture 80-88%, add quartz sand, after heat exchanger heat exchange, carry out premixed with high-temperature ash, mud is preheated;
(2) after preheating, mud carries out pyrohydrolysis reaction, after hydrolysis completes, enters fast drain sump;
(3), in drain sump, in mud, moisture is discharged by being arranged on the inner filter core of drain sump under system pressure effect;
(4) discharge moisture in drain sump, a part is removed in waste water after impurity through air supporting, enters waste water evaporimeter, produces indirect steam and supply with sludge hot hydrolysis after evaporation; Another part, by waste water residual heat-mud heat exchanger, is given initial mud preheating;
(5) mud explosion discharge under system pressure effect in tank in drain sump, be broken and atomization, due to moisture and sludge density poor larger, Sludge Surface moisture is carried discharge by high-speed compressed air, through the laggard sewage disposal of condensation, mud granule rests in sludge bin;
(6) in sludge bin, broken mud carries out fluidized drying, flue gas after purified treatment outside row;
(7) dry rear mud finally enters the burning of fluid bed heat conducting oil boiler, and by heat-conducting oil heating, lime-ash enters separator and removes bottom ash, and high quartz sand mixes with mud and preheating mud, and the outer row of bottom ash is used as brickmaking;
(8) after heated, conduction oil circulation enters waste water evaporimeter 7, will be heated to from waste water in pressure air-dissolving air-float tank 6 temperature requiredly, and the secondary saturated vapor that produces enters pyrohydrolysis retort 4, and flue gas enters fluidized bed dryer.
In the mud of described (1) moisture content 80-88%, add mud total amount 10%(quality) high-temperature ash, then directly add pyrohydrolysis retort, in pyrohydrolysis retort, saturated vapor directly enters at the bottom of tank, and vapor distribution plate is set at the bottom of tank, adopts Stirring in tank, mud is fully contacted with saturated steam, realize flash heat transfer and mass transfer, in the time that reactor temperature reaches design temperature 150-200 ℃ and pressure 0.5-1.6MPa, maintain reaction time 10-30 min left and right.
Mud heating in described (3) pyrohydrolysis retort, after being hydrolyzed, for the temperature maintaining in dehydration tank is not less than 150 ℃, mud is before entering drain sump, 170 ℃ of saturated steams will be full of in drain sump, then open pyrohydrolysis retort and drain sump communicating valve, then constantly make mud enter fast drain sump toward retort top supplementing water steam or compressed air, in order to make mud to enter drain sump from pyrohydrolysis retort smoothly, drain sump top setting pressure control valve, when drain sump internal pressure is closed during lower than setting pressure, during higher than setting pressure, open.
Described (3) are arranging multiplayer annular hollow filter core in drain sump, and mud contained humidity sees through multi-layered filtering element and discharges in drain sump under system pressure effect; Retort system pressure can be supplemented and be provided by compressed air.
Described (3) drain sump inner filter core is connected with water storing tank, and water storing tank and drain sump pressure maintain 0.3-0.4 MPa pressure reduction; Water storing tank internal pressure is provided by compressed air, and in mud, effluent sewerage enters after water storing tank, dissolves a certain amount of air under compressed air pressure effect.
Discharge moisture in described (4) drain sump, a part is removed in waste water after impurity through air supporting, enters waste water evaporimeter, produces indirect steam and supply with sludge hot hydrolysis after evaporation; Another part, by waste water residual heat-mud heat exchanger, is given initial mud preheating.
After mud drainage procedure completes in described (5) drain sump, open fast bottom valve door, utilize overbottom pressure in tank that dehydrated sludge blasting type is entered to demolition set.
Some air knives (pressure-air provides) are installed in described (5) explosion storehouse bottom, and dehydrated sludge is entering in the process of explosion storehouse, by vertical direction air knife cut and smash, atomization.According to the density contrast of mud and water, in the collision process of high velocity air and water-containing sludge, moisture is carried by high velocity air, discharges along airflow direction (vertically to), mud granule is along former direction (level to) and the collision of explosion storehouse, fragmentation, discharges at the bottom of finally falling into storehouse.
Described (6) enter fluidized bed dryer from discharging mud at the bottom of explosion storehouse, with dry from sludge incinerator smoke convection, by further mud mummification.
After described (7) are dry from fluid bed, mud enters circulating fluidized bed heat conducting oil boiler, and sludge incineration is by heat-conducting oil heating; Sludge incineration rear section lime-ash directly adds in initial mud, gives mud preheating, realizes recycling of part lime-ash.
The dehydration of a kind of municipal sludge heat, waste heat is dried and fluidized incineration integral system, sludge bin discharging opening is communicated with mud and sewage heat exchanger, mud and sewage heat exchanger sludge outlet is communicated with mud-lime-ash mixing bunker, outlet of sewer is communicated with treatment center of sewage, the outlet of fluid bed heat conduction oil boiler boiler ash sediment is communicated with mud-lime-ash mixing bunker after grey pulp separator, mud-lime-ash mixing bunker discharging opening is communicated with pyrohydrolysis retort, pyrohydrolysis retort steam inlet is communicated with waste water evaporimeter steam (vapor) outlet, the saturated vapor that waste water evaporimeter steam (vapor) outlet is discharged directly enters at the bottom of pyrohydrolysis retort tank, at the bottom of pyrohydrolysis retort tank, vapor distribution plate is set, in pyrohydrolysis retort tank, adopt Stirring, pyrohydrolysis retort discharging opening is communicated with drain sump, drain sump top setting pressure control valve, arranging multiplayer annular hollow filter core in drain sump, drain sump inner filter core is connected with water storing tank, water storing tank is connected with de-compressed air inlet, mounted valve at the bottom of drain sump tank, drain sump is discharged moisture after pressure air-dissolving air-float tank, one tunnel enters waste water evaporimeter, another road enters mud and sewage heat exchanger, drain sump mud discharging opening is communicated with explosion storehouse, some air knives are installed in bottom, explosion storehouse, explosion storehouse passes into compressed air, the humid air that discharge in explosion storehouse enters condenser, condenser water outlet enters treatment center of sewage, and the broken mud that discharge in explosion storehouse enters fluidized bed dryer, and dry rear mud enters fluid bed heat conducting oil boiler, conduction oil circulation enters waste water evaporimeter, and flue gas enters fluidized bed dryer.
The advantage of this technique is:
(1) power savings advantages: for process moisture 80-87%(quality) city dehydrated sludge, do not need extra fuel or additional heat, can realize the thorough processing of mud;
(2) environment-friendly advantage: mud overall process is processed without outer adding medicine (as all kinds of flocculants); Adopt fluidized incineration can avoid the generation of sludge incineration process bioxin; Heating mud steam used is produced by deviating from water in mud, without extra clean water.
(3) system process is simple, and equipment investment is low.
The present invention adopts pyrohydrolysis technology, first about moisture content 80-90% city dehydrated sludge is heated to uniform temperature (150-200 ℃), makes polysaccharide, protein in mud extracellular polymeric obtain degraded to a certain degree, and its retentiveness is reduced; Mud colloidal stability declines simultaneously, and viscosity significantly reduces.First, mud to temperature required, is realized sludge modification by steam direct heating.Then this mud enters automatic drain system, moisture in mud is discharged automatically by filter core, realize muddy water and automatically separate, the moisture of discharging enters sewage pressure air-dissolving air-float system, realize air supporting except suspension and other macromolecule contaminants in decontaminated water, carry out Preliminary sewage pretreatment.After draining, the quick-fried formula of mud enters explosion storehouse and realizes sludge cell wall breakage, and is cut and pulverize by high velocity air, and Sludge Surface residual moisture is carried separation by air-flow.Dehydrated sludge enters waste heat flue gas fluidized bed dryer, and carries out convective drying from boiler smoke, further by sludge dewatering, dry.After dry, mud enters fluidized bed incinerator, burns the heat part that produces and is used for heating conduction oil, and another part waste heat flue gas is for fluidized bed dryer dewatered sludge; After heated, conduction oil enters waste water evaporimeter and provides heat for waste water evaporates, last, and conduction oil refluxes and enters heat-conducting oil furnace circulating-heating.The invention of this technique is applicable to city dehydrated sludge harmless treatment and disposal, and mud self institute heat content can meet mud overall process and process required.A kind of clean, high efficient technology of innoxious, recycling treatment high-moisture percentage paste object.
System of the present invention arranges reasonable compactness, wherein pre-heating system mainly comprises waste water preheating mud and fluidized bed incinerator high quartz sand preheating two parts, its function is to reclaim waste heat and lime-ash waste heat in waste water, lime-ash is except having preheating mud, another one major function be utilize in lime-ash institute electrically charged in and mud colloid institute static electrification, destroy mud colloidal stability.Pyrohydrolysis system, by mud after preheating and steam, is heated to design temperature by mud, realizes sludge modification.Automatic drain system is discharged moisture in mud automatically by filter core, realizes muddy water and automatically separates, and enter sewage pressure air-dissolving air-float system.In sewage pressure air-dissolving air-float system, after the dissolution of contaminated water compressed air from automatic drain system, discharge dissolved air by decompression, realize air supporting except suspension and other macromolecule contaminants in decontaminated water, carry out Preliminary sewage pretreatment.Blasting system is further broken by dehydrated sludge, realizes sludge cell wall breakage simultaneously, and is cut and pulverize by high velocity air, and Sludge Surface residual moisture is carried separation by air-flow, and the mud that proportion is greater than water falls back to sludge bin naturally.In waste heat flue gas drying system, enter fluidized bed dryer from sludge bin mud, and carry out convective drying from boiler smoke, further by sludge dewatering, dry.Fluidized incineration system is made up of fluidized incineration and heat-conducting oil furnace two parts, will be from mud fluidized incineration after dry in waste heat flue gas drying system, by heat-conducting oil heating to temperature required.In waste water vapo(u)rization system, part is from sewage pressure air-dissolving air-float system, after preliminary treatment, sewage is also evaporated from fluidized incineration system heat-conducting oil heating, and indirect steam enters sludge hot hydrolysis system and provides heat for sludge hot is hydrolyzed, and conduction oil refluxes and enters heat-conducting oil furnace circulating-heating.
accompanying drawing explanation:
Fig. 1 is that the described dehydration of municipal sludge heat, waste heat is dried and fluidized incineration integral process flow chart
Fig. 2 is that the described dehydration of municipal sludge heat, waste heat is dried and fluidized incineration integral process energy balance figure;
In figure: 1. sludge bin; 2. mud and sewage heat exchanger; 3. mud-lime-ash mixing bunker; 4. pyrohydrolysis retort; 5. drain sump; 6. pressure air-dissolving air-float tank; 7. waste water evaporimeter; 8. explosion storehouse; 9. fluidized bed dryer; 10. fluid bed heat conducting oil boiler; 11. condensers; 12. lime-ash separate; 13. brick equipments.
The specific embodiment
Describe specific embodiments of the invention in detail below in conjunction with technical scheme and accompanying drawing.
The dehydration of a kind of municipal sludge heat, dry and the fluidized incineration integral system of waste heat as shown in Figure 1, sludge bin 1 discharging opening is communicated with mud and sewage heat exchanger 2, mud and sewage heat exchanger sludge outlet is communicated with mud-lime-ash mixing bunker 3, outlet of sewer is communicated with treatment center of sewage, the outlet of fluid bed heat conduction oil boiler boiler ash sediment is communicated with mud-lime-ash mixing bunker after grey pulp separator 12, the ashes that ash pulp separator is discharged enter brick equipment 13, mud-lime-ash mixing bunker discharging opening is communicated with pyrohydrolysis retort 4, pyrohydrolysis retort steam inlet is communicated with waste water evaporimeter 7 steam (vapor) outlets, the saturated vapor that waste water evaporimeter steam (vapor) outlet is discharged directly enters at the bottom of pyrohydrolysis retort tank, at the bottom of pyrohydrolysis retort tank, vapor distribution plate is set, in pyrohydrolysis retort tank, adopt Stirring, pyrohydrolysis retort discharging opening is communicated with drain sump 5, drain sump top setting pressure control valve, arranging multiplayer annular hollow filter core in drain sump, drain sump inner filter core is connected with water storing tank, water storing tank is connected with de-compressed air inlet, mounted valve at the bottom of drain sump tank, drain sump is discharged moisture after pressure air-dissolving air-float tank 6, one tunnel enters waste water evaporimeter, another road enters mud and sewage heat exchanger, drain sump mud discharging opening is communicated with explosion storehouse 8, some air knives are installed in bottom, explosion storehouse, explosion storehouse passes into compressed air, the humid air that discharge in explosion storehouse enters condenser 11, condenser water outlet enters treatment center of sewage, and the broken mud that discharge in explosion storehouse enters fluidized bed dryer 9, and dry rear mud enters fluid bed heat conducting oil boiler 10, conduction oil circulation enters waste water evaporimeter, and flue gas enters fluidized bed dryer.
The dehydration of municipal sludge heat, waste heat are dried and a fluidized incineration integral process as shown in Figure 2, comprise the steps:
(1) the initial dewatered sludge of the paste of moisture 80-88% is stored in sludge bin, sludge bin discharging opening is communicated with mud-sewage heat exchanger, after the heat exchange of mud-sewage heat exchanger, enter mud-lime-ash mixing bunker, fluid bed heat conducting oil boiler burns the high-temperature ash of discharging after lime-ash separates, high-temperature ash enters mud-lime-ash mixing bunker, high-temperature ash and mud carry out premixed, and mud is preheated, and realize sludge modification simultaneously;
(2) after modification, mud is squeezed into pyrohydrolysis retort 4 by plunger displacement pump, in pyrohydrolysis retort, the saturated vapor that waste water evaporimeter steam (vapor) outlet is discharged directly enters at the bottom of pyrohydrolysis retort tank, at the bottom of pyrohydrolysis retort tank, vapor distribution plate is set, in pyrohydrolysis retort tank, adopt Stirring, mud is fully contacted with saturated steam, realize flash heat transfer and mass transfer, in the time that reactor temperature reaches design temperature 150-200 ℃ and pressure 0.5-1.6MPa, maintain reaction time 10-30 min left and right, after hydrolysis completes, blasting type enters drain sump 5;
(3) for the temperature maintaining in dehydration tank is not less than 150 ℃, mud is before entering drain sump, 170 ℃ of saturated steams will be full of in drain sump, then open pyrohydrolysis retort and drain sump communicating valve, then constantly make mud enter fast drain sump toward retort top supplementing water steam or compressed air, in order to make mud to enter drain sump from pyrohydrolysis retort smoothly, drain sump top setting pressure control valve, close during lower than setting pressure when drain sump internal pressure, during higher than setting pressure, open; In drain sump 5, arranging multiplayer annular hollow filter core in drain sump, mud contained humidity sees through multi-layered filtering element and discharges under the effect of drain sump system pressure; Retort system pressure can be supplemented and be provided by compressed air; Drain sump inner filter core is connected with water storing tank, and water storing tank and drain sump pressure maintain 0.3-0.4 MPa pressure reduction; Water storing tank internal pressure is provided by compressed air, and in mud, effluent sewerage enters after water storing tank, dissolves a certain amount of air under compressed air pressure effect;
(4) sewage of discharging from drain sump filter core enters pressure air-dissolving air-float tank 6, sewage is removed in waste water after suspension and partial polymer through air-dissolving air-float, one tunnel enters waste water evaporimeter 7, produces indirect steam and enters pyrohydrolysis retort 4, for sludge hot hydrolysis provides required steam; Another road enters mud-sewage heat exchanger 2, by laggard mud preheating sewage disposal;
(5) the interior mud of drain sump 5 explosion discharge under overbottom pressure effect in tank, enter explosion storehouse 8, some air knives (pressure-air provides) are installed in bottom, explosion storehouse, and top passes into compressed air, dehydrated sludge is entering in the process of explosion storehouse, by vertical direction air knife cut and smash, atomization.According to the density contrast of mud and water, in the collision process of high velocity air and water-containing sludge, moisture is carried and is humid air by high velocity air, discharge along airflow direction (vertically to), mud granule is along former direction (level to) and the collision of explosion storehouse, fragmentation, mud granule finally falls into sludge bin 8, and humid air is through the laggard sewage disposal of condenser condenses;
(6) in sludge bin 8, broken mud enters fluidized bed dryer 9, is carried out fluidized drying by the flue gas from fluid bed heat conducting oil boiler 10, flue gas after purified treatment outside row;
(7) after dry from fluid bed, mud finally enters fluid bed heat conducting oil boiler 10 and burns, sludge incineration is by heat-conducting oil heating, after sludge incineration, lime-ash enters separator, after separating, quartz sand enters in initial mud and mixes, the outer row of bottom ash is as brickmaking, and waste heat flue gas enters fluidized bed dryer 9 sludge-dryings; Part lime-ash directly adds in initial mud, gives mud preheating, realizes recycling of part lime-ash;
(8) enter waste water evaporimeter 7 from conduction oil circulation after heated in fluid bed heat conducting oil boiler 10, will heat and gasify to temperature required from waste water in pressure air-dissolving air-float tank 6; The humid air of discharging from explosion storehouse 8 is condensed in air cooler 11, and sewage water inlet is processed, and flue gas enters fluidized bed dryer.
Below in conjunction with Fig. 2, carry out system material and energy balance with 1 ton of moisture 85% mud of every processing:
(1) feedstock analysis
Mud used is taken from the dewatered sludge of certain sewage disposal-factory of plumbing company, and for initial aqueous rate is about 85% black cream paste, butt calorific value is 13 MJ/kg,
Table 1 dewatered sludge Industrial Analysis result
| Material | Fugitive constituent (%) | Fixed carbon (%) | Ash content (%) | Moisture (%) |
| Dewatered sludge 1 | 66.57 | 11.34 | 22.19 | 3.18 |
| |
66.68 | 12.17 | 21.05 | 3.60 |
| On average | 66.68 | 11.75 | 21.62 | 3.39 |
The elementary analysis of table 2 dewatered sludge
| Material | C(%) | H(%) | N(%) | S(%) |
| Dewatered sludge 1 | 42.62 | 6.74 | 6.52 | 1.23 |
| |
42.36 | 6.84 | 6.73 | 1.21 |
| On average | 42.49 | 6.79 | 6.63 | 1.22 |
(2) logistics and energy flux computation
1) 1 ton of moisture 85% mud enters sludge bin, is heated (mode of heating is spiral coil) from pressure air-dissolving air-float system sewage, and sewage total amount is 520kg, and inlet temperature is 140 ℃, and outlet temperature is 68.4 ℃, mud initial temperature T
0=20 ℃, mud specific heat gets 4.18 × 10
3kJ/kg ℃ (consistent with water), now mud is preheated final temperature and is:
2) mud is further heated, and final temperature is
t 1 :
Try to achieve
t 1 =80.4 ℃
3) mud enters pyrohydrolysis system, is heated to 180 ℃, and this part consumption of calorie is divided into two parts, and a part is the mud required 180 ℃ of saturated vapor quality Q that heat up
1, this part can be obtained by calculating; Another part is the required 180 ℃ of saturated vapor quality Q of sludge part component pyrolysis
2, this partial data can only be obtained by test, can be calculated:
Q 1 =138.6
kg;
Actual measurement
q 2 =80
kg;
3) mud enters drainage system, under system pressure effect, discharges water inventory actual measurement for 800kg in mud, and temperature is 140 ℃ (about 0.4MPa).
4) discharge water after pressure air-dissolving air-float is processed, wherein 218.6 kg enter waste water evaporimeter, and all the other 581.4kg enter mud heat exchanger preheating mud;
5) in dewatering system, mud explosion enters explosion storehouse, and this part mud is after hydrolysis, and butt loss 5%(enters in water, actual measurement), now dehydrated sludge moisture content is:
Now mud gross mass is 518.6 kg, and temperature is 140 ℃;
6) gross mass is 518.6 kg, and moisture content 53.3%, temperature are that 140 ℃ of mud enter explosion storehouse fast, cut by high velocity air and pulverizing, atomization, and the quick flash distillation of contained residual moisture in mud, mud is discharged at the bottom of storehouse.Now recording and discharging the final moisture content of mud is W
1=48.7%, quality is 496.5kg.
7) moisture content is W
1=48.7%, the mud that quality is 496.5kg enters circulating sulfuration bed dryer, is dried to 30%, need remove moisture 150.8kg, and the whole origin self-fluidized type of institute's calorific requirement bed incinerator waste heat flue gas provides.
8) from fluidized bed dryer, discharge moisture 30% mud, gross mass is 345.7kg, wherein containing quartz sand 100kg, and containing mud 142kg(calorific value 15MJ/kg, butt), moisture 103.7kg, according to mud Industrial Analysis, can calculate and produce flue gas 1657.3 m
3(excess air factor gets 1.2), gross calorific power is Q
always=2130MJ, efficiency of combustion gets 95%, and other heat loss get 5%, and available energy is 1922MJ so.This mud enters fluidized bed incinerator, burns a generation heat part and is used for heating conduction oil, and after heating, conduction oil enters waste water evaporator evaporation waste water (heat exchange efficiency gets 0.8 for 218.6kg saturated vapor, 80.4 ℃ of initial temperatures), and this part consumption of calorie is Q
gasification=873MJ; Another part heat is taken away by flue gas, for fluidized bed dryer sludge-drying.Flue gas initial temperature is 550 ℃, and exhaust gas volumn is 1657.3m
3, enthalpy is 817.1KJ/m3, and exhaust gas temperature is 120 ℃, and enthalpy is 144.4KJ/m3, and release heat is 1657.3m so
3× (817.1KJ/m3-144.4KJ/m3)=1114.9 × 103KJ, the hot effective rate of utilization 0.8 of convective drying process, so effectively utilizes heat 1114.9 × 103KJ × 0.8=891.9 × 103KJ, and this partial fume mixes air at room temperature 2463.6m
3, temperature is reduced to 250 ℃.From (6), need remove moisture 150.8kg, theoretical thermal losses is Q
mummification=440MJ, only for can effectively utilize 50% of heat (891.9 × 103KJ), now, system total amount of heat utilization rate is:
Claims (10)
1. the dehydration of municipal sludge heat, waste heat are dried and a fluidized incineration integral process, it is characterized in that: comprise the steps:
(1) the initial dewatered sludge of moisture 80-88% enters heat exchanger, after heat exchanger heat exchange, burns the high-temperature ash of discharging carry out premixed with boiler, and mud is preheated, and realizes sludge modification simultaneously;
(2) after preheating, mud carries out pyrohydrolysis retort, passes into the indirect steam that waste water evaporimeter produces, and mud is heated and be hydrolyzed, and after hydrolysis completes, enters fast drain sump;
(3), in drain sump, in mud, moisture is discharged by being arranged on the inner filter core of drain sump under system pressure effect;
(4) discharge moisture in drain sump, remove in waste water after impurity through air supporting on a road, enters waste water evaporimeter, produces indirect steam and supply with sludge hot hydrolysis after evaporation; Separately lead up to waste water residual heat-mud heat exchanger, give initial mud preheating;
(5) mud explosion discharge under system pressure effect in tank in drain sump, be broken and atomization, due to moisture and sludge density poor larger, Sludge Surface moisture is carried discharge by high-speed compressed air, through the laggard sewage disposal of condensation, mud granule rests in sludge bin;
(6) in sludge bin, broken mud carries out fluidized drying, flue gas after purified treatment outside row;
(7) dry rear mud finally enters the burning of fluid bed heat conducting oil boiler, and by heat-conducting oil heating, lime-ash enters separator and removes bottom ash, and high quartz sand mixes with mud and preheating mud, and the outer row of bottom ash is used as brickmaking;
(8) after heated, conduction oil circulation enters waste water evaporimeter, will be heated to from waste water in pressure air-dissolving air-float tank temperature requiredly, and the secondary saturated vapor that produces enters pyrohydrolysis retort, and flue gas enters fluidized bed dryer and provides required heat energy for sludge drying.
2. a kind of municipal sludge heat according to claim 1 dehydration, waste heat is dried and fluidized incineration integral process, it is characterized in that: in the mud of described (1) moisture content 80-88%, add mud total amount 10% high-temperature ash), then directly add pyrohydrolysis retort, in pyrohydrolysis retort, saturated vapor directly enters at the bottom of tank, vapor distribution plate is set at the bottom of tank, in tank, adopt Stirring, mud is fully contacted with saturated steam, realize flash heat transfer and mass transfer, in the time that reactor temperature reaches design temperature 150-200 ℃ and pressure 0.5-1.6MPa, maintain reaction time 20-30 min left and right.
3. a kind of municipal sludge heat according to claim 1 dehydration, waste heat is dried and fluidized incineration integral process, it is characterized in that: mud heating in described (3) pyrohydrolysis retort, after being hydrolyzed, for the temperature that maintains mud in dehydration tank is at 150 ℃, mud is before entering drain sump, 170 ℃ of saturated steams will be full of in drain sump, then open pyrohydrolysis retort and drain sump communicating valve, then constantly make mud enter fast drain sump toward retort top supplementing water steam or compressed air, in order to make mud to enter drain sump from pyrohydrolysis retort smoothly, drain sump top setting pressure control valve, when drain sump internal pressure is closed during lower than setting pressure, during higher than setting pressure, open.
4. a kind of municipal sludge heat according to claim 1 dehydration, waste heat are dried and fluidized incineration integral process, it is characterized in that: described (3) are arranging multiplayer annular hollow filter core in drain sump, mud contained humidity sees through multi-layered filtering element and discharges under the effect of retort system pressure; Retort system pressure can be supplemented and be provided by compressed air.
5. a kind of municipal sludge heat according to claim 1 dehydration, waste heat are dried and fluidized incineration integral process, it is characterized in that: described (3) drain sump inner filter core is connected with water storing tank, and water storing tank and drain sump pressure maintain 0.3-0.4 MPa pressure reduction; Water storing tank internal pressure is provided by compressed air, and in mud, effluent sewerage enters after water storing tank, dissolves a certain amount of air under compressed air pressure effect.
6. a kind of municipal sludge heat according to claim 1 dehydration, waste heat are dried and fluidized incineration integral process, it is characterized in that: after in described (5) drain sump, mud drainage procedure completes, open fast bottom valve door, utilize overbottom pressure in tank that dehydrated sludge blasting type is entered to demolition set.
7. a kind of municipal sludge heat according to claim 1 dehydration, waste heat is dried and fluidized incineration integral process, it is characterized in that: some air knives (pressure-air provides) are installed in bottom, described (5) explosion storehouse, dehydrated sludge is entering in the process of explosion storehouse, cut and smash by vertical direction air knife, atomization, according to the density contrast of mud and water, in the collision process of high velocity air and water-containing sludge, moisture is carried by high velocity air, discharge along airflow direction (vertically to), mud granule is along former direction (level to) and the collision of explosion storehouse, broken, at the bottom of finally falling into storehouse, discharge.
8. a kind of municipal sludge heat according to claim 1 dehydration, waste heat are dried and fluidized incineration integral process, it is characterized in that: described (6) enter fluidized bed dryer from discharging mud at the bottom of explosion storehouse, with dry from sludge incinerator smoke convection, by further mud mummification.
9. a kind of municipal sludge heat according to claim 1 dehydration, waste heat are dried and fluidized incineration integral process, it is characterized in that: after described (7) are dry from fluid bed, mud enters circulating fluidized bed heat conducting oil boiler, and sludge incineration is by heat-conducting oil heating; Sludge incineration rear section lime-ash directly adds in initial mud, gives mud preheating, realizes recycling of part lime-ash.
10. municipal sludge heat dehydration, waste heat is dried and fluidized incineration integral system, it is characterized in that: sludge bin discharging opening is communicated with mud and sewage heat exchanger, mud and sewage heat exchanger sludge outlet is communicated with mud-lime-ash mixing bunker, outlet of sewer is communicated with treatment center of sewage, the outlet of fluid bed heat conduction oil boiler boiler ash sediment is communicated with mud-lime-ash mixing bunker after grey pulp separator, mud-lime-ash mixing bunker discharging opening is communicated with pyrohydrolysis retort, pyrohydrolysis retort steam inlet is communicated with waste water evaporimeter steam (vapor) outlet, the saturated vapor that waste water evaporimeter steam (vapor) outlet is discharged directly enters at the bottom of pyrohydrolysis retort tank, at the bottom of pyrohydrolysis retort tank, vapor distribution plate is set, in pyrohydrolysis retort tank, adopt Stirring, pyrohydrolysis retort discharging opening is communicated with drain sump, drain sump top setting pressure control valve, arranging multiplayer annular hollow filter core in drain sump, drain sump inner filter core is connected with water storing tank, water storing tank is connected with de-compressed air inlet, mounted valve at the bottom of drain sump tank, drain sump is discharged moisture after pressure air-dissolving air-float tank, one tunnel enters waste water evaporimeter, another road enters mud and sewage heat exchanger, drain sump mud discharging opening is communicated with explosion storehouse, some air knives are installed in bottom, explosion storehouse, explosion storehouse passes into compressed air, the humid air that discharge in explosion storehouse enters condenser, condenser water outlet enters treatment center of sewage, and the broken mud that discharge in explosion storehouse enters fluidized bed dryer, and dry rear mud enters fluid bed heat conducting oil boiler, conduction oil circulation enters waste water evaporimeter, and flue gas enters fluidized bed dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410101939.7A CN103822213B (en) | 2014-03-19 | 2014-03-19 | The dehydration of a kind of municipal sludge heat, waste heat drying and fluidized incineration integral process and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410101939.7A CN103822213B (en) | 2014-03-19 | 2014-03-19 | The dehydration of a kind of municipal sludge heat, waste heat drying and fluidized incineration integral process and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103822213A true CN103822213A (en) | 2014-05-28 |
| CN103822213B CN103822213B (en) | 2015-10-28 |
Family
ID=50757410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410101939.7A Active CN103822213B (en) | 2014-03-19 | 2014-03-19 | The dehydration of a kind of municipal sludge heat, waste heat drying and fluidized incineration integral process and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103822213B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841160A (en) * | 2016-05-23 | 2016-08-10 | 大连理工大学 | Organic matter self-energy-supply drying and pyrolysis and full-component recycling system and technology method |
| CN107388262A (en) * | 2017-07-27 | 2017-11-24 | 重庆盎瑞悦科技有限公司 | A kind of harmlessness disposing method of comprehensive utilization of high saliferous chemical engineering sludge |
| CN108383354A (en) * | 2018-05-09 | 2018-08-10 | 绍兴上虞阿特兰迪电器有限公司 | A kind of sludge dewatering conveying device and dewatering |
| CN108773992A (en) * | 2018-04-02 | 2018-11-09 | 苏伊士水务工程有限责任公司 | Sludge treatment system and method for treating sludge by using same |
| CN110375304A (en) * | 2019-07-05 | 2019-10-25 | 浦湘生物能源股份有限公司 | Town and country solid waste rubbish based on garbage combustion device cooperates with integrated processing system |
| CN110563306A (en) * | 2019-10-18 | 2019-12-13 | 湖南清源智造设备有限公司 | Multiphase dehumidification sludge drying system |
| CN110642469A (en) * | 2019-10-15 | 2020-01-03 | 怡灏环境技术有限公司 | Sewage advanced treatment system of low energy consumption |
| CN112174483A (en) * | 2020-10-14 | 2021-01-05 | 华能国际电力股份有限公司 | Thermal power generating unit sludge coupling power generation system utilizing flue gas drying |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1160223A (en) * | 1997-08-21 | 1999-03-02 | Kankyo Shigen Eng:Kk | Production of activated carbon by sludge, apparatus therefor and sludge activated carbon |
| CN103013613A (en) * | 2012-12-24 | 2013-04-03 | 西安科技大学 | Clean fuelization system and fuelization method for urban sludge |
| CN103256608A (en) * | 2013-05-23 | 2013-08-21 | 杭州国泰环保科技有限公司 | Sludge incineration method |
| CN103436293A (en) * | 2013-09-11 | 2013-12-11 | 湖南鹞翔科技有限公司 | Multifunctional sludge gasification and combustion device |
| CN103449688A (en) * | 2012-05-28 | 2013-12-18 | 苏州科羽电子技术服务有限公司 | Sludge processing method |
| CN103613268A (en) * | 2013-12-03 | 2014-03-05 | 湖南科技大学 | Sludge dewatering conditioning agent and deep dewatering method thereof |
-
2014
- 2014-03-19 CN CN201410101939.7A patent/CN103822213B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1160223A (en) * | 1997-08-21 | 1999-03-02 | Kankyo Shigen Eng:Kk | Production of activated carbon by sludge, apparatus therefor and sludge activated carbon |
| CN103449688A (en) * | 2012-05-28 | 2013-12-18 | 苏州科羽电子技术服务有限公司 | Sludge processing method |
| CN103013613A (en) * | 2012-12-24 | 2013-04-03 | 西安科技大学 | Clean fuelization system and fuelization method for urban sludge |
| CN103256608A (en) * | 2013-05-23 | 2013-08-21 | 杭州国泰环保科技有限公司 | Sludge incineration method |
| CN103436293A (en) * | 2013-09-11 | 2013-12-11 | 湖南鹞翔科技有限公司 | Multifunctional sludge gasification and combustion device |
| CN103613268A (en) * | 2013-12-03 | 2014-03-05 | 湖南科技大学 | Sludge dewatering conditioning agent and deep dewatering method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841160A (en) * | 2016-05-23 | 2016-08-10 | 大连理工大学 | Organic matter self-energy-supply drying and pyrolysis and full-component recycling system and technology method |
| CN105841160B (en) * | 2016-05-23 | 2017-12-19 | 大连理工大学 | A kind of organic matter self energizing is dried and pyrolysis, full constituent recycling system and process |
| CN107388262A (en) * | 2017-07-27 | 2017-11-24 | 重庆盎瑞悦科技有限公司 | A kind of harmlessness disposing method of comprehensive utilization of high saliferous chemical engineering sludge |
| CN108773992A (en) * | 2018-04-02 | 2018-11-09 | 苏伊士水务工程有限责任公司 | Sludge treatment system and method for treating sludge by using same |
| CN108383354A (en) * | 2018-05-09 | 2018-08-10 | 绍兴上虞阿特兰迪电器有限公司 | A kind of sludge dewatering conveying device and dewatering |
| CN110375304A (en) * | 2019-07-05 | 2019-10-25 | 浦湘生物能源股份有限公司 | Town and country solid waste rubbish based on garbage combustion device cooperates with integrated processing system |
| CN110642469A (en) * | 2019-10-15 | 2020-01-03 | 怡灏环境技术有限公司 | Sewage advanced treatment system of low energy consumption |
| CN110563306A (en) * | 2019-10-18 | 2019-12-13 | 湖南清源智造设备有限公司 | Multiphase dehumidification sludge drying system |
| CN112174483A (en) * | 2020-10-14 | 2021-01-05 | 华能国际电力股份有限公司 | Thermal power generating unit sludge coupling power generation system utilizing flue gas drying |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103822213B (en) | 2015-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103822213B (en) | The dehydration of a kind of municipal sludge heat, waste heat drying and fluidized incineration integral process and system | |
| EP1799796B1 (en) | Slurry dewatering and conversion of biosolids to a renewable fuel | |
| RU2161168C2 (en) | Effective utilization of fuels and waste containing chlorine and moisture | |
| WO2022061958A1 (en) | Harmless and resourceful integrated treatment method and system for oil sludge | |
| CN101307244B (en) | Oil-making method of double-bed interactive and circling type for pyrolyzing sludge | |
| US10611657B2 (en) | Method and system for preparing fuel gas by utilizing organic waste with high water content | |
| CN101216244A (en) | Spiral and rotary type sludge drying shaping apparatus | |
| CN201206835Y (en) | Sludge treatment system utilizing pulverized coal boiler of power station | |
| CN105439404A (en) | Sludge dewatering, drying and incinerating system and method | |
| CN205313341U (en) | Sludge dewatering drying combustion system | |
| CN104692603A (en) | Integral treatment system for sludge | |
| CN101056968B (en) | Method of slurry dewatering and conversion of biosolids to a renewable fuel | |
| CN210176701U (en) | System for municipal sludge deep reduction treatment | |
| WO2019050431A1 (en) | Method for utilizing solid carbon-containing waste by pyrolysis and waste processing complex for implementing same | |
| CN103539325A (en) | Processing method and system for sludge containing oil | |
| CN101216177A (en) | Method for burning and processing sludge using generating plant pulverized coal boiler system | |
| CN202297333U (en) | Dehydration drying low-temperature pyrolysis sludge treatment device | |
| CN203823763U (en) | Integrated system of thermal dehydration, waste-heat drying and fluidized incineration of urban sludge | |
| CN103359906B (en) | Method for sludge drying and incineration by swill-cooked dirty oil | |
| CN203781995U (en) | Sludge treatment system | |
| CN109161563B (en) | Technical method for treating and utilizing antibiotic fungi residues | |
| JPH09257234A (en) | Supplying method of waste into boiler | |
| CN209721907U (en) | A kind of sludge treating system | |
| CN111718095A (en) | Municipal sludge pyrolysis carbonization treatment system and treatment process | |
| CN110777057A (en) | Urban organic solid waste cooperative treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200420 Address after: 116000 1st floor, no.13-5, Guanggu Road, Dalian Economic and Technological Development Zone, China (Liaoning) pilot Free Trade Zone, Dalian City, Liaoning Province Patentee after: DALIAN HUANZI TECHNOLOGY Co.,Ltd. Address before: Shahekou District of Dalian City, Liaoning province 116000 righteousness Street No. 8 Junan apartment Patentee before: DALIAN RONGDA RESOURCE CYCLIC UTILIZATION CONSULTING AND DESIGN Co.,Ltd. |