CN209721907U - A kind of sludge treating system - Google Patents
A kind of sludge treating system Download PDFInfo
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- CN209721907U CN209721907U CN201920038344.XU CN201920038344U CN209721907U CN 209721907 U CN209721907 U CN 209721907U CN 201920038344 U CN201920038344 U CN 201920038344U CN 209721907 U CN209721907 U CN 209721907U
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Abstract
The utility model relates to a kind of sludge treating system, which includes the first roller drier, second tin roller drying machine and third roller drier, fluidized bed furnace, First Heat Exchanger, the second heat exchanger, and the third roller drier is jacket type roller drier；The discharge port of first roller drier is connected to the feed inlet of second tin roller drying machine, and the discharge port of the second tin roller drying machine is connected to the feed inlet of third roller drier, and the discharge port of third roller drier is connected to fluidized bed furnace.The sludge treating system and method for the utility model, substantially using sludge self-heating as heat source, energy consumption is few, the treatment of wastes with processes of wastes against one another, and the flying dust scale of construction of generation is small, and can be used as building materials, sludge can be carried out resource utilization to the maximum extent；In addition, the utility model is not limited by production scale, have a large promotion value.
Description
Technical field
The utility model relates to a kind of sludge treating system more particularly to a kind of confession heat type sludge treating system and sides
Method.
Background technique
Sludge is the product after sewage treatment, is that one kind is made of organic debris, microorganism, inorganic particle, colloid etc.
Extremely complex heterogeneous body.The key property of sludge is that moisture content is high (up to 99% or more), and high organic content is held
Easily degenerate smelly, and particle is thinner, and specific gravity is smaller, jelly liquid.Contain large amount of organic in sludge, such as benzene, chlorophenol, more
Chlordiphenyl (PCB), polychlorinated dibenzofurans (PCDFs) and more chloro dibenzo dioxin (PCDDs) etc.；The diseases such as parasitic ovum
Pathogenic microorganism；The heavy metals such as cadmium, chromium, copper, nickel, mercury, lead and zinc, such as deal with improperly, it is easy to cause secondary pollution to environment.
China's sewage is divided into industry and urban life two parts, and Chinese environmental statistical yearbook data are shown, and 2009-2014
Year, China's industrial wastewater discharge amount maintained essentially in 20,000,000,000 tons/year or so, and town domestic sewage discharge amount increases from 35,400,000,000 tons
To 51,000,000,000 tons.Conservative estimation, annual 20000000000 tons according to industrial wastewater discharge amount, town domestic sewage discharge amount annual growth
4% calculates, then the year two thousand twenty China total amount of sewage discharge is up to 85,500,000,000 tons.2014, China's trade effluent was effectively treated rate and is
96%, it is 97% that rate, which is effectively treated, in town domestic sewage, and Industrial Waste Water Treatments amount in 2014 is 20,000,000,000 tons, town domestic sewage
Treating capacity is 49,500,000,000 tons.It is remained unchanged assuming that rate is effectively treated in sewage, then the year two thousand twenty Industrial Waste Water Treatments amount is 20,000,000,000 tons, city
Sanitary sewage disposal amount in town is 62,600,000,000 tons.
Under normal circumstances, sewage treatment plant, which handles 10,000 tons of sanitary sewages, can produce 5-8 tons of sludge of moisture content 80%, place
It manages 10,000 tons of trade effluents and generates 10-30 tons of sludge.It is calculated respectively according to 7 tons and 20 tons of unit outputs, then the year two thousand twenty China
Urban life sludge yield is 43,820,000 tons, and industrial sludge yield is 40,000,000 tons, amounts to 83,820,000 tons.Urban life is dirty
Mud yield accounts for more than the 50% of sludge total amount, and urban life sludge and part industrial sludge have compared with high heating value, provide according to the study
Material report, dry urban life sludge and papermaking, printing and dyeing sludge calorific value reach 2300~3000kcal/kg, other industrial sludges
Opposite calorific value is lower, such as burns the high heating value sludge dried as heat source for other low heat value sludge of heated drying, then will do
Low heat value sludge after dry is as building materials raw material, so that it may which all sludge are carried out resource utilization.It is special using sludge as fuel
It is not paper mill sludge and municipal sludge, its own contains a large amount of organic matter, can use directly as fuel after dry, but existing
Sludge drier, when drying sludge is typically necessary high-temperature flue gas as heat source, high-temperature flue gas greatly mostly from hot-blast stove,
Traditional hot-blast stove cannot burn low heat value sludge, for municipal sewage treatment plants, due to there is no heat source, and municipal administration
Sludge is difficult drying, and coal combustion is such as used to generate high-temperature flue gas as heat source, then drying cost is too high, economically uneconomical, and adopts
Use sludge as fuel, there are the following problems: although (1) municipal administration domestic sludge contains higher organic matter, there is sludge after drying
Effect calorific value can achieve 2000kcal/kg or more, but the sludge of this calorific value is difficult to use in conventional chain furnace boiler；(2) dirty
When mud available heating value reaches 2000kcal/kg, theoretically fluidized bed furnace be can be used, but the drying sludge of existing drying equipment production
It is mostly powdery or bulk, this powdery or blocky sludge, fluidized bed furnace are also difficult to use, and needing to be granulated could use；(3) with boiling
Kiln gas is risen directly as heat source, the thermal efficiency is very high, but fluidized bed furnace exhaust gas dust is more.In addition, as directly dry using high-temperature flue gas
Dry sludge, when sludge temperature is higher than 300 DEG C, the organic substance in sludge can be degraded into fuel gas, need to deal carefully with.
Utility model content
In view of the deficiencies of the prior art, it the purpose of this utility model is to provide a kind of sludge treating system and method, mentions
The dehydration efficiency and dehydration depth of high sludge, drying sludge, burning and recycling are solved in the case where not increasing energy cost
Utilizing question.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is as follows:
A kind of sludge treating system, including the first roller drier, second tin roller drying machine, third roller drier, boiling
Furnace, First Heat Exchanger, the second heat exchanger are risen, the third roller drier is jacket type roller drier；
The discharge port of first roller drier is connected to the feed inlet of second tin roller drying machine, and the second tin roller is dry
The discharge port of dry machine is connected to the feed inlet of third roller drier, and the discharge port of third roller drier is connected to fluidized bed furnace；
The gas outlet of fluidized bed furnace is connected to the first medium entrance of First Heat Exchanger, the first medium outlet of First Heat Exchanger
It is connected to the air inlet of the first roller drier, the gas outlet of the first roller drier is communicated with the first air-introduced machine, the first air inducing
The delivery outlet of machine is connected to the first medium entrance of the second heat exchanger, and the second medium entrance of the second heat exchanger is communicated with the atmosphere,
The second medium outlet of second heat exchanger has the second air-introduced machine, and the second of the delivery outlet of the second air-introduced machine and First Heat Exchanger
The second medium outlet of medium inlet connection, First Heat Exchanger is connected to the air inlet of the collet of third roller drier, third
The gas outlet of the collet of roller drier is connected to the air inlet of second tin roller drying machine, and the Volatile Gas of third roller drier goes out
Mouth is connected to fluidized bed furnace；
The gas outlet of the second tin roller drying machine is communicated with third air-introduced machine, the delivery outlet and fluidized bed furnace of third air-introduced machine
Connection；
Sludge crushing mechanism is equipped in first roller drier and/or second tin roller drying machine.
It optionally, further include third heat exchanger, the first deduster for being connected to the gas outlet of second tin roller drying machine, first
The gas outlet of deduster is connected to the first medium entrance of third heat exchanger, and the first medium outlet of third heat exchanger is drawn with third
The input port of blower is connected to, it is preferable that the discharge port of first deduster is connected to the feed inlet of third roller drier.
Optionally, first roller drier, second tin roller drying machine and third roller drier, fluidized bed furnace, first
The commercially available acquisition of heat exchanger, the second heat exchanger
It optionally, further include the first screw feed mechanism, first screw feed mechanism is used for second tin roller is dry
The material that the discharge port of machine discharge port and/or the first deduster is fallen is sent into third roller drier.Optionally, described second
Roller drier discharge port, the first deduster discharge port below be equipped with hopper for accepting material, hopper and the first spiral
Feeding mechanism mating reaction controls the rate of feed to third roller drier.
It optionally, further include the cooling column and pump being sequentially communicated, the second medium outlet of the third heat exchanger and cold water
Tower connection, the delivery outlet of the pump are connected to the second medium entrance of third heat exchanger.
First deduster can remove the dust in gas, reduce gas load, and gas enters third heat exchanger, in gas
Vapor is condensed, and gas flow can be greatly reduced, and improves the combustibility of gas, guarantees gas energy fully recovering and burning；
With sludge in the dry third heat exchanger of hot-air, reuse after vapor is removed, it is ensured that have enough oxygen to meet in gas
The needs that fluidized bed furnace burns；Cooling water, which is recycled, can reduce quantity of wastewater effluent.
It optionally, further include the second screw feed mechanism, second screw feed mechanism accepts the first roller drier
The material is simultaneously sent into second tin roller drying machine by material that discharge port is fallen.
Optionally, the second deduster is communicated between the gas outlet and the first air-introduced machine of first roller drier.It can
The discharge port of selection of land, the second deduster is connected to the feed inlet of second tin roller drying machine.
It optionally, further include exhaust treatment system, the exhaust treatment system includes the spray column being sequentially communicated, deodorizing tower
And chimney, the first medium outlet of the air inlet of the spray column and the second heat exchanger.
Optionally, the First Heat Exchanger, the second heat exchanger are vertical heat exchanger, are further vertical gas heat exchange
Device；The third heat exchanger is condensing tower.
Optionally, deduster is cyclone dust collectors or bag filter.Preferably, the first deduster is bag filter,
Second deduster is cyclone dust collectors.
A kind of method for sludge treatment is carried out using system as described above, is included the following steps:
Start the first air-introduced machine, the second air-introduced machine, third air-introduced machine, the first roller drier, second tin roller drying machine and
Third roller drier, lights a fire to fluidized bed furnace, while inputting moisture content into the first roller drier is 55-65wt%'s
Pending mud obtains the first semi-dry sludge that moisture content is 42-48wt% in the discharge port of the first roller drier；
First semi-dry sludge is delivered in second tin roller drying machine, is obtained in the discharge port of second tin roller drying machine
Moisture content is the second semi-dry sludge of 23-27wt%；
Second semi-dry sludge is delivered in third roller drier, is obtained in the discharge port of third roller drier
Moisture content is the dry particle sludge of 4-6wt%；
To burn in the dry sludge input fluidized bed furnace, and obtain flue gas and flying dust, flue gas sequentially enter First Heat Exchanger,
After first roller drier, the second heat exchanger, into postprocessing working procedures.
In the system of the utility model, drying sludge point three sections of dryings, this three stage is dry to be had a characteristic that the
One, it is provided with sludge crushing mechanism in two-stage drying equipment, allows sludge to be more advantageous to drying, but in final stage drying equipment not
If sludge crushing mechanism, can be allowed in this way when high temperature drying section is dry it is dry after sludge to keep partial size be 3~12mm, can be with
Meet fluidized bed furnace boiling and burn and require, sludge burn-off rate reaches 99% when burning, and the flying dust that burning process generates is few, and slag is all fallen
To furnace lower curtate, optionally, sent clinker to outside furnace body by slagging tap spiral；Incineration temperature is maintained at 800~900 DEG C, Ke Yiyou
Effect decomposes the harmful substances such as dioxin, and can guarantee noncoking when sludge incineration, protects effective use of furnace body, passes through first
Heat exchanger, on the one hand by 800 DEG C of -900 DEG C of cooling high-temperature fumes of fluidized bed furnace generation to 450 DEG C~480 DEG C, while again by air
370 DEG C~410 DEG C have been heated to, and has used concurrent drying mode, has not allowed sludge temperature higher than 300 DEG C as far as possible, it is dry reaching
Reduce mud organic substance degradation while dry purpose；Using three sections of drying fuel sludge methods, guarantee final moisture percentage in sewage sludge
For 5wt% or so, be conducive to burn；Third roller drying built-in temperature has been more than 300 DEG C, using indirect heating drying mode,
Sludge is allowed to degrade at a higher temperature, the fuel gas of generation individually guides to fluidized bed furnace burning, and it is negative to reduce condensation water pollution
Lotus, it is not only more environmentally-friendly, the total heat utilization efficiency of system also can be improved.
800 DEG C of -900 DEG C of high-temperature flue gas that fluidized bed furnace generates, temperature drops to 450 DEG C~480 DEG C after First Heat Exchanger
As the drying source of the first roller drier, but this temperature or relatively high, optionally, in order to reduce organic matter in sludge
It decomposes, reduces condensed water pollutional load, 50% tail gas of first roller drier after dedusting is guided into the first roller and is done
Dry machine entrance mixes with the flue gas after cooling and is used as drying source, not only more environmentally friendly in this way, and the total heat utilization of system also can be improved
Rate；The gas that temperature is 115 DEG C~125 DEG C is come out from the first roller drier, second is entered after the second deduster dedusting
Heat exchanger is cooled to 90 DEG C~95 DEG C with normal temperature air in the second heat exchanger, on-condensible gas is then guided to spray column
Processing, can reduce gas flow to the maximum extent, reduce the equipment investment of subsequent exhaust gas processing device, after vent gas treatment,
Second level mark of the every pollutant index of institute's discharge gas at or below standard GB/T 14554-93 and GB16297-1996
It is quasi-；It is that 80 DEG C~90 DEG C of low temperature hot air guides to First Heat Exchanger and continues to heat that temperature, which will be heated, after heat exchange can be improved
For the temperature of hot-air to 370 DEG C~410 DEG C, the heat source dry as third roller drier indirect heating improves drying sludge
Efficiency, energy saving, temperature is 260 DEG C~280 DEG C when which leaves after third roller drier collet, subsequently enters the
Two roller driers, directly with sludge contact drying, which leaves second tin roller drying machine, and temperature drops to 120 DEG C, by removing
Temperature further drops to 80~90 DEG C after dirt, heat exchange removal vapor, finally guides to fluidized bed furnace burning, designs in this way, not only
On-condensible gas can be introduced into fluidized bed furnace and be burnt up, improve the total heat utilization efficiency of system, it is more environmentally-friendly, and can guarantee air
In have higher oxygen content, be conducive to the firing efficiency of fluidized bed furnace, also do not need deliberately to increase furnace body volume.
Generally speaking, flue gas and hot-air are carried out reasonable distribution, weight by the sludge treating system and method for the utility model
Multiple to utilize, heat utilization efficiency is high, carries out stage drying to sludge, makes sludge dry under conditions of more environmentally friendly, gained sludge is aqueous
Rate is low, and form is graininess, is conducive to sludge incineration and reduces flying dust, dry sludge is sent directly at a higher temperature
Incinerator burns, and compared with sludge carbonization, heat loss is less, and heat utilization efficiency is higher, keeps sludge to burn under reasonable high temperature, no
But sludge incineration coking phenomenon can also be avoided to occur with resolving harmful gas, be returned after vapor in gas is condensed out
With or processing, effectively reduce equipment volume and operating cost.For this system using sludge incineration heat as heat source, energy consumption is few,
The flying dust scale of construction of the treatment of wastes with processes of wastes against one another, generation is small, and can be used as building materials, sludge can be carried out resource utilization to the maximum extent；In addition,
The utility model is not limited by production scale, is had a large promotion value.
Detailed description of the invention
Fig. 1 is the structure diagram of the sludge treating system of the utility model the first embodiment.
Specific embodiment
The utility model is described in detail below with reference to embodiment.It should be noted that in the absence of conflict, this
The feature in embodiment and embodiment in utility model can be combined with each other.For sake of convenience, hereinafter such as occur "upper",
"lower", "left", "right" printed words only indicate consistent with the upper and lower, left and right direction of attached drawing itself, do not rise to limit to structure and make
With.
As shown in Figure 1, a kind of sludge treating system, including the first roller drier 10, second tin roller drying machine 7 and third
Roller drier 8, fluidized bed furnace 11, First Heat Exchanger 12, the second heat exchanger 15, the third roller drier are jacket type roller
Drying machine；
The discharge port of first roller drier 10 is connected to the feed inlet of second tin roller drying machine 7, second rolling
The discharge port of drum drier is connected to the feed inlet of third roller drier, and the discharge port and fluidized bed furnace of third roller drier connect
It is logical；
The gas outlet of fluidized bed furnace is connected to the first medium entrance of First Heat Exchanger 12, and the first medium of First Heat Exchanger goes out
It mouthful being connected to the air inlet of the first roller drier, the gas outlet of the first roller drier is communicated with the first air-introduced machine 19, and first
The delivery outlet of air-introduced machine is connected to the first medium entrance of the second heat exchanger, and the second medium entrance and atmosphere of the second heat exchanger connect
Logical, the second medium outlet of the second heat exchanger has the second air-introduced machine 13, the delivery outlet and First Heat Exchanger of the second air-introduced machine
The connection of second medium entrance, the second medium outlet of First Heat Exchanger and the air inlet of the collet of third roller drier connect
Logical, the gas outlet of the collet of third roller drier is connected to the air inlet of second tin roller drying machine, third roller drier
Volatile Gas outlet is connected to fluidized bed furnace；
The gas outlet of the second tin roller drying machine is communicated with third air-introduced machine 5, the delivery outlet of third air-introduced machine 5 and boiling
Furnace connection；
Sludge crushing mechanism is equipped in first roller drier and/or second tin roller drying machine.
It further include third heat exchanger 3, the first deduster 4 being connected to the gas outlet of second tin roller drying machine, the first dedusting
The gas outlet of device is connected to the first medium entrance of third heat exchanger, first medium outlet and the third air-introduced machine of third heat exchanger
Input port connection, it is preferable that the discharge port of first deduster is connected to the feed inlet of third roller drier.
It further include the first screw feed mechanism 6, first screw feed mechanism is for discharging second tin roller drying machine
The material that the discharge port of mouth and/or the first deduster is fallen is sent into third roller drier.The second tin roller drying machine goes out
Material mouth, the first deduster discharge port below be equipped with hopper 9 for accepting material.
It further include the cooling column 1 being sequentially communicated and pump 2, second medium outlet and the cooling column of the third heat exchanger connect
Logical, the delivery outlet of the pump is connected to the second medium entrance of third heat exchanger.
It further include the second screw feed mechanism 20, second screw feed mechanism accepts the first roller drier discharge port
The material is simultaneously sent into second tin roller drying machine by the material that falls.
The second deduster 14 is communicated between the gas outlet of first roller drier and the first air-introduced machine 19.Second removes
The discharge port of dirt device is connected to the feed inlet of second tin roller drying machine.Optionally, by the 5th air-introduced machine 21 by the first air-introduced machine
The partial fume in exit introduces in the first roller drier.
It further include exhaust treatment system, the exhaust treatment system includes the spray column 16 being sequentially communicated, 17 and of deodorizing tower
The first medium outlet of chimney 18, the air inlet of the spray column and the second heat exchanger.
The First Heat Exchanger 12, the second heat exchanger 15 are vertical heat exchanger；The third heat exchanger is condensing tower.
For handling certain municipal sewage treatment plants sludge and certain factory industry sludge to the utility model carry out into
One step explanation, municipal administration sewage treatment plants moisture percentage in sewage sludge used are 65wt%, and paper mill sludge moisture content is 55wt%, mixing
Moisture percentage in sewage sludge is 60% afterwards.When implementing to start, using the coal of 5000kcal/kg as fuel, will boil kiln gas temperature after coal combustion
Degree control at 600 DEG C -650 DEG C, then adjust the flue-gas temperature after hot air temperature is 300 DEG C -360 DEG C and heat exchange be 300 DEG C -
350 DEG C start into mud, input above-mentioned sludge to the first roller drier, adjust the revolving speed of each roller drier, it is ensured that it is dried
Moisture percentage in sewage sludge reaches technique requirement, when second tin roller drying machine has sludge to enter, improves fluidized bed furnace flue-gas temperature to 800
DEG C -1000 DEG C, by First Heat Exchanger, air themperature is heated to 380 DEG C~410 DEG C, the flue gas temperature after First Heat Exchanger
Degree drops to 450 DEG C~480 DEG C, and the first roller drier inputiing mud volume of adjustment is to normally, and it is dry to enter third roller for high temperature air at this time
Temperature in dry machine collet reaches normally, starts largely to gasify into 8 intracorporal sludge of third roller drier, and pass through by
8 cylinder of third roller drier of heating is dried to obtain the dry particle sludge that moisture content is 4%~6wt%, by dry particle
Sludge is admitted to fluidized bed furnace as fuel with the air that third air-introduced machine exports by second pipe and burns heat supply, in addition, third
The gas that drying sludge process generates in the cylinder of roller drier is introduced directly into fluidized bed furnace and fuel is also used as to burn heat supply, warp
The low temperature hot air of third roller drier is crossed, temperature is reduced to 330 DEG C~350 DEG C, this low temperature hot air enters second tin roller
It is used as heat source in the cylinder of drying machine, is directly contacted with sludge, the fuel sludge that dry moisture content is 45% or so, this sludge warp
Moisture content drops to 25wt% or so after crossing the drying of second tin roller drying machine, into the first screw feed mechanism, is sent by the first spiral
Material mechanism is sent to third roller drier and continues drying, the gas that the temperature come out from second tin roller drying machine is 115 DEG C~125 DEG C
Body enters third heat exchanger after the first deduster dedusting, and the first deduster recycles sludge and enters the first screw feed mechanism,
Also third roller drier is sent to by the first screw feed mechanism and continues drying, cooled in third heat exchanger with cold water
90 DEG C~95 DEG C, then on-condensible gas is guided in fluidized bed furnace and is burned, while the dirty hot water condensed out is guided into sewage treatment
System reprocessing, the clear hot-water being heated are recycled after being then cooled to cooling column.800 DEG C of fluidized bed furnace generation-
1000 DEG C of high-temperature flue gas, temperature drops to 450 DEG C~480 DEG C after First Heat Exchanger, this flue gas enters the first roller drier
Cylinder in be used as heat source, it is 115 DEG C that the temperature for convection drying sludge, come out from the first roller drier contact with sludge
~125 DEG C of gas, after the second deduster dedusting enter the second heat exchanger, in the second heat exchanger with normal temperature air by its
90 DEG C~95 DEG C are cooled to, on-condensible gas is then guided into spray column processing, the dirty hot water condensed out is guided into sewage treatment
System reprocessing, being heated temperature is that 80 DEG C~90 DEG C of low temperature hot air then guides to vertical heat exchanger and continues heating and uses.Into
The on-condensible gas for entering spray column carries out spray-absorption purification with the sodium hydroxide lye of concentration 10%, after spray-absorption not
Solidifying gas, is introduced into deodorizing tower active carbon deodorizing, and the on-condensible gas after processing is up to standard is finally discharged into atmosphere.
Below the utility model is unfolded to further illustrate for 50 ton/days of (desiccation) mud handling capacity, relevant parameter
It is as shown in table 1:
Table 1
Two, sludge drying process calculates
2.1 design conditions
Dry mud handling capacity X0:2083.33kg/h
The initial average moisture content S0:60% of sludge
Evaporation drying amount Ld:1206.14kg/h
Dry post fuel sludge quantity X3:877.19kg/h (moisture content 5%)
T0:20 DEG C of ambient temperature
2.2 calculating
2.2.1 needing heat QT
A) dry one section of institute calorific requirement Q1T is calculated:
T1:70 DEG C of material outlet temperature
A) moisture evaporates calorific requirement Q1a in raw material:
Q1a=X0*S0* (T1-T0)=62499.9kcal/h
B) the heat Q1b that one section of moisture evaporation needs:
70 DEG C of evaporation latent heat Cj1:557.30kcal/kg
One section of 70 DEG C of moisture evaporates institute's calorific requirement:
Q1b=Cj1*L1=316641.14kcal/h
C) steam temperature rising needs heat Q1c:
Vapor specific heat Cjw=0.45kcal/kg
T:120 DEG C of 1 Outlet Gas Temperature of roller machine
Q1c=L1*Cj* (T-T1)=13188.83kcal/h
D) sludge temperature rising needs heat Q1d
Sludge specific heat Cjn=0.40kcal/kg
T1:70 DEG C of sludge temperature
Q1d=X0* (1-S1) * Cjn* (T1-T0)=57291.58kcal/h
E) add up to heat Q1
Q1=Q1a+Q1b+Q1c+Q1d=449621.45kcal/h
F) practical necessary heat Q1T
Dry the thermal efficiency (k): 80%
Q1T=Q1/k=562026.81kcal/h
B) dry two sections of institute calorific requirement Q2T are calculated:
T2:90 DEG C of material outlet temperature
A) moisture heats calorific requirement Q2a in two sections of raw materials:
Q2a=X1*S1* (T2-T1)=13636.44kcal/h
B) the heat Q2b that moisture evaporation needs in two sections of raw materials:
90 DEG C of evaporation latent heat Cj2:546.12kcal/kg
Two sections of 90 DEG C of moisture evaporate institute's calorific requirement:
Q2b=Cj2*L2=220659.79kcal/h
C) steam temperature rising needs heat Q2c:
Vapor specific heat Cjw=0.45kcal/kg
T:120 DEG C of 2 Outlet Gas Temperature of roller machine
Q2c=L2*Cj w* (T-T2)=5454.68kcal/h
D) sludge temperature rising needs heat Q2d
Sludge specific heat Cjn=0.40kcal/kg
T2:90 DEG C of sludge temperature
Q2d=X1* (1-S2) * Cjn* (T2-T1)=9090.96kcal/h
E) add up to heat Q2
Q2=Q2a+Q2b+Q2c+Q2d=248841.87kcal/h
F) practical necessary heat Q2T
Dry the thermal efficiency (k): 80%
Q2T=Q2/k=311052.34kcal/h
B) dry three sections of institute calorific requirement Q3T are calculated:
T3:300 DEG C of material outlet temperature
A) moisture is heated to 100 DEG C of calorific requirement Q3a in three sections of raw materials:
Q3a=X2*S2* (100-T2)=1111.11*0.25* (100-90)
=2777.78kcal/h
B) the heat Q3b that moisture evaporation needs in three sections of raw materials:
100 DEG C of evaporation latent heat Cj3:539kcal/kg
Three sections of 100 DEG C of moisture evaporate institute's calorific requirement:
Q3b=Cj3*L3=539*233.92
=126082.92kcal/h
C) steam temperature rising needs heat Q3c:
Vapor specific heat Cjw=0.45kcal/kg
Gas into boiling Tv2:330 DEG C of furnace temperature
Q3c=L3*Cj* (Tv2-100)=233.92*0.45*230
=24210.72kcal/h
D) sludge temperature rising needs heat Q3d
Sludge specific heat Cjn=0.40kcal/kg
T3:300 DEG C of sludge temperature
Q3d=X2* (1-S3) * Cjn* (T3-T2)=1111.11* (1-0.05) * 0.40* (300-90)
=88666.58kcal/h
E) add up to heat Q3
Q3=Q3a+Q3b+Q3c+Q3d=241737.99kcal/h
F) practical necessary heat Q3T
Dry the thermal efficiency (k): 80%
Q3T=Q3/k=302172.49kcal/h
B) drying sludge total amount of heat QT actually required
QT=Q1T+Q2T+Q3T
=562026.81+311052.34+302172.49=1175251.64kcal/h
2.2.2 providing heat Qc
A) organic gas burns the heat Q1c generated
Organic matter calorific value Cy:4000kcal/kg
Volatile organic compounds matter content is (M) of over dry sludge quantity: 20%
Sludge oven-dry weight Yd:833.33kg/h
Q1c=Yd*M*Cy=833.33*0.20*4000
=666664kcal/h
B) the heat Q2c that sludge incineration provides
Dewatered sludge amount X3:877.19kg/h
Dewatered sludge calorific value Cx:2000kcal/kg
Q2c=X3*Cx=1754380kcal/h
B it is 50% (empirical value) that) fluidized bed furnace, which burns total heat utilization efficiency,
Qc=(Q1c+Q2c) * 0.5=1210522kcal/h
2.2.3 practical thermal balance Qc-QT
=1210522-1175251.64=35270.36kcal/h
As it can be seen that 60% pending mud is not higher than for average moisture content, if sludge calorific value is not less than after dry
2000kcal/kg, the hot overall utilization of sludge incineration reach 50%, and the heat that sludge incineration provides can meet drying sludge
It is required that and heat there are also more than needed.It was verified that sludge many for municipal sludge, paper mill sludge and printing and dyeing sludge etc., sludge
Its calorific value is all not less than 2000kcal/kg after drying, and the hot overall utilization of sludge incineration is not less than 50%.
To sum up, the processing system of the utility model and method continuity are strong, and degree of dehydration is high, are not necessarily to external heat source, significantly
Energy cost is reduced, the various sludge organic assemblings for having certain calorific value can be dried.
The content that above-described embodiment illustrates should be understood as that these embodiments are only used for being illustrated more clearly that the utility model,
Rather than limitation the scope of the utility model, after having read the utility model, those skilled in the art are practical new to this
The modification of the various equivalent forms of type each falls within the application range as defined in the appended claims.
Claims (9)
1. a kind of sludge treating system, which is characterized in that including the first roller drier (10), second tin roller drying machine (7),
Three roller driers (8), fluidized bed furnace (11), First Heat Exchanger (12), the second heat exchanger (15), the third roller drier are
Jacket type roller drier；
The discharge port of first roller drier (10) is connected to the feed inlet of second tin roller drying machine (7), second rolling
The discharge port of drum drier is connected to the feed inlet of third roller drier, and the discharge port and fluidized bed furnace of third roller drier connect
It is logical；
The gas outlet of fluidized bed furnace is connected to the first medium entrance of First Heat Exchanger (12), the first medium outlet of First Heat Exchanger
It being connected to the air inlet of the first roller drier, the gas outlet of the first roller drier is communicated with the first air-introduced machine (19), and first
The delivery outlet of air-introduced machine is connected to the first medium entrance of the second heat exchanger, and the second medium entrance and atmosphere of the second heat exchanger connect
Logical, the second medium outlet of the second heat exchanger has the second air-introduced machine (13), the delivery outlet of the second air-introduced machine and the first heat exchange
The second medium entrance of device is connected to, and the second medium outlet of First Heat Exchanger and the air inlet of the collet of third roller drier connect
Logical, the gas outlet of the collet of third roller drier is connected to the air inlet of second tin roller drying machine, third roller drier
Volatile Gas outlet is connected to fluidized bed furnace；
The gas outlet of the second tin roller drying machine is communicated with third air-introduced machine (5), the delivery outlet of third air-introduced machine (5) and boiling
Furnace connection；
Sludge crushing mechanism is equipped in first roller drier and/or second tin roller drying machine.
2. system according to claim 1, which is characterized in that further include third heat exchanger (3) and second tin roller drying machine
Gas outlet connection the first deduster (4), the gas outlet of the first deduster is connected to the first medium entrance of third heat exchanger,
The first medium outlet of third heat exchanger is connected to the input port of third air-introduced machine.
3. system according to claim 2, which is characterized in that the discharge port and third roller drying of first deduster
The feed inlet of machine is connected to.
4. system according to claim 2, which is characterized in that further include the first screw feed mechanism (6), first spiral shell
The material that rotation feeding mechanism falls the discharge port of second tin roller discharge hole of drying machine and/or the first deduster is sent into third roller
In drying machine.
5. system according to claim 2, which is characterized in that further include the cooling column (1) being sequentially communicated and pump (2), institute
The second medium outlet for stating third heat exchanger is connected to cooling column, and the second medium of the delivery outlet and third heat exchanger of the pump enters
Mouth connection.
6. system according to claim 1, which is characterized in that it further include the second screw feed mechanism (20), described second
Screw feed mechanism accepts the material that the first roller drier discharge port is fallen and the material is sent into second tin roller drying machine.
7. system according to claim 1, which is characterized in that the gas outlet of first roller drier and the first air inducing
The second deduster (14) are communicated between machine (19).
8. system according to claim 1-7, which is characterized in that it further include exhaust treatment system, the tail gas
Processing system includes the spray column (16), deodorizing tower (17) and chimney (18) being sequentially communicated, the air inlet of the spray column and
The first medium outlet of two heat exchangers.
9. system according to claim 1-7, which is characterized in that the First Heat Exchanger (12), the second heat exchange
Device (15) is vertical heat exchanger；The third heat exchanger is condensing tower.
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|---|---|---|---|
| CN201920038344.XU CN209721907U (en) | 2019-01-10 | 2019-01-10 | A kind of sludge treating system |
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| CN201920038344.XU CN209721907U (en) | 2019-01-10 | 2019-01-10 | A kind of sludge treating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534654A (en) * | 2019-01-10 | 2019-03-29 | 湖南碧汇泉环保科技有限公司 | A kind of sludge treating system and method |
| CN111678152A (en) * | 2020-06-29 | 2020-09-18 | 山东龙之源节能环保科技有限公司 | Indirect sludge drying and incinerating system and drying and incinerating method thereof |
-
2019
- 2019-01-10 CN CN201920038344.XU patent/CN209721907U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534654A (en) * | 2019-01-10 | 2019-03-29 | 湖南碧汇泉环保科技有限公司 | A kind of sludge treating system and method |
| CN109534654B (en) * | 2019-01-10 | 2024-02-09 | 湖南碧汇泉环保科技有限公司 | Sludge treatment system and method |
| CN111678152A (en) * | 2020-06-29 | 2020-09-18 | 山东龙之源节能环保科技有限公司 | Indirect sludge drying and incinerating system and drying and incinerating method thereof |
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