CN109458620A - Reduce the compound additive and its application method of sludge incineration fine particle production quantity - Google Patents
Reduce the compound additive and its application method of sludge incineration fine particle production quantity Download PDFInfo
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- CN109458620A CN109458620A CN201811366266.2A CN201811366266A CN109458620A CN 109458620 A CN109458620 A CN 109458620A CN 201811366266 A CN201811366266 A CN 201811366266A CN 109458620 A CN109458620 A CN 109458620A
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- sludge
- fine particle
- diatomite
- compound additive
- quick lime
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
Abstract
A kind of compound additive and its application method reducing sludge incineration fine particle production quantity, belongs to sludge incineration processing technology field.The compound additive of the reduction sludge incineration fine particle production quantity is the mixture of quick lime and diatomite, in mass ratio, quick lime: diatomite=(0.25~1): 1.Its application method are as follows: mix quick lime and diatomite, in the sludge powder that partial size after drying is added is 150 μm~500 μm, it is burned together, incineration temperature is 750~950 DEG C, obtained fine particle production quantity is decreased obviously, and under the high temperature conditions, quick lime can react with diatomite, form the calcium silicates with absorption property.In addition, the rich reserves of quick lime and diatomite, cheap, transport and storage are convenient, can effectively reduce the cost to the control of sludge incineration fine particle.
Description
Technical field
The present invention relates to sludge incineration processing technology fields, and in particular to a kind of reduction sludge incineration fine particle production quantity
Compound additive and its application method.
Background technique
With the quickening of China's urbanization step, the yield and treating capacity of municipal sewage increase sharply, but following
Sludge bring secondary pollution again.Treatment of Sludge and the purpose of disposition with minimizing, recycling, it is harmless turn to principle, mainly
Method of disposal has Sludge landfill method, sludge composting method and sludge incineration method.Wherein, Sludge landfill method needs to occupy a large amount of soils,
And deal with the pollution that may cause soil and groundwater improperly.Sludge composting method is with low energy consumption, supports in recoverable sludge
The advantages that dividing, but there are the danger of pathogen diffusion and heavy metal pollution.Compared to compost and landfill, the processing of sludge incineration method is not
The minimizing of sludge and innoxious can be only realized to the maximum extent, and auxiliary product can also be made in incineration residue, be one
The effective sludge treating method of kind.Sludge incineration method has processing speed fast, and treating capacity is big, and occupied area is small, does not need long-term
Storage, can on-site incineration, the features such as not needing long-distance transportation, can recover energy for heat supply or power generation.Flying dust is to burn
The pollutant generated in the process, yield are about the 0.5~3% of burning amount.Contain high concentration and height in flying ash particulate matter
The harmful substances such as the heavy metal of leaching concentration and highly toxic dioxin, if imappropriate processing or method of disposal, have
Evil substance will in the ecosystem Transport And Transformation, and then polluted underground water, soil and air, finally endanger human health.Due to
The partial size very little of fine particle, the residence time in atmospheric environment is long, and about 7~30 days, and also it is more liquid, hold
It is easily inhaled into and is deposited inside mankind's alveolar and be difficult to be breathed out.Along with fine particle has biggish specific surface area, it is easy
The heavy metal generated during sludge incineration is adsorbed, human body is caused greatly to injure.
Currently, coal-fired, biomass-burning is largely focused on to the fine particle research that burning generates both at home and abroad, and to sludge
The research of fine particle caused by burning is less.Traditional dust removal method has the cleaners such as bag-type dust and electric precipitation, but
It is lower to the removal efficiency of fine particle and superfine particulate matter and higher cost.
Such as CN106281564A, by the way that diatomite modified is modified as hydrochloric Acid Modification diatomite powder and poly- hydroxy Al
Diatomite powder, reduces the production quantity of fine particle by certain physically or chemically effect, but hydrochloric acid and poly- hydroxy Al
Preparation cost is higher, is unsuitable for large-scale use.
Summary of the invention
In view of the drawbacks of the prior art, the present invention provides a kind of compound adding for reducing sludge incineration fine particle production quantity
Add agent and its application method, the compound additive of the reduction sludge incineration fine particle production quantity be by quick lime and diatomite by
According to predetermined ratio mixing be used as additive, using the compound additive reduce sludge incineration fine particle generate method, be by
After compound additive and sludge are mixed according to scheduled mass ratio, it is added in fluidized bed burns together, in combustion process, addition
Quick lime (CaO) can not only reduce the production quantity of fine particle, but also under the high temperature conditions, quick lime can be sent out with diatomite
Raw reaction, forms the calcium silicates with absorption property.In addition, the rich reserves of quick lime and diatomite, cheap, transport and
Storage is convenient, can effectively reduce the cost to the control of sludge incineration fine particle.
A kind of compound additive of reduction sludge incineration fine particle production quantity of the invention is quick lime and diatomite
Mixture, in mass ratio, quick lime: diatomite=(0.25~1): 1, preferably 0.75:1.
A kind of application method of the compound additive of reduction sludge incineration fine particle production quantity of the invention, including it is following
Step:
Step 1: preparing compound additive
By quality proportioning, quick lime and diatomite are mixed, obtain the diatomite for being mixed with quick lime；
Step 2: sludge pre-treatment
Sludge is dried, grind, is sieved, the sludge powder that partial size is 150 μm~500 μm is obtained；
Step 3: compound additive and sludge mixing
The diatomite for being mixed with quick lime and sludge powder are sufficiently mixed, the sludge powder for being mixed with additive is obtained；Wherein, it is mixed with
The mass percent that the diatomite of quick lime accounts for sludge silty amount is 3%~9%；
Step 4: burning
Will be mixed with compound additive sludge powder be added sludge incinerator in, burned, incineration temperature be 750~
950 DEG C, burning atmosphere is air atmosphere, the fine particle after being burned.
In the step 2, the drying, drying temperature is 105 DEG C~200 DEG C.
In the step 4, the sludge incinerator is one of sludge incinerator, fluidized bed, is preferably flowed
Change bed.
It is thin that reduction sludge incineration is carried out using the compound additive of reduction sludge incineration fine particle production quantity of the invention
Particulate matter generates, analytic process are as follows:
Fine particle after burning is entered into cyclone separator with flue gas, separation diameter is greater than 10 μm of particulate matter, remaining
Fine particle and superfine particulate matter enter in the charged ram of low pressure (ELPI) with flue gas, to the fine particle of different-diameter into
Row classification is collected, then analysis statistics, is reduced the function and effect of the additive of sludge incineration fine particle generation.
The compound additive and its application method of a kind of reduction sludge incineration fine particle production quantity of the invention are beneficial
Effect are as follows:
1, the present invention is by being added the compound additive for being mixed with the diatomite of quick lime, in turn during sludge incineration
Sludge incineration fine particle production quantity is reduced, during the mechanism of action is sludge incineration, addition quick lime (CaO) not only can be with
The production quantity of fine particle is reduced, and under the high temperature conditions, quick lime can react with diatomite, being formed has absorption
The calcium silicates of performance.
2, the rich reserves of quick lime and diatomite, cheap, transport and storage are convenient, can effectively reduce to dirt
Mud burns the cost of fine particle control.
Detailed description of the invention
Fig. 1 is that the compound additive of quick lime and diatomite different ratio generates fine graineds to 250~500 μm of sludge incinerations
The impact effect figure of object.
Fig. 2 is that the compound additive of quick lime and diatomite different ratio generates thin to 187.5~250 μm of sludge incinerations
The impact effect figure of grain object.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
Embodiment 1
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=0.25:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, comprising the following steps:
Step 1: preparing compound additive
By quality proportioning, quick lime and diatomite are mixed, obtain the diatomite for being mixed with quick lime；
Step 2: sludge pre-treatment
Sludge is placed in 105 DEG C of baking ovens after drying, is ground dry sludge using grinder, and crosses 30 meshes
Son is sieved, and the sludge powder that partial size is 250 μm~500 μm is obtained；
Step 3: compound additive and sludge mixing
The sludge powder that the diatomite for being mixed with quick lime and partial size are 250 μm~500 μm is sufficiently mixed, obtains being mixed with addition
The sludge powder of agent；Wherein, it is 6% that the diatomite for being mixed with quick lime, which accounts for the mass percent of sludge silty amount,；
Step 4: burning
It will be mixed with the sludge powder of compound additive, is added in fluidized bed with the feed rate of 20g/min, is burned, burnt
Burning temperature is 850 DEG C, and burning atmosphere is air atmosphere, the fine particle after being burned.
Step 5: analysis
Fine particle after burning is flowed through into cyclone separator with flue gas, kinetic diameter in flue gas is filtered out and is greater than 10 μm
Particulate matter, remaining fine particle and superfine particulate matter enter the charged ram of low pressure (ELPI) with flue gas, by fine particle
Be divided into 14 grades be respectively as follows: 6~16.7nm, 16.7~27.5nm, 27.5~56nm, 56~94.2nm, 94.2~156nm, 156~
261nm, 261~382nm, 382~613nm, 613~948nm, 948~1600nm, 1.6~2.39 μm, 2.39~3.99 μm,
3.99~6.68 μm, 6.68~9.91 μm, acquisition time 30min.
Embodiment 2
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=0.5:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, with embodiment 1, difference
Be in, in mass ratio, quick lime: diatomite=0.5:1.
Embodiment 3
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=0.75:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, with embodiment 1, difference
Be in, in mass ratio, quick lime: diatomite=0.75:1.
Embodiment 4
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=1:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, with embodiment 1, difference
Be in, in mass ratio, quick lime: diatomite=1:1.
According in embodiment 1, embodiment 2, embodiment 3, embodiment 4, the quality proportioning system of different quick limes and diatomite
The impact effect that standby compound additive generates fine particle to 250~500 μm of sludge incinerations is analyzed, obtained impact effect figure
Fig. 1 is seen, from Fig. 1, it can be seen that in the content range studied, with the increase of compound additive ratio, fine particle
Production quantity be also reduce, when the ratio of compound additive be 0.75:1 when, the production quantity of fine particle is the smallest.
Comparative example 1
A kind of processing method of sludge, comprising the following steps:
Step 1: sludge pre-treatment
Sludge is placed in 105 DEG C of baking ovens after drying, is ground dry sludge using grinder, and crosses 30 meshes
Son is sieved, and the sludge powder that partial size is 250 μm~500 μm is obtained；
Step 2: burning
The sludge powder for being 250 μm~500 μm by partial size is added in fluidized bed with the feed rate of 20g/min, is burnt
It burns, incineration temperature is 850 DEG C, and burning atmosphere is air atmosphere, the fine particle after being burned.
Step 3: analysis
Fine particle after burning is flowed through into cyclone separator with flue gas, kinetic diameter in flue gas is filtered out and is greater than 10 μm
Particulate matter, remaining fine particle and superfine particulate matter enter the charged ram of low pressure (ELPI) with flue gas, by fine particle
Be divided into 14 grades be respectively as follows: 6~16.7nm, 16.7~27.5nm, 27.5~56nm, 56~94.2nm, 94.2~156nm, 156~
261nm, 261~382nm, 382~613nm, 613~948nm, 948~1600nm, 1.6~2.39 μm, 2.39~3.99 μm,
3.99~6.68 μm, 6.68~9.91 μm, acquisition time 30min.
The fine particle that embodiment 1, embodiment 2, embodiment 3, embodiment 4 and comparative example obtain is collected and is counted
Analysis, as a result:
It measures under experimental conditions, is not added with the sludge (comparative example 1) of additive, burns the PM of generation0.1、PM1、PM2.5、
PM10Particle diameter distribution (1/cm3) it is respectively 152212.04,11306.52,11128.85,7577.75；
The sludge (embodiment 1) that quick lime and diatomite mixing ratio are 0.25:1, burns the PM of generation0.1、PM1、PM2.5、
PM10Particle diameter distribution (1/cm3) it is respectively 13009.08,6043.70,1404.61,1327.97；
The sludge (embodiment 2) that quick lime and diatomite mixing ratio are 0.5:1, burns the PM of generation0.1、PM1、PM2.5、
PM10Particle diameter distribution (1/cm3) it is respectively 11513.79,4703.07,1320,1021；
The sludge (embodiment 3) that quick lime and diatomite mixing ratio are 0.75:1, burns the PM of generation0.1、PM1、PM2.5、
PM10Particle diameter distribution (1/cm3) it is respectively 5612.35,2204,1069.59,916.99；
The sludge (embodiment 4) that quick lime and diatomite mixing ratio are 1:1, burns the PM of generation0.1、PM1、PM2.5、PM10
Particle diameter distribution (1/cm3) it is respectively 7256.16,3597.12,1235.76,1005.70.
It is by this as a result, available, it, can after the compound additive for reducing sludge incineration fine particle production quantity is added
The effective production quantity for inhibiting fine particulates.
Embodiment 5
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=0.25:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, comprising the following steps:
Step 1: preparing compound additive
By quality proportioning, quick lime and diatomite are mixed, obtain the diatomite for being mixed with quick lime；
Step 2: sludge pre-treatment
Sludge is placed in 105 DEG C of baking ovens after drying, is ground dry sludge using grinder, and crosses 60 meshes
Son is sieved, and the sludge powder that partial size is 187.5 μm~250 μm is obtained；
Step 3: compound additive and sludge mixing
The sludge powder that the diatomite for being mixed with quick lime and partial size are 187.5 μm~250 μm is sufficiently mixed, obtains being mixed with and adds
Add the sludge powder of agent；Wherein, it is 6% that the diatomite for being mixed with quick lime, which accounts for the mass percent of sludge silty amount,；
Step 4: burning
It will be mixed with the sludge powder of compound additive, is added in fluidized bed with the feed rate of 20g/min, is burned, burnt
Burning temperature is 850 DEG C, and burning atmosphere is air atmosphere, the fine particle after being burned.
Step 5: analysis
Fine particle after burning is flowed through into cyclone separator with flue gas, kinetic diameter in flue gas is filtered out and is greater than 10 μm
Particulate matter, remaining fine particle and superfine particulate matter enter the charged ram of low pressure (ELPI) with flue gas, by fine particle
It is divided into 14 grades, is respectively as follows: 6~16.7nm, 16.7~27.5nm, 27.5~56nm, 56~94.2nm, 94.2~156nm, 156
~261nm, 261~382nm, 382~613nm, 613~948nm, 948~1600nm, 1.6~2.39 μm, 2.39~3.99 μ
M, 3.99~6.68 μm, 6.68~9.91 μm, acquisition time 30min.
Embodiment 6
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=0.5:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, with embodiment 4, difference
Be in, in mass ratio, quick lime: diatomite=0.5:1.
Embodiment 7
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=0.75:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, with embodiment 4, difference
Be in, in mass ratio, quick lime: diatomite=0.75:1.
Embodiment 8
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=1:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, with embodiment 4, difference
Be in, in mass ratio, quick lime: diatomite=1:1.
According in embodiment 5, embodiment 6, embodiment 7, embodiment 8, the quality proportioning system of different quick limes and diatomite
The impact effect that standby compound additive generates fine particle to 187.5 μm~250 μm sludge incinerations is analyzed, obtained influence effect
Fruit figure is shown in Fig. 2, from Fig. 2, it can be seen that in the content range studied, with the increase of compound additive ratio, and thin
The production quantity of grain object is also to reduce, and when the ratio of compound additive is 0.75:1, the production quantity of fine particle is the smallest.
Comparative example 2
A kind of processing method of sludge, comprising the following steps:
Step 1: sludge pre-treatment
Sludge is placed in 105 DEG C of baking ovens after drying, is ground dry sludge using grinder, and crosses 60 meshes
Son is sieved, and the sludge powder that partial size is 187.5 μm~250 μm is obtained；
Step 2: burning
The sludge powder for being 187.5 μm~250 μm by partial size is added in fluidized bed with the feed rate of 20g/min, is burnt
It burns, incineration temperature is 850 DEG C, and burning atmosphere is air atmosphere, the fine particle after being burned.
Step 3: analysis
Fine particle after burning is flowed through into cyclone separator with flue gas, kinetic diameter in flue gas is filtered out and is greater than 10 μm
Particulate matter, remaining fine particle and superfine particulate matter enter the charged ram of low pressure (ELPI) with flue gas, by fine particle
Be divided into 14 grades be respectively as follows: 6~16.7nm, 16.7~27.5nm, 27.5~56nm, 56~94.2nm, 94.2~156nm, 156~
261nm, 261~382nm, 382~613nm, 613~948nm, 948~1600nm, 1.6~2.39 μm, 2.39~3.99 μm,
3.99~6.68 μm, 6.68~9.91 μm, acquisition time 30min.
The fine particle that embodiment 5, embodiment 6, embodiment 7, embodiment 8 and comparative example 2 obtain is collected and is united
Meter analysis, as a result:
It measures under experimental conditions, is not added with the sludge (comparative example 2) of additive, burns the PM of generation0.1、PM1、PM2.5、
PM10Particle diameter distribution (1/cm3) it is respectively 62712.76,32686.41,8069.61,6191.16；
The sludge (embodiment 5) that quick lime and diatomite mixing ratio are 0.25:1, burns the PM of generation0.1、PM1、PM2.5、
PM10Particle diameter distribution (1/cm3) it is respectively 1895.73,9250.21,1420.81,815.51；
The sludge (embodiment 6) that quick lime and diatomite mixing ratio are 0.5:1, burns the PM of generation0.1、PM1、PM2.5、
PM10Particle diameter distribution (1/cm3) it is respectively 8116.47,2080.42,1235.06,375.74；
The sludge (embodiment 7) that quick lime and diatomite mixing ratio are 0.75:1, burns the PM of generation0.1、PM1、PM2.5、
PM10Particle diameter distribution (1/cm3) it is respectively 5788.79,1546.98,284.94,99.64；
The sludge (embodiment 8) that quick lime and diatomite mixing ratio are 1:1, burns the PM of generation0.1、PM1、PM2.5、PM10
Particle diameter distribution (1/cm3) it is respectively 7632.59,1759.64,798.26,201.35.
By comparing to embodiment 1 and embodiment 4, discovery sludge partial size is smaller, and treatment effect is better, this be because
For, the smaller mixing of partial size is more uniform, it is contemplated that the practical application that sludge burns in a fluidized bed, if partial size is too small, rigid
It when into fluidized bed, is easy to be run by wind, if partial size is too big, wind-force is not enough to that sludge is supported to realize fluidized state.
Embodiment 9
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=0.4:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, comprising the following steps:
Step 1: preparing compound additive
By quality proportioning, quick lime and diatomite are mixed, obtain the diatomite for being mixed with quick lime；
Step 2: sludge pre-treatment
Sludge is placed in 200 DEG C of baking ovens after drying, dry sludge is ground using grinder, and is sieved, is obtained
The sludge powder for being 150 μm~200 μm to partial size；
Step 3: compound additive and sludge mixing
The diatomite for being mixed with quick lime and sludge powder are sufficiently mixed, the sludge powder for being mixed with additive is obtained；Wherein, it is mixed with
The mass percent that the diatomite of quick lime accounts for sludge silty amount is 3%；
Step 4: burning
The sludge powder for being mixed with compound additive is added in fluidized bed, is burned, incineration temperature is 750 DEG C, burns gas
Atmosphere is air atmosphere, the fine particle after being burned.
Embodiment 10
A kind of compound additive reducing sludge incineration fine particle production quantity is the mixture of quick lime and diatomite,
In mass ratio, quick lime: diatomite=0.7:1.
A kind of application method for the compound additive reducing sludge incineration fine particle production quantity, comprising the following steps:
Step 1: preparing compound additive
By quality proportioning, quick lime and diatomite are mixed, obtain the diatomite for being mixed with quick lime；
Step 2: sludge pre-treatment
Sludge is placed in 150 DEG C of baking ovens after drying, dry sludge is ground using grinder, and is sieved, is obtained
The sludge powder for being 200 μm~300 μm to partial size；
Step 3: compound additive and sludge mixing
The diatomite for being mixed with quick lime and sludge powder are sufficiently mixed, the sludge powder for being mixed with additive is obtained；Wherein, it is mixed with
The mass percent that the diatomite of quick lime accounts for sludge silty amount is 9%；
Step 4: burning
The sludge powder for being mixed with compound additive is added in fluidized bed, is burned, incineration temperature is 950 DEG C, burns gas
Atmosphere is air atmosphere, the fine particle after being burned.
Claims (6)
1. a kind of compound additive for reducing sludge incineration fine particle production quantity, which is characterized in that the reduction sludge incineration is thin
The compound additive of particulate matter production quantity is the mixture of quick lime and diatomite, in mass ratio, quick lime: diatomite=
(0.25~1): 1.
2. reducing the compound additive of sludge incineration fine particle production quantity as described in claim 1, which is characterized in that the drop
The compound additive of low sludge incineration fine particle production quantity is the mixture of quick lime and diatomite, in mass ratio, quick lime:
Diatomite=0.75:1.
3. the application method of the compound additive described in claim 1 for reducing sludge incineration fine particle production quantity, feature
It is, comprising the following steps:
Step 1: preparing compound additive
By quality proportioning, quick lime and diatomite are mixed, obtain the diatomite for being mixed with quick lime；
Step 2: sludge pre-treatment
Sludge is dried, grind, is sieved, the sludge powder that partial size is 150 μm~500 μm is obtained；
Step 3: compound additive and sludge mixing
The diatomite for being mixed with quick lime and sludge powder are sufficiently mixed, the sludge powder for being mixed with additive is obtained；Wherein, it is mixed with raw stone
The mass percent that the diatomite of ash accounts for sludge silty amount is 3%~9%；
Step 4: burning
The sludge powder for being mixed with compound additive is added in sludge incinerator, is burned, incineration temperature is 750~950 DEG C,
Burning atmosphere is air atmosphere, the fine particle after being burned.
4. the application method of the compound additive of sludge incineration fine particle production quantity is reduced as claimed in claim 3, it is special
Sign is, in the step 2, the drying, drying temperature is 105 DEG C~200 DEG C.
5. the application method of the compound additive of sludge incineration fine particle production quantity is reduced as claimed in claim 3, it is special
Sign is, in the step 4, the sludge incinerator is one of sludge incinerator, fluidized bed.
6. the application method of the compound additive of sludge incineration fine particle production quantity is reduced as claimed in claim 3, it is special
Sign is, carries out reducing sludge incineration thin using the compound additive of reduction sludge incineration fine particle production quantity of the invention
Grain object generates, analytic process are as follows:
Fine particle after burning is entered into cyclone separator with flue gas, separation diameter is greater than 10 μm of particulate matter, remaining thin
Particulate matter and superfine particulate matter enter in the charged ram of low pressure with flue gas, carry out classification receipts to the fine particle of different-diameter
Collection, then analysis statistics, is reduced the function and effect of the additive of sludge incineration fine particle generation.
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| Publication number | Priority date | Publication date | Assignee | Title |
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