CN104649650B - Sludge brick making technique - Google Patents
Sludge brick making technique Download PDFInfo
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- CN104649650B CN104649650B CN201510091655.9A CN201510091655A CN104649650B CN 104649650 B CN104649650 B CN 104649650B CN 201510091655 A CN201510091655 A CN 201510091655A CN 104649650 B CN104649650 B CN 104649650B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention discloses a novel sludge brick making technique which comprises the following steps that municipal sludge is subjected to dewatering conditioning and desodoration treatment; heavy metal is controlled; treated sludge pug, clay and an additive are blended to form a material; the material is fed into a brute force extrusion mixer to be mixed fully, and is ground and homogenized by brute force roll grinding and aged; the aged brick making pug is fed into an adobe making workshop to be subjected to compression moulding for adobe making; the moulded adobes are fed into a drying room to be dried; and the dried adobes are placed in a back stage of a tunnel kiln to be sintered. According to the technique, the sludge from a sewage plant is mixed with the raw clay directly, so that energy resources consumed due to sludge drying are saved; targeted improvement measures are put forwards to solve the problems of sludge dewatering, odor control, heavy metal stabilization, etc.; the quality performance and the strength grade of sludge bricks are improved by methods of optimizing a sludge blending ratio and feeding the additive, etc.; the reduction, harmlessness, reclamation and industrialization treatment goals on the municipal sludge are realized; and the sludge bricks, serving as a product, have objective economic benefits.
Description
Technical field
The invention belongs to municipal sludge harmless treatment and application technology as the second resource field, building material technology neck is belonged to again
Domain, more particularly to a kind of new making brick from sludge technique.
Background technology
Municipal sludge refers to the solid waste of generation in city domestic sewage, During Industrial Wastewater Treatment Process, is dirty city
The regular product of water treatment plant, this sludge moisture content is high, perishable, there is a strong stink, and containing two dislike because, carefully
Bacterium.The noxious material such as parasitic ovum and heavy metal.Most sewage treatment plants and unit in charge of construction are that sludge is sent into garbage loading embeading
Field is directly exposed in wilderness, causes serious secondary pollution.
As urban wastewater discharge is increasing, the sludge quantity that sewage disposal is produced also increases year by year, Treatment of Sludge face
Face problems.On the one hand, moisture percentage in sewage sludge is high, volume is big, and difficulty is caused to transport and landfill, and is easy to produce percolate,
Polluted underground water and soil environment；Two is that heavy metal and parasitic ovum in sludge etc. are difficult to remove and stablize, no matter using which
Disposal options are planted, secondary pollution is all easily produced, the recycling of sludge is hindered；Three be produce during sludge incineration it is a large amount of
Two dislike because being threatened to health.Therefore, the method such as specific resistance to filtration conventional landfill, burning, Land_use change is subject to
How limitation, solve the problems, such as some row during recycling sludge utilization, and seeking suitable recycling sludge utilization ways is
Current field of Environment Protection problem demanding prompt solution.
General brickmaking technology is, by water and the reciprocation of fire, to condense into brick by clay.Such as brick making from fly-ash technique
Flow is as follows：Feeder → rolling stirring → belt conveyor → brick machine → adobe → oxidation → finished product.Coal gangue baked brick
Technique is mainly after the gangue that will crush is sufficiently mixed with brick-making raw material, then stir → be aged → be stirred for → rolling →
It is molded → cuts code → drying and roasting.
There is research both at home and abroad for making brick from sludge technology, also there are many country's patent applications, be substantially in sludge
The raw materials such as addition flyash, slag, cinder.As Chinese invention patent application prospectus CN102311240A is disclosed
A kind of technique of utilization dewatered sludge brickmaking, mix is carried out by compound, and by the way that Hubei Province is broken, the broken method of hammer pulverizes raw material, stirring is equal
Even, compound after pulverizing is sieved with vibratory sieve, will be carried out by the compound of vibratory sieve and, rolled to rolling, be put into orange old
Change storehouse, transport band by belt carries out blank forming by the raw material feeding forming machine after ageing, is sent by cutting kiln car on code fortune code
Enter dry kiln to be dried, be re-fed into calcining kiln sintering, fired common brick, porous brick or hollow brick are obtained after kiln discharge.In and for example
State invention patent application prospectus CN103613403A can be stirred during disclosing a kind of making brick from sludge
Making brick from sludge technique.
On the one hand existing process needs to carry out desiccation to sludge, and the adjustment pug that need to then be added water again after raw material mixing is aqueous
Rate, causes the waste of the energy；The two brick poor durabilities being formed into, the water imbibition of brick is improved and compactness declines influence to environment
Resistance to corrosion；Three are a lack of specific aim measure.To be related to during making brick from sludge sludge dewatering conditioning, sludge odor control and
The solution of the problem lack of targeted of aspect such as heavy metal stabilization.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of new making brick from sludge technique,
Sludge from Sewage Plant is directly mixed with raw clay, the energy that saving is consumed by sludge drying；Propose targetedly
The problems such as corrective measure, solution sludge dewatering, ozone Control, heavy metal stabilization；And by sludge mix than optimization, add addition
The methods such as agent improve the capability and performance and strength grade of sludge brick, realize the minimizing of municipal sludge, innoxious, resource,
The treatment target of industrialization, sludge brick as a kind of product, with objective economic benefit.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of new making brick from sludge technique, comprises the following steps：
1) dehydration property conditioning is carried out to municipal sludge：Add sludge dehydrating agent to nurse one's health sludge, destroy sludge colloid
Rock-steady structure, expand particulate interspaces, so as to make it easier to mix with other raw materials, at the same raising dewatering；
2) deodorizing process are carried out to municipal sludge：By adding two kinds of approach of deodorant and change in the mode of transport, to transport
Process and it is controlled using the sludge odor of process；
3) heavy metals in city sewage sludge is controlled：Addition stabilizer is changed with suppressing toxicity of the heavy metal to microorganism
Become the existence form of heavy metal, so as to influence its migration characteristic, be passed to after firing stage in stabilization and sludge brick；
4) the sludge pug after treatment and clay and additive are carried out into dispensing；
5) dispensing feeding strong force extruding stirrer is sufficiently mixed, then aging tank is sent into after strength rolling stone roller white silk homogenizing,
Ageing 24 hours；
6) the brickmaking pug after being aged is sent into base workshop, carries out pressure forming base；
7) the adobe feeding drying chamber drying after being molded；
8) adobe after drying is put into tunnel cave to be sintered.
The step 1) in, sludge gel breaker is made up of calcareous material powder and the mixing of aluminium-containing substance powder, wherein, calcic
Material powder is calcium hypochlorite, and aluminium-containing substance powder is aluminum sulfate, and in total component, calcium is 9 with the mass ratio of aluminium:1；According to dirt
The ratio that mud gel breaker accounts for dewatered sludge quality 5%~10% is added, and is reacted under conditions of being 30~35 DEG C in environment temperature
More than 8h, then stands 2h product water by sludge after breaking gel and excludes.
The step 2) in, deodorant is mixed by the coal dust of mass percent 50~65% and 35~50% hypochlorous acid calcium powder
Be combined into, the ratio for accounting for sludge quality 3~10 ‰ according to deodorant is added, and is uniformly mixed, under normal temperature stand 3h with
On.
The step 3) in, stabilizer is chelating type organic compound, and dosage is 2~5g in every liter of sludge, and mixing is equal
After even, 15~30min is reacted at normal temperatures.
The chelating type organic compound is Carbamates (DTC) macromolecular heavy metal chelating agent.
The step 4) in, the mass ratio of sludge pug, clay and additive is 20：56：22.
The step 4) in, additive is mass ratio 18:4 flyash and Fe2O3。
The step 6) in, pressure is 8~10MPa.
The step 7) in, drying chamber is artificial tunnel cave, takes continuous drying, and hot blast is blasted from kiln tail one end, in kiln
150 DEG C~200 DEG C of temperature, adobe enters from kiln end, is drawn off from kiln tail.
The step 8) in, tunnel cave is divided into preheating zone, roasting band, insulation belt and cooling zone by its length, and adobe is every
The residence time in individual area is 24~30h, wherein preheating zone temperature be 200~300 DEG C, roasting band temperature be 900~1000 DEG C,
Insulation belt temperature is 350~400 DEG C, cooling zone temperature is
20~200 DEG C.
Compared with prior art, the beneficial effects of the invention are as follows：
1. new sludge gel breaker is have developed, the micro- desiccation mixed clay technology of excess sludge has been invented, sludge is shortened pre-
Handling process, improves sludge and utilizes speed, reduces production cost.
2. establish Heavy Metals in Sludge stabilize, innoxious process for treating system, solve sludge stink, heavy metal-polluted
Dye problem, it is ensured that security of the sludge brick during producing, selling and uying.
3. the brickmaking pug production technology that the broken glue-clay of sludge directly mixes is proposed, high-quality, efficient, cost is formd
Cheap sludge brick preparation method.
4. because the content of organics in municipal sludge is high, in high-temperature calcination process, pyrolyzing sludge simultaneously produces heat, dirty
The caloric value of mud is about 14561.4kJ/kg, and the present invention fully, rationally, effectively utilizes the calorific value of municipal sludge organic matter, section
Save the energy.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Fig. 2 is tunnel kiln structure schematic diagram of the present invention.
Fig. 3 is tunnel kiln drying sintering schematic diagram of the present invention.
Specific embodiment
Describe embodiments of the present invention in detail with reference to the accompanying drawings and examples.
With reference to Fig. 1, the dewatered sludge of sewage disposal generation is passed through broken by the present invention using the technique of sewage plant sludge brickmaking
Glue, deodorant etc. are further nursed one's health, by adding heavy metal controlling agent, the heavy metal ion in stabilized sludge, make it with clay and
Addition is well mixed under strong stirring effect, and being transported to aging tank by belt conveyor carries out pug ageing, the mud after ageing
Material is transported to base workshop, is molded base, is dried by cutting kiln car feeding dry kiln on code fortune code, is re-fed into being calcined klining
Knot, ordinary fired brick is obtained after kiln discharge.Sintering requires control maximum temperature to sinter 1.5 under conditions of 870~920 DEG C~
3.0 hours.
Wherein sludge volume is not more than 20%, moisture percentage in sewage sludge 15%~20%,
Technical scheme is further illustrated with reference to specific embodiment.
Embodiment 1：A kind of making brick from sludge technique, comprises the following steps：
(1) sludge transport and storage：Sludge is transported to making brick from sludge factory from sewage treatment plant by sludge car, and is discharged into storage mud
Pond, is transported in transportation by selecting night, adds a cover the modes such as protective cloth, it is to avoid sludge transport is to urban environment and signs life
The adverse effect that work brings
(2) the broken glue of Sludge deodorant：Sludge is lifted into feeding system I from storage basin through sludge pump, in feeding system I
Add sludge gel breaker, Sludge deodorant, and be sufficiently mixed to reach brokenly into agitating reaction pond I after mixing with sludge
Glue, effect that is deodorant, killing microorganism.Sludge has used flocculant (PAC/PAM) when sewage treatment plant is dehydrated and concentrates, and makes sludge
As jelly, add sludge gel breaker to decompose flocculant, remove cohesiveness, destroy sludge colloid, expand sludge
Intergranular gap, reaches and is easy to dehydration, it is easy to the purpose that clay is mixed.Sludge stink derives from rancid protein, is thrown in sludge
Plus the deodorant addtives of chloride, iron, calcium, it is harmless that chlorion can make organic humus resolve into odorless with decomposing protein
CO2、N2、H2O etc., and play sterilization, iron, calcium can absorb taste, reach deodorant purpose, realize eliminating sludge odor.
(3) sludge completes broken glue, deodorant entrance agitating reaction pond II afterwards in reaction tank I, and dirt is added by feeding system
Mud heavy metal stabilizer, changes the existence form of Heavy Metals in Sludge ion, so that shadow by the complexing of chelate compound
Its migration characteristic is rung, makes it after high-temperature roasting, in stabilization and sludge brick.
(4) dispensing：Additive flyash and Fe2O3After after crushing and screening, with the clay for having sieved, pretreated sludge
Mixed by machine,massing by than arranging.Wherein sludge volume is 20%, flyash and Fe2O3Volume is respectively 18% He
4% (above average mass fraction), regulation mixing pug moisture content is 12~32.
(5) pug is sent into aging tank by belt conveyer to be aged 24 hours.
(6) pug after being aged presses country GB5101-2003《Fired common brick》Specification requirement molding, by pressurizeing into
Type, is obtained adobe.
(7) code is transported by cutting code to deliver to adobe and dry kiln drying.Dry continuous drying using artificial tunnel's kiln.Tunnel cave
As shown in Figure 2, tunnel cave is a tunnel long to hothouse, and there is fixed kiln wall both sides, there is kiln top above, along rail in kiln
The kiln car of road movement constitutes kiln bottom, and dry adobe is needed on kiln car.In figure, air lock 1 is adjusted to be used for adjusting the flow for being passed through hot blast,
So as to be adjusted to kiln temperature, thermometer hole 2 is used for detecting the real time temperature in kiln that moisture discharging opening 3 is used to discharge steam, it is ensured that
Dried in kiln, bottom air outlet 4 is used to send into dry wind, and peephole 5 is available for real-time condition in personal observations' kiln.Hot blast is from kiln tail one
Terminal drum enters, about 150 DEG C~200 DEG C of kiln temperature.Adobe enters from kiln end, is drawn off from kiln tail.By the dry adobe of hothouse
Can feeding roasting tunnel kiln firing.
(8) dry brick is calcined with kiln car into roasting tunnel kiln, roasting tunnel kiln as shown in Figure 3, in kiln
Middle part is provided with fixed roasting band, and roasting band temperature is between 870 DEG C~920 DEG C.Heat smoke is relative with kiln car in tunnel cave moves
It is dynamic, cold air 8, the brick that cooling is burnt till are entered by the port of export of kiln car；Heated air is used to be calcined the burning of band；Burning is produced
Raw flue gas flows through preheating zone preheating adobe, and then exhaust smoke hole set from kiln hood both walls flows through flue and entered through chimney
Air, 5 represent discharge flue gas in figure, and 6 represent addition fuel, and 7 represent kiln car directions of advance.Whole tunnel cave is divided into by its length
Preheating zone 9, roasting band 10 and insulation and cooling zone 11.During roasting sludge brick, pathogen can all be killed, heavy metal (As,
Cd, Cr, Cu, Pb etc.) it is consolidated, realize innoxious.
(9) after 870~920 DEG C of temperature calcination 1.5~3 hours, the fired common brick of system.The quality of gained fired brick
Characteristic meets GB5101-2003《Fired common brick》In to the quality requirement of fired common brick, it is general that its intensity substantially meets sintering
The standard of MU15 series in logical brick strength grade (GB5101-2003).
Claims (6)
1. a kind of making brick from sludge technique, it is characterised in that comprise the following steps：
1) dehydration property conditioning is carried out to municipal sludge：Add sludge dehydrating agent to nurse one's health sludge, destroy the steady of sludge colloid
Fixed structure, expands particulate interspaces, so as to make it easier to mix with other raw materials, while improving dewatering；
2) deodorizing process are carried out to municipal sludge：By adding two kinds of approach of deodorant and change in the mode of transport, to transportation
It is controlled with the sludge odor using process；
3) heavy metals in city sewage sludge is controlled：Addition stabilizer changes weight to suppress toxicity of the heavy metal to microorganism
The existence form of metal, so as to influence its migration characteristic, is passed to after firing stage in stabilization and sludge brick；
4) the sludge pug after treatment and clay and additive are carried out into dispensing；
5) dispensing feeding strong force extruding stirrer is sufficiently mixed, then aging tank is sent into after strength rolling stone roller white silk homogenizing, be aged
24 hours；
6) the brickmaking pug after being aged is sent into base workshop, carries out pressure forming base；
7) the adobe feeding drying chamber drying after being molded；
8) adobe after drying is put into tunnel cave to be sintered；
The step 1) in, sludge gel breaker is made up of calcareous material powder and the mixing of aluminium-containing substance powder, wherein, calcareous material
Powder is calcium hypochlorite, and aluminium-containing substance powder is aluminum sulfate, and in total component, calcium is 9 with the mass ratio of aluminium:1；It is broken according to sludge
The ratio that jelly accounts for dewatered sludge quality 5%~10% is added, environment temperature be 30~35 DEG C under conditions of react 8h with
On, then stand 2h product water by sludge after breaking gel and exclude；
The step 2) in, deodorant by mass percent 50~65% coal dust and 35~50% hypochlorous acid calcium powder mixing group
Into the ratio for accounting for sludge quality 3~10 ‰ according to deodorant is added, and is uniformly mixed, and more than 3h is stood under normal temperature；
The step 3) in, stabilizer is chelating type organic compound, and dosage is 2~5g in every liter of sludge, after being well mixed,
15~30min is reacted at normal temperatures；
The step 4) in, the mass ratio of sludge pug, clay and additive is 20：56：22.
2. making brick from sludge technique according to claim 1, it is characterised in that the chelating type organic compound is carbamic acid
Salt (DTC) macromolecular heavy metal chelating agent.
3. making brick from sludge technique according to claim 1, it is characterised in that the step 4) in, additive is mass ratio 18:
4 flyash and Fe2O3。
4. making brick from sludge technique according to claim 1, it is characterised in that the step 6) in, pressure is 8~
10MPa。
5. making brick from sludge technique according to claim 1, it is characterised in that the step 7) in, drying chamber is artificial tunnel
Kiln, takes continuous drying, and hot blast is blasted from kiln tail one end, 150 DEG C~200 DEG C of kiln temperature, and adobe enters from kiln end, from kiln tail
Draw off.
6. making brick from sludge technique according to claim 1, it is characterised in that the step 8) in, tunnel cave is by its length point
It is preheating zone, roasting band, insulation belt and cooling zone, residence time of the adobe in each area is 24~30h, wherein preheating zone temperature
Spend for 200~300 DEG C, roasting band temperature be 900~1000 DEG C, insulation belt temperature be 350~400 DEG C, cooling zone temperature be 20
~200 DEG C.
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| CN101830689B (en) * | 2010-05-10 | 2012-08-15 | 广州绿由工业弃置废物回收处理有限公司 | Sintered light-weight environment-friendly brick produced from printing and dyeing sludge and manufacture method thereof |
| CN102583824A (en) * | 2012-02-17 | 2012-07-18 | 江苏艾特克环境工程设计研究院有限公司 | Method for treating mining machine-made sand waste water |
| CN103864397A (en) * | 2014-01-15 | 2014-06-18 | 华侨大学 | Method for making brick by using recycled deeply dewatered sludge |
| CN104098243A (en) * | 2014-08-07 | 2014-10-15 | 四川金海环保工程股份有限公司 | Harmless treatment machine for sludge |
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