CN104649650A - Novel sludge brick making technique - Google Patents
Novel sludge brick making technique Download PDFInfo
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- CN104649650A CN104649650A CN201510091655.9A CN201510091655A CN104649650A CN 104649650 A CN104649650 A CN 104649650A CN 201510091655 A CN201510091655 A CN 201510091655A CN 104649650 A CN104649650 A CN 104649650A
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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
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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, belong to building material technical field again, particularly the novel making brick from sludge technique of one.
Background technology
Municipal sludge refers to the solid waste produced in city domestic sewage, During Industrial Wastewater Treatment Process, and be the regular product of municipal sewage plant, this sludge moisture content is high, perishable, has strong stink, and dislikes because of, bacterium containing two.The toxic substance such as parasitic ovum and heavy metal.Mud is just sent to refuse landfill or is directly exposed in wilderness by most sewage work and unit in charge of construction, causes serious secondary pollution.
Along with urban wastewater discharge is increasing, the sludge quantity that sewage disposal produces also increases year by year, and sludge treatment faces problems.On the one hand, moisture percentage in sewage sludge is high, volume is large, causes difficulty to transport and landfill, and is easy to produce percolate, polluted underground water and edatope; Two is that heavy metal in mud and parasitic ovum etc. are difficult to remove and stable, no matter adopts which kind of disposal options, all very easily produces secondary pollution, hinder the recycling of mud; Three be produce in sludge incineration process a large amount of two dislike because of, HUMAN HEALTH is threatened.Therefore, the method such as landfill, burning, Land_use change that specific resistance to filtration is conventional is restricted, and how to solve recycling sludge and utilize some row problems in process, seeking suitable recycling sludge utilization ways is current field of Environment Protection problem demanding prompt solution.
General brickmaking technology be by clay through water and fire interaction, condense into brick.As follows in brick making from fly-ash technical process: feeder → rolling stirring → rotary conveyor → brick pressing machine → adobe → oxidation → finished product.After the coal gangue crushed mainly fully mixes with brick-making raw material by coal gangue baked brick technique, then stirring → ageing → stir again → rolling → shaping → cut code → drying and roasting.
All having research both at home and abroad for making brick from sludge technology, also have a lot of domestic patent application, is substantially all in mud, add the raw materials such as such as flyash, slag, cinder.As Chinese invention patent application prospectus CN102311240A discloses a kind of technique utilizing dewatered sludge brickmaking, compound is carried out mix, broken by Hubei Province, the broken method of hammer pulverizes raw material, stir, compound vibratory screening apparatus after pulverizing sieves, compound by vibratory screening apparatus is carried out upper and, roll rolling, put into orange ageing storehouse, by belt conveyor belt, the raw material after ageing is sent into forming machine and carry out blank forming, drying is carried out by cutting kiln car feeding dry kiln on code fortune code, send into roasting kiln sintering again, fired common brick is obtained after kiln discharge, perforated brick or hollow brick.And for example Chinese invention patent application prospectus CN103613403A discloses the making brick from sludge technique that can stir in a kind of making brick from sludge process.
Existing technique needs to carry out mummification to mud on the one hand, then after raw material mixing, needs again the adjustment pug moisture content that adds water, causes the waste of the energy; Two is the brick poor durability made, and the water-absorbent of brick improves and the resistance to corrosion of compactness decline impact to environment; Three is lack specific aim measure.The sludge dewatering conditioning related in making brick from sludge process, sludge odor to be controlled and problem that heavy metal such as to stablize at the aspect lacks solution targetedly.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of novel making brick from sludge technique, the mud from Sewage Plant directly being mixed with raw clay, saves the energy consumed because of sludge drying; Propose innovative approach targetedly, solve the problems such as sludge dewatering, ozone Control, heavy metal be stable; And by mud mix than optimization, add capability and performance and strength grade that the methods such as additive improve sludge brick, achieve the processing target of the minimizing of municipal sludge, innoxious, resource utilization, industrialization, sludge brick, as a kind of product, has objective economic benefit.
To achieve these goals, the technical solution used in the present invention is:
A kind of novel making brick from sludge technique, comprises the steps:
1) dehydration property conditioning is carried out to municipal sludge: add sludge dehydrating agent and mud is nursed one's health, destroy the rock steady structure of mud colloid, expand particulate interspaces, thus make it be easy to mix with other raw materials, improve dewatering simultaneously;
2) deodorizing process is carried out to municipal sludge: by adding reodorant and change in the mode of transport two kinds of approach, to transportation with utilize the sludge odor of process to control;
3) heavy metals in city sewage sludge is controlled: add stablizer to suppress heavy metal to the toxicity of microorganism, change the existence form of heavy metal, thus affect its migrate attribute, make it by stable with sludge brick after firing stage;
4) the mud pug after process and clay and additive are prepared burden;
5) send batching to strong force extruding stirrer fully to mix, then send into ageing pond, ageing 24 hours after homogenizing practiced by powerful rolling stone roller;
6) the brickmaking pug after ageing sends base workshop to, carries out pressure forming base;
7) drying shed is sent in the adobe after shaping dries;
8) tunnel furnace is put in the adobe after oven dry to sinter.
Described step 1) in, mud gel breaker is mixed by calcareous material powder and aluminium-containing substance powder and forms, and wherein, calcareous material powder is Losantin, and aluminium-containing substance powder is Tai-Ace S 150, and in total component, the mass ratio of calcium and aluminium is 9:1; The ratio accounting for dewatered sludge quality 5% ~ 10% according to mud gel breaker adds, and is to react more than 8h under the condition of 30 ~ 35 DEG C in envrionment temperature, leaves standstill 2h subsequently and mud is broken the eliminating of the product water after glue.
Described step 2) in, reodorant is mixed by the coal dust of mass percent 50 ~ 65% and the hypochlorous acid calcium powder of 35 ~ 50% and forms, and the ratio accounting for sludge quality 3 ~ 10 ‰ according to reodorant adds, and is uniformly mixed, and leaves standstill more than 3h under normal temperature.
Described step 3) in, stablizer is chelating type organic compound, and in often liter of mud, dosage is 2 ~ 5g, after mixing, reacts 15 ~ 30min at normal temperatures.
Described chelating type organic compound is Carbamates (DTC) macromolecular heavy metal chelating agent.
Described step 4) in, the mass ratio of mud pug, clay and additive is 20:56:22.
Described step 4) in, additive is flyash and the Fe of mass ratio 18:4
2o
3.
Described step 6) in, pressure is 8 ~ 10MPa.
Described step 7) in, drying shed is artificial tunnel furnace, takes successive drying, and hot blast blasts from kiln tail one end, and kiln temperature 150 DEG C ~ 200 DEG C, adobe enters from kiln end, draws off from kiln tail.
Described step 8) in, tunnel furnace is divided into preheating zone, roasting band, insulation belt and cooling zone by its length, brick embryo is 24 ~ 30h in the residence time in each district, and wherein preheating zone temperature is 200 ~ 300 DEG C, roasting band temperature is 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 invention has the beneficial effects as follows:
1. have developed novel mud gel breaker, invented excess sludge micro-mummification mixed clay technology, shortened sludge pretreatment flow process, improve mud and utilize speed, reduce production cost.
2. establish Heavy Metals in Sludge stabilization, innoxious process for treating system, solve mud stink, heavy metal pollution problem, ensure that sludge brick is producing, selling and uying the security in process.
3. propose mud and break the brickmaking pug production technique that glue-clay directly mixes, define high-quality, sludge brick making method efficient, with low cost.
4. because the organic content in municipal sludge is high, in high-temperature calcination process, pyrolyzing sludge also produces heat, and the thermal value of mud is about 14561.4kJ/kg, and the present invention fully, rationally, effectively utilizes the organic calorific value of municipal sludge, saves the energy.
Accompanying drawing explanation
Fig. 1 is present invention process schema.
Fig. 2 is tunnel kiln structure schematic diagram of the present invention.
Fig. 3 is that tunnel furnace of the present invention dries sintering schematic diagram.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.
Composition graphs 1, the present invention utilizes the technique of sewage plant sludge brickmaking, dewatered sludge sewage disposal produced is by conditioning further such as broken glue, deodorizing etc., by adding heavy metal control agent, heavy metal ion in stabilized sludge, it is made to mix with clay with under being added on strong stirring effect, be transported to ageing pond by rotary conveyor and carry out pug ageing, pug after ageing is transported to base workshop, shaping base, send into dry kiln carry out drying by cutting kiln car on code fortune code, then send into roasting kiln sintering, after kiln discharge, obtain ordinary fired brick.Sintering requires that controlling top temperature is sinter 1.5 ~ 3.0 hours under the condition of 870 ~ 920 DEG C.
Wherein mud volume is not more than 20%, moisture percentage in sewage sludge 15% ~ 20%,
Technical scheme of the present invention is further illustrated below in conjunction with specific embodiment.
Embodiment 1: a kind of making brick from sludge technique, comprises the following steps:
(1) mud transport and storage: mud is transported to making brick from sludge factory from sewage work by mud car, and be discharged into storage basin, by selecting transport at night in transportation, adding a cover the modes such as protective cloth, avoiding mud to transport urban environment and the disadvantageous effect of living and bringing of signing
(2) Sludge deodorant breaks glue: mud enters feeding system I from storage basin through sludge pump lifting, in feeding system I, add mud gel breaker, Sludge deodorant, and enter agitating reaction pond I after mixing with mud and carry out fully mixing to reach brokenly glue, deodorizing, to kill the effect of microorganism.Mud has used flocculation agent (PAC/PAM) when sewage work's dehydration is concentrated, makes mud become jelly, adds mud gel breaker and flocculation agent can be made to decompose, removing agglutinating value(of coal), destroys mud colloid, expands mud granule gap, reach and be easy to dehydration, be easy to the object of clay mixing.Mud stink derives from rancid protein, adds chloride, iron, calcium deodorant addtives in mud, and chlorion can make organic humus resolve into the harmless CO of odorless by decomposing protein
2, N
2, H
2o etc., and play sterilization, iron, calcium can absorb taste, reach the object of deodorizing, realize eliminating sludge odor.
(3) mud enters agitating reaction pond II complete brokenly glue, deodorizing in reaction tank I after, sludge heavy-metal stablizer is added by feeding system, the existence form of Heavy Metals in Sludge ion is changed by the complexing action of chelate compound, thus affect its migrate attribute, make it after high-temperature roasting, stable with sludge brick.
(4) prepare burden: additive flyash and Fe
2o
3after crushing and screening, mixed by machine,massing by than arranging with the clay sieved, pretreated mud.Wherein mud volume is 20%, flyash and Fe
2o
3volume is respectively 18% and 4% (above average massfraction), regulates mixing pug moisture content to be 12 ~ 32.
(5) by rotary conveyor, pug is sent into the ageing of ageing pond 24 hours.
(6) pug after ageing, by the specification requirement molding of national GB5101-2003 " fired common brick ", by extrusion forming, obtains adobe.
(7) by cutting code fortune code, dry kiln oven dry is delivered in adobe.Dry employing artificial tunnel kiln successive drying.As shown in Figure 2, tunnel furnace is a long tunnel to tunnel furnace kiln, and there is fixing kiln wall both sides, have kiln top above, and the kiln car along the movement of kiln inner orbit is formed at the bottom of kiln, kiln car has adobe to be dried.In figure, adjust air lock 1 to be used for adjusting the flow passing into hot blast, thus kiln temperature is adjusted, thermometer hole 2 is used for detecting the real time temperature in kiln, and moisture discharging opening 3, for discharging steam, ensures kiln inner drying, end air outlet 4 is for sending into dry wind, and spy hole 5 can for real-time condition in personal observations's kiln.Hot blast blasts from kiln tail one end, kiln temperature about 150 DEG C ~ 200 DEG C.Adobe enters from kiln end, draws off from kiln tail.Roasting tunnel kiln can be sent into through the adobe of kiln drying to fire.
(8) dry brick enters roasting tunnel kiln with kiln car and carries out roasting, and roasting tunnel kiln as shown in Figure 3, is provided with fixing roasting band at the middle part of kiln, and roasting band temperature is between 870 DEG C ~ 920 DEG C.In tunnel furnace, heat smoke and kiln car relative movement, enter freezing air 8 by the exit end of kiln car, cools the brick burnt till; By the burning for roasting band of the air that heats; The flue gas flow that burning produces is through preheating zone preheating adobe, and then set in kiln hood both walls exhaust smoke hole flows through flue and enters air through chimney, and in figure, 5 represent and discharge flue gases, and 6 represent and add fuel, and 7 represent kiln car working direction.Whole tunnel furnace is divided into preheating zone 9, roasting band 10 and insulation and cooling zone 11 by its length.In roasting sludge brick process, pathogenic bacteria can all be killed, and heavy metal (As, Cd, Cr, Cu, Pb etc.), by consolidation, realizes innoxious.
(9) through the temperature calcination of 870 ~ 920 DEG C after 1.5 ~ 3 hours, the fired common brick of system.The mass property of gained vitrified brick meets the specification of quality to fired common brick in GB5101-2003 " fired common brick ", and its intensity meets the standard of MU15 series in fired common brick strength grade (GB5101-2003) substantially.
Claims (10)
1. a novel making brick from sludge technique, is characterized in that, comprise the steps:
1) dehydration property conditioning is carried out to municipal sludge: add sludge dehydrating agent and mud is nursed one's health, destroy the rock steady structure of mud colloid, expand particulate interspaces, thus make it be easy to mix with other raw materials, improve dewatering simultaneously;
2) deodorizing process is carried out to municipal sludge: by adding reodorant and change in the mode of transport two kinds of approach, to transportation with utilize the sludge odor of process to control;
3) heavy metals in city sewage sludge is controlled: add stablizer to suppress heavy metal to the toxicity of microorganism, change the existence form of heavy metal, thus affect its migrate attribute, make it by stable with sludge brick after firing stage;
4) the mud pug after process and clay and additive are prepared burden;
5) send batching to strong force extruding stirrer fully to mix, then send into ageing pond, ageing 24 hours after homogenizing practiced by powerful rolling stone roller;
6) the brickmaking pug after ageing sends base workshop to, carries out pressure forming base;
7) drying shed is sent in the adobe after shaping dries;
8) tunnel furnace is put in the adobe after oven dry to sinter.
2. novel making brick from sludge technique according to claim 1, it is characterized in that, described step 1) in, mud gel breaker is mixed by calcareous material powder and aluminium-containing substance powder and forms, wherein, calcareous material powder is Losantin, and aluminium-containing substance powder is Tai-Ace S 150, in total component, the mass ratio of calcium and aluminium is 9:1; The ratio accounting for dewatered sludge quality 5% ~ 10% according to mud gel breaker adds, and is to react more than 8h under the condition of 30 ~ 35 DEG C in envrionment temperature, leaves standstill 2h subsequently and mud is broken the eliminating of the product water after glue.
3. novel making brick from sludge technique according to claim 1, it is characterized in that, described step 2) in, reodorant is mixed by the coal dust of mass percent 50 ~ 65% and the hypochlorous acid calcium powder of 35 ~ 50% and forms, the ratio accounting for sludge quality 3 ~ 10 ‰ according to reodorant adds, be uniformly mixed, under normal temperature, leave standstill more than 3h.
4. novel making brick from sludge technique according to claim 1, is characterized in that, described step 3) in, stablizer is chelating type organic compound, and in often liter of mud, dosage is 2 ~ 5g, after mixing, reacts 15 ~ 30min at normal temperatures.
5. novel making brick from sludge technique according to claim 4, it is characterized in that, described chelating type organic compound is Carbamates (DTC) macromolecular heavy metal chelating agent.
6. novel making brick from sludge technique according to claim 1, is characterized in that, described step 4) in, the mass ratio of mud pug, clay and additive is 20:56:22.
7. novel making brick from sludge technique according to claim 1 or 6, is characterized in that, described step 4) in, additive is flyash and the Fe of mass ratio 18:4
2o
3.
8. novel making brick from sludge technique according to claim 1, is characterized in that, described step 6) in, pressure is 8 ~ 10MPa.
9. novel making brick from sludge technique according to claim 1, is characterized in that, described step 7) in, drying shed is artificial tunnel furnace, takes successive drying, and hot blast blasts from kiln tail one end, kiln temperature 150 DEG C ~ 200 DEG C, adobe enters from kiln end, draws off from kiln tail.
10. novel making brick from sludge technique according to claim 1, it is characterized in that, described step 8) in, tunnel furnace is divided into preheating zone, roasting band, insulation belt and cooling zone by its length, brick embryo is 24 ~ 30h in the residence time in each district, and wherein preheating zone temperature is 200 ~ 300 DEG C, roasting band temperature is 900 ~ 1000 DEG C, insulation belt temperature is 350 ~ 400 DEG C, cooling zone temperature is 20 ~ 200 DEG C.
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| CN105967752A (en) * | 2016-05-09 | 2016-09-28 | 武汉理工大学 | Preparation method of sheet materials with low pollution by using city sludge and calcium carbide slags |
| CN106467391A (en) * | 2015-12-09 | 2017-03-01 | 任旭东 | The Treatment of Sludge that cold-rolling steel strip pickling waste water produces is converted into construction material technique |
| CN106699112A (en) * | 2016-12-06 | 2017-05-24 | 广州市科恩电脑有限公司 | Method for manufacturing bricks by utilizing building waste |
| CN106747293A (en) * | 2017-01-06 | 2017-05-31 | 柳州市正龙机械制造有限公司 | The wet mud brick-making method for directly being produced using urban wastewater treatment firm |
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| CN107459238A (en) * | 2017-09-22 | 2017-12-12 | 南京律智诚专利技术开发有限公司 | A kind of technique for manufacturing bottom of pond prefabricated board with sludge |
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| CN106467391A (en) * | 2015-12-09 | 2017-03-01 | 任旭东 | The Treatment of Sludge that cold-rolling steel strip pickling waste water produces is converted into construction material technique |
| CN105967752B (en) * | 2016-05-09 | 2018-11-30 | 武汉理工大学 | Utilize the method for municipal sludge and carbide slag preparation low pollution plate |
| CN105967752A (en) * | 2016-05-09 | 2016-09-28 | 武汉理工大学 | Preparation method of sheet materials with low pollution by using city sludge and calcium carbide slags |
| CN106699112A (en) * | 2016-12-06 | 2017-05-24 | 广州市科恩电脑有限公司 | Method for manufacturing bricks by utilizing building waste |
| CN106747305A (en) * | 2016-12-06 | 2017-05-31 | 广州市科恩电脑有限公司 | A kind of construction waste recoverying and utilizing method |
| CN107032756A (en) * | 2016-12-06 | 2017-08-11 | 广州市科恩电脑有限公司 | The technique that a kind of use building waste prepares fired brick |
| CN106747293A (en) * | 2017-01-06 | 2017-05-31 | 柳州市正龙机械制造有限公司 | The wet mud brick-making method for directly being produced using urban wastewater treatment firm |
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| CN107555953A (en) * | 2017-09-22 | 2018-01-09 | 南京律智诚专利技术开发有限公司 | A kind of technique with sludge manufacturing process brick |
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