CN205461776U - System for cement kiln is dealt with wet mud in coordination and is fallen low nitrogen oxide and discharge - Google Patents
System for cement kiln is dealt with wet mud in coordination and is fallen low nitrogen oxide and discharge Download PDFInfo
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- CN205461776U CN205461776U CN201521140039.XU CN201521140039U CN205461776U CN 205461776 U CN205461776 U CN 205461776U CN 201521140039 U CN201521140039 U CN 201521140039U CN 205461776 U CN205461776 U CN 205461776U
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- wet mud
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Abstract
The utility model discloses a system for cement kiln is dealt with wet mud in coordination and is fallen low nitrogen oxide and discharge, including ground following formula sludge warehouse, the bottom is through the broken cascade frame and the screw feeding mouth intercommunication of unloading in the ground following formula sludge warehouse, and the discharge gate and the feed inlet of malleation batcher of discharge auger are connected, and the discharge gate of malleation batcher passes through the pipeline to be connected with the feed inlet of solid pump, and solid pump discharge gate forces down to rub through the height and hinders composite pipe and be connected with the spray gun feed inlet, and the spout of spray gun lets in in the cement dore furnace. The utility model discloses can effectively reduce nitrogen oxide emission in the cement kiln.
Description
Technical field
This utility model relates to cement kiln emission-reducing system field, and the wet mud of a kind of cement kiln synergic processing also reduces the system of discharged nitrous oxides.
Background technology
The municipal sludge that current domestic sewage treatment plant is typically all producing carries out mechanical dehydration, and the mud after dehydration is directly transported outward, and the minimizing namely having carried out mud processes.But the process of this minimizing of mechanical sludge dewatering, it is impossible to allow mud reach stabilisation and innoxious, more can not meet the requirement of resource.Recent years, along with the high-volume of sewage treatment plant is gone into operation, produced mud becomes a big pollution problem.
Containing moisture, organic component and inorganic constituents in mud.Containing substantial amounts of protein, fat, mineral oil, detergent, humus, antibacterial and the metabolites at different levels (various nitrogenous, the Organic substances of sulfur-bearing and the Organic substance of some low-molecular-weights) of antibacterial in the organic principle of mud, wherein also contains parasite or ovum, microorganism.The inorganic constituents of mud is mainly oxide and some trace heavy metal elements of silicon, aluminum, ferrum, calcium, phosphorus, magnesium etc..
Countries in the world are all according to respective situation, and treatment in accordance with local conditions ground selects sludge treatment system.The U.S. is vast in territory, land resource relative abundance, so the ratio that the U.S. uses Sludge landfill is high；Japan, due to shortage of land resource, uses the ratio burned high；Additionally every country is also adopted by different disposal systems in the different phase of economic development.
The mineral composition of sludge burning ash residue is similar with cement composition, and sludge building material utilizes and can process disposing sludge preferred option as China.
Along with national economy sustained and rapid development and total energy consumption are unprecedented soaring, China's nitrogen oxides (NOX) discharge capacity increases rapidly, if not taking further control measure, to the year two thousand twenty, nitrogen oxides DS NOx Est total amount becomes, by exceeding the U.S., the country that nitrogen oxide emission ranks first in the world.
At present, China has nearly 5000 of cement production enterprise, occupies first place in the world in yield position the most for years.NOX occupies important proportion in cement kiln tail gas pollutes.The discharge of China's cement industry nitrogen oxides accounts for about the 10% of total release.Cement production enterprise has become as the third-largest DS NOx Est rich and influential family after thermal power generation, vehicle exhaust.
The hazardness of nitrogen oxides shows: nitrogen oxides mainly balances with nitric oxide and nitrogen dioxide in an atmosphere and coexists.Nitrogen oxides can cause various respiratory tract disease, is the major pollutants forming photochemical fog, is also one of main acidic materials forming acid rain.Sulfur dioxide and nitrogen oxides can also form the fine particle of inorganic salt, add the fine particle in heavy air and pollute.
The reduction of discharging problem of nitrogen oxides has become as restriction China's environment and the significant problem of economic development.Cement plant the most all uses SNCR denitration system at present, needs to use ammonia, carbamide etc. as denitrification reducing agent, therefore adds the operating cost of enterprise.Utilize cement kiln synergic processing mud can reduce nitrogen oxides, decrease the consumption of reducing agent ammonia or carbamide, both saved operating cost for enterprise, the subsidy of sludge treatment can be obtained simultaneously.
Therefore, utilize cement kiln synergic processing mud, be the system of a kind of discharged nitrous oxides reduced again while utilizing best-of-breed technology disposing sludge in cement kiln flue gas, be a kind of technology path killed two birds with one stone.
Utility model content
The purpose of this utility model is to provide the wet mud of a kind of cement kiln synergic processing and reduces the system of discharged nitrous oxides, the problem big to solve prior art discharge of nitrogen oxide in cement kiln amount.
In order to achieve the above object, the technical scheme that this utility model is used is:
nullThe wet mud of a kind of cement kiln synergic processing also reduces the system of discharged nitrous oxides，Including the underground type sludge bin being arranged on below ground，It is characterized in that: below underground type sludge bin, be sequentially provided with discharge auger、Malleation batcher、Solid pump，Described underground type sludge bin inner bottom part is connected with discharge auger charging aperture by broken arch balladeur train，The discharging opening of discharge auger is connected with the charging aperture of malleation batcher by pipeline，And on pipeline, slide valve is installed between discharge auger and malleation batcher，The discharging opening of malleation batcher is connected with the charging aperture of solid pump by pipeline，It is additionally provided with spray gun outside the ground at underground type sludge bin place、Cement decomposing furnace，Described solid pump discharging opening forces down frictional resistance compound pipeline complex pipeline by height and is connected with spray gun feed mouth，And height forces down and is provided with trash separator on frictional resistance compound pipeline complex pipeline，The spout of spray gun is passed through in cement decomposing furnace.
The described wet mud of a kind of cement kiln synergic processing also reduces the system of discharged nitrous oxides, it is characterized in that: described underground type sludge bin is rectangle structure, surface carbon steel preservative treatment, underground type sludge bin is placed on underground and is easy to mud transport vehicle and topples over mud, the Cang Ding of underground type sludge bin is provided with charge level detector, can automatically detect, reports to the police and show in real time material position.
The described wet mud of a kind of cement kiln synergic processing also reduces the system of discharged nitrous oxides, it is characterised in that: described discharge auger uses single shaft discharge auger.
The described wet mud of a kind of cement kiln synergic processing also reduces the system of discharged nitrous oxides, it is characterised in that: described malleation batcher uses double-shaft spiral batcher.
The described wet mud of a kind of cement kiln synergic processing also reduces the system of discharged nitrous oxides, it is characterised in that: described height forces down frictional resistance compound pipeline complex pipeline and uses seamless steel pipe to be base material, and seamless steel pipe interior surface is combined low friction resistance material.
The described wet mud of a kind of cement kiln synergic processing also reduces the system of discharged nitrous oxides, it is characterised in that: described solid pump is a kind of displacement pump.
The described wet mud of a kind of cement kiln synergic processing also reduces the system of discharged nitrous oxides, it is characterised in that: the mud that described spray gun utilizes compressed air solid pump to be brought fully is broken up and is sprayed in cement decomposing furnace.
The beneficial effects of the utility model are:
1, providing the system schema of wet mud (moisture content about the 80%) Direct Disposal of a kind of high-moisture percentage, this technology is a kind of innoxious, minimizing, resource, the optimal sludge treating method of low cost.
2, utilize the reproducibility compositions such as the Ammonia in mud (NHi), cyanogen (HCN), hydrocarbon root (CHi) and nitrogen oxides (NOX) to react and generate nitrogen (N2), the nitrogen oxides (NOX) of part is reduced into nitrogen (N2), reduces nitrogen oxides in cement kiln flue gas (NOX) discharge.Decrease reducing agent ammonia used by SNCR denitration or the amount of carbamide, both saved operating cost for enterprise, the subsidy of sludge treatment can be obtained simultaneously.
3, this utility model system novelty is unique, simple and practical, process is continuous, automatic, safe and reliable.
Accompanying drawing explanation
Fig. 1 is this utility model system construction drawing.
Detailed description of the invention
nullShown in Figure 1，The wet mud of a kind of cement kiln synergic processing also reduces the system of discharged nitrous oxides，Including the underground type sludge bin 1 being arranged on below ground，Discharge auger 3 it is sequentially provided with below underground type sludge bin 1、Malleation batcher 5、Solid pump 6，Underground type sludge bin 1 inner bottom part is connected with discharge auger 3 charging aperture by broken arch balladeur train 2，The discharging opening of discharge auger 3 is connected with the charging aperture of malleation batcher 5 by pipeline，And slide valve 4 is installed on pipeline between discharge auger 3 and malleation batcher 5，The discharging opening of malleation batcher 5 is connected with the charging aperture of solid pump 6 by pipeline，It is additionally provided with spray gun 9 outside the ground at underground type sludge bin 1 place、Cement decomposing furnace 10，Solid pump 6 discharging opening forces down frictional resistance compound pipeline complex pipeline 8 by height and is connected with spray gun 9 charging aperture，And height forces down and is provided with trash separator 7 on frictional resistance compound pipeline complex pipeline 8，The spout of spray gun 9 is passed through in cement decomposing furnace 10.
Utility model works process is as follows:
(1) municipal sludge that sewage treatment plant produces is transported in factory by mud transport vehicle, pour in underground type sludge bin；
(2) by bottom, storehouse broken arch balladeur train, mud is sent in discharge auger；
(3) mud is sent into malleation batcher by discharge auger.It is provided with slide valve between discharge auger and malleation batcher；
(4) mud is clamp-oned in solid pump by malleation batcher；
(5) solid pump forces down frictional resistance compound pipeline complex pipeline by sludge pumping to spray gun by height；
(6) trash separator is set on pipeline for filtering bulk impurity；
(7) burn in mud is sprayed into cement decomposing furnace by spray gun dispersedly.
Owing to mud containing the reproducibility compositions such as some Ammonia (NHi), cyanogen (HCN), hydrocarbon root (CHi), nitrogen oxides (NOX) in cement kiln flue gas can be reduced into nitrogen (N2), reduce nitrogen oxides in cement kiln flue gas (NOX) discharge.
Regression equation is as follows:
The NOx in reducing gas product is carried out by the homogeneous chemical reaction of Ammonia (NHi), cyanogen (HCN), hydrocarbon root (CHi) etc. in burning mud volatile matter with NOx.
The homogeneous chemical reaction of mud volatile matter reduction NOx: in reducing atmosphere, NO and Ammonia (NHi) and nitrogen-atoms (N) react and generate N2:
NO+NH→N2+OH (1)
NO+NH2→N2+H2O (2)
NO+N→N2+O (3)
In reducing atmosphere, NO and hydrocarbon root (CHi) combine and generate cyanogen (HCN):
NO+CH→HCN+O (4)
NO+CH2→HCN+OH (5)
NO+CH3→HCN+H2O (6)
Then HCN Yu O, OH are by following reaction generation intermediate product cyanogen oxide:
HCN+O→NCO+H (7)
HCN+OH→HNCO+H (8)
Cyanogen oxide is converted into Ammonia in reducing atmosphere:
NCO+H→NH+CO (9)
HNCO+H→NH2+CO (10)
NH+H→N+H2 (11)
NH2+NH2→NH3+NH (12)
Cement kiln synergic processing mud general quantity is 0.04 ton of mud/ton grog, and nitrogen oxides reduction of discharging rate is up to about 35%.
In step (1), mud is the municipal sludge that sewage treatment plant produces, ensure wherein to contain the reproducibility compositions such as Ammonia (NHi), cyanogen (HCN), hydrocarbon root (CHi), nitrogen oxides (NOX) in cement kiln flue gas can be reduced into nitrogen (N2), reduce nitrogen oxides in cement kiln flue gas (NOX) discharge.
In step (1), the moisture content of mud is about 80%, it is ensured that mud transporting resistance is little, and the mud of ejection is in fluidized state.
In this utility model, underground type sludge bin is rectangle structure, carbon steel preservative treatment, and underground type sludge bin is placed on underground and is easy to mud transport vehicle and topples over mud, and Cang Ding is provided with charge level detector, can automatically detect, reports to the police and show in real time material position.
In this utility model, broken arch balladeur train effect is broken arch, has high viscosity, easily produce arch camber, the viscous situation such as storehouse, blocking in storehouse in mud, and mud can be drawn off sludge bin by broken arch balladeur train continuously.
In this utility model, discharge auger is single shaft discharge auger, and its effect is to receive the mud that the conveying of broken arch balladeur train comes, and is delivered to by mud in malleation batcher.
In this utility model, slide valve, when solid pump repair and maintenance, prevents mud from falling.
In this utility model, malleation batcher is double-shaft spiral batcher, can be clamp-oned in solid pump by mud.
In this utility model, it is a kind of composite that height forces down frictional resistance compound pipeline complex pipeline, and employing seamless steel pipe is base material, and steel pipe internal-surface is combined with low friction resistance material.This pipeline has the features such as coefficient of friction is little, wear-resistant, corrosion-resistant, high pressure resistant, it is ensured that material circulates, without blocking.
In this utility model, solid pump is a kind of displacement pump, adaptable to material, has a high-pressure delivery characteristic, suitably the thick soft solid materials such as conveying mud.
In this utility model, cake mass in mud can effectively be removed by trash separator, prevents from blocking spray gun.
In this utility model, the mud that spray gun utilizes compressed air pumping to be come fully is broken up and is sprayed in cement decomposing furnace, and the mud after dispersion can be rapidly completed the processes such as moisture evaporation, volatile combustion, reduces the impact on cement sintering conditions.
In this utility model, the temperature general control in cement decomposing furnace is at 850 ± 50 DEG C.Moisture in the wet mud of cement decomposing furnace high temperature evaporation, mud organic principle starts to burn, and mud inorganic constituents kiln-firing together with cement raw material becomes clinker.
Claims (7)
- null1. the wet mud of cement kiln synergic processing reduce the system of discharged nitrous oxides，Including the underground type sludge bin being arranged on below ground，It is characterized in that: below underground type sludge bin, be sequentially provided with discharge auger、Malleation batcher、Solid pump，Described underground type sludge bin inner bottom part is connected with discharge auger charging aperture by broken arch balladeur train，The discharging opening of discharge auger is connected with the charging aperture of malleation batcher by pipeline，And on pipeline, slide valve is installed between discharge auger and malleation batcher，The discharging opening of malleation batcher is connected with the charging aperture of solid pump by pipeline，It is additionally provided with spray gun outside the ground at underground type sludge bin place、Cement decomposing furnace，Described solid pump discharging opening forces down frictional resistance compound pipeline complex pipeline by height and is connected with spray gun feed mouth，And height forces down and is provided with trash separator on frictional resistance compound pipeline complex pipeline，The spout of spray gun is passed through in cement decomposing furnace.
- The wet mud of a kind of cement kiln synergic processing the most according to claim 1 also reduces the system of discharged nitrous oxides, it is characterized in that: described underground type sludge bin is rectangle structure, surface carbon steel preservative treatment, underground type sludge bin is placed on underground and is easy to mud transport vehicle and topples over mud, the Cang Ding of underground type sludge bin is provided with charge level detector, can automatically detect, reports to the police and show in real time material position.
- The wet mud of a kind of cement kiln synergic processing the most according to claim 1 also reduces the system of discharged nitrous oxides, it is characterised in that: described discharge auger uses single shaft discharge auger.
- The wet mud of a kind of cement kiln synergic processing the most according to claim 1 also reduces the system of discharged nitrous oxides, it is characterised in that: described malleation batcher uses double-shaft spiral batcher.
- The wet mud of a kind of cement kiln synergic processing the most according to claim 1 also reduces the system of discharged nitrous oxides, it is characterised in that: described height forces down frictional resistance compound pipeline complex pipeline and uses seamless steel pipe to be base material, and seamless steel pipe interior surface is combined low friction resistance material.
- The wet mud of a kind of cement kiln synergic processing the most according to claim 1 also reduces the system of discharged nitrous oxides, it is characterised in that: described solid pump is a kind of displacement pump.
- The wet mud of a kind of cement kiln synergic processing the most according to claim 1 also reduces the system of discharged nitrous oxides, it is characterised in that: the mud that described spray gun utilizes compressed air solid pump to be brought fully is broken up and is sprayed in cement decomposing furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521140039.XU CN205461776U (en) | 2015-12-31 | 2015-12-31 | System for cement kiln is dealt with wet mud in coordination and is fallen low nitrogen oxide and discharge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521140039.XU CN205461776U (en) | 2015-12-31 | 2015-12-31 | System for cement kiln is dealt with wet mud in coordination and is fallen low nitrogen oxide and discharge |
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| Publication Number | Publication Date |
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| CN205461776U true CN205461776U (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521140039.XU Expired - Fee Related CN205461776U (en) | 2015-12-31 | 2015-12-31 | System for cement kiln is dealt with wet mud in coordination and is fallen low nitrogen oxide and discharge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498520A (en) * | 2015-12-31 | 2016-04-20 | 中建材（合肥）环境与资源科技有限公司 | System for co-processing wet sludge and reducing nitrogen oxide emission of cement kiln |
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2015
- 2015-12-31 CN CN201521140039.XU patent/CN205461776U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498520A (en) * | 2015-12-31 | 2016-04-20 | 中建材（合肥）环境与资源科技有限公司 | System for co-processing wet sludge and reducing nitrogen oxide emission of cement kiln |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20181231 |