CN104496135A - Method for treating sludge by using cement kiln, and sludge gasifying cement kiln system - Google Patents
Method for treating sludge by using cement kiln, and sludge gasifying cement kiln system Download PDFInfo
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- CN104496135A CN104496135A CN201410792166.1A CN201410792166A CN104496135A CN 104496135 A CN104496135 A CN 104496135A CN 201410792166 A CN201410792166 A CN 201410792166A CN 104496135 A CN104496135 A CN 104496135A
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- dewatered sludge
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- 239000010802 sludge Substances 0.000 title claims abstract description 238
- 239000004568 cement Substances 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 116
- 238000002309 gasification Methods 0.000 claims abstract description 52
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 17
- 239000002893 slag Substances 0.000 claims abstract description 15
- 239000008187 granular material Substances 0.000 claims description 61
- 238000002156 mixing Methods 0.000 claims description 36
- 239000000126 substance Substances 0.000 claims description 32
- 238000001035 drying Methods 0.000 claims description 31
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 28
- 239000011707 mineral Substances 0.000 claims description 28
- 235000010755 mineral Nutrition 0.000 claims description 28
- 239000002956 ash Substances 0.000 claims description 24
- 239000002028 Biomass Substances 0.000 claims description 22
- 239000010865 sewage Substances 0.000 claims description 22
- 239000000567 combustion gas Substances 0.000 claims description 20
- 239000011236 particulate material Substances 0.000 claims description 20
- 239000003245 coal Substances 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 15
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 10
- 238000009423 ventilation Methods 0.000 claims description 10
- 238000000354 decomposition reaction Methods 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 5
- 235000012255 calcium oxide Nutrition 0.000 claims description 5
- 239000010881 fly ash Substances 0.000 claims description 5
- 239000010813 municipal solid waste Substances 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 3
- -1 then Substances 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 9
- 239000002817 coal dust Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000013058 crude material Substances 0.000 abstract 2
- 239000002737 fuel gas Substances 0.000 abstract 2
- 241000196324 Embryophyta Species 0.000 description 16
- 230000007423 decrease Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 6
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000002386 leaching Methods 0.000 description 4
- 235000012054 meals Nutrition 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002013 dioxins Chemical class 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 150000002240 furans Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- 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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
-
- 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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/125—Fuels from renewable energy sources, e.g. waste or biomass
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for treating sludge by using a cement kiln, and a sludge gasifying cement kiln system. The method for treating sludge by using the cement kiln comprises the following steps: making wet sludge into dry sludge particles, then gasifying the dry sludge particles, sending the fuel gas obtained after gasification into a decomposing furnace, and sending ash obtained after gasification into a crude material system. The sludge gasifying cement kiln system comprises a cement kiln and a decomposing furnace, wherein an inlet of the cement kiln is communicated with an outlet of the decomposing furnace, and a gas inlet of the decomposing furnace is communicated with a gas outlet of a gasifying furnace through a fuel gas pipeline; a feed opening of the gasifying furnace is communicated with a warehouse through a conveying system, and a slag outlet of the gasifying furnace is communicated with the crude material system through a slagging system. According to the method and the sludge gasifying cement kiln system provided by the invention, the treatment scale of sludge can be greatly improved; the difference between the form of solid sludge directly sent to the kiln and the fineness of coal dust as well as a cement raw material is reduced, and the mass and heat transfer effect is increased.
Description
Technical field
The present invention relates to a kind of method of disposal and system of mud, particularly relate to a kind of method and sludge gasification quality coal in cement kiln systems of cement kiln disposing sludge.
Background technology
Cement industry is one of China industrial circle energy consumption rich and influential family, accounts for 6.5% of national total energy consumption.Cement industry fuel consumption accounts for 75% of cement industry total energy consumption, and coal accounts for nearly 100% of total fuel consumption.Seek to use alternative fuel to meet the strategy of China's energy structure optimizing and the displacement of Cement industry production capacity.
Along with the construction of urban wastewater treatment facility, sewage plant sludge and sewage sludge become a new Urban Environmental Problem.Moisture percentage in sewage sludge about 80% after Sewage Plant mechanical dehydration.The conventional method of disposal such as landfill, burning, compost is difficult to the environmental emission standard and the resource utilization needs that adapt to increasingly stringent.Because the main chemical compositions of mud comprises SiO
2, Fe
20
3, and A1
2o
3, more similar with the siliceous raw material in cement raw material, can be used for Some substitute siliceous raw material in theory prepares burden, and its calorific value can be used as fuel and uses.Therefore utilizing cement kiln synergic processing town sewage plant mud, is a kind of economy, feasible recycling mode.But concerning cement kiln synergic processing mud utilizes, moisture, calorific value and physical dimension are the important factors affecting cement kiln mass-producing and stability disposing sludge.Wet sludge calorific value is low, directly enters kiln and can form floc sedimentation shape structure, causes cement kiln temperature to decline and worsens combustion conditions.Affect the yield and quality of grog.Moisture content is high in addition, will increase the load of exhaust gas volumn and exhaust-gas treatment facilities, easily produce foul gas.
Domestic and international cement kiln disposing sludge is all that after utilizing mummification, single-point enters kiln technology, does not have sludge gasification to enter the case of cement kiln at present in the world.In prior art, be first mud is transported to cement mill from Sewage Plant with the main common ground of cement kiln disposing sludge, recycling cement kiln waste heat carries out ovens dry deodorizing to mud and directly enters decomposing furnace and burn, due to mud conglomeration and skewness, dispose small, and energy consumption is higher.Zaozhuang, Shandong Province Zhong Lian cement limited liability company builds up dewatered sludge (water ratio about 75%) the demonstration line that 60 ton per days dispose Zaozhuang Sewage Plant.
Summary of the invention
The technical problem that the present invention will solve is to provide a kind of method of cement kiln disposing sludge, and the method can improve the disposal scale of mud greatly.
Another technical problem that the present invention will solve is to provide a kind of sludge gasification quality coal in cement kiln systems, and this system can improve the disposal scale of mud greatly.
With regard to method, in order to solve an above-mentioned technical problem, the method for the present invention's cement kiln disposing sludge first wet mud is made dewatered sludge particle, again dewatered sludge particle is gasified, then, decomposing furnace is sent in the combustion gas obtained, the lime-ash obtained after gasification is sent into Raw Material System after gasification.
Described dewatered sludge particle of being made by wet mud is first by adding mineral substance and/or biomass in the wet mud of Sewage Plant or water drain, moisture in wet mud is reduced to 40-50%, again the mud after reduction moisture is made wet mud granule, then, mud granule ventilation mummification of wetting forms dewatered sludge particle.
Describedly moisture in wet mud is reduced to 40-50% carries out in mud mixing machine, described wet mud is squeezed in described mud mixing machine by sludge pump, described mineral substance is flyash and/or unslaked lime, described mineral substance adds in described mud mixing machine by mineral substance measuring apparatus, describedly make wet mud granule realized reducing the mud after moisture by sludge granulator, describedly send into described sludge granulator by reducing the mud after moisture by rotary conveyor, described wet mud granule ventilation mummification to be realized by mud granule drying device, described wet mud granule sends into described mud granule drying device by forklift, the moisture content of described dewatered sludge particle is 20-30%, described dewatered sludge particle is transported in the dewatered sludge particulate material storehouse in cement mill by dewatered sludge particulate transportation car.
Described biomass are garbage waste materials, and described biomass are added in described mud mixing machine by biomass measuring apparatus.
Described gasification by dewatered sludge particle carries out in dewatered sludge particle vapourizing furnace, described dewatered sludge particle sends into dewatered sludge particle vapourizing furnace by dewatered sludge particle transport system, described combustion gas sends into decomposing furnace by pipeline, and described lime-ash sends into Raw Material System by dreg removing system.
Described combustion gas sends into decomposing furnace when temperature is more than or equal to 900 DEG C, and the temperature in cement kiln is more than or equal to 1450 DEG C.
The method of the present invention's cement kiln disposing sludge compared with prior art has following beneficial effect.
1, wet mud is first made dewatered sludge particle owing to have employed by the technical program, then is gasified by dewatered sludge particle, then, decomposing furnace is sent in the combustion gas obtained after gasification, the lime-ash obtained after gasification is sent into the technique means of Raw Material System, so, greatly can improve the disposal scale of mud; Decrease solid sludges and directly enter difference between its form of kiln and coal dust, cement raw material fineness, add mass-and heat-transfer effect; Tangentially enter cement kiln decomposition furnace system by combustion gas, solid sludges can be avoided directly to enter kiln burning insufficient and cause the problem of sinter leaching quality; Because lime-ash burn-off rate is high, be rich in the elements such as silico-calcium, send into cement kiln Raw Material System, can be used as cement kiln raw meal proportioning, solve lime-ash problem of outlet.
2, the technical program is first by adding mineral substance in the wet mud of Sewage Plant or water drain owing to have employed described dewatered sludge particle of being made by wet mud, moisture in wet mud is reduced to 40-50%, again the mud after reduction moisture is made wet mud granule, then, wet mud granule ventilation mummification is formed the technique means of dewatered sludge particle, so, the moisture in mud can be reduced, be conducive to the transport to mud, improve the calorific value of mud, for the disposal amount improving mud creates favourable condition, enhance the adaptability of cement kiln to sludge disposal; By sewage plant sludge is mixed preliminary precipitation and drying particles precipitation with additive, reach low cost precipitation, the cement kiln achieving dewatered sludge is disposed; Because mud with the addition of the additive such as mineral substance, biomass, both reduce moisture and also inhibits foul smell, decrease deodoration system investment.
3, moisture in wet mud is describedly reduced to 40-50% owing to have employed and carries out in mud mixing machine by the technical program, described wet mud is squeezed in described mud mixing machine by sludge pump, described mineral substance is flyash and/or unslaked lime, described mineral substance adds in described mud mixing machine by mineral substance measuring apparatus, describedly make wet mud granule realized reducing the mud after moisture by sludge granulator, describedly send into described sludge granulator by reducing the mud after moisture by rotary conveyor, described wet mud granule ventilation mummification to be realized by mud granule drying device, described wet mud granule sends into described mud granule drying device by forklift, the moisture content of described dewatered sludge particle is 20-30%, described dewatered sludge particle is transported to the technique means in the dewatered sludge particulate material storehouse in cement mill by dewatered sludge particulate transportation car, so, substantially reduce the investment of equipment, be conducive to applying by cement kiln disposing sludge method.
4, the technical program is garbage waste materials owing to have employed described biomass, described biomass are the technique means of being added to by biomass measuring apparatus in described mud mixing machine, so, the cost of sludge pretreatment can be greatly reduced, increase the calorific value of mud further.
5, the technical program due to have employed described by dewatered sludge particle gasification carry out in dewatered sludge particle vapourizing furnace, described dewatered sludge particle sends into dewatered sludge particle vapourizing furnace by dewatered sludge particle transport system, described combustion gas sends into decomposing furnace by pipeline, described lime-ash sends into the technique means of Raw Material System by dreg removing system, so, not only make the whole resource utilization of mud, and, flow process is simple, and disposal amount is large.
6, the technical program sends into decomposing furnace owing to have employed described combustion gas when temperature is more than or equal to 900 DEG C, temperature in cement kiln is more than or equal to the technique means of 1450 DEG C, so, complete harmlessness disposing can be realized, can thoroughly eliminate the objectionable impurities such as Dioxins, furans, and these objectionable impuritiess there will not be the hidden danger of regeneration; Significantly can reduce the acid gas emissions such as cement kiln oxynitride oxysulfide; Realize waste zero release, cement kiln does not produce flying dust and slag, does not have the problem of secondary pollution.
With regard to system, in order to solve another above-mentioned technical problem, sludge gasification quality coal in cement kiln systems of the present invention, comprise cement kiln Sum decomposition stove, the import of described cement kiln and the outlet of described decomposing furnace, the inlet mouth of described decomposing furnace is communicated with by gas pipeline with the air outlet of dewatered sludge particle vapourizing furnace, the opening for feed of described dewatered sludge particle vapourizing furnace is communicated with dewatered sludge particulate material storehouse by dewatered sludge particle transport system, and the slag notch of described dewatered sludge particle vapourizing furnace is communicated with Raw Material System by dreg removing system.
Described dewatered sludge particle vapourizing furnace is vertical fixing vapourizing furnace, the air outlet of described mud granule vapourizing furnace is arranged on the top in face, described vertical fixing gasification furnace side, the opening for feed of described dewatered sludge particle vapourizing furnace is arranged on the central authorities of described vertical fixing gasification furnace top surface, the ash output hole of described dewatered sludge particle vapourizing furnace is arranged on the central authorities in described vertical fixing gasification furnace bottom face, described gas pipeline is configured with baffle door, described dewatered sludge particle transport system comprises grab mechanisms, stepped start-stop system feeding machine and the double roll feeding machine with frequency transformer, the discharge port of described double roll feeding machine is positioned at the top of the opening for feed of described dewatered sludge particle vapourizing furnace down, the opening for feed of described double roll feeding machine upward, the discharge port of described stepped start-stop system feeding machine is positioned at the top of described double roll feeding machine inlet capable down, the opening for feed of described stepped start-stop system feeding machine is positioned at described dewatered sludge particulate material storehouse upward, described grab mechanisms is arranged in described dewatered sludge particulate material storehouse, the blanking position of described grab mechanisms is positioned at the top of described stepped start-stop system feeding machine opening for feed, described dreg removing system comprises Residue extraction pipeline, slag notch near described dewatered sludge particle vapourizing furnace on described Residue extraction pipeline is provided with mucking machine.
Described sludge gasification quality coal in cement kiln systems also comprises the mud mixing machine, sludge granulator and the mud granule drying device that are arranged on Sewage Plant; described mud mixing machine is configured with sludge pump and mineral substance measuring apparatus; rotary conveyor is configured with between described mud mixing machine and described sludge granulator; be configured with forklift between described sludge granulator and described mud granule drying device, between described Sewage Plant and cement mill, be configured with dewatered sludge particulate transportation car.
Described mud granule drying device comprises the barrier of rectangle, is provided with multiple stage blower fan below the barrier of described rectangle.
Sludge gasification quality coal in cement kiln systems of the present invention compared with prior art has following beneficial effect.
1, the technical program is communicated with by gas pipeline with the air outlet of dewatered sludge particle vapourizing furnace due to the inlet mouth that have employed described decomposing furnace, the opening for feed of described dewatered sludge particle vapourizing furnace is communicated with dewatered sludge particulate material storehouse by dewatered sludge particle transport system, the technique means that the slag notch of described dewatered sludge particle vapourizing furnace is communicated with Raw Material System by dreg removing system, so, greatly can improve the disposal scale of mud; Decrease solid sludges and directly enter difference between its form of kiln and coal dust, cement raw material fineness, add mass-and heat-transfer effect; Tangentially enter cement kiln decomposition furnace system by combustion gas, solid sludges can be avoided directly to enter kiln burning insufficient and cause the problem of sinter leaching quality; Because lime-ash burn-off rate is high, be rich in the elements such as silico-calcium, send into cement kiln Raw Material System, can be used as cement kiln raw meal proportioning, solve lime-ash problem of outlet.
2, the technical program is vertical fixing vapourizing furnace owing to have employed described dewatered sludge particle vapourizing furnace, the air outlet of described mud granule vapourizing furnace is arranged on the top in face, described vertical fixing gasification furnace side, the opening for feed of described dewatered sludge particle vapourizing furnace is arranged on the central authorities of described vertical fixing gasification furnace top surface, the ash output hole of described dewatered sludge particle vapourizing furnace is arranged on the central authorities in described vertical fixing gasification furnace bottom face, described gas pipeline is configured with baffle door, described dewatered sludge particle transport system comprises grab mechanisms, stepped start-stop system feeding machine and the double roll feeding machine with frequency transformer, the discharge port of described double roll feeding machine is positioned at the top of the opening for feed of described dewatered sludge particle vapourizing furnace down, the opening for feed of described double roll feeding machine upward, the discharge port of described stepped start-stop system feeding machine is positioned at the top of described double roll feeding machine inlet capable down, the opening for feed of described stepped start-stop system feeding machine is positioned at described dewatered sludge particulate material storehouse upward, described grab mechanisms is arranged in described dewatered sludge particulate material storehouse, the blanking position of described grab mechanisms is positioned at the top of described stepped start-stop system feeding machine opening for feed, described dreg removing system comprises Residue extraction pipeline, described Residue extraction pipeline is provided with the technique means of mucking machine near the slag notch of described dewatered sludge particle vapourizing furnace, so, equipment is simple, the low cost of manufacture of equipment, feeding is even, ensure the burning quality of mud.
3, the technical program also comprises owing to have employed described sludge gasification quality coal in cement kiln systems the mud mixing machine being arranged on Sewage Plant, sludge granulator and mud granule drying device, described mud mixing machine is configured with sludge pump and mineral substance measuring apparatus, rotary conveyor is configured with between described mud mixing machine and described sludge granulator, forklift is configured with between described sludge granulator and described mud granule drying device, the technique means of dewatered sludge particulate transportation car is configured with between described Sewage Plant and cement mill, so, not only can reduce the manufacturing cost of equipment widely, and, greatly reduce the transportation cost of mud.
4, the technical program comprises the barrier of rectangle owing to have employed described mud granule drying device, the technique means of multiple stage blower fan is provided with below the barrier of described rectangle, so, the structure of mud granule drying device is simple, reduce further the manufacturing cost of mud granule drying device, improve the mummification efficiency of mud granule.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the method for the present invention's cement kiln disposing sludge and sludge gasification quality coal in cement kiln systems are described in further detail.
Fig. 1 is the method schematic diagram of the present invention's cement kiln disposing sludge.
Fig. 2 is sludge gasification quality coal in cement kiln systems schematic diagram of the present invention.
Embodiment
As depicted in figs. 1 and 2, the method of present embodiment cement kiln disposing sludge first wet mud is made dewatered sludge particle, then gasified by dewatered sludge particle, then, decomposing furnace 2 is sent in the combustion gas obtained after gasification, the lime-ash obtained after gasification is sent into Raw Material System 11.Preferred as one, described dewatered sludge particle gasification is degassing of heat another part dewatered sludge particle by being produced by a part of dewatered sludge particle burning thus generation combustion gas.Greatly can save the consumption of the energy like this.
Wet mud is first made dewatered sludge particle owing to have employed by present embodiment, then is gasified by dewatered sludge particle, then, decomposing furnace is sent in the combustion gas obtained after gasification, the lime-ash obtained after gasification is sent into the technique means of Raw Material System, so, greatly can improve the disposal scale of mud; Decrease solid sludges and directly enter difference between its form of kiln and coal dust, cement raw material fineness, add mass-and heat-transfer effect; Tangentially enter cement kiln decomposition furnace system by combustion gas, solid sludges can be avoided directly to enter kiln burning insufficient and cause the problem of sinter leaching quality; Because lime-ash burn-off rate is high, be rich in the elements such as silico-calcium, send into cement kiln Raw Material System, can be used as cement kiln raw meal proportioning, solve lime-ash problem of outlet.
One as present embodiment is improved, as depicted in figs. 1 and 2, described dewatered sludge particle of being made by wet mud is first by adding mineral substance and/or biomass in the wet mud of Sewage Plant A or water drain, moisture in wet mud is reduced to 40-50%, again the mud after reduction moisture is made wet mud granule, then, mud granule ventilation mummification of wetting forms dewatered sludge particle.
Present embodiment is first by adding mineral substance in the wet mud of Sewage Plant or water drain owing to have employed described dewatered sludge particle of being made by wet mud, moisture in wet mud is reduced to 40-50%, again the mud after reduction moisture is made wet mud granule, then, wet mud granule ventilation mummification is formed the technique means of dewatered sludge particle, so, the moisture in mud can be reduced, be conducive to the transport to mud, improve the calorific value of mud, for the disposal amount improving mud creates favourable condition, enhance the adaptability of cement kiln to sludge disposal; By sewage plant sludge is mixed preliminary precipitation and drying particles precipitation with additive, reach low cost precipitation, the cement kiln achieving dewatered sludge is disposed; Because mud with the addition of the additive such as mineral substance, biomass, both reduce moisture and also inhibits foul smell, decrease deodoration system investment.
Further improve as present embodiment, as depicted in figs. 1 and 2, describedly moisture in wet mud is reduced to 40-50% carries out in mud mixing machine 12, described wet mud is squeezed in described mud mixing machine 12 by sludge pump 13, described mineral substance is flyash and/or unslaked lime, described mineral substance adds in described mud mixing machine 12 by mineral substance measuring apparatus 14, describedly make wet mud granule realized reducing the mud after moisture by sludge granulator 17, describedly send into described sludge granulator 17 by reducing the mud after moisture by rotary conveyor 16, described wet mud granule ventilation mummification to be realized by mud granule drying device 19, described wet mud granule sends into described mud granule drying device 19 by forklift 18, the moisture content of described dewatered sludge particle is 20-30%, described dewatered sludge particle is transported in the dewatered sludge particulate material storehouse 21 of cement mill B by dewatered sludge particulate transportation car 20.
Moisture in wet mud is describedly reduced to 40-50% owing to have employed and carries out in mud mixing machine by present embodiment, described wet mud is squeezed in described mud mixing machine by sludge pump, described mineral substance is flyash and/or unslaked lime, described mineral substance adds in described mud mixing machine by mineral substance measuring apparatus, describedly make wet mud granule realized reducing the mud after moisture by sludge granulator, describedly send into described sludge granulator by reducing the mud after moisture by rotary conveyor, described wet mud granule ventilation mummification to be realized by mud granule drying device, described wet mud granule sends into described mud granule drying device by forklift, the moisture content of described dewatered sludge particle is 20-30%, described dewatered sludge particle is transported to the technique means in the dewatered sludge particulate material storehouse in cement mill by dewatered sludge particulate transportation car, so, substantially reduce the investment of equipment, be conducive to applying by cement kiln disposing sludge method.
Further improve as present embodiment, as depicted in figs. 1 and 2, described biomass are garbage waste materials, and described biomass are added in described mud mixing machine 12 by biomass measuring apparatus 15.
Present embodiment is garbage waste materials owing to have employed described biomass, described biomass are the technique means of being added to by biomass measuring apparatus in described mud mixing machine, so, the cost of sludge pretreatment can be greatly reduced, increase the calorific value of mud further.
Further improve as present embodiment, as depicted in figs. 1 and 2, described gasification by dewatered sludge particle carries out in dewatered sludge particle vapourizing furnace 3, described dewatered sludge particle sends into dewatered sludge particle vapourizing furnace 3 by dewatered sludge particle transport system 4,5,6, described combustion gas sends into decomposing furnace 2 by pipeline 7, and described lime-ash sends into Raw Material System 11 by dreg removing system 9,10.
Present embodiment due to have employed described by dewatered sludge particle gasification carry out in dewatered sludge particle vapourizing furnace, described dewatered sludge particle sends into dewatered sludge particle vapourizing furnace by dewatered sludge particle transport system, described combustion gas sends into decomposing furnace by pipeline, described lime-ash sends into the technique means of Raw Material System by dreg removing system, so, not only make the whole resource utilization of mud, and, flow process is simple, and disposal amount is large.
Further improve as present embodiment, as depicted in figs. 1 and 2, described combustion gas sends into decomposing furnace when temperature is more than or equal to 900 DEG C, and the temperature in cement kiln is more than or equal to 1450 DEG C.
Present embodiment sends into decomposing furnace owing to have employed described combustion gas when temperature is more than or equal to 900 DEG C, temperature in cement kiln is more than or equal to the technique means of 1450 DEG C, so, complete harmlessness disposing can be realized, can thoroughly eliminate the objectionable impurities such as Dioxins, furans, and these objectionable impuritiess there will not be the hidden danger of regeneration; Significantly can reduce the acid gas emissions such as cement kiln oxynitride oxysulfide; Realize waste zero release, cement kiln does not produce flying dust and slag, does not have the problem of secondary pollution.
As shown in Figure 2, sludge gasification quality coal in cement kiln systems of the present invention, comprise cement kiln 1 Sum decomposition stove 2, the import of described cement kiln 1 and the outlet of described decomposing furnace 2, the inlet mouth of described decomposing furnace 2 is communicated with by gas pipeline 7 with the air outlet of dewatered sludge particle vapourizing furnace 3, the opening for feed of described dewatered sludge particle vapourizing furnace 3 is communicated with dewatered sludge particulate material storehouse 21 by dewatered sludge particle transport system 4,5,6, and the slag notch of described dewatered sludge particle vapourizing furnace 3 is communicated with Raw Material System 11 by dreg removing system 9,10.
Present embodiment is communicated with by gas pipeline with the air outlet of dewatered sludge particle vapourizing furnace due to the inlet mouth that have employed described decomposing furnace, the opening for feed of described dewatered sludge particle vapourizing furnace is communicated with dewatered sludge particulate material storehouse by dewatered sludge particle transport system, the technique means that the slag notch of described dewatered sludge particle vapourizing furnace is communicated with Raw Material System by dreg removing system, so, greatly can improve the disposal scale of mud; Decrease solid sludges and directly enter difference between its form of kiln and coal dust, cement raw material fineness, add mass-and heat-transfer effect; Tangentially enter cement kiln decomposition furnace system by combustion gas, solid sludges can be avoided directly to enter kiln burning insufficient and cause the problem of sinter leaching quality; Because lime-ash burn-off rate is high, be rich in the elements such as silico-calcium, send into cement kiln Raw Material System, can be used as cement kiln raw meal proportioning, solve lime-ash problem of outlet.
One as present embodiment is improved, as shown in Figure 2, described dewatered sludge particle vapourizing furnace 3 is vertical fixing vapourizing furnaces, the air outlet of described mud granule vapourizing furnace 3 is arranged on the top in face, described vertical fixing gasification furnace side, the opening for feed of described dewatered sludge particle vapourizing furnace 3 is arranged on the central authorities of described vertical fixing gasification furnace top surface, the ash output hole of described dewatered sludge particle vapourizing furnace 3 is arranged on the central authorities in described vertical fixing gasification furnace bottom face, described gas pipeline 7 is configured with baffle door 8, described dewatered sludge particle transport system 4, 5, 6 comprise grab mechanisms 4, stepped start-stop system feeding machine 5 and the double roll feeding machine 6 with frequency transformer, the discharge port of described double roll feeding machine 6 is positioned at the top of the opening for feed of described dewatered sludge particle vapourizing furnace 3 down, the opening for feed of described double roll feeding machine 6 upward, the discharge port of described stepped start-stop system feeding machine 5 is positioned at the top of described double roll feeding machine 6 opening for feed down, the opening for feed of described stepped start-stop system feeding machine 5 is positioned at described dewatered sludge particulate material storehouse 21 upward, described grab mechanisms 4 is arranged in described dewatered sludge particulate material storehouse 21, the blanking position of described grab mechanisms 4 is positioned at the top of described stepped start-stop system feeding machine 5 opening for feed, described dreg removing system 9, 10 comprise Residue extraction pipeline 9, slag notch near described dewatered sludge particle vapourizing furnace 3 on described Residue extraction pipeline 9 is provided with mucking machine 10.Preferred as one, bottom in described dewatered sludge particle vapourizing furnace 3 is provided with comb formula supporting disk, the central authorities of described comb formula supporting disk 3-1 are fixed with supporter 3-2, the central authorities of described supporter 3-2 are provided with axis hole, rotation axis 3-3 is provided with in described axis hole, the top of described rotation axis is fixed with tower ash-pan 3-4, described tower ash-pan 3-4 is made up of the circular fire grate of the different size of multilayer, fire grate described in multilayer is fixed on the top of described rotation axis according to order from big to small from top to bottom, with vertical shape cast iron 3-10 above every layer of described fire grate, bevel gear wheel dish 3-5 is circumferentially provided with below nethermost large fire grate, described bevel gear wheel dish 3-5 is furnished with bevel pinion 3-6, described bevel pinion 3-6 is fixed with transmission shaft 3-7, described transmission shaft 3-7 passes the sidewall of described dewatered sludge particle vapourizing furnace 3 and is fixedly connected with the rotation axis of electric motor 3-8, described electric motor 3-8 is fixed on the support 3-9 of described dewatered sludge particle vapourizing furnace 3.Lime-ash can be made like this to fall to the slag notch of described dewatered sludge particle vapourizing furnace 3 along the edge of tower ash-pan 3-4.Described slag notch is provided with vaporized chemical input unit 23, and described vaporized chemical is air, and described vaporized chemical input unit 23 is blower fans.Gasification efficiency can be improved like this.
Present embodiment is vertical fixing vapourizing furnace owing to have employed described dewatered sludge particle vapourizing furnace, the air outlet of described mud granule vapourizing furnace is arranged on the top in face, described vertical fixing gasification furnace side, the opening for feed of described dewatered sludge particle vapourizing furnace is arranged on the central authorities of described vertical fixing gasification furnace top surface, the ash output hole of described dewatered sludge particle vapourizing furnace is arranged on the central authorities in described vertical fixing gasification furnace bottom face, described gas pipeline is configured with baffle door, described dewatered sludge particle transport system comprises grab mechanisms, stepped start-stop system feeding machine and the double roll feeding machine with frequency transformer, the discharge port of described double roll feeding machine is positioned at the top of the opening for feed of described dewatered sludge particle vapourizing furnace down, the opening for feed of described double roll feeding machine upward, the discharge port of described stepped start-stop system feeding machine is positioned at the top of described double roll feeding machine inlet capable down, the opening for feed of described stepped start-stop system feeding machine is positioned at described dewatered sludge particulate material storehouse upward, described grab mechanisms is arranged in described dewatered sludge particulate material storehouse, the blanking position of described grab mechanisms is positioned at the top of described stepped start-stop system feeding machine opening for feed, described dreg removing system comprises Residue extraction pipeline, described Residue extraction pipeline is provided with the technique means of mucking machine near the slag notch of described dewatered sludge particle vapourizing furnace, so, equipment is simple, the low cost of manufacture of equipment, feeding is even, ensure the burning quality of mud.
Further improve as present embodiment; as shown in Figure 2; described sludge gasification quality coal in cement kiln systems also comprises the sludge sump 22 being arranged on Sewage Plant A; mud mixing machine 12, sludge granulator 17 and mud granule drying device 19; described mud mixing machine 12 is configured with sludge pump 13 and mineral substance measuring apparatus 14, and described mineral substance measuring apparatus 14 also can be used for biomass measuring apparatus.Certainly, also can be that described mud mixing machine 12 is separately configured with biomass measuring apparatus 15.Rotary conveyor 16 is configured with between described mud mixing machine 12 and described sludge granulator 17; be configured with forklift 18 between described sludge granulator 17 and described mud granule drying device 19, between described Sewage Plant A and cement mill B, be configured with dewatered sludge particulate transportation car 20.
Present embodiment also comprises owing to have employed described sludge gasification quality coal in cement kiln systems the mud mixing machine being arranged on Sewage Plant, sludge granulator and mud granule drying device, described mud mixing machine is configured with sludge pump and mineral substance measuring apparatus, rotary conveyor is configured with between described mud mixing machine and described sludge granulator, forklift is configured with between described sludge granulator and described mud granule drying device, the technique means of dewatered sludge particulate transportation car is configured with between described Sewage Plant and cement mill, so, not only can reduce the manufacturing cost of equipment widely, and, greatly reduce the transportation cost of mud.
Further improve as present embodiment, as shown in Figure 2, described mud granule drying device 19 comprises the barrier 19-1 of rectangle, is provided with multiple stage blower fan 19-2 below the barrier 19-1 of described rectangle.
Present embodiment comprises the barrier of rectangle owing to have employed described mud granule drying device, the technique means of multiple stage blower fan is provided with below the barrier of described rectangle, so, the structure of mud granule drying device is simple, reduce further the manufacturing cost of mud granule drying device, improve the mummification efficiency of mud granule.
Claims (10)
1. by a method for cement kiln disposing sludge, it is characterized in that: first wet mud is made dewatered sludge particle, then dewatered sludge particle is gasified, then, decomposing furnace is sent in the combustion gas obtained after gasification, the lime-ash obtained after gasification is sent into Raw Material System.
2. the method for cement kiln disposing sludge according to claim 1, it is characterized in that: described dewatered sludge particle of being made by wet mud is first by adding mineral substance and/or biomass in the wet mud of Sewage Plant or water drain, moisture in wet mud is reduced to 40-50%, again the mud after reduction moisture is made wet mud granule, then, mud granule ventilation mummification of wetting forms dewatered sludge particle.
3. the method for cement kiln disposing sludge according to claim 2, it is characterized in that: describedly moisture in wet mud is reduced to 40-50% carries out in mud mixing machine, described wet mud is squeezed in described mud mixing machine by sludge pump, described mineral substance is flyash and/or unslaked lime, described mineral substance adds in described mud mixing machine by mineral substance measuring apparatus, describedly make wet mud granule realized reducing the mud after moisture by sludge granulator, describedly send into described sludge granulator by reducing the mud after moisture by rotary conveyor, described wet mud granule ventilation mummification to be realized by mud granule drying device, described wet mud granule sends into described mud granule drying device by forklift, the moisture content of described dewatered sludge particle is 20-30%, described dewatered sludge particle is transported in the dewatered sludge particulate material storehouse in cement mill by dewatered sludge particulate transportation car.
4. the method for cement kiln disposing sludge according to claim 2, is characterized in that: described biomass are garbage waste materials, described biomass are added in described mud mixing machine by biomass measuring apparatus.
5. the method for cement kiln disposing sludge according to claim 1, it is characterized in that: described gasification by dewatered sludge particle carries out in dewatered sludge particle vapourizing furnace, described dewatered sludge particle sends into dewatered sludge particle vapourizing furnace by dewatered sludge particle transport system, described combustion gas sends into decomposing furnace by pipeline, and described lime-ash sends into Raw Material System by dreg removing system.
6. the method for cement kiln disposing sludge according to claim 1, is characterized in that: described combustion gas sends into decomposing furnace when temperature is more than or equal to 900 DEG C, and the temperature in cement kiln is more than or equal to 1450 DEG C.
7. a sludge gasification quality coal in cement kiln systems, comprise cement kiln Sum decomposition stove, the import of described cement kiln and the outlet of described decomposing furnace, it is characterized in that: the inlet mouth of described decomposing furnace is communicated with by gas pipeline with the air outlet of dewatered sludge particle vapourizing furnace, the opening for feed of described dewatered sludge particle vapourizing furnace is communicated with dewatered sludge particulate material storehouse by dewatered sludge particle transport system, and the slag notch of described dewatered sludge particle vapourizing furnace is communicated with Raw Material System by dreg removing system.
8. sludge gasification quality coal in cement kiln systems according to claim 7, it is characterized in that: described dewatered sludge particle vapourizing furnace is vertical fixing vapourizing furnace, the air outlet of described mud granule vapourizing furnace is arranged on the top in face, described vertical fixing gasification furnace side, the opening for feed of described dewatered sludge particle vapourizing furnace is arranged on the central authorities of described vertical fixing gasification furnace top surface, the ash output hole of described dewatered sludge particle vapourizing furnace is arranged on the central authorities in described vertical fixing gasification furnace bottom face, described gas pipeline is configured with baffle door, described dewatered sludge particle transport system comprises grab mechanisms, stepped start-stop system feeding machine and the double roll feeding machine with frequency transformer, the discharge port of described double roll feeding machine is positioned at the top of the opening for feed of described dewatered sludge particle vapourizing furnace down, the opening for feed of described double roll feeding machine upward, the discharge port of described stepped start-stop system feeding machine is positioned at the top of described double roll feeding machine inlet capable down, the opening for feed of described stepped start-stop system feeding machine is positioned at described dewatered sludge particulate material storehouse upward, described grab mechanisms is arranged in described dewatered sludge particulate material storehouse, the blanking position of described grab mechanisms is positioned at the top of described stepped start-stop system feeding machine opening for feed, described dreg removing system comprises Residue extraction pipeline, slag notch near described dewatered sludge particle vapourizing furnace on described Residue extraction pipeline is provided with mucking machine.
9. sludge gasification quality coal in cement kiln systems according to claim 7; it is characterized in that: described sludge gasification quality coal in cement kiln systems also comprises the mud mixing machine, sludge granulator and the mud granule drying device that are arranged on Sewage Plant; described mud mixing machine is configured with sludge pump and mineral substance measuring apparatus; rotary conveyor is configured with between described mud mixing machine and described sludge granulator; be configured with forklift between described sludge granulator and described mud granule drying device, between described Sewage Plant and cement mill, be configured with dewatered sludge particulate transportation car.
10. sludge gasification quality coal in cement kiln systems according to claim 9, is characterized in that: described mud granule drying device comprises the barrier of rectangle, is provided with multiple stage blower fan below the barrier of described rectangle.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105694976A (en) * | 2016-03-30 | 2016-06-22 | 中冶南方工程技术有限公司 | Wet sludge gasification treatment method capable of energy self-sustaining |
| CN118026557A (en) * | 2023-12-28 | 2024-05-14 | 冀东水泥璧山有限责任公司 | Process and device for disposing solid waste in cement kiln |
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| CN103936311A (en) * | 2014-04-14 | 2014-07-23 | 北京建筑材料科学研究总院有限公司 | Method of combination of joint treatment of organic polluted soil and municipal wastes with cement kiln |
| CN204454844U (en) * | 2014-12-19 | 2015-07-08 | 北京金隅股份有限公司 | A kind of sludge gasification quality coal in cement kiln systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103936311A (en) * | 2014-04-14 | 2014-07-23 | 北京建筑材料科学研究总院有限公司 | Method of combination of joint treatment of organic polluted soil and municipal wastes with cement kiln |
| CN204454844U (en) * | 2014-12-19 | 2015-07-08 | 北京金隅股份有限公司 | A kind of sludge gasification quality coal in cement kiln systems |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105694976A (en) * | 2016-03-30 | 2016-06-22 | 中冶南方工程技术有限公司 | Wet sludge gasification treatment method capable of energy self-sustaining |
| CN118026557A (en) * | 2023-12-28 | 2024-05-14 | 冀东水泥璧山有限责任公司 | Process and device for disposing solid waste in cement kiln |
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