CN110590115A - Sludge blending combustion system of thermal power plant - Google Patents
Sludge blending combustion system of thermal power plant Download PDFInfo
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- CN110590115A CN110590115A CN201910967434.1A CN201910967434A CN110590115A CN 110590115 A CN110590115 A CN 110590115A CN 201910967434 A CN201910967434 A CN 201910967434A CN 110590115 A CN110590115 A CN 110590115A
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- boiler
- sludge
- flue gas
- thermal power
- power plant
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- 239000010802 sludge Substances 0.000 title claims abstract description 70
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 43
- 238000002156 mixing Methods 0.000 title claims description 7
- 238000001035 drying Methods 0.000 claims abstract description 60
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000003546 flue gas Substances 0.000 claims abstract description 47
- 239000003245 coal Substances 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims description 43
- 239000000843 powder Substances 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 238000001914 filtration Methods 0.000 claims description 29
- 238000006477 desulfuration reaction Methods 0.000 claims description 20
- 230000023556 desulfurization Effects 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 5
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 description 16
- 238000011010 flushing procedure Methods 0.000 description 10
- 239000000779 smoke Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 229910052815 sulfur oxide Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011268 retreatment Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
The application discloses thermal power factory mud mixes system of burning, including feeder, drying tube, fan coal pulverizer and boiler, the batcher the boiler with the fan coal pulverizer all with the drying tube is connected, the fan coal pulverizer with the boiler is connected, feeder be used for to mud is supplied with to the drying tube, the boiler with connect through high temperature flue gas pipeline between the drying tube, high temperature flue gas pipeline be used for with the partial high temperature flue gas that the boiler produced supplies with drying tube, mud are in through high temperature flue gas heating and drying in the drying tube, mud after the drying passes through fan coal pulverizer is dry, grinds and carries extremely burn in the boiler. The sludge mixed combustion system of the thermal power plant provided by the invention fully utilizes the existing boiler equipment of the thermal power plant to mix and combust the sludge, integrates the drying and combustion of the sludge, has reasonable design, simple operation and compact structure, reduces the operation and maintenance cost, and is more practical.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a sludge co-combustion system of a thermal power plant.
Background
With the development of industrialization and the acceleration of urbanization process in China, a large amount of industrial sludge and domestic sludge are generated, the sludge has high water content, contains a large amount of pathogenic bacteria, parasitic ova, chromium, mercury and other heavy metal toxic and harmful substances, is a pollutant with complex property, high pollutant content and huge potential environmental risk, and the sludge treatment problem becomes a large environmental protection problem which needs to be solved urgently in the current society. Composting and burying of such sludge may cause secondary pollution, and occupy a large amount of land, failing to meet the treatment requirements. The combustion treatment has the advantages of volume reduction, high weight reduction rate, high treatment speed, complete harmlessness, energy recycling and the like, is one of effective and practical technologies for treating sludge, and can generate polluted flue gas in the combustion process. Therefore, the combustion treatment of the sludge and the retreatment of the flue gas are likely to become the main technical direction of the sludge treatment in the future.
At present, because the sludge drying-burning engineering of most thermal power plant's operation all belongs to the transformation engineering, original boiler is only furnished with the burning powder process system according to the characteristic of design coal type usually, can not directly accept the mud of high moisture content, therefore supplyes and arrange the sludge drying workshop and carry out sludge drying, but drying workshop and burning powder process system are relatively independent, and the distance is far away, and the operation and maintenance is with high costs, and the mud after the drying is transported to the dedicated mud storage storehouse of power plant, then carries out the burning processing in the burning powder process system, complex operation.
Disclosure of Invention
Aiming at the problems, the invention provides the sludge mixed combustion system of the thermal power plant, which makes full use of the existing boiler equipment of the thermal power plant to mix and combust the sludge, integrates the drying and combustion of the sludge, has reasonable design, simple operation and compact structure, reduces the operation and maintenance cost and is more practical.
The technical scheme adopted by the invention is as follows: the invention provides a sludge blending combustion system of a thermal power plant, which comprises a feeding device, a drying pipe, a fan coal mill and a boiler, wherein the feeding device, the boiler and the fan coal mill are all connected with the drying pipe, the fan coal mill is connected with the boiler, the feeding device is used for supplying sludge to the drying pipe, the boiler is connected with the drying pipe through a high-temperature flue gas pipeline, the high-temperature flue gas pipeline is used for supplying part of high-temperature flue gas generated by the boiler to the drying pipe, the sludge is heated and dried in the drying pipe through the high-temperature flue gas, and the dried sludge is dried, ground and conveyed into the boiler through the fan coal mill for combustion.
In an embodiment of the present invention, the sludge co-combustion system of the thermal power plant further includes a separator, and the separator is disposed between the fan coal mill and the boiler and is configured to separate sludge powder ground by the fan coal mill.
In an embodiment of the present invention, the sludge co-combustion system of the thermal power plant further includes an air-powder mixer, and the air-powder mixer is disposed between the separator and the boiler, and is configured to send the sludge powder separated by the separator into the boiler.
In an embodiment of the present invention, the sludge co-combustion system of the thermal power plant further includes a denitration device, a desulfurization device, and an exhaust fume extractor, the denitration device is connected to the boiler, the denitration device, the desulfurization device, and the exhaust fume extractor are sequentially connected, the denitration device is configured to denitrate flue gas generated by the boiler, the desulfurization device is configured to desulfurize the flue gas, and the exhaust fume extractor is configured to discharge denitrated and desulfurized flue gas.
In an embodiment of the present invention, an air inducing device is disposed between the denitration device and the desulfurization device, and is used for sending the denitrated flue gas to the desulfurization device.
In an embodiment of the present invention, a sealing air duct is further disposed between the fan coal mill and the boiler, and is used for sealing the fan coal mill.
In an embodiment of the present invention, an inlet of the sludge powder on the boiler is a powder inlet, an outlet of the flue gas on the boiler is a flue gas outlet, a warm air pipeline is arranged between the powder inlet and the flue gas outlet, and a primary air fan is arranged on the warm air pipeline and used for drying and conveying the sludge powder into the boiler.
In an embodiment of the present invention, the feeding device includes a storage tank, an extruding mechanism, a filtering mechanism and a control valve, wherein a feeding port is disposed at an upper side of the storage tank, and the extruding mechanism is partially movably disposed in the storage tank to extrude the material in the storage tank; the side wall of the storage vat is of a double-layer jacket structure, the side wall of the storage vat is sequentially provided with a first jacket and a second jacket from outside to inside, the water outlet is positioned on the first jacket, the second jacket comprises a first fixing net, a second fixing net and a filter screen, the filter screen is arranged between the first fixing net and the second fixing net to form the filtering mechanism, the filtering mechanism is used for filtering and dewatering materials in the storage vat, and water obtained by filtering is discharged through the water outlet; the lower side of the storage cylinder is provided with a discharge hole, and the control valve is arranged at the discharge hole and used for opening or closing the discharge hole.
In an embodiment of the present invention, the number of the feeding devices is two.
The invention has the beneficial effects that: the sludge mixed combustion system of the thermal power plant comprises a feeding device, a drying pipe, a fan coal mill and a boiler, the existing boiler equipment of the thermal power plant is used for mixed combustion of sludge, high-temperature flue gas generated by boiler combustion is used for drying wet sludge in the drying pipe, heat resources are fully utilized, energy is saved, the system integrates drying and combustion of sludge, drying and combustion of sludge can be simultaneously completed, long-distance transfer is not needed, the flow is short, equipment is few, the structure is compact, operation is simple, operation and maintenance cost is reduced, and the system is practical. During the use, feeder sends wet mud to in the drying tube, produces a large amount of high temperature flue gas during boiler burning simultaneously, and part high temperature flue gas sends to in the drying tube, and wet mud in the drying tube is through high temperature flue gas heating and drying, and the mud after the drying passes through the fan coal pulverizer drying, grinds and carries to burn in the boiler.
Drawings
FIG. 1 is a schematic structural diagram of a sludge co-combustion system of a thermal power plant according to the present invention;
FIG. 2 is a schematic view of the feed device of the present invention;
FIG. 3 is a cross-sectional view of the accumulator of the present invention.
The figures are numbered: 1. a feeding device; 2. a drying tube; 3. a fan coal mill; 4. a boiler; 5. a separator; 6. an air-powder mixer; 7. a denitration device; 8. a desulfurization unit; 9. a smoke exhauster; 10. an air inducing device; 21. a high temperature flue gas duct; 31. sealing the air duct; 41. a powder inlet; 42. a smoke outlet; 43. a warm air duct; 44. a primary air fan; 11. a storage tank; 12. an extrusion mechanism; 13. a filtering mechanism; 14. a control valve; 15. a flushing mechanism; 16. a water collecting mechanism; 17. a mesh screen; 111. a feed inlet; 112. a water outlet; 113. a discharge port; 114. a first jacket; 121. a controller; 122. a connecting member; 123. an extrusion; 131. a second jacket; 132. and (4) a filter screen.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.
Referring to fig. 1, the present invention provides a sludge blending combustion system of a thermal power plant, including a feeding device 1, a drying pipe 2, a fan coal mill 3 and a boiler 4, wherein the feeding device, the boiler 4 and the fan coal mill 3 are all connected to the drying pipe 2, the fan coal mill 3 is connected to the boiler 4, the feeding device 1 is configured to supply sludge to the drying pipe 2, the boiler 4 is connected to the drying pipe 2 through a high temperature flue gas pipeline 21, the high temperature flue gas pipeline 21 is configured to supply part of high temperature flue gas generated by the boiler 4 to the drying pipe 2, the sludge is heated and dried in the drying pipe 2 through the high temperature flue gas, and the dried sludge is dried, ground and conveyed to the boiler 4 through the fan coal mill 3 for combustion. This application utilizes existing 4 equipment of boiler in thermal power factory to mix the fever to mud, and the high temperature flue gas that produces through 4 burning of boiler carries out the drying to the wet mud in the drying tube 2, make full use of heat resource, and is comparatively energy-conserving, and this system collects the drying and the burning of mud in an organic whole, can accomplish the drying and the burning of mud simultaneously, need not carry out long distance transportation, and the flow is short, and equipment is few, compact structure, and easy operation has reduced fortune dimension cost, and is comparatively practical. During the use, feeder 1 sends wet mud to drying tube 2 in, produces a large amount of high temperature flue gas when boiler 4 burns simultaneously, and in partial high temperature flue gas sent to drying tube 2, wet mud in the drying tube 2 was through high temperature flue gas heating and drying, and the mud after the drying passes through fan coal pulverizer 3 drying, grinds and carries to the burning in boiler 4.
The sludge blending combustion system of the thermal power plant further comprises a separator 5, wherein the separator 5 is arranged between the fan coal mill 3 and the boiler 4 and used for separating sludge powder ground by the fan coal mill 3. The separator 5 sends the sludge powder with qualified fineness to the boiler 4 for combustion, and the sludge powder with unqualified fineness returns to the fan coal mill 3 for continuous grinding, so that the sludge with overlarge particles can be prevented from blocking a pipeline, and the sludge powder in the boiler 4 can be fully combusted.
The sludge co-combustion system of the thermal power plant further comprises an air-powder mixer 6, wherein the air-powder mixer 6 is arranged between the separator 5 and the boiler 4 and is used for conveying sludge powder separated by the separator 5 into the boiler 4. The operation of the boiler 4 not only requires a certain amount of pulverized coal to be supplied to the pulverized coal equipment, but also requires good adjusting performance and high continuity and uniformity. The continuity of powder feeding guarantees the safe operation of the powder making equipment and the boiler 4, and the uniformity of powder feeding guarantees the stable operation of the powder making equipment and the stable combustion of the boiler 4. The air-powder mixer 6 plays a throat function in the combustion of the boiler 4, and can continuously and uniformly feed powder, thereby ensuring the safe, economical and stable operation of the boiler 4.
The sludge blending combustion system of the thermal power plant further comprises a denitration device 7, a desulfurization device 8 and an exhaust smoke device 9, wherein the denitration device 7 is connected with the boiler 4, the denitration device 7, the desulfurization device 8 and the exhaust smoke device 9 are sequentially connected, the denitration device 7 is used for denitration of smoke generated by the boiler 4, the desulfurization device 8 is used for desulfurization of the smoke, and the exhaust smoke device 9 is used for discharging the smoke after denitration and desulfurization. The flue gas generated by the combustion of the boiler 4 contains a large amount of nitrogen oxides and sulfur oxides, which are one of the main sources of air pollution, and the nitrogen oxides and the sulfur oxides are subjected to harmless treatment by the denitration device 7 and the desulfurization device 8 and then discharged, so that the emission standard of environmental protection is met. Denitration device 7 sets up in the afterbody of boiler 4, and the temperature of 4 afterbody of boiler is higher, helps going on of denitration reaction.
An induced draft device 10 is arranged between the denitration device 7 and the desulfurization device 8 and used for conveying the denitrated flue gas to the desulfurization device 8. The structure in the boiler 4 is complicated, and the flue gas resistance is great, and the induced draft device 10 can follow the flue gas after the absorption burning in the boiler 4, helps the boiler 4 exhaust flue gas to carry to desulphurization unit 8 in, cause the negative pressure in the furnace of boiler 4 simultaneously, help the burning of boiler 4.
Still be equipped with sealed wind channel 31 between fan coal pulverizer 3 and the boiler 4 for fan coal pulverizer 3's is sealed, can prevent that the mud powder from getting into fan coal pulverizer 3, guarantees fan coal pulverizer 3's operation and life.
The entry of the last mud powder of boiler 4 is for advancing powder mouth 41, and the export of flue gas is outlet port 42 on the boiler 4, advances to be equipped with warm air pipeline 43 between powder mouth 41 and the outlet port 42, is equipped with primary air fan 44 on the warm air pipeline 43, and primary air fan 44 is used for the drying and carries the mud powder to the boiler 4 in, and can adjust the temperature of the powder mouth 41 of advancing of boiler 4 and outlet port 42, prevents that furnace slagging scorification.
The feeding device 1 is connected with the drying pipe 2 through a conveyor belt, and the sludge conveying mode is simple. The boiler 4 is also provided with an ignition source, boiling combustion equipment and other equipment which are needed for assisting in completing sludge combustion.
Referring to fig. 2 and 3, the feeding device 1 includes an accumulator 11, an extruding mechanism 12, a filtering mechanism 13 and a control valve 14, wherein the upper side of the accumulator 11 is provided with a feeding port 111, and a part of the extruding mechanism 12 is movably disposed in the accumulator 11 to extrude the material in the accumulator 11; the storage vat 11 is provided with a water outlet 112, the filtering mechanism 13 is arranged in the storage vat 11 to filter and remove water from the materials in the storage vat 11, and the water obtained by filtering is discharged through the water outlet 112; the lower side of the storage cylinder 11 is provided with a discharge port 113, and the control valve 14 is arranged at the discharge port 113 and is used for opening or closing the discharge port 113. The feeding device 1 of this application, reasonable in design, compact structure collects predrying and feed in an organic whole, is applicable to the thin material that the moisture content height stickness is big such as processing mud, constantly extrudees the material through extrusion mechanism 12 for the material all receives the effect of extrusion power when carrying out predrying and feed, can effectively prevent to take place the problem of putty, and then guarantees that equipment operation is stable. During the use, close control flap 14 earlier, make discharge gate 113 close, in sending the material into storage vat 11 from feed inlet 111, the great material of water content filters the dewatering through filtering mechanism 13, and simultaneously, extrude the material through extrusion mechanism 12, make the water of material normal water constantly extruded out, guarantee the dewatering effect of material, the water that the filtration obtained passes through delivery port 112 and discharges, accomplish the predrying operation, then open control flap 14, make discharge gate 113 open, extrusion mechanism 12 continues the extrusion material, the material is extruded from discharge gate 113, accomplish the feeding operation.
The side wall of the storage vat 11 is of a double-layer jacket structure, and is sequentially provided with a first jacket 114 and a second jacket 131 from outside to inside, the second jacket 131 comprises a first fixing net, a second fixing net and a filter screen 132, and the filter screen 132 is arranged between the first fixing net and the second fixing net to form a filter mechanism 13; the water outlet 112 is located on the first jacket 114. The wet material in the storage tank 11 is continuously extruded by the extruding mechanism 12, the solid matter in the wet material is limited in the second jacket 131 by the filter screen 132, and the water in the wet material passes through the filter screen 132 of the second jacket 131, is extruded into the gap between the first jacket 114 and the second jacket 131, and is discharged through the water outlet 112, so as to achieve the purpose of pre-drying. The mesh size of the filter 132 can be selected according to the particle size of the solid matter in the wet material. The two sides of the filter screen 132 are fixed by the first fixing net and the second fixing net respectively, so that the filter mechanism 13 has certain enough strength, and the filter mechanism 13 is prevented from being damaged by the extruding mechanism 12. And the first fixing net and the second fixing net are both net-shaped structures, which does not affect the filtering performance of the filter net 132.
The feeding device 1 further comprises a flushing mechanism 15, wherein the flushing mechanism 15 is arranged on the inner wall of the first jacket 114 and is used for flushing the filtering mechanism 13 so as to prevent the filtering holes of the filtering mechanism 13 from being blocked by materials. When the feeding of the feeding device 1 is finished and no material is left in the storage cylinder 11, the flushing mechanism 15 is opened, and the filtering mechanism 13 is flushed. The flushing mechanism 15 can be a plurality of flushing nozzles arranged on the inner wall of the first jacket 114, the flushing nozzles are arranged opposite to the filtering mechanism 13, and the flushing angle of the flushing nozzles can be adjusted so as to better clean the filtering mechanism 13, thereby ensuring the filtering effect of the filtering mechanism 13.
The first fixing net and the second fixing net are both steel nets. The steel mesh is light in weight and high in strength, is convenient to install, and can ensure the structural strength of the filtering mechanism 13; the steel mesh has good plasticity, and cannot be suddenly broken and damaged due to accidental overload or local overload; the steel mesh has good toughness and strong adaptability to dynamic load. Preferably, the first fixing net and the second fixing net are both made of stainless steel materials, have good corrosion resistance and can adapt to the characteristics of high water content and complex property of wet sludge.
Pressing mechanism 12 includes a controller 121, a connecting member 122, and a pressing member 123, connecting member 122 connecting controller 121 and pressing member 123 such that controller 121 controls pressing member 123 to press material in accumulator 11. The controller 121 drives the extrusion piece 123 to extrude the materials through the connecting piece 122, the structure is simple, and the water yield and the discharge amount of the materials can be adjusted through adjustment of the extrusion force.
The open feed inlet 111 that forms of the upside of storage vat 11, extruded piece 123 can stretch into storage vat 11 through feed inlet 111 in, extrude the material. The open feed port 111 facilitates feeding. In one embodiment, the controller 121 is disposed outside the extrusion cylinder, the controller 121 controls the extrusion member 123 to ascend or descend through the connecting member 122, the material is extruded through the gravity of the extrusion member 123, and the extrusion member 123 is matched with the second jacket 131, so that the material in the second jacket 131 can be extruded better. During feeding, the controller 121 controls the extrusion piece 123 to rise, and after the material is fed from the feeding hole 111, the controller 121 controls the extrusion piece 123 to descend, so that the extruded material is filtered to obtain water and discharged. But not limited thereto, the controller 121 may also achieve the purpose of extruding the material by applying a force to the extrusion member 123, and the present invention is not limited thereto.
The controller 121 can be an electric motor or a hydraulic pump, and the control mode is simple and reliable.
The feeding device 1 further comprises a water collecting mechanism 16, wherein the water collecting mechanism 16 is connected with the water outlet 112 and is used for collecting water filtered by the filtering mechanism 13. Collect the water that the filtration was got, can provide the water for if other processes such as washing mechanism 15 on the one hand, make full use of water resource, on the other hand because the water that the mud filtration obtained, the nature is comparatively complicated, and pollutant content is high to concentrate and carry out innocent treatment, comparatively environmental protection.
The discharge port 113 is provided with a mesh 17. The material is easy to agglomerate after being extruded, and the sieve mesh 17 is arranged at the discharge port 113, so that the extruded material can be well dispersed, and the subsequent drying and combustion can be conveniently carried out.
The number of the feeding devices 1 is two. The two feeding devices 1 are used one by one, when one of the feeding devices fails, the other feeding device can feed materials normally, continuous feeding is achieved, subsequent processes cannot be incapable of running due to the failure of the feeding devices 1, and when the supply quantity demand of materials in the processes is large, the two feeding devices 1 can run simultaneously. However, the number of the feeding devices 1 may be set according to specific conditions, and the invention is not limited thereto.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.
Claims (9)
1. The sludge blending combustion system of the thermal power plant is characterized by comprising a feeding device, a drying pipe, a fan coal mill and a boiler, wherein the feeding device, the boiler and the fan coal mill are all connected with the drying pipe, the fan coal mill is connected with the boiler, the feeding device is used for supplying sludge to the drying pipe, the boiler is connected with the drying pipe through a high-temperature flue gas pipeline, the high-temperature flue gas pipeline is used for supplying part of high-temperature flue gas generated by the boiler to the drying pipe, the sludge is heated and dried in the drying pipe through the high-temperature flue gas, and the dried sludge is dried, ground and conveyed into the boiler through the fan coal mill for combustion.
2. The thermal power plant sludge co-combustion system of claim 1, further comprising a separator disposed between the fan mill and the boiler for separating sludge powder ground by the fan mill.
3. The thermal power plant sludge co-combustion system according to claim 2, further comprising an air-powder mixer, disposed between the separator and the boiler, for feeding the sludge powder separated by the separator into the boiler.
4. The sludge co-combustion system of the thermal power plant as claimed in claim 1, further comprising a denitration device, a desulfurization device and an extractor, wherein the denitration device is connected with the boiler, the denitration device and the desulfurization device are sequentially connected with the extractor, the denitration device is used for denitration of flue gas generated by the boiler, the desulfurization device is used for desulfurization of flue gas, and the extractor is used for discharging the denitrated and desulfurized flue gas.
5. The sludge co-combustion system of the thermal power plant as set forth in claim 4, wherein an air inducing device is provided between the denitration device and the desulfurization device for sending the denitrated flue gas to the desulfurization device.
6. The thermal power plant sludge co-combustion system of claim 1, wherein a sealing air duct is further arranged between the fan coal mill and the boiler for sealing the fan coal mill.
7. The sludge co-combustion system of the thermal power plant as claimed in claim 1, wherein the inlet of the sludge powder on the boiler is a powder inlet, the outlet of the flue gas on the boiler is a flue gas outlet, a warm air pipeline is arranged between the powder inlet and the flue gas outlet, and a primary air fan is arranged on the warm air pipeline and used for drying and conveying the sludge powder into the boiler.
8. The sludge co-combustion system of a thermal power plant as claimed in claim 1, wherein the feeding device comprises an storage tank, an extruding mechanism, a filtering mechanism and a control valve, the upper side of the storage tank is provided with a feeding port, and the extruding mechanism is partially movably arranged in the storage tank to extrude the material in the storage tank; the side wall of the storage vat is of a double-layer jacket structure, the side wall of the storage vat is sequentially provided with a first jacket and a second jacket from outside to inside, the water outlet is positioned on the first jacket, the second jacket comprises a first fixing net, a second fixing net and a filter screen, the filter screen is arranged between the first fixing net and the second fixing net to form the filtering mechanism, the filtering mechanism is used for filtering and dewatering materials in the storage vat, and water obtained by filtering is discharged through the water outlet; the lower side of the storage cylinder is provided with a discharge hole, and the control valve is arranged at the discharge hole and used for opening or closing the discharge hole.
9. The thermal power plant sludge co-combustion system as set forth in claim 8, wherein the number of the feeding devices is two.
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