CN103322580B - Water-cooling dry-type slag discharge device of pulverized coal boiler - Google Patents
Water-cooling dry-type slag discharge device of pulverized coal boiler Download PDFInfo
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- CN103322580B CN103322580B CN201310278631.5A CN201310278631A CN103322580B CN 103322580 B CN103322580 B CN 103322580B CN 201310278631 A CN201310278631 A CN 201310278631A CN 103322580 B CN103322580 B CN 103322580B
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Abstract
The invention provides a water-cooling dry-type slag discharge device of a pulverized coal boiler. The water-cooling dry-type slag discharge device comprises a drum slag cooler and a slag conveyor, a slag crushing device is arranged between a boiler slag well and the drum slag cooler, an outlet of the slag crushing device is communicated with a feed port of the drum slag cooler, a discharge port of the drum slag cooler is communicated with the slag conveyor, the slag crushing device is a high-temperature double-roll slag crusher which comprises two rotary rolls driven to rotate oppositely by a transmission mechanism a plurality of slag crushing teeth are distributed on the surface of each rotary roll along the axial direction of the rotary roll, the rotary rolls are arranged in a water jacket case, and auxiliary slag crushing teeth corresponding to the slag crushing teeth on the surfaces of the rotary rolls are distributed on the inner wall face of the water jacket case. A cooling chamber for supplying cooling water is formed in each of the rotary rolls and the water jacket case to cool parts in contact with slag blocks. The water-cooling dry-type slag discharge device of the pulverized coal boiler can crush coal slag to the required size and store the crushed slag as well as achieve heat recycling.
Description
Technical field
The present invention relates to the boiler slag removal device that the industrial circles such as the energy, metallurgy, petrochemical industry take fine coal as fuel, particularly a kind of pulverized-coal fired boiler water-cooled dry slag-draining device.
Background technology
The industrial circles such as current China energy, metallurgy, petrochemical industry take fine coal as the dreg removing system that the steam generator system of fuel uses, substantially in the majority with wet type deslagging.Ye You minority enterprise uses wire mesh conveyor belt and supporting scraper plate jointly to use, and cooling source adopts air-cooled Dry Slag Removal System.Although two kinds of cold slags can cool deslagging temperature, the disadvantage existed is a lot of, and it is excessive that two kinds of cold slag systems of form all exist capital expenditure, wastes the major defect that recyclable resource, serious environment pollution, floor space are excessive in a large number.Also there are the serious problems such as waste water treatmentntrol difficult, water consumption is large, the disposable input of capital constructive fund is excessive in wet type deslagging.
Application number be 201220383646.9 utility model patent disclose a kind of dried slag removing waste-heat recovery device of coal-powder boiler, this device comprises coal-powder boiler, furnace hopper, slag charge monitor, level-sensing device, tremie pipe, push-pull valve, lag cooler, furnace hopper is arranged on the bottom of Pulverized Fuel Boiler Furnace, is connected with burner hearth by expansion joint, double-edged fine-toothed comb is arranged at the bottom of furnace hopper, hydraulic pressure plate breaker is arranged at double-edged fine-toothed comb top, and hopper is arranged at double-edged fine-toothed comb bottom, and hopper is connected with lag cooler by tremie pipe.This device, by hydraulic cylinder band hydrodynamic pressure plate breaker, extrudes slag by the extrusion head of indentation, makes slag broken, and uses lag cooler to cool lime-ash, to realize dried slag removing.Extruding break cannot meet the uniform requirement of discharging-material size, and when bulk lime-ash drops, breaker is disposed and easily caused double-edged fine-toothed comb to be impacted not in time and damaged.
Summary of the invention
For solving prior art Problems existing, the invention provides a kind of pulverized-coal fired boiler water-cooled dry slag-draining device, substantially eliminating environmental pollution, save floor occupying area, energy-saving and emission-reduction, the available heat circulation of recovery use, solving the disadvantage that original deslagging mode exists.
Pulverized-coal fired boiler water-cooled dry slag-draining device provided by the invention, comprise barrel slag cooler and defeated slag device, slag charge breaker is set between boiler slag well and described barrel slag cooler, the described outlet of slag charge breaker is communicated with the charging aperture of barrel slag cooler, the discharging opening of described barrel slag cooler is communicated with described defeated slag device, described slag charge breaker is the two roller slag breaker of high temperature, the two roller slag breaker of this high temperature comprises two are driven opposite direction rotating transfer roller by transmission mechanism, roll surface axially lays some disintegrating slag teeth along transfer roller, described transfer roller is arranged in a water jacket cabinet, the disintegrating slag tooth internal face of described water jacket cabinet corresponding to roll surface is laid with auxiliary disintegrating slag tooth, transfer roller and water jacket cabinet are provided with the cooling chamber of Cooling Water, cool the parts of contact clinker.
Further, described water jacket cabinet arranges described cooling chamber along its four peripheral wall surfaces, described cooling chamber and inlet header water tank with export header tank and be communicated with; The cooling chamber of described transfer roller is that hollow shaft form is arranged, and arranges swivel joint implement cooling for, draining near described transfer roller end,
During for preventing from running in the state of accident, produce the bulk coke button that scabs and fall and impact destruction to the two roller slag breaker of high temperature, arrange broken cone in the junction of the two roller slag breaker of boiler slag well and high temperature, the pointed portion that this fragmentation is bored upward.
Two transfer rollers of the two roller slag breaker of described high temperature are respectively initiatively transfer roller and passive transfer roller, and wherein, initiatively transfer roller directly transmits rotary power by the driving shaft of transmission mechanism, and initiatively power transmission is given passive transfer roller by gear train by transfer roller simultaneously.This kind of kind of drive can not change the normal meshing relation in transmission mechanism between each travelling gear because transfer roller centre-to-centre spacing changes, and fully ensures that two transfer rollers do synchronous opposite direction rotating all the time.
For making the particle size after cracking of cinder correspond to actual needs, the tooth front space of described disintegrating slag tooth is 1.3 times of maximum slag charge discharging-material size; Along described transfer roller radial direction, the spacing of adjacent disintegrating slag tooth is 1.1-1.4 times of maximum slag charge discharging-material size, and the tooth top arc length of adjacent disintegrating slag tooth is 1.9-2.3 times of maximum slag charge discharging-material size.
Further, along the axial direction of described transfer roller, the spacing of adjacent disintegrating slag tooth is the 2/3-3/4 of maximum slag charge discharging-material size.
Further, the diameter of described transfer roller is 2.5-4.5 times of maximum slag charge discharging-material size.
Transformation at present pulverized-coal fired boiler dreg removing system, generally, elevation is all difficult to the size reaching apparatus arrangement, can according to the real space at scene, adopt water-cooling spiral lag cooler as the pipeline promoting lime-ash elevation, enter pre-cooled section before barrel slag cooler and changeover portion as lime-ash.That is, described high temperature is two is provided with water-cooling spiral lag cooler between roller slag breaker and described barrel slag cooler, and namely the outlet of the two roller slag breaker of described high temperature is connected with described water-cooling spiral lag cooler, and the outlet of described water-cooling spiral lag cooler is connected with described barrel slag cooler.
Pulverized-coal fired boiler water-cooled dry slag-draining device provided by the present invention has the following advantages: after (1) pulverized-coal fired boiler water-cooled provided by the present invention dry slag-draining device adopts water-cooled dried slag removing, save a large amount of land occupation areas, significantly reduce construction funds invested.(2) eliminate buck settling tank, eliminate the pathogeny of strong wind sand, effectively prevent dust from flying contaminated environment, have positive role to the particle reduced in air.(3) eliminate washing slag water, substantially reduce the discharge capacity of sewage in boiler operatiopn, reduce the pressure of effluent from boiler process, strong ensure that the safety of water source.(4) pulverized-coal fired boiler water-cooled dry slag-draining device provided by the present invention employs barrel slag cooler, water-cooling spiral lag cooler, heat exchange mode is solid phase and liquid phase indirect heat exchange, obtain Lowlevel thermal energy, can, as the soft water pre-heating device entering stokehold, heat energy 757MJ can be utilized to calculate by ton slag, be equivalent to reduce mark coal 25.8Kg, equal to reduce discharging CO2-67.6Kg, SO2-0.22Kg, oxynitrides-0.19Kg, have the positive role of energy-saving and emission-reduction.(5) adopt closed conveying mode, prevent dust from flying contaminated environment, improve deslagging post labour health condition, alleviate field worker labour intensity.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention one structural representation;
Fig. 2 is the two roller slag breaker A-A direction view of high temperature of the present invention;
Fig. 3 is I place enlarged drawing in Fig. 2;
Fig. 4 is that dregs breaking tooth of the present invention is at transfer roller axial distribution schematic diagram;
Fig. 5 is the embodiment of the present invention two structural representation.
In figure: 1-fragmentation cone; The two roller slag breaker of 2-high temperature; 3-barrel slag cooler; The defeated slag device of 4-; 5-slag storehouse; 6-slag well; 7-water-cooling spiral lag cooler; 2.1-is transfer roller initiatively; 2.2-water jacket cabinet; 2.3-cooling chamber; 2.4-transmission mechanism; 2.5-gear train; 2.6-disintegrating slag tooth; 2.7-assists disintegrating slag tooth; The passive transfer roller of 2.8-.
Detailed description of the invention
Embodiment one:
As shown in Figure 1, 2, pulverized-coal fired boiler water-cooled dry slag-draining device provided by the present invention, comprises barrel slag cooler 3, defeated slag device 4.Defeated slag device can be made up of high angle belt conveyer or bucket chain conveyor.Slag charge breaker is set between boiler slag well 6 and barrel slag cooler 3, the slag charge breaker that the present embodiment provides is the two roller slag breaker 2 of high temperature, the outlet of the two roller slag breaker 2 of high temperature is communicated with the charging aperture of barrel slag cooler 3, and the discharging opening of barrel slag cooler 3 is communicated with defeated slag device 4.The two roller slag breaker of high temperature comprises two are driven opposite direction rotating transfer roller (2.1,2,8) by transmission mechanism 2.4, and roll surface axially lays some dregs breaking tooths 2.6 along transfer roller.Transfer roller (2.1,2.8) is arranged in water jacket cabinet 2.2, and the dregs breaking tooth 2.6 internal face of water jacket cabinet corresponding to transfer roller 2.1 surface is laid with auxiliary dregs breaking tooth 2.7.Transfer roller (2.1,2.8) and water jacket cabinet 2.2 are provided with the cooling chamber 2.3 of Cooling Water, and for cooling the parts of contact clinker, cooled by continuous water flowing, the temperature rise ensureing crusher members in allowed limits, guarantees to have good intensity all the time.
Two transfer rollers of the two roller slag breaker 2 of high temperature are respectively initiatively transfer roller 2.1 and passive transfer roller 2.8, wherein, initiatively transfer roller 2.1 directly transmits rotary power by the driving shaft of transmission mechanism, and initiatively power transmission is given passive transfer roller 2.8 by gear train 2.5 by transfer roller 2.1 simultaneously.
The cooling chamber of water jacket cabinet 2.2 can be arranged along its four peripheral wall surfaces, described cooling chamber and inlet header water tank with export header tank and be communicated with; The cooling chamber of described transfer roller (2.1,2.8) is that hollow shaft form is arranged, and arranges swivel joint implement cooling for, draining near described transfer roller end.
During for effectively preventing from running in the state of accident, producing the bulk coke button that scabs and falling and impact destruction to the two roller slag breaker of high temperature, arrange in the junction of the two roller slag breaker 2 of boiler slag well 6 and high temperature and brokenly bore 1, its pointed portion upward.Broken cone 1 is made up of special alloy steel that is high temperature resistant, rub resistance, and shape conically or triangle.
As shown in Figure 2,3, 4, for making the particle size after cracking of cinder correspond to actual needs, the tooth front space L of dregs breaking tooth is 1.3 times of maximum slag charge discharging-material size; Transfer roller radial direction, the space D of adjacent dregs breaking tooth is 1.1-1.4 times of maximum slag charge discharging-material size; Transfer roller radial direction, the tooth top arc length H of adjacent dregs breaking tooth is 1.9-2.3 times of maximum slag charge discharging-material size.Along transfer roller axial direction, the spacing W of adjacent dregs breaking tooth is the 2/3-3/4 of maximum slag charge discharging-material size.In pulverized-coal fired boiler tapping process, usually cinder will be broken into the disintegrating slag of < 50mm, namely maximum slag charge discharging-material size diameter is 50mm.So in maximum slag charge discharging-material size 50mm situation, tooth front space L is 65mm; Along transfer roller radial direction, the space D of adjacent dregs breaking tooth is 55-70mm, and the tooth top arc length H of adjacent dregs breaking tooth is 95-115mm; Along transfer roller axial direction, the spacing W of adjacent dregs breaking tooth is 33-37mm.Doubly, this scope, can obtain comparatively ideal crushing effect to the 2.5-4.5 typically having a diameter from maximum slag charge discharging-material size of transfer roller.
Embodiment two:
As shown in Figure 5, to pulverized-coal fired boiler transform time, need the real space determination modification scheme according to scene.When height dimension is not enough, can adopts and increase a water-cooling spiral lag cooler 7 between roller slag breaker 2 and barrel slag cooler 3 and improve the elevation cooling lime-ash high temperature is two, carry out relay cooling.
By pulverized-coal fired boiler water-cooled dry slag-draining device provided by the present invention, lime-ash can be broken into the disintegrating slag of < 50mm, and utilize boiler feedwater indirectly to be cooled by warm sludge, reclaim heat to recycle, ash temperature is down to≤100 DEG C, be beneficial to use inclined angle belt or bucket chain conveyor to be delivered to slag warehousing and deposit.The Lowlevel thermal energy that wet type Quench is lost is reclaimed, effectively avoids a large amount of waste water resource and produce sewage, meeting the state basic policy of energy-saving and emission-reduction.This device has the effect of high-performance heat exchanger, and heat exchange mode is the indirect heat exchange of solid phase and liquid phase, and heat exchange area equilibrium, characteristics of compact layout, heat exchange efficiency are high.The continuity of defeated slag, can with the change of boiler load and coal and at any time long-range or Field adjustment.Lime-ash adopts closed conveying mode, prevents dust from flying contaminated environment, improves deslagging post labour health condition, have the positive role of energy-saving and emission-reduction.Slag-draining device adopts the manufacture of antiwear heat resisting alloy steel material, and the oxidation effectively can offsetting high-temperature ash is washed away and weares and teares, the service life of extension fixture.This plant running is steady, maintenance is few and convenient and easy, long service life, can meet the requirement of matched with devices, meanwhile, also has to the industry such as petrochemical industry, metallurgy of other solid shape material cooling the value promoted the use of.
Claims (8)
1. a pulverized-coal fired boiler water-cooled dry slag-draining device, comprise barrel slag cooler and defeated slag device, slag charge breaker is set between boiler slag well and described barrel slag cooler, the described outlet of slag charge breaker is communicated with the charging aperture of barrel slag cooler, the discharging opening of described barrel slag cooler is communicated with described defeated slag device, it is characterized in that: described slag charge breaker is the two roller slag breaker of high temperature, the two roller slag breaker of this high temperature comprises two are driven opposite direction rotating transfer roller by transmission mechanism, roll surface axially lays some disintegrating slag teeth along transfer roller, described transfer roller is arranged in a water jacket cabinet, the disintegrating slag tooth internal face of described water jacket cabinet corresponding to roll surface is laid with auxiliary disintegrating slag tooth, transfer roller and water jacket cabinet are provided with the cooling chamber of Cooling Water, cool the parts of contact clinker.
2. pulverized-coal fired boiler water-cooled dry slag-draining device as claimed in claim 1, is characterized in that: described water jacket cabinet arranges described cooling chamber along its four peripheral wall surfaces, described cooling chamber and inlet header water tank with export header tank and be communicated with; The cooling chamber of described transfer roller is that hollow shaft form is arranged, and arranges swivel joint implement cooling for, draining near described transfer roller end.
3. pulverized-coal fired boiler water-cooled dry slag-draining device as claimed in claim 1, is characterized in that: arrange broken cone in the junction of boiler slag well and the two roller slag breaker of high temperature, the pointed portion of this fragmentation cone upward.
4. pulverized-coal fired boiler water-cooled dry slag-draining device as claimed in claim 1, it is characterized in that: two transfer rollers of the two roller slag breaker of described high temperature are respectively initiatively transfer roller and passive transfer roller, wherein, initiatively transfer roller directly transmits rotary power by the driving shaft of transmission mechanism, and initiatively power transmission is given passive transfer roller by gear train by transfer roller simultaneously.
5. pulverized-coal fired boiler water-cooled dry slag-draining device as claimed in claim 1, is characterized in that: the tooth front space of described disintegrating slag tooth is 1.3 times of maximum slag charge discharging-material size; Along described transfer roller radial direction, the spacing of adjacent disintegrating slag tooth is 1.1-1.4 times of maximum slag charge discharging-material size, and the tooth top arc length of adjacent disintegrating slag tooth is 1.9-2.3 times of maximum slag charge discharging-material size.
6. pulverized-coal fired boiler water-cooled dry slag-draining device as claimed in claim 5, it is characterized in that: along the axial direction of described transfer roller, the spacing of adjacent disintegrating slag tooth is the 2/3-3/4 of maximum slag charge discharging-material size.
7. pulverized-coal fired boiler water-cooled dry slag-draining device as claimed in claim 1, is characterized in that: the diameter of described transfer roller is 2.5-4.5 times of maximum slag charge discharging-material size.
8. the pulverized-coal fired boiler water-cooled dry slag-draining device as described in claim 1-7 any one claim, it is characterized in that: described high temperature is two is provided with water-cooling spiral lag cooler between roller slag breaker and described barrel slag cooler, namely the outlet of the two roller slag breaker of described high temperature is connected with described water-cooling spiral lag cooler, and the outlet of described water-cooling spiral lag cooler is connected with described barrel slag cooler.
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| CN103615732B (en) * | 2013-11-26 | 2015-12-02 | 东南大学 | A kind of device strengthening the heat transfer of power station boiler dry slag discharge machine |
| CN103884017A (en) * | 2014-02-26 | 2014-06-25 | 青岛松灵电力环保设备有限公司 | Spiral conveying slag cooler |
| CN104165354B (en) * | 2014-06-09 | 2016-09-07 | 章云 | A kind of coal cinder burner |
| CN108731007B (en) * | 2018-06-28 | 2023-07-25 | 西安交通大学 | Boiler fire extinguishing device for preventing boiler from being burnt by ash bucket of power station boiler |
| CN110440269A (en) * | 2019-07-15 | 2019-11-12 | 南通九洲环保科技有限公司 | A kind of solid waste burning dry-type pulverizing slag-tapping system |
| CN113446612B (en) * | 2021-07-28 | 2022-10-14 | 中材节能股份有限公司 | Boiler slagging waste heat recovery device |
| CN115888892B (en) * | 2022-12-21 | 2023-08-15 | 山东鲁泰热电有限公司 | Dust-free slag crusher for thermal power plant |
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| US4463686A (en) * | 1982-10-05 | 1984-08-07 | L. & C. Steinmuller Gmbh | Apparatus for removal of ash and slag |
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Effective date of registration: 20170602 Address after: 214532, Jiangsu, Taizhou, Dongxing Town, Jingjiang Hui Feng head dam East Patentee after: Jiangsu Jinglong Alloy Steel Machinery Manufacturing Co., Ltd. Address before: 214500, Huimin road 28, Dongxing Town, Taizhou, Jiangsu, Jingjiang Patentee before: Chen Liang |
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