CN205746804U - The automatic ignition of brown coal system of processing and anti-coking injection burning furnace - Google Patents

Abstract

The automatic ignition of a kind of brown coal system of processing and anti-coking injection burning furnace, including body of heater, maintenance fire door, smoke exhaust barrel, is characterized in that body of heater bottom layer bottom has natural air inlet mouth, have fuel mouth blown and bocca at 1.5 meters, bottom；And three layers of wind-supplying mouth are set, each wind-supplying mouth is all arranged along inwall tangential direction, and smoke exhaust barrel top, equipped with electric gate valve, connects hot air duct bottom smoke exhaust barrel, hot air duct exports equipped with electric gate valve and temperature detection sensor, and the top of body of heater arranges temperature detection sensor.This utility model can realize automatic ignition, and without coking；Energy long time continuous working, can achieve temperature automatic adjustment, can meet the process matched therewith requirement of brown coal system of processing.

Description

The automatic ignition of brown coal system of processing and anti-coking injection burning furnace

Technical field

This utility model belongs to a kind of coal drying plant, the automatic ignition of a kind of brown coal system of processing and anti-caking Burnt injection burning furnace.

Background technology

Brown coal are the main fuels in current thermal power plant, and due to raw coal moisture content higher (reaching more than 40%), and lumpiness is not Deng, in order to give full play to exerting oneself of electromotor, it is necessary to brown coal are pulverized, dries and make its granularity reach less than 5 millimeters, aqueous Less than 15%.At present, it is first to pulverize with pulverizer to be dried machine drying more mostly, dries and generally use roller drier.Existing Technology has the drawback that: complex process, floor space are big, cost is high, operating cost is high.As used with brown coal powder as fuel Air stove air feed carries out drying the deficiency that can overcome above-mentioned technology, and such as fluidized bed furnace, i.e. cartridge type bottom of furnace body is equipped with some ventilators. Wind is blown into from bottom blast cap side opening, and fuel coal dust puts into from furnace roof portion, burns in stove, and drying machine is supplied by the flue gas of generation Heat.But

The shortcoming of fluidized bed furnace: be first ignition difficulties, needs separately to add the material that ignites and is heated to brown coal burning-point and just can ignite.Especially It is that work is shut down suddenly, again ignites more difficult.Next to that in brown coal combustion process, when ignition temperature exceedes ash fusing point Time, ash is divided into glutinous slurry, and in bulk after cooling, once ventilator is blocked, and clears up the most difficult.

The purpose of this utility model is to provide automatic ignition and the anti-coking injection burning furnace of a kind of brown coal system of processing, it is achieved from Move igniting and without coking.Can long time continuous working, and achieve temperature automatic adjustment, the supporting of brown coal system of processing can be met Technological requirement.

Utility model content

The technical scheme that this utility model provides is: includes body of heater, maintenance fire door, smoke exhaust barrel, it is characterized in that: body of heater is circle Cartridge type, appearance is Plate Welding, and inner lining refractory block arranges the adiabator layer made firm by ramming between refractory brick and outer steel plate, body of heater is from upper Assembled by three cylindrical portions under to and constitute；Bottom layer bottom has natural air inlet mouth, under air-introduced machine effect, can inspiration combustion-supporting Wind；At 1.5 meters, bottom, have fuel mouth blown, on same circumference and with its be at 90 ° installing put combustor；Blow at fuel On entrance upwards 150 millimeters, the cross section of downward 150 millimeters and downward 450 millimeters, in 180 ° of symmetric positions, arrange two respectively Wind-supplying mouth, each wind-supplying mouth is all arranged along inwall tangential direction, and each wind-supplying mouth even mends blower fan by air channel, is blown into natural wind；Smoke evacuation Cylinder top, equipped with electric gate valve, connects hot air duct bottom smoke exhaust barrel, hot air duct exports equipped with electric gate valve and temperature detection Sensor；The top of body of heater arranges temperature detection sensor.

Good effect of the present utility model: automatic ignition can be realized, and without coking；Energy long time continuous working, it is achieved Temperature automatic adjustment, can meet the process matched therewith requirement of brown coal system of processing.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is lower portion of furnace body structure enlarged diagram.

Fig. 3 is the A-A sectional view of Fig. 1.

Fig. 4 is the B-B sectional view of Fig. 1.

Fig. 5 is the C-C sectional view of Fig. 1.

Fig. 6 is air stove automatic ignition control flow chart.

Fig. 7 is the flow chart by fuzzy control instrument control fuel blower fan.

Fig. 8 is the control circuit schematic diagram of fuzzy control instrument control fuel blower fan.

Detailed description of the invention

Seeing Fig. 1-5, concrete structure is as follows: body of heater 4 is the cylinder type of outside diameter 3 meters, is divided into three layers, from top to bottom by Three cylindrical portions assemble and constitute, and with Flange joint, it is respectively 2 meters the most from bottom to up, 1.5 meters, 1.5 meters.Appearance is steel Plate welds, and inner lining refractory block arranges the adiabator layer made firm by ramming between refractory brick and outer steel plate；Furnace base is eight that channel-section steel is welded into Dihedral, body of heater 4 bottom layer bottom has eight natural air inlet mouth 4-1, under outside air-introduced machine (not shown) effect, can inspiration Combustion air；Having fuel mouth blown 2 at 1.5 meters, bottom, body of heater outer end fuel mouth blown connects cartridge and fuel blower fan is (outer Portion's equipment, not shown in figure), the most same circumference is the combustor bocca 4-3 arranging spray diesel oil at 90 ° with it；? It is respectively provided with in 180 ° symmetrical on fuel mouth blown 2 upwards 150 millimeters, each cross section of downward 150 millimeters and downward 450 millimeters Two wind-supplying mouths 3, each wind-supplying mouth 3 is all arranged along inwall tangential direction, and each wind-supplying mouth 3 is connected by air channel mends blower fan 1, is blown into certainly So wind.Chimney 7 top, equipped with electric gate valve 8, connects hot air duct 6 bottom smoke exhaust barrel 7, hot air duct 6 exports this mouthful of company of 6-1( Connect main drying hot air duct) equipped with electric gate valve 5 and temperature detection sensor T1-1；The top of body of heater arranges temperature detection and passes Sensor T1.The sidewall of body of heater bottom arranges maintenance fire door 4-2, and people can enter clearing furnace.

Operating process and operation principle (see figure 6): before blow-on, electric gate valve 8 is closed, electric gate valve 5 is crack, and wind-supplying mouth 3 closes Close.Outside drying machine main induced draft fan is opened, and natural wind naturally sucks from furnace bottom natural air inlet mouth 4-1, is formed as micro-in air stove Negative pressure.Combustor is lighted by bocca 4-3 flame in stove, opens fuel blower fan, is sprayed by brown coal powder by fuel mouth blown 2 Enter.Meet with the combustor column of flame in stove center, burn rapidly.Meanwhile, open electric gate valve 5 and mend blower fan 1.Natural wind Jointly acting on down with air inducing, make stove fire burn more prosperous and more prosperous, the column of flame tangentially rotates rising along furnace wall, until the whole after-flame of top fuel. Mending wind due to secondary is that in tangential direction is blown into.Form one layer of cold wind film in furnace wall with the column of flame, reach to prevent in furnace wall coking Purpose.

See Fig. 7-8, the air stove outlet temperature detection sensor T1-1 fuel by fuzzy control instrument control frequency control Blower fan (peripheral hardware, figure not shown in), control circuit uses available circuit structure.

Start before according to drying process requirement, export pathogenic wind-warm demarcate (less than lignite ash melting point 1050 DEG C) prevent tie Jiao, thermo-field thoery, reduces fuel feed, otherwise increases.

Stove major parameter: stove is exerted oneself: 200 ~ 4,000,000 kcals/h (adjustable)；Fire box temperature: 600 ~ 1000 DEG C (can Adjust).

Claims (1)

1. the automatic ignition of brown coal system of processing and an anti-coking injection burning furnace, including body of heater, maintenance fire door, smoke exhaust barrel, it is special Levying and be: body of heater is cylinder type, appearance is Plate Welding, and inner lining refractory block arranges the thermal insulating material made firm by ramming between refractory brick and outer steel plate The bed of material, body of heater is assembled by three cylindrical portions from top to bottom and constitutes；Bottom layer bottom has eight natural air inlet mouths, makees at air-introduced machine Under with, can inspiration combustion air；At 1.5 meters, bottom, have fuel mouth blown, on same circumference with its be at 90 ° installing put combustion Burning machine；Fuel mouth blown upwards 150 millimeters, each cross section of downward 150 millimeters and downward 450 millimeters are respectively provided with in 180 ° Two symmetrical wind-supplying mouths, each wind-supplying mouth is all arranged along inwall tangential direction, and each wind-supplying mouth passes through air channel connecting fan, is blown into certainly So wind；Smoke exhaust barrel top, equipped with electric gate valve, connects hot air duct bottom smoke exhaust barrel, hot air duct outlet equipped with electric gate valve and Temperature detection sensor；The top of body of heater arranges temperature detection sensor.