CN103808123B - With the torch firing wood chip of automatic returning charge and the dual-purpose hot blast stove system of burning weedtree and using method - Google Patents

Abstract

A kind of with automatic revert system torch firing wood chip and the dual-purpose hot blast stove system of burning weedtree, hot-blast stove is set, dry main frame, feeding system and many whirlwind collectors, automatic revert system, main exhauster, temperature sensor and fuzzy control instrument, export at drying machine, drying machine import, hot-blast stove outlet is equipped with temperature sensor respectively, relevant temperature is demarcated respectively by fuzzy control instrument, control returning charge spiral respectively, the frequency control motor of hot-blast stove overhead electric gate and upper material conveyer, regulate the fuel quantity entering hot-blast stove, the air capacity that drying machine sucks and the wet mass doses entering drying machine, respectively ensure institute demarcate temperature realization, thus realize system-wide Automated condtrol, and it is dual-purpose to realize a stove, improve efficiency of combustion.

Description

With the torch firing wood chip of automatic returning charge and the dual-purpose hot blast stove system of burning weedtree and using method

Technical field

the invention belongs to a kind of to the hot-blast stove of drying machine heat supply, particularly a kind of dual-purpose hot blast stove system with automatic returning charge torch firing wood chip and burning weedtree and using method.

Background technology

have two kinds at present the hot-blast stove of the drying machine heat supply of drying biomass fuel, a kind of is the hot-blast stove burning weedtree, its structural shape is: lower portion of furnace body has the fire grate of vertical lap seam, air inlet is had under fire grate, fire grate upper portion side wall has fire door, weedtree drops into from fire door, and in burner hearth combustion, drying machine main induced draft fan is directly by hot blast suction drying machine; Another kind take wood chip as the injection burning furnace of fuel, discrete and horizontal, and sidewall has spray material port, air inlet, preheating and light the combustor that fuel oil is housed usually, and fuel is supplied by Bunker usually, the shortcoming and defect of existence:

1, two kinds of type of furnaces, fuel can not dual-purpose; 2, burn wood chip to require to arrange auxiliary magnet combustion engine, just can light; 3, all need manual operation, can not automation be realized.

Summary of the invention

the object of this invention is to provide a kind of wood chip injection burning furnace with automatic returning charge and burn the dual-purpose hot blast stove system of weedtree, can a stove dual-purpose, the dry wood chip after oven dry can return to injection burning furnace automatically, achieves automation unattended.Once revert system breaks down, directly can drop into weedtree or wood chip from fire door, ensure that hot-blast stove continues heat supply.

technical scheme provided by the invention is: comprise hot-blast stove, dry main frame, feeding system, many whirlwind rewinding mouths, automatically revert system, main induced draft fan and electric-control system, it is characterized in that: the fire grate of material leak-proof is equipped with in the bottom, combustion chamber of hot-blast stove, it is primary combustion wind air intake space below fire grate, periphery has the air inlet of two opening and closing shutter, side wall upper part above combustion chamber stove grate arranges combustion-supporting airduct, and the lower sidewall of combustion chamber is provided with fuel airduct; Threeway is equipped with at top, lower logical combustion chamber, and top is by electric brake gate open air, and side leads to drying machine hot wind inlet.

the discharging opening of drying main frame connects the rewinding mouth of many cyclone dust collectors by dry materials outlet conduit, the discharging opening of many cyclone dust collectors arranges discharging wind stopping device;

sub-material spiral is set below the discharging wind stopping device of many cyclone dust collectors, product outlet is set in the rear end of sub-material spiral; Arrange returning charge mouth in the front end of sub-material spiral, returning charge mouth is inserted in the anti-blocking feed bin below sub-material spiral, is assembled with the rotating shaft of driven by motor in anti-blocking feed bin, rotating shaft is arranged driving lever and prevents fluffy material; The returning charge spiral of frequency control is set in the below of anti-blocking feed bin, fuel wind stopping device is set in returning charge spiral outlet and prevents the backwash of returning charge wind, the wind model system of the outlet access returning charge of fuel wind stopping device, namely the wood chip of oven dry is blown into injection burning furnace by returning charge pipeline by fuel blower fan;

drying machine feeding system: comprise scratch board conveyor, conveying worm and feeding air-locked valve that material homogenizer is housed.

good effect of the present invention: 1. fuel source is in the dry products of this drying system.Fuel quantity can export wind-warm syndrome according to hot-blast stove and require automatically to regulate, and the wood chip Thorough combustion thermal efficiency can reach 99%; 2. under returning charge equipment coordinates, utilize anti-blocking feed bin to realize drying machine fuel not fracture, the wood chip realizing drying system oven dry blows into hot-blast stove automatically, realizes the automatic supply of fuel, saves stove operation work, realize hot-blast stove automation.3. adopt programme-control by the proportion adjustment to fuel quantity and combustion air heat.Thus the control for brake that the temperature realizing hot-blast stove is exerted oneself.4. control system feeding device not putty, anti-blocking system does not affect the normal discharging of dryer.If 5. torch firing system malfunctions, wood fragments block directly can be dropped into from fire door 2-8, injection burning furnace becomes wooden unit combustion furnace, and drying system is produced as usual.6. regulate overhead electric gate, change the adjustable hot blast temperature entering drying machine of cold wind soakage.7. adopting the fire grate of horizontal joint to ensure, the wood chip of burning does not bleed under fire grate causes gambling plug.

Accompanying drawing explanation

fig. 1 is general structure schematic diagram of the present invention.

fig. 2 is the structure sectional view of hot-blast stove.

fig. 3 is the structure enlarged diagram in anti-blocking storehouse.

fig. 4 is that the fuel airduct of hot-blast stove bottom arranges schematic diagram;

fig. 5 is the fire grate sectional schematic diagram of hot-blast stove.

Detailed description of the invention

see Fig. 1-5, concrete structure is as follows:

the present invention by wood chip injection burning furnace, feeding system, dryer, material-receiving system, discharge system, return fuel system and main induced draft fan forms.Control instrument stuck with paste by outer gang mould.

hot-blast furnace body 2(is shown in Fig. 2) for cylindrical, external diameter about 3 meters, highly about 8 meters, crust is steel plate, and inner chamber is laying fireproof bricks, forms combustion space 2-2, filled heat insulating material between refractory brick and urceolus; Top is provided with flue 2-1, and fire grate 2-6 is equipped with in bottom, and fire grate 2-6 is bilevel horizontal joint fire grate, and the bilevel air vent of fire grate 2-6 staggers (see figure 5), results in blockage under preventing unburned sawdust from falling into fire grate; Certain space is left under fire grate 2-6, as primary combustion wind air intake space,

sidewall has air inlet, and hand door 2-5 is housed, and the sidewall of combustion space 2-2 is arranged combustion-supporting airduct 2-3, and combustion-supporting airduct 2-3 connects combustion fan 2-4; The lower sidewall of combustion space 2-2 is provided with fuel airduct 2-9, and fuel airduct 2-9 is tangential setting, is blown into fuel thus, fuel is formed in combustion chamber and revolves floating shape.In addition, sidewall also has operation fire door 2-8, draw material use as dropping into bulk during blow-on, and shoot door 2-7 is set.Threeway is equipped with on hot-blast stove top, and top communicates with air, and arranges the electric gate valve 2-11 of frequency control motor driving, and warm-air pipe 3 connects the air inlet of drying main frame 7 by side pipe 2-10;

feeding system (employing prior art) arranges the conveying worm 4 that hopper 6, feeder 5 and frequency control motor drive, discharging wind stopping device 1(for drying main frame charging aperture below the tail end discharge end of conveying worm 4 prevents cold wind from sucking), the charging aperture of main frame 7 is dried in below access.

material-receiving system is provided with dried material outlet conduit 8, and one end connects the discharging opening of drying main frame 7, and the other end connects the rewinding mouth 10 of many cyclone dust collectors 11; The discharging opening of many cyclone dust collectors 11 arranges discharging wind stopping device 12; The smoke exhaust pipe of many cyclone dust collectors 11 connects chimney 19 by main induced draft fan 20.

discharge system: see Fig. 3, has the sub-material spiral 13 that motor 13-3 drives, arranges product outlet 13-2 in the rear end of sub-material spiral 13 below discharging wind stopping device 12, and the below of product outlet 13-2 arranges finished bin 14(and sees Fig. 1); Arrange sub-material mouth 13-1 in the front end of sub-material spiral 13, sub-material mouth 13-1 is inserted in anti-blocking feed bin 19, is provided with the rotating shaft 17-3 that motor 17-2 drives, rotating shaft 17-3 arranges driving lever in anti-blocking feed bin 19; The returning charge spiral 17-4 driven by frequency control motor 17-1 is assembled below anti-blocking feed bin 19;

revert system: see Fig. 1,3, connects returning charge pipeline 18 from the discharging opening of returning charge spiral 17-4 by discharging wind stopping device 16; Returning charge blower fan 15 also connects returning charge pipeline 18; Returning charge pipeline 18 connects the fuel airduct 2-9 of hot-blast stove.

measuring system: export at the warm-air pipe 3 of hot-blast stove, drying machine import, outlet, be equipped with temperature sensor respectively, and (fuzzy control instrument and all adopt prior art with temperature sensor connected mode) is connected with the fuzzy control instrument of console 9.

with automatic revert system torch firing wood chip and the dual-purpose hot blast stove system using method of burning weedtree:

respectively temperature sensor is housed at dryer outlet mouth, dryer entrance mouth, hot-blast stove air outlet, respectively by fuzzy control instrument, demarcate relevant temperature, control the frequency control motor of returning charge spiral respectively, the frequency control motor of hot-blast stove overhead electric gate, the frequency control motor of upper material conveyer, regulate the fuel quantity entering hot-blast stove respectively, the air capacity that drying machine sucks, enter the wet mass doses of drying machine, ensure that temperature realization is demarcated by institute respectively, thus realize system-wide Automated condtrol.

before start, dry material moisture content as requested demarcates drying machine outlet wind-warm syndrome, demarcates the import wind-warm syndrome of drying machine according to the moisture content of wet stock, hot-blast stove outlet wind-warm syndrome is demarcated according to material drying kind, according to wet stock moisture content, dry material moisture content, require output, calculate Air Quantity Required.

dryer entrance mouth temperature controls as follows: during wet stock moisture content 60%, wind-warm syndrome 600 DEG C; During wet stock moisture content 50%, wind-warm syndrome 500 DEG C; During wet stock moisture content 40%, wind-warm syndrome 450 DEG C; During wet stock moisture content 30%, wind-warm syndrome 400 DEG C;

dryer outlet mouth temperature controls as follows: during dry material moisture content 15%, wind-warm syndrome 90 DEG C; During dry material moisture content 13%, wind-warm syndrome 100 DEG C; During dry material moisture content 10%, wind-warm syndrome 110 DEG C;

hot-blast stove outlet wind-warm syndrome controls as follows: when fuel is wood chip, wind-warm syndrome 900 DEG C, when fuel is powder of straw, and wind-warm syndrome, 700 DEG C; When fuel is bark powder, wind-warm syndrome 800 DEG C.

before blow-on, air intake gate 2-5 under fire grate opens by (see figure 2), seasoned wood is dropped on the bottom oven grate of hot-blast stove 2, and light, open main induced draft fan 20(and see Fig. 1), make to draw material to burn rapidly, treat that furnace chamber temperature reaches burning point (about 350 DEG C) the closedown air intake gate 2-5 of wood chip (biomass fuel), start combustion fan 2-4 and fuel charge blower fan 15, the dry wood chip got ready in advance constantly drops in anti-blocking feed bin, dry wood chip sprays into continuously in stove to be formed along inwall tangential direction and revolves floating shape, burns rapidly.In-furnace temperature rises rapidly, reaches injection burning furnace calibration request temperature.Start electric gate valve 2-11, normal temperature air sucks from top duct 2-1, and reach drying machine and demarcate temperature, dryer starts.Wet stock is dropped into drying machine by charger continuously, and hot blast and wet stock one piece are sucked drying system by main air blower, dry, and make humidity be down to less than 15%.Suck material-receiving system (many cyclone dust collectors), carry out fertilizer separation, wind is discharged from chimney, dry material enters sub-material spiral 13, and anti-blocking for returning charge feed bin, through front end sub-material mouth 13-1 discharging, is full of by a part, clout part, through the product outlet 13-2 of sub-material spiral 13 rear end, enters finished bin 14;

wood chip in anti-blocking Bunker 17 gives fuel airlock 16 by fuel returning charge spiral 17-4 (charging rate frequency conversion is adjustable), and sends into hot-blast stove 2 by returning charge blower fan 15.The wood chip amount entering hot-blast stove 2 is that the hot blast temperature required according to drying system determines.Its method is: by the quantity delivered regulating the speed of reinforced spiral 17-4 to adjust hot-blast stove wood chip, and the wood chip that anti-blocking feed bin reduces can be filled into automatically by sub-material auger, first sub-material spiral can ensure that anti-blocking feed bin is completely expected all the time, unnecessary material can be discharged by rear portion discharge port, enters finished bin.So both prevent hot-blast stove failure of fuel, hot-blast stove can be made again to have sufficient fuel adjusting amount.

wood chip injection burning furnace requires that fuel wood chip is moisture must be less than 15%, and ability Thorough combustion, for this reason, returns using a wood chip part for oven dry to injection burning furnace as fuel, and major part reclaims as finished product.The humidity of material and the charging rate of material to be automatically adjusted (patent of invention by external fuzzy control instrument, prior art), but dry humidity and the fire box temperature of product, fuel charge speed, material loading speed, combustion air volume carries out Comprehensive Control by external controller, with the humidity of product for controlling object, structure adjusting fuel charge amount, combustion air volume, and material loading speed, thus realize output and the product quality control of whole system.

as because of certain reason, fuel wood chip stops supply, fire grate bottom air inlet port strobe 2-5 can be opened, and with manually being dropped into by cutting weedtree from the dog-house 2-8 on fire grate top, hot-blast stove still can heat supply, and drying system still maintains normal production.

Claims (3)

1. a kind of with automatic revert system torch firing wood chip and the dual-purpose hot blast stove system of burning weedtree, comprise hot-blast stove, dry main frame, feeding system and many cyclone dust collectors, automatic revert system, main induced draft fan, temperature sensor and fuzzy control instrument, is characterized in that: the upper material conveyer of feeding system provides wet stock for drying main frame; Fire grate is equipped with in the bottom, combustion chamber of hot-blast stove, certain space is left apart from furnace bottom below fire grate, as primary combustion wind air intake space, sidewall below fire grate has several air inlet, and hand door is housed, as the injection burning furnace used time, closing gate, as the firebrand block stove used time, open it, to be drawn into combustion air; The sidewall of the combustion space on fire grate top arranges combustion-supporting airduct, and the lower sidewall of combustion space is provided with fuel airduct;

threeway is equipped with on hot-blast stove top, and top is communicated with air by electric gate valve, and warm-air pipe connects the air inlet of drying main frame by side pipe; The discharging opening of drying main frame connects the rewinding mouth of many cyclone dust collectors by dry materials outlet conduit, the discharging opening of many cyclone dust collectors arranges discharging wind stopping device; The smoke exhaust pipe of many cyclone dust collectors connects chimney by main induced draft fan;

sub-material spiral is set below the discharging wind stopping device of many cyclone dust collectors, product outlet is set in the rear end of sub-material spiral; Arrange sub-material mouth in the front end of sub-material spiral, sub-material mouth is inserted in the anti-blocking feed bin below sub-material spiral, is assembled with the rotating shaft of driven by motor, rotating shaft arranges driving lever in anti-blocking feed bin; In the below of anti-blocking feed bin, returning charge spiral is set, at returning charge spiral discharging mouth, fuel wind stopping device is set, the outlet of fuel wind stopping device is communicated with fuel conduit, the fuel fan outlet of fuel channel one termination frequency control, another termination injection burning furnace fuel airduct, whole drying system, forms negative pressure under main induced draft fan effect;

at the warm-air pipe air outlet of hot-blast stove, dry main frame air inlet, air outlet, respectively temperature sensor is housed, and is connected with the fuzzy control instrument of console.

2. according to claim described in 1 with automatic revert system torch firing wood chip and burning weedtree dual-purpose hot blast stove system, it is characterized in that: fire grate is bilevel horizontal joint fire grate, the bilevel air vent of fire grate staggers, and results in blockage under falling into fire grate to prevent unburned sawdust; Above fire grate, furnace wall has dog-house, and load onto fire door to be opened/closed.

3. one kind as claim the using method with automatic revert system torch firing wood chip and burning weedtree dual-purpose hot blast stove system described in 1, is characterized in that:

respectively temperature sensor is housed at oven dry main frame air outlet, air inlet, hot-blast stove air outlet, relevant temperature is demarcated respectively by fuzzy control instrument, control the frequency control motor of returning charge spiral respectively, the frequency control motor of hot-blast stove overhead electric gate, the frequency control motor of upper material conveyer, regulates the fuel quantity entering hot-blast stove respectively, dry the air capacity that main frame sucks, enter and dry the wet mass doses of main frame, ensure that temperature realization is demarcated by institute respectively, thus realize system-wide Automated condtrol;

drying main frame intake air temperature controls as follows: during wet stock moisture content 60%, wind-warm syndrome 600 DEG C; During wet stock moisture content 50%, wind-warm syndrome 500 DEG C; During wet stock moisture content 40%, wind-warm syndrome 450 DEG C; During wet stock moisture content 30%, wind-warm syndrome 400 DEG C;

drying main frame air outlet temperature controls as follows: during dry material moisture content 15%, wind-warm syndrome 90 DEG C; During dry material moisture content 13%, wind-warm syndrome 100 DEG C; During dry material moisture content 10%, wind-warm syndrome 110 DEG C;

hot-blast stove outlet wind-warm syndrome controls as follows: when fuel is wood chip, wind-warm syndrome 900 DEG C, when fuel is powder of straw, and wind-warm syndrome, 700 DEG C; When fuel is bark powder, wind-warm syndrome 800 DEG C.