CN202452512U - Feeding device of biomass boiler - Google Patents

Abstract

The utility model relates to a feeding device of a biomass boiler and solves the problem of combustion imbalance caused by the fact that large particle heavy fuel and small particle light fuel enter a combustion chamber from a same position. A feed divider is arranged on the front arch portion of a high-low composite arch, the feeding device is divided into two blanking pipes, a first branch pipe is connected with an air inlet, a second branch pipe penetrates through the front arch wall of the high-low composite arch to enter a combustion chamber, and a diverting valve is arranged on the branching position of the blanking pipe. The feeding device of the biomass boiler is mainly used for biomass boiler feeding.

Description

The biomass boiler feed arrangement

Technical field

The utility model relates to middle-size and small-size biomass fired boiler parts, especially a kind of feed arrangement.

Background technology

Biomass fuel is the fuel that agricultural crop straw, wood chip, sawdust, peanut shell, corncob, rice husk, branch, leaf, hay are directly utilized through compression forming.No any additives and binding agent.It is a kind of reproducible clean energy resource.This kind of boiler is biomass solid fuel (abbreviation biomass fuel) boiler, is to utilize new technology and the professional equipment type of furnace with the biomass fuel after-flame, and burn-off rate reaches 96%, remains 4% ash and can reclaim potash fertilizer.Fuel is in combustion process, and environmental pollution is little, and biomass fuel is as the fourth-largest energy beyond coal, oil, the natural gas, and it will become the future world of paramount importance one big energy.The biomass fuel sulfur compound is very low, does not have desulphurization problem, and volatile component is high, and carbon activity is high, inflammable.Under the temperature about 400 degree, the most of volatile component of biomass energy can disengage, and is translated into the gaseous fuel ratio and is easier to realize.Burning back ash content is few, and is difficult for cohering, and can simplify deashing device.Calorific capacity not only can replace coal and other fuel fully, and it is cheap at 3600-5100 kilocalorie/kilograms, and the boiler operatiopn cost reduces greatly, compares with fuel oil, combustion gas, electric boiler, and cost reduces by 60%, 40%, 70% respectively.Use biomass fuel, clean environment firendly, regenerating energy-saving meet national energy environment protection policy, obtain country and advocate energetically and promote.

At present, China city has a large amount of coal-burning boilers, wherein mostly is distributed in the city periphery, because burning all is colm; And most of sulfur content is high, and the burning measure is poor, and operant level is low; No desulfurizer, boiler over-emitting black exhaust, sulphur pollution etc. have directly influenced the air quality of city and periphery, for this reason; The cry that cancellation city coal burning boiler and coal change oil (gas), electricity is very high, and many cities have taked action, but because oil (gas) source is nervous, electricity price is expensive; The boiler operatiopn cost is high, and city thermal has inaccessible zone, produces little effect.Adopt its operating cost of biomass boiler low, and realization need not, and the auxiliary equipment processing just can reach nitride and the sulfide approximate zero is discharged.

Biomass fuel with cleaning substitutes coal, on the boiler of city, uses just to have solved above problem.But the biomass boiler of producing at present, big-and-middle-sized with CFBB in bulk, small-sized be main with fast-assembling fire-tube type reciprocating-grate boiler; Have plenty of on former coal-burning boiler and simply convert, have that fuel is single, the thermal efficiency is not high, be prone to the defective of dust stratification.

According to the collecting and distributing property of domestic material fuel distribution and the discontinuity of most of boiler operatiopn, and biological material shape is not quite similar, and fine particulate arranged, bulk is arranged, if get into through the boiler same position, then possibly influence combustion efficiency.

Summary of the invention

In view of this, the utility model provides a kind of biomass boiler feed arrangement, and difform living beings get into from the diverse location of combustion chamber, to improve the heat utilization ratio after biomass combustion discharges.

For realizing above-mentioned purpose; The utility model can reach through following measure: biomass boiler mainly comprises traveling-grate stoker, independent air compartment, the compound chimney arch of height, secondary air system, boiler pressure-bearing body, soot blower system, energy-saving appliance, connection flue, air preheater, base, furnace wall and heat-insulation layer; The face arch place of composite arch establishes feed arrangement at the said high end; Said feed arrangement is the material blanking tube that is divided into two; First branched pipe links to each other with air inlet, and the preceding buttress that second branched pipe passes the height composite arch gets into burner hearth, and the bifurcation of material blanking tube is established diaphragm valve.

Further, said diaphragm valve is a deflector.

Further, said material blanking tube is down " Y " font.

The beneficial effect of the utility model is, is provided with material blanking tube and diaphragm valve, and different material is shunted, and patch fuel gets into from the higher position, and the fine grained material gets into from the bottom, can promote the efficiency of combustion of fuel.

Description of drawings

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

Specific embodiments

Below in conjunction with accompanying drawing the utility model is further described: as shown in Figure 1, biomass boiler mainly comprises traveling-grate stoker 2, independent air compartment 3, just compound chimney arch 4, secondary air system 5, boiler pressure-bearing body 6, connects flue 7, energy-saving appliance 8, connects chassis 9, air preheater 10, back-end ductwork 11, soot blower system 12, boiler foundation 13, furnace wall and heat-insulation layer 14.

This feed arrangement is the material blanking tube that is divided into two, and a branched pipe links to each other with air inlet 16, and the preceding buttress that another branched pipe passes the height composite arch gets into burner hearth, and the bifurcation of material blanking tube is established diaphragm valve 15.Fuel is sent into feeding-distribution device 1 from transport, and for graininess property material, the preceding buttress that passes the height composite arch through a branched pipe wherein directly slips into burner hearth, in the compound chimney arch 4 of height with on the traveling-grate stoker 2, burns; Then through the diaphragm valve 15 in the feed arrangement, present embodiment is a deflector for lightweight fines fuel, the rotation deflector; Make lightweight fines fuel get into another branched pipe; Mix with the air of air inlet 16, it be suspended in the burner hearth burn, unburned brush lightly to drop on the fire grate burn away.

One time wind is sent into burner hearth through air preheater, independent air compartment 3, and air compartment quantity and intake can be regulated arbitrarily, if operate miss causes air compartment to fill up dust stratification, the connecting plate between the detachable independent air compartment 3 is removed dust stratification from the outside clean.

Secondary wind is sprayed to burner hearth through multitube combined type secondary air system 5, and airduct is adjustable, according to different combustion positions, can regulate wind arbitrarily.The high-temperature flue gas of fuel after the burner hearth internal combustion; Behind the waterwall tube radiant heat transfer of boiler pressure-bearing body 6,, get into energy-saving appliance 8 through connecting flue 7 then again through the convection bank convection heat transfer' heat-transfer by convection; Low-temperature flue gas after the heat exchange that feedwater is delayed in energy-saving appliance 8; Get into air preheater 10 through connecting chassis 9, get into back-end ductwork 11 at last, boiler feedwater becomes the drum that high humidity steam gets into boiler pressure-bearing body 6 through the energy-saving appliance heat exchange; Steam water interface is through each heating surface Natural Circulation in the drum, and the saturated vapor that the heat absorption back forms is sent to send into through stop valve and produced the user.

With steam or the combination soot blower system 12 of compressed air through being criss-cross arranged; Purge the cigarette ash of convection bank outer surface bonding clean; Chimney arch in furnace wall and the heat-insulation layer 14 adopts large span self-locking radial brick to build by laying bricks or stones, and firm, stable is difficult for collapsing, and the external packing backplate adopts the moulding pressing block.Whole boiler is placed on the base 13 fixing.

Claims (3)

1. biomass boiler feed arrangement; Said biomass boiler comprises traveling-grate stoker, independent air compartment, the compound chimney arch of height, secondary air system, boiler pressure-bearing body, soot blower system, energy-saving appliance, connection flue, air preheater, base, furnace wall and heat-insulation layer It is characterized in that,The face arch place of composite arch establishes feed arrangement at the said high end, and said feed arrangement is the material blanking tube that is divided into two, and first branched pipe links to each other with air inlet, and the preceding buttress that second branched pipe passes the height composite arch gets into burner hearth, and the bifurcation of material blanking tube is established diaphragm valve.

2. biomass boiler feed arrangement as claimed in claim 1 is characterized in that, said diaphragm valve is a deflector.

3. biomass boiler feed arrangement as claimed in claim 1 is characterized in that, said material blanking tube is down " Y " font.

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