CN202432524U

CN202432524U - Multi-fuel waste incinerator

Info

Publication number: CN202432524U
Application number: CN2011205168778U
Authority: CN
Inventors: 宋军; 张俊祥; 李见; 胡正阳
Original assignee: CHINA CEC ENGINEERING Corp
Current assignee: CHINA CEC ENGINEERING Corp
Priority date: 2011-12-13
Filing date: 2011-12-13
Publication date: 2012-09-12
Anticipated expiration: 2021-12-13

Abstract

Disclosed is a multi-fuel waste incinerator which comprises a chain grate furnace as a main body. The multi-fuel waste incinerator is a structure assembled by two drums which are longitudinally arranged in a single layer, and comprises an upper incinerator body, a lower fire grate combustion chamber, a superheater, a tail coal economizer and an air preheater. Water cooled walls, convection tubes and downtake tubes are utilized as bearings for the drums. A base of the incinerator body is arranged on upright supports on two sides of the fire grate. The combustion chamber is of a rectangular structure covered by the water cooled walls, partially insulated or provided with refractory castables on the water cooled walls to balance heat. Spiral-flow nozzles are arranged on methane combustors which are arranged in the middle of a front wall of the incinerator, and each combustor nozzle faces downwards and forms an angle with a central line. A combustion fan is utilized for each methane combustor, and the speed of the combustion fan is regulated via frequency control. The multi-fuel waste incinerator is simple in structure, compact in arrangement, stable in combustion, high in heating efficiency, and capable of realizing mixing combustion of various fuel wastes and independent combustion.

Description

Many fuel incinerator

Affiliated technical field

The utility model equipment belongs to the boiler class, is a kind of many fuel incinerator.

Background technology

The pulping and paper-making industry can produce a certain amount of accessory substance in process of production, and like bark, wood chip, mud, biogas etc., these products will pollute environment as not being used or carrying out harmless treatment.

For large-scale enterprises in pulp and paper industry; Because pulping and paper-making output is big, and is big with the steam power consumption, disposed large-scale coal heating boiler at present mostly or provided thermo-power station for oneself; Usually mostly boiler is the recirculating fluidized bed form; Can utilize the technical characterstic of CFBB like this, mix the burning discarded object, handle and utilization again.But for the less enterprises in pulp and paper industry of scale, adopt the chemi-mechanical pulp production technology enterprise, utilize the gas heating generating or mainly utilize the enterprises in pulp and paper industry in outside vapour source; Owing to himself no large-scale fire coal circulating fluid bed boiler; Or have only the common chain-grate boiler of simple fire coal, so the effective discarded object that produces of burning disposal.Normally can not get harmless treatment like bark, wood chip, mud abandons or landfill with regard to outward transport; Biogas is usually without taking off H ₂S handles, with regard to air burning.These processing modes require to follow the tracks of practicable to the environmental protection treatment of discarded object, processing cost is high, also can't utilize the value of discarded object self.

The utility model content

It is many fuel msw boiler of main fuel with bark, wood chip, biogas and fire coal that the utility model is intended to develop a kind of.This incinerator can the various fuel of multifuel combustion, also can the various fuel of independent burning.

The technical scheme of utility model: many fuel incinerator; Be the main body with the chain furnace grate stove; It is characterized in that: boiler adopts the vertical individual layer of two drums to arrange that package assembly is divided upper body, fire grate combustion chamber, bottom, superheater, afterbody economizer and air preheater; Two side walls, convection tube and down-comer are adopted in the drum supporting, and the boiler body base is installed on the column support of fire grate both sides; The combustion chamber is a rectangular configuration, adopts water-cooling wall to coat, part is adiabatic or on water-cooling wall, be aided with the structure of castable refractory balance heat; Biogas burner adopts the spiral-flow type spout, is arranged in boiler front wall middle part, and each is angled to center line downwards for burner nozzle; Biogas burner adopts independently combustion fan, and adopts frequency control.

The advantage of the utility model: simple in structure, layout compactness; Flameholding, the thermal efficiency is high; Can realize multiple discarded object fuel multifuel combustion and burning separately.

Description of drawings

Fig. 1 is many fuel incinerator structural representation.

Fig. 2 is the A-A view.

Fig. 3 is the B-B view.

Among the figure: big of 1-top drum and water-cooling wall, 2-bottom furnace wall and water-cooling wall, 3-traveling-grate stoker device, 4-combustion chamber; The 5-biogas burner, 6-burner control valve group, 7-mucking machine, 8-ash hoist; The 9-economizer, 10-solid mixed waste fuel-feed pipe, 11-acoustic wave soot blower.

The specific embodiment

Embodiment: many fuel incinerator, evaporation capacity 15t/h; Pressure 0.8MPa (g) steams; The temperature of steaming: 176 ℃; Fuel is multifuel combustion or the various fuel of pure burning such as bark, wood chip, mud, biogas, fire coal.

Many fuel incinerator adopts the vertical individual layer of two drums to arrange, simple in structure, layout compactness adopts package assembly, divides top drum and water-cooling wall big 1, bottom furnace wall and water-cooling wall 2, superheater (if desired), afterbody economizer 9 and air preheater.Main two side walls, convection tube and the down-comer of leaning on of drum supporting, heating surface is prone to the dust stratification place and is provided with acoustic wave ash ejector 11.Boiler pressure parts and top furnace wall weight are mainly leaned on the upper body base support.The body base is installed on the column support of fire grate both sides.

Traveling-grate stoker device 3: on the chain fire-gate basis of routine, adopt big and wide fire grate structure.Because solid fuels such as bark, wood chip and mud are little than coal-fired density, moisture content is high, calorific value is low, the burning amount is big; So more common coal-fired chain furnace grate furnace; Fire grate length is long by 15%, and width is wide by 15%, with the even accumulation that guarantees fuel, be provided long preheating and burning time.Than common coal-fired furnace superintendent 1m, wide 0.5m, grate area 17.4m ²Adopt large stretch of fire grate segment, control fire grate gap prevents escape of fuel, leaks ash, and the fire grate afterbody is established mucking machine 7, is used to slag tap, and ash hoist 8 is established in the fire grate front portion, is used to remove the thin ash that accumulate the fire grate front portion.

Combustion chamber 4 structures: because the exhaust gas volumn that the burning of low heat value, high-moisture fuel produces is big, water content is high; The burning amount is big; It is rectangular configuration that incinerator adopts the combustion chamber, and the characteristic of based on fuel can adopt water-cooling wall to coat, part is adiabatic or on water-cooling wall, be aided with castable refractory balance heat.Adopt big and high combustion chamber 4 structures, volume is big, burning time is long, heat endurance is strong, and combustion chamber 4 more common coal-burning boilers are big by 60%, highly high 2m.Can guarantee that bark, wood chip, mud and biogas fuel can fully burn, improve boiler thermal output.The left and right wall in combustion chamber is established water-cooling wall and next part case, and front-back wall is a heat insulating construction.

Biogas burner 5 structures: boiler, the particularly boiler of burning gases fuel, safety is primary forever.If ignite when the content of inflammable gas surpasses explosion limit in the burner hearth, the consequence that causes will be serious.Incinerator needs according to the characteristics of biogas burning and safety requirements is arranged and structural design.

Biogas burner 5 adopts preposition, and two biogas burners 5 become 20 degree angles to spray to the center, and flame clashes into each other, reduces the flame rigidity of gas, avoids traveling-grate stoker device 3 part solid combustion tissues are exerted an influence; Biogas burner 5 is 10 degree angles downwards and sprays, and increases the distance of flame wall behind the combustion chamber, increases the time of staying of biogas fuel in burner hearth simultaneously, guarantees abundant burning.

The biogas combustion system mainly is made up of program control cabinet, gas igniter, flame detecting device, burner, burner control valve group 6 etc.Burner control valve group 6 also possesses following function: biogas ignition protection function; The switch of each pneumatic fast valve of automatic or manual control; The switching of manual control mode; The real-time tracking of operating condition indication and program control ignition process; Biogas diffuses function; Flame monitoring and flame failure protection function; Light a fire and successfully reach the loss of ignition indication; Manual mode is accomplished by on-site control step by step.

Biogas burner 5 adopts the spiral-flow type spout, reduces flame rigidity, is arranged in boiler front wall middle part; Each is angled to center line downwards for burner nozzle, avoids the influence to fire grate burning tissue, and that biogas burner flame and incinerator smoke are flowed to is tangent the while like this; Form the eddy flow state, prolong the burning time of biogas, biogas is fully burnt; And can carry out secondary to the biomass fuel suspension and burn, improve the after-flame degree of fuel, strengthened efficiency of combustion.

Because the combustion air volume, the blast that burn biogas operating mode and pure burning biogas working condition requirement are different mixing, so biogas burner adopts independently combustion fan, and adopts frequency control, with control combustion air volume and blast.

Solid mixed waste fuel-feed pipe 10 structures: after adopting pluralities of fuel to mix, the mode of unification hopper pan feeding from the stokehold evenly distributes fuel, has simplified feeding system.Owing to improved the flow behavior of fuel after many fuel mix, reduced the generation of feed bin putty.

Claims

1. many fuel incinerator; Be the main body with the chain furnace grate stove; It is characterized in that: boiler adopts the vertical individual layer of two drums to arrange that package assembly is divided upper body, fire grate combustion chamber, bottom, superheater, afterbody economizer and air preheater; Two side walls, convection tube and down-comer are adopted in the drum supporting, and the boiler body base is installed on the column support of fire grate both sides; The combustion chamber is a rectangular configuration, adopts water-cooling wall to coat, part is adiabatic or on water-cooling wall, be aided with the structure of castable refractory balance heat; Biogas burner adopts the spiral-flow type spout, is arranged in boiler front wall middle part, and each is angled to center line downwards for burner nozzle; Biogas burner adopts independently combustion fan, and adopts frequency control.