CN201421085Y

CN201421085Y - Suspension gasification combustor for straw granules with low content of NOx and SOx

Info

Publication number: CN201421085Y
Application number: CN2009200275831U
Authority: CN
Inventors: 刘爱国
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-16
Filing date: 2009-06-16
Publication date: 2010-03-10
Anticipated expiration: 2019-06-16

Abstract

The utility model belongs to the field of biomass combustion device, in particular to a suspension gasification combustor for straw granules with low content of NOx and SOx. The utility model is characterized in that the combustor comprises a horizontal casing. One end of the casing is enclosed, and the other end is opened. The lower part of the casing is provided with a material inlet. The upperpart of the casing is provided with a gasification agent inlet, a primary air inlet and a secondary air inlet. The combustor employs oxygen enriched air and vapor as the gasification agent, combines advanced biomass suspension gasification combustion technology and pollutant control technology, utilizes the features of the biomass such as high active reaction and the like, improves the burn-off rate of the straw granules, reduces the discharge of the NOx and SOx, and has the advantages of low cost, high burn-off rate and environmental protection.

Description

Stalk particle hangs down NOx, SOx suspension gasification combustor

Technical field

The utility model belongs to biomass combustion device field, is specifically related to the low NOx of a kind of stalk particle, SOx suspension gasification combustor.

Background technology

Poorness day by day along with fossil energy, development and use as the biomass energy of the fourth-largest energy receive much concern, biomass energy is that the form with material object exists, and compares wind energy, water energy, solar energy, ocean energy, this heat etc., and living beings are unique regenerative resources that can store and transport.Global air pollution at present further aggravates, and reduces CO ₂Become the focus that countries in the world solve the energy and environment problem Deng the clean discharge capacity of pernicious gas.

Because CO during the biomass granule fuel burning ₂Clean discharge capacity be 0 substantially, the NOx discharge capacity only is coal-fired 1/5, the discharge capacity of SOx only be 1/10 of a fire coal, so biomass granule fuel directly to use be an effective way of carrying out biomass efficient, cleaningization utilization in the world wide.

Following table is that the Industrial Analysis composition and the element of several main biological particles burnings formed

As can be seen from the above table, the volatile matter height of biological particles burning, it is carrying out before the even gas-phase combustion, separated out most of volatile, remaining fixed carbon is experiencing the out-phase combustion reaction, and its combustion process is strong heat-producing chemical reaction, be heat transfer, the mass transport process between fuel and air, the heat that produces in the combustion process raises environment temperature, impels mass transport process to accelerate again, this be make heat produce a kind of faster chain reaction process.

The utility model content

The purpose of this utility model provides a kind of oxygen-enriched air and steam of utilizing and is gasifying agent, generates the low NOx of the low stalk particle of NOx, SOx, SOx suspension gasification combustor when making stalk particle sufficient combustion, burning.

Be achieved through the following technical solutions during the utility model:

Be the low NOx of a kind of stalk particle, SOx suspension gasification combustor, it is characterized in that comprising horizontal housing, described housing one end sealing, other end opening, lower housing portion is provided with charging aperture, and housing top is provided with gasifying agent import, wind inlet and secondary wind inlet.

Described charging aperture is near the blind end of housing, and described gasifying agent import, wind inlet, secondary wind inlet are successively away from the blind end of housing.

The blind end of housing is provided with flame-observing hole and burner troubleshooting mouth.

The utility model has utilized the hyperoxic feature of living beings, adopt oxygen-enriched air and steam to cooperate the air stage feeding structure and the advanced suspension gasification, and combustion technology of prior art as gasifying agent, can strictly control combustion gasification temperature and a wind coefficient of excess air about 0.6, reduce the pollution that completing combustion and imperfect combustion produce greatly, do not need to adopt smoke eliminator just can reach discharge standard fully.

The utility model except control reduces disposal of pollutants, is being controlled the heat output facet, by adjusting the temperature of boiler bore temperature and water when gasification, and combustion, changes in flow rate realizes, adjust parameters, thereby the assurance fire box temperature is stablized in the range of set value assurance completing combustion.

Living beings suspension gasification, and combustion mode is applied on the middle-size and small-size Industrial Boiler, be state-of-the-art in the world combustion system at present, after the utility model passes through ignition for the first time normally, need not other auxiliary thermal source when restarting, at interval after 72 hours, restart in 5 to 10 minutes, just can reach normal gasification, and combustion again.

The utility model adopts oxygen-enriched air and steam as gasifying agent, in conjunction with advanced living beings suspension gasification, and combustion technology and pollutant control technology, utilize characteristics such as biomass active reaction height, improved the burn-off rate of stalk particle, reduced the discharging of NOx, SOx, had that cost is low, burn-off rate is high, the advantage of environmental protection.The utility model does not increase any desulfurization facility (the carbon sulfur-bearing is generally less than below 0.2% in the living beings) with respect to the fossil energy burner, has both reduced operating cost, and the influence to environment has been reduced to minimum again.Through experiment, when the utility model uses, with oxygen-enriched air and steam as gasifying agent, gasification reaction speed obviously improves, be reduced to about 3 seconds by original 8 seconds, its burn-off rate can reach (relevant with the fuel particle size) more than 98%, in addition when guaranteeing complete burnup, reduce the coefficient of excess air of secondary wind as much as possible, reached and reduced the purpose that NOx, SOx generate.

Description of drawings

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

Fig. 2 is the left view of Fig. 1.

As shown in FIG.: 1 stalk particle carrier pipe; 2 charging apertures; 3 flame-observing holes; 4 housings; 5 gasifying agent air inlets; 6 wind inlets; 7 secondary wind inlets; 8 burner troubleshooting mouths.

The specific embodiment

As shown in Figure 1 and Figure 2, horizontal housing 4 one ends sealing, other end opening, housing 4 bottoms are provided with the charging aperture 2 near blind end, charging aperture 2 is connected with stalk particle carrier pipe 1, and the gasifying agent import on housing 4 tops 5, wind inlet 6, secondary wind inlet 7 are successively away from the blind end of housing 4.The blind end of housing 4 is provided with flame-observing hole 3 and burner troubleshooting mouth 8.

When the utility model uses, with the supporting use of middle-size and small-size Industrial Boiler, stalk particle is transported to charging aperture 2 through stalk particle carrier pipe 1, enter from housing 4 bottoms, by the ignition first time normal after, utilize gasifying agent import 5 to send into oxygen-enriched air and steam, by wind inlet 6 and 7 air-supplies of secondary wind inlet as gasifying agent, stalk particle burn-off rate height has reduced NOx, SOx that burning is produced greatly.When the utility model starts, need not other auxiliary thermal source, after 48 hours to 72 hours blanking time, restart in 5 to 10 minutes, just can reach normal gasification, and combustion again.

Claims

1, the low NOx of a kind of stalk particle, SOx suspension gasification combustor, it is characterized in that comprising horizontal housing, described housing one end sealing, other end opening, lower housing portion is provided with charging aperture, and housing top is provided with gasifying agent import, wind inlet and secondary wind inlet.

2, the low NOx of stalk particle according to claim 1, SOx suspension gasification combustor is characterized in that the blind end of described charging aperture near housing, and described gasifying agent import, wind inlet, secondary wind inlet are successively away from the blind end of housing.

3, the low NOx of stalk particle according to claim 1, SOx suspension gasification combustor is characterized in that the blind end of housing is provided with flame-observing hole and burner troubleshooting mouth.