CN201209874Y - Dust removing apparatus special for reversing burning type biomass fuel combustion apparatus - Google Patents

Abstract

The utility model discloses a special dust collector of a downward flame biomass fuel firing device, comprising a vertical board and an inclined plate, wherein two side end faces of the vertical board are connected with an inner wall of a case of the downward flame biomass fuel firing device, an upper end face is connected with a lower end face of the inclined plate, other end faces of the inclined plate are connected with the inner wall of the case of the downward flame biomass fuel firing device; the vertical board, the inclined plate and the inner wall of the case enclose a cavity with a lower open, the cavity covers an outlet of the high temperature smoke arranged on a wall of the furnace, and a dust gauze is arranged at the lower end of the cavity. The utility model has reasonable design and good dust removal effect, causes fuel combustion full, which is widely applied reconstruction of old coal burning boilers and matching production of newly manufactured biomass boilers with bright market prospect.

Description

The special-purpose dust arrester of back-firing type biomass fuel combustion device

One, technical field: the utility model relates to a kind of parts of burner, particularly relates to the special-purpose dust arrester of a kind of back-firing type biomass fuel combustion device.

Two, 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 by compression forming.No any additives and binding agent.It is a kind of reproducible clean energy resource.Requirement according to the People's Republic of China's " regenerative resource method ", National Development and Reform Committee in August, 2006 tissue worked out " regenerative resource medium-term and long-term development plan ", developing goal and task to the year two thousand twenty regenerative resource in 2010 proposed, wherein, biomass solid formed fuel reaches 1,000,000 tons and 5,000 ten thousand tons respectively, and has established the status of biomass solid formed fuel as modern clean energy resource.

At present, China city has a large amount of small-sized hand coal-fired boilers, wherein mostly be distributed in the city and surrounding city, because what burn all is the high colm of sulfur content, because of miniature boiler does not have desulfurizer, add factors such as stoker's level is low, over-emitting black exhaust, sulphur pollution etc. have directly influenced the air quality of city and periphery, for this reason, the cry that the cancellation little molded coal boiler in city and coal change gas, electricity is very high, and many cities have taked action, but because source of the gas anxiety, electricity price costliness, and inaccessible city of city thermal or place produce little effect.Biomass fuel with cleaning substitutes coal, and using in the miniature boiler of city just becomes first-selection.But the structure of present most of miniature boilers all is not suitable for using biomass fuel (still having phenomenons such as over-emitting black exhaust, dust pollution).

Three, utility model content:

Technical problem to be solved in the utility model is: overcome the deficiencies in the prior art, provide a kind of reasonable in design, make fuel combustion fully and the special-purpose dust arrester of the back-firing type biomass fuel combustion device of good dedusting effect.

The technical solution of the utility model is: the special-purpose dust arrester of a kind of back-firing type biomass fuel combustion device, contain riser and hang plate, the both sides end face of described riser is connected with the inwall of back-firing type biomass fuel combustion device inner casing, the lower surface of its upper surface and hang plate is connected, other end faces of described hang plate are connected with the inwall of back-firing type biomass fuel combustion device inner casing, described riser, hang plate and described inner casing inwall surround the cavity of a lower ending opening, this cavity cover the high-temperature flue gas outlet that is provided with on the described furnace wall, and the lower end of this cavity is provided with basket strainer.

Described riser is dull and stereotyped, and described hang plate is flat board or arc, and the length of described flat board is less than the diameter or the length of described inner casing.Perhaps, described riser is an arc, and described hang plate is that arc is flat board or arc, and place, the summit of described arc is no more than the center of curvature of described inner casing.

Described basket strainer is an expanded metal lath, or is steel wire.

The beneficial effects of the utility model are:

1, the clean combustion theory of boiler oil thinks that clean combustion must satisfy three conditions: the one, and the temperature of having relatively high expectations (being not less than 380 ℃); The 2nd, the time that fuel gas stops in the high-temperature region will be grown; The 3rd, sufficient oxygen.The utility model can stop high-temperature flue gas and fuel directly from high-temperature flue gas outlet discharge, and it is long to have prolonged flue gas time of staying in high-temperature burner hearth, makes fuel combustion more abundant, fuel availability height, not over-emitting black exhaust.

2, the utility model soot dust granule good filtration effect, flue gas be motion from the top down under the effect of air-introduced machine, and an inertia force is arranged; when moving upward by this dust arrester; the bulky grain dust is got rid of in the ash bucket that drops down onto burner, and remaining flue dust is by basket strainer the time, and major part is blocked.Only surplus few part micronic dust enters the convection heating surface of back.Like this, the convection heating surface dust stratification is reduced, improved the effect of conducting heat, and improved boiler thermal output, supporting with it boiler soot emission concentration reduces greatly, even can also help environmental protection when reducing investment without chimney.

3, the utility model is reasonable in design, simple in structure, and basket strainer can Fast Installation or dismounting, and is simple, convenient, improved operating efficiency.

4, the utility model can be widely used in the transformation of old coal-burning boiler and clap cover production with the joining of biomass boiler of coming of new, has fabulous market prospects.

Four, description of drawings:

Fig. 1 is the structural representation of the special-purpose dust arrester of back-firing type biomass fuel combustion device;

Fig. 2 is one of vertical view of Fig. 1;

Fig. 3 be Fig. 2 vertical view two.

Five, the specific embodiment:

Embodiment one: referring to Fig. 1 and Fig. 2, among the figure, the special-purpose dust arrester 5 of back-firing type biomass fuel combustion device contains riser and hang plate, this riser and hang plate are flat board, the both sides end face of riser is connected with the inwall of back-firing type biomass fuel combustion device inner casing 4, the lower surface of its upper surface and hang plate is connected, other end faces of hang plate are connected with the inwall of back-firing type biomass fuel combustion device inner casing 4, riser, hang plate and inner casing 4 inwalls surround the cavity of a lower ending opening, this cavity cover high-temperature flue gas outlet 1, and the lower end of this cavity is provided with basket strainer 6 (7 are hanging block, are convenient to connect).High-temperature flue gas outlet 1 runs through the shell 2 and the water leg 3 of back-firing type biomass fuel combustion device, and is communicated with burner hearth that inner casing 4 surrounds.The length of riser is less than the diameter or the length of inner casing 4.Basket strainer 6 is an expanded metal lath, or is steel wire.

Operation principle: biomass fuel adds from the charge door of back-firing type biomass fuel combustion device, after lighting a fire, open air-introduced machine, the volatile matter in the fuel is separated out, and flame burns downwards, the existence of dust arrester 5, changed the flow direction of high-temperature flue gas, it is long to have prolonged flue gas time of staying in high-temperature burner hearth, makes fuel combustion more abundant, fuel availability height, not over-emitting black exhaust.In addition, flue gas is motion from the top down under the effect of air-introduced machine, and an inertia force is arranged, and when moving upward by dust arrester 5, the bulky grain dust is got rid of in the ash bucket that drops down onto burner, and remaining flue dust is by basket strainer 6 time, and major part is blocked.Only surplus few part micronic dust enters the convection heating surface of back.Like this, the convection heating surface dust stratification is reduced, improved the effect of conducting heat, and improved boiler thermal output, supporting with it boiler soot emission concentration reduces greatly, even can also help environmental protection when reducing investment without chimney.

Embodiment two: referring to Fig. 3, present embodiment and embodiment one are basic identical, and something in common does not repeat, and difference is: riser is an arc, hang plate is that arc is flat board or arc, and place, the summit of arc is no more than the center of curvature of described inner casing.

Claims (4)

1, the special-purpose dust arrester of a kind of back-firing type biomass fuel combustion device, contain riser and hang plate, it is characterized in that: the both sides end face of described riser is connected with the inwall of back-firing type biomass fuel combustion device inner casing, the lower surface of its upper surface and hang plate is connected, other end faces of described hang plate are connected with the inwall of back-firing type biomass fuel combustion device inner casing, described riser, hang plate and described inner casing inwall surround the cavity of a lower ending opening, this cavity cover the high-temperature flue gas outlet that is provided with on the described furnace wall, and the lower end of this cavity is provided with basket strainer.

2, the special-purpose dust arrester of described back-firing type biomass fuel combustion device according to claim 1, it is characterized in that: described riser is for dull and stereotyped, and described hang plate is flat board or arc, and the length of described flat board is less than the diameter or the length of described inner casing.

3, the special-purpose dust arrester of described back-firing type biomass fuel combustion device according to claim 1, it is characterized in that: described riser is an arc, described hang plate is that arc is flat board or arc, and place, the summit of described arc is no more than the center of curvature of described inner casing.

4, according to claim 1 or the special-purpose dust arrester of 2 or 3 described described back-firing type biomass fuel combustion devices, it is characterized in that: described basket strainer is an expanded metal lath, or is steel wire.

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