CN101097065A

CN101097065A - Boiler using biomass as fuel

Info

Publication number: CN101097065A
Application number: CNA2006100169693A
Authority: CN
Inventors: 朴显泽; 马建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-26
Filing date: 2006-06-26
Publication date: 2008-01-02

Abstract

The invention discloses a boiler with biomass as fuel, which is characterized by the following: comprising boiler chassis 1, furnace bed 2, fire box 4, boot 3, front pipeline 5, rear pipeline 17, upper drum 13, lower drum 18, convection tube bank 12, water inlet 15, hot water or steam outlet 14 and smoke outlet 16; arranging whirl pipeline 6 on the upper of the front pipeline 5 and the rear pipeline 17; bracing the whirl pipeline 6 between the front pipeline and the rear pipeline; forming to a body; opening one to two round rotary hole 8 on the whirl pipeline 6; arranging one to several grade whirl twice wind device in the round rotary hole 8; constructing the device with communicated twice wind main pipe 24, twice wind endless tube 7 and twice wind injector 21; adopting reciprocating grate for the furnace bed 2; constructing the reciprocating grate with reciprocating grate of head air supply; setting the head of the furnace bed sheet as multiple layer step; setting multiple through hole at each layer step. This invention possesses simple production and low cost, which can be fit for the boiler with capacity below 10t/h.

Description

A kind of boiler that utilizes biomass as fuel

Technical field

The present invention relates to a kind of equipment that utilizes the renewable sources of energy, particularly relate to a kind of boiler that utilizes biomass as fuel

Background technology

At present on the market, the boiler of biomass-burning fuel mainly is, introduces the technology of Denmark BWE company, adopts water-cooled vibrating-grate stoker mode to burn biomass fuel, and its shortcoming is complex structure, cost height; With Sweden Germany is the employing recirculating fluidized bed mode of representative, and domestic also have enterprise of a few family to use this technology, but CFBB blower fan power consumption is big, furnace wall material cost height, should not be used for the following boiler of 10t/h capacity; In addition, the patent of invention of Shanghai Communications University's application, the patent No. be ZL03150475.2's " variable furnace arch structure low NOx biomass boiler ", this boiler adopts traditional fire grate segment, this fire grate segment is very easily burnt out in the furnace front pyrolysis zone, and logical storehouse, fire grate bottom air distribution easily makes fuel in furnace front conflagration, its consequence is that flame burns forward, the easy burn-out fuel hopper; If improve fire grate speed, then fuel can't after-flame, and boiler efficiency is reduced greatly, and this boiler burning-used biologic mass fuel separately needs to mix the burning coal sometimes in addition.

Summary of the invention

Purpose of the present invention is exactly in order to overcome the deficiency of prior art, proposes that a kind of production cost is low, manufacturing process is simple, the thermal efficiency is high, fuel saving, environmental protection characteristic are good, burning-used biologic mass fuel and be applicable to the biomass fuel boiler that the 10t/h capacity is following fully

This goal of the invention is achieved through the following technical solutions:

This invention mainly comprises: furnace base 1, fire grate 2, burner hearth 4, feed hopper 3, face arch 5, rear arch 17, upper drum 13, lower drum 18, convection bank 12, water inlet 15, hot water or steam (vapor) outlet 14, outlet flue 16, it is characterized in that: be provided with vortex arch 6 above face arch 5 and

rear arch

17,6 of vortex arches are integral between forward and backward arch and with forward and backward arch; Offer one to two circle and revolve hole 8 on vortex arch 6, one to multiple level vortex overfire air device is set in circle is revolved hole 8, this device is made of the female pipe 24 of the secondary wind that is interconnected, secondary vane pipe 7 and overfire air jet 21; Fire grate 2 adopts reciprocal grate, and this reciprocal grate is made of the reciprocating furance row of head air feed, and this fire grate segment head has the multilayer step, and every layer of step has a plurality of air vents.

Because this invention adopts reciprocal grate to substitute in the past vibrating-grate stoker, and the employing head reciprocating furance row of drying, ubiquitously when having overcome traditional burner screening firing biomass fuel leak out, leak the overheated problem such as burn out of material, fire grate segment.Simultaneously, adopt reciprocal grate, greatly reduce production cost and difficulty of processing.

Natural wind is blown into burner hearth from the fire grate segment bottom through fire grate segment head multilayer air vent, the heat that utilizes face arch 5 is to newly entering the fuel thermal decomposition in the stove, most of flammable fugitive constituent is separated out, biology is blamed the combustion composition then can stablize after-flame under rear arch 17 insulations and radiation, this structure has guaranteed boiler burning-used biologic mass fuel separately, and can burn efficiently.

6 of vortex arches fuse with it between face arch 5 and rear arch 17, offer one or more circles in vortex arch upper edge boiler width direction and revolve hole 8, according to the boiler capacity difference, revolve and can arrange one or more levels vortex overfire air device in the hole 8.This combining structure can make along the rear arch 17 chaotic flue gases that flow forward, enter after converging with flue gas fugitive constituent under the face arch 5 and revolve in the hole 8, under the wind action of vortex secondary, the rotation of flue gas limit, mix on the limit, Bian Shangsheng, the flying dust that carries in the flame is separated with flue gas, thereby reach the dust-laying effect of boiler itself, reduced the pollution of dust in the boiler emission flue gas, the flue gas of rotation can revolve 8 places, hole formation air curtain, larger particles in the flue gas stopped melt down row, burn away, can impel flue gas to mix better with air, thereby reduced the combustible gas component in the flue gas, because the burning of fuel gas full entry has improved fire box temperature in the flue gas, and boiler slag carbon content is reduced significantly, further improve boiler thermal output, promote environmental protection characteristic.

Description of drawings

Fig. 1 is this invention structural representation

Fig. 2 is the A-A cutaway view of Fig. 1

Figure 1B-B the cutaway view of Fig. 3 for amplifying

Fig. 4 is the C-C cutaway view of Fig. 1

Wherein: 1-furnace base 2-fire grate 3-feed hopper 4-burner hearth 5-face arch 6-vortex arch 7-secondary vane pipe 8-revolves preceding arch tube 10-side wall pipe 11-rear arched tube 12-convection bank 13-upper drum 14-hot water of hole 9-or the female pipe of steam (vapor) outlet 15-water inlet 16-outlet flue 17-rear arch 18-lower drum 19-cleaning door 20-access hole 21-overfire air jet 22-furnace wall 23-collection case 24-secondary wind

The specific embodiment

The invention will be further described in conjunction with the accompanying drawings and embodiments in bottom:

As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, this invention mainly comprises: furnace base 1, fire grate 2, burner hearth 4, feed hopper 3, face arch 5, rear arch 17, upper drum 13, lower drum 18, convection bank 12, water inlet 15, hot water or steam (vapor) outlet 14, outlet flue 16, it is characterized in that: be provided with vortex arch 6 above face arch 5 and

rear arch

17,6 of vortex arches are integral between forward and backward arch and with forward and backward arch; Offer two circles and revolve hole 8 on vortex arch 6, the two-stage scroll overfire air device is set in circle is revolved hole 8, this device is made of the female pipe 24 of the secondary wind that is interconnected, secondary vane pipe 7 and overfire air jet 21; Fire grate 2 adopts reciprocal grate, and this reciprocal grate is made of the reciprocating furance row of head air feed, and this fire grate segment head has the multilayer step, and every layer of step has a plurality of air vents.

Preceding arch tube 9, rear arched tube 11, side wall pipe 10, formation radiation heating-surface, convection bank 12 is communicated between upper drum 13, the lower drum 18, upper drum 13 is provided with water inlet 15 and hot water or steam (vapor) outlet 14, the boiler front end is provided with feed hopper 3, be provided with outlet flue 16 at the boiler rear side, reciprocal grate 2 bottoms have cleaning door 19, access hole 20, and whole boiler places on the base 1.

Claims

1, a kind of boiler that utilizes biomass as fuel, mainly comprise: furnace base [1], fire grate [2], burner hearth [4], feed hopper [3], face arch [5], rear arch [17], upper drum [13], lower drum [18], convection bank [12], water inlet [15], hot water or steam (vapor) outlet [14], outlet flue [16] is characterized in that:

A, be provided with vortex arch [6] in the top of face arch [5] and rear arch [17], vortex arch [6] frame is integral between forward and backward arch and with forward and backward arch;

B, offer one to two circle revolve hole [8] on vortex arch [6], one to multiple level vortex overfire air device is set in circle is revolved hole [8], this device is by the female pipe of the secondary wind that is interconnected [24], secondary vane pipe [7] and overfire air jet [21] formation;

C, fire grate [2] adopt reciprocal grate, and this reciprocal grate is made of the reciprocating furance row of head air feed, and this fire grate segment head has the multilayer step, and every layer of step has a plurality of air vents.

2, a kind of boiler that utilizes biomass as fuel according to claim 1 is characterized in that: offer two circles and revolve hole [8] on vortex arch [6].

3, a kind of boiler that utilizes biomass as fuel according to claim 1 and 2 is characterized in that: in circle is revolved hole [8], secondary vortex overfire air device is set.