CN203099815U

CN203099815U - Direct-injection-type biomass combustor

Info

Publication number: CN203099815U
Application number: CN2013200240631U
Authority: CN
Inventors: 王志祥; 王海全; 张景文
Original assignee: Beijing Nation Power New Energy And Environmental Protection Technology Co Ltd; ZHI YOU SOLAR INDUSTRY Co Ltd
Current assignee: Beijing Nation Power New Energy And Environmental Protection Technology Co Ltd; ZHI YOU SOLAR INDUSTRY Co Ltd
Priority date: 2013-01-16
Filing date: 2013-01-16
Publication date: 2013-07-31
Anticipated expiration: 2023-01-16

Abstract

The utility model belongs to the biomass energy utilization field, in particular to a direct-injection-type biomass combustor. The direct-injection-type biomass combustor comprises a feeding pipe, a secondary air inlet, a combustion chamber, an ignition hole, a slag discharging hole, a fireproof layer, a heat insulating layer, a secondary air chamber, a secondary air outlet, a high-temperature flame smoke channel and a combustor shell. After powder biomass raw materials are premixed with a primary air, the powder biomass raw materials enter a vertical type cylindrical combustor, after secondary air is preheated through the secondary air chamber, the secondary air is injected into the high-temperature flame smoke channel, complete combustion is conducted on imperfectly combusted solid particles and combustible gas, and then combusted flames and high-temperature smoke enter next level thermal equipment for use. The direct-injection-type biomass combustor has the advantages of being simple in structure, small and exquisite in size, stable in combustion, high in thermal efficiency, and suitable for various small and medium size occasions which need heat supply and drying.

Description

A kind of direct injection biomass burner

Technical field

The utility model belongs to the Biomass Energy Utilization field, is specifically related to a kind of direct injection biomass burner.

Background technology

Biomass energy has advantages such as storage capacity is abundant, use is nuisanceless as a kind of regenerative resource, is generally believed it is one of basic outlet that solves the future source of energy crisis.China is large agricultural country, has abundant biomass resource; Develop these biomass resources, all have great importance for alleviating energy shortage, the consumption of minimizing fossil fuel, protection environment etc.

Directly burning is the most practical mode of biomass energy utilization, is burned to large-scale boiler combustion from original cooking stove, and technology type is varied.Original modes such as cooking stove burning are invested very low but efficiency of combustion is also very low, generally only are 15%～20%; Modern boiler combustion, efficiency of combustion is higher, but is applicable to large-scale living beings utilization.Because characteristics such as the concrete energy density of living beings are low, volume is big, cost of transportation is higher relatively, causes the extensive cost that utilizes higher; Therefore a kind of small-sized efficient biomass combustion apparatus is expected to realize middle and small scale biomass efficient utilization cheaply.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of direct injection biomass burner is provided.

The utility model is that the technical scheme of the direct injection biomass burner taked of its technical purpose of realization is:

This direct injection biomass burner, comprise feed pipe, secondary wind inlet, fire hole, mud hole, the outlet of secondary wind, thermal-flame exhaust gases passes, burner inner casing, burner housing, it is characterized in that: the inwall of described burner inner casing is a flame retardant coating, outer wall is a heat-insulation layer, and its internal cavity is the combustion chamber; Space between described burner inner casing and the burner housing is a secondary air chamber; Described feed pipe, fire hole, thermal-flame exhaust gases passes all are communicated with the combustion chamber, and described feed pipe is the inlet tube of biomass material and a wind; Described secondary wind inlet links to each other with the side lower part of secondary air chamber, and the outlet of secondary wind links to each other with the upper lateral part of secondary air chamber, and is arranged in the inside of thermal-flame exhaust gases passes.

Preferably, described combustion chamber is a vertical type cylinder die cavity body, and mud hole is positioned at the bottom of combustion chamber, and feed pipe and fire hole are arranged in the combustion chamber side bottom, and the thermal-flame exhaust gases passes is arranged in combustion chamber side top.

Direct injection biomass burner of the present utility model, feed pipe are the inlet tubes of biomass material and a wind, and biomass material mixes the back from tangentially entering the combustion chamber therein with a wind, produces certain rotation in the combustion chamber, helps combustion reaction.Secondary wind inlet links to each other with the side lower part of secondary air chamber, and the outlet of secondary wind links to each other with the upper lateral part of secondary air chamber, and is arranged in the inside of thermal-flame exhaust gases passes; Secondary wind is after the secondary air chamber preheating, and in the inside of thermal-flame exhaust gases passes, the combustible gas that living beings powder imperfect combustion is formed carries out completing combustion, and burned flame and high-temperature flue gas enter the next stage heat power equipment and utilize.

Preferably, biomass material is a powder raw material.

Preferably, the thermal-flame exhaust gases passes is a gradual shrinkage cone passage.

Preferably, the thermal-flame exhaust gases passes is made by refractory material, the outsourcing insulation material.

The beneficial effects of the utility model are:

1. direct injection biomass burner provided by the utility model can be realized the efficient burning of powdery biomass material, and simple in structure, volume is small and exquisite, reliable.

2. biomass material and a wind premix are after feed pipe is together sent into combustion chambers burn, because the cylindrical structure of combustion chamber and the arranged tangential of feed pipe, make mixture in the combustion chamber, produce certain rotation, the reinforcement air mixes and combustion reaction with haul, is beneficial to the continous-stable operation of device.

3. secondary wind enters in the thermal-flame exhaust gases passes after the secondary air chamber preheating, and imperfect combustion solid particle and combustible gas are carried out completing combustion; By adjusting the different mode that sprays into of secondary wind, can control parameters such as combustion flame, flue gas flow, make device adjustable flexibly, satisfy different application demands.

Description of drawings

Fig. 1 is the front view of direct injection biomass burner of the present utility model;

Fig. 2 is the vertical view of direct injection biomass burner of the present utility model;

Number in the figure:

The 1-feed pipe; 2-secondary wind inlet; The 3-combustion chamber; The 4-fire hole; The 5-mud hole; The 6-flame retardant coating; The 7-heat-insulation layer; The 8-secondary air chamber; The outlet of 9-secondary wind; 10-thermal-flame exhaust gases passes; The 11-burner housing.

The specific embodiment

Below in conjunction with the specific embodiment the utility model is described further.

Embodiment 1

As shown in Figure 1, 2, direct injection biomass burner of the present utility model, comprise feed pipe 1, secondary wind inlet 2, combustion chamber 3, fire hole 4, mud hole 5, flame retardant coating 6, heat-insulation layer 7, secondary air chamber 8, secondary wind outlet 9, thermal-flame exhaust gases passes 10, burner housing 11, combustion chamber 3 is a vertical type cylinder die cavity body, arranges flame retardant coating 6, heat-insulation layer 7, secondary air chamber 8 and burner housing 11 from inside to outside successively; Mud hole 5 is positioned at the bottom of combustion chamber 3; Feed pipe 1 and fire hole 4 directly pass burner housing 11, secondary air chamber 8, heat-insulation layer 7 and flame retardant coating 6 respectively, insert combustion chamber 3 side lower parts; Thermal-flame exhaust gases passes 10 directly passes burner housing 11, secondary air chamber 8, heat-insulation layer 7 and flame retardant coating 6, inserts combustion chamber 3 upper lateral parts; Secondary wind inlet 2 links to each other with the side lower part of secondary air chamber 8, and secondary wind exports 9 and links to each other with secondary air chamber 8 upper lateral parts, and is arranged in the inside of thermal-flame exhaust gases passes 10; Biomass material burned flame and high-temperature flue gas under wind and the effect of secondary wind are entered the next stage heat power equipment and are utilized by 10 ejections of thermal-flame exhaust gases passes.

Combustion chamber 3 is of a size of

(diameter * highly), flame retardant coating 6 is that thickness is the mullite light weeight alumina brick of 170mm, heat-insulation layer 7 is that thickness is the silicate refractory fibre bundle of 130mm; Burner housing 11 is of a size of 1200 * 1200 * 1250mm(length * wide * height); Thermal-flame exhaust gases passes 10 is a gradual shrinkage cone passage, and corresponding size is: wide mouthful of external diameter is

The slot external diameter is By internal layer is that thickness is the rare nano material of Emery grains of 30mm, and heat-insulation layer is the silicate refractory fibre bundle of thickness 40mm.

Burner when operation is raw material with the powdery rice husk about 40 orders, and inlet amount is 100kg/h, and from tangentially entering combustion chamber 3, and limit rotation is therein risen and carried out imperfect combustion through feed pipe 1 for powdery rice husk and wind; Unburnt particle and combustible gas enter the thermal-flame flue gas to be passed through, and burns fully under the secondary wind effect of preheating; At excess air coefficient is that 1.15, wind and secondary wind ratio are under the operating mode of 6:4, and combustion flame temperature reaches 1350 ℃.

Based on above-mentioned device for carrying out said and workflow, can realize the continuous burning of biomass material, satisfy the demand of heat utilization equipment to the uninterrupted supply of heat.

Embodiment 2

Reference example 1, only the flame retardant coating 6 with the direct injection biomass burner changes to the lightweight aluminium material that thickness is 170mm; This burner can be realized the continuous burning of biomass material, satisfies the demand of heat utilization equipment to the uninterrupted supply of heat.

Embodiment 3

Reference example 1, only the biomass material of direct injection biomass burner being changed to granularity is 40 purpose sawdusts; This burner can be realized the continuous burning of biomass material, satisfies the demand of heat utilization equipment to the uninterrupted supply of heat.

The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of the present utility model.

Claims

1. direct injection biomass burner, comprise feed pipe (1), secondary wind inlet (2), fire hole (4), mud hole (5), the outlet of secondary wind (9), thermal-flame exhaust gases passes (10), burner inner casing, burner housing (11), it is characterized in that: the inwall of described burner inner casing is flame retardant coating (6), outer wall is heat-insulation layer (7), and its internal cavity is combustion chamber (3); Space between described burner inner casing and the burner housing (11) is secondary air chamber (8); Described feed pipe (1), fire hole (4), thermal-flame exhaust gases passes (10) all are communicated with combustion chamber (3), and described feed pipe (1) is the inlet tube of biomass material and a wind; Described secondary wind inlet (2) links to each other with the side lower part of secondary air chamber (8), and secondary wind outlet (9) links to each other with the upper lateral part of secondary air chamber (8), and is arranged in the inside of thermal-flame exhaust gases passes (10).

2. direct injection biomass burner according to claim 1, it is characterized in that: described combustion chamber (3) are vertical type cylinder die cavity body, described mud hole (5) is positioned at the bottom of combustion chamber (3), described feed pipe (1) and fire hole (4) are arranged in combustion chamber (3) side lower part, and described thermal-flame exhaust gases passes (10) is arranged in combustion chamber (3) upper lateral part.

3. direct injection biomass burner according to claim 1 is characterized in that: described feed pipe (1) is arranged tangential with combustion chamber (3).

4. direct injection biomass burner according to claim 1 is characterized in that: described thermal-flame exhaust gases passes (10) is a gradual shrinkage cone passage.

5. according to claim 1 or 4 described direct injection biomass burners, it is characterized in that: described thermal-flame exhaust gases passes (10) is made by refractory material, the outsourcing insulation material.