阅读说明：本技术 生物质高温气化与低氮燃烧综合利用系统 (Biomass high-temperature gasification and low nitrogen burning utilization system ) 是由 刘效洲 赵荣 薛克书 胡艳鑫 王海 其他发明人请求不公开姓名 于 2019-08-07 设计创作，主要内容包括：本发明公开一种生物质高温气化与低氮燃烧综合利用系统,其包括气化炉、燃烧器和锅炉,所述气化炉的出气口通过管道与所述燃烧器的燃料进口连接,所述燃烧器安装在所述锅炉上,所述锅炉设置两个排烟口通过管道与两个蓄热式换热器烟气侧和烟囱依次连接；预热风管分别与两个蓄热式换热器空气侧连接后分别与辅助混合室连接,所述辅助混合室设置第一出口与混合器的第一入口连接,所述辅助混合室设置第二出口与气化炉高温空气入口和燃烧器的助燃空气第二入口连接,所述混合器的出口与燃烧器的助燃空气第一入口连接；烟囱通过管道和风机与气化炉的烟气入口和混合器的第二入口连接。本发明的有益效果是：有效节约能源,提高生物质气转换率,可达70-78％；燃烧充分,可以有效的降低Nox排放,Nox排放可以控制在80-150mg。(The present invention discloses a kind of gasification of biomass high-temperature and low nitrogen burning utilization system, it includes gasification furnace, burner and boiler, the gas outlet of the gasification furnace is connect by pipeline with the fuel inlet of the burner, the burner is mounted on the boiler, and the boiler is arranged two smoke outlets and is sequentially connected by pipeline and two heat regenerator fume sides and chimney；Pre- hot air pipe is connect with auxiliary mixing chamber respectively after connecting respectively with two heat regenerator air sides, the auxiliary mixing chamber setting first outlet and the first entrance of mixer connect, the auxiliary mixing chamber setting second outlet is connect with the combustion air second entrance of gasification furnace high temperature air entrance and burner, and the outlet of the mixer and the combustion air first entrance of burner connect；Chimney passes through the connection of the second entrance of pipeline and the smoke inlet and mixer of blower and gasification furnace.The beneficial effects of the present invention are: the effectively save energy, improves biogas conversion ratio, up to 70-78%；Burning sufficiently, can effectively reduce Nox discharge, and Nox discharge can control in 80-150mg.)

1. biomass high-temperature gasification and low nitrogen burning utilization system, which is characterized in that it includes gasification furnace, burner and pot The gas outlet of furnace, the gasification furnace is connect by pipeline with the fuel inlet of the burner, and the burner is mounted on described On boiler, the boiler is arranged two smoke outlets and is connect by pipeline with chimney；Pacify respectively between the smoke outlet and chimney Heat regenerator is filled, pre- hot air pipe is connect with auxiliary mixing chamber respectively after connecting respectively with two heat regenerators, described The entrance of mixing chamber setting first outlet and mixer is assisted to connect, the auxiliary mixing chamber setting second outlet and gasification furnace are high Warm air entrance is connected with the combustion air second entrance of burner, the outlet of the mixer and the combustion air of burner The connection of one entrance；Chimney is connected by the smoke inlet of pipeline and blower and gasification furnace.

2. a kind of biomass high-temperature gasification according to claim 1 and low nitrogen burning utilization system, which is characterized in that Control valve is arranged in the smoke inlet pipelines and exhanst gas outlet pipeline of the heat regenerator.

3. a kind of biomass high-temperature gasification according to claim 2 and low nitrogen burning utilization system, which is characterized in that The preheated air outlet conduit and preheated air outlet conduit of the heat regenerator are respectively provided with control valve.

4. a kind of biomass high-temperature gasification according to claim 3 and low nitrogen burning utilization system, which is characterized in that The heat regenerator includes shell and is arranged in the intracorporal heat storage medium of shell.

5. a kind of biomass high-temperature gasification according to claim 4 and low nitrogen burning utilization system, which is characterized in that The heat storage medium divides three-layer set in shell, is disposed with three layers from flue gas side entrance to flue gas side outlet, is respectively The first layer of porous Phase transformation ceramics ball is filled, the second layer of thermal storage ceramic ball and the third layer of filling accumulation of heat Cast-iron Ball are filled.

6. a kind of biomass high-temperature gasification according to claim 5 and low nitrogen burning utilization system, which is characterized in that The porous Phase transformation ceramics ball is made of porous ceramics shell with the sodium sulphate for being encapsulated in shell inner cavity, and porous Phase transformation ceramics ball is flat Equal outer diameter is in 30-50mm, and wherein inner cavity internal diameter is 20mm.

7. a kind of biomass high-temperature gasification according to claim 6 and low nitrogen burning utilization system, which is characterized in that First layer, the second layer and be 1: 2: 2 with the height ratio in third layer space in shell.

8. a kind of biomass high-temperature gasification according to claim 3 and low nitrogen burning utilization system, which is characterized in that The burner includes air inlet pipe, burning exocoel and combustion cavity, and first opening of air inlet pipe setting is connect with burning exocoel It communicates, second opening of air inlet pipe setting is tangentially connected to combustion cavity；The burning exocoel is arranged in outside combustion cavity In jacket space, the end of the burning exocoel is communicated with the end of combustion cavity.

9. a kind of biomass high-temperature gasification according to claim 8 and low nitrogen burning utilization system, which is characterized in that Premix chamber is set between the burning exocoel and the first opening, homogenating plate is set between the premix chamber and burning exocoel, it is described Premix chamber is communicated with the first opening.Biogas is evenly distributed in the burning exocoel by setting homogenating plate.

10. a kind of biomass high-temperature gasification according to claim 9 and low nitrogen burning utilization system, feature exist In the homogenating plate is porous plate.

Technical field

The present invention relates to biomass gasifying furnace and boiler system field, specifically a kind of biomass high-temperature gasification with it is low Nitrogen burning utilization system.

Background technique

Fossil fuel are increasingly in short supply, and caused environmental problem is increasingly severe, bioenergy as one of fungible energy source, More it is taken seriously.Biomass energy has the advantages that uniqueness: reproducibility, and low pollution, widely distributed property and total amount are abundant.It opens Hair has environmental-friendly, renewable and resource very abundant clean energy resource resource using biomass energy etc., is to solve Chinese stone Oil, coal shortage, ensure national energy security, preserve the ecological environment, improve the main strategic measure of China's sustainable development capacity.

Bioenergy oxygen content is more, sulfur content is low, ash content is low, and sulfur and nitrogen oxides concentration of emission is low after burning. Although N content is less than coal in biomass, due to the low heat value of biomass, using energy as standard, the N content and coal of biomass are same In an order of magnitude, the nitrogen oxide emission of biomass combustion product should not be underestimated.

Currently, there are two types of combustion systems in heating system for biomass fuel: a kind of directly to be burnt using biomass boiler； Another kind is using gasification after-combustion.Directly burning nothing due to the problem of structure of boiler body causes dust and NOx much exceeded Method reaches environment protection emission requirement；And using gasification after-combustion mode lower (being generally lower than 60%) there is also rate of gasification, NOx is exceeded It is the problems such as serious, anxious to be modified.More at present is to burn by the way of being conveyed again after gasification, but its technique is more complex, throws The problems such as money is also larger, lower exceeded serious with NOx there is also rate of gasification.

Summary of the invention

The purpose of the present invention is for deficiency existing for existing gasification technology described above, providing one kind can be improved biology Biomass high-temperature gasification and the low nitrogen burning utilization system of NOx emission is effectively reduced in matter gas shift rate.

To achieve the goals above, the invention provides the following technical scheme: a kind of gasification of biomass high-temperature and low nitrogen burning Utilization system comprising the gas outlet of gasification furnace, burner and boiler, the gasification furnace passes through pipeline and the burner Fuel inlet connection, the burner is mounted on the boiler, the boiler be arranged two smoke outlets respectively with heat accumulating type The flue gas side entrance of heat exchanger connects, and the flue gas side outlet of the heat regenerator is connect by pipeline with chimney, by flue gas Pass through smoke stack emission；Pre- hot air pipe connect respectively with the air side interface of two heat regenerators after respectively with auxiliary mixing chamber The first entrance of connection, the auxiliary mixing chamber setting first outlet and mixer connects, the auxiliary mixing chamber setting second Outlet is connect with the combustion air second entrance of gasification furnace high temperature air entrance and burner, the outlet and burning of the mixer The combustion air first entrance of device connects；Chimney enters by the second of pipeline and the smoke inlet and mixer of blower and gasification furnace Mouth connection.

Control valve is respectively provided on the pipeline and fume side outlet conduit of the flue gas side entrance of the heat regenerator.

Control valve is respectively provided on the air side inlet duct and air side outlet conduit of the heat regenerator.

The heat regenerator includes shell and setting in the intracorporal heat storage medium of shell, and the heat storage medium absorbs high temperature Flue gas heat, for heating the low temperature combustion air entered.

The heat storage medium divides three-layer set in shell, is disposed with three from flue gas side entrance to flue gas side outlet Layer, is the first layer for filling porous Phase transformation ceramics ball respectively, fills the second layer of thermal storage ceramic ball and fills accumulation of heat Cast-iron Ball Third layer.

The porous Phase transformation ceramics ball is made of porous ceramics shell with the sodium sulphate for being encapsulated in shell inner cavity, porous phase transformation Ceramic Balls mean outside diameter is in 30-50mm, and wherein inner cavity internal diameter is 20mm.

The first layer, the second layer and be 1:2:2 with the height ratio in third layer space in shell.

The burner includes air inlet pipe, burning exocoel and combustion cavity, and the air inlet pipe setting first is open and burning Exocoel connection communicates, and second opening of air inlet pipe setting is tangentially connected to combustion cavity；The burning exocoel setting is being burnt In jacket space outside inner cavity, the end of the burning exocoel is communicated with the end of combustion cavity.

Premix chamber is set between the burning exocoel and the first opening, equal wind is set between the premix chamber and burning exocoel Plate, the premix chamber are communicated with the first opening.Biogas is evenly distributed in the burning exocoel by setting homogenating plate, is made It burns more uniform, efficiency of combustion is improved.

The homogenating plate can be porous plate.

Compared with prior art, the beneficial effects of the present invention are: biogas conversion can be improved with the effectively save energy Rate, conversion ratio can achieve 70-78%；Burning sufficiently, can effectively reduce Nox discharge, make its be emitted on national standard with Under, Nox discharge can control in 80-150mg.

Detailed description of the invention

Fig. 1 is the system architecture schematic diagram of biomass high-temperature of the present invention gasification and low nitrogen burning utilization system；

Fig. 2 is that biomass high-temperature of the present invention gasification and the axial section view of burner in low nitrogen burning utilization system are illustrated Figure；

Fig. 3 is the left view schematic diagram of biomass high-temperature of the present invention gasification and burner in low nitrogen burning utilization system.

Fig. 4 is that biomass high-temperature of the present invention gasification and the section of heat regenerator in low nitrogen burning utilization system show It is intended to.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

A kind of gasification of biomass high-temperature and low nitrogen burning utilization system, as shown in Figure 1 comprising gasification furnace 1, burning The gas outlet of device 2 and boiler 3, the gasification furnace 1 is connect by pipeline with the fuel inlet of the burner 2, the burner 2 It is mounted on the boiler 3, the boiler 3 is arranged fume side of two smoke outlets respectively with heat regenerator (41,42) and enters The flue gas side outlet of mouth connection, the heat regenerator (41,42) is connect by pipeline with chimney 5, by the flue gas after heat exchange It is discharged by chimney 5.Pre- hot air pipe setting branch line connects with the air side interface of two heat regenerators (41,42) respectively It is connect respectively with auxiliary mixing chamber 7 after connecing, the air that will be heated by heat regenerator (41,42) is carried out in auxiliary mixing chamber 7 Collect, it is therefore an objective to balance the preheated air temperature of two heat regenerators (41,42), and guarantee that mixer 8 has heat always Air capacity, can continual supply mixer 8.The auxiliary mixing chamber 7 can be a cavity, pre- for storing and buffering Hot-air.The auxiliary mixing chamber 7 setting first outlet is connect with the first entrance of mixer 8, and it is logical that pipeline is arranged in the chimney 5 It crosses blower 6 to connect with the second entrance of mixer 8, be carried out in mixer 8 for introducing portion flue gas with high temperature combustion air Mixing.The preferred gas mixer of the mixer 8.The outlet of mixer 8 and the combustion air first entrance 28 of burner 2 connect It connects.The auxiliary mixing chamber 7 setting second outlet and the high temperature air entrance of gasification furnace 1 and the combustion air second of burner 2 Entrance 29 connects, and is gasified using high temperature air, gasification temperature can be improved, so that the ignition temperature of biogas is improved, And then effectively improve gasification efficiency.Chimney 5 is connect by pipeline and blower 6 with the smoke inlet of gasification furnace 1, and fume afterheat is utilized 1 endogenous substance of gasification furnace is preheated, to effectively reduce the discharge of nitrogen oxides.

Wherein, it is respectively provided on the fume side inlet duct and fume side outlet conduit of the heat regenerator (41,42) Control valve 9.The air side inlet duct and air side outlet conduit of the heat regenerator (41,42) are respectively provided with control valve 9, The flow direction of flue gas or combustion air can be regulated and controled by control valve.The preferred solenoid valve of the control valve 9.

The heat regenerator (41,42) is as shown in Figure 4 comprising shell and setting in the intracorporal heat storage medium of shell, Flue gas side entrance 48, flue gas side outlet 49, air side entrance 47 and air side outlet 46 are set on the shell.The accumulation of heat is situated between Matter absorbs high-temperature flue gas heat, then is used to heat the low temperature combustion air of entrance.Wherein, the heat storage medium divides in shell Layer setting, in order to improve heat exchange efficiency.The heat storage medium divides three-layer set in shell, from flue gas side entrance 48 to flue gas Side outlet 49 is disposed with three layers, is successively the first layer for filling porous Phase transformation ceramics ball respectively, filling thermal storage ceramic ball The third layer of the second layer and filling accumulation of heat Cast-iron Ball.The porous Phase transformation ceramics ball of first layer, has the function of fire resisting, and thermal capacity it is high, Heat transfer is fast, can be stored in fume afterheat in the phase change medium in the Ceramic Balls as heat storage, and passes through the molten of phase change medium Change to absorb the waste heat of high-temperature flue gas, heat low temperature combustion air is discharged by the solidification of phase change medium；By first The flue gas of secondary heat exchange pass sequentially through amount of stored heat it is relatively small thermal storage ceramic ball heat exchange after again by the smaller Cast-iron Ball of amount of stored heat into Row heat exchange, can effectively absorb fume afterheat, improve heat exchange efficiency.Wherein, the porous Phase transformation ceramics ball is by porous ceramics Shell and the sodium sulphate composition for being encapsulated in shell inner cavity, chamber generates phase-transition heat-storage inside the shell after sodium sulphate heat absorption, and amount of stored heat is non- Chang Gao.Porous Phase transformation ceramics ball mean outside diameter is in 30-50mm, and wherein inner cavity internal diameter is 20mm or so.Wherein, first layer, second Layer and be 1:2:2 with the height ratio in third layer space in shell, can absorb more than flue gas so to greatest extent with flue gas heat exchange In addition heat can also exchange heat with air to greatest extent, heat air.

The burner is as Figure 2-3 comprising air inlet pipe 21, burning exocoel 25 and combustion cavity 26, the air inlet First opening 22 of the setting of pipe 21 is connect with burning exocoel 25, and part biological matter gas is inputted burning exocoel 25 and is burnt；It is described Second opening 27 of the setting of air inlet pipe 21 is tangentially connected to combustion cavity 26, remaining biogas input combustion cavity 26 is revolved Turn burning；Ectonexine fractional combustion can be formed in this way, formed dual flame superposition, burnt more abundant, can effectively improve Efficiency of combustion and the discharge for reducing NOx.The jacket space that outside combustion cavity 26 and shell is formed is arranged in the burning exocoel 25 Interior, the end of the burning exocoel 25 is communicated with the end of combustion cavity 26, keeps inside and outside two layers of burned flame folded in exit Add, further increases efficiency of combustion.Premix chamber 23, the premix chamber are set between the burning exocoel 25 and the first opening 22 Homogenating plate 24 is set between 23 and burning exocoel 25, and the premix chamber 23 is communicated with the first opening 22, passes through the homogenating plate of setting 24 are evenly distributed in biogas in the burning exocoel 25, make to burn more uniform, efficiency of combustion is improved.Institute Setting bootstrap block 30 at the first opening 22 is stated, for fuel uniformly to be overflowed in homogenating plate 24 under the guidance of bootstrap block, with Reach the equally distributed purpose of fuel.Wherein, the homogenating plate 24 can be porous plate.Combustion-supporting sky is arranged in the burning exocoel 25 Gas first entrance 28, the combustion air first entrance 28 can be tangentially connected with the burning exocoel 25.Combustion air The reference of one entrance 28 is high temperature air and flue gas gaseous mixture, can effectively improve efficiency of combustion.The combustion cavity 26 is set Combustion air second entrance 29 is set, the combustion air second entrance 29 is connect with combustion cavity 26.Combustion air second entrance 29 references are high temperature airs, can effectively improve ignition temperature to guarantee that fuel stabilization catches fire, fold with burning 25 flame of exocoel Add, discharged nitrous oxides are effectively reduced.

Two discharge outlets of boiler of the present invention are connected with the air inlet of heat regenerator (41,42) respectively, are changed described in two The exhaust outlet of heat regenerator (41,42) connects chimney 5, and by treated, exhaust gas is discharged.At work, when boiler emission is useless Gas enters chimney 5 from the first heat regenerator 41, and combustion air enters auxiliary mixing after passing through the second heat regenerator 42 Room 7；When boiler emission exhaust gas enters chimney 5 from the second heat regenerator 42, combustion air passes through the first heat regenerator Enter auxiliary mixing chamber 7 after 41, heat regenerator (41,42) is changed described in two and switches over formula heat exchange, to improve heat exchange effect Rate.Boiler emission flue gas is by heat storage medium by exhaust outlet output chimney 5, high-temperature flue gas is passing through heat regenerator (41,42) heat storage medium is heated to 700 DEG C -800 DEG C when heat storage medium in.It is controlled after setting time by control valve 9 The air intake control valve 9 of current heat regenerator (41,42) is closed in switching, opens combustion-aid air pipe control valve 9, is opened another Heat regenerator (41,42) air intake control valve 9, and close its control valve 9；Exhaust gas is discharged by the heat regenerator Temperature is reduced to 100 DEG C -150 DEG C after heat storage medium heat absorption in (41,42), is then discharged in chimney 5, while described in heating Heat storage medium in heat regenerator (41,42).Combustion air is by the heat storage medium in the heat regenerator (41,42) Temperature after heating enters auxiliary mixing chamber 7 after rising to 650 DEG C -750 DEG C.After taking full advantage of burning in flue gas emission switching Fume afterheat combustion air is preheated, can with the effectively save energy, improve treatment effect.

Gasification furnace of the present invention presses NY/T2907-2016 " biomass normal pressure fixed-bed gasification furnace technical conditions ", NY/ T1417-2007 " stalk gasifier quality evaluation technical specification " and GB/T10180-2017 " Industrial Boiler thermal property experiment Regulation " standard method of test measures gasification efficiency and reaches 70% or more, gas heating value 4.48MJ/Nm3, and gas yield is 2.5m3/kg.

The flue gas emission of biomass high-temperature of the present invention gasification and low nitrogen burning utilization system referring to HJ57-2017 " Gu Determine waste gas of pollutant-sulfur dioxide measurement-constant potentiometric electrolysis ", GB/13271-2047 " boiler Air Pollutant Emission mark It is quasi- ", GB/T16157-1996 " the particulate matter and gaseous pollutants method of sampling in Concentration in Fixed Pollutants Source ", GB/T10180-2017 " Industrial Boiler thermal property Experimental Procedures ", the data that GB/5468-1991 " smoke-dust measurement method " standard detection obtains It is that nitrogen oxides controls between 80-150mg/m3, the general average value that detects is in 130mg/m3, oxygen content 5.1-5.4%.

As described above, the only preferred embodiment of the utility model, when cannot be limited with this utility model implementation range, I.e. generally according to simple equivalent changes and modifications made by the utility model claim and novel description, it is new all still to belong to this In the range of type patent covers.