CN101749707B

CN101749707B - Biogas burner

Info

Publication number: CN101749707B
Application number: CN2009102653444A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shidai Taoyuan Environment Science And Technology Co Ltd Beijing
Current assignee: Beijing Fairyland Environmental Technology Co ltd
Priority date: 2009-12-29
Filing date: 2009-12-29
Publication date: 2013-03-27
Anticipated expiration: 2029-12-29
Also published as: CN101749707A; CN102853427A; CN102853427B

Abstract

The invention relates to a biogas burner, which includes an ejector and a nozzle. The biogas burner is characterized in that the ejector includes a lead-in section and mixing section which are coaxially arranged; the caliber of the mixing section is more than that of the lead-in section so as to form a clearance and lead in air for mixing; the mouth part of the nozzle is provided with a plurality of channels with small calibers which are arranged in a plum blossom shape and are communicated; or a plurality of channels with small calibers are arranged in a circular shape separately; the circular-shaped channels with small calibers are arranged in multi-layers; the calibers of the inner layer are small and the calibers of the outer layer are big. The inlet end of the lead-in section is uniformly provided with a circle of small holes along a side wall; the upper port of the mixing section is uniformly provided with a circle of small holes along the side wall. The mixing section or the lead-in section is provided with swirling flow sheets; and the upper port of the mixing section is provided with a gridded flame holder. The biogas burner solves a plurality of problems like safely and effectively burning biogas in current fermentation biogas processing and utilizing system with none pollution, etc.

Description

Biogas burner

Technical field

The present invention relates to the structure of burner, particularly a kind of biogas burner.

Background technology

Fermentation methane is to utilize such as house refuse, ight soil, mud, sewage the like waste to carry out the gas that produces behind the anaerobic fermentation, and it mainly is comprised of methane, carbon dioxide, steam and lot of trace impurity.

The collection utilization of fermentation methane more and more is subject to people's attention, and because these gases all are to come from the discarded object fermentation, belong to regenerative resource, it utilizes and dissolves and not only can substitute non-renewable fossil fuel, and can reduce the discharging of greenhouse gases.

But, in the fermentation methane processing and utilizing system and since aerogenesis with not the mating of gas, often need to arrange burning facility and burn unnecessary gas is concentrated.In addition, owing to often there is the high sewage of pollution concentration to discharge in the middle of the aforementioned offal treatment process, become " percolate " in refuse landfill, the tupe that percolate is a kind of new " treatment of wastes with processes of wastes against one another " is processed in the gas combustion that utilizes the discarded object fermentation to produce.Biogas burner namely is to research and develop on this basis.Traditional biogas utilization, generally be as domestic gas, its corresponding burner---kitchen range---has become comparatively common combustion apparatus, but burns the burner that needs in the evaporation technology for a large amount of gases burnings or percolate, does not also have ripe application at present.In addition, the safety of existing burner in order to guarantee to burn, generally all adopting diffusion type is main burner, the peril of " tempering " class can not occur like this, but burns difficulty of control ratio, the content of pollutant is also higher in the combustion product.

Summary of the invention

The object of the invention is to, for solve at present in fermentation methane processing and utilizing system biogas safe, efficiently, the problems such as contamination-freely burning, thereby a kind of biogas burner is provided.

For achieving the above object, a kind of biogas burner of the present invention comprises: injector and nozzle, it is characterized in that described injector comprises introducing section and the mixing section of coaxial setting, the bore of mixing section is greater than introducing section, to form the gap, introduce air and mix;

The mouth of described nozzle is provided with the passage of some small-bores.Solve the danger of tempering by the design of local aperture, and guarantee that whole burnt area is constant, the bore design of the single aperture of air-flow meets the requirement of quenching distance.

Another kind as technique scheme improves, and some small-bores of described mouth are arranged and are plum blossom-shaped, and are communicated with setting.Or some small-bores of described mouth are circular separation setting; Described circular small-bore multilayer arranges, and the internal layer aperture is little, and outer aperture is large.

Another important improvement as technique scheme, the described entrance point of introducing section evenly is provided with a circle aperture along sidewall, like this, air can be entered burner also and combustion gas mixing by injection, not only can reduce the flow velocity of combustion gas, and the required air quantity that can injection enters to burn is about 40%, improves burning and exhausting.These apertures have determined the air capacity that injection enters, the size of primary air ratio namely, and it will directly affect the quality of combustion process and discharging.Further, the upper port of described mixing section evenly is provided with a circle aperture along sidewall.Like this, one can make empty combustion mix more abundant; The 2nd, reduce the temperature of head, to material require low, service life that can extension device; The 3rd, have the effect of steady flame.The described entrance point of introducing section is set to centre bore and the little pore structure of a circle.Centre bore is the passage of combustion gas, and the setting of a circle aperture is not only simple in structure, and is that effectively the enough air of injection are reduced the loss apart from the nearest local perforate of high speed of combustion gas.

As another improvement of technique scheme, be provided with the swirling flow sheet in described mixing section or the introducing section.Described swirling flow sheet is two, is half elliptic, and in the circle centre position arranged crosswise.These two swirling flow sheets are rounded in the projection of introducing on the section cross section, and when air-flow passed through, the swirling flow sheet rose and revolves to strengthen to mix.

As another improvement of technique scheme, the upper port of described mixing section is provided with latticed flame holder, and the stable operation range of burner has the structure that comes to a great extent this part.When flow is large, flame stabilization, burning work duty ratio can reach 1: 20～and 30, and generally speaking, only be about 1: 10.The isolation mesh screen preferred further, that described latticed flame holder is arranged for roughly being well word shape, the height of this isolation mesh screen is 30mm.The form of latticed flame holder has multiple, and the stable operation range of burner has the structure that comes to a great extent this part.

The invention has the advantages that, the aperture of the version of the nozzle of design of the present invention, blender bottom and latticed flame holder, for biogas provides a kind of burner, solved at present in fermentation methane processing and utilizing system biogas safe, efficiently, the problems such as burning contamination-freely.During biogas combustion utilizes, safe combustion is the problem that at first will solve, because bionethanation system aerogenesis speed is inhomogeneous, the fluctuation of tolerance alters a great deal, make air sneak into system but also may produce gas leakage, if there is tempering to occur to develop into imponderable accident, the form of its nozzle has taken into full account the combustion characteristics of methane, can effectively prevent the generation of tempering; The aperture of blender bottom mainly is to utilize the negative pressure of the popular one-tenth of high-speed fuel gas to come the injection air, according to calculating, the air of stoichiometric ratio 0.4～0.6 is introduced thus, and with combustion gas mixing, the discharge amount of pollution of premixed gas combustion product will be less; Latticed flame holder can the Effective Raise burner stable operation range, to adapt to the significant variation of biogas generation.

Description of drawings

Fig. 1 is that the structure of the nozzle of biogas burner of the present invention is partly cutd open schematic diagram;

Fig. 2 is the structural representation of the nozzle head of Fig. 1;

Fig. 3 is that another structure of the nozzle of biogas burner of the present invention is partly cutd open schematic diagram;

Fig. 4 is the structural representation of the nozzle head of Fig. 3;

Fig. 5 is the structural representation of the injector of biogas burner of the present invention;

Fig. 6 is another structural representation of the injector of biogas burner of the present invention;

Fig. 7 is the structural representation of the swirling flow sheet in the injector of biogas burner of the present invention;

Fig. 8 is the structural representation of head of mixing section of the injector of biogas burner of the present invention;

Fig. 9 is another structural representation of head of mixing section of the injector of biogas burner of the present invention;

Figure 10 is the structural representation of entrance point of introducing section of the injector of biogas burner of the present invention.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, structure of the present invention is described in more detail.

A kind of biogas burner of the present invention comprises: injector and nozzle; As shown in Figure 1, the mouth of described nozzle is provided with the passage of some small-bores, and nozzle chamber is straight tube shape.Some small-bores of described mouth are arranged and are plum blossom-shaped, and the connection setting, and as shown in Figure 2, nozzle chamber is tapered.Or some small-bores of described mouth are circular separation setting, as shown in Figure 3; Described circular small-bore multilayer arranges, and the internal layer aperture is little, and outer aperture is large, as shown in Figure 4.

As illustrated in Figures 5 and 6, the described entrance point of introducing section evenly is provided with a circle aperture along sidewall, (aperture only is shown among the figure), like this, air can be entered burner also and combustion gas mixing by injection, not only can reduce the flow velocity of combustion gas, and the required air quantity that can injection enters to burn is about 40%, improves burning and exhausting.The upper port of described mixing section evenly is provided with a circle aperture along sidewall.So that empty combustion mixing is more abundant, temperature and the steady flame of reduction head.

Be provided with the swirling flow sheet in described mixing section or the introducing section.As shown in Figure 5, in introducing section, be provided with the swirling flow sheet; As shown in Figure 6, in mixing section, be provided with the swirling flow sheet.Described swirling flow sheet is two, as shown in Figure 7, is half elliptic, and in the circle centre position arranged crosswise.These two swirling flow sheets are rounded in the projection of introducing on the section cross section, and when air-flow passed through, the swirling flow sheet rose and revolves to strengthen to mix.When not having other devices in the pipe, in general mixing section or introducing section have the ratio of height to diameter parameter, adopt the purpose of the easier realization mixing of scope of certain ratio of height to diameter.Spinning disk is arranged in this example, strengthened disturbance, ratio of height to diameter can be more smaller, saved material.

Shown in Fig. 8 and 9, the upper port of described mixing section is provided with latticed flame holder, the isolation mesh screen that described latticed flame holder is arranged for roughly being well word shape, and the height of this isolation mesh screen is 30mm.The form of latticed flame holder has multiple, and the stable operation range of burner has the structure that comes to a great extent this part.

As shown in figure 10, the entrance point of the introducing section of the injector of biogas burner is set to centre bore and the little pore structure of a circle.Centre bore is the passage of combustion gas, and the setting of a circle aperture is not only simple in structure, and is that effectively the enough air of injection are reduced the loss apart from the nearest local perforate of high speed of combustion gas.

It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although with reference to embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. biogas burner comprises: injector and nozzle, it is characterized in that,

Described injector comprises introducing section and the mixing section of coaxial setting, and the bore of mixing section, is introduced air and mixed to form the gap greater than introducing section;

The mouth of described nozzle is provided with the passage of some small-bores; The channel arrangement of some small-bores of described mouth is plum blossom-shaped, and is communicated with setting.

2. biogas burner according to claim 1 is characterized in that, the described entrance point of introducing section encloses aperture or/and the upper port of mixing section evenly is provided with one along sidewall.

3. biogas burner according to claim 1 is characterized in that, the described entrance point of introducing section is set to centre bore and the little pore structure of a circle.

4. biogas burner according to claim 1 is characterized in that, is provided with the swirling flow sheet in described mixing section or the introducing section.

5. biogas burner according to claim 4 is characterized in that, described swirling flow sheet is two, is half elliptic, and in the circle centre position arranged crosswise.

6. biogas burner according to claim 1 is characterized in that, the upper port of described mixing section is provided with latticed flame holder.

7. biogas burner according to claim 6 is characterized in that, the isolation mesh screen that described latticed flame holder is arranged for roughly being well word shape, and the height of this isolation mesh screen is 30mm.