CN209295149U - A kind of waste gas combustion furnace with built-in porous firebreak - Google Patents

Abstract

The utility model discloses a kind of waste gas combustion furnaces with built-in porous firebreak, including exhanst gas outlet after VOC air inlet, burner, burner hearth, porous firebreak and burning, the burner is mounted on the right side of burner hearth, the VOC air inlet is mounted on the upper right side of burner hearth, exhanst gas outlet is mounted on the left side of burner hearth after the burning, one of porous firebreak of smoke outlet setting after close burning in the burner hearth.The porous firebreak of the utility model can reduce flue gas flow rate, improve VOC in residing time in furnace；The heat radiation of flame can be prevented to be lost by exhanst gas outlet after burning, major part heat radiation is reflected back in burner hearth, fire box temperature is improved；When flue gas stream can be allowed to flow through the aperture of porous firebreak, due to drag effect, keep vertical flow of flue gas direction air-flow velocity more balanced, and increases disturbance of the air-flow in furnace, to keep vertical flow of flue gas direction temperature in burner hearth more balanced, to improve burning ratio.

Description

A kind of waste gas combustion furnace with built-in porous firebreak

Technical field

The utility model relates to a kind of volatile organic compounds incinerators, especially a kind of to have built-in porous firebreak Waste gas combustion furnace.

Background technique

At present the technique of volatile organic compounds (VOC) incinerator be VOC it is preheated after or do not preheat by VOC into Port enters burner hearth, is lighted by burner, stablizes burning in burner hearth, and the flue gas generated after burning is arranged by exhanst gas outlet after burning It comes out of the stove outer.

But current incinerator has following problem:

1, and then the incinerator of burning process after being preheated using VOC, places VOC preheater generally after incinerator, lead to Often in order to protect preheater, the temperature general control of incinerator is being not higher than 760 DEG C；It is generally limited, is burned by place and cost Furnace length will not be made greatly, cause VOC all shorter in residing time in furnace；Furnace temperature is low and residing time in furnace is short causes Incinerator burns incomplete.

2, the incinerator directly into furnace burning process is not preheated using VOC, since VOC gas self-temperature is low, even if burning Mouth power is enough, it is also difficult to make a large amount of VOC reach sub-fraction VOC around very high temperature or burner be heated to it is very high Temperature, and VOC farther away from burner cannot be effectively heated to very high temperature after entering in furnace；Foring one with burner is Colyliform temperature field of the heart perpendicular to flow of flue gas direction, higher, remoter from the burner place of the local VOC temperature closer from burner Temperature is lower；It causes in this way and is difficult effectively to be burned compared with the VOC of distant positions from burner.

Utility model content

To solve the above problems existing in the prior art, the utility model, which will design one kind, can make volatile organic compound Object homogenous combustion, and the waste gas combustion furnace with built-in porous firebreak of volatile organic compounds completely burned can be made.

To achieve the goals above, the technical solution of the utility model is as follows: a kind of useless with built-in porous firebreak Exhanst gas outlet after gas incinerator, including VOC air inlet, burner, burner hearth, porous firebreak and burning, the burner are mounted on The right side of burner hearth, the VOC air inlet are mounted on the upper right side of burner hearth, and exhanst gas outlet is mounted on burner hearth after the burning Left side, in the burner hearth after burning smoke outlet setting porous firebreak together.

Further, the porous firebreak is the standard refractory brick masonry wall uniformly distributed at hole；Or it is big for customization The small porous refractory per se with uniformly distributed aperture is brick to build up wall, no longer boxes out between porous refractory brick and porous refractory brick Hole.

Further, the porous firebreak by standard refractory brick masonry at hole uniformly distributed wall when, the waterpower of hole Diameter is not more than 100mm, and hole spacing is not more than 400mm.

Further, the porous firebreak by the size customized the fire resisting brick masonry per se with uniformly distributed aperture at When wall, customization refractory brick side length itself is not more than 400mm, and aperture is evenly arranged on brick, and hole diameter is not less than 10mm, aperture Wall thickness is not less than the half of hole diameter between aperture, and wall thickness is not less than the one of hole diameter at aperture back gauge brick outer wall side Half.

Further, the area of the porous firebreak is identical as the burner hearth cross-sectional area at masonry.

Compared with prior art, the utility model has the following beneficial effects:

1, the porous firebreak of the utility model can reduce flue gas flow rate, improve VOC in residing time in furnace, to mention High burning ratio.

2, the porous firebreak of the utility model can prevent the heat radiation of flame to be lost by exhanst gas outlet after burning, Most of heat radiation is reflected back in burner hearth, fire box temperature is improved, to improve burning ratio.

3, when the porous firebreak of the utility model can allow flue gas stream to flow through the aperture of porous firebreak, due to resistance Effect, keeps vertical flow of flue gas direction air-flow velocity more balanced, and increase disturbance of the air-flow in furnace, to make to hang down in burner hearth Straight flow of flue gas direction temperature is more balanced, to improve burning ratio.

4, the porous firebreak of the utility model itself can after burning flue gas pass through wall hole when, the one of flue gas Partial heat stays on wall, when have do not burn complete VOC by hole when, contact with hole and heated by hole, promote VOC Secondary burning plays the role of catalyst.

Detailed description of the invention

Fig. 1 is the waste gas combustion furnace structural schematic diagram with built-in porous firebreak.

Fig. 2 is the A-A sectional view of Fig. 1 (using standard refractory brick).

Fig. 3 is the A-A sectional view of Fig. 1 (using the porous refractory brick of customization size).

Gas stream in the stove branch schematic diagram when Fig. 4 is without porous firebreak.

Fig. 5 is gas stream in the stove branch schematic diagram when having porous firebreak.

Heat radiation schematic diagram in furnace when Fig. 6 is without porous firebreak.

Fig. 7 is heat radiation schematic diagram in furnace when having porous firebreak.

In figure: 1, burner, 2, VOC air inlet, 3, burner hearth, 4, porous firebreak, 5, burn after exhanst gas outlet.

Specific embodiment

The utility model is further described through with reference to the accompanying drawing.

As shown in Figure 1-3, a kind of waste gas combustion furnace with built-in porous firebreak, including VOC air inlet 2, burner 1, Exhanst gas outlet 5 after burner hearth 3, porous firebreak 4 and burning, the burner 1 are mounted on the right side of burner hearth 3, the VOC air inlet Mouth 2 is mounted on the upper right side of burner hearth 3, and exhanst gas outlet 5 is mounted on the left side of burner hearth 3 after the burning, leans in the burner hearth 3 One of porous firebreak 4 of setting at exhanst gas outlet 5 after nearly burning.

Further, the porous firebreak 4 is the standard refractory brick masonry wall uniformly distributed at hole.

Further, the porous firebreak 4 is that the porous refractory per se with uniformly distributed aperture of customization size is brick Wall is built up, hole of no longer boxing out between porous refractory brick and porous refractory brick.

If using standard refractory brick, as shown in Fig. 2, uniformly indwelling is some between brick and brick when building makes wall two sides The hole communicated, the hydraulic diameter size of hole are not more than 100mm, and hole spacing is not more than 400mm.If hydraulic diameter mistake Greatly, it will lead to excessive heat radiation and be lost to exhanst gas outlet side through hole.If hole spacing is excessive to will lead to air flow method not Equilibrium can also make pore quantity very little, and the sum of all hole areas are too small, cause gas flow rate too low, influence burner hearth exhaust, make At furnace pressure superelevation, there are flame reverse irrigation and risk of explosion.

If using the porous refractory brick of customization size, as shown in figure 3, not interspacing between brick and brick when building.It is fixed Refractory brick processed side length itself is not more than 400mm, and aperture is evenly arranged on brick, and hole diameter is not less than 10mm, aperture and aperture Between wall thickness be preferably not less than the half of hole diameter, wall thickness is not less than the half of hole diameter at aperture back gauge brick outer wall side.It is fixed Brickmaking side length, which is greater than 400mm, will cause that brick body product is big, weight is big, constructional difficulties.Aperture, which is less than 10mm, will lead to airflow channel mistake Small, resistance is excessive.Aperture partition be easy to cause brick to crack or burn down thicker than the small intensity that will affect brick itself；Aperture back gauge The excessively thin intensity that also will affect brick of wall thickness at brick outer wall side.

As shown in figure 4, arrow indicates the branch of gas stream in the stove when without porous firebreak in figure, air-flow is illustrated in the direction of arrow The size in direction, arrow illustrates air-flow velocity.It can be seen from the figure that VOC gas after flame contact by flame with directly being formed High-speed flow band come out of the stove outer, residing time in furnace is short, causes to burn incomplete.1 flame speed of incinerator burner is generally per second 50-100 meters or so, for 6 meters of long stoves, VOC between 0.06-0.12 seconds, can not be reacted in residing time in furnace Completely.

As shown in figure 5, arrow indicates the branch of gas stream in the stove when without porous firebreak in figure, air-flow is illustrated in the direction of arrow The size in direction, arrow illustrates air-flow velocity.It can be seen from the figure that VOC gas with after flame contact by flame formed height Fast air-flow encounters in most of air-flow rebound after porous firebreak 4 melts down with flow forward, in furnace with later air-flow phase Mutually disturbance, increases the temperature uniformity of residence time and VOC gas of the VOC gas in furnace, prevents from the farther away gas of flame Body cannot be heated effectively.And small part VOC gas pass through the hole on wall, due to drag effect, speed can lower, and make it It is longer in residing time in furnace.

As shown in fig. 6, arrow indicates the distribution of heat radiation in furnace when without porous firebreak in figure, due to no porous gear fire The blocking of wall, most heat radiation have been arrived outside furnace by exhanst gas outlet, without VOC gas in effective heating furnace.

As shown in fig. 7, arrow indicates the distribution of heat radiation in furnace when porous firebreak in figure, due to there is porous firebreak Blocking, most of heat radiation all stayed in furnace, and the heat radiation that only small part is parallel to aperture on wall can pass through aperture It passes to outside furnace, there are also in sub-fraction heat radiation to aperture, but since angle changing rate is big, cannot be radiated outside furnace, it is finally small Hole hole wall absorbs.This partial heat passes to VOC from aperture when VOC gas are through small holes, further heats VOC and promotes it Secondary response.

The utility model is not limited to the present embodiment, any equivalent concepts in the technical scope that the utility model discloses Or change, it is classified as the protection scope of the utility model.

Claims (6)

1. a kind of waste gas combustion furnace with built-in porous firebreak, it is characterised in that: including burner (1), VOC air inlet (2), Exhanst gas outlet (5) after burner hearth (3), porous firebreak (4) and burning, the burner (1) are mounted on the right side of burner hearth (3), institute The VOC air inlet (2) stated is mounted on the upper right side of burner hearth (3), and exhanst gas outlet (5) is mounted on burner hearth (3) after the burning Left side, in the burner hearth (3) after burning setting porous firebreak (4) together at exhanst gas outlet (5).

2. a kind of waste gas combustion furnace with built-in porous firebreak according to claim 1, it is characterised in that: described Porous firebreak (4) is the standard refractory brick masonry wall uniformly distributed at hole.

3. a kind of waste gas combustion furnace with built-in porous firebreak according to claim 1, it is characterised in that: described Porous firebreak (4) be customize size the porous refractory per se with uniformly distributed aperture it is brick build up wall, porous refractory brick and more It no longer boxes out between the refractory brick of hole hole.

4. a kind of waste gas combustion furnace with built-in porous firebreak according to claim 1, it is characterised in that: described Porous firebreak (4) by standard refractory brick masonry at hole uniformly distributed wall when, the hydraulic diameter of hole is not more than 100mm, hole Spacing is not more than 400mm.

5. a kind of waste gas combustion furnace with built-in porous firebreak according to claim 1, it is characterised in that: described Porous firebreak (4) by the fire resisting brick masonry per se with uniformly distributed aperture of the size customized at wall when, customize refractory brick itself Side length is not more than 400mm, and aperture is evenly arranged on brick, and hole diameter is not less than 10mm, and wall thickness is not small between aperture and aperture Wall thickness is not less than the half of hole diameter at the half of hole diameter, aperture back gauge brick outer wall side.

6. a kind of waste gas combustion furnace with built-in porous firebreak according to claim 1, it is characterised in that: described The area of porous firebreak (4) is identical as burner hearth (3) cross-sectional area at masonry.