阅读说明：本技术 危险废物回转窑焚烧工艺系统 (Hazardous waste rotary kiln incineration process system ) 是由 陈星星 黄伟兵 邓湘林 李书焱 李龙钰 罗云 戴康海 黄成� 魏蜀吴 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种危险废物回转窑焚烧工艺系统,包括料斗、混料器、高温料仓、圆盘给料机、回转窑、双流收尘机构、脱硫塔和排烟筒；多个料斗的出口与混料器连接,多个料斗内分别盛装有废渣、瓦斯灰、煤渣,混料器的出口端通过皮带输送机构与高温料仓连接,高温料仓的出料端与圆盘给料机连接,圆盘给料机的出口端与回转窑的窑首端连接,回转窑的窑尾端设有出渣口和烟气出口,烟气出口与双流收尘机构连接,双流收尘机构的出口端通过管道与脱硫塔连接,脱硫塔通过管道与排烟筒连接。本发明提供的危险废物回转窑焚烧工艺系统,可以很好地实现对各危险固体废物的无废渣排放,即无害化处理,也可以很好地实现烟气中的烟尘分离和沉降。(The invention discloses a rotary kiln incineration process system for hazardous wastes, which comprises a hopper, a mixer, a high-temperature bin, a disc feeder, a rotary kiln, a double-flow dust collection mechanism, a desulfurizing tower and a smoke exhaust cylinder, wherein the rotary kiln is arranged on the hopper; the export and the blender of a plurality of hoppers are connected, the waste residue has been held respectively in a plurality of hoppers, the gas ash, the cinder, the exit end of blender passes through belt conveyor and is connected with the high temperature feed bin, the discharge end and the disk feeder of high temperature feed bin are connected, the exit end and the kiln head end of rotary kiln of disk feeder are connected, the kiln tail end of rotary kiln is equipped with slag notch and exhanst gas outlet, exhanst gas outlet and double-flow mechanism of gathering dust are connected, double-flow mechanism of gathering dust's exit end passes through the pipeline and is connected with the desulfurizing tower, the desulfurizing tower passes through the pipeline and is connected with the chimney. The rotary kiln incineration process system for hazardous wastes provided by the invention can well realize the waste residue-free discharge, i.e. harmless treatment, of various hazardous solid wastes, and can also well realize the separation and sedimentation of smoke dust in flue gas.)

1. A rotary kiln incineration process system for hazardous wastes is characterized by comprising a hopper, a mixer, a high-temperature bin, a disc feeder, a rotary kiln, a double-flow dust collection mechanism, a desulfurizing tower and a smoke exhaust cylinder;

the outlets of the hoppers are connected with the mixer, waste residue, gas ash and coal slag are respectively contained in the hoppers, the outlet end of the mixer is connected with the high-temperature bin through the belt conveying mechanism, the discharge end of the high-temperature bin is connected with the disc feeder, the outlet end of the disc feeder is connected with the kiln head end of the rotary kiln, the kiln tail end of the rotary kiln is provided with a slag outlet and a flue gas outlet, the flue gas outlet is connected with the double-flow dust collecting mechanism, the outlet end of the double-flow dust collecting mechanism is connected with the desulfurizing tower through a pipeline, the desulfurizing tower is connected with the smoke exhaust tube through a pipeline,

the double-flow dust collecting mechanism comprises a smoke dust collecting box, double-flow dust collecting main plates and dust collecting hoppers, wherein an inlet and an outlet of the smoke collecting box are respectively connected with a kiln tail end of a rotary kiln and a desulfurization tower, the double-flow dust collecting main plates are arranged inside the smoke collecting box, the dust collecting hoppers are communicated below the smoke collecting box, the double-flow dust collecting main plates are provided with 6 double-flow dust collecting main plates, each double-flow dust collecting main plate is composed of a bottom plate and a plurality of groups of trapezoidal corrugated dust collecting plates which are sequentially and longitudinally arranged on the bottom plate in parallel, each group of trapezoidal corrugated dust collecting plates comprises 2 trapezoidal corrugated dust collecting plates which are separated by gaps and arranged in parallel, a top plate of each trapezoidal corrugated dust collecting plate extends downwards to be provided with a dust collecting bayonet plate and the dust collecting bayonet plate is not contacted with the adjacent trapezoidal corrugated dust collecting plates, a smoke bending collecting plate and a smoke bending collecting plate are arranged in parallel in a downward extending manner in the middle part of the inner wall of an upper side plate of each trapezoidal corrugated dust collecting plate and are not contacted with a lower side plate of the trapezoidal corrugated dust collecting plate, the bottom side wall of the front end trapezoid corrugated dust collecting plate in each group of trapezoid corrugated dust collecting plates is provided with a smoke passage opening, 4 double-flow dust collecting total plates are respectively arranged on four inner side walls of the smoke dust collecting box, 2 double-flow dust collecting total plates are arranged in a V shape and connected together, and the 2 double-flow dust collecting total plates which are in the V shape are arranged on the inner top wall of the smoke dust collecting box and face downwards.

2. The rotary kiln hazardous waste incineration process system of claim 1, wherein a flood dragon conveyor is provided in the outlets of the plurality of hoppers.

3. The rotary kiln hazardous waste incineration process system as claimed in claim 1, wherein bottom plates of 4 double-flow dust collection header plates are respectively arranged on four inner side walls of the flue gas dust collection box.

4. The rotary kiln hazardous waste incineration process system as claimed in claim 1, wherein one end bottom plate of the 2 double-flow dust collection header plates in the V-shape is arranged on the inner top wall of the flue gas dust collection box, and the other end bottom plates are connected with each other.

5. The rotary kiln incineration process system for hazardous wastes according to claim 1, wherein the trapezoidal corrugated dust collecting plate is formed by continuously connecting a plurality of longitudinal isosceles trapezoidal plates.

6. The rotary kiln hazardous waste incineration process system according to claim 1, wherein an induced draft fan is arranged on a pipeline between the double-flow dust collecting mechanism and the desulfurizing tower; and an induced draft fan can be arranged on a pipeline between the desulfurizing tower and the smoke exhaust tube.

7. The rotary kiln hazardous waste incineration process system as claimed in claim 1, wherein the lower side plates at the bottoms of 2 trapezoidal corrugated dust collecting plates in each group of trapezoidal corrugated dust collecting plates are all provided with smoke passage openings.

8. The rotary kiln incineration process system for hazardous wastes according to any one of claims 1 to 7, wherein each smoke bending and gathering plate on the trapezoidal corrugated dust collecting plate and the adjacent upper side plate and top plate thereof form a smoke bending and gathering area, each upper side plate on the trapezoidal corrugated dust collecting plate is provided with a clamping opening, a refrigeration material bag is arranged on each clamping opening in a penetrating manner, and the refrigeration material bag extends into the smoke bending and gathering area.

Technical Field

The invention relates to the technical field of hazardous waste treatment equipment, in particular to a rotary kiln incineration process system for hazardous waste.

Background

Rotary kiln incinerators, also known as rotary kilns, have evolved from rotary cement kilns. The main body is a rotatable horizontal cylindrical shell, and the shell is made of steel plates and is lined with refractory materials.

The working principle of the rotary kiln incinerator is as follows: incineration is a high-temperature heat treatment technology, and is a technology capable of realizing harmless treatment of wastes, wherein toxic and harmful substances are oxidized, pyrolyzed and destroyed at the high temperature of 800-1200 ℃ in a combustion reaction with a certain amount of excess air and an organic waste incinerator. The high-temperature incineration in the rotary kiln can treat not only solid wastes, but also wastewater and waste gas; it can also treat general industrial waste and hazardous waste.

When the rotary kiln incinerator is applied to a treatment system of general industrial waste and hazardous waste, how to develop a rotary kiln incineration process system of hazardous waste, which can realize the non-waste residue discharge and harmless disposal process of solid waste is a problem to be solved urgently.

Disclosure of Invention

In view of the above, the invention provides a rotary kiln incineration process system for hazardous wastes.

In order to achieve the purpose, the invention adopts the following technical scheme:

a rotary kiln incineration process system for hazardous wastes comprises a hopper, a mixer, a high-temperature bin, a disc feeder, a rotary kiln, a double-flow dust collection mechanism, a desulfurization tower and a smoke discharge cylinder;

the outlets of the hoppers are connected with the mixer, waste residue, gas ash and coal slag are respectively contained in the hoppers, the outlet end of the mixer is connected with the high-temperature bin through the belt conveying mechanism, the discharge end of the high-temperature bin is connected with the disc feeder, the outlet end of the disc feeder is connected with the kiln head end of the rotary kiln, the kiln tail end of the rotary kiln is provided with a slag outlet and a flue gas outlet, the flue gas outlet is connected with the double-flow dust collecting mechanism, the outlet end of the double-flow dust collecting mechanism is connected with the desulfurizing tower through a pipeline, the desulfurizing tower is connected with the smoke exhaust tube through a pipeline,

the double-flow dust collecting mechanism comprises a smoke dust collecting box, double-flow dust collecting main plates and dust collecting hoppers, wherein an inlet and an outlet of the smoke collecting box are respectively connected with a kiln tail end of a rotary kiln and a desulfurization tower, the double-flow dust collecting main plates are arranged inside the smoke collecting box, the dust collecting hoppers are communicated below the smoke collecting box, the double-flow dust collecting main plates are provided with 6 double-flow dust collecting main plates, each double-flow dust collecting main plate is composed of a bottom plate and a plurality of groups of trapezoidal corrugated dust collecting plates which are sequentially and longitudinally arranged on the bottom plate in parallel, each group of trapezoidal corrugated dust collecting plates comprises 2 trapezoidal corrugated dust collecting plates which are separated by gaps and arranged in parallel, a top plate of each trapezoidal corrugated dust collecting plate extends downwards to be provided with a dust collecting bayonet plate and the dust collecting bayonet plate is not contacted with the adjacent trapezoidal corrugated dust collecting plates, a smoke bending collecting plate and a smoke bending collecting plate are arranged in parallel in a downward extending manner in the middle part of the inner wall of an upper side plate of each trapezoidal corrugated dust collecting plate and are not contacted with a lower side plate of the trapezoidal corrugated dust collecting plate, the bottom side wall of the front end trapezoid corrugated dust collecting plate in each group of trapezoid corrugated dust collecting plates is provided with a smoke passage opening, 4 double-flow dust collecting total plates are respectively arranged on four inner side walls of the smoke dust collecting box, 2 double-flow dust collecting total plates are arranged in a V shape and connected together, and the 2 double-flow dust collecting total plates which are in the V shape are arranged on the inner top wall of the smoke dust collecting box and face downwards.

Preferably, flood dragon conveying devices are arranged in outlets of the hoppers.

Preferably, the bottom plates of the 4 double-flow dust collecting main plates are respectively arranged on four side walls in the smoke dust collecting box.

Preferably, one end bottom plate of the V-shaped 2 double-flow dust collection header plates is arranged on the inner top wall of the smoke dust collection box, and the other end bottom plates are connected with each other.

Preferably, the trapezoidal corrugated dust collecting plate is formed by continuously connecting a plurality of longitudinal isosceles trapezoidal plates.

Preferably, an induced draft fan can be arranged on a pipeline between the double-flow dust collecting mechanism and the desulfurizing tower; and an induced draft fan can be arranged on a pipeline between the desulfurizing tower and the smoke exhaust tube.

Preferably, smoke and dust channel openings are formed in lower side plates at the bottoms of 2 trapezoidal corrugated dust collecting plates in each group of trapezoidal corrugated dust collecting plates.

Preferably, each smoke and dust collecting plate of bending on the trapezoidal corrugated dust collecting plate and adjacent upper side plate and top plate thereof constitute a smoke and dust collecting area of bending, a clamping opening is formed in each upper side plate on the trapezoidal corrugated dust collecting plate, a refrigeration material bag is arranged on the clamping opening in a penetrating manner, and the refrigeration material bag extends into the smoke and dust collecting area of bending.

Compared with the prior art, the invention has the beneficial effects that:

(1) the solid waste meeting or meeting the kiln entering requirement after being pretreated is put into a cement kiln, and the harmless treatment process of the solid waste is realized while cement clinker production is carried out by utilizing the characteristics of high temperature, long-time gas retention, large heat capacity, good thermal stability, alkaline environment, no waste residue discharge and the like in a cement rotary kiln;

(2) the double-flow dust collecting mechanism can well settle dust in the flue gas and collect the dust in the dust collecting hopper, thereby achieving a good dust and dust separating effect.

Drawings

FIG. 1 is an overall flow chart of the present invention.

Fig. 2 is a schematic view of the overall structure of the present embodiment 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 3.

Fig. 5 is a schematic view of the overall structure of the present embodiment 2.

Fig. 6 is an enlarged view of a portion C in fig. 5.

Fig. 7 is an enlarged view of a portion D in fig. 6.

In the figure: 1. a hopper; 2. a mixer; 3. a high-temperature storage bin; 4. a disc feeder; 5. a rotary kiln; 6. a desulfurizing tower; 7. a smoke exhaust tube; 8. a belt conveying mechanism; 9. a slag outlet; 10. an induced draft fan; 11. a dust collection box; 12. a dust collection hopper; 13. a base plate; 14. a trapezoidal corrugated dust collecting plate; 15. a dust collecting bayonet plate; 16. bending the collecting plate by smoke dust; 17. a smoke passage opening; 18. a refrigeration material bag.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-4, a rotary kiln incineration process system for hazardous wastes comprises a hopper 1, a mixer 2, a high-temperature bin 3, a disc feeder 4, a rotary kiln 5, a double-flow dust collection mechanism, a desulfurizing tower 6 and a smoke exhaust pipe 7.

The outlets of the plurality of hoppers 1 are connected with the mixer 2, and the plurality of hoppers 1 are respectively filled with waste residues, gas ash and coal slag; a flood dragon conveying device is arranged in outlets of the plurality of hoppers 1, waste residues, gas ash and coal slag are conveyed into the mixer 2, the waste residues, the gas ash and the coal slag are conveyed into the high-temperature bin 3 through the belt conveying mechanism 8 by the outlet end of the mixer 2 after mixing, the discharge end of the high-temperature bin 3 is connected with the disc feeder 4, the outlet end of the disc feeder 4 is connected with the kiln head end of the rotary kiln 5, the kiln tail end of the rotary kiln 5 is provided with a slag outlet 9 and a smoke outlet, the smoke outlet is connected with the double-flow dust collecting mechanism, the outlet end of the double-flow dust collecting mechanism is connected with the desulfurizing tower 6 through a pipeline, and the pipeline can be provided with an induced draft fan 10; the desulfurizing tower 6 is connected with the smoke exhaust tube 7 through a pipeline, and an induced draft fan can be arranged on the pipeline.

The double-flow dust collecting mechanism comprises a smoke dust collecting box 11, a double-flow dust collecting main plate and a dust collecting hopper 12, wherein an inlet and an outlet of the smoke collecting box 11 are respectively connected with the kiln tail end of the rotary kiln 5 and the desulfurizing tower 6, the double-flow dust collecting main plate is arranged inside the smoke collecting box 11, and the dust collecting hopper 12 is communicated below the smoke collecting box 11.

The double-flow dust collecting main plate comprises 6 double-flow dust collecting main plates, wherein each double-flow dust collecting main plate comprises a bottom plate 13 and a plurality of groups of trapezoidal corrugated dust collecting plates 14 which are sequentially and longitudinally arranged on the bottom plate in parallel.

Each group of trapezoidal corrugated dust collecting plates comprises 2 trapezoidal corrugated dust collecting plates 14 which are separated by gaps and arranged in parallel, each trapezoidal corrugated dust collecting plate 14 is formed by continuously connecting a plurality of longitudinal isosceles trapezoidal plates, and the top plate of each trapezoidal corrugated dust collecting plate 14 extends downwards to form a dust collecting bayonet plate 15 and the dust collecting bayonet plate 15 does not contact with the adjacent trapezoidal corrugated dust collecting plates. The middle part of the inner wall of the upper side plate of each trapezoidal corrugated dust collecting plate 14 extends downwards to be provided with a smoke dust bending collecting plate 16, the smoke dust bending collecting plate 16 does not contact with the lower side plate of the trapezoidal corrugated dust collecting plate, and a smoke dust channel opening 17 is formed in the lower side plate at the bottom of the trapezoidal corrugated dust collecting plate at the front end in each group of trapezoidal corrugated dust collecting plates 14 (or smoke dust channel openings 17 are formed in the lower side plates at the bottom of 2 trapezoidal corrugated dust collecting plates in each group of trapezoidal corrugated dust collecting plates 14).

Bottom plates 13 of the 4 double-flow dust collecting main plates are respectively arranged on four inner side walls of the smoke dust collecting box 11, so that the 4 double-flow dust collecting main plates are respectively arranged on four inner side walls of the smoke dust collecting box 11. 2 double-flow total boards that gather dust are the V-arrangement and link together, and the one end bottom plate 13 of 2 double-flow total boards that gather dust that are the V-arrangement is located on the interior roof of flue gas dust collecting box 11, other end bottom plate 13 interconnect to 2 double-flow total boards that are the V-arrangement are located on the interior roof of flue gas dust collecting box 11 and its trapezoidal ripple board 14 that gathers dust downwards.

The working principle of the invention is as follows:

uniformly mixing various waste residues and coal in proportion to obtain a mixture suitable for smelting in a rotary kiln;

conveying the mixture to a high-temperature bin through a belt, uniformly adding the mixture into a rotary kiln through a disc feeder, blowing air, heating and smelting to ensure that metal in the mixture is reduced into metal steam by carbon and carbon monoxide, oxidizing the metal steam by oxygen in the air, enabling valuable metals such as zinc and the like to exist in smelting smoke in a smoke form, cooling the high-temperature smoke, then feeding the cooled high-temperature smoke into a tube seat, and then passing through a double-flow dust collection mechanism to obtain secondary zinc oxide products from the collected smoke; the flue gas after dust collection is discharged after reaching the standard after desulfurization, and the kiln slag is sold to downstream enterprises as a byproduct after water extraction;

the double-flow dust collecting mechanism can play a good dust settling effect, and specifically comprises: the flue gas enters the trapezoidal corrugated dust collecting plate 14 at the front end and moves upwards in a winding manner along the trapezoidal corrugated dust collecting plate 14 at the front end, or the flue gas enters 2 trapezoidal corrugated dust collecting plates 14 from a flue gas passage opening 17 and moves upwards in a winding manner along the 2 trapezoidal corrugated dust collecting plates 14, and due to the existence of wave crests and wave troughs, dust can slide down along the trapezoidal corrugated dust collecting plates 14 due to gravity settling and fall into the dust collecting hopper 12;

the dust collection bayonet plate 15 plays a role in: an area for bending and gathering the smoke dust is provided, so that the smoke dust can be settled better; the soot bend collector plate 16 functions as: and a region for bending and gathering smoke dust is also provided, and the region for bending and gathering smoke dust formed by the dust collection bayonet plate 15 and the region for bending and gathering smoke dust form two sides and a double region for bending and gathering smoke dust, so that the smoke dust can be settled down to the largest extent and fall into the dust collection hopper 12.

Example 2:

referring to fig. 1 and 5-7, the rotary kiln incineration process system for hazardous wastes comprises a hopper 1, a mixer 2, a high-temperature bin 3, a disc feeder 4, a rotary kiln 5, a double-flow dust collection mechanism, a desulfurizing tower 6 and a smoke exhaust pipe 7.

The outlets of the plurality of hoppers 1 are connected with the mixer 2, and the plurality of hoppers 1 are respectively filled with waste residues, gas ash and coal slag; a flood dragon conveying device is arranged in outlets of the plurality of hoppers 1, waste residues, gas ash and coal slag are conveyed into the mixer 2, the waste residues, the gas ash and the coal slag are conveyed into the high-temperature bin 3 through the belt conveying mechanism 8 by the outlet end of the mixer 2 after mixing, the discharge end of the high-temperature bin 3 is connected with the disc feeder 4, the outlet end of the disc feeder 4 is connected with the kiln head end of the rotary kiln 5, the kiln tail end of the rotary kiln 5 is provided with a slag outlet 9 and a smoke outlet, the smoke outlet is connected with the double-flow dust collecting mechanism, the outlet end of the double-flow dust collecting mechanism is connected with the desulfurizing tower 6 through a pipeline, and the pipeline can be provided with an induced draft fan 10; the desulfurizing tower 6 is connected with the smoke exhaust tube 7 through a pipeline, and an induced draft fan can be arranged on the pipeline.

The double-flow dust collecting mechanism comprises a smoke dust collecting box 11, a double-flow dust collecting main plate and a dust collecting hopper 12, wherein an inlet and an outlet of the smoke collecting box 11 are respectively connected with the kiln tail end of the rotary kiln 5 and the desulfurizing tower 6, the double-flow dust collecting main plate is arranged inside the smoke collecting box 11, and the dust collecting hopper 12 is communicated below the smoke collecting box 11.

The double-flow dust collecting main plate comprises 6 double-flow dust collecting main plates, wherein each double-flow dust collecting main plate comprises a bottom plate 13 and a plurality of groups of trapezoidal corrugated dust collecting plates 14 which are sequentially and longitudinally arranged on the bottom plate in parallel.

Each group of trapezoidal corrugated dust collecting plates comprises 2 trapezoidal corrugated dust collecting plates 14 which are separated by gaps and arranged in parallel, each trapezoidal corrugated dust collecting plate 14 is formed by continuously connecting a plurality of longitudinal isosceles trapezoidal plates, and the top plate of each trapezoidal corrugated dust collecting plate 14 extends downwards to form a dust collecting bayonet plate 15 and the dust collecting bayonet plate 15 does not contact with the adjacent trapezoidal corrugated dust collecting plates. The middle part of the inner wall of the upper side plate of each trapezoidal corrugated dust collecting plate 14 extends downwards to be provided with a smoke dust bending collecting plate 16, the smoke dust bending collecting plate 16 does not contact with the lower side plate of the trapezoidal corrugated dust collecting plate, and a smoke dust channel opening 17 is formed in the lower side plate at the bottom of the trapezoidal corrugated dust collecting plate at the front end in each group of trapezoidal corrugated dust collecting plates 14 (or smoke dust channel openings 17 are formed in the lower side plates at the bottom of 2 trapezoidal corrugated dust collecting plates in each group of trapezoidal corrugated dust collecting plates 14).

Bottom plates 13 of the 4 double-flow dust collecting main plates are respectively arranged on four inner side walls of the smoke dust collecting box 11, so that the 4 double-flow dust collecting main plates are respectively arranged on four inner side walls of the smoke dust collecting box 11. 2 double-flow total boards that gather dust are the V-arrangement and link together, and the one end bottom plate 13 of 2 double-flow total boards that gather dust that are the V-arrangement is located on the interior roof of flue gas dust collecting box 11, other end bottom plate 13 interconnect to 2 double-flow total boards that are the V-arrangement are located on the interior roof of flue gas dust collecting box 11 and its trapezoidal ripple board 14 that gathers dust downwards.

Each smoke dust bending gathering plate 16 on the trapezoidal corrugated dust collecting plate 14, and an upper side plate and a top plate adjacent to the smoke dust bending gathering plate form a smoke dust bending gathering area, a clamping opening is formed in each upper side plate on the trapezoidal corrugated dust collecting plate 14, a refrigeration material bag 18 penetrates through the clamping opening, and the refrigeration material bag 18 extends into the smoke dust bending gathering area.

The working principle of the invention is as follows:

uniformly mixing various waste residues and coal in proportion to obtain a mixture suitable for smelting in a rotary kiln;

conveying the mixture to a high-temperature bin through a belt, uniformly adding the mixture into a rotary kiln through a disc feeder, blowing air, heating and smelting to ensure that metal in the mixture is reduced into metal steam by carbon and carbon monoxide, oxidizing the metal steam by oxygen in the air, enabling valuable metals such as zinc and the like to exist in smelting smoke in a smoke form, cooling the high-temperature smoke, then feeding the cooled high-temperature smoke into a tube seat, and then passing through a double-flow dust collection mechanism to obtain secondary zinc oxide products from the collected smoke; the flue gas after dust collection is discharged after reaching the standard after desulfurization, and the kiln slag is sold to downstream enterprises as a byproduct after water extraction;

the double-flow dust collecting mechanism can play a good dust settling effect, and specifically comprises: the flue gas enters the trapezoidal corrugated dust collecting plate 14 at the front end and moves upwards in a winding manner along the trapezoidal corrugated dust collecting plate 14 at the front end, or the flue gas enters 2 trapezoidal corrugated dust collecting plates 14 from a flue gas passage opening 17 and moves upwards in a winding manner along the 2 trapezoidal corrugated dust collecting plates 14, and due to the existence of wave crests and wave troughs, dust can slide down along the trapezoidal corrugated dust collecting plates 14 due to gravity settling and fall into the dust collecting hopper 12;

the dust collection bayonet plate 15 plays a role in: an area for bending and gathering the smoke dust is provided, so that the smoke dust can be settled better; the soot bend collector plate 16 functions as: a region for bending and gathering smoke dust is also provided, and forms a region for bending and gathering smoke dust on two sides and dual-purpose bending and gathering smoke dust together with a region for bending and gathering smoke dust formed by the dust collection bayonet plate 15, so that the smoke dust can be settled down as much as possible and fall into the dust collection hopper 12;

the effect of refrigeration material package 18 lies in, plays the flue gas table cold, with the effect that whole double-flow total board that gathers dust cools off, more is favorable to realizing the separation and the settlement of flue gas and dirt, falls into again to dust collecting hopper 12, and refrigeration material package 18's mounting means, convenient to detach, change and maintenance.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.