CN210638046U - Chain furnace type fly ash pre-burning melting device - Google Patents
Chain furnace type fly ash pre-burning melting device Download PDFInfo
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- CN210638046U CN210638046U CN201921648897.3U CN201921648897U CN210638046U CN 210638046 U CN210638046 U CN 210638046U CN 201921648897 U CN201921648897 U CN 201921648897U CN 210638046 U CN210638046 U CN 210638046U
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Abstract
The utility model provides a chain grate type flying ash pre-burning melting device, which comprises a pre-burning furnace and a melting furnace which are arranged on the left and the right and are communicated with each other, wherein a chain grate is arranged in the pre-burning furnace, a feed inlet is arranged on the pre-burning furnace above the chain grate, an ash discharge hopper is arranged at the bottom of the pre-burning furnace, and the tail end of the chain grate is positioned at the communicating part of the pre-burning furnace and the melting furnace; the melting furnace is internally provided with at least one combustion nozzle and a smoke exhaust pipe, and the bottom of the melting furnace is provided with a slag discharge port. The utility model discloses a particulate material who makes flying dust and modifier mixture forms the vitreous body residue that the rerum natura is stable through precombustion and melting respectively, solves the flying dust and handles difficult problem, and tail gas, the flue gas waste heat of each link of rational utilization simultaneously reach energy saving and emission reduction's purpose.
Description
Technical Field
The utility model relates to a chain furnace type flying ash pre-burning melting device.
Background
The fly ash is residual substances collected by a domestic garbage incineration flue gas purification system, and the domestic garbage incineration fly ash belongs to dangerous waste according to national records of dangerous waste because the fly ash contains toxic substances such as dioxin, heavy metals and the like which are not suitable for decomposition. With the rapid development of waste incineration treatment, the yield of incineration fly ash is huge, and how to safely, stably and efficiently dispose the fly ash is an urgent problem to be solved.
At present, the fly ash disposal method mainly comprises solidification and stabilization, wherein the fly ash is separately buried in different regions after reaching the standard of domestic garbage landfill yard entrance, and a small part of the fly ash is disposed by adopting a cement kiln in a synergic manner. The fly ash generated by burning the household garbage has complex physical property and serious harm, and the disposal technical route of the fly ash must be designed globally and systematically and carefully to control risks. The conventional disposal method inevitably has some problems:
(1) occupies a large amount of storage capacity of the domestic garbage landfill. As the fly ash is produced in a large amount, the storage capacity of the domestic garbage sanitary landfill site built in China is gradually difficult to meet the requirement of storing newly-added solidified and stabilized fly ash. Meanwhile, the increasingly higher fly ash entrance treatment cost increases the fly ash treatment cost of the household garbage incineration enterprises.
(2) Increasing the potential risk of environmental pollution. At present, the fly ash is buried after being stably solidified, the environmental risk of the fly ash is not completely eliminated, the mobility of harmful substances is reduced to a certain degree, and the long-term stability of the stable solidification of the fly ash is still controversial under the action of environmental slow release.
(3) For the co-processing of fly ash in a cement kiln, due to the limitation of the cement kiln process, the requirement of product quality and the difference of cement production capacity conditions in the area, the co-processing capability of fly ash is limited from the whole industry, and the huge requirement of the processing and processing of fly ash from incineration of household garbage is difficult to meet. Meanwhile, most heavy metals with strong toxicity, such as lead, cadmium, mercury and the like in the fly ash are solidified in the cement product, so that the risk of releasing the heavy metals to the environment is increased. Meanwhile, when the cement product becomes construction waste, the construction waste containing a large amount of heavy metals further increases the burden of treatment.
SUMMERY OF THE UTILITY MODEL
The utility model provides a melting device is burnt in advance to chain grate type flying dust, through the granular materials who makes flying dust and modifier mixture respectively through burning in advance and melting, turn into stable vitreous body residue with the harmful substance in the flying dust, eliminate the environmental risk of flying dust, solve the flying dust and handle difficult problem, tail gas, the flue gas waste heat of each link of rational utilization simultaneously reaches energy saving and emission reduction's purpose.
The technical scheme of the utility model is realized like this:
a kind of chain grate type fly ash pre-burning melting apparatus, including setting up and communicating pre-combustion furnace 1 and melting furnace 2 each other left and right, there are chain grates 14 in the said pre-combustion furnace 1, there are feed inlets 8 on the pre-combustion furnace 1 above the said chain grate 14, there are ash hoppers 11 at the bottom of the said pre-combustion furnace 1, the end of the said chain grate 14 is in the communicating part of pre-combustion furnace 1 and melting furnace 2; at least one combustion nozzle 21 and at least one smoke exhaust pipe 22 are arranged in the melting furnace 2, and a slag discharge port 24 is arranged at the bottom of the melting furnace 2.
Preferably, the communicating part of the pre-combustion furnace 1 and the melting furnace 2 is an inclined connecting channel which is inclined downwards, the higher end of the inclined connecting channel is communicated with the pre-combustion furnace 1, the lower end of the inclined connecting channel is communicated with the melting furnace 2, and the tail end of the traveling grate 14 is positioned above the higher end of the inclined connecting channel of the communicating part.
Preferably, the device further comprises an air inlet pipe 5, wherein one end of the air inlet pipe 5 is provided with a blower 6, and the other end of the air inlet pipe 5 is communicated to the inside of the pre-combustion furnace 1.
Preferably, the tail end of the air inlet pipe 5 is respectively provided with a first air inlet connector 12 and a second air inlet connector 13 in parallel, and an air nozzle 15 is arranged below the traveling grate 14; the first air inlet port 12 is arranged in the pre-combustion furnace 1 and above the traveling grate 14, the second air inlet port 13 is connected to the air nozzle 15, and the air nozzle 15 faces upwards to be aligned to a chain plate with holes of the traveling grate 14.
Preferably, the top of the pre-combustion furnace 1 is communicated to a tail flue 4 through a connecting flue 3, and the tail end of the tail flue 4 is connected to a flue gas purification system through an induced draft fan 7.
Preferably, the air inlet pipe 5 at least comprises a heat exchange coil 53, a heat exchange winding pipe bundle 52 and an external connecting part 51 which are sequentially connected end to end, wherein the heat exchange coil 53 is positioned in the tail flue 4 and has at least one return stroke; the heat exchange winding tube bundle 52 is wound on the side wall of the pre-combustion furnace 1.
Preferably, the smoke exhaust pipe 22 is connected to a smoke inlet 23 in the pre-combustion furnace 1, the smoke inlet 23 is located above the traveling grate 14, and the smoke inlet 23 is located below the heat exchange winding pipe bundle 52.
The utility model discloses the beneficial effect who produces does:
(1) in the utility model, the heat exchange coil pipe is arranged through the air inlet pipe, the heat exchange winding pipe bundle is respectively arranged in the tail flue and is bent and arranged inside the pre-combustion furnace, and the winding and arrangement outside the pre-combustion furnace can realize that cold air entering from the air blower can be preheated for two times in sequence before entering the pre-combustion furnace, thereby reducing the temperature of the discharged tail gas, increasing the temperature of the air entering the pre-combustion furnace and improving the heat utilization effect of the device; on the other hand, the temperature of the heating feeding is utilized through the waste heat of the tail gas, so that the melting combustion of the raw materials in the melting furnace at the later stage is facilitated, and the energy consumption is saved.
(2) The utility model discloses in through set up the in-process that the traveling grate carries out the transportation to the raw materials in the precombustion furnace, through the air nozzle that sets up towards the link joint of traveling grate, be equipped with the hole on the link joint and conveniently ventilate, hot-air can fully contact all materials, because the feeding is graininess raw materials to in the middle of blowing in the air after will preheating into the feeding on the link joint, make the raw materials fully preheat.
(3) The utility model discloses well flying dust is at first preheated the burning through the traveling grate stoker, improves material particle temperature, then gets into the melting furnace high temperature melting, and harmful substance in the flying dust can change into stable vitreous body residue material through melting after handling, effectively eliminates the environmental risk of flying dust, solves the flying dust and handles difficult problem.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the chain grate type fly ash pre-burning melting device comprises a pre-burning furnace 1 and a melting furnace 2 which are arranged at the left and right sides and are communicated with each other, wherein a chain grate 14 is arranged in the pre-burning furnace 1, a feeding hole 8 is arranged on the pre-burning furnace 1 above the chain grate 14, an ash discharge hopper 11 is arranged at the bottom of the pre-burning furnace 1, and the tail end of the chain grate 14 is positioned at a communication part of the pre-burning furnace 1 and the melting furnace 2; at least one combustion nozzle 21 is arranged in the melting furnace 2, a smoke exhaust pipe 22 is arranged in the melting furnace 2, and a slag discharge port 24 is arranged at the bottom of the melting furnace 2.
In the embodiment, the communicating part between the pre-combustion furnace 1 and the melting furnace 2 is an inclined connecting channel which is inclined downwards, the higher end of the inclined connecting channel is communicated with the pre-combustion furnace 1, the lower end of the inclined connecting channel is communicated with the melting furnace 2, and the tail end of the traveling grate 14 is positioned above the higher end of the inclined connecting channel of the communicating part. In this way, the particulate material introduced through the inlet port 8 is preheated on the traveling grate 14 in the preburner 1 and conveyed to the melting furnace 2. Because the pre-combustion furnace 1 and the melting furnace are communicated from left to right, the pre-combustion furnace 1 is higher than the melting furnace 2, and the tail end of the chain grate 14 is positioned above the communicated part, the materials on the chain plate finally fall into the connected part, slide into the melting furnace 2 through the inclined connecting channel, and finally melt through the combustion nozzle 21, and the combustion nozzle 21 can adopt a burner, a plasma torch and the like.
The embodiment also comprises an air inlet pipe 5, wherein one end of the air inlet pipe 5 is provided with a blower 6, the other end of the air inlet pipe 5 is communicated to the inside of the pre-combustion furnace 1, the tail end of the air inlet pipe 5 is respectively provided with a first air inlet connector 12 and a second air inlet connector 13 in parallel, and an air nozzle 15 is arranged below the chain grate 14; the first air inlet port 12 is arranged in the pre-combustion furnace 1 and above the traveling grate 14, the second air inlet port 13 is connected to the air nozzle 15, and the air nozzle 15 faces upwards to be aligned to a chain plate with holes of the traveling grate 14.
The top of the pre-combustion furnace 1 is communicated to a tail flue 4 through a connecting flue 3, the tail end of the tail flue 4 is connected to a flue gas purification system through an induced draft fan 7, the air inlet pipe 5 at least comprises a heat exchange coil 53, a heat exchange winding pipe bundle 52 and an external connecting part 51 which are sequentially connected end to end, and the heat exchange coil 53 is positioned in the tail flue 4 and has at least one return stroke; the heat exchange winding tube bundle 52 is wound on the side wall of the pre-combustion furnace 1; the smoke exhaust pipe 22 is connected to a smoke inlet port 23 in the pre-combustion furnace 1, the smoke inlet port 23 is located above the traveling grate 14, and the smoke inlet port 23 is located below the heat exchange winding pipe bundle 52.
Through the design, firstly, outside air is blown into the air inlet pipe 5 through the blower 6, firstly passes through the heat exchange coil 53 positioned in the tail flue 4, and fully exchanges heat with flue gas in the tail flue 4 through the heat exchange coil 53; then, the preheated air passes through the heat exchange winding tube bundle 52, and as the heat exchange winding tube bundle 52 is wound on the upper side wall of the pre-combustion furnace 1, the temperature in the pre-combustion furnace is higher, the preheated air is heated by secondary heat exchange, and finally hot air is formed. The hot air is divided into two paths, one path enters the pre-combustion furnace 1 through the first air inlet interface 12 to be used as pre-heating combustion secondary air, and the other path is introduced into the air nozzle 15 through the second air inlet interface 13.
Because the air nozzle 15 is positioned below the chain plate and the air injection direction is upward, and the holes are formed in the chain plate of the chain grate 14, the hot air sprayed by the air nozzle can upwards pass through the holes and fully preheat all fly ash raw materials after passing through the granular raw materials, and the phenomenon of uneven preheating caused by stacking is avoided. Of course, in order to guarantee the falling and other phenomena of the materials in the blowing process, baffle blocks which are uniformly arranged can be arranged on the chain plate, so that the granular materials fall into a groove-shaped space formed by the baffles after being fed, the conveying can also advance during feeding at every time, and the uniformity of feeding is guaranteed. Of course, the present invention is not limited thereto, and any other means that can achieve the above-mentioned object should be within the scope of the present invention.
Meanwhile, when the raw materials in the melting furnace 2 are melted, the generated flue gas is discharged to the smoke inlet port 23 through the smoke exhaust pipe 22 and enters the pre-combustion furnace 1, the temperature of the flue gas in the pre-combustion furnace 1 is generally 600-800 ℃, and the temperature of the flue gas in the melting furnace 2 is generally 800-1500 ℃. Of course, the specific internal temperature can be adjusted according to actual needs and conditions, and this embodiment is only used to illustrate the temperature of the melting furnace and the pre-combustion furnace and the range of the temperature of the generated flue gas.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The pre-burning melting device for the fly ash in the chain furnace type is characterized by comprising a pre-burning furnace (1) and a melting furnace (2) which are arranged on the left and right and are communicated with each other, wherein a chain grate (14) is arranged in the pre-burning furnace (1), a feeding hole (8) is formed in the pre-burning furnace (1) above the chain grate (14), an ash discharging hopper (11) is arranged at the bottom of the pre-burning furnace (1), and the tail end of the chain grate (14) is positioned at a communication part of the pre-burning furnace (1) and the melting furnace (2); at least one combustion nozzle (21) is arranged in the melting furnace (2), a smoke exhaust pipe (22) is arranged in the melting furnace, and a slag discharge port (24) is arranged at the bottom of the melting furnace (2).
2. The pre-combustion melting device of the fly ash of the chain grate furnace type as set forth in claim 1, wherein the communicating portion between the pre-combustion furnace (1) and the melting furnace (2) is an inclined connecting passage inclined downward, the higher end of the inclined connecting passage is communicated with the pre-combustion furnace (1), the lower end of the inclined connecting passage is communicated with the melting furnace (2), and the end of the chain grate (14) is located above the higher end of the inclined connecting passage.
3. The pre-burning melting apparatus for fly ash of the chain grate furnace type as set forth in claim 1, further comprising an air intake pipe (5), wherein one end of the air intake pipe (5) is provided with a blower (6) and the other end is communicated to the inside of the pre-burning furnace (1).
4. The pre-burning melting device of the fly ash of the chain grate furnace type as set forth in claim 3, characterized in that the end of the air inlet pipe (5) is respectively provided with a first air inlet port (12) and a second air inlet port (13) in parallel, and an air nozzle (15) is provided below the chain grate (14); the first air inlet interface (12) is arranged in the pre-combustion furnace (1) and above the chain grate (14), the second air inlet interface (13) is connected to the air nozzle (15), and the air nozzle (15) is upwards aligned to a chain plate with holes of the chain grate (14).
5. The pre-burning melting device of the fly ash of the chain grate furnace type as set forth in claim 1, characterized in that the top of the pre-burning furnace (1) is connected to the tail flue (4) through the connecting flue (3), and the end of the tail flue (4) is connected to the flue gas cleaning system through the induced draft fan (7).
6. The pre-burning melting device of fly ash of the chain oven type as claimed in claim 5, wherein the air inlet pipe (5) comprises at least a heat exchange coil (53), a heat exchange winding pipe bundle (52) and an external connecting part (51) which are connected end to end in sequence, the heat exchange coil (53) is arranged in the tail flue (4) and has at least one return stroke; the heat exchange winding tube bundle (52) is wound on the side wall of the pre-combustion furnace (1).
7. The pre-burning melting device of the fly ash of the chain grate furnace type as set forth in claim 1, characterized in that the smoke exhaust pipe (22) is connected to a smoke inlet port (23) in the pre-burning furnace (1), the smoke inlet port (23) is located above the chain grate (14) and the smoke inlet port (23) is located below the heat exchange winding pipe bundle (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921648897.3U CN210638046U (en) | 2019-09-29 | 2019-09-29 | Chain furnace type fly ash pre-burning melting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921648897.3U CN210638046U (en) | 2019-09-29 | 2019-09-29 | Chain furnace type fly ash pre-burning melting device |
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| Publication Number | Publication Date |
|---|---|
| CN210638046U true CN210638046U (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921648897.3U Active CN210638046U (en) | 2019-09-29 | 2019-09-29 | Chain furnace type fly ash pre-burning melting device |
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| CN (1) | CN210638046U (en) |
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- 2019-09-29 CN CN201921648897.3U patent/CN210638046U/en active Active
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