CN215951433U - Two-section type countercurrent rotary kiln for burning industrial solid waste - Google Patents
Two-section type countercurrent rotary kiln for burning industrial solid waste Download PDFInfo
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- CN215951433U CN215951433U CN202121283194.2U CN202121283194U CN215951433U CN 215951433 U CN215951433 U CN 215951433U CN 202121283194 U CN202121283194 U CN 202121283194U CN 215951433 U CN215951433 U CN 215951433U
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Abstract
A two-stage countercurrent rotary kiln for burning industrial solid wastes comprises: the first-stage rotary kiln is used for carrying out pyrolysis reaction on industrial solid waste; the hearth is arranged at the front end of the first section of rotary kiln and used for burning pyrolysis gas generated by pyrolysis reaction; the feeding unit is arranged at the front end of the hearth and is used for feeding industrial solid wastes into the hearth; the discharging unit is arranged at the tail end of the first section of rotary kiln and used for discharging pyrolysis products generated by pyrolysis reaction in the first section of rotary kiln; the second section of rotary kiln is connected with the discharging unit and is used for receiving the pyrolysis products and enabling the pyrolysis products to generate combustion reaction; the flue is connected with the second-stage rotary kiln and the first-stage rotary kiln, and high-temperature flue gas generated by combustion reaction in the second-stage rotary kiln enters the first-stage rotary kiln through the flue to supply heat for pyrolysis reaction; and the slag discharging unit is used for discharging slag generated by combustion reaction in the second section of rotary kiln. The two-section type countercurrent rotary kiln for burning industrial solid wastes can better control the pyrolysis and combustion working conditions.
Description
Technical Field
The utility model relates to the field of incinerators, in particular to a two-section type countercurrent rotary kiln for incinerating industrial solid waste.
Background
With the development of national industrialization, the yield of industrial solid waste (solid waste) is increasing. At present, industrial solid waste is mainly incinerated in modes of blending combustion of a household garbage incinerator, a water-cooled grate furnace, a fluidized bed and the like.
The household garbage incinerator has certain limitation on the material to be incinerated, the heat value is generally not more than 2500kcal/kg, and meanwhile, S, Cl content in the industrial solid waste is generally far beyond the household garbage, so that great pressure is brought to corrosion prevention of a flue gas purification system and a waste heat boiler. The water-cooled grate furnace has wider material heat value application range and can meet the requirement of disposing industrial solid wastes, but the water-cooled grate furnace has complex mechanism and high processing and manufacturing cost, and the connection of a water-cooled system and the grate has higher requirement on welding technology. The circulating fluidized bed has wide combustion adaptability and high heat efficiency, can be used for treating industrial solid waste, has high requirement on material pretreatment, meets the requirement of bed material and material fluidization on higher power consumption, has higher fly ash amount and higher running cost.
Therefore, a unified main disposal mode for industrial solid wastes is not formed in the market at present.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content of the present invention is not intended to define key features or essential features of the claimed solution, nor is it intended to be used to limit the scope of the claimed solution.
In view of the defects of the prior art, the utility model provides a two-section type countercurrent rotary kiln for burning industrial solid wastes, which comprises the following components:
the first-stage rotary kiln is used for performing pyrolysis reaction on industrial solid waste;
the hearth is arranged at the front end of the first section of rotary kiln and is used for burning pyrolysis gas generated by the pyrolysis reaction;
the feeding unit is arranged at the front end of the hearth and is used for feeding industrial solid wastes into the hearth;
the discharging unit is arranged at the tail end of the first section of rotary kiln and used for discharging pyrolysis products generated by pyrolysis reaction in the first section of rotary kiln;
the second section of rotary kiln is connected with the discharging unit and is used for receiving the pyrolysis products and enabling the pyrolysis products to generate combustion reaction;
the flue is connected with the second-section rotary kiln and the first-section rotary kiln, and high-temperature flue gas generated by combustion reaction in the second-section rotary kiln enters the first-section rotary kiln through the flue to supply heat for the pyrolysis reaction;
and the slag discharging unit is arranged at the tail end of the second section of rotary kiln and is used for discharging the slag generated by the combustion reaction in the second section of rotary kiln.
In one embodiment, the two-stage counter-current rotary kiln further comprises a primary fan connected to the second stage rotary kiln for supplying oxygen to the combustion reaction in the second stage rotary kiln.
In one embodiment, the two-stage counter-current rotary kiln further comprises a secondary air blower connected to the hearth for supplying oxygen to the combustion reaction in the hearth.
In one embodiment, the flue is provided with an oxygen meter and a first thermometer.
In one embodiment, a second thermometer and a pressure gauge are arranged on the hearth.
In one embodiment, the second section of rotary kiln is connected with the discharging unit through a connecting hopper, the connecting hopper is arranged from the discharging unit to the second section of rotary kiln in an inclined downward mode, and the height of the second section of rotary kiln is lower than that of the first section of rotary kiln.
In one embodiment, the flue is arranged obliquely downwards from the first section of rotary kiln to the second section of rotary kiln.
The two-section type countercurrent rotary kiln for burning industrial solid waste provided by the utility model adopts a two-section type design, the pyrolysis process of the countercurrent rotary kiln can well treat the industrial solid waste with higher volatile component content, and meanwhile, the material adaptability range is wide, the structure is simple, and the manufacturing cost is relatively low; the two-section rotary kiln separates the pyrolysis from the incineration, so that the pyrolysis and the incineration working conditions can be better controlled.
Drawings
The following drawings of the utility model are included to provide a further understanding of the utility model. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles and apparatus of the utility model. In the drawings, there is shown in the drawings,
fig. 1 is a schematic structural diagram of a two-stage countercurrent rotary kiln for incinerating industrial solid waste according to an embodiment of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the utility model.
In order to provide a thorough understanding of the present invention, detailed steps will be set forth in the following description in order to illustrate the two-stage counter-current rotary kiln for incinerating industrial solid waste as proposed by the present invention. It is apparent that the utility model may be practiced without limitation to the specific details known to those skilled in the art. The following detailed description of the preferred embodiments of the utility model, however, the utility model is capable of other embodiments in addition to those detailed.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The two-stage counter-current rotary kiln for burning industrial solid wastes of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the two-stage countercurrent rotary kiln for incinerating industrial solid waste of the present invention comprises: a first stage rotary kiln 104 for pyrolysis reaction of industrial solid waste; the hearth 103 is arranged at the front end of the first section of rotary kiln 104 and used for burning pyrolysis gas generated by pyrolysis reaction; the feeding unit is arranged at the front end of the hearth 103 and is used for feeding industrial solid wastes into the hearth 103; a discharge unit 106 disposed at the end of the first rotary kiln 104 for discharging pyrolysis products generated by pyrolysis reaction in the first rotary kiln 104; the second-stage rotary kiln 109 is connected with the discharging unit 106 and is used for receiving the pyrolysis products and enabling the pyrolysis products to generate combustion reaction; the flue 108 is connected with the second-section rotary kiln 109 and the first-section rotary kiln 104, and high-temperature flue gas generated by combustion reaction in the second-section rotary kiln 109 enters the first-section rotary kiln 104 through the flue 108 to supply heat for pyrolysis reaction; and the slag discharging unit 110 is arranged at the tail end of the second-stage rotary kiln 109 and is used for discharging slag generated by combustion reaction in the second-stage rotary kiln 109.
The two sections of rotary kilns in the embodiment of the utility model are counter-current rotary kilns, namely the flow directions of the flue gas and the materials are opposite. Compared with other industrial solid waste incineration systems, the rotary kiln has the advantages of simple structure, relatively low manufacturing cost and wide material treatment range; the process for controlling pyrolysis by the counter-flow rotary kiln can well treat industrial solid waste with high volatile content, and meanwhile, the process has the advantages of wide material adaptability range, simple structure and relatively low manufacturing cost. The first-stage rotary kiln 104 is a pyrolysis section, and the second-stage rotary kiln 109 is a burning kiln, so that the industrial solid waste can be pyrolyzed and incinerated, and a new mode is provided for the incineration disposal of the industrial solid waste. According to the embodiment of the utility model, the two working conditions of pyrolysis and combustion of the material are separated through the two-section rotary kiln, so that the working conditions of pyrolysis and combustion can be better controlled, and the industrial waste can be more environment-friendly and efficiently treated.
Specifically, the industrial solid waste is crushed and then enters the feeding hopper 101, and after falling down through the feeding hopper 101, the industrial solid waste is pushed into the hearth 103 by the pushing device 102 and then falls into the first section of the rotary kiln 104. Illustratively, the pushing device 102 includes a pushing trolley, and a hydraulic cylinder of the pushing trolley slowly drives the pushing trolley to advance forward on the pushing channel to a maximum stroke, so as to directly push the industrial solid waste into the hearth 103. An angled channel is connected between the hearth 103 and the first section of rotary kiln 104 to facilitate the material to slide off.
The industrial solid waste undergoes pyrolysis reactions in the first stage rotary kiln 104. Different from combustion reaction, pyrolysis reaction is a reaction process in which substances are heated to be decomposed, and the volatile substances in the industrial solid waste can be well utilized by adopting a pyrolysis process to treat the industrial solid waste. In the embodiment of the utility model, the heat required by the pyrolysis reaction in the first-stage rotary kiln 104 is provided by the high-temperature flue gas generated by burning the material in the second-stage rotary kiln 109, so that the resources are fully utilized.
The front end of the first section of rotary kiln 104 is provided with a hearth 103, pyrolysis gas generated by pyrolysis enters the hearth 103 to be combusted and release heat, and a secondary fan 105 is connected with the hearth 103 and used for supplying oxygen for combustion reaction in the hearth. Illustratively, the furnace 103 may be connected to a waste heat boiler and a flue gas purification system, and the waste heat boiler recovers and utilizes heat generated by the combustion of the pyrolysis gas. The hearth 103 can further burn off unburnt substances escaping from the head of the first stage rotary kiln 104 and ensure complete decomposition of pollutants generated during the combustion process.
Pyrolysis products of the pyrolysis reaction in the first-stage rotary kiln 104 are discharged from a discharge unit 106 at the kiln tail of the first-stage rotary kiln 104 and enter a second-stage rotary kiln 109. The pyrolysis product entering the second-stage rotary kiln 109 is a solid product, the pyrolysis product can be subjected to a combustion reaction in the second-stage rotary kiln 109, and the residue after combustion enters a residue discharging device 111 from a residue discharging unit 110 and is discharged out of the system.
Illustratively, referring to fig. 1, the second-stage rotary kiln 109 is connected with the discharge unit 106 of the first-stage rotary kiln 104 through the connecting hopper 107, the top of the connecting hopper 107 is positioned at the bottom of the discharge unit 106, the connecting hopper 107 is obliquely arranged downwards from the discharge unit 106 to the second-stage rotary kiln 109, the height of the second-stage rotary kiln 109 is lower than that of the first-stage rotary kiln 104, so that solid pyrolysis products can enter the second-stage rotary kiln 109 from the first-stage rotary kiln 104 under the action of gravity, meanwhile, the flue is obliquely arranged downwards from the first-stage rotary kiln 104 to the second-stage rotary kiln 109, high-temperature flue gas in the second-stage rotary kiln 109 rises to the first-stage rotary kiln 104 along the flue 108, and the connecting hopper 107 between the two rotary kilns does not need refractory materials.
The pyrolysis products of the first stage rotary kiln 104 are mainly composed of fixed carbon, and oxygen for the combustion reaction of the pyrolysis products in the second stage rotary kiln 109 is supplied by a primary air blower 112 provided at the end of the second stage rotary kiln 109. Specifically, the air inlet of the primary air fan 112 may be provided on the slag discharge unit 110. Therefore, the flow direction of the flue gas of the second section of rotary kiln is from the kiln tail to the kiln head, and is opposite to the movement direction of the materials. Flue gas generated by the combustion reaction in the second-stage rotary kiln 109 reenters the first-stage rotary kiln 104 through the flue 108 to supply heat for the pyrolysis reaction, and the flow direction of the flue gas in the first-stage rotary kiln 104 is also from the kiln tail to the kiln head and is opposite to the material movement direction. The primary air fan 112 is introduced from the kiln tail of the second-stage rotary kiln 109, so that the high-temperature flue gas in the second-stage rotary kiln 109 can flow towards the first-stage rotary kiln 104.
According to the embodiment of the utility model, the pyrolysis and combustion of the material are separated through the two-section rotary kiln, so that the working conditions of pyrolysis and combustion can be better controlled, and the industrial waste can be more environment-friendly and efficiently treated. Illustratively, the flue 108 is provided with an oxygen meter 113 and a temperature meter 114 for detecting the burning condition in the second-stage rotary kiln 109. Illustratively, a second thermometer 115 and a pressure gauge 116 are disposed on the furnace 103 for detecting pyrolysis conditions in the first stage rotary kiln 104.
In summary, the two-stage counter-flow rotary kiln of the embodiment of the present invention has at least the following advantages:
(1) the rotary kiln is adopted to treat the industrial solid waste, compared with other types of industrial solid waste incineration systems, the rotary kiln has the advantages of simple structure, relatively low manufacturing cost and wide material treatment range, and particularly, the pyrolysis process of the counter-flow rotary kiln is more suitable for the industrial solid waste with higher volatile matter;
(2) the pyrolysis and combustion of materials are separated through the two sections of rotary kilns, so that the pyrolysis and combustion working conditions are better controlled, and the environment-friendly and efficient treatment of industrial solid wastes is facilitated.
Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the foregoing illustrative embodiments are merely exemplary and are not intended to limit the scope of the utility model thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as set forth in the appended claims.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another device, or some features may be omitted, or not executed.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the description of exemplary embodiments of the utility model, various features of the utility model are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the method of the present invention should not be construed to reflect the intent: that the utility model as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the utility model, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The utility model may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (7)
1. A two-section type countercurrent rotary kiln for burning industrial solid wastes is characterized by comprising:
the first-stage rotary kiln is used for performing pyrolysis reaction on industrial solid waste;
the hearth is arranged at the front end of the first section of rotary kiln and is used for burning pyrolysis gas generated by the pyrolysis reaction;
the feeding unit is arranged at the front end of the hearth and is used for feeding industrial solid wastes into the hearth;
the discharging unit is arranged at the tail end of the first section of rotary kiln and used for discharging pyrolysis products generated by pyrolysis reaction in the first section of rotary kiln;
the second section of rotary kiln is connected with the discharging unit and is used for receiving the pyrolysis products and enabling the pyrolysis products to generate combustion reaction;
the flue is connected with the second-section rotary kiln and the first-section rotary kiln, and high-temperature flue gas generated by combustion reaction in the second-section rotary kiln enters the first-section rotary kiln through the flue to supply heat for the pyrolysis reaction;
and the slag discharging unit is arranged at the tail end of the second section of rotary kiln and is used for discharging the slag generated by the combustion reaction in the second section of rotary kiln.
2. The two-stage countercurrent rotary kiln for incinerating industrial solid waste as claimed in claim 1, further comprising a primary air blower disposed at the end of the second stage rotary kiln for supplying oxygen to the combustion reaction in the second stage rotary kiln.
3. The two-stage countercurrent rotary kiln for incinerating industrial solid waste according to claim 1, further comprising a secondary fan disposed at the upper part of said hearth for supplying oxygen to the combustion reaction in said hearth.
4. The two-stage countercurrent rotary kiln for incinerating industrial solid waste according to claim 1, wherein said flue is provided with an oxygen meter and a first thermometer.
5. The two-stage countercurrent rotary kiln for incinerating industrial solid waste according to claim 1, wherein a second thermometer and a pressure gauge are arranged on the hearth.
6. The two-stage countercurrent rotary kiln for incinerating industrial solid waste according to claim 1, wherein the second stage rotary kiln is connected with the discharging unit through a connecting hopper, the connecting hopper is obliquely and downwardly arranged from the discharging unit to the second stage rotary kiln, and the height of the second stage rotary kiln is lower than that of the first stage rotary kiln.
7. The two-stage countercurrent rotary kiln for burning industrial solid waste according to claim 6, wherein the flue is disposed obliquely downward from the first stage rotary kiln to the second stage rotary kiln.
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| CN202121283194.2U CN215951433U (en) | 2021-06-08 | 2021-06-08 | Two-section type countercurrent rotary kiln for burning industrial solid waste |
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| CN202121283194.2U CN215951433U (en) | 2021-06-08 | 2021-06-08 | Two-section type countercurrent rotary kiln for burning industrial solid waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704833A (en) * | 2022-05-20 | 2022-07-05 | 中冶长天国际工程有限责任公司 | Method and system for cooperatively disposing hazardous waste by using rotary kiln and sintering machine |
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2021
- 2021-06-08 CN CN202121283194.2U patent/CN215951433U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704833A (en) * | 2022-05-20 | 2022-07-05 | 中冶长天国际工程有限责任公司 | Method and system for cooperatively disposing hazardous waste by using rotary kiln and sintering machine |
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