CN212504614U - Feeding system for cooperatively treating hazardous waste in cement kiln - Google Patents
Feeding system for cooperatively treating hazardous waste in cement kiln Download PDFInfo
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- CN212504614U CN212504614U CN202021241647.0U CN202021241647U CN212504614U CN 212504614 U CN212504614 U CN 212504614U CN 202021241647 U CN202021241647 U CN 202021241647U CN 212504614 U CN212504614 U CN 212504614U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a cement kiln is dangerous refuse's of coprocessing feeding system, aim at solve current cement kiln coprocessing dangerous discarded object device, adopt the direct opening of dore furnace to throw the material or directly spout into dore furnace with the plunger pump, this kind is thrown the material mode and can have the problem of certain influence to maintaining dore furnace negative pressure state. The system comprises a pretreatment system for drying and grinding hazardous wastes, a first conveying assembly, a micro-dry material finished product bin, a second conveying assembly, a dry material finished product bin, a cement kiln, a third conveying assembly and a fourth conveying assembly, wherein the cement kiln comprises a kiln body, a decomposing furnace, a grate cooler, a discharging pipe and a tertiary air pipe. Adopt this application, when improving cement raw material and hazardous waste degree of consistency, can increase the dwell time of hazardous waste in the dore furnace, improve decomposition efficiency, to the heavy metal solidification that contains the hazardous waste have the promotion effect in cement clinker, realize cement clinker's steady ejection of compact.
Description
Technical Field
The application relates to the field of dangerous waste treatment, in particular to a feeding system for the cooperative treatment of dangerous waste in a cement kiln.
Background
For hazardous wastes, the existing treatment methods include incineration, landfill, materialization and the like. In recent years, the cooperation of cement kilns for treating dangerous wastes has been promoted in China. The ecological environment department released the national environmental protection standard "environmental protection technical Specification for the cooperative disposal of solid wastes in Cement kilns" (HJ 662-2013) in 2013, 12 and 27 months. The cement kiln has the characteristics of high temperature, good thermal stability, large volume and the like, hazardous wastes are cooperatively treated by utilizing the cement kiln, so that the large-scale harmless treatment of various hazardous wastes can be realized, and the hazardous wastes can be brought into a cement kiln system to realize resource utilization. In addition, under the high-temperature alkaline condition of the cement kiln, secondary pollution caused by dioxin, heavy metals and the like can be effectively avoided. By the end of 5 months in 2017, 35 cement enterprises with cement kiln comprehensive disposal hazardous waste operation licenses exist in the country, and the approved disposal scale exceeds 200 million tons.
At present, the discharging modes of the cement kiln for the cooperative treatment of the hazardous waste are mainly as follows: the materials are directly put into the decomposing furnace through an opening and directly sprayed into the decomposing furnace through a plunger pump. However, the two ways of directly feeding into the decomposing furnace will impact the decomposing furnace to some extent, and will also have some influence on maintaining the negative pressure state of the decomposing furnace, and the uniformity of the hazardous waste and the cement raw meal will also decrease.
To this end, a new device and/or structure is urgently needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: to current cement kiln coprocessing hazardous waste device, adopt the direct opening of dore furnace to throw the material or directly spout into dore furnace with the plunger pump, this kind of throw the material mode can have the problem of certain influence to maintaining dore furnace negative pressure state, provides a cement kiln coprocessing hazardous waste's material feeding system. The application is mainly used for solving the problem of impact of the existing feeding mode on heat balance in the decomposing furnace, and can improve the uniformity of cement raw materials and hazardous wastes. Adopt this application, when improving cement raw material and hazardous waste degree of consistency, can increase the dwell time of hazardous waste in the dore furnace, improve decomposition efficiency, to the heavy metal solidification that contains the hazardous waste have the promotion effect in cement clinker, realize cement clinker's steady ejection of compact. The application has the advantages of ingenious design, reasonable design and convenient operation, is favorable for promoting the treatment of dangerous waste, and has higher application value.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a feeding system for cooperatively treating hazardous wastes in a cement kiln comprises a pretreatment system, a first conveying assembly, a micro-dry material finished product bin, a second conveying assembly, a dry material finished product bin, the cement kiln, a third conveying assembly and a fourth conveying assembly, wherein the pretreatment system is used for drying and grinding the hazardous wastes, the cement kiln comprises a kiln body, a decomposing furnace, a grate cooler, a discharging pipe and a tertiary air pipe, two ends of the tertiary air pipe are respectively connected with the grate cooler and the decomposing furnace, the discharging pipe is connected with the decomposing furnace, the decomposing furnace is connected with the kiln body, the kiln body is connected with the grate cooler, the pretreatment system is connected with the dry material finished product bin through the first conveying assembly, when the moisture content of the dry materials and the moisture content of the ground materials are lower than a set value, the materials can be conveyed into the dry material finished product bin for storage through the first conveying assembly, the pretreatment system is connected with the micro-dry material finished product bin through the second conveying assembly, and the moisture content of the dry materials and the ground materials when the pretreatment system is dry materials The material can be conveyed to a micro-dry material finished product bin by a second conveying assembly to be stored, the micro-dry material finished product bin is connected with a tertiary air pipe through a third conveying assembly, and the dry material finished product bin is connected with a discharging pipe through a fourth conveying assembly.
The first conveying assembly comprises first feeding equipment and a first bucket elevator, the pretreatment system is connected with the dry material finished product bin sequentially through the first feeding equipment and the first bucket elevator, and when the water content obtained by drying and grinding of the pretreatment system is lower than a set value, the materials are conveyed sequentially through the first feeding equipment, and the materials can be conveyed into the dry material finished product bin for storage after being lifted by the first bucket elevator;
the second conveying assembly comprises second feeding equipment and a second bucket elevator, the pretreatment system is connected with the micro-dry material finished product bin sequentially through the second feeding equipment and the second bucket elevator, and materials, when the moisture content of the materials obtained by drying and grinding of the pretreatment system is higher than a set value, are conveyed sequentially through the second feeding equipment and are lifted by the second bucket elevator and then can be conveyed into the micro-dry material finished product bin for storage.
The first feeding device and the second feeding device are different feeding devices or the same feeding device.
The first feeding device and the second feeding device are respectively conveying belts.
The third conveying assembly comprises third feeding equipment and a third bucket elevator, the micro-dry material finished product bin is connected with the tertiary air pipe sequentially through the third feeding equipment and the third bucket elevator, and the micro-dry material finished product bin can enter the tertiary air pipe after being conveyed by the third feeding equipment and lifted by the third bucket elevator sequentially.
The third feeding device is a conveying belt.
The fourth conveying assembly comprises fourth feeding equipment and a fourth bucket elevator, the dry material finished product bin is sequentially connected with the discharging pipe through the fourth feeding equipment and the fourth bucket elevator, and the dry material finished product bin can enter the discharging pipe after being conveyed by the fourth feeding equipment and lifted by the fourth bucket elevator.
The fourth feeding device is a conveying belt.
In view of the foregoing problems, the present application provides a feeding system for the cooperative treatment of hazardous waste in a cement kiln. The system comprises a pretreatment system, a first conveying assembly, a micro-dry material finished product bin, a second conveying assembly, a dry material finished product bin, a cement kiln, a third conveying assembly and a fourth conveying assembly. In this application, pretreatment systems, little drier finished product storehouse, drier finished product storehouse are the little negative pressure state respectively.
In the application, the dangerous waste is ground and dried by a pretreatment system, the ground and dried powder is detected, the powder with the water content of less than or equal to 2% enters a dry material finished product bin for homogenization, and the powder with the water content of 2% -10% enters a micro dry material finished product bin for homogenization; then, the powder material homogenized in the dry material finished product bin enters a discharging pipe of the cement kiln after being conveyed by fourth feeding equipment and lifted by a fourth bucket elevator in sequence; the powder after the micro-dry material finished product bin is homogenized sequentially enters a tertiary air pipe of the cement kiln after being conveyed by third feeding equipment and lifted by a third bucket elevator; and finally, the mixture enters a rotary kiln through a decomposing furnace for incineration treatment. In this application, the material that gets into the unloading pipe can be in coordination with cement raw meal and the boiling is collected in the dore furnace, decomposes through the dore furnace again, can improve with the degree of consistency of raw meal, increases the dwell time of dangerous waste powder, to the heavy metal solidification that contains dangerous discarded object has the promotion effect in cement clinker in the rotary kiln, can realize cement clinker's steady ejection of compact. Meanwhile, the powder after the homogenization of the micro-dry material finished product bin is preheated and pre-dried in the third branch pipe and then decomposed by the decomposing furnace, so that the impact caused by the direct entering of the material can be relieved, and the positive stabilizing effect on the heat balance in the decomposing furnace is achieved.
Compared with the prior art, the device effectively solves the problem that the prior feeding mode has certain influence on maintaining the negative pressure state of the decomposing furnace. The system of the application has the advantages of stable operation, good flexibility and small influence on cement lines and environment. By adopting the method and the device, harmless treatment of the hazardous waste can be realized, the hazardous waste can be used as a substitute raw material for cement production, and resource utilization of the hazardous waste is realized. Meanwhile, the method is reasonable in design and low in cost, effectively treats the waste, achieves the reduction target, promotes the deep development of circular economy, and has a positive effect.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
(1) by adopting the device, the materials entering the discharging pipe can be collected in the decomposing furnace together with the cement raw materials in a boiling way and then decomposed by the decomposing furnace, so that the retention time of the dangerous waste powder can be prolonged, the uniformity of the dangerous waste powder and the raw materials can be improved, and the decomposition rate can be improved from 70-75% to 85-90%;
(2) by adopting the method, in the rotary kiln, the heavy metal contained in the hazardous waste is solidified in the cement clinker, so that the stable discharge of the cement clinker can be realized;
(3) the powder after the homogenization of the micro-dry material finished product bin is preheated and pre-dried in the third branch pipe and then decomposed by the decomposing furnace, so that the impact caused by the direct entering of the material can be relieved, the positive stabilizing effect on the heat balance in the decomposing furnace can be achieved, and the decomposing efficiency can be improved;
(4) the application has the advantages of ingenious design, reasonable design and convenient operation, is favorable for promoting the treatment of dangerous waste, and has better application value.
Drawings
FIG. 1 is a schematic structural diagram of a feeding system for a cement kiln for co-processing hazardous wastes in example 1.
The labels in the figure are: 1. the device comprises a pretreatment system, 3, a first bucket elevator, 4, a second bucket elevator, 5, a micro-dry material finished product bin, 6, a dry material finished product bin, 7, third feeding equipment, 8, fourth feeding equipment, 9, a third bucket elevator, 10, a fourth bucket elevator, 11, a discharging pipe, 12, a tertiary air pipe, 13, a kiln body, 14 and a decomposing furnace.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The feeding system comprises a pretreatment system, a first conveying assembly, a micro-dry material finished product bin, a second conveying assembly, a dry material finished product bin, a cement kiln, a third conveying assembly and a fourth conveying assembly. In this embodiment, the pretreatment system is used for drying and grinding hazardous waste. The cement kiln comprises a kiln body, a decomposing furnace, a grate cooler, a discharging pipe and a tertiary air pipe, wherein two ends of the tertiary air pipe are respectively connected with the grate cooler and the decomposing furnace, the discharging pipe is connected with the decomposing furnace, the decomposing furnace is connected with the kiln body, and the kiln body is connected with the grate cooler.
In this embodiment, the first conveying assembly includes a first feeding device and a first bucket elevator, and the pretreatment system is connected with the dry material finished product bin sequentially through the first feeding device and the first bucket elevator. The second conveying assembly comprises second feeding equipment and a second bucket elevator, and the pretreatment system is connected with the micro-dry material finished product bin sequentially through the second feeding equipment and the second bucket elevator. In this embodiment, the first feeding device and the second feeding device are the same feeding device. Meanwhile, the third conveying assembly comprises third feeding equipment and a third bucket elevator, and the micro-dry material finished product bin is connected with the tertiary air pipe sequentially through the third feeding equipment and the third bucket elevator. The fourth conveying assembly comprises fourth feeding equipment and a fourth bucket elevator, and the dry material finished product bin is connected with the discharging pipe sequentially through the fourth feeding equipment and the fourth bucket elevator. In this embodiment, the first feeding device, the second feeding device, the third feeding device, and the fourth feeding device are respectively conveyor belts.
Pretreatment system links to each other and pretreatment system drying and crocus gained moisture content be less than the material when setting value through first conveying assembly and drier finished product storehouse and can be carried to the drier finished product storehouse in by first conveying assembly and store, pretreatment system links to each other and pretreatment system drying and crocus gained moisture content be higher than the setting value through second conveying assembly and drier finished product storehouse when material can be carried to the drier finished product storehouse in a little by second conveying assembly and store, drier finished product storehouse links to each other with the cubic tuber pipe through third conveying assembly a little, drier finished product storehouse passes through the fourth conveying assembly and links to each other with the unloading pipe.
The working process of the device of the embodiment is as follows: the dangerous waste is ground and dried in a pretreatment system to finish pretreatment operation; then, detecting the powder after being ground and dried, wherein the powder with the water content of less than or equal to 2% enters a dry material finished product bin to be homogenized (specifically, the powder with the water content of less than or equal to 2% is conveyed through a first feeding device and lifted through a first bucket elevator and then conveyed into the dry material finished product bin to be temporarily stored), and the powder with the water content of 2% -10% enters a micro dry material finished product bin to be homogenized (specifically, the powder with the water content of 2% -10% is conveyed through a second feeding device and lifted through a second bucket elevator and then conveyed into the micro dry material finished product bin to be stored); then, after being conveyed by a fourth feeding device and lifted by a fourth bucket elevator in sequence, the powder homogenized in the dry material finished product bin enters a discharge pipe of the cement kiln (in the application, the material entering the discharge pipe can be collected in a decomposing furnace in a boiling manner in cooperation with cement raw materials and then decomposed by the decomposing furnace, so that the retention time of dangerous waste powder can be prolonged, the uniformity of the dangerous waste powder and the raw materials can be improved, and the decomposition effect can be improved from 70-75% to 85-90%); and the powder after the homogenization of the micro-dry material finished product bin enters a tertiary air pipe of the cement kiln after being sequentially conveyed by a third feeding device and lifted by a third bucket elevator (in the application, the powder after the homogenization of the micro-dry material finished product bin is preheated and pre-dried in a tertiary branch pipe and then decomposed by a decomposing furnace, so that the impact caused by the direct entering of the material can be relieved, the positive stabilizing effect on the heat balance in the decomposing furnace is achieved, and the powder finally enters the rotary kiln through the decomposing furnace for incineration treatment).
In conclusion, by adopting the device of the embodiment, after being pretreated, the dangerous waste respectively enters the dry material finished product bin and the micro dry material finished product bin for homogenization treatment, the material in the dry material finished product bin is discharged through the discharging pipe, and the material in the micro dry material finished product bin is discharged through the tertiary air pipe;
the materials entering the blanking pipe and the cement raw materials are boiled and collected in the decomposing furnace and then decomposed by the decomposing furnace, so that the mixing uniformity of the materials and the raw materials is improved, the residence time of dangerous wastes in the decomposing furnace is prolonged, the decomposition efficiency is improved, the heavy metal contained in the dangerous wastes is solidified in the cement clinker in the rotary kiln, and the stable discharge of the cement clinker can be realized; the material entering the tertiary air pipe can be preheated and pre-dried in the tertiary air pipe and then enters the decomposing furnace, so that the impact caused by the direct entering of the material is relieved, and the positive stabilizing effect is achieved on the heat balance in the decomposing furnace.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The feeding system is characterized by comprising a pretreatment system, a first conveying assembly, a micro-dry material finished product bin, a second conveying assembly, a dry material finished product bin, a cement kiln, a third conveying assembly and a fourth conveying assembly, wherein the pretreatment system is used for drying and grinding hazardous wastes, the first conveying assembly, the micro-dry material finished product bin, the second conveying assembly, the dry material finished product bin, the cement kiln, the third conveying assembly and the fourth conveying assembly are used for drying and grinding hazardous wastes, the cement kiln comprises a kiln body, a decomposing furnace, a grate cooler, a discharging pipe and a tertiary air pipe, two ends of the tertiary air pipe are respectively connected with the grate cooler and the decomposing furnace, the discharging pipe is connected with the decomposing furnace, the decomposing furnace is connected with the kiln body, the kiln body is connected with a grate of the cooler, the pretreatment system is connected with the dry material finished product bin through the first conveying assembly, when the moisture content of the materials obtained by drying and grinding of the pretreatment system is lower than a set value, the dry material finished product bin can be conveyed into the dry material finished And when the material is higher than the set value, the material can be conveyed to a micro-dry material finished product bin by a second conveying assembly to be stored, the micro-dry material finished product bin is connected with a tertiary air pipe through a third conveying assembly, and the dry material finished product bin is connected with a discharging pipe through a fourth conveying assembly.
2. The feeding system of claim 1, wherein the first conveying assembly comprises first feeding equipment and a first bucket elevator, the pretreatment system is connected with the dry finished product bin sequentially through the first feeding equipment and the first bucket elevator, and when the moisture content obtained by drying and grinding the pretreatment system is lower than a set value, the material is conveyed sequentially through the first feeding equipment and lifted by the first bucket elevator and then can be conveyed into the dry finished product bin for storage;
the second conveying assembly comprises second feeding equipment and a second bucket elevator, the pretreatment system is connected with the micro-dry material finished product bin sequentially through the second feeding equipment and the second bucket elevator, and materials, when the moisture content of the materials obtained by drying and grinding of the pretreatment system is higher than a set value, are conveyed sequentially through the second feeding equipment and are lifted by the second bucket elevator and then can be conveyed into the micro-dry material finished product bin for storage.
3. The charging system of claim 2, wherein the first and second feeding devices are different feeding devices or the same feeding device.
4. The feeding system of claim 3, wherein the first feeding device and the second feeding device are respectively a conveyer belt.
5. The feeding system according to any one of claims 1 to 4, wherein the third conveying assembly comprises a third feeding device and a third bucket elevator, the micro-dry material finished product bin is connected with the tertiary air duct through the third feeding device and the third bucket elevator in sequence, and the micro-dry material finished product bin can enter the tertiary air duct after being conveyed through the third feeding device and lifted through the third bucket elevator in sequence.
6. The feeding system of claim 5, wherein the third feeding device is a conveyor belt.
7. The feeding system of claim 1, wherein the fourth conveying assembly comprises a fourth feeding device and a fourth bucket elevator, the dry material finished product bin is connected with the blanking pipe sequentially through the fourth feeding device and the fourth bucket elevator, and the dry material finished product bin can enter the blanking pipe after being conveyed sequentially through the fourth feeding device and lifted by the fourth bucket elevator.
8. The feeding system of claim 7, wherein the fourth feeding device is a conveyor belt.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021241647.0U CN212504614U (en) | 2020-06-30 | 2020-06-30 | Feeding system for cooperatively treating hazardous waste in cement kiln |
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| CN202021241647.0U CN212504614U (en) | 2020-06-30 | 2020-06-30 | Feeding system for cooperatively treating hazardous waste in cement kiln |
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| CN212504614U true CN212504614U (en) | 2021-02-09 |
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| CN202021241647.0U Active CN212504614U (en) | 2020-06-30 | 2020-06-30 | Feeding system for cooperatively treating hazardous waste in cement kiln |
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