CN216431725U - External hanging type preheating and pre-burning step furnace device for cooperatively treating solid hazardous waste in cement kiln - Google Patents
External hanging type preheating and pre-burning step furnace device for cooperatively treating solid hazardous waste in cement kiln Download PDFInfo
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- CN216431725U CN216431725U CN202122969202.5U CN202122969202U CN216431725U CN 216431725 U CN216431725 U CN 216431725U CN 202122969202 U CN202122969202 U CN 202122969202U CN 216431725 U CN216431725 U CN 216431725U
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Abstract
The utility model discloses a cement kiln deals with useless outer hanging preheating of solid danger in coordination, precombustion ladder furnace device, ladder furnace body, hot-blast main and feeding pipe way on locating the tertiary tuber pipe, the hot-blast main both ends communicate the dore respectively with the air outlet at ladder furnace body top, feeding pipe says the intercommunication the feed inlet at ladder furnace body top, ladder furnace body bottom is equipped with and is connected to the feed opening of tertiary tuber pipe, ladder furnace body includes the furnace body and locates the echelonment platform structure of furnace body one side, every layer of platform of echelonment platform structure all is equipped with the orientation by back one side the device that breaks up in the furnace body, be equipped with the insulating layer on the furnace body. The utility model discloses can guarantee that the material has rolling motion in the stove, strengthen material and hot-blast contact opportunity, reduce material moisture through preheating, precombustion and guarantee to burn the effect, improve the handling capacity.
Description
Technical Field
The utility model relates to a cement kiln deals with useless outer hanging preheating of solid danger in coordination, precombustion stepped furnace device.
Background
With the vigorous development of the environmental protection industry in China, the disposal of solid hazardous waste by a cement kiln system is bound to become a main body of development with the unique harmless disposal advantages, and the cement kiln co-disposal occupies 45% of the solid waste incineration disposal field. There are several technical routes for the coordinated treatment of semi-solid waste production by cement kilns, but the following disadvantages still exist.
1) After the pretreated semi-solid hazardous waste is directly added into a decomposing furnace, the phenomena of current fluctuation of a main motor of the kiln and unstable kiln conditions can occur. The method is mainly caused by large and unstable heat value of semi-solid hazardous waste water, particularly large-particle hazardous waste containing different heat values and moisture falls into a rotary kiln from a decomposing furnace and enters the rotary kiln through the kiln tail, and materials are directly combusted at the rear part of the rotary kiln or the moisture is rapidly vaporized, so that the flow of raw materials is accelerated, the raw materials which are not completely reacted directly flow into a burning zone, and the kiln current is reduced. Meanwhile, the unstable flow rate of the materials in the kiln can also cause the unstable kiln current, so that the operation difficulty of a firing system is increased.
2) Hazardous wastes cannot be effectively dispersed in the decomposing furnace, lump materials can be formed and accumulated on the cone part of the decomposing furnace or fall into a kiln tail smoke chamber, and the ventilation in the kiln is influenced; the material containing organic heat value can be burnt at the slope of the smoke chamber to form local high temperature, so that the skinning blockage is caused; the high-heat-value materials falling into the kiln form burning fire balls, and form large blocks or rings in the kiln, which seriously affect the calcination system of the kiln system and directly affect the yield and the clinker quality of the cement kiln.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cement kiln deals with useless outer hanging preheating of solid danger in coordination, precombustion step furnace device for solve among the prior art original danger useless by decomposing furnace treatment in-process, owing to contain great moisture and cause the cement kiln technology system disorder and the uncontrolled phenomenon of product quality, the operation degree of difficulty is big, conventional processing apparatus can not carry out the cycle to the material after gathering piles up many times in the processing procedure simultaneously and break up, cause difficult material of breaking up in the short time fully, lead to its preheating, the insufficient technical problem of reaction of presintering.
Cement kiln in coordination with handle useless outer hanging preheating of solid danger, precombustion ladder furnace device, including locating ladder furnace body, hot-blast main and the feed pipe on the tertiary tuber pipe, the hot-blast main both ends communicate respectively the dore with the air outlet at ladder furnace body top, the feed pipe intercommunication the feed inlet at ladder furnace body top, ladder furnace body bottom is equipped with and is connected to the feed opening of tertiary tuber pipe, ladder furnace body includes the furnace body and locates the echelonment platform structure of furnace body one side, every layer of platform of echelonment platform structure all is equipped with the orientation by back one side device of breaing up in the furnace body, be equipped with the insulating layer on the furnace body.
Preferably, the platform in the ladder-shaped platform structure comprises a stockpiling platform arranged on the uppermost layer and a plurality of levels of incineration platforms arranged below the stockpiling platform in sequence from top to bottom, and the number of levels of the incineration platforms is not less than three.
Preferably, the scattering device is a pulse type air cannon which periodically sprays high-speed gas, and a spraying pipe of the pulse type air cannon extends out of the stove body and is connected with a corresponding high-pressure gas source.
Preferably, the part of the front side of the furnace body, which is opposite to the stepped platform structure, is an inclined surface, the inclined direction of the inclined surface is consistent with the step extending direction of the stepped platform structure, and the inclined surface is connected with the upper end and the lower end of the furnace body through a bevel and a vertical side wall.
Preferably, the part of the front side of the furnace body, which is opposite to the stepped platform structure, is an arc-shaped arch, the upper end of the arc-shaped arch is tangent to the end surface of the upper end of the furnace body and connected into a whole, and the lower end of the arc-shaped arch is tangent to the vertical side wall of the lower end of the furnace body and connected into a whole.
Preferably, the furnace body front side is equipped with parameter acquisition module, including negative pressure table and thermocouple, the furnace body side still is equipped with a plurality of clear material mouths of observation that can the switching, be equipped with the observation window on the clear material mouth of observation.
Preferably, the heat insulation layer on the furnace body is composed of a calcium silicate plate and a castable and is fixed on the inner surface of the furnace body.
The utility model has the advantages of it is following: (1) this structure is useless in the processing procedure of handling at the solid danger, can guarantee that the material has the motion of rolling in the stove, has strengthened material and hot-blast (tertiary air) contact chance, reduces material moisture through preheating, precombustion and guarantees the effect of burning, improves the handling capacity.
(2) By controlling the excitation frequency of the pulse type air cannon, the drying, preheating and presintering of the moisture of the materials are enhanced, and the influence of the disposal process on the working condition of the cement kiln is reduced.
(3) The structure has preheating and pre-burning functions on semi-solid hazardous waste, so that the structure has substantial effects on the control of nitrogen oxide emission, organic matters and dioxin.
(4) The utility model discloses an outer hanging structure to have furnace body compact structure, the fault rate is low, easily installation, can satisfy the advantage of arranging the requirement of different cement kiln types. The corresponding scheme has the advantages of low implementation cost, low failure rate, low modification cost and short modification construction time.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention (solid arrows indicate the flowing direction of semi-solid hazardous wastes, and hollow arrows indicate the flowing direction of hot air).
FIG. 2 is a schematic structural view of the stepped furnace body in the structure shown in FIG. 1.
FIG. 3 is a schematic cross-sectional view of the stepped furnace body of the structure shown in FIG. 1.
FIG. 4 is a schematic sectional view of a stepped furnace body according to a second embodiment of the present invention.
The labels in the figures are: 1. furnace body, 2, air outlet, 3, feed inlet, 4, pulsed air bubble, 5, observation window, 6, feed opening, 7, insulating layer, 8, echelonment platform structure, 9, hot-blast pipeline, 10, dore furnace, 11, cubic tuber pipe, 12, feed pipe, 13, parameter acquisition module, 14, observation clear material mouth.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided to help those skilled in the art to more fully, accurately and deeply understand the concept and technical solutions of the present invention, through the description of the embodiments with reference to the accompanying drawings.
As shown in figures 1-4, the utility model provides an external hanging type preheating and pre-burning stepped furnace device for cooperatively treating solid hazardous waste by a cement kiln, which comprises a stepped furnace body arranged on a tertiary air pipe 11, a hot air pipeline 9 and a feeding pipeline 12, the two ends of the hot air pipeline 9 are respectively communicated with the decomposing furnace 10 and the air outlet 2 at the top of the stepped furnace body, hot air is discharged from the air outlet of the stepped furnace body, the hot air pipeline introduces the hot air into the decomposing furnace, the feeding pipeline 12 is communicated with the feeding hole 3 at the top of the stepped furnace body, the bottom of the stepped furnace body is provided with a discharging hole 6 connected to the tertiary air pipe 11, the step furnace body comprises a furnace body 1 and a step-shaped platform structure 8 arranged on one side of the furnace body 1, one side of each layer of platform of the stepped platform structure 8 close to the back is provided with a scattering device facing the inside of the furnace body 1, and the furnace body 1 is provided with a heat insulation layer 7.
The platform in the step-shaped platform structure 8 comprises a stockpiling platform arranged on the uppermost layer and a plurality of stages of incineration platforms arranged below the stockpiling platform in sequence from top to bottom, and the number of stages of the incineration platforms is not less than three. Therefore, the materials can be fully preheated and pre-incinerated in the flowing process of each stage of platform, and the process can continuously obtain hot air with high oxygen content from tertiary air, so that the incineration is more sufficient.
The heat-resistant induced air device is arranged in the hot air channel and can be a heat-resistant variable-frequency induced air facility, the induced air volume is adjusted through frequency conversion, the furnace volume can be increased to a certain extent, the flowing resistance of hot air is reduced, the flowing is smoother, and therefore the preheating and pre-burning effects are improved.
The scattering device is a pulse type air cannon 4 which periodically and instantaneously sprays high-speed gas, and a spraying pipe of the pulse type air cannon 4 extends out of the furnace body 1 and is connected with a corresponding high-pressure gas source. The residence time of the semi-solid hazardous waste in the hearth of the air-material counter-flow stepped furnace provided by the scheme is controllable. By adjusting the blowing frequency of the pulse type air cannon 4, the preburning time of the materials in the step furnace body can be controlled. The stepped platform structure 8 not only ensures the burning time of the hazardous waste, but also buffers the unstable material flow, the multi-stage burning platform and the pulse type air cannon 4 further strengthen the burning effect, and can flexibly control the retention time and ensure the sufficient burning of the hazardous waste.
In a first embodiment, the portion of the front side of the furnace body 1 opposite to the stepped platform structure 8 is an inclined surface, the inclined direction of the inclined surface is consistent with the step extending direction of the stepped platform structure 8, and the inclined surface is connected with the upper end and the lower end of the furnace body 1 through a bevel and a vertical side wall. The structure is convenient to manufacture, and can allow tertiary air to flow upwards in the furnace body 1 smoothly.
In the second embodiment, the difference from the first embodiment is the structure of the furnace body 1, and the structure of the furnace body 1 is different from that of the first embodiment: the part of the front side of the furnace body 1, which is opposite to the stepped platform structure 8, is an arc-shaped arch, the upper end of the arc-shaped arch is tangent to the end surface of the upper end of the furnace body 1 and connected into a whole, and the lower end of the arc-shaped arch is tangent to the vertical side wall of the lower end of the furnace body 1 and connected into a whole. Compared with the furnace body 1 in the first embodiment, the structure can further reduce the flow resistance of hot air, the flow speed is smoother, and the furnace volume can be increased to a certain extent, so that the preheating and pre-burning effects are improved.
1 front side of furnace body is equipped with parameter acquisition module 13 for gather atmospheric pressure and temperature in the stove, including burden voltmeter and thermocouple, 1 side of furnace body still is equipped with a plurality of clear material mouths 14 of observation that can the switching, be equipped with observation window 5 on the clear material mouth 14 of observation, seal when observation window 5 when observing clear material mouth 14, make things convenient for operating personnel to look over the condition that preheats in the stove and burn in advance through this observation window 5, open observation window 5, the operator can be through this clear material mouth 14 of observation to the collection of stove interior material and clearance. In addition, a high-temperature resistant camera can be arranged in the front side of the furnace body 1, so that the condition of internal materials can be directly observed without arranging an observation window.
The heat insulation layer 7 on the furnace body 1 is composed of a calcium silicate plate and a casting material and is fixed with the inner surface of the furnace body 1, so that the combustion temperature in the furnace can be increased, and the safety of the surrounding personnel environment can be protected. The hot air duct 9 is made of a material with heat insulation and fire resistance, such as a refractory anti-skinning castable.
Above-mentioned ladder furnace device is for having utilized the outer hanging structure of tertiary air, it has the advantage in the aspect of the cement kiln deals with solid waste in coordination, it is higher to utilize hot-blast exchange to make the processing temperature, dwell time is longer, combustion process is more abundant, it changes stable control to burn the state, can dissolve and decompose income stove solid waste better, it is littleer to the operating mode influence of cement kiln, can effectively reduce the generation of harmful gas such as CO and nitrogen oxide in the processing, harmful organic matters such as dioxin will be thoroughly decomposed and obtain more effective control, really realize energy saving and emission reduction effect.
The utility model discloses an operation process as follows: semi-solid dangerous waste enters the stepped furnace body from the feeding pipeline 12, passes through the stepped platform structure 8 layer by layer to reach the feed opening 6 of the stepped furnace body, and in the process, high-temperature hot air in the tertiary air pipe 11 enters from the feed opening 6 of the stepped furnace, rises along the stepped furnace, and enters the middle-upper part in the decomposing furnace 10 through the hot air pipeline 9. Waste materials on each layer of platform in the process are preheated, dried and pre-incinerated under the participation of high-temperature hot air, caking materials or materials accumulated on the platform can be blown by a scattering device in a regular running mode and scattered and pushed down, the materials can be continuously rolled, light inflammable dangerous wastes are pushed to roll and then are incinerated along with air flow, heavier inflammable dangerous wastes fall on an incineration platform to be continuously preheated and pre-incinerated, finally the materials fall into a tertiary air platform to be further secondarily combusted by means of an impulse type air gun 4, hot air (tertiary air) with high oxygen content is introduced in the whole process, and the sufficiency of material incineration is further guaranteed. The material deepens to preheat step by step on a plurality of platforms, burns in advance, and then guarantees fully to burn. The final ash is fed into the rotary kiln through the decomposing furnace 10 and a kiln tail smoke chamber, mixed with hot raw materials fed into the kiln, and calcined at high temperature in the rotary kiln to form clinker. Flue gas generated by burning hazardous waste enters the decomposing furnace 10, is subjected to high-temperature burning treatment, and finally enters a raw material grinding and waste gas treatment system along with kiln tail flue gas through a high-temperature fan.
The above description is made for the exemplary purposes with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.
Claims (7)
1. Cement kiln handles useless outer hanging preheating of solid danger in coordination, precombustion step furnace device, its characterized in that: including locating ladder furnace body, hot-blast main (9) and feed pipe way (12) on tertiary tuber pipe (11), hot-blast main (9) both ends communicate decomposing furnace (10) respectively with air outlet (2) at ladder furnace body top, feed pipe way (12) intercommunication feed inlet (3) at ladder furnace body top, ladder furnace body bottom is equipped with and is connected to feed opening (6) of tertiary tuber pipe (11), the ladder furnace body includes furnace body (1) and locates the echelonment platform structure (8) of furnace body (1) one side, the back one side of leaning on of every layer of platform of echelonment platform structure (8) all is equipped with the orientation break-up device in furnace body (1), be equipped with insulating layer (7) on furnace body (1).
2. The cement kiln external-hanging preheating and pre-burning step furnace device for cooperative disposal of solid hazardous waste according to claim 1, characterized in that: the platform in the stepped platform structure (8) comprises a stockpiling platform arranged on the uppermost layer and a plurality of stages of incineration platforms arranged below the stockpiling platform in sequence from top to bottom, and the number of stages of the incineration platforms is not less than three.
3. The cement kiln external-hanging preheating and pre-burning step furnace device for cooperative disposal of solid hazardous waste according to claim 1, characterized in that: the dispersing device is a pulse type air cannon (4) which periodically sprays high-speed gas, and a spraying and blowing pipe of the pulse type air cannon (4) extends out of the furnace body (1) and is connected with a corresponding high-pressure gas source.
4. The cement kiln external-hanging preheating and pre-burning step furnace device for cooperative disposal of solid hazardous waste according to claim 1, characterized in that: the part of the front side of the furnace body (1) opposite to the stepped platform structure (8) is an inclined plane, the inclined direction of the inclined plane is consistent with the step extending direction of the stepped platform structure (8), and the inclined plane is connected with the upper end and the lower end of the furnace body (1) through a bevel and a vertical side wall.
5. The cement kiln external-hanging preheating and pre-burning step furnace device for cooperative disposal of solid hazardous waste according to claim 1, characterized in that: the part of the front side of the furnace body (1) opposite to the stepped platform structure (8) is in the shape of an arc surface arch, the upper end of the arc surface arch is tangent to the end surface of the upper end of the furnace body (1) and connected into a whole, and the lower end of the arc surface arch is tangent to the vertical side wall of the lower end of the furnace body (1) and connected into a whole.
6. The cement kiln external-hanging preheating and pre-burning step furnace device for cooperative disposal of solid hazardous waste according to claim 1, characterized in that: furnace body (1) front side is equipped with parameter acquisition module (13), including negative pressure table and thermocouple, furnace body (1) side still is equipped with a plurality of clear material mouths of observation (14) that can the switching, be equipped with observation window (5) on the clear material mouth of observation (14).
7. The cement kiln external-hanging preheating and pre-burning step furnace device for cooperative disposal of solid hazardous waste according to claim 1, characterized in that: the heat insulation layer (7) on the furnace body (1) is composed of a calcium silicate plate and a casting material and is fixed with the inner surface of the furnace body (1).
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| CN202122969202.5U CN216431725U (en) | 2021-11-30 | 2021-11-30 | External hanging type preheating and pre-burning step furnace device for cooperatively treating solid hazardous waste in cement kiln |
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| CN202122969202.5U CN216431725U (en) | 2021-11-30 | 2021-11-30 | External hanging type preheating and pre-burning step furnace device for cooperatively treating solid hazardous waste in cement kiln |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812202A (en) * | 2022-06-02 | 2022-07-29 | 自贡金龙水泥有限公司 | Feeding preheating bin and cement kiln waste treatment device and treatment method thereof |
| CN115307155A (en) * | 2022-08-27 | 2022-11-08 | 中材建设有限公司 | Vertical two-section incinerator and method for disposing complex combustible solid waste |
| CN115325544A (en) * | 2022-08-25 | 2022-11-11 | 中材建设有限公司 | Method for disposing complex combustible solid waste by adopting vertical sectional incinerator |
| CN117231988A (en) * | 2023-09-14 | 2023-12-15 | 山东美森资源综合利用有限公司 | Synchronous-feeding continuous dangerous waste feeding cement kiln incineration device and process |
-
2021
- 2021-11-30 CN CN202122969202.5U patent/CN216431725U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812202A (en) * | 2022-06-02 | 2022-07-29 | 自贡金龙水泥有限公司 | Feeding preheating bin and cement kiln waste treatment device and treatment method thereof |
| CN115325544A (en) * | 2022-08-25 | 2022-11-11 | 中材建设有限公司 | Method for disposing complex combustible solid waste by adopting vertical sectional incinerator |
| CN115307155A (en) * | 2022-08-27 | 2022-11-08 | 中材建设有限公司 | Vertical two-section incinerator and method for disposing complex combustible solid waste |
| CN117231988A (en) * | 2023-09-14 | 2023-12-15 | 山东美森资源综合利用有限公司 | Synchronous-feeding continuous dangerous waste feeding cement kiln incineration device and process |
| CN117231988B (en) * | 2023-09-14 | 2024-03-05 | 山东美森资源综合利用有限公司 | Synchronous-feeding continuous dangerous waste feeding cement kiln incineration device and process |
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