CN213577516U - On-spot distributed independent system of burning - Google Patents
On-spot distributed independent system of burning Download PDFInfo
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- CN213577516U CN213577516U CN202022726333.6U CN202022726333U CN213577516U CN 213577516 U CN213577516 U CN 213577516U CN 202022726333 U CN202022726333 U CN 202022726333U CN 213577516 U CN213577516 U CN 213577516U
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Abstract
The present application relates to an in-situ distributed independent incineration system, comprising: a strip-shaped or granular dried sludge supply device, and an incinerator, a waste heat boiler, a bag-type dust collector, a spray tower and a gas discharge device which are communicated in sequence; the feed end of the dried sludge supply device is connected with the inlet of the incinerator; and an ejector is arranged on a pipeline communicated between the waste heat boiler and the bag-type dust collector. The ejector can adsorb pollutants, and the ejector is matched with a bag-type dust collector, so that the emission of dioxin can reach the standard, quenching facilities such as a quenching tower do not need to be additionally arranged, and the energy of flue gas can be recovered to the maximum extent; and according to the actual content of the acid gas in the flue gas, a spray tower is adopted to ensure the removal efficiency of the acid gas; the sludge can be reduced to the maximum extent, the sludge transportation cost is saved, and the secondary pollution problem in the sludge transportation process is avoided.
Description
Technical Field
The application relates to municipal sludge treatment field especially relates to a system of independently burning of dispersion on spot.
Background
Sludge treatment is an important component of urban sewage treatment systems. Incineration is one of the main directions for sludge treatment because of its remarkable advantages of high treatment speed, small floor space, no need of long-term storage, etc.
At present, municipal sludge is independently incinerated mainly in a centralized incineration mode and a local distributed incineration mode. For the concentrated incineration mode, there are major problems: the sludge has high water content, large volume and expensive transportation cost; the sludge is rich in organic matters, is easy to rot and smell, and can cause secondary pollution in the transportation process; different sewage plants have different treatment processes, the sludge properties and the water content are greatly different, and the centralized incineration is inconvenient. For the distributed-in-place mode of incineration, the main problems are: municipal sludge and industrial sludge are not distinguished, and refer to a hazardous waste incineration process, so that the investment and operation cost are too high.
In China, small and medium-scale sewage treatment plants are numerous and widely distributed, municipal sludge is different from most of industrial sludge and belongs to general industrial solid waste, and in order to solve the technical problems, a local distributed independent incineration system special for the municipal sludge is urgently needed to be researched and developed.
Disclosure of Invention
In order to solve the above technical problem or at least partially solve the above technical problem, the present application provides an in-situ decentralized stand-alone incineration system.
The application provides an independent incineration system of on-site dispersion formula, independent incineration system of on-site dispersion formula includes: a strip-shaped or granular dried sludge supply device, and an incinerator, a waste heat boiler, a bag-type dust collector, a spray tower and a gas discharge device which are communicated in sequence; the feed end of the dried sludge supply device is connected with the inlet of the incinerator; an ejector is arranged on a pipeline communicated between the waste heat boiler and the bag-type dust collector; the ejector is used for ejecting an adsorbing material capable of adsorbing pollutants into the pipeline.
Optionally, the dried sludge supply device comprises a belt type drying machine, a drying bin and a feeder which are connected in sequence; a slitter is arranged in the belt type drying machine.
Optionally, the feeder is provided with a screw feeding structure.
Optionally, the exhaust-heat boiler is further provided with a steam outlet, and the steam outlet is used for providing steam for the belt type drying machine.
Optionally, the spray tower is one-stage or multi-stage; the adsorption material comprises activated carbon and slaked lime.
Optionally, the incinerator comprises a rotary kiln and a secondary combustion chamber which are communicated; the inclination of the rotary kiln is 1% -5%, and the rotating speed is 0.2-1.5 revolutions per minute; the material moving direction in the rotary kiln is the same as the air flow direction.
Optionally, the second combustion chamber is provided with a slag tapping system, an ignition and combustion-supporting system and an emergency discharge chimney; the slag tapping system is arranged at the bottom of the secondary combustion chamber; the emergency discharge chimney is arranged at the top of the secondary combustion chamber, and the ignition and combustion-supporting system is arranged close to the bottom of the secondary combustion chamber.
Optionally, the second combustion chamber is provided with a fire-resistant layer and an insulating layer.
Optionally, the gas discharge device comprises a draft fan and a chimney which are communicated with each other; the draught fan is arranged between the chimney and the spray tower.
Optionally, the export of rotary kiln with the mud entry intercommunication of second combustion chamber, the exhanst gas outlet of second combustion chamber with exhaust-heat boiler's flue gas entry intercommunication, exhaust-heat boiler's exhanst gas outlet with the flue gas entry intercommunication of sack cleaner, exhaust-heat boiler's exhanst gas outlet with the flue gas entry intercommunication of spray column, the exhanst gas outlet of spray column with draught fan entry intercommunication, draught fan export and chimney intercommunication.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
in the in-situ distributed independent incineration system provided by the embodiment of the application, after energy of flue gas is recovered through the waste heat boiler, pollutants such as dioxin, heavy metals and partial acidic gas can be adsorbed through the ejector on the flue gas pipeline before the flue gas enters the bag-type dust remover, and the bag-type dust remover can ensure that the dioxin discharge reaches the standard without adding quenching facilities such as a quenching tower and the like, so that the energy of the flue gas can be recovered to the maximum extent; and according to the actual content of the acidic gas in the flue gas, the spray tower is adopted to ensure the removal efficiency of the acidic gas, thereby realizing the in-situ reduction of the sludge to the maximum extent, saving the transportation cost of the sludge, avoiding the problem of secondary pollution in the transportation process of the sludge, and aiming at the municipal sludge incineration design, reducing the investment and the operation cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
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, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic view of an in situ decentralized stand-alone incineration system as provided in various embodiments of the present application.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a system independently burns in scattered formula on spot, as shown in figure 1, system independently burns in scattered formula on spot includes: a strip-shaped or granular dried sludge supply device, and an incinerator, a waste heat boiler 6, a bag-type dust collector 8, a spray tower 9 and a gas discharge device which are communicated in sequence; the feed end of the dried sludge supply device is connected with the inlet of the incinerator; an ejector 7 is arranged on a pipeline communicated between the waste heat boiler and the bag-type dust collector; the ejector is used for ejecting an adsorbing material capable of adsorbing pollutants into the pipeline. The dried sludge supply device comprises a belt type drying machine 1, a dry material bin 2 and a feeder 3 which are connected in sequence; a slitter is arranged in the belt type drying machine. The incinerator comprises a rotary kiln 4 and a secondary combustion chamber 5 which are communicated with each other. The gas discharge device comprises an induced draft fan 10 and a chimney 11. The adsorbent material may include activated carbon and slaked lime.
In the in-situ distributed independent incineration system provided by the utility model, after the flue gas recovers energy through the waste heat boiler, the flue gas can adsorb pollutants such as dioxin, heavy metals and partial acid gas through the ejector on the flue gas pipeline before entering the bag-type dust remover, and the bag-type dust remover is matched with the flue gas, so that the dioxin discharge can reach the standard, and the flue gas energy can be recovered to the maximum extent without arranging quenching facilities such as a quenching tower; and according to the actual content of the acidic gas in the flue gas, the spray tower is adopted to ensure the removal efficiency of the acidic gas, thereby realizing the in-situ reduction of the sludge to the maximum extent, saving the transportation cost of the sludge, avoiding the problem of secondary pollution in the transportation process of the sludge, and aiming at the municipal sludge incineration design, reducing the investment and the operation cost.
In some embodiments, the dried sludge supply device comprises a belt dryer, a drying bin and a feeder which are connected in sequence; a slitter is arranged in the belt type drying machine. Wherein the feeder is provided with a spiral feeding structure. In detail, wet sludge is fed into an inlet of a belt type drying machine, a slitter is arranged in the belt type drying machine, sludge coming out of the belt type drying machine is in a long strip shape or a granular shape, the water content is between 20% and 50%, dry sludge is fed into a dry material bin from an outlet of the belt type drying machine, the sludge in the dry material bin is fed into a hopper at the top of a feeder through a bucket elevator, and the sludge is fed into an inlet of an incinerator through a spiral structure in the feeder. The belt type drier with the slitter is adopted, the dried sludge is in a strip shape or a granular shape and is matched with low-speed air distribution in the rotary kiln, and pre-dedusting equipment is not needed during flue gas purification.
Optionally, the exhaust-heat boiler is further provided with a steam outlet, and the steam outlet is used for providing steam for the belt type drying machine. Thereby ensuring that the steam generated by incineration can be used as the energy of the drier and reducing the energy consumption of sludge drying.
In some embodiments, the incinerator comprises a rotary kiln and a secondary combustion chamber in communication with each other; the inclination of the rotary kiln is 1% -5%, and the rotating speed is 0.2-1.5 revolutions per minute; the material moving direction in the rotary kiln is the same as the air flow direction.
In detail, the incinerator adopts a rotary kiln with a second combustion chamber, the temperature of the rotary kiln is controlled to be 500-700 ℃, the flow direction of flue gas in the rotary kiln is the same as the movement direction of materials, and the retention time of the materials is 20-60 min. The temperature of the second combustion chamber is controlled to be 850-1000 ℃, and the residence time of the flue gas is more than 2 s. The rotary kiln is internally provided with a fire-resistant layer and a heat-insulating layer, the inclination of the rotary kiln is designed to be 1% -5%, and the designed rotating speed is 0.2-1.5 revolutions per minute.
The rotary kiln with the secondary combustion chamber is adopted, the gas phase flow direction and the solid phase flow direction (namely the material flow direction) in the rotary kiln are the same, the combustion share of the combustible components of the sludge in the rotary kiln and the secondary air in the secondary combustion chamber can be controlled by adjusting the proportion of primary air in the rotary kiln and secondary air in the secondary combustion chamber, the temperature of the secondary combustion chamber is controlled to be more than 850 ℃, the sludge is completely burnt, the consumption of auxiliary fuel can be effectively reduced, and the operation cost is reduced.
The secondary combustion chamber is provided with a slag tapping system, an ignition and combustion-supporting system and an emergency discharge chimney; the slag tapping system is arranged at the bottom of the secondary combustion chamber; the emergency discharge chimney is arranged at the top of the secondary combustion chamber, and the ignition and combustion-supporting system is arranged close to the bottom of the secondary combustion chamber. And the second combustion chamber is provided with a flame retardant coating and an insulating layer. That is to say, the second combustion chamber is internally provided with a fire-resistant layer and a heat-insulating layer, the bottom of the second combustion chamber is provided with a slag discharging system, the lower part of the second combustion chamber is provided with an ignition and combustion-supporting system, and the top of the second combustion chamber is provided with an emergency discharge chimney.
Optionally, the gas discharge device comprises an induced draft fan and a chimney; the draught fan is arranged between the chimney and the spray tower. Wherein, the draught fan adopts stainless steel material, and the draught fan is arranged behind the spray column, can reduce the corruption of acid gas in the flue gas to the draught fan. Meanwhile, one-stage or multi-stage spray towers can be arranged according to the content of acid gas in the flue gas.
In some embodiments, the export of rotary kiln with the mud entry intercommunication of second combustion chamber, the exhanst gas outlet of second combustion chamber with exhaust-heat boiler's flue gas entry intercommunication, exhaust-heat boiler's exhanst gas outlet with the flue gas entry intercommunication of sack cleaner, exhaust-heat boiler's exhanst gas outlet with the flue gas entry intercommunication of spray column, the exhanst gas outlet of spray column with draught fan entry intercommunication, draught fan export and chimney intercommunication.
The present invention provides a distributed independent incineration system in situ, which is briefly described below with an embodiment. As shown in fig. 1, the in-situ distributed independent incineration system for municipal sludge treatment comprises a belt type drier 1, a dry material bin 2, a feeder 3, a rotary kiln 4, a secondary combustion chamber 5, a waste heat boiler 6, an ejector 7, a bag-type dust collector 8, a spray tower 9, an induced draft fan 10, a chimney and the like.
Wet mud is dried by a belt type drier 1 to become strip-shaped or granular dry mud with the water content of 20-50%, the dry mud enters a dry bin 2 for storage, and is conveyed into a hopper at the upper part of a feeder 3 by a bucket elevator or a screw conveyor and other conveying equipment, the dry mud is conveyed into the kiln tail of a rotary kiln 4 by the feeder 3, slowly moves towards the kiln head in the rotary kiln 4, sequentially passes through drying, pyrolysis and combustion stages, the temperature in the rotary kiln 4 is controlled to be 500-700 ℃, flue gas and residues generated in the rotary kiln 4 enter a secondary combustion chamber 5, the residues are thoroughly burnt and then discharged from a slag extractor at the bottom of the secondary combustion chamber 5, the residues enter an ash bin for storage, the residence time of the flue gas in the secondary combustion chamber 5 is ensured to be more than 2s, combustible components in the flue gas are fully combusted in the secondary combustion chamber 5, the temperature of the secondary combustion chamber 5 is kept to be 850. High-temperature flue gas from the secondary combustion chamber 5 enters the waste heat boiler 6 for heat exchange, the temperature of the flue gas is reduced to 150-300 ℃, steam generated by the waste heat boiler 6 can be used as energy of the belt type drier 1, and ash collected at the bottom of the waste heat boiler 6 is sent to the ash bin for storage. Flue gas from the waste heat boiler 6 enters a bag-type dust collector 8, an activated carbon and slaked lime injector 7 is arranged on a flue gas pipeline between the waste heat boiler 6 and the bag-type dust collector 8, and fly ash in the flue gas is captured and collected after the flue gas passes through the bag-type dust collector 8 and is sent to a fly ash bin for storage. The flue gas from the bag-type dust collector 8 enters a spray tower 9 for deacidification, and is sent into a chimney 11 through a draught fan 10 and discharged from the top of the chimney 11.
The utility model provides a can be specially to the independent system of burning of distributed on spot of municipal sludge, improve and optimize current system of burning, including following several:
(1) the rotary kiln with two combustion chambers is adopted, the gas phase flow direction and the solid phase flow direction in the rotary kiln are the same, the combustion share of sludge combustible components in the rotary kiln and the secondary air in the secondary chamber can be controlled by adjusting the proportion of primary air in the rotary kiln and secondary air in the secondary chamber, the temperature of the secondary chamber is controlled to be more than 850 ℃, the sludge incineration is ensured to be thorough, the consumption of auxiliary fuel can be effectively reduced, and the operation cost is reduced.
(2) The belt type drier with the slitter is adopted, the dried sludge is in a strip shape or a granular shape and is matched with low-speed air distribution in the rotary kiln, and pre-dedusting equipment is not needed during flue gas purification.
(3) According to the characteristics of municipal sludge as common industrial solid waste, an activated carbon and a slaked lime injector are additionally arranged on a flue gas pipeline before entering a bag-type dust collector, pollutants such as dioxin, heavy metals and partial acid gas can be adsorbed, the emission of the dioxin can be ensured to reach the standard by matching with the bag-type dust collector, quenching facilities such as a quenching tower do not need to be additionally arranged, and the flue gas energy can be recovered to the maximum extent.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. An on-site dispersion type independent incineration system, characterized in that the on-site dispersion type independent incineration system comprises: a strip-shaped or granular dried sludge supply device, and an incinerator, a waste heat boiler, a bag-type dust collector, a spray tower and a gas discharge device which are communicated in sequence; the feed end of the dried sludge supply device is connected with the inlet of the incinerator; an ejector is arranged on a pipeline communicated between the waste heat boiler and the bag-type dust collector; the ejector is used for ejecting an adsorbing material capable of adsorbing pollutants into the pipeline.
2. The locally-distributed independent incineration system according to claim 1, wherein the dried sludge supply device comprises a belt type drying machine, a drying bin and a feeder which are connected in sequence; a slitter is arranged in the belt type drying machine.
3. Locally decentralized self-contained incineration system according to claim 2, characterized in that the feeder is provided with a screw feeding structure.
4. The locally decentralized independent incineration system according to claim 2, wherein the waste heat boiler is further provided with a steam outlet for providing steam to the belt dryer.
5. The locally decentralized stand alone incineration system according to any one of claims 1 to 4, wherein the spray tower is one or more stages; the adsorption material comprises activated carbon and slaked lime.
6. The locally decentralized stand alone incineration system according to any one of claims 1 to 4, wherein the incinerator comprises a rotary kiln and a secondary combustion chamber in communication; the inclination of the rotary kiln is 1% -5%, and the rotating speed is 0.2-1.5 revolutions per minute; the material moving direction and the air flow direction in the rotary kiln are the same; the inlet of the rotary kiln constitutes the inlet of the incinerator.
7. The locally decentralized independent incineration system according to claim 6, characterised in that the secondary combustion chamber is provided with a slag tapping system, an ignition and combustion supporting system and an emergency discharge chimney; the slag tapping system is arranged at the bottom of the secondary combustion chamber; the emergency discharge chimney is arranged at the top of the secondary combustion chamber, and the ignition and combustion-supporting system is arranged close to the bottom of the secondary combustion chamber.
8. The in-situ decentralized self-contained incineration system according to claim 6, characterised in that the secondary combustion chamber is lined with a fire resistant layer and an insulation layer.
9. The in-situ decentralized stand alone incineration system according to claim 6, wherein the gas emitting means comprises a draft fan and a chimney in communication; the draught fan is arranged between the chimney and the spray tower.
10. The in-situ distributed independent incineration system according to claim 9, wherein the outlet of the rotary kiln is communicated with the sludge inlet of the secondary combustion chamber, the fume outlet of the secondary combustion chamber is communicated with the fume inlet of the exhaust-heat boiler, the fume outlet of the exhaust-heat boiler is communicated with the fume inlet of the bag-type dust remover, the fume outlet of the exhaust-heat boiler is communicated with the fume inlet of the spray tower, the fume outlet of the spray tower is communicated with the inlet of the induced draft fan, and the outlet of the induced draft fan is communicated with a chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022726333.6U CN213577516U (en) | 2020-11-23 | 2020-11-23 | On-spot distributed independent system of burning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022726333.6U CN213577516U (en) | 2020-11-23 | 2020-11-23 | On-spot distributed independent system of burning |
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| CN213577516U true CN213577516U (en) | 2021-06-29 |
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| CN202022726333.6U Active CN213577516U (en) | 2020-11-23 | 2020-11-23 | On-spot distributed independent system of burning |
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Effective date of registration: 20220916 Address after: Room 107, building a, Lugu science and technology innovation and entrepreneurship Park, 1698 Lugu West Avenue, Changsha hi tech Development Zone, Hunan 410200 Patentee after: Hunan Qingyuan Huajian Environmental Technology Co.,Ltd. Address before: No.2 workshop of Hunan Central Research Institute of Nonferrous Metals Co., Ltd., 339 Wangcheng Avenue, Wangcheng economic and Technological Development Zone, Changsha, Hunan 410000 Patentee before: Hunan Qingyuan Intelligent Manufacturing Equipment Co.,Ltd. |
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