CN213983590U - Sludge drying and incinerating equipment - Google Patents
Sludge drying and incinerating equipment Download PDFInfo
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- CN213983590U CN213983590U CN202023133187.2U CN202023133187U CN213983590U CN 213983590 U CN213983590 U CN 213983590U CN 202023133187 U CN202023133187 U CN 202023133187U CN 213983590 U CN213983590 U CN 213983590U
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Abstract
The utility model discloses a sludge drying incineration equipment, including desiccator, mud buffer storehouse, fluidized bed incinerator, exhaust-heat boiler, conversion valve and flue gas processing system, mud buffer storehouse and fluidized bed incinerator all have two mud feed inlets, and the discharge gate of desiccator and the mummification mud feed inlet in mud buffer storehouse intercommunication, the mud discharge gate in mud buffer storehouse and fluidized bed incinerator's mummification mud feed inlet intercommunication, fluidized bed incinerator's exhaust port and exhaust-heat boiler's flue gas entry intercommunication, exhaust-heat boiler's high temperature steam export and the heat source import intercommunication of desiccator. High-temperature flue gas that produces during sludge incineration passes through exhaust-heat boiler and converts high-temperature steam into, can be used to the energy demand of anterior segment sludge drying process, need not additionally supply a large amount of energy, and the operation energy consumption is little. The utility model discloses a sludge drying incineration equipment has improved the treatment quality and the efficiency of mud, and process is simple, and is easy and simple to handle, can reduce sludge treatment cost moreover.
Description
Technical Field
The utility model relates to a mud innocent treatment technical field especially relates to a sludge drying incineration equipment.
Background
Sludge is a thick substance which is generated in the sewage treatment process and is between liquid and solid and has the characteristic of slurry state, is usually flocculent, has high water content and is easy to convey by a pump, but is difficult to carry out solid-liquid separation by natural sedimentation. The sludge not only contains toxic and harmful substances such as pathogenic bacteria, parasites (eggs), heavy metals, refractory organic matters and the like, but also contains N, P, K, Ca, organic matters and trace elements which are rich. It is an aggregate of many microbial micelles and various substances adsorbed by the microbial micelles.
Municipal sewage plants have a complex sludge composition, and generally the sludge has: the product contains many organic matters, is unstable in property, and is easy to be decomposed and smelly; the content of heavy metal and toxic and harmful pollutants is high, and a plurality of harmful substances are enriched in sludge in the sewage treatment process; the water content is high, and dehydration is not easy; contains more plant nutrients, has fertilizer effect and contains pathogenic bacteria and parasite eggs. Because of the large sludge yield of sewage plants, if the sludge is randomly stacked and is not effectively treated, the sludge causes great harm to the environment, human beings and animal health.
The principle followed by domestic and foreign sludge treatment is 'reduction, harmlessness, reclamation and stabilization'. At present, the main treatment and disposal methods of the sludge mainly comprise landfill, composting and incineration.
(1) The sanitary landfill of the sludge means that the landfill waste does not pollute the surrounding environment any more through scientific site selection and strict site protection treatment. The sanitary landfill is a mature sludge disposal technology, and the technology has the advantages of large sludge treatment capacity, low treatment cost and obvious effect; meanwhile, the method has many problems, such as that toxic and harmful substances in the filled pit pollute the underground water environment and the like, and further harm the health of people and livestock in the area. In addition, due to the large production of municipal sludge, sludge landfill sites meeting the conditions are less and less. The specific gravity of sludge landfill treatment is reduced year by year due to the need of large-area landfill sites, a large amount of transportation cost, foundation anti-seepage treatment and the like.
(2) The sludge contains organic matters, N, P, K and the like necessary for plant growth and various trace elements, such as Ca, Mg, Zn, Cu, Fe and the like, and can improve the soil structure and promote the growth of crops as farmland fertilizers. The composting treatment of the sludge has the advantages of capability of recycling nutrient elements in the sludge, low energy consumption and the like, but the sludge contains various toxic and harmful components and has the risks of pathogenic bacteria diffusion and heavy metal pollution.
(3) The incineration treatment of sludge is a high-temperature heat treatment technology for carrying out oxidative decomposition reaction on certain excess air and pretreated municipal sludge in an incinerator, and toxic and harmful substances in the sludge can be destroyed in high temperature due to oxidative pyrolysis. The main purpose of incineration is to make the sludge harmless and reduce the volume to the maximum extent, and to avoid secondary pollution as much as possible. However, the direct incineration of the dewatered sludge has too high energy consumption, a large amount of additional energy needs to be supplemented, and the risk of flue gas pollution exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sludge drying incinerator to solve the problem that proposes in the background art.
In order to achieve the purpose, the utility model provides a sludge drying incineration device, including desiccator, mud buffer bin, fluidized bed incinerator, exhaust-heat boiler, conversion valve and flue gas processing system, mud buffer bin and fluidized bed incinerator all have two mud feed inlets, the discharge gate of desiccator with the mummified mud feed inlet of mud buffer bin communicates, the mud discharge gate in mud buffer bin with the mummified mud feed inlet of fluidized bed incinerator communicate, the conversion valve with the wet sludge feed inlet in mud buffer bin and the wet sludge feed inlet of fluidized bed incinerator communicate respectively, the conversion valve is used for switching wet sludge to get into mix with mummified sludge in the mud buffer bin or directly get into in the fluidized bed incinerator; the exhaust port of the fluidized bed incinerator is communicated with the flue gas inlet of the waste heat boiler, the high-temperature steam outlet of the waste heat boiler is communicated with the heat source inlet of the dryer, the high-temperature flue gas in the fluidized bed incinerator enters the waste heat boiler, and the waste heat boiler generates high-temperature steam by utilizing the heat of the high-temperature flue gas to provide a heat source for drying sludge for the dryer; and the smoke outlet of the waste heat boiler is communicated with the smoke treatment system.
Further, the dryer is a paddle type dryer, and the paddle type dryer is used for mechanically drying wet sludge with the water content of 75% -90% until the water content is 30% -40%.
Further, a stirring device for uniformly mixing the dried sludge conveyed by the dryer and the wet sludge conveyed by the sludge conveying device is arranged in the sludge buffer bin.
Further, the fluidized bed incinerator is a bubbling fluidized bed incinerator, and a slag discharge port is arranged at the bottom of the bubbling fluidized bed incinerator.
Furthermore, the flue gas treatment system comprises a cyclone dust collector, an electrostatic dust collector, a semi-dry deacidification tower, a bag-type dust collector, a wet deacidification tower and a flue gas reheater which are sequentially arranged along the circulation direction of the flue gas.
Furthermore, the sludge drying and incinerating equipment further comprises a biogas boiler, a high-temperature steam outlet of the biogas boiler is communicated with a heat source inlet of the dryer, and the biogas boiler generates high-temperature steam by burning biogas to provide a standby heat source for the dryer.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the sludge can be directly dried to the water content of 30-40% by arranging the drier, the sludge volume is reduced, the treatment capacity of subsequent sludge incineration equipment is greatly reduced, and the investment is reduced; the sludge buffer bin is used for uniformly mixing the received dried sludge and wet sludge so as to achieve the sludge inlet water content and the set heat value set by the fluidized bed incinerator, and the sludge can achieve self-sustaining combustion in the incinerator. High-temperature flue gas that produces during sludge incineration passes through exhaust-heat boiler and converts high-temperature steam into, can be used to the energy demand of anterior segment sludge drying process, need not additionally supply a large amount of energy, and the operation energy consumption is little. The utility model discloses a sludge drying incineration equipment has improved the treatment quality and the efficiency of mud, and process is simple, and is easy and simple to handle, can reduce sludge treatment cost moreover.
(2) The utility model discloses a sludge drying incineration equipment, the volume of reduction municipal sludge that can be by the greatest extent has solved the defect that needs occupy a large amount of spaces in other methods, and is vital to practicing thrift land resource.
(3) After sludge is subjected to drying incineration by the sludge drying incineration equipment, organic matters and the like are decomposed, only incineration residues with the original sludge amount of about 10% are left, and the sludge reduction is obvious; the incineration residue can be further recycled, such as being processed into building materials through secondary utilization and the like, and has good social value.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic structural view of a sludge drying and incinerating apparatus according to the present invention;
FIG. 2 is a schematic structural view of a flue gas treatment system of the present invention;
the system comprises a sludge conveying device, a 5-dryer, a 6-sludge buffer bin, a 7-fluidized bed incinerator, an 8-waste heat boiler, a 9-conversion valve, a 10-biogas boiler, an 11-flue gas treatment system, an 11.1-cyclone dust collector, an 11.2-electrostatic dust collector, an 11.3-semidry deacidification tower, an 11.4-bag dust collector, an 11.5-wet deacidification tower and an 11.6-flue gas reheater.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1, the present embodiment provides a sludge drying and incinerating apparatus, which includes a dryer 5, a sludge buffer bin 6, a fluidized bed incinerator 7, a waste heat boiler 8, a conversion valve 9, and a flue gas treatment system 11. Wherein, the sludge buffer bin 6 and the fluidized bed incinerator 7 are both provided with two sludge feeding holes, and wet sludge with the water content of 75-90 percent can be directly conveyed into the dryer 5 through the sludge conveying device 4. Preferably, the dryer 5 is a paddle dryer, wet sludge is stirred and pushed by the paddle in the paddle dryer, and gradually moves from the feed port to the discharge port, and is dried until the moisture content is 30-40%, and then is discharged from the discharge port. In the drying process, wet sludge and steam are subjected to indirect heat exchange, moisture in the wet sludge is quickly evaporated out and enters a condenser, and the moisture is condensed and discharged through indirect heat exchange with cooling circulating water. In the structural arrangement, the drier can directly dry the sludge to the moisture content of 30-40% and surpass the sludge viscous range, thereby facilitating the subsequent sludge conveying. The dried sludge enters a sludge buffer bin 6. Wet sludge can also be directly conveyed into the sludge buffer bin 6 through the conveying device 4 to be mixed with the dried sludge.
In the preferred embodiment of the present invention, the sludge buffer 6 mainly receives the dried sludge from the paddle dryer, and simultaneously receives the wet sludge from the sludge high-level bin 3, and uniformly mixes the dried sludge and the wet sludge to reach the sludge water content and the heat value of the bubbling fluidized bed incinerator 7. The sludge buffer bin is arranged, so that the moisture content and the heat value of sludge entering the incinerator can be flexibly adjusted, and the uniform feeding and stable combustion of the incinerator are ensured.
In the preferred embodiment of the present invention, the dried sludge and the wet sludge are uniformly mixed in the sludge buffer bin 6 and then fully combusted in the fluidized bed incinerator 7, preferably, the fluidized bed incinerator 7 is a bubbling fluidized bed incinerator. A suspended burning area is arranged in a hearth of the bubbling fluidized bed incinerator. The sludge is fully combusted in the bubbling fluidized bed incineration area, organic matters are decomposed, and water is evaporated. The residence time of the flue gas in the incinerator at the temperature higher than 850 ℃ is more than 2 seconds, and then the flue gas enters the waste heat boiler 8 through the flue. The lower part of the bubbling fluidized bed incinerator is conical, so that slag is convenient to discharge, the final incineration residue amount is about 10% of the original sludge amount, and the sludge reduction is obvious.
In the preferred embodiment of the utility model, the bubbling fluidized bed incinerator is provided with two sludge feeding ports, and one sludge drying port for the sludge buffer bin 6 is arranged in the bubbling fluidized bed incinerator; the other wet sludge can directly enter the bubbling fluidized bed incinerator through a conveying device 4 and surpass a paddle dryer 5. The bubbling fluidized bed incinerator is provided with two sludge inlets so as to realize uniform feeding and stable combustion.
The utility model discloses in the embodiment of preferred, the wet sludge feed inlet of mud buffering storehouse and the wet sludge feed inlet of fluidized bed incinerator all communicate with sludge conveying device 4 through conversion valve 9, and through the switching of conversion valve 9, wet mud also can select to get into mud buffering storehouse 6 and mummification mud through sludge conveying device 4 and mix or select directly to get into bubbling fluidized bed incinerator.
In the preferred embodiment of the present invention, the smoke outlet of the fluidized bed incinerator 7 is connected to the smoke inlet of the exhaust-heat boiler 8, and the high temperature steam outlet of the exhaust-heat boiler 8 is connected to the heat source inlet of the dryer. High-temperature flue gas in the fluidized bed incinerator enters a waste heat boiler 8, and the waste heat boiler generates high-temperature steam by utilizing heat of the high-temperature flue gas to provide a heat source for drying sludge for a dryer. Namely, the heat source for drying the sludge by the paddle type dryer comes from high-temperature flue gas generated by burning the sludge by the bubbling fluidized bed incinerator, and high-temperature steam generated by recovering heat by the waste heat boiler 8. Further, the sludge drying incineration equipment can be further provided with a biogas boiler 10 as a standby heat source, and the biogas boiler can generate high-temperature steam by burning biogas and provide the high-temperature steam for the paddle type dryer to serve as a heat source.
In the preferred embodiment of the present invention, the flue gas outlet of the exhaust-heat boiler is communicated with the flue gas treatment system. As shown in fig. 2, the flue gas treatment system comprises a cyclone dust collector 11.1, an electrostatic dust collector 11.2, a semidry deacidification tower 11.3, a bag-type dust collector 11.4, a wet deacidification tower 11.5 and a flue gas reheater 11.6 which are sequentially arranged along the circulation direction of the flue gas. Flue gas of the waste heat boiler sequentially enters a cyclone dust collector, an electrostatic dust collector, a semi-dry deacidification tower, a bag-type dust collector, a wet deacidification tower and a flue gas reheater for two-stage dust removal and two-stage deacidification treatment, and is discharged through a chimney after reaching standards.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The sludge drying incineration equipment is characterized by comprising a dryer (5), a sludge buffering bin (6), a fluidized bed incinerator (7), a waste heat boiler (8), a conversion valve (9) and a flue gas treatment system (11), wherein the sludge buffering bin and the fluidized bed incinerator are respectively provided with two sludge feeding holes, a discharging hole of the dryer is communicated with a dried sludge feeding hole of the sludge buffering bin, a sludge discharging hole of the sludge buffering bin is communicated with a dried sludge feeding hole of the fluidized bed incinerator, the conversion valve is respectively communicated with a wet sludge feeding hole of the sludge buffering bin and a wet sludge feeding hole of the fluidized bed incinerator, and the conversion valve is used for switching wet sludge to enter the sludge buffering bin to be mixed with sludge drying or directly enter the fluidized bed incinerator; the smoke outlet of the fluidized bed incinerator is communicated with the smoke inlet of the waste heat boiler, the high-temperature steam outlet of the waste heat boiler is communicated with the heat source inlet of the dryer, the high-temperature smoke in the fluidized bed incinerator enters the waste heat boiler, and the waste heat boiler generates high-temperature steam by utilizing the heat of the high-temperature smoke and provides a heat source for drying sludge for the dryer; and the smoke outlet of the waste heat boiler is communicated with the smoke treatment system.
2. The sludge drying and incinerating device according to claim 1, wherein the dryer is a paddle dryer, and the paddle dryer is used for mechanically drying wet sludge with a water content of 75% -90% until the water content is 30% -40%.
3. The sludge drying and incinerating device according to claim 1, wherein a stirring device for uniformly mixing the dried sludge conveyed by the dryer and the wet sludge conveyed by the sludge conveying device (4) is arranged in the sludge buffer bin.
4. The sludge drying incineration device as claimed in claim 1, wherein the fluidized bed incinerator is a bubbling fluidized bed incinerator, and a slag discharge port is arranged at the bottom of the bubbling fluidized bed incinerator.
5. The sludge drying incineration equipment according to the claim 1, wherein the flue gas treatment system comprises a cyclone dust collector (11.1), an electrostatic dust collector (11.2), a semi-dry deacidification tower (11.3), a bag-type dust collector (11.4), a wet deacidification tower (11.5) and a flue gas reheater (11.6) which are arranged in sequence along the circulation direction of the flue gas.
6. The sludge drying incineration device according to any one of claims 1 to 5, further comprising a biogas boiler (10), wherein a high-temperature steam outlet of the biogas boiler is communicated with a heat source inlet of the dryer, and the biogas boiler generates high-temperature steam by burning biogas to provide a standby heat source for the dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023133187.2U CN213983590U (en) | 2020-12-23 | 2020-12-23 | Sludge drying and incinerating equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023133187.2U CN213983590U (en) | 2020-12-23 | 2020-12-23 | Sludge drying and incinerating equipment |
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| CN213983590U true CN213983590U (en) | 2021-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116146987A (en) * | 2023-04-20 | 2023-05-23 | 浙江百能科技有限公司 | Device and method for incinerating and disposing gasification filter cake |
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2020
- 2020-12-23 CN CN202023133187.2U patent/CN213983590U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116146987A (en) * | 2023-04-20 | 2023-05-23 | 浙江百能科技有限公司 | Device and method for incinerating and disposing gasification filter cake |
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