CN211781132U - Sludge pre-drying direct-charging mixed combustion system suitable for circulating fluidized bed boiler - Google Patents
Sludge pre-drying direct-charging mixed combustion system suitable for circulating fluidized bed boiler Download PDFInfo
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- CN211781132U CN211781132U CN202020356649.8U CN202020356649U CN211781132U CN 211781132 U CN211781132 U CN 211781132U CN 202020356649 U CN202020356649 U CN 202020356649U CN 211781132 U CN211781132 U CN 211781132U
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Abstract
The utility model discloses a sludge pre-drying direct-entering mixed combustion system suitable for a circulating fluidized bed boiler, which comprises a wet sludge bin, a pre-drying device, a dry sludge storage bin, a coal conveying belt, a sludge distribution belt, a front sludge bin, a rotary blockage removal device, a furnace feeding screw, a blanking pipe and a circulating fluidized bed boiler; the outlet of the wet sludge bin is communicated with the inlet of the circulating fluidized bed boiler through the pre-drying device, the dry sludge storage bin, the coal conveying belt, the sludge distribution belt, the furnace front sludge bin, the rotary blockage removal device, the furnace feeding screw and the blanking pipe in sequence, the system can achieve the purpose of simultaneously treating wet sludge with the water content of 70% -85% and wet sludge with the water content of 50% -65%, and the treatment cost is low.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, a direct income stove of mud predrying is mixed and is burnt system suitable for circulating fluidized bed boiler is related to.
Background
In recent years, the problem of 'sludge enclosing city' is more serious, and the development of sludge disposal technology is not slow. Compared with the traditional sanitary landfill, agricultural utilization, ocean disposal, building material utilization and the like, the sludge incineration is the most thorough sludge treatment mode and has the outstanding advantages of high treatment speed, high reduction degree, resource reutilization and the like.
For a sewage treatment plant, the sludge incineration technology needs to build an incinerator and a tail gas purification treatment system, so that the project investment is large, the operation cost is high, and the economy is poor. The coal-fired boiler is a natural sludge incinerator, and particularly, the circulating fluidized bed boiler has the advantages of wide fuel adaptability, high combustion efficiency, low pollutant discharge and the like.
According to the sludge mixing burning mode, the sludge burning can be divided into two modes of directly feeding wet sludge into a furnace for mixing burning and burning after drying the wet sludge. The sludge drying and incinerating technology is that wet sludge with water content of about 80% is dried to below 40% through a newly built sludge drying system and then incinerated in a furnace. The traditional wet sludge direct-to-furnace blending combustion technology is characterized in that wet sludge with the water content lower than 65% is mixed with fire coal by a coal conveying system of a power plant and then is fed into a boiler; for wet sludge with water content higher than 70%, the sludge is in a thick slurry state and can only be fed into a boiler by adopting a special sludge screw pump.
The conventional wet sludge directly enters a furnace co-combustion system and can only treat sludge with a water content range (such as 50-65% or 70-85%). In the current engineering application field, a direct-in-furnace co-firing technology is generally adopted for wet sludge with the water content of 50% -65%. For wet sludge with the water content of 70-85%, the wet sludge is generally dried by a sludge drying system until the water content is below 40% and then is incinerated in a furnace, and at the moment, a sludge drying system needs to be newly built, so that the equipment investment of the drying system is large, the energy consumption of a heat source is large and the operation cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a mud predrying directly goes into stove and mixes system of burning suitable for circulating fluidized bed boiler, this system can realize handling the moisture content simultaneously and be 70% ~ 85% wet mud and the moisture content is 50% ~ 65% wet mud's purpose, and treatment cost is lower.
In order to achieve the purpose, the sludge pre-drying direct-to-furnace blending combustion system suitable for the circulating fluidized bed boiler comprises a wet sludge bin, pre-drying equipment, a dry sludge storage bin, a coal conveying belt, a sludge distribution belt, a furnace front sludge bin, a rotary blockage removal device, a furnace feeding screw, a blanking pipe and the circulating fluidized bed boiler;
the outlet of the wet sludge bin is communicated with the inlet of the circulating fluidized bed boiler through a predrying device, a dry sludge storage bin, a coal conveying belt, a sludge distribution belt, a front sludge bin, a rotary blockage removing device, a furnace feeding screw and a blanking pipe in sequence.
The sludge pre-drying system also comprises a sludge pre-drying workshop, wherein the wet sludge bin, the pre-drying equipment and the dry sludge storage bin are all located in the sludge pre-drying workshop.
And an air outlet of the sludge pre-drying workshop is communicated with the circulating fluidized bed boiler through a negative pressure fan and a booster fan.
The wet sludge bin is communicated with the pre-drying device through wet sludge conveying equipment.
The pre-drying equipment is communicated with the dry sludge storage bin through a dry sludge discharge conveying device.
The dry sludge storage bin is connected with a coal conveying belt through a dry sludge conveying device.
The pre-drying equipment dries the wet sludge with the water content of 70-85 percent to 50-65 percent, and a plate-and-frame filter press, a high-pressure belt filter press or other mechanical drying machines can be adopted.
The utility model discloses following beneficial effect has:
sludge predrying directly goes into stove and mixes burning system suitable for circulating fluidized bed boiler when concrete operation, the moisture content 70% ~ 85% wet sludge that send out sewage treatment plant is through predrying equipment mummification to moisture content 50% ~ 65%, send into dry sludge storage storehouse with the direct moisture content 50% ~ 65%'s that send out of sewage treatment plant together again, then add storehouse system and sludge incineration system through mummification mud and handle that sludge burns, in order to realize the mesh of simultaneous processing moisture content for the wet sludge of 70% ~ 85% and moisture content for the wet sludge of 50% ~ 65%, the system is simple, operational reliability is high, treatment cost is lower.
Furthermore, the wet sludge bin, the pre-drying device and the dry sludge storage bin are all located in a sludge pre-drying workshop, an air outlet of the sludge pre-drying workshop is communicated with the circulating fluidized bed boiler through a negative pressure fan and a booster fan, and odor generated in the treatment process is directly sent into the circulating fluidized bed boiler to be combusted, so that the odor-free discharge of the whole sludge treatment process of the power plant is realized.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a wet sludge bin, 2 is a wet sludge conveying device, 3 is a pre-drying device, 4 is a dry sludge discharging and conveying device, 5 is a dry sludge storage bin, 6 is a dry sludge conveying device, 7 is a coal conveying belt, 8 is a sludge distribution belt, 9 is a furnace front sludge bin, 10 is a rotary blockage removal device, 11 is a furnace inlet spiral, 12 is a blanking pipe, 13 is a circulating fluidized bed boiler, 14 is a negative pressure fan, 15 is a booster fan, and 16 is a sludge pre-drying workshop.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the sludge pre-drying direct-to-furnace co-combustion system suitable for the circulating fluidized bed boiler of the present invention comprises a wet sludge bin 1, a pre-drying device 3, a dry sludge storage bin 5, a coal conveying belt 7, a sludge distribution belt 8, a furnace front sludge bin 9, a rotary blockage removal device 10, a furnace inlet screw 11, a blanking pipe 12 and a circulating fluidized bed boiler 13; the outlet of the wet sludge bin 1 is communicated with the inlet of a circulating fluidized bed boiler 13 through a predrying device 3, a dry sludge storage bin 5, a coal conveying belt 7, a sludge distribution belt 8, a furnace front sludge bin 9, a rotary blockage removal device 10, a furnace inlet screw 11 and a blanking pipe 12 in sequence.
The utility model discloses still include mud predrying workshop factory building 16, wherein, wet sludge storehouse 1, predrying equipment 3 and dry sludge storage 5 all are located mud predrying workshop factory building 16.
Specifically, an air outlet of a sludge pre-drying workshop 16 is communicated with the circulating fluidized bed boiler 13 through a negative pressure fan 14 and a booster fan 15; the wet sludge bin 1 is communicated with a pre-drying device 3 through a wet sludge conveying device 2; the pre-drying device 3 is communicated with a dry sludge storage bin 5 through a dry sludge discharge conveying device 4; the dry sludge storage bin 5 is connected with a coal conveying belt 7 through a dry sludge conveying device 6.
The wet sludge pre-drying process comprises the following steps: wet sludge with the water content of 70-85 percent temporarily stored in the wet sludge bin 1 is conveyed to a pre-drying device 3 through a wet sludge conveying device 2, and then the sludge is dried by the pre-drying device 3 until the water content is 50-65 percent and then is conveyed to a dry sludge storage bin 5 through a dry sludge discharging and conveying device 4.
The dried sludge warehousing process comprises the following steps: the dry sludge with the water content of 50-65 percent temporarily stored in the dry sludge storage bin 5 is transported to a coal conveying belt 7 through a dry sludge conveying device 6, is conveyed to the front of the furnace by utilizing the existing coal conveying belt 7, and is conveyed to a front sludge bin 9 through a sludge distribution belt 8.
The sludge incineration system comprises the following processes: sludge in the sludge bin 9 in front of the furnace enters a furnace inlet screw 11 through a rotary blockage removing device 10 and then enters a circulating fluidized bed boiler 13 through a blanking pipe 12 for incineration.
The odor treatment process comprises the following steps: a negative pressure fan 14 is adopted to suck odor in a wet sludge bin 1, a wet sludge conveying device 2, a pre-drying device 3, a dry sludge discharging and conveying device 4, a dry sludge storage bin 5, a dry sludge conveying device 6, a sludge pre-drying workshop 16 and the like, and then the odor is conveyed to a circulating fluidized bed boiler 13 for incineration through an odor conveying pipeline by a booster fan 15.
The sludge with the water content of 50-65% in the dry sludge storage bin 5 is derived from two types, one type is sludge generated by drying wet sludge with the water content of 70-85% through the pre-drying equipment 3, and the other type is sludge with the water content of 50-65% directly delivered by a tank truck of a sewage treatment plant.
The utility model discloses a theory of operation does: wet sludge with the water content of 70-85% sent by a sewage treatment plant is dried to the water content of 50-65% through a pre-drying device 3, then the wet sludge and sludge with the water content of 50-65% directly sent by the sewage treatment plant are sent into a dry sludge storage bin 5, then sludge incineration disposal is carried out through a dry sludge bin adding system and a sludge incineration system, and odor generated in the sludge disposal process is sent to a boiler for incineration through an odor treatment system.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A sludge pre-drying direct-charging mixed combustion system suitable for a circulating fluidized bed boiler is characterized by comprising a wet sludge bin (1), a pre-drying device (3), a dry sludge storage bin (5), a coal conveying belt (7), a sludge distribution belt (8), a front sludge bin (9), a rotary blockage removal device (10), a charging screw (11), a blanking pipe (12) and a circulating fluidized bed boiler (13);
the outlet of the wet sludge bin (1) is communicated with the inlet of a circulating fluidized bed boiler (13) through a predrying device (3), a dry sludge storage bin (5), a coal conveying belt (7), a sludge distribution belt (8), a furnace front sludge bin (9), a rotary blockage removal device (10), a furnace feeding screw (11) and a blanking pipe (12) in sequence.
2. The sludge pre-drying direct-feeding co-combustion system suitable for the circulating fluidized bed boiler as claimed in claim 1, further comprising a sludge pre-drying workshop (16), wherein the wet sludge bin (1), the pre-drying equipment (3) and the dry sludge storage bin (5) are all located in the sludge pre-drying workshop (16).
3. The sludge pre-drying direct-to-furnace co-firing system suitable for the circulating fluidized bed boiler according to claim 2, wherein an air outlet of the sludge pre-drying workshop building (16) is communicated with the circulating fluidized bed boiler (13) through a negative pressure fan (14) and a booster fan (15).
4. The sludge pre-drying direct-to-furnace co-firing system suitable for the circulating fluidized bed boiler according to claim 1, wherein the wet sludge bin (1) is communicated with the pre-drying device (3) through a wet sludge conveying device (2).
5. The sludge pre-drying direct-to-furnace co-firing system suitable for the circulating fluidized bed boiler according to claim 1, wherein the pre-drying device (3) is communicated with the dry sludge storage bin (5) through a dry sludge discharge conveying device (4).
6. The sludge pre-drying direct-to-furnace co-firing system suitable for the circulating fluidized bed boiler according to claim 1, wherein the dry sludge storage bin (5) is connected with the coal conveying belt (7) through a dry sludge conveying device (6).
7. The sludge pre-drying direct-to-furnace co-firing system suitable for the circulating fluidized bed boiler according to claim 1, wherein the pre-drying device (3) dries the wet sludge from 70% to 85% to 50% to 65%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020356649.8U CN211781132U (en) | 2020-03-19 | 2020-03-19 | Sludge pre-drying direct-charging mixed combustion system suitable for circulating fluidized bed boiler |
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| CN202020356649.8U CN211781132U (en) | 2020-03-19 | 2020-03-19 | Sludge pre-drying direct-charging mixed combustion system suitable for circulating fluidized bed boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593853A (en) * | 2022-03-14 | 2022-06-07 | 苏州西热节能环保技术有限公司 | Online monitoring device for output of sludge drying system, checking method of online monitoring device and storage medium |
| CN114893780A (en) * | 2022-06-14 | 2022-08-12 | 上海市政工程设计研究总院（集团）有限公司 | Combined feeding system for sludge incineration and sludge incineration method |
-
2020
- 2020-03-19 CN CN202020356649.8U patent/CN211781132U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593853A (en) * | 2022-03-14 | 2022-06-07 | 苏州西热节能环保技术有限公司 | Online monitoring device for output of sludge drying system, checking method of online monitoring device and storage medium |
| CN114593853B (en) * | 2022-03-14 | 2024-04-09 | 苏州西热节能环保技术有限公司 | Online monitoring device for sludge drying system output, checking method thereof and storage medium |
| CN114893780A (en) * | 2022-06-14 | 2022-08-12 | 上海市政工程设计研究总院（集团）有限公司 | Combined feeding system for sludge incineration and sludge incineration method |
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