CN210320080U - Incineration system for coupling wet sludge drying treatment and pulverized coal fired boiler - Google Patents
Incineration system for coupling wet sludge drying treatment and pulverized coal fired boiler Download PDFInfo
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- CN210320080U CN210320080U CN201920825722.9U CN201920825722U CN210320080U CN 210320080 U CN210320080 U CN 210320080U CN 201920825722 U CN201920825722 U CN 201920825722U CN 210320080 U CN210320080 U CN 210320080U
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Abstract
An incineration system for wet sludge drying treatment and pulverized coal boiler coupling belongs to the technical field of sludge treatment. The utility model discloses directly mix the problem that the processing method can cause air pollution to current mud. A wet sludge storage bin of the sludge drying device is communicated with a sludge drier through a sludge pump; the sludge dried by the sludge drier enters a dry sludge storage bin, is conveyed to a coal hopper by a dry sludge feeder and a scraper conveyor, and then enters a coal-fired boiler through a coal feeder and a coal pulverizer in sequence; the heat energy generated by the coal-fired boiler is transmitted to the steam turbine through a pipeline, and the steam generated by the steam turbine is supplied to the sludge drier for drying the wet sludge after passing through the temperature and pressure reduction device. The utility model can be used for the combustion treatment of sludge; the pollution generated in the sludge treatment process is harmlessly treated by using the perfect flue gas purification treatment equipment of the pulverized coal fired boiler unit of the power plant, and the pollution to the surrounding environment is reduced on the basis of not increasing the investment cost of sludge treatment.
Description
Technical Field
The utility model relates to a wet sludge drying handles system of burning with pulverized coal boiler coupling belongs to sludge treatment technical field.
Background
A large amount of sludge generated in the sewage treatment process can cause secondary pollution of underground water and soil. The sludge treatment comprises two modes of traditional sludge treatment and modern sludge treatment: the traditional sludge disposal mode is mainly landfill, and the landfill can cause great pollution to the ecological environment and occupies a large area due to the fact that the sludge contains harmful substances such as organic humus, malodorous substances, parasitic ova, bacterial thalli and heavy metals; the modern sludge disposal mode adopts a drying and incinerating mode, corresponding sludge drying and incinerating equipment needs to be newly built, and the sludge is dried and then is sent to the incinerating equipment for disposal; the heat generated by incineration can be used as a heat source of sludge drying equipment, so that the energy of the whole system can be recycled, but the investment cost and the maintenance cost are higher.
One of the modern sludge treatment modes comprises sludge direct mixing, namely mixing wet sludge at a coal yard of a thermal power plant, and enabling the wet sludge and raw coal to enter a coal-fired boiler together through a belt coal feeder. In the process of conveying wet sludge, harmful substances such as malodorous substances generated by volatilization easily cause air pollution in a coal yard area and a lower air inlet area; and secondly, wet sludge is conveyed to the fluidized bed boiler through a screw pump or a plunger pump to be mixed with coal for burning, but the mode is only suitable for the fluidized bed boiler and is not beneficial to popularization and application.
Therefore, in view of the above disadvantages, there is a need for a new way to achieve incineration of wet sludge, so as to achieve harmless treatment of sludge and efficient utilization of low-level heat sources.
SUMMERY OF THE UTILITY MODEL
Directly mix the problem that the processing mode can cause air pollution to current mud, the utility model provides a wet sludge drying handles the system of burning with pulverized coal boiler coupling.
The utility model relates to an incineration system for coupling wet sludge drying treatment and a pulverized coal boiler, which comprises a wet sludge storage bin, a sludge pump, a sludge drying machine, a dry sludge storage bin, a dry sludge feeder, a scraper conveyor, a coal hopper, a coal feeder, a coal pulverizer, a coal-fired boiler, a steam turbine and a temperature and pressure reduction device,
the wet sludge storage bin is communicated with a sludge drier through a sludge pump; the sludge dried by the sludge drier enters a dry sludge storage bin, is conveyed to a coal hopper by a dry sludge feeder and a scraper conveyor, and then enters a coal-fired boiler through a coal feeder and a coal pulverizer in sequence; the heat energy generated by the coal-fired boiler is transmitted to the steam turbine through a pipeline, and the steam generated by the steam turbine is supplied to the sludge drier for drying the wet sludge after passing through the temperature and pressure reduction device.
According to the utility model discloses a wet sludge drying handles system of burning with pulverized coal boiler coupling still includes the direct pipeline of mud, and the storehouse is stored to wet mud passes through the direct pipeline of mud and communicates with the coal pulverizer.
According to the utility model discloses a wet sludge drying handles system of burning with pulverized coal boiler coupling, set up No. two sludge pumps on the direct pipeline of mud.
According to the utility model discloses a wet sludge drying handles the system of burning with pulverized coal boiler coupling still includes the waste gas recovery pipeline, waste gas recovery pipeline one end intercommunication sludge drying machine's gas outlet, and coal fired boiler's supply-air outlet is connected to the other end.
According to the utility model discloses a wet sludge drying handles the system of burning with pulverized coal boiler coupling, set up the waste gas draught fan on the waste gas recovery pipeline of burning the system.
The incineration system for coupling the wet sludge drying treatment and the pulverized coal boiler also comprises a second condenser and a sewage treatment tank,
the sewage draining outlet of the sludge drier is communicated with a second condenser, and the outlet of the second condenser is simultaneously communicated with the inlet of the sewage treatment tank and the waste gas recovery pipeline.
According to the utility model discloses a system of burning of wet sludge drying processing and pulverized coal boiler coupling still includes a condenser, and the energy recovery mouth of sludge drying machine communicates the entry of a condenser, and the energy recovery entry of energy recuperation pipeline intercommunication coal fired boiler is passed through in the export of a condenser.
According to the utility model discloses a system of burning of wet sludge drying processing and pulverized coal boiler coupling, the steam that the steam turbine produced is connected through steam outlet and steam transmission pipeline's one end, and steam transmission pipeline's the other end intercommunication pressure relief device that reduces the temperature, set up No. two valves on the steam transmission pipeline.
According to the utility model discloses a wet sludge drying handles system of burning with pulverized coal boiler coupling, the steam outlet of steam turbine communicates through circulation pipeline and energy recuperation pipeline, set up the valve No. one on the circulation pipeline.
According to the utility model discloses a wet sludge drying handles system of burning with pulverized coal boiler coupling still includes the forced draught blower, forced draught blower and coal fired boiler's supply-air outlet intercommunication.
The utility model has the advantages that: the utility model discloses in introducing pulverized coal boiler's fuel system with wet sludge's processing procedure, can mix sludge and pulverized coal boiler's raw coal fuel, regard as the burning heat source jointly. The method can fully burn the sludge by utilizing the characteristics of high-temperature environment, high-efficiency combustion efficiency and long fuel retention time of the pulverized coal fired boiler; meanwhile, pollution generated in the sludge treatment process is subjected to harmless treatment by using the perfect flue gas purification treatment equipment of the pulverized coal fired boiler unit of the power plant, and the pollution to the surrounding environment is reduced on the basis of not increasing the investment cost of sludge treatment.
The utility model discloses a high-efficient utilization of the mud as the low energy level heat source can be used to power generation system's electricity generation heat supply.
Drawings
Fig. 1 is a schematic diagram of an exemplary structure of an incineration system for wet sludge drying treatment and pulverized coal boiler coupling according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The first embodiment of the invention is shown in fig. 1, the utility model provides an incineration system for wet sludge drying treatment and pulverized coal boiler coupling, which comprises a wet sludge storage bin 1, a sludge pump 2, a sludge drying machine 3, a dry sludge storage bin 5, a dry sludge feeder 6, a scraper conveyor 7, a coal hopper 9, a coal feeder 10, a coal pulverizer 11, a coal-fired boiler 12, a steam turbine 13 and a temperature and pressure reduction device 17,
the wet sludge storage bin 1 is communicated with a sludge drier 3 through a first sludge pump 2; the sludge dried by the sludge drier 3 enters a dry sludge storage bin 5, is conveyed to a coal hopper 9 by a dry sludge feeder 6 and a scraper conveyor 7, and then sequentially enters a coal-fired boiler 12 by a coal feeder 10 and a coal pulverizer 11; the heat energy generated by the coal-fired boiler 12 is transmitted to the steam turbine 13 through a pipeline, and the steam generated by the steam turbine 13 is supplied to the sludge drier 3 through the temperature and pressure reducing device 17 to dry the wet sludge.
The embodiment provides a coupling mode of sludge and a coal-fired generator set, wet sludge in a wet sludge storage bin 1 is conveyed to a sludge drier 3 through a sludge pump 2, then the wet sludge is dried through saturated steam provided by a steam turbine 13, and the dried sludge can be mixed with raw coal fuel in a coal hopper 9 and jointly used as fuel of a coal-fired boiler 12. The sludge dried by the sludge drier 3 is output through a sludge outlet, the water content is about 35 percent, the temperature is 80 ℃, and the sludge can be conveyed to a coal hopper 9 through a fully-sealed scraper conveyor 7.
The sludge drier 3 can adopt a steam indirect heat exchange mode, and can evaporate water more quickly by stirring sludge, thereby being suitable for sludge semi-drying and sludge full-drying.
By way of example, the body of the sludge dryer 3 may comprise a cylindrical housing, a hollow shaft and a plurality of hollow discs welded to the hollow shaft, through which the steam heat medium flows to indirectly transfer heat to the wet sludge. The sludge passes between the hollow disc and the shell, and water is evaporated after receiving heat. The generated water vapor can be collected in a dome above the disc and brought out of the sludge drier 3 in a ventilating manner.
Further, the incineration system also comprises a sludge direct pipeline 1-1, and the wet sludge storage bin 1 is communicated with a coal mill 11 through the sludge direct pipeline 1-1.
On the basis of the coupling mode of the sludge and the coal-fired generator set, the embodiment also provides another path for directly mixing wet sludge and coal powder through the sludge through pipeline 1-1. Therefore, the invention can comprehensively realize the process route of 'direct wet sludge doping, drying and pulverized coal boiler incineration'. The sludge straight pipeline 1-1 can be used for directly conveying wet sludge with the water content of about 80% to an inlet of a coal mill 11, the wet sludge enters a coal mill coal dropping pipe together with raw coal and drops onto a grinding ring, and the sludge and raw coal mixed fuel are milled by a grinding roller and then are fed into a coal-fired boiler 12 through primary air for combustion.
Still further, a second sludge pump 1-2 can be arranged on the sludge straight pipeline 1-1. The second sludge pump 1-2 is used for providing power for the direct transmission of wet sludge.
Furthermore, the incineration system also comprises a waste gas recovery pipeline 3-1, one end of the waste gas recovery pipeline 3-1 is communicated with the gas outlet of the sludge drier 3, and the other end is connected with the air supply outlet of the coal-fired boiler 12.
If the waste gas generated in the process of drying wet sludge by the sludge dryer 3 is directly discharged to the external environment, the environment pollution can be caused, and in the embodiment, the waste gas is guided into the coal-fired boiler 12 by the waste gas recovery pipeline 3-1 for incineration disposal, so that the further utilization of energy is ensured, and the environment-friendly effect is achieved.
Still further, a waste gas induced draft fan 14 is arranged on a waste gas recovery pipeline 3-1 of the incineration system. And the waste gas induced draft fan 14 is used for promoting the circulation of waste gas generated by the sludge drier 3 to the coal-fired boiler 12. The waste gas induced draft fan 14 adopts a negative pressure design, and the maximum negative pressure air extraction quantity can be designed according to 20% of total forced air exhaust.
Still further, the incineration system also comprises a second condenser 4-2 and a sewage treatment tank 8,
the sewage discharge outlet of the sludge drier 3 is communicated with a second condenser 4-2, and the outlet of the second condenser 4-2 is simultaneously communicated with the inlet of the sewage treatment tank 8 and the waste gas recovery pipeline 3-1.
In the embodiment, the redundant steam in the sludge drier 3 is further condensed and then is subjected to environment-friendly treatment, on one hand, the sewage generated after condensation is treated, and on the other hand, the waste existing in a gaseous state is further introduced into the waste gas recovery pipeline 3-1.
Still further, the incineration system also comprises a first condenser 4-1, an energy recovery port of the sludge drier 3 is communicated with an inlet of the first condenser 4-1, and an outlet of the first condenser 4-1 is communicated with an energy recovery inlet of the coal-fired boiler 12 through an energy recovery pipeline 3-2.
The energy recovery pipeline 3-2 in this embodiment can condense the excess steam in the sludge drying machine 3 and then recover the condensed steam to the coal-fired boiler 12 for energy circulation.
Still further, steam generated by the steam turbine 13 is connected with one end of a steam transmission pipeline 13-1 through a steam outlet, the other end of the steam transmission pipeline 13-1 is communicated with a temperature and pressure reducing device 17, and a second valve 16-2 is arranged on the steam transmission pipeline 13-1. A valve is arranged on the steam transmission pipeline 13-1, and the transmission quantity of the steam can be controlled.
As an example, steam of 1.2MPa and 300 ℃ can be obtained by a steam turbine 13 of a thermal power plant, and then the steam is controlled to a temperature and pressure reducing device 17 through a second valve 16-2 to obtain saturated steam of 0.5MPa and 152-165 ℃, and the saturated steam is supplied to a sludge drier 3 to dry wet sludge.
Still further, a steam outlet of the steam turbine 13 is communicated with the energy recovery pipeline 3-2 through a circulating pipeline 13-2, and a first valve 16-1 is arranged on the circulating pipeline 13-2. The first valve 16-1 can be used for preventing water vapor in the energy recovery pipeline 3-2 from flowing back into the steam turbine 13.
Still further, the incineration system further comprises a blower 15, and the blower 15 is communicated with an air supply outlet of the coal-fired boiler 12. The blower 15 blows air into the coal-fired boiler 12, and the combustion efficiency of fuel in the coal-fired boiler 12 can be improved.
Incineration system in, the tail gas that finally produces noncondensable gas and mud storage, transport, mummification process produced to and the foul smell that entire system inorganization discharged all can take the processing mode that fixed point negative pressure and whole negative pressure combined together. The high-pressure flushing water used for flushing the wet sludge pipeline during maintenance of the incineration system can be arranged to flow back to the wet sludge storage bin 1.
Experiments prove that the dehydrated sludge dry basis heat value is 5844kJ/kg to 19303kJ/kg, the average value is 11850kJ/kg, and if the sludge dry basis heat value is calculated according to the 300MW subcritical unit maximum blending combustion amount of 200 tons/day and the wet sludge with the water content of 80%, the sludge heat value converted into standard coal can replace 10 tons/day standard coal, and 3000 tons of standard coal can be saved in a year; the current municipal sludge treatment cost is 200 yuan/ton to 450 yuan/ton, and the income obtained by annual sludge blending combustion of the utility model can reach 1200 to 2700 ten thousand yuan according to the calculation of the maximum blending combustion amount; the sludge after steam drying can be completely mixed into a boiler for complete combustion, the standard-reaching discharge is realized, and the resources of the existing public facilities, steam, fields, efficient boilers and the like in a plant area can be fully utilized.
To sum up, wet sludge drying handles the system of burning with pulverized coal boiler coupling, can be used to carry out efficient innocent treatment to wet sludge to can practice thrift the soil, it has improved the utilization ratio of the energy simultaneously.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. An incineration system for wet sludge drying treatment and pulverized coal boiler coupling, which is characterized by comprising a wet sludge storage bin (1), a sludge pump (2), a sludge drying machine (3), a dry sludge storage bin (5), a dry sludge feeder (6), a scraper conveyor (7), a coal hopper (9), a coal feeder (10), a coal mill (11), a coal-fired boiler (12), a steam turbine (13) and a temperature and pressure reduction device (17),
the wet sludge storage bin (1) is communicated with a sludge drier (3) through a first sludge pump (2); the sludge dried by the sludge drier (3) enters a dry sludge storage bin (5), is conveyed to a coal hopper (9) by a dry sludge feeder (6) and a scraper conveyor (7), and then sequentially enters a coal-fired boiler (12) by a coal feeder (10) and a coal pulverizer (11); the heat energy generated by the coal-fired boiler (12) is transmitted to the steam turbine (13) through a pipeline, and the steam generated by the steam turbine (13) is supplied to the sludge drier (3) through the temperature and pressure reducing device (17) to dry the wet sludge.
2. The incineration system of a wet sludge drying treatment coupled with a pulverized coal fired boiler according to claim 1, characterized in that the incineration system further comprises a sludge through pipe (1-1), and the wet sludge storage bin (1) is communicated with a coal pulverizer (11) through the sludge through pipe (1-1).
3. The incineration system of the wet sludge drying treatment coupled with the pulverized coal fired boiler as recited in claim 2, wherein a second sludge pump (1-2) is arranged on the sludge through pipe (1-1).
4. The incineration system of the wet sludge drying treatment and pulverized coal fired boiler coupling according to claim 3, characterized in that the incineration system further comprises a waste gas recovery pipeline (3-1), one end of the waste gas recovery pipeline (3-1) is communicated with the gas outlet of the sludge drying machine (3), and the other end is connected with the air supply outlet of the coal fired boiler (12).
5. The incineration system of the wet sludge drying treatment and pulverized coal boiler coupling according to claim 4, characterized in that a waste gas induced draft fan (14) is arranged on a waste gas recovery pipeline (3-1) of the incineration system.
6. The incineration system of a wet sludge drying treatment coupled with a pulverized coal fired boiler as claimed in claim 5, characterized in that the incineration system further comprises a second condenser (4-2) and a sewage treatment tank (8),
and a sewage discharge outlet of the sludge drier (3) is communicated with a second condenser (4-2), and an outlet of the second condenser (4-2) is simultaneously communicated with an inlet of a sewage treatment tank (8) and a waste gas recovery pipeline (3-1).
7. The incineration system of a wet sludge drying treatment coupled with a pulverized coal fired boiler as claimed in claim 6,
the incineration system further comprises a first condenser (4-1), an energy recovery port of the sludge drier (3) is communicated with an inlet of the first condenser (4-1), and an outlet of the first condenser (4-1) is communicated with an energy recovery inlet of the coal-fired boiler (12) through an energy recovery pipeline (3-2).
8. The incineration system of the wet sludge drying treatment and pulverized coal fired boiler coupling according to claim 7, characterized in that the steam generated by the steam turbine (13) is connected with one end of a steam transmission pipeline (13-1) through a steam outlet, the other end of the steam transmission pipeline (13-1) is communicated with a temperature and pressure reduction device (17), and a second valve (16-2) is arranged on the steam transmission pipeline (13-1).
9. The incineration system of the wet sludge drying treatment and the pulverized coal fired boiler coupled according to claim 8, wherein a steam outlet of the steam turbine (13) is communicated with the energy recovery pipeline (3-2) through a circulation pipeline (13-2), and a first valve (16-1) is arranged on the circulation pipeline (13-2).
10. The incineration system of a wet sludge drying treatment and pulverized coal boiler coupled according to claim 9, characterized in that the incineration system further comprises a blower (15), the blower (15) being in communication with a supply air outlet of the coal fired boiler (12).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393009A (en) * | 2020-04-22 | 2020-07-10 | 华能国际电力股份有限公司 | Sludge co-processing integrated system and method based on coal-fired power plant hot air circulation |
| CN111533425A (en) * | 2020-05-25 | 2020-08-14 | 国惠环保新能源有限公司 | Sludge drying machine exhaust steam treatment system and method |
| CN111998363A (en) * | 2020-10-27 | 2020-11-27 | 长沙兴经达科技有限公司 | Negative-pressure totally-enclosed sludge blending combustion system and working method thereof |
| CN112032755A (en) * | 2020-08-25 | 2020-12-04 | 侯艳权 | Boiler co-combustion system and method for power system generator set |
| CN112174418A (en) * | 2020-11-05 | 2021-01-05 | 西安西热水务环保有限公司 | System and method for cooperatively treating sludge and wastewater in thermal power plant and urban sewage plant |
| CN112628736A (en) * | 2020-11-30 | 2021-04-09 | 国电常州发电有限公司 | Sludge coupling coal-fired generator set recycling treatment system, process and application |
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2019
- 2019-06-03 CN CN201920825722.9U patent/CN210320080U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393009A (en) * | 2020-04-22 | 2020-07-10 | 华能国际电力股份有限公司 | Sludge co-processing integrated system and method based on coal-fired power plant hot air circulation |
| CN111533425A (en) * | 2020-05-25 | 2020-08-14 | 国惠环保新能源有限公司 | Sludge drying machine exhaust steam treatment system and method |
| CN112032755A (en) * | 2020-08-25 | 2020-12-04 | 侯艳权 | Boiler co-combustion system and method for power system generator set |
| CN111998363A (en) * | 2020-10-27 | 2020-11-27 | 长沙兴经达科技有限公司 | Negative-pressure totally-enclosed sludge blending combustion system and working method thereof |
| CN112174418A (en) * | 2020-11-05 | 2021-01-05 | 西安西热水务环保有限公司 | System and method for cooperatively treating sludge and wastewater in thermal power plant and urban sewage plant |
| CN112628736A (en) * | 2020-11-30 | 2021-04-09 | 国电常州发电有限公司 | Sludge coupling coal-fired generator set recycling treatment system, process and application |
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