CN217479294U - Waste incineration and sludge drying system based on waste heat recovery - Google Patents
Waste incineration and sludge drying system based on waste heat recovery Download PDFInfo
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- CN217479294U CN217479294U CN202121252599.XU CN202121252599U CN217479294U CN 217479294 U CN217479294 U CN 217479294U CN 202121252599 U CN202121252599 U CN 202121252599U CN 217479294 U CN217479294 U CN 217479294U
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- 239000010802 sludge Substances 0.000 title claims abstract description 70
- 238000004056 waste incineration Methods 0.000 title claims abstract description 61
- 238000001035 drying Methods 0.000 title claims abstract description 33
- 239000002918 waste heat Substances 0.000 title claims abstract description 30
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003546 flue gas Substances 0.000 claims abstract description 18
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 15
- 238000010248 power generation Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 230000001172 regenerating effect Effects 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 9
- 239000010865 sewage Substances 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
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- 239000010791 domestic waste Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
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Abstract
The invention relates to a waste incineration and sludge drying system based on waste heat recovery. The system mainly comprises: a waste incineration and waste heat recovery system, a steam turbine power generation system and a sludge drying system. Steam generated after waste incineration heat release enters a steam turbine to do work to drive a generator to generate power, flue gas generated by waste incineration enters a sludge dryer to dry sludge, waste heat of discharged smoke generated by waste incineration is effectively recycled, and the dried sludge and household garbage are mixed and sent into a boiler to be combusted, and incineration power generation is performed. The utility model discloses get up the coupling of msw incineration power generation system and sludge drying system to retrieve the waste heat of flue gas, realized the ladder utilization of energy, mix the mud after the drying with rubbish simultaneously and burn, utilized the heat that mud contained, realized the high-efficient utilization of mud. According to the invention, through the integration of the waste incineration system and the sludge drying system, the utilization efficiency of heat generated by waste incineration is improved, and the total power generation power of the system is increased.
Description
Technical Field
The utility model relates to a power station energy saving and emission reduction field and sludge drying technical field, in particular to waste incineration and sludge drying system based on waste heat recovery.
Background
In recent years, the production and transportation of municipal solid waste are increasing with the increasing urbanization process of China and the continuous improvement of the living standard of people. At present, the first problem to be urgently solved in future urban development in China is to reduce, utilize and recycle urban garbage. The most common means of waste disposal today is incineration. The garbage is incinerated to achieve the purposes of reducing and harmlessly incinerating the garbage, and meanwhile, the heat generated by the incineration of the garbage can be utilized to generate electricity and supply heat. With the concern of people on ecological environment problems, people begin to adhere to a green development concept, the incineration treatment of garbage can promote ecological civilization construction and the use of coal resources can be reduced by utilizing the incineration power generation of the garbage. Better economic benefits and social benefits can be obtained by utilizing the garbage to generate electricity, and energy conservation and emission reduction are effectively realized. However, the thermal efficiency of the waste incineration power plant is only 22% to 25%, because the current mainstream waste incineration power plant basically adopts a medium-temperature and medium-pressure boiler, the main steam parameter of the waste incineration power plant is 4MPa and 400 ℃, the waste incineration power plant is only half of that of a conventional heat-engine plant (47%), many scholars at home and abroad research on how to improve the waste incineration power generation efficiency, and the main reasons of the low efficiency of the waste incineration system are that the steam parameter is low, the unit capacity is small, and the regenerative cycle is incomplete. The power station has a large amount of waste heat, and the better waste heat recovery and utilization of the waste incineration power station is significant and very necessary no matter in consideration of economic development and safe and reliable operation of the power plant or in view of energy conservation, consumption reduction and environmental protection; meanwhile, at present, a system for utilizing waste heat of a waste incineration power station does not exist.
In addition, the amount of sewage generated in China is continuously increased in recent years, and the environment is greatly damaged due to improper sewage treatment. The sludge is a product after sewage treatment, is an extremely complex heterogeneous body consisting of organic fragments, bacterial thalli, inorganic particles and colloids, and has the main characteristic of high water content (up to more than 99%). Sludge contains a large amount of nitrogen, sulfur, chlorine and heavy metal pollutants, serious secondary pollution can be caused by improper treatment, and the problem of harmless treatment of sludge is increasingly severe. At present, the method commonly adopted is to dry sludge to reduce the water content of the dried sludge and then burn the dried sludge, but the sludge burning generates a large amount of heat, and the waste is caused if the sludge is not recycled.
Therefore, the waste incineration power plant adopts a waste heat recovery mode to utilize the smoke generated by the waste incineration boiler to dry the sludge, the dried sludge is mixed with the garbage and is conveyed to the waste incineration boiler to be incinerated for power generation, the heat of the sludge can be effectively utilized, and the utilization rate of resources is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at that the efficiency to present msw incineration electricity generation is lower, and resource utilization is not high and sludge incineration produces a large amount of thermal energy waste problem, provides a msw incineration and sludge drying system based on waste heat recovery. The method is characterized in that flue gas generated by waste incineration is used as a heat source to dry sludge, and the dried sludge and household garbage are mixed together and enter a boiler to be incinerated for power generation. The waste heat of the discharged smoke generated by the waste incineration and the heat generated by the sludge incineration are fully utilized, the generating heat efficiency of the unit is effectively improved, and the utilization rate of resources is improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a waste incineration and sludge drying system based on waste heat recovery. The system mainly comprises a garbage boiler, a steam turbine, a generator, a condenser, a sludge dryer, a condensate pump, a regenerative heater, a deaerator and a water feed pump.
Steam at the outlet of the waste incineration boiler enters a steam turbine to do work to drive a coaxial generator to generate electricity, and primary extracted steam of the steam turbine enters a deaerator through an inlet of the deaerator after being extracted from the steam turbine and is mixed with condensed water from a regenerative heater; the secondary steam extraction of the steam turbine enters a regenerative heater to heat condensed water from a condensed water pump, and then enters a condenser to be mixed with the condensed water in the condenser; the steam turbine export exhaust steam gets into the condenser and gets into the condensate pump pressurization after with the water that comes from the backheat heater mixes, the condensate moisture after the pressurization is two strands, one gets into the condenser condensation and comes from the harmful steam of sludge dryer, then mix with the backheat export feedwater, wherein send the processing by the sewage that forms after the condensation, other harmful gas of mixing in harmful steam continue to send the msw incineration boiler to burn, another strand gets into backheat heater and deaerator in proper order, absorb the heat in the backheat heater after deaerator and steam turbine one-level extraction steam mix the heat transfer, the mixed water of deaerator export gets into the msw incineration boiler heat absorption evaporation behind the feedwater pump and forms steam and gets into the steam turbine and do work, accomplish the circulation.
The superheated steam generated from the outlet of the waste incineration boiler enters a steam turbine to expand and do work, and the coaxial generator is pushed to generate power.
High temperature flue gas that msw incineration boiler produced lets in sludge dryer and carries out the drying to wet mud, and mud and domestic waste after the drying mix, then carry msw incineration boiler to burn the electricity generation, can effectively utilize mud and domestic waste in coordination.
The outlet flue gas temperature after passing through the purifier was about 150 ℃.
The exhaust steam temperature of the flue gas at the outlet of the waste incineration boiler after the sludge is dried by the sludge dryer is about 80 ℃.
After the sludge is dried by the flue gas from the waste incineration boiler in the sludge dryer by utilizing waste heat, harmful steam enters a condenser to be condensed, dry sludge is directly mixed with municipal domestic garbage and enters the waste incineration boiler to be incinerated to release heat, and boiler feed water is heated; the waste incineration flue gas discharged in the waste incineration boiler enters the sludge dryer to discharge heat and then goes to the flue gas treatment system.
The beneficial effects of the utility model are that:
the utility model provides a waste incineration and sludge drying system based on waste heat recovery is a novel waste incineration power generation system. The system consists of a waste incineration system, a sludge drying system and a steam Rankine cycle. This system dries mud with steam turbine exhaust steam, makes its water content reduce, and the volume reduces, and the further processing of being convenient for has realized effectively handling to mud, has realized the utilization to the msw incineration waste heat simultaneously, mixes the mud after will drying and domestic waste then burns, has both carried out reasonable processing to mud, also recycle the heat that mud contained, has improved the utilization ratio of resource.
Drawings
Fig. 1 is a schematic structural diagram of a waste incineration and sludge drying system based on waste heat recovery.
In the figure: 1-a waste incineration boiler; 2-a steam turbine; 3, a generator; 4-a condenser; 5-a sludge dryer; 6-a condensate pump; 7-a regenerative heater; 8-a deaerator; 9-a water supply pump; 10-a purifier; 11-a condenser; 12-chimney.
Detailed Description
The utility model provides a waste incineration and sludge drying system based on waste heat recovery, combine the figure and the detailed implementation mode to make further explanation to this system's theory of operation below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope or application of the present disclosure.
Fig. 1 shows a waste incineration and sludge drying system based on waste heat recovery.
As shown in fig. 1, the utility model provides a pair of waste incineration and sludge drying system based on waste heat recovery mainly includes msw incineration boiler 1, steam turbine 2, generator 3, condenser 4, sludge drying ware 5, condensate pump 6, regenerative heater 7, oxygen-eliminating device 8, feed pump 9, clarifier 10, condenser 11, chimney 12. Steam at the outlet of the waste incineration boiler 1 enters a steam turbine 2 to do work to drive a coaxial generator 3 to generate electricity; in the steam turbine 2, the primary extracted steam of the steam turbine 2 is extracted from the steam turbine 2 and then enters a deaerator 8 through an inlet of the deaerator 8 to be mixed with condensed water from a regenerative heater 7; the secondary steam extraction of the steam turbine 2 enters a regenerative heater 7 to heat condensed water from a condensed water pump 6, and then enters a condenser 4 to be mixed with the condensed water in the condenser 4; the exhaust steam at the outlet of the steam turbine 2 enters the condenser 4 and is mixed with the water from the regenerative heater 7 to enter the condensate pump 6 for pressurization, the condensed water after pressurization is divided into two streams, one stream enters the condenser 11 for condensing the harmful steam from the sludge dryer 5 and is then mixed with the water fed from the outlet of the regenerative heater, the sewage formed after condensation is sent to be treated, other harmful gases mixed in the harmful steam are continuously sent to the waste incineration boiler 1 for incineration, the other stream sequentially enters the regenerative heater 7 and the deaerator 8, the mixed water at the deaerator 8 and the steam turbine 2 for primary steam extraction and mixed heat exchange after heat absorption in the regenerative heater 7, the mixed water at the outlet of the deaerator 8 enters the waste incineration boiler 1 through the water fed pump 9 for heat absorption and evaporation to form steam, and then enters the steam turbine 2 for work, and therefore the whole cycle is completed.
Superheated steam at the outlet of the waste incineration boiler 1 enters the steam turbine 2 to expand and do work, and the coaxial generator is pushed to generate power.
The high temperature flue gas that msw incineration boiler 1 produced gets into sludge dryer 5 make full use of waste heat and dries wet sludge, and the sludge after the drying mixes with domestic waste, then carries msw incineration boiler 1 to burn the electricity generation, can effectively utilize sludge and domestic waste in coordination.
The outlet flue gas temperature generated after passing into the purifier 10 is about 150 ℃.
The temperature of the exhaust steam of the flue gas at the outlet of the waste incineration boiler 1 after the sludge is dried in the sludge dryer 5 is about 80 ℃.
Mud is utilized the waste heat to carry out the drying to it by the flue gas that comes from msw incineration boiler 1 in sludge dryer 5, and the harmful steam that comes out by the drying gets into condenser 11 condensation and becomes sewage discharge, and the water content is reduced to 10 ~ 40% dry mud and domestic waste mix, gets into msw incineration boiler 1 together afterwards and burns exothermic, heats boiler feed water, and the msw incineration flue gas after exothermic gets into sludge dryer 5 and releases heat and goes to flue gas treatment system in msw incineration boiler 1.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A waste incineration and sludge drying system based on waste heat recovery mainly comprises: the system comprises a waste incineration boiler (1), a steam turbine (2), a generator (3), a condenser (4), a sludge dryer (5), a condensate pump (6), a regenerative heater (7), a deaerator (8), a feed pump (9), a purifier (10), a condenser (11) and a chimney (12); the system is characterized in that the whole system comprises a waste incineration and waste heat recovery system, a steam turbine and heat recovery system and a sludge drying system; an outlet of a waste incineration boiler (1) is connected with an inlet of a steam turbine (2), the steam turbine (2) is connected with a generator (3) which is coaxial with the steam turbine in series, primary steam extraction of the steam turbine (2) leads to an inlet of a deaerator (8), secondary steam extraction of the steam turbine (2) leads to a regenerative heater (7), the steam turbine (2), the steam condenser (4), a condensate pump (6), the regenerative heater (7), the deaerator (8) and a water feed pump (9) are sequentially connected, in addition, another strand of harmful steam which is led into a condenser (11) from an outlet of the condensate pump (6) to be condensed and comes from a sludge dryer (5) is mixed with feed water at an outlet of the regenerative heater, wherein sewage formed after condensation is sent to be treated, and other harmful gases mixed in the harmful steam are continuously sent to the waste incineration boiler (1) to be incinerated; the exhaust steam is cooled into condensed water in a condenser (4), flows through a regenerative heater (7) for regenerative heating, enters a deaerator (8) for deaerating, and is sent to a waste incineration boiler (1), and a steam turbine (2) drives a generator (3) to generate electricity; the outlet of the waste incineration boiler (1) is connected with the inlets of the purifier (10), the sludge dryer (5) and the chimney (12) in sequence.
2. The waste incineration and sludge drying system based on waste heat recovery as set forth in claim 1, wherein superheated steam at the outlet of the waste incineration boiler (1) enters the steam turbine (2) to expand and do work, and drives the coaxial generator (3) to generate electricity.
3. The waste heat recovery-based waste incineration and sludge drying system as claimed in claim 1, wherein flue gas generated by the waste incineration boiler (1) enters the sludge dryer (5) to dry wet sludge, and the dried sludge is mixed with household garbage and then conveyed to the waste incineration boiler (1) to be incinerated for power generation.
4. Waste incineration and sludge drying system based on waste heat recovery according to claim 1, characterised in that the temperature of the flue gas at the outlet of the purifier (10) is about 150 ℃.
5. Waste incineration and sludge drying system based on waste heat recovery according to claim 1, characterised in that the exhaust steam temperature of the flue gas at the outlet of the waste incineration boiler (1) after the sludge drying of the sludge dryer (5) is about 80 ℃.
6. The waste incineration and sludge drying system based on waste heat recovery as set forth in claim 1, characterized in that the harmful steam generated by drying the wet sludge is condensed by the feed water from the condensate pump (6), the condensed sewage is sent to be treated, and other harmful gases mixed in the harmful steam are sent to the waste incineration boiler (1) to be incinerated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121252599.XU CN217479294U (en) | 2021-06-07 | 2021-06-07 | Waste incineration and sludge drying system based on waste heat recovery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121252599.XU CN217479294U (en) | 2021-06-07 | 2021-06-07 | Waste incineration and sludge drying system based on waste heat recovery |
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| Publication Number | Publication Date |
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| CN217479294U true CN217479294U (en) | 2022-09-23 |
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| CN202121252599.XU Expired - Fee Related CN217479294U (en) | 2021-06-07 | 2021-06-07 | Waste incineration and sludge drying system based on waste heat recovery |
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2021
- 2021-06-07 CN CN202121252599.XU patent/CN217479294U/en not_active Expired - Fee Related
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Granted publication date: 20220923 |