CN209944349U - Sludge deep-dehydration and drying incineration power generation system - Google Patents
Sludge deep-dehydration and drying incineration power generation system Download PDFInfo
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- CN209944349U CN209944349U CN201920788885.4U CN201920788885U CN209944349U CN 209944349 U CN209944349 U CN 209944349U CN 201920788885 U CN201920788885 U CN 201920788885U CN 209944349 U CN209944349 U CN 209944349U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
Abstract
The utility model relates to a sludge deep dehydration and incineration power generation system, which comprises a membrane filter press and is suitable for deep dehydration of sludge; the steam disc dryer is suitable for drying the sludge; the spiral conveyor is suitable for conveying dried sludge; the incinerator is suitable for drying and incinerating sludge; the waste heat boiler is suitable for absorbing the heat of high-temperature waste gas in the incinerator; the discharge port of the membrane filter press is connected with the feed port of the steam disc dryer, the discharge port of the steam disc dryer is connected with the feed port of the screw conveyer, the outlet of the screw conveyer is connected with the feed port of the incinerator, and the smoke outlet of the incinerator is connected with the smoke inlet of the waste heat boiler. The deep sludge drying incineration power generation system is simple in structure, low in failure rate and high in heat energy utilization rate, can reduce the cost of sludge drying incineration, and meanwhile realizes sludge recycling on the basis of reduction.
Description
Technical Field
The utility model relates to an environmental protection field, concretely relates to mud takes off futilely deeply and burns power generation system.
Background
The sewage treatment plant can produce sludge in the sewage treatment process, the sludge needs to be incinerated after being dehydrated by the dehydration equipment, the sludge reaches the requirement of decrement and harmlessness and is discharged, but the cost for incinerating the sludge after deep dehydration is high, and meanwhile, heat energy generated in the sludge incineration process is basically wasted, the heat loss is large, and the economic benefit is low.
The composition of the municipal sludge is related to the source and treatment process of sewage, the living standard of urban residents and the like, the mean value of the dry basis heat value of the sludge in China is about 11MJ/kg, compared with developed countries such as Europe and America, the dry basis heat value of the sludge in China is reduced by 22.4 percent ~ 37.7.7 percent, simultaneously, the moisture content of the sludge in China is higher, the sludge after dehydration concentration still has higher moisture content, the content of the sludge in China is basically about 80 percent, the higher moisture content and the lower heat value of the sludge enable the sludge in China to be only subjected to blending combustion, and the sludge is subjected to synergistic treatment with a garbage incineration plant and a cement kiln, but the blending combustion amount.
The current sludge incineration treatment process rarely adopts measures such as intermediate reheating and the like, has low power generation efficiency and low economic benefit, and can maintain the operation of a domestic waste incineration plant by a large amount of government subsidies.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, the sludge deep-dewatering and drying incineration power generation system is provided, and the problem of insufficient sludge reduction treatment capacity in the current stage is solved.
The utility model provides a technical scheme that its technical problem adopted is: a sludge deep dehydration, drying, incineration and power generation system comprises a membrane filter press, a sludge drying and incineration and power generation device and a sludge drying and incineration and power generation device, wherein the membrane filter press is suitable for deep dehydration of sludge;
the steam disc dryer is suitable for drying the sludge;
the spiral conveyor is suitable for conveying dried sludge;
the incinerator is suitable for drying and incinerating sludge;
the waste heat boiler is suitable for absorbing the heat of high-temperature waste gas in the incinerator;
the discharge port of the membrane filter press is connected with the feed port of the steam disc dryer, the discharge port of the steam disc dryer is connected with the feed port of the screw conveyer, the outlet of the screw conveyer is connected with the feed port of the incinerator, and the smoke outlet of the incinerator is connected with the smoke inlet of the waste heat boiler.
Further, a steam outlet of the waste heat boiler is connected with a steam power generation system;
the steam power generation system comprises a high-pressure steam turbine, a reheater, a low-pressure steam turbine, a condenser, a low-pressure preheater, a high-pressure preheater and a deaerator;
the waste heat boiler's steam outlet is connected with the high pressure steam turbine air inlet, the re-heater is connected to the high pressure steam turbine gas outlet, the low pressure steam turbine is connected to the re-heater gas outlet, the condenser is connected to the gas outlet of low pressure steam turbine, the low pressure pre-heater is connected to the condenser delivery port, the high pressure pre-heater is connected to the low pressure pre-heater, the oxygen-eliminating device is connected to the high pressure pre-heater, the oxygen-eliminating device is connected with the waste heat boiler water inlet.
Furthermore, a steam outlet of the low-pressure steam turbine is connected with the steam disc dryer through a branch pipeline and is suitable for supplying steam to the steam disc dryer.
The system further comprises a flue gas treatment system, wherein the flue gas treatment system comprises an SNCR system, a semi-dry reactor, an activated carbon ejector, a bag-type dust collector and an SCR system;
the SNCR system is arranged between the smoke outlet of the incinerator and the smoke inlet of the waste heat boiler;
the waste heat boiler flue gas outlet is connected with a semi-dry reactor, the semi-dry reactor is connected with a bag-type dust collector, the bag-type dust collector is connected with an SCR system, and the SCR system is connected with a chimney;
the activated carbon ejector is arranged on a flue gas pipeline between the cloth bag dust collector and the semi-dry reactor.
Further, the flue gas outlet of the waste heat boiler is connected with the flue gas inlet of the air preheater, and the flue gas outlet of the air preheater is connected with the semi-dry reactor;
a heat exchange air inlet of the air preheater is connected with a primary fan, and a heat exchange air outlet of the air preheater is connected with an air inlet of the incinerator;
an ignition device is arranged on the incinerator, and a combustion-supporting air port of the ignition device is connected with a heat exchange air outlet of the air preheater.
The device further comprises a sludge temporary storage warehouse, wherein a discharge hole of the sludge temporary storage warehouse is connected with a feed hole of the membrane filter press;
and an air outlet of the sludge temporary storage warehouse is connected with a secondary fan, and the secondary fan is connected with an air inlet of the incinerator.
Further, still include crushing and screening machine, be suitable for screening dry coal, crushing and screening machine discharge gate is connected with screw conveyer's feed inlet.
The utility model has the advantages that:
the deep sludge drying incineration power generation system is simple in structure, low in failure rate and high in heat energy utilization rate, can reduce the cost of sludge drying incineration, and meanwhile realizes sludge recycling on the basis of reduction.
The system adopts the combination of deep sludge removal and drying, so that the moisture content of the sludge entering the incinerator can be reduced, the consumption of fuel is reduced, the disposal cost of the sludge is reduced, and meanwhile, the drying machine can adjust the moisture content of a sludge outlet according to the design requirement;
the waste heat utilization and power generation are carried out on the flue gas heat generated by sludge incineration, the resource and energy of sludge are realized on the basis of sludge reduction, and the economic benefit of sludge is improved;
the high-low pressure steam turbine set can realize maximum utilization of water vapor heat, and the overall power generation efficiency of sludge power generation is improved;
the deep-stripping, drying and incineration power generation system has high heat utilization rate, the annual operation time is more than 8000h, and the outlet flue gas meets the emission requirement;
the heat efficiency of the drier is 90-95%, which obviously improves the heat efficiency of the whole plant.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a schematic block diagram of a sludge deep-drying incineration power generation system of the present invention;
FIG. 2 is a schematic diagram of a steam power generation system.
Detailed Description
The invention will now be further described with reference to specific embodiments. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.
As shown in figure 1, the sludge deep dehydration and incineration power generation system comprises a membrane filter press and a sludge deep dehydration device, wherein the membrane filter press is suitable for deep dehydration of sludge; the steam disc dryer is suitable for drying the sludge; the spiral conveyor is suitable for conveying dried sludge; the incinerator is suitable for drying and incinerating sludge; the waste heat boiler is suitable for absorbing the heat of high-temperature waste gas in the incinerator.
The discharge port of the membrane filter press is connected with the feed port of the steam disc dryer, the discharge port of the steam disc dryer is connected with the feed port of the screw conveyer, the outlet of the screw conveyer is connected with the feed port of the incinerator, and the smoke outlet of the incinerator is connected with the smoke inlet of the waste heat boiler.
The incinerator adopts a bubbling type incinerator, the combustion temperature is 850 ~ 950 ℃, the retention time of the temperature of the smoke generated by incineration is more than 850 ℃ for more than 2 seconds, the primary air of the incinerator is extracted from the atmosphere, and the secondary air is the exhaust air of the drier.
The waste heat boiler is an existing mature product and comprises a flue gas inlet, a flue gas outlet, a steam outlet and a water inlet; the method mainly recycles the flue gas heat of the incinerator, utilizes the part of the flue gas heat to generate high-temperature saturated steam, and applies work by means of the steam.
Specifically, as shown in fig. 2, a steam outlet of the exhaust-heat boiler is connected to a steam power generation system; the steam power generation system comprises a high-pressure steam turbine, a reheater, a low-pressure steam turbine, a condenser, a low-pressure preheater, a high-pressure preheater and a deaerator; the waste heat boiler's steam outlet is connected with the high pressure steam turbine air inlet, the re-heater is connected to the high pressure steam turbine gas outlet, the low pressure steam turbine is connected to the re-heater gas outlet, the condenser is connected to the gas outlet of low pressure steam turbine, the low pressure pre-heater is connected to the condenser delivery port, the high pressure pre-heater is connected to the low pressure pre-heater, the oxygen-eliminating device is connected to the high pressure pre-heater, the oxygen-eliminating device is connected with the waste heat boiler water inlet.
The steam power generation system comprises the following working procedures: saturated water firstly enters a steam pipeline in a waste heat boiler and exchanges heat with high-temperature flue gas in an incinerator to become saturated steam, then enters a superheater in the waste heat boiler to become superheated steam with the pressure of 4MPa and the temperature of 400 ℃, then enters a high-pressure steam turbine set to generate power, then enters a reheater to heat, the heated steam enters a low-pressure steam turbine set to generate power and then is discharged into a condenser to be condensed, meanwhile, part of steam extracted by a low-pressure steam turbine enters a steam disc dryer to dry sludge, the water condensed in the steam disc dryer and low-temperature steam enter the condenser to be mixed with valve gas of the low-pressure steam turbine, then enter the low-pressure heater and the high-pressure heater, and enter the waste heat boiler through a deaerator and a water feed pump at one time;
the system adopts a high-pressure steam turbine and a low-pressure steam turbine, valve air at the outlet of the high-pressure steam turbine is reheated and heated and then enters the low-pressure steam turbine to generate electricity for reuse, so that the utilization rate of water vapor can be improved, and the generating efficiency is improved;
the reheater utilizes the steam in the steam pocket to exchange heat with the steam at the outlet of the high-pressure steam turbine, the temperature of the steam is increased, the steam enters the low-pressure steam turbine to further generate electricity, the reheater has various heat exchange modes such as convection, radiation and semi-radiation, and can adopt various structures, and the convection reheater has countercurrent, cocurrent and mixed flow, single tube rings, double tube rings and multi tube rings, and is in-line, staggered, vertical and horizontal, parallel to the front wall and vertical to the front wall. A convection reheater is a reheater that primarily absorbs convection heat; the radiant reheater is a reheater for absorbing hearth radiation; a semi-radiant reheater (i.e., a platen superheater) refers to a reheater that absorbs relatively much furnace radiation (1/2 where the radiation absorbs more heat than the total heat).
The low-pressure and high-pressure preheaters extract superheated steam in the working process of the low-pressure and high-pressure steam turbines to heat, the temperature of condensed water can be increased to be higher than 100 ℃, and then the primarily heated condensed water is pumped into a waste heat boiler under the action of a feed water pump.
The steam outlet of the low pressure turbine is connected with the steam disc dryer through a branch pipeline and is suitable for providing steam for the steam disc dryer. Therefore, the sludge can be dried by fully utilizing the heat of the steam, the sludge is effectively recycled, and the cost of sludge disposal is reduced.
Specifically, the sludge deep-dewatering drying incineration power generation system of the utility model also comprises a flue gas treatment system, wherein the flue gas treatment system comprises an SNCR system, a semi-dry reactor, an activated carbon ejector, a bag-type dust collector and an SCR system; the SNCR system is arranged between the smoke outlet of the incinerator and the smoke inlet of the waste heat boiler; the waste heat boiler flue gas outlet is connected with a semi-dry reactor, the semi-dry reactor is connected with a bag-type dust collector, the bag-type dust collector is connected with an SCR system, and the SCR system is connected with a chimney; the activated carbon ejector is arranged on a flue gas pipeline between the cloth bag dust collector and the semi-dry reactor.
The working principle of the flue gas treatment system is as follows: the method comprises the following steps that firstly, the content of nitrogen oxides in flue gas is reduced by an SNCR system, then the flue gas passes through a waste heat boiler, saturated water of a water feeding pump is heated to superheated steam, the flue gas enters an air preheater to heat primary combustion-supporting air, then the flue gas enters a semi-dry reactor, slaked lime is sprayed in the semi-dry reactor to reduce sulfides in the flue gas, activated carbon is sprayed in a pipeline before the flue gas enters a bag-type dust remover to remove dioxin in the flue gas, particles in the flue gas are removed in the bag-type dust remover, then the flue gas enters an SCR system to spray ammonia water for further denitration.
Specifically, in order to fully utilize the heat of the flue gas, a flue gas outlet of the waste heat boiler is connected with a flue gas inlet of an air preheater, and a flue gas outlet of the air preheater is connected with a semi-dry reactor;
a heat exchange air inlet of the air preheater is connected with a primary fan, and a heat exchange air outlet of the air preheater is connected with an air inlet of the incinerator; an ignition device is arranged on the incinerator, and a combustion-supporting air port of the ignition device is connected with a heat exchange air outlet of the air preheater.
Specifically, before the sludge enters the membrane filter press, the sludge is prevented from entering a sludge temporary storage, and a discharge hole of the sludge temporary storage is connected with a feed hole of the membrane filter press; and an air outlet of the sludge temporary storage warehouse is connected with a secondary fan, and the secondary fan is connected with an air inlet of the incinerator. The secondary fan extracts the sludge temporary storage warehouse and performs primary dehumidification on the sludge.
And the crushing and screening machine is suitable for screening dry coal, and a discharge port of the crushing and screening machine is connected with a feed port of the spiral conveyor. When entering the screw conveyor, the sludge enters together with the screened dry coal, the dry coal and the sludge are fully and uniformly stirred together, and then the dry coal and the sludge enter the incinerator together for incineration, so that the sludge can be fully combusted.
This patent is the flow of dry coal: the coal blocks are firstly stored in a dry coal bunker, the storage capacity of the dry coal bunker is 30 days, then the coal blocks enter a crusher through a belt conveyor to be crushed, crushed coal powder and sludge are mixed in a mixer, and then the coal powder and the sludge are conveyed to an incinerator together.
The utility model discloses a mud takes off futilely deeply burns power generation system's theory of operation: the method comprises the steps that sludge is conveyed to a membrane filter press through a screw, part of chemical is added into the membrane filter press according to the actual requirement of the sludge to reduce the water content of the sludge from 80% to 60%, the deeply-removed sludge enters a steam disc dryer through a scraper conveyor, the steam disc dryer extracts part of steam from a low-pressure steam turbine unit to be used as a heat source to dry the sludge, the water content of the sludge is reduced from 60% to 40%, the dried sludge enters a middle temporary storage bin, then the dried sludge is mixed according to the proportion of the dried sludge and pulverized coal, the mixed sludge enters a fluidized bed incinerator through a bucket elevator to be incinerated, the incinerated slag enters a slag cooler to be cooled, and then the slag enters a slag bin to be subjected to subsequent treatment, and can be used as an additive of building materials or a foundation or is buried.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A sludge deep-drying incineration power generation system is characterized by comprising
The membrane filter press is suitable for deep dehydration of sludge;
the steam disc dryer is suitable for drying the sludge;
the spiral conveyor is suitable for conveying dried sludge;
the incinerator is suitable for drying and incinerating sludge;
the waste heat boiler is suitable for absorbing the heat of high-temperature waste gas in the incinerator;
the discharge port of the membrane filter press is connected with the feed port of the steam disc dryer, the discharge port of the steam disc dryer is connected with the feed port of the screw conveyer, the outlet of the screw conveyer is connected with the feed port of the incinerator, and the smoke outlet of the incinerator is connected with the smoke inlet of the waste heat boiler.
2. The system for generating electricity by deeply dehydrating, incinerating and burning sludge as claimed in claim 1, wherein the steam outlet of the waste heat boiler is connected with a steam generating system;
the steam power generation system comprises a high-pressure steam turbine, a reheater, a low-pressure steam turbine, a condenser, a low-pressure preheater, a high-pressure preheater and a deaerator;
the waste heat boiler's steam outlet is connected with the high pressure steam turbine air inlet, the re-heater is connected to the high pressure steam turbine gas outlet, the low pressure steam turbine is connected to the re-heater gas outlet, the condenser is connected to the gas outlet of low pressure steam turbine, the low pressure pre-heater is connected to the condenser delivery port, the high pressure pre-heater is connected to the low pressure pre-heater, the oxygen-eliminating device is connected to the high pressure pre-heater, the oxygen-eliminating device is connected with the waste heat boiler water inlet.
3. The system for generating electricity by deeply drying sludge and incinerating the sludge as claimed in claim 2, wherein the steam outlet of the low pressure turbine is connected with the steam disc dryer through a branch pipeline and is adapted to provide steam to the steam disc dryer.
4. The system for generating power by deeply dehydrating, incinerating and incinerating sludge according to claim 1, further comprising a flue gas treatment system, wherein the flue gas treatment system comprises an SNCR system, a semi-dry reactor, an activated carbon injector, a bag-type dust collector and an SCR system;
the SNCR system is arranged between the smoke outlet of the incinerator and the smoke inlet of the waste heat boiler;
the waste heat boiler flue gas outlet is connected with a semi-dry reactor, the semi-dry reactor is connected with a bag-type dust collector, the bag-type dust collector is connected with an SCR system, and the SCR system is connected with a chimney;
the activated carbon ejector is arranged on a flue gas pipeline between the cloth bag dust collector and the semi-dry reactor.
5. The system for generating power by deeply drying and incinerating sludge as claimed in claim 4, wherein the flue gas outlet of the waste heat boiler is connected with the flue gas inlet of an air preheater, and the flue gas outlet of the air preheater is connected with the semi-dry reactor;
a heat exchange air inlet of the air preheater is connected with a primary fan, and a heat exchange air outlet of the air preheater is connected with an air inlet of the incinerator;
an ignition device is arranged on the incinerator, and a combustion-supporting air port of the ignition device is connected with a heat exchange air outlet of the air preheater.
6. The system for generating electricity by deeply dehydrating and incinerating sludge as claimed in claim 1, further comprising a sludge temporary storage, wherein a discharge port of the sludge temporary storage is connected with a feed port of a membrane filter press;
and an air outlet of the sludge temporary storage warehouse is connected with a secondary fan, and the secondary fan is connected with an air inlet of the incinerator.
7. The system for generating electricity by deeply drying sludge and incinerating sludge as claimed in claim 1, further comprising a crushing and screening machine adapted to screen dry coal, wherein the discharge port of the crushing and screening machine is connected with the feed port of the screw conveyor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920788885.4U CN209944349U (en) | 2019-05-29 | 2019-05-29 | Sludge deep-dehydration and drying incineration power generation system |
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| CN201920788885.4U CN209944349U (en) | 2019-05-29 | 2019-05-29 | Sludge deep-dehydration and drying incineration power generation system |
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| CN209944349U true CN209944349U (en) | 2020-01-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068013A (en) * | 2019-05-29 | 2019-07-30 | 上海环境工程设计研究院有限公司 | A kind of deeply de- anhydration and incineration electricity generation system of sludge |
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2019
- 2019-05-29 CN CN201920788885.4U patent/CN209944349U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068013A (en) * | 2019-05-29 | 2019-07-30 | 上海环境工程设计研究院有限公司 | A kind of deeply de- anhydration and incineration electricity generation system of sludge |
| CN110068013B (en) * | 2019-05-29 | 2024-03-08 | 上海环境工程设计研究院有限公司 | Sludge deep-dewatering drying incineration power generation system |
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