CN208687738U - A kind of power generation by waste combustion system - Google Patents

A kind of power generation by waste combustion system Download PDF

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Publication number
CN208687738U
CN208687738U CN201820534363.7U CN201820534363U CN208687738U CN 208687738 U CN208687738 U CN 208687738U CN 201820534363 U CN201820534363 U CN 201820534363U CN 208687738 U CN208687738 U CN 208687738U
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China
Prior art keywords
flue gas
power generation
waste
combustion
waste combustion
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CN201820534363.7U
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Inventor
胡国荣
方杨
杨宏伟
刘洋
孙丽娟
童瑶
邵哲如
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Everbright Envirotech China Ltd
Everbright Environmental Protection Research Institute Nanjing Co Ltd
Everbright Environmental Technology Research Institute Shenzhen Co Ltd
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Everbright Envirotech China Ltd
Everbright Environmental Protection Research Institute Nanjing Co Ltd
Everbright Environmental Technology Research Institute Shenzhen Co Ltd
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Priority to CN201820534363.7U priority Critical patent/CN208687738U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/12Heat utilisation in combustion or incineration of waste

Abstract

The utility model provides a kind of power generation by waste combustion system, comprising: danger wastes incinerator is configured to burn danger wastes and generates high-temperature flue gas;Waste heat boiler is configured to the heat working-medium water using the high-temperature flue gas, to generate saturated vapor;Screw expansion motor is configured to the driven generator under the action of saturated vapor and generates electricity.Power generation by waste combustion system provided by the utility model replaces Steam Turbine Driven electrical power generators using screw expansion motor, and Load Regulation ability is strong, reliable for operation, structure is simple.

Description

A kind of power generation by waste combustion system
Technical field
The utility model relates to waste incineration and generating electricity technologies, in particular to a kind of power generation by waste combustion system.
Background technique
Danger wastes refer to the method according to as defined in unification of the motherland identify assert have corrosivity, toxicity, inflammability, The properties such as reactivity, there is the waste of adverse effect to environment or human health, as hospital clinical waste, refuse battery, Waste mineral oil etc..Since danger wastes can bring adverse effect to human body, animal and environment, it is therefore desirable to which it is special to carry out to it Management and disposal process.Danger wastes are subjected to burning disposal, be a kind of reduced training it is most obvious, it is innoxious most thoroughly, The method for burning the processing danger wastes that heat can efficiently use, thus be widely used.
Danger wastes burning can generate high-temperature flue gas, flue gas be brought out after by waste heat boiler.The waste heat boiler steam Parameter is lower, is typically below the saturated vapor of 1.5MPa, mainly for the production of with life vapour, for larger danger Castoff burning treatment plant, steam production have more the factory without external steam supply demand much higher than production and life steam consumption Steam thermal energy cannot utilize very well, and utilization rate is very low, cause huge waste heat energy waste, while on-site electricity consumption is complete Portion is originated from outside, increases operating cost.
In order to more preferably utilize its extra steam thermal energy, reduces off-site and draw electricity, people are by introducing steam turbine generator Group generates saturated vapor driving Turbo-generator Set using waste heat boiler and generates electricity, and the electricity of sending is personal for plant area.But steam turbine one As be suitable for superheated steam, according to saturated vapor then need setting steam water separator then needed according to superheated steam Increase superheater, while the requirement using steam turbine to water quality is high, needs preferable water treatment facilities, increases answering for system Polygamy and cost of water treatment, in addition the load fluctuation of danger wastes incinerator is larger, and steam turbine is very quick to load variations Sense, not in declared working condition, efficiency will sharply decline, and steam turbine structure is complicated, and 2-3 needs repairing once, and later period maintenance is taken With higher.
Therefore, it is necessary to a kind of new power generation by waste combustion system be proposed, to solve the above problems.
Utility model content
A series of concept of reduced forms is introduced in utility model content part, this will be in specific embodiment part Middle further description.The utility model content part of the utility model is not meant to attempt to limit claimed Technical solution key feature and essential features, do not mean that the guarantor for attempting to determine technical solution claimed more Protect range.
In order at least be partially solved the above problem, the utility model discloses a kind of power generation by waste combustion system, the burnings Electricity generation system includes:
Danger wastes incinerator is configured to burn danger wastes and generates high-temperature flue gas;
Waste heat boiler is configured to the heat working-medium water using the high-temperature flue gas, to generate saturated vapor;And
Screw expansion motor is configured to the driven generator under the action of saturated vapor and generates electricity.
Illustratively, the power generation by waste combustion system further includes gas-distributing cylinder, and the gas-distributing cylinder is configured to the saturated vapor It is divided into first part and second part, wherein the saturated vapor of the first part is used as auxiliary steam, the second part The saturated vapor enter the screw expansion motor.
Illustratively, the power generation by waste combustion system further includes condenser, and the condenser arrangement is that the condensation screw rod is swollen The steam discharge of swollen engine, to form condensed water.
Illustratively, the power generation by waste combustion system further includes oxygen-eliminating device, the oxygen-eliminating device be configured to the condensed water into Row heating deoxygenation.
Illustratively, the power generation by waste combustion system further includes feed pump, and the feed water pump matching is by the condensate pump Enter the waste heat boiler, to become the working-medium water.
Illustratively, the power generation by waste combustion system further includes chilling tower, and the chilling tower configuration is cooling from the waste heat The high-temperature flue gas after heat exchange of boiler discharge, and low-temperature flue gas is discharged.
Illustratively, the power generation by waste combustion system further includes flue gas purification device, and the flue gas purification device is configured to take off Except the harmful components in the low-temperature flue gas, and flue gas up to standard is discharged.
Illustratively, the power generation by waste combustion system further includes air-introduced machine, and the air-introduced machine is configured to the flue gas up to standard It is sent into chimney and is discharged into atmosphere.
Illustratively, the danger wastes incinerator includes rotary kiln and secondary combustion chamber, and the rotary kiln is used for The drying, gasification and primary combustion of the danger wastes are carried out, and generates flue gas, the secondary combustion chamber is described for decomposing Micro-content organism and dioxin in flue gas.
Power generation by waste combustion system provided by the utility model replaces Steam Turbine Driven generator using screw expansion motor Power generation, Load Regulation ability is strong, reliable for operation, structure is simple.
Detailed description of the invention
The following drawings of the utility model is used to understand the utility model in this as a part of the utility model.Attached drawing In show the embodiments of the present invention and its description, for explaining the principles of the present invention.
In attached drawing:
Fig. 1 shows the structural schematic diagram of the power generation by waste combustion system according to one embodiment of the utility model.
Description of symbols:
Danger wastes incinerator 1
Waste heat boiler 2
Gas-distributing cylinder 3
Screw expansion motor 4
Generator 5
Condenser 6
Oxygen-eliminating device 7
Feed pump 8
Chilling tower 9
Flue gas purification device 10
Air-introduced machine 11
Chimney 12
Specific embodiment
In the following description, a large amount of concrete details are given more thoroughly to manage in order to provide to the utility model Solution.It is, however, obvious to a person skilled in the art that the utility model may not need it is one or more of these thin It saves and is carried out.In other examples, in order to avoid obscuring with the utility model, for more well known in the art Technical characteristic is not described.
In order to thoroughly understand the utility model, detailed step will be proposed in following description, it is practical to illustrate The power generation by waste combustion system of novel proposition.Obviously, the execution of the utility model is not limited to those skilled in the art and is familiar with Specific details.The preferred embodiment of the utility model is described in detail as follows, however other than these detailed descriptions, this is practical new Type can also have other embodiments.
It should be understood that when the term " comprising " and/or " including " is used in this specification, indicating described in presence Feature, entirety, step, operation, element and/or component, but do not preclude the presence or addition of other one or more features, entirety, Step, operation, element, component and/or their combination.
Danger wastes are subjected to burning disposal, be a kind of reduced training it is most obvious, it is innoxious most thoroughly, burn heat can In the method for the processing danger wastes of effective use, thus it is widely used.The burning process of general danger wastes In two stages, the first stage carries out in rotary kiln, about 850-1000 DEG C of kiln temperature, is substantially carried out the dry of danger wastes Dry, gasification and primary combustion;Second stage carries out in dual firing chamber, and flue gas enters dual firing chamber from rotary kiln, at 1100 DEG C It is stopped at a high temperature of above and is no less than 2s, decompose micro-content organism and dioxin in flue gas sufficiently, it is ensured that entered and burn The danger wastes full combustion of burning system.Flue gas is by waste heat boiler after dual firing chamber's extraction, and temperature is by original 1100 DEG C It is down to 500 DEG C above.Above-mentioned waste heat boiler steam parameter is lower, is typically below the saturated vapor of 1.5MPa, is mainly used for giving birth to It produces and lives and use vapour, for larger danger wastes burning disposal factory, steam production is much higher than production and life vapour Amount, for the factory without external steam supply demand, the steam thermal energy having more cannot utilize very well, and utilization rate is very low, cause huge Big waste heat energy waste, while on-site electricity consumption is all originated from outside, increases operating cost.
In order to more preferably utilize its extra steam thermal energy, reduces off-site and draw electricity, people are by introducing steam turbine generator Group generates saturated vapor driving Turbo-generator Set using waste heat boiler and generates electricity, and the electricity of sending is personal for plant area.But steam turbine one As be suitable for superheated steam, according to saturated vapor then need setting steam water separator then needed according to superheated steam Increase superheater, while the requirement using steam turbine to water quality is high, needs preferable water treatment facilities, increases answering for system Polygamy and cost of water treatment, in addition the load fluctuation of danger wastes incinerator is larger, and steam turbine is very quick to load variations Sense, not in declared working condition, efficiency will sharply decline, and steam turbine structure is complicated, and 2-3 needs repairing once, and later period maintenance is taken With higher.
For at least one above-mentioned problem, the utility model provides a kind of power generation by waste combustion system, comprising: danger wastes Incinerator is configured to burn danger wastes and generates high-temperature flue gas;Waste heat boiler is configured to utilize the high-temperature flue gas Heat working-medium water, to generate saturated vapor;And screw expansion motor, it is configured under the action of the saturated vapor Driven generator power generation.Power generation by waste combustion system provided by the utility model replaces Steam Turbine Driven using screw expansion motor Electrical power generators, Load Regulation ability is strong, reliable for operation, structure is simple.
It is described in detail below with reference to power generation by waste combustion system of the Fig. 1 to one embodiment of the utility model.
As shown in Figure 1, power generation by waste combustion system provided in this embodiment includes danger wastes incinerator 1, waste heat boiler 2, gas-distributing cylinder 3, screw expansion motor 4, generator 5, condenser 6, oxygen-eliminating device 7, feed pump 8, chilling tower 9, gas cleaning dress Set 10, air-introduced machine 11 and chimney 12.
Wherein, danger wastes incinerator 1 is configured to burn danger wastes and generates high-temperature flue gas.It is described dangerous useless Gurry refers to properties such as toxicity, inflammability, explosion hazard, corrosivity, chemical reactions, can cause to human health and environment The waste of harm, such as hospital clinical waste, polychlorinated biphenyl waste, refuse battery, waste mineral oil, mercurous discarded fluorescent lamp Pipe etc..Danger wastes incinerator 1 specifically includes rotary kiln and secondary combustion chamber.Danger wastes are entered by feed inlet first Rotary kiln is tentatively gasified in rotary kiln, is burnt, and then uncombusted particulate matter, gas and organic matter enter secondary Combustion chamber (dual firing chamber) carries out full combustion, while the substances such as dioxin are sufficiently decomposed, and dioxin is in dual firing chamber by quilt Uniform and stable high temperature is broken to CO completely2、HCl、H2O.Illustratively, the rotary kiln temperature is greater than 850 DEG C, described two It fires room temperature and is greater than 1100 DEG C.
The rotary kiln includes various downflow type rotary kilns or counter current rotary kiln commonly used in the art.In one embodiment In, the rotary kiln is downflow type rotary kiln, and wherein danger wastes preheat in kiln, burn and the after-flame stage is more bright Aobvious, the arrangement of charging, air inlet and auxiliary burner is easy, and convenient operating maintenance is conducive to the charging and preposition processing of waste, together When gas residence time it is longer.In another embodiment, the rotary kiln be counter current rotary kiln, such rotary kiln can provide compared with Good gas, solid mixing and contact, heat transfer efficiency is high, can increase its burning velocity.
The high-temperature flue gas being discharged from the secondary combustion chamber of danger wastes incinerator 1 enters in waste heat boiler 2, with working medium Water exchanges heat, and working-medium water heat absorption is made to flash to saturated vapor.Illustratively, the waste heat boiler 2 is film-type wall-type waste heat pot Furnace.The saturated vapor generated in waste heat boiler 2 enters screw expansion motor 4, and with the high-temperature flue gas after working-medium water heat exchange from Waste heat boiler be reduced to after coming out 500 DEG C hereinafter, and being for further processing into chilling tower 9.
In the present embodiment, the saturated vapor initially enters gas-distributing cylinder 3.The gas-distributing cylinder 3 is configured to saturated vapor Originally it is divided into first part and second part, wherein the saturated vapor of first part is used as auxiliary steam and meets process steam needs, the The saturated vapor of two parts enters screw expansion motor 4.
Screw expansion motor 4 is configured to the driven generator 5 under the action of the saturated vapor and generates electricity.Specifically, spiral shell Bar expansion motive power machine 4 is a kind of positive displacement generator, is mainly made using the expansion of hot fluid volume in yin, yang screw rod conduit With promotion yin, yang screw rod rotates round about, realizes that thermal energy is converted into the work done of mechanical energy.It is swollen that saturated vapor enters screw rod After swollen engine 4, by dilatation, decompression, expansion, 4 work done of lead-screw expansion motive power machine, and coaxial generator 5 is driven Power generation, the electric energy that generator 5 generates is personal for plant area, to make full use of extra steam thermal energy, reduces off-site and draws electricity Amount, reduces operating cost.
Due to screw expansion motor 4 have extensive heat source applicability, can be adapted for superheated steam, saturated vapor, Steam water interface and shunting body with high salt etc., therefore the utility model does not need superheater and special water treatment facilities, only with General water treatment facilities, system structure is simpler, and investment is lower, repairs more convenient.
In addition, danger wastes burning load variations fluctuation is larger, and internal efficiency of the steam turbine under non-rated load will It substantially reduces.In contrast, screw expansion motor 4 used by the utility model heat source load and parameter area (from 10%-120%) change in the case where fluctuating, not only stable and reliable operation but also high efficiency smooth, therefore the utility model is mentioned The power generation by waste combustion system of confession has very superior variable working condition ability.
The steam discharge for finishing function in screw expansion motor 4 successively passes through condenser 6 and oxygen-eliminating device 7.Wherein, condenser 6 For being condensed the exhaust to form condensed water.In the present embodiment, condenser 6 utilizes cooling water condensation steam, i.e., After the steam being discharged from screw expansion motor 4 enters condenser 6, exchanges heat with cooling water, to reduce temperature, be condensed into solidifying It bears water.Oxygen-eliminating device 7 is used to heat the oxygen removed in condensed water.Then, the condensed water is pumped into waste heat boiler through feed pump 8 again 2 to become working-medium water, and working-medium water carries out the heat exchange cycle of a new round in waste heat boiler 2 with new high-temperature flue gas.
In order to avoid dioxin 200-500 DEG C at a temperature of regenerative response occurs, high-temperature flue gas comes out from waste heat boiler 2 Temperature is reduced to 500 DEG C hereinafter, subsequently entering chilling tower 9 afterwards, and with room temperature water mist contact heat-exchanging, the flue-gas temperature after heat exchange is reduced to 200 DEG C or less.
Later, flue gas enters flue gas purification device 10, and flying dust, sour gas in flue gas are removed in flue gas purification device 10 The harmful components such as body, heavy metal, and the flue gas up to standard for reaching discharge standard is discharged.Illustratively, the flue gas purification device packet Include set gradually for implement SNCR denitration SNCR device, for implementing semi-dry depickling semidry method reaction tower, be used for Implement the dry-process deacidification tower of dry-process deacidification cooling, the bag filter for implementing activated carbon adsorption and bag-type dust, be used in fact Apply the steam-heated steam heater being set between the bag filter and low-temperature SCR device, for implementing low-temperature SCR The low-temperature SCR device of denitration, the cigarette being set between the low-temperature SCR device and wet scrubbing tower for implementing flue gas heat exchange Gas smoke gas heat exchanger, the wet scrubbing tower for implementing wet process depickling, and another steam for implementing flue gas removing white haze Heater etc..Flue gas up to standard is sent into chimney 12 under the swabbing action of air-introduced machine 11, and is discharged into atmosphere.
It continues to refer to figure 1, the illustrative power cycle of power generation by waste combustion system provided in this embodiment are as follows: endanger first Dangerous waste burns in danger wastes incinerator 1, and danger wastes incinerator 1 is by rotary kiln and second-time burning Room composition, danger wastes are tentatively gasified in rotary kiln of the kiln temperature greater than 850 DEG C first, are burnt, then unburned Most particulate matter, gas and organic matter enters secondary combustion chamber of the temperature greater than 1100 DEG C and carries out full combustion, makes simultaneously The substances such as dioxin sufficiently decompose;The high-temperature flue gas come out from the secondary combustion chamber of danger wastes incinerator 1 enters waste heat It exchanges heat in boiler 2 with working-medium water, enters gas-distributing cylinder 3 after so that working-medium water heat absorption evaporation is become saturated vapor, into gas-distributing cylinder 3 Saturated vapor a part be used as auxiliary steam meet process steam needs, residual steam enters screw expansion motor 4, through expansion Hold, decompression, expansion, 4 work done of lead-screw expansion motive power machine, and co-axial generator 5 is driven to generate electricity, it is personal for plant area; The steam discharge for finishing function enters condenser 6 and is condensed, later using oxygen-eliminating device 7 remove working medium in oxygen, through feed pump 8 by its Again it is pumped into waste heat boiler 2 and new high-temperature flue gas carries out the heat exchange cycle of a new round;In order to avoid dioxin is at 200-500 DEG C At a temperature of occur regenerative response, high-temperature flue gas from waste heat boiler 2 come out after temperature be reduced to 500 DEG C hereinafter, subsequently entering urgency Cold tower 9, with room temperature water mist contact heat-exchanging, the flue-gas temperature after heat exchange is reduced to 200 DEG C hereinafter, entering flue gas purification device later 10, the harmful components such as flying dust, sour gas, the heavy metal in flue gas are removed in flue gas purification device 10 to become cigarette up to standard Gas, flue gas up to standard are sent into chimney 12 under the swabbing action of air-introduced machine 11 and are discharged into atmosphere.
Power generation by waste combustion system provided by the present embodiment is sent out using screw expansion motor instead of Steam Turbine Driven generator Electricity, Load Regulation ability is strong, reliable for operation, structure is simple.
Unless otherwise defined, the technology of technical and scientific term used herein and the technical field of the utility model The normally understood meaning of personnel is identical.Term used herein is intended merely to describe specifically to implement purpose, it is not intended that limit The utility model processed.Terms such as herein presented " settings " can both indicate that a component was attached directly to another portion Part can also indicate that a component is attached to another component by middleware.The spy described in one embodiment herein Sign can be applied in combination another embodiment individually or with other feature, unless this feature is in another embodiment It is not suitable for or is otherwise noted.
The utility model is illustrated through the foregoing embodiment, but it is to be understood that, above-described embodiment is Purpose for illustrating and illustrating, and be not intended to limit the invention within the scope of described embodiment.Furthermore ability Field technique personnel are it is understood that the utility model is not limited to above-described embodiment, and introduction according to the present utility model is also More kinds of variants and modifications can be made, these variants and modifications all fall within the utility model range claimed with It is interior.The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims (9)

1. a kind of power generation by waste combustion system, which is characterized in that the power generation by waste combustion system includes:
Danger wastes incinerator is configured to burn danger wastes and generates high-temperature flue gas;
Waste heat boiler is configured to the heat working-medium water using the high-temperature flue gas, to generate saturated vapor;And
Screw expansion motor is configured to the driven generator under the action of saturated vapor and generates electricity.
2. power generation by waste combustion system according to claim 1, which is characterized in that it further include gas-distributing cylinder, the gas-distributing cylinder configuration For the saturated vapor is divided into first part and second part, wherein the saturated vapor of the first part is used as station-service The saturated vapor of vapour, the second part enters the screw expansion motor.
3. power generation by waste combustion system according to claim 1, which is characterized in that it further include condenser, the condenser arrangement For the steam discharge for condensing the screw expansion motor, to form condensed water.
4. power generation by waste combustion system according to claim 3, which is characterized in that it further include oxygen-eliminating device, the oxygen-eliminating device configuration To carry out heating deoxygenation to the condensed water.
5. power generation by waste combustion system according to claim 3 or 4, which is characterized in that further include feed pump, the feed pump is matched It is set to and the condensed water is pumped into the waste heat boiler, to become the working-medium water.
6. power generation by waste combustion system according to claim 1, which is characterized in that it further include chilling tower, the chilling tower configuration To cool down the high-temperature flue gas after heat exchange being discharged from the waste heat boiler, and low-temperature flue gas is discharged.
7. power generation by waste combustion system according to claim 6, which is characterized in that it further include flue gas purification device, the flue gas Purification device is configured to remove the harmful components in the low-temperature flue gas, and flue gas up to standard is discharged.
8. power generation by waste combustion system according to claim 7, which is characterized in that it further include air-introduced machine, the air-introduced machine configuration For the flue gas up to standard is sent into chimney and is discharged into atmosphere.
9. power generation by waste combustion system according to claim 1, which is characterized in that the danger wastes incinerator includes back Rotary kiln and secondary combustion chamber, the rotary kiln are used to carry out the drying, gasification and primary combustion of the danger wastes, and generate Flue gas, the secondary combustion chamber are used to decompose the micro-content organism and dioxin in the flue gas.
CN201820534363.7U 2018-04-13 2018-04-13 A kind of power generation by waste combustion system Active CN208687738U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111964464A (en) * 2020-08-28 2020-11-20 焦作市英利经贸有限公司 Waste heat power generation system of calcining furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111964464A (en) * 2020-08-28 2020-11-20 焦作市英利经贸有限公司 Waste heat power generation system of calcining furnace

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