CN108731004A - The cooling back installation and waste incineration and generating electricity device of water-cooled grate - Google Patents
The cooling back installation and waste incineration and generating electricity device of water-cooled grate Download PDFInfo
- Publication number
- CN108731004A CN108731004A CN201810522837.0A CN201810522837A CN108731004A CN 108731004 A CN108731004 A CN 108731004A CN 201810522837 A CN201810522837 A CN 201810522837A CN 108731004 A CN108731004 A CN 108731004A
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- Prior art keywords
- water
- grate
- cooling water
- fire grate
- cooled
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H3/00—Grates with hollow bars
- F23H3/02—Grates with hollow bars internally cooled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
Abstract
The present invention provides a kind of cooling back installation and waste incineration and generating electricity device of water-cooled grate, and the cooling back installation of the water-cooled grate includes：Fire grate cooling water pump, for recirculated cooling water to be pumped in the water-cooled grate, to be cooled down to the water-cooled grate；Air preheater, for heating air using the recirculated cooling water imported by water-cooled grate；Fire grate water- to-water heat exchanger, for utilizing the recirculated cooling water heating condensate water imported by water-cooled grate；Allocation unit, the allocation unit is for controlling the amount for importing the recirculated cooling water in the air preheater and the fire grate water- to-water heat exchanger by the water-cooled grate.The distribution that the heat of recirculated water absorption can be adjusted as desired in the cooling back installation of water-cooled grate according to the present invention reduces the consumption of system charge to the greatest extent under the premise of its heat is fully utilized.Waste incineration and generating electricity device according to the present invention has the advantages that similar.
Description
Technical field
The present invention relates to water-cooled grate cooling technologies, in particular to the cooling back installation and rubbish of a kind of water-cooled grate
Rubbish electric generator set by burning.
Background technology
With the increase of domestic waste incineration proportion, domestic waste calorific value is also higher and higher.This is because：On the one hand
It is since city garbage specification is more and more perfect, the ingredient of kitchen is fewer and fewer in house refuse；What another aspect city generated
The demand of industrial refuse harmlessness disposing is also increasing, and the universal calorific value of industrial refuse is higher.When high fever calorific value waste incineration
Ignition temperature is high, the bed of material is thin, can there are problems that fire grate overtemperature using traditional air-cooled incineration furnace grate, the fire grate segment service life is significantly
Reduction.It is suitble to the water-cooled grate of high fever waste incinerator, the fire grate segment of incinerator is cooled down by independent recirculating cooling water system,
The temperature of fire grate segment is set to be controlled always at 100 DEG C hereinafter, being particularly suitable for the burning of high heating value rubbish.
Water at low temperature is sent into water-cooled grate by the recirculating cooling water system of water-cooled grate by water pump, and water at low temperature passes through water cooling
Temperature rise becomes high-temperature water after fire grate, and high-temperature water cools down using a heat exchanger, then becomes water at low temperature, and so cycle is constituted
The recirculating cooling water system of water-cooled grate.The heat of the recirculating cooling water system of general water-cooled grate or into primary at present
Wind preheater, to improve a wind-warm syndrome；Directly heat condensed water, to improve feed temperature, however this method exist with
Lower disadvantage：
1) when the calorific value of rubbish further increases, the heat that incinerator generates becomes larger, the heat of recirculating cooling water system
It can rise therewith, and the heat of pre- heat primary air is needed to greatly reduce, it cannot so as to cause the heat of recirculating cooling water system
It is all utilized, energy is caused to waste.
If 2) the heat whole heating condensate water of recirculating cooling water system, due to steam turbine building and boiler room distance farther out,
The loss of pipeline is big, and the power consumption of recirculating cooling water system can be bigger.
Therefore, it is necessary to be improved to the cooling back installation of current water-cooled grate, to overcome the above problem.
Invention content
A series of concept of reduced forms is introduced in Summary, this will in the detailed description section into
One step is described in detail.The Summary of the present invention is not meant to attempt to limit technical solution claimed
Key feature and essential features do not mean that the protection domain for attempting to determine technical solution claimed more.
In order to solve the above problems at least partly, one aspect of the present invention discloses a kind of circulating cooling dress of water-cooled grate
It sets, including：
Fire grate cooling water pump, the fire grate cooling water pump are used to recirculated cooling water being pumped in the water-cooled grate, with
The water-cooled grate is cooled down, recirculated cooling water temperature after the water-cooled grate increases；
Air preheater, the air preheater are used to heat using the recirculated cooling water imported by the water-cooled grate empty
Gas, after the recirculated cooling water completes heat exchange in the air preheater with air, temperature reduces and to return to the fire grate cold
But in water pump；
Fire grate water- to-water heat exchanger, the fire grate water- to-water heat exchanger are used to add using the recirculated cooling water imported by the water-cooled grate
Hot condensed water, after the recirculated cooling water completes heat exchange in the fire grate water- to-water heat exchanger with the condensed water, temperature reduces simultaneously
It returns in the fire grate cooling water pump；
Allocation unit, the allocation unit import the air preheater and the stove for controlling by the water-cooled grate
Drain the amount of the recirculated cooling water in heat exchanger.
In one embodiment of the invention, the allocation unit includes three-way control valve.
In order to solve the above problems at least partly, one aspect of the present invention discloses a kind of waste incineration and generating electricity device, packet
It includes：
Waste incinerator is provided for the water-cooled grate of waste incineration in the waste incinerator；
Waste heat boiler, the waste heat boiler is for utilizing the flue gas boiler feedwater shape generated in the waste incinerator
At steam；
Steam turbine, the steam acting that the steam turbine is used to generate using the waste heat boiler drive electrical power generators；
Condenser, the condenser is used to condense the steam for completing acting in the steam turbine, so that described
Steam is changed into condensed water；
Fire grate cooling water pump, the fire grate cooling water pump are used to recirculated cooling water being pumped in the water-cooled grate, with
The water-cooled grate is cooled down, recirculated cooling water temperature after the water-cooled grate increases；
Air preheater, the air preheater are used to be heated using the recirculated cooling water imported by the water-cooled grate and be supplied
To the air to the waste incinerator, to improve the temperature of air, the recirculated cooling water in the air preheater with
After air completes heat exchange, temperature is reduced and is returned in the fire grate cooling water pump；
Fire grate water- to-water heat exchanger, the fire grate water- to-water heat exchanger are used to add using the recirculated cooling water imported by the water-cooled grate
Condensed water of the heat from the condenser, to improve the temperature of the condensed water, the recirculated cooling water is changed in the fire grate water
After completing heat exchange with the condensed water in hot device, temperature is reduced and is returned in the fire grate cooling water pump, and the condensed water passes through
It supplies into the waste heat boiler and is recycled as boiler feedwater after the recirculated cooling water heating；
Allocation unit, the allocation unit import the air preheater and the stove for controlling by the water-cooled grate
Drain the amount of the recirculated cooling water in heat exchanger.
In one embodiment of the invention, the allocation unit includes three-way control valve.
In one embodiment of the invention, further include：Condensate pump, condensate pump setting in the condenser and
Between the fire grate water- to-water heat exchanger, for the condensed water generated in the condenser to be pumped in the fire grate water- to-water heat exchanger.
In one embodiment of the invention, further include：Low-pressure heater, the low-pressure heater is for heating by described
The condensed water that fire grate water- to-water heat exchanger imports, to form boiler feedwater.
In one embodiment of the invention, further include：Oxygen-eliminating device, the oxygen-eliminating device is for removing by the low-pressure heating
Gas contained in the boiler feedwater that device imports.
In one embodiment of the invention, further include：Boiler feed pump, the boiler water pump will be for that will pass through described remove
The boiler feedwater of oxygen device processing is pumped into the waste heat boiler.
The cooling back installation and waste incineration and generating electricity device of water-cooled grate according to the present invention can be according to refuse thermal values
Variation, the flow of the recirculated cooling water of water-cooled grate in condensation heating and air heat two branches is adjusted, when rubbish heat
When being worth relatively low, the heat that recirculated cooling water absorbs is mainly used to heat air (such as First air), when refuse thermal value is relatively high
When, the heat that recirculated cooling water absorbs is mainly used for heating condensate water, and spirit may be implemented in the cold mode of cycle of this water-cooled grate
Switching living is adjusted as desired the distribution of the heat of recirculated water absorption, can as possible subtract under the premise of its heat is fully utilized
The consumption of few system charge.
Description of the drawings
The following drawings of the present invention is used to understand the present invention in this as the part of the present invention.Shown in the drawings of this hair
Bright embodiment and its description, principle used to explain the present invention.
In attached drawing：
Fig. 1 shows the waste incineration and generating electricity device with the cooling back installation of water-cooled grate according to the ... of the embodiment of the present invention
Structural schematic diagram.
Reference sign：
1 water-cooled grate, 2 waste heat boilers, 3 steam turbines, 4 condensers, 5 condensate pumps, 6 fire grate water- to-water heat exchangers, 7 low-pressure heatings
Device, 8 oxygen-eliminating devices, 9 boiler feed pumps, 10 air preheaters, 11 circulating cooling water pumps, 12 allocation units, 100 waste incineration and generating electricities
Device.
Specific implementation mode
In the following description, a large amount of concrete details are given in order to provide more thorough understanding of the invention.So
And it will be apparent to one skilled in the art that the embodiment of the present invention may not need one or more of these details
And it is carried out.In other examples, in order to avoid obscuring with the embodiment of the present invention, for more well known in the art
Technical characteristic is not described.
In order to thoroughly understand the embodiment of the present invention, detailed structure will be proposed in following description.Obviously, the present invention is real
The execution for applying example is not limited to the specific details that those skilled in the art is familiar with.Presently preferred embodiments of the present invention is retouched in detail
State it is as follows, however in addition to these detailed description other than, the present invention can also have other embodiment.
Fig. 1 shows the waste incineration and generating electricity device with the cooling back installation of water-cooled grate according to the ... of the embodiment of the present invention
Structural schematic diagram.With reference to Fig. 1 to the cooling back installation and waste incineration and generating electricity of the water-cooled grate of the embodiment of the present invention
Device is described in detail.
As shown in Figure 1, waste incineration and generating electricity device 100 includes waste incinerator, water-cooled grate 1, waste heat boiler 2, steamer
Machine 3, condenser 4, condensate pump 5, fire grate water- to-water heat exchanger 6, low-pressure heater 7, oxygen-eliminating device 8, boiler feed pump 9, air preheat
Device 10, circulating cooling water pump 11 and allocation unit 12.
Wherein, waste incinerator (not shown) generates the high-temperature flue gas for carrying heat, the high temperature for carrying out waste incineration
Flue gas is entered by flue between waste incinerator and waste heat boiler 2 or pipeline in waste heat boiler 2.Illustratively, in this reality
It applies in example, for the waste incineration suitable for high heating value, uses water-cooled grate 1 in waste incinerator, rubbish is on water-cooled grate 1
It is burned, water-cooled grate is cooled down by recirculated cooling water, to maintain temperature to be in 100 DEG C or less.
Waste heat boiler 2 is used to form steam using the high-temperature flue gas heating boiler feed water generated in the waste incinerator.
Boiler feedwater is pumped to by boiler feed pump 9 in waste heat boiler 2, in waste heat boiler with the high-temperature flue gas from waste incinerator
It is changed into steam after heat exchange, steam is then by Pipeline transport to steam turbine 3.
Steam turbine 3 is used to do work using the steam that the waste heat boiler 2 generates, and to drive electrical power generators, and steams
Vapour is completed to enter in condenser 4 by pipeline after acting in steam turbine 3.
Condenser 4 is used to condense the steam for completing acting in the steam turbine 3, so that the steam is changed into
Condensed water.
Condensate pump 5 is arranged between the condenser 4 and the fire grate water- to-water heat exchanger 6, and being used for will be in the condenser 4
The condensed water of generation is pumped in the fire grate water- to-water heat exchanger 6.
Fire grate water- to-water heat exchanger 6 is heated using the recirculated cooling water imported by the water-cooled grate 1 from the condenser 4
Condensed water, to improve the temperature of the condensed water.After condensed water exchanges heat in fire grate water- to-water heat exchanger 6, entered by connecting pipeline
In low-pressure heater 7.
Low-pressure heater 7 is for heating the condensed water imported by the fire grate water- to-water heat exchanger 6, to form boiler feedwater.Show
Example property, low-pressure heater 7 is led using using some vapor heating for completing acting in steam turbine 3 by fire grate water- to-water heat exchanger 6
The condensed water entered forms boiler feedwater to improve the temperature of condensed water.The boiler feedwater imports oxygen-eliminating device 8 by connecting pipeline
Middle carry out deoxygenation.
Oxygen-eliminating device 8 is used to remove gas contained in the boiler feedwater that is imported by the low-pressure heater 7, for example, oxygen or
Other gases, to improve the quality of boiler feedwater, convenient for forming the steam for meeting design parameter in waste heat boiler 2.
Boiler feed pump 9 is used to pump the boiler feedwater handled by the oxygen-eliminating device 8 into the waste heat boiler 2,
The heat of the high-temperature flue gas generated using waste incinerator in waste heat boiler 2 is changed into steam, utilizes so on circulate.
Air preheater 10 is used to utilize the recirculated cooling water heating supply imported by the water-cooled grate 1 to the rubbish
The air of incinerator, to improve the temperature of air.Illustratively, in the present embodiment, air preheater 10 is supplied for heating
To the First air of the waste incinerator.
As previously mentioned, in the present embodiment, waste incinerator uses water-cooled grate, recirculated cooling water is needed to carry out cold
But.
In the present embodiment, recirculated cooling water by circulating cooling water pump 11 by being pumped in the water-cooled grate 1, with right
The water-cooled grate 1 is cooled down, and recirculated cooling water temperature after the water-cooled grate 1 increases.Recirculated cooling water from
The heat absorbed in water-cooled grate 1 be used to heat the condensed water that condenser 4 is formed and supply to the air of waste incinerator.Tool
Body, recirculated cooling water in water-cooled grate 1 after coming out, and by the distribution of allocation unit 12, partly enters air preheater
In 10, heat exchange is carried out with the air of supply to waste incinerator, improves the temperature of air, while own temperature is reduced and returned to
In the fire grate cooling water pump；Part enter fire grate water- to-water heat exchanger 6 in, in fire grate water- to-water heat exchanger 6 with carry out the cold of condenser 4
Condensate carries out heat exchange, improves the temperature of the condensed water, while temperature is reduced and returned in the fire grate cooling water pump.
In above process, the control of allocation unit 12 imports the air preheater 10 by water-cooled grate 1 and fire grate water changes
The amount of recirculated cooling water in hot device 6.Specifically, when system normal operation, the recirculated cooling water come out by allocation unit 12,
Half, which entered, carries out heat exchange in air preheater 10, half, which enters, carries out heat exchange in fire grate water- to-water heat exchanger 6.When rubbish heat
When value increases, the heat needed for pre- heat primary air is reduced, and at this time adjusts allocation unit 12, is increased and is entered fire grate water- to-water heat exchanger 6
Flow, while reducing the flow for entering air preheater 10, improve the thermal energy profit of the recirculating cooling water system of water-cooled grate 1
With rate；When refuse thermal value reduces, the heat needed for pre- heat primary air increases, this is to adjust allocation unit 12, reduces and enters stove
The flow of heat exchanger 6 is drained, while increasing the flow for entering air preheater 4, increases the preheating temperature of First air, reduces system
The power consumption of system.
Illustratively, allocation unit 12 uses three-way control valve.
Technological process according to the waste incineration and generating electricity device of the present embodiment is：The recirculated cooling water of water-cooled grate 1 passes through
Circulating cooling water pump 11 is sent into water-cooled grate 1, and recirculated cooling water temperature rise after water-cooled grate 1 becomes high-temperature water.High temperature
Water is distributed by allocation unit 12, is passed through air preheater 10 all the way and is carried out heat exchange, after First air heat temperature raising, then becomes
Then water at low temperature returns in circulating cooling water pump 11；Another way carries out heat exchange by fire grate water- to-water heat exchanger 6, will condensation
The condensed water heating that water pump 5 comes out, the condensed water after heating are being removed after the heating of low-pressure heater 7 into oxygen-eliminating device 8
Oxygen enters boiler feed pump 9 later, and boiler feed pump 9, which is sent to after waste heat boiler 2 exchanges heat, to be changed into steam and enter steam turbine
3 workmanships are finished work(and are come out later from steam turbine 3, by condenser 4 from becoming condensed water；Heat is carried out by fire grate water- to-water heat exchanger 6
Recirculated cooling water after exchange becomes water at low temperature, returns in circulating cooling water pump 11.
Following for water-cooled grate can be adjusted according to the waste incineration and generating electricity device of the present embodiment according to the variation of refuse thermal value
Flow of the ring cooling water in condensation heating and air heat two branches, when refuse thermal value is relatively low, recirculated cooling water is inhaled
The heat of receipts is mainly used to heat air (such as First air), when refuse thermal value is relatively high, the heat of recirculated cooling water absorption
It is mainly used for heating condensate water, the cold mode of cycle of this water-cooled grate may be implemented flexibly to switch, be adjusted as desired and follow
The distribution for the heat that ring water absorbs, can reduce the consumption of system charge to the greatest extent under the premise of its heat is fully utilized.
Unless otherwise defined, those skilled in the art of technical and scientific term used herein and the present invention
Normally understood meaning is identical.Term used herein is intended merely to describe specifically to implement purpose, it is not intended that limitation is originally
Invention.Terms such as herein presented " settings " can both indicate that a component was attached directly to another component, also may be used
To indicate that a component is attached to another component by middleware.The feature described in one embodiment herein can be single
Solely or with other feature in combination be applied to another embodiment, unless this feature in another embodiment be not suitable for or
It is to be otherwise noted.
The present invention is illustrated by above-described embodiment, but it is to be understood that, above-described embodiment is only intended to
The purpose of citing and explanation, and be not intended to limit the invention within the scope of described embodiment.In addition people in the art
It is understood that the invention is not limited in above-described embodiment, introduction according to the present invention can also be made more kinds of member
Variants and modifications, these variants and modifications are all fallen within scope of the present invention.Protection scope of the present invention by
The appended claims and its equivalent scope are defined.
Claims (8)
1. a kind of cooling back installation of water-cooled grate, which is characterized in that including：
Fire grate cooling water pump, the fire grate cooling water pump is for recirculated cooling water to be pumped in the water-cooled grate, with to institute
It states water-cooled grate to be cooled down, recirculated cooling water temperature after the water-cooled grate increases；
Air preheater, the air preheater are used to heat air using the recirculated cooling water imported by the water-cooled grate,
After the recirculated cooling water completes heat exchange in the air preheater with air, temperature reduces and returns to the fire grate cooling water
In pump；
Fire grate water- to-water heat exchanger, the fire grate water- to-water heat exchanger are used to heat using the recirculated cooling water imported by the water-cooled grate cold
Condensate, after the recirculated cooling water completes heat exchange in the fire grate water- to-water heat exchanger with the condensed water, temperature is reduced and is returned to
In the fire grate cooling water pump；
Allocation unit, the allocation unit import the air preheater and the fire grate water for controlling by the water-cooled grate
The amount of recirculated cooling water in heat exchanger.
2. the cooling back installation of water-cooled grate according to claim 1, which is characterized in that the allocation unit includes three
Logical regulating valve.
3. a kind of waste incineration and generating electricity device, which is characterized in that including：
Waste incinerator is provided for the water-cooled grate of waste incineration in the waste incinerator；
Waste heat boiler, the waste heat boiler, which is used to be formed using the flue gas boiler feedwater generated in the waste incinerator, to be steamed
Vapour；
Steam turbine, the steam acting that the steam turbine is used to generate using the waste heat boiler drive electrical power generators；
Condenser, the condenser is used to condense the steam for completing acting in the steam turbine, so that the steam
It is changed into condensed water；
Fire grate cooling water pump, the fire grate cooling water pump is for recirculated cooling water to be pumped in the water-cooled grate, with to institute
It states water-cooled grate to be cooled down, recirculated cooling water temperature after the water-cooled grate increases；
Air preheater, the air preheater are used for using the recirculated cooling water heating supply imported by the water-cooled grate extremely
The air of the waste incinerator, to improve the temperature of air, the recirculated cooling water in the air preheater with air
After completing heat exchange, temperature is reduced and is returned in the fire grate cooling water pump；
Fire grate water- to-water heat exchanger, the fire grate water- to-water heat exchanger be used for using imported by the water-cooled grate recirculated cooling water heating come
From the condensed water of the condenser, to improve the temperature of the condensed water, the recirculated cooling water is in the fire grate water- to-water heat exchanger
In complete heat exchange with the condensed water after, temperature is reduced and is returned in the fire grate cooling water pump, described in condensed water process
It supplies into the waste heat boiler and is recycled as boiler feedwater after recirculated cooling water heating；
Allocation unit, the allocation unit import the air preheater and the fire grate water for controlling by the water-cooled grate
The amount of recirculated cooling water in heat exchanger.
4. waste incineration and generating electricity device according to claim 3, which is characterized in that the allocation unit includes that threeway is adjusted
Valve.
5. waste incineration and generating electricity device according to claim 3 or 4, which is characterized in that further include：
Condensate pump, the condensate pump are arranged between the condenser and the fire grate water- to-water heat exchanger, and being used for will be described cold
The condensed water generated in condenser is pumped in the fire grate water- to-water heat exchanger.
6. waste incineration and generating electricity device according to claim 3 or 4, which is characterized in that further include：
Low-pressure heater, the low-pressure heater is for heating the condensed water imported by the fire grate water- to-water heat exchanger, to form pot
Stove water supply.
7. waste incineration and generating electricity device according to claim 6, which is characterized in that further include：
Oxygen-eliminating device, the oxygen-eliminating device are used to remove gas contained in the boiler feedwater imported by the low-pressure heater.
8. waste incineration and generating electricity device according to claim 7, which is characterized in that further include：
Boiler feed pump, the boiler water pump are used to pump to the waste heat pot by the boiler feedwater of oxygen-eliminating device processing
In stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522837.0A CN108731004B (en) | 2018-05-28 | 2018-05-28 | Circulating cooling device of water-cooled grate and waste incineration power generation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522837.0A CN108731004B (en) | 2018-05-28 | 2018-05-28 | Circulating cooling device of water-cooled grate and waste incineration power generation device |
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| CN108731004A true CN108731004A (en) | 2018-11-02 |
| CN108731004B CN108731004B (en) | 2020-01-31 |
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| CN113464943A (en) * | 2021-06-01 | 2021-10-01 | 光大环保技术研究院（深圳）有限公司 | High-parameter thermodynamic system suitable for waste incineration and operation method thereof |
| CN113464943B (en) * | 2021-06-01 | 2023-11-14 | 光大环保技术研究院（深圳）有限公司 | High-parameter thermodynamic system suitable for garbage incineration and operation method thereof |
| CN113587116A (en) * | 2021-09-28 | 2021-11-02 | 光大环保技术装备（常州）有限公司 | Control method, control system and equipment for protection equipment in water-cooling circulation system |
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