CN203375457U - Garbage incineration boiler and air supplying system thereof - Google Patents
Garbage incineration boiler and air supplying system thereof Download PDFInfo
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- CN203375457U CN203375457U CN201320144621.8U CN201320144621U CN203375457U CN 203375457 U CN203375457 U CN 203375457U CN 201320144621 U CN201320144621 U CN 201320144621U CN 203375457 U CN203375457 U CN 203375457U
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model relates to a garbage incineration boiler and an air supplying system thereof. The air supplying system comprises a multi-step primary air supply unit. An inlet of a primary air fan of the multi-step primary air supply unit is provided with a cold air valve and a hot air valve. The cold air valve and the hot air valve are respectively connected to a cold air inlet and a hot air inlet. The garbage incineration boiler and the air supplying system thereof are advantageous in that the fifth-step primary air is changed into cold air, and thereby the load of an air pre-heater can be reduced, and the temperature of the former four-step primary air can be increased by 8-12 DEG C; the temperature of first-step, second-step and third-step fire grates can be increased by 30-70 DEG C; the ignition point of garbage is ahead of time and incineration can be continuous; the load fluctuation of the boiler is small, and the load is stable, and the load after garbage at the bottom (with high water content) or garbage at top (incomplete fermentation) are fed into the boiler will not be fluctuated; after the fifth-step primary air is changed into cold air, the burning flame of the hearth is forward, and the fifth step is used as a cooling step, and the efficiency of the boiler can be improved.
Description
Technical field
The utility model relates to waste incineration field, waste incineration and generating electricity field, and particularly, the utility model relates to a kind of garbage burning boiler and air feed system thereof, relates more specifically to the transformation of the primary air nozzle of garbage burning boiler.
Background technology
Waste incineration is to realize one of main path of garbage decrement, innoxious and recycling treatment.Waste incineration at present becomes the main path of urban garbage disposal gradually, rubbish is through modern burning disposal, and volume generally can reduce 80%-90%, can eliminate various pathogen simultaneously, harmful substance is converted into to harmless object, can also realizes the utilization of resource.
Existing waste incineration adopts the mechanical type garbage incinerator more, boiler for incinerator is divided into five sections to wind system (primary air system) at present, be respectively air to trash repository, send into burner hearth through one-level, secondary and three grades of air preheater heating by primary air fan, for oxygen-supplying amount is carried in waste incineration.
Because a wind in described boiler air feed system all needs by described one-level, secondary and three grades of air preheaters (air preheater) heating, thereby caused larger operating load to air preheater, make the temperature of a described wind lower, particularly in the winter time, a described air temperature is lower, simultaneously due to this in season rubbish water content high, thereby cause waste incineration incomplete, the load fluctuation of boiler is larger, and efficiency of combustion reduces, and the quality of slagging tap is affected.
Described problem not merely appears in incinerator, in coal-burning boiler or other solid fuel fired boilers, has equally described problem, causes boiler load unstable, and economic benefit is affected, and causes the secondary pollution to environment simultaneously.
Therefore, need to the air feed system of current boiler combustion be improved, to stablize the load of boiler, improved efficiency of combustion and deslagging quality.
The utility model content
Introduced the concept of a series of reduced forms in the utility model content part, this will further describe in specific embodiment part.Key feature and essential features that utility model content part of the present utility model not meaning that will attempt to limit technical scheme required for protection more do not mean that the protection domain of attempting to determine technical scheme required for protection.
The utility model provides a kind of air feed system of garbage burning boiler, described air feed system comprises wind feeding unit of multistage, in wind feeding unit of described multistage, the porch of primary air fan is provided with cold wind valve and Hot-blast valve, and with Hot-blast valve, with the cold wind import, with hot blast, import is connected described cold wind valve respectively.
As preferably, described cold wind valve is connected with the import of main building cold wind.
As preferably, described air feed system also comprises air preheater.
As preferably, the air outlet slit of described air preheater is connected with described hot blast import.
As preferably, described primary air fan porch is provided with three-way valve, and described three-way valve is connected with described cold wind valve and Hot-blast valve.
As preferably, in wind feeding unit of described multistage only wind feeding unit of latter end be provided with cold wind valve and Hot-blast valve.
As preferably, the number of described air preheater is 3, and described 3 air preheaters series connection arranges.
As preferably, described air feed system comprises five sections wind feeding units.
As preferably, described air feed system comprises wind feeding unit of two groups of described multistages, the corresponding both sides that are arranged at garbage burning boiler.
The utility model also provides a kind of garbage burning boiler, and described garbage burning boiler is wrapped a kind of in the air feed system of stating garbage burning boiler.
The utility model has the advantage of:
1. five sections wind change the cold wind operation into, can reduce the air preheater operating load, and front four sections wind-warm syndrome improve 8-12 ℃ of left and right.
2. one, two, three section fire grate temperature improves 30-70 ℃, and the rubbish ignition point in advance, burns continuously, and the boiler load fluctuation is little, and after steady load, particularly trash repository bottom rubbish (water content is high) or top rubbish (fermentation not exclusively) enter stove, load does not fluctuate yet.
3. after five sections wind change cold wind into, hearth combustion flame is forward, and five sections as cooling section, and boiler efficiency improves.Reduce nearly 1 percentage point of hot burn decrement rate, slag amount also descends 2 percentage points, reduces freight.
4. work as rubbish and exist first four sections to fire situation not to the utmost, five sections wind inlets are switched to the hot blast mode and move, guarantee the quality of slagging tap.
5. ton garbage power amount is increased to 401.04 KWh/tons, has improved unit efficiency.
The accompanying drawing explanation
Following accompanying drawing of the present utility model is used for understanding the utility model in this as a part of the present utility model.Shown in the drawings of embodiment of the present utility model and description thereof, be used for explaining principle of the present utility model.In the accompanying drawings,
Fig. 1 shows the structure chart according to the air feed system of the utility model garbage burning boiler.
The specific embodiment
In the following description, having provided a large amount of concrete details understands the utility model more thoroughly in order to provide.Yet, it will be apparent to one skilled in the art that the utility model can be implemented without one or more these details.In other example, for fear of obscuring with the utility model, for technical characterictics more well known in the art, be not described.
Below by embodiment also by reference to the accompanying drawings, the technical solution of the utility model is illustrated.
In order to solve the rational not problem of the wind supply existed in prior art, the utility model provides a kind of new air feed system, realize that the technical scheme that the utility model purpose is taked is: in wind feeding unit of multistage, the primary air fan entrance is installed first cooling by wind air valve and Hot-blast valve, according to fire box temperature and burning situation switch first cooling by wind air valve and Hot-blast valve.
Particularly, wind feeding unit of described multistage, wind feeding unit of wherein said multistage is communicated with the burner hearth of burning boiler through primary air fan, for to burner hearth, passing into wind one time, with boiler of feeding, burnt, in order to reduce the load of boiler combustion, be provided with first cooling by wind air valve and a wind-heat air valve that can be switched in a described wind porch, described first cooling by wind air valve is connected with the cold wind import, a described wind-heat air valve is connected with the hot blast import, so that according to fire box temperature and the situation of burning switch first cooling by wind Hot-blast valve, carry out the switching of cold wind and hot blast.
As preferably, described cold wind valve is connected with the import of described main building cold wind.
As preferably, in the utility model in order to increase economic efficiency, and the burn-off rate of fuel in boiler, all be provided with air preheater in boiler plant, by air preheater, fuel and combustion adjuvant are heated, reclaim the high-temperature flue gas energy, the energy that is air by the power conversion of high-temperature gas in heat exchanger, the heating of realization to a wind, described air preheater comprises exhaust gases passes and the wind passage separated by heat conduction baffle, pass through flue gas in heat conduction baffle one side exhaust gases passes, a wind passage of opposite side passes through air, carry out Re Jiaore, a wind is heated, improve temperature, the flue gas exhaust gas temperature is descended, improve the degree of utilizing of fume afterheat.
As preferably, the air outlet slit of described air preheater is connected with described hot blast import, by air preheater, to described hot blast import, passes into wind-heat wind one time.
Particularly, as preferably, wind feeding unit of two groups of described multistages is set in the described boiler left and right sides, wind feeding unit of described two groups of multistages is oppositely arranged and the boiler both sides, wind feeding unit of every group of multistage comprises five sections wind feeding units, wherein at wind feeding unit of described latter end, in the 5th section wind feeding unit, the primary air fan porch arranges three-way valve, two outlets of described three-way valve are respectively arranged with cold wind valve and Hot-blast valve, described cold wind valve is connected with the import of described main building cold wind, described Hot-blast valve is connected with described air preheater through the hot blast import, for the hot blast that passes into natural wind or carry out heat exchange through air preheater to described burner hearth.
The number that it should be noted that a wind feeding unit in a wind supply system described in the utility model is not limited to five sections, size according to the boiler scale, the water content of fuel (for example rubbish), and the requirement of rubbish ash-retention efficiency is selected described air feed system, can increase or reduce the number of a described wind feeding unit, but can be by wind feeding unit of latter end, the cold-hot wind valve being set, can be chosen in the temperature that latter end passes into a wind, to reduce the load of boiler combustion and air preheater, improve efficiency of combustion and economic benefit.
It should be noted that, the structure of described air preheater and model are not limited to a certain, as long as can realize that the air preheater of above-mentioned purpose all can be applied to the utility model, as preferably, in order to improve the utilization rate of flue gas, reduce the load of air preheater, number at air preheater described in the utility model is 3, described 3 air preheaters can be thought series connection setting, along the air traffic direction, are respectively the first air preheater, the second air preheater and the 3rd air preheater.
As preferably, described air preheater is two groups, is arranged at respectively the both sides of burner hearth, corresponding with described two groups of wind feeding units.
As preferably, in order to reduce the load of described air preheater, except described air preheater can be used for adding the heat primary air wind-warm syndrome, can further include the furnace wall cooling blower in described air feed system, described furnace wall cooling blower when cooling furnace wall by heat exchange, complete the heating to a wind, an end of described furnace wall cooling blower is connected with an airduct in five sections wind feeding units, for to burner hearth, supplying a wind.
As preferably, described furnace wall cooling blower be two groups respectively with described two groups of corresponding settings of wind feeding mechanism.The structure of described furnace wall cooling blower can be selected structure commonly used in this area, is not limited to a certain.
A kind of concrete embodiment also is provided in the utility model, as described in Figure 1, described air feed system comprises two groups of wind feeding units in this embodiment, be arranged at the boiler furnace left and right sides, be respectively left air feed unit and right air feed unit, its left air feed unit comprises left the first air preheater, left the second air preheater, left the 3rd air preheater, described left the first air preheater, left the second air preheater, left the 3rd air preheater by airduct respectively with wind feeding unit of described left first paragraph (referred to as the first from left unit), wind feeding unit of described left second segment (referred to as the second from left unit), described left the 3rd section wind feeding unit (referred to as left Unit three), described left the 4th section wind feeding unit (referred to as left Unit four), described left the 5th section wind feeding unit (referred to as left Unit five) is connected, equal one more blower fan in each wind feeding unit, be arranged between air preheater and burner hearth, in wherein said left Unit five, a wind porch of primary air fan 5 is provided with three-way valve, described three-way valve and left May Day time wind-heat air valve 1, left May Day, time air-cooled air valve 2 was communicated with, for in described left Unit five, realizing cold wind, the switching of hot blast feeding.
Accordingly, its right air feed unit comprises right the first air preheater, right the second air preheater, right the 3rd air preheater, described left the first air preheater, left the second air preheater, right the 3rd air preheater by airduct respectively with wind feeding unit of described right first paragraph (referred to as a right unit), wind feeding unit of described right second segment (referred to as right Unit two), described right the 3rd section wind feeding unit (referred to as right Unit three), described right the 4th section wind feeding unit (referred to as right Unit four), described right the 5th section wind feeding unit (referred to as right Unit five) is connected, equal one more blower fan in each wind feeding unit wherein, be arranged between air preheater and burner hearth, in described left Unit five, a wind porch of primary air fan 5 is provided with three-way valve, described three-way valve and right May Day time wind-heat air valve 3, right May Day, time air-cooled air valve 4 was communicated with, for in described right Unit five, realizing cold wind, the switching of hot blast feeding.
In the utility model, the operation principle of air feed system is:
Air at the trash repository top enters and enters respectively left the first air preheater, left the second air preheater, left the 3rd air preheater, air duct, in described left air preheater, heat exchange occurs, one time air temperature rises, accordingly in left side, a wind after heating is through the first from left unit, the second from left unit, left Unit three, left Unit four, left Unit five enter burner hearth, correspondingly, a wind after the heating of right side is through a right unit, right Unit two, right Unit three, right Unit four, right Unit five enter burner hearth, to a wind of burner hearth supply, between burning, air is also supplied a wind by left and right sides air feed system to described burner hearth respectively through described furnace wall cooling blower simultaneously.
Described left five ,You Wu unit, unit left May Day time air-cooled air valves 2 and right May Day time air-cooled air valve 4 in open mode, pass into cold wind, now, can reduce the air preheater operating load, front four sections wind-warm syndrome improve 8-12 ℃ of left and right, first to three section fire grate temperature improves 30-70 ℃, and the rubbish ignition point in advance, burns continuously, the boiler load fluctuation is little, after steady load, particularly trash repository bottom rubbish (water content is high) or top rubbish (fermentation not exclusively) enter stove, load does not fluctuate yet; Now hearth combustion flame is forward, and the 5th section row is as cooling section, and boiler efficiency improves, and reduces nearly 1 percentage point of hot burn decrement rate, and slag amount also descends 2 percentage points, reduces freight, as shown in table 1.Be increased to 401.04 KWh/tons by improving rear ton garbage power amount, improved unit efficiency.When there are first four sections while firing not to the utmost situation in rubbish, described left five ,You Wu unit, unit time wind-heat air valves 1 on left May Day and right May Day time wind-heat air valve 3 in open mode, pass into hot blast, right Unit five are switched to the hot blast mode and move, guarantee the quality of slagging tap.
Table 1 adopts wind-warm syndrome, hot burn decrement rate and a slag rate table of comparisons after new air feed system
In above table, 1-7 month is a wind-warm syndrome, hot burn decrement rate and the slag rate while selecting air feed system in prior art, 8-9 month is the related data of selecting after air feed system of the present utility model, as can be seen from the table, after air feed system after selecting improvement, a wind-warm syndrome is significantly improved, from 162-174 ℃, bring up to 185-187 ℃; Hot burn decrement rate drops to 2% from 3% left and right, and the slag rate drops to 22.85-24.81% from 25.06-28.44%, has very significantly and reduces, and illustrates that the incineration firing effect is improved significantly, has guaranteed the quality of slagging tap, and has obtained very significantly effect.
The utility model is illustrated by above-described embodiment, but should be understood that, above-described embodiment is the purpose for giving an example and illustrating just, but not is intended to the utility model is limited in described scope of embodiments.It will be understood by those skilled in the art that in addition; the utility model is not limited to above-described embodiment; can also make more kinds of variants and modifications according to instruction of the present utility model, these variants and modifications all drop in the utility model scope required for protection.Protection domain of the present utility model is defined by the appended claims and equivalent scope thereof.
Claims (10)
1. the air feed system of a garbage burning boiler, described air feed system comprises wind feeding unit of multistage, it is characterized in that, in wind feeding unit of described multistage, the porch of primary air fan is provided with cold wind valve and Hot-blast valve, and with Hot-blast valve, with the cold wind import, with hot blast, import is connected described cold wind valve respectively.
2. air feed system according to claim 1, is characterized in that, described cold wind valve is connected with the import of main building cold wind.
3. air feed system according to claim 1, is characterized in that, described air feed system also comprises air preheater.
4. air feed system according to claim 3, is characterized in that, the air outlet slit of described air preheater is connected with described hot blast import.
5. air feed system according to claim 1, is characterized in that, described primary air fan porch is provided with three-way valve, and described three-way valve is connected with described cold wind valve and Hot-blast valve.
6. air feed system according to claim 1, is characterized in that, in wind feeding unit of described multistage only wind feeding unit of latter end be provided with cold wind valve and Hot-blast valve.
7. air feed system according to claim 3, is characterized in that, the number of described air preheater is 3, and described 3 air preheaters series connection arranges.
8. air feed system according to claim 1, is characterized in that, described air feed system comprises five sections wind feeding units.
9. according to the described air feed system of claim 1 or 8, it is characterized in that, described air feed system comprises wind feeding unit of two groups of described multistages, the corresponding both sides that are arranged at garbage burning boiler.
10. a garbage burning boiler, is characterized in that, the air feed system that comprises the described garbage burning boiler of one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320144621.8U CN203375457U (en) | 2013-03-27 | 2013-03-27 | Garbage incineration boiler and air supplying system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320144621.8U CN203375457U (en) | 2013-03-27 | 2013-03-27 | Garbage incineration boiler and air supplying system thereof |
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| CN203375457U true CN203375457U (en) | 2014-01-01 |
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| CN201320144621.8U Expired - Lifetime CN203375457U (en) | 2013-03-27 | 2013-03-27 | Garbage incineration boiler and air supplying system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285422A (en) * | 2019-07-09 | 2019-09-27 | 象山泛海环保科技有限责任公司 | A kind of refuse disposal installation of controllable temperature |
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2013
- 2013-03-27 CN CN201320144621.8U patent/CN203375457U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285422A (en) * | 2019-07-09 | 2019-09-27 | 象山泛海环保科技有限责任公司 | A kind of refuse disposal installation of controllable temperature |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |
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| CX01 | Expiry of patent term |