CN207680335U - A kind of waste incinerator flue denitrating system - Google Patents
A kind of waste incinerator flue denitrating system Download PDFInfo
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- CN207680335U CN207680335U CN201721588892.7U CN201721588892U CN207680335U CN 207680335 U CN207680335 U CN 207680335U CN 201721588892 U CN201721588892 U CN 201721588892U CN 207680335 U CN207680335 U CN 207680335U
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- flue
- spray gun
- input port
- compressed gas
- waste incinerator
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Abstract
The utility model discloses a kind of waste incinerator flue denitrating systems, including waste incinerator, the flue gas of waste incinerator is through flue whereabouts waste heat boiler, the flue is divided into the first flue, the second flue and third flue, first flue is the flue that section is rectangle, at least three row's spray guns are respectively set on three side walls of the rectangular flue, wherein：Neighbouring two rows of spray guns in two opposing sidewalls in spray gun are staggered, with opposing sidewalls alignment is arranged vertically adjacent to the spray gun on side wall up and down, the compressed gas source includes compressor and voltage stabilizing air accumulator, and the voltage stabilizing air accumulator is connected to the compressed gas input port of spray gun by a pressure reducing valve.It is low that the utility model solves nozzle service life, and rational nozzle layout eliminates injection dead zone, improves denitration efficiency 10% 15%, not only ensure that DS NOx Est reaches 2010 standard of European Union, and delayed the service life of equipment, reduce equipment failure rate and maintenance frequency, improves denitration efficiency.
Description
Technical field
The utility model is related to a kind of waste incinerator flue denitrating systems.
Background technology
SNCR denitration technology has been widely used in garbage incinerating power plant at present, is diluted in flue by spraying
Ammoniacal liquor realize denitration, reduce the discharge of nitrogen oxides, but with people's standard higher and higher to surrounding air, and face
Increasingly severeer Environmental Protection Situation, higher for the degree of purification requirement of garbage incinerating power plant flue gas emission, local government exists
To requiring nitrogen oxide emission to be less than 200mg/m in garbage incinerating power plant project environmental impact assessment3Or even some districts and cities require nitrogen
Oxide uses minimum discharge standard, discharge capacity to be less than or equal to 100mg/m3.Can also it go out sometimes in current garbage incinerating power plant
Existing denitrating flue gas is unstable, and nozzle life is short, and corrosion is washed away seriously, so as to cause the low problem of denitration efficiency.Therefore, it is necessary to adopt
Take stringenter technical measures, in the flue gas emission of garbage incinerating power plant ensure denitration stabilization and efficiently.
Invention content
The purpose of this utility model is to propose a kind of waste incinerator flue denitrating system, passes through the pipe conveyed in reducing agent
Increase voltage stabilizing air accumulator in road, and the nozzle of stainless steel is replaced with into the technical measures such as silicon nitride ceramics nozzle, improves cigarette
Qi exhaustion nitre stability, extends the service life of nozzle, ensure denitrating flue gas stabilization and efficiently.
To achieve the goals above, the technical solution of the utility model is：
A kind of waste incinerator flue denitrating system, including waste incinerator, the flue gas of waste incinerator is through flue whereabouts
Waste heat boiler, the flue are divided into three-level, and respectively the first flue, the second flue and third flue, flue gas sequence is through the first cigarette
Road, the second flue and third flue enter waste heat boiler, between second flue and third flue by setting it is vertical to
Under water-cooled wall partition wall separate, first flue be section be rectangle flue, in the side wall upper edge cigarette of rectangular flue
The flue gas trend in road is provided with multiple rows of spray gun for denitration, and spray gun has reducing agent input port and compressed gas input port, reducing agent
Input port connects reducing agent input source, and compressed gas input port is connected with compressed gas source, and the compression inputted from compressed gas input port is empty
Gas sprays the reducing agent inputted from reducing agent input port in spray gun from the nozzle of spray gun after mixed aerosol；In the rectangle cigarette
At least three row's spray guns are respectively set on three side walls in road, wherein：Neighbouring two rows of sprays in two opposing sidewalls in spray gun
Rifle is staggered, and arranges alignment up and down vertically adjacent to the spray gun on side wall with opposing sidewalls, the compressed gas source includes compression
Machine and voltage stabilizing air accumulator, the voltage stabilizing air accumulator are connected to the compressed gas input port of spray gun, voltage stabilizing gas storage by a pressure reducing valve
The gas storage pressure of tank is at least 1.5 times of spray gun compressed gas input port air pressure.
Scheme is further：The reducing agent input source includes：The urea liquid preparation tank that is linked in sequence, urea liquid storage
It deposits tank, urea liquid supply unit, metering mixed cell and a dilution soft water storage tank and soft water supply unit, soft water is defeated
Unit connection metering mixed cell, metering mixed cell is sent to inject spray gun reducing agent by mixed reducing agent is measured by metering pump
Input port.
Scheme is further：The nozzle of the spray gun is silicon nitride ceramics nozzle, and the spray angle of nozzle is 120 degree of level
Angle.
Scheme is further：The admission pressure of the compressed gas input port of the spray gun is 0.5Mpa.
The utility model has the beneficial effects that：
It is low to solve nozzle service life, rational nozzle layout eliminates injection dead zone and carried under same conditions of mixture ratios
High denitration efficiency 10%-15%, not only ensures that DS NOx Est reaches 2010 standard of European Union, but also delayed the service life of equipment, reduces
Equipment failure rate and maintenance frequency, improve denitration efficiency.The silicon nitride ceramics nozzle that this denitration in the stove uses can be
Domestic garbage burning electricity generation is widelyd popularize, and the low big output of input has ensured burning power plant monolithic stability, safe and environment-friendly fortune
Row.
The utility model is described in detail with reference to the accompanying drawings and examples.
Description of the drawings
Fig. 1 is the utility model structure section schematic diagram；
Fig. 2 is the utility model reducing agent input source connection relation structural schematic diagram.
Specific implementation mode
A kind of waste incinerator flue denitrating system is the flue denitrating system for the application of waste incinerator waste heat, such as
Shown in Fig. 1 and Fig. 2, including waste incinerator 1, through flue whereabouts waste heat boiler, the flue is divided into the flue gas of waste incinerator
Three-level, respectively the first flue 2, the second flue 3 and third flue 4, flue gas sequence is through the first flue, the second flue and third cigarette
Road enters waste heat boiler, passes through the water-cooled wall partition wall 5 vertically downward of setting between second flue and third flue
It separates, collection ash of the water-cooled wall partition wall for flue gas collects the ash collection slot 6 that the ash falls into following settings, flue gas is in the first cigarette
Road carries out denitration, and therefore, first flue is the flue that section is rectangle, i.e. square flue, on the side wall of rectangular flue
Flue gas trend along flue is provided with multiple rows of spray gun 7 for denitration, and spray gun structure is the prior art, and spray gun has reducing agent input
Mouth and compressed gas input port, reducing agent input port connect reducing agent input source, and compressed gas input port is connected with compressed gas source, from pressure
Contracting gas input port input compressed air by the reducing agent inputted from reducing agent input port in spray gun after mixed aerosol from spray gun
Nozzle spray；Wherein, in order to improve, only there are denitration effects to pay no attention to for setting spray gun on two adjacent walls in the prior art
At least three row's spray guns are respectively set in the present situation thought, the present embodiment on three side walls of the rectangular flue, in order to overcome injection
Dead angle, wherein：Neighbouring two rows of spray guns in two opposing sidewalls in spray gun are staggered, with opposing sidewalls vertically adjacent to side
Spray gun on wall arranges alignment up and down, and distance between row and row is at 1.5 to 2.5 meters；Also, the compressed gas source includes pressure
Contracting machine 8 and voltage stabilizing air accumulator 9, the voltage stabilizing air accumulator are connected to the compressed gas input port of spray gun by a pressure reducing valve 10, surely
The gas storage pressure of pressure air accumulator is at least 1.5 times of spray gun compressed gas input port air pressure.
In embodiment：As shown in Fig. 2, the reducing agent input source includes：The urea liquid preparation tank 11 that is linked in sequence, urine
Plain solution storage tanks 12, urea liquid supply unit 13, metering mixed cell 14 and a dilution soft water storage tank 15 and soft water
Supply unit 16, soft water supply unit connect metering mixed cell, metering mixed cell going back metering mixing by metering pump
Former agent injection spray gun reducing agent input port.
Denitration nozzle is chronically in hot environment, and sour corrosion is than more serious, the nozzle of general 316L materials, at most
As soon as operation year or so is just corroded and washes away very serious, nozzle reduces once being corroded and washing away atomizing effect, and droplet dew phenomenon is tight
Weight reduces so as to cause denitration efficiency.For this purpose, in the present embodiment：The nozzle of the spray gun is silicon nitride ceramics nozzle, nitridation
The main constituent of silicon ceramics is Si3N4, this is a kind of elevated temperature strength height, high rigidity, wear-resisting, corrosion-resistant and energy self-lubricating high temperature
Ceramics, linear expansion coefficient is minimum in various ceramics, and temperature in use is up to 1400 DEG C, has fabulous corrosion resistance, dehydrogenation fluorine
It is sour outer, the corrosion of various other acid, and alkaline-resisting, the various corrosions of metal of energy are resistant to, and there is excellent electrical insulating property and resistance to spoke
Penetrating property.The spray angle of nozzle is 120 degree of angles of level.
In embodiment：The admission pressure of the compressed gas input port of the spray gun is 0.5Mpa.Two Fluid sprayers selected,
NH3 water atomizations are atomized using compressed air, and NH3 water mists are melted into the thin of 50 microns of average diameter or more by the compressed air of 0.5Mpa
Mist produces N2 and H2O by NH3 and reaction of nitrogen oxides.It is best that compressed air is maintained at 0.5Mpa atomizing effects, but general electricity
Factory's air branching ratio is more, and the compressed air pressure of same pipeline fluctuates larger, compressed air pressure influence of fluctuations atomizing effect,
If uniformly mixing, denitration efficiency can be substantially reduced for flue gas and the reaction of NH3 water.Therefore, using in compressed air in embodiment
Increase compressed air vacuum tank before air inlet, ensure that compressed air pressure maintains 0.5Mpa or so, ensure nebulization efficiency, improves de-
Nitre efficiency.
It is low that the present embodiment solves nozzle service life, improves denitration efficiency 10%-15%, the nitrogen for making waste incineration generate
What oxide was stablized maintains 200mg/m per hour3。
Claims (4)
1. a kind of waste incinerator flue denitrating system, including waste incinerator, the flue gas of waste incinerator is through more than flue whereabouts
Heat boiler, the flue are divided into three-level, respectively the first flue, the second flue and third flue, flue gas sequence through the first flue,
Second flue and third flue enter waste heat boiler, between second flue and third flue by setting vertically downward
Water-cooled wall partition wall separates, and first flue is the flue that section is rectangle, in the side wall upper edge flue of rectangular flue
Flue gas trend is provided with multiple rows of spray gun for denitration, and spray gun has reducing agent input port and compressed gas input port, reducing agent input
Mouth connection reducing agent input source, compressed gas input port are connected with compressed gas source, and the compressed air inputted from compressed gas input port will
The reducing agent inputted from reducing agent input port sprays after mixed aerosol from the nozzle of spray gun in spray gun；It is characterized in that, institute
It states and at least three row's spray guns is respectively set on three side walls of rectangular flue, wherein：Phase up and down in two opposing sidewalls in spray gun
Adjacent two rows spray gun is staggered, and alignment, the compressed gas source are arranged up and down vertically adjacent to the spray gun on side wall with opposing sidewalls
Including compressor and voltage stabilizing air accumulator, the voltage stabilizing air accumulator is connected to the compressed gas input port of spray gun by a pressure reducing valve,
The gas storage pressure of voltage stabilizing air accumulator is at least 1.5 times of spray gun compressed gas input port air pressure.
2. waste incinerator flue denitrating system according to claim 1, which is characterized in that the reducing agent input source packet
It includes：The urea liquid preparation tank that is linked in sequence, urea liquid holding vessel, urea liquid supply unit, metering mixed cell, and
One dilution soft water storage tank and soft water supply unit, soft water supply unit connection metering mixed cell, metering mixed cell pass through
Metering pump will measure mixed reducing agent injection spray gun reducing agent input port.
3. waste incinerator flue denitrating system according to claim 1, which is characterized in that the nozzle of the spray gun is nitrogen
The spray angle of SiClx ceramic nozzle, nozzle is 120 degree of angles of level.
4. waste incinerator flue denitrating system according to claim 1, which is characterized in that the compressed gas of the spray gun is defeated
The admission pressure of entrance is 0.5Mpa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721588892.7U CN207680335U (en) | 2017-11-24 | 2017-11-24 | A kind of waste incinerator flue denitrating system |
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| CN201721588892.7U CN207680335U (en) | 2017-11-24 | 2017-11-24 | A kind of waste incinerator flue denitrating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539264A (en) * | 2018-12-21 | 2019-03-29 | 北京高安屯垃圾焚烧有限公司 | Garbage incinerating system and garbage incineration method |
| CN112240556A (en) * | 2020-10-20 | 2021-01-19 | 江苏天楹等离子体科技有限公司 | Flue gas waste heat utilization device of garbage incinerator |
-
2017
- 2017-11-24 CN CN201721588892.7U patent/CN207680335U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539264A (en) * | 2018-12-21 | 2019-03-29 | 北京高安屯垃圾焚烧有限公司 | Garbage incinerating system and garbage incineration method |
| CN109539264B (en) * | 2018-12-21 | 2024-04-05 | 北京高安屯垃圾焚烧有限公司 | Garbage incineration equipment and garbage incineration method |
| CN112240556A (en) * | 2020-10-20 | 2021-01-19 | 江苏天楹等离子体科技有限公司 | Flue gas waste heat utilization device of garbage incinerator |
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