CN109595568A - High-purity is given up ammonia incinerator, system and technique - Google Patents
High-purity is given up ammonia incinerator, system and technique Download PDFInfo
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- CN109595568A CN109595568A CN201811507439.8A CN201811507439A CN109595568A CN 109595568 A CN109595568 A CN 109595568A CN 201811507439 A CN201811507439 A CN 201811507439A CN 109595568 A CN109595568 A CN 109595568A
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- ammonia
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
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- 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
- F23G5/442—Waste feed arrangements
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- 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
- F23G5/50—Control or safety arrangements
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- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Incineration Of Waste (AREA)
Abstract
The present invention discloses a kind of useless ammonia incineration system of high-purity, it gives up ammonia incinerator, burner, ammonia pipeline, combustion air pipeline, fuel conduit, heat-exchanger rig, smoke exhaust fan and control device including high-purity, wherein, the useless ammonia incinerator of high-purity includes furnace body, the first air inlet distribution apparatus, the second air inlet distribution apparatus and firebreak；First air inlet distribution apparatus is connect by wind-supplying mouth with combustion air pipeline by ammonia pipe joint and ammonia piping connection, the second air inlet distribution apparatus；When fuel generates flame in burner hearth by the flame burner nozzle of burner, the ammonia of introducing is distributed in flame outer rim full combustion by the first air inlet distribution apparatus, is axially sprayed the combustion air of introducing to form gas wall in flame periphery by the second air inlet distribution apparatus.Further, the useless ammonia incinerator of corresponding high-purity and burning process are also disclosed.Through the invention can in heating power burning process, make high-purity give up ammonia completely burned while, moreover it is possible to control the generation of nitrogen oxides.
Description
Technical field
The invention belongs to burning facility field, in particular to a kind of ammonia treatment that can be used in high-purity ammon production process giving up is burnt
Burn furnace, system and technique.
Background technique
High-purity ammon is a kind of important Elementary Chemical Industry material, it is widely used in the works such as electronics, chemical industry, metallurgy, the energy
In research and production in terms of industry.Electronic grade high-purity ammonia purity requirement reaches 99.9999% (volume fraction).
High-purity ammon in process of production, not exclusively due to impurity separation, leads to 99.9% (volume fraction) of higher degree
Useless ammonia generate.It since ammonia is pernicious gas, not directly discharges, needs that it handle and then discharge again.Currently, logical
The processing mode often taken mainly has: 1) this strand of gas being drained into absorption tower and be only absorbed by the water, be processed into ammonium hydroxide, but due to its work
Skill is complicated, and equipment input cost is higher, ammonium hydroxide it is cheap etc., therefore recovery value is not high；2) incineration method is used, so that
Ammonia completely burned becomes harmless N2And H2Then O is discharged, but the burning point of ammonia is 651 DEG C, and ignition temperature is low, and ammonia burning is endless
Entirely, ignition temperature is excessively high, and excessive nitrogen oxides can be generated in combustion process.Therefore, how to control furnace temperature arranges nitrogen oxides
It puts not exceeded while ammonia being made to decompose an also always problem completely.
207422241 U of Chinese patent CN proposes a kind of ammonia-contaminated gas incinerator, but it is only applicable to containing a small amount of ammonia
Burned waste gas, the ammonia for not being suitable for purity is high burns, and fire box temperature is up to 1000~1300 DEG C, and needs big by incorporation
Amount air makes its exhaust gas temperature be down to 250 DEG C, this will bring very big energy waste, and reduce tail simply by Dilution air
The concentration of the nitrogen oxides of gas, nitrogen oxides excessive problem are not also solved at all in fact.
Summary of the invention
To solve the above problems, the present invention disclose a kind of profession for the incinerator of high-purity ammon gas disposal, incineration system and
Technique can keep high-purity useless in heating power burning process by giving up the improvement of ammonia and combustion air intake method to high-purity
While ammonia completely burned, moreover it is possible to control the generation of nitrogen oxides.
The technical scheme is that
Scheme one: a kind of useless ammonia incinerator of high-purity including furnace body, the combustor interface being arranged on furnace body, mends wind
Mouth, ammonia pipe joint and exhanst gas outlet are arranged in the intracorporal first air inlet distribution apparatus of furnace, the second air inlet distribution apparatus and gear
Wall with flues, and the temperature-detecting device for detecting furnace body temperature and the differential pressure measuring device for detecting pressure in furnace body；
First air inlet distribution apparatus is passed through wind-supplying mouth and is helped by ammonia pipe joint and ammonia piping connection, the second air inlet distribution apparatus
Fire air pipe line connection；When the flame burner nozzle for accessing burner generates flame in burner hearth, it is distributed and is filled by the first air inlet
It sets and the ammonia that ammonia pipeline introduces is distributed in flame outer rim full combustion, by the second air inlet distribution apparatus by combustion-aid air pipe
The combustion air that pass enters axially is sprayed to form gas wall in flame periphery.
Preferably, the first air inlet distribution apparatus include a main header being connect with ammonia pipe joint and with it is total
Gas collecting tube connection and the multiple ammonia distribution units circumferentially distributed along inboard wall of furnace body；The ammonia distribution unit includes a Zhi Jiqi
Pipe and multiple ammonia injection pipes for connect with branch gas collecting tube, the injection direction face flame and end line of each ammonia injection pipe and
The outer edge contour line of its corresponding flame axial direction matches.Here identical is mainly shown as that shape is similar, and length is suitable.
Preferably, the second air inlet distribution apparatus is constructed hollow form structure, and with one connect with wind-supplying mouth into
Port and multiple circumferentially distributed combustion air spray-holes.
Preferably, the second air inlet distribution apparatus also has a central through hole for being used to wear flame burner nozzle, described to help
Combustion air jet hole is circumferentially uniformly distributed centered on the central through hole.
Scheme two: a kind of high-purity is given up ammonia incineration system, which is characterized in that including burner, ammonia pipeline, combustion-supporting
The useless ammonia of high-purity described in air pipe line, fuel conduit, heat-exchanger rig, smoke exhaust fan, control device and scheme one burns
Furnace；The flame burner nozzle of the burner is altar lamp, and is connect with the combustor interface of the useless ammonia incinerator of the high-purity；
The connection of the feed inlet of the fuel conduit and burner；It is useless that the hot-side channel import of the heat-exchanger rig connects the high-purity
The exhanst gas outlet of ammonia incinerator, hot-side channel outlet connection smoke exhaust fan, the external cold medium of cold side channel；The ammonia pipeline
Configured with the first air intake control valve；The combustion air pipeline is configured with benefit wind blower and the second air intake control valve；The fuel
Pipeline flowing has third air intake control valve；The control device is to benefit wind blower, smoke exhaust fan, the second air intake control valve and differential pressure
Detection device interlocked control is adjusted with realizing that the useless ammonia of high-purity burns furnace pressure；The control device is to the first air inlet control
Valve processed, the second air intake control valve, third air intake control valve, temperature-detecting device interlocked control are given up ammonia incinerator with high-purity
Interior temperature is adjusted.
Preferably, the heat-exchanger rig is finned tube exchanger.
Preferably, the smoke exhaust fan and benefit wind blower are frequency control.
Scheme three: a kind of high-purity is given up ammonia burning process, is given up ammonia incineration system based on high-purity described in scheme two,
The following steps are included:
It opens the second air intake control valve door, benefit wind blower, smoke exhaust fan and is passed through air into burner hearth, inside is blown
It sweeps, accumulates ammonia in burner hearth to remove；
By to mend wind blower, smoke exhaust fan, the second air intake control valve door, differential pressure measuring device interlocked control, to two
The air quantity for mending wind blower and smoke exhaust fan is adjusted, and maintains negative pressure operation in burner hearth；
Burner is opened, third air intake control valve door is opened and is passed through fuel and lights a fire, in freeze profile at flame, burner hearth
Interior constant temperature increases, the temperature of observation temperature-detecting device monitoring, when temperature reaches 500 DEG C in burner hearth, heat-exchanger rig
Start to be passed through cold medium in cold side channel；
The temperature for observing temperature-detecting device monitoring opens the first air intake control valve when temperature reaches 800 DEG C in burner hearth
Door is passed through the useless ammonia of high-purity, and the useless ammonia of high-purity is distributed in flame outer rim and full combustion by the first air inlet distribution apparatus；
It is adjusted by the second air intake control valve door and mends wind air quantity, combustion air is injected in fire by the second air inlet distribution apparatus
Flame periphery forms gas wall, is ammonia burning oxygenating, and be limited in localized high temperature regions within gas wall；
By control device to the first air intake control valve door, the second air intake control valve door, third air intake control valve door and temperature
Detection device interlocked control is spent, maintains 950 DEG C ± 30 DEG C of fire box temperature；
In combustion process, the ammonia not decomposed completely is sufficiently decomposed through firebreak；
High-temperature flue gas after decomposition enters the hot-side channel of heat-exchanger rig through exhanst gas outlet, and heating flows through heat-exchanger rig cold side
The cold medium being passed through in channel, to realize UTILIZATION OF VESIDUAL HEAT IN；
Flue gas after heat-exchanger rig cools down enters chimney by smoke exhaust fan, is finally exhausted to atmosphere.
Scheme four: a kind of useless ammonia incineration system of high-purity, including burner, combustion air pipeline, ammonia pipeline, combustion
High-purity described in expects pipe road, control device and scheme one is given up ammonia incinerator；The burner and the high-purity are useless
The combustor interface of ammonia incinerator connects；The exhanst gas outlet of the useless ammonia incinerator of the high-purity passes through pipeline and external chimney
Connection；The ammonia pipeline flowing has the first air intake control valve；The combustion air pipeline configured with mend wind blower and second into
Gas control valve；The fuel conduit is configured with third air intake control valve；The control device controls smoke exhaust fan, the second air inlet
Valve and differential pressure measuring device interlocked control realize negative pressure operation in the useless ammonia incinerator of high-purity；The control device is to fuel
First air intake control valve, the second air intake control valve, third air intake control valve, temperature-detecting device interlocked control are useless with high-purity
Ammonia burns in-furnace temperature and adjusts.
Scheme five: a kind of high-purity is given up ammonia burning process, is given up ammonia incineration system based on high-purity described in scheme four,
The following steps are included:
It opens the second air intake control valve door, benefit wind blower, smoke exhaust fan and is passed through air into burner hearth, inside is blown
It sweeps, accumulates ammonia in burner hearth to remove；
By to mend wind blower, smoke exhaust fan, the second air intake control valve door, differential pressure measuring device interlocked control, to two
The air quantity for mending wind blower and smoke exhaust fan is adjusted, and maintains negative pressure operation in burner hearth；
Burner is opened, third air intake control valve door is opened and is passed through fuel and lights a fire, in freeze profile at flame, burner hearth
Interior constant temperature increases；
When temperature-detecting device monitors that temperature reaches 800 DEG C in burner hearth, opens the first air intake control valve door and be passed through height
Purity is given up ammonia, and the high-purity ammonia that gives up by the first air inlet distribution apparatus is distributed in flame outer rim simultaneously full combustion；
It is adjusted by the second air intake control valve door and mends wind air quantity, combustion air is injected in fire by the second air inlet distribution apparatus
Flame periphery forms gas wall, is ammonia burning oxygenating, and be limited in localized high temperature regions within gas wall；
By control device to the first air intake control valve door, the second air intake control valve door, third air intake control valve door and temperature
Detection device interlocked control is spent, maintains 950 DEG C ± 30 DEG C of fire box temperature；
In combustion process, the ammonia not decomposed completely is sufficiently decomposed through firebreak；
High-temperature flue gas after decomposition is through smoke stack emission to atmosphere.
The utility model has the advantages that
1) incinerator is passed through through ammonia point with being used cooperatively for wind air inlet distribution apparatus, ammonia is mended by ammonia distribution device
Cloth apparatus effect is distributed in the burning of flame outer rim, so that the segment set Flame outer rim of burning, combustion air is through mending wind air inlet point
Cloth apparatus is uniformly injected in flame periphery, provides sufficient oxygen to burn, and localized hyperthermia is limited in by the gas wall formed
Within gas wall, while guaranteeing ammonia full combustion, so that the localized high temperature regions in burner hearth effectively reduce, to reduce
NOXGeneration.
2) firebreak of high temperature resistant heat storage body structure is done at furnace body back segment, furnace temperature is kept to stablize, and complete without burning
NH3Molecule can also be burnt by firebreak, in addition, can also effectively stop propagation of flame to be burnt to furnace body exhanst gas outlet,
Avoid fire safety evaluating hidden danger.Further, temperature-detecting device and differential pressure measuring device are arranged after firebreak, it is accurate in real time
Temperature and pressure in burner hearth is monitored, and avoids directly contacting with combustion flame, the service life of extension detection device.
3) middle section of incinerator is designed as approximate Venturi tube structure, so that flue gas mixes herein with two strands of air-flows of combustion air
It closes more uniformly, guarantee, which flows through back segment firebreak remnants ammonia, can be burned completely, further such that the part in burner hearth is high
Temperature area effectively reduces, and reduces NOXGeneration.
4) by the way that pressure-measuring-point is arranged in furnace body, outfit differential pressure measuring device can be by benefit wind blower, Smoke
Machine is mended in the interlocked control setting furnace of wind air intake control valve door and differential pressure measuring device as negative pressure, on the one hand guarantees that mending air door beats
It is air draught state after opening, guarantees operational safety；Another aspect negative pressure does chain, relative energy-saving with smoke exhaust fan.By will be in furnace
Setting temperature point in vivo is equipped with temperature-detecting device, can be by fuel air control valve, benefit wind air inlet in burning
Control valve, ammonia air intake control valve door and temperature-detecting device carry out interlocked control, and furnace temperature is set in 950 DEG C ± 30 DEG C,
The excessively high amount of nitrogen oxides of furnace temperature is avoided to generate more, flue gas emission is not up to standard and the too low ammonia burning of furnace temperature is insufficient.
5) control valve of incineration system, blower, detection device and control device are connected, realizes whole-course automation interlocking
Control, control is accurate, safe operation is stablized.And in incineration system, altar lamp is arranged in the burner of burner, guarantees peace in furnace
Entirely；Heat exchanger pattern selects fin-tube type, is suitble to pass through heating of the flue gas to liquid medium in ammonia manufacturing process；Mend wind blower with
Smoke exhaust fan is frequency control, can change fan delivery according to duty requirements, and be able to achieve energy conservation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of high-purity waste gas combustion furnace as described in the examples；
Fig. 2 is the structural schematic diagram of high-purity burned waste gas system as described in the examples；
Fig. 3 is the structural schematic diagram as described in the examples for mending wind air inlet distributor；
Fig. 4 is the structural schematic diagram of ammonia air inlet distribution unit as described in the examples；
Fig. 5 is the sectional view of ammonia air inlet distributor as described in the examples；
Fig. 6 is the AA sectional view of high-purity waste gas combustion furnace as described in the examples；
Fig. 7 is theory of combustion schematic diagram in embodiment；
Attached drawing mark explanation: combustor interface 1, wind-supplying mouth 2, ammonia pipe joint 3, furnace body 4, furnace body leading portion 41, furnace body
Middle section 42, furnace body back segment 43, contraction flow region 421, diffusion part 422, throat 423, temperature transmitter interface 5, lifting lug 6, differential pressure transporting
Device interface 7, saddle support 9, incinerator 10, combustor 11, mends wind air inlet distributor 12, ammonia air inlet distributor at exhanst gas outlet 8
13, fuel air control valve 14, benefit wind air intake control valve door 15, ammonia air intake control valve door 16, benefit wind blower 17, firebreak
18, temperature transmitter 19, differential pressure transmitter 20, finned tube exchanger 21, smoke exhaust fan 22, flame burner nozzle 23, central through hole 24,
Combustion air spray-hole 25, air inlet 26, main header 27, branch gas collecting tube 28, ammonia injection pipe 29.
Specific embodiment
The present invention is proposed that a kind of high-purity is given up and ammonia incinerator and is given up the burning system of ammonia incinerator using this high-purity
System, wherein high-purity gives up ammonia incinerator as a kind of useless ammonia incinerator of high-purity with special construction, is equipped with for both ends
The approximate hollow tubular structure of end plate, outer wall are the shell that steel plate rolls, and inner wall is equipped with refractory heat-insulating lining.High-purity is given up ammonia
The furnace body of gas incinerator be configured to three before, during and after three sections, furnace body leading portion be equipped with combustor interface, wind-supplying mouth, ammonia interface,
And wind air inlet distribution apparatus and ammonia air inlet distribution apparatus are mended, furnace body back segment is equipped with exhanst gas outlet.Further, high-purity is useless
The furnace body back segment (i.e. close to smoke outlet) of ammonia incinerator is additionally provided with firebreak, and furnace body middle section is also structured to approximate literary mound
In structure.It further, further include pressure-detecting device and temperature-detecting device.The useless ammonia incineration system of high-purity mainly includes combustion
Device, high-purity useless ammonia incinerator, finned tube exchanger, smoke exhaust fan are burnt, burner connects the useless ammonia of high-purity and burns
The combustor interface at stokehold end, finned tube exchanger connect the exhanst gas outlet of the useless ammonia incinerator other end of high-purity, Smoke
Machine connects at the flue gas discharge opening of finned tube exchanger.When in use, useless ammonia can be controlled by temperature, pressure in monitoring burner hearth
The input quantity of gas, combustion air, fuel, the ammonia incinerator safe operation so that high-purity is given up, it is ensured that the useless ammonia of high-purity is burnt
To the greatest extent and guarantee tail gas qualified discharge.
In ammonia combustion process, the NO of generationXIt is broadly divided into three classes: fuel type (fuel NOX), heating power type (thermal
NOX) and momentary type (prompt NOX), wherein thermal NOXBe nitrogen in combustion process in air aoxidize at high temperature and
It generates.According to thermal NOXFormation mechanism: temperature is higher, NOXProduction quantity it is more；Air content increases (i.e. combustion-supporting than increasing
Add) ignition temperature on the one hand can be reduced, but also can oxygen content be increased, finally make NOXProduction quantity increase；Part is high
The presence meeting of temperature area is so that NOXBe significantly increased.Therefore, suitable combustion-supporting ratio is selected, controls reasonable ignition temperature, as far as possible
The presence for avoiding local high temperature zone is to reduce NOXThe key of production quantity.And according to long-term engineering experience and research, it is suitable to adjust
Combustion-supporting ratio, by ammonia burning temperature control 950 DEG C or so the most rationally.
According to flame temperature gradient distribution principle, flame outermost edge is the highest region of flame temperature；In addition ammonia fires
Burning itself can also generate a large amount of heat, so that localized hyperthermia occurs in the region of burning.Therefore, ammonia is passed through flame side by design
Edge burning, so that localized hyperthermia concentrates on flame periphery, and carrying out cooling with air to the outermost edge of flame is to effectively reduce
NOXA kind of approach generated.
The present invention is specifically described below with reference to specific embodiment and attached drawing.
It gives up ammonia incinerator (hereinafter referred to as incinerator) as shown in Figure 1, embodiment 1 discloses a kind of high-purity, the incinerator
The institute of end plate is equipped with like hollow tubular structure for both ends, mainly includes furnace body 4, the combustor interface 1 that is arranged on furnace body 4, benefit
Air port 2, ammonia pipe joint 3, temperature transmitter interface 5, differential pressure transmitter interface 7 and exhanst gas outlet 8, are arranged in furnace body 4
The benefit wind air inlet distributor 12 and ammonia air inlet distributor 13 in portion, and lifting lug 6 and saddle branch for holding up and supporting furnace body 4
Seat 9.Furnace body 4 is configured to furnace body leading portion 41, furnace body middle section 42 and furnace body back segment 43.Combustor interface 1 is arranged in furnace body leading portion
At 41 end plate, wind-supplying mouth 2 and ammonia pipe joint 3 are arranged on the furnace wall of furnace body leading portion 41, after exhanst gas outlet 8 arranges furnace body
At the end plate of section 43, temperature transmitter interface 5 and differential pressure transmitter interface 7 can be arranged in furnace body leading portion 41, middle section according to demand
42 or back segment 43.The outer wall of incinerator is the shell that steel plate rolls, and inboard wall of burner hearth makees refractory heat-insulating lining, and thermal insulation material is mainly
Castable, insulation thickness are about 250mm.
Wherein, it mends wind air inlet distributor 12 to be arranged at combustor interface 1, and is connect with wind-supplying mouth 2.In conjunction with Fig. 2 and Fig. 3
Shown, mending wind air inlet distributor 12 can be used hollow round pie design, has an air inlet 26 connecting with wind-supplying mouth 2 and is used for
The central through hole 24 of flame burner nozzle is worn, is offered around central through hole 24 multiple along its circumferential equally distributed combustion air spray
Perforation 25.Flame burner nozzle, which is accessed through combustor interface 1 and is arranged in by central through hole 24, mends wind air inlet distributor 12, i.e. benefit wind
Air inlet distributor 12 is in flame tail end.Flame tail end temperature is relatively low, and mending wind air inlet distributor 12 may be selected 15CrMoR carbon
Steel material production.
Wherein, ammonia air inlet distributor 13 include the main header 27 being connect with ammonia pipe joint 3 and it is multiple with it is total
The air inlet distribution unit that gas collecting tube 27 connects, multiple air inlet distribution units are circumferentially fixed in 41 inner wall of furnace body leading portion.Extremely in conjunction with Fig. 4
Shown in Fig. 6, air inlet distribution unit includes branch gas collecting tube 28 and multiple ammonia injection pipes 29, and branch gas collecting tube 28 and main header 27 connect
Lead to and axially arranged along boiler tube length direction, ammonia injection pipe 29 extends perpendicular to branch gas collecting tube 28 and to flame direction, will
Ammonia sprays to combustion flame.In the present embodiment, main header 27 is to be laid in the round tube of the inner wall of furnace body leading portion 41 and in ammonia
It is communicated therewith at pipe joint 3, branch gas collecting tube 28 circumferentially, it is long to be slightly larger than combustion flame along main header 27 for a segment length
The straight tube of degree simultaneously opens up multiple through-holes for being used to connect ammonia injection pipe 29, and ammonia injection pipe 29 is evenly distributed on branch gas collecting tube 28
On.As a preferred embodiment, the length of ammonia injection pipe 29 is not completely equivalent, the ammonia spray being distributed on same branch gas collecting tube 28
The corresponding flame outer edge contour line matching of the end line of pipe 29 is penetrated, so that the ammonia being sent into all is sent into burning fire just
The outer rim of flame carries out full combustion.Due to directly contacting with thermal-flame, high temperature resistant 310S is may be selected in ammonia air inlet distributor 13
Stainless steel production.
As shown in connection with fig. 7, ammonia is advanced by ammonia air inlet distributor 13 after ammonia pipe joint 3 is passed through incinerator
Enter main header 27, ammonia is sent into each branch gas collecting tube 28 by main header 27, then be evenly distributed to each ammonia injection pipe 29, most
Ammonia is sprayed to flame outer rim by ammonia injection pipe 29 afterwards, so that outer rim full combustion of the ammonia in flame.At this point, combustion-supporting sky
Gas enters the benefit wind air inlet distributor 12 in furnace body 4 from wind-supplying mouth 2, is sprayed by the combustion air mended on wind air inlet distributor 12
Multiply air-flow is sprayed in hole 25 into burner hearth, forms a circle gas wall with the flame periphery that flame burner nozzle generates, provides needed for burning
Oxygen simultaneously guarantees evenly distributing for oxygen, meanwhile, because the gas wall temperature that injection is formed is lower, to flame periphery partial cooling, by office
Portion's high temperature is limited in gas within the walls.As it can be seen that the two is used cooperatively, being on the one hand able to achieve ammonia can be in flame outer rim full combustion, separately
On the one hand localized hyperthermia can be limited within gas wall, reduces NOXGeneration.
As a preferred embodiment, furnace body middle section 42 uses the design of approximate Venturi tube structure, including connection furnace body leading portion
Contraction flow region 421, the diffusion part 422 that is connect with furnace body back segment and the throat 423 between contraction flow region and diffusion part.By
This as it can be seen that present invention application Venturi tube principle, furnace body middle section 42 is designed as venturi tube structure, when the flue gas stream of burning
When through the most narrow place of variable-diameter structure herein, since caliber herein reduces, flow velocity becomes faster, so that flue gas and two strands of air-flows of combustion air
More uniformly, when flue gas flows through variable-diameter structure herein, Venturi tube back (diffusion part) is generated due to Venturi effect for mixing
Low pressure has suction-operated, so that mixed flue gas is uniformly spread, so that guaranteeing to flow through back segment firebreak remnants ammonia can be by
Burning is complete.
The completely burned for guaranteeing useless ammonia is also the key that stove is effectively run, the longer meeting of ammonia residence time in burner hearth
So that ammonia burning is more complete, but also the volume of stove can be made to become larger, cost greatly increases.As a preferred embodiment, exist
Firebreak (a kind of high-temperature thermal storage body) is set in furnace, due to having higher temperature inside firebreak accumulation of heat, the NH3 not burnt divides
Son by firebreak also can combustion decomposition, to guarantee the completely burned of ammonia.Wherein, firebreak 18 is size and section of burner hearth
The refractory ceramics heat storage to match, porosity are about 40~45%.By heat storage body structure this in furnace, so that ammonia fills
Divided combustion.The temperature of firebreak 18 is maintained at 950 ± 30 DEG C, and more than 651 DEG C of burning point of ammonia, the NH3 molecule not burnt passes through
Firebreak 18 can also burn.As it can be seen that firebreak is arranged in incinerator back segment in the present invention, on the one hand use porosity for 40~45%
Refractory ceramics heat storage so that also being fired completely when small gap of a small amount of imperfect combustion ammonia in logical firebreak
It burns, on the other hand, ceramics itself also have the advantages that property is stable simultaneously in fire resisting, stablize furnace temperature, in addition, can also effectively hinder
Gear propagation of flame is burnt to furnace body exhanst gas outlet, and the security risks such as fire are avoided.
Wherein, the temperature in burner hearth is measured by the temperature transmitter 19 that temperature transmitter interface 5 connects, is become by differential pressure
The differential pressure transmitter 20 for sending device interface 7 to connect measures the pressure change in burner hearth.It is observed in burner hearth by temperature transmitter 19
Temperature change, to carry out corresponding operation.Differential pressure transmitter 20 can be shown the observed pressure value in burner hearth with electrical signal pattern
In being set as negative-pressure operation mode in the display screen of control device, burner hearth, on the one hand guarantee that after wind-supplying mouth 2 is opened be air draught shape
State, without security risk, another aspect negative pressure does chain, relative energy-saving with smoke exhaust fan.
It should be noted that furnace body leading portion 41 is flame combustion section, the air-flow environment approximation venturi in furnace body middle section 42 is former
Reason, temperature and pressure fluctuation is larger, also relatively unstable, therefore, as a preferred embodiment, by 5 He of temperature transmitter interface
The setting of differential pressure transmitter interface 7 detects internal gas flow ring in furnace body back segment 43, by temperature transmitter 19 and differential pressure transmitter 20
The temperature and pressure value of the metastable burner hearth back segment in border keeps detected value also more accurate.In addition, by temperature transmitter 19 and poor
Pressure transmitter 20 is arranged in 18 downstream of firebreak, also can avoid detection device and is burned with direct flame contact, is used with extending
Service life.
As shown in connection with fig. 2, embodiment 2 discloses a kind of useless ammonia incineration system of high-purity, mainly includes described in embodiment 1
Incinerator 10 and combustor 11, fuel air pipeline, mend wind air inlet pipeline, ammonia air inlet pipeline, mend wind blower 17, gear
Wall with flues 18, finned tube exchanger 21 and smoke exhaust fan 22, fuel air pipeline be equipped with fuel air control valve 14, mend wind into
Air pipe, which is equipped with, to be mended wind air intake control valve door 15 and mends wind blower 17, and ammonia air inlet pipeline is equipped with ammonia air intake control valve door
16.Combustor 11, incinerator 10, finned tube exchanger 21 and smoke exhaust fan 22 are sequentially connected, the burning of fuel air piping connection
Machine 11 mends wind air inlet pipeline with ammonia air inlet pipeline and connects incinerator 10.
Specifically, combustor 11 connects the combustor interface 1 of 10 one end of incinerator, fuel air control valve 14 passes through pipe
Road connects the feed inlet of combustor 11, mends the wind-supplying mouth 2 that wind air intake control valve door 15 connects incinerator 10 by pipeline, mends wind wind
Wind air intake control valve door 15 is mended in the connection of machine 17, and ammonia air intake control valve door 16 is connect by the ammonia pipeline that pipeline connects incinerator 10
Mouth 3.21 hot-side channel of finned tube exchanger is separately connected the exhanst gas outlet 8 and smoke exhaust fan 22 of incinerator 10, finned tube heat exchange
The external cold medium source of 21 cold side channel of device, the external chimney of smoke exhaust fan 22.
Wherein, the disengaging both ends of the hot-side channel of finned tube exchanger 21 are separately connected 8 He of exhanst gas outlet of incinerator 10
Smoke exhaust fan 22.Since cold and hot side liquid medium is respectively gas and liquid, consider herein for heat exchanger type selecting performance, selection
Finned tube exchanger heat exchange property is best and cheap.Wherein, cold medium source can be ethylene glycol, isopropanol, according to ammonia
Manufacturing process flow needs preferred ethylene glycol.Preferably, cold side medium is circulatory mediator, is returned again after cooling down in process system
It is heated again in heat exchanger, to realize heat energy utilization.
Wherein, smoke exhaust fan 22 is air-introduced machine, preferably frequency control, and fan delivery may be implemented by variable frequency adjustment frequency
Adjusting.Wind blower 17 is mended it is also preferred that frequency control, can adjust air inflow according to process requirements.
Wherein, other burner replacements such as burner can also be used in combustor 11, but should be noted that burner therein
It is necessarily arranged to altar lamp, to guarantee that combustion process will not stop working.
As a preferred embodiment, which further includes control device (not illustrating in figure), all detection measurement controls
Signal and the equal access control apparatus of motor-driven valve gate control signal, and realize on the station of control device to each electric elements
Control.Specifically, temperature transmitter 19, differential pressure transmitter 20, ammonia air intake control valve door 16, mend wind air intake control valve door 15,
It mends wind blower 17, fuel air control valve 14 and smoke exhaust fan 22 and is connected to control device, realize and automatically control.Control dress
It sets and can be PLC control or DCS control, preferably PLC control.By control device to benefit wind blower 17, smoke exhaust fan 22, benefit wind
Air intake control valve door 15,20 interlocked control of differential pressure transmitter realize internal negative pressure operation；By control device to fuel air control
Valve 14 processed mends wind air intake control valve door 15, ammonia air intake control valve door 16,19 interlocked control of temperature transmitter, maintains furnace temperature
It is constant at 950 ± 30 DEG C, to avoid generating more because of the excessively high amount of nitrogen oxides of furnace temperature, flue gas emission is not up to standard or furnace temperature mistake
It is low, cause ammonia burning insufficient.
Based on the useless ammonia incineration system of high-purity as described in example 2, workflow is as follows:
It before starting, first checks whether each component connects correctly, check errorless rear and then burner hearth inside is purged, in order to avoid
The front furnace that is switched on interior residual last time remaining ammonia not being completely burned when stopping.Wind air intake control valve door is mended by opening
15, benefit wind blower 17, smoke exhaust fan 22 are passed through air into burner hearth, purge to inside, purge at least 3 hours, to guarantee
There is no the ammonias that may accumulate for burner hearth.
Successively opened smoke-discharging blower 22 mends wind air intake control valve door 15 and mends wind blower 17, the control set by DCS
Program is to mending wind blower 17, smoke exhaust fan 22, mending wind air intake control valve door 15,20 interlocked control of differential pressure transmitter, to two wind
Control is adjusted in the air quantity of machine, with realization -300Pa negative pressure.
Open combustor 11, open fuel air control valve 14 and be passed through fuel hydrogen, spark ignition freeze profile at
Flame, the temperature in burner hearth will be increased persistently at this time, the corresponding temperature that observation temperature transmitter 19 monitors, as burner hearth Nei Wenduda
When to about 500 DEG C, starts to be passed through cold medium in the cold side channel of finned tube exchanger 21, heat-exchanging component is avoided to be burned.
The corresponding temperature that temperature transmitter 19 monitors is observed, when temperature reaches about 800 DEG C in burner hearth, opens ammonia air inlet
Control valve 16 is passed through ammonia.Ammonia is come into full contact with by ammonia air inlet distributor 13 with flame, so that ammonia full combustion.
Ammonia burning can generate amount of heat, the fuel input for reducing combustor 11 be controlled by DCS system, but cannot
Allow fray-out of flame, in order to avoid have explosion danger.
By mend wind air intake control valve door 15 adjust mend wind air quantity, by mend wind air inlet distributor 12, air through mend wind into
Spray-hole on gas distributor 12 forms gas wall in flame outer rim, so that localized high temperature regions (about 1400~1500 DEG C) are limited in
Flame outer most edge is reduced in burner hearth because of the NO that localized hyperthermia generatesXGeneration.
Fuel air control valve 14 is controlled by PLC system, mends wind air intake control valve door 15, ammonia air intake control valve door
16,19 interlocked control of temperature transmitter maintains 950 DEG C ± 30 DEG C of fire box temperature, avoids fire box temperature excessively high.
The flue gas that useless ammonia burning generates flows through firebreak 18, and micro undecomposed ammonia is flowing through 18 mistake of firebreak in flue gas
It is decomposed completely in journey.
950 DEG C or so of high-temperature flue gas enters the hot-side channel of finned tube exchanger 21 through exhanst gas outlet 8, and heating flows through wing
The cold medium being passed through in the cold side channel of piece heat exchange of heat pipe 21, and the cold medium after heating can be used for other techniques and used, with
Realize waste heat recycling and reusing.
After finned tube exchanger 21 completes heat exchange, the flue gas after cooling enters chimney by smoke exhaust fan 22, finally
It is emitted into atmosphere.
It should be noted that since hydrogen content is bigger in ammonia, a large amount of vapor can be generated in stove combustion process, often
Baker to be carried out is needed after secondary parking, to ensure that burner hearth is not burned the condensation that generated humid air is generated because gradually cooling down
Aqueous corrosion.
Embodiment 3 discloses a kind of high-purity ammonia incineration system of giving up
Finned tube exchanger 21 and smoke exhaust fan 22, according to duty requirements, the exhanst gas outlet 8 of incinerator 10 by flue directly and chimney
Connection.Corresponding burning process reduces heat exchange and heat compared with ammonia incineration system of giving up using high-purity as described in example 2
It can recycle, reduce input cost, other essentially identical, details are not described herein again.
One group of concrete application test case based on the useless ammonia incineration system of high-purity as described in example 2 is given below:
Relevant parameter: useless ammonia concentration: 99.9%；Useless ammonia maximum throughput: 70kg/h；Auxiliary fuel: hydrogen；Circulation
Liquid: glycol water；Largest loop liquid measure: 30 tons/h；Glycol water is into temperature: 50 DEG C；
Opened smoke-discharging blower 22 and wind blower 17 is mended, fuel hydrogen is passed through in fuel machine 11 and point by purging after 3 hours
Fire, fire box temperature start to increase, and the temperature in burner hearth are observed in console by temperature transmitter 19, when temperature is increased to centainly
When numerical value (about 500~600 DEG C), glycol circulation liquid is passed through into finned tube exchanger 21.
When detecting that temperature rises to 800 DEG C, ammonia air intake control valve door 16 is opened, starts to be passed through ammonia, and pass through DCS
Control system controls ammonia air intake control valve door 16, fuel air control valve 14 and mends wind air intake control valve door 15, adjusts ammonia
The ratio of gas, hydrogen, combustion air maintains 950 DEG C ± 30 DEG C of fire box temperature to burn, and in burning process, the flue gas of generation passes through
Firebreak 18 burns micro undecomposed ammonia completely, then about 100 DEG C are down to after finned tube exchanger 21, then passes through row
Cigarette blower 22 enters chimney direct emission.In the process, into the cold medium glycol circulation liquid of finned tube exchanger 21 by
50 DEG C are heated to 65 DEG C, can be used for the condensation purification of ammonia.
It should be understood that above-mentioned specific embodiment is the preferred embodiment of the present invention, the scope of the present invention is not limited to
The embodiment, all any changes done according to the present invention, comes under within protection scope of the present invention.
Claims (10)
- The ammonia incinerator 1. a kind of high-purity is given up, which is characterized in that including furnace body, be arranged in combustor interface on furnace body, mend Air port, ammonia pipe joint and exhanst gas outlet, be arranged in the intracorporal first air inlet distribution apparatus of furnace, the second air inlet distribution apparatus and Firebreak, and the temperature-detecting device for detecting furnace body temperature and the differential pressure measuring dress for detecting pressure in furnace body It sets；First air inlet distribution apparatus passes through wind-supplying mouth by ammonia pipe joint and ammonia piping connection, the second air inlet distribution apparatus It is connect with combustion air pipeline；When fuel generates flame in burner hearth by the flame burner nozzle of burner, by first into The ammonia that ammonia pipeline introduces is distributed in flame outer rim full combustion by gas distribution apparatus, will be helped by the second air inlet distribution apparatus The combustion air that air pipe line introduces is fired axially to spray to form gas wall in flame periphery.
- The ammonia incinerator 2. high-purity as described in claim 1 is given up, which is characterized in that the first air inlet distribution apparatus includes It the main header that is connect with ammonia pipe joint and is connect with main header and the multiple ammonias circumferentially distributed along inboard wall of furnace body Distribution unit；Multiple ammonia injection pipes that the ammonia distribution unit includes branch gas collecting tube and connect with branch gas collecting tube, each ammonia The outer edge contour line of the corresponding flame axial direction of the injection direction face flame and end line of injection pipe matches.
- The ammonia incinerator 3. high-purity as described in claim 1 is given up, which is characterized in that the second air inlet distribution apparatus is by structure Hollow form structure is made, and there is an air inlet connecting with wind-supplying mouth and multiple circumferentially distributed combustion air spray-holes.
- The ammonia incinerator 4. high-purity as claimed in claim 3 is given up, which is characterized in that the second air inlet distribution apparatus also has Have one for wearing the central through hole of flame burner nozzle, the combustion air spray-hole is circumferential uniform centered on the central through hole Distribution.
- The ammonia incineration system 5. a kind of high-purity is given up, which is characterized in that including burner, ammonia pipeline, combustion air pipeline, Fuel conduit, heat-exchanger rig, smoke exhaust fan, control device, and the high-purity as described in Claims 1-4 any one are useless Ammonia incinerator；The flame burner nozzle of the burner is altar lamp, and the combustor with the useless ammonia incinerator of the high-purity Interface connection；The connection of the feed inlet of the fuel conduit and burner；The hot-side channel import of the heat-exchanger rig connects institute State the exhanst gas outlet of the useless ammonia incinerator of high-purity, hot-side channel outlet connection smoke exhaust fan, the external cold medium of cold side channel；Institute Stating ammonia pipeline flowing has the first air intake control valve；The combustion air pipeline is configured with benefit wind blower and the second air inlet control Valve；The fuel conduit is configured with third air intake control valve；The control device is to benefit wind blower, smoke exhaust fan, the second air inlet Control valve and differential pressure measuring device interlocked control are adjusted with realizing that the useless ammonia of high-purity burns furnace pressure；The control device To the first air intake control valve of fuel, the second air intake control valve, third air intake control valve, temperature-detecting device interlocked control, with reality The existing useless ammonia of high-purity burns in-furnace temperature and adjusts.
- The ammonia incineration system 6. high-purity as claimed in claim 5 is given up, which is characterized in that the heat-exchanger rig changes for finned tube Hot device.
- The ammonia incineration system 7. high-purity as claimed in claim 5 is given up, which is characterized in that the smoke exhaust fan and benefit wind blower For frequency control.
- The ammonia burning process 8. a kind of high-purity is given up, which is characterized in that based on high-purity described in claim 5 to 7 any one Spend useless ammonia incineration system, comprising the following steps:It opens the second air intake control valve door, benefit wind blower, smoke exhaust fan and is passed through air into burner hearth, inside is purged, with It removes and accumulates ammonia in burner hearth；By to mend wind blower, smoke exhaust fan, the second air intake control valve door, differential pressure measuring device interlocked control, to mend wind blower It is adjusted with the air quantity of smoke exhaust fan, maintains negative pressure operation in burner hearth；Burner is opened, third air intake control valve door is opened and is passed through fuel and lights a fire, in freeze profile at flame, temperature in burner hearth Degree is lasting to be increased, the temperature of observation temperature-detecting device monitoring, when temperature reaches 500 DEG C in burner hearth, the cold side of heat-exchanger rig Start to be passed through cold medium in channel；It is logical to open the first air intake control valve door when temperature reaches 800 DEG C in burner hearth for the temperature for observing temperature-detecting device monitoring Enter the useless ammonia of high-purity, the useless ammonia of high-purity is distributed in flame outer rim and full combustion by the first air inlet distribution apparatus；It is adjusted by the second air intake control valve door and mends wind air quantity, combustion air is injected in outside flame by the second air inlet distribution apparatus It encloses to form gas wall, is ammonia burning oxygenating, and be limited in localized high temperature regions within gas wall；The first air intake control valve door, the second air intake control valve door, third air intake control valve door and temperature are examined by control device Device interlocked control is surveyed, maintains 950 DEG C ± 30 DEG C of fire box temperature；In combustion process, the ammonia not decomposed completely is sufficiently decomposed through firebreak；High-temperature flue gas after decomposition enters the hot-side channel of heat-exchanger rig through exhanst gas outlet, and heating flows through heat-exchanger rig cold side channel In the cold medium that is passed through, to realize UTILIZATION OF VESIDUAL HEAT IN；Flue gas after heat-exchanger rig cools down enters chimney by smoke exhaust fan, is finally exhausted to atmosphere.
- The ammonia incineration system 9. a kind of high-purity is given up, which is characterized in that including burner, combustion air pipeline, ammonia pipeline, Fuel conduit, control device, and the useless ammonia incinerator of high-purity as described in Claims 1-4 any one；The burning Device is connect with the combustor interface of the useless ammonia incinerator of the high-purity；The exhanst gas outlet of the useless ammonia incinerator of the high-purity It is connect by pipeline with external chimney；The ammonia pipeline flowing has the first air intake control valve；The combustion air pipeline configuration Have and mends wind blower and the second air intake control valve；The fuel conduit is configured with third air intake control valve；The control device is to row Cigarette blower, the second air intake control valve and differential pressure measuring device interlocked control realize negative pressure operation in the useless ammonia incinerator of high-purity； The control device is to the first air intake control valve, the second air intake control valve, third air intake control valve, temperature-detecting device interlocking control System is adjusted with realizing that the useless ammonia of high-purity burns in-furnace temperature.
- The ammonia burning process 10. a kind of high-purity is given up, which is characterized in that burnt based on the useless ammonia of high-purity as claimed in claim 9 Burning system, comprising the following steps:It opens the second air intake control valve door, benefit wind blower, smoke exhaust fan and is passed through air into burner hearth, inside is purged, with It removes and accumulates ammonia in burner hearth；By to mend wind blower, smoke exhaust fan, the second air intake control valve door, differential pressure measuring device interlocked control, to two benefit wind The air quantity of blower and smoke exhaust fan is adjusted, and maintains negative pressure operation in burner hearth；Burner is opened, third air intake control valve door is opened and is passed through fuel and lights a fire, in freeze profile at flame, temperature in burner hearth Degree is lasting to be increased；When temperature-detecting device monitors that temperature reaches 800 DEG C in burner hearth, opens the first air intake control valve door and be passed through high-purity Useless ammonia, the useless ammonia of high-purity are distributed in flame outer rim and full combustion by the first air inlet distribution apparatus；It is adjusted by the second air intake control valve door and mends wind air quantity, combustion air is injected in outside flame by the second air inlet distribution apparatus It encloses to form gas wall, is ammonia burning oxygenating, and be limited in localized high temperature regions within gas wall；The first air intake control valve door, the second air intake control valve door, third air intake control valve door and temperature are examined by control device Device interlocked control is surveyed, maintains 950 DEG C ± 30 DEG C of fire box temperature；In combustion process, the ammonia not decomposed completely is sufficiently decomposed through firebreak；High-temperature flue gas after decomposition is through smoke stack emission to atmosphere.
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| CN113294779A (en) * | 2021-05-28 | 2021-08-24 | 华中科技大学 | High-temperature air combustion device for ammonia gas |
| CN115159571A (en) * | 2022-06-29 | 2022-10-11 | 安徽望盛钒基新材料技术有限公司 | Production V based on ammonium vanadate raw material 2 O 5 Process system and method |
| CN115854369A (en) * | 2023-02-17 | 2023-03-28 | 江苏齐清环境科技有限公司 | Method and device for treating m-phthalonitrile ammonia oxidation waste gas based on negative pressure direct combustion type combustion purification treatment technology |
| CN117065551A (en) * | 2023-10-18 | 2023-11-17 | 上海鲁源控制设备有限公司 | Mixing equipment for denitration ammonia injection |
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