CN106838937B - A kind of formaldehyde exhaust combustion and heat recovery system and its operating method - Google Patents
A kind of formaldehyde exhaust combustion and heat recovery system and its operating method Download PDFInfo
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- CN106838937B CN106838937B CN201611092899.XA CN201611092899A CN106838937B CN 106838937 B CN106838937 B CN 106838937B CN 201611092899 A CN201611092899 A CN 201611092899A CN 106838937 B CN106838937 B CN 106838937B
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 139
- 238000011084 recovery Methods 0.000 title claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 30
- 238000011017 operating method Methods 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 105
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 239000002918 waste heat Substances 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 19
- 239000003546 flue gas Substances 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 10
- 238000004880 explosion Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 241000842962 Apoda limacodes Species 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 230000005619 thermoelectricity Effects 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000809 air pollutant Substances 0.000 description 2
- 231100001243 air pollutant Toxicity 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
Abstract
A kind of formaldehyde exhaust combustion and heat recovery system, including gas handling system, igniter, burner, adiabatic furnace, overfire air device, burner hearth flame-out protection device and heat recovery system, the adiabatic furnace is located at the front of the gas handling system, the igniter is installed on the top on the rear inner wall of adiabatic furnace and positioned at the overfire air device, the burner, overfire air device is respectively positioned in the adiabatic furnace, the overfire air device is located at the top of the burner and on the left and right sides inner wall of adiabatic furnace, the gas outlet of the gas handling system is connected to the air inlet of the burner, the gas outlet of air blower is connected to the air inlet of the overfire air device.The present invention provides a kind of preferable safety, the higher formaldehyde exhaust combustion of heat utilization efficiency and heat recovery system and its operating method.
Description
Technical field
The invention belongs to technical field of pipeline connection, more particularly, to a kind of formaldehyde exhaust combustion and heat recovery system and its
Operating method.
Background technology
Silver-colored 37% formaldehyde of legal system Formaldehyde Production contains H in the tail gas of final three tower top discharge2About 18-20%, CO, CH4、O2
Each 0.5%, CO25%, N272-74%, water and micro formaldehyde, methanol etc..Wherein about 20% or so combustible gas, calorific value is about
526Kcal/Nm3If being utilized to burning generates steam, pollution can be not only eliminated, but also steam can be generated.Formaldehyde tail gas belongs to poor
Gas, mainly containing 20% or so H2, oxyhydrogen reaction category explosive reaction.Therefore, how safe efficiently using as key
Problem.
At present although general Formaldehyde Production factory is provided with formaldehyde exhaust gas heat recovery boiler, but one of water seal of generally use fills
It sets, burner is not equipped with automatic ignition device, is not equipped with burner hearth flame-out protection device, and safety is poor；Not using guarantor
Warm adiabatic furnace, burner hearth do not use staged air distribution device, efficiency of combustion relatively low；Waste heat boiler generally use vertical fire-pipe formula knot
Structure does not use efficient heating surface, and heating surface area arrangement is insufficient, and waste heat boiler exhaust gas temperature is higher, and waste heat boiler tail portion does not have
Have and uses flue gas condensing technology, heat recovery rate low；UTILIZATION OF VESIDUAL HEAT IN energy after the exhaust combustion that often one ton of formaldehyde of production generates
The low-pressure saturated steam of 0.25 ton or so of production.
Chinese patent discloses in CN201520921389.3 and CN201120276282.X, is all made of one of water seal dress
It sets, burner is not equipped with automatic ignition device, is not equipped with burner hearth flame-out protection device, not using heat preservation heat insulation furnace
Thorax, burner hearth do not use staged air distribution device, waste heat boiler tail portion not to use flue gas condensing technology.
In conclusion at present although general Formaldehyde Production factory is provided with formaldehyde exhaust gas heat recovery boiler, but safety is poor, profit
With inefficient.
Invention content
There are safeties in order to overcome existing formaldehyde exhaust gas heat recovery boiler poor, the lower deficiency of heat utilization efficiency, the present invention
There is provided that a kind of safety is preferable, the higher formaldehyde exhaust combustion of heat utilization efficiency and heat recovery system and its operating method.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of formaldehyde exhaust combustion and heat recovery system, including gas handling system, igniter, burner, adiabatic furnace,
Overfire air device, burner hearth flame-out protection device and heat recovery system, the adiabatic furnace are located at the front of the gas handling system, institute
Igniter is stated to be installed on the rear inner wall of adiabatic furnace and positioned at the top of the overfire air device, the burner,
Overfire air device is respectively positioned in the adiabatic furnace, and the overfire air device is located at the top of the burner and mounted on exhausted
On the left and right sides inner wall of hot stove thorax, the gas outlet of the gas handling system is connected to the air inlet of the burner, air blower
Gas outlet is connected to the air inlet of the overfire air device；
The burner hearth flame-out protection device includes flame monitoring apparatus and PLC control cabinet, and the flame monitoring apparatus is located at
The top of overfire air device is simultaneously installed on the preceding inner wall of adiabatic furnace, the flame monitoring apparatus and the PLC control cabinet
Connection, the PLC control cabinet are connect with the intake valve of the gas handling system；
The heat recovery system includes waste heat boiler, energy-saving appliance and condenser, the top gas outlet of the adiabatic furnace with
The lower part air inlet connection of waste heat boiler, the gas outlet of the waste heat boiler are connected to the air inlet of the energy-saving appliance, the section
The gas outlet of energy device is connected to the air inlet of the condenser, and the gas outlet of the condenser is connected to the air inlet of air-introduced machine,
The gas outlet of air-introduced machine is connected to the smoke inlet of chimney.
Further, the gas handling system include tail gas inlet manifold, intake valve, the first inlet pipe connection, the first water sealed tank,
Second inlet pipe connection, the first air outlet valve, third inlet pipe connection, the 4th inlet pipe connection, the second air outlet valve, exhaust emissions fire
Torch pipe, the 5th inlet pipe connection, the second water sealed tank, the 6th inlet pipe connection and air inlet distributor box, the tail gas inlet manifold's
Gas outlet is connect by the intake valve with the air inlet of the first inlet pipe connection, and the gas outlet of first inlet pipe connection is inserted
Under the bottom liquid level for entering the first water sealed tank, the air inlet of second inlet pipe connection and the upper front of the first water sealed tank connect
Logical, the gas outlet of second inlet pipe connection is connect by the first air outlet valve with the air inlet of third inlet pipe connection, described
The gas outlet of third inlet pipe connection is connect with the inlet end of the air inlet distributor box, the outlet side of the air inlet distributor box and institute
State burner connection；
The air inlet of 4th inlet pipe connection is connected to the top of the first water sealed tank, the 4th inlet pipe connection
Gas outlet is connect by the second air outlet valve with the inlet end of the exhaust emissions flare stack, the outlet of the exhaust emissions flare stack
End is equipped with pressure release igniter；Be connected on rear side of the top of the air inlet of 5th inlet pipe connection and the first water sealed tank, the described 5th into
The gas outlet of gas connecting tube is connected to the top of the second water sealed tank, and the air inlet of the 6th inlet pipe connection is inserted into the second water seal
Under the bottom liquid level of slot, the gas outlet of the 6th inlet pipe connection is connect with the inlet end of the exhaust emissions flare stack.
Further, the igniter includes high-energy igniter, ignitor and torch oil gun, the high-energy igniter
It is connect with the rear end of the ignitor, the front end of the ignitor passes through the rear inner wall of adiabatic furnace to be located at adiabatic furnace
Interior, the rear end of the torch oil gun is connect with oil feed pump, and the front end of the torch oil gun passes through the preceding inner wall of adiabatic furnace.
Further, the burner uses multi-tube structure, burner to use swirl vane formula structure.
Further, the overfire air device includes more than two overfire air jets, on the same side wall of adiabatic furnace
More than two overfire air jets in two rows dislocation arrangement.
Further, the waste heat boiler includes boiler body, and radiation chamber and convection cell, institute are equipped in the boiler body
The inner wall of radiation chamber is stated using membrane wall heating surface, the interior festoon for being equipped with lateral arrangement of the convection cell, the water pipe
The outer wall of beam constitutes convection heating surface, and explosion proof door is additionally provided on the waste heat boiler, and the explosion proof door setting is heated in membrane wall
On face.
Further, the energy-saving appliance and condenser have helix fin tubular type heating surface, helix fin tubular type heating surface
It is staggered in arrangement using flue gas transversal flow.
Further, the pressure release igniter is made of high-energy igniter and ignitor.
The operating method of a kind of formaldehyde exhaust combustion and heat recovery system, includes the following steps：
1) intake valve, the first air outlet valve, are first turned on, formaldehyde tail gas passes sequentially through tail gas inlet manifold, intake valve, first
Inlet pipe connection, the first water sealed tank, the second inlet pipe connection, the first air outlet valve, third inlet pipe connection, air inlet distributor box, most
Enter burner afterwards；Air blower is opened, cold air enters overfire air device from the gas outlet of air blower；
2) after, formaldehyde tail gas is by ignition device, with the sky ejected from the overfire air jet of overfire air device
After gas mixing, in heat insulation furnace chamber inner combustion, high-temperature flue gas carries heat and enters waste heat boiler, by the membrane wall of waste heat boiler by
After hot face and convection heating surface absorb heat, flue gas enters energy-saving appliance and condenser, after temperature further decreases, passes through air-introduced machine
Be drawn, be discharged into chimney.
Further, when normal work, when the gaseous-pressure of tail gas inlet manifold is excessively high, formaldehyde tail gas is automatically by the 5th
Inlet pipe connection, the second water sealed tank, the 6th inlet pipe connection, exhaust emissions flare stack carry out pressure release；
Before burner is stopped, the second air outlet valve is first opened, closes intake valve and the first air outlet valve.
The present invention main advantageous effect be：Gas handling system prevents normal combustion using double water sealed tanks and operated pneumatic valve assembly
Releasing pressure automatically when Shi Fasheng tempering and admission pressure exception, improves safety；Using light oil automatic ignition device, burner hearth is first carried out
Purging, then light oil igniting, then air inlet, prevent igniting from detonation occurs, improve ignition security；Using flame monitoring apparatus, carry out
The first air outlet valve is automatically closed when flame monitoring apparatus is monitored less than flare up fire in blowout protection, improves safety in operation；
Explosion proof door is installed, safety in operation is improved；
Using heat preservation adiabatic furnace, staged air distribution is carried out using overfire air device, the burning of low excess air coefficient is realized, subtracts
The generation and discharge of low NOx；Waste heat boiler and energy-saving appliance, condenser use efficient heating surface；Using flue gas condensing skill
Art improves heat recovery efficiency.
Description of the drawings
Fig. 1 is a kind of formaldehyde exhaust combustion and the structural schematic diagram of heat recovery system.
Fig. 2 is the front view of burner.
Fig. 3 is the vertical view of Fig. 2.
Fig. 4 is the right view of Fig. 2.
Fig. 5 is the structural schematic diagram of burner.
Fig. 6 is the structural schematic diagram of waste heat boiler.
Fig. 7 is the schematic diagram of helix fin tubular type heating surface.
Fig. 8 is that A-A schemes in Fig. 7.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
Referring to Fig.1~Fig. 8, a kind of formaldehyde exhaust combustion and heat recovery system, including gas handling system, igniter, burning
Device 15, adiabatic furnace 16, overfire air device 17, burner hearth flame-out protection device and heat recovery system, the adiabatic furnace 16
In the front of the gas handling system, the igniter is installed on the rear inner wall of adiabatic furnace 16 and is located at the Secondary Air
The top of device 17, the burner 15, overfire air device 17 are respectively positioned in the adiabatic furnace 16, the overfire air device
17 are located at the top of the burner 15 and are mounted on the left and right sides inner wall of adiabatic furnace 16, the outlet of the gas handling system
Mouth is connected to the air inlet of the burner 15, and the gas outlet of air blower 18 and the air inlet of the overfire air device 17 connect
It is logical；
The burner hearth flame-out protection device includes flame monitoring apparatus 27 and PLC control cabinet 28, the flame monitoring apparatus
27 are located at the top of overfire air device 17 and are installed on the preceding inner wall of adiabatic furnace 16, the flame monitoring apparatus 27 and institute
The connection of PLC control cabinet 27 is stated, the PLC control cabinet 28 is connect with the intake valve of the gas handling system；
The heat recovery system includes waste heat boiler 19, energy-saving appliance 20 and condenser 21, the top of the adiabatic furnace 16
Gas outlet is connected to the lower part air inlet of waste heat boiler 19, the air inlet of the gas outlet of the waste heat boiler 19 and the energy-saving appliance 20
Mouthful connection, the gas outlet of the energy-saving appliance 20 is connected to the air inlet of the condenser 21, the gas outlet of the condenser 21 and
The air inlet of air-introduced machine 22 is connected to, and the gas outlet of air-introduced machine 22 is connected to the smoke inlet of chimney 26.
Further, the gas handling system includes tail gas inlet manifold 1, intake valve 2, the first inlet pipe connection 3, the first water seal
Slot 4, the second inlet pipe connection 5, the first air outlet valve 6, third inlet pipe connection 7, the 4th inlet pipe connection 8, the second air outlet valve 9,
Exhaust emissions flare stack 10, the 5th inlet pipe connection 11, the second water sealed tank 12, the 6th inlet pipe connection 13 and air inlet distributor box
14, the gas outlet of the tail gas inlet manifold 1 is connect by the intake valve 2 with the air inlet of the first inlet pipe connection 3, described
The gas outlet of first inlet pipe connection 3 is inserted under the bottom liquid level of the first water sealed tank 4, the air inlet of second inlet pipe connection 5
Mouth is connected to the upper front of the first water sealed tank 4, and the gas outlet of second inlet pipe connection 5 passes through the first air outlet valve and third
The air inlet of inlet pipe connection 7 connects, the inlet end of the gas outlet of the third inlet pipe connection 7 and the air inlet distributor box 14
Connection, the outlet side of the air inlet distributor box 14 is connect with the burner；
The air inlet of 4th inlet pipe connection 8 is connected to the top of the first water sealed tank 4, the 4th inlet pipe connection
8 gas outlet is connect by the second air outlet valve 9 with the inlet end of the exhaust emissions flare stack 10, the exhaust emissions flare stack
10 outlet side is equipped with pressure release igniter；It is connected on rear side of the air inlet of 5th inlet pipe connection 11 and the top of the first water sealed tank 4,
The gas outlet of 5th inlet pipe connection 11 is connected to the top of the second water sealed tank 12, the 6th inlet pipe connection 13 into
Gas port is inserted under the bottom liquid level of the second water sealed tank 12, gas outlet and the exhaust emissions fire of the 6th inlet pipe connection 13
The inlet end of torch pipe 10 connects.
Further, the igniter includes high-energy igniter 23, ignitor 24 and torch oil gun 25, the high energy
Igniter 23 is connect with the rear end of the ignitor 24, and the front end of the ignitor 24 passes through after adiabatic furnace 16 within the walls
Wall is located in adiabatic furnace 16, and the rear end of the torch oil gun 25 is connect with oil feed pump 30, and the front end of the torch oil gun 25 is worn
Cross the preceding inner wall of adiabatic furnace 16.
Further, the burner 15 uses multi-tube structure, burner 31 to use swirl vane formula structure.
Further, the overfire air device 17 includes more than two overfire air jets, in 16 the same side of adiabatic furnace
More than two overfire air jets on wall are in two rows dislocation arrangement.
Further, the waste heat boiler 19 includes boiler body, and radiation chamber and convection cell are equipped in the boiler body,
For the inner wall of the radiation chamber using membrane wall heating surface 32, the interior festoon for being equipped with lateral arrangement of the convection cell is described
The outer wall of festoon constitutes convection heating surface 33, and explosion proof door 29 is additionally provided on the waste heat boiler 19, and the explosion proof door 29 is arranged
On membrane wall heating surface 32.
Further, the energy-saving appliance 20 and condenser 21 have a helix fin tubular type heating surface, helix fin tubular type by
Hot face is staggered in arrangement using flue gas transversal flow.
Further, the pressure release igniter is made of high-energy igniter and ignitor.
In the present embodiment, operated pneumatic valve assembly includes intake valve 2, the first air outlet valve 6 and the second air outlet valve 9；
The overfire air device 17 is set to the left and right sides inner wall of adiabatic furnace 16, and height higher slice arrangement is realized and divided
Level air-distribution reduces the ignition temperature in adiabatic furnace 16, reduces generation and the discharge capacity of NOx；Both sides jetting type Secondary Air stagger arrangement
To spray, it is sent into the air that excess air coefficient is about 1.15 or so；Overfire air jet air outlet velocity about 50m/s, Secondary Air range
About 2 meters；Formaldehyde tail gas and air carry out adiabatic combustion after being sufficiently mixed in adiabatic furnace 16；Because formaldehyde tail gas belongs to lean gas,
About 800 DEG C or so of adiabatic combustion temperature, according to data of literatures, heating power nitrogen and quick nitrogen yield are considerably less at 800 DEG C, right
For this system, the fuel bound nitrogen generated in 1.15 or so low excess air coefficients, 800 DEG C or so low-temperature burnings is also very
Few, actual measurement is about 30mg/Nm3；It is significantly less than GB13271-2014《Emission standard of air pollutants for boilers》Middle key area is new
Build gas fired-boiler limitation 150mg/Nm3；
There is waste heat boiler 19 membrane wall heating surface 32 and convection heating surface 33, convection heating surface 33 laterally to be rushed using flue gas
Brush in-line arrangement, flue gas flow rate about 8-9m/s or so, energy-saving appliance 20 and condenser 21 have helix fin tubular type heating surface 34；Spiral shell
Rotation fin tubular type heating surface 34 is staggered in arrangement using flue gas transversal flow；Flue gas flow rate about 8m/s or so；Spiral finned tube fin
Thickness 1.2mm, spacing about 8-10mm, fin height about 0.25d；Formaldehyde tail gas hydrogen content about 20% generates after burning in flue gas
Vapor volume share about 14% or so, about 60 DEG C of flue gas aqueous dew point temperature, if exhaust gas temperature is reduced to dew-point temperature 60
DEG C hereinafter, then in flue gas vapor be condensed into water release the latent heat of vaporization, by condenser cold water absorb after using energy-saving appliance
Further enter waste heat boiler after heating, then boiler thermal efficiency will improve about 6%-7%.Through theoretical calculation and practical test, row
Smoke temperature degree drops to 50 DEG C or so, then it is produced through waste heat boiler using this system often to produce formaldehyde tail gas caused by one ton of formaldehyde
Low-pressure saturated steam is up to 500Kg；
The burner uses multi-tube structure, and nozzle is the critical piece of burner, using swirl vane formula knot
Structure；Blade tilt is 60 °, jet expansion wind speed about 5m/s.
The operating method of a kind of formaldehyde exhaust combustion and heat recovery system is：
Formaldehyde tail gas passes sequentially through tail gas inlet manifold 1, intake valve 2, the first inlet pipe connection 3, the first water sealed tank 4,
Two inlet pipe connections 5, the first air outlet valve 6, third inlet pipe connection 7, air inlet distributor box 14；When normal work, intake valve 2 and
One air outlet valve, 6 standard-sized sheet；First water sealed tank 4 is for preventing burner 15 to be tempered；
The purging of adiabatic furnace 16 is first carried out before igniting, then by ignition device, then open the first air outlet valve 6 into formaldehyde tail
Gas normal combustion；
Before burner 15 is stopped, the second air outlet valve 9 is first opened, closes intake valve 2 and the first air outlet valve 6；
When normal work, when the gaseous-pressure of tail gas inlet manifold 1 is excessively high, formaldehyde tail gas connects automatically by the 5th air inlet
Take over 11, the second water sealed tank 12, the 6th inlet pipe connection 13,10 pressure release of exhaust emissions flare stack；Prevent a large amount of formaldehyde in short-term
Tail gas enters burner 15 and adiabatic furnace 16 and assembles, and has little time burning the rising of tail gas concentration is caused to reach explosion limit to cause
Safety accident；
Formaldehyde tail gas is by gas handling system, into burner 15, after ignition device, and from overfire air device
After the air mixing ejected in 17 overfire air jet, the burning in adiabatic furnace 16, high-temperature flue gas carries more than heat entrance
Heat boiler 19, after absorbing heat by the membrane wall heating surface 32 and convection heating surface 33 of waste heat boiler 19, flue gas enters energy saving
Device 20 and condenser 21 after temperature further decreases, by being drawn for air-introduced machine 22, are discharged into chimney 26；
Cold air enters overfire air device 17 from the gas outlet of air blower 18, is sprayed from the nozzle of overfire air device 17, two
Secondary wind nozzle stagger arrangement, layered arrangement realize staged air distribution, the burning of low excess air coefficient, reduce the generation and discharge of NOx；
Using hearth flame monitoring device, blowout protection is carried out, when flame monitoring apparatus is monitored less than flare up fire, from
It is dynamic to close the first air outlet valve 6, improve safety in operation；
The configuration of the present invention is simple has higher burning and heat exchange efficiency, high safety and reliability；Formaldehyde exhaust combustion and heat
Recovery system can be produced generated tail gas with PARA FORMALDEHYDE PRILLS(91,95) and is recycled, and the thermal energy recycling discharged is used for heat supply,
Heat recovery efficiency is higher than existing treatment technology, and effectively reduces conventional combustion and polluted using generated NOx, realizes
The harmless treatment of industrial waste gas.The tail gas of discharge meets GB13271-2014《Emission standard of air pollutants for boilers》With it is other
The regulation of standard.
Claims (9)
1. a kind of formaldehyde exhaust combustion and heat recovery system, it is characterised in that：Including gas handling system, igniter, burner,
Adiabatic furnace, overfire air device, burner hearth flame-out protection device and heat recovery system, the adiabatic furnace are located at the gas handling system
Front, the igniter is installed on the rear inner wall of adiabatic furnace and positioned at the top of the overfire air device, described
Burner, overfire air device are respectively positioned in the adiabatic furnace, and the overfire air device is located at the top of the burner
And on the left and right sides inner wall of adiabatic furnace, the gas outlet of the gas handling system and the air inlet of the burner connect
Logical, the gas outlet of air blower is connected to the air inlet of the overfire air device；
The burner hearth flame-out protection device includes flame monitoring apparatus and PLC control cabinet, and the flame monitoring apparatus is located at secondary
The top of wind apparatus is simultaneously installed on the preceding inner wall of adiabatic furnace, and the flame monitoring apparatus is connect with the PLC control cabinet,
The PLC control cabinet is connect with the intake valve of the gas handling system；
The heat recovery system includes waste heat boiler, energy-saving appliance and condenser, the top gas outlet of the adiabatic furnace and waste heat
The lower part air inlet connection of boiler, the gas outlet of the waste heat boiler are connected to the air inlet of the energy-saving appliance, the energy-saving appliance
Gas outlet be connected to the air inlet of the condenser, the gas outlet of the condenser is connected to the air inlet of air-introduced machine, air inducing
The gas outlet of machine is connected to the smoke inlet of chimney；
The gas handling system includes tail gas inlet manifold, intake valve, the first inlet pipe connection, the first water sealed tank, the second air inlet company
Take over, the first air outlet valve, third inlet pipe connection, the 4th inlet pipe connection, the second air outlet valve, exhaust emissions flare stack, the 5th
The gas outlet of inlet pipe connection, the second water sealed tank, the 6th inlet pipe connection and air inlet distributor box, the tail gas inlet manifold passes through
The intake valve is connect with the air inlet of the first inlet pipe connection, and the first water seal is inserted into the gas outlet of first inlet pipe connection
Under the bottom liquid level of slot, the air inlet of second inlet pipe connection is connected to the upper front of the first water sealed tank, and described second
The gas outlet of inlet pipe connection is connect by the first air outlet valve with the air inlet of third inlet pipe connection, the third air inlet connection
The gas outlet of pipe is connect with the inlet end of the air inlet distributor box, and outlet side and the burner of the air inlet distributor box connect
It connects；
The air inlet of 4th inlet pipe connection is connected to the top of the first water sealed tank, the outlet of the 4th inlet pipe connection
Mouth is connect by the second air outlet valve with the inlet end of the exhaust emissions flare stack, and the outlet side of the exhaust emissions flare stack is set
There is pressure release igniter；It is connected on rear side of the air inlet of 5th inlet pipe connection and the top of the first water sealed tank, the 5th air inlet connects
The gas outlet taken over is connected to the top of the second water sealed tank, and the air inlet of the 6th inlet pipe connection is inserted into the second water sealed tank
Under the liquid level of bottom, the gas outlet of the 6th inlet pipe connection is connect with the inlet end of the exhaust emissions flare stack.
2. a kind of formaldehyde exhaust combustion as described in claim 1 and heat recovery system, it is characterised in that：The igniter packet
High-energy igniter, ignitor and torch oil gun are included, the high-energy igniter is connect with the rear end of the ignitor, the point
The front end of thermoelectricity pole passes through the rear inner wall of adiabatic furnace to be located in adiabatic furnace, and rear end and the oil feed pump of the torch oil gun connect
It connects, the front end of the torch oil gun passes through the preceding inner wall of adiabatic furnace.
3. a kind of formaldehyde exhaust combustion as described in claim 1 and heat recovery system, it is characterised in that：The burner is adopted
With multi-tube structure, burner uses swirl vane formula structure.
4. a kind of formaldehyde exhaust combustion as described in claim 1 and heat recovery system, it is characterised in that：The overfire air device
Including more than two overfire air jets, more than two overfire air jets on the same side wall of adiabatic furnace are in two rows
Dislocation arrangement.
5. a kind of formaldehyde exhaust combustion as described in claim 1 and heat recovery system, it is characterised in that：The waste heat boiler packet
Include boiler body, be equipped with radiation chamber and convection cell in the boiler body, the inner wall of the radiation chamber using membrane wall by
Hot face, the interior festoon for being equipped with lateral arrangement of the convection cell, the outer wall of the festoon constitute convection heating surface, the waste heat
Explosion proof door is additionally provided on boiler, the explosion proof door is arranged on membrane wall heating surface.
6. a kind of formaldehyde exhaust combustion as described in claim 1 and heat recovery system, it is characterised in that：The energy-saving appliance and cold
There is condenser helix fin tubular type heating surface, helix fin tubular type heating surface to be staggered in arrangement using flue gas transversal flow.
7. a kind of formaldehyde exhaust combustion as described in claim 1 and heat recovery system, it is characterised in that：The pressure release igniter
It is made of high-energy igniter and ignitor.
8. the operating method of a kind of formaldehyde exhaust combustion as described in claim 1 and heat recovery system, it is characterised in that：Including
Following steps：
1) intake valve, the first air outlet valve, are first turned on, formaldehyde tail gas passes sequentially through tail gas inlet manifold, intake valve, the first air inlet
Connecting tube, the first water sealed tank, the second inlet pipe connection, the first air outlet valve, third inlet pipe connection, air inlet distributor box, it is most laggard
Enter burner；Air blower is opened, cold air enters overfire air device from the gas outlet of air blower；
2) it after, formaldehyde tail gas is by ignition device, is mixed with the air ejected from the overfire air jet of overfire air device
After conjunction, in heat insulation furnace chamber inner combustion, high-temperature flue gas carries heat and enters waste heat boiler, passes through the membrane wall heating surface of waste heat boiler
After absorbing heat with convection heating surface, flue gas enters energy-saving appliance and condenser, after temperature further decreases, passes through the pumping of air-introduced machine
Draw, is discharged into chimney.
9. the operating method of a kind of formaldehyde exhaust combustion and heat recovery system as described in claim 8, it is characterised in that：Just
Often when work, when the gaseous-pressure of tail gas inlet manifold is excessively high, formaldehyde tail gas is automatically by the 5th inlet pipe connection, the second water
Sealing groove, the 6th inlet pipe connection, exhaust emissions flare stack carry out pressure release；
Before burner is stopped, the second air outlet valve is first opened, closes intake valve and the first air outlet valve.
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| CN201611092899.XA CN106838937B (en) | 2016-11-27 | 2016-11-27 | A kind of formaldehyde exhaust combustion and heat recovery system and its operating method |
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| CN107314360A (en) * | 2017-07-13 | 2017-11-03 | 董庆忠 | Alcohol-based fuel boiler |
| CN108644793A (en) * | 2018-07-16 | 2018-10-12 | 南通江天化学股份有限公司 | Silver-colored formaldehyde tail gas incinerating and treating device |
| CN110887051B (en) * | 2019-11-22 | 2021-06-15 | 西藏江硕环保科技有限公司 | A waste gas burns burning furnace that burning is abundant for environmental protection engineering |
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| CN102168852A (en) * | 2010-12-23 | 2011-08-31 | 北京机电院高技术股份有限公司 | Method and device for reducing emission limits of nitrogen oxides in waste incineration flue gas |
| CN102221213B (en) * | 2011-04-08 | 2012-10-10 | 北京航天动力研究所 | Device for burning and processing exhaust gas and waste water containing PMIDA and glyphosate |
| CN102353073A (en) * | 2011-08-02 | 2012-02-15 | 威海宝源电气有限公司 | Automatic control method for burner type industrial boiler and device for automatic control method |
| CN103062776B (en) * | 2013-01-04 | 2015-08-19 | 无锡亿恩科技股份有限公司 | Burn dewatered sludge for heating the circulating fluidized bed incinerator of wet mud |
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| CN105546552B (en) * | 2015-12-29 | 2018-03-20 | 东南大学 | Resinae dangerous waste fluid bed high temperature incineration purifying integration device and method |
| CN206222340U (en) * | 2016-11-27 | 2017-06-06 | 浙江双峰锅炉制造有限公司 | A kind of formaldehyde exhaust combustion and heat recovery system |
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Denomination of invention: A formaldehyde exhaust combustion and heat recovery system and its operating method Effective date of registration: 20231116 Granted publication date: 20181019 Pledgee: Zhejiang Wuyi Rural Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG SHUANGFENG BOILER Co.,Ltd. Registration number: Y2023980065841 |