CN106823719B - A kind of the integral type self-heating decomposing system and method for laughing gas - Google Patents
A kind of the integral type self-heating decomposing system and method for laughing gas Download PDFInfo
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- CN106823719B CN106823719B CN201710198945.2A CN201710198945A CN106823719B CN 106823719 B CN106823719 B CN 106823719B CN 201710198945 A CN201710198945 A CN 201710198945A CN 106823719 B CN106823719 B CN 106823719B
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- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 238000010438 heat treatment Methods 0.000 title claims abstract description 35
- 235000013842 nitrous oxide Nutrition 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- 230000033228 biological regulation Effects 0.000 claims abstract description 7
- 230000003447 ipsilateral effect Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- 238000003672 processing method Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 239000006227 byproduct Substances 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- -1 stop valve Chemical compound 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 30
- 238000012545 processing Methods 0.000 description 7
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000001361 adipic acid Substances 0.000 description 3
- 235000011037 adipic acid Nutrition 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- PZZOEXPDTYIBPI-UHFFFAOYSA-N 2-[[2-(4-hydroxyphenyl)ethylamino]methyl]-3,4-dihydro-2H-naphthalen-1-one Chemical compound C1=CC(O)=CC=C1CCNCC1C(=O)C2=CC=CC=C2CC1 PZZOEXPDTYIBPI-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/402—Dinitrogen oxide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention provides the integral type self-heating decomposing system and method for a kind of laughing gas, including stop valve, heat exchanger, preheater, reactor and steam generator；The stop valve, the cold side of heat exchanger, preheater, reactor, steam generator and heat exchanger hot side be followed in series to form series via；The part of the steam generator being connected in the series via is its tube side part；The hot side outlet of the heat exchanger is communicated with the atmosphere；In the series via, the in parallel bypass for being provided with preheater bypass valve in the section both ends of the preheater.The invention can reduce reaction outlet temperature, by-product high-grade steam while handling high concentration laughing gas, reduce requirement of the system to material, to reducing the construction costs and maintenance cost, also have good operating flexibility and regulation performance.
Description
Technical field
The invention belongs to technical field of air pollution control, and in particular to a kind of integral type self-heating decomposing system of laughing gas and
Method.
Background technique
Nitrous oxide (N2O it) is commonly called as laughing gas, is a kind of greenhouse gases, increase from global warming causes greenhouse effects
Ability is much stronger than carbon dioxide and methane.N simultaneously2There are also destructions to ozone layer by O, and this destruction is equally much stronger than fluorine
Chlorocarbon.Currently, the tail gas of adipic acid plant discharge is a big source of laughing gas.Adipic acid be most important aliphatic dibasic acid it
One, it is largely used to the production of polyurethane, nylon salt and plasticizer.In the tail gas of adipic acid plant discharge, laughing gas volume point
Number up to 30%, and discharge amount is huge, it is most of at present to be all directly discharged in atmosphere, significant impact will be generated to environment.
Laughing gas property is highly stable, may exist over one hundred year in an atmosphere.The decomposition product of laughing gas be nitrogen and oxygen, two
Person is the ultimate constituent of atmosphere, without poisonous and harmful by-product.Laughing gas molecule is made of N-N key and N-O key, and research is found
N-N key ratio N-O key is more difficult to separate, and opens the activation energy that N-O key takes around 250~270kJmol-1, and no catalyst exists
When need about 900 DEG C could be by N2O is decomposed completely, needs to consume a large amount of thermal energy, how to be realized that low-temperature decomposition laughing gas becomes and is ground
The big target of the one of the person of studying carefully.Meanwhile the decomposable process of laughing gas is strong exothermal reaction, reaction heat is big, and reaction temperature rising is big, in order to reduce
The temperature rise of reaction product generally dilutes laughing gas using compressed air, but the gas temperature completely after decomposition can still rise 300 DEG C of left sides
On the one hand the right side is easy to generate peace because of hot-spot so that laughing gas processing system has the problem of not easy to control, adjusting, poor flexibility
On the other hand full problem also proposes high requirement to the material of laughing gas processing unit, improves manufacture and maintenance cost.
Summary of the invention
In view of this, the invention be directed to it is a kind of especially suitable for laughing gas and its integral type self-heating of similar reaction
Decomposing system and method are built using Stainless Steel material, can be reduced while handling high concentration laughing gas reaction outlet temperature,
By-product high-grade steam also has good regulation performance.
The integral type self-heating decomposing system that the invention provides includes stop valve, heat exchanger, preheater, reactor and steaming
Vapour generator；The stop valve, the cold side of heat exchanger, preheater, reactor, steam generator and heat exchanger hot side successively go here and there
Connection constitutes series via；The part of the steam generator being connected in the series via is its tube side part；It is described to change
The hot side outlet of hot device is communicated with the atmosphere；In the series via, the section both ends of the preheater are in parallel to be provided with preheating
The bypass of device bypass valve.
Wherein, in the series via, the series connection section between the stop valve and heat exchanger is equipped with a compressed air
Branch entrance.Further, the compressed air branch road is equipped with pressure regulator valve.
Wherein, in the series via, the in parallel side for being provided with recuperator bypass valve in the cold side both ends of the heat exchanger
Road.
Wherein, the shell side inlet of the steam generator is passed through the deaerated water outside system, becomes steam after exchanging heat
Shell-side outlet through the steam generator is sent out.
Wherein, the reactor is self-heating reactor, has reactor shell side and reactor tube side, the reactor enclosure
The entrance of journey is connected with the bypass outlet where the outlet of the preheater or the preheater bypass valve, the reactor shell side
Outlet be connected with the entrance of the reactor tube side, the outlet of the reactor tube side and the tube side of the steam generator enter
Mouth is connected, and the reactor shell side is heating region, and the reactor tube side is conversion zone.Preferably, the reactor is
Vertical U-tube formula reactor.It is furthermore preferred that the reactor shell side is equipped with two entrances in parallel, it is located at reactor enclosure
The middle part and lower part of journey, and it is ipsilateral with the entrance of reactor tube side；The outlet of the reactor shell side is disposed in proximity to shell side
Top, and it is ipsilateral with the outlet of reactor tube side.
Wherein, the outlet of the preheater is equipped with the first temperature measuring equipment, and the conversion zone entrance of the reactor is equipped with the
The conversion zone outlet of two temperature measuring equipments, the reactor is equipped with third temperature measuring equipment, and the stop valve is surveyed by the third
The signal of warm device controls, and the regulating device of the preheater is simultaneously by first temperature measuring equipment and the second temperature measuring equipment
Signal Regulation and control.
Wherein, the preheater be electric heater, the heat exchanger be plate heat exchanger or shell-and-tube heat exchanger, preferably
For plate heat exchanger, the steam generator is autoclave evaporator or vertical type evaporator.
The present invention also provides a kind of processing method of exhaust gas containing laughing gas, using above-mentioned integral type self-heating decomposing system, when
When system is stablized, preheater is cut out into series via, controls the inlet temperature of the conversion zone of reactor at 400 ± 10 DEG C,
The outlet temperature of the conversion zone of reactor fluctuates in the range of 450-600 DEG C, and the cutting temperature of stop valve is set as 620 ±
5℃。
Compared with the existing technology, the present invention has the advantage that
(1) system operating temperature is lower than the tolerable temperature of stainless steel material, and each equipment and pipeline can use in system
Stainless steel material manufacture, it is cheap；
(2) sufficiently can recycle and utilize reaction heat, can by-product GOOD TASTE steam, improve the value of heat recovery,
Increase economic benefit while meeting environmental protection；
(3) system regulation performance is good, and elasticity is high, adaptable, adapts to different operating conditions, and when mode of operation fluctuation,
It can automatically adjust, it is highly-safe；
(4) using heat exchange, reaction integrated design, number of devices is few, and system and its device structure are simple, easy to accomplish,
Construction cost is low, and operation control is simple and convenient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of integral type self-heating decomposing system of the present invention.
Wherein, 1- stop valve；2- heat exchanger；3- preheater；4- reactor；41- reactor shell side；42- reactor tube side；
5- steam generator；6- pressure regulator valve；7- preheater bypass valve；8- recuperator bypass valve；The first temperature measuring equipment of 91-；92- second is surveyed
Warm device；93- third temperature measuring equipment.
Specific embodiment
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.
Following term in description of the invention and claims has the general sense in industry, for convenience of understanding,
Simple illustration has been done below.
Tube side: referring within the heat exchanger tube of pipe shell type heat exchange equipment (such as steam generator, reactor) and directly phase
Space in end socket even, is all suitable for all pipe shell type heat exchange equipment.
Shell side: refer to other than the heat exchanger tube of pipe shell type heat exchange equipment (such as steam generator, reactor), the sky within shell
Between, tube side and shell side are separated by heat exchanger tube, and the fluid in the two only mutually exchanges heat, and cannot directly be contacted.
Cold side: referring to the side that colder fluid flows through in heat exchange equipment (such as heat exchanger), can absorb heat from hot side.
Hot side: referring to the side that hotter fluid flows through in heat exchange equipment (such as heat exchanger), can release heat to cold side.
Bypass: it is directly connected to the entrance of equipment (such as heat exchanger or valve) and the bridging pipeline of outlet, for setting around this
It is standby and be directly entered downstream, it can be equipped with valve on this bridging pipeline, which be commonly referred to as bypass valve.
The technical solution of this case is further elaborated with reference to the accompanying drawing.
Integral type self-heating decomposing system of the invention includes stop valve 1, heat exchanger 2, preheater 3, reactor 4 and steam hair
Raw device 5；The stop valve 1, the cold side of heat exchanger 2, preheater 3, reactor 4, steam generator 5 and heat exchanger 2 hot side according to
Secondary series via in series；The part of the steam generator 5 being connected in the series via is its tube side part；Institute
The hot side outlet for stating heat exchanger 2 is communicated with the atmosphere；In the series via, the setting in parallel of the section both ends of the preheater 3
There is the bypass of preheater bypass valve 7.
The stop valve 1 is used to cut off the gas to be processed (tail-gas with a smile) into whole system in needs
Conveying.The heat exchanger 2 can be by the remaining recuperation of heat of the tail gas after producing steam, for anti-wait enter in the series via
It answers the gas to be processed of device to be preheated, system waste heat is sufficiently recycled.The preheater 3 be used for system drive into
Enter before stable operation to whole system pipeline, equipment and operation gas (including gas to be processed and the compressed air being passed through) into
Row preheating, makes system be rapidly achieved stable state, and preheater bypass valve 7 is used for after system enters stable state by preheater 3
Cut out series via.The reactor 4 is the device treated processing gas and carry out reaction treatment.The steam generator 5 can
The heat of product in reactor 4 is sufficiently recycled, by-product high-grade steam is used for the needs of other production and living.
Wherein, in the series via, it is empty that the series connection section between the stop valve 1 and heat exchanger 2 is equipped with a compression
Gas branch entrance, for being passed through compressed air into system, compressed air can play adjustment system pressure, adjustment gas to be processed
The versatiles such as bulk concentration, regulating system temperature rise.Further, the compressed air branch road is equipped with pressure regulator valve 6, for adjusting
Section enters the pressure of the compressed air of system.
Wherein, in the series via, the cold side both ends of the heat exchanger 2 are in parallel to be provided with recuperator bypass valve 8
Bypass.Recuperator bypass valve 8 can control changing for heat exchanger 2 by adjusting the fluid flow or flow velocity of the cold side of heat exchanger 2
Heat, and then adjust, control the temperature into the gas to be processed in the conversion zone of reactor 4, improve system and device
Operating flexibility prevents reaction heat from excessively being recycled, and circulation accumulation, eventually leads to device overtemperature in the device.
Wherein, the shell side inlet of the steam generator 5 can be passed through the deaerated water outside system, become after exchanging heat
Steam is sent out through the shell-side outlet of the steam generator 5, realizes that the high-quality of heat of reaction recycles.
Wherein, the reactor 4 is self-heating reactor, has reactor shell side 41 and reactor tube side 42, described anti-
The entrance of device shell side 41 is answered to be connected with the bypass outlet where the outlet of the preheater 3 or the preheater bypass valve 7, it is described
The outlet of reactor shell side 41 is connected with the entrance of the reactor tube side 42, the outlet and the steaming of the reactor tube side 42
The tube-side inlet of vapour generator 5 is connected, and the reactor shell side 41 is heating region, and the reactor tube side 42 is reaction zone
Domain.Preferably, the reactor 4 be vertical U-tube formula reactor, shell side heating region for treat processing gas carry out into
The heating of one step, the heat source of heating mostly come from the heat release of tube side conversion zone, are filled in tube side conversion zone to be processed
Gas (laughing gas) decomposition catalyst, for the catalytic decomposition of gas to be processed, heat that decomposition reaction is released by tube side reaction
Region is transferred to the heating region of shell side, and the gas wait participate in reaction is heated to about 400 DEG C.Further, the reactor
Shell side 41 is set there are two entrance in parallel, is located at the middle part and lower part of reactor shell side 41, and with reactor tube side 42
Entrance is ipsilateral, for reducing the temperature of high-temperature gas in the reactor tube side 42 after reacting in time, while avoiding having just enter into reaction
The temperature of the gas in region is lowered, and is unable to reach the initial temperature that reaction requires；The outlet of the reactor shell side 41 is arranged
It is and ipsilateral with the outlet of reactor tube side 42 in the top close to shell side, for sufficiently recycling 42 near exit of reactor tube side
The heat of high-temperature gas, and the temperature difference inside and outside 42 entrance reaction tube of reactor tube side is reduced, avoid unreacted gas quilt
It cools down in advance.The present invention for sake of convenience, when reactor 4 is considered as an entirety, then distinguish by the entrance of reactor 4 or outlet
Refer to reactor 4 relative to external entrance and exit, i.e., the respectively entrance of reactor shell side 41 and reactor tube side 42 goes out
Mouthful.
Wherein, the outlet of the preheater 3 is equipped with the first temperature measuring equipment 91, and the conversion zone entrance of the reactor 4 is set
Have the second temperature measuring equipment 92, the conversion zone outlet of the reactor 4 is equipped with third temperature measuring equipment 93, the stop valve 1 by
The regulating device of the Signal Regulation and control of the third temperature measuring equipment 93, the preheater 3 (has in itself for preheater 3
Device, such as switch valve or heating power control valve) simultaneously by first temperature measuring equipment 91 and the second temperature measuring equipment 92
Signal Regulation and control.The regulating device of the stop valve 1, preheater bypass valve 7 and preheater 3 can be according to preparatory configuration
Or setting flows through access where it respectively under the signal control action for the temperature measuring equipment connecting with its signal in adjustment system
Fluid flow or flow velocity, thus realize the temperature of system target site is adjusted and is controlled.
Wherein, the preheater 3 is electric heater；Heat exchanger 2 is plate heat exchanger or shell-and-tube heat exchanger, is preferably
Plate heat exchanger, heat transfer coefficient is high, compact-sized；The steam generator 5 is autoclave evaporator or vertical type evaporator.
Above-mentioned integral type self-heating decomposing system provided by the invention is very suitable for the processing of tail-gas with a smile, can also fit
For other other with similar reaction characteristics (reaction needs higher initial temperature, and simultaneous reactions process is exothermic reaction)
The processing of fluid.
Above-mentioned integral type self-heating decomposing system is applied to the vent gas treatment containing laughing gas, when the system is stable, by preheater 3
Series via (cutting out except system operation) is cut out, controls the inlet temperature of the conversion zone of reactor 4 400 ± 10
DEG C, the outlet temperature of the conversion zone of reactor 4 is controlled at 450-600 DEG C, and the cutting temperature of stop valve 1 is set as 620 ± 5
℃.The heat that the process conditions can to the maximum extent generate laughing gas reaction be recycled, and when steady running does not need
External world's input heat, while being capable of by-product high-grade steam.
A course of work of this system is briefly introduced so that laughing gas is handled as an example below.
Firstly, opening the pressure regulator valve 6 of compressed air branch road, recuperator bypass valve 8, stop valve 1, preheater bypass are closed
Valve 7.Each equipment, valve and route profiling in system are got through using compressed air, compressed air is successively introduced to heat exchanger 2
Cold side, preheater 3, reactor 4, the tube side of steam generator 5, heat exchanger 2 hot side, be finally discharged into atmosphere.Meanwhile to steam
The shell side of generator 5 introduces deaerated water to suitable liquid level.
Then, compressed air is used to preheat as heat carrier to system.Preheater 3 is come into operation, electric energy is used
Heated compressed air then flows sequentially through the tube side of reactor 4, the tube side of steam generator 5, heat exchanger 2 to 400 DEG C, will be each
Equipment, pipeline successively preheat, and are finally discharged into atmosphere.
Then, when the outlet temperature of reactor 4 is basically unchanged, stop valve 1 is opened, laughing gas is gradually introduced into system,
Make laughing gas follow compressed air along the shell side that series via sequentially enters preheater 3, reactor 4, be heated to 400 DEG C it is laggard
Enter the tube side of reactor 4.Laughing gas will be in the interior reaction of decomposing of the conversion zone of reactor 4 (reactor tube side 42), temperature liter
Height, and the gas for flowing through the heating region (reactor shell side 41) of reactor 4 in advance is heated, meanwhile, the regulating device of preheater 3
The heating power of preheater 3 will be gradually decreased according to the inlet temperature of reactor tube side 42, until being 0.
Finally, being gradually increased the flow into the tail-gas with a smile of system to design value, keep each index of system stable.
The bypass where preheater bypass valve 7 is opened, preheater 3 is closed, the preheater 3 is cut out to the operation of system, is entered at this time
The gas of system can be heated to 400 DEG C in the self-heating reactor 4.When stable operation, 41 entrance of reactor shell side
Laughing gas volume fraction is 14.53%, and the inlet temperature of reactor shell side 41 is 147 DEG C, and the inlet temperature of reactor tube side 42 is
400 DEG C, 4 outlet temperature of reactor is 497 DEG C.
In the above process and system stable operation, when supplied materials fluctuation, system can make adjust automatically.When supplied materials flow
When increase or laughing gas concentration increase, the heat that the conversion zone of reactor 4 is released be will increase, and temperature increases.It controls at this time
System can be automatically increased the aperture of preheater bypass valve 7, reduce the heat exchange amount of heat exchanger 2, that is, be lowered into 4 gas of reactor
Temperature, to reduce the temperature of reactor 4.Since the heat exchange amount of heat exchanger 2 reduces, extra reaction heat will be as treated
Tail gas is discharged into atmosphere, to avoid recycling in systems, accumulate, is caused system temperature to be integrally lifted, is eventually exceeded material
Tolerable temperature.When supplied materials flow-reduction or laughing gas concentration reduce, then it can reduce the aperture of preheater bypass valve 7 automatically, it is described
The outlet temperature of reactor 4 can be controlled in 450 with the variation of the parameters such as laughing gas concentration, temperature in tail gas to be processed
It is fluctuated in the range of DEG C -600 DEG C.
The taste of 5 byproduct steam of steam generator can be secondary depending on the demand of the master device of laughing gas processing unit subordinate
The temperature of producing steam can be 100-300 DEG C, and can be adjusted according to the actual situation.
Stop valve 1 is for preventing equipment and the temperature of pipeline beyond respective ability to bear, by the outlet of the reactor 4
Temperature determines the state of its on or off.For example, closing stop valve 1 when the outlet temperature of the reactor 4 reaches 620 DEG C
Reaction is interrupted, prevents temperature from continuing to rise.Compressed air continues to purge whole system, and temperature decline guarantees system safety.
The foregoing is merely the preferred embodiments of the invention, are not intended to limit the invention creation, all at this
Within the spirit and principle of innovation and creation, any modification, equivalent replacement, improvement and so on should be included in the invention
Protection scope within.
Claims (10)
1. a kind of integral type self-heating decomposing system, including stop valve, heat exchanger, preheater, reactor and steam generator；It is described
Stop valve, the cold side of heat exchanger, preheater, reactor, steam generator and heat exchanger hot side to be followed in series to form series connection logical
Road；The part of the steam generator being connected in the series via is its tube side part；The hot side of the heat exchanger goes out
Mouth is communicated with the atmosphere；In the series via, the in parallel side for being provided with preheater bypass valve in the section both ends of the preheater
Road；The reactor be self-heating reactor, have reactor shell side and reactor tube side, the entrance of the reactor shell side with
Bypass outlet where the outlet of the preheater or the preheater bypass valve is connected, the outlet of the reactor shell side and institute
The entrance for stating reactor tube side is connected, and the outlet of the reactor tube side is connected with the tube-side inlet of the steam generator, institute
Stating reactor shell side is heating region, and the reactor tube side is conversion zone.
2. integral type self-heating decomposing system according to claim 1, which is characterized in that described to cut in the series via
Series connection section between disconnected valve and heat exchanger is equipped with a compressed air branch entrance.
3. integral type self-heating decomposing system according to claim 2, which is characterized in that the compressed air branch road is equipped with
Pressure regulator valve.
4. integral type self-heating decomposing system according to claim 1, which is characterized in that described to change in the series via
The in parallel bypass for being provided with recuperator bypass valve in the cold side both ends of hot device.
5. integral type self-heating decomposing system according to claim 1, which is characterized in that the shell side of the steam generator enters
Mouth is passed through the deaerated water outside system, becomes steam after exchanging heat and sends out through the shell-side outlet of the steam generator.
6. integral type self-heating decomposing system according to claim 1, which is characterized in that the reactor is vertical U-tube
Formula reactor.
7. integral type self-heating decomposing system according to claim 1, which is characterized in that the reactor shell side is equipped with two
Entrance in parallel, is located at the middle part and lower part of reactor shell side, and ipsilateral with the entrance of reactor tube side；The reactor
The outlet of shell side is disposed in proximity to the top of shell side, and ipsilateral with the outlet of reactor tube side.
8. integral type self-heating decomposing system according to claim 1, which is characterized in that the outlet of the preheater is equipped with the
One temperature measuring equipment, the conversion zone entrance of the reactor are equipped with the second temperature measuring equipment, and the conversion zone of the reactor exports
Equipped with third temperature measuring equipment, the stop valve is controlled by the signal of the third temperature measuring equipment, the adjusting dress of the preheater
It sets while Signal Regulation and control by first temperature measuring equipment and the second temperature measuring equipment.
9. integral type self-heating decomposing system according to claim 1, which is characterized in that preheater is electric heater, described
Heat exchanger is plate heat exchanger or shell-and-tube heat exchanger, and the steam generator is autoclave evaporator or vertical type evaporator.
10. the processing method of a kind of exhaust gas containing laughing gas, using the described in any item integral type self-heating resolving systems of claim 1-9
System, when the system is stable, cuts out series via for preheater, make the inlet temperature of the conversion zone of reactor control 400 ±
10 DEG C, the outlet temperature of the conversion zone of reactor fluctuates in the range of 450-600 DEG C, and the cutting temperature of stop valve is set as
620±5℃。
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1519049A (en) * | 2003-02-03 | 2004-08-11 | 巴斯福股份公司 | Combustion method of waste gas contg. oxygen and combustible compsn. |
| CN105396460A (en) * | 2015-12-25 | 2016-03-16 | 华烁科技股份有限公司 | Method for efficient combined removal of N2O and NOx |
| CN105705226A (en) * | 2013-11-06 | 2016-06-22 | 瓦特燃料电池公司 | Liquid fuel cpox reformers and methods of cpox reforming |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1519049A (en) * | 2003-02-03 | 2004-08-11 | 巴斯福股份公司 | Combustion method of waste gas contg. oxygen and combustible compsn. |
| CN105705226A (en) * | 2013-11-06 | 2016-06-22 | 瓦特燃料电池公司 | Liquid fuel cpox reformers and methods of cpox reforming |
| CN105396460A (en) * | 2015-12-25 | 2016-03-16 | 华烁科技股份有限公司 | Method for efficient combined removal of N2O and NOx |
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