CN109899809A - Handle the accumulation of heat regenerative oxidator of VOCs exhaust gas - Google Patents
Handle the accumulation of heat regenerative oxidator of VOCs exhaust gas Download PDFInfo
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- 239000012855 volatile organic compound Substances 0.000 title description 103
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 99
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000011148 porous material Substances 0.000 claims abstract description 10
- 238000005338 heat storage Methods 0.000 claims abstract description 8
- 239000007800 oxidant agent Substances 0.000 claims description 12
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Abstract
A kind of accumulation of heat regenerative oxidator handling VOC exhaust gas, wherein, contain two or more regenerative chambers, a high-temperature oxydation reaction chamber and overtemperature logic controller, the porous regenerator bed for thering is porous material to be piled into its regenerative chamber, high-temperature oxydation reaction chamber is located above regenerative chamber and in conjunction with regenerative chamber, there is partially porous material to constitute the cold bypass express passway of gas inside heat storage tank using the material that porosity is big, thermal capacity is low in the porous regenerator bed, and is equipped with the flow control valve controlled by overtemperature logic controller in the cold bypass express passway bottom of gas；Waste gas containing VOC is imported into accumulation of heat regenerative oxidator, via preheating, high temperature oxidation process；When VOC exhaust gas concentration is more than that limit value causes temperature to increase, flow control valve is controlled using overtemperature logic controller, leader VOC exhaust gas enters high-temperature oxydation reaction chamber via the cold bypass express passway of gas, the operation temperature of control high-temperature oxydation reaction chamber is adjusted, it is unexpected that overtemperature occurs to avoid system.
Description
Technical field
The main object of the present invention is to provide a kind of accumulation of heat regenerative oxidator (Regenerative for handling VOC exhaust gas
Thermal Oxidizer, RTO), it is characterized in that cold bypass express passway and flow control valve are equipped in regenerative chamber, via
High-temperature oxydation reaction chamber overtemperature logic controller allows part VOCs exhaust gas to maintain lower temperature and is directly entered high temperature oxygen
Change reaction chamber, can thoroughly solve accumulation of heat regenerative oxidator (RTO) when VOC exhaust gas concentration transfinites, recurrent high temperature
Oxidation reaction chamber overtemperature and the problem of fire.
Background technique
Volatile organic compounds (Volatile Organic Compounds, VOCs) is the pollution of industry common air
One of object, main source are chemical plant, petrochemical industry, rubber industry, Plastics Industry, press, coating industry, adhesive tape industry, circuit board
Industry and high-tech semiconductor integrated circuit emerging in recent years manufacture and electro-optical liquid crystal display industry.Since VOCs has poison
Property and it is easily destroyed atmospheric ozone layer, so must be controlled to avoid earth environment is endangered.It is existing developed and business
The VOCs of change pollute anti-control equipment technology include incinerate, absorption, absorb, the methods of condensation, can be basically divided into it is destructive and
Two methods of non-destructive.Disruptive method includes that incineration, high-temperature oxydation and catalyst aoxidize, and VOCs is translated under this mechanism
CO2And the lesser substance of the pollutions such as water or other inertia；And non-destructive method is then to utilize the objects such as absorption, absorption and condensation
Reason method will be shifted with physical method in VOCs self-discharging exhaust gas, become clean gas.
Commercial technologies at present, it is however generally that, low concentration is vented (< 10-20mg/m3) it is most of with active carbon adsorption at
Reason, middle low concentration gas (50-1000mg/m3) incinerate method using Adsorption Concentration/desorption and handle, middle concentration waste gas (500-5,
000mg/m3) handled using heat accumulating type oxidizing process (RTO) processing or regenerative catalyzed oxidation (RCO), high-concentration waste gas (> 5,000-
10,000mg/m3) (DFTO), high temperature pulse wave reactor combination RTO (PDR-RTO), condensing recovery processing are then incinerated with flame.
If containing middle low concentration sulphur or nitrogen component foul smell, can be handled with chemical washing method.However, in above-mentioned each common processing method
There are its advantage and disadvantage and applicable occasion, particularly with the higher situation of VOCs concentration, current commercialized processing method, in addition to
Other than PDR-RTO, in face of processing operation is at high cost, is easy to produce explosion or the puzzlement of fire risk.
The high-temperature oxydation or incineration process technology of VOCs is generally divided into high temperature and incinerates two kinds of method of method and catalyst incineration.According to it
Energy recovery mode is classified, then the high-temperature oxydation of VOCs or incineration facility can be divided into recovery type heat oxidator again
(Recuperative Thermal Oxidizer) and accumulation of heat regenerative oxidator (Regenerative Thermal
Oxidizer) two kinds of major techniques.Recovery type heat oxidator is to provide gas containing VOCs and high-temperature combustion product with heat exchanger
Make heat exchange use, to recycle the high-temperature exhaust air heat of high-temperature combustion product generation, the heat recovery rate of recovery type heat oxidator is logical
Often about 70-85%；Accumulation of heat regenerative oxidator is then to recycle high-temperature combustion product exhaust gas heat with magnetic heat storage material storage of making pottery,
It is alternatively used for heating exhaust gas containing VOCs, the heat recovery rate of heat accumulating type oxidator may be up to 90~95% or more.General VOCs exhaust gas
Hot incineration process, though the combustor flame temperature of high-temperature oxydation reaction chamber up to 1,350~1500 DEG C, mixed gas
800~850 DEG C are normally controlled in the ignition temperature of high-temperature oxydation reaction chamber, gas hold-up time is usually 0.5~2.5 second,
Reacting indoor air velocity in high-temperature oxydation is usually 3~15m/s.Under the above conditions, the removal of stink substances and VOCs
Rate is usually i.e. up to 99% or more.But for special intractable VOCs, the operation temperature of high-temperature oxydation reaction chamber then needs height
Up to 900~1,100 DEG C, gas residence time is then optionally designed as 1.0~3.0 seconds, and air velocity is 8~10m/s.
General accumulation of heat regenerative oxidator (RTO) includes at least two energy storage beds, air inlet control equipment, heating and temperature control
Control equipment.Filled stone matter or ceramic heat-storing material, the gas to be handled are introduced into the first energy storage bed and are preheated to centainly in energy storage bed
After temperature, reaction is carried out in high-temperature oxydation room and removes VOCs therein, when high-temperature gas passes through another energy storage bed after reaction, gas
The accumulation of heat material that body heat can cool down incoming original stores the sensible heat of high-temperature gas, and gas is then with the discharge of lower temperature.To one
After fixing time, switch valve is intended to processing gas and then imports the high breeding ground preheating, and high-temperature gas energy is then stored in A after reaction,
Complete an operation circulation (operation cycle).
Typical accumulation of heat regenerative oxidator (RTO) is as shown in Figure 1.Accumulation of heat regenerative oxidator 1 includes at least two storages
Hot cell (including: the first regenerative chamber 10, the second regenerative chamber 20), air inlet control equipment (include: the first regenerative chamber air inlet valve 110, the
Two regenerative chamber air inlet valves 112), outlet control equipment (include: the first regenerative chamber exhaust valve 130, the second regenerative chamber exhaust valve
132), heating equipment (includes: combustor 60, auxiliary fuel supply line 201, auxiliary fuel flow control valve 202, air stream
Adjustable valve 212) and Temperature-controlled appliance (including: combustion completion controller 300, temperature sensing conveyer 301), in energy storage bed
Filled stone matter or ceramic heat-storing material (include: the porous regenerator bed 12 of the first regenerative chamber and the porous regenerator bed of the second regenerative chamber
22)。
When accumulation of heat regenerative oxidator 1 starts, three-dimensional by-passing valve 102 is first closed, the property of will volatilize organic chemistry exhaust gas 100 passes through
Volatile organic chemical exhaust gas bypass pipeline 103 is oriented to volatile organic chemical exhaust gas bypass discharge outlet 150；Open air valve
106, by the air 210 in air line 211, accumulation of heat regenerative oxidator 1 is sent into through regenerative chamber gas feeding pipe 108；Then it opens
Dynamic combustor 60 adjusts control both air flow modulation by combustion completion controller 300 using 301 signal of temperature sensing conveyer
Valve 212 and auxiliary fuel flow control valve 202 send auxiliary fuel 200 to combustor 30 through auxiliary fuel supply line 201；
High-temperature oxydation reaction chamber 50 is first warming up to operation temperature Tc, then restart three-dimensional by-passing valve 102, the property of will volatilize organic chemistry
100 import system of exhaust gas.The volatile organic chemical exhaust gas 100 to be handled through volatile organic chemical exhaust gas gas feeding pipe 101,
It is controlled by three-dimensional by-passing valve 102, under normal operation, after flame retardant device 104 makees suitable protecting, enters gas through regenerative chamber
Pipeline 108；It first turns on the first regenerative chamber air inlet valve 110, close the first regenerative chamber exhaust valve 130, and close the second regenerative chamber
Air inlet valve 112 opens the second regenerative chamber exhaust valve 132, and VOCs exhaust gas is imported first through the first regenerative chamber gas feeding pipe 111 and is stored
Hot cell 10, gas initially enter the air inlet chamber 11 of the first regenerative chamber, and the porous regenerator bed 12 for being uniformly sent into the first regenerative chamber preheats
To certain temperature, it then is warming up to optimal reactive temperature using high-temperature oxydation room 50, the VOCs in exhaust gas containing VOCs is thorough
Bottom is destroyed, and thereafter, the sensible heat of high-temperature gas has been stored in original by the porous regenerator bed 22 that high-temperature gas passes through the second regenerative chamber
In the 22 accumulation of heat material of porous regenerator bed of the second cooling regenerative chamber；Gas after heat exchange, then enter gas through the second regenerative chamber
After room 21 mixes, with lower temperature through the second regenerative chamber exhaust pipe 133, flows to and be vented from the second regenerative chamber exhaust valve 132
Pipeline 144 is lured ejectment blower 145 to be drawn, and row flows to exhaust chimney 80 through tail gas exhausting pipe road 147 and discharges.To after a certain period of time,
Switch valve, the volatile organic chemical exhaust gas 100 for being intended to processing import this and have stored the second regenerative chamber of high breeding ground of energy
20 preheatings, high-temperature gas energy is then stored in the first regenerative chamber 10 after reaction, completes an operation circulation.This operational method is to close
First regenerative chamber air inlet valve 110 opens the first regenerative chamber exhaust valve 130, and opens the second regenerative chamber air inlet valve 112, closes the
VOCs exhaust gas is imported the second regenerative chamber 20 through the second regenerative chamber gas feeding pipe 113 by two regenerative chamber exhaust valves 132, and gas is first
Into the air inlet chamber 21 of the second regenerative chamber, after uniformly the porous regenerator bed 22 of the second regenerative chamber of feeding is preheated to certain temperature, so
It is warming up to optimal reactive temperature using high-temperature oxydation room 50 afterwards, the VOCs in exhaust gas containing VOCs is thoroughly destroyed；Thereafter, high temperature
The sensible heat of high-temperature gas is stored in former the first regenerative chamber cooled down by the porous regenerator bed 12 that gas passes through the first regenerative chamber
12 accumulation of heat material of porous regenerator bed in；Gas after heat exchange, then after the air inlet chamber 11 of the first regenerative chamber mixes, with lower
Temperature through the first regenerative chamber exhaust pipe 131, flow to exhaust pipe 144 from the first regenerative chamber exhaust valve 130, lured ejectment wind
Machine 145 is drawn, and row flows to exhaust chimney 80 through tail gas exhausting pipe road 147 and discharges.Although RTO has been widely used in various fields
On, but Utility routine be it is unexpected keep pouring in, overtemperature, be tempered, fire etc. it is unexpected, frequent occurrence.It chases after to find out its cause, being usually
Since front-end process disturbs, the quick change of VOC exhaust gas concentration and flow is caused, so that the high-temperature oxydation reaction chamber temperature of RTO
Caused by out of control.For example, 100 concentration of volatile organic chemical exhaust gas to be handled such as is more than former design concentration, when volatility has
Chemical machine exhaust gas 100 is controlled, through flame retardant device through volatile organic chemical exhaust gas gas feeding pipe 101 by three-dimensional by-passing valve 102
After 104 make suitable protecting, through regenerative chamber gas feeding pipe 108；The first accumulation of heat is imported via the first regenerative chamber air inlet valve 110 of unlatching
Room 10, after the porous regenerator bed 12 of the first regenerative chamber is preheated to certain temperature, being then sent to high-temperature oxydation room 50 will contain gas
VOCs in VOCs exhaust gas is thoroughly destroyed, at this point, gas reaches the second regenerative chamber 20 since VOCs exhaust gas concentration is higher than design value
Afterwards, the energy for being higher than former design value is also released simultaneously；Thereafter, high-temperature gas passes through the porous regenerator bed 22 of the second regenerative chamber
When the sensible heat of high-temperature gas being stored in the 22 accumulation of heat material of porous regenerator bed of former the second regenerative chamber cooled down, stored energy
Amount will be above former design value.To which after a certain period of time, switch valve, the volatile organic chemical exhaust gas 100 for being intended to processing, which imports, to be somebody's turn to do
The second regenerative chamber of high breeding ground 20 for having stored energy preheats, and high-temperature gas energy is then stored in the first regenerative chamber 10 after reaction,
Complete an operation circulation.VOCs exhaust gas imports the second regenerative chamber 20, porous regenerator bed 22 heat of the gas in the second regenerative chamber at this time
Exchange can obtain the energy for being higher than former design value, passed through high temperature oxidizing chamber 50 and aoxidized, and generate and be higher than setting value
Energy, so that the temperature of high-temperature oxydation room 50 edges up；Thereafter, high-temperature gas passes through the first regenerative chamber 10 and stores up more energy
There are in the 12 accumulation of heat material of porous regenerator bed of the first regenerative chamber；In this way, after VOCs exhaust gas concentration increases, the oxidation of accumulation of heat regenerative
The operation temperature of device 1 will be increased persistently, be even resulted in out of control.
In order to which the temperature moment overtemperature of high-temperature oxydation room when solving the problem of that VOC exhaust gas concentration increases causes system to jump vehicle,
United States Patent (USP) US5837205 is arranged in high-temperature oxydation reaction chamber 50 is open to the urgent bypass of atmosphere, when system once has generation
When the possibility of overtemperature situation, urgent bypass opening is just automatically turned on, by high-temperature gas direct emission, this technology is referred to as " heat
Bypass techniques "；This technology gives no thought to the industrial safety issues that may occur and pollution merely for equipment safety consideration
Object emission problem.This " hot bypass techniques ", in industrial circle practical application, production safety problem is continuous.When system operatio is super
Wen Shi, the high-temperature gas for opening heat bypass moment discharge can often ignite VOCs exhaust gas, cause serious production safety unexpected, explosion
There is what is heard when event.
Taiwan patent of invention I 504844 and I 448657, Chinese invention patent ZL 2,012 1 0143533.6 and ZL
2012 1 0549700.5 are the exhaust gas containing VOCs for being higher than LEL or more for concentration, using being mounted on high-temperature oxydation reaction chamber
50 high temperature pulse wave reactor (PDR) is handled, and recycles the energy using heat recovery boiler, and safe solves concentration
The processing of VOC exhaust gas higher than LEL or more.Also higher for concentration but to be below LEL hereinafter, and dense that is, according to the above analysis
Degree and flow can lead to the problem of the processing of the fast-changing exhaust gas containing VOCs, and industrial circle still can be with without safe and reliable method so far
It solves.Cause the accumulation of heat regenerative oxidator (RTO) of industry to be easy to produce the application of variation in concentration, still often meets with super
Temperature predicament out of control.
The high-efficient energy recovery of accumulation of heat regenerative oxidator (RTO) is its advantage, but due to industries such as petrochemical industry, chemical industry
Exhaust gas containing VOCs typically, it is characterized in that concentration quickly changes, flow quickly changes；It is aoxidized using traditional accumulation of heat regenerative
Overtemperature puzzlement out of control often occurs for device (RTO), even generate the accident that overtemperature fires.If VOCs concentration is higher, excess energy
Accumulation of heat regenerative oxidator (RTO) can not be effectively discharged in amount, and can not effectively control the operation temperature of high-temperature oxydation reaction chamber,
RTO is the risk for having temperature control or generation to fire.In recent years, it is quick-fried that a lot of accumulation of heat regenerative oxidators (RTO) occur in the world
Case that is fried or destroying by fire, mainly i.e. inducement will be in will accidentally contain high concentration VOCs exhaust gas importing accumulation of heat regenerative oxidator (RTO), in sky
In the case of gas supply is adjusted improperly, generation fires (Deflagration) or detonation (Detonation) phenomenon or overtemperature operation
Catalyst is caused to be damaged.Therefore, existing accumulation of heat regenerative oxidator technology is improved, VOCs burning can effectively be controlled by creating one
The method and apparatus of the energy released is an object of the present invention.
Summary of the invention
The main object of the present invention is to provide for a kind of accumulation of heat regenerative oxidator that can handle VOCs exhaust gas, feature
It is that the cold bypass express passway of regenerative chamber and valve are equipped in regenerative chamber, via high-temperature oxydation reaction chamber overtemperature logic controller control
Air flow rate adjustment valve aperture processed allows part VOCs exhaust gas quickly logical via the cold bypass of the lower regenerative chamber of heat exchange efficiency
Road enters high-temperature oxydation reaction chamber with lower temperature, to inhibit because of problem of temperature rise caused by the variation of VOCs concentration, remains high
Warm oxidation reaction chamber can control in reasonable temperature range, maintains catalyst activity, thoroughly solves accumulation of heat regenerative oxidator
(RTO) the high-temperature oxydation reaction chamber overtemperatute that VOC exhaust gas concentration transfinites.
The solution of this overtemperatute is analyzed, it can be from the spy of traditional accumulation of heat regenerative oxidator (RTO) of Fig. 1
Sign, Lai Sikao solution.The heat recovery rate of accumulation of heat regenerative oxidator, is commonly defined as:
R=(Tc-To)/(Tc-Ti) x 100% (1)
Wherein Tc(i.e. for maximum gas temperature in the high-temperature oxydation reaction chamber 50 of accumulation of heat regenerative oxidator or operation temperature
Highest oxidation temperature), ToTemperature is exported for accumulation of heat regenerative oxidator (i.e. regenerative oxidizer) exhaust pipe 144
Degree, TiFor the volatile organic chemical exhaust gas 100 to be handled regenerative chamber gas feeding pipe 108 inlet temperature.If if Tc、To、Ti
Respectively 850 DEG C, 90 DEG C, 50 DEG C, then
R=(850-90)/(850-50) x 100%=95%
The meaning as representated by upper calculated example is accumulation of heat regenerative oxidator (RTO) if the energy recovery efficiency of itself is set
It is calculated as 95%, it is only necessary to energy be provided, the temperature of the exhaust gas containing volatile organic chemical to be handled 100 is enabled to improve 40 DEG C of (To-Ti
=90-50=40 DEG C) VOCs in gas can be aoxidized.It is waved in general, handling to contain with accumulation of heat regenerative oxidator (RTO)
The concentration of hair property organic chemistry exhaust gas 100 is greater than 1,500mg/m3Useless exhaust (being equivalent to general VOC about 500ppmv), in addition to
Combustor 60 needs other than auxiliary fuel when starting；Volatile organic when normal operating, in volatile organic chemical exhaust gas 100
Ingredient oxidation, provided heat are just sufficient for energy required for RTO system stable operation, normal operating i.e. without using
Auxiliary fuel or electric heating.The advantages of this is RTO still, and constitutes RTO in petrochemical industry, chemical industry in use, facing in operation
Difficult significant drawback；If the concentration moment of VOCs exhaust gas increases, 50 temperature of high-temperature oxydation reaction chamber of RTO will rise sharply；
It is design value or more and continues for some time if the concentration of VOCs exhaust gas increases, 50 temperature of high-temperature oxydation reaction chamber of RTO will
Persistently overheating, even result in it is out of control.
For example, it is assumed that the design equilibrium concentration of accumulation of heat regenerative oxidator 1 is Co, that is, when the concentration of VOCs exhaust gas is Co
When, accumulation of heat regenerative oxidator 1 can be not necessarily to auxiliary fuel in temperature Tc with stable operation.When volatile organic chemical exhaust gas 100
Concentration be lower than Co when, high-temperature oxydation reaction chamber 50 need via combustor 60 add fuel, operation temperature could be maintained.When waving
When the concentration of hair property organic chemistry exhaust gas 100 is higher than Co, the operation temperature of high-temperature oxydation reaction chamber 50 will be cumulative.Utilize this hair
Bright design, allow part volatile organic chemical exhaust gas via cold bypass express passway (such as: the cold bypass of the first regenerative chamber is quick
Channel 125 or the cold bypass express passway 127 of the second regenerative chamber) flow into high-temperature oxydation reaction chamber 50, it is assumed that and the gas flow, which accounts for, to be waved
The α times of volume ratio (α < 1) of the total flow of hair property organic chemistry exhaust gas 100, and the use regenerative capacity of cold bypass express passway
Low or low specific heat accumulation of heat material, so that the gas energy recycling ratio through supercooling bypass express passway is β times of normal energy storage bed
(β < 1), that is, the gas heating Δ T through supercooling bypass express passwaysIt is Δ T to pass through the gas heating of normal energy storage bediβ
Times (β < 1), that is, Δ Ts=β Δ Ti；Then volatile organic chemical exhaust gas 100 flows through the cold ratio α for bypassing express passway and contains
VOCs gas concentration is stored with ratio C/Co of balanced design concentration, the operation temperature Tc of high-temperature oxydation reaction chamber 50 and by normal
The gas heating Δ T of hott bediRatio and energy regenerating ratio beta relationship, can indicate are as follows:
For example, if Tc, To, Ti for setting accumulation of heat regenerative oxidator (RTO) are respectively 850 DEG C, 90 DEG C, 50 DEG C, itself
Energy recovery efficiency according to equation (1) be R=(Tc-To)/(Tc-Ti) × 100%=(850-90)/(850-50) ×
100%=95%.Assuming that the design of cold bypass express passway is so that energy recovery efficiency only has 20%, then β=20%/90%=
2/9；ΔTi=90-50=40 DEG C；Assume the concentration preliminary design of volatile organic chemical exhaust gas 100 at can at most allow again
Increase 100%, C/C0=2；When the cold bypass express passway of design then can be estimated according to equation (2), the gas flow of consideration
Ratio, α is as follows:
As long as also that is, preparing the cold bypass express passway of 6.35% flow, so that it may the behaviour of effective adjustment control system
Make, allow the operation temperature of high-temperature oxydation reaction chamber 50 in the variation of VOCs exhaust gas concentration, remains to effectively control steady
Fixed setting operation temperature.Therefore, the design side of the cold bypass express passway of VOCs exhaust gas is added inside regenerative chamber using this
Case can allow accumulation of heat regenerative oxidator to change in face of the concentration of VOCs exhaust gas, be controlled effectively, further increase accumulation of heat
The operational safety of regenerative oxidator.
Detailed description of the invention
To make to have the present invention preferable understanding, it is special with regard to for following schemes as a preferred embodiment explanation of the invention
It is as follows.
Fig. 1: traditional accumulation of heat regenerative oxidator；
Fig. 2: the embodiment of two slot type accumulation of heat regenerative oxidators of the invention；
Fig. 3: the embodiment of three slot type accumulation of heat regenerative oxidators of the invention；
Fig. 4: the flow area ratio (α) of express passway and the relationship of concentration changing ratio (C/Co)；
Fig. 5: the flow area ratio (α) of express passway and the relationship of concentration changing ratio (C/Co).
Appended drawing reference is as follows:
1 accumulation of heat regenerative oxidator
10 first regenerative chambers
The air inlet chamber of 11 first regenerative chambers
The porous regenerator bed of 12 first regenerative chambers
20 second regenerative chambers
The air inlet chamber of 21 second regenerative chambers
The porous regenerator bed of 22 second regenerative chambers
30 third regenerative chambers
The air inlet chamber of 31 third regenerative chambers
The porous regenerator bed of 32 third regenerative chambers
50 high-temperature oxydation reaction chambers
60 combustors
70 combustors
80 exhaust chimneys
100 volatile organic chemical exhaust gas
101 volatile organic chemical exhaust gas gas feeding pipes
102 three-dimensional by-passing valves
103 volatile organic chemical exhaust gas bypass pipelines
104 flame retardant devices
106 air valves
107 bypath air pipelines
108 regenerative chamber gas feeding pipes
110 first regenerative chamber air inlet valves
111 first regenerative chamber gas feeding pipes
112 second regenerative chamber air inlet valves
113 second regenerative chamber gas feeding pipes
114 third regenerative chamber air inlet valves
115 third regenerative chamber gas feeding pipes
The cold bypass express passway flow control valve of 124 first regenerative chambers
The cold bypass express passway of 125 first regenerative chambers
The cold bypass express passway flow control valve of 126 second regenerative chambers
The cold bypass express passway of 127 second regenerative chambers
The cold bypass express passway flow control valve of 128 third regenerative chambers
The cold bypass express passway of 129 third regenerative chambers
130 first regenerative chamber exhaust valves
131 first regenerative chamber exhaust pipes
132 second regenerative chamber exhaust valves
133 second regenerative chamber exhaust pipes
134 third regenerative chamber exhaust valves
135 third regenerative chamber exhaust pipes
144 exhaust pipes
145 lure ejectment blower
147 tail gas exhausting pipe roads
150 volatile organic chemical exhaust gas bypass discharge outlets
160 first regenerative chamber backwash valves
161 first regenerative chamber backwash pipelines
162 second regenerative chamber backwash valves
163 second regenerative chamber backwash pipelines
164 third regenerative chamber backwash valves
165 third regenerative chamber backwash pipelines
166 backwash windmills
167 backwash pipelines
200 auxiliary fuels
201 auxiliary fuel supply lines
202 auxiliary fuel flow control valves
210 air
211 air lines
212 air flow rate adjustment valves
300 combustion completion controllers
301 temperature sensing conveyers
320 high-temperature oxydation reaction chamber overtemperature logic controllers
321 high-temperature oxydation reaction chamber overheat controllers
Specific embodiment
For up to above-mentioned effect, the present invention provides a kind of accumulation of heat regenerative oxidator 1 that can handle VOC exhaust gas, wherein contains
There are at least two or more regenerative chambers, a high-temperature oxydation reaction chamber and high-temperature oxydation reaction chamber overtemperature logic controllers, wherein
The porous regenerator bed for thering is porous material to be piled into regenerative chamber, high-temperature oxydation reaction chamber be located above regenerative chamber and with regenerative chamber knot
It closes, and there is partially porous material to constitute inside regenerative chamber using the material that porosity is big, thermal capacity is low in the porous regenerator bed
Cold bypass express passway, and regenerative chamber it is cold bypass express passway be equipped with temperature automatic control flow control valve and high temperature oxygen
Change reaction chamber overtemperature logic controller；Waste gas containing VOC is imported into accumulation of heat regenerative oxidator, at preheating, high-temperature oxydation
Reason；When VOC exhaust gas concentration is more than limit value, the storage of temperature automatic control is utilized by high-temperature oxydation reaction chamber overtemperature logic controller
The cold bypass express passway flow control valve leader VOC exhaust gas in hot cell is via the cold bypass express passway of regenerative chamber, with lower
Heat recovery efficiency maintains to enter high-temperature oxydation reaction chamber compared with low-temperature condition, adjusts the operation temperature of control high-temperature oxydation reaction chamber,
It is unexpected that overtemperature occurs to avoid system.
As one embodiment of the invention, please refer to shown in Fig. 2.One embodiment of the invention includes: one
Accumulation of heat regenerative oxidator 1 (RTO), inside include at least two regenerative chambers (the first regenerative chamber 10, the second regenerative chamber 20), two groups
(the cold bypass express passway 125 of the first regenerative chamber, the second regenerative chamber are cold for the cold bypass express passway of regenerative chamber inside regenerative chamber
Bypass express passway 127), two groups of air inlets control equipment (the first regenerative chamber air inlet valve 110, the second regenerative chamber air inlet valves 112), two
Group outlet control equipment (the first regenerative chamber exhaust valve 130, the second regenerative chamber exhaust valve 132), at least one set of heating equipment (burning
Machine 60, auxiliary fuel supply line 201, auxiliary fuel flow control valve 202, air flow rate adjustment valve 212) and high-temperature oxydation it is anti-
Answer the Temperature-controlled appliance (combustion completion controller 300, temperature sensing conveyer 301) of room 50, the porous regenerator bed of regenerative chamber
Interior filled stone matter or ceramic heat-storing material.When accumulation of heat regenerative oxidator 1 starts, three-dimensional by-passing valve 102, the property of will volatilize first are closed
Organic chemistry exhaust gas 100 is oriented to the discharge of volatile organic chemical exhaust gas bypass through volatile organic chemical exhaust gas bypass pipeline 103
Mouth 150；Air valve 106 is opened, by the air 210 in air line 211, is sent into accumulation of heat regeneration through regenerative chamber gas feeding pipe 108
Type oxidator 1 starts combustor 60, using 301 signal of temperature sensing conveyer, is adjusted and is controlled by combustion completion controller 300
Air flow rate adjustment valve 212 and auxiliary fuel flow control valve 202 send auxiliary fuel 200 through auxiliary fuel supply line 201
Heating by ignition is carried out to combustor 30；High-temperature oxydation reaction chamber 50 is first warming up to operation temperature (Tc).Restart three-dimensional bypass
Valve 102,100 import system of the property of will volatilize organic chemistry exhaust gas.The volatile organic chemical exhaust gas 100 to be handled has through volatility
Chemical machine exhaust gas gas feeding pipe 101, is controlled by three-dimensional by-passing valve 102, under normal operation, is made through flame retardant device 104
After suitable protecting, through regenerative chamber gas feeding pipe 108；It first turns on the first regenerative chamber air inlet valve 110, close the exhaust of the first regenerative chamber
Valve 130, and close the second regenerative chamber air inlet valve 112, open the second regenerative chamber exhaust valve 132, by VOCs exhaust gas through the first accumulation of heat
Room gas feeding pipe 111 imports the first regenerative chamber 10, and gas initially enters the air inlet chamber 11 of the first regenerative chamber, is uniformly sent into first and stores
After the porous regenerator bed 12 in hot cell is preheated to certain temperature, it is warming up to optimal reactive temperature using high-temperature oxydation room 50, will be contained
VOCs in VOCs exhaust gas is thoroughly destroyed；Then, high-temperature gas passes through the porous regenerator bed 22 of the second regenerative chamber for High Temperature Gas
The sensible heat of body is stored in the 22 accumulation of heat material of porous regenerator bed of former the second regenerative chamber cooled down；Gas after heat exchange, then
After the air inlet chamber 21 of the second regenerative chamber mixes, with lower temperature through the second regenerative chamber exhaust pipe 133, from the second regenerative chamber
Exhaust valve 132 flows to exhaust pipe 144, and ejectment blower 145 is lured to be drawn, and row flows to exhaust chimney 80 through tail gas exhausting pipe road 147
Discharge.During this, it is assumed for example that the design equilibrium concentration of accumulation of heat regenerative oxidator 1 is Co=1500ppm, that is, is worked as
When the concentration of VOCs exhaust gas is Co=1500ppm, accumulation of heat regenerative oxidator 1 can be with stable operation in Tc=850 DEG C of nothing of temperature
Need auxiliary fuel.It is high when the concentration of volatile organic chemical exhaust gas 100 is 500~1500ppm (being lower than Co=1500ppm)
Warm oxidation reaction chamber 50 needs to add fuel via combustor 60, could maintain operation temperature.Such as work as volatile organic chemical
When the concentration of exhaust gas 100 reaches 3000ppm (be higher than Co=1500ppm), the operation temperature of high-temperature oxydation reaction chamber 50 will be because
It is more than design value for the concentration of volatile organic chemical exhaust gas 100, and makes the increasing temperature of high-temperature oxydation reaction chamber 50.It utilizes
Design of the invention, after system temperature is more than setting value, high-temperature oxydation reaction chamber overtemperature logic controller 320 can start actuation
The cold bypass express passway flow control valve 124 of the first regenerative chamber is opened, part volatile organic chemical exhaust gas is allowed to store via first
The cold bypass express passway 125 in hot cell flows into high-temperature oxydation reaction chamber 50, the volume of the total flow of volatile organic chemical exhaust gas 100
Ratio α value can use equation (2) and estimate.Assuming that it is cold bypass express passway using the accumulation of heat that regenerative capacity is low or specific heat is low
Material so that the gas energy recycling ratio through supercooling bypass express passway be normal energy storage bed β times (β < 1, such as β=
0.25) the gas heating Δ T of express passway, that is, through supercooling is bypassedsIt is Δ T to pass through the gas heating of normal energy storage bediβ
Times (β < 1), that is, Δ Ts=β Δ Ti=0.25 Δ Ti；Tc, To, Ti of accumulation of heat regenerative oxidator 1 (RTO) are respectively 850
DEG C, 90 DEG C, 50 DEG C, if the energy recovery efficiency of itself is designed as 95%.ΔTi=90-50=40 DEG C；Then volatility is organic
The VOCs exhaust gas fraction α that chemical exhaust 100 flows through the cold bypass express passway 125 of the first regenerative chamber can use equation (2) and push away
Estimate are as follows:
As long as also that is, there is the VOCs exhaust gas of 6.58% flow to flow through the cold bypass express passway 125 of the first regenerative chamber, so that it may
Effectively adjustment system operating temperature allows the operation temperature of high-temperature oxydation reaction chamber 50 in the variation of VOCs exhaust gas concentration,
It remains to effectively control in former setting operation temperature.In this example, the cold bypass express passway 125 of the first regenerative chamber provide compared with
Low heat exchange efficiency gives VOCs exhaust gas, enables part VOCs exhaust gas to enter high-temperature oxydation reaction chamber 50 with lower temperature, reaches
To the purpose for the operation temperature for adjusting control high-temperature oxydation reaction chamber 50；The combustion discharged due to volatile organic chemical exhaust gas 100
Excess energy can also be released via the oxidation reaction of high-temperature oxydation reaction chamber 50 by heating value；At this point, accumulation of heat regenerative oxygen
It is quickly logical also to adjust the cold bypass of the second regenerative chamber of control simultaneously for the high-temperature oxydation reaction chamber overtemperature logic controller 320 for changing device 1
The aperture in road 127, effectively excess energy is discharged.To which after a certain period of time, switch valve is intended to the volatile organic of processing
It learns exhaust gas 100 and imports second regenerative chamber of high breeding ground 20 for having stored energy preheating, high-temperature gas energy then stores after reaction
In the first regenerative chamber 10, an operation circulation is completed.This operational method is to close the first regenerative chamber air inlet valve 110, open the first storage
Hot cell exhaust valve 130, and open the second regenerative chamber air inlet valve 112, close the second regenerative chamber exhaust valve 132, VOCs exhaust gas is passed through
Second regenerative chamber gas feeding pipe 113 imports the second regenerative chamber 20, and gas initially enters the air inlet chamber 21 of the second regenerative chamber, uniformly send
Into the second regenerative chamber porous regenerator bed 22 be preheated to certain temperature after, then using high-temperature oxydation reaction chamber overtemperature logic control
Device 320 processed adjusts the cold bypass express passway 127 of the second regenerative chamber of control and the cold bypass express passway 125 of the first regenerative chamber, effectively
Control high-temperature oxydation room 50 operate in most suitable catalytic reaction temperature, the VOCs in exhaust gas containing VOCs is thoroughly destroyed；Thereafter, high
The sensible heat of high-temperature gas is stored in former the first accumulation of heat cooled down by the porous regenerator bed 12 that wet body passes through the first regenerative chamber
In the 12 accumulation of heat material of porous regenerator bed of room；Gas after heat exchange, then through the first regenerative chamber air inlet chamber 11 mix after, with compared with
Low temperature flows to exhaust pipe 144 through the first regenerative chamber exhaust pipe 131, from the first regenerative chamber exhaust valve 130, through luring ejectment
Blower 145 is drawn, and row flows to exhaust chimney 80 through tail gas exhausting pipe road 147 and discharges.
As second embodiment of the invention, please refer to shown in Fig. 3.Second embodiment of the invention includes: one
A accumulation of heat regenerative oxidator 1 (RTO) with three slot types, inside include at least three regenerative chamber (the first regenerative chambers 10, second
Regenerative chamber 20, third regenerative chamber 30), three groups be located at regenerative chamber inside the cold bypass express passways of regenerative chamber (the first regenerative chamber is cold
Bypass express passway 125, the cold bypass express passway 127 of the second regenerative chamber, the cold bypass express passway 129 of third regenerative chamber), three groups
Air inlet controls equipment (the first regenerative chamber air inlet valve 110, the second regenerative chamber air inlet valve 112, third regenerative chamber air inlet valve 114), three
Group outlet control equipment (the first regenerative chamber exhaust valve 130, the second regenerative chamber exhaust valve 132, third regenerative chamber exhaust valve 134),
At least one set of heating equipment (combustor 60, combustor 70, auxiliary fuel supply line 201, auxiliary fuel flow control valve 202,
Air flow rate adjustment valve 212) and high-temperature oxydation reaction chamber 50 Temperature-controlled appliance (combustion completion controller 300, temperature sensing
Conveyer 301), filled stone matter or ceramic heat-storing material in the porous regenerator bed of regenerative chamber.Three slot type accumulation of heat regenerative oxidators 1
When operation, have a regenerative chamber as air inlet chamber, a regenerative chamber as discharge chamber, a regenerative chamber as backwash room；To keep away
Exempt from regenerative chamber switching when, caused by short time pollution condition.As the regenerative chamber of backwash room, backwash flow is about normal operating stream
The 1/5~1/10 of amount, the backwash time about 20 seconds or more.When three slot type accumulation of heat regenerative oxidators 1 operate, following three can be divided into
A operative combination controls the open and close of corresponding valve according to timing or outlet temperature.(1) one into three goes out two backwashes, and (first stores
10 air inlet of hot cell, 20 backwash of the second regenerative chamber, 30 outlet of third regenerative chamber)；(2) three into two go out a backwash (the first regenerative chamber 10
Backwash, 20 outlet of the second regenerative chamber, 30 air inlet of third regenerative chamber)；And (3) two into one go out three backwashes (10 outlet of the first regenerative chamber,
Second regenerative chamber, 20 air inlet, 30 backwash of third regenerative chamber).
When the operation starting of three slot type accumulation of heat regenerative oxidators 1, three-dimensional by-passing valve 102 is first closed, the property of will volatilize organises
It learns exhaust gas 100 and is oriented to volatile organic chemical exhaust gas bypass discharge outlet 150 through volatile organic chemical exhaust gas bypass pipeline 103；
Air valve 106 is opened, by the air 210 in air line 211, is sent into the oxidation of accumulation of heat regenerative through regenerative chamber gas feeding pipe 108
Device 1, starts combustor 60 and combustor 70 is adjusted using 301 signal of temperature sensing conveyer by combustion completion controller 300
Air flow rate adjustment valve 212 and auxiliary fuel flow control valve 202 are controlled, by auxiliary fuel 200 through auxiliary fuel supply line
201 send to combustor 60 and the progress heating by ignition of combustor 70；High-temperature oxydation reaction chamber 50 is first warming up to operation temperature (Tc).
Restart three-dimensional by-passing valve 102,100 import system of the property of will volatilize organic chemistry exhaust gas.The volatile organic chemical to be handled is useless
Gas 100 is controlled through volatile organic chemical exhaust gas gas feeding pipe 101 by three-dimensional by-passing valve 102, under normal operation, warp
After flame retardant device 104 makees suitable protecting, through regenerative chamber gas feeding pipe 108, it is sent into RTO processing.
One into three goes out two backwashes
It is anti-to first turn on the first regenerative chamber air inlet valve 110, the first regenerative chamber exhaust valve 130 of closing, the first regenerative chamber of closing
Valve 160 is washed, it is anti-to simultaneously close off the second regenerative chamber air inlet valve 112, the second regenerative chamber exhaust valve 132 of closing, the second regenerative chamber of unlatching
Valve 162 is washed, and closes third regenerative chamber air inlet valve 114, opens third regenerative chamber exhaust valve 134, closes the backwash of third regenerative chamber
VOCs exhaust gas is imported the first regenerative chamber 10 through the first regenerative chamber gas feeding pipe 111 by valve 164, and gas initially enters the first accumulation of heat
The air inlet chamber 11 of room, after uniformly the porous regenerator bed 12 of the first regenerative chamber of feeding is preheated to certain temperature, then using high temperature
Oxidizing chamber 50, which is adjusted, arrives optimal reactive temperature, and the VOCs in exhaust gas containing VOCs is thoroughly destroyed；Thereafter, high-temperature gas passes through
The sensible heat of high-temperature gas is stored in the porous regenerator bed of the former third regenerative chamber cooled down by the porous regenerator bed 32 of three regenerative chambers
In 32 accumulation of heat materials；Gas after heat exchange, then after the air inlet chamber 31 of third regenerative chamber mixes, with lower temperature through third
Regenerative chamber exhaust pipe 135 flows to exhaust pipe 144 from third regenerative chamber exhaust valve 134, ejectment blower 145 is lured to be drawn, row
Exhaust chimney 80 is flowed to through tail gas exhausting pipe road 147 to discharge.Meanwhile micro clean combustion product will be backwashed windmill 166 and be drawn,
By 20 backwash of the second regenerative chamber, gas flows through backwash wind through the second regenerative chamber backwash valve 162, the second regenerative chamber backwash pipeline 163
Vehicle 166, then through backwash pipeline 167, send regenerative chamber gas feeding pipe 108 back to；By the second regenerative chamber 20 backwash it is clean after, then can be with
Outlet regenerative chamber as next circulation " three into two go out a backwash " uses.During this, it is assumed for example that accumulation of heat regenerative
The design equilibrium concentration of oxidator 1 is Co=1500ppm, that is, when the concentration of VOCs exhaust gas is Co=1500ppm, accumulation of heat is again
Raw type oxidator 1 can be not necessarily to auxiliary fuel at Tc=850 DEG C of temperature with stable operation.When volatile organic chemical exhaust gas 100
When concentration is 500~1500ppm (being lower than Co=1500ppm), high-temperature oxydation reaction chamber 50 is needed via combustor 60 and burning
Machine 70 adds fuel, could maintain operation temperature.Such as when the concentration of volatile organic chemical exhaust gas 100 reaches 3000ppm (height
In Co=1500ppm) when, the operation temperature of high-temperature oxydation reaction chamber 50 will be because of the dense of volatile organic chemical exhaust gas 100
Degree is more than design value, and makes the increasing temperature of high-temperature oxydation reaction chamber 50.Using design of the invention, when system temperature is more than
After setting value, it is quickly logical that high-temperature oxydation reaction chamber overtemperature logic controller 320 can start the cold bypass of actuation the first regenerative chamber of unlatching
Road flow control valve 124 allows part volatile organic chemical exhaust gas to flow into height via the cold bypass express passway 125 of the first regenerative chamber
Warm oxidation reaction chamber 50, the volume ratio α value of the total flow of volatile organic chemical exhaust gas 100 can use equation (2) and push away
Estimate.Assuming that it is cold bypass express passway using the accumulation of heat material that regenerative capacity is low or specific heat is low so that through supercooling bypass express passway
Gas energy recycling ratio be normal energy storage bed β times (β < 1, such as β=0.25), that is, through supercooling bypass express passway
Gas heating Δ TsIt is Δ T to pass through the gas heating of normal energy storage bediβ times (β < 1), that is, Δ Ts=β Δ Ti=
0.25ΔTi；Tc, To, Ti of accumulation of heat regenerative oxidator 1 (RTO) are respectively 850 DEG C, 90 DEG C, 50 DEG C, the energy recovery of itself
If efficiency is designed as 95%.ΔTi=90-50=40 DEG C；Then it is cold to flow through the first regenerative chamber for volatile organic chemical exhaust gas 100
Bypass express passway 125 VOCs exhaust gas fraction α can use equation (2) estimate for
As long as also that is, there is the VOCs exhaust gas of 6.58% flow to flow through the cold bypass express passway 125 of the first regenerative chamber, so that it may
Effectively adjustment system operating temperature allows the operation temperature of high-temperature oxydation reaction chamber 50 in the variation of VOCs exhaust gas concentration,
It remains to effectively control in former setting operation temperature.In this example, the cold bypass express passway 125 of the first regenerative chamber provide compared with
Low heat exchange efficiency gives VOCs exhaust gas, enables part VOCs exhaust gas to enter high-temperature oxydation reaction chamber 50 with lower temperature, reaches
To the purpose for the operation temperature for adjusting control high-temperature oxydation reaction chamber 50；The combustion discharged due to volatile organic chemical exhaust gas 100
Excess energy can also be released via the oxidation reaction of high-temperature oxydation reaction chamber 50 by heating value；At this point, accumulation of heat regenerative oxygen
It is quickly logical also to adjust the cold bypass of control third regenerative chamber simultaneously for the high-temperature oxydation reaction chamber overtemperature logic controller 320 for changing device 1
The aperture in road 129, effectively excess energy is discharged.
Three into two go out a backwash
To which after a certain period of time, switch valve, the volatile organic chemical exhaust gas 100 for being intended to processing imports this and stored energy
High breeding ground third regenerative chamber 30 preheating of amount, high-temperature gas energy is then stored in the first regenerative chamber 10 after reaction, completes " three into two
The operation circulation of a backwash out ".This operational method is to close the first regenerative chamber air inlet valve 110, close the first regenerative chamber exhaust valve
130, the first regenerative chamber backwash valve 160 is opened, and closes the second regenerative chamber air inlet valve 112, open the second regenerative chamber exhaust valve
132, close the second regenerative chamber backwash valve 162, open third regenerative chamber air inlet valve 114, close third regenerative chamber exhaust valve 134,
Third regenerative chamber backwash valve 164 is closed, VOCs exhaust gas is imported into third regenerative chamber 30, gas through third regenerative chamber gas feeding pipe 115
Body initially enters the air inlet chamber 31 of third regenerative chamber, and the porous regenerator bed 32 for being uniformly sent into third regenerative chamber is preheated to certain temperature
Afterwards, the control cold bypass express passway of third regenerative chamber then is adjusted using high-temperature oxydation reaction chamber overtemperature logic controller 320
129, the cold bypass express passway 127 of the second regenerative chamber and the cold bypass express passway 125 of the first regenerative chamber, effectively control high temperature oxygen
Change the operation of room 50 in optimal reactive temperature, the VOCs in exhaust gas containing VOCs is thoroughly destroyed；Thereafter, high-temperature gas passes through second
The sensible heat of high-temperature gas is stored in the porous regenerator bed 22 of former the second regenerative chamber cooled down by the porous regenerator bed 22 of regenerative chamber
In accumulation of heat material；Gas after heat exchange, then after the air inlet chamber 21 of the second regenerative chamber mixes, stored with lower temperature through second
Hot cell exhaust pipe 133 flows to exhaust pipe 144 from the second regenerative chamber exhaust valve 132, ejectment blower 145 is lured to be drawn, row's warp
Tail gas exhausting pipe road 147 flows to the discharge of exhaust chimney 80.Meanwhile micro clean combustion product will be backwashed windmill 166 and be drawn, it will
First regenerative chamber, 10 backwash, gas flow through backwash windmill through the first regenerative chamber backwash valve 160, the first regenerative chamber backwash pipeline 161
166, then through backwash pipeline 167, send regenerative chamber gas feeding pipe 108 back to；After the 10 backwash cleaning of the first regenerative chamber, can then it make
Outlet regenerative chamber for next circulation " two into one go out three backwashes " uses.In this example, the cold bypass of third regenerative chamber is quick
Channel 129 provides lower heat exchange efficiency and gives VOCs exhaust gas, and part VOCs exhaust gas is enabled to enter high temperature with lower temperature
Oxidation reaction chamber 50 achievees the purpose that the operation temperature for adjusting control high-temperature oxydation reaction chamber 50；Due to volatile organic chemical
The combustion heat value that exhaust gas 100 discharges can also release excess energy via the oxidation reaction of high-temperature oxydation reaction chamber 50；This
When, the high-temperature oxydation reaction chamber overtemperature logic controller 320 of accumulation of heat regenerative oxidator 1 can also adjust control second simultaneously and store
The aperture of the cold bypass express passway 127 in hot cell, effectively excess energy is discharged.
Two into one go out three backwashes
To which after a certain period of time, switch valve, the volatile organic chemical exhaust gas 100 for being intended to processing imports this and stored energy
The second regenerative chamber of high breeding ground 20 of amount preheats, and high-temperature gas energy is then stored in the first regenerative chamber 10 after reaction, completes " two into one
The operation circulation of three backwash out ".This operational method is to close the first regenerative chamber air inlet valve 110, open the first regenerative chamber exhaust valve
130, the first regenerative chamber backwash valve 160 is closed, and opens the second regenerative chamber air inlet valve 112, close the second regenerative chamber exhaust valve
132, close the second regenerative chamber backwash valve 162, close third regenerative chamber air inlet valve 114, close third regenerative chamber exhaust valve 134,
Third regenerative chamber backwash valve 164 is opened, VOCs exhaust gas is imported into the second regenerative chamber 20, gas through the second regenerative chamber gas feeding pipe 113
Body initially enters the air inlet chamber 21 of the second regenerative chamber, and the porous regenerator bed 22 for being uniformly sent into the second regenerative chamber is preheated to certain temperature
Afterwards, the control cold bypass express passway of the second regenerative chamber then is adjusted using high-temperature oxydation reaction chamber overtemperature logic controller 320
127, the cold bypass express passway 125 of the first regenerative chamber and the cold bypass express passway 129 of third regenerative chamber, effectively control high temperature oxygen
Change the operation of room 50 in optimal reactive temperature, the VOCs in exhaust gas containing VOCs is thoroughly destroyed；Thereafter, high-temperature gas passes through first
The sensible heat of high-temperature gas is stored in the porous regenerator bed 12 of former the first regenerative chamber cooled down by the porous regenerator bed 12 of regenerative chamber
In accumulation of heat material；Gas after heat exchange, then after the air inlet chamber 11 of the first regenerative chamber mixes, stored with lower temperature through first
Hot cell exhaust pipe 131 flows to exhaust pipe 144 from the first regenerative chamber exhaust valve 130, ejectment blower 145 is lured to be drawn, row's warp
Tail gas exhausting pipe road 147 flows to the discharge of exhaust chimney 80.Meanwhile micro clean combustion product will be backwashed windmill 166 and be drawn, it will
30 backwash of third regenerative chamber, gas flow through backwash windmill through third regenerative chamber backwash valve 164, third regenerative chamber backwash pipeline 165
166, then through backwash pipeline 167, send regenerative chamber gas feeding pipe 108 back to；After the 30 backwash cleaning of third regenerative chamber, can then it make
Outlet regenerative chamber for next circulation " one into three goes out two backwashes " uses.In this example, the cold bypass of the second regenerative chamber is quick
Channel 127 provides lower heat exchange efficiency and gives VOCs exhaust gas, and part VOCs exhaust gas is enabled to enter high temperature with lower temperature
Oxidation reaction chamber 50 achievees the purpose that the operation temperature for adjusting control high-temperature oxydation reaction chamber 50；Due to volatile organic chemical
The combustion heat value that exhaust gas 100 discharges also can be via the oxidation of high-temperature oxydation reaction chamber 50 and the porous catalyst bed 13 of the first regenerative chamber
Reaction releases excess energy；At this point, the high-temperature oxydation reaction chamber overtemperature logic controller of accumulation of heat regenerative oxidator 1
320, the aperture of the cold bypass express passway 125 of the first regenerative chamber of control can be also adjusted simultaneously, and effectively excess energy is discharged.This
Invention processing VOC exhaust gas accumulation of heat regenerative oxidator, be via Integration Design in regenerative chamber cold bypass express passway and
Flow control valve cooperates high-temperature oxydation reaction chamber overtemperature logic controller 320, is planned and is programmed using PLC, controls with combustion completion
Device 300 combines, and controls the cold bypass express passway flow control valve 124 of the first regenerative chamber, the second accumulation of heat with PID control mode tuning
The cold bypass express passway flow control valve 126 in room and the cold bypass express passway flow control valve 128 of third regenerative chamber are reached steady
Surely control high-temperature oxydation reaction chamber 50 operation temperature purpose, enable accumulation of heat regenerative oxidator 1 of the invention in response to
Industry VOCs exhaust gas control emission needs, and is higher than setting value for fast-changing VOCs exhaust gas concentration and speed, concentration
Applicable cases etc. can provide a brand-new and safe control tool.
Above-mentioned disclosed attached drawing, explanation, the processing VOCs exhaust gas of preferable two slot type only of the invention and three slot types
Accumulation of heat regenerative oxidator embodiment, be familiar with this those skilled in the art generally, according to made by this case scope modification, equivalent change
The variation such as change or increase heat storage tank number, should include in this case claim.
Fig. 4 and Fig. 5 is that VOCs exhaust gas flows through the ratio of cold bypass express passway or the flow area ratio (α) of express passway
With the relationship of concentration changing ratio (C/Co), wherein β is that the gas energy rate of recovery through supercooling bypass express passway is stored with normal
The gas energy rate of recovery ratio of hott bed.It is shown by Fig. 4, the material and structure design of cold bypass express passway determine β value, β value
The smaller ability in response to concentration variation is stronger.If system is wider in response to concentration variation range, accumulation of heat regenerative oxygen is designed
When changing device 1, the flow area ratio (α) of express passway just needs to increase.As shown in figure 5, working as the flow area ratio of express passway
When (α) is equal to 10%, if β value is designed as 0.1, accumulation of heat regenerative oxidator 1 increases in the variation of VOCs exhaust gas concentration up to 94%
When, stability contorting operation temperature is remained in former setting value.But when β value is designed as 0.3, then accumulation of heat regenerative oxidator 1 exists
When the variation of VOCs exhaust gas concentration increases by 73%, stability contorting operation temperature is remained in former setting value.High-temperature oxydation reaction chamber overtemperature
The optimization of arranging in pairs or groups of logic controller 320 controls programming technique, can allow the concentration of VOCs exhaust gas than increasing by 20% when, remain to allow storage
1 stability contorting operation temperature of heat regenerating type oxidator is following in the temperature high position warning of former setting value；For example, when express passway
When flow area ratio (α) is equal to 10%, if β value is designed as 0.1, accumulation of heat regenerative oxidator 1 becomes in VOCs exhaust gas concentration
Change when increasing up to 94% × 1.2=112.8%, such as former design VOCs exhaust gas concentration is 1500ppm, system operatio arrives
When 3192ppm, system remains to stability contorting operation.When β value is designed as 0.3, then accumulation of heat regenerative oxidator 1 is in VOCs exhaust gas
When concentration variation increases by 73% × 1.2=87.6%, such as former design VOCs exhaust gas concentration is 1500ppm, and system operatio arrives
When 2814ppm, system remains to stability contorting operation temperature in former setting value.
The material and structure design of cold bypass express passway determine the size of β value, for example, the porosity ε of porous material is got over
Greatly, effective aperture Dh is bigger and the specific heat Cp of material is smaller can all influence β value, so that β value is smaller, according to equation (2), fastly
The flow area ratio (α) in fast channel is inversely proportional with (1- β), the flow area ratio (α) of express passway required for β value is smaller
Also smaller.The material and structure design β value for being commonly designed selection are principle less than 0.5, and best less than 0.3 with β value.If using
Material of the hollow ceramic pipe as cold bypass express passway, β value levels off to zero, according to equation (2), the flow surface of express passway
Product ratio (α) is inversely proportional with (1- β), and the flow area ratio (α) of express passway required for β value is smaller is also smaller, therefore, makes
With hollow ceramic pipe, the flow area ratio (α) of required express passway is also minimum；But use hollow ceramic pipe as cold side
The material of logical express passway, design on material structure needs are specifically designed.
In conclusion the accumulation of heat regenerative oxidator of disclosed processing VOC exhaust gas, be in the past it is no,
And it can really reach the enhancement of effect, and have for industry applications.Above-mentioned disclosed attached drawing, explanation, it is only of the invention compared with
Good embodiment is familiar with this those skilled in the art generally, according to modification or equivalence changes made by this case scope, should be included in this
In case claim.
Claims (9)
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| CN114060830A (en) * | 2020-07-30 | 2022-02-18 | 华懋科技股份有限公司 | Energy-saving single-runner high-concentration cold-side bypass over-temperature control system and method thereof |
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