CN202973118U - Circulating fluidized bed incinerator for volatile organic gas - Google Patents
Circulating fluidized bed incinerator for volatile organic gas Download PDFInfo
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- CN202973118U CN202973118U CN 201220598216 CN201220598216U CN202973118U CN 202973118 U CN202973118 U CN 202973118U CN 201220598216 CN201220598216 CN 201220598216 CN 201220598216 U CN201220598216 U CN 201220598216U CN 202973118 U CN202973118 U CN 202973118U
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- fluidized bed
- burner hearth
- circulating fluidized
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- air
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Abstract
The utility model discloses a circulating fluidized bed incinerator for volatile organic gas, which comprises a hearth, an air chamber, a gas inlet, a separator, a tail flue and a returning pipe, wherein the air chamber is positioned at the bottom of the hearth; the gas inlet is formed in the middle part of the hearth; the separator is communicated with the top of the hearth and provided with a top outlet and a bottom outlet; the tail flue is communicated with the top outlet; the returning pipe is used for connecting the bottom outlet and the hearth; an air distributor is arranged between the bottom of the hearth and the air chamber; a fluidized blower is externally connected with the air chamber through a pipeline; and a layer of alumina hollow ball bed material is laid at the bottom of the hearth. According to the circulating fluidized bed incinerator for the volatile organic gas, alumina hollow balls are adopted as bed materials, so that the critical fluidized air speed of a circulating fluidized bed is reduced, the fluidized air flow is reduced, and the circulating fluidized bed incinerator has an energy saving effect. In addition, the volatile organic gas is incinerated at the temperature of 850 to 950 DEG C, 99.99% of combustion efficiency can be reached, and the goal of clean incineration and treatment is realized.
Description
Technical field
The utility model relates to a kind of circulating fluidized bed incinerator, relates in particular to a kind of circulating fluidized bed incinerator that burns volatile organic waste gas that cleans.
Background technology
Organic exhaust gas is the common pollutant of the industry dischargings such as petrochemical industry, light industry, plastics, printing, coating, often contain hydrocarbon compound, oxygen-containing organic compound, nitrogenous, sulphur, halogen and organic phosphorus compound etc. in organic exhaust gas, as VOCs such as benzene, toluene, styrene, polycyclic aromatic hydrocarbon (VOCs) etc.
Volatile organic waste gas is one of Air Pollutants, and is harmful, and the common symptom that causes is fatigue and weak, dizziness headache, n and V, nervous asthma, blood change etc., and the materials such as aldehyde, amine are foul smelling also.Volatile organic waste gas can also cause photochemical fog, causes secondary pollution.In 25 kinds of gases in the listed toxic gas emission inventory (TRI) of American National Environmental Protection Department (EPA), 18 kinds is organic matter.VOC (VOCs) odorant such as benzene, toluene, styrene, polycyclic aromatic hydrocarbon that mostly contains low concentration in organic exhaust gas.These worsen people's living environment, but also can work the mischief to health and ecological environment with the gaseous contaminant meeting severe jamming resident's of peculiar smell (smelly or fragrant) daily life.
Along with developing rapidly of Chinese national economy, particularly chemical industry and manufacturing development, the discharge capacity of industrial VOCs constantly increases, and has become at present the one of the main reasons of China key cities (group) and local atmospheric combined pollution.Aspect waste gas pollution control and treatment, after the dedusting that continues, desulphurization and denitration and Motor Vehicle Emission Control, the pollution control problem of industrial volatile organic waste gas has become the of paramount importance direction of present control air pollution in China.
At present a lot of for the processing method of VOCs, mainly can be divided into heat treating process, Physical, biological degradation method etc.Wherein general with the heat treating process application, it is very wide to the accommodation of VOCs kind and concentration.These class methods mainly are divided into firing method and Production by Catalytic Combustion Process.Ordinary combustion method system is simple, but energy consumption is very large, and the heat accumulating type oxidation is burned and improved the large shortcoming of energy consumption, but still has NO
xDischarge higher problem; The Production by Catalytic Combustion Process development in recent years is very fast, but the catalyst price is higher, requires can not contain the composition that causes catalyst poisoning in waste gas, and as a kind of low-temperature burning technology, it is still the bottleneck that the restriction catalysis technique is applied that the generation of its dioxin suppresses.
Circulating fluidized bed technique is a kind of clean burning technology, its running temperature is generally at 850～950 ℃, because material concentration is high, gas-solid mixing is strong, and efficiency of combustion is high, pollutant emission is low, be a kind of cleaning incineration technology, adopt CFBC based process VOC, its advantage is not need pretreatment, adaptable to gas componant, treatment effeciency is high.Therefore, exploitation has broad application prospects for the circulating fluidized bed incinerator of volatile organic waste gas.
The concentration of VOC is often lower, and that its concentration range is low is 10～1000ppm, and high is 2～3%.Therefore, when adopting high-temperature combustion method to process VOC, lower to the requirement of combustion air volume.Choosing to 0.528 power of the density of material of the operating air velocity of recirculating fluidized bed is directly proportional, and traditional recirculating fluidized bed selects quartz sand, cinder to expect as bed, and the bulk density of these material is larger, is generally 1100～1300kg/m
3Therefore, cause its critical fluidising air velocity higher, also cause moving air quantity higher, exceed the required combustion-supporting air quantity of actual after-flame VOC far away, correspondingly the power requirement to fluidized air blower is also high, in addition, these combustion airs are heated to 850 ℃, have also wasted a large amount of energy, cause cost of disposal high, limited its range of application.Therefore, reduce the density of inert bed material, can effectively reduce operating cost.
The utility model content
Low for the VOC concentration that produces in industrial production, require low to burning air capacity, and in existing circulating fluidized bed incinerator, bed material density is high, required fluidising air velocity large and then cause the large contradiction of air quantity, the utility model that a kind of low circulating fluidized bed incinerator of fluidising air velocity that VOC burns that is suitable for is provided.
A kind of circulating fluidized bed incinerator of VOC comprises:
Burner hearth;
Be positioned at the air compartment of described burner hearth bottom;
Be arranged at the gas access at described burner hearth middle part;
With the separator that described roof of the furnace is communicated with, this separator has top exit and outlet at bottom;
The back-end ductwork that is communicated with described top exit;
Be used for connecting the refeed line of described outlet at bottom and burner hearth;
Be separated with air distribution plate between described burner hearth bottom and air compartment;
Described air compartment is circumscribed with fluidized air blower by pipeline;
The bottom of described burner hearth is equipped with the bed material, and described bed material is the hollow bead of aluminium oxide.
VOC and assistant coal are sent in burner hearth respectively to burn, the fluidized wind that fluidized air blower is produced by boasting enters air compartment, then enter burner hearth by air distribution plate, bed material fluidisation is got up, tiny bed material particle is raised suction, is entrained into and falls into refeed line by centrifugal force, gravity in separator and send into burner hearth by flue gas, has consisted of circulation; The thin ash that produces in burning enters back-end ductwork and discharges.
Fuel in the mobile drive burner hearth of bed material fluctuates, and the circulation of bed material has improved the granule density of combustion space, fully contacts with VOC with air in burner hearth, makes the burning of VOC more abundant.
The fluidisation of bed material directly affects the efficiency of combustion of burner hearth fuel.And fluid mapper process is closely related with bed material and fluidising air velocity, and the density of bed material particle is less, more easily is converted into the fluidisation attitude.While, in 850～950 ℃ of scopes, the bed material that therefore adds must have resistant to elevated temperatures performance due to the operating temperature in burner hearth in typical circulating fluidized bed incinerator.As preferably, expect to be the hollow bead of aluminium oxide for described; Aluminium oxide has higher fusing point, can resist the high temperature of 2000 ℃ of left and right, and aluminium oxide is made hollow bead, greatly reduces the density of aluminium oxide, makes corresponding critical fluidising air velocity greatly reduce, and has reduced the power requirement to fluidized air blower.
As preferably, the bulk density of the hollow bead of described aluminium oxide is 600～900kg/m
3
Except the bulk density of bed material particle, other physical characteristic parameters such as solid particle size, sphericity and the particle size distribution etc. of bed material are determining also whether recirculating fluidized bed can efficient, trouble-free operation.
Bed material particle diameter is excessive, normal primary air flow can't blow afloat the bed material, after long-term operation, a large amount of large particle diameter bed material will be deposited on a material layer lower part, affect the fluidisation of the whole bed bed of material, making becomes dead bed in burner hearth, and bed temperature may appear, a bed end finger shows extremely, the incinerator parameter can't be kept, can form coking when serious, as can not in time reversing, be easy to cause that final fluidisation is undesired is forced to blowing out; Bed material particle diameter is meticulous, will cause separator to reduce, and can't form Matter Transfer, reduces the bed material concentration of combustion space.Therefore, as preferably, the particle diameter of the hollow bead of described aluminium oxide is 1～5mm.
Compared with prior art, the utlity model has following beneficial effect:
The utility model adopts recirculating fluidized bed to come the burning disposal VOC, can make VOC in recirculating fluidized bed under the burning condition of 850～950 ℃ the time of staying greater than 3 seconds, guarantee its firing efficiency.The utility model adopts the hollow bead of aluminium oxide to expect as bed, the bulk specific weight of the hollow bead of aluminium oxide is little, therefore make a critical fluidising air velocity of the recirculating fluidized bed of material with the hollow bead of aluminium oxide little, reach the recirculating fluidized bed of identical fluid effect, its air quantity is approximately 2/3 of traditional recirculating fluidized bed, therefore can reduce significantly the fluidisation air quantity.
The circulating fluidized bed incinerator of the utility model VOC adopts the hollow bead of aluminium oxide to expect as bed, when burning VOC, along with the reduction of critical fluidising air velocity, the fluidisation air quantity reduces thereupon, therefore can control better excess air coefficient.
The circulating fluidized bed incinerator of the utility model VOC adopts the hollow bead of aluminium oxide to expect as bed, the fluidisation air quantity is reduced, mean that also the power consumption of fluidized air blower reduces, simultaneously, the heat loss due to exhaust gas of corresponding incinerator also reduces, and has energy-conservation effect.
Description of drawings
Fig. 1 is the structural representation of the circulating fluidized bed incinerator of the utility model VOC.
The specific embodiment
Below in conjunction with accompanying drawing 1, structure and the running of the circulating fluidized bed incinerator of the utility model VOC is further described.
As shown in Figure 1, the circulating fluidized bed incinerator of VOC of the present utility model, comprise: burner hearth 1, be positioned at burner hearth 1 bottom air compartment 2, be arranged at the gas access 9 at described burner hearth middle part, the separator 4 that is communicated with burner hearth 1 top, this separator 4 have top exit and outlet at bottom, with the back-end ductwork 6 of top exit connection, for be separated with air distribution plate 3 between the refeed line 5, burner hearth bottom and the air compartment that are connected outlet at bottom and burner hearth, air compartment 2 is circumscribed with fluidized air blower 7 by pipeline.
It is the hollow bead 8 of aluminium oxide of 400mm that a layer thickness is laid in the bottom of burner hearth 1, and the particle diameter of the hollow bead of this aluminium oxide is about 3mm.This circulating fluidized bed incinerator also is provided with the back-end ductwork 6 with separator 4 upper end UNICOMs, and the flue gas that produces in combustion process is discharged from this back-end ductwork; Fluidized air blower 7 is used for providing fluidized wind to air compartment 2, and then with the bed material fluidisation in burner hearth 1.
Select the hollow bead of aluminium oxide to expect as bed, because the hollow bead bulk specific weight of aluminium oxide is little, therefore the critical fluidising air velocity of required circulating fluidized bed incinerator is little, means that also the power consumption of fluidized air blower reduces.The critical flow wind transmission speed ratio regular circulation fluid bed of this recirculating fluidized bed low 60%.
The course of work of the circulating fluidized bed incinerator of the utility model VOC is as follows:
during the operation of this circulating fluidized bed incinerator, the hollow bead 8 of aluminium oxide first is added into burner hearth 1, VOC and assistant coal are sent into burner hearth 1 from gas access 9 and fuel inlet respectively, the fluidized wind that fluidized air blower 7 is produced by boasting enters air compartment 2, then enter burner hearth 1 by air distribution plate 3, hollow bead 8 fluidisations of aluminium oxide are got up, the hollow bead of aluminium oxide is brought into burner hearth 1 middle and upper part heat exchange by a wind, the hollow bead 8 of aluminium oxide is raised suction by flue gas, be entrained in separator 4 and pass through centrifugal force, gravity falls into refeed line 5 and loops back into burner hearth 1, and the time of staying of VOC in the temperature moon burner hearth of 850～950 ℃ was over 3 seconds, discharge by back-end ductwork 6 through separator 4 after clean burning, assistant coal burns the flue gas that produces and also discharges by back-end ductwork 6.
The hollow bead 8 of aluminium oxide plays the effect of circulation fluidized bed material, and the hollow bead 8 of the oxidized aluminium of fuel combustion liberated heat absorbs, and guarantees that in burner hearth, temperature stabilization is at 850～950 ℃.The hollow bead of aluminium oxide by the centrifugation of separator 4, can be taken back burner hearth 1 to the heat that produces after blowing out burner hearth 1, guarantee that burner hearth 1 temperature is even.
Above embodiment is only in order to the technical solution of the utility model to be described but not be limited; in the situation that do not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (3)
1. the circulating fluidized bed incinerator of a VOC comprises:
Burner hearth;
Be positioned at the air compartment of described burner hearth bottom;
Be arranged at the gas access at described burner hearth middle part;
With the separator that described roof of the furnace is communicated with, this separator has top exit and outlet at bottom;
The back-end ductwork that is communicated with described top exit;
Be used for connecting the refeed line of described outlet at bottom and burner hearth;
Be separated with air distribution plate between described burner hearth bottom and air compartment;
Described air compartment is circumscribed with fluidized air blower by pipeline;
It is characterized in that, the bottom of described burner hearth is equipped with the bed material, and described bed material is the hollow bead of aluminium oxide.
2. the circulating fluidized bed incinerator of VOC as claimed in claim 1, is characterized in that, the bulk density of the hollow bead of described aluminium oxide is 600～900kg/m
3
3. the circulating fluidized bed incinerator of VOC as claimed in claim 1, is characterized in that, the particle diameter of the hollow bead of described aluminium oxide is 1～5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220598216 CN202973118U (en) | 2012-11-13 | 2012-11-13 | Circulating fluidized bed incinerator for volatile organic gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220598216 CN202973118U (en) | 2012-11-13 | 2012-11-13 | Circulating fluidized bed incinerator for volatile organic gas |
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| Publication Number | Publication Date |
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| CN202973118U true CN202973118U (en) | 2013-06-05 |
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| CN 201220598216 Expired - Lifetime CN202973118U (en) | 2012-11-13 | 2012-11-13 | Circulating fluidized bed incinerator for volatile organic gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913917A (en) * | 2012-11-13 | 2013-02-06 | 浙江大学 | Technology for incinerating volatile organic gases and circulating fluidized bed incinerator utilizing technology |
| CN111380061A (en) * | 2020-03-26 | 2020-07-07 | 广东产品质量监督检验研究院（国家质量技术监督局广州电气安全检验所、广东省试验认证研究院、华安实验室） | Detection and resource utilization method for phosphorus flame retardant simulation incineration products in electronic garbage |
| CN111853834A (en) * | 2020-07-14 | 2020-10-30 | 江苏南方涂装环保股份有限公司 | Circulating fluidized bed catalytic combustion method for treating organic waste gas |
-
2012
- 2012-11-13 CN CN 201220598216 patent/CN202973118U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913917A (en) * | 2012-11-13 | 2013-02-06 | 浙江大学 | Technology for incinerating volatile organic gases and circulating fluidized bed incinerator utilizing technology |
| CN111380061A (en) * | 2020-03-26 | 2020-07-07 | 广东产品质量监督检验研究院（国家质量技术监督局广州电气安全检验所、广东省试验认证研究院、华安实验室） | Detection and resource utilization method for phosphorus flame retardant simulation incineration products in electronic garbage |
| CN111380061B (en) * | 2020-03-26 | 2022-04-15 | 广东产品质量监督检验研究院（国家质量技术监督局广州电气安全检验所、广东省试验认证研究院、华安实验室） | Detection and resource utilization method for phosphorus flame retardant simulation incineration products in electronic garbage |
| CN111853834A (en) * | 2020-07-14 | 2020-10-30 | 江苏南方涂装环保股份有限公司 | Circulating fluidized bed catalytic combustion method for treating organic waste gas |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |