CN113280355A - Flue gas secondary combustion and high-temperature filtering and dedusting integrated device and process - Google Patents
Flue gas secondary combustion and high-temperature filtering and dedusting integrated device and process Download PDFInfo
- Publication number
- CN113280355A CN113280355A CN202110598875.6A CN202110598875A CN113280355A CN 113280355 A CN113280355 A CN 113280355A CN 202110598875 A CN202110598875 A CN 202110598875A CN 113280355 A CN113280355 A CN 113280355A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- temperature
- filtering
- secondary combustion
- integrated device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003546 flue gas Substances 0.000 title claims abstract description 143
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 238000001914 filtration Methods 0.000 title claims abstract description 96
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 title claims abstract description 31
- 239000000428 dust Substances 0.000 claims abstract description 89
- 239000010881 fly ash Substances 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 10
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000010813 municipal solid waste Substances 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 15
- 239000000779 smoke Substances 0.000 claims description 12
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 239000002956 ash Substances 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 2
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical group O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 abstract description 31
- 238000004056 waste incineration Methods 0.000 abstract description 13
- 238000000354 decomposition reaction Methods 0.000 abstract description 9
- 238000000197 pyrolysis Methods 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 19
- 239000004744 fabric Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 239000008187 granular material Substances 0.000 description 11
- 238000004062 sedimentation Methods 0.000 description 8
- 230000002349 favourable effect Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000009264 composting Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a flue gas secondary combustion and high-temperature filtering and dust removing integrated device, which comprises a furnace chamber, wherein a cavity dividing plate is arranged at the bottom of the furnace chamber and divides the furnace chamber into a combustion settling area and a filtering area, the upper parts of the combustion settling area and the filtering area are mutually communicated, a plurality of groups of guide plates are arranged on the side wall in the combustion settling area, a filtering component is arranged between the side walls in the filtering area, and a flue gas inlet and a flue gas outlet are respectively formed in one side of the lower part of the furnace chamber, which is close to the combustion settling area and the filtering area; the invention also discloses a process for treating waste incineration, which comprises the steps of carrying out secondary combustion and high-temperature filtration and dust removal on the flue gas formed by waste incineration or pyrolysis, spraying lime water to remove acid and adsorbing active carbon to obtain the flue gas reaching the standard and discharging the flue gas. The device of the invention promotes the full decomposition of dioxin through a plurality of groups of guide plates, and removes fly ash through the filtering component; the process of the invention can complete the treatment of the fly ash while fully decomposing the dioxin, thereby avoiding the large enrichment of the dioxin in the fly ash and ensuring the effective removal of the dioxin.
Description
Technical Field
The invention belongs to the technical field of waste incineration treatment, and particularly relates to a flue gas secondary combustion and high-temperature filtering and dust removing integrated device and process.
Background
With the development of economy and the great improvement of living standard of people, the urban solid domestic garbage is more and more, 1.5kg of domestic garbage is generated by each person on average every day, taking a city with more than 700 million people as an example, the preliminary estimate of the daily garbage of the citizens is 10740 tons. The great rise of the garbage production amount harms the city appearance of the city greatly, lowers the life quality of citizens and pollutes the living environment of people. Therefore, the method and the process for treating the household garbage are one of the problems which are always concerned by researchers.
Due to the improvement of the environmental protection standard, the treatment mode of the domestic garbage gradually tends to reduction, recycling and harmless treatment from original composting and landfill. These original disposal methods are very hazardous and affect the living environment and human health. Compared with the traditional composting and landfill treatment, the garbage incineration has the advantages and disadvantages and occupies a larger and larger proportion in the harmless treatment. The garbage incineration treatment capacity is increased rapidly, the amount of the garbage incineration treatment is increased from 791 ten thousand tons/year in 2005 to 34000 ten thousand tons/year in 2020 in the whole country, and the incineration rate is also increased from 10% in 2005 to 40% in 2019. Along with the increasing proportion of urbanization of residents, the production amount of garbage is also increasing, the proportion of incineration treatment in harmless treatment is also increasing, and the advantage of incineration is also presented continuously. The volume of the incinerated garbage is reduced by 50-80 percent compared with the original volume, and the combustible garbage collected by classification can be even reduced by 90 percent after incineration treatment; after incineration treatment, a large amount of pathogens such as germs, viruses, parasitic ova and the like in the garbage are thoroughly eliminated; the garbage incineration can also realize energy recycling, and internal energy is converted into heat energy and electric energy, including incineration power generation, heat supply and cogeneration. Therefore, incineration disposal is a strategic choice by regulatory agencies for the reduction and disposal of municipal solid waste. However, a great amount of harmful flue gas substances such as dioxin, sulfide, acid gas, solid dust and the like are easily generated in the process of waste incineration, and the largest difficulty in flue gas treatment is the removal of the dioxin. Because the dioxin is required to stay for more than 1.6 seconds (generally controlled to be 2 seconds) at 850 ℃, but can be completely decomposed, but can be rapidly secondarily synthesized at 400-600 ℃, the standard process requires that the flue gas is rapidly quenched to be below 400 ℃ after being burnt at high temperature, and the fly ash can continuously participate in the process, so that the dioxin is greatly enriched in the fly ash. Therefore, how to reduce the enrichment of dioxin in fly ash is one of the key problems to be solved by waste incineration.
In order to achieve standard emission of domestic garbage, the existing standard process must adopt a five-step method comprising garbage incineration/pyrolysis, flue gas secondary combustion, lime water spraying, activated carbon adsorption and cloth bag dust removal, and the five-step method and the corresponding effects of each step are shown in figure 1. The products with the smoke emission reaching the national mandatory standard have no exception of adopting smoke treatment measures such as acid removal, dust removal and the like. However, the existence of the fly ash in the flue gas makes the treatment flow of the five-step method become complicated, on one hand, a large amount of soot byproducts rich in dioxin are collected in two key steps of lime water spraying, acid removing and activated carbon adsorption, and the difficulty in subsequent byproduct treatment is increased; on the other hand, end soot fly ash disposal is also difficult. At present, fly ash is filtered mainly by using a bag-type dust collector, most of main dust collecting equipment of an operating waste incineration power plant is the bag-type dust collector, but the bag-type dust collector is difficult to realize due to the harsh environment formed by high-temperature smoke generated by incineration. Firstly, the temperature range of the dust removal technology is narrow, and the filtering treatment at the highest temperature of about 280 ℃ can be realized; the high-temperature materials such as PTEE, aramid fiber and the like in the current market can resist the temperature of about 260 ℃, and the properties can be greatly changed along with the temperature fluctuation. Secondly, the stability is generally poor, most of flue gas treatment processes of commercially available small-sized equipment are simplified versions of standard processes, the combustion operation of a system is unstable, and the instantaneous temperature rise easily burns through a filter cloth bag; the cloth bag has strong water absorption, so that water vapor is condensed at low temperature and is easy to form a muddy mixture with fly ash, thereby causing the 'paste' of the cloth bag to lose efficacy. Thirdly, the economy is poor, due to the limitation of the service life of the cloth bag, the cloth bag has to be frequently replaced, the technical requirement of equipment blowing-out maintenance is high, the system stability is poor, dust is easily accumulated on a pipeline, and the damage of flue gas treatment equipment is easily caused. Fourth, the biodegradability of the cloth bag is poor, the ineffective cloth bag has no better treatment means so far, most of the cloth bag is used as garbage to be disposed, and secondary pollution can be caused no matter the cloth bag is burnt or buried.
Disclosure of Invention
The invention aims to solve the technical problem of providing an integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal aiming at the defects of the prior art. The furnace chamber of the device is divided into a combustion settling area and a filtering area, a plurality of groups of guide plates are arranged in the combustion settling area to form a guide channel, so that flue gas enters the furnace chamber and goes upwards along the guide channel after being secondarily combusted to form high-temperature flue gas, the residence time of the high-temperature flue gas is prolonged, the full decomposition of dioxin is promoted, fly ash in the high-temperature flue gas is effectively removed through the filtering area, and the problem that the dioxin is enriched in the fly ash in a large amount and is difficult to remove is solved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a flue gas postcombustion and high temperature filter dust removal integrated device, its characterized in that, includes the furnace chamber, the bottom of furnace chamber is provided with the chamber board of dividing, and divides the chamber board to separate into the burning subsidence area and the filtering area of upper portion intercommunication each other, be provided with the multiunit guide plate on the lateral wall in the burning subsidence area, be provided with filter assembly between the lateral wall in the filtering area, the flue gas import has been seted up to one side that the furnace chamber lower part is close to the burning subsidence area, and the exhanst gas outlet has been seted up to one side that is close to the filtering area.
The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal is characterized in that the guide plates are obliquely upwards arranged along the side wall in the combustion settling zone in a relatively staggered manner.
The integrated device for secondary combustion and high-temperature filtration and dust removal of the flue gas is characterized in that an ash collecting groove is formed in the connection position of the side wall in the combustion settling zone and the plurality of groups of guide plates.
The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal is characterized in that the filter assembly comprises one or more groups of intercepting filter screens, and the filter precision of the intercepting filter screens is in gradient increasing distribution from top to bottom.
The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal is characterized in that the filter assembly is obliquely and downwards arranged between the side walls of the filter area.
The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal is characterized in that a tail end filter screen is vertically arranged on the side wall of the furnace chamber close to the flue gas outlet.
The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal is characterized in that a fly ash filter screen is arranged in the flue gas outlet.
The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal is characterized in that an air inlet is formed in the furnace chamber, and a plurality of groups of igniters are arranged in the combustion settling area.
In addition, the invention also provides a process for carrying out waste incineration treatment by using the device, which is characterized by comprising the following steps:
firstly, burning or pyrolyzing the garbage to form smoke;
secondly, feeding the flue gas formed in the first step into a flue gas secondary combustion and high-temperature filtering and dedusting integrated device for secondary combustion and high-temperature filtering and dedusting to obtain dedusting high-temperature flue gas;
thirdly, spraying lime water on the dedusting high-temperature flue gas obtained in the second step to remove acid, so as to obtain acid-removed gas;
and step four, carrying out activated carbon adsorption on the deacidified gas obtained in the step three to obtain standard flue gas and discharging the standard flue gas.
Compared with the existing standard process of waste incineration treatment by a five-step method, namely waste incineration/pyrolysis, flue gas secondary combustion, lime water spraying, activated carbon adsorption and cloth bag dust removal (shown in figure 1), the flue gas formed by the first-step waste incineration or pyrolysis is directly sent into the flue gas secondary combustion and high-temperature filtering dust removal integrated device to be subjected to secondary combustion and high-temperature filtering dust removal, the flue gas is converted into high-temperature flue gas by using the flue gas secondary combustion and high-temperature filtering dust removal integrated device, particle dust and fly ash impurities in the high-temperature flue gas are effectively removed, the full decomposition of dioxin is promoted, the large amount of enrichment of dioxin in the fly ash is avoided, the effective removal of dioxin is ensured, and the standard flue gas meeting the emission standard is obtained by sequentially carrying out lime water spraying deacidification and activated carbon adsorption. Meanwhile, the invention realizes gas-solid separation through high-temperature filtration and dust removal, achieves the purposes of gas purification and resource recovery, utilizes the physical sensible heat of the gas to the maximum extent, improves the energy utilization rate, does not need to control the temperature of the flue gas after filtration and dust removal, and is convenient for the full utilization of the waste heat of the flue gas.
Compared with the prior art, the invention has the following advantages:
1. the furnace chamber of the device is divided into a combustion settling area and a filtering area, a plurality of groups of guide plates are arranged in the combustion settling area to form a guide channel, so that the flue gas enters the furnace chamber to form high-temperature flue gas through secondary combustion, the high-temperature flue gas goes upwards along the guide channel, the flow speed of the high-temperature flue gas is delayed, the residence time of the high-temperature flue gas in the high-temperature state in the furnace chamber is prolonged, the full decomposition of dioxin is promoted, the filtering assembly is arranged in the filtering area to intercept particle dust in the high-temperature flue gas, the flying ash in the high-temperature flue gas is effectively removed, the large enrichment of dioxin in the flying ash is avoided, and the effective removal of dioxin is ensured.
2. The guide plates are obliquely upwards arranged and are oppositely staggered to form the smoke cross flow channel, so that the smoke cross flow channel is ensured to flow through a downward-folded reverse downward path in the upward flowing process of high-temperature smoke, the residence time of the high-temperature smoke is further prolonged, the full decomposition of dioxin is promoted, large particle dust in the high-temperature smoke is fully and naturally settled and gathered on the guide plates, the preliminary settlement and dust removal are realized, and the centralized cleaning of the settled dust is facilitated.
3. According to the invention, a plurality of groups of intercepting filter screens with gradually increasing distribution of filter precision from top to bottom are used as filter components, and according to the difference of particle sizes of the particle dust, the particle dust with different particle sizes is removed one by one, so that the filter efficiency is improved.
4. According to the invention, the filter assembly is obliquely arranged downwards, so that the filter area is increased, the filter efficiency is improved, the flow and the collection of the particle dust intercepted by the filter assembly are facilitated, and the centralized cleaning of the filter dust in the device at the later stage is facilitated.
5. According to the invention, the filter assembly is arranged to be combined with the tail end filter screen and the fly ash filter screen, so that multi-stage filtration is synchronously completed in the flowing process of high-temperature flue gas, fly ash is effectively intercepted, the filtration and impurity removal effects are improved, secondary synthesis of dioxin caused by quenching failure due to the doping of fly ash is avoided, meanwhile, the subsequent ash accumulation of a pipeline is reduced, and the equipment maintenance period is shortened.
6. The invention adopts the high-temperature-resistant and acid-resistant metal porous material or ceramic porous material as the material of the filtering component, has excellent filtering performance under the severe working condition, can be back-blown and cleaned, has long service life, does not need to be frequently replaced, avoids the defect of equipment shutdown caused by frequent replacement, and saves the cost.
7. According to the process, the flue gas formed by burning or pyrolyzing the garbage is converted into the high-temperature flue gas by using the flue gas secondary combustion and high-temperature filtering and dedusting integrated device and filtered, so that particle dust and fly ash impurities in the high-temperature flue gas are effectively removed, the fly ash treatment is completed while the dioxin is fully decomposed, a large amount of enrichment of the dioxin in the fly ash is avoided, the effective removal of the dioxin is ensured, and the standard flue gas meeting the emission standard is obtained.
8. The invention changes the low-temperature cloth bag dust removal in the prior art into front-end high-temperature dust removal, organically combines the filtering dust removal with the secondary combustion process of the flue gas, effectively utilizes the physical sensible heat of the gas, improves the energy utilization rate, does not need to control the temperature of the flue gas after the filtering dust removal, and is convenient for the full utilization of the waste heat of the flue gas.
9. The invention improves the prior five-step process into a four-step process comprising waste incineration/pyrolysis, secondary combustion of flue gas, high-temperature filtration and dust removal, lime water spraying and activated carbon adsorption, simplifies the process flow, avoids the defects of cloth bag dust removal and secondary pollution of wet dust removal, and is suitable for popularization and application.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
FIG. 1 is a flow chart of a standard process for incineration treatment of waste in the prior art.
FIG. 2 is a schematic structural diagram of the integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal of the invention.
FIG. 3 is a flow chart of the waste incineration disposal process of the present invention.
Description of reference numerals:
1-flue gas inlet; 2-a cavity dividing plate; 3-ash collecting tank;
4-a deflector; 5-combustion settling zone; 6-a filtration zone;
7-high temperature flue gas; 8, a furnace chamber; 9-first-stage filter screen;
10-secondary filter screen; 11-a third-level filter screen; 12-end filter screen;
13-fly ash screen; 14-flue gas outlet.
Detailed Description
The flue gas secondary combustion and high-temperature filtering and dust removing integrated device is explained in detail by embodiment 1.
Example 1
As shown in fig. 2, the flue gas after-combustion and high-temperature filtration and dust removal integrated device of the embodiment includes a furnace chamber 8, the bottom of the furnace chamber 8 is provided with a cavity dividing plate 2, the cavity dividing plate 2 divides the furnace chamber 8 into a combustion settling zone 5 and a filtering zone 6, which are mutually communicated at the upper part, a plurality of groups of guide plates 4 are arranged on the side wall in the combustion settling zone 5, a filtering component is arranged between the side walls in the filtering zone 6, a flue gas inlet 1 is arranged at one side of the lower part of the furnace chamber 8 close to the combustion settling zone 5, and a flue gas outlet 14 is arranged at one side close to the filtering zone 6.
The invention adopts the cavity dividing plate 2 to divide the furnace chamber 8 of the device into a combustion settling zone 5 and a filtering zone 6, a flue gas inlet 1 is arranged at one side of the lower part of the furnace chamber 8 close to the combustion settling zone 5 for flue gas to enter the combustion settling zone 5 in the furnace chamber 8 from the flue gas inlet 1, a plurality of groups of guide plates 4 are arranged on the side wall in the combustion settling zone 5, the flue gas is ignited by high temperature or an igniter after entering the flue gas, the high temperature flue gas 7 is generated by secondary combustion in the device, the high temperature flue gas 7 ascends along a guide channel formed by the plurality of groups of guide plates 4, the flow direction of the high temperature flue gas 7 is guided by the plurality of groups of guide plates 4, the ascending path of the high temperature flue gas 7 is changed, the high temperature flue gas 7 is prevented from directly ascending to the upper part of the cavity of the furnace chamber 8 along the vertical direction, the flow speed of the high temperature flue gas 7 is delayed, and the detention time of the high temperature flue gas 7 in the combustion settling zone 5 is increased, therefore, the detention time of the high-temperature flue gas 7 in the device, namely the time in a high-temperature state is longer than the pyrolysis time of the dioxin, so that the full decomposition of the dioxin is promoted, meanwhile, the full natural sedimentation of large-particle dust in the high-temperature flue gas 7 is promoted, and the preliminary sedimentation and dust removal are realized; then, the high-temperature flue gas after preliminary sedimentation and dust removal goes upward from the combustion sedimentation area 5 and enters the filtering area 6 through a channel communicated with each other at the upper part of the furnace chamber 8, and as the filtering component is arranged between the side walls in the filtering area 6, the high-temperature flue gas after preliminary sedimentation and dust removal is filtered by the filtering component, dust, especially small particle dust, is further intercepted and removed, fly ash in the high-temperature flue gas is effectively removed, and the fly ash is prevented from participating in a subsequent quenching process of the high-temperature flue gas, so that the large enrichment of dioxin in the fly ash is avoided, and simultaneously, the fly ash is prevented from entering quenching equipment to cause quenching failure and secondary synthesis of dioxin, and the effective removal of the dioxin after the subsequent quenching process is ensured.
Further, in the present embodiment, the plurality of groups of baffles 4 are obliquely and upwardly arranged along the side wall of the combustion settling zone 5 and are arranged in a staggered manner. Through with multiunit guide plate 4 along the lateral wall slope in the burning subsidence area 5 upwards and relative crisscross setting form flue gas cross-flow channel, be favorable to the high temperature flue gas to go upward in proper order along the passageway direction that multiunit guide plate 4 formed, and guaranteed the ascending backward down route of flowing through of the in-process of flowing of high temperature flue gas, the flow velocity of high temperature flue gas has further been delayed, the detention time of high temperature flue gas at burning subsidence area 5 has been increased, the abundant decomposition of dioxin is promoted completely, be favorable to the large granule dust in the high temperature flue gas to subside and adhere to on guide plate 4 along guide plate 4 simultaneously, and gather in the junction of guide plate 4 and lateral wall along the surface flow of guide plate 4, the concentrated clearance of subsiding the dust in the later stage to the device has been made things convenient for.
Further, in this embodiment, an included angle between the guide plate 4 and the side wall in the combustion settling zone 5 is 15 ° to 45 °. Through the injecing of this contained angle, both effectively delayed the flow velocity of high temperature flue gas, increased the detention time of high temperature flue gas, be favorable to again in the high temperature flue gas large granule dust subside and attached to on guide plate 4, still guaranteed the ascending speed of high temperature flue gas simultaneously, improved the whole effect of subsiding of high temperature flue gas.
Further, in the present embodiment, the angle between the baffle 4 and the sidewall of the combustion settling zone 5 is 30 °. The included angle realizes the integral optimal settling effect of the high-temperature flue gas in the combustion settling zone 5.
In actual operation, on the premise of ensuring the residence time of the high-temperature flue gas in the furnace chamber 8, the arrangement quantity and the arrangement angle of the guide plates can be flexibly adjusted according to the structure and the size of the device.
Further, in this embodiment, the plurality of groups of baffles 4 are arranged in parallel. Through parallel arrangement of a plurality of groups of guide plates 4, consistency and stability of flow speed of high-temperature flue gas between different guide plates 4 are guaranteed, and then sedimentation rate is controlled, and sedimentation effect is further improved. The spacing between the groups of baffles 4 is also controlled to be equal to enhance the flow stability of the high-temperature flue gas.
Further, in this embodiment, an ash collecting groove 3 is formed at a connection position of the side wall of the combustion settling zone 5 and the plurality of groups of guide plates 4. Because the large granule dust subsides in the high temperature flue gas the back and adheres to the surface at guide plate 4, and gather in the junction of guide plate 4 and lateral wall along the surface flow of guide plate 4 under the action of gravity, through locating to set up dust collection groove 3 in this position, make the large granule dust get into in dust collection groove 3 through collecting, avoided piling up or getting into the high temperature flue gas again of large granule dust on guide plate 4, be convenient for in time clear away the large granule dust, the smooth of settlement process has been guaranteed, be favorable to improving simultaneously and subside the effect.
Further, the filter assembly in this embodiment includes one or more groups of intercepting filter screens, and the filtering precision of the plurality of groups of intercepting filter screens is distributed in a gradient increasing manner from top to bottom. Be gradient through setting up filter fineness and increase progressively the multiunit interception filter screen that distributes, make the high temperature flue gas through preliminary settlement dust removal get into multiunit interception filter screen in proper order, get rid of great granule dust through the interception filter screen that upper portion filter fineness is less earlier through the interception, then in proper order through the interception filter screen that lower part filter fineness gradient increases, carry out the interception respectively and get rid of the tiny particle dust, through the setting of this multiunit interception filter screen, according to the difference of granule dust particle diameter, the granule dust to different particle diameters has been realized getting rid of one by one, thereby filtration efficiency has been improved. Generally, the intercepting filter net can be arranged in various forms such as a plate type, a pipe type and the like. In actual operation, the number of the intercepting filter screens, the size of the pore of each group of intercepting filter screens and the filtering precision can be flexibly adjusted according to the size of the particle type in the raw material flue gas, the flue gas quantity and the filtering requirement.
Further, the filter assembly in this embodiment includes a first filter screen 9, a second filter screen 10 and a third filter screen 11 arranged from top to bottom. Through setting up tertiary filter screen, form effective interception to the granule dust, reduce the hindrance effect of filter assembly to the high temperature flue gas through preliminary settlement dust removal simultaneously, guaranteed filtration efficiency. Generally, the aperture of the first filter 9 is 500 to 1000 μm, the aperture of the second filter 10 is 200 to 500 μm, and the aperture of the third filter 11 is 50 to 200 μm.
Further, the filter assembly in this embodiment is arranged obliquely downwards between the side walls in the filter area 6. The filter area of the filter assembly is increased through the arrangement, so that the high-temperature flue gas subjected to preliminary sedimentation and dust removal can enter the filter assembly and be fully intercepted to remove particle dust; meanwhile, the particle dust intercepted by the filtering component is attached to the surface of the filtering component and flows and gathers at the connecting part of the filtering component and the side wall under the action of gravity to form a dust gathering area, so that the centralized cleaning of the filtering dust in the device at the later stage is facilitated. In general, the filter assembly can be arranged in a vibration mode, so that more filter particle dust is promoted to enter the dust accumulation area while the filtering efficiency is improved, and the service life of the filter assembly is prolonged. Usually, the dust collecting groove is also formed at the joint of the side wall of the filtering area and the filtering component, so that the particle dust is collected and enters the dust collecting groove, and timely and regular cleaning is facilitated.
Further, the included angle between the filter assembly and the side wall of the filtering area 6 is 15-60 degrees in the embodiment. Through the limitation of the included angle, the filtering area of the filtering component is effectively increased, the filtering effect is improved, the filtering component is favorable for filtering dust to be attached to the surface of the filtering component and gather, the filtering speed is ensured, and the integral filtering effect is improved.
Further, the filter element in this embodiment is angled at 45 ° to the side wall of the filter area 6. The included angle achieves the overall best filtering effect of the high-temperature flue gas in the filtering area 6.
Further, in this embodiment, the side wall of the furnace chamber 8 near the flue gas outlet 14 is vertically provided with the end filter screen 12. Through set up terminal filter screen 12 on 8 lateral walls of furnace chamber near exhanst gas outlet 14, further filter the edulcoration to the high temperature flue gas after filtering the subassembly and handling, improved and filtered the edulcoration effect, prevent debris such as other large granule smoke and dust from getting into furnace chamber 8 from exhanst gas outlet 14 simultaneously, guaranteed the filter effect.
Further, in the present embodiment, a fly ash screen 13 is disposed inside the flue gas outlet 14. Through the arrangement, the fly ash in the high-temperature flue gas treated by the filter assembly is further intercepted and removed, and the filter mesh diameter of the fly ash filter screen 13 is usually selected to be 1-100 μm, and more preferably 5-10 μm, so that the interception and removal of impurities such as the fly ash are realized, and the subsequent deacidification and rapid cooling process can be smoothly carried out.
Further, in this embodiment, the furnace chamber 8 is provided with an air inlet, and a plurality of sets of igniters are disposed in the combustion settling zone 5. An air inlet is formed in the furnace chamber 8 to supplement fresh air in time, so that the flue gas is fully combusted secondarily; through set up multiunit some firearm in burning subsidence area 5 for the flue gas of different positions department in burning subsidence area 5 all can carry out the postcombustion, has strengthened the stability of postcombustion process, has especially guaranteed that the temperature in the 8 cavities of furnace chamber is higher than the complete decomposition temperature 850 ℃ of dioxin all the time, has ensured the abundant decomposition of dioxin.
Further, in this embodiment, one or more of the intercepting filter, the end filter 12 and the fly ash filter 13 are made of a high temperature resistant and acid resistant metal porous material or a ceramic porous material. Generally, the high temperature resistance can reach more than 1000 ℃. The multiple groups of intercepting filter screens made of the preferred materials still have excellent filtering working performance under the high-temperature state in the cavity of the device and in the presence of acid gas (generated by waste incineration), and the smooth proceeding of the filtering process is ensured.
The process of incineration of garbage according to the present invention is described in detail in example 2.
Example 2
As shown in fig. 3, the present embodiment includes the following steps:
firstly, burning or pyrolyzing the garbage to form smoke;
secondly, feeding the flue gas formed in the first step into a flue gas secondary combustion and high-temperature filtering and dedusting integrated device, and performing secondary combustion and high-temperature filtering and dedusting at the temperature of over 850 ℃ to obtain dedusting high-temperature flue gas;
thirdly, spraying lime water on the dedusting high-temperature flue gas obtained in the second step to remove acid, so as to obtain acid-removed gas;
and step four, carrying out activated carbon adsorption on the deacidified gas obtained in the step three to obtain standard flue gas and discharging the standard flue gas.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (9)
1. The utility model provides a flue gas postcombustion and high temperature filter dust removal integrated device, its characterized in that, includes furnace chamber (8), the bottom of furnace chamber (8) is provided with and divides cavity plate (2), and divides cavity plate (2) to separate into burning subsidence area (5) and filtering area (6) that upper portion communicates each other with furnace chamber (8), be provided with multiunit guide plate (4) on the lateral wall in burning subsidence area (5), be provided with filter assembly between the lateral wall in filtering area (6), flue gas inlet (1) have been seted up to one side that furnace chamber (8) lower part is close to burning subsidence area (5), have seted up exhanst gas outlet (14) near one side of filtering area (6).
2. The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal as claimed in claim 1, wherein the groups of guide plates (4) are obliquely upwards arranged along the side wall in the combustion settling zone (5) and are oppositely staggered.
3. The integrated device for secondary combustion and high-temperature filtration and dust removal of flue gas as claimed in claim 1, wherein the connection part of the side wall in the combustion settling zone (5) and the plurality of groups of guide plates (4) is provided with an ash collection groove (3).
4. The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal as claimed in claim 1, wherein the filter assembly comprises one or more groups of intercepting filter screens, and the filter precision of the groups of intercepting filter screens is gradually and gradually distributed from top to bottom.
5. The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal as claimed in claim 1, wherein the filter assembly is arranged between the side walls in the filter zone (6) in an inclined downward manner.
6. The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal as claimed in claim 1, wherein a terminal filter screen (12) is vertically arranged on the side wall of the furnace chamber (8) close to the flue gas outlet (14).
7. The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal as claimed in claim 1, wherein a fly ash screen (13) is arranged inside the flue gas outlet (14).
8. The integrated device for secondary combustion of flue gas and high-temperature filtration and dust removal as claimed in claim 1, wherein the furnace chamber (8) is provided with an air inlet, and a plurality of sets of igniters are arranged in the combustion settling zone (5).
9. A process for the incineration of waste using the apparatus of any one of claims 1 to 8, the process comprising the steps of:
firstly, burning or pyrolyzing the garbage to form smoke;
secondly, feeding the flue gas formed in the first step into a flue gas secondary combustion and high-temperature filtering and dedusting integrated device for secondary combustion and high-temperature filtering and dedusting to obtain dedusting high-temperature flue gas;
thirdly, spraying lime water on the dedusting high-temperature flue gas obtained in the second step to remove acid, so as to obtain acid-removed gas;
and step four, carrying out activated carbon adsorption on the deacidified gas obtained in the step three to obtain standard flue gas and discharging the standard flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110598875.6A CN113280355A (en) | 2021-05-31 | 2021-05-31 | Flue gas secondary combustion and high-temperature filtering and dedusting integrated device and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110598875.6A CN113280355A (en) | 2021-05-31 | 2021-05-31 | Flue gas secondary combustion and high-temperature filtering and dedusting integrated device and process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113280355A true CN113280355A (en) | 2021-08-20 |
Family
ID=77282593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110598875.6A Pending CN113280355A (en) | 2021-05-31 | 2021-05-31 | Flue gas secondary combustion and high-temperature filtering and dedusting integrated device and process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113280355A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321960A (en) * | 2021-12-07 | 2022-04-12 | 北京科技大学 | Processing system of waste incineration flue gas |
| CN114673994A (en) * | 2022-03-16 | 2022-06-28 | 王惠生 | Combustion method for controlling dioxin resynthesis |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1002995A2 (en) * | 1998-11-10 | 2000-05-24 | Innovative Environmental Technology Co., Ltd. | Waste incinerator and secondary combustion device |
| CN204227686U (en) * | 2014-09-30 | 2015-03-25 | 江苏智方建设工程有限公司 | A kind of environment-protection boiler |
| CN106594756A (en) * | 2015-10-15 | 2017-04-26 | 圣堃环保科技（上海）有限公司 | Garbage incinerator |
| CN206600820U (en) * | 2017-02-27 | 2017-10-31 | 山东创新华一环境工程有限公司 | A kind of waste incinerator |
| CN111043605A (en) * | 2019-12-30 | 2020-04-21 | 深圳续盈环保科技有限公司 | Garbage combustion furnace |
| CN210934222U (en) * | 2019-10-31 | 2020-07-07 | 兖矿科技有限公司 | Beehive type flue gas dust removal device and flue gas dust removal system using same |
| CN211585867U (en) * | 2019-12-30 | 2020-09-29 | 扬州久禄机械制造有限公司 | Fine dust removal device |
-
2021
- 2021-05-31 CN CN202110598875.6A patent/CN113280355A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1002995A2 (en) * | 1998-11-10 | 2000-05-24 | Innovative Environmental Technology Co., Ltd. | Waste incinerator and secondary combustion device |
| CN204227686U (en) * | 2014-09-30 | 2015-03-25 | 江苏智方建设工程有限公司 | A kind of environment-protection boiler |
| CN106594756A (en) * | 2015-10-15 | 2017-04-26 | 圣堃环保科技（上海）有限公司 | Garbage incinerator |
| CN206600820U (en) * | 2017-02-27 | 2017-10-31 | 山东创新华一环境工程有限公司 | A kind of waste incinerator |
| CN210934222U (en) * | 2019-10-31 | 2020-07-07 | 兖矿科技有限公司 | Beehive type flue gas dust removal device and flue gas dust removal system using same |
| CN111043605A (en) * | 2019-12-30 | 2020-04-21 | 深圳续盈环保科技有限公司 | Garbage combustion furnace |
| CN211585867U (en) * | 2019-12-30 | 2020-09-29 | 扬州久禄机械制造有限公司 | Fine dust removal device |
Non-Patent Citations (2)
| Title |
|---|
| 张金观: "《改变生活的能源》", 30 June 2020, 上海科学技术文献出版社 * |
| 陈昆柏等: "《固体废物环境管理丛书-危险废物处理与处置》", 31 May 2017, 河南科学技术出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321960A (en) * | 2021-12-07 | 2022-04-12 | 北京科技大学 | Processing system of waste incineration flue gas |
| CN114673994A (en) * | 2022-03-16 | 2022-06-28 | 王惠生 | Combustion method for controlling dioxin resynthesis |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100565009C (en) | Can realize the garbage burning processing method and the device of dioxin and dust zero discharge | |
| CN107461746B (en) | A kind of small-sized domestic garbage pyrolysis gasification oven and purification system | |
| CN113280355A (en) | Flue gas secondary combustion and high-temperature filtering and dedusting integrated device and process | |
| CN201184597Y (en) | Refuse burning processing apparatus capable of implementing zero discharge of dioxins and powder dust | |
| CN107511007A (en) | A kind of boiler dust remover of novel environment friendly dedusting | |
| CN109140451A (en) | A kind of flue gas purifying technique and equipment of the processing of animal innoxious burning | |
| CN209295139U (en) | Refuse disposal installation in a kind of efficient environmental protection treatment work | |
| CN205340465U (en) | High -efficient msw incineration schizolysis gas cleaning system | |
| CN101440311B (en) | Biomass gas purification equipment and process | |
| CN214619560U (en) | Multi-class garbage comprehensive cooperative processing device for urban garbage processing | |
| CN201470284U (en) | Electric-bag combined dust collector | |
| CN108286711A (en) | A kind of domestic garbage pyrolysis processing equipment | |
| CN204943496U (en) | The pyrogenation incinerator of process house refuse and solid waste | |
| CN112919760A (en) | Household garbage municipal sludge and kitchen waste co-processing method and device | |
| CN108862974B (en) | Oil sludge treatment system and method | |
| CN216480999U (en) | Vertical incinerator system | |
| CN105413365B (en) | A kind of air contaminant treatment device and method | |
| CN113375165A (en) | Vertical secondary combustion chamber device | |
| CN208642044U (en) | A kind of flue gas of refuse burning processing system based on multi-tube dust cleaner | |
| CN113262602A (en) | Waste incineration flue gas treatment device | |
| CN106765143A (en) | A kind of small-sized rubbish pyrogenation incinerator and its treating tail gas system and application | |
| CN101584966A (en) | Device provided with chemical reactor therein for jointly removing inhalable particle of coal and heavy metal Hg and method | |
| CN221964844U (en) | Fume purification and discharge device | |
| CN206130988U (en) | Burn waste gas environmental protection processing device | |
| CN205002125U (en) | Energy -concerving and environment -protective waste incinerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210820 |
|
| RJ01 | Rejection of invention patent application after publication |