CN206121378U - Grain bed dust removal catalytic unit - Google Patents
Grain bed dust removal catalytic unit Download PDFInfo
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- CN206121378U CN206121378U CN201620968102.7U CN201620968102U CN206121378U CN 206121378 U CN206121378 U CN 206121378U CN 201620968102 U CN201620968102 U CN 201620968102U CN 206121378 U CN206121378 U CN 206121378U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model discloses a grain bed dust removal catalytic unit, it includes that shell body and the at least one deck grain bed that sets up in the inner chamber of shell body along vertical direction filter the catalyst converter, the upper portion of shell body is provided with the import of dust -laden gas, the lower part of shell body is provided with the dust discharge port, every layer of grain bed filters the catalyst converter and includes at least one filtration catalysis unit, every filters catalysis unit and has dust -laden gas blow vent and net gas blow vent, filter the dust -laden air chamber that catalysis unit was set gradually by top -down, go up the granule filter layer, lower granule filter layer, the stationary flow layer, the catalyst layer, the air -purifying chamber is constituteed, dust -laden gas blow vent sets up on the dust -laden air chamber, the net gas blow vent sets up on the air -purifying chamber, the advantage is under the prerequisite of the equitable structure that does not change present grain bed dust remover, can adopt the integral catalyst catalysis of low resistance high activity to get rid of burnt oil and gas or harmful gas such as organic waste gas or NOx in effective the dust removal.
Description
Technical field
This utility model is related to a kind of dedusting catalysis technique, more particularly, to a kind of grain bed dedusting catalytic unit.
Background technology
Some coal gas or flue gas, not only need chalk dust removing, and also need to remove some harmful gass, such as in heating gas
Tar removing vapour is needed, needs to remove organic exhaust gas (VOC) in industrial waste gas, need to remove NO in flue gasxDeng being removed using high temperature
It is technically feasible that dust is removed in a device simultaneously by dirt technology with harmful gass, is economically rational.
Granular-layer dust precipitator adopts high-temperature resistant particle filtrate, has unique advantage in gas cleaning at high temperature field.
Such as patent of invention " a kind of granular-layer dust precipitator " (Publication No. CN101036846A, the patent of China's bulletin
Number it is ZL200710067109.7), it discloses a kind of granular-layer dust precipitator, including shell body and arrange along short transverse
At least one of which defecator in shell body, the top of shell body are provided with ash-laden gas import, and the lower end of shell body is provided with
Dust outlet, defecator are provided with independent gas reversing arrangement, and net gas house steward and blowback are connected with gas reversing arrangement
Gas house steward, feature are that defecator includes at least one filter element, and filter element includes inner housing, is provided with logical on inner housing
QI KOU and breather, are provided with granular layer and air distribution plate in inner shell body, blow vent is arranged on the top of granular layer, and breather is arranged
In the lower section of granular layer, breather is laterally passed shell body and is connected with gas reversing arrangement；Advantage is the inner shell in dust removal by filtration
Body is surrounded by hot air, and inner housing each several part expands with heat and contract with cold uniformly, and thermal deformation resistant performance is good, makes the cleaner unit can be used in high temperature
And the changeable occasion of temperature, thermal adaptability is strong, applied widely.Defecator in the granular-layer dust precipitator includes parallel connection
During multiple filter elements of arrangement, the continuous filtration of gas is capable of achieving, dust removing effects are more preferable, but the granular-layer dust precipitator is only
Can effectively dedusting, it is impossible to remove removing and harmful gas.
Patent of invention " granular bed gas purifying device and its method " (Publication No. that and for example China announces
CN1647847A, Patent No. ZL200410084485.3), a kind of granular bed gas purifying device and its method are it discloses,
Including housing, the ventilation terminal being arranged in housing and the grain bed on ventilation terminal, it is characterized in grain bed at least by two
Metafiltration material is constituted, and the particle diameter of each metafiltration material successively reduces from top to bottom successively, and the grain density of each metafiltration material is then from upper
And under successively increase successively, and the bed formed when normally fluidizing less than adjacent lower filtrate by filtering material particle density in upper strata is close
Degree, while described each metafiltration material also has common normal fluidisation and mutual immiscible gas speed scope；Advantage is using this dress
When putting dedusting, each metafiltration material in top carries out thick dedusting, and orlop filtrate carries out smart dedusting, that is, integrate coarse-fine and filter；Blowback
During deashing, each metafiltration material is normally fluidized and is not mutually mutually mixed, therefore the dust containing capacity of bed can have both been improved using this device, and can be improved
Filter efficiency, and deashing is simple.The material leakage of orlop filtrate and the blocking to ventilation terminal when the device is considered to use, under most
All the time the current stabilization layer for remaining static, all filter material layers and current stabilization layer are equipped with also in housing between metafiltration material and ventilation terminal
In any layer or multilamellar there is the function of removing such as harmful gass such as sulfur or chlorine in dusty gas, dust can be realized and such as sulfur
Or remove while the harmful gass such as chlorine, but which cannot remove tar removing vapour or organic exhaust gas or NO simultaneouslyxDeng needs by catalysis
The harmful gass that reaction is removed.
For another example utility model patent " granular layer the de-dusting de-nitration integrated " (Publication No. that China announces
CN205287928U, Patent No. ZL201521088838.7), a kind of granular layer de-dusting de-nitration integrated is it discloses,
Including housing and gravel bed filter, described housing upper end is provided with air inlet, lower end and is provided with ash bucket；Set in described housing
There are several to be fixed on the gravel bed filter in inner walls, each gravel bed filter upper surface is sequentially provided with from bottom to top
One current stabilization Catalytic Layer, a heavies layer and a light granules layer；Described housing exterior walls are provided with and corresponding granular layer dedusting
The gas outlet of device connection, each gas outlet are communicated with pipeline three, pipeline four, and pipeline three is provided with valve one, sets on pipeline four
There is valve two；Advantage is not only dedusting, out of stock effect by gravel bed filter and denitration are integrated in the middle of a housing
It is good, many land use areas can be also saved, dedusting denitration process cost is reduced.It is straight that the device also discloses current stabilization Catalytic Layer
Footpath 5～20mm ceramic particles, its surface spraying V2O5Metal-oxide, heavies layer are the ceramic particle of 0.5～0.8mm, gently
Matter granular layer is the ceramic particle of 2～4mm, denitration catalyst of the device using the ceramic grain surface spraying in current stabilization Catalytic Layer
Agent (V2O5Metal-oxide) denitration while dedusting, but problem is the de- of the ceramic grain surface spraying in current stabilization Catalytic Layer
Denox catalyst specific surface area is little, and catalysis activity is low, if obtaining higher denitration efficiency, then by make current stabilization Catalytic Layer thickness and its
The increase of pressure drop several times, decades of times, is irrational in Technological Economy.
Therefore, how using low-resistance high activated catalyst, do not change the Rational structure of existing grain bed cleaner unit, realize removing
It is the problem for needing to solve that dirt is integrated with catalytic purification.
The content of the invention
Technical problem to be solved in the utility model is to provide and a kind of is not changing the reasonable of existing grain bed cleaner unit
On the premise of structure, low-resistance high activity integral catalyzer catalytic elimination tar vapour can be adopted while effective dedusting or be had
Machine waste gas or NOxEtc. the grain bed dedusting catalytic unit of harmful gass.
This utility model solve the technical scheme that adopted of above-mentioned technical problem for：A kind of grain bed dedusting catalytic unit,
At least one of which Bed Filtration catalyst converter being arranged at including shell body and vertically in the inner chamber of described shell body, institute
The top of the shell body stated is provided with the ash-laden gas import connected with upstream inlet pipe, and the bottom of described shell body is provided with powder
Dirt outlet, the Bed Filtration catalyst converter described in per layer include at least one filtration catalytic unit, and the filtration described in each is urged
Change unit and there is ash-laden gas blow vent and net gas blow vent, it is characterised in that：Described filtration catalytic unit by from top to bottom according to
The dust-laden air chamber of secondary setting, the upper particle filtering for coarse filtration dedusting is carried out to the ash-laden gas from described dust-laden air chamber
Layer, the lower particle filter layer for finly filtration dedusting is carried out to the ash-laden gas from described upper particle filter layer, can be uniform
The current stabilization layer of cloth wind, to be used for removing using low-resistance high activity integral catalyzer harmful in the gas of described current stabilization layer
The catalyst layer of gas, air-purifying chamber composition, described ash-laden gas blow vent are arranged on described dust-laden air chamber, described net gas
Blow vent is arranged on described air-purifying chamber；Ash-laden gas by ash-laden gas import enter shell body inner chamber in, shell body it is interior
Ash-laden gas in chamber is entered in ash-laden gas room by ash-laden gas blow vent, the particle filtering on Jing successively of the ash-laden gas in ash-laden gas room
The gas obtained after the coarse filtration dedusting of layer and the finly filtration dedusting of lower particle filter layer enters catalyst layer after current stabilization layer
In, the net gas obtained Jing after the harmful gass that catalyst layer is removed in gas is entered in air-purifying chamber, and the net gas in air-purifying chamber passes through
Net gas blow vent output, and the dust for falling to the bottom of shell body is discharged by dust outlet.
Described catalyst layer is made up of the foraminous support and grid for setting gradually from bottom to top, in described porous
Described low-resistance high activity integral catalyzer is filled with the support of support member in each grid of described grid, described is low
Resistance high activity integral catalyzer is honeycombed catalyst or foamed ceramics catalyst, and described foraminous support is arranged at described
Air-purifying chamber top, described grid is arranged at the lower section of described current stabilization layer.Here, arranging grid in the lower section of current stabilization layer
With foraminous support, be in order to pass through grill support current stabilization layer and its on lower particle filter layer and upper particle filter layer；It is logical
The honeycombed catalyst or foamed ceramics catalyst of filling in each grid of porous supports support grid are crossed, and makes blowback air
Stream obtains pre- distribution；In each grid of grid, the honeycombed catalyst or foamed ceramics catalyst of filling effectively can have been removed
Evil gas, makes more compact structure a little using the honeycombed catalyst of high density holes, and the mechanical strength of foamed ceramics catalyst is more
It is big；Honeycombed catalyst or foamed ceramics catalyst are the integral catalyzers being filled in each grid of grid, activity
Height, therefore compact conformation, can obtain high catalytic efficiency under high-speed, far surpass the granule that active component is sprayed at particle surface
Shape catalyst.
Described foraminous support is flase floor or waffle slab or screen cloth.Here, foraminous support also can select it is existing
Other have the plate of porous, and on the one hand foraminous support is filled in the honeycomb catalyst in each grid of grid for support
Agent or foamed ceramics catalyst, on the other hand in reverse gas cleaning, can carry out air-flow by the aperture of foraminous support and be distributed in advance,
Self-regulation is carried out the blowback air speed between each grid of grid, effectively prevent excessive local gas speed, upper particle filter layer and
Lower particle filter layer local perforations and fluidisation are abnormal.
Described honeycombed catalyst is with TiO2For carrier, the NO with V-W as main activexReducing catalyst
(SCR)；Or described honeycombed catalyst is with γ-Al2O3It is for carrier, organic with noble metal platinum, palladium as main active component
Off-gas oxidizing catalyst；Or described honeycombed catalyst is with Al2O3For carrier, the tar with nickel as main active component splits
Solution catalyst.Here, adopting NOxReducing catalyst can effectively remove the NO in ash-laden gasx；Using organic exhaust gas oxidation catalysiss
Agent can effectively remove the organic exhaust gas in ash-laden gas；The tar in ash-laden gas can be effectively removed using tar cracking catalyst
Vapour.
Described foamed ceramics catalyst is with the foamed ceramics of 30～100ppi as base material, with TiO2For carrier, with V-W
For monoblock type NO of main activexReducing catalyst (SCR)；Or described foamed ceramics catalyst is with 30～100ppi
Foamed ceramics be base material, with γ-Al2O3For carrier, the monoblock type organic exhaust gas with noble metal platinum, palladium as main active component
Oxidation catalyst；Or described foamed ceramics catalyst is with the foamed ceramics of 30～100ppi as base material, with Al2O3For carrier,
Monoblock type tar cracking catalyst with nickel as main active component.Here, adopting monoblock type NOxReducing catalyst can be effective
Remove the NO in ash-laden gasx；The organic exhaust gas in ash-laden gas can be effectively removed using monoblock type organic exhaust gas oxidation catalyst；
The tar vapour in ash-laden gas can be effectively removed using monoblock type tar cracking catalyst.
Bed Filtration catalyst converter described in per layer includes the filtration catalytic unit described in two, described filtration catalytic list
Unit is symmetrically arranged in the both sides of the inner chamber of described shell body, the filtration catalytic unit opposite side described in two for being arranged symmetrically
Between space connect with described ash-laden gas blow vent.The filtration catalytic unit of such same layer is arranged symmetrically in opposite directions, is made
Blowback air when obtaining undermost one of filtration catalytic unit reverse gas cleaning is more easy to be connect by the filtration catalytic unit of same layer
Receive, make blowback air will not upruss and hinder dust settling, so as to save to force suction blowback air to flow downward and set
Put the bleeding point in the bottom of shell body.
Described current stabilization layer includes upper wedge wire screen, granular layer and the lower wedge wire screen for setting gradually from top to bottom, and described is upper
Wedge wire screen and described lower wedge wire screen clamp described granular layer, and the bar seam of described upper wedge wire screen and described lower wedge wire screen
The particle diameter of the granule adopted less than described granular layer by gap.Here, the granular layer clamped by upper wedge wire screen and lower wedge wire screen
(when including abnormal, there is local high gas velocity) under any gas speed will not to be thrown so that the granular layer all-the-time stable is not
Disorderly, effectively ensure the current stabilization layer can even distributing wind, when making filtration, top-down ash-laden gas flows evenly through granule
Filter layer and lower particle filter layer, the blowback air that particularly can make from bottom to top in reverse gas cleaning equably fluidize under granule mistake
Filtering layer and upper particle filter layer；To guarantee that upper wedge wire screen and lower wedge wire screen can clamp granular layer, it is desirable to upper wedge wire screen and lower bar
The particle diameter of the granule adopted less than granular layer by the bar gap of slotted screen.
The particle diameter of the granule employed in described upper particle filter layer is more than employed in described lower particle filter layer
Granule particle diameter, the density of the granule in described upper particle filter layer is less than the granule in described lower particle filter layer
Density.Here, it is desirable to which the particle diameter of the granule employed in upper particle filter layer is more than the granule employed in lower particle filter layer
Particle diameter, and require the density of the density less than the granule in lower particle filter layer of granule in upper particle filter layer, such energy
Enough coarse filtration is first carried out to ash-laden gas to carry out fine filtering again, dust removal by filtration is better, and after reverse gas cleaning lower particle filter layer with
Upper particle filter layer is not mutually mutually mixed.
Net gas breather is connected with described net gas blow vent, described net gas breather stretches out described shell body
Outward, and respectively net gas branch pipe and blowback arm are connected with by switching valve；When filtration catalytic unit is filtered, net gas breather Jing cuts
Change valve to connect with net gas branch pipe, the net gas being filtrated to get is drawn out to into net gas house steward；During filtration catalytic unit reverse gas cleaning, net gas
Breather Jing switching valves are connected with blowback arm, and blowback air is blasted filtration catalytic unit, make lower particle filter layer and upper granule
Filter layer blowback fluidizes deashing.
The bottom of described shell body is provided with bleeding point, and described bleeding point passes through gas circulation line and circulating fan
Connect with described upstream inlet pipe, on described upstream inlet pipe, be provided with drainage powder body inlet.Here, being taken out by arranging
QI KOU can make the ash-laden gas in the inner chamber of shell body force the bottom for guiding shell body into, promote dust settling, and reduce grain bed
Dedusting catalytic unit upper and lower temperature difference；When dust contained in ash-laden gas is the sub-micrometer grain period of the day from 11 p.m. to 1 a.m, can be from being arranged at upstream inlet
Drainage powder body inlet injection drainage powder body on pipe, drainage powder body can not only play the filtrating aid function that dirt is filtered with dirt, Er Qieya
Micron particle adheres to and is conducive to settling in shell body and being smoothly discharged out on drainage powder body；Drainage powder body can be Calx
Or flyash or other micron-sized powders.
The grain bed dedusting catalytic unit also includes hopper, and described hopper is arranged at the bottom of described shell body, institute
The hopper stated is connected with described dust outlet, and the bottom of described hopper is provided with discharge port.Here, arrange hopper be for
The dust discharged is collected from dust outlet more easily.
Compared with prior art, the utility model has the advantage of：
1) this utility model does not change upper granule by an independent catalyst layer is arranged between current stabilization layer and air-purifying chamber
Original stacked configuration of filter layer, lower particle filter layer and current stabilization layer realizes dedusting, using using low-resistance high activated catalyst
Catalyst layer harmful gass such as tar vapour or organic exhaust gas or NO in gas are simultaneously effectively removed under high-speedxDeng.
2) this utility model adopts high-specific surface area, the honeycombed catalyst of high voidage or foamed ceramics catalyst, no
Only activity is high, compact conformation, monolithic construction low cost, and it is little to hinder drop.
Description of the drawings
Fig. 1 is the structural representation of grain bed dedusting catalytic unit of the present utility model；
Fig. 2 is upper particle filter layer in grain bed dedusting catalytic unit of the present utility model, lower particle filter layer, current stabilization
The composition schematic diagram of layer and each layer of catalyst layer.
Specific embodiment
This utility model is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment one：
The present embodiment proposes a kind of grain bed dedusting catalytic unit, and as depicted in figs. 1 and 2, which includes shell body 1, edge
Vertical direction is arranged at six layers of Bed Filtration catalyst converter and hopper 3 in the inner chamber of shell body 1, and the top of shell body 1 is arranged
The bottom for having the ash-laden gas import 11 connected with upstream inlet pipe (not shown), shell body 1 is provided with dust outlet 12,
Hopper 3 is arranged at the bottom of shell body 1, and hopper 3 is connected with dust outlet 12, and the bottom of hopper 3 is provided with discharge port 31, often
Layer Bed Filtration catalyst converter includes two filtration catalytic units 2, and each filtration catalytic unit 2 has an ash-laden gas blow vent
21 and a net gas blow vent 22, two filtration catalytic units 2 are symmetrically arranged in the both sides of the inner chamber of shell body 1, are arranged symmetrically
Two 2 opposite sides of filtration catalytic unit between space connect with ash-laden gas blow vent 21, the filtration of such same layer
Catalyst unit 2 is arranged symmetrically in opposite directions so that blowback air during undermost one of 2 reverse gas cleaning of filtration catalytic unit is more easy to
Received by the filtration catalytic unit 2 of same layer, make blowback air will not upruss and hinder dust settling, so as to save as strong
System aspirates the bleeding point that blowback air flows downward and is arranged on the bottom of shell body 1；Filtration catalytic unit 2 is by from top to bottom successively
The dust-laden air chamber 23 of setting, the upper particle filter layer 24 for coarse filtration dedusting is carried out to the ash-laden gas from dust-laden air chamber 23,
For the lower particle filter layer 25 of finly filtration dedusting being carried out to the ash-laden gas from upper particle filter layer 24, being capable of even distributing wind
Current stabilization layer 26, urging for harmful gass of the removing in the gas of current stabilization layer 26 is used for using low-resistance high activity integral catalyzer
Agent layer 27, air-purifying chamber 28 are constituted, i.e., current stabilization layer 26 is directly layed on catalyst layer 27, and lower particle filter layer 25 is directly laid
On current stabilization layer 26, upper particle filter layer 24 is directly layed in lower particle filter layer 25, and dust-laden air chamber 23 is arranged at granule
The top of filter layer 24, air-purifying chamber 28 are arranged at the lower section of catalyst layer 27, and ash-laden gas blow vent 21 is arranged at dust-laden air chamber 23
On, net gas blow vent 22 is arranged on air-purifying chamber 28, and ash-laden gas is entered by ash-laden gas import 11 in the inner chamber of shell body 1, outward
Ash-laden gas in the inner chamber of housing 1 is entered in dust-laden air chamber 23 by ash-laden gas blow vent 21, the ash-laden gas in dust-laden air chamber 23
The gas for obtaining Jing after the upper coarse filtration dedusting of particle filter layer 24 and the finly filtration dedusting of lower particle filter layer 25 successively is passed through
Enter after current stabilization layer 26 in catalyst layer 27, the net gas obtained Jing after the harmful gass that catalyst layer 27 is removed in gas enters net
In air chamber 28, the net gas in air-purifying chamber 28 is exported by net gas blow vent 22, and the dust for falling to the bottom of shell body 1 passes through
Dust outlet 12 is discharged.
In this particular embodiment, catalyst layer 27 is by the foraminous support 271 and grid 272 for setting gradually from bottom to top
Composition, is filled with low-resistance high activity integral catalyzer in each grid of the support Under The Grille 272 of foraminous support 271,
Low-resistance high activity integral catalyzer is honeycombed catalyst, and foraminous support 271 is arranged at the top of air-purifying chamber 28, grid
272 lower sections for being arranged at current stabilization layer 26.Here, arrange grid 272 and foraminous support 271 in the lower section of current stabilization layer 26, be for
By grid 272 support current stabilization layer 26 and its on lower particle filter layer 25 and upper particle filter layer 24；By porous
The honeycombed catalyst of filling in each grid of 271 supportive grid 272 of support member, and make blowback air-flow obtain pre- distribution；Grid
In 272 each grid, the honeycombed catalyst of filling can effectively remove removing and harmful gas, and cellular using high density holes is urged
Agent makes structure more compact.Here, foraminous support 271 can select flase floor or waffle slab or screen cloth etc.；Honeycomb catalyst
Agent is with TiO2For carrier, the NO with V-W as main activexReducing catalyst (SCR), NOxWith NH3Catalytic reduction reaction,
Make NOxIt is reduced to N2, effectively eliminate the NO in ash-laden gasx, the hole density of honeycombed catalyst is cpsi86.Here, catalyst
The thickness of layer 27 is designed as 100 millimeters.
In this particular embodiment, current stabilization layer 26 includes upper wedge wire screen 261, the granular layer 262 for setting gradually from top to bottom
With lower wedge wire screen 263, upper wedge wire screen 261 and lower wedge wire screen 263 clamp granular layer 262, and upper wedge wire screen 261 and lower wedge wire screen
The particle diameter of the granule adopted less than granular layer 262 by 263 bar gap.Here, by upper wedge wire screen 261 and lower wedge wire screen 263
Under any gas speed (there is local high gas velocity when including abnormal) and will not be thrown in the granular layer 262 clamped so that this
262 all-the-time stable of granulosa not disorderly, effectively ensure the current stabilization layer 26 can even distributing wind, top-down dust-laden when making filtration
Gas flows evenly through particle filter layer 24 and lower particle filter layer 25, and particularly can make from bottom to top in reverse gas cleaning is anti-
The lower particle filter layer 25 of equably fluidisation of blowing and upper particle filter layer 24；To guarantee upper wedge wire screen 261 and lower 263 energy of wedge wire screen
Enough clamp granular layer 262, it is desirable to the bar gap of upper wedge wire screen 261 and lower wedge wire screen 263 less than granular layer 262 adopted
The particle diameter of grain.Here, the granule in granular layer 262 is from the sea sand that mean diameter is 1.5～3 millimeters.
In this particular embodiment, the particle diameter of the granule employed in upper particle filter layer 24 is more than lower particle filter layer 25
Employed in granule particle diameter, the density of the granule in upper particle filter layer 24 is less than the granule in lower particle filter layer 25
Density.Here, it is desirable to which the particle diameter of the granule employed in upper particle filter layer 24 is more than employed in lower particle filter layer 25
The density of the granule in the particle diameter of granule, and the upper particle filter layer 24 of requirement is close less than the granule in lower particle filter layer 25
Degree, so coarse filtration first can be carried out to ash-laden gas carries out fine filtering again, and dust removal by filtration is better, and lower granule after reverse gas cleaning
Filter layer is not mutually mutually mixed with upper particle filter layer.Here, the granule employed in upper particle filter layer 24 is 1 from mean diameter
～3 millimeters of expanded perlite granule, the granule employed in lower particle filter layer 25 are 0.3～0.8 milli from mean diameter
The sea sand of rice.
In this particular embodiment, net gas breather 4 is connected with net gas blow vent 22, net gas breather 4 stretches out shell
Outside body 1, and net gas branch pipe (not shown) and blowback arm are connected with by switching valve (not shown) (in figure not respectively
Illustrate).When filtration catalytic unit 2 is filtered, 4 Jing switching valves of net gas breather are connected with net gas branch pipe, by the net gas being filtrated to get
It is drawn out to net gas house steward；During filtration catalytic 2 reverse gas cleaning of unit, 4 Jing switching valves of net gas breather are connected with blowback arm, will be anti-
Air blowing blasts filtration catalytic unit 2, makes lower particle filter layer 25 and 24 blowback of upper particle filter layer fluidisation deashing.
In this particular embodiment, the bottom of shell body 1 is provided with bleeding point 13, and bleeding point 13 passes through gas circulation line
(not shown) and circulating fan (not shown) are connected with upstream inlet pipe, and drainage powder body is provided with upstream inlet pipe
Inlet (not shown).Here, force can the ash-laden gas in the inner chamber of shell body 1 by setting bleeding point guides shell into
The bottom of body 1, promotes dust settling, and reduces grain bed dedusting catalytic unit upper and lower temperature difference；When dust contained in ash-laden gas
The sub-micrometer grain period of the day from 11 p.m. to 1 a.m is, can be from the drainage powder body inlet injection drainage powder body being arranged on upstream inlet pipe, drainage powder body
The filtrating aid function that dirt is filtered with dirt can be not only played, and submicron particle is adhered to and is conducive on drainage powder body in shell body 1
Sedimentation is simultaneously smoothly discharged out；Drainage powder body can be Calx or flyash or other micron-sized powders.
Dust content in the net gas that ash-laden gas is obtained Jing after the grain bed dedusting catalytic unit of the present embodiment is processed is less than
10mg/Nm3, temperature is 300～400 DEG C, air speed is 10000h-1～15000h-1When NOxRemoval efficiency is 85～93%.
Embodiment two：
The structure of the grain bed dedusting catalytic unit that the present embodiment is proposed and the grain bed dedusting catalytic unit of embodiment one
Structure it is essentially identical, difference is：Fill in each grid of the support Under The Grille 272 of foraminous support 271
Honeycombed catalyst is with γ-Al2O3For carrier, the organic exhaust gas oxidation catalysiss with noble metal platinum, palladium as main active component
Agent, can effectively remove the organic exhaust gas in ash-laden gas using organic exhaust gas oxidation catalyst.
Dust content in the net gas that dust-laden industrial waste gas is obtained Jing after the grain bed dedusting catalytic unit of the present embodiment is processed
Less than 10mg/Nm3, temperature is 300～350 DEG C, air speed is 10000h-1～20000h-1When chlorobenzene removal efficiency be 90～92%.
Embodiment three：
The structure of the grain bed dedusting catalytic unit that the present embodiment is proposed and the grain bed dedusting catalytic unit of embodiment one
Structure it is essentially identical, difference is：Fill in each grid of the support Under The Grille 272 of foraminous support 271
Honeycombed catalyst is with Al2O3For carrier, the tar cracking catalyst with nickel as main active component, urged using coke tar cracking
Agent can effectively remove the tar vapour in ash-laden gas.
Dust content in the net gas that dust-laden heating gas is obtained Jing after the grain bed dedusting catalytic unit of the present embodiment is processed is little
In 10mg/Nm3, temperature is 800～850 DEG C, air speed is 10000h-1～15000h-1When tar analogies removal efficiency be 85～
90%.
Example IV：
The structure of the grain bed dedusting catalytic unit that the present embodiment is proposed and the grain bed dedusting catalytic unit of embodiment one
Structure it is essentially identical, difference is：Fill in each grid of the support Under The Grille 272 of foraminous support 271
It is the bigger foamed ceramics catalyst of mechanical strength, foamed ceramics catalyst is with the foamed ceramics of 45ppi as base material, with TiO2
For carrier, monoblock type NO with V-W as main activexReducing catalyst (SCR), using monoblock type NOxReducing catalyst energy
Enough NO effectively removed in ash-laden gasx；The thickness of catalyst layer is designed as 120 millimeters.
Dust content in the net gas that ash-laden gas is obtained Jing after the grain bed dedusting catalytic unit of the present embodiment is processed is less than
10mg/Nm3, temperature is 300～400 DEG C, air speed is 8000h-1～12000h-1When NOxRemoval efficiency is 84～91%.
Embodiment five：
The structure of the grain bed dedusting catalytic unit that the present embodiment is proposed and the grain bed dedusting catalytic unit of example IV
Structure it is essentially identical, difference is：Fill in each grid of the support Under The Grille 272 of foraminous support 271
Foamed ceramics catalyst is with the foamed ceramics of 45ppi as base material, with γ-Al2O3For carrier, lived with noble metal platinum, palladium as main
The monoblock type organic exhaust gas oxidation catalyst of property component, can effectively remove dust-laden using monoblock type organic exhaust gas oxidation catalyst
Organic exhaust gas in gas.
Dust content in the net gas that dust-laden industrial waste gas is obtained Jing after the grain bed dedusting catalytic unit of the present embodiment is processed
Less than 10mg/Nm3, temperature is 300～350 DEG C, air speed is 10000h-1～18000h-1When chlorobenzene removal efficiency be 88～92%.
Embodiment six：
The structure of the grain bed dedusting catalytic unit that the present embodiment is proposed and the grain bed dedusting catalytic unit of example IV
Structure it is essentially identical, difference is：Fill in each grid of the support Under The Grille 272 of foraminous support 271
Foamed ceramics catalyst is with the foamed ceramics of 45ppi as base material, with Al2O3For carrier, the entirety with nickel as main active component
Formula tar cracking catalyst, can effectively remove the tar vapour in ash-laden gas using monoblock type tar cracking catalyst.
Dust content in the net gas that dust-laden heating gas is obtained Jing after the grain bed dedusting catalytic unit of the present embodiment is processed is little
In 10mg/Nm3, temperature is 800～850 DEG C, air speed is 8000h-1～12000h-1When tar analogies removal efficiency be 83～
90%.
Claims (10)
1. a kind of grain bed dedusting catalytic unit, including shell body and vertically it is arranged in the inner chamber of described shell body
At least one of which Bed Filtration catalyst converter, the top of described shell body is provided with the ash-laden gas connected with upstream inlet pipe and is entered
Mouthful, the bottom of described shell body is provided with dust outlet, and the Bed Filtration catalyst converter described in per layer includes at least one
Filtration catalytic unit, the filtration catalytic unit described in each have ash-laden gas blow vent and net gas blow vent, it is characterised in that：Institute
The filtration catalytic unit stated is by the dust-laden air chamber for setting gradually from top to bottom, for the ash-laden gas from described dust-laden air chamber
Carry out the upper particle filter layer of coarse filtration dedusting, remove for finly filtration being carried out to the ash-laden gas from described upper particle filter layer
The lower particle filter layer of dirt, the current stabilization layer for being capable of even distributing wind, using low-resistance high activity integral catalyzer be used for removing from
The catalyst layer of the harmful gass in the gas of described current stabilization layer, air-purifying chamber composition, described ash-laden gas blow vent are arranged at
On described dust-laden air chamber, described net gas blow vent is arranged on described air-purifying chamber.
2. a kind of grain bed dedusting catalytic unit according to claim 1, it is characterised in that：Described catalyst layer is by certainly
The foraminous support set gradually on down and grid composition, under the support of described foraminous support, described grid is every
Described low-resistance high activity integral catalyzer is filled with individual grid, described low-resistance high activity integral catalyzer is honeycomb
Shape catalyst or foamed ceramics catalyst, described foraminous support are arranged at the top of described air-purifying chamber, described grid
It is arranged at the lower section of described current stabilization layer.
3. a kind of grain bed dedusting catalytic unit according to claim 2, it is characterised in that：Described foraminous support is
Flase floor or waffle slab or screen cloth.
4. a kind of grain bed dedusting catalytic unit according to Claims 2 or 3, it is characterised in that：It is described cellular to urge
Agent is with TiO2For carrier, the NO with V-W as main activexReducing catalyst；Or described honeycombed catalyst be with
γ-Al2O3For carrier, the organic exhaust gas oxidation catalyst with noble metal platinum, palladium as main active component；Or it is described cellular
Catalyst is with Al2O3For carrier, the tar cracking catalyst with nickel as main active component.
5. a kind of grain bed dedusting catalytic unit according to Claims 2 or 3, it is characterised in that：Described foamed ceramics
Catalyst is with the foamed ceramics of 30～100ppi as base material, with TiO2For carrier, the monoblock type with V-W as main active
NOxReducing catalyst；Or described foamed ceramics catalyst is with the foamed ceramics of 30～100ppi as base material, with γ-Al2O3
For carrier, the monoblock type organic exhaust gas oxidation catalyst with noble metal platinum, palladium as main active component；Or described foamed ceramics
Catalyst is with the foamed ceramics of 30～100ppi as base material, with Al2O3For carrier, the monoblock type with nickel as main active component
Tar cracking catalyst.
6. a kind of grain bed dedusting catalytic unit according to claim 1, it is characterised in that：Grain bed mistake described in per layer
Filter catalyst converter includes the filtration catalytic unit described in two, and described filtration catalytic unit is symmetrically arranged in described shell body
The both sides of inner chamber, the space between filtration catalytic unit opposite side described in two for being arranged symmetrically are logical with described ash-laden gas
QI KOU is connected.
7. a kind of grain bed dedusting catalytic unit according to claim 1 or 6, it is characterised in that：Described current stabilization layer bag
Include upper wedge wire screen, granular layer and the lower wedge wire screen for setting gradually from top to bottom, described upper wedge wire screen and described lower wedge wire screen
Described granular layer is clamped, and the bar gap of described upper wedge wire screen and described lower wedge wire screen is less than described granular layer institute
Using granule particle diameter.
8. a kind of grain bed dedusting catalytic unit according to claim 7, it is characterised in that：Described upper particle filter layer
Employed in granule particle diameter more than the granule employed in described lower particle filter layer particle diameter, described upper granule mistake
Density of the density of the granule in filtering layer less than the granule in described lower particle filter layer.
9. a kind of grain bed dedusting catalytic unit according to claim 1 and 2, it is characterised in that：Described net gas ventilation
Net gas breather is connected with mouthful, described net gas breather stretches out described shell in vitro, and connects by switching valve respectively
There are net gas branch pipe and blowback arm；The bottom of described shell body is provided with bleeding point, and described bleeding point is circulated by gas
Pipeline and circulating fan are connected with described upstream inlet pipe, and drainage powder body inlet is provided with described upstream inlet pipe.
10. a kind of grain bed dedusting catalytic unit according to claim 1 and 2, it is characterised in that：The grain bed dedusting is urged
Makeup is put, and described hopper is arranged at the bottom of described shell body, and described hopper is arranged with described dust
Outlet, the bottom of described hopper are provided with discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620968102.7U CN206121378U (en) | 2016-08-29 | 2016-08-29 | Grain bed dust removal catalytic unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620968102.7U CN206121378U (en) | 2016-08-29 | 2016-08-29 | Grain bed dust removal catalytic unit |
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| Publication Number | Publication Date |
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| CN206121378U true CN206121378U (en) | 2017-04-26 |
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| CN201620968102.7U Withdrawn - After Issue CN206121378U (en) | 2016-08-29 | 2016-08-29 | Grain bed dust removal catalytic unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237751A (en) * | 2016-08-29 | 2016-12-21 | 宁波大学 | A kind of grain bed dedusting catalytic unit |
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2016
- 2016-08-29 CN CN201620968102.7U patent/CN206121378U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237751A (en) * | 2016-08-29 | 2016-12-21 | 宁波大学 | A kind of grain bed dedusting catalytic unit |
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