CN109028110A - A kind of oxidation unit and its packing method of the fill containing Combined porous medium - Google Patents
A kind of oxidation unit and its packing method of the fill containing Combined porous medium Download PDFInfo
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- CN109028110A CN109028110A CN201810825918.8A CN201810825918A CN109028110A CN 109028110 A CN109028110 A CN 109028110A CN 201810825918 A CN201810825918 A CN 201810825918A CN 109028110 A CN109028110 A CN 109028110A
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- heat storage
- heat
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- accumulation
- porous medium
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- 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
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
Abstract
The invention belongs to coal mine gas processing technology fields, it is related to the oxidation unit and its packing method of a kind of fill containing Combined porous medium, including heat accumulation incinerator, blower and chimney, inlet plenum below first heat storage and the second heat storage is connected to by the admission line with intake valve with blower respectively, inlet plenum below first heat storage and the second heat storage is connected to by the outlet pipe with air outlet valve with chimney respectively, it is followed successively by the water absorption layer filled with water-absorbent material from top to bottom in first heat storage and the second heat storage, the catalyst coatings of evenly dispersed catalyst in recuperation layer and accumulation of heat filler filled with inertia accumulation of heat filler, the top of heat accumulation incinerator is the combustion chamber for installing burner, exhaust gases passes are opened up above combustion chamber, it solves in heat storage in the prior art and is stuffed entirely with inert filler, it is easy the steam so that in coal mine gas Into heat storage, the problem of reducing the catalytic efficiency of catalyst in heat storage, reduce to coal mine gas purification efficiency and thermal energy recovering effect.
Description
Technical field
The invention belongs to coal mine gas processing technology fields, are related to a kind of oxidation dress of fill containing Combined porous medium
It sets and its packing method.
Background technique
Coal mine gas (also known as " coal bed gas ") is preservation in coal seam and its country rock, is existed with absorption or free state
, with methane Unconventional gas as main component.China's coal bed gas resource is abundant, according to known to new round of resources evaluation: I
2000 meters of state is about 36.81 tcms with shallow Coal bed gas project, is equivalent to 49,000,000,000 tons of standard coals, arranges third place in the world
Position.But it is that coal bed gas gas output per well is too low that current China's cbm development industry development, which has the reality that can not ignore, economical
Benefit is lower, and industry faces in straitened circumstances.Coalmine ventilation gas and concentration are lower than 8% mash gas extraction, and discharge amount is big and utilization efficiency
Low, emptying for a long time causes huge energy waste, and the discharge of the gas significantly enhances greenhouse effects.Using watt
This regenerative oxidation technology by ventilation air gas and concentration lower than 8% or can not by conventional route using gas carry out at destruction
Reason, has great importance for energy conservation and environmental protection.
There are many processing method of coal mine gas, and heat, which incinerates to decompose, is important one of method, and heat accumulation incinerator is wherein
One kind, the characteristic of heat accumulation incinerator are that heat time efficiency can be up to 90% or more.Heat accumulation incinerator is configured with heat storage tank, heat storage tank
Interior filling heat storage preheats volatility coal mine Gas-Flow through heat storage, and then volatility coal mine gas enters combustion chamber, this
When, since the indoor heater that burns generates auxiliary thermal energy, so that combustion chamber is kept certain high temperature (such as 850 DEG C), meet
VOCs ingredient oxygenolysis.It completes after decomposing, the cooling heat storage of the clean gas and another part of high temperature carries out heat exchange, heat
These heat storages are made to be rapidly heated after exchange, for use as the charge heating of subsequent cycle；But in practice, current accumulation of heat
Still there are many missings in cremation facilities, bulky if structure is relative complex, operation operation and maintenance are inconvenient, and in furnace body
Its purification efficiency and thermal energy recovering effect wait to reinforce when interior combustion reaction.
Application No. is 201810242790.2 patents of invention to disclose a kind of oxygen of fill containing Combined porous medium
Makeup is set, including catalyst container, the first heat storage and the second heat storage, and the first catalyst chamber and the second catalyst chamber are equipped in catalyst container,
And first catalyst chamber and the second catalyst chamber be symmetrical arranged, be filled with catalyst in the first catalyst chamber and the second catalyst chamber, first
Heat storage is connected to the first catalyst chamber by air inlet pipe, and the second catalyst chamber is connected to the second heat storage, the first heat storage by escape pipe
It is connected to exhaust piping with the second heat storage inlet end, the first heat storage and the second heat storage outlet side are connected to exhaust pipe,
Catalyst container is also connected to exhaust pipe, this contains the oxidation unit novel in structural design of Combined porous medium fill, can be realized
High efficiency processing to organic exhaust gas, reduces exhaust emission, good environmental protection, but this contains Combined porous medium fill
Oxidation unit heat storage in be stuffed entirely with the heat storage of inert filler, when processing suitable for coal mine gas, due to coal mine
Gas can carry steam when entering heat storage, will affect the catalytic performance of catalyst after catalyst absorption steam, reduce to entire
The available energy of system reduces purification efficiency of the oxidation unit for coal mine gas of the fill containing Combined porous medium
With thermal energy recovering effect.
Summary of the invention
In view of this, the present invention is easy to solve to be stuffed entirely with inert filler in heat storage in the prior art so that coal
Steam in mine gas enters heat storage, reduces the catalytic efficiency of catalyst in heat storage, reduces to coal mine gas purification efficiency
The problem of with thermal energy recovering effect, provides the oxidation unit and its packing method of a kind of fill containing Combined porous medium.
In order to achieve the above objectives, the present invention provides a kind of oxidation unit of fill containing Combined porous medium, including stores
Hot incinerator, blower and chimney are fixedly installed in the middle part of heat accumulation incinerator heat accumulation incinerator being divided into the first heat storage and the
Inlet plenum below the heat storage tank of two heat storages, the first heat storage and the second heat storage passes through the admission line with intake valve respectively
It is connected to blower, the inlet plenum below the first heat storage and the second heat storage passes through outlet pipe and chimney with air outlet valve respectively
It is connected to, is followed successively by the water absorption layer filled with water-absorbent material in the first heat storage and the second heat storage from top to bottom, is filled with inertia
The catalyst coatings of evenly dispersed catalyst, water absorption layer, recuperation layer and catalyst coatings in the recuperation layer and accumulation of heat filler of accumulation of heat filler
Aperture be gradually increased, the top of heat accumulation incinerator is the combustion chamber for being equipped with burner, and it is logical that flue gas is offered above combustion chamber
Road.
The packing method of fill in a kind of oxidation unit of the fill containing Combined porous medium, comprising the following steps:
A, the water absorption layer that will be filled with water-absorbent material is laid on the bottom of the first heat storage and the second heat storage above inlet plenum
Portion keeps uniformly and smooth, it is ensured that all cover the upper surface of inlet plenum below the first heat storage and the second heat storage；
B, the recuperation layer that will be filled with inertia accumulation of heat filler is laid on water absorption layer, keeps uniformly and smooth, it is ensured that all
Cover the upper surface of water absorption layer；
C, the catalyst coatings of catalyst evenly dispersed in accumulation of heat filler are laid on recuperation layer, keep uniformly and smooth,
Ensure all to cover the upper surface of recuperation layer, the top of recuperation layer is the combustion chamber for being equipped with burner.
Further, in recuperation layer and catalyst coatings filler passage overall structure be cuboid or square honeycomb
Shape, the cross-sectional shape of filler passage are a kind of in regular polygon or circle.
Further, in recuperation layer and catalyst coatings filler passage overall structure be cuboid or square honeycomb
Shape, the cross-sectional shape of filler passage are regular hexagon.
Further, the material of water absorption layer is corpuscular gamma-alumina.
Further, the catalyst adulterated in catalyst coatings is platinum palladium class catalyst, and the carrier of platinum palladium metal is in catalyst
Mesh number is the cordierite of 100 mesh, and platinum palladium metal load capacity mass fraction is 0.3%, platinum: the ratio of palladium is 6: 1, in catalyst coatings
The deactivation temperature of catalyst is less than 900 DEG C.
Further, the exhaust pipe for being equipped with manual gate valve and pneumatic stopping valve is connected between blower and chimney.
Further, the first heat storage and the second heat storage are symmetrical arranged and structure is completely the same, the first heat storage and second
Inlet plenum below heat storage is in back taper.
Further, high-temperature flue gas regulating valve is connected on exhaust gases passes.
Further, the shell internal layer material of heat accumulation incinerator is steel alloy, and outer layer material is high-alumina.
The beneficial effects of the present invention are:
1, the oxidation unit of the fill disclosed in this invention containing Combined porous medium, the first heat storage and the second accumulation of heat
Be inlet plenum below body, be followed successively by from top to bottom in the first heat storage and the second heat storage water absorption layer filled with water-absorbent material,
The catalyst coatings of evenly dispersed catalyst in recuperation layer and accumulation of heat filler filled with inertia accumulation of heat filler, in the first heat storage and
Second heat storage arranged beneath is equipped with the water absorption layer of hydroscopic high-molecular resin, and water absorption layer can will enter inlet plenum from admission line
Moisture in gas is adsorbed, and (high-temperature gas can be carried out desorption and regeneration, circulation benefit by water absorption layer when gas reverse backflow
With), it is this that catalyst absorption moisture in catalyst coatings is avoided to the pretreated method of gas progress by water absorption layer, it influences to urge
The catalytic performance of agent；Simultaneously because the moisture latent heat of vaporization is larger, this measure can avoid moisture and inhale in recuperation layer and catalyst coatings evaporation
Heat reduces the availability of thermal energy in whole system.
2, the oxidation unit of the fill disclosed in this invention containing Combined porous medium, compared to all filling inert fillers
Heat storage increase catalyst coatings so that the oxidation reaction initial temperature of coal mine gas is lower, and it is arranged in high-temperature region, meaning
Taste inside whole device the mean temperature of heat storage to be lower than the mean temperature of inertia accumulation of heat filler, heat accumulation incinerator can be increased
The export ratio of heat in outer exhaust gases passes improves utilization efficiency of heat energy；Simultaneously when meeting identical heating demand, compared to complete
The heat storage of inert filler is loaded in portion, can save heat storage loadings, reduces heat accumulation incinerator equipment overall dimensions, and save and add
Work manufactures machine cost.
3, the oxidation unit of the fill disclosed in this invention containing Combined porous medium, the catalysis adulterated in catalyst coatings
Agent is platinum palladium class catalyst, and the carrier of platinum palladium metal is the cordierite that mesh number is 100 mesh, platinum palladium metal load capacity matter in catalyst
Measuring score is 0.3%, platinum: the ratio of palladium is 6: 1, and the deactivation temperature of catalyst is less than 900 DEG C in catalyst coatings, catalyst coatings pair
Running temperature has more rigors, need to control at 900 DEG C hereinafter, the control algolithm that characteristic need to be arranged avoids overtemperature from losing catalysis
Activity.Catalyst coatings no longer have catalytic properties after inactivation, will become common accumulation of heat filler, it will reduce the defeated of whole system
Thermal energy power is unable to satisfy heating demand demand, while catalyst also has certain toxicity, can generate some potential safety problems.
4, the oxidation unit of the fill disclosed in this invention containing Combined porous medium, the catalyst in catalyst coatings are equal
In even dispersion accumulation of heat filler, the aperture of water absorption layer, recuperation layer and catalyst coatings is gradually increased, and is filled out in recuperation layer and catalyst coatings
The structure type in material channel is honeycomb, and the cross-sectional shape of filler passage is preferably regular hexagon, and main cause is phase
When than handling same flow gas, there is more superior heat exchange property, smaller using the honeycomb filler of regular hexagonal cross section
Flow resistance considers the versatility of processing and fabricating and realizes difficulty, do not take into account that the cross-sectional shape of more polygon, and is increased
Edged number can't be higher by too much in the superiority of heat exchange and resistance factor than regular hexagon, and can lose thermal shock resistance.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Fig. 1 is the oxidation unit structural schematic diagram of the fill of the invention containing Combined porous medium.
Specific embodiment
Below in conjunction with attached drawing, a preferred embodiment of the present invention will be described in detail.
Appended drawing reference in Figure of description includes:
Combustion chamber 1, heat accumulation incinerator 2, catalyst coatings 3, recuperation layer 4, inlet plenum 5, chimney 6, the second air outlet valve 7, second
Intake valve 8, the first air outlet valve 9, the first intake valve 10, manual gate valve 11, pneumatic stopping valve 12, blower 13, burner 14, flue gas
Channel 15, water absorption layer 16, high-temperature flue gas regulating valve 17.
The oxidation unit of the fill containing Combined porous medium as shown in Figure 1, including heat accumulation incinerator 2,13 and of blower
Chimney 6, the shell internal layer material of heat accumulation incinerator 2 are steel alloy, and outer layer material is high-alumina, internal steel alloy with a thickness of
1~2mm, external ceramic thickness are 1.5 times of steel alloy thickness hereinafter, the accumulation of heat incinerator of this double-layer structure can more improve
The heat storage performance of heat storage in accumulation of heat incinerator increases accumulation of heat exotherm rate and regenerative capacity, shortens thermal storage time, reduces equipment
Spoilage, improve the service life of equipment.
It is fixedly installed in the middle part of heat accumulation incinerator 2 and heat accumulation incinerator 2 is divided into the first heat storage and the second heat storage
Heat storage tank, the first heat storage and the second heat storage are symmetrical arranged and structure is completely the same.Inlet plenum 5 below first heat storage is logical
The admission line for crossing the first intake valve of band 10 is connected to blower 13, and the inlet plenum 5 below the second heat storage passes through the second air inlet of band
The admission line of valve 8 is connected to blower 13, and the inlet plenum 5 below the first heat storage passes through the outlet pipe of the first air outlet valve of band 9
It being connected to chimney 6, the inlet plenum 5 below the second heat storage is connected to by the outlet pipe of the second air outlet valve of band 7 with chimney 6, the
Inlet plenum 5 below one heat storage and the second heat storage is in back taper.In first heat storage and the second heat storage from top to bottom according to
It is secondary for the water absorption layer 16 filled with water-absorbent material, evenly dispersed in recuperation layer 4 and accumulation of heat filler filled with inertia accumulation of heat filler
The catalyst coatings 3 of catalyst, the material of water absorption layer 16 are the hydroscopic high-molecular resin of polyacrylate.Water absorption layer 16 can incite somebody to action
The moisture entered in 5 gas of inlet plenum from admission line is adsorbed, and (water absorption layer 16 can be by High Temperature Gas when gas reverse backflow
Body carries out desorption and regeneration, recycles), it is this that catalyst coatings are avoided to the pretreated method of gas progress by water absorption layer 16
Catalyst absorbs moisture in 3, influences the catalytic performance of catalyst；Simultaneously because the moisture latent heat of vaporization is larger, this measure can avoid moisture
In 3 evaporation endothermic of recuperation layer 4 and catalyst coatings, the availability of thermal energy in whole system is reduced.That adulterates in catalyst coatings 3 urges
Agent is platinum palladium class catalyst, and the carrier of platinum palladium metal is the cordierite that mesh number is 100 mesh, platinum palladium metal load capacity in catalyst
Mass fraction is 0.3%, platinum: the ratio of palladium is 6: 1, and the deactivation temperature of catalyst is less than 900 DEG C in catalyst coatings 3.Catalysis applies
3 pairs of running temperature of layer have more rigors, need to control at 900 DEG C hereinafter, catalyst overtemperature is avoided to lose catalytic activity.Inactivation
Catalyst coatings 3 no longer have catalytic properties afterwards, will become common accumulation of heat filler, it will the defeated thermal energy power of whole system is reduced,
It is unable to satisfy heating demand demand.The aperture of water absorption layer 16, recuperation layer 4 and catalyst coatings 3 is gradually increased, recuperation layer 4 and catalysis
The overall structure of filler passage is preferably the honeycomb of cuboid, specification 150mm*150mm*300mm, i.e. filler in coating 3
The cross-sectional shape in channel is regular hexagon, when main cause is compared to same flow gas is handled, uses regular hexagon cross
The honeycomb filler in section has more superior heat exchange property, smaller flow resistance.
The top of heat accumulation incinerator 2 is the combustion chamber 1 for being equipped with burner 14, offers exhaust gases passes above combustion chamber 1
15, high-temperature flue gas regulating valve 17 is connected on exhaust gases passes 15.After gas after catalysis oxidation burns in combustion chamber 1, a part
Thermal energy enters the first heat storage or the second heat storage and preheats to from the gas for entering room entrance, and a part of thermal energy passes through cigarette
Gas channel 15 is recycled, and high-temperature flue gas regulating valve 17 can adjust the utilization rate of high-temperature flue gas.Blower 13 and chimney 6 it
Between be connected with the exhaust pipe for being equipped with manual gate valve 11 and pneumatic stopping valve 12, when pneumatic stopping valve 12 failure can not close
When closing or fitting badly close, hand-operated valve 11 can still play the effect of closing.
The packing method of fill in a kind of oxidation unit of the fill containing Combined porous medium, comprising the following steps:
A, the water absorption layer 16 that will be filled with water-absorbent material is laid on the first heat storage of top of inlet plenum 5 and the second heat storage
Bottom keeps uniformly and smooth, it is ensured that all cover the upper surface of inlet plenum 5 below the first heat storage and the second heat storage；
B, the recuperation layer 4 that will be filled with inertia accumulation of heat filler is laid on water absorption layer 16, keeps uniformly and smooth, it is ensured that complete
The upper surface of portion's covering water absorption layer 16；
C, the catalyst coatings 3 of catalyst evenly dispersed in accumulation of heat filler are laid on recuperation layer 4, keep uniformly peace
It is whole, it is ensured that all upper surfaces of covering recuperation layer 4, the top of recuperation layer 4 is the combustion chamber 1 for being equipped with burner.
When the oxidation unit work of the fill containing Combined porous medium, it is first turned on the first heat storage and the second accumulation of heat
The first intake valve 10, the second intake valve 8, the first air outlet valve 9 and the second air outlet valve 7 below body on admission line, coal mine gas
Enter the inlet plenum 5 below the first heat storage and the second heat storage by blower 13, admission line, the moisture quilt in coal mine gas
Water-absorbent material in first heat storage and the second heat storage water absorption layer 16 absorbs, and coal mine gas is by the inertia accumulation of heat in recuperation layer 4
After filler preheating, coal mine gas temperature is significantly risen, and into catalytic oxidation is carried out in catalyst coatings 3, coal mine gas is main
Ingredient is methane, and coal mine gas oxygenolysis in combustion chamber 1 is carbon dioxide and water, and releases a large amount of thermal energy, then
It successively flows into the recuperation layer 4 of the first heat storage and the second heat storage and carries out heat exchange with the cooling accumulation of heat filler of another part,
Chimney 6 is expelled to by outlet pipe after coal mine gas completion heat exchange.And the heat-storing material after heat exchange by coal mine gas again
Secondary heating completes the preheating of coal mine gas in subsequent cycle, reaches maximum energy-saving effect.Exhaust gases passes 15 can be opened simultaneously
On high-temperature flue gas regulating valve 17, by high-temperature flue gas export to needs equipment carry out heat recycling.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (10)
1. a kind of oxidation unit of fill containing Combined porous medium, including heat accumulation incinerator, blower and chimney, feature exist
In the heat accumulation incinerator middle part is fixedly installed with the accumulation of heat that heat accumulation incinerator is divided into the first heat storage and the second heat storage
Slot, the inlet plenum below first heat storage and the second heat storage passes through the admission line with intake valve respectively and blower connects
Logical, the inlet plenum below the first heat storage and the second heat storage is connected to by the outlet pipe with air outlet valve with chimney respectively, institute
It states and is followed successively by water absorption layer filled with water-absorbent material in the first heat storage and the second heat storage from top to bottom, filled with inertia accumulation of heat
The catalyst coatings of evenly dispersed catalyst, the hole of water absorption layer, recuperation layer and catalyst coatings in the recuperation layer and accumulation of heat filler of filler
Diameter is gradually increased, and the top of the heat accumulation incinerator is the combustion chamber for being equipped with burner, and it is logical that flue gas is offered above combustion chamber
Road.
2. the filling side of fill in a kind of oxidation unit of the fill containing Combined porous medium as described in claim 1
Method, which comprises the following steps:
A, the water absorption layer that will be filled with water-absorbent material is laid on the bottom of the first heat storage and the second heat storage above inlet plenum, protects
It holds uniform and smooth, it is ensured that all upper surfaces of the first heat storage of covering and the second heat storage lower section inlet plenum；
B, the recuperation layer that will be filled with inertia accumulation of heat filler is laid on water absorption layer, keeps uniformly and smooth, it is ensured that all coverings
The upper surface of water absorption layer；
C, the catalyst coatings of catalyst evenly dispersed in accumulation of heat filler are laid on recuperation layer, keep uniformly and smooth, it is ensured that
All upper surfaces of covering recuperation layer, the top of recuperation layer is the combustion chamber for being equipped with burner.
3. the oxidation unit of the fill containing Combined porous medium as described in claim 1, which is characterized in that the recuperation layer
Overall structure with filler passage in catalyst coatings is honeycomb, and the cross-sectional shape of filler passage is regular polygon or circle
It is a kind of in shape.
4. the oxidation unit of the fill containing Combined porous medium as described in claim 1, which is characterized in that the recuperation layer
Overall structure with filler passage in catalyst coatings is honeycomb, and the cross-sectional shape of filler passage is regular hexagon.
5. the oxidation unit of the fill containing Combined porous medium as described in claim 1, which is characterized in that the water absorption layer
Material be corpuscular gamma-alumina.
6. the oxidation unit of the fill containing Combined porous medium as described in claim 1, which is characterized in that the catalysis applies
The catalyst adulterated in layer is platinum palladium class catalyst, and the carrier of platinum palladium metal is the cordierite that mesh number is 100 mesh, platinum in catalyst
Palladium metal load capacity mass fraction is 0.3%, platinum: the ratio of palladium is 6: 1, and the deactivation temperature of catalyst is less than in catalyst coatings
900℃。
7. the oxidation unit of the fill containing Combined porous medium as described in claim 1, which is characterized in that the blower with
The exhaust pipe for being equipped with manual gate valve and pneumatic stopping valve is connected between chimney.
8. the oxidation unit of the fill containing Combined porous medium as described in claim 1, which is characterized in that described first stores
Hot body and the second heat storage are symmetrical arranged and structure is completely the same, the inlet plenum below first heat storage and the second heat storage
In back taper.
9. the oxidation unit of the fill containing Combined porous medium as described in claim 1, which is characterized in that the flue gas is logical
High-temperature flue gas regulating valve is connected on road.
10. the oxidation unit of the fill containing Combined porous medium as described in claim 1, which is characterized in that the accumulation of heat
The shell internal layer material of incinerator is steel alloy, and outer layer material is high-alumina.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810825918.8A CN109028110A (en) | 2018-07-25 | 2018-07-25 | A kind of oxidation unit and its packing method of the fill containing Combined porous medium |
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Application publication date: 20181218 |
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| RJ01 | Rejection of invention patent application after publication |