CN111298644A - DPF high-temperature regeneration furnace and DPF high-temperature regeneration furnace exhaust purification method - Google Patents
DPF high-temperature regeneration furnace and DPF high-temperature regeneration furnace exhaust purification method Download PDFInfo
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- CN111298644A CN111298644A CN202010165999.0A CN202010165999A CN111298644A CN 111298644 A CN111298644 A CN 111298644A CN 202010165999 A CN202010165999 A CN 202010165999A CN 111298644 A CN111298644 A CN 111298644A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/864—Removing carbon monoxide or hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0237—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles for regenerating ex situ
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
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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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Abstract
The application relates to a DPF high-temperature regeneration furnace and a DPF high-temperature regeneration furnace exhaust purification method, and belongs to the technical field of DPF high-temperature regeneration furnace exhaust treatment. DPF high temperature regeneration stove is provided with the gas vent on DPF high temperature regeneration stove's the furnace, installs exhaust gas purifier on the gas vent, and exhaust gas purifier's export is as DPF high temperature regeneration stove's mouth of breathing, and exhaust gas purifier is used for the harmful gas catalytic oxidation who will not totally oxidize to harmless gas. According to DPF high temperature regeneration stove of this application embodiment, add through the gas vent at DPF high temperature regeneration stove's furnace and establish exhaust gas purifier for catalytic oxidation carries out when the waste gas that DPF regeneration produced in the furnace (also be tail gas) is discharged, converts harmful gas into harmless gas, thereby reduces the pollution to the environment.
Description
Technical Field
The application relates to the technical field of DPF high-temperature regeneration furnace tail gas treatment, in particular to a DPF high-temperature regeneration furnace and a DPF high-temperature regeneration furnace exhaust purification method.
Background
Once a DPF on a vehicle becomes clogged, it must be removed from the vehicle (off-line) for disposal — off-line regeneration. High temperature incineration is a common technical method for off-line regeneration. Substances filtered by the DPF comprise carbon particles, soluble Organic matters (including incompletely combusted diesel oil and engine oil, and SOF (soluble Organic fraction)) in the form of particles, and the like, wherein the carbon particles and part of the SOF are subjected to oxidation reaction at high temperature to be eliminated, and the oxidation reaction formula is as follows:
C+O2→CO2+CO；
SOF+O2→CO2+H2O+CO+HC。
CO and HC which are not fully oxidized and SOF which is partially evaporated can cause certain pollution to the atmospheric environment if the CO and HC are directly discharged into the atmosphere without purification treatment, so that secondary pollution is caused to the environment while the DPF is regenerated.
Disclosure of Invention
The application aims to provide a PDF high-temperature regeneration furnace, which can be used for catalytically oxidizing harmful gases which are not completely oxidized in tail gas of the high-temperature regeneration furnace into harmless gases, so that the pollution to the environment is reduced.
Another object of the present application is to provide a DPF high temperature regeneration furnace exhaust gas purification method, which can effectively purify exhaust gas discharged from the DPF high temperature regeneration furnace, and reduce environmental pollution.
According to the DPF high temperature regeneration stove of the embodiment of this application first aspect, be provided with the gas vent on DPF high temperature regeneration stove's the furnace, install exhaust gas purifier on the gas vent, exhaust gas purifier's export is as DPF high temperature regeneration stove's mouth of breathing, exhaust gas purifier is used for catalytic oxidation of the harmful gas that does not oxidize completely to harmless gas.
According to DPF high temperature regeneration stove of this application embodiment, add through the gas vent at DPF high temperature regeneration stove's furnace and establish exhaust gas purifier for catalytic oxidation carries out when the waste gas that DPF regeneration produced in the furnace (also be tail gas) is discharged, converts harmful gas into harmless gas, thereby reduces the pollution to the environment.
In addition, the DPF high-temperature regeneration furnace according to the embodiment of the application also has the following additional technical characteristics:
according to some embodiments of the present application, the exhaust gas purifier is welded or detachably connected with a furnace of the DPF high temperature regeneration furnace.
In the above embodiment, when the exhaust gas purifier is welded to the furnace, the exhaust gas purifier is firmly connected to the furnace; when exhaust gas purifier is connected with furnace detachably, exhaust gas purifier can be dismantled with furnace, is convenient for change and maintain.
According to some embodiments of the present application, an exhaust gas purifier includes a housing and a precious metal catalytic device mounted inside the housing.
In the above embodiments, the noble metal catalytic device is mounted within the housing, facilitating protection of the noble metal catalytic device for reaction of exhaust gases with the noble metal catalytic device within the housing.
In some embodiments of the present application, the exhaust gas purifier further includes a gasket interposed between the precious metal catalytic device and the housing.
In the above embodiment, the gasket ensures the connection sealing property between the noble metal catalyst device and the housing, and prevents the noble metal catalyst device from moving relative to the housing.
In some embodiments of the present application, the noble metal catalytic device includes a carrier having a honeycomb structure and a catalyst coating layer applied to wall surfaces of honeycomb-shaped passages of the carrier.
In the above embodiment, the carrier has a honeycomb structure, which facilitates the sufficient oxidation reaction of the exhaust gas in the honeycomb channels, and improves the purification efficiency of the exhaust gas.
In some embodiments of the present disclosure, the carrier is ceramic, and the material of the catalyst coating layer is at least one of platinum, palladium and rhodium.
In the above embodiment, the carrier is made of ceramic, which can resist high temperature; the catalyst coating adopts at least one of platinum, palladium and rhodium, has high catalytic activity and also has comprehensive excellent characteristics of high temperature resistance, oxidation resistance, corrosion resistance and the like.
In some embodiments of the present application, a noble metal catalytic device includes a support in a roll-sheet or wire shape and a catalyst coating applied to a surface of the support.
In the above embodiment, the carrier is in the form of a rolled sheet or a thread, which facilitates contact with harmful substances in the exhaust gas and increases the contact area.
In some embodiments of the present disclosure, the material of the carrier is metal, and the material of the catalyst coating layer is at least one of platinum, palladium and rhodium.
In the above embodiment, the carrier is made of metal, and can resist high temperature; the catalyst coating adopts at least one of platinum, palladium and rhodium, has high catalytic activity and also has comprehensive excellent characteristics of high temperature resistance, oxidation resistance, corrosion resistance and the like.
In some embodiments of the present application, the housing includes a cylinder and two end caps, the noble metal catalytic device is disposed in the cylinder, the two end caps are respectively disposed at two ends of the cylinder, and each end cap is welded or detachably connected with the cylinder.
In the above embodiment, the housing is assembled by the cylinder and the two end caps, so that the noble metal catalytic device can be conveniently placed in the cylinder.
According to the DPF high-temperature regeneration furnace exhaust purification method of the embodiment of the second aspect of the application, the method comprises the following steps:
a preparation stage: an exhaust gas purifier is arranged above an exhaust port of a hearth of the DPF high-temperature regeneration furnace, the exhaust gas purifier is communicated with the hearth, and an outlet of the exhaust gas purifier is used as a breathing port of the DPF high-temperature regeneration furnace;
a purification stage: the exhaust gas that DPF high temperature regeneration stove produced DPF regeneration is discharged after handling through exhaust gas purifier, through exhaust gas purifier with the harmful gas catalytic oxidation who does not oxidize completely in the waste gas into harmless gas.
According to the exhaust purification method of the DPF high-temperature regeneration furnace, exhaust gas discharged by the DPF high-temperature regeneration furnace can be effectively purified, harmful gas which is not completely oxidized is catalytically oxidized into harmless gas to be discharged, and pollution to the environment is reduced.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural diagram of a DPF high-temperature regeneration furnace provided in an embodiment of the present application;
FIG. 2 is a sectional view of an exhaust gas purifier of a DPF high-temperature regeneration furnace according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a carrier and a catalyst coating of an exhaust gas purifier of a DPF high-temperature regeneration furnace according to an embodiment of the present disclosure;
FIG. 4 is a schematic view (welded type) of a first structure of a housing of an exhaust gas purifier of a DPF high-temperature regeneration furnace according to an embodiment of the present application;
FIG. 5 is a second schematic structural diagram (flange type) of a housing of an exhaust gas purifier of a DPF high-temperature regeneration furnace according to an embodiment of the present application;
FIG. 6 is a third schematic structural diagram (spinning type) of an outer casing of an exhaust gas purifier of a DPF high-temperature regeneration furnace according to an embodiment of the present application;
fig. 7 is a schematic assembly diagram (welded type) of an exhaust gas purifier and a furnace chamber of a DPF high-temperature regeneration furnace according to an embodiment of the present application;
fig. 8 is a schematic assembly diagram (plug-in type) of an exhaust gas purifier and a furnace chamber of a DPF high-temperature regeneration furnace according to an embodiment of the present application;
fig. 9 is a schematic view (flange type) of an assembly of an exhaust gas purifier and a furnace chamber of a DPF high-temperature regeneration furnace according to an embodiment of the present application.
Icon: 100-DPF high-temperature regeneration furnace; 11-a furnace body; 12-a hearth; 13-DPF; 14-oven door; 15-short pipe; 20-exhaust gas purifier; 21-a housing; 211-cylinder; 212-end cap; 213-first flange; 214-a second flange; 22-noble metal catalytic devices; 221-a vector; 222-a catalyst coating; 23-a liner; 24-a connecting tube; 25-flange plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The DPF high temperature regeneration stove that this application introduced is DPF high temperature off-line regenerator for carry out off-line regeneration to the DPF that pulls down from the vehicle.
A DPF high-temperature regeneration furnace 100 according to an embodiment of the first aspect of the present application is described below with reference to the drawings.
As shown in fig. 1, according to the DPF high temperature regeneration furnace 100 of the embodiment of the present application, a furnace 12 is opened on a furnace body 11, a furnace door 14 is connected to the furnace body 11, the furnace door 14 seals an opening of the furnace 12, when the DPF13 is regenerated, the DPF13 is placed in the furnace 12, the furnace door 14 is closed, and the DPF13 is regenerated by high temperature. An exhaust port (not shown in the figure) is arranged on the hearth 12 of the DPF high-temperature regeneration furnace 100, an exhaust gas purifier 20 is installed on the exhaust port, an outlet of the exhaust gas purifier 20 is used as a breathing port of the DPF high-temperature regeneration furnace 100, exhaust gas (or tail gas) generated after the DPF13 regenerates in the hearth 12 is purified by the exhaust gas purifier 20 and then is discharged into the atmosphere, and the exhaust gas purifier 20 is used for catalytically oxidizing harmful gas which is not completely oxidized into harmless gas.
It should be noted that the internal structure of the DPF high-temperature regeneration furnace 100 is the prior art, and the exhaust gas purifier 20 is mainly disposed at the exhaust port of the furnace 12 of the DPF high-temperature regeneration furnace 100, so the exhaust gas purifier 20 and the assembly of the exhaust gas purifier 20 and the furnace 12 are mainly described.
According to the DPF high-temperature regeneration furnace 100 of the embodiment of the application, the exhaust gas purifier 20 is additionally arranged at the exhaust port of the hearth 12 of the DPF high-temperature regeneration furnace 100, so that the exhaust gas generated by the regeneration of the DPF13 in the hearth 12 is subjected to catalytic oxidation when being discharged, harmful gas is converted into harmless gas, and the pollution to the environment is reduced.
The structural features and the connection manner of the respective components of the DPF high-temperature regeneration furnace 100 according to the embodiment of the present application are described below with reference to the accompanying drawings.
As shown in fig. 1, the exhaust gas purifier 20 is attached to an exhaust port of the furnace 12 of the DPF high-temperature regeneration furnace 100, and an outlet of the exhaust gas purifier 20 serves as a breathing port of the DPF high-temperature regeneration furnace 100.
As shown in fig. 2, the exhaust gas purifier 20 includes a casing 21, a noble metal catalytic device 22, and a mat 23, the casing 21 being open at both ends and being open at both ends in communication; the noble metal catalyst device 22 is disposed in the housing 21, and the packing 23 is interposed between the noble metal catalyst device 22 and the housing 21 to position the noble metal catalyst device 22, ensure the sealing property of the noble metal catalyst device 22 to the housing 21, and prevent the noble metal catalyst device 22 from moving relative to the housing 21.
According to some embodiments of the present application, as shown in fig. 3, the precious metal catalytic device 22 includes a carrier 221 and a catalyst coating layer 222, the carrier 221 is a honeycomb structure, the honeycomb structure is formed with honeycomb channels, and the honeycomb channels communicate with openings at both ends of the outer shell 21; the catalyst coating 222 is coated on the wall surface of the honeycomb passage of the carrier 221, and when the exhaust gas flows through the honeycomb passage, the exhaust gas has a large contact area with the catalyst coating 222, so that the harmful gas can be effectively catalytically oxidized, and the purification efficiency of the exhaust gas purifier 20 is improved.
Further, when the carrier 221 has a honeycomb structure, the material of the carrier 221 is ceramic, such as cordierite, silicon carbide, etc., which has better high temperature resistance and large specific surface area. The material of the catalyst coating 222 is at least one (one, two, or three) of platinum, palladium, and rhodium, and the precious metals such as platinum, palladium, and rhodium have high catalytic activity, and also have comprehensive excellent characteristics such as high temperature resistance, oxidation resistance, corrosion resistance, and the like.
According to some embodiments of the present application, the precious metal catalytic device 22 includes a carrier (not shown) and a catalyst coating (not shown), the carrier being in a roll-sheet or wire shape such that the carrier has a large contact area with the exhaust gas; the catalyst coating is coated on the surface of the roll-shaped carrier or the surface of the filiform carrier, and when waste gas flows through the roll-shaped carrier or the filiform carrier, the waste gas can be effectively catalyzed and oxidized, so that the purification of harmful gas is realized.
Furthermore, when the carrier is in a coiled sheet shape or a thread shape, the material of the carrier is metal, such as Fe-Cr-Al alloy, Ti-Fe-Al alloy and the like, and the carrier is high temperature resistant, has small specific heat capacity and is beneficial to the ignition of the catalyst. The material of the catalyst coating is at least one (one, two or three) of platinum, palladium and rhodium, and the precious metals such as platinum, palladium and rhodium have high catalytic activity and comprehensive excellent characteristics such as high temperature resistance, oxidation resistance and corrosion resistance.
According to some embodiments of the present application, the housing 21 includes a cylinder 211 and two end covers 212, the precious metal catalytic device 22 is disposed in the cylinder 211, the two end covers 212 are respectively disposed at two ends of the cylinder 211, each end cover 212 is provided with a through hole communicated with the cylinder 211, and each end cover 212 is connected with the cylinder 211.
In some embodiments of the present application, as shown in FIG. 4, each end cap 212 is welded to the cylinder 211. During assembly, the precious metal catalyst 22 is first pressed into the cylinder 211 together with the gasket 23, and then the end caps 212 are welded to both ends of the cylinder 211. The end cover 212 and the cylinder body 211 are welded, so that the connection strength of the end cover 212 and the cylinder body 211 is guaranteed, and the end cover 212 and the cylinder body 211 are well sealed.
In some embodiments of the present application, each end cap 212 is removably coupled, such as by a flange, to barrel 211. As shown in fig. 5, when the end cap 212 is connected to the cylinder 211 in a flange manner, a first flange 213 is formed at the end of the cylinder 211, a second flange 214 corresponding to the first flange 213 is formed at the edge of the end cap 212, and the end cap 212 and the cylinder 211 are locked by a threaded locking member inserted into the second flange 214 and the first flange 213.
In some embodiments of the present application, each end cap 212 may also be integral with the barrel 211, such as a spin-on housing. As shown in fig. 6, when the end cap 212 and the cylinder 211 are formed by a spinning process, the cylinder 211 is partially formed, the precious metal catalyst 22 is pressed into the cylinder 211 together with the packing 23, and the end cap 212 (both ends of the housing 21) is formed by the material of the cylinder 211 itself by the spinning process at both ends of the cylinder 211. Once the end caps 212 at both ends of the cylinder 211 are formed by spinning, the housing 21 becomes integral, the housing 21 is not broken, and the noble metal catalyst device 22 cannot be removed from the housing 21.
In some embodiments of the present application, as shown in fig. 7, the inlet end of the exhaust gas purifier 20 is connected with a connecting pipe 24, and the connecting pipe 24 is welded with the exhaust port above the furnace 12 of the DPF high-temperature regeneration furnace 100; the exhaust gas purifier 20 is welded to the furnace 12 of the DPF high temperature regeneration furnace 100, so that the installation stability of the exhaust gas purifier 20 is ensured.
In some embodiments of the present application, as shown in fig. 8, a short pipe 15 is connected to the exhaust port above the furnace 12 of the DPF high-temperature regeneration furnace 100, a connecting pipe 24 is connected to the inlet end of the exhaust gas purifier 20, and the connecting pipe 24 is inserted into the short pipe 15, and the two are in interference fit or transition fit. The exhaust gas purifier 20 is connected with the furnace 12 of the DPF high-temperature regeneration furnace 100 in an insertion manner, so that the exhaust gas purifier 20 can be assembled and disassembled conveniently.
In some embodiments of the present application, as shown in fig. 9, threaded holes (not shown) are opened around the exhaust port above the furnace 12 of the DPF high-temperature regeneration furnace 100, the inlet end of the exhaust gas purifier 20 is connected with a connection pipe 24, a flange 25 is welded to the end of the connection pipe 24, the flange 25 corresponds to the threaded holes around the exhaust port of the furnace 12, and the flange 25 is connected to the furnace 12 by screws. The exhaust gas purifier 20 is connected with the furnace 12 of the DPF high-temperature regeneration furnace 100 in a flange manner, so that the exhaust gas purifier 20 can be assembled and disassembled conveniently.
The working principle of the DPF high-temperature regeneration furnace 100 according to the embodiment of the present application is:
as shown in fig. 1, the exhaust gas purifier 20 is installed above the furnace 12 of the DPF high-temperature regeneration furnace 100 at the installation position of the DPF high-temperature regeneration furnace 100, and the outlet of the exhaust gas purifier 20 is used as a breathing port of the DPF high-temperature regeneration furnace 100. The precious metal catalyst device 22 is heated by the exhaust heat of the furnace 12 to the temperature at which the catalyst coating 222 is effective, and when the exhaust gas passes through the catalyst coating 222, CO, HC and SOF which are not completely oxidized are catalytically oxidized into harmless substances, and the reaction formula is as follows:
CO+O2→CO2；
HC+O2→CO2+H2O；
SOF+O2→CO2+H2O。
according to the DPF high-temperature regeneration furnace 100 of the embodiment of the application, exhaust gas can be purified and then discharged, and pollution to the environment is reduced.
According to a second aspect of the application, the embodiment provides a DPF high-temperature regeneration furnace exhaust purification method.
The method comprises the following steps:
a preparation stage: an exhaust gas purifier 20 is arranged above an exhaust port of a hearth 12 of the DPF high-temperature regeneration furnace 100, the exhaust gas purifier 20 is communicated with the hearth 12, and an outlet of the exhaust gas purifier 20 is used as a breathing port of the DPF high-temperature regeneration furnace 100;
a purification stage: the exhaust gas generated by the DPF13 regeneration by the DPF high-temperature regeneration furnace 100 is treated by the exhaust gas purifier 20 and then discharged, and the harmful gas that is not completely oxidized in the exhaust gas is catalytically oxidized into harmless gas by the exhaust gas purifier 20.
According to the exhaust purification method of the DPF high-temperature regeneration furnace, exhaust gas discharged by the DPF high-temperature regeneration furnace 100 can be effectively purified, harmful gas which is not completely oxidized is catalytically oxidized into harmless gas to be discharged, and pollution to the environment is reduced.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a DPF high temperature regeneration stove, its characterized in that, be provided with the gas vent on DPF high temperature regeneration stove's the furnace, install exhaust gas purifier on the gas vent, exhaust gas purifier's export is as DPF high temperature regeneration stove's mouth of breathing, exhaust gas purifier is used for catalytic oxidation of the harmful gas that does not oxidize completely to harmless gas.
2. The DPF high-temperature regeneration furnace of claim 1, wherein the exhaust gas purifier is welded or detachably connected with a hearth of the DPF high-temperature regeneration furnace.
3. The DPF high-temperature regeneration furnace of claim 1, wherein the exhaust gas purifier includes a housing and a precious metal catalytic device installed inside the housing.
4. The DPF high-temperature regeneration furnace of claim 3, wherein the exhaust gas purifier further comprises a gasket interposed between the precious metal catalytic device and the housing.
5. The DPF high-temperature regeneration furnace of claim 3, wherein the precious metal catalytic device includes a carrier having a honeycomb structure and a catalyst coating applied to wall surfaces of honeycomb channels of the carrier.
6. The DPF high-temperature regeneration furnace of claim 5, wherein the carrier is ceramic, and the material of the catalyst coating layer is at least one of platinum, palladium and rhodium.
7. The DPF high-temperature regeneration furnace of claim 3, wherein the precious metal catalytic device includes a carrier in a roll or wire shape and a catalyst coating applied to a surface of the carrier.
8. The DPF high-temperature regeneration furnace according to claim 7, wherein the material of the carrier is metal, and the material of the catalyst coating layer is at least one of platinum, palladium and rhodium.
9. The DPF high-temperature regeneration furnace of claim 3, wherein the housing includes a cylinder and two end caps, the precious metal catalytic device is disposed in the cylinder, the two end caps are respectively located at two ends of the cylinder, and each end cap is welded or detachably connected with the cylinder.
10. A DPF high temperature regeneration furnace exhaust gas purification method, comprising:
a preparation stage: an exhaust gas purifier is arranged above an exhaust port of a hearth of the DPF high-temperature regeneration furnace, the exhaust gas purifier is communicated with the hearth, and an outlet of the exhaust gas purifier is used as a breathing port of the DPF high-temperature regeneration furnace;
a purification stage: the exhaust gas that DPF high temperature regeneration stove produced DPF regeneration is discharged after handling through exhaust gas purifier, through exhaust gas purifier with the harmful gas catalytic oxidation who does not oxidize completely in the waste gas into harmless gas.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432502A (en) * | 2020-11-10 | 2021-03-02 | 杨昌忠 | DPF regeneration furnace and circulating system |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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