CN114935151A - Waste gas combustion furnace and waste gas treatment system - Google Patents
Waste gas combustion furnace and waste gas treatment system Download PDFInfo
- Publication number
- CN114935151A CN114935151A CN202210263980.9A CN202210263980A CN114935151A CN 114935151 A CN114935151 A CN 114935151A CN 202210263980 A CN202210263980 A CN 202210263980A CN 114935151 A CN114935151 A CN 114935151A
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- waste gas
- exhaust gas
- combustion
- gas
- furnace
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a waste gas combustion furnace, which relates to the technical field of waste gas emission and waste heat utilization and comprises a furnace body, wherein a waste gas inlet and a waste gas outlet are formed in the furnace body; the furnace body is also internally provided with a cracking device which can crack the waste gas introduced into the cracking device through the waste gas introduction port; the waste gas outlet is also provided with a combustion device which can burn the waste gas cracked by the cracking device; the furnace body is also connected with an air inlet for introducing air and/or oxygen. The invention also discloses an exhaust gas treatment system comprising the exhaust gas combustion furnace. The invention can solve the problem of ammonia gas residue in the waste gas in the prior art, and can effectively reduce the content of other combustible gases in the finally discharged waste gas.
Description
Technical Field
The invention relates to the technical field of waste gas emission and waste heat utilization of a controllable atmosphere heat treatment furnace, in particular to a waste gas combustion furnace and a waste gas treatment system.
Background
At present, the application of a controllable atmosphere heat treatment furnace is very common, and the application process is that a workpiece in the furnace is introduced into protective atmosphere under the heating condition so as to generate controllable chemical or diffusion reaction on the surface of the workpiece; the atmosphere composition typically comprises nitrogen, hydrogen, carbon monoxide, and the like, and ammonia may be used.
Among them, nitrogen is an inert gas, hydrogen and carbon monoxide are combustible gases, ammonia is also a combustible gas but is not well combustible in air, and meanwhile, ammonia has toxicity and strong pungent taste, while carbon monoxide is extremely toxic. In general, the protective atmosphere has the risk of suffocation, poisoning, and also of explosion. Therefore, the treatment of furnace off-gas with controlled atmosphere is a very important issue.
In practical application, the method of direct combustion or annular combustor is adopted to treat the waste gas of the hearth; however, when the exhaust gas contains residual ammonia gas, the above method has a drawback that the ammonia gas has a high ignition point and is not easily combusted in the air; through the treatment of the method, the ammonia gas in the finally discharged waste gas is easy to remain, does not meet the environmental protection requirement and can cause harm to human bodies.
Therefore, a new exhaust gas combustion furnace and an exhaust gas treatment system are provided to solve the above problems in the prior art.
Disclosure of Invention
The invention aims to provide a waste gas combustion furnace and a waste gas treatment system, which can solve the problem of ammonia gas residue in waste gas in the prior art and can effectively reduce the content of other combustible gases in the finally discharged waste gas.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a waste gas combustion furnace, which comprises a furnace body, wherein a waste gas inlet and a waste gas outlet are formed in the furnace body, and a heating device is arranged on the furnace body and can heat the furnace body; a cracking device is further arranged in the furnace body, and the cracking device can crack the waste gas introduced into the cracking device through the waste gas introduction port; the waste gas outlet is also provided with a combustion device which can combust combustible gas in the waste gas cracked by the cracking device; the furnace body is also connected with an air inlet which is used for introducing air and/or oxygen.
Preferably, the heating device comprises a gas burner, the gas burner is connected with a gas pipe, a gas electromagnetic valve is installed on the gas pipe, and the gas burner can ignite gas introduced into the gas pipe to heat the furnace body.
Preferably, a temperature sensor is further arranged in the furnace body, and the temperature sensor and the heating device are both connected with the controller.
Preferably, the cracking device comprises a cracking shell, a cracking catalyst is arranged in the cracking shell, and an air inlet and an air outlet are formed in the cracking shell.
Preferably, burner includes the burning fire cover, the air inlet of burning fire cover with waste gas draws forth the mouth intercommunication, still be provided with combustor and burning catalyst subassembly in the burning fire cover, burning catalyst subassembly is located the combustor is close to one side of the gas outlet of burning fire cover.
Preferably, the combustion burner cover is further provided with an ignition burner which is positioned between the burner and the combustion catalyst assembly.
Preferably, a waste gas leading-out pipeline is further arranged at the gas outlet of the combustion device, and a gas collecting hood is installed at one end, close to the gas outlet of the combustion device, of the waste gas leading-out pipeline.
Preferably, the waste gas introducing port is connected with a waste gas introducing pipeline, and a waste gas introducing electromagnetic valve is installed on the waste gas introducing pipeline; the air inlet is connected with an air inlet pipeline, and an air inlet electromagnetic valve is installed on the air inlet pipeline.
Preferably, a plurality of exhaust gas introduction pipes can be connected to the exhaust gas introduction port.
Preferably, the controller is further connected with a remote terminal.
The invention also provides a waste gas treatment system which comprises the waste gas combustion furnace, wherein a waste gas leading-out opening of the waste gas combustion furnace is connected with a waste gas leading-out pipeline, and the waste gas leading-out pipeline is also connected with waste heat utilization equipment.
Compared with the prior art, the invention has the following technical effects:
the furnace body is heated by the heating device to create a high-temperature environment, the cracking device is used for cracking the waste gas, and the ammonia in the waste gas is completely cracked into nitrogen and hydrogen under the action of the high temperature and the cracking device; air and/or oxygen is introduced through the air inlet, so that combustible gas in the waste gas can be combusted, and the working temperature of the furnace body is kept; the combustible waste gas after complete cracking can be fully combusted through the combustion device, and the content of combustible gas in the waste gas is reduced.
In conclusion, the invention solves the problem of residual ammonia in the waste gas in the prior art, and can also effectively reduce the content of other combustible gases in the finally discharged waste gas.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an exhaust gas burner according to an embodiment of the present invention;
description of reference numerals: 1. the device comprises a shell, 2 a furnace lining, 3 a cracking device, 4 a waste gas leading-in pipeline, 5 a gas burner, 6 a temperature sensor, 7 an annular burner, 8 a combustion catalyst component, 9 an ignition burner, 10 a combustion hood, 11 and a waste gas leading-out pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
The invention aims to provide a waste gas combustion furnace and a waste gas treatment system, which can solve the problem of ammonia gas residue in waste gas in the prior art and can effectively reduce the content of other combustible gases in the finally discharged waste gas.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
As shown in fig. 1, the present embodiment provides an exhaust gas combustion furnace, which includes a furnace body, wherein the furnace body is provided with an exhaust gas inlet and an exhaust gas outlet, and the exhaust gas inlet and the exhaust gas outlet are preferably arranged at the bottom and the top of the furnace body; the furnace body is also provided with a heating device which can heat the furnace body; the furnace body is also provided with a cracking device 3, the cracking device 3 can crack the waste gas introduced into the cracking device 3 from a waste gas introduction port, and the waste gas introduction port and the waste gas extraction port are preferably respectively positioned below and above the cracking device 3; the waste gas outlet is also provided with a combustion device which can burn combustible gas in the waste gas cracked by the cracking device 3; the furnace body is also connected with an air inlet which is used for introducing air and/or oxygen so as to facilitate the combustion of waste gas; the heating device and the combustion device may also be connected to a controller.
In this embodiment, the furnace body may be an existing combustion furnace, and mainly includes a housing 1, a chamber is provided in the housing 1, and a furnace lining 2 is provided on an inner wall of the housing 1; alternatively, the furnace body with other structures can be selected according to specific working requirements.
In this embodiment, the heating device preferably comprises a gas burner 5, and the gas burner 5 extends into a chamber in the furnace body and is positioned below the cracking device 3; the gas burner 5 is connected with a gas pipe, gas is introduced through the gas pipe, and the gas burner 5 can ignite the gas introduced through the gas pipe to heat the furnace body, so that a high-temperature environment is created; wherein, still install the gas solenoid valve on the gas pipe to the switching on and the disconnection of control gas, gas solenoid valve and gas nozzle 5 all are connected with the controller. Or other heating devices can be selected, such as an electric heating wire or an electric heating rod, the electric heating wire can be wound on the inner wall of the furnace body to heat the furnace body, and the electric heating rod can extend into the chamber of the furnace body to heat.
In this embodiment, a temperature sensor 6 is further disposed in the furnace body, and is used for monitoring the temperature in the furnace body in real time, and the temperature sensor 6 is connected with the controller; the temperature sensor 6 may be a thermal resistor or a thermocouple, and a thermocouple is preferably used in this embodiment.
In this embodiment, the cracking device 3 includes a cracking casing, a cracking catalyst is disposed in the cracking casing, and an air inlet and an air outlet are disposed on the cracking casing; the waste gas enters through the air inlet of the cracking shell, then fully contacts with the cracking catalyst to carry out high-temperature cracking, and is discharged from the air outlet of the cracking shell after the cracking is finished. In the present embodiment, it is preferable to treat the exhaust gas discharged from the controlled atmosphere heat treatment furnace, especially to treat the exhaust gas containing ammonia gas discharged from the controlled atmosphere heat treatment furnace; therefore, the cracking catalyst is selected for ammonia cracking treatment, ammonia is completely cracked into nitrogen and hydrogen under the action of high temperature and the cracking catalyst, and the cracking catalyst preferably adopts a heat-resistant steel wire mesh, or other cracking catalysts can be selected according to requirements.
Alternatively, other cracking catalysts may be selected to crack different gases.
In this embodiment, the combustion apparatus includes a combustion hood 10, an air inlet of the combustion hood 10 is communicated with the exhaust gas outlet, a burner and a combustion catalyst assembly 8 are further disposed in the combustion hood 10, the combustion catalyst assembly 8 is located on one side of the burner close to the air outlet of the combustion hood 10, and the burner is connected with the controller; various combustible gases in the waste gas after being completely cracked by the cracking device 3 are fully combusted in the combustion fire cover 10 through the combustor and the combustion catalyst component 8, so that the content of the combustible gases in the finally discharged waste gas is reduced.
Specifically, the combustion hood 10 is preferably a vertically arranged cylindrical structure, and the burner corresponds to the annular burner 7; alternatively, other configurations of the burner cap 10 and burner may be selected depending on the particular operational needs. The combustion catalyst component 8 preferably comprises a support component, the support component is positioned above the annular combustor 7, and the support component is provided with a combustion catalyst; wherein, the preferred bracing piece or support frame etc. that adopts of supporting component, the preferred heat-resisting steel wire net that adopts of combustion catalyst, perhaps selects other combustion catalysts as required.
In this embodiment, an ignition burner 9 is further mounted on the combustion burner cover 10, the ignition burner 9 is located between the burner and the combustion catalyst assembly 8, and the ignition burner 9 is connected with the controller; the ignition burner 9 can be provided with a detection electrode, whether flame exists or not is detected through ionization, and when no flame is detected, active ignition is performed.
In this embodiment, a waste gas outlet pipe 11 is further disposed at the gas outlet of the combustion apparatus, and a gas collecting hood is installed at one end of the waste gas outlet pipe 11 close to the gas outlet of the combustion apparatus; the gas collecting hood preferably adopts a conical gas collecting hood, so that waste gas can be better collected.
In the present embodiment, the exhaust gas introduction port is connected to an exhaust gas introduction pipe 4, and an exhaust gas introduction solenoid valve is installed on the exhaust gas introduction pipe 4; the air inlet is connected with an air inlet pipeline, and an air inlet electromagnetic valve is installed on the air inlet pipeline. Further, the waste gas introducing port can be connected with a plurality of waste gas introducing pipelines 4, so that combustible waste gas of equipment in a plurality of production lines can be introduced, and centralized treatment is facilitated.
In this embodiment, the controller is further connected to a remote terminal, and the remote terminal preferably adopts a computer or a mobile phone, and can realize computer remote monitoring or mobile phone monitoring, so as to facilitate the operation condition of the real-time exhaust gas combustion furnace.
In this embodiment, the controller can also be connected with the alarm, when the temperature of furnace body, pressure are too high or have some other potential safety hazards, can automatic alarm to shut down or handle the potential safety hazard, guarantee the installation nature.
The embodiment also discloses a waste gas treatment system, which comprises the waste gas combustion furnace, wherein a waste gas leading-out opening of the waste gas combustion furnace is connected with a waste gas leading-out pipeline 11, and one end of the waste gas leading-out pipeline 11, which is far away from the waste gas leading-out opening, is also connected with waste heat utilization equipment; the waste heat utilization equipment can preferably adopt drying equipment or a heat exchanger and the like, so that the waste heat utilization of high-temperature waste gas is realized, and the energy is saved and the consumption is reduced.
The operation of the exhaust gas treatment system in this embodiment is as follows:
preparing for work, igniting a gas burner 5, heating a furnace body, keeping the temperature when the temperature of the furnace is raised to 830 ℃, controlling the gas burner 5 through a controller, keeping the temperature constant between 820 and 840 ℃, and measuring the temperature of the furnace body through a temperature sensor 6; this is the furnace standby state.
Introducing waste gas containing combustible gas (including ammonia), and completely cracking the ammonia into nitrogen and hydrogen under the action of high temperature and cracking catalyst; closing the gas electromagnetic valve, stopping the gas burner 5, controlling the gas inlet electromagnetic valve to be opened, introducing air and/or oxygen into the furnace, combusting with combustible gas in the waste gas, and keeping the working temperature;
the combustible waste gas after complete cracking is fully combusted in a combustion burner cap 10 through an annular combustor 7 and a combustion catalyst, and the ignition burner 9 automatically detects no flame and actively ignites; finally, the waste gas is discharged through a waste gas outlet pipeline 11, and the high-temperature waste gas can be introduced into waste heat utilization equipment for waste heat utilization.
In conclusion, common combustible gases including ammonia can be completely cracked and combusted after passing through the waste gas combustion furnace, so that the environment-friendly characteristic of finally discharging waste gas is ensured; moreover, the waste gas combustion furnace can realize the centralized discharge and utilization of waste gas. Furthermore, the waste gas burner automatically controls the operation, is safe in interlocking, reliable in performance, low in equipment operation cost, improves the working environment, improves the environmental protection quality, and has a wide application range.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the foregoing, the description is not to be taken in a limiting sense.
Claims (10)
1. A waste gas combustion furnace comprises a furnace body, wherein a waste gas inlet and a waste gas outlet are formed in the furnace body, and the waste gas combustion furnace is characterized in that a heating device is arranged on the furnace body and can heat the furnace body; a cracking device is further arranged in the furnace body, and the cracking device can crack the waste gas introduced into the cracking device through the waste gas introduction port; the waste gas outlet is also provided with a combustion device which can combust combustible gas in the waste gas cracked by the cracking device; the furnace body is also connected with an air inlet, and the air inlet is used for introducing air and/or oxygen.
2. The exhaust gas combustion furnace as set forth in claim 1, wherein the heating device includes a gas burner connected to a gas pipe, the gas pipe having a gas solenoid valve mounted thereon, the gas burner being capable of igniting gas introduced from the gas pipe to heat the furnace body.
3. The exhaust gas combustion furnace as set forth in claim 1, wherein a temperature sensor is further provided in the furnace body, and the temperature sensor and the heating device are connected to a controller.
4. The exhaust gas combustion furnace as recited in claim 1, wherein the cracking device includes a cracking housing, a cracking catalyst is disposed in the cracking housing, and an air inlet and an air outlet are disposed in the cracking housing.
5. The exhaust gas combustion furnace as set forth in claim 1, wherein the combustion device includes a combustion hood, an air inlet of the combustion hood is communicated with the exhaust gas outlet, a burner and a combustion catalyst assembly are further disposed in the combustion hood, and the combustion catalyst assembly is disposed on a side of the burner adjacent to an air outlet of the combustion hood.
6. The exhaust gas combustion furnace as set forth in claim 5 wherein an ignition burner is further mounted on said combustion hood, said ignition burner being located between said burner and said combustion catalyst assembly.
7. The exhaust gas combustion furnace as set forth in claim 1, wherein an exhaust gas introduction pipe is connected to the exhaust gas introduction port, and an exhaust gas introduction solenoid valve is installed on the exhaust gas introduction pipe; the air inlet is connected with an air inlet pipeline, and an air inlet electromagnetic valve is installed on the air inlet pipeline.
8. The exhaust gas combustion furnace as set forth in claim 1 or 7, wherein a plurality of exhaust gas introduction pipes are connectable to the exhaust gas introduction port.
9. The exhaust gas combustion furnace as set forth in claim 3 wherein said controller is further connected to a remote terminal.
10. An exhaust gas treatment system comprising the exhaust gas combustion furnace as set forth in any one of claims 1 to 9, wherein an exhaust gas outlet of the exhaust gas combustion furnace is connected to an exhaust gas outlet duct, and the exhaust gas outlet duct is further connected to a waste heat utilization device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210263980.9A CN114935151A (en) | 2022-03-17 | 2022-03-17 | Waste gas combustion furnace and waste gas treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210263980.9A CN114935151A (en) | 2022-03-17 | 2022-03-17 | Waste gas combustion furnace and waste gas treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN114935151A true CN114935151A (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210263980.9A Withdrawn CN114935151A (en) | 2022-03-17 | 2022-03-17 | Waste gas combustion furnace and waste gas treatment system |
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| CN (1) | CN114935151A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116293741A (en) * | 2023-03-10 | 2023-06-23 | 唐山市蓝欣玻璃有限公司 | High-temperature treatment process for combustible flue gas |
-
2022
- 2022-03-17 CN CN202210263980.9A patent/CN114935151A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116293741A (en) * | 2023-03-10 | 2023-06-23 | 唐山市蓝欣玻璃有限公司 | High-temperature treatment process for combustible flue gas |
| CN116293741B (en) * | 2023-03-10 | 2024-01-16 | 唐山市蓝欣玻璃有限公司 | High-temperature treatment process for combustible flue gas |
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Application publication date: 20220823 |
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