CN110763037A - Tail gas treatment method and device for vanadium-based alloy rotary kiln production line and application of tail gas treatment method and device - Google Patents
Tail gas treatment method and device for vanadium-based alloy rotary kiln production line and application of tail gas treatment method and device Download PDFInfo
- Publication number
- CN110763037A CN110763037A CN201911073616.0A CN201911073616A CN110763037A CN 110763037 A CN110763037 A CN 110763037A CN 201911073616 A CN201911073616 A CN 201911073616A CN 110763037 A CN110763037 A CN 110763037A
- Authority
- CN
- China
- Prior art keywords
- tail gas
- treatment
- temperature
- combustion
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
-
- 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
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/10—Supplementary heating arrangements using auxiliary fuel
- F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
Abstract
The invention provides a tail gas treatment method of a vanadium-based alloy rotary kiln production line, a tail gas treatment device and application thereof, relating to the technical field of tail gas treatment, wherein the tail gas treatment method of the vanadium-based alloy rotary kiln production line comprises the following steps: and sequentially carrying out temperature regulation, dust removal and combustion treatment on the tail gas, wherein the temperature regulation comprises the step of controlling the temperature of the tail gas to be 120-480 ℃. The tail gas treated by the method can meet the requirement of environmental protection, and is beneficial to reducing system construction investment and material loss, thereby being beneficial to reducing cost.
Description
Technical Field
The invention relates to the technical field of tail gas treatment, in particular to a tail gas treatment method and a tail gas treatment device for a vanadium-based alloy rotary kiln production line and application thereof.
Background
The production of vanadium-based alloy is carried out by adopting a rotary kiln device, and the raw material mainly adopts V2O5And reducing agent containing C and other ingredients, the raw materials are processed, mixed and pressed into balls, the resistivity of the balls is different under different temperature conditions, and according to the characteristics, the kiln body structure and the operation parameters meeting the change process of the materials in various physical and chemical reactions are designed by utilizing the motion rule of the materials in the rotary kiln, so that the qualified vanadium-based alloy is produced. The tail gas of the rotary kiln for producing the vanadium-based alloy contains CO and CO2、N2Water vaporGas, trace amounts of other gaseous components and the same solid dust as the charge. The existing treatment method for treating the tail gas of the vanadium-based alloy rotary kiln production line has the disadvantages of large treatment gas amount and poor continuity, and thus has large investment and high cost.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a tail gas treatment method for a vanadium-based alloy rotary kiln production line, the tail gas treated by the method can meet the requirement of environmental protection, the investment for system construction and the material loss are favorably reduced, the production continuity is good, and the cost is favorably reduced.
The invention provides a tail gas treatment method for a vanadium-based alloy rotary kiln production line, which comprises the following steps:
the tail gas is sequentially subjected to temperature regulation, dust removal and combustion treatment,
wherein the temperature regulation comprises controlling the temperature of the tail gas at 480 ℃ of 120-.
Further, the temperature regulation comprises heating and/or first cooling, preferably comprises heating and first cooling;
preferably, the first cooling mode comprises direct heat exchange and/or indirect heat exchange;
preferably, the direct heat exchange comprises heat exchange by directly contacting water with the tail gas;
preferably, the indirect heat exchange comprises heat exchange of the tail gas by taking air and/or water as a heat exchange medium;
preferably, the heating means comprises electrical heating and/or gas heating.
Further, the combustion is carried out in a mode of adding fuel gas and combustion-supporting air;
preferably, the dust removal treatment is performed by a bag-type dust remover and/or a metal film dust remover.
Further, carrying out second cooling treatment on the tail gas after the combustion treatment;
preferably, the temperature of the tail gas after the second cooling treatment is less than 360 ℃.
Further, when at least one of (a) and (b) occurs, venting the exhaust gas after passing into the accident disposal pathway prior to said temperature regulation: (a) opening the furnace at the initial stage; (b) a failure occurs.
The utility model provides a tail gas processing apparatus of vanadium base alloy rotary kiln production line, includes: the device comprises a temperature regulation device, a dust remover and a burner which are communicated in sequence, wherein the temperature of the tail gas in the temperature regulation device is controlled to be 480 ℃ of 120-.
Further, the temperature regulation device comprises a heater and a cooler;
preferably, the heater gas outlet is in communication with the cooler gas inlet; alternatively, the first and second electrodes may be,
the cooler gas outlet is communicated with the heater gas inlet;
preferably, the heater comprises an electric heating device and/or a combustion heating device;
preferably, the cooler comprises an indirect heat exchanger and/or a direct heat exchanger;
preferably, the indirect heat exchanger comprises a shell and tube heat exchanger;
preferably, the direct heat exchanger comprises a spray device.
Further, still include: the heat exchanger comprises a tail gas inlet after combustion and a tail gas outlet after heat exchange, the combustor comprises a tail gas inlet after dust removal and a tail gas outlet after combustion, and the tail gas inlet after combustion is communicated with the tail gas outlet after combustion;
preferably, the heat exchanger is a tube-in-tube self-operated water circulation heat exchanger;
preferably, the dust remover is communicated with the combustor through a fan.
Furthermore, the temperature control device also comprises an accident treatment channel, and a switching valve is arranged between the accident treatment channel and the temperature control device.
The application of the tail gas treatment device in the tail gas treatment of the vanadium-based alloy rotary kiln production line is disclosed.
Compared with the prior art, the invention can at least obtain the following beneficial effects:
in the tail gas treatment method, the temperature of the tail gas is controlled within the range of 480 ℃ of 120-; and dust removal is carried out on tail gas firstly, and then the tail gas after dust removal is combusted, so that the problem that the tail gas cannot enter a dust removal system in a low-temperature or high-temperature state can be avoided, the construction fund of a dust remover can be greatly reduced, the material dust loss is reduced, the temperature control difficulty of the tail gas is reduced, the pollution to the environment and the material loss are reduced, the continuous production of the whole production line is facilitated, and the production cost is reduced.
The tail gas after dust removal can be provided with an extraction pipeline before entering the combustor according to requirements, so that the clean tail gas containing CO is not combusted in the system, and the clean tail gas is additionally utilized, such as used for drying the raw materials entering the furnace and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural view of an exhaust gas treatment device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In one aspect of the invention, the invention provides a tail gas treatment method for a vanadium-based alloy rotary kiln production line, which comprises the following steps:
the tail gas is sequentially subjected to temperature regulation, dust removal and combustion treatment,
wherein the temperature regulation comprises controlling the temperature of the tail gas at 120-480 ℃.
In the tail gas treatment method, the temperature of the tail gas is controlled within the range of 120 plus 480 ℃, which is beneficial to subsequent dust removal, can ensure that the temperature of the tail gas entering a dust remover is always in a reasonable range, reduce operation accidents, reduce the probability that the tail gas must be discharged due to temperature fluctuation, and limit production parameters of a rotary kiln process and the like, ensure that the whole production line keeps better continuous production, greatly reduce the amount of the tail gas entering the dust remover during dust removal, and be beneficial to reducing system construction investment and material loss; and dust removal is carried out on tail gas firstly, and then the tail gas after dust removal is combusted, so that the problem that the tail gas cannot enter a dust removal system in a low-temperature or high-temperature state can be avoided, the construction fund of a dust remover can be greatly reduced, the material dust loss is reduced, the temperature control difficulty of the tail gas is reduced, the pollution to the environment and the material loss are reduced, the continuous production of the whole production line is facilitated, and the production cost is reduced.
The tail gas of the vanadium-based alloy rotary kiln production line refers to the tail gas of the rotary kiln for producing vanadium-based alloy, and contains CO and CO2、N2Water vapour, traces of other gaseous components and/or the same solid dust as the charge.
In some preferred embodiments of the invention, the temperature of the tail gas is controlled at 150-400 ℃.
In some embodiments of the invention, the temperature regulation comprises heating and/or first cooling. Therefore, when the temperature of the tail gas is lower than 120 ℃, the temperature of the tail gas is increased to be within the range of 120-480 ℃ by a heating mode, and when the temperature of the tail gas is higher than 480 ℃, the temperature of the tail gas is reduced to be within the range of 120-480 ℃ by a cooling mode, so that the subsequent steps can be favorably carried out.
In some preferred embodiments of the present invention, the temperature regulation comprises heating and first cooling. Therefore, the temperature of the tail gas can be more accurately controlled within the range of 120-480 ℃ by combining heating and cooling.
It should be noted that, when the temperature regulation includes heating and first cooling, the order of heating and cooling is not limited, and heating may be performed first and then first cooling, or first cooling and then heating may be performed, specifically determined according to the real-time temperature of the tail gas, and it is ensured that the temperature is controlled within the range of 120-.
In some embodiments of the present invention, the first cooling manner includes direct heat exchange and/or indirect heat exchange (for example, when the direct heat exchange and the indirect heat exchange are included, the direct heat exchange is performed first and then the indirect heat exchange is performed, or the indirect heat exchange is performed first and then the direct heat exchange is performed); preferably, the direct heat exchange comprises heat exchange by directly contacting water with the tail gas; preferably, the indirect heat exchange comprises heat exchange of the tail gas by taking air and/or water as a heat exchange medium. Therefore, the cooling mode is various, and the cooling effect is better.
It should be noted that, direct heat exchange can be for directly spraying water in the tail gas so that the tail gas cools down, and indirect heat exchange can be for letting in the tail gas in the indirect heat exchanger, utilize cooling water or air to cool off the tail gas.
In some embodiments of the invention, the heating comprises electrical heating and/or gas heating.
The gas heating may be heating the gas using a gas, and further heating the exhaust gas using the heated hot gas.
It can be understood that the tail gas with the temperature regulated at 120-.
In some embodiments of the invention, the combustion is carried out with the addition of fuel gas and combustion air. Therefore, the complete combustion of CO in the tail gas is ensured, and the requirements of safe production and environmental protection are met.
In some embodiments of the invention, the dust removal process is performed by a bag-type dust remover and/or a metal film dust remover.
In some embodiments of the invention, the combustion treated tail gas is subjected to a second cooling treatment. Therefore, the exhaust gas is favorably discharged to the atmosphere at a certain height through the pipeline.
In some embodiments of the invention, the temperature of the tail gas after the second cooling treatment is less than 360 ℃.
In some embodiments of the invention, when at least one of (a) and (b) occurs, the exhaust gas is vented after passing into the accident disposal shaft prior to said temperature conditioning: (a) opening the furnace at the initial stage; (b) a failure occurs.
It should be noted that the fault includes a short-time fault and a fault that needs to be handled for a long time (e.g., a fault in a washing system); in some embodiments of the present invention, at the beginning of the furnace opening, the tail gas is directly discharged into the atmosphere, and after the temperature in the rotary kiln furnace reaches a set value, the rotary kiln furnace is switched to a tail gas treatment channel (it should be noted that the tail gas treatment channel refers to a system for treating the tail gas, and includes the temperature regulation, dust removal, combustion treatment and second cooling described above, and the tail gas is treated according to the method described above in the region where the tail gas passes through the treatment process described above; when a short-time fault occurs, the tail gas is switched from the tail gas treatment channel to the accident treatment channel, the tail gas is directly discharged into the atmosphere, then the accident treatment is completed, and then the tail gas is switched from the accident treatment channel to the tail gas treatment channel; when a fault needing to be treated for a long time occurs, the tail gas is switched from the tail gas treatment channel to the accident treatment channel, the tail gas is directly discharged into the atmosphere, and meanwhile, the production system enters a shutdown procedure. Wherein, the accident treatment channel and the tail gas treatment channel are switched by a switching valve. It will be appreciated that the incident treatment tunnel may be a duct which allows exhaust gases to be vented to the atmosphere, and at this point the rotary kiln will cease to heat and the production line will enter the incident treatment process.
In another aspect of the present invention, the present invention provides a tail gas treatment device for a vanadium-based alloy rotary kiln production line, comprising: the device comprises a temperature regulation device, a dust remover and a burner which are communicated in sequence, wherein the temperature of the tail gas in the temperature regulation device is controlled to be 480 ℃ of 120-.
It should be noted that the temperature control device corresponds to the temperature control, the dust remover corresponds to the dust removal, and the burner corresponds to the combustion, which are not described herein again.
In some embodiments of the invention, the temperature regulation device comprises a heater and a cooler.
The heater corresponds to the heating described above, and the cooler corresponds to the first cooling described above. The arrangement of the heater and the cooler is not limited, and the heater may be arranged between the dust remover and the cooler, or the cooler may be arranged between the dust remover and the heater.
In some embodiments of the invention, the heater gas outlet is in communication with a cooler gas inlet; alternatively, the cooler gas outlet is in communication with the heater gas inlet.
When the gas outlet of the heater is communicated with the gas inlet of the cooler, the cooler is arranged between the heater and the dust remover and is communicated with the dust remover, and tail gas is heated by the heater and then cooled by the cooler and then enters the dust remover; when the cooler gas outlet is communicated with the heater gas inlet, the heater is arranged between the cooler and the dust remover and communicated with the dust remover, and the tail gas is cooled by the cooler and then heated by the heater and then enters the dust remover.
In some embodiments of the invention, the heater comprises an electric heating device and/or a combustion heating device, and the cooler comprises an indirect heat exchanger and/or a direct heat exchanger, preferably the indirect heat exchanger comprises a shell and tube heat exchanger and the direct heat exchanger comprises a spraying device.
In some embodiments of the invention, the dust separator comprises a bag filter, preferably the bag filter comprises a cloth bag and/or a metal film dust separator.
It will be appreciated that the dust collector includes a dust hopper in which dust is gradually enriched and is discharged from the dust hopper when the dust is enriched to a certain amount, for example, a level gauge may be provided in the dust hopper of the dust collector, and after a high level signal from the level gauge is sent, the system program automatically performs pressure equalization and operation of upper and lower dust discharge valves, in which dust discharge time is provided and dust is discharged into a prepared container.
In some embodiments of the invention, the dust separator is in communication with the burner via a fan. Therefore, the pressure of the system can be adjusted by the fan, so that tail gas can smoothly enter the combustor.
In some embodiments of the invention, the exhaust gas treatment device further comprises: the heat exchanger, the heat exchanger includes the tail gas export after burning import and heat transfer, the combustor includes dust removal back tail gas import and the export of burning back tail gas, the import of burning back tail gas with the export of burning back tail gas is linked together. In some embodiments of the invention, the heat exchanger comprises a tube heat exchanger or other water-cooled heat exchange device with forced circulation.
It should be noted that, the heat exchanger corresponds to the second cooling described above, and can cool the burned tail gas, which is convenient for evacuation. In some embodiments of the invention, the heat exchanger is a tube-in-tube self-operated water circulation heat exchanger.
In some embodiments of the invention, the temperature control device further comprises an accident treatment channel, and a switching valve is arranged between the accident treatment channel and the temperature control device. It should be noted that the accident handling path is consistent with the foregoing description, and will not be described in detail herein.
It can be understood that when the furnace is opened in the early stage or has a fault, the tail gas is communicated with the accident treatment channel through the switching valve, and the communication with the temperature regulation and control device is cut off; except for the initial stage of furnace opening and the fault condition, the tail gas is communicated with the temperature control device through the switching valve and then is treated through the device, and the communication with the accident treatment channel is cut off. The accident disposal passage may be a pipe communicating with the switching valve to facilitate evacuation of the exhaust gas, and will not be described in detail herein.
In some embodiments of the present invention, the tail gas treatment device further comprises a control cabinet for controlling the rotation speed of the fan, the opening and closing of the valve, the automatic control of the system, and the like.
In some embodiments of the present invention, referring to fig. 1, an exhaust gas treatment device includes:
the switching valve 4 is used for discharging tail gas into the accident processing channel 500 through the switching valve 4 and further exhausting the tail gas at the initial blowing-in stage and when a fault occurs; in the initial stage of non-furnace opening and non-failure, tail gas enters the cooler 120 through the switching valve 4 through the cooler gas inlet 121, is cooled and then is discharged from the cooler gas outlet 122, and enters the heater 110 through the heater gas inlet 111, and is heated and then is discharged from the heater gas outlet 112; the tail gas is subjected to heat exchange by the cooler and the heat exchanger, so that the temperature of the tail gas is accurately regulated within a required temperature range, and the subsequent dust removal treatment is facilitated;
the tail gas discharged from the heater gas outlet 112 enters the dust remover 200 through the dust remover inlet 210, after the tail gas is dedusted, the dedusted and purified tail gas is discharged from the dust remover outlet 220, and after the dust is collected, the dust is discharged through the dust outlet 230;
the tail gas after dust removal and purification is discharged from the dust remover outlet 220, enters the high-temperature frequency modulation fan 1 through the fan inlet 11, is discharged from the fan outlet 12, enters the check valve 2 through the check valve inlet 21, and is discharged from the check valve outlet 22; combustion air enters the fan 3 from a fan inlet 31 and is discharged from a fan outlet 32; the added fuel gas, the combustion air discharged from the outlet 32 of the fan and the tail gas discharged from the outlet 22 of the check valve after dust removal and purification are mixed at the inlet 33, the mixed gas enters the burner 300 from the tail gas inlet 310 after dust removal, the tail gas is combusted in the burner 300, and the product after combustion treatment is discharged from the tail gas outlet 320 after combustion;
products discharged from the burnt tail gas outlet 320 enter the heat exchanger 400 through the burnt tail gas inlet 410, are discharged from the heat exchange tail gas outlet 420 after cooling the tail gas and meeting the discharge requirement, and are directly discharged into the atmosphere through the discharge pipeline.
In some embodiments of the present invention, the operating principle of the exhaust gas treatment device is as follows:
after the system is started, the switching valve is arranged in the accident treatment channel, and after the temperature in the rotary kiln furnace reaches a set value, the rotary kiln furnace enters the tail gas treatment channel. When the temperature of the tail gas is lower than the allowable lower limit temperature value of the dust remover (for example, 120 ℃), the heater is started to heat the tail gas until the temperature is higher than a certain set value. And when the temperature of the tail gas is higher than the allowable upper limit temperature value (for example 480 ℃) of the dust remover, starting the cooler to cool the tail gas until the temperature is lower than a certain set value. And when the temperature of the tail gas is in an allowable upper and lower limit temperature range of the dust remover, the related heater and the related cooler are not started, the tail gas enters the dust remover for dust removal, dust enters the dust remover ash bucket, after a high material level signal of a material level meter of the dust remover ash bucket is sent out, a system program automatically carries out the operations of pressure equalization and upper and lower ash discharge valves, ash discharge time is set in the system program, and the dust removed ash is discharged into a prepared container. When tail gas enters the tail gas treatment channel, the pressure of the treatment system is adjusted by a high-temperature frequency modulation fan behind the dust remover, and the pressure control range is manually set in a PLC of the control cabinet. The tail gas from the dust remover enters a combustor for combustion, and the combustor ignites and assists in combustion in a mode of adding fuel gas and combustion air to ensure that CO in the tail gas is consumed into CO2Meets the requirement of environmental protection. And the combusted gas enters the heat exchanger and then is discharged into the atmosphere through a discharge pipe.
In another aspect of the invention, the invention provides the application of the tail gas treatment device in the tail gas treatment of the vanadium-based alloy rotary kiln production line.
Some embodiments of the present invention will be described in detail below with reference to specific examples. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Examples
Example 1
The tail gas treatment method of the vanadium-based alloy rotary kiln production line comprises the following steps:
and sequentially carrying out temperature regulation, dust removal, combustion treatment and fault treatment on the tail gas.
Wherein the temperature regulation comprises the steps of cooling and heating the tail gas in sequence, so that the temperature of the tail gas entering the dust remover is regulated to be between 120 ℃ and 400 ℃ and then enters the dust remover; and tail gas passing through the dust remover enters the combustor for combustion through the fan, and the combustion tail gas is cooled through the heat exchanger and then is discharged into the atmosphere through a pipeline. When a fault occurs, the tail gas of the rotary kiln is switched to an accident discharge channel and does not enter a tail gas treatment system.
Example 2
The tail gas treatment method of the vanadium-based alloy rotary kiln production line is the same as that in the embodiment 1, and the difference is that the temperature regulation and control comprises the step of controlling the temperature of the tail gas to be between 120 ℃ and 250 ℃.
Example 3
The tail gas treatment method of the vanadium-based alloy rotary kiln production line is the same as that in the embodiment 1, and the difference is that the temperature regulation and control comprises the step of controlling the temperature of the tail gas to be 120-200 ℃.
Comparative example 1
The tail gas treatment method of the vanadium-based alloy rotary kiln production line comprises the following steps:
burning the tail gas of the rotary kiln, heat exchange and cooling, dust removal, emission and fault treatment.
The combustion, namely the tail gas discharged from the tail gas outlet of the rotary kiln, is firstly carried out, the temperature of the tail gas after the combustion is reduced to 120-400 ℃ through a heat exchanger, the tail gas enters a dust remover for dust removal, and then the tail gas is discharged into the atmosphere through a fan and a pipeline. When a fault occurs, the tail gas of the rotary kiln is switched to an accident discharge channel and does not enter a tail gas treatment system.
Comparative example 2
The tail gas treatment method of the vanadium-based alloy rotary kiln production line is the same as the comparative example 1, and the difference is that the temperature of the tail gas is controlled between 120 ℃ and 250 ℃.
The comparative example can reduce the difficulty of temperature control, but needs a high-temperature cloth bag.
Comparative example 3
The tail gas treatment method of the vanadium-based alloy rotary kiln production line is the same as the comparative example 1, and the difference is that the temperature of the tail gas is controlled between 120 ℃ and 200 ℃.
The comparative example can further reduce the difficulty of temperature control, and a common low-temperature cloth bag type dust collector can be used.
The investment and characteristics of the tail gas treatment methods of examples 1-3 and comparative examples 1-3 are shown in table 1 below:
TABLE 1
Note: the investment is as follows: ten thousand yuan per hour per hundred standard square of tail gas is treated.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A tail gas treatment method for a vanadium-based alloy rotary kiln production line is characterized by comprising the following steps:
the tail gas is sequentially subjected to temperature regulation, dust removal and combustion treatment,
wherein the temperature regulation comprises controlling the temperature of the tail gas at 480 ℃ of 120-.
2. The exhaust gas treatment method according to claim 1, wherein the temperature regulation comprises heating and/or first cooling, preferably heating and first cooling;
preferably, the first cooling mode comprises direct heat exchange and/or indirect heat exchange;
preferably, the direct heat exchange comprises heat exchange by directly contacting water with the tail gas;
preferably, the indirect heat exchange comprises heat exchange of the tail gas by taking air and/or water as a heat exchange medium;
preferably, the heating means comprises electrical heating and/or gas heating.
3. The tail gas treatment method according to claim 1, wherein the combustion is performed by means of additional gas and combustion air;
preferably, the dust removal treatment is performed by a bag-type dust remover and/or a metal film dust remover.
4. The exhaust gas treatment method according to claim 3, wherein the exhaust gas after the combustion treatment is subjected to a second cooling treatment;
preferably, the temperature of the tail gas after the second cooling treatment is less than 360 ℃.
5. The exhaust gas treatment method according to claim 1, 2 or 4, wherein when at least one of (a) and (b) occurs, the exhaust gas is evacuated after passing into the accident disposal shaft before the temperature regulation: (a) opening the furnace at the initial stage; (b) a failure occurs.
6. The utility model provides a tail gas processing apparatus of vanadium base alloy rotary kiln production line which characterized in that includes: the device comprises a temperature regulation device, a dust remover and a burner which are communicated in sequence, wherein the temperature of the tail gas in the temperature regulation device is controlled to be 480 ℃ of 120-.
7. The exhaust gas treatment device according to claim 6, wherein the temperature regulation device comprises a heater and a cooler;
preferably, the heater gas outlet is in communication with the cooler gas inlet; alternatively, the first and second electrodes may be,
the cooler gas outlet is communicated with the heater gas inlet;
preferably, the heater comprises an electric heating device and/or a combustion heating device;
preferably, the cooler comprises an indirect heat exchanger and/or a direct heat exchanger;
preferably, the indirect heat exchanger comprises a shell and tube heat exchanger;
preferably, the direct heat exchanger comprises a spray device.
8. The exhaust gas treatment device according to claim 7, further comprising: the heat exchanger comprises a tail gas inlet after combustion and a tail gas outlet after heat exchange, the combustor comprises a tail gas inlet after dust removal and a tail gas outlet after combustion, and the tail gas inlet after combustion is communicated with the tail gas outlet after combustion;
preferably, the heat exchanger is a tube-in-tube self-operated water circulation heat exchanger;
preferably, the dust remover is communicated with the combustor through a fan.
9. The exhaust gas treatment device according to any one of claims 6 to 8, further comprising an accident treatment channel, wherein a switching valve is arranged between the accident treatment channel and the temperature control device.
10. Use of a tail gas treatment device according to any one of claims 6 to 9 in the treatment of tail gas from a vanadium-based alloy rotary kiln production line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911073616.0A CN110763037A (en) | 2019-11-05 | 2019-11-05 | Tail gas treatment method and device for vanadium-based alloy rotary kiln production line and application of tail gas treatment method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911073616.0A CN110763037A (en) | 2019-11-05 | 2019-11-05 | Tail gas treatment method and device for vanadium-based alloy rotary kiln production line and application of tail gas treatment method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110763037A true CN110763037A (en) | 2020-02-07 |
Family
ID=69336485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911073616.0A Pending CN110763037A (en) | 2019-11-05 | 2019-11-05 | Tail gas treatment method and device for vanadium-based alloy rotary kiln production line and application of tail gas treatment method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110763037A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445333A (en) * | 2008-11-25 | 2009-06-03 | 中信重工机械股份有限公司 | Method for calcining active lime by taking tail gas from sealing type calcium carbide furnace as fuel for rotary kiln |
| CN201285050Y (en) * | 2008-08-12 | 2009-08-05 | 南京苏冶钙业技术有限公司 | Tail gas combustion utilization apparatus for calcium carbide furnace |
| CN102258923A (en) * | 2011-04-29 | 2011-11-30 | 青海宜化化工有限责任公司 | Method for recycling and reusing tail gas of calcium carbide furnace |
| CN104329949A (en) * | 2014-10-24 | 2015-02-04 | 安东新材料（遂宁）有限公司 | Rotary kin tail gas utilization equipment |
| CN204359150U (en) * | 2014-12-28 | 2015-05-27 | 大连华锐重工集团股份有限公司 | The furnace gas sensible heat utilization system of closed submerged stove |
-
2019
- 2019-11-05 CN CN201911073616.0A patent/CN110763037A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201285050Y (en) * | 2008-08-12 | 2009-08-05 | 南京苏冶钙业技术有限公司 | Tail gas combustion utilization apparatus for calcium carbide furnace |
| CN101445333A (en) * | 2008-11-25 | 2009-06-03 | 中信重工机械股份有限公司 | Method for calcining active lime by taking tail gas from sealing type calcium carbide furnace as fuel for rotary kiln |
| CN102258923A (en) * | 2011-04-29 | 2011-11-30 | 青海宜化化工有限责任公司 | Method for recycling and reusing tail gas of calcium carbide furnace |
| CN104329949A (en) * | 2014-10-24 | 2015-02-04 | 安东新材料（遂宁）有限公司 | Rotary kin tail gas utilization equipment |
| CN204359150U (en) * | 2014-12-28 | 2015-05-27 | 大连华锐重工集团股份有限公司 | The furnace gas sensible heat utilization system of closed submerged stove |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107014217A (en) | Coke-oven plant's coke-stove gas is utilized and smoke processing system and its processing method | |
| ES8103197A1 (en) | Process for baking carbon electrodes. | |
| CN111569623A (en) | Internal and external circulation system and circulation method for sintering flue gas | |
| WO2021068499A1 (en) | Anhydrite preparation system | |
| CN109307435B (en) | Coke oven flue gas back-mixing system and method | |
| CN110763037A (en) | Tail gas treatment method and device for vanadium-based alloy rotary kiln production line and application of tail gas treatment method and device | |
| CN102954476A (en) | Processing method of tail gas containing trace organic constituents | |
| CN209978641U (en) | Tunnel cave waste heat recovery distribution output device | |
| CN108947280B (en) | Furnace gas circulation type limestone flame-proof calcining system | |
| CN106807188A (en) | A kind of waste gas treatment process | |
| JP2006335956A (en) | Method of recovering surplus offgas in coke dry quenching equipment | |
| CN207247227U (en) | A kind of humidity control system of RTO oxidation furnaces | |
| CN215864592U (en) | Microwave heat supply belt type roasting system | |
| CN105486096A (en) | Waste-heat utilization method and device for indirect heating type sintering system | |
| CN104006672A (en) | Method for smoke discharging and dedusting of steel making electric furnace | |
| CN108706547A (en) | One kind is with H2S and the device and method that petroleum coke is raw materials recovery sulphur | |
| JP2912637B2 (en) | Coke dry fire extinguishing method | |
| CN205590305U (en) | Carbomorphism tail gas waste heat recovery's oxidation carbomorphism device | |
| CN210108048U (en) | Combustion-supporting oxygen and nitrogen distribution system device | |
| JP2000105084A (en) | Exhaust gas treating method and apparatus for sintering machine | |
| CN103343964B (en) | Combustion method for greatly improving thermal efficiency of industrial furnace by alcohol-based clean fuel | |
| CN104110970B (en) | Exhaust heat recovering method based on maximization stove | |
| CN206875996U (en) | Coke-oven plant's coke-stove gas utilizes and smoke processing system | |
| CN210570058U (en) | Harmless treatment system for flue gas of electric furnace | |
| CN204085148U (en) | Coal gasification and heat treatment all-in-one oven |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200207 |