CN116294578A - Roller kiln and gas control device thereof - Google Patents
Roller kiln and gas control device thereof Download PDFInfo
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- CN116294578A CN116294578A CN202310575613.7A CN202310575613A CN116294578A CN 116294578 A CN116294578 A CN 116294578A CN 202310575613 A CN202310575613 A CN 202310575613A CN 116294578 A CN116294578 A CN 116294578A
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- furnace pressure
- pressure value
- roller kiln
- detection device
- gas control
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 121
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 121
- 239000001301 oxygen Substances 0.000 claims abstract description 121
- 239000007789 gas Substances 0.000 claims abstract description 83
- 230000001105 regulatory effect Effects 0.000 claims abstract description 71
- 238000001514 detection method Methods 0.000 claims description 58
- 230000007423 decrease Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 16
- 239000000047 product Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910003002 lithium salt Inorganic materials 0.000 description 4
- 159000000002 lithium salts Chemical class 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000010405 anode material Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
- F27B9/045—Furnaces with controlled atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Tunnel Furnaces (AREA)
Abstract
The invention discloses a roller kiln and a gas control device thereof, wherein the gas control device of the roller kiln comprises: the oxygen atmosphere instrument is used for detecting the oxygen concentration in the roller kiln; the gate valve is arranged on a wild air inlet pipeline communicated with the exhaust pipeline of the roller kiln and is used for adjusting the wild air inlet quantity of the roller kiln; the first electric regulating valve is arranged on an exhaust pipeline of the roller kiln; the controller, oxygen atmosphere appearance and first electronic governing valve are all connected with the controller, and the controller is according to the oxygen concentration that oxygen atmosphere appearance detected regulation push-pull valve with the aperture of first electronic governing valve, until the oxygen concentration in the roller kiln satisfies the requirement. The gas control device of the roller kiln realizes the purposes of automatically detecting the oxygen atmosphere and automatically adjusting the oxygen atmosphere, does not need manual operation, is beneficial to reducing the operation intensity, improves the response speed and ensures the quality of products.
Description
Technical Field
The invention relates to the technical field of roller kilns, in particular to a roller kiln and a gas control device thereof.
Background
The roller kiln is a non-arch kiln, and is a tunnel kiln with a long and narrow section. The kiln top of the roller kiln is of a flat suspended ceiling type structure, in particular, the kiln top is a roller bed formed by rollers which are arranged in parallel and transversely penetrate through the section of a working channel of the kiln, products are placed on the roller bed and conveyed into the kiln along with the rotation of the rollers, and the firing process is completed in the kiln.
When the roller kiln heats the mixture of the precursor material and the lithium salt, the roller kiln has higher requirements on the oxygen atmosphere in the roller kiln, and if the oxygen purity is low, the quality of the product can be influenced.
At present, the adjustment of air inlet and air outlet of the roller kiln is mostly carried out by manual adjustment. However, the atmosphere change of oxygen is related to the reaction speed in the roller kiln, and the manual adjustment is difficult to react in time, so that the quality of the product is affected.
Therefore, how to realize automatic adjustment of the atmosphere in the roller kiln is a technical problem to be solved urgently by the person skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a gas control device of a roller kiln, which realizes automatic adjustment of atmosphere in the roller kiln. In addition, the invention also provides a roller kiln with the gas control device.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a gas control device for a roller kiln, comprising:
the oxygen atmosphere instrument is used for detecting the oxygen concentration in the roller kiln;
the gate valve is arranged on an air inlet pipeline communicated with the air exhaust pipeline of the roller kiln and used for adjusting the wild air inlet quantity of the roller kiln;
the first electric regulating valve is arranged on the exhaust pipeline of the roller kiln;
and the controller is connected with the oxygen atmosphere instrument and the first electric regulating valve, and adjusts the opening of the gate valve and the opening of the first electric regulating valve according to the oxygen concentration detected by the oxygen atmosphere instrument until the oxygen concentration in the roller kiln meets the requirement.
Preferably, in the gas control device for a roller kiln, the controller acquires the detected oxygen concentration of the oxygen atmosphere instrument, compares the detected oxygen concentration with an atmosphere preset value pre-stored in the controller, and adjusts the opening of the gate valve and the opening of the first electric regulating valve according to a comparison result until the oxygen concentration in the roller kiln meets the requirement.
Preferably, in the gas control device for a roller kiln, if the detected oxygen concentration of the oxygen atmosphere instrument is smaller than the atmosphere preset value, the controller increases the opening of the first electric regulating valve and decreases the opening of the gate valve until the oxygen concentration in the roller kiln meets the requirement.
Preferably, the gas control device of a roller kiln further comprises:
the exhaust fan is arranged on the exhaust pipeline and is used for exhausting the gas in the roller kiln;
the air pipeline pressure measuring transmitter is arranged on the exhaust pipeline and connected with the controller and used for adjusting the pressure of gas in the exhaust pipeline.
Preferably, the gas control device of a roller kiln further comprises:
the air storage tank is communicated with a first pipeline, and the first pipeline is communicated with the roller kiln;
the second electric regulating valve is arranged on the first pipeline and is used for regulating the flow area of the first pipeline;
the first furnace pressure detection device and the second furnace pressure detection device are used for detecting furnace pressure values of different positions of the driving side in the roller kiln;
the first furnace pressure detection device, the second furnace pressure detection device and the second electric regulating valve are all connected with the controller, and the controller regulates the opening degree of the second electric regulating valve according to the furnace pressure value detected by the first furnace pressure detection device and the second furnace pressure detection device until the furnace pressure values detected by the first furnace pressure detection device and the second furnace pressure detection device all meet preset furnace pressure values.
Preferably, in the gas control device of a roller kiln described above,
the controller obtains a first pressure value detected by the first furnace pressure detection device and a second pressure value detected by the second furnace pressure detection device, compares the first pressure value and the second pressure value with the preset furnace pressure value respectively, and adjusts the opening of the second electric regulating valve according to a comparison result until the furnace pressure values detected by the first furnace pressure detection device and the second furnace pressure detection device meet the preset furnace pressure value.
Preferably, in the gas control device for a roller kiln, if the first pressure value and the second pressure value are both greater than the preset furnace pressure value, the controller controls the second electric control valve to reduce the opening;
and if the first pressure value and the second pressure value are smaller than the preset furnace pressure value, the controller controls the second electric regulating valve to increase the opening.
Preferably, the gas control device of a roller kiln further comprises:
one end of the second pipeline is communicated with the air storage tank, and the other end of the second pipeline is communicated with the passive side air inlet and the active side air inlet of the roller kiln; the second furnace pressure detection device is used for detecting a furnace pressure value of the air inlet of the active side;
the third electric regulating valve is arranged on the second pipeline and is used for regulating the flow area of the second pipeline;
and when the furnace pressure value detected by the first furnace pressure detection device acquired by the controller meets the requirement, the opening of the third electric regulating valve is regulated according to the furnace pressure value detected by the second furnace pressure detection device until the furnace pressure value detected by the second furnace pressure detection device meets the requirement.
Preferably, in the gas control device of a roller kiln described above,
the controller acquires a first pressure value detected by the first furnace pressure detection device and a second pressure value detected by the second furnace pressure detection device, and compares the first pressure value and the second pressure value with the preset furnace pressure value respectively;
and if the first pressure value meets the requirement and the second pressure value does not meet the requirement, the controller adjusts the opening of the third electric adjusting valve according to the comparison result of the second pressure value and the preset furnace pressure value until the furnace pressure value detected by the second furnace pressure detecting device meets the preset furnace pressure value.
Preferably, in the gas control device for a roller kiln, if the second pressure value is greater than the preset furnace pressure value, the controller controls the third electric regulating valve to reduce the opening;
and if the second pressure value is smaller than the preset furnace pressure value, the controller controls the third electric regulating valve to increase the opening degree.
Preferably, the gas control device of a roller kiln further comprises:
the first furnace pressure detection device detects the furnace pressure value of the second branch;
the fourth electric regulating valve is arranged on the third pipeline and is used for regulating the flow area of the third pipeline;
and when the furnace pressure value detected by the second furnace pressure detection device acquired by the controller meets the requirement, the opening of the fourth electric regulating valve is regulated according to the furnace pressure value detected by the first furnace pressure detection device until the furnace pressure value detected by the first furnace pressure detection device meets the requirement.
Preferably, in the gas control device of a roller kiln described above,
the controller acquires a first pressure value detected by the first furnace pressure detection device and a second pressure value detected by the second furnace pressure detection device, and compares the first pressure value and the second pressure value with the preset furnace pressure value respectively;
and if the second pressure value meets the requirement, and the first pressure value does not meet the requirement, the controller adjusts the opening of the fourth electric regulating valve according to the comparison result of the first pressure value and the preset furnace pressure value until the furnace pressure value detected by the first furnace pressure detecting device meets the preset furnace pressure value.
Preferably, in the gas control device for a roller kiln, if the furnace pressure value detected by the first furnace pressure detecting device is greater than the preset furnace pressure value, the controller controls the fourth electric regulating valve to reduce the opening;
and if the furnace pressure value detected by the first furnace pressure detection device is smaller than the preset furnace pressure value, the controller controls the fourth electric regulating valve to increase the opening.
Preferably, in the gas control device for a roller kiln, before the controller obtains the first pressure value detected by the first furnace pressure detecting device and the second pressure value detected by the second furnace pressure detecting device, the gas control device further includes:
and determining that the oxygen concentration in the roller kiln meets the requirement.
Preferably, the gas control device of a roller kiln further comprises:
the air storage tank pressure detection device is used for detecting the pressure in the air storage tank and is connected with the controller;
the fifth electric regulating valve is used for regulating the on-off of the inlet of the air storage tank and is connected with the controller.
A roller kiln comprising a gas control device, wherein the gas control device is a gas control device according to any one of the above,
and the number of the gas control devices is plural.
The invention provides a gas control device of a roller kiln, which is characterized in that the oxygen concentration in the roller kiln is obtained by arranging an oxygen atmosphere instrument and is fed back to a controller, the controller compares the detected oxygen concentration with a preset atmosphere preset value according to the oxygen atmosphere instrument, determines whether the oxygen concentration in the roller kiln meets the requirement according to a comparison result, and controls the opening of a first electric regulating valve and a gate valve when the roller kiln does not meet the requirement, so that the oxygen concentration in the roller kiln is changed until the oxygen concentration in the roller kiln meets the requirement. Namely, the gas control device of the roller kiln realizes the purposes of automatically detecting the oxygen atmosphere and automatically adjusting the oxygen atmosphere, does not need manual operation, is beneficial to reducing the operation intensity, improves the response speed and ensures the quality of products.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a gas control device of a roller kiln disclosed in an embodiment of the present invention;
FIG. 2 is a schematic diagram of an oxygen atmosphere instrument according to an embodiment of the present invention;
fig. 3 is a schematic view of a partial structure of a roller kiln according to an embodiment of the invention.
Wherein,,
the air storage device comprises a fifth electric regulating valve 1, an air storage tank 2, a passive side air inlet 3, a ball valve 4, a flowmeter 5, a passive side heating rod lower air inlet 6, a passive side heating rod upper air inlet 7, a passive side transmission box air inlet 8, a first furnace pressure transmitter 9, an active side transmission box air inlet 10, an active side heating rod upper air inlet 11, an active side heating rod lower air inlet 12, an active side air inlet 13, an oxygen atmosphere side point 14, an electromagnetic valve 15, an oxygen atmosphere instrument 16, an oil mist separator 161, a scattered cotton 162, an activated carbon 163, a color changing silica gel 164, an oxygen distributor 165, a second furnace pressure transmitter 17, a wild air inlet 18, a push-pull valve 19, an exhaust pipeline pressure measuring device 20, a first electric regulating valve 21, a first electric regulating valve 22, a PLC23, a bottom air inlet flow meter 24, a third electric regulating valve 25, a second electric regulating valve 26, a fourth electric regulating valve 27, a manual ball valve 28 and a pressure transmitter 29.
Detailed Description
The invention discloses a gas control device of a roller kiln, which realizes automatic adjustment of atmosphere in the roller kiln. In addition, the invention also discloses a roller kiln with the gas control device.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The roller kiln is a non-arch kiln, and is a tunnel kiln with a long and narrow section. The kiln top structure is a flat suspended ceiling type, a roller bed is formed by a roller which is arranged in parallel and transversely crosses the cross section of a working channel of the kiln, products are placed on the roller bed and conveyed into the kiln along with the rotation of the roller, and the firing process is completed in the kiln.
When the roller kiln heats the mixture of the precursor material and the lithium salt, the roller kiln has higher requirements on the oxygen atmosphere in the roller kiln, and if the oxygen purity is low, the quality of the product can be influenced.
The heating section needs materials to be heated according to a preset heating curve, and the constant temperature section is a main physicochemical reaction stage, namely, lithium salt and precursor materials are continuously fused, oxidation reaction occurs between the lithium salt and the precursor materials, and waste gases such as carbon dioxide or water (in the form of gas) are generated. It should be noted that the heating section and the constant temperature section are both working sections of the roller kiln.
Because the heating section and the constant temperature section both need to consume oxygen and different anode materials, when the heating section and the constant temperature section consume different oxygen, the produced waste gas is different, so that the air inlet and the air outlet of the roller kiln are required to be continuously adjusted in order to meet the atmosphere requirement in the roller kiln and the furnace pressure requirement.
At present, the adjustment of air inlet and air outlet of the roller kiln is mostly carried out by manual adjustment. However, the atmosphere change of oxygen is related to the reaction speed in the roller kiln, and the manual adjustment is difficult to react in time, so that the quality of the product is affected.
In view of this, disclosed in this application is a gas control device of roller kiln, adjusts the air inlet and the exhaust of roller kiln, and then realizes the regulation to the oxygen atmosphere and the stove pressure in the roller kiln, guarantees that the oxygen atmosphere of roller kiln satisfies the requirement, and then guarantees the quality of product. In addition, through adjusting the air inlet and the air outlet of the roller kiln, the adjustment of the furnace pressure in the roller kiln can be realized, the furnace pressure of the roller kiln is ensured to meet the requirements, and the quality of products is further ensured.
As shown in fig. 1, the gas control device of the roller kiln comprises: a programmable logic controller (Programmable Logic Controller, PLC), an exhaust fan 22, a first electric regulating valve 21, an exhaust pipeline pressure measuring transmitter 20, a gate valve 19, a wild wind inlet 18 and an oxygen atmosphere instrument 16.
The wild wind inlet 18 is an air inlet of an air inlet pipeline communicated with an air exhaust branch pipe of an air exhaust pipeline of the roller kiln, and the air inlet pipeline is an air inlet pipeline of wild wind (external wind) in the air inlet pipeline. The gate valve 19 is arranged on an air inlet branch pipe of the air inlet pipeline and used for adjusting the air inlet quantity of the wild air. The exhaust fan 22 is communicated with the exhaust pipeline, and the exhaust of the exhaust pipeline can be powered by the exhaust fan 22. When the power of the exhaust fan 22 is unchanged, the exhaust fan 22 is always used for exhausting air under constant pressure and constant flow.
The roller kiln structure in the present application is not disclosed, but only the relation between the PLC23 and the components at each position is disclosed, specifically as follows:
the exhaust pipe pressure measuring transmitter 20 is connected with the PLC23, wherein the exhaust pipe pressure measuring transmitter 20 is arranged on an exhaust pipe and used for detecting and adjusting the exhaust pressure and sending the detected pressure information to the PLC23. By arranging the pressure measuring transmitter 20 of the exhaust pipeline, the micro-positive pressure stability in the roller kiln can be maintained, and the continuous stability and effectiveness of gas replacement in the roller kiln are facilitated.
The oxygen atmosphere instrument 16 has an oxygen atmosphere side point 14, the oxygen atmosphere side point 14 is used as a detection point for detecting oxygen, oxygen in the roller kiln can be detected through the oxygen atmosphere side point 14, and the oxygen concentration in the roller kiln can be obtained through the oxygen atmosphere instrument 16.
The first electric control valve 21 is arranged on the exhaust duct and adjusts the amount of gas discharged from the roller kiln through the exhaust duct according to the control instruction of the PLC23.
The first electric regulating valve 21 and the oxygen atmosphere instrument 16 are both connected with the PLC23, and the oxygen atmosphere instrument 16 feeds back the obtained oxygen concentration in the roller kiln to the PLC23. The PLC23 compares the oxygen concentration obtained by the oxygen atmosphere instrument 16 with a preset atmosphere preset value, and determines whether the oxygen concentration in the roller kiln meets the requirement according to the comparison result. When the oxygen concentration in the roller kiln does not meet the requirement, the PLC23 adjusts the opening of the first electric adjusting valve 21, so that the oxygen concentration in the roller kiln is adjusted until the oxygen concentration in the roller kiln meets the requirement.
If the oxygen concentration obtained by the oxygen atmosphere instrument 16 is lower than the atmosphere preset value, the PLC23 increases the opening degree of the first electric regulating valve 21, namely the amount of the gas discharged out of the roller kiln; the PLC23 reduces the opening degree of the gate valve 19, so that the air inlet quantity of the wild wind passing through the wild wind inlet 18 is reduced; the power of the exhaust fan 22 can be unchanged, so that the exhaust fan 22 maintains constant pressure and constant flow for exhaust, gas in the roller kiln is exhausted rapidly, and dilution and replacement of the gas in the roller kiln are facilitated until the oxygen concentration detected by the oxygen atmosphere instrument 16 meets the atmosphere preset value.
It should be noted that: the gate valve 19 and the first electric regulating valve 21 are in opposite relation, and if the first electric regulating valve 21 is increased, the gate valve 19 is reduced, so that more gas in the roller kiln is extracted, and the oxygen concentration reaches the standard. After reaching the standard, the opening degree of the first electric regulating valve 21 is reduced, and the opening degree of the gate valve 19 is increased.
In some embodiments, the atmosphere preset value is a range value, and the oxygen concentration detected by the oxygen atmosphere instrument 16 is within the range value, which indicates that the oxygen concentration detected by the oxygen atmosphere instrument 16 satisfies the atmosphere preset value.
According to the description, the oxygen concentration in the roller kiln is obtained by setting the oxygen atmosphere instrument 16 and is fed back to the PLC23, the PLC23 compares the oxygen concentration detected by the oxygen atmosphere instrument 16 with a preset atmosphere preset value, determines whether the oxygen concentration in the roller kiln meets the requirement according to a comparison result, and controls the opening of the first electric regulating valve and the gate valve when the oxygen concentration in the roller kiln does not meet the requirement, so that the oxygen concentration in the roller kiln is changed until the oxygen concentration in the roller kiln meets the requirement. Namely, the gas control device of the roller kiln realizes the purposes of automatically detecting the oxygen atmosphere and automatically adjusting the oxygen atmosphere, does not need manual operation, is beneficial to reducing the operation intensity, improves the response speed and ensures the quality of products.
As shown in connection with fig. 2, the oxygen atmosphere instrument 16 in the present application includes: an oil mist separator 161, loose cotton 162, activated carbon 163, color-changing silica gel 164, an oxygen separator 165, an oxygen atmosphere side point 14 and an electromagnetic valve 15.
The oxygen atmosphere side point 14 is a probe structure and is used for extending into the roller kiln, gas in the roller kiln enters the oxygen atmosphere instrument 16 through the electromagnetic valve 15 by the oxygen atmosphere side point 14, enters the oxygen analyzer 165 through the oil mist separator 161, the scattered cotton 162, the activated carbon 163 and the color-changing silica gel 164 in the oxygen atmosphere instrument 16, and obtains the oxygen atmosphere in the gas under the calculation of the oxygen analyzer 165, and then the gas is discharged from the oxygen analyzer 165.
It should be noted that, the above-mentioned solenoid valve 15 can control the on-off of the oxygen analyzer and the oxygen atmosphere side point 14, so as to realize that the oxygen analyzer can only work when the oxygen atmosphere needs to be obtained.
The oxygen analyzer 165 in the application is connected with the PLC23, data information of the oxygen atmosphere obtained by the oxygen analyzer 165 can be fed back to the PLC23, and the PLC23 determines whether the oxygen concentration in the roller kiln meets the requirement according to the obtained data information of the oxygen atmosphere.
When the oxygen atmosphere meets the requirement and the furnace pressure does not meet the requirement, the furnace pressure is adjusted mainly by oxygen intake without changing exhaust.
The gas control device of the roller kiln shown in fig. 1 further comprises: the gas tank 2, the first pipeline, the second electric regulating valve 26, the manual ball valve 28 and the bottom inlet air flow meter 24, and the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17.
Wherein a first pipe (not shown) communicates with the air reservoir 2 and the roller kiln, optionally with the bottom of the roller kiln.
The second electric control valve 26 is provided on the first pipe, and the second electric control valve 26 is connected to the PLC23, and the opening degree of the second electric control valve 26 is controlled by the PLC23, thereby adjusting the flow area of the first pipe.
The first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 are communicated with the PLC23, the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 respectively detect furnace pressure values at different positions of the driving side in the roller kiln, the detected furnace pressure values are fed back to the PLC23, the PLC23 compares the obtained furnace pressure values with preset furnace pressure values, and whether the furnace pressure values detected by the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 meet the preset furnace pressure values is determined according to comparison results. If the detected furnace pressure value does not meet the preset furnace pressure value, the PLC23 adjusts the opening degree of the second electric adjusting valve 26 until the detected furnace pressure value meets the preset furnace pressure value.
If the furnace pressure values detected by the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 are smaller than the preset furnace pressure value, the PLC23 controls the second electric regulating valve 26 to increase the opening degree of the second electric regulating valve 26 until the furnace pressure values detected by the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 meet the preset furnace pressure value.
If the furnace pressure values detected by the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 are both larger than the preset furnace pressure value, the PLC23 controls the second electric regulating valve 26 to reduce the opening degree of the second electric regulating valve 26 until the furnace pressure values detected by the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 meet the preset furnace pressure value.
It will be appreciated that the first and second pressure transmitters 9, 17 may also be other devices that can detect pressure, and thus, the first pressure transmitter 9 may be a first pressure detecting device and the second pressure transmitter 17 may be a second pressure detecting device.
The above-mentioned manual ball valve 28 allows manual control of the first duct, while the bottom inlet air flow meter 24 is provided to calculate the amount of air taken by the roller kiln.
The above is the overall control of the detection positions of the first and second furnace pressure transmitters 9 and 17, and the detection positions of the first and second furnace pressure transmitters 9 and 17 may be individually controlled.
Referring to fig. 1, the gas control device of the roller kiln further comprises: a passive side intake air 3, an active side intake air 13, a third electrically operated regulator valve 25 and a second conduit.
Wherein, second pipeline intercommunication gas holder 2 and roller kiln, third electric control valve 25 set up on the second pipeline to be connected with PLC23, the aperture of changing third electric control valve 25 through the control of PLC23 can change the flow area of second pipeline.
The passive side air intake 3 and the active side air intake 13 are communicated with the second pipeline, so that the passive side air intake 3, the active side air intake 13 and the second pipeline form a first branch, and the second furnace pressure transmitter 17 detects the pressure value at the active side air intake 13, wherein the pressure value is the furnace pressure value of one active side in the roller kiln.
In some embodiments, when the furnace pressure value detected by the second furnace pressure transmitter 17 does not meet the preset furnace pressure value, the PLC23 adjusts the opening of the third electric adjustment valve 25 until the furnace pressure values detected by the second furnace pressure transmitter 17 meet the preset furnace pressure value.
If the furnace pressure value detected by the second furnace pressure transmitter 17 is smaller than the preset furnace pressure value, the opening of the third electric control valve 25 is increased; if the furnace pressure value detected by the second furnace pressure transmitter 17 is greater than the preset furnace pressure value, the opening degree of the third electric control valve 25 is reduced.
A ball valve 4 and a flow meter 5 are also provided in the first branch, the arrangement and the function of the ball valve 4 and the flow meter 5 being referred to in the prior art.
In addition, the detection position of the first furnace pressure transmitter 9 can be independently controlled:
referring to fig. 1, the gas control device of the roller kiln further comprises: the device comprises a passive side heating rod lower air inlet 6, a passive side heating rod upper air inlet 7, a passive side transmission case air inlet 8, an active side transmission case air inlet 10, an active side heating rod upper air inlet 11, an active side heating rod lower air inlet 12, a fourth electric regulating valve 27 and a third pipeline.
Wherein, third pipeline intercommunication gas holder 2 and roller kiln, fourth electric control valve 27 set up on the third pipeline to be connected with PLC23, change the aperture of fourth electric control valve 27 through the control of PLC23, can change the flow area of third pipeline.
The driving side transmission case air inlet 10, the driving side heating rod upper air inlet 11 and the driving side heating rod lower air inlet 12 are communicated, so that a second branch is formed, namely, the pressures at three positions are equivalent. The first furnace pressure transmitter 9 detects the pressure value of the air inlet 12 under the heating rod at the active side, and the pressure value is the furnace pressure value at the other active side in the roller kiln. Thereby realizing that the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 respectively detect furnace pressure values of different driving sides in the roller kiln.
In some embodiments, when the furnace pressure value detected by the first furnace pressure transmitter 9 does not meet the preset furnace pressure value, the PLC23 adjusts the opening degree of the fourth electric adjusting valve 27 until the furnace pressure values detected by the first furnace pressure transmitter 9 meet the preset furnace pressure value.
If the furnace pressure value detected by the first furnace pressure transmitter 9 is smaller than the preset furnace pressure value, the opening of the fourth electric control valve 27 is increased; if the furnace pressure value detected by the first furnace pressure transmitter 9 is greater than the preset furnace pressure value, the opening degree of the fourth electric control valve 27 is reduced.
Of course, in the roller kiln working process, there will be a case that the first furnace pressure transmitter 9 detects that the furnace pressure value is smaller than the preset furnace pressure value, and the second furnace pressure transmitter 17 detects that the furnace pressure value is larger than the preset furnace pressure value, at this time, the PLC23 will adjust the opening degrees of the fourth electric adjusting valve 27 and the third electric adjusting valve 25 respectively until the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 detect that the furnace pressure values all meet the preset furnace pressure value.
If the preset furnace pressure values corresponding to the first furnace pressure transmitter 9 and the second furnace pressure transmitter 17 are different, in the judging process, the furnace pressure value detected by the first furnace pressure transmitter 9 needs to be compared with the preset furnace pressure value corresponding to the first furnace pressure transmitter 9, and the furnace pressure value detected by the second furnace pressure transmitter 17 needs to be compared with the preset furnace pressure value corresponding to the second furnace pressure transmitter 17.
The first pressure sensor 9 herein detects a first pressure value, and the second pressure sensor 17 detects a second pressure value.
The arrangement realizes independent control of the furnace pressures of different working sections in the roller kiln, namely, regional air inlet and air exhaust are realized, and the requirements of the furnace pressures and oxygen atmospheres of different working sections in the working process of the roller kiln are ensured.
The gas control device of the roller kiln further comprises a fifth electric control valve 1 and a gas tank pressure transmitter 29 connected to the gas tank 2.
The air storage tank pressure transmitter 29 is used for detecting the pressure value in the roller kiln, the air storage tank pressure transmitter 29 is connected with the PLC23, and the air storage tank pressure transmitter 29 feeds back the detected pressure value to the PLC23.
The volume of the air storage tank 2 is related to the air consumption per unit time of different working sections, and if the pressure value detected by the air storage tank pressure transmitter 29 is lower than the lower limit of the set value, the fifth electric regulating valve 1 is opened to supplement air to the air storage tank 2 until the pressure in the air storage tank 2 meets the preset requirement.
If the pressure value detected by the air tank pressure transmitter 29 is higher than the upper limit of the set value, the fifth electrically operated valve 1 is closed. The setting of the pressure of the air storage tank 2 is related to the pressure required by different working sections in the roller kiln and the pressure drop of the pipeline flow.
It should be noted that the air storage tank pressure transmitter 29 may be other pressure detecting devices capable of detecting pressure, and the PLC23 herein may be other types of controllers.
In the control process of the gas control device of the roller kiln, the oxygen atmosphere is firstly realized to meet the requirement, and then the furnace pressure is regulated.
The structure realizes that an independent oxygen atmosphere and furnace pressure automatic control system is arranged on the roller kiln partition.
In addition, the application also provides a roller kiln, which comprises a gas control device, wherein the gas control device is the gas control device disclosed in the embodiment, so that the roller kiln with the gas control device has all the technical effects, and the detailed description is omitted.
In some embodiments, the number of gas control devices is plural, so as to adjust the atmosphere and the pressure of different positions of the roller kiln.
As used in the specification and in the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The inclusion of an element defined by the phrase "comprising one … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises an element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (16)
1. A gas control device for a roller kiln, comprising:
the oxygen atmosphere instrument is used for detecting the oxygen concentration in the roller kiln;
the gate valve is arranged on an air inlet pipeline communicated with the air exhaust pipeline of the roller kiln and used for adjusting the wild air inlet quantity of the roller kiln;
the first electric regulating valve is arranged on the exhaust pipeline of the roller kiln;
and the controller is connected with the oxygen atmosphere instrument and the first electric regulating valve, and adjusts the opening of the gate valve and the opening of the first electric regulating valve according to the oxygen concentration detected by the oxygen atmosphere instrument until the oxygen concentration in the roller kiln meets the requirement.
2. The gas control device of the roller kiln according to claim 1, wherein the controller obtains the detected oxygen concentration of the oxygen atmosphere instrument, compares the detected oxygen concentration with an atmosphere preset value pre-stored in the controller, and adjusts the opening of the gate valve and the opening of the first electric regulating valve according to a comparison result until the oxygen concentration in the roller kiln meets the requirement.
3. A gas control device for a roller kiln according to claim 2, characterized in that if the detected oxygen concentration of the oxygen atmosphere meter is smaller than the atmosphere preset value, the controller increases the opening of the first electric control valve and decreases the opening of the gate valve until the oxygen concentration in the roller kiln meets the requirements.
4. A gas control device for a roller kiln according to claim 1, further comprising:
the exhaust fan is arranged on the exhaust pipeline and is used for exhausting the gas in the roller kiln;
the air pipeline pressure measuring transmitter is arranged on the exhaust pipeline and connected with the controller and used for adjusting the pressure of gas in the exhaust pipeline.
5. A gas control device for a roller kiln according to any of the claims 1-4, further comprising:
the air storage tank is communicated with a first pipeline, and the first pipeline is communicated with the roller kiln;
the second electric regulating valve is arranged on the first pipeline and is used for regulating the flow area of the first pipeline;
the first furnace pressure detection device and the second furnace pressure detection device are used for detecting furnace pressure values of different positions of the driving side in the roller kiln;
the first furnace pressure detection device, the second furnace pressure detection device and the second electric regulating valve are all connected with the controller, and the controller regulates the opening degree of the second electric regulating valve according to the furnace pressure value detected by the first furnace pressure detection device and the second furnace pressure detection device until the furnace pressure values detected by the first furnace pressure detection device and the second furnace pressure detection device all meet preset furnace pressure values.
6. A gas control device for a roller kiln according to claim 5, characterized in that,
the controller obtains a first pressure value detected by the first furnace pressure detection device and a second pressure value detected by the second furnace pressure detection device, compares the first pressure value and the second pressure value with the preset furnace pressure value respectively, and adjusts the opening of the second electric regulating valve according to a comparison result until the furnace pressure values detected by the first furnace pressure detection device and the second furnace pressure detection device meet the preset furnace pressure value.
7. A gas control device for a roller kiln according to claim 6, characterized in that the controller controls the second electric control valve to reduce the opening degree if both the first pressure value and the second pressure value are greater than the preset furnace pressure value;
and if the first pressure value and the second pressure value are smaller than the preset furnace pressure value, the controller controls the second electric regulating valve to increase the opening.
8. A gas control device for a roller kiln according to claim 5, further comprising:
one end of the second pipeline is communicated with the air storage tank, and the other end of the second pipeline is communicated with the passive side air inlet and the active side air inlet of the roller kiln; the second furnace pressure detection device is used for detecting a furnace pressure value of the air inlet of the active side;
the third electric regulating valve is arranged on the second pipeline and is used for regulating the flow area of the second pipeline;
and when the furnace pressure value detected by the first furnace pressure detection device acquired by the controller meets the requirement, the opening of the third electric regulating valve is regulated according to the furnace pressure value detected by the second furnace pressure detection device until the furnace pressure value detected by the second furnace pressure detection device meets the requirement.
9. A gas control device for a roller kiln according to claim 8, characterized in that,
the controller acquires a first pressure value detected by the first furnace pressure detection device and a second pressure value detected by the second furnace pressure detection device, and compares the first pressure value and the second pressure value with the preset furnace pressure value respectively;
and if the first pressure value meets the requirement and the second pressure value does not meet the requirement, the controller adjusts the opening of the third electric adjusting valve according to the comparison result of the second pressure value and the preset furnace pressure value until the furnace pressure value detected by the second furnace pressure detecting device meets the preset furnace pressure value.
10. A gas control device for a roller kiln according to claim 9, characterized in that the controller controls the third electric control valve to reduce the opening degree if the second pressure value is greater than the preset furnace pressure value;
and if the second pressure value is smaller than the preset furnace pressure value, the controller controls the third electric regulating valve to increase the opening degree.
11. A gas control device for a roller kiln according to claim 8, further comprising:
the first furnace pressure detection device detects the furnace pressure value of the second branch;
the fourth electric regulating valve is arranged on the third pipeline and is used for regulating the flow area of the third pipeline;
and when the furnace pressure value detected by the second furnace pressure detection device acquired by the controller meets the requirement, the opening of the fourth electric regulating valve is regulated according to the furnace pressure value detected by the first furnace pressure detection device until the furnace pressure value detected by the first furnace pressure detection device meets the requirement.
12. A gas control device for a roller kiln according to claim 11, characterized in that,
the controller acquires a first pressure value detected by the first furnace pressure detection device and a second pressure value detected by the second furnace pressure detection device, and compares the first pressure value and the second pressure value with the preset furnace pressure value respectively;
and if the second pressure value meets the requirement, and the first pressure value does not meet the requirement, the controller adjusts the opening of the fourth electric adjusting valve according to the comparison result of the first pressure value and the preset furnace pressure value until the furnace pressure value detected by the first furnace pressure detecting device meets the preset furnace pressure value.
13. A gas control device for a roller kiln according to claim 12, wherein the controller controls the fourth electric control valve to reduce the opening degree if the furnace pressure value detected by the first furnace pressure detecting means is greater than the preset furnace pressure value;
and if the furnace pressure value detected by the first furnace pressure detection device is smaller than the preset furnace pressure value, the controller controls the fourth electric regulating valve to increase the opening.
14. A gas control device for a roller kiln according to claim 11, characterized in that the controller before the first pressure value detected by the first pressure detection means and the second pressure value detected by the second pressure detection means are obtained, further comprises:
and determining that the oxygen concentration in the roller kiln meets the requirement.
15. A gas control device for a roller kiln according to claim 5, further comprising:
the air storage tank pressure detection device is used for detecting the pressure in the air storage tank and is connected with the controller;
the fifth electric regulating valve is used for regulating the on-off of the inlet of the air storage tank and is connected with the controller.
16. Roller kiln comprising a gas control device, characterized in that the gas control device is a gas control device according to any one of claims 1 to 15,
and the number of the gas control devices is plural.
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| CN202310575613.7A CN116294578B (en) | 2023-05-22 | 2023-05-22 | Roller kiln and gas control device thereof |
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| CN202310575613.7A CN116294578B (en) | 2023-05-22 | 2023-05-22 | Roller kiln and gas control device thereof |
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| CN116294578B (en) | 2023-08-08 |
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