CN218567913U - Automatic temperature regulating system of compressed air method calcining furnace - Google Patents
Automatic temperature regulating system of compressed air method calcining furnace Download PDFInfo
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- CN218567913U CN218567913U CN202120397416.7U CN202120397416U CN218567913U CN 218567913 U CN218567913 U CN 218567913U CN 202120397416 U CN202120397416 U CN 202120397416U CN 218567913 U CN218567913 U CN 218567913U
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Abstract
The utility model discloses an automatic temperature regulating system of a compressed air method calcining furnace, which comprises a furnace body, a temperature measuring component, a temperature control system and an air inlet component, wherein a plurality of layers of fire paths which are sequentially communicated are formed on the furnace body from top to bottom; the inlet of the first layer of flame path is communicated with the volatile component pipeline, and the communicated part is provided with an air door, the temperature measuring component comprises an upper temperature measuring element and a lower temperature measuring element, wherein the upper temperature measuring element is arranged at one side of the second layer of flame path and used for detecting the temperature of the second layer of flame path, and the lower temperature measuring element is arranged at one side of the bottommost flame path and used for detecting the temperature of the bottommost flame path; the outlet of the fire channel at the bottommost layer is communicated with a discharge flue; the temperature control system comprises a master control box and a group control box, temperature signals of the two-layer flame paths and the bottommost flame path are collected simultaneously, the two signals jointly control the temperature adjusting system, and the temperature of the two-layer flame paths is mainly adjusted on the basis that the temperature of the bottommost flame path does not exceed the standard, so that the system is more stable and reliable in operation.
Description
Technical Field
The utility model belongs to the technical field of burning furnace flame path accuse temperature, concretely relates to burning furnace automatic temperature regulating system is forged to compressed air method.
Background
The existing automatic temperature regulating system of the calcining furnace has an obvious defect that the temperature of only two layers of flame paths can not be controlled, and the temperature of the bottommost flame path can not be taken into consideration. It is true that the temperature of the two-layer flame path and the temperature of the bottommost flame path have a certain correlation, and generally, the temperature of the two layers is high, the temperature of the bottommost flame path is also high, the temperature of the two layers is low, and the temperature of the bottommost flame path is also low. However, there are exceptional cases that the temperature of the two-layer flame path is not high, and the temperature of the bottommost layer exceeds the standard, so that the phenomenon is caused by various reasons as follows: 1. the volatile components in the upper flame path are not fully combusted until the volatile components in the lower flame path are combusted; 2. the gas is communicated between the lower flame path and the charging bucket, and the combustible gas directly flees from the charging bucket to the flame path and the like. The extremely high harm of bottommost flame path temperature can cause the material jar to burn, and the stove is scrapped. Therefore, the extremely high temperature of the lowest fire channel is a non-negligible problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that exists on the above-mentioned prior art, provide a burning furnace automatic temperature regulating system is forged to compressed air method, this device is through improving the completion back, and the temperature signal of two layers and bottom flame path is gathered simultaneously to the temperature regulating system, and two signal joint control temperature regulating system ensure eight layers flame path temperature not exceed standard on the basis, the two layers flame path temperature of main accent to make the more reliable and more stable of system operation.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an automatic temperature regulating system of a compressed air method calcining furnace comprises a furnace body, a temperature measuring component, a temperature control system and an air inlet component, wherein a plurality of layers of fire paths which are sequentially communicated are formed in the furnace body from top to bottom; the inlet of the first layer of flame path is communicated with the volatile component pipeline, and the communicated part is provided with an air door, the temperature measuring component comprises an upper temperature measuring element and a lower temperature measuring element, wherein the upper temperature measuring element is arranged at one side of the second layer of flame path and used for detecting the temperature of the second layer of flame path, and the lower temperature measuring element is arranged at one side of the bottommost flame path and used for detecting the temperature of the bottommost flame path; the outlet of the fire channel at the bottommost layer is communicated with a discharge flue; the temperature control system comprises a master control box and a group control box, wherein the temperature measurement assembly is in signal connection with the master control box and is used for transmitting measured temperature data to the master control box, the master control box transmits control instructions to the group control boxes according to set values, and the group control boxes adjust the opening degree of the air inlet assembly through transmitting the control instructions, so that the adjustment of air inlet amount is realized.
According to the scheme, the air inlet assembly comprises an air bag pipe and a branch analog quantity valve, a plurality of branch pipelines extending into the air door are distributed on the air bag pipe side by side, each branch pipeline comprises a first branch pipe and a second branch pipe which are communicated in a butt joint mode, the first end of each first branch pipe is communicated with the air bag pipe, the branch analog quantity valve is installed on each first branch pipe, each second branch pipe is connected with the second end of each first branch pipe through a connecting piece, and a spray head is arranged at the tail end of each second branch pipe.
In a further improved scheme, the second branch pipe is of an L-shaped structure.
According to the scheme, the air inlet of the air bag pipe is communicated with a total analog valve, and the total analog valve is in signal connection with the group control box and used for automatically adjusting the total air inflow in the air bag pipe.
According to the scheme, the total analog valve is communicated with the compressed air main pipe through a manual pressure regulating valve.
Further improve this scheme, be provided with manual push-and-pull board in air door department.
According to the scheme, the air inflow of the air inlet assembly is controlled by the master control box through the acquired temperature of the two-layer flame path and the acquired temperature of the bottommost flame path.
According to the scheme, the master control box is connected with the temperature measuring element through the communication line and used for routing inspection and temperature measurement of the two-layer flame paths and the bottommost flame path.
According to the scheme, the total control box obtains the average temperature of the two layers of flame paths through each group of temperature measuring assemblies to control the opening degree of the total analog quantity valve.
Advantageous effects
1. The utility model discloses an improve, compressed air sends into the compressed air house steward through the pipeline, and the rethread compressed air house steward distributes to every group pipeline, then gets into manual air-vent valve, and a fixed pressure value can be transferred in advance to manual air-vent valve according to this group average temperature's height. Compressed air enters a main analog valve after passing through a pressure regulating valve, the main analog valve needs to be preset with an initial opening amount, and then the opening amount of the valve can be increased or decreased according to the average temperature of the group by an automatic control system. The total analog valve is controlled by the average temperature parameters of each group of the two-layer flame paths and is automatically adjusted by an automatic control system.
2. The utility model discloses, compressed air gets into thick tubular gas bag pipe after through total analog quantity valve, and the purpose that sets up thick tubular gas bag pipe makes the intake pipe pressure equilibrium of four flame paths. Compressed air enters a sub-analog valve of each flame path through the air bag, the sub-analog valve also has a preset opening, the opening degree of the sub-analog valve is related to the temperature of the two-layer flame path and the bottommost flame path, and the opening degree of the valve is opened by a control signal sent by a control circuit connected with the group control box, so that the compressed air is controlled to adjust the air inflow, and the aim of adjusting the temperature is fulfilled. The two signals jointly control the temperature adjusting system to ensure that the temperature of the two-layer flame path is adjusted mainly on the basis of ensuring that the temperature of the bottommost layer is not too high.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, 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 only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a structural view of a furnace body of the present invention;
figure 2 is the structure diagram of the air inlet component of the utility model
FIG. 3 is a structural diagram of the middle air door of the present invention;
FIG. 4 is a schematic block diagram of the temperature control system of the present invention;
FIG. 5 is a graph of the temperature profile of the present invention;
the labels in the figure are: 1. the device comprises a furnace body, 1-1 part of a first-layer flame path, 1-2 parts of a second-layer flame path, 1-3 parts of a volatile component pipeline, 1-4 parts of a throttle, 141 parts of a manual push-pull plate, 1-5 parts of an eight-layer flame path, 1-6 parts of a smoke path, 2 parts of an upper-layer temperature measuring element, 3 parts of a lower-layer temperature measuring element, 4 parts of a master control box, 5 parts of a group control box, 6 parts of an air bag pipe, 7 parts of a branch analog valve, 8 parts of a branch pipeline, 8-1 parts of a first branch pipe, 8-2 parts of a second branch pipe, 8-3 parts of a connecting piece, 8-4 parts of a spray head, 9 parts of a master analog valve, 10 parts of a manual pressure regulating valve, 11 parts of a compressed air main pipe, 12 parts of a gas source.
Detailed Description
In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
As shown in the figure: in the embodiment, a calciner with 8 flame paths is used for detailed description, and an automatic temperature regulating system of a compressed air method calciner comprises a calciner body 1, a temperature measuring component, a temperature control system and an air inlet component, wherein eight flame paths 1-5 which are sequentially communicated are formed in the calciner body 1 from top to bottom; the inlet of the first layer flame path 1-1 is communicated with the volatile component pipeline 1-3, an air door 1-4 is arranged at the communicated position, and a manual push-pull plate 141 is arranged at the air door 1-4. The temperature measuring component comprises an upper-layer temperature measuring element 2 and a lower-layer temperature measuring element 3, wherein the upper-layer temperature measuring element 2 is arranged on one side of the two-layer flame path 1-2 and used for detecting the temperature of the two-layer flame path 1-2, and the lower-layer temperature measuring element 3 is arranged on one side of the eight-layer flame path 1-5 and used for detecting the temperature of the eight-layer flame path 1-5; the outlets of the eight-layer flame paths 1-5 are communicated with discharge paths 1-6, the temperature control system comprises a master control box 4 and group control boxes 5, the temperature measuring component is in signal connection with the master control box 4 and is used for transmitting measured temperature data to the master control box 4, the master control box 4 transmits control instructions to the group control boxes 5 according to set values, and the group control boxes 5 adjust the air inflow of the opening degree of the air inlet component by transmitting the control instructions. In the automatic temperature regulation process, a thought of manual temperature regulation is adopted, and if the temperatures of the two-layer flame path 1-2 and the eight-layer flame path 1-5 cannot be considered, the temperature of the eight layers is guaranteed not to exceed the standard.
The air inlet assembly comprises an air bag pipe 6 and a branch analog quantity valve 7, a plurality of branch pipes 8 extending into air doors 1-4 are distributed on the air bag pipe 6 side by side, each branch pipe 8 comprises a first branch pipe 8-1 and a second branch pipe 8-2 which are communicated in a butt joint mode, the first end of each first branch pipe 8-1 is communicated with the air bag pipe 6, the branch analog quantity valve 7 is installed on each first branch pipe 8-1, each second branch pipe 8-2 is connected with the second end of each first branch pipe 8-1 through a connecting piece 8-3, each connecting piece 8-3 adopts a straight pipe loose joint, and the tail end of each second branch pipe 8-2 is provided with a spray head 8-4. The second branch pipe 8-2 is of an L-shaped structure. And an air inlet of the air bag pipe 6 is communicated with a total analog valve 9, and the total analog valve 9 is in signal connection with the group control box 5 and is used for automatically adjusting the total air inflow of the air bag pipe 6. The total analog quantity valve 9 is communicated with a compressed air main pipe 11 through a manual pressure regulating valve 10.
In the scheme, the furnace body 1 of the calcining furnace can be of an 8-10-layer flame path structure, when the structure is a 9-layer flame path structure, nine flame paths are the lowest flame paths, when the structure is a 10-layer flame path structure, ten flame paths are the lowest flame paths, and the temperature control principle of the calcining furnace with the nine flame paths and the ten flame paths is the same as or similar to that of the calcining furnace with the 8-layer flame paths, and the details are not repeated here.
In this scheme, all temperature elements establish ties with a three heart yearn, insert total control box 4, give the PLC of total control box 4 data through 485 communication module. The master control box 4 transmits an output instruction to each group control box 5, each group control box 5 controls four sub-analog quantity valves 7, the air inlet regulating quantity of each flame path is controlled by the opening percentage of the sub-analog quantity valves, and each group master analog quantity valve 9 controls the total air inlet quantity of each group. Preferably each group control box 5 only assumes the function of a junction box, the master control box 4 being the actual control center for all valves. Each group control box 5 controls four component analog quantity valves 7 and a total analog quantity valve 9, and each component analog quantity valve 7 adjusts and controls according to feedback signals of two-layer and eight-layer temperature measuring elements corresponding to the component analog quantity valve 7.
Compressed air of an air source 12 is sent into a compressed air main pipe 11 through a pipeline, then is distributed to each group of branch pipelines 8 of the compressed air through the compressed air main pipe 11, and then enters a manual pressure regulating valve 10, and the manual pressure regulating valve 10 can be used for regulating a fixed pressure value in advance according to the average temperature of the group. Compressed air enters the total analog valve 9 after passing through the manual pressure regulating valve 10, the total analog valve 9 needs to be preset with an initial opening amount, for example, the initial opening amount is preset to be 50%, and then the opening amount of the valve can be increased or decreased according to the average temperature of the group by an automatic control system. The total analog valve 9 is controlled by the average temperature parameters of all groups and automatically regulated by an automatic control system. After passing through the total analog quantity valve 9, compressed air enters a thick pipe type air bag pipe 6, and the purpose of arranging the thick pipe type air bag pipe 6 is to balance the pressure of the air inlet pipes of the four flame paths, so that the difference is not large. Compressed air enters a sub-analog valve 7 of each flame path through an air bag pipe 6, the sub-analog valve 7 also has a preset opening, the opening degree of the sub-analog valve is related to the temperature of the second-layer flame path 1-2 and the eighth-layer flame path 1-5, the opening degree of the valve is controlled by a control signal sent by a control circuit connected with the group control box 5, and then the compressed air is controlled to adjust the air inflow, so that the aim of temperature adjustment is achieved.
The gas in the gas bag pipe 6 enters the sub-analog quantity valve 7 through the branch pipe 8, and a movable joint is additionally arranged on the branch pipe 8 so as to be convenient to disassemble. Then enters the air door 1-4 through a bent pipe and is connected with a shower type spray head 8-4. The spray heads 8-4 make the compressed air entering the flame path more uniform and soft, and are convenient for mixed combustion with volatile components. The air doors 1-4 are also provided with the sliding doors as auxiliary air inlet, the compressed air consumption can be greatly saved by keeping the auxiliary air inlet of the sliding doors, and the automatic temperature adjusting system has the advantage that the temperature can still be manually adjusted by using the sliding air doors 1-4 after the automatic temperature adjusting system is closed.
In actual operation, the temperature control of the pot calciner is a difficult problem because the amount of volatile components is uncontrollable, air sources are diversified, such as preheated air and cold air entering from a temperature-adjusting air door, and the fire observation opening and the cracks of the furnace body 1 may also leak air. The volatile components of the corresponding flame paths between each group can be communicated with each other, which brings great difficulty to temperature adjustment. The air entering the furnace body 1 may be a combustion improver or a coolant. This makes the thermostat system more difficult to handle.
In the scheme, as shown in the figure, for the pot-type calcining furnace with 8 layers of flame paths in total, the upper-layer temperature measuring element 2 is placed at the 1-2 part of the two layers of flame paths, the lower-layer temperature measuring element 3 is placed at the 1-5 part of the eight layers of flame paths, and the temperature adjusting air door is placed at the first layer. The volatile component enters the initial end of the first-layer flame path 1-1 from the volatile component pipeline 1-3 through the lower flame port, and the compressed air enters the initial end of the first-layer flame path 1-1 from the air door 1-4 through the sub-analog quantity valve 7 and is sprayed into the flame path through the spray head 8-4. The volatile components and air begin to contact and mix with each other to burn in the first flame path 1-1. The high-temperature gas after burning flows to the lower flame path under the pulling of the total negative pressure fan, and finally enters the discharge flue 1-6 to be discharged. That is, the temperature of the upper layer of temperature measuring element 2 and the temperature of the lower layer of temperature measuring element 3 control the analog dividing valve 7 together to realize automatic temperature adjustment.
The temperature regulating curve of the pot calciner is shown in the figure. As can be seen from the figure, the temperature curve chart of the pot calciner can be divided into an warming zone, a transition zone and a cooling zone. The temperature rise is obvious when the air quantity is increased in the temperature rising region, the temperature change is not large when the air quantity is increased in the transition region, and the air quantity at the increasing point is possible to be temperature rise or temperature drop due to disturbance of a combustion system. In the cooling zone, the cooling by increasing the inlet amount of cold air is obvious, so that for an external cold air type cooling automatic temperature regulating system, a combustion system of a calcining furnace is stabilized in the cooling zone, and for automatic temperature regulation, the operation is easier. And for the change of the production condition, the temperature curve of the calcining furnace can shift left and right, the change of the curve is followed by the change of the minimum air inflow of the branch analogue quantity valve 7, and the change of the total analogue quantity valve 9 is matched with the change of the branch analogue quantity valve 7.
The initial state of the temperature regulating system needs preset temperature parameters, including a target temperature T of the two-layer flame path 1-2, a temperature variable h of the two-layer flame path 1-2, a minimum opening amount s% of the sub-analog valve 7, a correction amount m% of each adjustment of the minimum opening amount of the sub-analog valve 7, a minimum variation amount n% of each time of the sub-analog valve 7, an initial opening amount q% of the total analog valve 9, and a variation amount P% of the total analog valve 9. In the temperature regulation process, not only the compressed air quantity needs to be regulated, but also the temperature control area of the calcining furnace needs to be judged. Because the combustion system of the calcining furnace is a simple heating process or a simple cooling process along with the increase of the added compressed air, the possibility of heating and cooling exists, and the difficulty is increased for the design of an automatic temperature regulating system. Therefore, we add a status judgment to the system to determine whether the valve opening is increasing or decreasing.
The temperature control principle of the system is as follows: judging whether the temperature of the two-layer flame path is within a range value; when the temperature of the two-layer flame path is higher than the set range, firstly increasing the opening amount of the sub-analog quantity valve 7, simultaneously carrying out temperature increase and decrease judgment, judging the temperature of the eight-layer flame path if the temperature is decreased by comparing with the last temperature measurement data, increasing the preset opening amount of the sub-analog quantity valve 7 if the temperature is increased or kept constant by comparing with the last temperature measurement data, and then judging the temperature of the eight-layer flame path; if the temperature of the eight-layer flame path is higher than the warning value, the opening degree of the sub-analog quantity valve 7 is increased.
According to 4 air inlet components connected and arranged on the air bag pipe 6, if the average temperature measured by the temperature measuring components corresponding to the 4 groups of air inlet components is lower than or higher than a set value, the total analog valve 9 is adjusted according to the temperature value, if the average temperature is lower than the set value, the opening degree of the total analog valve 9 is reduced, and if the average temperature is higher than the set value, the opening degree of the total analog valve 9 is increased.
The master control box 4 outputs the measured temperature real-time parameter list, is connected to a computer and displays the temperature on the computer. The real-time two-layer flame path temperature and eight-layer flame path temperature of each flame path are displayed on the table. The too low or too high temperature value is respectively displayed by different colors, and the negative pressure value of each flame path can also be displayed in the table.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change or modification made to the above embodiments according to the technical essence of the present invention will still fall within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a compressed air method calcining furnace automatic temperature regulating system, includes furnace body (1), temperature measurement subassembly, temperature control system and subassembly that admits air, its characterized in that: the furnace body (1) is provided with a plurality of layers of fire paths which are sequentially communicated from top to bottom; the inlet of the first layer of flame path (1-1) is communicated with the volatile component pipeline (1-3), and the communicated part is provided with an air door (1-4), the temperature measuring component comprises an upper layer of temperature measuring element (2) and a lower layer of temperature measuring element (3), wherein the upper layer of temperature measuring element (2) is arranged at one side of the second layer of flame path (1-2) and is used for detecting the temperature of the second layer of flame path (1-2), and the lower layer of temperature measuring element (3) is arranged at one side of the bottommost flame path (1-5) and is used for detecting the temperature of the bottommost flame path (1-5); the outlet of the bottommost flame path (1-5) is communicated with a discharge flue (1-6);
the temperature control system comprises a master control box (4) and a group control box (5), the temperature measurement assembly is in signal connection with the master control box (4) and used for transmitting measured temperature data to the master control box (4), the master control box (4) transmits control instructions to the group control boxes (5) according to set values, and the group control box (5) adjusts the opening degree of the air inlet assembly through transmitting the control instructions, so that the adjustment of air inlet amount is realized.
2. The compressed air calciner automatic temperature regulation system according to claim 1, characterized in that: the air inlet assembly comprises an air bag pipe (6) and a branch analog quantity valve (7), a plurality of branch pipes (8) extending into an air door (1-4) are distributed on the air bag pipe (6) side by side, each branch pipe (8) comprises a first branch pipe (8-1) and a second branch pipe (8-2) which are communicated in a butt joint mode, the first end of each first branch pipe (8-1) is communicated with the air bag pipe (6), the branch analog quantity valve (7) is installed on each first branch pipe (8-1), each second branch pipe (8-2) is connected with the second end of each first branch pipe (8-1) through a connecting piece (8-3), and a spray head (8-4) is arranged at the tail end of each second branch pipe (8-2).
3. The compressed air calciner automatic temperature regulation system of claim 2, wherein: the second branch pipe (8-2) is of an L-shaped structure.
4. The compressed air calciner automatic temperature regulation system according to claim 2, characterized in that: and an air inlet of the air bag pipe (6) is communicated with a total analog valve (9), and the total analog valve (9) is in signal connection with the group control box (5) and is used for automatically adjusting the total air inflow in the air bag pipe (6).
5. The compressed air calciner automatic temperature regulation system according to claim 4, characterized in that: the total analog valve (9) is communicated with a compressed air main pipe (11) through a manual pressure regulating valve (10).
6. The compressed air calciner automatic temperature regulation system according to claim 1, characterized in that: a manual push-pull plate is arranged at the air door (1-4).
7. The compressed air calciner automatic temperature regulation system according to claim 1, characterized in that: the master control box (4) controls the air inflow of the air inlet assembly through the acquired temperature of the two-layer flame paths (1-2) and the acquired temperature of the bottommost flame path (1-5).
8. The compressed air calciner automatic temperature regulation system according to claim 1, characterized in that: the master control box (4) is connected with the temperature measuring element through a communication line and is used for routing inspection and temperature measurement of the two-layer flame paths (1-2) and the bottommost flame path (1-5).
9. The compressed air calciner automatic temperature regulation system according to claim 1, characterized in that: the master control box (4) acquires the average temperature of the two layers of flame paths (1-2) through each group of temperature measurement components to control the opening degree of the master analog valve (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120397416.7U CN218567913U (en) | 2021-02-23 | 2021-02-23 | Automatic temperature regulating system of compressed air method calcining furnace |
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| CN202120397416.7U CN218567913U (en) | 2021-02-23 | 2021-02-23 | Automatic temperature regulating system of compressed air method calcining furnace |
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