CN211424463U - System for determining total air volume of boiler combustion system - Google Patents
System for determining total air volume of boiler combustion system Download PDFInfo
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- CN211424463U CN211424463U CN201922126028.0U CN201922126028U CN211424463U CN 211424463 U CN211424463 U CN 211424463U CN 201922126028 U CN201922126028 U CN 201922126028U CN 211424463 U CN211424463 U CN 211424463U
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Abstract
The utility model discloses a system for confirm total amount of wind of boiler combustion system, include: the centrifugal fan is communicated with the boiler system through an air pipe, a first air quantity sensor and a first proportional valve are arranged on the air pipe, the first air quantity sensor and the first proportional valve are both electrically connected with the main controller, and disturbance air quantity of the centrifugal fan is controlled through the main controller. The utility model discloses can realize the automatic of boiler intake and adjust, confirm the target value of the total amount of wind of boiler combustion system, guarantee the combustion efficiency of boiler.
Description
Technical Field
The utility model belongs to the technical field of boiler equipment, more specifically the system that relates to a confirm total amount of wind of boiler combustion system that says so.
Background
The traditional boiler burner is provided with forced air blowers, the forced air blowers are always in a high-speed running state under the same frequency, the air inlet volume is generally regulated and controlled through a mechanical air door arranged on an air inlet of the boiler, and the opening degree of the air door is regulated through a servo motor control link mechanism. The disadvantages are that: the control mode can not enable the fuel supply quantity and the air supply quantity to be accurately matched, so that the full combustion of the fuel can not be ensured, and the tail gas emission of the boiler is large in fluctuation and unstable. In order to ensure that combustion is more sufficient, an oxygen content signal is usually introduced to perform air supply adjustment in combustion control, but the oxygen content signal is greatly influenced by combustion fluctuation, oxygen content signals under different working conditions are completely different due to changes of coal types, the conditions of blockage, drifting and the like of an oxygen content measuring instrument can occur even after long-term operation, and the operation efficiency of a boiler cannot be quantized and accurately controlled.
Therefore, how to provide a system for determining the total air volume of a boiler combustion system is a problem which needs to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a confirm system of boiler combustion system total amount of wind can realize the automatic regulation of boiler intake, confirms the target value of boiler combustion system total amount of wind, has guaranteed the combustion efficiency of boiler.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a system for determining a total air flow for a boiler combustion system, comprising: the centrifugal fan is communicated with the boiler system through an air pipe, a first air quantity sensor and a first proportional valve are arranged on the air pipe, the first air quantity sensor and the first proportional valve are electrically connected with the main controller, and disturbance air quantity of the centrifugal fan is controlled by the main controller.
Preferably, the boiler system comprises a boiler body, a burner, a gas storage chamber, a fuel tank and a water storage tank, wherein the gas storage chamber and the fuel tank are both communicated with the burner, and the burner and the water storage tank are both connected with the boiler body.
Preferably, the boiler system further comprises a secondary controller, a second air volume sensor and a second proportional valve are arranged on an air pipe communicated with the gas storage chamber of the burner, a third fuel pump and a third proportional valve are arranged on a pipeline communicated with the fuel tank of the burner, and the second air volume sensor, the second proportional valve, the second fuel pump and the third proportional valve are all electrically connected with the secondary controller.
Preferably, the air storage chamber is communicated with an air compressor, a proportional valve IV is arranged on an air pipe of the air storage chamber communicated with the air compressor, a pressure sensor I is arranged in the air storage chamber, and the pressure sensor I and the proportional valve IV are both electrically connected with the auxiliary controller.
Preferably, the boiler system further comprises an auxiliary agent box, the auxiliary agent box is connected between the gas storage chamber and the combustor through a pipeline, and a sixth proportional valve is arranged on the pipeline.
Preferably, a water pump and a proportional valve V are arranged on a water pipe of the water storage tank communicated with the boiler body, and the water pump and the proportional valve V are electrically connected with the secondary controller.
The beneficial effects of the utility model reside in that:
the utility model quantifies the boiler efficiency, automatically matches the air supply volume according to the coal type, directly relates the air supply control with the boiler efficiency, can realize the automatic adjustment of the boiler air supply volume, determines the target value of the total air volume of the boiler combustion system, and ensures the combustion efficiency of the boiler; the utility model has strong adaptability, can automatically adapt to the change of coal types, can automatically identify when the coal types change, automatically start automatic optimization, search the optimal ratio of wind coal, and ensure the boiler efficiency; the utility model discloses the reliability is high, avoids conventional control, does not adopt the oxygen volume signal to carry out closed loop control, but uses boiler efficiency for seeking the optimal object, automatic seeking wind coal ratio, and then the total amount of wind of control for the anomaly and the stub of oxygen volume signal do not all influence the automatic control quality of burning.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a block diagram of the present invention.
Fig. 2 is a block diagram of a boiler system according to the present invention.
Wherein, in the figure,
1-a boiler system; 2-a main controller; 3-a centrifugal fan; 4-a first air quantity sensor; 5-a proportional valve I; 6-boiler body; 7-a burner; 8-an air storage chamber; 9-a fuel tank; 10-a secondary controller; 11-a second air volume sensor; 12-proportional valve two; 13-a fuel pump; 14-proportional valve three; 15-an air compressor; 16-proportional valve four; 17-an auxiliary agent box; 18-proportional valve six; 19-a water pump; 20-proportional valve five; 21-a water storage tank; 22-pressure sensor one.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a system for determining total air volume of a boiler combustion system, comprising: boiler system 1, main control unit 2 and centrifugal fan 3, centrifugal fan 3 is linked together through tuber pipe and boiler system 1, is provided with an air sensor 4 and proportional valve 5 on the tuber pipe, and air sensor 4 and proportional valve 5 all with main control unit 2 electric connection, the disturbance amount of wind through main control unit 2 control centrifugal fan 3. The utility model discloses quantify boiler efficiency, centrifugal fan 3's intake data transmission to main control unit 2 is monitored to air sensor 4, and the size of opening of main control unit 2 control proportional valve 5 matches the air supply volume automatically for air supply control and boiler efficiency direct association can realize the automatic regulation of boiler intake, realize the adjustment of disturbance amount of wind, have guaranteed the combustion efficiency of boiler.
In another embodiment, the boiler system 1 comprises a boiler body 6, a burner 7, an air reservoir 8, a fuel tank 9 and a water storage tank 21, wherein the air reservoir 8 and the fuel tank 9 are both communicated with the burner 7, and the burner 7 and the water storage tank 21 are both connected with the boiler body 6. The air storage chamber 8 is used for providing oxygen to the burner 7, the fuel tank 9 is used for providing coal fuel to the burner 7, and the water storage tank 21 is used for providing water source to the interior of the boiler body 6; a temperature sensor and a second pressure sensor are arranged in the boiler body 6, and the temperature sensor and the second pressure sensor are both electrically connected with the sub-controller 10.
In another embodiment, the boiler system 1 further comprises a sub-controller 10, a second air volume sensor 11 and a second proportional valve 12 are arranged on an air pipe of the burner 7 communicated with the air storage chamber 8, a fuel pump 13 and a third proportional valve 14 are arranged on a pipeline of the burner 7 communicated with the fuel tank 9, and the second air volume sensor 11, the second proportional valve 12, the fuel pump 13 and the third proportional valve 14 are all electrically connected with the sub-controller 10. The second air volume sensor 11 monitors air volume data entering the combustor 7 from the air storage chamber 8, the data are transmitted to the secondary controller 10, the secondary controller 10 controls the opening size of the second proportional valve 12, the air intake volume of the combustor 7 is adjusted timely, the third proportional valve 14 is controlled, and the fuel intake volume is adjusted.
In another embodiment, the air storage chamber 8 is communicated with an air compressor 15, a proportional valve four 16 is arranged on an air pipe of the air storage chamber 8 communicated with the air compressor 15, a pressure sensor one 22 is arranged in the air storage chamber 8, and the pressure sensor one 22 and the proportional valve four 16 are both electrically connected with the sub-controller 10. The air compressor 15 stores high-pressure gas in the gas storage chamber 8 for standby.
In another embodiment, the boiler system 1 further comprises an auxiliary agent tank 17, the auxiliary agent tank 17 is connected between the air storage chamber 8 and the burner 7 through a pipeline, and a proportional valve six 18 is arranged on the pipeline. The arrangement of the auxiliary agent tank 17 is beneficial to improving the combustion efficiency of the fuel.
In another embodiment, a water pump 19 and a proportional valve five 20 are arranged on a water pipe of the water storage tank 21 communicated with the boiler body 6, and the water pump 19 and the proportional valve five 20 are both electrically connected with the sub-controller 10. The sub-controller 10 controls the opening size of the five proportional valves 20 to adjust the water quantity entering the boiler body 6.
The utility model also provides a method for determining the total air quantity of the boiler combustion system, which obtains the boiler combustion efficiency value of the boiler system through the main controller;
acquiring an initial value of an air-coal ratio of a current boiler combustion system through a secondary controller, wherein the initial value of the air-coal ratio is a ratio of the initial value of a total air quantity to the total fuel quantity;
acquiring an oxygen quantity input value of a current boiler system through a secondary controller;
acquiring an oxygen quantity preset value of a current boiler system through a secondary controller, wherein the oxygen quantity preset value is automatically given by a function of boiler load;
determining the disturbance direction of the disturbance air volume of the centrifugal fan according to the relation between the oxygen volume input value and the oxygen volume preset value, wherein the disturbance direction represents the increase or decrease of the disturbance air volume;
gradually changing disturbance air volume according to the disturbance direction until the maximum value of the boiler combustion efficiency of the boiler system is reached;
acquiring an optimal oxygen amount value according to the maximum value of the combustion efficiency of the boiler;
acquiring an optimal value of the air-coal ratio according to the optimal value of the oxygen amount;
and calculating the product of the optimal value of the air-coal ratio and the total coal quantity to obtain a target value of the total air quantity.
In another embodiment, the obtaining, by the main controller, the boiler combustion efficiency input value of the current boiler combustion system specifically includes:
acquiring input energy of a boiler combustion system;
acquiring output energy of a boiler combustion system;
and acquiring a boiler combustion efficiency input value of the boiler combustion system through the ratio of the output energy to the input energy.
In another embodiment, the determining the disturbance direction of the disturbance air volume according to the relationship between the oxygen volume input value and the oxygen volume preset value specifically includes:
judging whether the oxygen quantity input value is higher than a preset oxygen quantity value;
when the oxygen volume input value is higher than the oxygen volume preset value, determining the initial direction of the disturbance direction as a decreasing direction;
when the oxygen volume input value is lower than the oxygen volume preset value, determining the initial direction of the disturbance direction as an increasing direction;
increasing or decreasing the disturbance air volume according to the step length set value of the disturbance air volume and the initial direction of the disturbance direction;
when the set value is reached, judging whether the input value of the combustion efficiency of the boiler is increased or not;
if so, determining that the initial direction of the disturbed air volume is correct, and ensuring that the disturbed direction is the same as the initial direction of the disturbed direction;
if not, determining that the initial direction of the disturbed air volume is wrong, and enabling the disturbed direction to be opposite to the initial direction of the disturbed direction.
In another embodiment, when the initial direction of the disturbed air volume is an increasing direction, gradually changing the disturbed air volume according to the disturbing direction until reaching the maximum value of the boiler combustion efficiency of the boiler system specifically includes:
increasing disturbance air quantity according to the step length set value, and acquiring the combustion efficiency value of the boiler system according to the step time set value until the maximum value of the boiler combustion efficiency of the boiler system is reached;
when the initial direction of the disturbance air volume is the direction of reduction, gradually changing the disturbance air volume according to the disturbance direction until the maximum value of the boiler combustion efficiency of the boiler system is reached specifically comprises:
and reducing the disturbance air quantity according to the step length set value, and acquiring the combustion efficiency value of the boiler system according to the step time set value until the maximum value of the boiler combustion efficiency of the boiler system is reached.
The utility model discloses at first acquire current boiler combustion system's boiler combustion efficiency input value and wind coal ratio initial value, confirm the disturbance direction of the disturbance amount of wind according to the relation of oxygen volume input value and oxygen volume default, change the disturbance amount of wind gradually after the disturbance direction of the disturbance amount of wind of waiting to confirm, until reaching boiler combustion system's boiler combustion efficiency maximum. The optimal oxygen amount value is obtained through the maximum value of the boiler combustion efficiency, the optimal air-coal ratio value is obtained, the product of the optimal air-coal ratio value and the total coal material amount is calculated, and therefore the total air volume target value is obtained, the boiler combustion system is enabled to operate according to the optimized total air volume target value, and the boiler combustion efficiency is improved. The utility model has strong adaptability, can automatically adapt to the change of coal types, can automatically identify when the coal types change, automatically start automatic optimization, search the optimal ratio of wind coal, and ensure the boiler efficiency; the utility model discloses the reliability is high, avoids conventional control, does not adopt the oxygen volume signal to carry out closed loop control, but uses boiler efficiency for seeking the optimal object, automatic seeking wind coal ratio, and then the total amount of wind of control for the anomaly and the stub of oxygen volume signal do not all influence the automatic control quality of burning.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
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 (6)
1. A system for determining a total air flow for a boiler combustion system, comprising: the centrifugal fan is communicated with the boiler system through an air pipe, a first air quantity sensor and a first proportional valve are arranged on the air pipe, the first air quantity sensor and the first proportional valve are electrically connected with the main controller, and disturbance air quantity of the centrifugal fan is controlled by the main controller.
2. The system for determining the total air volume of a boiler combustion system as claimed in claim 1, wherein the boiler system comprises a boiler body, a burner, an air reservoir, a fuel tank and a water storage tank, wherein the air reservoir and the fuel tank are both in communication with the burner, and the burner and the water storage tank are both connected with the boiler body.
3. The system for determining the total air volume of a boiler combustion system according to claim 2, wherein the boiler system further comprises a secondary controller, an air pipe for communicating the burner with the air storage chamber is provided with a second air volume sensor and a second proportional valve, a pipeline for communicating the burner with the fuel tank is provided with a third fuel pump and a third proportional valve, and the second air volume sensor, the second proportional valve, the second fuel pump and the third proportional valve are all electrically connected with the secondary controller.
4. The system for determining the total air volume of a boiler combustion system as claimed in claim 3, wherein the air storage chamber is communicated with an air compressor, an air pipe of the air storage chamber communicated with the air compressor is provided with a fourth proportional valve, a first pressure sensor is arranged in the air storage chamber, and both the first pressure sensor and the fourth proportional valve are electrically connected with the secondary controller.
5. The system for determining the total air volume of a boiler combustion system according to claim 3, wherein the boiler system further comprises an auxiliary agent box, the auxiliary agent box is connected between the air storage chamber and the burner through a pipeline, and a sixth proportional valve is arranged on the pipeline.
6. The system for determining the total air volume of the boiler combustion system according to claim 3, wherein a water pump and a proportional valve V are arranged on a water pipe of the water storage tank communicated with the boiler body, and the water pump and the proportional valve V are both electrically connected with the secondary controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922126028.0U CN211424463U (en) | 2019-12-02 | 2019-12-02 | System for determining total air volume of boiler combustion system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922126028.0U CN211424463U (en) | 2019-12-02 | 2019-12-02 | System for determining total air volume of boiler combustion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822471A (en) * | 2019-12-02 | 2020-02-21 | 国惠环保新能源有限公司 | System and method for determining total air volume of boiler combustion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822471A (en) * | 2019-12-02 | 2020-02-21 | 国惠环保新能源有限公司 | System and method for determining total air volume of boiler combustion system |
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