CN110986086A - Combustion control system - Google Patents
Combustion control system Download PDFInfo
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- CN110986086A CN110986086A CN201911292535.XA CN201911292535A CN110986086A CN 110986086 A CN110986086 A CN 110986086A CN 201911292535 A CN201911292535 A CN 201911292535A CN 110986086 A CN110986086 A CN 110986086A
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- combustion
- combustion chamber
- regulating valve
- flowmeter
- control device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention provides a combustion control system, which comprises a controllable combustion gas passage, a controllable air passage and a combustion chamber, wherein the combustion chamber comprises a gas mixing cavity and a plurality of combustion cavities; in the controllable combustion gas passage, combustion gas enters the gas mixing cavity through a first regulating valve, in the controllable air passage, air enters the gas mixing cavity through a second regulating valve, a first flowmeter is arranged at the first regulating valve, and a second flowmeter is arranged at the second regulating valve; an oxygen detector is also arranged and is in communication connection with the control device; all be provided with pressure sensor, temperature sensor and humidity transducer in each combustion chamber, pressure sensor, temperature sensor and humidity transducer all with intelligent control device communication. The invention operates based on a full-automatic control mode, and single variable control in the prior art is abandoned in the control process, and complex variable control is carried out.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to a combustion control system.
Background
The boiler is an energy converter, which is a device for heating working medium water or other fluids to certain parameters by using heat energy released by fuel combustion or other heat energy. The combustion reaction performed in the boiler is a condition in which the boiler supplies heat to the outside, and the degree of progress of the combustion reaction is directly related to the degree of heat generation of the boiler and the composition of gas in the exhaust gas. Therefore, there is a need for effective automated control of combustion reactions.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a combustion control system.
The invention is realized by the following technical scheme:
a combustion control system comprises a controllable combustion gas passage, a controllable air passage and a combustion chamber, wherein the combustion chamber comprises a gas mixing cavity and a plurality of combustion cavities; the gas mixing cavity and each combustion cavity are in series connection; each combustion chamber is connected in parallel; a heat exchange device is arranged outside the combustion chamber;
the combustion chamber is also communicated with an exhaust device, and the exhaust device comprises a motor and a control damper; the controllable combustion gas passage, the controllable air passage, each combustion cavity and the control damper are controlled by an intelligent control device, and each combustion cavity can be independently opened or closed;
in the controllable combustion gas passage, combustion gas enters the gas mixing cavity through a first regulating valve, in the controllable air passage, air enters the gas mixing cavity through a second regulating valve, a first flowmeter is arranged at the first regulating valve, a second flowmeter is arranged at the second regulating valve, the first flowmeter and the second flowmeter are both connected with the intelligent control device, the second regulating valve is connected with an asynchronous motor, the asynchronous motor is controlled by a thyristor starter, and the thyristor starter is controlled by the intelligent control device 100;
an oxygen detector is further arranged in the exhaust device and is in communication connection with the control device, so that the control device can conveniently acquire the current oxygen content in the exhaust gas;
each combustion cavity is internally provided with a pressure sensor, a temperature sensor and a humidity sensor which are communicated with the intelligent control device;
the intelligent control device comprises the following components:
the memory is used for storing a standard combustion chamber pressure corresponding model and a standard exhaust air content corresponding table;
the data preprocessing component is used for preprocessing data collected by the first flowmeter, the second flowmeter, the pressure sensor, the temperature sensor, the humidity sensor and the oxygen detector;
the first comparator is used for calculating the difference value between the target oxygen content and the current oxygen content in the exhaust gas to obtain a first variable;
the second comparator is used for calculating the difference value between the average pressure of the current combustion chamber and the target pressure to obtain a second variable;
the state acquirer is used for acquiring the second flowmeter count and calculating the current opening degree of the second regulating valve according to the second flowmeter count;
the regulator is used for obtaining the target starting degree of the second regulating valve and controlling the thyristor starter to finally enable the second regulating valve to reach the target starting degree;
the trigger is used for generating an adjusting instruction for controlling the second regulating valve;
the data preprocessing component comprises:
the combustion chamber data preprocessing triggering module is used for issuing a triggering instruction to the combustion chamber data preprocessing module;
the combustion chamber data preprocessing module is used for acquiring and preprocessing the pressure, the temperature and the humidity in each opened combustion chamber in the trigger instruction issuing clearance;
the non-combustion state storage module is used for storing data collected by the first flowmeter, the second flowmeter and the oxygen detector;
a combustion state storage module for storing the average pressure of each combustion chamber
Mean temperature
And average humidity
The preprocessing specifically comprises the steps of responding to a trigger instruction, eliminating abnormal values in the acquired data, and acquiring the average pressure Pi, the average temperature Ti and the average humidity Mi of a single combustion cavity; further obtaining average pressure of each combustion chamber
Mean temperature
And average humidity
The non-combustion state storage module stores the data in a continuously updated mode, so that the latest data collected by the first flow meter, the second flow meter and the oxygen detector are stored in the non-combustion state storage module.
The invention has the beneficial effects that:
the combustion control system can run based on a full-automatic control mode, single variable control in the prior art is abandoned in the control process, and complex variable control is carried out. In a specific control process, the pressure, the temperature, the humidity, the combustion gas flow, the air flow and the tail gas composition of each combustion cavity are comprehensively considered, a control scheme with strong comprehensiveness is formed, the combustion reaction in the combustion cavities can be accurately controlled based on a combustion mode, and a good control effect is achieved.
Drawings
FIG. 1 is a schematic diagram of a combustion control system according to an embodiment;
fig. 2 is a block diagram of the intelligent control device provided in the present embodiment;
FIG. 3 is a block diagram of a data preprocessing component provided by the present embodiment;
FIG. 4 is a logic flow diagram of an embodiment of a method for executing an adjust instruction;
fig. 5 is a corresponding relationship of the first variable and the contribution value of the target flow rate at the second flow meter provided by the present embodiment;
fig. 6 is a corresponding relationship of the second variable and the contribution value of the target flow rate at the second flow meter provided in the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below.
The embodiment of the invention provides a combustion control system, as shown in fig. 1, which comprises a controllable combustion gas passage 1, a controllable air passage 2 and a combustion chamber 3, wherein the controllable combustion gas passage 1 and the controllable air passage 2 are both communicated with the combustion chamber 3. The combustion chamber 3 comprises a gas mixing cavity 31 and a plurality of combustion cavities 32, and the gas mixing cavity 31 and each combustion cavity 32 are connected in series; each combustion chamber 32 is in a parallel relationship; the exterior of the combustion chamber is provided with a heat exchange device 4 for recovering the heat energy generated by combustion.
The combustion chamber 3 is also in communication with an exhaust 5, the exhaust 5 comprising an electric motor 51 and a control damper 52. Specifically, the controllable combustion gas path 1, the controllable air path 2, each combustion chamber 32, which can be independently opened or closed, and the control damper 52 are controlled by an intelligent control device 100. For N combustion chambers which are opened currently, the combustion gas and the air are evenly divided into N parts and respectively enter the opened combustion chambers, so that the control device automatically controls the air inflow of the controllable air passage according to the number of the combustion chambers which are opened currently.
In a possible embodiment, the intake air amount of the combustion gas of the controllable combustion gas passage 1 is also controllable, and the intake air amount of the combustion gas may also be used as one of the arguments of the air intake amount of the controllable air passage controlled by the control means.
In the controllable combustion gas passage 1, combustion gas enters the air mixing cavity 31 through the first regulating valve 11, in the controllable air passage 2, air enters the air mixing cavity 31 through the second regulating valve 21, the second regulating valve 21 is connected with an asynchronous motor, the asynchronous motor is controlled by a thyristor starter, and the thyristor starter is controlled by the intelligent control device 100. A first flow meter is arranged at the first regulating valve 11, a second flow meter is arranged at the second regulating valve 12, and both the first flow meter and the second flow meter are connected with the intelligent control device 100.
Specifically, each combustion chamber 32 is provided with a pressure sensor, a temperature sensor and a humidity sensor, and the pressure sensor, the temperature sensor and the humidity sensor are all communicated with the intelligent control device.
Specifically, the geometric center of the upper part of the exhaust device is provided with a convection heat exchanger which is provided with a horizontal pipeline communicated with a heat carrier so as to further recover heat energy from the exhausted flue gas.
An oxygen detector is further arranged in the exhaust device and is in communication connection with the control device, so that the control device can obtain the current oxygen content in the exhaust gas.
The intelligent control device 100 comprises the following components, as shown in fig. 2:
and the memory 101 is used for storing a standard combustion chamber pressure corresponding model and a standard exhaust air content corresponding table.
Specifically, the standard combustion chamber pressure corresponding model takes the number of combustion chamber openings, the count of the first flow meter, the combustion chamber combustion mode, the current combustion chamber humidity and the current combustion chamber temperature as independent variables, and takes the target pressure in the combustion chamber as a dependent variable. The standard combustion chamber pressure correspondence model may be obtained in a number of experimental ways.
The air content corresponding table in the standard exhaust gas takes the counting of the first flow meters of the opening number of the combustion chambers and the combustion mode of the combustion chambers as independent variables, and takes the target oxygen content in the exhaust gas as a dependent variable.
The data preprocessing component 102 is configured to preprocess data collected by the first flowmeter, the second flowmeter, the pressure sensor, the temperature sensor, the humidity sensor, and the oxygen detector, and specifically, as shown in fig. 3, the data preprocessing component 102 includes:
and the combustion chamber data preprocessing triggering module 1021 is used for issuing a triggering instruction to the combustion chamber data preprocessing module 1022.
A combustion chamber data pre-processing module 1022; the combustion cavity data preprocessing module 1022 acquires pressure, temperature and humidity in each opened combustion chamber in the trigger instruction issuing gap, and performs preprocessing, specifically, eliminates abnormal values in the acquired data in response to the trigger instruction, and acquires average pressure P i, average temperature T i and average humidity M i of a single combustion cavity; further acquiring average pressure average temperature and average humidity of each combustion chamber
The non-combustion state storage module 1023 is used for storing data collected by the first flow meter, the second flow meter and the oxygen detector. The non-combustion state storage module 1023 stores the data in a constantly updated manner, and therefore the non-combustion state storage module 1023 stores the latest data collected by the first flow meter, the second flow meter, and the oxygen detector.
A combustion state storage module 1024 for storing the average temperature and humidity of each combustion chamber, wherein the combustion state storage module 1024 stores the data in a continuously updated manner, and thus the latest average temperature and humidity of each combustion chamber is stored in the combustion state storage module 1024
A first comparator 103 for calculating a difference between a target oxygen content and a current oxygen content in the exhaust gas to obtain a first variable;
the second comparator 104 is used for calculating the difference value between the average pressure of the current combustion chamber and the target pressure to obtain a second variable;
a state acquirer 105 for acquiring a second flow meter count, and calculating a current opening degree of the second regulation valve according to the second flow meter count;
and the regulator 106 is used for acquiring a target opening degree of the second regulating valve and controlling the thyristor starter to finally enable the second regulating valve to reach the target opening degree.
A trigger 107 for generating an adjustment command for controlling the second regulating valve. Specifically, the adjustment instruction generation condition is: a triggering event of reaching the adjustment command, or the average pressure of the current combustion chamber exceeding a predetermined pressure threshold, or the average temperature of the current combustion chamber exceeding a predetermined temperature threshold, or the oxygen content in the current exhaust gas being higher than a predetermined threshold.
The execution logic of the adjustment instruction is shown in fig. 4, and includes:
s101, responding to the adjusting instruction, and acquiring a first variable by the first comparator.
S102, the second comparator obtains a second variable.
S103, the regulator obtains a target flow difference value at the second flow meter according to the formula A (α) + B (β).
The target flow difference is the difference between the target flow to be adjusted and the current flow.
Where A (α) is the contribution of the target flow difference at the second flow meter corresponding to the first variable, where α identifies the first variable, and B (β) is the contribution of the target flow difference at the second flow meter corresponding to the second variable, where β identifies the second variable.
Specifically, a (α) and B (β) can be summarized by experiments according to actual needs, a schematic diagram of a (α) in the embodiment of the present invention is shown in fig. 5, a schematic diagram of B (β) is shown in fig. 6, the variation rules of a (α) and B (β) are stored in the memory, specifically, the variation rule curve of a (α) is in a parabolic branch shape in two-four quadrants and is centrosymmetric, and the variation rule curve of B (β) is also in a centrosymmetric shape in two-four quadrants.
And S104, calculating the target opening degree of the corresponding second regulating valve by the regulator according to the target flow difference value.
The first flowmeter, the second flowmeter, the pressure sensor, the temperature sensor, the humidity sensor and the oxygen detector which are arranged in the embodiment of the invention acquire data according to the settings of the first flowmeter, the second flowmeter, the pressure sensor, the temperature sensor, the humidity sensor and the oxygen detector, and transmit the data to the intelligent control device.
And S105, the state acquirer acquires the current opening degree of the second regulating valve and transmits the current opening degree to the regulator.
And S106, driving the thyristor starter by the regulator according to the current starting degree and the target starting degree.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (1)
1. A combustion control system is characterized by comprising a controllable combustion gas passage, a controllable air passage and a combustion chamber, wherein the combustion chamber comprises a gas mixing cavity and a plurality of combustion cavities; the gas mixing cavity and each combustion cavity are in series connection; each combustion chamber is connected in parallel; a heat exchange device is arranged outside the combustion chamber;
the combustion chamber is also communicated with an exhaust device, and the exhaust device comprises a motor and a control damper; the controllable combustion gas passage, the controllable air passage, each combustion cavity and the control damper are controlled by an intelligent control device, and each combustion cavity can be independently opened or closed;
in the controllable combustion gas passage, combustion gas enters the gas mixing cavity through a first regulating valve, in the controllable air passage, air enters the gas mixing cavity through a second regulating valve, a first flowmeter is arranged at the first regulating valve, a second flowmeter is arranged at the second regulating valve, the first flowmeter and the second flowmeter are both connected with the intelligent control device, the second regulating valve is connected with an asynchronous motor, the asynchronous motor is controlled by a thyristor starter, and the thyristor starter is controlled by the intelligent control device 100;
an oxygen detector is further arranged in the exhaust device and is in communication connection with the control device, so that the control device can conveniently acquire the current oxygen content in the exhaust gas;
each combustion cavity is internally provided with a pressure sensor, a temperature sensor and a humidity sensor which are communicated with the intelligent control device;
the intelligent control device comprises the following components:
the memory is used for storing a standard combustion chamber pressure corresponding model and a standard exhaust air content corresponding table;
the data preprocessing component is used for preprocessing data collected by the first flowmeter, the second flowmeter, the pressure sensor, the temperature sensor, the humidity sensor and the oxygen detector;
the first comparator is used for calculating the difference value between the target oxygen content and the current oxygen content in the exhaust gas to obtain a first variable;
the second comparator is used for calculating the difference value between the average pressure of the current combustion chamber and the target pressure to obtain a second variable;
the state acquirer is used for acquiring the second flowmeter count and calculating the current opening degree of the second regulating valve according to the second flowmeter count;
the regulator is used for obtaining the target starting degree of the second regulating valve and controlling the thyristor starter to finally enable the second regulating valve to reach the target starting degree;
the trigger is used for generating an adjusting instruction for controlling the second regulating valve;
the data preprocessing component comprises:
the combustion chamber data preprocessing triggering module is used for issuing a triggering instruction to the combustion chamber data preprocessing module;
the combustion chamber data preprocessing module is used for acquiring and preprocessing the pressure, the temperature and the humidity in each opened combustion chamber in the trigger instruction issuing clearance;
the non-combustion state storage module is used for storing data collected by the first flowmeter, the second flowmeter and the oxygen detector;
a combustion state storage module for storing the average pressure of each combustion chamber
Mean temperature
And average humidity
The preprocessing specifically comprises the steps of responding to a trigger instruction, eliminating abnormal values in the acquired data, and acquiring the average pressure Pi, the average temperature Ti and the average humidity Mi of a single combustion cavity; further obtaining average pressure of each combustion chamber
Mean temperature
And average humidity
The non-combustion state storage module stores the data in a continuously updated mode, so that the latest data collected by the first flow meter, the second flow meter and the oxygen detector are stored in the non-combustion state storage module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911292535.XA CN110986086A (en) | 2018-08-06 | 2018-08-06 | Combustion control system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810884507.6A CN109084325B (en) | 2018-08-06 | 2018-08-06 | Comprehensive combustion control system |
| CN201911292535.XA CN110986086A (en) | 2018-08-06 | 2018-08-06 | Combustion control system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810884507.6A Division CN109084325B (en) | 2018-08-06 | 2018-08-06 | Comprehensive combustion control system |
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| Publication Number | Publication Date |
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| CN110986086A true CN110986086A (en) | 2020-04-10 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911292535.XA Withdrawn CN110986086A (en) | 2018-08-06 | 2018-08-06 | Combustion control system |
| CN201810884507.6A Active CN109084325B (en) | 2018-08-06 | 2018-08-06 | Comprehensive combustion control system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810884507.6A Active CN109084325B (en) | 2018-08-06 | 2018-08-06 | Comprehensive combustion control system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114540084B (en) * | 2020-11-24 | 2024-02-27 | 江苏嘉林新能源科技有限公司 | Biomass gasification thermal carbon co-production system with independent oxidation chambers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102144125A (en) * | 2008-07-15 | 2011-08-03 | 卡万塔能源公司 | System and method for gasification-combustion process using post combustor |
| US8906301B2 (en) * | 2009-09-15 | 2014-12-09 | General Electric Company | Combustion control system and method using spatial feedback and acoustic forcings of jets |
| CN203454183U (en) * | 2013-08-29 | 2014-02-26 | 北京硕人海泰能源环境技术有限公司 | Burner assembly for converter waste heat recovery boiler |
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2018
- 2018-08-06 CN CN201911292535.XA patent/CN110986086A/en not_active Withdrawn
- 2018-08-06 CN CN201810884507.6A patent/CN109084325B/en active Active
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| CN109084325A (en) | 2018-12-25 |
| CN109084325B (en) | 2020-03-31 |
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Application publication date: 20200410 |
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