CN202993251U - Automatic control system for air distribution optimization of boiler - Google Patents
Automatic control system for air distribution optimization of boiler Download PDFInfo
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- CN202993251U CN202993251U CN2012206867473U CN201220686747U CN202993251U CN 202993251 U CN202993251 U CN 202993251U CN 2012206867473 U CN2012206867473 U CN 2012206867473U CN 201220686747 U CN201220686747 U CN 201220686747U CN 202993251 U CN202993251 U CN 202993251U
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Abstract
The utility model provides an automatic control system for air distribution optimization of a boiler. The automatic control system comprises a boiler hearth, an air blower, a boiler tail flue, an induced draft fan, a depressimeter, an oxymeter and a PLC automatic control system, wherein the PLC automatic control system is used for setting a negative pressure set value and an oxygen set value of the hearth; the depressimeter and the oxymeter are used for measuring the negative pressure in the boiler hearth to obtain a negative pressure measured value and oxygen at the boiler tail flue to obtain an oxygen measured value; the PLC automatic control system receives the negative pressure measured value and the oxygen measured value, compares the negative pressure measured value and the oxygen measured value with the negative pressure set value and oxygen set value of the hearth, and sends a command as per the comparative result to regulate the air input amount of the induced draft fan and blasting air of the air blower so as to regulate the negative pressure in the boiler hearth and oxygen in the boiler tail flue behind the last-stage heating surface of the boiler within the set values, and the boiler always runs in an economic situation, and automatic regulation of oxygen or hearth negative pressure can be adopted independently.
Description
Technical field
The utility model relates to the boiler energy-saving technology, more particularly, relates to a kind of boiler wind speed adjustment and optimizes automatic control system.
Background technology
Boiler is the equipment of highly energy-consuming, and One's name is legion.It is low that the active boiler ubiquity of present China efficiency, the problem that energy waste is serious.It is the problem that current most boiler exists that thereby the boiler exhaust gas heat loss that causes because boiler wind speed adjustment is bad and incomplete combustion loss make greatly boiler thermal output on the low side.The reason one that causes this kind situation is that the assembling of energy-saving metering device is incomplete, the 2nd, and boiler operation situation is changeable, and the 3rd, do not regulate accordingly according to ruuning situation.
The utility model content
The technical problems to be solved in the utility model is, for the problems referred to above that exist in boiler running process, provide a kind of boiler wind speed adjustment to optimize automatic control system, can carry out the air distribution of boiler automatically controlling and automatically adjusting, make boiler remain at economic running status.
For solving the problems of the technologies described above, the utility model has adopted following technical scheme:
Provide a kind of boiler wind speed adjustment to optimize automatic control system, comprising:
Boiler furnace;
Air blast, described air blast is connected with boiler furnace, for air blast in boiler furnace;
Boiler back end ductwork, described boiler back end ductwork is connected with boiler furnace, is used for the discharging flue gas;
Air-introduced machine, described air-introduced machine are located in boiler back end ductwork so that boiler furnace is carried out outside air inducing;
Depressimeter, described depressimeter is located in boiler furnace, is used for measuring the negative pressure in boiler furnace and exporting the negative pressure measured value;
After oxygen amount meter, described oxygen amount meter are located in boiler back end ductwork and are positioned at boiler final stage heating surface, be used for measuring the oxygen amount of the boiler back end ductwork after boiler final stage heating surface and export the oxygen content measurement value;
The PLC automatic control system, described PLC automatic control system is taken into account oxygen amount meter with air blast, air-introduced machine, negative pressure and is electrically connected to, and the PLC automatic control system is used for: set combustion chamber draft setting value and oxygen amount setting value; The negative pressure measured value that the reception depressimeter is exported also compares with the combustion chamber draft setting value, controls the air inducing amount of air-introduced machine to the air-introduced machine sending controling instruction according to the comparative result of negative pressure measured value and combustion chamber draft setting value; The oxygen content measurement value that reception oxygen amount meter is exported also compares with oxygen amount setting value, controls the blow rate required of air blast to the air blast sending controling instruction according to the comparative result of oxygen content measurement value and oxygen amount setting value.
Preferably, described air blast comprises the first blower fan body, the first motor and the first damper, rotating speed by regulating the first motor and/or the aperture of the first damper are controlled the blow rate required of air blast, described air-introduced machine comprises the second blower fan body, the second motor and the second damper, and the rotating speed by regulating the second motor and/or the aperture of the second damper are controlled the air inducing amount of air-introduced machine.
Preferably, described the first motor and the second motor are frequency control motor, be separately installed with the first aperture executing agency and the second aperture executing agency on described the first damper and the second damper, described PLC automatic control system and described the first motor, the second motor, the first aperture executing agency and the second aperture executing agency are electrically connected to.
Preferably, described oxygen amount meter is located in boiler back end ductwork and is positioned at boiler final stage heating surface one meter scope afterwards.
Preferably, described PLC automatic control system is provided with timer, described timer is used for the setting-up time interval, described PLC automatic control system also be used for time interval of setting according to timer periodic gather negative pressure measured value and oxygen content measurement value and set value with combustion chamber draft setting value and oxygen amount compare respectively.
Boiler wind speed adjustment of the present utility model is optimized automatic control system and is had following beneficial effect: can automatically adjust oxygen value and combustion chamber draft value in setting value, boiler is moved under economic situation all the time, also can adopt separately the automatic adjusting of oxygen consuming amount or adopt separately the automatic adjusting of combustion chamber draft that boiler is moved under economic situation all the time.
Description of drawings
Fig. 1 is the structural representation that the utility model boiler wind speed adjustment is optimized automatic control system one preferred embodiment.
Fig. 2 is the schematic flow sheet that the optimization of the utility model boiler wind speed adjustment is controlled automatically.
The specific embodiment
Below in conjunction with specific embodiment and Figure of description, the utility model is described in further details.
As shown in Figure 1, optimize a preferred embodiment of automatic control system for the utility model boiler wind speed adjustment.
Described boiler wind speed adjustment is optimized automatic control system, comprising: boiler furnace 1, air blast 2, boiler back end ductwork 3, air-introduced machine 4, depressimeter 5, oxygen amount meter 6 and PLC automatic control system 7.
Described air blast 2 is connected with boiler furnace 1, is used for to the interior air blast of boiler furnace 1.
Described boiler back end ductwork 3 is connected with boiler furnace 1, is used for the discharging flue gas.
Described air-introduced machine 4 is located in boiler back end ductwork 3 so that boiler furnace 1 is carried out outside air inducing, so that the flue gas in boiler furnace 1 is caused chimney.
Described depressimeter 5 is located in boiler furnace 1, is used for measuring the negative pressure in boiler furnace 1 and exporting the negative pressure measured value.
After described oxygen amount meter 6 is located in boiler back end ductwork 3 and is positioned at boiler final stage heating surface 31, be used for measuring the oxygen amount of the boiler back end ductwork 3 after boiler final stage heating surface 31 and export the oxygen content measurement value.Described boiler final stage heating surface 31 can be arranged in boiler back end ductwork 3 or boiler furnace 1, and in the present embodiment, described boiler final stage heating surface 31 is arranged in boiler back end ductwork 3.
Described PLC automatic control system 7 is electrically connected to air blast 2, air-introduced machine 4, depressimeter 5 and oxygen amount meter 6.Described PLC automatic control system 7 is used for: set combustion chamber draft setting value and oxygen amount setting value, wherein combustion chamber draft setting value and oxygen amount setting value can be an occurrence or a value range; The negative pressure measured value that reception depressimeter 5 is exported also compares with the combustion chamber draft setting value, controls the air inducing amount of air-introduced machine 4 to air-introduced machine 4 sending controling instructions according to the comparative result of negative pressure measured value and combustion chamber draft setting value; The oxygen content measurement value that reception oxygen amount meter 6 is exported also compares with oxygen amount setting value, controls the blow rate required of air blast 2 to air blast 2 sending controling instructions according to the comparative result of oxygen content measurement value and oxygen amount setting value.
In the present embodiment, described air blast 2 comprises the first blower fan body 21, the first motor 22 and the first damper 23, rotating speed by regulating the first motor 22 and/or the aperture of the first damper 23 are controlled the blow rate required of air blast 2, described air-introduced machine 4 comprises the second blower fan body 41, the second motor 42 and the second damper 43, and the rotating speed by regulating the second motor 42 and/or the aperture of the second damper 43 are controlled the air inducing amount of air-introduced machine 4.
Described the first motor 22 and the second motor 42 are frequency control motor, be separately installed with first aperture executing agency's (not shown) and the second aperture executing agency (not shown) on described the first damper 23 and the second damper 43, described PLC automatic control system 7 and described the first motor 22, the second motor 42, the first aperture executing agency and the second aperture executing agency are electrically connected to, so that the first motor 22, the second motor 42, the first aperture executing agency and the second aperture executing agency are controlled.Described the first aperture executing agency can adopt and existingly can realize that the first damper 23 regulates the device of aperture according to step value, for example comprise the rotating shaft that is connected between the first damper 23 and the first blower fan body 21, and drive stepper motor that the first damper 23 rotates or frequency control motor etc., thereby 7 pairs of stepper motors of PLC automatic control system or frequency control motor are controlled the aperture of regulating the first damper 23.Described the second aperture executing agency can adopt the device identical with the first aperture executing agency.
Preferably, described oxygen amount meter 6 is located in boiler back end ductwork 3 and is positioned at boiler final stage heating surface 31 one meter scope afterwards, to measure as far as possible exactly the oxygen amount in boiler final stage heating surface 31 boiler back end ductwork 3 afterwards.
Described PLC automatic control system 7 is provided with timer, described timer is for the setting-up time interval, and the oxygen content measurement value that the negative pressure measured value that periodic collection of the time interval depressimeter 5 that described PLC automatic control system 7 also is used for setting according to timer is surveyed and oxygen amount meter 6 are surveyed also sets value with combustion chamber draft and oxygen amount setting value compares respectively.
Above-mentioned boiler wind speed adjustment is optimized automatic control system, can automatically adjust oxygen value and combustion chamber draft value boiler is moved under economic situation all the time, also can adopt separately the automatic adjusting of oxygen consuming amount or adopt separately the automatic adjusting of combustion chamber draft that boiler is moved under economic situation all the time.
As shown in Figure 2, the schematic flow sheet of automatically controlling for the optimization of the utility model boiler wind speed adjustment.Comprising following steps:
(a) set combustion chamber draft setting value and oxygen amount setting value in PLC automatic control system 7, wherein combustion chamber draft setting value and oxygen amount setting value can be an occurrence or a value range;
(b) negative pressure of measuring in boiler furnace 1 obtains the negative pressure measured value, and the oxygen of measuring in boiler final stage heating surface 31 boiler back end ductwork 3 afterwards measures the oxygen content measurement value;
(c) gather measured negative pressure measured value and oxygen content measurement value and compare with the combustion chamber draft setting value that sets and oxygen amount setting value respectively by PLC automatic control system 7, and carry out following operation according to comparative result: if negative pressure measured value and oxygen content measurement value all in setting value, execution in step (d); If the negative pressure measured value not in set best negative pressure value, is adjusted the interior negative pressure value of boiler furnace 1 by the air inducing amount of PLC automatic control system 7 sending controling instructions adjusting air-introduced machines 4; If the oxygen content measurement value is not in set oxygen amount setting value, the blow rate required of regulating air blasts 2 by PLC automatic control system 7 sending controling instructions is adjusted the oxygen value in boiler back end ductwork 3 after boiler final stage heating surface 31.
Stop adjusting when the oxygen value in the boiler back end ductwork 3 after the negative pressure value in boiler furnace 1 and boiler final stage heating surface 31 is adjusted in separately setting value, boiler moves under economic scene.
(d) set time interval and waiting for, return to step (c) during the interval time of advent and continue monitoring.
In monitor procedure, if the ruuning situation of boiler changes, i.e. the parameter value of actual measurement changes and not in setting value the time, adjusts according to the method in step (c).In the process that whole control is adjusted, the adjustment of the adjustment of oxygen value and combustion chamber draft value is two independently systems.
Described oxygen amount setting value and combustion chamber draft setting value calculate for the design load of boiler or through measurement, and wherein oxygen amount setting value and combustion chamber draft setting value can be an occurrence or a value range.Described oxygen amount setting value is best oxygen value and the best combustion chamber draft value during for boiler operatiopn with the combustion chamber draft setting value, and it can be oxygen value and combustion chamber draft value (being the design load of boiler) that boiler dispatches from the factory and recommends on data.In actual boiler operatiopn, it is different from design fuel that the actual fuel that uses can appear, boiler operation situation is changeable, need this moment the design parameter according to boiler operatiopn to carry out measurements and calculations and draw best oxygen value and best combustion chamber draft value, and it is set value as oxygen amount setting value and combustion chamber draft.
Negative pressure measured value in described boiler furnace 1 is measured by the depressimeter 5 of being located in boiler furnace 1, and exports the numerical signal corresponding with the negative pressure measured value to PLC automatic control system 7 by described depressimeter 5; Oxygen content measurement value in boiler back end ductwork 3 after described boiler final stage heating surface 31 is by being installed in boiler back end ductwork 3 and being positioned at that the oxygen amount meter 6 of one meter scope measures after boiler final stage heating surface 31, and by the described oxygen amount meter 6 outputs numerical signal corresponding with the oxygen content measurement value to PLC automatic control system 7.
In described step (c), the step that the blow rate required of regulating air blasts 2 by PLC automatic control system 7 sending controling instructions is adjusted the negative pressure value in boiler furnace 1 is specially: the step value of being set the damper aperture of the motor speed of air-introduced machines 4 or air-introduced machine 4 by PLC automatic control system 7, and send instruction according to the step value of setting, thereby the damper aperture of the motor speed by adjusting air-introduced machine 4 or air-introduced machine 4 is regulated the air inducing amount of air-introduced machine 4 and is adjusted negative pressure value in boiler furnace 1; In described step (c), the step that the blow rate required of regulating air blasts 2 by PLC automatic control system 7 sending controling instructions is adjusted the oxygen value in boiler back end ductwork 3 after boiler final stage heating surface 31 is specially: the step value of being set the damper aperture of the motor speed of air blasts 2 or air blast 2 by PLC automatic control system 7, and sending instruction according to the step value of setting, the motor speed by adjusting air blast 2 or the damper aperture of air blast 2 are adjusted the oxygen value at boiler final stage heating surface 31 places;
The described time interval is set by timer, and the time interval that described PLC automatic control system 7 is set according to timer periodically gathers negative pressure measured value and oxygen content measurement value and compares respectively with combustion chamber draft setting value and oxygen amount setting value.
Step is controlled in above-mentioned boiler wind speed adjustment optimization automatically, can automatically adjust oxygen value and combustion chamber draft value in setting value, boiler is moved under economic situation all the time, also can adopt separately the automatic adjusting of oxygen consuming amount or adopt separately the automatic adjusting of combustion chamber draft that boiler is moved under economic situation all the time.
The above is only the embodiment of preferably selecting of the present utility model, and protection domain of the present utility model also not only is confined to above-described embodiment, and all technical schemes that belongs under the utility model thinking all belong to protection domain of the present utility model.Should be pointed out that for those skilled in the art, in the some improvements and modifications that do not break away under the utility model principle prerequisite, these improve each retouching also should be considered as protection domain of the present utility model.
Claims (5)
1. a boiler wind speed adjustment is optimized automatic control system, it is characterized in that, comprising:
Boiler furnace;
Air blast, described air blast is connected with boiler furnace, for air blast in boiler furnace;
Boiler back end ductwork, described boiler back end ductwork is connected with boiler furnace, is used for the discharging flue gas;
Air-introduced machine, described air-introduced machine are located in boiler back end ductwork so that boiler furnace is carried out outside air inducing;
Depressimeter, described depressimeter is located in boiler furnace, is used for measuring the negative pressure in boiler furnace and exporting the negative pressure measured value;
After oxygen amount meter, described oxygen amount meter are located in boiler back end ductwork and are positioned at boiler final stage heating surface, be used for measuring the oxygen amount of the boiler back end ductwork after boiler final stage heating surface and export the oxygen content measurement value;
The PLC automatic control system, described PLC automatic control system is taken into account oxygen amount meter with air blast, air-introduced machine, negative pressure and is electrically connected to, and the PLC automatic control system is used for: set combustion chamber draft setting value and oxygen amount setting value; The negative pressure measured value that the reception depressimeter is exported also compares with the combustion chamber draft setting value, controls the air inducing amount of air-introduced machine to the air-introduced machine sending controling instruction according to the comparative result of negative pressure measured value and combustion chamber draft setting value; The oxygen content measurement value that reception oxygen amount meter is exported also compares with oxygen amount setting value, controls the blow rate required of air blast to the air blast sending controling instruction according to the comparative result of oxygen content measurement value and oxygen amount setting value.
2. boiler wind speed adjustment according to claim 1 is optimized automatic control system, it is characterized in that, described air blast comprises the first blower fan body, the first motor and the first damper, rotating speed by regulating the first motor and/or the aperture of the first damper are controlled the blow rate required of air blast, described air-introduced machine comprises the second blower fan body, the second motor and the second damper, and the rotating speed by regulating the second motor and/or the aperture of the second damper are controlled the air inducing amount of air-introduced machine.
3. boiler wind speed adjustment according to claim 2 is optimized automatic control system, it is characterized in that, described the first motor and the second motor are frequency control motor, be separately installed with the first aperture executing agency and the second aperture executing agency on described the first damper and the second damper, described PLC automatic control system and described the first motor, the second motor, the first aperture executing agency and the second aperture executing agency are electrically connected to.
4. boiler wind speed adjustment according to claim 1 is optimized automatic control system, it is characterized in that, described oxygen amount meter is located in boiler back end ductwork and is positioned at boiler final stage heating surface one meter scope afterwards.
5. boiler wind speed adjustment according to claim 1 is optimized automatic control system, it is characterized in that, described PLC automatic control system is provided with timer, described timer is used for the setting-up time interval, described PLC automatic control system also be used for time interval of setting according to timer periodic gather negative pressure measured value and oxygen content measurement value and set value with combustion chamber draft setting value and oxygen amount compare respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206867473U CN202993251U (en) | 2012-12-13 | 2012-12-13 | Automatic control system for air distribution optimization of boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206867473U CN202993251U (en) | 2012-12-13 | 2012-12-13 | Automatic control system for air distribution optimization of boiler |
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| CN202993251U true CN202993251U (en) | 2013-06-12 |
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| CN2012206867473U Expired - Fee Related CN202993251U (en) | 2012-12-13 | 2012-12-13 | Automatic control system for air distribution optimization of boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017196A (en) * | 2012-12-13 | 2013-04-03 | 深圳市特种设备安全检验研究院 | Air distribution optimized automatic control system and control method thereof of boiler |
| CN105082318A (en) * | 2015-08-19 | 2015-11-25 | 广西三威林产工业有限公司 | Thermal energy air inducing device for fiber board production line |
| CN110145761A (en) * | 2019-05-21 | 2019-08-20 | 江苏方天电力技术有限公司 | A kind of BFG boiler negative pressure optimal control method |
-
2012
- 2012-12-13 CN CN2012206867473U patent/CN202993251U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017196A (en) * | 2012-12-13 | 2013-04-03 | 深圳市特种设备安全检验研究院 | Air distribution optimized automatic control system and control method thereof of boiler |
| CN103017196B (en) * | 2012-12-13 | 2015-11-18 | 深圳市特种设备安全检验研究院 | Boiler wind speed adjustment optimizes automatic control system and control method thereof |
| CN105082318A (en) * | 2015-08-19 | 2015-11-25 | 广西三威林产工业有限公司 | Thermal energy air inducing device for fiber board production line |
| CN110145761A (en) * | 2019-05-21 | 2019-08-20 | 江苏方天电力技术有限公司 | A kind of BFG boiler negative pressure optimal control method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20151213 |
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| EXPY | Termination of patent right or utility model |