CN104214793A - Continuous adjusting device for combustion air - Google Patents
Continuous adjusting device for combustion air Download PDFInfo
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- CN104214793A CN104214793A CN201310222780.XA CN201310222780A CN104214793A CN 104214793 A CN104214793 A CN 104214793A CN 201310222780 A CN201310222780 A CN 201310222780A CN 104214793 A CN104214793 A CN 104214793A
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- frequency converter
- air
- pressure transmitter
- adjusting device
- continuous
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Abstract
The invention relates to the field of metallurgy and relates to an air adjusting device, in particular to a continuous adjusting device for combustion air. The continuous adjusting device for combustion air comprises an air blower, a frequency converter, an adjusting valve, a pressure transmitter and a PID controller. The frequency converter is connected to the air blower. The adjusting valve is arranged at the position of an inlet of the air blower. The pressure transmitter is arranged at the position of an outlet of the air blower. The adjusting valve, the frequency converter and the pressure transmitter are all connected to the PID controller. The adjusting valve, the frequency converter, the pressure transmitter and the PID controller form a PID continuous automatic closed adjusting loop. By the adoption of the continuous adjusting device for combustion air, under the condition that normal operation of the draught fan is guaranteed, the air volume and the air pressure are adjusted through adjustment of the adjusting valve and frequency conversion of the frequency converter, the production requirement for small air volume is met, the residual oxygen content of smoke is reduced, air-fuel ratio is optimized, and therefore the purposes of saving energy and reducing consumption are achieved.
Description
Technical field
The invention belongs to metallurgical technology field, be specifically related to the conditioner of field of steel metallurgy, specifically a kind of combustion-supporting air continuous adjusting device.
Background technology
The wind supply quantity of rational control industrial heating furnace can optimize empty combustion proportioning, the right proportioning of rational sky not only can improve the efficiency of combustion of fuel, effectively reduce gas consumption, reduce heat loss due to exhaust gas, but also can the residual oxygen content of conservative control flue gas, reduce the oxidization burning loss of steel billet, improve the lumber recovery of steel billet.In prior art, the wind supply quantity of industrial heating furnace is generally regulated by the frequency converter be located on air blast, is regulated the revolution of air blast by frequency converter, controls wind supply quantity, but come with some shortcomings: when required wind supply quantity is minimum, regulates can not meet the demands by frequency converter frequency conversion; Also have when wind supply quantity is less, and frequency converter frequency conversion is lower, this kind of state for extended periods operation can cause certain harmful effect to blower motor.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, proposes a kind of combustion-supporting air continuous adjusting device, can meet the requirement of producing required little air quantity, reduces the residual oxygen content of flue gas, optimizes empty combustion proportioning, energy-saving and cost-reducing.
The present invention is achieved by the following technical solutions:
Combustion-supporting air continuous adjusting device of the present invention, is characterized in that it comprises air blast, frequency converter, control valve, pressure transmitter, PID controller; Described air blast is connected with frequency converter, control valve is provided with at the entrance of described air blast, pressure transmitter is provided with in the outlet of described air blast, described control valve, frequency converter and pressure transmitter are all connected to a PID controller, and described control valve, frequency converter, pressure transmitter and PID controller form the continuous automated closed-loop regulating loop of PID.
The beneficial effect that the present invention compared with prior art has is:
The present invention is when ensureing that blower fan normally runs, air quantity and blast is regulated by regulating fans entrance valve and frequency converter frequency conversion, meet the requirement of little air quantity needed for producing, reduce the residual oxygen content of flue gas, optimize empty combustion proportioning, thus the object reaching energy-conservation, lower consumption.The present invention can reasonably control heating furnace wind supply quantity, effectively reduces gas consumption and the heating furnace oxidization burning loss at stove blank, and residual for original flue gas oxygen content is dropped to current 5% by 9%, can fuel saving.
Accompanying drawing explanation
Figure l is connection diagram of the present invention.
The explanation of each parts in accompanying drawing:
1, air blast; 2, frequency converter; 3, control valve; 4, pressure transmitter; 5, PID controller.
Detailed description of the invention
Specific embodiments of the present invention is described in detail with reference to the accompanying drawings.
If Fig. 1 is connection diagram of the present invention.
The present embodiment proposes a kind of combustion-supporting air continuous adjusting device, connects as shown in Figure l, comprises air blast l, frequency converter 2, control valve 3, pressure transmitter 4, PID controller 5; Described air blast 1 is connected with frequency converter 2, control valve 3 is provided with at the entrance of described air blast 1, pressure transmitter 4 is provided with in the outlet of described air blast 1, described control valve 3, frequency converter 2 and pressure transmitter 4 are all connected to a PID controller 5, and described control valve 3, frequency converter 2, pressure transmitter 4 and PID controller 5 form the continuous automated closed-loop regulating loop of PID.
During concrete operations, when needing to increase air quantity, first regulate control valve 3, can't meet the needs of production if control valve 3 reaches full scale, then regulate frequency converter 2 frequency conversion; When needing to reduce air quantity, first regulate frequency converter 2 frequency conversion, if the lower limit allowed is closed in frequency converter 2 frequency conversion can't meet air quantity required for production, then regulate control valve 3.Control valve 3 and frequency converter 2 all form the continuous automated closed-loop regulating loop of PID with air blast 1 outlet pressure.
The present invention carrys out stabilizing blower 1 outlet pressure by regulating control valve 3 and frequency converter 2 VFC blower fan revolution, according to fluid machinery mechanics,, caliber certain at medium is certain, blast (dynamic pressure) H and flow velocity n square are directly proportional, flow Q and flow velocity n is directly proportional, so air blast 1 just effectively can be controlled by control air blast 1 outlet pressure export air quantity, minimum air quantity 6500rri3/h can be controlled.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (1)
1. a combustion-supporting air continuous adjusting device, is characterized in that, it comprises air blast (1), frequency converter (2), control valve (3), pressure transmitter (4), PID controller (5); Described air blast (1) is connected with frequency converter (2), control valve (3) is provided with at the entrance of described air blast (1), pressure transmitter (4) is provided with in the outlet of described air blast (1), described control valve (3), frequency converter (2) and pressure transmitter (4) are all connected to a PID controller (5), and described control valve (3), frequency converter (2), pressure transmitter (4) and PID controller (5) form the continuous automated closed-loop regulating loop of PID.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310222780.XA CN104214793A (en) | 2013-06-05 | 2013-06-05 | Continuous adjusting device for combustion air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310222780.XA CN104214793A (en) | 2013-06-05 | 2013-06-05 | Continuous adjusting device for combustion air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104214793A true CN104214793A (en) | 2014-12-17 |
Family
ID=52096553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310222780.XA Pending CN104214793A (en) | 2013-06-05 | 2013-06-05 | Continuous adjusting device for combustion air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104214793A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066169A (en) * | 2015-09-14 | 2015-11-18 | 上海易尔思节能系统有限公司 | Air distribution energy-saving device suitable for combustor |
| CN105650672A (en) * | 2015-12-30 | 2016-06-08 | 重庆南方热力工程技术公司 | Electronic air-fuel ratio regulation system |
-
2013
- 2013-06-05 CN CN201310222780.XA patent/CN104214793A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066169A (en) * | 2015-09-14 | 2015-11-18 | 上海易尔思节能系统有限公司 | Air distribution energy-saving device suitable for combustor |
| CN105650672A (en) * | 2015-12-30 | 2016-06-08 | 重庆南方热力工程技术公司 | Electronic air-fuel ratio regulation system |
| CN105650672B (en) * | 2015-12-30 | 2018-02-16 | 重庆南方热力工程技术公司 | Air-fuel electrical proportional regulating system |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141217 |