CN203454913U - Control device of flue gas waste heat recovery equipment - Google Patents
Control device of flue gas waste heat recovery equipment Download PDFInfo
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- CN203454913U CN203454913U CN201320498350.6U CN201320498350U CN203454913U CN 203454913 U CN203454913 U CN 203454913U CN 201320498350 U CN201320498350 U CN 201320498350U CN 203454913 U CN203454913 U CN 203454913U
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- flue gas
- waste heat
- heat recovery
- gas waste
- recovery equipment
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Abstract
The utility model discloses a control device of flue gas waste heat recovery equipment. The control device comprises a box, a fuzzy controller, a PID (Proportion Integration Differentiation) controller, input terminals and output terminals, wherein the fuzzy controller and the PID controller are both fixedly arranged in the box; the box is provided with a plurality of input terminals and output terminals; the input terminals are connected with a temperature sensor which is arranged on the flue gas waste heat recovery equipment through signal cables and are connected with the fuzzy controller through data cables; the fuzzy controller is connected with the PID controller through a data cable; the PID controller is connected with a plurality of output terminals on the box through cables; the output terminals are connected with each electric valve on the flue gas waste heat recovery equipment through data cables. According to the control device, a control signal is acquired by calculating the input temperature data to control the amplitudes of closing and opening of each electric valve, thereby realizing that the wall temperature of a heat exchange wall in the flue gas waste heat recovery equipment is on an acid dew point all the time.
Description
Technical field
The utility model relates to a kind of waste heat recovery control field, specifically a kind of control device of the low-temperature receiver flow-control for flue gas waste heat recovery equipment.
Background technology
The exhaust gas temperature of boiler actual motion is higher than the design exhaust gas temperature that dispatches from the factory, and the ratio that flue gas loss accounts for boiler heat loss is very large, makes full use of fume afterheat, not only meets energy-saving and emission-reduction policy requirements, and also can reduce using of enterprise can cost simultaneously.
Fume afterheat utilizes equipment little by little by commercialization at present.Waste heat technology in flue gas can be divided into direct heat transfer and two kinds of modes of indirect heat exchange.
(1) take the direct heat transfer that low-pressure coal saver is representative, simple in structure, heat exchange efficiency is higher, but heat exchanger tube exists larger wall surface temperature gradient, crosses over acid dew point upper and lower, easily causes corrosion and the dust stratification of heat exchange tube wall.For avoiding corrosion, people are by improving low-temperature receiver aspect or material aspect, whole low-temperature receiver is heated up, allow more than replace tubes wall temperature is controlled at acid dew point as far as possible, avoided corrosion region, as the low-pressure coal saver > > of the < < of patent CN201764488 with automatic temperature control system, the < < generator set low-pressure economizer optimizing system > > of CN20173147U, the anticorrosion energy-saving boiler flue gas residual heat using device of the < < > > of CN201028791Y, all mentioned wall temperature control.Existing low-pressure coal saver has accessed Outer Tube water distribution at lower collecting box first row tube side, the finite capacity of the water yield that cause is conditioned in pipeline, in addition the external world can provide metastable heat source temperature to be limited in scope, the result that cold and heat source temperature dynamic changes, objectively caused wall temperature to change cannot meeting all the time the realization higher than the control strategy of acid dew point, after moving some periods, appearance point corrodes, and to production safety, brings hidden danger, has also reduced the economy of equipment investment.
(2) take the indirect heat exchange technology that heat exchange of heat pipe and phase-change heat-exchanger be representative, solved the problem of wall temperature corrosion, as the medium heat exchange device > > of the < < shunting mixing temperature adjustment of patent CN2555468Y, 01254156.7 < < separated composite phase-change heat-exchanger > >, 92102776 < < complex phase-change heat exchanger > > etc.But total rate of heat transfer is more relatively low than direct heat transfer, is waiting under the condition of wall temperature, and its cooling extent is limited, special because of structure, also exists the limited constraint in installation site.
To sum up, no matter be direct heat transfer and indirect heat exchange equipment, most devices all need to regulate low-temperature receiver water temperature or flow, to keep the wall temperature of heat exchanger on acid dew point.But because waste heat recovery apparatus heat transfer temperature difference is little, cause rate of heat transfer slow, the low-temperature receiver regulating and the time lag of flue gas heat exchange, belong to typical large Inertia Temperature regulating system.For this large Inertia Temperature regulating system, its temperature controlled difficult point is to control the uncertainty of timeliness.Be embodied in: in traditional control system, after control instruction is assigned, a sink temperature regulating cycle not yet finishes or is not also had enough time to respond by control object, just may there is again variation in system running environment, now control system collects after new running parameter, can send new control instruction again, thereby cause the vibration of system indefinite, make its wall temperature produce the fluctuation of certain amplitude, in a period of time, can not reach setting value, cannot maintain its wall temperature always on acid dew point, be difficult to obtain desired control effect.
Utility model content
The purpose of this utility model be to provide a kind of can be for the control device of the flow of flue gas waste heat recoverer low-temperature receiver.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A control device for flue gas waste heat recovery equipment, includes cabinet, fuzzy controller, PID controller, input terminal, lead-out terminal.
Fuzzy controller, PID controller are all fixedly mounted in cabinet;
Described cabinet is provided with a plurality of input terminals, lead-out terminal;
As a kind of preferred, described input terminal adopts PROFIBUS interface;
Described input terminal is connected with the temperature sensor being arranged on flue gas waste heat recovery equipment by signal cable;
Described input terminal is connected with fuzzy controller by data cable;
Described fuzzy controller is connected with PID controller by data cable;
Described PID controller is connected with a plurality of lead-out terminals that are located on cabinet by cable;
Described lead-out terminal is connected with each electrically operated valve on flue gas waste heat recovery equipment by data cable.
The utility model coordinates by fuzzy controller and PID controller, calculate the temperature data of input, be able to control signal, the switching of each electrically operated valve and aperture size are controlled, realize the wall temperature of the heat exchange wall in flue gas waste heat recovery equipment always on acid dew point.
Accompanying drawing explanation
Fig. 1 is that hardware of the present utility model connects block diagram.
The specific embodiment
For convenience of the utility model is understood, existing in conjunction with Fig. 1 for an embodiment, the utility model is further illustrated.
Embodiment:
The utility model includes cabinet, fuzzy controller 1, PID controller 2, input terminal 4, lead-out terminal 5.
Described cabinet is provided with a plurality of input terminals 4, lead-out terminal 5;
Described input terminal 4 adopts PROFIBUS interface;
Described input terminal 4 is connected with the temperature sensor 3 being arranged on flue gas waste heat recovery equipment by signal cable;
Described input terminal is connected with fuzzy controller 1 by data cable;
Described fuzzy controller 1 is connected with PID controller 2 by data cable;
Described PID controller 2 is connected with a plurality of lead-out terminals 5 that are located on cabinet by cable;
Described lead-out terminal 5 is connected with each electrically operated valve 6 on flue gas waste heat recovery equipment by data cable.
Claims (1)
1. a control device for flue gas waste heat recovery equipment, is characterized in that: include cabinet, fuzzy controller, PID controller, input terminal, lead-out terminal, fuzzy controller, PID controller are all fixedly mounted in cabinet; Described cabinet is provided with a plurality of input terminals, lead-out terminal; Described input terminal adopts PROFIBUS interface; Described input terminal is connected with the temperature sensor being arranged on flue gas waste heat recovery equipment by signal cable; Described input terminal is connected with fuzzy controller by data cable; Described fuzzy controller is connected with PID controller by data cable; Described PID controller is connected with a plurality of lead-out terminals that are located on cabinet by cable; Described lead-out terminal is connected with each electrically operated valve on flue gas waste heat recovery equipment by data cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320498350.6U CN203454913U (en) | 2013-08-15 | 2013-08-15 | Control device of flue gas waste heat recovery equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320498350.6U CN203454913U (en) | 2013-08-15 | 2013-08-15 | Control device of flue gas waste heat recovery equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203454913U true CN203454913U (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320498350.6U Expired - Fee Related CN203454913U (en) | 2013-08-15 | 2013-08-15 | Control device of flue gas waste heat recovery equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN203454913U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110201467A (en) * | 2019-06-10 | 2019-09-06 | 吉林建筑大学 | A kind of air contaminant treatment flue gas waste heat recovery system and method |
-
2013
- 2013-08-15 CN CN201320498350.6U patent/CN203454913U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110201467A (en) * | 2019-06-10 | 2019-09-06 | 吉林建筑大学 | A kind of air contaminant treatment flue gas waste heat recovery system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140226 Termination date: 20160815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |