CN203454881U - Anticorrosive flue gas waste heat recovery system - Google Patents
Anticorrosive flue gas waste heat recovery system Download PDFInfo
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- CN203454881U CN203454881U CN201320498203.9U CN201320498203U CN203454881U CN 203454881 U CN203454881 U CN 203454881U CN 201320498203 U CN201320498203 U CN 201320498203U CN 203454881 U CN203454881 U CN 203454881U
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Abstract
The utility model discloses an anticorrosive flue gas waste heat recovery system which comprises a heat exchanger, a control device, a water storage tank, a hot water tank and a mixed water tank, wherein the heat exchanger is communicated with the water storage tank through one end of a pipeline, an electromagnetic valve connected with the control device is arranged on the pipeline, and the other end of the pipeline is communicated with a back flow tank; one end of the water storage tank is communicated with the heat exchanger, the other end of the water storage tank is communicated with the mixed water tank, and an electromagnetic valve connected with the control device is further arranged on the pipeline communicated with the mixed water tank; the mixed water tank is communicated with an external cold source through a pipeline, and an electromagnetic valve connected with the control device is further arranged on the pipeline; temperature sensors connected with the control device are respectively arranged in the heat exchanger, the water storage tank, the hot water tank and the mixed water tank. The anticorrosive flue gas waste heat recovery system provided by the utility model has a simple structure, is reasonable in design, can be adjusted to a corresponding temperature through proportionally blending a cold source and a back flow hot water under the control of the controller for heat exchange then, so as to enable the wall temperature of the heat exchanger to be higher than an acid dew point. Therefore, acid corrosion is prevented.
Description
Technical field
The utility model relates to a kind of residual heat using device, a kind ofly specifically can guarantee the residual neat recovering system of heat exchanger minimum wall temperature on acid dew point.
Background technology
Boiler actual motion exhaust gas temperature is often higher than design exhaust gas temperature, 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, also can reduce the power consumption cost of enterprise 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 mode and two kinds of modes of indirect heat exchange substantially.
No matter be direct heat transfer and indirect heat exchange equipment, all need to regulate low-temperature receiver water (demineralized water or condensate water) flow, control exhaust gas temperature, to guarantee that reducing exhaust gas temperature improves boiler efficiency.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 conditions, 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 is to provide the etch-proof flue gas waste heat recovery system of a kind of wall temperature that can make heat exchanger on acid dew point.
For achieving the above object, the technical scheme that the utility model adopts is: a kind of etch-proof flue gas waste heat recovery system, includes heat exchanger, control device, storage tank, boiler, mixed water tank.Heat exchanger is communicated with storage tank by pipeline one end, and the other end is communicated with reflux tank, and is provided with the magnetic valve being connected with control device on this pipeline; Described storage tank one end is communicated with heat exchanger, and the other end is communicated with mixed water tank, and the pipeline being communicated with mixed water tank is provided with the magnetic valve being connected with control device; Described mixed water tank is communicated with external source by pipeline, and is provided with the magnetic valve being connected with control device on this pipeline; In described heat exchanger, storage tank, boiler and mixed water tank, be also respectively equipped with the temperature sensor being connected with control device; Described control device includes PID controller, fuzzy controller.
The utility model is simple in structure, reasonable in design, carries out ratio and concocts to relevant temperature, then carry out heat exchange by cold source and backflow hot water under the control of controller, so that the wall surface temperature that carries out heat exchanger is higher than acid dew point, thereby prevents acid corrosion.
Accompanying drawing explanation
Fig. 1 is that hardware of the present utility model connects block diagram.
The specific embodiment
Now in conjunction with Fig. 1 for an embodiment, the utility model is described in further detail.
Embodiment:
The utility model includes heat exchanger, control device, storage tank, boiler, mixed water tank, low-temperature receiver enters mixed water tank 3 through sink temperature measuring point 1 and entrance control valve 2, after mixing with the backflow hot water that carrys out self heating water tank 10, enter storage tank 4, by storage tank 4, through storage tank leaving water temperature measuring point 5 and storage tank, go out water solenoid valve 6, enter heat exchanger 7, through isolating valve 9, enter boiler 10.In boiler 10, hot water divides two-way to flow out ，Yi road through reflux heat coolant-temperature gage measuring point 11, and recirculation water force (forcing) pump 12 enters mixed water tank 3, and the low outlet conduit that adds of final stage is got back to through condensate water force (forcing) pump 14, leaving water temperature measuring point 13 in another road.Equipment can pass through blowoff valve blowdown 8 after stopping transport; The temperature signal of sink temperature measuring point 1, water tank leaving water temperature measuring point 5, reflux heat coolant-temperature gage measuring point 11, leaving water temperature measuring point 13 accesses 16 PLC cabinets by signal cable, through input wires terminal, signal is inputted and in PLC module 15, is calculated storage; Output signal through respectively through signal cable send into entrance control valve 2, storage tank goes out water solenoid valve 6 executing agencies, perform an action and feed back aperture signal.
Claims (1)
1. an etch-proof flue gas waste heat recovery system, include heat exchanger, control device, storage tank, boiler, mixed water tank, it is characterized in that: heat exchanger is communicated with storage tank by pipeline one end, and on this pipeline, being provided with the magnetic valve being connected with control device, the other end is communicated with reflux tank; Described storage tank one end is communicated with heat exchanger, and the other end is communicated with mixed water tank, and the pipeline being communicated with mixed water tank is provided with the magnetic valve being connected with control device; Described mixed water tank is communicated with external source by pipeline, and is provided with the magnetic valve being connected with control device on this pipeline; In described heat exchanger, storage tank, boiler and mixed water tank, be also respectively equipped with the temperature sensor being connected with control device; Described control device includes PID controller, fuzzy controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320498203.9U CN203454881U (en) | 2013-08-15 | 2013-08-15 | Anticorrosive flue gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320498203.9U CN203454881U (en) | 2013-08-15 | 2013-08-15 | Anticorrosive flue gas waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203454881U true CN203454881U (en) | 2014-02-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320498203.9U Expired - Fee Related CN203454881U (en) | 2013-08-15 | 2013-08-15 | Anticorrosive flue gas waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203454881U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883392A (en) * | 2017-10-27 | 2018-04-06 | 北京中电联节能技术有限公司 | Feedforward neural network control method and system suitable for flue gas waste heat recovery apparatus |
| CN108279258A (en) * | 2017-01-05 | 2018-07-13 | 冯雨兰 | Residual heat from boiler fume utilizes Intelligent joint dynamic formula acid dew point TT＆C system |
| CN110486706A (en) * | 2019-08-09 | 2019-11-22 | 国电新能源技术研究院有限公司 | A kind of thermal power generation unit fume afterheat utilizes intelligence control system |
-
2013
- 2013-08-15 CN CN201320498203.9U patent/CN203454881U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279258A (en) * | 2017-01-05 | 2018-07-13 | 冯雨兰 | Residual heat from boiler fume utilizes Intelligent joint dynamic formula acid dew point TT＆C system |
| CN107883392A (en) * | 2017-10-27 | 2018-04-06 | 北京中电联节能技术有限公司 | Feedforward neural network control method and system suitable for flue gas waste heat recovery apparatus |
| CN110486706A (en) * | 2019-08-09 | 2019-11-22 | 国电新能源技术研究院有限公司 | A kind of thermal power generation unit fume afterheat utilizes intelligence control system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20160815 |