CN203275950U - Flue gas waste heat recovery control system - Google Patents
Flue gas waste heat recovery control system Download PDFInfo
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- CN203275950U CN203275950U CN 201320226345 CN201320226345U CN203275950U CN 203275950 U CN203275950 U CN 203275950U CN 201320226345 CN201320226345 CN 201320226345 CN 201320226345 U CN201320226345 U CN 201320226345U CN 203275950 U CN203275950 U CN 203275950U
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- flue gas
- monitoring device
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- temperature
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Abstract
The utility model discloses a flue gas waste heat recovery control system which comprises a steam-water module, a flue gas module, a PLC control cabinet and a remote I/O cabinet, wherein the steam-water module comprises a booster pump control cabinet, a flow monitoring device, a heat exchanger inlet water temperature monitoring device, an internal circulation inlet water flow monitoring device, a heat exchanger outlet water temperature monitoring device, a riser tube temperature monitoring device, a downcomer temperature monitoring device and a wall temperature monitoring device; all devices in the steam-water module and the flue gas module are connected with the remote I/O cabinet through a data bus; and the remote I/O cabinet is connected with the PLC control cabinet through the data bus. Compared with the traditional technology, the flue gas waste heat recovery control system is advantageous in that analog signals acquired by on-site measuring devices are sent to the PLC cabinet by the control system to be calculated and processed, and then operation parameters are adjusted automatically; and exhaust gas temperature is furthest reduced, and simultaneously low-temperature corrosion is prevented.
Description
Technical field
The utility model relates to the control of heat reclamation device, specifically a kind of system for flue gas waste heat recovery control.
Background technology
The high-temperature flue gas of boiler back end ductwork discharging not only causes a large amount of wastings of resources, and atmospheric environment is produced thermal pollution, and under the situation of current energy-saving and emission-reduction, a lot of enterprises have carried out the flue gas waste heat recovery retrofit work.
At present, aspect the flue gas waste heat recovery heat metering, the calculating of flue gas waste heat recovery amount of energy saving in existing flue gas waste heat recovery regulating device is all by original service data, draws in conjunction with computing formula.Yet in the actual motion of boiler, the relevant datas such as the exhaust gas volumn of boiler heat source, exhaust gas temperature are all constantly to change, and the amount of energy saving that in the past calculated according to design formula can't be realized measuring accurately.
Aspect flue gas waste heat recovery equipment anticorrosion control, existing flue gas waste heat recovery system adopts the upper header temperature to control mostly, makes the lower collecting box temperature higher than acid dew point, thereby avoids flue gas waste heat recovery equipment not to be subjected to cold end corrosion.But lower collecting box temperature itself there are differences with the minimum wall temperature temperature, and in upper header adjustment process, lower collecting box temperature-responsive speed is slower, to such an extent as to produce the outer wall temperature transfer lag that is inconjunction with.When boiler load changed, flue gas heat-exchange unit was before the lower collecting box temperature is again stable, and the risk of cold end corrosion and regional etch will occur heat transmission equipment.
Therefore, need a kind of operating mode detection, metering and automatic control technology of novel powerful flue gas waste heat recovery system, each relevant service data that flue gas waste heat recovery system constantly changes is carried out processing in real time and calculating accurately amount of energy saving.
The utility model content
The purpose of this utility model is to overcome existing deficiency in prior art, provides a kind of and can reduce to greatest extent exhaust gas temperature, promotes the waste heat recovery amount, prevents simultaneously the flue gas waste heat recovery control system of cold end corrosion.
For achieving the above object, the utility model adopts following technical proposals.
A kind of flue gas waste heat recovery control system comprises carbonated drink module, flue gas module, PLC switch board and remote I/O cabinet.
Described carbonated drink module comprises supercharge pump switch board, flow monitoring device, heat exchanger entrance water temperature detection device, interior circulation flow of inlet water monitoring device, heat exchanger exit water temperature detection device, tedge device for detecting temperature, downtake device for detecting temperature, wall temperature monitoring device.
Described supercharge pump switch board comprises protective device, on the spot/long-range change-over switch, current signal shows and remote transmission device on the spot on the spot.On the spot described/long-range change-over switch is namely switching to when long-range, provides the monitoring software system remote to control supercharge pump start/stop function.
Described wall temperature monitoring device is that wall is welded on outside the heat exchanger tube of cold junction, and its outer wall temperature is as being main contral parameter, and outer wall temperature goal-setting value makes waste heat recovery apparatus not be subjected to cold end corrosion all the time higher than acid dew point.
Described flue gas module comprises entrance flue gas temperature monitoring device, inlet flue gas static pressure pressure monitoring device, outlet flue gas static pressure pressure monitoring device, exit gas temperature monitoring device, flue gas flow monitoring device.
Each device in described carbonated drink module and flue gas module all is connected with the remote I/O cabinet by data bus.
Described remote I/O cabinet is connected with the PLC switch board by data bus.
The utility model is compared with conventional art, it is advantageous that: by control system, the analog signals of on-the-spot each measurement mechanism collection is delivered to the PLC cabinet and carry out after computing, operational factor being regulated automatically, reduce to greatest extent exhaust gas temperature, prevented simultaneously cold end corrosion.
Description of drawings
Fig. 1 is the structural representation that the utility model is connected with flue gas waste heat recovery apparatus.
Embodiment
Further understand for convenience of the utility model is done, existing in conjunction with Fig. 1 for an embodiment.
Embodiment:
Low-temperature receiver flow through system entry stop valve 1, flow through supercharge pump entrance isolation valve 2, supercharge pump 3, after supercharge pump 3 pressurizations,, supercharge pump outlet isolation valve 4, supercharge pump outlet non-return valve 5, flow monitoring device 10, heat exchanger entrance water temperature detection device 11, variable valve entrance isolation valve 13, ZAZP type electric control valve 14, after regulating the low-temperature receiver flow by motorized adjustment valve opening size variation, enter vapor-water heat exchanger tube side 33 through motorized adjustment valve outlet port isolation valve 15 and carry out heat interchange, low-temperature receiver is heated to be hot water.Hot water imports desalination jellyfish pipe by warm heat exchanger exit water temperature detection device 34, flowing water Valve 35, outlet shutoff valve 36.Stand-by pump entrance isolation valve 6, stand-by pump 7, stand-by pump outlet isolation valve 8 and stand-by pump outlet non-return valve 9 can replace operation when supercharge pump damages, bypass water intaking valve 16 can replace water inlet when electric control valve damages.
Internal circulation heat-exchanging medium demineralized water undergoes phase transition through rising pipeline section 30, tedge device for detecting temperature 29 in flue gas heat-exchange unit 25 endotherm sections absorption flue gas heat and enters vapor-water heat exchanger 33, after carrying out heat interchange with low-temperature receiver, condensation liquefaction drops to fume side heat interchanger 25 through decline pipeline section 22, downtake device for detecting temperature 21, wall temperature monitoring device 20, heat absorption undergoes phase transition again, completes a circulation.
The porch flue gas is through entrance flue gas temperature monitoring device 23, inlet flue gas static pressure pressure monitoring device 24, flue gas heat-exchange unit 25, outlet static pressure pressure monitoring device 26, exit gas temperature monitoring device 27, flue gas flow monitoring device 28 before heat interchanger.
System is provided with draining valve 12, blowoff valve 19 at the lower position place, and the place is provided with vent valve 31 in the high position, and interior circulation water intaking valve 17, flow of inlet water monitoring device 18, tensimeter 32 on the spot, in order to debugging, start or stop transport and use.
During work, wall temperature monitoring device 20 thermopairs are electric signal with the wall temperature temperature transition, be passed to remote I/O cabinet 37 through signal cable, enter PLC switch board 38 by fieldbus, carry out computing and processing through the PLC module, the output quantity that produces through PLC switch board 38, remote I/O cabinet 37, be input to electric control valve 14, by electric control valve 14 controlling opening of valve, and the aperture signal is fed back to the PLC module by former road.Supercharge pump switch board 40 can carry out on the spot/long-range blocked operation, show on the spot the supercharge pump running current, also signal can be delivered to PLC switch board 38, simultaneously, be input to the signal 38 of PLC switch board, the operator can call by control terminal 39 and check operational factor, and carries out parameter modification, by PLC switch board output 38, topworks completes with controlled quentity controlled variable.
Claims (2)
1. a flue gas waste heat recovery control system, is characterized in that: comprise carbonated drink module, flue gas module, PLC switch board and remote I/O cabinet; Described carbonated drink module comprises supercharge pump switch board, flow monitoring device, heat exchanger entrance water temperature detection device, interior circulation flow of inlet water monitoring device, heat exchanger exit water temperature detection device, tedge device for detecting temperature, downtake device for detecting temperature, wall temperature monitoring device; Described supercharge pump switch board comprises protective device, on the spot/long-range change-over switch, current signal shows and remote transmission device on the spot on the spot; Described flue gas module comprises entrance flue gas temperature monitoring device, inlet flue gas static pressure pressure monitoring device, outlet flue gas static pressure pressure monitoring device, exit gas temperature monitoring device, flue gas flow monitoring device; Each device in described carbonated drink module and flue gas module all is connected with the remote I/O cabinet by data bus; Described remote I/O cabinet is connected with the PLC switch board by data bus.
2. a kind of flue gas waste heat recovery control system as described in claim 1, it is characterized in that: described wall temperature monitoring device, wall is welded on outside the heat exchanger tube of cold junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320226345 CN203275950U (en) | 2013-04-28 | 2013-04-28 | Flue gas waste heat recovery control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320226345 CN203275950U (en) | 2013-04-28 | 2013-04-28 | Flue gas waste heat recovery control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203275950U true CN203275950U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320226345 Expired - Fee Related CN203275950U (en) | 2013-04-28 | 2013-04-28 | Flue gas waste heat recovery control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315916A (en) * | 2014-10-23 | 2015-01-28 | 机械工业第六设计研究院有限公司 | Electronic control system of waste heat recovery |
| CN104748996A (en) * | 2015-04-16 | 2015-07-01 | 山东大学 | Stimulation test apparatus and method of dynamic response of power plant exhaust waste heat utilization system |
| CN113028382A (en) * | 2021-03-25 | 2021-06-25 | 上海东润换热设备股份有限公司 | Self-temperature-control anticorrosion waste heat recovery device and boiler system |
| CN114110638A (en) * | 2021-11-26 | 2022-03-01 | 西安热工研究院有限公司 | Automatic regulating system and method for efficient flue gas waste heat utilization of air preheater bypass |
| CN115031255A (en) * | 2022-06-24 | 2022-09-09 | 新地能源工程技术有限公司 | Flue gas recycling device of micro-gas turbine combined heat and power generation system |
-
2013
- 2013-04-28 CN CN 201320226345 patent/CN203275950U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315916A (en) * | 2014-10-23 | 2015-01-28 | 机械工业第六设计研究院有限公司 | Electronic control system of waste heat recovery |
| CN104315916B (en) * | 2014-10-23 | 2016-03-30 | 机械工业第六设计研究院有限公司 | Heat recovery electric-control system |
| CN104748996A (en) * | 2015-04-16 | 2015-07-01 | 山东大学 | Stimulation test apparatus and method of dynamic response of power plant exhaust waste heat utilization system |
| CN104748996B (en) * | 2015-04-16 | 2018-05-15 | 山东大学 | Power plant's smoke discharging residual heat utilizes system Dynamic Response Simulation experimental apparatus for testing and method |
| CN113028382A (en) * | 2021-03-25 | 2021-06-25 | 上海东润换热设备股份有限公司 | Self-temperature-control anticorrosion waste heat recovery device and boiler system |
| CN114110638A (en) * | 2021-11-26 | 2022-03-01 | 西安热工研究院有限公司 | Automatic regulating system and method for efficient flue gas waste heat utilization of air preheater bypass |
| CN114110638B (en) * | 2021-11-26 | 2024-01-19 | 西安热工研究院有限公司 | Automatic regulating system and method for efficient flue gas waste heat utilization of bypass of air preheater |
| CN115031255A (en) * | 2022-06-24 | 2022-09-09 | 新地能源工程技术有限公司 | Flue gas recycling device of micro-gas turbine combined heat and power generation 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 |
Granted publication date: 20131106 Termination date: 20160428 |