CN102371099A - Offline pulse back-blowing and ash-cleaning automatic control system - Google Patents
Offline pulse back-blowing and ash-cleaning automatic control system Download PDFInfo
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- CN102371099A CN102371099A CN2011103188413A CN201110318841A CN102371099A CN 102371099 A CN102371099 A CN 102371099A CN 2011103188413 A CN2011103188413 A CN 2011103188413A CN 201110318841 A CN201110318841 A CN 201110318841A CN 102371099 A CN102371099 A CN 102371099A
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Abstract
The invention relates to an offline pulse back-blowing and ash-cleaning automatic control system. According to the invention, a natural gas regulating valve is connected with a burner through a pipeline, the burner is connected with a ventilation pipeline, a blower is connected with a pipeline between the burner and the ventilation pipeline, and an automatic ignition device is connected with the burner through a circuit; a programmable controller is connected with a differential pressure meter through a circuit, one end of the differential pressure meter is connected with the smoke gas inlet end of a gas box pulse bag type dust remover, and the other end of the differential pressure meter is connected with the exhaust end of the gas box pulse bag type dust remover; the programmable controller is further connected with an automatic back-blowing and ash-cleaning device through a circuit, and the other end of a hoisting electromagnetic gas valve and the other end of a pulse electromagnetic gas valve are connected into the gas box pulse bag type dust remover; and a centrifugal exhaust fan comprises a regulating air valve, and the programmable controller is connected with the regulating air valve through a circuit. The offline pulse back-blowing and ash-cleaning automatic control system can avoid dust removal failure caused when ash is not cleaned in time under manual control, fully play the dust removal efficiency of the system; the replacement cost of vulnerable parts is reduced and the dew condensation failure of a filter bag is effectively preventd.
Description
Technical field
The present invention relates to the flue gas ash removal field, especially a kind of off-line pulse backblowing deashing automatic control system.
Background technology
Former MC type sack cleaner adopts " regularly " control " online ash removal ".Be the deduster work Chalk-dust filtering of the time bleeding on one side, regularly with compressed air take turns blowback on one side, remove dust from the filter bag surface.Be in the dust in the infall process, have the phenomenon of second adsorption, cause the resistance of deduster to increase gradually, inner pressure reduction raises, and dust catching efficiency descends.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art, a kind of off-line pulse backblowing deashing automatic control system is provided.
According to technical scheme provided by the invention; Said off-line pulse backblowing deashing automatic control system; Comprise ventilation shaft, air box impulse bag-type dust remover, centrifugal exhaust fan and aiutage; Ventilation shaft is connected with air box impulse bag-type dust remover, and air box impulse bag-type dust remover is connected with centrifugal exhaust fan through pipeline, and centrifugal exhaust fan is connected with aiutage through pipeline; Also be provided with Programmable Logic Controller, natural gas adjusting valve, burner, automatic ignition device, air blast, thermo detector, differential manometer, automatic back blow deashing device, promote electromagnetic gas valve, pulse electromagnetic air valve and regulate air-valve, the automatic ignition device that parallel connection is provided with is connected with Programmable Logic Controller through circuit with natural gas adjusting valve; With the blower conduits junction,, use then on the pipeline of pipeline junction before deduster again through burner; Automatic ignition device is connected through circuit with burner; Programmable Logic Controller is connected through circuit with thermo detector, on the ventilation shaft of the gas approach end position of thermo detector access air box impulse bag-type dust remover; Programmable Logic Controller is connected through circuit with differential manometer, and one of differential manometer terminates on the gas approach end of air box impulse bag-type dust remover, and the other end of differential manometer is connected on the exhaust end of air box impulse bag-type dust remover; Programmable Logic Controller also is connected through circuit with the automatic back blow deashing device; Lifting electromagnetic gas valve that parallel connection is provided with and pulse electromagnetic air valve insert the automatic back blow deashing device, promote the other end of electromagnetic gas valve and the other end of pulse electromagnetic air valve and insert air box impulse bag-type dust remover; Centrifugal exhaust fan has the adjusting air-valve, and Programmable Logic Controller also is connected through circuit with the adjusting air-valve.
The present invention can avoid giving full play to the efficiency of dust collection of system owing to the untimely dedusting fault that causes of Artificial Control deashing; Automatic ash removing has reduced resistance of the filter bag, prolongs its service life.The present invention has practiced thrift the consumable accessory replacement cost; The present invention has prevented the dewfall fault of filter bag effectively.
Description of drawings
Fig. 1 is a system principle diagram of the present invention.
The specific embodiment
Below in conjunction with concrete accompanying drawing and embodiment the present invention is described further.
As shown in the figure: this off-line pulse backblowing deashing automatic control system; Comprise ventilation shaft, air box impulse bag-type dust remover, centrifugal exhaust fan and aiutage; Ventilation shaft is connected with air box impulse bag-type dust remover; Air box impulse bag-type dust remover is connected with centrifugal exhaust fan by pipeline, and centrifugal exhaust fan is connected with aiutage by pipeline; Also be provided with Programmable Logic Controller (being PLC), natural gas adjusting valve, burner, automatic ignition device, air blast, thermo detector, differential manometer, automatic back blow deashing device, promote electromagnetic gas valve, pulse electromagnetic air valve and regulate air-valve; The automatic ignition device that is arranged in parallel is connected with Programmable Logic Controller by circuit with natural gas adjusting valve; Natural gas adjusting valve is connected by pipeline with burner; Burner inserts and ventilation shaft; Air blast inserts on the pipeline between burner and the ventilation shaft, and automatic ignition device is connected by circuit with burner; Programmable Logic Controller is connected by circuit with thermo detector, on the ventilation shaft of the gas approach end position of thermo detector access air box impulse bag-type dust remover; Programmable Logic Controller is connected by circuit with differential manometer, and one of differential manometer terminates on the gas approach end of air box impulse bag-type dust remover, and the other end of differential manometer is connected on the exhaust end of air box impulse bag-type dust remover; Programmable Logic Controller also is connected by circuit with the automatic back blow deashing device; Lifting electromagnetic gas valve that is arranged in parallel and pulse electromagnetic air valve insert the automatic back blow deashing device, promote the other end of electromagnetic gas valve and the other end of pulse electromagnetic air valve and insert air box impulse bag-type dust remover; Centrifugal exhaust fan has the adjusting air-valve, and Programmable Logic Controller also is connected by circuit with the adjusting air-valve.
During operate as normal, the flue gas in the dust shield inserts air box impulse bag-type dust remover through ventilation shaft, and air box impulse bag-type dust remover is handled the back and got into emptying in the aiutage through centrifugal exhaust fan.
When the flue-gas temperature that gets into air box impulse bag-type dust remover is lower than design temperature; Thermo detector sends signal to Programmable Logic Controller; Programmable Logic Controller makes the burner ignition through automatic ignition device; The unlatching size of Controlled by Programmable Controller natural gas adjusting valve, the hot blast after the burner combustion inserts ventilation shaft, and air blast inserts the air quantity that is used to control hot blast on the pipeline between burner and the ventilation shaft.
When the inlet and outlet pressure of air box impulse bag-type dust remover is lower than the setting pressure of differential manometer; Programmable Logic Controller starts the automatic back blow deashing device; Promote electromagnetic gas valve and make arbitrary gas tank of air box impulse bag-type dust remover that must deashing form independently gas tank, the pulse electromagnetic air valve makes the filter bag that is raised the independent gas tank that electromagnetic gas valve controls carry out reverse gas cleaning.
The level pressure timing automatic control, easy and simple to handle reliable, alleviate artificial burden.
The automatic control panel of Programmable Logic Controller is provided with the deduster internal differential pressure and shows and the safe operation demonstration, and whether being convenient to the operator, to understand dust pelletizing system ruuning situation normal.
Be convenient to service worker and understand trouble point and on-call maintenance.
Handle in the dust pelletizing system of hot and humid degree dust, in PLC is program control, also increased temperature control.It under design temperature to the heater heat supply of lighting a fire automatically.Avoid the filter bag dewfall, guarantee that dust pelletizing system normally moves.
Deduster is in operation, because dust constantly accumulation on the filter bag surface, its resistance increases, and inner pressure reduction increases, and when the deduster internal differential pressure reached setting value, the breakdown lift valve cut off and takes out dirt gas automatically; Compressed air carries out blowback through the pulsed electron valve according to predefined gassing time simultaneously.By " PLC " programme-control, carry out locellus and rotate reverse gas cleaning automatically.Reach the purpose of locellus automatic ash removing.
Be easy to generate dewfall phenomenon when filtering at the dusty gas of high-temperature high humility winter, and dust will be bonded in the filter bag surface, and easy-clear has not had a strong impact on its gas permeability, and destroyed whole dust pelletizing system and normally moved, even paralysis.Then in control of the present invention system, be provided with automatic temp controller.When the temperature before getting into deduster dropped to design temperature, the heating of can control heater lighting a fire was automatically sent into main ventilation pipeline and its heat energy loss of dirt air-flow mix supplement to high temperature air, guarantees that the mixed air temperature of deduster inside remains on more than the dew point.Prevented the dewfall fault of filter bag effectively.
Claims (1)
1. off-line pulse backblowing deashing automatic control system; Comprise ventilation shaft, air box impulse bag-type dust remover, centrifugal exhaust fan and aiutage; Ventilation shaft is connected with air box impulse bag-type dust remover; Air box impulse bag-type dust remover is connected with centrifugal exhaust fan by pipeline; Centrifugal exhaust fan is connected with aiutage by pipeline; It is characterized in that: also be provided with Programmable Logic Controller, natural gas adjusting valve, burner, automatic ignition device, air blast, thermo detector, differential manometer, automatic back blow deashing device, promote electromagnetic gas valve, pulse electromagnetic air valve and regulate air-valve, the automatic ignition device that is arranged in parallel is connected with Programmable Logic Controller by circuit with natural gas adjusting valve, and natural gas adjusting valve is connected by pipeline with burner; With the blower conduits junction,, use then on the pipeline of pipeline junction before deduster again through burner; Automatic ignition device is connected by circuit with burner; Programmable Logic Controller is connected by circuit with thermo detector, on the ventilation shaft of the gas approach end position of thermo detector access air box impulse bag-type dust remover; Programmable Logic Controller is connected by circuit with differential manometer, and one of differential manometer terminates on the gas approach end of air box impulse bag-type dust remover, and the other end of differential manometer is connected on the exhaust end of air box impulse bag-type dust remover; Programmable Logic Controller also is connected by circuit with the automatic back blow deashing device; Lifting electromagnetic gas valve that is arranged in parallel and pulse electromagnetic air valve insert the automatic back blow deashing device, promote the other end of electromagnetic gas valve and the other end of pulse electromagnetic air valve and insert air box impulse bag-type dust remover; Centrifugal exhaust fan has the adjusting air-valve, and Programmable Logic Controller also is connected by circuit with the adjusting air-valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103188413A CN102371099A (en) | 2011-10-20 | 2011-10-20 | Offline pulse back-blowing and ash-cleaning automatic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103188413A CN102371099A (en) | 2011-10-20 | 2011-10-20 | Offline pulse back-blowing and ash-cleaning automatic control system |
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| CN102371099A true CN102371099A (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103188413A Pending CN102371099A (en) | 2011-10-20 | 2011-10-20 | Offline pulse back-blowing and ash-cleaning automatic control system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338390A (en) * | 2014-10-10 | 2015-02-11 | 河南中源化学股份有限公司 | PLC based automatic bag dedusting control system and method |
| CN105021428A (en) * | 2015-07-06 | 2015-11-04 | 山东国电技术咨询有限公司 | Sampling purification dedusting device for denitration flue gas on-line monitoring system |
| CN105169828A (en) * | 2015-08-26 | 2015-12-23 | 邯郸新兴特种管材有限公司 | WINCC-based bag filter control system and control method |
| CN106246422A (en) * | 2016-08-18 | 2016-12-21 | 联诺欧机械科技江苏有限公司 | A kind of large-scale combustion engine gas handling system cleaning outfit |
| CN109603356A (en) * | 2019-01-25 | 2019-04-12 | 浙江蓝星环保设备有限公司 | Empty blowback bag-type dust collector and its dedusting control method are pressed in the passive heating of one kind |
| CN110917750A (en) * | 2019-12-05 | 2020-03-27 | 华北电力科学研究院有限责任公司 | Bag-type dust removing method and device of bag-type dust remover |
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| US4411674A (en) * | 1981-06-02 | 1983-10-25 | Ohio Blow Pipe Co. | Continuous clean bag filter apparatus and method |
| JPH05184834A (en) * | 1992-01-13 | 1993-07-27 | Kawasaki Steel Corp | Filter cleaning device for bag filter |
| CN2929612Y (en) * | 2005-12-30 | 2007-08-01 | 武汉景弘环保科技有限公司 | Bag type dust removing system for drying device |
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| CN201969438U (en) * | 2011-01-18 | 2011-09-14 | 江苏康洁环境工程有限公司 | Chambered pulse back-flushing bag type dust collector |
| CN202289762U (en) * | 2011-10-20 | 2012-07-04 | 无锡市西漳环保设备有限公司 | Automatic control system for offline pulse back-flushing dust removal |
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2011
- 2011-10-20 CN CN2011103188413A patent/CN102371099A/en active Pending
Patent Citations (8)
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| US4411674A (en) * | 1981-06-02 | 1983-10-25 | Ohio Blow Pipe Co. | Continuous clean bag filter apparatus and method |
| JPH05184834A (en) * | 1992-01-13 | 1993-07-27 | Kawasaki Steel Corp | Filter cleaning device for bag filter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338390A (en) * | 2014-10-10 | 2015-02-11 | 河南中源化学股份有限公司 | PLC based automatic bag dedusting control system and method |
| CN105021428A (en) * | 2015-07-06 | 2015-11-04 | 山东国电技术咨询有限公司 | Sampling purification dedusting device for denitration flue gas on-line monitoring system |
| CN105169828A (en) * | 2015-08-26 | 2015-12-23 | 邯郸新兴特种管材有限公司 | WINCC-based bag filter control system and control method |
| CN106246422A (en) * | 2016-08-18 | 2016-12-21 | 联诺欧机械科技江苏有限公司 | A kind of large-scale combustion engine gas handling system cleaning outfit |
| CN106246422B (en) * | 2016-08-18 | 2019-11-29 | 联诺欧机械科技江苏有限公司 | A kind of large size combustion engine gas handling system cleaning outfit |
| CN109603356A (en) * | 2019-01-25 | 2019-04-12 | 浙江蓝星环保设备有限公司 | Empty blowback bag-type dust collector and its dedusting control method are pressed in the passive heating of one kind |
| CN110917750A (en) * | 2019-12-05 | 2020-03-27 | 华北电力科学研究院有限责任公司 | Bag-type dust removing method and device of bag-type dust remover |
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Application publication date: 20120314 |