CN108379968A - A kind of control system and method for bag filter - Google Patents
A kind of control system and method for bag filter Download PDFInfo
- Publication number
- CN108379968A CN108379968A CN201810201228.5A CN201810201228A CN108379968A CN 108379968 A CN108379968 A CN 108379968A CN 201810201228 A CN201810201228 A CN 201810201228A CN 108379968 A CN108379968 A CN 108379968A
- Authority
- CN
- China
- Prior art keywords
- bag filter
- valve
- plc controller
- oxygen concentration
- bag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/448—Auxiliary equipment or operation thereof controlling filtration by temperature measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of control system of bag filter and methods, the system includes temperature sensor, differential pressure pick-up, oxygen concentration sensor and PLC controller, temperature sensor is mounted on inside import air duct and is connect with PLC controller input end signal, the top that differential pressure pick-up is mounted on bag filter is connect with PLC controller input end signal, oxygen concentration sensor is mounted on inside steelmaking converter and is connect with PLC controller input end signal, the output port of PLC controller is separately connected the Off-line valve of bag filter, by-passing valve, it is blown pulse valve, dedusting fan and dedusting valve mounted on steelmaking converter exhanst gas outlet.The present invention has the advantages that detect and automatically control automatically, can ensure entirely to produce normal orderly progress, and flue gas emission is in order.
Description
Technical field
The present invention relates to a kind of control system of bag filter and methods, and in particular to one kind being used for steelmaking converter flue gas
The control system and method for bag filter in dust pelletizing system belong to steelmaking converter smoke dust-removing equipment technical field.
Background technology
Steelmaking converter refers to oxygen top-blown converter, contains top and bottom combined blown converter, and blast-melted progress converter both at home and abroad at present is blown
Oxygen steel-making has become main process for making.The high-temp waste gas that about 1450 DEG C are generated during bessemerizing, in converter, contains
A large amount of dust, dust content is up to 150-200g/Nm3, could be discharged after need to being dusted.
Bag filter has obtained extensive profit as a kind of convenient smoke dust-removing equipment in converter dedusting line
With.But existing bag filter control is essentially all specifically to be beaten what cleaner was timed according to timing controlled
It opens and is dusted control, can not the parameters such as temperature, pressure difference in cloth bag be carried out with good monitoring and controlling, and converter gas tool
There is the features such as high temperature, toxic, inflammable and explosive, dustiness is high, easily cloth bag is damaged, influences the use of bag-type dust, therefore
It needs to be improved the control method and system of bag filter.
Invention content
In view of this, in view of the deficiencies of the prior art, the present invention provides a kind of in steelmaking converter flue gas dust collecting system
Bag filter control system and method, can not well monitor Dedusting Methods in cloth bag to solve existing bag filter
Problem.
In order to solve the above technical problems, the technical scheme is that using a kind of control system of bag filter, it
Including temperature sensor, differential pressure pick-up, oxygen concentration sensor and PLC controller, temperature sensor is mounted on import air duct
Inside is connect with PLC controller input end signal, and differential pressure pick-up is mounted on the top of bag filter and PLC controller inputs
End signal connects, and oxygen concentration sensor is mounted on inside steelmaking converter and is connect with PLC controller input end signal, PLC controls
The output port of device is separately connected the Off-line valve of bag filter, by-passing valve, is blown pulse valve, dedusting fan and mounted on refining
The dedusting valve of steel converter exhanst gas outlet.
Further, the coil of the output port connection relay of the PLC controller, the Off-line valve, by-passing valve, spray
It blows pulse valve, dedusting fan, dedusting valve and power supply is connected by the normally opened contact of relay respectively.
Further, the temperature sensor is arranged close to inside the import air duct of bag filter air inlet.
Further, the differential pressure pick-up is mounted on the outside at the top of bag filter.
Simultaneously the present invention also provides a kind of control method using above-mentioned bag filter control system, it includes following
Step：
(1) signal detection：Temperature sensor is detected the flue-gas temperature for entering bag filter, differential pressure pick-up pair
The inlet outlet pressure differential of bag filter is detected, and oxygen concentration sensor is detected the oxygen concentration in steelmaking converter；
(2) signal compares：PLC controller receive the temperature signal of temperature sensor, differential pressure pick-up pressure difference signal and
The oxygen concentration signals of oxygen concentration sensor, and be compared with setting value, see it whether near or above setting value；
(3) it acts：
A. when temperature is beyond or below setting value, PLC controller controls Off-line valve and closes, and by-passing valve is opened, and flue gas is forbidden
Into the baghouse of bag filter；
B. when differential pressure exceeds setting value, PLC controller controls Off-line valve and closes, and injection pulse valve is opened, and executes cloth bag and removes
Dirt；
C.PLC controllers control the air quantity of the aperture and dedusting fan of dedusting valve according to the oxygen concentration of reception.
In general, bag filter is both provided with multiple baghouses, when bag filter is provided with multiple baghouses, on
State closed in step (3) A Off-line valve be from apart from the proximal end of inlet air stack entrance to distally closing successively；Open Off-line valve be from
Apart from the proximal end of inlet air stack entrance to distally opening successively.In this way, the either flue gas of higher temperature or lower temperature
Flue gas is controlled in time by the Off-line valve of entrance most proximal end.
When bag filter is provided with multiple baghouses, the deashing action of baghouse is interval deashing, the specially described step
Suddenly the indoor Off-line valve of each filter bag is controlled in (3) B successively and is blown the opening and closing of pulse valve, interval time is 10~20s.
Compared with prior art, the beneficial effects of the present invention are：Monitored by flue-gas temperature, PLC controller control from
The opening and closing of line valve and by-passing valve, avoids high-temperature flue gas from entering baghouse damage filter bag, and low-temperature flue gas enters baghouse and generates moisture condensation
Phenomena impair dust removing effects；It is monitored by pressure difference, PLC controller controls Off-line valve and the opening and closing for being blown pulse valve, realizes cloth
Bag dust collector filter bag ash removal automatically controls, and improves the cleaning efficiency of filter bag, extends the service life of filter bag；Pass through steel-making
Oxygen concentration monitoring in converter, and then the working condition in converter is reflected, the yield of high-temperature flue gas, to make PLC control
The corresponding rotating speed of the corresponding aperture and dedusting fan of device control dedusting valve processed, realizes the purpose of energy-saving and frequency-variable.
In conclusion control system provided by the invention and control method can protect the filter bag of bag filter from height
The influence of temperature or low temperature；Filter bag ash removal is timely, and cleaning efficiency is high；Dedusting valve and dedusting fan are controlled with the interlocking of converter working condition
System, effectively saves electric energy.The present invention has the advantages that detect and automatically control automatically, can ensure entirely to produce it is normal orderly into
Row, and flue gas emission is in order.
Description of the drawings
Fig. 1 is the structure diagram of control system of the present invention.
Specific implementation mode
It is below in conjunction with the accompanying drawings and preferred real in order to make those skilled in the art more fully understand technical scheme of the present invention
Applying mode, the present invention is described in further detail.
Referring to Fig. 1, the present invention provides a kind of control systems of bag filter, it includes temperature sensor, differential pressure biography
Sensor, oxygen concentration sensor and PLC controller, temperature sensor are mounted on inside import air duct and PLC controller input terminal
Signal connects, and the top that differential pressure pick-up is mounted on bag filter is connect with PLC controller input end signal, and oxygen concentration passes
Sensor is mounted on inside steelmaking converter and is connect with PLC controller input end signal, and the output port of PLC controller is separately connected cloth
Off-line valve, by-passing valve, injection pulse valve, dedusting fan and the dust removing valve mounted on steelmaking converter exhanst gas outlet of bag dust collector
Door.
Further, the coil of the output port connection relay of the PLC controller, the Off-line valve, by-passing valve, spray
It blows pulse valve, dedusting fan, dedusting valve and power supply is connected by the normally opened contact of relay respectively.
Further, the temperature sensor is arranged close to inside the import air duct of bag filter air inlet.
Further, the differential pressure pick-up is mounted on the outside at the top of bag filter.
Above-mentioned temperature sensor is for being detected the flue-gas temperature in air duct；Differential pressure pick-up is used for bag-type dust
The inlet outlet pressure differential of device is detected；Oxygen concentration sensor passes through for being detected to the oxygen concentration in steelmaking converter
Oxygen concentration in steelmaking converter carrys out the working condition in reaction converter；PLC controller is for comparing signal, judging to send out
Go out to control signal；Off-line valve is used to open or closes the gas circuit into bag filter baghouse, is generally carried with vertically arranged
Lift valve is in the majority；The effect of by-passing valve is that flue gas is made without cloth bag to drain；Pulse valve is blown using compressed air to baghouse
Cloth bag carry out deashing operation；Dedusting fan is the power resources of bag filter.
Embodiment 1 (bag filter is two chamber structures)：
A kind of control method of steelmaking converter flue gas dust collecting system bag filter, includes the following steps：
(1) signal detection：Temperature sensor is detected the flue-gas temperature for entering bag filter, differential pressure pick-up pair
The inlet outlet pressure differential of bag filter is detected, and oxygen concentration sensor is detected the oxygen concentration in steelmaking converter；
(2) signal compares：PLC controller receive the temperature signal of temperature sensor, differential pressure pick-up pressure difference signal and
The oxygen concentration signals of oxygen concentration sensor, and be compared with setting value, see it whether near or above setting value；
(3) it acts：
A. when temperature is beyond or below setting value, PLC controller closes the Off-line valve in No. 1 storehouse and No. 2 storehouses successively, opens other
Port valve forbids flue gas to enter the baghouse of bag filter；
B. when differential pressure exceeds setting value, the bag-type dust in No. 1 storehouse is first carried out in PLC controller, and No. 2 storehouses are still normally carried out and remove
Dirt works：The Off-line valve in No. 1 storehouse is closed, injection pulse valve is opened, No. 2 storehouses is switched to after executing bag-type dust 20s, closes No. 2
The Off-line valve in storehouse opens injection pulse valve, No. 1 storehouse is switched to again after 20s, and operation is until pressure difference restores normal repeatedly；
C.PLC controllers control the air quantity of the aperture and dedusting fan of dedusting valve according to the oxygen concentration of reception.
Embodiment 2 (bag filter is three chamber structures)：
A kind of control method of steelmaking converter flue gas dust collecting system bag filter, includes the following steps：
(1) signal detection：Temperature sensor is detected the flue-gas temperature for entering bag filter, differential pressure pick-up pair
The inlet outlet pressure differential of bag filter is detected, and oxygen concentration sensor is detected the oxygen concentration in steelmaking converter；
(2) signal compares：PLC controller receive the temperature signal of temperature sensor, differential pressure pick-up pressure difference signal and
The oxygen concentration signals of oxygen concentration sensor, and be compared with setting value, see it whether near or above setting value；
(3) it acts：
A. when temperature is beyond or below setting value, PLC controller closes the Off-line valve in No. 1 storehouse, No. 2 storehouses and No. 3 storehouses successively,
By-passing valve is opened, flue gas is forbidden to enter the baghouse of bag filter；
B. when differential pressure exceeds setting value, the bag-type dust in No. 1 storehouse is first carried out in PLC controller, and No. 2 storehouses and No. 3 storehouses are still just
Often it is dusted work：The Off-line valve in No. 1 storehouse is closed, injection pulse valve is opened, No. 2 storehouses is switched to after executing bag-type dust 10s,
No. 1 storehouse and No. 3 storehouses are normally carried out dedusting work；The Off-line valve in No. 2 storehouses is closed, injection pulse valve is opened, 3 is switched to again after 10s
Number storehouse, No. 1 storehouse and No. 2 storehouses are normally carried out dedusting work；The Off-line valve in No. 3 storehouses is closed, injection pulse valve is opened, is cut again after 10s
No. 1 storehouse is changed to, No. 2 storehouses and No. 3 storehouses are normally carried out dedusting work；Operation is until pressure difference restores normal repeatedly；
C.PLC controllers control the air quantity of the aperture and dedusting fan of dedusting valve according to the oxygen concentration of reception.
In conclusion the present invention is monitored by flue-gas temperature, PLC controller controls the opening and closing of Off-line valve and by-passing valve, keeps away
Exempt from high-temperature flue gas and enter baghouse damage filter bag, low-temperature flue gas enters baghouse and generates dew condensation phenomenon influence dust removing effects；Pass through
Pressure difference monitors, and PLC controller controls Off-line valve and the opening and closing for being blown pulse valve, realizes the automatic of bag filter filter bag ash removal
Control, improves the cleaning efficiency of filter bag, extends the service life of filter bag；It is monitored by the oxygen concentration in steelmaking converter,
And then the working condition in converter is reflected, the yield of high-temperature flue gas, to make PLC controller control the corresponding of dedusting valve
The corresponding rotating speed of aperture and dedusting fan, realizes the purpose of energy-saving and frequency-variable.
It should be pointed out that above preferred embodiment is not construed as limitation of the present invention, protection scope of the present invention is answered
When being subject to claim limited range.For those skilled in the art, the present invention is not being departed from
Spirit and scope in, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the present invention protection model
It encloses.
Claims (8)
1. a kind of control system of bag filter, it is characterised in that：Including temperature sensor, differential pressure pick-up, oxygen concentration
Sensor and PLC controller, temperature sensor are mounted on inside import air duct and are connect with PLC controller input end signal, differential pressure
The top that sensor is mounted on bag filter is connect with PLC controller input end signal, and oxygen concentration sensor is mounted on refining
Connect with PLC controller input end signal inside steel converter, the output port of PLC controller be separately connected bag filter from
Line valve, by-passing valve, injection pulse valve, dedusting fan and the dedusting valve mounted on steelmaking converter exhanst gas outlet.
2. a kind of control system of bag filter according to claim 1, it is characterised in that：The PLC controller
Output port connects the coil of relay, and the Off-line valve, by-passing valve, injection pulse valve, dedusting fan, dedusting valve lead to respectively
Cross the normally opened contact connection power supply of relay.
3. a kind of control system of bag filter according to claim 1, it is characterised in that：The temperature sensor peace
It is installed adjacent to inside the import air duct of bag filter air inlet.
4. a kind of control system of bag filter according to claim 1, it is characterised in that：The differential pressure pick-up peace
Outside at the top of bag filter.
5. a kind of control method of control system using the bag filter described in any one of any one of claims 1 to 44, feature
It is：This approach includes the following steps：
(1) signal detection：Temperature sensor is detected the flue-gas temperature for entering bag filter, and differential pressure pick-up is to cloth bag
The inlet outlet pressure differential of deduster is detected, and oxygen concentration sensor is detected the oxygen concentration in steelmaking converter；
(2) signal compares：PLC controller receives the pressure difference signal and oxygen of the temperature signal of temperature sensor, differential pressure pick-up
The oxygen concentration signals of concentration sensor, and be compared with setting value, see it whether near or above setting value；
(3) it acts：
A. when temperature is beyond or below setting value, PLC controller controls Off-line valve and closes, and by-passing valve is opened, and flue gas is forbidden to enter
The baghouse of bag filter；
B. when differential pressure exceeds setting value, PLC controller controls Off-line valve and closes, and injection pulse valve is opened, and bag-type dust is executed；
C.PLC controllers control the air quantity of the aperture and dedusting fan of dedusting valve according to the oxygen concentration of reception.
6. a kind of control method of bag filter according to claim 5, it is characterised in that：When bag filter is arranged
Have multiple baghouses, closed in step (3) A Off-line valve be from apart from the proximal end of inlet air stack entrance to distally closing successively
It closes；Open Off-line valve be from apart from the proximal end of inlet air stack entrance to distally opening successively.
7. a kind of control method of bag filter according to claim 5, it is characterised in that：When bag filter is arranged
There are multiple baghouses, control the indoor Off-line valve of each filter bag in step (3) B successively and is blown the opening and closing of pulse valve.
8. a kind of control method of bag filter according to claim 7, it is characterised in that：In each baghouse
Off-line valve and injection pulse valve opening and closing interval time be 10~20s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810201228.5A CN108379968B (en) | 2018-03-12 | 2018-03-12 | Control system and method of bag-type dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810201228.5A CN108379968B (en) | 2018-03-12 | 2018-03-12 | Control system and method of bag-type dust collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108379968A true CN108379968A (en) | 2018-08-10 |
| CN108379968B CN108379968B (en) | 2021-03-19 |
Family
ID=63067597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810201228.5A Active CN108379968B (en) | 2018-03-12 | 2018-03-12 | Control system and method of bag-type dust collector |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109173462A (en) * | 2018-10-10 | 2019-01-11 | 新中天环保股份有限公司 | A kind of low pressure is in wire length bag pulse bag-type dust-removing device |
| CN111298537A (en) * | 2020-04-02 | 2020-06-19 | 盐城市顺源环保设备有限公司 | Potash fertilizer drying waste gas treatment process |
| CN112076554A (en) * | 2020-09-14 | 2020-12-15 | 中北大学 | Dust-explosion-proof dust removal equipment for workshop |
| CN112316584A (en) * | 2020-10-22 | 2021-02-05 | 沃尔士环控系统工程(深圳)有限公司 | Chamber differential pressure closed-loop ash removal control system and method applied to bag-type dust collector |
| CN112596433A (en) * | 2020-12-10 | 2021-04-02 | 广西金川有色金属有限公司 | Control system and method for multi-zone dispersed multi-bag dust collector |
| CN113680159A (en) * | 2021-08-27 | 2021-11-23 | 济南环陶环保工程有限公司 | Bag-type dust collector back-blowing control method suitable for dry quenching environment dust removal system |
| CN114063579A (en) * | 2021-11-01 | 2022-02-18 | 青岛天人环境股份有限公司 | Industrial internet deodorization edge synergy micro-platform equipment |
| CN117258442A (en) * | 2023-11-23 | 2023-12-22 | 湖南洁滤环保科技有限公司 | A prevent sticking with paste bag control system for sack cleaner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109173462A (en) * | 2018-10-10 | 2019-01-11 | 新中天环保股份有限公司 | A kind of low pressure is in wire length bag pulse bag-type dust-removing device |
| CN111298537A (en) * | 2020-04-02 | 2020-06-19 | 盐城市顺源环保设备有限公司 | Potash fertilizer drying waste gas treatment process |
| CN112076554A (en) * | 2020-09-14 | 2020-12-15 | 中北大学 | Dust-explosion-proof dust removal equipment for workshop |
| CN112316584A (en) * | 2020-10-22 | 2021-02-05 | 沃尔士环控系统工程(深圳)有限公司 | Chamber differential pressure closed-loop ash removal control system and method applied to bag-type dust collector |
| CN112596433A (en) * | 2020-12-10 | 2021-04-02 | 广西金川有色金属有限公司 | Control system and method for multi-zone dispersed multi-bag dust collector |
| CN113680159A (en) * | 2021-08-27 | 2021-11-23 | 济南环陶环保工程有限公司 | Bag-type dust collector back-blowing control method suitable for dry quenching environment dust removal system |
| CN114063579A (en) * | 2021-11-01 | 2022-02-18 | 青岛天人环境股份有限公司 | Industrial internet deodorization edge synergy micro-platform equipment |
| CN117258442A (en) * | 2023-11-23 | 2023-12-22 | 湖南洁滤环保科技有限公司 | A prevent sticking with paste bag control system for sack cleaner |
| CN117258442B (en) * | 2023-11-23 | 2024-02-02 | 湖南洁滤环保科技有限公司 | A prevent sticking with paste bag control system for sack cleaner |
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