KR102139146B1 - Filter dust collector and Control method of bag filter pulsing of filter dust collector - Google Patents

Abstract

Filtration dust collectors are disclosed. The filtration dust collector of the present invention is a filter dust collector including a chamber having a gas inlet and an outlet, a differential pressure gauge measuring a differential pressure between the gas inlet and the outlet, and a plurality of bag filters sequentially installed in the chamber, wherein the filter dust collector includes: A pulsing unit for supplying compressed air and pulsing; And receiving the detection value of the differential pressure gauge in real time, comparing the preset differential pressure range and the measured differential pressure detection value, and applying a preset pulsing restart period corresponding to the preset differential pressure range to adjust the restart period of the pulsing section in real time. It characterized in that it comprises a control unit. According to the present invention, it is possible to further prevent the reduction in filtration performance of the entire filtration dust collector by detecting the differential pressure in real time and adjusting the re-dusting cycle, and detect and compare the instantaneous differential pressure after exhausting each bag filter to compare the abnormality during exhaustion. Detection of the generated bag filter can be further facilitated, and damage to the bag filter and deterioration of dust collection efficiency can be reduced.

Description

Filter dust collector and control method of bag filter pulsing of filter dust collector

The present invention relates to a dust collector, more specifically not only to measure the differential pressure change to adjust the exhaustion cycle, but also to compare the instantaneous differential pressure change after exhaustion of each bag filter to detect an anomalous bag filter and its exhaustion sequence and number It relates to a filtration dust collector to control the pulsation and bag filter pulsing control method of the filtration dust collector.

In general, a filter dust collector is a generic name that refers to a device for removing solid or liquid particulates present in the air. Filtration dust collectors have been used to remove soot or dust from exhaust gases such as boilers, roasters, heating furnaces, and waste incinerators as a countermeasure against pollution, and chemical powder manufacturing, iron, wood, cement manufacturing, and other fine dust generation It is used in workplaces, and in addition, in manufacturing industry, it is installed and used for improving the quality of products by cleaning the air in IC processes and pharmaceutical processes.

These filtration dust collectors are divided into mechanical, electrical, dry, or wet depending on the operation method, and have a simple structure (eg, gravity sedimentation chamber, collision dust collector, centrifugal force) until the size of the particles to be removed is about 10 μm. Cyclone, etc.) may be used.

On the other hand, such a filter dust collecting device has a problem in that the dust discharge imbalance due to pressure loss of the filter bag and the filter dust collecting device during the process of introducing contaminated air including dust, thereby increasing power consumption and compressed air consumption.

Specifically, in the filter dust collecting device, a plurality of bag filters are connected in series to form one column, and each column is dedusted according to a specified pulsing cycle and order.

That is, in the prior art, since exhaustion was performed in a predetermined order and cycle, it is difficult to detect an abnormal bag filter, and accordingly, there is a problem that exhaustion may be excessive or insufficient. In the related art, a problem in which a filter bag has been damaged and a dust collection efficiency has been lowered has been derived due to such a problem.

Republic of Korea Registered Patent No. 10-1750021 (2017.06.16. registered)

The present invention has been devised to solve the above-mentioned conventional problems, as well as to measure the differential pressure change to adjust the exhaustion period, and compare the instantaneous differential pressure change after exhaustion of each bag filter to detect an abnormality and detect the back filter. It is an object of the present invention to provide a filter dust collector and a filter pulsing control method of the filter dust collector to control the order and frequency of exhaustion.

According to an aspect of the present invention, a chamber having a gas inlet and an outlet, a differential pressure gauge measuring a differential pressure between the gas inlet and the outlet, a filter dust collector comprising a plurality of bag filters sequentially installed in the chamber, comprising: a plurality of bag filters A pulsing unit for supplying compressed air to the pulsing unit; And receiving the detection value of the differential pressure gauge in real time, comparing the preset differential pressure range and the measured differential pressure detection value, and applying a preset pulsing restart period corresponding to the preset differential pressure range to adjust the restart period of the pulsing section in real time. It provides a filtration dust collector comprising a control unit.

The re-drive cycle may be a delay time until exhaustion of the plurality of bag filters is completed once in a sequential or separate exhaustion order and then re-executed.

The control unit may detect an instantaneous differential pressure change after exhaustion of each of the plurality of bag filters, and based on this, may control the exhaustion order and/or number of times of the plurality of bag filters within each cycle of exhaustion.

The control unit determines whether each of the same is different from each other after receiving the instantaneous differential pressure change through the differential pressure gauge after exhaustion of each bag filter while the exhaustion of the plurality of bag filters is sequentially performed, and the differential pressure is relatively large. When at least one specific bag filter is present, the driving of the pulsing unit may be controlled so as to control the exhaustion order and number of times of the at least one bag filter.

The control unit may control to change the pulsing order of at least one specific bag filter having a relatively large differential pressure to another bag filter, maintain the pulsing order, increase the number of pulsing, or both.

The control unit may adjust the exhaustion order and the number of times of the at least one bag filter when at least one specific bag filter having a relatively large differential pressure exists even after exhaustion of the plurality of bag filters is repeated multiple cycles.

According to another aspect of the invention, the chamber having a gas inlet and outlet, a differential pressure gauge for measuring a differential pressure between the gas inlet and the outlet, the filter filter comprising a plurality of bag filters sequentially installed in the chamber bag filter pulsing of the filter As, (a) the step of sequentially exhausting a plurality of bag filters; And (b) receiving the detection value of the differential pressure gauge in real time, comparing the preset differential pressure range with the measured differential pressure detection value, and applying a preset pulsing restart period corresponding to the preset differential pressure range to determine the restart period of the pulsing unit. Including the step of adjusting in real time, the re-drive cycle, the pulsing of the bag filter of the filter dust collector, which is a delay time until the next re-implementation after the exhaustion of the plurality of bag filters is completed once in a sequential or separate exhaustion sequence. Control methods are provided.

After step (b), after the exhaustion of each bag filter, the instantaneous differential pressure change is transmitted through the differential pressure gauge, and then determining whether they are the same or different from each other; And (d) when at least one specific bag filter having a relatively large differential pressure exists, change the pulsing order of the at least one bag filter to another bag filter, maintain the pulsing order, increase the number of pulsing, or both. It may further include the step of controlling to include all.

The step (d) may be performed when at least one specific bag filter having a relatively large differential pressure is present even after exhaustion of the plurality of bag filters is repeated multiple cycles.

According to the filter dust collector of the present invention and the filter pulsing control method of the filter dust collector of the present invention described above, it is possible to further prevent filtration performance reduction of the entire filter dust collector by detecting the differential pressure in real time and adjusting and applying the re-dusting cycle. By detecting the instantaneous differential pressure after filter exhaustion and comparing it, it is possible to further facilitate the detection of the bag filter having an abnormality during the exhaustion operation, and it is possible to reduce damage to the bag filter and deterioration of dust collection efficiency.

1 is a view showing a filtration dust collector according to an embodiment of the present invention,
Figure 2 is a graph showing a state in which the differential pressure increases with operation in the filtration dust collector according to an embodiment of the present invention,
3 to 5 are graphs showing fluctuations in the air pulsing cycle according to fluctuations in measurement differential pressure in a filtration dust collector according to an embodiment of the present invention,
6 is a flowchart illustrating a method for controlling pulsing a bag filter in a filtration dust collector according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and the scope of the invention to those skilled in the art is completely It is provided to inform you. The same reference numerals in the drawings refer to the same elements.

The filtration dust collector according to the preferred embodiment of the present invention is used for an industrial plant, which can further facilitate detection of a bag filter having an abnormality during dedusting operation and reduce damage to the bag filter and deterioration of dust collection efficiency.

Hereinafter, the present invention will be described in detail with reference to Examples.

As shown in FIG. 1, the filtration dust collector 10 according to an embodiment of the present invention includes a chamber 100, a differential pressure gauge 200, a bag filter 300, a pulsing unit 400 and a control unit 500 do.

The chamber 100 has an internal space and a gas inlet 110 through which gas containing dust flows and a gas outlet 120 through which purified gas is discharged are provided. The differential pressure gauge 200 is provided to measure the differential pressure between the gas inlet 110 and the gas outlet 120, and the controller 500 detects the measured value of the differential pressure gauge 200 in real time.

Inside the chamber 100, the gas inlet chamber 130 communicating with the gas inlet 110 and the gas outlet chamber 140 communicating with the gas outlet 120 are partitioned by separate partition walls, and the gas inlet chamber 130 ) And a plurality of bag filters 300 are installed in a state that spans both the gas discharge chamber 140. In the following description and related drawings, for convenience of description (not shown), 10 (columns) bag filters 300 will be described based on a case in which the number of installations can be increased or decreased.

The bag filter 300 filters particles such as dust in the gas introduced through the gas inlet 110 using a cloth as a filter medium, and the gas introduced through the gas inlet 110 passes through a plurality of bag filters 300 The particles are removed and then discharged to the outside through the gas discharge chamber 140 and the gas outlet 120.

As shown in FIG. 1, the pulsing unit 400 supplies compressed air to a plurality of bag filters 300 to air pulsate to exhaust the bag filter 300, and the compressed air tank 410, each bag A supply path is formed to supply compressed air to the filter 300, and a plurality of compressed air pipes 420 branched into a plurality, an injection nozzle 430 provided on the compressed air pipe 420, and a plurality of compressed air pipes 420 ) Is provided in each solenoid valve 440 to open or block the flow path. The solenoid valve 440 is applicable as a diaphragm type solenoid valve.

In an embodiment of the present invention, the control unit 500 may control the driving of the pulsing unit 400 to reduce damage to the bag filter and deterioration of dust collection efficiency. Particularly, the specific bag filter 300 having an abnormality during dedusting operation may be reduced. The detection can be further facilitated, further reducing damage to the bag filter and deteriorating dust collection efficiency.

On the other hand, for reference, FIG. 2 shows that the differential pressure of the chamber 100 gradually increases as the bag filter exhaustion progresses for several months.

3 to 5, the control unit 500 receives the detection value of the differential pressure gauge 200 in real time, compares the preset differential pressure range (A, B, C) with the measured differential pressure detection value and then displays By applying a preset pulsing re-drive cycle (P1, P2, P3) corresponding to the set differential pressure range (A, B, C), the re-drive cycle of the pulsing unit is adjusted in real time.

Here, the re-drive cycles (P1, P2, P3) means a delay time before the next re-implementation after the exhaustion of the ten bag filters 300 is completed once (1 cycle) through sequential or separate exhaustion sequences. .

Specifically, as shown in FIG. 3, the control unit 500 detects the differential pressure in real time while the ten bag filters 300 are exhausted and the detected differential pressure is within a set range (for example, 50 to 100 mmAq, A) If it is determined that there is, it is possible to control the driving of the pulsing unit 400 to maintain the currently set air pulsing restart period (for example, 20 to 21 seconds, P1).

In addition, as shown in FIG. 4, the control unit 500 detects the differential pressure in real time while the 10 bag filters 300 are exhausted, and the detected differential pressure exceeds 50 to 100 mmAq and another setting range (for example, If it is judged to be within 100 ~ 200mmAq, B), the currently set air pulsing restart period (e.g. 20 ~ 21 sec, P1) is shortened to 9 ~ 10 sec (P2), for example, and maintained. So that the driving of the pulsing unit 400 can be controlled.

In addition, as shown in FIG. 5, the control unit 500 detects the differential pressure in real time while the 10 bag filters 300 are exhausted, and the detected differential pressure exceeds 100 to 200 mmAq and another setting range (for example, If it is judged to be within 200 ~ 250mmAq, C), the currently set air pulsing restart period (for example, 9 ~ 10 seconds, P2) is shortened to 4 ~ 5 seconds (P3), and the changed state is maintained. So that the driving of the pulsing unit 400 can be controlled.

That is, as the dedusting of the bag filter 300 is repeated many times over a long period of time, the differential pressure between the inlet and outlet of the chamber 100 is forced to gradually increase due to factors such as deterioration of the performance of the bag filter 300. By measuring the differential pressure in real time and shortening and restarting the air pulsing restart period as the detected differential pressure increases, it is possible to prevent the filtration efficiency of the entire precipitator from deteriorating as much as possible.

In the above description, the preset differential pressure range has been described based on three cases of 50 to 100 mmAq, 100 to 200 mmAq, and 200 to 250 mmAq, but this is for convenience of explanation, and the preset differential pressure range may be further refined or changed more widely Can.

In addition, the present invention detects a bag filter in which an abnormality occurs during bag filter exhaustion or particle attachment is more frequent than other bag filters, and the exhaustion order or number of times of this specific bag filter is adjusted or exhaustion order By adjusting both and the number of times, an additional control method is adopted that can further prevent the durability of a specific bag filter and the filtration efficiency of the entire dust collector from being reduced.

Specifically, as shown in FIG. 6, the control unit 500 detects an instantaneous differential pressure change after exhaustion of each of the ten bag filters 300, that is, a total of ten instants during one cycle of bag filter exhaustion. The differential pressure change is sensed, and on the basis of this, the order and/or number of times of exhaustion of the ten bag filters 300 is adjusted within ten bag filter exhaust cycles.

In more detail, the control unit 500 receives the instantaneous differential pressure change after exhausting each of the bag filters 300 through the differential pressure gauge while the exhausting of the ten bag filters 300 is sequentially performed. It is judged whether it is the same or different.

At this time, when the control unit 500 detects that there is at least one relatively large differential pressure among the ten measured instantaneous differential pressures, the specific bag filter 300 corresponding to this is abnormal or the particle is attached compared to other bag filters. It is judged that it is made more frequently and the driving of the pulsing unit 400 is controlled so as to adjust the exhaustion order and number of times of the at least one specific bag filter 300.

For example, the instantaneous differential pressure change after exhaustion of 10 bag filters is the exhaustion of the 4th and 5th bag filters to 0.001, 0.001, 0.001, 0.001, 0.003, 0.004, 0.001, 0.001, 0.001, 0.001 (unit mmAq), respectively. If the momentary pressure difference is different from the others, the order and number of exhaustion of the 4th and 5th bag filters are adjusted.

In the present invention, as described above, the exhaustion order of the 4th and 5th bag filters having a larger instantaneous differential pressure compared to other bag filters is moved forward and the number of times is increased to increase the exhaustion efficiency of a specific bag filter, thereby increasing the overall filter. It can prevent the dust collection efficiency from falling.

For example, the exhaustion of one cycle is completed, and the next cycle is the 5th, 4th, 1st, 2nd, 3rd, 6th, and 7th air pulsing in order from the 1st to 10th bag filters. You can change the order in the order of the 8th, 9th, and 10th bag filters.

In addition, after the exhaustion of one cycle is completed, the order of air pulsing sequentially in the order of the 1st to 10th bag filters is maintained in the next cycle, and the number of times of air pulsing of the 4th and 5th bag filters is applied more than 2 times. It might be. That is, the first bag filter air pulsing once, the second bag filter air pulsing once, the third bag filter air pulsing once, the fourth bag filter air pulsing twice, the fifth bag filter air pulsing twice, the sixth bag filter The order of air pulsing once, air pulsing once in the seventh bag filter, air pulsing once in the eighth bag filter, air pulsing once in the ninth bag filter, and air pulsing once in the tenth bag filter can be applied.

In addition, the control unit may control the bag filter exhaustion to include both the former (adjustment of the exhaustion order) and the latter (adjustment of the number of exhaustions). The exhaustion order and the number of times can be adjusted by controlling the opening/closing order and opening degree of the plurality of solenoid valves 440 described above.

In an embodiment of the present invention, the control unit 500, even if the exhaust of the plurality of bag filters 300 is repeated multiple cycles, as described above, if at least one specific bag filter having a relatively large differential pressure is present, at least Adjust the exhaustion order and frequency of one bag filter. Therefore, it is possible to more reliably check whether or not a specific bag filter is abnormal, thereby reducing the efficiency of the dust collector.

Hereinafter, a method for pulsing a bag filter of a filtration dust collector according to an embodiment of the present invention will be described.

As shown in Figure 1, Figure 6, the bag filter pulsing control method of the filtration dust collector according to an embodiment of the present invention, the chamber 100 having a gas inlet 110 and the gas outlet 120, gas inlet 110 ) And a differential pressure gauge (200) for measuring the differential pressure between the gas outlet (120), and a plurality of bag filters (300) sequentially installed in the chamber (100) relates to bag filter pulsing of a filter dust collector, which sequentially exhausts the bag filter Step (S100), the real-time control of the re-drive cycle of the pulsing unit 400 (S200), the instantaneous differential pressure change after each filter exhaust (S300), the pulsing sequence and the number of control steps (S400).

First, the plurality of bag filters 300 are sequentially exhausted (S100).

Next, the control unit 500 receives the detection value of the differential pressure gauge 200 in real time, compares the preset differential pressure range and the measured differential pressure detection value, and then applies a preset pulsing re-drive cycle corresponding to the preset differential pressure range to the pulsing unit The re-drive cycle of 400 is adjusted in real time (S200). Here, the re-drive cycle corresponds to a delay time until exhaustion of the plurality of bag filters 300 is completed once in a sequential or separate exhaustion sequence, and then re-executed, and detailed description thereof will be omitted below.

Next, the control unit 500 determines whether the mutual difference is the same or different after receiving the instantaneous differential pressure change after the exhaust of each bag filter 300 through the differential pressure gauge 200 (S300).

Subsequently, when at least one specific bag filter 300 having a relatively large differential pressure exists, the control unit 500 changes the pulsing order of the at least one bag filter 300 to another bag filter, or the pulsing order. Maintain and increase the number of pulses or control to include both (S400).

Here, in step S400, the exhaustion of the plurality of bag filters 300 is performed even when at least one specific bag filter having a relatively large differential pressure is present even after repeated multiple cycles of at least two or more times.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto, and is limited by the claims below. Therefore, one of ordinary skill in the art can variously modify and modify the present invention without departing from the technical spirit of the claims to be described later.

100: chamber 200: differential pressure gauge
300: bag filter 400: pulsing part
440: solenoid valve 500: control

Claims (9)

A chamber 100 as a single compartment having a gas inlet 110 and a gas outlet 120, a differential pressure gauge 200 for measuring a differential pressure between the gas inlet and the outlet, n bag filters 300 sequentially installed in the chamber As a filtration dust collector comprising:
A pulsing unit 400 for supplying compressed air to the n bag filters 300 and pulsing them; And
After receiving the detection value of the differential pressure gauge 200 in real time, comparing the preset differential pressure range and the measured differential pressure detection value, and applying a preset pulsing restart period corresponding to the preset differential pressure range, real-time the restarting period of the pulsing unit It includes a control unit 500 for adjusting,
The control unit 500 receives the instantaneous differential pressure change through the differential pressure gauge n times after exhaustion of each bag filter while the exhausting of the n bag filters 300 is sequentially performed. If at least one specific bag filter having a relatively large differential pressure is present based on the determination result, the exhaustion order and exhaustion of the at least one specific bag filter within one exhaustion cycle in which exhaustion of n bag filters is completed Control the driving of the pulsing unit to adjust the number of times,
The control unit 500, the differential pressure of the filter is characterized in that the control so as to increase the number of times the exhaustion while changing the exhaustion order of at least one specific bag filter is relatively large before the other bag filter. According to claim 1,
The re-driving cycle is a filtration dust collector characterized in that the exhaustion of the n bag filters 300 is completed once in a sequential or separate exhaustion order, and then re-executed. delete delete delete According to claim 1,
The control unit 500, the at least one specific bag filter 300 when the differential pressure is relatively large even after the exhaustion of the n bag filters 300 is made by repeating a plurality of exhaustion cycles, the at least one specific A filtration dust collector characterized in that it controls the order of dusting and the number of dusting of the bag filter. A chamber 100 as a single compartment having a gas inlet 110 and a gas outlet 120, a differential pressure gauge 200 measuring a differential pressure between the gas inlet and the outlet, and n bag filters sequentially installed in the chamber 100 Regarding the bag filter pulsing of the filtration dust collector comprising 300,
(a) sequentially exhausting the n bag filters 300;
(b) After receiving the detection value of the differential pressure gauge 200 in real time, comparing the preset differential pressure range and the measured differential pressure detection value, and applying a preset pulsing re-drive cycle corresponding to the preset differential pressure range, n bag filters ( 300) adjusting the re-drive cycle of the pulsing unit 400 to pulse by supplying compressed air in real time;
(c) After the exhaustion of each bag filter is sequentially performed while the exhaustion of the n bag filters 300 is sequentially performed, determining an instantaneous differential pressure change through the differential pressure gauge n times, and then determining whether they are the same or different from each other. ; And
(d) If at least one specific bag filter having a relatively large differential pressure is present based on the determination result, the exhaustion order and exhaustion of the at least one specific bag filter within one exhaustion cycle in which exhaustion of n bag filters is completed Adjusting the number of times, and controlling to increase the number of times of exhaustion while changing the order of exhaustion of at least one specific bag filter having a relatively large differential pressure to another bag filter,
The re-drive cycle is a delay time before the next re-implementation after the exhaustion of the n bag filters 300 is completely completed. delete The method of claim 7,
In step (d), the bag of the filtration dust collector is characterized in that it is carried out when at least one specific bag filter having a relatively large differential pressure is present even after the exhaustion of the n bag filters 300 is repeated multiple cycles. Filter pulsing control method.

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