KR101603127B1 - Air pulsing controllers for dust collector of petrochemical plants - Google Patents

Abstract

The present invention relates to an air-pulsing control apparatus, and more particularly, it relates to an air-pulsing control apparatus capable of detecting a failed specific valve among solenoid valves for blowing compressed air into a bag filter of a petrochemical dust collection facility, The present invention relates to an air pulsing control apparatus for a petrochemical dust collecting facility.

Description

Technical Field [0001] The present invention relates to an air pulsing controller for a petrochemical dust collecting apparatus,

The present invention relates to an air-pulsing control apparatus, and more particularly, it relates to an air-pulsing control apparatus capable of detecting a failed specific valve among solenoid valves for blowing compressed air into a bag filter of a petrochemical dust collection facility, The present invention relates to an air pulsing control apparatus for a petrochemical dust collecting facility.

Generally, a petrochemical dust collecting facility is a facility that receives polluted gas containing dust into the dust collecting chamber, filters only dust in the polluted gas, and then discharges the clean purified gas from which dust has been removed into the air.

In addition, dust collecting chambers are equipped with a plurality of bag filters for attaching dust and allowing air to pass therethrough. Since dust accumulates over time and the filtration performance deteriorates, You must give.

As for the articulation of the dust, there is a method of physically striking the bag filter using a hemmer and a method of spraying strong compressed air into the bag filter to cause the dust to fall.

Among them, in the method of injecting compressed air into the bag filter, compressed air is injected into each bag filter by using a plurality of solenoid valves, thereby causing the dust to fall.

In addition, the inside of the dust collection chamber is divided into a suction space into which the polluted gas flows and a discharge space through which purge gas is discharged based on the bag filter. The solenoid valve detects a pressure difference between the suction space and the discharge space, The operating speed of the solenoid valve is adjusted according to the size of the solenoid valve.

On the other hand, when a failure occurs in a part of the solenoid valves, the differential pressure between the suction space and the discharge space is not easily lowered. In this case, since the operating speed of the entire solenoid valve must be increased, There is a problem in that the life of the solenoid valve that is not exposed can be reduced.

In addition, in order to replace a failed solenoid valve, a worker must go to a large power collecting facility to judge whether the solenoid valve is faulty or not, and to replace the failed solenoid valve, thereby reducing the work time of the solenoid valve and increasing the life of the solenoid valves It is important to accurately detect in advance whether or not a failure has occurred in any solenoid valve.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a solenoid valve for air pulsing of a petrochemical dust collecting apparatus capable of remotely diagnosing which kind of malfunction has occurred in any valve And to provide an air pulsing control device.

It is another object of the present invention to provide an air pulsing control apparatus which can easily expand a control current output port for controlling a solenoid valve in the case of a dust collecting apparatus having a large number of solenoid valves.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to accomplish the above object, the present invention provides an air pulsing control device for controlling solenoid valves for blowing air into a bag filter of a petrochemical dust collection facility to remove dust from a bag filter, And a main controller connected to the solenoid valves and controlling the opening and closing of the solenoid valves, the main controller comprising: output ports connected to the solenoid valves, respectively, A control current output unit for supplying a control current to the solenoid valves; A differential pressure signal input unit for receiving a differential pressure signal, which is a differential pressure between a suction space and an exhaust space of the dust collecting apparatus, from a differential pressure sensor of the dust collecting facility; A control unit receiving the differential pressure signal to calculate an output period of the control current, and outputting a control current to the control current output unit according to the calculated output period; And a current sensor for measuring an operating current applied to the coil of the solenoid valve when the control current is outputted and the solenoid valve is turned on and transmitting the measured current to the controller, And outputs an abnormality occurrence signal to the outside when the value exceeds the upper limit threshold value or is lower than the lower limit threshold value.

In a preferred embodiment, the main controller includes: a power supply unit receiving external power and generating the control current; An information input unit receiving the upper threshold value and the lower threshold value from a user and storing the received upper threshold value and the lower threshold value in the control unit; A display unit for displaying information input to the information input unit or an operation state of the solenoid valves; And an abnormality occurrence signal output unit for outputting the abnormality occurrence signal by wired or wireless to an external alarm apparatus.

In a preferred embodiment, the control unit sequentially outputs the control current to the output ports according to the output period, and the current sensor unit measures an operation current applied to the corresponding solenoid valve when the control current is outputted The control unit outputs an abnormality occurrence signal when the operation current value measured by the current sensor unit exceeds the upper limit threshold value or is lower than the lower limit threshold value.

In a preferred embodiment, the controller further outputs failure information of a specific solenoid valve whose operation current value exceeds the upper limit threshold value or lower than the lower limit threshold value to the outside.

In a preferred embodiment, the failure information includes short-circuit failure information indicating that the solenoid valve is deteriorated and short-circuited when the operation current exceeds the upper-limit threshold value, and short-circuit failure information indicating that the solenoid valve is disconnected And open failure information which is information indicating that the connection is not established.

In a preferred embodiment, the main controller further includes: a communication unit for transmitting failure information of the solenoid valve to the outside, or receiving the upper threshold value and the lower threshold value from the outside and storing the received upper threshold value and the lower threshold value in the control unit .

In a preferred embodiment, the air pulsing control apparatus is provided at a remote location apart from the main controller, and is connected to the communication unit of the main controller by wire or wirelessly, and receives the upper threshold value and the lower threshold value from the user Further comprising: a remote controller for receiving and displaying information on the failure of the solenoid valve transmitted to the main controller or transmitted from the main controller.

In a preferred embodiment of the present invention, the air pulsation control apparatus further comprises: a solenoid valve connected to the main controller through an expansion port and connected to the output port when the number of the output ports is smaller than the number of the solenoid valves; And an expansion controller having an expansion output port connected to output a control current.

The present invention has the following excellent effects.

First, according to the air pulsation control apparatus of the present invention, it is possible to accurately detect whether any type of failure occurs in any solenoid valve by only one current sensor.

According to the air pulsing control apparatus of the present invention, when the output port is insufficient, the output port can be added simply by adding the expansion controller without adding the main controller, thereby minimizing the cost required for the expansion of the output port .

Further, according to the air pulsing control apparatus of the present invention, the main controller can be controlled at a remote place by using a remote controller, and the operator can be notified of the failure information immediately when a failure occurs.

1 is a use state diagram of an air pulsing control apparatus according to an embodiment of the present invention,
2 is a configuration diagram of an air pulsing control apparatus according to an embodiment of the present invention,
3 is a diagram for explaining a method of diagnosing a fault condition of an air pulsing control apparatus according to one embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

1, an air pulsing control apparatus according to an embodiment of the present invention controls the opening and closing of solenoid valves 15 for injecting compressed air into a bag filter 11 of a dust collecting apparatus 10, It monitors whether any type of failure has occurred in the valve and outputs an abnormality occurrence signal to the external alarm device 30 or the remote controller 200 managed by the operator when a failure occurs.

The dust collecting apparatus 10 includes a plurality of bag filters 11 for collecting dust 1 and dust is contained in the inner space of the dust collecting apparatus 10 based on the bag filter 11 A suction space 12 into which the contaminated air is introduced and a discharge space 13 through which the purified air from which dust is removed is discharged.

The dust collector 10 is provided with a pressure gauge 14 for measuring a pressure difference between the suction space 12 and the discharge space 13 and outputting a differential pressure signal.

In the case of the dust collecting apparatus 10 not provided with the pressure gauge 14, the air pulsing control apparatus of the present invention may include the pressure gauge 14.

The solenoid valves 15 of the dust collecting apparatus 10 are provided in a number corresponding to the bag filter 11 on a one-to-one basis and the compressed air of the external compressor 20 is injected into the bag filter 11.

Hereinafter, the configuration of the air pulsation control apparatus of the present invention will be described in detail.

1 and 2, an air pulsing control apparatus according to an embodiment of the present invention includes a main controller 100, a remote controller 200 connected to the main controller 100 in a wired or wireless manner, And an expansion controller 300 for expanding the output port of the main controller 100. [

The main controller 100 is installed in a predetermined portion of the dust collecting apparatus 10 and supplies a control current for opening and closing the solenoid valve 15 to the solenoid valve 15, .

The main controller 100 includes a control current output unit 110, a differential pressure signal input unit 120, a control unit 130 and a current sensor unit 140. The main controller 100 includes a power supply unit 150, 160, a display unit 170, an abnormality signal output unit 180, and a communication unit 190.

The control current output unit 110 outputs a control current for opening and closing the solenoid valves 15 to the solenoid valves 15 and a plurality of output ports (111).

Although the number of the output ports 111 is sixteen in the embodiment of the present invention, the number of the output ports 111 is not limited.

When the number of the output ports 111 is smaller than the number of the solenoid valves 15, the control output is outputted to the solenoid valve using the extended output port 310 of the expansion controller 300.

That is, when the number of the output ports 111 is insufficient, the expansion controller 300 increases the number of the output ports 111 and connects the expansion port 191 of the main controller 100 And outputs the control current to the control unit 130 under control.

Therefore, when the number of the output ports 111 is insufficient, the air pulsing control apparatus according to an embodiment of the present invention easily connects only the expansion controller 300 without outputting the main controller 100, Since the port 111 can be additionally provided, the cost associated with the extension of the output port 111 can be greatly reduced.

The differential pressure signal input unit 120 receives a differential pressure signal which is a pressure difference between the suction space 12 and the discharge space 13 from the pressure gauge 14 of the dust collection facility 10.

In addition, the differential pressure signal may be an analog signal or a digital signal, and in the case of an analog signal, the main controller 100 may include an AD converter for converting an analog differential pressure signal into a digital signal.

The control unit 130 receives the differential pressure signal, calculates an output period of the control current output to the output port 111, and outputs a control current according to the calculated output period.

Also, the controller 130 sequentially outputs the control currents to the output ports at a calculated output period.

More specifically, the control current is sequentially output from the first output port to the 16th output port, and sequentially outputted with a time difference of the calculated output period.

When the value of the differential pressure signal is large, the control unit 130 shortens the output period to increase the number of air pulsing operations, and gradually increases the output period when the differential pressure signal becomes small.

The current sensor 140 measures a value of an operation current applied to the solenoid valve by controlling the control current, and transmits the measured current to the controller 130.

Meanwhile, the operation current is supplied to the coil of the solenoid valve so as to operate the solenoid valve, and the control current is different from the current in that the operation current is supplied to the solenoid valve.

Also, the operating current may be output through the output port 111, and the operating current supply lines of all the solenoid valves may be connected by a common line.

Also, the operating current may be supplied from the external power supply to the solenoid valve without being output from the main controller 100.

The power supply unit 150 receives external power to generate the control current and the operation current, and supplies power to each component of the main controller 100.

Referring to FIG. 3, the solenoid valves 15a and 15b are connected in parallel to the power supply unit 150 through a common line.

The current supplied from the power supply unit 150 to the solenoid valves 15a and 15b is an operation current and the current supplied from the controller 130 to the solenoid valves 15a and 15b is a control current .

In addition, the current sensor unit 140 is constituted by one sensor for measuring a current of a common line to which the solenoid valves 15a and 15b are connected.

That is, since the solenoid valves 15a and 15b operate sequentially at different times, an operating current supplied to each of the solenoid valves 15a and 15b can be detected by only one sensor.

If the measured operation current value exceeds the upper threshold value or is lower than the lower threshold value, the controller 130 determines that a failure has occurred and outputs an abnormal generation signal to the outside.

Further, the controller 130 may further output failure information of the solenoid valve in which an abnormality has occurred to the outside.

The failure information is information indicating whether a failure has occurred in a certain solenoid valve. When the operation current exceeds the upper limit threshold value, the failure information is information indicating that the solenoid valve is deteriorated and short- Which is information indicating that the solenoid valve is disconnected or not connected when the threshold value is less than the lower limit threshold value.

For example, the failure information may be '1 failure of solenoid valve'.

The information input unit 160 receives the upper limit threshold value and the lower limit threshold value from the user and stores the upper limit threshold value and the lower limit threshold value in the control unit 130. The information input unit 160 detects whether the expansion controller 300 is used, A control current output order of the output port 310, an output period according to the magnitude of the differential pressure signal, and the like, and store the received control period in the controller 130.

However, in the case where the extension controller 300 is used or not, the controller 130 can recognize itself when the extension controller 300 is connected.

The display unit 170 may display information input to the information input unit 160 or may display an operating state of the solenoid valve 15, failure information, and the like.

The abnormality occurrence signal output unit 180 outputs an abnormality occurrence signal output from the controller 130 to the external alarm apparatus 30.

The communication unit 190 transmits failure information to the remote controller 200 or receives information input from the remote controller 200 and transmits the information to the controller 130.

The remote controller 200 controls the main controller 100 at a remote location. The remote controller 200 can set the upper and lower thresholds at a remote location, 300), and the output period can be set.

Also, the remote controller 200 receives and displays the failure information from the main controller 100, thereby enabling the user to immediately check the abnormal state of the solenoid valve at a remote place.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.

100: main controller 110: control current output section
120: differential pressure signal input unit 130:
140: current sensor unit 150: power supply unit
160: Information input unit 170:
180: abnormality signal output unit 190:
200: remote controller 300: expansion controller

Claims (8)

An air pulsing control apparatus for controlling solenoid valves for blowing air into a bag filter of a petrochemical dust collection facility to remove dust from the bag filter,
And a main controller provided at a predetermined portion of the dust collecting apparatus and connected to the solenoid valves to control opening and closing of the solenoid valves,
The main controller:
A control current output unit including output ports connected to the solenoid valves, respectively, for supplying a control current to the solenoid valves;
A differential pressure signal input unit for receiving a differential pressure signal, which is a differential pressure between a suction space and an exhaust space of the dust collecting apparatus, from a differential pressure sensor of the dust collecting facility;
A control unit receiving the differential pressure signal to calculate an output period of the control current, and outputting a control current to the solenoid valves sequentially according to the calculated output period;
A power supply unit receiving external power to generate the control current and the operation current of the solenoid valves; And
And a current sensor unit for measuring an operating current applied to the coil of the solenoid valve when the control current is outputted and the solenoid valve is turned on,
The solenoid valves are connected in parallel to the power supply through a common line to receive an operating current and are sequentially 'on' by the control current,
Wherein the current sensor unit measures an operation current of the common line, sequentially detects a dynamic current of each of the solenoid valves,
When the measured operation current value exceeds the upper limit threshold value or is lower than the lower limit threshold value, the control unit outputs an abnormality occurrence signal to the outside, and also outputs the failure information of the specific solenoid valve which indicates whether a failure occurs in which solenoid valve And the air pulsation control device.
The method according to claim 1,
The main controller:
An information input unit receiving the upper threshold value and the lower threshold value from a user and storing the received upper threshold value and the lower threshold value in the control unit;
A display unit for displaying information input to the information input unit or an operation state of the solenoid valves; And
And an abnormality occurrence signal output unit for outputting the abnormality occurrence signal to an external alarm device by wire or wireless.
delete delete The method according to claim 1,
Wherein the failure information includes short-circuit failure information which is information that the solenoid valve is deteriorated and short-circuited when the operation current exceeds the upper-limit threshold, and open-circuit failure information which is information indicating that the solenoid valve is disconnected or not connected when the operation current is lower than the lower- And fault information.
6. The method of claim 5,
Wherein the main controller comprises:
Further comprising: a communication unit for transmitting failure information of the solenoid valve to the outside or receiving the upper limit threshold value and the lower limit threshold value from the outside and storing the received upper limit threshold value and the lower limit threshold value in the control unit.
The method according to claim 6,
Wherein the air pulsation control device comprises:
The main controller is remote from the main controller and is connected to the communication unit of the main controller through a wired or wireless connection. The upper threshold value and the lower threshold value are received from the user and transmitted to the main controller, Further comprising: a remote controller for displaying failure information of the solenoid valve that is connected to the air pump.
The method according to claim 6,
Wherein the air pulsation control apparatus comprises:
And an expansion output port connected to the main controller through an expansion port and connected to a solenoid valve not connected to the output port and outputting a control current when the number of the output ports is smaller than the number of the solenoid valves, Further comprising a controller for controlling the air flow rate.

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