KR20030044147A - Automatic control Dust-collector - Google Patents

Abstract

PURPOSE: An automatic remote control system for filter dust collector is provided to maintain proper operation state of the total system by analyzing the collected information through software and remotely central control the dust collector by grasping the dust collector state after collecting information using information collecting hardware and driving hardware. CONSTITUTION: The automatic remote control system for filter dust collector comprises an information collection part comprising a plurality of gauge pressure sensors(35), differential pressure sensors(36) and temperature sensors(37) for collecting necessary information; driving units(34) for controlling operation of diaphragm valve; local control units(33) for controlling the gauge pressure sensors(35), differential pressure sensors(36), temperature sensors(37) and driving units(34); and a network control unit(32) for transmitting data and control information to a plurality of the local control units(33) or receiving the data and control information from the plurality of the local control units(33) and transmitting data to a personnel computer or server(31) and receiving the data from the personnel computer or server(31), wherein the personnel computer or server(31) analyzes and stores received information, changes control information based on the analyzed results and transmits the changed control information to the network control unit(32).

Description

Remote Automatic Control System for Filter Dust Collector {Automatic control Dust-collector}

The present invention is vacuum filtration by collecting various contaminants generated in the industrial field,

The present invention relates to a remote filter control system for discharging the bag filter.

It configures necessary information gathering hardware and driving hardware,

Collect information and analyze it through software to ensure proper operation of the entire system

Filtration to maintain the status, grasp the status of the dust collector and remotely control it centrally

It relates to a dust collector remote automatic control system.

1 is a configuration diagram for explaining a conventional filter dust collector. Seen in Bonn

As can be seen, contaminants such as dust and fumes generated in the manufacturing process are blowers (7).

Inhaled together with air by suction pressure generated from In the dust collector

Filtered air is filtered through the filter media (1) disposed and purified air

Discharge to the outside.

In this process, contaminants are attached to the surface of the filter medium (1).

Pressure loss will increase. If the pressure loss increases, the power of the blower increases.

As a result, the suction capacity drops and the performance of the dust collector is reduced.

To eliminate this, the clean compressed air stored in the air tank (4)

Instantaneous supply through operation of the pram valve (3) and filtration through the air nozzle (2)

Contamination adhered to the surface of the filter medium 1 by spraying in the opposite direction as in the state

Drop the material. Dropped contaminants are added to the bottom with increased size.

To the outside through the rotary valve (8) and screw conveyor (9).

The method of controlling the operation of the dust collector by the conventional method is a fixed time and quantity

The controller 6 operates to spray compressed air at regular intervals for exhaustion.

In this way, the upper and lower output contact differential pressure manometer (5) is partially

In some cases, control is performed in conjunction with a PLC.

Clean compressed air injection method under the fixed conditions of the existing technology is the filter media (1)

Regardless of the degree of contamination, dust is exhausted, resulting in excessive use of clean compressed air.

Operation by increasing the power cost, promoting the aging of the filter medium (1) and increasing the damage rate

This leads to an increase in maintenance costs.

In case of differential pressure setting control through PLC, it is possible to control according to the pollution level.

Optimal setting of operating conditions, determination of adequacy of the current operating state, collection of operation history

Expensive equipment should be provided in the construction of additional equipment for carrying out

There are many practical problems due to the need for professional manpower for operation and maintenance.

Existed.

In addition, due to the characteristics of the dust collector,

When a problem occurs such as a malfunction or leakage of clean compressed air,

Clean compression installed in the upper part of dust collector even when checking the abnormality

There is a problem that it is difficult to identify the fault of the air supply.

It is difficult to secure professional management personnel for facilities even when checking for failures.

There are many difficulties in checking and repairing its own failure site

The time required for diagnosis and inspection and repair time increase in case of inspection

Factory outages due to the shutdown of facilities and excessive expenditure of repair costs.

Problems have arisen. To prevent this, we will expand the number of managers

Excessive costs are incurred when the facility is regularly monitored or outsourced.

There were many problems in effective management such as occurrence.

Therefore, the object of the present invention to solve this problem is to filter

Hard to collect the information necessary for the operation history and status of dust collector

The software and send the collected information to a personal computer or server

It is intended to conduct effective analysis and control.

Also, by establishing such a system, it is possible to grasp the operation status of the equipment

During operation, such as checking the occurrence, identifying the problem occurrence and daily management

By creating an optimal environment for what can happen

Minimization, maintenance cost reduction, driving power cost reduction

To develop and build a control system.

1 is a configuration diagram for explaining the structure of the present dust collector.

2 is a block diagram of an automatic control dust collector according to an embodiment of the present invention.

3 is a block diagram of the flow of control information and device-specific functions.

4 is a configuration diagram of a digital output sensor.

5 is a configuration diagram of a sensor control unit.

6 is a configuration diagram of a drive unit.

7 is a configuration diagram of a local control unit.

8 is a configuration diagram of a network control unit.

* Explanation of symbols for important parts of the drawings

1. Filter media (bag filter)

2. Air nozzle

3. Diaphragm Valve

4. Air tank

5. Differential pressure manometer

6. Controller

7. Suction blower

8. Rotary valve

9. Screw Conveyor

10. Suction duct

21. Differential pressure sensor

22. Instrument pressure sensor

23. Detection sensor (driving)

24. Detection sensor (alarm)

25. Detection sensor (emergency stop)

26. Slide Gate

27. Controller set

31. Personal Computer

32. Network Control Unit

33. Local control unit

34. Drive Unit

35. Digital output sensor (barometric pressure)

36. Digital output sensor (differential pressure)

37. Digital output sensor (temperature)

38. On / off switch sensor set

Main part constituting the system of the present invention to achieve the above object

The configuration is shown in FIG. The system is composed of necessary information

Information consisting of a plurality of gauge pressure sensor 36, differential pressure sensor 37, temperature sensor 38

Drive unit 34 for controlling the operation of the collector and diaphragm valve, sensor and drive

Local control unit 33 for controlling the unit, and a plurality of local control units

Personal computer and the role of sending and receiving data and control information

Or a network control that performs data transmission / reception with the server 31.

It is comprised of the unit 32.

The personal computer or server 31 performs analysis and storage of the received information

The control information is changed based on the analysis result and the network control unit 32 is changed.

It is to transmit to.

Such a system is suitable for operating conditions, abnormalities, and operating conditions of the whole

It is possible to grasp the operation information such as confirmation and based on the collected equipment information.

Optimize the setting of initial operating conditions for remote automatic control

Enable remote control operation.

The structure and function of each major part constituting this system will be described below.

The configuration of the sensors 35, 36 and 37 is shown in FIG. 4 and has the following configuration.

The analog signal output from the measuring unit 41 is transferred through a standardized amplification circuit.

Amplify to a range suitable for microcontroller 42 and micro

Digital using the analog-to-digital converter 43 inside the controller 42

Value and convert it back to the conversion table stored in ROM 44

It is converted and stored in the CPU 45.

The stored value changes the output port 46 when the local control unit 33 transmits a request.

It is output through and converted into RS485 communication data in the communication conversion chip 47

It is sent to the local control unit 33.

Digital output sensor with such a configuration

The output sensor 35 is the pressure of the air tank 4, the differential pressure digital output sensor 36 is a filter

Pressure loss and temperature digital output sensor (37) generated in the media (1)

The information about the internal temperature is measured and sent to the local control unit 33

Stored.

The drive unit 34 is shown in FIG. 5 and has the following configuration.

The microcontroller 51 performing the control of the unit, the current driving state

Drive display 53 to display, the solenoid coil of the diaphragm valve

Drive module 54 with an output for driving, general purpose for communication support

Asynchronous transmission / reception module (55), 485 communication conversion module (56), abnormal condition of host controller

Initial condition setting switch 57, which provides information, whether the unit is master or slave

And an identification number setting switch 58 for assigning an identification number.

The driving unit 34 is master / slave by the identification number setting switch 58,

Each identification number is assigned. In case of master, control by serial communication

And drive information received from the local control unit 33 to perform control.

The information is sent to the local control unit 33.

Prestored driving when the control information is not transmitted from the local control unit 33

Driven by information and no saved information (Restart due to power failure etc.)

When the initial condition setting switch 57 is read.

In the case of a slave, the general-purpose asynchronous transmission / reception module 55 controls the master.

485 communication conversion module 56 receives and performs control information and drive information

Send. The driving module 54 is composed of a driving IC, a triac, and the like. Driving

The output port of the module is individually controlled by the microcontroller 51

Information on the output of the output unit is received by the microcontroller 51.

The microcontroller 51 drives the display based on the received output signal.

The status will be displayed at 53. Receive control information from local control unit 33

To store and thereby control the drive module 54.

When the system is normal due to the configuration of the drive unit 34, the drive unit

All operation information of 34 is transmitted and the entire control system 31, 32, 33

Even if it stops, the drive unit can maintain its basic function to prevent equipment shutdown.

have.

The local control unit 33 is shown in FIG. 6 and has the following configuration.

Microcontroller 61 for performing the control of the drive unit, which gives an identification number

Identification number setting switch 62 for storing data used for reception and transmission

Dual Port RAM (63) Data Controller (64) to Organize Data of Multiple Ports

Universal asynchronous transmission and reception module (65), 485 communication conversion module (66), for communication support

On / off switch sensor (67) for sending a signal to the input port of the microcontroller,

It consists of an output module 68 consisting of a relay for controlling external devices.

The network control unit 32 is shown in FIG. 7 and has the following configuration.

Have Microcontroller 71 to control the drive unit, several ports

Data controller 72 for organizing data, used for receiving and sending

Universal asynchronous for dual port RAM (73) communication support to save data

Send / receive module 74, 485 communication conversion module 75, RS232C communication conversion module 76

It is composed.

The interaction of each element with this configuration is as follows.

Local control unit 33 is connected to each sensor and RF communication cable and connection

Connected and communicated with RS485, and the data of each sensor by standard protocol

Receive packets with their respective headers. Local control unit 33 is attached

The information of the sensor is circulated and received and stored based on the information.

Directly controlling the operation of the drive unit 34 in comparison with the control information, the drive unit

Receives and stores the driving information of 34.

The network control unit 32 circulates the information stored in the local control unit 33.

Receive and store it and check the status of the personal computer or server 31

And send. If there is no response from the personal computer or server,

Maintain control information in the local control unit 33 by using the stored control information

Or update. When there is a response from a personal computer or server

The control unit 32 transmits the stored information and sends it to the personal computer or server.

Receives the changed control information based on the latest information and saves it in the ROM

Transmit to local control unit 33.

The personal computer or server collects the received information from the main

Change in pressure of air tank (4), pressure loss in filter media (1), and

Based on the temperature, the graphic output of the change form of the tank pressure, the history of the change of the differential pressure, etc.

The result is displayed on the monitor. In addition, the pressure and differential pressure fluctuations

Compare or calculate with the setpoint and based on the results

The control unit 32 transmits the result to the monitor.

The administrator then checks the displayed results and confirms the final approval.

Can be rough. Therefore, the administrator checks and manages the entire control process.

can do.

Hereinafter, the configuration of the preferred embodiment of the present invention operated in such a configuration

And to describe the operation will be described with reference to the accompanying drawings.

Example

2 is a configuration example of an automatic control dust collector constructed by applying the present invention.

The basic device attached to the dust collector is the same as the existing dust collector and slide gate

(26) is added for the purpose of saving driving power.

And the pressure gauge and differential pressure manometer attached to the air tank (4) of the existing dust collector

(5) was replaced by an instrument pressure digital sensor (22) and a differential pressure digital sensor (21).

The control system of the diaphragm valve (3) to maintain the function of the filter medium (1)

Operation control, checking the operation status of equipment by the pressure of air tank 4, driving detection

Lower part using sensor 23, alarm detection sensor 24, emergency stop detection sensor 25, etc.

It can be divided into three parts of the operation control of the discharge device and this series of control

Display the procedure in the software of the personal computer 31 and confirm the information

And control.

Operation control of the diaphragm valve is measured by the differential pressure digital sensor 21

The operation is determined based on the differential pressure. When the set differential pressure condition is reached

When the diaphragm valve (3) is operated according to a predetermined condition,

Dust is removed.

When the diaphragm valve (3) starts to operate, the differential pressure and the differential pressure until the operation is completed

Analyze whether the filter medium (1) for each diaphragm valve (3) line is appropriate,

The progress of old age and damage can be checked.

The information of the gauge pressure digital sensor 22 installed in the tank indicates the pressure change in the tank.

Used to analyze.

When the diaphragm valve 3 operates, the pressure drops to rise to a certain pressure.

Use the pressure graph (P-T diagram) to change the decrease or slope of the pressure drop.

In comparison, whether the diaphragm valve 3 is opened, whether it is fully open or not,

You can see the difference in time and by analyzing the change in the curve slope of the rise

It is possible to determine the amount of air that has escaped to the applicator valve (3) and whether the piping line is leaking.

have.

The drive detection sensor 23 has an appropriate amount of accumulated dust in the lower part depending on the installation position.

When reaching, by operating the discharge device linked to the output module

It has the effect of reducing power costs and extending the life of the equipment. Also alarm

The detection sensor 24 and the emergency stop detection sensor 25 check whether the discharge device operates normally.

Function to check whether there is a problem with the dust collector which cannot be checked internally by

It is to prevent the damage of equipment.

Control of the operation of these dust collectors can all be performed in one system

To ensure time and money loss and stability

Solve the problem and remotely check and control the operation status of the dust collector

This reduces labor costs, maintenance costs, and maintenance costs.

The increase can be achieved.

The effects of the present invention are largely divided into minimization of time required for user management,

Standardized management, reduced maintenance costs, reduced power costs and equipment

This can be seen as an increase in lifespan.

First, when calculating the time required for management, 10 diaphragm valves (3)

In the case of an average company with four installed dust collectors, check the facilities by daily work

3 hours per person (2 times a day), about 3 hours 30 minutes

The time required for maintenance due to equipment failure and repair

Considering this takes about 4 hours / day. In the case of the present invention attached to the equipment

Checking and controlling the operation status of the equipment, automatic alarm of abnormality, automatic operation of equipment operation history

Save and report output is automatically supported.

Efficient work processing is possible. In addition, the degree of deterioration of the facility can be predicted in advance.

Therefore, there is an advantage that the plan for the maintenance of the facility can be established in advance.

Second, the reduction of the maintenance cost is to maintain the function of the filter medium (1) by measuring the differential pressure

Therefore, the filter filter 1 has an effect of extending the life of about 20%.

Therefore, one repair cost (filter media @ 20,000 won / time x 10Line / unit x

10ea / line = 2,000,000 won) + (Replacement cost -500,000 won) = 2,500,000 won / time.

The total cost is KRW 2,500,000 / time

It is expected to cost 2 units x 2 units x 4 units = 20,000,000 won / year.

Therefore, maintenance costs of 20,000,000 won / year x 0.2 = 4,000,000 won / year

Savings are expected.

third. Power savings are reduced by 20% reduction in diaphragm valve operation.

Reduced air production costs, reduced power costs with a 60% reduction in run time of the bottom discharger,

Savings from early detection of compressed air leakage. The facility

Based on the calculation, compressed air manufacturing cost savings 22.5kw x 22h x 63.9 won x

35 days x 0.2 = KRW 47,900 / month, savings on operating equipment cost (0.475 + 2.2)

kw x 4 units x 22h x 63.9 won x 35 days x 0.6 = about 218,400 won / month

A monthly savings of W266,300 is expected.

fourth. As the driving ratio of the equipment is lowered, the lifespan of various driving devices is extended.

It works. Considering external factors, the discharger has a 30% longevity effect.

As the life expectancy of the driving device is five years, the savings are KRW 2,500,000 / unit x

4 units x 0.2 / year x 0.3 = 600,000 won / year = 50,000 won / month

It is expected. Therefore, even without considering labor costs, the total savings are (266,300).

+ 50,000) x 22 = 2,595,600 won / year + 4,000,000 won / year = 6,595,600 won / year

Savings are expected.

In addition to the above savings, hardware communication is based on RS485.

Expansion of the local control unit 33 under the network control unit 32

Expansion of hardware at the time of expansion of sensor and drive unit under control unit 33 and

Expansion is possible only by changing the setting, so it can secure scalability and economy.

In addition, since the control information is judged by software, it is possible to add new information,

It is possible to secure the convenience of updating by adding control options and changing the analysis method.

Claims (1)

The suction fan sucks in the vacuum and discharges clean air through the filter media. Cleaning is performed by blowing compressed air in the direction opposite to the flow direction of the vacuum air. In the control method of the filter dust collector to measure, the pressure loss of the filter medium, the pressure Control-related information including measured values of pressure changes in the tank and compressed air injection conditions. Output for the purpose of collecting hardware configuration and operating device control By using the collected information and the configuration of hardware, including hardware The pressure loss of the filter medium is controlled by controlling the injection of back pressure pressure air. Keep constant and analyze the shape of the pressure change in the compressed air tank It is judged whether the discharge line is leaked, and the dust collector Filtration including software to control the operation of attached devices Remote automatic control system for dust collector