Application of easy-drive inverter in bag dust removal equipment

In recent years, with the rapid development of the economy, the boilers with raw coal as fuel have increased a lot. The air pollution emitted by coal-fired boilers has caused great harm to the surrounding environment. However, the main way to reduce or reduce the pollution of coal-fired boilers is to cooperate with boilers. A variety of smoke and dust collectors are equipped, and the performance and efficiency of the dust collector are the key to determining the degree of damage to a surrounding environment caused by a boiler or kiln. Bag dust removal equipment is widely used in this industry.

The bag dust removal device is provided by a dust-containing gas inlet to purify the flue gas outlet, and the body structure is composed of an intake pipe, an inlet chamber bag chamber, a ash hopper, a ash discharge valve, an outlet pipe, an anti-drying system and a cleaning control system. The main body of the dust collector is made of all-steel structure and designed with anti-thermal expansion mechanism. The outer casing is made of LBY-type lightweight rock wool board with double insulation, and the outer surface is а=0.5 galvanized sheet protection. It is installed with new rivet technology and cold stamping for flower board. The pressure rolling forming process not only increases the strength but also ensures the quality of the equipment. The dust collector adopts the high temperature resistant glass fiber bag treated by RH formula, which has good flexural resistance, wear resistance, strength and thermal shock resistance.

For a long time, no matter which stage of operation the equipment is in, the dust generated by the dust removal fan is running at full speed, and the inlet baffle opening degree is adopted, which has low efficiency and large power, resulting in a large amount of electric energy wasted. As the market competition continues to intensify. Energy conservation and consumption reduction, and improving production efficiency have become one of the effective means for enterprises to develop competition.

The following is the system integration energy-saving transformation of Yishang Company on the bag dust removal equipment of a company in Panzhihua, Sichuan:

The system is a set of 10×8 and a set of 8×8 environmental dusting pulse valve control system.

A system overview:

This system is designed and developed by Easy Drive Company to provide a multi-channel environmental dust removal valve and blow valve control system. It applies advanced high-tech means to complete the integrated control task of multi-channel environmental dust removal valve and injection valve, fundamentally solves the problems existing in the common separation electronic original device, fully meets the improvement and injection process, rationalization and scientific aspects. The requirement is that this is a brand-new modern enterprise environmental dust control process control method. And to meet the requirements of system integration control.

The second system consists of:

The whole system consists of central control core unit PLC-programmable controller (Japan Mitsubishi FX1n-40MR) Omron control relay, France Schneider bipolar open, France Schneider operation button, isolation diode 1N4007, DC24V DC power supply and cylinder lift valve, dust discharge The valve is composed of a blow valve and the like. The components of the control system are all integrated in one control cabinet.

Three main technical indicators:

3.1 Control power supply:

AC power: 220VAC ± 10%; 10A

DC power supply: 24VDC ± 10%; 15A

3.2 Frequency: 50HZ

3.3 Power consumption: 250VA

3.4 Working environment:

Ambient temperature: -10--+60°C

Relative humidity: <85% (no condensation)

3.5 input interface: 12 points, NPN type, 24VDC, optical isolation

3.6 output interface: 13 points,

Relay contact, 2A, photoelectric isolation 3.8 Lifting interval: 0-10 (minutes) adjustable, factory setting 2 minutes

3.9 blowing interval: 0-25 (seconds) adjustable, factory setting 3.0 seconds

Fourth, the system features:

Through the programming and setting of the PLC, the system has the following functions:

4.1 Manual/automatic duplex control for lifting and blowing:

4.1.2 Manual mode

In the manual mode, the system administrator can realize the point-to-point operation of the dust removal poppet valve and the pulse valve. The manual selection of the warehouse number and the valve number is required, which greatly facilitates the maintenance of the system maintenance personnel and greatly facilitates the system. The administrator makes a judgment on the dust removal effect of the system.

4.1.2 Automatic mode

In the automatic mode, the whole system is in closed-loop control, no human intervention is required, and the system will complete the pre-set process according to the factory-set upgrade and blowing time. When it is necessary to modify the lifting and blowing During working hours, you only need to use a screwdriver to simply adjust the PLC potentiometer externally. This greatly saves manpower and improves the efficiency of the system.

4.2 Scalable features:

In addition to the high cost performance of the PLC used in this system, it also has the expandability of multi-way valve control.

Extensibility; that is, the expansion of the number of control groups without increasing the number of PLC input points, thus saving equipment costs. In addition, the working current of the solenoid valve is provided by the safety protection method, thereby improving the service life of the lifting and the blowing valve, thereby ensuring the reliability and stability of the system operation.

5.1 system induced draft fan motor: rated power 400KW

Quadrupole motor

Rated current 776A

Rated voltage 380V

Rated frequency 50HZ

5.1.1 Bag blowing ash air compressor motor: rated power 7.5KW three

Rated current 15.8A

Rated voltage 380V

Rated frequency 50HZ

5.2 Use the easy-drive ED3100-4T4000M, ED3100-4T0075M general-purpose inverter.

5.3 The control circuit diagram is as follows:

5.4 The equipment works well after the transformation.

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