On line monitoring system of dust concentration

1、 Background:

Dust refers to small solid particles that can be suspended in the air for a long time. A large amount of dust can be produced in various production and living activities of human beings, and the differentiation and corrosion of nature will also produce dust with the flow of gas. Due to different particle sizes of dust, different parts entering the human respiratory tract, and different hazards to the human body, the dust is also divided into total dust and respiratory dust.

If a person inhales some productive dust for a long time, it may cause chronic systemic disease pneumoconiosis, mainly pulmonary fibrosis, rhinitis, pharyngitis, bronchitis and other diseases, which is very harmful to the human body; After falling, the dust formed in production floats in the air again due to air flow or mechanical vibration, which can form secondary dust. If their content exceeds the atmospheric self purification capacity and cannot be adjusted naturally, haze will occur.

Therefore, in recent years, the state has successively issued the Environmental Protection Law of the People's Republic of China, the Regulations on Ecological Environment Monitoring, the Outline of Ecological Environment Monitoring Plan (2020-2035) and other laws and regulations, which have clearly stipulated the dust concentration and monitoring equipment indicators in different industries.
2、 System introduction

The online dust concentration monitoring system built by our company is composed of equipment layer, field control layer, data exchange layer and centralized monitoring layer, which can monitor and remotely manage the total dust concentration and respirable dust concentration in real time.

3、 System Design Criteria

The online dust concentration monitoring system is designed and manufactured in strict accordance with the following national standards and specifications:

GB3836.1-2010 Explosive Dust Atmospheres - Part 1: General Requirements for Equipment

GB3836.4-2010 Explosive Dust Atmospheres - Part 4: Intrinsically Safe "i" Protected Equipment

MT163 - 1997 General Technical Conditions for Direct Reading Dust Concentration Measuring Instruments

Enterprise standard XKCON-GCG1000 Dust Concentration Detector (Q/XK 001-2022).
4、 System composition

The online dust concentration monitoring system is mainly composed of a dust concentration detector on the equipment layer, a main control cabinet on the field control layer and a monitoring and dispatching center. The equipment layer and the field control layer are acquisition terminals, and the monitoring layer is a software dispatching system.
1. Hardware products
（1）Dust concentration detector (model: XKCON-GCG1000)

XKCON-GCG1000 dust concentration detector is composed of sampling head, detection device, single chip computer system and air extraction system. It uses the light scattering principle to detect the total dust concentration and respiratory dust concentration, and can accurately and timely display the current dust concentration in the workplace. It is applicable to coal mines and other explosive hazardous working environments, construction sites and other places that have environmental requirements and need dust monitoring.

XKCON-GCG1000 dust concentration detector is simple to operate by calibrating and setting various parameters through infrared remote control; The detector performs data calculation on the dust mass concentration through the microprocessor, and the equipment has its own LCD for direct reading of data. At the same time, it provides remote interfaces to report the data to the software dispatching system of the monitoring layer in the form of RS485, 4-20mA and other interfaces.

Main technical parameters of XKCON dust concentration detector
model	XKCON-GCG1000
Ambient temperature and humidity	-20~ 40℃，≤95%RH	Ambient atmospheric pressure	86 kPa~110kPa
measuring range	0mg/m ³~ 1000 mg/m ³ (Support customization)
measurement error	≤±10%	Sampling flow	2L/min
output signal	RS485 or 4-20mA current output
working voltage	12-24VDC (intrinsic safety)	Operating current	≤100mA
size	320x180x100mm	weight	1.6kg
Explosion proof type	Intrinsically safe
Explosion proof sign	Ex ib II C T6 Gb；Ex ibD 21 T80℃

（2）Explosion proof main control cabinet (model: XKCON-TM-W-156)

The explosion-proof main control cabinet (model: XKCON-TM-W-156) XKCON-TM-W-156 is an explosion-proof multi-functional intelligent monitoring host developed by our company; The main control panel of the main control cabinet uses XKCON-MC-B-V41 main control panel independently developed by our company, which meets the industrial design standards and has the patent and software copyright certificate of independent intellectual property rights (registration number: 2018SR382811); It can be applied to industrial sites with explosion-proof requirements such as coal mines, power plants and petrochemical plants for data acquisition, processing, display and data transmission, as well as alarm threshold setting for abnormal data alarm.

model	XKCON-TM-W-156
Explosion proof sign	Ex d ⅡC T6 Gb ；Ex tD A21 IP68 T80℃
Degree of protection	IP68
temperature range	-40℃～60℃
relative humidity	≤95%（+25°C）
atmospheric pressure	80kpa～106kpa
Supply voltage	220V  AC with circuit breaker and fuse protection
Current output	24V/10A
power	≤ 240W
Installation method	Wall mounted installation
weight	50kg

Xiangkong explosion-proof main control cabinet XKCON-TM-W-156 has the function of data display. It displays real-time data through its own 12 inch color touch screen; The equipment is equipped with 4G capacity data memory, which supports data storage and query of historical data and alarm records; Built in industrial power module, high safety; The alarm threshold setting is supported, and the monitoring data is uploaded to the remote monitoring software in real time to achieve remote monitoring< br /> Main functional features of explosion-proof main control cabinet XKCON-TM-W-156:

The host adopts a unique ID number, which is easy to manage and identify, and can connect to various transmitters and software platforms of our company;

It has two 485 interfaces, which can be configured as a Modbus RTU master station or slave station. It can access all types of 485 transmitters of our company, and automatically identify whether the RS485 interface slave device works normally;

It has one RJ45 network port, which can upload the host monitoring data to the remote monitoring software platform;

It has 1 channel 232 interface, and can parse messages according to customer requirements;

Support 8-way switch isolated dry contact input;

Support 6-way relay contact output, normally open and normally closed output;

Support 6-way 4-20mA, 0-5V analog signal input;

Support 1 channel of audible and visual alarm output interface, and give an alarm for abnormal conditions on site;
2、Communication mode

Xiangkong explosion-proof main control cabinet XKCON-TM-W-156 realizes data connection with the monitoring and dispatching center through Ethernet, RS485, RS232, 4-20mA, 0-5V and other communication methods.
3、 Monitoring and dispatching center

The monitoring and dispatching center is mainly composed of a central server and system software, which is responsible for analyzing, storing and releasing various dust data uploaded from various dust concentration collection terminals on the site, and issuing various control instructions or warning information to various monitoring stations.
5、 Functions of online dust concentration monitoring system
1. Industrial explosion-proof: XKCON-GCG1000 dust concentration detector is intrinsically safe for mining, and the explosion-proof sign is Ex ib II C T6 Gb/Ex ibD 21 T80 ℃; Xiangkong explosion-proof main control cabinet XKCON-TM-W-156 has protection grade of IP68 and explosion-proof mark of Ex d Ⅱ C T6 Gb; Ex tD A21 IP68 T80℃。

2. High precision monitoring: XKCON-GCG1000 dust concentration detector adopts the measurement unit imported from abroad, which is sensitive and can detect the total dust concentration and respirable dust concentration in the environment with high precision, and the measurement error is ≤± 10%.
3. Remote monitoring: XKCON-TM-W-156 explosion-proof main control cabinet sends data to the system software of the monitoring and dispatching center through the communication cable. After logging in the software, managers can view real-time data, historical data, alarm data, and analyze, store or release various dust data.

4. Abnormal alarm: XKCON-TM-W-156 explosion-proof main control cabinet sets the data alarm threshold on the touch screen. When the real-time value exceeds the limit, the audible and visual alarm provided by the detector and the main control cabinet will automatically alarm; The system software of the monitoring and dispatching center will also display the color change through the numerical value, indicating that the value exceeds the limit.
5. Intelligent linkage: In case of abnormal values, the monitoring and dispatching center will issue various control commands to each monitoring station, and the Xiang Control explosion-proof main control cabinet XKCON-TM-W-156 will be controlled by its own 6-way relay contacts, and automatically linkage systems such as spraying, etc. to carry out dust removal.
6、 Supplement

The online dust monitoring system transmits data through the network. The monitoring and dispatching center can obtain terminal monitoring data in real time and accurately. After data comparison, analysis and quick judgment, it provides accurate numerical basis for enterprise safety production.

In addition, our online dust monitoring system supports local operation of equipment, customized development of functions, message analysis and customization of various functions. For more information, please call 0531-61360166 and 61360266.