Water quality micro-monitoring station

1. Product introduction ofwater quality micro monitoring station:

The water quality micro-monitoring station is also called a micro-automatic water quality monitoring station. The water quality micro-monitoring station is a small device used to monitor water quality. It meets the online monitoring of urban river water quality and solves the problem of the large area and infrastructure investment of conventional automatic water quality monitoring stations. Advanced questions. In response to the national strategic policy on strengthening environmental protection, maintaining the balance of natural ecology, and promoting the sustainable development of the national economy, and based on market needs, our company independently developed and produced the outdoor small automatic water quality monitoring station FT-WMSM, which combines the methods stipulated in the national standard with advanced Combining advanced computer technology, the measurement process is fully automated and can be widely used for surface water quality monitoring in rivers and lakes.

The factors causing eutrophication of surface water are mainly chemical factors such as N, P, organic matter, and HN4- in the water body. Therefore, monitoring chemical indicators such as total phosphorus, total nitrogen, ammonia nitrogen, chemical oxygen demand, and permanganate index of surface water has been It has become a necessary task to coordinate with the simultaneous monitoring of five conventional parameters (dissolved oxygen, turbidity, conductivity, temperature, pH) to comprehensively reflect water environment indicators.

2. Monitoring principle of water quality micro-monitoring station:

The water quality micro-monitoring station adopts an integrated design principle and includes a water collection and distribution system, a detection unit (five measurement modules for total phosphorus, total nitrogen, chemical oxygen demand, permanganate index, ammonia nitrogen, and five conventional parameters), and a quality control unit. , auxiliary units (waste liquid collection, lightning protection, air conditioning, etc.). The core unit is the detection unit, total phosphorus, total nitrogen, chemical oxygen demand, permanganate index, ammonia nitrogen, chemical analysis methods that strictly follow the national standards. Conventional five parameter indicators (dissolved oxygen, conductivity, turbidity, temperature, pH) are measured using multi-electrode integration.

3. Main specifications and standards for water quality micro-monitoring stations:

According to the design documents, equipment, materials and construction must meet the requirements of the current engineering construction standards and specifications of the People's Republic of China and provinces, autonomous regions, municipalities or industries. The technical standards and specifications followed by this project are as follows:

(1) "Technical Specifications for Monitoring Total Water Pollutant Discharge"

(2) "Water and Wastewater Monitoring and Analysis Methods" (Fourth Edition)

(3) "Environmental Water Quality Monitoring Quality Assurance Manual"

(4) "Technical Specifications for Surface Water and Sewage Monitoring" (HJ/T91-2002)

(5) "Technical Guidance on Water Quality River Sampling" (HJ/T52-1999)

(6) "Technical Requirements for Chemical Oxygen Demand Water Quality Automatic Analyzers" (HJ/T377-2007)

(7) "Technical Requirements for Automatic Water Quality Analyzers with Permanganate Index" (HJ/T100-2003)

(8) "Technical Requirements for Automatic Ammonia Nitrogen Water Quality Analyzers" (HJ/T101-2003)

(9) "Technical Requirements for Total Nitrogen Water Quality Automatic Analyzer" (HJ/T 102-2003)

(10) "Technical Requirements for Automatic Total Phosphorus Water Quality Analyzer" (HJ/T 103-2003)

(11) "Technical Requirements for Automatic pH Water Quality Analyzers" (HJ/T96-2003)

(12) "Technical Requirements for Automatic Conductivity Water Quality Analyzers" (HJ/T97-2003)

(13) "Technical Requirements for Automatic Turbidity Water Quality Analyzers" (HJ/T98-2003)

(14) "Technical Requirements for Automatic Dissolved Oxygen (DO) Water Quality Analyzers" (HJ/T99-2003)

(15) Relevant national and industry standards and specifications

(16) "Environmental Protection Industry Standard of the People's Republic of China" (HJ/T98-2003)

(17) "Building Lightning Protection Design Code"

(18) "Design Code for Power Supply and Distribution System"

4. Product features of water quality micro monitoring station:

1. The integrated automatic water quality automatic monitoring station is adopted, which can measure multiple elements at the same time;

2. A variety of analysis and detection units with low detection limits, meeting the requirements for online surface water monitoring;

3. The water collection and distribution unit has water sample pretreatment and backwash functions, low failure rate and easy maintenance;

4. Optional UPS uninterruptible power supply ensures that the water station can complete the cleaning process in the event of a power outage;

5. Optional video surveillance equipment has real-time remote monitoring function and realizes all-round monitoring;

6. It occupies a small area, and the whole machine occupies an area of ≤2m2;

7. Equipped with waste liquid separation and waste liquid collection units.

8. Suitable for the collection of waste liquid for more than two weeks; equipped with lightning protection unit to ensure stable and reliable operation of the system;

9. Intelligent constant temperature system, equipped with cabinet-type heating and cooling air conditioners, ensures that the water station operates at the specified operating temperature.

5. Technical parameters of water quality micro-monitoring station:

project	Total phosphorus, ammonia nitrogen, total nitrogen, chemical oxygen demand, permanganate index parameter performance indicators
	total phosphorus	Ammonia nitrogen	total nitrogen	Cod	permanganate index
Reference standard	GB11893-89	HJ/536-2009	HJ 636-2012	HJ828-2017	GB11892-89
Measuring range	0.02~2mg/L (expandable)	0.1~5mg/L (expandable)	0.1~10mg/L (expandable)	15~2000mg/L (expandable)	0.5~20mg/L (expandable)
The detection limit	≦0.01mg/L	≦0.10mg/L	≦0.1mg/L	≦15mg/L	≦0.1mg/L
drift	±5%	±5%	±5%	±5%	≦0.5mg/L
Precision	≤5%	≤5%	≤5%	≤5%	±5%
Indication error	±5%	±5%	±5%	±5%	≤5%
Voltage effect	±10%	±5%	±10%	±5%	±5%
Temperature effect	±5%	±5%	±5%	±5%	±5%
consistency	≥90%	≥90%	≥90%	≥90%	±5%
The sampling period	Time interval (20~9999min, arbitrarily adjustable) and hourly measurement mode
Calibration period	Adjustable at any time and at any interval from 1 to 99 days
Maintenance cycle	Usually once a month, about 60 minutes each time

Conventional five-parameter technical indicators of water quality micro-monitoring station:

Five parameter performance indicators
Measurement methods	pH	Dissolved oxygen	Conductivity	Turbidity	temperature
	glass electrode method	Fluorescence quenching method	Four-wire electrode method	90 degree scattered light method	Thermal resistance electrode method
Reference standard	GB/T6920-86	GB/T11913-89	GB/T6908-201	GB/T13200-91	GB/T13195-91
Measuring range	0～14	0mg/L～20mg/L	0ms/m～500ms/m	0NTU～1000NTU	0～50℃
drift	±0.1pH	±0.3mg/L	±1%	±5%	——
Precision	≤0.1pH	≤5%	≤1%	≤5%	——

Indication error	±0.1pH	≤5%	±1%	±5%	——
Voltage effect	±0.1pH	≤0.3mg/L	±1%	±5%	——
Temperature compensation accuracy	±0.1pH	±0.3mg/L	±1%	——	——
water temperature error	——	——	——	——	±0.2℃
Calibration period	Usually twice a month
Maintenance cycle	Usually once a month, about 30 minutes each time

Water quality micro-monitoring station parameters:

Machine parameters
control unit	ARM9 embedded industrial control system
Display unit	15-inch color touch screen control
Temperature Control System	Equipped with dual-purpose air conditioning
UPS regulated power supply (optional)	Optional UPS uninterruptible power supply can complete this measurement and cleaning process in the event of a sudden power outage.
Lightning protection unit	With lightning protection capability
Power requirements	AC 220V±22V, 50Hz±0.5Hz
Communication Interface	2 channels RS485, support 4G wireless transmission
Total power	≦2500W (including the maximum power when the external pump and air conditioner are working)
ambient temperature	(5~40)℃
Dimensions	Height 1900mm×Width 1480mm×Depth 960mm
water station weight	300kg

6. Water quality micro-monitoring station configuration list

serial number	product name	quantity
1	Stainless steel outdoor cabinet (including air conditioning)	1 set
2	Electrical unit (PLC, relay, circuit breaker, switching power supply, lightning protection)	1 set
3	Display unit (including 15-inch large screen, microcomputer control program)	1 set
4	Water collection unit (pipe, sampling pump, float)	1 set
5	Water distribution unit (electric ball valve, pipes)	1 set
6	Pretreatment unit (flow cell, level sensor, pressure sensor)	1 set
7	permanganate index	1 set
8	COD online monitor (optional)	1 set
9	NH3N online monitor	1 set
10	TP online monitor	1 set
11	TN online monitor	1 set
12	Five parameters (oxygen decomposition, conductivity, turbidity, temperature, pH)	1 set
13	Digital acquisition instrument	1 set
14	Chemical reagents (240 times/month) free of charge	1 set