Method for determining moisture content of gravimetric sludge

The rapid detection of water content before and after dewatering of different sewage sludges is simple, convenient and rapid, and can be applied to electroplating sludge drying, paper sludge drying, oil field sludge drying, chemical sludge drying, slime drying, and pomace drying. Determination of moisture before and after drying of high-humidity materials such as bean dregs drying, slag drying, and peat drying. Moisture content is an important factor to measure whether sludge dewatering is up to standard. Therefore, whether it is sewage treatment plant or industrial sludge treatment in various industries, the degree of sludge dewatering should be controlled to achieve sludge treatment. Through a number of sludge-related environmental protection policies, it has been learned that different departments have different regulations on the degree of sludge dewatering and the sludge moisture content after treatment. In China, the sewage treatment plant sewage treatment plant needs to be treated to a moisture content of less than 60% before it can be transported to the factory for resource utilization. Therefore, the moisture content of the filtered sludge cake needs to be quickly tested, and all meet the requirements of environmental protection policy. Sewage companies solve environmental problems.

Environmental sludge moisture content detector function:

Shenzhen Guanya LCD screen sludge moisture content detector is composed of weighing unit and heating unit, which is based on the principle of drying weight loss to determine the moisture content of the sample. This principle is the basis for measuring the moisture content of the sample. It can measure the water content of almost all samples. Regardless of its type and shape, the Lecht moisture meter is the choice of the moisture content of the test sample. The test principle satisfies the GB/T 29249-2012 electronic scale. Measuring method for moisture drying.

The sludge moisture content measuring instrument conforms to Table 18 of GB 18918-2002 “Emission Standards for Pollutants in Urban Sewage Treatment Plants”. “Sludge Characteristics and Pollutant Monitoring and Analysis The recommended method for determining the moisture content of sludge is “Monitoring and Analysis of Urban Waste Agriculture” Method and GBT 24602-2009 "Urban Sewage Treatment Sludge Disposal List * Incineration Mud" Recommended standard method for determining sludge moisture content is CJ/T221-2005 "Urban Sewage Treatment Plant Sludge Inspection Method".

"Guanya brand" environmental sludge moisture content detector product advantages:

â—† Small size, light weight and simple structure;

â—†No auxiliary equipment is needed, and the sample tray can be recycled by using 304 stainless steel.

â—†Easy operation, no need to install and debug training;

â—†High efficiency, fast speed, the overall operation does not exceed 10 minutes;

Environmental sludge moisture content detector? Technical indicators

1, weighing range: 0-60g

2. Moisture measurement range: 0.1%-100%

Dry weight measurement range: 100-0.1%

Test space is 2cm (special)

3, test mode: fast

4, weighing calibration error range: 0.02g

5, sample quality: 0-60g

6, ★ heating temperature range: current ambient temperature -210 ° C

Temperature error: ±0.5 °C

Temperature resolution: 0.1 ° C

7, heating source: special 400w annular heating source

8, water content readability: 0.01%.

9, ★ display: color 7 inch LCD touch screen

10, temperature window: real-time display of the current ambient temperature

Ambient temperature display error: ±0.5 °C

11, ★ display parameters eight kinds: moisture value (%), dry weight (%), current temperature (°C), set temperature (°C),

Current weight (g), initial weight (g), test time (S), discrimination time (S)

12, dual communication interface: RS 232 (print); USB (computer) (optional accessories)

13, operating mode: full screen touch

14, screen resolution: 800x480

15. Dimensions: 380×205×325 (mm)

16, power: 220V

17, frequency: 50Hz ± 1Hz

18, net weight: 4.5Kg

19. Sample temperature: -40 ° C - 50 ° C;

20, working environment temperature: -5 ° C -50 ° C;

21, relative humidity: ≤ 80% R Η;

Environmental sludge moisture content tester

Method for determining the moisture content of gravimetric sludge:

Filter paper preparation

The quantitative filter paper was transferred to an oven and dried at 103-105 ° C for half an hour, then taken out and placed in a desiccator to cool to room temperature, and weighed. Repeat drying, cooling, weighing, until the weight difference between the two weighings ≤ 0.2 mg, recorded (W1). Place the constant weight filter paper in the balance tray.

Sampling and weighing about 20 grams of sludge, after reaching a constant weight, record the weight W2, then the sludge weight W = W2-W1, drying

Bake in the oven at 105 °C for about 2 hours, put it in the desiccator for 30 minutes and cool to room temperature. Then weigh the data and weigh it for 2 hours. Until the weight weighed, it is called constant weight W3. Or the weight difference between two weighings ≤ 0.4mg). Moisture weight = W2- W3. Water weight / W * 100% = moisture content.

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