Moisture content measuring instrument, method for determining moisture content

**Moisture content is a key data in oil extraction, transportation and oil trading. The measurement of oil well water cut is of great significance for the construction of digital oilfields such as water production, oil production horizon, estimated production, development life of oil wells, production quality control of oil wells, oil well status detection, and water injection operations.

Most of the water cut measurement of wellheads in domestic oilfields adopts manual sampling measurement method. This method relies heavily on the representativeness of sampling points and the reliability of manual operation, and there are many influencing factors in the measurement results, which cannot be applied to well conditions with frequent changes in water cut, and has the disadvantages of time-consuming and labor-intensive. The manual sampling measurement method cannot be used for real-time measurement of the first measurement system, and can not meet the requirements of automatic management of oilfield production, and has great limitations in determining the water injection scheme, calculating the first production, and the development life of the first oil well.

In the past, the traditional moisture measurement method was through the drying method, and then according to the formula of the weightlessness method: [moisture content = (mass of the object before weightlessness - mass of the object after weightlessness) The moisture content of the object before weightlessness was manually calculated, and the moisture content calculated by this method was very inaccurate, and the measurement results were easily affected by various factors, resulting in unstable measurement data.

With the rapid development and maturity of computers, communications, software, new materials and new technologies, artificial intelligence and advanced measurement have become possible, making moisture measuring instruments intelligent, digital and automated. In recent years, the best moisture measuring instrument can be seen everywhere and has been widely used in various industries, and the traditional moisture analyzer and moisture measurement method with large measurement errors have been slowly eliminated.

At present, the mainstream modern moisture measurement technology, mainly including MS-590** microwave moisture measuring instrument and MS-580** near-infrared moisture measuring instrument, not only has high measurement accuracy, but also is fast and efficient, and is deeply recognized and favored by users, and rave reviews.

Moisture content meter, what product are you measuring, in the first use, Shenzhen Agri moisture content meter one-button operation, small and flexible, want to measure**test**, is your first and only choice.

1. This method is suitable for coarse-grained soil, fine-grained soil, organic soil and frozen soil.

2 Test Procedure:

1) take a representative sample of 15 30g or a sample in a ring knife, organic soil, sand soil and monolithic structure permafrost are 50g, put them into the weighing box, cover the box lid, weigh the quality of the humidified soil in the box, and be accurate to.

2) Open the lid of the box, place the box in the oven, and bake at a constant temperature of 105 110 to a constant weight. The drying time shall not be less than 8h for clay and silt, and shall not be less than 6h for sandy soil, and the soil containing organic matter more than 5% of the dry soil mass shall be controlled at a constant temperature of 65 70 to constant weight.

3) Take out the weighing box from the oven, cover the box lid, put it in a drying container and cool it to room temperature.

3 The water chain rate of the test is 0, calculated according to the following formula, and is accurate to;

0=(m0/md-1)×100

where: md - dry soil mass (g);

m0 – the mass of the wet soil (g).

4. The permafrost moisture content test of layered and reticulated structures should be carried out according to the following steps: 1000 2000g samples are cut by the quarry method (depending on the uniformity of the permafrost structure, and the structure is uniform and less is taken, and more is taken on the contrary) and put it into the enamel tray, and the quality of the plate and the sample is weighed accurately. After the frozen soil sample is thawed, it is adjusted into a uniform paste (when the soil is too wet.

Excess water is allowed to evaporate naturally or sucked out with a suction ball, but the soil particles must not be brought out; When the soil is too dry, water can be added appropriately), weigh the quality of the soil paste and the plate, accurate to. Sampling from the paste-like soil to determine the moisture content, and the test steps and calculations are carried out in accordance with Article 1 of this standard.

5 The moisture content of layered and reticulated permafrost should be calculated according to the following formula, and it should be accurate to.

The methods for detecting the moisture content of soil are:

1. The drying method is suitable for determining the moisture content of clayey soil, Huzen silty soil, sand soil, sand gravel, organic soil and frozen soil.

2. The alcohol combustion ballast zone method is suitable for the simple determination of the moisture content of fine material soil (except for soil containing organic matter).

3. The specific gravity method is only applicable to sand soils. Originally, there was also the calcium carbide barometric method, which is rarely used now.

Difference between moisture content and water contentMoisture content is a ratio that refers to the ratio of the amount of water contained in a substance to the total weight of a substance, that is, the mass of water in a substance as a percentage of the mass of the substance. Water content refers to the weight of the water contained in an object.

Water content refers to the total amount, and moisture content is a percentage, the two are different concepts, and water content may be used instead of water content in many irregular occasions. However, in terms of specification, the moisture content is used to express the percentage of water content of the object, and the water content is used to express the weight of the water content of the object. In many cases, moisture content and water content are the same thing.

Water content is a reference in the old standard, and now the new standard is called moisture content.

Microwave moisture meter and near-infrared moisture meter are suitable for trucks, belts, conveyor belts, dryers, mixers, sintering machines, hoppers, storage silos, pipelines, screw conveyors, chutes, mine troughs and other working conditions, and are widely used in grain, feed, building materials, coal, pharmaceutical, food, sugar, daily chemical, papermaking, tobacco, metallurgy, petroleum, ejiao, textile, electric power, chemical and other industries raw material moisture detection, production process moisture testing, as well as product quality control and other process links.

Water content is the amount of water contained in a water-containing substance as a percentage of the total weight of the substance (water content by weight) or the volume of water contained as a percentage of the total volume of the substance (volumetric water content). The moisture content refers to the amount of water in the textile material measured under the specified conditions, and is expressed as the percentage of the difference between the pre-drying quality and the drying quality of the sample. To put it simply:

Wet weight-dry weight) Dry weight 100% moisture content is the percentage of free water mass in the soil to the total mass of the soil. It is not the same concept as water content.

1. Take the disturbed soil sample of the undisturbed soil or the production service, level both ends, coat the inner wall of the ring knife with a thin layer of petroleum jelly, put the cutting edge downward on the soil sample, press the ring knife vertically down to the depth of the cutting edge, use the soil cutter (or wire saw) to cut the soil sample into a soil column slightly larger than the diameter of the ring knife, and cut it while pressing until the soil sample stretches out of the top of the ring knife, and flatten the remaining soil at both ends;

2. Determine the moisture content with a representative soil sample cut down;

3. Wipe the outer wall of the ring knife, weigh the quality of the ring knife and soil, and be accurate to;

4 Calculate the sample density and dry density as follows: (2-3) (2-4) where: - Specimen density, in g cm3; --Sample dry density, unit: g cm3;

Ring knife plus sample mass, unit g; --Ring knife mass, unit g; --Ring knife volume, unit: cm3; --Moisture content of the sample, unit.

5. Carry out two parallel measurements according to the steps of 1 to 4, and the parallel difference shall not be greater than that, and the arithmetic mean value shall be taken as the test result.

The weighing method, also known as the drying method, is the only method that can directly measure soil moisture, and it is currently the international standard method. Take the soil sample with a soil drill, weigh the weight of the soil sample with a precision balance, record the wet weight m of the soil sample, bake the soil sample for 6 8 hours to constant weight in the oven of 105, and then measure the dry weight of the soil sample, record the dry weight ms of the soil sample Soil moisture content = (aluminum box and soil sample quality before drying - aluminum box and soil sample quality after drying) (aluminum box and soil sample quality after drying - dry empty aluminum box quality) * 100%.

Tensiometer. Also known as the negative pressure gauge method, it measures soil water suction.

Inserted into the soil, it is displayed on the instrument.

Summary. Hello, dear, I've kept you waiting, and now I'll answer for you. The general display shows that there is a problem with the temperature control sensor.

Usually the portable moisture content detector has a large error in the detection process, the equipment should be broken, and the manufacturer should be repaired, but there is no maintenance value if the instrument fails, you can buy a Shenzhen Guanya SFY series moisture detector, one-button operation, simple and fast, and the moisture value can be compared with the national standard.

Hello, dear, I've kept you waiting, and now I'll answer for you. Generally, the lack of display chain shows that there is a problem with the temperature control sensor. Usually the portable moisture content detector has a large error in the detection process, the equipment should be broken, and the manufacturer should be repaired, but there is no maintenance value if the instrument fails.

The water content rapid tester is mainly composed of the main bold tank of the instrument, the main tank cover, the fastening device, the filter, the leakage crushing ball, the sealing gasket, the water content meter, etc.

Weighing method. Also known as the drying method, this is the only way to measure the soil directly.

The moisture method is also the current international standard method.

Take a soil sample with a soil drill and use.

Balance weighing with precision.

The weight of the soil sample is recorded as the wet weight m of the soil sample.

The soil sample will be baked in the oven 6 8

hours to constant weight, then the drying soil sample is measured, recorded as the dry weight of the soil sample.

MS soil moisture content = (aluminum box and soil sample before drying.

Quantity - Aluminum box and soil sample quality after drying) (Aluminum after drying.

The quality of the box and soil sample - the quality of the drying empty aluminum box) * 100% tensiometer method. Also known as the negative pressure degenerate slide gauge method, it measures soil water suction.