Boiler drum level gauge

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Boiler drum level gauge has full process level accurately under the condition of continuous measurem…

Products overview:

ZW - BGL seriesBoiler drum level gaugeIs advanced, which has the function of the entire measurement automatically compensate capacitance detection technology.It solves the traditional capacitive liquid level gauge measurement system to overcome large temperature drift, the dielectric constant changes in the measured medium to measure the impact of large, poor test linear and requires human on-site calibration and so on.To the boiler steam drum water level achieve all condition of safety, reliable, accurate measurement and control, to ensure the safety of boiler, high efficiency, energy saving operation.Can be widely used in all kinds of industrial steam drum, plus, low and high, conversion furnace such as liquid level measurement and control of pressure vessel.

In the process of running a bit is not affected by dielectric constant change, the boiler temperature, steam jamming is no effect on the liquid level meter, such as its measurement precision reached more than one over one thousand, long-term stability is very good, almost no drift, comprehensive performance is incomparable to other measurements, it is a full process, high precision, high reliability of boiler liquid level gauge.

The importance of the boiler steam drum water level measurement is well known, however the boiler steam drum water level for a long time continuous measurement technology adopted balance container type (differential pressure type) there are many failed to improve the method of measurement of defects, mainly embodied in the following aspects:

1, can't implement all condition survey, there are "false water level" measurement, rev, stop, emptying in boiler, a platoon, accident to establish stable and unstable operating condition differential pressure condition for a long time, for a long time or simply can't establish normal differential pressure, need human intervention.

2, under the condition of the stability conditions, due to the structure limit, can't completely solve system caused by water side off temperature measurement error compensation.Deficiency, filled with water in boiler accidents such as working conditions, the system measurement error is too large may lead to serious consequences

More than 3, complicated structure, static sealing points, the construction scale and winter insulation problems.

4, measuring time-delay longer, not immediate reaction boiler water level change, poor quality of measurement signal conditioning.

5, due to the cooling barrel exothermic, the use of high cost.

These defects are due to differential pressure type measuring principle and the system sampling caused by unreasonable structure, cannot be improved.Under abnormal conditions for the safe operation of the boiler caused great hidden trouble.

To thoroughly solve the problems existing in the steam drum water level measurement, our company according to working condition of boiler steam drum water level measurement and control professional design produces ZW - BGL series intelligent special boiler drum level gauge.

Second, the working principle:

ZW - BGL series boiler drum level gauge is based on the capacitance measurement principle of liquid level meter, the tomography technology, through the analysis of the sensor scans and special liquid level meter in the dielectric constant and the temperature of the liquid phase and gas phase, the dynamic compensation.After comparison operation system software, the output is proportional to the boiler liquid level standard of 4 ~ 20 ma current signal and four groups of SPST solid state relay switch signal.Can also be output supply using RS485 digital signals.Liquid level meter in the running process real-time dynamic compensation, to reduce factors such as temperature, pressure change to small zui, long-term stability is good, is a full process, cost-effective liquid level gauge.

Applications:

ZW - BGL series boiler liquid level gauge with resistance to high temperature and high pressure, long service life, high reliability, high precision, high stability, can be widely used in all kinds of industrial steam drum, plus, low and high, conversion furnace such as liquid level measurement and control of pressure vessel.

Four, the main features:

1, two wire current loop, measurement system from the current loop;

Rev. 2, with a full working condition (boiler, stop, blowdown, accident conditions, etc.) under the liquid level accurate continuous measurement and control functions;

3, take tomography technology, to be able to medium dielectric constant changes in liquid phase and the vapour phase medium dielectric constant change and temperature change for precise compensation at the same time, under any circumstances without having to calibration;

4, high precision, high stability, resolution of 0.01 mm, years of drift is more than 0.5 mm;

5, through the CE certification of good electromagnetic compatibility features;

6, high temperature, high pressure resistance, long life;

7, there is no "false water level" measurement;

8, operating software for the Chinese operating environment, easy setting, with the diagnosis.

Five, the technical parameters:

Working voltage: z: 36 v.Small z: 9 v.

Current loop: two wire 4.00 mA ~ 20.00 mA (+ / - 0.2%);

Explosion-proof level: ExiaIICT6 ExiaIICT1 (to 40 ℃ ~ 70 ℃) to 5 (- 40 ℃ ~ 85 ℃);

Explosion-proof parameters: Ui = 30 v, 2 = 100 ma, Pi = 0.75 m3 WCi = 100, Li = 10 uh solid state relay (each group) Ui = 30 v, 2 = 100 ma, Pi = 0.75 WCi = 150 pf, Li = 10 uh;

Measuring range: 0 ~ 2200 mm;

Measurement cycle: 0.5 seconds;

Resolution: 0.01 mm;

Temperature drift: + / - 0.05 mmMax (- 40 ℃ ~ 85 ℃);

Job stress: 40 mpa;

Linear deviation: + (1 + 0.05% FS) mm;

Medium temperature: 450 ℃;

Ambient temperature: - 40 ℃ ~ 85 ℃ (ExiaIICT1 - T5);

Storage temperature: 55 ℃ ~ 100 ℃;

Protection grade: IP67.

Solid state relay:

Configuration: four groups SPST (NO) solid state relay;

Load voltage: 220 vac / 30 VDC / 300 VDC (not explosion-proof) AC (explosion-proof place);

Load current: 500 ma;

, alarm mode: "alarm" optional five independent optional alarm mode;

Delay: 1 ~ 60 seconds, can the independent programming.

Six, the standard wiring diagram:

Seven, warranty terms:

Users in strict accordance with specifications, under the guidance of correct wiring, installation, maintenance, this product free warranty 1 year.

The following situations to be outside the scope of warranty:

1, to remove the circuit board and various components.

2, lightning or high voltage into the system, circuit board burn out;

More than 3, power supply voltage limit, circuit board burn out

4, power supply box into the water, or other foreign material;

5, correct selection range of the use of the product;

6, sensors or a certain parts of the machine or damaged that touch an injury;

7, not according to specifications correct installation, debugging, and failure to correct maintenance result in product damage or super poor.

Eight, installation steps:

When the drum level gauge has been installed, the air valve, hydraulic valve, drain valve is closed.

Please according to the following steps:

1, slowly open the liquid valve, observe carefully measuring cylinder, weld, flange have "run, run, drip, leak" phenomenon.

2, level gauge preheating 2 0 minutes

3, slowly open the valve.

4, check the output 4-2 0 m whether A current signal in the normal range.

5, according to the need to open the drain valve, discharge measurement tube in cold water, sewage, to speed up the circulation and improve measure.

6, after waiting for the normal work of the level gauge, for measuring cylinder do heat preservation processing, this is helpful to improve the accuracy of measurement.

Nine, installation schematic diagram:

Ten, the matters needing attention:

1, the supply of products with product certificate and instruction manual, including product number parameters, wiring diagram, and manufacture date, please check it carefully so as not to use the wrong.

2, when installation should be according to the product connection check site interface is consistent with the product.

3, this product is a precision instrument, banned free disassembly, collision, fall and break.

4, if discovery is unusual, in use should turn off the power to stop using, for inspection or directly to our technical department.

5 should be restored the original packaging, transport, store in a cool, dry ventilated warehouse.

6, installation should pay attention to not put sensors in the process of using insulation broken.

7, install the scene to take effective lightning protection measures.

8, this series of any level gauge shell must be reliable grounding, resistance should be less than 4 Ω.

9, using 485 communication network, the level must be equipped with safety barrier and isolator.

10, according to the security gate flame-proof certification, installation should be according to the requirements of the specification.

11, when the transmitter is used to supply power to security gate "0" area of the power transformer must meet the requirements of article 8.1 GB3836.4-2000.

Eleven, selection of coding:

Twelve, design selection and ordering information:

1, model specifications: ZW - BGL series;

2, the name of the measured medium, medium density;

3, measurement range, can also be referred to as the nominal length;

4, work pressure, work under pressure;

5, working temperature: measuring the temperature of the liquid;

6, material requirements: liquid material;

7, whether matching supply flange, bolts, nuts, valves, fittings, such as sealing washer;

8, flange standard: nominal size of the flange, 3/4 ", DN25, (, DN80, DN100 or 6;

9, special requirements: before ordering, please indicate in detail.

After-sales service commitment:

Level 1, I companies sell products within twelve months appear quality problem, is responsible for free maintenance.

2, the warranty period, any quality problems such as the products of our company, my company is responsible for free repair or replacement.

3, the warranty period, such as user improper use, damaged products, my company is responsible for the maintenance, charge damage parts cost.

4, after the warranty period appear quality problem, my company is responsible for the maintenance, charge damage parts cost.

5, such as user need to my company site services, to users in the province I company service personnel to reach the site within 12 hours, fujian association of foreign languages and user reach the site within 48 hours.