Double room balance container

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Double room balance container with water level indicator or differential pressure transmitter, can b…

Products overview:

ZW - EP seriesDouble room balance containerDivided into: normal;Compensation type two kinds.By pipe, elbow, water cup, funnel, etc, because of the saturated steam for pipe and heat pipe bending at the same time, the positive pressure compensation tube water severely, in any case are approximately equal to the corresponding drum pressure saturated water severely.At the same time as the right to choose the height of the pipe pressure compensation, no matter how the pressure in the steam drum is positive pressure compensation pipe pressure and negative pressure of pressure change values are equal.Therefore, differential pressure produced by the same balance container.The water level constant and low water level gauge instructions.Because the balance container leads to equal a exception, negative pressure pipe water temperature.Although affected by drum press and room temperature change, but their variation are equal, so the differential pressure has no influence on balance container.

Second, the structure and working principle:

ZW - EP series double chamber balance container, under normal conditions within the boiler steam drum water level cannot be directly measured, so much the out pipe measurement method is adopted.But the disease is out pipe and drum temperature difference is big, so the difference in the density of water and steam drum, resulting in certain error of measurement.With double room balance container because it was in the process of work, saturated steam condensation heat in the room, for positive pressure compensation heat pipe and pressure compensation, and balance the outer container was enough protective layer.Reduce the heat loss, make balance of temperature in the temperature close to the drum container.Which is the density of water pressure compensation pipe and suction tube under any conditions are approximately equal to the density of the steam drum in the inland waters;Again because the correct choice is the height of the pipe pressure compensation, in steam drum water level, make the pressure inside the drum change anyhow, positive pressure compensation pipe pressure and negative pressure of pressure change values are equal, so double chamber balance container output differential pressure is constant, the lower the water level is constant water gauge instructions.Once inside the drum water level change and balance the output of differential pressure container with linear change, so the low water level indicator will in time in the steam drum water level.

Applications:

ZW - EP series double chamber balance container with water level indicator or differential pressure transmitter, can be in normal operation of boiler and, in the process of the furnace and circumstances, to monitor the drum water level, and external changes the output level of differential pressure (AP) signal.

Fourth, ensure the safety of boiler operation characteristics:

Advantages:

1 measurement deviation is small

2 signal stability, followed in a timely manner, timely feedback real within the drum water level

3 long service life.

Disadvantages:

1 are greatly influenced by the environment, than the water temperature is not uniform, not real-time quantitative calibration.

2 in winter and summer, light during the day, had a greater influence on the environment such as wind.

Only guarantee 3 reference water column temperature constant, can achieve balance container measure effect.

Five, the product model and use scope:

Six, debugging steps:

1. The system doesn't work (boiler drum level is zero) : on the premise of ensure the pressure chamber full of condensed water, close the balance valve and open the valve, plus or minus phase balance container valve of liquid at the same time open the double room. The output should be to 20 ma, and full scale. The output will be dispatched to 4 ma, and the negative transfer of zero to 100% range.

2. The system is working (steam boiler liquid level) : on the premise of ensure the pressure chamber full of condensed water, close the balance valve and open the valve, plus or minus phase balance container valve of liquid at the same time close double room.

3. Measurement system normal work, three sets of valve status: balancing valve closed;The positive and negative phase valve opens. Double room open valve of liquid balance container.

Seven, notable matters of installation:

1, the boiler steam drum center distance of steam pipe should be the same as the balance container;

2, balance the pressure vessel and boiler drum level should be the same;

3, balance container connected to the boiler steam drum flange dimensions or welding interface specification should;

4, pay attention to: the balance container before installation must be conducted for boiler pipe blowing, prevent impurities from entering the balance container, and a serious accident.

5, will balance the container of soda interface respectively with outer drum isolation valve welding, ensure the vertical installation.Due to the double room balance container heavier, so need at the bottom of the channel steel support, and the bearing surface should be smooth.In order to prevent the equipment due to thermal expansion displacement and damage.

6, double chamber balance container drain pipe should be separate to steam drum water cycle zui fast drop tube (near hydrophobic ShuiGuanChu add globe valves), the vertical length should be greater than 10 m, to ensure that the balance container without water without time.Take time to occur such as turning down the globe valve opening.The line do not heat preservation.

7, double chamber balance container is negative pressure in pressure piping should be in a horizontal direction after lead to 1 m laying down, to ensure the water temperature is equal to the ambient temperature of selecting pressure tube.

8, once installed, the soda sampling sampling pipe, valve, pipe, cylinder should be tested for insulation treatment, cylinder at the top do not do heat preservation.

9, led to the differential pressure transmitter of two should be parallel to the pipeline laying, common heat preservation, need to add heating antifreeze and according to the scene.Add steam with heat pipe should be pressure tube and isolation.In case of guide water vaporization pressure tube affect measuring result.

Eight, when placing order, please provide the following parameters:

1, model specifications;ZW - EP;

2, the name of the measured medium, medium density: if you don't know the density, can tell us the name of the medium.

3, instrument measuring range: can also be referred to as the nominal length, namely the center distance of two flanges;

4, work pressure, work under pressure;

5, working temperature: high and low temperature measuring liquid;

6, material requirements: the liquid material.

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.