Natural gas boilers use natural gas as fuel to heat the heat medium water through the burners, and then exchange heat to provide heating and hot water for living and bathing. Now it has a relatively complete production line, high boiler intelligent degree, fast heating speed, low noise, no dust and other pollutants. It is an economical and environmentally friendly hot-selling boiler product that is very suitable for China's national conditions.

The electric boiler is a boiler device that uses electric energy as an energy source to convert hot water and heat the hot water through electric heat conversion, and has the characteristics of no waste discharge pollution, high degree of automation operation, and no noise.

We calculate the operating costs of both according to the heat required to heat 1 ton of water from 15 ° C to 50 ° C.
       A total of heat Q = 1000 kg × (50-15) × 1 kcal / kg ° C = 35000 kcal is required.

First, the operating cost of electric boiler
       1 degree electric heat is 860kcal / kWh × thermal efficiency 90% = 774kcal / kWh;
       The power consumption of 1 ton of hot water is 35000kcal ÷ 774kcal / kWh = 45.22 degrees;
       The electricity price is 0.6 yuan / kWh, then the cost of heating 1 ton of hot water: 45.22 × 0.6 = 27.13 yuan;
       Therefore, the operating cost of electric boiler heating 1 ton of hot water is 27.13 yuan.

Second, natural gas boiler operating costs
       1m3 natural gas heat is 8500kcal/m3×thermal efficiency 100%=8500kcal/m3;
       The gas consumption of 1 ton of hot water is 35000kcal ÷ 8500kcal / m3 = 4.12m3;
       The price of industrial natural gas is 2.9 yuan / m3, then the cost per ton of hot water: 4.12 × 2.9 = 11.95 yuan Therefore, the operating cost of heating 1 ton of hot water in a natural gas boiler is 11.95 yuan.

This formula calculates the gas consumption data of the natural gas boiler with a thermal efficiency of 100%. In practical applications, the gas consumption is higher. When calculating the gas consumption of natural gas boilers, the natural gas calorific value and boiler efficiency should be fully considered. The value that comes out can be in line with the actual situation.

If you want to know more about boiler price information, please call the National Express Hotline, we will be happy to help you!

Air consumption is an important indicator for evaluating the quality of gas-fired boilers. It is also one of the standards that users measure when purchasing boilers. This data will directly determine the cost of the company's investment in boiler operation.

We use a 1 ton gas-fired steam boiler as the base to calculate the method for calculating the gas consumption of the boiler.

First, factors affecting the gas consumption of the boiler
       1. Boiler heating area
       Generally speaking, the larger the heating area is occupied in the whole boiler, the more heat is transferred to the boiler by the fuel combustion, and the fuel utilization rate is improved. On the one hand, the company saves more fuel.
       2. Fuel calorific value and price
       The calorific value of different types of fuels will also vary. The calorific value of natural gas combustion is 8600 kcal/m3, and the calorific value of diesel is 10240 kcal/kg. However, the cost of fuel should also be considered. comprehensive.
       3. Boiler thermal efficiency
       The thermal efficiency of the boiler is also closely related to the heating area. The larger the heating area, the better the heat transfer effect, which will increase the boiler thermal efficiency linearly, make the fuel utilization more complete, and the gas consumption cost less.
       The condensing gas steam boiler produced by Fangfang uses a advanced condensation technology to set up a condensing recovery device near the flue. When the high-temperature flue gas passes through the device, the latent heat part encounters the condensed water to release heat, which is supplied to the boiler for absorption again. The thermal efficiency can be It is as high as 108%. In one year, it can save the company the fuel input cost of 50,000 to tens of thousands (depending on boiler capacity and maintenance quality).
       4, boiler output
       The output of a 1 ton boiler is 700,000 kcal, and so on. The output of a 10 ton boiler is 7 million kcal.

Second, the fuel consumption calculation formula
       Fuel consumption = boiler output ÷ fuel calorific value ÷ boiler thermal efficiency.

According to the above method, the user can calculate the gas consumption of the gas steam boiler according to the various values ​​provided by the boiler manufacturer, and more comprehensively understand the boiler and select the boiler equipment suitable for the enterprise.

1. When the gas steam boiler rises from cold ignition to working pressure, the temperature rise and pressure time is generally controlled at 3 to 4 hours. When the boiler pressure rises to 0.05~0.1MPa, the boiler pressure gauge and water level gauge should be flushed; when the boiler pressure rises to 0.15~0.2MPa, the air valve on the boiler should be closed and the safety valve should be checked for leakage. If there is leakage, measures should be taken. When the boiler pressure rises to 0.2~0.25MPa, the boiler shall be subjected to a sewage test. When the sewage is discharged, the boiler water level should be higher than the normal water level, and check whether the sewage valve leaks. If there is leakage, measures should be taken to eliminate it; When the pressure rises to 0.3 MPa, it is necessary to thoroughly inspect the fastening parts of the pressure components of the boiler, such as the manhole, the hand hole, the inspection hole and the bolts connected to the flanges, and perform a hot tightening.

2. The pump can check whether it can maintain the normal water level under the automatic running state. The water level can be started normally below the “starting pump line”, and the water level can stop working in the “stop pump line”.

3. Is the pressure control normal? When the steam pressure reaches the set value, the combustion stops and the overpressure lamp lights up. When the pressure drops to the set value, the boiler can start automatically.

4. When the pressure reaches the load set value, the load is transferred from a large fire to a small fire. When the pressure drops to the set value, it is turned from a small fire to a large fire.

5. When the pressure cannot be stopped under the normal set pressure condition, the second overpressure will alarm and stop the furnace, and must be restarted.

6. The exhaust gas temperature can not exceed 300 ° C, otherwise it should be shut down for inspection.

7. When the gas-fired steam boiler enters the normal operation stage, the boiler boiler personnel should strengthen the monitoring of the boiler body, safety accessories and instruments and auxiliary equipment, and earnestly carry out the patrol inspection of the boiler and auxiliary equipment and fill in the operation record in time.

1. When the ultra-low water level is shut down, it is necessary to carry out the furnace test (press the button on the B3 board, it should be able to simulate the lack of water to stop the furnace), or discharge the sewage to check the function of the ultra-low water level shutdown.

2. The safety valve is manually opened once and the reset is rapid.

3. The burner control system and the electric eye should be inspected, and the photocell of the electric eye should be taken out by hand. The furnace should be stopped within 1 s; and the electric eye should be wiped.

4. The valve packing is filled or replaced; eliminate running leaks.

5. The bolts are tightened everywhere, especially the gas pipeline system, if necessary, leak detection.

1. Check the function of the water level regulator: Whether it can automatically water up and stop the pump.

2. Inspection of flame monitoring.

3. Rotate, slide, and lubricate the cam parts and wipe them.

4. Flush the water level gauge 1-2 times (per shift), and operate according to the correct method until the water level gauge is cleaned.

5. Sewage 1-2 times (per shift).

The gas boiler starts and stops abnormally, not only causing damage to the boiler itself, but also greatly increasing the fuel input and increasing the input cost. So, what are the reasons for the frequent start and stop of the boiler?

The on-site boiler operating load is low, the gas consumption is large and the gas is unstable, the pressure controller has small backlash or poor contact contact may cause the boiler to start and stop frequently. If you encounter relevant circumstances, you must deal with it in time:
       1. The operating load of the on-site boiler is not less than 30%, and the gas consumption is continuously stable; 2. Adjust the pressure return difference;
       3. Replace the pressure controller.

Note: If it is considered that the burner is not started and stopped frequently because the load is too small, the burner with proportional adjustment can adjust the start and stop of the burner by trimming the PID parameters and the set deviation.

Reasons: (1) Insufficient air pressure lock; (2) Insufficient solenoid valve, air leakage at the joint, check and lock; (3) Open circuit of thermal relay; (4) At least one of the conditional loops is not established (water level, pressure, temperature and program controller) Whether to power on).

Remedy: (1) adjust the air pressure to the specified value; (2) clean or repair the solenoid valve pipe joint; (3) check the component for damage and motor current according to the reset; (4) check whether the water level, pressure and temperature are out of limits.

The cause of the failure: (1) the ignition transformer burned out; (2) the high voltage line is damaged or dropped; (3) the gap is too large or too small, the relative position of the ignition rod; (4) the electrode is broken or shorted to the ground; (5) the spacing is not Suitable.

Remedy: (1) renewal; (2) re-installation or renewal; (3) re-adjustment; (4) re-installation or renewal; (5) re-adjustment.