Gas boiler precautions required during installation methods, or steps :( a) a foundation base of the boiler should be provided is determined according to the local soil, manufacturers design reference by the civil sector again. After reaching the base strength boiler, the boiler should drawings inspection and acceptance, and to draw the whole boiler three reference lines: a, longitudinal reference line - drum center or the center of the combustion apparatus. b, lateral reference line - the center of the front axle or chain grate slag centerline of the machine. C, elevation reference line - can be selected from a number of locations about four weeks, respectively, on the basis of the marking, the relative offset between the markers should not exceed 1mm. Furnace in place. After assembly the lower part of the boiler in place first, then the upper assembly large, the upper and lower portions need to find a combination of two positive pads firmly, should be both inside and outside the two casting. Installation location and size deviation test methods according to GB50273 "boiler installation engineering construction and acceptance" implementation. (B) lifting the boiler, during lifting, should be suspended on a lifting lug drum boiler ready large, the boiler on a foundation base coincides with the pre-drawn reference line. The longitudinal centerline of the boiler and the foundation, the deviation is not more than 3 mm, and the inclination with the center line of the drum hammer correction, allowing the central drum inclination is not larger than 5 mm, otherwise use horns foundation base and the junction pad level. Maximum level (c) Installation of boiler network (1), water supply conduit installation requirements typically require as backup pool below the normal water level line of the boiler, so as not to shutdown, boiler feedwater flowing into a large number of drainage caused to start the next . At the outlet of the tank (i.e., an inlet feed line) should be installed wire screen. (2), a main steam line installation requires the main steam lead pipe straight run section should be more than 0.5 m, the bending radius should be 4-5 times the diameter of the pipe, the trap should be fitted at the lowest line in order to prevent water hammer pipe, while to be reliable insulation. (3), the safety valve should be installed in the valve installation requirements after the hydrostatic test, the safety valve shall be fitted exhaust pipe, the exhaust pipe of the safety guide outside the boiler house, allowed valving the exhaust pipe. (4), mounting a lower water table level table downcomer must access a safe place, Hancock rotating flexible water table, not leaking, water table must be installed to the lighting device, easy to observe. (5), a pressure gauge mounting means so that when the scale gauge vertical plates, should be painted red gauge scale to show the maximum allowable pressure boiler, rotating flexible plug gauge, not leaking, water flow, pressure gauges insulation prohibited. (Iv) the boiler chimney installation requirements, when lifting the chimney, the chimney should be straight, horizontal direction lead length should not be too long, generally less than 5 meters, the height of the chimney should comply with relevant national standards. To add chimney rain cap, the weight of the chimney should not fall directly on the boiler chimney take over the host. Installation (e) combustion system: 1, according to the combustion system of FIG power line control circuit, a control signal line and the control line is electrically connected, the program should be installed reliable ignition and flame failure protection devices. Combustion process controller provides a separate set of contact start-stop control. May be formulated in a variety of burner start-stop loop cascade control relay 10A is a fuse, relay start-stop control stops the control terminal may be connected to the burner, may directly control the power of the burner. Both constant pressure sensor, water power, fuel, gas pressure set value is detected after the automatic controller opens. Time pressure sensor, water supply, oil, gas, and their detection circuit, alarm and found the problem immediately shutdown flame protection, the controller automatically displays the point of failure, an alarm sounds machine.
Multi-fuel steam boiler protection water protection Fuel steam boiler: boiler water level gauge plate supporting one to two, should always be compared with each other, findings indicate inconsistency shall be corrected immediately. Class water level should be flushed, to determine their true level. While the water level comes electrode rod can accurately capture level signal to an alarm or a pump control. A steam pressure protection, the pressure controller: selection of high sensitivity of the pressure controller, the pressure is high, or low levels of signal to the electrical switches, automatic control chain protection or other control lines. Using pressure controllers and electrical contacts, the vapor pressure can overpressure alarm; single adjustable pressure controller or dual fire burning fire the actual operating pressure. 2, the safety valve: safety valve is the last line of defense to protect the boiler, the boiler pressure exceeds the limit, according to the set pressure relief valve design with the school, the exhaust steam pressure relief, to ensure the normal operation of the boiler. Flame protection: imported burner having a flame protection device, combustion function is to detect, when the ignition failure or extinguish combustion middle, immediately off the burner into the oil (gas) solenoid valve, the blower continues to operate at this time, the furnace was purged of residual internal combustible gas, after 20 to 30 seconds purge, and various auxiliary blowers automatically cut off power, the boiler operation stops. Self-locking power failure protection: Under the emergency power supply is interrupted, the boiler shutdown immediately self-locking, if the current power is restored, the boiler will not start at any time, you must reset release self-locking, to re-start the ignition.
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How to make boilers more energy-efficient? (Common measures) 1. boiler design of energy-saving measures (1) boiler design, first of all should be a reasonable selection of equipment. In order to ensure safety and energy conservation in the industrial boilers meet user requirements, should be due to self-select the appropriate boiler design boiler type in accordance with scientific and rational selection principles. (2) when the boiler selection, but also the right choice should be based on the type of boiler fuel boiler, industry, geographical install a reasonable choice of fuel type. Reasonable blending the coal moisture, ash, volatile matter, particle size and other combustion equipment meet the requirements of the importing boiler. At the same time, we encourage the use of new energy sources such as straw briquettes as an alternative fuel or blended fuels. (3) In selecting fans and pumps, to select a new type of energy-efficient products, can not choose backward out of the product; boiler operating conditions by matching pumps, fans and motors, to avoid the phenomenon of the "big horse car", the current inefficient use, a large auxiliary energy consumption, should be modified or replaced with energy-efficient products. (4) a reasonable choice of parameters boilers generally at efficiency of 80% to 90% of the maximum rated load, as the load decreased, the efficiency also decreased. Capacity boilers generally used with greater than 10% of the actual vapor on the line, such as when the selected parameters are not exactly according to the standard series, the boiler can choose a higher gear parameters. Auxiliary boiler selection also refer to the above principles, to avoid the "big horse cart." (5) reasonably determine the number of boiler principle is to be considered normal boiler maintenance shutdown, and pay attention to the number of boiler boiler room, no more than 3 to 4 units. (6) a boiler economizer SCIENCES designed to reduce heat losses and improve the thermal efficiency of the boiler, economizer heating surface disposed in the boiler backpass, boiler feed water is heated by heat of the flue gas, to save energy, the installation Xingmei after, a feedwater temperature increase the temperature difference between the boiler water and feed water is reduced, reducing the thermal efficiency of the boiler feed water is generated. Countries: where <4 t / boiler flue gas temperature is not greater than 250 ℃; ≥4 tons / boiler flue gas temperature is not greater than 200 ℃; ≥10 tons / boiler exhaust gas temperature is not greater than 160 ℃, province or should be installed coal is.
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