horizontal coal fired chain grate hot water boiler

horizontal coal fired chain grate hot water boiler

35 tph SZS gas-fired water tube boiler project for dairy industryPlenty of steam is needed in the milk powder production process of sterilizing, concentrating and drying; therefore, a stable steam boiler has a direct impact on the milk production quality. Heilongjiang Feihe Dairy Industry Co., LTD., established in 1962, has won the Gold Award of Monde Selection. As hazy weather appears frequently in recent years, air quality issues have aroused great concern of the whole society. The Chinese government has successively launched "coal to gas" and other environmental policies to improve the air environment. Feihe Dairy is taking an active part in environmental protection, the company decided to replace the present 2 sets of 35 tph coal-fired steam boilers and one set of 20 tph coal-fired boiler with 3 sets of 35 tph gas-fired steam boilers. Considering that the steam boiler is a core equipment of the production line, the company had attached great importance to this purchase and held an open tender. ZOZEN successfully won the bid with excellent product quality and service, and provided the company with 3 sets of SZS series gas-fired steam boilers. This series of boiler adopts the design of membrane water wall; the gastight test must be done before installing thermal insulation layers, to ensure there is no flue gas leak under the condition of micro-positive pressure combustion and help reduce the heat loss of the boiler body. In addition, to effectively reduce the NOx emission, the boilers are equipped with large volume furnaces and advanced low NOx burners imported from Europe.

Response to national environmental policy in recent years, Changzhi City, various enterprises and institutions from themselves, have the boiler environmental transformation and selection. However, due to various boiler plant manufacturers of products of varying quality, there is a variety of security risks in the operation; taking into account the level of professional fireman some units of non-compliance, the boiler operating procedures less skilled, the above reasons, Changzhi City Special inspection at this year's "safety month" held gas boiler safety planning activities of technical training courses, the city's use of gas-fired boiler units represent 233 enterprises and safety training. Fast boiler has a strong position in the field of clean-type gas boilers, and has a wealth of experience. Changzhi City, the special prosecutor of the special fast Boiler training for each unit represents.

Fangkuai boiler operation advantages 1, large font display water temperature, easy to grasp the boiler and system operation conditions, water temperature from 10 ℃ to 90 ℃ can be set at will, the boiler automatically to the system heating or to provide the user with hot water for bath. 2, the control system controls the start and stop of the circulating pump according to the furnace water temperature, when the furnace water reaches the set upper water temperature, the hot water circulating pump starts, and the hot water circulating pump stops when the water temperature is lower than the set lower temperature. 3. The horizontal gas-fired bath boiler is a three-way full wet back structure. It adopts the design of large furnace and coarse smoke pipe to increase the radiative heat absorption of the furnace and effectively save energy and reduce consumption. Use of threaded smoke pipes and Waveform furnace tank, greatly enhanced the heat transfer effect, greatly saved fuel consumption. 4, the whole machine is also equipped with overheat protection (when the furnace water temperature is super high, the burner automatically stops working and beeps to alarm, and the secondary overheat protection (when the boiler shell temperature exceeds 105 ℃, the secondary circuit is automatically cut off), When the boiler water is lower than the very low water level, the boiler stops working and gives a buzzing alarm), and the boiler leakage protection (the control system detects the electrical leakage, and when the short circuit is short, it will automatically cut off the power supply). 5, the boiler is designed according to the normal pressure structure, the boiler is in a pressure-free state, there is no danger of safety. Use of advanced centrifugal glass cotton multilayer protection Temperature, famous white color steel plate for outer packaging, less heat loss, beautiful anti-rust.

01. The gas-fired boiler should pay attention to the following points during operation: (1) the gas-fired boiler does not allow positive pressure combustion or smoke injection in the furnace, because it is easy to burn out the coal hole cover. (2) the bottom floor of the gas-fired boiler shall not be watered up to prevent damp corrosion. 2, gas-fired boiler operation every 2 weeks, should be checked. 3, gas-fired boiler operation every 3 months after 6 months, the furnace should be shut down for comprehensive inspection and maintenance. (1) check the gas boiler inside and outside, such as the welds of the compressed part, the corrosion phenomenon inside and outside the steel plate, if found serious defects should be repaired in time, if the defects are not serious, it will be repaired the next time the furnace is shut down. If any suspicions are found but do not affect production safety, records should be made for future reference. (2) after inspection, the boiler primer may be coated on the surface of the water to prevent corrosion. 4, gas-fired boiler and boiler base paint at least once a year. 5, gas-fired boiler maintenance method: dry method and wet method, shut down for more than one month, should adopt dry maintenance method, shut down for less than one month can be used wet maintenance method. (1) dry maintenance method: after the boiler stops the furnace, put away the boiler water, thoroughly remove the internal dirt, rinse it out, dry it in the furnace with a slight fire (pay attention not to fire), and then it will be 10 mm in diameter and 30 mm in diameter. The small lump of quicklime is divided into plates, placed in the pan, without contact with the metal, and the weight of quicklime is calculated at the volume of 8 kg per cubic metre of the drum, and then all manholes, hand-holes, pipe valves are closed, Check every three months, if the quicklime is broken, replace it, and remove quicklime and tray when the boiler is re-in operation. (2) Wet maintenance method: after the boiler stops the furnace, it gives out the furnace water, thoroughly removes the internal dirt, rinses it, reinjects the treated water to the full, heats the furnace water to 100 ℃, lets the gas from the water drain out of the furnace, and then closes all the valves, Protection is not allowed in cold climates Wet curing method, lest the furnace water ice damage the boiler.

How to provide boiler thermal efficiency thermal efficiency of the steam boiler has the following methods: low-pressure boiler at the factory has been designed considering the problem of thermal efficiency of the boiler, the flue gas from the device or change little aspects of energy-saving possibilities, it is best to start from the energy-saving operation (here talk recovered water vapor condensation method). The current design thermal efficiency of domestic low-pressure boiler is generally 70 to 90%, generally the actual operation of the thermal efficiency of about 60 to 80%, some even below 50%, a small low pressure industry as long as the operation, maintenance properly, can meet the design thermal efficiency of manufacturers. I think the management and operation should pay attention to the following points: First, the boiler flue gas temperature monitoring. Typically the maximum exhaust heat loss is loss, it is important to good control of exhaust gas temperature, exhaust gas temperature is generally low pressure coal-fired boiler of 150 ~ 180 ℃, fuel boiler exhaust gas temperature is 210 ~ 240 ℃, so when the boiler to find out why when the exhaust temperature is too high and promptly eliminated. Coal-fired boiler flue gas temperature is too high reasons are: high furnace pressure; shorting smoke; thick soot on the heat pipe; thick scale pot like. High temperature fuel exhaust reasons are: 1 air not adjusted oil, the oil is not completely burned in the chimney the secondary combustion occurs aft; 2 soot too, the need for timely cleaning; 3 shorting smoke; 4.... thick scale; Second, controlling blowdown rate. Without restricting the general rate of industrial sewage control in 5 to 10%, in the pot of water to ensure that qualified (mainly total alkalinity and pH value), the blowdown rate as low as possible, the sewage to adhere to the "ground row, row less, are ranked "the rules. Third, the maintenance of good furnace wall insulation. The heat loss is also a relatively large heat losses, now the manufacturers in the manufacturing and design has been well thought out, so we do not need to change, we just trying to be difficult to maintain. Outer surface temperature generally does not exceed 50 ℃, it will have to find out the reasons such as too high, and remove. Boiler insulation should always be kept dry, for coal, not a long positive run, or easy to damage the coal furnace wall and gate and so on. Fourth, adjust the ratio of fuel and air volume, complete combustion of the fuel as possible. Generally do not have a small amount of wind testing instruments, we can only go by experience adjustment. For oil, the normal combustion flame was yellow-white, non-glare, flame stability, no visible smoke chimney; For coal, the normal combustion flame pale, no visible smoke chimney, basic cinder burn coal particles as even as possible. Fifth, the need for a sound water treatment. Improve water treatment and water quality testing can maximize prevent fouling and correct guidance of the sewage, but it did not do a lot of small, companies usually do not pay attention.

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