28 mw food industry steam boilers

28 mw food industry steam boilers

This year, Harbin, Heilongjiang Province, the financial sector to actively promote the elimination of coal-fired boilers, and adjust the phase out coal-fired boilers financial subsidies, currently co-financing of 291 million yuan to support the city's coal-fired boilers out of work.

Combined with the characteristics of this year's work out coal-fired boilers Harbin, Harbin Finance Bureau jointly relevant departments to improve the policy adjustment, will expand the scope of the grant to build outside the area 10-20 tons of steam coal-fired boilers built-up areas and 10 tons of steam and less fuel coal boiler. Meanwhile, according to the actual situation of Harbin clean energy alternative work policies to increase financial assistance "from coal to biomass" approach; and to develop a more favorable subsidy policy of clean energy transformation of the urban fringe, the energy-saving house into the scope of the grant.

It is reported that, according to the above subsidy policy, the current urban levels, the financial capital of 291 million yuan has been implemented, which has been ahead of municipal finance district grant funds allocated 159 million yuan, 132 million yuan of the burden of the district also implemented through subsidies for local government bonds ways , effectively protecting the city out of coal-fired boilers work smoothly, since the Harbin into the winter heating period, ranked in the top 20 of 169 major cities in air quality rankings.

First, when the need for boiler pressure test? 1, the newly installed boiler when put into operation. 2, more than a year boiler outage and resume operation. 3, boiler, pressure member after significant repair or replacement, such as the number of water wall tubes in the replacement number of more than 50%, superheater, reheater, economizer other group member replacement, a significant repairs performed drum Time. 4, severe boiler overpressure 1.25 times the working pressure up to and above. 5, when a large heating surface area of ​​the boiler water after severe deformation. 6, according to operation, safety and reliability of equipment operation when there is doubt. Second, the method of pressure testing a boiler water pressure test should be carried out when the ambient temperature is higher than 5 ℃, antifreeze measures must be less than 5 ℃. 2, the water pressure test should be maintained above the ambient dew point temperature, to prevent surface condensation boilers, water seepage and the like will not occur closely confusion, difficulty increases inspection; but it should not cause high temperature to prevent vaporization (so difficult to find the leak) and excessive temperature stress, usually 20 ℃ ~ 70 ℃. 3, the water is full, pressure is gradually increased to 0.4MPa, namely a tight check, if necessary, be tightened once the flange, and hand Manhole cover bolt hole. 4, water pressure test, pressure should slow down, when the pressure rises to the pressure of work, should be suspended boost, check for leaks or anomalies, and then boosted to the test pressure for 20 minutes, if the pressure It did not decline, that is, down to the working pressure checked. 5, find any leaks should cook the recording, in order to reduce the time to repair the atmospheric pressure.

(2) when the boiler maintenance, should be highly alert boiler drum corrosion, corrosion, deformation, and other corrosive slotted embrittlement. Check the work to be thorough and meticulous. Must ensure that the quality of repairs in order to prevent crack propagation due to lack of strength or sudden tear.

Henan run gas boiler Q & A (III) 1. Henan boiler water wall type of gas main, which has several? A: (1) a tubular water-cooled wall light; (2) membrane wall; (3) water-cooled wall inner walls of the helical groove; (4) a pin-type water-cooled wall (also called stab waterwall tubes). Such water wall surface of the light pipe is required over a certain length of the welding bar, and to facilitate the laying of refractory material is fixed. Mainly used a slagging combustor zone, and certain solid slagging cyclone furnace 2 furnace. Henan role bullnose gas boiler are those? A: (1) increasing the length of the horizontal flue. Because the bullnose is extending into the furnace equivalent to an increase of the horizontal flue bullnose length. Thus, it is possible without increasing the depth of the boiler, the arrangement of the superheater heating surface more. (2) improve the heat transfer effect of the platen superheater. The flue gas from the vertical to the platen superheater in the absence of the bullnose, lateral erosion, erosion to the landscape, increased convective heat transfer effect. (3) increase the flue gas in the furnace so that the fullness of the flue gas distribution in the height direction of the combustion chamber tends to be uniform. Increasing the furnace so that an upper water-cooled wall and roof before the superheater heat absorption. 3. How to structure the bottom of the steam heating apparatus, Henan gas boiler? A: The device is placed along the length of the lower header tank steel in the second line, opened on the pipe holes 5mm diameter (number of holes corresponding to the number of the water wall) and connected to the steam pipe introducing foreign when administered with, intake air is controlled by a valve. 4. ? Principle Henan natural gas-fired boiler circulation is like A: Steel furnace in the cold state, full of inner drum water level elevation below the water evaporation system is stationary. When the tube is heated in the boiler rises, part of the water vapor is generated, forming a mixture of a less dense soda. While the heated downcomer outside the furnace. Water denser tube. In this way both the density difference effect arises impetus, soda mixture flows upward in the water wall, after the header, the catheter into the drum, the downcomer from the drum to the flow of water downwardly through the second line added to the water wall tank, so that the continuous circular flow. The formation of a natural cycle. 5. What is the circulation rate in Henan gas boiler? A: The amount of water entering the recycle loop and the riser G ratio D of the amount of steam at the outlet of the riser pipe is called the cycle rate. 6. The main fault Henan natural gas-fired boiler circulation are those? A: The main fault of the natural circulation circulation stagnation, back, soft drinks stratification, down pipe with gas and boiling heat transfer deterioration. 7. Henan gas boiler water circulation back at what happens? What's the harm? A: The water cycle back phenomenon occurred in the riser direct introduction of steam drum water space, as well as its weight when heated weak pressure differential is greater than the common circuit and the tube. When the vapor bubbles back up the tube with water down flow velocity close, the bubble will not be taken away, stagnant or slow moving state of bubbles increases gradually gathered, vapor-lock is formed, this temperature rise or wall alternating wall temperature, or over-temperature resulting in fatigue failure.

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