To people a good living environment, the Sichuan Provincial Government to respond positively to the national environmental policy, released the latest notice "Sichuan Province to win the Battle of Blue Sky" and other embodiments of nine. Which highlighted: increase Condensing units and cogeneration units technological transformation efforts, speed up the heating pipe grid design. In areas do not have central heating conditions, the existing multiple small coal-fired boilers, to replace the principle of construction of large-capacity coal-fired boilers in accordance with the same amount. For shutting down key areas of environmental protection, energy consumption, safety and other 300,000 kilowatts coal-fired units of non-compliance.
Scientific and orderly promote clean energy development and utilization of hydropower, natural gas (shale gas), wind power, solar, biomass and so on. As of 2020, the province's hydropower installed capacity reached 79 million kilowatts, the proportion of non-fossil energy consumption reached 37.81%, increase the proportion of natural gas consumption to 16.19%.
The implementation of "Sichuan" Thirteen Five "energy development plan" requirements on coal consumption, increase the intensity of coal washing, coal simultaneous construction of new coal washing facilities, supporting the completion of existing coal mines coal washing facilities in accordance with points Area. Improve coal quality and use of industry standards, do not comply with the provisions of commercial coal quality management and environmental protection requirements of the indicators listed commercial coal. Prohibit the circulation and use of low-grade bulk coal, bulk coal investigated and dealt with according to the law without a license behavior. Increase the civil bulk coal clean governance efforts to promote electricity instead of coal, substitution of gas for coal, to promote the use of clean coal, advanced civilian stoves, strengthen civil bulk coal management. Strengthen regulation and control coal use in autumn and winter. For shutting down key areas of environmental protection, energy, security and other non-compliance of more than 300,000 kilowatts coal-fired units.
After a long period of use, the boiler will accumulate carbon. Boiler cleaning is aimed at the coking and carbon accumulation of the boiler in the process of operation. It is a good solution to the contradiction of boiler cleaning affecting production, and the conventional cleaning technology will produce a large amount of waste water. Let's take a look at it. 1. Decoking cleaning: adding diluted detergent to the boiler system and filling the boiler system with a high trough water level of 1 / 2. Amount of coke remover: 10% and 20% according to scale thickness to determine the specific dosage. Temperature: 90 ℃ 95 ℃, time: 12 h 72 hours, according to scale thickness can be determined. 2, rinse cleaning: boiler cleaning system after cleaning Rinse with clean water for 2 times until the coke cleaner is free of foam and the water is clear. Temperature: 85 ℃, 95 ℃, time: 5 hours. 3, blow the water step: after the boiler is cleaned, connect the air compressor at the pressure gauge or other connectable place, use compressed air to boost the system to 0.3 to 0.4 MPA, and empty at each low point, so repeated until the water is blown out.
The installation of pressure gauges for Fangkuai boilers depends first on the pressure point and the space position of the pressure gauge (or pressure transmitter), and then on what pipeline accessories there are and how to lay them. (1) in order to measure the static pressure correctly, The extraction port must be perpendicular to the medium flow. No chamfering, flanges, and burrs. When measuring the liquid pressure, the pressure-taking port shall be drawn from the lower part of the pipe section, so as to prevent the gas in the liquid from entering the pressure-guiding line; When measuring the gas pressure, the pressure-taking port should be drawn from the top of the pipe section to prevent dust in the gas and water droplets from entering the pressure-guiding pipeline. (2) the inner diameter of the pressure-taking pipe is usually φ 7 / 1. 3mm (for water, steam), its length should not be too long (< 60m). If the diameter and length of the pressure-taking pipe are too small, the dynamic transmission of pressure measurement will be affected and the dynamic error will be increased. The inner diameter is too large, not easy to maintain and install. The pressure-taking line shall not be laid horizontally in order to prevent the accumulation of bubbles (when measuring the liquid) and the water column (when measuring the gas). (3) the pressure-taking line must be fitted with a needle-shaped valve (to cut off the pressure in the event of failure of the pressure-taking line in operation), Secondary needle valves (instrumentation, stop, replacement), condensing coil and elbows (isolation elastomers from high-temperature heating in the medium and easy to install sealing patches); and Sewerage valves and sewerage lines, etc. For special pressure measurement, the pressure taking line must also be equipped with vent valves, isolation rooms, etc. (4) the installation site of the pressure gauge (pressure transmitter) shall meet the environmental conditions (temperature, humidity, vibration, etc.) used by the instrument, At the same time, it should be easy to observe, repair and ensure safety. The pressure-taking pipeline of high-temperature medium must be coated with a thermal insulation layer to avoid scald when punching the tube.
The horizontal steam boiler is compact in structure, small in size and economical in capital construction, easy to install, connected with valves, water, electricity and piping can be operated. Stable operation, convenient adjustment, unique anti-leakage air design, long time to seal fire.
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