three pass boiler thermal efficiency

Shanxi Province is located in China's western areas north of the Loess Plateau, the terrain finished solid, rich products. Thanks to energy supply and price advantage of coal, coke, metallurgy, electric power and other coal industry, the rapid rise of the formation of Shanxi coal-based economies of resource-based industries.

Shanxi Province, but had coal and Xing, but also because of the coal and sleepy. According to the report, "2017, Shanxi Province, coal accounted for the proportion of energy consumption up to 84.6%, higher than the national average of 24 percent, it is 2.9 times as much as the global average of Shanxi to 1.6% of the national land area, consuming about 10% of national coal amount. for Shanxi, winning the battle of blue sky, coal pollution can be effectively controlled is the key.

According to the "Blue Sky Battle Shanxi three-year action plan," issued in July this year (hereinafter referred to as "" Shanxi three-year action plan '') planning requirements, by 2020, sulfur dioxide, total nitrogen oxide emissions are lower than in 2015 more than 20%, compared to strive average concentration of sulfur dioxide in 2015 fell about 50%. Among them, 2020, total coal consumption in 8 cities in key areas to achieve negative growth, the province's coal consumption in primary energy consumption share dropped to 80%, the proportion of the province's coal consumption of coal accounts for more than 55%.

According to Shanxi Province Bureau of Statistics latest data, as of the end of August this year, Shanxi Province, the outgoing power 50.67 billion kwh, up 21.1%; the first half of Shanxi new energy consumptive power grid to complete 15.6 billion kilowatts, an increase of 58.2%, new energy abandoned consumption fell 90.6% year on year, abandoned electricity rate fell 10.2 percentage points.

The past two years the province shut down 52 coal mines, quit production capacity 45.9 million tons, subtract coal production capacity of 9.25 million tons per year, the completion of energy-saving 18 million kilowatts of coal-fired power plants, coal-fired power plants province's average coal consumption of electricity of 320 grams per kilowatt-hour of standard coal. In the first half of this year, the province's above-scale industrial Shanxi coal industrial added value increased only 0.8%.

The installation of pressure gauges for Fangkuai three pass boiler thermal efficiencys 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.

Steam three pass boiler thermal efficiencys and pressure hot water boiler equipment which has a different, more importantly, the goods difference: pressure hot water boiler output a certain measure of heat medium water; steam boiler output device is certainly a measure of water vapor. Second, there are some differences on the auxiliary: used like pressure hot water boiler circulating pumps, steam boilers do not have equipment; Steam boiler water level gauge equipment, do not have pressure hot water boiler; steam boiler plant using the steam separator package, atmospheric the hot water boiler with a water storage tank; Third, the production boilers, boiler installation, a boiler, a steam boiler equipment demanding little stability criteria. Fourth, the key is to use the difference, steam boiler apparatus outputs a high saturation pressure soft drinks, as a thermal aspect, polyester, etc. in medicine, due to the output of the steam, thus pressure vessel, a boiler and a boiler installed must comply with law boiler output pressure hot water heat medium is water, not pressurized container.

Common methods of water quality testing methods commonly used in industrial three pass boiler thermal efficiencys which industrial boiler water quality testing of water quality testing methods which are commonly used in industrial boilers which (1) comparative analysis. Industrial boiler water quality testing will generally take two comparative analysis. The first analysis method is to compare room. Indoor contrast mainly through the contrast between the contrast between people or equipment. The second method is to compare the laboratory analysis. This method is mainly for comparison and testing personnel random error, system error. (2) review sample. Water quality sampling, number, checking and retention, and then returned to retest samples deputy members. Deputy sample prior review, to be processed. Environment and pay attention to time during retest retest sample, so that the processing result can be obtained twice, and then the results were compared. Sample analysis (3) in parallel. When parallel samples for monitoring, to ensure that each batch of samples will be monitored. Determining the actual number of replicates the number of samples so that it can effectively ensure that the number of replicates measured more reasonable. Also setting it within a reasonable range. (4) control a calibration curve method. The calibration curve using the control method can make the results more accurate. First, the calibration curve Control Act mainly a combination of a certain time period, so that the result will be more timely and effective, precise terms, generally to a calibration curve based on monitoring of time each batch of samples. Second, to ensure the accuracy of the calibration curve, it can really play to monitor the effect of the sample.

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