flat solar collector for solar water heater boiler

In flat solar collector for solar water heater boiler feed water or boiler water, why should we increase phosphate? What should pay attention to? In order to prevent calcium scale and corrosion in boilers alkaline, addition of phosphate in boiler feed water, boiler feed water into the furnace with the making of Ca2 + will not the formation of scale, but generated slag, and to be excluded by the boiler blowdown. This approach to the boiler feed water dosing phosphate phosphate treatment called boiler feed water. In boiler water phosphate solution was added, good control of a certain amount of phosphate (PO43-), produced under basic conditions as follows: dibasic calcium phosphate generated is referred to, the slag is a soft, easily with boiler blowdown away. Therefore, as long as control of boiler water volume PO43-, you can make the Ca2 + content in boiler water is very small. In actual production, is usually formulated with trisodium phosphate () or sodium phosphate () to 5% to 8% of the liquid, through the filtered residue, and then a 3% solution of water supply dubbed, boiler water it added directly or added boiler feed water, boiler and how much to increase the amount of water Ca2 + amounts, generally have to be determined by the debugger. Phosphate treatment boiler water is not volatile substances to add salt to the water boiler, the boiler will increase the salinity of the water, in order to ensure that the effect of boiler water treatment, without affecting the quality of steam and hot water, must pay attention to the following questions: (1) to the boiler feed water residual hardness smaller, should be more removed during feedwater softening Ca2 +, Mg2 +, in order to avoid too much slag generated in the water in the boiler, increasing the blowdown boiler even affect the steam quality. (2) the internal boiler water should maintain a predetermined excess amount of phosphate root. Further, dosing should be uniform, the speed is not too fast, so the water in the boiler sudden increase in salinity, affect the quality of the steam. (3) should be generated to drain away the water residue, so the boiler water gathering a lot of slag, affect the quality of steam. (4) for the boiler fouling, phosphate dosing during treatment, the scale must be removed first. Because the roots can act with phosphate limescale originally generated, so that the scale becoming detached slag, so that a large amount of water in the boiler water to generate steam to affect the quality of the slag, scale shedding severe clogging of the tubes will be even, resulting in circulation malfunction. (5) adding the drugs should be relatively pure, so as not to cause contamination of the pot and steam boiler corrosion and deterioration of quality. Pharmaceutical quality is generally should meet the following criteria: content of not less than 92%, the insoluble residue is not more than 0.5%. When dosing, the drug should be combined with the sewage, so as to avoid adding new agents are leaving the boiler. Regular or continuous dosing accordance with the provisions regular and continuous blowdown. Regular testing boiler water, to determine the dosage according to test results.

In early 2019, Hebei Province Department of Finance summarized the draft 2018 budget and financial performance in 2019 budget, which states that: 2019 in terms of air pollution control to invest 8.23 ​​billion yuan, the focus for rural clean heating, open pit mine remediation, new energy vehicle application, shutting down out of thermal power and other aspects. Specific details are as follows.

First, support for air pollution control

Continue to increase investment, air pollution control for the central funds 6.372 billion yuan, accounting for 31.9% of the total size of the national capital, the total ranks first in the country; the provincial capital issued 8.93 billion yuan, an increase of 6.78 billion yuan over the previous year, investment as the largest ever. Strong support "double generation" implementation of the project, the timely disbursement of rural "double generation" subsidies 6.627 billion yuan to protect people's warm winter; newly acquired Handan, Xingtai, Cangzhou, Zhangjiakou City 4 become a pilot clean warm winter, the province currently 8 atmosphere contamination of the transmission channel and the city of Zhangjiakou city have all been incorporated into the national pilot for three years will receive a total of 14.1 billion yuan of central funds.

What should pay attention to the flat solar collector for solar water heater boiler hot start? (L) Unit hot start, if the boiler is cold, the boiler should start operating program parameters cold start sliding manner. (2) a hot start, the steam turbine main steam parameters required turn red at a temperature greater than the high pressure cylinder inner wall temperature of 50 ℃, and there are 50 deg.] C superheat, but considering the safety apparatus to the boiler, a main steam temperature should be below the rated steam temperature value 50 ~ 60 ℃. (3) unit starts, if the boiler pressure should only after the ignition is turned on in a secondary, or bypass and valve to the air exhaust. (4) reheat steam inlet steam temperature should not exceed 400 ℃ :, if a bypass desuperheating water can not put into use, the main steam temperature not higher than 450 ℃. (5) due to the high hot start parameters, should be increased steam flow through, to avoid overheating the wall, adjust combustion.

SUMMARY major maintenance system 1 gas flat solar collector for solar water heater boiler, burner maintenance: cleaning gas Burner full turn cup, ignition means, filter, pump, motor and impeller systems, the lubricant added to the throttle linkage arrangement. Re-awarded for combustion testing. 2, the controller Maintenance: Maintenance detecting electrical components, control lines, the control box clean ash collection, each control point is detected. Finally sealed. Controller element to prevent the moisture. 3, water supply system maintenance: repair water treatment plant to check whether water quality standards, a comprehensive clean-water treatment system, to check the functioning of the pump and lift, check that each pipe valves can be used flexibly and so on. Water and electricity, the system closes the valve after each filled with water. 4, furnace maintenance: In order to make the boiler safe and economic operation lasting, must in daily use, strengthen the maintenance of the boiler. This is also to prevent lower thermal efficiency, an important measure to avoid the use of state of deterioration and boiler accident.

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