In gas-fired boiler, a circulating pump is generally built. The main characteristic parameters of the circulation pump comprising: a head, flow, shaft power, efficiency and the like. 1. The pump head △ P unit weight of the liquid obtained after the circulation pump mechanical energy, reflected the increase in hydrostatic pressure in the pipeline, units KPa, mbar, mH2o like. Discharged from the pump flow rate Q 2 of the fluid volume or mass per unit time, in units of m3 / h, L / s, Kg / h the like. 3. The prime mover shaft power P shaft power or the transmission power transmitted to the pump shaft, called the pump unit is KW. 4. Efficiency n ratio of the output power to input power referred efficiency of the pump.

According to the actual situation and the hot water boiler feed water return temperature: annotate water temperature, return water temperature in the boiler and pressure plate according to GB3166-82 standard. Usually the actual supply and return water adjusting method according to winter heating, the water quality of the law can be changed and the flow rate of the boiler feed water circulation boiler temperature adjustment. Thus, hot water boiler water temperature can be adjusted as desired.

Recently, the letters and the ecological environment unit, the letter of "boiler air pollutant emission standards" in the "gas boiler exhaust pipe predetermined height of not less than 8 meters, within 200 meters from the building around the radius of the new boiler room chimney when was the tallest building in which the chimney should be higher than 3 meters "requirement questions.

First, the new urban gas boiler chimney should be performed outside the specified height is 3 meters above the surrounding buildings (there are many communities within 200 meters around the building height higher)?

Second, on the 20t / h steam boiler and above, and more than 14MW hot water boiler to be installed pollution-line monitoring equipment, this means that a single 14MW boiler or boiler means the total audience of 14MW?

Third, for example, I have more than 2MW heating station natural gas hot water boiler 7 units, exhaust gas through the two exhaust pipe emissions, the need to install pollution monitoring equipment?

A "boiler air pollutant emission standards" (GB13271-2014) states that "fuel, gas boiler stack height of not less than 8 m, particularly boiler stack height is determined by the EIA document approved. Chimney around the new boiler room when there is a building within a radius of 200 meters, the tallest building in which the chimney should be higher than 3 meters. when there is a building within 200 meters around the new boiler house chimney radius, "according to the provisions in the new urban area gas boiler should be implemented", the chimney should be higher than the provisions of the tallest buildings in more than 3 meters, "the.

Two, 20t / h steam boiler and above, 14MW and more hot water boiler must be installed in the line monitoring apparatus contaminants "14MW and more hot water boiler" means a single boiler.

Third, on the "exhaust gas through the two exhaust pipe emissions, the need to install pollution monitoring equipment" problem, according to "People's Republic of China Air Pollution Prevention Law" Article 24 "key sewage units should be installed, using air pollutant emissions automatic monitoring equipment, and environmental protection departments to monitor network devices, monitoring equipment to ensure the normal operation of public and emissions information in accordance with law. "provisions, as well as the" State Council on the issuance of three-year action plan to win the blue sky to defend the notice "(Guo Fa [2018 ] No. 22) "outfall height of over 45 meters of elevated source, as well as petrochemicals, chemicals, packaging, printing, painting and other VOCs emissions from industrial sources focus, the focus of sewage into the Directory of key areas should be basically completed by the end of 2019 to install flue gas automatic monitoring facilities, the country should be basically completed by the end of 2020 the automatic installation of flue gas monitoring facilities. "requirements, if the exhaust pipe where the company was listed as key units of sewage, flue gas monitoring facilities should be installed automatically, otherwise, no installation.

Your business does not need to be szl4-1 25 1 6-aii steam boilers, steam boilers can see at a glance the output of the high-temperature steam, and have sufficient thermal energy conversion effect in many areas have played a decisive role. We took a few more frequent use of steam boilers to the industry, for example, look at your business or need to use steam boilers. First, the area of ​​the pharmaceutical industry, the pharmaceutical industry is the use of a large steam boiler industry, whether it is a hospital or pharmaceutical companies can not do without steam. Hospital is a multi-use steam for a variety of medical machines or ward disinfection; drying the pharmaceutical industry in addition to sterilization, but also can take advantage of the steam boiler boiling process and capsules repression. This is mainly due to high temperature steam boiler steam output of good quality, high environmental performance, hospitals and pharmaceutical companies to meet the needs of the environment and quality. Second, the petrochemical industries in the petrochemical industry, in order to achieve high-quality petroleum refining, usually using steam boiler heating refining, oil in the high-temperature material can be reasonably converted and, with automated functions run steam boiler, fast and efficient processing, petrochemical processing industry and allow better development in saving energy and reducing polluting emissions from consumption of processing advantages. Third, food processing food processing use of the Central Standing Committee to assist in the operation of steam boilers, especially biscuits and bread or meat processing plants, often requires the use of a steam boiler. Drying or curing may be sterilized and distillation operations during food processing by a steam boiler, so that all kinds of food producing finished product under heat influence of high temperature steam. In summary, the three major industry is fast boiler steam boiler tells everyone commonly used, due to the conversion of thermal energy to be mainly steam stability and strong safety, but also makes good quality and good after-sales Steam boiler obtain the favor of many areas in the market, more and more and as the optimization of steam boiler technology in the production of continuous improvement also continued popularity of usable area.

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