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the cautious layout of the horizontal boiler chimney

The horizontal boiler, as a heat engine, has offered enough power for china’s industrial production. With the increasing application of the boiler, the problems raise. This passage will introduce the reasonable layout of the boiler’s chimney. After purchasing a boiler , the buyer need to install a chimney according to the boiler size and the site. The following are the relevant installation notions of the steel chimney and the brick chimney. notions for steel boiler chimney:

1.the steel chimney should be tough and hard enough. The chimney’s thickness should bear certain corrosion allowance. When the height of the chimney reaches 20~40cm,the diameter 0.2~1.0 m, the thickness of the body wall without liner should be 4~10mm, the body with liner should be 8~18mm.

2.The steel chimney’s lining can be born in subsection, the cracks between every two sections of 4~6m should be 20~50mm long. And the protection board should be installed on the top of the chimney. The chimney and the basic connection are made to conical support plate with the thickness of 20~40mm.

3.The steel chimney is better to choose the stainless steel one manufactured by the specialized factor. When the ratio of the chimney to the diameter exceed 20, a liable traction rope must be set, the rope should be 3~4 along the circle. Notions for the brick chimney :

1.the height of the brick chimney should not more than 50m. The chimney should be equipped with maintenance ladder and lightening rod. Meanwhile, the bottom of the chimney should be set with a 0.5~1.0m dust hole.

2.If there are two connections between the chimney and the horizontal flue, the two connections should be set in the opposite direction and be separated with a board . The part higher than the horizontal flue should not less than its half.

Boiler thermal efficiency of gas analysis and precautions 1, gas thermal efficiency thermal efficiency of boilers, there are two test methods: a positive balance and counter-balance testing methods testing methods. Positive balance efficiency of the boiler can only be a reflection of the overall operating efficiency of the boiler, whether to meet the design efficiency of the boiler, the boiler produces specific heat loss in any place and can not be a positive balance efficiency test results reflected. Counter-balance calculation boiler efficiency can be more clearly reflect the influence of reason operating efficiency boiler efficiency by counter balance test results, analysis of data, to propose solutions and suggestions to improve the thermal efficiency of the boiler. In this paper, counter balance method of testing efficiency of the thermal efficiency of the gas boiler tested according TSGG0003-2010 "industrial boilers energy efficiency testing and evaluation rules" simple case the thermal efficiency of operating the boiler test results according to equation (1) is calculated: ηj = 100- (q2 + q3 + q4 + q5 + q6) (1) where: ηj- thermal efficiency of the heat losses q3- q2- incomplete combustion gas heat losses q4- incomplete combustion of solid fuels physical heat loss q6- heat loss heat loss q5- gas boiler fuel gas, the absence of a solid fuel incomplete combustion heat loss, so q4 is 0. Ash content after combustion of the fuel is very small, negligible Q6, thus reducing heat loss factor of gas from the boiler heat losses on q2, incomplete combustion gas heat losses Q3, heat loss q5 determined. As used herein, ecomJ2KN type flue gas analyzer smoke components, test data import industrial boilers energy efficiency calculation and comparison test management platform. From the above, it is affecting the thermal efficiency of the boiler heat losses mainly q2, followed by heat loss q5. Q3 incomplete combustion heat loss difference between the minimum boiler; heat loss q2 maximum difference, part of the boiler heat losses as high as 20.61% # 10 boiler; αpy excess air ratio difference is large, up to 4.03; exhaust gas temperature tpy Similarly large difference, up to 206.00 ℃. 2 Notes: 1) strictly control the scale layer; 2) control the air-fuel ratio; 3) the timing of the boiler clean-up; 4) increase the use of energy-saving equipment. In summary, the main gas boiler thermal efficiency and q2, q3 and q5 related, in the course of the boiler should always pay attention to issues related to the above parameters, so that the boiler in order to achieve efficient operation, to achieve energy saving purposes.

What are the advantages of low nitrogen condensation condensed low-nitrogen is widely used in major civil and commercial establishments, such as used in civilian duplex villas and commercial hotels. Its operation is easy, using plc controller, configure a higher level, you only need a touch-screen buttons to control the entire operation of the boiler, the boiler used after the liberation of the human species, can also reduce the cost of human custody. So the condensate low nitrogen What are the advantages of it? 1. The first long life and good weather resistance (excellent antifreeze properties) condensing low nitrogen may be used in various environments, in the northern region may be accessible applications. It has frost protection function, when the water in the boiler is lower than the set value, automatic operation of the heating, the temperature to be agreed with the water automatically stops match, it is possible to protect the device itself and its auxiliary equipment. 2. good corrosion resistance not only design the structure of science, the system of operational excellence, both to prevent low temperature, corrosion, also avoid cold shock tube wall of the furnace, so it's durability, service life is longer. The second use of security (over-temperature, water alarm) this has been designed to consider safety issues, set up multiple security mark. It has over-temperature alarm, i.e., water will automatically stop when the ultra-high heat, and performs over-temperature alarm, until the fault can be completely released only need to manually reset; also has water protection, can automatically shut down when water is and the alarm, preventing dry. The third high thermal efficiency (energy sufficient, good energy) such domestic professional larger heating surface, its high heat transfer efficiency, maximize the heat transfer enhancement effect. Moreover, the good outer protective layer useful effect, to ensure a constant temperature glass wool, to prevent a large number of relatively small radiating its heat loss, can make full use of energy, energy efficient. These are the advantages of low nitrogen condensation. In summary, good safety performance of this type of boiler, high thermal efficiency, able to adapt to the security needs of practical work to ensure safe and efficient in operation at. Strong its user-friendly design, digital control system prevents human error, reduces operational input costs, overall cost is high.

10th June this year, the provincial government agrees that the ecological environment in Zhejiang Province Office issued the "Notice on the implementation of special emission limits national emission standards of air pollutants" (hereinafter referred to as "notice"), marking the full implementation of Zhejiang Province especially national emission limits of air pollutants.

"Special emission limits" is mainly for land development density is already high, the environment carrying capacity began to weaken, or less atmospheric environmental capacity, ecological environment is fragile, more stringent prone to serious air pollution problems in sensitive areas and set the emission limits. Implementation of the national emission standards for special emission limits, Zhejiang Province in favor of further strict pollution management, reduce pollutant emissions, to further improve air quality, but also help promote the integration of the Yangtze River Delta environmental standards.

In fact, back in 2013, Zhejiang has already begun in some areas particularly the implementation of the national emission standards limit emissions of air pollutants, but was limited to Hangzhou, Ningbo, Huzhou, Jiaxing and Shaoxing, Hangzhou Bay five cities; and this is to expand to the province level. In addition to a wider geographical range, "advertisement" clearer pollutant emissions targets, e.g., volatile organic contaminants not individual indicators, including not only non-methane hydrocarbons, total volatile organic compounds such as benzene, benzene and other pollutants indicators meet the definition of volatile organic compounds should be performed; also more involved in the industry, such as boilers only provides original coal-fired boiler, and "notice" it covers all types of boilers (including oil, gas).

It is reported that, in the national emission standards have been implemented, a total of 25 standards set emission limits of air pollutants in particular; at the same time, the recent ecological Ministry of Environment and the State Administration of market regulation has released three national emission standards of air pollutants, namely, pharmaceuticals, paints, inks and adhesives and volatile organic compounds fugitive emission control standards, and will be from July 1, 2019 implementation. According to "notice" requirement, the province is also involved in the enterprise should implement special emission limits specified in the three standards, the execution time of the emission standards time synchronization. Provincial Department of Atmospheric environment Department official said: "The implementation of the national emission standards for emission limits in particular, help to further strict management of our province pollution, reduce pollutant emissions, to further improve air quality, but also help promote environmental protection in Yangtze River Delta standard integration. "

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