How to install kermi heating radiators correctly. Installation installation of kermi radiators. Do-it-yourself installation of a radiator with side connection

Temperature drop flue gases can be implemented through:

Selection optimal sizes and other characteristics of the equipment based on the required maximum power, taking into account the estimated safety margin;

Intensification of heat transfer to the technological process by increasing the specific heat flux (in particular, with the help of swirlers-turbulizers that increase the turbulence of the working fluid flows), increasing the area or improving the heat exchange surfaces;

Flue gas heat recovery using an additional technological process (for example, heating additional feed water using an economizer);

. installing an air or water heater, or arranging preheating fuel from flue gas heat. It should be noted that air heating may be necessary if technological process requires high temperature flame (for example, in the glass or cement industry). Heated water can be used to feed the boiler or in hot water supply systems (including centralized heating);

Cleaning of heat exchange surfaces from accumulating ash and carbon particles in order to maintain high thermal conductivity. In particular, soot blowers can be used periodically in the convection zone. Cleaning of heat exchange surfaces in the combustion zone is usually carried out during equipment shutdown for inspection and maintenance, but in some cases cleaning without shutdown is used (for example, in refinery heaters);

Ensuring the level of heat production corresponding to existing needs (not exceeding them). Thermal power boiler can be adjusted, for example, by selecting the optimal bandwidth liquid fuel injectors or optimal pressure under which gaseous fuel is supplied.

Possible problems

Flue gas temperature reduction under certain conditions may conflict with air quality objectives, for example:

The preheating of the combustion air leads to an increase in the temperature of the flame and, as a result, to a more intense formation of NOx, which can lead to exceeding the established emission standards. The introduction of air preheating on existing installations may be difficult or not cost effective due to lack of space, the need for additional fans, and NOx suppression systems (if there is a risk of exceeding regulations). It should be noted that the method of suppressing the formation of NOx by injecting ammonia or urea involves the risk of introducing ammonia into the flue gases. Preventing this may require the installation of expensive ammonia sensors and an injection control system, and - in the case of significant load variations - complex system injection, which allows the substance to be injected into an area with the correct temperature (for example, systems of two groups of injectors installed at different levels);

Gas cleaning systems, including systems for the suppression or removal of NOx and SOx, operate only in a certain temperature range. If established emission standards require the use of such systems, the organization of their joint operation with recovery systems may be difficult and cost-inefficient;

In some cases, local authorities set a minimum flue gas temperature at the outlet of the pipe to ensure adequate flue gas dispersion and the absence of a flue flare. In addition, companies can own initiative apply this practice to improve their image. The general public may interpret the presence of a visible smoke plume as a sign of pollution environment, while the absence of a smoke plume can be seen as a sign cleaner production. Therefore, under certain weather conditions, some enterprises (for example, waste incinerators) can specially heat flue gases before being released into the atmosphere, using natural gas. This results in wasted energy.

energy efficiency

The lower the flue gas temperature, the higher the level of energy efficiency. However, reducing the temperature of gases below a certain level can be associated with some problems. In particular, if the temperature is below the acid dew point (the temperature at which water and sulfuric acid condense, typically 110-170°C depending on the sulfur content of the fuel), corrosion can occur. metal surfaces. This may require the use of materials that are resistant to corrosion (such materials exist and can be used in installations using oil, gas or waste as fuel), as well as the organization of the collection and processing of acid condensate.

The payback period can range from less than five years to fifty years, depending on a variety of parameters, including plant size, flue gas temperature, etc.

The strategies listed above (with the exception of periodic cleaning) require additional investment. The optimal period for making a decision on their use is the period of design and construction new installation. At the same time, it is also possible to implement these solutions at an existing enterprise (if there are required space for equipment installation).

Some applications of flue gas energy may be limited due to the difference between the temperature of the gases and the demand for certain temperature at the input of the energy-consuming process. The acceptable value of this difference is determined by the balance between energy saving considerations and the cost of additional equipment needed to use the flue gas energy.

The practical possibility of recovery always depends on the availability of a possible application or consumer for the recovered energy. Measures to reduce the flue gas temperature can lead to an increase in the formation of some pollutants.

Flue gas and air temperature entering the smoke box should not be higher than 500 ° C. You cannot overestimate the volume of the smoke box (it is difficult to create the necessary heat stress in a large smoke box), but you cannot underestimate its size - it is difficult to create the necessary vacuum in a small smoke box: it will not cope with large quantity flue gases and air. Each fireplace has its own smoke box according to its size. The internal surfaces of the smoke collector must be smooth." At the level of the pass, a hermetically sealed cleaning door must be installed on either side.

As noted above, the combustion of fuel in fireplaces proceeds with a multiple excess of air. The fireplace does not have an entrance door, the path of smoke from the firebox to the room is blocked by a constant flow of air directed from the room to the hearth and then through the chimney to the atmosphere. In order to pass all this volume of flue gases and air, the chimney must be of sufficient section with an extremely smooth inner surface. cross section chimney must correspond to the cross-section of the entrance opening of the fireplace. It is known that the higher the chimney, the more draft is created in it. This should be taken into account, but on the basis of this, the section of the chimney should not be underestimated.

According to Swedish researchers, the ratio of the cross-sectional area of ​​a rectangular chimney to the area of ​​the fireplace inlet with a chimney height of 5 m should be 12 percent; with a chimney height of 10 m - 10 percent.

Buying steel panel Radiators Kermi, Korado, KZTO you have the opportunity to immediately order and install them or get this service For a present. Check with managers for details. Our highly qualified specialists have more than 10 years of experience and will be happy to install pipelines for you, lay underfloor heating, connect radiators, boilers and other heating equipment.

Installation of a heating system from steel pipes carried out at the prices of metalwork and welding works.
The organization assembles bathroom furniture and installs accessories at contractual prices.
Civil works calculated additionally.
The price list contains prices excluding discounts and seasonal promotions and transportation and procurement costs.
Prices include VAT, payment is made in rubles.