economizer in boiler

The economizer is a device installed in the lower part of the flue of the boiler to recover the waste heat of the exhausted smoke. The boiler economizer is a tube heat exchanger located in the final part of the convective duct. In the economizer, water flowing into the boiler is preheated by flue gases. In boilers, economizers are heat exchange equipments that heat water to a temperature close to boiling point. Economizers make use of the enthalpy in the hot streams. Because the streams are usually still not hot enough to be used in a boiler, economizers recover the more useful enthalpy and improve the boiler's efficiency.

Pressure steam boiler fuel metering principle of divide and PT gear pump: Xiao Bian told you about the fuel metering principles of steam boiler steam boiler pressure division and PT gear pump pressure rating of Henan fast Boiler Company in accordance with the boiler outlet steam pressure range division. Boiler pressure is 0.04 MPa or less will generally boiler outlet steam pressure of 1.9 MPa or less boiler, called the low-pressure boiler; boiler outlet steam pressure of about 3.9 MPa boiler, called medium pressure boiler; boiler outlet water a vapor pressure of about 9.8 MPa boiler, called high pressure boiler; boiler outlet steam pressure of about 13.97 MPa boiler, called pressure boiler; steam boiler outlet steam pressure of about 17.3 MPa boiler, called subcritical pressure boiler; boiler outlet steam pressure in the boiler above 22.12 MPa, known as supercritical pressure boilers.

To further promote air pollution control tough fight, push the air quality continues to improve, according to "Zhengzhou City, the 2018 campaign of air pollution control plan" and "Chung Dong New Area, the 2018 campaign of air pollution control plan" requirements, the area to carry natural gas boiler low nitrogen renovation work, hereby notify the relevant issues as follows:

(1) before the end of September 2018, Eastern 4 tons of steam boiler and above the implementation of low-nitrogen gas engineering construction and renovation. Encourage the implementation of other gas-fired low-nitrogen transformation.

Promote the transformation of low nitrogen gas boiler according to early completion, and more reward principles, decreasing year by year funding award up mode. Before the end of June 2018 to complete the construction of low-nitrogen transformation, the concentration of nitrogen oxide emissions or else higher than 30 mg / cubic meters of gas boilers, carried out in accordance with the award make up 40% of equipment investment; before the end of September 2018, to complete the low nitrogen renovation project construction, the concentration of nitrogen oxide emissions or else higher than 30 mg / cubic meters of gas boilers, carried out in accordance with the award make up 30% of equipment investment; before the end of April 2019 to complete the project construction and renovation of low-nitrogen, nitrogen oxides Or emission concentration higher than 30 mg / cubic meters of gas boilers, carried out in accordance with the award make up 15% of equipment investment;

After construction is completed, the project in a timely manner to submit an application to the territorial review township (town) office: the township (town) office on a preliminary review of the whole process of the project, the project area through on-site verification of materials (including: project implementation plan, completion report, monitoring reports, on-site verification opinions, etc.) reported the construction of the Environmental Protection agency, the EPA reported by the construction of the Municipal Environmental Protection Bureau atmosphere, the atmosphere at the Municipal Environmental Protection Bureau organizations to monitor third-party monitoring mechanism for acceptance, qualified after monitoring the municipal government finance awards complement funds, unqualified deadline for rectification.

Boiler requirements temperature does not exceed 90 ~ 100 ℃ deoxygenated water, oxygen and the use of thermal water temperature exceeds 100 ℃, and how? Boiler water requirements are in addition to the peroxide, the water temperature does not exceed 90 ~ 100 ℃, which the system uses a thermal deaerator is not easy to do, but in the field can take appropriate measures to resolve this conflict. The key is to limit the temperature of the boiler drum Sheung thick-walled, high temperature furnace cooling Sheung, easy to form the inner and outer walls of a large temperature difference, resulting in thermal stress is large, so long as the temperature of the feedwater entering the lower drum i.e. solve this problem.