deaerator function on the boiler

Since the emergence of circulating fluidized bed combustion technology, circulating fluidized bed deaerator function on the boilers are widely used, large-capacity circulating fluidized bed boiler has been accepted by the power generation industry in the world.There are two types of power plant boilers(Utility boilers): pulverized coal boilers and circulating fluidized bed boilers.

The main effect of heat and then there are two, one is to reduce the humidity of water vapor, help to protect the turbine blade; the second is restrained to increase the relative rate and absolute turbine internal efficiency. Heated again by the high pressure exhaust cylinder is returned to the deaerator function on the boiler steam turbine, and then to the low pressure cylinder expansion work. Purpose is to make the steam turbine last stage blades and humidity controlled within the allowable range.

Recently, Hangzhou Provincial People's Government for the quality of atmospheric environment issues issued a deadline for compliance plan, as follows.

First, the situation and challenges

Since the "Atmospheric ten" implementation of Hangzhou to build an ecological civilization as a guide to improve the quality of atmospheric environment as the goal, carry out air pollution prevention and control actions to protect the G20 summit in Hangzhou as an opportunity to promote a strong "coal-fired flue gas, industrial emissions , vehicle exhaust, dust gray gas, urban and rural exhaust "other" gas cohabitation ", strengthen regional joint prevention and control, air pollution control and achieved remarkable results, no built coal-fired thermal power, iron and steel producers no, no emission vehicles "three noes" urban atmospheric environmental quality continues to improve.

(A) Key Performance

1, ambient air quality improved significantly.

In the case of the national economy with an average annual growth of 9.1% of the "second five" major pollutants emission reduction achieved remarkable, sulfur dioxide, total nitrogen oxide emissions compared to 2010, respectively, decreased by 21.9%, 26.5%, exceeding the state-assigned the reduction targets and tasks.

2, energy and industrial structure gradually optimized.

The city's total energy consumption growth narrowed year by year, total energy consumption in 2015 was 39.48 million tons of standard coal, an average annual increase of "Twelfth Five-Year" period is only 3.4%, compared with the "Eleventh Five-Year" down 2.1 percentage points.

3, industrial pollution prevention deepened.

Promoting desulfurization and denitrification and dust removal facilities, coal-fired thermal power generating units are completed desulfurization, denitrification facilities, a total of 87 coal-fired thermal power generating units ultra-low emissions transformation.

4. The motor vehicle exhaust pollution prevention and continuous progress.

"Twelve Five" period, and comprehensively promote the yellow car out of work in 2015, the city basically eliminated emission vehicles.

5, comprehensively promote urban and rural waste gas treatment.

"Twelve Five" period, to strengthen the construction site dust management, the establishment of civilized city construction sites and construction dust pollution comprehensive rectification work leading group, the establishment of municipal, district, enterprise level management network.

6, continue to strengthen capacity building.

"Twelve Five" period, the construction of Hangzhou, air pollution control system for continuous improvement, introduced the "Hangzhou pollution prevention provisions of the atmosphere", and the issuance of the annual air pollution control plan and supporting the implementation of assessment methods.

(B) there is a problem

1, ambient air quality improvement into the bottleneck.

In recent years, the effectiveness of atmospheric environmental quality improved significantly, but control "Ambient Air Quality Standard" (GB3095-2012) secondary standards are still gaps.

2. Regional collaborative governance is still run-in period.

The analysis results Hangzhou PM2.5 sources, the contribution to the local discharge air in an urban environment PM2.5 concentration 62% -82%, about 72% on average. Regional transport to urban ambient air concentrations of PM2.5 contribution accounts for 18% -38%, an average of about 28%, in different seasons affect the Hangzhou area varies. A higher proportion of regional transport and complexity of the transmission source region to control air pollution in Hangzhou more difficult to establish and improve regional air pollution is critical institutional mechanisms of joint prevention and control.

3, into the deep water of air pollution control.

In recent years, Hangzhou, air pollution prevention and control work has achieved remarkable success, but there are still many "shortcomings" in the current governance of air pollution, structural, further highlights the deep-seated problems.

(1) optimize the industrial structure needs to continue, heavy pollution in some areas, high energy-consuming industries and the "messy dirty" business issues are still quite prominent.

Total coal (2) Energy consumption is still high, the use of natural gas supply capacity and scale need to be strengthened, industrial parks (industrial parks) are still blind spots of central heating, renewable energy development and utilization efforts still need to increase.

(3) heavy end of the treatment, the light source control and cleaner production, the work of "second five" major emission control measures revolve around the end of pollutants on source control and cleaner production process is still insufficient attention.

(4) With SO2, NOx reduction work continued in-depth, project emissions space shrinking, VOCs emissions is more a lack of technical means, the rigidity of the vehicle population growth, vehicles, ships and non-road mobile machinery and other mobile source pollution control to be a breakthrough. With the difficulty of the work of prevention and control of atmospheric pollution key areas continue to increase, the city is still on air pollution control into the deep water.

4, the basic work is still weak period.

Municipal government attaches great importance to air pollution control work, work-related basis more solid, but there are still many weak links. Hangzhou, organization and leadership of atmospheric pollution control systems should be strengthened, the department division of labor, the working mechanism of collaborative governance needs improvement. Local standards should be further improved, pollution resources and a list of atmospheric pollution still need to be updated regularly.

Food enterprises in the process often used to steam, especially bread or biscuits and dairy enterprises to use more frequently, can provide a stable steam deaerator function on the boiler is particularly important. Professional steam boiler with good thermal energy conversion and stable continuous output capability, not only can help businesses complete and efficient processing operations can also maintain food hygiene. Fast boiler will lead us together to understand the use of steam boilers in the food processing industry, mainly processing technology.

deaerator function on the boiler Related Information

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2017-12-3 · A Deaerator is a device for air removal. In industry it is used to remove dissolved gases (an alternate would be the use of water treatment chemicals) from water to make it non-corrosive. Contents[show] Details With reference to a thermal power station, the word deaerator

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2010-1-1 · A deaerator energy balance then can be developed to determine deaerator steam usage and other energy data needed for a critique of the entire steam system (Figure 4). After establishing condensate return and deaerator steam usage per thousand pounds of steam produced, an overall energy balance of the boiler can be developed.

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For the appropriate function of the boiler & in order to evade corrosion in the boiler, the deaerator is used. In this, the contaminations which are there in the feed water will be detached. This article discusses the deaerator definition, working principle, its types, pros, cons, and its applications. What is the Function

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Deaerator - an overview ScienceDirect Topics

Deaerator Cracking: A deaerator is a device widely used to remove oxygen up to 7 ppb and other dissolved gases like carbon dioxide completely from feedwater to steam-generating boilers. Environmentally assisted fatigue cracking of deaerators has been reported at the head-to-shell weld below the water level in the storage compartment.

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Deaerator working principle, Types and Process

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Deaerator Introduction. Mechanical and chemical deaeration is an integral part of modern boiler water protection and control. Deaeration, coupled with other aspects of external treatment, provides the best and highest quality feed water for boiler use.

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Deaerator - Wikipedia

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