Flue gas moisture recovery experimental device

Abstract

The invention discloses a flue gas moisture recovery experimental device which is characterized in that a flue gas burner is arranged at the bottom of a combustion chamber, a combustion chamber air supply outlet is formed in the side surface of the lower part of the combustion chamber, and an outlet of a fuel gas storage tank is communicated with an inlet of the flue gas burner; an explosion-proof door is arranged on the side of the combustion chamber; a water mist spraying head is arranged in the vertical flue, and an outlet of the spraying water collecting tank is communicated with the water mist spraying head; a flue gas water taking heat exchanger is arranged in the second horizontal flue, and a heat absorption side outlet of the flue gas water taking heat exchanger is communicated with a heat absorption side inlet of the flue gas water taking heat exchanger through a water taking heat exchanger circulating water pump, a radiator and a flow meter; a water taking heat exchanger lower water collecting tank in the flue gas water taking heat exchanger is communicated with a recycled water collecting tank; and the water taking heat exchanger outlet flue and the second horizontal flue are both provided with flue gas sampling and measuring ports. The device is high in measuring accuracy, high in anti-interference capacity, convenient to install and operate and low in investment cost and maintenance cost.

Description

technical field [0001] The invention belongs to the field of thermal power generation equipment, and relates to a flue gas moisture recovery experimental device. Background technique [0002] Coal-fired generator sets are the main force of my country's power supply, and they are also the key to saving energy, controlling coal-burning pollution, and solving environmental problems. Most of my country's coal power bases are located in the northern arid areas with "more coal and less water". The most urgent problem is to use the flue gas moisture recovery technology of coal-fired generating units to reduce the consumption of water resources. For coal-fired generating units in arid and water-scarce areas, although water-saving technologies such as air cooling and dry slag discharge have been used to reduce the water consumption of coal-fired generating units, they still cannot meet the increasingly stringent ecological and environmental protection requirements. [0003] Coal-fir...

AI Technical Summary

Problems solved by technology

Affected by the shortage of coal sources in the current coal market, coal quality changes, and coal moisture fluctuations, the moisture in the boiler flue gas fluctuates frequently, which has a significant impact on the water intake of the water intake test device, thereby affecting the test measurement accuracy

[0006] (2) Affected by unit load fluctuations, it has a greater impact on the moisture content of water intake flue gas and flue gas temperature, which affects measurement accuracy; with the increase in installed capacity of new energy power generation such as wind power, solar energy, and biomass energy, thermal power generating units operate normally The current mode of operation based on peak regulation has become the new normal. Because new energy power generation is affected by various objective factors, the load of thermal power units fluctuates frequently, and the power grid is currently controlled by AGC of a single unit, which makes the constant load of the unit stable for a long time. The probability of operation continues to decrease. The above factors lead to large fluctuations in the boiler load. After the boiler load fluctuates, the amount of coal burned and the temperature of the flue gas also fluctuate, which makes the flue gas temperature, flue gas moisture content, and flue gas volume change irregularly. It will lead to disorderly changes in the boundary conditions of the flue gas water intake test device, which will affect the measurement accuracy of the test device

[0007] (3) The installation and operation of the test bench are limited

According to the conventional layout of the boiler flue of the power station, the flue of this section is suspended in the air, and the height is between 3-15 meters, and there are relatively many elbows. It is necessary to install the water intake test device in this area, the flue of the water intake test bench, and the water pipeline , fan, and control system take up a lot of space, and the site conditions are severely restricted

At the same time, the operation of the test bench is greatly affected by the operation mode of the unit, but when the unit is shut down, the experimental device will not be able to operate

[0009] (4) High construction cost

According to the conventional layout of boiler flue in power station, this section of flue is suspended in the air, and the height is between 3-15 meters. When installing the water intake experiment device, it is necessary to support or fix the flue, furnace smoke fan and water pipeline, and at the same time It is necessary to build a separate house for the placement of the experimental electronic control system and the experimental site, so the construction cost of the water intake experimental device is very high

[0011] (5) Large amount of maintenance

[0013] To sum up, there are problems to be solved and optimized in terms of measurement accuracy, anti-interference ability, installation and operation conditions, construction investment, and maintenance amount of the flue gas moisture recovery experimental device currently installed in the power station.

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