White smoke heating eliminating device and method for smoke of fossil-fuel power station

A flue gas heating, thermal power plant technology, applied in lighting and heating equipment, etc., can solve the problems of high operating cost, high investment, large system, etc., to prevent equipment damage or safety accidents, reduce investment costs, and improve heat exchange efficiency effect

CN109631071AInactive Publication Date: 2019-04-16李申强
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-04-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a white smoke heating eliminating device and method for smoke of a fossil-fuel power station. The white smoke heating eliminating device comprises a smoke duct for dischargingthe smoke after being desulfurized and is characterized by further comprising a sleeve heater which is arranged on the outer side wall of the smoke duct, and steam connecting ports for introducing steam and drainage ports for discharging condensed water are arranged on the sleeve heater. The sleeve heater which is arranged on the outer side wall of the smoke duct communicates with A low-pressure air exhaust air source introduced to a turbine through the sleeve heater which is arranged on the outer side wall of the smoke duct in a sleeving mode enables the smoke to be heated up to achieve the purpose of completely eliminating white smoke. According to the white smoke heating eliminating device and method for the smoke of the fossil-fuel power station, the invest cost is reduced by above 90%and does not exceed one tenth of the invest cost of a frequently-used MGGH system, the internal structure of the smoke duct is not influenced, and the changes of resistance of the smoke are tiny according to testing measurement. According to the white smoke heating eliminating device and method for the smoke of the fossil-fuel power station, low-pressure air exhaust of the turbine is adopted as aheating air source, steam condensed water is fully used, and the operating cost of the white smoke heating eliminating device and method is far lower than the operating cost of the frequently-used MGGH system.
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Description

technical field

[0001] The invention relates to the technical field of environmental protection equipment for thermal power plants, in particular to a device for heating and eliminating white smoke with flue gas in a thermal power plant and a method for heating and eliminating white smoke. Background technique

[0002] According to the national air pollution prevention and control plan, the environmental protection policies of some provinces and cities require that the flue gas after desulfurization in thermal power plants should be dehumidified and whitened. The currently commonly used desulfurization and white smoke elimination equipment is the MGGH system, such as figure 1 As shown, the flue gas enters the desulfurization tower after being dedusted by the dust collector, and the desulfurized flue gas is heated by the flue gas heater and then discharged through the chimney. Among them, the flue gas heater is heated by the water heated up by the hot water heater, and the w...

Examples

Embodiment Construction

[0024] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as Figure 2-3 As shown, a device for heating and eliminating white smoke of flue gas in a thermal power plant includes a flue 5 for discharging flue gas after desulfurization. The diameter of the flue 5 is 8.2m. Sheet 2 is made of a titanium plate with a thickness of 1 mm, and there are 250 sheets in total.

[0026] The flue gas heating and white smoke elimination device also includes a sleeve heater 6 with a height of 10m arranged on the outer wall of the flue 5. The sleeve heater 6 is made of 8mm Q235 steel plate. The sleeve heater 6 The distance between the outer wall and the outer wall of the flue 5 is 150 mm, and a reinforcement plate 7 is arranged at an interval of about 1 m in the cavity formed by the inner wall of the sleeve heater 6 and the outer wall of the flue 5 .

[0027] The rated pressure of the sleeve heater 6 is 0.6 MPa, a...