Desulfurization wastewater zero discharging system and method based on waste heat reuse under low-load working condition
A desulfurization waste water, low-load technology, applied in the direction of chemical instruments and methods, separation methods, gaseous effluent waste water treatment, etc., can solve the problems of increasing boiler exhaust heat loss, boiler exhaust heat loss increase, etc., to ensure The effect of denitrification efficiency, increasing flue gas temperature, alleviating scaling and clogging
Pending Publication Date: 2018-05-01
DATANG ENVIRONMENT IND GRP
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Benefits of technology
This technology solves issues with excessive nitrogen oxide (NOx) emissions from combustion engines due to poor fuel economy or high NOx levels during winter months when there may be no power grid available for electric vehicles. It also addresses overall these technical benefits that improve environmental performance and save money on resource usage compared to current methods such as selectively catalytic reduction systems.
Problems solved by technology
This patented technique involves reducing the amount of high sulfur content (HSC) pollution found on combustion turbine generators during their operations. By doing this, they are able to reduce emissions without having excessive amounts of fuel being burned or causing damage. Additionally, these techniques aim to recover some of the residual hydrocarbons present inside the system through condensation onto an internal surface layer called ash deposits that collects over time when there're no longer any further usage of the generator. Overall, these technologies help prevent environmental issues associated with degrading plant performance while minimizing thermal stress impact upon other components like sensors and actuating valve systems.
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0030] like figure 1 As shown, a zero-discharge system for desulfurization wastewater based on waste heat recovery under low-load conditions includes boiler 1, economizer 2, SCR denitrification equipment 3, air preheater 4, and electrostatic precipitator 5 connected in sequence through the flue And the desulfurization tower 6, also including the economizer flue gas bypass subsystem and the desulfurization wastewater evaporation subsystem;
[0031] Wherein, the economizer flue gas bypass subsystem includes an economizer bypass flue 17; the entrance of the economizer bypass flue 17 is connected to the
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The invention relates to a desulfurization wastewater zero discharging system and method based on waste heat reuse under a low-load working condition. The desulfurization wastewater zero discharging system comprises an economizer flue gas bypass subsystem and a desulfurization wastewater evaporation subsystem, wherein the economizer flue gas bypass subsystem comprises an economizer bypass flue, and can increase the flue gas temperature and the denitration efficiency under the low-load working condition; the desulfurization wastewater evaporation subsystem comprises a wastewater pipeline, a softening box, a concentration device, a wastewater preheater, a flue gas cooler, a heating medium water pump, a heating medium water pipeline, a wastewater pump and an atomization sprayer, and can perform concentration reduction, preheating and atomization on the wastewater to improve the evaporation efficiency of the wastewater. The invention further relates to a method for realizing zero discharging of the desulfurization wastewater under the low-load working condition by using the desulfurization wastewater zero discharging system based on the waste heat reuse. The system and the method havethe characteristics of a simple technological process, and can make effective use of waste heat of the flue gas to realize zero discharging of the wastewater under the low-load working condition of aunit and also improve the system denitration efficiency.
Description
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