Eco-Zone Quiz with Prizes, Issue 8 (9.15-9.18)
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This post was last edited by yzhang2010 on 2011-9-19 10:06. Eighth Edition of the Environmental Protection Area Quiz Competition: 1. The main ways in which car engines produce NOx are: ( ) A. Instantaneous type B. Thermal type C. Fuel. 2. What are the main pollutants emitted by cars? 3. How are the by-products resulting from flue gas desulfurization handled after the desulfurization process is completed? What are the existing solutions? Answering rules: 1. Please hide the answer in your response; editing after posting is invalid! Everything that is not hidden will be deleted. For detailed information on the hiding method, see the post at http://bbs.hcbbs.com/thread-492556-1-1.html. 2. The rules for the event and the scoring criteria can be found in the post at http://bbs.hcbbs.com/thread-880747-1-1.html. 3. When scoring, moderators should not score the same reply multiple times. Answer key: 1. B, 2. CO, HC, NOx, along with small amounts of lead, sulfur, and phosphorus, 3. Open-ended answer
1. B 2. Carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOX), sulfur dioxide (SO2) 3. Limestone or lime washes react with SO2 in the flue gas; the resulting calcium sulfate precipitates in the wash solution, and after separation it can be discarded or recovered in the form of gypsum. The ammonia washing method can achieve a very high desulfurization efficiency, and the by-products, sulfuric acid AN and AO acid AN, are marketable fertilizers.
1C 2 Carbon monoxide, carbon dioxide 3. Limestone desulfurization
1.C 2. Carbon monoxide, hydrocarbons, nitrogen oxides, sulfur dioxide, particulate matter, lead, etc. 3.
Reply 1# huankeliukai 1. A 2. The main pollutants emitted by vehicles include carbon monoxide, hydrocarbons, nitrogen oxides, sulfur dioxide, particulate matter, lead, etc. 3. Based on whether the desulfurization products are recovered, flue gas desulfurization can be divided into the disposal method and the regeneration and recovery method; in the former, the desulfurization mixture is discharged directly, while in the latter, the desulfurization by-products are recovered in the form of sulfuric acid or sulfur. Based on the dry and wet form of the desulfurization products, flue gas desulfurization can be further divided into wet, semi-dry, and dry processes.
1. A, B (high temperature and instantaneous)； 2. Car exhaust contains hundreds of different substances. Among the harmful ones, in addition to the well-known carbon monoxide (CO) and sulfur dioxide (SO2), those that are currently drawing particular attention include carbon dioxide (CO2) and methane (CH4), which contribute to the greenhouse effect ； Substances such as nitrogen oxides (NOx) and unburned hydrocarbons (HC) that cause photochemical smog, as well as polycyclic aromatic hydrocarbons (PAN) which are carcinogenic and attach to soot particles. 3. There are an estimated over 200 types of flue gas desulfurization technologies under research, development, and commercial use around the world. Based on whether the desulfurization products are recovered, flue gas desulfurization can be divided into the disposal method and the regeneration and recovery method; in the former, the desulfurization mixture is discharged directly, while in the latter, the desulfurization by-products are recovered in forms such as sulfuric acid or sulfur. Based on the dry and wet form of the desulfurization products, flue gas desulfurization can be further divided into wet, semi-dry, and dry processes. China’s power sector began research on flue gas desulfurization in power plants in the 1970s, carrying out semi-industrial tests or on-site pilot studies such as the sodium hydrosulfite cycle method (W-L method), iodine-containing activated carbon adsorption method, and limestone-gypsum method. Since the 1980s, the power industry has carried out some large-scale research and development work on flue gas desulfurization. At the same time, in recent years, our country has also increased its efforts to introduce flue gas desulfurization technologies.
1.B 2.NOx, CO2, CO, sulfides 3. Generally, gypsum desulfurization is carried out at the flue gas outlet
1/A 2. Carbon monoxide, hydrocarbons, nitrogen oxides. 3. Used to produce gypsum, which is employed in manufacturing building materials, as an additive in cement, as waste material, for improving saline-alkali soil, and as material for roadbed filling.............
1. The main ways by which car engines produce NOx are: (C) A. Instantaneous type B. Thermal type C. Fuel. 2. What are the main pollutants emitted by cars? They include carbon monoxide, hydrocarbons, nitrogen oxides, sulfur dioxide, particulate matter, lead, etc. 3. After flue gas desulfurization is completed, how should the raw desulfurization by-products be handled? What are the existing treatment methods? After flue gas desulfurization, the by-products resulting from this process can be either discarded or recycled ； The treatment methods include wet, semi-dry, and dry processes.
Reply 1# huankeliukai 1. C 2. Carbon monoxide, hydrocarbons, nitrogen oxides, sulfur dioxide, particulate matter, lead, etc. 3. Discharge directly into wastewater ； Made into magnesium sulfate ； It is converted into magnesium sulfite, which is then used after calcination.
This post was last edited and replied to by yzhang2010 on 2011-9-15 09:48. Reply 1# huankeliukai: 1. The main ways by which car engines produce NOx are: Answer: C. A. Instantaneous type; B. Thermal type; C. Fuel. 2. What are the main pollutants emitted by cars? Answer: Exhaust gases. Including carbon dioxide, carbon monoxide, hydrogen sulfide, nitric oxide, etc. 3. After flue gas desulfurization is completed, how should the raw desulfurization by-products be handled? What are the existing treatment methods? Answer: Recycling. Production of sulfuric acid AN, production of sulfur, etc.