What is the method of laboratory ironmaking tail gas treatment and why

1) Put a certain amount of water into the device A, B, and C, so that the long catheter is immersed below the water surface, close K2 and K4, open K1 and K3, and connect the syringe at the mouth of the rightmost catheter When the syringe piston is slowly pulled outward, if air bubbles are observed at the middle and long catheter nozzles of A, B, and C, it means that the whole device has good air tightness Therefore, fill in: A, B, and C have air bubbles at the middle and long catheter orifice. (2) Carbon dioxide and carbon monoxide cannot react with concentrated sulfuric acid. Therefore, concentrated sulfuric acid can be used to dry carbon dioxide and carbon monoxide, and the reagent x contained in C is concentrated sulfuric acid Therefore, fill in: concentrated sulfuric acid (3) Close k2, k4, open k3, k1, carbon monoxide gas can be separated Therefore, fill:

Turn off k2 and k4, turn on k3 and k1; CO close K1, K3, open K4, K2, and then close K2, carbon dioxide gas can be separated Therefore, fill in: turn off K1, K3, open K4, K2, and then turn off K2; The reactions that occur in CO2 (4)a are: carbon dioxide can react with sodium hydroxide to form sodium carbonate and water, and sodium carbonate can react with dilute sulfuric acid to form sodium sulfate, water and carbon dioxide, and the chemical equations are:

CO2+2NaOH Na2CO3+H2O, Na2CO3+H2SO4 NA2SO4+H2O+CO2 Fill in: CO2+2NaOH NA2CO3+H2O, Na2CO3+H2SO4 NA2SO4+H2O+CO2

An alcohol lamp is placed at the end of the catheter to ignite the exhaust gases. The principle of ironmaking is to reduce Fe with C, then CO will be generated, and CO2 will be formed by ignition, and the toxicity will be relieved.

Place a poor alcohol lamp at the end of the catheter.

It is used to ignite exhaust gases. The principle of iron smelting is to reduce Fe with C, then CO will be generated, and CO2 will be generated by ignition, and the toxicity will be relieved.

If you light the alcohol lamp for exhaust treatment first.

Because the CO is impure at the beginning, it is possible to **.

So you can't light the alcohol lamp first.

Although CO can cause pollution, the reaction is carried out in the fume hood, and the pollution is very small.

Carbon monoxide is toxic, but when ignited, it produces CO2, which is non-toxic.

The main treatment technologies of waste gas in steelmaking plants are:

Wet processing. Wet processing methods include the I-C method (open hood) in France, the KPUPP method (double hood) in Germany, and the OG method (single hood) in Japan. Among them, the OG method is the most widely used converter flue gas treatment method in the world due to its advanced technology and safe and reliable operation. The OG method first conducts sensible heat on the converter gas, cools the flue gas to 380 with a cooling tower, and then cleans and cools it to 42 with wet dust removal and then uses a PA venturi scrubber for secondary dust removal.

The total dust removal efficiency of this method is up to

Dry processing. This method uses a high-pressure electrostatic precipitator to purify the dust in the converter gas. The iron from the flue gas** can be used as a raw material in the sintering plant.

In addition to the gaseous oxides containing sulfur, carbon, nitrogen and other elements, there are also various solid oxides of the main metal and its associated elements to be extracted, as well as sulfides and sulfates of these metals, in addition to iron oxides and various gangue dusts. They will reduce the rate of metal ** and resource utilization, and more seriously, the particulate pollutants of flue gas and the toxic elements and compounds in them will cause environmental pollution and endanger human health.

Iron and steel production mainly includes sintering, pelletizing, coking, ironmaking, steelmaking, steel rolling, forging, ferroalloys, refractories, power and other links, and steel mills have various furnaces that emit a lot of smoke and exhaust gases. Efforts to reduce energy consumption and raw material consumption are one of the fundamental ways to reduce exhaust emissions; Reform the process, adopt advanced technology and equipment to reduce the emission of waste gas from the production process; Actively adopt high-efficiency and energy-saving treatment methods and equipment to strengthen the treatment of waste gas; Vigorously carry out comprehensive utilization.

The current process of ironmaking is mainly blast furnace production, and one of the by-products of blast furnace is coal gas.

The composition of blast furnace gas is generally four, N2, CO2, CO, H2

Of these, N2 is about 50%.

CO2 is about 30%.

CO 20% or so.

h2 is about 2%.

Blast furnace gas generally does not need to separate CO can be used directly, only dust removal is required!

Desulfurization, dust removal, etc.

It's all about the process, and in general, that's there"Technical confidentiality"Yes, I did a job in the United States, and people asked me to do this job, but they didn't tell the process, and it was funny!

It is used to supply residents for gas. It's called piped gas.

Micro explanations? The principle is to use the flammability of carbon monoxide to produce non-toxic carbon dioxide after combustion. If I had to explain it at the micro level, it would be as follows:

Carbon monoxide and oxygen molecules are broken into carbon atoms and oxygen atoms, and each carbon atom and two oxygen atoms combine to form a carbon dioxide molecule! I don't know if it's suitable!

Carbon monoxide and carbon dioxide molecules have different atom numbers and atomic arrangements, so their properties are different, carbon monoxide is toxic and will pollute the environment, carbon dioxide is non-toxic and will not pollute the environment.

How do you explain this? co+o2=co2。。and conversion into carbon dioxide molecules. It does not pollute the air.

Tail gas is produced in the ironmaking process, the main components are: CO, CO2, N2, H2, CH4, etc., of which the combustible component CO content accounts for about 25%, the content of H2 and CH4 is very small, and the content of CO2 and N2 accounts for % respectively Usually called blast furnace gas, it is a gaseous fuel, which can be used for the self-use gas of metallurgical enterprises, such as heating hot-rolled steel ingots, preheating steel ladles, etc. It can also be supplied to civilian use, and if coke oven gas is added, it is called"Mix gas", which increases the calorific value.

However, due to the high temperature and large dust content, it must be cooled and dusted before it can be used.

25 ∴a≈1×10－

3 (1+1+1 points).

1 point for correct expressions for k, 1 point for correct calculations, and 1 point for correct calculations).

2— ；If the iron element rises from 0 valence to +6 valence, and the total number of increases is 6, it loses 6 electrons, then Fe-6E-FeO4

2— ；Because iron can react directly with acid, acid can not be selected as the electrolyte solution, nor can the left and right charges be conserved with hydrogen ions, only the alkali can be selected as the electrolyte solution, but not KOH, otherwise impurities such as potassium ions are introduced, and according to the conservation of charge, then Fe-6E-+8OH FeO4

2— ；According to the conservation of the number of hydrogen and oxygen atoms, the anode reaction formula is Fe 6e +8OH = FeO42

Mainly sulphur dioxide, but also a small amount of nitrogenous gas.

Sulfur is present in the ore, so it can be continuously oxidized by the air during the calcination of the ore, eventually forming sulfur dioxide.

There is also a large amount of nitrogen in the earth's crust, so there must be compounds mixed with nitrogen in the ore, and the valence state of nitrogen is more complex, and a variety of nitrogen oxides can be formed.

A sulfuric acid solution can react with ammonia, so the sulfuric acid solution is used to absorb the synthetic ammonia industrial tail gas (mainly blind to the divine component ammonia), so A is wrong;

B CO is flammable, so CO in ironmaking blast furnace gas can be used as fuel loss, so B is correct;

c Caustic soda solution can be combined with NO2

and NO, so the caustic soda solution is used to absorb the nitric acid industrial exhaust gas, so C is correct;

d SO2 can react with ammonia, so it is correct to use ammonia to absorb SO2 in sulfuric acid industrial exhaust; Therefore, a