Is chromium containing sludge flammable and explosive?

Chromium-containing sludge solid waste is a kind of hazardous waste with strong toxicity and carcinogenicity, which is mainly produced in chemical industry (chromium compound production), metallurgy (ferrochrome), light industry (electroplating, tanning, dyes, pigments) and other production processes.

Chromium-containing sludge disposal requirements.

Enterprises can dispose of facilities on their own, or they can entrust units with disposal qualifications and capabilities to dispose of them. The storage and disposal of chromium-containing hazardous wastes shall comply with the provisions of the "Pollution Control Standards for Hazardous Waste Storage", "Pollution Control Standards for Hazardous Waste Landfills", and "Pollution Control Standards for Hazardous Waste Incineration". If it needs to be transferred due to entrusted disposal, it shall be handled in accordance with the "Measures for the Management of Hazardous Waste Transfer Bills".

The importance of volume reduction in the dewatering of chromium-containing sludge cement slag.

In order to save trouble, many companies outsource the business of chromium-containing sludge cement slag, regardless of whether your contractor has relevant qualifications, as long as you can pull the sludge away, I don't care what to do with it, this consequence is very serious, the qualification and ability to spend money, and the violation of the law without qualification is to be sentenced!

The moisture content of sludge produced by chemical plants and industrial enterprises is mostly more than 90%, or even as high as 99%, and it is flowing. The sludge in this state is large in size, easy to diffuse pollution, difficult to transport and store, so it is necessary to reduce the moisture content of the sludge and reduce its volume. The moisture content of the sludge treated by the high-pressure sludge dryer can reach 15%-50%, and the sludge with a moisture content of 95% is treated to a moisture content of 40%, and the volume is reduced by 11 times, which can be seen.

If the moisture content of the mud cake is lower after sludge dewatering, that is, the higher the solid content and the smaller the volume, the more stable the sludge, the more flexible the subsequent disposal method will be, and the disposal cost will be reduced accordingly, because the cost is also determined by the sludge volume.

Chromium-containing wastes are managed as hazardous wastes Hazardous wastes refer to one or more hazardous characteristics such as corrosiveness, toxicity, flammability, reactivity and infectivity that are listed in the National Hazardous Waste List or identified according to the national hazardous waste identification standards and identification methods, as well as solid wastes with the above hazardous characteristics are not excluded. In metal surface treatment and heat treatment processes, such as bath liquid, tank residue and wastewater treatment sludge generated during nickel (chromium) plating with nickel (chromium) and electroplating chemicals.

Whether chromium-containing sludge is a hazardous waste depends on whether the chromium content in the sludge exceeds the standard. If it exceeds the standard, it is hazardous waste, and if it does not exceed the standard, it is not hazardous waste.

Hazardous waste: Definition: refers to one or more hazardous characteristics such as corrosiveness, toxicity, flammability, reactivity and infectivity that are listed in the national hazardous waste directory or identified according to the national hazardous waste identification standards and identification methods, as well as solid wastes with the above hazardous characteristics.

Identification procedure: According to the "Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste" and "Guidelines for the Identification of Solid Waste", judge whether the substance is solid waste, and if it does not belong to solid waste, it is not hazardous waste. If it is judged to be solid waste, it shall be judged according to the "National Hazardous Waste List".

Those listed in the "National Hazardous Waste List" belong to hazardous wastes. If it is not included in the "National Hazardous Waste List", it shall be identified as follows as follows. (Most of the time, I don't look at the "National Hazardous Waste List", but I will do an experiment to see if the limit is exceeded).

It is hazardous waste, containing heavy metals, you can check the hazardous waste list.

It is important to reduce the moisture content of the sludge so that the chromium-containing sludge is reduced. It can also be regarded as an effective treatment measure. At the same time, the hazardous waste will be handed over to the hazardous waste receiving unit with treatment capacity and qualification.

Answer: According to the relevant provisions of the Fire Protection Law of the People's Republic of China, "flammable and explosive dangerous goods" include civil ** articles and compressed gases and liquefied gases with combustion ** as the main characteristic in the national standard "List of Dangerous Goods" (GB12268 90); explosive liquids; flammable solids, spontaneously combustible materials and flammable materials when wet; oxidizing agents and organic peroxidants; Some flammable and explosive chemicals in poisons and corrosives. The specific name of the product is listed in the "Regulations of the People's Republic of China on the Administration of Civil Goods" and the "List of Chemical Dangerous Substances Fire Safety Supervision and Management" compiled by the Ministry of Public Security

1. **Items. Any substance that is subjected to external forces such as high heat, friction, impact or other factors, can have a violent chemical reaction in a very short time, release a large amount of gas and heat, and is accompanied by a huge sound. Such as detonators, explosives, firecracker charges, etc.

2. Flammable and flammable liquids. These substances are highly volatile and combustible. Such as gasoline, kerosene, methanol, alcohol and other solvents.

3. Flammable and combustible gases. These substances can burn or occur when heated, impacted, or sparked**, or have the ability to fuel and amplify fires. Such as hydrogen, oxygen, gas, acetylene, etc.

4. Spontaneously combustible items. Substances that do not require the action of an external fire source, and release heat due to the oxidation of the air, or the heat accumulation does not disperse due to the influence of the outside world, and reaches the spontaneous ignition point and causes spontaneous combustion, such as yellow phosphorus, oilcloth, oiled paper, etc.

5. Items that catch fire in case of water. This kind of substance can react violently with water, release combustible gas and heat, and can cause combustion and **. Such as sodium, potassium, sodium hydride, calcium carbide, magnesium aluminum powder, etc.

6. Flammable solids. These substances have a low ignition point and can cause rapid combustion when exposed to open flames, heat, impact or contact with oxidants. Such as red phosphorus, sulfur, glitter powder, raw rosin, etc.

7. Oxidant. This type of substance itself does not burn, but has a strong oxidizing ability, and contact with combustibles can cause combustion or **. Such as potassium permanganate, potassium perchlorate, sodium peroxide, hydrogen peroxide, etc.

Hello, you can refer to it!

Question: Is liquor a flammable or explosive substance?

Liquor itself is flammable, and during the production process, a large amount of volatile alcohol vapor is more likely to burn when it encounters an open flame. In particular, there are many staff in the filling workshop of liquor brewing enterprises, and if the safety measures are not in place and the safety awareness is weak, once there is a mistake in the production process, it will inevitably lead to a serious production safety accident.

The main danger of flammable gas is flammable and explosive, flammable gas within the range of combustion concentration, can catch fire or ** in case of ignition source, and some can even be ignited with only a very small amount of energy.

Extended information: All kinds of articles that are flammable, explosive, highly toxic, radioactive, corrosive and contradictory in nature must be classified and properly stored, strictly managed, well ventilated, and clearly marked. Use explosion-proof lamps in warehouses and flammable, explosive dust and gas places.

Flammable and explosive, chemicals must be kept by a special person, and the custodian should check the product name, specification, brand, quality, quantity in detail, and find out the dangerous nature. In case of poor packaging, quality abnormality, non-conforming labeling, etc., safety treatment should be carried out in a timely manner.

Flammable and explosive, chemicals must be kept by a special person, and the custodian should check the product name, specification, brand, quality, quantity in detail, and find out the dangerous nature. In case of poor packaging, quality abnormality, non-conforming labeling, etc., safety treatment should be carried out in a timely manner.

It depends on which category your factory's production process fits into the list. In the case of metal surface treatment and heat treatment processing, bath liquid, tank residue and wastewater treatment sludge resulting from black chromium plating using chromium and electroplating chemicals belong to HW17. If it is a metal surface.

Waste from tank residue, tank liquid and wastewater treatment sludge from anodizing with chromic acid and from roughening of plastic surfaces with chromic acid are classified as HW21.

HW17 hazardous wastes containing chromium should belong to HW17

Chloroform, silver mineralization, white phosphorus, certain alkanes, alkali metals, and many more.

Nitric acid is not flammable or explosive, but it is a hazardous chemical because it is extremely corrosive.

Nitric acid is not flammable and explosive, but it has strong oxidation and corrosiveness, and is easy to decompose into NO2, O2 and water when seen in light, which is a hazardous chemical and should be sealed and protected from light.

4Hno3 (light) = 4NO2 +O2 +2H2O