First, we must ensure that the workplace meets the requirements of standards and specifications, and it is strictly forbidden to set it in illegal multi-storey houses, factories and residential areas with substandard safety spacing.
Second, the ventilation and dust removal system must be designed, installed, used and maintained according to the standard specifications, and the dust shall be detected and cleaned according to the regulations in each shift. During the shutdown of the dust removal system and when the dust exceeds the standard, it is forbidden to operate, stop production and evacuate people.
Third, we should use explosion-proof electrical equipment according to the specifications, implement lightning protection and anti-static measures, ensure the grounding of equipment and facilities, and prohibit all kinds of open flames and illegal use of working tools in the workplace.
Fourth, the generation, collection and storage of metal dust such as aluminum and magnesium must have waterproof and moisture-proof facilities, and it is strictly forbidden for dust to spontaneously ignite when wet.
Fifth, it is necessary to strictly implement the safety operation rules and labor protection system, and it is strictly forbidden for employees to fail to pass the training and not wear and use labor protection articles such as dustproof and antistatic according to regulations.
The relevant person in charge of the State Administration of Work Safety said that these five regulations are major measures for the construction of a safe production system. They are all lessons learned at the cost of blood, lifelines, responsibility lines and high-voltage lines, and we must be "iron-bound, fairly implemented, fully covered and truly implemented".
It's long overdue. Wuxi bodi will escort you!
2. How to strengthen dust explosion-proof safety management?
First, raise awareness and attach great importance to safety self-inspection. It is necessary to focus on the inspection of the high-concentration dust environment in the dust removal room, dust removal pipeline, settling room, dust removal and ventilation facilities area and workshop during maintenance, so as to ensure that no dead ends are left in the inspection and no future troubles are left in the rectification.
The second is to assess the explosion risk in key areas and implement safety technical measures. We should conscientiously implement various engineering and technical measures to prevent and control tobacco dust, write a risk assessment report and a hidden danger rectification plan to ensure the production safety of enterprises.
Third, strengthen occupational health management and reduce the occupational hazards of dust in tobacco industry. We should conscientiously promote special occupational health standards and standardized management of on-site occupational health, actively carry out workplace safety evaluation, and regularly organize occupational disease detection in dust places.
The fourth is to further increase publicity and professional knowledge training for employees. Managers and operators should be regularly organized to carry out safety knowledge and operation skills training including job responsibilities, operating procedures, dust explosion prevention and emergency measures. , after passing the examination, can mount guard.
3. Preventive measures for dust explosion
Original Publisher: Peng Liang Industry & Trade.
What is a dust explosion? What are the conditions that cause dust explosion? Dust can be seen everywhere in daily life or industrial production. The harm of dust is also enormous. Dust explosion energy is large, which can cause continuous explosion. There was no warning before the explosion, which was extremely harmful. Dust explosion accidents also occur from time to time in developed countries. Some enterprises that produce, use, store and transport combustible dust have collapsed and burned their factories due to dust explosion, resulting in huge economic losses. Conditions for dust explosion: 1. Combustible dust is suspended in the air at an appropriate concentration, forming a dust cloud that people often say. All solid substances in fine powder form are called dust. Dust that can burn and explode is called combustible dust; Dust floating in the air is called suspended dust; Dust falling on the solid wall is called deposited dust. 2. Sufficient air and oxidant; 3. There is a fire source or strong vibration and friction. There are many kinds of dust, which are explosive? Experiments show that the following seven kinds of dust have explosion hazards, including metal powder (aluminum powder, zinc powder, ferrosilicon powder, magnesium powder, iron powder and aluminum processing grinding powder), coal, grain (wheat, starch, sugar and milk powder), feed (blood powder and fish powder), agricultural and sideline products (cotton, tobacco and tea powder) and forest products (paper powder and milk powder). What measures are there to prevent dust explosion? First, reduce dust generation. Minimize dust generation and prevent suspended dust from reaching the minimum explosion concentration. This is the most basic preventive measure. Equipment should strive to have good sealing performance to prevent dust from flying and escaping; Install effective air suction and dust removal system, strengthen ventilation and dust removal, strengthen cleaning work, and remove dust from buildings such as walls and ceilings, mechanical equipment, lighting lamps, etc. Water has many effects on dust explosion, so water can be used to control dust flying. Ways to reduce dust concentration in different industries are: such as coal.
4. Interpretation of five provisions on dust explosion prevention in enterprises
20 14, 14 On August 5th, the Five Provisions on Preventing Dust Explosion in Enterprises was issued in the form of state administration of work safety Order.
In order to draw lessons from the "8.2" explosion accident of Jiangsu Kunshan Zhongrong Metal Products Co., Ltd., on the basis of in-depth analysis of similar accidents in recent years, and according to the "Safety Regulations for Dust Explosion" and other relevant standards and norms, the State Administration of Work Safety formulated the "Five Provisions for Preventing Enterprise Dust Explosion".
This is another important measure for the construction of safety production system after Seven Provisions for Mine Managers to Ensure the Safety of Miners, Ten Provisions for Chemical (Dangerous Chemicals) Enterprises to Ensure Production Safety, Ten Provisions for Fireworks and Firecrackers Enterprises to Ensure Production Safety, and Ten Provisions for Non-coal Mine Enterprises to Ensure Production Safety.
All the five provisions are lifelines, responsibility lines and high-voltage lines, and all of them are lessons learned at the cost of blood. We must ensure that the regulations are ironclad, only implemented, fully covered and truly implemented.
5. How to prevent and avoid dust explosion?
Dust explosion means that when the dust meets a heat source (open flame or temperature) within the explosion limit, the flame instantly spreads to the whole mixed dust space, the chemical reaction speed is extremely fast, and a lot of heat is released at the same time, resulting in high temperature and great pressure. The energy of the system is converted into mechanical energy and radiation of light and heat, which has strong destructive power.
In the past two years, accidents caused by dust explosions have been reported frequently.
For example:
2065438+Dust explosion in Taiwan Province Province on June 28th, 2005.
20 14 dust explosion in kunshan on August 2nd.
April 20 14 Nantong dust explosion.
And the recent "4.29 Shenzhen dust explosion"
Every accident not only caused huge economic losses to enterprises, but also caused a heavy burden to injured families and social responsibilities.
Therefore, in order to prevent the disaster from happening again, we should take precautions first. And choose reliable products with high safety factor, including accessories, such as "Xiechang Environmental Protection" professional field for more than 20 years, and has been the leader of bag dust removal and explosion protection.
6. What problems should be paid attention to when formulating dust explosion-proof scheme?
1. Considering whether the equipment is outdoors or not, and there are no dense pipelines and equipment around, it is relatively safe, economical and efficient to discharge by blasting plates.
2. Whether direct explosion venting is acceptable. If flameless emission is adopted, pressure, high temperature and smoke may be generated. Are these by-products acceptable?
4. Flame-proof: The burning substances produced in the initial stage of explosion may pass through any open conveying connection (conduit, pipeline, trough, conveyor), so that the connected equipment and facilities are in danger of secondary explosion. The second explosion usually causes the most damage. No matter what protective measures are taken against the explosion, it is necessary to prevent the explosion from spreading to other parts of the factory.
5. Material characteristics: explosion-proof plate, flameless ventilation, etc. Only applicable to dust below Kst200. If it is a high-tech enterprise, it is not clear about the types and characteristics of dust, so it is recommended to do dust detection and risk assessment.
6. Do you need immediate action? At this time, the active explosion-proof system is considered, which has fast reaction speed and good explosion-proof effect.
Wait a minute.
The following three basic protection systems are used for dust explosion prevention: explosion relief system, explosion-proof system and explosion suppression system. Taking the dust collector as an example, the following flow chart shows how technicians can choose a more suitable explosion-proof system flow according to your equipment, dust characteristics, gas and steam characteristics, process and operation properties, laws and regulations, economy and so on. To help you choose a better explosion-proof solution.
7. What is a dust explosion?
definition
Dust explosion means that when the dust meets a heat source (open flame or temperature) within the explosion limit, the flame instantly spreads to the whole mixed dust space, the chemical reaction speed is extremely fast, and a lot of heat is released at the same time, resulting in high temperature and great pressure. The energy of the system is converted into mechanical work and radiation of light and heat, which has strong destructive power.
Explosive dust Explosive dust includes: metals (such as magnesium powder and aluminum powder); Coal; Cereals (such as wheat and starch); Feed (such as blood meal and fish meal); Agricultural and sideline products (such as cotton and tobacco); Forest products (such as paper powder and wood powder); Synthetic materials (such as plastics and dyes).
Generally, dust that is not easy to cause explosion includes soil, sand, iron oxide, abrasive materials, cement, timely dust and similar dust after combustion. The dust chemical properties of this kind of substance are relatively stable and not easy to burn. However, if this kind of dust is produced in oil mist and combustible gases such as CO, CH4 and coal gas, it is also prone to explosion.
prevent
If comprehensive dust suppression measures such as effective ventilation and biological nano-film dust suppression technology are adopted, smoking and open flame operation are strictly prohibited. Set pressure relief valve or other devices in the equipment shell, and adopt explosion-proof system. Workshops with the risk of dust explosion must be designed in strict accordance with the explosion-proof technical level, and a separate ventilation and dust removal system should be set up. Always wet wash the workshop floor and equipment to prevent dust from flying and gathering. Ensure that the system is well sealed. When necessary, the combustible dust in the closed container or pipeline shall be filled with gases such as nitrogen and carbon dioxide, so as to reduce the oxygen content and inhibit the dust explosion.