Welding fume is a kind of soot generated under high-temperature combustion during electric welding, when the electrode is in contact with the weldment. This kind of soot contains manganese dioxide, nitrogen oxides, fluoride, ozone, etc., floating in the air. Harm to the human body. People who inhale this kind of smoke can cause dizziness, headache, cough, chest tightness, shortness of breath, etc. In severe cases, it can lead to smoke poisoning or pneumoconiosis. Working in this smoke environment for a long time is more likely to cause cancer. Therefore, welding fume purification is one of the key topics in the environmental protection industry.
The importance of welding fume purification system to enterprises
Correct selection of industrial air purification equipment is an important decision for every enterprise. The health and safety of employees is at stake, and production profits depend on this choice.
Why are purification systems important to operators?
1. Improve the working environment;
2. Prevent the inhalation of harmful gases:
3. Promote the relationship between the two parties:
Why is the purification system very important to the enterprise?
1. Reduce the operator’s complaints about the working environment;
2. Reduce the loss (illness) caused by the operator to the company due to physical reasons;
3. Reduce losses caused by downtime;
4. Reduce the wear and tear of smoke and dust on machines and products;
5. Meet the requirements of relevant laws and regulations on environment and sanitation;
6. Improve corporate image and publicize corporate philosophy.
Welding fume purifiers discharge in an organized manner. Welding fume and dust removal equipment is equipment for purifying welding fume. After the welding fume is collected by the fume capture device, it is sent to the fume purifier through pipelines for purification and then discharged to the local environment. The fume capture methods of welding fume and dust removal equipment include suction arm capture method, top suction hood, and top suction plate.
Dust removal process: equipment produces flue gas → suction arm → hose → branch pipe → main pipe → filter cartridge dust collector → fire damper → exhaust fan → exhaust pipe → enter the atmosphere
For the treatment of welding fume, in addition to the air volume and purification efficiency of the main engine, the choice of dust collection hood is also very important. The collection forms of welding fume are usually as follows:
1. Suction arm type
For the welding conditions where the welding points are concentrated and the welding station is fixed, the universal suction arm type can be used. The suction arm swings in all directions and hovers at will. The position of the suction hood can be adjusted according to the position of the welding point, which can realize close-distance collection at the dust source point.
2. Environmental protection welding torch type
Set the dust suction port on the welding torch, and use the method of close-range high-pressure dust suction to suck away the smoke and dust.
3. Top suction hood
For the situation where the welding point is not fixed, the method of using the suction arm will have the situation that frequent movement of the suction hood is cumbersome and workers are unwilling to use it. To solve this problem, the method of top suction hood can be used, and it can be set according to the single-station welding area. The top vacuum hood realizes the effect of regional dust extraction and purification.
4. Welding room type
For working conditions such as automatic robot welding, a welding room is usually used to extract dust from the top.
5. telescopic room type
For the welding of large workpieces, the movement of the workpieces may require the use of crane traction, and the workshop is too small, so the welding area needs to be used for other purposes when there is no welding task. This kind of working condition can usually use telescopic room type dust extraction and purification.
telescopic room type
For the welding of large workpieces, the movement of the workpieces may require the use of crane traction, and the workshop is too small, so the welding area needs to be used for other purposes when there is no welding task. This kind of working condition can usually use telescopic room type dust extraction and purification.
6.the overall workshop self-circulation purification machine
For the welding of large workpieces, there may be situations where the welding workpiece has no fixed position and the welding position cannot be fixed. For such situations, the self-circulating purification integrated machine in the workshop can be used.
There are many ways to deal with welding fume. Ventilation and filter bag dust removal are all dust removal methods used in factories. However, the current effect is the best and the most economical one is the filter cartridge welding fume purifier. It is an upgraded version of the filter bag dust collector, which is very suitable for the purification of welding fume. The dust removal effect of the filter cartridge is obviously better than that of the filter bag, and the wear is also small, which can reduce the frequency of replacing the filter element and save money; in terms of price, this new type The filter cartridge dust collector is the same as the filter bag dust collector, and individual models are even cheaper, less investment, and economical.
As a dry dust filter device, the welding fume filter cartridge dust collector is very suitable for capturing fine, dry, non-fibrous dust. The filter cartridge of the welding smoke filter cartridge dust collector is made of textile filter cloth or non-woven felt, and the dust-containing gas is filtered by the filtering effect of the fiber fabric. When the dust-containing gas enters the welding smoke filter cartridge dust collector, the particles are large 3. The specific heavy dust will settle down due to the effect of gravity and fall into the ash hopper. When the gas containing fine dust passes through the filter material, the dust will be blocked and the gas will be purified.
The dust removal efficiency of the welding smoke filter cartridge dust collector is relatively high, generally above 99%, and its outlet gas dust concentration is within tens of mg/m3, which has a relatively high fine dust resolution. At the same time, the welding smoke filter cartridge dust collector can handle a wide range of air volume, the small one is only a few m3 per minute, and the large one can reach tens of thousands of m3 per minute. It can be used for flue gas dust removal in industrial furnaces and reduce the emission of air pollutants.
The structure of the welding smoke filter cartridge dust collector is mainly composed of upper box, middle box, lower box (ash hopper), ash cleaning system and ash discharge mechanism. The performance of the welding smoke filter cartridge dust collector is good or bad, in addition to the correct selection of filter bag materials, the dust removal system plays a decisive role in the welding smoke filter cartridge dust collector. For this reason, the cleaning method is one of the characteristics that distinguish the welding smoke filter cartridge dust collector, and it is also an important part of the operation of the welding smoke filter cartridge dust collector. The welding smoke filter cartridge dust collector has a simple structure and is easy to maintain and operate. Under the premise of ensuring the same high dust removal efficiency, the cost is lower than that of the electrostatic precipitator.
The filter element used in the pulse welding fume purifier is a special filter element for welding fume. It is a polytetrafluoroethylene (PTFE) polyester filter material. This filter material is a high-tech product. Its microporous structure can be mechanically pulled under special conditions. It can be stretched without changing its original characteristics in the slightest. The micropore size can be controlled at 0.2-0.3μm, and the filtration method belongs to surface filtration. The surface of the film is smooth and has excellent chemical stability, corrosion resistance, acid and alkali resistance, no aging and hydrophobicity. The soot trapped on the surface of the membrane is easy to peel off during filtration, and its air flow can be maintained at the same level for a long time.
Post time: 22-12-22
