The conditions for the cleaning of the pulse dust collector, can nitrogen be used as the pulse clean

The bag filter is now the most widely used dust collector, the following is the working principle of the bag dust collector after the dust gas enters the ash hopper from the tuyere, a part of the coarser dust particles and condensed dust clusters, due to the inertia of the direct fall, play the role of pre-dust collection. The air flow into the hopper turns upwards into the box, and as it passes through the filter bag with a metal skeleton inside, the dust is trapped on the outer surface of the filter bag. The purified gas enters the clean chamber at the upper part of the filter bag and is collected and discharged into the air outlet duct.

Cleaning instructions for pulse dust collectors:

With the extension of the filtration time, the dust layer on the filter bag continues to accumulate, and the resistance of the dust removal equipment continues to rise, and when the resistance of the equipment rises to the set value, the ash cleaning device begins to clean the ash.

A chamber poppet valve is closed, the filter air flow is cut off, and then the electromagnetic pulse valve is opened, and the compressed air expands rapidly in the upper box in a very short time, pouring into the filter bag, causing the filter bag to expand and deform and produce vibration, and under the action of reverse air flow, the dust attached to the outer surface of the filter bag is peeled off and falls into the ash hopper.

After the pulse dust collector is cleaned, the solenoid pulse valve is closed, the poppet valve is opened, and the chamber is back to filtration. Cleaning each chamber is carried out sequentially, from the first chamber cleaning to the next cleaning cycle for a cleaning cycle. The dust that is trapped after the filtration and ash cleaning work falls into the ash hopper, and then is discharged by the ash unloading device at the ash hopper mouth.

Pulse dust collector.

Summary. Nitrogen is a elemental substance formed by nitrogen, with the chemical formula N. It is a colorless and odorless inert gas at room temperature and pressure, which can only react with hydrogen to form ammonia under high temperature, high pressure and catalyst conditions.

Yes. Blast furnace gas is flammable and explosive gas, mainly containing CO, if the bag pulse dust collector is sprayed with compressed air to remove dust, the CO and O2 in the injection gas are mixed to reach a certain proportion in case of open flame. N2 and CO will not occur even if they are exposed to open flames**, which is very safe, and industrial nitrogen** is not very expensive, and it is easy to obtain for industrial use.

Nitrogen is a elemental substance formed by nitrogen, with the chemical formula N. It is a colorless and odorless inert gas at room temperature and pressure, which can only react with hydrogen to form ammonia under high temperature, high pressure and catalyst conditions.

1. The principle is different.

When the dust-containing gas enters the dust collector from the air inlet, it first touches the inclined plate and baffle plate in the middle of the air inlet and outlet, and the air flow turns to flow into the ash hopper, and the air flow speed slows down at the same time, and the coarse particle dust in the gas directly flows into the ash hopper due to the inertia.

The purification mechanism of the reverse air dust collector is to use the boiler induced draft fan to form the negative pressure of the dust collector system, and the flue gas flows negatively. The filter bag dust collector has the functions of inertial collision, screening (contact retention), interception, aggregation and static electricity, and can effectively capture the smoke and suspended fine dust of coarse (10 m particle size) and fine (<5 m particle size is the most harmful to the human body) particles, which is its outstanding advantage.

2. The advantages are different.

The pulse dust collector adopts the sub-chamber air stop pulse injection ash cleaning technology, which overcomes the shortcomings of the conventional pulse dust collector and the sub-chamber back-blowing dust collector, with strong ash cleaning ability, high dust removal efficiency, low emission concentration, small air leakage rate, less energy consumption, less steel consumption, less floor space, stable and reliable operation, and good economic benefits.

The reverse air dust collector can effectively capture the smoke and suspended dust that are harmful to the human body with a particle size of 10 m and <5 m, which plays a special role in purifying the atmospheric environment and protecting human health. The pollution is fundamentally controlled, and the concentration of smoke and dust emission after purification is significantly lower than the national standard.

In view of the influence of the pulse cleaning cycle and the pulse valve injection action sequence on the dust collector, the pulse bag filter readjusted the cleaning cycle and the pulse valve injection action sequence, and the cleaning time interval of each chamber of the dust collector was 56s, and it took nmin for several bag chambers of the dust collector to carry out a complete ash cleaning, and the time interval to the start of the next cycle was 3min, and the cleaning time was shortened, so that the dust attached to the filter bag was shaken off in time, which not only improved the working condition of the dust collector. It is also conducive to the improvement of the working condition of the whole dust removal system and the adjustment of the action position of the valve plate can be realized by adjusting the poppet valve. The solenoid cylinder is a buffer type, which requires that when the valve plate is closed and reaches the closed position, the cylinder should enter the slow area, otherwise the nuts on both sides of the throttle valve plate should be adjusted. The movement speed of the cylinder can be adjusted by the throttle bolts at both ends of the cylinder, and the closing time of the poppet valve is not more than 2s, preferably within 1s, and the opening time can be adjusted slower.

By adjusting the pressure reducing valve on the triplet to ensure the pressure of the compressed air of the cylinder, and at the same time, in order to reduce the deformation of the valve plate and increase the tightness between the valve plate and the air outlet, the rubber material for sealing should be made of temperature-resistant material to prevent the rubber from aging and stabilizing at high temperature.

1. The cleaning cycle and frequency of the pulse bag filter directly affect the service life of the dust collector bag.

2. When adjusting the ash cleaning cycle, it is necessary to consider comprehensively, such as common lime powder, in the case of large dust concentration. The interval of the pulse valve should be appropriately fast, generally about 30s, and the weekly interval should be about 5min. The interval between dusts with high adsorption is slightly shorter.

The adjustment of the interval time of the pulse valve should be determined according to the specific conditions of the site and the characteristics of the dust.

3. Then the resistance of the bag filter is measured by the instrument, and when the resistance of the dust collector reaches the set value of the instrument, the pulse valve will automatically clean the ash. This method is mostly used in dust collectors with relatively large filtration areas, or dust collectors with special requirements. It is easy to use and simple to operate, but due to the high cost, the small bag filter is not easy to use.

The interval between the two cleaning of the pulse bag filter is called the cleaning cycle, and it is generally expected that the cleaning cycle will be as long as possible, so that the stand-alone dust collector can operate under economic resistance conditions. Therefore, it is necessary to carefully study the dust properties, dust concentration, etc., and choose the ash cleaning cycle and time interval according to different ash cleaning methods, and adjust the dispensing to achieve the best ash cleaning parameters in the test run of the bag dust collector. If the ash cleaning time is too short, and the dust on the dust removal filter bag has not been cleared, the filtration operation will be resumed, which will make the resistance recover quickly and gradually increase, and finally affect its application effect, pay attention to whether the bag room condensation is there, and whether the ash discharge system is unblocked.

Prevent clogging and corrosion, and when the dust accumulation is serious, it will affect the production of the main engine. This work is the primary factor that affects the performance and operation of the dust.