1、 Construction mechanism of ZC-II/III mechanical rotary back blowing flat bag dust collector:

When inspecting the upper clean room of the dust collector, it should be turned off, the power should be cut off, safety should be taken into account, and two people should operate at the same time to prevent starting the fan, closing the inlet door, or rotating the arm, which may cause injury or death accidents.

2. Regular attention should be paid to whether dust is discharged from the exhaust duct. If dust is found, the cause should be promptly investigated and eliminated.

3. Dust collectors working outdoors should be regularly repainted to prevent rusting.

4. Regularly park and inspect each filter bag. If any damage is found, replace the filter bag in a timely manner.

5. The anti blowing automatic control system should be regularly inspected to prevent malfunctions.

6. The accumulated ash in the ash hopper should be cleaned regularly and not too much.

7. Regularly check whether the anti blowing rotary arm rotates normally.

8. All transmission components should be regularly oiled.

2、 Maintenance and repair of ZC-II/III mechanical rotary back blowing flat bag dust collector:

After installation, lubricating oil should be added to each transmission part, and then a test run should be conducted to check if the reducer is reversing. If it is reversing, it should be immediately rewired to avoid damaging the parts. If it is confirmed to be correct, it can be officially started.

After the top cover is closed, it should be tested for flexible rotation first. The joint between the top cover and the cleaning outdoor ring should be sealed with rubber to ensure the sealing performance when the top cover is closed.

3. Cover the filter bag frame with a filter bag (fluff facing inward), and secure the bag opening and guide with a pressure strip to prevent air leakage. Then carefully insert the filter bag into the flower board (be careful not to scratch or scratch the filter bag), and insert the tail cone into the corresponding positioning ring of the lower bracket. Place a rubber ring under the upper guide frame and press it down with a pressure plate.

When installing the anti blowing rotary arm transmission mechanism, attention should be paid to being vertical up and down, and the rotation plane of the rotary arm should be parallel to the upper plane of the frame guide and maintain a distance of 2-4mm. The rotation should be flexible, the air outlet flipping device should be in the appropriate position with the collision head, and the flipping should be correct and flexible.

5. The trapezoidal hole of the flower board should be perpendicular to the corresponding positioning ring on the lower bracket to prevent the upper opening from tilting and leaking after placing the filter bag frame.

6. The sealing filler should be embedded between the flower board and the bracket, and between the bracket and the support ring. Then, the bolts should be tightened and adjusted to ensure that the flower board plane is parallel to the anti blowing air outlet of the rotating arm and maintains a distance of 62mm.

7. Rubber strips should be installed at each entrance door, explosion-proof door, observation hole, etc. to ensure their sealing.

8. Sealing fillers should be embedded between the flanges of the ash hopper filter chamber cylinder, clean room, etc. before tightening the bolts to prevent air leakage.

3、 Installation and commissioning of ZC-II/III mechanical rotary back blowing flat bag dust collector equipment:

The main parameters of the twelve specifications are detailed in Appendix 1, and their main dimensions are detailed in Appendix 2.

Filter area: 40-1150 square meters, a total of twelve types.

Bag length: 2.0-6.0, a total of five types

Number of bags: There are four types of bags ranging from 24 to 240, and the number of bags in each circle is determined based on a modulus of 24.

Number of turns: 1-4 turns

This series proposes twelve specifications

Series specification description

The first item: 570 is the nominal filtration area (m2).

Second item: According to the form of the air outlet connection, it is divided into two types: flat outlet and lower outlet. P represents flat outlet and X represents lower outlet.

The third item: According to the direction of airflow rotation at the inlet, it is divided into two types: S and N. S represents clockwise rotation of the inlet, and N represents counterclockwise rotation of the inlet.

The fourth item: According to the different filtering wind speeds V, it is divided into two levels: A and B. A represents low-end load, and B represents high-end load.

Item 5: 5 refers to the bag length (in meters)

The sixth item: II - refers to the design number.

The seventh item: ZC refers to the Chinese Pinyin prefix for "turn" and "blow" in reverse rotation.

Item 8: 144 is the number of filter bags (only)

Model representation: Column 144ZC-II-5 BNP570 rotary back blowing flat bag dust collector.

4、 ZC-II/III type mechanical rotary back blowing flat bag dust collector model representation series:

For intermittent work scenarios, a U-shaped pressure gauge with a 0-300mm indication can also be used, with manual control of blowback operation or timed control.

The self-control device is a "ZC-DKB" type electric control screen, please refer to the specialized manual for details.

The XLED (BLED) type reducer adopts a fixed resistance control method, which uses the resistance of the dust collector as a signal to control the automatic opening and closing of the anti blowing mechanism. The pressure tapping tube is installed on the inlet and outlet of the dust collector.

1. Anti blowing automatic control scheme:

The bottom of the ash hopper adopts a star valve, and the dust collector with one or two filter bags is equipped with a Φ 300YJD-B discharge device. Equip the dust collector with three or four circles of filter bags with a Φ 400YJD-B discharge device.

2. Ash unloading device:

The rotation speed of the arm should be strictly selected according to the parameters in the table. It is recommended to use XLED or BLED planetary cycloidal pinwheel reducers. Other reduction devices can also be used according to the local product supply situation, provided that the required output shaft speed and torque are met.

3. Rotary arm transmission mechanism:

The actual operating parameters of the anti blowing machine are closely related to the filtering conditions. During operation and debugging, the anti blowing pipeline valve should be adjusted to ensure that the anti blowing power can blow off the dust accumulation on the filter bag without being too strong, so as not to affect the service life of the filter bag.

From the perspective of operational reliability, it is recommended to use a cyclic anti blowing method, and based on this, the anti blowing machine is selected as listed in Appendix 1. Install a closed inclined plug valve made according to the HVAC International T305 diagram on the inlet pipeline of the anti blowing machine. If atmospheric anti blowing method is used, the selected anti blowing machine will have a slight surplus. At this time, a DDZ-I electric regulating valve should be installed at its inlet, interlocked with the anti blowing machine to overcome air leakage factors.

If circulating air is used for back blowing, that is, the suction port of the back blowing machine is connected to the clean room. At this time, the back blowing system forms its own circuit, eliminating the risk of air leakage and condensation. However, the negative pressure in the clean room cannot be utilized, and the selected fan pressure is the actual pressure head required for back blowing.

If atmospheric wind reverse blowing is used, that is, the suction port of the reverse blower is connected to the atmosphere. At this time, the negative pressure in the clean room is also the pressure head of the counter blowing effect, but the counter blowing volume becomes a leakage factor in the system, reducing the effective suction air volume and easily causing condensation under high temperature conditions.

The parameters of the anti blowing machine are related to the connection of the anti blowing pipeline.

4 anti hair dryers:

5、 Selection Instructions for ZC-II/III Mechanical Rotary Backblowing Flat Bag Dust Collector Accessories:

When used in explosive gas environments, the box and top cover of the dust collector should be equipped with flip type explosion-proof doors, and diagonal pin fasteners must be added between the top cover and the clean room. The selection should be explained.

1. Explosion proof measures:

The normal service life is not less than 1 year.

2. Filter bag lifespan:

The filter bag material is made of "208" industrial polyester velvet. When designing and selecting based on its thermal performance (temperature resistance of 150 ℃), it is recommended to ensure that the inlet temperature of stable high-temperature flue gas does not exceed 120 ℃, and for unstable high-temperature flue gas that occasionally occurs (usually not exceeding 5 minutes); Under the condition of dust on the filter bag, the inlet temperature is allowed to be relaxed to 150 ℃.

3. Inlet temperature:

The emission concentration of coal dust and ultra-fine metal oxide dust cooled to 120 ℃ in electric furnaces is much lower than the national emission standards. Therefore, this dust collector is fully capable of meeting the purification requirements for ultra-fine dust.

Productive measured data

4. Filtration efficiency:

For high-end operating conditions, choose a working resistance of 110-160 millimeters of water column.

For low-end operating conditions, choose a working resistance of 80-130 millimeters of water column.

The no-load operating resistance under normal temperature conditions is 30-40 millimeters of water column, and the control range of load operating resistance should be adapted to the selected filtering wind speed.

5. Work resistance:

For filtering dusty gases at room temperature (t ≤ 80 ℃), low concentration, and coarse particles, it is recommended to operate at a high load, using a filtration wind speed of V=2.0-2.5 meters/minute and selecting B-type specifications.

For high filtration temperature (80

6. Selection of filtering wind speed:

V filtration wind speed (m/min)

In the formula: L is the filtered air volume through the dust collector (cubic meters per hour), F=L/60V (square meters)

7. The required filtration area for the rotary back blowing flat bag dust collector is calculated according to the following formula:

6、 Performance and Selection Instructions for ZC-II/III Mechanical Rotary Backblowing Flat Bag Dust Collector:

1. Except in extremely cold regions, this dust collector can be installed outdoors without the need to build a dust collector room.

After several designs, the inlet concentration of this device does not need to be limited to 15 grams/m3. Even if it is 150 grams/m3, there is no need to add a cyclone dust collector. This device has the function of a cyclone dust collector, but there is no resistance from the cyclone dust collector. Although this device increases the cost, the selling price will not increase.

3. The upper cover of this device is divided into multiple pieces and can be opened freely, making bag replacement and maintenance very convenient.

4. Using the resistance of the dust collector as a signal, it can automatically control the rotation back blowing to clean the dust, and adjust the cleaning cycle automatically depending on the inlet concentration.

5. The ladder shaped flat bags are arranged inside the cylindrical body, with a simple and compact structure, and the filtration area refers to the elevation. Under the action of counter blowing, the trapezoidal flat bag has a large amplitude, and only one vibration is needed to shake off the accumulated dust, which is beneficial for improving the service life of the filter bag.

6. The high-pressure fan equipped with the equipment is used for reverse blowing dust cleaning, which is not limited by the air source conditions of the usage site, has fewer vulnerable parts, is easy to maintain, operates reliably, overcomes the disadvantages of compressed air pulse dust cleaning, has a large reverse blowing distance, can use long filter bags, fully utilizes space, and occupies a small area.

7. The shell is designed with a cyclone dust collector volute inlet, which can play a local cyclone role and reduce the load on the filter bag. The shape of the cylindrical dome is uniform in force and has good blast resistance.

Compared with the commonly used pulse bag filter in China, the rotary back blowing flat bag filter has the following characteristics:

7、 The main features of ZC-II/III mechanical rotary back blowing flat bag dust collector are:

Regeneration condition - As the filtration condition progresses, the retained dust gradually thickens, resulting in an increase in the resistance of the filter bag. When the upper limit of the anti blowing control resistance is reached, the anti blowing machine can be manually turned on as needed, or the differential pressure transmitter can send a signal to automatically start the anti blowing machine and the anti blowing rotary arm transmission mechanism for anti blowing. We can also provide supporting automatic control devices. A counter blowing airflow with sufficient momentum is blown into the filter bag inlet through the rotary arm nozzle, blocking the filtered airflow and changing the pressure conditions inside the bag, causing substantial vibration of the filter bag and shaking off accumulated dust. Rotate the arm in turns and blow back one by one. When the resistance of the filter bag drops to the lower limit, the anti blowing mechanism is manually turned off or automatically stopped. In order to save the power of the anti blowing mechanism and reduce the anti blowing air volume, the three and four circle (i.e. 144ZC-II20ZC type) bag filter is equipped with a segmented anti blowing mechanism to blow only one filter bag at a time.

Filtering condition - The dusty airflow enters the upper space of the filtering chamber tangentially, due to the volute shaped inlet. Large particles and aggregated dust particles spin down the ash hopper along the cylinder wall under centrifugal force. Small particle dust disperses in the gaps between the filter bags in the filtration chamber and is retained by the filter bags. Adhering to the outer layer of the filter bag, purified air passes through the filter wall and collects through the filter bag guide on the flower plate in the clean room, and is sucked out by the ventilation fan and discharged into the atmosphere.

Working principle of ZC-II/III mechanical rotary back blowing flat bag dust collector:

The star shaped ash discharge valve, reduction device and motor, reverse blower, rotary arm reduction mechanism, and circulating air pipeline are all accessories. According to user requirements, it can be equipped on behalf of others. The platform and ladder are not shown in the series of final assembly drawings. They, along with the foundation and circulating air duct of the anti blower, should be designed and installed according to the specific situation on site.

The anti blowing rotary arm is driven by a reducer placed on the top cover. The anti blowing machine is installed on the ground and connected to the rotary arm through a central pipe. For filter bags arranged in three or four circles, the rotary arm is equipped with a segmented anti blowing device.

1. Anti blowing dust cleaning mechanism: including rotary arm, nozzle, loop anti blowing mechanism, circulating air duct, anti blowing pipe, anti blowing machine, and rotary arm deceleration mechanism.

2. Lower box: including positioning support frame, ash hopper, star shaped ash discharge valve, and support.

3. Medium box body: including flower board, filter bag, filter bag frame, filter bag guide, filter chamber cylinder, air inlet, and inlet door.

4. Upper box: including dust collector cover, rotating cover removal device, cleaning room, bag changing inlet, observation hole, and air outlet.