DMC-120 stand-alone pulse bag dust collector

DMC-120 stand-alone pulse bag dust collector technical parameters, D stands for single machine, MC stands for Pulse, DMC stands for stand-alone pulse, 120 stands for 120 bags, DMC-120 stands for 120 bags stand-alone pulse bag dust collector.

12 pulse valves bag dust collector_meitu_2

DMC series single-machine pulse dust collector has the characteristics of simple design structure, high dust removal efficiency and low cost. Among them, DMC-120 single-machine pulse dust collector has six specifications for the time being, each of which can be divided into standard ash bucket type A and open flange type (without ash bucket) type B.

The structure mainly consists of a filter chamber, a filter bag, a clean air chamber, an ash hopper, an ash discharge valve, a pulse blowing device, an electric control box, etc. The box body is all welded, and the inspection door is sealed with a foam rubber strip to ensure the dust collector airtight.

DMC-120 stand-alone pulse bag dust collector is a new type of high-efficiency pulse bag dust collector modified by Weifang Huaxing Machinery through bringing in foreign new equipment and new technology. It has the advantages of large gas processing capacity, stable performance, convenient operation, long life of filter bag and small maintenance workload. Moreover, the reforms from the structure and the pulse valve solve the problem of putting in the open air and low pressure of compressed air. The dust removal device has the advantages of high purification efficiency, filter bag low wear, long service life and convenient maintenance. Suitable for iron and steel smelting, Metallurgy, chemical, electronics, building materials, cement industry, musical instrument processing, carbon processing, mechanical processing, various industrial electric furnaces, asphalt concrete mixing plants, mining, casting, electric power, rubber, pharmaceutical, food Processing, military, ceramics, light industry, various dryers, non-metallic minerals, fine powder deep processing, sandblasting, refractory materials and other industrial air pollution enterprises pollutants recycling.

dust collector making process_meitu_1

Name: DMC-120 stand-alone pulse bag dust collector

1 Air volume(m3/h) 10000
2 Total filtering areas(m2) 96
3 Filtration velocity(m/min.) 1.2~1.5
4 Filter bag quantity (pcs) 120
5 Pulse valve quantity(pcs) 12
6 Inlet dust concentration(mg/Nm3) <1000
7 Exit dust concentration(mg/Nm3) <30
8 Collection efficiency (%) ≥99.9
9 Air leakage rate(%) ≤3
10 Equipment resistance(Pa) 1470~1770
11 Bag material Laminating anti-static Polyester punched felt
12 Filter bag textile process needling
13 Filter bag sewing process Three needle machine
14 Filter bag specification Φ133×2000mm
15 Filter bag permissible temperature ℃ ≤120℃
16 Bag cage specification Φ120*1950mm
17 Bag cage material Carbon steel
18 Bag cage anticorrosion process Surface anticorrosion treatment
19 Filter bag fixing and sealing ways Spring piston ring
20 Pulse valve type and specification 1’’ right angle valve
21 Dust cleaning air source pressure Pa (5-7)x105
22 Air source quality fine
23 Valve opening time 0.08 sec
24 Air consumption 1 m3/min
25 Mode of deashing Online deashing
26 Maintenance method Machine halt
27 Controlling ways Automatic or manual
28 Ash conveying ways Unloader
29 Main pipe dia. φ400mm
30 Draught Fan model Y4-72-5A 15kw
31 Pipe wind speed 22 m/min

DMC-120 pulse series bag dust collector working characteristics

DMC pulse series bag dust collector

1. Compressed air working pressure is 0.4-0.7MP, which can be applied to dedusting areas where the fume and dust is so sticky, which is relatively difficult to remove from the surface of the filter bag;

2. Treating high concentration gas (≦1000g/m3) containing fume and dust ;

3. strong versatility, flexible design;

4. The dust removal efficiency is high, up to 99.9%, and the emission concentration is below 30mg/m3;

5. The width of the blowing and the interval of blowing are controlled by the microcomputer, which is automatically carried out, with high degree of automation, and can be dust cleaning at fixed time or constant pressure;

6. the length of the filter bag is generally not more than 3m.

Dust collector start

The correct operation of the precipitator is directly related to whether the filter bag achieves its optimum performance and effectively prevents premature failure of the filter bag.

1) Complete the following work again before starting:

◇ If the bag is the first time put into use or used but has been cleaned off-line, in order to prevent the filter bag from being clogged, the filter bag must be pre-sprayed. If the bag is already in use, and the dust collector is off-line for only a short period of time, and there is no ash removed, there will be residual ash layer on the bag, so no pre-spraying is required;

◇ Check that all doors of smoke pipes are closed;

◇ Check equipment pipes and joints whether leaks;

◇ Adjust the injection pressure, pulse frequency, pulse width;

◇ Check if the air source condition of the lift valve is satisfied and smooth;

◇ Open the ash conveying system and fully adhere to its working conditions;

◇ Check that whether the inlet air regulating valve of each filter chamber is open.

120 bags pulse dust collector

Maintenance instructions

All maintenance related to the filter bag can be carried out in the gas cleaning room, and the portable top cover on the top of the dust collector is used for inspection and replacement of the filter bag. The dust collector has an inspection platform for inspection and maintenance of the dust cleaning system, electronic control equipment and valves.

As a maintenance procedure, periodic inspections are required to facilitate “fault-free operation”:

☆ Daily: Conduct a patrol inspection of each chamber pressure drop, valve, cylinder and inlet and outlet air valves, and record at least once every two hours;

☆ Weekly: Observe the entire cleaning cycle system to confirm that the cleaning cycle, the operation of the inlet and outlet air valves, and the PLC operation are normal. Check door seal condition check;

☆ Monthly: Check all the inlet and outlet air valve controllers, solenoid valves, travel switches, motors and equipment according to their operation functions;

☆ Every year: randomly select one or two filter bags from each filter chamber to analyze and predict the service life of the filter bags and the required replacement conditions;

☆ Once there is an opportunity, or at least once a year, Check the situation of the possible accumulation of ash in the clean air section of tube nest in the each filter chamber of the precipitator, the condition of the filter bag, the ash accumulation of ash bucket , the performance of electrical components, and the leakage of seals of each valve.

Maintenance of each component:

● Filter bag:

Check the air cleaning chamber and filter bag regularly, or check the presence or absence of dust, water vapor or rust spots according to the abnormal fluctuation of the differential pressure in the chamber. Once this happens, it indicates that the filter bag is damaged or the operating conditions are incorrect.

● Electronic control components:

As with other components of the precipitator, the electronic control components do not require regular service, however, we should check them with the spare time. Inspection of the components such as solenoid valves can be checked in an alternative manner, and the bad components are sent to the manufacturer for repair.

● Electromagnetic pulse valve:

Failure of the diaphragm valve may be due to continuous excitation, accumulation of internal impurities, excessive wear of the diaphragm, or worn plugs that plug the shell.

The opening failure of the diaphragm valve can be detected by the pressure drop of the excess compressed air line or the continuous leaking sound of the valve. After finding the cause of the problem, first remove the system pressure, then remove the bonnet, check the seal of the diaphragm for debris, damage to the diaphragm, and failure of the spring.

Do not attempt to disassemble the diaphragm valve without the system pressure being removed. The cause of the shutdown may be that the excitation signal is too weak, the coil is faulty, the internal impurities are accumulated, or the piston is excessively worn.

The closing fault detection of the diaphragm valve can be checked by an excessively light pulse sound when the solenoid valve is energized. If the solenoid valve does not operate or the electromagnetic part acts but the valve does not move, it indicates that the electromagnetic operation or the controller has a problem and needs to be replaced. The inspection of the solenoid valve includes whether all connections are tight when the power is turned off, and whether the valve is operating normally.

Dust collector status:

The phenomenon of water vapor in the interior of the precipitator, like small puddles or rust spots, is the condensation of acid in hot flue gas or water vapor or leaking from the outside.

The water vapor problem is caused by the condensation of hot flue gas due to insufficient insulation of the operating temperature, or because the closing time of the filter chamber is too long and the internal flue gas temperature is too high when closed, increasing the insulation or correcting the operating procedures to eliminate this problem. If the water vapor is due to leakage, the best way to stop the leak is to clean it first, then embed epoxy or silicone sealant. It can be sealed by sealing welding, but the filter bag must be removed or covered before welding in order to prevent welding sparks, which can be fatal to the filter bag.

Leakage of the access door is generally due to improper door fastening or gasket problems. Correctly tighten the inspection door and replace the aging and deformed gasket to solve the leakage of the inspection door.

● Pressure drop of the dust collector:

The pressure drop of the system is the best manifestation of the performance and status of the precipitator. By operating log, the abnormal pressure drop model indication should be checked immediately!

Too low pressure drop indicates a leak in the system, checking whether the chimney for smoke, and whether there is ash deposits on the tube nest.

Excessive pressure drop indicates many reasons: filter blockage, failure of the ash cleaning system, failure of the inlet and outlet air valve, excessive ash accumulation in the ash bucket, and piping blockage of the differential pressure gauge.

● Filter bag:

If the filter bag is damaged during the warranty period, a replacement record must be provided, the replacement room and filter bag position, replacement date, and the damaged filter bag must be submitted to the supplier for analysis.

● Filter bag disassembly:

1. Security steps:

☆ Close and lock the inlet and outlet air valves of the filter chamber;

☆ Perform 3-4 cleaning operations on the filter chamber to be entered;

☆ Open the door and ventilate, confirm that the filter room is cooled and enter. During the process of entering the personnel, the fan should continue to blow fresh air into the inside;

☆ Keep the inspection door of ash hopper open when the operation is in progress.

2. Disassembly process:

To replace a filter bag, the filter bag should be pulled out together with the bag cage from the top, and sometimes several filter bags need to be taken out to check the situation.


Post time: Apr-07-2019
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