CN2626585Y - Glass fiber bag-type dust collector - Google Patents

Abstract

The utility model discloses a glass fiber bag-type dust collector, which comprises a shell, a filter bag, an upper flower plate, a lower flower plate, a three-way switching valve, an exhaust pipe, an anti-blowing pipe, an ash hopper, a communication pipe, and an ash discharge pipe. The valve, the upper flower plate and the lower flower plate are respectively arranged on the upper and lower parts of the shell, a filter bag is arranged between the upper flower plate and the lower flower plate, an ash hopper is arranged on the lower part of the shell, and an exhaust pipe and a reverse air duct are installed on the top of the shell The blowing pipe, the connecting pipe and the three-way switch valve, the reverse blowing pipe is connected with the outlet of the reverse blowing machine, and also includes a diversion cone and a central air inlet pipe. The shell is a cylindrical structure, and the central air intake pipe is set on the top of the shell The center passes through the upper flower plate and the lower flower plate inside the shell and enters the ash hopper. A diversion cone is arranged below the central air inlet pipe and above the center of the ash hopper. The inlet of the reverse blower is connected with the branch pipe of the exhaust pipe. This dust collector not only does not cause dew condensation when cleaning dust, but also the flue gas enters each filter bag evenly to eliminate the wear-through of some filter bags due to high local air velocity.

Description

Fiberglass bag filter

technical field

The utility model relates to a flue gas dedusting device, in particular to a glass fiber bag type deduster.

Background technique

At present, it is very difficult to control the flue gas in high-temperature and high-humidity places such as cement shaft kilns and dryers in cement plants. For high-efficiency dust collectors suitable for such industrial and mining enterprises in my country, the effect of using glass fiber bag dust collectors is better. This type of dust collector is roughly divided into two types: one is the upper air inlet and lower air outlet method, the dust accumulation on the upper flower plate is serious, and the overall structure is complicated. When the outside temperature is low, the cold air inhaled by back blowing and dust removal contacts the hot flue gas in the dust chamber, which will easily cause condensation on the surface of the dust collector and filter bag, resulting in the filter bag sticking and affecting the normal operation of the dust collector. Work, shorten the service life of the filter bag. At the same time, when hot and cold gases are in contact, condensation will also be caused on the shell plate, resulting in corrosion of the shell and reducing the service life of the equipment. The other is to adopt the lower air intake method. The air intake pipe of the equipment is located inside the casing, which increases the difficulty of maintenance and increases the space occupied by the equipment. The equipment still uses atmospheric back-blowing to clean dust, and the condensation caused by dust cleaning has not been solved. The dust-cleaning control of this equipment adopts a lifting switching valve. Time affects the cleaning effect. When the flue gas reaches the inside of the dust collector, these two kinds of dust collectors cannot evenly enter the flue gas into each filter bag, resulting in the wear-through of some filter bags due to the high local air velocity. Both of these dust collectors adopt box frame type, which has complex structure, large floor area and high steel consumption.

Utility model content

In order to overcome the deficiencies of the existing glass fiber bag-type dust collectors, such as dew condensation caused by dust cleaning, flue gas cannot evenly enter each filter bag, resulting in wear-through of some filter bags due to high local air velocity, complex structure, and high steel consumption. . The utility model provides a glass fiber bag-type dust collector, which not only does not cause dew condensation when cleaning dust, but also smokes evenly enters each filter bag to eliminate wear-through of some filter bags due to high local air velocity. At the same time, the dust collector has a simple and compact structure, a small footprint and low steel consumption.

The technical solution adopted by the utility model to solve the technical problems is: it contains the shell, the filter bag, the upper flower plate, the lower flower plate, the three-way switch valve, the exhaust pipe, the reverse blow pipe, the ash hopper, the Unicom pipe, the ash discharge The valve, the upper flower plate and the lower flower plate are respectively arranged on the upper and lower parts of the shell, a filter bag is arranged between the upper flower plate and the lower flower plate, an ash hopper is arranged on the lower part of the shell, and an exhaust pipe and a reverse air duct are installed on the top of the shell The blowing pipe, the connecting pipe and the three-way switch valve, the reverse blowing pipe is connected with the outlet of the reverse blowing machine, and also includes a diversion cone and a central air inlet pipe. The shell is a cylindrical structure, and the central air intake pipe is set on the top of the shell The center passes through the upper flower plate and the lower flower plate inside the shell and enters the ash hopper. A diversion cone is arranged below the central air inlet pipe and above the center of the ash hopper. The inlet of the reverse blower is connected with the branch pipe of the exhaust pipe.

The housing is divided into at least four compartments.

The ash hopper is a conical structure.

The beneficial effect of the utility model is that the shell adopts a cylindrical structure, which makes the structure simple and compact, occupies a small area, and reduces steel consumption; since the central air inlet pipe is arranged at the top center of the cylindrical shell and passes through the inside of the shell When the high-temperature flue gas enters the ash hopper from the central air inlet pipe, it can evenly enter each filter bag of the dust collector through the obstruction of the diversion cone, and the large particles of sparks, etc. Due to the inertia effect, it falls directly into the ash hopper, avoiding the direct contact of the large spark particles with the filter material, which will cause the filter bag to burn out. At the same time, because the high-temperature flue gas is blocked by the diversion cone, the wind speed is relatively slow, which also avoids the wear-through of the filter bag due to the high local air speed. Since the secondary clean hot air discharged from the exhaust pipe is blown back and cleaned by its branch pipe through the reverse blower and the reverse blow pipe, the condensation in the dust collector is effectively prevented. Since the dusty gas passes through the lower flower plate and filter bag from bottom to top and then enters the exhaust pipe through the upper flower plate, the secondary clean hot air enters the sub-chamber through the upper flower plate through the reverse blowing pipe for dust cleaning during the dust cleaning process. Therefore, there is no dust accumulation on the upper flower plate, which is convenient for maintenance and reduces the load of the dust collector.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a top view of FIG. 1 .

In the figure 1. Central air inlet pipe, 2. Three-way switching valve, 3. Exhaust pipe, 4. Anti-blow pipe, 5. Upper flower plate, 6. Filter bag, 7. Shell, 8. Lower flower plate, 9. Ash hopper, 10. Diversion cone, 11. Ash discharge valve, 12. Unicom pipe.

Detailed ways

In Fig. 1, the shell 7 is a cylindrical shell, and the inside of the shell 7 is divided into 4 to 6 chambers, and an ash hopper 9 is provided under the shell 7, and the ash hopper 9 is provided with an ash discharge valve 11, and the central air inlet pipe 1. It is set at the top center of the cylindrical shell 7 and passes through the upper flower plate 5 and the lower flower plate 8 inside the shell 7 to enter the inside of the ash hopper 9. A guide cone 10 is set under the central air inlet pipe 1 and placed in the ash hopper. Above the center of the bucket 9, a filter bag 6 is provided between the upper flower plate 5 and the lower flower plate 8, and a three-way switching valve 2 is installed on the top of the cylindrical housing 7 and communicated with the sub-chambers in the housing 7 to exhaust air. The pipe 3 is connected with the three-way switching valve 2 . In figure 2, the blowback pipe 4 communicates with the three-way switching valve 2 through the communication pipe 12 .

The reverse blow pipe 4 is connected with the outlet of the reverse blower, and the inlet of the reverse blower is connected with the branch pipe of the exhaust pipe 3 .

During work, the dust-containing flue gas discharged from the cement shaft kiln or drying enters the interior of the ash hopper 9 below the dust collector housing 7 through the central air inlet pipe 1, and the coarse dust in the dust-laden flue gas is blocked by the diversion cone 10 and The effect of its own gravity directly falls into the ash hopper 9, and the dust is pre-separated. At the same time, under the negative pressure generated by the dust-removing induced draft fan, the flue gas blocked by the guide cone 10 evenly passes through the lower flower plate 8 and enters the filter bags 6 in each chamber of the housing 7, and the dust is retained on the inner surface of the filter bags 6 , the dusty gas is filtered through the filter bag 6 to be purified, and the purified gas is discharged through the upper flower plate 5, the three-way switching valve 2 and the exhaust pipe 3. After the dust collector runs for a period of time, the dust layer collected on the inner surface of the filter bag 6 becomes thicker, and the running resistance of the dust collector increases. When it increases to a certain value, it is necessary to clean the filter bag 6 in a certain sub-chamber. When the microcomputer commands the three-way switching valve 2 to interrupt the communication between the sub-chamber and the exhaust pipe 3, at the same time the three-way switching valve 2 connects the reverse blowing pipe 4 to the sub-chamber, and part of the secondary clean hot air discharged from other sub-chambers is discharged from the exhaust pipe. The branch pipe of 3 enters the reverse blow pipe 4 through the reverse blower. At this time, because the three-way switching valve 2 has connected the reverse blow pipe 4 with the sub-chamber, the secondary clean hot air reaches the sub-chamber. The airflow direction at this time is the same as that of the air exhaust The direction of the air flow is opposite, and the secondary clean hot air compresses and deforms the originally expanded filter bag 6 under the action of the reverse blower, removes the dust attached to the inner surface of the filter bag 6, and the cleaned dust falls into the ash hopper 9. After the cleaning is completed, only need to command the three-way switching valve 2 to connect the sub-chamber with the exhaust pipe 3, and at the same time, the three-way switching valve 2 to make the reverse blow pipe 4 communicate with the sub-chamber to restore the filtering state. Due to the use of the secondary clean hot air discharged from the exhaust pipe 3 to blow back the soot, the dew condensation in the dust collector is effectively prevented.

Claims (3)

1. A glass fiber bag-type dust collector, including a shell, a filter bag, an upper flower plate, a lower flower plate, a three-way switching valve, an exhaust pipe, an anti-blowing pipe, an ash hopper, a communication pipe, an ash discharge valve, and an upper The flower plate and the lower flower plate are respectively arranged at the upper and lower parts of the shell, a filter bag is arranged between the upper flower plate and the lower flower plate, an ash hopper is arranged at the lower part of the shell, and an exhaust pipe, an anti-blow pipe, Unicom pipe and three-way switching valve, anti-blow pipe connected to the outlet of anti-blow blower, characterized in that: it also contains a diversion cone, a central air inlet pipe, the shell is a cylindrical structure, and the central air inlet pipe is set In the center of the top of the housing and through the upper flower plate and the lower flower plate inside the housing, enter the ash hopper, the guide cone is arranged below the central air inlet pipe and Above the center of the ash hopper, the inlet of the reverse blower communicates with the branch of the exhaust pipe. 2. A glass fiber bag filter according to claim 1, characterized in that: the housing is divided into at least four compartments. 3. A glass fiber bag filter according to claim 1, characterized in that: the ash hopper has a conical structure.