Flue gas purification device for annular feeder of calcium carbide furnace

Abstract

The utility model belongs to the technical field of flue gas treatment, and relates to a flue gas purification device for an annular feeder of a calcium carbide furnace, which comprises a feeder body, a ventilation pipe, a dust remover and a dust removal fan, the ventilation pipe is arranged in the feeder body, the dust remover and the dust removal fan are both arranged outside the feeder body, the ventilation pipe is communicated with the dust remover, and the dust remover is communicated with the dust removal fan. The dust remover is connected with the dust removal fan; the connecting pipe is arranged between the ventilating pipe and the dust remover; the connecting pipe is arranged outside the feeder body; and a pneumatic valve is arranged on the connecting pipe. The ventilation pipe is additionally arranged in the feeder body, and the dust removal fan is connected to the dust remover, so that reverse flue gas can be discharged in time, the CO concentration is prevented from exceeding the standard, and the normal operation of the annular feeder and the clean environment are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas treatment and relates to a flue gas purification device for a ring feeder of a calcium carbide furnace. Background Art

[0002] The calcium carbide ring feeder is an automated equipment. Its working principle is to drive the calcium carbide raw materials from the feed port into the ring feeder through a motor, and then transport them to the calcium carbide furnace through a rotating track. During the transportation process, the calcium carbide raw materials are evenly distributed on the surface of the calcium carbide furnace to facilitate the smelting operation of the calcium carbide furnace.

[0003] Since the traditional annular feeder has serious dust leakage when feeding, which seriously affects the working environment, CN211077436U discloses a disc feeder and a disc feeding system. The utility model transforms the structure of the disc roller in the disc feeder, which can enhance the sealing and dustproof effect, effectively prevent calcium carbide dust from entering the roller, effectively protect the bearing assembly, and reduce operating failures. However, in actual production, since the ring feeder is installed on the fifth floor of the calcium carbide furnace, it feeds the silo (conical silo, lime and lignite) on the second floor of the calcium carbide furnace. The material level of the silo is low, and the cover of the calcium carbide furnace is welded and sealed with the electrode. When the calcium carbide furnace is running, smoke will overflow from the calcium carbide furnace and backflow into the ring feeder on the fifth floor. Although the existing ring feeder has good sealing performance, it cannot effectively respond to the smoke that backflows into the inside of the ring feeder through the pipeline. The dust in the smoke will still pollute the equipment and affect the operation of the equipment. At the same time, the CO concentration in the smoke is high. Once there is a lot of backflow smoke, it will pollute the on-site environment and may even cause serious consequences of poisoning of the operators, affecting the health safety of the operators. Utility Model Content

[0004] In view of the technical problem that the existing flue gas backflow causes a large amount of dust and high CO concentration inside the ring feeder, the utility model provides a flue gas purification device for the ring feeder of calcium carbide furnace. By installing a ventilation pipe in the feeder body and then connecting the dust removal fan to the dust collector, the backflowing flue gas can be discharged in time to avoid excessive CO concentration, thereby ensuring the normal operation of the ring feeder and a clean environment.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A flue gas purification device for a calcium carbide furnace ring feeder includes a feeder body, a ventilation duct, a dust collector and a dust removal fan. The ventilation duct is placed in the feeder body, the dust collector and the dust removal fan are both placed outside the feeder body, the ventilation duct is connected to the dust collector, and the dust collector is connected to the dust removal fan.

[0007] It is further defined that the fume purification device of the ring feeder of the calcium carbide furnace also includes a connecting pipe arranged between the ventilation pipe and the dust collector; the connecting pipe is placed outside the feeder body.

[0008] It is further defined that a pneumatic valve is provided on the connecting pipe.

[0009] It is further defined that the flue gas purification device of the calcium carbide furnace ring feeder also includes a CO concentration sensor arranged in the feeder body; the pneumatic valve is controlled by the CO concentration signal detected by the CO concentration sensor.

[0010] It is further defined that the flue gas purification device of the ring feeder of the calcium carbide furnace also includes a controller, which is connected to the CO concentration sensor and the pneumatic valve respectively.

[0011] It is further defined that a dust suction hole is provided on the feeder body, and the connecting pipe passes through the dust suction hole and is connected with the ventilation pipe.

[0012] It is further defined that a dust removal unit is arranged in the dust collector, and the dust removal unit includes a blowing mechanism, a dust suction mechanism and a dust cleaning mechanism arranged in sequence from top to bottom; the connecting pipe is connected to the dust suction mechanism through the dust removal air inlet pipe, and the dust suction mechanism is also connected to the dust cleaning mechanism.

[0013] It is further defined that the blowing mechanism is externally connected to an air main pipe, the air main pipe is provided with a blowing valve, and the blowing valve is a pulse valve.

[0014] It is further defined that there are multiple dust removal units, and the multiple dust removal units are arranged in parallel in the dust collector.

[0015] It is further defined that the fume purification device for the ring feeder of the calcium carbide furnace also includes an inspection door opened on the dust collector and a rainproof shed erected above the dust collector.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model arranges a ventilation duct in the feeder body, and arranges a dust collector and a dust removal fan outside the feeder body. The ventilation duct is connected with the dust collector, and the dust collector is connected with the dust removal fan, so that the smoke that flows back into the feeder body is sucked out to the dust collector in time, avoiding excessive CO concentration and ensuring the normal operation of the ring feeder and a clean environment.

[0018] 2. The utility model sets a pneumatic valve on the connecting pipe and sets a CO concentration sensor in the feeder body; the pneumatic valve is controlled by the concentration signal detected by the CO concentration sensor. When the CO concentration is above 24ppm, the pneumatic valve opens to extract the smoke with higher concentration, ensuring that the environment for personnel meets the requirements.

[0019] 3. In the utility model, the automatic control of the pneumatic valve is realized by the controller, which is easy to operate and effectively avoids the CO concentration exceeding the standard for a long time on site.

[0020] 4. The utility model has an inspection door on the side wall of the dust collector for maintaining the filter cartridge, air duct, etc. The filter cartridge of the dust suction mechanism can be replaced only outside the dust collector without entering the dust collector, which is convenient for replacement. Furthermore, a rainproof canopy is set up above the dust collector to protect the safety of the dust collector equipment, which is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a flue gas purification device;

[0022] Figure 2 This is a schematic diagram of the main view of the dust collector;

[0023] in:

[0024] 1—feeder body; 2—ventilation pipe; 3—connecting pipe; 4—dust removal air inlet pipe; 5—dust collector; 6—dust removal fan; 7—CO concentration sensor; 8—injection mechanism; 9—injection valve; 10—dust suction mechanism; 11—ash cleaning mechanism. DETAILED DESCRIPTION

[0025] The present invention is now described in detail with reference to the accompanying drawings and embodiments.

[0026] Example

[0027] See also Figure 1 A flue gas purification device for a ring feeder of a calcium carbide furnace includes a feeder body 1, a ventilation pipe 2, a dust collector 5 and a dust removal fan 6. The ventilation pipe 2 is placed outside the feeder body 1, and the dust collector 5 and the dust removal fan 6 are both placed outside the feeder body 1. The ventilation pipe 2 is connected to the dust collector 5, and the dust collector 5 is connected to the dust removal fan 6.

[0028] The flue gas purification device of the ring feeder of the calcium carbide furnace provided in this embodiment also includes a connecting pipe 3 arranged between the ventilation pipe 2 and the dust collector 5; the connecting pipe 3 is placed outside the feeder body 1.

[0029] In order to facilitate connection, a dust suction hole is opened on the feeder body 1, and the connecting pipe 3 passes through the dust suction hole and is connected with the ventilation pipe 2.

[0030] Preferably, the diameter of the dust suction hole is 210 mm. The dust suction hole is drilled and welded on site according to the arrangement of the dust collector 5 . The ventilation pipe 2 is a hose and is fixed inside the feeder body 1 .

[0031] Preferably, a connecting flange is installed on the dust suction hole, and after the connecting pipe 3 is connected to the ventilation pipe 2, the connecting pipe 3 is connected and reinforced through the connecting flange, so that the stability of the device is better. When reinforcing, fastening bolts are used, and the reinforcement level is 12.9, and the tail of the bolt has a locking hole, and is fixed with a flange metal locking nut.

[0032] In order to facilitate the control of the dust removal device, a pneumatic valve is provided on the connecting pipe 3.

[0033] Preferably, the dust removal fan 6 is a variable frequency fan with an operating frequency of 45-50 Hz; and the pneumatic valve is a pneumatic butterfly valve.

[0034] In this embodiment, the fume purification device of the ring feeder of the calcium carbide furnace further includes a CO concentration sensor 7 arranged in the feeder body 1; the pneumatic valve is controlled by the CO concentration detection result of the CO concentration sensor 7.

[0035] In this embodiment, the flue gas purification device of the ring feeder of the calcium carbide furnace also includes a controller, which is respectively connected to the CO concentration sensor 7, the pneumatic valve and the dust removal fan 6. The controller is mainly used to control the opening and closing of the valve in the purification device according to a preset threshold value. Exemplarily, the controller can be a Siemens controller.

[0036] The controller is used to realize the interlocking among the CO concentration sensor 7, the pneumatic valve and the dust removal fan 6. When the CO concentration is above 24ppm, the controller controls the pneumatic valve to open and extract the smoke with higher concentration to ensure that the environment for personnel meets the requirements. In addition, when the CO concentration increases, the frequency of the dust removal fan 6 can be adjusted by the controller to increase the dust removal amount and improve the dust removal effect. The interlocking control can also realize the automatic control of the pneumatic valve, which is easy to operate and effectively avoids the CO concentration exceeding the standard for a long time on site.

[0037] See also Figure 2 A dust removal unit is arranged in the dust collector 5, and the dust removal unit includes a blowing mechanism 8, a dust suction mechanism 10 and a dust cleaning mechanism 11 arranged in sequence from top to bottom; the connecting pipe 3 is connected to the dust suction mechanism 10 through the dust removal air inlet pipe 4, and the dust suction mechanism 10 is also connected to the dust cleaning mechanism 11.

[0038] During implementation, the blowing mechanism 8, the dust suction mechanism 10 and the cleaning mechanism 11 all adopt the existing dust collector structure. Specifically, the blowing mechanism 8 is externally connected to an air main pipe, and a blowing valve 9 is provided on the air main pipe. The amount of air entering the blowing mechanism 8 is controlled by the blowing valve 9.

[0039] Specifically, the blowing valve 9 is a pulse valve. Preferably, the pulse valve is a 3-inch right-angle pulse valve to achieve the best blowing effect; at the same time, the blowing nozzle is an explosion head nozzle to increase the blowing effect.

[0040] See also Figure 2There are multiple dust removal units, and the multiple dust removal units are arranged in parallel in the dust collector 5.

[0041] Preferably, there are 7 dust removal units, and the 7 dust removal units are arranged in parallel in the dust collector 5. The dust suction mechanism 10 of each dust removal unit is respectively connected to the connecting pipe 3 to filter the inhaled flue gas, and the dust enters the filter cartridge of the dust suction mechanism 10, and the gas is discharged from the dust suction mechanism 10 for centralized treatment; when the accumulated dust in the filter cartridge increases, it is discharged from the cleaning mechanism 11; at the same time, during the cleaning process, air is passed into the blowing mechanism 8 through the blowing valve 9, and the blowing mechanism 8 blows air to the dust suction mechanism 10 of the dust collector 5, and the air periodically impacts and vibrates the filter cartridge of the dust suction mechanism 10 to make the dust on the filter cartridge fall off, thereby achieving the effect of automatic cleaning.

[0042] During implementation, a dust removal air inlet pipe 4 is also externally connected to the dust collector 5, and the connecting pipe 3 is communicated with the dust suction mechanism 10 through the dust removal air inlet pipe 4.

[0043] In order to ensure the cleaning efficiency of the dust collector 5, an air hammer or a vibration motor is arranged on the ash bin of the cleaning mechanism 11 to knock the outer wall of the ash bin, which can effectively break the arch and ensure smooth dust removal of the dust collector 5.

[0044] In this embodiment, the flue gas purification device of the ring feeder of the calcium carbide furnace also includes an inspection door opened on the dust collector 5. Specifically, the inspection door is opened on the side wall of the dust collector 5 for maintaining the filter cartridge air duct. The filter cartridge of the dust suction mechanism 10 can be replaced only outside the dust collector 5 without entering the dust collector 5, which is convenient for replacement.

[0045] In this embodiment, the flue gas purification device of the ring feeder of the calcium carbide furnace also includes a rainproof canopy erected above the dust collector 5 to prevent rainwater from entering the dust collector 5 and protect the safe operation of the dust collector 5 equipment.

[0046] In addition, the utility model is provided with a step ladder and a maintenance platform from the bottom of the dust collector to the top of the dust collector, and the step ladder and the maintenance platform are paved with patterned plates, the thickness of the patterned plates is ≥ 8mm, which plays an anti-slip role.

[0047] The utility model adds a ventilation pipe in the ring feeder and interlocks with the alarm value of the CO concentration sensor. When the CO index exceeds the standard (higher than 24ppm), the interlocking pneumatic valve automatically opens to extract the gas with high concentration in the ring feeder, avoiding the CO concentration exceeding the standard for a long time on site, ensuring that the environment where personnel are located meets the requirements, ensuring the personal safety of operators, and ensuring the normal operation of the ring feeder.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above embodiments, any modification of the technical solution recorded in the above embodiments or equivalent replacement of some of the technical features therein by ordinary technicians in this field should fall within the protection scope of the utility model.

Claims

1. A flue gas purification device for a ring feeder of a calcium carbide furnace, comprising a feeder body (1), characterized in that: The feeder further comprises a ventilation pipe (2), a dust collector (5) and a dust removal fan (6); the ventilation pipe (2) is arranged inside the feeder body (1); the dust collector (5) and the dust removal fan (6) are both arranged outside the feeder body (1); the ventilation pipe (2) is connected to the dust collector (5); and the dust collector (5) is connected to the dust removal fan (6).

2. The flue gas purification device for the ring feeder of calcium carbide furnace according to claim 1 is characterized in that: The fume purification device for the annular feeder of the calcium carbide furnace further comprises a connecting pipe (3) arranged between the ventilation pipe (2) and the dust collector (5); the connecting pipe (3) is placed outside the feeder body (1).

3. The flue gas purification device for the ring feeder of calcium carbide furnace according to claim 2 is characterized in that: A pneumatic valve is arranged on the connecting pipe (3).

4. The flue gas purification device for the ring feeder of calcium carbide furnace according to claim 3 is characterized in that: The fume purification device for the annular feeder of the calcium carbide furnace further comprises a CO concentration sensor (7) arranged in the feeder body (1), and the pneumatic valve is controlled by a CO concentration signal detected by the CO concentration sensor (7).

5. The flue gas purification device for the ring feeder of calcium carbide furnace according to claim 4 is characterized in that: The fume purification device for the annular feeder of the calcium carbide furnace also includes a controller, which is respectively connected to the CO concentration sensor (7), the pneumatic valve and the dust removal fan (6).

6. The flue gas purification device for annular feeder of calcium carbide furnace according to any one of claims 2 to 5, characterized in that: A dust suction hole is provided on the feeder body (1), and the connecting pipe (3) passes through the dust suction hole and is connected to the ventilation pipe (2).

7. The flue gas purification device for annular feeder of calcium carbide furnace according to claim 6 is characterized in that: A dust removal unit is arranged in the dust collector (5), and the dust removal unit comprises a blowing mechanism (8), a dust suction mechanism (10) and a dust cleaning mechanism (11) which are arranged in sequence from top to bottom; the connecting pipe (3) is connected to the dust suction mechanism (10) through the dust removal air inlet pipe (4), and the dust suction mechanism (10) is also connected to the dust cleaning mechanism (11).

8. The flue gas purification device for annular feeder of calcium carbide furnace according to claim 7 is characterized in that: The spray mechanism (8) is externally connected to an air main pipe, and a spray valve (9) is arranged on the air main pipe. The spray valve (9) is a pulse valve.

9. The flue gas purification device for annular feeder of calcium carbide furnace according to claim 8, characterized in that: There are multiple dust removal units, and the multiple dust removal units are arranged in parallel in the dust collector (5).

10. The flue gas purification device for annular feeder of calcium carbide furnace according to claim 9, characterized in that: The fume purification device for the annular feeder of the calcium carbide furnace also includes an inspection door opened on the dust collector (5) and a rainproof shed erected above the dust collector (5).

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