CN202400593U - Micro power dust removal device - Google Patents

Abstract

The utility model discloses a micro-power dedusting device, which comprises a feeding pipe and a conveying belt on a belt conveyor. The guide trough; the device also includes an air extraction and dust removal pipe, which is connected to the vent and the material guide trough respectively, and an axial flow fan and an air intake regulating valve are arranged in the air extraction and dust removal pipe. The micro-power dedusting device of the utility model generates air backflow driven by micro-power in the feeding pipe, thereby accelerating the settlement of dust; humidifies the dust in the feeding pipe, makes the dust adsorb on the surface of the material, and further realizes dust purification and dust control. The utility model also realizes the recovery and utilization of kinetic energy at the same time, and reduces the power consumption of dust removal.

Description

A micro power dust removal device

technical field

The utility model relates to a dust removal device, in particular to a micro-power dust removal device, which belongs to the technical field of dust purification and dust control of belt conveyors. the

Background technique

As a continuous transport machine, belt conveyors have been widely used in docks, coal mines, metallurgy, grain, papermaking and other industries. In industrial and mining enterprises, many fragile granular or massive materials need to be transported by belt conveyors. The transfer point of the belt conveyor collides with the belt during the falling process of the incoming material to generate a large amount of dust. In order to avoid and eliminate the dust generated during the transfer process at all levels, the dust purification methods used in the prior art mainly include bag dust removal method and electrostatic dust removal. method or sedimentation dust removal method, etc. the

Taking coal transportation as an example, the common belt transportation system has the following deficiencies in design:

1. Use the pulse type bag filter, because the suction line of the bag filter is long and the suction volume is large, it is easy to enrich the coal powder in the pipeline, and the dust collector pipeline is blocked by the coal powder after long-term operation. It is difficult for the fan to inhale coal dust and needs to be cleaned regularly. The cleaning workload is heavy and difficult.

2. When the coal comes with water, the water vapor adheres to the dust bag and hardens, and it is difficult to remove the hardened coal powder by backwashing with compressed air. In turn, the suction volume of the dust removal fan is reduced, and the enrichment of pulverized coal in the inner wall of the dust collector and in the pipeline is accelerated. Even make the dust collector completely lose the dust removal ability, need to replace the dust bag, clean the dust collector pipe to solve the problem. the

3. The electric valve attached to the dust collector is often difficult to switch due to the harsh working environment. the

At the same time, due to the difficulty of long-term normal operation of the dust collector, the working environment is harsh, and the investment in personal protective equipment is huge, and it is difficult to achieve good results. the

Existing relevant patents have reported non-powered or micro-powered dust removal devices. For example, CN201333358 discloses a micro-power dust collector, which includes a main housing closed and communicated with the lower belt buckle groove, and a filter bag component is arranged on the slideway in the main housing, and the setting of the filter bag component separates the space of the main housing into an upper dust filter guide. The air space communicates with the lower part of the dust space; the filter bag part is composed of a number of cylindrical filter bags arranged on the upper space of the main shell and the lower part of the space section by hanging from the suspension frame. There is a rapping mechanism. The unit still requires the use of a dust bag. CN101898065 and CN201427795 also disclose unpowered dust removal devices. the

At the present stage, the closed storage of coal transportation, the sealed belt transportation, the reduction of dust pollution, the reduction of energy consumption, the reduction of environmental burdens and the improvement of the working environment of operators to achieve the goal of harmonious coexistence with the environment are the requirements of the new dust removal process. the

Contents of the invention

The purpose of this utility model is to provide a micro-power dedusting device, which can be combined with the existing technology and equipment, and through the transformation of the belt conveyor, the dedusting is driven by the breeze power, and the dust is adsorbed on the surface of the coal block after humidification, so as to realize dust purification and dust control; at the same time, it also realizes the recovery and reuse of kinetic energy, reducing the power consumption of dust removal. the

The utility model adopts the following technical solutions:

A micro-power dedusting device, comprising a feeding pipe and a conveyor belt on a belt conveyor, is characterized in that an air vent is provided on the upper part of the feeding pipe, and a closed material guide groove is arranged between the feeding port and the discharging port of the conveyor belt; The device also includes an air extraction and dust removal pipe, which is respectively connected with the ventilation port and the material guide groove, and an axial flow fan and an air intake regulating valve are arranged in the air extraction and dust removal pipe.

The connection between the air extraction and dust removal pipe and the feeding pipe is Y-shaped to prevent materials from falling into the air extraction and dust removal pipe during the descending process. the

Because during the falling process of the discharge pipe of the transfer station of the self-contained conveyor, the material collides with the conveyor belt at the discharge port to generate a large amount of dust. With a similar descending speed, a pressure difference is formed between the discharge port and the discharge port, thereby forming a negative pressure zone in the middle and upper part of the discharge tube and a positive pressure zone at the discharge port and its vicinity. By opening the upper part of the discharge tube Ventilation opening, and a suction and dust removal pipe is connected between the material guide trough and the ventilation opening, so as to form an air return channel in the suction and dust removal pipe, so that the dust generated at the discharge port can accelerate the settlement. An axial flow fan and an air intake regulating valve are installed in the suction and dust removal pipe to adjust the amount of return air. The air intake regulating valve is at the suction port of the air extraction and dust removal pipe, and is used to adjust the amount of backflow air entering the air extraction and dust removal pipe, and the amount of backflow air is increased through the axial flow fan. the

The air extraction and dedusting pipe includes a high-pressure nozzle, which sprays water mist into the material pipe to humidify the dust. The high-pressure nozzle is connected to a water inlet pipeline, which includes a water inlet solenoid valve and a high-pressure water filter. The utility model sprays water mist above the feeding point and in the middle and upper part of the feeding pipe to further accelerate the settling speed of the dust, thereby fundamentally reducing the amount of dust formed near the feeding point, thereby improving the working environment and reducing operation. staff workload. the

The conveyer belt is provided with a closed material guide groove, its function is to prevent the diffusion of dust, and the second is to form an air return channel at the blanking port. The formation of the closed space in the guide groove can be divided into two ways. One way is to install dust-proof curtains before and after along the direction of the conveyor belt, among which double-layer dust-proof curtains are set on the inlet side, and three-layer dust-proof curtains are set on the outlet side; double-layer dust-proof rubber pads are set on the side of the conveyor belt, so as to realize the smoothness of the guide groove. Fully enclosed. Another way is to extract the negative pressure formed in the guide tank through the backflow of air in the air extraction and dust removal pipe, so as to prevent the coal powder from diffusing into the transfer station. the

The micro-power dedusting device adopts PLC system to realize automatic control. the

The working process of the described micro-power dedusting device is:

1. Before the belt conveyor is started, the water inlet solenoid valve and the axial flow fan are opened successively to form a closed air return flow in the dust removal device.

2. When the belt conveyor is turned on, the material conveying begins. With the increase of the conveying volume, the power of the axial flow fan decreases, and the air return is mainly provided by the pressure difference formed by the material falling. the

3. In the later stage of transportation, increase the power of the axial flow fan with the reduction of the transportation volume to prevent dust from flying out. After the material is conveyed, stop the belt, the axial flow fan in turn, and finally close the water inlet solenoid valve. the

Beneficial effects of the present utility model: the micro-power dedusting device of the present utility model, through the improvement of the discharge pipe, generates air backflow driven by micro-power in the discharge pipe, thereby accelerating the settlement of dust; humidifies the dust in the discharge pipe, so that Dust is adsorbed on the surface of the material to further realize dust purification and dust control. The utility model also realizes the recovery and utilization of kinetic energy at the same time, and reduces the power consumption of dust removal. Due to the effective control of dust, the working environment of on-site operators has been improved, the labor intensity has been greatly reduced, clean production and transportation have been realized, and a good human-machine relationship has been achieved; at the same time, coal powder flash explosions and short-circuit sparks on the site have been reduced. , spontaneous combustion and other vicious accidents. the

The present invention will be described in detail below in conjunction with specific embodiments. The protection scope of the present invention is not limited by the specific embodiments, but by the claims. the

Description of drawings

Figure 1 is a schematic structural diagram of the micro-power dust removal device of the present utility model. the

Among them: 1 feeding port, 2 feeding port, 3 feeding pipe, 4 air intake control valve, 5 axial flow fan, 6 high pressure nozzle, 7 double-layer dust-proof curtain, 8 three-layer dust-proof curtain, 11 water inlet electromagnetic Valve, 12 high-pressure water filter, 15 air vent, 16 suction dust removal pipe, 17 material guide groove. the

Fig. 2 is a sectional view of the blanking point of the micro-power dedusting device of the present utility model. the

Among them: 1 feeding port, 9 inner dust-proof rubber pad, 10 outer dust-proof rubber pad. the

Detailed ways

A micro-power dedusting device is used in a coal belt conveyor system, and the device is automatically controlled by the PLC system of the coal storage and transportation unit. the

As shown in Figures 1 and 2, the micro-power dedusting device includes a feeding pipe 3, a conveyor belt, a material guide trough 17, an air extraction and dust removal pipe 16, an axial flow fan 5 in the air extraction and dust removal pipe 16, and an air intake control valve 4 and high-pressure sprinklers. the

A vent 15 is set on the upper part of the feeding pipe 3 of the belt conveyor, and a closed material guide trough 17 is arranged between the upper feeding port 2 and the discharge port of the belt conveyor, and an air extraction and dust removal pipe 16 is connected between the vent 15 and the material guide trough 17 , The air extraction and dust removal pipe 16 forms a Y-shaped connection with the feeding pipe 3 at the vent 15 to prevent materials from falling into the air extraction and dust removal pipe 16 during the descending process. the

Air suction and dust removal pipe 16 inlets are provided with air intake regulating valve 4, and axial fan 5 and high-pressure water spraying device are also installed inside. The high-pressure water spraying device comprises a high-pressure nozzle 6, a water inlet solenoid valve 11 and a high-pressure water filter 12, which are connected by a water inlet pipeline. The high-pressure nozzle 6 can spray water mist into the feed pipe 3 . the

Guide groove 17 is along conveyer belt direction, and entrance side is provided with double-layer dust-proof curtain 7, and outlet side is provided with three-layer dust-proof curtain 8, and side is provided with inner and outer double-layer dust-proof rubber pads 9,10. the

The described micro-power dedusting device, when the belt is started, starts the axial flow fan 5 due to the system interlocking, and the valve opening time of the high-pressure water inlet solenoid valve 11 is earlier than 30 seconds before the start of the axial flow fan 5. After the axial flow fan 5 is started, The belt conveyor starts to start.

The pipe diameter of the air extraction and dust removal pipe 16 is 400-600mm, and the power of the axial flow fan 5 is selected between 0.75kwh-2.5kwh. At this time, the axial fan 5 is used as the main power source to form a closed and stable air loop. Choose 1 to 4 high-pressure nozzles 6 with a spray angle of 80 to 115 degrees and a water output of 10 to 50 L/H to serve as auxiliary power sources during operation. When there is coal falling, the amount of coal is measured by the belt scale of the weight device, so as to measure and calculate the main power source of the system, the pressure difference between the coal block discharge port 1 and the belt discharge port 2, and then adjust the axial flow fan through the frequency converter The rotating speed of 5 makes it consistent with the amount of coal in the system, so as to achieve the purpose of energy saving and dust reduction. the

When the coal delivery of the system is finished, the amount of coal transported by the belt decreases and the pulverized coal increases, and the output power of the axial flow fan 4 increases to prevent dust from overflowing. When the belt stops running 30 seconds later, the axial flow fan 5 stops running, and the axial flow fan 5 stops running. After 30s, the water inlet solenoid valve 11 is closed. The system enters the inspection state, waiting for the next coal delivery. the

The above-mentioned micro-power dedusting device is adopted on the coal belt conveyor system, the coal leakage in the system is less than 1T/week, and there is almost no coal powder deposition on the ground outside the transfer station, basically realizing the clean production and transportation of coal. the

Claims (8)

1. a microkinetic dust collector comprises tremie pipe (3) and load-transfer device on the ribbon conveyer, it is characterized in that, offers vent window (15) on tremie pipe (3) top, and osed top deflector chute (17) is set between load-transfer device blanking port (2) and the discharging opening; Described device also comprises the dust removing tube of bleeding (16), and the dust removing tube of bleeding (16) is connected with deflector chute (16) with vent window (15) respectively, and prerotator (5) and air inlet adjustment valve (4) are set in the dust removing tube of bleeding (16).

2. microkinetic dust collector according to claim 1 is characterized in that, the described dust removing tube of bleeding (16) is Y-shaped in the junction with tremie pipe (3).

3. microkinetic dust collector according to claim 1 and 2 is characterized in that, the caliber of the described dust removing tube of bleeding (16) is at 400～600mm, and prerotator (5) power is between 0.75kwh ~ 2.5kwh.

4. microkinetic dust collector according to claim 1 and 2 is characterized in that, comprises high pressure nozzle (6) in the described dust removing tube of bleeding (16).

5. microkinetic dust collector according to claim 4 is characterized in that, described high pressure nozzle (6) is 1～4 piece, spray angle 80～115 degree, aquifer yield 10～50L/H.

6. microkinetic dust collector according to claim 4 is characterized in that, described high pressure nozzle (6) connects entering water electromagnetic valve (11) and high pressure water filter (12) through inlet channel.

7. microkinetic dust collector according to claim 1 and 2 is characterized in that, described deflector chute (17) is provided with double-deck dustproof shade (7) along the belt direction inlet side, and outlet side is provided with three layers of dustproof shade (8); The load-transfer device side is provided with inside and outside dustproof rubber cushion (9,10).

8. microkinetic dust collector according to claim 1 and 2 is characterized in that, described microkinetic dust collector adopts PLC system automatic guidance.

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