CN207286953U - A kind of cold bunker dust collection device of mixing plant - Google Patents

Abstract

The utility model discloses a dust removal device for a cold material bin of a mixing station, the purpose of which is to reduce costs, avoid waste of resources, and achieve high dust removal efficiency. One group, the upper end of the feeding port of each group of cold feed bins is provided with a dust suction hood, the dust suction hood is connected to the main pipeline through the collection pipeline, the main pipeline is connected to the first induced draft fan, and the first induced draft fan is connected to the dust collector through the pipeline The air inlet of the dust collector is provided with a second induced draft fan, the first induced draft fan, the second induced draft fan and the dust collector are all connected to the controller, and the lower end of the discharge port of the cold storage bin is provided with a belt feeding machine.

Description

A kind of dust removal device for cold material bin of mixing station

technical field

The utility model belongs to the technical field of dust treatment, in particular to a dust removal device for a cold feed bin of a mixing station.

Background technique

As my country pays more and more attention to environmental protection, it pays special attention to the emission problems of some industrial enterprises, and asphalt mixing plant equipment undoubtedly plays a very important role in road construction, but in the actual production of asphalt mixture, different The cold aggregate often contains dust, so when the loader loads the cold silo, dust will be generated here, which not only pollutes the environment, but also seriously endangers the health of equipment and operators. Therefore, a special dust removal device is required in the cold hopper of the mixing equipment to prevent dust from floating.

The current cold silos are generally placed on the ground, generally four to six, and the height of the silos is higher than the ground. When the loader unloads the hopper, it often works through a slope with a certain slope, which will increase additional The energy consumption of large loaders, and if the installation foundation of the cold storage bin is not firm, it may cause accidents in rainy weather.

In the prior art cold material bin dedusting device, all the cold material bins are covered with an integral dust suction hood. Since the particle size of the cold aggregate required for asphalt mixture is different, and the amount of dust contained in the aggregate of different particle sizes is also different, if an integral suction hood is added, the induced draft fan will According to the different air suction volume required in the silo, adjust to the maximum air volume required in the cold material silo, which will often result in increased cost and waste of resources. In addition, generally only one induced draft fan is arranged in the dust collection hood, which will cause the air volume to be increased due to the air suction volume. The lack of cleaning results in incomplete vacuuming.

Contents of the invention

In order to solve the problems in the prior art, the utility model proposes a simple structure, which can reduce the cost, avoid the waste of resources, and efficiently remove the dust from the mixing station cold feed bin dust removal device.

In order to achieve the above purpose, the technical solution adopted by the utility model is as follows: it includes several cold material bins, two cold material bins form a group, and a dust collection hood is arranged at the upper end of the feeding port of each group of cold material bins to absorb dust. The cover is connected to the main pipeline through the collection pipeline, the main pipeline is connected to the first induced draft fan, the first induced draft fan is connected to the air inlet of the dust collector through the pipeline, and the dust collector is provided with a second induced draft fan, the first induced draft fan, Both the second induced draft fan and the dust collector are connected to the controller, and a belt feeder is provided at the lower end of the discharge port of the cold feed bin.

The cold feed bin is arranged below the ground, the feed inlet of the cold feed bin is flush with the ground, and a baffle is arranged between the feed inlets of the two cold feed bins of each group.

A screen is arranged on the feed inlet of the cold feed bin.

The cold material bin is funnel-shaped, and a vibrator is arranged on the side wall.

The cold material bin is provided with a material level sensor and a material shortage alarm.

The number of the cold feed bins is six.

The main pipeline is provided with a first control valve, the collection pipeline is provided with a second control valve, and both the first control valve and the second control valve are connected to the controller.

Both the first control valve and the second control valve are electric butterfly valves.

The dust collector is a bag dust collector.

The controller is a PLC controller.

Compared with the prior art, the utility model sets two cold feed bins with little difference in aggregate particle size as a group, and a dust suction hood is arranged at the upper end of the feeding port of each group of cold feed bins, which avoids the overall suction The disadvantage of the dust cover is that the induced draft fan can adjust the required air suction volume according to the particle size of the cold aggregate in each cold material bin and the amount of dust contained in it. It does not need to open the maximum air volume, thereby reducing the operating cost. The waste of resources is avoided. In addition, the main pipeline is connected to the first induced draft fan, and the first induced draft fan is connected to the air inlet of the dust collector through the pipeline. The dust collector is also equipped with a second induced draft fan. Work without interfering with each other, so that the air volume is kept at the best air induction state, so as to achieve the purpose of high efficiency, energy saving, more thorough dust collection, and to a certain extent reduce dust pollution to the environment.

Furthermore, the cold material bin is set below the ground, the inlet of the cold material bin is flush with the ground, and the cold material bin is changed to an underground structure, which reduces the working intensity of the loader and effectively avoids accidents caused by unreliable foundations. There is a baffle between the feed inlets of the two cold feed bins in each group, and the height of the baffle does not affect the work of the vacuum hood, and the baffle is used to separate the aggregates of different particle sizes from mixing together.

Furthermore, a screen is installed on the feed port of the cold material bin, and the screen has two functions, one is to limit the diameter of the aggregate, and the other is to pass through the screen when the loader is unloading, and the dust generated by the screen will be eliminated immediately. The suction hood sucks away.

Further, the main pipeline is provided with a first control valve, and the collection pipeline is provided with a second control valve. During dust removal, the opening sizes of the first control valve and the second control valve are adjusted according to the dust content in the aggregate, so as to achieve Air volume control, in addition, when some cold storage bins are not working, the dust removal function can be closed through the second control valve.

Description of drawings

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

Fig. 2 is the top view of dust collection hood and cold hopper;

Among them, 1-belt feeder, 2-material shortage alarm, 3-cold material bin, 4-vacuum hood, 5-second control valve, 6-collection pipeline, 7-main pipeline, 8-first control Valve, 9-dust collector, 10-second induced draft fan, 11-vibrator, 12-baffle, 13-screen, 14-material level sensor, 15-first induced draft fan.

Detailed ways

Below in conjunction with specific embodiment and accompanying drawing, the utility model is further explained and illustrated.

Referring to Fig. 1, the utility model comprises several cold feed bins 3, two cold feed bins 3 are a group, and the upper end of the feed inlet of each group of cold feed bins 3 is provided with a dust suction cover 4, and the cold feed bins in the present embodiment The number of bins 3 is six, three dust collection hoods 4 are provided, and the three dust suction hoods 4 are respectively connected to the main pipe 7 through three collection pipes 6, the main pipe 7 is connected to the first induced draft fan 15, and the first induced draft fan 15 Connected to the air inlet of the dust collector 9 through pipelines, the dust collector 9 is provided with a second induced draft fan 10, the main pipe 7 is provided with a first control valve 8, and the collection pipe 6 is provided with a second control valve 5, the first Both the control valve 8 and the second control valve 5 are electric butterfly valves. The first control valve 8 , the second control valve 5 , the first induced draft fan 15 , the second induced draft fan 10 and the dust collector 9 are all connected to the controller, and the lower end of the discharge port of the cold storage bin 3 is provided with a belt feeder 1 . The dust collector 9 is a bag filter, and the controller is a PLC controller.

The cold material bin 3 is set below the ground, the feed port of the cold material bin 3 is flush with the ground, the cold material bin 3 is funnel-shaped, the side wall is provided with a vibrator 11, and the cold material bin 3 is also provided with a material level sensor 14 And lack of material alarm 2. Referring to Fig. 2, a baffle plate 12 is arranged between the feed inlets of the two cold feed bins 3 of each group, and a screen 13 is arranged on the feed inlet of the cold feed bin 3, and the screen mesh 13 sieve hole and the cold feed bin 3 Corresponding aggregate particle size.

In the utility model, the cold material bin 3 is changed into an underground structure, and the feeding port is parallel to the ground, which effectively reduces the working strength of the loader. The cold material bin 3 is separated by color steel plates every two to form a charging structure. Storehouse, dust collection cover 4 is installed above it, there is baffle plate 12 to separate in the middle of these two feed bins, screen cloth 13 is arranged above the cold feed bin, cold feed bin 3 and horizontal ground seal, guarantee that dust can not overflow. Every two cold feed bins 3 with little difference in aggregate particle size are grouped into one group, and each group is equipped with a dust collection cover 4. For example, if the aggregate particle size required by the asphalt mixing plant is 0-4mm, 4-7mm , 7 ~ 11mm, 11 ~ 18mm, 18 ~ 25mm, 25 ~ 40mm, you can set a vacuum hood for the two cold feed bins of 0 ~ 4mm and 4 ~ 7mm, and set the two The cold material bin is equipped with a dust collection hood, and the two cold material bins of 18-25mm and 25-40mm are provided with a dust collection cover, and the dust collection covers are separated from each other without affecting each other. The utility model adopts an independent dust collector 9 instead of directly connecting the first main pipeline 7 with the main dust collector of the asphalt mixing plant, and the working status of the two does not affect each other, thus reducing the dust removal pressure of the main dust collector. Dust remover 9 is a bag filter with good dust removal effect. One end of the first induced draft fan 15 is communicated with the dust collector 9, and the other end is communicated with the first main pipeline 7, and the first main pipeline 7 is communicated with the dust collection cover 4 above the cold storage bin 3 through three converging pipelines 6, and the other end of the dust collector One end communicates with the second induced draft fan 10, the first main pipe 7 is equipped with a first control valve 8, and the other three collecting pipes 6 are respectively equipped with a second control valve 5. The absorbed dust is discharged into the atmosphere through the outlet of the second induced draft fan 10 after being processed by the dust collector 9 .

Referring to Fig. 1, when the asphalt mixing plant is producing materials, the first induced draft fan 15 and the second induced draft fan 10 are always in working condition, when the loader unloads the cold material bin 3, the controller will adjust the three second control valves 5 and the opening size of the first control valve 8, the vacuum cleaner starts to work, carries out linkage control, and starts to suck dust. The cold material bin 3 is provided with a material shortage alarm 2, a vibrator 11 and a material level sensor 14. The vibrator is used to remove the warehouse arch. When the cold material bin 3 is short of material, the material level sensor 14 transmits a signal to the material shortage alarm. 2 to realize the alarm. There is a height-adjustable discharge door at the discharge end of the cold material bin, and the aggregate is sent to the aggregate belt conveyor through the belt feeder 1, which can be controlled by adjusting the opening of the discharge door and the conveying speed of the belt feeder 1 Output volume.

The utility model has a simple structure and low cost, and effectively solves the problem of incomplete dust collection and waste of resources in the prior art in the dust treatment of the cold storage bin. The working intensity of the loader is reduced, and the cost of installing the dust hood is also significantly reduced, and the opening size of the control valve is set according to the dust content in the aggregate, and two separate induced draft fans are used to work at the same time, so that the induced draft device maintains In the best air induction state, it is highly efficient and energy-saving, and the cost of dust suction is completely reduced, and the pollution of dust to the environment is reduced to a certain extent.

Claims (10)

1. a kind of cold bunker dust collection device of mixing plant, it is characterised in that including several cold burden storehouses (3), two cold burden storehouses (3) are One group, the feed inlet upper end of every group of cold burden storehouse (3) is provided with a dust hood (4), and dust hood (4) is connected by collection conduits (6) Main pipeline (7) is connected to, main pipeline (7) is connected to the first air-introduced machine (15), and the first air-introduced machine (15) is connected to dedusting by pipeline The air inlet of device (9), is provided with the second air-introduced machine (10), first air-introduced machine (15), the second air-introduced machine on deduster (9) (10) and deduster (9) is connected to controller, and the discharge port lower end of the cold burden storehouse (3) is provided with belt feeder (1).

2. the cold bunker dust collection device of a kind of mixing plant according to claim 1, it is characterised in that the cold burden storehouse (3) sets Put and flushed in below ground, the feed inlet of cold burden storehouse (3) with ground, is provided between the feed inlet of every group of two cold burden storehouses (3) Baffle (12).

3. the cold bunker dust collection device of a kind of mixing plant according to claim 2, it is characterised in that the cold burden storehouse (3) Sieve (13) is provided with feed inlet.

4. the cold bunker dust collection device of a kind of mixing plant according to claim 3, it is characterised in that the cold burden storehouse (3) is in Funnel-form, is provided with vibrator (11) on side wall.

5. the cold bunker dust collection device of a kind of mixing plant according to claim 4, it is characterised in that on the cold burden storehouse (3) It is provided with level sensor (14) and lacks material alarm (2).

6. the cold bunker dust collection device of a kind of mixing plant according to claim 5, it is characterised in that the cold burden storehouse (3) Quantity is six.

7. the cold bunker dust collection device of a kind of mixing plant according to claim 1, it is characterised in that on the main pipeline (7) The first control valve (8) is provided with, the second control valve (5), the first control valve (8) and the second control are provided with collection conduits (6) Valve (5) is connected to controller.

A kind of 8. cold bunker dust collection device of mixing plant according to claim 7, it is characterised in that first control valve (8) and the second control valve (5) uses electric butterfly valve.

9. according to a kind of cold bunker dust collection device of mixing plant of claim 1-8 any one of them, it is characterised in that the dedusting Device (9) is bag filter.

10. according to a kind of cold bunker dust collection device of mixing plant of claim 1-8 any one of them, it is characterised in that the control Device processed is PLC controller.