CN104906904A - Artificial sandstone aggregate production system and dust suppression and removing method thereof - Google Patents

Abstract

The invention provides an artificial sandstone aggregate production system and a method for reducing and removing dust. The artificial sandstone aggregate production system includes a crushing unit and a dust-removing device arranged above the crushing unit. The dust-removing device includes A dust collection hood and a dust collector, the dust collection hood is provided with a dust suction port and a dust discharge port, the dust suction mask of the dust collection hood is arranged above the dust blowing port of the crushing unit, and the dust discharge port of the dust collection hood The port is connected with the inlet of the dust collector through a pipeline. The invention reduces the dust escaping during the processing of the artificial sand aggregate and reduces environmental pollution.

Description

Artificial sand and gravel aggregate production system and its dust reduction method

technical field

The invention relates to the technical field of artificial sand and gravel aggregate production, in particular to an artificial sand and gravel aggregate production system with a dust reduction device and a corresponding dust reduction and removal method.

Background technique

In recent years, with the continuous improvement of artificial sand and gravel aggregate production technology, artificial sand and gravel aggregate has been widely used in hydropower projects. As the society pays more and more attention to environmental issues, the environmental pollution problems such as dust caused by the production of artificial sand and gravel aggregates have gradually attracted people's attention. How to remove dust for the artificial sand and gravel aggregate production system Become a new direction of technology research.

The production process of sand aggregate processing system can be divided into wet processing and dry processing, among which dry processing is the most commonly used processing technology. Because some types of artificial sand and gravel aggregates contain more mud particles and stone powder, the quality of the produced aggregates is not good, so a wet processing process has been developed. The principle of wet processing is to wash the aggregate with water during the production process to achieve the purpose of removing mud particles and stone powder in the aggregate, and at the same time, it can also appropriately reduce dust pollution.

Since the wet processing process washes the sand and gravel aggregates with water during the production process, the amount of dust raised is smaller than that of the dry process. However, in the actual application process, not all the processing links of wet processing are washed with water, and large dust pollution will still be generated in some links. Moreover, the wet processing process also has obvious disadvantages as follows:

1. Not all types of sand and gravel aggregates can be produced by wet processing.

2. Excessive moisture content in the semi-finished product during wet processing will accelerate the wear of the wear-resistant parts of the crusher and affect the crushing effect during sand making.

3. Dehydration measures need to be added in some process links of wet processing, and it is necessary to consider setting up additional dehydration stockpiles and increasing the space occupied by the site.

4. Some concrete aggregates have certain requirements on the content of stone powder, and the content of stone powder in the aggregate obtained by wet processing is low, which may be difficult to meet the use requirements.

To sum up, although the wet processing technology can properly reduce dust pollution, it cannot completely replace the dry processing technology. Therefore, it is necessary to consider other methods to effectively reduce the dust emission during the production process.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention proposes an artificial sand aggregate production system, and also proposes a dust reduction method for the artificial sand aggregate production system. The dust reduction device of the artificial sand aggregate production system reduces the labor cost. The dust escapes during the processing of sand and gravel aggregates to avoid pollution.

An artificial sand and gravel aggregate production system proposed by the present invention includes a crushing unit and a dust-removing device arranged above the crushing unit. The dust-removing device includes a dust collection hood and a dust collector. Dust suction port and dust discharge port, the dust suction mask of the dust collection hood is arranged above the dust blowing port of the crushing unit, and the dust discharge port of the dust collection hood is connected with the inlet of the dust collector through a pipeline.

Further, the dust collection hood is arranged vertically and is in the shape of a truncated cone that tapers from bottom to top, and the cross-sectional area of the dust suction port is larger than the cross-sectional area of the dust blowing port of the crushing unit; The outlet is butted with the upper opening of an ash hopper.

As an implementable manner, the artificial sand and gravel aggregate production system also includes a feeder connected to the crushing unit through a conveyor belt. Connected primary crusher, secondary crusher and sand making machine;

The artificial sand and gravel aggregate production system also includes a spraying unit, and the spraying unit includes a pool, an air tank, and a plurality of atomizing nozzles arranged in parallel; each of the atomizing nozzles is connected to the pool and the The air tank, the atomizing nozzle is arranged on the conveyor belt and/or above the conveyor belt.

Further, the atomizing nozzle is located above the conveyor belt or the starting end of the conveyor belt.

As an implementable manner, a dust cover is provided above the conveyor belt and/or the conveyor belt, and the atomizing nozzle is located in the dust cover.

Further, the dust collector is a cyclone multi-tube dust collector.

As an implementable manner, both sides of the conveyor belt and/or each of the conveyor belts are respectively provided with a first side plate and a second side plate for preventing the aggregate from slipping, and the two sides of the dustproof cover are respectively It is fixed to the first side plate and the second side plate by means of a mounting piece.

Furthermore, at least one vibrating screen for screening is respectively arranged between the coarse crusher and the secondary crusher, between the secondary crusher and the sand making machine, and after the sand making machine ;

The number of the dust collecting hood is multiple, and they are respectively set on the dust raising port of the coarse crusher, the dust raising port of the secondary crusher, the dust raising port of the sand making machine and the dust raising port of the vibrating screen. .

The present invention also proposes a method for reducing and removing dust in an artificial sand and gravel aggregate production system. Using the artificial sand and gravel aggregate production system, the method for reducing and removing dust in the artificial sand and gravel aggregate production system includes the following steps:

S1, the artificial sand and gravel aggregate production system is started, and the crushing unit starts to crush;

S2, collecting dust at the dust outlet of the crushing unit through a dust collecting hood;

S3, the dust particles in the flying dust are separated from the air flow by the dust collector and collected on the wall of the device, and the dust particles fall into the ash hopper under the action of their own gravity for dust removal.

As an implementable manner, S4 is also set after the S1, the aggregate input in the feeder is transported to the crushing unit through the conveyor belt, and the The atomizing nozzle above the conveyor belt sprays water on the crushed aggregate to reduce dust.

Compared with the prior art, the present invention has the beneficial effects that: the dust collection cover and the dust collector are used together in the dust removal device of the artificial sand and gravel aggregate production system to remove dust; the starting end of the conveyor belt with relatively large dust pollution during transportation is provided with fog Nozzles are used to attach water mist particles to the surface of sand and gravel aggregates to achieve dust reduction; a dust cover is installed on the conveyor belt to prevent dust from escaping during transportation and to prevent dust from being generated by external strong winds during transportation. The structure is reasonable, the equipment is reliable and easy to maintain, the effect of dust removal and dust reduction is obvious, and the application range is wide, which can effectively reduce the flying dust generated in the artificial aggregate production process.

The dust removal method of the artificial sand and gravel aggregate production system can effectively prevent the dust from escaping into the atmosphere and reduce environmental pollution through the above-mentioned means; it can also be applied to wet processing technology and dry processing technology.

Description of drawings

Fig. 1 is the schematic flow chart of the structure of the dedusting device of the artificial sand aggregate production system;

Fig. 2 is a schematic diagram of the installation position of the dust collecting hood and its connection relationship with the dust collector;

Fig. 3 is the schematic diagram of the section front view of the installation relationship between the conveyor belt and the dust cover;

Fig. 4 is a schematic left view of Fig. 3;

Fig. 5 is a schematic diagram of the arrangement of atomizing nozzles.

Reference signs:

10-feeder; 20-crushing unit; 22-coarse crusher; 23-intermediate crusher; 24-sand making machine; 25-vibrating screen;

26-conveyor belt; 261-first side plate; 262-second side plate; 264-transmission wheel; 265-installation piece;

27-atomizing nozzle; 28-conveyor belt; 31-dust cover; 32-dust collector; 33-dust cover;

41-high pool; 42-air tank.

Detailed ways

The above and other technical features and advantages of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

Please refer to FIG. 1 , the present invention proposes an artificial sand and gravel aggregate production system, which includes a crushing unit 20 and a dust-removing device arranged above the crushing unit 20 . The dust-removing device includes a dust collection cover 31 and a dust collector 32. The dust collection cover 31 is provided with a dust suction port and a dust discharge port. The dust outlet is connected with the inlet of the dust collector 32 through a pipeline.

The dust collection cover 31 and the dust collector 32 in the dust removal device are used together for dust removal. The structure of the dust removal device is reasonable, the equipment is reliable and easy to maintain, the effect of dust removal and dust reduction is obvious, and the application range is wide, which can effectively reduce the artificial aggregate production process. Generated flying dust. The present invention especially solves the problem of serious dust pollution in the dry process. The technical solution of the present invention is different from washing the aggregate in the wet process. It can meet the requirements of the production of stone powder content.

Further, please refer to Fig. 2, the dust collection hood 31 is vertically arranged, and the shape of the dust collection hood 31 is a truncated cone that tapers from bottom to top. Preferably, the dust suction port is at the bottom end, and the dust discharge port is at the bottom. At the top, the cross-sectional area of the dust suction port is greater than that of the dust discharge port, so that the upwardly flying dust can be collected in the dust collection cover 31, and the dust concentrates at the top dust discharge port from bottom to top. The cross-sectional area of the dust suction port is greater than that of the dust-raising port of the crushing unit 20, so that the dust collecting cover 31 can be completely covered on the dust-raising port of the crushing unit 20. In this embodiment, the central axis of the dust suction port of the dust collection hood 31 coincides with the central axis of the dust discharge port, and air convection is formed in the dust collection hood 31 , which is beneficial for the dust to be discharged from the dust discharge port more smoothly.

The outlet of the dust collector 32 is docked with the upper opening of an ash hopper. The dust collector 32 separates the dust particles in the dust from the air flow by centrifugal force and collects them on the wall of the device, and then makes the dust particles fall into the ash hopper by gravity. The outlet of the dust collector 32 in Fig. 2 is located below the dust collector 32, and the dust particles directly enter the ash hopper when they fall to collect and remove dust. Furthermore, the dust remover 32 is a cyclone multi-tube dust remover, and the dust removal effect is better.

As an implementable manner, as shown in FIG. 1 , the artificial sand and gravel aggregate production system also includes a feeder 10 for inputting aggregates, and the feeder 10 is connected with a crushing unit 20 through a conveyor belt 28 . The crushing unit 20 includes a coarse crusher 22 , a secondary crusher 23 and a sand making machine 24 arranged in the order of aggregate crushing, and the crushing equipment is connected in sequence by a conveyor belt 26 . In this embodiment, the feeder 10 is a vibrating feeder, the primary crusher 22 is a jaw crusher, the secondary crusher 23 is an impact crusher, and the sand making machine 24 is an impact crusher, so that Better crushing effect.

The artificial sand and gravel aggregate production system also includes a spraying unit, which includes a water tank, an air tank and a plurality of atomizing nozzles 27 arranged in parallel. Each atomizing nozzle 27 is connected to the pool and the air tank by pipeline respectively, and the atomizing nozzle 27 is arranged on the conveyor belt 28 and/or the top of the conveyor belt 26; The nozzle 27 sprays water mist through air pressure to make the surface of the sand and gravel aggregate adhere to water mist particles to achieve dust reduction. Further, the atomizing nozzle 27 is located above the starting end of the conveyor belt 28 or conveyor belt 26 . In actual use, when the starting end of the conveyor belt 28 outputs unbroken aggregates, and when the starting end of the conveyor belt 26 outputs broken aggregates, it is easy to generate relatively large dust pollution. Arranging the atomizing nozzle 27 above the starting end can significantly improve the dust suppression effect, and prevent dust from spreading from the source.

As an implementable manner, as shown in FIG. 3 , a dust cover 33 is provided above the conveyor belt 28 and/or the conveyor belt 26 , and the atomizing nozzle 27 is located in the dust cover 33 . Conveyor belt 28 or conveyor belt 26 has more serious dust emission at the starting end, and the dust is relatively small during the transmission process, but due to external conditions (gale, etc.), the dust particles are easy to scatter, thereby polluting the environment. It is enclosed in the space covered by the dust cover 33 to avoid dust escaping during transportation, and to avoid dust raising due to external strong winds during the transportation process; meanwhile, the atomizing nozzle 27 is used in the dust cover 33 to carry out dust reduction treatment on the flying dust.

In this embodiment, the cross-sectional shape of the top of the dust cover 33 is arc-shaped, and vertical walls are arranged on both sides of the arc-shaped top. The cross-sectional shape of dust cover 33 can also be arc, and the shape of arc is round and smooth, prevents dust from hiding in the junction of arc top and vertical wall, and the two ends of arc extend to the both sides of conveyor belt 26 respectively.

As an implementable mode, as shown in FIG. 3 , the two sides of the conveyor belt 28 and/or each conveyor belt 26 are respectively provided with a first side plate 261 and a second side plate 262 for preventing the aggregate from slipping off. The two sides of 33 are respectively fixed to the first side plate 261 and the second side plate 262 by means of mounting pieces 265 . In this embodiment, the mounting part 265 is a connecting rod, and the mounting part 265 can also be a bolt, which directly fixes the left and right sides of the dust cover 33 (relative to the forward direction of the conveyor belt 28 or the conveyor belt 26) to the first side plate 261 And on the second side plate 262. Please refer to FIG. 4 , the conveyor belt 28 or conveyor belt 26 is driven by two co-rotating conveyor wheels 264 .

Furthermore, at least one vibrating screen 25 for screening is provided between the coarse crusher 22 and the secondary crusher 23 , between the secondary crusher 23 and the sand making machine 24 , and after the sand making machine 24 . In this embodiment, as shown in Fig. 1, two vibrating screens 25 are arranged between the coarse crusher 22 and the secondary crusher 23, and large-grained aggregates are sifted out to the large stone yard for use. The quantity of dust collection cover 31 is multiple, and cover is respectively arranged on the dust raising mouth of coarse crusher 22, the dust raising mouth of secondary crusher 23, the dust raising mouth of sand making machine 24 and the dust raising mouth of vibrating screen 25.

In this embodiment, the larger granular aggregate screened out by the vibrating screen 25 adjacent to the coarse crusher 22 is again input into the coarse crusher 22 for crushing through the reverse conveyor belt, and the vibrating screen 25 after the sand making machine 24 A reverse conveyor belt is also arranged on the top to input the larger granular aggregates into the sand making machine 24 again for crushing, and an atomizing nozzle 27 or a dust cover 33 can also be set at the starting end of the reverse conveyor belt to reduce dust.

Please refer to Fig. 5, a high-level pool 41 and an air tank 42 are set in the artificial sand aggregate production system, and multiple parallel atomizing nozzles 27 are respectively arranged at corresponding positions of the artificial sand aggregate production system. The high-level pool 41 and the air tank 42 need to be calculated according to the water consumption and air consumption of the production system, and multiple small-volume high-level pools 41 and air tanks 42 can also be installed; the high-level pool 41 can also be produced by borrowing artificial sandstone aggregates System pool.

The present invention also proposes a method for reducing and removing dust in an artificial sand aggregate production system. Using the above-mentioned artificial sand and gravel aggregate production system, the method for reducing and removing dust in the artificial sand and gravel aggregate production system includes the following steps:

S1, the artificial sand and gravel aggregate production system starts, and the crushing unit 20 starts crushing;

S2, collecting dust at the dust outlet of the crushing unit 20 through the dust collecting cover 31;

S3, the dust particles in the flying dust are separated from the air flow by the dust collector 32 and collected on the wall of the device, and the dust particles fall into the ash hopper under the action of their own gravity for dust removal. The above means can effectively prevent the dust from escaping into the atmosphere and reduce environmental pollution; and it can be applied to wet processing technology and dry processing technology.

As an implementable mode, S4 is also set after S1. The aggregate input in the feeder 10 is transported to the crushing unit 20 through the conveyor belt 28, and is arranged above the conveyor belt 28 and/or the conveyor belt 26 of the crushing unit 20. The atomizing nozzle 27 sprays water for the crushed aggregate to reduce dust.

According to the characteristics of each link of the processing technology, the present invention is respectively equipped with corresponding dust removal or dust reduction equipment, thereby forming a set of dust removal and reduction devices applied to the sand and gravel aggregate production and processing system. The dust produced by the equipment is prevented from spreading by the dust cover 33, the dust is collected by the dust collection cover 31 and the dust collector 32, and the dust is lowered at the starting end of the conveyor belt 26 by the atomizing nozzle 27, and the dust is sprayed onto the dust in the form of water mist to reduce the dust. Water mist particles can also be attached to the surface of the aggregate, and it is not easy to generate dust due to external conditions (gale, etc.) during the transmission process.

Although the number and type of equipment included in sand and gravel aggregate production and processing systems of different scales are inconsistent, the basic equipment is similar, such as vibrating feeder, jaw crusher (coarse crusher 22), impact crusher (intermediate crushing Machine 23), impact crusher (sand making machine 24), conveyor belt 26, vibrating screen 25, etc., when processing aggregates, various equipment are combined according to specific application requirements. The structure of the present invention is reasonable, the equipment is reliable and easy to maintain, and the effect of dust removal and dust reduction is obvious. It is suitable for the production system of sand and gravel aggregates in hydropower projects, artificial sand production lines, etc., and can effectively reduce the dust hazards in the production process of artificial aggregates and reduce the environment. pollute.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the protection scope of the present invention. . In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a materials of man-made sand production system, comprise broken unit, it is characterized in that, described materials of man-made sand production system also comprises being arranged on falls dust arrester above described broken unit, the described dust arrester that falls comprises dust gathering arrester and deduster, described dust gathering arrester is arranged suction port and dust-exhausting port, the suction port of described dust gathering arrester is located at above the airborne dust mouth of described broken unit, and the dust-exhausting port of described dust gathering arrester is connected by the entrance of pipeline with described deduster.

2. materials of man-made sand production system according to claim 1, is characterized in that, described dust gathering arrester is vertically arranged and truncated cone shape in convergent from bottom to up, and the cross-sectional area of described suction port is greater than the cross-sectional area of the airborne dust mouth of described broken unit; The outlet of described deduster is docked with the upper end open of an ash bucket.

3. materials of man-made sand production system according to claim 1, it is characterized in that, described materials of man-made sand production system also comprises the batcher be connected with described broken unit by conveyer belt, described broken unit comprise by aggregate fragmentation sequencing arrangement and the boulder crusher, intermediate crusher and the sand machine processed that are connected successively by conveyer belt;

Described materials of man-made sand production system also comprises spray unit, and described spray unit comprises pond, air tank and multiple atomizer be arranged in parallel; Each described atomizer is connected to described pond and described air tank respectively by pipeline, and described atomizer is arranged on the top of described conveyer belt and/or described conveyer belt.

4. materials of man-made sand production system according to claim 3, is characterized in that, described atomizer is positioned at the top of the initiating terminal of described conveyer belt or described conveyer belt.

5. materials of man-made sand production system according to claim 3, is characterized in that, above described conveyer belt and/or described conveyer belt, cover dust hood of setting up defences, described atomizer is positioned at described dust cover.

6. the materials of man-made sand production system according to any one of claim 1 to 5, is characterized in that, described deduster is cyclone-type multi-pipe dust collector.

7. the materials of man-made sand production system according to any one of claim 3 to 5, it is characterized in that, the both sides of described conveyer belt and/or each described conveyer belt are respectively equipped with the first side plate for stopping aggregate landing and the second side plate, and the both sides of described dust cover are fixed on described first side plate and described second side plate respectively by installed part.

8. materials of man-made sand production system according to claim 3, is characterized in that, is respectively provided to a vibratory sieve for sieving less between described boulder crusher and described intermediate crusher, between described intermediate crusher and described sand machine processed, after described sand machine processed;

The quantity of described dust gathering arrester is multiple, and is located at the airborne dust mouth of described boulder crusher, the airborne dust mouth of described intermediate crusher, the described airborne dust mouth of sand machine processed and the airborne dust mouth of described vibratory sieve respectively.

9. materials of man-made sand production system a dust collection method falls, it is characterized in that, adopt the materials of man-made sand production system described in any one of claim 1 to 8, the dust collection method that falls of described materials of man-made sand production system comprises the steps:

S1, materials of man-made sand production system starts, and broken unit starts fragmentation;

S2, collects airborne dust by dust gathering arrester at the airborne dust mouth place of described broken unit;

S3, being separated from air-flow by the grit in described airborne dust by deduster and being collected in wall, grit falls into ash bucket in self gravitation effect, carries out dedusting.

10. materials of man-made sand production system according to claim 9 dust collection method falls, it is characterized in that, after described S1, also S4 is set, the aggregate inputted in batcher by tape transport to described broken unit, be broken aggregate water spray by the atomizer above the conveyer belt that is arranged on described conveyer belt and/or described broken unit, carry out depositing dust.