Building type equipment for producing various gravel aggregates

Abstract

The invention provides building type equipment for producing various gravel aggregates, which comprises a building type structure distributed in a multi-layer manner, the forming of the gravel aggregates of various specifications and the collection of finished products are distributed in an integrated manner in the building type structure, the top layer of the building type structure is provided with a first surge bin for receiving and guiding the gravel aggregates, and the bottom layer of the building type structure is provided with a second surge bin for receiving and guiding the gravel aggregates. The building type structure is provided with a first screening device at an outlet of the first surge bin, a second screening device for receiving and guiding screen materials of the first screening device is arranged on the lower layer of the first screening device, and a medium fine crushing device in closed circulation with the screen materials on the upper portion of the first screening device is arranged in the building type structure. A shaping sand making device which is in closed-loop circulation with part of oversize materials of the second screening device is further arranged in the building type structure, and sand washing equipment which is connected with oversize materials of the second screening device is arranged on the lower layer of the second screening device. The first material conveying device is used for conveying the gravel aggregate into the building type structure, and the requirement for specification aggregate for actually produced multi-graded concrete is met through all devices and finished product material piles in the building type structure.

Description

Technical Field

[0001] The invention relates to the technical field of artificial sand and gravel aggregate processing, and in particular to a building-type equipment for producing a variety of sand and gravel aggregates. Background Art

[0002] At present, many national key projects, such as pumped storage power stations, key railway projects, key highway projects, water diversion projects and other major strategic infrastructure projects, have built their own sand and gravel systems every year during the construction process. The sand and gravel system has the characteristics of short service life (the sand and gravel system of each project has an approximate service life of 3-5 years) and relatively fixed production scale. The existing sand and gravel system occupies a large area and has prominent land use issues, resulting in the scattered layout of various parts and a large number of equipment, so that the production of multi-graded concrete with specified aggregates according to actual needs is time-consuming and laborious, which makes the efficiency of construction activities relatively low. Summary of the invention

[0003] The purpose of the present invention is to provide a building-type equipment that is conducive to centralized control when producing sand and gravel aggregates of various specifications. To this end, the present invention adopts the following technical solutions:

[0004] A building-type equipment for producing various types of sand and gravel aggregates, comprising a multi-layered building-type structure, wherein the shaping of sand and gravel aggregates of various specifications and the collection of finished products are integrated and distributed, wherein a first buffer bin for receiving sand and gravel aggregates is arranged on the top of the building-type structure, and the sand and gravel aggregates are led from the outside of the building-type structure (12) to the area where they are located for top-down gravity conveying; wherein a first screening device is arranged at the outlet of the first buffer bin, and a second screening device for receiving the screened materials is arranged below the first screening device, wherein a medium-fine crushing device for closed-circuit circulation with the upper part of the screened materials of the first screening device is arranged inside the building-type structure, and a shaping sand-making device for closed-circuit circulation with the part of the screened materials of the second screening device is also arranged inside the building-type structure, and a water-washing sand device for receiving the screened materials of the second screening device is arranged below the second screening device; and wherein a finished product collection pile for receiving sand and gravel aggregates is arranged inside the building-type structure, and the finished product collection pile is arranged at the lower outlets of the first screening device and the second screening device, and at the same outlet of the water-washing sand device.

[0005] Furthermore: the first screening device is equipped with two layers of screens, and the sand and gravel aggregates are screened by the first screening device to form a first finished material pile and a second finished material pile respectively; the second screening device is equipped with three layers of screens, and the sand and gravel aggregates are screened by the second screening device to form a third finished material pile, a fourth finished material pile and a fifth finished material pile; the sand and gravel aggregates are screened by the water-washed sand equipment to form a machine-made sand pile.

[0006] Furthermore: a feeding and coarse crushing device is arranged outside the building structure, and a first material conveying device is arranged between the feeding and coarse crushing device and the inlet of the first buffer bin.

[0007] Furthermore, the medium and fine crushing device includes a second buffer bin and medium and fine crushing equipment arranged from top to bottom, the second buffer bin and the fine crushing equipment are arranged on different floors in the building structure, and a first feeding device is arranged between the second buffer bin and the fine crushing equipment.

[0008] Furthermore: a first lifting device is arranged between the discharge port at the bottom of the medium and fine crushing device and the feed port of the first screening device.

[0009] Furthermore: the shaping sand making device includes a third buffer bin and a shaping sand making equipment arranged from top to bottom, the third buffer bin and the shaping sand making equipment are arranged on different floors in the building structure, and a second feeding equipment is connected between the third buffer bin and the shaping sand making equipment.

[0010] Furthermore: a second lifting device is arranged between the discharge port of the shaping sand making device and the feed port of the second screening device.

[0011] Furthermore: a dust collecting device is arranged in the building structure, and the dust collecting device includes dust collecting equipment connected to each device and unloading point through a dust collecting pipeline, and an ash storage mechanism and an output ash powder conveying device are arranged below the dust collecting device.

[0012] Furthermore: water treatment equipment connected to the water-washing sand equipment is arranged outside the building structure, and the water treatment equipment includes a water collection tank, a filter press, a clean water tank and a high-level water tank which are connected in sequence, and a dosing room for dosing treatment is arranged between the water collection tank and the filter press.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention transports sand and gravel aggregates to the building structure through the first material conveying device, and meets the aggregate specification requirements for multi-graded concrete actually produced through various equipment and finished material piles in the building structure. The freely falling sand and gravel aggregates are screened by the first and second screening devices, and the sand and gravel aggregates are intercepted and re-screened by the lifting equipment at the same time, so as to obtain finished material piles of required specifications by reciprocating. The finished material piles are arranged near the discharge ports at corresponding positions to reduce the arrangement requirements of other material guiding equipment. In addition, the present invention is beneficial to saving land, reducing energy consumption, and facilitating centralized control by bringing various equipment together. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0016] Figure 2 It is a side view structural schematic diagram of the present invention;

[0017] Figure 3It is a schematic diagram of the production process of the present invention.

[0018] The symbols in the accompanying drawings are: feeding and coarse crushing device 1, first material conveying device 2, first screening device 3, first buffer bin 31, medium and fine crushing device 4, second buffer bin 41, first feeding equipment 42, medium and fine crushing equipment 43, first lifting equipment 5, second screening device 6, shaping sand making device 7, second feeding equipment 72, third buffer bin 71, shaping sand making equipment 73, second lifting equipment 8, water-washing sand equipment 9, fourth buffer bin 91, dust collecting device 10, dust collecting equipment 1001, Ash storage mechanism 1002, ash powder conveying device 1003, material chute 11, building structure 12, water treatment equipment 13, water collection tank 131, dosing room 132, filter press 133, clean water tank 134, high-level water tank 135, make-up water 136, finished material conveying device 14, first finished material pile 15, third finished material pile 16, fourth finished material pile 18, fifth finished material pile 19, second finished material pile 20, machine-made sand material pile 17, dump truck 102, hopper 103. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0020] like Figure 1-3 As shown, a building-type equipment for producing various sand and gravel aggregates includes a multi-layered building-type structure 12, in which the forming of sand and gravel aggregates of various specifications and the collection of finished materials are integrated and distributed, thereby concentrating the crushing, screening, sand washing, dust collection and ash conveying systems required for the entire production of sand and gravel aggregates within an overall building-type steel structure frame for corresponding operation area division, thereby realizing the highly integrated production of various sand and gravel aggregates at the same time; a first buffer bin 31 for receiving sand and gravel aggregates is arranged on the top floor of the building-type structure 12, and the sand and gravel aggregates are led from the outside of the building-type structure 12 to the area where they are located for top-down gravity conveying operations; the building-type structure A first screening device 3 is arranged at the outlet of the first buffer bin 31, a second screening device 6 for receiving the screened material is arranged at the lower level of the first screening device 3, a medium and fine crushing device 4 for closed-loop circulation with the upper part of the screened material of the first screening device 3 is arranged in the building structure 12, a shaping sand making device 7 for closed-loop circulation with part of the screened material of the second screening device 6 is also arranged in the building structure 12, a water-washing sand equipment 9 for receiving the screened material of the second screening device 6 is arranged at the lower level; a finished product collection pile for receiving sand and gravel aggregates is arranged nearby inside the building structure 12, and the finished product collection piles are respectively arranged at the lower level outlets of the first screening device 3 and the second screening device 6, and the same level outlet of the water-washing sand equipment 9.

[0021] Among them, a finished material conveying device 14 and a material chute 11 for conveying sand and gravel aggregates are set in the building structure 12. The sand and gravel aggregates are delivered to various equipment locations through the material chute 11, and the sand and gravel aggregates that meet the specification requirements are transported to the finished material pile of the target collection specification through the finished material conveying device 14.

[0022] In this embodiment, the first material conveying device 2 and the finished material conveying device 14 both use belt conveyors, and the finished material conveying device 14 that conveys to the third finished material pile 16, the fourth finished material pile 18, and the machine-made sand pile 17 can also use a chain conveyor or a screw conveyor.

[0023] Specifically, a feeding and coarse crushing device 1 is arranged outside the building structure 12, and a first material conveying device 2 is arranged between the feeding and coarse crushing device 1 and the inlet of the first buffer bin 31. The feeding and coarse crushing device 1 includes a feeding and coarse crushing device 101 arranged above the first material conveying device 2, and a discharge hopper 103 is arranged at the feed inlet of the feeding and coarse crushing device 101. The material coarsely crushed by the feeding and coarse crushing device 1 is sent to the first buffer bin 31 in front of the first screening device 3 through the first material conveying device 2.

[0024] Specifically, the first screening device 3 is equipped with two layers of screens, including two layers of vibrating screens from top to bottom, and the sand and gravel aggregates are respectively formed into a first finished product pile 15 and a second finished product pile 20 through the vibrating screen of the first screening device 3. Among them, the screened material of the first layer of screens of the first screening device 3 is sent to the medium and fine crushing device 4, the screened material of the second layer of screens of the first screening device 3 can be sent to the medium and fine crushing device 4, the first finished product pile 15, and the second finished product pile 20, respectively, and the screened material of the second layer of screens of the first screening device 3 can be sent to the second screening device 6 and the first finished product pile 15 respectively; the material crushed by the medium and fine crushing device 4 is returned to the first screening device 3 through the first lifting device 5, and the material quantity from the first screening device 3 to the medium and fine crushing device 4 and the second finished product pile 20 and the first finished product pile 15 can be adjusted according to actual needs.

[0025] In this embodiment, the aperture of the first screen layer of the first screening device 3 is 80 mm, and the aperture of the second screen layer of the first screening device 3 is 40 mm. Accordingly, the first finished product pile 15 (i.e., the cushion layer pile) contains sand and gravel aggregates with a particle size of 0-80 mm, and the second finished product pile 20 contains sand and gravel aggregates with a particle size of 40-80 mm.

[0026] At the same time, the second screening device 6 is equipped with three layers of screens, including three layers of vibrating screens from top to bottom. The sand and gravel aggregates are screened by the vibrating screen of the second screening device 6 to form a third finished material pile 16, a fourth finished material pile 18 and a fifth finished material pile 19; the sand and gravel aggregates are screened by the water-washed sand equipment 9 to form a machine-made sand pile 17, and the machine-made sand screened by the screen equipped with the second screening device 6 is used as a supplement to adjust the grading. Among them, the screened material of the first layer of the second screening device 6 can be sent to the shaping sand making device 7 and the fifth finished product pile 19 respectively, the screened material of the second layer of the second screening device 6 can be sent to the shaping sand making device 7 and the third finished product pile 16 respectively, and the screened material of the third layer of the second screening device 6 can be sent to the shaping sand making device 7 and the fourth finished product pile 18 respectively. The material after shaping and making by the shaping sand making device 7 is returned to the second screening device 6 through the second lifting device 8. The amount of material from the second screening device 6 to the shaping sand making device 7 and each finished product pile can be adjusted according to actual needs. The screened material of the third layer of the second screening device 6 is sent to the water-washing sand device 9, and the machine-made sand after washing is sent to the machine-made sand pile 17.

[0027] In this embodiment, the aperture of the first layer of the second screening device 6 is 20 mm, the aperture of the second layer of the second screening device 6 is 15 mm, and the aperture of the third layer of the second screening device 6 is 5 mm. Accordingly, the fifth finished product pile 19 contains sand and gravel aggregates with a particle size of 20-40 mm, the fourth finished product pile 18 contains sand and gravel aggregates with a particle size of 5-15 mm, and the third finished product pile 16 contains sand and gravel aggregates with a particle size of 5-20 mm.

[0028] At the same time, the first screening device 3, the second screening device 6, the medium and fine crushing device 4, the shaping sand making device 7, the water-washing sand equipment 9, the dust collecting device 10 or the dust suppression device (not shown in the figure) are all arranged in the same building structure 12, so that all the equipment that is easy to generate dust can be concentrated together, reducing the use area of ​​the ground space outside the building structure 12, and the dust caused by production will also be concentrated in the vicinity of the building structure 12. The building structure 12 adopts a detachable steel frame structure, and the medium and fine crushing device 4, the first lifting device 5, the first screening device 3, the second screening device 6, the shaping sand making device 7, the second lifting device 8, the water-washing sand equipment 9, the dust collecting device 10, the dust suppression device and the building structure 12 can be detachably spliced ​​and combined together. All the equipment and the steel platform, and the chutes between the equipment and the equipment are bolted, which can be disassembled and moved to another project, and put into use again through assembly. In this way, the rapid disassembly and repeated use of the building equipment can be achieved, which can also save costs.

[0029] Specifically, the water-washing sand equipment 9 can adopt a wheel-type integrated sand washing machine, or a combination of "spiral sand washing machine + dewatering screen". In this embodiment, the water-washing sand equipment 9 adopts a wheel-type integrated sand washing machine. The water used for sand washing in the water-washing sand equipment 9 is recycled through the water treatment equipment 13. The cleaning water for sand washing is sprayed from the top of the water-washing sand equipment 9 (when a wheel-type integrated sand washing machine is adopted) to allow the slurry to enter the sand washing tank for hydraulic classification, and the coarse particles are settled and the fine particles are discharged from the overflow. The bucket wheel loosens the bottom material on the one hand to stir out the mixed fine mud, and on the other hand, the sand is scooped out to complete the entire sand washing process.

[0030] Specifically, a water treatment device 13 connected to the water-washing sand equipment 9 is arranged outside the building structure 12, and the water treatment device 13 forms a water circulation for the water-washing sand equipment 9; the water treatment device 13 includes a water collection tank 131, a filter press 133, a clean water tank 134 and a high-level water tank 135 which are connected in sequence, and a dosing room 132 for dosing treatment is arranged between the water collection tank 131 and the filter press 133. After passing through the pipeline, the wastewater enters the water collection tank 131 of the water treatment equipment 13, and the water in the water collection tank 131 is treated by dosing in the dosing room 132, and then filtered by the filter press 133, and the waste is transported to the waste dump for stacking, and the filtered water is sent to the clean water tank 134, and the clean water in the clean water tank 134 is sent back to the high-level water tank 135 for use. When the clean water in the high-level water tank 135 is insufficient, it can be supplemented with supplementary water 136.

[0031] Specifically, the shaping sand making device 7 includes a third buffer bin 71 and a shaping sand making device 73 arranged from top to bottom, the third buffer bin 71 and the shaping sand making device 73 are arranged on different floors in the building structure 12, and a second feeding device 72 is arranged between the third buffer bin 71 and the shaping sand making device 73. Among them, a second lifting device 8 is arranged between the discharge port of the shaping sand making device 7 and the feed port of the second screening device 6.

[0032] In this embodiment, the first lifting device 5 and the second lifting device 8 are bucket elevators.

[0033] Specifically, a dust collecting device 10 is provided in the building structure 12. By equipping the dust collecting device 10 and the dust suppression device, the environmental requirements of the production process can be guaranteed. The dust collecting device 10 includes a dust collecting device 1001 which is connected to each device and the unloading point through a dust collecting pipeline, and an ash storage mechanism 1002 and an output ash powder conveying device 1003 which are sequentially connected and arranged below the dust collecting device 1001. Among them, the dust from each device and the unloading point is connected to the dust collecting device 1001 through a dust collecting pipeline, and the collected dust returns to the ash storage mechanism 1002, and is transported to other use systems (the use system can be a concrete system) through the ash powder conveying device 1003. The ash powder conveying device 1003 can be a pipeline conveying, an air conveying chute, a belt conveyor, etc.

[0034] In this embodiment, the layered installation of each device in the building structure 12 is as follows: the shaping sand making device 7 and the water-washing sand equipment 9 are installed on the ground layer F0 inside the building structure 12; the medium and fine crushing equipment 43, the third buffer bin 71, the fourth buffer bin 91, and the ash conveying device 1003 are installed on the first layer F1 of the building structure 12; the second screening device 6, the second buffer bin 41, and the dust collecting device 1001 are installed on the second layer F2 of the building structure 12; the first screening device 3 is installed on the third layer F3 of the building structure 12; the dust suppression device is arranged on the bottom surface of the floor above each device; the feeding and coarse crushing device 1 and the first material conveying device 2 are installed on the ground or on the foundation platform; the first lifting device 5 and the second lifting device 8 are arranged on the ground layer F0 and the foundation of some equipment is arranged below the ground layer F0.

[0035] Correspondingly, the first finished product pile 15 and the second finished product pile 20 are arranged on the second floor F2 of the building structure 12, the machine-made sand pile 17 is arranged on the ground floor F0 of the building structure 12 (i.e., the discharge port position of the water-washing sand equipment 9), and the third finished product pile 16, the fourth finished product pile 18 and the fifth finished product pile 19 are arranged on the first floor F1 of the building structure 12.

[0036] See also Figure 1-3 When producing various sand and gravel aggregates in a building-type equipment, the specific production methods are as follows:

[0037] The mined raw material is transported to the hopper 103 by the unloading vehicle 102, and the raw material is transported to the feeding and coarse crushing device 1 (a rod feeder and a jaw crusher are integrated, and other crushing equipment can also be selected), and the coarsely crushed material is transported to the first buffer bin 31 in front of the first screening device 3 in the building structure through the first material conveying device 2, and the screened material of the first layer of screen of the first screening device 3 is sent to the second buffer bin 41 in front of the medium and fine crushing device 4 through the material chute 11, and the screened material of the second layer of screen of the first screening device 3 is divided into three parts: one part is sent to the first finished product pile 15 with a particle size of 0-80mm as a finished product through the material chute 11 and the finished product conveying device 14, one part is sent to the second finished product pile 20 with a particle size of 40-80mm as a finished product through the material chute 11 and the finished product conveying device 14, and the rest is sent to the second buffer bin 41 in front of the medium and fine crushing device 4 through the material chute 11, and then sent to the medium and fine crushing equipment 43. The medium and fine crushing equipment 43 adopts a cone crusher, and the crushed materials are sent to the first buffer bin 31 in front of the first screening device 3 through the first lifting device 5, and then sent back to the first screening device 3.

[0038] The screened material of the first screen of the second screening device 6 is divided into two parts: one part is sent to the fifth finished product pile 19 with a particle size of 20-40 mm through the material chute 11 and the finished product conveying device 14 as a finished product, and the rest is sent to the third buffer bin 71 in front of the shaping sand making device 7 through the material chute 11. The screened material of the second screen of the second screening device 6 is divided into two parts: one part is sent to the third finished product pile 16 with a particle size of 5-20 mm through the material chute 11 and the finished product conveying device 14 as a finished product, and the rest is sent to the third buffer bin 71 in front of the shaping sand making device 7 through the material chute 11. The sieve material of the third layer of screen 5 of the second screening device 6 is divided into two parts: one part is sent to the fourth finished product pile 18 with a particle size of 5-15mm through the material chute 11 and the finished product conveying device 14 as the finished product, and the rest is sent to the third buffer bin 71 in front of the shaping sand making device 7 through the material chute 11; the material with a particle size of 5-40mm in the third buffer bin 71 enters the shaping sand making device 73, and the shaping sand making device 73 adopts a vertical shaft impact crusher, and can also adopt other shaping sand making equipment such as a column mill or a column crusher, and the crushed material is returned to the inlet of the second screening device 6 through the second lifting device 8. The sieve material of the second screening device 6 can be sent to the water washing sand device 9, and the machine-made sand after water washing is sent to the machine-made sand material pile 17.

[0039] At the same time, the flow of each part can be controlled by adjusting the valve according to actual needs. In this way, the building-type equipment that can produce a variety of sand and gravel aggregates can meet the production of three-grade concrete aggregates, two-grade concrete aggregates, cushion materials, and shotcrete aggregates. Concrete aggregates can also only produce two-grade concrete aggregates.

[0040] The above embodiment is only a preferred technical solution of the present invention. Those skilled in the art should understand that the technical solutions or parameters in the embodiments can be modified or replaced without departing from the principle and essence of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A building-type equipment for producing various sand and gravel aggregates, characterized by: The invention comprises a multi-layered building structure (12), wherein the shaping of sand and gravel aggregates of various specifications and the collection of finished materials are integrated and distributed in the building structure (12); a first buffer bin (31) for receiving sand and gravel aggregates is arranged on the top layer of the building structure (12), and the sand and gravel aggregates are led from the outside of the building structure (12) to the area where the building structure (12) is located to be gravity-transported from top to bottom; a first screening device (3) is arranged at the outlet of the first buffer bin (31) of the building structure (12); a second screening device (6) for receiving the screened material is arranged at the lower layer of the first screening device (3); a medium-fine crushing device (4) for closed-circuiting with the upper part of the screened material of the first screening device (3) is arranged in the building structure (12); a shaping sand-making device (7) for closed-circuiting with the part of the screened material of the second screening device (6) is also arranged in the building structure (12); a water-washing sand device (9) for receiving the screened material is arranged at the lower layer of the second screening device (6); A finished product collection pile for receiving sand and gravel aggregates is arranged inside the building structure (12), and the finished product collection pile is respectively arranged at the lower layer outlets of the first screening device (3) and the second screening device (6), and the same layer outlet of the water-washing sand equipment (9).

2. The building-type equipment for producing various types of sand and gravel aggregates according to claim 1 is characterized in that: The first screening device (3) is equipped with two layers of screens, and the sand and gravel aggregates are screened by the first screening device (3) to form a first finished material pile (15) and a second finished material pile (20); the second screening device (6) is equipped with three layers of screens, and the sand and gravel aggregates are screened by the second screening device (6) to form a third finished material pile (16), a fourth finished material pile (18) and a fifth finished material pile (19); the sand and gravel aggregates are screened by the water-washed sand equipment (9) to form a machine-made sand material pile (17).

3. The building-type equipment for producing various types of sand and gravel aggregates according to claim 1 is characterized in that: A feeding and coarse crushing device (1) is arranged outside the building structure (12), and a first material conveying device (2) is arranged between the feeding and coarse crushing device (1) and the inlet of the first buffer bin (31).

4. The building-type equipment for producing various types of sand and gravel aggregates according to claim 1 is characterized in that: The medium and fine crushing device (4) comprises a second buffer bin (41) and a medium and fine crushing device (43) arranged from top to bottom. The second buffer bin (41) and the fine crushing device (43) are arranged on different floors in the building structure (12). A first feeding device (42) is arranged between the second buffer bin (41) and the fine crushing device (43).

5. The building-type equipment for producing various types of sand and gravel aggregates according to claim 1 is characterized in that: A first lifting device (5) is arranged between the discharge port at the bottom of the medium and fine crushing device (4) and the feed port of the first screening device (3).

6. The building-type equipment for producing various types of sand and gravel aggregates according to claim 1, characterized in that: The shaping sand making device (7) comprises a third buffer bin (71) and a shaping sand making device (73) arranged from top to bottom. The third buffer bin (71) and the shaping sand making device (73) are arranged on different floors in the building structure (12). A second feeding device (72) is arranged between the third buffer bin (71) and the shaping sand making device (73).

7. The building-type equipment for producing various types of sand and gravel aggregates according to claim 1 is characterized in that: A second lifting device (8) is arranged between the discharge port of the shaping sand making device (7) and the feed port of the second screening device (6).

8. The building-type equipment for producing various types of sand and gravel aggregates according to claim 1 is characterized in that: A dust collecting device (10) is arranged in the building structure (12), and the dust collecting device (10) includes a dust collecting device (1001) connected to various devices and unloading points through dust collecting pipes, and an ash storage mechanism (1002) and an output ash powder conveying device (1003) are arranged below the dust collecting device (1001).

9. The building-type equipment for producing various types of sand and gravel aggregates according to claim 1, characterized in that: A water treatment device (13) connected to the water-washing sand device (9) is arranged outside the building structure (12). The water treatment device (13) includes a water collection tank (131), a filter press (133), a clean water tank (134) and a high-level water tank (135) which are connected in sequence. A dosing room (132) for dosing treatment is arranged between the water collection tank (131) and the filter press (133).

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