Production system of ultra-high performance concrete

Abstract

The utility model discloses a production system of ultra-high performance concrete, relates to the technical field of concrete production, and is mainly used for solving a series of problems that the production of the existing ultra-high performance concrete has harsh requirements on the quality of raw materials, the mixing and dispersing difficulty of a mixture and slurry is high, the forming process is complicated and the like. The equipment mainly structurally comprises a dry-process crushing, shaping and grinding unit, a wet-process vertical stirring and grinding unit, a vacuum high-pressure forming unit and a product maintenance unit which are sequentially arranged, and further comprises a wastewater treatment and recycling unit of which the input end is connected with the vacuum high-pressure forming unit and the product maintenance unit, and the output end of the wastewater treatment and recycling unit is connected with the wet-process vertical stirring and grinding unit. The utility model provides a production system of ultra-high performance concrete, which has low requirements on quality performance of front-end raw materials and strong autonomous controllability in the production process, and produced ultra-high performance concrete products are high in density and good in performance.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete production, in particular to a production system for ultra-high performance concrete. Background Art

[0002] Ultra-high performance concrete and its products have excellent compressive strength, toughness, crack resistance, abrasion resistance and corrosion resistance, and have been widely recognized in major and key infrastructure construction fields such as road engineering, bridge engineering and protection engineering, and a series of demonstration applications have been carried out. Their service performance and durability are excellent, and they are considered to be the most important development direction of future concrete and cement products.

[0003] The design and manufacture of ultra-high performance concrete and its products are based on the principle of the closest packing of particles, which makes them exhibit characteristics similar to natural stones. However, this design principle also puts forward higher requirements for the raw materials and production processes of ultra-high performance concrete. The traditional design and production ideas of ultra-high performance concrete and its products mostly select quartz sand and quartz powder with excellent gradation and nearly spherical particles as aggregates and fillers, finer cement and fly ash as binders and fillers, ultra-fine silica fume as small hole fillers, and at the same time, it is necessary to select extremely low water consumption and a high dosage of high-performance admixtures. In addition, steel fibers are required as the reinforcement phase.

[0004] However, the raw materials of traditional ultra-high performance concrete and its products come from different raw material supply enterprises, and the particle sizes, particle shapes and uniformities of various raw materials are different. It is necessary to monitor the raw material performance frequently and in real time, and adjust the mix proportion according to the raw material performance frequently and in real time. At the same time, during the production process, due to too much powder content, low water consumption, and extremely difficult dispersion of ultra-fine silica fume and steel fibers, it is generally necessary to use a high-efficiency mixer for a long time to achieve the purpose of high uniformity of the slurry, which is time-consuming and laborious. In addition, due to the too high viscosity of the slurry, it is inevitable to introduce more air bubbles, resulting in a high porosity of the obtained products and a significant reduction in performance.

[0005] In view of this, it is necessary to start from the raw material processing end, and combine the processes of raw material crushing, shaping, grinding, and subsequent mixing, forming and curing to design a production system more suitable for ultra-high performance concrete products. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a production system for ultra-high performance concrete, which has low requirements for the quality performance of the front-end raw materials, strong independent controllability in the production process, and high density and good performance of the produced ultra-high performance concrete products.

[0007] The technical solution of the present utility model to solve the above technical problems is: A production system for ultra-high performance concrete, which includes a dry crushing, shaping and grinding unit, a wet vertical stirring and grinding unit, a vacuum high-pressure forming unit, and a product curing unit that are connected in series in sequence along the material conveying direction. It also includes a wastewater treatment and reuse unit with an input end connected to the vacuum high-pressure forming unit and the product curing unit, and the output end of the wastewater treatment and reuse unit is connected to the wet vertical stirring and grinding unit.

[0008] As a further improvement of the present utility model, the dry crushing, shaping and grinding unit includes a raw material storage bin, a belt scale, a belt conveyor, and a dry medium-free tube mill. The output end of the dry crushing, shaping and grinding unit is connected to the input end of the wet vertical stirring and grinding unit through a bucket elevator;

[0009] The wet vertical stirring and grinding unit includes a solid / liquid raw material storage device, a belt scale, a metering pump, and a vertical stirring mill. The output end of the wet vertical stirring and grinding unit is connected to the input end of the vacuum high-pressure forming unit through a stop valve A and a concrete pump;

[0010] The vacuum high-pressure forming unit includes a distributor, a closed-type vacuum high-pressure forming machine, and a vacuum pump. The output end of the closed-type vacuum high-pressure forming machine is connected to the input end of the product curing unit through a crawler conveyor. The wastewater outlet on the closed-type vacuum high-pressure forming machine is connected to the input end of the wastewater treatment and reuse unit through a stop valve B, a vacuum pump, a wastewater stop valve, and a wastewater pump A;

[0011] The product curing unit includes a track, a rail car, and an autoclave. The bottom of the autoclave is provided with a drain port, and the drain port is connected to the input end of the wastewater treatment and reuse unit through a stop valve C and a wastewater pump B;

[0012] The wastewater treatment and reuse unit includes a wastewater tank and a wastewater reflux pump. The wastewater outlet on the wastewater tank is connected to the wet vertical stirring and grinding unit through a stop valve D and a wastewater reflux pump.

[0013] As a further improvement of the present utility model, the raw material storage bin of the dry crushing, shaping and grinding unit includes a cobblestone bin, an aggregate bin, and a cement clinker bin that are arranged in parallel. The cobblestone bin, the aggregate bin, and the cement clinker bin are respectively connected to the corresponding cobblestone belt scale, aggregate belt scale, and cement clinker belt scale. The output ends of the cobblestone belt scale, the aggregate belt scale, and the cement clinker belt scale are connected to the input end of the dry medium-free tube mill through a belt conveyor. The discharging end of the dry medium-free tube mill is connected to the input end of the wet vertical stirring and grinding unit through a bucket elevator.

[0014] As a further improvement of the present utility model, a particle filter plate is further provided at the discharging end of the dry medium-free tube mill. The filter holes of the particle filter plate are circular, and the aperture is 5 mm.

[0015] As a further improvement of the present utility model, the solid / liquid raw material storage device of the wet vertical stirring and grinding unit includes a mixture bin, a steel fiber bin, a cement bin, a fly ash bin, a silica fume bin, an admixture tank and a water tank which are arranged in parallel and connected to the output end of the bucket elevator.

[0016] As a further improvement of the present utility model, the output ends of the mixture bin, the steel fiber bin, the cement bin, the fly ash bin, the silica fume bin, the admixture tank and the water tank are respectively connected to the feed inlet of the vertical stirring mill through corresponding mixture belt scales, steel fiber belt scales, cement powder pumps, fly ash powder pumps, silica fume powder pumps, admixture pumps and water pumps.

[0017] As a further improvement of the present utility model, a stirring shaft with steel bars is arranged in the vertical stirring mill, and the output end of the vertical stirring mill is connected to the input end of the vacuum high-pressure forming unit through a stop valve A and a concrete pump.

[0018] As a further improvement of the present utility model, the waste water tank is connected to a waste water pump A and a waste water pump B through a waste water inlet, and the outlet end of the waste water tank is connected to the water tank of the wet vertical stirring and grinding unit through a waste water reflux pump.

[0019] As a further improvement of the present utility model, the vacuum high-pressure forming unit includes a distributor connected to the concrete pump, the distributor is connected to a closed-type vacuum high-pressure forming machine, and the closed-type vacuum high-pressure forming machine is provided with a hydraulic shaft, a pressing head plate connected to the hydraulic shaft and a bearing bottom plate.

[0020] As a further improvement of the present utility model, one end of the autoclave is connected with a steam pipeline and a pressure relief valve, and a barometer and a thermometer are also arranged on the autoclave.

[0021] Beneficial effects

[0022] Compared with the prior art, the advantages of a production system for ultra-high performance concrete of the present utility model are as follows:

[0023] This system integrates the entire production process of ultra-high performance concrete products, such as raw material processing, slurry preparation and optimization, product forming, product curing and waste water treatment and recycling. The performance of the products is easier to control independently, rather than relying on the quality performance control of purchased raw materials.

[0024] The core equipment of the dry crushing, shaping and grinding unit is a dry medium-free tubular mill. This device abandons the fixed grinding parts of traditional sand making machines and grinding media such as steel balls / steel segments of tubular mills, and uses pebbles as grinding media. Pebbles have good wear resistance and a lower density compared to steel balls / steel segments. Their impact crushing effect is weak, but their grinding effect is better, which is beneficial to the shaping of fine particles of aggregates and clinkers, improving the sphericity of aggregate and clinker particles, and thus further enhancing the packing density of particles.

[0025] The core equipment of the wet vertical stirring and grinding unit adopts a vertical stirring mill. Its stirring shaft drives the steel bars to rotate at high speed, thereby driving the movement of each particle, which can fully disperse the agglomerates, disperse the particles, and refine the particles through mutual friction. This will greatly improve the dispersibility and particle distribution uniformity of the particles in the slurry, and further refine and spheroidize the particles.

[0026] The slurry forming adopts the vacuum high-pressure forming method. During the pressing and forming process, the vacuum effect will extract the air and excess water introduced into the slurry, so that the pore content in the formed body and the capillary pores introduced by excessive water can be reduced. This will greatly improve the density of the product, thereby improving the mechanical properties and durability of the product.

[0027] Through the following description and in combination with the attached drawings, the present utility model will become clearer. These drawings are used to explain the embodiments of the present utility model. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the attached drawings required for the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a structural schematic diagram of the present utility model;

[0030] Figure 2 It is a structural schematic diagram of the dry crushing, shaping and grinding unit;

[0031] Figure 3 It is a structural schematic diagram of the wet vertical stirring and grinding unit;

[0032] Figure 4 It is a structural schematic diagram of the vacuum high-pressure forming unit;

[0033] Figure 5 It is a structural schematic diagram of the product curing unit;

[0034] Figure 6 It is a structural schematic diagram of the wastewater treatment and reuse unit.

[0035] Wherein: 100 - dry crushing, shaping and grinding unit; 101 - cobblestone bin; 102 - cobblestone belt scale; 103 - aggregate bin; 104 - aggregate belt scale; 105 - cement clinker bin; 106 - cement clinker belt scale; 107 - belt conveyor; 108 - dry medium-free tubular mill; 109 - particle filter plate; 110 - bucket elevator;

[0036] 200 - Wet vertical stirring and grinding unit; 201 - Mixing material bin; 202 - Mixing material belt weigher; 203 - Steel fiber bin; 204 - Steel fiber belt weigher; 205 - Cement silo; 206 - Cement powder pump; 207 - Fly ash silo; 208 - Fly ash powder pump; 209 - Silica fume silo; 210 - Silica fume powder pump; 211 - Admixture tank; 212 - Admixture pump; 213 - Water tank; 214 - Water pump; 215 - Feed inlet; 216 - Vertical stirring mill; 217 - Stirring shaft; 218 - Steel rod; 219 - Stop valve A; 220 - Concrete pump

[0037] 300 - Vacuum high - pressure forming unit; 301 - Distributor; 302 - Hydraulic shaft; 303 - Pressing head plate; 304 - Bearing bottom plate; 305 - Closed - type vacuum high - pressure forming machine; 306 - Stop valve B; 307 - Vacuum pump; 308 - Waste water stop valve; 309 - Waste water pump A; 310 - Crawler conveyor

[0038] 400 - Product curing unit; 401 - Track; 402 - Rail car; 403 - Autoclave; 404 - Steam pipeline; 405 - Pressure relief valve; 406 - Barometer; 407 - Thermometer; 408 - Drain outlet; 409 - Stop valve C; 410 - Waste water pump B

[0039] 500 - Waste water treatment and reuse unit; 501 - Waste water inlet; 502 - Waste water tank; 503 - Stop valve D; 504 - Waste water reflux pump Detailed implementation mode

[0040] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the attached drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model

[0041] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances

[0042] Now refer to the attached drawings to describe the embodiments of the present utility model

[0043] Embodiment

[0044] The specific implementation manner of the present utility model is as follows Figures 1-6 shown. A production system for ultra-high performance concrete includes a dry crushing, shaping and grinding unit 100, a wet vertical stirring and grinding unit 200, a vacuum high-pressure forming unit 300, and a product curing unit 400, which are sequentially connected in series along the material conveying direction. At the same time, the system further includes a wastewater treatment and reuse unit 500, the input end of which is connected to the vacuum high-pressure forming unit 300 and the product curing unit 400, and the output end of the wastewater treatment and reuse unit 500 is connected to the wet vertical stirring and grinding unit 200. In this embodiment, each unit is also respectively provided with supporting storage, metering and conveying devices, and the units are connected through valves and corresponding conveying equipment.

[0045] This system integrates the entire production process of ultra-high performance concrete products, such as raw material processing, slurry preparation and optimization, product forming, product curing, and wastewater treatment and reuse. The performance of the products is easier to independently control and does not depend on the quality performance control of purchased raw materials.

[0046] Among them, as Figure 2 shown, the dry crushing, shaping and grinding unit 100 includes a raw material storage bin, a belt scale, a belt conveyor 107, and a dry medium-free tubular mill 108. The output end of the dry crushing, shaping and grinding unit 100 is connected to the input end of the wet vertical stirring and grinding unit 200 through a bucket elevator 110, that is, the qualified mixture prepared by the dry crushing, shaping and grinding unit 100 is sent to the wet vertical stirring and grinding unit 200 through the bucket elevator 110.

[0047] In this embodiment, the raw material storage bin of the dry crushing, shaping and grinding unit 100 includes a cobblestone bin 101, an aggregate bin 103, and a cement clinker bin 105 arranged in parallel. The cobblestone bin 101, the aggregate bin 103, and the cement clinker bin 105 are respectively connected to the corresponding cobblestone belt scale 102, aggregate belt scale 104, and cement clinker belt scale 106 in one-to-one correspondence. And the output ends of the cobblestone belt scale 102, the aggregate belt scale 104, and the cement clinker belt scale 106 are connected to the input end of the dry medium-free tubular mill 108 through the belt conveyor 107. After various materials are metered, they are sent to the dry medium-free tubular mill 108 for processing through the belt conveyor 107. The discharge end of the dry medium-free tubular mill 108 is connected to the input end of the wet vertical stirring and grinding unit 200 through the bucket elevator 110.

[0048] The cobblestones are natural and unprocessed near-spherical or ellipsoidal bodies with a particle size of 10 mm - 30 mm; in a preferred embodiment, the cobblestones have a continuous gradation and an average particle size of 20 mm. The aggregate can be any continuously graded ore with a particle size of less than 10 mm, such as limestone ore and granite ore. The cement clinker is a silicate cement clinker particle with a particle size of less than 5 mm.

[0049] At the discharge end of the dry medium-free tube mill 108, a particle filter plate 109 is also provided. The filter holes of the particle filter plate 109 are circular, and the hole diameter is 5 mm. Particles that are nearly circular and have a diameter less than 5 mm pass through the filter holes and are sent to the wet vertical stirring and grinding unit 200 by the bucket elevator 110. Among them, due to the large particle size and high wear resistance of the cobblestones, the prepared mixture basically does not contain cobblestone components.

[0050] The core equipment of the dry crushing, shaping and grinding unit 100 is the dry medium-free tube mill 108. This device abandons the fixed grinding parts of traditional sand making machines and grinding media such as steel balls / steel segments in tube mills, and uses cobblestones as grinding media. Cobblestones have good wear resistance and a lower density compared to steel balls / steel segments. Their impact crushing effect is weak, but the grinding effect is better, which is beneficial to the shaping of fine particles of aggregates and clinkers, improving the sphericity of aggregate and clinker particles, and thus further enhancing the particle packing density.

[0051] Regarding the wet vertical stirring and grinding unit 200, as Figure 3 shown, this unit includes a solid / liquid raw material storage device, a belt scale, a metering pump, and a vertical stirring mill 216. The output end of the wet vertical stirring and grinding unit 200 is connected to the input end of the vacuum high-pressure forming unit 300 through a stop valve A219 and a concrete pump 220. The qualified slurry prepared by the wet vertical stirring and grinding unit 200 is sent to the vacuum high-pressure forming unit 300 through the stop valve A219 and the concrete pump 220.

[0052] In this embodiment, the solid / liquid raw material storage device of the wet vertical stirring and grinding unit 200 includes a mixture bin 201, a steel fiber bin 203, a cement bin 205, a fly ash bin 207, a silica fume bin 209, an admixture tank 211, and a water tank 213, which are arranged in parallel and connected to the output end of the bucket elevator 110. The output ends of the mixture bin 201, the steel fiber bin 203, the cement bin 205, the fly ash bin 207, the silica fume bin 209, the admixture tank 211, and the water tank 213 are respectively connected to the feed inlet 215 of the vertical stirring mill 216 through corresponding mixture belt scales 202, steel fiber belt scales 204, cement powder pumps 206, fly ash powder pumps 208, silica fume powder pumps 210, admixture pumps 212, and water pumps 214, so as to directly send the metered materials into the vertical stirring mill 216 for processing.

[0053] Meanwhile, a stirring shaft 217 with steel bars 218 is provided inside the vertical stirring mill 216. The output end of the vertical stirring mill 216 is connected to the input end of the vacuum high-pressure forming unit 300 through a stop valve A219 and a concrete pump 220. The stirring shaft 217 can rotate at a set rate driven by a motor, thereby driving the steel bars 218 to further break, disperse, grind, disperse, and uniformly mix the materials. When the vertical stirring mill 216 operates for a set time, the qualified stop valve A219 and concrete pump 220 are sent to the vacuum high-pressure forming unit 300.

[0054] The core equipment of the wet vertical stirring and grinding unit 200 uses a vertical stirring mill 216, whose stirring shaft drives the steel bars 218 to rotate at high speed, thereby driving the movement of each particle, which can fully play the role of breaking up agglomerates, dispersing particles, and refining particles through mutual friction between particles. This will greatly improve the dispersibility and uniformity of particle distribution in the slurry, and further refine and spheroidize the particles.

[0055] Regarding the vacuum high-pressure forming unit 300, as Figure 4 shown, this unit includes a distributor 301, a closed vacuum high-pressure forming machine 305, and a vacuum pump 307. Among them, the output end of the closed vacuum high-pressure forming machine 305 is connected to the input end of the product curing unit 400 through a crawler conveyor 310. The ultra-high performance concrete products produced by the closed vacuum high-pressure forming machine 305 are sent to the product curing unit through the crawler conveyor 310. At the same time, the waste water outlet on the closed vacuum high-pressure forming machine 305 is connected to the input end of the waste water treatment and reuse unit 500 through a stop valve B306, a vacuum pump 307, a waste water stop valve 308, and a waste water pump A309. The waste water generated during the operation of the closed vacuum high-pressure forming machine 305 is pumped out by the vacuum pump 307 through the stop valve B306, and the pumped waste water is sent to the waste water treatment and reuse unit 500 by the waste water pump A309 through the waste water stop valve 308.

[0056] In this embodiment, the vacuum high-pressure forming unit 300 includes a distributor 301 connected to the concrete pump 220. The distributor 301 is connected to the closed vacuum high-pressure forming machine 305. The closed vacuum high-pressure forming machine 305 is provided with a hydraulic shaft 302, a pressure head plate 303 connected to the hydraulic shaft 302, and a bearing bottom plate 30. The closed vacuum high-pressure forming machine 305 is also connected to the vacuum pump 307 through the stop valve 306, and the system vacuum degree during the operation of the closed vacuum high-pressure forming machine 305 is less than -0.1 Mpa.

[0057] The slurry forming adopts the vacuum high-pressure forming method. During the pressing forming, the vacuum action will extract the air and excess moisture introduced into the slurry, so that the pore content in the low-formed body and the capillary pores introduced by excessive water can be reduced. This will greatly improve the density of the product, thereby improving the mechanical properties and durability of the product.

[0058] Regarding the product curing unit 400, as Figure 5 shown, this unit includes a track 401, a rail car 402, and an autoclave 403. After curing, the ultra-high performance concrete products are transported by the rail car 402 through the track 401 to the corresponding finished product yard. Moreover, a drain port 408 is provided at the bottom of the autoclave 403. The drain port 408 is connected to the input end of the wastewater treatment and reuse unit 500 through a stop valve C409 and a wastewater pump B410. The steam condensate wastewater in the autoclave 403 is discharged through the drain port 408 and sent to the wastewater treatment and reuse unit 500 by the wastewater pump B410 through the stop valve C409.

[0059] In this embodiment, the product curing unit 400 is connected to the vacuum high-pressure forming unit 300 through a crawler conveyor 310. Moreover, a steam pipe 404 and a pressure relief valve 405 are connected to one end of the autoclave 403. It should be noted that the pressure relief valve 405 is a stop valve. A barometer 406 and a thermometer 407 are also provided on the autoclave 403. Among them, the steam is industrial steam. The operating conditions of the autoclave can be 100 °C - 180 °C, and the pressure inside the autoclave can be atmospheric pressure - 1.8 Mpa.

[0060] Regarding the wastewater treatment and reuse unit 500, as Figure 6 shown, this unit includes a wastewater tank 502 and a wastewater return pump 504. The wastewater outlet on the wastewater tank 502 is connected to the wet vertical stirring and grinding unit 200 through a stop valve D503 and a wastewater return pump 504, that is, the wastewater in the wastewater tank 502 is sent to the wet vertical stirring and grinding unit 200 for reuse by the wastewater return pump 504 through the stop valve D503.

[0061] In this embodiment, the wastewater tank 502 is connected to the wastewater pump A309 and the wastewater pump B410 through a wastewater inlet 501 to collect wastewater. At the same time, the outlet end of the wastewater tank 502 is connected to the water tank 213 of the wet vertical stirring and grinding unit 200 through a wastewater return pump 504.

[0062] In addition, regarding the specific usage method of this system, it is as follows:

[0063] S1. Start the dry crushing, shaping, and grinding unit 100. According to the design requirements, the cobblestones, aggregates, and clinkers in the raw material storage bin are respectively metered by the corresponding belt scales and then sent to the belt conveyor 107 first; then, the belt conveyor 107 sends the materials into the dry medium-free tubular mill 108 for processing, and the processing time is not less than 30 minutes; after that, the materials pass through the particle filter plate 109 to become qualified mixed materials, and the qualified mixed materials are sent to the mixed material bin through the bucket elevator 110.

[0064] S2. Start the wet vertical stirring and grinding unit 200. According to the mix ratio design, after the mixture, steel fibers, cement, fly ash, silica fume, admixtures, and water in the solid / liquid raw material storage device are metered respectively, they are first input into the vertical stirring mill 216. Then, after the vertical stirring mill 216 operates for no less than 30 minutes, open the stop valve A219 and the concrete pump 220, and send the slurry to the distributor 301 in the vacuum high-pressure forming unit 300.

[0065] S3. Start the vacuum high-pressure forming unit 300. First, spread the qualified slurry through the distributor 301 of the vacuum high-pressure forming unit 300 to cover the mold placed on the pressure-bearing bottom plate 304. Then, start the closed-type vacuum high-pressure forming machine 305, and the hydraulic shaft 302 drives the pressure head plate 303 to compress the slurry in the mold downward to the set displacement. At the same time, open the stop valve B306 and start the vacuum pump 307 to make the system reach the set vacuum degree, keep it for 30 seconds and then relieve the pressure, and close the stop valve B306 and the vacuum pump 307. After that, the formed product is conveyed by the track conveyor 310 to the track car 402 in the product curing unit 400. Finally, open the waste water valve A309 and convey the waste water pumped out by the vacuum pump 307 to the waste water tank 502.

[0066] S4. Start the product curing unit 400. First, the track car 402 and the product placed therein are sent into the autoclave 403 through the track by the track car 402. Then, close the autoclave 403, open the stop valve C409, and steam is filled into the autoclave 403 through the steam pipeline 404 to make the inside of the autoclave 403 reach the set temperature and pressure, and start curing. After that, after reaching the set curing time, close the stop valve C409, stop inputting steam, and at the same time open the pressure relief valve 405 to cool down. After reaching room temperature and normal atmospheric pressure, open the autoclave 403. Finally, transport the track car 402 and the product placed therein to the finished product yard through the track 401. At this time, start to open the drain port 408 and the stop valve C409 at the drain port 408, and use the waste water pump B410 to convey the condensed waste water to the waste water tank 502.

[0067] S5. When the waste water collected in the waste water tank 502 reaches the set volume, open the stop valve D503 and the waste water reflux pump 504, and convey the waste water to the water tank 213 for reuse.

[0068] The above describes the present invention in combination with the best embodiments, but the present invention is not limited to the disclosed embodiments above, and should cover various modifications and equivalent combinations made according to the essence of the present invention.

Claims

1. A production system for ultra-high performance concrete, characterized in that, It includes a dry crushing, shaping and grinding unit (100), a wet vertical stirring and grinding unit (200), a vacuum high-pressure forming unit (300), and a product curing unit (400) that are sequentially connected in series along the material conveying direction. It also includes a wastewater treatment and recycling unit (500) with one input end connected to the vacuum high-pressure forming unit (300) and the product curing unit (400). The output end of the wastewater treatment and recycling unit (500) is connected to the wet vertical stirring and grinding unit (200).

2. The production system of ultra-high performance concrete according to claim 1, characterized in that, The dry crushing, shaping and grinding unit (100) includes a raw material storage bin, a belt scale, a belt conveyor (107), and a dry medium-free tube mill (108). The output end of the dry crushing, shaping and grinding unit (100) is connected to the input end of the wet vertical stirring and grinding unit (200) through a bucket elevator (110). The wet vertical stirring and grinding unit (200) includes a solid / liquid raw material storage device, a belt scale, a metering pump, and a vertical stirring mill (216). The output end of the wet vertical stirring and grinding unit (200) is connected to the input end of the vacuum high-pressure forming unit (300) through a stop valve A (219) and a concrete pump (220). The vacuum high-pressure forming unit (300) includes a distributor (301), a closed vacuum high-pressure forming machine (305), and a vacuum pump (307). The output end of the closed vacuum high-pressure forming machine (305) is connected to the input end of the product curing unit (400) through a crawler conveyor (310). The wastewater outlet on the closed vacuum high-pressure forming machine (305) is connected to the input end of the wastewater treatment and recycling unit (500) through a stop valve B (306), a vacuum pump (307), a wastewater stop valve (308), and a wastewater pump A (309). The product curing unit (400) includes a track (401), a rail car (402), and an autoclave (403). The bottom of the autoclave (403) is provided with a drain port (408). The drain port (408) is connected to the input end of the wastewater treatment and recycling unit (500) through a stop valve C (409) and a wastewater pump B (410). The wastewater treatment and recycling unit (500) includes a wastewater tank (502) and a wastewater return pump (504). The wastewater outlet on the wastewater tank (502) is connected to the wet vertical stirring and grinding unit (200) through a stop valve D (503) and a wastewater return pump (504).

3. The production system of ultra-high performance concrete according to claim 2, characterized in that, The raw material storage bin of the dry crushing, shaping and grinding unit (100) includes a cobblestone bin (101), an aggregate bin (103) and a cement clinker bin (105) arranged in parallel. The cobblestone bin (101), the aggregate bin (103) and the cement clinker bin (105) are respectively connected to corresponding cobblestone belt scales (102), aggregate belt scales (104) and cement clinker belt scales (106). The output ends of the cobblestone belt scale (102), the aggregate belt scale (104) and the cement clinker belt scale (106) are connected to the input end of a dry medium-free tube mill (108) through a belt conveyor (107). The discharging end of the dry medium-free tube mill (108) is connected to the input end of a wet vertical stirring and grinding unit (200) through a bucket elevator (110).

4. The production system of ultra-high performance concrete according to claim 3, characterized in that, A particle filter plate (109) is also provided at the discharging end of the dry medium-free tube mill (108). The filter holes of the particle filter plate (109) are circular, and the hole diameter is 5 mm.

5. The production system of ultra-high performance concrete according to claim 2, characterized in that, The solid / liquid raw material storage device of the wet vertical stirring and grinding unit (200) includes a mixture bin (201), a steel fiber bin (203), a cement bin (205), a fly ash bin (207), a silica fume bin (209), an admixture tank (211) and a water tank (213) which are arranged in parallel and connected to the output end of the bucket elevator (110).

6. The production system of ultra-high performance concrete according to claim 5, characterized in that, The output ends of the mixture bin (201), the steel fiber bin (203), the cement bin (205), the fly ash bin (207), the silica fume bin (209), the admixture tank (211) and the water tank (213) are respectively connected to the feeding port (215) of a vertical stirring mill (216) through corresponding mixture belt scales (202), steel fiber belt scales (204), cement powder pumps (206), fly ash powder pumps (208), silica fume powder pumps (210), admixture pumps (212) and water pumps (214).

7. The production system of ultra-high performance concrete according to claim 6, characterized in that, A stirring shaft (217) with steel bars (218) is arranged in the vertical stirring mill (216). The output end of the vertical stirring mill (216) is connected to the input end of a vacuum high-pressure forming unit (300) through a stop valve A (219) and a concrete pump (220).

8. The production system of ultra-high performance concrete according to claim 5, characterized in that, The wastewater tank (502) is connected to a wastewater pump A (309) and a wastewater pump B (410) through a wastewater inlet (501). The outlet end of the wastewater tank (502) is connected to the water tank (213) of the wet vertical stirring and grinding unit (200) through a wastewater reflux pump (504).

9. The production system of ultra-high performance concrete according to claim 2, characterized in that, The vacuum high-pressure forming unit (300) includes a distributor (301) connected to the concrete pump (220). The distributor (301) is connected to an enclosed vacuum high-pressure forming machine (305). The enclosed vacuum high-pressure forming machine (305) is provided with a hydraulic shaft (302), a pressure head plate (303) connected to the hydraulic shaft (302), and a pressure-bearing bottom plate (304).

10. The production system of ultra-high performance concrete according to claim 2, characterized in that, One end of the autoclave (403) is connected with a steam pipeline (404) and a pressure relief valve (405). An air pressure gauge (406) and a thermometer (407) are also provided on the autoclave (403).

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