A waste incineration tailings coarse aggregate reinforcing device

Abstract

The application belongs to the technical field of tailings treatment, and particularly relates to a waste incineration tailings coarse aggregate reinforcing device, which comprises a tailings conveying unit, a cement spraying unit and a drying system. The tailings conveying unit comprises a conveying belt and a vibrator. The conveying belt is used for conveying tailings aggregate, and the vibrator is used for providing vibration for the conveying belt to realize tumbling of the tailings aggregate. The cement spraying unit comprises a slurry preparation assembly, a delivery pump and a spraying assembly. The slurry preparation assembly is used for preparing cement slurry, the delivery pump is used for connecting the slurry preparation assembly and the spraying assembly, and the spraying assembly is used for continuously spraying the cement slurry on the tailings aggregate. The drying system comprises a hot air blowing assembly and a drying box. The conveying belt passes through the drying box, and the hot air blowing assembly is used for providing circulating hot air in the drying box to realize rapid drying of the cement slurry on the surface of the tailings aggregate and in the tailings aggregate. The device can effectively improve the structural strength of the tailings aggregate, has better crushing resistance, and expands the application range.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tailings treatment, and particularly relates to a waste incineration tailings coarse aggregate strengthening device. BACKGROUND

[0002] With the acceleration of urbanization, the amount of household waste is rising sharply, bringing a serious environmental challenge. Household waste incineration power generation technology has become one of the mainstream methods to solve this problem due to its advantages of reduction and resource utilization. However, a large amount of solid waste, i.e. household waste incineration tailings, is inevitably produced in the incineration process. The traditional treatment method is to directly bury the tailings. The tailings contain a considerable proportion of siliceous, calcareous and other mineral components, which have the potential to be used as building materials. Direct landfill leads to a large amount of valuable aggregate resources being wasted. At the same time, the tailings may contain harmful substances such as heavy metals and soluble salts. Long-term direct landfill poses a potential risk of leaching and polluting soil and groundwater, which does not conform to the concept of green and sustainable development.

[0003] To alleviate the landfill pressure and improve resource utilization, a technology for preparing concrete by using tailings to replace natural aggregate has emerged. This technology greatly improves the utilization rate of incineration tailings and has the advantages of low cost, environmental protection and resource saving. However, the aggregate in the traditional household waste incineration tailings concrete is generally not strengthened and is used directly. Due to the existence of a large number of pores and micro-cracks inside the tailings particles, the concrete structure is relatively weak, the bearing capacity is small, and the service life is difficult to maintain for a long time, so the application range is limited. In order to improve the mechanical properties of the tailings prepared concrete, it is usually necessary to rely on a strengthening device to substantially improve the pores and surface of the coarse aggregate tailings to enhance the strength of the tailings itself.

[0004] However, the existing devices for strengthening the tailings are difficult to significantly improve the compression resistance of the aggregate body, the strengthening effect is unstable, and the application range is limited. For example, a traditional tailings strengthening device improves the performance of concrete by tailings screening classification and gradation optimization. This device mainly focuses on the particle size screening and combination distribution of the aggregate. Different particle size tailings are screened out for combination to enhance the mechanical properties of the concrete. However, this device does not substantially improve the strength, porosity and surface characteristics of the tailings aggregate particles, and the improvement effect on the mechanical properties of the concrete is limited. For another example, a common strengthening device uses chemical solution immersion. This device usually uses stirring or vibration to cooperate with the immersion container to uniformly immerse the tailings in the chemical solvent. This device mainly focuses on the surface of the aggregate, and is difficult to repair the pores and micro-cracks inside the tailings. Therefore, the improvement effect on the compression resistance of the aggregate body is very small, and it is difficult to adapt to the preparation of higher strength concrete, so the application range is limited. SUMMARY

[0005] In order to solve the problems existing in the prior art, the purpose of the present application is to provide a waste incineration tailing coarse aggregate reinforcing device, which can effectively improve the structural strength of the tailing aggregate, has better anti-breaking capacity, realizes that the tailing aggregate can be applied in higher standard concrete, and expands the application range.

[0006] The technical scheme of the present application is:

[0007] A waste incineration tailing coarse aggregate reinforcing device, comprising a storage tank, further comprising:

[0008] A tailing conveying unit, comprising a conveying belt and a vibrator, the conveying belt is used for conveying the tailing aggregate, the conveying end of the conveying belt is lapped on the inlet of the storage tank, and the vibrator is connected with the rack of the conveying belt and used for providing vibration for the conveying belt to realize tumbling of the tailing aggregate;

[0009] A cement spraying unit, which is arranged on the side of the conveying belt away from the storage tank, comprises a slurry preparation assembly, a delivery pump and a spraying assembly, the slurry preparation assembly is used for preparing cement slurry with uniform mixing, the delivery pump is connected between the slurry preparation assembly and the spraying assembly, and the spraying assembly is arranged above the conveying belt and used for spraying the tailing aggregate with cement slurry;

[0010] A drying system, which is arranged at the back side of the cement spraying unit and used for drying the cement slurry on the surface of the tailing aggregate and entering the tailing aggregate.

[0011] Preferably, the spraying assembly comprises:

[0012] A distribution pipe, which is fixed above the conveying belt through a rack, one end of the distribution pipe is communicated with the discharge port of the delivery pump;

[0013] A plurality of nozzles, which are uniformly distributed on the distribution pipe, the nozzles are arranged towards the conveying belt, and the spray angles of adjacent nozzles are different.

[0014] Preferably, a plurality of overflow holes are arranged on the belt surface of the conveying belt, which are used for discharging the excess cement slurry accumulated at the bottom of the tailing aggregate, and a collection tank is arranged at the bottom of the conveying belt, which is used for collecting the excess cement slurry discharged from the overflow holes, and the collection tank is communicated with the stirring barrel or the distribution pipe through a pump body.

[0015] Preferably, the drying system comprises a hot air blowing assembly and a drying box, the opposite two side walls of the drying box are respectively provided with an inlet and an outlet, the conveying belt passes through the drying box through the inlet and the outlet, the output end of the hot air blowing assembly is communicated with the drying box, and the drying box is provided with circulating hot air.

[0016] Preferably, the distribution pipes are provided in multiple groups, the drying boxes are provided in multiple numbers, the multiple groups of distribution pipes and the multiple drying boxes are sequentially and spacedly arranged along the conveying direction of the conveying belt, and each group of distribution pipes is provided with multiple distribution pipes.

[0017] Preferably, the slurry preparation assembly comprises:

[0018] The stirring barrel is provided with a water inlet and a cement inlet on the top cover thereof;

[0019] The rotating pipe is made of rigid material and is vertically inserted into the stirring barrel, with the lower end rotatably connected to the bottom wall of the stirring barrel and the upper end penetrating through the top cover of the stirring barrel; a plurality of material suction holes are formed in the side wall of the rotating pipe in the stirring barrel, and a plurality of stirring blades are uniformly distributed on the side wall of the rotating pipe;

[0020] The driver is connected to the rotating pipe at the output end and is used to drive the rotating pipe to rotate so as to drive the stirring blades to stir the water and cement in the stirring barrel;

[0021] The material conveying pipe is in communication with the upper end of the rotating pipe at one end and is rotatably connected to the upper end of the rotating pipe, and is in communication with the material inlet of the conveying pump at the other end.

[0022] Preferably, the hot air blowing assembly comprises:

[0023] The air blower;

[0024] The heating channel comprises a metal heat insulation shell and an electric heating wire, one end of the shell is in communication with the air outlet of the air blower, the other end is in communication with the cavity of the drying box through a plurality of air blowing pipes penetrating through the plurality of side walls of the drying box, and the electric heating wire is installed in the shell.

[0025] Preferably, the conveying belt is provided with a material pushing assembly for providing tumbling driving of tailing aggregate in the area where the spray head is located.

[0026] Preferably, the device further comprises a controller and a plurality of temperature sensors, the controller is electrically connected to the temperature sensors and the electric heating wire, the temperature sensors are used to monitor the internal temperature of the drying box in real time, and the controller is used to regulate the heating temperature of the electric heating wire according to the real-time temperature inside the drying box.

[0027] Preferably, the air outlet of the air blower is in communication with the distribution pipe through a blowing pipe, the blowing pipe is provided with a valve, the valve is used for interval opening and closing control between the conveying pump to realize internal cleaning of the spray head.

[0028] Compared with the prior art, the garbage incineration tailing coarse aggregate strengthening device has the following beneficial effects:

[0029] The device realizes double reinforcement of the aggregate body and interface through three-order synergistic mechanism of vibration tumbling, cement penetration and gradient curing, the vibrator is used to force the aggregate to tumble in three dimensions on the conveying belt, so that the internal pores and micro cracks of the slag aggregate are fully exposed; the cement slurry is sprayed into the inside and surface of the aggregate by the spraying assembly under the action of the feeding pump from the slurry preparation assembly, so as to form a core reinforcement structure of "micro crack filling + pore plugging"; then, when the aggregate enters the drying system under the movement of the conveying belt, the "suction" effect is generated due to the rapid evaporation of the surface moisture, which is similar to capillary action, so as to promote the liquid water and un-solidified cement slurry in the deeper part of the aggregate to migrate from the inside to the outside and from the low temperature zone to the high temperature evaporation zone, thereby realizing gradient drying and promoting the directional crystallization of the cement slurry from the outside to the inside, and finally forming a composite reinforcement body of surface dense layer-transition buffer layer-core repair layer. In order to effectively improve the structural strength of the slag aggregate, the better compression resistance and crushing resistance are generated, and the slag aggregate can be applied in high-strength concrete with higher standards, so that the application range is expanded. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the overall structure top view in the embodiment of the application;

[0031] Figure 2 It is the overall structure side view in the embodiment of the application;

[0032] Figure 3 It is the structure schematic view of the slurry preparation assembly in the embodiment of the application;

[0033] Figure 4 It is the structure schematic view of the heating channel in the embodiment of the application;

[0034] Figure 5 It is the internal structure schematic view of the drying box in the embodiment of the application;

[0035] Figure 6 It is the structure schematic view of the conveying belt in the embodiment of the application;

[0036] Figure 7 It is the structure schematic view of the material pushing assembly in the embodiment of the application

[0037] Figure 8 It is the work flow chart of the slag concrete intelligent equipment in the embodiment of the application, wherein A is the garbage incineration slag coarse aggregate reinforcement device.

[0038] BRIEF DESCRIPTION OF DRAWINGS

[0039] 1, storage tank; 2, conveyor belt; 3, vibrator; 4, slurry preparation assembly; 41, stirring barrel; 42, rotating tube; 43, suction hole; 44, stirring blade; 45, driver; 46, conveying pipe; 5, conveying pump; 6, spraying assembly; 61, distribution pipe; 62, spray head; 7, hot air blowing assembly; 71, air blower; 72, heating channel; 721, shell; 722, electric heating wire; 73, blowing pipe; 8, drying box; 9, stirring assembly; 91, driving motor one; 92, control rod one; 93, driving motor two; 94, control rod two; 95, connecting piece; 96, stirring rod; 10, temperature sensor; 11, blowing pipe; 12, valve; 13, overflow hole; 14, collection pool; 15, pump body. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0041] Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0043] Reference Figures 1 to 7As shown, in order to effectively improve the structural strength of the tailings aggregate, produce better compression resistance and crushing resistance, and realize the application of the tailings aggregate in higher standard high-strength concrete, and expand the application range. The embodiment provides a waste incineration tailings coarse aggregate strengthening device, which comprises a storage tank 1, a tailings conveying unit, a cement spraying unit and a drying system. The tailings conveying unit comprises a conveying belt 2 and a vibrator 3. The conveying belt 2 is used for conveying the tailings aggregate, and the conveying end thereof is lapped on the inlet of the storage tank 1. The vibrator 3 is connected with the conveying belt 2 through a rack, and is used for providing vibration for the conveying belt 2 to realize the tumbling of the tailings aggregate. The cement spraying unit comprises a slurry preparation assembly 4, a delivery pump 5 and a spraying assembly 6. The slurry preparation assembly 4 is used for preparing cement slurry with uniform mixture. The delivery pump 5 is connected between the slurry preparation assembly 4 and the spraying assembly. The spraying assembly 6 is arranged above the conveying belt 2, and is used for continuously spraying the cement slurry during the conveying of the tailings aggregate. The drying system comprises a hot air blowing assembly 7 and a drying box 8. The opposite two side walls of the drying box 8 are respectively provided with an inlet and an outlet. The drying box 8 is made of heat insulation material to reduce temperature loss. Further, the conveying belt 2 passes through the drying box 8 through the inlet and the outlet. The output end of the hot air blowing assembly 7 is communicated with the drying box 8, and is used for providing circulating hot air in the drying box 8 to realize the rapid drying of the cement slurry on the surface of the tailings aggregate and into the tailings aggregate.

[0044] Specifically, in the process of tailings aggregate strengthening treatment, the tailings conveying unit, the cement spraying unit and the drying system are cooperated, that is, the three-stage cooperative mechanism of vibration tumbling, cement penetration and gradient curing is used to realize the double strengthening of the aggregate body and the interface. Specifically, the vibrator 3 is used to force the aggregate to tumble three-dimensionally on the conveying belt 2, and the internal pores and micro-cracks of the tailings aggregate are fully exposed. The cement slurry is sprayed into the inside and surface of the aggregate through the spraying assembly 6 from the slurry preparation assembly 4 under the action of the delivery pump, and a core reinforcement structure of "micro-crack filling + pore plugging" is formed. Further, the aggregate enters the drying system under the movement of the conveying belt 2, and the hot air blowing assembly 7 and the drying box 8 are cooperated. With the increase of the contact time of the aggregate and the drying system, the rapid evaporation of the surface moisture will produce a "suction" effect, which is similar to capillary action, and promotes the liquid water and un-solidified cement slurry in the deeper part of the aggregate to migrate from the inside to the outside and from the low temperature zone to the high temperature evaporation zone along the pores and micro-cracks, and realizes the hot air gradient drying. That is, the temperature difference effect of the hot air from the surface layer to the core of the aggregate is used to promote the directional crystallization of the cement slurry from the outside to the inside, and finally a composite reinforcement body of the surface dense layer-transition buffer layer-core repair layer is formed. In order to effectively improve the structural strength of the tailings aggregate, produce better compression resistance and crushing resistance, and realize the application of the tailings aggregate in higher standard high-strength concrete, and expand the application range.

[0045] Referring toFigure 3 As shown, further, in order to ensure that the cement slurry can fully and efficiently enter the pores and micro-cracks of the tailings aggregate. The slurry preparation assembly 4 comprises: a stirring barrel 41, a rotating pipe 42, a driver 45 and a feeding pipe 46. The top cover of the stirring barrel 41 is provided with a water inlet and a cement inlet; the rotating pipe 42 is of rigid material, vertically inserted into the stirring barrel 41, and the lower end is rotatably connected with the bottom wall of the stirring barrel 41, and the upper end penetrates through the top cover of the stirring barrel 41, a plurality of suction holes 43 are formed in the side wall of the rotating pipe 42 located in the stirring barrel 41, and a plurality of stirring blades 44 are uniformly distributed on the side wall of the rotating pipe 42; the output end of the driver 45 is connected with the rotating pipe 42, which is used to drive the rotating pipe to rotate, so as to drive the stirring blades 44 to stir the water and cement in the stirring barrel 41. Then, one end of the feeding pipe 46 is in communication with the upper end of the rotating pipe and they are rotatably connected, and the other end is in communication with the inlet of the conveying pump 5. In order to adapt to the installation mode of the rotating pipe 42 and facilitate the rotation of the rotating pipe 42, the driver can be composed of a motor, a driving gear and a driven gear. During installation, the motor is fixed with the stirring barrel 41 through a fixed frame, the axis of the motor output shaft is parallel to the axis of the rotating pipe 42, then the driving gear is sleeved and fixed on the output shaft of the motor, the driven gear is sleeved and fixed on the rotating pipe 42, and the driving gear and the driven gear are kept in meshing state. Thus, during use, the driver 45 provides power output for the rotating pipe 42, so that the rotating pipe 42 can drive the stirring blades 44 to rotate continuously at a certain speed. On the one hand, the cement and water can be forcibly mixed by the stirring blades 44 to obtain more uniform cement slurry, which can avoid slurry settlement or caking, so that the cement slurry can fully enter the aggregate pores when sprayed on the tailings aggregate, and the caking can also avoid the blockage of the spray head 62, so that the cement slurry can effectively realize uniform coating and filling of the aggregate. In addition, by designing the structure of the suction hole 43 on the rotating pipe 42, the cement slurry transported to the spray head 62 can be ensured to have a fine degree from the source, which can better strengthen the aggregate, and the design of the suction hole 43 of the rotating pipe 42 also avoids the additional installation of a suction pipe and a feeding pump, reduces the interference with the stirring blades 44, and saves the cost.

[0046] Referring to Figure 1 and Figure 2As shown, further, in order to ensure that the cement slurry can fully and efficiently enter the pores and micro-cracks of the slag aggregate, and improve the strengthening effect of the slag aggregate. The spraying assembly 6 includes a distribution pipe 61 and a plurality of spray heads 62 arranged on the distribution pipe 61. Specifically, the distribution pipe 61 is fixed above the conveying belt 2 by a rack, one end of the distribution pipe 61 is in communication with the discharge port of the conveying pump 5, and the other end is generally closed or provided with a valve 12 to prevent the cement slurry from being sprayed out of the other end. A plurality of spray heads 62 are uniformly distributed on the distribution pipe 61, the spray heads 62 have nozzles facing the conveying belt 2, and the adjacent spray heads 62 have different spray angles. Preferably, the angle of the spray head 62 is generally set to be between 0° and 60° with the vertical direction. Thus, through multi-angle jetting, a dynamic interlaced covering is formed when the aggregate is tumbling, so that different particle size aggregates can obtain uniform slurry film, the difference in slurry adhesion amount per unit aggregate surface area is greatly reduced, and local non-strengthening areas that occur in traditional single-angle spraying are avoided.

[0047] Referring to Figure 1 As shown, further, in order to enhance the coating and void filling effect of the cement slurry on the slag aggregate. In fact, the distribution pipe 61 is preferably provided with multiple groups, and the drying box 8 is preferably provided with multiple groups, so that on the conveying belt 2, multiple groups of distribution pipes 61 and multiple drying boxes 8 are sequentially and spaced apart along the conveying direction of the conveying belt 2, and each group of distribution pipes 61 is provided with multiple distribution pipes 61, forming an alternating spraying and drying state. Thus, using staged spraying to achieve "bottom layer penetration + surface layer thickening" double strengthening; multi-stage drying avoids premature hardening of the surface to hinder the escape of internal moisture, so that the compressive strength gradient of the aggregate strengthening layer rises, avoids stress concentration generated by single strengthening, and reduces the risk of cracking.

[0048] Referring to Figures 1 to 3As shown, further, in order to enhance the strengthening effect of the tailings aggregate, the hot air blowing assembly 7 comprises a blower 71 and a heating channel 72. Specifically, the heating channel 72 is composed of a metal heat insulation shell 721 and an electric heating wire 722, one end of the shell 721 is in communication with the air outlet of the blower 71, and the other end is in communication with the cavity of the drying box 8 through a plurality of air supply pipes 73 penetrating the multiple side walls of the drying box 8, and the electric heating wire 722 is installed in the shell 721. In addition, in order to realize intelligent control of the temperature, the device further comprises a controller and a plurality of temperature sensors 10, the controller is electrically connected with the temperature sensors 10 and the electric heating wire 722, the temperature sensors 10 are used for real-time monitoring of the internal temperature of the drying box 8, and the controller is used for heating temperature regulation of the electric heating wire 722 according to the real-time temperature inside the drying box 8. First, the electric heating wire 722 is used to heat the air flow blown by the blower 71, which is convenient for the temperature rise in the drying box 8, and then the plurality of air supply pipes 73 provide hot air for the drying box 8 in multiple directions, the multi-directional hot air accelerates the internal moisture migration of the aggregate, and promotes the deep curing of the slurry; the metal shell 721 reduces heat loss and reduces energy consumption. Then, the plurality of temperature sensors 10 are used to monitor the three-dimensional temperature field of the drying box 8 in real time, and the controller adopts a PID controller to dynamically adjust the power of the electric heating wire 722. When the temperature difference of the monitoring points is greater than the preset temperature, the low-temperature area air volume is automatically compensated to maintain the stability of the temperature in the box. This design greatly reduces the performance fluctuation of the aggregate strengthening layer, ensuring the consistency of mass production.

[0049] Referring to Figure 1 and Figure 2As shown, further, in order to ensure that the cement slurry can fully and efficiently enter the pores and micro-cracks of the slag aggregate, and improve the strengthening effect of the slag aggregate, the conveying belt 2 is provided with a stirring assembly 9 for providing stirring drive for the slag aggregate in the area where the spray head 62 is located. The stirring assembly 9 comprises two parallel guide rails, a stirring rod 96 and a driving part. The stirring rod 96 is uniformly provided with a plurality of stirring teeth. The two guide rails are respectively fixed on the two sides of the conveying belt 2. The two ends of the stirring rod 96 slide in the two guide rails through sliding blocks. The sliding blocks are sleeved on the stirring rod 96 and are rotationally connected with the stirring rod 96. The two ends of the stirring rod 96 are respectively provided with a gear through the corresponding sliding block sleeve. The gear is meshingly provided with a rack. The driving part comprises an electric telescopic rod. The electric telescopic rod is installed on one side of the guide rail. The telescopic end is fixed with the sliding block. Thus, through the telescopic movement of the electric telescopic rod, the stirring rod 96 is indirectly reciprocated on the conveying belt 2 through the sliding block. Through the cooperation of the gear and the rack, the stirring rod 96 is rotated during the reciprocating movement, so as to stir the aggregate on the conveying belt 2. The stirring assembly 9 can also be designed as a car wiper mechanism to realize the reciprocating movement of the stirring rod like a wiper to stir and tumble the aggregate. Thus, the aggregate is thrown and tumbled by mechanical auxiliary stirring, and the aggregate is forced to tumble three-dimensionally. In this way, the aggregate tumbling strength can be effectively strengthened, the slurry penetration depth can be improved, and the spraying blind area caused by the aggregate stacking can be avoided. Figure 7 As shown, specifically, the wiper mechanism comprises a driving motor one 91, a driving motor two 93, a control rod one 92 and a control rod two 94. The driving motor one 91 is a linear motor. The output shaft thereof is connected with the control rod one 92 for driving the control rod one 92 to move up and down and adjust the position. The driving motor two 93 is installed at one end of the control rod one 92 away from the driving motor one 91. The driving motor two is a servo motor. The output shaft thereof is connected with the control rod two 94 for driving the control rod two 94 to swing left and right. The stirring rod 96 is connected with the control rod two 94 through a connecting piece 95. The stirring rod 96 and the control rod two 94 are kept horizontal. Thus, through the cooperation of the driving motor one 91, the driving motor two 93, the control rod one 92 and the control rod two 94, the stirring rod 96 swings left and right on the conveying belt 2 to stir the aggregate.

[0050] Referring to Figure 1 and Figure 2As shown, further, in order to ensure that the cement slurry can fully and efficiently enter the pores and micro-cracks of the slag aggregate, and improve the strengthening effect of the slag aggregate. The air outlet of the air blower 71 is communicated with the distribution pipe 61 through the blowing pipe 11, and the blowing pipe 11 is provided with a valve 12. The valve 12 is used for interval opening and closing control between the air blower 71 and the conveying pump 5, so as to realize the internal cleaning of the spray head 62. In use, the air blower 71 is connected with the distribution pipe 61 through the blowing pipe 11, and the valve 12 is opened during the intermittent spraying period. The high-pressure airflow flushes the inner wall of the spray head 62, which can effectively prevent the cement slurry from depositing and hardening in the spray head 62, ensure the continuity of spraying, avoid the occurrence of spraying blind area of the aggregate, and ensure the consistency of the aggregate spraying on the conveying belt 2.

[0051] Referring to Figure 6 As shown, further, a plurality of overflow holes 13 are formed in the belt surface of the conveying belt 2, which are used for discharging the excess cement slurry accumulated at the bottom of the slag aggregate. The bottom of the conveying belt 2 is provided with a collection tank 14 for collecting the excess cement slurry flowing out of the overflow holes 13. The collection tank 14 is communicated with the stirring barrel 41 or the distribution pipe 61 through a pump body 15. Through the design of the overflow holes 13 on the conveying belt 2, the excess cement slurry can be recycled to the collection tank 14, avoiding the adhesion of the aggregate caused by the accumulation of the slurry, and ensuring the dispersibility of the aggregate. Further, under the cooperation of the pump body 15, the slurry is returned to the stirring barrel 41 or the distribution pipe 61 to realize the recycling of the slurry, thereby effectively reducing the raw material cost.

[0052] Specifically, the slag concrete intelligent device includes the device, and the slag concrete intelligent device processes the household garbage incineration slag as follows:

[0053] First, the preliminary manual sorting is performed. Workers are asked to pick up large stones, large broken tiles, long strip-shaped objects, etc. The sieve used for the initial screening is a square hole sieve, and the sieve size is 200mm*200mm. Then, a dry magnetic separation device with a magnetic field strength of not less than 10000GS is used for screening. The main purpose is to remove large-volume slag that is not burnt or not combustible. Then, four-layer vibrating screens are used for screening. The sieve is a 9.5mm, 4.75mm, 0.15mm, and non-hole smooth metal plate. This step can screen out large-volume slag larger than 9.5mm, coarse aggregate of 4.75mm-9.5mm, fine aggregate of 0.15mm-4.75mm, and micro-ash smaller than 0.15mm. These materials are processed respectively, as shown in Figure 8

[0054] 1. The slag larger than 9.5mm is conveyed to a jaw crusher for crushing. Then, the crushed slag is returned to the four-layer vibrating screen for further screening. Finally, the large-volume slag is completely crushed into coarse aggregate, fine aggregate, and micro-powder.

[0055] ​2. Coarse aggregate with a particle size of 4.5mm-9.5mm is fed into the tailings coarse aggregate strengthening device provided by this invention, such as... Figure 8 As shown at point A, aggregate strengthening is achieved by spraying cement onto the aggregate. The spraying process involves setting the spraying speed of nozzle 62 to 4 ml / s, with each spray cycle lasting 8-12 seconds. The cement slurry has a water-cement ratio of 1.0. Vibration is maintained throughout the process on conveyor belt 2. Finally, the treated and dried coarse aggregate is conveyed via conveyor belt 2 into storage tank 1, thereby enhancing the performance of the coarse aggregate.

[0056] 3. Fine aggregates with a particle size of 0.15mm-4.75mm are fed into vibrating screen No. 1. Vibrating screen No. 1 has a 2.36mm mesh and a smooth, inclined metal plate below. The aggregate on the screen is conveyed to a storage tank. The aggregate below is conveyed to vibrating screen No. 2, which has a 1.18mm mesh. Subsequent steps are the same as for vibrating screen No. 1. The aggregate that passes through the screen is conveyed to vibrating screen No. 3, which has a 0.6mm mesh. The first two steps are repeated. The aggregate then enters vibrating screen No. 4, which has a 0.3mm mesh. The material on the screen is fed into a storage tank, while the aggregate that passes through enters another storage tank. This process yields five different particle sizes of fine aggregate, which are stored in different storage tanks. When using, fine aggregates can be prepared according to the required particle size distribution. This device can also be used for spraying cement slurry to enhance the performance of the fine aggregates.

[0057] 4. Micro powder with a particle size of less than 0.15 mm is conveyed into a calcining furnace for calcination. It needs to be calcined at 750℃-850℃ for 1 hour, then held at that temperature for 1 hour. After calcination, it is conveyed into a grinding mill and ground at 1400 r / min for 35-45 minutes to enhance the performance of the micro powder. After grinding, it is conveyed into a storage tank.

[0058] 5. All aggregate storage tanks are intelligent storage tanks. The amount of aggregate to be taken out is adjusted by computer. When concrete needs to be made, the program calculates the required amount of each aggregate and prepares the gradation of fine aggregate. The required aggregates are transported to the combined mixing plant by conveyor belt. Here, a certain amount of ordinary concrete and admixtures can be poured in and mixed.

[0059] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A waste incineration tailings coarse aggregate reinforcement device comprising a storage tank (1), characterized in that, Also include: Tailings conveying unit, including conveying belt (2) and vibrator (3), the conveying belt (2) is used to transport tailings aggregate, its delivery end is lapped on the inlet of the storage tank (1), the vibrator (3) is connected with the rack of the conveying belt (2), for providing vibration for the conveying belt (2);Utilize vibrator (3) to force aggregate to three-dimensional tumbling on conveying belt (2), fully expose the internal pore and microcrack of tailings aggregate;The conveying belt (2) is provided with a raking assembly (9) for providing tumbling drive for tailings aggregate in the area where the spray head (62) is located; Cement spraying unit, which is arranged on the side of the conveying belt (2) away from the storage tank (1), comprises a slurry preparation assembly (4), a delivery pump (5) and a spraying assembly (6), the slurry preparation assembly (4) is used to prepare uniformly mixed cement slurry, the delivery pump (5) is connected between the slurry preparation assembly (4) and the spraying assembly (6), and the spraying assembly (6) is arranged above the conveying belt (2) and used to spray the tailings aggregate with cement slurry; Drying system, which is arranged at the back side of the cement spraying unit, is used to dry the surface of the tailings aggregate and the cement slurry entering the tailings aggregate;The drying system comprises a hot air supply assembly (7) and a drying box (8), opposite two side walls of the drying box (8) are respectively provided with an inlet and an outlet, the conveying belt (2) passes through the drying box (8) through the inlet and the outlet, and the output end of the hot air supply assembly (7) is communicated with the drying box (8) to provide circulating hot air in the drying box (8); The spraying assembly (6) comprises a distribution pipe (61) which is fixed above the conveying belt (2) through a rack, one end of the distribution pipe (61) is communicated with the outlet of the delivery pump (5), a plurality of spray heads (62) are uniformly distributed on the distribution pipe (61), the spray heads (62) are arranged on the distribution pipe (61), the spray heads (62) are arranged on the distribution pipe (61), and the spray heads (62) are arranged on the distribution pipe (61). A plurality of groups of the distribution pipes (61) and a plurality of the drying boxes (8) are sequentially and spacedly arranged along the conveying direction of the conveying belt (2), and each group of the distribution pipes (61) is provided with a plurality of pipe bodies.

2. The device for reinforcing waste incineration tailings coarse aggregate according to claim 1, characterized in that, A plurality of overflow holes (13) are formed in the belt surface of the conveying belt (2) to drain the excess cement slurry accumulated at the bottom of the tailings aggregate, and a collection tank (14) is arranged at the bottom of the conveying belt (2) to collect the excess cement slurry flowing out of the overflow holes (13), and the collection tank (14) is communicated with the distribution pipe (61) through a pump body (15).

3. The device for reinforcing waste incineration tailings coarse aggregate according to claim 1, characterized in that, The slurry preparation assembly (4) comprises: A stirring barrel (41) is provided with a water inlet and a cement inlet on the top cover. A rotating pipe (42) is vertically inserted into the stirring barrel (41), the lower end of which is rotationally connected to the bottom wall of the stirring barrel (41), and the upper end of which penetrates the top cover of the stirring barrel (41), a plurality of material suction holes (43) are formed in the side wall of the rotating pipe (42) in the stirring barrel (41), and a plurality of stirring blades (44) are uniformly distributed on the side wall of the rotating pipe (42); A driver (45) is connected to the rotating pipe (42) and used to drive the rotating pipe (42) to rotate so as to drive the stirring blades (44) to stir the water and cement in the stirring barrel (41); A material conveying pipe (46) is in communication with the upper end of the rotating pipe (42) and rotationally connected to the rotating pipe (42) at one end, and in communication with the material inlet of the conveying pump (5) at the other end.

4. The device for reinforcing waste incineration tailings coarse aggregate according to claim 1, characterized in that, The hot air blowing assembly (7) comprises: A blowing fan (71); A heating channel (72) comprising a metal heat insulation shell (721) and an electric heating wire (722), one end of the shell (721) is in communication with the air outlet of the blowing fan (71), the other end is in communication with the cavity of the drying box (8) through a plurality of blowing pipes (73) penetrating through the plurality of side walls of the drying box (8), and the electric heating wire (722) is installed in the shell (721).

5. The device for reinforcing waste incineration tailings coarse aggregate according to claim 4, characterized in that, The device further comprises a controller and a plurality of temperature sensors (10), the controller is electrically connected with the temperature sensors (10) and the electric heating wire (722), the temperature sensors (10) are installed in the drying box (8) and used to monitor the internal temperature of the drying box (8) in real time, and the controller is used to control the heating temperature of the electric heating wire (722) according to the real-time temperature inside the drying box (8).

6. The device for reinforcing waste incineration tailings coarse aggregate according to claim 4, characterized in that, The air outlet of the blowing fan (71) is in communication with the material distribution pipe (61) through a blowing pipe (11), a valve (12) is arranged on the blowing pipe (11), the valve (12) is used for interval opening and closing control of the conveying pump (5) to realize internal cleaning of the spray head (62).

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