Mortar wastewater recycling device for premixed concrete production field

Abstract

The invention discloses a mortar waste water recycling device in a premixed concrete production field, a primary screening mechanism comprises a mortar discharging groove formed in the top of a sand-stone separator, supporting strip-shaped holes are formed in the two sides of the mortar discharging groove, and first supporting connecting rods are fixedly connected to the inner walls of the two supporting strip-shaped holes; first supporting sliding blocks are slidably connected to the outer walls of the two first supporting connecting rods correspondingly, a first mortar screening plate is fixedly connected between the two first supporting sliding blocks, and reset springs sleeve the bottoms of the outer walls of the two first supporting connecting rods correspondingly. According to the mortar recycling device, mortar can be filtered for the second time on the grid conveying belt, the grid conveying belt can move, in the mortar recycling process, the vast majority of impurities in the mortar can be removed by filtering large gravel and small gravel, and the working efficiency in the mortar recycling process is improved.

Description

Technical Field

[0001] This invention belongs to the field of mortar wastewater recycling technology, and specifically relates to a mortar wastewater recycling device for premixed concrete production sites. Background Technology

[0002] With the rapid development of my country's construction and ready-mixed concrete industries, concrete mixing plants generate a large amount of mixed waste liquid containing mortar, sand, and wastewater during production. Direct discharge of this waste not only results in a serious waste of aggregates and water resources but also pollutes the surrounding soil and water bodies, failing to meet the industry's requirements for green production and energy conservation. Therefore, the recycling and reuse of mortar wastewater and aggregates has become a key technological link in achieving clean production, cost reduction, and efficiency improvement at ready-mixed concrete production sites. Currently, the industry typically uses sand and gravel separators to treat mortar wastewater, separating the sand and gravel from the slurry. The separated sand and gravel can be reused as concrete raw materials, and the wastewater, after sedimentation treatment, can be recycled for batching. However, existing conventional sand and gravel separation equipment generally suffers from problems such as simple structural design and incomplete functionality. Most equipment only has a simple primary or secondary screening structure and lacks multi-stage gradient screening mechanisms, making it difficult to efficiently classify and separate sand, gravel, slurry, and fine powder of different particle sizes. This easily leads to incomplete separation, fine material entrainment, and high solids content in the slurry.

[0003] In the large-scale production and on-site construction of ready-mixed concrete, the efficient recovery and recycling of mortar wastewater is a key link in achieving green production, conserving water and aggregate resources, reducing production costs, and minimizing environmental emissions. Currently, the industry commonly uses sand and gravel separators as the core equipment for mortar wastewater treatment. These separators separate sand and gravel aggregates from the slurry in the wastewater, achieving material recovery and wastewater reuse. However, existing conventional sand and gravel separators have significant structural design flaws. They generally lack multi-stage screening structures and automatic unclogging mechanisms, making it difficult to meet the demands of long-term, high-load continuous operation. In actual production, mortar wastewater has a complex composition with high mud and fine aggregate content. A single screening structure easily leads to incomplete material screening, limiting processing accuracy and efficiency. Furthermore, due to the lack of targeted unclogging design, the screen plates are easily clogged by fine sand, mud, and debris during long-term continuous screening operations, resulting in decreased screen permeability, reduced material throughput, and consequently, reduced separation efficiency, decreased processing capacity, and excessive solids content in the recovered slurry. Clogged screens not only significantly reduce the overall operating efficiency of mortar wastewater recycling systems, but also require frequent shutdowns for manual cleaning, increasing equipment maintenance workload and labor costs. This affects the continuous and stable operation of concrete production lines and makes it difficult to meet the requirements of high efficiency, automation, and green development in modern ready-mixed concrete production. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a mortar wastewater recycling device for ready-mixed concrete production sites, thereby resolving the issues raised in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mortar wastewater recycling device for a ready-mixed concrete production site, comprising a sand and gravel separator, wherein the sand and gravel separator is provided with a primary screening mechanism inside and a secondary screening mechanism is provided on one side of the sand and gravel separator; The primary screening mechanism includes a mortar discharge trough located at the top of the sand and gravel separator. Support strip holes are provided on both sides of the mortar discharge trough. First support connecting rods are fixedly connected to the inner walls of both support strip holes. First support sliders are slidably connected to the outer walls of both first support connecting rods. A first mortar screening plate is fixedly connected between the two first support sliders. Return springs are sleeved on the bottom of the outer walls of both first support connecting rods. A direct-drive shaft is rotatably connected to the bottom of the inner wall of the mortar discharge trough. A mesh conveyor belt is sleeved on the outer walls of the two direct-drive shafts. A mortar mixing roller is rotatably connected to the middle of the inner wall of the sand and gravel separator.

[0006] In one example, one end of one of the direct-drive shafts is fixedly connected to a first output synchronous pulley, one side of the sand and gravel separator is rotatably connected to a first output synchronous pulley, and one end of the first output synchronous pulley is fixedly connected to one end of the mortar mixing roller. The outer walls of both first output synchronous pulleys are fitted with first output synchronous belts.

[0007] In one example, a first drive servo motor is fixedly connected to one side of the mortar unloading trough, and one end of one of the direct-drive shafts is fixedly connected to the output end of the first drive servo motor.

[0008] In one example, two mortar and gravel discharge ports are provided on the back of the mortar unloading trough. One of the mortar and gravel discharge ports has a cleaning scraper fixedly connected to its inner wall, and the cleaning scraper is directly opposite the outer wall of the mesh conveyor belt.

[0009] In one example, the bottom of the sand and gravel separator is fixedly connected to a U-shaped pipe.

[0010] In one example, the secondary screening mechanism includes a material pool located on one side of the sand and gravel separator. Support baffles are fixedly connected to the four corners of the top of the material pool. A drive screw is rotatably connected between two of the support baffles. A second support slider is threadedly connected to the outer wall of the drive screw. A linear support guide rail is fixedly connected between the other two support baffles. A second support slider is slidably connected to the outer wall of the linear support guide rail. A support mounting plate is fixedly connected between two of the second support sliders. Multiple agitator levers are fixedly connected at equal intervals to the bottom of the support mounting plate.

[0011] In one example, a second mortar screening plate is slidably connected to the top of the inner wall of the material pool, and a mortar discharge pipe is fixedly connected to one side of the material pool.

[0012] In one example, a second drive servo motor is fixedly connected to one side of one of the support baffles, and the transmission roller of the drive screw passes through one side of the support baffle and is fixedly connected to the output end of the second drive servo motor.

[0013] In one example, the sand and gravel separator is provided with an intelligent control panel on one side. The surface of the intelligent control panel is provided with a first drive servo motor switch and a second drive servo motor switch. The first drive servo motor is electrically connected to an external power supply through the first drive servo motor switch and the second drive servo motor is electrically connected to an external power supply through the second drive servo motor switch.

[0014] The technical effects and advantages of this invention are as follows: 1. This invention, by setting a mortar discharge trough at the top of the sand and gravel separator, has supporting strip holes on both sides of the mortar discharge trough. A first supporting connecting rod is provided on the inner wall of the supporting strip hole, and a first supporting slider is slidably connected to the outer wall of the first supporting connecting rod. A first mortar screening plate is provided between the two first supporting sliders. A return spring is also provided on the outer wall of the two first supporting connecting rods. Two direct-drive shafts are provided on the inner wall of the mortar discharge trough, and a mesh conveyor belt is sleeved on the outer wall of the two direct-drive shafts. A screening mesh is provided on the outer side of the mesh conveyor belt. The screening mesh mainly performs secondary screening of the mortar. A mortar mixing roller is also provided on the inner wall of the sand and gravel separator, so that during use, the concrete mortar will... First, the mortar enters the mortar unloading trough. Inside the trough, a first mortar screening plate filters out large pieces of sand and gravel. After the first filtration, the mortar passes through a mesh conveyor belt at the bottom of the mortar unloading trough, where it undergoes a second filtration. This mesh conveyor belt is movable, and a scraper on one side of the mortar unloading trough removes any adhering material, ensuring its longevity. Through the filtration of both larger and smaller sand and gravel during mortar recycling, most impurities are removed, improving efficiency.

[0015] 2. In this invention, a first output synchronous pulley is located on one side of one of the direct-drive shafts, and a first output synchronous pulley is also provided on one side of the sand and gravel separator. The two first output synchronous pulleys are connected in series through a first output synchronous belt. One of the first output synchronous pulleys is also connected to one side of the mortar mixing roller. This allows the mortar mixing roller to rotate synchronously through the first output synchronous pulley while the mesh conveyor belt is rotating. This can stir the mortar inside the separator and prevent the mortar from settling inside after a long period of time.

[0016] 3. In this invention, a material pool is located on the other side of the sand and gravel separator. Multiple support baffles are provided at the top of the material pool. A drive screw is located between two support baffles, and a second support slider is threadedly connected to the outer wall of the drive screw. A linear support guide rail is located between two other support baffles, and a second support slider is slidably connected to the outer wall of the linear support guide rail. A support mounting plate is located between two second support sliders, and multiple agitator rods are located at the bottom of the support mounting plate. During operation, the U-shaped tube draws the relatively thick slurry from the bottom of the sand and gravel separator into the material pool under siphon action. During transport, the slurry first passes through the surface of a second slurry screening plate. Simultaneously, the reciprocating motion of the drive screw drives the agitator rods to agitate the surface of the second slurry screening plate, preventing impurities from accumulating on the surface of the second slurry screening plate and preventing blockage at the other end of the U-shaped tube during continuous injection. This second slurry screening plate can further screen the slurry, improving the efficiency of slurry recycling.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the mortar unloading trough of the present invention; Figure 3This is a schematic diagram of the internal structure of the sand and gravel separator of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the sand and gravel separator of the present invention; Figure 5 This is a schematic diagram of the material tank structure of the present invention; Figure 6 This is a schematic diagram of the other side of the sand and gravel separator of the present invention.

[0020] In the diagram: 1. Sand and gravel separator; 2. Primary screening mechanism; 201. Mortar discharge trough; 202. Support strip hole; 203. First support connecting rod; 204. First support slider; 205. First mortar screening plate; 206. Return spring; 207. Direct drive shaft; 208. Mesh conveyor belt; 209. First output synchronous pulley; 210. First output synchronous belt; 211. Mortar mixing roller; 212. U-shaped tube; 213. Mortar and gravel discharge port; 214. Impurity removal scraper; 215. First drive servo motor; 3. Secondary screening mechanism; 301. Material pool; 302. Support baffle; 303. Drive screw; 304. Second support slider; 305. Linear support guide rail; 306. Support mounting plate; 307. Stirring lever; 308. Second mortar screening plate; 309. Second drive servo motor; 310. Mortar discharge pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-6 The present invention provides a technical solution: a mortar wastewater recycling device for a premixed concrete production site, including a sand and gravel separator 1, a primary screening mechanism 2 inside the sand and gravel separator 1, and a secondary screening mechanism 3 on one side of the sand and gravel separator 1. The primary screening mechanism 2 includes a mortar discharge trough 201 located at the top of the sand and gravel separator 1. Support strip holes 202 are provided on both sides of the mortar discharge trough 201. First support connecting rods 203 are fixedly connected to the inner walls of both support strip holes 202. First support sliders 204 are slidably connected to the outer walls of both first support connecting rods 203. A first mortar screening plate 205 is fixedly connected between the two first support sliders 204. Return springs 206 are sleeved on the bottom of the outer walls of both first support connecting rods 203. A direct drive shaft 207 is rotatably connected to the bottom of the inner wall of the mortar discharge trough 201. A mesh conveyor belt 208 is sleeved on the outer walls of the two direct drive shafts 207. A mortar mixing roller 211 is rotatably connected to the middle of the inner wall of the sand and gravel separator 1.

[0023] In use, a mortar discharge trough 201 is installed on the top of the sand and gravel separator 1. Support strip holes 202 are provided on both sides of the mortar discharge trough 201. A first support connecting rod 203 is provided on the inner wall of the support strip hole 202. A first support slider 204 is slidably connected to the outer wall of the first support connecting rod 203. A first mortar screening plate 205 is provided between the two first support sliders 204. A return spring 206 is also provided on the outer wall of the two first support connecting rods 203. Two direct-drive shafts 207 are provided on the inner wall of the mortar discharge trough 201. A mesh conveyor belt 208 is fitted on the outer wall of the two direct-drive shafts 207. A screening mesh is provided on the outer side of the mesh conveyor belt 208. The screening mesh mainly performs secondary screening of the mortar. A mortar mixing roller 211 is also provided on the inner wall of the sand and gravel separator 1, so that during use, the concrete mortar first enters the interior of the mortar discharge trough 201. The first mortar screening plate 205 inside the mortar trough 201 filters out large pieces of sand and gravel. The mortar after the first filtration passes through the mesh conveyor belt 208 located at the bottom of the mortar discharge trough 201. Since there is a mesh on the top of the mesh conveyor belt 208, when the mortar falls to the top of the mesh conveyor belt 208, the mortar will remain on the top of the mesh conveyor belt 208, and then the mortar will undergo a second filtration on the mesh conveyor belt 208. At the same time, the mesh conveyor belt 208 is movable. The impurity removal scraper 214 set on one side of the mortar discharge trough 201 can remove the adhesive substances attached to the mesh conveyor belt 208, which can facilitate the long-term use of the mesh conveyor belt 208. In the process of mortar recycling, by filtering larger and smaller pieces of sand and gravel, most of the impurities inside the mortar can be removed, improving the work efficiency in the mortar recycling process.

[0024] Furthermore, one end of one of the direct drive shafts 207 is fixedly connected to a first output synchronous pulley 209, and one side of the sand and gravel separator 1 is rotatably connected to the first output synchronous pulley 209. One end of the first output synchronous pulley 209 is fixedly connected to one end of the mortar mixing roller 211, and the outer walls of both first output synchronous pulleys 209 are fitted with first output synchronous belts 210. In use, a first output synchronous pulley 209 is located on one side of one of the direct-drive shafts 207, and a first output synchronous pulley 209 is also provided on one side of the sand and gravel separator 1. The two first output synchronous pulleys 209 are connected in series through a first output synchronous belt 210. One of the first output synchronous pulleys 209 is also connected to one side of the mortar mixing roller 211, so that while the mesh conveyor belt 208 is rotating, the mortar mixing roller 211 can be driven to rotate synchronously through the first output synchronous pulley 209, which can stir the mortar inside and prevent the mortar that falls into the sand and gravel separator 1 from settling inside for a long time.

[0025] Furthermore, a first drive servo motor 215 is fixedly connected to one side of the mortar unloading trough 201, and one end of one of the direct-drive shafts 207 is fixedly connected to the output end of the first drive servo motor 215. The first drive servo motor 215 is located on one side of the mortar unloading trough 201. The first drive servo motor 215 mainly drives the direct drive shaft 207 to drive the mesh conveyor belt 208 for transmission, thereby conveying the filtered mortar located at the top of the mesh conveyor belt 208.

[0026] Furthermore, two mortar and gravel discharge ports 213 are provided on the back of the mortar unloading trough 201. One of the mortar and gravel discharge ports 213 has a cleaning scraper 214 fixedly connected to its inner wall, and the cleaning scraper 214 is directly opposite to the outer wall of the mesh conveyor belt 208.

[0027] Two mortar and gravel discharge ports 213 are provided on the back of the mortar unloading trough 201. One of the mortar and gravel discharge ports 213 is mainly used to discharge large pieces of gravel, while the other mortar and gravel discharge port 213 is used to discharge the gravel inside the mortar after it has been filtered on the mesh conveyor belt 208.

[0028] Furthermore, a U-shaped pipe 212 is fixedly connected to the bottom of the sand and gravel separator 1.

[0029] The U-shaped pipe 212, located at the bottom of the sand and gravel separator 1, is positioned between the clear water layer and the sludge layer. Its function is to allow sedimentation to occur when internal mixing stops, causing the bottom sludge to rise and the upper water level to increase. When the water level reaches a set height, a siphon effect is created by the difference in water level between the clear water in the tank and the sludge discharge pipe outlet, automatically pumping the high-concentration sludge from the bottom to the next stage mixing tank for further screening.

[0030] Furthermore, the secondary screening mechanism 3 includes a material pool 301 located on one side of the sand and gravel separator 1. Support baffles 302 are fixedly connected to the four corners of the top of the material pool 301. A drive screw 303 is rotatably connected between two support baffles 302. A second support slider 304 is threadedly connected to the outer wall of the drive screw 303. A linear support guide rail 305 is fixedly connected between the other two support baffles 302. The second support slider 304 is slidably connected to the outer wall of the linear support guide rail 305. A support mounting plate 306 is fixedly connected between the two second support sliders 304. Multiple agitator rods 307 are fixedly connected at equal intervals to the bottom of the support mounting plate 306.

[0031] A second mortar screening plate 308 is slidably connected to the top of the inner wall of the material pool 301, and a mortar discharge pipe 310 is fixedly connected to one side of the material pool 301.

[0032] In use, a material pool 301 is located on the other side of the sand and gravel separator 1. Multiple support baffles 302 are provided on the top of the material pool 301. A drive screw 303 is located between two support baffles 302, and a second support slider 304 is threadedly connected to the outer wall of the drive screw 303. A linear support guide rail 305 is provided between the other two support baffles 302, and a second support slider 304 is slidably connected to the outer wall of the linear support guide rail 305. A support mounting plate 306 is located between two second support sliders 304, and multiple agitator rods 307 are provided at the bottom of the support mounting plate 306. This ensures that during use, the U-shaped tube... 212 will siphon the relatively thick slurry from the bottom of the sand and gravel separator 1 into the material pool 301. During the conveying process, it will first pass through the surface of the second slurry screening plate 308. At the same time, under the reciprocating motion of the drive screw 303, the stirring rod 307 will drive the stirring rod 307 to move on the surface of the second slurry screening plate 308 to prevent impurities inside the slurry from accumulating on the surface of the second slurry screening plate 308 and to prevent blockage of the other end of the U-shaped tube 212 under continuous injection. The second slurry screening plate 308 can further screen the slurry, improving the working efficiency in the slurry recycling process.

[0033] Furthermore, a second drive servo motor 309 is fixedly connected to one side of one of the support baffles 302, and the transmission roller of the drive screw 303 passes through one side of the support baffle 302 and is fixedly connected to the output end of the second drive servo motor 309.

[0034] The second drive servo motor 309, located on one side of the support baffle 302, can drive the drive screw 303 to rotate, which in turn can drive the top stirring lever 307 to move.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mortar wastewater recycling device for a ready-mixed concrete production site, comprising a sand and gravel separator (1), wherein the sand and gravel separator (1) is provided with a primary screening mechanism (2) and a secondary screening mechanism (3) is provided on one side of the sand and gravel separator (1). Its features are: The primary screening mechanism (2) includes a mortar discharge trough (201) located at the top of the sand and gravel separator (1). Both sides of the mortar discharge trough (201) are provided with support strip holes (202). The inner walls of the two support strip holes (202) are fixedly connected with first support connecting rods (203). The outer walls of the two first support connecting rods (203) are slidably connected with first support sliders (204). The two first support sliders (204) are fixedly connected with a first mortar screening plate (205). The bottom of the outer walls of the two first support connecting rods (203) are fitted with reset springs (206). The bottom of the inner wall of the mortar discharge trough (201) is rotatably connected with a direct drive shaft (207). The outer walls of the two direct drive shafts (207) are fitted with a mesh conveyor belt (208). The middle of the inner wall of the sand and gravel separator (1) is rotatably connected with a mortar mixing roller (211).

2. The mortar wastewater recycling device at a ready-mixed concrete production site according to claim 1, characterized in that: One end of one of the direct drive shafts (207) is fixedly connected to a first output synchronous wheel (209), and the first output synchronous wheel (209) is rotatably connected to one side of the sand and gravel separator (1). One end of the first output synchronous wheel (209) is fixedly connected to one end of the mortar mixing roller (211), and the outer walls of both first output synchronous wheels (209) are fitted with first output synchronous belts (210).

3. The mortar wastewater recycling device at a ready-mixed concrete production site according to claim 1, characterized in that: A first drive servo motor (215) is fixedly connected to one side of the mortar unloading trough (201), and one end of one of the direct drive shafts (207) is fixedly connected to the output end of the first drive servo motor (215).

4. The mortar wastewater recycling device at a ready-mixed concrete production site according to claim 1, characterized in that: The back of the mortar unloading trough (201) has two mortar and gravel discharge ports (213). One of the mortar and gravel discharge ports (213) has a cleaning scraper (214) fixedly connected to its inner wall, and the cleaning scraper (214) is directly opposite to the outer wall of the mesh conveyor belt (208).

5. A mortar wastewater recycling device for a ready-mixed concrete production site according to claim 1, characterized in that: The bottom of the sand and gravel separator (1) is fixedly connected to a U-shaped pipe (212).

6. The mortar wastewater recycling device at a ready-mixed concrete production site according to claim 1, characterized in that: The screening mechanism (3) includes a material pool (301) located on one side of the sand and gravel separator (1). Support baffles (302) are fixedly connected to the four corners of the top of the material pool (301). A drive screw (303) is rotatably connected between two of the support baffles (302). A second support slider (304) is threadedly connected to the outer wall of the drive screw (303). A linear support guide rail (305) is fixedly connected between the other two support baffles (302). A second support slider (304) is slidably connected to the outer wall of the linear support guide rail (305). A support mounting plate (306) is fixedly connected between the two second support sliders (304). A plurality of stirring levers (307) are fixedly connected at equal intervals at the bottom of the support mounting plate (306).

7. A mortar wastewater recycling device for a ready-mixed concrete production site according to claim 6, characterized in that: The top of the inner wall of the material pool (301) is slidably connected to a second mortar screening plate (308), and a mortar discharge pipe (310) is fixedly connected to one side of the material pool (301).

8. A mortar wastewater recycling device for a ready-mixed concrete production site according to claim 6, characterized in that: A second drive servo motor (309) is fixedly connected to one side of one of the support baffles (302), and the transmission roller of the drive screw (303) passes through one side of the support baffle (302) and is fixedly connected to the output end of the second drive servo motor (309).

9. A mortar wastewater recycling device for a ready-mixed concrete production site according to claim 3, characterized in that: The sand and gravel separator (1) is provided with an intelligent control panel on one side. The surface of the intelligent control panel is provided with a first drive servo motor switch and a second drive servo motor switch. The first drive servo motor (215) is electrically connected to an external power supply through the first drive servo motor switch and the second drive servo motor (309) is electrically connected to an external power supply through the second drive servo motor switch.

Images