A concrete mixing plant wastewater utilization system

Abstract

The application discloses a concrete mixing plant wastewater utilization system, which comprises a spraying room and a sedimentation tank, a clean floor is arranged in the spraying room, a groove is longitudinally arranged in the middle part of the clean floor, a spraying pipe A is arranged in the groove, and spraying pipes B are arranged on the two side walls of the spraying room; the application also discloses a sedimentation tank for a concrete mixing plant, which comprises a tank body, the tank body is divided into a sand setting unit, an inclined plate sedimentation unit, a straight plate sedimentation unit and a water outlet unit by a partition wall; the sand setting unit comprises a horizontal flow sand setting groove, a water inlet is arranged at the front end of the sand setting groove, a water outlet is arranged at the rear end of the sand setting groove, the water outlet is communicated with the inclined plate sedimentation unit, the inclined plate sedimentation unit and the straight plate sedimentation unit are communicated through a first water passing hole, the straight plate sedimentation unit and the water outlet unit are communicated through a second water passing hole, a water outlet pipe is arranged in the water outlet unit, the water outlet pipe is connected with a water pump, and the water pump is connected with the spraying pipe A and the spraying pipe B through pipelines. The system can realize the recycling of wastewater and reduce the wastewater discharge amount.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete, in particular to a concrete mixing plant wastewater utilization system. BACKGROUND

[0002] For the need of clean production, the transport vehicles of concrete production enterprises need to be cleaned before leaving the factory, and the sand and gravel transport vehicles and concrete pump trucks used by the concrete mixing plant also need to be cleaned frequently. The commonly used cleaning method is to directly spray the vehicle body with a high-pressure water gun connected to a tap water pipe, and the wastewater generated by cleaning is directly discharged into a drainage ditch. This not only causes serious waste of water resources, but also causes the mud contained in the cleaning wastewater to often deposit at the bottom of the drainage ditch, causing poor drainage or blockage. SUMMARY

[0003] To solve the above problems, the present application provides a concrete mixing plant wastewater utilization system.

[0004] The technical scheme adopted by the present application is as follows:

[0005] A concrete mixing plant wastewater utilization system, comprising a spraying room and a sedimentation tank, the sedimentation tank being arranged on one side of the spraying room; a clean floor is arranged in the spraying room, a groove is longitudinally arranged in the middle part of the clean floor, a spraying pipe A is arranged in the groove, and spraying pipes B are arranged on the two side walls of the spraying room;

[0006] The sedimentation tank comprises a tank body, which is divided into a sand settling unit, an inclined plate sedimentation unit, a straight plate sedimentation unit and a water outlet unit by a partition wall; the sand settling unit comprises a horizontal flow sand settling tank, a water inlet is arranged at the front end of the horizontal flow sand settling tank, and a water outlet is arranged at the rear end of the horizontal flow sand settling tank; the water outlet is communicated with the inclined plate sedimentation unit; an inclined plate is arranged in the inclined plate sedimentation unit; the top surface of the inclined plate is connected with the bottom surface of the sand settling tank; the bottom surface of the inclined plate is connected with the bottom surface of the tank body; the inclined plate sedimentation unit and the straight plate sedimentation unit are communicated through a first water passing hole, which is arranged on a first partition wall for separating the inclined plate sedimentation unit and the straight plate sedimentation unit; the straight plate sedimentation unit and the water outlet unit are communicated through a second water passing hole, which is arranged on a second partition wall for separating the straight plate sedimentation unit and the water outlet unit; the bottom surface elevation of the first water passing hole is higher than the bottom surface elevation of the second water passing hole, and the top surface elevation of the first water passing hole is lower than the bottom surface elevation of the water outlet; a water outlet pipe is arranged in the water outlet unit, and the water outlet pipe is connected with a water pump;

[0007] The water pump is connected with a plurality of spraying branch pipes through a spraying main pipe, the spraying branch pipes are respectively connected with the spraying pipe A and the spraying pipe B; and the groove is communicated with the water inlet of the sand settling tank through a drainage channel.

[0008] Further, a plurality of baffles are arranged in the horizontal flow sand settling tank along the water flow direction, the baffles separate the sand settling tank into a plurality of sedimentation units, and the wastewater enters the sedimentation units in sequence through the water inlet and then flows out from the water outlet.

[0009] By adopting the baffle, the sand setting basin is divided into several sedimentation units, the wastewater sedimentation effect is improved, the sand setting tank volume is reduced, and the sand and stone mainly settle in the first two sedimentation units, so that the sand and stone are conveniently cleaned.

[0010] Further, the side wall of the horizontal flow sand setting tank is provided with a slot, and the baffle is inserted into the slot. The baffle is conveniently taken out and the sand and stone are conveniently cleaned.

[0011] Further, the baffle is made of a wooden board, and a hand hole is formed in the upper end of the wooden board. The wooden board is light in weight and is convenient to take out. After the wooden board is soaked in water, the sealing performance of the slot is good, the amount of wastewater directly flowing through the baffle is reduced, and the sedimentation effect is improved.

[0012] Further, in order to improve the sedimentation effect and conveniently collect and recycle the sludge in the inclined plate sedimentation unit, the inclination of the inclined plate in the inclined plate sedimentation unit is preferably 20-35°, and the inclined plate, the first partition wall and the ground of the tank body form a right trapezoidal sedimentation space.

[0013] Further, the bottom of the sedimentation space is provided with a sludge discharge port, the sludge discharge port is connected with a sludge discharge pump, and the sludge discharge pump is connected with the front end of the sand setting tank through a sludge discharge pipe. Small particles and light impurities such as stone powder contained in the wastewater after the sand setting tank are settled in the sedimentation space, and are returned to the front end of the sand setting tank through the sludge discharge pump and the sludge discharge pipe for recycling treatment, so that the utilization rate of sand and stone is improved and the sludge in the inclined plate sedimentation unit is conveniently cleaned.

[0014] Further, the outer side wall of the water outlet unit is provided with a support arm at the upper end, and a water pump is installed on the support arm, and the water inlet of the water pump is connected with the upper end opening of the water outlet pipe. The installation is convenient, and the pipeline connection is less.

[0015] Further, the two sides of the cleaning ground are respectively provided with slopes towards the middle part. The washing wastewater is conveniently collected in the middle part groove and finally discharged into the sedimentation tank through the drainage ditch.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. By setting the sedimentation tank to treat the car washing wastewater, the sand and stone in the car washing wastewater can be separated and reused, and the raw materials are saved. The clean wastewater after sedimentation can be used as a cleaning water source to supply water to the spraying system, so that the wastewater is recycled and the wastewater discharge amount is reduced.

[0018] 2. By setting the horizontal flow sand setting tank at the front end of the sedimentation tank, the washing wastewater first enters the sand setting tank to perform solid-liquid separation through natural sedimentation. The sand and stone particles in the wastewater can be basically all settled in the sand setting tank, and the sand and stone can be conveniently removed by a shovel or the like for secondary use. The wastewater separated from the sand and stone particles enters the inclined plate sedimentation unit and the straight plate sedimentation unit in sequence for the second and third times of sedimentation, and the clean water enters the water outlet unit for temporary storage as a cleaning water source. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Figure 1 is a structural schematic diagram of a concrete mixing plant wastewater utilization system according to the present application.

[0020] Figure 2 Figure 2 is a schematic diagram of the position relationship between the spraying room and the sedimentation tank according to the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in combination with the drawings and a preferred embodiment.

[0022] Referring to Figure 1 and Figure 2 the embodiment provides a concrete mixing plant wastewater utilization system, which comprises a sedimentation tank and a spraying room 40.

[0023] The spraying room 40 is built with color steel plates, and the floor of the spraying room is poured with concrete with a strength grade C30 and an impermeability grade not lower than P6. The floor is sloped from the two sides to the middle part by 2-3°, and two grooves 42 are longitudinally formed in the middle part, two spraying pipes A 43 are respectively arranged in the two grooves 42, and spraying holes are formed in the upper side of the two spraying pipes A 43. Two spraying pipes B 44 are respectively arranged on the two side walls of the spraying room, and spraying holes are formed in the two spraying pipes B 44 towards the middle part. The spraying pipes A 43 can be used for cleaning the ground of the transport vehicle, and the spraying pipes B 44 can be used for cleaning the body of the transport vehicle. The two grooves 42 are connected with the water inlet of the sedimentation tank through a drainage channel 50 at the end close to the water inlet of the sedimentation tank. In the specific implementation, the bottom of the two grooves 42 is higher than the ground and is sloped towards the drainage channel, the bottom of the drainage channel is connected with the bottom of the grooves 42 at one end and is connected with the ground of the water inlet of the sedimentation tank at the other end, so as to improve the water flow speed and prevent the sand and stones from settling in the grooves 42 and the drainage channel 50.

[0024] The sedimentation tank is integrally poured with concrete with a strength grade C30 and an impermeability grade not lower than P6, and the thickness of the tank body and the partition wall is 20-25 mm.

[0025] The sedimentation tank comprises a tank body 1, the bottom of which is at a height of -2.0 m, and the top of which is at a height of +0.25 m. The tank body 1 is divided into a sand setting unit, an inclined plate sedimentation unit, a straight plate sedimentation unit and a water outlet unit by an L-shaped partition wall 11, a first vertical partition wall 12 and a second vertical partition wall 13, the sand setting unit and the inclined plate sedimentation unit are connected through a water outlet 102 formed in the L-shaped partition wall 11, the inclined plate sedimentation unit and the straight plate sedimentation unit are connected through a first water passing hole 103 formed in the first vertical partition wall 12, and the straight plate sedimentation unit and the water outlet unit are connected through a second water passing hole 104 formed in the second vertical partition wall 13.

[0026] The grit chamber comprises a horizontal flow grit tank formed by the L-shaped partition wall 11 and the side wall of the tank body 1. Three baffles 15 are arranged in the tank along the water flow direction. The baffles 15 divide the tank into four sedimentation units. The side wall of the first sedimentation unit is provided with a wastewater inlet 101. The vertical side wall of the L-shaped partition wall 11 of the fourth sedimentation unit is provided with a water outlet 102. The bottom surface of the water outlet 102 is at the same level as the top surface of the horizontal side wall of the L-shaped partition wall 11, both at -0.30 meters.

[0027] In the embodiment, the vertical side wall of the L-shaped partition wall 11 and the side wall of the tank body 1 opposite to the vertical side wall are provided with slots extending to the inner bottom surface of the tank. The baffles 15 are inserted into the slots. The baffles 15 are preferably made of wood and provided with hand holes at the upper ends. The height of the baffles is 2 / 1-2 / 3 of the height of the tank. The specific value can be determined according to the designed wastewater flow rate, as long as the wastewater can flow over the upper end of the baffles without overflowing the tank body 1.

[0028] The inclined plate sedimentation unit is formed by the first vertical partition wall 12, the inclined plate 14, the side wall of the tank body and the bottom wall of the tank body. Two first water passing holes 103 with a side length of 20 cm are formed in the first vertical partition wall 12. The bottom surface of the first water passing holes is at -1.0 meters. The inclined plate 14 is inclined at 29° along the direction of the grit chamber to the straight plate sedimentation unit. The top surface of the inclined plate 14 is connected with the top surface of the horizontal side wall of the L-shaped partition wall 11, and the bottom surface is connected with the bottom surface of the tank body 1. The inclined plate 14, the first partition wall 12 and the ground of the tank body form a right trapezoidal sedimentation space. The side wall of the sedimentation space is provided with a sludge discharge port connected with a sludge discharge pump 32. The sludge discharge pump 32 is connected with the front end of the tank through a sludge discharge pipe 31. In the embodiment, the sludge discharge pipe 31 is vertically inserted into the first sedimentation unit of the tank.

[0029] The straight plate sedimentation unit is formed by the first vertical partition wall 12, the second vertical partition wall 13, the side wall of the tank body and the bottom wall of the tank body. Two second water passing holes 104 with a side length of 20 cm are formed in the second vertical partition wall 13. The bottom surface of the second water passing holes is at -1.8 meters.

[0030] The water outlet unit is formed by the second vertical partition wall 13, the side wall of the tank body and the bottom wall of the tank body. The bottom surface of the water outlet unit is provided with a water collecting pit with a size of 0.3*0.3 meters and a bottom level of -2.20 meters. A water outlet pipe 21 is arranged in the water collecting pit. The water outlet pipe 21 is fixed on the side wall of the tank body through a pipe support. The upper end of the water outlet pipe 21 extends out of the tank body and is connected with a water pump 22. The water pump 22 is installed on a support arm at the upper end of the outer side wall of the tank body. The outlet of the water pump is connected with four spray branch pipes of a spray chamber through a spray main pipe 41. A stop valve is arranged on each spray branch pipe for controlling the water flow. The four spray branch pipes are connected with two spray pipes A 43 and two spray pipes B 44.

[0031] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements are also within the protection scope of the present application.

Claims

1. A concrete plant wastewater utilization system, characterized by, The utility model provides a cleaning device for sewage treatment, which comprises a spraying room and a sedimentation tank, the sedimentation tank is arranged on one side of the spraying room, a cleaning ground is arranged in the spraying room, a groove is longitudinally arranged in the middle part of the cleaning ground, a spraying pipe A is arranged in the groove, and spraying pipes B are arranged on the two side walls of the spraying room; the sedimentation tank comprises a tank body, the tank body is divided into a sand setting unit, an inclined plate sedimentation unit, a straight plate sedimentation unit and a water outlet unit by a partition wall; the sand setting unit comprises a horizontal flow type sand setting groove, a water inlet is arranged at the front end of the sand setting groove, a water outlet is arranged at the rear end of the sand setting groove, the water outlet is communicated with the inclined plate sedimentation unit, an inclined plate is arranged in the inclined plate sedimentation unit, the top surface of the inclined plate is connected with the bottom surface of the sand setting groove, and the bottom surface of the inclined plate is connected with the bottom surface of the tank body; the inclined plate sedimentation unit and the straight plate sedimentation unit are communicated through a first water passing hole, the first water passing hole is arranged on a first partition wall for separating the inclined plate sedimentation unit and the straight plate sedimentation unit, the straight plate sedimentation unit and the water outlet unit are communicated through a second water passing hole, the second water passing hole is arranged on a second partition wall for separating the straight plate sedimentation unit and the water outlet unit, the bottom surface elevation of the first water passing hole is higher than the bottom surface elevation of the second water passing hole, and the top surface elevation of the first water passing hole is lower than the bottom surface elevation of the water outlet; a water outlet pipe is arranged in the water outlet unit, and the water outlet pipe is connected with a water pump; the water pump is connected with a plurality of spraying branch pipes through a spraying main pipe, the spraying branch pipes are connected with the spraying pipe A and the spraying pipe B respectively; the groove is communicated with the water inlet of the sand setting groove through a drainage channel; A plurality of baffles are arranged in the horizontal flow type sand setting groove along the water flow direction, the baffles separate the sand setting tank into a plurality of sedimentation units, and the waste water enters the sand setting tank through the water inlet, sequentially flows through the sedimentation units and then flows out from the water outlet; The inclination of the inclined plate in the inclined plate sedimentation unit is 20-35 DEG, the inclined plate, the first partition wall and the tank body ground form a right trapezoidal sedimentation space; a sludge discharge port is arranged at the bottom of the sedimentation space, the sludge discharge port is connected with a sludge pump, and the sludge pump is connected with the sand setting groove through a sludge pipe.

2. A concrete plant wastewater utilization system as in claim 1, wherein, A slot is arranged on the side wall of the horizontal flow type sand setting groove, and the baffle is inserted into the slot.

3. A concrete plant wastewater utilization system as in claim 2, wherein, The baffle is made of a wooden board, and a hand hole is arranged at the upper end of the baffle.

4. A concrete plant wastewater utilization system according to claim 1, wherein A supporting arm is arranged at the upper end of the outer side wall of the water outlet unit, the water pump is installed on the supporting arm, and the water inlet of the water pump is connected with the upper end opening of the water outlet pipe.

5. A concrete plant wastewater utilization system according to claim 1, wherein The cleaning ground is provided with a slope towards the middle part on both sides.

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