A device for treating landfill leachate membrane concentrate

Abstract

The scheme discloses a landfill leachate membrane concentrated liquid treatment device, including an evaporation mechanism and a pretreatment mechanism, the pretreatment mechanism includes a treatment box, the treatment box is fixedly connected on the evaporation mechanism, the treatment box is equipped with a water outlet, and the water outlet of the treatment box is communicated with the evaporation mechanism, a rotating drum and a rotating shaft are rotatably connected in the treatment box, the rotating shaft is connected with a first motor for driving the rotating shaft to rotate, the rotating shaft is located at the eccentric position in the rotating drum, a plurality of partition plates are arranged on the rotating shaft, a plurality of gaps are arranged on the rotating drum, and the plurality of partition plates penetrate the gaps respectively. The pretreatment mechanism is arranged, the landfill leachate membrane concentrated liquid is pretreated before evaporation, and the possibility of scale formation of the evaporation device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of leachate treatment equipment, in particular to a landfill leachate membrane concentrate treatment device. BACKGROUND

[0002] Landfill leachate is a black or yellowish-brown liquid with a foul odor, and contains a large amount of organic matter and inorganic matter, including various refractory organic matter (such as various aromatic compounds and humus), inorganic salts (such as ammonium, carbonate and sulfate), and metal ions (such as chromium, lead and copper).

[0003] Compared with ordinary landfill leachate, the leachate membrane concentrate is more difficult to treat and more harmful due to the enrichment of a large amount of refractory organic matter, inorganic salts and trace heavy metals. The treatment of leachate membrane concentrate includes biological treatment method, physical and chemical treatment method, land treatment method and evaporation treatment method. Among them, the evaporation treatment method is often used for pure water production and deep concentration of wastewater generated by chemical industry. Due to the high pollution and high hazard nature of leachate, in recent years, many countries have begun to use evaporation systems to dispose leachate.

[0004] Evaporation treatment method is a kind of treatment method which is easy to operate, but the cost is high and the demand for energy is high. It uses heating and provides negative pressure to the system to evaporate the water in the leachate. The water vapor is collected in the storage tank through the cooling system, and the concentrated liquid continues to concentrate to the thick slurry state, and then uses the dehydration system to make it lose water and become a dry slag state. However, the existing evaporation treatment device pretreats the leachate membrane concentrate before putting it into the evaporation device, which leads to poor evaporation effect and easy scaling in the evaporation device. SUMMARY

[0005] The present application aims to provide a landfill leachate membrane concentrate treatment device to solve the problem of easy scaling of the existing evaporation device.

[0006] The landfill leachate membrane concentrate treatment device in the present application comprises an evaporation mechanism and a pretreatment mechanism, the pretreatment mechanism comprises a treatment box, the treatment box is fixedly connected to the evaporation mechanism, a water outlet is arranged on the treatment box, the water outlet of the treatment box is communicated with the evaporation mechanism, a rotating drum and a rotating shaft are rotatably connected in the treatment box, the rotating shaft is connected with a first motor for driving the rotating shaft to rotate, the rotating shaft is located at the eccentric position in the rotating drum, a plurality of partition plates are arranged on the rotating shaft, a plurality of gaps are arranged on the rotating drum, and the plurality of partition plates respectively penetrate the gaps.

[0007] The working principle and beneficial effects of the present scheme are as follows: when in use, the percolate membrane concentrate is added into the rotating drum, the chemical agent is added, the first motor is started at the same time of adding the percolate membrane concentrate, the first motor drives the rotating shaft to rotate, the rotating shaft drives the baffle to rotate, thereby agitating the percolate membrane concentrate in the rotating drum, so that the percolate membrane concentrate is fully contacted with air, and further aeration is performed, if the chemical agent is added, the chemical agent can also be fully mixed with the percolate membrane concentrate, because the rotating shaft is located at the eccentric position in the rotating drum, therefore the baffle is always located in the gap, the baffle slides back and forth in the gap in the process of rotation, the baffle in the gap drives the rotating drum to rotate when rotating, and the baffle slides out of the gap, the percolate membrane concentrate can slide out of the gap, and then the percolate membrane concentrate gradually flows into the evaporation mechanism from the water outlet of the treatment box. After the percolate membrane concentrate is first aerated and fully mixed with the chemical agent in the rotating drum, the percolate membrane concentrate gradually flows into the evaporation mechanism from the water outlet, so that the flocculation material prone to scaling is removed in advance, the percolate membrane concentrate is fully mixed with air after aeration, organic matter is decomposed into inorganic matter, and then evaporation is performed, so that the scaling is reduced.

[0008] Further, one side of the treatment box is fixedly connected with a low water outlet pipe, and the other side of the treatment box is fixedly connected with a high water outlet pipe. In this way, when the percolate membrane is located at a high position in the treatment box, water can be discharged through the two water outlet pipes, and the water discharge speed is accelerated.

[0009] Further, the low water outlet pipe is provided with an electromagnetic valve for opening and closing the low water outlet pipe. The electromagnetic valve is arranged to control the opening and closing of the low water outlet pipe, and the electromagnetic valve is closed when the percolate membrane concentrate does not need to enter the evaporation mechanism.

[0010] Further, the baffles are uniformly provided with holes. The holes can increase the contact between the percolate membrane and air.

[0011] Further, the bottom of the treatment box is fixedly connected with an aerator, and the aerator is located in the rotating drum. The aerator can oxygenate, agitate and mix the percolate membrane concentrate.

[0012] Further, the evaporation mechanism comprises an evaporation box, a heating disc is arranged in the evaporation box, the water outlet extends into the evaporation box and is located above the heating disc, the heating disc is connected with a second motor for driving the rotation of the heating disc, a notch is arranged on the heating disc, a convex strip is arranged at the notch, one side of the convex strip is vertically and slidingly connected with one side of the notch, a scraper is rotatably connected to the evaporation box, and the scraper is connected with a third motor for driving the rotation of the scraper.

[0013] Further, the evaporation box is connected with a steam pipe, and the steam pipe is connected with a storage box. The water vapor generated by heating enters the storage box from the steam pipe for storage. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of a landfill leachate membrane concentrate treatment device of the present application;

[0015] Figure 2 is Figure 1 a top view of the heating disc in the evaporation box;

[0016] Figure 3 is Figure 2 a side view of the convex strip in the evaporation box. DETAILED DESCRIPTION

[0017] The following will be further described in detail through specific embodiments:

[0018] The reference signs in the drawings of the specification include: a treatment box 1, a rotating drum 2, a partition plate 3, a hole 4, a rotating shaft 5, a gap 6, a high water outlet pipe 7, a first motor 8, an aerator 9, a low water outlet pipe 10, a water collecting box 11, an evaporation box 12, a second motor 13, a heating disc 14, a scraper 15, a third motor 16, a steam pipe 17, a storage box 18, a notch 19, and a convex strip 20.

[0019] The embodiments are basically as shown in the accompanying drawings: Figure 1 , Figure 2 and Figure 3 A landfill leachate membrane concentrate treatment device comprises an evaporation mechanism and a pretreatment mechanism.

[0020] The evaporation mechanism comprises an evaporation box 12, a heating disc 14 arranged in the evaporation box 12, a water outlet extending into the evaporation box 12 and located above the heating disc 14, a second motor 13 fixedly connected to the evaporation box 12, an output shaft of the second motor 13 penetrating through the top of the evaporation box 12 and fixedly connected to the heating disc 14, a notch 19 arranged on the heating disc 14, a convex strip 20 arranged at the notch 19, an arc-shaped upper surface of the convex strip 20, the convex strip 20 being vertically slidably connected to one side of the notch 19, the highest end of the arc-shaped surface of the convex strip 20 being close to one end of the convex strip 20 vertically slidably connected to the notch 19, a scraper 15 rotatably connected to the evaporation box 12, a third motor 16 fixedly connected to the evaporation box 12, an output shaft of the third motor 16 penetrating through the side wall of the evaporation box 12 and fixedly connected to the scraper 15, a steam pipe 17 communicated with the evaporation box 12, and a storage box 18 communicated with the steam pipe 17.

[0021] The pretreatment mechanism comprises a treatment box 1 fixedly connected to the evaporation box 12, a low water outlet pipe 10 fixedly connected to one side of the treatment box 1, an electromagnetic valve arranged on the low water outlet pipe 10 and used for opening and closing the low water outlet pipe 10, a tlc controller electrically connected to the electromagnetic valve and used for controlling the opening and closing of the electromagnetic valve, a high water outlet pipe 7 fixedly connected to the other side of the treatment box 1, a water collecting box 11 communicated between the low water outlet pipe 10 and the high water outlet pipe 7, a water outlet arranged on the water collecting box 11, the water collecting box 11 being located in the evaporation box 12, a rotating drum 2 and a rotating shaft 5 rotatably connected in the treatment box 1, a first motor 8 fixedly connected to the bottom of the treatment box 1, an output shaft of the first motor 8 fixedly connected to the rotating shaft 5, the rotating shaft 5 being located at an eccentric position in the rotating drum 2, a plurality of partition plates 3 arranged on the rotating shaft 5, a plurality of holes 4 uniformly arranged on each partition plate 3, a plurality of gaps 6 arranged on the rotating drum 2, and the plurality of partition plates 3 penetrating through the gaps 6 respectively, an aerator 9 fixedly connected to the bottom of the treatment box 1 and located in the rotating drum 2.

[0022] In use, first close the electromagnetic valve, add the percolate membrane concentrate into the rotary drum 2, add the chemical agent, open the first motor 8 while adding the percolate membrane concentrate, the first motor 8 rotates to drive the rotating shaft 5 to rotate, the rotating shaft 5 rotates to drive the baffle 3 to rotate, thereby agitating the percolate membrane concentrate in the rotary drum 2, so that the percolate membrane concentrate is fully contacted with air, further aeration is carried out, the hole 4 can increase the contact of the percolate membrane with air, the aerator 9 can oxygenate, agitate and mix the percolate membrane concentrate, if the chemical agent is added, the chemical agent can also be fully mixed with the percolate membrane concentrate, because the rotating shaft 5 is located at the eccentric position in the rotary drum 2, therefore the baffle 3 is always located in the gap 6, the baffle 3 slides in the gap 6 in the process of rotation, the baffle 3 located in the gap 6 can drive the rotary drum 2 to rotate in the process of rotation, and the baffle 3 slides out of the gap 6, the percolate membrane concentrate can slide out of the gap 6, open the electromagnetic valve, then the percolate membrane concentrate gradually flows from the low water outlet pipe 10 into the water collecting box 11, and then flows from the water outlet of the water collecting box 11 into the heating disc 14, when the percolate membrane is located at a high position in the treatment box 1, the high water outlet pipe 7 can also carry out water outlet to accelerate the water outlet speed, open the second motor 13 to drive the heating disc 14 to rotate, after the heating disc 14 is heated, the percolate membrane concentrate forms solid concentrate, then open the third motor 16 to drive the scraper 15 to rotate, so that the bottom surface of the scraper 15 is in contact with the upper surface of the heating disc 14, thereby scraping the solid concentrate from the heating disc 14, the protrusion 20 blocks the gap 19 when no external force is received, the protrusion 20 moves downward when being pressed by the scraper 15, the gap 19 is no longer blocked, and the solid concentrate slides out of the gap 19. The percolate membrane concentrate is first aerated in the rotary drum 2 and then gradually flows into the evaporation mechanism from the water outlet after being fully mixed with the chemical agent, so that the flocculation material which is easy to scale is removed in advance, the percolate membrane concentrate is fully mixed with air after aeration, organic matter is decomposed into inorganic matter, then evaporation is carried out, so that the scaling is reduced, and then the solid concentrate is directly sent out from the gap 19 by the scraper 15.

[0023] The above is only an embodiment of the present application, and the specific structure and characteristics in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be regarded as the protection scope of the present application, and these will not affect the effect and practicality of the patent. The protection scope claimed in the present application should be subject to the content of the claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A device for treating landfill leachate membrane concentrate, characterized by: The utility model relates to a kind of evaporative mechanism and pretreatment mechanism, the pretreatment mechanism includes processing box, the processing box is fixedly connected on evaporative mechanism, water outlet is equipped on the processing box, and the water outlet of processing box is communicated with evaporative mechanism, rotatingly connected with drum and rotating shaft in processing box, the rotating shaft is connected with the first motor of driving its rotation, the rotating shaft is located eccentric position in drum, the rotating shaft is equipped with multiple partitions, the drum is equipped with multiple gaps, multiple The partition respectively penetrates gap;The bottom of the processing box is fixedly connected with aerator, and the aerator is located in drum.

2. The device for treating landfill leachate membrane concentrate according to claim 1, characterized in that: One side of the processing box is fixedly connected with low water outlet pipe, and the other side of the processing box is fixedly connected with high water outlet pipe.

3. The device for treating landfill leachate membrane concentrate according to claim 2, characterized in that: The low water outlet pipe is equipped with solenoid valve for opening and closing low water outlet pipe.

4. The device for treating landfill leachate membrane concentrate according to claim 3, characterized in that: The partition is uniformly distributed with hole.

5. The device for treatment of landfill leachate membrane concentrate according to claim 4, characterized in that: The evaporative mechanism includes evaporative box, heating disc is equipped in evaporative box, water outlet extends to evaporative box, and is located above heating disc, the heating disc is connected with the second motor of driving its rotation, the heating disc is equipped with notch, the notch is equipped with convex strip, one side of the convex strip is vertically slidingly connected with one side of the notch, the evaporative box is rotatably connected with scraper, and the scraper is connected with the third motor of driving its rotation.

6. The device for treatment of landfill leachate membrane concentrate according to claim 5, characterized in that: The evaporative box is communicated with steam pipe, and the steam pipe is communicated with storage box.

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