Cement production waste liquid treatment system

Abstract

The invention provides a cement production waste liquid treatment system which comprises a first filter tank, a second filter tank and a sedimentation tank which are sequentially arranged, a net rack with one end higher than the other end is erected in the first filter tank, and the lower end of the net rack extends into the second filter tank; the second filter tank and the first filter tank are provided with a first common wall, the net rack is erected on the first common wall, an overflow frame located below the net rack is further arranged on the first common wall, and a first filter plate located between the net rack and the overflow frame is further arranged in the first filter tank; the second filter tank and the sedimentation tank are provided with a second common wall, a second filter plate is further arranged between the first common wall and the second common wall, the upper end face of the second common wall is flush with the lower edge of the overflow frame, and the second filter plate is located below the overflow frame; the upper end face of the overflow wall is lower than the upper end face of the second common wall. The problem that in the prior art, the overall use and maintenance cost is high when the handling capacity is large is solved.

Description

Technical Field

[0001] The invention relates to the technical field of cement production auxiliary equipment, and in particular to a cement production waste liquid treatment system. Background Art

[0002] During the cement production process, a large amount of waste liquid is generated (such as washing liquid and washing wastewater in the raw material pretreatment and preheating system, as well as cooling water and washing water in the coal mill, raw material mill, cement mill and other systems, which contain high concentrations of suspended solids, larger particles of solid impurities, dissolved matter, organic matter, heavy metals and other pollutants), which need to be purified before being discharged or recycled as production and domestic water. In the prior art, cement production wastewater is generally treated by sedimentation. For example, a Chinese patent with authorization announcement number CN210915698U discloses a cement industry wastewater recycling system, which is arranged in a cement plant and includes a wastewater collection part, a wastewater treatment part connected to the wastewater collection part, and a wastewater output system connected to the wastewater treatment part; the wastewater collection part includes a wastewater collection tank, which is connected to a water inlet pipe; the wastewater treatment part includes a wastewater treatment tank, which is connected to the wastewater collection tank and is provided with a plurality of clean water channels; the wastewater output system includes a plurality of outlet pipes connected to the clean water channels, a pressure pump is connected to the outlet pipe, and the ports of the outlet pipes are connected to different water outlets, and the outlets include a water inlet of a circulating water pool located in the cement plant, a dust suppression nozzle located in a cement plant mine, a greening nozzle located in a green belt of the cement plant, and a water pipe for a sprinkler truck located on the road. The utility model can process wastewater in different grades and recycle it according to different grades, greatly improving the recycling rate of cement wastewater. In actual use, because the treatment volume involved is generally large, it is necessary to build a collection pool and a treatment pool with a large capacity, which often occupies a large area of ​​the factory and consumes a large amount of space resources in the factory. Deep digging the collection pool and the treatment pool can reduce the floor space, but similar to the large area, it will also face the problem of huge subsequent cleaning and maintenance engineering (it is necessary to clean up larger particles of solid impurities and sediments, and separate them for subsequent further treatment), so the overall use and maintenance costs are high. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a cement production waste liquid treatment system, which solves the problem of high overall use and maintenance costs when the treatment volume is large in the prior art.

[0004] According to an embodiment of the present invention, a cement production waste liquid treatment system includes a first filter tank, a second filter tank and a sedimentation tank arranged in sequence, wherein: a grid with one end higher than the other end is set up in the first filter tank, and the lower end of the grid extends into the second filter tank; the second filter tank and the first filter tank have a first common wall, the grid is set up on the first common wall, and an overflow frame located below the grid is also arranged on the first common wall, and a first filter plate located between the grid and the overflow frame is also arranged in the first filter tank; the second filter tank and the sedimentation tank have a second common wall, and a second filter plate is also arranged between the first common wall and the second common wall, the upper end surface of the second common wall is flush with the lower edge of the overflow frame, and the second filter plate is located below the overflow frame; an overflow wall with an upper end surface lower than the upper end surface of the second common wall is arranged in the sedimentation tank.

[0005] In the above embodiment, larger impurities (i.e., larger particles of solid impurities mixed in the waste liquid in the prior art) are separated by a grid and separated to the second filter tank, and smaller particles enter the first filter tank with the liquid and are filtered by the first filter plate. The liquid settles in the first filter tank, and then enters the second filter tank in an overflow manner and is filtered by the second filter plate, and then enters the sedimentation tank in an overflow manner again, and finally is separated in an overflow manner. During the whole process, a large amount of particulate impurities are intercepted and do not enter the sedimentation process, thereby reducing the sedimentation processing load, and achieving efficient waste liquid treatment through a smaller equipment area (or volume). At the same time, subsequent cleaning and maintenance are also more convenient, and the use and maintenance costs are reduced, thereby solving the problem of high overall use and maintenance costs when the processing volume is large in the prior art.

[0006] Furthermore, a first drain pipe is connected to the bottom of the sedimentation tank. The first drain pipe and the second common wall are respectively located on both sides of the overflow wall. A third filter plate located above the first drain pipe is also arranged in the sedimentation tank. A filter medium is also laid on the third filter plate.

[0007] Furthermore, the second filter plate is arranged obliquely and a higher end thereof is close to the first common wall.

[0008] Furthermore, it also includes a filter box, which is placed on the third filter plate and the grid frame can extend above a side of the filter box close to the first common wall.

[0009] Furthermore, a stopper is fixedly arranged between the second common wall and the second filter plate, and the lower end of the filter box on one side away from the first common wall abuts against the stopper so that the outer bottom surface of the filter box is separated from the second filter plate.

[0010] Furthermore, a first hanging ear is fixedly connected to the upper end surface of the filter box on the side away from the first common wall, and a pair of second hanging ears are fixedly connected to the end surfaces located on both sides of the first hanging ear.

[0011] Furthermore, the stopper has an inclined abutment surface, which is inclined and has a lower end connected to the second filter plate and a higher end connected to the second common wall. The filter box is provided with an abutment block that abuts against the inclined abutment surface. When the abutment block abuts against the lower end of the inclined abutment surface, the grid frame can be located directly above one side of the filter box, and when the abutment block abuts against the upper end of the inclined abutment surface, the grid frame can be staggered with the filter box.

[0012] Furthermore, a feed hopper located above the higher end of the grid is fixedly connected to the first filter tank.

[0013] Furthermore, the grid includes a plurality of cross bars which are arranged obliquely and parallel to each other, and a connecting rod which is fixedly connected between the lower sides of all the cross bars.

[0014] Furthermore, a support bar for overlapping the higher end of the grid is fixedly connected in the first filter tank, and the support bar is provided with a plurality of slots for one end of all the cross bars to be inserted into, and the first common wall is provided with a plurality of through grooves for the other ends of all the cross bars to pass through.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By setting up a grid, larger impurities are diverted to the second filter tank, and the liquid settles in the first filter tank, then enters the second filter tank in an overflow manner and is filtered by the second filter plate, then enters the sedimentation tank in an overflow manner again, and is finally diverted in an overflow manner. During the whole process, a large amount of particulate impurities are intercepted and do not enter the sedimentation process, thereby reducing the sedimentation processing load, and achieving efficient waste liquid treatment through a smaller equipment area (or volume). At the same time, subsequent cleaning and maintenance are also more convenient, and the use and maintenance costs are reduced, thereby solving the problem of high overall use and maintenance costs when the processing volume is large in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of a grid, support bars, and a first common wall portion according to an embodiment of the present invention;

[0019] Figure 3 for Figure 1 A schematic diagram of the enlarged local structure at center A;

[0020] Figure 4 for Figure 1 A magnified schematic diagram of the local structure at B in the middle;

[0021] In the above drawings:

[0022] The first filter tank 1, the second filter tank 2, the sedimentation tank 3, the grid 4, the first common wall 5, the overflow frame 6, the first filter plate 7, the second common wall 8, the second filter plate 9, the overflow wall 10, the cross bar 11, the connecting rod 12, the raceway 13, the filter box 14, the first drain pipe 15, the third filter plate 16, the filter medium 17, the outlet pool 18, the block 19, the first hanging ear 20, the second hanging ear 21, the inclined abutment surface 22, the support bar 23, the feed hopper 24, the bayonet 25, the through groove 26, and the second drain pipe 27. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] like Figure 1-4 As shown, this embodiment provides a cement production waste liquid treatment system, which includes a first filter tank 1, a second filter tank 2 and a sedimentation tank 3 arranged in sequence, wherein: a grid frame 4 with one end higher than the other end is set in the first filter tank 1, and the lower end of the grid frame 4 extends into the second filter tank 2; the second filter tank 2 and the first filter tank 1 have a first common wall 5, the grid frame 4 is set on the first common wall 5, and an overflow frame 6 located below the grid frame 4 is also arranged on the first common wall 5, and a first filter plate 7 located between the grid frame 4 and the overflow frame 6 is also arranged in the first filter tank 1; the second filter tank 2 and the sedimentation tank 3 have a second common wall 8, and a second filter plate 9 is further arranged between the first common wall 5 and the second common wall 8, the upper end surface of the second common wall 8 is flush with the lower edge of the overflow frame 6, and the second filter plate 9 is located below the overflow frame 6; an overflow wall 10 with an upper end surface lower than the upper end surface of the second common wall 8 is arranged in the sedimentation tank 3.

[0026] In the above embodiment, the grid 4 includes a plurality of inclined and mutually parallel cross bars 11, and a connecting rod 12 fixedly connected between the lower sides of all the cross bars 11, the connecting rod 12 is used to fix the cross bars 11, and an inclined rolling track 13 is formed between the cross bars 11 and the cross bars 11, and the width of the rolling track 13 is small, so that some large particles of impurities (i.e., large particles of solid impurities mixed in the waste liquid in the prior art) can roll along the rolling track 13 to a lower position into the second filter tank 2, and the connecting rod 12 is located at the bottom and does not affect the rolling track. 13 is operated normally, so that larger impurities are guided away by the grid frame 4 and guided away to the second filter tank 2, and smaller particles enter the first filter tank 1 with the liquid and are filtered by the first filter plate 7, and the filtered liquid settles in the first filter tank 1, and then enters the second filter tank 2 through the overflow frame 6 in an overflow manner and is filtered again by the second filter plate 9, and in the second filter tank 2, a filter box 14 is also provided, one side of which can be located below the grid frame 4, and the larger impurities of the guided material enter the filter box 14, and the liquid overflowing from the first filter tank 1 can be filtered again The impurities in the filter box 14 are immersed for the second time, which can soak the impurities in the filter box 14, so that a small amount of small particles attached to the impurities can also enter the liquid and settle to the bottom of the second filter tank 2 with the sedimentation of the liquid. The liquid then enters the sedimentation tank 3 again by overflow (in this process, a small amount of small particles on the impurities in the filter box 14 can also be brought to the sedimentation tank 3 for sedimentation). After a round of treatment, the filter box 14 can be taken out upwards. The impurities in the filter box 14 have good cleanliness and can be used as concrete additives as appropriate. The liquid in the sedimentation tank 3 is finally discharged by overflow. During the whole process, a large amount of granular impurities are intercepted and do not enter the sedimentation process below the first filter tank 1 and the second filter tank 2, thereby reducing the processing load of the sedimentation, and can achieve efficient waste liquid treatment through a smaller equipment area (or volume). At the same time, subsequent cleaning and maintenance are also more convenient, and the use and maintenance costs are reduced. Therefore, the problem of high overall use and maintenance costs when the processing volume is large in the prior art is solved.

[0027] like Figure 1As shown, a first drain pipe 15 is also connected to the bottom of the sedimentation tank 3, and the first drain pipe 15 and the second common wall 8 are respectively located on both sides of the overflow wall 10. A third filter plate 16 located above the first drain pipe 15 is also provided in the sedimentation tank 3, and a filter medium 17 is also laid on the third filter plate 16. A water outlet pool 18 is set in the sedimentation tank 3 through the overflow wall 10. The water on the side of the second common wall 8 in the sedimentation tank 3 overflows the overflow wall 10 and flows onto the filter medium 17. After double filtering treatment by the filter medium 17 and the third filter plate 16, it is discharged from the first drain pipe 15 below, thus completing the final treatment. The filter medium 17 provided can be cotton cloth, porous activated carbon, or filter mesh cloth in the prior art, etc., which is used to enhance the effect of intercepting small particle impurities, and finally make the effluent cleaner to ensure subsequent normal circulation. Similar to the prior art, it can be used for cleaning the transport vehicle by pressurizing the pump body.

[0028] like Figure 1-4As shown, the second filter plate 9 is inclined and its higher end is close to the first common wall 5, the bottom of the filter box 14 is also inclined, and a stopper 19 is fixedly arranged between the second common wall 8 and the second filter plate 9, the stopper 19 has an inclined abutment surface 22, the inclined abutment surface 22 is inclined and its lower end is connected to the second filter plate 9, and its higher end is connected to the second common wall 8, the filter box 14 is provided with a block that abuts against the inclined abutment surface 22, when the block abuts against the lower end of the inclined abutment surface 22, the grid frame 4 can be located directly above one side of the filter box 14, when the block abuts against the upper end of the inclined abutment surface 22, the grid frame 4 can be staggered with the filter box 14, and the lower end of the side of the filter box 14 away from the first common wall 5 abuts against the stopper 19 so that the outer side of the filter box 14 The bottom surface is separated from the second filter plate 9, and filter holes are provided on the side walls and the bottom of the filter box 14, so that liquid can flow in and out of the filter box 14. At the same time, the bottom of the filter box 14 and the second filter plate 9 are separated. A small amount of particulate impurities in the filter box 14 can pass through the bottom more smoothly and then pass through the second filter plate 9 below. At the same time, the heavier part can sink to the bottom, and the upper layer overflows over the overflow wall 10 to the sedimentation tank 3 in an overflow manner. The set block also makes it easier to take out the filter box 14. Specifically, a first hanging ear 20 is fixedly connected to the upper end surface of the filter box 14 on the side away from the first common wall 5, and a pair of second hanging ears 21 are fixedly connected to the end surfaces on both sides of the first hanging ear 20. The filter box 14 is lifted obliquely upward by the first hanging ear 20 so as to leave the bottom of the grid frame 4, and then the two second hanging ears 21 are used to finally lift it upward; in more detail, the second filter plate 9 and the bottom of the filter box 14 are set to be inclined, so that large particles of impurities fall downward after passing through the grid frame 4, and will roll to the lower part of the filter box 14, and then approach the higher side, so that more impurities can enter. At the same time, the liquid enters from the side close to the first common wall 5 and leaves from the top of the second common wall 8. During the process, it passes a distance, so that the sedimentation can proceed smoothly; in a more detailed scheme, the first filter plate 7 is also set obliquely, similar to the second filter plate 9 and the third filter plate 16, and can Through the overlapping of support bars 23 (support bars 23 are also provided in the first filter tank 1 for overlapping of the grid 4), the higher end of the first filter plate 7 is connected to the first common wall 5, so that the impurities thereon gather toward the lower side. At the same time, a feed hopper 24 located above the higher end of the grid 4 is fixedly connected to the first filter tank 1. After the waste liquid enters through the feed hopper 24, the liquid will directly pass through the grid 4 to the first filter plate 7, and then settle downward. There is also a distance to the overflow frame 6, so that the sedimentation can proceed smoothly. On the first filter plate 7, the impurities are deposited obliquely upward from the lower side component, and will not move quickly to the side of the overflow frame 6, so as to avoid entering the subsequent steps through the overflow frame 6.

[0029] like Figure 1 , 2As shown, a plurality of slots 25 for one end of all the cross bars 11 to be inserted into are provided on the support bars 23 for overlapping the grid 4, and a plurality of through grooves 26 for the other ends of all the cross bars 11 to pass through are provided on the first common wall 5, so that the grid 4 can be relatively stably installed between the first filter pool 1 and the second filter pool 2 (the grid 4 is inclined and has a tendency to slide down to the lower end, but a connecting rod 12 provided below the lower end can be against the side of the first common wall 5, so that the grid 4 can be more stable without affecting normal disassembly and installation), and such an installation is also convenient for disassembly (the filter box 14, the first filter plate 7, the second filter plate 9, the filter medium 17 and the third filter plate 16 are all convenient for disassembly), and subsequent cleaning and maintenance are also relatively easy to carry out; in more detail, a second drain pipe 27 is provided at the bottom of the first filter pool 1 and the second filter pool 2 for thoroughly draining the liquid from their bottoms later (such as after cleaning the bottom sedimentation).

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A cement production waste liquid treatment system, characterized in that: It comprises a first filter tank, a second filter tank and a sedimentation tank which are arranged in sequence, wherein: a grid with one end higher than the other end is set up in the first filter tank, and the lower end of the grid extends into the second filter tank; the second filter tank and the first filter tank have a first common wall, the grid is set up on the first common wall, an overflow frame located below the grid is also set up on the first common wall, and a first filter plate located between the grid and the overflow frame is also set up in the first filter tank; the second filter tank and the sedimentation tank have a second common wall, a second filter plate is also set up between the first common wall and the second common wall, the upper end surface of the second common wall is flush with the lower edge of the overflow frame, and the second filter plate is located below the overflow frame; an overflow wall with an upper end surface lower than the upper end surface of the second common wall is set up in the sedimentation tank.

2. The cement production waste liquid treatment system according to claim 1, characterized in that: The bottom of the sedimentation tank is also connected to a first drainage pipe, and the first drainage pipe and the second common wall are respectively located on both sides of the overflow wall. The sedimentation tank is also provided with a third filter plate located above the first drainage pipe, and a filter medium is also laid on the third filter plate.

3. The cement production waste liquid treatment system according to claim 1, characterized in that: The second filter plate is arranged obliquely, and a higher end thereof is close to the first common wall.

4. The cement production waste liquid treatment system according to claim 3, characterized in that: It also includes a filter box, which is placed on the third filter plate and the grid can extend above a side of the filter box close to the first common wall.

5. The cement production waste liquid treatment system according to claim 4, characterized in that: A stopper is fixedly arranged between the second common wall and the second filter plate, and the lower end of the filter box on the side away from the first common wall abuts against the stopper so that the outer bottom surface of the filter box is separated from the second filter plate.

6. The cement production waste liquid treatment system according to claim 5, characterized in that: A first hanging ear is fixedly connected to the upper end surface of the filter box on the side away from the first common wall, and a pair of second hanging ears are fixedly connected to the end surfaces located on both sides of the first hanging ear.

7. The cement production waste liquid treatment system according to claim 6, characterized in that: The stop block has an inclined abutment surface, which is inclined and has a lower end connected to the second filter plate and a higher end connected to the second common wall. The filter box is provided with a stop block that abuts against the inclined abutment surface. When the stop block abuts against the lower end of the inclined abutment surface, the grid can be located directly above one side of the filter box. When the stop block abuts against the upper end of the inclined abutment surface, the grid can be staggered with the filter box.

8. The cement production waste liquid treatment system according to any one of claims 1 to 7, characterized in that: The first filter tank is also fixedly connected with a feed hopper located above the higher end of the grid.

9. The cement production waste liquid treatment system according to claim 8, characterized in that: The grid comprises a plurality of cross bars which are arranged obliquely and parallel to each other, and a connecting rod which is fixedly connected between the lower sides of all the cross bars.

10. The cement production waste liquid treatment system according to claim 9, characterized in that: A support bar for overlapping the higher end of the grid is fixedly connected in the first filter tank, and the support bar is provided with a plurality of slots for one end of all the cross bars to be inserted respectively, and the first common wall is provided with a plurality of through grooves for the other ends of all the cross bars to pass through respectively.

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