Reclaimed water circulating device for cement production

Abstract

The utility model belongs to the technical field of cement production, and particularly relates to a reclaimed water circulating device for cement production, which comprises a reservoir and a filter pressing box, the filter pressing box is arranged above the reservoir, a solid-liquid separation device is arranged between the reservoir and the filter pressing box, and a filter pressing device is arranged in the filter pressing box. According to the reclaimed water circulating device for cement production, cement slurry ground by a cement grinding mill is discharged into the filter pressing box, then a hydraulic air cylinder is started to push a compression plate to move downwards, and water in the slurry is compressed and discharged in cooperation with water filtering holes formed in a filter plate, so that subsequent roasting of slurry blocks is facilitated, and cement clinker is generated; the driving motor is started to drive the rotating shaft to rotate in the fixed bearing, so that the separation auger on the outer surface of the rotating shaft is driven to rotate, liquid in the slurry is extruded and discharged through the water filtering holes formed in the outer surface of the separation auger, solid-liquid separation of the slurry is achieved, and the slurry is filtered.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production, in particular to a reclaimed water circulation device for cement production. Background Art

[0002] In the cement production process, the wet process cement production method has been widely used due to less dust, high degree of material grinding and uniform mixing. The process of wet process cement production is: add water to raw material powder and grind it into slurry in cement mill, and then feed the slurry into rotary kiln for roasting to produce clinker. Since the slurry fed into the rotary kiln has a high water content, additional heat is required to dry the slurry. In addition, a large amount of water resources are consumed in the process of material grinding, and there is wastewater discharge, which does not meet the basic requirements of energy conservation and emission reduction in modern production.

[0003] For example, Chinese patent announcement No. CN211513726U discloses a reclaimed water recycling system for cement production. When in use, raw material powder is added with water and ground into slurry in a cement mill. After grinding, the slurry flows out from the right end of the cement mill. When flowing through the osmotic dehydration mechanism, a large amount of water passes through the first filter screen and flows into the first water storage chamber, and then flows into the water storage tank through the first guide pipe; the slurry that has undergone preliminary dehydration flows into the centrifugal dehydration mechanism, and the slurry slides down on the second filter screen. During the sliding process, the transmission rod drives the second filter screen to rotate through the connecting frame, so that the water in the slurry penetrates the first filter screen and flows into the first water storage chamber. The slurry passes through the second filter and is thrown out. The dehydrated slurry falls from the discharge pipe. The thrown-out water falls into the second water storage chamber and then enters the water storage tank through the second guide pipe. The slurry is then driven upward by the conveying mechanism and falls into the filter press and water removal mechanism at the top of the conveying mechanism. After the slurry is dehydrated by the filter press in the filter press and water removal mechanism, the squeezed water passes through the support net and falls into the third water storage chamber and then enters the water storage tank through the third guide pipe driven by the first booster pump. The compacted slurry blocks fall onto the support net, and the staff transports the slurry blocks into the kiln for roasting to generate cement clinker by carrying the support net.

[0004] However, the reclaimed water recycling system for cement production in the above application will generate a large amount of dust when the raw meal is ground with water, so it is necessary to spray water to reduce the dust. The circulating water in the device contains a lot of mud, which may clog the water spray pipe when reducing dust through the water spray pipe. Therefore, there are certain limitations.

[0005] For this reason, we urgently need to provide a kind of reclaimed water circulation device for cement production. Utility Model Content

[0006] The purpose of the utility model is to provide a reclaimed water circulation device for cement production, so as to solve the problem that the reclaimed water circulation system for cement production proposed in the above-mentioned background technology will generate a large amount of dust when adding water to the raw material powder for slurry grinding, so it is also necessary to spray water to reduce the dust, and the circulating water in the device contains more mud, which may clog the water spray pipe when reducing dust through the water spray pipe.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reclaimed water circulation device for cement production, comprising a water reservoir and a filter press box, wherein the filter press box is installed above the water reservoir, a solid-liquid separation device is installed between the water reservoir and the filter press box, and a filter press device is arranged inside the filter press box.

[0008] The solid-liquid separation device includes a separation tank, a drive motor, a fixed bearing, a rotating shaft, and a separation auger. The separation tank is installed between a water reservoir and a filter press box, the drive motor is installed on the left outer surface of the separation tank, the fixed bearing is installed inside the left outer surface of the separation tank, the rotating shaft is connected to the output end of the drive motor and is rotatably connected to the inside of the fixed bearing, and the separation auger is fixedly connected to the outside of the rotating shaft.

[0009] A further improvement is that the outer surface of the separation auger is evenly penetrated with water filtering holes, and the separation tank is a conical structure. When the slurry after filtering inside the filter press box is discharged into the separation tank, the drive motor is started to drive the rotating shaft to rotate inside the fixed bearing, thereby driving the separation auger on the outer surface of the rotating shaft to rotate, and the liquid in the slurry is squeezed out through the water filtering holes on its outer surface, thereby realizing solid-liquid separation of the slurry and filtering the slurry.

[0010] A further improvement is that a drainage pipe is fixedly connected to the left side of the bottom of the separation tank, and a mud discharge pipe is fixedly connected to the right side of the bottom of the separation tank. The compressed slurry is discharged into the water reservoir through the drainage pipe, and the separated mud residue is discharged through the mud discharge pipe.

[0011] A further improvement is that the filter pressing device comprises a filter pressing unit and a material pushing unit.

[0012] The filter press unit includes a hydraulic cylinder, a compression plate, a filter plate, and a connecting pipe. The hydraulic cylinder is installed at the top center of the filter press box, and its bottom extends into the interior of the filter press box. The compression plate is fixedly connected to the bottom of the hydraulic cylinder and slidably connected to the inner wall of the filter press box. The filter plate is fixedly connected to the lower part of the interior of the filter press box, and its upper surface is also evenly penetrated with water filter holes. The connecting pipe is fixedly connected to the bottom center of the filter press box, and its bottom extends into the interior of the separation tank. The cement slurry ground by the cement mill is discharged into the interior of the filter press box. Then the hydraulic cylinder is started to push the compression plate downward, and the water filter holes opened on the filter plate are used to compress and discharge the water in the slurry, so as to facilitate the subsequent roasting of the slurry blocks to generate cement clinker. The slurry water filtered out is discharged into the interior of the separation tank through the connecting pipe for solid-liquid separation and filtration.

[0013] A further improvement is that the pushing unit includes a pushing cylinder, a pushing plate, and a sealed box door. The pushing cylinder is installed on the front side of the filter press box, and its rear end extends into the interior of the filter press box. The pushing plate is fixedly connected to the rear end of the pushing cylinder, and the sealed box door is hinged to the back side of the filter press box. After the slurry is compressed, the sealed box door is opened, and the pushing cylinder is started to push the pushing plate backward, thereby pushing the slurry block out. No manpower is required for discharging, which is more convenient, quick and labor-saving.

[0014] A further improvement is that a partition plate is fixedly connected to the inner center of the water reservoir, a stepped filter plate is installed on the inner left side of the water reservoir, and the upper surfaces of the two steps on the right side are also penetrated with water filtering holes, an overflow hole is penetrated through the inner center of the partition plate, a suction pipe is fixedly connected to the middle and lower part of the right side of the back of the water reservoir, and observation windows are respectively installed on the left and right sides of the front of the water reservoir.

[0015] A further improvement is that the diameters of the filter holes opened on the surfaces of the filter plate, separation auger and stepped filter plate are gradually reduced, and filter nets are installed inside the overflow hole and the pumping pipe respectively. The slurry water after solid-liquid separation and filtration falls onto the stepped filter plate, and then is filtered for a second time through the filter holes opened on the stepped filter plate. The filtered slurry water is precipitated on the left side of the water reservoir until the water level is higher than the overflow hole. The circulating water after static sedimentation is discharged into the right side of the water reservoir through the overflow hole. The filter net arranged inside filters the circulating water for a third time, and then the water is pumped out through the pumping pipe for recycling. The turbidity of the water on the left and right sides of the water reservoir can be observed in real time through the observation window.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The reclaimed water circulation device for cement production discharges cement slurry ground by cement mill into the filter press box, then starts the hydraulic cylinder to push the compression plate downward, and cooperates with the water filter holes opened on the filter plate to compress and discharge the water in the slurry, so as to facilitate the subsequent roasting of the slurry block to generate cement clinker.

[0018] 2. The reclaimed water circulation device used in cement production starts the driving motor to drive the rotating shaft to rotate inside the fixed bearing, thereby driving the separation auger on the outer surface of the rotating shaft to rotate, and the liquid in the slurry is squeezed out through the water filter holes opened on its outer surface, thereby realizing the solid-liquid separation of the slurry and filtering the slurry.

[0019] 3. The reclaimed water circulation device used for cement production, after solid-liquid separation filtration, the slurry water falls onto the stepped filter plate, and then is filtered twice through the filter holes on the stepped filter plate. The filtered slurry water is precipitated on the left side of the water reservoir until the water level is higher than the overflow hole. The circulating water after static sedimentation is discharged into the right side of the water reservoir through the overflow hole. The filter net arranged inside the device filters the circulating water for the third time, and then it is pumped out through the pumping pipe for recycling, so as to avoid clogging of the water pipe due to excessive impurities in the water body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view structural schematic diagram of the utility model;

[0021] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0022] Figure 3 It is an independent cross-sectional structural schematic diagram of the solid-liquid separation device of the utility model;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the filter press device of the utility model;

[0024] Figure 5 It is a schematic diagram of an independent cross-sectional structure of a water storage tank of the utility model.

[0025] In the figure: 1. water reservoir; 2. filter press box; 301. separation tank; 302. drive motor; 303. fixed bearing; 304. rotating shaft; 305. separation auger; 306. drain pipe; 307. mud discharge pipe; 401. hydraulic cylinder; 402. compression plate; 403. filter plate; 404. connecting pipe; 405. push cylinder; 406. push plate; 407. sealed box door; 501. partition plate; 502. stepped filter plate; 503. overflow hole; 504. suction pipe; 505. observation window; 506. filter screen. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0028] Embodiment 1:

[0029] A reclaimed water circulation device for cement production comprises a water reservoir 1 and a filter press box 2. The filter press box 2 is installed above the water reservoir 1. A solid-liquid separation device is installed between the water reservoir 1 and the filter press box 2. A filter press device is arranged inside the filter press box 2.

[0030] The solid-liquid separation device includes a separation tank 301, a driving motor 302, a fixed bearing 303, a rotating shaft 304, and a separation auger 305. The separation tank 301 is installed between the water reservoir 1 and the filter press box 2, the driving motor 302 is installed on the left outer surface of the separation tank 301, the fixed bearing 303 is installed inside the left outer surface of the separation tank 301, the rotating shaft 304 is connected to the output end of the driving motor 302, and is rotatably connected to the inside of the fixed bearing 303, and the separation auger 305 is fixedly connected to the outside of the rotating shaft 304.

[0031] The outer surface of the separation auger 305 is evenly penetrated with water filtering holes, and the separation tank 301 is a conical structure. When the slurry after filtering inside the filter press box 2 is discharged into the separation tank 301, the drive motor 302 is started to drive the rotating shaft 304 to rotate inside the fixed bearing 303, thereby driving the separation auger 305 on the outer surface of the rotating shaft 304 to rotate, and the liquid in the slurry is squeezed out through the water filtering holes on its outer surface, thereby realizing solid-liquid separation of the slurry and filtering the slurry.

[0032] A drainage pipe 306 is fixedly connected to the left side of the bottom of the separation tank 301 , and a mud discharge pipe 307 is fixedly connected to the right side of the bottom of the separation tank 301 . The compressed slurry is discharged into the water reservoir 1 through the drainage pipe 306 , and the separated mud residue is discharged through the mud discharge pipe 307 .

[0033] The filter press device comprises a filter press unit.

[0034] The filter press unit includes a hydraulic cylinder 401, a compression plate 402, a filter plate 403, and a connecting pipe 404. The hydraulic cylinder 401 is installed at the top center of the filter press box 2, and its bottom extends into the interior of the filter press box 2. The compression plate 402 is fixedly connected to the bottom of the hydraulic cylinder 401 and is slidably connected to the inner wall of the filter press box 2. The filter plate 403 is fixedly connected to the lower part of the interior of the filter press box 2, and its upper surface is also uniformly penetrated with water filter holes. The connecting pipe 404 is fixedly connected to the bottom center of the filter press box 2, and its bottom extends into the interior of the separation tank 301. The cement slurry ground by the cement mill is discharged into the interior of the filter press box 2. Then, the hydraulic cylinder 401 is started to push the compression plate 402 downward, and the water in the slurry is compressed and discharged in cooperation with the water filter holes opened on the filter plate 403, so as to facilitate the subsequent roasting of the slurry blocks to generate cement clinker. The slurry water filtered out is discharged into the interior of the separation tank 301 through the connecting pipe 404 for solid-liquid separation and filtration.

[0035] A partition plate 501 is fixedly connected to the inner center of the water reservoir 1, a stepped filter plate 502 is installed on the inner left side of the water reservoir 1, and the upper surfaces of the two steps on the right side are also penetrated with water filtering holes, an overflow hole 503 is penetrated through the inner center of the partition plate 501, a suction pipe 504 is fixedly connected to the lower middle part of the right side of the back of the water reservoir 1, and observation windows 505 are respectively installed on the left and right sides of the front of the water reservoir 1.

[0036] The diameters of the water filtering holes opened on the surfaces of the filter plate 403, the separation auger 305 and the stepped filter plate 502 are gradually reduced, and filter screens 506 are installed inside the overflow hole 503 and the pumping pipe 504 respectively. The slurry water after solid-liquid separation and filtration falls onto the stepped filter plate 502, and then is filtered for a second time through the water filtering holes opened on the stepped filter plate 502. The filtered slurry water is precipitated on the left side of the water reservoir 1 until the water level is higher than the overflow hole 503. The circulating water after static precipitation is discharged into the right side of the water reservoir 1 through the overflow hole 503. The filter screen 506 arranged inside it filters the circulating water for a third time, and then it is pumped out through the pumping pipe 504 for recycling. The turbidity of the water on the left and right sides of the water reservoir 1 can be observed in real time through the observation window 505.

[0037] Embodiment 2:

[0038] On the basis of Example 1, the filter press device includes a pushing unit, which includes a pushing cylinder 405, a pushing plate 406, and a sealed box door 407. The pushing cylinder 405 is installed on the front of the filter press box 2, and its rear end extends into the interior of the filter press box 2. The pushing plate 406 is fixedly connected to the rear end of the pushing cylinder 405, and the sealed box door 407 is hinged to the back of the filter press box 2.

[0039] After the slurry is compressed, the sealed box door 407 is opened, and the pushing cylinder 405 is started to push the pushing plate 406 backward, so that the slurry block is pushed out, and no manpower is required for discharging, which is more convenient, fast and labor-saving.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A reclaimed water circulation device for cement production, comprising a water reservoir (1) and a filter press box (2), wherein the filter press box (2) is installed above the water reservoir (1), and is characterized in that: A solid-liquid separation device is installed between the water reservoir (1) and the filter press box (2), and a filter press device is arranged inside the filter press box (2); The solid-liquid separation device comprises a separation tank (301), a driving motor (302), a fixed bearing (303), a rotating shaft (304), and a separation auger (305); the separation tank (301) is installed between the water reservoir (1) and the filter press box (2); the driving motor (302) is installed on the left outer surface of the separation tank (301); the fixed bearing (303) is installed inside the left outer surface of the separation tank (301); the rotating shaft (304) is connected to the output end of the driving motor (302) and is rotatably connected to the inside of the fixed bearing (303); and the separation auger (305) is fixedly connected to the outside of the rotating shaft (304); The filter press device comprises a filter press unit and a material pushing unit; The filter press unit comprises a hydraulic cylinder (401), a compression plate (402), a filter plate (403), and a connecting pipe (404); the hydraulic cylinder (401) is installed at the top center of the filter press box (2), and its bottom extends into the interior of the filter press box (2); the compression plate (402) is fixedly connected to the bottom of the hydraulic cylinder (401) and slidably connected to the inner wall of the filter press box (2); the filter plate (403) is fixedly connected to the lower part of the interior of the filter press box (2), and its upper surface is also uniformly penetrated with water filter holes; the connecting pipe (404) is fixedly connected to the bottom center of the filter press box (2), and its bottom extends into the interior of the separation tank (301).

2. The reclaimed water circulation device for cement production according to claim 1, characterized in that: The outer surface of the separation auger (305) is evenly penetrated with water filtering holes, and the separation tank (301) is a conical structure.

3. The reclaimed water circulation device for cement production according to claim 1, characterized in that: A drainage pipe (306) is fixedly connected to the left side of the bottom of the separation tank (301), and a mud discharge pipe (307) is fixedly connected to the right side of the bottom of the separation tank (301).

4. The reclaimed water circulation device for cement production according to claim 1, characterized in that: The pushing unit comprises a pushing cylinder (405), a pushing plate (406), and a sealed box door (407); the pushing cylinder (405) is installed on the front of the filter press box (2), and its rear end extends into the interior of the filter press box (2); the pushing plate (406) is fixedly connected to the rear end of the pushing cylinder (405); and the sealed box door (407) is hinged to the back of the filter press box (2).

5. The reclaimed water circulation device for cement production according to claim 1, characterized in that: A partition plate (501) is fixedly connected to the inner center of the water reservoir (1), a stepped filter plate (502) is installed on the inner left side of the water reservoir (1), and the upper surfaces of the two steps on the right side are also penetrated with water filtering holes, an overflow hole (503) is penetrated in the inner center of the partition plate (501), a water pumping pipe (504) is fixedly connected to the middle and lower part of the right side of the back of the water reservoir (1), and observation windows (505) are respectively installed on the left and right sides of the front of the water reservoir (1).

6. A reclaimed water circulation device for cement production according to claim 5, characterized in that: The diameters of the water filtering holes opened on the surfaces of the filter plate (403), the separation auger (305) and the stepped filter plate (502) are gradually reduced, and filter nets (506) are respectively installed inside the overflow hole (503) and the water suction pipe (504).

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