Light alkali precipitation device and recovery equipment

Abstract

The utility model relates to a light alkali precipitation device and recovery equipment, and solves the technical problem that the existing precipitation device is unreasonable in design. The light alkali precipitation device comprises a containing cavity, the middle of the containing cavity is provided with horizontally-arranged filtering filler, and the bottom of the containing cavity is provided with a precipitation tank; the at least two water distribution pipes are arranged above the filtering filler in parallel, and light alkali outlets are formed in the water distribution pipes at intervals; the flow guide plate is arranged between the water distribution pipe and the filtering filler, a flow guide gap is formed between the flow guide plate and the inner wall of the containing cavity, and water outlet weir openings are formed in the upper end of the flow guide plate at intervals. According to the light alkali precipitation device, the flow buffer is arranged between the water distribution pipe and the filtering filler, the situation that the filtering layering efficiency of a front mixture is affected by supplementing of a rear light alkali mixture is avoided, the light alkali mixture passes through the flow guide gap along the inner wall of the containing cavity through the flow guide plate, water inflow of the light alkali mixture is more gentle, and the sputtering problem is avoided; and the filtering and layering efficiency of the light alkali mixture is further improved.

Description

Technical Field

[0001] The utility model belongs to the field of dilute alkali recovery and relates to a dilute alkali precipitation device and recovery equipment. Background Art

[0002] For example, a Chinese patent document discloses a mercerized alkali recovery, precipitation and impurity removal device [202320091761.7], which includes a bottom plate, a plurality of legs are fixedly installed on the top of the bottom plate, a alkali filter pool is fixedly installed on the top of the plurality of legs, six sedimentation tanks are opened inside the alkali filter pool, and the alkali filter pool is located at the bottom of each of the six sedimentation tanks, and a debris sedimentation tank is fixedly installed.

[0003] The defects of the above technical solution are: there is a lack of diversion when the dilute alkali enters the sedimentation and filtration tank. After the dilute alkali is directly added into the sedimentation tank, the original solid-liquid separation state becomes turbid again, the sedimentation in the sedimentation tank is unevenly distributed and the sedimentation efficiency is reduced. Utility Model Content

[0004] The purpose of the utility model is to provide a weak alkali precipitation device and recovery equipment in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The light alkali precipitation device comprises:

[0007] The cavity has a horizontally arranged filter filler in the middle, and a sedimentation tank is arranged at the bottom of the cavity;

[0008] There are at least two water distribution pipes which are arranged in parallel above the filter filler, and the water distribution pipes are provided with dilute alkali outlets at intervals;

[0009] The guide plate is arranged between the water distribution pipe and the filter filler, the guide plate and the inner wall of the cavity are provided with a guide gap, and the upper end of the guide plate is provided with a water outlet weir arranged at intervals.

[0010] Furthermore, there are three sedimentation tanks which are arranged at intervals below the filter filler.

[0011] Furthermore, the sedimentation tank is funnel-shaped and its inner diameter gradually decreases vertically downward.

[0012] Furthermore, a communicating mud discharge pipe and a mud discharge valve arranged on the mud discharge pipe are provided at the bottom of the sedimentation tank.

[0013] Furthermore, a water distribution box connected to the water distribution pipes is provided at an upper end of one side of the cavity.

[0014] Furthermore, the cavity between the guide plate and the filter filler is connected with a dilute alkali discharge pipe.

[0015] Furthermore, the filter filler includes any one of an inclined plate filler or an inclined tube filler.

[0016] Furthermore, the height of the water outlet weir decreases from the middle to both sides.

[0017] The utility model also provides a recovery device, which has the above-mentioned weak alkali precipitation device.

[0018] Compared with the prior art, the dilute alkali precipitation device is provided with a guide plate as a flow buffer between the water distribution pipe and the filter filler to prevent the supplement of the post-placed dilute alkali mixture from affecting the filtering and stratification efficiency of the pre-placed mixture. The dilute alkali mixture is passed through the guide gap along the inner wall of the cavity through the guide plate, so that the water inlet of the dilute alkali mixture is more gentle and no splashing problem occurs. The upper end of the guide plate is provided with a water outlet weir arranged at intervals. The water outlet weir controls the flow direction and uniform flow of the dilute alkali mixture of the guide plate, further improves the filtering and stratification efficiency of the dilute alkali mixture, and greatly improves the concentration and purity of the alkali, while solving the blockage problem of the alkali recovery evaporation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model provides a schematic diagram of a dilute alkali precipitation device.

[0020] Figure 2 for Figure 1 A schematic top view of the alkali precipitation device.

[0021] Figure 3 for Figure 1 Schematic diagram of the guide plate of the dilute alkali precipitation device.

[0022] In the figure, 10, container cavity; 11, alkali discharge pipe; 20, filter filler; 30, sedimentation tank; 31, sludge discharge pipe; 32, sludge discharge valve; 40, water distribution tank; 41, water distribution pipe; 42, alkali outlet; 50, guide plate; 51, guide gap; 52, outlet weir. DETAILED DESCRIPTION

[0023] Embodiment 1

[0024] See also Figures 1 to 3 , which is a schematic diagram of a alkali precipitation device provided by the utility model. The alkali precipitation device comprises: a chamber 10, a filter filler 20 vertically spaced in the chamber 10, a water distribution pipe 41, a guide plate 50, etc. It can be imagined that the alkali precipitation device also includes other functional components and specific structures, such as electrical connection components, mounting structures, etc., which are all well-known technologies to those skilled in the art, so they will not be described in detail one by one here.

[0025] The cavity 10 is a box cavity or a sedimentation tank 30 cavity dug on the ground. In the present embodiment, the cavity 10 is a box supported by a thin sheet of stainless steel material, and an opening may be provided at the upper end to provide the cavity 10 with visibility.

[0026] A horizontally arranged filter filler 20 is provided in the middle of the cavity 10, and the filter filler 20 includes any one of an inclined plate filler or an inclined tube filler. In this embodiment, the filter filler 20 is an inclined plate filler, and the filter filler 20 vertically divides the cavity 10 into two spaces, the solution layer is above the filter filler 20, and the sedimentation tank 30 is below the filter filler 20.

[0027] When the alkaline solution passes through the filter packing 20, the solid matter settles downward into the filter packing 20, and the clear solution moves upward to be located above the filter packing 20. The precipitate gathers in the filter packing 20. When the carrying capacity is exceeded, the precipitate falls into the sedimentation tank 30 below and is collected.

[0028] A water distribution tank 40 is provided at the upper end of one side of the cavity 10. The water distribution tank 40 is connected to the front desalinated water inlet pipe. The water distribution tank 40 serves as a water inlet transfer station for the desalinated water precipitation device. The water distribution tank 40 is connected in parallel to at least three water distribution pipes 41 located above the filter filler 20. Desalinated water outlets 42 are provided on the water distribution pipes 41 at intervals. The desalinated water is collected by the water distribution tank 40 and then dispersedly transported through the water distribution pipes 41, thereby ensuring that the flow of the water distribution pipe 41 is stable and evenly dispersed and flows out through the desalinated water outlets 42.

[0029] A guide plate 50 is provided between the water distribution pipe 41 and the filter filler 20. The guide plate 50 is positioned and installed by the inner wall bracket of the cavity 10. The light alkali mixture flowing out of the light alkali outlet 42 of the water distribution pipe 41 is guided by the guide plate 50 and then flows into the upper end space of the filter filler 20. The guide plate 50 serves as a flow buffer between the water distribution pipe 41 and the filter filler 20 to prevent the supplement of the rear light alkali mixture from affecting the filtering and stratification efficiency of the front mixture. The cavity 10 between the guide plate 50 and the filter filler 20 is connected to the light alkali discharge pipe 11. After stratification, the light alkali discharge pipe 11 is opened to transport the filtered light alkali to the light alkali recovery equipment for secondary filtration and evaporation recovery, which greatly improves the concentration and purity of the alkali and solves the clogging problem of the alkali recovery evaporation device.

[0030] More optimally, the guide plate 50 and the inner wall of the cavity 10 are provided with a guide gap 51, and the dilute alkali mixture is passed through the guide gap 51 along the inner wall of the cavity 10 through the guide plate 50, so that the dilute alkali mixture enters the water more smoothly and does not cause the splashing problem. The upper end of the guide plate 50 is provided with a water outlet weir 52 arranged at intervals, and the water outlet weir 52 controls the flow direction and uniform flow of the dilute alkali mixture of the guide plate 50, further improving the filtering and stratification efficiency of the dilute alkali mixture. The height of the water outlet weir 52 decreases from the middle to both sides to control the flow rate of the dilute alkali mixture on the guide plate 50.

[0031] In this embodiment, there are three sedimentation tanks 30 and they are arranged at intervals below the filter filler 20. The sedimentation tanks 30 are funnel-shaped and the inner diameter gradually decreases vertically downward. The funnel-shaped structure makes it easier for sediment to gather and discharge.

[0032] A connected mud discharge pipe 31 and a mud discharge valve 32 are provided at the bottom of the sedimentation tank 30. The mud discharge valve 32 controls the switch of the mud discharge pipe 31. When the sedimentation tank 30 reaches the upper limit or the filtration is completed, it opens and transports the sediment to the sewage treatment center for treatment through the mud discharge pipe 31.

[0033] Embodiment 2

[0034] The utility model also provides a recovery device, which has the above-mentioned weak alkali precipitation device. Except for the weak alkali precipitation device, other components are existing technologies or commercially available parts.

[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A weak alkali precipitation device, characterized in that: The light alkali precipitation device comprises: The cavity has a horizontally arranged filter filler in the middle, and a sedimentation tank is arranged at the bottom of the cavity; There are at least two water distribution pipes which are arranged in parallel above the filter filler, and the water distribution pipes are provided with dilute alkali outlets at intervals; The guide plate is arranged between the water distribution pipe and the filter filler, the guide plate and the inner wall of the cavity are provided with a guide gap, and the upper end of the guide plate is provided with a water outlet weir arranged at intervals.

2. The alkali precipitation device according to claim 1, characterized in that: The number of the sedimentation tanks is three and the sedimentation tanks are arranged below the filter filler at intervals.

3. The alkali precipitation device according to claim 2, characterized in that: The sedimentation tank is funnel-shaped and its inner diameter gradually decreases vertically downward.

4. The alkali precipitation device according to claim 3 is characterized in that: A communicating mud discharge pipe and a mud discharge valve arranged on the mud discharge pipe are provided at the bottom of the sedimentation tank.

5. The alkali precipitation device according to claim 1, characterized in that: A water distribution box connected to the water distribution pipes is provided at the upper end of one side of the cavity.

6. The alkali precipitation device according to claim 1, characterized in that: The cavity between the guide plate and the filter filler is connected with a dilute alkali discharge pipe.

7. The alkali precipitation device according to claim 1, characterized in that: The filter filler includes any one of an inclined plate filler or an inclined tube filler.

8. The alkali precipitation device according to claim 1, characterized in that: The height of the water outlet weir decreases from the middle to both sides.

9. A recycling device, characterized in that: A light alkali precipitation device is provided according to any one of claims 1 to 8.

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