Kiln gas washing water solid-liquid separation clarification device

Abstract

The utility model discloses a kiln gas washing water solid-liquid separation clarification device, which relates to the field of clarification devices and comprises a clarification barrel, an inner sleeve is arranged on the clarification barrel, a diversion trench is arranged on one side of the inner sleeve and communicated with the inner sleeve, an overflow weir is arranged on the inner wall of the clarification barrel, and the top of the overflow weir is lower than a barrel opening of the clarification barrel. A liquid outlet channel is arranged between the overflow weir and the clarifying barrel and is communicated with a liquid outlet hole, and the liquid outlet hole penetrates through the side wall of the clarifying barrel; the solid-liquid separation and clarification device for the kiln gas washing water can effectively realize solid-liquid separation of the kiln gas washing water, improve the wastewater treatment efficiency, reduce the occupied area, reduce the silt cleaning workload, ensure the production continuity, realize cyclic utilization of water resources, reduce the production cost and improve the environmental protection benefit.

Description

Technical Field

[0001] The utility model relates to the field of clarification devices, and particularly to a solid-liquid separation and clarification device for kiln gas washing water. Background Art

[0002] Kiln gas washing water is a complex wastewater generated during the washing, cooling and dust removal of kiln gas in industrial processes, especially in high-temperature and high-dust environments such as lime kilns. This wastewater not only has a large volume, but also contains a large amount of harmful substances such as suspended solids, phenol cyanide, sulfides, inorganic salts and zinc metal ions, posing a serious threat to the environment and human health.

[0003] Currently, one of the treatment methods for kiln gas washing water is to transport the wastewater to a clarification barrel for solid-liquid separation and clarification. However, in this treatment method, sludge is easily deposited at the bottom of the clarification barrel, and the water inflow of the static clarification pond cannot be too large, otherwise it will scour the bottom sediment, causing the sediment to rise and flow out with the clarified liquid, thus affecting the water quality. At the same time, in order to treat all the water volume, multiple groups of clarification overflow ponds need to be built, which not only requires a large site area, but also increases the workload of sediment cleaning. Content of the Utility Model

[0004] The purpose of the utility model is to provide a solid-liquid separation and clarification device for kiln gas washing water, which can effectively realize the solid-liquid separation of kiln gas washing water, improve the wastewater treatment efficiency, reduce the floor area, reduce the workload of sediment cleaning, ensure the continuity of production, realize the recycling of water resources, reduce the production cost and improve the environmental protection benefit.

[0005] The above optimized structure of the utility model is achieved through the following technical solutions: A solid-liquid separation and clarification device for kiln gas washing water, including a clarification barrel, an inner sleeve is provided on the clarification barrel, a diversion groove is provided on one side of the inner sleeve, the diversion groove is communicated with the inner sleeve, an overflow weir is provided on the inner wall of the clarification barrel, the top of the overflow weir is lower than the barrel mouth of the clarification barrel, an outlet channel is provided between the overflow weir and the clarification barrel, the outlet channel is communicated with an outlet hole, and the outlet hole penetrates through the side wall of the clarification barrel.

[0006] In some embodiments, the clarification barrel includes a barrel bottom, a sewage outlet is coaxially provided on the barrel bottom, and the sewage outlet is connected with a control valve.

[0007] In some embodiments, the barrel bottom is a conical bottom.

[0008] In some embodiments, it further includes a stirring device, the stirring device includes a stirring motor, the stirring motor is fixedly arranged on the top of the inner sleeve, a stirring shaft is provided on the output shaft of the stirring motor, the stirring shaft coaxially penetrates through the inner sleeve, and a sludge scraping rake is provided at the bottom of the stirring shaft.

[0009] In some embodiments, the distance between the sludge scraping rake and the bottom surface of the barrel gradually increases from top to bottom.

[0010] In some embodiments, a plurality of speed reduction plates are provided between the inner sleeve and the stirring shaft, and the plurality of speed reduction plates are fixedly arranged on the inner wall of the inner sleeve at equal intervals.

[0011] In some embodiments, the speed reduction plates are horizontally arranged, and the speed reduction plates are provided with a plurality of liquid flow holes therethrough.

[0012] In some embodiments, the inner sleeve is coaxially arranged with the sewage outlet.

[0013] In summary, the present utility model has the following beneficial effects:

[0014] In this kind of kiln gas washing water solid-liquid separation and clarification device, the inlet of the static clarification tank is arranged in the clarified liquid through the inner sleeve, which prolongs the path of the kiln gas washing water overflowing from the clarification barrel to the overflow weir, so that the solid-liquid separation is completed when the kiln gas washing water reaches the overflow weir, avoiding the impurities entrained during the overflow of the kiln gas washing water, thereby affecting the quality of the clarified water; a stirring device is arranged in the clarification barrel to make the kiln gas washing water in the clarification barrel rotate and form a vortex. Under the rotation of the vortex, rapid solid-liquid separation is realized, and the treatment capacity of the kiln gas washing water can be improved without affecting production, thereby reducing the demand for the number of clarification overflow tanks and requiring a small site area; the opening and closing of the sewage outlet can be controlled by the control valve at the bottom of the sewage outlet to realize the rapid discharge of sludge and reduce the workload of sludge cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] In the figure: 1, clarification barrel; 11, sewage outlet; 12, barrel bottom; 2, inner sleeve; 3, diversion groove; 4, overflow weir; 5, stirring device; 51, stirring motor; 52, stirring shaft; 53, sludge scraping rake; 6, liquid outlet channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Reference Figure 1, A solid-liquid separation and clarification device for kiln gas washing water, comprising a clarification barrel 1. An inner sleeve 2 is provided on the clarification barrel 1. A diversion groove 3 is provided on one side of the inner sleeve 2. The diversion groove is communicated with the inner sleeve 2 and is used to convey kiln gas washing water into the clarification barrel 1. An overflow weir 4 is provided on the inner wall of the clarification barrel 1. The overflow weir 4 can be a fixed ring fixed on the inner wall of the clarification barrel 1, and the cross-section of the fixed ring can be L-shaped. An outlet channel 6 can be provided between the overflow weir 4 and the clarification barrel 1. The top of the overflow weir 4 is lower than the barrel mouth of the clarification barrel 1. The outlet channel 6 is communicated with an outlet hole 41, and the outlet hole 41 penetrates through the side wall of the clarification barrel 1. The inner sleeve 2 increases the distance of the kiln gas washing water flowing towards the overflow weir 4, so that when the kiln gas washing water flows to the overflow weir 4, solid-liquid separation is completed, thus avoiding the overflow of clarified kiln gas washing water carrying impurities and affecting the water quality. When the liquid level height in the clarification barrel 1 is higher than the overflow weir 4, the kiln gas washing water will flow from the clarification barrel 1 into the outlet channel 6 and flow out through the outlet hole 41, thus realizing the recycling of the kiln gas washing water.

[0019] In some embodiments, the clarification barrel 1 includes a barrel bottom 12. The barrel bottom 12 can be a conical bottom, so that the sludge moves downward under the action of gravity on the barrel bottom 12, facilitating the discharge of the sludge. A sewage outlet 11 is coaxially provided on the barrel bottom 12. The inner sleeve 2 is coaxially arranged with the sewage outlet 11. The sewage outlet 11 is connected with a control valve, and the opening and closing of the sewage outlet 11 can be controlled through the control valve, so as to realize the control of the sludge discharge in the clarification barrel 1.

[0020] In some embodiments, a stirring device 5 is further included. The stirring device 5 includes a stirring motor 51. The stirring motor 51 is fixedly arranged on the top of the inner sleeve 2. A stirring shaft 52 is provided on the output shaft of the stirring motor 51. The stirring shaft 52 coaxially penetrates through the inner sleeve 2. A sludge scraping rake 53 is provided at the bottom of the stirring shaft 52. The sludge scraping rake 53 can be a scraper with a bottom shape adapted to the shape of the barrel bottom 12. The sludge scraping rake 53 can scrape off the sludge accumulated on the surface of the barrel bottom 12, improving the completion degree of sludge removal; at the same time, the stirring motor 51 rotates, driving the sludge scraping rake 53 to rotate through the stirring shaft 52, so that the kiln gas washing water in the clarification barrel 1 rotates accordingly, forming a vortex in the clarification barrel 1. Under the action of centripetal force, the solid-liquid separation of the kiln gas washing water is accelerated, and a solid layer and a liquid layer are formed inside the clarification barrel 1. The solid layer isolates the liquid layer from the sewage outlet 11. When the sewage outlet 11 is opened to clean the sludge, the liquid layer will not flow out from the sewage outlet 11. The kiln gas washing water can be continuously conveyed into the clarification barrel 1, realizing the continuity of production, and further realizing the recycling of water resources, reducing production costs and improving environmental protection benefits.

[0021] In some embodiments, the distance between the sludge scraping rake 53 and the surface of the barrel bottom 12 can gradually increase from top to bottom, which can reduce the accumulation of sludge at the place on the barrel bottom 12 far from the sewage outlet 11.

[0022] In some embodiments, a plurality of deceleration plates are provided between the inner sleeve 2 and the stirring shaft 52. The plurality of deceleration plates are fixedly provided on the inner wall of the inner sleeve 2 at equal intervals, which can reduce the speed at which the kiln gas washing water impacts the clarification barrel 1, thereby avoiding the sludge in the clarification barrel 1 from being overflowed due to the impact. The deceleration plate can be arranged horizontally, and a plurality of liquid flow holes are provided through the deceleration plate to avoid the accumulation of the kiln gas washing water on the deceleration plate.

[0023] The specific working principle is as follows:

[0024] The kiln gas washing water enters the inner sleeve 2 through the guide groove 3, and flows into the clarification barrel 1 under the action of gravity, mixes with the kiln gas washing water in the clarification barrel 1, and flows toward the overflow weir 4. During the flow, solid-liquid separation is achieved under the action of gravity, the kiln gas washing water in the clarification barrel 1 increases continuously, and the liquid level rises continuously. When the liquid level is higher than the overflow weir 4, the clarified kiln gas washing water flows into the liquid outlet channel 6 and is recycled through the liquid outlet hole 41, thereby realizing the treatment of the kiln gas washing water.

[0025] During the treatment process, the stirring device 5 can be operated, and the stirring motor 51 drives the scraper rake 53 to rotate, so that the kiln gas washing water in the clarification barrel 1 is stratified, and the sewage outlet 11 is opened, and the solid layer (i.e., sludge) at the bottom is discharged from the sewage outlet 11 to the sewage pool, and then sent to the mixing barrel through the mud pump, and transported to the brine injection well together with the alkali waste liquid, to achieve pollution-free discharge.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A solid-liquid separation and clarification device for kiln gas washing water, comprising a clarification barrel (1), characterized in that: An inner sleeve (2) is provided on the clarification tank (1). A diversion groove (3) is provided on one side of the inner sleeve (2). The diversion groove communicates with the inner sleeve (2). An overflow weir (4) is provided on the inner wall of the clarification tank (1). The top of the overflow weir (4) is lower than the mouth of the clarification tank (1). A liquid outlet channel (6) is provided between the overflow weir (4) and the clarification tank (1). The liquid outlet channel (6) communicates with a liquid outlet hole (41). The liquid outlet hole (41) penetrates through the side wall of the clarification tank (1).

2. The solid-liquid separation and clarification device for kiln gas washing water according to claim 1, wherein: The clarification tank (1) includes a tank bottom (12). A sewage discharge port (11) is coaxially provided on the tank bottom (12). The sewage discharge port (11) is connected with a control valve.

3. A solid-liquid separation and clarification device for kiln gas washing water according to claim 2, characterized in that: The tank bottom (12) is a conical bottom.

4. A solid-liquid separation and clarification device for kiln gas washing water according to claim 2, characterized in that: It further includes a stirring device (5). The stirring device (5) includes a stirring motor (51). The stirring motor (51) is fixedly arranged on the top of the inner sleeve (2). A stirring shaft (52) is provided on the output shaft of the stirring motor (51). The stirring shaft (52) coaxially penetrates through the inner sleeve (2). A sludge scraping rake (53) is provided at the bottom of the stirring shaft (52).

5. A kiln gas washing water solid-liquid separation and clarification device according to claim 4, characterized in that: The distance between the sludge scraping rake (53) and the surface of the tank bottom (12) gradually increases from top to bottom.

6. The solid-liquid separation and clarification device for kiln gas washing water according to claim 4, characterized in that: A plurality of speed reduction plates are provided between the inner sleeve (2) and the stirring shaft (52). The plurality of speed reduction plates are fixedly arranged on the inner wall of the inner sleeve (2) at equal intervals.

7. A solid-liquid separation and clarification device for kiln gas washing water according to claim 6, characterized in that: The speed reduction plates are horizontally arranged. The speed reduction plates are provided with a plurality of liquid flow holes.

8. A solid-liquid separation and clarification device for kiln gas washing water according to claim 4, characterized in that: The inner sleeve (2) and the sewage discharge port (11) are coaxially arranged.

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