Self-cleaning, defoaming inclined plate sedimentation device and treatment process

Abstract

The application discloses a self-dust cleaning and defoaming inclined plate sedimentation device, which comprises a defoaming assembly, an inclined plate dust flushing assembly and a main water supply pipe, the main water supply pipe is an annular pipeline, is arranged on the inner circumferential side of the upper edge of a thickening pool body, a plurality of first branch pipes are arranged on the upper side of the main water supply pipe at intervals, the first branch pipes are connected with a defoaming branch pipe and a dust flushing branch pipe through three-way joints respectively, the defoaming assembly comprises an annular baffle and a defoaming nozzle, the defoaming nozzle is connected with the defoaming branch pipe, the inclined plate dust flushing assembly is composed of a plurality of trapezoidal structure inclined plate dust flushing units, the upper end of the inclined plate dust flushing unit is arranged inwardly and the lower end is arranged outwardly, and the inclined plate dust flushing assembly is arranged in the coal slurry thickening pool in a conical frustum structure, the device can automatically flush the dirt deposited in the coal slurry thickening pool, can eliminate the surface bubbles, greatly improves the sludge cleaning speed, reduces the cleaning operation difficulty, adopts a periodic self-cleaning mode, and avoids the danger caused by manual cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of coal slurry water treatment, in particular to a self-cleaning and defoaming inclined plate sedimentation device and a treatment process. Background Art

[0002] As a core structure in the metallurgical and flotation industries, the coal slime thickening tank is a key technical device for achieving coal slime water recycling. It primarily consists of a thickening tank and a rake-type scraper for sludge thickening. Its operating principle is to pump tailwater generated during industrial production into the thickening tank using a pump, where it is purified by the addition of a coagulant. The resulting clean water flows back to the clear water tank through a sump at the top of the thickening tank. The generated coal slime is collected by the rake-type scraper in the central sludge collection area at the bottom of the thickening tank, where it is then pumped to a pressure filter by a sludge pump.

[0003] Currently, the operation of coal slime thickeners suffers from the following drawbacks: 1. Due to the coal preparation process, a certain dosage of flotation agent is required, resulting in numerous bubbles of varying sizes in the tailwater. These bubbles contain tiny solid particles on their surfaces, causing a large number of bubbles to float on the surface and flow through the weirs of the sump into the clear water tank, thus affecting water recycling. 2. Because the incoming water is piped directly to the central area of ​​the thickener, this causes the water to short-circuit during settling, significantly shortening the settling time and failing to achieve the desired settling effect, thus affecting water quality.

[0004] In this situation, the quality of water directly affects the quality of clean coal and middling coal, and also affects the filtration of coal slime. How to find a device that can solve this problem has become a must-face issue. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-cleaning, defoaming inclined plate sedimentation device and treatment process, which can maintain the stability of the tail water treatment effect by defoaming and increasing the reaction and sedimentation time, laying the foundation for the subsequent recycling of water; through a certain control program, the coal slime on the device is periodically automatically cleaned, and the bubbles inside the annular barrier plate are cyclically sprayed to achieve continuity and stability of safe production.

[0006] The technical solution adopted in the present invention is:

[0007] The self-cleaning and defoaming inclined plate sedimentation device comprises a defoaming assembly, an inclined plate ash flushing assembly and a main water supply pipe, the main water supply pipe is an annular pipeline and is arranged on the inner side of the upper edge of the thickening pool body, a plurality of first branch pipes are arranged on the upper side of the main water supply pipe at intervals, and the first branch pipes are respectively connected with a defoaming branch pipe and an ash flushing branch pipe through a three-way joint; the defoaming assembly comprises an annular baffle and a defoaming nozzle, the annular baffle is arranged on the inner side of the upper edge of the water collecting tank of the thickening pool body, and the defoaming nozzle is connected with the defoaming branch pipe; the inclined plate ash flushing assembly is composed of a plurality of trapezoidal inclined plate ash flushing units, the upper end of the inclined plate ash flushing unit is arranged inwardly and the lower end is arranged outwardly, and the inclined plate ash flushing assembly is arranged in the coal slurry thickening pool in a conical frustum structure.

[0008] The inclined plate ash flushing unit comprises a trapezoidal bottom groove with an open upper end and a sedimentation inclined plate, the sedimentation inclined plate is sequentially stacked from top to bottom by a plurality of trapezoidal sealing plates, the areas of the plurality of trapezoidal sealing plates gradually increase from small to large to form an integral cover plate, and a cavity formed between the sedimentation inclined plate and the trapezoidal bottom groove becomes a water storage cavity; meanwhile, the lower edge of an upper sealing plate is stacked above the upper edge of a lower sealing plate with a gap, and the gap between the upper and lower sealing plates forms a jetting port; and the water storage cavity is connected with a water inlet pipe for connecting the ash flushing branch pipe.

[0009] The sedimentation inclined plate adopts an integral cover plate, a plurality of parallel strip-shaped jetting ports are formed in the cover plate from top to bottom, and the jetting direction of the jetting ports is downward along the upper surface of the sedimentation inclined plate.

[0010] The lower edge of the jetting port is recessed into the groove cavity along the sedimentation inclined plate to form a smooth jetting port.

[0011] The defoaming nozzle adopts a cylindrical nozzle, which comprises a nozzle body in a cylindrical structure, the nozzle body is horizontally arranged, the nozzle body is connected with the defoaming branch pipe, a plurality of rows of water jet holes are horizontally arranged on the front end of the nozzle body, the corresponding angle range of the cylindrical surface where the plurality of rows of water jet holes are located is 0<β<90°, and the central axis of each water jet hole is perpendicular to the axis of the cylindrical body.

[0012] A processing technology based on the self-cleaning and defoaming inclined plate sedimentation device, comprising the following steps:

[0013] A: defoaming stage

[0014] A large amount of dust-containing bubbles floating on the surface of the reaction pool body are defoamed by spraying high-pressure water in the form of mist or water curtain through the defoaming nozzle;

[0015] B: sedimentation and ash flushing stage

[0016] The wastewater mixture inside the reaction pool body is firstly reacted to form suspensions, and after coagulation, firstly falls on the sedimentation inclined plate; then through intermittent opening of the main supply pipe, the high-pressure water is sprayed along the direction of the sedimentation inclined plate by the ash flushing branch pipe, the suspensions accumulated on the sedimentation inclined plate are rapidly impacted downward, so that the suspensions can rapidly flow to the lower part of the sedimentation tank, thereby accelerating the falling speed of the suspensions.

[0017] The device is annularly installed in the surrounding of the water collecting tank near the coal slurry concentration tank, when the coal slurry water after flocculation reaction passes through the device, the bubbles floating on the upper part of the coal slurry water are blocked inside the annular blocking plate, and then are removed by the operation of the defoaming assembly, so that the water quality is stabilized; at the same time, the coal slurry water containing suspensions is blocked by the annular blocking plate and cannot directly horizontally enter the water collecting tank, but slowly rises into the water collecting tank after passing through the lower end of the device, so that the sedimentation time is increased, and the treatment effect is further ensured; due to the special structure and installation mode of the device, the pool wall of the concentration tank is surrounded, so that the space is large at the upper part and small at the lower part, the rising flow rate of the coal slurry water is changed from fast to slow, so that the sedimentation of the suspensions is more beneficial; in addition, the coal slurry on the sedimentation inclined plate is periodically automatically cleaned, and the bubbles blocked by the annular bubble collecting pipe are cyclically sprayed, so that the continuity and stability of safe production are realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the front view of the present application;

[0019] Figure 2 is the top view of the present application;

[0020] Figure 3 is the installation structure schematic view of the present application;

[0021] Figure 4 is the enlarged view of A in the present application Figure 3

[0022] Figure 5 is the defoaming nozzle sectional view of the present application;

[0023] Figure 6 is the inclined plate ash flushing unit perspective view of the present application;

[0024] Figure 7 is the side view of the trapezoidal sealing plate in the inclined plate ash flushing unit of the present application;

[0025] Figure 8 is the side view of the cover plate in the inclined plate ash flushing unit of the present application. DETAILED DESCRIPTION

[0026] As Figure 1 and Figure 2 ​As shown, the present application is mainly used in the coal slime thickening tank 1 to accelerate the discharge speed of the suspended matter and eliminate the bubble on the surface of the thickening tank 1 to avoid secondary pollution. The present application comprises a defoaming assembly, an inclined plate ash flushing assembly and a main water supply pipe 2, the main water supply pipe 2 is an annular pipe arranged on the inner side of the upper edge of the thickening tank 1, the main water supply pipe 2 is connected with a clean water source, and an annular water inlet distribution pipe is adopted to facilitate the connection of the high-pressure water source, so that an independent distributor is not needed, and the cost of additional accessories is increased. A plurality of first branch pipes 3 are uniformly and spacedly arranged on the upper side of the main water supply pipe 2, the first branch pipes 3 are used to uniformly distribute the clean water, and the first branch pipes 3 are respectively connected with a defoaming branch pipe 4 and an ash flushing branch pipe 5 through a three-way joint. An electromagnetic valve is arranged on the first branch pipe 3 to automatically control the opening of the pipe and periodically defoam and flush.

[0027] As shown in Figure 3 and Figure 4 , the defoaming assembly comprises an annular baffle 6 and a defoaming nozzle 7, the annular baffle 6 is arranged on the inner side of the upper edge of the water collecting tank of the thickening tank 1 and is used to block the bubble from flowing into the water collecting tank along the water flow and further flowing into the next tank to cause secondary pollution, and the defoaming nozzle 7 is connected with the defoaming branch pipe 4. The defoaming nozzle 7 of the present application adopts a cylindrical nozzle, and the spraying area of the cylindrical nozzle in the same volume of geometric body is larger. Since the present device is mainly aimed at the bubble gathered together in a large area, a large area of spraying is needed to achieve rapid and accurate defoaming. As shown in Figure 5 , the cylindrical nozzle comprises a nozzle body 71 of a cylindrical structure, the nozzle body 71 is horizontally arranged, the nozzle body 71 is connected with the defoaming branch pipe 4, and a plurality of rows of water spraying holes 72 are horizontally arranged on the front end of the nozzle body 71, the corresponding angle range of the cylindrical surface where the plurality of rows of water spraying holes 72 are arranged is 0 < β < 90°, and the central axis of each water spraying hole 72 is perpendicular to the axis of the cylindrical body. Such a design is based on the principle of fluid mechanics, because the fluid can achieve greater impact force when sprayed at 45°, so that the bubble can be better broken.

[0028] The inclined plate ash flushing assembly of the present application is composed of a plurality of trapezoidal structure inclined plate ash flushing units 8, as shown in Figure 6 , the upper end of the inclined plate ash flushing unit 8 is arranged inwardly and the lower end is arranged outwardly, and the inclined plate ash flushing assembly is arranged in a conical frustum structure inside the coal slime thickening tank 1.

[0029] The inclined plate ash flushing unit 8 of the present device comprises a trapezoidal bottom groove 81 with an open upper end and a sediment inclined plate 82, and the sediment inclined plate 82 adopts two structures, as shown in Figure 6 and Figure 7As shown in the drawings, one is that: the sedimentation inclined plate 82 is sequentially stacked from top to bottom by multiple trapezoidal sealing plates 83, the areas of the multiple trapezoidal sealing plates 83 gradually increase, the whole sealing plate is formed, and the cavity formed between the sedimentation inclined plate 82 and the trapezoidal bottom groove 81 becomes a water storage cavity; meanwhile, the lower edge of the upper sealing plate is stacked above the upper edge of the lower sealing plate, the overlapping part is preferably about 1 cm, and a gap is arranged, the gap is preferably about 1 mm, and the gap between the upper and lower sealing plates forms a jet port 84; the water storage cavity is connected with a water inlet pipe 85, and the water inlet pipe 85 is used to connect the ash flushing branch pipe 5.

[0030] As shown in the drawings, Figure 6 and Figure 8 As shown in the drawings, the other is that: the sedimentation inclined plate 82 is provided with a whole cover plate, and multiple parallel strip-shaped blow-off ports 86 are formed in the cover plate from top to bottom, and the blow-off direction of the blow-off ports 86 is downward along the upper surface of the sedimentation inclined plate 82. The lower edge of the blow-off port 86 is recessed into the cavity along the sedimentation inclined plate 82, and a smooth jet port is formed.

[0031] As shown in the drawings, Figure 3 The device is used in the circular coal slime thickening tank 1, and the purpose is to make the sludge or sediment falling freely in the coal slime thickening tank 1 fall on the sedimentation inclined plate 82, and then the sludge or sediment is washed through the jet port 84, so that the falling speed of the sludge or sediment is accelerated, and the sludge or sediment is discharged as quickly as possible.

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0033] As shown in the drawings, Figure 3 The device is applied to some large coal slime thickening tanks 1 in coal preparation plants or sewage treatment plants, and is formulated according to the size of the coal slime thickening tank 1. The device is not limited to the specification of the coal slime thickening tank 1, and can be used regardless of whether the water is fed from the top or the bottom. The device only needs to be installed in the coal slime thickening tank 1. The principle of the device is to use the inclined structure of the self-cleaning inclined plate to catch the sludge or sediment falling in the coal slime thickening tank 1, and to use high-pressure water to wash and clean the sludge falling on the upper surface of the self-cleaning inclined plate, so as to achieve the effect of accelerating the sludge treatment.

[0034] First, the device is installed around the central pipeline of the coal slime thickening tank 1, and the central pipeline is generally a water inlet pipe 85 or a water outlet pipe.

[0035] Sedimentation and ash flushing stage

[0036] The waste water mixture inside the reaction pool body is firstly reacted to form suspended matter, and after coagulation, firstly falls on the sedimentation inclined plate; then through intermittent opening of the main supply pipe, the dust flushing branch pipe sprays high pressure water along the direction of the sedimentation inclined plate, rapidly impacts the suspended matter accumulated on the sedimentation inclined plate downward, so that the suspended matter can flow rapidly to the lower part of the sedimentation tank, thereby accelerating the falling speed of the suspended matter.

[0037] Specifically, the device is not affected, and the sludge or sediment in the coal slime thickening tank 1 slowly deposits downward over time and gradually falls on the upper surface of the sedimentation inclined plate 82 of the device, and accumulates on the upper surface of the sedimentation inclined plate 82. After accumulating to a certain extent, part of the sludge or sediment will slide down along the sedimentation inclined plate 82 from top to bottom due to gravity, and part of the sludge or sediment that does not slide down will continue to accumulate until the high-pressure water is turned on. The high-pressure water source enters from the main water supply pipe 2, and the water source can be provided by the clean water of the coal slime thickening tank 1 itself or the clean water from outside. After the high-pressure water enters the main water supply pipe 2, it enters the first branch pipe 3 and is redistributed by each first branch pipe 3. One way leads to the dust flushing branch pipe 5, which is connected to the trapezoidal bottom groove 81 and enters the corresponding closed trapezoidal bottom groove 81. The high-pressure water is stored and pressurized in the closed trapezoidal bottom groove 81 and is finally sprayed out of the spray port 84 to clean the accumulated sludge and sediment and accelerate the falling speed of the sludge, thereby achieving the effect of accelerated sludge treatment. The structure of the device is 3-5 times that of the traditional coal slime thickening tank 1, greatly improving the sludge cleaning and treatment speed.

[0038] At the same time, the defoaming stage is carried out

[0039] A large amount of dust-containing bubbles float on the surface of the reaction pool body. The high-pressure water is sprayed out in the form of mist or water curtain through the defoaming nozzle, and the mist or water curtain sprayed out performs defoaming treatment on the surface dust-containing bubbles.

[0040] The other way leads to the defoaming branch pipe 4, which is connected to the defoaming nozzle 7. The defoaming nozzle 7 adopts a cylindrical nozzle, and a plurality of rows of water spraying holes 72 are arranged on the front half of the cylindrical surface of the cylindrical nozzle. The opening angles of the plurality of rows of water spraying holes 72 are different. The best spraying angle is used to improve the spraying intensity as much as possible according to the principle of fluid mechanics, so as to break the bubbles with sufficient force and achieve the purpose of defoaming.

[0041] Finally, it should be noted that the above examples are used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents. The modification or replacement does not change the essence of the corresponding technical solution from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A self-cleaning and defoaming inclined plate sedimentation device, characterized by: It includes a defoaming component, an inclined plate ash flushing component and a main water supply pipe. The main water supply pipe is an annular pipe and is arranged on the inner side of the upper edge of the thickening tank body. A plurality of primary branch pipes are arranged at intervals on the upper side of the main water supply pipe. The primary branch pipes are respectively connected to a defoaming branch pipe and an ash flushing branch pipe through a three-way interface; the defoaming component includes an annular baffle plate and a defoaming nozzle, and the defoaming nozzle is connected to the defoaming branch pipe; the inclined plate ash flushing component is composed of a plurality of trapezoidal inclined plate ash flushing units, the upper end of the inclined plate ash flushing unit is inclined inward and the lower end is inclined outward, and the inclined plate ash flushing component is a frustum-shaped structure and is arranged inside the coal slime thickening tank; The inclined plate ash flushing unit comprises a trapezoidal bottom trough with an open top and a settling inclined plate. The settling inclined plate is formed by stacking a plurality of trapezoidal sealing plates in sequence from top to bottom. The areas of the plurality of trapezoidal sealing plates increase from small to large to form a whole cover plate. The cavity formed between the settling inclined plate and the trapezoidal bottom trough becomes a water storage cavity. At the same time, the lower edge of the upper sealing plate is stacked above the upper edge of the lower sealing plate with a gap. The gap between the upper and lower sealing plates forms a jet port at the joint. The water storage cavity is connected to a water inlet pipe, which is used to connect to the ash flushing branch pipe. The defoaming nozzle adopts a cylindrical nozzle, including a nozzle body of a cylindrical structure, the nozzle body is horizontally arranged, the nozzle body is connected to the defoaming branch pipe, and the front end of the nozzle body is horizontally provided with multiple rows of water spray holes. The angle range corresponding to the cylindrical surface where the multiple rows of water spray holes are located is: 0<β<90°; and the central axis of each water spray hole is perpendicular to the axis of the cylinder; The sedimentation inclined plate may be a whole cover plate, which is provided with a plurality of parallel strip-shaped blowing ports from top to bottom, and the blowing directions of the blowing ports are downward along the upper surface of the sedimentation inclined plate.

2. The self-cleaning and defoaming inclined plate sedimentation device according to claim 1 is characterized in that: The lower side of the blowing port is sunken into the tank cavity along the sedimentation inclined plate to form a smooth blowing port.

3. A treatment process based on the self-cleaning and defoaming inclined plate sedimentation device according to any one of claims 1 to 2, comprising the following steps: A: Defoaming stage A large number of dust bubbles float on the surface of the reaction tank. High-pressure water is sprayed out in the form of droplets or water curtains through the defoaming nozzle. The sprayed droplets or water curtains defoam the dust bubbles on the surface. B: Sedimentation and ash flushing stage The wastewater mixture inside the reaction tank first reacts to form suspended matter, which then falls on the sedimentation inclined plate after condensation; then, through the intermittent opening of the main supply pipe, the ash flushing branch pipe will spray high-pressure water along the direction of the sedimentation inclined plate, quickly impacting the suspended matter accumulated on the sedimentation inclined plate downward, so that the suspended matter can quickly flow to the lower part of the sedimentation tank, thereby accelerating the falling speed of the suspended matter.

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