Secondary sedimentation device for sedimentation tank of dewatering bin system

Abstract

The utility model relates to the technical field of dewatering systems of thermal power plants, and discloses a secondary sedimentation device for a sedimentation tank of a dewatering bin system, which comprises a concentration tank, a scraping mechanism is arranged in the concentration tank, and a sedimentation mechanism is arranged at the bottom of the concentration tank. According to the secondary sedimentation device of the sedimentation tank of the dewatering bin system, the pipeline is additionally arranged from the outside, so that the potential safety hazard of personnel construction is relatively small, the slag slurry at the bottom of the concentration tank can be repeatedly settled and filtered through transformation and optimization, and finally the recycling purpose is achieved, the scraping plate can scrape impurities at the bottom of the concentration tank, and the impurities can interfere with the solid-liquid separation process in the concentration tank; by scraping impurities at the bottom, solid particles in ore pulp can be more sufficiently precipitated, the concentration of underflow is improved, and the concentrated ore pulp or sludge and the like are easier to subsequently treat, for example, in a dressing plant, the grade of concentrate can be higher, the moisture content can be reduced, and subsequent smelting and other procedures are facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of dehydration systems in thermal power plants, specifically to a secondary sedimentation device for a sedimentation tank in a dehydration chamber system. Background Technology

[0002] Currently, the dewatering system in thermal power plants generally uses two thickeners and one buffer tank to filter and settle the overflow sludge from the dewatering tank. The filtered sludge from the buffer tank is then pumped back to the boiler using a slurry pump, forming a cycle. The sludge remaining after filtration in the two thickeners settles at the bottom. A slurry pump installed at the bottom of the thickener is used to pump the sludge from the thickener back to the dewatering tank. Due to long-term operation and sedimentation, the bottom slurry pump cannot remove the sludge from the bottom of the thickener, causing blockages. This requires a large amount of manpower and time to clean the inside, resulting in environmental pollution and posing a significant threat to the safe operation of the system. Utility Model Content

[0003] The purpose of this invention is to provide a secondary sedimentation device for a sedimentation tank in a dehydration chamber system to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a secondary sedimentation device for a sedimentation tank in a dehydration chamber system, comprising a thickening tank, wherein a scraping mechanism is provided inside the thickening tank, and a sedimentation mechanism is provided at the bottom of the thickening tank.

[0005] The sedimentation mechanism includes a backwash pipe, which is fixedly connected between two thickening tanks. A second valve is fixedly connected to both sides of the backwash pipe. A water supply pipe is provided at the bottom of the backwash pipe, which is fixedly connected between the two thickening tanks. A first valve is fixedly connected to both sides of the water supply pipe.

[0006] Preferably, a first connecting pipe is fixedly connected to the middle of the bottom of the water conveying pipeline, a slurry pump is fixedly connected to the bottom of the first connecting pipe, and a second connecting pipe is fixedly connected to the bottom of the slurry pump. The second connecting pipe is designed to be curved. The slurry pump can transport the slurry at the bottom of the thickening tank.

[0007] Preferably, a dehydration chamber is fixedly connected to the bottom of the second connecting pipe, and a support frame is fixedly connected to the surface of the dehydration chamber. The dehydration chamber separates the water in the material from the solid particles through sedimentation, filtration and other methods, reducing the moisture content of materials such as coal slime and ash, which facilitates subsequent transportation, storage and processing.

[0008] Preferably, the thickening tank is circular in design, and two thickening tanks are provided, which are arranged symmetrically. The thickening tanks use gravity sedimentation to cause the solid particles in the suspension to settle to the bottom of the tank and separate from the liquid.

[0009] Preferably, the scraping mechanism includes a fixed frame, which is fixedly connected to the top of the thickener. A rotating rod is fixedly connected in the middle of the fixed frame, and a motor is fixedly connected to the top of the rotating rod. The motor is fixedly connected to the middle of the top of the fixed frame. The scraper can remove debris from the bottom of the thickener. The debris will interfere with the solid-liquid separation process in the thickener. Scraping away the debris at the bottom can make the solid particles in the slurry settle more fully, increase the underflow concentration, and make the thickened slurry or sludge easier to process later. The scraper is fixedly connected to the bottom of the rotating rod and is located at the bottom of the thickener.

[0010] Compared with the prior art, this utility model provides a secondary sedimentation device for a sedimentation tank in a dewatering chamber system, which has the following beneficial effects:

[0011] 1. The secondary sedimentation device of the sedimentation tank in this dewatering chamber system has a small safety hazard for personnel during construction due to the addition of external pipelines. Through modification and optimization, the slurry at the bottom of the thickening tank can be repeatedly sedimented and filtered, and finally recycled.

[0012] 2. The secondary sedimentation device in the sedimentation tank of this dewatering chamber system can remove debris from the bottom of the thickening tank using a scraper. Debris can interfere with the solid-liquid separation process in the thickening tank. Scraping away the debris from the bottom allows solid particles in the slurry to settle more fully, increasing the underflow concentration and making the thickened slurry or sludge easier to process in subsequent steps. For example, in a mineral processing plant, it can result in a higher grade of concentrate and a reduced moisture content, which is beneficial for subsequent smelting and other processes. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the sedimentation mechanism of this utility model;

[0016] Figure 3 This is a cross-sectional schematic diagram of the sedimentation mechanism of this utility model;

[0017] Figure 4 This is a schematic diagram of the scraping mechanism of this utility model.

[0018] In the diagram: 1. Thickening tank; 2. Sedimentation mechanism; 21. First valve; 22. First connecting pipe; 23. Dewatering chamber; 24. Support frame; 25. Second connecting pipe; 26. Slurry pump; 27. Water supply pipeline; 28. Second valve; 29. ​​Backwashing pipeline; 3. Scraper mechanism; 31. Rotating rod; 32. Motor; 33. Fixing frame; 34. Scraper. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides a technical solution:

[0021] Example 1:

[0022] Combination Figures 1 to 2 -3, A secondary sedimentation device for a sedimentation tank in a dehydration chamber system, comprising a thickening tank 1, a scraping mechanism 3 installed inside the thickening tank 1, and a sedimentation mechanism 2 installed at the bottom of the thickening tank 1.

[0023] The sedimentation mechanism 2 includes a backwash pipe 29, which is fixedly connected between the two thickening tanks 1. A second valve 28 is fixedly connected to both sides of the backwash pipe 29. A water supply pipe 27 is provided at the bottom of the backwash pipe 29, which is fixedly connected between the two thickening tanks 1. A first valve 21 is fixedly connected to both sides of the water supply pipe 27.

[0024] Furthermore, a first connecting pipe 22 is fixedly connected to the bottom middle of the water conveying pipe 27, a slurry pump 26 is fixedly connected to the bottom of the first connecting pipe 22, and a second connecting pipe 25 is fixedly connected to the bottom of the slurry pump 26. The second connecting pipe 25 is designed to be curved. The slurry pump 26 can be used to transport the slurry at the bottom of the thickening tank 1.

[0025] Furthermore, a dewatering chamber is fixedly connected to the bottom of the second connecting pipe 25, and a support frame 24 is fixedly connected to the surface of the dewatering chamber. The dewatering chamber separates the water in the material from the solid particles through sedimentation, filtration and other methods, reducing the moisture content of materials such as coal slime and ash, which facilitates subsequent transportation, storage and processing.

[0026] Furthermore, the thickening tank 1 is circular in design, and there are two thickening tanks 1 arranged symmetrically. Through gravity sedimentation, the solid particles in the suspension settle to the bottom of the tank and are separated from the liquid.

[0027] Example 2:

[0028] See Figure 4 Furthermore, based on Embodiment 1, the scraping mechanism 3 further includes a fixed frame 33, which is fixedly connected to the top of the thickening tank 1. A rotating rod 31 is fixedly connected in the middle of the fixed frame 33, and a motor 32 is fixedly connected to the top of the rotating rod 31. The motor 32 is fixedly connected to the middle of the top of the fixed frame 33. The scraper 34 can achieve the purpose of scraping away debris at the bottom of the thickening tank 1. The debris will interfere with the solid-liquid separation process in the thickening tank 1. Scraping away the debris at the bottom can make the solid particles in the slurry settle more fully, increase the underflow concentration, and make the thickened slurry or sludge easier to process later. The scraper 34 is fixedly connected to the bottom of the rotating rod 31 and is located at the bottom of the thickening tank 1.

[0029] In actual operation and industrial production, the thickener 1 is a key piece of equipment for solid-liquid separation. Its operating efficiency and separation effect have a crucial impact on subsequent production processes. In order to further improve the working performance of the thickener 1 and solve the problem of slurry treatment in traditional processes, we have implemented a series of targeted modifications to the thickener 1.

[0030] One of the core measures of this renovation is to add a large-diameter water conveying pipe 27 at the bottom of the thickening tank 1. This design greatly improves the slurry conveying capacity. With the use of the slurry pump 26, the slurry at the bottom of the thickening tank 1 can be quickly and efficiently transported back to the dewatering chamber to achieve secondary sedimentation. This not only helps to improve the sedimentation effect, but also provides better conditions for subsequent dewatering treatment.

[0031] Considering that slurry is prone to accumulate in the pipeline, causing blockage and affecting the normal operation of the system, we installed a backwashing device inside the newly laid pipeline. The backwashing pipeline 29 continuously flushes the slurry at the bottom of the thickening tank 1 with a continuous flow of water, ensuring that the slurry is always in a flowing state, avoiding the pipeline blockage problem caused by slurry deposition, and effectively ensuring the stable operation of the entire conveying system.

[0032] In addition, to address the interference of debris at the bottom of the thickener 1 on the solid-liquid separation effect, we equipped the thickener 1 with a debris scraping device. This device consists of a motor 32, a rotating rod 31, and a scraper 34. When it is necessary to clean the bottom of the thickener 1, the motor 32 is started, which drives the rotating rod 31 to rotate smoothly, thereby driving the scraper 34 to scrape away the debris at the bottom of the tank. These debris, such as larger particles of impurities and lumps formed by sedimentation, will seriously interfere with the solid-liquid separation process in the thickener 1. After scraping away the debris at the bottom, the solid particles in the slurry can settle more fully, thereby significantly increasing the underflow concentration.

[0033] The optimized thickener 1 has shown significant advantages in practical applications. Taking a mineral processing plant as an example, the solid content of the slurry underflow treated by thickener 1 is greatly increased, the grade of the concentrate is higher, and the moisture content is significantly reduced, which lays a good foundation for subsequent smelting and other processes. It not only improves product quality, but also effectively reduces production costs and improves production efficiency.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A secondary sedimentation device for a dewatering system sedimentation tank, comprising a thickening tank (1), characterized in that: The concentration tank (1) is provided with a scraping mechanism (3), and the bottom of the concentration tank (1) is provided with a sedimentation mechanism (2); The sedimentation mechanism (2) comprises a backwashing pipeline (29), the two sides of the backwashing pipeline (29) are fixedly connected between the two concentration tanks (1), the second valve (28) is fixedly connected to the surface of the two sides of the backwashing pipeline (29), the water conveying pipeline (27) is arranged at the bottom of the backwashing pipeline (29), the water conveying pipeline (27) is fixedly connected between the two concentration tanks (1), and the first valve (21) is fixedly connected to the surface of the two sides of the water conveying pipeline (27).

2. The secondary sedimentation device of a dewatering system sedimentation tank according to claim 1, characterized in that: The first connecting pipe (22) is fixedly connected to the middle of the bottom of the water conveying pipeline (27), the slurry pump (26) is fixedly connected to the bottom of the first connecting pipe (22), the second connecting pipe (25) is fixedly connected to the bottom of the slurry pump (26), and the second connecting pipe (25) is designed to be curved.

3. The secondary sedimentation device of a dewatering system sedimentation basin according to claim 2, characterized in that: The second connecting pipe (25) is fixedly connected to the bottom of the dehydration bin, and the support frame (24) is fixedly connected to the surface of the dehydration bin.

4. The secondary sedimentation device of a dewatering system sedimentation basin according to claim 1, characterized in that: The concentration tank (1) is designed in a circular shape, the number of the concentration tanks (1) is two, and the two concentration tanks (1) are symmetrically arranged.

5. The secondary sedimentation device of a dewatering system sedimentation basin according to claim 1, characterized in that: The scraping mechanism (3) comprises a fixed frame (33), the fixed frame (33) is fixedly connected to the top of the concentration tank (1), the rotating rod (31) is fixedly connected to the middle of the fixed frame (33), the motor (32) is fixedly connected to the top of the fixed frame (33), and the motor (32) is fixedly connected to the middle of the top of the fixed frame (33).

6. The secondary sedimentation device of a dewatering system sedimentation basin according to claim 5, characterized in that: The rotating rod (31) is fixedly connected to the bottom of the scraper (34), and the scraper (34) is arranged at the bottom of the concentration tank (1).

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