Alkali recovery green liquor clarifier facilitating slagging

Abstract

The utility model relates to a kind of alkali recovery green liquid clarifying tank convenient to deslag, involve clarifying tank technical field, including pool body, stirring subassembly and spraying subassembly, the pool body bottom is double-cone bottom structure, including main cone bottom and vice cone bottom, main cone bottom is located in pool body center, vice cone bottom surrounds main cone bottom outside, the inside of vice cone bottom is circular equidistance array with multiple inclined discharge plate;Beneficial effect: by main cone bottom and vice cone bottom instead of gentle slope or flat bottom structure pool body, as far as possible can prevent pool bottom to continue to accumulate deposit, by stirring subassembly, vice cone bottom inside deposit can be cleaned, spraying subassembly can flush drain, so it can be convenient to prevent deposit caused by blockage, to a certain extent, production process can be carried out shutdown maintenance caused by blockage, the continuity of production is guaranteed, and operation and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of clarifier technology, and in particular to an alkali recovery green liquor clarifier that facilitates slag discharge. Background Technology

[0002] The alkali recovery green liquor clarification tank is a key solid-liquid separation device in the alkali recovery process of the pulp and paper industry. It is mainly used to treat the "green liquor" formed after the cooking waste liquor is evaporated and concentrated. Suspended impurities (such as green mud) are removed through physical or chemical means to ensure the stability of subsequent causticizing processes and the efficiency of alkali recovery. In the alkali recovery process of the paper industry, the green liquor clarification tank is used to separate solid impurities (such as silicates and carbonates) from the green liquor produced after the combustion of black liquor.

[0003] The existing bottom structure design of clarification tanks for alkali recovery green liquor generally suffers from a single defect. Because the inner wall of the clarification tank slopes vertically downwards, the sediment falls and accumulates together, resulting in uneven accumulation at the bottom of the tank. This causes inconvenience for personnel in later cleaning, requiring cleaning of most areas, and also makes it difficult for the conveying device connected to the bottom center to discharge sludge and impurities. Utility Model Content

[0004] This invention provides an alkali recovery green liquor clarification tank that facilitates slag discharge, solving the structural problem of the aforementioned clarification tanks where the inner wall slopes vertically downwards, causing sediment to fall and accumulate, resulting in uneven accumulation at the bottom of the tank.

[0005] The present invention provides the following solution to the above-mentioned technical problems: A green liquor clarification tank for alkali recovery that facilitates slag discharge includes a tank body, a stirring assembly, and a spraying assembly. The bottom of the tank body has a double-cone bottom structure, including a main cone bottom and a secondary cone bottom. The main cone bottom is located at the center of the tank body, and the secondary cone bottom surrounds the outside of the main cone bottom. The interior of the secondary cone bottom has multiple inclined discharge plates arranged in a circular, equidistant array. Multiple drainage outlets are provided inside the secondary cone bottom away from the multiple inclined discharge plates. A discharge pipe is connected to one side of each of the multiple drainage outlets. A valve is provided at the top of each of the multiple discharge pipes. A conveying pipe is provided on one side of the secondary cone bottom.

[0006] The beneficial effects of this utility model are as follows: the pool body is mainly for easy storage of green liquid; the stirring component can easily clean the inside of the secondary cone bottom by rotating and using an L-shaped scraper; the spray component can spray and rinse the drain outlet to prevent blockage; the main cone bottom is located in the center of the pool body with a slope of 45°~60°; the secondary cone bottom surrounds the outside of the main cone bottom with a slope of 30°~40°, forming a graded sedimentation area and reducing dead corners; multiple inclined discharge plates increase the sedimentation area and accelerate the settling of solid particles; the drain outlet can easily discharge the clarified green liquid; the discharge pipe can easily transport and discharge the green liquid; the valve can control the flow rate discharged from the discharge pipe; and the set conveying pipe can easily transport the green liquid that needs clarification into the interior of the pool body.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the stirring assembly includes two L-shaped support bodies, which are disposed on the top of the tank.

[0009] The beneficial effect of adopting the above-mentioned further solution is that the L-shaped bracket can support the mounting base.

[0010] Furthermore, a mounting base is provided between opposite sides of each of the L-shaped brackets, and a speed-regulating motor is provided at the bottom of the mounting base.

[0011] The beneficial effects of adopting the above-mentioned further solution are: the mounting base can facilitate the installation and support of the speed-regulating motor, and the speed-regulating motor can easily rotate with the rotating rod.

[0012] Furthermore, the output shaft of the speed-regulating motor is provided with a rotating rod, and a connecting seat is provided at the bottom of the rotating rod.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the connecting seat can rotate, and the connecting seat can connect to the rotating rod.

[0014] Furthermore, a rotating rod is installed at the bottom of the connecting seat, and multiple connecting columns are arranged in a linear equidistant array at the bottom of the rotating rod, with an L-shaped scraper provided between the bottoms of the multiple connecting columns.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the rotating rod can be connected to the L-shaped scraper through multiple connecting columns. The L-shaped scraper can facilitate the scraping and cleaning of the inside of the sub-cone bottom, preventing excessive accumulation and blockage.

[0016] Furthermore, the spray assembly includes four mounting rods, which are positioned at the top of the pool body. Each of the four mounting rods has an annular box installed at its bottom. The bottom of the annular box has multiple nozzles arranged in a circular, equidistant array. A water supply pipe is connected to one side of the annular box.

[0017] The beneficial effects of adopting the above-mentioned further solution are: the mounting rod can be connected to the ring box, the ring box can easily store clean water inside, allowing the clean water to be delivered to multiple nozzles, allowing multiple nozzles to spray and clean the bottom of the secondary cone, and the water supply pipe can be easily connected to an external water supply pipeline.

[0018] Beneficial effects: By replacing the vertical downward slope of the inner wall of the clarifier with the main cone bottom and the secondary cone bottom, a graded sedimentation area can be formed using the main cone bottom and the secondary cone bottom, reducing dead corners and allowing sediment to flow to the central area. This prevents uneven accumulation of sediment caused by sediment falling and piling up together, making it easier for personnel to clean the sediment in a concentrated manner later. It also facilitates the connection of the conveying device at the bottom of the tank to transport and discharge impurities.

[0019] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This utility model provides a front sectional view of an alkali recovery green liquor clarification tank that facilitates slag discharge. Figure 2 This utility model provides a side sectional view of an alkali recovery green liquor clarification tank that facilitates slag discharge. Figure 3 This utility model presents a three-dimensional view of a spray assembly for an alkali recovery green liquor clarification tank that facilitates slag discharge.

[0021] Legend: 1. Tank body; 2. Mixing assembly; 3. Spraying assembly; 11. Main cone bottom; 12. Secondary cone bottom; 4. Inclined discharge plate; 5. Drain outlet; 6. Discharge pipe; 7. Valve; 8. Conveying pipe; 21. L-shaped support body; 22. Mounting base; 23. Speed ​​regulating motor; 24. Rotating rod; 25. Connecting base; 26. Rotating rod; 27. Connecting column; 28. L-shaped scraper; 31. Mounting rod; 32. Annular box; 33. Spray head; 34. Water supply pipe. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-3The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model. Example 1

[0023] like Figure 1-3 As shown, this utility model discloses an alkali recovery green liquor clarification tank for easy slag discharge, comprising a tank body 1, a stirring assembly 2, and a spraying assembly 3. The tank body 1 is mainly for storing green liquor and consists of a main conical bottom 11 and a secondary conical bottom 12. The main conical bottom 11 is located at the center of the tank body 1 with a slope of 45°~60°. The secondary conical bottom 12 surrounds the outside of the main conical bottom 11 with a slope of 30°~40°, forming a graded sedimentation area and reducing dead zones. The interior of the secondary conical bottom 12 has multiple inclined discharge plates 4, which can increase the sedimentation area and accelerate the settling of solid particles. The main conical bottom... A conveying device can be installed at the bottom of the main cone bottom 11 to convey and discharge impurities. When no sediment discharge is being performed, the bottom of the main cone bottom 11 is blocked by the feed end of the conveying device to accumulate sediment. When discharge is required, the feed end of the conveying device is opened, and the sediment at the bottom of the main cone bottom 11 falls into the conveying device, thereby achieving the purpose of conveying and discharging all sediment. It should be noted that, depending on the requirements, the discharge of the conveying device can be carried out after the green liquid has been completely discharged, or it can be carried out when some green liquid remains and cannot be completely discharged. Example 2

[0024] like Figure 1-3 As shown, the stirring assembly 2 includes two L-shaped support bodies 21, which are set on the top of the tank body 1. The L-shaped support bodies 21 are connected to mounting bases 22. The mounting bases 22 can install speed-regulating motors 23 at the bottom. The speed-regulating motors 23 can rotate rotating rods 24, which can rotate connecting bases 25. The connecting bases 25 can easily connect and install rotating rods 26 by bolts. The rotating rods 26 are connected to L-shaped scrapers 28 through multiple connecting columns 27. The spraying assembly 3 includes four mounting rods 31, which are set on the top of the tank body 1. Each of the four mounting rods 31 has an annular box 32 installed at its bottom. The bottom of the annular box 32 has multiple nozzles 33 arranged in a circular equidistant array. A water supply pipe 34 is connected to one side of the annular box 32.

[0025] In this embodiment, the L-shaped bracket 21 can support the mounting base 22, which can easily support the speed-regulating motor 23. The speed-regulating motor 23 can easily rotate the rotating rod 24 and the connecting seat 25. The connecting seat 25 is installed and connected to the rotating rod 26. The rotating rod 26 is connected to the L-shaped scraper 28 through multiple connecting columns 27, so that the L-shaped scraper 28 can rotate. The L-shaped scraper 28 contacts the inside of the sub-cone bottom 12 and is rotated to scrape away the sediment inside. The mounting rod 31 can be installed and connected to the annular box 32, which can easily store clean water inside and deliver the clean water to multiple nozzles 33 so that the multiple nozzles 33 can spray and clean the inside of the sub-cone bottom 12. The water supply pipe 34 can be easily connected to an external water supply pipe 34.

[0026] Working principle: When green liquor sedimentation is required, first connect the delivery pipe 8 to the green liquor delivery pipe, allowing the green liquor to flow into the interior of the pool 1 through the delivery pipe 8. Since the pool 1 is composed of a main cone bottom 11 and a secondary cone bottom 12, the main cone bottom 11 is located in the center of the pool 1 with a slope of 45°~60°, and the secondary cone bottom 12 surrounds the outside of the main cone bottom 11 with a slope of 30°~40°, forming a graded sedimentation area. The secondary cone bottom 12 reduces the flow velocity through a gentle slope, prolongs the particle residence time, promotes the aggregation and sedimentation of small particles under the action of flocculant, and improves the clarity of the green liquor. The steep slope of the main cone bottom 11 uses gravity to accelerate the rapid sedimentation of large particles, reducing the residence time of particles at the bottom of the pool, replacing the vertical downward slope of the inner wall of the clarification pool. In this way, the main cone bottom and the secondary cone bottom can form a graded sedimentation area, reducing dead corners, allowing the sediment to flow to the central area, preventing uneven accumulation caused by sediment falling and accumulating together, facilitating the later centralized cleaning of sediment by personnel, and also facilitating the connection of the delivery device at the bottom of the pool to transport and discharge impurities. When it is necessary to discharge the clear green liquor, the drain outlet 5 can be used to facilitate the discharge of the clear green liquor, the discharge pipe 6 can facilitate the transportation and discharge of the green liquor, and the valve 7 can control the flow rate discharged from the discharge pipe 6. After cleaning and removing impurities from the inside of the pool, the water supply pipe 34 is connected to the external water supply pipe 34, allowing clean water to be delivered to multiple nozzles 33 on the annular box 32. The multiple nozzles 33 can be used to rinse the inside of the sub-cone bottom 12, making it easier for personnel to clean the inside of the pool after cleaning. When it is necessary to clean the sediment adhering to the inner surface of the sub-conical bottom 12, the speed-regulating motor 23 can easily rotate the rotating rod 24 and the connecting seat 25. The connecting seat 25 is installed and connected to the rotating rod 26. The rotating rod 26 is connected to the L-shaped scraper 28 through multiple connecting posts 27, so that the L-shaped scraper 28 can be rotated. The L-shaped scraper 28 contacts the inside of the sub-conical bottom 12 and the sediment inside is scraped off by rotation.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A clarification tank for alkali recovery green liquor that facilitates slag discharge, comprising a tank body (1), a stirring assembly (2), and a spraying assembly (3), characterized in that: The bottom of the pool body (1) is a double cone bottom structure, including a main cone bottom (11) and a secondary cone bottom (12). The main cone bottom (11) is located at the center of the pool body (1), and the secondary cone bottom (12) surrounds the outside of the main cone bottom (11). The interior of the secondary cone bottom (12) has a circular equidistant array of multiple inclined discharge plates (4). The interior of the secondary cone bottom (12) is provided with multiple drain outlets (5) away from the multiple inclined discharge plates (4). One side of each of the multiple drain outlets (5) is connected to a discharge pipe (6). The top of each of the multiple discharge pipes (6) is provided with a valve (7). One side of the secondary cone bottom (12) is provided with a conveying pipe (8). The slope of the main cone bottom (11) is 45°~60°, and the slope of the secondary cone bottom (12) is 30°~40°.

2. The alkali recovery green liquor clarification tank with easy slag discharge according to claim 1, characterized in that: The stirring assembly (2) includes two L-shaped support bodies (21), which are arranged on the top of the pool body (1).

3. The alkali recovery green liquor clarification tank for easy slag discharge according to claim 2, characterized in that: Each of the L-shaped brackets (21) is provided with a mounting base (22) between opposite sides, and a speed-regulating motor (23) is provided at the bottom of the mounting base (22).

4. The alkali recovery green liquor clarification tank with easy slag discharge according to claim 3, characterized in that: The output shaft of the speed-regulating motor (23) is provided with a rotating rod (24), and the bottom of the rotating rod (24) is provided with a connecting seat (25).

5. The alkali recovery green liquor clarification tank with easy slag discharge according to claim 4, characterized in that: A rotating rod (26) is installed at the bottom of the connecting seat (25). The bottom of the rotating rod (26) has multiple connecting columns (27) arranged in a linear equidistant array. An L-shaped scraper (28) is provided between the bottoms of the multiple connecting columns (27).

6. The alkali recovery green liquor clarification tank for easy slag discharge according to claim 1, characterized in that: The spray assembly (3) includes four mounting rods (31), which are set on the top of the pool body (1). A ring box (32) is installed at the bottom of each of the four mounting rods (31). The bottom of the ring box (32) has multiple nozzles (33) arranged in a circular equidistant array. A water supply pipe (34) is connected to one side of the ring box (32).

Images