A wet desulfurization spray tower efficiency device

Abstract

The present application relates to desulfurization tower technical field, propose a kind of wet desulphurization spray tower synergistic device, for being installed in the spray layer below of spray tower, including: top plate, setting in the inside of spray tower, and located below spray layer, top plate has several first through holes on it;Bottom plate, setting below top plate, bottom plate has several second through holes on it, the outer periphery of bottom plate has annular overflow edge on upper end, and the outer periphery of bottom plate has overflow channel communicated with the upper and lower sides of bottom plate;Scraper, several scrapers are arranged in annular array on a main shaft, the main shaft is rotatably arranged relative to bottom plate, the lower end of scraper slides on the upper end of bottom plate, and the lower end of scraper is lower than the upper end of overflow edge. Through the above technical scheme, the problem that the existing synergistic device cannot effectively break up bubbles and is prone to fouling and blockage is solved.

Description

Technical Field

[0001] This invention relates to the field of desulfurization tower technology, and in particular to an efficiency-enhancing device for wet desulfurization spray towers. Background Technology

[0002] The thermal power plant uses a wet desulfurization process to remove sulfur dioxide from the flue gas. The core equipment is a spray tower, in which desulfurization slurry is sprayed downward through a spray layer inside the tower to fully contact the upward-flowing sulfur-containing flue gas.

[0003] Existing technologies use efficiency-enhancing devices to improve desulfurization efficiency, typically employing methods such as extending the gas-liquid contact channel, uniformly dispersing the airflow, and using fixed sieve plates or porous trays. However, when a porous structure is set up, the liquid accumulation above the holes is relatively thick, and when the gas passes through the holes, it cannot be effectively dispersed into small bubbles, resulting in a limited increase in the gas-liquid contact area. At the same time, the presence of static liquid accumulation can easily lead to blockage and affect gas flow.

[0004] The existing efficiency enhancement devices cannot effectively disperse air bubbles, and the problem of scaling and clogging is easy to be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a wet desulfurization spray tower efficiency enhancement device in response to the above-mentioned technical deficiencies. This device solves the problem that existing efficiency enhancement devices cannot effectively disperse air bubbles and are prone to scaling and clogging.

[0006] The technical solution adopted in this invention is: to provide a wet desulfurization spray tower efficiency enhancement device, for installation below the spray layer of the spray tower, characterized in that it includes: A top plate is installed inside the spray tower and below the spray layer, and the top plate has several first through holes; A base plate is disposed below the top plate. The base plate has several second through holes, an annular overflow edge at the upper outer periphery of the base plate, and an overflow channel communicating with the upper and lower sides of the base plate. A number of scrapers are arranged in a circular array on a main shaft, which is rotatably arranged relative to the base plate. The lower end of the scraper slides on the upper end of the base plate and is lower than the upper end of the overflow edge.

[0007] To further optimize this technical solution, the scraper is inclined in the vertical direction.

[0008] To further optimize this technical solution, the scraper has several transverse through-holes.

[0009] To further optimize this technical solution, the inner wall of the water passage hole has several protrusions.

[0010] To further optimize this technical solution, a brush is provided at the upper end of the scraper, and the upper end of the brush slides against the lower end of the top plate.

[0011] Further optimization of this technical solution also includes: The mounting box is fixed inside the spray tower. The top plate is fixed to the upper end of the mounting box, and the bottom plate is located inside the mounting box. The mounting box has an annular water seal groove inside. The lower outer periphery of the bottom plate has an annular guide plate that extends to the bottom of the water seal groove. The bottom end of the mounting box inside the water seal groove has several third through holes. Gas entering the spray tower passes upward through the third through holes, the second through holes, and the first through holes in sequence.

[0012] To further optimize this technical solution, the diameter of the second through hole is smaller than the diameter of the third through hole.

[0013] To further optimize this technical solution, the outer perimeter of the mounting box is sealed and fixedly connected to the inner wall of the spray tower.

[0014] To further optimize this technical solution, the upper end of the main shaft passes through the top plate and then drives the external drive unit.

[0015] The beneficial effects of this invention are as follows: 1. Excessive water accumulation (referring to the desulfurization slurry sprayed from the spray layer) can easily cause large air bubbles. By setting the overflow edge, the maximum thickness of water accumulation above the bottom plate can be controlled. The lower end of the scraper can rotate close to the upper end of the bottom plate to scrape water, further controlling the thickness of water accumulation above the through holes, while effectively breaking up air bubbles.

[0016] 2. With a thin layer of water and strong water flow caused by the scraper, the air-liquid contact is sufficient. The scraper can clean the upper part of the base plate, reducing scale buildup in the second through hole and reducing blockage.

[0017] 3. Between the top and bottom plates, the rotation of the scraper can agitate water droplets, increasing the probability of contact between the water droplets and the gas. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the lower view structure of the present invention; Figure 3 This is a top view schematic diagram of the structure of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure at position AA; Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at point a in the middle; Figure 6 This is a schematic diagram of the scraper mounting structure of the present invention; Figure 7 This is a partial structural diagram of the scraper of the present invention; Figure 8 This is a schematic diagram of the inclined scraper structure of the present invention; The markings in the diagram are as follows: 1. Top plate; 101. First through hole; 2. Bottom plate; 201. Second through hole; 202. Overflow edge; 203. Overflow channel; 204. Guide plate; 3. Scraper; 301. Water passage hole; 3011. Protrusion; 302. Brush; 303. Main shaft; 4. Mounting box; 401. Water seal groove; 402. Third through hole. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figure 1-8 As shown, a wet desulfurization spray tower efficiency enhancement device is installed below the spray layer of the spray tower, comprising: Top plate 1 is installed inside the spray tower and located below the spray layer. The top plate 1 has a plurality of first through holes 101. The bottom plate 2 is located below the top plate 1. The bottom plate 2 has several second through holes 201. The upper outer periphery of the bottom plate 2 has an annular overflow edge 202. The outer periphery of the bottom plate 2 has an overflow channel 203 that communicates with the upper and lower sides of the bottom plate 2. Scraper 3, several scraper 3 are arranged in a circular array on a main shaft 303, the main shaft 303 is rotatably arranged relative to the base plate 2, the lower end of the scraper 3 slides on the upper end of the base plate 2, and the lower end of the scraper 3 is lower than the upper end of the overflow edge 202.

[0024] In use, this invention is installed inside the spray tower body and below the spray layer. Gas enters from the lower part of the tower body and moves upward. Water (referring to desulfurization slurry) is sprayed downward from the spray layer. The water falls onto the top plate 1, accumulates on the top plate 1, and flows downward from the first through hole 101. Between the top plate 1 and the bottom plate 2, the water flows downward evenly. Water accumulates at the upper end of the bottom plate 2. After the accumulated water is higher than the overflow line 202, it naturally flows downward from the outer overflow channel 203, controlling the thickness of the accumulated water on the bottom plate 2. The water flows into the lower part of the tower body through the second through hole 201 and is evenly dispersed through the second through hole 201.

[0025] When the gas enters the lower part of the tower, it rises through the second through-hole 201 and the first through-hole 101. During its upward movement, it comes into contact with the water that has dispersed after passing through the first through-hole 101 and the second through-hole 201. As the gas moves upward from below the bottom plate 2 through the second through-hole 201, there is a thin layer of water on the upper side of the bottom plate 2. The gas comes into contact with or is enveloped by the upper water layer after passing through the second through-hole 201, and is broken up by the rotating scraper 3, reducing large bubbles. The lower part of the scraper 3 is immersed in the water accumulated on the upper side of the bottom plate 2. When the scraper 3 rotates, it carries water to impact the bubbles, allowing the gas bubbles to quickly come into contact with more water, rather than directly overflowing and diffusing into the air after impacting the bubbles. At the same time, it refreshes the water on the upper side of the second through-hole 201, forcibly blocking individual large bubbles. Then the gas continues to rise, and when it passes through the first through-hole 101, it comes into efficient contact with the water on the top plate 1 again. After passing through the bottom plate 2, the gas comes into contact with the water sprayed down from the spray layer.

[0026] Furthermore, the scraper 3 is inclined in the vertical direction.

[0027] In use, the vertically inclined scraper 3, combined with the rotation direction, can achieve a stronger upward or downward water transport effect, enhancing water flow. Taking upward water transport as an example, when the scraper 3 rotates with the main shaft 303, it can transport the water on the bottom plate 2 upward along the scraper 3, achieving rapid water scraping to control the water accumulation thickness. Simultaneously, when the area between the bottom plate 2 and the top plate 1 is not completely filled with water, the upward-moving water carried by the scraper 3 surface can achieve water coverage within the vertical space, allowing more water to contact the gas. When the area between the top plate 1 and the bottom plate 2 is full of water, it is difficult to achieve the effect of impacting and breaking up air bubbles, and energy consumption is high. In this invention, the scraper 3 does not need to rotate at extremely high speeds; the scraper 3 is densely distributed circumferentially, and its rotation can quickly break up air bubbles, allowing water to move upward along the inclined surface of the scraper 3.

[0028] Furthermore, the scraper 3 has several transversely penetrating water passage holes 301.

[0029] During use, water moving upwards on the surface of scraper 3 can pass over the top of scraper 3 and fall downwards, forming a waterfall. Water also falls through the first through-hole 101, increasing the density of the waterfall and its contact with the gas. A water passage hole 301 is added in the middle of scraper 3, allowing some water to flow through it to the other side of scraper 3 and fall, further increasing the waterfall density. The splash angles of the falling water also differ, resulting in a denser distribution.

[0030] The water passage 301 extends horizontally through the space, connecting the spaces between adjacent scrapers 3. A reinforcing ring can be used to fix the outer ring of each scraper 3 to the end furthest from the main shaft 303, improving structural stability.

[0031] Furthermore, the inner wall of the water passage 301 has several protrusions 3011.

[0032] During use, the protrusions 3011 inside the water passage 301 can be randomly dispersed, which can further disrupt water splashing, reduce water droplet volume, and increase density. The protrusions 3011 can be spike-shaped, columnar, or similar structures.

[0033] Furthermore, a brush 302 is provided on the upper end of the scraper 3, and the upper end of the brush 302 slides against the lower end of the top plate 1.

[0034] When in use, the brush 302 at the upper end of the scraper 3 can clean the lower end of the top plate 1 and the first through hole 101, reducing blockage and also guiding the water in the first through hole 101 downwards. At the same time, the gaps between the brushes 302 can disperse the air flow and the falling water, enhancing the contact between the gas and water.

[0035] The brush 302 can be made of a material with a certain degree of elasticity, and can be ejected after being blocked by the first through hole 101. For the sake of simplicity and clarity, the brush 302 in the illustration does not represent the actual density.

[0036] Furthermore, it also includes: Mounting box 4 is fixed inside the spray tower. Top plate 1 is fixed to the upper end of mounting box 4. Bottom plate 2 is located inside mounting box 4. The mounting box 4 has an annular water seal groove 401 inside. The lower outer periphery of bottom plate 2 has an annular guide plate 204. The guide plate 204 extends to the bottom of the water seal groove 401. The bottom end of mounting box 4 inside the water seal groove 401 has several third through holes 402. Gas entering the spray tower passes upward sequentially through the third through holes 402, the second through holes 201, and the first through holes 101.

[0037] Furthermore, the diameter of the second through hole 201 is smaller than the diameter of the third through hole 402.

[0038] Furthermore, the outer periphery of the mounting box 4 is sealed and fixedly connected to the inner wall of the spray tower.

[0039] During use, it can be fixedly installed inside the tower body through the mounting box 4, and the gas flow path can be restricted by the water seal groove 401.

[0040] Water can only fall from the top plate 1 to the bottom plate 2 through the first through hole 101. On the floor, it can fall through the second through hole 201 or overflow from the overflow channel 202. There is an annular overflow channel 203 between the bottom plate 2 and the side wall of the mounting box 4. Water gathers in the water seal groove 401. The water seal groove 401 is "U" shaped and has a certain depth. The guide plate 204 extends into the water seal groove 401. Then, the gas enters through the third through hole 402. The outer perimeter of the gas between the bottom plate 2 and the bottom of the mounting box 4 is the environmental water seal with a certain depth. Gas overflowing from the water seal groove 401 or pushing the liquid upward requires overcoming a large water pressure, so it is a channel with a certain resistance. Therefore, the gas can only rise from the second through hole 201.

[0041] The water seal groove 401 not only receives the water that overflows from the bottom plate 2 to control the thickness of the accumulated water, but also seals the channel for gas flow.

[0042] The third through hole 402 at the bottom of the mounting box 4 in the inner ring disk space of the water seal groove 401 can enhance the contact between gas and water. The diameter of the third through hole 402 can be large to reduce resistance. The entire inner ring disk space can also be a large opening structure that runs through the top and bottom.

[0043] Furthermore, the upper end of the main shaft 303 passes through the top plate 1 and is driven by an external drive unit.

[0044] In use, the spindle 303 can be driven by conventional technical means, which will not be shown in this application.

[0045] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A wet desulfurization spray tower efficiency enhancement device, used for installation below the spray layer of the spray tower, characterized in that, include: A top plate (1) is installed inside the spray tower and located below the spray layer. The top plate (1) has several first through holes (101). The bottom plate (2) is located below the top plate (1). The bottom plate (2) has several second through holes (201). The upper outer periphery of the bottom plate (2) has an annular overflow edge (202). The outer periphery of the bottom plate (2) has an overflow channel (203) that communicates with the upper and lower sides of the bottom plate (2). Scraper (3), several scrapers (3) are arranged in a ring array on a main shaft (303), the main shaft (303) is rotatably arranged relative to the base plate (2), the lower end of the scraper (3) slides on the upper end of the base plate (2), and the lower end of the scraper (3) is lower than the upper end of the overflow edge (202).

2. The wet desulfurization spray tower efficiency enhancement device according to claim 1, characterized in that, The scraper (3) is inclined in the vertical direction.

3. The wet desulfurization spray tower efficiency enhancement device according to claim 2, characterized in that, The scraper (3) has several transverse through-holes (301).

4. The wet desulfurization spray tower efficiency enhancement device according to claim 3, characterized in that, The inner wall of the water passage (301) has several protrusions (3011).

5. The wet desulfurization spray tower efficiency enhancement device according to claim 1, characterized in that, The scraper (3) is provided with a brush (302) at its upper end, and the upper end of the brush (302) slides against the lower end of the top plate (1).

6. The wet desulfurization spray tower efficiency enhancement device according to claim 1, characterized in that, Also includes: The mounting box (4) is fixed inside the spray tower. The top plate (1) is fixed to the upper end of the mounting box (4). The bottom plate (2) is located inside the mounting box (4). The mounting box (4) has an annular water seal groove (401) inside. The lower outer periphery of the bottom plate (2) has an annular guide plate (204). The guide plate (204) extends to the bottom of the water seal groove (401). The bottom end of the mounting box (4) located inside the water seal groove (401) has several third through holes (402). The gas entering the spray tower passes upward sequentially through the third through holes (402), the second through holes (201), and the first through holes (101).

7. The wet desulfurization spray tower efficiency enhancement device according to claim 6, characterized in that, The diameter of the second through hole (201) is smaller than the diameter of the third through hole (402).

8. The wet desulfurization spray tower efficiency enhancement device according to claim 6, characterized in that, The outer periphery of the installation box (4) is sealed and fixedly connected to the inner wall of the spray tower.

9. The wet desulfurization spray tower efficiency enhancement device according to claim 1, characterized in that, The upper end of the main shaft (303) passes through the top plate (1) and then drives the external drive unit.

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