Anti-caking flue gas scrubbing tower

Abstract

The utility model relates to flue gas scrubbing equipment technical field, concretely relates to anti -caking flue gas scrubbing tower, including tower body, the bottom of tower body is equipped with lye circulation export, is equipped with lye circulation pipe on lye circulation export, tower body side is equipped with flue gas export, and the top of tower body is equipped with venturi injection mixer, and venturi injection mixer import connects lye circulation pipe, and venturi injection mixer export communicates the inner chamber of tower body, and venturi injection mixer suction port connects flue gas pipeline, and venturi injection mixer includes casing and the nozzle that sets up in the casing, and the fixed ring block is fixed in the casing, and the inner wall between fixed ring block is equipped with the sliding sleeve with the nozzle outer wall, and the sliding sleeve and nozzle outer wall and fixed ring block inner wall all slidingly connect, and the annular rack is equipped at the top of sliding sleeve, and the hook strip is equipped at the bottom of sliding sleeve, and the hook strip and nozzle wall slidingly adhere;Fixed ring block upper portion is equipped with the gear that is engaged with annular rack, and the gear connects motor, the utility model discloses can effectively prevent and eliminate the caking in venturi injection mixer.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas scrubbing equipment, specifically to an anti-caking flue gas scrubbing tower. Background Technology

[0002] Flue gas scrubbing towers are key equipment in industrial waste gas treatment, widely used in petrochemical, power, and metallurgical industries. They are primarily used to remove pollutants such as sulfur dioxide and particulate matter from flue gas. Their working principle involves a chemical reaction between an alkaline solution (such as limestone slurry) and the flue gas, thereby achieving the absorption and purification of pollutants.

[0003] Venturi injectors can be used to introduce flue gas into a scrubbing tower. Specifically, the alkali solution is ejected at high speed as it passes through the Venturi injector mixer, converting pressure energy into velocity energy. This reduces the pressure in the intake zone, creating a negative pressure. The flue gas is then drawn into the Venturi injector mixer by the high-speed injected reaction liquid, mixed with the reaction liquid, and then ejected at high speed. However, this design has the following problems in actual operation:

[0004] Due to the high temperature of the flue gas and the large content of suspended solids in the circulating slurry, both easily aggregate to form lumps on the inner wall of the Venturi injector and at the contact points between the flue gas and the slurry. If these lumps are not cleaned in time, they can cause blockages, forcing the system to shut down and severely affecting the continuity of production. Traditional injectors lack effective anti-caking measures, requiring frequent shutdowns and manual cleaning after scaling occurs. However, injectors are usually installed at a high position, requiring scaffolding for cleaning, which not only consumes a lot of manpower but also poses safety hazards.

[0005] To address the aforementioned issues, there is an urgent need for a flue gas scrubbing tower system that can effectively prevent agglomeration, thereby reducing maintenance costs and improving operational stability. Utility Model Content

[0006] The technical problem to be solved by this utility model is to propose an anti-caking flue gas scrubbing tower that can effectively prevent and eliminate caking in the Venturi jet mixer.

[0007] The anti-caking flue gas scrubbing tower of this utility model includes a tower body, an alkaline solution circulation outlet at the bottom of the tower body with an alkaline solution circulation pipe, a flue gas outlet on the side of the tower body, and a Venturi jet mixer at the top of the tower body. The inlet of the Venturi jet mixer is connected to the alkaline solution circulation pipe, the outlet of the Venturi jet mixer is connected to the inner cavity of the tower body, and the air inlet of the Venturi jet mixer is connected to the flue gas pipe. The Venturi jet mixer includes a shell and a nozzle disposed within the shell. The inlet, outlet, and air inlet of the Venturi jet mixer are respectively located at the top, bottom, and one side of the shell. A fixing ring block is fixed inside the shell. A sliding sleeve is provided between the inner wall of the fixing ring block and the outer wall of the nozzle. The sliding sleeve is slidably connected to both the outer wall of the nozzle and the inner wall of the fixing ring block. A ring rack is provided at the top of the sliding sleeve, and a hook is provided at the bottom of the sliding sleeve. The hook extends downward along the outer wall of the nozzle to the nozzle opening and then extends along the inner wall of the nozzle to form a hook shape. The hook slides against both the outer and inner walls of the nozzle. A gear that meshes with the ring rack is provided on the upper part of the fixing ring block. The gear is connected to the output end of a motor.

[0008] Preferably, a filter screen is provided inside the tower corresponding to the outlet of the Venturi jet mixer.

[0009] Preferably, the filter screen is inclined, and a slag discharge port is provided on the side wall of the tower body corresponding to the lowest point of the filter screen, and a slag discharge gate is provided on the slag discharge port.

[0010] Preferably, the alkali circulation pipe is connected to the alkali tank via an alkali replenishment pipe.

[0011] Preferably, a circulation pump is installed on the alkali circulation pipe.

[0012] Preferably, a sliding ring plate is provided inside the housing below the fixed ring block. The sliding ring plate is sleeved on the outside of the nozzle and the sliding sleeve, and the outer edge of the sliding ring plate slides against the inner wall of the housing. Sliding rods are fixed on both sides of the upper part of the sliding ring plate, and the sliding rods extend upward to slide through the fixed ring block. The upper end of the sliding rods is connected to the output end of the telescopic mechanism. The telescopic mechanism causes the sliding rods to push the sliding ring plate, which can promptly remove any clumps that may form on the inner wall of the housing.

[0013] Preferably, the telescopic mechanism is a hydraulic cylinder.

[0014] Preferably, there are several hook bars, which are connected by connecting rings.

[0015] Preferably, the inner wall of the sliding sleeve is fixedly provided with an annular protrusion around the nozzle, and the outer wall of the nozzle is provided with a sliding groove corresponding to the annular protrusion. The annular protrusion is embedded in the sliding groove and slidably connected with the sliding groove. The sliding groove and the annular protrusion ensure that the sliding sleeve rotates horizontally outside the nozzle and prevents it from moving up and down.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The alkali solution is sprayed out through the nozzle of the Venturi jet mixer. The flue gas in the flue gas duct is drawn into the shell through the air inlet. The flue gas and alkali solution are mixed in the shell and enter the tower body through the bottom outlet of the shell. The motor drives the gear to rotate, and the gear drives the ring rack to rotate, which causes the sliding sleeve to rotate and move the hook bar against the nozzle wall, scraping off the clumps formed on the outer wall of the nozzle and near the nozzle orifice, ensuring the smooth operation of the nozzle and preventing clogging. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the anti-caking flue gas scrubbing tower structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the Venturi jet mixer of this utility model;

[0020] Figure 3 yes Figure 2 Enlarged schematic diagram of the middle ring rack section.

[0021] In the diagram: 1. Tower body; 2. Alkali circulation pipe; 3. Venturi jet mixer; 4. Flue gas duct; 5. Shell; 6. Nozzle; 7. Fixed ring block; 8. Sliding sleeve; 9. Annular rack; 10. Hook bar; 11. Gear; 12. Motor; 13. Filter screen; 14. Ash discharge port; 15. Alkali tank; 16. Circulation pump; 17. Sliding ring plate; 18. Sliding rod; 19. Connecting ring; 20. Annular convex bar; 21. Sliding groove; 22. Alkali replenishment pipe; 23. Flue gas outlet. Detailed Implementation

[0022] The present invention will now be described clearly and completely with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1 As shown, the anti-caking flue gas scrubbing tower includes a tower body 1, an alkali circulation outlet at the bottom of the tower body 1, an alkali circulation pipe 2 on the alkali circulation outlet, a flue gas outlet 23 on the side of the tower body 1, and a Venturi jet mixer 3 at the top of the tower body 1. The inlet of the Venturi jet mixer 3 is connected to the alkali circulation pipe 2, the outlet of the Venturi jet mixer 3 is connected to the inner cavity of the tower body 1, and the suction port of the Venturi jet mixer 3 is connected to the flue gas pipe 4. Figure 2As shown, the Venturi jet mixer 3 includes a housing 5 and a nozzle 6 disposed within the housing 5. The inlet, outlet, and suction port of the Venturi jet mixer 3 are respectively located at the top, bottom, and one side of the housing 5. A fixing ring block 7 is fixed inside the housing 5. A sliding sleeve 8 is provided between the inner wall of the fixing ring block 7 and the outer wall of the nozzle 6. The sliding sleeve 8 is slidably connected to both the outer wall of the nozzle 6 and the inner wall of the fixing ring block 7. A ring rack 9 is provided at the top of the sliding sleeve 8, and a hook 10 is provided at the bottom of the sliding sleeve 8. The hook 10 extends downward along the outer wall of the nozzle 6 to the nozzle 6 opening and then extends along the inner wall of the nozzle 6 to form a hook shape. The hook 10 is slidably attached to both the outer and inner walls of the nozzle 6. A gear 11 is provided on the upper part of the fixing ring block 7, which meshes with the ring rack 9. The gear 11 is connected to the output end of the motor 12.

[0025] A filter screen 13 is provided inside the tower body 1 corresponding to the outlet of the Venturi jet mixer 3.

[0026] The filter screen 13 is inclined, and the side wall of the tower body 1 is provided with a slag discharge port 14 corresponding to the lowest point of the filter screen 13. The slag discharge port 14 is provided with a slag discharge door.

[0027] The alkali circulation pipe 2 is connected to the alkali tank 15 through the alkali replenishment pipe 22.

[0028] A circulation pump 16 is installed on the alkali circulation pipe 2.

[0029] Inside the housing 5, below the fixed ring block 7, there is a sliding ring plate 17. The sliding ring plate 17 is sleeved on the outside of the nozzle 6 and the sliding sleeve 8. The outer edge of the sliding ring plate 17 slides against the inner wall of the housing 5. Sliding rods 18 are fixed on both sides of the upper part of the sliding ring plate 17. The sliding rods 18 extend upward to slide through the fixed ring block 7. The upper end of the sliding rods 18 is connected to the output end of the telescopic mechanism. The telescopic mechanism is a hydraulic cylinder.

[0030] Several hook bars 10 are provided, and the hook bars 10 are connected to each other by connecting rings 19 to ensure the sturdiness of the hook bars 10.

[0031] The work process is as follows:

[0032] The alkali solution is sprayed out through the nozzle 6 of the Venturi jet mixer 3. The flue gas in the flue gas duct 4 is drawn into the shell 5 through the intake port. The flue gas and alkali solution mix in the shell 5 and enter the tower body 1 through the bottom outlet of the shell 5, and then are discharged from the flue gas outlet 23. The motor 12 drives the gear 11 to rotate, and the gear 11 drives the ring rack 9 to rotate, which causes the sliding sleeve 8 to rotate and drive the hook bar 10 to move against the wall of the nozzle 6, scraping off the clumps formed on the outer wall of the nozzle 6 and near the nozzle opening, ensuring the smooth operation of the nozzle 6 and preventing clogging.

[0033] After running for a period of time, the machine can be stopped, and then the hydraulic cylinder can be started to push the slide bar 18 down and the sliding ring plate 17 can be moved downward to scrape off the clumps on the inner wall of the housing 5.

[0034] After being filtered through filter screen 13, the alkali solution enters the alkali solution circulation pipe 2. Under the action of circulation pump 16, it re-enters the tower body 1 through Venturi jet mixer 3 to absorb and wash the flue gas. When the alkali concentration in the alkali solution is insufficient, waste alkali solution can be discharged, and then fresh alkali solution can be replenished through alkali solution tank 15 and alkali solution replenishment pipe 22.

[0035] The clumps fall onto the filter screen 13, preventing them from re-entering the alkali circulation pipe 2. When the alkali falls, it washes over the filter screen 13. The filter screen 13 is tilted, which helps the filter residue and clumps to accumulate near the slag discharge port 14, and then clean them through the slag discharge door.

[0036] Example 2

[0037] Based on Example 1, such as Figure 3 As shown, an annular protrusion 20 is fixedly provided on the inner wall of the sliding sleeve 8 around the nozzle 6, and a sliding groove 21 corresponding to the annular protrusion 20 is provided on the outer wall of the nozzle 6. The annular protrusion 20 is embedded in the sliding groove 21 and slidably connected with the sliding groove 21. The sliding groove 21 and the annular protrusion 20 limit the horizontal rotation of the sliding sleeve 8 and prevent vertical displacement.

Claims

1. A flue gas scrubbing tower for preventing agglomeration, comprising a tower body (1), characterized in that, The tower body (1) has an alkali circulation outlet at the bottom and an alkali circulation pipe (2) on the alkali circulation outlet. The tower body (1) has a flue gas outlet (23) on the side and a Venturi jet mixer (3) at the top. The inlet of the Venturi jet mixer (3) is connected to the alkali circulation pipe (2), and the outlet of the Venturi jet mixer (3) is connected to the inner cavity of the tower body (1). The suction port of the Venturi jet mixer (3) is connected to the flue gas pipe (4). The Venturi jet mixer (3) includes a shell (5) and a nozzle (6) located inside the shell (5). The inlet, outlet, and suction port of the Venturi jet mixer (3) are located at the top, bottom, and one side of the shell (5), respectively. A fixed ring block (7) is fixed inside the housing (5). A sliding sleeve (8) is provided between the inner wall of the fixed ring block (7) and the outer wall of the nozzle (6). The sliding sleeve (8) is slidably connected to both the outer wall of the nozzle (6) and the inner wall of the fixed ring block (7). A ring rack (9) is provided at the top of the sliding sleeve (8). A hook bar (10) is provided at the bottom of the sliding sleeve (8). The hook bar (10) extends downward along the outer wall of the nozzle (6) to the nozzle (6) opening and then extends along the inner wall of the nozzle (6) to form a hook shape. The hook bar (10) is slidably attached to both the outer wall and the inner wall of the nozzle (6). A gear (11) is provided on the upper part of the fixed ring block (7) to mesh with the ring rack (9). The gear (11) is connected to the output end of the motor (12).

2. The anti-caking flue gas scrubbing tower according to claim 1, characterized in that, A filter screen (13) is provided inside the tower body (1) corresponding to the outlet of the Venturi jet mixer (3).

3. The anti-caking flue gas scrubbing tower according to claim 2, characterized in that, The filter screen (13) is inclined, and the side wall of the tower body (1) is provided with a slag discharge port (14) at the lowest point of the filter screen (13), and a slag discharge gate is provided on the slag discharge port (14).

4. The anti-caking flue gas scrubbing tower according to claim 1, characterized in that, The alkali circulation pipe (2) is connected to the alkali tank (15) through the alkali replenishment pipe (22).

5. The anti-caking flue gas scrubbing tower according to claim 1, characterized in that, A circulation pump (16) is installed on the alkali circulation pipe (2).

6. The anti-caking flue gas scrubbing tower according to claim 1, characterized in that, Inside the housing (5), below the fixed ring block (7), there is a sliding ring plate (17). The sliding ring plate (17) is sleeved on the outside of the nozzle (6) and the sliding sleeve (8). The outer edge of the sliding ring plate (17) slides against the inner wall of the housing (5). Slide rods (18) are fixed on both sides of the upper part of the sliding ring plate (17). The slide rods (18) extend upward to slide through the fixed ring block (7). The upper end of the slide rods (18) is connected to the output end of the telescopic mechanism.

7. The anti-caking flue gas scrubbing tower according to claim 6, characterized in that, The telescopic mechanism is a hydraulic cylinder.

8. The anti-caking flue gas scrubbing tower according to claim 1, characterized in that, The hook bar (10) has several bars, and the hook bars (10) are connected by connecting rings (19).

9. The anti-caking flue gas scrubbing tower according to claim 1, characterized in that, The inner wall of the sliding sleeve (8) is fixedly provided with an annular protrusion (20) surrounding the nozzle (6), and the outer wall of the nozzle (6) is provided with a sliding groove (21) corresponding to the annular protrusion (20). The annular protrusion (20) is embedded in the sliding groove (21) and is slidably connected with the sliding groove (21).

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