A cement kiln waste gas desulfurization device

Abstract

The present invention discloses a cement kiln waste gas desulfurization device, including a gas collecting tank, the gas collecting tank is connected to a shell through an air pipe, a stirring device is arranged inside the second chamber, a plurality of sprayers are arranged at the bottom end of the second chamber, a water pipe is arranged at the top end of the shell and the water pipe is connected to the second chamber, a material storage box is arranged at the top end of the left side of the shell and the material storage box is connected to the second chamber, a slurry discharge pipe is arranged at the bottom end of the right side of the shell and the slurry discharge pipe is connected to the first chamber, a pH sensor is arranged inside the first chamber, a first motor is arranged inside the material storage box, an impeller is arranged at the output end of the first motor, a second motor is arranged inside the fixed frame, and a cleaning arm, a ash guide plate and a cleaning rod are arranged at the output end of the second motor from bottom to top, and the cleaning rod is in contact with the bottom end of the filter. In the present invention, pipeline blockage can be avoided and the concentration of calcium hydroxide solution can be kept appropriate, which is worthy of vigorous promotion.

Description

Technical Field

[0001] The invention relates to the field of desulfurization equipment, and in particular to a cement kiln waste gas desulfurization device. Background Art

[0002] A cement kiln is a device used to calcine cement clinker. Cement is generally calcined using coal. When coal burns, sulfides are produced. These sulfides can pollute the environment and require desulfurization treatment.

[0003] Dust is generated during coal combustion, which will clog the pipeline and affect the working efficiency of the equipment. In addition, desulfurization generally uses calcium hydroxide solution to react with sulfide. The concentration of calcium hydroxide solution will become lower during the reaction, which reduces the efficiency of the desulfurization operation. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a cement kiln waste gas desulfurization device.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a cement kiln waste gas desulfurization device, including a gas collecting tank, a gas collecting hood is arranged at the bottom of the gas collecting tank, a filter is arranged in the middle of the gas collecting tank, a fixing frame is arranged below the filter and the fixing frame is fixedly connected to the gas collecting tank, the gas collecting tank is connected to a shell through an air pipe, a first chamber and a second chamber are arranged inside the shell, a stirring device is arranged inside the second chamber, a plurality of sprayers are arranged at the bottom of the second chamber, a water pipe is arranged at the top of the shell and the water pipe is connected to the second chamber, and the left top of the shell A storage box is provided at the end and the storage box is connected with the second chamber, a slurry discharge pipe is provided at the bottom end of the right side of the shell and the slurry discharge pipe is connected with the first chamber, a PH sensor is provided inside the first chamber, a first motor is provided inside the storage box, an impeller is provided at the output end of the first motor, an electronic scale is provided at the bottom end of the storage box and the electronic scale is fixedly connected to the left side of the shell, a second motor is provided on the inner side of the fixed frame, a cleaning arm, an ash guide plate and a cleaning rod are provided at the output end of the second motor from bottom to top in sequence, and the cleaning rod is in contact with the bottom end of the filter screen, and the bottom end of the cleaning arm is in contact with the fixed frame.

[0006] As a further description of the above technical solution:

[0007] The first motor is electrically connected to the electronic scale and the pH sensor.

[0008] As a further description of the above technical solution:

[0009] The ash guide plate is conical.

[0010] As a further description of the above technical solution:

[0011] The fixing frame and the inner wall of the gas collecting tank form an ash collecting trough, and an ash discharge port is arranged at the right end of the gas collecting tank.

[0012] As a further description of the above technical solution:

[0013] A valve is arranged on the right side of the trachea.

[0014] As a further description of the above technical solution:

[0015] A water pump is arranged on the water pipe.

[0016] As a further description of the above technical solution:

[0017] A mud pump is arranged on the slurry discharge pipe.

[0018] The present invention has the following beneficial effects:

[0019] 1. In the present invention, a filter screen is firstly provided to block the dust under the gas collecting tank, and then the second motor rotates to drive the cleaning rod and the cleaning arm to sweep the dust down through the ash guide plate and fall into the ash collecting trough, and the dust is sent out of the gas collecting tank from the ash discharge port through the cleaning arm, so as to keep the gas collecting tank clean and avoid the pipeline from being blocked.

[0020] 2. In the present invention, the pH sensor detects the pH value in the first chamber. When the pH value is lower than a certain value, the speed of the first motor increases to speed up the delivery of calcium hydroxide powder into the second chamber, thereby increasing the pH value in the second chamber, and then delivering the calcium hydroxide powder to the first chamber through the sprayer, thereby ensuring that the concentration of the calcium hydroxide solution in the first chamber is within an appropriate range. This method is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of a cement kiln waste gas desulfurization device proposed by the present invention;

[0022] Figure 2 A schematic diagram of a material storage box of a cement kiln exhaust gas desulfurization device proposed by the present invention;

[0023] Figure 3 The present invention is a schematic diagram of an ash guide plate of a cement kiln exhaust gas desulfurization device.

[0024] Legend:

[0025] 1. Gas collecting tank; 2. Filter; 3. Fixed frame; 4. Gas collecting hood; 5. Air pipe; 6. Shell; 7. First chamber; 8. Second chamber; 9. Stirring device; 10. Water pipe; 11. Sprayer; 12. Storage box; 13. Slurry discharge pipe; 14. First motor; 15. Impeller; 16. Electronic scale; 17. PH sensor; 18. Second motor; 19. Ash cleaning arm; 20. Ash guide plate; 21. Ash cleaning rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Reference Figure 1-3, an embodiment of the present invention: a cement kiln waste gas desulfurization device, comprising a gas collecting tank 1, a gas collecting hood 4 is arranged at the bottom of the gas collecting tank 1, a filter screen 2 is arranged in the middle of the gas collecting tank 1, a fixing frame 3 is arranged below the filter screen 2 and the fixing frame 3 is fixedly connected to the gas collecting tank 1, the gas collecting tank 1 is connected to a shell 6 through an air pipe 5, a first chamber 7 and a second chamber 8 are arranged inside the shell 6, a stirring device 9 is arranged inside the second chamber 8, a plurality of sprayers 11 are arranged at the bottom of the second chamber 8, a water pipe 10 is arranged at the top of the shell 6 and the water pipe 10 is connected to the second chamber 8, a material storage box 12 is arranged at the top left of the shell 6 and the material storage box 12 is connected to the The second chamber 8 is connected, a slurry discharge pipe 13 is provided at the bottom right side of the shell 6 and the slurry discharge pipe 13 is connected to the first chamber 7, a PH sensor 17 is provided inside the first chamber 7, a first motor 14 is provided inside the storage box 12, an impeller 15 is provided at the output end of the first motor 14, an electronic scale 16 is provided at the bottom end of the storage box 12 and the electronic scale 16 is fixedly connected to the left side of the shell 6, a second motor 18 is provided inside the fixing frame 3, and a cleaning arm 19, an ash guide plate 20 and a cleaning rod 21 are provided at the output end of the second motor 18 from bottom to top, and the cleaning rod 21 is in contact with the bottom end of the filter screen 2, and the bottom end of the cleaning arm 19 is in contact with the fixing frame 3. In the structure, the exhaust gas enters the gas collecting tank 1 through the gas collecting hood 4, the dust is intercepted by the filter 2, and the dust at the bottom of the gas collecting tank 1 is cleaned under the action of the second motor 18, the dust cleaning arm 19 and the dust cleaning rod 21. Part of the dust falls directly to the top of the fixed frame 3, and part of the dust falls to the top of the fixed frame 3 under the action of the dust guide plate 20. Then the exhaust gas enters the first chamber 7 through the air pipe 5 and moves upward through the calcium hydroxide solution in the first chamber 7. Clean water is sent into the second chamber 8 through the water pipe 10. The first motor 14 drives the impeller 15 to send the calcium hydroxide powder into the second chamber 8. The stirring device 9 accelerates the calcium hydroxide to blend into the clean water. The calcium hydroxide solution is formed and fed into the first chamber 7 by the sprayer 11. During the process of feeding the calcium hydroxide solution into the first chamber 7, the mist-like calcium hydroxide solution contacts the rising exhaust gas and reacts the unreacted sulfur oxides completely. When the pH sensor 17 detects that the pH value of the solution in the first chamber 7 is lower than a certain value, the first motor 14 accelerates to increase the amount of calcium hydroxide powder fed into the second chamber 8, thereby increasing the amount of calcium hydroxide in the vertical first chamber 7, maintaining the concentration of the calcium hydroxide solution in the first chamber 7 within an appropriate range, and the slurry discharge pipe 13 discharges the emulsion in the first chamber 7 regularly.

[0029] The first motor 14 is electrically connected to the electronic scale 16 and the PH sensor 17. The electronic scale 16 determines the mass of the calcium hydroxide powder added to the second chamber 8 by the change in the mass of the storage box 12 before and after, and sends a signal to the first motor 14 to make the amount of calcium hydroxide powder added appropriate. The PH sensor 17 detects the signal and sends a signal to the first motor 14. The ash guide plate 20 is conical in shape to facilitate ash falling. The fixed frame 3 and the inner wall of the gas collecting tank 1 form an ash collecting trough and the right end of the gas collecting tank 1 is provided with an ash discharge port for collecting and cleaning dust. A valve is provided on the right side of the air pipe 5, a water pump is provided on the water pipe 10, and a mud pump is provided on the slurry discharge pipe 13.

[0030] Working principle: the exhaust gas enters the gas collecting tank 1 through the gas collecting hood 4, the dust is intercepted by the filter 2, and the dust at the bottom of the gas collecting tank 1 is cleaned under the action of the second motor 18, the cleaning arm 19 and the cleaning rod 21. Part of the dust falls directly into the ash collecting tank, and part of the dust falls to the top of the ash collecting tank under the action of the ash guide plate 20. Then the exhaust gas enters the first chamber 7 through the air pipe 5 and moves upward through the calcium hydroxide solution in the first chamber 7. Clean water is sent into the second chamber 8 through the water pipe 10. The first motor 14 drives the impeller 15 to send the calcium hydroxide powder into the second chamber 8. Under the action of the stirring device 9, the calcium hydroxide is accelerated to dissolve into the clean water to generate hydrogen. The calcium oxide solution and the calcium hydroxide solution are sent into the first chamber 7 by the sprayer 11. In the process of sending the calcium hydroxide solution into the first chamber 7, the mist calcium hydroxide solution contacts the rising exhaust gas and reacts the unreacted sulfur oxides completely. When the pH sensor 17 detects that the pH value of the solution in the first chamber 7 is lower than a certain value, the first motor 14 accelerates to increase the amount of calcium hydroxide powder sent into the second chamber 8, thereby increasing the amount of calcium hydroxide in the vertical first chamber 7, maintaining the concentration of the calcium hydroxide solution in the first chamber 7 within an appropriate range, and the slurry discharge pipe 13 regularly discharges the emulsion in the first chamber 7.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cement kiln waste gas desulfurization device, comprising a gas collecting tank (1), characterized in that: The gas collecting tank (1) is provided with a gas collecting hood (4) at the bottom end, a filter screen (2) is provided in the middle of the gas collecting tank (1), a fixing frame (3) is provided below the filter screen (2) and the fixing frame (3) is fixedly connected to the gas collecting tank (1), the gas collecting tank (1) is connected to a shell (6) via an air pipe (5), a first chamber (7) and a second chamber (8) are provided inside the shell (6), a stirring device (9) is provided inside the second chamber (8), a plurality of sprayers (11) are provided at the bottom end of the second chamber (8), a water pipe (10) is provided at the top end of the shell (6) and the water pipe (10) is connected to the second chamber (8), a material storage box (12) is provided at the top end of the left side of the shell (6) and the material storage box (12) is connected to the second chamber (8), a slurry discharge pipe (13) is provided at the bottom end of the right side of the shell (6) and the slurry discharge pipe (13) is connected to the first chamber (7), and the first chamber (7) ) is provided with a pH sensor (17) inside, a first motor (14) is provided inside the material storage box (12), an impeller (15) is provided at the output end of the first motor (14), an electronic scale (16) is provided at the bottom end of the material storage box (12), and the electronic scale (16) is fixedly connected to the left side of the housing (6), a second motor (18) is provided inside the fixing frame (3), an ash cleaning arm (19), an ash guide plate (20) and an ash cleaning rod (21) are provided at the output end of the second motor (18) from bottom to top, and the ash cleaning rod (21) is in contact with the bottom end of the filter screen (2), the bottom end of the ash cleaning arm (19) is in contact with the fixing frame (3), the first motor (14) is electrically connected to the electronic scale (16) and the pH sensor (17), the ash guide plate (20) is conical, the fixing frame (3) and the inner wall of the gas collecting tank (1) form an ash collecting trough, and an ash discharge port is provided at the right end of the gas collecting tank (1).

2. A cement kiln waste gas desulfurization device according to claim 1, characterized in that: A valve is provided on the right side of the air pipe (5).

3. A cement kiln waste gas desulfurization device according to claim 1, characterized in that: The water pipe (10) is provided with a water pump.

4. A cement kiln waste gas desulfurization device according to claim 1, characterized in that: The slurry discharge pipe (13) is provided with a slurry pump.

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