A high-efficiency flue gas desulfurization integrated device for coal-fired boilers

Abstract

The utility model relates to flue gas treatment technical field especially is related to a kind of coal-fired boiler flue gas efficient desulfurization integrated device, including tower body, the inside of the tower body is provided with the desulfurization mechanism one for carrying out primary desulfurization treatment to flue gas, the inside of the tower body and located above the desulfurization mechanism one is provided with the dust removal part for carrying out dust removal to flue gas after primary desulfurization treatment, the inside of the tower body and located above the dust removal part is provided with the desulfurization mechanism two for carrying out secondary desulfurization treatment to flue gas after dust removal, the desulfurization mechanism one includes two groups of fixedly connected on the spray head of tower body, each group of spray head is connected in series by a conveying pipe, the inside of the tower body and located below spray head is provided with the adjusting piece of adjusting flue gas flow, the setting of desulfurization mechanism one can adjust the flow velocity of flue gas according to the different particle of flue gas input, to ensure that flue gas has enough residence time in the inside of tower body, improve the desulfurization effect to flue gas.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, and in particular to an integrated device for high-efficiency desulfurization of flue gas from coal-fired boilers. Background Technology

[0002] The flue gas produced by coal-fired boilers contains some harmful components and needs to be treated before it can be released into the atmosphere. Otherwise, it will pollute the atmospheric environment. Usually, the flue gas is desulfurized before it is released into the atmosphere.

[0003] When desulfurizing flue gas from coal-fired boilers, in order to ensure that the flue gas can flow smoothly through the desulfurization equipment, a suction fan is used at the top of the flue gas treatment equipment to drive the flue gas flow through the desulfurization equipment. However, the flue gas usually flows directly upward. Because the flue gas is driven upward by the suction fan, the flue gas velocity is too fast, and the flue gas does not stay in the desulfurization equipment for a sufficient time. It cannot make sufficient contact with the limestone slurry, which can easily lead to incomplete flue gas treatment and affect the flue gas treatment efficiency.

[0004] To solve the above-mentioned technical problems, this utility model provides an integrated high-efficiency desulfurization device for flue gas from coal-fired boilers, thus resolving the aforementioned technical issues. Utility Model Content

[0005] This utility model provides an integrated high-efficiency desulfurization device for flue gas from a coal-fired boiler, comprising a tower body, a desulfurization mechanism I for primary desulfurization of the flue gas is provided on the inner side of the tower body, a dust removal section for removing dust from the flue gas after primary desulfurization is provided on the inner side of the tower body and above the dust removal section, and a desulfurization mechanism II for secondary desulfurization of the flue gas after dust removal is provided on the inner side of the tower body and above the dust removal section.

[0006] The desulfurization mechanism includes two sets of spray heads fixedly connected to the tower body for spraying limestone slurry. Each set of spray heads is connected in series through a delivery pipe. An adjustment device for adjusting the flue gas flow rate is provided inside the tower body and below the spray heads.

[0007] Preferably, the adjusting component includes a baffle 1 rotatably connected to the inside of the tower body, and multiple evenly distributed baffles 2 rotatably connected to the inner side of the baffle 1. A placement groove is provided at the right end of the upper surface of the baffle 1 corresponding to the position of the baffle 2. The connecting shaft at the right end of the baffle 2 passes through the placement groove and is rotatably installed in the baffle 1 through a bearing. A gear is installed on the connecting shaft through a spline. The gear is located in the placement groove. A rack that can move back and forth is meshed above the multiple gears.

[0008] Preferably, the adjusting component further includes an electric telescopic rod located above multiple gears on the upper surface of the baffle one via multiple C-shaped support frames. The telescopic end of the electric telescopic rod is fixedly connected to the front end of the rack via a connecting piece, and the rack slides in cooperation with the C-shaped support frames.

[0009] Preferably, the second desulfurization mechanism includes a diversion component installed inside the tower body for separating flue gas from the reacted limestone slurry. The outer side of the tower body is fixedly connected to collect the reacted limestone slurry diverted by the diversion component. Inside the tower body and above the diversion component, a spray pipe is installed for spraying the limestone slurry.

[0010] Preferably, the diversion component includes a collection box fixedly connected inside the tower body. The collection box has an opening at the top, and multiple air outlets are evenly distributed on the inner wall at the bottom of the collection box. Liquid outlets are distributed on both the left and right sides of the inner wall at the bottom of the collection box. A diversion channel is fixedly connected to the inner wall at the bottom of the collection box at the position corresponding to the air outlet. An arc-shaped baffle is fixedly connected above the diversion channel. A drain pipe is fixedly connected to the lower surface of the collection box at the position corresponding to the liquid outlet.

[0011] Preferably, the end of the drain pipe away from the collection box extends to the outside of the tower body, the collection box is located below the end of the drain pipe away from the collection box, and a through hole is provided at the rear end of the collection box.

[0012] Preferably, the diversion channel is hollow, and the connection between the diversion channel and the air outlet is sealed.

[0013] In summary, this utility model has at least one of the following beneficial technical effects: 1. This utility model, through the setting of the desulfurization mechanism, can adjust the flow rate of flue gas according to the different particle sizes of the flue gas input, and perform primary desulfurization treatment on the flue gas to ensure that the flue gas has sufficient residence time inside the tower, thereby improving the desulfurization effect of the flue gas.

[0014] 2. By setting up a second desulfurization mechanism, this utility model can perform a second desulfurization treatment immediately after the flue gas undergoes dust removal following the first-stage desulfurization treatment, thereby improving the overall flue gas treatment efficiency, making the entire flue gas treatment process smoother, and ensuring a better desulfurization effect.

[0015] 3. This utility model uses a first desulfurization mechanism to make the limestone slurry contact the flue gas horizontally, and a second desulfurization mechanism to make the limestone slurry contact the flue gas vertically. This allows the limestone slurry to contact the flue gas at different angles, making it easier for the limestone slurry and flue gas to react. Furthermore, the limestone slurry in horizontal contact with the flue gas also slows down the flow of the flue gas, ensuring that the flue gas can have sufficient contact with the limestone slurry. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the desulfurization mechanism of this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the second desulfurization mechanism of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the adjustment mechanism of this utility model.

[0020] Figure 5 This is a schematic diagram of the state changes of the baffle of this utility model.

[0021] Figure 6 This is a schematic diagram of the two-state changes of the baffle of this utility model.

[0022] Figure 7 This is one of the three-dimensional structural schematic diagrams of the diversion component of this utility model.

[0023] Figure 8 This is the second three-dimensional structural schematic diagram of the diverter of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Tower body; 2. Desulfurization mechanism one; 3. Desulfurization mechanism two; 4. Dust removal section; 21. Spray head; 22. Conveying pipe; 23. Adjusting component; 31. Collection box; 32. Spray pipe; 33. Diverting component; 231. Electric telescopic rod; 232. Gear; 233. Rack; 234. Baffle one; 235. Baffle two; 236. C-shaped support frame; 331. Arc-shaped baffle; 332. Diverting channel; 333. Collection box; 334. Drain pipe. Detailed Implementation

[0025] The following is in conjunction with the appendix Figures 1-8 The present invention will be described in further detail below.

[0026] Reference Figure 1An integrated high-efficiency desulfurization device for flue gas from a coal-fired boiler includes a tower body 1. An air inlet is located on the side of the bottom of the tower body 1, and an air outlet is located at the top of the tower body 1. A primary desulfurization waste liquid outlet (not shown in the figure) is located at the bottom of the tower body 1. A desulfurization mechanism 2 for desulfurizing the flue gas is located inside the tower body 1, and above the desulfurization mechanism 2, a dust removal section 4 for removing dust from the desulfurized flue gas is located inside the tower body 1. The dust removal section 4 is an electrostatic precipitator. The working principle of the electrostatic precipitator is to use a high-voltage electric field to charge the dust particles in the flue gas, and then, under the action of the electric field force, cause the charged dust to be deposited on a dust collection plate and fall into an ash hopper by means of vibration, etc. The dust collection plate and ash hopper are existing technologies and are not specifically shown in the figure. A second desulfurization mechanism 3 for desulfurizing the dust-removed flue gas is located inside the tower body 1, above the dust removal section 4.

[0027] Reference Figure 1 and Figure 2 The desulfurization unit 2 includes two sets of spray heads 21 fixedly connected to the tower body 1 for spraying limestone slurry. Each set of spray heads 21 consists of multiple spray heads arranged in a rectangular array on the inner wall of the tower body 1. The two sets of spray heads 21 are arranged vertically. Each set of spray heads 21 is connected in series through a conveying pipe 22. The conveying pipe 22 is arranged in a rectangular array on the outside of the tower body 1. The two conveying pipes 22 are connected in series through two input pipes. An adjusting component 23 for adjusting the flue gas flow rate is provided inside the tower body 1 and below the spray heads 21.

[0028] Reference Figure 1 and Figure 3 The desulfurization mechanism 2 3 includes a diversion component 33 installed inside the tower body 1 for separating flue gas from the reacted limestone slurry. The outside of the tower body 1 is fixedly connected to collect the reacted limestone slurry diverted by the diversion component 33. Inside the tower body 1 and above the diversion component 33, a spray pipe 32 is installed for spraying the limestone slurry.

[0029] In practical use, flue gas first enters the interior of tower 1 through the air inlet at the bottom of tower 1. At the same time, limestone slurry is transported to the interior of conveying pipe 22 through the input pipe, and then transported to the positions of each spray head 21 through conveying pipe 22. The limestone slurry is sprayed into the interior of tower 1 through the spray head 21, so that the limestone slurry comes into contact with the flue gas and reacts inside tower 1. At the same time, the flow rate of flue gas inside tower 1 can be adjusted by adjusting component 23 according to the flue gas input to ensure that the flue gas has sufficient residence time inside tower 1 and can fully react with limestone slurry to carry out primary desulfurization treatment.

[0030] The flue gas, after undergoing primary desulfurization, continues to move upward. After being dusted by the dust removal unit 4, it continues to move upward. At this time, the limestone slurry is evenly sprayed downward inside the tower body 1 through the spray pipe 32. The dust-removed flue gas then moves upward through the diverter 33 and comes into countercurrent contact with the limestone slurry. The diverter 33 divides the flue gas into multiple upward streams, allowing the flue gas to fully contact the limestone slurry. This process achieves secondary desulfurization of the flue gas. The reacted limestone slurry is promptly transported to the outside of the tower body 1 through the diverter 33, preventing it from flowing downward inside the tower body 1 and polluting the untreated flue gas. The desulfurized flue gas is then output to the next process through the outlet at the top of the tower body 1.

[0031] Reference Figure 2 , Figure 4 , Figure 5 and Figure 6 The adjusting component 23 includes a baffle 234 rotatably connected to the inner side of the tower body 1. Both ends of the baffle 234 have a rotating shaft (not shown in the figure). The rotating shaft is rotatably mounted on the tower body 1 through bearings. Multiple evenly distributed baffles 235 are rotatably connected to the inner side of the baffle 234. Both ends of the baffles 235 are rotatably mounted on the baffle 234 through connecting shafts (not shown in the figure). When adjacent baffles 235 are in a horizontal state, they fit together and are in a sealed state.

[0032] Each of the upper surfaces of baffle 1 234 has a placement groove at the right end corresponding to the position of baffle 2 235. The connecting shaft at the right end of baffle 2 235 passes through the placement groove and is rotatably mounted in baffle 1 234 via a bearing. A gear 232 is mounted on the connecting shaft via a spline, and the gear 232 is located in the placement groove. A rack 233 capable of moving back and forth is meshed above the multiple gears 232.

[0033] The adjusting component 23 also includes an electric telescopic rod 231 located above multiple gears 232 on the upper surface of the baffle 234 via multiple C-shaped support frames 236. The rack 233 is slidably disposed inside the multiple C-shaped support frames 236 in the front-back direction. The number and distribution of the C-shaped support frames 236 can be reasonably selected according to the needs of use. The figure only shows one arrangement. The telescopic end of the electric telescopic rod 231 is fixedly connected to the front end of the rack 233 via a connecting piece. The rack 233 slides with the C-shaped support frame 236. A drive motor is fixedly installed on the right side of the tower body 1. The output shaft of the drive motor is fixedly connected to the rotating shaft on the right side of the baffle 234.

[0034] In practical use, when adjusting the flue gas flow rate through the adjusting component 23, the first step is to drive the first baffle 234 to rotate inside the tower body 1 via the drive motor, so that the first baffle 234 rotates from a horizontal state to an inclined state, changing the flow path of the flue gas from a straight line to a curve, thereby increasing the residence time of the flue gas inside the tower body 1. Furthermore, when the first baffle 234 is in a horizontal state, the electric telescopic rod 231 retracts, causing the rack 233 to move backward. At this time, the rack 233 drives the gear 232 to rotate on the first baffle 234, and the gear 232 simultaneously drives the second baffle 235 to rotate synchronously. At this time, multiple second baffles 235 deflect synchronously on the first baffle 234. By adjusting the deflection angle of the second baffles 235, the flow rate of the flue gas can be adjusted, thereby increasing the residence time of the flue gas inside the tower body 1 during the primary desulfurization treatment.

[0035] It should be noted that, depending on the usage requirements, the tilt angle of baffle 1 234 can be adjusted individually, at which time multiple baffles 235 are in a horizontal state. Alternatively, the tilt angle of baffle 235 can be adjusted individually, at which time baffle 1 234 is in a horizontal state. Or, the tilt angles of baffle 1 234 and baffle 235 can be adjusted simultaneously to increase the residence time of flue gas inside tower 1.

[0036] Reference Figure 3 , Figure 7 and Figure 8 The diversion component 33 includes a collection box 333 fixedly connected inside the tower body 1. The collection box 333 has an opening at the top, and multiple gas outlets are evenly distributed on the inner wall of the bottom end of the collection box 333. Liquid outlets are distributed on both the left and right sides of the inner wall of the bottom end of the collection box 333. Diversion channels 332 are fixedly connected to the inner wall of the bottom end of the collection box 333 at the positions corresponding to the gas outlets. An arc-shaped baffle 331 is fixedly connected to the top of the diversion channel 332 by a support rod. Sufficient gaps are reserved between the upper outlet of the diversion channel 332 and the arc-shaped baffle 331 to allow gas to escape from the upper outlet of the diversion channel 332. A drain pipe 334 is fixedly connected to each outlet position on the lower surface. The end of the drain pipe 334 away from the collection box 333 extends to the outside of the tower body 1. The collection box 31 is located below the end of the drain pipe 334 away from the collection box 333. A through hole is opened at the rear end of the collection box 31. The diversion channel 332 is hollow. The connection between the diversion channel 332 and the air outlet is sealed. Sufficient space is left between the front and rear ends of the diversion channel 332 and the corresponding front and rear inner sidewalls of the tower body 1 so that the limestone slurry gathered in the area between adjacent diversion channels 332 can flow from the space to the outlet.

[0037] In practical use, after the flue gas completes dust removal, it continues to flow upward through the outlet on the lower surface of the collection box 333. The flue gas enters the interior of the diversion channel 332 through the outlet and is divided into two streams by the arc-shaped baffle 331, which continue to flow upward. At the same time, the limestone slurry is sprayed into the interior of the tower body 1 through the spray pipe 32. At this time, the limestone slurry flows downward inside the tower body 1, and the flue gas flows upward inside the tower body 1. The flue gas and the limestone slurry come into full contact in countercurrent to carry out secondary desulfurization treatment.

[0038] The reacted limestone slurry falls downwards into the collection box 333 and flows out from the two outlets on the inner wall of the bottom of the collection box 333. It is then discharged to the outside of the tower body 1 through the drain pipe 334. At this time, the collection box 31 collects the reacted limestone slurry discharged from the drain pipe 334 and the reacted limestone slurry discharged from the waste liquid outlet at the rear of the tower body 1 after the first-stage desulfurization treatment, and then performs subsequent treatment.

[0039] After desulfurization, the flue gas is output to the next processing stage through the gas outlet at the top of tower 1.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An integrated high-efficiency desulfurization device for flue gas from a coal-fired boiler, comprising a tower body (1), characterized in that: The inner side of the tower body (1) is provided with a desulfurization mechanism 1 (2) for primary desulfurization treatment of flue gas, and a dust removal part (4) for dust removal of flue gas after primary desulfurization treatment is provided on the inner side of the tower body (1) and above the desulfurization mechanism 1 (2). The inner side of the tower body (1) and above the dust removal part (4) is provided with a desulfurization mechanism 2 (3) for secondary desulfurization treatment of flue gas after dust removal. The desulfurization mechanism (2) includes two sets of spray heads (21) fixedly connected to the tower body (1) for spraying limestone slurry. Each set of spray heads (21) is connected in series through a conveying pipe (22). An adjusting component (23) for adjusting the flue gas flow rate is provided inside the tower body (1) and below the spray head (21).

2. The integrated high-efficiency desulfurization device for flue gas from a coal-fired boiler according to claim 1, characterized in that: The adjusting component (23) includes a baffle (234) rotatably connected to the inner side of the tower body (1). Multiple baffles (235) are rotatably connected to the inner side of the baffle (234). Placement slots are provided at the right end of the upper surface of the baffle (234) corresponding to the position of the baffle (235). The connecting shaft at the right end of the baffle (235) passes through the placement slot and is rotatably installed in the baffle (234) through the bearing. A gear (232) is installed on the connecting shaft through a spline. The gear (232) is located in the placement slot. A rack (233) that can move back and forth is meshed above the multiple gears (232).

3. The integrated high-efficiency desulfurization device for flue gas from a coal-fired boiler according to claim 2, characterized in that: The adjusting component (23) also includes an electric telescopic rod (231) located above multiple gears (232) on the upper surface of the baffle (234) by multiple C-shaped support frames (236). The telescopic end of the electric telescopic rod (231) is fixedly connected to the front end of the rack (233) through a connecting piece, and the rack (233) slides with the C-shaped support frame (236).

4. The integrated high-efficiency desulfurization device for flue gas from a coal-fired boiler according to claim 1, characterized in that: The second desulfurization unit (3) includes a diversion component (33) installed inside the tower body (1) for separating flue gas from the limestone slurry after reaction. The outer side of the tower body (1) is fixedly connected to collect the limestone slurry after reaction diverted by the diversion component (33). A spray pipe (32) for spraying limestone slurry is installed inside the tower body (1) and above the diversion component (33).

5. The integrated high-efficiency desulfurization device for flue gas from a coal-fired boiler according to claim 4, characterized in that: The diversion component (33) includes a collection box (333) fixedly connected inside the tower body (1). The collection box (333) is open at the top. Multiple air outlets are evenly opened on the inner wall of the bottom end of the collection box (333). Liquid outlets are opened on both the left and right sides of the inner wall of the bottom end of the collection box (333). A diversion channel (332) is fixedly connected to the inner wall of the bottom end of the collection box (333) at the position corresponding to the air outlet. An arc-shaped baffle (331) is fixedly connected above the diversion channel (332). A drain pipe (334) is fixedly connected to the lower surface of the collection box (333) at the position corresponding to the liquid outlet.

6. The integrated high-efficiency desulfurization device for flue gas from a coal-fired boiler according to claim 5, characterized in that: The end of the drain pipe (334) away from the collection box (333) extends to the outside of the tower body (1). The collection box (31) is located below the end of the drain pipe (334) away from the collection box (333). A through hole is provided at the rear end of the collection box (31).

7. The integrated high-efficiency desulfurization device for flue gas from a coal-fired boiler according to claim 5, characterized in that: The diversion channel (332) is hollow, and the connection between the diversion channel (332) and the air outlet is sealed.

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