Flue gas water-sealed tank

Abstract

The utility model discloses a flue gas water-sealed tank which comprises a water-sealed tank body, a flue gas inlet pipe is arranged at the top of the water-sealed tank body, a flue gas outlet pipe is obliquely arranged at the top end of the side wall of the water-sealed tank body, a spiral cooling pipe is arranged in the flue gas outlet pipe, and the two ends of the spiral cooling pipe extend to the outer side of the flue gas outlet pipe and are provided with cooling medium conveying pipes. A spiral heat exchange pipe is spirally wound on the outer side wall of the flue gas inlet pipe, the spiral heat exchange pipe extends to the outer side of the water seal tank body and is provided with a heat exchange medium conveying pipe, a flow guide pipe is arranged at the bottom end of the water seal tank body, a discharge pipe is arranged at the bottom end of the flow guide pipe, a discharge control structure is arranged in the discharge pipe, and a supporting frame is arranged at the bottom end in the water seal tank body. According to the flue gas waste heat utilization device, the flue gas waste heat utilization effect can be improved, the water content during flue gas discharging can be reduced, and meanwhile, automatic cleaning and discharging of generated slurry impurities can be conveniently achieved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas water seal tank technology, and more specifically, it relates to a flue gas water seal tank. Background Technology

[0002] Flue gas water seal tanks can treat flue gas through a water seal device. When flue gas passes through the water seal tank, the water seal device can capture particulate matter, dust and some soluble pollutants in the flue gas, achieving preliminary purification. If the flue gas contains acidic gases (such as SO2, HCl, etc.), the water in the water seal tank can partially absorb these gases and play a neutralizing role.

[0003] Flue gas contains a large amount of heat. Existing flue gas water seal tanks mainly focus on cooling and purification when treating flue gas, failing to fully recover and utilize the waste heat in the flue gas. This results in a large amount of heat energy being directly lost or discharged through cooling water, causing energy waste.

[0004] Furthermore, when the high-temperature flue gas comes into contact with the water inside the water seal tank, the water inside the water seal tank evaporates quickly, resulting in a high water content in the discharged flue gas. This leads to rapid changes in the water seal level inside the water seal tank and affects the treatment effect of the flue gas in the next treatment process. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a flue gas water seal tank to solve the technical problems mentioned in the background art, such as the poor utilization effect of waste heat in flue gas and the high water content in the emitted flue gas.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A flue gas water seal tank includes a water seal tank body. A flue gas inlet pipe is provided at the top of the water seal tank body, and a flue gas outlet pipe is inclinedly provided at the top of the side wall of the water seal tank body. A spiral cooling pipe is provided inside the flue gas outlet pipe. Cooling medium conveying pipes are provided at both ends of the spiral cooling pipes extending to the outside of the flue gas outlet pipes. A spiral heat exchange pipe is spirally wound on the outer wall of the flue gas inlet pipe. A heat exchange medium conveying pipe is provided at the outside of the spiral heat exchange pipes extending to the outside of the water seal tank body. A guide pipe is provided at the bottom of the water seal tank body, and an exhaust pipe is provided at the bottom of the guide pipe. An exhaust control structure is provided inside the exhaust pipe. A support frame is provided at the bottom of the interior of the water seal tank body, and a guide and protection frame is provided at the top of the inclined downward-facing support frame.

[0010] The present invention is further configured such that a guide shroud is provided at the bottom end of the guide pipe and the water seal tank, and an opening and closing valve is provided on the guide pipe. The guide shroud can better collect sludge and impurities formed by dust particles and other particles intercepted by contact with flue gas in the water seal tank, and guide them to the discharge pipe for discharge through the guide pipe.

[0011] The present invention is further configured such that the emission control structure includes a spiral discharge shaft, which is rotatably mounted inside the emission pipe via bearings and extends outward to be connected to a motor. When the motor is started, the spiral discharge shaft can be rotated. The rotation of the spiral discharge shaft can discharge the dust and impurities that have fallen into the emission pipe. Moreover, the use of a spiral discharge shaft for discharge control provides greater stability, allowing the sludge and impurities accumulated in the water seal tank to descend steadily downward through the guide pipe and be discharged into the emission pipe.

[0012] The present invention is further configured such that an upper level gauge and a lower level gauge are provided inside the water seal tank. The upper level gauge is located below the end of the flue gas outlet pipe connected to the water seal tank and above the bottom of the flue gas inlet pipe. A liquid level fluctuation range is formed between the upper level gauge and the lower level gauge. The upper level gauge is used to detect whether the water has reached the top of the liquid level fluctuation range. When it reaches the top, the water inlet pipe stops water intake. The lower level gauge is used to detect whether the water has reached the bottom of the liquid level fluctuation range. When it reaches the bottom, the water inlet pipe starts water intake to replenish the water seal tank.

[0013] The present invention is further configured such that a water inlet pipe is provided on the water seal tank, and a water inlet valve is provided on the water inlet pipe. The water inlet pipe is used to replenish and supply liquid to the water seal tank, and the water inlet valve is used to control the opening and closing of the water inlet pipe.

[0014] The present invention is further configured such that a first overflow pipe is provided on the water seal tank, and a water seal box is connected to the tail end of the first overflow pipe. The first overflow pipe extends into the interior of the water seal box, and a second overflow pipe is provided at the top of the water tank. When the upper level gauge malfunctions, the water can overflow through the first overflow pipe to prevent the water in the water seal box from entering the flue gas outlet pipe. The water seal box is used to water seal the first overflow pipe.

[0015] The present invention is further configured such that a water supply pipe and a drain pipe are provided on the water seal tank, and a control valve is provided on both the water supply pipe and the drain pipe. Water is introduced into the water seal tank through the water supply pipe to achieve the sealing of the first overflow pipe.

[0016] The present invention is further configured such that a spray pipe is provided at the top of the interior of the water seal tank, and an inlet pipe is provided on the outside of the water seal tank extending from the spray pipe. A valve is provided on the inlet pipe. The external reaction solution can be transported to the spray pipe through the inlet pipe and sprayed evenly into the water seal tank through the spray pipe, so that it can come into contact with the flue gas passing through the water seal tank and react to achieve the purification of the flue gas.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a flue gas water seal tank, which has the following beneficial effects:

[0019] 1. This utility model includes a water-sealed tank. A flue gas inlet pipe is provided at the top of the water-sealed tank, and a flue gas outlet pipe is inclinedly provided at the top of the side wall of the water-sealed tank. A spiral cooling pipe is provided inside the flue gas outlet pipe. Cooling medium conveying pipes are provided at both ends of the spiral cooling pipe to the outside of the flue gas outlet pipe. When the flue gas is discharged through the flue gas outlet pipe, the cooling medium can be conveyed to the spiral cooling pipe through the cooling medium conveying pipe and flow in the spiral cooling pipe, thereby cooling the discharged flue gas and causing the water vapor carried in the flue gas to condense. The condensate can then flow back into the water-sealed tank along the spiral cooling pipe and the flue gas outlet pipe. This reduces the loss of water in the water tank and dries the discharged flue gas, making it easier for the flue gas to enter the next processing step.

[0020] 2. This utility model has a spiral heat exchange tube spirally wound on the outer wall of the flue gas inlet pipe. The spiral heat exchange tube extends to the outer side of the water seal tank and is provided with a heat exchange medium conveying pipe. When the flue gas is transported to the water seal tank through the flue gas inlet pipe, the heat exchange medium used for heat exchange is transported to the spiral heat exchange tube through the heat exchange medium conveying pipe and flows in the spiral heat exchange tube to achieve the cooling of the flue gas and the heating of the heat exchange medium at the same time. In this way, the utilization effect of preheating in the flue gas can be improved.

[0021] 3. This utility model has a guide pipe at the bottom of the water seal tank, and a discharge pipe at the bottom of the guide pipe. A discharge control structure is installed inside the discharge pipe. The discharge control structure includes a spiral discharge shaft, which is rotatably installed inside the discharge pipe via bearings and extends outward to be connected to a motor. When the motor is started, the spiral discharge shaft can be rotated. The rotation of the spiral discharge shaft can discharge the dust and impurities that have fallen into the discharge pipe. The use of a spiral discharge shaft for discharge control provides stability, allowing the sludge and impurities accumulated in the water seal tank to descend steadily through the guide pipe and be discharged into the discharge pipe.

[0022] 4. This utility model has a support frame at the bottom of the water seal tank, and a flow guide and protection frame at the top of the downward-sloping support frame. When dust particles in the flue gas come into contact with the water in the water seal tank, they will be intercepted and settled at the bottom of the water seal tank. By setting up the support frame and the flow guide and protection frame, the flue gas entering the liquid inside the water seal tank can be prevented from directly impacting the bottom of the water seal tank and disturbing the settled sludge. In this way, the sludge generated by the contact between the flue gas and the water can be stably settled at the bottom of the water seal tank, which facilitates the subsequent stable discharge. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a flue gas water seal tank according to the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the overall structure of a flue gas water seal tank according to the present invention. Figure 2 ;

[0025] Figure 3 This is a cross-sectional schematic diagram of the internal structure of the water seal tank in this utility model;

[0026] Figure 4 This is a cross-sectional view of the spiral cooling pipe inside the flue gas outlet pipe in this utility model.

[0027] Figure 5 This is a cross-sectional view of the internal structure of the discharge pipe in this utility model.

[0028] In the diagram: 1. Water seal tank; 2. Flue gas inlet pipe; 3. Flue gas outlet pipe; 4. Spiral cooling pipe; 5. Cooling medium conveying pipe; 6. Spiral heat exchanger pipe; 7. Heat exchanger conveying pipe; 8. Guide pipe; 9. Discharge pipe; 10. Support frame; 11. Guide protection frame; 12. Guide hood; 13. On / off valve; 14. Spiral discharge shaft; 15. Motor; 16. Upper level gauge; 17. Lower level gauge; 18. Water inlet pipe; 19. Water inlet valve; 20. First overflow pipe; 21. Water seal tank; 22. Second overflow pipe; 23. Water supply pipe; 24. Drain pipe; 25. Control valve; 26. Spray pipe; 27. Liquid inlet pipe; 28. Valve. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0032] Please see Figures 1-5 A flue gas water seal tank includes a water seal tank body 1, a flue gas inlet pipe 2 at the top of the water seal tank body 1, a flue gas outlet pipe 3 inclined at the top of the side wall of the water seal tank body 1, a spiral cooling pipe 4 inside the flue gas outlet pipe 3, cooling medium conveying pipes 5 extending from both ends of the spiral cooling pipe 4 to the outside of the flue gas outlet pipe 3, a spiral heat exchange pipe 6 spirally wound on the outer wall of the flue gas inlet pipe 2, a heat exchange medium conveying pipe 7 extending from the spiral heat exchange pipe 6 to the outside of the water seal tank body 1, a guide pipe 8 at the bottom of the water seal tank body 1, an outlet pipe 9 at the bottom of the guide pipe 8, an outlet control structure inside the outlet pipe 9, a support frame 10 at the bottom inside the water seal tank body 1, and a guide and protection frame 11 at the top of the downward inclined support frame 10.

[0033] Please see Figures 1-5 As one implementation of the guide pipe 8: a guide shroud 12 is provided at the bottom of the guide pipe 8 and the water seal tank 1, and an opening and closing valve 13 is provided on the guide pipe 8. The guide shroud 12 can better collect the sludge and impurities formed by dust particles and other particles intercepted by contact with flue gas in the water seal tank 1, and guide them to the discharge pipe 9 through the guide pipe 8 for discharge.

[0034] Please see Figures 1-5 As one implementation of the emission control structure: the emission control structure includes a spiral discharge shaft 14, which is rotatably installed in the discharge pipe 9 via bearings and extends outward to be connected to a motor 15. When the motor 15 is started, the spiral discharge shaft 14 can be rotated. The rotation of the spiral discharge shaft 14 can discharge the dust and impurities that have fallen into the discharge pipe 9. Moreover, the use of the spiral discharge shaft 14 for discharge control provides greater stability, allowing the sludge and impurities accumulated in the water seal tank 1 to stably descend downward through the guide pipe 8 and be discharged into the discharge pipe 9.

[0035] Please see Figures 1-5As one embodiment of the water seal tank 1: The water seal tank 1 is equipped with an upper level gauge 16 and a lower level gauge 17. The upper level gauge 16 is located below the end of the flue gas outlet pipe 3 that connects to the water seal tank 1, and above the bottom of the flue gas inlet pipe 2. A liquid level fluctuation range is formed between the upper level gauge 16 and the lower level gauge 17. The upper level gauge 16 is used to detect whether the water has reached the top of the liquid level fluctuation range. When it reaches the top, the water inlet pipe 18 stops the water inlet. The lower level gauge 17 is used to detect whether the water has reached the bottom of the liquid level fluctuation range. When it reaches the bottom, the water inlet pipe 18 starts to inlet water to replenish the water seal tank 1.

[0036] Please see Figures 1-5 As one embodiment of the water seal tank 1: the water seal tank 1 is provided with a water inlet pipe 18, and a water inlet valve 19 is provided on the water inlet pipe 18. The water inlet pipe 18 is used to replenish the liquid in the water seal tank 1, and the water inlet valve 19 is used to control the opening and closing of the water inlet pipe 18.

[0037] Please see Figures 1-5 As one embodiment of the water seal tank 1: the water seal tank 1 is provided with a first overflow pipe 20, the tail end of the first overflow pipe 20 is connected to a water seal box 21, the first overflow pipe 20 extends into the water seal box 21, and a second overflow pipe 22 is provided at the top of the water box. When the upper level gauge 16 malfunctions, it can overflow through the first overflow pipe 20 to prevent the water in the water seal box 21 from entering the flue gas outlet pipe 3. The water seal box 21 is used to water seal the first overflow pipe 20.

[0038] Please see Figures 1-5 As one implementation of the water seal tank 21: a water supply pipe 23 and a drain pipe 24 are provided on the water seal tank 21. A control valve 25 is provided on both the water supply pipe 23 and the drain pipe 24. Water is introduced into the water seal tank 21 through the water supply pipe 23 to seal the first overflow pipe 20.

[0039] Please see Figures 1-5 As one embodiment of the water seal tank 1: a spray pipe 26 is provided at the top of the interior of the water seal tank 1, and a liquid inlet pipe 27 is provided on the outside of the water seal tank 1 through the spray pipe 26. A valve 28 is provided on the liquid inlet pipe 27. The external reaction solution can be transported to the spray pipe 26 through the liquid inlet pipe 27 and sprayed evenly inside the water seal tank 1 through the spray pipe 26, so that the reaction liquid dissolves in the water in the water seal tank 1, thereby contacting and reacting with the flue gas passing through the water seal box 21, and enhancing the purification effect of the flue gas.

[0040] In summary:

[0041] This utility model includes a water-sealed tank 1, with a flue gas inlet pipe 2 at the top of the water-sealed tank 1 and a flue gas outlet pipe 3 inclined at the top of the side wall of the water-sealed tank 1. A spiral cooling pipe 4 is installed inside the flue gas outlet pipe 3, and cooling medium conveying pipes 5 are installed at both ends of the spiral cooling pipe 4 to the outside of the flue gas outlet pipe 3. When the flue gas is discharged through the flue gas outlet pipe 3, the cooling medium can be conveyed to the spiral cooling pipe 4 through the cooling medium conveying pipe 5 and flow inside the spiral cooling pipe 4, thereby cooling the discharged flue gas and causing the water vapor carried in the flue gas to condense. The water vapor can then flow back into the water-sealed tank 1 along the spiral cooling pipe 4 and the flue gas outlet pipe 3. This reduces the loss of water in the water tank and dries the discharged flue gas, making it easier for the flue gas to enter the next processing step.

[0042] This invention features a spiral heat exchange tube 6 spirally wound on the outer wall of the flue gas inlet pipe 2. The spiral heat exchange tube 6 extends to the outer side of the water seal tank 1 and is connected to a heat exchange medium conveying pipe 7. When the flue gas is transported to the water seal tank 1 through the flue gas inlet pipe 2, the heat exchange medium for heat exchange is transported to the spiral heat exchange tube 6 through the heat exchange medium conveying pipe 7 and flows in the spiral heat exchange tube 6 to cool the flue gas and heat the heat exchange medium at the same time. This improves the utilization effect of preheating in the flue gas.

[0043] This utility model has a guide pipe 8 at the bottom of the water seal tank 1, and a discharge pipe 9 at the bottom of the guide pipe 8. A discharge control structure is provided inside the discharge pipe 9. The discharge control structure includes a spiral discharge shaft 14, which is rotatably installed inside the discharge pipe 9 through a bearing and extends outward to be connected to a motor 15. When the motor 15 is started, the spiral discharge shaft 14 can be rotated. The rotation of the spiral discharge shaft 14 can discharge the dust and impurities that have fallen into the discharge pipe 9. The use of the spiral discharge shaft 14 for discharge control has stability, so that the sludge and impurities accumulated in the water seal tank 1 can stably fall downward through the guide pipe 8 to the discharge pipe 9 for discharge. During the discharge process, since the bottom is filled with mud, the mud will be discharged first. After the mud is discharged, the water will be discharged. At this time, the opening and closing valve 13 on the guide pipe 8 is closed.

[0044] This invention features a support frame 10 at the bottom of the water seal tank 1, with a flow guide and protection frame 11 at the top of the downward-sloping support frame 10. When dust particles in the flue gas come into contact with the water in the water seal tank 1, they are intercepted and settled at the bottom of the water seal tank 1. By setting the support frame 10 and the flow guide and protection frame 11, the flue gas entering the liquid inside the water seal tank can be prevented from directly impacting the bottom of the water seal tank 1 and disturbing the settled sludge. In this way, the sludge generated by the contact between the flue gas and the water can be stably settled at the bottom of the water seal tank 21, thus facilitating subsequent stable discharge.

[0045] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0046] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here.

[0047] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them.

[0048] Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, and their specific circuit structures will not be elaborated here.

Claims

1. A flue gas water seal tank, comprising a water seal tank body (1), wherein a flue gas inlet pipe (2) is provided at the top of the water seal tank body (1), and a flue gas outlet pipe (3) is obliquely provided at the top of the side wall of the water seal tank body (1), characterized in that: A spiral cooling pipe (4) is provided inside the flue gas outlet pipe (3). Both ends of the spiral cooling pipe (4) extend to the outside of the flue gas outlet pipe (3) and a cooling medium conveying pipe (5) is provided. A spiral heat exchange pipe (6) is spirally wound on the outer wall of the flue gas inlet pipe (2). A heat exchange medium conveying pipe (7) extends to the outside of the water seal tank (1). A guide pipe (8) is provided at the bottom of the water seal tank (1). A discharge pipe (9) is provided at the bottom of the guide pipe (8). A discharge control structure is provided inside the discharge pipe (9). A support frame (10) is provided at the bottom inside the water seal tank (1). A guide protection frame (11) is provided at the top of the downward inclined support frame (10).

2. The flue gas water seal tank according to claim 1, characterized in that: The bottom end of the guide pipe (8) and the water seal tank (1) is provided with a guide cover (12), and the guide pipe (8) is provided with an opening and closing valve (13).

3. A flue gas water seal tank according to claim 1, characterized in that: The emission control structure includes a spiral discharge shaft (14), which is rotatably mounted in the discharge pipe (9) via bearings and extends outward to be connected to a motor (15).

4. A flue gas water seal tank according to claim 1, characterized in that: The water seal tank (1) is equipped with an upper level gauge (16) and a lower level gauge (17). The upper level gauge (16) is located below the end of the flue gas outlet pipe (3) that connects to the water seal tank (1). The upper level gauge (16) is located above the bottom of the flue gas inlet pipe (2). A level fluctuation range is formed between the upper level gauge (16) and the lower level gauge (17).

5. A flue gas water seal tank according to claim 1, characterized in that: The water seal tank (1) is provided with a water inlet pipe (18), and the water inlet pipe (18) is provided with a water inlet valve (19).

6. A flue gas water seal tank according to any one of claims 1-5, characterized in that: The water seal tank (1) is provided with a first overflow pipe (20), the tail end of the first overflow pipe (20) is connected to a water seal box (21), the first overflow pipe (20) extends into the water seal box (21), and the top of the water seal box (21) is provided with a second overflow pipe (22).

7. A flue gas water seal tank according to claim 6, characterized in that: The water seal box (21) is equipped with a water supply pipe (23) and a drain pipe (24), and both the water supply pipe (23) and the drain pipe (24) are equipped with control valves (25).

8. A flue gas water seal tank according to claim 1, characterized in that: The water seal tank (1) is provided with a spray pipe (26) at the top inside. The spray pipe (26) extends to the outside of the water seal tank (1) and is provided with a liquid inlet pipe (27). A valve (28) is provided on the liquid inlet pipe (27).

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