Flue gas desulfurization and water lifting double-circulation integrated equipment
By designing a flue gas desulfurization and water extraction dual circulation integrated equipment to ensure full contact between the flue gas and lime mortar, and using the condensation mechanism to reduce the use of refrigeration equipment, the problems of slow flue gas desulfurization and high production cost are solved, and efficient flue gas desulfurization and water resource recycling are achieved.
Patent Information
- Application Number
- CN202422222926.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-10
AI Technical Summary
During the flue gas treatment process, the contact between the flue gas and lime mortar is insufficient, resulting in slow reaction speed between sulfur dioxide and calcium hydroxide in lime mortar and slow desulfurization; at the same time, the evaporation, condensation and water extraction process of desulfurization wastewater requires additional refrigeration equipment, which increases production costs.
Design a flue gas desulfurization and water extraction dual circulation integrated equipment, including a desulfurization tower body, a collection box and a heating box. By setting up a sealing cover, connecting rod, processing frame, through hole, liquid outlet hole and pump body, ensure that the exhaust gas is in full contact with the lime mortar solution and improve the reaction speed; at the same time, a condensation mechanism is installed in the collection box, using lime mortar liquid to condense steam, reducing dependence on refrigeration equipment.
It improves the contact sufficiency between flue gas and lime mortar, accelerates the desulfurization rate of sulfur dioxide, reduces the production cost of equipment, and achieves the effect of dual recycling.
Smart Images
Figure CN222998572U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas desulfurization and water extraction double circulation, in particular to an integrated device for flue gas desulfurization and water extraction double circulation. Background Technique
[0002] Large-scale lignite units are power generation sets or power stations that use lignite as fuel. When large-scale lignite units burn lignite, a large amount of flue gas will be generated. The flue gas contains carbon dioxide, water vapor, carbon monoxide and various nitrogen oxides. At the same time, because lignite contains sulfur elements, sulfur dioxide will be generated when lignite burns. If the flue gas is directly discharged into the air without purification treatment, it will cause environmental pollution. Therefore, the flue gas usually needs to be desulfurized and denitrified first. Generally, the limestone-gypsum wet flue gas desulfurization technology is adopted. By introducing the flue gas into the absorption tower and spraying lime slurry into the flue gas by nozzles, sulfur dioxide reacts with calcium hydroxide in the lime slurry to form calcium sulfate, so that sulfur dioxide in the flue gas can be effectively removed. The desulfurized flue gas continues to be denitrified until it is purified and then discharged into the air.
[0003] During the limestone-gypsum wet flue gas desulfurization process, a large amount of desulfurized wastewater will be generated. The desulfurized wastewater includes a mixture of gypsum, lime slurry, impurities and water. The desulfurized wastewater is generally treated by methods such as flocculation, precipitation and filtration. The treated desulfurized wastewater is obtained as pure fresh water after evaporation, condensation and water extraction treatment. The extracted pure fresh water can be recycled, and at the same time, the condensed medium water for condensing water vapor can also be recycled after being heated, so as to achieve the effect of double circulation. For example, the condensed medium water and the extracted pure water are used as the boiler make-up water for large-scale lignite units, so as to reduce the power plant's demand for external fresh water and realize the recycling of circulating water.
[0004] However, there are the following defects in the current flue gas treatment process: 1. The flue gas cannot be fully contacted with the lime slurry, the reaction rate of sulfur dioxide and calcium hydroxide in the lime slurry is slow, and the desulfurization rate is slow; 2. External refrigeration equipment is required when the desulfurized wastewater is evaporated, condensed and water extracted, which increases the production cost of the equipment to a certain extent.
[0005] Therefore, it is necessary to provide an integrated device for flue gas desulfurization and water extraction double circulation to solve the above technical problems. Summary of the Utility Model
[0006] The utility model provides an integrated device for flue gas desulfurization and water extraction double circulation, which solves the problems in the background technique.
[0007] To solve the above technical problems, a dual-circulation integrated flue gas desulfurization and water extraction device provided by the utility model includes a desulfurization tower body, a collection box, and a heating box. The collection box is installed through the bottom end of the desulfurization tower body, and the collection box is fixed above the heating box through a support rod. The top surface of the desulfurization tower body is spirally connected with a sealing cover. A treatment frame is arranged on the bottom surface of the sealing cover through a connecting rod. A plurality of through holes are formed through the surface of the treatment frame, and a plurality of liquid outlet holes are formed in the inner wall of the through holes. A plurality of treatment frames are provided, and the plurality of treatment frames are sequentially connected through a drainage pipe from top to bottom. A pump body is installed on the outer surface of the collection box. The input end of the pump body is connected to the collection box through a pipeline, and the output end of the pump body is connected to the uppermost drainage pipe through a pipeline. By setting the cooperation of the sealing cover, the connecting rod, the treatment frame, the through holes, the liquid outlet holes, and the pump body, it is convenient for the waste gas entering the desulfurization tower body to fully contact with the lime slurry solution, thereby improving the sufficiency of the contact between the waste gas and the lime slurry, and increasing the reaction rate of sulfur dioxide with calcium hydroxide in the lime slurry, accelerating the desulfurization rate of the flue gas. When operating, the staff injects the lime slurry solution into the collection box through the feeding port, then starts the pump body, and then injects the lime slurry solution into each treatment frame through the pipeline under the action of the pump body, and then sprays out from the liquid outlet of the through hole. At this time, the external waste gas enters the desulfurization tower body through the intake pipe, and then the waste gas drifts upward. At this time, the waste gas must pass through the through hole, so that in the process of the waste gas entering the through hole, the waste gas is fully contacted with the lime slurry solution. Moreover, a plurality of treatment frames are provided, so that the waste gas can be treated multiple times. This method is simple to operate and greatly improves the effect of waste gas removal.
[0008] Preferably, a condensation mechanism is installed inside the collection box. A first annular pipe and a second annular pipe are arranged inside the condensation mechanism, and the first annular pipe and the second annular pipe are connected through a condensation pipe. A steam delivery pipe is penetrated and arranged on the outer surface of the heating box, and the other end of the steam delivery pipe penetrates the collection box and is connected to the first annular pipe. One end of the second annular pipe is penetrated and provided with a drain pipe, and one end of the drain pipe penetrates the surface of the collection box and extends to the outside. By installing the condensation mechanism inside the collection box, the lime slurry liquid inside the collection box can condense the steam inside the condensation mechanism. This method is simple to operate and is convenient for cooling with the lime slurry solution without additionally installing a refrigeration mechanism, which reduces the production cost of the equipment to a certain extent. When operating, the steam generated inside the heating box enters the steam delivery pipe, and then is transported through the steam delivery pipe into the first annular pipe. Then the steam is shunted through the first annular pipe into each condensation pipe, and then the condensate inside the collection box condenses the steam inside. Then the condensed liquid flows into the second annular pipe and is finally discharged through the drain pipe. This method is simple to operate.
[0009] Preferably, a heating wire is installed inside the heating box. The collection box and the heating box are connected through a diversion pipe in a penetrating manner. A valve is installed on the surface of the diversion pipe. By setting the heating wire, it is convenient to heat the liquid entering the heating box. By setting the diversion pipe, it is convenient for the waste liquid in the collection box to enter the heating box for subsequent treatment.
[0010] Preferably, a feeding port is penetrated and opened on the outer surface of the collection box. A sewage discharge pipe is arranged below the surface of the heating box. An exhaust port is penetrated and arranged on the top surface of the sealing cover. An intake pipe is penetrated and arranged below the surface of the desulfurization tower body. By setting the feeding port, it is convenient to inject lime slurry liquid into the collection box. By setting the sewage discharge pipe, it is convenient to discharge the liquid. By setting the intake pipe, it is convenient for the waste gas to enter the desulfurization tower body.
[0011] Preferably, a plurality of support rods are provided, and the plurality of support rods are installed around the collection box and the heating box at equal distances. By setting the plurality of support rods, it is convenient to improve the support performance of the heating box for the collection box and ensure its stability during operation.
[0012] Preferably, a plurality of condenser pipes are provided, and the plurality of condenser pipes are installed around the first annular pipe and the second annular pipe at equal distances. By setting the plurality of condenser pipes, it is convenient for the dispersed transportation of steam, thereby improving the condensation efficiency of steam.
[0013] Preferably, a controller is installed on the outer surface of the desulfurization tower body. The controller is electrically connected to the electrical components inside the equipment. By setting the controller, it is convenient to control the electrical components inside the equipment and convenient to control the whole equipment.
[0014] Compared with the related technology, a flue gas desulfurization and water extraction double-cycle integrated equipment provided by the present utility model has the following beneficial effects:
[0015] By setting the cooperation use of the sealing cover, the connecting rod, the treatment frame, the through hole, the liquid outlet hole, and the pump body, it is convenient for the waste gas entering the desulfurization tower body to fully contact with the lime slurry solution, thereby improving the sufficiency of the contact between the waste gas and the lime slurry, and increasing the reaction speed of sulfur dioxide with calcium hydroxide in the lime slurry, accelerating the desulfurization speed of the flue gas. When operating, the staff injects the lime slurry solution into the collection box through the feeding port, then starts the pump body, and then under the action of the pump body, injects the lime slurry solution into each treatment frame through the pipeline and sprays it out from the liquid outlet of the through hole. At this time, the external waste gas enters the desulfurization tower body through the intake pipe, and then the waste gas drifts upward. At this time, the waste gas must pass through the through hole, so that during the process of the waste gas entering the through hole, the waste gas fully contacts with the lime slurry solution, and since there are multiple treatment frames, the waste gas can be treated multiple times. This method is simple to operate and greatly improves the effect of waste gas removal.
[0016] By installing the condensation mechanism inside the collection tank, the lime slurry liquid inside the collection tank can condense the steam inside the condensation mechanism. This method is simple to operate, facilitating cooling using the lime slurry solution without the need to additionally install a refrigeration mechanism, reducing the production cost of the equipment to a certain extent. During operation, the steam generated inside the heating tank enters the steam delivery pipe, then is transported through the steam delivery pipe into the first annular pipe, and then the steam enters each condensation pipe through the diversion of the first annular pipe. Then, the condensate inside the collection tank condenses the internal steam, and the condensed liquid then flows into the second annular pipe and finally is discharged through the drain pipe. This method is simple to operate. Brief Description of the Drawings
[0017] Figure 1 It is a schematic structural diagram of a flue gas desulfurization and water extraction dual-cycle integrated device provided by the present utility model;
[0018] Figure 2 It is a schematic internal structure diagram of a flue gas desulfurization and water extraction dual-cycle integrated device provided by the present utility model;
[0019] Figure 3 It is a schematic structural diagram of the condensation mechanism of a flue gas desulfurization and water extraction dual-cycle integrated device provided by the present utility model;
[0020] Figure 4 It is a schematic external structure diagram of the treatment frame of a flue gas desulfurization and water extraction dual-cycle integrated device provided by the present utility model;
[0021] Figure 5 It is a schematic internal structure diagram of the treatment frame of a flue gas desulfurization and water extraction dual-cycle integrated device provided by the present utility model;
[0022] Figure 6 It is a schematic structural diagram of the liquid outlet hole of a flue gas desulfurization and water extraction dual-cycle integrated device provided by the present utility model;
[0023] Figure 7 It is a front view of a flue gas desulfurization and water extraction dual-cycle integrated device provided by the present utility model.
[0024] Reference numerals in the drawings:
[0025] 1. Desulfurization tower body; 2. Controller; 3. Feeding port; 4. Collection box; 5. Support rod; 6. Drain pipe; 7. Heating box; 8. Sewage discharge pipe; 9. Steam delivery pipe; 10. Pump body; 11. Pipeline; 12. Sealing cover; 13. Exhaust port; 14. Treatment frame; 15. Valve; 16. Diversion pipe; 17. Heating wire; 18. Condensation mechanism; 19. First annular pipe; 20. Condensation pipe; 21. Second annular pipe; 22. Drainage pipe; 23. Through hole; 24. Liquid outlet hole. Specific embodiments
[0026] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0027] Embodiment 1
[0028] Refer to Figures 1-7 , a flue gas desulfurization and water extraction double - cycle integrated device, including a desulfurization tower body 1, a collection box 4 and a heating box 7. The collection box 4 is installed through - hole at the bottom end of the desulfurization tower body 1. The collection box 4 is fixed above the heating box 7 through a support rod 5. The top surface of the desulfurization tower body 1 is spirally connected with a sealing cover 12. The bottom surface of the sealing cover 12 is provided with a treatment frame 14 through a connecting rod. A plurality of through holes 23 are formed through the surface of the treatment frame 14. A plurality of liquid outlet holes 24 are formed on the inner wall of the through holes 23. A plurality of treatment frames 14 are provided, and the plurality of treatment frames 14 are sequentially connected through a drainage pipe 22 from top to bottom. A pump body 10 is installed on the outer surface of the collection box 4. The input end of the pump body 10 is connected to the collection box 4 through a pipeline 11 in a through - hole manner. The output end of the pump body 10 is connected to the uppermost drainage pipe 22 through a pipeline 11 in a through - hole manner. During operation, the staff injects lime slurry solution into the collection box 4 through the feeding port 3, then starts the pump body 10, and then under the action of the pump body 10, injects the lime slurry solution into each treatment frame 14 through the pipeline 11, and then sprays out from the liquid outlet of the through hole 23. At this time, the external waste gas enters the desulfurization tower body 1 through the intake pipe, and then the waste gas drifts upward. At this time, the waste gas must pass through the through hole 23, so that in the process of the waste gas entering the through hole 23, the waste gas is fully contacted with the lime slurry solution. Moreover, a plurality of treatment frames 14 are provided, so that the waste gas can be treated multiple times. This method is simple to operate and greatly improves the effect of waste gas desulfurization.
[0029] The working principle of a flue gas desulfurization and water extraction double - cycle integrated device provided by the present utility model is as follows:
[0030] When the integrated equipment for double-cycle flue gas desulfurization and water extraction operates, the staff injects lime slurry solution into the inside of the collection tank 4 through the feeding port 3, then starts the pump body 10, and then under the action of the pump body 10, injects the lime slurry solution into each treatment frame 14 through the pipeline 11, and then sprays it out from the liquid outlet of the through hole 23. At this time, the external waste gas enters the desulfurization tower body 1 through the air inlet pipe, and then the waste gas drifts upward. At this time, the waste gas must pass through the through hole 23 for output. Thus, during the process of the waste gas entering the through hole 23, the waste gas is fully contacted with the lime slurry solution. Moreover, multiple treatment frames 14 are provided, so that the waste gas can be treated multiple times. This method is simple to operate and greatly improves the effect of waste gas removal. By installing the condensation mechanism 18 inside the collection tank 4, the lime slurry liquid inside the collection tank 4 can condense the steam inside the condensation mechanism 18. This method is simple to operate and is convenient to use the lime slurry solution for cooling without additionally installing a refrigeration mechanism, which reduces the production cost of the equipment to a certain extent. When operating, the steam generated inside the heating tank 7 enters the steam delivery pipe 9, and then is delivered into the first annular pipe 19 through the steam delivery pipe 9. Then the steam is shunted through the first annular pipe 19 into each condensation pipe 20, and then the condensed liquid inside the collection tank 4 condenses the steam inside. After that, the condensed liquid flows into the second annular pipe 21 and finally is discharged through the drain pipe 6. This method is simple to operate.
[0031] Compared with the related technology, an integrated equipment for double-cycle flue gas desulfurization and water extraction provided by the present utility model has the following beneficial effects:
[0032] By the combined use of the sealing cover 12, the connecting rod, the treatment frame 14, the through hole 23, the liquid outlet hole 24, and the pump body 10, it is convenient to make the waste gas entering the desulfurization tower body 1 fully contact with the lime slurry solution, thereby improving the sufficiency of the contact between the waste gas and the lime slurry, and increasing the reaction rate of sulfur dioxide with calcium hydroxide in the lime slurry, accelerating the desulfurization rate of the flue gas. When operating, the staff injects the lime slurry solution into the inside of the collection tank 4 through the feeding port 3, then starts the pump body 10, and then under the action of the pump body 10, injects the lime slurry solution into each treatment frame 14 through the pipeline 11, and then sprays it out from the liquid outlet of the through hole 23. At this time, the external waste gas enters the desulfurization tower body 1 through the air inlet pipe, and then the waste gas drifts upward. At this time, the waste gas must pass through the through hole 23 for output. Thus, during the process of the waste gas entering the through hole 23, the waste gas is fully contacted with the lime slurry solution. Moreover, multiple treatment frames 14 are provided, so that the waste gas can be treated multiple times. This method is simple to operate and greatly improves the effect of waste gas removal.
[0033] By installing the condensation mechanism 18 inside the collection tank 4, the lime slurry liquid inside the collection tank 4 can condense the steam inside the condensation mechanism 18. This method is simple to operate, facilitating the use of the lime slurry solution for cooling without the need to additionally install a refrigeration mechanism, reducing the production cost of the equipment to a certain extent. During operation, the steam generated inside the heating tank 7 enters the steam delivery pipe 9, and then is transported through the steam delivery pipe 9 into the first annular pipe 19. Then, the steam is divided through the first annular pipe 19 and enters each condensation pipe 20. Next, the condensate inside the collection tank 4 condenses the steam inside. After that, the condensed liquid flows into the second annular pipe 21 and finally is discharged through the drain pipe 6. This method is simple to operate.
[0034] Embodiment 2
[0035] Based on Embodiment 1, refer to Figures 1-3 Preferably, a condensation mechanism 18 is installed inside the collection tank 4. Inside the condensation mechanism 18, a first annular pipe 19 and a second annular pipe 21 are provided. The first annular pipe 19 and the second annular pipe 21 are connected through a condensation pipe 20 in a through manner. The outer surface of the heating tank 7 is provided with a steam delivery pipe 9 in a through manner. The other end of the steam delivery pipe 9 penetrates the collection tank 4 and is connected to the first annular pipe 19 in a through manner. One end of the second annular pipe 21 is provided with a drain pipe 6. One end of the drain pipe 6 penetrates the surface of the collection tank 4 and extends to the outside. During operation, the steam generated inside the heating tank 7 enters the steam delivery pipe 9, and then is transported through the steam delivery pipe 9 into the first annular pipe 19. Then, the steam is divided through the first annular pipe 19 and enters each condensation pipe 20. Next, the condensate inside the collection tank 4 condenses the steam inside. After that, the condensed liquid flows into the second annular pipe 21 and finally is discharged through the drain pipe 6. This method is simple to operate.
[0036] Based on Embodiment 1, refer to Figures 1-2 A heating wire 17 is installed inside the heating tank 7. The collection tank 4 and the heating tank 7 are connected through a diversion pipe 16 in a through manner. A valve 15 is installed on the surface of the diversion pipe 16. By providing the heating wire 17, it is convenient to heat the liquid entering the heating tank 7. By providing the diversion pipe 16, it is convenient to make the waste liquid inside the collection tank 4 enter the heating tank 7 for subsequent treatment.
[0037] Based on Embodiment 1, refer to Figure 1 and Figure 7, a charging port 3 is formed through the outer surface of the collection box 4, a sewage discharge pipe 8 is arranged below the surface of the heating box 7, an exhaust port 13 is formed through the top surface of the sealing cover 12, and an intake pipe is formed through the lower part of the surface of the desulfurization tower body 1. By providing the charging port 3, it is convenient to inject lime slurry liquid into the collection box 4. By providing the sewage discharge pipe 8, it is convenient to discharge the liquid. By providing the intake pipe, it is convenient for waste gas to enter the desulfurization tower body 1.
[0038] Based on Embodiment 1, refer to Figures 1-2 , a plurality of support rods 5 are provided, and the plurality of support rods 5 are installed equidistantly and circumferentially between the collection box 4 and the heating box 7. By providing the plurality of support rods 5, it is convenient to improve the support performance of the heating box 7 for the collection box 4 and ensure its stability during operation.
[0039] Based on Embodiment 1, refer to Figures 1-7 , a plurality of condensing pipes 20 are provided, and the plurality of condensing pipes 20 are installed equidistantly and circumferentially between the first annular pipe 19 and the second annular pipe 21. By providing the plurality of condensing pipes 20, it is convenient to disperse and transport the steam, thereby improving the condensation efficiency of the steam.
[0040] Based on Embodiment 1, refer to Figure 1 , a controller 2 is installed on the outer surface of the desulfurization tower body 1, and the controller 2 is electrically connected to the electrical components inside the device. By providing the controller 2, it is convenient to control the electrical components inside the device and the overall device. The controller 2 belongs to the common knowledge in the field, and only its use is described without modification, so the control method and circuit connection are not described in detail.
[0041] It should be noted that all kinds of components used in this application document are standard parts and can be purchased from the market. The specific connection methods of each part all adopt conventional means such as bolts, rivets and welding in the existing technology. The machinery, parts and electrical equipment all adopt conventional models in the existing technology. The circuit connection adopts the conventional connection method in the existing technology. The electrical equipment is connected to the external safe power supply. No specific description is made here.
[0042] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present invention by the same token.
Claims
1. A flue gas desulfurization and water extraction dual circulation integrated equipment, characterized in that: The desulfurization tower comprises a desulfurization tower body (1), a collecting box (4) and a heating box (7), wherein the collecting box (4) is installed through the bottom end of the desulfurization tower body (1), and the collecting box (4) is fixed above the heating box (7) through a supporting rod (5). A sealing cover (12) is spirally connected to the top surface of the desulfurization tower body (1), and a processing frame (14) is arranged on the bottom surface of the sealing cover (12) through a connecting rod, and a plurality of through holes (23) are opened through the surface of the processing frame (14). The inner wall of the through hole (23) is provided with a plurality of liquid outlet holes (24); a plurality of the processing frames (14) are provided, and the plurality of processing frames (14) are connected in sequence from top to bottom through a drainage pipe (22); a pump body (10) is installed on the outer surface of the collection box (4); the input end of the pump body (10) is connected to the collection box (4) through a pipe (11); and the output end of the pump body (10) is connected to the drainage pipe (22) at the top through a pipe (11).
2. The flue gas desulfurization and water extraction dual circulation integrated equipment according to claim 1 is characterized in that: A condensing mechanism (18) is installed inside the collecting box (4), and a first annular tube (19) and a second annular tube (21) are arranged inside the condensing mechanism (18), and the first annular tube (19) and the second annular tube (21) are connected through a condensing tube (20). A steam delivery pipe (9) is arranged through the outer surface of the heating box (7), and the other end of the steam delivery pipe (9) passes through the collecting box (4) and is connected to the first annular tube (19). A drainage pipe (6) is arranged through one end of the second annular tube (21), and one end of the drainage pipe (6) passes through the surface of the collecting box (4) and extends to the outside.
3. The flue gas desulfurization and water extraction dual circulation integrated equipment according to claim 1 is characterized in that: A heating wire (17) is installed inside the heating box (7), and the collecting box (4) and the heating box (7) are connected through a flow guide pipe (16), and a valve (15) is installed on the surface of the flow guide pipe (16).
4. The flue gas desulfurization and water extraction dual circulation integrated equipment according to claim 1 is characterized in that: The outer surface of the collecting box (4) is provided with a material injection port (3), a sewage discharge pipe (8) is provided below the surface of the heating box (7), an exhaust port (13) is provided on the top surface of the sealing cover (12), and an air inlet pipe is provided below the surface of the desulfurization tower body (1).
5. The flue gas desulfurization and water extraction dual circulation integrated equipment according to claim 1 is characterized in that: A plurality of support rods (5) are provided, and the plurality of support rods (5) are installed around and at equal distances between the collecting box (4) and the heating box (7).
6. The flue gas desulfurization and water extraction dual circulation integrated equipment according to claim 2 is characterized in that: A plurality of condensing tubes (20) are provided, and the plurality of condensing tubes (20) are installed around and at equal distances between the first annular tube (19) and the second annular tube (21).
7. The flue gas desulfurization and water extraction dual circulation integrated equipment according to claim 1 is characterized in that: A controller (2) is installed on the outer surface of the desulfurization tower body (1), and the controller (2) is electrically connected to electrical components inside the device.