Device for heating low-temperature flue gas after wet flue gas desulfurization
By using activated carbon filters and sealing gaskets in the wet flue gas desulfurization heating device, the problem of small particles and impurities in the flue gas affecting heat exchange efficiency is solved, long-term effective filtration and pressure relief effects are achieved, and heating efficiency is improved .
Patent Information
- Application Number
- CN202420845306.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing wet flue gas desulfurization heating device is not filtered before heating, resulting in small and particulate impurities in the flue gas adhering to the surface of the heat exchange device, forming dirt, and affecting the heat exchange efficiency.
A low-temperature flue gas heating device including an installation mechanism, a heat exchange mechanism, a drainage mechanism, a conveying mechanism and a pressure relief mechanism are designed. By placing activated carbon filters and sealing gaskets on the inner wall of the sealing cover, the filtration and automatic pressure relief of flue gas are achieved. , regularly replace activated carbon filters and optimize the connection seal design to ensure long-term filtration effect.
Effectively absorb fine impurities in the flue gas, prevent leakage at the connection area, maintain long-term filtration effect, improve heat exchange efficiency, and prevent flue gas from being accumulated through automatic pressure relief mechanism to ensure smooth discharge of flue gas.
Smart Images
Figure CN222305146U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of low-temperature flue gas heating, in particular to a low-temperature flue gas heating device after wet flue gas desulfurization. Background Art
[0002] Wet flue gas desulfurization refers to a desulfurization method that uses an ejector to spray lime milk or limestone slurry into the flue gas to react chemically with sulfur dioxide to form gypsum precipitation. After wet flue gas desulfurization, the flue gas needs to be heated to recover moisture and increase the flue gas temperature for further treatment or discharge.
[0003] However, in the existing technology, most heating devices do not filter the flue gas before heating, and many small particulate impurities will remain in the flue gas. These small particulate impurities will adhere to the surface of the heat exchange device during the heat exchange between the flue gas and the heat exchange device, forming a thin layer of dirt. As time accumulates, this layer of dirt will become thicker and thicker, thereby affecting the efficiency of heat exchange. Utility Model Content
[0004] The purpose of the utility model is to provide a low-temperature flue gas heating device after wet flue gas desulfurization. By providing an installation mechanism, regularly replacing the activated carbon filter and having a good connection and sealing design, the filtration system can maintain a good filtration effect for a long time, thereby ensuring a long-term and effective heat exchange effect, and solving the problem that most heating devices do not filter the flue gas before heating, and many small granular impurities will remain in the flue gas, affecting the efficiency of heat exchange.
[0005] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:
[0006] The utility model is a low-temperature flue gas heating device after wet flue gas desulfurization, comprising a heating cylinder, a sealing cover and a desulfurization tower, wherein the heating cylinder is provided with a mounting mechanism, a heat exchange mechanism, a drainage mechanism, a conveying mechanism, a heating mechanism and a pressure relief mechanism;
[0007] The mounting mechanism includes a smoke outlet pipe fixedly connected to the top surface of the sealing cover, one end of the smoke outlet pipe away from the sealing cover is fixedly connected to the top of the desulfurization tower, a bolt is threadedly connected between the sealing cover and the heating cylinder, a first groove is provided on the inner wall of the heating cylinder, a sealing gasket is placed on the inner wall of the sealing cover, a second groove is provided on the inner wall of the sealing cover, an activated carbon filter is placed on the inner wall of the second groove, and the bottom surface of the activated carbon filter fits the top surface of the sealing gasket.
[0008] Furthermore, the heat exchange mechanism includes two fixed sleeves fixedly connected to the inner wall of the heating cylinder, and a plurality of heat conduction pipes penetrate between the two fixed sleeves.
[0009] Furthermore, the drainage mechanism includes a water tank fixedly connected to the top surface of the heating cylinder, the inner wall of the water tank is fixedly connected to a first liquid pump, the input end of the first liquid pump is fixedly connected to a water outlet pipe, and the end of the water outlet pipe away from the first liquid pump is fixedly connected to the heating cylinder.
[0010] Furthermore, the conveying mechanism includes a second liquid pump fixedly connected to the inner wall of the heating cylinder, the output end of the second liquid pump is fixedly connected to a water supply pipe, the end of the water supply pipe away from the second liquid pump is fixedly connected to the heating cylinder, the front of the water tank is fixedly connected to a drain pipe, and the drain pipe is fixedly connected to an electronic valve.
[0011] Furthermore, the heating mechanism includes a heating base fixedly connected to the bottom surface of the heating cylinder, a plurality of heating rods are fixedly installed on the bottom surface of the heating base, and the top ends of the heating rods extend to the inside of the water tank.
[0012] Furthermore, the pressure relief mechanism includes a sealing box fixedly connected to the top surface of the water tank, a sliding rod is slidably installed on the top surface of the sealing box, the bottom end of the sliding rod extends to the interior of the sealing box, the bottom end of the sliding rod is fixedly connected to a piston plate, the piston plate is slidably connected to the inner wall of the sealing box, a spring is sleeved on the sliding rod, the bottom end of the spring is fixedly connected to the top surface of the piston plate, and the top end of the spring is fixedly connected to the inner wall of the sealing box.
[0013] Furthermore, a gas permeable membrane is fixedly connected to the bottom surface of the sealing box.
[0014] The utility model has the following beneficial effects:
[0015] 1. By providing an installation mechanism, the activated carbon filter can filter the flue gas, so that the fine impurities in the flue gas can be adsorbed and filtered by the activated carbon filter. At the same time, after the activated carbon filter is used for a long time, the filtering effect of the activated carbon filter decreases. The bolts and the sealing cover cooperate with each other to enable the sealing cover to be disassembled, so that the activated carbon filter can be replaced. A sealing gasket is placed in the second card slot. During splicing and assembly, the sealing performance during the connection can be enhanced, ensuring that the filtering system will not be affected by the leakage of the connection parts during long-term use. The filtering effect can be maintained for a long time by regularly replacing the activated carbon filter and having a good connection and sealing design.
[0016] 2. By providing a pressure relief mechanism, after the water vapor in the flue gas condenses into water droplets and flows into the water tank, the flue gas will also flow into the water tank. When the pressure inside the water tank is high, the gas flows into the sealed box, making the inside of the sealed box a high-pressure state, thereby driving the piston plate to move upward. When the piston plate moves to the exhaust pipe, the treated flue gas can be discharged through the exhaust pipe, which plays a role of automatic pressure relief.
[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0019] Figure 1 This is a schematic diagram of the overall structure of a low-temperature flue gas heating device after wet flue gas desulfurization according to the utility model;
[0020] Figure 2 It is a front cross-sectional structural schematic diagram of a heating cylinder of a low-temperature flue gas heating device after wet flue gas desulfurization of the utility model;
[0021] Figure 3 It is a right side cross-sectional structural schematic diagram of a heating cylinder of a low-temperature flue gas heating device after wet flue gas desulfurization of the utility model;
[0022] Figure 4 It is a schematic diagram of the left side cross-sectional structure of a water storage tank of a low-temperature flue gas heating device after wet flue gas desulfurization of the utility model;
[0023] Figure 5 The utility model is a low-temperature flue gas heating device after wet flue gas desulfurization Figure 2 Schematic diagram of the enlarged structure at point A in the middle.
[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0025] 1. Heating cylinder; 2. Mounting mechanism; 3. Heat exchange mechanism; 4. Drainage mechanism; 5. Conveying mechanism; 6. Heating mechanism; 7. Pressure relief mechanism; 21. Sealing cover; 22. Smoke outlet pipe; 23. Desulfurization tower; 24. Bolt; 25. First slot; 26. Sealing gasket; 27. Second slot; 28. Activated carbon filter; 31. Fixing sleeve; 32. Heat transfer pipe; 41. Water storage tank; 42. Water outlet pipe; 43. First liquid pump; 51. Water supply pipe; 52. Second liquid pump; 53. Drainage pipe; 54. Electronic valve; 61. Heating base; 62. Heating rod; 71. Sealing box; 72. Sliding rod; 73. Piston plate; 74. Spring; 75. Smoke outlet pipe; 76. Gas permeable membrane. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] See also Figure 1-5 As shown, the utility model is a low-temperature flue gas heating device after wet flue gas desulfurization, comprising a heating cylinder 1, a sealing cover 21 and a desulfurization tower 23, and the heating cylinder 1 is provided with a mounting mechanism 2, a heat exchange mechanism 3, a drainage mechanism 4, a conveying mechanism 5, a heating mechanism 6 and a pressure relief mechanism 7;
[0028] The mounting mechanism 2 includes a smoke outlet pipe 22 fixedly connected to the top surface of the sealing cover 21, and one end of the smoke outlet pipe 22 away from the sealing cover 21 is fixedly connected to the top of the desulfurization tower 23. A bolt 24 is threadedly connected between the sealing cover 21 and the heating cylinder 1. A first groove 25 is provided on the inner wall of the heating cylinder 1, and a sealing gasket 26 is placed on the inner wall of the sealing cover 21. A second groove 27 is provided on the inner wall of the sealing cover 21, and an activated carbon filter 28 is placed on the inner wall of the second groove 27. The bottom surface of the activated carbon filter 28 fits with the top surface of the sealing gasket 26.
[0029] Among them Figure 2 As shown, the heat exchange mechanism 3 includes two fixed sleeves 31 fixedly connected to the inner wall of the heating tube 1 , and a plurality of heat conducting pipes 32 penetrate between the two fixed sleeves 31 .
[0030] By providing a heat exchange mechanism 3, hot water can heat the flue gas inside the heat pipe 32 when passing through the interior of the heating tube 1. During the heating process, when the flue gas containing low-temperature water vapor is heated, the temperature of the water vapor will gradually increase. If the amount of water vapor in the flue gas is too large or the temperature of the medium changes greatly, the saturation of the water vapor will increase. Condensation will occur when it exceeds its saturation point, and water droplets will fall through the heat pipe 32 to the interior of the water storage tank 41 for storage, which is convenient for recycling.
[0031] Among them Figure 2 As shown, the drainage mechanism 4 includes a water tank 41 fixedly connected to the top surface of the heating cylinder 1, the inner wall of the water tank 41 is fixedly connected to a first liquid pump 43, the input end of the first liquid pump 43 is fixedly connected to a water outlet pipe 42, and the end of the water outlet pipe 42 away from the first liquid pump 43 is fixedly connected to the heating cylinder 1.
[0032] By providing the drainage mechanism 4, the hot water at the bottom of the heating cylinder 1 is pumped into the water storage tank 41 through the cooperation between the water outlet pipe 42 and the first liquid pump 43 after heat exchange, so as to facilitate subsequent recycling.
[0033] Among them Figure 3 As shown, the conveying mechanism 5 includes a second liquid pump 52 fixedly connected to the inner wall of the heating cylinder 1, the output end of the second liquid pump 52 is fixedly connected to a water supply pipe 51, one end of the water supply pipe 51 away from the second liquid pump 52 is fixedly connected to the heating cylinder 1, and the front of the water storage tank 41 is fixedly connected to a drain pipe 53, and the drain pipe 53 is fixedly connected to an electronic valve 54.
[0034] By providing a conveying mechanism 5, after the water inside the water storage tank 41 is heated, it can be pumped into the heating tube 1 through the cooperation of the water delivery pipe 51 and the second liquid pump 52 to exchange heat with the flue gas inside the heat conduction pipe 32, and when the amount of water inside the water storage tank 41 is large, the electronic valve 54 can be opened to discharge excess water.
[0035] Among them Figure 3 As shown, the heating mechanism 6 includes a heating base 61 fixedly connected to the bottom surface of the heating tube 1 , and a plurality of heating rods 62 are fixedly installed on the bottom surface of the heating base 61 , and the top ends of the heating rods 62 extend to the inside of the water storage tank 41 .
[0036] By providing the heating mechanism 6, the heating base 61 can heat the water inside the water storage tank 41. At the same time, in cooperation with the drainage mechanism 4 and the conveying mechanism 5, the effect of water recycling is achieved, which greatly improves the utilization rate of thermal energy.
[0037] Among them Figure 4 As shown, the pressure relief mechanism 7 includes a sealing box 71 fixedly connected to the top surface of the water storage tank 41, a sliding rod 72 is slidably installed on the top surface of the sealing box 71, the bottom end of the sliding rod 72 extends to the interior of the sealing box 71, the bottom end of the sliding rod 72 is fixedly connected to a piston plate 73, the piston plate 73 is slidably connected to the inner wall of the sealing box 71, a spring 74 is sleeved on the sliding rod 72, the bottom end of the spring 74 is fixedly connected to the top surface of the piston plate 73, and the top end of the spring 74 is fixedly connected to the inner wall of the sealing box 71.
[0038] By providing a pressure relief mechanism 7, after the water vapor in the flue gas condenses into water droplets and flows into the water storage tank 41, the flue gas will also flow into the water storage tank 41. When the pressure inside the water storage tank 41 is relatively high, the gas flows into the inside of the sealed box 71, making the inside of the sealed box 71 in a high pressure state, thereby driving the piston plate 73 to move upward. When the piston plate 73 moves to the exhaust pipe 75, the treated flue gas can be discharged through the exhaust pipe 75, thereby achieving the effect of automatic pressure relief.
[0039] Among them Figure 4 As shown, a gas permeable membrane 76 is fixedly connected to the bottom surface of the sealing box 71 .
[0040] By providing the gas permeable membrane 76 , it is possible to prevent the water inside the water storage tank 41 from penetrating into the inside of the sealing box 71 , thereby preventing the water from affecting the pressure relief effect.
[0041] A specific application of this embodiment is: by providing the mounting mechanism 2, the activated carbon filter 28 can filter the flue gas, so that the fine impurities in the flue gas can be adsorbed and filtered by the activated carbon filter 28. At the same time, after the activated carbon filter 28 is used for a long time, the filtering effect of the activated carbon filter 28 decreases. The bolt 24 cooperates with the sealing cover 21 to enable the sealing cover 21 to be disassembled, so that the activated carbon filter 28 can be replaced. In addition, a sealing gasket 26 is placed in the second card slot 27. During the splicing and assembly, the sealing performance during the connection can be enhanced, ensuring that during the long-term use of the filter system, the flue gas will not affect the filtering effect due to leakage at the connection part. By regularly replacing the activated carbon filter and a good connection sealing design, the filter system can maintain a good filtering effect for a long time.
[0042] By providing the heat exchange mechanism 3, when hot water passes through the interior of the heating tube 1, it can heat the flue gas inside the heat pipe 32. During the heating process, when the flue gas containing low-temperature water vapor is heated, the temperature of the water vapor will gradually increase. If the amount of water vapor in the flue gas is too large or the temperature of the medium changes greatly, the saturation of the water vapor will increase. When it exceeds its saturation point, condensation will occur, and water droplets will fall through the heat pipe 32 and flow into the water storage tank 41 for storage, which is convenient for recycling.
[0043] By providing a drainage mechanism 4, the hot water at the bottom of the heating cylinder 1 is pumped into the water storage tank 41 through the cooperation between the water outlet pipe 42 and the first liquid pump 43 after heat exchange, so as to facilitate subsequent recycling;
[0044] By providing the conveying mechanism 5, after the water in the water storage tank 41 is heated, the water can be pumped into the heating cylinder 1 through the cooperation of the water delivery pipe 51 and the second liquid pump 52 to exchange heat with the smoke in the heat conducting pipe 32. When the amount of water in the water storage tank 41 is large, the electronic valve 54 can be opened to discharge the excess water.
[0045] By providing the heating mechanism 6, the heating base 61 can heat the water inside the water storage tank 41, and cooperate with the drainage mechanism 4 and the conveying mechanism 5 to achieve the effect of water recycling, greatly improving the utilization rate of thermal energy;
[0046] By providing the pressure relief mechanism 7, after the water vapor in the flue gas condenses into water droplets and flows into the water storage tank 41, the flue gas will also flow into the water storage tank 41. When the pressure inside the water storage tank 41 is relatively high, the gas will flow into the sealed box 71, making the inside of the sealed box 71 in a high pressure state, thereby driving the piston plate 73 to move upward. When the piston plate 73 moves to the exhaust pipe 75, the treated flue gas can be discharged through the exhaust pipe 75, which plays a role of automatic pressure relief.
[0047] By providing the gas permeable membrane 76 , it is possible to prevent the water inside the water storage tank 41 from penetrating into the inside of the sealing box 71 , thereby preventing the water from affecting the pressure relief effect.
[0048] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0049] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A low-temperature flue gas heating device after wet flue gas desulfurization, comprising a heating cylinder (1), a sealing cover (21) and a desulfurization tower (23), characterized in that: The heating cylinder (1) is provided with a mounting mechanism (2), a heat exchange mechanism (3), a drainage mechanism (4), a conveying mechanism (5), a heating mechanism (6) and a pressure relief mechanism (7); The mounting mechanism (2) comprises a smoke outlet pipe (22) fixedly connected to the top surface of the sealing cover (21); one end of the smoke outlet pipe (22) away from the sealing cover (21) is fixedly connected to the top of the desulfurization tower (23); a bolt (24) is threadedly connected between the sealing cover (21) and the heating cylinder (1); a first groove (25) is provided on the inner wall of the heating cylinder (1); a sealing gasket (26) is placed on the inner wall of the sealing cover (21); a second groove (27) is provided on the inner wall of the sealing cover (21); an activated carbon filter (28) is placed on the inner wall of the second groove (27); the bottom surface of the activated carbon filter (28) is in contact with the top surface of the sealing gasket (26).
2. The low-temperature flue gas heating device after wet flue gas desulfurization according to claim 1 is characterized in that: The heat exchange mechanism (3) comprises two fixed sleeves (31) fixedly connected to the inner wall of the heating cylinder (1), and a plurality of heat conduction pipes (32) pass through the two fixed sleeves (31).
3. The low-temperature flue gas heating device after wet flue gas desulfurization according to claim 1 is characterized in that: The drainage mechanism (4) comprises a water storage tank (41) fixedly connected to the top surface of the heating cylinder (1); a first liquid pump (43) is fixedly connected to the inner wall of the water storage tank (41); an input end of the first liquid pump (43) is fixedly connected to a water outlet pipe (42); and an end of the water outlet pipe (42) away from the first liquid pump (43) is fixedly connected to the heating cylinder (1).
4. The low-temperature flue gas heating device after wet flue gas desulfurization according to claim 3 is characterized in that: The conveying mechanism (5) comprises a second liquid pump (52) fixedly connected to the inner wall of the heating cylinder (1); the output end of the second liquid pump (52) is fixedly connected to a water supply pipe (51); an end of the water supply pipe (51) away from the second liquid pump (52) is fixedly connected to the heating cylinder (1); a drainage pipe (53) is fixedly connected to the front of the water storage tank (41); and an electronic valve (54) is fixedly connected to the drainage pipe (53).
5. The low-temperature flue gas heating device after wet flue gas desulfurization according to claim 3 is characterized in that: The heating mechanism (6) comprises a heating base (61) fixedly connected to the bottom surface of the heating cylinder (1), a plurality of heating rods (62) are fixedly mounted on the bottom surface of the heating base (61), and the top ends of the heating rods (62) extend into the interior of the water storage tank (41).
6. The low-temperature flue gas heating device after wet flue gas desulfurization according to claim 3 is characterized in that: The pressure relief mechanism (7) comprises a sealing box (71) fixedly connected to the top surface of the water storage tank (41); a slide rod (72) is slidably mounted on the top surface of the sealing box (71); the bottom end of the slide rod (72) extends into the interior of the sealing box (71); a piston plate (73) is fixedly connected to the bottom end of the slide rod (72); the piston plate (73) is slidably connected to the inner wall of the sealing box (71); a spring (74) is sleeved on the slide rod (72); the bottom end of the spring (74) is fixedly connected to the top surface of the piston plate (73); and the top end of the spring (74) is fixedly connected to the inner wall of the sealing box (71).
7. The low-temperature flue gas heating device after wet flue gas desulfurization according to claim 6 is characterized in that: A gas permeable membrane (76) is fixedly connected to the bottom surface of the sealing box (71).