Tail gas dehumidification device for thermal power plant

Abstract

The invention discloses a tail gas dehumidification device for a thermal power plant, and belongs to the technical field of tail gas treatment devices.The tail gas dehumidification device comprises a dehumidification tank, a tail gas flow guide assembly and a control module, and further comprises a motor, a rotary adsorption bed, a microwave generator, a hot waste gas flow guide assembly and a cooling assembly; the motor is fixedly installed at the bottom of an inner cavity of the dehumidification tank, the rotary adsorption bed is rotationally connected to the middle of the inner cavity of the dehumidification tank, and an output shaft of the motor is fixed to the rotary adsorption bed. Combined desorption is realized through microwave irradiation and waste gas waste heat recycling, low-grade waste gas waste heat is fully utilized, dependence on high-energy-consumption equipment such as electric heating equipment is reduced, the regeneration efficiency of the adsorption bed is improved through the combined desorption mode, meanwhile, the device can work continuously, the shutdown frequency is reduced, and the energy consumption is reduced. Compared with the prior art, the operation cost of the device is obviously reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment devices, in particular to a tail gas dehumidification device for a thermal power plant. Background Art

[0002] Dehumidification is a key link in the tail gas treatment process of thermal power plants. There are some devices in the prior art to achieve tail gas dehumidification, such as: using electric heating evaporation to evaporate the water in the tail gas; using adsorption bed adsorption to achieve dehumidification, the adsorption material on the adsorption bed absorbs the water in the tail gas, thereby reducing the humidity of the tail gas; using cooling condensation to condense the water, and then remove the water through a separation device.

[0003] Several solutions in the above-mentioned prior art all have the problem of high operating costs. First, the methods of evaporation by electric heating or condensation by cooling require a large amount of electric energy; the regeneration process of the adsorption material by adsorption bed adsorption is relatively complicated, and requires a higher temperature (120-150°C), high energy consumption, and frequent shutdown and switching. The disadvantages of the above three dehumidification methods will increase the operating cost of the exhaust gas dehumidification device.

[0004] Therefore, we proposed an exhaust gas dehumidification device for thermal power plants in order to solve the above-mentioned problems.

[0005] The above information disclosed in this background technology is only used to increase the understanding of the background technology of the present invention and therefore, it may include information that does not constitute the prior art known to ordinary technicians in this field. Summary of the invention

[0006] The object of the present invention is to provide a tail gas dehumidification device for a thermal power plant, so as to solve the problem of high operating cost of the tail gas dehumidification device in the prior art mentioned in the above background technology.

[0007] To achieve the above-mentioned object, the present invention provides a tail gas dehumidification device for a thermal power plant, comprising a dehumidification tank, a tail gas guide assembly and a control module, and also comprising a motor, a rotating adsorption bed, a microwave generator, a hot exhaust gas guide assembly and a cooling assembly;

[0008] The motor is fixedly installed at the bottom of the inner cavity of the dehumidification tank, the rotating adsorption bed is rotatably connected to the middle of the inner cavity of the dehumidification tank, and the output shaft of the motor is fixed to the rotating adsorption bed;

[0009] The dehumidification tank has a first dehumidification zone, a first desorption zone and a first cooling zone above and below the rotating adsorption bed in the inner cavity, and the rotating adsorption bed has a second dehumidification zone, a second desorption zone and a second cooling zone;

[0010] The second dehumidification zone of the rotary adsorption bed is connected to the first dehumidification zone on the upper and lower sides of the rotary adsorption bed, the second desorption zone of the rotary adsorption bed is connected to the first desorption zone on the upper and lower sides of the rotary adsorption bed, and the second cooling zone of the rotary adsorption bed is connected to the first cooling zone on the upper and lower sides of the rotary adsorption bed;

[0011] The microwave generator is arranged in the inner cavity of the dehumidification tank and is located above the first desorption zone;

[0012] The tail gas guide component, the hot exhaust gas guide component and the cooling component are arranged outside the dehumidification tank, and the tail gas guide component is communicated with the first dehumidification zone, the hot exhaust gas guide component is communicated with the second desorption zone, and the cooling component is communicated with the second cooling zone;

[0013] The control module is arranged on the outer wall of the dehumidification tank and is electrically connected to the motor, the microwave generator and the cooling component.

[0014] Preferably, the dehumidification tank comprises a tank body, the inner bottom and the bottom of the tank body cavity are respectively fixedly mounted with a lower fixing plate and an upper fixing plate, the upper surface of the lower fixing plate is fixedly mounted with three groups of lower baffles, and the three groups of lower baffles are fixed to each other at one end located at the center of the tank body;

[0015] Three groups of upper baffles are fixedly mounted on the lower surface of the upper fixed plate, and the three groups of upper baffles are fixed to each other at one end located at the center of the tank body;

[0016] The rotating adsorption bed is located between the lower partition and the upper partition;

[0017] The first dehumidification zone, the first desorption zone and the first cooling zone are separated by three groups of lower baffles and three groups of upper baffles;

[0018] The motor is fixedly installed below the lower fixed plate, and the output shaft passes through the connection point of the lower partition plate and is fixed to the rotating adsorption bed. The microwave generator is arranged on the upper fixed plate, and the output end is located in the first desorption zone;

[0019] The lower partition plate and the upper partition plate are located at the same position in the vertical direction.

[0020] Preferably, the rotary adsorption bed comprises a cylindrical bed body, in which three groups of inner baffles are fixedly installed, and the three groups of inner baffles are fixed to each other at one end located at the center of the bed body;

[0021] The angle between the inner partitions is the same as the angle between the lower partitions;

[0022] The second dehumidification zone, the second desorption zone and the second cooling zone are respectively separated by three groups of internal partitions;

[0023] The second dehumidification zone, the second desorption zone and the second cooling zone are respectively fixedly installed with heat-conducting grids, and the heat-conducting grids are provided with heat pipes;

[0024] An adsorbent is provided on the upper surface of the heat-conducting grid;

[0025] Three groups of through grooves are provided on both upper and lower sides of the arc-shaped surface of the bed body, and are respectively located at the second dehumidification zone, the second desorption zone and the second cooling zone, and the through grooves are also provided with air guide holes;

[0026] The heat pipe in the second desorption zone is connected to the through groove through the air guide hole at the second desorption zone, and the through groove at the second desorption zone is connected to the hot exhaust gas guide component;

[0027] The heat pipe in the second cooling zone is connected to the through groove in the second cooling zone through the air guide hole in the second cooling zone, and the through groove in the second cooling zone is connected to the cooling component.

[0028] Preferably, the exhaust gas guide assembly includes a first input pipe and a first output pipe, both of which are fixedly mounted on the tank body, and the first input pipe is communicated with the first dehumidification zone below the bed body, and the first output pipe is communicated with the first dehumidification zone above the bed body;

[0029] The first input pipe and the first output pipe are both provided with a first control valve.

[0030] Preferably, the hot exhaust gas guide assembly includes a second input pipe and a second output pipe, both of which are fixedly mounted on the tank body and are respectively connected to the through grooves on the upper and lower sides of the curved surface of the bed body and located at the second desorption zone;

[0031] The second input pipe and the second output pipe are provided with a second control valve;

[0032] The second input pipe is provided with a filter screen;

[0033] The hot exhaust gas guide assembly also includes a ventilation pipe, one end of which is fixedly mounted on the upper fixed plate and communicated with the first desorption zone, and the other end of the ventilation pipe passes through the outside of the tank body.

[0034] Preferably, the cooling component includes a fan and a third output pipe, both of which are fixedly mounted on the tank body;

[0035] The fan is connected to a through slot located at the lower side of the curved surface of the bed and at the second cooling zone, and the third output pipe is connected to a through slot located at the upper side of the curved surface of the bed and at the second cooling zone.

[0036] Preferably, four docking grooves are provided on the inner cavity side wall of the tank body, two of which are respectively located at the connection points of the second input pipe, the second output pipe and the tank body and are connected to the second input pipe and the second output pipe, and the other two docking grooves are respectively located at the connection points of the fan, the third output pipe and the tank body and are connected to the fan and the third output pipe.

[0037] Preferably, it also includes a water guide pipe, which is fixedly mounted on the lower fixed plate and communicates with the first dehumidification zone, the first desorption zone and the first cooling zone, and the end of the water guide pipe passes through the outside of the tank body;

[0038] The water conduit is provided with a third control valve, and is electrically connected to the control module.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] (1) The present invention realizes combined desorption by microwave irradiation and waste heat recycling, making full use of the waste heat of low-grade waste gas, reducing the dependence on high-energy consumption equipment such as electric heating, and adopts a combined desorption method to improve the regeneration efficiency of the adsorption bed. At the same time, the device can work continuously and reduce the shutdown frequency. Compared with the prior art, the operating cost of the device is significantly reduced.

[0041] (2) The present invention adopts the design of the cooling component so that the heat-conducting grid in the bed can be cooled at a faster speed, so that the adsorbent can reach the working temperature at a faster speed.

[0042] (3) When the heat pipe in the present invention is connected to the hot exhaust gas guide component, the waste heat in the exhaust gas can be reused. When the heat pipe is connected to the cooling component, the residual heat in the heat conduction grid can be blown out. In this process, the dust in the heat pipe can be blown out by the fan, avoiding the problem of reduced heat conduction efficiency caused by dust accumulation therein. Therefore, the heat pipe has a certain self-cleaning ability.

[0043] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0045] Figure 2 for Figure 1 Front view of

[0046] Figure 3 for Figure 1 A three-dimensional cross-sectional view of

[0047] Figure 4 for Figure 2 Sectional view at AA in the middle;

[0048] Figure 5 for Figure 2 Sectional view at the middle BB;

[0049] Figure 6 It is a structural schematic diagram of the rotary adsorption bed of the present invention;

[0050] Figure 7 for Figure 6 Schematic diagram of the structure after hiding the adsorbent;

[0051] Figure 8 for Figure 7 Schematic diagram of the structure after hiding the heat conduction grid;

[0052] Fig. 9 for Figure 2 Sectional view at CC;

[0053] Fig.10 for Figure 2 Schematic diagram of the structure at DD in the middle;

[0054] Fig.11 It is a three-dimensional cross-sectional view of embodiment 3 of the present invention.

[0055] In the figure: 1, dehumidification tank; 2, first dehumidification zone; 3, first desorption zone; 4, first cooling zone; 5, motor; 6, rotating adsorption bed; 7, microwave generator; 8, second dehumidification zone; 9, second desorption zone; 10, second cooling zone; 11, tail gas guide assembly; 12, hot exhaust gas guide assembly; 13, cooling assembly; 14, control module; 15, water guide pipe; 16, third control valve;

[0056] 101, tank body; 102, lower fixing plate; 103, lower partition; 104, upper fixing plate; 105, upper partition; 106, docking groove;

[0057] 601, bed body; 602, inner partition; 603, through groove; 604, air guide hole; 605, heat conduction grid; 606, adsorbent; 607, heat pipe;

[0058] 1101, first input pipe; 1102, first output pipe; 1103, first control valve;

[0059] 1201, second input pipe; 1202, second output pipe; 1203, second control valve; 1204, filter screen; 1205, ventilation pipe;

[0060] 1301. Fan; 1302. Third output pipe. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. It should be pointed out that the drawings are schematic and not drawn to scale. For the sake of clarity and convenience in the figures, the relative sizes and proportions of the parts shown in the figures are exaggerated or reduced in size, and any size is only exemplary and not restrictive.

[0062] Embodiment 1:

[0063] See also Figure 1-Figure 4 ,as well as Figure 8 A tail gas dehumidification device for a thermal power plant comprises: a dehumidification tank 1, a tail gas guide assembly 11 and a control module 14, and also comprises a motor 5, a rotating adsorption bed 6, a microwave generator 7, a hot exhaust gas guide assembly 12 and a cooling assembly 13; the motor 5 is fixedly installed at the bottom of the inner cavity of the dehumidification tank 1, the rotating adsorption bed 6 is rotatably connected to the middle of the inner cavity of the dehumidification tank 1, and the output shaft of the motor 5 is fixed to the rotating adsorption bed 6; the inner cavity of the dehumidification tank 1 is provided with a first dehumidification zone 2, a first desorption zone 3 and a first cooling zone 4 above and below the rotating adsorption bed 6, and the rotating adsorption bed 6 is provided with a second dehumidification zone 8, a second desorption zone 9 and a second cooling zone 10; the second dehumidification zone 8 of the rotating adsorption bed 6 and the first desorption zone 9 on the upper and lower sides of the rotating adsorption bed 6 The dehumidification zone 2 is connected, the second desorption zone 9 of the rotary adsorption bed 6 is connected to the first desorption zone 3 on the upper and lower sides of the rotary adsorption bed 6, and the second cooling zone 10 of the rotary adsorption bed 6 is connected to the first cooling zone 4 on the upper and lower sides of the rotary adsorption bed 6; the microwave generator 7 is arranged in the inner cavity of the dehumidification tank 1, and is located above the first desorption zone 3; the exhaust gas guide component 11, the hot exhaust gas guide component 12 and the cooling component 13 are arranged outside the dehumidification tank 1, and the exhaust gas guide component 11 is connected to the first dehumidification zone 2, the hot exhaust gas guide component 12 is connected to the second desorption zone 9, and the cooling component 13 is connected to the second cooling zone 10; the control module 14 is arranged on the outer wall of the dehumidification tank 1, and is electrically connected to the motor 5, the microwave generator 7 and the cooling component 13.

[0064] When in use, the exhaust gas with moisture enters the dehumidification tank 1 through the exhaust gas guide assembly 11 and is discharged from the dehumidification tank 1. In the dehumidification tank 1, it first reaches the first dehumidification zone 2 below the rotating adsorption bed 6, and then rises to enter the second dehumidification zone 8 in the rotating adsorption bed 6 to separate the moisture. The moisture is adsorbed by the rotating adsorption bed 6, and the exhaust gas enters the first dehumidification zone 2 above the rotating adsorption bed 6, and then is discharged through the exhaust gas guide assembly 11. After the second dehumidification zone 8 in the rotating adsorption bed 6 reaches the upper limit of adsorption, the motor 5 drives the rotary adsorption bed 6 to rotate. The rotating adsorption bed 6 rotates to move the area and connect it with the first desorption zone 3. The microwave generator 7 and the hot exhaust gas guide assembly 12 are used to introduce the exhaust gas with heat into the rotating adsorption bed 6. The hot exhaust gas heating and microwave irradiation are used to achieve combined desorption. The water is evaporated by heating. After completion, the control motor 5 drives the rotating adsorption bed 6 to rotate again, so that the area on the rotating adsorption bed 6 that has completed desorption is connected with the first cooling zone 4, and the rotating adsorption bed 6 is connected with the cooling assembly 13 to achieve cooling of the rotating adsorption bed.

[0065] The second dehumidification zone 8, the second desorption zone 9 and the second cooling zone 10 of the rotating adsorption bed 6 change dynamically with the rotation of the rotating adsorption bed 6. For example, the second dehumidification zone 8 is connected with the first dehumidification zone 2 in the initial state, and is connected with the first desorption zone 3 with the rotation of the rotating adsorption bed 6. At this time, the area is transformed into the second desorption zone 9. When the area is rotated again and connected with the first cooling zone 4, it is transformed into the second cooling zone 10. In this way, the above three areas on the rotating adsorption bed 6 are cyclically used, so that the device can work continuously and can release adsorption in time.

[0066] The advantages of the above technical solution are: first, combined desorption is achieved through microwave irradiation and waste heat reuse, saving energy; second, the rotary adsorption bed can be desorbed in time after reaching the adsorption upper limit, avoiding frequent shutdowns; finally, the heated rotary adsorption bed 6 can be cooled at a relatively fast speed through the cooling component 13, making it easier to put into operation. Therefore, compared with the prior art, the operating cost of the device is significantly reduced.

[0067] See also Figure 3 and Figure 4The dehumidification tank 1 includes a tank body 101, a lower fixing plate 102 and an upper fixing plate 104 are fixedly installed at the bottom of the inner cavity and the bottom of the tank body 101, three groups of lower baffles 103 are fixedly installed on the upper surface of the lower fixing plate 102, and the three groups of lower baffles 103 are fixed to each other at one end located at the center of the tank body 101; three groups of upper baffles 105 are fixedly installed on the lower surface of the upper fixing plate 104, and the three groups of upper baffles 105 are fixed to each other at one end located at the center of the tank body 101; the rotating adsorption bed 6 is located at the lower baffle 103 and the upper partition 105; the first dehumidification zone 2, the first desorption zone 3 and the first cooling zone 4 are separated by three groups of lower partitions 103 and three groups of upper partitions 105; the motor 5 is fixedly installed below the lower fixed plate 102, and the output shaft passes through the connection point of the lower partition 103 and is fixed to the rotating adsorption bed 6, the microwave generator 7 is arranged on the upper fixed plate 104, and the output end is located in the first desorption zone 3; the lower partition 103 and the upper partition 105 are located at the same position in the vertical direction.

[0068] In the above technical solution, a rotary seal is adopted between the tank body 101 and the rotary adsorption bed 6 .

[0069] See also Figure 3 ,as well as Figure 6-Figure 8 The rotating adsorption bed 6 includes a cylindrical bed body 601, in which three groups of inner baffles 602 are fixedly installed, and the three groups of inner baffles 602 are fixed to each other at one end located at the center of the bed body 601; the angle between the inner baffles 602 is the same as the angle between the lower baffles 103; the second dehumidification zone 8, the second desorption zone 9 and the second cooling zone 10 are respectively separated by the three groups of inner baffles 602; the second dehumidification zone 8, the second desorption zone 9 and the second cooling zone 10 are respectively fixedly installed with a heat-conducting grid 605, and a heat pipe 607 is provided in the heat-conducting grid 605, and the heat pipe 607 is a hollow structure; the upper surface of the heat-conducting grid 605 is provided with an adsorbent 606; three groups of through grooves 603 are provided on the upper and lower sides of the arc-shaped surface of the bed body 601, and are respectively located at the second dehumidification zone 8, the second desorption zone 9 and the second cooling zone 10, and the through grooves 603 are also provided with air guide holes 604; the heat pipe 607 in the second desorption zone 9 is connected with the through grooves 603 through the air guide holes 604 at the second desorption zone 9, and the through grooves 603 at the second desorption zone 9 are connected with the hot exhaust gas guide component 12; the heat pipe 607 in the second cooling zone 10 is connected with the through grooves 603 at the second cooling zone 10 through the air guide holes 604 at the second cooling zone 10, and the through grooves 603 at the second cooling zone 10 are connected with the cooling component 13.

[0070] In the above technical solution, the adsorbent 606 uses common adsorption materials such as modified silica gel and molecular sieve. In addition, when the inner partition 602 is accurately docked with the lower partition 103 and the upper partition 105, a sealed state is formed, so sealing measures are taken between the inner partition 602 and the lower partition 103 and the upper partition 105. Since the bed 601 and the tank body 101 are in the form of a rotary seal, after the inner partition 602 is accurately docked with the lower partition 103 and the upper partition 105, the first dehumidification zone 2 and the second dehumidification zone 8, the first desorption zone 3 and the second desorption zone 9, and the first cooling zone 4 and the second cooling zone 10 form three independent areas, each independently completing its function to avoid interference with each other.

[0071] It should be pointed out that during the rotation of the bed 601, although the first dehumidification zone 2, the first desorption zone 3 and the first cooling zone 4 are connected, the exhaust gas containing moisture can still be normally introduced for treatment without stopping to wait for the state adjustment of the bed 601 to be completed.

[0072] In the above technical solution, the heat-conducting grid 605 is made of heat-conducting material, the bed 601 and the inner partition 602 are made of heat-insulating material, the heat-conducting grid 605 has gaps allowing gas to pass through, the heat pipe 607 is made of heat-conducting material and fits with the heat-conducting grid 605 to achieve good heat conduction.

[0073] The heat pipes 607 are selected to have a smaller diameter and are evenly distributed in the heat conduction grid 605 to make the heat conduction more uniform.

[0074] In addition, during dehumidification, after the exhaust gas enters the bed 601, it first passes through the gaps of the heat-conducting grid 605 and then passes through the adsorbent 606. During desorption, the exhaust gas with residual heat flows through the heat pipe 607, which can avoid mixing between different gases.

[0075] In the above technical solution, the reason for adopting the combined desorption by heating with the microwave generator 7 and the heat-conducting grid 605 is that the penetration depth of microwaves into the adsorbent 606 is limited, which limits the thickness of the adsorbent 606, resulting in limited adsorption capacity of the adsorbent 606. A single heating method increases energy consumption and is not conducive to the use of low-grade waste heat from exhaust gas. Therefore, the combined desorption method can increase the thickness of the adsorbent 606 and improve the upper limit of adsorption. At the same time, the low-grade waste heat from exhaust gas can be used for heating to achieve desorption.

[0076] See also Figure 2 The exhaust gas guide component 11 includes a first input pipe 1101 and a first output pipe 1102, both of which are fixedly installed on the tank body 101, and the first input pipe 1101 is connected to the first dehumidification zone 2 below the bed body 601, and the first output pipe 1102 is connected to the first dehumidification zone 2 above the bed body 601; the first input pipe 1101 and the first output pipe 1102 are both provided with a first control valve 1103.

[0077] See also Figure 3 The hot exhaust gas guide component 12 includes a second input pipe 1201 and a second output pipe 1202, both of which are fixedly installed on the tank body 101 and are respectively connected to the upper and lower sides of the arc surface of the bed body 601 and the through groove 603 located at the second desorption zone 9; the second input pipe 1201 and the second output pipe 1202 are provided with a second control valve 1203; the second input pipe 1201 is provided with a filter screen 1204, and the hot exhaust gas guide component 12 also includes a ventilation pipe 1205, one end of the ventilation pipe 1205 is fixedly installed on the upper fixed plate 104 and is connected to the first desorption zone 3, and the other end of the ventilation pipe 1205 passes through to the outside of the tank body 101.

[0078] In the above technical solution, the second input pipe 1201 and the second output pipe 1202 are connected to external equipment, and waste gas with residual heat is provided by the external equipment. The ventilation pipe 1205 is connected to an external recovery device to recover evaporated water vapor and a small amount of tail gas mixed in during the rotation of the bed 601, and then carry out subsequent treatment.

[0079] See also Figure 3 The cooling component 13 includes a fan 1301 and a third output pipe 1302, both of which are fixedly mounted on the tank body 101; the fan 1301 is connected to the through groove 603 located at the lower side of the curved surface of the bed body 601 and at the second cooling zone 10, and the third output pipe 1302 is connected to the through groove 603 located at the upper side of the curved surface of the bed body 601 and at the second cooling zone 10.

[0080] Embodiment 2:

[0081] See also Figure 9-10 On the basis of Example 1, four docking grooves 106 are opened on the inner cavity side wall of the tank body 101, two of which are respectively located at the connection points of the second input pipe 1201, the second output pipe 1202 and the tank body 101 and are connected to the second input pipe 1201 and the second output pipe 1202, and the other two docking grooves 106 are respectively located at the connection points of the fan 1301, the third output pipe 1302 and the tank body 101, and are connected to the fan 1301 and the third output pipe 1302.

[0082] In the above technical solution, the arc length of the through groove 603 is less than one sixth of the bed 601, and the size of the docking groove 106 is adapted to the through groove 603. The through groove 603 and the docking groove 106 are provided to facilitate accurate connection of various components during operation of the device.

[0083] Embodiment 3:

[0084] See also Fig.11 , and combined with Figure 3For comparison, based on Example 1, it also includes a water pipe 15, which is fixedly installed on the lower fixed plate 102, and is connected to the first dehumidification zone 2, the first desorption zone 3 and the first cooling zone 4, and the end thereof passes through the outside of the tank body 101; a third control valve 16 is provided on the water pipe 15, and is electrically connected to the control module 14.

[0085] By adopting the above technical solution, the water that falls into the tank body 101 can be discharged in time, avoiding the accumulation of water in the tank body 101, thereby improving the convenience of maintenance.

[0086] Working principle: The exhaust gas with moisture enters the dehumidification tank 1 through the exhaust gas guide component 11, and first reaches the first dehumidification zone 2 below the rotating adsorption bed 6. The exhaust gas rises and enters the second dehumidification zone 8 in the rotating adsorption bed 6, where moisture is adsorbed. The dried exhaust gas continues to rise and enters the first dehumidification zone 2 above the rotating adsorption bed 6, and is discharged through the exhaust gas guide component 11. When the rotating adsorption bed 6 reaches the upper limit of adsorption, the motor 5 drives the rotating adsorption bed 6 to rotate, so that the adsorption saturated area moves to the first desorption zone 3. In the first desorption zone 3, the microwave generator 7 generates microwaves to irradiate the rotating adsorption bed 6, and at the same time, the hot exhaust gas guide component 12 introduces the exhaust gas with heat. Through the combined effect of hot exhaust gas heating and microwave irradiation, the moisture in the rotating adsorption bed 6 evaporates to achieve desorption. After desorption is completed, the motor 5 drives the rotating adsorption bed 6 to rotate again, so that the desorbed area moves to the first cooling zone 4. The cooling component 13 cools the rotating adsorption bed 6 to restore it to a suitable adsorption temperature to prepare for the next round of adsorption. The control module 14 is disposed on the outer wall of the dehumidification tank 1 and is electrically connected to the motor 5 , the microwave generator 7 and the cooling component 13 to realize automatic control of the entire process.

[0087] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0088] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0089] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" 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 present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0092] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0093] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tail gas dehumidification device for a thermal power plant, comprising a dehumidification tank (1), a tail gas flow guide component (11) and a control module (14), characterized in that: It also includes a motor (5), a rotating adsorption bed (6), a microwave generator (7), a hot exhaust gas guide component (12) and a cooling component (13); The motor (5) is fixedly mounted at the bottom of the inner cavity of the dehumidification tank (1), the rotating adsorption bed (6) is rotatably connected to the middle of the inner cavity of the dehumidification tank (1), and the output shaft of the motor (5) is fixed to the rotating adsorption bed (6); A first dehumidification zone (2), a first desorption zone (3) and a first cooling zone (4) are provided in the inner cavity of the dehumidification tank (1) above and below the rotating adsorption bed (6); and the rotating adsorption bed (6) is provided with a second dehumidification zone (8), a second desorption zone (9) and a second cooling zone (10); The second dehumidification zone (8) of the rotating adsorption bed (6) is connected to the first dehumidification zone (2) on the upper and lower sides of the rotating adsorption bed (6), the second desorption zone (9) of the rotating adsorption bed (6) is connected to the first desorption zone (3) on the upper and lower sides of the rotating adsorption bed (6), and the second cooling zone (10) of the rotating adsorption bed (6) is connected to the first cooling zone (4) on the upper and lower sides of the rotating adsorption bed (6); The microwave generator (7) is arranged in the inner cavity of the dehumidification tank (1) and is located above the first desorption zone (3); The exhaust gas guide component (11), the hot exhaust gas guide component (12) and the cooling component (13) are arranged outside the dehumidification tank (1), and the exhaust gas guide component (11) is connected to the first dehumidification zone (2), the hot exhaust gas guide component (12) is connected to the second desorption zone (9), and the cooling component (13) is connected to the second cooling zone (10); The control module (14) is arranged on the outer wall of the dehumidification tank (1) and is electrically connected to the motor (5), the microwave generator (7) and the cooling component (13).

2. The tail gas dehumidification device for a thermal power plant according to claim 1, characterized in that: The dehumidification tank (1) comprises a tank body (101), wherein a lower fixing plate (102) and an upper fixing plate (104) are fixedly mounted at the bottom of the inner cavity and the bottom of the tank body (101), respectively, and three groups of lower baffles (103) are fixedly mounted on the upper surface of the lower fixing plate (102), and the three groups of lower baffles (103) are fixedly mounted at one end of the center of the tank body (101) and are fixed to each other; Three groups of upper baffles (105) are fixedly mounted on the lower surface of the upper fixed plate (104), and the three groups of upper baffles (105) are fixed to each other at one end located at the center of the tank body (101); The rotating adsorption bed (6) is located between the lower partition (103) and the upper partition (105); The first dehumidification zone (2), the first desorption zone (3) and the first temperature reduction zone (4) are separated by three groups of lower baffles (103) and three groups of upper baffles (105); The motor (5) is fixedly mounted below the lower fixed plate (102), and the output shaft passes through the connection point of the lower partition (103) and is fixed to the rotating adsorption bed (6); the microwave generator (7) is arranged on the upper fixed plate (104), and the output end is located in the first desorption zone (3); The lower partition (103) and the upper partition (105) are located at the same position in the vertical direction.

3. The tail gas dehumidification device for a thermal power plant according to claim 2, characterized in that: The rotating adsorption bed (6) comprises a cylindrical bed body (601), three groups of inner baffles (602) are fixedly installed in the cylindrical bed body (601), and the three groups of inner baffles (602) are fixed to each other at one end located at the center of the bed body (601); The included angle between the inner partitions (602) is the same as the included angle between the lower partitions (103); The second dehumidification zone (8), the second desorption zone (9) and the second cooling zone (10) are respectively divided by three groups of internal partitions (602); A heat-conducting grid (605) is fixedly installed in each of the second dehumidification zone (8), the second desorption zone (9) and the second cooling zone (10), and a heat pipe (607) is provided in the heat-conducting grid (605); An adsorbent (606) is provided on the upper surface of the heat-conducting grid (605); Three groups of through grooves (603) are provided on both upper and lower sides of the arc-shaped surface of the bed body (601), and are respectively located at the locations of the second dehumidification zone (8), the second desorption zone (9) and the second cooling zone (10), and the through grooves (603) are also provided with air guide holes (604); The heat pipe (607) in the second desorption zone (9) is connected to the through groove (603) through the air guide hole (604) at the second desorption zone (9), and the through groove (603) at the second desorption zone (9) is connected to the hot exhaust gas guide component (12); The heat pipe (607) in the second cooling zone (10) is connected to the through groove (603) at the second cooling zone (10) through the air guide hole (604) at the second cooling zone (10), and the through groove (603) at the second cooling zone (10) is connected to the cooling component (13).

4. The tail gas dehumidification device for a thermal power plant according to claim 3, characterized in that: The exhaust gas guide assembly (11) comprises a first input pipe (1101) and a first output pipe (1102), both of which are fixedly mounted on the tank body (101), and the first input pipe (1101) is connected to the first dehumidification zone (2) below the bed body (601), and the first output pipe (1102) is connected to the first dehumidification zone (2) above the bed body (601); The first input pipe (1101) and the first output pipe (1102) are both provided with a first control valve (1103).

5. The tail gas dehumidification device for a thermal power plant according to claim 3, characterized in that: The hot exhaust gas guide assembly (12) comprises a second input pipe (1201) and a second output pipe (1202), both of which are fixedly mounted on the tank body (101) and are respectively connected to the upper and lower sides of the arc-shaped surface of the bed body (601) and the through groove (603) located at the second desorption zone (9); The second input pipe (1201) and the second output pipe (1202) are provided with a second control valve (1203); The second input pipe (1201) is provided with a filter screen (1204); The hot exhaust gas guide assembly (12) also includes a ventilation pipe (1205), one end of which is fixedly mounted on the upper fixed plate (104) and communicated with the first desorption zone (3), and the other end of which passes through the outside of the tank body (101).

6. The tail gas dehumidification device for a thermal power plant according to claim 3, characterized in that: The cooling component (13) comprises a fan (1301) and a third output pipe (1302), both of which are fixedly mounted on the tank body (101); The fan (1301) is connected to the through groove (603) located at the lower side of the curved surface of the bed (601) and at the second cooling zone (10), and the third output pipe (1302) is connected to the through groove (603) located at the upper side of the curved surface of the bed (601) and at the second cooling zone (10).

7. The tail gas dehumidification device for a thermal power plant according to claim 6, characterized in that: The inner cavity side wall of the tank body (101) is provided with four docking grooves (106), of which two docking grooves (106) are respectively located at the connection points between the second input pipe (1201), the second output pipe (1202) and the tank body (101), and are in communication with the second input pipe (1201) and the second output pipe (1202), and the other two docking grooves (106) are respectively located at the connection points between the fan (1301), the third output pipe (1302) and the tank body (101), and are in communication with the fan (1301) and the third output pipe (1302).

8. The tail gas dehumidification device for a thermal power plant according to claim 2, characterized in that: It also includes a water guide pipe (15), which is fixedly mounted on the lower fixed plate (102), is connected to the first dehumidification zone (2), the first desorption zone (3) and the first cooling zone (4), and has an end extending out of the tank body (101); The water conduit (15) is provided with a third control valve (16) and is electrically connected to the control module (14).

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