Efficient coal-fired flue gas catalytic demercuration equipment

Abstract

The invention relates to the technical field of demercuration equipment, and discloses efficient coal-fired flue gas catalytic demercuration equipment which comprises a first treatment device used for conducting demercuration treatment on particulate mercury, a second treatment device used for conducting oxidation treatment on zero-valent mercury and a third treatment device used for conducting demercuration treatment on divalent mercury. The third treatment device comprises a tank body, a containing groove is formed in the upper end face of the tank body, a cover body for sealing the containing groove is arranged above the tank body, an air inlet pipe communicated with the containing groove is connected to the outside of the tank body, an air outlet pipe communicated with the containing groove is arranged on the cover body, and a storage frame is arranged in the containing groove. The storage frame can be filled with activated carbon particles, a locking structure for limiting movement of the storage frame is arranged on the tank body, and the effect of conveniently replacing activated carbon is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of mercury removal equipment, and in particular to a high-efficiency catalytic mercury removal equipment for coal-fired flue gas. Background Art

[0002] Mercury is one of the strongest heavy metal elements in the environment. Humans emit a large amount of mercury into the atmosphere every year, and the main sources of mercury come from coal combustion, ore smelting, etc. In order to control the emission of mercury from coal combustion, the country has increasingly higher requirements for the emission of mercury. The mercury in the existing coal-fired flue gas has three forms: divalent mercury (Hg 2+ ), zero-valent mercury (Hg 0 ) and particulate mercury (Hg p ).

[0003] In the related art, a coal-fired flue gas mercury removal device comprises a tank body, and the bottom wall of the tank body is stacked with activated carbon, which can adsorb part of the mercury in the flue gas.

[0004] After the existing coal-fired flue gas mercury removal equipment has been used for a period of time, the adsorption efficiency of the activated carbon decreases as the material adsorbed by the activated carbon moves. Workers are required to shovel out the activated carbon in the tank and then transport new activated carbon into the tank. The above method of replacing activated carbon is relatively laborious. Summary of the invention

[0005] In order to improve the difficulty of replacing activated carbon, the present application provides a high-efficiency coal-fired flue gas catalytic mercury removal device.

[0006] The present application provides a highly efficient catalytic mercury removal device for coal-fired flue gas, which adopts the following technical solution: A high-efficiency catalytic demercuration device for coal-fired flue gas comprises a first treatment device for demercuration of particulate mercury, a second treatment device for oxidation treatment of zero-valent mercury and a third treatment device for demercuration of divalent mercury; the third treatment device comprises a tank body, the upper end surface of the tank body is provided with a receiving groove, a cover body for sealing the receiving groove is arranged above the tank body, an air inlet pipe connected to the receiving groove is connected to the outside of the tank body, an air outlet pipe connected to the receiving groove is arranged on the cover body, a storage frame is arranged in the receiving groove, activated carbon particles can be filled in the storage frame, and a locking structure for limiting the movement of the storage frame is arranged on the tank body.

[0007] By adopting the above technical scheme, particulate mercury is first removed by the first treatment device, and then the zero-valent mercury is oxidized into divalent mercury by the second treatment device, and then the divalent mercury is removed by the third treatment device, thereby improving the removal effect in the flue gas; when the activated carbon needs to be replaced, the cover body is separated from the tank body, and then the storage frame and the activated carbon are driven to rise, and the storage frame is taken out of the containing tank. The staff can pour out the activated carbon in the storage frame and replace the new activated carbon into the storage frame, and then install the storage frame and the new activated carbon into the tank body to complete the activated carbon replacement action, which has the advantage of facilitating the replacement of activated carbon.

[0008] Optionally, an operating ring groove surrounding the accommodating groove is formed on the upper end surface of the tank body, the operating ring groove is connected to the accommodating groove, an operating groove is formed on the bottom wall of the operating ring groove, the storage frame includes a supporting ring block located in the operating ring groove, the locking structure includes a locking rod vertically slidably arranged in the operating groove, a side surface of the locking rod is provided with an elastic locking hook, a through hole is formed on the lower end surface of the supporting ring block for the locking rod and the locking hook to pass through, the locking hook can be hooked and cooperated with the supporting ring block, and a lifting structure for realizing the lifting and lowering of the locking rod is provided between the storage frame and the tank body.

[0009] By adopting the above technical solution, the lifting structure drives the locking rod to rise, so that the locking hook abuts against the supporting ring block. As the locking rod continues to rise, the locking hook is deformed, and then the locking hook is reset after passing through the through hole so that the locking hook abuts against the upper end surface of the supporting ring block, thereby locking the storage frame and the tank body, making it difficult for the storage frame to shift position due to vibration during the operation of the third processing device; the storage frame is prevented from being opened by unauthorized personnel at will, improperly operating the storage frame or interfering with the normal operation of the equipment, thereby ensuring the stability and long-term reliability of the equipment.

[0010] Optionally, a circular hole is formed on the inner wall of the operating groove away from the vertical central axis of the tank body, and the lifting structure includes a round rod passing through the circular hole, a second rack arranged below the supporting ring block, and a first rack vertically slidably arranged in the operating groove; a linkage gear located in the operating groove is connected to the outer shell of the round rod, the first rack is meshed with the linkage gear, the first rack is fixedly connected to the lower end face of the locking rod, and the second rack is located on the side of the linkage gear away from the first rack, and the second rack can mesh with the linkage gear.

[0011] By adopting the above technical solution, when the storage frame is installed in the tank body, the second rack is inserted into the operating groove and meshes with the linkage gear, and the second rack drives the linkage gear to rotate. Since the first rack meshes with the linkage gear, the linkage gear drives the first rack to rise, so that the locking hook is hooked and matched with the supporting ring block; with the help of the structure of the first rack, the linkage gear and the second rack on the supporting ring block, the locking action of the supporting ring block and the locking hook is realized, and there is no need for the staff to perform the locking operation, which reduces the steps required for locking and saves time and effort.

[0012] Optionally, the tank body is provided with an unlocking component for releasing the lock of the lock hook and the support ring block, and an arc-shaped groove is provided on the outer circumferential surface of the tank body. The unlocking component includes an active magnetic block slidably arranged in the groove and a driven magnetic block slidably arranged above the support ring block, and the active magnetic block can be magnetically matched with the driven magnetic block; when the lock hook is hooked and matched with the support ring block, the driven magnetic block can drive the lock hook to no longer contact the support ring block.

[0013] By adopting the above technical solution, the active magnetic block is driven to move horizontally. Due to the magnetic attraction cooperation between the active magnetic block and the driven magnetic block, the active magnetic block drives the driven magnetic block to move, so that the driven magnetic block drives the lock hook to deform, so that the lock hook no longer abuts against the upper end surface of the supporting ring block, thereby releasing the lock between the storage frame and the tank body, making it convenient for subsequent staff to take the storage frame out of the tank body.

[0014] Optionally, the locking structure and the lifting structure are both provided with multiple locking structures, and the multiple locking structures are distributed in a circumferential array along the tank body. The tank body is provided with a linkage assembly for synchronously rotating multiple round rods. The linkage assembly includes a second bevel gear sleeved outside the tank body and a first bevel gear sleeved outside the round rod, and the first bevel gear is meshed with the second bevel gear.

[0015] By adopting the above technical solution, one of the first bevel gears is driven to rotate. Since the first bevel gear is meshed with the second bevel gear, the first bevel gear drives the second bevel gear to rotate, and the second bevel gear drives the other first bevel gears to rotate, so that all the first bevel gears rotate synchronously, thereby realizing the synchronous action of all lifting structures.

[0016] Optionally, a detection device for detecting the mercury content in the gas is provided on the outlet pipe, a reflux pipe is provided on the outlet pipe, one end of the reflux pipe away from the outlet pipe is connected to the tank body, a valve is provided at the end of the outlet pipe, and the detection device is electrically connected to a controller on the valve.

[0017] By adopting the above technical solution, when the mercury content in the flue gas in the outlet pipe is higher than the preset value of the detection equipment, the valve is in a closed state, allowing the flue gas to return to the tank body; when the mercury content in the flue gas in the outlet pipe is lower than or equal to the preset value of the detection equipment, the controller drives the valve to open and output the flue gas, making the treated flue gas emission more environmentally friendly.

[0018] Optionally, the first processing device includes a horizontally placed fixed cylinder, a first fixed cover is provided at one end of the fixed cylinder, a first fixed pipe for air intake is provided on the side of the first fixed cover away from the fixed cylinder, a second fixed cover is provided at the other end of the fixed cylinder, a second fixed pipe for air outlet is provided on the side of the second fixed cover away from the fixed cylinder, a fixed rod is provided in the fixed cylinder, a threaded fixed sheet is provided on the outer circumferential surface of the fixed rod, a surface of the fixed sheet away from the axis of the fixed rod is fixedly connected to the inner wall of the fixed cylinder, the fixed sheet, the surface of the fixed rod and the inner wall of the fixing hole enclose a spiral channel, and a spiral filter bag is provided in the spiral channel.

[0019] By adopting the above technical solution, the flue gas enters the fixed cylinder from the first fixed pipe, and then enters the filter bag of the spiral channel. The flue gas contacts the filter bag, so that the particulate mercury in the flue gas is adsorbed on the filter bag, and the particulate mercury in the flue gas is removed.

[0020] Optionally, the fixing plate includes an insulating section and a conductive section along the gas conveying direction, the filter bag is located in a spiral channel of the insulating section, and the conductive section is connected to a power source via an electric wire.

[0021] By adopting the above technical solution, the conductive segment is energized to generate a high-voltage electrostatic field. The high-voltage electrostatic field causes the particles in the flue gas to be charged, and the particulate mercury in the flue gas is deposited on the surface of the conductive segment, thereby removing the particulate mercury in the flue gas. At the same time, the particulate mercury is removed by energizing the filter bag and the conductive segment, thereby improving the mercury removal efficiency.

[0022] Optionally, the filter bag includes a spiral rod located in the spiral channel, one end of the spiral rod along the length direction is connected to a mounting frame, the mounting frame is provided with a cleaning component capable of cleaning the fixed plate, the cleaning component includes a mounting ring block arranged on a side of the mounting frame away from the spiral rod, the mounting ring block is provided with a mounting rod on one side along the axis of the fixed rod, and the mounting rod is provided with bristles capable of abutting against the surface of the fixed plate on the side away from the mounting ring block.

[0023] By adopting the above technical solution, the filter bag is driven to move in the spiral channel, so that the bristles clean the surface of the fixed plate, thereby improving the performance of the conductive section in removing mercury next time; the filter bag cleans the fixed plate so that the filter bag has a cleaning function, thereby improving the functionality of the filter bag.

[0024] Optionally, the second processing device includes a reaction box, a reaction chamber is defined in the reaction box, the second fixed tube is connected to the reaction chamber, a reaction box is provided on the lower inner wall of the reaction chamber, a storage chamber is defined in the reaction box, a storage chamber is defined in the reaction box, the storage chamber is filled with potassium persulfate powder, an air inlet connected to the second fixed tube is defined on the reaction box, an air outlet connected to the storage chamber is defined on the upper end surface of the reaction box, and an ultraviolet lamp is provided on the top of the reaction chamber.

[0025] By adopting the above technical solution, the flue gas enters the storage chamber after passing through the second fixed pipe and the air inlet, so that the potassium persulfate oxidizes the zero-valent mercury in the flue gas into divalent mercury, which is convenient for the subsequent flue gas to enter the third reaction device for mercury removal process; ultraviolet light irradiates the potassium persulfate to excite the electrons in the potassium persulfate molecules, which is beneficial to the decomposition of potassium persulfate and the generation of atomic oxygen, thereby improving its oxidation ability, accelerating the oxidation effect on zero-valent mercury, reducing the content of zero-valent mercury in the flue gas, and improving the performance of subsequent mercury removal.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. First, the particulate mercury is removed by the first treatment device, and then the zero-valent mercury is oxidized into divalent mercury by the second treatment device, and then the divalent mercury is removed by the third treatment device, so as to improve the removal effect in the flue gas; when the activated carbon needs to be replaced, the cover body is separated from the tank body, and then the storage frame and the activated carbon are driven to rise, and the storage frame is taken out from the containing tank. The staff can pour out the activated carbon in the storage frame and replace the new activated carbon into the storage frame, and then install the storage frame and the new activated carbon into the tank body to complete the activated carbon replacement action, which has the advantage of facilitating the replacement of activated carbon; 2. The filter bag has the function of adsorbing particulate mercury in the flue gas, and driving the filter bag to move in the spiral channel so that the bristles clean the surface of the fixed plate, thereby improving the functionality of the filter bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is a cross-sectional view highlighting the internal structure of the fixed cylinder; Figure 3 yes Figure 2 A magnified schematic diagram of part A; Figure 4 is a top view of an embodiment; Figure 5 is along Figure 4 Sectional view along the midline BB; Figure 6 is along Figure 4 Partial cross-sectional view of the CC line; Figure 7 is a partial cross-sectional view highlighting the unlocking component.

[0029] Figure numerals: 1, first treatment device; 11, fixed cylinder; 111, fixed hole; 12, first fixed cover; 13, second fixed cover; 14, fixed rod; 15, fixed sheet; 151, insulating section; 152, conductive section; 153, wire; 16, filter bag; 161, spiral rod; 162, mounting frame; 163, bag body; 17, first fixed tube; 18, second fixed tube; 19, cleaning assembly; 191, mounting ring block; 192, mounting rod; 193, brush; 194, first mounting bar; 195, second mounting bar; 2, second treatment device; 21, reaction box; 211, reaction chamber; 22, ultraviolet lamp; 23, reaction box; 231, storage chamber; 232, air inlet; 233, air outlet; 3, third treatment device; 31. Tank body; 311. Receiving groove; 312. Operating ring groove; 313. Operating groove; 314. Round hole; 315. Slide groove; 32. Cover body; 33. Storage frame; 331. Support ring block; 3311. Perforation; 332. Frame body; 34. Inlet pipe; 35. Outlet pipe; 36. Return pipe; 37. Testing equipment; 38. Valve; 4. Locking structure; 41. Locking rod; 42. Lock hook; 43. Lifting structure; 431. Round rod; 432. Linkage gear; 433. First rack; 434. Second rack; 44. Unlocking assembly; 441. Active magnetic block; 442. Driven magnetic block; 443. Drive ring; 45. Linkage assembly; 451. First bevel gear; 452. Second bevel gear; 453. Support plate; 454. Motor. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-7 This application is described in further detail.

[0031] This embodiment discloses a highly efficient catalytic mercury removal device for coal-fired flue gas. Figure 1 , a high-efficiency catalytic mercury removal device for coal-fired flue gas, including a first treatment device 1, a second treatment device 2 and a third treatment device 3.

[0032] Reference Figure 1 and Figure 2The first treatment device 1 is used for removing mercury from particulate mercury in flue gas. The first treatment device 1 comprises a fixing cylinder 11 , a first fixing cover 12 , a second fixing cover 13 , a fixing rod 14 , a fixing sheet 15 and a filter bag 16 .

[0033] Reference Figure 1 and Figure 2 The fixing tube 11 is placed horizontally. A fixing hole 111 is provided on the end surface of the fixing tube 11. The first fixing cover 12 is arranged on one side of the fixing tube 11, and the second fixing cover 13 is arranged on the other side of the fixing tube 11.

[0034] Reference Figure 1 and Figure 2 The end surface of the first fixed cover 12 away from the fixed cylinder 11 is fixedly connected with a first fixed pipe 17, and the first fixed pipe 17 is used to transport smoke into the fixed cylinder 11. The end surface of the second fixed pipe 18 away from the fixed cylinder 11 is fixedly connected with a second fixed pipe 18, and the second fixed pipe 18 is used to output the smoke in the fixed cylinder 11. The second fixed pipe 18 is provided with a valve body for opening and closing the internal channel of the second fixed pipe 18.

[0035] Reference Figure 2 and Figure 3 , the fixing rod 14 is arranged in the fixing hole 111. The fixing plate 15 is in the shape of a spiral plate, the inner side of the fixing plate 15 is fixedly connected to the outer circumferential surface of the fixing rod 14, and the outer side of the fixing plate 15 is fixedly connected to the inner wall of the fixing hole 111. The surfaces of the fixing plate 15 and the fixing rod 14 and the inner wall of the fixing hole 111 enclose a spiral channel. The fixing plate 15 includes an insulating section 151 and a conductive section 152, and the insulating section 151 is located on the side of the conductive section 152 close to the first fixing cover 12.

[0036] Reference Figure 1 and Figure 2 The conductive segment 152 is connected to a power source through a wire 153 . When the conductive segment 152 is energized, a high-voltage electrostatic field is generated in the conductive segment 152 , so that the high-voltage electrostatic field deposits particulate mercury in the flue gas on the surface of the conductive segment 152 .

[0037] Reference Figure 2 and Figure 3 The filter bag 16 is spiral-shaped and is disposed in the spiral channel at the insulating section 151. The filter bag 16 includes a spiral rod 161, a mounting frame 162 and a bag body 163. Two mounting frames 162 are provided, and the surfaces of the fixing sheet 15, the spiral rod 161 and the inner wall of the fixing hole 111 are all in contact with the mounting frame 162. The periphery of the mounting frame 162 has an elastic layer, and the surface of the fixing sheet 15 abuts against the elastic layer.

[0038] Reference Figure 2 and Figure 3Four spiral rods 161 are provided, one end of the spiral rod 161 is connected to the installation frame 162 , and the other end of the spiral rod 161 is connected to another installation frame 162 .

[0039] Reference Figure 2 and Figure 3 One end of the bag body 163 is connected to the installation frame 162, and the other end of the bag body 163 is connected to another installation frame 162. The four spiral rods 161 are all connected to the bag body 163.

[0040] Reference Figure 2 and Figure 3 A cleaning assembly 19 is disposed on the mounting frame 162 away from the first fixing cover 12 , and the cleaning assembly 19 can clean the surface of the fixing sheet 15 .

[0041] Reference Figure 3 The cleaning assembly 19 includes a mounting ring block 191, a mounting rod 192, bristles 193, a first mounting strip 194 and a second mounting strip 195. The mounting ring block 191 is fixedly connected to the end surface of the mounting frame 162 away from the first fixed cover 12.

[0042] Reference Figure 3 The mounting ring block 191 has mounting grooves on both end surfaces along the axis of the fixing rod 14. Two mounting rods 192 are provided, one of which is located on the side of the mounting ring block 191 close to the first fixing cover 12, and the other is located on the side of the mounting ring block 191 close to the second fixing cover 13.

[0043] Reference Figure 3 The mounting rod 192 is fixedly connected with a mounting block on one side facing the mounting groove, and the mounting block is inserted into the mounting groove. The bristles 193 are fixedly connected with the end face of the mounting rod 192 away from the mounting block, and the bristles 193 can abut against the fixing sheet 15.

[0044] Reference Figure 3 The first mounting strip 194 and the second mounting strip 195 are both fixedly connected to the end surface of the mounting frame 162 facing the mounting ring block 191. The first mounting strip 194 is located on the side of the mounting ring block 191 away from the fixing rod 14, and the first mounting strip 194 is in contact with the inner wall of the fixing hole 111.

[0045] Reference Figure 3 The second mounting strip 195 is located on one side of the mounting ring block 191 close to the fixing rod 14, and the first mounting strip 194 is in contact with the surface of the fixing rod 14. The filter bag 16 is driven to move in the spiral channel, and the bristles 193 can clean the fixing sheet 15.

[0046] Reference Figure 4 and Figure 5The second treatment device 2 is used for oxidizing the zero-valent mercury in the flue gas to remove the mercury. The second treatment device 2 includes a reaction box 21, an ultraviolet lamp 22 and a reaction box 23.

[0047] Reference Figure 5 A reaction chamber 211 is provided in the reaction box 21, and the second fixed tube 18 is connected to the reaction box 21. The ultraviolet lamp 22 is fixedly connected to the upper end surface of the reaction chamber 211.

[0048] Reference Figure 5 The reaction box 23 is arranged on the lower inner wall of the reaction chamber 211, and a storage chamber 231 is provided in the reaction box 23. The storage chamber 231 is filled with potassium persulfate powder. An air inlet 232 is provided on the side wall of the reaction box 23, one end of the air inlet 232 is connected to the second fixed pipe 18, and the other end of the air inlet 232 is connected to the storage chamber 231. An air outlet 233 is provided on the upper end surface of the reaction box 23, and the air outlet 233 is connected to the storage chamber 231.

[0049] Reference Figure 5 and Figure 6 The third treatment device 3 is used for removing the divalent mercury in the flue gas. The third treatment device 3 comprises a tank body 31 , a cover body 32 , a storage frame 33 , an air inlet pipe 34 , an air outlet pipe 35 and a reflux pipe 36 .

[0050] Reference Figure 5 and Figure 6 The upper end surface of the tank body 31 is provided with a receiving groove 311 and an operating ring groove 312, the operating ring groove 312 is arranged around the receiving groove 311, and the operating ring groove 312 is communicated with the receiving groove 311. The air inlet pipe 34 is connected to the outer circumferential surface of the tank body 31, and one end of the air inlet pipe 34 away from the tank body 31 is communicated with the reaction box 21. The air inlet pipe 34 is provided with a valve body for opening and closing the internal channel of the air inlet pipe 34.

[0051] Reference Figure 5 and Figure 6 The storage frame 33 includes a support ring block 331 and a frame body 332, and the frame body 332 is fixedly connected to the lower end surface of the support ring block 331. The support ring block 331 can be inserted into the operation ring groove 312. The frame body 332 can be filled with activated carbon particles, and a ventilation hole is opened at the bottom of the frame body 332.

[0052] Reference Figure 5 and Figure 6 The tank body 31 is provided with four locking structures 4, which are arranged in an array around the axis of the tank body 31. The locking structures 4 are used to limit the movement of the storage frame 33. The bottom wall of the operating ring groove 312 is provided with four operating grooves 313, which are arranged in an array around the axis of the tank body 31.

[0053] Reference Figure 6 and Figure 7 The locking structure 4 includes a locking rod 41, a locking hook 42 and a lifting structure 43. The locking rod 41 is vertically slidably arranged in the operating groove 313. The locking hook 42 is fixedly connected to the locking rod 41 along the circumferential side wall of the tank body 31. The locking hook 42 is elastic. A through hole 3311 is provided on the lower end surface of the support ring block 331, and the through hole 3311 can allow the locking hook 42 and the locking rod 41 to pass through. The locking hook 42 can be hooked and matched with the support ring block 331.

[0054] Reference Figure 6 and Figure 7 The lifting structure 43 is used to realize the lifting of the locking rod 41. The lifting structure 43 includes a round rod 431, a gear 432, a first rack 433 and a second rack 434.

[0055] Reference Figure 5 and Figure 6 A circular hole 314 is formed on the inner wall of the operation slot 313 away from the vertical center axis of the tank body 31. A round rod 431 is rotatably connected to the round hole 314, one end of the round rod 431 is inserted into the operation slot 313, and the other end of the fixed rod extends out of the tank body 31. A gear 432 is sleeved on the outside of the round rod 431, and the gear 432 is located in the operation slot 313.

[0056] Reference Figure 5 and Figure 6 The first rack 433 slides vertically in the operating slot 313. The first rack 433 is located on the side of the gear 432 close to the locking rod 41, and the first rack 433 is meshed with the gear 432. The upper end surface of the first rack 433 is fixedly connected to the lower end surface of the locking rod 41.

[0057] Reference Figure 5 and Figure 6 The second rack 434 is located on the side of the gear 432 away from the first rack 433, and the second rack 434 is fixedly connected to the lower end surface of the support ring block 331. The second rack 434 can be inserted into the operating groove 313, and the second rack 434 can mesh with the gear 432.

[0058] Reference Figure 6 and Figure 7 The tank body 31 is provided with an unlocking assembly 44, which is used to unlock the lock hook 42 and the support ring block 331. The unlocking assembly 44 includes an active magnetic block 441, a driven magnetic block 442 and a driving ring 443.

[0059] Reference Figure 6 and Figure 7 The driven magnetic block 442 is slidably disposed on the upper end surface of the supporting ring block 331 , and the driven magnetic block 442 can drive the locking hook 42 to no longer contact the upper end surface of the supporting ring block 331 .

[0060] Reference Figure 7The outer circumferential surface of the tank body 31 is provided with a slide groove 315, and the slide groove 315 is an arc-shaped groove. The driving ring 443 is sleeved outside the tank body 31. The active magnetic block 441 is fixedly connected to the end surface of the driving ring 443, and the active magnetic block 441 is slidably arranged in the slide groove 315. The active magnetic block 441 and the driven magnetic block 442 can be magnetically matched.

[0061] Reference Figure 6 and Figure 7 The tank body 31 is provided with a linkage assembly 45, which can make the four round rods 431 rotate synchronously. The linkage assembly 45 includes a first bevel gear 451, a second bevel gear 452, a support plate 453 and a motor 454. The first bevel gear 451 is sleeved on the outside of the round rod 431. The second bevel gear 452 is sleeved on the outside of the tank body 31, and the second bevel gear 452 is rotatably connected to the tank body 31, and the first bevel gear 451 is meshed with the second bevel gear 452.

[0062] Reference Figure 6 and Figure 7 The support plate 453 is fixedly connected to the outer circumferential surface of the tank body 31 , and the support plate 453 is located below the second bevel gear 452 . The motor 454 is fixedly connected to the upper end surface of the support plate 453 , and the output shaft of the motor 454 is connected to the round rod 431 .

[0063] Reference Figure 1 and Figure 6 The cover 32 is arranged on the upper end surface of the tank 31, and the air outlet pipe 35 is fixedly connected to the end surface of the cover 32 away from the cover 32. The air outlet pipe 35 is provided with a detection device 37, which is used to detect the mercury content in the flue gas and compare the detection data with the comparator in the detection device 37.

[0064] Reference Figure 1 and Figure 5 A valve 38 is provided at the end of the outlet pipe 35, and a controller is provided on the valve 38, and the controller is electrically connected to the comparator. A return pipe 36 is provided on the outlet pipe 35, and the return pipe 36 is fixedly connected to the outer circumference of the tank body 31, and the connection between the return tank and the tank body 31 is located below the storage frame 33. A conveying device is provided on the return pipe 36, and the conveying device is used to re-transport the smoke in the outlet pipe 35 to the tank body 31.

[0065] Reference Figure 1 and Figure 5 When the mercury content in the flue gas detected by the detection device 37 is higher than the preset value of the detection device 37, the valve 38 is closed, so that the flue gas is provided to the reflux pipe 36 and returns to the tank body 31. When the mercury content in the flue gas detected by the detection device 37 is not higher than the preset value of the detection device 37, the detection device 37 sends a signal to the controller, so that the controller drives the valve 38 to open and discharge the flue gas.

[0066] The implementation principle of the high-efficiency catalytic mercury removal device for coal-fired flue gas in the embodiment of the present application is as follows: first, the cover body 32 is separated from the tank body 31, and then the driving ring 443 is driven to rotate, so that the active magnetic block 441 moves in the slide groove 315, and the active magnetic block 441 and the driven magnetic block 442 are magnetically attracted to cooperate, and the active magnetic block 441 drives the driven magnetic block 442 to move, and the driven magnetic block 442 drives the lock hook 42 to deform, so that the lock hook 42 no longer contacts the upper end surface of the support ring block 331, and then the motor 454 drives the round rod 431, the first A bevel gear 451 and a gear 432 rotate, and the first bevel gear 451 drives the other first bevel gears 451 and the other gears 432 to rotate through the second bevel gear 452. The gear 432 drives the first rack 433, the locking rod 41 and the locking hook 42 to descend. At the same time, the gear 432 drives the second rack 434 and the supporting ring block 331 to rise, so that the storage frame 33 extends out of the accommodating groove 311, which is convenient for the staff to separate the storage frame 33 from the tank body 31 and replace the activated carbon inside the storage frame 33.

[0067] On the contrary, the storage frame 33 is installed in the tank body 31, and the storage frame 33 descends to cause the second rack 434 to descend synchronously. The second rack 434 drives the first rack 433, the locking rod 41 and the locking hook 42 to rise through the gear 432, so that the locking hook 42 is hooked and matched with the storage frame 33, and the cover body 32 is reinstalled on the tank body 31.

[0068] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0069] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. A highly efficient catalytic mercury removal device for coal-fired flue gas, characterized by: The invention comprises a first treatment device (1) for removing mercury from particulate mercury, a second treatment device (2) for oxidizing zero-valent mercury, and a third treatment device (3) for removing mercury from divalent mercury; the third treatment device (3) comprises a tank body (31), the upper end surface of the tank body (31) is provided with a receiving groove (311), a cover body (32) for sealing the receiving groove (311) is arranged above the tank body (31), an air inlet pipe (34) connected to the receiving groove (311) is connected to the outside of the tank body (31), an air outlet pipe (35) connected to the receiving groove (311) is arranged on the cover body (32), a storage frame (33) is arranged in the receiving groove (311), activated carbon particles can be filled in the storage frame (33), and a locking structure (4) for limiting the movement of the storage frame (33) is arranged on the tank body (31).

2. The high-efficiency catalytic mercury removal equipment for coal-fired flue gas according to claim 1, characterized in that: The upper end surface of the tank body (31) is provided with an operating ring groove (312) surrounding the accommodating groove (311), the operating ring groove (312) is communicated with the accommodating groove (311), the bottom wall of the operating ring groove (312) is provided with an operating groove (313), the storage frame (33) comprises a supporting ring block (331) located in the operating ring groove (312), the locking structure (4) comprises a locking rod (41) vertically slidably arranged in the operating groove (313), the side surface of the locking rod (41) is provided with an elastic locking hook (42), the lower end surface of the supporting ring block (331) is provided with a through hole (3311) through which the locking rod (41) and the locking hook (42) can pass, the locking hook (42) can be hooked and matched with the supporting ring block (331), and a lifting structure (43) for realizing the lifting of the locking rod (41) is provided between the storage frame (33) and the tank body (31).

3. The high-efficiency catalytic mercury removal equipment for coal-fired flue gas according to claim 2, characterized in that: A circular hole (314) is provided on the inner wall of the operating groove (313) away from the vertical center axis of the tank body (31); the lifting structure (43) comprises a round rod (431) passing through the circular hole (314), a second rack (434) arranged below the supporting ring block (331), and a first rack (433) vertically slidably arranged in the operating groove (313); a linkage gear (432) located in the operating groove (313) is connected to the outer shell of the round rod (431); the first rack (433) and the linkage gear (432) are meshed with each other; the first rack (433) is fixedly connected to the lower end surface of the locking rod (41); the second rack (434) is located on a side of the linkage gear (432) away from the first rack (433); and the second rack (434) can mesh with the linkage gear (432).

4. The high-efficiency catalytic mercury removal equipment for coal-fired flue gas according to claim 2, characterized in that: The tank body (31) is provided with an unlocking assembly (44) for releasing the lock between the lock hook (42) and the support ring block (331); an arc-shaped groove (315) is provided on the outer circumferential surface of the tank body (31); the unlocking assembly (44) comprises an active magnetic block (441) slidably arranged in the groove (315) and a driven magnetic block (442) slidably arranged above the support ring block (331); the active magnetic block (441) can be magnetically attracted to the driven magnetic block (442); when the lock hook (42) is hooked to the support ring block (331), the driven magnetic block (442) can drive the lock hook (42) to no longer contact the support ring block (331).

5. The high-efficiency catalytic mercury removal equipment for coal-fired flue gas according to claim 3, characterized in that: The locking structure (4) and the lifting structure (43) are both provided with a plurality of locking structures (4), and the plurality of locking structures (4) are distributed in an array along the circumference of the tank body (31). The tank body (31) is provided with a linkage assembly (45) for synchronously rotating a plurality of round rods (431), and the linkage assembly (45) comprises a second bevel gear (452) sleeved outside the tank body (31) and a first bevel gear (451) sleeved outside the round rods (431), and the first bevel gear (451) is meshed with the second bevel gear (452).

6. The high-efficiency catalytic mercury removal equipment for coal-fired flue gas according to claim 1, characterized in that: The outlet pipe (35) is provided with a detection device (37) for detecting the mercury content in the gas, the outlet pipe (35) is provided with a return pipe (36), one end of the return pipe (36) away from the outlet pipe (35) is connected to the tank body (31), a valve (38) is provided at the end of the outlet pipe (35), and the detection device (37) is electrically connected to a controller on the valve (38).

7. The high-efficiency catalytic mercury removal equipment for coal-fired flue gas according to claim 1, characterized in that: The first processing device (1) comprises a horizontally placed fixed cylinder (11), one end of the fixed cylinder (11) is provided with a first fixed cover (12), a side of the first fixed cover (12) away from the fixed cylinder (11) is provided with a first fixed pipe (17) for air intake, the other end of the fixed cylinder (11) is provided with a second fixed cover (13), a side of the second fixed cover (13) away from the fixed cylinder (11) is provided with a second fixed pipe (18) for air outlet, a fixed rod (14) is provided in the fixed cylinder (11), the outer circumferential surface of the fixed rod (14) is provided with a fixed sheet (15) in the form of a threaded sheet, the surface of the fixed sheet (15) away from the axis of the fixed rod (14) is fixedly connected to the inner wall of the fixed cylinder (11), the fixed sheet (15), the surface of the fixed rod (14) and the inner wall of the fixed hole (111) enclose a spiral channel, and a spiral filter bag (16) is provided in the spiral channel.

8. The high-efficiency catalytic mercury removal equipment for coal-fired flue gas according to claim 7, characterized in that: The fixing plate (15) comprises an insulating section (151) and a conductive section (152) along the gas conveying direction; the filter bag (16) is located in a spiral channel of the insulating section (151); and the conductive section (152) is connected to a power source via an electric wire (153).

9. The high-efficiency catalytic mercury removal equipment for coal-fired flue gas according to claim 8, characterized in that: The filter bag (16) comprises a spiral rod (161) located in a spiral channel, one end of the spiral rod (161) along the length direction is connected to a mounting frame (162), a cleaning assembly (19) capable of cleaning the fixing plate (15) is arranged on the mounting frame (162) at a side away from the spiral rod (161), the mounting rod (192) is arranged on one side of the mounting ring block (191) along the axis of the fixing rod (14), and bristles (193) capable of abutting against the surface of the fixing plate (15) are arranged on the side of the mounting rod (192) away from the mounting ring block (191).

10. The high-efficiency catalytic mercury removal equipment for coal-fired flue gas according to claim 7, characterized in that: The second treatment device (2) comprises a reaction box (21), a reaction chamber (211) is provided in the reaction box (21), the second fixed tube (18) is connected to the reaction chamber (211), a reaction box (23) is arranged on the lower inner wall of the reaction chamber (211), a storage chamber (231) is provided in the reaction box (23), a storage chamber (231) is provided in the reaction box (23), the storage chamber (231) is filled with potassium persulfate powder, an air inlet (232) connected to the second fixed tube (18) is provided on the reaction box (23), an air outlet (233) connected to the storage chamber (231) is provided on the upper end surface of the reaction box (23), and an ultraviolet lamp (22) is arranged on the top of the reaction chamber (211).

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