Multi-stage composite dust remover for boiler flue gas

Abstract

The invention discloses a multi-stage composite dust remover for boiler flue gas. The multi-stage composite dust remover comprises a cyclone dust removal mechanism communicated with a boiler exhaust pipe, an electrostatic dust removal mechanism communicated with the cyclone dust removal mechanism, and a wet dust removal mechanism communicated with the electrostatic dust removal mechanism, the cyclone dust removal mechanism comprises a cyclone dust removal circulation shell, and the cyclone dust removal circulation shell is composed of a cyclone dust removal upper-section shell, a cyclone dust removal middle-section annular shell and a cyclone dust removal lower-section shell which are sequentially communicated from top to bottom; a dust removal rotary flow guide cone is rotationally connected in the cyclone dust removal circulation shell; a plurality of cyclone driving blades are fixed on the dust removal rotary flow guide cone; the dust remover has efficient dust removal capacity and can have a good trapping effect on dust particles with different particle sizes, firstly, the cyclone dust removal mechanism is used for removing large dust particles in boiler flue gas, and then the electrostatic dust removal mechanism is used for removing fine dust particles in the boiler flue gas; and finally, dust particles in the boiler flue gas are more thoroughly removed by utilizing a wet dust removal mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas purification and treatment, in particular to a boiler flue gas multi-stage composite dust collector. Background Art

[0002] During the use of boilers, dust and flue gas are inevitably generated. Boiler dust removal is to separate the dust in the boiler from the flue gas, thereby reducing dust pollution and facilitating further desulfurization and denitrification of the flue gas. With the development of society, environmental protection has received more and more attention from people, and boiler dust removal has also been applied to various fields such as thermal power generation;

[0003] The dust removal equipment used for boiler dust removal includes mechanical dust collectors, bag dust collectors, electrostatic dust collectors and wet dust collectors, but each dust removal and purification system always has its technical advantages and disadvantages. The existing technology is not thorough enough for boiler flue gas dust removal, and its dust removal rate needs to be further improved and optimized. Summary of the invention

[0004] The object of the present invention is to provide a boiler flue gas multi-stage composite dust collector which can more effectively and thoroughly remove dust particles in the boiler flue gas.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A boiler flue gas multi-stage composite dust collector comprises a cyclone dust removal mechanism connected to a boiler flue gas pipe, an electrostatic dust removal mechanism connected to the cyclone dust removal mechanism, and a wet dust removal mechanism connected to the electrostatic dust removal mechanism;

[0007] The cyclone dust removal mechanism comprises a cyclone dust removal circulation shell, which is composed of a cyclone dust removal upper shell, a cyclone dust removal middle ring shell and a cyclone dust removal lower shell which are sequentially connected from top to bottom;

[0008] A dust collecting rotating guide cone is rotatably connected in the cyclone dust collecting circulation shell, and a plurality of cyclone driving blades are fixed on the dust collecting rotating guide cone;

[0009] The electrostatic dust removal mechanism comprises an electrostatic dust removal support shell, a horizontally extending electrostatic dust removal circulation shell is fixed in the electrostatic dust removal support shell, and two parallel electrostatic dust removal adsorption rollers are rotatably arranged in the electrostatic dust removal circulation shell;

[0010] The wet dust removal mechanism comprises a horizontally arranged wet dust removal circulation shell, which is composed of a wet dust removal advection section pipe shell, a wet dust removal tapering section pipe shell and a wet dust removal expansion section pipe shell which are connected in sequence;

[0011] A water mist spray support column is provided in the wet dust removal tapered section tube shell and is coaxially arranged therewith. The end of the water mist spray support column close to the wet dust removal expansion section tube shell is a conical tip. The conical tip of the water mist spray support column is provided with a plurality of water mist spray accommodating holes. A water mist spray delivery pipe is fixed in the water mist spray accommodating hole, and a water mist nozzle connected to the water mist spray delivery pipe is fixed at the outer end of the water mist spray delivery pipe.

[0012] Preferably, a cyclone dust collection recovery mechanism is provided on the outer side of the cyclone dust collection middle ring shell, the cyclone dust collection recovery mechanism comprises a dust collection recovery ring shell fixed on the outer side of the cyclone dust collection middle ring shell, a scraping drive support slide rail coaxially arranged therewith is fixed inside the dust collection recovery ring shell, a scraping drive support slider is slidably connected to the scraping drive support slide rail, and a plurality of scraping adsorption strong magnets are fixed on the scraping drive support slider;

[0013] A vertically extending dust scraping support shaft is provided on the inner side wall of the middle ring shell of the cyclone dust collector, and the upper and lower ends of the dust scraping support shaft are rotatably connected to circumferential scraping support rollers, and the circumferential scraping support rollers are rollingly supported on the inner side wall of the middle ring shell of the cyclone dust collector;

[0014] Multiple adsorption supports and strong magnets are fixed on the side of the dust removal and scraping support shaft;

[0015] A plurality of dust scrapers are fixed on the dust removal and scraping support shaft, and one side of the blade of the dust scraper is pressed and contacted with the inner side wall of the middle ring shell of the cyclone dust collector;

[0016] A recovery compression tube shell extending radially is fixed inside the dust collection and recovery ring shell, a recovery compression through groove connected to the inside of the recovery compression tube shell is provided on the inner side wall of the middle ring shell of the cyclone dust collection, and two vertically penetrating compression partition connecting slide grooves are provided on the top of the recovery compression tube shell, and a recovery compression partition is slidably connected in the compression partition connecting slide groove;

[0017] A partition driving accommodating shell with an opening facing downward is fixed at the top of the recovery compression tube shell at the compression partition connecting slide groove, a partition driving lifting shell is slidably connected inside the partition driving accommodating shell, the lower end of the partition driving lifting shell is fixedly connected to the top of the recovery compression partition, and a partition lifting driving rod for driving the partition driving lifting shell to move is provided inside the partition driving accommodating shell;

[0018] A vertically penetrating compression drive rod connection hole is provided on the top of the recovery compression tube shell, a recovery compression connecting rod is slidably connected in the compression drive rod connection hole, and a recovery compression driving plate is fixed to one end of the recovery compression connecting rod in the recovery compression tube shell;

[0019] A compression drive accommodating shell with an opening facing downward is fixed at the top of the recovery compression tube shell at the compression drive rod connecting hole, and a recovery compression drive rod for driving the recovery compression connecting rod to move is arranged in the compression drive accommodating shell;

[0020] A filter partition plate is fixed at one end of the recovery compression tube shell away from the middle ring shell of the cyclone dust collector;

[0021] The filter partition plate is a porous hollow structure with two sides communicating with each other, and a separation filter screen is fixed on the side of the filter partition plate;

[0022] A compression block recovery box is fixed on the lower side of the dust collection recovery ring shell, and a compression recovery drop hole connected to the compression block recovery box is provided at the bottom of the recovery compression tube shell;

[0023] A drop hole opening and closing mechanism is provided at the compression recovery drop hole in the compression quick recovery box. The drop hole opening and closing mechanism includes a drop hole opening and closing cover plate slidably connected to the compression recovery drop hole. A drop hole opening and closing drive rod for driving the drop hole opening and closing cover plate to move is provided at the top of the compression quick recovery box.

[0024] Description: The cyclone dust recovery mechanism is used to clean the dust particles attached to the inner wall of the middle ring shell of the cyclone dust collector in real time to avoid excessive accumulation of dust particles that affect the dust removal effect.

[0025] Preferably, a cyclone drive support plate is fixed in the lower section shell of the cyclone dust collector, a cyclone drive accommodating shell is fixed on the top of the cyclone drive support plate, a vertically extending cyclone drive shaft is fixed to the dust collector rotating guide cone, a vertically penetrating cyclone shaft connecting hole is provided on the top of the cyclone drive accommodating shell, the cyclone drive shaft rotatably fits in the cyclone shaft connecting hole, and a cyclone drive motor for driving the cyclone drive shaft to rotate is fixed in the cyclone drive accommodating shell;

[0026] The cyclone drive support plate is provided with a plurality of cyclone dust removal guide holes.

[0027] Description: The cyclone drive support plate is provided to provide stable support for the rotation of the dust removal rotating guide cone.

[0028] Preferably, an electrostatic dust collection shell extending parallel to the axis of the electrostatic dust collection roller is provided between the two electrostatic dust collection rollers, and a plurality of electrostatic dust collection scrapers are fixed to the side of the electrostatic dust collection shell close to the electrostatic dust collection roller, and one side of the blade of the electrostatic dust collection scraper is in top pressure contact with the outer wall of the electrostatic dust collection roller;

[0029] The side of the electrostatic dust collection and recovery shell close to the electrostatic dust collection and adsorption drum has a plurality of electrostatic dust collection and recovery through holes communicating with each other inside and outside;

[0030] The electrostatic dust collection recovery shell is connected to an electrostatic dust collection recovery box through an electrostatic dust collection external exhaust pipe, and the electrostatic dust collection recovery box is connected to an electrostatic dust collection vacuum pump. The input end of the electrostatic dust collection vacuum pump is connected to the inside of the electrostatic dust collection box through a pipeline.

[0031] Description: During the rotation process, the electrostatic dust removal adsorption drum moves relative to the electrostatic dust removal scraper. The electrostatic dust removal scraper is used to scrape off the dust particles adsorbed on the outer side of the electrostatic dust removal adsorption drum, and the scraped dust particles are recovered into the electrostatic dust removal recovery shell.

[0032] Preferably, roller support end shells are provided at both ends of the electrostatic dust removal adsorption roller, and the roller support end shells are fixedly connected to the inner side walls of the electrostatic dust removal support shells through fixed connecting plates. The rotating shaft of the electrostatic dust removal adsorption roller is rotatably connected and extends to the interior of the roller support end shells. A roller drive motor is fixed in the roller support end shells for driving the rotating shaft of the electrostatic dust removal adsorption roller to rotate.

[0033] Description: The drum support end shell provides stable support for the rotational movement of the electrostatic dust removal adsorption drum. The outer side of the drum support end shell is a streamlined structure, which can play a good role in guiding the boiler flue gas.

[0034] Preferably, the two ends of the outer side wall of the electrostatic precipitator circulation shell and the inner side wall of the electrostatic precipitator support shell are sealed and connected via a dust collection circulation sealing ring;

[0035] A plurality of electric field balancing ring plates arranged parallel to each other are fixed on the outer side wall of the electrostatic precipitator circulation shell.

[0036] Description: The electric field balancing ring plate can make the electric field applied to the electrostatic precipitator circulation shell more evenly distributed, which is beneficial to improving the stability and consistency of the electrostatic precipitator.

[0037] Preferably, a dust collection and recovery support slide rail extending circumferentially thereof is fixed to the inner side wall of the electrostatic dust collection support shell, a dust collection and recovery support slider is slidably connected to the dust collection and recovery support slide rail, an inner wall scraping and recovery shell extending parallel to the axis of the electrostatic dust collection adsorption drum is fixed to the dust collection and recovery support slider, a plurality of inner wall recovery scrapers are fixed to the inner wall scraping and recovery shell on one side close to the inner side wall of the electrostatic dust collection circulation shell, one side of the blade of the inner wall recovery scraper is in pressure contact with the inner side wall of the electrostatic dust collection circulation shell, and a plurality of inner wall scraping and recovery through holes communicating with the inside and outside are provided on the inner wall scraping and recovery shell on one side close to the inner side wall of the electrostatic dust collection circulation shell;

[0038] The inner wall scraping recovery shell is connected with the electrostatic dust collection recovery box through the inner wall scraping exhaust pipe.

[0039] Description: Use the inner wall recovery scraper to scrape off the dust particles adsorbed on the inner wall of the electrostatic dust removal circulation shell. Since the inside of the inner wall scraping and recovery shell is also in a negative pressure state, under the action of negative pressure, the scraped dust particles can be recovered to the inside of the inner wall scraping and recovery shell in time.

[0040] Preferably, a circulation gap adjustment mechanism is provided in the tube shell of the wet dust removal advection section, and the circulation gap adjustment mechanism comprises a gap adjustment fixing cylinder fixed in the tube shell of the wet dust removal advection section and arranged coaxially therewith, a gap adjustment telescopic cylinder is slidably connected to the outer side of the gap adjustment fixing cylinder, and the outer end of the gap adjustment telescopic cylinder is fixedly connected to the water mist spraying support column;

[0041] A gap adjustment driving rod for driving the gap adjustment telescopic cylinder to move is arranged in the gap adjustment fixed cylinder.

[0042] Description: The flow gap adjustment mechanism can adjust the relative position between the water mist spray support column and the wet dust removal tapered section tube shell, and then adjust the flow gap between the water mist spray support column and the inner side wall of the wet dust removal tapered section tube shell, so that the boiler flue gas presents a variety of flow rates.

[0043] Preferably, an auxiliary centrifugal mechanism is provided in the wet dust removal expansion section tube shell, the auxiliary centrifugal mechanism comprises a centrifugal drive accommodating shell fixed in the wet dust removal expansion section tube shell and arranged coaxially therewith, an auxiliary centrifugal rotating shaft is rotatably connected to the centrifugal drive accommodating shell, and a plurality of auxiliary centrifugal blades are fixed to the auxiliary centrifugal rotating shaft;

[0044] An auxiliary centrifugal drive motor is fixed in the centrifugal drive housing, and an output shaft of the auxiliary centrifugal drive motor is transmission-connected with the auxiliary centrifugal rotating shaft through a planetary reducer.

[0045] Description: The auxiliary centrifugal mechanism can make the boiler flue gas form a local vortex in the wet dust removal expansion section shell. Under the centrifugal effect, it is helpful to force the water mist adsorbed with dust particles to settle and accumulate on the inner wall of the wet dust removal expansion section shell to form dust particle sludge.

[0046] Preferably, a wet dust scraping mechanism is provided in the wet dust removal expansion section tube shell, the wet dust scraping mechanism comprises a wet dust scraping support ring fixed to the inner side wall of the wet dust removal expansion section tube shell and arranged coaxially therewith, the wet dust scraping support ring is rotatably connected to a wet dust scraping rotating ring, a plurality of wet dust scraping blades are fixed to the wet dust scraping rotating ring, and the side edges of the wet dust scraping blades are in contact with and cooperate with the inner side wall of the wet dust removal expansion section tube shell;

[0047] A plurality of wet dust scraping and exhaust pipes connected with the interior of the wet dust removal expansion section are fixed on the lower side of the tube shell.

[0048] Description: Use multiple wet dust scrapers to shovel off the dust particle sludge that has settled and accumulated on the inner wall of the wet dust expansion section shell. The dust particle sludge is finally discharged through multiple wet dust scrapers and exhaust pipes on the lower side of the wet dust expansion section shell.

[0049] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0050] 1. The present invention has a reasonable structural design and high-efficiency dust removal capability, and can have a good capture effect on dust particles of different particle sizes. First, the cyclone dust removal mechanism is used to remove larger dust particles in the boiler flue gas, and then the electrostatic dust removal mechanism is used to remove fine dust particles in the boiler flue gas. Finally, the wet dust removal mechanism is used to remove the dust particles in the boiler flue gas more thoroughly.

[0051] 2. The present invention is easy to operate and has good stability and reliability. During the normal operation cycle of the boiler, the multi-stage composite dust collector should be able to work continuously and stably, and the design and connection method of each internal component can ensure normal operation under different flue gas flow, temperature and pressure conditions;

[0052] 3. The dust collector of the present invention has strong adaptability and can adapt to the flue gas characteristics of various boilers, including different temperatures, humidity, flow rates and particle properties. The flue gas composition and properties are different. The dust collector should be able to adapt to these differences and adjust the dust removal and purification strategies accordingly;

[0053] 4. The cyclone dust collection and recovery mechanism of the present invention can clean the dust particles attached and accumulated on the inner wall of the middle ring shell of the cyclone dust collection in real time, so as to avoid excessive accumulation of dust particles affecting the dust collection effect, and the dust particles compressed into cake shape can greatly reduce the volume occupied, thereby improving the overall work efficiency;

[0054] 5. The flow gap adjustment mechanism of the present invention can adjust the relative position between the water mist spray support column and the wet dust removal tapered section tube shell, and then adjust the flow gap between the water mist spray support column and the inner wall of the wet dust removal tapered section tube shell, so as to make the boiler flue gas present a variety of flow rates according to actual conditions, ensuring a good dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a front view of the present invention;

[0056] Figure 2 It is a schematic structural diagram of the cyclone dust removal mechanism of the present invention;

[0057] Figure 3 It is a schematic diagram of the structure of the cyclone dust collection and recovery mechanism of the present invention;

[0058] Figure 4 yes Figure 3 A top view of

[0059] Figure 5 It is a schematic diagram of the structure of the recycling compression shell of the present invention;

[0060] Figure 6 It is a structural schematic diagram of the opening and closing mechanism of the drop hole of the present invention;

[0061] Figure 7It is a structural schematic diagram of the electrostatic dust removal mechanism of the present invention;

[0062] Figure 8 yes Figure 7 Left view of

[0063] Fig. 9 It is a left side view of the inner wall scraping and recycling shell of the present invention;

[0064] Fig.10 It is a structural schematic diagram of the wet dust removal mechanism of the present invention;

[0065] Fig.11 It is a structural schematic diagram of a water mist spraying support column of the present invention;

[0066] Fig.12 It is a structural schematic diagram of the gap adjustment mechanism of the present invention;

[0067] Fig.13 It is a structural schematic diagram of the auxiliary centrifugal mechanism of the present invention.

[0068] In the figure, 10-cyclone dust removal mechanism, 101-boiler smoke exhaust pipe, 100-cyclone dust removal circulation shell, 11-cyclone dust removal upper shell, 110-cyclone dust removal input pipe, 12-cyclone dust removal middle ring shell, 13-cyclone dust removal lower shell, 130-cyclone dust removal output pipe, 14-dust removal rotating guide cone, 140-cyclone drive blade, 141-cyclone drive shaft, 15-cyclone dust removal recovery mechanism, 151-dust removal recovery ring shell, 152-scraping drive support slide rail, 153-scraping drive support slider, 154-scraping adsorption strong magnet, 155-dust removal scraping support shaft, 1550-circumferential scraping support roller, 156-adsorption support matching strong magnet, 161-recovery compression tube shell, 1601-negative pressure chamber chamber, 1602-recovery compression chamber, 1610-recovery compression slot, 1611-compression partition connecting slide slot, 1612-compression drive rod connecting hole, 162-recovery compression partition, 1621-partition drive accommodating shell, 1622-partition drive lifting shell, 1623-partition lifting drive rod, 163-recovery compression connecting rod, 1631-compression drive accommodating shell, 1632-recovery compression drive rod, 164-recovery compression drive plate, 165-separation filter plate, 1650-separation filter screen, 166-compression block recovery box, 1660-compression recovery drop hole, 167-impact suction pump, 17-drop hole opening and closing mechanism, 171-drop hole opening and closing cover plate, 172-drop hole opening and closing drive rod, 18-cyclone drive support plate , 180-cyclone dust guide hole, 19-cyclone drive housing, 191-cyclone shaft connection hole, 192-cyclone drive motor, 20-electrostatic dust removal mechanism, 21-electrostatic dust removal support shell, 210-dust removal circulation sealing ring, 211-electrostatic dust removal input pipe, 212-electrostatic dust removal output pipe, 22-electrostatic dust removal circulation shell, 220-electric field balancing ring plate, 23-electrostatic dust removal adsorption roller, 231-roller support end shell, 232-roller drive motor, 24-electrostatic dust removal recovery shell, 240-electrostatic dust removal recovery through hole, 241-electrostatic dust removal scraper, 25-electrostatic dust removal recovery box, 251-electrostatic dust removal external exhaust pipe, 252-electrostatic dust removal vacuum pump, 261-dust removal recovery support slide rail, 262-dust removal Recovery support slider, 27-inner wall scraping recovery shell, 270-inner wall scraping recovery through hole, 271-inner wall recovery scraper, 30-wet dust removal mechanism, 300-wet dust removal circulation shell, 31-wet dust removal advection section tube shell, 310-wet dust removal input pipe, 32-wet dust removal tapering section tube shell, 33-wet dust removal expansion section tube shell, 330-wet dust removal output pipe, 34-water mist spraying support column, 341-water mist spraying accommodating hole, 342-water mist spraying delivery pipe, 343-water mist nozzle, 35-gap adjustment mechanism, 351-gap adjustment fixed cylinder, 352-gap adjustment telescopic cylinder, 353-gap adjustment drive rod, 36-auxiliary centrifugal mechanism, 361-centrifugal drive accommodating shell, 362-auxiliary centrifugal shaft,363- auxiliary centrifugal blades, 364- auxiliary centrifugal drive motor, 365- planetary reducer, 37- wet dust scraping mechanism, 371- wet dust scraping support ring, 372- wet dust scraping rotating ring, 373- wet dust scraping blade, 374- wet dust scraping except the exhaust pipe. DETAILED DESCRIPTION

[0069] Combine the following Figures 1 to 13 The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front, and back directions mentioned below are consistent with the up, down, left, right, front, and back directions of the projection relationship of the respective main views or structural schematic diagrams themselves.

[0070] Embodiment 1:

[0071] A boiler flue gas multi-stage composite dust collector, such as Figure 1 As shown, it includes a cyclone dust removal mechanism 10 connected to a boiler smoke exhaust pipe 101, an electrostatic dust removal mechanism 20 connected to the cyclone dust removal mechanism 10, and a wet dust removal mechanism 30 connected to the electrostatic dust removal mechanism 20;

[0072] like Figure 2 As shown, the cyclone dust removal mechanism 10 includes a cyclone dust removal circulation shell 100, which is composed of a cyclone dust removal upper shell 11, a cyclone dust removal middle ring shell 12 and a cyclone dust removal lower shell 13 which are sequentially connected from top to bottom;

[0073] A cyclone dust collection inlet pipe 110 connected to the interior of the cyclone dust collection upper shell 11 is fixed to the top, and a cyclone dust collection outlet pipe 130 connected to the interior of the cyclone dust collection lower shell 13 is fixed to the lower end;

[0074] A dust removal rotating guide cone 14 is rotatably connected in the cyclone dust removal circulation shell 100, and a plurality of cyclone driving blades 140 are fixed on the dust removal rotating guide cone 14;

[0075] like Figure 2 As shown, a cyclone dust collection and recovery mechanism 15 is provided on the outer side of the cyclone dust collection middle ring shell 12. Figure 3 As shown, the cyclone dust collection and recovery mechanism 15 includes a dust collection and recovery ring shell 151 fixed on the outside of the cyclone dust collection middle ring shell 12, a scraping drive support slide rail 152 coaxially arranged therewith is fixed inside the dust collection and recovery ring shell 151, a scraping drive support slider 153 is slidably connected to the scraping drive support slider 152, and a plurality of scraping adsorption strong magnets 154 are fixed to the scraping drive support slider 153;

[0076] The scraper drive support slider 153 is driven by a servo motor of the prior art through gear transmission to move along the scraper drive support slide rail 152;

[0077] A vertically extending dust scraping support shaft 155 is provided on the inner side wall of the cyclone dust collector middle ring shell 12. The upper and lower ends of the dust scraping support shaft 155 are rotatably connected to circumferential scraping support rollers 1550. The circumferential scraping support rollers 1550 are rollingly supported on the inner side wall of the cyclone dust collector middle ring shell 12.

[0078] A plurality of adsorption support and strong magnets 156 are fixed to the side of the dust removal and scraping support shaft 155;

[0079] A plurality of dust scrapers 157 are fixed on the dust scraping support shaft 155, and one side of the blade of the dust scraper 157 is pressed and contacted with the inner wall of the cyclone dust collecting middle ring shell 12;

[0080] like Figure 5 As shown, a recovery compression tube shell 161 extending radially is fixed inside the dust collection and recovery ring shell 151, and a recovery compression through groove 1610 connected to the inside of the recovery compression tube shell 161 is provided on the inner side wall of the cyclone dust collection middle ring shell 12, and the top of the recovery compression tube shell 161 has two vertically penetrating compression partition connecting grooves 1611, and a recovery compression partition 162 is slidably connected in the compression partition connecting groove 1611;

[0081] A partition driving accommodating shell 1621 with an opening facing downward is fixed at the top of the recovery compression tube shell 161 at the compression partition connecting slide groove 1611, a partition driving lifting shell 1622 is slidably connected inside the partition driving accommodating shell 1621, the lower end of the partition driving lifting shell 1622 is fixedly connected to the top of the recovery compression partition 162, and a partition lifting driving rod 1623 for driving the partition driving lifting shell 1622 to move is provided inside the partition driving accommodating shell 1621;

[0082] The partition lifting driving rod 1623 is an electric control telescopic rod of the prior art, the outer rod end of the partition lifting driving rod 1623 is fixedly connected to the top of the partition driving accommodating shell 1621, and the inner rod end of the partition lifting driving rod 1623 is fixedly connected to the bottom of the partition driving lifting shell 1622;

[0083] The top of the recovery compression tube shell 161 is provided with a compression driving rod connecting hole 1612 which passes vertically therethrough, a recovery compression connecting rod 163 is slidably connected in the compression driving rod connecting hole 1612, and a recovery compression driving plate 164 is fixed to one end of the recovery compression connecting rod 163 in the recovery compression tube shell 161;

[0084] A compression drive housing 1631 with an opening facing downward is fixed at the top of the recovery compression tube housing 161 at the compression drive rod connecting hole 1612, and a recovery compression drive rod 1632 for driving the recovery compression connecting rod 163 to move is arranged in the compression drive housing 1631;

[0085] The recovery compression driving rod 1632 is an electrically controlled telescopic rod of the prior art, the outer rod end of the recovery compression driving rod 1632 is fixedly connected to the top of the compression driving accommodating shell 1631, and the inner rod end of the recovery compression driving rod 1632 is fixedly connected to the upper end of the recovery compression connecting rod 163;

[0086] A filter partition plate 165 is fixed to one end of the recovery compression tube shell 161 away from the cyclone dust collector middle ring shell 12;

[0087] The filter partition plate 165 is a porous hollow structure with two sides communicating with each other, and a separation filter screen 1650 is fixed on the side of the filter partition plate 165;

[0088] The filter partition plate 165 divides the interior of the recovery compression tube shell 161 into a negative pressure chamber 1601 and a recovery compression chamber 1602, and an impact suction pump 167 is connected to the negative pressure chamber 1601;

[0089] like Figure 6 As shown, a compression block recovery box 166 is fixed to the lower side of the dust collection recovery ring shell 151, and a compression recovery drop hole 1660 connected to the compression block recovery box 166 is provided at the bottom of the recovery compression tube shell 161;

[0090] A drop hole opening and closing mechanism 17 is provided at the compression recovery drop hole 1660 in the compression recovery box 166. The drop hole opening and closing mechanism 17 includes a drop hole opening and closing cover plate 171 slidably connected to the compression recovery drop hole 1660. A drop hole opening and closing driving rod 172 for driving the drop hole opening and closing cover plate 171 to move is provided at the top of the compression recovery box 166.

[0091] The drop hole opening and closing driving rod 172 is an electric control telescopic rod of the prior art, the outer rod end of the drop hole opening and closing driving rod 172 is fixedly connected to the top of the compression quick recovery box 166, and the inner rod end of the drop hole opening and closing driving rod 172 is fixedly connected to the drop hole opening and closing cover plate 171;

[0092] like Figure 7 As shown, the electrostatic dust removal mechanism 20 includes an electrostatic dust removal support shell 21, a horizontally extending electrostatic dust removal circulation shell 22 is fixed in the electrostatic dust removal support shell 21, and two parallel electrostatic dust removal adsorption rollers 23 are rotatably arranged in the electrostatic dust removal circulation shell 22;

[0093] An electrostatic precipitator input pipe 211 and an electrostatic precipitator output pipe 212 connected to the inside of the electrostatic precipitator support shell 21 are fixed to both ends of the outer side thereof, and the electrostatic precipitator input pipe 211 is connected to the cyclone precipitator output pipe 130;

[0094] like Figure 8As shown, an electrostatic dust collection shell 24 extending parallel to the axis of the electrostatic dust collection roller 23 is provided between the two electrostatic dust collection rollers 23, and a plurality of electrostatic dust collection scrapers 241 are fixed to the side of the electrostatic dust collection shell 24 close to the electrostatic dust collection roller 23, and one side of the blade of the electrostatic dust collection scraper 241 is in pressure contact with the outer wall of the electrostatic dust collection roller 23;

[0095] Both ends of the electrostatic dust collection shell 24 are fixedly connected to the inner wall of the electrostatic dust support shell 21 through a fixed connecting plate;

[0096] The side of the electrostatic dust collection shell 24 close to the electrostatic dust adsorption drum 23 has a plurality of electrostatic dust collection through holes 240 communicating with each other.

[0097] The electrostatic dust collection shell 24 is connected to an electrostatic dust collection box 25 through an electrostatic dust collection external exhaust pipe 251, and the electrostatic dust collection box 25 is connected to an electrostatic dust collection vacuum pump 252. The input end of the electrostatic dust collection vacuum pump 252 is connected to the inside of the electrostatic dust collection box 25 through a pipeline.

[0098] like Figure 7 As shown, the inner wall of the electrostatic dust removal support shell 21 is fixed with a dust collection and recovery support slide rail 261 extending around the circumference thereof, and the dust collection and recovery support slide rail 261 is slidably connected with a dust collection and recovery support slider 262, and the dust collection and recovery support slider 262 is fixed with an inner wall scraping and recovery shell 27 extending parallel to the axis of the electrostatic dust removal adsorption drum 23, as shown in FIG. Fig. 9 As shown, a plurality of inner wall recovery scrapers 271 are fixed to one side of the inner wall scraping and recovery shell 27 close to the inner wall of the electrostatic dust collection circulation shell 22, and one side of the blade of the inner wall recovery scraper 271 is pressed and contacted with the inner wall of the electrostatic dust collection circulation shell 22, and a plurality of inner wall scraping and recovery through holes 270 are provided on one side of the inner wall scraping and recovery shell 27 close to the inner wall of the electrostatic dust collection circulation shell 22;

[0099] The inner wall scraping recovery shell 27 is connected to the electrostatic dust collection box 25 through the inner wall scraping exhaust pipe;

[0100] like Fig.10 As shown, the wet dust removal mechanism 30 includes a horizontally arranged wet dust removal circulation shell 300, which is composed of a wet dust removal advection section pipe shell 31, a wet dust removal tapering section pipe shell 32, and a wet dust removal expansion section pipe shell 33 which are sequentially connected;

[0101] A wet dust removal input pipe 310 connected to the interior is fixed to the outer end of the wet dust removal advection section tube shell 31, and a wet dust removal output pipe 330 connected to the interior is fixed to the outer end of the wet dust removal expansion section tube shell 33. The wet dust removal input pipe 310 is connected to the electrostatic dust removal output pipe 212.

[0102] A water mist spraying support column 34 is coaxially arranged in the wet dust removal tapered section tube shell 32. Fig.11 As shown, the end of the water mist spray support column 34 close to the wet dust removal expansion section tube shell 33 is a conical tip, and the conical tip of the water mist spray support column 34 is provided with a plurality of water mist spray accommodating holes 341, and a water mist spray delivery pipe 342 is fixed in the water mist spray accommodating hole 341, and a water mist nozzle 343 connected to the water mist spray delivery pipe 342 is fixed at the outer end of the water mist spray delivery pipe 342.

[0103] Embodiment 2:

[0104] On the basis of Example 1, Figure 2 As shown, a cyclone drive support plate 18 is fixed in the lower section shell 13 of the cyclone dust collector, a cyclone drive accommodating shell 19 is fixed on the top of the cyclone drive support plate 18, a vertically extending cyclone drive shaft 141 is fixed to the dust removal rotating guide cone 14, a vertically penetrating cyclone shaft connecting hole 191 is provided on the top of the cyclone drive accommodating shell 19, the cyclone drive shaft 141 is rotatably fitted in the cyclone shaft connecting hole 191, and a cyclone drive motor 192 for driving the cyclone drive shaft 141 to rotate is fixed in the cyclone drive accommodating shell 19;

[0105] The cyclone driving support plate 18 has a plurality of cyclone dust removal guide holes 180 .

[0106] Embodiment 3:

[0107] On the basis of Example 2, Figure 7 As shown, roller support end shells 231 are provided at both ends of the electrostatic dust removal adsorption roller 23, and the roller support end shells 231 are fixedly connected to the inner wall of the electrostatic dust removal support shell 21 through a fixed connecting plate. The rotating shaft of the electrostatic dust removal adsorption roller 23 is rotatably connected and extends to the inside of the roller support end shell 231, and a roller driving motor 232 is fixed in the roller support end shell 231 for driving the rotating shaft of the electrostatic dust removal adsorption roller 23 to rotate.

[0108] Embodiment 4:

[0109] On the basis of Example 3, Figure 7 As shown, the two ends of the outer wall of the electrostatic precipitator circulation shell 22 and the inner wall of the electrostatic precipitator support shell 21 are sealed and connected via a dust collection circulation sealing ring 210;

[0110] A plurality of electric field balancing ring plates 220 arranged parallel to each other are fixed to the outer side wall of the electrostatic precipitator circulation shell 22.

[0111] Embodiment 5:

[0112] On the basis of Example 4, Fig.10 As shown, a flow gap adjustment mechanism 35 is provided in the wet dust removal advection section tube shell 31. Fig.12As shown, the circulation gap adjustment mechanism 35 includes a gap adjustment fixed cylinder 351 fixed in the wet dust removal advection section tube shell 31 and arranged coaxially therewith, and a gap adjustment telescopic cylinder 352 is slidably connected to the outer side of the gap adjustment fixed cylinder 351, and the outer end of the gap adjustment telescopic cylinder 352 is fixedly connected to the water mist spraying support column 34;

[0113] A gap adjustment driving rod 353 for driving the gap adjustment telescopic cylinder 352 to move is provided in the gap adjustment fixed cylinder 351. The gap adjustment driving rod 353 is an electrically controlled telescopic rod driven by a servo motor in the prior art. The outer rod end of the gap adjustment driving rod 353 is fixedly connected to the inner end of the gap adjustment fixed cylinder 351, and the inner rod end of the gap adjustment driving rod 353 is fixedly connected to the inner end of the gap adjustment telescopic cylinder 352.

[0114] Embodiment 6:

[0115] On the basis of Example 5, Fig.10 As shown, an auxiliary centrifugal mechanism 36 is provided in the wet dust removal expansion section tube shell 33. Fig.13 As shown, the auxiliary centrifugal mechanism 36 includes a centrifugal drive housing 361 fixed in the wet dust removal expansion section tube shell 33 and arranged coaxially therewith, and an auxiliary centrifugal rotating shaft 362 is rotatably connected to the centrifugal drive housing 361, and a plurality of auxiliary centrifugal blades 363 are fixed to the auxiliary centrifugal rotating shaft 362;

[0116] An auxiliary centrifugal drive motor 364 is fixed in the centrifugal drive housing 361 , and an output shaft of the auxiliary centrifugal drive motor 364 is transmission-connected to the auxiliary centrifugal rotating shaft 362 via a planetary reducer 365 .

[0117] Embodiment 7:

[0118] On the basis of Example 6, a wet dust scraping mechanism 37 is provided in the wet dust removal expansion section tube shell 33, such as Fig.13 As shown, the wet dust scraping mechanism 37 includes a wet dust scraping support ring 371 fixed to the inner side wall of the wet dust removal expansion section tube shell 33 and arranged coaxially therewith, and a wet dust scraping rotating ring 372 is rotatably connected to the wet dust scraping support ring 371, and a plurality of wet dust scraping plates 373 are fixed to the wet dust scraping rotating ring 372, and the side edges of the wet dust scraping plates 373 are in contact with the inner side wall of the wet dust removal expansion section tube shell 33;

[0119] The wet dust scraping rotating ring 372 is driven by a prior art motor fixed to the inner side wall of the wet dust removal expansion section tube shell 33 through gear transmission to rotate around the axis of the wet dust scraping supporting ring 371;

[0120] A plurality of wet dust scraping and exhaust pipes 374 connected to the interior of the wet dust removal expansion section tube shell 33 are fixed to the lower side thereof.

[0121] In the actual application process of the present invention, the boiler smoke is discharged from the boiler smoke exhaust pipe 101 and then enters the cyclone dust collection circulation shell 100 through the cyclone dust collection inlet pipe 110. The boiler smoke flows from top to bottom and passes through the cyclone dust collection upper shell 11, the cyclone dust collection middle ring shell 12 and the cyclone dust collection lower shell 13 in sequence;

[0122] The cyclone drive motor 192 is a motor of the prior art. The output shaft of the cyclone drive motor 192 drives the cyclone drive shaft 141 to rotate through gear transmission. The cyclone drive shaft 141 drives the dust removal rotating guide cone 14 to rotate together with the multiple cyclone drive blades 140.

[0123] Driven by the multiple cyclone driving blades 140, the boiler flue gas flowing through the cyclone dust collector circulation shell 100 generates a cyclone. Under the centrifugal effect, the dust particles in the boiler flue gas will be thrown to the inner side wall of the cyclone dust collector middle section ring shell 12 and adhere to and accumulate on the inner side wall of the cyclone dust collector middle section ring shell 12.

[0124] The boiler flue gas after centrifugal treatment passes through the cyclone dust collecting guide hole 180, enters the cyclone dust collecting lower section shell 13, and is finally discharged through the cyclone dust collecting outlet pipe 130;

[0125] The cyclone dust collection mechanism 15 is used to clean the dust particles adhering to and accumulating on the inner wall of the cyclone dust collection middle section ring casing 12 in real time;

[0126] The scraping drive support slider 153 is driven by a servo motor of the prior art through gear transmission to move along the scraping drive support slide rail 152. The scraping adsorption strong magnet 154 and the adsorption support matching strong magnet 156 are both neodymium iron boron permanent magnets of the prior art. Due to the mutual attraction and traction between the scraping adsorption strong magnet 154 and the adsorption support matching strong magnet 156, the scraping drive support slider 153 can drive the dust removal scraping support shaft 155 to move circumferentially around the cyclone dust collector middle section ring shell 12 through the mutual traction between the scraping adsorption strong magnet 154 and the adsorption support matching strong magnet 156. In this process, the circumferential scraping support roller 1550 is rollingly supported on the inner side wall of the cyclone dust collector middle section ring shell 12 to provide stable support for the dust removal scraping support shaft 155.

[0127] The dust scraper 157 is used to scrape off the dust particles adhering to and accumulating on the inner wall of the middle ring shell 12 of the cyclone dust collector and push them to the recovery compression groove 1610. The impact air pump 167 is an air pump of the prior art. The impact air pump 167 can perform intermittent periodic air extraction in the negative pressure chamber 1601, so that the dust particles can be sucked into the recovery compression tube shell 161 under the action of negative pressure.

[0128] When 50% of the volume of dust particles are accumulated in the recovery compression tube shell 161, the inner rod of the partition lifting driving rod 1623 extends to drive the partition driving lifting shell 1622 and the recovery compression partition 162 to move downward, separating the dust particles between the two recovery compression partitions 162;

[0129] Then the inner rod of the recovery compression driving rod 1632 extends to drive the recovery compression connecting rod 163 and the recovery compression driving plate 164 to move downward, thereby compressing the accumulated dust particles;

[0130] Then the inner rod of the drop hole opening and closing driving rod 172 retracts and drives the drop hole opening and closing cover plate 171 away from the compression recovery drop hole 1660, so that the recovery compression chamber 1602 is in a connected state with the inside of the compression block recovery box 166, and the compressed dust particles fall into the compression block recovery box 166 through the compression recovery drop hole 1660;

[0131] The inner rod of the drop hole opening and closing driving rod 172 extends to drive the drop hole opening and closing cover plate 171 to return to the compression recovery drop hole 1660 to seal the compression recovery drop hole 1660;

[0132] The inner rod of the recovery compression driving rod 1632 is retracted to drive the recovery compression connecting rod 163 and the recovery compression driving plate 164 to move upward, and the inner rod of the partition lifting driving rod 1623 is retracted to drive the partition driving lifting shell 1622 and the recovery compression partition 162 to move upward, and continue to recover the dust particles attached to and accumulated on the inner wall of the cyclone dust collector middle section ring shell 12;

[0133] The boiler flue gas treated by the cyclone dust removal mechanism 10 is further treated by the electrostatic dust removal mechanism 20. The boiler flue gas discharged from the cyclone dust removal output pipe 130 enters the electrostatic dust removal support shell 21 through the electrostatic dust removal input pipe 211 and flows through the electrostatic dust removal circulation shell 22.

[0134] The electrostatic precipitator circulation shell 22 and the electrostatic precipitator adsorption drum 23 are connected to the positive and negative electrodes of the power supply respectively. Under the action of the electric field, the dust particles in the boiler flue gas flowing through the electrostatic precipitator circulation shell 22 will be adsorbed on the inner wall of the electrostatic precipitator circulation shell 22 and the outer wall of the electrostatic precipitator adsorption drum 23.

[0135] The drum driving motor 232 is a motor of the prior art. The drum driving motor 232 drives the rotating shaft of the electrostatic dust removal adsorption drum 23 to rotate together with the electrostatic dust removal adsorption drum 23 through gear transmission. The electrostatic dust removal adsorption drum 23 moves relative to the electrostatic dust removal scraper 241 during the rotation process. The electrostatic dust removal scraper 241 is used to shovel off the dust particles adsorbed on the outer side of the electrostatic dust removal adsorption drum 23.

[0136] The electrostatic dust removal vacuum pump 252 is a vacuum pump of the prior art. The electrostatic dust removal vacuum pump 252 can evacuate the inside of the electrostatic dust collection box 25, so that the inside of the electrostatic dust collection shell 24 is also in a negative pressure state. Under the action of the negative pressure, the dust particles shoveled off will be sucked into the electrostatic dust collection shell 24 through the electrostatic dust collection through hole 240. The dust particles entering the electrostatic dust collection shell 24 are transported by the electrostatic dust collection external exhaust pipe 251 and collected in the electrostatic dust collection box 25.

[0137] The dust collection and recovery support slider 262 is driven by a servo motor of the prior art through a gear rack transmission to move along the dust collection and recovery support slide rail 261, and the dust collection and recovery support slider 262 drives the inner wall scraping and recovery shell 27 to move around the circumference of the electrostatic dust collection circulation shell 22, and the inner wall scraping and recovery shell 27 reciprocates "clockwise" and "counterclockwise" around the circumference of the electrostatic dust collection circulation shell 22;

[0138] The dust particles adsorbed on the inner wall of the electrostatic dust collection circulation shell 22 are scraped off by the inner wall recovery scraper 271. Since the inner wall recovery shell 27 is also in a negative pressure state, the scraped dust particles are sucked into the inner wall recovery shell 27 through the inner wall recovery through hole 270 under the action of the negative pressure. The dust particles entering the inner wall recovery shell 27 are transported by the electrostatic dust collection external exhaust pipe 251 and collected in the electrostatic dust collection box 25.

[0139] The boiler flue gas treated by the electrostatic precipitator 20 is discharged from the electrostatic precipitator output pipe 212 and is further treated by the wet precipitator 30. The boiler flue gas discharged from the electrostatic precipitator output pipe 212 enters the wet precipitator circulation shell 300 through the wet precipitator input pipe 310.

[0140] The boiler flue gas flows through the wet dust removal horizontal flow section tube shell 31, the wet dust removal tapered section tube shell 32 and the wet dust removal expansion section tube shell 33 in sequence. When the boiler flue gas flows through the wet dust removal tapered section tube shell 32, the flow rate of the boiler flue gas is accelerated due to the tapered structure of the pipe diameter. The delivery pump of the prior art is used to deliver water to each water mist spraying delivery pipe 342. The water is sprayed from each water mist nozzle 343 in the form of water mist and mixed with the boiler flue gas. The boiler flue gas with a higher flow rate can break up the water mist into finer water droplets.

[0141] When the boiler flue gas flows through the wet dust removal expansion section tube shell 33, the flow rate of the boiler flue gas will be slowed down due to the gradually expanding tube diameter, and the mixture of water mist and boiler flue gas will be quickly diffused in the wet dust removal expansion section tube shell 33, so that the small water droplets in the form of water mist can be more fully and evenly mixed with the dust particles in the boiler flue gas, and the small water droplets in the form of water mist are used to adsorb the dust particles, and the water mist adsorbed with the dust particles is forced to settle;

[0142] The flow gap adjustment mechanism 35 can adjust the relative position between the water mist spray support column 34 and the wet dust removal tapered section tube shell 32, and further adjust the flow gap between the water mist spray support column 34 and the inner wall of the wet dust removal tapered section tube shell 32, so that the boiler flue gas presents a variety of flow rates;

[0143] The inner rod of the gap adjustment driving rod 353 is extended or retracted to drive the gap adjustment telescopic cylinder 352 together with the water mist spraying support column 34 to move along the axis of the wet dust removal advection section tube shell 31, so as to adjust the relative position between the conical tip of the water mist spraying support column 34 and the narrowest part of the wet dust removal tapered section tube shell 32, thereby adjusting the flow gap size of the boiler flue gas;

[0144] The auxiliary centrifugal drive motor 364 is a motor of the prior art. The output shaft of the auxiliary centrifugal drive motor 364 is connected to the auxiliary centrifugal rotating shaft 362 through a planetary reducer 365. The auxiliary centrifugal drive motor 364 drives the auxiliary centrifugal rotating shaft 362 to rotate together with the plurality of auxiliary centrifugal blades 363, so that the boiler flue gas forms a local vortex in the wet dust removal expansion section tube shell 33. Under the centrifugal action, it is conducive to forcing the water mist adsorbed with dust particles to settle and accumulate on the inner wall of the wet dust removal expansion section tube shell 33. The dust particles settled and accumulated on the inner wall of the wet dust removal expansion section tube shell 33 and the mixture of the water mist form dust particle sludge.

[0145] The wet dust scraper rotating ring 372 is driven by a prior art motor fixed on the inner wall of the wet dust removal expansion section tube shell 33 through gear transmission to rotate around the axis of the wet dust scraper support ring 371, and a plurality of wet dust scrapers 373 are used to shovel off the dust particles and sludge settled on the inner wall of the wet dust removal expansion section tube shell 33. The dust particles and sludge are finally discharged through a plurality of wet dust scraper exhaust pipes 374 on the lower side of the wet dust removal expansion section tube shell 33, thereby completing the dust removal work of the boiler flue gas. The boiler flue gas after dust removal is finally discharged from the wet dust removal output pipe 330.

Claims

1. A boiler flue gas multi-stage composite dust collector, characterized in that: It comprises a cyclone dust removal mechanism (10) connected to a boiler smoke exhaust pipe (101), an electrostatic dust removal mechanism (20) connected to the cyclone dust removal mechanism (10), and a wet dust removal mechanism (30) connected to the electrostatic dust removal mechanism (20); The cyclone dust removal mechanism (10) comprises a cyclone dust removal circulation shell (100), wherein the cyclone dust removal circulation shell (100) is composed of a cyclone dust removal upper shell (11), a cyclone dust removal middle ring shell (12) and a cyclone dust removal lower shell (13) which are sequentially connected from top to bottom; A dust removal rotating guide cone (14) is rotatably connected in the cyclone dust removal circulation shell (100), and a plurality of cyclone driving blades (140) are fixed on the dust removal rotating guide cone (14); The electrostatic dust removal mechanism (20) comprises an electrostatic dust removal support shell (21), a horizontally extending electrostatic dust removal circulation shell (22) is fixed in the electrostatic dust removal support shell (21), and two parallelly arranged electrostatic dust removal adsorption rollers (23) are rotatably arranged in the electrostatic dust removal circulation shell (22); The wet dust removal mechanism (30) comprises a horizontally arranged wet dust removal circulation shell (300), wherein the wet dust removal circulation shell (300) is composed of a wet dust removal advection section pipe shell (31), a wet dust removal tapered section pipe shell (32), and a wet dust removal expansion section pipe shell (33) which are connected in sequence; A water mist spray support column (34) coaxially arranged therewith is disposed in the wet dust removal tapered section tube shell (32); one end of the water mist spray support column (34) close to the wet dust removal expansion section tube shell (33) is a conical tip; the conical tip of the water mist spray support column (34) is provided with a plurality of water mist spray receiving holes (341); a water mist spray delivery pipe (342) is fixed in the water mist spray receiving hole (341); and a water mist nozzle (343) connected thereto is fixed at the outer end of the water mist spray delivery pipe (342).

2. A boiler flue gas multi-stage composite dust collector according to claim 1, characterized in that: A cyclone dust collection recovery mechanism (15) is provided on the outside of the cyclone dust collection middle section ring shell (12), and the cyclone dust collection recovery mechanism (15) comprises a dust collection recovery ring shell (151) fixed on the outside of the cyclone dust collection middle section ring shell (12), a scraping drive support slide rail (152) coaxially arranged therewith is fixed inside the dust collection recovery ring shell (151), a scraping drive support slider (153) is slidably connected to the scraping drive support slider (152), and a plurality of scraping adsorption strong magnets (154) are fixed on the scraping drive support slider (153); The inner side wall of the cyclone dust collector middle section ring shell (12) is provided with a vertically extending dust scraping support shaft (155), and the upper and lower ends of the dust scraping support shaft (155) are rotatably connected to circumferential scraping support rollers (1550), and the circumferential scraping support rollers (1550) are rollingly supported on the inner side wall of the cyclone dust collector middle section ring shell (12); A plurality of adsorption supporting and cooperating strong magnets (156) are fixed to the side of the dust removal and scraping support shaft (155); A plurality of dust scrapers (157) are fixed on the dust removal and scraping support shaft (155), and one side of the blade of the dust scraper (157) is in press-contact with the inner side wall of the cyclone dust removal middle section ring shell (12); A recovery compression tube shell (161) extending radially is fixed inside the dust collection and recovery ring shell (151); a recovery compression through groove (1610) communicating with the inside of the recovery compression tube shell (161) is provided on the inner side wall of the cyclone dust collection middle ring shell (12); two vertically penetrating compression partition connecting grooves (1611) are provided on the top of the recovery compression tube shell (161); a recovery compression partition (162) is slidably connected inside the compression partition connecting groove (1611); A partition driving accommodating shell (1621) with an opening facing downward is fixed at the top of the recovery compression tube shell (161) at the compression partition connecting slide groove (1611), a partition driving lifting shell (1622) is slidably connected inside the partition driving accommodating shell (1621), the lower end of the partition driving lifting shell (1622) is fixedly connected to the top of the recovery compression partition (162), and a partition lifting driving rod (1623) for driving the partition driving lifting shell (1622) to move is provided inside the partition driving accommodating shell (1621); The top of the recovery compression tube shell (161) is provided with a compression drive rod connection hole (1612) which passes vertically therethrough, a recovery compression connecting rod (163) is slidably connected in the compression drive rod connection hole (1612), and a recovery compression driving plate (164) is fixed to one end of the recovery compression connecting rod (163) located in the recovery compression tube shell (161); A compression drive accommodating shell (1631) with an opening facing downward is fixed at the top of the recovery compression tube shell (161) at the compression drive rod connecting hole (1612), and a recovery compression drive rod (1632) for driving the recovery compression connecting rod (163) to move is arranged in the compression drive accommodating shell (1631); A filter partition plate (165) is fixed to one end of the recovery compression tube shell (161) away from the cyclone dust collector middle ring shell (12); The filter separation plate (165) is a porous hollow structure with two sides communicating with each other, and a separation filter screen (1650) is fixed on the side of the filter separation plate (165); A compression block recovery box (166) is fixed to the lower side of the dust removal recovery ring shell (151), and a compression recovery drop hole (1660) connected to the compression quick recovery box (166) is provided at the bottom of the recovery compression tube shell (161); A drop hole opening and closing mechanism (17) is provided at the compression recovery drop hole (1660) in the compression quick recovery box (166), and the drop hole opening and closing mechanism (17) includes a drop hole opening and closing cover plate (171) slidably connected to the compression recovery drop hole (1660), and a drop hole opening and closing driving rod (172) for driving the drop hole opening and closing cover plate (171) to move is provided at the top of the compression quick recovery box (166).

3. The boiler flue gas multi-stage composite dust collector according to claim 1, characterized in that: A cyclone drive support plate (18) is fixed inside the cyclone dust collector lower section shell (13), a cyclone drive accommodating shell (19) is fixed on the top of the cyclone drive support plate (18), a vertically extending cyclone drive shaft (141) is fixed on the dust collector rotating guide cone (14), a vertically penetrating cyclone shaft connecting hole (191) is provided on the top of the cyclone drive accommodating shell (19), the cyclone drive shaft (141) is rotatably engaged in the cyclone shaft connecting hole (191), and a cyclone drive motor (192) for driving the cyclone drive shaft (141) to rotate is fixed inside the cyclone drive accommodating shell (19); The cyclone driving support plate (18) is provided with a plurality of cyclone dust removal guide holes (180).

4. The boiler flue gas multi-stage composite dust collector according to claim 1, characterized in that: An electrostatic dust recovery shell (24) extending parallel to the axis of the electrostatic dust adsorption roller (23) is provided between the two electrostatic dust recovery rollers (23); a plurality of electrostatic dust scrapers (241) are fixed to the side of the electrostatic dust recovery shell (24) close to the electrostatic dust adsorption roller (23); one side of the blade of the electrostatic dust scraper (241) is in press-contact cooperation with the outer side wall of the electrostatic dust adsorption roller (23); The side of the electrostatic dust collection and recovery shell (24) close to the electrostatic dust collection and adsorption drum (23) has a plurality of electrostatic dust collection and recovery through holes (240) communicating with each other inside and outside; The electrostatic dust collection recovery shell (24) is connected to an electrostatic dust collection recovery box (25) via an electrostatic dust collection external exhaust pipe (251), and the electrostatic dust collection recovery box (25) is connected to an electrostatic dust collection vacuum pump (252). The input end of the electrostatic dust collection vacuum pump (252) is connected to the inside of the electrostatic dust collection box (25) via a pipeline.

5. The boiler flue gas multi-stage composite dust collector according to claim 1, characterized in that: The two ends of the electrostatic dust removal adsorption roller (23) are provided with roller support end shells (231), and the roller support end shells (231) are fixedly connected to the inner side wall of the electrostatic dust removal support shell (21) via a fixed connecting plate. The rotating shaft of the electrostatic dust removal adsorption roller (23) is rotatably connected and extends into the interior of the roller support end shell (231), and a roller drive motor (232) for driving the rotating shaft of the electrostatic dust removal adsorption roller (23) to rotate is fixed in the roller support end shell (231).

6. The boiler flue gas multi-stage composite dust collector according to claim 1, characterized in that: The two ends of the outer wall of the electrostatic precipitator circulation shell (22) and the inner wall of the electrostatic precipitator support shell (21) are sealed and connected via a dust collection circulation sealing ring (210); The outer side wall of the electrostatic precipitator circulation shell (22) is fixed with a plurality of electric field balancing ring plates (220) arranged in parallel with each other.

7. The boiler flue gas multi-stage composite dust collector according to claim 1, characterized in that: The inner wall of the electrostatic dust removal support shell (21) is fixed with a dust collection recovery support slide rail (261) extending around the inner wall of the electrostatic dust removal support shell (21), and the dust collection recovery support slide rail (261) is slidably connected with a dust collection recovery support slider (262). The dust collection recovery support slider (262) is fixed with an inner wall scraping recovery shell (27) extending parallel to the axis of the electrostatic dust removal adsorption roller (23). A plurality of inner wall recovery scrapers (271) are fixed to a side of the inner wall scraping recovery shell (27) close to the inner wall of the electrostatic dust removal circulation shell (22), and a blade side of the inner wall recovery scraper (271) is in press-contact cooperation with the inner wall of the electrostatic dust removal circulation shell (22). A plurality of inner wall scraping recovery through holes (270) communicating with the inside and outside of the inner wall scraping recovery shell (27) are provided on a side of the inner wall of the electrostatic dust removal circulation shell (22); The inner wall scraping recovery shell (27) is connected to the electrostatic dust collection recovery box (25) via an inner wall scraping discharge pipe.

8. The boiler flue gas multi-stage composite dust collector according to claim 1, characterized in that: A circulation gap adjustment mechanism (35) is provided in the wet dust removal advection section tube shell (31), and the circulation gap adjustment mechanism (35) comprises a gap adjustment fixing cylinder (351) fixed in the wet dust removal advection section tube shell (31) and arranged coaxially therewith, a gap adjustment telescopic cylinder (352) is slidably connected to the outer side of the gap adjustment fixing cylinder (351), and the outer end of the gap adjustment telescopic cylinder (352) is fixedly connected to the water mist spraying support column (34); A gap adjustment driving rod (353) for driving the gap adjustment telescopic cylinder (352) to move is arranged inside the gap adjustment fixed cylinder (351).

9. The boiler flue gas multi-stage composite dust collector according to claim 1, characterized in that: An auxiliary centrifugal mechanism (36) is provided in the wet dust removal expansion section tube shell (33), and the auxiliary centrifugal mechanism (36) comprises a centrifugal drive accommodating shell (361) fixed in the wet dust removal expansion section tube shell (33) and arranged coaxially therewith, an auxiliary centrifugal rotating shaft (362) is rotatably connected to the centrifugal drive accommodating shell (361), and a plurality of auxiliary centrifugal blades (363) are fixed to the auxiliary centrifugal rotating shaft (362); An auxiliary centrifugal drive motor (364) is fixed in the centrifugal drive housing (361), and the output shaft of the auxiliary centrifugal drive motor (364) is transmission-connected to the auxiliary centrifugal rotating shaft (362) via a planetary reducer (365).

10. The boiler flue gas multi-stage composite dust collector according to claim 1, characterized in that: A wet dust scraping mechanism (37) is provided in the wet dust removal expansion section tube shell (33), and the wet dust scraping mechanism (37) comprises a wet dust scraping support ring (371) fixed to the inner side wall of the wet dust removal expansion section tube shell (33) and arranged coaxially therewith, a wet dust scraping rotating ring (372) is rotatably connected to the wet dust scraping support ring (371), and a plurality of wet dust scraping plates (373) are fixed to the wet dust scraping rotating ring (372), and the side edges of the wet dust scraping plates (373) are in contact with and cooperate with the inner side wall of the wet dust removal expansion section tube shell (33); A plurality of wet dust scraping and exhaust pipes (374) connected to the interior of the wet dust removal expansion section tube shell (33) are fixed to the lower side of the wet dust removal expansion section tube shell (33).

Images