Dedusting and desulfurizing tower

Abstract

The invention relates to the technical field of waste gas treatment, and discloses a dust removal desulfurization tower which comprises a desulfurization tower body, a flue gas input port and a flue gas output port are formed in one side and the top of the bottom of the desulfurization tower body correspondingly, and a pumping device and a liquid medicine box are arranged on the other side of the bottom of the desulfurization tower body; the pump conveying device can convey purified liquid medicine in the liquid medicine box into the desulfurizing tower body, a first annular sleeve frame, a power output device and an auxiliary annular plate are arranged in the desulfurizing tower body in a sleeved mode, and a supporting rod is installed between the top of the power output device and the bottom of the first annular sleeve frame. The dust removal and desulfurization tower is matched with an SNCR-SCR combined denitration device, an electrostatic dust collector, an activated carbon adsorption device, a bag-type dust collector, a wet electrostatic dust collector and other devices to form a multi-treatment device for flue gas treatment, compounds and dust in flue gas can be subjected to inlet and outlet multi-purification treatment in the subsequent use process, and then the excellent environment-friendly treatment effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, in particular to a dust removal and desulfurization tower. Background Art

[0002] With the acceleration of industrialization, atmospheric pollutants produced by coal burning and other sources have had a serious impact on the environment. For example, in coal-fired power plants, the dust and sulfides in the flue gas produced by boiler combustion can cause serious damage to the environment and the health of operators.

[0003] At present, with the efforts of relevant researchers, some equipment and technologies for flue gas purification have been made public. Common ones include electrostatic precipitators, bag-type dust collectors, wet electrostatic precipitators, and desulfurization towers. Among them, electrostatic precipitators use high-voltage electric fields to charge dust particles and deposit them on dust collecting plates, which can effectively remove large particles of dust; bag-type dust collectors rely on the formation of a dust layer on the surface of the filter material to capture finer particles, and have a higher capture efficiency for micron-level dust; wet electrostatic precipitators use water mist spraying or circulating liquid washing to further improve the removal rate of fine particles and harmful gases under the action of electricity, and desulfurization towers use stone In the limestone-gypsum flue gas desulfurization technology, SO2 in the flue gas reacts with the limestone slurry pumped into the tower to form gypsum, thereby achieving desulfurization. However, although these four methods have their own advantages, they also have obvious limitations. For example, the electrostatic precipitator is not effective in removing fine particles, the bag filter is prone to clogging and has high maintenance costs, and the wet electrostatic precipitator consumes more energy as the load increases. The structure for atomizing and conveying the limestone slurry inside the desulfurization tower is mostly a fixed operating structure, which is prone to purification dead corners and affects the treatment effect of the overall purification process. Therefore, it is particularly important to develop a new type of dust removal and desulfurization tower that is efficient, economical, and environmentally friendly. Summary of the invention

[0004] 1. Technical problems solved The present invention provides a dust removal and desulfurization tower, which solves the problems raised in the above background technology.

[0005] (II) Technical solution The present invention provides the following technical solution: a dust removal and desulfurization tower, comprising a desulfurization tower body, a flue gas inlet and a flue gas outlet respectively arranged on one side of the bottom and the top of the desulfurization tower body, a pumping device and a liquid medicine tank are arranged on the other side of the bottom of the desulfurization tower body, and the pumping device can transport the purified liquid medicine in the liquid medicine tank to the inside of the desulfurization tower body; The interior of the desulfurization tower body is sleeved with a first annular frame, a power output device, and an auxiliary ring plate, and a support rod is installed between the top of the power output device and the bottom of the first annular frame. The inner side of the first annular frame is sleeved with a hollow ring plate through a bearing, and a transmission gear and an internal gear ring are movably sleeved, and the transmission gear and the internal gear ring are meshed with each other for transmission. The output end of the power output device is connected to the middle of the transmission gear, and the internal gear ring is nested on the inner side of the bottom of the hollow ring plate. A hollow conical guide tube is clamped on the inner side of the top of the hollow ring plate, and one end of the hollow conical guide tube is connected to the output end of the pumping device. A plurality of atomizing pipes are installed in the middle of the hollow ring plate; A second annular frame is mounted on the inner side of the auxiliary ring plate through a bearing sleeve, a first protective filter is nested inside the second annular frame, and a combination of the second annular frame and the first protective filter inside the second annular frame is located between the smoke inlet and the smoke outlet.

[0006] Preferably, the front end structure of the desulfurization tower body is fixedly mounted with an observation tube communicated with its own space, and a transparent cover is installed on the front end port of the observation tube by screws, thereby maintaining the sealing of the overall desulfurization tower body device while providing the user with conditions for direct observation from the outside of the device.

[0007] Preferably, the power output device includes a dual-axis motor and a protective casing, the protective casing is sleeved on the outside of the dual-axis motor, and the two ends of the support rod are respectively fixedly connected to the top of the protective casing and the bottom of the first annular casing, and the first annular casing is fixedly sleeved inside the desulfurization tower body.

[0008] Preferably, the dual-axis motor adopts a dual-axis motor to meet the use requirements of output in multiple directions, and the two output ends of the dual-axis motor respectively pass through the top and the bottom of the protective shell, and the output end of the dual-axis motor and the protective shell are nested with shaft sealing rings at the fitting place to ensure the sealing effect of the structural connection, and the middle part of the transmission gear is transmission-connected to the top output end of the dual-axis motor.

[0009] Preferably, several of the atomizing pipe fittings include square tubes, one end of which is fixedly sleeved on the inner side of the middle part of the hollow ring plate, and the bottom of the other end of the square tube is provided with no less than two atomizing nozzles which output toward the top of the auxiliary ring plate, and the auxiliary ring plate is fixedly sleeved on the inside of the desulfurization tower body.

[0010] Preferably, the cross-section of the second annular sleeve is a V-shaped structure, and a collecting component is provided at the bottom of the internal structure of the second annular sleeve, the transition sleeve includes a transition sleeve and a collecting cylinder, the top of the transition sleeve is fixedly sleeved inside the structure of the second annular sleeve and communicates with the outer space of the top of the second annular sleeve, the inner side of the bottom of the transition sleeve is threadedly connected to the top opening of the collecting cylinder, and a second protective filter is nested in the inner wall of the collecting cylinder, the collecting component can provide centralized collection conditions for impurities filtered out by the second annular sleeve and the first protective filter inside the second annular sleeve, which is convenient for subsequent replacement and cleaning, and maintains the continuous use effect of the overall device.

[0011] Preferably, a limiting threaded hole is provided on the top of the auxiliary ring plate, and a clearance groove that can be aligned with the limiting threaded hole is provided in the outer ring structure of the second annular sleeve. The auxiliary ring plate and the second annular sleeve can be installed between the limiting threaded hole by screws passing through the clearance groove and then threaded into the limiting threaded hole, thereby ensuring the stability of the auxiliary ring plate and the second annular sleeve during combined use.

[0012] Preferably, the output end at the bottom of the dual-axis motor is transmission-connected to a transition transmission shaft, one end of the transition transmission shaft is transmission-connected to a brush cleaning assembly, the brush cleaning assembly is composed of a brush handle and a plurality of brush strips fixedly connected to the bottom of the brush handle, the bottoms of the plurality of brush strips can be movably contacted with corresponding positions at the top of the second annular sleeve, the brush cleaning assembly can link with the transition transmission shaft and the power output device, and then clean the first protective filter screen inside the second annular sleeve in an automatically rotating state.

[0013] Preferably, a buffer groove is provided in the middle of the brush handle to reduce the resistance during subsequent rotation, and the plurality of brush strips are made of rubber material to avoid scratches during cleaning.

[0014] A flue gas purification method involving a dust removal and desulfurization tower comprises the following steps: S1. Flue gas pretreatment; The flue gas produced by combustion carries a large amount of bed material and turns through the furnace top. It passes through the two flue gas outlets located on the upper part of the rear wall water-cooled wall and enters two high-efficiency cyclone separators for gas-solid separation. After separation, the clean flue gas containing a small amount of fly ash enters the vertical shaft behind the furnace to release heat to the high-temperature superheater, low-temperature superheater, economizer, and air preheater arranged therein. The coarser particles of unburned ember separated by the high-efficiency cyclone separator directly enter the furnace through the return device for cyclic reburning, forming a material circulation loop. S2, initial purification of electrostatic dust removal process; The pre-treated flue gas is transported to an electrostatic precipitator for electrostatic dust removal and purification, and activated carbon can be set in the electrostatic precipitator to adsorb and remove dioxins in the flue gas; S3, secondary purification of bag dust removal process; Next, the flue gas after the initial treatment is passed through a bag filter for secondary dust removal; S4, tertiary purification of dust removal and desulfurization tower; The flue gas after the secondary dust removal is extracted through the existing induced draft fan and transported to the flue gas inlet, and enters the desulfurization tower body through the flue gas inlet. At the same time, the pumping device is activated, and the purification liquid in the liquid tank is pumped into the hollow conical guide pipe by the pumping device. The purification liquid is selected as limestone slurry, and then it is atomized and diffused through the hollow ring plate and several atomizing pipe fittings, and then fully contacted and reacted with the flue gas entering the desulfurization tower body to achieve purification and dust reduction effects, while avoiding the occurrence of dead corners of contact. During the output process of the hollow ring plate and several atomizing pipe fittings, the power output device can be used to drive the transmission gear, and then the transmission gear can be meshed with the internal gear ring and drive the hollow ring plate and several atomizing pipe fittings to rotate synchronously to diffuse the purification liquid, thereby avoiding the occurrence of purification dead corners.

[0015] S5, four purifications of dust removal and desulfurization tower; The desulfurized flue gas is transported to the wet electrostatic precipitator through the flue gas outlet for further dust removal; S6, purified gas emission; The flue gas after multiple purification can be discharged into the ambient atmosphere through the existing sleeve-type fiberglass wet chimney, reducing pollution to the environment.

[0016] Beneficial Effects The present invention has the following beneficial effects: 1. The dust removal and desulfurization tower is equipped with SNCR-SCR combined denitrification device, electrostatic precipitator, activated carbon adsorption, bag filter, wet electrostatic precipitator and other devices to form a multiple treatment device for flue gas treatment. In the subsequent use process, it can perform multiple purification treatments on the compounds and dust in the flue gas, thereby achieving excellent environmental protection treatment effect.

[0017] 2. The dust removal and desulfurization tower, the power output device, the first annular frame, the hollow ring plate, the hollow conical guide pipe, the atomizing pipe, the transmission gear, the internal gear ring transition transmission shaft, the brush assembly, the auxiliary ring plate and the second annular frame, and the collecting component arranged inside it will form a multifunctional purification mechanism. During subsequent use, in addition to the power output device fully diffusing the liquid through the transmission gear, the internal gear ring meshing transmission hollow ring plate, and the atomizing pipe to ensure the contact treatment effect on the sulfide in the flue gas, the power output device can also automatically clean the second annular frame and the first protective filter arranged in the second annular frame through the transition transmission shaft transmission brush assembly, thereby maintaining the sustainable use effect of the second annular frame and the first protective filter arranged in the second annular frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 It is a front view schematic diagram of the desulfurization tower body of the present invention; Figure 3 is an enlarged schematic diagram of the first annular frame of the present invention; Figure 4 is a cross-sectional schematic diagram of the second annular sleeve of the present invention; Figure 5 For the present invention Figure 4 The enlarged schematic diagram of point A in the middle; Figure 6 For the present invention Figure 4 A magnified schematic diagram of point B in the middle.

[0019] In the figure: 1. desulfurization tower body; 2. flue gas inlet; 3. flue gas outlet; 4. liquid medicine tank; 5. pumping device; 6. first annular sleeve; 7. hollow ring plate; 8. hollow conical guide pipe; 9. atomizing pipe fittings; 91. square tube; 92. atomizing nozzle; 10. power output device; 101. dual-axis motor; 102. protective casing; 11. transmission gear; 12. internal gear ring; 13. auxiliary ring plate; 14. second annular sleeve; 15. transition transmission shaft; 16. cleaning brush assembly; 17. collecting component; 171. transition sleeve; 172. collecting barrel. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1 See also Figure 1-5 A dust removal and desulfurization tower comprises a desulfurization tower body 1, a flue gas inlet 2 and a flue gas outlet 3 are respectively arranged on one side and the top of the bottom of the desulfurization tower body 1, a pumping device 5 and a liquid medicine tank 4 are arranged on the other side of the bottom of the desulfurization tower body 1, and the pumping device 5 can transport the purified liquid medicine in the liquid medicine tank 4 to the inside of the desulfurization tower body 1, and the front end structure of the desulfurization tower body 1 is fixedly sleeved with an observation tube communicated with its own space, and the front end port of the observation tube is installed with a transparent cover plate by screws, thereby maintaining the sealing of the entire desulfurization tower body 1 while providing a user with a use condition of directly observing from the outside of the device; The desulfurization tower body 1 is internally mounted with a first annular frame 6, a power output device 10, and an auxiliary ring plate 13, and a support rod is installed between the top of the power output device 10 and the bottom of the first annular frame 6, and the inner side of the first annular frame 6 is respectively mounted with a hollow ring plate 7 through a bearing, and a transmission gear 11 and an inner gear ring 12 are movably sleeved, and the transmission gear 11 and the inner gear ring 12 are meshed with each other for transmission, and the output end of the power output device 10 is transmission-connected with the middle part of the transmission gear 11, and the inner gear ring 12 is nested on the inner side of the bottom of the hollow ring plate 7; The power output device 10 includes a dual-axis motor 101 and a protective casing 102. The protective casing 102 is sleeved on the outside of the dual-axis motor 101, and the two ends of the support rod are respectively fixedly connected to the top of the protective casing 102 and the bottom of the first annular casing 6. The first annular casing 6 is fixedly sleeved inside the desulfurization tower body 1. The dual-axis motor 101 adopts a dual-axis motor to meet the use requirements of output in multiple directions, and the two output ends of the dual-axis motor respectively penetrate the top and the bottom of the protective casing 102. A shaft sealing ring is embedded at the sleeve of the output end of the dual-axis motor and the protective casing 102 to ensure the sealing effect of the structural connection. The middle part of the transmission gear 11 is transmission-connected to the top output end of the dual-axis motor 101; A hollow conical guide tube 8 is clamped on the inner side of the top of the hollow ring plate 7, one end of which is connected to the output end of the pumping device 5. A plurality of atomizing pipes 9 are installed in the middle of the hollow ring plate 7. The plurality of atomizing pipes 9 include a square tube 91. One end of the square tube 91 is fixedly sleeved on the inner side of the middle of the hollow ring plate 7. The bottom of the other end of the square tube 91 is sleeved with at least two atomizing nozzles 92 that are output toward the top of the auxiliary ring plate 13. The auxiliary ring plate 13 is fixedly sleeved inside the desulfurization tower body 1. A second annular frame 14 is mounted on the inner side of the auxiliary ring plate 13 through a bearing sleeve, a first protective filter is nested inside the second annular frame 14, and the assembly formed by the second annular frame 14 and the first protective filter inside the second annular frame 14 is located between the smoke inlet 2 and the smoke outlet 3.

[0022] A flue gas purification method involving a dust removal and desulfurization tower comprises the following steps: S1. Flue gas pretreatment; The flue gas produced by combustion carries a large amount of bed material and turns through the furnace top. It passes through the two flue gas outlets located on the upper part of the rear wall water-cooled wall and enters two high-efficiency cyclone separators for gas-solid separation. After separation, the clean flue gas containing a small amount of fly ash enters the vertical shaft behind the furnace to release heat to the high-temperature superheater, low-temperature superheater, economizer, and air preheater arranged therein. The coarser particles of unburned ember separated by the high-efficiency cyclone separator directly enter the furnace through the return device for cyclic reburning, forming a material circulation loop. S2, initial purification of electrostatic dust removal process; The pre-treated flue gas is transported to an electrostatic precipitator for electrostatic dust removal and purification, and activated carbon can be set in the electrostatic precipitator to adsorb and remove dioxins in the flue gas; S3, secondary purification of bag dust removal process; Next, the flue gas after the initial treatment is passed through a bag filter for secondary dust removal; S4, tertiary purification of dust removal and desulfurization tower; The flue gas after the secondary dust removal is extracted by the existing induced draft fan and transported to the flue gas input port 2, and enters the desulfurization tower body 1 through the flue gas input port 2. At the same time, the pumping device 5 is activated, and the pumping device 5 pumps the purified liquid medicine in the liquid medicine tank 4 into the hollow conical guide pipe 8, and the purified liquid medicine is selected as limestone slurry, and then it is atomized and diffused through the hollow ring plate 7 and a plurality of atomizing pipe fittings 9, and then fully contacts and reacts with the flue gas entering the desulfurization tower body 1 to achieve the purification and dust reduction effect, and avoid the occurrence of contact dead corners. During the output process of the hollow ring plate 7 and a plurality of atomizing pipe fittings 9, the power output device 10 can be used to drive the transmission gear 11, and then the transmission gear 11 can be meshed with the internal gear ring 12 and drive the hollow ring plate 7 and a plurality of atomizing pipe fittings 9 to rotate synchronously to diffuse the purified liquid medicine, so as to avoid the occurrence of purification dead corners.

[0023] S5, four purifications of dust removal and desulfurization tower; The desulfurized flue gas is transported to the wet electrostatic precipitator through the flue gas outlet 3 for further dust removal; S6, purified gas emission; The flue gas after multiple purification can be discharged into the ambient atmosphere through the existing sleeve-type fiberglass wet chimney, reducing pollution to the environment.

[0024] Embodiment 2 See also Figure 1-6 A dust removal and desulfurization tower comprises a desulfurization tower body 1, a flue gas inlet 2 and a flue gas outlet 3 are respectively arranged on one side and the top of the bottom of the desulfurization tower body 1, a pumping device 5 and a liquid medicine tank 4 are arranged on the other side of the bottom of the desulfurization tower body 1, and the pumping device 5 can transport the purified liquid medicine in the liquid medicine tank 4 to the inside of the desulfurization tower body 1, and the front end structure of the desulfurization tower body 1 is fixedly sleeved with an observation tube communicated with its own space, and the front end port of the observation tube is installed with a transparent cover plate by screws, thereby maintaining the sealing of the entire desulfurization tower body 1 while providing a user with a use condition of directly observing from the outside of the device; The desulfurization tower body 1 is internally mounted with a first annular frame 6, a power output device 10, and an auxiliary ring plate 13, and a support rod is installed between the top of the power output device 10 and the bottom of the first annular frame 6, and the inner side of the first annular frame 6 is respectively mounted with a hollow ring plate 7 through a bearing, and a transmission gear 11 and an inner gear ring 12 are movably sleeved, and the transmission gear 11 and the inner gear ring 12 are meshed with each other for transmission, and the output end of the power output device 10 is transmission-connected with the middle part of the transmission gear 11, and the inner gear ring 12 is nested on the inner side of the bottom of the hollow ring plate 7; The power output device 10 includes a dual-axis motor 101 and a protective casing 102. The protective casing 102 is sleeved on the outside of the dual-axis motor 101, and the two ends of the support rod are respectively fixedly connected to the top of the protective casing 102 and the bottom of the first annular casing 6. The first annular casing 6 is fixedly sleeved inside the desulfurization tower body 1. The dual-axis motor 101 adopts a dual-axis motor to meet the use requirements of output in multiple directions, and the two output ends of the dual-axis motor respectively penetrate the top and the bottom of the protective casing 102. A shaft sealing ring is embedded at the sleeve of the output end of the dual-axis motor and the protective casing 102 to ensure the sealing effect of the structural connection. The middle part of the transmission gear 11 is transmission-connected to the top output end of the dual-axis motor 101; A hollow conical guide tube 8 is clamped on the inner side of the top of the hollow ring plate 7, one end of which is connected to the output end of the pumping device 5. A plurality of atomizing pipes 9 are installed in the middle of the hollow ring plate 7. The plurality of atomizing pipes 9 include a square tube 91. One end of the square tube 91 is fixedly sleeved on the inner side of the middle of the hollow ring plate 7. The bottom of the other end of the square tube 91 is sleeved with at least two atomizing nozzles 92 that are output toward the top of the auxiliary ring plate 13. The auxiliary ring plate 13 is fixedly sleeved inside the desulfurization tower body 1. A second annular frame 14 is mounted on the inner side of the auxiliary ring plate 13 through a bearing sleeve, a first protective filter is embedded in the second annular frame 14, and a combination formed by the second annular frame 14 and the first protective filter inside the second annular frame 14 is located between the smoke inlet 2 and the smoke outlet 3; The cross section of the second annular frame 14 is a V-shaped structure, and a collecting component 17 is arranged at the bottom of the internal structure of the second annular frame 14. The transition sleeve 171 includes a transition sleeve 171 and a collecting tube 172. The top of the transition sleeve 171 is fixedly sleeved inside the structure of the second annular frame 14 and communicates with the outer space of the top of the second annular frame 14. The bottom inner side of the transition sleeve 171 is threadedly connected to the top mouth of the collecting tube 172, and a second protective filter is embedded in the inner wall of the collecting tube 172. The collecting component 17 can be used for the second annular frame 14 to collect the collected water. The auxiliary ring plate 13 is provided with a limited threaded hole on the top, and a clearance groove that can be aligned with the limited threaded hole is provided in the outer ring structure of the second annular sleeve 14. The auxiliary ring plate 13 and the second annular sleeve 14 can be installed by screws passing through the clearance groove and then threadedly connected to the limited threaded hole for limited installation, thereby ensuring the stability of the auxiliary ring plate 13 and the second annular sleeve 14 during combined use; The output end at the bottom of the dual-axis motor 101 is transmission-connected with a transition transmission shaft 15, and one end of the transition transmission shaft 15 is transmission-connected with a brush cleaning assembly 16. The brush cleaning assembly 16 consists of a brush handle and a plurality of brush strips fixedly connected to the bottom of the brush handle. The bottoms of the plurality of brush strips can movably contact with the corresponding positions on the top of the second annular sleeve 14. The brush cleaning assembly 16 can link the transition transmission shaft 15 and the power output device 10, and then clean the first protective filter screen inside the second annular sleeve 14 in an automatically rotating state. A buffer groove is provided in the middle of the brush handle to reduce the resistance during subsequent rotation, and the plurality of brush strips are made of rubber material to avoid scratches during cleaning.

[0025] A flue gas purification method involving a dust removal and desulfurization tower comprises the following steps: S1. Flue gas pretreatment; The flue gas produced by combustion carries a large amount of bed material and turns through the furnace top. It passes through the two flue gas outlets located on the upper part of the rear wall water-cooled wall and enters two high-efficiency cyclone separators for gas-solid separation. After separation, the clean flue gas containing a small amount of fly ash enters the vertical shaft behind the furnace to release heat to the high-temperature superheater, low-temperature superheater, economizer, and air preheater arranged therein. The coarser particles of unburned ember separated by the high-efficiency cyclone separator directly enter the furnace through the return device for cyclic reburning, forming a material circulation loop. In addition, during the process of flue gas generation and initial output, the NOx content in the flue gas is reduced through the SNCR-SCR combined denitrification device. Specifically, the SNCR system includes receiving and storing the reducing agent, metering output, mixing and diluting with water, injecting the diluted reducing agent at a suitable position of the boiler, and mixing the reducing agent with the flue gas for denitrification reaction; The SCR system includes setting an SCR bypass flue at the rear side of the boiler economizer flue, arranging an SCR catalyst and an ammonia spray pipe, and the flue gas passes through the SCR catalyst and the second economizer and then returns to the inlet of the third economizer of the boiler; S2, initial purification of electrostatic dust removal process; The pre-treated flue gas is transported to an electrostatic precipitator for electrostatic dust removal and purification, and activated carbon can be set in the electrostatic precipitator to adsorb and remove dioxins in the flue gas; S3, secondary purification of bag dust removal process; Next, the flue gas after the initial treatment is passed through a bag filter for secondary dust removal; S4, tertiary purification of dust removal and desulfurization tower; The flue gas after the secondary dust removal is extracted by the existing induced draft fan and transported to the flue gas input port 2, and enters the desulfurization tower body 1 through the flue gas input port 2. At the same time, the pumping device 5 is activated, and the pumping device 5 pumps the purified liquid medicine in the liquid medicine tank 4 into the hollow conical guide pipe 8, and the purified liquid medicine is selected as limestone slurry, and then it is atomized and diffused through the hollow ring plate 7 and a plurality of atomizing pipe fittings 9, and then fully contacts and reacts with the flue gas entering the desulfurization tower body 1 to achieve the purification and dust reduction effect, and avoid the occurrence of contact dead corners. During the output process of the hollow ring plate 7 and a plurality of atomizing pipe fittings 9, the power output device 10 can be used to drive the transmission gear 11, and then the transmission gear 11 can be meshed with the internal gear ring 12 and drive the hollow ring plate 7 and a plurality of atomizing pipe fittings 9 to rotate synchronously to diffuse the purified liquid medicine, so as to avoid the occurrence of purification dead corners.

[0026] S5, four purifications of dust removal and desulfurization tower; The desulfurized flue gas is transported to the wet electrostatic precipitator through the flue gas outlet 3 for further dust removal; S6, purified gas emission; The flue gas after multiple purification can be discharged into the ambient atmosphere through the existing sleeve-type glass fiber reinforced plastic wet chimney, reducing pollution to the environment; S7, automatic cleaning of the interior of the desulfurization tower body 1; SO2 in the flue gas reacts with limestone slurry to generate gypsum, which will be filtered by the first protective filter inside the second annular frame 14 and temporarily stored. In order to avoid the first protective filter from being blocked, the dual-axis motor 101 can be started after the desulfurization tower body 1 has been used for a certain period of time. The output end of the dual-axis motor 101 corresponding to the transition transmission shaft 15 drives the cleaning component 16 to rotate synchronously through the transition transmission shaft 15, and then the cleaning component 16 automatically cleans the top of the second annular frame 14 and the top of the first protective filter inside the second annular frame 14, and then the gypsum impurities temporarily stored on the top of the first protective filter are mainly sent to the inside of the collecting tube 172 for cleaning. The transition sleeve 171 provides a transition channel, thereby maintaining the sustainable use effect of the second annular frame 14 and the first protective filter inside it.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust removal and desulfurization tower, comprising a desulfurization tower body (1), a flue gas inlet (2) and a flue gas outlet (3) respectively arranged on one side of the bottom and the top of the desulfurization tower body (1), a pumping device (5) and a liquid medicine tank (4) are arranged on the other side of the bottom of the desulfurization tower body (1), and the pumping device (5) can transport the purified liquid medicine in the liquid medicine tank (4) to the inside of the desulfurization tower body (1); The desulfurization tower body (1) is internally sleeved with a first annular frame (6), a power output device (10), and an auxiliary ring plate (13), and a support rod is installed between the top of the power output device (10) and the bottom of the first annular frame (6); the inner side of the first annular frame (6) is sleeved with a hollow ring plate (7) through a bearing, and a transmission gear (11) and an internal gear ring (12) are movably sleeved, and the transmission gear (11) and the internal gear ring (12) are meshed with each other for transmission; the output end of the power output device (10) is transmission-connected with the middle of the transmission gear (11); the internal gear ring (12) is nested on the inner side of the bottom of the hollow ring plate (7); a hollow conical guide tube (8) is clamped on the inner side of the top of the hollow ring plate (7); one end of the hollow conical guide tube (8) is connected to the output end of the pumping device (5); and a plurality of atomizing pipes (9) are installed in the middle of the hollow ring plate (7); A second annular sleeve (14) is mounted on the inner side of the auxiliary ring plate (13) via a bearing sleeve, a first protective filter screen is nested inside the second annular sleeve (14), and a combination formed by the second annular sleeve (14) and the first protective filter screen inside the second annular sleeve (14) is located between the smoke inlet (2) and the smoke outlet (3).

2. A dust removal and desulfurization tower according to claim 1, characterized in that: The front end structure of the desulfurization tower body (1) is fixedly sleeved with an observation tube that is in communication with the space of the desulfurization tower body, and a transparent cover plate is mounted on the front end port of the observation tube via screws.

3. A dust removal and desulfurization tower according to claim 1, characterized in that: The power output device (10) comprises a dual-axis motor (101) and a protective casing (102), wherein the protective casing (102) is sleeved on the outside of the dual-axis motor (101), and two ends of a support rod are respectively fixedly connected to the top of the protective casing (102) and the bottom of a first annular casing (6), and the first annular casing (6) is fixedly sleeved inside the desulfurization tower body (1).

4. A dust removal and desulfurization tower according to claim 3, characterized in that: The dual-axis motor (101) adopts a dual-axis motor, and the two output ends of the dual-axis motor respectively penetrate the top of the protective casing (102) and the bottom of the protective casing (102), and a shaft sealing ring is embedded at the place where the output end of the dual-axis motor and the protective casing (102) are fitted, and the middle part of the transmission gear (11) is transmission-connected to the top output end of the dual-axis motor (101).

5. A dust removal and desulfurization tower according to claim 1, characterized in that: Several of the atomizing pipes (9) include a square tube (91), one end of the square tube (91) is fixedly sleeved on the inner side of the middle of the hollow ring plate (7), and the bottom of the other end of the square tube (91) is sleeved with no less than two atomizing nozzles (92) that output toward the top of the auxiliary ring plate (13), and the auxiliary ring plate (13) is fixedly sleeved inside the desulfurization tower body (1).

6. A dust removal and desulfurization tower according to claim 1, characterized in that: The cross section of the second annular sleeve (14) is a V-shaped structure, and a collecting component (17) is arranged at the bottom of the internal structure of the second annular sleeve (14), the transition sleeve (171) comprises a transition sleeve (171) and a collecting tube (172), the top of the transition sleeve (171) is fixedly sleeved inside the structure of the second annular sleeve (14) and communicates with the outer space of the top of the second annular sleeve (14), the inner side of the bottom of the transition sleeve (171) is threadedly connected to the top opening of the collecting tube (172), and a second protective filter is embedded in the inner wall of the collecting tube (172).

7. A dust removal and desulfurization tower according to claim 1, characterized in that: A limiting threaded hole is provided at the top of the auxiliary ring plate (13), and a clearance groove capable of being aligned with the limiting threaded hole is provided in the outer ring structure of the second annular sleeve (14). The auxiliary ring plate (13) and the second annular sleeve (14) can be installed in a limited position by screws penetrating the clearance groove and then being threadedly connected to the limiting threaded hole.

8. A dust removal and desulfurization tower according to claim 4, characterized in that: The output end at the bottom of the dual-axis motor (101) is drivingly connected to a transition transmission shaft (15), and one end of the transition transmission shaft (15) is drivingly connected to a brush cleaning assembly (16). The brush cleaning assembly (16) is composed of a brush handle and a plurality of brush strips fixedly connected to the bottom of the brush handle, and the bottoms of the plurality of brush strips can movably contact corresponding positions at the top of the second annular sleeve (14).

9. A dust removal and desulfurization tower according to claim 8, characterized in that: A buffer groove running through the brush handle is provided in the middle of the brush handle, and a plurality of brush strips are made of rubber material.

10. A flue gas purification method involving a dust removal and desulfurization tower as claimed in any one of claims 1 to 9, characterized in that: The steps include: S1. Flue gas pretreatment; The flue gas produced by combustion carries a large amount of bed material and turns through the furnace top. It passes through the two flue gas outlets located on the upper part of the rear wall water-cooled wall and enters two high-efficiency cyclone separators for gas-solid separation. After separation, the clean flue gas containing a small amount of fly ash enters the vertical shaft behind the furnace to release heat to the high-temperature superheater, low-temperature superheater, economizer, and air preheater arranged therein. The coarser particles of unburned ember separated by the high-efficiency cyclone separator directly enter the furnace through the return device for cyclic reburning, forming a material circulation loop. S2, initial purification of electrostatic dust removal process; The pre-treated flue gas is transported to an electrostatic precipitator for electrostatic dust removal and purification, and activated carbon can be set in the electrostatic precipitator to adsorb and remove dioxins in the flue gas; S3, secondary purification of bag dust removal process; Next, the flue gas after the initial treatment is passed through a bag filter for secondary dust removal; S4, tertiary purification of dust removal and desulfurization tower; The flue gas after secondary dust removal is extracted by an existing induced draft fan and transported to the flue gas input port (2), and enters the desulfurization tower body (1) through the flue gas input port (2). At the same time, the pumping device (5) is activated, and the pumping device (5) pumps the purified liquid medicine in the liquid medicine tank (4) into the hollow conical guide pipe (8). The purified liquid medicine is selected as limestone slurry, and then passes through the hollow ring plate (7) and a plurality of atomizing pipes (9) for atomization and diffusion, and then fully contacts and reacts with the flue gas entering the desulfurization tower body (1), thereby achieving purification and dust reduction effects, and avoiding the occurrence of contact dead corners. During the output process of the hollow ring plate (7) and the plurality of atomizing pipes (9), the power output device (10) can be used to drive the transmission gear (11), and then the transmission gear (11) is meshed with the internal gear ring (12) and drives the hollow ring plate (7) and the plurality of atomizing pipes (9) to rotate synchronously and diffuse the purified liquid medicine, thereby avoiding the occurrence of purification dead corners. S5, four purifications of dust removal and desulfurization tower; The desulfurized flue gas is transported to a wet electrostatic precipitator through a flue gas outlet (3) for further dust removal; S6, purified gas emission; The flue gas after multiple purification can be discharged into the ambient atmosphere through the existing sleeve-type fiberglass wet chimney, reducing pollution to the environment.

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