An efficient fully dry dust removal chimney for high-sulfur flue gas of a boiler and its implementation method

Abstract

The present invention discloses a high-efficiency fully dry dust removal hood for high-sulfur flue gas of a boiler and an implementation method thereof, belonging to the technical field of flue gas desulfurization. The high-efficiency fully dry dust removal hood for high-sulfur flue gas of a boiler and the implementation method thereof according to the present invention include a fan hood, and a diversion air box is arranged at the top of the fan hood, and the diversion air box is connected to the fan hood by bolts. In order to solve the problems that the wet desulfurization technology will generate additional sulfide wastewater during the purification process and the purification efficiency that can be achieved by the traditional dry desulfurization technology is lower than that of the wet desulfurization and is easily affected by the contact area and time, the design structure of the butterfly-shaped desulfurization tube group is used to help the flue gas contact with the solid desulfurizer, extend the contact time, expand the contact area, and thus improve the purification efficiency of the dry desulfurization.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization, and in particular to a high-efficiency fully dry dust removal hood for high-sulfur flue gas of a boiler and an implementation method thereof. Background Technique

[0002] Desulfurization refers to fixing the sulfur element in coal by methods such as calcium-based to form a solid to prevent the generation of SO2 during combustion. At present, desulfurization methods can be divided into: wet method, dry method, and semi-dry (semi-wet) method according to the dry and wet states of the absorbent and desulfurization products during the desulfurization process. The wet desulfurization technology uses a solution or slurry containing an absorbent to desulfurize and treat the desulfurization products in a wet state. This method is widely used in the treatment of boiler flue gas or industrial tail gas pollution due to its advantages such as fast desulfurization reaction speed, simple equipment, and high desulfurization efficiency. The utility model with the application number 201621171502.1 discloses a desulfurization and dust removal flue gas purification device. The inner surface of the cylinder body is a rough surface, which can generate more sufficient impacts on the cyclone formed by water droplets and particulate matters in the flue gas, facilitating the mutual collision and agglomeration of tiny particulate matters such as fine liquid droplets, fine dust particles, and aerosols in the flue gas into larger liquid droplets, thereby improving the desulfurization and dust removal efficiency.

[0003] 1) The above technical solution adopts the wet desulfurization technology, and this technology will additionally generate sulfide wastewater during the purification process;

[0004] 2) The purification efficiency that the traditional dry desulfurization technology can achieve is lower than that of the wet desulfurization because the gas cannot ensure long-term contact with the desulfurizing agent, affected by the contact area and time;

[0005] Therefore, it does not meet the existing requirements, and for this reason, we propose a high-efficiency fully dry dust removal hood for high-sulfur flue gas of a boiler and an implementation method thereof. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-efficiency fully dry dust removal hood for high-sulfur flue gas of a boiler and an implementation method thereof, using the design structure of the butterfly-shaped desulfurization pipe group to help the flue gas contact with the solid desulfurizing agent, extend the contact time, expand the contact area, and further improve the purification efficiency of dry desulfurization, so as to solve the problems in the existing technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-efficiency, fully dry dust removal hood for high-sulfur flue gas in a boiler, comprising a fan hood, a guide bellows is arranged on the top of the fan hood, and the guide bellows is connected to the fan hood by bolts, a flue gas duct is arranged on the top of the guide bellows, and an exhaust duct is arranged on the top of the flue gas duct, adapter flanges are arranged at both ends of the flue gas duct, and the adapter flanges are connected to the exhaust duct and the guide bellows by bolts, a metal protective rod is arranged between the adapter flanges, and the metal protective rod is connected to the adapter flange by a slot, circulating steam pipe valves are arranged around the guide bellows, and the circulating steam pipe valves extend to the interior of the guide bellows, and reflux steam pipe valves are arranged around the exhaust duct, and the reflux steam pipe valves extend to the interior of the exhaust duct.

[0008] Preferably, a buffer discharge cabin is provided inside the smoke exhaust duct, and a smoke exhaust top window is provided at the bottom of the buffer discharge cabin, an electrically controlled flip gate is provided on the top of the smoke exhaust duct, and the electrically controlled flip gate is rotatably connected to the smoke exhaust duct, a heat insulation layer is provided on the outer surface of the interior of the smoke duct, and a smoke purification lumen is provided on the inner side of the heat insulation layer, and the buffer discharge cabin is connected to the smoke purification lumen through the smoke exhaust top window.

[0009] Preferably, a butterfly desulfurization pipe group is arranged inside the flue gas purification pipe cavity, and the butterfly desulfurization pipe group is connected to the flue gas duct through a bracket, the butterfly desulfurization pipe group includes a butterfly pipe fitting, and there are multiple butterfly pipe fittings, an outer core cavity is arranged inside the butterfly desulfurization pipe group, and a branch axis pipe assembly is arranged below the outer core cavity, the branch axis pipe assembly is arranged in the smoke intake air cavity inside the fan hood, steam manifolds are arranged around the bottom of the branch axis pipe assembly, and the steam manifold is connected to the circulating steam pipe valve through a flange.

[0010] Preferably, a through-joint socket is provided between the butterfly pipe fittings, and a desulfurizer filling is provided inside the butterfly pipe fittings, an inner core cavity is provided inside the butterfly pipe fittings, and a mesh structure is provided on the outer surface of the butterfly pipe fittings, the branch shaft pipe assembly includes a steam duct and a receiving sealing disk, and the receiving sealing disk is welded and connected to the guide bellows, a steam storage chamber is provided inside the steam duct, and the steam manifold extends to the inside of the steam storage chamber.

[0011] Preferably, diversion smoke inlet pipes are provided on both sides of the steam duct, and the diversion smoke inlet pipes are fixedly connected to the receiving sealing plate, one end of the diversion smoke inlet pipe extends to the interior of the inner core cavity, and the other end of the diversion smoke inlet pipe passes through the receiving sealing plate and extends to the interior of the smoking air cavity.

[0012] Preferably, a sealing valve seat is provided on the top of the butterfly desulfurization pipe group, and the sealing valve seat is closely connected to the butterfly desulfurization pipe group, and a one-way solenoid valve is provided on the outer surface of the sealing valve seat, and the one-way solenoid valve extends through and below the sealing valve seat.

[0013] Preferably, a piston seal cover is arranged between the shunt inlet pipes, and a steam sieve tube is arranged below the piston seal cover. The steam sieve tube and the steam conduit are integrally structured, and a steam grid is arranged on the outer surface of the steam sieve tube. A guide shaft is arranged inside the steam sieve tube and is fixedly connected to the steam sieve tube.

[0014] Preferably, a guide chute is arranged inside the guide shaft and extends through both ends of the guide shaft. A floating core piston is arranged at the bottom of the piston seal cover and is fixedly connected to the piston seal cover. The piston seal cover is in fit connection with the guide shaft and is also in fit connection with the steam sieve tube.

[0015] Preferably, metal support rods are arranged around the floating core piston, and the metal support rods are rotationally connected to the piston seal cover through internal threads. An abutting shaft is arranged at the bottom of the metal support rod and is combined with the metal support rod. The metal support rod is slidably connected to the guide shaft through the guide chute.

[0016] An implementation method of a high-efficiency fully dry dust removal smoke hood for high-sulfur flue gas of a boiler comprises the following steps:

[0017] Step 1: A butterfly-shaped pipe fitting is made of a polymer material. After being made, irregular pore structures are distributed inside and on the surface of the butterfly-shaped pipe fitting. Subsequently, a renewable solid desulfurizer is filled into the inside of the butterfly-shaped pipe fitting from the through-connection socket. Then, the through-connection sockets between two groups of butterfly-shaped pipe fittings are abutted and sealed and anchored.

[0018] Step 2: Then, the made butterfly-shaped pipe fittings are assembled into a butterfly-shaped desulfurization pipe group. The gaps between the laminations are also sealed and anchored. Then, the butterfly-shaped desulfurization pipe group is installed inside the flue gas pipeline. One end of its bottom is connected to the shunt shaft pipe assembly, and the top is sealed through a sealing valve seat.

[0019] Step 3: Finally, the fan smoke hood is connected to the flue gas window at the top of the boiler. The flue gas enters the smoking air cavity through the window, and then enters the inner core cavity of the butterfly-shaped desulfurization pipe group upward through the shunt inlet pipes. The flue gas entering the inner core cavity will enter the inside of the butterfly-shaped pipe fitting through the pores and contact the solid desulfurizer, and chemically adsorb the sulfur-containing compounds in the waste gas into the small holes of the desulfurizer.

[0020] Step 4: The flue gas after adsorption and purification enters the outer core cavity and the inside of the flue gas purification pipe cavity, and then enters the inside of the smoke exhaust hopper upward. Open the electric control turning gate plate at the top of the smoke exhaust hopper to discharge the purified flue gas.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The present invention adopts dry desulfurization technology, avoiding the subsequent wastewater treatment link. The blower smoke hood is connected to the flue gas window at the top of the boiler. The flue gas enters the smoking air cavity through the window, and then enters the inner core cavity of the butterfly-shaped desulfurization pipe group upward through the shunt inlet pipe. The flue gas entering the inner core cavity will enter the interior of the butterfly-shaped pipe fitting through the pores and contact the solid desulfurizer. The sulfur-containing compounds in the waste gas are chemically adsorbed into the small holes of the desulfurizer. The flue gas purified by adsorption will enter the interior of the outer core cavity and the flue gas purification pipe cavity, and then enter the interior of the smoke exhaust hopper upward. Open the electric control flip gate at the top of the smoke exhaust hopper to discharge the purified flue gas. The design structure of the butterfly-shaped desulfurization pipe group is used to help the flue gas contact the solid desulfurizer, extend the contact time, expand the contact area, and thus improve the purification efficiency of dry desulfurization;

[0023] 2. In the present invention, the butterfly-shaped desulfurization pipe group is arranged inside the flue gas pipeline. The butterfly-shaped desulfurization pipe group can divide the space inside the flue gas purification pipe cavity into two working areas. The flue gas containing sulfide medium will enter the inner core cavities on both sides of the butterfly-shaped desulfurization pipe group, and then the flue gas passes through the solid desulfurizer inside the butterfly-shaped desulfurization pipe group and escapes outward to the outer core cavity and the peripheral area of the flue gas purification pipe cavity. The flue gas continuously tumbles inside the inner core cavity, then passes through the pores on its surface and enters the interior to make contact with the solid desulfurizer. The sulfur-containing compounds in the waste gas are chemically adsorbed into the small holes of the desulfurizer, and then escape to the outer core cavity and the peripheral area of the flue gas purification pipe cavity with relatively lower external pressure. The flue gas in the outer core cavity and the flue gas purification pipe cavity can also contact the butterfly-shaped desulfurization pipe group for secondary purification, thus fully ensuring the contact area between the flue gas and the desulfurizer and the purification efficiency;

[0024] 3. In the present invention, when steam enters the interior of the steam conduit, the steam pressure will push the floating core piston and the piston seal cover above upward. When the piston seal cover is pushed out, the steam inside the steam conduit will enter the steam sieve tube area upward, and then enter the outer core cavity through the steam grille on its surface. As long as the steam is in a conveying state, the floating core piston above will always be in a suspended state. The metal support rods around the bottom of the piston seal cover and the abutment shaft at the bottom cooperate to play a role in stretching and limiting the piston. After the steam washing and regeneration of the solid desulfurizer is completed, the steam supply is interrupted, and at this time the piston seal cover will automatically fall to complete the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall front view of the present invention;

[0026] Figure 2 is the overall sectional structure schematic diagram of the present invention;

[0027] Figure 3It is a schematic diagram of the cross-sectional structure of the butterfly desulfurization group tube of the present invention;

[0028] Figure 4 This is a schematic diagram of the butterfly desulfurization tube structure of the present invention;

[0029] Figure 5 It is a schematic diagram of the sealing valve seat structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the split smoke inlet pipe structure of the present invention;

[0031] Figure 7 It is a schematic diagram of the steam screen structure of the present invention.

[0032] In the figure: 1, fan hood; 2, guide bellows; 3, flue gas duct; 4, exhaust hopper; 5, circulating steam pipe valve; 6, reflux steam pipe valve; 7, butterfly desulfurization group pipe; 8, branch shaft pipe assembly; 101, smoke chamber; 301, adapter flange; 302, metal protective rod; 303, thermal insulation layer; 304, flue gas purification chamber; 401, buffer discharge cabin; 402, electric control flip gate; 403, smoke exhaust top window; 701, butterfly pipe fittings; 702, outer core chamber; 703 , plug-in socket; 704, sealing valve seat; 705, one-way solenoid valve; 706, desulfurizer filling; 707, inner core cavity; 801, steam manifold; 802, receiving sealing plate; 803, diversion smoke inlet pipe; 804, piston cover; 805, steam screen; 806, steam duct; 807, steam storage chamber; 8041, floating core piston; 8042, metal support rod; 8043, shaft support; 8051, steam grille; 8052, guide shaft; 8053, guide slide. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1, an embodiment provided by the present invention: a high-efficiency all-dry dust removal smoke hood for high-sulfur flue gas of a boiler, including a fan smoke hood 1. A diversion air box 2 is arranged at the top of the fan smoke hood 1, and the diversion air box 2 is connected to the fan smoke hood 1 by bolts. A flue gas pipe 3 is arranged at the top of the diversion air box 2, and a smoke exhaust hopper 4 is arranged at the top of the flue gas pipe 3. Both ends of the flue gas pipe 3 are provided with adapter flanges 301, and the adapter flanges 301 are connected to the smoke exhaust hopper 4 and the diversion air box 2 by bolts. A metal protection rod 302 is arranged between the adapter flanges 301, and the metal protection rod 302 is connected to the adapter flanges 301 by a card slot. Circulating steam pipe valves 5 are arranged around the diversion air box 2, and the circulating steam pipe valves 5 extend into the interior of the diversion air box 2. Return steam pipe valves 6 are arranged around the smoke exhaust hopper 4, and the return steam pipe valves 6 extend into the interior of the smoke exhaust hopper 4;

[0035] Adopting dry desulfurization technology, the subsequent wastewater treatment link is avoided. The fan smoke hood 1 is connected to the flue gas window at the top of the boiler, and the flue gas enters the smoking air cavity 101 through the window. Subsequently, it passes upward through the shunt inlet pipe 803 and enters the inner core cavity 707 of the butterfly desulfurization group pipe 7. The flue gas entering the inner core cavity 707 will enter the interior of the butterfly pipe fitting 701 through pores and contact with the solid desulfurizer, chemically adsorbing the sulfur-containing compounds in the waste gas into the small holes of the desulfurizer. The flue gas purified by adsorption will enter the outer core cavity 702 and the interior of the flue gas purification pipe cavity 304, and then enter the interior of the smoke exhaust hopper 4 upward. Open the electric control flip gate 402 at the top of the smoke exhaust hopper 4 to discharge the purified flue gas. Utilize the design structure of the butterfly desulfurization group pipe 7 to help the flue gas contact with the solid desulfurizer, extend the contact time, expand the contact area, and thus improve the purification efficiency of dry desulfurization.

[0036] Please refer to Figures 2 - 5 , a buffer discharge chamber 401 is arranged inside the smoke exhaust hopper 4, and a smoke exhaust top window 403 is arranged at the bottom of the buffer discharge chamber 401. An electric control flip gate 402 is arranged at the top of the smoke exhaust hopper 4, and the electric control flip gate 402 is rotatably connected to the smoke exhaust hopper 4. The outer surface of the interior of the flue gas pipe 3 is provided with a heat insulation layer 303, and a flue gas purification pipe cavity 304 is arranged inside the heat insulation layer 303. The buffer discharge chamber 401 is connected to the flue gas purification pipe cavity 304 through the smoke exhaust top window 403. A butterfly desulfurization group pipe 7 is arranged inside the flue gas purification pipe cavity 304, and the butterfly desulfurization group pipe 7 is connected to the flue gas pipe 3 by a bracket. The butterfly desulfurization group pipe 7 includes a butterfly pipe fitting 701, and there are multiple butterfly pipe fittings 701. An outer core cavity 702 is arranged inside the butterfly desulfurization group pipe 7, and a shunt shaft pipe assembly 8 is arranged below the outer core cavity 702. The shunt shaft pipe assembly 8 is arranged in the smoking air cavity 101 inside the fan smoke hood 1. Steam manifold pipes 801 are arranged around the bottom of the shunt shaft pipe assembly 8, and the steam manifold pipes 801 are connected to the circulating steam pipe valves 5 by flanges;

[0037] After the electrically controlled flip gate 402 on the top of the exhaust duct 4 is opened, the purified flue gas inside the flue can be discharged. During the recycling operation, the electrically controlled flip gate 402 on the top needs to be kept closed, so as to ensure the contact time between the internal steam and the solid desulfurizer and improve the regeneration efficiency of the solid desulfurizer.

[0038] The butterfly desulfurization group pipe 7 is arranged inside the flue gas duct 3. The butterfly desulfurization group pipe 7 can divide the space inside the flue gas purification tube cavity 304 into two working areas, wherein the flue gas containing sulfide medium will enter the inner core cavity 707 inside the two sides of the butterfly desulfurization group pipe 7, and then the flue gas passes through the solid desulfurizer inside the butterfly desulfurization group pipe 7 and escapes to the outer core cavity 702 and the peripheral area of ​​the flue gas purification tube cavity 304. The flue gas continuously rolls inside the inner core cavity 707, and then passes through the pores on its surface to enter the interior and contact with the solid desulfurizer machine, chemically adsorbing the sulfur-containing compounds in the exhaust gas into the small holes of the desulfurizer, and then escapes to the outer core cavity 702 and the peripheral area of ​​the flue gas purification tube cavity 304 where the external pressure is relatively small. The flue gas in the outer core cavity 702 and the flue gas purification tube cavity 304 can also contact with the butterfly desulfurization group pipe 7 for secondary purification, thereby fully ensuring the contact area between the flue gas and the desulfurizer and the purification efficiency.

[0039] The butterfly pipe fittings 701 are provided with a through-and-through socket 703, and the butterfly pipe fittings 701 are provided with a desulfurizing agent filling 706, the butterfly pipe fittings 701 are provided with an inner core cavity 707, and the outer surface of the butterfly pipe fittings 701 is provided with a mesh structure, the branch shaft pipe assembly 8 includes a steam conduit 806 and a receiving sealing disk 802, and the receiving sealing disk 802 is welded and connected to the guide wind box 2, the steam conduit 806 is provided with a steam storage chamber 807, and the steam manifold 801 extends to the interior of the steam storage chamber 807, and both sides of the steam conduit 806 are provided with A split smoke inlet pipe 803 is provided, and the split smoke inlet pipe 803 is fixedly connected to the receiving sealing disk 802, one end of the split smoke inlet pipe 803 extends to the inside of the inner core cavity 707, and the other end of the split smoke inlet pipe 803 penetrates the receiving sealing disk 802 and extends to the inside of the smoke air cavity 101, a sealing valve seat 704 is provided on the top of the butterfly desulfurization group pipe 7, and the sealing valve seat 704 is closely connected to the butterfly desulfurization group pipe 7, and a one-way solenoid valve 705 is provided on the outer surface of the sealing valve seat 704, and the one-way solenoid valve 705 penetrates and extends to the bottom of the sealing valve seat 704;

[0040] The butterfly-shaped desulfurization pipe group 7 is made of polymer materials. After being made, irregular pore structures are distributed inside and on the surface of the butterfly-shaped pipe fitting 701. Subsequently, renewable solid desulfurizer is filled into the inside of the butterfly-shaped pipe fitting 701 from the through-connection socket 703. Then, the through-connection sockets 703 between two groups of butterfly-shaped pipe fittings 701 are joined and sealed and anchored. A group of seal seats 704 are arranged at the top of the stacked butterfly-shaped desulfurization pipe group 7, and three one-way solenoid valves 705 are arranged on the outer surface of the seal seat 704. The seal seat 704 can seal the inner core cavity 707 into a semi-closed space structure, so that the flue gas can flow out quickly from the top. When performing the steam regeneration operation, the one-way solenoid valves 705 need to be opened to facilitate the high-temperature steam to be discharged from the one-way solenoid valves 705 at the top after entering the inside of the butterfly-shaped desulfurization pipe group 7, avoiding excessive pressure in the outer core cavity 702 and the inner core cavity 707.

[0041] Please refer to Figures 6 - 7 , a piston seal cover 804 is arranged between the shunt inlet flue pipes 803, and a steam sieve pipe 805 is arranged below the piston seal cover 804. The steam sieve pipe 805 and the steam conduit 806 are arranged as an integral structure, and steam gratings 8051 are arranged on the outer surface of the steam sieve pipe 805. A guide shaft 8052 is arranged inside the steam sieve pipe 805, and the guide shaft 8052 is fixedly connected to the steam sieve pipe 805. A guide chute 8053 is arranged inside the guide shaft 8052, and the guide chute 8053 extends through both ends of the guide shaft 8052. A floating core piston 8041 is arranged at the bottom of the piston seal cover 804, and the floating core piston 8041 is fixedly connected to the piston seal cover 804. The piston seal cover 804 is fittedly connected to the guide shaft 8052 and is also fittedly connected to the steam sieve pipe 805. Metal support rods 8042 are arranged around the floating core piston 8041, and the metal support rods 8042 are rotationally connected to the piston seal cover 804 through internal threads. An abutment shaft 8043 is arranged at the bottom of the metal support rod 8042, and the abutment shaft 8043 is combined with the metal support rod 8042. The metal support rod 8042 is slidably connected to the guide shaft 8052 through the guide chute 8053;

[0042] After the steam enters the interior of the steam conduit 806, the steam pressure will push up the floating core piston 8041 and the piston cover 804 above. When the piston cover 804 is pushed out, the steam inside the steam conduit 806 will enter the steam sieve tube 805 area upward, and then enter the outer core cavity 702 through the steam grille 8051 on its surface. As long as the steam is in a conveying state, the floating core piston 8041 above will always be in a suspended state. The metal support rods 8042 around the bottom of the piston cover 804, cooperating with the abutting shaft 8043 at its bottom, can play a role in stretching and limiting the piston. After the steam washing and regeneration of the solid desulfurizer is completed, the steam supply is interrupted, and at this time, the piston cover 804 will automatically fall to complete the sealing.

[0043] An implementation method of a high-efficiency fully dry dust removal smoke hood for high-sulfur flue gas in a boiler includes the following steps:

[0044] Step 1: Use a polymer material to make the butterfly-shaped pipe fitting 701. After the butterfly-shaped pipe fitting 701 is made, irregular pore structures are distributed inside and on the surface. Then, the renewable solid desulfurizer is filled into the interior of the butterfly-shaped pipe fitting 701 from the through-connection socket 703. After that, the through-connection sockets 703 between the two groups of butterfly-shaped pipe fittings 701 are joined and sealed and anchored.

[0045] Step 2: Then, the made butterfly-shaped pipe fittings 701 are assembled into a butterfly-shaped desulfurization pipe group 7, and the laminated gaps are also sealed and anchored. Then, the butterfly-shaped desulfurization pipe group 7 is installed inside the flue gas pipe 3. One end of its bottom is connected to the branch shaft pipe assembly 8, and the top is sealed through the sealing valve seat 704.

[0046] Step 3: Finally, connect the fan smoke hood 1 to the flue gas window at the top of the boiler. The flue gas enters the smoking air cavity 101 through the window, and then enters the inner core cavity 707 of the butterfly-shaped desulfurization pipe group 7 upward through the shunt inlet flue pipe 803. The flue gas entering the inner core cavity 707 will enter the interior of the butterfly-shaped pipe fitting 701 through the pores and contact the solid desulfurizer, chemically adsorbing the sulfur-containing compounds in the waste gas into the small pores of the desulfurizer.

[0047] Step 4: The flue gas purified by adsorption will enter the interior of the outer core cavity 702 and the flue gas purification pipe cavity 304, and then enter the interior of the exhaust funnel 4 upward. Open the electric control flip gate 402 at the top of the exhaust funnel 4 to discharge the purified flue gas.

[0048] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient fully dry dust removal hood for high-sulfur flue gas of a boiler, comprising a fan hood (1), characterized in that: A guide air box (2) is arranged on the top of the fan hood (1), and the guide air box (2) is connected to the fan hood (1) by bolts; a smoke duct (3) is arranged on the top of the guide air box (2), and a smoke exhaust duct (4) is arranged on the top of the smoke duct (3); adapter flanges (301) are arranged at both ends of the smoke duct (3), and the adapter flanges (301) are connected to the smoke exhaust duct (4) and the guide air box (2) by bolts; a metal protective rod (302) is arranged between the adapter flanges (301), and the metal protective rod (302) is connected to the adapter flange (301) by a slot; circulating steam pipe valves (5) are arranged around the guide air box (2), and the circulating steam pipe valves (5) extend to the interior of the guide air box (2); and return steam pipe valves (6) are arranged around the smoke exhaust duct (4), and the return steam pipe valves (6) extend to the interior of the smoke exhaust duct (4); The outer surface of the flue gas duct (3) is provided with a heat insulation layer (303), and the inner side of the heat insulation layer (303) is provided with a flue gas purification tube cavity (304), the flue gas purification tube cavity (304) is provided with a butterfly desulfurization group pipe (7) inside, and the butterfly desulfurization group pipe (7) is connected to the flue gas duct (3) via a bracket, and the butterfly desulfurization group pipe (7) comprises a butterfly pipe fitting (701), wherein the inside and surface of the butterfly pipe fitting (701) are provided with irregular pore structures, and the inside of the butterfly pipe fitting (701) is provided with a desulfurization group pipe (7). Sulfur agent filling (706), wherein the butterfly pipe fittings (701) are surrounded to form an outer core cavity (702), the butterfly pipe fittings (701) themselves surround to form an inner core cavity (707), and a branch shaft pipe assembly (8) is arranged below the outer core cavity (702), and the branch shaft pipe assembly (8) is arranged in the smoke intake air cavity (101) inside the fan hood (1), and steam manifolds (801) are arranged around the bottom of the branch shaft pipe assembly (8), and the steam manifold (801) is connected to the circulating steam pipe valve (5) through a flange.

2. The efficient fully dry dust removal hood for high-sulfur flue gas of a boiler according to claim 1, characterized in that: A buffer discharge cabin (401) is arranged inside the smoke exhaust duct (4), and a smoke exhaust top window (403) is arranged at the bottom of the buffer discharge cabin (401); an electrically controlled flip gate (402) is arranged at the top of the smoke exhaust duct (4), and the electrically controlled flip gate (402) is rotatably connected to the smoke exhaust duct (4); and the buffer discharge cabin (401) is connected to the smoke purification lumen (304) via the smoke exhaust top window (403).

3. The efficient fully dry dust removal hood for high-sulfur flue gas of a boiler according to claim 2, characterized in that: A plug-in socket (703) is provided between the butterfly pipe fittings (701), and a mesh structure is provided on the outer surface of the butterfly pipe fittings (701). The branching shaft pipe assembly (8) comprises a steam conduit (806) and a receiving sealing disk (802), and the receiving sealing disk (802) is welded to the guide air box (2). A steam storage chamber (807) is provided inside the steam conduit (806), and the steam manifold (801) extends to the inside of the steam storage chamber (807).

4. The efficient fully dry dust removal hood for high-sulfur flue gas of a boiler according to claim 3, characterized in that: A diversion smoke inlet pipe (803) is provided on both sides of the steam duct (806), and the diversion smoke inlet pipe (803) is fixedly connected to the receiving sealing plate (802), one end of the diversion smoke inlet pipe (803) extends to the interior of the inner core cavity (707), and the other end of the diversion smoke inlet pipe (803) passes through the receiving sealing plate (802) and extends to the interior of the smoking air cavity (101).

5. The efficient fully dry dust removal hood for high-sulfur flue gas of a boiler according to claim 4, characterized in that: A sealing valve seat (704) is provided on the top of the butterfly-shaped desulfurization pipe group (7), and the sealing valve seat (704) is closely connected to the butterfly-shaped desulfurization pipe group (7). A one-way solenoid valve (705) is provided on the outer surface of the sealing valve seat (704), and the one-way solenoid valve (705) extends through and below the sealing valve seat (704).

6. The efficient fully dry dust removal hood for high-sulfur flue gas of a boiler according to claim 5, characterized in that: A piston cover (804) is provided between the split smoke inlet pipes (803), and a steam screen tube (805) is provided below the piston cover (804); the steam screen tube (805) and the steam conduit (806) are provided as an integrated structure, and a steam grille (8051) is provided on the outer surface of the steam screen tube (805); a guide shaft (8052) is provided on the inner side of the steam screen tube (805), and the guide shaft (8052) is fixedly connected to the steam screen tube (805).

7. The efficient fully dry dust removal hood for high-sulfur flue gas of a boiler according to claim 6, characterized in that: A guide groove (8053) is provided inside the guide shaft (8052), and the guide groove (8053) extends through both ends of the guide shaft (8052). A floating core piston (8041) is provided at the bottom of the piston cover (804), and the floating core piston (8041) is fixedly connected to the piston cover (804). The piston cover (804) is fitted and connected to the guide shaft (8052), and the piston cover (804) is fitted and connected to the steam screen pipe (805).

8. The efficient fully dry dust removal hood for high-sulfur flue gas of a boiler according to claim 7, characterized in that: The floating core piston (8041) is provided with metal support rods (8042) around its periphery, and the metal support rods (8042) are rotationally connected to the piston cover (804) via internal threads, a countershaft (8043) is provided at the bottom of the metal support rod (8042), and the countershaft (8043) is combinedly connected to the metal support rod (8042), and the metal support rod (8042) is slidably connected to the guide shaft (8052) via a guide slot (8053).

9. An implementation method of an efficient fully dry dust removal hood for high-sulfur flue gas of a boiler, characterized in that, The high-efficiency, fully dry dust removal hood for high-sulfur flue gas from a boiler according to claim 8 is implemented, wherein the following steps are included: Step 1: A butterfly-shaped pipe (701) is made of polymer material, and then a renewable solid desulfurizer is filled into the interior of the butterfly-shaped pipe (701) from the insertion and insertion opening (703), and then the insertion and insertion openings (703) between two sets of butterfly-shaped pipes (701) are attached and sealed and anchored; Step 2: assemble the manufactured butterfly pipe fittings (701) into a butterfly desulfurization pipe assembly (7), and perform sealing and anchoring at the gaps of the laminated layers. Then, install the butterfly desulfurization pipe assembly (7) inside the flue gas duct (3), connect one end of the bottom thereof to the branch shaft pipe assembly (8), and seal the top thereof via a sealing valve seat (704); Step 3: Finally, connect the blower smoke hood (1) to the flue gas window at the top of the boiler. The flue gas enters the smoke suction cavity (101) through the window, and then enters the inner core cavity (707) of the butterfly desulfurization pipe group (7) upward through the shunt smoke inlet pipe (803). The flue gas entering the inner core cavity (707) will enter the interior of the butterfly pipe fitting (701) through the pores and contact the solid desulfurizer, chemically adsorbing the sulfur-containing compounds in the waste gas into the small pores of the desulfurizer; Step 4: The flue gas purified by adsorption will enter the interior of the outer core cavity (702) and the flue gas purification pipe cavity (304), and then enter the interior of the smoke exhaust hopper (4) upward. Open the electric control flip gate (402) at the top of the smoke exhaust hopper (4) to discharge the purified flue gas.

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