A fluidized bed reactor for removing impurities and desulfurizing chemical industrial tail gas

Abstract

The present invention discloses a fluidized bed reactor for removing impurities and desulfurizing chemical tail gas. An exhaust gas inlet pipe is connected and installed at the bottom air inlet end of the reaction tank. A first guide ring is provided at the bottom of the inner side wall of the reaction tank. The outer peripheral side wall of the first guide ring is hermetically and movably connected to the inner side wall of the reaction tank. The bottom outer periphery of the first guide ring is rotationally connected to a support gas guide ring. The outer peripheral side wall of the support gas guide ring is hermetically and fixedly connected to the inner side wall of the reaction tank. A transmission steam turbine is provided in the middle of the inner side of the reaction tank. The top of the transmission steam turbine is fixedly connected to the inner side edge of the first guide ring. A second guide ring is provided above the first guide ring. The second guide ring is hermetically and fixedly connected to the inner side wall of the reaction tank. A powder inlet pipe is connected through the bottom of the side wall of the reaction tank. The connection between the powder inlet pipe and the reaction tank is located between the first guide ring and the second guide ring. A plurality of stirring needles are fixedly connected to the upper surface of the first guide ring, which improves the mixing uniformity and reaction speed, promotes the reaction effect of desulfurization, and ensures the desulfurization quality.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas desulfurization, and specifically to a fluidized bed reactor for removing impurities and desulfurizing chemical tail gas. Background Technique

[0002] In chemical production, tail gas often contains various compound gases that pollute the environment, such as sulfide gases. Therefore, desulfurization treatment is often required before emission. In desulfurization technology, fluidized bed desulfurization is a common desulfurization device.

[0003] The application document with the publication number CN117679945A discloses a circulating fluidized bed flue gas desulfurization device, including a desulfurization tower and an air inlet pipe installed at the lower end of the desulfurization tower. A connecting pipe is provided on the right side of the desulfurization tower. A bag type dust removal device is provided on the right side of the connecting pipe. A smoke exhaust tower is provided on the right side of the bag type dust removal device. The lower end of the desulfurization tower is fixedly connected with a Venturi tube. An atomizing nozzle is provided at the upper end of the desulfurization tower. The lower end of the bag type dust removal device is fixedly connected with a reflux device. A lime tank is provided on the left side of the reflux device.

[0004] The above device has the following deficiencies. When the above device is in use, there are a large number of transmission components, and the used transmission components hinder the flow of desulfurizer powder. The powder is easily attached to the transmission blades, interfering with the transmission and desulfurization effect. Moreover, the transmission device of the above device is prone to having reaction products attached to the surface of each transmission device due to the high-temperature reaction conditions, interfering with the transmission, having poor transmission efficiency, high energy loss. At the same time, the powder air flow pressure stabilizing mechanism of the above device is arranged in the reaction container and is easily affected by the high temperature and high pressure during the reaction process, resulting in a reduction in the pressure stabilizing effect. At the same time, the pressure stabilizing mechanism interferes with the powder transportation, easily retaining a large amount of powder, not only polluting the pressure stabilizing mechanism, but also increasing the powder usage amount and reducing the overall working efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a fluidized bed reactor for removing impurities and desulfurizing chemical tail gas to improve the overall working efficiency in view of the above existing problems and deficiencies.

[0006] The present invention solves at least one of the following technical problems:

[0007] (1) When the above device is in use, there are a large number of transmission components, and the used transmission components hinder the flow of desulfurizer powder. The powder is easily attached to the transmission blades, interfering with the transmission and desulfurization effect;

[0008] (2) The transmission device of the above device is prone to having reaction products attached to the surface of each transmission device due to the high-temperature reaction conditions, interfering with the transmission, having poor transmission efficiency, high energy loss;

[0009] (3) The pressure stabilizing mechanism for the powder air flow of the above device is arranged inside the reaction vessel, and is easily affected by the high temperature and high pressure during the reaction process, resulting in a reduction in the pressure stabilizing effect. At the same time, the pressure stabilizing mechanism interferes with the powder transportation, and a large amount of powder is likely to be retained, which not only pollutes the pressure stabilizing mechanism, but also increases the powder usage and reduces the overall working efficiency.

[0010] The object of the present invention can be achieved by the following technical solutions: A fluidized bed reactor for removing impurities and desulfurizing chemical industrial waste gas, including a reaction tank. The bottom air inlet end of the reaction tank is connected and installed with an exhaust gas inlet pipe. At the bottom of the inner side wall of the reaction tank, there is a first diversion ring. The outer peripheral side wall of the first diversion ring is hermetically and movably connected to the inner side wall of the reaction tank. The bottom outer periphery of the first diversion ring is rotationally connected to a support gas guide ring. The outer peripheral side wall of the support gas guide ring is hermetically and fixedly connected to the inner side wall of the reaction tank. In the middle of the inner side of the reaction tank, there is a transmission steam turbine. The top of the transmission steam turbine is fixedly connected to the inner side edge of the first diversion ring. Above the first diversion ring, there is a second diversion ring. The second diversion ring is hermetically and fixedly connected to the inner side wall of the reaction tank. At the bottom of the side wall of the reaction tank, there is a powder inlet pipe connected through. The connection part of the powder inlet pipe and the reaction tank is located between the first diversion ring and the second diversion ring. The upper surface of the first diversion ring is fixedly connected with a plurality of stirring needles.

[0011] As a further scheme of the invention, the top air outlet end of the reaction tank is connected and installed with a cyclone dust collector, and the air outlet end of the cyclone dust collector is installed with a bag filter.

[0012] As a further scheme of the invention, the inner side edge of the first diversion ring is in an arc-shaped warped shape. The middle of the inner peripheral side wall of the support gas guide ring is in an outwardly protruding groove structure. The cross-section of the side wall groove of the support gas guide ring is arc-shaped and the curved surface where the groove is located is tangent to the lower surface of the first diversion ring and the bottom inner side wall of the reaction tank respectively.

[0013] As a further scheme of the invention, the height of the inner side edge of the second diversion ring is lower than that of the outer side edge. The middle of the second diversion ring is in two bends. The inner side wall of the second diversion ring is arc-shaped, and the arc of the inner side wall of the second diversion ring is coaxial with the warped arc of the inner side edge of the first diversion ring.

[0014] As a further scheme of the invention, above the second diversion ring, there is a third diversion ring. The lower surface of the third diversion ring is hermetically abutted against the second diversion ring. The outer periphery of the third diversion ring is fixedly connected to the inner side wall of the reaction tank. The height of the upper edge of the outer periphery of the third diversion ring is higher than that of the upper edge of the inner periphery. The upper surface of the third diversion ring is in an arc-shaped concave inclined surface structure.

[0015] As a further scheme of the invention, a plurality of oil gun heads are installed in the middle of the inner peripheral side wall of the third diversion ring. The oil gun heads are evenly distributed in an annular array. The oil gun heads are connected to a fuel conduit, and the fuel conduit is connected to a fuel delivery pipe. The fuel conduit is buried inside the third diversion ring.

[0016] As a further aspect of the invention, an input end of the powder inlet pipe is communicated with a powder inlet fan. A powder tank is arranged above the powder inlet pipe. The powder tank is communicated with a side wall of an output end of the powder inlet pipe through a feeding auger. A voltage stabilizer is installed on a lower side of a middle part of the powder inlet pipe. A fourth flow guide ring is arranged between a middle part inside the powder inlet pipe and a connection position between the voltage stabilizer and the feeding auger. An outer periphery of the fourth flow guide ring is fixedly and sealingly connected with an inner side wall of the powder inlet pipe.

[0017] As a further aspect of the invention, the voltage stabilizer includes a voltage stabilizing cylinder which is communicated with the powder inlet pipe. A voltage stabilizing spring is installed inside the voltage stabilizing cylinder. A lower end of the voltage stabilizing spring is fixedly connected with the voltage stabilizing cylinder. An upper end of the voltage stabilizing spring is fixedly connected with a voltage stabilizing piston which is in sealing sliding connection with an inner side wall of the voltage stabilizing cylinder.

[0018] Advantages of the present invention:

[0019] (1) Driven by a transmission steam turbine, the high-speed flow of chemical tail gas is used as a driving force to drive the rotation of a first flow guide ring that restricts the flow of chemical tail gas. The transmission steam turbine is directly connected to the first flow guide ring, and the transmission steam turbine is supported by the first flow guide ring through the first flow guide ring, reducing the transmission components, simplifying the transmission process, reducing the energy loss during the transmission process, and at the same time preventing the transmission steam turbine from adhering to desulfurizer powder and reaction products of desulfurizer and chemical tail gas, reducing the maintenance requirements and maintenance steps of the transmission steam turbine. At the same time, through the setting of the first flow guide ring, the Venturi tube structure is integrated, promoting the more sufficient mixing of desulfurizer powder and chemical tail gas. Through the rotation of the first flow guide ring and the rotation of the stirring needles, the desulfurizer powder gas flow affected by the Venturi effect forms a circular structure evenly between the first flow guide ring and the second flow guide ring, so as to be more evenly mixed in the chemical tail gas. By rotating the stirring needles and guiding the rotation of the desulfurizer powder, the obstruction of the powder flow by the stirring needles is avoided, and the edges of the first flow guide ring and the second flow guide ring are both arc-shaped transitions, reducing the powder adhesion amount, increasing the reaction amount of the powder participating in desulfurization, promoting the desulfurization effect, and reducing the maintenance difficulty of the equipment;

[0020] (2) During operation, through the warped inner edge of the first deflector ring, the grooved arc surface of the support air guide ring, the two bends in the middle of the second deflector ring, and the arc-shaped concave inclined surface structure of the third deflector ring, the kinetic energy loss of the airflow during deflection is reduced, and the separation degree of the airflow and the turbulence and turbulence during turning are reduced. The pressure difference between the low-pressure area above the first deflector ring and the airflow is increased, the circumferential uniformity of the desulfurizer powder airflow is promoted, and the mixed airflow formed by the desulfurizer powder airflow and the chemical tail gas airflow forms a convective state on the outer periphery of the airflow, improving the mixing effect of the desulfurizer powder airflow and the tail gas, promoting the reaction effect of desulfurization, and through the stable injection combustion heating of the oil gun head, which fits the flow trajectory of the airflow in the reaction tank, enabling the fuel to be fully and evenly mixed into the mixed airflow, while continuously undergoing the combustion reaction itself, so that the mixed airflow is quickly and evenly heated to the reaction temperature required for desulfurization, while reducing the heat loss during the heat conduction process, thereby reducing the energy loss during the transmission, conduction, and mixing processes, improving the mixing uniformity and reaction speed, promoting the reaction effect of desulfurization, and ensuring the desulfurization quality;

[0021] (3) During operation, by forming an annular low-pressure area on one side of the fourth deflector ring close to the connection of the feeding auger, the desulfurizer powder is quickly mixed into the accelerated high-speed airflow and input into the annular area between the first deflector ring and the second deflector ring, effectively reducing the adhesion amount of the desulfurizer powder on the powder inlet pipe. At the same time, the pressure stabilizing piston bears the pressure equivalent to the airflow pressure, and then generates a pressure to push the pressure stabilizing piston to compress the pressure stabilizing spring. Through the flexible expansion and contraction of the pressure stabilizing spring with the change of pressure, the suddenly increased or decreased pressure is quickly stabilized within the set range, actively and flexibly adjusted to keep the air pressure stable, and the pressure stabilizing device does not need to contact the powder or the tail gas, only requiring simple maintenance, improving the overall service life and continuous working duration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 It is the front view of the overall structure of the present invention;

[0024] Figure 2 It is the front view of the internal structure of the reaction tank of the present invention;

[0025] Figure 3 It is Figure 2 the enlarged schematic view of area A in

[0026] Figure 4 It is the front view of the internal structure of the powder inlet pipe and the pressure stabilizer of the present invention;

[0027] Figure 5 It is the top view of the overall structure of the first deflector ring of the present invention;

[0028] In the figure: 101, reaction tank; 102, waste gas inlet pipe; 103, powder inlet pipe; 104, powder tank; 105, feeding auger; 106, powder inlet fan; 107, voltage stabilizer; 108, cyclone dust collector; 109, bag filter; 201, first guide ring; 202, support gas guide ring; 203, driving steam turbine; 204, second guide ring; 205, third guide ring; 301, voltage stabilizing cylinder; 302, voltage stabilizing spring; 303, voltage stabilizing piston; 304, fourth guide ring; 401, stirring needle; 501, oil gun head; 502, fuel conduit; 503, fuel delivery pipe. Specific embodiments

[0029] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, describe in detail the specific embodiments, structures, features and their effects of the present invention as follows.

[0030] Please refer to Figures 1-5 As shown: A fluidized bed reactor for removing impurities and desulfurizing chemical tail gas, including a reaction tank 101. The top air outlet end of the reaction tank 101 is connected and installed with a cyclone dust collector 108. The air outlet end of the cyclone dust collector 108 is installed with a bag filter 109. The bottom air inlet end of the reaction tank 101 is connected and installed with a waste gas inlet pipe 102. The bottom inner side wall of the reaction tank 101 is provided with a first guide ring 201. The outer peripheral side wall of the first guide ring 201 is hermetically and movably connected to the inner side wall of the reaction tank 101. The bottom outer periphery of the first guide ring 201 is rotationally connected to a support gas guide ring 202. The outer peripheral side wall of the support gas guide ring 202 is hermetically and fixedly connected to the inner side wall of the reaction tank 101. The middle part of the inner side of the reaction tank 101 is provided with a driving steam turbine 203. The top of the driving steam turbine 203 is fixedly connected to the inner side edge of the first guide ring 201. A second guide ring 204 is provided above the first guide ring 201. The second guide ring 204 is hermetically and fixedly connected to the inner side wall of the reaction tank 101. The bottom side wall of the reaction tank 101 is connected through a powder inlet pipe 103. The connection part of the powder inlet pipe 103 and the reaction tank 101 is located between the first guide ring 201 and the second guide ring 204. The upper surface of the first guide ring 201 is fixedly connected with a plurality of stirring needles 401;

[0031] During the operation of this embodiment, the reaction tank 101 serves as a reaction vessel for desulfurizing chemical industrial waste gas. The chemical industrial waste gas is introduced into the reaction tank 101 through the waste gas inlet pipe 102, and the desulfurizer powder is introduced into the reaction tank 101 in the form of air blowing through the powder inlet pipe 103. Thus, the chemical industrial waste gas and the desulfurizer powder are fully mixed in the reaction tank 101 and react, and the sulfide in the chemical industrial waste gas is reacted and solidified into powder, thereby achieving desulfurization. Subsequently, the powder after the reaction enters the cyclone dust collector 108 along with the air flow, and the first filtration and dust removal are carried out through the cyclone dust collector 108. Then, the air flow after the first filtration is introduced into the bag filter 109, and the second filtration and dust removal are carried out through the bag filter 109, thereby completely achieving the removal of sulfide and dust filtration of the chemical industrial waste gas. During the diversion, when the chemical industrial waste gas flows through the first diversion ring 201, the first diversion ring 201 suddenly restricts the cross-sectional area of the chemical industrial waste gas flow, thereby forming an annular low-pressure area above the outer periphery of the first diversion ring 201, and accelerating the flow velocity of the air flow passing through the middle of the first diversion ring 201, so that the air flow containing the desulfurizer powder input by the powder inlet pipe 103 is fully mixed with the chemical industrial waste gas. When the waste gas flow passes through the bottom of the reaction tank 101, the driving transmission turbine 203 is rotated, driving the first diversion ring 201 to rotate, and then driving each stirring needle 401 to rotate, surrounding the desulfurizer powder air flow in a circle with the rotation of the first diversion ring 201, and uniformly flowing into the chemical industrial waste gas in a surrounding manner through the low-pressure area generated by the restriction of the first diversion ring 201.

[0032] The inner side edge of the first diversion ring 201 is in an arc-shaped warped shape, the middle part of the inner peripheral side wall of the supporting air guide ring 202 is in an outwardly convex groove structure, the cross-section of the side wall groove of the supporting air guide ring 202 is arc-shaped, and the curved surfaces where the grooves are located are tangent to the lower surface of the first diversion ring 201 and the inner side wall of the bottom of the reaction tank 101 respectively;

[0033] By means of the warped inner side edge of the first diversion ring 201 and the groove arc surface of the supporting air guide ring 202, the kinetic energy loss of the air flow when being limited by the first diversion ring 201 and at the turning angle is reduced, and the separation degree of the air flow and the turbulence and turbulence at the turning angle are reduced, further increasing the pressure difference between the low-pressure area above the first diversion ring 201 and the air flow, and improving the mixing effect of the desulfurizer powder air flow and the waste gas flow.

[0034] The height of the inner side edge of the second diversion ring 204 is lower than the height of the outer side edge. The middle part of the second diversion ring 204 is bent in two sections. The inner side wall of the second diversion ring 204 is arc-shaped, and the arc of the inner side wall of the second diversion ring 204 is coaxial with the warped arc of the inner side edge of the first diversion ring 201;

[0035] The desulfurizer powder air flow is diverted by the second diversion ring 204, so that the residence time of the desulfurizer powder air flow between the second diversion ring 204 and the first diversion ring 201 is extended. Thus, with the rotation of each stirring needle 401, the desulfurizer powder air flow is circulated around in the reaction tank 101, and then evenly enters the chemical tail gas air flow in a ring shape under the action of the air pressure deflection force.

[0036] A third diversion ring 205 is provided above the second diversion ring 204. The lower surface of the third diversion ring 205 is in sealed contact with the second diversion ring 204. The outer periphery of the third diversion ring 205 is fixedly connected to the inner side wall of the reaction tank 101. The height of the upper edge of the outer periphery of the third diversion ring 205 is higher than the height of the upper edge of the inner periphery. The upper surface of the third diversion ring 205 has an arc concave inclined surface structure.

[0037] The air flow at the inner bottom of the reaction tank 101 is diverted through the upper surface of the arc concave inclined surface structure of the third diversion ring 205, further reducing the kinetic energy loss of the air flow in the low-pressure area when flowing from the side wall of the reaction tank 101 to the center, as well as the turbulence and eddy current on the air flow contact surface, promoting the formation of a convection state in the outer periphery of the mixed air flow formed by the desulfurizer powder air flow and the chemical tail gas air flow, increasing the convection flow rate formed in the reaction tank 101, and making the combination and reaction of the desulfurizer powder and the waste gas more sufficient.

[0038] A plurality of oil gun heads 501 are installed in the middle of the inner peripheral side wall of the third diversion ring 205. The oil gun heads 501 are evenly distributed in a circular array. The oil gun heads 501 are connected to a fuel conduit 502. The fuel conduit 502 is connected to a fuel delivery pipe 503. The fuel conduit 502 is buried inside the third diversion ring 205.

[0039] Fuel is sprayed through the oil gun heads 501 into the mixed air flow formed by the desulfurizer powder air flow and the chemical tail gas air flow and continuously ignited. The mixed air flow is heated by the injection combustion of the fuel. At the same time, the spraying direction of the fuel fits the flow trajectory of the air flow in the reaction tank 101, so that the fuel is fully and evenly mixed into the mixed air flow, and at the same time, its own continuous combustion reaction occurs, so that the mixed air flow is quickly and evenly heated to the reaction temperature required for desulfurization, while reducing the heat loss during the heat conduction process.

[0040] The input end of the powder inlet pipe 103 is connected to a powder inlet fan 106. A powder tank 104 is provided above the powder inlet pipe 103. The powder tank 104 is connected to the side wall of the output end of the powder inlet pipe 103 through a feeding auger 105. A voltage stabilizer 107 is installed on the lower side of the middle of the powder inlet pipe 103. A fourth diversion ring 304 is provided between the voltage stabilizer 107 and the connection of the feeding auger 105 in the middle inner side of the powder inlet pipe 103. The outer periphery of the fourth diversion ring 304 is fixedly connected to the inner side wall of the powder inlet pipe 103 in a sealed manner.

[0041] The desulfurizer powder is contained in the powder tank 104, the feeding auger 105 is used to ensure the stable conveyance of the powder, the powder feeding fan 106 is used to convey air flow to blow the desulfurizer powder to form a desulfurizer powder air flow, the fourth guide ring 304 is used to limit the flow and increase the pressure of the air flow of the powder feeding fan 106, and an annular low-pressure area is formed on one side of the fourth guide ring 304 close to the connection with the feeding auger 105, so that the desulfurizer powder is quickly mixed in the accelerated high-speed air flow and input into the annular area between the first guide ring 201 and the second guide ring 204, effectively reducing the adhesion amount of the desulfurizer powder on the powder feeding pipe 103. The voltage stabilizer 107 is used to stabilize the air pressure of the air flow input by the powder feeding fan 106 into the powder feeding pipe 103, so that the air pressure is maintained within a stable value range and the stable input of the air flow is maintained.

[0042] The voltage stabilizer 107 includes a voltage stabilizing cylinder 301. The voltage stabilizing cylinder 301 is communicated with the powder feeding pipe 103. A voltage stabilizing spring 302 is installed in the voltage stabilizing cylinder 301. The lower end of the voltage stabilizing spring 302 is fixedly connected to the voltage stabilizing cylinder 301. The upper end of the voltage stabilizing spring 302 is fixedly connected to a voltage stabilizing piston 303. The voltage stabilizing piston 303 is in sealed sliding connection with the inner side wall of the voltage stabilizing cylinder 301.

[0043] When the powder feeding pipe 103 conveys air flow, it is kept in communication with the voltage stabilizing cylinder 301, so that the voltage stabilizing piston 303 bears a pressure equal to the air pressure, and then generates a pressure to push the voltage stabilizing piston 303 to compress the voltage stabilizing spring 302, so that the voltage stabilizing spring 302 compresses to generate an elastic force until the elastic force is balanced with the pressure of the air pressure. When the air pressure of the powder feeding pipe 103 changes, the resultant force received by the voltage stabilizing piston 303 changes, and the voltage stabilizing spring 302 immediately undergoes an extension or contraction movement, so as to quickly stabilize the suddenly increased or decreased pressure within the set range, actively and flexibly adjust to keep the air pressure stable, and there is no risk of powder adhesion.

[0044] When the present invention is in use, the staff transmits the power through the transmission steam turbine 203, so that the high-speed flow of the chemical tail gas is used as a driving force to drive the first guide ring 201 for limiting the flow of the chemical tail gas to rotate. The transmission steam turbine 203 is directly connected to the first guide ring 201, and the transmission steam turbine 203 is supported by the first guide ring 201, which reduces the transmission components, simplifies the transmission process, and reduces the energy loss of the transmission process. At the same time, it is prevented that the transmission steam turbine 203 is attached to the desulfurizer powder and the reaction products of the desulfurizer and the chemical tail gas, and the maintenance requirements and maintenance steps of the transmission steam turbine 203 are reduced. At the same time, the Venturi tube structure is integrated through the setting of the first guide ring 201. The desulfurizer powder is promoted to be mixed more fully with the chemical tail gas, and the desulfurizer powder airflow affected by the Venturi effect is uniformly formed in an annular structure between the first guide ring 201 and the second guide ring 204 through the rotation of the first guide ring 201 and the rotation of the stirring needle 401, so as to be more uniformly mixed in the chemical tail gas. By rotating the stirring needle 401 and guiding the rotation of the desulfurizer powder, the stirring needle 401 is prevented from hindering the flow of powder, and the edges of the first guide ring 201 and the second guide ring 204 are both arc transitions, which reduces the amount of powder adhesion, increases the amount of powder participating in the desulfurization reaction, promotes the desulfurization effect, and reduces the difficulty of equipment maintenance;

[0045] During operation, the kinetic energy loss of the airflow during the flow guidance is reduced through the warped inner side of the first guide ring 201, the groove arc surface of the support air guide ring 202, the two bends in the middle of the second guide ring 204, and the arc concave inclined surface structure of the third guide ring 205, and the separation degree of the airflow and the turbulence and turbulence during the corner are reduced, the pressure difference between the low-pressure area above the first guide ring 201 and the airflow is increased, the surrounding uniformity of the desulfurizer powder airflow is promoted, and the mixed airflow formed by the desulfurizer powder airflow and the chemical tail gas airflow forms a convection state at the periphery of the airflow, thereby improving the desulfurizer powder. The mixing effect of the final airflow and the tail gas promotes the desulfurization reaction effect, and the stable injection combustion heating of the oil gun head 501 matches the flow trajectory of the airflow in the reaction tank 101, so that the fuel is fully and evenly mixed into the mixed airflow, and the combustion reaction is continuously carried out by itself, so that the mixed airflow is quickly and evenly heated to the reaction temperature required for desulfurization, and the heat loss in the heat conduction process is reduced, thereby reducing the energy loss in the transmission, conduction and mixing processes, improving the mixing uniformity and reaction speed, promoting the desulfurization reaction effect, and ensuring the desulfurization quality;

[0046] During operation, an annular low-pressure area is formed on one side of the fourth flow guide ring 304 near the connection with the feeding auger 105, enabling the desulfurization agent powder to be rapidly mixed into the accelerated high-speed air flow and input into the annular area between the first flow guide ring 201 and the second flow guide ring 204. This effectively reduces the amount of desulfurization agent powder adhering to the powder inlet pipe 103. At the same time, the pressure stabilizing piston 303 bears a pressure equal to the air pressure, thereby generating a pressure that pushes the pressure stabilizing piston 303 to compress the pressure stabilizing spring 302. Through the flexible expansion and contraction of the pressure stabilizing spring 302 with the change in pressure, the suddenly increased or decreased pressure is quickly stabilized within the set range, actively and flexibly adjusting to keep the air pressure stable. Moreover, the pressure stabilizing device does not need to contact the powder or the exhaust gas, only requiring simple maintenance, which improves the overall service life and continuous working duration.

[0047] The above are only the preferred embodiments of the present invention, and there is no any form of limitation to the present invention. Although the present invention has been disclosed as above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A fluidized bed reactor for removing impurities and desulfurizing chemical industrial tail gas, characterized in that, It includes a reaction tank (101). An exhaust gas inlet pipe (102) is connected and installed at the bottom air inlet end of the reaction tank (101). A first guide ring (201) is provided at the bottom of the inner side wall of the reaction tank (101). The outer peripheral side wall of the first guide ring (201) is hermetically and movably connected to the inner side wall of the reaction tank (101). The bottom outer periphery of the first guide ring (201) is rotatably connected to a support air guide ring (202). The outer peripheral side wall of the support air guide ring (202) is hermetically and fixedly connected to the inner side wall of the reaction tank (101). A transmission steam turbine (203) is provided in the middle of the inner side of the reaction tank (101). The top of the transmission steam turbine (203) is fixedly connected to the inner side edge of the first guide ring (201). A second guide ring (204) is provided above the first guide ring (201). The second guide ring (204) is hermetically and fixedly connected to the inner side wall of the reaction tank (101). A powder inlet pipe (103) is connected through the bottom side wall of the reaction tank (101). The connection part of the powder inlet pipe (103) and the reaction tank (101) is located between the first guide ring (201) and the second guide ring (204). A plurality of stirring needles (401) are fixedly connected to the upper surface of the first guide ring (201). The inner side edge of the first guide ring (201) is in an arc-shaped warped shape. The middle of the inner peripheral side wall of the support air guide ring (202) is in an outwardly convex groove structure. The cross-section of the side wall groove of the support air guide ring (202) is arc-shaped and the curved surface where the groove is located is tangent to the lower surface of the first guide ring (201) and the bottom inner side wall of the reaction tank (101) respectively. The height of the inner side edge of the second guide ring (204) is lower than that of the outer side edge. The middle of the second guide ring (204) is bent in two sections. The inner side wall of the second guide ring (204) is arc-shaped, and the inner wall arc of the second guide ring (204) is coaxial with the warped arc of the inner side edge of the first guide ring (201). A third guide ring (205) is provided above the second guide ring (204). The lower surface of the third guide ring (205) is in sealed contact with the second guide ring (204). The outer periphery of the third guide ring (205) is fixedly connected to the inner side wall of the reaction tank (101). The height of the upper edge of the outer periphery of the third guide ring (205) is higher than that of the upper edge of the inner periphery. The upper surface of the third guide ring (205) is in an arc-shaped concave inclined surface structure. A plurality of oil gun heads (501) are installed in the middle of the inner peripheral side wall of the third guide ring (205). The oil gun heads (501) are evenly distributed in an annular array. The oil gun heads (501) are connected to a fuel conduit (502). The fuel conduit (502) is connected to a fuel delivery pipe (503). The fuel conduit (502) is buried inside the third guide ring (205).

2. The fluidized bed reactor for removing impurities and desulfurizing chemical tail gas according to claim 1, characterized in that The top air outlet end of the reaction tank (101) is connected and installed with a cyclone dust collector (108). The air outlet end of the cyclone dust collector (108) is installed with a bag filter (109).

3. A fluidized bed reactor for removing impurities and desulfurizing chemical industrial tail gas according to claim 1, characterized in that, The input end of the powder inlet pipe (103) is connected to a powder inlet fan (106). A powder tank (104) is provided above the powder inlet pipe (103). The powder tank (104) is connected to the side wall of the output end of the powder inlet pipe (103) through a feeding auger (105). A voltage stabilizer (107) is installed on the lower side of the middle part of the powder inlet pipe (103). A fourth flow guide ring (304) is provided between the middle part of the powder inlet pipe (103) and the connection between the voltage stabilizer (107) and the feeding auger (105). The outer periphery of the fourth flow guide ring (304) is fixedly and sealingly connected to the inner side wall of the powder inlet pipe (103).

4. A fluidized bed reactor for removing impurities and desulfurizing chemical tail gas according to claim 3, characterized in that, The voltage stabilizer (107) includes a voltage stabilizing cylinder (301). The voltage stabilizing cylinder (301) is connected to the powder inlet pipe (103). A voltage stabilizing spring (302) is installed in the voltage stabilizing cylinder (301). The lower end of the voltage stabilizing spring (302) is fixedly connected to the voltage stabilizing cylinder (301). The upper end of the voltage stabilizing spring (302) is fixedly connected to a voltage stabilizing piston (303). The voltage stabilizing piston (303) is sealingly and slidably connected to the inner side wall of the voltage stabilizing cylinder (301).

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