Boiler flue gas desulfurization reactor and treatment method thereof

Abstract

The invention provides a boiler flue gas desulfurization reactor and a treatment method thereof. The boiler flue gas desulfurization reactor comprises an inlet contraction section, a rectification acceleration section and a reaction section which are sequentially arranged from bottom to top, wherein a desulfurizing agent release assembly is arranged in the inlet contraction section, and the desulfurizing agent release assembly is used for releasing a desulfurizing agent; a rectification long-diameter pipeline is arranged in the rectification acceleration section, and a turbulent flow assembly is arranged in the reaction section; moreover, to-be-treated flue gas entering from the lower part of the inlet contraction section is mixed with the desulfurizing agent, the flue gas mixed with the desulfurizing agent is accelerated by the rectifying long-diameter pipeline and then reaches the reaction section, and the flue gas mixed with the desulfurizing agent is subjected to turbulent flow by the turbulent flow assembly, then fully reacts with the desulfurizing agent and flows out from the upper part of the reaction section. The problems that an existing high-temperature flue gas desulfurization device is poor in desulfurization effect and low in desulfurization efficiency can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler flue gas treatment, and more particularly to a boiler flue gas desulfurization reactor and a treatment method thereof. BACKGROUND

[0002] With the development of society, people have put forward higher requirements for environmental protection, especially for the governance of air pollution. Each region has strict requirements for the emission of pollutant gases, and the pollutant gases need to be treated first. Only the gases meeting the standards can be discharged into the air.

[0003] For a boiler device, it needs to generate the required energy by burning fuel (such as coal), and high-temperature flue gas is generated after the fuel is burned. For these high-temperature flue gas, it cannot be directly discharged into the air and needs to be treated in a series of processes to meet the emission standards.

[0004] Specifically, for the high-temperature flue gas generated by the boiler device, the first treatment process is desulfurization treatment, which removes the sulfur-containing substances in the high-temperature flue gas and has a preliminary purifying effect on the high-temperature flue gas.

[0005] However, the existing high-temperature flue gas desulfurization device has the problems of low desulfurization efficiency caused by unstable flow field and poor desulfurization effect caused by uneven mixing of high-temperature flue gas and desulfurizing agent.

[0006] Based on the above technical problems, there is an urgent need for a high-temperature flue gas desulfurization scheme with strong desulfurization effect and high desulfurization efficiency. SUMMARY

[0007] In view of the above problems, the purpose of the present application is to provide a boiler flue gas desulfurization reactor and a treatment method thereof to solve the problems of poor desulfurization effect and low desulfurization efficiency of the existing high-temperature flue gas desulfurization device.

[0008] The boiler flue gas desulfurization reactor provided by the present application comprises an inlet contraction section, a flow rectification and acceleration section, and a reaction section arranged in sequence from bottom to top; wherein, A desulfurizing agent releasing assembly is arranged in the inlet contraction section, which is used to release the desulfurizing agent; a flow rectification long-diameter pipeline is arranged in the flow rectification and acceleration section, and a flow disturbing assembly is arranged in the reaction section; and, The flue gas to be treated entering from below the inlet contraction section is mixed with the desulfurizing agent, the flue gas mixed with the desulfurizing agent is accelerated by the flow rectification long-diameter pipeline and reaches the reaction section, and the flue gas mixed with the desulfurizing agent is fully reacted with the desulfurizing agent by the flow disturbing of the flow disturbing assembly and flows out from above the reaction section.

[0009] In addition, the optional scheme is that the flow rectification long-diameter pipeline is provided with at least two in the flow rectification and acceleration section; and, The rectification long-diameter pipeline is uniformly distributed in the rectification acceleration section.

[0010] In addition, the rectification long-diameter pipeline comprises a contraction zone, a long-diameter pipeline and an expansion zone; wherein, The contraction zone is arranged below the long-diameter pipeline, and the expansion zone is arranged above the long-diameter pipeline.

[0011] In addition, the rectification long-diameter pipeline comprises a contraction zone, a long-diameter pipeline and an expansion zone; wherein, The rectification long-diameter pipeline is uniformly distributed in the rectification acceleration section.

[0012] In addition, the rectification long-diameter pipeline comprises a contraction zone, a long-diameter pipeline and an expansion zone; wherein, At least two rectification fan blades are arranged on the output rod of the rectification motor.

[0013] In addition, a cooling and humidifying section is arranged below the inlet contraction section, and the to-be-treated flue gas enters the inlet contraction section after being humidified and cooled by the cooling and humidifying section.

[0014] In addition, a water spraying and cooling assembly is arranged in the cooling and humidifying section, and the water spraying and cooling assembly comprises a water spraying pipe and a water spraying nozzle arranged on the water spraying pipe.

[0015] In addition, the desulfurizing agent releasing assembly comprises a material spraying pipe and a material spraying nozzle arranged on the material spraying pipe.

[0016] In addition, the spraying directions of the water spraying nozzle and the material spraying nozzle are both downward.

[0017] In addition, the water spraying and cooling assembly is arranged in the cooling and humidifying section, and the water spraying and cooling assembly comprises a water spraying pipe and a water spraying nozzle arranged on the water spraying pipe. The to-be-treated flue gas enters the inlet contraction section from below the inlet contraction section and is mixed with the desulfurizing agent in the inlet contraction section. The flue gas mixed with the desulfurizing agent is accelerated by the rectification long-diameter pipeline and reaches the reaction section. The flue gas mixed with the desulfurizing agent is disturbed by the disturbance assembly in the reaction section, fully reacts with the desulfurizing agent and flows out from above the reaction section.

[0018] Compared with the prior art, the above-mentioned boiler flue gas desulfurization reactor and its treatment method provided by the present application have the following beneficial effects: By setting the inlet contraction section, the flow rectification acceleration section and the reaction section in turn from bottom to top, a stable and fast flow field can be formed inside the reactor by using the Venturi principle, and the desulfurization efficiency can be effectively improved; in addition, by setting the desulfurizer release assembly in the inlet contraction section, the desulfurizer can be accelerated together with the flue gas in the flow rectification acceleration section, and the accelerated flue gas will fully react with the desulfurizer under the disturbance of the flow rectification assembly after reaching the reaction section, thereby effectively improving the desulfurization effect of the flue gas.

[0019] To the accomplishment of the foregoing and related ends, one or more aspects of the application, as hereinafter more fully described, relate to the following clauses and combinations thereof. The following description as well as the recitation of elements in claims to follow, shall be understood are illustrative only. The features and combinations thereof described herein are capable of independent use other than to solve a particular problem or meet a particular need disclosed herein. In the following description, numerous specific details are referenced to facilitate a thorough understanding of the application. However, one of ordinary skill in the art will recognize that the application can be practiced without these specific details. In other instances, well-known methods and structures have not been described in order to avoid obscuring the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other objects and results of the application will become more fully understood and appreciated with reference to the following description taken in conjunction with the accompanying drawings, in which: Figure 1 A front view cross section of a boiler flue gas desulfurization reactor provided according to an embodiment of the application; Figure 2 A top view cross section of a flow rectification acceleration section provided according to an embodiment of the application; Figure 3 A partial front view cross section of a flow rectification assembly provided according to an embodiment of the application; Figure 4 A partial front view cross section of a flow rectification long-diameter pipeline provided according to an embodiment of the application; Figure 5 A top view cross section of a water spray cooling assembly provided according to an embodiment of the application; Figure 6 A top view cross section of a desulfurizer release assembly provided according to an embodiment of the application; Legend: cooling and humidifying section 1, inlet contraction section 2, flow rectification acceleration section 3, expansion reaction section 4, outlet reaction section 5, water spray cooling assembly 6, water spray pipe 61, communication pipe 62, spray nozzle 7, spray pipe 71, spoiler plate 8, flow rectification long-diameter pipeline 9, contraction zone 91, long-diameter pipeline 92, expansion zone 93, sealing plate 10, support wall 11, output rod 12, flow rectification motor 13, flow rectification fan blade 14. DETAILED DESCRIPTION

[0021] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It can be evident, however, that embodiments can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0022] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate structural member, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] The structure of the boiler flue gas desulfurization reactor provided by the present application is described in detail below, Figure 1 The front view cross-sectional structure of the boiler flue gas desulfurization reactor provided by the embodiment of the present application is shown.

[0024] As shown in Figure 1 The boiler flue gas desulfurization reactor provided by the embodiment of the present application comprises an inlet contraction section 2, a flow straightening and accelerating section 3 and a reaction section arranged in sequence from bottom to top; wherein a desulfurizer releasing assembly is arranged in the inlet contraction section 2, the desulfurizer releasing assembly is used to release desulfurizer in the inlet contraction section 2; a flow straightening long-diameter pipeline 9 is arranged in the flow straightening and accelerating section 3, and a turbulence assembly is arranged in the reaction section.

[0025] In actual operation, the flue gas to be treated enters from below the inlet contraction section 2. At this time, the desulfurizing agent is released through the desulfurizing agent release component. The flue gas to be treated mixes with the desulfurizing agent in the inlet contraction section 2. The flue gas mixed with the desulfurizing agent will enter the rectification and acceleration section 3 rapidly based on the Venturi principle, and will be accelerated through the rectification long-diameter pipe 9 in the rectification and acceleration section 3 until it reaches the reaction section. After reaching the reaction section, the flue gas mixed with the desulfurizing agent still has high kinetic energy. At this time, due to the presence of the turbulence component in the reaction section, the flue gas with high kinetic energy will be disturbed. Under the disturbance of the turbulence component, the flue gas and the desulfurizing agent will react fully to achieve desulfurization. The desulfurized flue gas flows out from above the reaction section.

[0026] Furthermore, the reaction section may further include an expansion reaction section 4 and an outlet reaction section 5. The expansion reaction section 4 is used to cooperate with the inlet contraction section 2 and the rectification acceleration section 3 to form a first-stage Venturi structure, thereby effectively improving the flow velocity and flow stability of the flue gas. In addition, the turbulence component is preferably set in the outlet reaction section 5. The flue gas with high kinetic energy comes into contact with the turbulence component in the outlet reaction section 5. At this time, under the disturbance of the turbulence component, part of the flue gas will return to the expansion reaction section 4 to fully react with the desulfurizer.

[0027] Furthermore, Figure 2 The diagram shows a top view cross-sectional structure of the rectifier acceleration section 3 provided according to an embodiment of the present invention, in conjunction with... Figure 1 and Figure 2 It is known that multiple (at least two) of the rectifier long diameter pipes 9 are usually provided in the support arm 11 of the rectifier acceleration section 3. Adjacent rectifier long diameter pipes 9 are connected to each other and to the support wall 11 through the sealing plate 10. Furthermore, the rectifier long diameter pipes 9 are evenly distributed in the rectifier acceleration section 3. Such evenly distributed rectifier long diameter pipes 9 have the characteristics of uniform stress and stable structure.

[0028] In one specific embodiment of the present invention, such as Figure 2 As shown, a long-diameter rectifier pipe 9 can be set at the center of the rectifier acceleration section 3, and then six long-diameter rectifier pipes can be set around the long-diameter rectifier pipe 9 at the center to form a seven-hole structure. The seven-hole structure uses seven circular holes of equal diameter, distributed with one circular hole in the center and six circular holes around the perimeter. The centers of the six circular holes around the perimeter are located on the same circumference. This structure has a large flow area ratio in the rectifier section and has advantages such as uniform and stable flow, low resistance, and low wear.

[0029] also, Figure 4 This diagram shows a partial front view cross-sectional structure of the rectifying long-diameter pipe 9 provided according to an embodiment of the present invention, consisting of... Figure 4As can be seen, in a preferred embodiment of the present invention, the rectifying long-diameter pipe 9 may further include a contraction zone 91, a long-diameter pipe 92, and an expansion zone 93; wherein, the contraction zone 91 is disposed below the long-diameter pipe 92, and the expansion zone 93 is disposed above the long-diameter pipe 92. Through this design, a two-stage Venturi structure can be formed inside the rectifying long-diameter pipe 9. The boiler flue gas desulfurization reactor provided by the present invention improves the flow velocity and flow stability of the flue gas by nesting a two-stage Venturi structure inside a first-stage Venturi structure, thereby further improving the desulfurization efficiency.

[0030] Specifically, to achieve the disturbance effect of the turbulence component on the flue gas mixed with desulfurizing agent, the turbulence component may include multiple turbulence plates 8 (at least two turbulence plates 8), such as... Figure 1 As shown, the baffles 8 can be placed alternately from bottom to top and left to right within the outlet reaction section 5, thereby effectively improving the turbulence effect of the baffle assembly. Of course, the baffles 8 can also be arranged in other ways. For example, the baffles 8 can be used to create a spiral flue for the flue gas in the reaction zone, and the flue gas is turbulent through the spiral flue.

[0031] in addition, Figure 3 A partial front view cross-sectional structure of a turbulence assembly provided according to an embodiment of the present invention is shown, such as... Figure 3 As shown, in a preferred embodiment of the present invention, the turbulence assembly may also include a turbulence motor 13 disposed within the outlet reaction section 5; wherein, multiple (at least two) turbulence fan blades 14 are disposed on the output rod 12 of the turbulence motor 13; in actual use, when the flue gas mixed with desulfurizing agent enters the reaction zone, the turbulence motor 13 will drive the turbulence fan blades 14 to rotate slowly, thereby achieving sufficient turbulence of the flue gas mixed with desulfurizing agent through the rotation of the turbulence fan blades 14, thereby effectively improving the flue gas desulfurization effect.

[0032] It should be noted that the flue gas to be treated generated by the boiler usually has an extremely high temperature. However, the reaction effect between the high temperature flue gas and the desulfurizing agent is not good. In order to improve the desulfurization efficiency, a cooling and humidifying section 1 can be set below the inlet contraction section 2. After the flue gas to be treated is humidified and cooled by the cooling and humidifying section 1, it enters the inlet contraction section 2 and mixes with the desulfurizing agent, thereby effectively improving the reaction efficiency between the flue gas and the desulfurizing agent.

[0033] Specifically, Figure 5 The top view cross-sectional structure of the water spray cooling assembly 6 provided according to an embodiment of the present invention is shown, as follows: Figure 5As shown, to achieve the cooling effect of the cooling and humidification section 1, a water spray cooling component 6 can be installed within the cooling and humidification section 1. The water spray cooling component 6 may include multiple annular water spray pipes 61 arranged from the outside to the inside, with the inner diameter of the multiple annular water spray pipes 61 increasing sequentially from the inside to the outside. Adjacent water spray pipes 61 are connected by a connecting pipe 62, and each water spray pipe 61 is equipped with multiple water spray nozzles. In actual use, the water spray nozzles on the multiple water spray pipes 61 spray water downwards simultaneously, thereby effectively improving the cooling effect on the flue gas.

[0034] More specifically, Figure 6 The top cross-sectional structure of the desulfurizing agent release assembly provided according to an embodiment of the present invention is shown, such as... Figure 6 As shown, the desulfurizing agent release assembly may also include multiple spray pipes 71 (at least two, such as six) and spray nozzles 7 disposed on the spray pipes 71. In actual use, the desulfurizing agent (slaked lime powder, baking soda, etc.) is transported by external air force through the spray pipes 71 to the middle of the inlet contraction section 2, and then sprayed in the inlet contraction section 2 to fully mix with the flue gas. Then, it is accelerated with the flue gas in the rectification and acceleration section 3 and forms a jet. Finally, it is disturbed in the reaction section to achieve a full reaction.

[0035] It should be noted that the spraying direction of both the water spray nozzle and the material spray nozzle 7 is preferably downward. In this case, the water spraying direction of the water spray nozzle and the material spraying direction of the material spray nozzle 7 are opposite to the flow direction of the flue gas, which can effectively improve the cooling effect of the flue gas and the mixing effect of the flue gas and the desulfurizing agent.

[0036] On the other hand, to further illustrate the working principle of the boiler flue gas desulfurization reactor provided by the present invention, the present invention also provides a boiler flue gas treatment method, which is based on the aforementioned boiler flue gas desulfurization reactor; including: The flue gas to be treated enters the inlet contraction section 2 from below and mixes with the desulfurizing agent in the inlet contraction section 2; The flue gas mixed with desulfurizing agent is accelerated through the rectifier long-diameter pipe 9 and then reaches the reaction section; The flue gas mixed with desulfurizing agent is turbulent in the reaction section by the turbulence component, reacts fully with the desulfurizing agent, and flows out from above the reaction section.

[0037] As can be seen from the above specific embodiments, the boiler flue gas desulfurization reactor and its treatment method provided by the present invention have at least the following advantages: 1. By using the inlet contraction section, rectification acceleration section and reaction section set from bottom to top, a stable and rapid flow field can be formed inside the reactor using the Venturi principle, which can effectively improve the desulfurization efficiency. 2. By setting a desulfurizer release component in the inlet contraction section, the desulfurizer can be accelerated together with the flue gas in the rectification and acceleration section. After the accelerated flue gas reaches the reaction section, it will fully react with the desulfurizer under the turbulence of the turbulence component, thereby effectively improving the desulfurization effect of the flue gas. 3. By setting the rectifier long-diameter pipe to include a contraction zone, a long-diameter pipe, and an expansion zone, a secondary Venturi structure can be formed inside the rectifier long-diameter pipe. By nesting a secondary Venturi structure inside the primary Venturi structure, the flow velocity and flow stability of the flue gas can be further improved, thereby enhancing the desulfurization effect.

[0038] As per the above reference Figures 1 to 6 The boiler flue gas desulfurization reactor and its treatment method according to the present invention are described by way of example. However, those skilled in the art should understand that various modifications can be made to the boiler flue gas desulfurization reactor and its treatment method according to the present invention without departing from the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A boiler flue gas desulfurization reactor, characterized in that, It includes, from bottom to top, an inlet contraction section, a rectification and acceleration section, and a reaction section; among which, A desulfurizing agent release assembly is installed within the inlet contraction section, the assembly being used to release the desulfurizing agent; a rectifier long-diameter pipe is installed within the rectification acceleration section, and a flow turbulence assembly is installed within the reaction section; furthermore... The flue gas to be treated enters from below the inlet contraction section and is mixed with the desulfurizing agent. The flue gas mixed with the desulfurizing agent is accelerated by the rectifier long diameter pipe and reaches the reaction section. The flue gas mixed with the desulfurizing agent is turbulent by the turbulence component and reacts fully with the desulfurizing agent before flowing out from above the reaction section.

2. The boiler flue gas desulfurization reactor as described in claim 1, characterized in that, At least two of the rectifier long-diameter pipes are provided within the rectifier acceleration section; and... The long-diameter rectifier pipes are uniformly distributed within the rectification and acceleration section.

3. The boiler flue gas desulfurization reactor as described in claim 2, characterized in that, The rectifier long-diameter pipe includes a contraction zone, a long-diameter pipe, and an expansion zone; wherein... The contraction zone is located below the long diameter pipe, and the expansion zone is located above the long diameter pipe.

4. The boiler flue gas desulfurization reactor as described in claim 3, characterized in that, The aerodynamic component includes at least two aerodynamic plates; and... The spoilers are placed alternately from bottom to top and left to right within the outlet reaction section.

5. The boiler flue gas desulfurization reactor as described in claim 4, characterized in that, The turbulence-inducing component includes a turbulence-inducing motor disposed within the outlet reaction section; wherein... At least two turbulence fan blades are provided on the output rod of the turbulence motor.

6. The boiler flue gas desulfurization reactor as described in claim 5, characterized in that, A cooling and humidifying section is provided below the inlet contraction section. The flue gas to be treated is humidified and cooled by the cooling and humidifying section before entering the inlet contraction section.

7. The boiler flue gas desulfurization reactor as described in claim 6, characterized in that, A water spray cooling component is provided in the cooling and humidification section. The water spray cooling component includes a water spray pipe and a water spray nozzle installed on the water spray pipe.

8. The boiler flue gas desulfurization reactor as described in claim 7, characterized in that, The desulfurizing agent release assembly includes a spray pipe and a spray nozzle disposed on the spray pipe.

9. The boiler flue gas desulfurization reactor as described in claim 8, characterized in that, Both the water nozzle and the material nozzle spray downwards.

10. A method for treating boiler flue gas, characterized in that, Treatment is performed using the boiler flue gas desulfurization reactor according to any one of claims 1 to 9; including: The flue gas to be treated enters the inlet contraction section from below and mixes with the desulfurizing agent in the inlet contraction section; The flue gas mixed with desulfurizing agent is accelerated through the rectifier long-diameter pipe and then reaches the reaction section; The flue gas mixed with desulfurizing agent is turbulent in the reaction section by the turbulence component, reacts fully with the desulfurizing agent, and flows out from above the reaction section.

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