Dry denitration system for waste incineration flue gas

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a waste incineration flue gas dry denitration system which comprises a reaction cylinder, a center block, a guide assembly and a flow dividing assembly, the reaction cylinder is vertically arranged, the center block is arranged in the reaction cylinder, a plurality of flue gas cavities are formed between the reaction cylinder and the center block, and flue gas is introduced from the bottoms of the flue gas cavities; the multiple smoke cavities are arranged in the circumferential direction of the reaction cylinder, a chemical cavity is formed between every two adjacent smoke cavities, and a denitration agent is introduced from the bottoms of the chemical cavities; the guide assembly is arranged on the central block and is used for guiding a denitration agent in the chemical cavity and flue gas in the flue gas cavity to rotate and mix at different angles in the circumferential direction of the reaction cylinder, so that the flue gas and the denitration agent rotate and intersect in the rising process, and the flue gas and the denitration agent are more easily and fully mixed to react; and the shunting assembly is arranged in the reaction cylinder and is used for separating the flue gas and the denitration agent in the vertical direction, so that the subsequent reduction reaction is prevented from being influenced by sudden local temperature drop caused by instantaneous generation of a large amount of chemical reactions.

Description

Technical Field

[0001] This invention relates to the technical field of waste gas treatment, and in particular to a dry denitrification system for waste incineration flue gas. Background Technology

[0002] SNCR denitrification technology reduces NOx to N2 and water without a catalyst by injecting an amino reducing agent or urea into the furnace or flue at a temperature range of 850℃ to 1000℃. Although it has low operating costs and a short construction period, making it suitable for small and medium-sized boilers, the injection of a 10% to 20% concentration of reducing agent solution will cause a sudden drop in temperature in the high-temperature reaction zone and uneven temperature in the reaction zone, resulting in a denitrification efficiency of only 30% to 50%. At 900℃, the denitrification effect is almost zero, and it will also affect the combustion efficiency in the furnace.

[0003] SCR denitrification technology has become the mainstream choice due to its low reaction temperature and high denitrification efficiency. However, the cost of its core component, the catalyst, accounts for 20% to 40% of the total system cost, and the operating cost accounts for 40% to 50%. In particular, low-temperature SCR catalysts are expensive, have a short service life, and are complex in process and difficult to maintain. They are also not well adapted to scenarios with large fluctuations in operating conditions, such as waste incineration.

[0004] PNCR technology, as a novel dry denitrification technology, polymerizes amino components onto polymer materials to form a powdered denitrification agent. This agent is then pneumatically conveyed and injected into a furnace at 800℃–900℃. At this high temperature, chemical bonds break, releasing amino functional groups that react with NOx. It boasts advantages such as simple process, low operating and maintenance costs, safe transportation and storage of the denitrification agent, and high denitrification rate. However, in practical applications, it has been found that when the polymeric denitrification agent is injected in powder form, uneven dispersion can lead to insufficient contact with the flue gas and incomplete reaction. This not only wastes the denitrification agent but also limits further improvement in its denitrification efficiency, making it difficult to meet increasingly stringent environmental emission requirements. Summary of the Invention

[0005] Therefore, it is necessary to provide a dry denitrification system for waste incineration flue gas to address the current problem of insufficient reaction between flue gas and polymeric denitrification agents.

[0006] The above objectives are achieved through the following technical solutions: A dry denitrification system for waste incineration flue gas includes a furnace and a reaction module. The furnace is fixedly installed and has two chambers, an upper chamber and a flue gas pipe. The flue gas in the furnace enters the upper chamber from the lower chamber and is then discharged from the flue gas pipe.

[0007] The reaction module includes a reaction cylinder, a central block, a guiding assembly, and a flow-dividing assembly. The reaction cylinder is vertically positioned inside the furnace, and the central block is positioned inside the reaction cylinder. Multiple flue chambers are provided between the reaction cylinder and the central block, connecting the upper and lower chambers. The multiple flue chambers are arranged along the circumferential direction of the reaction cylinder, and a chemical chamber is provided between two adjacent flue chambers. The denitrifying agent is introduced from the bottom of the chemical chamber. The guiding assembly is positioned on the central block and is used to guide the denitrifying agent in the chemical chamber and the flue gas in the flue chamber to rotate and mix at different angles in the circumferential direction of the reaction cylinder. The flow-dividing assembly is positioned inside the reaction cylinder and is used to separate the flue gas and the denitrifying agent in the vertical direction.

[0008] Preferably, the guiding component includes multiple sets of fixing sleeves, with each flue chamber and chemical chamber corresponding to a set of fixing sleeves. Each set of fixing sleeves is located between adjacent flue chambers and chemical chambers, and there are multiple fixing sleeves in each set. The fixing sleeves are set on the circumferential surface of the central block and their axes extend horizontally. Multiple fixing sleeves in the same set are arranged along the circumferential direction of the central block, and the line connecting them is inclined at an angle to the horizontal direction. Each fixing sleeve has a baffle on the side near the reaction cylinder, and each baffle is inclined relative to the horizontal direction. Each set of fixing sleeves can guide the flue gas in the corresponding flue chamber or the desulfurizing agent in the corresponding chemical chamber to move to the adjacent chemical chamber or flue chamber through the corresponding baffle. The diversion component divides the baffles into sections in the vertical direction according to the different lengths of the baffles, and separates the flue gas or desulfurizing agent passing through the baffles in different sections.

[0009] Preferably, the inclination direction of the multiple sets of fixing sleeves is consistent, and the inclination angle of the set of fixing sleeves corresponding to the medicine cavity is greater than the inclination angle of the set of fixing sleeves corresponding to the smoke cavity.

[0010] Preferably, a connecting plate is provided between two adjacent baffles in the same set of fixed sleeves to prevent flue gas or desulfurizing agent from passing between the two baffles; the multiple baffles corresponding to the same set of fixed sleeves are divided into a first part and a second part, the baffles of the second part are located above the baffles of the first part, the baffles of the first part are in contact with the reaction cylinder, and the length of the baffles of the second part in the axial direction of the corresponding fixed sleeve decreases from bottom to top; the diversion assembly includes multiple dividing frames, the multiple dividing frames are fitted onto the central block from the inside out, there is a gap between two adjacent dividing frames, each dividing frame corresponds to one baffle in each set of fixed sleeves and is located above the corresponding baffle.

[0011] Preferably, each baffle has a rotating shaft on the side near the fixed sleeve, and the baffle is rotatably connected to the fixed sleeve through the rotating shaft. The rotating shaft is coaxial with the fixed sleeve, and an elastic element for baffle reset is provided between the rotating shaft and the fixed sleeve. Each baffle has a through hole that can connect adjacent flue gas chambers and chemical chambers. The connecting plate is hinged to the adjacent baffle located above it, and its hinge axis is parallel to the axis of the rotating shaft. The connecting plate is slidably connected to the adjacent baffle located below it, and can slide and pass over the through hole on the corresponding baffle when the baffle rotates. Under normal conditions, the through holes on the two adjacent baffles are on the same side in the circumferential direction of the central block, and the flue gas chamber and chemical chamber are not connected through the through hole. When the movement speed of the flue gas in the flue gas chamber or the desulfurizing agent in the chemical chamber increases, the baffle can rotate, and the flue gas chamber and chemical chamber can be connected through the through hole.

[0012] Preferably, each of the two adjacent dividing frames has multiple grooves arranged vertically on the sides that are close to and far from each other.

[0013] Preferably, two grooves on two adjacent dividing frames that are close to each other are arranged opposite each other on the same horizontal plane.

[0014] Preferably, the central block is provided with partition plates that are the same number as the number of drug chambers. The central block is connected to the reaction cylinder through the partition plates. The drug chamber is formed by the baffles, partition plates, central block and reaction cylinder on two adjacent sets of fixed sleeves. There are multiple baffles in the first part. The baffles corresponding to the two sets of fixed sleeves adjacent to the drug chamber and located below are rotatably connected to the partition plates respectively.

[0015] Preferably, it also includes an installation plate, a distributor, and a feeding module. The installation plate is located between the upper and lower chambers. There are multiple reaction modules divided into multiple groups. The reaction cylinder in each reaction module passes through the installation plate and is connected to the installation plate. The partition plate in each reaction module is provided with a nozzle. Multiple nozzles in the same group are provided with a branch pipe. The feeding module delivers the desulfurizing agent to each branch pipe through the distributor.

[0016] Preferably, each branch pipe is equipped with a pressure sensor to detect the real-time pressure inside the pipe.

[0017] The beneficial effects of this invention are as follows: by coordinating the reaction cylinder and the central block, the thickness of the flue gas and denitrification agent is reduced, allowing the flue gas and denitrification agent to mix more thoroughly; the guide component allows the flue gas and denitrification agent to rotate and cross as they rise, making it easier to mix thoroughly and react; the diversion component separates the flue gas and desulfurization agent in the reaction cylinder into multiple portions, reducing the amount of flue gas and desulfurization agent mixed per unit time, and preventing a sudden drop in local temperature caused by a large amount of instantaneous chemical reaction from affecting the subsequent reduction reaction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a dry denitrification system for waste incineration flue gas provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a dry denitrification system for waste incineration flue gas provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the reaction module of a dry denitrification system for waste incineration flue gas provided in an embodiment of the present invention; Figure 4 A front view of the reaction module of a dry denitrification system for waste incineration flue gas provided in an embodiment of the present invention; Figure 5 for Figure 4 Sectional view along the middle AA direction; Figure 6 for Figure 5 Enlarged view of point B in the middle; Figure 7 The right view of the reaction module of a dry denitrification system for waste incineration flue gas provided in an embodiment of the present invention; Figure 8 for Figure 7 A cross-sectional view along the CC direction; Figure 9 A diagram showing the reaction module split of a dry denitrification system for waste incineration flue gas, provided in an embodiment of the present invention; Figure 10 This is a split diagram of a portion of the structure of a dry denitrification system for waste incineration flue gas provided in an embodiment of the present invention.

[0019] in: 100. Furnace chamber; 101. Exhaust pipe; 102. Reactor; 103. Center block; 104. Smoke chamber; 105. Chemical chamber; 110. Fixing sleeve; 111. Baffle; 112. Connecting plate; 113. Dividing frame; 114. Through hole; 115. Rotating shaft; 116. Elastic element; 117. Rotating groove; 118. Receiving groove; 119. Sliding groove; 120. Sliding rod; 121. Groove; 122. Mounting plate; 123. Distributor; 124. Branch pipe; 125. Nozzle; 126. Fixing frame; 127. Dividing plate; 128. Top block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] like Figures 1 to 10 As shown, this embodiment of the invention provides a dry denitrification system for waste incineration flue gas, including a furnace 100 and a reaction module. The furnace 100 is fixedly installed and has two chambers, an upper chamber and a lower chamber. An exhaust pipe 101 is provided above the furnace 100. The flue gas in the furnace 100 enters the upper chamber from the lower chamber and is then discharged from the exhaust pipe 101.

[0024] The reaction module includes a reaction cylinder 102, a central block 103, a guiding component, and a flow-dividing component. The reaction cylinder 102 is vertically arranged inside the furnace 100, and the central block 103 is arranged inside the reaction cylinder 102. Multiple smoke chambers 104 are provided between the reaction cylinder 102 and the central block 103. The smoke chambers 104 connect the upper and lower chambers and are arranged along the circumferential direction of the reaction cylinder 102. A chemical chamber 105 is provided between two adjacent smoke chambers 104, and the denitrifying agent is introduced from the bottom of the chemical chamber 105. The guiding component is arranged on the central block 103 and is used to guide the denitrifying agent in the chemical chamber 105 and the flue gas in the smoke chamber 104 to rotate and mix at different angles in the circumferential direction of the reaction cylinder 102. The flow-dividing component is arranged inside the reaction cylinder 102 and is used to separate the flue gas and the denitrifying agent in the vertical direction.

[0025] By coordinating the reaction cylinder 102 and the central block 103, the thickness of the flue gas and denitrification agent is reduced, allowing for more thorough mixing. A guiding component is installed so that the flue gas and denitrification agent rotate and cross as they rise, making it easier for them to mix and react fully. The diversion component separates the flue gas and desulfurization agent in the reaction cylinder 102 into multiple portions, reducing the amount of flue gas and desulfurization agent mixed per unit time and preventing a sudden drop in local temperature caused by a large amount of instantaneous chemical reaction, which would affect the subsequent reduction reaction.

[0026] In this embodiment, the guiding component includes multiple sets of fixing sleeves 110. Each flue chamber 104 and drug chamber 105 corresponds to a set of fixing sleeves 110, and each set of fixing sleeves 110 is located between adjacent flue chambers 104 and drug chambers 105. There are multiple fixing sleeves 110 in each set. The fixing sleeves 110 are disposed on the circumferential surface of the central block 103 and their axes extend horizontally. Multiple fixing sleeves 110 in the same set are arranged along the circumferential direction of the central block 103, and the line connecting them is inclined at an angle to the horizontal direction. Each fixing sleeve 110 is provided with a baffle 111 on the side near the reaction cylinder 102. Each baffle 111 is inclined relative to the horizontal direction. Each set of fixing sleeves 110 can guide the flue gas in the corresponding flue chamber 104 or the desulfurizing agent in the corresponding drug chamber 105 to move into the adjacent drug chamber 105 or flue chamber 104 through the corresponding baffle 111. The inclination of the multiple baffles 111 themselves plus the overall inclination can better change the movement direction of the flue gas or desulfurizing agent. Taking flue gas chamber 104 as an example, when flue gas enters the corresponding flue gas chamber 104, it will start to fill from the bottom of the flue gas chamber 104 and contact the lower surface of the baffle 111. Under the action of multiple baffles 111, it will move to the adjacent chemical chamber 105 and mix with the desulfurizing agent in the chemical chamber 105.

[0027] The diversion component divides the baffles 111 into sections in the vertical direction according to their different lengths, separating the flue gas or desulfurizing agent passing through different sections of the baffles 111. In the vertical direction, the flue gas or desulfurizing agent passes through the baffles 111 in different sections sequentially, thus separating them from each other. This prevents the flue gas and desulfurizing agent in adjacent sections from coming into contact and reacting, controlling the amount of reaction between the flue gas and the desulfurizing agent, reducing the intensity of the reaction, and avoiding strong chemical reactions that could lead to a local temperature drop in the flue gas and incomplete desulfurization.

[0028] Specifically, the vertical projections of the reaction cylinder 102 and the central block 103 are rectangles arranged from the inside out; the guide assembly includes four sets of fixing sleeves 110, which correspond to the four vertical surfaces on the central block 103 respectively, and each medicine chamber 105 and smoke chamber 104 spans two adjacent vertical surfaces of the central block 103.

[0029] In this embodiment, the multiple sets of fixing sleeves 110 are tilted in the same direction, and the tilt angle of the set of fixing sleeves 110 corresponding to the drug chamber 105 is greater than the tilt angle of the set of fixing sleeves 110 corresponding to the flue gas chamber 104. Under the guidance of the corresponding baffles 111, the desulfurizing agent moves at a greater speed in the circumferential direction of the reaction cylinder 102 than the flue gas moves in the circumferential direction of the reaction cylinder 102, resulting in more thorough mixing of the desulfurizing agent and the flue gas after contact.

[0030] In this embodiment, a connecting plate 112 is provided between two adjacent baffles 111 in the same set of fixed sleeves 110 to prevent flue gas or desulfurizing agent from passing between the two baffles 111; the multiple baffles 111 corresponding to the same set of fixed sleeves 110 are divided into a first part and a second part, the baffles 111 of the second part are located above the baffles 111 of the first part, the baffles 111 of the first part are in contact with the reaction cylinder 102, and the length of the baffles 111 of the second part in the axial direction of the corresponding fixed sleeve 110 is successively shortened from bottom to top; the diversion assembly includes multiple dividing frames 113, the multiple dividing frames 113 are disposed on the central block 103 from the inside out, there is a gap between two adjacent dividing frames 113, each dividing frame 113 corresponds to one baffle 111 in each set of fixed sleeves 110 and is located above the corresponding baffle 111.

[0031] The second part of the baffle 111 is stepped in the vertical direction. Multiple dividing frames 113 divide the multiple steps into multiple parts. The multiple dividing frames 113 have different lengths in the vertical direction to accommodate the baffles 111 in different positions. The distance between each dividing frame 113 and the corresponding baffle 111 is small. After the flue gas or desulfurizing agent enters the adjacent chemical chamber 105 or flue gas chamber 104 through the corresponding baffle 111, it will be separated by the dividing frame 113, thus completing the partitioning.

[0032] The connecting plate 112 allows flue gas or desulfurizing agent to pass only through the gap between the baffle 111 and the reaction cylinder 102, reducing the contact area between the flue gas and desulfurizing agent during rotation, thereby lowering the reaction rate and avoiding adverse effects from violent reactions. As the flue gas and desulfurizing agent rise, some of them mix again through the gap between another baffle 111 and the reaction cylinder 102 and are concentrated together by the corresponding dividing frame 113. The dividing frame 113 reduces the impact of the flue gas and desulfurizing agent in the chemical reaction stage on the surrounding flue gas or desulfurizing agent.

[0033] Specifically, the top of the reaction cylinder 102 is provided with a fixing frame 126, and each dividing frame 113 is installed on the fixing frame 126.

[0034] In this embodiment, each baffle 111 has a rotating shaft 115 on the side near the fixed sleeve 110. The baffle 111 is rotatably connected to the fixed sleeve 110 via the rotating shaft 115. The rotating shaft 115 is coaxial with the fixed sleeve 110. An elastic element 116 for resetting the baffle 111 is provided between the rotating shaft 115 and the fixed sleeve 110. Each baffle 111 has a through hole 114 that can connect adjacent smoke chambers 104 and medicine chambers 105. The connecting plate 112 is hinged to one of the adjacent baffles 111 located above it, and its hinge axis is parallel to the axis of the rotating shaft 115. The connecting plate 112 is slidably connected to the adjacent and lower baffle 111, and can slide and pass over the through hole 114 on the corresponding baffle 111 when the baffle 111 rotates. Under normal conditions, the through holes 114 on the two adjacent baffles 111 are on the same side of the central block 103 in the circumferential direction, and the flue gas chamber 104 and the chemical chamber 105 are not connected through the through hole 114. When the moving speed of the flue gas in the flue gas chamber 104 or the desulfurizing agent in the chemical chamber 105 increases, the baffle 111 can rotate, and the flue gas chamber 104 and the chemical chamber 105 are connected through the through hole 114.

[0035] Specifically, the fixing sleeve 110 is connected to the center block 103 by bolts. A rotating groove 117 and a receiving groove 118 are formed on the end face of the fixing sleeve 110. The rotating groove 117 communicates with the receiving groove 118. A rotating shaft 115 is rotatably disposed in the rotating groove 117. A top block 128 is provided on the rotating shaft 115 and is slidably disposed in the receiving groove 118. After the baffle 111 rotates at a certain angle, the top block 128 will abut against the fixing sleeve 110. The elastic element 116 is a spring, which is disposed in the receiving groove 118 and connects the fixing sleeve 110 and the baffle 111, used to reset the baffle 111. Each baffle 111 has a groove 119 on its upper surface, and the groove 119 spans the through hole 114; each connecting plate 112 has a slide rod 120, which is slidably disposed in the groove 119 and can rotate in the groove 119; each connecting plate 112 is hinged to the baffle 111 above it and slidably connected to the baffle 111 below it through the slide rod 120. Under normal conditions, the baffle 111 tilts at a certain angle under the action of the elastic element 116, which can guide the movement of flue gas or desulfurizing agent. The increased movement speed of flue gas or desulfurizing agent will increase the impact force on the baffle 111, causing the baffle 111 to rotate and compress the elastic element 116. The rotating baffle 111 will cause the connecting plate 112 sliding on it to slide and pass through the through hole 114, so that the through hole 114 is connected to the adjacent flue gas chamber 104 and the chemical chamber 105. This allows the flue gas and desulfurizing agent to mix a small amount in advance, increasing their mixing time and promoting more uniform mixing and more complete reaction of flue gas and desulfurizing agent.

[0036] In this embodiment, each of the two adjacent dividing frames 113 has a plurality of grooves 121 arranged vertically on the side that is close to and far from each other. When the mixed flue gas and desulfurizing agent pass through the grooves 121, the cross-sectional area of ​​their moving channel changes, and their moving speed changes. The mixed flue gas and desulfurizing agent will be further mixed as they pass through the grooves 121, thereby improving the mixing effect of flue gas and desulfurizing agent.

[0037] In this embodiment, two adjacent grooves 121 on two adjacent dividing frames 113 are arranged opposite each other on the same horizontal plane. The opposite arrangement of the two grooves 121 maximizes the difference in cross-sectional area between the mixed flue gas and the desulfurizing agent along the movement path, further improving the mixing effect of flue gas and desulfurizing agent.

[0038] In this embodiment, the central block 103 is provided with partition plates 127 in the same number as the drug chambers 105. The central block 103 is connected to the reaction cylinder 102 through the partition plates 127. The drug chamber 105 is formed by the baffles 111 on two adjacent sets of fixed sleeves 110, the partition plates 127, the central block 103, and the reaction cylinder 102. Multiple baffles 111 are provided in the first part. The baffles 111 corresponding to the two sets of fixed sleeves 110 adjacent to the drug chamber 105 and located below are respectively rotatably connected to the partition plates 127. The partition plates 127 and the baffles 111 in the first part can provide buffer space for the desulfurizing agent entering the drug chamber 105 and the flue gas in the flue gas chamber 104. At the same time, when the through hole 114 connects the adjacent flue gas chamber 104 and the drug chamber 105, it further increases the mixing time of flue gas and desulfurizing agent in the reaction cylinder 102.

[0039] In this embodiment, the dry denitrification system for waste incineration flue gas also includes an installation plate 122, a distributor 123, and a feeding module. The installation plate 122 is located between two upper and lower chambers. There are multiple reaction modules divided into multiple groups. The reaction cylinder 102 in each reaction module passes through the installation plate 122 and is connected to the installation plate 122. Each reaction module has a nozzle 125 on a partition plate 127. A branch pipe 124 is provided on multiple nozzles 125 in the same group. The feeding module delivers the desulfurizing agent evenly to each branch pipe 124 through the distributor 123.

[0040] The feeding module includes a main pipe and a power unit. The main pipe is connected to the distributor 123. When the desulfurizing agent delivered by the power unit through the main pipe reaches the distributor 123, it is evenly divided into a number of portions that match the number of branch pipes 124 and delivered to each branch pipe 124.

[0041] In this embodiment, each branch pipe 124 is equipped with a pressure sensor to detect the real-time pressure in the pipe. Based on the pressure changes of the pressure sensors in each pipe, it can be determined which branch pipe 124 is blocked, so that timely maintenance can be carried out to minimize the impact on the overall denitrification effect of the system.

[0042] The working principle of the dry denitrification system for waste incineration flue gas provided in the above embodiments is as follows: First, the power unit in the feeding module is activated, which transports the desulfurizing agent from the main pipe to the distributor 123. The distributor 123 then evenly distributes the desulfurizing agent into each branch pipe 124. The desulfurizing agent entering the branch pipe 124 is sprayed out from the corresponding nozzle 125 into the chemical chamber 105. At the same time, the flue gas passes through the lower chamber of the furnace 100 and enters the flue gas chamber 104.

[0043] The desulfurizing agent entering the chemical chamber 105 approaches the corresponding baffle 111 until contact, and then, guided by the baffle 111, moves towards the adjacent flue gas chamber 104. Similarly, the flue gas entering the flue gas chamber 104 approaches the corresponding baffle 111 until contact, and then, guided by the baffle 111, moves towards the adjacent chemical chamber 105. The flue gas and desulfurizing agent rotate in the same direction between the central block 103 and the reaction cylinder 102 under the guidance of the corresponding baffle 111. Because the inclination angle of the fixed sleeve 110 in the reaction assembly corresponding to the chemical chamber 105 is greater than that of the flue gas chamber 104... The tilt angle of the fixed sleeve 110 in the corresponding reaction assembly allows the desulfurizing agent to enter the flue gas chamber 104 through the gap between the baffle 111 and the reaction cylinder 102 during rotation, reacting with the flue gas. Similarly, the flue gas can enter the chemical chamber 105 to contact and react with the desulfurizing agent. The mixed flue gas and desulfurizing agent then move to one side of the horizontal direction of the partition frame, entering the flue gas and desulfurizing agent on the same side of the partition plate 127 for further reaction. When passing through the groove 121 on the partition plate 127, the flow velocity changes, allowing the mixed flue gas and desulfurizing agent to mix again. Then, it enters the upper chamber of the furnace 100 from the top of the reaction cylinder 102 and is finally discharged from the exhaust pipe 101.

[0044] When the speed of the flue gas entering the flue chamber 104 increases, the speed of the flue gas entering the chemical chamber 105 will also increase, and the impact force on the corresponding baffle 111 will increase accordingly. (Similarly, the speed of the desulfurizing agent is adaptively adjusted according to the change of flue gas speed.) The baffle 111 will rotate and compress the elastic element 116 when subjected to a large impact. The rotation of the baffle 111 will drive the connecting plate 112 sliding on it to slide in the slide groove 119. The sliding of the connecting plate 112 will pass through the through hole 114, so that the through hole 114 connects the adjacent flue chamber 104 and the chemical chamber 105. The flue gas in the flue chamber 104 and the desulfurizing agent in the chemical chamber 105 will be mixed in a small amount through the through hole 114. This not only prolongs the residence time of the mixed flue gas and desulfurizing agent in the reaction cylinder 102, but also ensures that the flue gas and desulfurizing agent react fully.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A dry denitrification system for waste incineration flue gas, characterized in that, It includes a furnace and a reaction module. The furnace is fixedly installed and has two chambers, an upper chamber and a lower chamber. The upper chamber has a flue pipe. The flue gas in the furnace enters the upper chamber from the lower chamber and is then discharged from the flue pipe. The reaction module includes a reaction cylinder, a central block, a guiding assembly, and a flow distribution assembly. The reaction cylinder is vertically positioned inside the furnace, and the central block is positioned inside the reaction cylinder. Multiple flue chambers are provided between the reaction cylinder and the central block, connecting the upper and lower chambers. The multiple flue chambers are arranged along the circumferential direction of the reaction cylinder, and a chemical chamber is provided between two adjacent flue chambers. The denitrification agent is introduced from the bottom of the chemical chamber. The guiding assembly is located on the central block and is used to guide the denitrification agent in the chemical chamber and the flue gas in the flue chamber to rotate and mix at different angles along the circumferential direction of the reaction cylinder. The flow divider is located inside the reaction chamber and is used to separate the flue gas and the denitrification agent in the vertical direction.

2. The dry denitrification system for waste incineration flue gas according to claim 1, characterized in that, The guiding component includes multiple sets of fixing sleeves. Each flue chamber and chemical chamber corresponds to one set of fixing sleeves, and each set of fixing sleeves is located between adjacent flue chambers and chemical chambers. There are multiple fixing sleeves in each set. The fixing sleeves are set on the circumferential surface of the central block and their axis extends horizontally. Multiple fixing sleeves in the same set are arranged along the circumferential direction of the central block, and the line connecting them is inclined at an angle to the horizontal direction. Each fixing sleeve has a baffle on the side near the reaction cylinder, and each baffle is inclined relative to the horizontal direction. Each set of fixing sleeves can guide the flue gas in the corresponding flue chamber or the desulfurizing agent in the corresponding chemical chamber to move to the adjacent chemical chamber or flue chamber through the corresponding baffle. The diversion component divides the baffles into sections in the vertical direction according to their different lengths, and separates the flue gas or desulfurizing agent passing through the baffles in different sections.

3. The dry denitrification system for waste incineration flue gas according to claim 2, characterized in that, The tilting direction of multiple sets of fixing sleeves is consistent, and the tilting angle of the set of fixing sleeves corresponding to the medicine cavity is greater than the tilting angle of the set of fixing sleeves corresponding to the smoke cavity.

4. The dry denitrification system for waste incineration flue gas according to claim 2, characterized in that, A connecting plate is provided between two adjacent baffles in the same set of fixed sleeves to prevent flue gas or desulfurizing agent from passing between the two baffles; the multiple baffles corresponding to the same set of fixed sleeves are divided into a first part and a second part, the baffles of the second part are located above the baffles of the first part, the baffles of the first part are in contact with the reaction cylinder, and the length of the baffles of the second part in the axial direction of the corresponding fixed sleeve decreases from bottom to top; the diversion assembly includes multiple dividing frames, which are installed on the central block from the inside out, and there is a gap between two adjacent dividing frames. Each dividing frame corresponds to one baffle in each set of fixed sleeves and is located above the corresponding baffle.

5. The dry denitrification system for waste incineration flue gas according to claim 4, characterized in that, Each baffle has a rotating shaft on the side near the fixed sleeve. The baffle is rotatably connected to the fixed sleeve via the rotating shaft, which is coaxial with the fixed sleeve. An elastic element for baffle resetting is provided between the rotating shaft and the fixed sleeve. Each baffle has a through hole that connects adjacent flue gas chambers and chemical chambers. A connecting plate is hinged to the adjacent baffle located above it, with its hinge axis parallel to the axis of the rotating shaft. The connecting plate is slidably connected to the adjacent baffle located below it, and can slide and pass over the through hole on the corresponding baffle when the baffle rotates. Under normal conditions, the through holes on the two adjacent baffles are on the same side of the central block in the circumferential direction, and the flue gas chamber and chemical chamber are not connected through the through hole. When the movement speed of the flue gas in the flue gas chamber or the desulfurizing agent in the chemical chamber increases, the baffle can rotate, and the flue gas chamber and chemical chamber can be connected through the through hole.

6. The dry denitrification system for waste incineration flue gas according to claim 4, characterized in that, Each of the two adjacent dividing frames has multiple grooves arranged vertically on the sides that are close to and far from each other.

7. A dry denitrification system for waste incineration flue gas according to claim 6, characterized in that, Two adjacent grooves on two separate dividing frames are positioned opposite each other on the same horizontal plane.

8. A dry denitrification system for waste incineration flue gas according to claim 4, characterized in that, The central block is equipped with partition plates that are the same number as the drug chambers. The central block is connected to the reaction cylinder through the partition plates. The drug chambers are formed by the baffles, partition plates, central block and reaction cylinder on two adjacent sets of fixed sleeves. There are multiple baffles in the first part. The baffles corresponding to the two sets of fixed sleeves adjacent to the drug chambers and located below are rotatably connected to the partition plates.

9. A dry denitrification system for waste incineration flue gas according to claim 8, characterized in that, It also includes an installation plate, a distributor, and a feeding module. The installation plate is located between the upper and lower chambers. There are multiple reaction modules divided into multiple groups. The reaction cylinder in each reaction module passes through the installation plate and is connected to the installation plate. Each reaction module has a nozzle on the partition plate. Multiple nozzles in the same group are provided with a branch pipe. The feeding module delivers the desulfurizing agent to each branch pipe through the distributor.

10. A dry denitrification system for waste incineration flue gas according to claim 9, characterized in that, Each branch pipe is equipped with a pressure sensor to detect the real-time pressure inside the pipe.

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