A dry denitration system for waste incineration flue gas

Abstract

The present application relates to the technical field of waste gas treatment, in particular to a garbage incineration flue gas dry denitration system, which comprises a reaction cylinder, a center block, a guide assembly and a shunt assembly, the reaction cylinder is vertically arranged, the center block is arranged in the reaction cylinder, a plurality of smoke cavities are arranged between the reaction cylinder and the center block, and the flue gas is introduced from the bottom of the smoke cavity; the plurality of smoke cavities are arranged along the circumferential direction of the reaction cylinder, one medicine cavity is arranged between two adjacent smoke cavities, and the denitration agent is introduced from the bottom of the medicine cavity; the guide assembly is arranged on the center block and is used for guiding the denitration agent in the medicine cavity and the flue gas in the smoke cavity to rotate at different angles in the circumferential direction of the reaction cylinder and mix, so that the flue gas and the denitration agent rotate and cross during the ascending process, and the reaction is more easily mixed and reacted; the shunt assembly is arranged in the reaction cylinder and is used for separating the flue gas and the denitration agent in the vertical direction, so as to prevent the local temperature from suddenly dropping due to a large amount of instantaneous chemical reaction and affecting the subsequent reduction reaction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to a garbage incineration flue gas dry denitration system. BACKGROUND

[0002] SNCR denitration technology can reduce NOx to N2 and water by spraying amino reducing agent or urea in the 850-1000 DEG C temperature zone of the furnace or flue without catalyst, which is suitable for small and medium-sized boilers due to low operation cost and short construction period, but 10-20% concentration of reducing agent aqueous solution sprayed will cause sudden temperature drop in high temperature reaction zone, and uneven temperature in reaction zone, resulting in denitration efficiency of only 30-50%, and denitration effect of almost zero at 900 DEG C, which will also affect the combustion efficiency in the furnace.

[0003] SCR denitration technology has become the mainstream choice due to low reaction temperature and high denitration efficiency, but the cost of catalyst, the core component, accounts for 20-40% of the total system cost, and the operation cost accounts for 40-50%; especially the low-temperature SCR catalyst is expensive and has short service life, and the process is complex and difficult to maintain, which is not suitable for scenes with large fluctuations such as garbage incineration.

[0004] PNCR technology as a new type of dry denitration technology loads amino components on high molecular materials to form a powder denitrification agent, which is sprayed into the 800-900 DEG C furnace through pneumatic conveying, and the chemical bond is broken at high temperature to release amino functional groups to react with NOx, which has the advantages of simple process, low operation and maintenance cost, safe transportation and storage of denitrification agent, and high denitration rate. However, it is found in actual application that the high molecular denitrification agent is easy to cause incomplete contact with flue gas and incomplete reaction due to uneven dispersion after being sprayed in the form of powder, which not only causes waste of denitrification agent, but also limits the further improvement of its denitration efficiency, which is difficult to meet the increasingly strict environmental protection emission requirements. SUMMARY

[0005] Therefore, it is necessary to provide a garbage incineration flue gas dry denitration system in view of the problem that the flue gas does not react sufficiently with the high molecular denitrification agent.

[0006] The above-mentioned purpose is achieved by the following technical solutions:

[0007] A garbage incineration flue gas dry denitration system, comprising a furnace and a reaction module, the furnace is fixedly arranged, and two chambers are arranged in the furnace, a flue gas discharge pipe is arranged above the furnace, flue gas in the furnace enters the upper chamber from the lower chamber, and then is discharged from the flue gas discharge pipe.

[0008] The reaction module comprises a reaction cylinder, a center block, a guide assembly and a flow separation assembly. The reaction cylinder is vertically arranged in the furnace chamber. The center block is arranged in the reaction cylinder. A plurality of smoke cavities are arranged between the reaction cylinder and the center block. The smoke cavities are connected with the upper and lower chambers. The plurality of smoke cavities are arranged along the circumferential direction of the reaction cylinder. One medicine cavity is arranged between two adjacent smoke cavities. The denitration agent is introduced from the bottom of the medicine cavity. The guide assembly is arranged on the center block and is used for guiding the denitration agent in the medicine cavity and the flue gas in the smoke cavity to rotate at different angles in the circumferential direction of the reaction cylinder and mix. The flow separation assembly is arranged in the reaction cylinder and is used for separating the flue gas and the denitration agent in the vertical direction.

[0009] Preferably, the guide assembly comprises a plurality of fixed sleeves. Each smoke cavity and medicine cavity corresponds to a group of fixed sleeves. Each group of fixed sleeves is located between the adjacent smoke cavity and medicine cavity. The number of each group of fixed sleeves is multiple. The fixed sleeves are arranged on the peripheral surface of the center block and the axis thereof extends in the horizontal direction. The multiple fixed sleeves in the same group are arranged along the circumferential direction of the center block and the connecting line between them has an inclination angle with the horizontal direction. Each fixed sleeve is provided with a baffle on the side close to the reaction cylinder. Each baffle is arranged inclinedly relative to the horizontal direction. Each group of fixed sleeves can guide the flue gas in the corresponding smoke cavity or the denitration agent in the corresponding medicine cavity to move into the adjacent medicine cavity or smoke cavity through the corresponding baffle. The flow separation assembly divides the baffles into different zones in the vertical direction according to the different lengths of the baffles and separates the flue gas or denitration agent passing through the baffles in different zones.

[0010] Preferably, the inclination directions of the multiple groups of fixed sleeves are consistent. The inclination angle of the group of fixed sleeves corresponding to the medicine cavity is greater than the inclination angle of the group of fixed sleeves corresponding to the smoke cavity.

[0011] Preferably, the two baffles between the fixed sleeves in the same group are provided with a connecting plate for blocking the flue gas or denitration agent from passing through the two baffles. The multiple baffles corresponding to the same group of fixed sleeves are divided into a first part and a second part. The baffles in the second part are located above the baffles in the first part. The baffles in the first part are in contact with the reaction cylinder. The length of the baffles in the second part in the axial direction of the corresponding fixed sleeve gradually decreases from bottom to top. The flow separation assembly comprises a plurality of division frames. The plurality of division frames are arranged on the center block from inside to outside. A spacing is arranged between the two adjacent division frames. Each division frame corresponds to one baffle in each group of fixed sleeves and is located above the corresponding baffle.

[0012] 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 smoke chambers and medicine 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 smoke chamber and medicine chamber are not connected through the through hole. When the movement speed of the flue gas in the smoke chamber or the denitrifying agent in the medicine chamber increases, the baffle can rotate, and the smoke chamber and medicine chamber can be connected through the through hole.

[0013] 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.

[0014] Preferably, two grooves on two adjacent dividing frames that are close to each other are arranged opposite each other on the same horizontal plane.

[0015] 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.

[0016] 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 denitrification agent to each branch pipe through the distributor.

[0017] Preferably, each branch pipe is equipped with a pressure sensor to detect the real-time pressure inside the pipe.

[0018] 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 the denitrification agent is reduced, allowing the flue gas and the denitrification agent to mix more thoroughly; the guide component allows the flue gas and the 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 the denitrification agent in the reaction cylinder into multiple portions, reducing the amount of flue gas and the denitrification 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

[0019] 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;

[0020] Figure 2 An internal structure schematic view of a garbage incineration flue gas dry denitration system provided by the embodiment of the present application is provided.

[0021] Figure 3 A structure schematic view of a reaction module of a garbage incineration flue gas dry denitration system provided by the embodiment of the present application is provided.

[0022] Figure 4 A front view of a reaction module of a garbage incineration flue gas dry denitration system provided by the embodiment of the present application is provided.

[0023] Figure 5 A Figure 4 sectional view in A-A direction;

[0024] Figure 6 A Figure 5 enlarged view at B;

[0025] Figure 7 A right view of a reaction module of a garbage incineration flue gas dry denitration system provided by the embodiment of the present application is provided.

[0026] Figure 8 A Figure 7 sectional view in C-C direction;

[0027] Figure 9 A split view of a reaction module of a garbage incineration flue gas dry denitration system provided by the embodiment of the present application is provided.

[0028] Figure 10 A split view of part of structure in a reaction module of a garbage incineration flue gas dry denitration system provided by the embodiment of the present application is provided.

[0029] Wherein:

[0030] 100, furnace; 101, exhaust pipe; 102, reaction cylinder; 103, center block; 104, smoke cavity; 105, medicine cavity; 110, fixed sleeve; 111, baffle; 112, connecting plate; 113, split frame; 114, through hole; 115, rotating shaft; 116, elastic member; 117, rotating groove; 118, containing groove; 119, sliding groove; 120, sliding rod; 121, groove; 122, mounting plate; 123, distributor; 124, branch pipe; 125, nozzle; 126, fixing frame; 127, partition plate; 128, top block. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will further describe the present application by embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

[0032] The numbers of components in the specification of the present application, such as "first", "second", etc., are used only to distinguish the described objects, and do not have any sequential or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does 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.

[0033] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0034] As shown in Figures 1 to 10 The embodiment of the present application provides a waste incineration flue gas dry denitration system, which comprises a hearth 100 and a reaction module. The hearth 100 is fixedly arranged, and two chambers are arranged in the hearth 100. An exhaust pipe 101 is arranged above the hearth 100. The flue gas in the hearth 100 enters the upper chamber from the lower chamber, and is then discharged from the exhaust pipe 101.

[0035] The reaction module comprises a reaction cylinder 102, a center block 103, a guide assembly and a flow dividing assembly. The reaction cylinder 102 is vertically arranged in the hearth 100, and the center block 103 is arranged in the reaction cylinder 102. A plurality of smoke chambers 104 are arranged between the reaction cylinder 102 and the center block 103. The smoke chambers 104 are communicated with the upper and lower chambers. The plurality of smoke chambers 104 are arranged along the circumferential direction of the reaction cylinder 102. A medicine chamber 105 is arranged between two adjacent smoke chambers 104. The denitration agent is introduced from the bottom of the medicine chamber 105. The guide assembly is arranged on the center block 103 and is used for guiding the denitration agent in the medicine chamber 105 and the flue gas in the smoke chamber 104 to rotate at different angles in the circumferential direction of the reaction cylinder 102 and mix. The flow dividing assembly is arranged in the reaction cylinder 102 and is used for separating the flue gas and the denitration agent in the vertical direction.

[0036] The cooperation of the reaction cylinder 102 and the center block 103 reduces the thickness of the flue gas and the denitration agent, so that the flue gas and the denitration agent can be mixed more fully; the guide assembly is arranged to make the flue gas and the denitration agent rotate and cross during the ascending process, so that the flue gas and the denitration agent are more likely to fully mix and react; the shunt assembly separates the flue gas and the denitration agent in the reaction cylinder 102 into multiple parts, reduces the mixing amount of the flue gas and the denitration agent per unit time, and prevents the instantaneous generation of a large amount of chemical reaction from causing a local temperature drop to affect the subsequent reduction reaction.

[0037] In the embodiment, the guide assembly includes a plurality of fixed sleeves 110, each smoke cavity 104 and each medicine cavity 105 corresponds to a group of fixed sleeves 110, and each group of fixed sleeves 110 is located between adjacent smoke cavities 104 and medicine cavities 105, the number of each group of fixed sleeves 110 is multiple, the fixed sleeves 110 are arranged on the circumferential surface of the center block 103 and the axis thereof extends in the horizontal direction, the multiple fixed sleeves 110 in the same group are arranged in the circumferential direction of the center block 103 and the connecting line between the multiple fixed sleeves 110 in the same group and the horizontal direction is provided with an inclination angle; each fixed sleeve 110 is provided with a baffle 111 on the side close to the reaction cylinder 102, and each baffle 111 is arranged inclined to the horizontal direction; each group of fixed sleeves 110 can guide the flue gas in the corresponding smoke cavity 104 or the denitration agent in the corresponding medicine cavity 105 to move into the adjacent medicine cavity 105 or smoke cavity 104 through the corresponding baffle 111; the inclination of the multiple baffles 111 and the overall inclination can better change the moving direction of the flue gas or the denitration agent. Taking the smoke cavity 104 as an example, when the flue gas enters the corresponding smoke cavity 104, the flue gas will fill from the bottom end of the smoke cavity 104 and contact the lower surface of the baffle 111, and move to the adjacent medicine cavity 105 under the action of the multiple baffles 111 and mix with the denitration agent in the medicine cavity 105.

[0038] The shunt assembly divides the baffles 111 into different zones in the vertical direction according to the different lengths of the baffles 111, and separates the flue gas or the denitration agent passing through the baffles 111 in different zones. In the vertical direction, the flue gas or the denitration agent will pass through the baffles 111 in different zones in turn and be separated from each other, so that the flue gas and the denitration agent in two adjacent zones do not contact and react, the reaction amount of the flue gas and the denitration agent is controlled, the reaction intensity of the flue gas and the denitration agent is reduced, and the phenomenon that the local temperature of the flue gas is reduced due to the strong chemical reaction and the denitration reaction is insufficient is avoided.

[0039] Specifically, the projection of the reaction cylinder 102 and the center block 103 in the vertical direction is a rectangle arranged from inside to outside; the guide assembly includes four groups of fixed sleeves 110 corresponding to the four vertical surfaces on the center block 103, and each medicine cavity 105 and each smoke cavity 104 spans two adjacent vertical surfaces of the center block 103.

[0040] In the embodiment, the tilt directions of the plurality of sets of fixing sleeves 110 are consistent, and the tilt angle of the set of fixing sleeves 110 corresponding to the medicament 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 moving speed of the denitration agent in the circumferential direction of the reaction cylinder 102 is greater than the speed of the flue gas in the circumferential direction of the reaction cylinder 102, and the denitration agent and the flue gas are mixed more fully after contact.

[0041] In the embodiment, a connecting plate 112 is arranged between two adjacent baffles 111 in the same set of fixing sleeves 110 to prevent the flue gas or the denitration agent from passing between the two baffles 111. The plurality of baffles 111 corresponding to the same set of fixing 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 fixing sleeve 110 decreases from bottom to top. The flow splitting assembly includes a plurality of division frames 113, the plurality of division frames 113 are arranged on the center block 103 from inside to outside, a spacing is arranged between two adjacent division frames 113, each division frame 113 corresponds to one baffle 111 in each set of fixing sleeves 110 and is located above the corresponding baffle 111.

[0042] The baffles 111 of the second part present a stepped shape in the vertical direction, the plurality of division frames 113 divide the plurality of steps into multiple parts, the plurality of division frames 113 have different lengths in the vertical direction to adapt to baffles 111 at different positions, and the distance between each division frame 113 and the corresponding baffle 111 is small. After the flue gas or the denitration agent passes through the corresponding baffle 111 and enters the adjacent medicament chamber 105 or flue gas chamber 104, it will be immediately separated by the division frame 113, thereby completing the partition.

[0043] The connecting plate 112 allows the flue gas or the denitration agent to pass only through the gap between the baffle 111 and the reaction cylinder 102, reduces the contact area of the flue gas and the denitration agent during rotation, and thereby reduces the reaction rate, avoiding the adverse effects of violent reaction. As the flue gas and the denitration agent rise, part of the flue gas and the denitration agent pass through the gap between another position baffle 111 and the reaction cylinder 102 again, mix, and are concentrated together by the corresponding division frame 113. The division frame 113 reduces the influence of the flue gas and the denitration agent in the chemical reaction stage on the surrounding flue gas or denitration agent.

[0044] Specifically, the top end of the reaction cylinder 102 is provided with a fixing frame 126, and each division frame 113 is mounted on the fixing frame 126.

[0045] In the embodiment, each baffle 111 is provided with a rotating shaft 115 near one side of the fixed sleeve 110, the baffle 111 is rotatably connected with the fixed sleeve 110 through the rotating shaft 115, the rotating shaft 115 is coaxial with the fixed sleeve 110, and an elastic member 116 for resetting the baffle 111 is arranged between the rotating shaft 115 and the fixed sleeve 110; each baffle 111 is provided with a through hole 114 capable of connecting the adjacent smoke cavities 104 and the medicine cavities 105, the connecting plate 112 is hingedly connected with one of the baffles 111 adjacent to and above the baffle 111, the hinging axis is parallel to the axis of the rotating shaft 115, the connecting plate 112 is slidably connected with the baffle 111 adjacent to and below the baffle 111, and can slide and pass through the through hole 114 on the corresponding baffle 111 when the baffle 111 rotates; in normal state, the connecting plate 112 is located on the same side of the through holes 114 on the two adjacent baffles 111 in the circumferential direction of the center block 103, and the smoke cavities 104 and the medicine cavities 105 are not connected through the through holes 114; the movement speed of the flue gas in the smoke cavities 104 or the denitration agent in the medicine cavities 105 is increased to enable the baffle 111 to rotate, and the smoke cavities 104 and the medicine cavities 105 are connected through the through holes 114.

[0046] Specifically, the fixed sleeve 110 is connected with the center block 103 through bolts, the end surface of the fixed sleeve 110 is provided with a rotating groove 117 and a containing groove 118, the rotating groove 117 is communicated with the containing groove 118, the rotating shaft 115 is rotatably arranged in the rotating groove 117, the rotating shaft 115 is provided with a top block 128, the top block 128 is slidably arranged in the containing groove 118, and the baffle 111 is abutted with the fixed sleeve 110 after rotating by a certain angle. The elastic member 116 is a spring, the spring is arranged in the containing groove 118 and connected with the fixed sleeve 110 and the baffle 111, and is used for resetting the baffle 111. The upper surface of each baffle 111 is provided with a sliding groove 119, and the sliding groove 119 crosses the through hole 114; each connecting plate 112 is provided with a sliding rod 120, the sliding rod 120 is slidably arranged in the sliding groove 119, and the sliding rod 120 can rotate in the sliding groove 119; each connecting plate 112 is hingedly connected with the baffle 111 above the connecting plate 112 and is slidably connected with the baffle 111 below the connecting plate 112 through the sliding rod 120. In normal state, the baffle 111 is inclined by a certain angle under the action of the elastic member 116, can guide the movement of the flue gas or the denitration agent; the increase of the movement speed of the flue gas or the denitration agent will increase the impact force on the baffle 111, so that the baffle 111 rotates and compresses the elastic member 116, and the rotating baffle 111 will make the connecting plate 112 sliding thereon slide and pass through the through hole 114 to make the through hole 114 connected with the adjacent smoke cavities 104 and medicine cavities 105, so as to make the flue gas and the denitration agent mixed in advance, increase the mixing time, and promote the flue gas and the denitration agent to be more uniformly mixed and more fully reacted.

[0047] In the embodiment, the two adjacent split frames 113 are provided with a plurality of grooves 121 arranged in the vertical direction on one side of the two adjacent split frames 113. The grooves 121 are arranged to change the cross-sectional area of the moving path of the mixed flue gas and the denitration agent after passing through the grooves 121, so that the moving speed of the mixed flue gas and the denitration agent is changed. The mixed flue gas and the denitration agent are further mixed when passing through the grooves 121, thereby improving the mixing effect of the flue gas and the denitration agent.

[0048] In the embodiment, the two grooves 121 on the two adjacent split frames 113 are arranged opposite to each other on the same horizontal plane. The two opposite grooves 121 maximize the difference in the cross-sectional area of the moving path of the mixed flue gas and the denitration agent, thereby further improving the mixing effect of the flue gas and the denitration agent.

[0049] In the embodiment, the center block 103 is provided with a plurality of partition plates 127 corresponding to the number of the medicine cavities 105. The center block 103 is connected to the reaction cylinder 102 through the partition plates 127. The medicine cavity 105 is enclosed by the baffles 111 on the two adjacent groups of fixing sleeves 110, the partition plates 127, the center block 103 and the reaction cylinder 102. The baffles 111 in the first part are provided with a plurality of baffles 111 corresponding to the two groups of fixing sleeves 110 adjacent to the medicine cavity 105 and located below, which are rotatably connected to the partition plates 127. The partition plates 127 and the baffles 111 in the first part can provide a buffer space for the denitration agent entering the medicine cavity 105 and the flue gas entering the smoke cavity 104, and further improve the mixing time of the flue gas and the denitration agent in the reaction cylinder 102 when the through holes 114 connect the adjacent smoke cavities 104 and the medicine cavities 105.

[0050] In the embodiment, the garbage incineration flue gas dry denitration system further comprises a mounting plate 122, a distributor 123 and a feeding module. The mounting plate 122 is arranged between the upper and lower chambers. The reaction modules are provided with a plurality of groups. The reaction cylinder 102 in each reaction module penetrates through the mounting plate 122 and is connected to the mounting plate 122. The partition plate 127 in each reaction module is provided with a nozzle 125. The nozzles 125 in the same group are provided with a branch pipe 124. The feeding module uniformly delivers the denitration agent into each branch pipe 124 through the distributor 123.

[0051] The feeding module comprises a main pipe and a power assembly. The main pipe is connected to the distributor 123. When the denitration agent delivered by the power assembly through the main pipe reaches the distributor 123, the denitration agent is uniformly divided into a plurality of parts corresponding to the number of the branch pipes 124, and is delivered into each branch pipe 124.

[0052] In the embodiment, a pressure sensor is arranged in each branch pipe 124 to detect the real-time pressure in the pipe, and according to the pressure change of the pressure sensor in each pipe, it is determined which branch pipe 124 is blocked, so that timely maintenance can be performed to minimize the influence on the overall denitration effect of the system.

[0053] The working principle of the garbage incineration flue gas dry denitration system provided in the above embodiment is as follows:

[0054] First, the power assembly in the feeding module is started, which conveys the denitration agent from the main pipe to the distributor 123, and then the distributor 123 uniformly distributes the denitration agent to each branch pipe 124. The denitration agent entering the branch pipe 124 is sprayed from the corresponding nozzle 125 into the medicine cavity 105. At the same time, the flue gas enters the smoke cavity 104 through the lower chamber of the furnace 100.

[0055] The denitration agent entering the medicine cavity 105 approaches the corresponding baffle 111 until it contacts and then approaches the adjacent smoke cavity 104 under the guidance of the corresponding baffle 111; similarly, the flue gas entering the smoke cavity 104 approaches the corresponding baffle 111 until it contacts and then approaches the adjacent medicine cavity 105 under the guidance of the corresponding baffle 111, and the flue gas and the denitration agent rotate in the same direction between the center block 103 and the reaction cylinder 102 under the guidance of the corresponding baffle 111. Since the inclination angle of the fixed sleeve 110 in the reaction assembly corresponding to the medicine cavity 105 is greater than the inclination angle of the fixed sleeve 110 in the reaction assembly corresponding to the smoke cavity 104, the denitration agent can enter the smoke cavity 104 from the gap between the baffle 111 and the reaction cylinder 102 during rotation and react with the flue gas. Similarly, the flue gas can enter the medicine cavity 105 and react with the denitration agent, and the mixed flue gas and denitration agent move to one side of the horizontal direction of the partition frame, and the flue gas and denitration agent entering the same side of the partition plate 127 react, and the flow rate changes when passing through the groove 121 on the partition plate 127, and the mixed flue gas and denitration agent can be mixed again. Then, from the top end of the reaction cylinder 102, enter the chamber above the furnace 100, and finally, from the smoke exhaust pipe 101.

[0056] When the moving speed of the flue gas entering the flue chamber 104 increases, the speed of the flue gas entering the medicine chamber 105 increases, and the impact force on the corresponding baffle 111 increases. The baffle 111 is rotated and the elastic member 116 is compressed due to the greater impact. The rotation of the baffle 111 drives the sliding of the connecting plate 112 on the baffle 111 in the sliding groove 119. The sliding of the connecting plate 112 will pass through the through hole 114, so that the through hole 114 is connected with the adjacent flue chamber 104 and medicine chamber 105. The flue gas in the flue chamber 104 and the denitration agent in the medicine chamber 105 will be mixed through the through hole 114. In this way, the residence time of the mixed flue gas and denitration agent in the reaction cylinder 102 is prolonged, and the flue gas and the denitration agent can be fully reacted.

[0057] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described. However, as long as the combinations of the technical features do not contradict each other, they should be considered as the scope of the present disclosure.

[0058] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed. However, it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the present application should be subject to the appended claims.

Claims

1. A waste incineration flue gas dry denitration system, characterized in that, The furnace includes a furnace chamber and a reaction module, the furnace chamber is fixedly arranged, and two chambers are arranged in the furnace chamber in a top-bottom manner; the furnace chamber is provided with a flue gas discharge pipe at the top, flue gas in the furnace chamber enters the upper chamber from the lower chamber, and is then discharged from the flue gas discharge pipe; The reaction module includes a reaction cylinder, a center block, a guide assembly and a flow separation assembly; the reaction cylinder is vertically arranged in the furnace chamber; the center block is arranged in the reaction cylinder; a plurality of smoke chambers are arranged between the reaction cylinder and the center block; the smoke chambers are communicated with the two chambers; the smoke chambers are arranged along the circumferential direction of the reaction cylinder; one reagent chamber is arranged between two adjacent smoke chambers; the denitration agent is introduced into the reagent chamber from the bottom of the reagent chamber; the guide assembly is arranged on the center block and is used for guiding the denitration agent in the reagent chamber and the flue gas in the smoke chamber to rotate at different angles in the circumferential direction of the reaction cylinder and mix; The flow separation assembly is arranged in the reaction cylinder and is used for separating the flue gas and the denitration agent in the vertical direction; The guide assembly includes a plurality of fixed sleeves; each smoke chamber and each reagent chamber correspond to one group of fixed sleeves; each group of fixed sleeves is located between the adjacent smoke chamber and the reagent chamber; the number of each group of fixed sleeves is a plurality; the fixed sleeves are arranged on the peripheral surface of the center block and the axes of the fixed sleeves extend in the horizontal direction; the plurality of fixed sleeves in the same group are arranged along the circumferential direction of the center block and the connecting line between the fixed sleeves has an inclination angle with the horizontal direction; one baffle is arranged on the side of each fixed sleeve close to the reaction cylinder; each baffle is arranged obliquely relative to the horizontal direction; each group of fixed sleeves can guide the flue gas in the corresponding smoke chamber or the denitration agent in the corresponding reagent chamber to move into the adjacent reagent chamber or smoke chamber through the corresponding baffle; The flow separation assembly divides the baffles into different zones in the vertical direction according to the lengths of the baffles, and separates the flue gas or the denitration agent passing through the baffles in different zones; The flow separation assembly includes a plurality of division frames; the plurality of division frames are arranged on the center block from inside to outside; a spacing is arranged between two adjacent division frames; each division frame corresponds to one baffle in each group of fixed sleeves and is located above the corresponding baffle.

2. The system according to claim 1, characterized in that, The inclination directions of the plurality of groups of fixed sleeves are consistent; the inclination angle of the group of fixed sleeves corresponding to the reagent chamber is greater than the inclination angle of the group of fixed sleeves corresponding to the smoke chamber.

3. The system according to claim 1, characterized in that, A connecting plate is arranged between two adjacent baffles in the same group of fixed sleeves and is used for preventing the flue gas or the denitration agent from passing through the two baffles; the plurality of baffles corresponding to the same group of fixed sleeves are divided into a first part and a second part; the baffles in the second part are located above the baffles in the first part; the baffles in the first part are in contact with the reaction cylinder; the lengths of the baffles in the second part in the axial direction of the corresponding fixed sleeve gradually decrease from bottom to top; the flow separation assembly includes a plurality of division frames; the plurality of division frames are arranged on the center block from inside to outside; a spacing is arranged between two adjacent division frames; each division frame corresponds to one baffle in each group of fixed sleeves and is located above the corresponding baffle.

4. The system according to claim 3, characterized in that, Each baffle is provided with a rotating shaft near one side of the fixed sleeve, and the baffle is rotatably connected with the fixed sleeve through the rotating shaft. The rotating shaft is coaxial with the fixed sleeve, and an elastic member for resetting the baffle is arranged between the rotating shaft and the fixed sleeve. Each baffle is provided with a through hole for connecting the adjacent smoke cavity and the medicine cavity. The connecting plate is hingedly connected with the adjacent baffle above, and the hinging axis is parallel to the rotating shaft axis. The connecting plate is slidingly connected with the adjacent baffle below, and can slide and pass through the through hole on the corresponding baffle when the baffle rotates. Under normal circumstances, the through holes on the adjacent two baffles are located on the same side of the center block in the circumferential direction, and the smoke cavity and the medicine cavity are not connected through the through hole. The movement speed of the flue gas in the smoke cavity or the denitration agent in the medicine cavity is increased to rotate the baffle, and the smoke cavity and the medicine cavity are connected through the through hole.

5. The system for dry denitration of waste incineration flue gas according to claim 3, characterized in that, The two adjacent split frames are provided with a plurality of grooves arranged in the vertical direction on one side of the two adjacent split frames.

6. The system for dry denitration of waste incineration flue gas according to claim 5, characterized in that, The two grooves on the two adjacent split frames are oppositely arranged on the same horizontal plane.

7. The system according to claim 3, characterized in that, The center block is provided with a plurality of partition plates corresponding to the number of medicine cavities. The center block is connected with the reaction cylinder through the partition plates. The medicine cavity is enclosed by the baffles on the two adjacent groups of fixed sleeves, the partition plates, the center block and the reaction cylinder. The baffles in the first part are provided with a plurality of baffles. The baffles corresponding to the two groups of fixed sleeves adjacent to the medicine cavities and located below are rotatably connected with the partition plates.

8. The system according to claim 7, characterized in that, The installation plate, the distributor and the feeding module are also included. The installation plate is arranged between the upper and lower chambers. The reaction modules are provided with a plurality of modules and are divided into a plurality of groups. The reaction cylinder in each reaction module penetrates the installation plate and is connected with the installation plate. The partition plate in each reaction module is provided with a nozzle. A branch pipe is arranged on the plurality of nozzles in the same group. The feeding module delivers the denitration agent into each branch pipe through the distributor.

9. The system according to claim 8, characterized in that, A pressure sensor is arranged in each branch pipe to detect the real-time pressure in the pipeline.

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