Gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure

Abstract

The present invention discloses a gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure, which relates to the technical field of wastewater treatment, including a neutralization reaction tank, wherein a plurality of drainage pipes are arranged on one side above the neutralization reaction tank, a flap which is in pre-contact with the discharged fluid is arranged on one side of the water outlet of the drainage pipe, a lime liquid delivery pipe is arranged above the water outlet of the drainage pipe, a plurality of drainage troughs which match the number of drainage pipes are arranged below the lime liquid delivery pipe, an opening and closing piece for opening or blocking the drainage trough is arranged below the lime liquid delivery pipe, the flap is impacted by the impact force during drainage, so that the flap rotates under the action of the impact force, the flap serves as a power transmission structure, and is used to drive the lime liquid discharge port to open and close, so that the wastewater is mixed with the lime liquid before being discharged into the partition tank, the flap not only serves as a power transmission structure, but also serves to disperse the wastewater which is rushed to contact with the flap, so that the wastewater can be more evenly mixed with the lime liquid.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure. Background Art

[0002] Desulfurization wastewater mainly comes from the discharge water of the absorption tower during the wet desulfurization process of boiler flue gas. This wastewater mainly comes from the gypsum dehydration and cleaning system. In order to maintain the balance of substances in the slurry circulation system of the desulfurization and denitrification device, prevent the soluble part of the flue gas, i.e., the chlorine concentration, from exceeding the specified value and ensure the quality of gypsum, a certain amount of wastewater must be discharged from the system. In the initial treatment of wastewater, the wastewater needs to be discharged into the neutralization reaction tank for treatment. The neutralization reaction tank consists of three mutually circulating compartments. When the wastewater fills the first compartment, it automatically flows into the second compartment. Each compartment treats the wastewater differently. When the wastewater is discharged into the first compartment, lime liquid needs to be added to the first compartment to make the lime liquid fully react with the wastewater, increase the pH value of the wastewater from about 5.5 to above 9.0, and make the heavy metals in the wastewater settle in the first compartment.

[0003] In the prior art, wastewater is mixed with the lime liquid in the compartment by adding lime liquid into the compartment. When the first compartment is not full of wastewater, the wastewater has sufficient time to be evenly mixed with the lime liquid in the first compartment. However, when the wastewater in the first compartment is discharged to a full state, the wastewater automatically flows into the second compartment, resulting in the wastewater discharged into the first compartment not being able to evenly contact with the lime liquid and then flowing into the second compartment with the water flow, which affects the quality of wastewater treatment and cannot ensure that the wastewater discharged into the first compartment can be evenly mixed with the lime liquid in equal amounts. Summary of the invention

[0004] The purpose of the present invention is to provide a gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure, which utilizes the impact force during drainage to impact the flap, so that the flap rotates under the action of the impact force. The flap serves as a power transmission structure to drive the lime liquid discharge port to open and close, so that the wastewater is mixed with the lime liquid before being discharged into the partition tank. The flap not only serves as a power transmission structure, but also has the function of breaking up the wastewater that is rushed into contact with the flap, so that the wastewater can be more evenly mixed with the lime liquid.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure, comprising a neutralization reaction tank, a plurality of drainage pipes are arranged on one side above the neutralization reaction tank, a flap that is in pre-contact with the discharged fluid is arranged on one side of the water outlet of the drainage pipe, a lime liquid delivery pipe is arranged above the water outlet of the drainage pipe, a plurality of drainage troughs matching the number of drainage pipes are arranged below the lime liquid delivery pipe, an opening and closing piece for opening or blocking the drainage trough is arranged below the lime liquid delivery pipe, one end of the opening and closing piece is limitedly slidably connected with the flap, and the flap is used to support the opening and closing piece in an initial vertical state, so that the opening and closing piece fits the surface of the lime liquid delivery pipe to block the drainage trough;

[0006] The impact force generated by the contact between the fluid and the flap is used as the power to drive the flap to rotate. The flap rotates and drives the opening and closing member to rotate to open the drainage trough, so that the lime liquid in the drainage trough is mixed with the fluid being discharged.

[0007] Furthermore, a vertically arranged support plate is installed on the inner wall of the neutralization reaction tank, and an open groove matching the size of the flap and used for installing the flap is opened on the support plate, and the upper end of the flap is hinged to the groove wall of the open groove.

[0008] Furthermore, the opening and closing member comprises an arc-shaped plate which is sealed and fitted with the surface of the lime liquid conveying pipe, and one end of the arc-shaped plate is hinged to an extension plate on the surface of the lime liquid conveying pipe.

[0009] Furthermore, one hinged end of the arc-shaped plate is connected to a limiting support rod, one end of the limiting support rod is provided with a sliding block, and a sliding groove for limiting sliding of the sliding block is provided on the flap.

[0010] Furthermore, a guide plate with a bending angle greater than 90° and not exceeding 180° is connected below the lime liquid conveying pipe.

[0011] Furthermore, a panel on one side of the flap facing the drainage pipe is provided with a plurality of triangular liquid storage tanks with openings facing upwards in a rectangular array, and a slot for diversion is provided on the tank wall at the middle position of the opening of the triangular liquid storage tank.

[0012] Furthermore, when the flap is in an initial vertical state, the guide end of the guide plate is arranged in a triangular liquid storage tank located at the top of the flap.

[0013] Furthermore, an L-shaped plate is provided at the bottom end of the support plate facing the drainage pipe, and the flap cooperates with the L-shaped plate to form a water storage tank with an opening facing upward in a vertical state.

[0014] Furthermore, a reset damping mechanism is provided on the support plate, and the reset damping mechanism is used to reduce the speed at which the flap rotates and falls when the flap is reset from an inclined state to a vertical state.

[0015] Furthermore, an adjustment plate for limiting flow and adapted to the shape of the drainage groove is arranged in the drainage groove, and shafts coaxially connected to the hole wall of the drainage groove are installed at both ends of the adjustment plate.

[0016] Technical effects and advantages of the present invention:

[0017] 1. The present invention utilizes the impact force during drainage to impact the flap, so that the flap rotates under the action of the impact force. The flap serves as a power transmission structure to drive the lime liquid discharge port to open and close, so that the wastewater is mixed with the lime liquid before being discharged into the partition tank. The flap not only serves as a power transmission structure, but also serves to break up the wastewater that is rushed into contact with the flap, so that the wastewater can be more evenly mixed with the lime liquid. Before entering the neutralization reaction tank, the wastewater can be fully mixed with the lime liquid. When entering the neutralization reaction tank, heavy metal precipitation is carried out. Without affecting the drainage of the partition tanks in the neutralization reaction tank in sequence, the wastewater can be fully treated in the first layer, thereby improving the quality of wastewater treatment.

[0018] 2. The present invention provides a reset damping mechanism to allow the flap to slowly fall to a vertical state, thereby preventing the flap from suddenly falling and causing rebound, which in turn affects the sealing effect of the drainage trough. The flap can slowly fall, and the opening and closing parts can slowly close the drainage trough, reducing damage to the opening and closing parts caused by sudden falling.

[0019] 3. In the present invention, the amount of wastewater is large enough to impact the rotation angle of the flap, which can drive the arc plate to rotate at a large angle, so that the adjustment plate in the drainage trough rotates around the shaft to a vertical state, and is fully opened at this time, so that the liquid in the drainage trough can be discharged without flow restriction. When the amount of wastewater decreases, the rotation angle of the flap becomes smaller, thereby driving the rotation angle of the arc plate to become smaller. The arc plate squeezes the adjustment plate to make its rotation angle smaller, and partially closes the drainage trough, thereby reducing the discharge of lime liquid. The discharge of lime liquid can be controlled according to the amount of wastewater, so that the amount of wastewater and the amount of lime liquid can be matched with each other, and the lime liquid and wastewater can be evenly mixed while the discharge of lime liquid can be accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A half-section view of the flap structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 A magnified image of point A;

[0023] Figure 4 It is a partial schematic diagram of the flap rotation of the present invention;

[0024] Figure 5 It is a plan view of a half-section of the resetting damping mechanism structure of the present invention;

[0025] Figure 6 It is a three-dimensional diagram of the structure of the reset damping mechanism of the present invention;

[0026] Figure 7 For the present invention Figure 6 The enlarged view of point B;

[0027] Figure 8 It is a schematic diagram of the triangular liquid storage tank structure of the present invention;

[0028] Fig. 9 A half-section view of the triangular liquid storage tank structure of the present invention;

[0029] Fig.10 It is a cross-sectional plan view of the flap structure of the present invention;

[0030] Fig.11 For the present invention Fig.10 Enlarged view of point C;

[0031] Fig.12 It is a cross-sectional plan view of the tilting structure of the flap of the present invention;

[0032] Fig.13 For the present invention Fig.12 The enlarged view of point D;

[0033] Fig.14 It is a flow chart of opening and closing of the adjustment plate and the arc plate of the present invention;

[0034] Fig.15 For the present invention Fig.14 Enlarged view of point E.

[0035] In the figure:

[0036] 1. Neutralization reaction tank; 2. Drainage pipe; 3. Flap; 31. Support plate; 311. Opening groove; 312. L-shaped plate; 32. Triangular liquid storage tank; 321. Notch; 322. Conical hole groove; 3221. Blocking rod; 3222. Blocking plate; 33. Reset damping mechanism; 34. Spring; 35. Limiting plate; 351. Limiting groove; 36. Sliding roller; 4. Lime liquid conveying pipe; 41. Drainage trough; 411. Adjustment plate; 42. Guide plate; 5. Opening and closing piece; 51. Arc plate; 511. Limiting support rod. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In order to better understand the gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure provided in this embodiment, the existing gypsum flue gas desulfurization and denitrification wastewater treatment is briefly introduced below. In order to solve the problems in the background technology, the prior art generally adds an aeration structure in the compartment to make the wastewater in the compartment constantly surge, and while contacting with the lime liquid, the wastewater at the bottom is surged up so that the wastewater at the bottom can flow into the second compartment, or a stirring device is added to the first compartment to stir the wastewater in the first compartment during the wastewater discharge process so that the lime liquid contacts the wastewater. However, although the above two prior arts can make the wastewater and the lime liquid evenly blend, the heavy metals and impurities precipitated in the compartment are stirred by surging the wastewater in the first compartment. All the wastewater will surge up and enter the second compartment or the third compartment with the water flow, which will affect the treatment of the wastewater in the next compartment. The specification aims to solve the above technical problems. The embodiment of the present application provides a gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure. By setting a flap 3, the impact force during drainage is used as the power for opening and closing the lime liquid discharge port, and the wastewater is mixed with the lime liquid before being discharged into the compartment. The flap 3 not only serves as a power transmission structure, but also serves to break up the wastewater that rushes to the flap 3, so that the wastewater can be mixed with the lime liquid more evenly. The wastewater can be fully mixed with the lime liquid before entering the compartment. When entering the compartment, heavy metal precipitation is carried out. Without affecting the drainage of the compartment, the wastewater can be fully treated in the first layer, thereby improving the quality of wastewater treatment.

[0039] Example 1: Reference Figure 1 - Figure 4 , which is the first embodiment of the present invention, provides a gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure, including a neutralization reaction tank 1, a plurality of drainage pipes 2 are arranged on one side above the neutralization reaction tank 1, a flap 3 which is in pre-contact with the discharged fluid is arranged on one side of the water outlet of the drainage pipe 2, a lime liquid delivery pipe 4 is arranged above the water outlet of the drainage pipe 2, a plurality of drainage grooves 41 matching the number of the drainage pipes 2 are arranged below the lime liquid delivery pipe 4, an opening and closing member 5 for opening or blocking the drainage groove 41 is arranged below the lime liquid delivery pipe 4, one end of the opening and closing member 5 is limitedly slidably connected with the flap 3, and the flap 3 is used to support the opening and closing member 5 in the initial vertical state, so that the opening and closing member 5 fits the surface of the lime liquid delivery pipe 4 to block the drainage groove 41;

[0040] The impact force generated by the contact between the fluid and the flap 3 is used as the power to drive the flap 3 to rotate. It should be noted that since the impact force of the fluid is needed as the power, the pump used for wastewater pumping is adaptively adjusted to the discharge end close to the drainage pipe 2 to increase the impact force at the discharge end. When the flap 3 rotates, the opening and closing member 5 is driven to rotate to open the drainage trough 41, so that the lime liquid in the drainage trough 41 is mixed with the fluid being discharged, and the impact force during drainage is used to impact the flap 3, so that the flap 3 rotates under the action of the impact force. The flap 3 serves as a structure of power transmission. The structure is used to drive the lime liquid discharge port to open and close, so that the wastewater is mixed with the lime liquid before being discharged into the partition. The flap 3 not only serves as a power transmission structure, but also serves to break up the wastewater that comes into contact with the flap 3, so that the wastewater can be more evenly mixed with the lime liquid. The wastewater can be fully mixed with the lime liquid before entering the neutralization reaction tank 1. When entering the neutralization reaction tank 1, heavy metal precipitation is carried out. Without affecting the drainage of the partitions in the neutralization reaction tank 1 in sequence, the wastewater can be fully treated in the first layer, thereby improving the quality of wastewater treatment.

[0041] A vertically arranged support plate 31 is installed on the inner wall of the neutralization reaction tank 1, and an open groove 311 matching the size of the flap 3 and used for installing the flap 3 is opened on the support plate 31. The upper end of the flap 3 is hinged to the groove wall of the open groove 311, and the flap 3 rotates around the hinge with the groove wall. The open groove 311 is opened by rotating the flap 3, so that the mixed wastewater can flow into the neutralization reaction tank 1. It should be noted that the number of open grooves 311 and flaps 3 in this scheme is not limited to one. The design of an entire flap 3 can reduce the processing cost. However, considering that the wastewater discharge volume of multiple drainage pipes 2 is not necessarily uniform, the open grooves 311 and flaps 3 can be increased to the same number as the drainage pipes 2. Each corresponding open groove 311 and flap 3 are used to individually control the opening and closing of the drainage groove 41 above the corresponding drainage pipe 2, and can be precisely controlled according to the discharge volume.

[0042] The opening and closing member 5 includes an arc plate 51 which is sealed and fitted with the surface of the lime liquid conveying pipe 4, and one end of the arc plate 51 is hinged on an extension plate on the surface of the lime liquid conveying pipe 4, one hinged end of the arc plate 51 is connected to a limited support rod 511, one end of the limited support rod 511 is provided with a slider, and a slide groove for limiting the sliding of the slider is provided on the flap 3, and a guide plate 42 with a bending angle greater than 90° and not more than 180° is connected below the lime liquid conveying pipe 4, and the bending angle of the guide plate 42 is convenient for guiding the lime liquid without affecting the rotation of the arc plate 51. When the flap 3 rotates, the slider at one end of the limited support rod 511 slides in the slide groove, pulling the limited support rod 511 and the arc plate 51 to rotate around the hinged end of the arc plate 51, so that the arc plate 51 is not in contact with the surface of the lime liquid conveying pipe 4, the drainage groove 41 is opened, the lime liquid flows out, and the liquid is guided by the guide plate 42 to mix with the discharged liquid.

[0043] Example 2: Reference Figure 5 - Figure 7 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment. During the implementation of the first embodiment, it is found that when the wastewater flow rate becomes smaller and its impact force is less than the gravity of the flap 3 itself, the flap 3 will automatically fall down. The sudden fall drives the arc plate 51 to rotate rapidly and contact the surface of the lime liquid delivery pipe 4. However, the rapid rotation will cause the arc plate 51 to collide with the surface of the lime liquid delivery pipe 4 with a certain force, which is easy to damage the hinge of the arc plate 51. Secondly, the flap 3 is easy to rebound after suddenly falling, resulting in an unstable vertical state of the flap 3, affecting the closed state of the drainage trough 41.

[0044] In order to solve the above problem, this embodiment sets a reset damping mechanism 33 to make the flap 3 fall slowly to a vertical state, prevent the flap 3 from falling suddenly and causing rebound, and then affect the closing effect of the drainage groove 41, so that the flap 3 can fall slowly, and the opening and closing member 5 can slowly close the drainage groove 41, reducing the damage to the opening and closing member 5 caused by sudden falling.

[0045] The support plate 31 is provided with a reset damping mechanism 33, and the reset damping mechanism 33 is used to reduce the speed of the flap 3 rotating and falling when the flap 3 is reset to the vertical state from the inclined state. The damping mechanism 33 includes a damping block arranged on the support plate 31, and two cavities arranged up and down for storing liquid are opened in the damping block, and the upper cavity is communicated with the outside through a hole groove, and the upper cavity and the lower cavity are communicated with each other through a slot hole. A pressure rod is installed through one side of the lower cavity, and pressure blocks are arranged at both ends of the flap 3 for movably pressing against one end of the pressure rod. When the flap 3 rotates and falls, the pressure blocks at both ends of the flap 3 first contact the pressure rod, and squeeze the pressure rod under the pressure of the flap 3's own weight, and the liquid in the lower cavity is squeezed into the upper cavity from the slot hole. Since the flow rate of the liquid slows down when passing through the slot hole, damping is formed, so that the flap 3 slowly falls to the vertical state, preventing the flap 3 from suddenly falling and causing rebound, thereby affecting the sealing effect of the drainage groove 41;

[0046] The reset damping mechanism 33 can also be a structure composed of a spring 34, a limit plate 35 and a sliding roller 36, and the above structure is provided with two, the limit plate 35 is fixed on the support plates 31 on both sides of the flap 3, a limit groove 351 is provided in the limit plate 35, and a section of the limit groove 351 is an arc shape adapted to the rotation trajectory of the flap 3, one end of the sliding roller 36 is arranged in the limit groove 351, and the other end of the sliding roller 36 is connected to the flap 3 through the mounting block, and the limit plate 35 is provided at one end away from the support plate 31 An extension plate is provided, and the extension plate and the mounting block are connected by a spring 34. When the flap 3 falls to a vertical state, the spring 34 is stretched to the maximum, and while the flap 3 falls, the spring 34 pulls the flap 3, so that the flap 3 can fall slowly, and the opening and closing member 5 can slowly close the drainage groove 41, reducing damage to the opening and closing member 5 caused by a sudden fall, and the spring 34 provides a pulling force, which can reduce the influence of the flap 3's own weight on the water flow impact when wastewater impacts the flap 3, thereby improving the convenience of rotating the flap 3.

[0047] Example 3: Reference Figure 8 - Fig.13 , which is the third embodiment of the present invention. This embodiment is different from the first embodiment. During the implementation of the first embodiment, it was found that when the wastewater first hits the flap 3, it takes a certain amount of time for the liquid falling from the drainage trough 41 to flow into and mix with the wastewater. However, in the process of diverting the lime liquid, part of the wastewater is discharged and cannot be mixed with the lime liquid. When the wastewater is discharged at intervals, the initial part of the wastewater discharged each time cannot be mixed with the lime liquid, affecting the treatment effect.

[0048] In order to solve the above problem, this embodiment provides a triangular liquid storage tank 32 capable of storing liquid on the surface of the flap 3. When the flap 3 is rotating and falling, the drainage tank 41 is still discharging liquid, and the excess liquid is transported to the triangular liquid storage tank 32 through the guide plate 42 for storage. When the wastewater is discharged next time, the wastewater can be directly mixed with the lime liquid stored in the triangular liquid storage tank 32, avoiding the initial sewage from being mixed with the lime every time the wastewater is discharged, thereby improving the mixing uniformity.

[0049] A plurality of triangular liquid storage tanks 32 with openings facing upward and in a rectangular array are provided on a panel on one side of the flap 3 facing the drainage pipe 2. A notch 321 for diversion is provided on the groove wall at the middle position of the opening of the triangular liquid storage tank 32. The outer wall of the triangular liquid storage tank 32 on one side facing the drainage pipe 2 is concave inwardly and has an inclined shape, so that when the limestone liquid flows out of the diversion notch 321, it can flow into the next triangular liquid storage tank 32. When the flap 3 is in the initial vertical state, the diversion end of the guide plate 42 is arranged in the triangular liquid storage tank 32 at the top of the flap 3, and the two ends of the triangular liquid storage tank 32 are connected to each other. The conical hole groove 322 is provided with a blocking rod 3221 inserted in the conical hole groove 322, and a plurality of blocking plates 3222 are sleeved on the blocking rod 3221. The bottom end of the blocking rod 3221 is an inclined surface, and one side of the bottom end of the support plate 31 is an inclined surface that fits the inclined surface of the bottom end of the blocking rod 3221. The triangular liquid storage tank 32 at the bottom end of the flap 3 is communicated with the outside. When the flap 3 is in a vertical state, the bottom end opening of the triangular liquid storage tank 32 at the bottom layer is blocked by the support plate 31, and the blocking rod 3221 moves upward under the pressure of the bottom end of the support plate 31, so that the blocking plate 3222 closes the conical hole groove 322. When the flap 3 is inclined The blocking rod 3221 moves downward under the action of gravity, so that the conical hole groove 322 is opened to discharge the waste water inside. When the flap 3 is vertical, the conical hole groove 322 is closed, and the waste water in the triangular liquid storage tank 32 has been discharged, which is convenient for the storage of lime liquid later. An L-shaped plate 312 is arranged at the bottom end of the support plate 31 facing the drainage pipe 2. Both ends of the L-shaped plate 312 are blocked by the inner wall of the neutralization reaction tank 1. The flap 3 acts as the side wall of the L-shaped plate 312 in the vertical state, and cooperates with the L-shaped plate 312 to form a water storage tank with an opening facing upward. When the guide plate 42 is close to the triangular liquid storage tank 32 , the liquid guided by the guide plate 42 can be poured into the triangular liquid storage tank 32. When the liquid in the uppermost triangular liquid storage tank 32 is higher than the slot 321, it can automatically flow into the lower triangular liquid storage tank 32 through the slot 321, and repeat in sequence. When the wastewater discharge end has little wastewater flow and does not contact the flap 3, the wastewater flows into the water storage tank. When the wastewater in the water storage tank accumulates to a certain amount and its pressure on the flap 3 is greater than its own gravity, the flap 3 rotates to open the side end of the L-shaped plate 312, and the accumulated wastewater can be mixed with the lime liquid in the lower triangular liquid storage tank 32 of the flap 3.

[0050] The guide plate 42 can also be a soft plate that moves with the flap 3, and the guide end of the guide plate 42 is always set in the uppermost triangular liquid storage tank 32. During the wastewater discharge process, the lime liquid can be diverted to the flap 3. When the wastewater collides with the flap 3, it mixes with the lime liquid. When the flap 3 falls back, it does not affect the guide plate 42 from diverting the lime liquid.

[0051] Example 4: Reference Fig.14 - Fig.15, which is the fourth embodiment of the present invention. This embodiment is different from the first embodiment in that an adjustment plate 411 for limiting flow and matching the shape of the drainage trough 41 is provided in the drainage trough 41, and shafts coaxially connected to the hole wall of the drainage trough 41 are installed at both ends of the adjustment plate 411. The shaft is installed on one side of the adjustment plate 411 close to the hinged end of the arc plate 51, and the axis of the shaft is parallel to the axis of the lime liquid conveying pipe 4 in the same direction. The adjustment plate 411 can rotate around the shaft in the drainage trough 41. The angle of rotation of the arc plate 51 around the hinged end is used to adjust the inclination angle of the adjustment plate 411, and then adjust the flow rate of liquid discharged from the drainage trough 41. The flow rate of wastewater flowing through the flap 3 is used to regulate the rotation of the flap 3 When the amount of wastewater is large enough to impact the rotation angle of the flap 3, the arc plate 51 can be driven to rotate at a large angle, so that the adjustment plate 411 in the drainage trough 41 rotates around the shaft to a vertical state, and is fully opened at this time, so that the liquid in the drainage trough 41 can be discharged without flow restriction. When the amount of wastewater decreases, the rotation angle of the flap 3 becomes smaller, thereby driving the rotation angle of the arc plate 51 to become smaller. The arc plate 51 squeezes the adjustment plate 411 to make its rotation angle smaller, and partially closes the drainage trough 41, thereby reducing the discharge of lime liquid. The discharge of lime liquid can be controlled according to the amount of wastewater, so that the amount of wastewater and the amount of lime liquid can match each other, and the discharge of lime liquid can be accurately controlled while the lime liquid and wastewater are evenly mixed.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure, comprising a neutralization reaction tank (1), wherein a plurality of drainage pipes (2) are arranged on one side above the neutralization reaction tank (1), characterized in that: A flap (3) that is in pre-contact with the discharged fluid is provided on one side of the water outlet of the drainage pipe (2); a lime liquid delivery pipe (4) is provided above the water outlet of the drainage pipe (2); a plurality of drainage grooves (41) matching the number of the drainage pipe (2) are provided below the lime liquid delivery pipe (4); an opening and closing member (5) for opening or closing the drainage grooves (41) is provided below the lime liquid delivery pipe (4); one end of the opening and closing member (5) is connected to the flap (3) in a limited sliding manner; the flap (3) is used to support the opening and closing member (5) in an initial vertical state so that the opening and closing member (5) and the surface of the lime liquid delivery pipe (4) are in contact with each other to close the drainage grooves (41); The impact force generated by the contact between the fluid and the flap (3) serves as a driving force for driving the flap (3) to rotate. The flap (3) simultaneously drives the opening and closing member (5) to rotate to open the drainage groove (41), so that the lime liquid in the drainage groove (41) is mixed with the fluid being discharged; A plurality of triangular liquid storage grooves (32) with openings facing upwards and arranged in a rectangular array are provided on a side panel of the flap (3) facing the drainage pipe (2); a notch (321) for flow diversion is provided on the groove wall at the middle position of the opening of the triangular liquid storage groove (32); When the flap (3) is in an initial vertical state, the guide end of the guide plate (42) is arranged in a triangular liquid storage tank (32) located at the top of the flap (3).

2. The gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure according to claim 1 is characterized in that: The inner wall of the neutralization reaction tank (1) is provided with a vertically arranged support plate (31), the support plate (31) is provided with an open groove (311) matching the size of the flap (3) and used for installing the flap (3), and the upper end of the flap (3) is hinged to the groove wall of the open groove (311).

3. The gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure according to claim 2 is characterized in that: The opening and closing member (5) comprises an arc-shaped plate (51) which is sealed against the surface of the lime liquid conveying pipe (4), and one end of the arc-shaped plate (51) is hinged to an extension plate on the surface of the lime liquid conveying pipe (4).

4. The gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure according to claim 3 is characterized in that: One hinged end of the arc-shaped plate (51) is connected to a limit support rod (511), one end of the limit support rod (511) is provided with a sliding block, and a sliding groove for the sliding block to slide in a limit position is provided on the flap (3).

5. The gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure according to claim 4 is characterized in that: A guide plate (42) having a bending angle greater than 90° and not exceeding 180° is connected below the lime liquid conveying pipe (4).

6. The gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure according to claim 5 is characterized in that: An L-shaped plate (312) is provided at the bottom end of the support plate (31) on the side facing the drainage pipe (2); the flap (3) cooperates with the L-shaped plate (312) in a vertical state to form a water storage tank with an opening facing upward.

7. The gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure according to claim 6 is characterized in that: The support plate (31) is provided with a reset damping mechanism (33), and the reset damping mechanism (33) is used to reduce the speed at which the flap (3) rotates and falls when the flap (3) is reset from an inclined state to a vertical state.

8. The gypsum flue gas desulfurization and denitrification wastewater discharge treatment structure according to claim 7 is characterized in that: An adjustment plate (411) for limiting flow and matching the shape of the drainage groove (41) is arranged in the drainage groove (41), and shafts coaxially connected to the hole wall of the drainage groove (41) are installed at both ends of the adjustment plate (411).

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