Flue gas desulfurization and denitrification equipment and use method thereof

Abstract

The present invention belongs to the technical field of flue gas purification, and relates to a flue gas desulfurization and denitrification equipment and a method for using the same, including: the exhaust end of chimney one is connected with the inlet end of chimney two, and a dry desulfurization and denitrification system and a wet desulfurization and denitrification system are respectively arranged in chimney one and chimney two; a smoke delivery sleeve is connected between the exhaust end of chimney one and the inlet end of chimney two, and a through hole is opened on the smoke delivery sleeve, and chimney one is connected with chimney two through the through hole on the smoke delivery sleeve; the through hole on the smoke delivery sleeve is smaller than the first end of the drain pipe and the through hole on the smoke delivery sleeve is surrounded by the pipe mouth of the first end of the drain pipe in the vertical direction. Dry desulfurization and denitrification and wet desulfurization and denitrification are integrated in the same tower body composed of cylinder body one and cylinder body two, and the structure is compact, which reduces the floor space, operation cost and management complexity of the equipment, and chimney one and the drain pipe collect solid byproducts and liquid byproducts respectively, which is convenient for subsequent separate treatment.

Description

Technical Field

[0001] The present invention belongs to the technical field of flue gas purification, and in particular, relates to a flue gas desulfurization and denitrification device and a use method thereof. Background Art

[0002] Flue gas desulfurization and denitrification are important links in the environmental protection treatment of exhaust gases in industrial production. The main reason is that flue gas containing sulfur and nitrogen oxides has significant harm to the environment and human health. Therefore, it is necessary to desulfurize and denitrify the flue gas to be discharged.

[0003] In the existing equipment for desulfurization and denitrification of flue gas, a plurality of interconnected tower bodies are usually used to perform desulfurization and denitrification of flue gas respectively, so that the flue gas flows through the plurality of tower bodies in sequence. Due to the friction and local resistance, the energy of the flue gas circulation will be lost, and if it is necessary to realize the process of dry and wet coordinated treatment, a plurality of tower bodies will be added. This will further increase the floor space of the equipment which already occupies a large area, and at the same time increase the operating cost.

[0004] In view of the shortcomings of the above-mentioned prior art, a flue gas desulfurization and denitrification equipment and a method of using the same tower body have been designed to overcome the shortcomings of the prior art and to carry out dry desulfurization and denitrification and wet desulfurization and denitrification in the same tower body, and to collect solid by-products and liquid by-products respectively, so as to facilitate subsequent separate treatment, recovery or safe disposal. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide a flue gas desulfurization and denitrification equipment and a method of using the equipment, which can perform dry desulfurization and denitrification and wet desulfurization and denitrification in the same tower body, and can collect solid by-products and liquid by-products respectively, so as to facilitate subsequent separate treatment, recovery or safe disposal.

[0006] In order to solve the above technical problems, the present invention provides a flue gas desulfurization and denitrification equipment, including chimney one, chimney two, a dry desulfurization and denitrification system, a wet desulfurization and denitrification system, a flue gas inlet pipe, a material discharge valve, a flue gas discharge pipe, a drain pipe and a smoke delivery sleeve, the smoke exhaust end of chimney one is connected with the smoke inlet end of chimney two, and the dry desulfurization and denitrification system for dry desulfurization and denitrification of flue gas and the wet desulfurization and denitrification system for wet desulfurization and denitrification of flue gas are respectively provided in chimney one and chimney two. The lower part of chimney one is connected with a flue gas inlet pipe and a material discharge valve located below the flue gas inlet pipe. The flue gas inlet pipe is eccentric to chimney one so as to introduce the flue gas tangentially into chimney one. The material discharge valve is used to discharge the solid by-products generated during the dry desulfurization and denitrification in chimney one. The upper part of chimney two is connected with a flue gas discharge pipe. Chimney one is concentric with chimney two and chimney two is located above chimney one. Chimney one is provided with a material discharge valve for receiving the liquid by-products discharged during the wet desulfurization and denitrification in chimney two. A discharge pipe for by-products, a valve built into the discharge pipe, and the discharge of liquid by-products in the discharge pipe is controlled by opening and closing the valve. The first end of the discharge pipe is conical, and the first end of the discharge pipe is located at the exhaust end of chimney one, and a predetermined distance for smoke to pass is left between the first end of the discharge pipe and the inner side wall of the exhaust end of chimney one, and the second end of the discharge pipe extends downward to be connected to the outside of the chimney, and the valve in the discharge pipe is located at the second end of the discharge pipe; a smoke delivery sleeve is connected between the exhaust end of chimney one and the smoke inlet end of chimney two, and the smoke delivery sleeve A through hole is opened on the sleeve, and chimney one is connected with chimney two through the through hole on the smoke delivery sleeve. The two ends of the through hole on the smoke delivery sleeve are different in size. The small end of the through hole is connected to chimney one, and the large end of the through hole is connected to chimney two; the small end of the through hole on the smoke delivery sleeve is smaller than the first end of the drainage pipe and the small end of the through hole on the smoke delivery sleeve is surrounded by the pipe opening of the first end of the drainage pipe in the vertical direction; the through hole on the smoke delivery sleeve is smaller than the first end of the drainage pipe and the through hole on the smoke delivery sleeve is surrounded by the pipe opening of the first end of the drainage pipe in the vertical direction.

[0007] Preferably, the dry desulfurization and denitrification system includes an ammonia spray pipe, a lime powder spray gun, a catalytic filling layer and an atomizing nozzle. The chimney is provided with an ammonia spray pipe located below the flue gas inlet pipe, a lime powder spray gun located above the flue gas inlet pipe and a catalytic filling layer located above the lime powder spray gun. The spraying direction of the ammonia spray pipe is upward; an atomizing nozzle suitable for spraying an oxidant is provided in the flue gas inlet pipe, the oxidant sprayed by the atomizing nozzle is a hydrogen peroxide solution, and the spraying direction of the atomizing nozzle is toward the direction of the flue gas input into the flue gas inlet pipe.

[0008] Preferably, it also includes a catalyst dripper, a rotating sleeve, a connecting rod, a bevel gear one, a rotating shaft, a bevel gear two and a motor. The catalytic layer one is slidably arranged on the chimney one, and the catalytic layer one is a fiber filter layer impregnated with a catalyst; a catalyst dripper located above the catalytic layer one is provided on the upper left side of the chimney one, a rotating sleeve is rotatably provided on the drain pipe, a connecting rod connected to the catalytic layer one is provided on the rotating sleeve, a bevel gear one is connected to the rotating sleeve, a rotating shaft is rotatably provided on the upper right side of the chimney one, and a bevel gear two meshing with the bevel gear one is connected to the end of the rotating shaft, the rotating shaft is driven to rotate by a motor, the motor is installed to the right side of the middle part of the chimney one, and the output shaft of the motor and the rotating shaft are driven by a flat belt.

[0009] Preferably, it also includes a mounting plate and a wedge block, the connecting rod is slidably arranged on the rotating sleeve, the catalytic filling layer 1 and the chimney 1 are slidably matched, and a tension spring surrounding the connecting rod is connected between the catalytic filling layer 1 and the rotating sleeve; the drain pipe is connected to the mounting plate, the lower side of the mounting plate is connected to the wedge block, the upper end of the connecting rod is in contact with the wedge block, and a roller is rotatably provided on the upper end of the connecting rod, and the roller replaces the connecting rod in contact with the wedge block.

[0010] Preferably, it also includes a guide rail, a slider and a scraper plate. A guide rail is provided on the upper right inner side of the chimney, a slider is slidably provided on the guide rail, a compression spring located inside the guide rail is connected between the slider and the guide rail; the slider is connected to a scraper plate that contacts and cooperates with the lower side of the catalytic filling layer.

[0011] Preferably, a connecting rod is also included, and the material discharge valve includes a material discharge frame connected to the lower part of the smoke pipe and a material discharge plate slidably arranged on the material discharge frame; a connecting rod for transmitting power is connected between the slider and the material discharge plate.

[0012] Preferably, the wet desulfurization and denitrification system includes a limestone slurry spray pipe, an ammonia water spray pipe, a guide plate and a catalytic filling layer 2. The chimney 2 is provided with a limestone slurry spray pipe, an ammonia water spray pipe located above the limestone slurry spray pipe, a plurality of guide plates stacked between the ammonia water spray pipe and the limestone slurry spray pipe, and a catalytic filling layer 2 located between the ammonia water spray pipe and the flue gas exhaust pipe; the inner side wall of the chimney 2 and the plurality of guide plates together form a C-shaped guide channel, which increases the flow path of the flue gas and improves the mixing time of the ammonia water and the flue gas.

[0013] Preferably, the wet flue gas desulfurization and denitrification system also includes a partition and a spacer ring. A partition is provided on the drain pipe, which divides the interior of the drain pipe into a first chamber and a second chamber that are opposite to each other and not connected to each other. The partition is sealed with the through hole of the smoke delivery sleeve, chimney one and chimney two. The partition divides the through hole of the smoke delivery sleeve into two through holes that are opposite to each other and not connected to each other. The two through holes on the smoke delivery sleeve correspond to the first chamber and the second chamber on the drain pipe respectively. A spacer ring that seals with the partition is connected between the second chamber and the corresponding through hole. The spraying direction of the limestone slurry spray pipe is toward the first chamber, and the lower opening of the guide channel is toward the second chamber. A flow channel for the flue gas after wet desulfurization to pass through is left between the partition and the lowest guide plate.

[0014] Preferably, the wet desulfurization and denitrification system also includes a guide plate and a blower. An inclined guide plate is connected to the partition ring, and the upper part of the guide plate is inclined toward the direction close to the first cavity; the upper end of the partition is bent toward the lower opening of the guide channel, and a blower is installed on the lower side of the bend at the upper end of the partition.

[0015] The present invention also provides a method for using the flue gas desulfurization and denitrification equipment according to any one of the above, characterized in that it comprises:

[0016] The flue gas enters the chimney 1 through the flue gas inlet pipe, and is preliminarily subjected to dry desulfurization and denitrification by the dry desulfurization and denitrification system, and the solid by-products generated during the dry desulfurization and denitrification in the chimney 1 are discharged through the material discharge valve;

[0017] Then the flue gas rises into chimney two, and then undergoes wet desulfurization and denitrification through a wet desulfurization and denitrification system. The liquid by-products produced by the wet desulfurization and denitrification in chimney two will pass through the smoke delivery sleeve into the drain pipe for discharge, wherein the through hole on the smoke delivery sleeve is smaller than the first end of the drain pipe and the through hole on the smoke delivery sleeve is surrounded by the pipe opening at the first end of the drain pipe in the vertical direction.

[0018] Finally, the flue gas treated with dry desulfurization and denitrification and wet desulfurization and denitrification is discharged through the flue gas discharge pipe (22).

[0019] The present invention overcomes the shortcomings of the prior art and can achieve the following beneficial effects:

[0020] 1. Dry desulfurization and denitrification and wet desulfurization and denitrification are integrated in the same tower body composed of cylinder body 1 and cylinder body 2. The structure is compact, which reduces the equipment footprint, operating costs and management complexity. In addition, chimney 1 and drain pipe collect solid by-products and liquid by-products respectively, which is convenient for subsequent separate treatment.

[0021] 2. By rotating the catalytic filler, the catalyst dropper can evenly drip the catalyst into the catalytic filler, and the catalytic filler can evenly catalytically treat the flue gas in the chimney, avoiding the uneven flue gas treatment caused by the fixed position of the flue gas inlet pipe.

[0022] 3. The catalytic packing can also shake up and down when rotating to shake off the attached solid by-products; and the scraper plate will shake up and down synchronously to continuously scrape the material; at the same time, the unloading plate will automatically and synchronously unload the material up and down intermittently. Each step is interrelated and coordinated with each other, and has a high degree of synchronization.

[0023] 4. The gypsum slurry produced by limestone slurry desulfurization will fall into the first chamber of the drain pipe, and the residual liquid from ammonia denitrification will fall into the second chamber of the drain pipe, so as to collect different liquid by-products produced by wet desulfurization and wet denitrification respectively, which is convenient for subsequent treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an assembly schematic diagram of the present invention.

[0025] Figure 2 For the present invention Figure 1 AA direction section view in.

[0026] Figure 3 It is a cross-sectional view of chimney 1 and chimney 2 of the present invention.

[0027] Figure 4 It is a cross-sectional view of the smoke delivery sleeve of the present invention, which also includes a part of the smoke tube and a part of the liquid discharge pipe.

[0028] Figure 5 It is a schematic diagram of the interior of a chimney of the present invention.

[0029] Figure 6 It is a schematic diagram of the rotating sleeve, connecting rod and roller of the present invention.

[0030] Figure 7 It is a left side view of the slider, scraper plate and connecting rod of the present invention.

[0031] Figure 8 It is the internal schematic diagram of the chimney 2 of the present invention.

[0032] Fig. 9 It is a schematic diagram of the positional relationship between the spacer ring and the guide plate of the present invention.

[0033] The markings in the accompanying drawings provided by the present invention are: 1- chimney 1, 11- dry desulfurization and denitrification system, 111- ammonia spray pipe, 112- lime powder spray gun, 113- catalytic packing layer 1, 12- flue gas input pipe, 13- material discharge valve, 131- unloading frame, 132- unloading plate, 14- atomizing nozzle, 2- chimney 2, 21- wet desulfurization and denitrification system, 211- limestone slurry spray pipe, 212- guide plate, 2121- guide channel, 213- ammonia spray pipe, 214- Catalytic filling layer two, 22-smoke exhaust pipe, 31-drain pipe, 311-first chamber, 312-second chamber, 32-smoke delivery sleeve, 40-catalyst drip tube, 41-rotating sleeve, 42-connecting rod, 422-roller, 43-mounting plate, 44-wedge block, 45-bevel gear one, 46-rotating shaft, 47-bevel gear two, 48-motor, 51-guide rail, 52-slider, 53-scraper plate, 54-connecting rod, 61-partition plate, 62-partition ring, 63-guide plate, 64-blower. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. It should be noted that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] A flue gas desulfurization and denitrification device, such as Figure 1-Figure 4As shown, it includes a chimney 1, a chimney 2, a dry desulfurization and denitrification system 11, a wet desulfurization and denitrification system 21, a flue gas inlet pipe 12, a material discharge valve 13, a flue gas discharge pipe 22, a drain pipe 31 and a smoke delivery sleeve 32. The smoke exhaust end of the chimney 1 is connected with the smoke inlet end of the chimney 2. The chimney 1 and the chimney 2 are respectively provided with a dry desulfurization and denitrification system 11 for performing dry desulfurization and denitrification on the flue gas and a wet desulfurization and denitrification system 21 for performing wet desulfurization and denitrification on the flue gas; the lower part of the chimney 1 is connected with the flue gas inlet pipe 12 and the material discharge valve 13 located below the flue gas inlet pipe 12. The flue gas inlet pipe 12 is connected with the material discharge valve 13 located below the flue gas inlet pipe 12. The eccentric part toward chimney 1 is suitable for introducing the flue gas tangentially into chimney 1. The material discharge valve 13 is used to discharge the solid by-products produced during the dry desulfurization and denitrification in chimney 1. The flue gas to be desulfurized and denitrified enters chimney 1 through the flue gas inlet pipe 12 for dry desulfurization and denitrification, and then enters chimney 2 2 for wet desulfurization and denitrification. The upper part of chimney 2 2 is connected with a flue gas discharge pipe 22, and the finished flue gas in chimney 2 2 is discharged from the flue gas discharge pipe 22; chimney 1 is concentric with chimney 2 2 and chimney 2 2 is located above chimney 1. Chimney 1 is provided with a gas outlet 22 for receiving the flue gas discharged during the wet desulfurization and denitrification in chimney 2 2. The drain pipe 31 of the liquid by-product has a built-in valve, and the discharge of the liquid by-product in the drain pipe 31 is controlled by opening and closing the valve. The first end of the drain pipe 31 is conical, and the first end of the drain pipe 31 is located at the exhaust end of the chimney 1, and a predetermined distance for smoke to pass through is left between the first end of the drain pipe 31 and the inner side wall of the exhaust end of the chimney 1, and the second end of the drain pipe 31 extends downward to be connected to the outside of the chimney, and the valve in the drain pipe 31 is located at the second end of the drain pipe 31; a smoke delivery sleeve 32 is connected between the exhaust end of the chimney 1 and the smoke inlet end of the chimney 2, and a through hole is opened on the smoke delivery sleeve 32, and the chimney 1 passes through the smoke delivery sleeve 32. The through hole on the through hole is connected with the chimney 2 2, and the flue gas in the chimney 1 that has undergone dry desulfurization and denitrification enters the chimney 2 2 through the smoke delivery sleeve 32 for wet desulfurization and denitrification. The two ends of the through hole on the smoke delivery sleeve 32 are different in size. The small end of the through hole is connected to the chimney 1, and the large end of the through hole is connected to the chimney 2 2; the small end of the through hole on the smoke delivery sleeve 32 is smaller than the first end of the drain pipe 31, and the small end of the through hole on the smoke delivery sleeve 32 is surrounded by the pipe opening of the first end of the drain pipe 31 in the vertical direction, so as to facilitate the liquid by-products to gather and fall into the drain pipe 31, and further prevent the liquid by-products from falling into the chimney 1 and mixing with the solid by-products;The through hole on the smoke delivery sleeve 32 is smaller than the first end of the drain pipe 31 and is surrounded by the pipe opening of the first end of the drain pipe 31 in the vertical direction. The liquid by-products generated when the wet desulfurization and denitrification system 21 in the chimney 2 performs wet desulfurization and denitrification on the flue gas will fall into the drain pipe 31 through the smoke delivery sleeve 32, and the valve in the drain pipe 31 can be opened and closed to discharge the liquid by-products in the drain pipe 31, so that dry desulfurization and denitrification and wet desulfurization can be integrated in the same tower body composed of the cylinder body 1 and the cylinder body 2. Denitrification has a compact structure, which reduces the equipment footprint, operating costs and management complexity. It can also avoid the mixing of liquid byproducts produced by wet desulfurization and denitrification with solid byproducts produced by dry desulfurization and denitrification, so as to collect solid byproducts and liquid byproducts separately, which is convenient for subsequent separate treatment, recycling or safe disposal. In addition, pre-dry desulfurization and denitrification can also quickly capture and react to pollutants such as Sox and NOx in flue gas under high temperature conditions, reducing water consumption and treatment burden in subsequent wet desulfurization and denitrification. ;

[0037] like Figure 2 , Figure 3 and Figure 5 As shown, the dry desulfurization and denitrification system 11 includes an ammonia spray pipe 111, a lime powder spray gun 112, a catalytic packing 113 and an atomizing nozzle 14. The chimney 1 is provided with an ammonia spray pipe 111 located below the flue gas input pipe 12, a lime powder spray gun 112 located above the flue gas input pipe 12 and a catalytic packing 113 located above the lime powder spray gun 112. The spraying direction of the ammonia spray pipe 111 is upward; an atomizing nozzle 14 suitable for spraying an oxidant is provided in the flue gas input pipe 12. The oxidant sprayed by the atomizing nozzle 14 is a hydrogen peroxide solution. The spraying direction of the atomizing nozzle 14 is toward the direction of the flue gas input pipe 12. The atomized hydrogen peroxide solution is sprayed by the atomizing nozzle 14 to pre-desulfurize and denitrify the flue gas in the flue gas input pipe 12. The oxidation treatment can not only effectively oxidize SO2 and NOx in the flue gas, but also atomize and humidify the flue gas, capture solid particulate matter in the flue gas, and make the lime powder sprayed by the lime powder spray gun 112 fully mix and react with the SO2 in the flue gas to generate solid particulate calcium sulfate. When the ammonia sprayed by the ammonia spray pipe 111 mixes with the NOx in the flue gas and passes through the catalytic filling layer 113, the NOx will be catalytically reduced to harmless nitrogen and water. At the same time, the catalytic filling layer 113 will intercept the solid by-products in the flue gas. With the atomization and humidification of the hydrogen peroxide solution and the addition of the generated water, the solid by-products will gradually mix and fall to the bottom of the chimney, and finally be discharged through the material discharge valve 13, and the flue gas passing through the catalytic filling layer will continue to flow into the chimney 2 2.

[0038] like Figure 3 , Figure 5 Figure 6As shown, it also includes a catalyst dripper 40, a rotating sleeve 41, a connecting rod 42, a bevel gear 45, a rotating shaft 46, a bevel gear 47 and a motor 48. The catalytic layer 113 is slidably arranged on the chimney 1, and the catalytic layer 113 is a fiber filter layer impregnated with a catalyst; a catalyst dripper 40 is arranged on the upper left side of the chimney 1 and is located above the catalytic layer 113. The catalyst dripper 40 is used to replenish the catalyst to the catalytic layer 113, so as to ensure that the catalytic layer 113 continuously catalyzes ammonia and NOx, and there is no need to frequently disassemble and replace the catalytic layer 113. A rotating sleeve 41 is rotatably arranged on the drain pipe 31, and a connecting rod 42 connected to the catalytic layer 113 is arranged on the rotating sleeve 41. A bevel gear 45 is connected to the rotating sleeve 41. A rotating sleeve 41 is rotatably arranged on the upper right side of the chimney 1 The rotating shaft 46 has a bevel gear 2 47 meshing with the bevel gear 1 45 connected to its end. The rotating shaft 46 is driven to rotate by a motor 48. The motor 48 is installed on the right side of the middle of the chimney 1. The output shaft of the motor 48 and the rotating shaft 46 are driven by a flat belt. The motor 48 is controlled to drive the rotating shaft 46 to drive the bevel gear 2 47 to rotate and mesh with the bevel gear 1 45. The bevel gear 1 45 will drive the connecting rod 42 to rotate through the rotating sleeve 41, and the connecting rod 42 will drive the catalytic layer 113 to rotate, so that the catalyst dropper 40 can evenly drip the catalyst into the catalytic layer 113, and the catalytic layer 113 can evenly catalytically treat the flue gas in the chimney 1, thereby avoiding the uneven flue gas treatment caused by the fixed position of the flue gas inlet pipe 12.

[0039] like Figure 5 and Figure 6As shown, it also includes a mounting plate 43 and a wedge block 44, a connecting rod 42 is slidably arranged on the rotating sleeve 41, and the catalytic layer 113 is slidably matched with the chimney 1, so that the catalytic layer 113 slides up and down in the chimney 1 to shake off some of the solid by-products attached, and a tension spring around the connecting rod 42 is connected between the catalytic layer 113 and the rotating sleeve 41, and the tension spring provides a reset force for the catalytic layer 113 after sliding; the drain pipe 31 is connected to the mounting plate 43, and the lower side of the mounting plate 43 is connected to the wedge block 44, and the upper end of the connecting rod 42 is in contact with the wedge block 44; under the meshing of the bevel gear 2 47 and the bevel gear 1 45, the rotation of the rotating sleeve 41 will drive the connecting rod 42 to rotate When in contact with the wedge block 44, the connecting rod 42 is squeezed and drives the catalytic filling layer 113 to move downward, the stretching spring is deformed, and the connecting rod 42 continues to rotate to separate from the wedge block 44, the stretching spring is reset, and the catalytic filling layer 113 will move up and reset under the action of the stretching spring reset, so that the catalyst can be evenly replenished and the flue gas can be evenly treated. At the same time, it can also automatically and synchronously rotate and shake up and down to shake off the attached solid by-products, and the shaking of the catalytic filling layer 113 can also accelerate the flow of surrounding air to fully mix the ammonia, lime powder and flue gas. The upper end of the connecting rod 42 is rotatably provided with a roller 422, and the roller 422 replaces the connecting rod 42 to contact and cooperate with the wedge block 44 to reduce friction.

[0040] like Figure 5 and Figure 7 As shown, it also includes a guide rail 51, a slider 52 and a scraper plate 53. The guide rail 51 is provided on the right inner side of the upper part of the chimney 1, and a slider 52 is slidably provided on the guide rail 51. A compression spring located in the guide rail 51 is connected between the slider 52 and the guide rail 51; the slider 52 is connected to the scraper plate 53 which contacts and cooperates with the lower side of the catalytic filling layer 113; the catalytic filling layer 113 rotates and contacts and cooperates with the scraper plate 53, and the scraper plate 53 scrapes off the solid by-products attached to the lower side of the catalytic filling layer 113, so as to quickly clean it up and avoid the accumulation of solid by-products affecting the catalytic effect. When the catalytic filling layer 113 shakes up and down, the scraper plate 53 will also adaptively shake up and down under the action of the compression spring to ensure the scraping effect.

[0041] like Figure 5 and Figure 7As shown, it also includes a connecting rod 54. The material discharge valve 13 includes a discharge frame 131 connected to the lower part of the chimney 1 and a discharge plate 132 slidably arranged on the discharge frame 131. When the discharge plate 132 is moved upward to open, the solid by-products at the bottom of the chimney 1 can be discharged from the discharge frame 131; a connecting rod 54 for transmitting power is connected between the slider 52 and the discharge plate 132; initially, the discharge plate 132 is in an open state, and the solid by-products in the chimney 1 are discharged normally. When the scraper moves downward to scrape the material, the scraper plate 53 will drive the connecting rod 54 to move downward through the slider 52, and the connecting rod 54 will drive the discharge plate 132 to move downward and close. Similarly, when the scraper moves upward to scrape the material, the discharge plate 132 will move upward and open, so that the discharge plate 132 can be automatically and synchronously discharged intermittently when cleaning the catalytic filling layer 113, so as to control the amount of discharge and discharge the material evenly to avoid excessive material discharge and cause gas leakage.

[0042] like Figure 3 , Figure 4 and Figure 8 As shown, the wet desulfurization and denitrification system 21 includes a limestone slurry spray pipe 211, an ammonia water spray pipe 213, a guide plate 212 and a catalytic packing layer 214. The chimney 2 is provided with a limestone slurry spray pipe 211, an ammonia water spray pipe 213 located above the limestone slurry spray pipe 211, a plurality of guide plates 212 stacked between the ammonia water spray pipe 213 and the limestone slurry spray pipe 211, and a catalytic packing layer 214 located between the ammonia water spray pipe 213 and the flue gas exhaust pipe 22; the inner side wall of the chimney 2 and the plurality of guide plates 212 together form a C-shaped bend guide channel 2121, and the guide channel 2121 increases the path of flue gas flow and improves the mixing time of ammonia water and flue gas; The flue gas discharged into the chimney 2 from the smoke sleeve 32 will be desulfurized by the limestone slurry sprayed from the limestone slurry spray pipe 211 in advance, and then the flue gas will pass through the guide channel 2121 formed by the guide plate 212 during its rising process. At this time, the ammonia water sprayed from the ammonia water spray pipe 213 can be fully mixed with the flue gas in the guide channel 2121, and then the flue gas will pass through the catalytic filling layer 214 for catalytic reaction, and finally the treated flue gas will be discharged through the flue gas exhaust pipe 22. In this process, the gypsum slurry produced by the desulfurization of the limestone slurry and the residual liquid by the denitrification of the ammonia water will fall into the drain pipe 31 through the through holes on the smoke delivery sleeve 32, and the above-mentioned liquid by-products can be discharged by controlling the valve in the drain pipe 31.

[0043] like Figure 8 and Fig. 9As shown, the wet desulfurization and denitrification system 21 also includes a partition 61 and a partition ring 62. The partition 61 is provided on the drain pipe 31. The partition 61 divides the interior of the drain pipe 31 into a first cavity 311 and a second cavity 312 that are opposite to each other and are not connected to each other. The partition 61 is sealed with the through hole of the smoke delivery sleeve 32, the chimney 1 and the chimney 2. The partition 61 divides the through hole of the smoke delivery sleeve 32 into two through holes that are opposite to each other and are not connected to each other. The two through holes on the smoke delivery sleeve 32 correspond to the first cavity 311 and the second cavity 312 on the drain pipe 31. The second cavity 311 and the second cavity 312 are connected with a partition ring 62 that is sealed with the partition plate 61, so that the smoke in the chimney 1 can only pass through the through hole corresponding to the first cavity 311 on the smoke delivery sleeve 32, and then enter the chimney 2 2; the spraying direction of the limestone slurry spray pipe 211 is toward the first cavity 311, so as to prevent the smoke from bypassing the limestone slurry spray pipe 211, so that the limestone slurry sprayed by the limestone slurry spray pipe 211 can be fully mixed with the smoke The gypsum slurry produced by the limestone slurry desulfurization will fall into the first volume chamber 311 of the drain pipe 31. The lower opening of the guide channel 2121 faces the second volume chamber 312. A flow channel for the flue gas after wet desulfurization is reserved between the partition 61 and the lowest guide plate 212. The flue gas treated by the limestone slurry desulfurization will be concentrated through the flow channel between the guide plate 212 and the partition 61 and flow into the guide channel 2121. The ammonia water spray pipe 213 then denitrates the flue gas in the guide channel 2121. The residual liquid from water denitrification will fall into the second cavity 312 of the drain pipe 31, so that the solid by-products and liquid by-products produced by dry desulfurization and denitrification and wet desulfurization and denitrification can be treated separately, and different liquid by-products produced by wet desulfurization and wet denitrification can be collected separately; two valves are provided, and the two valves are respectively installed in the first cavity 311 and the second cavity 312 of the drain pipe 31, and the discharge of liquid by-products in the first cavity 311 and the second cavity 312 can be controlled respectively by the two valves.

[0044] like Figure 8 and Fig. 9 As shown, the wet flue gas desulfurization and denitrification system 21 also includes a guide plate 63 and a blower 64. The inclined guide plate 63 is connected to the partition ring 62. The upper part of the guide plate 63 is inclined toward the direction close to the first cavity 311, so as to guide the flue gas in the chimney 1 to pass through the through hole of the smoke delivery sleeve 32 corresponding to the first cavity 311; the upper end of the partition plate 61 is bent toward the lower opening of the guide channel 2121, so as to guide the flue gas that has passed the wet flue gas desulfurization to the exhaust guide channel 2121, and the blower 64 is installed on the lower side of the bent part of the upper end of the partition plate 61, and the flue gas flow can be driven by controlling the blower 64.

[0045] A method for using the above flue gas desulfurization and denitrification equipment includes:

[0046] The flue gas enters the chimney 1 through the flue gas inlet pipe 12, and is preliminarily subjected to dry desulfurization and denitrification by the dry desulfurization and denitrification system 11, and the solid byproducts generated during the dry desulfurization and denitrification in the chimney 1 are discharged through the material discharge valve 13;

[0047] The flue gas then rises into chimney 2, and is then subjected to wet desulfurization and denitrification by the wet desulfurization and denitrification system 21. The liquid byproducts produced by the wet desulfurization and denitrification in chimney 2 will pass through the smoke delivery sleeve 32 and enter the drain pipe 31 for discharge, wherein the through hole on the smoke delivery sleeve 32 is smaller than the first end of the drain pipe 31 and the through hole on the smoke delivery sleeve 32 is surrounded by the pipe opening at the first end of the drain pipe 31 in the vertical direction.

[0048] Finally, the flue gas treated with dry desulfurization and denitrification and wet desulfurization and denitrification will be discharged through the flue gas exhaust pipe 22.

[0049] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. They only express the preferred implementation modes of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention.

[0050] It should be pointed out that, for ordinary technicians in this field, several modifications, increases and decreases in quantity, improvements and substitutions can be made without departing from the concept of the present invention. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

Claims

1. A flue gas desulfurization and denitrification device, comprising a chimney (1), a chimney (2), a dry desulfurization and denitrification system (11), a wet desulfurization and denitrification system (21), a flue gas inlet pipe (12), a material discharge valve (13), and a flue gas discharge pipe (22); the exhaust end of the chimney (1) is connected to the intake end of the chimney (2); the dry desulfurization and denitrification system (11) and the wet desulfurization and denitrification system (21) are respectively arranged in the chimney (1) and the chimney (2); the lower part of the chimney (1) is connected to the flue gas inlet pipe (12) and the material discharge valve (13) located below the flue gas inlet pipe (12); the upper part of the chimney (2) is connected to the flue gas discharge pipe (22); the characteristics are as follows: The invention also comprises a liquid discharge pipe (31) and a smoke delivery sleeve (32). The chimney 1 (1) and the chimney 2 (2) are concentric and the chimney 2 (2) is located above the chimney 1 (1). The chimney 1 (1) is provided with a liquid discharge pipe (31) for receiving liquid byproducts discharged from the chimney 2 (2) during wet desulfurization and denitrification. The liquid discharge pipe (31) has a built-in valve. The first end of the liquid discharge pipe (31) is located at the smoke exhaust end of the chimney 1 (1) and a valve is formed between the first end of the liquid discharge pipe (31) and the inner side wall of the smoke exhaust end of the chimney 1 (1). A predetermined distance is left for smoke to pass through, and the second end of the liquid discharge pipe (31) is connected to the outside of the chimney; a smoke delivery sleeve (32) is connected between the smoke discharge end of the first chimney (1) and the smoke inlet end of the second chimney (2), and a through hole is opened on the smoke delivery sleeve (32), and the first chimney (1) is connected to the second chimney (2) through the through hole on the smoke delivery sleeve; the through hole on the smoke delivery sleeve (32) is smaller than the first end of the liquid discharge pipe (31), and the through hole on the smoke delivery sleeve (32) is surrounded by the pipe opening of the first end of the liquid discharge pipe (31) in the vertical direction; The dry desulfurization and denitrification system (11) comprises an ammonia spray pipe (111), a lime powder spray gun (112), a catalytic packing layer (113) and an atomizing nozzle (14). The chimney (1) is provided with an ammonia spray pipe (111) located below the flue gas inlet pipe (12), a lime powder spray gun (112) located above the flue gas inlet pipe (12) and a catalytic packing layer (113) located above the lime powder spray gun (112). The spraying direction of the ammonia spray pipe (111) is upward. The flue gas inlet pipe (12) is provided with an atomizing nozzle (14) suitable for spraying an oxidant. The device also includes a catalyst dripping pipe (40), a rotating sleeve (41), a connecting rod (42), a bevel gear 1 (45), a rotating shaft (46), a bevel gear 2 (47) and a motor (48). The catalyst packing 1 (113) is slidably arranged on the chimney 1 (1). The catalyst packing 1 (113) is a fiber filter layer impregnated with a catalyst. The chimney 1 (1) is provided with a catalyst dripping pipe (40) located above the catalyst packing 1 (113). The drain pipe (31) is rotatably provided with a rotating sleeve (41). The rotating shaft (46) is provided with a connecting rod (42), a bevel gear 1 (45), a rotating shaft (46), a bevel gear 2 (47) and a motor (48). A connecting rod (42) connected to the catalytic packing layer 1 (113) is provided on the sleeve (41), a bevel gear 1 (45) is connected to the rotating sleeve (41), a rotating shaft (46) is rotatably provided on the chimney 1 (1), an end of the rotating shaft (46) is connected to a bevel gear 2 (47) meshing with the bevel gear 1 (45), the rotating shaft (46) is driven to rotate by a motor (48), the motor (48) is mounted on the chimney 1 (1), and a flat belt is used to drive the output shaft of the motor (48) and the rotating shaft (46).

2. A flue gas desulfurization and denitrification equipment according to claim 1, characterized in that: It also includes a mounting plate (43) and a wedge-shaped block (44), a connecting rod (42) is slidably mounted on the rotating sleeve (41), a catalytic packing layer 1 (113) and a chimney 1 (1) are slidably matched, and a tension spring is connected between the catalytic packing layer 1 (113) and the rotating sleeve (41); the mounting plate (43) is connected to the drain pipe (31), a wedge-shaped block (44) is connected to the lower side of the mounting plate (43), and the upper end of the connecting rod (42) is in contact with the wedge-shaped block (44).

3. A flue gas desulfurization and denitrification equipment according to claim 2, characterized in that: The invention also comprises a guide rail (51), a slider (52) and a scraper plate (53). The guide rail (51) is arranged inside the chimney (1). The slider (52) is slidably arranged on the guide rail (51). A compression spring located inside the guide rail (51) is connected between the slider (52) and the guide rail (51). The slider (52) is connected to the scraper plate (53) which contacts and cooperates with the lower side of the catalytic packing layer (113).

4. A flue gas desulfurization and denitrification equipment according to claim 3, characterized in that: It also includes a connecting rod (54). The material discharge valve (13) includes a material discharge frame (131) connected to the lower part of the chimney (1) and a material discharge plate (132) slidably arranged on the material discharge frame (131). A connecting rod (54) is connected between the slider (52) and the material discharge plate (132).

5. The flue gas desulfurization and denitrification equipment according to claim 1, characterized in that: The wet desulfurization and denitrification system (21) comprises a limestone slurry spray pipe (211), an ammonia water spray pipe (213), a guide plate (212) and a second catalytic packing layer (214); the second chimney (2) is provided with a limestone slurry spray pipe (211), an ammonia water spray pipe (213) located above the limestone slurry spray pipe (211), a plurality of guide plates (212) stacked between the ammonia water spray pipe (213) and the limestone slurry spray pipe (211), and a second catalytic packing layer (214) located between the ammonia water spray pipe (213) and the flue gas exhaust pipe (22); the inner side wall of the second chimney (2) and the plurality of guide plates (212) together form a bent guide channel (2121).

6. The flue gas desulfurization and denitrification equipment according to claim 5, characterized in that: The wet desulfurization and denitrification system (21) further comprises a partition (61) and a partition ring (62). The liquid discharge pipe (31) is provided with the partition (61). The partition (61) divides the interior of the liquid discharge pipe (31) into a first cavity (311) and a second cavity (312) which are not connected to each other. The partition (61) is in sealing cooperation with the through hole of the smoke delivery sleeve (32), the chimney one (1) and the chimney two (2). The partition (61) divides the through hole of the smoke delivery sleeve (32) into two through holes which are not connected to each other. The two through holes correspond to the first cavity (311) and the second cavity (312) on the drain pipe (31), respectively; a spacer ring (62) that seals with the partition plate (61) is connected between the second cavity (312) and the corresponding through hole; the spraying direction of the limestone slurry spray pipe (211) is toward the first cavity (311); the lower opening of the guide channel (2121) is toward the second cavity (312); and a flow channel for smoke to pass through is reserved between the partition plate (61) and the lowermost guide plate (212).

7. The flue gas desulfurization and denitrification equipment according to claim 6, characterized in that: The wet desulfurization and denitrification system (21) further comprises a guide plate (63) and a blower (64); the partition ring (62) is connected to an inclined guide plate (63); the upper portion of the guide plate (63) is inclined in a direction close to the first chamber (311); the upper end of the partition plate (61) is bent toward the lower opening of the guide channel (2121); and the blower (64) is installed on the lower side of the bent portion of the upper end of the partition plate (61).

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