Flue gas desulfurization efficiency-improving device on basis that tower cannot be increased

Abstract

The invention discloses a flue gas desulfurization efficiency-improving device on the basis that a tower cannot be added, and relates to the technical field of flue gas desulfurization, the flue gas desulfurization efficiency-improving device comprises a desulfurization tower, the interior of the desulfurization tower is of a hollow structure with an opening in the top end, and the interior of the desulfurization tower is sequentially provided with a smoke exhaust layer, a desulfurization layer, a smoke inlet layer and a water storage layer from top to bottom; the gas guide assembly comprises a horizontal flue opening which is formed in the side wall of the desulfurization tower and corresponds to the smoke inlet layer, and an oxidation air pipe which is positioned below the horizontal flue; and a gas purification assembly. The number of operating pumps is reduced by optimizing the configuration and operation mode of the slurry circulating pump, so that the energy consumption is reduced; by optimizing the design of the spraying frame and the nozzles, such as using a one-way double-head hollow conical nozzle and adjusting the spraying direction of the nozzles, the risk of nozzle blockage is reduced, and the washing to the tower wall is avoided; through the porous design of the tray and the adjustment of the spraying direction of the nozzle, the flow of flue gas in the tower is optimized, the channeling, bias flow and wall flow phenomena are reduced, and the desulfurization efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas desulfurization, and in particular to a flue gas desulfurization efficiency improvement device on the basis that it is impossible to increase the tower. Background Art

[0002] With the acceleration of industrialization and the increase in energy consumption, the SO2 emission problem of coal-fired power plants has become increasingly prominent, causing serious impacts on the environment. In order to save energy and protect the environment, power plants generally use limestone-gypsum wet flue gas desulfurization process to reduce SO2 emissions.

[0003] At present, the flue gas desulfurization efficiency improvement devices of power plant units are all configured with one furnace and one tower, where it is impossible to add towers. Among them, the existing absorption tower is generally: the diameter is 12m, and the slurry volume is about 1,200 tons when the liquid level is 10m. The desulfurization system is designed to have a sulfur content of 1.2% in coal, and the limestone slurry is transported to the four spray layers of the absorption tower through four slurry circulation pumps. There is generally a layer of porous distributor in the tower, located below the spray layer. The porous distributor has an opening rate of 42% and a thickness of 3mm. Its function is to guide the flue gas so that the flue gas and slurry can fully react and improve the desulfurization efficiency.

[0004] Although the existing desulfurization process can reduce SO2 emissions to a certain extent, there are the following problems in actual operation: In order to meet the environmental protection requirements of desulfurization, the system keeps four slurry circulation pumps running for a long time, resulting in high electricity consumption in the desulfurization plant. There is no backup pump for the slurry circulation pump. Once a failure occurs, it will directly affect the safe operation of the desulfurization system. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above-mentioned problems existing in the existing flue gas desulfurization efficiency improvement device without the ability to increase the tower, the present invention is proposed.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a flue gas desulfurization efficiency improvement device on the basis of being unable to add towers, comprising a desulfurization tower, the interior of the desulfurization tower being a hollow structure with an opening at the top, the interior of the desulfurization tower being, from top to bottom, a smoke exhaust layer, a desulfurization layer, a smoke intake layer and a water storage layer; an air guide component, comprising a horizontal flue opening arranged on the side wall of the desulfurization tower and corresponding to the smoke intake layer, and an oxidation air duct located below the horizontal flue, one end of the oxidation air duct extending out of the desulfurization tower and connected to an exhaust pump; and, a clean air component, comprising a spray rack and a tray arranged in the desulfurization layer, and a slurry supply pipe and a slurry circulation pump arranged outside the desulfurization tower.

[0008] As a preferred solution of the flue gas desulfurization efficiency improvement device described in the present invention when it is impossible to add a tower, one end of the slurry supply pipe is connected to the output end of the slurry circulation pump, and the other end of the slurry supply pipe is connected to the water inlet of the spray rack; the input end of the slurry circulation pump is connected to the water outlet of the aquifer located at the bottom of the desulfurization tower.

[0009] As a preferred solution of the flue gas desulfurization efficiency improvement device of the present invention without adding a tower, the spray rack includes a main pipe and a plurality of branch pipes connected to the main pipe, the branch pipes intersect the main pipe vertically, and the branch pipes are provided with nozzles spraying downwards.

[0010] As a preferred solution of the flue gas desulfurization efficiency improvement device of the present invention without adding a tower, the nozzles on the spray rack are all unidirectional double-headed hollow cone nozzles.

[0011] As a preferred solution of the flue gas desulfurization efficiency improvement device of the present invention without adding towers, the main pipe and branch pipes are both stepped and arranged from wide to narrow along the flow direction of the desulfurization slurry, and each step of the main pipe is provided with two symmetrically distributed branch pipes.

[0012] As a preferred solution of the flue gas desulfurization efficiency improving device of the present invention when it is impossible to add a tower, the nozzles located in the peripheral area of ​​the spray rack have a spray direction inclined downward toward the center of the desulfurization tower; and the diameter of the nozzles located in the peripheral area of ​​the spray rack is larger than the diameter of the nozzles located in the central area of ​​the spray rack.

[0013] As a preferred solution of the flue gas desulfurization efficiency improvement device of the present invention without adding a tower, the spray rack in the desulfurization layer is one or more layers, and each layer of the spray rack corresponds to one slurry supply pipeline and slurry circulation pump.

[0014] As a preferred solution of the flue gas desulfurization efficiency improvement device of the present invention without adding a tower, the tray is a porous distributor tray, and the upper part of the tray carries the tower filler.

[0015] As a preferred solution of the flue gas desulfurization efficiency improvement device described in the present invention when it is impossible to increase the tower, the tray in the desulfurization layer is one or more layers; when the tray is one layer, the tray is located below the spray rack; when the tray and the spray rack have the same number of layers, the tray and the spray rack are arranged alternately from top to bottom in the order of "spray rack-tray-spray rack".

[0016] As a preferred solution of the flue gas desulfurization efficiency improvement device described in the present invention when it is impossible to add a tower, a smoke exhaust hood is arranged on the top of the desulfurization tower, one end of the smoke exhaust hood is connected to the smoke exhaust layer on the top of the desulfurization tower, and one end of the smoke exhaust hood is bent to the other end so that the desulfurized flue gas is discharged obliquely downward to the outside of the desulfurization tower.

[0017] The beneficial effects of the present invention are as follows: by optimizing the configuration and operation mode of the slurry circulation pump, the number of operating pumps is reduced, thereby reducing energy consumption; by optimizing the design of the spray rack and the nozzle, such as using a one-way double-headed hollow cone nozzle and adjusting the spray direction of the nozzle, the risk of nozzle blockage is reduced and the scouring of the tower wall is avoided; through the porous design of the tray and the adjustment of the spray direction of the nozzle, the flow of flue gas in the tower is optimized, the channel flow, deviation flow and wall flow phenomena are reduced, and the desulfurization efficiency is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the flow direction of limestone slurry in the present invention.

[0021] Figure 3 It is a schematic diagram of the partial structure of the air purification component in the present invention.

[0022] Figure 4 It is a side view of the spray rack in the present invention.

[0023] Figure 5 It is a top view of the spray rack in the present invention.

[0024] Figure 6 This is a distribution diagram of the porous distributor A, A1~A34 modules on the tray of the present invention.

[0025] Figure 7 It is a side view of the tray in the present invention.

[0026] Figure 8 It is a schematic diagram of the opening structure of the porous distributor A1~A34 modules in the present invention.

[0027] Fig. 9 Schematic diagram of the opening structure of the porous distributor A module in the present invention.

[0028] Fig.10 It is a schematic diagram of the structure of the porous distributor A module in the present invention.

[0029] In the figure: 100, desulfurization tower; 101, smoke exhaust layer; 102, desulfurization layer; 103, smoke inlet layer; 104, water storage layer; 105, smoke exhaust hood; 200, air guide assembly; 201, horizontal flue outlet; 202, oxidation air duct; 300, clean air assembly; 301, spray rack; 301a, main pipe; 301b, branch pipe; 301c, nozzle; 302, tray; 303, slurry supply pipeline; 304, slurry circulation pump; 304a, circulation pump A; 304b, circulation pump B; 304c, circulation pump C; 304d, circulation pump D; 305, slurry pipe; 305a, inlet valve; 306, pure slurry pipeline; 306a, entrance door A; 306b, entrance door B; 306c, entrance door C; 306d, emptying door. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0034] Example 1

[0035] Reference Figure 1 to Figure 5 , which is the first embodiment of the present invention, provides a flue gas desulfurization efficiency improvement device on the basis of being unable to add towers, including a desulfurization tower 100, an air guide component 200 and an air purification component 300; wherein, the interior of the desulfurization tower 100 is a hollow structure with an opening at the top, the air guide component 200 is used to introduce sulfur-containing flue gas into the interior of the desulfurization tower 100, and the air purification component 300 is used to desulfurize the flue gas entering the interior of the desulfurization tower 100.

[0036] Furthermore, the interior of the desulfurization tower 100 is composed of a smoke exhaust layer 101 , a desulfurization layer 102 , a smoke intake layer 103 and an aquifer 104 from top to bottom.

[0037] Furthermore, the air guide assembly 200 includes a horizontal flue port 201 disposed on the side wall of the desulfurization tower 100 and corresponding to the smoke inlet layer 103, and an oxidation air duct 202 located below the horizontal flue, one end of the oxidation air duct 202 extends out of the desulfurization tower 100 and is connected to an exhaust pump. When in use, the exhaust pump operates to make the interior of the desulfurization tower 100 in a negative pressure state, thereby guiding the sulfur-containing flue gas to enter the interior of the desulfurization tower 100 from the horizontal flue port 201, and the sulfur-containing flue gas moves upward along the tower body after entering the interior of the desulfurization tower 100.

[0038] Furthermore, the clean air assembly 300 includes a spray rack 301 and a tray 302 arranged in the desulfurization layer 102, and a slurry supply pipe 303 and a slurry circulation pump 304 arranged outside the desulfurization tower 100; wherein, one end of the slurry supply pipe 303 is connected to the output end of the slurry circulation pump 304, and the other end of the slurry supply pipe 303 is connected to the water inlet of the spray rack 301; the input end of the slurry circulation pump 304 is connected to the water outlet of the aquifer 104 located at the bottom of the desulfurization tower 100.

[0039] Specifically, when in use, the vacuum pump is operated to guide the sulfur-containing flue gas into the desulfurization tower 100; at the same time, the slurry circulation pump 304 is operated to extract the desulfurization slurry in the aquifer 104 at the bottom of the inner cavity of the desulfurization tower 100, spray the sulfur-containing flue gas, and the desulfurization slurry reacts with the sulfur-containing flue gas to remove sulfur ions in the sulfur-containing flue gas to achieve flue gas purification; wherein, the desulfurization slurry is selected as limestone slurry. After the desulfurization slurry reacts with the sulfur-containing flue gas, it falls and flows back to the aquifer 104, realizing the circulation of the limestone slurry and continuously desulfurizing the sulfur-containing flue gas.

[0040] Example 2

[0041] Reference Figure 2 to Figure 10, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the spray rack 301 includes a main pipe 301a and a plurality of branch pipes 301b connected to the main pipe 301a. The branch pipes 301b intersect the main pipe 301a vertically. The branch pipes 301b are provided with nozzles 301c spraying downward. The nozzles 301c on the spray rack 301 are all one-way double-headed hollow cone nozzles 301c. Figure 5 As shown, there are a total of 110 nozzles 301c on each spray rack 301, of which 30 are located in the peripheral area of ​​the spray rack 301 (i.e., the nozzles 301c arranged circumferentially along the inner wall of the desulfurization tower 100), and 80 are located in the peripheral area of ​​the spray rack 301.

[0042] Specifically, the main pipe 301a and the branch pipes 301b are both stepped and arranged from wide to narrow along the flow direction of the desulfurized slurry. Two symmetrically distributed branch pipes 301b are provided on each step of the main pipe 301a, and at least two symmetrically distributed nozzles 301c are provided on each step of the branch pipe 301b.

[0043] Specifically, the spraying direction of the nozzle 301c located in the outer peripheral area of ​​the spray frame 301 is inclined downward toward the center of the desulfurization tower 100.

[0044] Specifically, the diameter of the nozzle 301 c located in the outer peripheral area of ​​the spray rack 301 is larger than the diameter of the nozzle 301 c located in the central area of ​​the spray rack 301 .

[0045] In summary, based on the protection of the tower wall by the absorption tower spray layer and the reduction of the loss of droplets on the tower wall, the nozzles 301c arranged around the desulfurization tower 100 are usually solid cone nozzles 301c. This device replaces the edge solid cone nozzle 301c with a hollow cone nozzle 301c with a larger free diameter, which can effectively reduce the risk of nozzle 301c blocking. At the same time, in order to prevent the hollow cone nozzle 301c from scouring the tower wall, the nozzle 301c located on the periphery of the spray frame 301 is set to spray in a direction inclined downward toward the center of the desulfurization tower 100. After the slurry is sprayed out, the direction of the tower wall is basically vertically downward, thereby avoiding scouring the tower wall.

[0046] Furthermore, the spray rack 301 in the desulfurization layer 102 is one layer or multiple layers, and each layer of the spray rack 301 corresponds to a slurry supply pipeline 303 and a slurry circulation pump 304 .

[0047] Furthermore, a porous distributor is provided on the tray 302, and the upper part of the tray 302 carries the tower filler. The porous design ensures that the desulfurization slurry is evenly distributed in the tower to avoid excessive or insufficient liquid in some parts; at the same time, the porous distributor can make the flue gas flow more evenly in the tower, reducing the channel flow, bias flow and wall flow phenomena; further, by optimizing the distribution of liquid and flue gas, it is ensured that the two are fully in contact, thereby improving the desulfurization efficiency.

[0048] Furthermore, the overall opening ratio of the tray 302 is 34.8%, referring to Figure 6 As shown, the porous distributor on the tray 302 is composed of 35 types of modules, of which 70 type A modules are arranged in the middle of the tray 302, and the remaining A1 to A34 type modules are arranged at the edge of the tray 302, one module each.

[0049] Specifically, the A-type module is square, and the A1-A34-type modules are square and are cut according to the outer circumference of the tray 302; further, the openings on the A-type module and the A1-A34-type modules are evenly distributed.

[0050] Specifically, refer to Figure 8 As shown, the blocking rate of the A-type module is designed to be about 6%; the blocking rate of the edge A1~A34 modules is designed to be 10%~15%. The opening rate of the edge tray module (A1~A34) is slightly smaller, which can make the tray 302 adapt to the characteristics of the slightly low coverage rate (spraying amount) of the nozzle 301c around the tower wall, increase the resistance of the edge tray module, thereby reducing the amount of smoke passing through the edge tray module and optimizing the flow field distribution in the tower.

[0051] Table 1 Opening area of ​​different pallet modules before and after optimization (module number corresponds to the drawing)

[0052]

[0053]

[0054] Specifically, the trays 302 in the desulfurization layer 102 are one or more layers. When the trays 302 are one layer, the trays 302 are located below the spray racks 301; when the trays 302 and the spray racks 301 have the same number of layers, the trays 302 and the spray racks 301 are arranged alternately from top to bottom in the order of "spray rack 301-tray 302-spray rack 301". Figure 1 As shown, in this embodiment, four layers of spray racks 301 and one layer of tray 302 are arranged in the desulfurization layer 102 .

[0055] A smoke exhaust hood 105 is provided on the top of the desulfurization tower 100, one end of the smoke exhaust hood 105 is connected to the smoke exhaust layer 101 on the top of the desulfurization tower 100, and the other end of the smoke exhaust hood 105 is bent, so that the desulfurized flue gas is discharged downwardly to the outside of the desulfurization tower 100. Such a configuration can prevent rainwater from entering the desulfurization tower 100 from the top opening of the desulfurization tower 100, and can make the desulfurized flue gas contact with the bent arm of the smoke exhaust hood 105 when it is discharged, thereby intercepting a part of the solid particles in the flue gas and reducing the emission of particulate matter to the atmosphere.

[0056] The remaining structures are the same as those of Example 1.

[0057] Example 3

[0058] Reference Figure 1 to Figure 3 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that: Figure 1 As shown, in this embodiment, four layers of spray racks 301 are arranged in the desulfurization layer 102, and each layer of spray rack 301 corresponds to a slurry supply pipeline 303 and a slurry circulation pump 304, that is, in this embodiment, four slurry circulation pumps 304 are arranged, which are respectively circulation pump A 304a, circulation pump B 304b, circulation pump C 304c, and circulation pump D 304d. Among them, circulation pump D 304d is the main pump, and is connected to the top spray rack 301 through the slurry supply pipeline 303.

[0059] Furthermore, the clean air component 300 also includes a slurry pipe 305 connecting the outlet of the aquifer 104 at the bottom of the desulfurization tower 100 and the inlet of the slurry circulation pump 304. An inlet valve 305a is provided at one end of the slurry pipe 305 close to the desulfurization tower 100, and a pressure gauge is provided at one end of the slurry pipe 305 close to the inlet of the slurry circulation pump 304, which is used to monitor the internal pressure of the slurry pipe 305 when extracting limestone slurry.

[0060] Furthermore, the clean air component 300 also includes a pure slurry pipeline 306, one end of which extends to the bottom of a slurry pool (shown in the figure), and the slurry pool is filled with unused limestone slurry. The other end of the pure slurry pipeline 306 is connected to the pressure gauge interface of the slurry pipe 305 of the circulation pump D304d.

[0061] Specifically, the pure slurry pipeline 306 is provided with an inlet gate A306a, an inlet gate B306b, an inlet gate C306c and an emptying gate 306d in sequence along the flow direction of the limestone slurry, wherein the inlet gate A306a and the inlet gate B306b are arranged at one end close to the slurry pool, and the inlet gate C306c and the emptying gate 306d are arranged at one end close to the circulation pump D304d.

[0062] In summary, the device directly connects the circulation pump D304d and the slurry pool by installing a pure slurry pipeline 306. The circulation pump D304d is the main pump with the largest power and the longest running time. By setting it in this way, the unused limestone slurry can be directly introduced into the desulfurization tower 100 and react with the sulfur-containing flue gas, effectively improving the desulfurization efficiency. When the circulation pump D304d is turned off or the unused limestone slurry is not needed, the emptying door 306d is set on the pure slurry pipeline 306 to empty the slurry inside the pipeline to prevent the slurry from drying and blocking the pipeline.

[0063] When the slurry circulation pump 304D is running, the limestone slurry can be directly supplied to the top spray layer through the slurry circulation pump 304; when the slurry circulation pump 304D is stopped, it can be switched to the original slurry pipe 305. The following is an explanation of the operation logic of the device after the pure slurry pipeline 306 is installed:

[0064] 1) If the inlet door A306a on the pure pulp pipeline 306 is opened, the inlet door B306b is opened at the same time; if the inlet door A306a is closed, the inlet door B306b is closed at the same time. That is, the inlet door A306a and the inlet door B306b are opened and closed at the same time.

[0065] 2) When the slurry circulation pump 304D is running, the original slurry pipe 305 can be used to go to the top of the desulfurization tower 100, or it can be switched to the pure slurry pipeline 306. If the pure slurry pipeline 306 is to be switched, the following conditions are required: the running signal of the circulation pump D304d, and the emptying door 306d, the entrance door A306a and the entrance door A306a closing signal are normal; after the conditions are met, the entrance door A306a and the entrance door B306b are opened at the same time.

[0066] 3) If the circulation pump D304d stops operating, the slurry supply automatically switches to the original slurry pipe 305. Once the circulation pump D304d stops operating, the inlet gate A306a and the inlet gate B306b are closed at the same time, and the inlet valve 305a on the slurry pipe 305 is opened synchronously; after the above three pneumatic gates are in place, the emptying gate 306d on the pure slurry pipe 306 is opened to empty the residual slurry in the pure slurry pipe 306.

[0067] Comparison and analysis of desulfurization efficiency improvement before and after desulfurization system optimization:

[0068] Comparative Example 1

[0069] Slurry circulation pump A+B+C combination

[0070] Unit load (MW) 110 190 250 280 Calculate SO2 value before efficiency improvement and optimization 2400 1700 1200 1150 Converted SO2 value after efficiency improvement and optimization 2600 2100 1600 1450 Improved adaptability to inlet SO2 (%) +8.33 +23.53 +33.33 +26.09

[0071] Comparative Example 2

[0072] Slurry circulation pump A+B+D combination

[0073] Unit load (MW) 200 250 300 Calculate SO2 value before efficiency improvement and optimization 1700 1500 1500 Converted SO2 value after efficiency improvement and optimization 1900 1800 1700 Improved adaptability to inlet SO2 (%) +11.76 +20.00 +13.33

[0074] Comparative Example 3

[0075] Slurry circulation pump A+C+D combination

[0076] #4 Unit Load (MW) 200 250 300 Calculate SO2 value before efficiency improvement and optimization 2000 1700 1400 Converted SO2 value after efficiency improvement and optimization 2200 1900 1600 Improved adaptability to inlet SO2 (%) +10.00 +11.76 +14.29

[0077] Comparative Example 4

[0078] Slurry circulation pump B+C+D combination

[0079] #4 Unit Load (MW) 200 250 290 345 Calculate SO2 value before efficiency improvement and optimization 2100 1900 1400 1500 Converted SO2 value after efficiency improvement and optimization 2300 2100 1500 1600 Improved adaptability to inlet SO2 (%) +9.52 +10.53 +7.14 +6.67

[0080] Comparative Example 5

[0081] Slurry circulation pump A+B+C+D combination

[0082] #4 unit load (MW) 220 250 Calculate SO2 value before efficiency improvement and optimization 2300 2500 Converted SO2 value after efficiency improvement and optimization 2700 2500 Improved adaptability to inlet SO2 (%) +17.39 +0.00

[0083] Data analysis: After the desulfurization efficiency improvement optimization of the unit, the desulfurization efficiency of the three slurry circulation pumps operation combination has been improved to varying degrees; the desulfurization efficiency of the four slurry circulation pumps operation combination, 200~250MW, has also been improved compared with before optimization.

[0084] The remaining structure is the same as that of Example 2.

[0085] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0086] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0087] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0088] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A flue gas desulfurization efficiency improvement device on the basis of being unable to increase the tower, characterized by: The desulfurization tower (100) comprises a hollow structure with an open top, and the desulfurization tower (100) comprises a smoke exhaust layer (101), a desulfurization layer (102), a smoke intake layer (103) and a water storage layer (104) from top to bottom; An air guide assembly (200) comprises a horizontal flue opening (201) arranged on the side wall of the desulfurization tower (100) and corresponding to the smoke inlet layer (103), and an oxidation air duct (202) located below the horizontal flue, wherein one end of the oxidation air duct (202) extends out of the desulfurization tower (100) and is connected to an exhaust pump; and The clean air assembly (300) comprises a spray rack (301) and a tray (302) arranged in the desulfurization layer (102), and a slurry supply pipeline (303) and a slurry circulation pump (304) arranged outside the desulfurization tower (100).

2. The flue gas desulfurization efficiency improvement device without adding a tower as claimed in claim 1, characterized in that: One end of the slurry supply pipeline (303) is connected to the output end of the slurry circulation pump (304), and the other end of the slurry supply pipeline (303) is connected to the water inlet of the spray rack (301); the input end of the slurry circulation pump (304) is connected to the water outlet of the aquifer (104) at the bottom of the desulfurization tower (100).

3. The flue gas desulfurization efficiency improvement device without adding a tower as claimed in claim 1 or 2, characterized in that: The spray rack (301) comprises a main pipe (301a) and a plurality of branch pipes (301b) communicating with the main pipe (301a), wherein the branch pipes (301b) intersect the main pipe (301a) vertically, and nozzles (301c) for spraying downwards are arranged on the branch pipes (301b).

4. The flue gas desulfurization efficiency improvement device according to claim 3, wherein: The nozzles (301c) on the spray rack (301) all adopt unidirectional double-headed hollow cone nozzles (301c).

5. The flue gas desulfurization efficiency improvement device without adding a tower as claimed in claim 3, characterized in that: The main pipe (301a) and the branch pipes (301b) are both in a stepped structure and are arranged from wide to narrow along the flow direction of the desulfurized slurry. Two symmetrically distributed branch pipes (301b) are arranged on each step of the main pipe (301a).

6. The flue gas desulfurization efficiency improvement device without adding a tower as claimed in claim 4, characterized in that: The nozzles (301c) located in the peripheral area of ​​the spray rack (301) have a spray direction that is inclined downward toward the center of the desulfurization tower (100); and the nozzles (301c) located in the peripheral area of ​​the spray rack (301) have a larger diameter than the nozzles (301c) located in the central area of ​​the spray rack (301).

7. The flue gas desulfurization efficiency improvement device without adding a tower as claimed in claim 1, 2, 5 or 6, characterized in that: The spray rack (301) in the desulfurization layer (102) is one layer or multiple layers, and each layer of the spray rack (301) corresponds to one slurry supply pipeline (303) and a slurry circulation pump (304).

8. The flue gas desulfurization efficiency improvement device without adding a tower as claimed in claim 7, characterized in that: The tray (302) is a porous distributor tray (302), and the upper part of the tray (302) carries the tower filler.

9. The flue gas desulfurization efficiency improvement device according to claim 8, wherein: The tray (302) in the desulfurization layer (102) is one or more layers; When the tray (302) is a layer, the tray (302) is located below the spray rack (301); When the tray (302) and the spray rack (301) have the same number of layers, the tray (302) and the spray rack (301) are arranged alternately from top to bottom in the order of "spray rack (301)-tray (302)-spray rack (301)".

10. The flue gas desulfurization efficiency improvement device according to claim 1, or 2, or 5, or 6, or 8, or 9, wherein: A smoke exhaust hood (105) is provided on the top of the desulfurization tower (100), one end of the smoke exhaust hood (105) is connected to the smoke exhaust layer (101) on the top of the desulfurization tower (100), and one end of the smoke exhaust hood (105) is bent at the other end so that the desulfurized flue gas is discharged downwardly to the outside of the desulfurization tower (100).

Images