An ultra-low emission desulfurization and dust removal device

Abstract

This utility model relates to the field of ceramic waste gas treatment technology, specifically to an ultra-low emission desulfurization and dust removal device, suitable for treating flue gas from ceramic spray drying towers or a mixture of spray drying tower flue gas and kiln flue gas. It includes a tower body, within which, from bottom to top, are arranged a spray layer, a demisting layer, a turbulence layer, a water film rinsing layer, and a turbulence dust collection layer. The demisting layer includes a frame fixed to the tower body and multiple baffles fixed to the frame. The demisting layer also has demisting rinsing pipes for rinsing the baffles. The turbulence layer includes a base plate and multiple turbulence generators mounted on the base plate. Each turbulence generator includes a cylinder and spiral guide vanes mounted inside the cylinder. The water film rinsing layer sprays a water film downwards onto the turbulence layer. The turbulence dust collection layer includes a support plate and multiple turbulence generators mounted on the support plate. Each turbulence generator has a dust removal cap on its top, and each dust removal cap has a rinsing nozzle. Each rinsing nozzle is connected to a water supply pipe, which can more effectively clean the attached gypsum and avoid clogging.

Description

Technical Field

[0001] This utility model relates to the field of ceramic waste gas treatment technology, specifically to an ultra-low emission desulfurization and dust removal device, which is suitable for the treatment of ceramic kiln flue gas, ceramic spray drying tower flue gas, and the mixture of spray drying tower flue gas and kiln flue gas. Background Technology

[0002] Currently, spray drying towers are widely used in the ceramics industry for material drying. Their main function is to dry the slurry material sprayed into the tower and deliver it as a solid powder. However, spray drying towers generate a large amount of flue gas after the drying process, which contains significant amounts of pollutants such as dust, sulfur dioxide, and nitrogen oxides. Traditionally, the emission concentrations of dust, nitrogen oxides, and sulfur dioxide from the flue gas generated by the ceramics industry far exceed the emission standards for flue gas pollutants in the ceramics industry, thus creating a bottleneck for the development of the ceramics industry and causing unavoidable pollution and damage to the atmospheric environment.

[0003] Desulfurization and dust removal of flue gas from drying towers and kilns are problems that the ceramics industry must face.

[0004] Chinese patent document CN221244625U discloses a dry desulfurization device for ceramic kilns, including a reactor support frame, a reactor body, a support beam, and a sleeve. The reactor body is fixed on the reactor support frame, and the support beam is provided inside the reactor body. The sleeve is placed on the support beam. An inlet flue is provided at the bottom of the reactor body, and an outlet flue is provided at the top. The device has a simple structure, small footprint, and simple operation. The desulfurizing agent only needs to be replaced when it is about to become ineffective.

[0005] For example, Chinese patent document CN213348365U discloses a rapid turbulent desulfurization tower for pressurized desulfurization, including a tower body and, from bottom to top, a liquid collection chamber, an air inlet pipe, a pressure boosting plate, a turbulence plate, and a spray pipe arranged in sequence within the tower body; an air outlet is also provided at the upper end of the tower body; a baffle plate is provided in the liquid collection chamber to divide the liquid collection chamber into a dynamic flow zone and a static flow zone; a conical hole is provided in the pressure boosting plate; the turbulence plate includes a mesh plate and multiple guides provided on the mesh plate, the guides including an upper arc plate, a support, and a lower arc plate. By setting a baffle plate in the liquid collection chamber, it is easy for precipitates to accumulate in the static flow zone, ensuring the contact effect between liquid and gas in the dynamic flow zone, and avoiding blockage of the drain pipe; the pressure boosting plate increases the flow velocity of the airflow passing through the pressure boosting plate, and the high-velocity airflow impacts the guides on the turbulence plate, forming turbulence and fully contacting the water mist formed by the spray pipe, increasing the reaction area and improving the desulfurization efficiency.

[0006] For example, Chinese patent document CN118203940B discloses a ceramic waste gas desulfurization and dust removal device, belonging to the field of ceramic waste gas treatment technology. It includes a desulfurization tower, a wet electrostatic precipitator, and a PLC controller. The desulfurization tower and the wet electrostatic precipitator are connected via a flue gas conveying channel, and the lower end of the desulfurization tower is fixedly connected to an inlet flue. This invention uses a one-stop purification device, occupies a small area, and can effectively treat multiple pollutants such as particulate matter, sulfur dioxide, and nitrogen oxides in flue gas in one pass. The desulfurization technology is mature and can meet the treatment needs of flue gas of various capacities. The wet electrostatic precipitator has high efficiency and uses water spraying to clean the dust on the electrode surface, eliminating secondary dust generation.

[0007] Some existing ceramic waste gas desulfurization and dust removal devices utilize turbulence converters. These converters are equipped with spiral blades. By setting the airflow through the turbulence converter, gypsum and flue gas / water undergo centrifugal motion. Through centrifugal force, the water and gypsum are thrown into the converter's cylinder, achieving separation of the water / gypsum from the gas. However, gypsum adhering to the inner wall of the turbulence converter easily causes blockage, requiring regular manual flushing, which is extremely inconvenient and difficult to clean thoroughly. This leads to frequent re-clogging and affects flue gas treatment efficiency. Summary of the Invention

[0008] In view of the above-mentioned technical problems existing in the prior art, this utility model provides an ultra-low emission desulfurization and dust removal device.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An ultra-low emission desulfurization and dust removal device is provided, including a vertically arranged tower body, and a spray layer, a demisting layer, a turbulence layer, a water film washing layer and a turbulence dust collection layer arranged sequentially from bottom to top inside the tower body;

[0011] The bottom of the tower body serves as a liquid collection tank, and a flue gas inlet pipe is located between the spray layer and the liquid collection tank in the tower body.

[0012] The demisting layer includes a frame fixed to the tower body and multiple baffles fixed to the frame. The frame is in the shape of a continuously bent roof, and the multiple baffles are arranged horizontally on the frame. The demisting layer is also equipped with a demisting flushing pipe for flushing the baffles.

[0013] The turbulence layer includes a substrate and multiple turbulence generators mounted on the substrate. Each turbulence generator includes a cylinder and a spiral guide vane mounted inside the cylinder. A water film flushing layer is used to spray a water film downwards onto the turbulence layer.

[0014] The turbulent dust collection layer includes a support plate and multiple turbulence generators installed on the support plate. Each turbulence generator is equipped with a dust collection cap on top, and each dust collection cap is equipped with a flushing nozzle. Each flushing nozzle is connected to a water supply pipe.

[0015] As a further alternative, the number of spray layers is two or more, and each spray layer is arranged longitudinally with the nozzles of adjacent spray layers staggered.

[0016] As a further optional solution, each spray layer includes a bracket and a pipe assembly. The bracket is fixed to the inner wall of the tower body, and the pipe assembly includes an interconnected main water supply pipe and multiple spray branch pipes. The multiple spray branch pipes are arranged in parallel along the length of the main water supply pipe, and each spray branch pipe is separated by L-shaped pipes that spray downwards along its length.

[0017] As a further alternative, the diameter of the main water supply pipe and the sprinkler branch pipes can be gradually reduced along their length.

[0018] As a further optional solution, the pipe layout of each spray layer is the same, and the relative circumferential rotation deviates from the preset angle.

[0019] As a further optional solution, each spray layer includes multiple spray pipes arranged circumferentially on the inner wall of the tower. Each spray pipe extends into the tower and is equipped with a first nozzle and a second nozzle that are inclined downward at a preset angle. The first nozzle is located in the middle of the spray pipe and the second nozzle is located at the end of the spray pipe.

[0020] As a further optional solution, the demisting layer includes a first demisting layer and a second demisting layer arranged longitudinally, and supports are provided on the inner wall of the tower. The skeletons of the first demisting layer and the second demisting layer are locked to different supports.

[0021] As a further alternative, the baffle is a C-shaped structure with hooks.

[0022] As a further optional solution, the side wall of the water supply pipe is connected to multiple connecting hoses, the ends of which are provided with pipe fittings. Each flushing nozzle includes a spiral nozzle and a connecting thread, the connecting thread being adapted to the pipe fitting, and the spiral nozzle extending into the dust collection cap.

[0023] As a further optional solution, a circulation pump is installed on the outside of the tower body, and the circulation pump is connected to the collection tank and each spray layer via pipeline.

[0024] The beneficial effects of this utility model are:

[0025] This utility model discloses an ultra-low emission desulfurization and dust removal device. During use, flue gas enters the tower and flows upward, passing through a spray layer, a demisting layer, a turbulent layer, a water film washing layer, and a turbulent dust collection layer in sequence. In the demisting layer, the clear water and gypsum in the flue gas agglomerate and adhere to the surface of the baffle plates through collision between the baffle plates. The gypsum adhering to the surface of the demisting layer is washed to the collection pool at the bottom by periodic water washing.

[0026] At the turbulent flow layer and turbulent dust collection layer, after the flue gas enters the turbulent flow device, the centrifugal force generated by the spiral guide vanes separates the free water and gypsum slurry from the flue gas. The separated free water flows down the inner wall of the vortex cylinder into the collection tank, while the separated gypsum adheres to the inner wall of the cylinder. Because each dust collector cap is equipped with a flushing nozzle, the gypsum adhering to the dust collector cap and the inside of the turbulent flow device can be cleaned more effectively, avoiding clogging. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an ultra-low emission desulfurization and dust removal device in one of the embodiments.

[0029] Figure 2 This is a schematic diagram of one embodiment of the spray layer.

[0030] Figure 3 This is a comparison view of the three spray layers.

[0031] Figure 4 This is a schematic diagram of a second embodiment of the spray layer.

[0032] Figure 5 This is a schematic diagram of the spray pipe and tower body in the embodiment.

[0033] Figure 6 This is a schematic diagram of the nozzle in the embodiment.

[0034] Figure 7 This is a schematic diagram of the defogging layer in the embodiment.

[0035] Figure 8 This is a schematic diagram of the baffle plate in the embodiment.

[0036] Figure 9 This is a schematic diagram of the turbulent layer in the embodiment.

[0037] Figure 10 This is a schematic diagram of the turbulent dust collection layer in the embodiment.

[0038] Figure 11 This is a schematic diagram of the combination of the turbulence generator, flushing nozzle, and dust collector cap in the embodiment.

[0039] Figure label:

[0040] Tower body 1, liquid collection tank 11, flue gas inlet pipe 12, support 13;

[0041] Spray layer 2;

[0042] Bracket 21, pipe assembly 22, main water supply pipe 23, sprinkler branch pipe 24, L-shaped pipe 25;

[0043] Spray pipe 31, nozzle 32, spiral nozzle 321, connecting thread 322, bend 33, high-pressure rubber hose 34;

[0044] Demisting layer 4, frame 41, baffle 42, demisting flushing pipe 43;

[0045] Turbulent layer 5, substrate 51, turbulence generator 52, cylinder 521, spiral guide vane 522;

[0046] Water film rinsing layer 6;

[0047] Turbulent dust collection layer 7, support plate 71, dust collection cap 72;

[0048] 8. Flushing nozzle, 91. Water supply pipe, 92. Connecting hose, 93. Pipe connector. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0050] This embodiment provides an ultra-low emission desulfurization and dust removal device, such as... Figure 1 As shown, the tower body 1 is arranged vertically. Inside the tower body 1, from bottom to top, there are a spray layer 2, a demisting layer 4, a turbulent layer 5, a water film washing layer 6, and a turbulent dust collection layer 7. The bottom of the tower body 1 serves as a liquid collection tank 11. A flue gas inlet pipe 12 is provided between the spray layer 2 and the liquid collection tank 11. After entering, the flue gas flows upward and is treated by each layer before being discharged from the exhaust pipe at the top.

[0051] The number of spray layers 2 is three, and the first embodiment of spray layer 2 combines... Figure 1 , Figure 2 and Figure 3 As shown, there are three spray layers, from bottom to top: a first spray layer, a second spray layer, and a third spray layer. Each spray layer 2 is arranged longitudinally and includes a bracket 21 and a pipe assembly 22. The bracket 21 is fixed to the inner wall of the tower body 1. The pipe assembly 22 includes an interconnected main water supply pipe 23 and multiple spray branch pipes 24. The multiple spray branch pipes 24 are arranged side by side along the length of the main water supply pipe 23, and each spray branch pipe 24 is separated by downward-spraying L-shaped pipes 25 along its length. The diameter of the main water supply pipe 23 and the spray branch pipes 24 decreases progressively along their length.

[0052] Specifically, the pipe layout of each spray layer 2 is the same, and they rotate relative to each other at a preset angle. Especially as... Figure 3As shown, the bottom view comparison of the three spray layers 2 shows that the second spray layer is rotated and offset clockwise relative to the first spray layer by a certain angle, and the third spray layer is rotated and offset counterclockwise relative to the first spray layer by a certain angle, so as to achieve the staggered arrangement of the nozzles of the adjacent spray layers 2.

[0053] The second embodiment of spray layer 2 combines Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, each spray layer 2 includes multiple spray pipes 31 arranged circumferentially on the inner wall of the tower body 1. Each spray pipe 31 extends into the tower and has two nozzles 32 with downward-facing nozzles along its length. Each nozzle 32 includes a spiral nozzle 321 and a connecting thread 322 for connecting the spray pipe 31. The multiple spray pipes 31 are arranged radially along the tower body 1, and the spray pipes 31 of the three spray layers 2 are longitudinally staggered, similar to the rotation offset of different layers at a preset angle in the previous embodiment. Of course, the number of nozzles 32 corresponding to each spray pipe 31 can be adjusted according to the actual situation. Compared with the existing long and short spray gun method, the structure is more optimized, which can reduce the number of pipes, facilitate installation, reduce spray blind spots, and improve the spraying effect. Specifically, the nozzles 32 of each spray pipe 31 include a first nozzle and a second nozzle inclined downward at a preset angle. The first nozzle is located in the middle of the spray pipe 31, and the second nozzle is located at the end of the spray pipe 31.

[0054] In practice, spray layer 2 can be selected from... Figure 2 The water film spray shown can also be selected as... Figure 4 The side spray method shown can, of course, be used in combination.

[0055] In practice, a circulation pump (not shown in the figure) can be installed on the outside of the tower body 1. The circulation pump is connected to the liquid collection tank 11 and each spray layer 2 via a pipeline for liquid circulation. For example, water is supplied to the main water supply pipe 23. Alternatively, the spray pipes 31 are sealed and fixed to the side wall of the tower body 1. A bend 33 connecting multiple spray pipes 31 is installed on the outside of the tower body 1. The bend 33 is connected to the circulation pump, and the bend 33 and the spray pipes 31 are connected via a high-pressure rubber hose 34.

[0056] Combination Figure 1 , Figure 7 and Figure 8As shown, in this embodiment, the number of demisting layers 4 is two, including a first demisting layer and a second demisting layer arranged longitudinally. Supports 13 are provided on the inner wall of the tower body 1, and the frames 41 of the first and second demisting layers are locked to different supports 13. Each layer includes a frame 41 fixed to the tower body 1 and multiple baffles 42 fixed to the frame 41. The frame 41 is in the shape of a continuously bent roof ridge, and the baffles 42 are C-shaped with hooks. Multiple baffles 42 are arranged laterally on the frame 41. As the flue gas rises, the spacing of the baffles 42 in the demisting layer 4 is adjusted to achieve a reasonable wind speed. Water and gypsum in the flue gas agglomerate and adhere to the surface of the baffles 42 through collisions between them. Periodic water rinsing washes the gypsum adhering to the surfaces of the two demisting layers 4 to the collection tank 11 at the bottom. The carrying of water and gypsum in the flue gas is effectively prevented from being carried out by the interception and collision of the hooks, and the water in the flue gas agglomerates better.

[0057] More importantly, the demisting layer 4 is also equipped with a demisting flushing pipe 43 for flushing the baffle plate 42. It is normally closed and can be activated periodically to flush the plaster on the surface of the demisting layer 4.

[0058] Combination Figure 1 , Figure 9 , Figure 10 and Figure 11 As shown, in this embodiment, both the turbulence layer 5 and the turbulence dust collection layer 7 employ turbulence generators 52.

[0059] The turbulence layer 5 includes a substrate 51 and multiple turbulence generators 52 mounted on the substrate 51. Each turbulence generator 52 includes a cylinder 521 and spiral guide vanes 522 installed inside the cylinder 521. 324 turbulence generators 52 with spiral guide vanes 522 are used. Their function is as follows: after the flue gas enters the turbulence generator 52, the spiral diameter narrows, reducing the cross-sectional area and increasing the flue gas velocity. This causes the flue gas to have its own acceleration, and the centrifugal force generated by the spiral guide vanes 522 separates the free water and gypsum slurry from the flue gas. The separated free water flows down the inner wall of the cylinder 521 into the collection tank 11, while the separated gypsum adheres to the inner wall of the cylinder 521. The water film flushing layer 6 sprays a water film downwards onto the turbulence layer 5. A set time is used to flush the inner wall of the cyclones with clean water, returning it to the circulation tank. The flow rate is designed to be 1.5-2.0 m / s, and each turbulence generator 52 can handle an air volume of 2000-2500 m³ / s. 3 / each, effectively controlling particulate matter emissions to achieve an ultra-low emission standard of 10mg / Nm3.

[0060] The turbulent dust collection layer 7 includes a support plate 71 and multiple turbulence collectors 52 mounted on the support plate 71. Each turbulence collector 52 has a dust collection cap 72 on its top, and each dust collection cap 72 is equipped with a flushing nozzle 8, which is connected to a water supply pipe 91. To effectively flush the dust collection caps 72 and the interior of the turbulence collectors 52, each dust collection cap 72 is optimized with an individual flushing nozzle 8, which effectively solves the clogging problem. The system employs 324 turbulence collectors with spiral blades, dust collection caps, and a single turbulence collector flushing valve to achieve ultra-low dust emissions of less than 10 mg / Nm3.

[0061] A specially designed structure is used to capture dust from flue gas to achieve ultra-low dust emissions.

[0062] The side wall of the water supply pipe 91 is connected to multiple connecting hoses 92, and the ends of the hoses are provided with pipe joints 93. Similarly, each flushing nozzle 8 includes a spiral nozzle 321 and a connecting thread 322. The connecting thread 322 is adapted to the pipe joint 93, and the spiral nozzle 321 extends into the dust removal cap 72.

[0063] The nozzles 32 used in the spray layer 2 are the same as those in the rinsing nozzles 8, and therefore the same markings are used.

[0064] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0065] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0066] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0067] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. An ultra-low emission desulfurization and dust removal device, characterized in that: It includes a vertically arranged tower body (1), and inside the tower body (1) are arranged from bottom to top a spray layer (2), a demisting layer (4), a turbulence layer (5), a water film washing layer (6) and a turbulence dust collection layer (7); The bottom of the tower body (1) serves as a liquid collection tank (11), and a flue gas inlet pipe (12) is provided in the tower body (1) between the spray layer (2) and the liquid collection tank (11); The demisting layer (4) includes a frame (41) fixed to the tower body (1) and multiple baffles (42) fixed to the frame (41). The frame (41) is in the shape of a continuously bent roof, and the multiple baffles (42) are arranged horizontally on the frame (41). The demisting layer (4) is also provided with a demisting flushing pipe (43) for flushing the baffles (42). The turbulence layer (5) includes a substrate (51) and a plurality of turbulence generators (52) mounted on the substrate (51). Each turbulence generator (52) includes a cylinder (521) and a spiral guide vane (522) mounted inside the cylinder (521). A water film flushing layer (6) is used to spray a water film downward onto the turbulence layer (5). The turbulent dust collection layer (7) includes a support plate (71) and multiple turbulence generators (52) installed on the support plate (71). Each turbulence generator (52) is provided with a dust removal cap (72) on top. Each dust removal cap (72) is provided with a flushing nozzle (8). Each flushing nozzle (8) is connected to a water supply pipe (91).

2. The ultra-low emission desulfurization and dust removal device according to claim 1, characterized in that: The number of spray layers (2) is two or more, and each spray layer (2) is arranged longitudinally and the nozzles of adjacent spray layers (2) are staggered.

3. The ultra-low emission desulfurization and dust removal device according to claim 2, characterized in that: Each spray layer (2) includes a bracket (21) and a pipe assembly (22). The bracket (21) is fixed to the inner wall of the tower body (1). The pipe assembly (22) includes a main water supply pipe (23) and multiple spray branch pipes (24) that are interconnected. The multiple spray branch pipes (24) are arranged in parallel along the length of the main water supply pipe (23). Each spray branch pipe (24) is separated by L-shaped pipes (25) that spray downwards along the length.

4. The ultra-low emission desulfurization and dust removal device according to claim 3, characterized in that: water supply... The main pipe (23) and the spray branch pipes (24) are arranged with their diameters decreasing step by step along their length.

5. The ultra-low emission desulfurization and dust removal device according to claim 3, characterized in that: The pipe layout of each spray layer (2) is the same, and the relative circumferential rotation deviates from the preset angle.

6. The ultra-low emission desulfurization and dust removal device according to claim 2, characterized in that: Each spray layer (2) includes multiple spray pipes (31) arranged circumferentially on the inner wall of the tower body (1). Each spray pipe (31) extends into the tower. Each spray pipe (31) is provided with a first nozzle and a second nozzle that are inclined downward at a preset angle. The first nozzle is located in the middle of the spray pipe (31), and the second nozzle is located at the end of the spray pipe (31).

7. The ultra-low emission desulfurization and dust removal device according to claim 1, characterized in that: The demisting layer (4) includes a first demisting layer and a second demisting layer arranged longitudinally. The inner wall of the tower body (1) is provided with a support (13). The skeleton (41) of the first demisting layer and the second demisting layer is locked to different supports (13).

8. The ultra-low emission desulfurization and dust removal device according to claim 7, characterized in that: The baffle (42) has a C-shaped hook structure.

9. The ultra-low emission desulfurization and dust removal device according to claim 1, characterized in that: The side wall of the water supply pipe (91) is connected to multiple connecting hoses (92), and the ends of the hoses are provided with pipe fittings (93). Each flushing nozzle (8) includes a spiral nozzle (321) and a connecting thread (322). The connecting thread (322) is adapted to the pipe fitting (93), and the spiral nozzle (321) extends into the dust removal cap (72).

10. The ultra-low emission desulfurization and dust removal device according to claim 1, characterized in that: A circulation pump is installed on the outside of the tower body (1), and the circulation pump is connected to the liquid collection tank (11) and each spray layer (2) via a pipeline.

Images