A flue gas desulfurization environmental protection equipment with dynamic change of contact area

Abstract

The application discloses a kind of environmental protection equipment with dynamic change contact area of waste gas desulfurization, belong to waste gas desulfurization technical field.It includes spray tower, respectively in the lower and upper of spray tower and net gas outlet, the two ends of long axis are fixedly connected with the ellipsoidal silk screen of rotation axis A and rotation axis B, motor, plane silk screen, lye conveying pipe, a plurality of lower spray nozzles for spraying lye to ellipsoidal silk screen, a plurality of upper spray nozzles for spraying lye to plane silk screen, lye tank, ball screw, guide column, nut moving block, clean sliding plate, elastic cleaning brush, and intermittent step transmission mechanism for driving nut moving block intermittent step moving.The application is a kind of environmental protection equipment with simple structure, the function of dynamic change contact area of alkaline solution and sulfur oxide, can significantly improve industrial waste gas desulfurization efficiency and desulfurization effect.

Description

Technical Field

[0001] This invention mainly relates to the field of waste gas desulfurization technology, specifically a waste gas desulfurization environmental protection device with dynamically changing contact area. Background Technology

[0002] Industrial waste gas, especially flue gas from gas-fired boilers, typically contains large amounts of sulfides and dust particles, thus requiring purification before release to prevent air pollution. Commonly used desulfurization towers include four main types: spray towers, packed towers, dual-loop towers, and jet blasting towers. Spray towers, also known as aerosol towers, are widely used in wet desulfurization systems due to their simple structure, low cost, low gas pressure drop, and non-clogging nature. While existing spray towers have achieved desulfurization of industrial waste gas, they still have certain drawbacks: the contact area between the absorbent and sulfur-containing oxides is limited and cannot be dynamically adjusted, significantly restricting desulfurization efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in view of the technical problems existing in the prior art, the present invention provides an environmental protection device with a simple structure, which has the function of dynamically changing the contact area between alkaline solution and sulfur-containing oxides, and can significantly improve the desulfurization efficiency and desulfurization effect of industrial waste gas.

[0004] To address the above problems, the solution proposed in this invention is as follows:

[0005] A waste gas desulfurization environmental protection device with dynamically changing contact area includes a spray tower, a clean gas outlet and an inlet pipe respectively located above and below the spray tower, a rotating shaft A and a rotating shaft B respectively rotatably mounted on the two side walls of the spray tower and coaxial, an ellipsoidal wire mesh with its long axis fixedly connected to the two ends of the rotating shaft A and the rotating shaft B respectively, a motor driving the rotating shaft A to rotate, a planar wire mesh fixedly mounted on the inner wall of the spray tower and located above the ellipsoidal wire mesh, an alkali solution delivery pipe installed between the planar wire mesh and the ellipsoidal wire mesh, a plurality of lower nozzles connected to the alkali solution delivery pipe for spraying alkali solution onto the ellipsoidal wire mesh, and a plurality of lower nozzles connected to the alkali solution delivery pipe for spraying alkali solution onto the spray tower. The device comprises: an upper nozzle for spraying alkaline solution onto the flat wire mesh; an alkaline solution tank fixedly mounted on the outer wall of the spray tower and connected to the alkaline solution delivery pipe; a ball screw rotatably mounted on the side wall of the spray tower with one end extending outward; a guide post mounted parallel to the ball screw; a nut moving block slidably mounted on the guide post and helically connected to the ball screw; a cleaning sliding plate fixedly connected to the nut moving block; several freely movable elastic cleaning brushes mounted on the cleaning sliding plate for cleaning the mesh of the flat wire mesh; and an intermittent stepping transmission mechanism mounted between the rotating shaft B and the ball screw for driving the nut moving block to move intermittently in a stepping manner.

[0006] Furthermore, several of the aforementioned elastic cleaning brushes have identical structures, each including a connecting plate, an elastic metal wire and several elastic fiber filaments fixedly mounted at the bottom of the connecting plate, a lifting sliding rod fixedly mounted at the top of the connecting plate at its lower end, and a compression spring connected at both ends to the cleaning sliding plate and the lifting sliding rod respectively; the cleaning sliding plate has several downward-opening lifting guide grooves along the vertical direction, the number of lifting guide grooves being equal to the number of lifting sliding rods, and corresponding one-to-one; the upper end of the lifting sliding rod is slidably mounted in the lifting guide groove; several elastic fiber filaments are axially symmetrically distributed around the elastic metal wire.

[0007] Furthermore, when the compression deformation of the anti-compression spring is zero, the bottom of the elastic metal wire and the elastic fiber filament is lower than the lower surface of the planar wire mesh.

[0008] Furthermore, the intermittent stepping transmission mechanism includes a double-toothed gear fixedly mounted on the rotating shaft B, a rotating shaft C rotatably mounted on the side wall of the spray tower and located outside the spray tower, a sprocket B fixedly mounted on the ball screw, a sprocket A and an idler gear fixedly mounted on the rotating shaft C, and a transmission chain connecting the sprocket A and the sprocket B; the idler gear intermittently meshes with the double-toothed gear, and the idler gear rotates one tooth increment for every one revolution of the double-toothed gear.

[0009] Furthermore, the present invention also includes a plurality of sealing caps, which are respectively used to seal the rotational connections of the rotating shafts A, B, and C with the spray tower.

[0010] Compared with existing technologies, this invention has the following advantages and beneficial effects: The waste gas desulfurization environmental protection equipment of this invention, which dynamically changes the contact area, is equipped with a rotating ellipsoidal wire mesh and a stationary planar wire mesh. The rotating ellipsoidal wire mesh not only increases the contact area between the alkaline solution and sulfur-containing oxides in the industrial waste gas, but also dynamically changes the contact area between the sulfur-containing oxides and the alkaline solution, thereby achieving rapid desulfurization. The planar wire mesh allows the small amount of sulfur-containing oxides in the industrial waste gas that did not previously come into contact with the ellipsoidal wire mesh to have another opportunity to come into contact with the alkaline solution, thus ensuring that the waste gas flowing out of the clean gas outlet is sulfur-free clean gas. Furthermore, the rotating ellipsoidal wire mesh can also generate centrifugal force on the dust particles and reaction product particles accumulated on the surface of the ellipsoidal wire mesh, thereby achieving the effect of automatically cleaning the mesh openings of the ellipsoidal wire mesh. The ellipsoidal wire mesh rotates slowly, driving the elastic cleaning brush to move stepwise through an intermittent stepping transmission mechanism, performing quasi-static cleaning of dust particles and reaction product particles at the mesh openings of the planar wire mesh, effectively preventing sulfur-containing oxides from leaking onto the top of the planar wire mesh, and significantly improving the desulfurization effect of the industrial waste gas. Therefore, this invention is an environmental protection device with a simple structure, capable of dynamically changing the contact area between alkaline solution and sulfur-containing oxides, and able to significantly improve the desulfurization efficiency and effect of industrial waste gas. Attached Figure Description

[0011] Figure 1 This is a schematic diagram illustrating the structural principle of a waste gas desulfurization environmental protection device with dynamically changing contact area according to the present invention.

[0012] Figure 2 This is a schematic diagram showing the connection between several elastic cleaning brushes and the cleaning sliding plate in this invention.

[0013] Figure 3 This is a schematic diagram showing the relative positions of the nut moving block and the cleaning sliding plate in the spray tower in this invention.

[0014] In the diagram, 1—Spray tower; 10—Inlet pipe; 11—Clean air outlet; 12—Alkali tank; 13—Alkali delivery pipe; 14—Lower nozzle; 15—Upper nozzle; 21—Ellipsoidal wire mesh; 22—Rotating shaft A; 23—Rotating shaft B; 24—Motor; 25—Planar wire mesh; 251—Mesh; 31—Ball screw; 32—Guide column; 33—Nut moving block; 34—Cleaning sliding plate; 341—Lifting guide groove; 41—Double toothed gear; 42—Rotating shaft C; 43—Idler wheel; 44—Sprocket A; 45—Drive chain; 46—Sprocket B; 51—Connecting disc; 52—Lifting sliding rod; 53—Elastic metal wire; 54—Elastic fiber filament; 55—Compression spring; 6—Sealing cover. Detailed Implementation

[0015] For ease of description, the waste gas to be desulfurized will be referred to as industrial waste gas, the solution that can chemically react with the sulfur-containing oxides in the industrial waste gas will be referred to as alkaline solution, and the waste gas flowing out of the clean gas outlet 11 of the spray tower 1 after desulfurization will be referred to as sulfur-free clean gas. The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] See Figures 1 to 3This invention discloses a waste gas desulfurization environmental protection device with dynamically changing contact area, comprising a spray tower 1, a clean gas outlet 11 and an inlet pipe 10 respectively disposed above and below the spray tower 1, rotating shafts A22 and B23 respectively rotatably mounted on the two side walls of the spray tower 1 and coaxially arranged, an ellipsoidal wire mesh 21 whose two ends of the long axis are respectively fixedly connected to the rotating shafts A22 and B23, a motor 24 for driving the rotating shaft A22, a planar wire mesh 25 fixedly mounted on the inner wall of the spray tower 1 and located above the ellipsoidal wire mesh 21, an alkaline solution delivery pipe 13 installed between the planar wire mesh 25 and the ellipsoidal wire mesh 21, a plurality of lower nozzles 14 connected to the alkaline solution delivery pipe 13 for spraying alkaline solution onto the ellipsoidal wire mesh 21, and a plurality of connecting... The system includes an upper nozzle 15 for spraying alkali solution onto the flat wire mesh 25 via an alkali solution delivery pipe 13; an alkali solution tank 12 fixedly mounted on the outer wall of the spray tower 1 and connected to the alkali solution delivery pipe 13; a ball screw 31 rotatably mounted on the side wall of the spray tower 1 with one end extending outward; a guide column 32 mounted parallel to the ball screw 31; a nut moving block 33 slidably mounted on the guide column 32 and helically connected to the ball screw 31; a cleaning sliding plate 34 fixedly connected to the nut moving block 33; several elastic cleaning brushes that can move freely up and down mounted on the cleaning sliding plate 34; and an intermittent stepping transmission mechanism mounted between the rotating shaft B23 and the ball screw 31 for driving the nut moving block 33 to move intermittently in a stepping manner. In practice, the alkali tank 12 is filled with alkaline solution. A pressure pump (not shown in the figure) is installed on the alkali delivery pipe 13 to control the flow of the alkaline solution from the tank 12 to the pipe 13. When the pressure pump (not shown in the figure) is turned on, the alkaline solution in the lower nozzle 14 is sprayed onto the ellipsoidal wire mesh 21 below it, while the alkaline solution in the upper nozzle 15 is sprayed onto the planar wire mesh 25 above it. When the pressure pump (not shown in the figure) is turned off, the lower nozzle 14 and the upper nozzle 15 stop spraying the alkaline solution. Industrial waste gas flows into the bottom of the spray tower 1 through the clean gas pipe 10. The ellipsoidal wire mesh 21, filled with alkaline solution, rotates slowly, allowing the sulfur-containing oxides in the industrial waste gas to fully contact the alkaline solution, thereby reacting with the alkaline solution to achieve desulfurization. As the industrial waste gas inside the spray tower 1 increases, some sulfur-containing oxides rise with the industrial waste gas to the flat wire mesh 25, where they react with the alkaline solution. As a result, the gas flowing out of the mesh 251 of the flat wire mesh 25 no longer contains sulfur, and finally the sulfur-free clean gas above the flat wire mesh 251 flows out from the clean gas outlet 11.

[0017] Both the ellipsoidal wire mesh 21 and the flat wire mesh 25 have equally spaced mesh openings 251. The movement direction of the cleaning sliding plate 34 is perpendicular to its length. The ellipsoidal wire mesh 21 increases the static contact area between sulfur-containing oxides in the industrial waste gas and the alkaline solution, thereby improving the desulfurization efficiency of the industrial waste gas. The flat wire mesh 25 allows a small amount of sulfur-containing oxides in the industrial waste gas that did not initially come into contact with the ellipsoidal wire mesh 21 to re-contact the alkaline solution, ensuring that the waste gas flowing out of the clean gas outlet 11 is sulfur-free clean gas. The cleaning sliding plate 34 moves slowly and stepwise along the guide column 32, allowing the elastic cleaning brush to sweep away dust particles and reaction product particles located at the mesh openings 251 of the flat cleaning mesh 25, preventing the mesh openings 251 from clogging.

[0018] As a preferred option, see Figure 3 Several elastic cleaning brushes have the same structure, each including a connecting plate 51, an elastic metal wire 53 and several elastic fiber filaments 54 fixedly installed at the bottom of the connecting plate 51, a lifting sliding rod 52 fixedly installed at the top of the connecting plate 51 at its lower end, and a compression spring 55 connected at both ends to the cleaning sliding plate 34 and the lifting sliding rod 52 respectively. Several downward-opening lifting guide grooves 341 are formed on the cleaning sliding plate 34 along the vertical direction. The number of lifting guide grooves 341 is equal to the number of lifting sliding rods 52, and they correspond one-to-one. The upper end of the lifting sliding rod 52 is slidably installed in the lifting guide groove 341. Several elastic fiber filaments 54 are axially symmetrically distributed around the elastic metal wire 53. In actual use, the area directly below each elastic cleaning brush may be either the mesh of a flat wire mesh 25 or the solid part of the flat wire mesh 25. If the area directly beneath the flexible cleaning brush is the mesh 251, the ends of the flexible metal wire 53 and the flexible fiber filament 54 in the flexible cleaning brush extend into the mesh 251 under the elastic force of the anti-compression spring 55, thereby pushing away the dust particles and reaction product particles accumulated in the mesh 251. If the area directly beneath the flexible cleaning brush is the solid part of the flat mesh 25, under the support of the flexible metal wire 53, the ends of the flexible metal wire 53 and the flexible fiber filament 54 in the flexible cleaning brush will abut against the upper surface of the flat mesh 25, thereby causing the anti-compression spring 55 to compress and deform. As several flexible cleaning brushes move with the cleaning sliding plate 34, the flexible metal wire 53 and the flexible fiber filament 54 will clean the dust particles and reaction product particles near the mesh 251 directly beneath them.

[0019] Preferably, when the compression deformation of the compression spring 55 is zero, the bottom of the elastic metal wire 53 and the elastic fiber filament 54 is lower than the lower surface of the planar wire mesh 25. In specific implementation, the stiffness of the compression spring 55 should be selected so that the elastic metal wire 53 in a bent state can freely return to a straight state.

[0020] Preferably, the intermittent stepping transmission mechanism includes a double-toothed gear 41 fixedly mounted on a rotating shaft B23, a rotating shaft C42 rotatably mounted on the side wall of the spray tower 1 and located outside the spray tower 1, a sprocket B46 fixedly mounted on a ball screw 31, a sprocket A44 and an idler gear 43 fixedly mounted on the rotating shaft C42, and a transmission chain 45 that drives the sprocket A44 and the sprocket B46; the idler gear 43 intermittently meshes with the double-toothed gear 41, and the idler gear 43 rotates one tooth for every one revolution of the double-toothed gear 41. In practical use, motor 24 drives shaft A22 to rotate slowly in the forward direction, ellipsoidal wire mesh 21 and shaft B23 rotate in the forward direction, double-toothed gear 41 rotates slowly in the forward direction, and engages with idler gear 43 once per revolution. Through sprocket A44, transmission chain 45 and sprocket B46, it drives ball screw 31 to rotate in a stepwise manner. Nut moving block 33, under the combined action of guide post 32 and ball screw 31, drives several elastic cleaning brushes mounted on the bottom of cleaning sliding plate 34 to move stepwise from left to right. The ellipsoidal wire mesh 21 moves to clean the dust particles and reaction product particles accumulated in the mesh 251 of the flat wire mesh 25. When the ellipsoidal wire mesh 21 rotates continuously in the forward direction for a period of time, the cleaning sliding plate 34 moves to the right limit position. Then, the motor 24 drives the rotating shaft A22 to rotate slowly in the reverse direction, and the ellipsoidal wire mesh 21 and the rotating shaft B23 rotate in the opposite direction. Several elastic cleaning brushes installed at the bottom of the cleaning sliding plate 34 move step by step from right to left until the cleaning sliding plate 34 reaches the left limit position.

[0021] Preferably, the present invention further includes a plurality of sealing caps 6, which are used to seal the rotational connections between the rotating shafts A22, B23, and C42 and the spray tower 1. The sealing caps 6 are prior art and will not be described in detail here.

[0022] The working process of this invention is as follows: First, industrial waste gas is controllably transported to the bottom of the spray tower 1 through the inlet pipe 10; then, the pressure pump (not shown in the figure) is started, and the upper nozzle 15 and the lower nozzle 14 spray alkaline solution onto the flat wire mesh 25 and the ellipsoidal wire mesh 21 respectively; finally, the motor 24 rotates alternately in the forward and reverse directions, the ellipsoidal wire mesh 21 rotates slowly, and the contact area between the alkaline solution and the sulfur-containing oxides in the industrial waste gas changes dynamically to achieve rapid desulfurization. The flat wire mesh 25 performs secondary desulfurization on the industrial waste gas. At the same time, the elastic cleaning brush moves in a stepping motion to clean the dust particles and reaction product particles at the mesh 251 of the flat wire mesh 25.

[0023] The working principle of this invention is as follows: Motor 24 drives rotating shaft A22 to slowly rotate forward until the cleaning sliding plate 34 moves to the right limit position; motor 24 drives rotating shaft A22 to slowly rotate in the reverse direction until the cleaning sliding plate 34 moves to the left limit position. The slow rotation of ellipsoidal wire mesh 21 not only improves the uniformity of alkaline solution distribution on the surface of ellipsoidal wire mesh 21, but also changes the dynamic contact area between sulfur-containing oxides in industrial waste gas and alkaline solution, thereby improving desulfurization efficiency; the slow rotation of ellipsoidal wire mesh 21 can generate centrifugal force on the dust particles and reaction product particles accumulated on the surface of ellipsoidal wire mesh 21, achieving the effect of automatically removing dust particles and reaction product particles at the mesh 251 of ellipsoidal wire mesh 21. During the slow forward rotation of ellipsoidal wire mesh 21, several elastic cleaning brushes move stepwise from left to right to clean the flat wire mesh 25; during the slow reverse rotation of ellipsoidal wire mesh 21, several elastic cleaning brushes move stepwise from right to left to clean the flat wire mesh 25. Therefore, as the ellipsoidal wire mesh 21 rotates slowly, the elastic cleaning brush cleans away the dust particles and reaction product particles accumulated at the mesh 251 of the planar wire mesh 25. Since the elastic cleaning brush moves intermittently in a step-by-step manner, the cleaning process can be regarded as a quasi-static process, meaning that sulfur-containing oxides in industrial waste gas will not leak onto the planar wire mesh 25 at any given time.

[0024] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without creative effort should fall within the scope of protection of the present invention.

Claims

1. A waste gas desulfurization environmental protection device with dynamically changing contact area, comprising a spray tower (1), a clean gas outlet (11) and an air inlet pipe (10) respectively disposed above and below the spray tower (1), characterized in that, Also includes: Rotating shafts A (22) and B (23) are respectively mounted on the two side walls of the spray tower (1) and are coaxial. An ellipsoidal wire mesh (21) with its two ends of its long axis fixedly connected to the rotating shafts A (22) and B (23) respectively, a motor (24) drives the rotating shaft A (22) to rotate, a flat wire mesh (25) is fixedly mounted on the inner wall of the spray tower (1) and located above the ellipsoidal wire mesh (21), an alkali delivery pipe (13) is installed between the flat wire mesh (25) and the ellipsoidal wire mesh (21), several lower nozzles (14) connected to the alkali delivery pipe (13) for spraying alkali onto the ellipsoidal wire mesh (21), several upper nozzles (15) connected to the alkali delivery pipe (13) for spraying alkali onto the flat wire mesh (25), and fixedly mounted on the spray tower (1). The alkaline tank (12) is located on the outer wall of the tower (1) and is connected to the alkaline delivery pipe (13). A ball screw (31) is rotatably mounted on the side wall of the spray tower (1) and extends outward at one end. A guide column (32) is mounted parallel to the ball screw (31). A nut moving block (33) is slidably mounted on the guide column (32) and spirally connected to the ball screw (31). A cleaning sliding plate (34) is fixedly connected to the nut moving block (33). Several elastic cleaning brushes that can move freely up and down are mounted on the cleaning sliding plate (34) for cleaning the mesh (251) of the flat wire mesh (25). An intermittent stepping transmission mechanism is mounted between the rotating shaft B (23) and the ball screw (31) for driving the nut moving block (33) to move intermittently in a stepping manner.

2. The waste gas desulfurization environmental protection equipment with dynamically changing contact area according to claim 1, characterized in that, Several of the aforementioned elastic cleaning brushes have the same structure, each including: a connecting plate (51), an elastic metal wire (53) and several elastic fiber filaments (54) fixedly installed at the bottom of the connecting plate (51), a lifting sliding rod (52) fixedly installed at the top of the connecting plate (51) at its lower end, and a compression spring (55) with its two ends connected to the cleaning sliding plate (34) and the lifting sliding rod (52) respectively; the cleaning sliding plate (34) has several downward-opening lifting guide grooves (341) along the vertical direction, the number of lifting guide grooves (341) is equal to the number of lifting sliding rods (52), and they correspond one-to-one; the upper end of the lifting sliding rod (52) is slidably installed in the lifting guide groove (341); several elastic fiber filaments (54) are axially symmetrically distributed around the elastic metal wire (53).

3. The waste gas desulfurization environmental protection equipment with dynamically changing contact area according to claim 2, characterized in that, When the compression deformation of the anti-compression spring (55) is zero, the bottom of the elastic metal wire (53) and the elastic fiber filament (54) is lower than the lower surface of the planar wire mesh (25).

4. The waste gas desulfurization environmental protection equipment with dynamically changing contact area according to claim 1, characterized in that, The intermittent stepping transmission mechanism includes: a double-toothed gear (41) fixedly mounted on the rotating shaft B (23), a rotating shaft C (42) rotatably mounted on the side wall of the spray tower (1) and located outside the spray tower (1), a sprocket B (46) fixedly mounted on the ball screw (31), a sprocket A (44) and an idler gear (43) fixedly mounted on the rotating shaft C (42), and a transmission chain (45) that drives the sprocket A (44) and the sprocket B (46); the idler gear (43) intermittently meshes with the double-toothed gear (41), and the idler gear (43) rotates one tooth for every one revolution of the double-toothed gear (41).

5. The waste gas desulfurization environmental protection equipment with dynamically changing contact area according to claim 4, characterized in that, It also includes several sealing caps (6), which are used to seal the rotating connections of the rotating shaft A (22), rotating shaft B (23), rotating shaft C (42) and the spray tower (1).

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