Dry-type desulfurization reaction tower

Abstract

The utility model relates to the technical field of desulfurization devices, in particular to a dry desulfurization reaction tower. According to the dry desulfurization reaction tower, an outlet flue is arranged at the other end of a tower body; the outlet flue is a 1 / 4 circular bent pipe, an opening is formed in the lower surface of the outlet flue, and a dust collecting pipe is mounted at the opening; the dust collecting pipe is connected with a material returning pipe; the material returning pipe is communicated with the tower body; the dust collecting pipe comprises a tangent pipe and a vertical pipe which are connected, and the tangent pipe is arranged in the tangent direction of the midpoint of the outer contour line of the outlet flue. An inclined gas-solid separation partition plate is further installed at the opening and divides an inner cavity of the outlet flue into a dust channel and a flue gas channel, the dust channel is communicated with the tangent pipe, and the flue gas channel is communicated with the outlet end of the outlet flue. According to the utility model, dust enters the dust collecting pipe under the action of centrifugal force by utilizing the layering effect of the gas-solid separation partition plate, then enters the material returning pipe through the star-shaped air locking valve and finally returns to the dry desulfurization reaction tower, so that the utilization rate of lime and the desulfurization effect are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to desulfurization device technical field especially a dry desulfurization reaction tower. BACKGROUND

[0002] Dry desulfurization reaction tower is a kind of equipment to carry out desulfurization treatment to flue gas.In prior art, in order to increase the residence time of flue gas in tower body, the height of tower body is often increased or sleeve type dry desulfurization reaction tower is used, for example, Chinese patent CN208493803U specifically discloses a sleeve type venturi dry reaction tower, but the above technical scheme only increases the residence time of flue gas in tower body, and the utilization rate of lime and desulfurization effect are not obviously improved.In order to improve the utilization rate of lime, unreacted lime needs to be returned to tower body, which requires to configure a complex fly ash collection and conveying system at the outlet of dust collector hopper, resulting in the increase of energy consumption and the increase of maintenance burden. SUMMARY

[0003] The utility model solves the technical problems that: overcome the deficiency in the prior art, provide a kind of dry desulfurization reaction tower.The utility model utilizes flue gas, and the dust of heavier is adhered to flue wall board along tangent direction under the action of centrifugal force under elbow, under the stratification of gas-solid separation baffle, into dust collection pipe, again through star type airlock valve into return pipe, finally returns dry desulfurization reaction tower, and reacts with acidic gas in flue gas again, improves the utilization rate of lime and desulfurization effect.

[0004] The utility model solves the technical problems and adopts the technical scheme that:

[0005] A kind of dry desulfurization reaction tower, with tower body, the tower body one end is the import flue of collecting flue gas, and the tower body other end is outlet flue;The outlet flue is 1 / 4 circular bend pipe, and the lower surface of outlet flue is equipped with opening, and opening is equipped with dust collection pipe, and dust collection pipe is located below outlet flue;The dust collection pipe is connected with return pipe, and return pipe is communicated with tower body, and tower body is equipped with lime injection port;

[0006] The dust collection pipe includes tangent pipe and vertical pipe connected, and tangent pipe is arranged along the tangent direction of the midpoint of the contour line of outlet flue;

[0007] The opening is also equipped with gas-solid separation baffle, and gas-solid separation baffle is arranged obliquely, and gas-solid separation baffle is located in the inner chamber of outlet flue, and the inner chamber of outlet flue is separated into dust channel and flue gas channel, and dust channel is communicated with tangent pipe, and flue gas channel is communicated with the outlet end of outlet flue.

[0008] Further, the gas-solid separation baffle is 1 / 8 circular arc plate.

[0009] Further, the gas-solid separation baffle, the gas-solid separation baffle three edges are connected with the inner wall of the outlet flue, and the remaining one edge of the gas-solid separation baffle exceeds the opening.

[0010] Further, the tower body comprises a vertical parallelly arranged straight section rising tower body and a straight section falling tower body, a rotary flue for turning the upward flue gas into downward flue gas is connected between the upper end of the straight section rising tower body and the upper end of the straight section falling tower body;

[0011] The straight section rising tower body is connected with a venturi pipe, and the other end of the venturi pipe is connected with the inlet flue;

[0012] The straight section falling tower body is connected with the outlet flue, and the vertical pipe is provided with a star-shaped air locking valve.

[0013] Further, the venturi pipe comprises an inlet, a converging section, a throat and a diffuser section connected in sequence, the inlet is communicated with the inlet flue, the return pipe is communicated with the diffuser section, and the lime injection inlet is arranged on the diffuser section.

[0014] Further, a square-to-circle joint is further included, and the square-to-circle joint is located between the rotary flue and the straight section falling tower body.

[0015] Further, a manual plug valve is further included, and the manual plug valve is arranged on the vertical pipe and located above the star-shaped air locking valve.

[0016] The utility model discloses the beneficial effect is:

[0017] (1), be equipped with gas-solid separation baffle, and the dust of heavier is along tangent direction by flue wallboard under the action of centrifugal force, enters tangent pipe from dust channel, passes through star-shaped air locking valve and enters return pipe finally, returns dry desulfurization reaction tower again, and the acid gas in flue gas is reacted again, and the utilization rate of lime and desulfurization effect are further improved.

[0018] (2), the utility model discloses simple structure, replaces the dust collection system and return conveying system of installation at the outlet of bag-type dust collector ash bucket in prior art, reduces energy consumption and is convenient for overhauling. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0020] Figure 1 It is the structural schematic diagram of the utility model;

[0021] Figure 2 is the installation schematic diagram of the outlet flue, the gas-solid separation baffle and the tangent pipe.

[0022] In the figure: 1. Venturi tube, 2. Straight section rising tower body, 3. Rotary flue, 4. Square-to-round joint, 5. Straight section falling tower body, 6. Outlet flue, 7. Gas-solid separation baffle, 8. Dust collection pipe, 9. Manual gate valve, 10. Star-shaped air lock valve, 11. Return pipe, 12. Lime injection port, 13. Inlet flue, 14. Bell mouth pipe, 81. Tangent pipe, 82. Vertical pipe. DETAILED DESCRIPTION

[0023] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0024] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0025] The technical solutions of the present application will be described clearly and completely below in conjunction with embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] As shown in Figure 1 and Figure 2 A dry desulfurization reaction tower, which has a tower body, an inlet flue 13 for collecting flue gas at one end of the tower body, and an outlet flue 6 at the other end of the tower body; the outlet flue 6 is a 1 / 4 circular bend pipe, and an opening is provided on the lower surface of the outlet flue 6, and a dust collection pipe 8 is installed at the opening, and the dust collection pipe 8 is located below the outlet flue 6; the dust collection pipe 8 is connected with a return pipe 11, the return pipe 11 communicates with the tower body, and the tower body is provided with a lime injection port 12; the dust collection pipe 8 comprises a tangent pipe 81 and a vertical pipe 82 which are connected, and the tangent pipe 81 is arranged along the tangent direction of the midpoint of the outer contour line of the outlet flue 6; an inclined gas-solid separation baffle 7 is also installed at the opening, and the gas-solid separation baffle 7 is located in the inner cavity of the outlet flue 6, and divides the inner cavity of the outlet flue 6 into a dust passage and a flue gas passage, the dust passage communicates with the tangent pipe 81, and the flue gas passage communicates with the outlet end of the outlet flue 6.

[0027] The gas-solid separation partition plate 7 is a 1 / 8 circular arc plate.

[0028] In the gas-solid separation partition plate 7, three edges of the gas-solid separation partition plate 7 are connected with the inner wall of the outlet flue 6, and the remaining one edge of the gas-solid separation partition plate 7 is arranged beyond the opening.

[0029] The tower body comprises a straight section ascending tower body 2 and a straight section descending tower body 5 arranged vertically in parallel, a rotary flue 3 connected between the upper end of the straight section ascending tower body 2 and the upper end of the straight section descending tower body 5 for turning the upward flue gas into downward flue gas, a Venturi tube 1 connected with the lower end of the straight section ascending tower body 2, the other end of the Venturi tube 1 connected with the inlet flue 13, the lower end of the straight section descending tower body 5 connected with the outlet flue 6, and a star-shaped air locking valve 10 installed on the vertical pipe 82.

[0030] The Venturi tube 1 comprises an inlet, a converging section, a throat and a diffuser section connected in sequence, the inlet communicated with the inlet flue 13, the return pipe 11 communicated with the diffuser section, and the lime injection port 12 installed on the diffuser section.

[0031] The dry desulfurization reaction tower further comprises a square-to-circular joint 4 located between the rotary flue 3 and the straight section descending tower body 5, and a manual plug valve 9 installed on the vertical pipe 82 and located above the star-shaped air locking valve 10.

[0032] The specific working process of the dry desulfurization reaction tower is as follows: the flue gas enters the tower body through the inlet flue 13, the fresh lime is injected into the lime injection port 12, the fresh lime dust reacts with the acid gas in the flue gas to achieve desulfurization, the lime dust and the flue gas pass through the straight section ascending tower body 2, the rotary flue 3, the square-to-circular joint 4 and the straight section descending tower body 5 in sequence, and then enter the outlet flue 6, since the outlet flue 6 is a 1 / 4 circular bend pipe, the density of the lime dust and the flue gas is inconsistent, the heavier dust adheres to the flue wall plate along the tangent direction under the action of centrifugal force, enters the tangent pipe 81 through the dust passage under the layering effect of the gas-solid separation partition plate 7, enters the return pipe 11 through the star-shaped air locking valve 10, and finally returns to the dry desulfurization reaction tower to react with the acid gas in the flue gas again, thereby improving the utilization rate of lime and the desulfurization effect, and the separated flue gas is discharged through the outlet flue 6.

[0033] As described above, the dry desulfurization reaction tower has the following advantages:

[0034] (1) The gas-solid separation partition plate 7 is arranged, the heavier dust adheres to the flue wall plate along the tangent direction under the action of centrifugal force, enters the tangent pipe 81 through the dust passage, enters the return pipe 11 through the star-shaped air locking valve 10, and finally returns to the dry desulfurization reaction tower to react with the acid gas in the flue gas again, thereby improving the utilization rate of lime and the desulfurization effect;

[0035] (2), the utility model discloses simple structure replaces the dust collection system and the material returning conveying system of installing at the cloth bag dust collector ash bucket outlet in the prior art, reduces energy consumption and is convenient to overhaul.

[0036] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A dry desulfurization reaction tower, characterized in that: The invention comprises a tower body, one end of the tower body is an inlet flue (13) for collecting flue gas, and the other end of the tower body is an outlet flue (6); the outlet flue (6) is a 1 / 4 circular elbow, the lower surface of the outlet flue (6) is provided with an opening, a dust collection pipe (8) is installed at the opening, and the dust collection pipe (8) is located below the outlet flue (6); the dust collection pipe (8) is connected to a return pipe (11), the return pipe (11) is communicated with the tower body, and the tower body is provided with a lime injection port (12); The dust collection pipe (8) comprises a tangential pipe (81) and a vertical pipe (82) which are connected and arranged, and the tangential pipe (81) is arranged along the tangent direction of the midpoint of the outer contour line of the outlet flue (6); The opening is also provided with an inclined gas-solid separation partition (7), which is located in the inner cavity of the outlet flue (6) and divides the inner cavity of the outlet flue (6) into a dust channel and a smoke channel, wherein the dust channel is connected to the tangential pipe (81), and the smoke channel is connected to the outlet end of the outlet flue (6).

2. A dry desulfurization reaction tower according to claim 1, characterized in that: The gas-solid separation partition (7) is a 1 / 8 arc plate.

3. A dry desulfurization reaction tower according to claim 1 or 2, characterized in that: In the gas-solid separation partition (7), three edges of the gas-solid separation partition (7) are connected to the inner wall of the outlet flue (6), and the remaining edge of the gas-solid separation partition (7) is arranged beyond the opening.

4. A dry desulfurization reaction tower according to claim 1, 2 or 3, characterized in that: The tower body comprises a straight ascending tower body (2) and a straight descending tower body (5) arranged vertically and in parallel, and a rotary flue (3) for turning ascending flue gas into descending flue gas is connected between the upper ends of the straight ascending tower body (2) and the upper ends of the straight descending tower body (5); The lower end of the straight section rising tower body (2) is connected to a venturi tube (1), and the other end of the venturi tube (1) is connected to an inlet flue (13); The lower end of the straight descending tower body (5) is connected to the outlet flue (6); a star-shaped air lock valve (10) is installed on the vertical pipe (82).

5. A dry desulfurization reaction tower according to claim 4, characterized in that: The venturi tube (1) comprises an inlet, a contraction section, a throat and a diffusion section connected in sequence, wherein the inlet is connected to the inlet flue (13), the return pipe (11) is connected to the diffusion section, and the lime injection port (12) is installed in the diffusion section.

6. A dry desulfurization reaction tower according to claim 4, characterized in that: It also includes a square-to-circle joint (4), which is located between the rotary flue (3) and the straight-section descending tower body (5).

7. A dry desulfurization reaction tower according to claim 4, characterized in that: The utility model further comprises a manual gate valve (9), which is installed on the vertical pipe (82) and is located above the star-shaped air lock valve (10).

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