Countercurrent spray tower for coal desulfurization

Abstract

The utility model relates to the technical field of coal desulfurization, and particularly discloses a countercurrent spray tower for coal desulfurization, which comprises a column foot and a column cover, the gas inlet pipe is fixed at the bottom of the outer side wall of the reaction tank; the gas return pipe is fixed at the top end of the gas inlet pipe; the gas outlet pipe is fixed at the top end of the reaction tank; the liquid collecting box is fixed at the top of the outer side wall of the reaction tank; the stirring structure is arranged at the bottom of the reaction tank, and the stirring structure is used for stirring reaction liquid at the bottom of the reaction tank. The contact area between the input gas and the reaction liquid at the bottom of the reaction tank can be increased, and the reaction efficiency is improved by firstly pre-reacting for one wave and then rising for spraying reaction.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal desulfurization technical field, concretely is a kind of for coal desulfurization's countercurrent spray tower. BACKGROUND

[0002] With the progress of the times, technology is developing constantly, coal is an important resource indispensable in life, and its use is widely used, and coal plays an important role in power generation, but sulfur compounds and other harmful gases are generated when coal is burned, and if directly discharged into the atmosphere, it will pollute the environment, so the flue gas after combustion is desulfurized to separate sulfur dioxide and other harmful substances in the flue gas, and then discharged into the atmosphere without polluting the environment, so it is particularly important to provide a countercurrent spray tower for coal desulfurization.

[0003] The utility model discloses a kind of for coal desulfurization's countercurrent spray tower in the patent with the publication number CN206454468U China utility model discloses a kind of for coal desulfurization's countercurrent spray tower, including cylindrical tower body, and the circulating slurry pool of tower body bottom conical, the inclined downward setting air inlet pipe is equipped on the tower body, and a row of spray heads is arranged in the air inlet pipe top along the axial direction;Tower body is sequentially arranged with slurry spray washing zone and demisting zone along the air inlet pipe top, from below;Tower body is also provided with smoke gas anti-escape structure, and the smoke gas anti-escape structure is annular ring with width 20-30cm, annular ring has the size matched with the inner diameter of tower body, the outer peripheral wall of annular ring is welded with the inner wall of tower body, and the air inlet pipe top is located below slurry spray washing zone.The countercurrent spray tower provided by the utility model is simple in structure, convenient to operate, can effectively prevent smoke gas from escaping, and does not produce additional load, is suitable for magnesium method desulfurization or calcium method desulfurization, and can improve desulfurization efficiency by 3-5% on the basis of existing spray tower.

[0004] The countercurrent spray tower for coal desulfurization is convenient to use, can prevent smoke gas from escaping and improve desulfurization efficiency, but still has the following defects in actual use: the gas inlet is above the liquid level, the contact area of the gas and the spray liquid is not large enough, the reaction efficiency is reduced, and the spray pipe is generally designed in layers, so that the gas can only react at the spray point when rising, and the space inside the reaction box is wasted. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a countercurrent spray tower for coal desulfurization to solve the problems in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a countercurrent spray tower for coal desulfurization, which comprises a column foot, a reaction tank fixed to the top end of the column foot, an air inlet pipe fixed to the bottom of the outer side wall of the reaction tank, a gas return pipe fixed to the top end of the air inlet pipe, an air outlet pipe fixed to the top end of the reaction tank, a liquid collecting tank fixed to the top of the outer side wall of the reaction tank, and a servo motor fixedly installed at the middle position of the bottom end of the reaction tank.

[0007] A stirring structure is arranged at the bottom of the reaction tank, and the stirring structure is used for stirring the reaction liquid at the bottom of the reaction tank.

[0008] A spray structure is arranged on the inner side wall of the reaction tank, and the spray structure is used for spraying the gas inside the reaction tank.

[0009] Preferably, the top end of the reaction tank is sequentially provided, from top to bottom, with a demister and a filler layer, the top end of the liquid collecting tank is fixedly provided with a through pipe, the through pipe is connected to the water inlet of the demister layer, the air inlet pipe, the gas return pipe and the air outlet pipe are in communication with each other, one-way air valves are fixedly installed at both ends of the gas return pipe, and the bottom end of the air outlet pipe is in communication with the reaction tank.

[0010] Preferably, a dosing structure is arranged below the liquid collecting tank, the dosing structure comprises a dosing tank fixed to the outer side wall of the reaction tank, a dosing pipe opening fixed to the top of the outer side wall of the dosing tank, and a plug cap snap-connected to the top end of the dosing pipe opening.

[0011] Preferably, a channel is connected between the dosing tank and the liquid collecting tank, and the dosing pipe opening is inclined.

[0012] Preferably, the stirring structure comprises a main rotating shaft arranged in the reaction tank, side stirring rods fixed to the outer side wall of the main rotating shaft, and a connecting head fixedly connected to one end of the air inlet pipe.

[0013] Preferably, the output shaft of the servo motor extends to the bottom of the reaction tank and is fixedly connected with the main rotating shaft, the main rotating shaft and the connecting head are rotationally connected, one-way air valves are fixedly installed at the connection between the connecting head and the air inlet pipe, air holes are formed in the two sides of the main rotating shaft, a through pipe is formed in the inside of the side stirring rods, more fine air holes are uniformly formed in the outer side wall of the side stirring rods, and the outer diameter of the air hole in the top end of the main rotating shaft is equal to the outer diameter of the air hole on the side of the connecting head close to the air inlet pipe.

[0014] Preferably, the spray structure comprises a spray pipe fixedly installed on the inner side wall of the reaction tank, spray heads fixed to the outer side wall of the spray pipe, and a liquid suction pipe fixedly connected to the bottom end of the spray pipe.

[0015] Preferably, the spray pipe is spiral-shaped, and the bottom end of the liquid suction pipe extends to the bottom of the reaction liquid at the bottom of the reaction tank.

[0016] The utility model has at least the following beneficial effects:

[0017] 1、 Through setting up stirring structure, through main rotary lever, side stirring lever and connecting head cooperation air inlet pipe and servo motor, can make the input gas can increase and the contact area of reaction liquid of reaction tank bottom, first pre-reaction a wave and then rise and carry out spray reaction, make the reaction efficiency has improved.

[0018] 2、 Through setting up spray structure, spray pipe, spray head and dipper tube are in the inside wall of reaction tank, spray to the gas that rises, because spray pipe is helical, make the vertical space coverage of spray is more full, make the ascending velocity of airflow also can obtain slow down, like this can make the reaction more fully.

[0019] 3、 Through setting up dosing structure, because dosing box, dosing pipe and plug are in the outside wall of reaction tank, make when needing to add medicine to internal reaction liquid, can be more convenient, and can cooperate the water in liquid collecting tank to flush the medicine powder in dosing box, make the medicine powder can be flushed into reaction tank completely. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is three-dimensional structure diagram of the utility model;

[0021] Figure 2 It is front view three-dimensional drawing of the utility model;

[0022] Figure 3 It is side view three-dimensional drawing of the utility model;

[0023] Figure 4 It is stirring structure section view close-up of the utility model;

[0024] Figure 5 It is the utility model Figure 2 A place close-up of the utility model.

[0025] In the drawing: 1, column foot;2, reaction tank;3, air inlet pipe;4, return air pipe;5, air outlet pipe;6, liquid collecting tank;7, dosing structure;701, dosing box;702, dosing pipe;703, plug;8, servo motor;9, stirring structure;901, main rotary lever;902, side stirring lever;903, connecting head;10, spray structure;1001, spray pipe;1002, spray head;1003, dipper tube. DETAILED DESCRIPTION

[0026] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0027] Please refer to Figures 1-5 The present application provides a technical scheme:

[0028] Embodiment one,

[0029] A countercurrent spray tower for coal desulfurization, comprising a column foot 1, a reaction tank 2 fixed to the top end of the column foot 1, an air inlet pipe 3, a gas return pipe 4 and an air outlet pipe 5 fixed to the outer side wall of the reaction tank 2 respectively, a liquid collecting tank 6 fixed to the top of the outer side wall of the reaction tank 2 and a servo motor 8 fixedly installed at the middle position of the bottom end of the reaction tank 2, a stirring structure 9 is arranged at the middle position of the bottom end of the reaction tank 2, and the stirring structure 9 is used for stirring the reaction liquid at the bottom of the reaction tank 2.

[0030] Wherein, the top end of the reaction tank 2 is sequentially provided with a demister and a filler layer from top to bottom, the air inlet pipe 3, the gas return pipe 4 and the air outlet pipe 5 are communicated with each other, the two ends of the gas return pipe 4 are fixedly provided with a one-way air valve, the bottom end of the air outlet pipe 5 is communicated with the reaction tank 2, so that the gas can only enter the reaction tank 2 from the air inlet pipe 3 and then be discharged through the air outlet pipe 5 or return to the air inlet pipe 3 through the gas return pipe 4 and then be recycled, the top end of the liquid collecting tank 6 is fixedly provided with a pipe and a water inlet connected with the demisting layer, and the liquid of the demisting layer is introduced back to the inside of the liquid collecting tank 6 for storage.

[0031] In addition, the stirring structure 9 comprises a main rotating rod 901 arranged in the reaction tank 2, a side stirring rod 902 fixed to the outer side wall of the main rotating rod 901 and a connecting head 903 fixedly connected with one end of the air inlet pipe 3, the output shaft of the servo motor 8 extends to the bottom of the reaction tank 2 and is fixedly connected with the main rotating rod 901, the main rotating rod 901 and the connecting head 903 are rotationally connected, and a one-way air valve is fixedly installed at the connection between the connecting head 903 and the air inlet pipe 3, so that the gas entering the air inlet pipe 3 can only be input into the main rotating rod 901 and the side stirring rod 902 in one direction.

[0032] When the flue gas needs to be sprayed and purified, the servo motor 8 is started to drive the top main rotating rod 901 to rotate. At this time, the gas in the air inlet pipe 3 enters the connecting head 903. When the main rotating rod 901 and the connecting head 903 are connected, the gas enters the main rotating rod 901 and then rushes into the side stirring rod 902 through the air hole of the side stirring rod 902 and then rushes into the reaction liquid at the bottom end of the reaction tank 2 to react and then continue to rise and be sprayed. The effect of pre-reaction can be achieved. Moreover, the side stirring rod 902 stirs the reaction liquid at the bottom end of the reaction tank 2, so that the gas can more fully contact the reaction liquid for reaction.

[0033] According to the above embodiment, embodiment two,

[0034] It should be noted that the spraying structure 10 is arranged on the inner side wall of the reaction tank 2. The spraying structure 10 is used for spraying the gas in the reaction tank 2. The spraying structure 10 comprises a spraying pipe 1001 fixedly installed on the inner side wall of the reaction tank 2, a spray head 1002 fixedly installed on the outer side wall of the spraying pipe 1001, and a liquid suction pipe 1003 fixedly connected to the bottom end of the spraying pipe 1001.

[0035] The spraying pipe 1001 is in a spiral shape, so that the area distributed by the spray head 1002 when spraying is more extensive. The bottom end of the liquid suction pipe 1003 extends to the bottom of the reaction liquid at the bottom of the reaction tank 2, so that the liquid suction pipe 1003 can continuously output the reaction liquid to the spraying pipe 1001.

[0036] After the gas reacts at the bottom of the reaction tank 2 through the side stirring rod 902 and then rises, the liquid suction pipe 1003 extracts the reaction liquid at the bottom of the reaction tank 2 and then sprays it out from the spray head 1002 through the spraying pipe 1001, so that the rising gas can react with the gas sprayed from the spray head 1002. Since the spraying pipe 1001 is in a spiral shape, the liquid sprayed from the spray head 1002 can be more densely distributed in the reaction tank 2. In this way, not only can the rising gas and the reaction liquid have a larger contact area and the reaction be more sufficient, but also the rising speed of the gas can be temporarily blocked, the residence time of the flue gas in the reaction tank 2 is improved, and the flue gas can be completely purified by the sprayed liquid.

[0037] According to the above embodiment, embodiment three,

[0038] It should be noted that the liquid collecting tank 6 is provided below the dosing structure 7. The dosing structure 7 comprises a dosing tank 701 fixedly installed on the outer side wall of the reaction tank 2, a dosing pipe opening 702 fixedly installed on the top of the outer side wall of the dosing tank 701, and a plug cover 703 clampedly connected to the top end of the dosing pipe opening 702. A channel is connected between the dosing tank 701 and the liquid collecting tank 6. The dosing pipe opening 702 is in an inclined shape.

[0039] When the internal components of the reaction solution are reduced after the reaction, the reaction rate will be reduced, at this time, the plug cover 703 is opened, the medicine is added from the medicine adding pipe 702 on the side of the medicine adding tank 701, after the addition, the pipe connecting the liquid collecting tank 6 and the medicine adding structure 7 is opened, so that the liquid on the top of the liquid collecting tank 6 can flush the medicine in the medicine adding tank 701, and carry it into the reaction tank 2, and the main rotating rod 901 and the side stirring rod 902 in the reaction tank 2 can mix the medicine powder flushed from the medicine adding tank 701 in the reaction solution more quickly and uniformly, so that the concentration of the reaction solution is improved, and the reaction rate is faster.

[0040] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0041] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A countercurrent spray tower for coal desulfurization, comprising: a column foot (1), a reaction tank (2) fixed to the top end of the column foot (1), an air inlet pipe (3) fixed to the bottom of the outer side wall of the reaction tank (2), an air return pipe (4) fixed to the top end of the air inlet pipe (3), an air outlet pipe (5) fixed to the top end of the reaction tank (2), a liquid collecting tank (6) fixed to the top of the outer side wall of the reaction tank (2), and a servo motor (8) fixedly installed at the middle position of the bottom end of the reaction tank (2); characterized in that it further comprises: a stirring structure (9) arranged at the bottom of the reaction tank (2), which is used for stirring the reaction liquid inside the reaction tank (2); a spraying structure (10) arranged on the inner side wall of the reaction tank (2), which is used for spraying gas inside the reaction tank (2).

2. A countercurrent spray tower for desulphurization of coal as claimed in claim 1 wherein: The top end of the reaction tank (2) is sequentially provided with a demister and a filler layer from top to bottom, the top end of the liquid collecting tank (6) is fixedly provided with a through pipe, the through pipe is connected to the water inlet of the demisting layer, the air inlet pipe (3), the air return pipe (4) and the air outlet pipe (5) are connected to each other, one-way air valves are fixedly installed at both ends of the air return pipe (4), and the bottom end of the air outlet pipe (5) is connected to the reaction tank (2).

3. A countercurrent spray tower for desulfurization of coal according to claim 1, characterized in that: A dosing structure (7) is arranged below the liquid collecting tank (6), the dosing structure (7) comprises a dosing tank (701) fixed to the outer side wall of the reaction tank (2), a dosing pipe opening (702) fixed to the top of the outer side wall of the dosing tank (701), and a plug (703) snap-connected to the top end of the dosing pipe opening (702).

4. A counter current spray tower for desulphurisation of coal as claimed in claim 3 wherein: A channel is connected between the dosing tank (701) and the liquid collecting tank (6), and the dosing pipe opening (702) is inclined.

5. A countercurrent spray tower for desulfurization of coal as claimed in claim 1 wherein: The stirring structure (9) comprises a main rotating shaft (901) arranged in the reaction tank (2), a side stirring rod (902) fixed to the outer side wall of the main rotating shaft (901), and a connecting head (903) fixedly connected to one end of the air inlet pipe (3).

6. A counter current spray tower for desulphurisation of coal as claimed in claim 5 wherein: The output shaft of the servo motor (8) extends to the bottom of the reaction tank (2) and is fixedly connected to the main rotating shaft (901), the main rotating shaft (901) and the connecting head (903) are rotationally connected, and a one-way air valve is fixedly installed at the connection between the connecting head (903) and the air inlet pipe (3).

7. A counter current spray tower for desulphurisation of coal as claimed in claim 1 wherein: The spraying structure (10) comprises a spraying pipe (1001) fixedly installed on the inner side wall of the reaction tank (2), a spray head (1002) fixed to the outer side wall of the spraying pipe (1001), and a liquid suction pipe (1003) fixedly connected to the bottom end of the spraying pipe (1001).

8. A counter current spray tower for desulphurisation of coal as claimed in claim 7 wherein: The spraying pipe (1001) is spiral-shaped, and the bottom end of the liquid suction pipe (1003) extends to the bottom of the reaction liquid at the bottom of the reaction tank (2).

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