Environment-friendly shaft kiln flue gas carbon dioxide high-efficiency absorption equipment

Abstract

Environment-friendly shaft kiln flue gas carbon dioxide high-efficiency absorption equipment comprises a trapping tower filled with trapping liquid, the upper portion of the trapping tower is provided with a liquid inlet allowing the trapping liquid to enter the trapping tower and an exhaust port allowing gas to be exhausted, and the bottom of the trapping tower is coaxially and rotationally provided with a gas injection disc with a gas collection cavity. According to the utility model, the flue gas ascends in a spiral manner, so that the retention time of the flue gas in the trapping liquid is prolonged, the carbon dioxide and the trapping liquid are enabled to fully react, and the trapping effect of the carbon dioxide is improved. And the capture rate of carbon dioxide is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental protection vertical kiln flue gas carbon dioxide tower purification technical field, specifically a kind of environmental protection vertical kiln flue gas carbon dioxide high-efficiency absorption equipment. BACKGROUND

[0002] In prior art, vertical kiln is the high-efficiency, energy-saving and environmental protection equipment for burning quicklime, and the main raw material for producing quicklime is limestone, i.e. limestone is placed in vertical kiln for calcination, calcium carbonate in limestone is decomposed into quicklime and carbon dioxide, so that the flue gas discharged from vertical kiln contains a large amount of carbon dioxide, in prior art, capture liquid is used to capture carbon dioxide in flue gas, i.e. capture liquid is placed in capture tower, flue gas enters from the bottom of capture tower and passes through capture liquid from bottom to top, and the gas after passing through capture liquid is discharged from outlet, when capture tower processes flue gas for a period of time, capture liquid is discharged from capture tower and pure carbon dioxide is obtained by heating and decomposition. However, the residence time of flue gas in capture liquid is short, and the capture rate of carbon dioxide is low. SUMMARY

[0003] In order to solve the problem of low capture rate caused by short residence time of flue gas in capture liquid in prior art, the utility model provides a kind of environmental protection vertical kiln flue gas carbon dioxide high-efficiency absorption equipment, flue gas rises spirally, which increases the residence time of flue gas in capture liquid, makes carbon dioxide fully react with capture liquid, and improves the capture rate of carbon dioxide.

[0004] In order to achieve the above purpose, the utility model adopts the following specific scheme: a kind of environmental protection vertical kiln flue gas carbon dioxide high-efficiency absorption equipment, including capture tower filled with capture liquid, liquid inlet for capture liquid to enter capture tower and gas outlet for gas to be discharged are formed in the upper part of capture tower, characterized in that: gas injection disc with gas collection cavity is coaxially arranged at the bottom of capture tower, gas injection hole for connecting gas collection cavity and inner cavity of capture tower is formed in gas injection disc, flue gas is injected into inner cavity of capture tower through gas injection disc and forms multiple spiral rising bubble streams.

[0005] As an optimization scheme of the above-mentioned environmental protection vertical kiln flue gas carbon dioxide high-efficiency absorption equipment: gas inlet pipeline is coaxially and vertically arranged below the gas injection disc, and the gas inlet pipeline has a gas passage in the center position, which is in communication with the gas collection cavity.

[0006] As another optimization scheme of the above-mentioned environmental protection vertical kiln flue gas carbon dioxide high-efficiency absorption equipment: the top end of the gas inlet pipeline is fixedly connected with the gas injection disc, and a driving motor is arranged outside the capture tower for driving the gas inlet pipeline to rotate.

[0007] As another optimization scheme of the above-mentioned environment-friendly vertical kiln flue gas carbon dioxide high-efficiency absorption equipment, the jet disc comprises a top plate and a bottom plate, the top plate and the bottom plate are connected through an annular plate, and the top plate, the bottom plate and the annular plate form a gas collecting cavity.

[0008] As another optimization scheme of the above-mentioned environment-friendly vertical kiln flue gas carbon dioxide high-efficiency absorption equipment, the jet holes are arranged on the top plate and are divided into multiple groups, the jet holes in each group are distributed along the circumference of the top plate.

[0009] As another optimization scheme of the above-mentioned environment-friendly vertical kiln flue gas carbon dioxide high-efficiency absorption equipment, the jet holes are arranged in an inclined mode, and the acute angle formed by the axis of the jet holes and the vertical direction is 15-60°.

[0010] As another optimization scheme of the above-mentioned environment-friendly vertical kiln flue gas carbon dioxide high-efficiency absorption equipment, the top plate is divided into a first jet area and a second jet area by a vertical plane perpendicular to the central position of the top plate, and the jet holes in the first jet area are symmetrical to the jet holes in the second jet area.

[0011] As another optimization scheme of the above-mentioned environment-friendly vertical kiln flue gas carbon dioxide high-efficiency absorption equipment, an adsorption layer for adsorbing the capture liquid in the escaped gas is arranged in the capture tower, and the adsorption layer is located above the liquid inlet.

[0012] As another optimization scheme of the above-mentioned environment-friendly vertical kiln flue gas carbon dioxide high-efficiency absorption equipment, the adsorption layer comprises two horizontally arranged support plates, the edges of the support plates are sealingly connected with the inner side wall of the capture tower, and an adsorption material is arranged between the two support plates.

[0013] As another optimization scheme of the above-mentioned environment-friendly vertical kiln flue gas carbon dioxide high-efficiency absorption equipment, a plurality of jet pipes in communication with the gas collecting cavity and having a closed top end are vertically arranged on the jet disc, and the jet holes are arranged on the jet pipes.

[0014] Compared with the prior art, the environment-friendly vertical kiln flue gas carbon dioxide high-efficiency absorption equipment has the following beneficial effects:

[0015] 1. The environment-friendly vertical kiln flue gas carbon dioxide high-efficiency absorption equipment provided by the present application is characterized in that the flue gas is sprayed out of the jet holes of the jet disc, the jet disc is arranged in a rotating mode, so that the flue gas has a tangential velocity when being sprayed out, and the sprayed flue gas passes through the capture liquid in a spiral mode from bottom to top, thereby prolonging the residence time of the flue gas in the capture liquid, improving the reaction between the carbon dioxide and the capture liquid, and improving the capture rate of the carbon dioxide.

[0016] 2. In the present application, the rotation of the jet disc causes slight flow of the capture liquid, thereby enhancing the turbulence degree of the capture liquid and improving the uniformity of the capture liquid.

[0017] 3. In this utility model, after the flue gas is ejected, bubbles are formed in the collecting liquid. The inclined jet hole causes some bubbles to collide with the side wall of the collecting tower during their spiral ascent, thereby breaking the bubbles and changing their direction of movement. This increases the contact area between the bubbles and the collecting liquid and further extends the residence time of the flue gas in the collecting liquid, thereby further improving the carbon dioxide capture rate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the jet nozzle in Example 2;

[0020] Figure 3 This is a schematic diagram of the jet pipe structure;

[0021] Reference numerals in the attached drawings: 1. Collection tower; 101. Tower cover; 102. Liquid inlet; 103. Exhaust outlet; 2. Jet plate; 201. Top plate; 202. Jet hole; 203. Jet pipe; 3. Gas collection chamber; 4. Gas inlet pipe; 401. Gas passage; 402. Baffle; 5. Drive motor; 501. Drive gear; 502. Driven gear; 6. Adsorption layer. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art, such as the installation of the intake pipe 4 and the exhaust pipe, and how the flue gas enters the intake pipe 4.

[0023] Example 1

[0024] An environmentally friendly vertical kiln flue gas carbon dioxide high-efficiency absorption device includes a collection tower 1 filled with a collection liquid. The collection tower 1 has an inlet 102 for the collection liquid to enter and an exhaust port 103 for gas discharge. In this embodiment, the collection tower 1 includes a tower body with an open top and a tower cover 101 for sealing the top opening. The tower body and tower cover 101 are fixedly and sealed together, giving the collection tower 1 a closed inner cavity. The exhaust port 103 is located at the center of the tower cover 101, and the inlet 102 is located at the top of the tower body. A jet disk 2 with a gas collection chamber 3 is coaxially rotatably mounted at the bottom of the collection tower 1. The jet disk 2 has jet holes 202 for connecting the gas collection chamber 3 and the inner cavity of the collection tower 1. Flue gas is injected into the inner cavity of the collection tower 1 through the jet disk 2, forming multiple spiraling upward bubble streams. When the flue gas is ejected from the jet disk 2, it has a tangential velocity, and after the flue gas enters the collecting liquid, it forms bubbles. That is, the bubble flow formed by the flue gas spirals from bottom to top through the collecting liquid, which increases the residence time of the flue gas in the collecting liquid, allowing the carbon dioxide to react fully with the collecting liquid and improving the carbon dioxide collection rate.

[0025] The air injection disc 2 comprises a top plate 201 and a bottom plate which are parallel to each other, the top plate 201 and the bottom plate are both circular plate structures and have the same diameter, the axes of the top plate 201 and the bottom plate are coincident with the axis of the collection tower 1, there is a clearance between the edges of the top plate 201 and the bottom plate and the inner side wall of the collection tower 1, so that the air injection disc 2 can rotate in the collection tower 1; the top plate 201 and the bottom plate are connected through an annular plate, the top end of the annular plate is sealingly and fixedly connected with the top plate 201, the bottom end of the annular plate is sealingly and fixedly connected with the bottom plate, and the outer diameter of the annular plate is equal to the diameter of the top plate 201, so that the top plate 201, the bottom plate and the annular plate form the gas collection cavity 3. In the embodiment, the air injection holes 202 are arranged on the top plate 201 and are divided into multiple groups, the air injection holes 202 in each group are distributed along the radial direction of the top plate 201, and the air injection holes 202 in each group are distributed along the circumferential direction of the top plate 201.

[0026] The air injection disc 2 is connected with the collection tower 1 through the air inlet pipeline 4, specifically, the air injection disc 2 is coaxially and vertically provided below the air inlet pipeline 4, the air inlet pipeline 4 has a gas passage 401 at the center position which is communicated with the gas collection cavity 3, and the air injection disc 2 is rotationally connected or fixedly connected with the air inlet pipeline 4, in the embodiment, the air injection disc 2 is fixedly connected with the air inlet pipeline 4. The bottom plate of the air injection disc 2 is provided with a connecting hole, the top end of the air inlet pipeline 4 extends into the connecting hole, and the inner side wall of the air inlet pipeline 4 is sealingly connected with the inner side wall of the connecting hole; the bottom end of the collection tower 1 is provided with a mounting hole, and the outer side wall of the air inlet pipeline 4 is rotationally and sealingly connected with the mounting hole, that is, the bottom end of the air inlet pipeline 4 extends out of the collection tower 1 and is connected with the flue gas discharge pipeline in the environment-friendly vertical kiln through a rotary joint.

[0027] A driving motor 5 is arranged outside the collection tower 1 and is used for driving the air inlet pipeline 4 to rotate, specifically, a driven gear 502 is coaxially and fixedly connected with the outer side wall of the air inlet pipeline 4 which extends out of the collection tower 1, and the driving motor 5 is drivingly connected with a driving gear 501 which is engaged with the driven gear 502, that is, the driving motor 5 drives the driving gear 501 to drive the transmission gear to rotate, and then drives the air injection disc 2 to rotate, so that the flue gas in the gas collection cavity 3 has a tangential velocity when being injected into the collection tower 1.

[0028] The rotation of the air injection disc 2 can cause slight flow of the collection liquid, so as to enhance the turbulence degree of the collection liquid and improve the uniformity of the collection liquid.

[0029] The above is the basic implementation manner of the utility model, and further improvement, optimization and limitation can be made on the basis, so as to obtain the following embodiments.

[0030] Embodiment 2

[0031] This embodiment is an improved scheme for a high-efficiency carbon dioxide absorption device for environmentally friendly vertical kiln flue gas, based on Embodiment 1. Its main structure is the same as Embodiment 1, with the improvement being that the jet nozzle 202 is inclined, and the acute angle formed by its axis and the vertical direction is 15-60°. In this embodiment, the acute angle formed by the axis of the jet nozzle 202 and the vertical direction is 60°. The top plate 201 is divided into a first jet zone and a second jet zone by a vertical plane perpendicular to its center. Figure 2 As shown, the left top plate 201 is the first jet zone, and the right top plate 201 is the second jet zone. The jet holes 202 of the first jet zone and the second jet zone are symmetrical, that is, the jet holes 202 of the first jet zone are inclined to the upper left, and the jet holes 202 of the second jet zone are inclined to the upper right. After the flue gas is ejected, bubbles are formed in the collection liquid. The inclined arrangement of the jet holes 202 causes some bubbles to collide with the side wall of the collection tower 1 during their spiral ascent, thereby breaking the bubbles and changing their direction of movement. This increases the contact area between the bubbles and the collection liquid and further extends the residence time of the flue gas in the collection liquid, thus further improving the carbon dioxide capture rate.

[0032] Example 3

[0033] This embodiment is an improved scheme for a high-efficiency carbon dioxide absorption device for environmentally friendly vertical kiln flue gas based on Embodiment 1. Its main structure is the same as that of Embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement scheme.] Figure 3 As shown, the trapping tower 1 is equipped with an adsorption layer 6 for adsorbing the trapping liquid in the escaping gas. The adsorption layer 6 is located above the liquid inlet 102. The adsorption layer 6 includes two horizontally arranged support plates. The edges of the support plates are sealed to the inner wall of the trapping tower 1. Adsorption material is placed between the two support plates. After the gas escapes the trapping liquid, it continues to move upward and passes through the adsorption layer 6 before being discharged from the trapping tower 1 through the exhaust port 103. When the gas escapes, it will carry some trapping liquid. The adsorption layer 6 is set to adsorb the trapping liquid carried by the gas, so as to avoid the gas carrying the trapping liquid out of the trapping tower 1 and causing waste of the trapping liquid.

[0034] Example 4

[0035] This embodiment is an improved scheme for a high-efficiency carbon dioxide absorption device for environmentally friendly vertical kiln flue gas based on Embodiment 1. Its main structure is the same as that of Embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement scheme.] Figure 3 As shown, multiple baffles 402 are provided on the inner wall of the air intake pipe 4. The baffles 402 are perpendicular to the axis of the air intake pipe 4, and the baffles 402 are evenly distributed in a staggered manner along the axial direction of the air intake pipe 4, forming a labyrinth-like air intake channel inside the air intake pipe 4. Impurities in the flue gas will accumulate when they encounter the guide plates, preventing impurities from entering the collection liquid and contaminating the collection liquid.

[0036] Example 5:

[0037] The embodiment is an improved scheme of the high-efficiency CO2 absorption equipment for the flue gas of the environmental protection shaft kiln, which is based on the embodiment 1, and the main structure is the same as that of the embodiment 1, and the improvement point is that a plurality of jet pipes 203, which are communicated with the gas collecting cavity 3 and have closed top ends, are vertically arranged on the jet disc 2, and the jet holes 202 are arranged on the jet pipes 203, in the embodiment, the jet holes 202 are arranged on the inner side walls of the jet pipes 203, and the jet holes 202 have small diameters, so that the flue gas forms small bubbles in the trapping liquid, the contact area of the CO2 and the trapping liquid is increased, and the CO2 trapping rate is further improved.

[0038] The above description of disclosed embodiments enables those skilled in the art to make or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An environment-friendly shaft kiln flue gas carbon dioxide high-efficiency absorption equipment, comprising a trapping tower (1) filled with trapping liquid, the upper part of the trapping tower (1) being provided with a liquid inlet (102) for the trapping liquid to enter the trapping tower (1) and a gas outlet (103) for discharging gas, characterized in that: The bottom of the capture tower (1) is coaxially provided with a gas injection disc (2) with a gas collecting cavity (3), the gas injection disc (2) is provided with gas injection holes (202) for connecting the gas collecting cavity (3) and the inner cavity of the capture tower (1), and the flue gas is injected into the inner cavity of the capture tower (1) through the gas injection disc (2) and forms a plurality of spiral upward bubble flows.

2. The environment-friendly shaft kiln flue gas CO2 high-efficiency absorption equipment according to claim 1, characterized in that: A gas inlet pipe (4) is coaxially and vertically arranged below the gas injection disc (2), and the gas inlet pipe (4) is provided with a gas passage (401) in the central position and connected with the gas collecting cavity (3).

3. The environment-friendly shaft kiln flue gas CO2 high-efficiency absorption equipment according to claim 2, characterized in that: The top end of the gas inlet pipe (4) is fixedly connected with the gas injection disc (2), and the capture tower (1) is externally provided with a driving motor (5) for driving the rotation of the gas inlet pipe (4).

4. The environment-friendly shaft kiln flue gas CO2 high-efficiency absorption equipment according to claim 1, characterized in that: The gas injection disc (2) comprises a top plate (201) and a bottom plate, and the top plate (201) and the bottom plate are connected through an annular plate, so that the top plate (201), the bottom plate and the annular plate form the gas collecting cavity (3).

5. The environment-friendly shaft kiln flue gas CO2 high-efficiency absorption equipment according to claim 4, characterized in that: The gas injection holes (202) are arranged on the top plate (201) and divided into a plurality of groups, the gas injection holes (202) in each group are distributed along the radial direction of the top plate (201), and the gas injection holes (202) in each group are distributed along the circumferential direction of the top plate (201).

6. The environment-friendly shaft kiln flue gas CO2 high-efficiency absorption equipment according to claim 5, characterized in that: The gas injection holes (202) are arranged obliquely, and the acute angle formed by the axis of the gas injection holes (202) and the vertical direction is 15-60°.

7. The environment-friendly shaft kiln flue gas CO2 high-efficiency absorption equipment according to claim 6, characterized in that: The top plate (201) is divided into a first gas injection area and a second gas injection area by a vertical plane perpendicular to the central position of the top plate (201), and the gas injection holes (202) in the first gas injection area are symmetrical to the gas injection holes (202) in the second gas injection area.

8. The environment-friendly shaft kiln flue gas CO2 high-efficiency absorption equipment according to claim 1, characterized in that: An adsorption layer (6) for adsorbing the capture liquid in the escaping gas is arranged in the capture tower (1), and the adsorption layer (6) is located above the liquid inlet (102).

9. The environment-friendly shaft kiln flue gas CO2 high-efficiency absorption equipment according to claim 8, characterized in that: The adsorption layer (6) comprises two horizontally arranged support plates, the edges of the support plates are sealingly connected with the inner side wall of the capture tower (1), and an adsorption material is arranged between the two support plates.

10. The environment-friendly shaft kiln flue gas CO2 high-efficiency absorption equipment according to claim 1, characterized in that: A plurality of gas injection pipes (203) are vertically arranged on the gas injection disc (2) and connected with the gas collecting cavity (3), and the top ends of the gas injection pipes (203) are closed. The gas injection holes (202) are arranged on the gas injection pipes (203).

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