Kiln tail gas treatment device and kiln tail gas treatment method

Abstract

The present disclosure relates to the field of tail gas treatment, and provides a kiln tail gas treatment equipment and a kiln tail gas treatment method, wherein the kiln tail gas treatment equipment comprises a gas inlet structure (30), a first treatment structure (20), a second treatment structure (50), a third treatment structure (70) and a gas outlet structure (80) which are sequentially connected, the first treatment structure (20) is provided with a filter assembly for filtering tail gas, the second treatment structure (50) can add limestone and / or brucite to absorb and treat the tail gas, and the third treatment structure (70) can spray sodium alkali solution to spray and treat the tail gas. Through the above technical scheme, the preliminary treatment effect is achieved through filtering, the harmful gas in the tail gas can be adsorbed through limestone and / or brucite, the treatment performance of the tail gas can be better guaranteed, the tail gas is further treated through spraying in the third treatment structure, the tail gas treatment effect is further improved, and the overall structure is relatively simple and has higher practicality.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of tail gas treatment, and particularly relates to a kiln tail gas treatment device and a kiln tail gas treatment method. BACKGROUND

[0002] The tail gas treatment device is used to effectively treat the toxic and harmful substances contained in the tail gas to below the specified concentration, and should avoid the occurrence of adverse phenomena such as corrosion or blockage of the device. Under the impetus of the construction of a green and energy-saving society, people's expectations and pursuit of the green production process of ceramics are increasingly improved, and various methods and devices are used to ensure that the production process produces as little pollution as possible or no pollution.

[0003] During the production process, a large amount of sulfur compounds, fluorine compounds and oxygen-nitrogen compounds will be released due to the combustion of fuels such as natural gas, liquefied gas, coal gas, light diesel oil, heavy oil, coal, etc. These harmful tail gas will have a significant impact on the natural environment, causing natural disasters such as acid rain, and affecting the natural environment and human physical and mental health. SUMMARY

[0004] One of the technical problems to be solved by the present disclosure is to provide a device capable of effectively treating kiln tail gas.

[0005] To solve the above technical problems, the present disclosure provides a kiln tail gas treatment device, characterized by comprising an air inlet structure, a first treatment structure, a second treatment structure, a third treatment structure and an air outlet structure which are sequentially connected, a filter assembly for filtering tail gas is arranged in the first treatment structure, the second treatment structure can add limestone and / or brucite to absorb and treat the tail gas, and the third treatment structure can spray sodium base solution to spray and treat the tail gas.

[0006] In some embodiments, the first treatment structure comprises a first treatment tank body, a dispersion shell arranged in the first treatment tank body, and a filter screen arranged in the first treatment tank body and located on the upper side of the dispersion shell, the bottom of the dispersion shell is provided with an inlet communicated with the air inlet structure, and the top of the dispersion shell is provided with a plurality of first air outlet holes.

[0007] In some embodiments, the filter screen comprises a first filter screen, a second filter screen and a third filter screen which are arranged in a downward direction on the upper side of the dispersion shell, and the mesh number of the first filter screen, the second filter screen and the third filter screen increases in turn.

[0008] In some embodiments, the second processing structure comprises a second processing tank, a carrier net arranged in the second processing tank, and a carrier shell arranged in the second processing tank and located on the carrier net, wherein a bottom plate of the carrier shell is provided with a plurality of first air inlet holes and a top portion is provided with a second air outlet hole.

[0009] In some embodiments, the bottom plate of the carrier net and the carrier shell is arranged obliquely, a sidewall of the carrier shell is provided with a discharge pipe near a lowest point of the bottom plate, and an upper portion of the carrier shell is provided with a feeding pipe which is radially opposite to the discharge pipe.

[0010] In some embodiments, the third processing structure comprises a third processing tank, a downwardly directed spray head arranged in the third processing tank, a fan arranged in the third processing tank and located below the spray head, and a centrifugal fan arranged below the fan, wherein the spray head is capable of spraying a sodium alkali solution downwardly, the fan is capable of rotating to disperse the sodium alkali solution, and the centrifugal fan is capable of driving tail gas to rise along an inner wall of the third processing tank to contact the sodium alkali solution.

[0011] In some embodiments, the third processing structure comprises a partition plate with an edge sealingly engaged with the inner wall of the third processing tank, and an upper side of the partition plate is provided with a motor which is drivingly connected to the fan.

[0012] In some embodiments, the fan comprises a hollow rotating rod penetrating through the partition plate and a fan blade connected to the rotating rod, a portion of the rotating rod located below the partition plate is provided with a second air inlet hole, a portion of the rotating rod located above the partition plate is provided with a third air outlet hole, and the exhaust structure is connected to a portion of the third processing tank located above the partition plate.

[0013] In some embodiments, the third processing structure comprises a water supply main pipe located outside the third processing tank and a plurality of water supply branch pipes connected to the water supply main pipe and extending into the third processing tank, the spray head is connected to the water supply branch pipe, and the spray head is located below the partition plate.

[0014] In addition, embodiments of the present disclosure provide a kiln tail gas treatment method, wherein the kiln tail gas treatment device described in the above scheme is used.

[0015] Through the above technical scheme, the preliminary treatment effect is achieved through filtration, the harmful gas in the tail gas can be adsorbed by the limestone and / or brucite, which can better guarantee the treatment performance of the tail gas, the third processing structure further improves the tail gas treatment effect through spray treatment, and the overall structure is relatively simple and has higher practicability. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 The structural schematic diagram of the kiln tail gas treatment equipment.

[0018] Figure 2 The internal structure diagram of the kiln tail gas treatment equipment.

[0019] Figure 3 The front view of the kiln tail gas treatment equipment.

[0020] Figure 4 The top view of the kiln tail gas treatment equipment.

[0021] Figure 5 The side view of the kiln tail gas treatment equipment.

[0022] Figure 6 The top view of the dispersion shell.

[0023] Explanation of reference signs:

[0024] Support base 10, first processing structure 20, gas inlet structure 30, first conveying structure 40, second processing structure 50, second conveying structure 60, third processing structure 70, discharge structure 80, controller 90, electrical interface 100;

[0025] Horizontal support plate 11, vertical support plate 12;

[0026] First processing tank body 21, dispersion shell 22, first filter screen 23, second filter screen 24, third filter screen 25;

[0027] Gas inlet pipeline 31;

[0028] First conveying pipeline 41, first air feeding fan 42;

[0029] Second processing tank body 51, first connecting head 52, bearing shell 53, bearing screen 54, feeding pipeline 55, first sealing cover 56, discharging pipeline 57, second sealing cover 58;

[0030] Second conveying pipeline 61, second air feeding fan 62;

[0031] The third processing tank body 71, the second connecting head 72, the partition plate 73, the first fixing frame 74, the centrifugal fan 75, the second fixing frame 76, the motor 77, the rotating rod 78, the fan blade 79, the water supply branch pipe 710, the spray head 711, the water supply main pipe 712, the first electric control valve 713, the drain pipe 714, the second electric control valve 715;

[0032] The exhaust pipe 81, the third air supply fan 82. DETAILED DESCRIPTION

[0033] The embodiments of the present disclosure will be described in further detail below with reference to the drawings and examples. The detailed description and drawings of the following examples are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure, and the present disclosure can be implemented in many different forms, and is not limited to the specific examples disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0034] The present disclosure provides these examples in order to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangement of components and steps, the composition of materials, numerical expressions and values set forth in these examples should be interpreted as merely exemplary, and not as a limitation.

[0035] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the purpose of facilitating the description of the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] In addition, "first", "second", and similar words used in the present disclosure do not indicate any order, number, or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0037] It should be noted that, in the description of the present disclosure, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances. When it is described that a specific device is located between a first device and a second device, there can be or can not be an intermediate device between the specific device and the first device or the second device.

[0038] All the terms used in the present disclosure have the same meaning as understood by those skilled in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that the terms defined in, for example, a general dictionary should be interpreted in a manner consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or excessively formalized sense, unless otherwise defined herein.

[0039] The techniques, methods, and devices known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods, and devices should be considered as part of the specification.

[0040] Reference Figures 1-6 As shown, the present scheme provides a kiln tail gas treatment equipment, which comprises, in sequence, an air inlet structure 30, a first treatment structure 20, a second treatment structure 50, a third treatment structure 70, and an exhaust structure 80. The first treatment structure 20 is provided with a filter assembly for filtering tail gas. The second treatment structure 50 can add limestone and / or brucite to absorb the tail gas. The third treatment structure 70 can spray sodium alkali solution to spray the tail gas.

[0041] The air inlet structure 30 can input tail gas into the first treatment structure 20. The first treatment structure 20 is provided with a filter assembly for filtering tail gas, which can preliminarily filter the tail gas to reduce the solid particles therein. The first treatment structure 20 delivers the filtered tail gas to the second treatment structure 50. The second treatment structure 50 can be provided with limestone and / or brucite to absorb harmful substances such as sulfur compounds, fluorine compounds, and oxygen-nitrogen compounds in the tail gas. The tail gas treated by the second treatment structure 50 can be delivered to the third treatment structure 70. The third treatment structure 70 can spray sodium alkali solution to make the sodium alkali solution fully contact with the tail gas to absorb sulfur compounds, fluorine compounds, and oxygen-nitrogen compounds therein, further reducing the content of harmful substances in the tail gas, and improving the tail gas treatment effect.

[0042] In the scheme, the preliminary treatment effect is achieved through filtering, the harmful gas in the tail gas can be adsorbed through limestone and / or brucite, the tail gas treatment performance can be better guaranteed, the third treatment structure sprays the tail gas for further improving the tail gas treatment effect, and the overall structure is relatively simple and has higher practicality.

[0043] In some embodiments, the first treatment structure 20 includes a first treatment tank body 21, a dispersion shell 22 arranged in the first treatment tank body 21, and a filter screen arranged in the first treatment tank body 21 and located on the upper side of the dispersion shell 22. The bottom of the dispersion shell 22 is provided with an inlet communicated with the air inlet structure 30, and the top of the dispersion shell 22 is provided with a plurality of first exhaust holes. Figure 2 As shown, the dispersion shell 22 is arranged at the bottom of the first treatment tank body 21, and the outer diameter of the dispersion shell 22 is substantially equal to the outer diameter of the first treatment tank body 21, so that the tail gas cannot pass between the dispersion shell 22 and the first treatment tank body 21. The bottom of the dispersion shell 22 is provided with an inlet communicated with the air inlet pipeline 31 of the air inlet structure 30, and the top of the dispersion shell 22 is provided with a plurality of first exhaust holes (see Figure 6 As shown, the dispersion shell 22 is arranged at the bottom of the first treatment tank body 21, and the outer diameter of the dispersion shell 22 is substantially equal to the outer diameter of the first treatment tank body 21, so that the tail gas cannot pass between the dispersion shell 22 and the first treatment tank body 21. The bottom of the dispersion shell 22 is provided with an inlet communicated with the air inlet pipeline 31 of the air inlet structure 30, and the top of the dispersion shell 22 is provided with a plurality of first exhaust holes (see

[0044] In some embodiments, the filter screen includes a first filter screen 23, a second filter screen 24 and a third filter screen 25 arranged in a downward direction on the upper side of the dispersion shell 22, and the mesh number of the first filter screen 23, the second filter screen 24 and the third filter screen 25 increases in turn. That is, the hole diameter of the first filter screen 23, the second filter screen 24 and the third filter screen 25 decreases in turn, so that the solid particles are filtered step by step.

[0045] In some embodiments, the second treatment structure 50 includes a second treatment tank body 51, a bearing screen 54 arranged in the second treatment tank body 51, and a bearing shell 53 arranged in the second treatment tank body 51 and located on the bearing screen 54. The bottom plate of the bearing shell 53 is provided with a plurality of first air inlet holes, and the top is provided with a second exhaust hole. The bearing screen 54 is used to bear the bearing shell 53, so that the bearing shell 53 has a certain distance from the second treatment tank body 51, so as to allow the tail gas to enter the bearing shell 53 from the bottom to the top. The bottom plate of the bearing shell 53 is provided with the first air inlet hole to allow the tail gas to enter, and can bear the limestone and / or brucite. The top of the bearing shell 53 has the second exhaust hole to allow the tail gas after contacting with the limestone and / or brucite to be discharged from the top.

[0046] In some embodiments, the third treatment structure 60 includes a third treatment tank body 61, a plurality of nozzles 62 arranged in the third treatment tank body 61, and a third exhaust structure 63 arranged in the third treatment tank body 61 and located on the nozzles 62. The nozzles 62 are arranged in the third treatment tank body 61, and the third exhaust structure 63 is arranged on the nozzles 62. Figure 2As shown, the second treatment tank body 51 is communicated with the first treatment tank body 21 through the first conveying structure 40, which comprises a first conveying pipe 41 and a first air feeding fan 42 on the first conveying pipe 41. The first conveying pipe 41 is communicated with the top of the first treatment tank body 21 and a first connecting head 52 at the lower part of the sidewall of the second treatment tank body 51, so as to transport the tail gas to the bottom of the second treatment tank body 51.

[0047] In some embodiments, the bottom plate of the bearing shell 53 is inclined, the sidewall of the bearing shell 53 is provided with a discharging pipe 57 near the lowest point of the bottom plate, and the upper part of the bearing shell 53 is provided with a feeding pipe 55 which is radially opposite to the discharging pipe 57. Figure 2 As shown, the bottom plate of the bearing shell 53 is inclined, the feeding pipe 55 is arranged at the higher side of the bottom plate, and the discharging pipe 57 is arranged at the lower side of the bottom plate, so that the limestone and / or brucite transported through the feeding pipe 55 can flow from high to low without the need of providing a power device. In particular, when it is necessary to discharge the limestone and / or brucite therein, the discharging pipe 57 can be directly opened, and the limestone and / or brucite can flow out of the discharging pipe 57 under the action of gravity. The feeding pipe 55 is provided with an openable first sealing cover 56, and the discharging pipe 57 is provided with an openable second sealing cover 58. The top plate of the bearing shell 53 can be formed as a conical structure, the highest point of which can be provided with a second exhaust hole to be connected with the second conveying structure 60, and the feeding pipe 55 passes through the second treatment tank body 51 and is connected to the top plate of the bearing shell 53.

[0048] In some embodiments, the third treatment structure 70 comprises a third treatment tank body 71, a downwardly directed spray head 711 arranged in the third treatment tank body 71, a fan arranged in the third treatment tank body 71 and located at the lower side of the spray head 711, and a centrifugal fan 75 arranged at the lower side of the fan. The spray head 711 can spray the sodium alkali solution downwardly, the fan can rotate to disperse the sodium alkali solution, and the centrifugal fan 75 can drive the tail gas to rise along the inner wall of the third treatment tank body 71 to contact with the sodium alkali solution. The spray head 711 can spray the sodium alkali solution downwardly, and the fan can disperse the sodium alkali solution in a rotating state, so that the sodium alkali solution forms smaller droplets and increases the contact area with the tail gas. The centrifugal fan 75 is spaced apart from the bottom of the third treatment tank body 71, the tail gas at the lower side of the centrifugal fan 75 flows upwardly along the central axis of the centrifugal fan 75, and under the action of the centrifugal fan 75, the tail gas entering the third treatment tank body 71 is dispersed around and flows upwardly along the inner wall of the third treatment tank body 71. The sodium alkali solution droplets dispersed by the fan fully contact with the tail gas at the inner wall of the third treatment tank body 71 to absorb the harmful substances therein.

[0049] The centrifugal fan 75 is supported by a first fixing frame 74 arranged on the bottom plate of the third treatment tank body 71. The outer side of the bottom plate of the third treatment tank body 71 is connected with a drain pipe 714, and a second electric control valve 715 or other type of control valve is arranged on the drain pipe 714. The sodium hydroxide solution (after reaction) at the bottom of the third treatment tank body 71 can be discharged through the drain pipe 714.

[0050] As shown in FIG. 6, the second conveying structure 60 includes a second conveying pipe 61 and a second air supply fan 62 arranged on the second conveying pipe 61. The carrying shell 53 is in communication with the third treatment tank body 71 through the second conveying pipe 61, and the second conveying pipe 61 is connected to the lower side wall of the third treatment tank body 71. Figure 2

[0051] In some embodiments, the third treatment structure 70 includes a partition plate 73 which is in sealing engagement with the inner wall of the third treatment tank body 71. The upper side of the partition plate 73 is provided with a motor 77 which is in transmission connection with the fan. The partition plate 73 divides the third treatment tank body 71 into an upper portion and a lower portion. The motor 77 is arranged on the upper side of the partition plate 73, the spray head 711 sprays into the portion below the partition plate 73, and the partition plate 73 can separate the motor 77 and the sodium hydroxide solution which is sprayed.

[0052] In some embodiments, the fan includes a hollow rotating rod 78 which passes through the partition plate 73 and a fan blade 79 which is connected to the rotating rod 78. The portion of the rotating rod 78 which is located below the partition plate 73 is provided with a second air inlet hole, and the portion of the rotating rod 78 which is located above the partition plate 73 is provided with a third air outlet hole. The discharge structure 80 is connected to the portion of the third treatment tank body 71 which is located above the partition plate 73. The rotating rod 78 is in transmission connection with the motor 77, and the motor 77 drives the rotating rod 78 and the fan blade 79 to rotate, so as to disperse the sodium hydroxide solution which is sprayed by the spray head 711. The radius of the fan blade 79 is greater than the radial distance between the spray head 711 and the rotating rod 78, so as to ensure that the solution which is sprayed downward by the spray head 711 can fall on the fan blade 79. In addition, the rotating rod 78 is a hollow structure, and the lower end thereof can be closed by an end plate. The portion of the rotating rod 78 which is located below the partition plate 73 is provided with a second air inlet hole, and the portion of the rotating rod 78 which is located above the partition plate 73 is provided with a third air outlet hole. The second air inlet hole can allow the treated tail gas to enter, the tail gas flows upward along the rotating rod 78 and is discharged to the portion of the third treatment tank body 71 which is located above the partition plate 73 through the third air outlet hole, and the discharge structure 80 can discharge the tail gas out of the third treatment tank body 71. The discharge structure 80 includes an exhaust pipe 81 which is connected to the third treatment tank body 71 and a third air supply fan 82 which is arranged on the exhaust pipe 81.

[0053] ​In addition, in some embodiments, the inner surface of the top plate of the third treatment tank body 71 is provided with a second fixing frame 76, and the motor 77 is arranged on the second fixing frame 76.

[0054] In addition, in some embodiments, the third treatment structure 70 comprises a water supply main pipe 712 arranged outside the third treatment tank body 71 and a plurality of water supply branch pipes 710 connected to the water supply main pipe 712 and extending into the inside of the treatment tank body, and the spray head 711 is connected to the water supply branch pipe 710 and arranged on the lower side of the partition plate 73. The water supply main pipe 712 is connected with a plurality of water supply branch pipes 710 to supply sodium hydroxide solution to the plurality of spray heads 711. The water supply branch pipe 710 penetrates through the top plate and the partition plate 73 of the third treatment tank body 71, and the lower end of the water supply branch pipe 710 is connected with the spray head 711. The water supply branch pipe 712 is provided with a first electric control valve 713 or other types of control valves.

[0055] In addition, in some embodiments, the kiln tail gas treatment device comprises a support base 10, which comprises a horizontal support plate 11 and two vertical support plates 12 connected to the lower surface of the horizontal support plate 11 to form a door-shaped cross-section structure. The first treatment structure 20, the second treatment structure 50 and the third treatment structure 70 are arranged on the support base 10, and the support base 10 is further provided with an electrical interface 100 to communicate with the power supply line and supply power to each electric component through the wires. In addition, the kiln tail gas treatment device comprises a controller 90, which can be in communication connection with each electric component, control valve, etc. to control each electric device and control valve, such as the first air supply fan 42, the second air supply fan 62, the motor 77, the centrifugal fan 75, the first electric control valve 713, the second electric control valve 715, the third air supply fan 82, etc.

[0056] In addition, the present scheme also provides a kiln tail gas treatment method, wherein the kiln tail gas treatment device described in the above scheme is used.

[0057] S1, fix the device at a suitable position, connect the power supply through the electrical interface 100 on the support base 10, open the controller 90 on the support base 10, and connect the air inlet pipeline 31, the water outlet pipe 714 and the exhaust pipe 81;

[0058] S2, open the first sealing cover 56 on the feeding pipeline 55, feed the limestone and / or brucite into the bearing shell 53 through the feeding pipeline 55, and then close the first sealing cover 56;

[0059] S3, start the first air blower 42 on the first conveying pipeline 41, the kiln tail gas enters into the first treatment tank 21 through the dispersion shell 22 on the first treatment tank 21 due to the action of the first air blower 42, and is filtered through the first filter screen 23, the second filter screen 24 and the third filter screen 25;

[0060] S4, start the second air blower 62 on the second conveying pipeline 61 to send the filtered kiln tail gas into the second treatment tank 51, and make it enter into the bearing shell 53 to react with the limestone and / or brucite to absorb the acidic substances in the flue gas;

[0061] S5, the kiln tail gas reacted with the limestone and / or brucite enters into the third treatment tank 71 through the second conveying pipeline 61, and is made to adhere to the inner wall of the third treatment tank 71 by the centrifugal fan 75 on the first fixed frame 74;

[0062] S6, start the motor 77 on the second fixed frame 76, the motor 77 on the second fixed frame 76 drives the fan blade 79 on the rotating rod 78 to rotate, and at the same time, the first electric control valve 713 is opened to spray sodium alkali solution, the sprayed sodium alkali solution is scattered by the fan blade 79 to fully contact with the kiln tail gas;

[0063] S7, start the third air blower 82 on the exhaust pipeline 81, and make the kiln tail gas contacted with the sodium alkali solution enter into the exhaust pipeline 81 through the rotating rod 78 to be discharged by the third air blower 82;

[0064] S8, the liquid and mud powder reacted with the sodium alkali solution are discharged to the sedimentation tank as raw materials through the drain pipe 714.

[0065] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0066] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A kiln tail gas treatment equipment, characterized in that: The invention comprises an air intake structure (30), a first processing structure (20), a second processing structure (50), a third processing structure (70) and an exhaust structure (80) which are connected in sequence. The first processing structure (20) is provided with a filter assembly for filtering tail gas. The second processing structure (50) can add limestone and brucite to absorb the tail gas. The third processing structure (70) can spray a sodium alkali solution to spray the tail gas. The third treatment structure (70) includes a third treatment tank body (71), a downward-facing nozzle (711) disposed in the third treatment tank body (71), a fan disposed in the third treatment tank body (71) and located below the nozzle (711), and a centrifugal fan (75) disposed below the fan, wherein the nozzle (711) is capable of spraying the sodium-alkali solution downward, the fan is capable of rotating to disperse the sodium-alkali solution, and the centrifugal fan (75) is capable of driving the exhaust gas to rise along the inner wall of the third treatment tank body (71) to contact the sodium-alkali solution; The third processing structure (70) includes a partition plate (73) whose edge is sealed and joined to the inner wall of the third processing tank (71); a motor (77) that is transmission-connected to the fan is provided on the upper side of the partition plate (73); The fan comprises a hollow rotating rod (78) passing through the partition plate (73) and a fan blade (79) connected to the rotating rod (78); the portion of the rotating rod (78) located on the lower side of the partition plate (73) is provided with a second air inlet hole; the portion of the rotating rod (78) located on the upper side of the partition plate (73) is provided with a third exhaust hole; the exhaust structure (80) is connected to the portion of the third processing tank body (71) located on the upper side of the partition plate (73); the radius of the fan blade (79) is greater than the radial distance between the nozzle (711) and the rotating rod (78).

2. The kiln tail gas treatment equipment according to claim 1, characterized in that: The first processing structure (20) includes a first processing tank body (21), a dispersion shell (22) arranged in the first processing tank body (21), and a filter screen arranged in the first processing tank body (21) and located on the upper side of the dispersion shell (22); the bottom of the dispersion shell (22) is provided with an inlet connected to the air intake structure (30); and the top of the dispersion shell (22) is provided with a plurality of first exhaust holes.

3. The kiln tail gas treatment equipment according to claim 2, characterized in that: The filter screen comprises a first filter screen (23), a second filter screen (24) and a third filter screen (25) which are arranged at intervals from bottom to top on the upper side of the dispersion housing (22), and the mesh sizes of the first filter screen (23), the second filter screen (24) and the third filter screen (25) increase in sequence.

4. The kiln tail gas treatment equipment according to claim 1, characterized in that: The second processing structure (50) includes a second processing tank body (51), a carrier net (54) arranged in the second processing tank body (51), and a carrier shell (53) arranged in the second processing tank body (51) and located on the carrier net (54), wherein the bottom plate of the carrier shell (53) is provided with a plurality of first air inlet holes and the top is provided with second air exhaust holes.

5. The kiln tail gas treatment equipment according to claim 4, characterized in that: The supporting net (54) and the bottom plate of the supporting shell (53) are arranged at an angle, a discharge pipe (57) is provided on the side wall of the supporting shell (53) near the lowest point of the bottom plate, and a feed pipe (55) is provided on the upper part of the supporting shell (53) and is radially opposite to the discharge pipe (57).

6. The kiln tail gas treatment equipment according to claim 1, characterized in that: The third treatment structure (70) includes a water supply main pipe (712) located outside the third treatment tank body (71) and a plurality of water supply branches (710) connected to the water supply main pipe (712) and extending into the interior of the treatment tank body. The nozzle (711) is connected to the water supply branch pipe (710), and the nozzle (711) is located on the lower side of the partition plate (73).

7. A method for treating kiln tail gas, characterized in that: Use the kiln tail gas treatment equipment described in any one of claims 1 to 6.

Images