Smoke incinerator building process and tunnel kiln

Abstract

The invention discloses a flue gas incinerator building process and a tunnel kiln, and belongs to the technical field of kiln flue gas treatment.The flue gas incinerator building process comprises the steps that S1, a frame is taken and installed on the ground; s2, a first inner furnace wall is taken and installed on the inner side of the frame, then a first inner top wall is taken and hoisted to the top of the frame, and the end of the first inner top wall and the two ends of the first inner furnace wall form a lap joint structure; s3, a second inner furnace wall is built on the inner side wall of the first inner furnace wall, and a side flue communicating with the upper portion and the lower portion in the furnace is built and formed on the first inner furnace wall and the second inner furnace wall; s4, a second inner top wall is built and formed on the top of the second inner furnace wall, the second inner top wall divides the space in the furnace into a smoke incineration chamber located on the upper portion and a forming chamber located on the lower portion, the two ends of a side flue communicate with the forming chamber and the smoke incineration chamber correspondingly, and smoke is heated by heat emitted by the forming chamber when entering the smoke incineration chamber; and the temperature of the flue gas entering the flue gas incineration chamber is high, so that fuel consumed when the flue gas is incinerated can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of kiln flue gas treatment, and particularly relates to a masonry process for a flue gas incinerator and a tunnel kiln. Background Art

[0002] Most new energy vehicles use lithium-ion batteries as the energy source to drive the vehicle. The positive and negative electrode materials of lithium-ion batteries are sintered by a kiln. During the sintering process of the battery materials, volatile components are generated. Part of the volatile components will be completely consumed by combustion in the kiln, and the other part of the volatile components will be directly discharged into the atmosphere through the chimney. If the directly discharged part is not harmlessly treated, it will obviously cause environmental pollution. For the existing tunnel kilns used for battery sintering, an incinerator is usually added outside the kiln. The volatile flue gas discharged from the furnace is transported to the incinerator through a flue. In the incinerator, the flue gas is heated to above 800°C with fuel for combustion treatment to meet the emission standards. However, using an external incinerator has the following disadvantages: The volatile components will condense in the flue pipe in front of the incinerator and adhere to the inside of the pipe, which will corrode and block the pipe; Heating the flue gas to above 800°C requires a large amount of fuel, increasing the use cost. Therefore, there is a need for an incinerator that does not require a flue pipe and can effectively reduce the fuel cost. Summary of the Invention

[0003] One of the purposes of the present invention is to provide a masonry process for a flue gas incinerator, which solves the problems of the existing incinerator requiring additional external flue pipes and consuming a large amount of fuel for flue gas treatment.

[0004] To achieve the above-mentioned invention purpose, the technical solutions adopted by the present invention are as follows:

[0005] A masonry process for a flue gas incinerator, characterized by comprising the following steps:

[0006] S1. Take a frame and install it on the ground;

[0007] S2. Take a first inner furnace wall and install it inside the frame, and then take a first inner top wall and hoist it to the top of the frame. The end of the first inner top wall forms a lapping structure with both ends of the first inner furnace wall;

[0008] S3. Build a second inner furnace wall on the inner side wall of the first inner furnace wall, and build a side flue communicating the upper and lower parts of the furnace inside the first inner furnace wall and the second inner furnace wall;

[0009] S4. Build a second inner top wall on the top of the second inner furnace wall. The second inner top wall divides the furnace space into a flue gas incineration chamber in the upper part and a forming chamber in the lower part. Both ends of the side flue communicate with the forming chamber and the flue gas incineration chamber respectively;

[0010] S5. Build a forming furnace car under the forming chamber. The two ends of the furnace car form a sliding fit with the inner side walls at the lower part of the first inner furnace wall. Through block-by-block masonry, modular installation is achieved, reducing the construction difficulty and thus the usage cost. Inside the kiln, the inner space of the kiln is divided into a forming chamber and a flue gas incineration chamber by the second inner top wall. When the flue gas enters the flue gas incineration chamber, it is heated by the heat emitted from the forming chamber. The high temperature of the flue gas entering the flue gas incineration chamber can reduce the fuel consumption for incinerating the flue gas.

[0011] Further, in S2, a heat insulation layer is provided between the first inner furnace wall and the frame, and between the first inner top wall and the frame to prevent heat dissipation and improve the utilization rate of heat.

[0012] Preferably, in S4, the track is installed under the frame along the length direction of the frame. The bottom of the furnace car is provided with rollers, and the rollers are in rolling connection with the track. The furnace car carries the battery material to be sintered and moves inside the furnace to complete the sintering reaction and convey it outwards. The furnace car operates continuously to achieve efficient feeding and sintering.

[0013] More preferably, in S4, the second inner top wall is bent towards the flue gas incineration chamber to improve the structural strength and increase its contact area with the flue gas.

[0014] The second object of the present invention is to provide a tunnel kiln, which solves the problems of high maintenance frequency and high fuel consumption of the existing tunnel kiln's incinerator.

[0015] To achieve the above-mentioned invention object, the technical solutions adopted by the present invention are as follows:

[0016] A tunnel kiln includes a frame, a heat insulation layer, a first inner furnace wall, a second inner furnace wall, a first inner top wall, a furnace car and a second inner top wall. The heat insulation layer is arranged inside the frame. The second inner furnace wall is arranged on the side heat insulation layer. The first inner furnace wall is arranged inside the second inner furnace wall, and a side flue is provided between the first inner furnace wall and the second inner furnace wall. The first inner top wall is arranged on the top of the first inner furnace wall. The second inner top wall is arranged on the top of the second inner furnace wall. The second inner top wall divides the inner part of the kiln into a forming chamber and a flue gas incineration chamber. The furnace car is slidably connected to the lower part of the frame. The flue gas is sent into the flue gas incineration chamber through the side flue, and the heat generated by the fuel in the forming chamber heats the flue gas, reducing the fuel consumption.

[0017] Preferably, the second inner top wall is a single-arch top, which has high structural strength and high heat transfer efficiency.

[0018] Further, the lower side surface of the first inner furnace wall is recessed inward to form a guiding groove, and the two ends of the furnace car protrude to form guiding parts. The guiding parts fall into the guiding groove to form a sliding fit, preventing the furnace car from running off track during operation and improving the running stability of the furnace car.

[0019] Preferably, a track is provided on the inner side below the frame, and rollers are provided at the bottom of the furnace car. The rollers are connected to the track in a rolling manner. Moving along the track has high stability and the track has a strong bearing capacity, and a large amount of battery materials can be sintered at one time.

[0020] Furthermore, a seal is provided on the lower side of the end of the furnace car, and a seal groove is provided on the inner side below the first inner furnace wall. A sealing medium is filled in the seal groove, and the seal is slidably connected in the seal groove to form a sliding seal structure, preventing external air from mixing in when the furnace car moves and affecting the quality of the finished battery materials.

[0021] Furthermore, it further includes a lifting hook. One end of the lifting hook is connected to the top of the frame, and the other end penetrates through the heat insulation layer and the first inner top wall, which is convenient for installing the first inner top wall and can adjust the height of the first inner top wall.

[0022] The beneficial effects of the present invention are as follows:

[0023] (1) The masonry process of this flue gas incinerator uses the frame as the basic load-bearing structure, and with the lap joint installation of the first inner furnace wall and the first inner top wall, it realizes the modular rapid assembly of the furnace body structure, reduces the on-site masonry time, is suitable for off-site construction of large industrial kilns, and shortens the construction period; in the side flue formed by the first inner furnace wall and the second inner furnace wall, the side flue connects the forming chamber and the flue gas incineration chamber, so that the flue gas in the kiln is heated by the heat emitted from the forming chamber when entering the flue gas incineration chamber. The high temperature of the flue gas entering the flue gas incineration chamber can reduce the fuel consumption for incinerating the flue gas; in addition, when the flue gas is transported at a high temperature, it is not easy to condense on the inner wall of the side flue, reducing the maintenance frequency and the use cost of the kiln.

[0024] (2) The masonry process of this flue gas incinerator builds the second inner top wall into a curved single arch roof. The arch roof can effectively disperse stress in a high-temperature environment, avoiding the deformation and cracking problems of the traditional flat top structure, extending the service life of the kiln. In addition, the upwardly curved arch can heat the flue gas in the flue gas incineration chamber, increasing the contact area between the flue gas and the arch roof and improving the heat transfer efficiency.

[0025] (3) At the lower side of the end of the furnace car provided in this tunnel kiln, there is a seal, and a seal groove is provided at the lower side of the first inner furnace wall. By cooperating the seal with the seal groove and filling a sealing medium in the seal groove, the gap at the movable part of the furnace car is filled, improving the heat preservation performance, reducing the fuel consumption for sintering the battery, preventing air from entering and oxidizing the sintering battery materials, and improving the stability of the sintered finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the tunnel kiln provided by the present invention;

[0028] Figure 2Cross-sectional structure diagram of the flue gas incinerator provided by the present invention;

[0029] Figure 3 Cross-sectional view of the side flue provided by the present invention.

[0030] Reference numerals:

[0031] 1, smoke exhaust section; 2, heating-up section; 3, high-temperature section; 4, cooling section; 5, sagger; 6, flue gas treatment area; 101, forming chamber; 102, flue gas incineration chamber; 103, side flue; 11, frame; 12, heat insulation layer; 13, first inner furnace wall; 131, guiding groove; 132, sealing groove; 14, first inner top wall; 141, lifting hook; 15, second inner furnace wall; 16, track; 17, furnace car; 171, seal; 172, sealing medium; 173, guiding part; 18, second inner top wall; 19, roller; 21, smoke exhaust pipe; 22, gas source; 23, combustion-supporting blower; 24, smoke exhaust outlet; 25, smoke exhaust blower; 26, cooling blower. Detailed implementation manners

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the application without making creative efforts belong to the scope of protection of the present invention.

[0033] Embodiment 1

[0034] As Figures 1 - 3 shown, this embodiment discloses a masonry process for a flue gas incinerator, including the following steps:

[0035] S1. Take the frame 11 and install it on the ground. The frame 11 is laid forward along the flat ground, and the laying distance is determined according to the length of the kiln to be installed.

[0036] S2. Take the first inner furnace wall 13 and install it inside the frame 11, and then lift and install the first inner top wall 14 on the top of the frame 11. The end of the first inner top wall 14 forms a lapping structure with both ends of the first inner furnace wall 13, and the gap formed by the lapping is filled with a filler to ensure the sealing inside the furnace.

[0037] S3. Build the second inner furnace wall 15 on the inner side wall of the first inner furnace wall 13, and build and form a side flue 103 communicating the upper and lower parts inside the furnace between the first inner furnace wall 13 and the second inner furnace wall 15. The side flue 103 is used for transferring the volatile-containing flue gas inside. The flue gas is radiated by the heat inside the furnace during the transfer process, and the flue gas can be maintained above a certain temperature.

[0038] S4. At the top of the second inner furnace wall 15, the second inner top wall 18 is built and formed. The second inner top wall 18 divides the furnace inner space into a flue gas incineration chamber 102 in the upper part and a forming chamber 101 in the lower part. The two ends of the side flue 103 are respectively communicated with the forming chamber 101 and the flue gas incineration chamber 102;

[0039] S5. Below the forming chamber 101, a forming furnace car 17 is built. The two ends of the furnace car 17 form a sliding fit with the inner side walls at the lower part of the first inner furnace wall 13. The furnace car 17 is used to carry the crucible 5 containing battery materials.

[0040] Further, in S2, a heat insulation layer 12 is arranged between the first inner furnace wall 13 and the frame 11, and between the first inner top wall 14 and the frame 11. The heat insulation layer 12 surrounds the furnace inner space to prevent heat from leaking out and improve the utilization rate of fuel.

[0041] Further, in S4, a track 16 is installed along the length direction of the frame 11 below the frame 11. A roller 19 is arranged at the bottom of the furnace car 17. The roller 19 is in rolling connection with the track 16. The crucible 5 containing battery materials is carried on the furnace car 17. The furnace car 17 moves in the furnace, and the materials in the crucible 5 are gradually sintered and formed.

[0042] Further, in S4, the second inner top wall 18 bends towards the flue gas incineration chamber 102. The bent surface of the second inner top wall 18 contacts the flue gas, increasing the area of preheating the flue gas, thereby reducing the fuel consumption for heating and treating the flue gas and improving the utilization rate of energy.

[0043] Furthermore, in S5, a sealing groove 132 is installed on the lower side surface of the first inner furnace wall 13. A sealing member 171 is arranged below the end face of the furnace car 17. A sealing medium 172 is filled in the sealing groove 132, so that the sealing member 171 falls into the sealing groove 132 and the gap is filled by the sealing medium 172 to form a movable sealing structure, preventing external air from mixing in when the furnace car 17 moves and reducing heat leakage.

[0044] Embodiment Two

[0045] In this embodiment, a tunnel kiln is also disclosed, which includes a frame 11, a heat-insulating layer 12, a first inner furnace wall 13, a second inner furnace wall 15, a first inner top wall 14, a furnace car 17, and a second inner top wall 18. The heat-insulating layer 12 is arranged inside the frame 11. The second inner furnace wall 15 is arranged on the heat-insulating layer 12 on the side. The first inner furnace wall 13 is arranged inside the second inner furnace wall 15, and a side flue 103 is provided between the first inner furnace wall 13 and the second inner furnace wall 15. The first inner top wall 14 is arranged on the top of the first inner furnace wall 13. The second inner top wall 18 is arranged on the top of the second inner furnace wall 15. The second inner top wall 18 divides the interior of the kiln into a forming chamber 101 and a flue gas incineration chamber 102. The furnace car 17 is slidably connected to the lower part of the frame 11. A plurality of furnace cars 17 connected end to end in the tunnel kiln are used for continuously conveying the crucibles 5 containing battery materials and play a role in sealing the bottom of the tunnel kiln.

[0046] Further, the tunnel kiln is sequentially divided into a smoke exhaust section 1, a heating section 2, a high-temperature section 3, and a cooling section 4 along the processing direction of the sintering process of the battery materials. A smoke exhaust pipe 21 is provided in the smoke exhaust section 1 for extracting the flue gas and sending it into the flue gas incineration chamber 102 for incineration treatment. In the high-temperature section 3, a gas source 22 supplies gas, and a combustion-supporting blower 23 is provided to blow in oxygen for combustion support. The intensity of the fuel can be adjusted through the combustion-supporting blower 23 to ensure that the combustion reaction proceeds fully and reduce the generation of waste.

[0047] Preferably, above the heating section 2 and the high-temperature section 3 is a flue gas treatment area 6, and the flue gas incineration chamber 102 is arranged in the flue gas treatment area 6 to directly and effectively utilize the heat generated by the fuel in the section.

[0048] Preferably, the smoke exhaust outlet 24 is arranged at the top of the tunnel kiln for discharging the flue gas.

[0049] Preferably, the tunnel kiln further includes a smoke exhaust fan 25 and a cooling fan 26. The smoke exhaust fan 25 is used for extracting the gas in the kiln and can also accelerate the harmlessly treated flue gas in the flue gas incineration chamber 102. The cooling fan 26 is used for inputting cooling gas into the cooling section 4 to quickly reduce the temperature of the sintered battery materials.

[0050] Furthermore, the flue gas incineration chamber 102 is arranged in the high-temperature section 3. The temperature of the high-temperature section 3 can be the highest to preheat and keep warm the flue gas entering the flue gas incineration chamber 102, reducing the consumption of fuel for burning the flue gas.

[0051] Preferably, the second inner top wall 18 is a single-arch roof. The arch roof structure can increase the contact area of the preheated flue gas and can also prevent structural sag after long-term use, improving the durability of use.

[0052] Further, the lower side of the first inner furnace wall 13 is recessed inward to form a guiding groove 131, and both ends of the furnace car 17 protrude to form guiding parts 173. The guiding parts 173 fall into the guiding groove 131 to form a sliding fit, which plays a guiding role when the furnace car 17 moves, preventing the furnace car 17 from deviating, and the mutual engagement of the guiding parts 173 and the guiding groove 131 improves stability.

[0053] Preferably, tracks 16 are provided inside the lower part of the frame 11, and rollers 19 are provided at the bottom of the furnace car 17. The rollers 19 are rollingly connected to the tracks 16.

[0054] Furthermore, a seal 171 is provided on the lower side of the end of the furnace car 17, and a seal groove 132 is provided below the inner side of the first inner furnace wall 13. A sealing medium 172 is filled in the seal groove 132, and the seal 171 is slidably connected to the seal groove 132 to form a sliding seal structure.

[0055] Preferably, the furnace car 17 includes a chassis at the bottom and a masonry layer built on the chassis. The masonry layer is made of heat-resistant materials and is used for heat preservation and carrying the saggers 5. The furnace cars 17 are connected end to end in sequence to form a cycle for entering and leaving the kiln.

[0056] Preferably, it further includes a lifting hook 141. One end of the lifting hook 141 is connected to the top of the frame 11, and the other end penetrates through the heat preservation layer 12 and is connected to the first inner top wall 14. The lifting hook 141 includes a screw rod, and both ends of the screw rod are connected to the frame 11 and the first inner top wall 14 respectively by hanging parts. The height of the first inner top wall 14 can be adjusted through the screw rod, reducing the difficulty of building the kiln and matching more sizes of kilns, and reducing the manufacturing cost.

[0057] The working process of this tunnel kiln is as follows:

[0058] The saggers 5 containing battery materials are placed on the empty furnace cars 17. The furnace cars 17 enter the smoke exhaust section 1, heating section 2, high-temperature section 3, and cooling section 4 of the kiln in sequence and are sintered and formed. The flue gas in the furnace is sucked into the flue gas incineration chamber 102 through the smoke exhaust pipe 21. The heat generated after the fuel combustion in the forming chamber 101 is transferred to the flue gas incineration chamber 102 through the furnace wall to preheat the flue gas in the flue gas incineration chamber 102. Then, gas is input into the flue gas incineration chamber 102 and ignited to incinerate the flue gas. After the incineration is completed, it is discharged outwards.

[0059] This tunnel kiln can be built by the flue gas tunnel furnace masonry process in Embodiment 1.

[0060] Based on the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A flue gas incinerator masonry process, characterized in that: The following steps are involved: S1, take the frame (11) and install it on the ground; S2, installing the first inner furnace wall (13) on the inner side of the frame (11), and then hoisting the first inner top wall (14) on the top of the frame (11), so that the end of the first inner top wall (14) and the two ends of the first inner furnace wall (13) form an overlap structure; S3, building a second inner furnace wall (15) on the inner side wall of the first inner furnace wall (13), and building a side flue (103) connecting the upper part and the lower part of the furnace between the first inner furnace wall (13) and the second inner furnace wall (15); S4, building a second inner top wall (18) on the top of the second inner furnace wall (15), the second inner top wall (18) dividing the furnace space into a flue gas combustion chamber (102) at the top and a molding chamber (101) at the bottom, and the two ends of the side flue (103) are connected to the molding chamber (101) and the flue gas combustion chamber (102) respectively; S5. Building a forming furnace car (17) below the forming chamber (101), with both ends of the furnace car (17) forming a sliding fit with the inner side wall of the lower part of the first inner furnace wall (13).

2. The flue gas incinerator masonry process according to claim 1, characterized in that: In S2, a heat-insulating layer (12) is provided between the first inner furnace wall (13) and the frame (11) and between the first inner top wall (14) and the frame (11).

3. The flue gas incinerator masonry process according to claim 2, characterized in that: In S4, a track (16) is installed below the frame (11) along the length direction of the frame (11), and a roller (19) is provided at the bottom of the furnace car (17), and the roller (19) is rollingly connected to the track (16).

4. The flue gas incinerator masonry process according to claim 1, characterized in that: In S4, the second inner top wall (18) is bent toward the flue gas combustion chamber (102).

5. A tunnel kiln, characterized in that: The invention comprises a frame (11), an insulation layer (12), a first inner furnace wall (13), a second inner furnace wall (15), a first inner top wall (14), a furnace car (17) and a second inner top wall (18); the insulation layer (12) is arranged on the inner side of the frame (11); the second inner furnace wall (15) is arranged on the side insulation layer (12); the first inner furnace wall (13) is arranged on the inner side of the second inner furnace wall (15); a side flue (103) is arranged between the first inner furnace wall (13) and the second inner furnace wall (15); the first inner top wall (14) is arranged on the top of the first inner furnace wall (13); the second inner top wall (18) is arranged on the top of the second inner furnace wall (15); the second inner top wall (18) divides the interior of the kiln into a forming chamber (101) and a flue gas combustion chamber (102); and the furnace car (17) is slidably connected to the lower part of the frame (11).

6. The tunnel kiln according to claim 5, characterized in that: The second inner top wall (18) is a single dome.

7. The tunnel kiln according to claim 5, characterized in that: The lower side surface of the first inner furnace wall (13) is recessed inward to form a guide groove (131), and the two end portions of the furnace car (17) are protruding to form guide portions (173), and the guide portions (173) fall into the guide groove (131) to form a sliding fit.

8. The tunnel kiln according to claim 7, characterized in that: A track (16) is arranged on the inner side below the frame (11), and a roller (19) is arranged at the bottom of the furnace car (17), and the roller (19) is rollingly connected to the track (16).

9. The tunnel kiln according to claim 5, characterized in that: A sealing member (171) is provided at the lower side of the end of the furnace car (17), a sealing groove (132) is provided at the lower inner side of the first inner furnace wall (13), the sealing groove (132) is filled with a sealing medium, and the sealing member (171) is slidably connected in the sealing groove (132) to form a sliding sealing structure.

10. The tunnel kiln according to claim 5, characterized in that: It also includes a hook (141), one end of which is connected to the top of the frame (11), and the other end of which penetrates the thermal insulation layer (12) and the first inner top wall (14).

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