Cement kiln solid waste feeding device capable of preventing material concentration

Abstract

The utility model discloses a kind of cement kiln solid waste feeding devices of preventing discharging concentration, including tertiary air pipe, decomposition furnace, the tertiary air pipe end is connected with decomposition furnace by oblique ladder type feeding device in furnace, the ladder type feeding device further include feeding chamber, ladder, auxiliary blowing material device, blowing material structure, discharging mechanism.The function of the utility model is that the device can reduce the dead angle when blowing material by splay trapezoidal blowing material structure, and the direction of flow guide can be controlled according to the size of wind power, to avoid the material left on ladder accumulation;Meanwhile, the discharging mechanism in the device can control the speed of discharging by spiral material guide rod, and simultaneously, solid waste falling on distribution grid is spread by scraping blade, then it is flushed to ladder by air cannon around discharging chute, so that falling material is as evenly as possible on ladder, avoid falling material condensation, also avoid falling material like prior art splashing to furnace wall.

Description

Technical Field

[0001] This utility model patent belongs to the field of solid waste treatment equipment technology, specifically relating to a cement kiln solid waste feeding device that prevents centralized material feeding. Background Technology

[0002] The existing cement kiln incineration treatment of solid and hazardous waste generally adopts the method of crushing-mixing-pumping to pump the slurry material for incineration. This method has defects and shortcomings: After the material is transported to the tertiary air duct of the cement kiln by the original conveying system, the material is horizontally carried into the decomposition furnace by the action of tertiary air and air cannons. This method is prone to material accumulation, blockage of tertiary air duct, and affects air volume and direction, which has a significant impact on the operating conditions of the cement kiln and affects the system's operating time. At the same time, it requires frequent door opening for inspection, which poses safety hazards and wastes labor.

[0003] Therefore, in the prior art, such as the cement kiln solid waste treatment device disclosed in Chinese Patent (CN215723231U), the structure is a stepped furnace. The upper surface of the stepped furnace is provided with a solid waste and hazardous waste discharge port; the front side of the stepped furnace is provided with a tertiary air distribution port; the rear side of the stepped furnace is connected to the kiln tail decomposition furnace; the lower surface of the stepped furnace is stepped, and the inclination direction of the stepped shape is from the tertiary air distribution port to the kiln tail decomposition furnace, from high to low.

[0004] Multiple sets of air cannons are used around the steps to impact the solid waste falling on them, thereby avoiding material accumulation. However, since the stepped furnaces are all fed from the top, the falling material is basically concentrated and will agglomerate after falling due to its own weight. Even with the surrounding air cannons blowing it apart, some highly agglomerated material cannot be fully dispersed, thus affecting the calcination efficiency. To address this, a cement kiln solid waste treatment device, as disclosed in Chinese Patent (CN216954042U), uses a material dispersing rod-type material dispersing mechanism for dispersing. While this method has some effect, it has significant drawbacks. The rotating dispersing mechanism will splash the falling material onto the furnace wall, and since the wind force on the furnace wall is relatively small, it may not blow the material off. Over time, this will cause the solid waste to stick to the furnace wall, requiring time-consuming and laborious manual cleaning, which in turn affects production efficiency.

[0005] To address the aforementioned problems, this utility model proposes a cement kiln solid waste feeding device to prevent material concentration. Utility Model Content

[0006] To address the aforementioned problems, this utility model proposes a cement kiln solid waste feeding device to prevent material accumulation and agglomeration, which can avoid affecting the cement kiln's operating conditions.

[0007] To achieve the above-mentioned technical effects, this utility model is implemented through the following technical solution: a cement kiln solid waste feeding device for preventing material accumulation, comprising a tertiary air duct and a decomposition furnace. The end of the tertiary air duct is connected to the decomposition furnace via a stepped feeding device inclined into the furnace. The stepped feeding device further comprises a feeding chamber, steps, an auxiliary blowing device, a blowing structure, and a feeding mechanism. The front end of the feeding chamber is connected to the tertiary air duct. The bottom of the feeding chamber is provided with several steps inclined into the furnace. Auxiliary blowing devices are installed on the left, right, and front sides of the feeding chamber corresponding to the steps. The auxiliary blowing devices are connected to the figure-eight trapezoidal blowing structure provided in the front side of the steps. A feeding mechanism to prevent the agglomeration of falling materials is installed above the feeding chamber.

[0008] Preferably, the ladder has several levels, and the vertical height of each level in the feeding chamber is set to 30 cm.

[0009] Preferably, the auxiliary blowing device is configured as an air cannon and a blowing pipe, with the air cannon connected to the feeding chamber through the blowing pipe.

[0010] Preferably, the blowing structure further includes a trapezoidal air guide cavity, a guide plate, a positioning rod, a positioning nut, and a rod hole. The small opening on the front side of the trapezoidal air guide cavity is connected to the blowing pipe, and the large opening on the rear side of the trapezoidal air guide cavity is provided with a rod hole. A positioning rod is installed in the rod hole, and the lower side of the positioning rod is provided with a thread and can be locked by the positioning nut. The guide plate is provided in the middle of the positioning rod.

[0011] Preferably, the feeding mechanism further includes a feeding chute, a spiral guide rod, a drive motor, a distribution grid, scraper blades, air cannons, and blower pipes. The feeding chute is installed on the top of the feeding chamber. A spiral guide rod is installed in the feeding chute, and the top end of the spiral guide rod is connected to the drive end of the drive motor on the feeding chute. The bottom end of the spiral guide rod is rotatably installed in the distribution grid set in the upper middle part of the feeding chamber. A scraper blade with a thicker inner layer and a thinner outer layer is provided on the spiral guide rod on the upper side of the distribution grid. Several sets of air cannons and blower pipes facing the distribution grid are installed around the bottom end of the feeding chute.

[0012] Preferably, the upper side of the dividing grid is configured as a blade shape.

[0013] Preferably, the material distribution grid can be installed at a position higher than the air inlet of the tertiary air duct.

[0014] The beneficial effects of this utility model are: This device reduces dead zones during material blowing through the trapezoidal blowing structure in the stepped feeding device, and the direction of the flow can be controlled according to the wind force, thus avoiding material accumulation on the steps. At the same time, the feeding mechanism in this device can control the feeding speed through the spiral guide rod, and the scraper blades rotating with the spiral guide rod spread the solid waste falling onto the blade-shaped distribution grid at the top. Then, the air cannons around the feeding chute push it onto the steps, so that the falling material falls as evenly as possible on the steps, avoiding the agglomeration of falling material and avoiding the splashing of falling material onto the furnace wall as in existing technologies. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. Figure 1 This is a structural diagram of the present invention; Figure 2 This is a cross-sectional view of the main view of this utility model; Figure 3 This is the front view of the present utility model; Figure 4 This utility model Figure 3 A cross-sectional view of section A; The attached diagram lists the components represented by each number as follows: 1. Tertiary air duct; 2. Decomposition furnace; 3. Feeding chamber; 4. Step; 5. Air cannon; 6. Blowing duct; 7. Eight-character trapezoidal air guide chamber; 8. Guide plate; 9. Positioning rod; 10. Positioning nut; 11. Rod hole; 12. Discharge chute; 13. Spiral guide rod; 14. Drive motor; 15. Material distribution grid; 16. Scraper blade. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Example 1

[0017] like Figures 1 to 4As shown, the prior art in this embodiment has the following problems: The inventors found that in the prior art, because the stepped furnaces are all fed from above, the falling material is basically concentrated and will agglomerate due to its own weight after falling. Even if the surrounding air cannons blow it apart, some highly agglomerated material cannot be fully dispersed, thus affecting the calcination efficiency. Although there is currently a material dispersing mechanism using a material dispersing rod, this method has obvious drawbacks. The rotating dispersing mechanism will splash the falling material onto the furnace wall, and the wind force on the furnace wall is relatively small, so it may not blow it off. Over time, solid waste will stick to the furnace wall, which will require time-consuming and laborious manual cleaning, thus affecting production efficiency.

[0018] Therefore, the inventor provides a cement kiln solid waste feeding device to prevent material accumulation during feeding, including a tertiary air duct 1 and a decomposition furnace 2. The end of the tertiary air duct 1 is connected to the decomposition furnace 2 through a stepped feeding device 4 inclined into the furnace. The stepped feeding device 4 also includes a feeding chamber 3, steps 4, an auxiliary blowing device, a blowing structure, and a feeding mechanism. The front end of the feeding chamber 3 is connected to the tertiary air duct 1. Several steps 4 inclined into the furnace are provided at the bottom of the feeding chamber 3. Auxiliary blowing devices are installed on the left, right, and front sides of the feeding chamber 3 corresponding to the steps 4. The auxiliary blowing devices are connected to the figure-eight trapezoidal blowing structure provided in the front side of the steps 4. A feeding mechanism to prevent the falling material from agglomerating is installed above the feeding chamber 3.

[0019] Its principle and effect are as follows: The device can reduce dead angles during material blowing through the figure-eight trapezoidal blowing structure in the stepped 4 feeding device, and can control the direction of the flow according to the wind force, thereby avoiding material accumulation on the stepped 4; At the same time, the feeding mechanism in the device can control the feeding speed through the spiral guide rod 13, and the scraper blades 16 rotating with the spiral guide rod 13 spread the solid waste falling on the top blade-shaped distribution grid 15, and then the air cannons 5 around the feeding chute 12 will push it onto the stepped 4, so that the falling material falls onto the stepped 4 as evenly as possible, avoiding the agglomeration of falling material, and also avoiding the splashing of falling material onto the furnace wall as in the existing technology.

[0020] In this embodiment, the ladder 4 is provided with several levels, and the vertical height of each level of the ladder 4 in the feeding chamber 3 is set to 30 cm. The number of levels of the ladder 44 in this structure can be determined according to the space size of the specific working environment. According to the inventor's experiments, two levels of ladder 4 in the feeding chamber 3 of the cement kiln currently used in the plant are the optimal setting. When used in conjunction with the auxiliary blowing device, it can feed materials more quickly and avoid material accumulation and blockage.

[0021] In this embodiment, the auxiliary blowing device is configured as an air cannon 5 and a blowing pipe 6. The air cannon 5 is connected to the feeding chamber 3 through the blowing pipe 6.

[0022] In this embodiment, the blowing structure also includes a trapezoidal air guide cavity 7, a guide plate 8, a positioning rod 9, a positioning nut 10, and a rod hole 11. The small opening on the front side of the trapezoidal air guide cavity 7 is connected to the blowing pipe 6. The rod hole 11 is provided in the large opening on the rear side of the trapezoidal air guide cavity 7. The positioning rod 9 is installed in the rod hole 11, and the lower side of the positioning rod 9 is provided with threads and can be locked by the positioning nut 10. The guide plate 8 is provided in the middle of the positioning rod 9. The design of this structure is to reduce dead angles during blowing and to control the direction of the flow according to the wind force, thereby avoiding material accumulation on the steps 4.

[0023] In this embodiment, the feeding mechanism further includes a feeding chute 12, a spiral guide rod 13, a drive motor 14, a distribution grid 15, a scraper blade 16, an air cannon 5, and a blower pipe 6. The feeding chute 12 is installed on the top of the feeding chamber 3. The spiral guide rod 13 is installed in the feeding chute 12, and the top end of the spiral guide rod 13 is connected to the drive end of the drive motor 14 on the feeding chute 12. The lower end of the spiral guide rod 13 is rotatably installed in the distribution grid 15 located in the upper middle part of the feeding chamber 3. The spiral guide rod 13 on the upper side of the distribution grid 15 is provided with an inner thickness. The outermost scraper blade 16, and several sets of air cannons 5 and blowing pipes 6 are installed around the bottom of the feeding chute 12 facing the material distribution grid 15; the mechanism can control the feeding speed through the spiral guide rod 13, and at the same time, the scraper blade 16 rotating with the spiral guide rod 13 spreads the solid waste falling on the material distribution grid 15 with the blade-shaped top, and then the air cannons 5 around the feeding chute 12 push it onto the step 4, so that the falling material falls as evenly as possible on the step 4, avoiding the agglomeration of falling material, and also avoiding the splashing of falling material onto the furnace wall as in the prior art.

[0024] In this embodiment, the upper side of the grid of the material distribution grid 15 is set in the shape of a blade; the design of this structure is to cut and disperse the material when the air cannon 5 around the material chute 12 blows air, so as to prevent it from hanging on the grid. Example 2

[0025] The material distribution grid 15 provided in this embodiment can be installed at a position higher than the air inlet of the tertiary air duct 1 (not shown in the figure); this can avoid affecting the flow direction of the tertiary air.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cement kiln solid waste feeding device for preventing material concentration, comprising a tertiary air duct (1) and a decomposition furnace (2), wherein the end of the tertiary air duct (1) is connected to the decomposition furnace (2) via a stepped (4) feeding device inclined into the furnace, characterized in that: The stepped (4) type feeding device also includes a feeding chamber (3), a step (4), an auxiliary blowing device, a blowing structure, and a feeding mechanism. The front end of the feeding chamber (3) is connected to a tertiary air duct (1). The bottom of the feeding chamber (3) is provided with several steps (4) inclined towards the furnace. The left and right sides and the front side of the feeding chamber (3) corresponding to the step (4) are all equipped with auxiliary blowing devices. The auxiliary blowing devices are connected to the figure-eight trapezoidal blowing structure provided in the front side of the step (4). A feeding mechanism to prevent the falling material from agglomerating is installed above the feeding chamber (3).

2. The cement kiln solid waste feeding device for preventing concentrated material feeding according to claim 1, characterized in that: The steps (4) are provided with several levels, and the vertical height of each step (4) in the feeding chamber (3) is set to 30CM.

3. The cement kiln solid waste feeding device for preventing concentrated material feeding according to claim 1, characterized in that: The auxiliary blowing device is configured as an air cannon (5) and a blowing pipe (6). The air cannon (5) is connected to the feeding chamber (3) through the blowing pipe (6).

4. A cement kiln solid waste feeding device for preventing concentrated material feeding according to claim 1, characterized in that: The blowing structure also includes a trapezoidal air guide cavity (7), a guide plate (8), a positioning rod (9), a positioning nut (10), and a rod hole (11). The small opening on the front side of the trapezoidal air guide cavity (7) is connected to the blowing pipe (6). A rod hole (11) is provided in the large opening on the rear side of the trapezoidal air guide cavity (7). A positioning rod (9) is installed in the rod hole (11), and the lower side of the positioning rod (9) is threaded and can be locked by the positioning nut (10). A guide plate (8) is provided in the middle of the positioning rod (9).

5. A cement kiln solid waste feeding device for preventing concentrated material feeding according to claim 1, characterized in that: The feeding mechanism also includes a feeding chute (12), a spiral guide rod (13), a drive motor (14), a distribution grid (15), scraper blades (16), an air cannon (5), and a blower pipe (6). The feeding chute (12) is installed on the top of the feeding chamber (3). The spiral guide rod (13) is installed in the feeding chute (12), and the top of the spiral guide rod (13) is connected to the drive end of the drive motor (14) on the feeding chute (12). The bottom end of the spiral guide rod (13) is rotatably installed in the distribution grid (15) set in the upper middle part of the feeding chamber (3). The spiral guide rod (13) on the upper side of the distribution grid (15) is provided with scraper blades (16) that are thicker on the inside and thinner on the outside. Several sets of air cannons (5) and blower pipes (6) facing the distribution grid (15) are installed around the bottom end of the feeding chute (12).

6. A cement kiln solid waste feeding device for preventing concentrated material discharge according to claim 5, characterized in that: The upper side of the grid of the material distribution grid (15) is set in the shape of a knife blade.

7. A cement kiln solid waste feeding device for preventing concentrated material feeding according to claim 5, characterized in that: The material distribution grid (15) can be installed at a position higher than the air inlet of the tertiary air duct (1).

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