Fixed bed domestic waste pyrolysis furnace with flow guide boss

Abstract

The utility model provides a fixed-bed domestic waste pyrolysis furnace with a guide boss, comprising a waste pyrolysis furnace, a material inlet is arranged at the middle position of the furnace top of the waste pyrolysis furnace, an air distribution channel is arranged at the lower part of the furnace wall of the waste pyrolysis furnace, the furnace wall of the waste pyrolysis furnace is placed vertically, the cross-section of the waste pyrolysis furnace is rectangular, a pyrolysis gas outlet is arranged at the upper part of the waste pyrolysis furnace, an ash hopper is arranged at the lower part of the waste pyrolysis furnace, the ash hopper is connected to the furnace wall, a slag discharge port is arranged at the bottom of the ash hopper, and a guide boss is arranged in the waste pyrolysis furnace; the beneficial effects of the utility model are: the guiding effect of the guide boss of the pyrolysis gas will make the high-temperature airflow tend to be more concentrated in the middle area of ​​the waste pyrolysis furnace, so that the reaction in the waste pyrolysis furnace is more uniform and complete, thereby reducing the risk of local burning of materials in the waste pyrolysis furnace and increasing the stability of the operation of the waste pyrolysis furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of domestic waste pyrolysis furnaces, in particular to a fixed-bed domestic waste pyrolysis furnace with a guide boss. Background Art

[0002] The technology of waste pyrolysis and incineration has attracted more and more attention. The waste pyrolysis and incineration method is a process in which waste is heated to 500-1000℃ in a high-temperature oxygen-free or oxygen-deficient environment, and the heat energy is used to break the chemical bonds and convert organic matter into combustible gas, liquid fuel or coke. At present, most domestic waste pyrolysis devices use fixed beds. The waste is pyrolyzed at high temperature in the fixed bed to generate pyrolysis gas. Air is introduced into the pyrolysis chamber from the bottom of the pyrolysis furnace. After the waste is precipitated with water and some volatiles at high temperature in the pyrolysis furnace, it is pyrolyzed and burned in a nearly oxygen-free environment. Since the waste is naturally accumulated in the pyrolysis furnace to form a cone with a high middle and low sides, the pyrolysis gas naturally escapes to the surrounding ring with low resistance. Considering that the high-temperature flue gas flows upward along the furnace wall, the circular waste around the furnace wall is pyrolyzed first, and the waste in the middle of the pyrolysis furnace is pyrolyzed later, which affects the overall waste pyrolysis process in the pyrolysis furnace. At the same time, it also causes the combustible components in the generated pyrolysis gas to be low, affecting the combustion treatment effect of the subsequent secondary combustion chamber. Utility Model Content

[0003] In order to overcome the above problems existing in the prior art, the utility model provides a fixed-bed domestic waste pyrolysis furnace with a guide boss.

[0004] The utility model discloses a fixed-bed domestic waste pyrolysis furnace with a guide boss, comprising a waste pyrolysis furnace, a feeding port is arranged at the middle position of the furnace top of the waste pyrolysis furnace, an air distribution channel is arranged at the lower part of the furnace wall of the waste pyrolysis furnace, the furnace wall of the waste pyrolysis furnace is placed vertically, the cross-section of the waste pyrolysis furnace is rectangular, a pyrolysis gas outlet is arranged at the upper part of the waste pyrolysis furnace, an ash hopper is arranged at the lower part of the waste pyrolysis furnace, the ash hopper is connected to the furnace wall, a slag discharge port is arranged at the bottom of the ash hopper, and a guide boss is arranged in the waste pyrolysis furnace, and the guide boss is horizontally arranged in a ring along the four furnace walls of the waste pyrolysis furnace.

[0005] On this basis, the garbage pyrolysis furnace includes a drying layer, a pyrolysis gasification layer, a combustion layer and an ash cooling layer, and the drying layer, the pyrolysis gasification layer, the combustion layer and the ash cooling layer are arranged in sequence from top to bottom.

[0006] On this basis, the guide bosses are arranged in the drying layer and the pyrolysis gasification layer.

[0007] On this basis, the net spacing between the guide bosses is not less than 300 mm.

[0008] On this basis, the guide boss is provided with at least three layers.

[0009] On this basis, the width of the guide boss increases from bottom to top along the height direction.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: a guide boss is provided in the garbage pyrolysis furnace, and the guide boss is arranged in a horizontal ring along the four furnace walls of the garbage pyrolysis furnace. The guiding effect of the guide boss of the pyrolysis gas will make the high-temperature airflow tend to be concentrated in the middle area of ​​the garbage pyrolysis furnace, so that the reaction in the garbage pyrolysis furnace is more uniform and complete, thereby reducing the risk of local burning of materials in the garbage pyrolysis furnace and increasing the stability of the operation of the garbage pyrolysis furnace; at the same time, the guide boss of the pyrolysis gas is only arranged in the drying layer and the pyrolysis gasification layer, avoiding long-term high-temperature burning state, and ensuring that the protruding part of the guide boss of the pyrolysis gas has sufficient strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the cross-sectional structure of the garbage pyrolysis furnace of the utility model;

[0012] In the figure: 1. garbage pyrolysis furnace, 2. furnace wall, 3. pyrolysis gas outlet, 4. furnace top, 5. guide boss, 6. air distribution channel, 7. ash hopper, 8. slag discharge port, 9. feed port, 10. ash cooling layer, 11. combustion layer, 12. pyrolysis gasification layer, 13. drying layer. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] The utility model discloses a fixed bed domestic waste pyrolysis furnace with a flow guide boss, referring to Figure 1 The cross section of the garbage pyrolysis furnace 1 is rectangular, with a size of 3000mm×1500mm, a height of 5000mm, and a furnace wall 2 thickness of 100mm. The furnace of the garbage pyrolysis furnace 1 is composed of a furnace wall 2 placed vertically and surrounded; the garbage pyrolysis furnace 1 includes a drying layer 10, a pyrolysis gasification layer 11, a combustion layer 12 and an ash cooling layer 13, and the drying layer 10, the pyrolysis gasification layer 11, the combustion layer 12 and the ash cooling layer 13 are arranged in sequence from top to bottom.

[0015] The feed port 9 is opened at the center of the furnace top 4, and its shape is rectangular, and its size is 500mm×300mm; the pyrolysis gas outlet 3 is opened in the upper part of the furnace wall 2, and its shape is circular, with the center 500mm away from the top surface of the furnace top and a diameter of 200mm; the ash hopper 7 is located at the lower part of the garbage pyrolysis furnace 1, and the angle between its inclined surface and the horizontal direction is 55°. The slag discharge port 8 is opened at the bottom of the ash hopper 7, and its cross-section is rectangular, with a size of 500mm×500mm; the air distribution channel 6 is laid at the lower part of the furnace wall 2, and all channels are arranged in the horizontal direction, and their center lines are parallel to the left wall and the right wall. The air distribution channel 6 runs through the front wall and the rear wall of the garbage pyrolysis furnace 1; the pyrolysis gas guide bosses 5 are arranged on the four furnace walls of the drying layer 10 and the pyrolysis gasification layer 11, and the net spacing between the pyrolysis gas guide bosses 5 from bottom to top in the vertical direction is 300, 350 and 400 mm respectively, the thickness of each layer of the pyrolysis gas guide bosses is 50 mm, and the pyrolysis gas guide bosses 5 are arranged in 4 layers along the height direction; the width of the pyrolysis gas guide bosses 5 from bottom to top in the vertical direction (the length extending inward) is 200 mm, 250 mm, 300 mm and 350 mm respectively.

[0016] Under the working conditions of the garbage pyrolysis furnace 1, after the garbage is put into the garbage pyrolysis furnace 1 from the feeding port 9 located in the middle of the top, it will naturally form a cone shape of "high in the middle and low around". Without interfering with the airflow, due to the stacking characteristics of the garbage entering the furnace, it will naturally cause the flow resistance in the middle area of ​​the material in the furnace to be larger, and the flow resistance in the surrounding areas to be smaller, thereby naturally causing the airflow to tend to flow obliquely to the surrounding areas, which will further cause the garbage in the surrounding areas of the garbage pyrolysis furnace 1 to be reacted and consumed faster until it is burned through. At this time, most of the airflow will flow out from the burn-through area and participate in the garbage pyrolysis reaction in other areas, thereby affecting the overall garbage pyrolysis reaction in the garbage pyrolysis furnace 1, and also causing the combustible components in the generated pyrolysis gas to be lower, affecting the subsequent combustion treatment effect of the secondary combustion chamber.

[0017] Due to the guiding effect of the pyrolysis gas guide boss 5, the high-temperature airflow in the present application will tend to be concentrated in the middle area of ​​the garbage pyrolysis furnace 1, making the reaction in the garbage pyrolysis furnace 1 more uniform and complete, thereby reducing the risk of local burning of materials in the garbage pyrolysis furnace 1 and increasing the stability of the operation of the garbage pyrolysis furnace 1; at the same time, the pyrolysis gas guide boss 5 is only arranged in the drying layer 10 and the pyrolysis gasification layer 11, avoiding long-term high-temperature burning state, and ensuring that the protruding part of the pyrolysis gas guide boss 5 has sufficient strength.

[0018] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screwing", "pad installation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0020] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A fixed bed domestic waste pyrolysis furnace with a flow guide boss, comprising a waste pyrolysis furnace (1), characterized in that: A material inlet (9) is provided in the middle of the furnace top (4) of the garbage pyrolysis furnace (1); an air distribution channel (6) is provided at the lower part of the furnace wall of the garbage pyrolysis furnace (1); the furnace wall (2) of the garbage pyrolysis furnace (1) is placed vertically; the cross-section of the garbage pyrolysis furnace (1) is rectangular; a pyrolysis gas outlet (3) is provided at the upper part of the garbage pyrolysis furnace (1); an ash hopper (7) is provided at the lower part of the garbage pyrolysis furnace (1); the ash hopper (7) is connected to the furnace wall (2); a slag discharge port (8) is provided at the bottom of the ash hopper (7); a guide boss (5) is provided inside the garbage pyrolysis furnace (1); the guide boss (5) is horizontally arranged in a ring along the four furnace walls of the garbage pyrolysis furnace (1).

2. The fixed bed domestic waste pyrolysis furnace with a guide boss according to claim 1, characterized in that: The garbage pyrolysis furnace (1) comprises a drying layer (10), a pyrolysis gasification layer (11), a combustion layer (12) and an ash cooling layer (13), wherein the drying layer (10), the pyrolysis gasification layer (11), the combustion layer (12) and the ash cooling layer (13) are arranged in sequence from top to bottom.

3. The fixed bed domestic waste pyrolysis furnace with a guide boss according to claim 2, characterized in that: The guide boss (5) is arranged on the drying layer (10) and the pyrolysis gasification layer (11).

4. The fixed bed domestic waste pyrolysis furnace with a guide boss according to claim 3, characterized in that: The net spacing between the flow guide bosses (5) is not less than 300 mm.

5. The fixed bed domestic waste pyrolysis furnace with a guide boss according to claim 3, characterized in that: The flow-guiding boss (5) is provided with at least three layers.

6. The fixed bed domestic waste pyrolysis furnace with a guide boss according to claim 3, characterized in that: The width of the flow-guiding boss (5) increases sequentially from bottom to top along the height direction.

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