Furnace grate slag breaking ring section

Abstract

The utility model discloses a fire grate slag breaking ring section which comprises a ring section body, a plurality of slag breaking ribs and a plurality of slag breaking cones, the slag breaking ribs and the slag breaking cones are arranged on the ring section body, and the slag breaking ribs are obliquely arranged on the side face of the ring section body and distributed in the circumferential direction of the ring section body at intervals. The distance between the convex surface of the slag breaking rib and the inner cavity of the furnace body is gradually reduced from top to bottom in the height direction of the ring section body; the slag breaking cones are sequentially arranged in the gaps of the slag breaking ribs from high to low in the circumferential direction of the ring section body. The slag breaking ring section and the inner cavity of the furnace body form a slag breaking space structure which is gradually reduced from top to bottom, so that the breaking stress of slag blocks is increased, slag is efficiently broken, the slag is not easy to accumulate, and the operation efficiency of the gasification furnace is favorably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of urban sludge pyrolysis, and in particular relates to a grate slag-breaking ring section of a sludge pyrolysis gasification furnace. Background Art

[0002] With the development of cities, the amount of sewage treatment has increased significantly, and the output of urban sludge has also increased dramatically. Sludge pyrolysis and gasification can help to significantly reduce the solid volume of sludge and fix the heavy metals in the sludge. It also has the characteristics of good pyrolysis carbon adsorption performance, high calorific value of pyrolysis oil, full recovery and utilization of pyrolysis gas, and low generation of harmful gases. In the sludge pyrolysis gasifier, the grate is the core component, and its slag breaking and slag discharge capacity is very important in the sludge gasification process.

[0003] However, due to the particularity of sludge material, after dehydration, drying and pyrolysis treatment, some large slag blocks with high mechanical strength will inevitably be formed. The slag breaking ring segments of the grate on the market can only break the slag blocks with general mechanical strength, and the slag breaking capacity is limited. Once the slag breaking is unsuccessful, it will directly affect the slag breaking and slag discharge efficiency, gradually causing the accumulation of large slag blocks, and then affecting the gas distribution effect of the grate and the operating stability of the gasifier.

[0004] Therefore, it is necessary to provide a grate slag breaking ring segment with strong slag breaking and slag discharge capabilities. Utility Model Content

[0005] In view of this, the utility model aims to provide a grate slag-breaking ring segment, which utilizes the slag-breaking ribs and slag-breaking cones on the ring segment body to effectively break the slag, meet the needs of efficient slag breaking and slag discharge of the slag-breaking ring segment, and ensure the long-term stable operation of the gasifier.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A grate slag-breaking ring segment is arranged in conjunction with a gasifier furnace body, comprising a ring segment body and a plurality of slag-breaking ribs and a plurality of slag-breaking cones arranged on the ring segment body, wherein the slag-breaking ribs are obliquely arranged on the side of the ring segment body and are distributed at intervals along its circumference, and the distance between the raised surface of the slag-breaking ribs and the inner wall of the gasifier cavity gradually decreases from top to bottom along the height direction of the ring segment body; the slag-breaking cones are arranged in sequence from high to low in the gaps between the slag-breaking ribs along the circumference of the ring segment body.

[0008] Furthermore, the raised surface of the slag-breaking rib includes two intersecting upper and lower planes, the upper plane is inclined relative to the side of the ring segment body, and the slag-breaking space formed by the upper plane and the inner wall of the gasifier cavity gradually becomes smaller from top to bottom.

[0009] Furthermore, the slag-breaking ribs are inclined at an angle of 45° to 90° with respect to the rotation direction of the grate.

[0010] Specifically, the number of the slag-breaking ribs is 6 to 8.

[0011] Furthermore, there are at least two slag breaking cones.

[0012] Furthermore, the grate slag-breaking ring segment serves as the last layer of the grate ring segment.

[0013] Optionally, the outer edge of the ring segment body is in a straight line shape, and a plurality of ring segment bodies are assembled into a regular polygonal slag breaking ring.

[0014] Furthermore, an edge is formed at the junction of two adjacent ring segment bodies, and the distance between the edge of the slag breaking ring and the inner wall of the gasifier cavity is the smallest.

[0015] Optionally, the outer edge of the ring segment body is arc-shaped, and a plurality of ring segment bodies are assembled into a circular slag-breaking ring.

[0016] Furthermore, the ring segment body, the slag breaking ribs and the slag breaking cone are integrally cast.

[0017] The beneficial effects of the utility model are:

[0018] The utility model forms a slag breaking space structure which gradually decreases from top to bottom between the grate slag breaking ring section and the furnace body cavity, and has a better slag breaking effect. By tilting the slag breaking ribs and the slag breaking cone, the crushing force of the slag block is increased, and the slag is efficiently broken, which is helpful to break the slag block with high mechanical strength. Furthermore, the slag breaking space below makes it difficult for the crushed slag to accumulate, which is beneficial to improving the operating efficiency of the gasifier and extending the continuous operation time of the gasifier.

[0019] The gaps between the slag breaking ribs along the circumferential direction of the slag breaking cone are distributed from high to low. The cone tip can efficiently crush the slag blocks. Different numbers of slag breaking cones can be selected according to the number of slag breaking ribs and slag breaking requirements to obtain better slag breaking effect. Furthermore, the slag breaking ribs are set at an angle, which is more conducive to the downward discharge of the crushed slag under the action of the rotating grate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the grate slag breaking ring section of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of a polygonal slag breaking ring in Embodiment 1 of the present utility model;

[0023] Figure 3 It is a cross-sectional view of the grate slag breaking ring section in Example 1 of the utility model;

[0024] The reference numerals in the drawings are as follows: 1. ring segment body, 2. slag-breaking ribs, 21. upper plane, 22. lower plane, 3. slag-breaking cone, 4. inner wall of the gasifier chamber. DETAILED DESCRIPTION

[0025] The following specific embodiments are given to further clearly, completely and in detail illustrate the technical solution of the utility model. This embodiment is the best embodiment based on the technical solution of the utility model, but the protection scope of the utility model is not limited to the following embodiments.

[0026] Example 1

[0027] A grate slag-breaking ring segment comprises a ring segment body 1 and a plurality of slag-breaking ribs 2 and a plurality of slag-breaking cones 3 arranged on the ring segment body 1, wherein the slag-breaking ribs 2 are obliquely arranged on the side of the ring segment body 1 and are distributed at intervals along the circumference thereof, and the distance between the raised surface of the slag-breaking ribs 2 and the inner cavity of the furnace body gradually decreases from top to bottom along the height direction of the ring segment body 1, and the distance between the raised surface of the slag-breaking ribs 2 and the inner wall 4 of the gasification furnace cavity is defined as the slag-breaking space; the slag-breaking cones 3 are arranged in sequence from high to low in the gaps between the slag-breaking ribs 2 along the circumference of the ring segment body 1.

[0028] Furthermore, the convex surface of the slag-breaking rib 2 includes two intersecting upper planes 21 and lower planes 22, the upper planes 21 and lower planes 22 are respectively inclined relative to the side of the ring segment body 1, and the inclination angle of the upper plane 21 is greater than the inclination angle of the lower plane 22. The slag-breaking space formed by the upper plane 21 and the inner wall 4 of the gasifier cavity gradually decreases from top to bottom, and the slag-breaking space formed by the lower plane 22 and the inner wall 4 of the gasifier cavity slightly decreases or remains unchanged from top to bottom. This structure makes it easier for the slag block to enter the slag-breaking space, the slag-breaking effect is better, and the requirements of strong slag-breaking and slag-discharging are met.

[0029] Furthermore, the slag-breaking ribs 2 are inclined at an angle of 45° to 90° with the rotation direction of the grate. The inclined slag-breaking ribs 2 are more conducive to the downward discharge of the crushed slag under the action of the rotation of the grate. The slag-breaking space below makes it difficult for the crushed slag to accumulate, which is beneficial to improving the operating efficiency of the gasifier and extending the continuous operation time of the gasifier.

[0030] Specifically, in this embodiment, the number of the slag-breaking ribs 2 is 6 to 8.

[0031] Furthermore, there are at least two slag-breaking cones 3. The gaps between the slag-breaking ribs 2 along the circumferential direction of the slag-breaking cones 3 are distributed from high to low, so that the cone tips of the slag-breaking cones 3 can efficiently crush the slag blocks, and the number of slag-breaking cones 3 is adjusted according to the number of slag-breaking ribs 2 and the slag-breaking requirements to achieve different effects.

[0032] Furthermore, the grate slag-breaking ring segment serves as the last layer of the grate ring segment.

[0033] Optionally, in this embodiment, the outer edge of the ring segment body 1 provided with the slag breaking ribs 2 is straight, and multiple ring segment bodies 1 are assembled into a regular polygonal slag breaking ring. The above-mentioned grate slag breaking ring segment of the sludge pyrolysis gasification furnace can be used as the last layer of the grate ring segment, and can be suitable for eccentric or central type, pagoda type or spiral cone type grates. According to the different appearance structures of the slag breaking ring segment, multiple slag breaking ring segments can be assembled into a regular polygonal slag breaking ring, and the regular polygonal slag breaking ring has a stronger stirring and slag breaking ability.

[0034] Preferably, the number of grate slag-breaking ring segments is 4 to 10, which can be adaptively adjusted according to the size of the outer diameter of the gasifier furnace body.

[0035] Furthermore, an edge is formed at the intersection of two adjacent slag-breaking ring segments, the slag-breaking space is the smallest, and the slag blocks are subjected to the greatest force. When the slag falls into the slag-breaking space, the larger slag blocks are subjected to the greatest extrusion and crushing force here, forming smaller slag.

[0036] Furthermore, the ring segment body 1, the slag breaking ribs 2 and the slag breaking cone 3 are integrally cast.

[0037] Optionally, the material of the ring segment may be heat-resistant steel.

[0038] The working process of the grate slag breaking ring section of the gasifier in this embodiment is as follows:

[0039] The grate slag-breaking ring section is located at the last layer of the gasifier grate and is in a rotating state during the operation of the gasifier. There are still some large slag blocks with high strength in the slag that has been initially and roughly crushed by the upper grate. These slag blocks descend to the slag-breaking space formed by the grate slag-breaking ring section and the furnace body. The inclined slag-breaking ribs 2 and slag-breaking cones 3 thereon squeeze and crush the slag for a second time, so that the slag is further crushed and smaller. Since the slag-breaking ribs 2 are inclined at an angle of 45° to 90° to the rotation direction, the inclined slag-breaking ribs 2 force the crushed slag to be discharged downward during the rotation of the grate, thereby realizing the slag-breaking and slag-discharging process of large slag blocks with high mechanical strength, and improving the safety and stability of the gasifier.

[0040] Example 2

[0041] Compared with the aforementioned first embodiment, the difference is that, in this embodiment, the outer edge of the slag-breaking ribs 2 provided on the ring segment body 1 is arc-shaped, and a plurality of ring segment bodies 1 are assembled into a circular slag-breaking ring.

[0042] In summary, a grate slag-breaking ring segment of the utility model has inclined slag-breaking ribs 2 distributed at intervals in the circumferential direction on the side of the ring segment body 1, and a plurality of slag-breaking cones 3 are distributed in sequence from high to low in the circumferential direction in the gaps between the slag-breaking ribs 2. The structure is simple, and the slag can be efficiently broken, which helps to break up slag blocks with high mechanical strength and are not easy to accumulate, and is beneficial to improving the operating efficiency of the gasifier and extending the continuous operation time of the gasifier.

[0043] The above shows and describes the main features, basic principles and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will also have various changes and improvements according to actual conditions, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A grate slag-breaking ring segment, arranged in conjunction with a gasifier furnace body, comprising a ring segment body (1) and a plurality of slag-breaking ribs (2) and a plurality of slag-breaking cones (3) arranged on the ring segment body (1), characterized in that: The slag-breaking ribs (2) are arranged obliquely on the side of the ring segment body (1) and are spaced apart along the circumference thereof; the distance between the raised surface of the slag-breaking ribs (2) and the inner wall (4) of the gasification furnace chamber gradually decreases from top to bottom along the height direction of the ring segment body (1); and the slag-breaking cones (3) are arranged in sequence from high to low in the gaps between the slag-breaking ribs (2) along the circumference of the ring segment body (1).

2. A grate slag breaking ring segment according to claim 1, characterized in that: The convex surface of the slag-breaking rib (2) comprises two intersecting upper planes (21) and a lower plane (22); the upper plane (21) is arranged obliquely relative to the side of the ring segment body (1); and the slag-breaking space formed by the upper plane (21) and the inner wall (4) of the gasifier chamber gradually becomes smaller from top to bottom.

3. The grate slag breaking ring segment according to claim 1, characterized in that: The slag-breaking ribs (2) form an inclination angle of 45° to 90° with respect to the rotation direction of the grate.

4. A grate slag breaking ring segment according to claim 3, characterized in that: The number of the slag-breaking ribs (2) is 6 to 8.

5. The grate slag breaking ring segment according to claim 1, characterized in that: There are at least two slag breaking cones (3).

6. The grate slag breaking ring segment according to claim 1, characterized in that: The grate slag-breaking ring segment serves as the last layer of the grate ring segment.

7. The grate slag breaking ring segment according to claim 1, characterized in that: The outer edge of the ring segment body (1) is in a straight line shape, and a plurality of ring segment bodies (1) are assembled into a regular polygonal slag breaking ring.

8. A grate slag breaking ring segment according to claim 7, characterized in that: An edge is formed at the junction of two adjacent ring segment bodies (1), and the distance between the edge on the slag breaking ring and the inner wall (4) of the gasification furnace chamber is the smallest.

9. The grate slag breaking ring segment according to claim 1, characterized in that: The outer edge of the ring segment body (1) is arc-shaped, and a plurality of ring segment bodies (1) are assembled into a circular slag-breaking ring.

10. A grate slag breaking ring segment according to any one of claims 1 to 9, characterized in that: The ring segment body (1), the slag-breaking ribs (2) and the slag-breaking cone (3) are integrally cast.

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